JPH0984724A - Closet seat fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closet seat fitting device having high fitting strength of a closet seat and good removing workability of the closet seat. SOLUTION: The head insertion hole 82 of a closet seat support member 72 is coupled with a head 78, a knob 102 is picked to rotate a rotary plate 94, balls 88 are brought into contact with the portions other than the recesses 90 on the peripheral face of a large-diameter section 82a, and the closet seat support member 72 is fixed to a fixed member 70. When the balls 88 are brought into contact with the portions other than the recesses 90 on the peripheral face of the large-diameter section 82a, the balls 88 are protruded from the inner peripheral face of a ring 84, the balls 88 are coupled with the groove 80 of the head 78, and the closet seat support member 72 is fixed to the fixed member 70. Even if large external force in the releasing direction is applied to the closet seat support member 72, the balls 88 are not retreated from the groove 80, and the closet seat support member 72 is not removed from the fixed member 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet seat attachment device for attaching a toilet seat or a toilet lid to a toilet bowl.
More specifically, a toilet seat mounting device comprising a fixing member fixed to a toilet bowl and a toilet seat supporting member detachable from the fixing member, and configured to support the toilet seat supporting member so as to be rotatable in the up and down direction. In regard to the above, the present invention relates to a toilet seat mounting device having an improved connection structure between the fixing member and the toilet seat supporting member.

[0002]

2. Description of the Related Art When a toilet seat or the like is attached to a toilet bowl by a toilet seat mounting device comprising a fixing member fixed to the toilet bowl and a toilet seat supporting member detachable from the fixing member, the toilet seat is removed from the toilet bowl together with the toilet seat supporting member. It is possible to sufficiently and easily clean the upper surface of the toilet bowl, including the vicinity of the root of the toilet seat.

A conventional example of such a toilet seat mounting device (actual fair 7-
No. 159) will be described with reference to FIGS.

As shown in FIG. 8, a fixing member 14 having a flat plate-shaped base 10 and bolts 12 extending downward from the base 10 is provided with a nut (not shown) for a toilet bowl 16 (9th embodiment).
It is fixed to FIG. The toilet seat support member 18 is fitted to the fixing member 14, and the lever 2 with the hooking piece 20a is attached.
Fixed by 0. The lever 20 is axially supported by the toilet seat support member 18 by a shaft 22 and is also urged by a spiral coil spring 24 in the direction of the arrow θ _{1 in} FIG. 9B.

The fixing member 14 is provided with an engaging portion 14a that engages with the hooking piece 20a.

The pin 26 mounted on the toilet seat support member 18 is engaged with the concave groove 28 of the fixing member 14, and the hooking piece 2
By engaging 0a with the engaging portion 14a, the toilet seat support member 20 is fixed to the fixing member 14 as shown in FIGS. 9 (a) and 9 (b).
Fixed to As shown in FIG. 7, the toilet seat 30 and the toilet lid 3 are attached to the shaft rod 18a protruding from the toilet seat support member 18.
Two are pivoted.

The lever 20 is moved in the direction of the arrow θ _{2 in} FIG. 9 (c).
By pulling up and turning the engaging portion 14a and the hooking piece 2
0a is disengaged and the toilet seat support member 18 is disengaged from the fixing member 14 as indicated by the arrow R in FIG. 9 (a), whereby the toilet seat 30 and the like can be removed from the toilet bowl 16.

[0008]

In the toilet seat mounting device shown in FIGS. 7 to 9, since the hooking piece 20a is engaged with the engaging portion 14a by the urging force of the spring 24, the toilet seat supporting member 18 is provided. On the other hand, when a large external force (hereinafter sometimes referred to as a detaching force) is applied in the direction of arrow R in FIG. 9 (a), the lever 20 rotates in the direction of arrow θ _{2 in} FIG. 9 (c), The toilet seat support member 18 comes off from the fixing member 14.

In order to prevent such disengagement of the toilet seat, it suffices to increase the spring constant of the spring 24. In this case, the force in the θ ₂ direction to be applied to the lever 20 when removing the toilet seat is large. As a result, the workability of removing the toilet seat becomes poor.

When removing the toilet seat, it is necessary to keep the lever 20 rotated in the direction of the arrow θ ₂ .
It is necessary to perform the operation of pulling up and holding the lever 20 and the operation of pulling up the toilet seat support member 18 at the same time, which is also inferior to the workability of removing the toilet seat.

