JP2000048699A - Switch device with delayed switching-off function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch device with a delayed switching-off function capable of setting a long limited time, and easy to operate. SOLUTION: In this switch device, an electronic timer 4 turns on a TRIAC 2 through a trigger circuit 3 by driving a switch SW1 and connects a load 1 to an AC power supply AC, in order to operate the load 1. In this operation, if the switch SW1 is driven again, the electronic timer 4 counts a limited time set in advance, stops triggering to the TRIAC 2 when counting of the limited time is completed, and switches off the TRIAC 2, in order to separate the load 1 from the AC power supply AC.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device with a delay-off function for delaying off a ventilation fan provided in a toilet or the like.

[0002]

2. Description of the Related Art Conventionally, as a switch device for turning on or off a lighting or a ventilation fan, there is a temporary operation type switch device having a built-in mechanical timer which is automatically turned off after a lapse of a predetermined time from an ON operation.

On the other hand, when the ventilation fan is operated for a long time to dry the bathroom, a long-time timer operation is required. Therefore, depending on the rotation position of the operation handle,
A mechanical timer switch device that can set a time limit operation of up to 120 minutes may be used, but it is necessary to rotate the operation handle every time it is operated, and to return the operation handle even if you want to forcibly turn it off There was a problem that the usability was poor.

[0004]

As described above, the former temporary operation type switch device cannot be used as a ventilation fan in a bathroom because the time limit is short, and the latter timer switch device has poor operability.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a switch device with a delay-off function that can be set for a long time and is easy to operate.

[0006]

According to the first aspect of the present invention, there is provided an operation switch unit comprising a push button type switch, an electronic timer unit, and a load switching unit for turning on / off between a load and a power supply. The electronic timer section generates the timer output when the operation switch section is operated in a state where the timer output is not generated, and starts the timed operation when the operation switch section is operated in the state where the timer output is generated. And stopping the generation of the timer output when a time limit set in advance by the time setting unit has elapsed, and the load switching unit is turned on during the generation of the timer output to connect the load and the power supply. It is characterized by.

[0007] The invention of claim 2 is characterized in that, in the invention of claim 1, the load is a ventilation fan.

According to a third aspect of the present invention, in accordance with the first or second aspect of the present invention, a second load opening / closing section is provided, which interlocks with the operation switch section and inverts each time the operation switch section is pressed.
The second load switching unit is inserted between the second load and the power supply.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a lamp for displaying a position is additionally provided.

A fifth aspect of the present invention is characterized in that, in the fourth aspect of the present invention, the lamp blinks while the electronic timer is operating.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 shows a circuit configuration of the present embodiment. In the illustrated embodiment, a load switching unit is provided between an AC power supply AC and a load 1 such as a ventilation fan. The trigger circuit 3 of the triac 2 is connected to a microcomputer (or timer I).
Has a configuration which controls the timer output of the electronic timer 4 consisting of C), one end of the power connected to the terminal E the AC power source AC, the load connecting terminal L ₂ connected to one terminal of the load 1,
The power connection terminal L ₁ connecting the connection point between the other end of the AC power source AC and the load 1, is connected the triac 2 is provided between the power connection terminal E and the load connection terminal L _2.

The electronic timer 4 is stabilized by a stabilizing power supply 5.
DC voltage Vcc as the operating power supply, and in the standby state, the input port
I₁Input level is, for example, a push button type switch SW
₁Switch from "H" level to "L" level
When falling, this falling is detected and output port O
₁Is inverted from “H” level to “L” level,
O₁Photocoupler light emitting diode connected to
LED₁Is turned on, and this light turns on the trigger circuit 3.
Gage phototransistor Q₁To turn on and hold
Has become. In this holding state, the input port I
₁Input level changes from “H” level to “L” level.
When lowered, input port I_TwoPreset according to the input level of
The time is counted for the set time limit, and
When the counting is completed, the output port O₁Output level
Is inverted from “L” level to “H” level,
Light emitting diode LED₁Turn off the phototransistor
Q ₁Is turned off. Input port I_Two
A / D converter is built in in correspondence with
The input level can be set according to the resistance value of the variable resistor VR.
Depending on the size of the input level, for example, 0 to a number.
Time presets can now be preset within a time range
I have. That is, the time limit setting unit of the electronic timer 4 is a variable resistor.
VR.

