JPH0118219B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a flushing device for a flush toilet.

Construction of conventional examples and their problems The most common conventional toilet flushing device includes a valve opening means for opening and driving a valve located in a cistern to release water stored in the cistern, and a through hole in the cistern wall. The rotary shaft is provided through the cistern wall and has one end connected to the valve opening means and the other end outside the cistern wall connected to a manual lever. Most of them were energized by hand. However, flushing is not always done at the end of using the toilet; it is often necessary to flush even when sitting on the toilet seat with your back to the cistern, and this is especially true for women. . However, this required the user to twist around while sitting on the toilet seat, making it extremely difficult to use and especially painful for the elderly and children.

To do this, we replaced the manual lever with an electromagnetic drive means such as a rotary solenoid or DC motor that rotates a certain angle and returns, and replaced it with an electric drive. A toilet flushing device configured to drive the toilet was also considered. FIG. 1 shows a diagram of the device installed in a toilet bowl. 1 is cistern, 2 is toilet bowl, 3 is toilet seat, 4
5 is a toilet seat rear case, 5 is an outer case of a toilet flushing device, 6 is a flush switch, and 7 is an electric wire.

Figure 2 is a side sectional view of the toilet flushing device;
The figure is a perspective view seen from the A side. 8 is a valve seat provided at the bottom of the cistern 1, 9 is a drain port leading to the toilet seat 2, 10 is a valve that opens and closes the valve seat 8, and 11 is the valve 1.
0 is a chain that opens and closes, and 12 is a through hole in the cistern wall 1, which is usually a square hole. The cistern 1 also has an arm 13 as a valve opening means, and a chain 11 is connected to the end of the arm 13.
The valve 10 is configured to be opened and closed by the swinging motion of the valve 10. Reference numeral 14 denotes an inner case, which is fixed to the cistern 1 by tightening a nut 16 to a threaded portion 15, and holds the outer case 5 and other members. 17 is an electromagnetic drive means having a structure that returns to the original position after a certain rotation; 18 is a rotating shaft, one end of which is connected to the arm 1;
3, the other end is coupled to electromagnetic drive means 17.

When washing with water in the above configuration, when the electromagnetic drive means 17 is energized, the rotating shaft 18 is rotated to swing the arm 13 from the X→Y→X position, and the valve 1
0 can be opened and closed to wash with water.

By the way, generally speaking, the force required to open the valve 10 is 10 kg, including allowance, when the cistern is full of water.
Requires a large value of cm. In addition, so-called reversible electromagnetic drive means 1 that returns to the original position after a certain rotation
7, a rotary solenoid or a DC motor is generally used, but when a rotary solenoid is used, in order to exert a force that overcomes the valve opening force mentioned above, it momentarily generates a current close to a short circuit state. Therefore, it is necessary to use a large and expensive full-wave rectifier to supply the power, and since it rotates with a large force instantaneously, the moment it reaches the Y position, The moment the power was turned off and returned to the X position, a loud ``clacking'' sound was generated, which became a problem in the toilet where noise should be avoided as much as possible. When using a DC motor, there is no problem with noise, but in order to exert the force that overcomes the valve opening force mentioned above, a DC motor is used as a power source.
If the motor uses 100V, the motor will be too large, making it unsuitable for installation in a cistern.If the motor uses low voltage 100V DC,
Although the motor can be made smaller, it has the disadvantage that the power transformer is large and expensive, and the circuit for reversibly driving the DC motor is complicated and expensive.

Purpose of the invention The present invention solves such conventional problems,
It is an object of the present invention to provide a toilet flushing device using an AC motor in which both the motor itself and the power source for the motor can be made inexpensive and compact.

Structure of the Invention In order to achieve the above object, the present invention includes an AC motor located outside a cistern wall and coupled to rotate a rotating shaft; A rotation angle biasing means, a drive cam that is located inside the cistern wall and rotates jointly with the rotation shaft, and an arm that swings as the drive cam rotates, and the swing of the arm causes the The cistern is flushed by opening and closing the valve at the bottom of the cistern.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 7.