It is an object of the present invention to solve the above problems and to provide a toilet seat attaching device which has a high toilet seat attachment strength and a good toilet seat removal workability.

[0012]

According to a first aspect of the present invention, there is provided a toilet seat mounting device including a fixing member fixed to a toilet bowl, a toilet seat supporting member detachably engaged with the fixing member, and a toilet seat supporting member. A toilet seat mounting device comprising: a lock mechanism for preventing separation from the fixing member, wherein the fixing member includes a disk-shaped head disposed on the upper surface of the toilet, and the side peripheral surface of the head has a circumferential direction. The toilet seat support member is provided with a head insertion hole into which the head is inserted, and a ring is arranged concentrically with the head in the head insertion hole. Is provided with a hole or a notch penetrating the ring in the radial direction, and a lock member is arranged in the hole or the notch so as to be movable in the radial direction,
A part of the inner peripheral surface of the head insertion hole is provided with a recess into which the outer end of the ring of the lock member can enter.
When the outer end of the ring enters the recess, the inner end of the ring retracts from the groove of the head, and the outer end of the ring inserts the head other than the recess. When the inner peripheral surface of the hole is brought into contact with the inner peripheral surface of the hole, the inner end portion of the ring is sized to be inserted into the groove of the head.

In the toilet seat mounting device according to the first aspect of the present invention, by rotating the ring, the lock member is projected from the inner peripheral surface of the ring and engaged in the groove of the head to be in the locked state (to the seat member for the seat member). Can be fixedly attached) or the lock member can be retracted from the groove to be unlocked.

According to a second aspect of the present invention, there is provided a toilet seat attachment device, which includes a fixing member fixed to a toilet bowl, a toilet seat supporting member removably engaged with the fixing member, and a detachment of the toilet seat supporting member from the fixing member. In the toilet seat mounting apparatus comprising a lock mechanism for, the fixing member includes a disk-shaped head arranged on the upper surface of the toilet, and the side peripheral surface of the head is provided with a groove in the circumferential direction, The toilet seat support member has a head insertion hole into which the head is inserted, and a ring is arranged concentrically with the head in the head insertion hole,
The ring is provided with a hole or a notch penetrating the ring in the radial direction, and the locking member is provided in the hole or the notch, and the inner end of the ring is in the groove on the side peripheral surface of the head. The head is characterized in that it is arranged so as to enter, and a cutout portion through which the inner end of the ring of the lock member can pass is provided in a part of the outer peripheral edge of the head.

In the toilet seat mounting apparatus of the second aspect, by rotating the ring, the locking member is pushed only in the groove of the head to be locked, or moved to a position where it can pass through the notch of the head. Can be unlocked.

A spherical ball is suitable as the lock member. In addition, it is preferable that the hole or notch of the ring narrows the inner peripheral side of the ring so as to prevent the lock member from falling inward.

In the case where a rotary plate connected to or integrated with the ring is arranged on the upper surface of the toilet seat support member and the ring and the head insertion hole are covered by the rotary plate. Can rotate the ring by turning the disc. By providing the rotary plate with the knob, the ring can be easily rotated.

When the ring is held by the toilet seat support member by providing the ring with an elastic piece and engaging the elastic piece with the claws provided on the inner peripheral surface of the head insertion hole, the ring is supported by the toilet seat. The member can be pushed into the head insertion hole to elastically deform the elastic piece to engage the claws with each other, and the ring can be easily attached to the toilet seat support member.

When a plurality of elastic pieces are provided and one of them is made small in height and a convex portion is provided on the toilet seat support member facing the tip end surface of the elastic piece having a small height, it is symmetrical. It is possible to mount only a ring that fits the shape of the toilet seat attachment device.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. 1 is a perspective view of a toilet seat mounting device according to an embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is a plan view, and FIG.
5 is a sectional view taken along line IV-IV and line VV of FIG. 2, FIG. 6 (a) is an exploded perspective view, and FIG. 6 (b) is B of the same (a).
It is sectional drawing which follows the -B line.

This toilet seat mounting device comprises a fixing member 70 fixed to the toilet bowl, and a toilet seat supporting member 72 detachably connected to the fixing member 70. This toilet seat support member 7
The toilet seat and the toilet lid are attached to the second shaft rod 72a.

