Selection of light-touch switches should be distinguished from the contact and structure of the housing.
Release time：2019-01-24 Clicks： Click
When choosing the light touch switch, we should pay attention to the selection from the shell, contact and structure. What is the specific selection method? Let's give you a detailed introduction.
1. Look at the material of the switch housing. The main switch brands in the market generally choose PC materials, PC materials also known as bullet-proof glue, impact resistance, high temperature resistance, non-discoloration characteristics for the control of electrical switches is very important.
2. Look at the contacts. Contact points of conductive parts during the test of light touch switch. At present, there are mainly three kinds of contacts: silver-nickel alloy, silver-cadmium alloy and pure silver. Silver-nickel alloy is an ideal contact material at present. It has good electrical conductivity, hardness and is not easy to oxidize and rust. Silver-cadmium alloy contacts are also good in other aspects, but cadmium belongs to heavy metals. On the one hand, cadmium is harmful to human body, on the other hand, silver fusion is not ideal. Small cadmium particles will form on the contact surface, and arc may be pulled out when conducting electricity. Pure silver is not suitable for contacts. It has good electrical conductivity, but it is soft and easy to oxidize (like silver jewelry will turn black after a long time). Soft texture, more contacts on the switch will deform; oxidation rust, the conductivity will be much worse, rust is easy to heat, it is easy to burn contacts.
3. Look at the switch structure. Nowadays, they are mostly large panels, and their appearance and feel are better than those of thumb. The biggest problem of thumb type is that it is easy to jam, because the moment is relatively short, the switching action is relatively small, the spring is a little bit 微软 or too hard, may cause the switch to jam.