JPH06121755A - Automatic stool and stool lid opening and closing device - Google Patents

Abstract

PURPOSE:To quickly open a stool and stool lid without enlarging a drive motor. CONSTITUTION:An automatic stool and stool lid opening and closing device is provided with a drive motor 11 for drivably opening and closing the stool 4 and a power transmitting means for transmitting the torque of the drive motor 11. A first elliptical gear 16 is disposed at the drive motor side of the power transmitting means and a second elliptical gear 17 meshing with the first elliptical gear 16 is disposed at the stool 4 side. The reduction gear ratio from the first elliptical gear 16 to the second elliptical gear 17 is large in the position of the closed stool and reduced as the stool is shifted to the opened position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically opening and closing a toilet seat and a toilet lid.

[0002]

2. Description of the Related Art Conventionally, there has been known an automatic opening / closing device which eliminates a manual opening / closing operation and automatically opens / closes a toilet seat and a toilet lid by a motor. In a conventional automatic opening / closing device, a rotating shaft of a toilet seat or a toilet lid is coupled to a drive shaft of a motor via a speed reduction mechanism, and the toilet seat or the toilet lid is opened / closed as the motor rotates. Further, since the reduction mechanism is composed of the spur gear and the worm, the reduction ratio and the torque transmission ratio from the open position to the closed position are always constant.

[0003]

By the way, since a large torque is required at the beginning of opening the toilet seat and the toilet lid, the reduction ratio and the torque transmission ratio have been designed according to the beginning of opening.

However, in order to output the large torque required to start opening, it is sufficient to increase the speed reduction ratio of the speed change mechanism. However, the higher the speed reduction ratio, the lower the opening / closing speed of the toilet seat and the toilet lid. There is. On the contrary, if the reduction ratio is reduced, the opening / closing speed of the toilet seat is increased, but the transmitted torque is decreased, so that a larger motor is required.

Therefore, a technical object of the present invention is to quickly open and close the toilet seat and the toilet lid without increasing the size of the drive motor.

[0006]

[Constitution of the invention]

[0007]

Means for Solving the Problems To solve the above problems, the technical solution provided by the present invention is a toilet seat and a toilet lid, and a drive motor for opening and closing the toilet seat and the toilet lid.
In a toilet seat / toilet lid automatic opening / closing device including power transmitting means for transmitting torque of the drive motor to the toilet seat and the toilet lid, the power transmitting means includes a first elliptical gear arranged on the drive motor side, and A second elliptical gear that is disposed on the toilet seat and the toilet lid side and that meshes with the first elliptical gear; when the toilet seat and the toilet lid are in the closed position,
The automatic seat opening / closing device is characterized in that the reduction gear ratio to the elliptical gear is large and the reduction gear ratio decreases as the gear shifts to the open position.

[0008]

According to the above construction, since the torque of the drive motor is transmitted by the first elliptical gear and the second elliptical gear, the reduction ratio changes. Since the reduction gear ratio is large when the seat and the lid are opened, a large torque is transmitted from the drive motor to the seat and the lid side. In addition, since the reduction ratio decreases as the toilet seat and the toilet lid open, the opening speed increases. Therefore, a quick opening operation is performed without increasing the size of the drive motor.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. Since the toilet seat and the toilet lid have substantially the same opening / closing mechanism, the toilet seat will be mainly described below.
The toilet lid is omitted.

FIG. 1 shows the external appearance of a toilet seat / toilet lid automatic opening / closing device 1 of this embodiment. The main body unit 2 of the toilet seat / toilet lid automatic opening / closing device 1 is fixed to the rear upper surface of the toilet bowl 9, and the rear end portions of the toilet lid 3 and the toilet seat 4 are rotatably disposed on the main body unit 2. There is. Further, in the main body unit 2, in addition to the automatic opening / closing unit 5 (FIG. 2) which is a feature of the present invention, a warm air drying unit and a cleaning nozzle unit (both not shown) are incorporated. The operation of the warm air drying unit and the cleaning nozzle unit is performed by pressing the switch 6a on the operation box 6 fixed to the wall of the toilet room or the switch 7b on the operation panel 7 provided on the main unit 2. Be seen. Further, the operation of the automatic opening / closing unit 5 is performed by a switch (not shown) provided in the lid 6b of the operation box 6, but in the present embodiment, the human detection provided near the operation panel 7 is performed. It is also detected by the sensor 8. For example, when the human detection sensor 8 detects a user in the toilet room, a signal is transmitted to the microcomputer 30 as a control means, and the toilet lid 3 is automatically
The automatic opening / closing unit 5 is instructed to open.

Next, the automatic opening / closing unit 5 will be described. As shown in FIGS. 2 and 3, in the casing 5a of the automatic opening / closing unit 5, a toilet lid automatic opening / closing unit (not shown) for automatically opening / closing the toilet lid 3 and an automatic opening / closing of the toilet seat 4 are provided. The toilet seat automatic opening / closing unit 10 is built in.

