JPH1199086A - Motor control circuit for liquid detergent ejecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the wasteful use of a liquid detergent in a liquid detergent ejecting device. SOLUTION: A motor control circuit for the liquid detergent ejecting device is provided with a light emitting element 10 irradiating light toward a hand ejecting the liquid detergent, a light receiving element 11 receiving reflected light obtained by reflecting the light of this element 10 by the hand, a storing circuit 13 outputting a liquid detergent ejecting signal when the output of the element 11 is inputted to input the reflected light for prescribed period, and a switching circuit 14 revolving a motor 1 driving a pump when the ejecting signal is outputted by being switched by the ejecting signal of the circuit 13. In addition, the motor control circuit is provided with a forcing off timer circuit 15 preventing the revolution of the motor 1 for a fixed period after the circuit 14 revolves and stops the motor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor control circuit for an apparatus for dispensing a liquid detergent which is mainly used in a washroom and is used for supplying a liquid detergent to hands.

[0002]

2. Description of the Related Art A device has been developed in which when a hand is put out, the hand is detected by light and a motor drives a pump, and the pump discharges a liquid detergent from a nozzle toward the hand. This device includes a circuit for detecting that the hand has been extended and rotating the motor. When the hand is put out, the motor is rotated, and the rotating motor drives the pump, the pump sucks the liquid detergent stored in the detergent container and sprays it from the nozzle toward the hand. Since this device automatically discharges the liquid detergent when the hand is put out, it can be conveniently installed in a washroom or the like.

A control circuit for detecting that the hand has been inserted and rotating the motor includes a light-emitting element for emitting a light beam toward the hand, and a light-receiving element for receiving light reflected from the hand of the light-emitting element. Is provided. When the hand is put out and the light of the light emitting element is reflected by the hand, the light is received by the light receiving element. The output signal of the light receiving element is amplified, and when the hand is out, the motor is rotated.

[0004]

In this control circuit, when a hand is put out, a motor drives a pump to eject a liquid detergent from a nozzle. For this reason, the liquid detergent is automatically sprayed without operating a switch or the like, and can be used extremely conveniently. In particular, since an unspecified number of users can spray liquid detergent without touching their hands, it is extremely hygienic,
It has the feature that hands can be cleaned cleanly with a liquid detergent.

[0005] However, in this control circuit, the liquid detergent is ejected every time the hand is put out, so that a large amount of the liquid detergent may be used unnecessarily or by a careless user. In particular, restaurants, canteens,
A discharge device used for business purposes in a place used by an unspecified number of people, such as a hospital, a hotel, a washroom in a parking area on a highway, or the like, has a disadvantage that it is easily used in such a state. Furthermore, when used in such a state,
There is a drawback that the liquid detergent runs out in a short time and can be used normally. The discharge device used by an unspecified number of people replenishes the liquid detergent for a certain period of time. However, if a large amount of liquid detergent is discharged due to mischief or the like, the liquid detergent runs out in a very short time. .

[0006] The present invention has been developed with a view to solving such a drawback. An important object of the present invention is to provide a motor control circuit of a device for discharging a liquid detergent, which can prevent useless use of the liquid detergent.

[0007]

The motor control circuit of the apparatus for discharging a liquid detergent according to the present invention includes a light emitting element 10 for irradiating light toward a hand for ejecting the liquid detergent, and a light for emitting light from the light emitting element 10. Light-receiving element 1 that receives the reflected light reflected by
1, a storage circuit 13 for outputting a liquid detergent discharge signal when the output of the light receiving element 11 is input and the reflected light is input for a predetermined time, and the discharge signal is switched by the discharge signal of the storage circuit 13 so that the discharge signal is output. And a switching circuit 14 for rotating the motor 1 for driving the pump 5 when output.

Further, this motor control circuit has a forced off timer circuit 15 for prohibiting the rotation of the motor 1 for a certain time after the motor 1 is rotated by the switching circuit 14 and stopped, and the liquid detergent is jetted. After that, the liquid detergent is not sprayed for a certain period of time.

