JPH0646060U - Automatic faucet device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an automatic faucet device that is easy to install, can adjust the amount of water, and that what is added around the faucet does not interfere with use. [Structure] A case that can be attached to the upper part of a faucet of water supply, detection means 34 and 1 housed in the case for detecting at least a part of a human body, and a case that is housed in the case to open and close an opening / closing valve of the faucet The motor 22 for rotating the open / close valve shaft and the motor 22 housed in the case, based on the result of the detection means 34, 1 detecting at least a part of the human body.
And a control circuit for controlling the rotation of the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic faucet device that automatically opens and closes a faucet in an existing faucet such as a bathroom, kitchen, or public toilet in a general household.

[0002]

[Prior art]

 Conventionally, there are some systems that automatically perform water discharge or water stoppage from a tap using a sensor. For example, you can remove the entire faucet and replace it with an automatic faucet device with a built-in sensor, or loosen the packing nut at the faucet part and replace it with an opening / closing valve that is driven by a solenoid valve or a motor. There was a method by which an automatic faucet device was attached by retrofitting.

However, whichever method is used, it is not possible to continuously adjust the amount of water discharged from the faucet.

Further, in the method of removing the entire faucet and replacing the faucet with an automatic faucet device, the main tap of the water supply must be closed at the time of installation work, which is difficult for ordinary people to work. Especially in multi-family houses, it is often impossible to work because the location of the main plug is unknown. There is a problem in public toilets that if all main taps are stopped, all faucets cannot be used. In addition, this system was expensive because it replaced everything with a new device.

Even in the case of the method of removing the packing nut of the faucet part and replacing it with an opening / closing valve driven by a solenoid valve or a motor, it is necessary to close the main tap of the water supply at the time of installation as well, which causes a problem in workability.

In the case of a system in which the device is retrofitted to the tip of the faucet, it is not necessary to close the main plug of the waterway at the time of mounting. However, because a device that did not exist before is added to the tip of the faucet, the gap between the sink and the faucet becomes narrow, which makes it difficult to use. In addition, there was a problem that the amount of water was reduced by adding the device.

[0007]

[Problems to be solved by the device]

 As described above, the conventional automatic faucet device has a problem that it is impossible to automatically adjust the amount of water, the work at the time of installation is difficult, or the newly added device interferes with the use. was there.

The present invention has been made in view of the above circumstances, and can be easily installed by a general person, the amount of water can be adjusted, and the one added around the faucet does not interfere with use. An object is to provide a faucet device.

[0009]

[Means for Solving the Problems]

 The automatic faucet device of the present invention includes an attaching means that can be attached to an upper part of a faucet, a detecting means that is held by the attaching means, detects at least a part of a human body, and is held by the attaching means. A motor for rotating the opening / closing valve of the faucet part, and a control circuit which is held by the mounting means and controls the rotation of the motor based on the result of the detection means detecting at least a part of the human body are provided. .

Here, the control circuit may rotate the motor in a reverse direction so as to close the opening / closing valve when energized.

Further, the control circuit has a current detection means for detecting a current flowing through the motor, and stops the rotation of the motor when the current detected by the current detection means exceeds a predetermined value. May be

Further, the control circuit may rotate the motor in a reverse direction when the power supply voltage becomes equal to or lower than a predetermined voltage.

Further, the automatic faucet device further includes a cam connected to the shaft of the opening / closing valve, and a switch that switches the opening / closing state when the cam rotates by a predetermined angle, and the control circuit is configured to detect the detection signal. When at least a part of the human body is detected by the means, the motor is rotated in the forward direction, and when the cam rotates by the predetermined angle and the switch operates, the motor is stopped, and after a predetermined time elapses. The motor may be rotated in the opposite direction.

The predetermined angle may be arbitrarily set within a range of 360 degrees.

In the control circuit, while at least a part of the human body is continuously detected by the detecting means, the motor rotates in the positive direction, the cam rotates by the predetermined angle, and the switch operates. Even after the operation, the motor may be controlled to continue rotating in the forward direction until at least a part of the human body is not detected.

Alternatively, the control circuit detects at least a part of the human body by the detecting means, and detects the human body by the detecting means before the motor rotates in the forward direction and the cam rotates to the predetermined angle. When at least a part is detected again, the motor may be rotated in the reverse direction.