The toilet seat automatic opening / closing unit 10 uses a drive motor 11 as a drive source, and when the drive motor 11 operates, a first reduction mechanism 13 sequentially connected to an output shaft 11a (FIG. 3) of the drive motor 11, Second reduction mechanism 14 and third
The rotating shaft 19 of the toilet seat 4 is adapted to be rotated via a power transmission means composed of the speed reduction mechanism 15.

The first reduction gear mechanism 13 and the second reduction gear mechanism 14 are
Both are composed of a spur gear and a worm, and the spur gear 1 of the first reduction mechanism 13 is attached to the output shaft 11a of the drive motor 11.
3a and the worm 13b of the first reduction mechanism 13 are in mesh with the spur gear 14a of the second reduction mechanism 14, respectively. The third reduction gear mechanism 15 is composed of a spur gear 15a meshing with the worm 14b of the second reduction gear mechanism 14 and a first elliptical gear 16 arranged coaxially with the spur gear 15a. Further, the first elliptical gear 16 is adapted to mesh with the second elliptical gear 17 arranged on the rotating shaft 19 of the toilet seat 4.

The first elliptical gear 16 has a small diameter portion 16a that is short from the center of rotation to the tip and a large diameter portion 16b that is long from the center of rotation to the tip. Similarly, the second elliptical gear 17 also has a small diameter portion 17a that is short from the center of rotation to the tip,
It has a large diameter portion 17b that is long from the center of rotation to the tip. As shown in FIG. 2, when the toilet seat 4 is in the closed position, the small diameter portion 16a of the first elliptical gear 16 is arranged so as to mesh with the large diameter portion 17b of the second elliptical gear 17. . The meshing position moves as the toilet seat 4 opens, and when the toilet seat 4 reaches the open position shown in FIG. It is supposed to do.

Further, a spring 20 is arranged at the end of the rotary shaft 19. The spring 20 has a projecting portion 21 arranged at one end on the rotary shaft 19 and at the other end on the casing 5a.
The seats 4 are respectively locked to the seats 4 to urge the seat 4 in the opening direction to reduce the impact when the seat 4 is closed.

A rotary motion detection sensor 27 is provided at the tip of the output shaft 11a of the drive motor 11. The rotational movement detection sensor 27 rotates with the rotation of the output shaft 11a, and a detected body (not shown) in which N and S pole magnets are alternately arranged, and a detected body arranged on the casing 5a side. It is composed of Thus, when the drive motor 11 operates and the output shaft 11a rotates, the continuous H, L, H, and L signals shown in FIG. 5A are output to the microcomputer 30,
It is designed to notify that the toilet seat 4 is rotating.

In order to select whether the rotary shaft 19 fixed to the rotary shaft 19 of the toilet seat 4 is in a mode in which the toilet seat 4 can be closed in the open state or in a closed state. The mode detection sensor 18 of the rotary shaft 1
The detected body is attached to the 9 side and the detected body is attached to the casing 5a side. The detected object is an N-pole permanent magnet 18N.
And an S-pole permanent magnet 18S. Further, the detection body is composed of the Hall IC 18a and is fixed to the lower side of the output gear 16. The hall IC 18a detects the permanent magnet 18S as shown in FIG. 2 when the toilet seat 4 is in the closed position and sends an "H" signal to the microcomputer 30, and when the toilet seat 4 is in the open position, The magnet 18N is detected and an "L" signal is transmitted to the microcomputer 30.

Next, the operation of this embodiment will be described. First, the opening operation of the toilet seat 4 will be described. When the user presses the switch for opening the toilet seat 4, the microcomputer 30 receives this and first determines the state of the toilet seat 4 from the signal output from the mode detection sensor 18. If the signal output from the mode detection sensor 18 is "H", it is determined that the toilet seat 4 is in the closed position, and the drive motor 11 is driven in the opening direction. The power of the drive motor 11 is generated by the first reduction mechanism 13 and the second reduction mechanism 13.
It is transmitted to the reduction gear mechanism 14 and the third reduction gear mechanism 15, and further transmitted from the first elliptical gear 16 to the second elliptical gear 17 to rotate the rotating shaft 19 of the toilet seat 4. When the toilet seat 4 starts to open, the small diameter portion 16a of the first elliptical gear 16 and the large diameter portion 17b of the second elliptical gear 17 mesh with each other, and the reduction ratio is the largest. Therefore, the torque required to rotate the toilet seat 4 is sufficiently transmitted.

As the toilet seat 4 approaches the open position, the meshing portion between the first elliptical gear 16 and the second elliptical gear 17 in the first elliptical gear 16 changes from the small diameter portion 16a to the large diameter portion 16a.
b, in the second elliptical gear 17, from the large diameter portion 17b to the small diameter portion 1
7a, and the reduction ratio becomes smaller. Since it is not necessary to apply a large torque to the toilet seat 4 that has started to rotate compared to when it started to open, it is possible to continue rotating sufficiently and
Since the reduction gear ratio becomes smaller, the rotation speed becomes faster. Therefore, the rotation is rapidly continued to the open position shown in FIG. 4, which is opened by about 90 degrees.