According to a second aspect of the present invention, there is provided a motor control circuit comprising:
The set time for forcibly stopping the rotation of the motor 1 by the forced off timer circuit 15 is set to be longer as the battery voltage for driving the motor 1 becomes lower.

Further, in the motor control circuit according to the third aspect of the present invention, the storage circuit 13 outputs a first discharge signal based on a signal from the light receiving element 11 and a first storage circuit 13A. A second storage circuit 13B that outputs a discharge signal with a delay. When both the first storage circuit 13A and the second storage circuit 13B output the ejection signal, the switching circuit 14 rotates the motor 1.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below illustrates a motor control circuit of a device for discharging a liquid detergent for embodying the technical idea of the present invention, and the present invention specifies the motor control circuit as follows. do not do.

Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as "claims" and "claims". In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments.

The motor control circuit of the present invention is built in a liquid detergent discharge device shown in the sectional view of FIG.
To control the rotation of The discharge device of FIG. 1 is a post-installation type discharge device that is not built in a washstand or the like, and sucks a detergent container 3 and a liquid detergent stored in the detergent container 3 into a plastic case 2 and discharges the same through a nozzle 4. Pump 5
And a motor 1 for driving the pump 5 and a motor 1
And a motor control circuit for controlling the rotation of the motor 1.

The motor control circuit detects the hand when the hand is inserted below the nozzle 4 and rotates the motor 1. The motor 1 drives the pump 5 to discharge the liquid detergent in the detergent container 3 from the nozzle 4. The pump 5 shown in FIG.
The revolving motor 1 reciprocates the bellows-like container 7, and reciprocates the lower end of the bellows-like container 7 to discharge the liquid detergent from the nozzle 4. The bellows-like container 7 has a check valve connected to the suction side and the discharge side. The check valve on the suction side is connected to the detergent container 3, and the check valve on the discharge side is connected to the nozzle 4. The check valve is connected to transfer the liquid detergent from the detergent container 3 to the bellows-like container 7 and from the bellows-like container 7 to the nozzle 4.
When the bellows-like container 7 is reciprocated by the rotating motor 1, the pump 5 sucks the liquid detergent in the detergent container 3 and discharges the liquid detergent from the nozzle 4. The motor 1 has an eccentric cam 8
Then, the lower end of the bellows-like container 7 is reciprocated via the slider 9.

[0015] The motor control circuit is a motor 1
Is rotated to discharge a fixed amount of liquid detergent and then stopped.
In addition, after the motor control circuit discharges the liquid detergent,
A built-in circuit for forcibly stopping the discharge of the liquid detergent for a certain period of time. This is to prevent the liquid detergent from being discharged many times continuously due to mischief or the like.

FIG. 2 is a block diagram of the motor control circuit.
FIG. 3 shows a circuit diagram. The motor control circuit shown in these figures includes a light emitting element 10 that irradiates light toward a hand that injects a liquid detergent, and a light receiving element 11 that receives light reflected by the light of the light emitting element 10 by hand. An amplifier circuit 12 for amplifying the output of the light receiving element 11, a storage circuit 13 for outputting a liquid detergent discharge signal when the output of the amplifier circuit 12 is input and reflected light is input for a predetermined time, and a storage circuit 13
A switching circuit 14 for switching the motor 1 for driving the pump when the discharge signal is output, and the switching circuit 14
Is provided with a forced off timer circuit 15 for prohibiting the rotation of the motor 1 for a predetermined time after the motor 1 is rotated and stopped.

As shown in the bottom view of FIG. 4, the light emitting element 10 and the light receiving element 11 are arranged on both sides of the nozzle 4 and face downward. In the illustrated motor control circuit, the light emitting element 10 is an LED, and the light receiving element 11 is a photodiode. As the light emitting element, any element that emits electricity, for example, a light bulb, can be used instead of the LED. An LED is a light-emitting element that is suitable for blinking at a constant cycle because of a short response time and a long life. As the light receiving element, a phototransistor can be used instead of the photodiode.

