JPH05176866A - Toilet lid opening/closing apparatus - Google Patents

Abstract

PURPOSE:To provide a toilet lid opening/closing apparatus which has greater freedom of designing a toilet as a whole by making the opening or closing of the toilet lid made hygienic to eliminate discomfort for a user. CONSTITUTION:A pulley 5 to be driven is fastened on an arm shaft 3 for opening or closing a toilet lid 1 and a drive pulley 10 is arranged to be separated from the pulley 5 to be driven. The pulley 5 to be driven and the drive pulley 10 are connected with a tie member 11 through a relay pulley 7 and the drive pulley 10 is energized to turn in the direction of opening through a link plate 12 with a torsion spring. And, when the toilet lid 1 is in the closed state, an engaging protrusion 10b is retained with a retaining pawl 23c of a switch 23 of a retaining means 20 to make the drive pulley 10 unable to rotate against an energizing force of the torsion spring 13. When the toilet lid 1 is opened, the retaining of the engaging protrusion 10b with the retaining pawl 23c is released. Moreover, a directional air damper 30 is worked to link to the torsion spring 13 through the link plate 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet lid opening / closing device, and more particularly, to a device for mechanically opening / closing the toilet lid of a Western style sitting toilet.

[0002]

2. Description of the Related Art Conventionally, a toilet lid of a Western-style seating toilet and a toilet lid that covers the toilet seat have been opened and closed by a user holding a tip portion of the toilet lid up and down.

Therefore, when the toilet lid is opened, it is necessary to raise it with a constant force by putting a hand on the inner surface of the toilet lid. As a result, when the toilet lid is opened, the inner surface of the toilet lid is directly touched, which is unsanitary and may cause discomfort to the user. Also, when the toilet lid is closed, it is necessary to slowly move it down while supporting the toilet lid by hand to prevent damage to the toilet lid or the toilet seat due to a collision with a ceramic toilet seat and the generation of collision noise. is there. As a result, the closing operation of the toilet lid needs attention and is troublesome. Further, even when the toilet lid is closed, the user moves his or her hand on the inner surface of the toilet lid to support the toilet lid and move downward, which is unsanitary and gives the user discomfort. Furthermore, it is necessary to form a notch for inserting a hand between the toilet lid and the toilet seat, which limits the degree of freedom in designing the toilet lid, the toilet seat, and the entire toilet bowl.

Therefore, without directly touching the toilet lid,
A toilet lid opening / closing device that can open and close the toilet lid has been proposed,
For example, Japanese Utility Model Laid-Open No. 56-11699 and Japanese Utility Model Laid-Open No. 58-58.
The technique is disclosed in Japanese Patent Publication No.-68189.

In all of these techniques, a foot pedal and a toilet lid are mechanically connected by a wire or the like, and the toilet lid is opened and closed by stepping on the pedal.

[0006]

Since the conventional toilet lid opening / closing device is constructed as described above, there are various parts in the path from the pedal to the toilet lid, and the large size of the pedal or the like. Parts will be exposed to the side of the toilet bowl. As a result, the size of the entire apparatus is increased, the space around the toilet bowl is limited, and the degree of freedom in designing the entire toilet bowl is also limited. Also, since the opening / closing force of the pedal is directly transmitted to the toilet lid to open and close the toilet lid, the toilet lid is suddenly opened and closed, and the toilet lid is damaged due to the collision with the toilet seat, as in the case where the toilet lid is opened and closed by hand. Or, there is a possibility of causing inconvenience such as generation of a collision sound.

Therefore, the present invention makes the opening and closing of the toilet lid hygienic so that the user does not feel uncomfortable, and
An object of the present invention is to provide a toilet lid opening / closing device in which the degree of freedom in designing the entire toilet bowl is increased.

[0008]

A toilet lid opening / closing device according to the present invention has a driven pulley fixed to an arm shaft for opening and closing the toilet lid.
A drive pulley is spaced apart from the driven pulley, the driven pulley and the drive pulley are connected by a connecting member, an elastic member urges the drive pulley to rotate in a certain direction, and a locking means is provided to lock the elastic member. The drive pulley is non-rotatably locked and unlocked against the biasing force, and the opening of the toilet lid is buffered by a damper.

