Ambulatory care chair

The present invention relates to a wheeled chair used in hospitals or other health care institutions, in particular to a movable care chair that can be transformed between the chair and the platform. More particularly, the present invention relates to a The wheeled hospital chair has an articulated patient support section, which can move relative to each other between a substantially upright position and a substantially horizontal platform position, and can be tilted and raised so that a patient can be reliably placed and transported on the chair Among the equipment, the chair can be transformed into a platform during medical treatment to support the patient, without the need to transfer the patient between the individual chair and the platform.

The vehicle used in hospitals or other health care institutions to transport patients from one place to another is a conventional technology. When the patient is conscious and can sit in an upright position, the conventional wheelchair can be used by caregivers. For transporting patients, this kind of wheelchair can also be used in hospitals to transport patients between hospital stations for diagnosis, treatment, or recuperation. In addition, wheelchairs with design features to assist patients in transferring between beds and wheelchairs are also known. For example, Assanah et al.s 4,453,732 and Joness U.S. Patent No. 4,119,342 each disclose a type of back, seat, and leg segments. The wheelchair can be transformed into a horizontal stretcher structure.

Generally, a stretcher with a flat patient support surface can also be used as a stretcher to transport the patient. For example, the general stretcher can be used to transport the patient before or after the operation or when the patient cannot sit upright. Generally, the stretcher can be adjusted to the same height as the surface of the patient accommodating the patient, and the patient can be moved from the stretcher to the surface of an operating table, the surface of a hospital bed, or another patient surface, such as Schrager's No. 4,629,242 and Stryker's US Patent No. 3,304,116 each discloses a stretcher with a patient support surface that can be adjusted vertically.

The caregiver may want to adjust the position of the patient supported by the carrier. In addition, the patient supported by the carrier may also want to adjust the position by himself for comfort, and has articulated back, seat, and leg sections to help the patient move in one place. Vehicles between a lying position and a sitting position are also conventionally known. For example, Foster et al.'s No. 5,230,113, Foster's No. 5,398,357, and Peck's U.S. Patent No. 4,862,529 are all assigned to the assignee of the present invention. Each discloses a hospital bed that can be transformed into a chair structure.

Some hospital beds have a patient support plate, including a plurality of articulated patient support sections, and they also have a mechanism to adjust the height of the patient support plate relative to a base frame. In addition, the hospital bed may include a mechanism to tilt the patient support plate relative to the base frame, such as Borders et al.'s No. 5,148,562, Fenwick's No. 4,894,876, and Peck's US Patent No. 4,862,529, all assigned to the assignee of the present invention, Each discloses a bed with a middle frame, the middle frame is installed on the base frame for vertical and inclined movement, and each reference case also discloses an articulated patient support plate, which is carried by the middle frame and includes an opposable The patient support section that moves on the middle frame.

The movable care chair we need can be used to transport patients or as an operating chair or platform during minor operations. The movable care chair should provide a comfortable and adjustable patient support surface , For the patient to be reliably placed on it before the operation, during the recovery period after the operation, and whenever necessary. This chair should have an articulated back, seat, and leg section, which can support the patient while sitting on it. The sitting position of the standing position is aligned with a back, seat, and leg segments and defines a substantially upward flat patient support surface to support the patient to adjust between the platform positions in a rested position. In addition, a movable care chair should include a mechanism for lifting the back, seat, and leg sections relative to a floor, and a mechanism for tilting the back, seat, and leg sections.

According to the present invention, a chair is used to support a patient above a floor, and the chair includes: a base frame; and a middle frame, which is connected to the base frame to facilitate a horizontal axis. Pivoting relative to the base frame. An articulated patient support body is installed on the middle frame. The patient support body includes the back and the acne section spaced apart in the longitudinal direction. Both are installed on the middle frame to facilitate movement relative to each other and relative to the middle frame. The back and the seat section It can move relative to the base frame according to the horizontal axis of the middle frame.

In a preferred embodiment, the movable care chair includes an articulated patient support body and defines a patient support surface. The patient support body has a back, a seat, and a leg section, which are installed on the middle frame to facilitate Move between a sitting position that carries the patient in a sitting position and a platform position that carries the patient in a lying position. The back, seat, and leg sections are relative to the middle frame and can be locked in the sitting position and the platform Infinite positions between positions. In addition, the patient support can be tilted between a Trendelenburg position and an inverted Tenderenburg position when its segments are in the platform position. When the patient support segments are in the sitting position At this time, the patient support body can be tilted backwards to shake the patient to a backrest position, or forward to assist the patient to remove the chair.

The movable nursing chair includes a base frame, which has a base frame and a class frame installed on the bottom frame to move up and down. A middle frame can be pivotally connected to the class frame to facilitate depending on the class frame A substantially horizontal horizontal axis pivots, the middle frame pivots between a forward inclined position and a backward inclined position, and can be locked at an infinite number of positions therebetween. The sections of the patient support body are installed on the middle frame to facilitate movement relative to the middle frame. When the patient support body moves between the sitting position and the platform position, the back and seat sections move relative to the base frame, and The middle frame has the same horizontal horizontal axis when pivoting between the forward tilt position and the backward tilt position.

The movable nursing chair also includes foot pedals to control the up and down movement of the stage frame, the middle frame, and the articulated patient support relative to the base frame. A leaning release handle is used to release the back, seat, and leg sections of the patient support body to facilitate movement between the sitting position and the platform position relative to the middle frame. In addition, a tilt handle can be used to separate the middle frame from the step frame of the base frame, so that it can tilt forward and backward relative to the step frame along the horizontal axis.

The movable care chair also includes a push rod, which has a handle extending over the back of the chair. When the patient support is in the sitting position, the caregiver can hold a patient while transporting the chair on the chair. Grip. A configurable center wheel can be easily placed on the floor by the caregiver to assist in manipulating the movable care chair. The caregiver can move the center wheel to contact and leave the floor by activating a pedal, and use a pedal to remove the pedal. The central wheel configuration assembly is connected to the central wheel. The pedal is also connected to a brake mechanism, which can turn and release the casters installed on the underframe. When the caregiver operates the brake mechanism, the center wheel is automatically configured to touch the floor or retract from the floor.

When the pedal is in the brake position, the brake mechanism turns the two casters and prevents the turning casters from rotating relative to the base frame. In addition, the center wheel is combined with the floor to provide a third braking point to prevent accidental rotation of the chair by the pivoting caster. When the pedal is in a neutral position, the caster swings freely and the center is spaced from the floor. When the caregiver moves the foot pedal to a manipulation position, the casters swing freely and the center wheel touches the floor. A friction contact area for the chair to rotate easily is provided to assist in the manipulation of the chair.

The movable care chair can also include a pair of arm rest assemblies, which have arm support surfaces facing upwards, and can be positioned between an ascending position and a descending position with respect to the seat section indefinitely. Each arm rest assembly includes a locking mechanism that can be locked to lock the arm support surface at any position between the rising and lowering positions, and can be releasable to allow the arm support surface of the arm rest assembly to be relative to the seat section move. Each arm rest assembly includes a release handle for releasing the locking mechanism to release the arm supporting surface to move up and down relative to the seat section.

Within the scope of the present invention, each arm rest assembly is installed on one side of the seat section, so that the arm supporting surface moves with the seat section. Within the scope of the present invention, each arm rest assembly is installed on the middle frame and adjacent to the side of the seat section, so that the arm rest assembly moves with the middle frame.

In the upward raised position, the arm supporting surface of the arm rest assembly can be used to support the arm of a patient sitting on the patient supporting surface when the string support is in the sitting position; and in the lowered position , The arm support surface is separated from the patient support surface, so that caregivers can unobstructedly lead to the patient carried by the chair, so that the patient can be transferred between the patient support surface and another patient support device, and Does not interfere with the arm rest assembly.

Other objects, characteristics, and advantages of the present invention can be understood by those skilled in the art after referring to the following detailed description of the preferred embodiments of the best mode for implementing the present invention.

<p>20Chairs/Chairs for Care</p><p>22Front end</p><p>24Backend</p><p>26First side</p><p>28Second side</p><p>30Patient support surface</p><p>32Patient support</p><p>34Back section</p><p>36Back support surface</p><p>38Block</p><p>39Seat support surface</p><p>40Legs</p><p>42Leg support surface</p><p>44Leg support surface</p><p>46Foot section</p><p>48Foot supporting surface</p><p>50The first and second arm rest assembly</p><p>52Arm rest</p><p>54Base frame</p><p>56Side Panel</p><p>58Front casters</p><p>60Rear casters</p><p>62Floor</p><p>64Horizontal axis</p><p>65 Grip</p><p>66Tilt bar</p><p>68Axis</p><p>70Reliance handle</p><p>72Release Handle</p><p>74Arm support surface</p><p>76Leg section configuration handle</p><p>78Pivot</p><p>79Side member</p><p>80Butterfly pedal</p><p>82Central wheel</p><p>86Brake-control shaft</p><p>88Pivot</p><p>90Pump pedal</p><p>92Underframe</p><p>94Class Frame</p><p>96Ascending Institution</p><p>98Medium shelf</p><p>100Control connecting rod assembly</p><p>102Rotation direction</p><p>104Rotation direction</p><p>110Control Panel</p><p>111Control Panel</p><p>112Parallel four-bar linkage</p><p>113Piston</p><p>114Drive Mechanism/Hydraulic Cylinder</p><p>115Pump</p><p>116Transverse member</p><p>118Pump pedal arm</p><p>120Foot contact surface</p><p>122Pivot</p><p>124Front tube</p><p>126 Rear tube</p><p>128hole</p><p>130Brake part</p><p>132Control part</p><p>134Arrow showing the braking direction</p><p>136Arrow showing the direction of manipulation</p><p>138Central wheel configuration assembly</p><p>140Pivot</p><p>142Long fork</p><p>144round</p><p>146Front member</p><p>148After the component</p><p>150Top link group</p><p>152Flange</p><p>154Top hole</p><p>156Bottom hole</p><p>158Flange</p><p>160Top hole</p><p>162Bottom hole</p><p>164Top link</p><p>165Bottom link</p><p>166Pivot pin</p><p>167Top surface</p><p>168Box</p><p>170Hole</p><p>172First jamb</p><p>173Second side pillar</p><p>174Axle journal</p><p>175Axle journal</p><p>176Inward extension</p><p>178Outward extension</p><p>180Locking mechanism/gas spring</p><p>182Air spring</p><p>184Curved Cable</p><p>186Flange</p><p>188Flexible control line</p><p>190Storage Rack</p><p>192Top surface</p><p>194Storage Tray</p><p>196hole</p><p>198First Leaning Link Assembly</p><p>199Second Leaning Link Assembly</p><p>200Leg configuration assembly</p><p>201Leg configuration assembly</p><p>210Locking mechanism</p><p>214Pivoting piece</p><p>216Clutch housing</p><p>218Pole</p><p>220Curved Cable</p><p>222Control line</p><p>224Block frame parts</p><p>225Rotation direction</p><p>226Back section frame</p><p>227Rotation direction</p><p>228Seat stop rod</p><p>230Tilt Link</p><p>232Extension section</p><p>234Seat section connecting rod</p><p>238Back column</p><p>239arc</p><p>240Pivot pin</p><p>242Bottom</p><p>244Pivot</p><p>246Pivot pin</p><p>248Top</p><p>250Pivot</p><p>252pin</p><p>254Pivot</p><p>256Pivot pin</p><p>258Pivot</p><p>260Front</p><p>262Fate</p><p>264Groove</p><p>266stop bolt</p><p>267Front Edge</p><p>268locking edge</p><p>269Flange</p><p>270Configure connecting rod</p><p>271Flange</p><p>272Align Link</p><p>273First end</p><p>274Driven Link</p><p>275Second end</p><p>276Connecting rod</p><p>277First end</p><p>278Leg Link</p><p>279Second end</p><p>280Foot Link</p><p>281First end</p><p>282Elongated connecting rod</p><p>283Second end</p><p>284Pivot pin</p><p>286Pivot</p><p>288Pivot</p><p>289Rotation direction</p><p>290Leg frame</p><p>292Leg frame (side) member</p><p>294Central component</p><p>296Square hole</p><p>298Pivot</p><p>300stop bolt</p><p>302clockwise</p><p>304Counterclockwise</p><p>310Barb</p><p>312Square hole</p><p>314Flange</p><p>316Foot segment axis</p><p>318Attachment Plate</p><p>319Top edge</p><p>320Long hole</p><p>321Bottom edge</p><p>322pin</p><p>32432 in the original position, 22 is separated by 62</p><p>32632 in the original position, 24 is separated by 62</p><p>32832 When tilted back to a position, 22 is separated by 62</p><p>When 33032 tilts back to a position, 24 is separated by 62</p><p>When 33232 tilts forward to a position, 24 is separated by 62</p><p>When 33432 tilts forward to a position, 22 is separated by 62</p><p>335Drive pin</p><p>336Clutch outer disc</p><p>337Curved recess</p><p>338Square hub</p><p>340Hole</p><p>341stop surface</p><p>342Clutch inner disc</p><p>343Spring</p><p>344square section</p><p>345Spring</p><p>346Non-round hole</p><p>347Clutch assembly</p><p>348Handle Assembly</p><p>350Connecting tube</p><p>351Inner end face</p><p>352Shaft end cap</p><p>354 bar</p><p>355Annular groove</p><p>356Connecting cylinder</p><p>358Hexagonal hole</p><p>359Outer face</p><p>360Circle</p><p>361Annular Groove</p><p>362Shoulder</p><p>363Circle</p><p>364Outer end face</p><p>365C-ring</p><p>366Groove</p><p>367 lugs</p><p>368Spring</p><p>369Groove</p><p>370plate</p><p>371Outer surface</p><p>372Front rail</p><p>374Rear rail</p><p>375Inner shell</p><p>376Bottom shell</p><p>377Shell</p><p>378Mounting frame</p><p>379Internal area</p><p>380Front rail</p><p>382Rear rail</p><p>384Front wall</p><p>385Inner Wall</p><p>386Back Wall</p><p>388Locking mechanism</p><p>390Spring clutch assembly</p><p>392Clutch housing</p><p>394 bar</p><p>396Pole Frame</p><p>398Curved Cable</p><p>399plate cover</p><p>400Chairs/Chairs for Care</p><p>410Front end</p><p>412Backend</p><p>414First side</p><p>416Second side</p><p>418Patient support surface</p><p>420Patient support</p><p>422Back section</p><p>423Movement direction</p><p>424Back support surface</p><p>425Movement direction</p><p>Block 426</p><p>427Back plate</p><p>428Seat support surface</p><p>429Axis</p><p>430Legs</p><p>431Cable</p><p>432Leg support surface</p><p>433Foot support surface</p><p>434The first and second arm rest assembly</p><p>435Buffer assembly</p><p>436arm rest</p><p>438 base frame</p><p>440Side panel</p><p>442Putter</p><p>443 Grip</p><p>444Tilt handle forward</p><p>445Back cover</p><p>446Tilt the handle backwards</p><p>447Concave</p><p>448Pivot</p><p>449Net</p><p>450Reliant Handle</p><p>452arm rest release handle</p><p>454Arm support surface</p><p>456Brake-control pedal wing</p><p>457cover</p><p>458bolt</p><p>459Bolt</p><p>460Axis</p><p>462Pivot</p><p>464Pump pedal</p><p>466Class Frame</p><p>468Medium shelf</p><p>470Control connecting rod assembly</p><p>472Control Panel</p><p>474Control Panel</p><p>476Scissor linkage</p><p>478Connecting rod</p><p>479Piston</p><p>480cross member</p><p>482Pump pedal arm</p><p>486Foot contact surface</p><p>487Flange</p><p>488Pivot</p><p>492Underframe</p><p>493Brake surface</p><p>494Clock handle</p><p>496Ascending Institution</p><p>497Brake direction</p><p>498Rotation direction</p><p>500Central wheel configuration mechanism</p><p>510Pivot Link</p><p>512Side member</p><p>514Side member</p><p>516Connecting rod</p><p>517Central pin</p><p>518End pin</p><p>520Flange</p><p>522Bottom pivot pin</p><p>524Bottom rail</p><p>526rail plate</p><p>528wheel</p><p>530Front bottom</p><p>532First side member</p><p>534Second side member</p><p>536Front member</p><p>538Horizontal extension bracket</p><p>540Pivot pin</p><p>542Back top</p><p>544Top rail</p><p>546Horizontal rail plate</p><p>548wheel</p><p>550Front top</p><p>552Box</p><p>554hole</p><p>556First side pillar</p><p>558Second side pillar</p><p>560hole</p><p>562Control axis</p><p>563Shell</p><p>564Locking mechanism</p><p>565Piston</p><p>566rear air spring</p><p>567Shell</p><p>568rear air spring</p><p>569Piston</p><p>570Flange</p><p>572Front Pillar</p><p>574The first long hole plate</p><p>575Air spring housing space</p><p>576Front long hole</p><p>578pin</p><p>580Flange</p><p>582Back Post</p><p>584Back Long Hole Flange</p><p>586Back long hole</p><p>588pin</p><p>590Outermost front edge</p><p>592Inner front edge</p><p>594Outermost front edge</p><p>596Inner front edge</p><p>598Lock assembly</p><p>600Connecting rod</p><p>602Locking Link</p><p>604hook</p><p>606Rear lock bolt</p><p>607Movement direction</p><p>608Movement direction</p><p>610Lock assembly</p><p>612Connecting rod</p><p>614Locking Link</p><p>616hook</p><p>618Front locking bolt</p><p>620First curved cable</p><p>622Second Curved Cable</p><p>624Flexible control line</p><p>626Flexible control line</p><p>628Relying on the assembly</p><p>630Reliance assembly</p><p>632Leg configuration assembly</p><p>634Leg configuration assembly</p><p>636Locking mechanism</p><p>638Spring clutch assembly</p><p>640Component</p><p>642Pivot piece</p><p>644Clutch housing</p><p>646D-shaped hole</p><p>648end block</p><p>650External</p><p>652Central pole</p><p>654slot</p><p>656Tongue</p><p>658Support Bearing</p><p>660Annular groove</p><p>662C-ring</p><p>664 bar</p><p>666Curved Cable</p><p>668Flexible control line</p><p>670Block frame parts</p><p>672Back Link</p><p>674 Chair stop link</p><p>676Tilt Link</p><p>678Extension section</p><p>680Short</p><p>682Front section</p><p>684Back</p><p>686Bottom</p><p>688Axis</p><p>690Pivot pin</p><p>692Pivot pin</p><p>694Top of short section 680</p><p>696Axis</p><p>698Pivot pin</p><p>700Axis</p><p>710Pivot pin</p><p>712Pivot pin</p><p>714Front</p><p>716locking edge</p><p>718Notch</p><p>720stop bolt</p><p>722locking edge</p><p>724Front Edge</p><p>726Flange</p><p>728Flange</p><p>730Rotation direction</p><p>732Rotation direction</p><p>733Rotation direction</p><p>734Rotation direction</p><p>736Rotation direction</p><p>738Rotation direction</p><p>740Movement direction</p><p>741Movement direction</p><p>742cross member</p><p>744Front member</p><p>746Swing Link</p><p>748Flange</p><p>750Axis</p><p>752Driven Link</p><p>754Flange</p><p>756Axis</p><p>758First Power Link</p><p>760Upper middle section</p><p>762The first horizontal link</p><p>764Top</p><p>766Flange</p><p>768Top</p><p>770 Follow-up Link</p><p>772Bottom</p><p>774Third Power Link</p><p>776Bottom middle section</p><p>778Top</p><p>780Pillars</p><p>781Leg frame</p><p>782Top</p><p>783Ring</p><p>784Second Power Link</p><p>786Bottom</p><p>788430 separated by 426 distance</p><p>792Flange</p><p>794Flange</p><p>800Shell</p><p>802Supporting member</p><p>804Cover</p><p>808Bottom post</p><p>812Board</p><p>814Front guide rod</p><p>816Rear guide rod</p><p>818Front guide</p><p>820 Rear guide</p><p>822Front connector</p><p>824rear connector</p><p>826Column</p><p>828Locking mechanism</p><p>830Clutch housing</p><p>832 bar</p><p>834Guide</p><p>836Curved Cable</p><p>837Flexible control wire</p><p>838Top</p><p>839Top cover</p><p>840Bottom</p><p>842Bottom cover</p><p>844Movement direction</p><p>848Ascension sub-assembly</p><p>850Long hole</p><p>852Pivot pin</p><p>854Bottom</p><p>858 Bushing</p><p>860Opening</p><p>862Front Edge</p><p>864Top edge</p><p>866Back edge</p><p>868roller track shell</p><p>870The first and second interval channels</p><p>872wheel rail</p><p>874Fork Tip</p><p>876The first and second rollers</p><p>878The first and second roller arms</p><p>880The first and second shaft pins</p><p>882Ascension Sales</p><p>884Top</p><p>886Central wheel</p><p>888Central Wheel Bracket</p><p>890Bottom</p><p>892hole</p><p>896Central Axle</p><p>898Guide Plate</p><p>900Spring</p><p>910Cave</p><p>912Bottom Wall</p><p>914Front slope</p><p>916rear slope</p><p>920Central wheel configuration assembly</p><p>922Brake-control shaft</p><p>924Pivot</p><p>926Horizontal Pipe</p><p>928U-shaped tube</p><p>930Brake pedal</p><p>932Brake surface</p><p>933Rotation direction</p><p>934Departure</p><p>936Pedals</p><p>938Control surface</p><p>939Rotation direction</p><p>940Control beam</p><p>942Longitudinal extension tube</p><p>944Horizontal tube</p><p>946U-shaped bracket</p><p>948Pivot pin</p><p>950horizontal pivot axis</p><p>952Dipper</p><p>954Concave head surface</p><p>956Axle pin</p><p>958Connecting link mechanism</p><p>960Bottom link</p><p>962Pivot pin</p><p>964Top link</p><p>966Hexagonal pin</p><p>968Top edge</p><p>970Bottom edge</p><p>972Long hole</p><p>973Movement direction</p><p>974Coupling Pin</p><p>975Movement direction</p><p>976Neutral pedal</p><p>978Foot contact surface</p><p>980Longitudinal extension column</p><p>982Central wheel arm</p><p>984horizontal pivot axis</p><p>986Pivot pin</p><p>988U-shaped bracket</p><p>990Spring</p><p>992Bent flange</p><p>993Movement direction</p><p>994Flat top edge</p><p>996Flat stop line</p>

