JPH10272077A - Automatically opening and closing device for seat and seat cover toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the operating noise of a reduction gear, by installing an elasticity application means for reducing the rigidity of a ring-shaped part, to the plate ring- shaped part between a shaft part and a teeth part of each gear of a gear train, for decelerating the rotation of a driving motor for driving a member to be rotated to be opened and closed. SOLUTION: An opening and closing unit for controlling the opening and closing of a seat cover 12 and a seat 13, comprises a driving motor 21, and the rotation of the driving motor 21 is transmitted to an axis of rotation 14 through a small gear 212, and a reduction gear mechanism comprising the first through third gears 22-24 of the spur gears. On this occasion, the gears 22-24 of the reduction gear mechanism, and an output gear 25 supported by an axis of rotation 14, are respectively provided with the elasticity application means 1. That is, a circular recessed part is formed on a ring-shaped part 6 between a shaft part of a gear body 4 and a teeth part 4a, so that the elasticity can be applied. Whereby the operating noise can be reduced by the elasticity application means 1, when the automatic control for opening and closing only the seat cover 12, and opening and closing both of the seat cover 12 and the seat 13, is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening / closing apparatus suitable for opening and closing a toilet seat and a toilet lid in a Western-style toilet, and in particular, to reducing the operating noise from a gear train for reducing the rotation of a driving motor for opening and closing. It is.

[0002]

2. Description of the Related Art There have been proposed Western-style toilets without manual opening and closing operations of toilet seats and lids. The toilet seat / lid (hereinafter, referred to as a rotatable member) adopts a configuration in which one end in a substantially elliptical longitudinal direction is rotatable with a support end, and a load (rotation at the support end) is performed during the opening operation. Required torque of shaft when moving)
And the load is small during the closing operation.
Conventionally, paying attention to this characteristic, an automatic opening / closing device for opening and closing a toilet seat of this kind has been disclosed in, for example, Japanese Utility Model Laid-Open No. 61-147097. When the toilet seat is closed, it is driven at a low voltage equal to or lower than the rated voltage.

When the toilet seat and lid during opening and closing are stopped by an obstacle such as a person, an overload is applied to the motor, and the overload state continues. The winding will burn out. In view of this, the above-mentioned publications and Japanese Utility Model Laid-Open Publication No. 55-148500 disclose a configuration in which a drive motor is connected to a rotating shaft supporting a toilet seat and a toilet lid via a reduction gear and a clutch.

[0004]

However, if a reduction gear is used in the toilet seat and toilet lid automatic opening / closing device, it is inevitable that the gears make noise. The operation noise of the gear is generated when teeth having gaps between the tooth flank surfaces due to backlash or variations in the positions of the tooth traces mesh with each other. The operation sound of such gears is particularly loud in a narrow space of the toilet.

[0005] Therefore, it is desired to reduce the operating noise of the gear during the automatic opening / closing of the toilet seat and toilet lid. Although the operating noise of the gears can be reduced to some extent by shaving, applying special processing to each gear has the disadvantage of increasing costs. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the operating noise of a reduction gear in an automatic toilet seat and toilet lid opening and closing device using a reduction gear.

[0006]

According to the present invention, there is provided a drive motor for opening and closing at least one of a toilet lid and a toilet seat, and a rotation support for the rotary member. An automatic opening / closing device for a toilet seat and a toilet lid, comprising: a gear train disposed between a shaft and an output shaft of the drive motor, the gear train including a plurality of gears for reducing and transmitting rotation from the drive motor. Each of the above gears is characterized in that a plate-like ring-shaped portion between the shaft portion and the tooth portion is provided with elasticity imparting means for reducing the rigidity of the ring-shaped portion.

[0007]

In the toilet seat and toilet lid automatic opening / closing device according to the present invention, the ring-shaped portion of each gear constituting the gear train has elasticity by the elasticity imparting means. In addition, it is possible to reduce the gap between the tooth flank surfaces due to the backlash of the gears and the variation in the positions of the tooth traces, thereby minimizing the generation of operation noise.