Thus, when the toilet seat 4 comes into contact with the casing of the apparatus main body 2 and its rotation is stopped, the rotation of the permanent magnet 27a arranged on the output shaft 11a side of the drive motor 11 stops.

As a result, the output signal of the rotational movement detecting sensor 27 is in a state in which the pulse is stopped as shown in FIG. 5 (b). The microcomputer 30 waits for t seconds after the output of the pulse signal is stopped, stops the operation of the drive motor 11, and ends the opening operation of the toilet seat 4.

Next, the closing operation of the toilet seat 4 will be described.
When the user presses the switch that closes the toilet seat 4, the microcomputer 3
In response to this, 0 first determines the state of the toilet seat 4 from the signal output from the mode detection sensor 18. If the signal output from the mode detection sensor 18 is "L", it is determined that the toilet seat 4 is in the open position, and the drive motor 11 is driven in the closing direction. The power of the drive motor 11 is transmitted to the first reduction gear mechanism 13, the second reduction gear mechanism 14, and the third reduction gear mechanism 15, and further, from the first elliptical gear 16 to the second elliptical gear 17.
Is transmitted to the rotating shaft 19 of the toilet seat 4.

Unlike when opening the toilet seat 4, unlike when opening the toilet seat 4, the large diameter portion 16b of the first elliptical gear 16 and the second elliptic gear 1 are different from each other.
Since it is meshed with the small diameter portion 17a of No. 7, the reduction ratio is smallest and the output torque is also small. However, since the torque required at the beginning of the closing operation is smaller than the torque required at the beginning of the opening operation, it can be rotated sufficiently. This is because the toilet seat 4 is open at about 90 degrees in the open position, and the angle difference between the direction in which the center of gravity of the toilet seat 4 is applied and the direction of the force required to rotate the toilet seat 4 in the closing direction is set when the opening operation is performed. It is due to its small size compared to that of.

When the toilet seat 4 rotates in the closing direction and approaches the closed position, the urging force of the spring 20 causes the toilet seat 4 to move.
The rotation speed of is gradually decreased, and the seat gently sits on the upper surface of the toilet bowl 9. The microcomputer 30 uses the rotation detection sensor 2
When it is detected from 7 that the rotation of the toilet seat 4 has stopped, the operation of the drive motor 11 is stopped, and the closing operation of the toilet seat 4 ends.

[0025]

According to the present invention, the largest torque is transmitted by the first elliptical gear and the second elliptical gear when the most torque is required at the beginning of the opening operation. can do. Further, since the opening speed becomes faster as it rotates in the opening direction, the opening operation can be performed quickly. Further, the reduction ratio gradually changes with the change in the diameters of the first elliptical gear and the second elliptical gear, so that a smooth operation is possible.

[Brief description of drawings]

FIG. 1 is an external perspective view of a toilet seat / toilet lid opening / closing device according to the present embodiment.

FIG. 2 shows a side view of the automatic opening / closing unit in a closed position of a toilet lid and a toilet seat.

FIG. 3 shows a plan view of an automatic opening / closing unit for a toilet lid.

FIG. 4 shows a side view of the automatic opening / closing unit in the open position of the toilet lid and toilet seat.

FIG. 5A shows a pulse signal output from the rotation detection sensor to the microcomputer when the toilet lid is continuously opened and closed. (B) shows a pulse signal output from the rotational movement detection sensor to the microcomputer when the opening / closing operation of the toilet lid is disturbed.

FIG. 6 shows a block diagram of a control means, a drive motor, and each detection means of this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Toilet seat / toilet lid automatic opening / closing device 3 Toilet lid 4 Toilet seat 11 Toilet seat drive motor 13 First speed reduction means (power transmission means) 14 Second speed reduction means (power transmission means) 15 Third speed reduction means (power transmission means) 16th 1 Elliptical gear 16a Small diameter part 16b Large diameter part 17 Second elliptical gear 17a Small diameter part 17b Large diameter part 30 Microcomputer (control means)

Claims (1)

[Claims] 1. A toilet seat including a toilet seat and a toilet lid, a drive motor that drives the toilet seat and the toilet lid to open and close, and a power transmission unit that transmits torque of the drive motor to the toilet seat and the toilet lid.
In the toilet lid automatic opening / closing device, the power transmission means includes a first elliptical gear arranged on the drive motor side and a second elliptical gear arranged on the toilet seat and the toilet lid side and meshing with the first elliptical gear. And when the toilet seat and toilet lid are in the closed position,
An automatic opening / closing device for a toilet seat / lid, characterized in that the reduction ratio from the first elliptical gear to the second elliptical gear is large, and the reduction ratio decreases as it moves to the open position.