Detailed descriptions will be specifically referred to the related drawings, in which: Figure 1 is a side view of the first example of the chair of the present invention, showing the chair in the sitting position; Figure 2 is similar to Figure 1, showing the legs and feet of the chair In the extended position; Fig. 3 is similar to Fig. 2, showing the chair in the platform position; Fig. 4 is similar to Fig. 3, showing the chair pivoting in a Tandland fort position and a reverse Tande with respect to a horizontal axis Between the Rambo position (shown by the dotted line); Figure 5 is similar to Figure 1, showing that the arm rest of the chair can move between a raised position and a lowered position; Figure 6 is similar to Figure 1, showing the chair Tilt to a forward position and a backrest position (as shown by the dotted line); Fig. 7 is an exploded perspective view of the chair of the first example of the present invention; Fig. 8 is a side view of the chair of Fig. 7; Fig. 9 is Fig. 8 The side view of the chair, which is partially cut off to show that the chair moves between the sitting position and the platform position; Figure 10 is similar to Figure 9, which shows the chair at one of the transitions between the sitting position and the platform position Position; Figure 11 is similar to Figure 10, which shows that the chair is in the platform position and can be moved back from the platform position to the sitting position; Figure 12 is an exploded perspective view of the chair handle assembly of Figure 8; Figure 13 is the present invention An exploded perspective view of the first example of the arm rest assembly, which is partially cut off to show that the structure of the arm rest can be locked at an infinite number of positions relative to the seat section of the chair; Figure 14 is the first chair of the present invention A three-dimensional view of two examples, showing that the chair is located in a sitting position and can be moved between the sitting position and a platform position; Figure 15 is an exploded perspective view of the chair of Figure 14; it is partially cut off to show the chair The structure can be facilitated to move between the sitting position and the platform position relative to a horizontal axis; Figure 16 is a side view of the chair in Figure 15, which is partially cut to show that the chair is in the platform position; Figure 17 and Figure 16 The isolated side view of the middle frame of the chair and the section frame, which is partially cut off to show that the middle frame can be pivotally connected to the stage frame and is located in a horizontal original position; Figure 18 is similar to Figure 17, which shows that the middle frame is opposite Tilt back to a backward tilt position on the step frame; Figure 19 is similar to Figure 18, which shows the middle frame tilted forward to a forward tilt position relative to the step frame; Figure 20 is a cross-sectional view taken along the line 20 of Figure 15 Figure 21 is a side view of the chair of Figure 16, which is partially cut to show that the chair is in the sitting position and can be moved between the sitting position, the transition position (indicated by the dashed line) and the platform position; Figure 22 is similar to Figure 21, which shows the transitional position of the chair between the sitting position and the platform position; Figure 23 is similar to Figure 22, which shows that the chair is in the platform position and can be moved from the platform position to the sitting position; Figure 24 is similarThe side view of another example of the chair in Figures 14-23, which is partially cut off to show that a locking mechanism can lock the back, seat, and legs of the chair so that it will not move relative to the middle frame; Figure 25 It is a three-dimensional exploded view of the second example of the frame and arm rest assembly of the present invention, which shows that the structure of an arm rest can be locked at an infinite number of positions relative to the middle frame; Figure 26 is Figure 7 and Figure 15 is an enlarged perspective view of the central wheel and central wheel arrangement assembly of the chair; Figure 27 is a side view of the central wheel and central wheel arrangement assembly shown in Figure 26; Figure 28 is the underframe of the chair of Figure 14-25 A perspective view showing another example of the central wheel arrangement assembly attached to the underframe; Figure 29 is a side view of the underframe and central wheel arrangement assembly shown in Figure 28, which shows that the central wheel is located one lifted off the floor Neutral position; Figure 30 is a side view similar to the bottom frame and center wheel configuration assembly shown in Figure 29, which shows the center wheel in a braking position and contacting the floor; Figure 31 is similar to the bottom frame shown in Figure 30 A side view of the assembly with the center wheel, showing that the center wheel is in a braking position and is in contact with the floor; Figure 32 is a side view of one of the coupling linkage mechanisms shown in Figure 31, which shows that the coupling linkage mechanism is in a linear orientation; And Fig. 33 is a side view similar to Fig. 32, which shows the connecting rod is in a backward folded position.

Schematic description

The first example of the movable care chair 20 of the present invention is shown in FIGS. 1-13, and the second example of the movable care chair 400 of the present invention is shown in FIGS. 14-25. The common components of the chairs 20 and 400 are Denoted by the same number, for example, the chair 20, 400 includes a center wheel configuration assembly 138 shown in FIGS. 26 and 27.

The chair 20 includes an articulated patient support 32, as shown in FIGS. 1-6, on which a patient can lie down. The patient support 32 includes a back section 34 with a back support surface 36, and a back section 34 with a back support surface 36. A seat section 38 of the seat supporting surface 40 and a leg section 42 having a leg supporting surface 44. The chair 20 also includes a foot section 46 having a foot support surface 48. The back support surface 36 cooperates with the seat support surface 40, the leg support surface 44, and the foot support surface 48 to define a patient support surface 30.

The chair 20 has a front end 22, a back end 24, a first side 26, and a second side 28. Since this text is described with reference to the chair 20, the term "front end 22" refers to the closest to the chair 20 The end of any reference object at the front end 22, and the "rear end 24" refers to the end of any reference object closest to the rear end 24 of the chair 20.

The chair 20 includes spaced first and second arm rest assemblies 50, which are respectively mounted on the first side 26 and the second side 28 of the chair 20, as shown in FIGS. 1-6. Each arm rest assembly 50 includes an arm rest member 52, which defines an arm support surface 74 that is generally horizontal and faces upward, on which the arm of the person carried by the chair 20 can rest.

The chair 20 includes a base frame 54 shown in FIG. 7. The front casters 58 and the rear casters 60 are mounted on the base frame 54 so that the chair 20 can roll on a floor or other surface for transporting patients, which will be referred to as hereinafter The floor 62, and the front and rear casters 58, 60 each freely rotate according to a vertical axis. The base frame 54 is shielded by a pair of side plates 56, and the patient support body 32 is supported above the base frame 54, as shown in Figs. 1-8.

A leaning handle 70 is installed in one of the arm rest assembly 50, and the leaning handle 70 is pivotally connected to the arm rest assembly 50 at a position below the arm rest 52, and extends forward therefrom, as shown in FIG. 1 , 2, 5, 6, to facilitate an upward release position that allows the back, seat, legs, and foot sections 34, 38, 42, 46 to move relative to each other, and a lock back, seat, legs, and foot sections 34, 38, 42, 46 move the back, seat, legs, and foot sections 34, 38, 42, 46 relative to each other between the downward locked positions, and the leaning handle 70 is biased to the locked position.

The movement of the leaning handle 70 to the release position allows the back, seat, legs, and foot sections 34, 38, 42, 46 to move between the sitting position shown in FIG. 1 and the platform position shown in FIG. 3. In the sitting position, the seat section 38 is generally horizontal, with the seat support surface 40 facing upward, and the back section 34 extends upward from the rear end 24 of the seat section 38, so that the back support surface 36 generally faces the front end of the chair 20 and the legs The section 42 extends downward from the front end 22 of the seat section 38 so that the leg support surface 44 is generally forwardly toward the front end 22 of the chair 20, as shown in FIG. 1. In the platform position, the back, seat, legs, and foot sections 34, 38, 42, 46 are generally aligned so that the back support surface 36, the seat support surface 40, the leg support surface 44, and the foot support surface 48 are generally upward , As shown in Figures 3 and 4 are almost in the same plane. When the back, seat, legs, and foot sections 34, 38, 42, 46 are in the required position between the sitting position and the platform position, the back, seat, legs, and foot sections 34, 38, 42, 46 can be used Move the release handle 70 to the locked position to be locked at an infinite number of positions between the sitting position and the platform position.

A stack of rods 64 has a substantially horizontal grip 65, which is mounted on the back section 34, and a tilt rod 66 which can be pivotally connected to the push rod 64 as shown in FIG. 1 to facilitate between a locked position and a released position Moving, the movement of the tilt lever 66 from the locked position to the released position allows the patient support 32 to tilt from the front to the rear according to a horizontal axis 64, as shown in FIGS. 4 and 6.

After the text, the components of the chair 20 are tilted "forward" when each reference component rotates along an axis to lower the front end 22 of the component and the rear end 24 of the component rises. Similarly, the components of the chair 20 follow an axis on each reference component When the rotation causes the rear end 24 of the assembly to drop and the front end 22 of the assembly rises, it is tilted "backward". When the back, seat, legs, and foot sections 34, 38, 42, 46 are locked in the sitting position, the platform position, or any position in between, the patient support body 32 can be tilted forward and backward.

When the back, seat, legs, and foot sections 34, 38, 42, 46 are locked in the sitting position, the patient support 32 can be tilted forward from the roughly horizontal "in-situ" shown in Figures 1, 2, and 5 The forward moving out position shown in 6 makes it easier for those who are on the chair 20 to move out of the chair 20 to a standing position. In addition, the patient support body 32 can be tilted back to the tilted back position shown in FIG. 6 (as shown by the dashed line), and the back, seat, legs, and foot sections 34, 38, 42, 46 are all locked in the sitting position. A storage rack 190 is installed at the rear end 24 of the middle rack 98 so as to be inclined accordingly. As shown in FIG. 7, the storage rack 190 has a top surface 192. The storage rack 190 includes a storage tray 194. It is placed in the storage tray 194 and carried by the chair 20.

When the back, seat, legs, and foot sections 34, 38, 42, 46 are locked in the platform position, the patient support 32 can assume the original position shown in FIG. 3. When in the original position, the patient support surface 30 The front end 22 is separated from the floor 62 by a distance 324, and the rear end 24 of the patient supporting surface 30 is separated from the floor 62 by a distance 326, and the distances 324 and 326 are approximately equal, so that the patient supporting surface 30 is approximately horizontal. In addition, when the patient support body 32 is locked at the platform position, the patient support body 32 can be tilted back to a Tandland Fort position, that is, the front end 22 of the patient support surface 30 is separated from the floor 62 by a distance 328, and the patient The rear end 24 of the supporting surface 30 is separated from the floor 62 by a distance 330 and less than a distance 328, as shown in FIG. 4. The patient support body 32 can also be tilted forward to an opposite Tandland Fort position, that is, the rear end 24 of the patient support surface 30 is separated from the floor 62 by a distance 332, and the front end 22 of the patient support surface 30 is separated from the floor 62. A distance 334 is less than the distance 332, as shown in Figure 4 (indicated by dashed lines).

An arm rest release handle 72 is installed on each arm rest assembly 50 as shown in Figs. 1-6. Each release handle 72 extends from below the arm rest 52 to facilitate an allowable arm rest 52 to face each other. Between the upward release position where the seat section 38 moves vertically and a downward locking position where the arm rests 52 are locked relative to the seat section 38 so that the arm rests 52 are fixed relative to the seat section 38, each release The handle 72 is biased toward the locked position.

The movement of the release handle 72 from the locked position to the released position allows the corresponding arm rest 52 to move between an ascending position as shown in Figs. 1-6 (as shown by the dashed line in Fig. 5) and a descending position as shown in Fig. 5 between. In the raised position, the arm rest 52 rises above the seat section 38, and in the lowered position, the arm rest 52 is adjacent to the seat section 38, so that the arm supporting surface 74 of each arm rest 52 is approximately the same as the seat The supporting surface 40 is the same plane.

Each arm rest 52 can be locked in one of the up position and the down position by moving the corresponding release handle 72 to the locked position when the selected arm rest 52 is at the required position between the up position and the down position. There are infinite locations in between. Although the arm rest 52 is adjacent to the seat section 38 in the lowered position, so that each arm support surface 74 is approximately the same plane as the seat support surface 40, the arm rest assembly 50 is provided within the scope of the present invention. The arm supporting surface 74 can be vertically located below the horizontal plane where the seat supporting surface 40 is located when the arm rest is in the lowered position.

The chair 20 also includes a leg section configuration handle 76, as shown in FIGS. When the back section 34 and the seat section 38 are locked in the sitting position, the handle 76 can pivot between a retracted position and an extended position according to the axis 78; the retracted position means that the leg section 42 and the foot section 46 are retracted to In a storage position below the seat section 38, the leg section has a leg support surface 44 to face the front end 22 of the chair 20 and the foot section has a foot support surface 48 to generally face the floor 62, as shown in Figures 1, 5, and 6 The extended position means that the leg section 42 and the foot section 46 extend to an extended position, that is, diagonally downward from the front end 22 of the seat section 38, as shown in FIGS. 2, 9.

The handle 76 can also be pulled out axially from the patient support body 32, which is along the axis 78 from a driving state connected to the leg section 42 to a disengaged state connected to the patient support body 32, but the latter is disengagedAtleg section 42. When the handle 76 is in the driving state, the leg section 42 moves relative to the seat section 38 due to the pivotal movement of the handle 76. When the handle 76 is in the disengaged state, the leg section 42 moves relative to the seat section 38 due to the pivotal movement of the handle 76. Keep it fixed. When disengaged from the leg section 42, the handle 76 can pivot forward or backward to an infinite number of downward movement positions below the seat support surface 40, one of which is shown in Figure 5; when the handle 76 is in the downward movement position and the arm rest 52 In the lowered position, the caregiver will have unobstructed access to the patient support surface 30, so that the patient supported by the chair 20 can easily move from the chair 20 to another patient support device without interfering with the armrestPlacement52orHandle 76.

As described above, the chair 20 includes a foot section 46 having a foot support surface 48, and the foot section 46 is mounted on the leg section 42 as shown in FIGS. 2-4. When the leg section 42 and the foot section 46 are in the storage position, the foot section 46 is positioned below the seat section 38, as shown in FIGS. 1, 5, and 6, and the foot supporting surface 48 is curled below the seat section 38 and generally faces toward Floor 62. When the legs and foot sections 42, 46 are in the extended position, the foot section 46 is aligned with the leg section 42, so that the leg support surface 44 and the foot support surface 48 are approximately the same plane. When the leg section 42 moves in the extended position and the platform When between positions, the foot support surface 48 and the leg support surface 44 maintain a coplanar relationship.

When the legs and foot sections 42, 46 are in the extended position, the legs and foot sections 42, 46 are automatically arranged at the platform position, and the back section 34 moves from the sitting position to the platform position. When the legs and foot sections 42, 46 move to the platform position and the handle 76 is coupled to the leg section 42 in the driving state, the handle 76 automatically rotates to the substantially horizontal position shown in FIG. 3, and the back section 34 moves to the platform position.

The chair 20 also includes a pair of brake-operating butterfly pedals 80, which are installed on the first and second sides 26, 28 of the chair 20 and connected to the base frame 54. The pedal 80 is fixed to a brake-operating shaft 86. It is installed on the base frame 54 to rotate along a pivot axis 88 extending laterally. The shaft 86 is connected to the rear casters 60 and to a center wheel 82, so that the movement of the pedal 80 can control the braking and release of the rear casters 60, and controls the center wheel 82 to be connected to the floor 62 as shown in FIGS. 1-4 and 6 Move between the downward brake-manipulation position and the neutral position spaced from the floor 62 as shown in FIG. 5.

When the pedal 80 is tilted backward to the braking position shown in Figures 1, 3, 4, and 6, the rear caster 60 is turned to prevent the rear caster 60 from rotating or swinging. In addition, the center wheel 82 moves to the brake that touches the floor 62- The maneuvering position helps prevent the caster 60 from pivoting after the chair 20 is rotated by any of the toggles. When the pedal 80 moves to the substantially horizontal neutral position shown in FIG. 5, the rear caster 60 no longer rotates, so the rear caster 60 can rotate and the center wheel 82 moves to the neutral position separated from the floor 62. Finally, when the pedal 80 is tilted forward to the operating position shown in Figure 2, the rear caster 60 can rotate and the center wheel 82 moves back to the brake-operating position contacting the floor 62, thereby providing a frictional contact with the floor 62 to assist The chair 20 is operated for easy manipulation of the chair 20.

A pump pedal 90 is pivoted on each side 26, 28 of the chair 20 to control the rising and falling of the patient support 32 relative to the floor 62. The pump pedal 90 is normally located as shown in Figs. 1-6 The intermediate locking position is to lock the patient support 32 vertically with respect to the floor 62. The pump pedal 90 can be depressed to the downward pumping position shown in FIG. 2 (indicated by the dashed line), and can be pumped to make the pump pedal 90 reciprocate between the intermediate locking position and the downward pumping position. In this way, the patient support 32 is raised relative to the floor 62. In addition, the pump pedal 90 can be raised from the intermediate locking position to an upward release position to release the patient support 32 relative to the floor 62 and lower the patient support 32 relative to the floor 62.

Therefore, the chair 20 includes an articulated patient support 32, which has a back, a seat, a leg, and a foot section 34, 38, 42, 46, and can be in the sitting position shown in FIGS. 1, 5, and 6 as shown in FIGS. Move and lock between the platform positions shown in 4. In addition, the patient support body 32 can be tilted forwards and backwards along the axis 68 when the back, seat, legs, and foot sections 34, 38, 42, 48 are all locked in the sitting position, the platform position, or any position in between. Furthermore, the articulated patient support body 32 can be raised and lowered relative to the floor 62; the leg section 42 and the foot section 46 can be retracted to the storage position, and the back section and the seat section 34, 38 can be manually operated when they are in the sitting position. It extends to the extended position, and when the back section and the seat sections 34, 38 are moved to the platform position, it can be automatically configured from the extended position to the platform position, which is the same plane as the back section 38 and the seat section 34. In addition, the chair 20 includes a central wheel 82 that can move to contact and disengage from the floor 62 and an arm rest assembly 50 with arm rests 52. The arm rests can each be in an upwardly ascending position and a downwardly descending position. Locked at an infinite number of positions in between.

It can be seen that the chair 20 is particularly beneficial to a patient care place, for example, in a hospital for patients to receive emergency care, outpatient surgery, and other same-day surgical procedures, patients can line up and sit on the chair 20 A waiting room is transported to an operating room, with the sitting position upright in the chair 20. When in the operating room, the chair 20 can be moved to a completely flat platform position, the arm rest 52 can be moved to a lowered position, and the patient support surface 30 can be raised or lowered if necessary, and the patient can be supported by the patient surface 30 transferred to an operating table. After the operation is completed, the patient can recover on the chair 20 and can be moved to the Tandland Fort position if necessary, and can assist the patient to move out of the chair 20, as shown in FIG. 6.

