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Membrane switch operating principle

- Apr 17, 2018 -

Membrane switch operating principle

   Membrane switches are an operating system that integrates key functions, indicating elements, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer, and lower circuit.

   When the membrane switch is pressed, the contacts of the upper circuit are deformed downwards and brought into contact with the plates of the lower circuit. After the fingers are released, the upper circuit contacts bounce back, the circuit is disconnected, and the circuit triggers a signal. Membrane switch structure is rigorous, beautiful appearance, good sealing.

    With anti-humid, long life and other characteristics. Membrane switches are widely used in electronic communications, electronic measuring instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances and other fields.

    The basic working principle of the membrane switch is as follows: When the panel is not pressed, the membrane switch is in the normal state, the upper and lower contacts thereof are in an open state, and the isolation layer acts as a barrier to the upper and lower circuits; when the panel is pressed, the upper switch The contacts of the circuit are deformed downwards, reunited with the lower line to make the line conductive, and the turned-on line gives signals to the external connected instrument (substrate) to achieve its corresponding function; when the finger is released, the upper circuit touches The point bounces back, the circuit is disconnected and the circuit triggers a signal.

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