JPS589212B2 - Toilet cleaning control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toilet flush control device that operates to supply flush water to the toilet bowl only when the user operates a manual switch or when the user leaves a predetermined position. It is something.

If a manual switch is provided to supply flushing water to the toilet bowl when it is manually operated, and a human body detector is provided to automatically supply flushing water after use, flushing will be performed by one manual operation. Even after washing, washing water is supplied again by the operation of the human body detector, which is preferable from a sanitary point of view, but it results in a waste of washing water.

This invention when no manual operation was performed? Cleaning water is automatically supplied by the operation of the human body detector, but after manual cleaning has been performed, automatic cleaning is controlled so that it does not occur, thereby ensuring an effective and efficient cleaning operation. The purpose of the present invention is to provide a toilet bowl flushing control device that can be used to clean a toilet bowl.

An example of the present invention will be described below with reference to the drawings.

A rectifier circuit indicated by reference numeral 1 in FIG. 1 rectifies the AC output taken out from the AC power supply 2 via the power switch 3 and fuse 4, and
This is for supplying an operating current to the gate circuit for triggering the photocoupler 2 through the light receiving element 6b of the photocoupler.

This light-receiving element 6b is an element whose resistance value decreases when it receives light from a light-emitting element 6a, which will be described later, and at this time, thyristors Q1 and Q2 are rigged.

When the thyristors Ql and Q2 conduct, the water supply control mechanism connected as the load (this includes an electromagnetic siphon, an electromagnetic flush valve, or a solenoid for driving the water supply valve, but in this case, it is the electromagnetic valve 7) ) is supplied with an operating current, which causes flushing water to flow into the toilet bowl.

On the other hand, the current taken out from the AC power supply 2 passes through a step-down transformer 8, is rectified by a rectifier circuit 9, is further voltage-adjusted by a regulator 10, and is then supplied to the next stage circuit.

Further, a human body detector 5 indicated by the reference numeral 11 is for detecting when a user of the toilet is present in a predetermined position or area, and a switch S1 which is closed when the human body detector 5 is detected is detected.
have.

As means for closing this switch S1, a mechanical drive mechanism using the user's weight as a drive source, a photocoupler that optically detects when the user enters the optical path, or the like can be used.

When this switch S1 is off, an H level output is output via the resistor R1 and diode D1, but when it is on, the output level becomes L.

When this detection signal goes to L level, transistor Q3, which had been kept on until then, turns off.

The signal obtained by the on/off operation of this transistor Q3 is sent to the next delay circuit 12.

The delay circuit 12 generates an output signal of H level at its output terminal when its input terminal is held at L level for more than a first set time T3, and also generates an output signal of H level when the level of its input terminal changes from L to H. After a second set time T4, a delay switching operation is performed to change the level of the output terminal from H to L.

Such an operation can be realized by a circuit configured by combining a comparator with a time constant circuit having different time constants during charging and discharging.

The output signal of this delay circuit 12 is then supplied to a one-shot circuit 13.

The one-shot circuit 13 includes an operational amplifier U1 and a resistor R2.
R6 and a capacitor C1, when the output level of the delay circuit 12 changes from H to L, the operational amplifier U
This one-shot pulse, which is configured to generate a one-shot pulse of a constant width on the output side of the drive signal generator 1, passes through resistors R7 and R8 and a diode D2, and is supplied to the signal processing circuit 16 of the drive signal generation circuit 15. Ru.

Furthermore, the one-shot pulse is generated by the memory circuit 17, which will be described later.
is also fed to the set input of

On the other hand, the manual operation circuit 14 including the manual switch S2, resistors R9 to R11, and capacitors C2 and C3 supplies an H level signal to the signal processing circuit 16 via the diode D3 only while the manual switch S2 is on. .

The signal processing circuit 16 generates an output signal at the TIH level for a certain period of time after either or both of the outputs of the one-shot circuit 13 and the manual operation circuit 14 become H level, and this signal is applied to the base of the transistor Q4. Supplied.

This turns on the transistor Q4, and the light emitting element 6a connected as its collector load emits light.

