JPS60200613A - Electronic switch - Google Patents

Abstract

PURPOSE:To realize a long time timer of a high accuracy, also to make it small in size, and also to eliminate a current at the time of holding by using a load control part for controlling on and off of a load, and a latching relay of a two winding type operated by a push-operation of an operating switch of a one-push push-button type. CONSTITUTION:When an operating switch SW is on-operated, a set coil SC of a latching relay Ry is excited and a contact (r) is inverted and connected to a (b) terminal side, and a power source is supplied to a timer controlling IC9. At the same time, the timer controlling IC9 is reset by an H level signal inputted to a reset terminal RST, and also an output terminal OUT becomes an L level. When the on-operation of the operating switch SW is stopped, the reset terminal RST becomes an L level, this timer controlling IC9 starts a time count, and after a prescribed time (after a time-up), the output terminal OUT becomes an H level, a transistor Q1 becomes on, a reset coil RC of the latching relay Ry is excited, and the contact (r) is inverted to the (b) terminal side and the switch is returned to its initial state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electronic switch that temporarily turns on a load such as a lighting load by a one-button operation.

[Background Art 1] Figure 4 shows a circuit diagram of a conventional CR type delay time method, where AC is an alternating current power supply, 1 is a load such as a lighting load, L is an indicator light for position display, and SW is a The one-button type operation switch, CT, is a current detection lance. Reference numeral 12 denotes a delay operation circuit section, which includes a diode bridge DB, a capacitor C forming a delay time, a variable resistor VR1, a field effect transistor FET, and the like.

Reference numeral 13 denotes a dimming function section, which is driven by the output signal from the delay operation circuit section 12, charges the capacitor C6, turns on the GUAC DI and the TRIAC TR, and turns on the load 1 for a delay time.

In other words, the temporary lighting energy is secured by the current during energization, and a long time timer is obtained by the field effect transistor FET, but this method has the following problems. In other words, since the conventional example is a CR charging/discharging type, the operating time is determined by the amount of charge of the capacitor C and the value of the variable resistor VR for discharging. In order to obtain a timer, it is necessary to use a large capacitor (including its shape), making it difficult to miniaturize it, and furthermore, it constantly consumes current during standby.

[Object of the Invention] The present invention has been provided in view of the above-mentioned points, and has the object of realizing a highly accurate long-time timer, downsizing the timer, and further eliminating current during standby. The present invention provides an electronic switch.

[Disclosure of the Invention] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a block diagram, and FIG. 1152 shows a specific circuit diagram. In the figure, AC is an alternating current power supply, and 1 is a load such as a lighting load. A triac TR constituting a load control section 2 is connected to a series circuit of a load 1 and an alternating current power source AC. Reference numeral 5 denotes a noise prevention circuit section, which is composed of a capacitor C1 and an inductance. Note that this noise prevention circuit is not necessary when the noise level is low. 6 is triac T
This is a phase control unit that controls the phase of R, realizes input 2-wire wiring including AC power supply AC and load 1, and supplies power to the subsequent circuit, and is composed of a diac DI for the tri-amplifier and a capacitor C9. .

L is a position indicator light like a neon tube, TRIAC TR
is connected through a resistor at both ends. , 7 is a rectifier circuit section consisting of diode pre-7 and DB. 3 is an on/off inversion control unit that controls the phase control unit 6 to drive the triac TR on and off, and is a two-winding type two-turn relay R.
F+) Transistor QIfQ2t Capacitor C21 Resistor R
It is constructed from 8R2 etc. The connection between rl and 2 switching relays RF is α, SC is a set coil, and RC is a reset coil.

SW is a one-button push-operated operation switch, and is connected to one end of the set coil SC of the latching relay Ry. That is, by pressing the operation switch SW, the set coil SC is excited to turn on the load 1 (light up). Reference numeral 8 denotes a constant voltage circuit section composed of a Zener diode ZD, etc., to which power is supplied only during the delay operation time.

4 is a timer control unit that forms the delay time, that is, the time during which the load 1 is turned on (lit); the timer control IC 9
It is composed of resistors R and capacitors 0, which determine the time constant. +Vcc of the timer control IC 9 is a power supply terminal, GND is a ground terminal, and R and ST are reset terminals, which are reset by an H level signal. OUT is an output terminal, which outputs an L level signal during counting, and outputs an H level signal when time-up occurs. The light emitting diode LED indicates whether the load 1 is on or off.