Further, the control circuit controls the motor to rotate in the forward direction when at least a part of the human body is detected by the detection means while the motor is rotating in the reverse direction. May be.

[0018]

[Action]

 By installing the device above the faucet of the water supply, the distance from the faucet to the sink does not become so small that it does not hinder the use, and it also controls the motor that detects at least a part of the human body and rotates the open / close valve. Then, it is possible to spout as much water as necessary.

When energized, the on-off valve is first closed to prevent wasteful water discharge.

By stopping the rotation of the motor when the current flowing through the motor exceeds a predetermined value, damage to the motor and waste of power can be prevented.

Even if the packing of the faucet becomes loose, it is possible to always stop the water with a constant force.

When the power supply voltage is equal to or lower than the predetermined voltage, by rotating the motor in the reverse direction and closing the on-off valve, it is possible to prevent the control circuit from malfunctioning and wasting water.

The cam connected to the on-off valve rotates to a predetermined angle at which the amount of water required for normal use is obtained, the switch operates, the rotation of the motor stops for a predetermined time, and then the motor rotates in the reverse direction. By closing the on-off valve, the desired amount of water can be easily obtained and at the same time the waste of water is prevented.

Since the angle of the cam when the switch operates can be arbitrarily set within the range of 360 degrees, the required amount of water can be easily adjusted.

While at least a part of the human body is continuously detected, the motor continues to rotate in the forward direction until at least a part of the human body is not detected even after the switch is operated, so that the amount of water can be reduced. It can be easily increased.

When the motor rotates in the forward direction, the cam rotates to a predetermined angle, and at least a part of the human body is detected again before the switch is operated, the motor is rotated in the reverse direction. Accordingly, water discharge can be stopped, and waste of water can be prevented.

When at least a part of the human body is detected while the motor is rotating in the reverse direction, the motor is rotated in the normal direction again, and water is discharged again without delay until the on-off valve is completely closed. You can

[0028]

【Example】

 Hereinafter, an automatic faucet device according to an embodiment of the present invention will be described with reference to the drawings. First, the internal structure of the automatic faucet device will be described with reference to the drawings showing a cross-section of the automatic faucet attached to an existing faucet. FIG. 4 is a longitudinal sectional view showing the state in which the present apparatus is attached to the upper part of the faucet, and FIG.

In the present automatic faucet device, a drive mechanism and a circuit are housed inside the main body surrounded by the main body lid 105 and the main body case 104. An open / close valve shaft 103 for rotating an open / close valve (not shown) is provided above the water faucet 101, and a currant (not shown) is also attached to the open / close valve shaft 103. An on-off valve drive shaft 106 that drives the on-off valve shaft 103 is attached to the upper part of the on-off valve shaft 103 by removing the currant. The motor 21 rotates the on-off valve drive shaft 106, and the rotation of the motor 21 is reduced by the gear 109 and transmitted to the on-off valve drive shaft 106. The rotation of the motor 21 is controlled by the electric circuit section 111 covered in the electric circuit cover 116. The electric circuit unit 111 controls the rotation of the motor 21 based on the operation of the sensor 113 detecting the hand of the user. Further, the motor 21, the electric circuit unit 111, and the sensor 113 are supplied with electric power by a battery 114 housed in the rear of the main body. A cam 107 for detecting the opening / closing degree of the on-off valve, that is, the rotation angle of the on-off valve shaft 103 is attached to the outer periphery above the on-off valve drive shaft 106. A cam portion protrusion 117 is provided at one location on the outer circumference of the cam 107, and the switch 112 is closed when the cam portion is rotated by a predetermined angle.

The schematic operation of such an apparatus will be described below. When the user brings his or her hand close to the sensor 113, the sensor 113 detects the hand and the information is transmitted to the electric circuit unit 111. The motor 21 rotates under the control of the electric circuit unit 111, and this rotation is decelerated by the gear 109 and transmitted to the on-off valve drive shaft 106. Since the open / close valve shaft 103 is provided with irregularities for preventing slippage, by making the inner surface of the open / close valve drive shaft 106 also irregular, the rotation of the open / close valve drive shaft 106 is prevented. It is transmitted to 03. As a result, an on-off valve (not shown) opens and water is discharged from the faucet.