The light emitting element 10 and the light receiving element 11 form a pair, and are disposed at positions where the light beam emitted from the light emitting element 10 is reflected by hand and received by the light receiving element 11.

Further, the motor control circuit shown in the figure does not continuously light the light emitting element 10. The light emitting element 10
Flashes and turns on. In order to make the light emitting element 10 blink, the motor control circuit includes the oscillation circuit 16 and the oscillation circuit 1.
Power supply switch circuit 1 switched by the output of the power supply 6
7 is provided. The oscillation circuit 16 oscillates a rectangular wave having a constant period. The rectangular wave of the oscillation circuit 16 is supplied to the power supply switch circuit 17. The power supply switch circuit 17 is turned on and off by a rectangular wave input from the oscillation circuit 16 and lights the light emitting element 10 intermittently.

The power supply switch circuit 17 includes the light emitting element 1
In addition to 0, power is also supplied to the amplifier circuit 12 and the storage circuit 13. The amplifier circuit 12 and the storage circuit 13 to which power is supplied from the power supply switch circuit 17 do not continuously consume power, but are supplied with power intermittently. As described above, the motor control circuit that supplies power to the light emitting element 10, the amplifier circuit 12, and the storage circuit 13 via the power supply switch circuit 17 can reduce average power consumption. Therefore, the consumption time of the battery 6 can be reduced, and the replacement time of the battery 6 can be extended. The light emitting element 10, the amplifier circuit 12, and the storage circuit 13
They are operated together in synchronization with each other to amplify and process the output of the light receiving element 11.

The amplifier circuit 12 amplifies the output of the light receiving element 11 and inputs the amplified output to the storage circuit 13. The accumulation circuit 13 accumulates the “H” signal input from the amplification circuit 12 and outputs an ejection signal. The storage circuit 13 shown in the figure is provided with a first storage circuit 13A in order to more accurately detect that the hand is out.
And a second storage circuit 13B. The output of the first storage circuit 13A is delayed via the delay circuit 13C to the second storage circuit 1A.
3B. This storage circuit 13 can prevent malfunction due to external noise or external light. This is because when both the first storage circuit 13A and the second storage circuit 13B output the ejection signal, the switching circuit 14 is turned on to rotate the motor 1.

The "H" signal from the amplifier circuit 12 is first input to the first storage circuit 13A. Therefore, the first storage circuit 13A first outputs the ejection signal. The ejection signal of the first storage circuit 13A is input to the second storage circuit 13B with a delay. Therefore, the second storage circuit 13B outputs the ejection signal later than the first storage circuit 13A. When the hand is continuously extended, the first storage circuit 13
A continuously outputs the ejection signal. Therefore, the ejection signal is output from both the first storage circuit 13A and the second storage circuit 13B. However, when a temporary pulse-like "H" signal is input to the storage circuit 13 due to noise or external light, the first storage circuit 13A first outputs a discharge signal, and this output is used to output the second storage circuit 13B. Also outputs the ejection signal, but when the second accumulation circuit 13B outputs the ejection signal, the first accumulation circuit 1
3A does not output the ejection signal. For this reason, even if the “H” signal is momentarily input from the amplifier circuit 12, both the first storage circuit 13A and the second storage circuit 13B do not output the ejection signal together. In a state where the reflected light of the hand is input to the light receiving element 11, the amplifier circuit 12 inputs the "H" signal to the storage circuit 13 for a certain period of time, so that the storage circuit 13 includes the first storage circuit 13A and the second storage circuit. 13B output ejection signals. Therefore, the storage circuit 13 accurately detects that the hand has been extended, and the storage circuit 13 outputs the ejection signal to the switching circuit 1.
4 is output.

The switching circuit 14 includes a switching element Q1 connected in series to the motor 1, and a driver connected to the input side of the switching element Q1 to switch the switching element Q1 on and off by a discharge signal. The driver includes an input transistor Q2 to which the ejection signal is input, and a buffer transistor Q3 which is turned on / off by the input transistor Q2.