[0013] When the electronic timer 4 falls from the input level is "H" level of the input ports I ₃ to "L" level, the operation state is programmed to return to the standby state, to the input port I ₃ is connected to the switch SW ₂ for external forced off consisting of push-button switch.

An output port O ₂ of the electronic timer 4 has a driving transistor Q for controlling the lighting of a light emitting diode LED ₂ for a firefly function indicating the position of the switch device.
₃ connects the base, electronic timer 4 is in the standby state by turning on the driving transistor Q ₃ in the "H" level to the output level of the output port O ₂ emitting diode LED
₂ is turned on continuously, and the “H” level and “L”
The driving transistor Q ₃ is turned on and off by switching on the level alternately, so as to blink the light emitting diode LED _2.

The trigger circuit 3 detects the T_Twoend
A diode with an AC input terminal connected between the
Bridge Bridge DB₁And this diode bridge DB₁
Between the output terminals of₁Thyristor Q connected via
_TwoAnd diode bridge DB₁Connected between the output terminals of
Resistance R_TwoAnd phototransistor Q₁And diode D ₁
And resistance R_ThreeAnd capacitor C₁Series circuit with parallel circuit
And a diode D₁And resistance R_ThreeConnection point with
The thyristor Q_TwoConnected to the gate
Jista Q₁Thyristor Q when is on_TwoTrigger
Turn on the diode bridge DB₁Between the output terminals of
Anti-R₁Through the resistor R_FourAnd con
Densa C_ThreeParallel circuit and diode bridge DB
₁And the resistance R ₁And thyristor Q_TwoAnd diode bridge
Ledge DB₁To the triac 2
Riga signal is given. The photocoupler is
For insulating between the rigger circuit 3 and the electronic timer 4
It is.

[0016] composed of a stabilized power supply 5 and the power connection terminal E, the rectifying and smoothing circuit and the stabilizing for example three-terminal regulator to a predetermined voltage AC power supply AC to the rectifying and smoothing connected between the power connection terminal L ₁ And an electronic timer 4 comprising a microcomputer and a light emitting diode L of a photocoupler.
ED ₁ and a driving power supply for the light emitting diode LED ₂ for display are supplied.

The delay of this embodiment configured as described above
The switch device with the off function is a piano
Embedded wiring device using large handle of handle type
It is stored in the body corresponding to the size module of the
Switch SW on the front of the ₁Expose the drive button
The large operation handle pivots the drive button on the front of the body.
Structure of the operation switch section
FIG. 2 is a front view of an example of the embodiment, and FIG.
The switch device A with the OFF function is provided with a mounting frame (not shown).
Change the size of the opening of the attached window to 1/3 of the longitudinal dimension.
A container made of joules with dimensions twice as large
Body with the size of one unit module in the same mounting frame
SW for forced off using_TwoSwitch with
This shows a state in which the device B is also provided. Here, the present embodiment
Switch A with delay-off function is a large operation handle
H₁When the is removed from the front side, the variable resistor is
The operation unit 6 of the arrester VR is exposed, and the variable resistor VR
Operate the operation unit 6 of the slide type variable resistor in the example shown.
And adjust the position of the operation unit to the scale 7 indicating the time limit
Thus, the time limit can be set.
The variable resistor VR may be of a rotary type. Note that in FIG.
8 is a decorative plate.

In the standby state, the operation handle H
By operating press _1, driving the switch W ₁ delay off switch with device A, the electronic timer 4 switches S
W ₁ of detecting the input level falling edge of an input port I ₁ by driving the power level of the output port O ₁ from "H" level "L" is inverted in level. The light emitting diodes LED ₁ of the photocoupler is turned by the inverting phototransistor to Q ₁ trigger circuit 3 is turned on. Thyristor Q ₂ by the on turns on, triggering the triac 2 of load switching unit. As a result, the triac 2 turns on, connects the load 1 to the AC power supply AC, and operates the load 1.