[0009]

According to the present invention, when the toilet bowl is used, the drive pulley is rotated in a fixed direction by the elastic member by releasing the lock of the drive pulley by the locking means, and the rotational force is driven by the connecting member. This is transmitted to the pulley, and the driven pulley and arm shaft rotate to open the toilet lid. At this time, the urging force of the elastic member is buffered by the damper, the rotational speed of the drive pulley is adjusted appropriately, and the toilet lid opens at an appropriate speed. When the toilet lid is closed after using the toilet bowl, the driven pulley is rotated via the arm shaft and the rotational force is transmitted to the drive pulley via the connecting member, causing the drive pulley to rotate in the opposite direction to the fixed direction. Thus, the elastic force is stored in the elastic member, and after the toilet lid is closed, it is locked by the locking means and is prevented from rotating in the predetermined direction. At this time, the damper cushions the closing force of the toilet lid, and the toilet lid is closed at an appropriate speed. After the closing of the toilet lid, when the toilet is not used, the locking means locks the drive pulley in a non-rotatable manner against the biasing force of the elastic member to keep the elastic member in the accumulating state. However, the urging force of the elastic member is prevented from being transmitted from the driving pulley to the toilet lid by the connecting member via the driven pulley and the arm shaft,
Keep the toilet lid in the closed position.

[0010]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is a side sectional view of a toilet lid opening / closing device of a first embodiment of the present invention, FIG. 2 is a partially cutaway plan view of a toilet lid opening / closing device of a first embodiment of the present invention, and FIG. FIG. 4 is a side sectional view of the locking means of the first embodiment, and FIG. 4 is a sectional view of the damper of the first embodiment of the present invention.

As shown in FIGS. 1 and 2, the toilet lid 1 is fixed to an arm shaft 3 via an arm 2, and the arm shaft 3 is rotatably attached to a toilet bowl (not shown). The toilet lid 1 opens and closes the toilet bowl and the toilet seat 4 via the arm shaft 3. A driven pulley 5 having a predetermined diameter is fixed to one end of the arm shaft 3 so as to be rotatable together with the arm shaft 3.

On the other hand, a housing 6 of the toilet lid opening / closing device of this embodiment is disposed at a position separated from the arm shaft 3 to which the driven pulley 5 is fixed by a predetermined distance. An opening 6a is formed in the front wall on one side of the housing 6,
A relay pulley 7 is rotatably attached to a position in the housing 6 facing the opening 6a. A support plate 8 is erected inside the housing 6, and a connecting shaft 9 is rotatably provided laterally between the support plate 8 and the side wall of the housing 6. A drive pulley 10 having a predetermined diameter is fixed to the connecting shaft 9 at a distance from the supporting plate 8 and is rotatable together with the connecting shaft 9. Further, one end of a connecting member 11 made of a wire, a belt or the like is fixed to a fixing portion 5a at a predetermined position in the circumferential direction of the driven pulley 5. And
The connecting member 11 is guided and wound around the relay pulley 7, and the other end thereof is guided by the drive pulley 10 to be fixed to a fixing portion 10a at a predetermined position in the circumferential direction of the drive pulley 10. As shown in FIG. 3, the driving pulley 10 is integrally formed with an engaging projection 10b having a tapered surface 10c on the distal end side and a vertical surface 10d on the proximal end side at an outer peripheral position where it does not interfere with the connecting member 11. is doing.

One end of a link plate 12 is fixed to a connecting shaft 9 on one side surface (side surface facing the support plate 8) of the driving pulley 10, and the connecting shaft 9 and the driving pulley 1 fixed to the connecting shaft 9.
It can be rotated together with zero. In addition, the support plate 8
A torsion spring 13 as an elastic member is interposed between the link plate 12 and the link plate 12 so as to fit the connecting shaft 9 on the outside, and one end of the torsion spring 13 is fixed to a substantially central part of the link plate 12 and the other end is fixed to the support plate 8. Has been done. The torsion spring 13 is driven by the drive pulley 10.
Is urged to rotate in the opening direction (the arrow direction in FIGS. 1 and 3).

On the other hand, as shown in FIG. 3, a locking means 20 is provided in the housing 6 near the drive pulley 10. That is, a stepped mounting cylinder portion 21 is integrally formed on the upper wall of the housing 6, and a rib 22 is fixed to the lower end of the mounting cylinder portion 21. The head portion 23a of the switch 23 is slidably inserted into the large diameter hole 21a of the mounting cylinder portion 21, and the small diameter hole 21c of the mounting cylinder portion 21 and the through hole 22a of the rib 22 have a substantially L-shaped cross section. The vertical portion of the leg portion 23b of the switch 23 is inserted slidably. A coil spring 24 is interposed between the lower surface of the head portion 23a of the switch 23 and the bottom surface of the medium diameter hole 21b of the mounting cylinder portion 21, and the leg portion of the switch 23 is always urged by the urging force of the coil spring 24. The bent portion of 23b is brought into contact with and locked by the rib 22, and the head portion 23a is held in a state of being separated from the bottom surface of the large diameter hole 21a. Further, the leg portion 2 of the switch 23
A locking claw 23c having a tapered surface 23d on the distal end side and a vertical surface 23e on the proximal end side is formed at the distal end of 3b so as to project upward. The surface 10d can be locked.

