JP2636365B2 - Automatic toilet seat opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an automatic opening / closing device for a toilet seat in a Western-style toilet, and more particularly, to a speed at which a toilet seat and a toilet lid rise and close. It is.

(Prior Art) In recent years, the use of Western-style flushing toilets has increased, and device technology for manually opening and closing the toilet seat, toilet lid, and the like has come to be seen for the purpose of improving hygiene and added value. These automatic opening and closing devices are required to be miniaturized due to various restrictions, and therefore, a small DC motor is often used as a drive motor.

As this type of technology, Japanese Patent Laid-Open Publication No. Sho 61-147097 discloses a technology in which a drive motor is driven at a rated voltage when a toilet seat is opened, and reversely driven at a low voltage when a toilet seat is closed.

(Problems to be Solved by the Invention) As shown in FIG. 3, when the toilet seat is opened and closed, the required torque is greatly fluctuated depending on the raising or lowering or the elevation angle.

Therefore, when a DC motor is used as the drive motor, the number of rotations changes greatly.

For this reason, the toilet seat opener opens slowly at the beginning, increasing the elevation angle and increasing the speed. After 90 degrees (vertical standing), the torque becomes the opposite direction, and the speed further increases. Even if there is an upper limit switch, overrun occurs, and an undesired overstress is applied to the device. Also, when the toilet seat is closed, the reverse torque is applied most at the time of closing, so even if the drive voltage is used lower than when closed, the falling speed is large,
There are inconveniences such as generating an impact sound on the toilet. If the voltage is further reduced to reduce this, the initial stage of the closing operation becomes slow motion, which causes discomfort.

In the present invention, in view of the above-mentioned conventional problems, the present invention is designed to keep the rotation speed of the toilet seat rotating shaft constant even when the torque fluctuates.

[Configuration of the invention]

(Means for Solving the Problems) In order to solve the above problems, the present invention takes the following measures. That is, a rotary shaft is provided that rotates together with the toilet seat and the toilet lid in the forward and reverse directions via a number of reduction gears from a drive motor, and the reduction gear shaft is relatively connected to the motor shaft and has a relatively high rotational speed. A rotating body having a characteristic that the outer diameter is increased by a force is arranged. Then, a cylindrical cavity having an inner diameter slightly larger than the outer diameter of the rotating body at rest is formed integrally with the housing so as to receive the rotating body.

(Operation) The rotation speed of the drive motor shaft changes with the fluctuation of the required torque during the opening and closing operation of the toilet seat and the toilet lid. However, the rotation speed increases, the outer diameter of the rotating body increases, and Produces rotational friction. Accordingly, the rotation brake is applied to the motor shaft (the reduced rotation shaft). As the speed of the rotating body increases, the coefficient of friction increases. As a result, the number of rotations of the motor shaft increases or decreases in relation to the degree of expansion of the rotating body, and operates so that the speed of the toilet seat rotation shaft is constant.

(Embodiment) In FIG. 1, 1 is a toilet seat, 2 is a switchboard disposed on a wall surface, and 3, 4, and 5 each show a toilet lid, a toilet seat, and a water tank. Reference numeral 6 denotes a support case mounted between the toilet seat 1 and the water tank 5, and as can be seen from the figure, a toilet seat automatic opening / closing device 8 according to the present invention is mounted on one side mounting portion 7.

The automatic opening and closing device includes a drive motor 9, a reduction gear group 10,
The rotation shaft 11 and the housing 12 are transmitted to the rotation shaft 11 while the rotation speed of the drive motor 9 is reduced to 1/300 or less. The rotating shaft 11, the toilet seat 4, and the toilet lid 3
Are engaged to perform these opening and closing operations. The drive motor 9 is a DC motor for reducing the installation area. Thus, when the motor rotates at high speed together with the gear 13 via the gear 13 on the motor shaft 9a of the DC motor,
A rubber-like rotating body 14 whose centrifugal force spreads is connected. Then, a hollow cavity 15 having a cylindrical shape with an outer diameter slightly smaller than when the rotating body 14 spreads is formed integrally with the housing 12,
The rotating body 14 was inserted into the cavity 15, and the motor was fixed to the housing 12. This helps the motor 9 to rotate at a constant speed and governs its operation.

Accordingly, a DC motor is used as the drive motor 9 to drive a motor having a large additional variation while keeping the intended opening / closing speed constant.

In particular, due to the speed increase when the toilet seat is closed, the impact noise generated by colliding with the toilet is eliminated.

In this embodiment, the rotating body 14 is provided on the reduction shaft near the motor, but this may be provided on the motor shaft.

〔The invention's effect〕

In the present invention, since the procurement mechanism is provided on the reduction gear shaft (or the motor shaft) close to the motor, the friction torque for procurement can be reduced.

Therefore, the size of the procurement mechanism can be reduced, and the wear of the rotating body due to friction is reduced, and the durability is improved.

In addition, no control circuit is required electrically, and the cost is low.

[Brief description of the drawings]

1 and 2 are explanatory views of an embodiment of the present invention, FIG. 3 is a toilet seat,
It is a figure which shows the elevation angle of a toilet lid, and required torque. 1 ... toilet bowl, 3 ... toilet lid, 4 ... toilet seat, 9 ... drive motor, 9a ... motor shaft, 10 ... reduction gear, 11 ... rotating shaft, 12 ... housing, 13 ... gear , 14 …… Rotating body, 15 …… Cavity.

Claims (1)

(57) [Claims] 1. A drive motor through a number of reduction gears,
A rotating shaft that rotates together with a toilet seat and a toilet lid in forward and reverse directions is provided, and a rotating body having a characteristic that its outer diameter increases due to centrifugal force is provided on the drive motor shaft or a reduction gear shaft having a large number of rotations close to the motor. Locked, a cylindrical cavity having an inner diameter slightly larger than the outer diameter of the rotating body is formed integrally with the housing, and when inserting the rotating body, the toilet seat and the toilet lid are raised and closed, the speed is increased. An automatic opening / closing device for a toilet seat that is almost equivalent.