The input transistor Q2 has its input side base connected to the output side of the first storage circuit 13A and the output side of the second storage circuit 13B via diodes D1 and D2.
The buffer transistor Q3 has its input side base connected to the output side emitter of the input transistor Q2. Furthermore, the buffer transistor Q3
Connects the collector on the output side to the base on the input side of the switching element Q1.

The switching element Q1 is connected to the manual switch 18 in parallel. The manual switch 18 forcibly rotates the motor 1 when pressed and turned on. The manual switch 18 is pressed when the detergent container is replaced or when the detergent container is refilled with the liquid detergent, and the motor 1 is forcibly rotated. When replacing the detergent container or refilling the liquid detergent,
This is for discharging the air that has entered the liquid detergent transfer path.
When air enters the transfer path of the liquid detergent, the liquid detergent is not discharged even if the motor 1 is rotated. The motor 1 is forcibly rotated to discharge the air in the liquid detergent transfer path so that the liquid detergent is always discharged when the motor 1 is rotated with the hand out.

Further, the motor control circuit of FIG. 3 includes a limit switch 1 in parallel with the buffer transistor Q3.
9 is connected. The limit switch 19 stops the rotation of the motor 1 when the pump discharges a fixed amount of the liquid detergent. The limit switch 19 detects that the bellows-shaped container, which is a pump, has reciprocated once, and
Stop the rotation of. When the lower end of the bellows-like container moves to the bottom dead center, the limit switch 19 is turned off by pressing the plunger. The plunger of the limit switch 19 is pushed by a stopper arm provided on a cam shaft for reciprocating the bellows-like container.
Although not shown, the stopper arm is fixed to the rear end of the cam shaft. The limit switch is provided at a position where the plunger is pushed by the stopper arm when the bellows-like container moves to the bottom dead center. The limit switch is turned off when the plunger is pushed by the stopper arm, and is turned on when the plunger is not pushed.

The above motor control circuit stops the rotation of the motor 1 by detecting the rotation position of the camshaft by the limit switch 19, and is stopped after the pump 5 discharges a fixed amount of liquid detergent. In other words, when the hand is taken out, a constant amount of liquid detergent is always supplied from the pump 5 to the nozzle 4.
Is discharged from The motor control circuit of the present invention does not specify the structure for stopping the pump 5 as the limit switch 19. For example, the rotation time of the pump may be controlled by a timer, and the pump may be rotated for a set time of the timer without using a limit switch.

The forcible off timer circuit 15 includes a motor 1
After the rotation of the motor 1 is stopped, the counting is started and the rotation of the motor 1 is forcibly stopped for a set time. The forced off timer circuit 15 of FIG. 3 includes a short-circuit transistor Q4 that connects the output side of the storage circuit 13 to the ground and cancels the ejection signal, and a timing capacitor C that specifies the "L" set time. Forced off timer circuit 15
Short-circuits the "H" signal, which is the discharge signal of the storage circuit 13, to ground when the short-circuit transistor Q4 is on,
This prevents the switching element Q1 from turning on.

When the motor 1 is rotating, the forcible off timer circuit 15 controls the timing capacitor C
Is discharged via the diode D3. This is because the limit switch 19 in the ON state connects the + terminal of the timing capacitor C to the ground via the diode D3. When the charge of the timing capacitor C is discharged and the potential at both ends is 0 V, the short-circuit transistor Q4 is turned on. Short-circuit transistor Q4
Is the same as the collector potential. When a discharge signal is output from the storage circuit 13 in this state, the discharge signal is short-circuited to ground by the short-circuit transistor Q4, and is not output to the switching circuit 14. The ejection signal which is the "H" signal is connected to the short-circuit transistor Q
4 is short-circuited to 0V.

The timing condenser C is connected to the motor 1
After the rotation of is stopped, the battery is gradually charged and the voltage on the + side rises. When the voltage of the timing capacitor C increases, the base potential of the short-circuit transistor Q4 increases to the emitter potential, and the short-circuit transistor Q4 is turned off. Therefore, the short-circuit transistor Q4
Keeps the ON state until the timing capacitor C is charged to a predetermined voltage, during which the ejection signal of the storage circuit 13 is canceled.

