As we all know, the seemingly inconspicuous shape of a touch switch implies a huge practical value. When we use the touch switch, we not only experience its better conduction performance, convenient control methods, etc., but also its comfortable button feel. As for the touch switch itself, it has a sophisticated structure, materials, technology and so on. So what affects the comprehensive quality of the touch switch among many factors? Take a look.
For tactile switches, the material and plating of the shrapnel and contacts are critical. The materials and processes of the shrapnel and contacts need to consider not only their electrical performance, but also their service life. In general, in order to reduce the contact resistance between the elastic sheet and the contact, brass or phosphor copper is often used, and the electroplating is silver-plated. If it is encountered with iron pins, silver plating can isolate the SO2 gas in the air and keep it away from corrosive elements; but the anti-corrosion time is short. The use of brass or phosphor bronze leads is even better. Therefore, the material and the thickness of the silver-plated layer and its processing have become the key to determine the overall performance of the pin. In today's market, the excellent silver-plated thickness on the market is more than 0.3 micrometers, and the poor-quality thickness can even be separated by three. Times the gap. The silver plating process also has a wide range of effects. Some pins are directly plated with silver, and some use a multilayer plating process, such as nickel or pre-copper.
Followed by the conduction performance of the tact switch. In the physical structure, the tactile switch relies on the shrapnel and contacts to conduct electricity, so the key to its impact is the structure of the contact point. Generally speaking, the larger the contact surface, the better, and the contact surface of the tactile switch contact is a better choice.