JP3095536B2 - 2-wire electronic switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-wire electronic switch which operates a load such as a low-power-consumption ventilator fan from one or two places such as a bathroom or a toilet.

[0002]

2. Description of the Related Art In general, a 100 V (or 200 V) voltage is supplied to a small-capacity consumer such as a house or a small-sized store mainly using electric lamps and small electric appliances. The power used was about 100 W to 1000 W. Many of such small electric appliances have a timer function, and a small motor or the like is used as the power of the timer mechanism, and the timer mechanism controls time to perform on / off control. .

[0003]

However, in recent years, due to the desire for energy saving in social life, low wattage type fans have been frequently used for loads such as ventilation fans used in ordinary households. Therefore, the power supply is 1
In a general household power supply circuit of 00V, for example,
Assuming that the power consumption of the ventilation fan is 2 W, the current flowing through the power supply circuit is as small as 0.02 A, so that it is difficult to use this as control power for the small motor that is the power source of the timer mechanism. There was a problem that.

[0004] Further, in the ventilation fan used in the bathroom, the needs of the consumer are gradually changing to those having a longer set time, and in recent years, a 180-minute timer is becoming mainstream. As a means for displaying the elapsed time in such a timer mechanism, a small motor, a mainspring, or the like is conventionally used as a power source, so that it can be known by the return rotation of the dial. However, in the case of an electronic switch with a timer function, three to five light emitting diodes are juxtaposed and light emission is displayed sequentially with the passage of time. However, when a ventilation fan with power consumption of about 2 W is used as a load. It is necessary to secure the control power of the electronic switch and the power of the indicator lamp for displaying the elapsed time using the load current, and also to secure 90% or more of the power supplied to the load.
Further, the load capacity also changes from 2 W to 200 W, and the type of load is required to correspond to those having different power factors, such as incandescent lamps, fluorescent lamps, and ventilation fans.

In such a difficult situation, it is required that one ventilation fan be provided with a flashing operation switch in a toilet and an electronic switch having a timer function of 180 minutes in a bathroom, for example. There are cases. At this time, even when only one switch is turned on, the energization indicator lights of both switches are illuminated and displayed, and even when both switches are turned on, the timer mechanism independently executes a timer operation, and the elapsed time is also measured. As indicated, there have been a number of difficult challenges requiring that both switches must operate completely independently.

The present invention has been made to solve such a conventional problem, and has a timer function for general household use.
It is an object of the present invention to solve the above-described problem by enabling a wire-type electronic switch to be configured by a combination of easily available and inexpensive electronic components.

[0007]

To achieve the above object, according to the Invention The two-wire electronic switch according to the present invention, between the first triac T ₂ -G terminal connected in series to an AC power source and the load 2 number of the constant voltage diode and photo triac triac connected in anti-series with connected in series, the AC side terminals of the first diode bridge connected between the first triac T ₂ -T ₁ terminal, the first A first transistor and a first switching element are connected between the DC side terminals of one diode bridge to form a self-holding circuit, and the first transistor is connected in parallel with the self-holding circuit via the light emitting diode of the phototriac. An integrated circuit and a second integrated circuit are connected, and a terminal of a divided output of a second integrated circuit operated by a divided output of the first integrated circuit is connected to a second switching element. Connecting the second switching element to the first switching element, and connecting an inverting transistor to the first switch and the first integrated circuit provided in the self-holding circuit to form a first integrated circuit. And after a predetermined time period has elapsed after the operation of the first switch according to the clock pulse width of the first integrated circuit, the operation is terminated by setting the control voltage to zero by the second switching element. I have.

[0008] In addition to the above configuration, an arbitrary number of light emitting diodes for displaying elapsed time can be connected to the second integrated circuit that operates by the divided output of the first integrated circuit. . Furthermore, one to the first diode AC terminals of the bridge connected between the first triac T ₂ -T ₁ terminal, provided a connection terminal via the second triac connects the other operation switch, the A constant voltage diode is connected between the T ₂ -G terminals of the triac ₂ and the AC side terminal of the second diode bridge is connected between the T ₂ -T ₁ terminals, and between the DC side terminals of the second diode bridge. In addition to connecting the light emitting diodes, an arbitrary number of light emitting diodes for displaying the elapsed time may be connected to the second integrated circuit operated by the divided output of the first integrated circuit.