After the rotation of the motor 1 is stopped, the timing capacitor C is gradually charged because the limit switch 19 and the buffer transistor Q3 are turned off, and the + terminal of the timing capacitor C is not short-circuited to the ground. , + Side terminal is the switching element Q
This is because it is connected to the + side of the power supply via the transistor which is 1. In this state, the + side of the timing capacitor C is a transistor that is the switching element Q1, a base resistor R1 of the transistor,
It is connected to the + side of the power supply via a timing resistor R2 connected in parallel with the diode D3. Therefore, after the rotation of the motor 1 is stopped, the timing capacitor C is charged through the base resistor R1 and the timing resistor R2.

The time required for the voltage of the timing capacitor C to rise to a predetermined voltage is determined by the capacitance of the timing capacitor C, the product of the resistance value obtained by adding the resistances of the base resistor R1 and the timing resistor R2, and the charging voltage. It is determined. In an actual circuit, the resistance value of the timing resistor R2 is designed to be considerably larger than that of the base resistor R1. Therefore, the voltage rise time of the timing capacitor C is determined by the product of the capacitance of the timing capacitor C, the resistance value of the timing resistor R2, and the charging voltage. When the capacitance is large, the resistance value is large, and the charging voltage is low, the time required for the voltage of the timing capacitor C to rise to a predetermined value after the rotation of the motor 1 is stopped becomes long. Therefore, when the capacitance of the timing capacitor C is increased, the resistance value of the timing resistor R2 is increased, and the charging voltage is decreased, the forced off timer circuit 15 causes the time during which the rotation of the motor 1 is forcibly stopped. Becomes longer. This is because the time during which the short-circuit transistor Q4 is switched from ON to OFF becomes longer.

The forced off timer circuit 15 shown in the figure charges the timing capacitor C with an unstabilized battery voltage. This is because the switching element Q1 is directly connected to the battery 6. The battery voltage decreases as the discharge proceeds. For this reason, the forced off timer circuit 15 has a longer time for forcibly stopping the rotation of the motor 1 as the battery voltage for driving the motor 1 becomes lower.

The motor control circuit shown in FIGS. 2 and 3 controls the rotation of the motor as follows, and discharges the liquid detergent when the hand is put out. When the hand is put out, the light emitted from the light emitting element 10 is reflected by the hand and received by the light receiving element 11. When the hand is not extended, the light emitted from the light emitting element 10 is:
The reflected light of the hand is not received by the light receiving element 11 without being reflected by the hand. The motor control circuit shown in the figure operates the light emitting element 10 and the light receiving element 11 in synchronization, so that when light is emitted from the light emitting element 10, the light receiving element 11 is in a state capable of receiving reflected light. It receives the reflected light and outputs a signal when the light is received.

When the light receiving element 11 receives the reflected light of the hand, the signal is amplified by the amplifier circuit 12 and input to the storage circuit 13 as an “H” signal. The storage circuit 13 is also operated in synchronization with the light emitting element 10 and the light receiving element 11.
The first "" input from the amplifier circuit 12 to the storage circuit 13 "
The H "signal is input to the first storage circuit 13A. The first storage circuit 13A outputs a discharge signal with the" H "signal input from the amplifier circuit 12. The discharge output from the first storage circuit 13A. The signal is delayed and input to the second storage circuit 13 B. The second storage circuit 13 B to which the ejection signal is input
Outputs an ejection signal. The second storage circuit 13B includes a first storage circuit 13B.
Since the ejection signal is output by delaying the ejection signal input from the storage circuit 13A, the ejection signal is output later than the first accumulation circuit 13A. When the light receiving element 11 continuously receives the reflected light of the hand, the amplifier circuit 12 continuously outputs “H”.
Output a signal. However, when the amplifier circuit 12 temporarily outputs the “H” signal due to other noises or the like, when the first storage circuit 13A outputs the ejection signal, the second storage circuit 13
When B does not output the ejection signal and the second storage circuit 13B outputs the ejection signal, the first storage circuit 13A does not output the ejection signal. Therefore, when the hand is extended and the light receiving element 11 continuously receives the reflected light of the hand, both the first accumulation circuit 13A and the second accumulation circuit 13B output the ejection signal.

