CN202395746U

CN202395746U - Touch switch with two contact electrodes

Info

Publication number: CN202395746U
Application number: CN2012200001833U
Authority: CN
Inventors: 丁希庆; 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-01
Filing date: 2012-01-01
Publication date: 2012-08-22
Anticipated expiration: 2022-01-01

Abstract

The utility model relates to a touch switch with two touch electrodes, comprising a 12V direct current power supply, an on touch electrode MO1, an off touch electrode MO2, a logic circuit, and a high level signal amplifying and implementing circuit. The mode of two input ends and four NAND gates integrated circuit IC1 selects CD4011. The touch switch with two touch electrodes is a device utilizing the electrical mode to replace the mechanical switch, and can control the work state of the circuit by slightly touch the metal electrode. The touch switch with two touch electrodes overcomes the defects that the mechanical switch has large volume, strong touch and contact force and low switching speed; the contact is easy to generate the spark; and the mechanical switch cannot prevent shaking and is easy to be abraded. The output circuit of the touch switch with two touch electrodes not only can drive the direct current relay, but also can be used as the pre-stage circuit for driving the light, electric and silicon controlled circuits.

Description

Soft-touch control with two touch electrodes

Technical field

The utility model belongs to electronic technology and control technology field, is the soft-touch control that has two touch electrodes about a kind of.

Background technology

The shortcoming of mechanical switch is: big by touch, switch speed is slow, the contact be prone to produce spark, anti-tremble easy to wear and volume big.In order to overcome existing machinery formula switch in the defective that use to exist aspect instrument and the automation control, it is necessary that a kind of soft-touch control of universal electronics mode is made in research.

The described soft-touch control with two touch electrodes of the utility model can well overcome some defectives that mechanical switch exists.It is to utilize the electronics mode to replace a kind of device of mechanical switch, through lightly with the finger touch electrode can control circuit operating state.The described soft-touch control with two touch electrodes of the utility model overcomes mechanical switch and has defectives such as volume is big, big by touch, switch speed is low, the contact is prone to produce spark, not anti-shake, easy to wear.Output circuit also can be used for directly driving control circuits such as light, electricity, controllable silicon except that driving relay.

Below specify the described soft-touch control with two touch electrodes of the utility model related relevant technologies content in implementation process.

The utility model content

Goal of the invention and beneficial effect: the soft-touch control with two touch electrodes is to utilize the electronics mode to replace a kind of device of mechanical switch, through touching the operating state that metal electrode can control circuit lightly.The described soft-touch control with two touch electrodes of the utility model has overcome mechanical switch and has had defectives such as volume is big, big by touch, switch speed is low, the contact is prone to produce spark, not anti-shake, easy to wear.The core parts of this soft-touch control adopt CMOS integrated circuit CD4011, and output circuit also can be used as front stage circuits and is used to drive circuit such as light, electricity, SCR control except that driving direct current relay.

The circuit working principle: its core parts of soft-touch control with two touch electrodes are one two input, four NAND gate ICs 1.Because of the CMOS integrated circuit has a very faint level signal is may command, for the high sensitivity touch operation provides convenience.9 pin, 13 pin and the circuit ground GND of two inputs, four NAND gate ICs 1 is connected to the "on" and "off" that touches sheet metal respectively.Logic state is received circuit anode VCC through resistance R 1 and resistance R 2; The resistance of these two resistance is 9M Ω; The resistance of human body skin is more much lower than 9.1M Ω usually, so finger touch can change the level output state of two inputs, four NAND gate ICs 1.For driving high-power electric appliance work, the high level of two inputs, four NAND gate ICs, 1 output, the work of high level signal process PNP transistor VT1 amplification rear drive relay J.

Technical scheme: have the soft-touch control of two touch electrodes, be made up of 12V DC power supply, " opening " touch electrode MO1 and " pass " touch electrode MO2, logical circuit, high level signal amplification and executive circuit, its characteristic comprises:

Logical circuit: form with " pass " touch electrode MO2, resistance R 1 and resistance R 2 by two inputs, four NAND gate ICs 1, " opening " touch electrode MO1; The model of two inputs, four NAND gate ICs 1 adopts CD4011; The end of 9 pin connecting resistance R1 of two inputs, four NAND gate ICs 1 and the end of " opening " touch electrode MO1; The anodal VCC of the other end connection circuit of resistance R 1; The end of 13 pin connecting resistance R2 of two inputs, four NAND gate ICs 1 and the end of " pass " touch electrode MO2, the anodal VCC of the other end connection circuit of resistance R 2, the other end of " opening " touch electrode MO1 and the other end connection circuit ground GND of " pass " touch electrode MO2; The anodal VCC of 14 pin connection circuits of two inputs, four NAND gate ICs 1; 7 pin connection circuit ground GND of two inputs, four NAND gate ICs 1,10 pin of two inputs, four NAND gate ICs 1 link to each other with 12 pin, and 8 pin of two inputs, four NAND gate ICs 1 link to each other with 11 pin;

High level signal amplifies and executive circuit: be made up of PNP transistor VT1, relay J, protection diode D1; The base stage of PNP transistor VT1 connects 8 pin and 11 pin of two inputs, four NAND gate ICs 1; The emitter of PNP transistor VT1 is succeeded an end of electrical equipment J coil and the positive pole of protection diode D1; The anodal VCC of negative pole connection circuit of the other end of relay J coil and protection diode D1, the collector electrode connection circuit ground GND of PNP transistor VT1.

