Damper

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention relates to a lid that rotates downward to open, a toilet seat of a Western-style toilet that rotates downward to close, and a damper for preventing the toilet lid from suddenly rotating downward to make a bang. ..

【0002】

[Conventional technology]

According to Japanese Patent Application Laid-Open No. 2-16839, the applicant has introduced two rotating tubular cam bodies in which a plurality of chevron cams are provided on the cylindrical wall in the circumferential direction, and a sliding tubular cam body. Are concentrically opposed in the housing, and the above-mentioned movement of the lid and toilet seat rotating downward is transmitted to the rotating tubular cam body, whereby when the rotating tubular cam body rotates in one direction, We proposed a damper that slides the sliding tubular cam body in one direction against the return spring in the housing by the cam action of the Yamagata cams, and brakes the downward rotation of the lid and toilet seat to make it quiet. ..

【0003】

[Problems to be Solved by the Invention]

In the above prior proposal, when the rotating tubular cam body rotates in one direction, the sliding tubular cam body compresses the air inside the housing and gradually pushes the air out from the small holes provided in the housing. The braking force is obtained. Since the air in the housing is extruded to the outside in this way, a viscous liquid such as silicone oil cannot be used for braking. Further, when the open lid is closed or these are rotated upward to open the closed toilet seat or toilet lid, the rotating tubular cam body tends to rotate in the opposite direction. However, since the chevron cam is in a state of meshing with the chevron cam of the sliding tubular cam body, it cannot rotate in the opposite direction independently, and the sliding tubular cam body is pushed by the return spring to the outside of the housing. The rotation of the rotating tubular cam body in the opposite direction is damped by the slow sliding in the opposite direction in which air is sucked into the housing through the small hole. That is, the downward rotation of the lid, the toilet seat, etc. is braked, and the upward rotation is also braked.

【0004】

[Means for solving problems]

Therefore, the present invention makes it possible to obtain the braking force even with a viscous liquid other than air, and brakes the downward rotation of the lid, the toilet seat, etc., but does not brake the upward rotation, so that the return can be performed quickly. This is related to the damper, which has one end and the other end, a housing in which the fluid is sealed inside, and two rotating tubular cam bodies provided with a plurality of chevron cams separated from each other in the circumferential direction on the cylindrical wall. , And a sliding tubular cam body, a rotating tubular cam body 20 on one end side and a sliding tubular cam body 30 on the other end side in the housing 10, and a chevron cam of both cam bodies. The sliding tubular cam body 30 is provided with a valve cylinder member 40 having a flange 42 and a small hole 43 at the bottom, with the fellows 21 and 31 meshing with each other and concentrically facing each other in the housing. Is movably and loosely fitted axially toward the other end of the housing, and the cam body is pressed toward one end of the housing between the other end of the housing 10 and the sliding tubular cam body 30. It is characterized by providing a spring 50.

【0005】

[Example]

In the illustrated embodiment, reference numeral 10 denotes a housing, which comprises a tubular case 11 having one end open and the other end closed, and a cap 12 attached to the open end of the tubular case by snap engagement. For snap engagement, a snap claw 13 is provided on the outer circumference of the open end of the tubular case, and an engagement port 14 is provided on the cap.

【0006】

Reference numeral 20 denotes a rotating tubular cam body, and 30 is a sliding tubular cam body. Both tubular cam bodies are provided with two chevron cams 21, 31 on the cylindrical wall at equal intervals in the circumferential direction. As shown in FIG. 5, the chevron cams 21 and 21 of the rotating tubular cam body have a cam slope 22 at the tip of one of the two sides parallel to the axial direction. This rotating tubular cam body has a cylindrical portion 23 whose tip 23 ́ is closed and which is fitted to the inner circumference of the chevron cams 31 and 31 of the sliding tubular cam body, and the inner circumference 24 of the cylindrical portion 23 is It has an oval or square shape corresponding to the outer shape of the end of the rotating shaft such as a lid or a toilet seat, and the open end 25 of the cylindrical portion 23 fits into the circular hole 15 of the cap 12.