The fixing member 70 includes a bolt 74 for fixing to the toilet bowl, a flange 76 integral with the bolt 74, and a head 78. This head 78 has a disk shape,
A groove 80 is extended in the circumferential direction on the side circumferential surface. The groove 80 has an arcuate cross section.

The toilet seat support member 72 is provided with a head insertion hole 82 into which the head 78 is inserted. The upper portion of the head insertion hole 82 has a large diameter portion 82a, and the ring 84 is inserted into the large diameter portion 82a. The ring 84 has a notch 86 penetrating in the radial direction thereof,
The ball 88 is inserted into the notch 86.

A concave portion 90 for receiving the ball 88 is provided in the large diameter portion 82a of the inner peripheral surface of the head insertion hole 82.

The ring 84 has a projection 92 protruding upward.
Is provided, and the projection 92 is provided on the toilet seat support member 72.
Is engaged with the opening 96 of the rotary plate 94 arranged on the upper surface of the.

The rotary plate 94 has a substantially disk shape, and an overhanging portion 94a is provided on a part of the outer peripheral surface thereof. The inner peripheral surface of the overhanging portion 94a is provided with a recessed strip 98 extending in the circumferential direction. One end side of the toilet seat support member 72 has an arc shape following the projecting portion 94a, and a ridge 100 that engages with the ridge 98 extends in the circumferential direction. The rotary plate 94 is rotatably engaged with the toilet seat support member 72 by the engagement of the concave stripe 98 and the convex stripe 100. The rotary plate 94 is provided with a knob 102 for rotating the rotary plate 94.

In this toilet seat support member 72, the head insertion hole 82 is fitted into the head 78, the knob 102 is gripped to rotate the rotary plate 94, and the ball 88 is moved to the large diameter portion 82a as shown in FIGS. It is fixed to the fixing member 70 by bringing it into contact with a portion other than the concave portion 90 on the peripheral surface of. That is, when the ball 88 abuts on the peripheral surface of the large-diameter portion 82 a except the recess 90, the ball 88 projects from the inner peripheral surface of the ring 84, and the ball 88 engages with the groove 80 of the head 78. As a result, the toilet seat support member 72 is fixed to the fixing member 70 via the balls 88. In this case, even if a large external force is applied to the toilet seat support member 72 in the detaching direction, the ball 88 does not retreat from the groove 80, and the toilet seat support member 72 does not come off from the fixed member 70.

When the toilet seat support member 72 is to be removed from the fixed member 70, the knob 102 is gripped to rotate the rotary plate 94, and the ball 88 is arranged at a position facing the recess 90.
When the toilet seat support member 72 is lifted in this state, the ball 8
8 retracts from the inner peripheral surface of the ring 84, and the toilet seat support member 7
2 is extracted from the fixing member 70.

In this embodiment, when one end 94A of the overhanging portion 94a is placed in contact with the stepped portion 72A of the toilet seat support member 72 as shown in FIG. 1, it is as shown in FIG. The ball 88 is placed in a place other than the recess 90. In this state, when the rotary plate 94 is rotated in the direction of arrow S in FIG. 6 to bring the end portion 94B of the overhanging portion 94a into contact with the stepped portion 72B,
The ball 88 faces the recess 90.

In the present embodiment, as shown in FIG. 4, the inner peripheral side of the notch 86 is slightly narrowed to prevent the ball 88 from falling inside the ring 84. By doing so, the workability when assembling the ball 88 and the ring 84 to the toilet seat support member 72 becomes extremely good.

In the above embodiment, the ring 84 is provided with the notch 86, but a through hole may be provided instead of this notch.

In the above embodiment, four balls are used as the ring 8.
However, the number of balls may be other than four. The number of balls is preferably 3 or more.

In the above embodiment, as shown in FIG. 6, the flange 76 of the fixing member 70 is provided with the notch 106, and the toilet seat support member 72 is provided with the protrusion 108 (which engages with the notch 106). (Fig. 5) is provided. Thus, the toilet seat support member 72 is circumferentially positioned with respect to the fixed member 70.

Another embodiment will be described with reference to FIGS. 10 to 17.

