Floor suction head for an electrical vacuum cleaner

Floor vacuum head of electric vacuum cleaner

The present invention relates to a floor suction head of an electric vacuum cleaner used in general households.

Figures 16 to 20 show the first example of the floor suction head of the conventional electric vacuum cleaner shown in Japanese Patent Laid-Open No. 61-240929. Figure 16 is its perspective view, and Figure 17 is its bottom view. Figure 18 is a side view showing the state of cleaning the carpet with its floor vacuum head, Figure 19 is a side view showing the state of cleaning the floor with a floor vacuum head, and Figure 20 is a side view showing the state of cleaning the floor with its floor vacuum head. View of its state.

In Figures 16 to 20, 1 is a slightly rectangular upper shell, and 2 is the same as the lower shell, which is connected by a bumper bar 3 formed of a soft material, so that the upper and lower shells 1, 2 and the bumper bar are connected 3 constitutes the vacuum head body 15. 4 is bent into a slightly u-shaped elbow, one end is rotatably sleeved in the vertical plane to the upper and lower shells, and the other end is sleeved in the connecting pipe 5. The 6 system is equipped with the same elbow 4. It is directionally rotatably installed on the front wheels of the lower housing 2 and installed between the housing 2 and the ground to ensure a certain gap.

7 is a suction air passage with an open outer end formed by a groove formed along the longitudinal direction of the lower casing 2, and a straight line shape is formed from the right end to the left end of the floor suction head. The suction air path 7 is connected to the suction port 8 in the center, and the air path connected to the dust chamber of the electric vacuum cleaner body 18 is formed through the flexible hose 17 with the elbow 4, the connecting pipe 5, and the side operation part 16 . In addition, the brush body 10 in which the brush of the lip 9 made of flexible material such as rubber is planted into a bundle is installed at the rear of the suction air duct 7 approximately the entire width of the floor suction head, and the structure can be constituted by the adjustable body 11. The amount of protrusion from the lip 9 and the outer shell 2 under the brush body 10 is adjusted. The adjustment body 11 switches operations according to the type of the surface to be cleaned: "carpet", "floor, straw mat".

If you want to use the floor vacuum head of the first conventional example to clean the carpet, operate the adjusting body 11 to set the lip 9 and the brush body 10 to the state shown in Fig. 18, that is, to accommodate the lip 9 in the lower housing 2 At the same time, the brush body 10 protrudes longer than the bottom of the lower shell 2 at the same time. Therefore, the lower half of the weakening brush 10 increases the deflection as shown in the figure, as a state of being sandwiched between the lower shell 2 and the carpet, so as to reduce the frictional resistance when the floor suction head moves on the carpet.

Moreover, if you want to use the floor cleaner of the first conventional example to clean the floor, operate the adjusting body 11 to set the lip 9 and the brush body 10 to the state shown in Fig. 19, even if the lip 9 and the brush body At the same time, the lower shell 2 protrudes shortly below. Therefore, the lip piece 9 is brought into contact with the ground, and the suction port 8 is closed behind the lip piece 9 to increase the vacuum degree of the suction port, so that a strong suction airflow can be obtained. On the one hand, the short-protruding brush body 10 can fully support the floor suction head by strengthening the lower half, so it can be coordinated with the front wheels 3 to ensure a certain gap with the ground, and prevent the lower shell 2 from damaging the ground.

Then, in this way, after switching the operation adjustment body 11 depending on the type of surface to be cleaned, the user holds the side operation portion 16 of the flexible hose 17 as shown in FIG. Move back and forth in the same direction to absorb garbage on the ground. The longitudinal direction of the floor vacuum head is at right angles to the direction of action, and because it can take a spacious cleaning area, it can effectively achieve cleaning. Since the front wheel 6 rotates in the direction of action, the front wheel 6 and the brush body 10 can move without damaging the ground before reducing the operating force.

The garbage on the ground or the garbage on the side of the ground vacuum head can move in the front and back direction of the ground vacuum head, and is absorbed by the suction air path 7 installed on the full width of the vacuum head on the ground, through the suction port 8, the elbow 4, and the connecting pipe 5. , The flexible hose 17 is guided into the dust collection chamber of the main body 18 of the electric vacuum cleaner.

The brush body 10 installed behind the suction air duct 7 is configured to hook and catch thread scraps on the carpet. Since the width of the brush body 10 is installed on the entire width of the floor suction head, no thread scraps are left.