A cam 107 is attached to the outer periphery of the on-off valve drive shaft 106 as described above. Here, a fine gear-shaped unevenness is engraved on the outer circumference of the on-off valve drive shaft 106, and an unevenness that meshes with the inner circumference of the cam 107 is formed. As a result, when the on-off valve drive shaft 106 rotates, the cam 107 also interlocks with it, and the position of the cam projection 117 moves. Here, the position of the cam projection 117 on the circumference of the cam 107 is as shown in FIG. 6, when the cam projection 117 is rotated in the D direction by a predetermined angle after the on-off valve is completely closed. Are set to close the switch 112. When the switch 112 is closed, the power supply to the motor 21 is cut off and the rotation is stopped, as will be described later. In this way, the cam projection 117 and the switch 112 are used to detect the open / close degree of the open / close valve. Here, by changing the relative positional relationship between the position of the cam projection 117 on the circumference of the cam 107 and the switch 112, the opening / closing degree of the open / close valve when the switch 112 operates can be arbitrarily set. Can

The work of attaching this device to the upper part of the water faucet 101 can be easily performed by ordinary people. It is sufficient to remove the cullan of the water faucet 101 and connect the on-off valve shaft 103 and the on-off valve drive shaft 106 that drives the on-off valve shaft 103 by the rotation of the motor 21 using the connecting screw 110. FIG. 5 shows a state in which the present apparatus is attached to the upper part of the water faucet 101. As is clear from this figure, since the present device removes and mounts the currant above the water faucet 101, there is no obstacle between the tip of the water faucet 101 and the sink, which does not hinder the use.

Next, FIG. 1 shows a circuit configuration of the electric circuit section 111 in the present apparatus. First, the main elements of this circuit will be described.

The pulse oscillator 38 generates a pulse signal, and the pulse signal is given to the infrared light emitting LED 34. The infrared light emitting LED 34 emits pulsed infrared light based on the timing of the pulse signal. This infrared ray is emitted for 60 microseconds, for example, once every 250 milliseconds.

When the user brings his hand close to the infrared emitting LED 34, infrared rays are reflected. The infrared light receiving phototransistor 1 receives the reflected infrared light. The infrared light received by the infrared phototransistor 1 is converted into an electric signal and then amplified by the amplifier circuit 2. The signal output from the amplifier circuit 2 is in the form of a digital signal. When this signal is input to the One Shot Multi 3, it is triggered and a high level signal is output. This output is, for example, for about 0.5 seconds when no signal is input to the one-shot multi 3, that is, infrared rays are continuously supplied for about 0. If it is not reflected for 5 seconds, it falls to low level. With this one-shot multi 3, even if the human hand is within the detectable range, the reflectance can be changed by a slight movement of the hand, and even if the reflection is momentarily interrupted, the hand can be reliably held. Presence can be detected and stable operation can be enabled.

The D-type flip-flop 4 outputs a positive output Q signal and a complementary output / Q signal, one of which is at a high level and the other of which is at a low level. The levels of the positive output Q signal and the complementary output / Q signal are inverted each time a human hand is detected and the one-shot multi 3 outputs a high level signal.

The motor rotation direction control circuit 21 controls the rotation direction by changing the direction of the current supplied to the motor 22 by the combination of the forward rotation input signal 30 and the reverse rotation input signal 31. When the forward rotation input signal 30 is at a high level and the reverse rotation input signal 31 is at a low level, the motor 22 rotates forward in the direction in which the on-off valve opens, and conversely the forward rotation input signal 30 is at a low level and the reverse rotation input signal 31 is In the case of high level, the motor 22 rotates in the reverse direction so that the on-off valve closes.

The initial reset circuit 26 outputs a high-level reset signal for closing the opening / closing valve once when the power is turned on. This reset signal is input to the reset terminal of the D-type flip-flop 4 via the OR circuits 36 and 6. The D-type flip-flop 4 to which the reset signal is input outputs a low level positive output Q signal and a high level complementary output / Q signal regardless of the output from the one-shot multi 3.

The voltage drop reset circuit 37 outputs a high level reset signal when the power supply voltage drops below a predetermined value. When this signal is output, it is input to the D-type flip-flop 4 via the OR circuits 36 and 6 and reset, and the low level positive output Q signal and the high level complementary output / Q signal are output.