With the above configuration, when the break contact of the first switch is in the off state, an AC power supply and a load are connected in series to the AC terminal of the first diode bridge, and the AC terminal is connected to the AC terminal. 100 V AC is applied to the DC side terminal and 100 V DC is generated at the DC side terminal. However, since the phototriac and the first triac are each in a non-conducting state, 100 V AC does not flow to the load in the power supply side circuit. Does not drive.

When the make switch is turned on by operating the first switch from the standby state, a current flows through the light emitting diode of the phototriac, thereby turning on the triac of the phototriac and connecting the two in reverse series. Since the first triac changes to the conductive state through the constant voltage diode, alternating current flows to the load in the power supply side circuit, and the load is driven. At this time, since the output of the third switching element in the control-side circuit is kept at the low level, the first integrated circuit does not oscillate and the second integrated circuit does not output.

Next, when the operation of the first switch is released, the make contact is turned off and the break contact is turned on, and the self-holding circuit having the first transistor, the first switching element, and the like operates to make the first contact. And the second integrated circuit is continuously supplied with direct current, and both the phototriac and the first triac are kept on. Therefore, while the load is continuously driven, the output of the third switching element in the control-side circuit changes to a high level, so that the first integrated circuit starts oscillating according to the clock pulse width and , The frequency of the divided output of the first integrated circuit according to the number of oscillations,
After a predetermined time elapses after the operation of the switch (break contact ON), the signal is output to the second switching element. As a result, the second switching element is turned off, the self-holding of the first transistor is released, the control voltage of the control side circuit becomes zero, the diode of the phototriac is turned off, and the first triac is turned off. Since the state changes, the flow of AC in the power supply side circuit stops, and the driving of the load ends.

After the operation of the first switch, the divided output of the first integrated circuit allows the second integrated circuit to generate an arbitrary number of light emitting diodes at regular intervals in accordance with the clock pulse width of the first integrated circuit. , And the light emitting diodes can be sequentially displayed. Further, by the operation of the second diode bridge driven through the operation of the second triac which is turned on through the constant voltage diode, the light emitting diode can be energized and emit light to display the operation of the electronic switch.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an electric circuit diagram showing a first embodiment of the present invention.

In FIG. 1, SW1 has a set time 180.
The electronic switch SW1 has three connection terminals P1, P2, and P3, and has an AC power source 1 between the second and third connection terminals P2, P3. And a low-power-consumption ventilator showing a specific example of an electric appliance as the load 2 are connected in series. The first connection terminal P1 is a terminal for connecting when operating from two places using another operation switch.

A first triac Q1 and a second triac Q2 are connected in series between the second and third connection terminals P2 and P3, and a first connection point is provided at a connection point between the two triacs Q1 and Q2. Terminal P1 is connected. The first triac Q1, is between T ₂ -T ₁ terminal varistor VZ
And a series circuit of two constant voltage diodes ZD1 and ZD2 connected in anti-series between the T ₂ -G terminals and a triac Qt of a phototriac, and two constant voltage diodes ZD3. , ZD4 and a series circuit of an interlocking switch SV of the variable resistor VR. The interlock switch SV is a switch that is turned on when the shaft of the variable resistor VR is fully turned counterclockwise. Note that T ₁ -G of the first triac Q1
A capacitor C1 for preventing noise and a resistor R1 are connected in parallel between the terminals.

Further, T ₂ -T of the first triac Q1
Between ₁ terminal connects the AC side terminals of the first diode bridge DB1, PNP on the anode side of the DC terminal of the first diode bridge DB1 is forming a switching operation
The emitter E of the first transistor TR1 is connected. A terminal A of a thyristor SCR, which is a specific example of the first switching element, is connected to a base B of the first transistor TR1 via a current limiting resistor R3.
The terminal is connected to the cathode side of the DC side terminal of the first diode bridge DB1. Further, the first transistor TR
1, the make contact m of the first switch S1 is connected between the emitter E and the collector C, and the emitter E and the base B
A resistor R2 is connected between them. And thyristor S
A resistor R4 and a capacitor C2 are connected in parallel between the G and K terminals of the CR. The first diode bridge D
By the circuit configuration of the DC side terminal side of B1, a self-holding circuit is provided so that the first transistor TR1 is self-held by the operation of the thyristor SCR at the same time as the connection (ON operation) of the first switch S1 to the make contact m. Has formed.