The base frame 54 of the chair 20 includes a bottom frame 92 with casters 58, 60 contacting the floor 62, a U-shaped step frame 94 arranged above the bottom frame 92, and a step frame 94 installed above the bottom frame 92 The ascending mechanism 96 that moves upward and downward, as shown in FIG. 7, enables the step frame 94 to ascend and descend relative to the floor 62. A middle frame 98 is pivotally connected to the step frame 94 to facilitate forward and backward tilting between a forward tilt position and a backward tilt position along the axis 68, and a control link assembly 100 (hereinafter referred to as the assembly 100) is carried by the middle frame 98, and connects the patient support body 32 to the middle frame 98. The assembly 100 controls the pivotal movement of the back, seat, legs, and foot sections 34, 38, 42, 46, respectively, relative to the middle frame 98. Therefore, the sections 34, 38, 42, 46 of the patient support body 32 can be caused by The assembly 100 moves relative to each other. The patient support body 32 is inclined with respect to the floor 62 by the middle frame 98, and the patient support body 32 is raised and lowered relative to the ground 62 by the step frame 94.

The bottom frame 92 of the chair 20 includes a transversely extending front member 146, a transversely extending rear member 148, and spacer-shaped side members 79 connecting the front and rear members 146 and 148, as shown in FIG. 7. Each side member 79 includes an upwardly extending front tube 124 provided at the front end of the side member 79 and an upwardly extending rear tube provided on the rear end 24 of the side member 79. The front caster 58 is installed from the front tube 124 and extends downward, and the rear caster 60 It is installed from the rear tube 126 and extends downward. The side plates 56 are installed on the front and rear tubes 124, 126 to cover the bottom frame 92 and part of the lifting mechanism 96, and to prevent foreign objects from accidentally inserting under the seat section 38 from either side 26, 28 of the chair 20 .

Each rear tube 126 of the bottom frame 92 is composed of a hole 128 and a shaft 86 accommodated by the hole 128, so that the shaft rotates relative to the bottom frame 92 according to a pivot axis 88. As shown in FIG. 7, part of the shaft 86 is in the transverse direction. Each rear tube 126 extends outside to define the outwardly extending portion of the shaft 86. The pedal 80 is fixed to the outwardly extending part of the shaft 86, so that the pivot of the pedal 80 on the axis 88 can make the shaft 86 rotate on the axis 88.

Each pedal 80 includes a braking portion 130 and a manipulation portion 132 as shown in FIG. 7. Applying a downward contact force to the braking portion 130 of any pedal 80 can make the shaft 86 brake in the direction of the arrow 134 in FIG. 8 on the pivot axis. 88 rotates until the shaft 86 and pedal 80 reach the braking position. Applying a downward contact force to the operating portion 132 of any pedal 80 can cause the shaft 86 to rotate in the direction of the arrow 136 in FIG. 8 along the pivot axis 88 until the shaft 86 and the pedal 80 reach the operating position.

The shaft 86 is connected to each rear caster 60 by a brake mechanism (not shown in the figure) well known to those accustomed to this technique. When the pedal 80 is in the braking position, the brake mechanism moves to a braking position to turn the rear casters. 60 and prevent the rear casters 60 from rotating. When the pedal 80 is in the operating position, the brake mechanism moves to a release position to release the rear casters 60 so that the rear casters 60 can rotate freely. Each brake mechanism is attached to the shaft 86 and positioned inside a corresponding tube 126.

A center wheel configuration assembly 138 connects the shaft 86 to the center wheel 82, so that the rotation of the shaft 86 along the axis 88 can move the center wheel 82 relative to the floor 62 between the neutral position and the brake-manipulation position. The central wheel configuration assembly 138 includes a pivot rod 140 attached to the shaft 86, and a long fork member 142, which connects the pivot rod 140 to the central wheel 82, as shown in FIGS. 27 to give a detailed description.

The lifting mechanism 96 of the chair 20 used to lift the patient support body 32 relative to the floor 62 includes a pair of spaced-apart parallel four-bar linkage mechanisms 112, each including the parallel top and bottom linkages 164, as shown in FIGS. 7 and 8 165. The parallel four link mechanism 112 is connected to each other by a cross member 116 extending transversely therebetween. Each link 164, 165 is pivotally connected to the bottom frame 92 to move in an upward position and a downward position relative to the bottom frame 92 Pivot between lowered positions. A drive mechanism 114 is connected to the bottom frame 92 and the cross member 116 to facilitate moving the connecting rods 164, 165 relative to the bottom frame 92 and the floor 62 and thus move the step frame 94, the middle frame 98, and the patient support 32 upward and downward. down.

The two pairs of flanges 152 are fixed to the front member 146 of the chassis 92 as shown in Figures 7 and 8. The flanges 152 of each pair of flanges 152 are separated to form a space between them, as shown in Figure 7, each The ends of the connecting rods 164 and 165 are then accommodated in the space between the flanges 152. Each flange 152 includes a top hole 154 aligned with a hole (not shown in the figure) at the bottom end of one of the connecting rods 164 and accommodating a pivot pin 166 to pivotally connect the connecting rod 164 to the flange 152 and chassis 92. Each flange 152 also includes a bottom hole 156, which is aligned with a hole (not shown in the figure) at the bottom of one of the connecting rods 165 and accommodates a pivot pin 166 to pivotally connect the connecting rod 165 to the flange The tray 152 and the bottom frame 92 are shown in FIG. 8. The bottom hole 156 is aligned with the top hole 154 in the vertical direction.

In addition, the top ends of the connecting rods 164 and 165 are connected to the step frame 94 through the first and second flanges 158 separated from each other. The first and second flanges are generally extended vertically downward from the step frame 94, as shown in Figure 7. , 8 shown. Each flange 158 includes a top hole 160 aligned with a hole (not shown in the figure) at the top of one of the connecting rods 164 and accommodating a pivot pin 166 to pivotally connect the connecting rod 164 to the flange 158 And the class frame 94, as shown in Figure 8. Each flange is also configured to include a bottom hole 162, which is aligned with a hole (not shown in the figure) at the top of one of the connecting rods 165 and accommodates a pivot pin 166 to pivotally connect the connecting rod 165 to the flange 158 And class frame 94. The bottom hole 162 is aligned with the top hole 160 in the vertical direction.

The holes 154 and 156 of the flange 152 on the bottom frame 92 and the holes 160 and 162 of the flange 158 of the step frame 94 are arranged so that the vertical flange 158 is in parallel with the connecting rods 164 and 165 relative to the bottom frame 92 During the upward and downward pivotal movement, the top surface 167 of the step frame 94 can be maintained in a horizontal direction when the step frame 94 is raised and lowered relative to the bottom frame 92.

It is certain that there are a variety of mechanical and electromechanical actuators and drives that can be used to lift the stage frame 94 relative to the base frame 92, which does not go beyond the scope of the present invention. It is well known in hospital bed technology that electric drive motors with different types of transmission elements, including threaded drivers and different types of mechanical linkage mechanisms, can be used to move parts of hospital stretchers, beds, and chairs relative to each other. Therefore, "Driving mechanism" and "driving device" in this text and the scope of this application shall cover all types of mechanical, electromechanical, hydraulic, and pneumatic mechanisms, including all types of manual crank mechanisms and used to make some chairs A combination of the above components with 20 lifts.

For example, the hydraulic cylinder 114 can be used as a driving mechanism. The hydraulic cylinder 114 includes a piston 113 and a pump 115. The pump is used to pressurize the hydraulic fluid and control the flow of hydraulic fluid into and out of an internal area of the hydraulic cylinder 114 (not shown in the figure). Show). For example, when the pump 115 forces the hydraulic fluid into the inner area of the hydraulic cylinder 114, the piston 113 extends and pushes the parallel four-bar linkage 112 upward, so that the stage frame 94 moves upward and away from the base frame 92. Although the pump 15 is a hydraulic pump in the figure, it can pump hydraulic fluid due to the movement of the manual pump pedal 90. It is still within the scope of the present invention as an electric pump for controlling the movement of hydraulic fluid.

The chair 20 includes a pump pedal arm 118, which is pivotally connected to the pump pedal 90 as shown in FIG. Between pivoting. Each pump pedal 90 includes a foot contact surface 120 facing upwards. The caregiver can apply a downward pumping force to the foot contact surface 120 of any pump pedal 90 so that the pump pedal 90 extends in a lateral direction. The pivot axis 122 reciprocates upward and downward between the locked position and the pumping position.

The pump pedal 90 between the pump lock position and the pumping position can pressurize the pump 115 on the hydraulic fluid and force the hydraulic fluid to flow into the inner area of the hydraulic cylinder 114, thereby moving the stage frame 94 upward relative to the bottom frame 92 Leave the descending position and towards the ascending position, as described above. When the pump pedal 90 is lifted up through the locked position to the release position, the hydraulic fluid can be allowed to flow out of the inner area of the hydraulic cylinder 114, so that the piston 113 is retracted into the hydraulic cylinder 114 and the parallel four-bar linkage 112 pivots downward to the lowered position. On the bottom frame 92 to lower the step frame 94 to the lowered position.

A pair of upwardly extending spacer box bodies 168 are connected to the top surface 167 of the stage frame 94. As shown in FIG. 7, each box body 168 is formed to include a hole 170, which is a supporting bearing (not shown) and is on the same line. , The hole 170 defines the axis 68.

A first main journal 174 is fixedly connected to the first side post 172 of the middle frame 98 and a second main journal 175 is fixedly connected to a second side post 173 of the middle frame 98, as shown in FIG. 7, the journal 174 , 175 each includes an inward extending portion 176 extending inward from the middle frame 98 and an outward extending portion 178 extending outward from the middle frame 98. The inward extending portions 176 of the journals 174 and 175 are formed by the box body 168 The bearing of the corresponding hole 170 is received, so the middle frame 98 can pivot on the axis 68 between the forward tilt position and the backward tilt position relative to the step frame 94.

A locking mechanism 180 connects the middle frame 98 to the step frame 94, as shown in Figs. 94 to prevent the middle frame 98 from moving between the locked positions where the middle frame 98 pivots relative to the step frame 94. The locking mechanism 180 can lock the middle frame 98 at an infinite number of positions between the forward inclined position and the backward inclined position. The locking mechanism 180 has a pivotable front end of the step frame 94 and a pivotable behind the middle frame 98 At the end, the locking mechanism 180 includes an air spring and can be regarded as the locking mechanism 180 and the air spring 180 hereinafter.

The air spring 180 includes a housing and a piston slidably contained in the housing. The air spring 180 can be locked so that the piston is substantially fixed relative to the housing, and no longer protrudes out of the housing or retracts into the housing. This prevents the middle frame 98 from pivoting relative to the step frame 94.

Although the locking mechanism 180 is an air spring to lock the middle frame 98 relative to the step frame 94, the locking mechanism 180 includes any locking mechanism within the scope of the present invention, which can be extended and retracted, and can be locked to prevent the locking mechanism from moving , And can be released to allow the locking mechanism to move. Therefore, the locking mechanism and locking device used in this document and the scope of the application include a gas spring, a spring clutch, a ball screw, a hydraulic cylinder, a pneumatic cylinder, or any other suitable latching or locking mechanism.

An arc cable 184 includes a flexible control wire 188 enclosed in the sheath shown in FIG. 7, which extends from the gas spring 180 to tilt the rod 66, as shown in FIG. 8, to lock and release the gas spring 180, so that the movement of the piston of the gas spring 180 relative to the housing of the gas spring 180 can be controlled by the movement of the wire 188 of the arc cable 184. When the tilt rod 66 is in the locked position, the line 188 of the arc cable 184 is positioned to position the piston relative to the housing. Sliding relative to the housing, the middle frame 98 can pivot relative to the step frame 94 between a forward tilt position and a backward tilt position.

The air spring 180 can be pressed to its locking mode, so that the air spring 180 presses the tilt lever 66 to the locked position. When the tilt lever is moved to the released position, the middle frame 98 and the patient support body 32 installed on the middle frame 98 are It can be tilted to the required position. Once the middle frame is tilted to the required position, the tilt lever 66 can be released to lock the air spring 180, thereby locking the middle frame 98 with respect to the step frame 98 and at the same time connecting the curved cable 184 The control wire 188 and the tilt lever 66 automatically move to the locked position.

As mentioned above, the assembly 100 is carried by the middle frame 98 and connected to the patient support body 32 to control the pivotal movement of the back, seat, legs, and foot sections 34, 38, 42, and 46 relative to the middle frame 98. The back section 34 is defined by the laterally spaced back section frame members 226; the seat section 38 is defined by the laterally spaced seat section frame members 224, and the seat section frame members are pivotally connected to the back section frame member 226 and movably use the control panel 110 and 111 are connected to the middle frame 98; the leg section 42 is defined by a U-shaped leg section frame 290, which is pivotally connected to the seat section frame member 224; and the leg section 46 is a foot link rod with lateral spacing 280 support, the foot link can be pivotally connected to the frame body 290 of the leg section 42, as shown in FIG.

The assembly 100 includes a control board 110, which is rotatably connected to the middle frame 98 adjacent to the first side 26 of the chair 20, as shown in FIGS. 7-11, and the control board 111 is positioned at the second side adjacent to the chair 20. The side 28 is rotatably connected to the middle frame 98. The control boards 110, 111 each include a hole 196, and the journals 174, 175 are received by the hole 196, so that the control boards 110, 111 are mounted on the middle frame 98 so as to be on the axis 68 relative to the middle frame 98 and relative to the step frame 94 Rotate.

The assembly 100 includes the first and second lean link assemblies 198, 199 (hereinafter referred to as lean assemblies 198, 199), as shown in Figure 7-11, the lean assemblies 198, 199 are connected to the back section 34 and The seat section 38 controls the pivotal movement of the back section 34 and the seat section 38 relative to each other and relative to the middle frame 98. In addition, the leg section configuration link assemblies 200, 201 (hereinafter referred to as the leg configuration assembly 200, 201) are connected to the legs, feet, and seat sections 42, 46, 38 to control the leg section 42 and the foot section 46 Movement between each other, relative to the seat section 38, and relative to the middle frame 98.

The leaning assemblies 198, 199 and the leg configuration assemblies 200, 201 are pivotally connected to the control panels 110, 111, respectively, as shown in Figures 7-11. As a result, the control panels 110, 111 can be seated relative to the middle frame 98. Between the standing position and the platform position, the positions of the back, seat, legs, and foot sections 34, 38, 42, 46 of the patient support body 32 between each other and relative to the middle frame 98 are established.

A locking mechanism 210 connects the assembly 100 to the middle frame 98. As shown in FIG. 7, the locking mechanism 210 includes a front end 22 connected to the middle frame 98 and a rear end 24 connected to a short film 214. The short film is fixed to the controlplate111, as shown in Figure 7. The locking mechanism 210 can be locked, and the front end 22 of the locking mechanism 210 is locked relative to the rear end 22, and the locking mechanism 210 can be released, and relative to the rear end 24 to allow the front end 22 to move, so that the locking mechanism 210 can be extended and retracted . When the front end 22 of the locking mechanism 210 is locked relative to the rear end 24, the locking mechanism 210 can prevent the control board 111 from moving relative to the middle frame 98.

The locking mechanism 210 includes a spring clutch with a clutch housing 216 and a rod 218 slidably accommodated by the clutch housing 216. The locking mechanism 210 may be referred to as the locking mechanism 210 and the spring clutch 210 in the text hereinafter. The rod 218 can be positioned at an infinite number of positions relative to the housing 216. As a result, the control board 111 can be locked at an infinite number of positions relative to the middle frame 98, and the patient support 32 can be positioned between the sitting position and the platform position. The time is locked at an infinite number of positions relative to the middle frame 98.

The spring clutch 210 includes a coil-type grasping spring (not shown in the figure), which is accommodated in the clutch housing 216 and defines an internal area to accommodate a part of the rod 218. When the locking mechanism 210 is locked, the gripping spring is confined to the circumference of the rod 218 to prevent the rod 218 from sliding relative to the spring and the clutch housing 216. Although the locking mechanism 210 includes a spring clutch, the locking mechanism 210 includes any locking mechanism with reference to the locking mechanism 180 within the scope of the present invention, which is suitable for locking the control board 111 relative to the middle frame 98.

An arc cable 220 includes a flexible control wire 222, the control wire is wrapped in a sheath, and the arc cable is connected to a spring and structurally allows the control wire 222 to move and release the spring around the rod 218 , Thereby releasing the spring clutch 210, so that the rod 218 can slide relative to the spring and relative to the clutch housing 216. The arc cable 220 extends from the clutch housing 216 through one of the arm rest assembly 50 and reaches the lean handle 70. The control wire 222 is connected to the leaning handle 70, so when the leaning handle 70 is in the locked position, the spring restricts the rod 218 and the rod 218 is locked with respect to the clutch housing 216. The locking mechanism 210 can be bent to its locked position to press the leaning handle 70 to the locked position, and when the leaning handle 70 pivots from the locked position to the release position, the leaning handle 70 moves the control line 222, relaxes the spring, and releases the lock The mechanism 210 allows the rod 218 to slip relative to the clutch housing 216. When the leaning handle 70 is released, the locking mechanism 210 automatically locks the patient support 32 relative to the middle frame 98, and automatically moves the control line 222 and the leaning handle 70 to the locked position.

As mentioned above, the assembly 100 includes the control board 110 arranged on the first side 26 of the chair 20, the reclining assembly 198, and the leg arrangement assembly 200, and the control board arranged on the second side 28 of the chair 20 111. Leaning assembly 199, and leg configuration assembly 201. The latter is similar to the corresponding component on the first side 26 of the chair 20, except that the partial assembly 100 mounted on the second side 28 is mounted on A mirror image of the partial assembly 110 on the first side 26. The control board 110, the leaning assembly 198, and the leg configuration assembly 200 and their operations are roughly similar to those of the control board 111, the leaning assembly 199, and the leg configuration assembly 201, respectively. Therefore, for the control board 110, the leaning assembly The descriptions of 198 and the leg configuration assembly 200 are also applicable to the control board 111, the lean assembly 199, and the leg configuration assembly 201, unless otherwise specified.

The patient support body 32 includes a back section frame member 226 extending in the longitudinal direction and a laterally spaced back section 34, a seat section frame member 224 extending in the longitudinal direction and a laterally spaced seat section 38, and including a longitudinally extending and transversely extending back section frame member 224 The leg frame 290 of the separated leg frame member 292. The leaning assembly 198 connects the control panel 110 and the middle frame 98 to the back section 34 and the seat section 38, as shown in Figures 7-11, and the leg configuration assembly 200 connects the control panel 110 and the leaning handle 70 to the patient support body 32 leg and foot section 42,46.

The leaning assembly 198 includes a segment link 234, which is fixed to the rear end 24 of the seat segment frame member 224, and connects the seat segment frame member 224 to the control board 110 and the back segment frame member 226, as shown in FIGS. 7-11. A bottom end 242 of the seat link 234 can be pivotally connected to the control board 110 by a pivot pin 240, as shown in Figures 9-11, so that the seat 38 can pivot relative to the control board 110, the seat link A top end 248 of the 234 is pivotally connected to the back section frame member 226 by a pivot pin 246, so that the back section 34 and the seat section 38 can pivot relative to each other according to a pivot axis 250 defined by the pin 246. In addition, the leaning assembly 198 includes an inclined connecting rod 230 that connects the seat section frame member 224 to the middle frame 98, as shown in FIG. 7, so as to control the movement of the seat section 38 relative to the middle frame 98.

The inclined link 230 has a first end that is pivotally connected to a flange 269 and the flange is projected from the frame member 224 and a set of flanges 271 that is pivotally connected to the middle frame. As shown in Figure 7, the flange 269 is roughly located in the middle section between the front end 22 and the rear end 24 of the seat section frame member 224, and the flange set 271 is adjacent to the middle frame 98. Front end 22. Therefore, the inclined link 230 connects the seat section 38 to the middle frame 98, and the seat section link 234 connects the seat section 38 to the back section 34 and the middle frame 98 via the control board 110 to facilitate relative movement thereof.