The automatic faucet device operates so that the opening / closing valve is once closed when the power is first turned on. The initial reset circuit 26 detects that the power is turned on and outputs a high-level reset signal. This signal is input to the reset terminal of the D-type flip-flop 4 via the OR circuits 36 and 6. When the D-type flip-flop 4 is reset, it outputs a low-level positive output Q signal and a high-level complementary output Q signal regardless of the signal given from the one-shot multi 3. The low-level positive output Q signal is input to one input terminal of the OR circuit 17 via the AND circuits 8 and 16. A positive output Q signal is given from the D-type flip-flop 9 to the other input terminal of the OR circuit 17. Here, since the low-level positive output Q signal from the D-type flip-flop 4 is input to the clock terminal CL of the D-type flip-flop 9, the positive-output Q signal of the D-type flip-flop 9 is at the low level. Therefore, the low-level positive rotation input signal 30 is output from the OR circuit 17.

Further, the high-level complementary output / Q signal output from the D-type flip-flop 4 is input to the clock terminal CL of the D-type flip-flop 11, and the high-level reverse rotation input signal is input from this positive output Q terminal. 31 is output. As a result, the low-level forward rotation input signal 30 and the high-level reverse rotation input signal 31 are given to the motor rotation direction control circuit 21, and the motor 22 rotates in the reverse direction to close the open / close valve.

When the power supply voltage does not reach the predetermined level required for the normal operation of this device, the voltage drop reset circuit 37 outputs a high level reset signal. This reset signal is given to the OR circuit 36, and thereafter, the same operation as in the case where the reset signal is output from the initial reset circuit 26 described above is performed and the on-off valve is closed.

Next, the operation after the power is turned on will be described by dividing it into some operation modes. Further, FIG. 2 shows a temporal change in the rotation angle of the on-off valve shaft 103 for each operation mode. (1) Case A: When a person's hand is detected and the on-off valve is opened to a predetermined opening When the person's hand is momentarily detected when the on-off valve is fully closed, the reflected infrared light is received by the infrared light receiving photo. The light is received by the transistor 1. The signal output from the infrared light receiving phototransistor 1 is amplified by the amplifier circuit 2 and input to the one-shot multi 3. The one-shot multi 3 outputs a high-level output Q signal for about 0.5 seconds. This signal is given to one input terminal of the AND circuit 29. Further, the NAND circuit 28 receives the positive output Q signal of low level from the D-type flip-flop 20 and gives the output of high level to the other input terminal of the AND circuit 29. Therefore, a high level signal is output from the AND circuit 29 and applied to the clock terminal CL of the D-type flip-flop 4. As a result, the positive output Q signal of the D-type flip-flop 4 becomes high level and the complementary output / Q signal becomes low level.

The high-level positive output Q signal from the D-type flip-flop 4 is given to one input terminal of the AND circuit 8. A high-level signal from the one-shot multi 3 is input to the other input terminal of the AND circuit 8, and the AND circuit 8 outputs a high-level signal to the AND circuit 16. The other input terminal of the AND circuit 16 is supplied with a high level complementary output / Q terminal from the D-type flip-flop 15. Therefore, the AND circuit 16 outputs a high level signal to the OR circuit 17. As a result, a high level signal is output from the OR circuit 17, and this is input to the motor rotation direction control circuit 21 as the normal rotation input signal 30.

The high-level positive output Q signal from the D-type flip-flop 4 is input to one input terminal of the AND circuit 14. Further, a low level signal is input to the clock terminal CL of the D-type flip-flop 20 because the switch 112 is open, and a high level signal is output from the complementary output / Q terminal to cause the AND circuit 14 to operate. Is applied to the other input terminal of. As a result, a high level signal is output from the AND circuit 14 and input to the reset terminal of the D-type flip-flop 11 via the OR circuit 12. When the D flip-flop 11 is reset, a low-level signal is output as the reverse rotation input signal 31 from the positive output Q terminal. The high-level normal rotation input signal 30 and the low-level reverse rotation input signal 31 are input to the motor rotation direction control circuit 21, and the motor 22 rotates normally. This opens the on-off valve.