An electrolytic capacitor C is connected between the collector C of the first transistor TR1 and the K terminal of the thyristor SCR.
3 are connected. Thereby, the first transistor T
The collector C side of R1 is a DC power supply voltage side line V _DD , the cathode side of the DC side terminal of the first diode bridge DB1 is a DC power supply ground side line V _SS, and an electrolytic capacitor C3 is provided between both lines V _DD and V _SS. About 5
It is smoothed to a direct current of V (volt). Further, a phototriac light emitting diode Q is connected to the DC power supply voltage side line V _DD.
-d, and the light emitting diode Q-d is connected to the first integrated circuit IC1 and the second integrated circuit IC2.

The first switch S1 has a normally open make contact m and a normally cross break contact b.
The break contact b is connected to the base terminal B of the inverting transistor TR3. The inverting transistor TR3 is an inverting circuit that inverts a signal input from the base side terminal B and outputs the inverted signal from the collector side terminal C.
Together with and connected to the first integrated circuit IC1 pin 6 and the resistor R5 through a voltage side line V _DD of, the emitter terminal E is connected to the ground side line V _SS. Therefore,
When the first switch S1 is connected to the break contact b, a low-level signal is input to the base terminal B of the inverting transistor TR3, and a high-level signal is output from the collector terminal C. On the other hand, when the first switch S1 is operated and connected to the make contact m, the input signal of the base side terminal B becomes high level, which is inverted and a low level signal is output from the collector side terminal C.

The first integrated circuit IC1 mainly counts clock pulses. For example, MC14541B manufactured by Motorola can be used. This M
The C14541B incorporates a 16-stage binary counter and an oscillator used by connecting one external capacitor and two resistors, and is capable of counting up to 2 ¹⁶ = 65536. Here, of the first integrated circuit IC1,
Pins 1 to 3 are input terminals of an oscillator that oscillates by connecting one external capacitor C5 and two external resistors VR and R7, Pin 5 is an auto reset terminal, Pin 6 is a master reset terminal, 7 is a first ground voltage terminal, pin 8 is a maximum of 2 ¹⁶ output terminals, pin 9 is a second ground voltage terminal, pins 10, 12, and 13 are second ground terminals.
The power supply voltage terminal, pin 14 is a first power supply voltage terminal.

The second integrated circuit IC2 mainly outputs one of arbitrary outputs according to the number of input count pulses. For example, TC4017B made by Toshiba
P can be applied. This TC4017BP is
10 consisting of 5 stages of D-type flip-flops
Advancing a Johnson counter, the number of the applied count pulse to the clock or the clock inhibit input, one output of the ten output Q ₀ to Q ₉ becomes a high level. This counter advances the count state at the falling edge of the clock when the clock inhibit is low or at the falling edge of the clock inhibit when the clock is high, and sets the clock and clock inhibit when the reset input goes high. each reset the Q ₁ to Q ₉ to the low level while a high level regardless Q ₀ of the counter with. Here, the pin 2 of the second integrated circuit IC2 is Q ₁
Terminal, pin 3 is Q ₀ pin, pin 4 is Q ₂ terminal, pin 7 Q ₃ terminal, pin 8 is the power supply voltage terminal, pin 10 is Q ₄ terminal, pin 13 is a clock inhibit terminal, pin 14 is a clock terminal, Pin 16 is a ground voltage terminal.

The pin 5 of the first integrated circuit IC1 is connected to the ground line V _SS via the capacitor C4, and is also connected to the pin 10 and the pins 12 to 14 in common to connect the power supply voltage line V _DD. Connected to Pin 1 is connected to one end of a variable resistor VR for time setting, pin 2 is connected to one end of a capacitor C5, pin 3 is connected to one end of a resistor R6, and the other ends are connected to each other. A closed circuit is formed. Further, the pin 7 is connected to the ground line V _SS , and the pin 8 is connected to the pin 13 of the second integrated circuit IC2. Thus, the inverting transistor TR
3 is high, the pin 6 is reset and the first integrated circuit IC1 does not oscillate. When the input of the pin 6 changes to low, oscillation starts and the first integrated circuit IC1 starts oscillating.
C1 counts up to a maximum of 2 ¹⁶ = 65536, after which pin 8 goes high and its output signal is input to pin 13 of the second integrated circuit IC2. Note that the variable resistor V
R has a rotating shaft that changes the resistance value and the interlocking switch SV that is interlocked with the rotation angle of the rotating shaft. The interlocking switch SV is turned on when the rotating shaft is fully turned to one side.

