JP2889438B2 - Water supply control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for resetting a control unit in a water supply device using a battery as a power source even when there is a charge in the control device when the battery is replaced.

[0002]

2. Description of the Related Art A water supply control device using a battery as a power supply has been conventionally known, for example, from Japanese Patent Publication No. 4-33434. In this conventional example, when the battery is exhausted,
It is designed to be replaced with a new one.

[0003]

However, in the above-mentioned prior art, if the charge of the control device remains, resetting when a new battery is installed becomes uncertain, and a malfunction of the control device occurs. There was a drawback of doing. The present invention has been made in view of the above-described problems of the conventional example, and has as its object to reliably reset the control unit even when the battery is replaced while the charge of the control device remains. It is to provide a water supply control device which can be used.

[0004]

SUMMARY OF THE INVENTION A water supply control device according to the present invention comprises a washing machine, a light sensor having a light projecting element and a light receiving element, and a human body detecting apparatus for detecting a human body by the light sensor and outputting a sensing signal. And a control unit 4 that outputs an open / close signal to the water supply unit 3 based on the input of the sensing signal from the human body sensing device 2, and a water supply unit 3 that opens and closes a valve by inputting the open / close signal from the control unit 4. In the water supply control device provided with the battery 5 as a power source, the control unit 4 is provided with a means for generating a reset signal when the battery 5 is replaced, and such a configuration is adopted. Thus, the object of the present invention has been achieved by solving the problems of the conventional example described above.

[0005]

According to the present invention having the above-described structure, the control unit 4 is provided with a means for generating a reset signal when the battery 5 is replaced, so that the charge of the control device remains. Even if the battery 5 is replaced while the battery is in the reset state, the reset is performed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. The water supply control device of the present invention is used for controlling various water supply devices such as urinals, hand washers, wash basins, and sinks. That is, as the water supply control means used for these, for example, there is an automatic faucet. 3 and 4
As shown in the figure, an automatic faucet as a water supply control device is composed of a flusher, an optical sensor having a light emitting element and a light receiving element, and a human body sensing device 2 which senses a human body by an optical sensor and outputs a sensing signal, and Control unit 4 that outputs an open / close signal to water supply unit 3 based on the input of a sensing signal from human body sensing device 2
And a water supply unit 3 that opens and closes a valve in response to input of an open / close signal from the control unit 4, and further includes a battery 5 as a power source. The hand washing machine is provided with a human body sensing device 2. The control unit 4 and the battery 5 are incorporated in the human body sensing device 2 and a control box 7 incorporated in the hand washing machine, and the control box 7 is connected to the control box 7 by a signal line 9. is there. Note that FIG.
Shows a state in which the battery cover 8 is slid by half and opened. Reference numeral 3 denotes a water supply unit which is constituted by an electromagnetic valve and is connected to the control box 7 by a signal line 9. An opening / closing signal is output from the control unit 4 in response to the input of the sensing signal from the human body sensing device 2, and the opening and closing of the solenoid valve of the water supply unit 3 is controlled. Or stop water spouting.

FIG. 1 shows a block diagram of the present invention, and FIG. 2 shows an example of a circuit for detecting the presence or absence of a battery 5. In FIGS. 1 and 2, reference numeral 4 a denotes a C constituting the control unit 4.
PU, 4b is a stabilization circuit, 4c is a transistor, 4d is a detection circuit, 4e is a reset circuit, 4f is a capacitor,
Denotes a battery, and 10 denotes a drive circuit for driving the water supply unit 3 to open and close. Here, the capacitor 4f is for reducing the voltage fluctuation due to the change of the load current.
Are connected in parallel with each other, and power is supplied to the reset circuit 4e and the CPU by the stabilizing circuit 4b. By the way, this device is driven by the battery 5, and the battery is replaced when the voltage drops. However, there is a case where the CPU is not reset when the battery is replaced with the electric charge remaining in the capacitor 4f. Thus, in the present invention, as shown in FIG. 2, a detection circuit 4d for detecting the presence or absence of the battery 5 and controlling the reset circuit 4e is provided so that the CPU is reset when the battery is replaced. There are features. That is, the battery 5 uses four AA alkaline batteries,
As shown in FIG. 2, the reset circuit 4e is released by turning on the transistor 4c with the intermediate voltage of four AA alkaline batteries, and the CPU is reset by the voltage after the stabilization circuit 4b. Here, when the battery 5 is removed to replace the battery 5, the transistor 4c is turned off regardless of the charge accumulation of the capacitor 4a. Then, when the battery 5 is attached, the transistor 4c is turned on again to reset the reset circuit 4e, and the CPU uses the voltage after the stabilization circuit 4b immediately after the battery 5 is attached regardless of the voltage immediately before the battery 5 is attached. Is reset.

[0008]

According to the present invention, as described above, the control unit is provided with a means for generating a reset signal when the battery is replaced, so that the battery is replaced while the control device remains charged. Can reliably reset the CPU and prevent malfunction of the apparatus. In addition, a special structure (for example, a short-circuit structure for discharging electric charges) in the battery fitting or the spring portion is used. Can be reset without the need to use

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a circuit diagram of the same.

FIG. 3 is a front view showing a relationship among a control unit, a human body sensing device, and an electromagnetic valve according to the first embodiment.

FIG. 4 is a side view in which a part of the control unit is determined.

[Explanation of symbols]

 2 Human body sensing device 3 Water supply unit 4 Control unit 5 Battery

Continuation of front page (56) References JP-A-60-13132 (JP, A) JP-A-62-160335 (JP, A) JP-A-62-280431 (JP, A) JP-A-63-14934 (JP) , A) (58) Field surveyed (Int. Cl. ⁶ , DB name) E03D 5/10 E03C 1/05

Claims (1)

(57) [Claims] 1. A human body sensing device comprising a water washing machine, an optical sensor having a light emitting element and a light receiving element, and sensing a human body by the optical sensor to output a sensing signal, and inputting a sensing signal from the human body sensing device. A water supply unit that outputs an open / close signal to the water supply unit based on the input / output of the open / close signal from the control unit, and a water supply unit that opens and closes a valve. A water supply control device, characterized by comprising means for generating a reset signal in the section.