This toilet seat attaching device comprises a fixing member 170 fixed to the toilet bowl, and a toilet seat supporting member 172 detachably connected to the fixing member 170. The toilet seat and the toilet lid are attached to the shaft rod 172a of the toilet seat support member 172.

The fixing member 170 includes a bolt 174 for fixing to the toilet bowl, a flange 176 integral with the bolt 174, and a head 178. The head 178 has a disk shape, and a groove 180 is extended in the circumferential direction on the side peripheral surface thereof. The groove 180 has an arc-shaped cross section.

The head 17 is attached to the toilet seat support member 172.
8 is provided with a head insertion hole 182.
The upper part of the head insertion hole 182 has a large diameter portion 182a, and the ring 184 integral with the rotary plate 194 is inserted into the large diameter portion 182a. The ring 184 is provided with a notch 186 penetrating in the radial direction thereof.
A ball 188 is inserted in the position 6.

On the inner peripheral surface of the head insertion hole 182, a large-diameter portion 182a is provided with a recess 190 for receiving the ball 188.

As clearly shown in FIGS. 16 and 17, the ring 18
Two elastic pieces 192 and 193 are provided in the slit 4 by cutting the slit 191. This elastic piece 19
Claws 192t and 193t are provided on 2, 193 in the circumferential direction of the outer peripheral surface of the ring 184.

The claw 19 is provided on the inner peripheral surface of the large diameter portion 182a.
Claws 192T and 193T with which 2t and 193t are engaged are provided.

The rotary plate 194 is of a substantially disc shape, and the ring 184 is strongly pushed into the large diameter portion 182a.
By engaging the claws 192t, 193t with the claws 192T, 193T, the rotary plate 194 is rotatably engaged with the toilet seat support member 172. In addition, the rotating plate 194,
A knob 202 is provided for performing the rotation.

In this toilet seat support member 172, the head insertion hole 182 is fitted in the head 178, the knob 202 is picked up and the rotary plate 194 is rotated to move the ball 188 into the large diameter portion 1.
It is fixed to the fixing member 170 by being brought into contact with a portion of the peripheral surface of the 82a other than the concave portion 190. That is,
The ball 188 is a recess 190 on the peripheral surface of the large diameter portion 182a.
12 and 15 (a) when it abuts on a place other than
As described above, the balls 188 project from the inner peripheral surface of the ring 184, and the balls 188 engage with the grooves 180 of the head 178. As a result, the toilet seat support member 172 is fixed to the fixing member 170 via the ball 188. In this case, even if a large external force is applied to the toilet seat support member 172 in the detaching direction, the ball 188 does not retreat from the groove 180, and the toilet seat support member 172 does not come off the fixing member 170.

When the toilet seat support member 172 is removed from the fixed member 170, the knob 202 is picked up and the rotary plate 194 is rotated to place the ball 188 at the position facing the recess 190. When the toilet seat support member 172 is lifted in this state, the ball 188 moves to the ring 18 as shown in FIG. 15 (b).
4, the toilet seat support member 172 is pulled out from the fixed member 170.

Also in the present embodiment, it is preferable to prevent the ball 188 from falling inside the ring 184 by slightly narrowing the inner peripheral side of the notch 186. By doing so, the ball 18 is attached to the toilet seat support member 172.
8 and the rotary plate 194 are extremely easy to work with.

In the above embodiment, the ring 184 has a notch 186.
However, a through hole may be provided instead of this notch.

In the above embodiment, five balls are attached to the ring 1.
However, the number of balls may be other than five. The number of balls is preferably 3 or more.

In this embodiment, as shown in FIGS. 15 and 16, two small recesses 196 are provided on the outer peripheral surface of the ring 184 of the rotary plate 194 at a predetermined distance in the circumferential direction. As shown in FIG. 15, one small protrusion 198 is provided on the inner peripheral surface of the large diameter portion 182a of the toilet seat support member 172, and a cavity 200 is formed behind the small protrusion 198, and the vicinity of the small protrusion 198 is formed. Is a leaf spring-like head insertion hole 182.
It is elastically deformable in the radial direction.

As shown in FIG. 15, the rotary plate 194 has a range θ in which the end surface 191a facing the slit 191 abuts against the stepped portion 182b of the inner peripheral surface of the large diameter portion 182a (see FIG. 15 (b)).
However, when the rotary plate 194 rotates to the limit of rotation, the small protrusion 198 enters the small recess 196, and the operator's fingertip of the knob 202 feels a slight click feeling. It is perceived that the plate 194 has rotated to the locked or unlocked position.