Pin 2 of the second integrated circuit IC2 is the second light emitting diode LED2, pin 3 is the first light emitting diode LED1, and pin 4 is the third light emitting diode LED
3 and the pin 7 are connected to the ground line V _SS via the fourth light emitting diode LED4, respectively, and the pin 8 is directly connected to the ground line V _SS . The pin 10 is connected to a base B of a second transistor TR2, which is a specific example of the second switching element, and the base B is connected to a ground line V _SS via an electrolytic capacitor C6. The collector C of the second transistor TR2
Is directly connected to the ground side line V _SS , and the emitter E is connected to the G terminal of the thyristor SCR. Further, the pins 14 and 16 of the second integrated circuit IC2 are connected to each other and to the light emitting diode Qd of the photo triac.

Thus, the variable resistor VR and the capacitor C7
The period T (second) of the clock pulse of the first integrated circuit IC1 is determined by the combination of the resistor R6 and the variable resistor VR.
Can be varied from 0 to 1.29 msec by the change of the resistance value, and the output terminal of the pin 8 which is the divided output and the clock inhibit terminal of the pin 13 which is the clock input of the second integrated circuit IC2 are connected. Therefore, a clock pulse is input from the output terminal to the clock inhibit terminal every 45 minutes. With this clock input, the second
Q ₂ terminal, Q ₃ is a pin 7 Q ₀ pin is a pin 3 of integrated circuit IC 2, Q ₁ terminal is a pin 2, is a pin 4
Q ₄ terminal is a terminal and pin 10 is sequentially a high level every 45 minutes, four light emitting diodes LED1~4 for elapsed time display in response to this is successively turned every 45 minutes. Then, when the fourth light emitting diode LED4 goes out and the pin 10 goes high, the second transistor TR
2 is supplied with a base current and its emitter
Conduction is made between the collectors, and the control voltage becomes zero. As a result, the first transistor TR1, the thyristor SCR, and the phototriac light emitting diode Q-d and triac Qt are both turned off, thereby turning off the first triac Q1. Stops and enters the standby state.

In the second triac Q2, T
With Between ₂ -G terminals are connected to a constant voltage diode ZD5 fifth, between T ₂ -T ₁ terminal connecting the AC terminals of the second diode bridge DB2. A parallel circuit of a series circuit of the fifth light emitting diode LED5 and the resistor R7 and the electrolytic capacitor C7 is connected between the DC side terminals of the second diode bridge DB2.

Next, the operation of this embodiment will be described.
First, the series circuit of the AC power supply 1 and the load 2 is connected to the second and third circuits.
The case where the terminals are connected to the connection terminals P2 and P3 will be described. Now, it is assumed that the interlocking switch SV of the variable resistor VR is off and the rotational position of the rotating shaft is at an arbitrary angle. At this time, when the first switch S1 is off (connected to the break contact b), the AC power supply 1 and the load 2 are connected in series to the AC side terminal of the first diode bridge DB1. 100 V AC is applied to the AC side terminal and 100 V DC is generated at the DC side terminal. However, since the thyristor SCR, the first transistor TR1, and the first triac Q1 are each in a non-conductive state, the load 2 in the power supply side circuit has
00V does not flow, and the load 2 is not driven. Similarly, since no current flows in the control side circuit, the first integrated circuit I
C1 does not oscillate, and the second integrated circuit IC2 does not output.

When the first switch S1 is turned on (connected to the make contact m) from this standby state, a current is supplied to the gate G of the thyristor SCR, whereby the thyristor SCR is turned on and the first thyristor SCR is turned on. Current instantaneously flows through the base B of the transistor TR1. The switching operation of the first transistor TR1 is an instantaneous operation such as a push button operation. However, since the first transistor TR1 is self-held in the ON state by the operation of the self-holding circuit, the direct current is not included in the control-side circuit. Flows continuously. As a result, current is continuously supplied to the first integrated circuit IC1 and the second integrated circuit IC2 via the light emitting diode Q-d of the phototriac, and the light emitted from the light emitting diode Q-d causes the triac Q-d to emit light. t turns on. Therefore, two reversely connected constant voltage diodes ZD1, ZD
A current is supplied to the gate G of the first triac Q1 through D2, and the first triac Q1 is turned on. As a result, a current path connecting the second connection terminal P2, the first triac Q1, the third connection terminal P3, the AC power supply 1, and the load 2 is formed, and the AC flows continuously in the power supply side circuit. , The load 2 is driven.