The leaning assembly 198 also includes a back section post 238, which is fixed to the back section frame member 226 and extends substantially downward therefrom, as shown in FIGS. 7-11. A pivot pin 252 connects a chair stop link 228 of the leaning assembly 198 to the pillar 238, and a pivot pin 256 spaced apart from the pin 252 connects the chair stop link 228 to the control board 110 to make the back section The frame member 226 is movably connected to the control board 110. Therefore, the back section frame member 226 is connected to the control board 110 through the seat stop link 228 and the seat section link 234 of the seat section frame member 224, so that the back section 34, the seat section 38, and the control board 110 are pivoted to each other. The movement of any one of the back section 34, the seat section 38, or the control board 110 relative to the middle frame 98 will cause the other to pivot relative to the middle frame 98.

When the back section 34 and the seat section 38 are in the sitting position, the control board 110 has an orientation extending substantially rearward from the axis 68, as shown in FIGS. 7-9. As described above, when the locking mechanism 210 is locked, the locking mechanism 210 prevents the control board 110 from moving relative to the middle frame 98, so that the back section 34 and the seat section 38 are locked relative to the middle frame 98. Release the locking mechanism 210 to allow The back section 34 and the seat section 38 move.

For example, when the patient support body 32 is in the sitting position shown in FIG. 9, the caregiver can release the locking mechanism 210 and pull the back section 34 downward in the direction of the arrow 225 along the axis 250 to the platform position. When the back section 34 moves down, the back section post 238 pushes down and forward, thereby pushing the chair stop link 228 forward. The forward movement of the chair stop link 228 can be shown in Figure 9. As shown, the control board 110 is rotated clockwise in the direction of the arrow 102 along the axis 68, and the control board 110 is rotated clockwise in the direction 102 to move the pivot pin of the seat link 224 along an arc 239 formed along the axis 68. 240, that is, as shown in Figures 9 and 10, the seat link 234 and the seat frame member 224 are moved along the axis 68, so that when the back section 34 moves from the sitting position to the platform position along the axis 68, the seat 38 is controlled The plate 110 rotates and moves along the axis 68.

The seat section link 234 cooperates with the tilt link 230 to limit the movement range of the front end 22 of the seat section 38. Therefore, when the patient support body 32 moves from the sitting position in FIG. 9 to the platform position in FIG. 11, the seat section 38 is as shown in FIG. The substantially horizontal flat position adjacent to the middle frame 98 shown in 9 moves to the inclined transition position shown in FIG. 10 where the front end 22 of the seat section 38 is raised above the rear end 24 of the seat section, and then when the patient support body 32 is in the platform position, As shown in FIG. 11, it moves to a substantially horizontal position separated from the middle frame 98. It can be seen that the back, seat, legs, and foot sections 34, 38, 42, 46 of the patient support body 32 define a transition position between the sitting position and the platform position, that is, the front end 22 of the seat section 38 Above the rear end 24 of the seat section 38, as shown in FIG. When the patient support body 32 is in the transition position, the control board 110 generally extends downward from the axis 68, as shown in FIG. 10.

When the back, seat, legs, and foot sections 34, 38, 42, 46 are locked in the platform position of FIG. 11, the control board 110 is in a second position extending forward from the axis 68, and the caregiver can release the locking mechanism 210 And with respect to the seat section 38, the back section 34 is pulled upward along the axis 250, pulled away from the floor 62 in the direction of the arrow 227 shown in FIG. 11, passed through the transition position in FIG. 10, and pulled back to the sitting position in FIG.

The chair stop link 228 includes a front portion 260 that extends substantially forward from the pin 256. As shown in FIGS. 9 and 10, the front portion 260 has a front edge 267 and a locking edge 268 adjacent to the front edge 267. The locking edge 268 defines a notch 264. A stop bolt 266 is fixed to the control board 110. When the back section 34 is in the sitting position shown in FIG. The continuous rotation prevents the back section 34 from moving forward through the sitting position. When the back section 34 and the seat section 38 are in the platform position shown in FIG. 11, the front edge 267 is joined to a bottom surface 39 of the seat section 38 to prevent the control board 110 from continuously rotating in the direction 102 and thereby prevent the back section 34 Move down over the platform position.

As described above, the leg configuration assembly 200 of the assembly 100 controls the movement of the leg section 42 and the foot section 46 relative to the seat section 38, as shown in FIGS. 9-11. The handle 76 is connected to the leg configuration assembly 200 so that the handle 76 moves the leg section 42 and the foot section 46 between the storage position and the extended position, as shown in FIGS. 1 and 2. In addition, the leg configuration assembly 200 is pivotally connected to the control board 110, so that the rotation of the control board 110 along the axis 68 can move the leg section 42 and the foot section 46 between the extended position and the platform position, as shown in Figure 9-11. Show.

The leg configuration assembly 200 includes a handle assembly 348, which includes a handle 76 and a component that connects the handle 76 to the leg section 42, as shown in FIG. 12. The leg configuration assembly 200 also includes a clutch assembly 347, which connects the control board 110 to the handle assembly 348, and allows the handle 76 to move when the handle 76 is used to move the leg section 42 between the storage position and the extended position , And nothing about the control board 110. A pivot shaft 298 with a non-circular cross-section is connected to the handle assembly 348, so that the movement of the handle 76 along the axis 78 allows the shaft 298 to rotate along the axis 78 defined by the shaft 298, as shown in FIGS. 1-8 and 12. In addition, the pivot 298 connects the handle assembly 348 to the clutch assembly 347, connects the leg section 42 to the seat section 40, and connects the leg configuration assembly 200 to the leg configuration assembly 201, as shown in FIG.

An elongated configuration link 270 is connected to the control panel 110 to the leg frame 290 via an alignment link 272 and a leg link 278. As shown in Figures 9-11, the link 270 uses a pivot pin 284 and At its rear end 24, it is pivotally connected to the control board 110, and approximately extends forward from the control board 110 to its front end 22, which is pivotally connected to the alignment link 272, as shown in FIG. 12. The alignment link 272 extends from the front end of the configuration link 270 and is pivotally connected to a middle section of the leg link 278, as shown in FIGS. 7-12.

The leg connecting rods 278 of the leg arrangement assemblies 200 and 201 each constitute the attachment plate 318 shown in Figs. Each side member 292 is attached to one of the attachment plates 318 to connect the frame body 290 to the link mechanism assembly 200, so that the movement of the leg link 278 causes the leg 42 to move.

The leg configuration assembly 200 also includes a driven link 274 with a first end 273. The first end is configured to include a square hole 312 for receiving a square hub 344 of a clutch inner disc 342 of the clutch assembly 347. As shown in FIG. 12, the inner disc 342 includes a non-circular hole 346, and the shaft 298 is drivably received, so that the rotation of the shaft 298 causes the inner disc 342 and the driven connecting rod 274 to rotate. The shaft 298 has a hexagonal cross-section and the hole 346 has a corresponding hexagonal shape. However, within the scope of the present invention, it is provided that the hole 346 and the shaft 298 have any non-circular cross-section so that the inner disc 342 rotates with the shaft 298.

The leg link 278 includes a first end 277 with a square hole 296 that can accommodate the square hub 338 of the clutch outer disc 336 of the clutch assembly 347. As shown in FIG. 12, the outer disc 336 is configured to include An "excessively large" hole 340 is used to accommodate the pivot 298 so that the pivot 298 can rotate relative to the outer disc 336 and the leg link 278. The inner disc 342 and the outer disc 336 are positioned between the leg link 278 and the driven link 274, as shown in FIG. , The inner disc 342, and the driven link 274 are rotatable relative to the outer disc 336, the leg link 278, the frame body 290, and the leg 42.

A connecting link 276 of the leg configuration assembly 200 is pivotally connected to a second end 275 of the driven link 274 as shown in FIGS. 7-11, and extends from the driven link 274 to the foot link 280, the foot section The connecting rod 280 has a first end and is pivotally connected to a flange 314 fixed to the central member 294 of the leg section frame 290 to facilitate pivoting along a leg section axis 316, and a second end mounted on the leg section 46 , So that the foot section 46 can pivot relative to the leg section 42 according to the foot section axis 316.

A slotted link 282 connects the alignment link 272 to the driven link 274. As shown in FIG. 12, a first end 281 of the slotted link 282 can be at a position spaced apart from the second square hole 312 It is pivotally connected to the driven link 274, as shown in FIGS. 7 and 12. The elongated hole connecting rod 282 includes a top edge 319 which is fitted with a bottom edge 321 to define an elongated hole 320 adjacent to the second end 283 of the elongated hole connecting rod 282, and a pin 322 is cantilevered from the alignment connecting rod 272 In addition, the elongated hole 320 is accommodated for sliding and pivoting, so that the elongated hole link 282 and the driven link 274 can slide and pivot relative to the alignment link 272.

When the leg section 22 and the foot section 46 are in the storage position and the back section 34 and the seat section 38 are locked in the sitting position, the handle 76 can be retracted according to the axis 78 to manually pivot to the extended position, and when the handle 76 When pivoting, the shaft 298, the inner disc 342, and the driven link 274 rotate according to the pivot axis 78, and the leg link 278, the leg bracket 290, and the leg 42 are also caused by the inner disc 342 and the outer disc. The transmission of the piece 336 is combined to pivot along the axis 78. In addition, when the leg link 278 moves forward and upward, the leg link 278 causes the alignment link 272 to pivot forward from the substantially vertical position shown in FIG. 8 on a pivot axis 288 relative to the configuration link 270. To the approximately horizontal position shown in FIG. 9 to be aligned with the configuration connecting rod 270.

During the forward pivoting of the alignment link 272, the pin 322 of the alignment link 272 slides away from the edge 319 of the slotted link 282 and toward the edge 321 in the slot 320, and the axis 288 of the alignment link is as shown in the figure The ascending position shown in 8 moves downward to the descending position shown in FIG. Therefore, when the leg section 42 and the leg section link 278 pivot forward and upward along the axis 78, the alignment link 272 and the configuration link 270 are opened from the angled structure shown in FIG. 8 to roughly as shown in FIG. Linear structure.

When the alignment link 272 and the configuration link 270 reach the online position, a stop bolt 300 overhanging the alignment link 272 is combined with a barb 310 overhanging the front end 22 of the configuration link 270, as shown in FIG. 9 , The combination of the stop bolt 300 and the barb 310 can prevent the alignment link 272 from further pivoting upward along the axis 288 relative to the configuration link 270, so that when the back section 34 and the seat section 38 are in the sitting position, The leg section 42 is prevented from moving upward past the extended position. It can be seen that when the alignment link 272 and the configuration link 270 are in a linear structure, there will be an "over-center state", that is, when the leg section 42 is in the extended position, the alignment link 272 will cooperate with the configuration link 270 to lock The leg configuration assembly 200 prevents the leg section 42 from moving downward.

As described above, when the leg section 42 is moved from the storage position to the extended position, the inner disc 342 is coupled to the outer disc 336 in a transmission manner, so that the outer disc 336, the leg link 278, and the leg section 42 are connected to each other. And move with the inner disc 342 and the driven link 274. However, the outer disc 336 includes a stop surface 341 and an inclined surface 343 defining an arc-shaped recess 337. A drive pin 335 is suspended from the inner disc 342 and extends into the recess 337 of the outer disc 336, such as Shown in Figure 12. During the initial movement of the handle 76 from the retracted position to the extended position, the inner disc 342 and the outer disc 336 are connected together in a transmission manner, and during the subsequent movement of the handle 76 to the extended position, the inner disc 342 moves And nothing about the outer disc 336. As a result, the movement of the legs and foot sections 42, 46 from the storage position to the extended position will occur in two stages. During the first stage, the foot section 46 and the leg section 42 move together until the leg section reaches its extended position, allowing The foot section 46 "clears" the floor 62; during the second stage, the foot section 46 moves relative to the leg section 42 and straightens from below the leg section 42 until the feet and the leg sections 46, 42 are substantially in the same plane in the extended position.

When the leg section 42 is in the storage position, the drive pin 335 is combined with the stop surface 341 of the outer disc 336, and when the handle 76 pivots in the direction 302 to move the leg section 42 from the storage position to the extended position, a roll The spring 345 wound around the pivot 298 and compressed between the seat frame member 224 and the driven link 274 passes through the driven link 274 to push the inner disc 342 in the axial direction to be coupled to the outer disc 336, It is prevented from axial movement by the leg link 278, so that the drive pin 335 of the inner disc 342 is combined with the inclined surface 343 of the outer disc 336, and the outer disc 336 and the inner disc 342 are combined with sufficient force. Rotating along the axis 78 through equal angular displacements causes the foot section 46 and the leg section 42 to pivot together. Therefore, when the leg section 42 reaches its extended position first, the foot section 46 is still curved under the leg section 42.

When the leg section 42 reaches its extended position, the configuration link 270 and the alignment link 272 are in a linear structure to prevent the leg section link 278 from pivoting through the extension when the back section 34 and the seat section 38 are in the sitting position. Go out of position and move towards the platform position, as described earlier. The continuous movement of the handle 76 toward the extended position can cause the shaft 298, the inner disc 342, and the driven link 274 to rotate along the axis 78, regardless of whether the connecting rods 270, 272 prevent the outer disc 336, The leg section connecting rod 278, and the leg section 42. The driving link 274 pushes the connecting link 276 and the connecting link 276 pushes the foot section link 280, so that the foot section link 280 and the foot section 46 pivot relative to the leg section 42 until the foot section 46 is substantially in the same plane as the leg section 42 .

When the leg section 46 independently moves to the same plane as the leg section 42, the shaft 298 rotates relative to the outer disc 336 and the leg section link 278 in the oversized hole 340. In addition, the driving pin 335 is separated from the stop surface 341 and straddles the inclined surface 343 to move out of the recess 337, which causes the inner disc 342 and the end 273 of the driven link 274 to move axially along the axis 78 toward the seat section. The frame member 224 further compresses the spring 345. The handle 76 can be used to rotate the shaft 298, the inner disc 342, and the driven link 274 relative to the outer disc 336 and the leg link 278 until the second end 275 of the driven link is coupled to the plate 318, as shown in FIG. As shown in 9-11, the handle 76 is now in the extended position and the foot section 46 and the leg section 42 are in the same plane.

When the leg section 42 and the foot section 46 are in the extended position, the handle 76 can be manually pivoted from the extended position to the retracted position along the axis 78 to move the leg section 42 and the foot section 46 from the extended position to the storage position , The handle 76 moves in this manner to rotate the shaft 298, the inner disc 342, and the driven link 274 in the counterclockwise direction 304 along the axis 78, as shown in FIGS. 9-11. The movement of the driven link 274 in the direction 304 can pull the slotted link 282 upward, and when the slotted link 282 moves upward, the bottom edge 321 of the slotted link 282 is coupled to the slotted pin 322 And move the long hole lock 322 upward, so that the alignment link 272 and the configuration link 270 are moved from the linear structure to the angle structure, thereby moving the alignment link 272 and the configuration link 270 upward on the axis 288.

The remaining movement of the leg section 42, the foot section 46, and the leg configuration assembly 200 to the storage position is similar but opposite to the aforementioned movement of the leg section 42, the foot section 46, and the leg configuration assembly 200 from the storage position to the extended position For example, when the assembly 200 moves to the storage position, the alignment link 272 is relative to the configuration link 270 and pivots backward and downward from the generally horizontal position to the generally vertical position according to the axis 288, and the alignment link 272 and the configuration The upward movement of the link 270 at the axis 288 will pivot the leg link 278 relative to the seat section 40 along the axis 78.

Once the leg section 42 and the foot section 46 move to the extended position, the legs and the foot section 42, 46 can use the axis 250 to pivot the back section 34 down to the floor 62 to move to the platform position, as shown in Figure 9-11. It is shown that moving from the sitting position to the platform position, the movement of the back section 34 from the sitting position to the platform position can cause the control board 110 to rotate in the direction 102 along the axis 68 from its first orientation.

When the control board 110 rotates along the axis 68 in the direction 102, the pin 284 connecting the configuration link 270 to the control board 110 moves along the axis and pushes the configuration link 270 downward, as shown in FIG. 9. When the legs and foot sections 42, 46 are in the extended position, since the alignment link 272 and the configuration link 270 are in a linear structure, the alignment link 272 is pushed substantially forward.

The forward movement of the alignment link 272 can pivot the leg link 278 in the direction 302 along the axis 78, as shown in FIGS. 9 and 10, the forward movement of the alignment link 272 is also connected to the connection through the foot link 280 The operation of the lever 276 pivots along the axis 78 in the direction 302. Therefore, when the legs and foot sections 42, 46 are in the extended position, the control board 110 moves from the first orientation shown in FIG. 9 through the transition orientation shown in FIG. 10 to the second orientation shown in FIG. The foot sections 42, 46 are moved from the extended position in FIG. 9 through the transition position in FIG. 10 to the platform position in FIG. 11.

When the second end 275 of the driven link 274 is coupled to the attachment plate 318, it occurs when the leg section 42 and the foot section 46 are in the extended position, and all positions between the extended position and the platform position maintain the legs When the supporting surface 44 and the foot supporting surface 48 are aligned on the same plane, the driven link 274 and the leg link 278 pivot together along the axis 78 at this time. Therefore, when the leg section 42 and the foot section 46 move between the extended and platform positions, the inner disc 342 and the outer disc 336 rotate together along the axis 78 without any relative movement therebetween. As a result, when the legs and foot sections are in the extended position and the back section 34 is moved to the platform position, the handle 76 automatically moves from the extended position to the lowered position.

When the foot section 46 and the leg section 42 are in the extended position, the platform position, and the position therebetween, gravity will force the foot section 46 and the foot section link 280 to pivot downward relative to the leg section 42 along the axis 316. However, the combination of the second end 275 of the driven link 274 and the attachment plate 318 can prevent this movement. Therefore, when the foot section 46 and the leg section 42 are in the extended position, the platform position, or any position in between, the driven The connecting rod 274 is coupled to the attachment plate 318 to lock the foot support surface 48 to the leg support surface 44 in the same plane relationship.

When the leg section 42 and the foot section 46 are in the platform position, the back section 34 can swing upward from the platform position to the sitting position along the axis 250. When the back section 34 swings to the sitting position, the control panel 110 is in the direction 104 When turning from the second position to the first position, pull the configuration link 270 and the alignment link 272 roughly backward to move the leg section 42 and the foot section 46 from the platform position to the extended position, as shown in FIG. 10. The movement of the leg section 42, the foot section 46, and the leg configuration assembly 200 from the platform position to the extended position is similar but opposite to that of the leg section 42, the foot section 46, and the leg configuration assembly 200 from the extended position to the platform position. The aforementioned move.

As shown in Fig. 5, the handle 76 can be disengaged from the clutch assembly 347 and pivoted along the axis 78 to a lowered position below the seat support surface 40, so that the caregiver can easily slide the patient supported by the chair 20 out of the patient Support surface 30 without interference from handle 76. The handle assembly 348 allows the handle 76 to be axially pulled outwards along the axis 78 toward the transmission state to be separated from the disengaged state of the leg configuration assemblies 200 and 201, so that the rotation of the handle 76 along the axis 78 does not affect the leg section 42 and the foot section. 46's location.

The handle assembly 348 includes a coupling tube 350 fastened to the handle 76 and extending inwardly therefrom. A shaft end cap 352 includes a rod 354 accommodated in the tube 350 and a coupling tube 356 suspended on the rod 354. The barrel 356 includes a hexagonal hole 358, which can accommodate the shaft 298 in a transmission manner. As shown in FIG.

The cover 352 is composed of a ring 360 suspended on the rod 254 and adjacent to the shoulder 362 defined by an outer end surface 364 of the cylinder 356. The ring 360 is composed of a notch 366, and a compression spring 368 is mounted on On the rod 354 in the tube 350, a ring 363 installed on the end of the rod 354 adjacent to the handle 76 is bent and pressed away from an inner shoulder (not shown in the figure) of the tube 350, so that the ring 363 is bent toward The outer side contacts a C-shaped ring 365 received in a ring side groove 355 formed in the outer end of the rod 354. The C-shaped ring 365 can prevent the end ring 363 from being pushed out of the rod 354. The spring 368 also bends the handle 76 and the tube 350 toward the shoulder 362 of the barrel 356.