Next, during this operation, when the switch W ₁ is driven again to detect the fall of the input port I ₁ , the electronic timer 4 responds to the voltage level of the input port I ₂ set by the variable resistor VR. The operation of counting the time limit started is started. The start of the time limiting operation and the level of the output port O ₂ simultaneously switched alternately into a "H" level to the "L" level, turning on or off the transistor Q _3.
The on-off, light emitting diode LED ₂ is flashing through the display window 9 of a large operation handle H ₁ to indicate that is in limited operation.

The electronic timer 4 when the count of times the limit time expires inverts the "H" level from the "L" level the level of the output ports O _1, turns off the light emitting diodes LED ₁ of the photocoupler. Thus phototransistor to Q ₁ trigger circuit 3 is turned off, turning off the thyristor Q _2. With this turn-off, the triac 2 of the load switching unit is also turned off, disconnecting the load 1 from the AC power supply AC and stopping the operation of the load 1. In other words, only the time limit,
The delay will be turned off. Also returned to the level "H" level of the output port O _2, by turning on the driving transistor Q ₃ is adapted to the light emitting diode LED ₃ is lit continuously.

[0021] may be where push large operation handle of H ₂ switching device B for forced off when it is desired to forcibly turned off during the operation of the electronic timer 4 operation, switch SW ₂ is driven by the pressing operation . Input port I
When the _second input level falls, the output level of the output port O ₁ electronic timer 4 at which point the "L" level to the "
H "is inverted in level, returns to the standby state by turning off the triac 2. That forcibly terminated in will return to the standby state the operation of the load 1. Note that large operation handle H ₂ is switched with a delay off function to enhance the slightly smaller to identify than large operating handle H ₁ of the apparatus a.

As described above, in this embodiment, the microcomputer is used.
An electronic timer 4 using a computer
The time limit can be set within a short range, and a push-button switch
SW ₁ON operation of load 1 and delay OFF only by pressing
Operation can be performed, and the switch device B for forced OFF is pressed.
The load 1 can be forcibly turned off only by performing an operation.

In the first embodiment, a container having a size twice as large as the unit module is used. However, if a unit of one unit module is used, the lighting load provided as shown in FIG. The switch device C for turning off can be provided in the same mounting frame.

(Embodiment 2) In Embodiment 1 described above, the electronic timer 4 composed of a microcomputer is used. However, as shown in FIG. 5, an electronic timer 4 'using a CR time constant may be used.

[0025] In this embodiment, push-on as shown, push-off type load connection switch SW ₁ consisting of push button switches through the primary side of the current transformer CT ₁ and power supply connection terminal E of the terminal L ₂ Connected between

The electronic timer 4 ', current transformer CT from the detected output of the secondary side of ₁ occurs, intended to generate a timer output until a certain time gone detection output, a time constant circuit CR is constituted by current transformer secondary output of CT ₁ charges the capacitor C ₃ in output that is rectified by a diode bridge DB _2, a capacitor C which is determined by the setting of the variable resistor VR the connected to both ends of the capacitor C ₃ The time limit is set by the discharge time of ₃ . The rectified output of the diode bridge DB ₂ is a resistor R ₄ and a zener diode ZD.
Peak value is regulated by the voltage regulation circuit consisting of, it is so as to charge the capacitor C ₃ through the diode D ₂ for preventing reverse flow at the output of the voltage regulation circuit. The trigger circuit 3 includes a diode bridge DB ₁ , a thyristor Q ₂ , a transistor Q ₄ , an FET Q _{5, and the} like.
During charging voltage of the capacitor C ₃ is a constant voltage or more, held in the conductive state of the triac 2.

Next, the operation of the circuit of FIG. 1 will be described.