When the toilet lid 1 is in the closed position shown by the solid line in FIG. 1, the locking claw 23c of the switch 23 is provided.
Vertical surface 23e locks the vertical surface 10d of the engaging projection 10b of the drive pulley 10, and the drive pulley 10 is held in the closed position shown by the solid line in FIG. 3 against the biasing force of the torsion spring 13. At the same time, the torsion spring 13 is maintained in a stored state. Further, when the toilet lid 1 is opened, the head 23a of the switch 23 is pushed down against the urging force of the coil spring 24, so that the engaging protrusion 10 of the drive pulley 10 by the locking claw 23c.
The lock of b is released, the torsion spring 13 is released, and the drive pulley 10 is rotated in the opening direction via the link plate 12,
The rotational force is transmitted from the relay pulley 7 to the driven pulley 5 on the arm shaft 3 via the connecting member 11.

Although not shown, a driven pulley 5 is fixed to the other end of the arm shaft 3, and a relay pulley 7, a support plate 8, a connecting shaft 9 are provided on the other side of the housing 6.
The drive pulley 10, the link plate 12, the torsion spring 13, and the locking means 20 are provided, and the driven pulley 5 and the drive pulley 10 are connected by the connecting member 11. However, since these configurations are the same as those described above. , The description is omitted.

One end of a link rod 14 is rotatably attached to the other end of the link plate 12 provided on one side of the housing 6, and a link plate provided on the other side of the housing 6 not shown. At the other end of 12, link bar 14
The other end is attached so as to be relatively rotatable, and both link plates 12 are connected by a link rod 14. The link rod 14
A tip of a shaft 31 of an air damper 30 for cushioning the biasing force of the torsion spring 13 and rotating the drive pulley 10 at an appropriate speed is attached at a substantially central position of the shaft. The air damper 30 has a support portion 30 at a base end thereof.
A is rotatably attached to the housing 6.

As shown in FIG. 4, the air damper 30 has a piston 32 formed at the base end of the shaft 31 and an opening 3
0b, and the pair of flanges 32a and 32b of the piston 32 are slidably housed in the housing cylinder 33.
A taper surface 32 whose diameter decreases toward the opening 30b
c is formed. An O-ring 34 is mounted between the flanges 32a and 32b. The air damper 30 and the piston 32 and the shaft 31 of the air damper 30 are located in the closed position shown by the solid line in FIGS. 1 and 4 when the toilet lid 1 is in the closed position, and are in the open position when the toilet lid 1 is in the open position. 1 and the open position shown by the chain double-dashed line in FIG. In addition,
The O-ring 34 relatively moves on the tapered surface 32c of the piston 32 when the piston 32 starts to move, and on the large diameter side of the tapered surface 32c, the O-ring 34 is pressed and held between the O-ring 34 and the inner peripheral surface of the housing cylinder 33. On the small diameter side of 32c, the housing cylinder 3
It will be in a loosely fitted state without being held between 3 and.

As a result, in the air damper 30, when the piston 32 moves from the closed position to the open position, the O-ring 34 is sandwiched and slid between the tapered surface 32c and the inner peripheral surface of the accommodating cylinder 33 to generate friction resistance. It exerts a large buffering force by adding a normal buffering force due to the circulation of air through the orifice 30c and a frictional resistance force by the O-ring 34. Also,
In the air damper 30, when the piston 32 moves from the open position to the closed position, the O-ring 34 is loosely fitted between the taper surface 32c and the inner peripheral surface of the accommodating cylinder 33, and friction resistance does not occur. It exerts only the normal buffering power by the circulation of. That is, the air damper 3 of this embodiment
0 is used as the air damper 30 having a directivity that makes the cushioning force different depending on the moving direction of the piston 32.

