The membrane switch panel is a switch made by printing a contact circuit with a conductive paste on a flexible polycarbonate or polyester film. It is a type of contact switch. The membrane switch panel is a flat type, multi-layer combination and sealed structure. It is an assembly of an electronic complete machine operating system that integrates key switches, panel function markings, reading display transparent windows, indicator light window holes and circuits.
1. Good sealing performance
Because the membrane switch panel is an integral sealing structure, the contacts of the switch are not eroded by harmful gases and are not easy to be oxidized; it has the characteristics of waterproof and dustproof, so it is more suitable for use in various harsh environments.
2. Rich color and beautiful appearance
The membrane switch panel can be personalized according to the user's design concept, in the design of the color picture, and in the decoration effect, it shows the general characteristics of the beauty of the material, the beauty of the decoration and the beauty of the craftsmanship.
3. Small size, light weight and reliable structure
The membrane switch panel can be placed and combined into a membrane keyboard in planning, and its installation density is high, and it is a sealed sheet structure composed of multiple layers of membranes. The connection lines and lead-out lines between all switches are screen printed. One-time completion, the total thickness is 1~3mm, so the volume is reduced, the quality is reduced, and the reliability is improved.
4. Reduce the supporting cost of mechanical and electrical products
The traditional mechanical switch needs welding during installation, and even needs to cooperate to fix the bracket; while the installation of the membrane switch panel is a sticker type, it can be firmly pasted on the surface of the whole machine just by removing the adhesive tape, and its lead outlet is pierced. Into the socket of the rear circuit of the whole machine, the circuit can be connected in an instant.
5. Durability
The life of the membrane switch panel can generally reach more than one million times. The reason for such a long life is that the action of the switch is only realized by the straight direction of the elastic film; although the elastic film has undergone millions of times of activity, However, because the creep range is very small, only 0.1~0.3mm (that is, the switching stroke), and the rationality of material selection is far from reaching the yield limit of the film, the film material can withstand more than one million times of life. On the other hand, the contacts of the switch are in direct contact with very little wear; the screen-printed contacts can form a satisfactory thickness, and a layer of conductive carbon is printed on the silver paste contacts. , In order to achieve the purpose of high wear resistance and self-lubrication, the life of the membrane switch is more than ten times higher than that of the mechanical contact switch.
The keys on the thin-film circuit of the thin-film panel use different colors to indicate the orientation, shape and size of the key body, which are common in the initial stage of the thin-film circuit.
Three-dimensional film circuit: Generally, the keys on the film circuit only use color to express the position, shape and size of the key body. In this way, the accuracy of the operation can only be recognized by the operator's vision, because there is no appropriate response information to indicate whether the finger is pressed on the useful scale of the switch to make the switch move, thus affecting the confidence in the monitoring of the whole machine and the speed of operation. A thin-film circuit that makes the key body slightly bulge slightly higher than the switch to form a three-dimensional shape is called a three-dimensional key switch.
The three-dimensional key can not only accurately specify the size of the key body, improve the recognition speed, make the operator's touch more sensitive, but also enhance the decorative effect of the product appearance. The manufacture of the three-dimensional key must be done in the design stage of the switch. Arrangement, with process holes, in order to have accurate positioning when the mold is pressed, the height of its three-dimensional protrusions should generally not exceed twice the thickness of the substrate. The bumps of the raised film lines can be varied in a number of ways for a beautiful product appearance.
Membrane switch and membrane panel are a new control system of electronic complete machine products that are popular internationally in recent years, which integrates decoration and functionality. , Membrane switch panels have been widely used in intelligent electronic measuring instruments, medical instruments, computer control, CNC machine tools, electronic weighing instruments, post and telecommunications, copiers, refrigerators, microwave ovens, electric fans, washing machines, electronic game machines and other industrial and household Electrical products.
1. Beautiful and novel appearance;
2. Small size, thin thickness and light weight are more conducive to the development of notebook computer keyboards in the direction of lightness, thinness, shortness, smallness and high intelligence.
3. Moisture-proof, dust-proof, oil-proof and harmful gas, strong sealing, acid and alkali resistance and shock resistance.
4. Long service life and bending resistance.
The quality of the membrane switch panel is determined by the five major production factors in the production process: personnel, equipment, materials, methods, and environment. Since domestic membrane switch manufacturers vary greatly in scale and grade, the emphasis on the quality of membrane switch panels and the actual implementation efforts are also different.
Due to the limitation of financial strength, for most small and medium-sized membrane switch factories, it is highly feasible to close the raw materials of membrane switches and reduce the factors of quality accidents from the source. In the production process of membrane switch panel, the raw materials are mainly film, ink and solvent. The overall quality control principle: select the appropriate film and structure according to the specific requirements of the customer or the characteristics of the film switch and post-processing; after selecting the material structure, select the appropriate ink according to different films, and match the corresponding Solvent; avoid overpackaging or shoddy charging.
There are many kinds of films on the market now, but the most commonly used panel printing films are PVC, PC, and PET. As far as printing is concerned, the most important thing is of course the surface treatment effect of the film, whether it is damp or not. The corona effect is time-sensitive. If it is placed for a long time, the corona effect may drop too much to meet the printing requirements; avoid reverse the printing film surface.
There are many factors that affect the printing quality of membrane switch panels. How to better grasp the quality of membrane switches, membrane switch panel factories have their own management methods. The quality control of raw materials is the most basic and critical process requirement in the production process of membrane switch panels. It is difficult to imagine that unqualified or inappropriate raw materials can ensure the production of membrane switches with qualified quality. Therefore, membrane switch manufacturers must be durable, Effectively control the quality of raw materials.
The structure of the membrane switch panel is relatively simple. It is formed by laminating the decoration panel, the upper and lower electrode films, and the isolation layer. The entire exterior is flat and flat and thin as a whole. The screen-printed membrane switch mainly includes panel printing and wiring. Print in two parts.
Pre-press preparation According to production practice, the pre-press preparation of membrane switch panel screen printing has a great influence on the production efficiency and the quality of printed products. The number of defective products should be paid attention to. The pre-press preparation work mainly includes the following aspects:
1. Clean up the surrounding sanitation, pay attention to the temperature and humidity of the workshop, and can be equipped with air conditioning and dehumidification equipment if possible. These are all related to the cleanliness and overprinting accuracy of the panel.
2. Fully understand the characteristics of substrates and printing materials, and understand the standard size and shape of the panel.
3. Select the appropriate scraper according to the characteristics of the substrate.
4. Check whether the printed materials and products are wrong, and check whether the surface treatment of the printed materials and the elimination of static electricity meet the requirements.
Membrane switch panel is a very widely used accessory in electronic products. Membrane switches are classified as contact switches, which are usually switches made by printing contact circuits with conductive paste on flexible polycarbonate or polyester films. Electronic panels, etc.
Films can be mainly divided into touch switches, tact switches, tact buttons, electronic panels, etc. The structure of the membrane switch is relatively simple. It is formed by laminating the decoration panel, the upper and lower electrode films, and the isolation layer. The entire surface is flat and the whole is flat and thin. The screen printing membrane switch mainly includes panel printing and circuit printing. In two parts, in order to ensure the quality of panel printing, the following aspects should be paid attention to.
Pre-press preparation According to production practice, the pre-press preparation of membrane switch panel screen printing has a great impact on the production efficiency and the quality of printed products. The number of defective products should be paid attention to.
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