In this embodiment, the claws 192t and 193t are provided so as to face each other in the diameter direction of the ring 184, but one claw 193t of the claws 192t and 193t is the other claw 192t.
Height is smaller than.

A convex portion 206 (FIGS. 11 and 14) is provided on the bottom portion of the large diameter portion 182a of the head insertion hole 182 at a position corresponding to the claw 193t having a low height. Therefore, only the rotary plate 194, in which the claw 193t faces the convex portion 194, is the head insertion hole 1 of the toilet seat support member 172.
82 can be engaged. As described above, when the toilet seat is supported by the pair of left and right toilet seat support members 172 as shown in FIG. 7, the rotating plate 19 of the left and right toilet seat support members 172 is used.
This is because the knob 202 of No. 4 is locked (or unlocked) when it is turned inside the toilet. In order to do so, the toilet seat support member 172 having a symmetrical configuration is used, and the elastic plate 1 is also used as the rotary plate 194.
The arrangement of 92 and 193 will be left and right opposite.

If the rotary plate 19 for the right toilet seat support member
If 4 is attached to the left toilet seat support member 172, the lock operation cannot be performed unless the knob 202 is rotated in the same direction (for example, clockwise direction) by the left and right toilet seat attaching devices.

In order to eliminate such a problem, the convex portion 2
06 and an elastic piece 193 having a small height are provided so that the rotary plate of the right seat support member can be mounted only in the head insertion hole 182 of the right seat support member.

That is, the rotary plate 194 of the left side toilet seat support member
Is inserted into the head insertion hole of the right toilet seat support member, the elastic piece 192 having a large height hits the convex portion 206,
Cannot be installed in the head insertion hole.

In this embodiment, as shown in FIGS. 11 and 12, the flange 176 of the fixing member 170 is substantially circular, but has a D-cut shape with only a part cut in the chord direction. Corresponding to the D cut portion 176d of the flange 176, a chord direction portion 182d is also provided on the inner peripheral surface of the head insertion hole 182 of the toilet seat support member 172, and these D cut portion 176d and chord direction portion 182d are formed. By engaging, orientation and rotation prevention of the toilet seat support member 172 are performed.

In this embodiment, as shown in FIG. 10, in order to improve the directionality of the packing 210, two flat portions 174h are provided at the root of the bolt 174, and the packing 21
The inner hole of 0 is also provided with two chordal portions 210a.
A chordal direction portion 210b is also provided on the outer peripheral surface of the packing 210.

18 to 20, the recess 190 for retracting the ball 188 in the embodiment of FIGS. 10 to 17 is removed from the toilet seat support member 172, and a notch 212 for ball escape is provided in the head 178 instead. It shows a toilet seat mounting device.

The rest of the construction of the toilet seat mounting device shown in FIGS. 18 to 20 is the same as that shown in FIGS.
The same reference numerals as those in the drawings indicate the same parts.

Also in the toilet seat mounting device of FIGS. 18 to 20, the toilet seat support member 172 can be locked and unlocked by turning the rotary plate 194 with the knob 202. When the toilet seat support member 172 is pulled upward in the unlocked state, the balls 188 pass through the notches 212, so that the toilet seat support member 172 can be separated from the fixing member 170.

[0059]

As described above, in the toilet seat mounting apparatus of the present invention, when the toilet seat support member is attached to the fixing member and is in the locked state, a large external force is applied to the toilet seat support member in the detaching direction. Even if it does, the toilet seat support member is reliably prevented from coming off the fixing member. Further, when removing the toilet seat support member from the fixing member, it is sufficient to dispose the lock member in a position to be disengaged from the engaging portion in advance and to perform only an operation of lifting the toilet seat support member, which is easily removed from the fixing member. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of a toilet seat mounting device according to an embodiment.

FIG. 2 is a front view of the apparatus of FIG.

3 is a plan view of the device of FIG. 1. FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is an exploded perspective view of the toilet seat support device.

FIG. 7 is a perspective view showing a conventional example.

FIG. 8 is an exploded perspective view showing a conventional example.

FIG. 9 is a sectional view showing a conventional example.