Firstly when the switch SW ₁ is the capacitor C ₃ of the electronic timer 4 'in the off state is not charged, that is, during standby, is under bias FETs Q ₅
(Depletion mode). Therefore, AC power supply A
C, resistor R ₄ , diode bridge DB ₁ , resistor R ₆ ,
A current flows through the path of the resistor R ₇ , the FET Q ₅ , the diode bridge DB ₁ , and the load 1. Therefore, the transistor Q
The base potential of the ₄ is lowered, the transistor Q ₄ is turned off. Therefore the thyristor Q ₂ is not supplied with a gate current, the thyristor Q ₂ in OFF, and is not to apply a trigger for turning on the triac 2. here,
Transistor Q for controlling the transistors Q ₆ and the transistor Q ₆ is connected to both ends of the capacitor C _3
7, the noise during this waiting constitute a malfunction prevention circuit that prevents charged superimposed on a capacitor directly C _3.

Now, when the switch SW ₁ is turned on, the load 1 is connected to the AC power supply AC to operate, and the current from the AC power supply AC is passed through the load 1 to the current transformer C.
It flows through the primary side of T _1, 2-order output, i.e. the detection output is generated. The secondary output is charged capacitor C _3, the negative voltage is applied between the gate and source of the FETs Q _5, FETs Q ₅ is turned off.

[0030] In this way, when the FETQ ₅ is turned off, it takes a bias which is turned to the transistor Q _4,
This by turning on the transistor Q ₄ to the thyristor Q ₂ gate current is supplied, the thyristor Q ₂ is turned on. Therefore, a trigger is a triac 2 via the diode bridge DB ₁ by turning on the thyristor Q _2, is turned on.

[0031] Then the switch SW ₁ is the turned off, the AC power source AC through the triac 2 to continue operating state is supplied to the load 1. Secondary output of the current transformer CT ₁ is eliminated by turning off the switch SW _1, but the voltage across the capacitor C ₃ is discharged through a variable resistor VR, FETs Q ₅
The on state of the triac 2 continues until the voltage drops below the cut-off voltage. When the voltage across the capacitor C ₃ has passed a predetermined time falls below the voltage FETs Q ₅ is turned on, current flows through the FETs Q _5, the transistor Q ₆
Is turned off. Therefore, the thyristor Q ₂ is also turned off,
The trigger is not applied to the triac 2, the supply of the AC power supply AC to the load 1 is stopped, and the state returns to the standby state. Incidentally, a current flows through the FETs Q ₅ as described above, the transistors Q _7, Q ₈ since turned on, charges of the capacitor C ₃ in this case is quickly discharged. Therefore, switching when the operation of the load 1 is stopped is performed smoothly.

[0032] The capacitor C ₃ being adapted to be connected to the switch SW ₂ for external forced off consisting of push button switch in parallel, and turns on the switch SW ₂ during the operation of the electronic timer 4 ' , Almost instantaneously the capacitor C
By forcibly discharging the charge of ₃ , the load 1 can be forcibly turned off.

The current transformer CT ₂ having the primary side inserted between the power supply connection terminals E and L ₂ turns on the light emitting diode LED ₃ with its secondary output to indicate that a load operation is being performed. And the light emitting diode LED ₃ constitutes a pilot lamp.

Further current transformer CT and the series circuit of the switch SW ₁ through the current limiting resistor Ro connects the neon lamp NE, neon lamp NE switches SW ₁ and the triac 2 are both turned off, i.e. the load 1 Is off, a current flows through the load 1 and the current-limiting resistor R ₀ to emit light,
Works as a firefly function.

The switch SW ₁ constitutes an operation switch unit using a large operating handle of the embodiment similarly to the piano rotary knob, is driven by the pressing of the large operating handle, also the operation of the variable resistor VR is large The operation handle is normally hidden, and the time limit can be set by removing the operation handle. It goes without saying this is the operating handle used when being displayed window is provided so as to see the light emission display of neon lamp NE and the LED LED _3.

(Embodiment 3) Both Embodiments 1 and 2 have a configuration in which only the load 1 is turned on and off. However, with one switch, the lighting load is turned on and off, and the ventilation fan is turned on simultaneously. In the present embodiment, turning off is delayed off.