In order to reduce the size of the torsion spring 13 and the air damper 30 that occupy a large volume in the housing 6 to reduce the size of the toilet lid opening / closing device, the diameter of the drive pulley 10 is larger than that of the driven pulley 5. It is said that. That is, by making the diameter of the drive pulley 10 larger than the diameter of the driven pulley 5, the torsion spring 1 required for the rotation of the drive pulley 10 is increased.
The biasing force of 3 also becomes proportionally smaller, and in accordance with this, the air damper 3 required to buffer the biasing force of the torsion spring 13
Since the buffering force of 0 also decreases proportionally, the torsion spring 13
Also, the air damper 30 need only be small. Further, the opening angle of the toilet lid 1 is usually 90 degrees or more, and the toilet lid 1 is supported by its own weight in contact with a stopper (not shown) provided at the rear of the toilet bowl to maintain the open position. Is becoming

Next, the operation of the toilet lid opening / closing device of the present embodiment constructed as described above will be described.

When the toilet is not used, the toilet lid 1 is in the closed position and the drive pulley 10, as shown by the solid lines in FIGS. 1 and 3.
The link plate 12 and the air damper 30 are also in the closed position. At this time, the drive shaft 10 includes a connecting shaft 9 and a link plate 12.
Although the urging force of the torsion spring 13 is transmitted via the lever, the engaging protrusion 10b of the drive pulley 10 is not connected to the locking claw 23 of the switch 23.
Since it is locked to c, the drive pulley 10 has a torsion spring 1
Rotation in the opening direction is blocked against the urging force of 3, and the torsion spring 13 maintains the force accumulation state. As shown by the solid line in FIG. 4, the piston 32 of the air damper 30 is in the closed position inside the housing cylinder 33.

When the toilet bowl is used, the head portion 23a of the switch 23 constituting the locking means 20 is pushed down against the biasing force of the coil spring 24. Then, the leg 2 of the switch 23
3b slides down the small diameter hole 21c of the mounting cylinder part 21 and the through hole 22a of the rib 22 to move downward, the bent part of the leg part 23b separates from the rib 22, and the locking claw 23c at the tip of the leg part 23b moves. Engagement protrusion 1 of drive pulley 10 by vertical surface 23e
The vertical surface 9d of 0b is unlocked. As a result, the drive pulley 10 can be rotated in the opening direction, and the torsion spring 13, which has been prevented from transmitting the biasing force via the drive pulley 10, the connecting shaft 9 and the link plate 12, is released, and the linking plate is caused by the biasing force. The drive pulley 10 rotates in the opening direction via 12 and the connecting shaft 9. As the drive pulley 10 rotates, its rotational force is transmitted from the relay pulley 7 to the driven pulley 5 via the connecting member 11, and the driven pulley 5 rotates in the opening direction. Then, the arm shaft 3 to which the driven pulley 5 is fixed rotates, and as the arm shaft 3 rotates, the toilet lid 1 moves upward in the opening direction via the arm 2 and opens to hit a stopper (not shown) behind the toilet bowl. It is contacted and supported, stopped open, and held in the open position.

At this time, the link plate 12 and the link rod 14
The air damper 30 connected to the drive pulley 10 via
Exerts a buffering effect. That is, with the rotation of the drive pulley 10 in the opening direction, the shaft 31 and the piston 32 of the air damper 30 are indicated by a two-dot chain line from the closed position shown by the solid line in FIGS. 1 and 4 via the link plate 12 and the link rod 14. Start moving to the open position shown. Then, the O-ring 34 relatively moves to the large diameter side of the tapered surface 32c of the piston 32, and is clamped between the large diameter side of the tapered surface 32c and the inner peripheral surface of the housing cylinder 33. Then, as the piston 32 slides, the O-ring 34 is pressed against the large diameter side of the tapered surface 32c and frictionally slides on the inner peripheral surface of the housing cylindrical body 33. Therefore, the air damper 30 buffers the rotation of the drive pulley 10 in the opening direction by the biasing force of the torsion spring 13 with a large buffering force including the normal buffering force of the orifice 30c and the frictional resistance force of the O-ring 34, The rotational speed of the drive pulley 10 is appropriately adjusted, and the opening operation of the toilet lid 1 is performed gently. As a result, the toilet lid 1 is opened hygienically without directly touching the toilet lid 1, and the user does not feel uncomfortable.
Moreover, there is no inconvenience that the toilet lid 1 is suddenly opened and collides with a stopper or the like with a large impact force, and the toilet lid 1 is damaged or a collision noise is generated.