FIG. 10 is a perspective view of a toilet seat mounting device according to another embodiment.

11 is an exploded view of the device of FIG.

12 is a sectional view taken along line XII-XII in FIG.

FIG. 13 is a cross-sectional view of FIG. 12 with the bolt removed.

14 is a sectional view taken along line XIV-XIV in FIG.

15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a rear perspective view of the rotating plate.

FIG. 17 is a sectional view taken along the line XVII-XVII in FIG. 16;

FIG. 18 is an exploded perspective view of a toilet seat mounting device according to yet another embodiment.

19 is a vertical cross-sectional view of the device of FIG.

20 is a cross-sectional view taken along the line XX-XX in FIG.

[Explanation of symbols]

 70,170 Fixing member 72,172 Toilet seat support member 78,178 Head 80,180 Groove 82,182 Head insertion hole 84,184 Ring 88,188 Ball 94,194 Rotating plate

Claims (9)

[Claims] 1. A fixing member fixed to a toilet bowl, a toilet seat support member removably engaged with the fixing member, and a lock mechanism for preventing the toilet seat support member from being separated from the fixing member. In the toilet seat mounting apparatus comprising, the fixing member includes a disk-shaped head arranged on the upper surface of the toilet bowl, the side circumferential surface of the head is provided with a groove in the circumferential direction, the toilet seat support member, A head insertion hole into which the head is inserted is provided, and a ring is arranged concentrically with the head in the head insertion hole, and the ring is provided with a hole or a notch that radially penetrates the ring. A lock member is disposed in the hole or notch so as to be movable in the radial direction, and an end portion of the lock member outside the ring is inserted into a part of an inner peripheral surface of the head insertion hole. A lock is provided to obtain the lock When the outer end of the ring enters the recess, the inner end of the ring retreats from the groove of the head, and the outer end of the ring enters the head insertion hole other than the recess. A toilet seat mounting device characterized in that, when abutting on the peripheral surface, the inner end of the ring is sized to fit into the groove of the head. 2. A fixing member fixed to a toilet bowl, a toilet seat support member removably engaged with the fixing member, and a lock mechanism for preventing the toilet seat support member from being separated from the fixing member. In the toilet seat mounting apparatus comprising, the fixing member includes a disk-shaped head arranged on the upper surface of the toilet bowl, the side circumferential surface of the head is provided with a groove in the circumferential direction, the toilet seat support member, A head insertion hole into which the head is inserted is provided, and a ring is arranged concentrically with the head in the head insertion hole, and the ring is provided with a hole or a notch that radially penetrates the ring. The locking member is arranged in the hole or notch so that the inner end of the ring is inserted into the groove of the side peripheral surface of the head, and a part of the outer peripheral edge of the head is provided. , The inner end of the ring of the lock member passes A toilet seat mounting device, which is provided with a notch that can be formed. 3. The toilet seat mounting device according to claim 1, wherein the lock member is a spherical ball. 4. The toilet seat according to claim 1 or 2, wherein the hole or notch in the ring is narrowed on the inner peripheral side of the ring so as to prevent the lock member from falling inside the ring. Mounting device. 5. The rotating plate connected to the ring is disposed on the upper surface of the toilet seat support member according to claim 1, and the ring and the head insertion hole are formed by the rotating plate. Toilet seat mounting device characterized by being covered. 6. The toilet seat mounting device according to claim 1, wherein a rotary plate is provided integrally with the ring, and the head inserting hole is covered by the rotary plate. . 7. The toilet seat mounting device according to claim 5, wherein the rotary plate is provided with a knob for operating the ring rotation. 8. The elastic piece according to claim 6, wherein a plurality of slits are formed in the ring in a cut shape in a direction parallel to the axial center line of the ring, whereby an elastic piece capable of elastically deforming in the radial direction of the ring is provided. The toilet seat mounting device, wherein the elastic piece and the claws provided on the inner peripheral surface of the head insertion hole are engaged with each other so that the ring is rotatably held by the toilet seat support member. 9. The elastic piece according to claim 8, wherein a plurality of the elastic pieces are provided, one of which is smaller in height than other elastic pieces, and which faces the tip end surface of the elastic piece having the small height. The toilet seat mounting device is characterized in that a convex portion is provided on the toilet seat support member.