KR960005981B1 - One touch switch - Google Patents

Abstract

The equipment reduces the abrasion of contact point to prolong it's durability. Condenser(C1) is charged with the power current which comes from a power source through a load(202) and resistors(R1)(R2). Bios current controling device(200) consecutively generates bios current of switching on or switching off by user's operation of an one-touch switch(200a). The first switching device charges or discharges bios current controlling device(200) by receiving bios current of switching on or switching off. The second switching device sends electric current to resistors after switching on the first switching device.

Description

One touch electronic switch

1 is a conventional mechanical focus switch circuit diagram.

2 is a one-touch electronic switch circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

200: bias voltage control means 201: switching means

202: load 200a: switch

TR1, TR2: first and second switching elements C1: capacitor

The present invention relates to an on / off switch for controlling the driving of a load in a general electric circuit or an electronic circuit, and more particularly, to eliminate the shortening of the lifespan caused by the wear of the contact when the mechanical switch is opened and closed, The present invention relates to a one-touch electronic switch for semi-permanently controlling the driving of an electric electronic circuit.

The conventional mechanical switch contact circuit has a mechanical switch 100 having two first and second fixed terminals S1 and S2 and one movable terminal S0, as shown in FIG. The load 101 connected to the load 101 and operating according to opening and closing of the mechanical switch 100 is connected to the power supply terminal Vcc.

In the conventional mechanical switching contact circuit configured as described above, first, the movable terminal S0 of the mechanical switch 100 is switched to its second fixed terminal S2 side connected to ground, and the current from the power supply terminal Vcc is applied to the load 101. ), The load 101 does not operate because a closed circuit is not formed.

Then, when the movable terminal S0 of the mechanical switch 100 is switched to the first fixed terminal S1 side connected to the load 101, the current supplied from the power terminal Vcc is the load 101, the Bypassing to ground through the first fixed terminal (S1) and the movable terminal (S0) of the mechanical switch 100, that is, the load 101 is operated by forming a loop of current.

However, in the conventional mechanical switch contact circuit, since the current in the operating state of the load flows through the first fixed terminal and the movable terminal of the mechanical switch, the contact of the mechanical switch is turned on and off by the spark between the contacts. In addition, the wear of the switch due to the wear and tear of the contact due to the opening and closing of the mechanical switch for a long time as well as the loss of the function of the switch has a problem that the life of the switch is shortened.

Accordingly, an object of the present invention is to eliminate the wear of the contact caused by the flow of the current and to act as a switch by using a switching element to flow the current without using a method of flowing a current to the load by opening and closing a conventional mechanical switch It is to provide a one-touch electronic switch to implement the semi-permanent.

As a means for achieving the object of the present invention, the bias voltage control means for supplying a bias voltage by charging and controlling the voltage input from the power supply terminal in accordance with the on / off selection of the user, and obtained by the bias voltage control means It is achieved by the switching means for conducting and blocking by the bias voltage to control the operation of the load, when described in detail with reference to the accompanying drawings of the present invention.

FIG. 2 is a one-touch electronic switch circuit diagram of the present invention, and as shown therein, the power supply voltage output from the power supply terminal Vcc through the load 202 is charged to the capacitor C1 through the resistors R1 and R2. By biasing the one-touch switch 200a repeatedly by the user's selection, the bias voltage control means 200 sequentially outputs the bias voltage of the switching or switching off, and the bias voltage control means 200. When the bias voltage of the switching-on is outputted at the first and second switching elements are conducted so that the current flows through the load 202 to maintain the state and the capacitor (C1) of the bias voltage control means 200 Discharges the charging voltage and the first and second switching elements are cut off when the bias voltage of the switching-off is output from the bias voltage control means 200 so that the current flows through the load 202. The switching means 201 is configured to maintain the state by controlling the flow of the gas and to charge the capacitor C1 of the bias voltage control means 200.

In addition, the switching means 201 uses the bias voltages of the switching on and the switching off which are supplied according to the on of the switch 200a of the bias voltage control means 200 to the resistors R4 and R3 of the ground. The first transistor TR1 and the first transistor TR1, which are input to the base through the base and are turned on and off and make the bias voltage control means 200 in a discharged state and a charged state, are connected to each other. A second transistor TR2, which is a second switching element that conducts and flows through a load 202 and causes a current to flow to the connection points of the resistors R4 and R3, is described. In the drawing, reference numeral R1 denotes a second transistor. It is a resistor connected to the emitter and base of TR2.

Referring to the effects of the present invention configured as described above in detail.