The first storage circuit 13 A and the second storage circuit 1
When the ejection signal is output from both the 3Bs, the signal is input to the switching circuit 14. At this time, if the forced off timer circuit 15 is in a state in which the output of the storage circuit 13 is short-circuited and is not canceled, the discharge signal of the storage circuit 13 is input to the switching circuit 14.

When the ejection signal is input to the switching circuit 14, the switching element Q 1 of the switching circuit 14 is temporarily turned on, and the rotation of the motor 1 is started. When the motor 1 rotates, the cam shaft is rotated, the stopper arm does not press the plunger of the limit switch 19, and the limit switch 19 is switched from off to on. When the limit switch 19 is turned on, the motor 1 rotates continuously even if the switching element Q1 of the switching circuit 14 is turned off. The rotating motor 1 drives the pump 5 to discharge the liquid detergent.

The motor 1 rotates the camshaft once,
When the stopper arm of the cam shaft pushes the plunger of the limit switch 19, the limit switch 19 is switched from on to off. When the limit switch 19 is turned off, the switching transistor Q1 is turned off because the buffer transistor Q3 is already turned off. The reason that the buffer transistor Q3 is off is
This is because the storage circuit 13 is in a state of not outputting the ejection signal.

When the motor 1 is rotating, the limit switch 19 discharges the timing capacitor C of the forced off timer circuit 15 to set the potential at both ends to 0V. When both the limit switch 19 and the buffer transistor Q3 are turned off and the rotation of the motor 1 is stopped, the timing capacitor C is gradually charged via the switching element Q1, the base resistor R1, and the timing resistor R2.

Before the timing capacitor C is charged and reaches a predetermined voltage, a hand is put out and the first storage circuit 13 A and the second storage circuit 13
When the ejection signal is output from B, the output is short-circuited to ground by the short-circuit transistor Q4 of the forced off timer circuit 15. This is because the short-circuit transistor Q4 of the forced off timer circuit 15 is in the ON state. The ejection signal, which is an “H” signal, output from the storage circuit 13 is 0
V and does not switch the switching circuit 14 on.

When a certain period of time elapses after the rotation of the motor 1 is stopped and the timing capacitor C is raised to a predetermined voltage, the short-circuit transistor Q4 of the forced off timer circuit 15 is switched from on to off. In this state, when the ejection signal is output from the storage circuit 13,
The switching circuit 14 rotates the motor 1 by the discharge signal without being short-circuited to the ground by the short-circuit transistor Q4.

Therefore, the motor control circuit described above
After the motor 1 is stopped, the forced off timer circuit 1
When the short-circuit transistor Q4 of No. 5 is on,
Even if you extend your hand, the switching circuit 14
Is not rotated, and it is possible to reliably prevent the pump 5 from continuously discharging the liquid detergent.

[0043]

The motor control circuit of the apparatus for discharging a liquid detergent according to the present invention has a feature that wasteful use of the liquid detergent can be prevented. It is a light emitting element in which the motor control circuit of the present invention irradiates light toward a hand for spraying a liquid detergent,
A light receiving element for receiving the reflected light of the light emitting element; a storage circuit for outputting a liquid detergent discharge signal when the reflected light is input to the light receiving element for a predetermined time; A switching circuit that rotates a motor that drives the pump when is output,
This is because there is a forced off timer circuit that prohibits rotation of the motor for a certain time after the motor is stopped by rotating the motor with the switching circuit. This forced off timer circuit is configured not to spray the liquid detergent for a certain period of time after the liquid detergent is sprayed, and during this time, even if the hand is put out, the pump continuously sprays the liquid detergent. Is surely blocked. Therefore, in the motor control circuit of the present invention, the liquid detergent is not sprayed every time the hand is put out, and the liquid detergent is not used in a large amount unnecessarily or by a careless user. Therefore, even if it is installed in a place where an unspecified number of people use it, it is possible to effectively prevent the liquid detergent from being wasted, and it is extremely convenient.
Moreover, there is a feature that can be used efficiently.