At this time, T ₂ − of the first triac Q1
Two constant voltage diodes ZD1, connected between the G terminals
By the operation of ZD2, the AC voltage applied to the AC terminal of the first diode bridge DB1 is reduced to about 10V, and the DC voltage of the waveform generated at the DC terminal of the first diode bridge DB1 changes to about 5V. . The DC voltage of this waveform is 5 V due to the action of the electrolytic capacitor C3.
And applied between the voltage side line V _DD and the ground side line V _SS . At the same time, when the first switch S1 is turned on, the signal input to the inverting transistor TR3 changes to low level, so that the signal output from the inverting transistor TR3 changes to high level.
At this time, a DC of about 3 V flows in the control side circuit,
Pin 6 of the first integrated circuit IC1 (master reset terminal)
Is at a high level, the first integrated circuit IC1 does not oscillate. Accordingly, since the oscillation signal from the pin 8 of the first integrated circuit IC1 (output terminal of up to 2 ¹⁶⁾ is not output, the non-output state of the second integrated circuit IC2 is held.

When the ON state of the first switch S1 is released and changed to the OFF state from this state, the signal input to the inverting transistor TR3 changes to a high level. Changes to a low level, and the signal changes to pin 6 of the first integrated circuit IC1.
Is input to As a result, the first integrated circuit IC1 starts oscillating, an oscillation signal is output from the pin 8, and the oscillation signal is input to the pin 13 (clock inhibit terminal) of the second integrated circuit IC2. As a result, based on the frequency-divided output of the clock pulse that is set by the combination of the variable resistor VR, the capacitor C5, and the resistor R6 and output from the first integrated circuit IC1 every 45 minutes, the second integrated circuit IC2 Four pins 3, 2, 4 and 7 every 45 minutes (Q
Terminals) sequentially output high-level signals. As a result, the four light emitting diodes LED1 to LED4 are sequentially lit from the first to the fourth every 45 minutes, and the time from the start of driving the load 2 is displayed in four stages for a total of 180 minutes.

After the elapse of 180 minutes, the fourth light emitting diode L
When ED4 disappears, pin 10 of the second integrated circuit IC2
(Q ₄ terminal) from the second transistor TR2 the base B
, A current is supplied between the emitter E and the collector C, and the control voltage of the control side circuit becomes zero. As a result, the first transistor TR1, the thyristor SCR
Then, the first triac Q1 is turned off and changes to a non-conductive state. As a result, the supply of the current to the load 2 is stopped, and the driving of the load 2 is stopped.

At this time, the fifth light emitting diode LED5
Is equal to T ₂ -T by the action of a fifth constant voltage diode ZD5 connected between the T ₂ -G terminals of the second triac Q2.
Light is emitted by the action of the second diode bridge DB2 controlled based on the voltage generated between the _one terminals. The fifth light emitting diode LED5 emits light continuously for 180 minutes until the driving of the load 2 is stopped, and displays the energized state in conjunction with the driving of the load 2.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, an operation switch SW2 is provided separately from the above-described electronic switch SW1. For example, the operation switch SW2 is installed in a bathroom and the operation switch SW2 is installed in a toilet. This is a switch device capable of controlling the driving of the load 2 from a location. The operation switch SW2 has three connection terminals P4, P5 and P6, the fourth connection terminal P4 is connected to the first connection terminal P1, and the fifth connection terminal P5 is connected to the second connection terminal P5.
And the sixth connection terminal P6
Is connected to the third connection terminal P3 via the AC power supply 1 and the load 2.

A third triac Q3, a fourth triac Q4, and a second switch S2 are connected in series between the fourth and sixth connection terminals P4, P6, and a connection point between the two triacs Q3, Q4. Is connected to a fifth connection terminal P5. The third triac Q3, is between T ₂ -G terminal connected to the constant voltage diode ZD6 of the 6, T ₂ -
Between T ₁ terminals is connected to the AC side terminals of the third diode bridge DB3. Third diode bridge DB
3, a series connection of a light emitting diode LED6 and a resistor R8 and an electrolytic capacitor C8 are connected in parallel. Also, T ₄ -G of the fourth triac Q4
Two constant voltage diodes Z connected in anti-series between the terminals
D7 and ZD8 are connected. Furthermore, between the T ₁ terminal and the fourth connection terminal P4 of the fourth triac Q4, it is inserted through the second switch is turned on and off by a manual operation.