Figure 21 is a bottom view of the floor vacuum head of the second example of the floor vacuum head of the conventional electric vacuum cleaner as shown in Japanese Patent Laid-Open No. 3-195526. In the figure, the part corresponding to the first conventional example is Append the same symbol.

In Fig. 21, 21 is a spherical caster mounted on the left and right ends of the lower shell 2 that can rotate 360 degrees. It is arranged in front of and behind the suction port 8 so that the feathers 22 expanding outward are formed at both ends, and the height of the feathers 22 are in contact with the ground, and slits 23 are installed at many positions.

For the floor vacuum head of the second conventional example, since the ball caster 21 can freely rotate 360 degrees, the movement of the floor vacuum head increases in the front and rear direction, and can also be moved diagonally or laterally, resulting in an improved degree of freedom of operability By. In addition, when the feather 22 is in contact with the ground, the vacuum degree of the dust suction part 24 including the feather 22 surrounding the suction port 8 is increased, and the dust suction performance is improved. Moreover, for the garbage in the front part of the outer periphery of the floor suction head, it is still formed that the slit 23 installed in the feather 22 can absorb the garbage.

<p>However, in the first conventional example in which the elbow 4 is only rotated vertically to the vacuum head body 15 to be inserted and installed, since the vertical direction of the floor vacuum head is horizontal, when cleaning furniture and furniture gaps, it is lower than the floor. When the horizontal width of the suction head is narrow, the floor suction head cannot enter the cleaning surface, and even though the horizontal elbow 4 still makes the floor suction head slightly inclined, it only slightly reduces the horizontal width and cannot enter the gap. Therefore, it is not necessary to remove the floor vacuum head from the connecting pipe 5 and replace it with a vacuum head for gaps.</p><p>This kind of problem is that the elbow 4A is inserted into the suction head body 15 in the longitudinal direction as shown in Figs. 22 and 23, and the elbow 4A can be rotated 90 degrees in the horizontal plane with respect to the suction head body 15 However, at this time, since the lip 9 and the brush body 10 are formed parallel to the moving direction of the floor vacuum head and act as the side shielding body of the floor vacuum head, not only can it not suck the garbage on the wall, but also A new problem of so-called thread scraps on the carpet has occurred. And because the axis of the front wheel 6 is at right angles to the normal moving direction of the floor vacuum head (used in a horizontally long state), as shown in Figure 22, if the vacuum head body 15 is set to be vertically long (extended along the moving direction of the vacuum head) ) That is, the wheel 6 cannot be rotated, which not only increases the operating force, but also has the problem of so-called scars on the ground due to the edge of the front wheel 6. In spite of this problem, if the angle of the elbow is adjusted to the vacuum head body in the horizontal plane, it can be reported by those in Japan's Mikoto Sho 45-23188 or Nippon Mikosho 42-18061. Take out as an example.</p><p>Moreover, 360-degree rotatably spherical casters 21 are installed on the left and right ends of the lower housing 2, while feathers 22 are arranged before and after the suction port 8, and slits 23 are installed at most positions of the feathers 22 on one side (front). The second practice example is the same as the first practice example described above. The feather 22 on the other side (rear) acts as a shielding body. Not only can it not suck off the garbage on the wall, but also the part of the ball caster 21 that is not straight, the ground The operation of the vacuum head is difficult, and the floor vacuum head cannot be moved where it is thought of. If you want to move it reluctantly, there is a problem of increasing the burden on the wrist.</p><p>Moreover, when the carpets are usually fixed or planted, the operating force is very heavy on the carpets, and there is also the problem of the so-called inability to move the floor vacuum head.</p><p>The technical lesson of the present invention is that not only the cleaning of the ordinary floor cleaning surface and the narrow place can also be carried out without changing the floor suction head, but also the operating force can be reduced even if the brush is used.</p>

