Anti-short-circuit membrane switch

Abstract

The invention discloses an anti-short-circuit membrane switch, which comprises a sampling detection unit, a short-circuit protection unit, a data processing unit and a data transmission unit. The sampling detection unit is used for detecting the voltage change of the circuit, judging the working condition of the circuit and providing data for the data processing unit. The short-circuit protectionunit adopts a short-circuit protection circuit of a soft drop gate voltage, soft turn-off and working frequency reduction protection technology by detecting an overcurrent protection principle of IGBTcollector voltage. The data processing unit is used for carrying out data storage processing on the detected voltage signals and then further transmitting the voltage signals to the data transmissionunit. The data transmission unit is used for wirelessly transmitting and exchanging node data. Short-circuit protection of the membrane switch is achieved, the working condition of the circuit is detected and judged through sampling signals, the switch is protected through the circuit, and the working continuity of the switch is guaranteed.

Description

technical field [0001] The invention relates to an anti-short circuit membrane switch and belongs to the field of switches. Background technique [0002] Membrane switch is an operating system that integrates button functions, indicating elements, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer and lower circuit. It is a light touch normally open switch. Under normal circumstances, the upper and lower contacts of the membrane switch are in an open state. When the membrane switch is pressed, the contact of the upper circuit deforms downward, and is in contact with the plate of the lower circuit. After the finger is released, the contact of the upper circuit bounces back, the circuit is disconnected, and the circuit triggers a signal. [0003] In the existing products, the buttons will be dented without external force, resulting in the formation of electrical circuits and short circuits, which will cause great hidden dangers for custom...

AI Technical Summary

Problems solved by technology

[0003] The buttons of the existing products will be sunken without external force, which will lead to the formation of electrical circuits and short circuits, which will cause great hidden dangers for customers after installation.

After the current passes through the line, the membrane switch will inhibit the oxidation of the silver paste line, and the resistance value will not become too high. However, when the resistance value rises to the point that the program cannot be measured for a long time, there will be open circuit, short circuit and key press. insensitive question

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