【0007】

As shown in FIG. 4, the chevron cams 31 and 31 of the sliding tubular cam body have one side parallel to the axial direction and a cam slope 32 on the other side. In this embodiment, the cam slope 32 is composed of a plurality of cam surfaces having various slopes, and the tip of the chevron cams 31 and 31 is provided with a protrusion 33 protruding from the outer circumference. The protrusion 33 engages with a slit 16 provided in the axial direction at a phase of 180 ° on the inner circumference of the tubular case 11, and the sliding tubular cam body can move in the axial direction inside the housing, but rotates. Is to prevent you from doing so.

【0008】

The two chevron cams 31 and 31 of the sliding tubular cam body are provided along the peripheral edge of the end plate 34, and the end plate 34 has a circular center and a radial shape around the circular portion 35A. It has a petal-shaped valve hole 35 provided with a plurality of notches 35B. Further, the end plate 34 has a concentric cylindrical portion 36 protruding in the axial direction opposite to the chevron cam 31.

【0009】

Reference numeral 40 denotes a valve cylinder member, which has a blind cylinder 41 that is slidably fitted to the circular portion 35A at the center of the valve hole 35 and a collar 42 that projects from the open end of the blind cylinder. A small hole 43 is provided in the center of the bottom of the. The above-mentioned tubular case 11, cap 12, rotary tubular cam body 20, sliding tubular cam body 30, and valve cylinder member 40 are molded of plastic.

【0010】

To assemble the damper, the blind cylinder 41 of the valve cylinder member is inserted into the circular portion 35A of the valve hole 35 on the end plate 34 from the inside of the cylindrical portion 36 of the sliding tubular cam body, and the valve cylinder member is inserted into the valve hole 35. A washer 44 that comes into contact with the end plate 34 is attached to the tip of the blind cylinder 41 in order to prevent the valve cylinder member from coming off from the sliding cylinder cam body. When the washer 44 comes into contact with the end plate 34, a plurality of claws 45 project inward from the inner circumference of the annular plate portion so as not to block the radial cut portion 35B of the valve hole 35. Use a toe that bites into the outer circumference of the blind tube 41 (see Fig. 4B). An urging spring (coil spring in this embodiment) 50 that presses the sliding tubular cam body into the tubular case 11 toward the open end of the tubular case, a sliding tubular cam body 30, and a rotating tubular cam. Put the body 20 in that order, engage the chevron cams 31, 21 of both cam bodies 30, 20 and finally put the cap 12 on the open end of the tubular case 11 and attach it by snap engagement. An O-ring 51 is fitted on the outer circumference of the cylindrical portion 36 of the sliding tubular cam body and the outer circumference of the end portion 25 of the cylindrical portion of the rotating tubular cam body to seal between the inner circumference of the tubular case. To do.

【0011】

As a result, two spaces A and B on the left and right are created inside the tubular case 11 constituting the housing 10 and separated by the end plate 34 of the sliding tubular cam body. The left space A is closed by the closed end 11 ́ of the tubular case, and the right space B is the closed end 23 ́ of the cylindrical part of the rotating tubular cam body and the outer circumference of the open end 25 of the cylindrical part. It is closed by the O-ring 51. Both spaces A and B communicate with each other through a small hole 43 at the bottom of the blind cylinder 41 of the valve cylinder member 40 and a radial notch 35B of the valve hole 35 formed in the end plate 34. If the inside of the housing 10 is filled with a liquid such as silicone oil instead of air, the liquids are filled in the spaces A and B at the time of assembly.

【0012】

To use the housing 10, the housing 10 is fixed, the end of the shaft such as the lid and the toilet seat is pushed into the inner circumference of the cylindrical portion of the rotating tubular cam body, and the rotation of the lid and the toilet seat is transmitted to the rotating tubular cam body. Figures 1A and 1B show the state of the damper when the lid and toilet seat rotate upward, the lid is closed, and the toilet seat is open. At this time, the collar 42 of the valve cylinder member is separated from the end plate 34 to the left, and therefore the spaces A and B are communicated with each other not only by the small hole 43 of the valve cylinder member but also by the notch 35B of the valve hole of the end plate 34. ing. Since the sliding tubular cam body is pressed to the right by the urging spring 50, the volume of the left space A is large, while the volume of the right space B is small.