<p>The floor suction head of the electric vacuum cleaner of the first invention of this case is composed of the following structure. That is, in the floor vacuum head of the electric vacuum cleaner formed by connecting the elbow to the vacuum head body formed by the slightly rectangular upper and lower shells, the connection part of the vacuum head body and the elbow is equipped with wheels and air ducts. Rotary plate that rotates in conjunction with the horizontal rotation of the elbow.</p><p>In addition, the floor suction head of the electric vacuum cleaner according to the second invention of the present application is the latter with wheels arranged in front of the suction port of the rotating plate.</p><p>Furthermore, the floor suction head of the electric vacuum cleaner according to the third invention of the present application has the air path position of the rotary plate set between the wheels.</p><p>In addition, the floor suction head of the electric vacuum cleaner of the fourth invention of the present application is attached to both sides of the rotating plate at the front edge of the lower casing, and has a plurality of rows of small grooves.</p><p>Furthermore, regarding the floor suction head of the electric vacuum cleaner of the fifth invention of this application, the brush body is installed on the rotating plate.</p><p>Furthermore, the floor suction head of the electric vacuum cleaner according to the sixth invention of the present application is attached to the sliding surface in contact with the upper and lower casing rotating plates, and the concave and convex ribs are formed.</p><p>In addition, the floor suction head of the electric vacuum cleaner of the seventh invention of the present application is attached to the bottom of the lower casing to form a slightly cross-shaped suction air path centered on the suction port of the lower casing.</p><p>Moreover, the floor vacuum head of the electric vacuum cleaner of the eighth invention of the present application is attached to many places around the rotating plate, and the keyway is formed at an angle of 90 degrees. At the same time, the lower housing is installed with a longitudinal advance and retreat system that is detached from the keyway. Any kind of interlock release lever that can be operated externally.</p><p>Moreover, regarding the floor vacuum head of the electric vacuum cleaner of the ninth invention of the present application, when interlocking each key groove of the rotary plate, the relationship between the vacuum head body and the longitudinal direction of the vacuum head is perpendicular to the rotary plate. The position is such that it is arranged in the longitudinal direction of the suction head to face the opposite side of the interlock release lever operation part.</p><p>In addition, the floor suction head of the electric vacuum cleaner of the tenth invention of the present application can slidably set the edge of the key groove with the rib convex surface of the upper and lower shells, and at the same time, a hole communicating with the suction air path is installed at the lower part of the key groove.</p><p>Furthermore, the floor suction head of the electric vacuum cleaner of the eleventh invention of the present application is connected between the elbow and the revolving plate, has a square hole and a ring-shaped guide plate integrated with the revolving plate, and one end is located between the ring-shaped guide plate The square hole is formed in a square tube connected by a hinge, and at the same time, the other end side and one end of the elbow are installed in the vertical plane to form a coupling that connects the cylinder freely.</p><p>In addition, the floor vacuum head of the electric vacuum cleaner of the twelfth invention of the present application is slidably connected to the ribs and convex portions of the upper and lower shells to set the edge of the keyway, and at the same time, the coupling or the ring guide plate is installed and Holes connected by key grooves.</p><p>In addition, the floor suction head of the electric vacuum cleaner of the thirteenth invention of the present application is installed at the end of the lower housing on the opposite side of the interlock release lever operating part in the longitudinal direction. .</p>

Figure 1 is an exploded perspective view showing the overall structure of the floor vacuum head of an electric vacuum cleaner according to an embodiment of the present invention, Figure 2 is a bottom view of its assembled state, and Figure 3 is a perspective view of its normal clean state. Figure 4 is an oblique view showing its clean state in a narrow place, Figure 5 is a bottom view of its clearance clean state, Figure 6 is a state drawing when the connecting pipe is held near the ground in its clearance clean state, and the first Figure 7 is a vertical cross-sectional view showing the relationship between the elbow and the rotating plate, Figure 8 is an oblique view showing the rotating plate is set to the down state, and Figure 9 shows the rotating plate and the release lever in the normal cleaning state. The vertical cross-sectional view of the closed state, Figure 10 is a cross-sectional view showing the state of the rotating plate and the release lever in the normal cleaning mode, and Figure 11 is the bottom view of the floor vacuum head in the normal cleaning mode, and the 12th The figure is a cross-sectional view showing the state that the release lever is released from being attached to the rotating plate. Figure 13 is a cross-sectional view showing the rotating state of the rotating plate. The cross-section of the rods in the attached state. Figure 15 is the bottom view of the floor vacuum head in its clearance cleaning configuration.

