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The membrane switch is a set of key functions, indicating components, instrument panels as one operating system. By the panel, the upper circuit, isolation layer, the lower circuit of four parts. For the light touch on type normally open switch, under normal circumstances the upper and lower contacts of the membrane switch are disconnected. When the membrane switch is pressed, the contact of the upper circuit is deformed downward, and the pole plate of the lower circuit is in contact with the conductor, and after the finger is loosened, the contact of the upper circuit is rebounded back, and the circuit is disconnected, and the circuit triggers a signal. Membrane switch structure is rigorous, beautiful appearance, good sealing. It has the characteristics of moisture-proof and long service life. Widely used in electronic communications, electronic measurement instruments, industrial control, medical equipment, automotive industry, intelligent toys, household appliances and other fields.
The insulating material layer with a certain degree of elasticity is composed of a multilayer structure (flat) type (non-locking) key switch, often called membrane switch. Its beautiful appearance, long service life, simple structure, easy to install, good feel, occupy a small area and other characteristics, and is widely used in all walks of life, from small household appliances to high-tech products, slowly replacing part of the light touch switch market. In the market occupies a great share.
Membrane switch structure: face plate, face plate backing, on the line, the isolation layer (line key, face key)
Lower line and backing layer composition. Face plate layer, upper line layer, lower line layer is transparent film. The main materials used are PC, PET, PVC. mask backing, isolation layer and backing layer material is double-sided tape (commonly known as sandwiches)
Key triggering principle: in the mask is not pressed, the isolation layer of the upper and lower lines to isolate the role of the mask layer is pressed, when the mask layer is pressed, the upper line is pressed and the lower line coincides with the line, so that the line conduction. After the conduction of the line to the external connection instrument (substrate) to signal. The corresponding function is realized. The surface of the substrate must be smooth, rust-free, and cleaned with alcohol or gasoline before mounting.
The life of the membrane switch can generally reach more than 1 million times, the action of the switch only by the vertical direction of the elastic film bouncing to achieve the elastic film, although the elastic film after millions of times of creep, due to the magnitude of the peristalsis is very small. Only 0.1-0.3MM, coupled with the rationality of the material selection, so the film material can withstand more than a million times the life of a large and not deformed, these are the durability of the membrane switch is determined.
Its sealing requirements are strict, but after production, the switch contacts are not subject to the erosion of harmful gases, not easy to oxidize, waterproof, dustproof and oil-proof, suitable for use in a variety of harsh environments. Membrane switches can be arranged in the design of the whole set into a membrane keyboard, set the density of the multi-layer film combined into a sealed lamellar structure, all the switches between the connecting lines and lead wires are screen printing is completed at once. The total thickness is 1-3MM, which greatly reduces the volume. The quality is light and reliable. Compared with the traditional mechanical switch, it is easy and simple to install. Only need to gently paste type, remove the backing paper, you can fix the surface of the whole machine, insert the lead outlet into the socket of the rear circuit of the whole machine, instantly connect the circuit, complete the use of the whole product. In the shape of the design, according to the user's design ideas, in the color pattern to reflect the personalized in the decorative effect of the material and the production process of the beauty.
Today, every transformation of society, represents this stage and a new era of products out, such as the 21st century, I think this is the best era of computer and new industrial development, in this period of time many many new products were born, they are used in all areas of society, if not a professional, perhaps you do not understand the hard work behind these products, but as long as you are a member of the era, you have the obligation to be a member of the community, you have the obligation to be a member of the community, you have the obligation to be a member of the community. A member of the times, you have the obligation to understand, I do not know the principle of the above membrane switch, do you have to understand it?
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