Membrane switch sounds quite professional, in fact, the common is the panel type keys, the name is more familiar, a lot of equipment consoles use membrane switch, which is widely used in electronic communications, electronic measurement of instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances and other fields, the next for you to introduce the principle of the membrane switch and characteristics of the relevant knowledge.
Membrane switch principle
Membrane switch is a certain flexibility of the insulating material layer composed of a multi-layer structure (plane) type (non-locking) key switch, integrated circuit. Key, indicating components, instrument panels and other functions as a whole. Membrane switch action only by the vertical direction of the elastic film bouncing to achieve, the elastic film, although after millions of times of creep, and creep when the amplitude is very small, only 0.1-0.3MM, coupled with the reasonableness of the choice of materials, so the film material can withstand more than one million times of the large life without deformation, these are the decision of the durability of the membrane switch.
Membrane switches have a beautiful appearance, long service life, simple structure, easy to install, good feel, occupy a small area and other characteristics,
and are widely used in all walks of life, from small home appliances to high-tech products, and slowly replace some of the touch switch market, the market occupies a great share and advantage.Types of Membrane Switch
First, flexible membrane switch
Flexible membrane switch mask layer, isolation layer, circuit layer are composed of a variety of different properties of the flexible film.
The circuit layer of the flexible membrane switch is a polyester film (PET) with good electrical properties as the carrier of the switch circuit graphics. Due to the polyester film has the nature of the impact, so that this membrane switch has good insulation, heat resistance, folding resistance and high resilience.
Second, hard membrane switch
Hard membrane switch refers to the switch's graphics and line production in the universal printed circuit laminate. Characterized by a stable process, low resistance, can be directly welded on its back side of the circuit in certain components. In the case of a small area, the rigid laminating layer can be omitted. Rigid membrane switch are generally used as a guide metal guide labyrinth contacts, and thus feel better. But in the whole machine is not as convenient as the soft membrane switch, often need to be welded and through the line will lead out the lead.
Third, three-dimensional membrane switch
Membrane switch on the key, usually using different colors to indicate the location of the key body, shape and size,
in the initial stage of the membrane switch is more common. Three-dimensional membrane switch key body slightly raised, slightly above the panel, constituting a three-dimensional shape of the membrane switch, known as the three-dimensional key switch. Three-dimensional key can accurately give the key body range, improve the speed of recognition, so that the operator's sense of touch sensitive, but also enhance the product appearance of the decorative effect.Membrane switch features
First, good durability
The service life of the membrane switch can generally reach more than one million times. As the switch action is only realized by the vertical direction of the elastic film bouncing, although after a million times of creep, but because of the creep is very small, only 0.1-0.3mm, coupled with the reasonableness of the choice of materials, far from reaching the yield limit of the film, so the film material can withstand more than a million times the use of the film without deformation.
Second, good sealing
Membrane switch is the overall structure of the seal, not easy to oxidize, has a good waterproof, dustproof, oil-proof, anti-hazardous gas erosion characteristics, suitable for use in a variety of harsh environments.
Third, light weight, small size
Membrane switches can be arranged in the design of the combination of membrane keyboard, and multi-layer film combination of sealed sheet type structure, all the connecting lines between the switch and the lead line is screen printing one-time completion,
the total thickness of 1-3mm between the volume is reduced, the quality of the reduction, the reliability is also improved. Reliability is also improved.Fourth, colorful
Membrane switch appearance is beautiful, colorful, according to the user's design ideas, decorative effect reflects the beauty of the material, the beauty of the decoration, the beauty of the process of the comprehensive characteristics.
Fifth, reduce the supporting costs of electromechanical products
Membrane switch installation is pasted, just remove the backing paper, can be firmly affixed to the surface of the entire machine, its lead outlet into the rear of the entire machine circuit of the socket, you can turn on the circuit. This saves labor and material, and reduces the cost of supporting the whole machine.
Membrane switch installation method
First, the membrane switch needs to be pasted on the surface clean, the surface is required to be pasted on the surface of the flat, no rust, no oil, no dust.
Second, put the membrane switch to the need to paste the place to compare the size, to see if the location is accurate.
Third, strip the centrifugal paper at the bottom of the membrane switch from the edge about 10mm.
Fourth, put the membrane switch to the corresponding position to stick a part of it, slowly tear off the remaining centrifugal paper, and then stick it to the corresponding position.
Fifth, the paste should be completed at one time, can not repeat the operation, tearing angle can not exceed 15 degrees. When you try to press the feel, be sure to put flat on the desktop and then press, can not hold in the hands of the empty press, so as not to affect the service life of the membrane switch.
Membrane switch installation method
First, the membrane switch needs to be attached to the surface clean, the surface is required to be attached to the flat, no rust, no oil, no dust.
Second, put the membrane switch to the need to paste the place to compare the size, to see if the location is accurate.
Third, strip the centrifugal paper at the bottom of the membrane switch from the edge about 10mm.
Fourth, put the membrane switch to the corresponding position to stick a part of it, slowly tear off the remaining centrifugal paper, and then stick it to the corresponding position.
Fifth, the paste should be completed at one time, can not repeat the operation, tearing angle can not exceed 15 degrees. When trying to press the feel, be sure to put flat on the desktop and then press, can not hold in the hands of the empty press, so as not to affect the service life of the membrane switch.