CN202210788U

CN202210788U - Electronic type touch switch

Info

Publication number: CN202210788U
Application number: CN201120347764XU
Authority: CN
Inventors: 黄宇嵩
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-16
Filing date: 2011-09-16
Publication date: 2012-05-02
Anticipated expiration: 2021-09-16

Abstract

The utility model relates to an electronic type touch switch, which consists of a 12V DC (Direct Current) power supply, two touch electrodes, a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) logic circuit, a level amplifying and execution circuit and a working state indication circuit. The electronic type touch switch is a device which replaces a mechanical switch by adopting an electronic type, and a user can control the working states of the circuits by slightly touching the electrodes. The electronic type touch switch can overcome various defects existing in the mechanical switch that the volume is large, the touch force is big, the switching speed is low, the spark is easily caused at a contact, the mechanical switch can not prevent shaking and is easy to abrade, etc. The touch switch adopts a CMOS integrated circuit CD4011 as the core component, and an output circuit can be used for driving a relay and can also be used for driving control circuits for light, electricity, controlled silicon and the like.

Description

The electronic type soft-touch control

Technical field

The utility model belongs to the application of electronic technology field, is about a kind of electronic type soft-touch control.

Background technology

The electronic type soft-touch control is widely used aspect electrical equipment, instrument and automation control.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 the many disadvantages that existing machinery formula switch exists, it is necessary that a kind of universal electronic type soft-touch control is made in research.

The described electronic type soft-touch control of the utility model can well overcome the many disadvantages that mechanical switch exists.The electronic type soft-touch control is to utilize the electronics mode to replace a kind of device of mechanical switch, through touching the operating state that touch electrode can control circuit lightly.The described electronic type soft-touch control of the utility model can overcome mechanical switch and have many disadvantages 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 for directly driving control circuits such as light, electricity, controllable silicon except that driving relay.

Below specify the described electronic type soft-touch control of the utility model related relevant technologies content in manufacturing process.

The utility model content

Goal of the invention and beneficial effect: the electronic type soft-touch control is to utilize the electronics mode to replace a kind of device of mechanical switch, through touching the operating state that touch electrode can control circuit lightly.The described electronic type soft-touch control of the utility model can overcome mechanical switch and have various 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 for driving control circuits such as light, electricity, controllable silicon except that driving relay.

Technical characterictic: the electronic type soft-touch control, to form by 12V DC power supply DC, two touch electrodes, CMOS logical circuit, level amplification and executive circuits and operating state indicating circuit, its characteristic comprises:

CMOS logical circuit: form by two inputs, four NAND gate ICs 1, two touch electrode SA1 and SA2, resistance R 1 and resistance R 2; The model of two inputs, four NAND gate ICs 1 is CD4011; The end of 9 pin connecting resistance R1 of two inputs, four NAND gate ICs 1 and the end of touch electrode SA1; The anodal VCC of the other end connection circuit of resistance R 1, the other end connection circuit ground GND of touch electrode SA1, the end of 13 pin connecting resistance R2 of two inputs, four NAND gate ICs 1 and the end of touch electrode SA2; The anodal VCC of the other end connection circuit of resistance R 2; The other end connection circuit ground GND of touch electrode SA2, 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;

Level amplifies and executive circuit: be made up of PNP transistor VT1, relay J, protection diode D1; The base stage of PNP transistor VT1 connects 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 connection features that the composition of other partial circuits and components and parts are mutual

Operating state indicating circuit: form by red light emitting diodes LED and resistance R 3; The negative pole of red light emitting diodes LED connects the emitter of PNP transistor VT1; The end of the anodal connecting resistance R3 of red light emitting diodes LED, the anodal VCC of the other end connection circuit of resistance R 3.

The positive pole of 12V DC power supply DC 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.

