JP2007117475A - Toilet seat lifting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet seat lifting device used a damper apparatus excellent in quietness without using oil. <P>SOLUTION: An air damper mechanism 7 is formed of: a cylindrical cylinder 71 extending from the lower surface of a top member 53 of a slider 5 toward the fixed surface 21 of a fixed plate 2; and a piston 72 which is arranged in the cylinder 71, formed a sealed space in the cylinder 71 and supported on the side of the fixed plate 2. Moreover, at the top plate member 53, a communication hole 76 communicated with the sealed space 73 is formed, and an earthenware mortar 76a in the shape of the earthenware mortar whose opening area is expanded in a direction separated from the sealed space 73 centering on an axis L1 with the relative movement of the cylinder 71 and the piston 72 is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a toilet seat lifting / lowering device for lifting a toilet seat when cleaning a Western-style toilet.

In a Western-style toilet, the toilet seat and toilet lid rotate around the back, resulting in a prone posture and a standing posture. For this reason, even if it is going to clean the back of the upper surface of a toilet bowl main body, since only a very narrow gap is vacant between a toilet bowl main body and a toilet seat, it cannot reach. Therefore, from the toilet side, the guide member on which the rack is formed is raised, and a pinion is provided on the slider that supports the toilet seat so that the slider can be moved up and down along the guide member. A toilet seat lifting device has been devised. In addition, the toilet seat lifting device disclosed herein is configured such that when the slider is lowered by providing a rotary damper device for the pinion, the slider is not rapidly lowered (see, for example, Patent Document 1).
JP-A-9-28619

  Recently, a toilet seat lifting and lowering device integrated as a toilet seat unit with a damper device that reduces the speed when the toilet seat and toilet lid are tilted by its own weight, and further integrated as a toilet seat unit with an electric mechanism that electrically opens and closes the toilet lid. Since these mechanisms are also lowered together with the slider, it is necessary to prevent the slider from falling rapidly against all these loads. However, since the damper device is used under such a hard condition, there is an increased risk of breakage. In particular, the rotary damper device as described in Patent Document 1 contains a viscous liquid such as oil, and there is a problem that the oil leaks out due to breakage and contaminates the toilet seat.

  In view of the above problems, an object of the present invention is to provide a toilet seat lifting / lowering device that uses a damper device that does not use oil and is excellent in silence.

  In order to solve the above problems, in the present invention, a seat plate serving as a fixing portion to a Western-style toilet bowl body, a guide member rising from the seat plate, and configured to be movable up and down along the guide member, In the toilet seat lifting apparatus having an attached slider, an air damper mechanism that exerts a drag force on the slider when the toilet seat is lowered is provided between the seat plate and the slider, and the air damper mechanism includes: A cylinder provided on one side of the seat plate and the slider, and a piston provided on the other side of the seat plate and the slider to form a sealed space in the cylinder, A communication hole through which gas in the sealed space flows is formed in the slider or the piston in association with the relative movement with the piston, and the communication hole is formed from the sealed space. Characterized in that it has a mortar unit opening area in the direction is formed in the widened mortar shape about the axis away from the enclosed space extending in the direction between.

  In the present invention, it is preferable that the mortar portion has an angle formed by two inclined surfaces centering on the axis line of 120 degrees or less in a cross section including the axis line. If comprised in this way, since the gas discharge | released from the communicating hole will spread | diffuse smoothly, it will become difficult to generate | occur | produce a vortex in the vicinity of a communicating hole, and generation | occurrence | production of noise can be suppressed.

  In the present invention, it is preferable that the opening end surface on the side where the opening area of the mortar portion is widened is formed on the bottom surface of the recess formed on the end surface on the discharge side from which the gas from the sealed space is released. In that case, it is preferable that the said recessed part is formed in the extension line | wire of two slopes centering on this axis, or the outer side in the cross section of the mortar part of the direction including the said axis line. If comprised in this way, since there is no obstruction on the extended line of the slope of a mortar part, the gas discharge | released from the communicating hole can be diffused smoothly. Moreover. Since dust can be collected around the mortar at the bottom of the recess, the amount of dust entering the sealed space can be reduced.

  In the present invention, the cylinder extends from one member of the seat plate and the slider toward the other member, and the piston protrudes from the other member into the cylinder. Preferably it is. If comprised in this way, a damper apparatus can be comprised at low cost.