In each figure, 31 is a slightly rectangular upper shell, and 32 is the same lower shell, which is connected by a soft bumper bar 33, whereby the upper and lower shells 31, 32 and bumper bar 33 constitute the suction head body 30. 34 The holes 31a and 32a installed at the center of 32 are inserted from the bottom as a horizontally rotatable rotating plate for the main body 30 of the vacuum cleaner. As shown in Figure 9, the flange portion 34a contacts the section of the lower housing 32 The portion 32b is formed to specify the insertion depth from below. 35 is an annular guide plate integrated with the rotating plate 34 into the holes 31a, 32a of the upper and lower housings 31, 32 from above. The suction head body 30 and the rotating plate 34 are formed to be horizontally rotatable at the same time. 36 series of couplings, one end of which is inserted into a square tube 36a formed inside each guide plate 35 that can be inserted into the square hole 35a, and the other end is formed on the cylinder 36b, and is rotatably positioned at the part of the cylinder 36b. One end 37a of the elbow 37 is connected in the vertical plane. On both sides of the outer side of the square tube 36a of the coupling 36, there are provided protrusions 36c that can be inserted into the holes 35b of the side walls of the square holes 35a of each guide plate 35, so that the coupling 36 and the guide plate 35 can be hinged. In combination, the square tube 36a forming the coupling 36 as shown in Fig. 7 can be rotated in the square hole 35a with the hinge as the center.

Therefore, the elbow 37 is horizontally rotatable by the rotating plate 34, and is freely rotatable in the vertical plane by the hinge portion of the coupling 36, and is connected to be aligned with the aforementioned vertical plane by the coupling 36 and the cylinder 36b. The direction of intersection can rotate freely in the vertical plane. In addition, the guide plate 35 does not necessarily have to be a double-parallel structure, for example, a one-piece structure, and the hinge joint hole of the coupling 36 is formed by a long groove-shaped slot-shaped notch formed at the upper end thereof, and the coupling 36 After assembling, it is sufficient to perform the separation prevention processing of the coupling 36.

The 38 series interlock release lever is installed to be movable along the guide rib 32c installed in the longitudinal direction of the downward housing 32. The coil spring 39 often stores kinetic energy on the inner side (the direction of fastening), and is interlocked by a fork-shaped interlock formed at its front end. The plate 38a is inserted into the first key groove 34b installed on the rotating plate 34 or the second key groove 34c formed by changing the direction of 90 degrees from the first key groove 34b, so as to form the installation angle of the rotating plate 34 and the lower housing 32 It can be fixed, and the first key groove 34b is inserted into the clean state (Fig. 3, 10, 11), and the second key groove 34c is inserted into the state to adopt the clearance clean state (No. Figure 4, Figure 14, Figure 15). Moreover, the interlock release lever 38 has an operating lever 38b protruding from a long hole 31b formed on the upper housing 31 so as to be operable from the outside.

The rotating plate 34 is provided with a suction port 34d at the approximate center of its bottom surface as shown in Figure 8, and at the same time, the first air passage 34e and the second air passage connected to the suction port 34d are formed by crossing the suction port 34d in a T shape. 34f, on the lower surfaces of the three T-shaped air passages 34e, 34f divided into three, wheels 41a, 41b, 41c rotating in the same direction toward the elbow 37 are mounted. Two wheels (wheels 41a, 41b) are arranged on the front side and one (wheel 41c) on the rear side, and are usually formed so that three points of the wheels 41 support the cleaner head body 30. Furthermore, behind the suction port 34d under the rotating plate 34, the brush bodies 42 are installed in a horizontal row, so that the brush bodies 42 and the rotating plate 34 are integrally rotated in a horizontal plane.

Under the lower casing 32, a horizontal suction air passage 43 formed in the longitudinal direction with the suction port 34d as the center and an open outer end is installed. The longitudinal side suction air passage 44 at the end is normally clean, the air passage 44a on the front side of the suction port 34d of the longitudinal side suction air passage 44 and the T-shaped air passages 34e and 34f of the horizontal side suction air passage 43 and the rotary plate 34 In the clearance clean state, the air passage 43a located in front of the suction port 34d of the horizontal suction air passage 43 and the vertical suction air passage 44 are formed so as to communicate with the T-shaped air passages 34e and 34f of the rotating plate 34, and so on. When connected, the suction port 34d of the rotating plate 34 penetrates the guide plate 35, the coupling 36, the elbow 37, the connecting pipe 5, and the flexible hose not shown to form a connection to the inside of the electric vacuum cleaner body. Dust room.

Moreover, a brush body 45 is also arranged behind the lower surface of the lower housing 32 so that the brush body 42 of the rotating plate 34 overlaps a part of the brush body in the longitudinal direction. In addition, short-length brush bodies 46 are also installed on both sides of the lower front surface of the lower casing 32.

In addition, two auxiliary wheels 47 are installed at a position opposite to the longitudinal interlock release lever operating portion of the lower housing 32, that is, at the end of the position that becomes the rear side in the clearance clean state. When the auxiliary wheel 47 is tied to the ground, the suction head is parallel to the ground, and its installation position is set at a height that does not touch the ground.