One of the inner ends of the tube 350 includes an annular groove 361 and a lug 367. When the lug 367 is aligned with the groove 366, the spring 368 presses the lug 367 into the groove 366 to make the ring 360 of the rod 354 It is received by the groove 361 of the tube 350 and an inner end surface 351 of the tube 350 is in contact with the shoulder 362 of the barrel 356. When the lug 367 is received by the notch 366 and the inner end surface 351 is connected to the shoulder 362, the lug 367 is connected to the ring 360 in a driving manner and the rotation of the handle 76 along the axis 78 will rotate the tube 350 to rotate the ring 360 and thereby The cover 352 and the shaft 298 are rotated along the axis 78.

When the handle 76 is pulled outward in the axial direction to make the inner end surface 351 free from the shoulder 362, the spring 268 is further compressed and the lug 367 is separated from the groove 366 and separated from the ring 360. When the lug 367 is separated from the ring 360, the handle Rotation of 76 on axis 78 will cause tube 350 to rotate on axis 78 relative to rod 354. When the lug 367 is not aligned with the notch 366 and the handle 76 is released, the spring 368 presses the inner end surface 369 of the lug 367 against the outer end surface 359 of the ring 360, so that the handle 76 is separated from the clutch assembly 347 and can be The axis 78 rotates to a position below the patient support surface 32 without moving the leg and foot sections 42, 46.

As mentioned above, the chair 20 includes a first arm rest assembly 50 installed on the first side 26 of the chair 20 and a second arm rest assembly 50 installed on the second side 28 of the reclining tool 20, as shown in Figure 1 As shown in -6 and 13, each arm rest assembly 50 includes an arm rest 52 with an upper arm supporting surface 74 and an arm rest 52 that is released to move up and down relative to the seat section 38 Pieces of release handle 72. The following description about the arm rest assembly 50 installed on the first side 26 of the chair 20 and the one shown in FIG. 13 is also applicable to the arm rest assembly 50 installed on the second side 28 of the chair 20, unless otherwise Specify.

The arm rest assembly 50 includes a plate 370 extending substantially downward from the arm rest 52. As shown in FIG. 13, the arm rest assembly 50 also includes a bottom shell 376, which has an inner shell 375 to cooperate with An outer shell 377 defines an inner region 379 containing plate 370, the outer shell 377 is installed on the inner shell 375, and the inner shell 375 is installed on a side of the seat section 38 by a mounting frame 378.

A rear-facing front rail bar 380 is suspended from a front wall 384 of the inner shell 375, and a front-facing rear rail bar 382 is suspended from a rear wall 386 of the inner shell 375, as shown in FIG. The front end 22 of the plate 370 constitutes a front rail 372 and the rear end 24 of the plate 370 constitutes a rear rail 374. The front and rear rail bars 380, 382 are respectively received by the front and rear rails 372, 374 and guided by cooperation with them. The plate 370 and the arm supporting member 52 move up and down relative to the bottom housing 376 and the seat section 38.

The arm rest assembly 50 additionally includes a locking mechanism 388 that can prevent the arm rest 52 and the plate 370 from moving relative to the bottom housing 376 and the seat section 38 in a locking position, and allows the arm rest 52 and the plate 370 to move. Relative to the bottom shell 376 and the seat section 38 move between the release position. The locking mechanism 388 includes a spring clutch, which has a clutch housing 392 and a rod 394 accommodated by the clutch housing 392 to facilitate sliding movement. The rod 394 is mounted on an inner wall 385 of the inner housing 375 by a rod bracket 396 As shown in FIG. 13, the clutch housing 392 is installed on the outer surface 371 of one of the plates 370 and the rod 394 is accommodated by the clutch housing 392. The spring clutch is connected to the arm rest release lever 72 by an arc-shaped cable 398, which has a flexible control wire (not shown in the figure) covered by a sheath. Although the locking mechanism 388 includes a spring clutch, within the scope of the present invention, the locking mechanism 388 includes any of the aforementioned locking mechanisms with reference to the locking mechanism 180, and can suitably lock the arm rest 52 relative to the seat section 38.

When the arm rest release handle 72 is in the downward locking position, the locking mechanism 388 is locked to prevent the lever 394 from sliding relative to the clutch housing 392, and to prevent the locking plate 370 and the arm rest 52 from sliding relative to the bottom housing 376 Sliding, thereby preventing the arm rest 52 and the plate 370 from moving up and down relative to the bottom shell 376 and the seat section 38. When the caregiver moves the arm release handle 72 to the upward release position, the control line of the arc cable 398 moves the locking mechanism 388 to the release position, so that the rod 394 can slide relative to the clutch housing 392 and the plate 370, and the arm rests The setting member 52 can move up and down relative to the bottom housing 376 and the seat section 38.

A plate cover 399 is attached to the plate 370 so that the clutch housing 392 can be seen and covered between the plate 370 and the plate cover 399. The plate cover 399 and the plate 370 are positioned on the inner shell 375 and the outer shell 377 of the bottom shell 376 In between, when the arm supporting member 52 is raised and lowered relative to the seat section 38, the plate cover 399 and the plate 370 can extend into and out of the bottom shell 376.

Another example of the movable care chair 400 includes an articulated patient support 420, as shown in FIG. 14, on which a patient (not shown) can lie on. The patient support body 420 includes a back section 422 with a back support surface 424, a seat section 426 with a seat support surface 428, and a leg section 430 with a leg support surface 432, as shown in FIGS. 14-16, the back The supporting surface 424 cooperates with the seat supporting surface 428 and the leg supporting surface 432 to define a patient supporting surface 418.

The chair 400 has a front end 410, a back end 412, a first side 414, and a second side 416. Since this article refers to the second example of the movable care chair 400 for illustration, the "front end 410" is The term refers to the end of any reference object closest to the front end 410 of the chair 400, and "rear end 412" refers to the end of any reference object closest to the back 412 of the chair 400.

The chair 400 includes spaced first and second arm rest assemblies 434, which are respectively mounted on the first side 414 and the second side 416 of the chair 400, as shown in FIG. Each arm rest assembly 434 includes an arm rest 436, which defines an arm support surface 454 that is generally horizontal and faces upwards, on which the arm of the person carried by the chair 400 can rest.

The chair 400 includes a base frame 438 shown in FIGS. 14-16. The front casters 58 and the rear casters 60 are mounted on the base frame 438 so that the chair 400 can roll on the floor 62. The base frame 438 is shielded by the side plate 56, and the articulated patient support body 420 is supported above the base frame 438, and the front and rear casters 58, 60 can swing freely according to a vertical axis.

A leaning handle 450 is installed on one of the arm rest assembly 434, the leaning handle 450 is pivotally connected to the arm rest assembly 450 at a position below the arm rest 436, and extends forward therefrom, as shown in FIG. 14 As shown, in order to facilitate an upward release position that allows the back, seat, and leg sections 422, 426, 430 to move relative to each other, and a lock back, seat, and leg sections 422, 426, 430 so that the back seat, leg sections 422, 426, 430 Moving between the downwardly locked positions that are relatively fixed to each other, the leaning handle 450 is biased toward the locked position.

The movement of the leaning handle 450 to the release position allows the back, seat, and leg sections 422, 426, 430 to move between the sitting position shown in FIG. 14 and the platform position shown in FIG. 16. In the sitting position, the seat section 426 is generally horizontal, with the seat supporting surface 428 facing upward, and the back section 422 extends upward from the rear end 412 of the seat section 426, so that the back supporting surface 424 generally faces the front end 410 of the chair 400, and The leg section 430 extends downward from the front end 410 of the seat section 426, so that the leg support surface 432 is generally forwardly facing the front end 410 of the chair 400, as shown in FIG. In the platform position, the back, seat, and leg sections 422, 426, and 430 are roughly aligned, so that the back support surface 424, the seat support surface 428, and the leg support surface 432 are generally upward, which are roughly in the same plane as shown in Figure 16. . When the back, seat, and leg sections 422, 426, 430 are in the required position between the sitting position and the platform position, the back, seat, and leg sections 422, 426, 430 can be locked in by moving the release handle 450 to the locked position An infinite number of positions between the sitting position and the platform position.

The leg section 430 includes a leg section frame 781 having a ring 783 and a pillar 780, and a cushion assembly pivotally connected to the frame body 781 to move between the closed position shown in FIG. 14 and the foot rest position shown in FIG. 15 435. When the back, seat, and leg sections 422, 426, 430 are in the sitting position, the cushion assembly 435 can pivot downward from the frame body 781 to the foot rest position along an axis 429, so that one of the cushion assemblies 435 is a back plate The foot supporting surface 433 of one of 427 is exposed. In the footrest position, the leg support surface 432 is generally downward facing the floor 62 and the foot support surface 433 is generally facing upward to keep the feet of the person on the chair 400 away from the floor 62.

The cushion assembly 435 is supported at the foot rest position by a pair of cables 431 connecting the back plate 427 to the support 780 of the frame body 781, as shown in FIG. 15. When the cushion assembly 435 pivots upward from the foot rest position to the closed position along the axis 429, a bolt 458 installed at the top of the center of the ring 781 grabs one of the bolt plates of the cushion assembly 435 attached to the back plate 427 459, and the buffer assembly 435 is locked in the closed position. When the cushion assembly 435 is in the closed position, the back plate 427 rests against a cover plate 457, which can cover part of the base frame 438 and prevent foreign objects from being accidentally inserted under the seat section 426 from the front end 410 of the chair 400 .

A back cover 445 is installed on the back section 422 and the back cover 445 constitutes a recess 447, a part of which is covered with a net 449 to provide a storage compartment for objects (not shown) to be stored with the chair 400 And shipping. A push rod 442 has a generally horizontal handle 443, which is mounted on the back section 422, and the first and second forward tilt handles 444 are pivotally connected to the push rod 442 and adjacent to the first side 414 of the chair 400 With the second side 416, as shown in FIG. 14, in addition, a U-shaped rearwardly inclined handle 446 is installed on the back section 422 and adjacent to the top of the push rod 442.

The tilt handles 444, 446 can each move between a locked position and a release position. The movement of the tilt handle 444 forward to the release position allows the patient support 420 to tilt forward along a horizontal horizontal pivot axis 448, and The movement of the tilt handle 446 backward to the release position allows the patient support 420 to tilt backward along the axis 448.

After the text, the components of the chair 420 are tilted "forward" when each reference component rotates along an axis to cause the front end 410 of the component to descend and the rear end 412 of the component rises. Similarly, the components of the chair 420 rotate on an axis when each reference component When the component end 412 is lowered and the front end 410 of the component is raised, it is tilted "backward". When the back, seat, and leg sections 422, 426, 430 are locked in the sitting position, the platform position, or any position in between, the patient support 420 can be tilted forward and backward.

When the back, seat, and leg sections 422, 426, and 430 of the chair 400 are locked in the sitting position, the patient support 420 can be placed in a roughly horizontal "in-situ" position, that is, tilt forward from the original position to the Move forward out of the standing position, and tilt backward to a tilted back position. In addition, when the back, seat, and leg sections 422, 426, 430 are locked in the platform position, the patient support 420 can be placed in a roughly horizontal "in-situ" position, that is, tilted forward from the original position to a reversed pan. The Tandland Fort position, and tilted back from the original position to a Tandland Fort position.

An arm rest release handle 452 is installed on each arm rest assembly 434, as shown in Figures 14 and 24, each release handle 452 is attached to an upward release position that allows the arm rest 436 to move vertically relative to the seat section 426 Moving between a downward locking position of the locking arm rest 436 relative to the seat section 426, each release handle 452 is biased toward the locking position.

The movement of the release handle 452 from the locked position to the released position allows the corresponding arm rest 436 to move between a raised position and a lowered position. In the raised position, the arm rest 436 rises above the seat section 426, and in the lowered position, the arm rest 436 is adjacent to the seat section 426, so that the arm supporting surface 454 of each arm rest 436 is approximately the same as the seat The supporting surface 428 is the same plane.

Each arm rest 436 can be locked in between the raised position and the lowered position by moving the corresponding release handle 452 to the locked position when the selected arm rest 436 is located at the required position between the upwardly ascending position and the downwardly descending position. Infinite locations in between. Although the arm rest 436 is adjacent to the seat section 426 in the lowered position, so that each arm support surface 454 is approximately the same plane as the seat support surface 428, an arm rest assembly 434 is provided within the scope of the present invention. The arm supporting surface 454 can be vertically located below the horizontal plane where the seat supporting surface 428 is located when the arm rest 436 is in the lowered position .

The chair 400 also includes a pair of brake-operating pedal wings 456, which are pivotally connected to the base frame 438, as shown in Figures 14 and 15, the pedal wings 456 are fixed to a bell-shaped brake-operating shaft 460, which is mounted on the base frame 438 rotates along a pivot axis 462 extending laterally. The shaft 460 is connected to the rear casters 60 and to a center wheel 82, so that the movement of the pedal wing 456 can control the braking and release of the rear casters 60, and control the center wheel 82 to a downward braking-manipulation position when it contacts the floor 62. Move between neutral positions spaced from the floor 62.

When the pedal 456 is tilted backward to the braking position shown in FIG. 16, the rear caster 60 is turned to prevent the rear caster 60 from rotating or swinging. In addition, the center wheel 82 moves to the braking-manipulation position that touches the floor 62 to assist in preventing The caster 60 pivots after the chair 400 is rotated by any one of the switches. When the pedal wing 456 moves to the substantially horizontal neutral position, the rear caster 60 no longer rotates, so the rear caster 60 can rotate and the center wheel 82 moves to the neutral position separated from the floor 62. Finally, when the pedal wing 456 is tilted forward to the operating position shown in Figures 14 and 15, the rear caster 60 can rotate and the center wheel 82 moves back to the brake-operating position contacting the floor 62, thereby providing a friction with the floor 62 The contact is used to assist the manipulation of the chair 20 for easy manipulation of the chair 400.

The pump pedal 464 is pivoted on each side 414, 416 of the chair 400 to control the ascent and descent of the patient support 420 relative to the floor 62. The pump pedal 464 is normally located as shown in Figs. 14-16 The intermediate locking position, that is, the patient support body 420 is locked vertically with respect to the floor 62. The pump pedal 464 can be moved up to an upward release position (not shown in the figure) to release the patient support 420 relative to the floor 62 and lower the patient support 420 relative to the floor 62. In addition, the pump pedal 464 can move down from the locked position to a downward pumping position through the stroke of the pump, and can "pump" to make the pump pedal 464 reciprocate between the locked position and the pumping position. The patient support body 420 is raised relative to the floor 62.

Therefore, the chair 400 includes an articulated patient support 420, which has a back, a seat, and leg sections 422, 426, 430, which can be in the sitting position shown in Figures 14, 15, 21 and the platform position shown in Figures 16, 23 Move and lock between. In addition, the patient support body 420 can be tilted forwards and backwards along the axis 448 when the back, seat, and leg sections 422, 426, 430 are locked in the sitting position, the platform position, or any position in between. Furthermore, the patient support body 420 can be raised and lowered relative to the floor 62; in addition, the chair 400 includes a central wheel 82 that can move to contact and disengage from the floor 62 and an arm rest assembly 434 with an arm rest 436 , The arm rests can be locked at an infinite number of positions between the upwardly ascending position and the downwardly descending position.

The base frame 438 of the chair 400 includes a bottom frame 492 with casters 58, 60 contacting the floor 62, a step frame 466, and a step frame 466 installed above the bottom frame 492 to move it upward and downward. The ascending mechanism 496, as shown in Figs. 15 and 16, enables the stage frame 466 to rise and descend relative to the floor 62. A middle frame 468 is pivotally connected to the level frame 466 to facilitate forward and backward leaning between a forward tilt position and a backward tilt position according to the horizontal axis 448. A control link assembly 470 (hereinafter referred to as the total Step 470) is carried by the middle frame 468, and connects the patient support body 420 to the middle frame 468. The assembly 470 controls the pivotal movement of the back, seat, and leg sections 422, 426, and 430 relative to the middle frame 468. Therefore, the sections 422, 426, and 430 of the patient support body 420 can interact with each other due to the movement of the assembly 470. Relatively moving, the patient support body 420 is inclined with respect to the floor 62 by the middle frame 468, and the patient support body 420 is raised and lowered with respect to the floor 62 by the step frame 466.

The bottom frame 492 of the chair 400 is substantially similar to the bottom frame 92 of the aforementioned chair 20 shown in FIG. Shown. Each side member 512, 514 includes an upwardly extending front tube 124 provided at the front end 410 of the side members 512, 514 and an upwardly extending rear tube 126 provided at the rear end 412 of the side members 512, 514. Casters 58 are mounted on the front tube 124 and The caster 60 is installed on the rear tube 126.

The brake-operating shaft 460 is received by the hole 128 to rotate relative to the base frame 492. As shown in FIG. The pedal wing 456 is fixed to and extends from the shaft 460 between the tie tube 126 and extends rearward, so that the shaft 460 can be rotated relative to the axis 462 by pivoting the pedal wing 456 along the axis 462. Each pedal wing 456 includes a braking surface 493 facing generally upward, and the shaft 460 includes a bell-shaped operating portion 494 that is offset from the axis 462, as shown in FIGS. 14 and 15.

Applying a contact force to the braking surface 493 of any pedal wing 456 can cause the shaft 460 to rotate along the axis 462 in the braking direction 497 shown in FIG. 16 until the shaft 460 and the pedal wing 456 reach the braking position. Applying a contact force to the manipulation portion 494 of the shaft 460 can make the shaft 460 rotate along the axis 462 in the manipulation direction 498 shown in FIG. 16 until the shaft 460 and the pedal wing 456 reach the manipulation position.

The shaft 460 is connected to each rear caster 60 by a brake mechanism (not shown in the figure) well-known to those accustomed to this technique. When the shaft 460 is in the braking position, the brake mechanism will turn the rear caster 60 and prevent the rear caster 60 from rotating. . When the shaft 460 is in the manipulation position, the brake mechanism allows the rear casters 60 to rotate freely.

The center wheel arrangement assembly 138 connects the shaft 460 to the center wheel 82, so that the rotation of the shaft 460 along the axis 462 can move the center wheel 82 relative to the floor 62 between the neutral position and the brake-operating position. The center wheel configuration assembly 138 includes a pivot rod 140 attached to the shaft 460, and a long fork member 142, which connects the pivot rod 140 to the center wheel 82, as shown in FIGS. 27 to give a detailed description.

The ascending mechanism 496 includes a first and two spaced-apart scissor linkage mechanisms 476. As shown in Figs. Scissor linkage mechanisms 476. Each scissor linkage mechanism 476 is installed on the base frame 492 to facilitate movement relative to the base frame 492 between an upwardly open position and a downwardly closed position. A driving mechanism 114 is connected to the bottom frame 492 and the cross member 480 for moving the scissor linkage mechanism 476, and thus moves the step frame 466, the middle frame 468, and the patient support body relative to the bottom frame 492 and the floor 62 420 up and down.

Each scissor link mechanism 476 includes a plurality of links 516, as shown in FIG. 16, the middle section of one link 516 is pivotally connected to the middle section of the other link 516 by a central pin 517 to form a cross link The rod pair 516, the end of each link 516 of each cross link pair 516 uses an end pin 518 to pivot to the end of each link 516 of the next adjacent cross link pair 516, so that the cross link pair 516 They are stacked in the vertical direction and have respective central pins 517 aligned in the vertical direction. The scissor linkage mechanism 476 shown each includes a two-stage vertical overlapping cross link pair 516, but within the scope of the present invention, the scissor linkage mechanism 476 can be provided with a different number of vertical overlapping cross link pairs 516 Therefore, the "scissor-type ascending linkage mechanism" and "scissor-type linkage mechanism" used in this article and the scope of application include at least two linkages 516 connected by a central pin 517.

A flange 520 is suspended downward from the side members 512 and 514 of the base frame 492 and is close to the rear member 148, as shown in FIGS. 15 and 16. A bottom pivot pin 522 connects each scissor linkage mechanism 476 to a respective linkage mechanism flange 520 so as to pivot relative to the base frame 492.

A bottom rail 524 extends downward from the side members 512, 514 of the bottom frame 492 close to the front member 146. Each bottom rail 524 includes a substantially horizontal rail plate 526, and a roller 528 is installed to rotate on each scissor connection. A front bottom end 530 of the lever mechanism 476 is coupled to the plate 526 of each bottom rail 524, as shown in FIG. 16. When the drive mechanism 114 opens the scissor link mechanism 476 to raise the step frame 466, the roller 528 rolls backward on the plate 526, and when the drive mechanism 114 closes the scissor link mechanism 476 to lower the step frame 466, the roller 528 Roll forward on the board 526.