The rotation angle of the on-off valve shaft 103 in this case linearly increases with the passage of time, as shown as case A in FIG. In a general water faucet, the opening / closing valve shaft 103 makes two and a half rotations, that is, at 900 degrees. Further, the flow rate required for normal use can be obtained with the on-off valve shaft 103 rotating once (360 degrees). Therefore, here, it is assumed that the cam portion projection 117 is set to a positional relationship in which the switch 112 is pushed and closed when the on-off valve shaft 103 makes one rotation. When the switch 112 is closed, a high level signal is input to the clock terminal CL of the D-type flip-flop 20. Further, a high-level positive rotation input signal 30 is input to the data D terminal of the D-type flip-flop 20. As a result, the positive output Q signal of the D-type flip-flop 20 is at high level and the complementary output / Q signal is at low level. This high-level positive output Q signal is input to the reset terminal of the D-type flip-flop 9 via the OR circuit 10. When the D-type flip-flop 9 is reset, the positive output Q signal becomes low level and is input to the OR circuit 17. Further, a low-level signal is input from the one-shot multi 3 to the AND circuit 8, and this signal is input to the other input terminal of the OR circuit 17 via the AND circuits 8 and 16. As a result, the normal rotation input signal 30 output from the OR circuit 17 changes to the low level. One reverse rotation input signal 31 is at low level as described above. Therefore, both the forward rotation input signal 30 and the reverse rotation input signal 31 input to the motor circuit direction control circuit 21 become low level. As a result, the power supply to the motor 22 is cut off, the rotation of the on-off valve shaft 103 is stopped in the state of 360 degrees, and the water discharge is continued.

(2) Case B: When the on-off valve opens and stops up to 360 degrees and automatically closes after a predetermined time T has passed As described above, when the on-off valve shaft opens up to 360 degrees, the switch 112 is turned on. When closed, the forward rotation input signal 30 falls from the high level to the low level. When this low-level signal is input to the input terminal of the one-shot multi 7, it is triggered to output the low-level complementary output / Q signal for a predetermined time T. That is, the complementary output / Q signal is at a low level from the time t1 in FIG. 2 to a time t3 when a predetermined time T has elapsed, and becomes a high level after the time t3. This high level signal is input to the reset terminal of the D-type flip-flop 4 via the OR circuit 6. When the D-type flip-flop 4 is reset, the high-level complementary output / Q signal is input to the clock terminal CL of the D-type flip-flop 11, and the high-level reverse rotation input signal 31 is output from the positive output Q terminal. I will be forced. At the same time, the high level complementary output / Q signal from the D-type flip-flop 4 is also input to the reset terminal of the D-type flip-flop 9 via the OR circuit 10. As a result, the D-type flip-flop 9 is reset, and the low-level positive output Q signal is continuously output, and is supplied to the motor rotation direction control circuit 21 as the positive rotation input signal 30 via the OR circuit 17. The low-level forward rotation input signal 30 and the high-level reverse rotation input signal 31 are input to the motor rotation direction control circuit 21, and the motor 22 rotates in the reverse direction. As a result, as shown in FIG. 2, the opening / closing valve shaft 103 rotates in the opposite direction from time t3 to stop the water discharge.

After the on-off valve is closed, an appropriate torque is generated in the on-off valve shaft 103 so that the on-off valve shaft 103 is completely closed, and then the power supply to the motor 22 is stopped. Since the switch 112 is closed and the backward input signal 31 is at high level, the output of the AND circuit 19 becomes high level. This signal is input to the reset terminal of the D-type flip-flop 20 via the OR circuit 5. When the D-type flip-flop 20 is reset, the complementary output / Q signal becomes high level and is input to one input terminal of the AND circuit 13. If the motor 22 continues to rotate even after the on-off valve is closed, the current flowing through the motor 22 will increase and the level of the current detection signal 33 will reach a high level. This signal is input to the other input terminal of the AND circuit 13, and the AND circuit 13 outputs a high-level signal. This high-level signal is input to the reset terminal of the D-type flip-flop 11 via the OR circuit 12. The D flip-flop 11 is reset and the reverse rotation input signal 31 becomes low level. Since the forward rotation input signal 30 is already at the low level, the power supply to the motor 22 is stopped and the rotation of the opening / closing valve shaft 103 is stopped. (3) Case C: When the hand is detected before the predetermined time T elapses after the on-off valve opens and stops up to 360 degrees. The switch 112 closes when the on-off valve shaft 103 is at 360 degrees and one shot. It is assumed that the march 7 is triggered and a human hand is detected at time t2 before the elapse of the predetermined time T. When a high-level signal is output from the one-shot multi 3 and input to the D-type flip-flop 4 via the AND circuit 29, the output up to this point is inverted and a high-level complementary output / Q signal is output. It As a result, the high level complementary output / Q signal is input to the reset terminal of the D-type flip-flop 9 via the OR circuit 10. A low level signal is output from the positive output Q signal of the D flip-flop 9 and is input to the OR circuit 17. A low-level signal from the one-shot multi 3 is input to the other input terminal of the OR circuit 17 via the AND circuits 8 and 16. Therefore, the OR circuit 17 outputs the low-level positive rotation input signal 30.