Moreover, concave and convex ribs 32e are installed on the sliding surfaces 32d in contact with the rotating plates 34 of the upper and lower casings 31 and 32, so that even though sand particles enter these contact parts, they can still escape into the recesses of the ribs 32e, thereby preventing sand particles from being trapped. On the sliding surface 32d, the rotation prevention plate 34 cannot rotate.

Moreover, as shown in FIG. 9, the lower part of each keyway 34b, 34c of the rotating plate 34 is formed in the dust box 48, and the dust box 48 of each keyway 34b, 34c is received by the rotation of the rotating plate 34 The grit garbage that enters the recess of the rib 32e.

Moreover, in the lower part of the dust box 48, that is, the inner walls of the key grooves 34b, 34c, as shown in Fig. 9, a communication hole 49 connected to the suction air path of the coupling 36 is formed so as to absorb through the coupling 36 The grit garbage received by the dust box 48.

In addition, a central hole 51 is installed on one of the protrusions 36c of the hole 35b of the guide plate 35 of the coupling 36 as shown in Fig. 9 so that the key groove 34b communicates with the suction air passage of the coupling 36, In order to absorb the sand-grained waste which is thus received by the dust collecting box 48. In addition, although the hole for absorbing the garbage received by the dust collecting box 48 is installed on the rotating plate 34 or the coupling 36 as an example, it can also be directly installed on the guide plate 35 in addition to this.

Moreover, as shown in Figs. 11 and 12, on both sides of the rotating plate 34 at the front edge of the lower housing 32, a plurality of rows of small groove air passages 52 are arranged so that the small groove air passage 52 can absorb the vicinity of the front edge of the floor suction head Trash.

When the floor suction head of the electric vacuum cleaner of this embodiment cleans a spacious floor, the interlock plate 38a of the interlock release lever 38 and the rotating plate are shown in Figs. 3, 10, and 11 The first key groove 34b of 34 is sleeved and fixed at a position where the longitudinal direction of the floor suction head is at right angles to the direction of the elbow 37, and the state is maintained by the coil spring 39. The wheels 41a, 41b, 41c, which are integrally installed with the rotating plate 34, are set so that their rotating surfaces are in the same direction as the elbow 37. Since they are configured to rotate back and forth against the floor brush, they are not only used on the floor but also when matting. Moreover, the operating force is still reduced on the carpet due to the wheel effect.

In this normal clean state, since the air passage 44a and the lateral suction air passage 43 located in front of the suction port 34d of the vertical suction air passage 44 of the lower casing 32 are connected to the T-shaped air passages 34e and 34f of the rotating plate 34 Therefore, the garbage on the ground is sucked by the air passage 44a and the lateral suction air passage 43 through the T-shaped air passages 34e and 34f due to the front and rear movements of the floor suction head, and is absorbed by the suction port 34d of the rotating plate 34, and is connected through the guide plate 35. The shaft 36, the elbow 37, the connecting pipe 5, and a flexible hose not shown are guided into the dust collection chamber inside the electric vacuum cleaner body. At this time, the garbage on the front side of the floor suction head is concentrated toward the suction port 34d through the air path 34f installed between the wheels 41a and 41b, so that wire chips etc. will not be entangled on the wheels 41a and 41b or their rotating shafts.

Since the brush body 42 on the rotating plate 34 and the brush body 45 on the lower housing 32 installed on the rear side of the suction inlet 34d form the total width of the floor suction head, it is possible to capture thread scraps on the carpet without omission.

Secondly, when cleaning a narrow place, the operating portion 38b of the interlock release lever 38 is slid outward against the stored power of the coil spring 39, and the interlock plate 38a at the tip is pulled out by the first key groove 34b as shown in Figure 13 to release It is coupled with the rotating plate 34, and is rotated 90 degrees in its state to form the elbow 37. The position is opposite to the operating portion 38b of the interlock release lever 38, and is placed at the position where the elbow 37 and the suction head body 30 are aligned in the longitudinal direction. Open operation. Therefore, the interlock release lever 38 has the interlock plate 38a at the front end inserted into the second keyway 34c due to the stored kinetic capacity of the coil spring 39, and the ground is placed as shown in Figs. 4, 14, and 15. The suction head is fixed in the state of the gap clean state. When this form of the voids in the cleaning, since the elbow 37 is located opposite to the locking release position of the operation portion 38b of the lever 38, thus releasing the interlock operation portion 38b of the lever 38 will not interfere with the elbow 37. Therefore, the operation part after returning to the normal cleaning state becomes easy to operate.