The step frame 466 of the chair 400 includes a first side member 532 adjacent to the first side 414 of the chair 400, a second side member 534 adjacent to the second side 416 of the chair 400, and a connecting first and second sides The members 532, 534 and the front member 536 extend transversely therebetween, as shown in FIG. 15. A pivot pin 540 pivotally connects a rear top end 542 of each scissor linkage mechanism 476 to the respective side members 532 and 534 of the step frame 466.

Each of the side members 532 and 534 includes a top rail 544 with a horizontal rail plate 546. As shown in FIG. The plate 546 of the rail 544 is shown in FIG. 20. When the drive mechanism 114 opens the scissor link mechanism 476 to raise the step frame 466, the roller 548 rolls backward on the plate 546, and when the drive mechanism 114 closes the scissor link mechanism 476 to lower the step frame 466, the roller 548 rolls back on the plate 546. 548 rolls forward on the board 546.

Each pin 540 is aligned with a corresponding pin 522 in the vertical direction and corresponds to a corresponding roller 548 in the horizontal direction, as shown in FIG. 16. In addition, each roller 548 is vertically aligned with a corresponding roller 528. As a result, the stage frame 466 is still substantially horizontal when moving between the lifting positions relative to the base frame 492.

As mentioned above, it is certain that the driving mechanism 114 may include a variety of mechanical and electromechanical actuators and drivers to facilitate the lifting and lowering of the stage frame 466 relative to the base frame 492, which does not fall outside the scope of the present invention. The driving mechanism 114 of the chair 400 is a hydraulic cylinder 114, as shown in FIGS. 7 and 8.

The chair 400 includes a pump pedal arm 482, which is pivotally connected to a pump pedal 464 (not shown) as shown in FIGS. 15 and 16, so that the pump pedal 464 is between the locked position and the released position. Pivot between the locked position and the pumping position. Each pump pedal 464 includes a foot contact surface 486 facing upwards. The caregiver can apply a downward pumping force to the foot contact surface 486 of any pump pedal 464 to extend the pump pedal 464 in a lateral direction. The pivot axis 488 reciprocates upward and downward between the locked position and the pumping position.

Pumping the pump pedal 464 can pressurize the pump on the hydraulic fluid and force the hydraulic fluid to flow into the inner area of the hydraulic cylinder 114, thereby moving the step frame 466 upwards from the lowered position and toward the raised position relative to the underframe 492, as before Said. When the pump pedal 464 is lifted up through the locked position to the release position, the hydraulic fluid can be allowed to flow out of the inner area of the hydraulic cylinder 114, so that a piston 479 is retracted into the hydraulic cylinder 114 and the scissor linkage mechanism 476 is closed down to the closed position. On the bottom frame 492 to lower the step frame 466 to the lowered position.

The middle frame 468 includes a first side top post 556 and a second side top post 558, each of which includes a hole 560. The level frame 466 is equipped with an upwardly extending box body 552 attached to each side member of the level frame 466 532 and 534, as shown in FIG. 15, each box body 552 is configured to include a main hole 554.

The hole 554 and the hole 560 support the bearing 658 as shown in FIG. 20, and are roughly aligned to define a horizontal axis 448. A control shaft 562 is rotatably received by the holes 554 and 560, as shown in FIG. 15, so the middle frame 468 relative to the step frame 466 and pivots along the axis 448 between the forward tilt position shown in FIG. 19 and the backward tilt position shown in FIG. 18. The patient support body 420 is installed on the middle frame 468 so that the inclined middle frame 468 can be tilted between the front and rear inclined positions.

A locking mechanism 564 connects the middle frame 468 to the step frame 466. As shown in FIGS. 15-19, the locking mechanism 564 can be at a release position that allows the middle frame 468 to pivot relative to the step frame 466 on the pivot axis 448 and a prevention center. The frame 468 moves between the locked positions where the frame 466 moves relative to the step frame 466. The locking mechanism 564 can lock the middle frame 468 at an infinite number of positions relative to the step frame 466 between the forward tilt position and the backward tilt position.

The locking mechanism 564 includes a front air spring 566 and a rear air spring 568. As shown in FIGS. 15-19, the air springs 566 and 568 can be actuated and stopped to move the locking mechanism 564 between the locked and released positions. Although the locking mechanism 564 includes front and rear air springs 566, 568, the locking mechanisms 566, 568 within the scope of the present invention include any locking mechanism referenced to the locking mechanism 180, and can be locked and unlocked relative to the step frame 466 In the shelf 468.

The front air spring 566 includes a housing 563 and a piston 565 slidably received in the housing 563. As shown in FIGS. 17-19, the front air spring 566 can be locked to prevent the piston 565 from moving relative to the housing 563. This prevents the piston 565 from extending or retracting into the housing 563. Similarly, the rear air spring 568 includes a housing 567 and a piston 569 slidably received in the housing 567. The rear air spring 568 can be locked to prevent the piston 569 from moving relative to the housing 567, thereby preventing the piston 569 from extending. And or retract into the housing 567.

As shown in Figures 17-19, a first long hole plate 574 is installed adjacent to the first side member 532 of the step frame 466, and a second long hole plate 574 is installed on the step frame 466 and separated from the first long The hole plate 574 defines an air spring accommodating space 575 therebetween, as shown in FIG. 15. The front end 410 of each slotted plate 574 is attached to the front member 536 of the step frame 466, and the rear end 412 of each slotted plate 574 is attached to a laterally extending bracket 538 that overhangs to the first side member 532 of the step frame 466 , As shown in Figure 15. Each slotted plate 574 includes an outermost front edge 590 and an innermost front edge 592. The edges 590 and 592 define a front slot 576 and are adjacent to the front end 410 of each slotted plate 574. Each slotted plate 574 also includes an outermost rear edge 594 and an innermost rear edge 596. The edges 594 and 596 define a rear slot 586 and are adjacent to the rear end 412 of each slotted plate 574.

The rear end 412 of the housing 563 of the front air spring 566 is positioned in the air spring accommodating space 575 adjacent to the front end 410 of the elongated hole plate 574, and a pin 578 is fixed to the housing 563 and slidably received in the elongated hole 576 As shown in FIG. 15, the housing 563 can slide and pivot relative to the slotted plate 574. The rear housing 567 is also positioned in the air spring accommodating space 575 adjacent to the rear end 412 of the elongated hole plate 574. A pin 588 is fixed to the housing 567 and is slidably received in the elongated hole 586 so that the housing 567 is opposite to The slotted plate 574 slides and pivots.

The middle frame 468 includes a front pillar 572 and a flange 570 attached to the front pillar 572. As shown in FIGS. 15-19, the front end 410 of the front piston 565 is pivotally connected to the flange 570, thereby connecting the long hole The plate 574 and the stage frame 466 are connected to the middle frame 468. Similarly, the middle frame 468 includes a rear pillar 582 and a flange 580 attached to the rear pillar 582. The rear end 412 of the rear piston 569 is pivotally connected to the flange 580, thereby also connecting the slotted plate 574 with the step frame 466 is connected to the middle shelf 468.

When the middle frame 468 is in the roughly horizontal original position shown in FIG. 17, the front flange 570 is positioned in front of and above the front elongated hole 576, and the front end 410 of the gas spring 566 is positioned above the rear end 412 of the gas spring 566; In addition, the rear flange 580 is positioned behind and above the rear long hole 586, and the rear end 412 of the gas spring 568 is positioned above the front end 410 of the gas spring 568; in addition, the front long hole 576 is oriented so that the outermost edge 590 is positioned at The position above the innermost edge 592, and the rear long hole 586 faces so that the outermost edge 594 is positioned above the innermost edge 596.

Furthermore, when the middle frame 468 is in the original position, the air springs 566 and 568 are respectively fully extended relative to the housings 563 and 567. As shown in Figure 17, when the air springs 566 and 568 are therefore positioned and locked, the long holes The pin 578 is combined with the innermost edge 592 to prevent the middle frame 468 from tilting forward relative to the step frame 466, and the long hole pin 588 is combined with the innermost edge 596 to prevent the middle frame 468 from tilting backward relative to the step frame 466.

The air springs 566 and 568 can be bent and pressed to their locking mode, and can be selectively and independently released. When any one of the front and rear air springs 566, 568 is released, the middle frame 468 can move along the axis relative to the level frame 466 448 pivoting.

A first curved cable 620 has a sheath and a flexible control wire 624. The control wire can move in the sheath and is connected to the rear air spring 586, so the control wire 624 can be in the sheath relative to the air spring 568 Move to release the air spring 568 and allow the piston 569 to slide relative to the housing 567. The control wire 624 of the curved cable 620 is also attached to the inclined handle 446 after being installed on the back section 422, so that when the handle 446 is moved to the release position relative to the back section, the control wire 624 can be moved and the air spring 568 can be released. Similarly, a second curved cable 622 has a sheath and a flexible control wire 626 that can slide in the sheath. The control wire connects each forward tilt handle 444 to the front air spring 566, so when any forward tilt When the handle 444 moves to the release position relative to the push rod 442, the air spring 566 is released and the piston 565 can slide relative to the housing 563.

When the middle frame 468 is locked in the original position, the movement of the backward tilt handle 446 from the locked position to the released position pulls the arc cable 620 control line 624 connected to the air spring 568, so that the air spring 568 is released and the piston 569 is allowed to retract into the housing. Body 567, thereby allowing the middle frame 468 to tilt backward. When the middle frame 468 tilts backward along the axis 448, the pin 588 is coupled to the rim 596 and the piston 569 retracts into the housing 567 to compress the gas in the housing 567, and the gas biases the piston 569 to the extended position.

When the piston 569 is retracted into the housing 567, a locking assembly 598 automatically locks the pin 588 against the edge 596, so that the pin 588 and the housing 567 cannot slide into the elongated hole 586. The locking assembly 598 includes a connecting link 600 pivotally connected to the flange 580 and a locking link 602 with a hook 604. The locking link 602 can be pivotally connected to the front end 410 of the connecting link 600 and the pin 588, As shown in Figure 17-19.

When the piston 569 retracts into the housing 567 and the middle frame 468 tilts backward, the middle frame 468 generally pushes the connecting rod 600 forward, thereby causing the locking link 602 to pivot forward by the pin 588, as shown in Figures 17 and 18. As shown, the hook 604 is fixed to one of the slotted plates 574 and then the bolt 606 is locked, as shown in FIG. 18. Therefore, when the middle frame 468 is positioned between the home position and the backward inclined position and the air springs 566 and 568 are locked, the pin 588 is combined with the innermost edge 596 of the long hole 586 to prevent the middle frame 468 from moving further in the direction 607. In addition, the hook 604 is combined with the locking bolt 606 to prevent the middle frame 468 from moving in the direction 608.

When the air spring 568 is released and the middle frame 468 moves in the direction 607, the pin 578 slides from the edge 592 to the edge 590 in the front long hole 576, and when the middle frame 468 reaches the backward tilt position in FIG. 18, the middle frame can be prevented 468 moves further in direction 607. When the caregiver releases the tilt handle 446, the air spring 568 is locked to prevent the piston 569 from moving relative to the housing 567 and pulls the control wire 624 of the arc cable 620, and the control wire 624 pulls the tilt handle 446 to the locked position.

The middle frame 468 can also be moved from the home position to the forward tilt position by moving any forward tilt handle 444 from the locked position to the released position, as shown in FIGS. 17 and 19. The curved cable 622 includes a sheath that covers the flexible control wire 626 connected to each handle 444 and the air spring 566. Therefore, the movement of any handle 444 can pull the control wire 626 and release the air spring 566, allowing the piston 565 to contract. When inserted into the housing 563 and the middle frame 468 is tilted from the original position along the axis 448 in the direction 608, the lock 578 is coupled to the edge 592. In addition, the piston 656 retracts into the housing 563 to shorten the gas spring 566 and compress the gas in the housing 563, and the gas in the housing 563 presses the piston 565 to the extended position.

When the piston 565 is retracted into the housing 563, a locking assembly 610 automatically locks the pin 578 to the edge 592, so that the pin 578 and the housing 563 cannot slide in the elongated hole 586. The locking assembly 610 includes a locking link 614 with a hook 616, and the locking link 614 can be pivotally connected to the rear end 412 and the pin 578 of the connecting link 612, as shown in FIGS. 17-19.

When the piston 565 retracts into the housing 563 and the middle frame 468 tilts forward, the middle frame 468 pushes the connecting rod 612 forward and causes the locking link 614 to pivot backward by the pin 578, as shown in FIGS. 17 and 19, The hook 616 is made to hold a locking bolt 618 before being fixed to one of the long hole plates 574, as shown in FIG. 19. Therefore, when the middle frame 468 is positioned between the home position and the forward inclined position and the air springs 566 and 568 are locked, the hook 616 is combined with the locking bolt 618 to prevent the middle frame 468 from moving in the direction 607, and the lock 578 is combined The edge 592 of the long hole 576 prevents the middle frame 468 from moving in the direction 608.

When the air spring 566 is released and the middle frame 468 moves in the direction 608, the pin 588 moves from the edge 596 to the edge 594 in the rear long hole 586, and when the middle frame 468 reaches the forward tilt position shown in FIG. 19, the pin 588 is coupled to the edge 594 to prevent the middle frame 468 from moving further in the direction 608. When the caregiver releases the tilt handle 444, the air spring 566 is locked to prevent the piston 565 from moving relative to the housing 563 and pull the control wire 626 of the arc cable 622, and the control wire 626 pulls the tilt handle 444 to the locked position.

Therefore, if the caregiver moves any tilt handle 444 to the release position when the middle frame 468 is locked in the home position shown in FIG. 17, the air spring 566 is released and the middle frame 468 can be tilted forward in the direction 608. Similarly, if the caregiver moves the tilt handle 446 to the release position, the air spring 568 will be released and the middle frame 468 can move in the direction 607.

If the caregiver moves any tilt handle 444 to the release position when the middle frame 468 is locked in the forward inclined position shown in FIG. 19, the air spring 566 will be released and the middle frame 468 can be moved to the original position in the direction 607, When the middle frame 468 reaches the original position, the air spring 566 is fully extended. Similarly, if the caregiver moves the tilt handle 444 to the release position when the middle frame 468 is locked in the backward inclined position shown in FIG. 18, the air spring 568 is released and the middle frame 468 can be moved to the original position in the direction 608, and When the middle frame reaches the original position, the air spring 568 is fully extended.

The assembly 470 includes a first control board 472 that is rotatably connected to the column 556 of the middle frame 468 to rotate along the axis 448, and a second control board 474 that is rotatably connected to the column 558 of the middle frame 468 Rotate along axis 448. The axis 448 is defined by the main control shaft 562. The shaft 562 includes a central rod 652 and an end block 648 connected to the end of the central rod 652, as shown in FIG. 20. An axially extending groove 654 is provided at each end of the central rod 652, and each end block 648 includes a tongue extending into the groove 654, as shown in FIG. 20, the end block 648 and the central rod 652 are aligned along the axis 448 Spin.

Each of the control boards 472 and 474 includes a D-shaped hole 646 to accommodate the shaft 562, as shown in Figure 20-29 and referring to the control board 474, the connection of the control board 472 to the shaft 562 is roughly similar to that of the control rod 474 to the shaft 562 The connection, and the following descriptions related to the board 474 and the descriptions related to the chair 400 components also apply to the board 474, unless otherwise specified. Each end block 648 includes an outer end 650 with a D-shaped cross-section. The outer end 650 is coupled to the D-shaped hole 646 of the control board 474 in a driving manner. As shown in FIG. 20, the shaft 562 and the control board 474 are aligned along the axis 448 Spin. The bearing 658 is a tubular bushing installed on the end block 648, and is rotatably accommodated by the hole 554 formed in the box body 552 of the step frame 466 and the hole 560 formed in the middle frame 468, as shown in FIG. 20.

The outer end 650 of the end block 648 is configured to include a ring groove 660 to support a C-shaped ring 662. As shown in FIG.

The assembly 470 includes a first leaning assembly 628 (hereinafter referred to as the leaning assembly 628) adjacent to the first side 414 of the chair 400 and a second leaning assembly 630 (hereinafter referred to as the second side 416 of the chair 400) Leaning assembly 630), as shown in Figures 15, 16 and 21-23, the leaning assemblies 628, 630 are connected to the back section 422 and the seat section 426 to facilitate the control of the back section 422 and the seat section 426 relative to each other. The movement of middle shelf 468. In addition, the leg section configuration link mechanism assembly 632 (hereinafter referred to as the leg configuration assembly 632) is connected to the seat section 426, the middle frame 468, and the leg section 430 to control the leg section 430 relative to the seat section 426 and the middle Shelf 468 moves.

The leaning assembly 628 and the leg configuration assembly 632 are pivotally connected to the control board 472 and the shaft 562, respectively, as shown in Figs. 15-16 and 21-23. As a result, the control board 472 can be seated and stood relative to the middle frame 468. The positions of the back, the seat, and the leg sections 422, 426, 430 between each other and the middle frame 98 are established between the position and the platform position.

A locking mechanism 636 connects the shaft 562 to the middle frame 468. As shown in FIG. 15, the locking mechanism 636 has a rear end 412 pivotally connected to a member 640 adjacent to the column 582 and attached to the side column 556 of the middle frame 468 558, as shown in FIG. 15, and a front end 410, which is connected to a short piece fixed to the central rod 652 of the shaft 562 and extending radially outward therefrom. The locking mechanism 636 can be moved between a release position that allows the front end 410 of the mechanism 636 to move relative to the rear end 412 of the mechanism 636 so that the locking mechanism 636 can be retracted and a locked position where the front end of the locking mechanism 636 is relative to the rear end 412 of the mechanism 636. When the front end 410 of the mechanism 636 is locked relative to the rear end 412 of the mechanism 636, the locking mechanism 636 can prevent the shaft 562 from rotating, thereby preventing the control board 472 from moving relative to the middle frame 468.

The locking mechanism 636 includes a spring clutch with a clutch housing 644 and a rod 664 slidably accommodated by the clutch housing 644. The locking mechanism 636 may be referred to as the locking mechanism 636 and the spring clutch 636 in the text below. The rod 664 can be positioned at an infinite number of positions relative to the housing 644. As a result, the control board 472 can be locked at an infinite number of positions relative to the middle frame 468, and the patient support 420 can be positioned between the sitting position and the platform position. The time is locked at an infinite number of positions relative to the middle frame 468. Although the locking mechanism 636 includes a spring clutch, within the scope of the present invention, the locking mechanism 636 includes any locking mechanism referenced to the locking mechanism 636, which is suitable for locking the assembly 470 relative to the middle frame 468.

An arc-shaped cable 666 has a sheath to cover a flexible control wire 668, which is connected to the locking mechanism 636 so that the control wire 668 can move to release the locking mechanism 636 and release one of the spring clutches 636 to grasp the spring ( (Not shown in the figure) to allow the rod 664 to slide relative to the spring and relative to the clutch housing 644. The arc cable 666 extends from the clutch housing 644 through one of the arm rest assemblies 434 and reaches the lean handle 450. The control wire 668 is connected to the lean handle 450. Therefore, when the lean handle 450 is in the locked position, the spring is restrained. The lever 664 thereby locks the lever 664 relative to the clutch housing 644.

The locking mechanism 636 can be bent to its locking mode to press the leaning handle 450 to the locked position. When the caregiver pivots the leaning handle 450 from the locking position to the release position, the leaning handle 450 moves the control line 668 to release the locking mechanism 636 , Release the spring, and allow the rod 664 to slide relative to the clutch housing 644, so that the caregiver can move the back, seat, and leg sections 422, 426, 430 relative to the middle frame 468 between the sitting position and the platform position. Once the caregiver moves the patient support body 420 to the required position and the caregiver releases the leaning handle 450, the locking mechanism 636 can be automatically locked, that is, the control panels 472, 474 and the central rod 562 are locked, thereby locking the patient relative to the middle frame 468 The affected support body 420 is at the required position, and the control line 668 and the leaning handle 450 are automatically moved back to the locked position.

