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Working principle of membrane switch

2019-6-14 9:20:51

The membrane switch panel is an operating system integrating key function, indicator element and instrument panel.It is composed of panel, upper circuit, isolation layer and lower circuit.Press the membrane switch to deform the contact of the upper ci…

The membrane switch panel is an operating system integrating key function, indicator element and instrument panel.

It is composed of panel, upper circuit, isolation layer and lower circuit.

Press the membrane switch to deform the contact of the upper circuit and conduct contact with the plate of the lower circuit. When the finger is released, the contact of the upper circuit bounces back, the circuit is disconnected, and the circuit triggers a signal.


The main structure of the membrane switch panel is generally composed of keys and membrane, the thickness of the membrane switch will be controlled in about 0.15mm, if too thin, there is no resilience, the use of the switch is not so sensitive, if the queen mother, press will be very labtful, are not good products.


When choosing the thin film, the switch of plate type tends to choose the slightly higher thickness to ensure the long-term and repeated use of the product.

Another type of panel used in circuit contacts requires a slightly thinner, thinner film only when the diameter of the bubble is compared.


The overall structure design of the film button is very simple, when you get a film panel, you just need to take down the key cover to see the circuit and circuit board of the panel.


When the design of the shape of the button head is relatively large, it is best to choose the thickness of 0.18 mm film, film thickness of this thickness is moderate, has a good rebound effect, can be used frequently, not easy to damage.

If the selected film is not thick enough, it can easily penetrate.

Make membrane switch use insensitive.


Key advantages of membrane switch panel is very much, his work principle and advantage compared to other different types of buttons, it is in a conductive film above the many points of conductive metal welding, each key can be connected with the membrane switch membrane panel key is how to work the circuit, can realize different control effect, membrane panel with a layer of barrier layer, its role is in no one according to the time to do a button and panel, press the processing circuit.

Complete the instructions.


The relevant information

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