Further, the high level complementary output / Q signal of the D-type flip-flop 4 is also given to the clock terminal CL of the D-type flip-flop 11, and the positive output Q terminal outputs the high-level reverse rotation input signal 31. To be done. As a result, the motor 22 rotates in the reverse direction, and as shown in FIG. 2, the opening / closing valve shaft 103 rotates in the reverse direction from time t2 and closes. (4) Case D: When the on-off valve opens to an angle of 360 degrees or more There are cases where it is desired to increase the flow rate, such as when pumping water into a bucket. In such a case, this circuit operates as follows. First, when a hand is detected by the infrared light receiving phototransistor 1, the forward rotation input signal 30 becomes high level and the reverse rotation input signal 31 becomes low level as in case A, and the on-off valve starts to open. In case A, the detection of the human hand is shorter than about 0.5 seconds set as the predetermined time in the one-shot multi 3. On the other hand, in case D, the hand is continuously detected from time t6 to time t7 which is longer than 1 second in FIG. As a result, the positive output Q signal from the D-type flip-flop 4 maintains the high level from this time t6 to the time t7. The forward rotation input signal 30 becomes high level and the reverse rotation input signal 31 becomes low level, and the motor 22 rotates in the forward direction. The forward rotation input signal 30 is at a high level when the angle of the on-off valve shaft 103 reaches 180 degrees, and the switch 112 is closed to input a high level signal to the clock terminal CL of the D-type flip-flop 20. . A high level signal is output from the positive output Q terminal of the D flip-flop 20. This signal is input to the reset terminal of the D-type flip-flop 9 via the OR circuit 10 and reset. As a result, the signal given from the positive output Q terminal of the D-type flip-flop 9 to the OR circuit 17 changes to low level. However, the one-shot multi 3 outputs a high level signal to the AND circuit 8. The other input terminal to the AND circuit 8 is also supplied with the high-level positive output Q signal from the D-type flip-flop 4, so that the AND circuit 8 outputs a high-level signal to the AND circuit 16. . The other input of the AND circuit 16 is given from the complementary output / Q terminal of the D-type flip-flop 15. Here, the D-type flip-flop 15 is in the reset state by inputting a high level signal from the complementary output / Q terminal of the D-type flip-flop 20 to the reset terminal. Therefore, the output signal from the complementary output / Q terminal of the D-type flip-flop 15 is also at high level, and the OR circuit 17 outputs a high-level signal. Therefore, the forward rotation input signal 30 maintains a high level, the motor 22 continues to rotate in the forward direction, and the on-off valve further opens. The hand that has been continuously detected is not detected from the time point t7, and when about 0.5 seconds elapses, the positive output Q signal from the one-shot multi 3 changes to low level. This signal is input to one input terminal of the OR circuit 17 via the AND circuits 8 and 16. At the other input terminal of the OR circuit 17, the switch 112 is closed, the positive output Q signal of the D flip-flop 20 is at high level, the D-type flip-flop 9 is already reset, and the low level signal is output from the positive output Q terminal. It has been entered. Therefore, the low-level positive rotation input signal 30 is output from the OR circuit 17 to the motor rotation direction control circuit 22. Both the forward rotation input signal 30 and the reverse rotation input signal 31 become low level, the rotation of the motor 22 is stopped and the on-off valve is stopped. (5) Case E: When the on-off valve opens up to an angle of 360 degrees or more and automatically closes after the elapse of the predetermined time T This operation is the same as in case B described above. That is, when the rotation of the motor 22 is stopped at time t7, the forward rotation input signal 30 falls to the low level. This signal 30 is input to the one-shot multi 7. From the one-shot multi 7, from the time t7 to the time t9 when the predetermined time T has elapsed, a low level signal is output from the auxiliary output / Q terminal, and a high level signal is output from the time t9. From this time point t9, the normal rotation input signal 30 becomes low level and the reverse rotation input signal 31 becomes high level as described above, and the motor 2 rotates in reverse and the on-off valve closes. (6) Case F: When the hand is detected before the predetermined time T 2 elapses after the on-off valve opens and stops at an angle of 360 degrees or more. This operation is the same as in case C described above. At time t7, the rotation of the motor 22 is stopped and the normal rotation input signal 30 becomes low level. At time t8 before the predetermined time T has elapsed, the hand is detected and the output of the D-type flip-flop 4 is inverted. From this time point t8, the forward rotation input signal 30 becomes low level, the reverse rotation input signal 31 becomes high level, and the on-off valve closes. (7) Case G: When the on-off valve opens until it fully opens (900 degrees) and then stops. When it is desired to maximize the flow rate, the hand should be continuously detected until the on-off valve fully opens. At time t12, the hand is detected, the on-off valve starts to open, and even after the on-off valve shaft reaches 360 degrees and the switch 112 is closed, the hand is still detected as in case D. A high-level signal is output from 3, and the output state of the D-type flip-flop 4 is maintained. As a result, the high-level forward rotation input signal 30 and the low-level reverse rotation input signal 31 are continuously input to the motor rotation direction control circuit 21, and the motor 22 continues to rotate in the forward direction.