Next, the operation will be explained. When the operation switch SW is turned on, the set coil SC of the latching relay Ry is excited and invertedly connected to the terminal If, rMb, and power is supplied to the timer control IC 9. At the same time, the timer control IC 9 is reset by the H level signal input to the reset terminal R8T, and the output terminal OUT becomes L level. In this state, transistor Q is in an off state, and reset coil RC of double switching relay R is not excited. On the other hand, if the operation switch sw is kept pressed, the reset terminal R3T becomes H level, the output terminal OUT becomes L level, and the pulse count of the predetermined period determined by the resistor R0 and the capacitor 0, that is, the time count. Will not start. Furthermore, when current flows through the set coil SC of the latching relay Ry, current flows through the diode bridge DB and the capacitor C6, and the capacitor c.

When the charged charge exceeds the breakover voltage of the diac DI, the triac TR is triggered and becomes conductive. Therefore, Tochiak TR
The load 1 is turned on (lights up) due to conduction.

Next, when the on-operation of the operation switch SW is stopped, the operation switch SW returns to the inverted state, the reset terminal R8T goes to L level, and the timer control IC 9 starts time counting.

After a certain period of time (after time-up), the output terminal OUT becomes H level and the transistor Q is turned on.

By turning on this transistor Q, latching relay R
The reset coil RC of y is excited, and the contact r is reversed to the bji side and returns to its initial state. At this time, capacitor C
The electric charge that was stored in 2 is the resistor RI.

Transistor Q21 discharges through resistor R2. Therefore, transistor Q2 gradually becomes semi-conductive from being completely ON.
It becomes non-conductive and the phase of the load 1 is controlled.

FIG. 3 shows another embodiment in which a multi-position operation function is added. A is a slave device, which consists of an operation switch SW1 and a position indicator light like a neon tube. The operation switch SW1 is connected in parallel with the operation switch SW in the parent device. In addition, the reset terminal R of the timer control IC9
Connect the transistor Q to 8T, and press the operation switch sw.
, sw.

When Q is on, transistor Q is turned off and reset is applied. Which operation switch sw, s
Even if w is operated, the load 1 can be turned on, and the operation is the same as in the previous embodiment, so a description thereof will be omitted.

[Effect of the Invention J] As described above, the present invention includes a load control section that controls on/off of the load, and a set coil of a two-winding latching relay that is excited by the push operation of a one-button push button operation switch. An on/off inversion control unit that turns on the load control unit using the inversion output of the relay, and counts pulses having a predetermined period based on the operation output of the operation switch, and excites the reset coil of the latching relay at time-up to output its inversion. Since it is equipped with a timer control section that outputs a time-up signal that turns off the load control section with a signal, it is particularly advantageous in that it uses a pulse count type timer control section compared to the conventional one that uses a CR type discharge circuit. By using this, it is possible to realize a highly accurate long-time timer, and there is no need to use a large capacitor, resulting in the effect of miniaturization.Furthermore, a two-winding type Because it uses a latching relay, it has the effect of eliminating current during standby.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of one embodiment of the present invention, Fig. 2 is a specific circuit diagram of the same as above, Fig. 3 is a specific circuit diagram of another embodiment of the same as above, and Fig. 4 is a circuit diagram of a conventional example. . 1 is a load, 2 is a load control section, 3 is an on/off inversion control section,
4 is a timer control unit, sW is an operation switch, Ry is a latching relay, SC is a set fill, and RC is a reset coil. Agent: Patent Attorney Ishi 1) Chief 7th Procedural Amendment (Voluntary) May 7, 1980 2, Title of Invention Electronic Switch 3, Relationship with the case of the person making the amendment Patent applicant 11', Location: Kadoma, Osaka Prefecture City bold Kadoma 1048 address name
Name (583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4, Agent postal code 530 5, Date of amendment order Voluntary party.'' +-A 7x

Claims (1)

[Claims] (1) A load control unit that controls the load on and off, and a set coil of a two-winding latching relay is energized by pressing the one-button push button operation switch, and the inverted output of the latching relay turns on the load control unit. an on-off inversion control section and a time-up signal that counts pulses having a predetermined period according to the operation output of the operation switch, excites the reset coil of the latching relay at time-up, and turns off the load control section with the inversion output signal; An electronic switch comprising a timer control unit that outputs.