  In the present invention, the piston is configured to be movable together with the cylinder, and when the toilet seat is raised, there is a first stopping means for stopping the raising of the piston against the raising of the cylinder in the middle of the raising. And when the toilet seat is lowered, there is a second stopping means for stopping the lowering of the piston against the lowering of the cylinder in the middle of the lowering, and the lowering of the piston by the second stopping means. After being stopped, the air damper mechanism preferably exerts a drag force on the cylinder as the cylinder descends. If comprised in this way, the collision speed just before a toilet seat collides with a toilet bowl main body can fully be decelerated, and damage to a toilet seat can be prevented reliably. Moreover, since the piston can be shortened by an amount corresponding to the distance that the piston moves, the toilet seat lifting device can be downsized in the moving direction of the slider.

  In the present invention, it is preferable that biasing means for biasing the slider upward is provided between the seat plate and the slider. If comprised in this way, a big force will not be required for lifting a toilet seat, but a toilet seat can be easily lifted from a toilet bowl main body. Even if the toilet seat is lowered with weight, all the load is not applied to the air damper mechanism, so that the gas in the sealed space of the air damper mechanism is not suddenly released from the communication hole. Therefore, noise can be suppressed and silence can be achieved.

  In the toilet seat lifting / lowering device of this embodiment, the damper device includes a cylinder provided on one side of the seat plate and the slider, and a piston provided on the other side of the seat plate and the slider that forms a sealed space in the cylinder. Since the air damper mechanism is configured, a damper action can be obtained without using oil. In addition, a communication hole through which gas in the sealed space flows is formed in the slider or piston with relative movement between the cylinder and the piston, and this communication hole is centered on an axis extending in a direction away from the sealed space. It has a mortar-shaped mortar part with an opening area extending in a direction away from the sealed space. Therefore, noise when the gas from the sealed space is released through the communication hole can be suppressed, and silence can be achieved.

  An example of a toilet seat lifting / lowering apparatus to which the present invention is applied will be described with reference to the drawings.

(overall structure)
1 (a) and 1 (b) are explanatory diagrams showing a state in which the toilet seat is lowered and an explanatory diagram showing a state in which the toilet seat is lifted from the toilet body in the western toilet unit using the toilet seat lifting / lowering apparatus to which the present invention is applied. It is. 2A to 2D are a plan view, a front view, a right side view, and a front view of the toilet seat lifting apparatus to which the present invention is applied, with the movable plate removed. FIG. 3 (a)
(B) is a schematic sectional drawing in the AA line of Fig.2 (a), and a schematic sectional drawing in the BB line of Fig.2 (a).

As shown in FIG. 1 (a), a Western-style toilet unit of this embodiment includes a Western-style toilet body 11, a toilet seat 12 that is opened and closed on the toilet body 11, and a toilet lid 13 that is opened and closed on the toilet seat 12. The toilet seat 12 and the toilet lid 13 are rotated around the back to assume a prone posture and a standing posture. Here, the toilet seat 12 and the toilet lid 13 are integrated as a toilet seat unit, and in this toilet seat unit, a damper device that reduces the speed when the toilet seat 12 and the toilet lid 13 are flattened by their own weight as necessary. In some cases, an electric device for electrically opening and closing the toilet lid is incorporated.

In any of these cases, as shown in FIG. 1 (b), the western toilet unit of the present embodiment manually lifts the toilet seat 12 (toilet seat unit) from the toilet body 11 and the upper surface of the toilet body 11 is The toilet seat lifting / lowering device 1 that can be cleaned is configured.

As shown in FIGS. 2 (a) to 2 (d) and FIGS. 3 (a) and 3 (b), the toilet seat lifting / lowering device 1 according to the present embodiment is fixed to the upper surface portion of the toilet body 11 (see FIG. 1). Fixing plate 2 with 21 (
Seat plate), an inverted L-shaped stopper plate 3 fixed with screws to the upper end portion of the vertical surface 22 bent upward at the rear end of the fixing plate 2, a horizontal portion 31 of the stopper plate 3, and the fixing plate 2 Two cylindrical guide shafts 41 and 42 (guide members) spanned between the fixed surface 21 and the two guide shafts 41 and 42. 4
A slider 5 that can slide up and down along 2 is supported.