When the toilet lid 1 is completely opened,
The toilet lid 1 is arranged at the position shown by the chain double-dashed line in FIG. 1, the drive pulley 10 is arranged at the position where its engaging projection 10b is shown by the chain double-dashed line in FIG.
4, piston 3 of air damper 30 and air damper 30
2 is arranged at the open position indicated by the chain double-dashed line in FIGS. 1 and 4. Further, the switch 23 of the locking means 20 is moved upward by the biasing force of the coil spring 24 to return to the position shown in FIG. 3, and is located on the outer peripheral surface of the engaging projection 10b of the drive pulley 10 at the rear side in the rotation direction. ..

When the toilet lid 1 is to be closed again after using the toilet bowl, while holding the outer side surface of the toilet lid 1 in the open position and standing upright, pull the toilet lid 1 toward you and apply a slight pressing force. Move downwards and close. Along with this, the arm shaft 3 and the driven pulley 5 rotate in the closing direction (the direction opposite to the arrow direction in FIG. 1) via the arm 2, and the rotational force of the driven pulley 5 causes the connecting member 1 to rotate.
1 is transmitted from the relay pulley 7 to the drive pulley 10, and the drive pulley 10 rotates in the closing direction. With the rotation of the drive pulley 10, the link plate 12 rotates from the closed position shown by the chain double-dashed line in FIG. 3 to the open position shown by the solid line through the connecting shaft 9, and at the same time, the torsion spring connected to the link plate 12 is rotated. 13 is stored. At this time, the air damper 3 is inserted through the link rod 14.
0 moves from the closed position shown by the two-dot chain line in FIG. 1 to the open position shown by the solid line, and the piston 32 slides from the closed position shown by the two-dot chain line in FIG. 4 to the open position shown by the solid line. Then, the O
The ring 34 relatively moves from the large diameter side of the tapered surface 32c of the piston 32 to the small diameter side, and becomes loosely fitted between the small diameter side of the tapered surface 32c and the inner peripheral surface of the housing cylinder 33, so that the piston 32 slides. Due to the movement, the O-ring 34 is not pressed by the tapered surface 32c and frictionally slides on the inner peripheral surface of the housing cylindrical body 33.

Therefore, the air damper 30 buffers the rotation of the drive pulley 10 in the closing direction due to the manual closing of the toilet lid 1 only by the normal buffering force of the orifice 30c. As a result, the closing operation of the toilet lid 1 is performed at an appropriate speed regardless of the magnitude of the manual force, but the cushioning force of the air damper 30 becomes excessive and does not hinder the closing of the toilet lid 1. .. Further, there is no inconvenience that the toilet lid 1 is suddenly closed and collides with the toilet seat 4 with a large impact force, and the toilet lid 1 or the toilet seat 4 is damaged or a collision sound is generated. Also in this case, since the toilet lid 1 is closed by touching the outer surface without touching the inner surface of the toilet lid 1, it is hygienic and does not give the user any discomfort.

On the other hand, with the rotation of the driving pulley 10 in the closing direction, the switch 23 of the locking means 20 causes the tapering surface 23d of the locking claw 23c to engage the engaging projection 1 of the driving pulley 10.
By making sliding contact with the taper surface 10c of 0b, the engaging projection 10 is gradually moved downward against the biasing force of the coil spring 24.
b, and the vertical surface 23 thereof as shown by the solid line in FIG.
The vertical surface 10d of the engaging protrusion 10b of the drive pulley 10 is caused by e.
Lock again. When the toilet lid 1 is closed, the toilet lid 1 is arranged at the position shown by the solid line in FIG. 1, and the link plate 12, the link rod 14, the air damper 30 and the piston 32 of the air damper 30 are arranged as shown in FIGS. It is placed in the closed position shown by the solid line. As a result, the toilet lid opening / closing device is placed at the standby position for the next opening of the toilet lid.

As described above, the toilet lid opening / closing device of the first embodiment is
A driven pulley 5 is fixed to an arm shaft 3 that opens and closes the toilet lid 1, a drive pulley 10 is spaced apart from the driven pulley 5, and the driven pulley 5 and the drive pulley 10 are interconnected via a relay pulley 7. 11, and the link plate 12 by the torsion spring 13.
The drive pulley 10 is urged to rotate in the opening direction via the lever, and when the toilet lid 1 is closed, the engaging projection 10b of the drive pulley 10 is locked by the locking claw 23c of the switch 23 of the locking means 20. The drive pulley 10 is made non-rotatable against the biasing force of the torsion spring 13 and the locking means 2 is opened when the toilet lid 1 is opened.
The engagement protrusion 10b of the drive pulley 10 is unlocked by the lock claw 23c of the switch 23 of 0, and the air damper 30 having a directivity that exerts a large buffering force in the opening direction of the drive pulley 10 is linked. The torsion spring 1 through the plate 12
3 is operatively connected.