[0008] The elasticity imparting means of the automatic toilet seat and toilet lid opening / closing apparatus according to the present invention may be constituted by holes or recesses or spiral or radial slits formed in the ring-shaped portion in the circumferential direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a main body unit 11 fixed to the rear of a toilet (not shown), a toilet lid 12,
The toilet seat 13 is shown. The toilet lid 12 and the toilet seat 13 are opened and closed by a rotating shaft 14 projecting from the main body unit 11 in a predetermined selection combination (selection of opening and closing both the toilet lid 12 and the toilet seat 13 and selection of opening and closing only the toilet lid 12). Supported as possible.

The body unit 11 includes a toilet lid 12 and a toilet seat 1.
An opening / closing unit 15 for controlling the opening / closing of the motor 3 is built in. The opening and closing unit 15 includes a drive motor 21 and a small gear 2 attached to an output shaft 211 of the drive motor 21.
12 and an output gear 25 coaxially supported on the rotating shaft 14
And a reduction gear mechanism composed of first, second, and third gears 22, 23, and 24 by spur gears in which the output gear 25 and the small gear 212 attached to the output shaft 211 are connected as main components. Built-in. That is, the first gear 2
2 meshes with a small gear 212 attached to the output shaft 211, the second gear 23 meshes with a small gear 221 formed on the shaft of the first gear 22, and the third gear 24 meshes with the shaft of the second gear 23. The output gear 25 meshes with the small gear 241 formed on the shaft of the third gear 24.

In the toilet seat and toilet lid automatic opening / closing device according to the present invention, the gears 22 to 24 of the reduction gear mechanism and the output gear 25 supported on the rotary shaft 14 are respectively shown in FIGS. The elasticity providing means 1 is provided. 3 and 4 show a gear 2 representing one of the gears 22 to 25. The gear 2 has a relatively long shaft portion 3 and a disc-shaped gear body 4 provided at one end of the shaft portion 3. The gear body 4 has teeth 4a on the outer peripheral edge. Further, a small gear 5 projecting in a hub shape from the shaft portion of the gear body 4 and meshing with an adjacent gear is integrally formed. Further, in the gear body 4, the shaft portion and the tooth portion 4
A concave portion is formed in a ring shape constituting the elasticity imparting means 1 in the ring-shaped portion 6 between the ring-shaped portion 6 and the ring-shaped portion 6. The gear 2 is manufactured by molding a resin, for example.

By the way, the rotating shaft 14 is connected to the opening / closing unit 1.
5 is protruded from both sides of the housing 15a, and is pivotally supported by the housing so as to be capable of sliding and rotating in the thrust direction AB (see FIG. 1). A spring 28 is anchored between the protruding end and a boss 27 fixed to the housing 15a. The spring 28 is a torsion spring, one end of which is hung on the boss 27 and the other end of which is hung by being inserted into the rotating shaft 14. With this configuration, the urging force is applied to the toilet lid 12 and the toilet seat 13 in the opening direction, so that the torque in the opening operation direction is reduced. The spring 28 also urges the rotating shaft 14 in the direction B separating from the toilet lid 12 and the toilet seat 13 by its elastic force as described below.

Next, means for switching the toilet lid 12 and the toilet seat 13 to a predetermined selection combination by the rotating shaft 14 and opening and closing the same is configured as shown in FIG. This means uses the other end of the rotating shaft 14 as a support shaft for the toilet lid 12 and the toilet seat 13 or
Switching between two support shafts. The other end of the rotating shaft 14 is provided with a projection 14
1, 141 are formed. Corresponding to the shape of the other end, perforations 121 and 131 having the same shape are formed on the side surface of the rear part of the toilet lid 12 and the toilet seat 13. The other end having the protrusions 141 and 141 is provided with the perforation 1 of the toilet lid 12 by selectively sliding the rotating shaft 14 in the thrust direction AB as described above.
It is possible to switch between a state in which the toilet cover 21 is fitted only and a state in which the toilet lid 12 and the toilet seat 13 are fitted into the perforations 131. Accordingly, when the toilet lid 12 and the toilet seat 13 are both opened, the other end of the rotary shaft 14 is fitted into the perforations 121 and 131, and when only the toilet lid 12 is opened and closed, the other end of the rotary shaft 14 is closed. It fits only in perforation 121.

