Tap switch when using the switch button can make the switch on, when the hand is released, the switch is disconnected, its internal structure is dependent on the force of the metal shrapnel to achieve the on-off. Due to the small contact resistance, the crisp feel of the touch is obvious, and the high specifications are complete, the light touch switch is widely used in household appliances, such as: video and audio products, digital products, remote controls, communication products, household appliances, security products, toys, computer products, fitness equipment, medical equipment, banknotes, laser pen keys and so on.

First for the pin substrate, the pin substrate of the tap switch is brass or phosphor copper (low grade for iron), in order to reduce the contact resistance, the pin is basically silver plated treatment, for the silver in the air SO2 gas will oxidize, directly affect the weldability and contact resistance of the switch, Therefore, a high-quality light touch switch must first be controlled in place in terms of the substrate plating thickness and silver plating process of the pin. The key influencing factor of conduction reliability is the structure of the contact point, because the function of the touch switch is the contact point and the shrapnel for contact conduction, then the larger the contact surface of the contact point, the better, the contact surface is determined by the structure, there are probably three types of structures on the market, the order is as follows: big bubble (volcanic mouth), "O-type contact", slotted type "2 point contact", flat bubble type "1 point contact". Life and feel are determined by the stroke of the tap switch and the shrapnel, the shorter the stroke, the lighter the sound, the longer the life, the longer the stroke is vice versa, in the case of fixed shrapnel process, mainly depending on the stroke or sound to determine the life of the tap switch; In addition, the key factor that determines the life of the shrapnel is the stamping technology.
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But the touch switch also has its shortcomings, frequent pressing will make the metal shrapnel fatigue lose elasticity and failure. Therefore, most electrical buttons are now directly replaced by conductive rubber or pan switch hardware shrapnel, such as computer keyboards, remote controls and so on. A good touch switch is also very important for the life of the entire product. Like computer keyboards, remote controls, and so on. If it is a poor light touch switch, after frequent pressing will make the metal shrapnel fatigue lose elasticity and failure. Therefore, the selection of the tap switch is very important. The factors affecting the quality of the touch switch are mainly determined by the protection, weldability, conduction reliability, life, feel, production process and installation size of the touch switch. After the accessories ultimately affect the quality is the assembly process, assembly process depends on the production company's management ability, staff quality meaning and quality assurance ability and other factors to determine, different assurance capabilities out of the final product quality must be different, now the market assembly method has manual and machine, because the current automation ability to improve, so each has its advantages and disadvantages: The machine assembly cost is low but the product quality is low, and the manual assembly cost is high but the quality is high.