Therefore, in the first embodiment, when the toilet bowl is used, the torsion spring 13 is released by pushing down the switch 23 of the locking means 20 to unlock the drive pulley 10.
Causes the drive pulley 10 to rotate in the opening direction, and its rotational force is transmitted from the relay pulley 7 to the driven pulley 5 via the connecting member 11, and the driven pulley 5 and the arm shaft 3 rotate to open the toilet lid 1. .. As a result, it is not necessary to directly touch the toilet lid 1 to open the toilet lid 1, which is hygienic and does not give a discomfort to the user. Further, since the toilet lid 1 can be automatically opened only by pushing down the switch 23, the operation is easy. At this time, the air damper 30 buffers the biasing force of the torsion spring 13 with a large buffering force, adjusts the rotation speed of the drive pulley 10 appropriately, and opens the toilet lid 1 at an appropriate speed. As a result, it is possible to prevent the toilet lid 1 from being suddenly opened and colliding with the stopper with a large impact force to be damaged or to generate a collision noise.

When the toilet lid 1 is closed with a hand on the outer surface of the toilet lid 1 after use of the toilet, the driven pulley 5 is rotated in the closing direction via the arm shaft 3 and its rotational force is linked. It is transmitted from the relay pulley 7 to the drive pulley 10 via 11 and the drive pulley 10 rotates in the closing direction to store the torsion spring 13 via the link plate 12 and after closing the toilet lid 1. , Is locked by the locking means 20 and is prevented from rotating in the opening direction. As a result, it is not necessary to touch the inner surface of the toilet lid 1 for closing the toilet lid 1, which is hygienic and does not give the user any discomfort. At this time, the air damper 30 buffers the manual closing force of the toilet lid 1 with a normal buffering force, and the toilet lid 1 is closed at an appropriate speed regardless of a slight difference in the manual force. As a result, the toilet lid 1 is rapidly closed and the toilet seat 4
It is possible to prevent the vehicle from colliding with a large impact force and being damaged, or making a collision noise.

After the toilet lid 1 is closed, when the toilet is not used, the locking means 20 resists the biasing force of the torsion spring 13 to lock the drive pulley 10 in a non-rotatable manner and twists it. The spring 13 is held in a stored state, and the biasing force of the torsion spring 13 is prevented from being transmitted from the drive pulley 10 to the toilet lid 1 via the connecting member 11, the driven pulley 5 and the arm shaft 3, Maintain the lid 1 in the closed position. As a result, the toilet lid 1 does not open unexpectedly and is placed at the standby position for the next opening operation, so that the next opening operation of the toilet lid 1 can be reliably performed. In other words, it is possible to automatically prepare for the next opening operation with the closing operation of the toilet lid 1.

Since the drive pulley 10 has a larger diameter than the driven pulley 5, the diameter of the drive pulley 10 is made larger than the diameter of the driven pulley 5 so that the biasing force of the torsion spring 13 required for the rotation of the drive pulley 10 is increased. Can be proportionally reduced, and accordingly, the buffer force of the air damper 30 required to buffer the biasing force of the torsion spring 13 can also be proportionally reduced, so that the torsion spring 13 and the air damper 30 can be downsized. As a result, the entire toilet lid opening / closing device can be downsized, the influence on the design of the entire toilet bowl can be reduced, and the degree of freedom in design can be increased.

Further, since various components such as the drive pulley 10 and the torsion spring 13 are housed in the housing 6 and are not exposed to the outside, it is possible to maintain a good appearance without impairing the overall appearance of the toilet bowl. it can.

By the way, the elastic member of the first embodiment is composed of the torsion spring 13, but the present invention is not limited to this, and the drive pulley 1 is not limited to this.
Any member that functions as a biasing member that biases 0 in the opening direction may be used. For example, the drum is fixed to the outer periphery of the connecting shaft 9, and the spiral spring disposed in the drum is directly operatively connected to the connecting shaft 9, and the driving pulley 10 is opened in the opening direction via the connecting shaft 9 by the urging force of the spiral spring. It is also possible to urge rotation. In addition, one end of the tension coil spring is fixed to the housing 6 and the other end is fixed to the link plate 12,
It is also possible to rotationally bias the drive pulley 10 in the opening direction by pulling and biasing 2 in the opening direction.