Since this light emitting element 6a constitutes a photocoupler together with the aforementioned light receiving element 6b, the solenoid valve 7 operates in response to a drive signal generated only while the transistor Q4 is on.
Cleaning water is supplied.

Note that the signal processing circuit 16 generates the drive signal and then inputs it for a predetermined time T2 in order to eliminate the inconvenience that the manual switch S2 is turned on many times in a short period of time, causing cleaning water to flow each time. It is desirable to have an inhibiting function that blocks signals.

The output signal of the signal processing circuit 16 is also supplied to the memory circuit 17.

The memory circuit 17 has a flip-flop 17a composed of four NAND gates G1 to G4, the output signal of the signal processing circuit 16 is input to the first input terminal IN1, and the delayed signal is input to the second input terminal IN2. The output signals of the circuits 12 are respectively provided.

This flip-flop 17a is set when both the first and second inputs IN1 and IN2 are at H level.
It is reset when the first input IN1 becomes L level, and does not depend on the level of the second input IN2.

The H level or L level signal appearing at the output F of the flip-flop 17a is supplied to the base of the transistor Q5.

When this transistor Q5 is on, it acts to block the output signal by connecting the output terminal of the one-shot circuit 13 to a common. In other words, the transistor Q5 is turned on only when the flip-flop 17a is set. This is the period during which

Now, if the human body detector 11 detects the presence of a human body, the output terminal of the delay circuit 12 will be at H level, but if the manual switch S2 is not operated in this state, the output terminal of the signal processing circuit 16 will be at H level. Since it remains at L level, flip-flop 17a is not set.

However, when the manual switch S2 is operated in this state, the output terminal of the signal processing circuit 16 becomes H level for a certain period of time, and at this time a drive signal is generated and the flip-flop 17a is set.

As a result, the output terminal of flip-flop 17a becomes H level, and a predetermined base bias is applied to transistor Q5.

In this state, even if the one-shot circuit 13 generates a one-shot pulse after the human body detector 11 no longer detects the presence of a human body, this pulse flows to the common through the transistor Q5, so the signal processing circuit 16 never works.

A time chart of each signal is shown in FIG.

As explained above, according to the present invention, the operation of supplying a predetermined amount of flushing water to the toilet bowl is performed by the shot pulse generated when the human body leaves a predetermined position or when a manual switch is operated. However, when water is supplied manually, the fact that this operation has been performed is stored in the memory circuit, and the output of this memory circuit is
The one-shot pulse for automatic watering is blocked when the human body leaves the predetermined position.

This eliminates the inconvenience of automatic water supply immediately after manual water supply, resulting in water savings.

Note that the memory in the memory circuit is cleared by a one-shot pulse when the human body leaves the predetermined position, and returns to the initial state.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a device according to an actual case of the present invention, and FIG.
The figure is a time chart of signals at each part of FIG. 1. 5... Drive circuit, 6a... Light emitting element,
6b... Light receiving element, 7... Solenoid valve, 1
1... Human body detector, 12... Delay circuit, 13... One shot circuit, 14...
・Manual operation circuit, 15... Drive signal generation circuit,
16...Signal processing circuit, 17...Memory circuit, 17a...Flip-flop.

Claims (1)

[Claims] 1. A human body detector that generates an output signal only while detecting that a human body is present in a predetermined position, and a one-shot pulse of a fixed width when the output signal from this human body detector disappears. A one-shot circuit, a manual operation circuit that generates an output signal by operating a manual switch, and a signal processing circuit that operates for a certain period of time when either one of the output signals of the one-shot circuit or the manual operation circuit is supplied. a drive signal generation circuit that generates a drive signal and supplies the drive signal to a drive circuit for supplying flush water to the toilet bowl; When the above drive signal generation circuit generates the 5 drive signal according to the output signal, this drive signal is memorized, and it is cleared when the above human body detector no longer detects the presence of a human body, and while it is in the memorized state. and a memory circuit that generates an output for preventing the output signal of the one-shot circuit from being supplied to the drive signal generation circuit.