The slider 5 includes bearing portions 51 and 52 having guide holes 511 and 521 into which the guide shafts 41 and 42 are inserted, and a top plate portion 53 that connects upper end portions of the bearing portions 51 and 52. The movable plate 6 is attached to the slider 5 so as to cover the front surface and the top plate portion 53, and the toilet seat 12 (toilet seat unit) is attached to the upper surface of the horizontal portion 60 of the movable plate 6.

(Stopper configuration)
In the left and right bearing portions 51, 52 of the slider 5, square holes 55 are opened in portions facing the vertical surface 22 of the fixed plate 2. Each of the square holes 55 has an engagement member 95 inside.
Is arranged so as to be able to advance and retreat in the horizontal direction, and a spring 97 for urging the engaging member 95 toward the vertical surface 22 of the fixed plate 2 is arranged in the back.

On the other hand, on the vertical surface 22 of the fixed plate 2, a lower concave portion in which the distal end portion of the engaging member 95 enters a position below the line through which the engaging member 95 passes when the slider 5 is moved up and down. 98 is formed on the left and right, and an upper concave portion 99 into which the tip of the engaging member 95 enters is formed on the left and right.

Therefore, the engagement member 95 on the slider 5 side, the spring 97, and the lower concave portion 98 on the vertical surface 22 side of the fixed plate 2 set the holding position of the slider 5 when the toilet seat 12 (toilet seat unit) is lowered. It functions as a first stopper 91 to be defined. Further, the engaging member 9 on the slider 5 side.
5 and the spring 97 and the upper concave portion 99 on the vertical surface 22 side of the fixed plate 2 function as a second stopper 92 that defines the holding position of the slider 5 when the toilet seat 12 (toilet seat unit) is raised.

(Configuration of damper and biasing means)
In the toilet seat lifting / lowering device 1 configured as described above, in this embodiment, the fixing surface 2 of the fixing plate 2 is used.
1 and the top plate portion 53 of the slider 5 are disposed with an air damper mechanism 7 that exerts a drag on the slider 5 when the toilet seat 12 (toilet seat unit) is lowered.

In configuring this air damper mechanism 7, in this embodiment, a cylindrical cylinder 71 extends from the lower surface of the top plate portion 53 of the slider 5 toward the fixed surface 21 of the fixed plate 2.

  On the other hand, although the piston 72 is disposed in the cylinder, the lower end of the piston 72 is not attached to the fixed surface 21 of the fixed plate 2. That is, a cylindrical body 78 extending from the lower end opening of the cylinder 71 to an intermediate position in the cylinder 71 is attached to the stationary surface 21 of the stationary plate 2 in an upright posture. A hole 781 is formed. From the central hole 781, the piston 72 is inserted into the cylindrical body 78 and supported so as to be movable in the sliding direction of the slider 5 while being guided by the inner wall of the central hole 781. A large-diameter head 74 is formed at the upper end of the piston 72. An O-ring 75 is attached to the head 74 in the circumferential groove, and the outer diameter of the O-ring 75 and the inner wall of the cylinder 71 are set to press-fit dimensions. A large-diameter engaging protrusion 77 having an engaging portion 771 is formed at the lower end portion of the piston 72.

  Therefore, in the operation of moving the slider 5 from the solid line state in FIG. 3 to the two-dot chain line state as the toilet seat 12 is raised, the engaging portion 771 moves to the peripheral edge 784 of the central hole 781 as the first stop means. Until the abutment, the piston 72 moves together with the slider 5 due to friction between the O-ring 75 and the inner wall of the cylinder 71 due to the press-fitting relationship. However, when the engaging portion 771 comes into contact with the peripheral edge 784 of the center hole 781 as the first stopping means, the movement of the piston 72 is prevented, so that the O-ring 75 and the inner wall of the cylinder 71 slide, Only the slider 5 moves. Therefore, the head 74 located behind the cylinder 71 relatively moves to the vicinity of the opening of the cylinder 71.