The locking means 20 of the first embodiment is
The engaging projections 10b formed on the outer periphery of the drive pulley 10 are configured to be locked by the locking claws 23c of the switch 23. However, the present invention is not limited to this and is not limited thereto. When the toilet lid 1 is closed, the drive pulley 10 is prevented from rotating in the opening direction against the biasing force of the elastic member, and when the toilet lid 1 is opened, the drive pulley 10 is unlocked and the drive pulley 10 is opened. Anything can be used as long as it can rotate. For example, a disc-shaped member is fixed to the connecting shaft 9 separately from the drive pulley 10, and an engaging protrusion is formed on the outer periphery thereof, and the engaging protrusion is locked by the locking claw 23c of the switch 23. It is also possible to do so. Further, the linking plate 12 can be directly locked and unlocked by the locking means 20, so that the drive pulley 10 can be prevented from rotating and rotatable. However, when the engaging protrusion 10b is formed on the outer periphery of the drive pulley 10 and is configured to be locked by the locking claw 23c of the switch 23, the number of parts as a whole is small and the structure is simple, and The space in the housing 6 is also small, and the effect that the toilet lid opening / closing device can be made smaller can be obtained.

In the first embodiment, the drive pulley 10 is used.
Although the relay pulley 7 is arranged between the driven pulley 5 and the driven pulley 5, the relay pulley 7 can be omitted and the driven pulley 5 can be directly rotated by the drive pulley 10. In this case, the arrangement of the drive pulley 10, the link plate 12, etc. is changed as appropriate.

FIG. 5 is a side view of the drive pulley of the toilet lid opening / closing device of the second embodiment of the present invention.

The second embodiment is different from the first embodiment only in the structure of the driving pulley, and the other structures are the same as those in the first embodiment. Therefore, only the driving pulley will be described. In the figure, the same reference numerals and symbols as those in the first embodiment indicate the same or corresponding portions as those of the first embodiment.

In the figure, the drive pulley 50 has a small diameter portion 51.
It is composed of an eccentric pulley formed of a large-diameter portion 52 and a plate cam shape, and is fixed to the connecting shaft 9. Also,
A fastening portion 51a is provided substantially at the center of the outer peripheral surface of the small diameter portion 51 of the drive pulley 50, and one end of the connecting member 11 is fastened to the fastening portion 51a. Then, the large diameter portion 52 of the drive pulley 50.
Has a top portion 52a located on the opposite side in the radial direction of the fastening portion 51a of the small diameter portion 51, and the locus of the top portion 52a is the outer peripheral surface of the drive pulley 10 of the first embodiment shown by the two-dot chain line in the figure. Almost matches. The boundary between the small-diameter portion 51 and the large-diameter portion 52 is an abutting portion 53 where the connecting member 11 starts to abut when the toilet lid 1 is closed, and the drive pulley 50 has a top portion 52 of the large-diameter portion 52.
It is an arcuate outer peripheral surface 54 whose radius gradually decreases from a to the contact portion 53.

An engaging projection (not shown) similar to the engaging projection 10b is formed at a predetermined position on the outer peripheral surface of the drive pulley 50 where it does not interfere with the connecting member 11, and the locking means 20 is provided. The locking claw 23c of the switch 23 enables locking and unlocking.

In the toilet lid opening / closing device of the second embodiment constructed as described above, when the toilet is used, the switch 23 of the locking means 20 is pushed down to release the locking of the drive pulley 50, thereby twisting. The drive pulley 50 is rotated in the opening direction (arrow direction in the figure) by the spring 13. Then, the driving pulley 50 winds up the connecting member 11 at the arcuate outer peripheral surface 54, and the rotational force buffered by the air damper 30 is transmitted from the relay pulley 7 to the driven pulley 5 via the connecting member 11. The pulley 5 and the arm shaft 3 rotate to open the toilet lid 1. As a result, it is not necessary to directly touch the toilet lid 1 to open the toilet lid 1, it is hygienic and does not cause discomfort to the user, and the toilet lid 1 is suddenly opened to serve as a stopper. It is possible to prevent the vehicle from colliding with a large impact force and being damaged, or making a collision noise.