【0013】

When the rotation due to its own weight to open the closed lid or close the open toilet seat is transmitted to the rotating tubular cam body (Fig. 1C), the cam slopes of the two chevron cams 21 and 21 of the rotating tubular cam body. 22 rides on the cam slope 32 of the two chevron cams 31 and 31 of the sliding tubular cam body. Since the protrusion 33 of the sliding tubular cam body engages with the slit 16 on the inner circumference of the tubular case and cannot rotate, the urging spring 50 is acted on by the component force that causes the cam slope 22 to ride on the cam slope 32. And guided by the slit 16, it is pushed to the left together with the end plate 34 and presses the space A. As a result, the pressure in the space A increases, the collar 42 of the valve barrel member receives the pressure, the valve barrel member moves to the right, and the collar abuts on the end plate 34 to close the notch 35B of the valve hole 35. .. The movement of the valve tube member 40 is performed immediately after the rotation is transmitted to the sliding tubular cam body, and thereafter, air or liquid in the space A enters the space B only through the small hole 43 of the valve tube member. Since it cannot flow in, the downward rotation speed of the lid and toilet seat is dampened and quietly rotates according to the viscosity of air and liquid and the flow rate of air and liquid passing through the small hole 43, such as the cross-sectional area of the small hole 43. To do. In this way, the sliding tubular cam body 30 is gradually pushed to the left against the urging spring 50, and along with this, the air and liquid in the space A flow into the space B through the small hole 43, and the volume of the space A becomes large. The volume gradually decreases, and the volume of space B gradually increases. When the lid and toilet seat become horizontal, the state shown in Fig. 2A and B is reached, and the urging spring 50 is compressed to the maximum, and the chevron shape. The engagement of cams 21 and 31 becomes shallow.

【0014】

When the horizontal lid or toilet seat is rotated upward by hand, the rotating tubular cam body moves in the direction in which the cam slope 22 of the chevron cam 21 separates from the cam slope 32 of the chevron cam 31 of the sliding tubular cam body. Rotate. As the cam slope 22 moves away from the cam slope 32, the compressed urging spring 50 pushes the sliding tubular cam body to the right by the restoring force, and the cam slope 32 of the chevron cam is pushed by the rotating tubular cam body. Follow the cam slope 22. When the sliding tubular cam body moves to the right due to the restoring force of the urging spring, the end plate 34 presses the space B, the pressure in the space B increases, and this pressure is applied to the notch in the valve hole. From 35B, it acts on the collar 42 of the valve barrel member and the bottom of the blind cylinder 41 of the valve barrel member. Therefore, as shown in FIG. 2C, the valve barrel member 40 moves to the left, its collar 42 separates from the end plate 34 to the left, and air or liquid in the space B flows into the small hole 43 of the valve barrel member 40 and the end plate. It flows into space A from both the notches 35B of the valve holes of 34. Therefore, by raising the lid or toilet seat by hand, the sliding tubular cam body moves to the right by the restoring force of the urging spring to follow the rotation speed of the rotating tubular cam body that rotates in the opposite direction, and the space At the same time as the volume of A gradually increases, the volume of space B becomes smaller by that amount, the engagement of the chevron cams 21 and 31 becomes deeper, and when the lid and toilet seat return to the standing position slightly beyond the vertical, The damper returns to the state shown in Fig. 1A and B.

【0015】

In addition to fitting the blind cylinder 41 of the valve cylinder member 40 to the circular portion 35A of the valve hole 35, the outer circumference of the flange 42 of the valve cylinder member is fitted to the inner circumference of the cylindrical portion 36 of the sliding tubular cam body. It is preferable that both of them accurately guide the movement of the valve barrel member 40. In this case, since the collar 42 prevents the air or liquid in the space B from flowing into the space A through the notch 35B of the valve hole 35, the collar 42 has a hole or a notch along the peripheral edge. Open multiple 46.