Although the locking mechanism 636 shown in FIG. 15 is connected to the main shaft 562 and the member 640 connected to the middle frame 468, within the scope of the present invention, the locking mechanism 636 is connected to any component of the link mechanism assembly 470 and is connected to the middle frame Therefore, when the locking mechanism 636 is locked, the link mechanism assembly 470 is blocked from moving relative to the middle frame 468. For example, the modified example of the chair 400 shown in FIG. 24 has a front end 410 of the locking mechanism 636 pivotally connected to a flange 792, which extends forward from a cross member 742 of the linkage assembly 470. And there is a rear end 412 of the locking mechanism 636 pivotally connected to a flange 794, which extends forward from a front middle frame member 744, as shown in FIG. 24. The locking mechanism 636 shown in FIG. 24 operates in a manner similar to the mechanism 636 shown in FIGS. 15 and 16 to lock and release the linkage mechanism assembly 470 from the middle frame 468.

As mentioned above, the assembly 470 includes the control board 472 on the first side 414 of the chair 400, the lean assembly 628, and the leg arrangement assembly 632, and the control board on the second side 416 of the chair 400 474. Leaning assembly 630, and leg configuration assembly 634. The latter is similar to the corresponding component on the first side 414 of the chair 400, except that the partial assembly 470 installed on the second side 416 is installed on the The mirror image of the partial assembly 470 on the first side 414. The control board 472, the leaning assembly 628, and the leg configuration assembly 632 and their operations are roughly similar to those of the control board 474, the leaning assembly 630, and the leg configuration assembly 634, respectively. Therefore, for the control board 472, the leaning assembly The descriptions of 628, and leg configuration assembly 632 are also applicable to the control board 474, lean assembly 630, and leg configuration assembly 634, unless otherwise specified.

The patient support 420 includes back links 672 spaced laterally apart. The back section 422 is fixed to the back section connecting rod 672, and when the patient support body 420 is in the platform position of Figs. 16, 23, it extends downwards therefrom, and when the patient support body 420 is in the sitting position of Fig. 21 Then it extends upwards from then on. The patient support body 420 also includes a seat section frame member 670 of the seat section 428 and a leg section frame 781 of the leg section 430 extending in the longitudinal direction and spaced in the lateral direction.

The leaning assembly 628 includes a short portion 680 that connects the seat frame member 670 to the control board 472 and the back link 672, as shown in FIGS. 15-16 and 21-23. A bottom end 686 of the short portion 680 is pivotally connected to the control board 472 by a pivot pin 690, so that the seat section 428 can pivot relative to the control board 472, and a top end 694 of the short portion 680 uses a pivot pin 692. It can be pivotally connected to the back section frame link 672, so that the back section 422 and the seat section 428 can pivot relative to each other according to a pivot axis 696 defined by the pin 692. In addition, an inclined link 676 of the leaning assembly 628 connects the seat section frame member 670 to the middle frame 468, as shown in FIG. 15, so as to control the movement of the seat section 428 relative to the middle frame 468.

The back link 672 is generally in the shape of an inverted U as shown in Figures 15 and 21, and includes a middle section, a front section 682 extending downward from the middle section, and a rear section 684 extending downward from the middle section and spaced apart from the front section. 682 can be pivotally connected to the top 694 of the short portion 680, and the rear section 684 is connected to the control board 472 via a chair stop link 674, which is operated to stop the patient support when the patient support 420 reaches the sitting position 420 moved away from the platform position.

The pivot pin 698 can pivot the chair stop link 674 to the rear section 684 of the back section link 672, and the pivot pin 712 pivots the chair stop link 674 to the control board 472, so that the chair stop link 674 and the seat frame member 670 are directly connected to the control board 472, and the back link 672 is indirectly connected to the control board 472 through the seat stop link 674 and the short portion 680 of the seat frame member 670, as shown in FIG. 21 As shown in -23, as a result, the back section 422, the seat section 426, and the control board 472 can be pivotally connected to each other, and the pivoting of any one of the back section 422, the seat section 426, or the control board 472 relative to the middle frame 468 can cause The pivot of the others.

The inclined link 676 has a first end that is pivotally connected to a flange 726 and the flange is projected from the frame member 670 and a flange 728 that is pivotally connected to the middle frame 468 The second end of the extension, as shown in Figures 21-23, the flange 726 is roughly separated from the front end 410 of the seat section frame member 670 and the rear end 422 of the seat section frame member 670, and the flange 728 is adjacent to the middle frame 468 Before the end 410. Therefore, the inclined link 676 connects the seat section 426 to the middle frame 468, and the short portion 680 of the seat section frame member 670 connects the seat section 428 to the middle frame 468 via the control board 472 to facilitate relative movement thereof. It can be seen that the back section 422 is connected to the seat section 426 and the back, seat sections 422, 426 are connected to the control board 472 and the middle frame 468, so that any one of the back section 422, the seat section 426, or the control board 472 can move. It will cause the others to move relative to the middle shelf 468.

When the back section 422 and the seat section 426 are in the sitting position, the control board 472 has a first orientation extending substantially rearward from the axis 448, as shown in FIGS. 15, 21. As described above, when the locking mechanism 636 is locked, the The mechanism 636 prevents the short film 642 from moving, prevents the central rod 652, the end block 648, and the control board 472 from rotating relative to the middle frame 468, thereby preventing the patient support 420 from moving relative to the middle frame 468.

For example, when the patient support body 420 is locked in the sitting position shown in FIG. 21, the caregiver can release the locking mechanism 636 and pull the back section 422 downward in the arrow direction 425 to the platform position along the axis 696. When the back section 422 moves downward, the back section link 672 rotates in the direction 730 according to the lock 692, as shown in FIG. 21, so that the back section 684 of the back section link 672 pushes the chair stop link 674 forward The forward rotation of the chair stop link 674 can rotate the control board 472 clockwise in the arrow direction 732 shown in FIG. 21 along the axis 448, and the clockwise rotation of the control board 472 is along a circular arc 734 The axis 448 repels the pin 690 of the seat section frame member 670, as shown in FIG. 21, and moves the seat section frame member 670 of the short portion 680 along the axis 448, as shown in FIGS. 21 and 22, so that when the back section 422 is seated along the axis 448 When the vertical position is moved to the platform position, the seat section 426 moves in response to the rotation of the control board 472.

The short portion 680 cooperates with the inclined link 670 to limit the movement range of the front end 410 of the seat section 426, so that when the patient support 420 moves from the sitting position in FIG. 21 to the platform position in FIG. 23, the seat section 426 is as shown in FIG. 21 As shown in a substantially horizontal and flat position adjacent to the middle frame 468, move to an inclined transition position shown in FIG. 22 so that the front end 410 of the seat section 426 rises to an inclined transition position above the rear end 412 of the seat section 426, and then when the patient support body 420 is in the figure In the platform position shown in 23, it can be moved to a substantially horizontal flat position separated from the middle frame 468. It can be seen that the back, seat, and leg sections 422, 426, 430 of the patient support body 420 can define a transition position between the sitting position and the platform position, which makes the front end 410 of the seat section 426 be located in the seat section 426 Above the rear end 412, as shown in FIG. 22. When the patient support body 420 is in the transition position, the control board 472 extends substantially downward from the horizontal axis 448, as shown in FIG. 22.

When the back, seat, and leg sections 422, 426, 430 are locked in the platform position of FIG. 23, the control board 472 is in a second position extending forward from the axis 448, and the caregiver can release the locking mechanism 636 and move upward along the axis 696. Pull the back section 422, pull it away from the floor 62 in the direction of the arrow 423 shown in FIG. 23, pass the transition position in FIG. 22, and pull it back to the sitting position in FIG.

The chair stop link 674 includes a front portion 714 that extends substantially forward from the pin 712, as shown in FIGS. 21-23. The front portion 714 has a front edge 724 and a locking edge 716 adjacent to the front edge 724. The locking edge 716 defines a notch 718. A stop bolt 720 is fixed to the control board 472. When the back section 422 and the seat section 426 are in the sitting position shown in Figs. 716, prevent the chair stop link 674 and the pin 710 from moving upward, prevent the control board 472 from continuously rotating in the direction 733, and thereby prevent the patient support 420 from moving away from the platform position and passing the sitting position. When the back section 422 and the seat section 426 are in the platform position shown in FIG. 23, the front edge 724 of the chair stop link 674 is joined to a bottom surface of the seat section 426 to prevent the chair stop link 674 from moving in the direction The 741 moves upward to prevent the control board 472 from continuously rotating, and to prevent the patient support 420 from moving from the sitting position to the platform position.

As mentioned above, the leg configuration assembly 632 of the control assembly 470 controls the movement of the leg section 430 relative to the seat section 426 and the middle frame 468. As shown in FIGS. 21-23, the leg configuration assembly 632 can pass through the cross member 742 and The seat frame member 670 is pivotally connected to the control board 472. Therefore, when the control board 472 rotates along the axis 448, the leg arrangement assembly 632 and the leg section 430 move. When the back, seat, and leg sections 422, 426, and 430 are in the sitting position, the leg configuration assembly 632 is closed as shown in Figure 21, and when the back, seat, and leg sections 422, 426, and 430 are in the platform position, the leg configuration is always The 632 is opened as shown in Figure 23.

As described above, the middle frame 468 includes a transversely extending front member 744, which is adjacent to the front pillar 572 and connected to the first and second side pillars 556, 558 of the middle frame 468, as shown in FIGS. 15, 25, a pair of spaced methods The blue plate 748 is fixed to the member 774 and extends forward therefrom. In addition, the transversely extending cross member 742 is substantially parallel to the member 744, and connects the seat frame member 670 of the first leaning assembly 628 to the seat frame member 670 of the second leaning assembly 630, as shown in FIG. 15, a A pair of spaced flanges 766 are fixed to the cross member 742 and extend generally forward therefrom, and a second pair of spaced flanges 754 are fixed to the cross member 742 and extend generally forward and downward therefrom. The leg configuration assembly 632 is pivotally connected to the cross member 742 by flanges 754 and 766, and is pivotally connected to the front member 744 by flange 748.

When the caregiver moves the back section 422 away from the sitting position and toward the platform position, so that the control board 472 rotates in the direction 732 along the axis 448 and moves the seat section frame member 670 substantially forward relative to the middle frame 468, the cross member 742 moves substantially forward along the frame member 670 and moves away from the frame member 744. The separation of the cross member 742 from the front middle frame member 744 allows the leg configuration assembly 632 to automatically open from the closed position shown in FIG. 21, through a transition position shown in FIG. 22, to the open position shown in FIG. 23.

The leg arrangement assembly 632 includes a swing link 746 pivoted on the fixed flange 748 to swing and move between a downwardly closed position shown in FIG. 21 and an upwardly opened position shown in FIG. 23. The leg configuration assembly 632 also includes a driven link 752, which is installed on the flange 754 of the seat section 426 and connects the flange 754 to the swing link 746, so that when the seat section 426 moves between the sitting position and the platform When between the positions, the driven link 752 swings the swing link 746 between the closed position and the open position, respectively. The fixed flange 748 is fixed to the member 744 of the middle frame 468, and the flange 754 is connected to the member 742 fixed to the seat section 426, so that when the front end 410 of the seat section 426 moves to the platform position on the patient support 420, it moves away When the front end 410 of the middle frame 468 is centered, the driven link 752, that is, the swing link 746 moves upward to the open position.

The first power link 758 of one of the leg configuration assemblies 632 connects the front end of the swing link 746 to the first horizontal link 762 of the leg configuration assembly 632, as shown in Figures 15, 21-23, the first horizontal link The rod 762 has a first end pivotally connected to the front end 410 of the flange 766 and a second end pivotally connected to a second power link 784. The second power link connects the cross link 762 to the leg section 430. Therefore, when the swing link 746 moves from the closed position to the open position, the swing link 746 pushes the first power link 758 upward and pushes the second power link 784 upward, thereby moving the leg section 430 rises from the sitting position to the platform position.

A follower link 770 of the leg configuration assembly 632 is pivotally connected to the rear end 412 of a flange plate 766 spaced from the first horizontal link 762, as shown in Figures 21-23, the follower link 770 is pivotally connected A third power link 774 of the leg arranging assembly 632, and a middle section of the third power link 774 is pivotally connected to a middle section of the first horizontal link 762, as shown in Figs. 22 and 23, so that the second and third The power links 784 and 774 cooperate with the first horizontal link 762 to establish the orientation of the column 780 and the leg section 430.

When the caregiver moves the leaning handle 450 to release the locking mechanism 636 and moves the patient support body 420 from the sitting position to the platform position, the front end 410 of the seat section 426 moves away from the front end 410 of the middle frame 468, and the flange 754 766 moves away from the flange 748 along with the seat section 426, as shown in Figure 21-23. The flange 754 pulls the driven link 752 upwards, and the swing link 746 forwards and upwards. The swing link 746 pushes the power link 758 forward to swing the first horizontal link 762 forward and The upward and repelling power link 784 is upward and the repulsion power link 774 is forward and upward, and the leg section 430 is configured from the sitting position to the platform position. The power link 774 repels the follower link 770 so that the follower link 770 can swing forward and upward relative to the flange 766 when the leg section 430 is configured.

For example, as shown in FIGS. 21-23, when the leg section 430 is moved from the sitting position to the platform position, the second power link 784 can be deployed relative to the horizontal link 762, and the third power link 774 is relative to the follower link. The rod 770 is unfolded, and the cross link 762 moves the leg support surface 432 from the forward direction shown in FIGS. 14, 16, and 21 to the upward direction shown in FIGS. It can be seen that when the patient support body 420 is at the platform position, the leg section 430 is longitudinally separated from the seat section 426 by a distance 788, as shown in FIG. 23.

When the back, seat, and leg sections 422, 426, 430 are locked in the platform position and the leg configuration assembly 632 is opened, the caregiver can release the locking mechanism 636, and move the back section 422 upward and toward the seat section 426 in the direction 423. Pulling forward to the sitting position, movement of the back section 422 in the direction 423 can automatically move the front end 410 of the seat section 426 downward toward the front end 410 of the middle frame 468 and move the flanges 754 and 766 toward the flange 748.

When the flanges 754 and 766 of the seat section 426 move to the flange 748 of the middle frame 468, the flange 754 pushes the driven link 752 downward, and the swing link 746 moves backward and downward , Repel the power link 758, the first horizontal link 762, and the third power link 774 downward, thereby pulling the leg section 430 downward to move from the platform position to the sitting position. When the caregiver moves the patient support 420 to the required position, the caregiver can release the handle 450 on the arm rest assembly 434, and the locking mechanism 636 is locked to prevent the patient support 420 from moving further.

As described above, the chair 400 includes a first arm rest assembly 434 installed on the first side 414 of the chair 400 and a second arm rest assembly 434 installed on the second side 416 of the chair 400. Each arm The supporting assembly 434 includes an arm supporting member 436, which has an upward facing arm supporting surface 454 and a lockable arm supporting member 436 to move up and down relative to the seat section 426. The arm supporting member release handle 452. The following description of the arm rest assembly 434 installed on the first side 414 of the chair 400 and the description shown in FIG. 25 also apply to the arm rest assembly 434 installed on the second side 416 of the chair 400 unless otherwise specified.

The arm rest assembly 434 includes an arm rest 436 connected to a plate 812, and the plate generally extends downward from the arm rest 436. As shown in FIG. 25, a front guide rod 814 is mounted on the arm rest 436 and Since then, it extends downwardly and is adjacent to the front end 410 of the plate 812, and a rear guide rod 816 is spaced apart behind the rod 814, is mounted on the arm rest 436 and extends downwardly therefrom to be adjacent to the rear end 412 of the plate 812. The arm rest assembly 434 also includes a housing 800. The housing includes a support member 802 mounted on the middle frame 468 and a cover 804 including a top cover 839 and a bottom cover 842. The support member 802 is composed of front and rear guides. The guides 818, 820 are used to receive the front and rear rods 814, 816, respectively. The front and rear guides 814, 816 can guide the plate 812 and the arm rest 436 to move up and down relative to the supporting member 802 and the middle frame 468 , As shown in Figure 25.

The supporting member 802 also includes a bottom post 808 shown in FIG. 25. The front and rear guides 818, 820 are installed on the post 807 and extend upward therefrom. A supporting post 826 is spaced above the post 808 and attached to the front , The rear guides 818, 820, to facilitate the support of the front and rear guides 818, 820. A front connector 822 connects the front end 410 of the column 826 and the front end 410 of the column 808 to one of the corresponding front columns 572 of the middle frame 468, and a rear connector 824 is spaced behind the front connector 822 and connects the rear end 412 of the column 826 to the column The rear end 412 of the 808 is connected to one of the middle frames 468 corresponding to the rear pillar 582. The front and rear pillars 822, 824 are connected to the front and rear pillars 572, 582, respectively, so that the supporting member 802 is separated from the pillar 556 of the middle frame 468, which is sufficient to allow the operating space of the assembly 628 and the control board 472 to be leaned against without the arm Relying on the interference of assembly 434.

The arm rest assembly 434 includes a locking mechanism 828, which can prevent the plate 812 and the arm rest 436 from moving relative to the supporting member 802 and the middle frame 468 at a locking position and allow the plate 812 and the arm rest 436 to support relative to each other. The member 802 moves between one of the release positions of the movement of the middle frame 468. The locking mechanism 828 includes a spring clutch with a clutch housing 830 and a rod 832 that is received by the clutch housing 830 for sliding movement. The rod 832 is mounted on the plate 812 and extends downwards therefrom, as shown in FIG. 25 . The clutch housing 830 is installed on the guide 834 of one of the supporting members 802 and on a middle section of the column 808, and the rod 832 is accommodated by the clutch housing 830. The spring clutch uses an arc cable 836 to connect to the arm rest release handle 452, and the arc cable has a flexible control wire 837 covered by a sheath. Although the locking mechanism 828 includes a spring clutch, the locking mechanism 828 within the scope of the present invention includes any locking mechanism as referred to the aforementioned locking mechanism 180, and is suitable for locking the arm rest 436 to the middle frame 468.

When the arm rest release handle 452 is in the downward locking position, the locking mechanism 828 locks and prevents the rod 832 from sliding relative to the clutch housing 830, thereby locking the plate 812 and the arm relative to the supporting member 802 and the middle frame 468 The supporting member 436, the arm supporting member 436 and the plate 812 are prevented from moving up and down relative to the supporting member 802 and the middle frame 468. When the caregiver moves the arm rest release handle 452 to the upward release position, the control wire 837 of the arc cable 836 moves the locking mechanism 828 to the release position, so that the rod 832 can slide relative to the clutch housing 830, and the plate 812 and The arm rest 436 can move up and down relative to the supporting member 802 and the middle frame 468.

The top cover 839 is in a segmented shape. It has a top 838 and a bottom 840 attached to the top 838. The top and bottom covers 839, 842 can cover the guides 818, 834, 820, the rods 814, 816, and the locking mechanism 828, as shown in Figures 14 and 25. The top cover 839 is attached to the plate 812 to move up and down accordingly, and the bottom cover 842 is attached to the guide members 818, 820 and is still fixed relative to the middle frame 468 during the up and down movement of the arm supporting member 436, so , The top cover 839 can be stretched relative to the bottom cover 842 when the arm rest 436 moves up and down.

As mentioned above, the chair 20 of the first example and the chair 400 of the second example each include a central wheel arrangement assembly 138, and the central wheel 82 can be moved as shown in FIGS. 26 and 27 to contact and disengage from the floor 62. Although the brake-operating pedal 80 and brake-operating shaft 86 of the chair 20 are shown in FIG. 26, those skilled in the art should understand that the brake-operating pedal wing 456 and the brake-operating shaft 460 of the chair 400 can be in the center. The wheel configuration assembly 138 is used to actuate the center wheel configuration assembly 138 when installed on the chair 400.

The central wheel arrangement assembly 138 includes a long fork member 142 and a pivot rod 140 connecting the fork member 142 to the shaft 86. As shown in FIGS. 26 and 27, the rear end 24 of the fork member 142 constitutes a vertically extending long hole 850, and The front end 22 of the fork member 142 is connected to a lifting sub-assembly 848 of the central wheel configuration assembly 138, as shown in FIG. 26. The pivot rod 140 uses a pivot pin 852 to be connected to the fork 142. The pivot pin is fixed to the connecting rod 140 and is received by the long hole 850 for sliding and pivoting in the hole.