When the toilet lid 1 is closed by using the outer surface of the toilet lid 1 after use of the toilet bowl, the driven pulley 5 is rotated through the arm shaft 3 and the rotational force thereof is transmitted through the connecting member 11. Is transmitted from the relay pulley 7 to the drive pulley 50. Then, the connecting member 11 biases the arc-shaped outer peripheral surface 54 of the drive pulley 50 through the relay pulley 7 in a direction toward the relay pulley 7.
The drive pulley 50 is rotated in the closing direction (direction opposite to the arrow direction in the figure). At this time, the arcuate outer peripheral surface 5 of the drive pulley 50 is
Since the radius of 4 is gradually reduced from the large diameter portion 52 side to the small diameter portion 51 side, the connecting member 11 at the start of closing the toilet lid 1
The radius of the contacting portion of the driven pulley 5 is the largest as compared with the driven pulley 5, and the radius becomes smaller than the radius of the driven pulley 5 as the driving pulley 50 rotates in the closing direction. That is,
When the closure of the toilet lid 1 is started, the closure of the toilet lid 1 can be started with a minimum force. Then, as the toilet lid 1 moves downward, the force required for closing increases, but the toilet lid 1 automatically moves downward due to its own weight to try to close the toilet lid 1. The force required from the start of closing to the end of closing is generally uniform. As a result, the load required to close the toilet lid 1 can be made substantially uniform, and the toilet lid 1 can be closed smoothly. In addition, as the drive pulley 50 rotates in the closing direction, the torsion spring 13 accumulates force through the link plate 12, and the toilet lid 1
After completion of the closing, the device is locked by the locking means 20 and is prevented from rotating in the opening direction, and the toilet lid opening / closing device is in a standby state for the next opening operation.

[0045]

As described above, in the toilet lid opening / closing device of the present invention, the driven pulley is fixed to the arm shaft for opening and closing the toilet lid, and the drive pulley is spaced apart from the driven pulley, and The driving pulley is connected to the driving pulley by a connecting member, the elastic pulley urges the driving pulley to rotate in a certain direction, and the locking means locks and locks the driving pulley non-rotatably against the urging force of the elastic member. Since the stopper is unlocked and the damper is operatively connected to the elastic member, when the toilet bowl is used, the driving pulley is rotated in a fixed direction by releasing the locking of the driving pulley by the locking means. , Its rotational force is transmitted to the driven pulley via the connecting member, and the driven pulley and the arm shaft rotate to open the toilet lid, so there is no need to directly touch the toilet lid to open the toilet lid. , Which is hygienic and may cause user discomfort. No. At this time, the urging force of the elastic member is buffered by the damper, the rotational speed of the drive pulley is adjusted appropriately, and the toilet lid opens at an appropriate speed. It is possible to prevent the vehicle from colliding due to force and being damaged, or making a collision noise.

When the toilet lid is closed after the toilet is used, the driven pulley is rotated via the arm shaft and the rotational force is transmitted to the driving pulley via the connecting member, so that the driving pulley is opposite to the fixed direction. It rotates in the direction to store the force of the torsion spring, and after the closing of the toilet lid is stopped by the locking means to prevent the rotation in the fixed direction. At this time, since the damper cushions the closing force of the toilet lid and the toilet lid is closed at an appropriate speed, the toilet lid suddenly opens and collides with the toilet seat with a large impact force and is damaged. It is prevented that a collision sound is generated.

After the closure of the toilet lid, when the toilet is not used, the locking means locks the drive pulley non-rotatably against the urging force of the elastic member to store the elastic member. In this state, the biasing force of the elastic member is prevented from being transmitted from the drive pulley to the toilet lid by the connecting member via the driven pulley and the arm shaft, and the toilet lid is maintained in the closed position. Is not opened unexpectedly and is placed at the standby position for the next opening operation, so that the next opening operation of the toilet lid can be reliably performed.

[Brief description of drawings]

FIG. 1 is a side sectional view of a toilet lid opening / closing device according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of the toilet lid opening / closing device of the first embodiment of the present invention.

FIG. 3 is a side sectional view of the locking means of the first embodiment of the present invention.

FIG. 4 is a sectional view of a damper according to a first embodiment of the present invention.

FIG. 5 is a side view of a drive pulley of a toilet lid opening / closing device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Toilet lid 3 Arm shaft 5 Driven pulley 10 Drive pulley 11 Connecting member 13 Torsion spring (elastic member) 20 Locking means 30 Air damper (damper)

Claims (1)

[Claims] 1. A driven pulley fixed to an arm shaft for opening and closing a toilet lid, a drive pulley spaced apart from the driven pulley, a connecting member connecting the driven pulley and the drive pulley, and the drive pulley. An elastic member for rotationally urging the drive pulley in a fixed direction, a locking means for locking and unlocking the drive pulley in a non-rotatable manner against the urging force of the elastic member, and a side for opening the toilet lid. And a damper for buffering the movement of the toilet lid opening and closing device.