  On the contrary, when the slider 5 is moved from the two-dot chain line state of FIG. 5 to the solid line state as the toilet seat 12 is lowered, the lower end surface of the engagement protrusion 77 of the piston 72 serves as the second stop means. The piston 72 moves together with the slider 5 due to friction between the O-ring 75 and the inner wall of the cylinder 71 due to the press-fitting relationship between the O-ring 75 and the inner wall of the cylinder 71 until halfway against the fixing surface 21 of the fixing plate 2. However, when the lower end surface of the engagement protrusion 77 of the piston 72 comes into contact with the fixing surface 21 of the fixing plate 2 as the second stopping means, the movement of the piston 72 is prevented, so that the 0 ring and the inner wall of the cylinder 71 Slides and only the slider 5 moves. Therefore, the head 74 in the vicinity of the opening of the cylinder 71 relatively moves to the back of the cylinder 71.

  In the case of this embodiment, the effect as an air damper is that only the slider 5 moves after the lower end surface of the engagement projection 77 of the piston 72 abuts against the fixed surface 21 of the fixed plate 2 as the second stopping means. When the piston 72 moves together with the cylinder 71, the effect of the air damper cannot be obtained. However, in order to prevent the toilet seat from being damaged, it is sufficient that the collision speed when the toilet seat collides with the toilet body is sufficiently reduced, and the effect of the air damper can be obtained only in the second half when the toilet seat 2 is lowered. There is no problem. According to this embodiment, since the distance corresponding to the distance to which the piston 72 moves can be shortened, the toilet seat lifting / lowering device 1 can be downsized in the moving direction of the slider 5.

  In addition, a communication hole 76 communicating with the sealed space 73 is formed in the top plate portion 53 corresponding to the back end surface of the cylinder 71.

  4 (a) and 4 (b) are a perspective view of the mortar portion viewed obliquely from above and a cross-sectional view for explaining the mortar portion shown in FIG. As shown in FIGS. 3 and 4, the top plate portion 53 has a communication hole 76 extending in the direction of the axis L <b> 1 (see FIG. 4B) at the center thereof and communicating with the sealed space 73. The hole 76 is composed of a small hole portion 76d having a diameter of about 0.2 mm, a mortar portion 76a, and a concave portion 76b recessed toward the sealed space 73 in this order from the sealed space 73 side. The mortar portion 76a is formed in a mortar shape having an opening area extending in a direction away from the sealed space 73 with the axis L1 as the center. Specifically, as shown in FIG. In the included cross section, the angle formed by the two inclined surfaces L2 and L3 with the axis L1 as the center is set to 59 degrees. However, the angle formed by the two inclined surfaces L2 and L3 is not necessarily limited to 59 degrees, and is released through the communication hole 76 if it is 120 degrees or less, preferably in the range of 30 to 90 degrees. Gas noise can be reduced. In addition, the side where the opening area which is one opening end surface of the mortar part 76a spreads is opened to the bottom face 76c of the recessed part 76b.

Further, the bottom surface 7c of the concave portion 76b is formed wider than one opening end surface of the mortar portion 76a, and the concave portion 76a has two inclined surfaces centering on the axis line in cross sections including the axis L1 of the mortar portion 76a. Extension lines L2 and L3 (see FIG. 4B). Therefore, the gas discharged from the sealed space 73 forming the recess 76a can be smoothly diffused without being disturbed by the recess 76a.

Furthermore, in this embodiment, an assist spring 8 (biasing means) made of a compression coil spring is disposed between the fixed surface 21 of the fixed plate 2 and the top plate portion 53 of the slider 5. Here, the assist spring 8 is coaxially disposed around the cylinder 71, and the cylinder 71 also serves as a guide portion of the assist spring 8.

  FIG. 5 is a graph showing the force acting on the toilet seat when the toilet seat mounted on the slider is lifted and lowered in the toilet seat lifting apparatus to which the present invention is applied. In the graph shown here, the load on the toilet seat 12 in the absence of the assist spring 8 is 50 N, and the force (holding force) required to disengage the first stopper 91 and the second stopper 92 is 30 N. It is expressed as

First, in FIG. 5, when an assist spring 8 having an urging force of 70 N when the slider 5 is in the downward direction and the urging force decreasing to 55 N while the slider 5 moves upward is used as the assist spring 8, The acting load is represented by a thick line L1. Therefore, in order to lift the toilet seat 12 from the state shown in FIG. 1A, a force of 10 N or more may be applied to the toilet seat 12 when releasing the engagement with the first stopper 91, and the first seat After the engagement with the stopper 91 is released, the toilet seat 12 is automatically raised by the urging force of the assist spring 8 without applying a force to the toilet seat 12, and then by the engagement with the second stopper 92. In the state shown in FIG.
The toilet seat 12 automatically stops.