The circuit working principle: the circuit diagram of electronic type soft-touch control is very simple, has only used 8 elements, and the core of this circuit is one two input, four NAND gate ICs 1.The CMOS integrated circuit only requires that a very faint electric current is a may command, and the high sensitivity of sort circuit makes touch operation become possibility.9 pin, 13 pin of two inputs, four NAND gate ICs 1 and circuit ground GND are connected to Push And Release respectively and touch sheet metal.Logic state is connected to circuit anode VCC through two resistance R 1 with R2, and these two resistances are big (9M Ω) very.The resistance of skin is more much lower than 9.1M Ω usually, so finger touch can change the output state of two inputs, four NAND gate ICs 1.In order to drive high-power electric appliance, realize the function of switch, the high level of two inputs, four NAND gate ICs, 1 output drives relay J by a PNP transistor VT1 at last.

Description of drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides an electronic type soft-touch control.

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 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 a PNP transistor, and model can be selected models such as 2SC9012 or BC327 for use;

D1 is the protection diode, and model is selected transwitch diode 1N4148; LED is a red light emitting diodes;

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; The resistance of resistance R 3 is 1K Ω;

Two touch electrode SA1 and SA2 can make with the sheet metal of two size 10mm * 10mm respectively;

J is the 12V relay, and contactless power is 250V/2A, and it is 250V/2A that the rated power of relay should not surpass, otherwise needs to increase power one-level amplifying circuit;

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

Make and circuit debugging

Two touch electrode SA1 and SA2, are separately fixed on the insulation board with rivet at a distance of 1mm by two lamellules on the electronic type soft-touch control.For make the electronic type soft-touch control can have forceful electric power power equipment near reliably working; For fear of or alleviate electromagnetic interference; The lead-in wire of two touch electrode SA1 and SA2 is as far as possible away from the pin of two inputs, four NAND gate ICs 1; Metal shell is applied mechanically in suggestion circuit board outside, and metal shell should be connected with circuit ground GND.

IC1 is the CMOS integrated circuit, and it is easy to damage because of static discharge.Should avoid contacting the pin of CMOS IC 1 during welding, when making, must keep human body and circuit board to connect the protection ground wire.Can use the IC socket in case of necessity, to prevent that IC1 is damaged by static in welding process.Attention: the pin that CMOS IC 1 does not use is ground connection all.

Ifs circuit work is undesired, at first answers the check circuit welding whether to have connection error; Secondly whether all outside connections of check circuit are wrong, and any mistake all can cause circuit working not normal; The 3rd is to guarantee that IC1 inserts any pin of back IC1 socket and do not bend, and checks whether other element damages or degradation.

After circuit is connected the 12V DC power supply, touch the moment of the touch electrode SA1 on the circuit board gently, should be able to hear the closed sound of relay J switch contact, red light emitting diodes LED should be lighted simultaneously; If palpate palpate electrode SA2 should be able to hear that the relay J switch contact sends release sound, red light emitting diodes LED should extinguish.

The maximum operating currenbt about 24mA of relay coil when work.

Claims

1. electronic type soft-touch control is made up of 12V DC power supply DC, two touch electrodes, CMOS logical circuit, level amplification and executive circuits and operating state indicating circuit, and its characteristic comprises:

The CMOS logical circuit is made up of two inputs, four NAND gate ICs 1, two touch electrode SA1 and SA2, resistance R 1 and resistance R 2; The model of two inputs, four NAND gate ICs 1 is CD4011; The end of 9 pin connecting resistance R1 of two inputs, four NAND gate ICs 1 and the end of touch electrode SA1; The anodal VCC of the other end connection circuit of resistance R 1, the other end connection circuit ground GND of touch electrode SA1, the end of 13 pin connecting resistance R2 of two inputs, four NAND gate ICs 1 and the end of touch electrode SA2; The anodal VCC of the other end connection circuit of resistance R 2; The other end connection circuit ground GND of touch electrode SA2, 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;

Level amplifies and executive circuit is made up of PNP transistor VT1, relay J, protection diode D1; The base stage of PNP transistor VT1 connects 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. electronic type soft-touch control according to claim 1; It is characterized in that: the operating state indicating circuit is made up of red light emitting diodes LED and resistance R 3; The negative pole of red light emitting diodes LED connects the emitter of PNP transistor VT1; The end of the anodal connecting resistance R3 of red light emitting diodes LED, the anodal VCC of the other end connection circuit of resistance R 3.

3. electronic type soft-touch control according to claim 1 is characterized in that: the positive pole of 12V DC power supply DC 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.