In this clearance clean state, since the air passage 43a and the longitudinal side suction air passage 44 located in front of the suction port 34d of the horizontal suction air passage 43 of the lower casing 32 are connected to the T-shaped air passages 34e and 34f of the rotary plate 34 Therefore, the garbage on the ground is absorbed by the air passage 43a and the longitudinal suction air passage 44 through the T-shaped air passages 34e and 34f due to the front and rear movement of the floor vacuum head, and is absorbed by the suction port 34d of the rotating plate 34, and passes through the guide plate 35 , coupling 36, elbow 37, the connecting pipe 5, and a flexible hose (not shown) may be guided in the interior of the electric vacuum cleaner main body dust collecting chamber. Wheels 41a, 41b, 41c system and the rotating plate 34 integrally changing the angle which the plane of rotation in the same direction toward the bend 37, whereas for the ground prior to operation of the rotary brush. Therefore, the brush body 42 provided behind the suction port 34d of the rotating plate 34 also rotates in the horizontal plane at the same time as the rotating plate 34, and is arranged at a right angle to the moving direction of the floor suction head and is pre-arranged to have an approximately horizontal width. Therefore, no thread scraps on the carpet will be left. In addition, since the suction air path is also formed in the front and left and right directions for the movement direction of the floor suction head, the front and left and right wall wastes are effectively absorbed.

Since the elbow 37 is mounted on the suction head body 30 via a coupling 36 that has been hinged to the guide plate 35 on the side of the rotating plate 34, it can rotate freely in the vertical plane of the moving direction of the floor suction head. the flexible tube may still hand close to the ground portion of the cleaning operation of the void space height restrictions, in this state that the floor cleaning head still held parallel to the ground state.

Should be cleaned when the height of the void space greatly restricted, the user may be considered an allowable range of the hinge joint of the hand over the elbow aspects of the operation of the flexible tube portion close to the ground. At this time, the suction head body 30 rotates with the longitudinal front end as a fulcrum to float its longitudinal front end, but if it is in this state, as shown in Figure 6, the auxiliary wheel 47 is rotated in contact with the ground to prevent it from turning on the ground. The longitudinal front end of the suction head damages the ground. The auxiliary wheel 47, regardless of the cleaning mode, when the floor suction head is parallel to the ground, the installation position is set at a height that does not touch the ground. Therefore, as long as the aforementioned inclination does not occur, it will not contact the ground, and it will not affect the performance of the floor suction head. Mobile operation. In addition, the cushioning device provided to prevent interference with the ground due to the inclination of the floor suction head is not limited to the auxiliary wheels 47. For example, a blanket may be used. In addition, it is also possible to use low-friction materials, or slightly thicker plates with low-friction processing, to cover the corners of the floor suction head.

The interlock release lever 38 sets the coupling direction with the rotating plate 34 in the longitudinal direction of the lower housing 32. Therefore, when the movement operation of the floor vacuum head is frequently repeated to perform the normal cleaning mode, the interlock release lever 38 is moved instantaneously in the direction of the wall surface by inertia force even if the front surface of the floor vacuum head strongly collides with the wall surface, and the interlock release lever is instantaneously moved. The coupling direction of 38 and the movement direction of the floor brush (the direction of generating inertial force) are still in a cross relationship, so the interlocking plate 38a will not be separated from the key groove of the rotating plate 34.

Since the sliding surface 32d contacting the rotating plate 34 of the upper and lower shells 31, 32 is equipped with concave and convex ribs 32c, the sand and dust entering between the rotating plate 34 and the upper and lower shells 31, 32 can enter the recesses of the ribs 32e and can rotate automatically Surface removal can prevent poor rotation caused by grit garbage.

Furthermore, because the bottom part of each key groove 34b, 34c of the rotating plate 34 is provided with a dust box 48 for receiving sand particles entering the recess of the rib 32c, and at the same time, it can be installed in accordance with the communicating hole 49 formed in the inner wall of the key groove or installed in the The central hole 51 of the protrusion 36c of the coupling 36 communicates between the dust box 48 and the suction air passage. Therefore, sand particles will not accumulate in the recess of the rib 32e, and the rotation of the rotating plate 34 can be maintained for a long time.