FIG. 4 is a side sectional view, and FIG. 5 is a front view seen from direction B, and 19 is an AC motor (usually a geared motor) connected to one end of the rotating shaft 18;
20 is a drive cam connected to the other end of the rotating shaft 18;
21 is the ear portion of the arm 13 that rides on the drive cam 20;
2 is a pin, and 23 is a support member that rotatably supports one end of the arm 13 by means of the pin 22. The constant rotation angle biasing means for biasing the AC motor 19 by a predetermined rotation angle includes a rotation angle determining cam 24 coupled to one end of the rotation shaft 18 and a micro switch 2.
5.

The shape of the rotation angle determining cam 24 and the mounting state of the micro switch 25 are shown in FIG. The rotation angle is defined as one rotation of 360 degrees.

FIG. 7 shows a circuit diagram for energizing the AC motor 19, in which 27 represents an AC power source, and 28 represents a member attached to the cistern 1 side.

When it is desired to perform water washing in the above configuration, the water washing switch 6 is turned on. Then the AC motor 19
An alternating current power supply 27 is applied to the rotation angle determining cam 2.
4. The rotating shaft 18 and the drive cam 20 start rotating.
When rotation starts, the micro switch 25 is turned on by the rotation angle determining cam 24, so even if you take your hand off the flush switch and turn it off, the application of the AC power 27 to the AC motor 19 is maintained, and the AC motor 19 continues to rotate. Subsequently, the ear portion 21 of the arm 13 rides on the top portion a of the drive cam 20, thereby lifting the arm 13 from the X position to the Y position. Therefore, the valve 10 is opened to flush the toilet bowl 2, and the valve 10 is opened to flush the toilet bowl 2.
The opening is maintained by the force of the water flow itself flowing between 0 and the toilet seat 8 until the water flow disappears. On the other hand, when the rotation angle determining cam 24 rotates once and returns to the state shown in FIG.
returns to position X in Figure 5 and stops. Cistern 1
When all the water stored in the valve is released and the water flow between the valve 10 and the valve seat 8 decreases, the valve 10 closes under its own weight.
Water storage in the cistern will start again. Therefore, water washing can be performed automatically by turning on the water washing switch 6 instantaneously.

In the above configuration, an example is shown in which flushing is performed by turning on the flush switch 6, but it is also possible to use a micro switch that is turned on based on the body weight, for example, when a person stands up after sitting on the toilet seat. Fully automatic water washing is also possible due to the circuit configuration that detects this and turns on the AC motor 19.

Effects of the Invention As described above, the toilet flushing device of the present invention provides the following effects.

The structure is such that the drive cam is rotated by an AC motor, and the rotation of the drive cam is replaced by the swinging of the arm to open and close the valve, so the operation does not involve reversal of rotation, so there is no operating noise, impact noise, etc. in the toilet. It produces less noise, which is the most disliked noise.

Since the valve is opened and closed using an AC motor,
This eliminates the need for large currents or power transformers as a power source, and the energizing circuit can be simplified.
The structure is small and inexpensive.

Furthermore, the device itself attached to the cistern can be configured to be compact, and the toilet seat can be opened and closed easily. In addition, due to the balance with the size of the cistern, it can be configured with less discomfort.

[Brief explanation of drawings]

Fig. 1 is a diagram of a toilet bowl installed in a conventional toilet flushing device, Fig. 2 is a side sectional view of the same device, Fig. 3 is a perspective view thereof, and Fig. 4 is a side view of an embodiment of the toilet flushing device of the present invention. 5 is a front view of the same, FIG. 6 is a diagram showing the shape of the rotation angle determining cam and the installation state of the micro switch in the same device, and FIG. 7 is a biasing circuit diagram of the same device. 1... Cistern wall, 5... Outer case, 6...
Flushing switch, 10... Valve, 11... Chain, 12...
...Through hole, 13...Arm, 18...Rotation shaft, 1
9... AC motor, 20... Drive cam, 21...
Ear portion, 22... pin, 23... support member, 24...
...Rotation angle determining cam, 25...Micro switch (together with 24 constitutes constant rotation angle biasing means).

Claims (1)

[Claims] 1. A rotary shaft penetrated through a through hole in a cistern wall for a flush toilet, an AC motor located outside the cistern wall and coupled to the rotary shaft for rotationally biasing the rotary shaft, and the AC motor. a constant rotation angle biasing means that biases the rotation angle by a given rotation angle; a drive cam that is located inside the cistern wall and is coupled to the rotation shaft and rotates together with the rotation shaft; A toilet flushing device comprising a movable arm, which flushes by opening and closing a valve at the bottom of the cistern by swinging the arm.