Membrane switch is an operating system integrating the key function, indicating element, and instrument panel as a whole. It is composed of four parts: panel, upper circuit, isolation layer, and lower circuit. When the membrane switch is pressed, the upper circuit contact deforms downward, and realize the contact with the lower circuit plate and breakover. When you release your finger, the upper circuit contact will bounce back, the circuit is off, and the loop will trigger a signal. Membrane switch is rigorous in structure with nice appearance and good seal. It has the characteristics of anti-humidity and long service life. It is widely used in the field of electronic communications, electronic measurement instrument, industrial control, medical equipment, automotive industry, intelligent toys, household appliances, etc. Membrane switch has many advantages: It is resistant to water, dust, oil and harmful gas erosion, and is stable and reliable in properties. It has small volume, long service life, and convenient installation. Its panel can be washed without damage of characters on it. It also has rich color and elegant appearance. Your product will obtain more distinct features of the time by using the membrane switch. Main types of the membrane switch: With rigid or flexible printed circuit board as substrate, the membrane switch panel is made with plastic (polycarbonate, polyester, etc.) faceplate with colored decorative patterns printed on it. It is installed with keys with hand feeling or not. It is a kind of electronic component integrating switch function with decorative function, and also has a new human-machine interface. Its switching circuit and connection mode of the complete appliance can be finished by welding or plug-in. .
The schematic circuit, lead wire location, interface pitch and wire length of the membrane switch should be indicated. If it is installed to electronic components like LED lights, its positive and negative pole should also be marked. For the membrane switch panel material (PC or PET) and the type of adhesive, our company usually recommends
PET for panel material and 3M adhesive to clients. Membrane switch, also known as touch keyboard, adopts sealing structure composed by multilayer combination of the panel. It is a kind of new electronic component sealing the key switches, panels, tags, symbol display and liner together, and integrating with light, machine and electricity. It can perform tasks of the operating system more reliably.
Generally there is an insulating film between the thin white steel sheet with good elasticity and the lower plate (circuit board copper foil or other metal sheets). When the membrane switch is pressed, the white steel sheet deforms downward, and contacts with the underlying conductive plate. When it is released, the white steel sheet bounces back, and the circuit is disconnected.
