Normally-opened type electronic microswitch
A micro switch, normally open technology, applied in the direction of electronic switches, electrical components, pulse technology, etc., can solve the problem that mechanical micro switches are not easy to be used in combination
Inactive Publication Date: 2012-11-28
GUANGDONG HUSHUN ELECTRICAL APPLIANCE
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Mechanical micro switches are not easy to use in combination with instruments and automatic control circuits
Method used
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[0011] According to attached figure 1 The circuit working principle diagram and accompanying drawings of the normally open electronic micro switch shown, and the connection relationship between the components in each part of the circuit described in the summary of the invention, and the technical parameter requirements of the components described in the implementation mode The present invention can be realized by carrying out implementation.
[0012] Parameters and selection requirements of components
[0013] IC1 is a two-input four-NAND gate circuit, the selected model is CD4011, and the embodiment only uses two of the NAND gate circuits;
[0014] The power of the resistor is 1 / 8W metal film resistor, the resistance value of resistor R1 and resistor R2 are both 100kΩ; the resistance value of resistor R3 is 56Ω;
[0015] The touch electrode can be made of a metal sheet with a size of 10mm×8mm, or the touch electrode CM can be directly etched on the PCB board;
[0016] C1 i...
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The invention discloses a normally-opened type electronic microswitch, which comprises a 9V DC power supply, a touch electrode, an astable trigger circuit and an electric level output terminal. The normally-opened type electronic microswitch is characterized in that the model of a quad 2-input NAND (NOT-AND) gate circuit is CD4011. According to the embodiment, only two NAND circuits are used. The normally-opened type electronic microswitch disclosed by the invention has the advantage of no abrasion of mechanical parts, is particularly used in a humid, powdered or dusty environment which is not suitable for a common mechanical microswitch, and the mechanical microswitch is also not easy to be combined with an instrument and an automatic control circuit. The normally-opened type electronic microswitch disclosed by the invention is a circuit replacing the mechanical microswitch, overcomes the defects of the mechanical microswitch, can control a working state of the circuit by touching the touch electrode on the circuit with a finger, and has an accurate delaying role that the common mechanical microswitch cannot replace; and the electric level output end of the normally-opened type electronic microswitch can directly drive optical, electric or SCR (silicon-controller rectifier) control circuits.
Description
technical field [0001] The invention belongs to the technical field of electronics and automatic control, and relates to a normally-open electronic micro switch. Background technique [0002] The normally-open electronic micro switch of the present invention has no wear of mechanical parts, and is especially used in places where ordinary mechanical micro switches are not suitable, such as in humid or dusty or dusty environments. Mechanical micro switches are not easy to use in combination with instruments and automatic control circuits. The normally open electronic micro switch of the present invention replaces a circuit of the mechanical micro switch with an electronic method, overcomes the defects of the mechanical micro switch, and uses fingers to touch the touch electrodes on the circuit to control the working state of the circuit , and its precise delay function is an inconvenient substitute for ordinary mechanical micro switches. The core component used in the normal...
Claims
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IPC IPC(8): H03K17/96
Inventor 刘昭利
Owner GUANGDONG HUSHUN ELECTRICAL APPLIANCE