A motor control circuit according to a second aspect of the present invention
The feature is that it is very easy to know when to replace the battery.
That is, this motor control circuit sets the time to forcibly stop the rotation of the motor with the forced off timer circuit,
This is because the setting is made such that the longer the battery voltage for driving the motor becomes, the longer the battery voltage becomes. Therefore, when the set time for forcibly stopping the rotation of the motor becomes long, the control circuit recognizes that the battery voltage has dropped, and can replace the battery with a new one.

Further, according to a third aspect of the present invention, in the motor control circuit, the storage circuit includes a first storage circuit that first outputs a discharge signal based on a signal from the light receiving element, and a discharge signal that lags behind the first storage circuit. And a second storage circuit for outputting the same.
Therefore, this motor control circuit has a feature that the device can be reliably prevented from malfunctioning due to external noise or external light. This is because the switching circuit rotates the motor when both the first storage circuit and the second storage circuit of the storage circuit output the ejection signal. As described above, the motor control circuit capable of preventing the malfunction of the apparatus has a feature that wasteful consumption of the liquid detergent is extremely reduced and the liquid detergent can be used safely for a long time.

[Brief description of the drawings]

FIG. 1 is a sectional view of an apparatus for discharging a liquid detergent according to an embodiment of the present invention.

FIG. 2 is a block diagram of a motor control circuit of the apparatus for discharging a liquid detergent according to the embodiment of the present invention.

FIG. 3 is a circuit diagram of a motor control circuit of the apparatus for discharging a liquid detergent according to the embodiment of the present invention.

FIG. 4 is a bottom view of an apparatus for discharging a liquid detergent according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Motor 2 ... Case 3 ... Detergent container 4 ... Nozzle 5 ... Pump 6 ... Battery 7 ... Bellows-like container 8 ... Eccentric cam 9 ... Slider 10 ... Light emitting element 11 ... Light receiving element 12 ... Amplifying circuit 13 ... Storage circuit 13A ... First storage circuit
13B: second storage circuit 13C: delay circuit 14: switching circuit 15: forced off timer circuit 16: oscillation circuit 17: power supply switch circuit 18: manual switch 19: limit switch Q1: switching element Q2: input transistor Q3: buffer transistor Q4: Short-circuit transistor C: Timing capacitor R1: Base resistance R2: Timing resistance

Claims (3)

[Claims] 1. A light emitting element (10) for irradiating light toward a hand for injecting a liquid detergent, and a light receiving element (11) for receiving light reflected from the light of the light emitting element (10) by hand. , Light receiving element (1
A storage circuit (13) that outputs a liquid detergent discharge signal when the output of 1) is input and reflected light is input for a predetermined time, and the discharge signal is switched by the discharge signal of the storage circuit (13). A switching circuit (14) for rotating a motor (1) for driving a pump (5) when output; a motor control circuit of a device for discharging a liquid detergent, wherein the switching circuit (14) controls the motor (1). A motor control circuit for a device for discharging a liquid detergent, comprising a forced off timer circuit (15) for prohibiting rotation of a motor (1) for a predetermined time after being stopped by rotation. 2. A forced off timer circuit (15) includes a motor.
The set time for forcibly stopping the rotation of (1) is
The motor control circuit for a device for discharging a liquid detergent according to claim 1, wherein the setting is made longer as the battery voltage for driving (1) becomes lower. 3. A first storage circuit (13A) that first outputs a discharge signal based on a signal from a light receiving element (11), and a discharge signal is delayed later than the first storage circuit (13A). And a second storage circuit (13B) for outputting a discharge signal. When both the first storage circuit (13A) and the second storage circuit (13B) output a discharge signal, the switching circuit (14) operates the motor (1). The motor control circuit of the apparatus for discharging a liquid detergent according to claim 1, wherein the motor control circuit is configured to rotate the liquid detergent.