[Effects of Invention]

As described above, according to the first invention of the present application, since the connecting part of the vacuum cleaner body and the elbow is equipped with a rotating plate that has wheels and air passages and rotates in conjunction with the horizontal rotation of the elbow, the surface to be cleaned can be seen Changing the state of the vertical and elbow angle of the floor vacuum head can achieve cleaning in a narrow place. At the same time, the wheels rotate in the direction of action of the floor vacuum head. Improve the convenience of use.

In addition, according to the second invention of the present application, since wheels are arranged before and after the suction port of the rotating plate, the operability when changing the direction of the floor suction head during cleaning is improved, and at the same time, the gap with the floor can be always stably maintained.

In addition, according to the third invention of the present application, since the position of the air passage of the rotating plate is set between the wheels, the garbage can be collected toward the suction inlet through the air passage between the wheels. Therefore, it is possible to prevent wire chips and the like from being entangled on the wheel or its rotating shaft.

In addition, according to the fourth invention of the present application, since a plurality of rows of small groove air passages are arranged on both sides of the rotating plate at the front edge of the lower casing, the small groove air passages can absorb the garbage near the front edge of the floor suction head and improve the dust collection efficiency.

In addition, according to the fifth invention of the present case, because the brush is installed on the rotating plate, the brush body and the rotating plate rotate in a horizontal plane, and the moving direction of the floor suction head is often in contact at right angles, which has nothing to do with the cleaning form. It can improve the thread-taking performance on the carpet.

In addition, according to the sixth invention of the present case, because the sliding surface contacting the upper and lower casings of the rotary plate is formed with concave and convex ribs, the sand and garbage entering between the rotary plate and the upper and lower casings can enter the recesses of the ribs and can be removed by the rotary surface. , Which can prevent poor rotation caused by grit garbage.

In addition, according to the seventh invention of this case, a slightly cross-shaped suction air passage is formed under the lower casing with the suction port of the lower casing as the center. Therefore, it has nothing to do with the clean state. Garbage and garbage near both sides.

In addition, according to the eighth invention of the present case, the key groove is formed at most of the peripheral surface of the rotating plate so as to be offset from each other by 90 degrees. At the same time, the lower shell is provided with a removable key groove in any key groove. The interlock release lever is externally operated. Therefore, when the normal cleaning mode of the floor vacuum head movement operation is frequently repeated, even if the front surface of the floor vacuum head is strongly collided with the wall surface, it will not be disconnected from the key groove of the rotating plate due to inertial force. Lock release lever can improve reliability.

In addition, according to the ninth invention of this case, since the elbow defines the position between the rotating plate and the interlocking of each key groove of the rotating plate, it is formed perpendicular to the suction head body toward the longitudinal direction of the suction head. The arrangement can be formed along the longitudinal direction of the vacuum cleaner with the interlock release lever operating part facing the opposite side, so the interlock release lever operating part will not be formed under the elbow, and the cleaning mode can be easily operated during the switching operation. Fingers will not be pinched between the elbow and the vacuum head body, ensuring safety.

In addition, according to the tenth invention of this case, since the edge of the keyway is slidably connected to the rib convex part of the upper and lower shells, and a hole communicating with the suction air passage is installed at the lower part of the keyway, the sandy waste It will not accumulate in the recesses of the ribs and can maintain good rotation of the rotating plate over a long period of time.

In addition, according to the 11th invention of this case, a ring-shaped guide plate with a square hole and integrated with the rotating plate is installed between the elbow and the rotating plate, and one end is formed in the square hole of the ring-shaped guide plate. In the direction of the hinge connection, the other end side is formed in the vertical plane with one end of the elbow to rotatably connect the cylinder coupling, so the rotating plate can be rotated horizontally, and the hinge of the coupling The part is rotatable in the vertical plane, and the elbow is freely rotatable in the vertical plane connected with the cylinder of the coupling to the direction orthogonal to the above-mentioned vertical plane, which increases the degree of freedom and improves the operability. Therefore, despite the height restriction in the space to be cleaned, the hand-operated part of the flexible hose can still be close to the ground, and the ground suction head can be kept parallel to the ground despite this state.

In addition, according to the twelfth invention of this case, the edge of the keyway is set in a manner that can be slidably connected to the rib convex surface of the upper and lower shells, and a hole communicating with the keyway is installed on the coupling or the ring guide plate, so Sand garbage will not accumulate in the recesses of the ribs, and the rotation of the rotating plate can be maintained for a long time.