Next, the operation of the second embodiment will be described. It is assumed that the interlocking switch SV is off. First, when both the first switch S1 of the bathroom-side electronic switch SW1 and the second switch S2 of the toilet-side operation switch SW2 are off, that is, when the entire switch device is in a standby state, the electronic switch SW1 is turned on. First
Is not conducting, current does not flow through both switches SW1 and SW2, and load 2 such as a ventilation fan
Is not driven.

Next, the second operation switch SW2 of the toilet
Is turned on, the first triac Q1
Since the other three triacs Q2 to Q4 are in the ON state, the sixth connection terminal P6, the third and fourth triacs Q3 and Q4, the second switch S2, the fourth connection terminal P4, and the first Connection terminal P1 and the second triac Q2
And a third connection terminal P3, a load 2, and an AC power supply 1 are formed, and a current flows through the load 2 to drive the load 2. In this case, both the voltage across T ₂ -G terminal of the fifth light-emitting diode LED5 and the sixth light emitting diode LED6 occurs, both light emitting diodes LED5,6 emits light together. Therefore, the state of energization to the load 2 is displayed by light emission with both the electronic switch SW1 and the operation switch SW2,
In both the bathroom and the toilet, the driving of the load 2 can be visually checked by the light emission of the light emitting diodes LED5 and LED6.

Next, the case where the second switch S2 on the toilet side is off and the first switch S1 on the bathroom side is on will be described. When the first switch S1 is turned on, the thyristor SCR is turned on and the first transistor TR1 is turned on.
, The first transistor TR1 is held in the ON state by itself. Therefore, as described above, current is supplied to the first integrated circuit IC1 and the second integrated circuit IC2 through the light emitting diode Q-d of the phototriac, and the triac Qt is turned on. The first triac Q1 is turned on through the constant voltage diodes ZD1 and ZD2. Thereby, the sixth connection terminal P6, the third and fourth triacs Q3, Q4, the fifth connection terminal P5, and the second connection terminal P2
And a first and second triac Q1, Q2, a third connection terminal P3, a load 2, and an AC power supply 1 are formed. A current flows through the load 2, and the load 2 is driven.

At the same time, the first and second integrated circuits I
By the operation of C1 and IC2, the four light emitting diodes LED1 to LED4 sequentially display the elapsed time every 45 minutes as described above, and after the set time of 180 minutes has elapsed, the operation of the second transistor TR2 causes Power supply voltage side line V _DD
In addition, the conduction between the ground voltage side line V _SS and the control side circuit becomes zero. As a result, the first transistor TR1, the thyristor SCR, and the phototriac are all turned off, whereby the first triac Q1 is also turned off, so that the load current stops and the light emitting diode LE
The light emission display by the D5 and the LED 6 is also turned off and the apparatus enters a standby state.

The above is a description of the case where the electronic switch SW1 and the operation switch SW2 are individually operated. Next, the operation switch SW2 is operating in advance, and the first operation of the electronic switch SW1 is performed later. The case where the switch S1 is turned on will be described. When the operation switch SW2 is in operation, between the fourth T ₂ -T ₁ of the triac Q4, the fourth two constant voltage diode connected between T ₂ -G of the triac Q4 ZD7, ZD8 The first switch S1 is turned on when the voltage to be clipped is secured between the first and second connection terminals P1 and P2 of the electronic switch SW1 by setting the voltage to about 5 V, for example. As a result, an AC voltage of about 5 V is applied between the AC side terminals of the first diode bridge DB1, and a DC voltage of about 5 V is generated between the DC side terminals. Therefore, at the moment when the first switch S1 is turned on, the thyristor SCR is turned on, and a base current flows through the first transistor TR1 and the first transistor TCR is turned on.
R1 turns on. As a result, the phototriac is turned on by the same operation as when the electronic switch SW1 is operated alone, whereby a current flows to the load 2 through the first triac Q1 that is turned on. The current flowing through the load 2 is split and flows through the first triac Q1 and the fourth triac Q4. Based on the load current, the electronic switch SW1 and the operation switch SW2 operate as described above. Execute.