The rear member 148 of the chassis 92 includes an opening 860 to carry a bushing 858. As shown in FIG. 26, the fork 142 can be slidably received by the bushing 858 to facilitate longitudinal movement of the 844. Therefore, the connecting rod 140 corresponds to the shaft 86 is rotated and pivoted and the fork 142 slides in the direction 844 in the bushing 858 relative to the rear member 148 of the chassis 92. The movement of the fork 142 in the direction 844 causes the sub-assembly 848 to move the center wheel 82 to contact and disengage On the floor 62.

When the pedal 80 is in the substantially horizontal neutral position, the center wheel 82 is spaced from the floor 62 as shown in FIG. When the caregiver presses the brake portion 130 of the pedal 80, the shaft 86 rotates in the braking direction 134 along the axis 88, the pivot rod 140 pivots in the direction 134 along the axis 88, and the pin 852 is coupled to a front edge of the elongated hole 850 862, and the repulsion fork 142 moves forward. When the fork 142 slides forward from the neutral position and the connecting rod 140 continues to pivot in the direction 134, the pin 852 slides upward in the long hole 850, and when the pedal 80 is in the braking position, the fork 142 is tied in the direction The front position, and the sub-assembly 848 presses the center wheel 82 on the floor 62.

Similarly, when the fork 142 is in the neutral position and the caregiver presses the operating portion 132 of the pedal 80, the shaft 86 rotates in the operating direction according to the axis 88, the connecting rod 140 pivots in the direction 136 according to the axis 88, and the pin 852 It is coupled to a rear edge 866 of one of the elongated holes 850, and the fork member 142 is pulled backward. When the fork 142 slides backward from the neutral position and the connecting rod 140 continues to pivot in the direction 136, the pin 852 slides upward in the elongated hole 850. Once the pedal 80 is in the operating position, the fork 142 is in the backward position and the second The assembly 848 presses the center wheel 82 against the floor 62, as shown in Figure 27 (shown in dashed lines). Therefore, the movement of the pedal 80 between the braking position and the operating position can cause the fork 142 to move between the forward position and the backward position, respectively causing the center wheel 82 to separate from the floor 62 and move upward to the neutral position and downward to the neutral position. Touch the floor 62.

The central wheel arrangement assembly 138 includes a roller track housing 868, which is suspended from the front member 146 of the base frame 92 and extends backwards therefrom. As shown in Figures 26 and 27, the roller track housing 868 includes a roller facing upwards. The rail 872 and the first and second spaced grooves 870 of the aforementioned roller rail 872 are defined, as shown in FIG. 26. The front end 22 of the fork 142 includes a pair of spaced prongs 874, and each prong 874 extends forward into a corresponding channel 870 of the roller track housing 868.

The ascension sub-assembly 848 includes first and second rollers 876, each of which is rotatably mounted on the front end 22 of a corresponding prong 874, as shown in Figures 26 and 27. The first roller 876 is accommodated in the first channel 870 and The first roller 876 is accommodated in the second channel 870, the roller 876 rolls back and forth along the roller rail 872, and the fork 142 reciprocates between the forward and backward positions. A first roller arm 878 of the lift sub-assembly 848 is pivotally connected to the first roller 876 by a first pin 880, and a second roller arm 878 is pivotally connected to the second roller by a second pin 880 876.

The lift sub-assembly 848 also includes a horizontally extending lift pin 882, and the roller arm 878 connects each pin 880 to the lift pin 882. As shown in Figure 26, the lift pin 882 can be pivotally connected to a central wheel rod. The top 884 of one of the 886s is shown in Figures 26 and 27. The roller track housing 868 is composed of a vertically extending hole 892, and the hole has a square cross-section. The hole 892 can accommodate the central wheel rod 886 for vertical sliding, and a pair of vertically extending guide groove plates 898 are accommodated in the hole. 892 and fixed to the roller track housing 868, the plate 898 can guide the central wheel rod 886 to move vertically between a raised position and a lowered position as shown in FIG. 27, so that the lifting pin 882 follows the rod 886 in the hole 892 Move vertically in the middle. When the roller 876 rolls along the roller rail 872, the roller arm 878 pivots on the pin 880 to facilitate the lifting and lowering of the lifting pin 882 and the central wheel rod 886 relative to the plate 898, the housing 868, and the floor 62.

The central wheel rod 886 extends downward through the hole 892 and a central wheel bracket 888 is installed at the bottom end 890 of the central wheel rod 886 under the housing 868, and the central wheel 82 is installed on the central wheel bracket 888 to facilitate a horizontally extending central wheel shaft. 896 rotation, as shown in Figure 26. A spring 900 is installed and compressed on the rod 886 below the housing 868, and can press the bracket 888 and the central wheel 82 downwardly away from the housing 868.

When the pedal 80 is in the braking position and the fork 142 is in the forward position, the roller 876 is positioned in front of the rod 886, and the roller arm 878 is inclined downward and forward from the lifting pin 882 to the shaft pin 880, as shown in Figure 26, 27 (indicated by a dashed line in FIG. 27), the lever 886 is in the lowered position and the center wheel 82 is in the downward brake-manipulation position. When the pedal 80 is in the operating position and the fork 142 is in the backward position, the roller 876 is positioned behind the rod 886, and the roller arm 878 is inclined downward and backward from the lifting pin 882 to the shaft pin 880, as shown in Figure 27 ( (Indicated by a dashed line in FIG. 27), the lever 886 is again in the lowered position and the center wheel 82 is in the downward brake-manipulation position. When the caregiver moves the pedal 80 to the neutral position, the fork 142 moves to the neutral position, and the roller 876 and the roller arm 878 are moved to a vertical locking position, and the roller 876 is placed vertically below the pin 882 to make the roller arm 878 The lift pin 882 extends approximately vertically. Therefore, when the pedal 80 is in the neutral position, the roller arm 878 extends substantially vertically from the lifting pin 882 and the rod 886 to the raised position, so that the center wheel 82 is in the upward neutral position and is spaced from the floor 62.

When the sub-assembly 848 is in the neutral position, the roller 876 is accommodated in a recess 910 defined by a bottom wall 912 of each roller rail 872, a front inclined surface 914, and a rear inclined surface 916. The rod 886 can be Bending downwards, the roller 876 can firmly combine the bottom wall 912 with the front and rear slopes 914, 916 to lock the roller 876 and the roller arm 878 in the vertical locking position, thereby locking the pedal 80 in the horizontal neutral position and locking The center wheel 82 is in the neutral position of the spaced floor 62, as shown in FIG. 27.

When the caregiver presses the brake portion 130 of the pedal 80 to pivot the pedal 80, the shaft 86, and the connecting rod 140 to the braking position in the direction 134, the fork 142 moves forward to the forward position and the roller 876 rolls forward and away from the bottom. When the roller 876 moves out of the recess 190 and passes through the inclined surface 914, the spring 900 pushes the roller 876 forward and pushes the bracket 888, the rod 886, and the center wheel 82 downward until the center wheel 82 reaches the Brake-manipulation position of floor 62.

Similarly, when the caregiver presses the operating portion 132 of the pedal 80 to pivot the pedal 80, the shaft 86, and the connecting rod 140 to the operating position in the direction 136, the fork 142 moves back to the rear position and the roller 876 rolls back away from the bottom wall. 912, and when the roller 876 moves out of the recess 910 and passes through the inclined surface 916, the spring 900 pushes the roller 876 backward and pushes the bracket 888, the rod 886, and the center wheel 82 downward until the center wheel 82 reaches the floor 62. The brake-control position.

When the center wheel 82 contacts the floor 62, the spring 900 pushes the center wheel 82 to a position defined by the plane of the floor 62 and the bottoms of the front and rear casters 58, 60. Of course, the floor 62 restricts the center wheel 82. Move down, but if the surface of the floor 62 is not flat or does not fit the plane defined by the bottoms of the front and rear casters 58, 60, the spring 900 will cooperate with the roller track shell 868 and the bracket 888 to facilitate Keep the center wheel 82 in contact with the floor 62. For example, when the chair 20 passes through the threshold or doorway, the plane defined by the bottom of the front and rear casters 58 and 60 does not need to be the same plane as the floor 62, but the spring 900 still keeps the configured central wheel 82 touching the floor 62.

The central wheel arrangement assembly 138 is designed to maintain the arrangement between the central wheel 82 and the floor 62 when the floor 62 under the central wheel 82 is about 0.75 inches (1.9 cm) apart from the plane defined by the bottoms of the front and rear casters 58, 60 get in touch with. In addition, the center wheel arrangement assembly 138 allows the arranged center wheel 82 to pass through a threshold, which is approximately 20.75 inches (1.9 cm) higher than the plane defined by the bottoms of the front and rear casters 58, 60.

Figures 28-33 show a transformation example of a central wheel configuration assembly 920, which can be installed on the underframe 92 of the chair 20 or the underframe 492 of the chair 400, and operated to move the central wheel 82 between the floor 62 Between the neutral position and the brake-operating position that touches the floor 62, the following description about the central wheel configuration assembly 920 of the chair 400 is also applicable to the chair 20, unless otherwise specified.

The assembly 920 includes a brake-operating shaft 922, which is mounted on the rear tube 126 of the chassis 492 to pivot along a horizontal lateral pivot axis 924. As shown in FIG. 28, the brake-operating shaft 922 includes a pair of spaced horizontal The tube 926 extends laterally inward from the rear tube 126 and is generally U-shaped tube 928 connected to the horizontal tube 926. A brake pedal 930 has an upwardly facing brake surface 932, and the pedal is suspended from each horizontal tube 926 and extends substantially outwardly therefrom. The U-shaped tube 928 extends forward from the tube 926 and includes a central deviation portion 934 and a manipulation pedal 936. The manipulation pedal has an upwardly facing manipulation surface 938 mounted on the deviation portion 934, as shown in FIG. 28.

Applying a downward contact force to the braking surface 932 of any brake pedal 930 can rotate the shaft 922 in the braking direction of the arrow 933 in FIG. 28 along the pivot axis 924 until the shaft 922 and the pedal 930 reach the braking position shown in FIG. 30; The contact force on the operating surface 938 of the operating pedal 936 can rotate the shaft 922 in the steering direction of the arrow 939 in FIG. 28 along the axis 924 until the shaft 922 and the pedal 936 reach the operating position shown in FIG. 31. The shaft 922 has a substantially horizontal neutral position as shown in FIG. 29, between the brake and steering positions.

The shaft 922 is connected to each rear caster 60 by using a brake mechanism (not shown in the figure) well known to those accustomed to this technique. When the shaft 922 is in the braking position, the brake mechanism is moved to a braking position to turn the rear casters 60 and Prevent the rear caster 60 from swinging. When the shaft 922 is in the neutral position or the operating position, the brake mechanism is moved to a release position to release the rear casters 60 so that the rear casters 60 can swing freely. Each brake mechanism is attached to the shaft 922 and positioned in a corresponding rear tube 126.

The assembly 920 includes an H-shaped control beam 940, a pair of spaced longitudinally extending tubes 942 and a horizontal tube 944 extending transversely therebetween. The front end 410 of each tube 942 is mounted on the frame member 148 of the underframe 492 to A pivot pin 948 is used to pivot along a horizontal lateral pivot axis 950. The pivot pin is connected to a U-shaped bracket and the bracket is suspended from the frame member 148, as shown in Figs. 28-31. The control beam 940 also includes a dipper 952, which is suspended from the horizontal tube 944 and extends forwardly therefrom. The front end 410 of the dipper 952 includes an elbow. The elbow has a concave head surface 954 for coupling to an axle pin. The exposed part of 956 is for the central wheel 82 to be installed for rotation.

The assembly 900 further includes a longitudinally extending column 980 to connect the front frame member 146 and the rear frame member 148 between the side members 512 and 514 of the bottom frame 492. As shown in Figure 28-31. A pair of central wheel arm pieces 982 are installed on the pillar 980 to pivot on a horizontal and transverse pivot axis 984 using a pivot pin 986. The pivot pin is connected to a U-shaped bracket 988 extending from the pillar 900. The central wheel arm The pieces 982 are spaced apart to accommodate the center wheel 82 therebetween. In addition, the center wheel 82 is rotatably connected to the rear end 412 of each center wheel arm 982 by a shaft pin 956.

A spring 990 connects the front end 410 of each central wheel arm 982 to a respective curved flange 992 extending upward from the middle section of the pillar 980. As shown in FIG. 28, the spring 990 maintains a tensioned state so that when the central wheel 82 is braking -In the operating position, the center wheel 82 can be pressed against the floor 62 to provide a frictional contact area for the floor 62 for easy manipulation of the chair 400. In addition, the spring 990 pushes the exposed part of the shaft pin 956 to contact the scoop The concave top surface 954 of the rod 952.

The control beam 940 is positioned below the brake-operating shaft 922 and is connected to it by a pair of spaced coupling link mechanisms 958. Each coupling link mechanism 958 includes a bottom link 960, which can be pivoted by a pivot pin 962 Connected to the rear end 412 of a separate tube 942. Each connecting link mechanism 958 also includes a top link 964, which uses a hexagonal pin 966 to be fixed to a corresponding horizontal tube 926, as shown in FIGS. 32 and 33. Each bottom link 960 includes a top edge 968, which can cooperate with a bottom edge 970 to define a long hole 972, a connecting pin 974 connects each top link 964 to each bottom link 960, and each pin 974 is A corresponding long hole 972 is accommodated to facilitate rotation and sliding.

The assembly 920 includes a pair of longitudinally extending neutral pedals 976, each including an upwardly facing foot contact surface 978. Each neutral pedal 976 is connected to the rear end 412 of a corresponding tube 942 of the control beam 940, as shown in FIG. 28 shown. Applying a contact force to any foot contact surface 978 of the neutral pedal 976 can move the control beam 940 to a substantially horizontal neutral position, and the shaft 922 and the center wheel 82 can be moved to it through the operation of the linkage mechanism 958 The respective neutral positions.

When the shaft 922 moves in the braking direction 933, the top link 964 pivots and moves the knot pin 974 forward in the arrow 973 direction shown in FIG. 28, thereby moving the link mechanism 958 to the forward folding orientation shown in FIG. 30 , The forward folding movement of the linkage mechanism 958 pulls the pivot pin 962 upward, causing the control beam 940 to tilt forward according to the pivot pin 948. When the control beam 940 is tilted forward, the center wheel 82 moves downward to the brake-operating position due to the downward movement of the front end 410 of the scoop 952.

When the shaft 922 moves in the manipulation direction 939, the top link 964 pivots and moves the coupling pin 974 backward in the arrow 975 direction shown in FIG. 28, thereby moving the link mechanism 958 to the backward folding orientation shown in FIG. 31. The backward folding movement of the link mechanism 958 pulls the pivot pin 962 upwards, causing the control beam 940 to move forward tilting according to the pivot pin 948 and the downward movement of the front end 410 of the ladle lever 952 causes the center wheel 82 to move downward to the brake- Manipulate the position. Therefore, when the link mechanism 958 is in the forward or backward folding orientation, the center wheel 82 is in the brake-manipulation position and contacts the floor 62.

When the shaft 922 is in the braking position, a downward contact force is applied to the foot contact surface 978 of any neutral pedal 976, which causes the control beam 940 to move along the axis 950 in the direction of the arrow 993 shown in FIG. 28 (indicated by dashed lines) When the control beam 940 is inclined backward, the pivot pin 962 pulls the bottom link 960 downward, thereby moving the link mechanism 958 from the forward folded position to the linear position shown in FIG. 29. Similarly, when the shaft 922 is in the operating position, a downward contact force is applied to the foot contact surface 978 of any neutral pedal 976, causing the control beam 940 to tilt backward in the direction 973 according to the axis 948, and the pivot pin 962 and The downward movement of the bottom connecting rod 960 and the displacement of the connecting rod mechanism 958 from the backward folding direction to the linear orientation. The backward tilt movement of the control beam 940 causes the top surface 954 of the dipper 952 to lift the shaft pin 956 upward, thereby moving the center wheel 82 away from the floor 62.

When the link mechanism 958 is in the linear orientation, the shaft 922 is in the substantially horizontal neutral position, so that the center wheel 82 is spaced from the floor 61, and the control beam 940 is in the substantially horizontal neutral position shown in FIGS. 28 and 29. In addition, when the link mechanism 958 is in a linear orientation, a flat top edge 994 of the bottom link 960 abuts against a flat stop edge 996 formed at the middle section of the top link 964, as shown in FIG. 32.

When the center wheel 82 is in the neutral position, the spring 990 urges the center wheel 82 downward and the exposed portion of the shaft pin 956 downward, and contacts the top surface 954 of the dipper 952, as described above. The shaft pin 956 pushes down against the dipper 954, that is, the control beam 940 is forced to tilt forward along the axis 950, so that the top edge 994 of the bottom link 960 is forced upward to be combined with the stop of the top link 964 Edge 996, as shown in Figure 32. The combination of the top edge 994 and the stop edge 996 under the force of the spring 990 will "lock" the control beam 940, the shaft 922, and the center wheel 82 in their respective neutral positions.

When the link mechanism 958 is in a linear orientation, the connecting pin 974 is adjacent to the bottom edge 970 of the bottom link 960, as shown in FIG. 32. When the shaft 922 moves in the direction 933 or 939, the coupling pin can be moved in the direction 973 or 975, respectively, and the coupling pin 974 moves upward in the long hole 972 away from the bottom edge 970 and is coupled to the top edge 968. In addition, the stop edge 996 of the top link 964 is separated from the top edge 994 of the bottom link 960, as shown in FIG. 33.

It can be seen that the chair 20, 400 can improve the efficiency and productivity of nursing care by providing multiple positions for patient inspection and treatment. Each chair 20, 400 includes a "hydraulic high-" which is actuated by caregivers. "Low", it uses the footrests 90, 464 placed along the side of the chair 20, 400, and there are unlimited height adjustments between the ascending position and the descending position. The range of height adjustment covers the existing stretcher and hospital bed. Height adjustment is more convenient for surface-to-surface transfer. In addition, the hydraulic high-low allows caregivers to position patients at a comfortable working height for patient care and transfer, and can improve the sitting comfort of short and tall patients.

The caregiver can move each chair 20, 400 to a "straight-line flat" position, that is, the back support surface 36, 424 is roughly the same plane as the seat support surface 40, 428, respectively. The caregiver can move the chair 20, 400 to a straight-line flat position It uses handles 70 and 450 to provide caregivers with a "real" flat position, such as minor operations, patient inspections, and the like, without the need to transfer patients to another surface.

The chairs 20 and 400 also provide Tandland Fort positioning and reverse Tandland Fort positioning in an infinite number of adjustment modes. The caretaker can use the handle 66 to activate the Tandland Fort positioning of the chair 20, and the caregiver can The handle 446 is used to activate the Tandland Fort position of the chair 400, and the Tandland Fort position is locked until the caregiver is ready to reposition the patient.

The chairs 20, 400 also include unlimited types of lean controls (handles 70, 450) that can be used by both patients and caregivers. The lean controls allow the back 35 and leg sections 34, 42 and 422, 430 to be relative to the seat section. 38, 426 lean on any selected position between the sitting position and the platform position. Once the caregiver releases the handle 70, 450, the back, seat and leg sections 34, 38, 42 and 422, 426, 430 are still fixed to each other. Even when the patient is moving.

Each chair 20, 400 also includes push rods 64, 442, which can be held by the caregiver when the caregiver moves the chair 20, 400 across the floor 62. Each chair 20, 400 also includes a central wheel 82 contacting the floor 62 to facilitate the operation of the chair 20, 400 during the transportation of the chair 20, 400, and to assist the chair 20, 400 to move sideways when the chair 20, 400 is fixed . The brake-operating pedals 80, 456, and 494 control the braking and releasing of the rear casters 60, and the movement of the center wheel 82 to contact and disengage from the floor 62.

The chair 20, 400 mechanism for controlling the vertical movement, tilt movement, and articulation movement of the patient support body 32, 420, respectively, is delicately configured to greatly reduce the size of the chair 20, 400. For example, in the chair 400 shown in FIG. 14, the driving device 114, the scissor linkage mechanism 476, the control assembly 470, the middle frame 468, the step frame 466, and the bottom frame 492 when the patient support 420 is in the sitting position They are all located between the front end 410 of the seat section 426 and the handle 443 of the push rod 422, and below the back and the seat sections 422, 426.

Although the present invention has been described in detail with reference to specific preferred examples, its changes and modifications still exist within the spirit of the present invention defined in the scope of the following application.

Movable nursing chair