At time t13, the on-off valve is fully opened (900 degrees), and if the motor 22 tries to continue rotating, the current flowing through the motor 22 increases and the current detection signal 33 rises to a high level. This signal is input to one input terminal of the AND circuit 18. Further, here, the high-level normal rotation input signal 30 is input to the data terminal D of the D-type flip-flop 20, and since the switch 112 is closed, the high-level signal is input to the clock terminal CL and the high-level signal is input. The positive output Q signal is input to the other input terminal of the AND circuit 18. As a result, a high level signal is output from the AND circuit 18 and input to the clock terminal CL of the D flip-flop 15. The D-type flip-flop 15 outputs a low-level complementary output / Q signal to the AND circuit 16. As a result, a low level signal is output from the AND circuit 16, a low level positive rotation input signal 30 1 is output via the OR circuit 17, and the rotation of the motor 22 is stopped. (8) Case L: When the opening / closing valve is fully opened and automatically closed after the predetermined time T has elapsed When the opening / closing valve is fully opened at the time t13 and the hand is not detected until the predetermined time T has elapsed, the above-mentioned The operation is the same as in case B or E. At time t15 when a predetermined time T elapses from time t13 when the opening / closing valve is fully opened, the forward rotation input signal 30 becomes low level and the reverse rotation input signal 31 becomes high level, and the motor 22 reversely rotates to open / close the opening / closing valve. close. (9) Case H: When the hand is detected before the predetermined time T elapses from the time t13 when the open / close valve is fully opened and the hand is detected before the predetermined time T elapses. Works like C or F. A high level signal is given from the one-shot multi 3, the outputs Q and / Q of the D-type flip-flop 4 are inverted, the motor 22 rotates in the reverse direction, and the on-off valve is closed.

Further, when the hand is detected while the motor 22 rotates in the reverse direction and the on-off valve is closing, the one-shot multi 3 outputs a high-level output Q signal. As a result, the positive output Q signal of the D flip-flop 4 is switched to the high level and the complementary output / Q signal is switched to the low level, the rotation direction of the motor 22 is reversed, and the on-off valve is opened again.

As described above, according to this embodiment, the amount of water can be adjusted very easily. In normal use, if the hand is brought close to the infrared LED 34 for at least a moment, the on-off valve shaft rotates 360 degrees and water flows. After this, even if no operation is performed, the open / close valve is automatically closed when the predetermined time T has passed, and the water is not wasted. If the user wants to close the door before the predetermined time T has passed, he / she should touch the hand again to detect it. Further, the torque generated in the motor 22 to completely close the on-off valve can be set to an arbitrary value by changing the setting of the level for detecting the current flowing in the motor 22.

When it is desired to increase the amount of water, the time for detecting the hand may be lengthened. The motor rotates while the hand is detected, and the on-off valve keeps opening. When the open / close valve is fully opened, the motor rotation automatically stops. After this, similar to the case where the open / close valve is opened up to 360 degrees, when the hand is detected again, the open / close valve starts to close, and when the hand is not detected, the open / close valve is automatically closed after the predetermined time T has elapsed.

The above-described embodiments are merely examples and do not limit the present invention. For example, the control circuit shown in FIG. 1 is an example, and various modifications are possible.