First, when voltage is first applied between the power supply terminal Vcc and the ground while the switch 200a of the bias voltage control means 200 is open, the first transistor TR1 of the switching means 201 is configured. Since the current is not supplied to the base, the first transistor TR1 is cut off, and when the first transistor TR1 of the switching means 201 is cut off, the second transistor TR2 connected thereto is also cut off, so that the load The operation of 202 is also stopped, and the collector potential of the first transistor TR1 receives the power supply voltage of the power supply terminal Vcc through the load 202.

Therefore, the potential of the capacitor C1 of the bias voltage control means 200 and the emitter potential of the second transistor TR2 configured in the switching means 201 also increase the power supply voltage of the power supply terminal Vcc through the load 202. I'm hanging.

In this state, when the user presses and releases the movable terminal S0 of the switch 200a configured in the bias voltage control means 200 toward its fixed terminal S1 side, it is charged in the capacitor C1 of the bias voltage control means 200. When the charged voltage is turned on when the switch 200a is turned on, the switching is outputted as a bias voltage, and the switching voltage is applied to the first through the resistor R4 and the resistor R3 of the ground of the switching means 201. It is applied to the base of the transistor TR1 to conduct the first transistor TR1.

When the first transistor TR1 conducts, the voltage applied to the base of the second transistor TR2 is bypassed to the ground through the first transistor TR1 and becomes relatively lower than the emitter potential. TR2).

Accordingly, the current of the power supply terminal Vcc flows through the load 202 described above, and this current continues through the second transistor TR2 and the resistor R3 even though the switch 200a is opened. It is applied to the base of TR1 to maintain the first transistor TR1 in a conductive state, and is bypassed to ground through the resistor R4 and the first transistor TR1, whereby a current loop is formed and the load 202 ) Will work.

As described above, when the load 202 looks at the respective potentials in the operating state, the collector potential of the first transistor TR1 configured in the switching means 201 is almost zero potential, and the resistance R3 and The connection point of the resistor R4, that is, the potential of the node G, receives the zero potential which is the collector potential of the first transistor TR1.

The emitter potential of the second transistor TR2 of the switching means 201 becomes the collector potential of the first transistor TR1 minus the voltage between the base and emitter of the second transistor TR2.

In this way, when the user presses and releases the movable terminal S0 of the switch 200a to its fixed terminal S1 side while the load 202 is operating, the zero potential of the condenser C1 in the conduction state of the switch 200a is increased. A voltage of 0.6 V across the resistor R3 of the switching means 201, ie, the node G, flows through the switch 200a to the condenser C1, and thus the first transistor of the switching means 201. Near zero potential is applied to the base of TR1, whereby the first transistor TR1 is momentarily shut off.

That is, in the above, the capacitor C1 serves to drop the potential of the node G at the moment when the movable terminal S0 of the switch 200a is connected to the fixed terminal S1 thereof.

When the first transistor TR1 of the switching means 201 is cut off, the high potential is applied to the base of the second transistor TR2, so that the second transistor TR2 is also cut off to stop the operation of the load 202. At this time, the voltage is again charged in the capacitor C1 of the bias voltage control means 200.

By repeatedly pressing the switch 200a in this manner, the conduction and interruption are repeated sequentially, and the current flows through the first and second transistors TR1 and TR2 to control the operation of the load 202. Done.

As described in detail above, according to the present invention, instead of using a method of flowing a current through opening and closing of a mechanical switch, the conduction and interruption are repeated by repeatedly pressing the switch with one touch using a switching element, By flowing the flow through the switching element, wear of the contact due to the flow of current is prevented, and thus the role as a switch is semi-permanently effected.

Claims (3)

A bias voltage control means for sequentially charging and receiving a power supply voltage output through a load through a resistor, and sequentially outputting a bias voltage of switching on or switching off as the switch is repeatedly turned on for user selection; A first switching in which the bias voltages of the switching-on and switching-offs supplied by the on of the switch in the voltage control means are connected and interrupted through the resistance and the resistance of the ground, thereby making the bias voltage control means into the discharged state and the charged state; An element and a second switching element which is connected in accordance with the conduction of the first switching element and causes a current to flow to the connection point of the resistance and the resistance of the ground after passing through the load. The one-touch electronic switch according to claim 1, wherein the bias voltage control means is constituted by a capacitor which increases or decreases the base potential of the first switching element in accordance with the switching on. The one-touch electronic switch according to claim 1, wherein the switch of the bias voltage control means is configured to operate in one touch.