Membrane Switch sounds very professional, it is widely used in medical equipment, industrial control, automobile industry, electronic communication, intelligent toys, electronic measuring equipment, household appliances and other fields. The control panel of many devices uses the film Switch, in fact, the popular is the panel Button, the name is familiar, the control panel of many devices uses the film switch, and then introduces the membrane switch and the principle of the film switch.
Membrane switch principle
Membrane Keypad is a multi-layer (planar) type (non-locking) key switch composed of a certain elastic insulating material layer, integrated circuit, key, indicating element, instrument panel and other functions. The movement of the membrane switch is only achieved by the elastic membrane in the vertical direction. The elastic membrane has a creepage of one million times, and the amplitude of the peristaltic movement is very small, only 0.1-0.3 MM, plus the rationality of material selection, so the membrane material It can withstand more than 1 million times of life without deformation, which determines the durability of the membrane switch. Film switch is a multi-layer (flat) type (unlocked) key switch composed of certain elastic insulating material layer, integrated circuit, key, indicator, instrument panel and other functions. The motion of the film switch is realized only by the elastic film in the vertical direction. Elastic film has one million times of creep, and the range of peristaltic movement is very small, only 0.1-0.3MM, coupled with the rationality of material selection, so the film material can withstand more than one million times of life without deformation, which determines the durability of the membrane panel switch.
Membrane switch has beautiful appearance, long service life, simple structure, easy installation, good feel, small size, large footprint and other characteristics, is widely used in all walks of life, from household appliances to high-tech products, slowly replace some touch switch has a huge market share and its advantages.
Membrane switch composition
1. The panel: The panel is the “outer garment” of the entire membrane switch. On the basis of proper arrangement of the keys, different colors, patterns, and key shapes are used to perform the necessary decorative effects on the entire membrane switch. The most important role of the panel layer is to identify and press buttons. Therefore, the materials must have high transparency, high ink adhesion, high elasticity, and anti-folding properties.1. Panel: Panel is the "coat" of the whole film switch. On the basis of reasonable arrangement of keys, different colors, patterns and shapes of keys are used to make necessary decorative effects on the whole membrane switch. The most important role of the panel layer is to recognize and press buttons. Therefore, the material must have high transparency, high ink adhesion, high elasticity, folding resistance.
2. Upper circuit and lower circuit: The upper and lower circuits are the components of the electrical switch of the membrane switch and are also the “off” and “keys” of the switch. Its performance directly affects the performance of the switch electrical apparatus and is mainly printed on the film. A layer of conductive material is formed. The upper and lower circuits act as the two electric shock roles necessary for the switch closure. The thickness is generally within 0.05--0.175mm. The most common is the use of 0.125mm PET.
3.Surface glue, insulation layer, primer: The three-layer structure of the material are double-sided adhesive, due to the different positions in the switch structure and have different names. The three-layer double-sided tapes have different thicknesses depending on their respective layers. This is mainly determined by the thickness of the switch and the operating force of the keys.