Next, when the electronic switch SW1 and the operation switch SW2 are both operating, one of the switches SW1
A case where 1 or SW2 is turned off will be described. When the second switch S2 of the operation switch SW2 is turned off first, the first to fourth triacs Q1 to Q3 hold the on state, and the sixth connection terminal P6 and the third and fourth triacs Q3 and Q4 , A fifth connection terminal P5, a second connection terminal P2, first and second triacs Q1, Q2, and a third
And a current path connecting the connection terminal P3, the load 2, and the AC power supply 1 to the first and second integrated circuits IC1, IC2.
The current flows through the first and second triacs Q1 and Q2 and the load 2
Current also flows, and the load 2 is driven until the end of the timer operation. When the electronic switch SW1 is turned off after finishing the timer operation, the first triac Q1 is turned off, but the second to fourth triacs Q2 to Q4 keep the on state, and the sixth connection terminal P6, third and fourth triacs Q3, Q4, second switch S2, fourth connection terminal P4, first connection terminal P1, and second triac Q
Since a current path connecting the second and third connection terminals P3, the load 2, and the AC power supply 1 is ensured, current continues to flow through the load 2 and driving of the load 2 is continued.

In this case, the fifth light emitting diode LED5 which is an energizing indicator of the electronic switch SW1 and the sixth light emitting diode LE which is an energizing indicator of the operation switch SW2.
D6 is lit not only when both switches SW1 and SW2 are operating together, but also when only one switch SW1 or SW2 is operating. Therefore, when one of the first and second switches S1 and S2 is operated, the energization display can be obtained by the other switch that is not operated, and the other switch is operating. You can know that.

Finally, a case where the second switch S2 of the operation switch SW2 is turned on during the operation of the electronic switch SW1 will be described. In this case, when the second switch S2 is turned on, the current flowing through the load 2 is divided into the first triac Q1 and the fourth triac Q4, but the current supply to the load 2 is continued. , The electronic switch SW1 and the operation switch SW2 are executed without being influenced by the operation of the other party.

Incidentally, the series circuit of the reverse series circuit of the two constant voltage diodes ZD3 and ZD4 provided between the T ₂ -G terminals of the first triac Q1 and the interlocking switch SV is independent of the timer operation. 1 to lock the triac Q1 on. When the interlock switch SV is turned on, the first triac Q1 is locked even if the timer operation is terminated.
Is locked on, and the load 2 is continuously driven. Further, in the above embodiment, the interlocking switch SV is provided on the rotating shaft of the variable resistor VR in consideration of the installation space and the like, and the turning shaft is turned to one side to perform a continuous operation, and to the other end, the interlocking switch SV is turned off. It is configured so that Further, since the timer time is determined by the clock cycle determined by the resistance value of the variable resistor VR according to the rotational position of the rotary shaft and the value of the capacitor C5, a time scale is attached to the dial fitted to the rotary shaft. Thus, the delay time can be displayed.

The above embodiment shows an example of the present invention. In this embodiment, an example in which a thyristor SCR is applied as a first switching element and a transistor TR is applied as a second switching element has been described. However, a transistor TR is applied as a first switching element, and a thyristor SC is used as a second switching element.
R can also be applied.

[0043]

As described above, since the present invention is configured as described above, the following effects can be obtained.

That is, according to the first aspect of the present invention, a wide range of electric power (for example, 2 W to 200 W) and power factor (for example, 1 to 0.5) can be obtained by a combination of inexpensive electronic parts that can be easily obtained. It is possible to provide a two-wire electronic switch in which the load can be reliably and easily controlled by a two-wire power supply circuit, and has a simple structure for general household use and can be manufactured in a small size.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to provide a small-sized household-use small-sized light emitting diode capable of easily displaying an elapsed time by a plurality of light emitting diodes. A linear electronic switch can be provided.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the operation state of the present electronic switch can be changed independently of the elapsed time display by the plurality of light emitting diodes. It is possible to provide a two-wire electronic switch capable of displaying electricity by light emitting diodes.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing a first embodiment of the present invention.