【0016】

Further, in order to prevent air and liquid in the space A from flowing into the space B only from the small hole 43 of the valve cylinder member, the flange 42 of the valve cylinder member has a chevron cross section on the surface facing the end plate 34. An annular protrusion 47 is provided, and the flange 42 abuts on the end plate 34 at the annular protrusion 47 and surrounds the notch 35B of the valve hole of the end plate to prevent air and liquid in space A from leaking into the notch 35B. It is preferable to prevent it.

【0017】

In order to prevent the blind cylinder 41 of the valve cylinder member 40 from coming off from the valve hole 35, a washer 44 is attached to the small-diameter protruding portion at the tip of the blind cylinder, and this washer is attached to the end plate 34 of the sliding cylindrical cam body 30. Although they were brought into contact with each other, for example, as shown in FIGS. 6A and 6B, a radially inward annular flange that engages the inner circumference of the cylindrical portion 36 of the sliding tubular cam body with the peripheral edge of the flange 42 of the valve cylinder member 40. 37 is provided, or as shown in FIGS. 7A and 7B, a protruding portion 38 is provided on the inner circumference of the cylindrical portion 36 inward in the radial direction and similarly engages with the peripheral edge of the flange 42 of the valve barrel member 40. When the blind cylinder 41 of the member is inserted into the valve hole 35, the flange 42 may be deformed so that the annular flange 37 and the protruding portion 38 are submerged.

【0018】

Since liquids such as silicon oil are sealed in the spaces A and B in the casing, the cam slopes 32 of the chevron cam of the sliding tubular cam body have different inclination angles as shown in the figure because they are incompressible. When configured with the slope of, the lid and toilet seat rotate downward relatively quickly halfway, and then the rotation speed gradually slows down and becomes quietly horizontal, etc. Speed control according to any setting Can be done. Further, when the encapsulation is compressible such as air, the speed control cannot be performed as set as in the incompressible liquid, but the speed control can be performed in a similar manner.

【0019】

[Effect of the invention]

As is clear from the above, since the damper of the present invention does not allow fluid to come out from the housing, a liquid such as silicone oil can be sealed to obtain a damper having a high braking force. Further, since the rotation in one direction is braked but the rotation in the opposite direction is not braked, it is possible to prevent a sudden slamming of the toilet seat and the like, and to provide a damper suitable for the purpose of quickly opening the closing. ..

[Simple explanation of drawings]

[Figure 1]

A is a side view of a damper with a cross section of the housing when the toilet seat is open and standing. B is a side view of the same damper as in FIG. 1A, which also has a cross section of the sliding tubular cam body. C is a side view of the same damper as in FIG. 1B when the toilet seat was rotated in the closing direction.

[Figure 2]

A is a side view of a damper with a cross section of the housing when the toilet seat is closed. B is a side view of the same damper as in FIG. 2A, which also has a cross section of the sliding tubular cam body. C is a side view of the same damper as in the original Figure 2B, which was moved to open the toilet seat.

[Fig. 3]

It is an exploded perspective view of a damper.

[Fig. 4]

A is a cross-sectional view of a sliding tubular cam body. B is a front view of FIG. 4A viewed from the direction of arrow B, and an enlarged view of a part thereof. C is a developed view of a chevron cam of a sliding tubular cam body.

[Fig. 5]

A is a side view of the lower half of the rotating tubular cam body in cross section. B is a front view of Fig. 5A, with one half viewed from the left and the other half viewed from the right. C is a developed view of a chevron cam of a rotating tubular cam body.

[Fig. 6]

A is a cross-sectional view showing another example of the mounting situation of the valve cylinder member and the tubular sliding cam body. B is a front view of FIG. 6A as viewed from the direction of the arrow.

[Fig. 7]

A is a cross-sectional view showing still another example of the mounting state of the valve cylinder member and the tubular sliding cam body. B is a front view of FIG. 7A as viewed from the direction of the arrow.

[Explanation of symbols]

10 housing 11 Cylindrical case 12 cap 20 rotating tubular cam body 21 Yamagata cam 22 cam slope 23 Cylindrical part 30 Sliding tubular cam body 31 Yamagata cam 32 cam slope 35 valve hole 36 Cylindrical part 40 Valve tube member 41 Blind tube 42 tsuba 43 small hole 50 urging spring