The thrust motion of the rotating shaft 14 is caused by the coil 29 inserted into the opening / closing unit 15 with the rotating shaft 14 as a plunger (using a magnetic material at one end of the rotating shaft) and the spring 29 described above in this example. 28. That is, the other end of the rotating shaft 14 is
1 is loosely fitted, the coil 29 is excited, the rotating shaft 14 slides in the direction A against the force of the spring 28, and the other end of the rotating shaft 14 is loosely fitted only in the hole 121. , The coil 29 is de-energized, and the rotation shaft 1 is
4 is slid in the B direction.

Although not shown, when the toilet seat and toilet seat automatic opening and closing device are selectively opened and closed by a predetermined combination, the toilet seat and toilet seat opening / closing device is stopped at the maximum opening point or closed at the closing point. There is provided an electric control means for stopping the toilet seat or the toilet seat / toilet lid in the opposite direction when the toilet seat / toilet lid is stopped by an obstacle such as a person or maintaining the stop position. In the toilet seat / toilet lid automatic opening / closing device having such a configuration, the electric power to the drive motor 21 and the control means perform automatic control such as opening / closing only the toilet lid 12 and opening / closing the toilet lid 12 and the toilet seat 13 together. Do. At this time, the gears 22 to 25 constituting the gear train of the present invention rotate while meshing with each of the small gears 212 to 241, but the operating noise can be reduced because of the concave portion of the elasticity imparting means 1. The cause of the operation noise is a gap generated between the tooth flank surfaces due to backlash and variations in the positions of the tooth traces. However, as in the present invention, a concave portion is formed in the plate-like ring-shaped portion 6 between the shaft portion 3 and the tooth portion 4a. Are interspersed, the elasticity is imparted to the ring-shaped portion 6, and during the meshing operation, the pitch circle position of the tooth portion 4a is delicately displaced, and the backlash of the gears and the variation in the position of the tooth traces cause the gap between the tooth ending surfaces. The gap can be reduced, and the operating noise can be reduced.

As shown in FIG. 5, the elasticity imparting means 1 of the present invention can also be achieved by a plurality of spirally formed slits 7 in the ring-shaped portion 6. According to this configuration, more effective displacement of the pitch circle position can be expected.

[0017]

As described above, according to the present invention, the toilet seat
The operating noise from the gear train when opening and closing the toilet lid can be reduced by providing an elasticity imparting means such as a concave portion in a ring-shaped portion between the tooth portion and the shaft portion of the gear, and the product quality can be improved. Things.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a mechanism of an automatic toilet seat and toilet lid opening / closing device according to the present invention.

FIG. 2 is a configuration diagram of the apparatus of FIG. 1 viewed from a direction E.

FIG. 3 is a front view showing one gear constituting the gear train of the present invention.

FIG. 4 is a side view of the gear shown in FIG. 3;

FIG. 5 is a front view of a gear according to another embodiment.

FIG. 6 is an exploded perspective view showing a relationship between a rotating shaft, a toilet lid, and a toilet seat.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Elasticity imparting means, 2 (22, 23, 24, 25) ... Gear (gear train), 3 ... Shaft part, 4 ... Gear body, 4a ... Tooth part, 6 ... Ring-shaped part, 7 ... Slit, 11 ... Main body Unit, 12: toilet lid, 13: toilet seat, 14: rotating shaft, 15: opening / closing unit, 21: drive motor.

Claims (2)

[Claims] A drive motor for opening and closing at least one of a toilet lid and a toilet seat is provided between a rotation support shaft of the rotation member and an output shaft of the drive motor. And a gear train comprising a plurality of gears for reducing and transmitting rotation from the drive motor. An automatic toilet seat and toilet lid opening / closing device, wherein an elasticity imparting means for reducing the rigidity of the ring-shaped portion is provided in a plate-shaped ring-shaped portion between the ring-shaped portion and the tooth portion. 2. The toilet seat and toilet lid automatic opening / closing device according to claim 1, wherein the elasticity imparting means is a hole or a concave portion or a spiral or radial slit scattered in a circumferential direction formed in the ring-shaped portion.