In addition, according to the thirteenth invention of the present application, since the end of the position opposite to the operation portion of the interlock release lever in the longitudinal direction of the lower housing is provided with a buffer device that only contacts the floor when the head body is tilted, the floor suction head When tilting to the ground, the buffer device can touch the ground, which can prevent the ground from being damaged.

<p>30Vacuum head body</p><p>31Upper shell</p><p>32Lower shell</p><p>32dSliding surface</p><p>32eConcave and convex ribs</p><p>34Rotating plate</p><p>34b, 34cKeyway</p><p>34dSuction port</p><p>34e,34fThe wind path of the rotating plate</p><p>35Annular guide plate</p><p>35asquare hole</p><p>35bHole (hinge joint)</p><p>36Coupling</p><p>36asquare tube</p><p>36bCylinder</p><p>36cProtrusion (hinge joint)</p><p>37Elbow</p><p>38Interlock release lever</p><p>38bOperating part of interlock release lever</p><p>41a, 41b, 41cwheel</p><p>42Brush body of rotating plate</p><p>43Horizontal suction air duct (cross-shaped suction air duct)</p><p>44Longitudinal suction duct (cross-shaped suction duct)</p><p>47Auxiliary wheel (buffer device)</p><p>49Connecting hole (hole connected to the wind path)</p><p>51Central hole (connecting hole between wind path and key groove)</p><p>52Xiaogou Wind Road</p>

Fig. 1 is an exploded perspective view showing the overall structure of the floor suction head of the electric vacuum cleaner according to an embodiment of the present invention.

Figure 2 is a bottom view of the floor suction head of the electric vacuum cleaner of this embodiment.

Fig. 3 is a perspective view showing the normal cleaning state of the floor suction head of the electric vacuum cleaner of this embodiment.

Fig. 4 is a perspective view showing the state of the clearance cleaning state of the floor suction head of the electric vacuum cleaner according to this embodiment.

Fig. 5 is a bottom view showing the state of the clearance cleaning state of the floor suction head of the electric vacuum cleaner according to this embodiment.

Fig. 6 is a state diagram when the connecting pipe of the floor suction head of the electric vacuum cleaner of this embodiment is held near the floor.

Fig. 7 is a longitudinal sectional view showing the relationship between the elbow and the rotating plate of the floor suction head of the electric vacuum cleaner of this embodiment.

Fig. 8 is a perspective view showing that the rotary plate of the floor suction head of the electric vacuum cleaner according to the present embodiment is set to the down state.

Fig. 9 is a longitudinal sectional view showing a state in which the rotating plate and the release lever are connected in a normal cleaning mode of the floor suction head of the electric vacuum cleaner according to this embodiment.

Fig. 10 is a cross-sectional view showing the coupling state of the rotating plate and the release lever in the normal cleaning mode of the floor suction head of the electric vacuum cleaner according to this embodiment.

Fig. 11 is a bottom view of the floor vacuum head of the electric vacuum cleaner according to this embodiment when it is in a normal cleaning mode.

Fig. 12 is a cross-sectional view showing a state in which the cleaning head release lever of the electric vacuum cleaner according to this embodiment is operated to release its engagement with the rotating plate.

Fig. 13 is a cross-sectional view showing the rotating state of the rotating plate of the floor suction head of the electric vacuum cleaner according to this embodiment.

Fig. 14 is a cross-sectional view showing a state in which the main rotating plate and the release lever are engaged when the gap cleaning mode of the floor suction head of the electric vacuum cleaner according to this embodiment is used.

Figure 15 is a bottom view of the floor vacuum head when the gap cleaning mode of the floor vacuum head of the electric vacuum cleaner of this embodiment is concerned.

Figure 16 is a perspective view showing the floor suction head of the electric vacuum cleaner of the first conventional example.

Figure 17 is a bottom view of the floor suction head of the electric vacuum cleaner of the first conventional example.

Fig. 18 is a side view showing the carpet cleaning state of the floor vacuum head of the electric vacuum cleaner of the first conventional example.

Figure 19 is a side view showing the floor cleaning state of the floor vacuum head of the electric vacuum cleaner of the first conventional example.

Figure 20 is a diagram showing a state where the floor vacuum head of the electric vacuum cleaner of the first conventional example is cleaned by the user.

Figure 21 is a bottom view of the floor suction head of the electric vacuum cleaner of the second conventional example.

Figure 22 is an explanatory diagram illustrating the conventional problems.

Figure 23 is an explanatory diagram illustrating the conventional problems.