FIG. 5 shows a circuit configuration of this embodiment is basically the same circuit as the second embodiment, interlocking the first and the contacts S ₁ to the switch SW _1, and the contact S ₁ and a second contact S _2, and the load connection terminal L ₁ connecting the lighting load 10 having one end connected to the connection point of the load 1 and the AC power source AC is ventilation fan, 1 of the current transformer CT ₁ Tsugimaki connecting the contact S ₂ between the connection point between the line and the contact S _1. ,
Although the contact S ₁ is one that has the same role as the switch SW ₁ of the second embodiment, the contact S ₂ constitutes a second load switching unit, the lighting load 10 in conjunction with the on-off contacts S ₁ The energization is directly turned on and off. That off to the lighting load 10 immediately at the time it is turned OFF operation simultaneously and the load 1 is a lighting load 10 and the ventilator when the ON operation switch SW _1, a load 1 is exhaust fan works by delay off of the electronic timer 4 ' You do it. The operation of the electronic timer 4 'is the same as that of the second embodiment, and the description is omitted.

In the first embodiment, a second load switching unit comprising a switching element such as a triac for turning on / off a lighting load is provided, and the second load switching unit is turned on / off by an output of an electronic timer 4 'comprising a microcomputer. In this way, the power may be turned off instantly separately from the off delay.

[0039]

According to the first aspect of the present invention, since the electronic timer is used as described above, the range in which the time limit can be set can be set to a large range, and the time limit can be set in advance. In addition, since the operation switch section is a push button type switch, the same operation as a normal switch operation can be performed, so that operability is improved.

According to a second aspect of the present invention, in the first aspect of the present invention, since the load is a ventilation fan, it is possible to cope with a case where the load is extended and a case where a long delay off is required as in a bathroom ventilation fan. There is an effect that can be.

According to a third aspect of the present invention, in accordance with the first or second aspect of the present invention, a second load opening / closing section is provided, which interlocks with the operation switch section and reverses each time the operation switch section is pressed.
Since the second load switching unit is inserted between the second load and the power supply, there is an effect that two loads such as a ventilation fan for delaying off and a lighting load for immediately turning off can be interlocked. is there.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, since a lamp for displaying a position is additionally provided, the present position can be recognized even at night.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the lamp blinks during the operation of the electronic timer, so that it is easy to distinguish between the operation of the electronic timer and the standby state.

[Brief description of the drawings]

FIG. 1 is a circuit diagram according to a first embodiment of the present invention.

FIG. 2 is a front view showing a use state of the above.

FIG. 3 is a front view of the time limit setting unit according to the first embodiment;

FIG. 4 is a front view showing a use state of another example of the above.

FIG. 5 is a circuit diagram according to a second embodiment of the present invention.

FIG. 6 is a circuit diagram according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Load 2 Triac 3 Trigger circuit 4 Electronic timer 5 Stabilized power supply SW ₁ switch AC AC power supply

Claims (5)

[Claims] 1. An operation switch unit comprising a push button type switch, an electronic timer unit, and a load switching unit for turning on and off a load and a power supply, wherein the electronic timer unit is in a state where timer output is not generated. When the operation switch section is operated below, the timer output is generated, and in this timer output generation state, when the operation switch section is operated, a timed operation is started and set in advance by timed setting means. A switch device with a delay-off function, wherein the generation of the timer output is stopped when a time limit elapses, and the load switching unit is turned on during the generation of the timer output to connect the load to the power supply. 2. The switch device with a delay-off function according to claim 1, wherein said load is a ventilation fan. 3. A second load switching unit which is turned over each time the operation switch unit is pressed, in conjunction with the operation switch unit, wherein the second load switching unit is provided between the second load and the power supply. 3. The switch device with a delay-off function according to claim 1, wherein the switch device is inserted into the switch device. 4. The switch device with a delay-off function according to claim 1, further comprising a lamp for displaying a position. 5. The switch device with a delay-off function according to claim 4, wherein said lamp is turned on and off during operation of an electronic timer.