The positive pole of 12V DC power supply links to each other with circuit anode VCC, and the negative pole of 12V DC power supply DC links to each other with circuit ground GND.

Description of drawings

Accompanying drawing 1 is that the utility model provides an embodiment circuit working schematic diagram with two touch electrode soft-touch controls.

Embodiment

The specification requirement of circuit working schematic diagram and description of drawings and the following stated shown in the accompanying drawing 1 is implemented to specifications, can realize the utility model.

The technical parameter of components and parts and selection requirement

IC1 is two inputs, four NAND gate integrated circuits, and model is selected CD4011 for use;

VT1 is the positive-negative-positive silicon transistor, can select models such as 2SC9012 or BC327 for use;

D1 is the protection diode, and model is selected transwitch diode 1N4148;

It is the 1/8W metalfilmresistor that resistance is selected power for use, and the resistance of resistance R 1 and resistance R 2 is 9.1M Ω;

" opening " touch electrode MO1 can make with the sheet metal of size 4mm * 8mm respectively with " pass " touch electrode MO2;

J is the 12V direct current relay, requires the rated power of relay to be no more than 250V/2A, otherwise needs to increase the one-level power amplification circuit;

The operating voltage of the DC power supply of present embodiment is 12V.

The making of circuit and debugging

" open " touch electrode MO1 and " passs " touch electrode MO2 by two lamellules 1mm apart, be separately fixed on the insulation board with rivet.For fear of or alleviate electromagnetic interference; In order to make the soft-touch control can be in that have near the forceful electric power power equipment can reliably working; Require the lead-in wire of " opening " touch electrode MO1 and " pass " touch electrode MO2 to try one's best away from the pin of two inputs, four NAND gate ICs 1; Metal shell is preferably adopted in the circuit board outside, and metal shell should reliably be connected with circuit ground GND;

Two inputs, four NAND gate ICs 1 are the CMOS integrated circuits, and it is easy to damage because of static discharge.When making, must keep human body and circuit board to connect the protection ground wire, should avoid contacting the pin of two inputs, four NAND gate ICs 1 during welding.Can use integrated circuit socket in case of necessity, damaged by static to prevent in welding process two inputs, four NAND gate ICs 1.The pin that two inputs, four NAND gate ICs 1 do not use is connection circuit ground all;

After circuit is connected the 12V DC power supply, touch the moment of " opening " touch electrode MO1 on the circuit board gently, the mechanical sounds in the time of should be able to hearing the direct current relay J switch contact closure on the circuit; If when touching " pass " touch electrode MO2, should be able to hear that direct current relay J switch contact sends the mechanical sounds when discharging.

Claims

1. the soft-touch control with two touch electrodes is made up of 12V DC power supply, " opening " touch electrode MO1 and " pass " touch electrode MO2, logical circuit, high level signal amplification and executive circuit, and its characteristic comprises:

Logical circuit is made up of with " pass " touch electrode MO2, resistance R 1 and resistance R 2 two inputs, four NAND gate ICs 1, " opening " touch electrode MO1; The model of two inputs, four NAND gate ICs 1 adopts CD4011; The end of 9 pin connecting resistance R1 of two inputs, four NAND gate ICs 1 and the end of " opening " touch electrode MO1; The anodal VCC of the other end connection circuit of resistance R 1; The end of 13 pin connecting resistance R2 of two inputs, four NAND gate ICs 1 and the end of " pass " touch electrode MO2, the anodal VCC of the other end connection circuit of resistance R 2, the other end of " opening " touch electrode MO1 and the other end connection circuit ground GND of " pass " touch electrode MO2; The anodal VCC of 14 pin connection circuits of two inputs, four NAND gate ICs 1; 7 pin connection circuit ground GND of two inputs, four NAND gate ICs 1,10 pin of two inputs, four NAND gate ICs 1 link to each other with 12 pin, and 8 pin of two inputs, four NAND gate ICs 1 link to each other with 11 pin;

High level signal amplifies and executive circuit is made up of PNP transistor VT1, relay J, protection diode D1; The base stage of PNP transistor VT1 connects 8 pin and 11 pin of two inputs, four NAND gate ICs 1; The emitter of PNP transistor VT1 is succeeded an end of electrical equipment J coil and the positive pole of protection diode D1; The anodal VCC of negative pole connection circuit of the other end of relay J coil and protection diode D1, the collector electrode connection circuit ground GND of PNP transistor VT1.

2. the soft-touch control with two touch electrodes according to claim 1 is characterized in that: the positive pole of 12V DC power supply links to each other with circuit anode VCC, and the negative pole of 12V DC power supply DC links to each other with circuit ground GND.

3. the soft-touch control with two touch electrodes according to claim 1 is characterized in that: " opening " touch electrode MO1 and " pass " touch electrode MO2 use the sheet metal of size 4mm * 8mm to make respectively.