FIG. 2 is an electric circuit diagram showing a second embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 1 AC power supply 2 Load C1 to C8 Capacitors DB1, DB2, DB3 Diode bridge IC1 First integrated circuit IC2 Second integrated circuit LED1 to LED6 Light emitting diode P1 to P6 Connection terminal Q1 to Q4 Triac Q-d Phototriac light emitting diode Qt Phototriac triac R1 to R7 Resistance S1 First switch S2 Second switch SCR Thyristor (first switching element) SW1 Electronic switch SW2 Operation switch TR1 First transistor TR2 Second transistor (Second transistor) Switching element) TR3 Inverting transistor VR Variable resistor V _DD Power supply voltage side line V _SS Power supply ground side line VZ Varistor ZD1 to ZD8 Constant voltage diode

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-182569 (JP, A) JP-A-55-95891 (JP, A) JP-A-52-121368 (JP, A) JP-A-60-1985 98720 (JP, A) Japanese Utility Model Application Sho 64-38838 (JP, U) Patent 2965574 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G04F 3/00 301 H03K 17/28

Claims (3)

(57) [Claims] 1. A first power supply connected in series to an AC power supply and a load.
And _two photovoltaic triacs connected in series between the T ₂ -G terminals of the triac and the triac of the photo triac, and the T triac of the first triac.
Between ₂ -T ₁ terminal connects the AC side terminals of the first diode bridge, the self-holding circuit by connecting the first transistor and the first switching element between the DC terminals of the first diode bridge A second integrated circuit formed and connected to the first integrated circuit and the second integrated circuit via the phototriac light emitting diode in parallel with the self-holding circuit, and operated by the divided output of the first integrated circuit. A terminal of a frequency-divided output of the circuit is connected to a second switching element, and the second switching element is connected to the first switching element, and a first switch provided in the self-holding circuit is connected to a first switch. An inversion transistor is connected to the integrated circuit to control the start of counting of the first integrated circuit, and after a predetermined time period has elapsed after the operation of the first switch according to the clock pulse width of the first integrated circuit. A two-wire electronic switch wherein the operation is terminated by setting the control voltage to zero by the two switching elements. 2. A first power supply connected in series to an AC power supply and a load.
And _two photovoltaic triacs connected in series between the T ₂ -G terminals of the triac and the triac of the photo triac, and the T triac of the first triac.
Between ₂ -T ₁ terminal connects the AC side terminals of the first diode bridge, the self-holding circuit by connecting the first transistor and the first switching element between the DC terminals of the first diode bridge A second integrated circuit formed and connected to the first integrated circuit and the second integrated circuit via the phototriac light emitting diode in parallel with the self-holding circuit, and operated by the divided output of the first integrated circuit. An arbitrary number of light emitting diodes for indicating the elapsed time are connected to the circuit, and the divided output terminal of the second integrated circuit is connected to the second integrated circuit.
And the second switching element is connected to the first switching element,
An inversion transistor is connected to a first switch and a first integrated circuit provided in the self-holding circuit to control the start of counting of the first integrated circuit, and to control the start of counting of the first integrated circuit according to the clock pulse width of the first integrated circuit. A two-wire electronic switch, wherein the control voltage is set to zero by a second switching element after a predetermined time has elapsed after the operation of the first switch, and the operation is terminated. 3. A first power supply connected in series to an AC power supply and a load.
And _two photovoltaic triacs connected in series between the T ₂ -G terminals of the triac and the triac of the photo triac, and the T triac of the first triac.
Between ₂ -T ₁ terminal connects the AC side terminals of the first diode bridge, it provided a connection terminal for connecting the other operating switch through the second triac to one of the AC side terminals, the second triac T ₂ between -G terminals with connecting AC side terminals of the second diode bridge between and connect the constant-voltage diode and T ₂ -T ₁ terminal, a second diode bridge-emitting diode between DC terminals of the And a first transistor and a first switching element are connected between the DC side terminals of the first diode bridge to form a self-holding circuit. The light emitting diode of the phototriac is connected in parallel with the self-holding circuit. Any number for connecting the first integrated circuit and the second integrated circuit via the first integrated circuit and displaying the elapsed time on the second integrated circuit operated by the divided output of the first integrated circuit Connect the light-emitting diode, the second
The divided output terminal of the integrated circuit is connected to a second switching element, the second switching element is connected to the first switching element, and the first switch and the first switch provided in the self-holding circuit are connected. The counting of the first integrated circuit is controlled by connecting an inverting transistor to the integrated circuit of the second integrated circuit, and after a predetermined time period has elapsed after the operation of the first switch according to the clock pulse width of the first integrated circuit, A two-wire electronic switch, wherein the operation is terminated by setting a control voltage to zero by a switching element.