When the toilet seat 12 is lowered from this state, a force for compressing the assist spring 8 is applied in addition to a force of 30 N for releasing the engagement with the second stopper 92, and the toilet seat Although a large force is applied as the seat 12 is lowered, since the air damper mechanism 7 is configured for the slider 5, the lowering speed of the seat 12 can be increased even when the weight is applied to the seat 12. Safe because it is slow. Further, since the lowering speed is slow, the toilet seat 12 does not collide violently with the toilet body 11, and the toilet seat 11 or the like is not damaged.

Moreover, since the slider 5 is held by the first stopper 91 even when the urging force of the assist spring 8 is larger than the weight of the toilet seat 12 and the mechanism that moves up and down integrally with the toilet seat 12, the toilet seat 12 is inadvertently removed from the toilet body 11. It will not float up. Even when the biasing force of the assist spring 8 is smaller than the weight of the toilet seat 12 and the mechanism that moves up and down integrally with the toilet seat 12, the slider 5 can be
Since it is held at 2, there is no further descent.

(Effect of this embodiment)
In this embodiment, the air damper mechanism 7 includes a cylindrical cylinder 71 extending from the lower surface of the top plate member 53 of the slider 5 toward the fixed surface 21 of the fixed plate 2, and the cylinder 71 disposed in the cylinder 71. And a piston 72 supported on the fixed plate 2 side, which forms a sealed space. Therefore, a damper action can be obtained without using oil. Moreover, a communication hole 76 communicating with the sealed space 73 is formed in the top plate member 53, and a mortar shape having an opening area widened in a direction away from the sealed space 73 around the axis L1 in the communication hole 76. It has a mortar portion 76a. Therefore, noise when gas from the sealed space 73 is released through the communication hole 76 can be suppressed, and silence can be achieved.

  In the present embodiment, in the mortar portion 76a, the angle formed by the two inclined surfaces L2 and L3 centering on the axis L1 is set to 59 degrees in the cross section including the axis L1. For this reason, since the gas released from the mortar portion 76a diffuses smoothly, vortices are hardly generated in the vicinity of the mortar portion 76a, and the generation of noise can be suppressed.

  In this embodiment, the bottom surface 7c of the concave portion 76b is formed wider than one opening end surface of the mortar portion 76a. Therefore, dust that has fallen into the concave portion 76b accumulates around the mortar portion 76a, and thus enters the sealed space 73. The amount of garbage can be reduced. Moreover, since the recess 76b is formed outside the two extended lines L2 and L3 of the inclined surface centered on the axis L1 in the cross sections in all directions including the axis L1 of the mortar portion 76a, Since no obstacle is formed on the extension lines L2 and L3, the gas released from the communication hole 76 can be diffused smoothly.

  In the present invention, the cylinder extends from one member of the seat plate and the slider toward the other member, and the piston protrudes from the other member into the cylinder. Therefore, the damper device can be configured at a low cost.

  In this embodiment, when the piston 72 is configured to be movable together with the cylinder 71 and the toilet seat 12 is raised, the peripheral edge 784 of the central hole 781 that stops the rise of the piston 72 against the rise of the cylinder 71 in the middle of the rise. When the toilet seat 12 is lowered, it has a fixed surface 21 that stops the lowering of the piston 72 against the lowering of the cylinder 71 in the middle of the lowering, and the lowering of the piston 72 is stopped by the fixing surface 21. Thereafter, the air damper mechanism 7 exerts a drag on the toilet seat 12 as the cylinder 71 descends. Therefore, the collision speed immediately before the toilet seat 12 collides with the toilet body 11 can be sufficiently reduced, and the toilet seat 12 can be reliably prevented from being damaged. Moreover, since the piston 72 can be shortened by an amount corresponding to the distance that the piston 72 moves, the toilet seat lifting / lowering device 1 can be downsized in the moving direction of the slider 5.

In this embodiment, since the assist spring 8 that biases the slider 5 upward is provided between the fixed plate 2 and the slider 5, a large force is not required to lift the toilet seat 12. It can be easily lifted from the toilet body 11. Even if the toilet seat 12 is lowered with weight, the load is not applied to the air damper mechanism 7, so that the gas in the sealed space of the air damper mechanism 7 is not suddenly released from the communication hole. Therefore,
The noise of the air damper mechanism 7 can be suppressed and the toilet seat lifting / lowering device 1 can be silenced.

