JPH0762362B2 - Toilet flush device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a toilet flushing device which is a sanitary equipment.

2. Description of the Related Art A conventional toilet bowl flushing apparatus has a tank 3 mounted on the toilet bowl 1 as shown in FIG. 3, and by operating a flushing lever 8 provided on the toilet bowl 3, a drive shaft 7 and an arm 6 are provided. , Chain 5
A general one for opening the valve 4 via a valve, a semi-automatic device for actuating the solenoid 24 by the signal of the foot switch 26 in FIG. 4 to open the valve 4 and flush the toilet bowl, JP-A-59-9894
1, JP-A-59-170337, JP-A-59-102027
As disclosed in Japanese Patent Laid-Open No. 60-55136 and Japanese Patent Laid-Open No. 60-55136, there has been an electromagnetic biasing means for opening the valve.

Problems to be Solved by the Invention In the example shown in FIG. 3, since it is necessary to operate the flush lever without fail after the urination, the user feels complicated and a plurality of people touch the flush lever. Moreover, if the user forgets to operate the washing lever, there is a problem that a foul odor is emitted, and it is difficult for a small child or an old person to operate.

Even in the example of FIG. 4, it was not possible to add the flushing function by making the operation complicated each time, the bad odor and divergence when forgetting, the equipment being expensive, and the existing toilet bowl being slightly improved.

Further, the one provided with the electromagnetic urging means is not cheap.

Means for Solving the Problems In order to solve the above problems, the present invention is provided in the seating detection means for detecting that a person is sitting on the toilet seat, and in the lower part of the tank for storing the water for flushing the toilet bowl. A chain connected to the valve, an arm that pulls up the chain, and an arm drive device made of a shape memory alloy that drives the arm are provided, and the arm drive device changes the signal of the seating detection means from on to off. It is a toilet bowl flushing device that operates when turned on.

Operation With the above-mentioned configuration, the sitting detection means detects the rising of the user after toilet, and the toilet bowl is automatically flushed with water.

Embodiment Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2. In the toilet device 2 mounted on the existing toilet 1, the toilet seat 32 and this toilet seat are rotatable and seating detection is performed. Has a rotating shaft 34 for pushing the gravity switch 33, a lead wire 36 for transmitting a detection signal to the arm driving device 35, and a manual flushing lever 8 for a power failure or the like to wash the toilet bowl with water. The tank 3 for storing water is equipped with a valve 4, a chain 5 for pulling up the valve, and an arm 6.

Next, the arm driving device 35 will be described with reference to FIG. The drive shaft 7 has an arm 6 and a pin / shaft 17 for fixing the arm, and a shape memory alloy (hereinafter referred to as SMA) 10 and a balance spring 14 are attracted to the other end of the shaft in the rotational direction of the drive shaft. It is mounted in such a shape.
A chain 5 is attached to the tip of the arm. The corner portion 12 of the collar 13 is inserted into the square hole 9 of the tank 3 and is fastened with the collar portion 11, the rim 15 and the nut 16. Further, the drive shaft 7 is inserted into the collar 13 and the other end 19 of the drive shaft is
Is pressed by the serration portion 20 of the water washing lever 8 and is tightened by the screw 21. Although not shown, lead wires for passing a current are connected to both ends of the SMA 10.

SM when not in use, that is, when valve 4 is closed and water is accumulated
A10 is in an extended state, balance spring 14 is in a contracted state, and arm 6 and chain 5 are in a lowered state. Next, the arm drive device 35 is actuated by the seating detection signal of the toilet device 2, but in reality, the seating detection signal is turned off, that is, the arm driving device 35 is delayed so as to be actuated after a certain time (several ten seconds) after being separated. It is also necessary to take precautions to prevent malfunctions that do not work with temporary OFF signals during stools.

When an actuation signal is received, a current flows through the SMA 10, and the SMA 10 contracts (or extends) due to self-heating, the shaft 17 is urged, the drive shaft 7 rotates, and the arm 6 also rotates at the same time. Pulling up Further, the valve 4 is pulled up and opened, and the water accumulated in the tank 3 is poured into the toilet bowl 1 for washing with water. It is necessary to set the energization time of the SMA 10 so that the valve 4 will close naturally when the water in the tank is exhausted, and to return it to the original expanded (contracted) state in a short time by natural heat dissipation.

EFFECTS OF THE INVENTION As is clear from the above, the toilet flushing device of the present invention automatically drives the drain valve provided at the bottom of the tank to open in response to a signal from the seating detection device provided in the heated toilet seat, hot water cleaning device, etc. And, by using SMA, the following effects can be obtained.

1) It can be easily and inexpensively attached to the existing toilet bowl simply by replacing the parts of the flush lever.

2) It does not bother the user's hands and does not feel complicated, and it is clean and easy to use even for children and the elderly.

3) No bad odor is emitted due to forgetting the washing operation.

[Brief description of drawings]

FIG. 1 is an exploded sectional view of essential parts of a toilet flushing device according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIGS. 3 and 4 are side views of a conventional toilet flushing device. 1 ... Toilet bowl, 2 ... Toilet bowl device, 3 ... Tank, 4 ...
Valve, 5 ... Chain, 6 ... Arm, 7 ... Drive shaft, 10 ... SM
A, 32 ... Toilet seat, 33 ... Gravity switch, 34 ... Toilet seat rotating shaft, 35 ... Arm drive device, 36 ... Lead wire.

Claims (1)

[Claims] 1. A seating detection means for detecting a person sitting on a toilet seat, a chain connected to a valve provided at a lower portion of a tank for storing water for flushing the inside of a toilet bowl, and an arm for pulling up the chain. And an arm drive device made of a shape memory alloy for driving the arm, the arm drive device operating when a signal from the seating detection means is changed from on to off.