[0055]

[Effect of device]

 As described above, the automatic faucet device of the present invention is capable of adjusting the amount of water by detecting and controlling at least a part of the human body by the motor that rotates the existing water supply valve, and the faucet. It can be easily attached to the top of the faucet by attaching it to the top of the faucet, and since it is mounted on the top of the faucet, the distance between the faucet and the sink does not become small and does not interfere with use.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an electric circuit unit of an automatic faucet device according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a temporal change in a rotation angle of an opening / closing valve shaft in the automatic faucet device.

FIG. 3 is a cross-sectional view showing a state in which the automatic faucet device is attached to an existing water faucet.

FIG. 4 is a vertical cross-sectional view showing a state in which the automatic faucet device is attached to an existing water faucet.

FIG. 5 is a side view showing a state in which the automatic faucet device is attached to an existing water faucet.

FIG. 6 is a plan view showing a positional relationship between a cam projection and a switch attached to the opening / closing valve shaft of the automatic faucet device.

[Explanation of symbols]

 1 Infrared light receiving phototransistor 2 Amplifying circuit 3 One-shot multi 4, 9, 11, 15, 20 D-type flip-flop 6, 10, 12, 17, 36 OR circuit 7 One-shot multi 13, 14, 16, 18, 19 AND circuit 21 Motor rotation direction control circuit 22 Motor 23 Resistance 24 Bipolar transistor 26 Initial reset circuit 30 Forward rotation input signal 31 Reverse rotation input signal 33 Current detection signal 34 Infrared emission LED 37 Voltage drop reset circuit 38 Pulse oscillator 101 Water faucet 102 Hexagon nut 103 Open / close valve shaft 104 Main body case 105 Main body lid 106 Open / close valve drive shaft 107 Cam 109 Gear 110 Connecting screw 111 Electric circuit part 112 Switch 113 Sensor 114 Battery 115 Sensor window 116 Electric circuit cover 117 Cam part projection

Claims (9)

[Scope of utility model registration request] 1. An attachment means which can be attached to an upper part of a faucet of water supply, a detection means which is held by the attachment means and detects at least a part of a human body, and an opening / closing valve of the faucet portion which is held by the attachment means. A motor that rotates an on-off valve shaft to open and close the valve, and a control circuit that is held by the mounting means and that controls the rotation of the motor based on the result of the detection means detecting at least a part of the human body. Automatic faucet device characterized by 2. The automatic faucet device according to claim 1, wherein the control circuit first rotates the motor in a reverse direction so as to close the opening / closing valve when energized. 3. The control circuit has a current detecting means for detecting a current flowing through the motor, and stops the rotation of the motor when the current detected by the current detecting means exceeds a predetermined value. The automatic faucet device according to claim 1, wherein 4. The automatic faucet device according to claim 1, wherein the control circuit rotates the motor in a reverse direction so as to close the opening / closing valve when the power supply voltage becomes equal to or lower than a predetermined voltage. 5. The automatic faucet device further includes a cam connected to the shaft of the opening / closing valve, and a switch that operates when the cam rotates by a predetermined angle, and the control circuit is configured to operate by the detecting means. When at least a part of the human body is detected, the motor is rotated in the forward direction so as to open the on-off valve, and the rotation of the motor is stopped when the cam rotates by the predetermined angle and the switch operates, The automatic faucet device according to claim 1, wherein the motor is rotated in a reverse direction so as to close the opening / closing valve after a predetermined time has elapsed. 6. The automatic faucet device according to claim 5, wherein the predetermined angle can be arbitrarily set within a range of 360 degrees. 7. The control circuit is configured such that, while at least a part of a human body is continuously detected by the detecting means, the motor rotates in a positive direction and the cam rotates by the predetermined angle to switch the switch. The automatic faucet device according to claim 5, wherein the motor is controlled so as to continue rotating in the forward direction until at least a part of the human body is no longer detected even after the operation of. 8. The control circuit detects at least a part of a human body by the detecting means, and detects the human body by the detecting means before the motor rotates in a positive direction and the cam rotates to the predetermined angle. The automatic faucet device according to claim 5, wherein the motor is rotated in a reverse direction when at least a part of the electric power is detected again. 9. The control circuit causes the motor to move in the forward direction when at least a part of the human body is detected by the detecting means while rotating the motor in the reverse direction so as to close the on-off valve. It rotates, It is characterized by the above-mentioned.
The described automatic faucet device.