(Other embodiments)
In the above embodiment, the recess 76b is provided, but the recess 76b is not necessarily required. When the concave portion 76 b is not provided, the side of the mortar portion 76 a on which the opening area that is one opening end surface is widened is configured to open in the same plane as the top surface of the top plate member 53.

Moreover, in the said embodiment, although the compression coil spring (assist spring 8) was used as an urging means to always urge the toilet seat 12 upward, various springs such as a tension coil spring may be used.

  Further, in the above embodiment, the cylinder 71 is formed on the slider 5 side and the piston 72 is formed on the fixed plate 2 side. However, the piston 72 is formed on the slider 5 side and the cylinder is formed on the fixed plate 2 side. 71 may be configured.

(A), (b) is explanatory drawing which shows the state which raised the toilet seat, and the state which raised the toilet seat from the toilet body main body in the western style toilet unit using the toilet seat raising / lowering apparatus to which this invention is applied, respectively. . (A) thru | or (d) are the top views, the front view, the right view, and the front view of the state which removed the movable plate of the toilet seat raising / lowering apparatus to which this invention is applied. (A), (b) is a schematic sectional drawing in the AA line of Fig.2 (a), and a schematic sectional drawing in the BB line of Fig.2 (a). (A), (b) is the perspective view which looked at the mortar part from diagonally upward shown in FIG. 3, and sectional drawing for demonstrating a mortar part. In the toilet seat lifting / lowering apparatus to which the present invention is applied, when the toilet seat attached to the slider via the movable plate is lifted / lowered, it is a graph showing the force acting on the toilet seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet seat elevating device 2 Fixing plate 5 Slider 7 Air damper device 8 Assist spring (biasing means)
21 Fixed surface (second stopping means)
41, 42 Guide shaft (guide member)
71 Cylinder 72 Piston 73 Sealed space 76 Communication hole 76a Mortar portion 76b Recess 76c Bottom surface 784 First stop means

Claims (7)

In a toilet seat lifting apparatus having a seat plate that is a fixed portion to a western toilet body, a guide member that rises from the seat plate, and a slider that is configured to be movable up and down along the guide member and to which the toilet seat is attached.
Between the seat plate and the slider, there is an air damper mechanism that exerts a drag force on the slider when the toilet seat is lowered, and the air damper mechanism is on one side of the seat plate and the slider. And a piston provided on either side of the seat plate and the slider, which forms a sealed space in the cylinder, and the cylinder and the piston move along with the relative movement between the cylinder and the piston. A communication hole through which gas in the space flows is formed in the slider or the piston, and the communication hole has an opening area extending in a direction away from the sealed space around an axis extending in a direction away from the sealed space. A toilet seat lifting apparatus having a mortar portion formed in a mortar shape.   The toilet seat lifting / lowering device according to claim 1, wherein the mortar portion has an angle formed by two inclined surfaces with the axis as a center in a cross section including the axis.   In Claim 1 or 2, the opening end surface of the side where the opening area of the said mortar part expanded is formed in the bottom face of the recessed part formed in the end surface of the discharge | release side from which the gas from the said enclosed space is discharge | released. A toilet seat lifting device.   4. The toilet seat according to claim 3, wherein the recess is formed on an extension line of two inclined surfaces centering on the axis or on the outside thereof in a cross section in any direction including the axis of the mortar part. lift device.   5. The cylinder according to claim 1, wherein the cylinder extends from one member of the seat plate and the slider toward the other member, and the piston extends from the other member to the cylinder. A toilet seat lifting and lowering device characterized by protruding toward the inside.   6. The first stop means according to claim 5, wherein the piston is configured to be movable together with the cylinder, and when the toilet seat is lifted, the first stop means for stopping the lift of the piston against the lift of the cylinder in the middle of the lift. And having second stop means for stopping the lowering of the piston against the lowering of the cylinder during the lowering when the toilet seat is lowered, and the lowering of the piston by the second stopping means The toilet seat lifting and lowering device is characterized in that the air damper mechanism exerts a drag force on the cylinder when the cylinder is lowered after the cylinder is stopped. 7. The toilet seat lifting / lowering apparatus according to claim 1, further comprising a biasing unit that biases the slider upward between the seat plate and the slider.

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