How to judge good or bad by touching the switch

What is a light touch switch? In fact, light touch means a short stroke and a light touch. Simply put, it is a switch that can be turned on instantly when you press it. The touch switch is also called the key switch. It has the advantages of good hand feel, accurate operating force error, and small contact resistance. It can be seen everywhere in life, such as remote controls, microwave ovens, air conditioners, water heaters, etc. You can also learn about light Basically pay attention to common sense when using tact switches. Since tact switches are often used in life, how to judge the quality of tact switches?

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Tact switch physical map

　　 Method 1: Look at the size of the touch switch.

　　The contact is the metal contact point that can make and break the circuit. Generally speaking, the larger the contact of the tact switch, the better. But it is best not to exceed half of the area of ​​the touch switch, otherwise it is easy to get stuck.

　　Method 2: Look at the contact material of the tact switch.

　　 Contact materials usually include brass, pure silver, silver cadmium alloy and silver nickel alloy. Brass contacts are relatively poor, prone to sparks, and have a short service life. The sterling silver contacts are soft, not only easy to deform after a long time of use, but sterling silver is also easy to oxidize, resulting in poor performance. Although silver-cadmium alloy contacts are better, they are less prone to sparks, and have a longer service life, but the fusion of cadmium and silver is not ideal, and metal particles are prone to form on the surface of the contacts, which may adversely affect the use. Compared with the other three materials, silver-nickel alloy is the best one. It has the advantages of hard texture, not easy to oxidize, good electrical conductivity, and long service life.

　　Method 3: Look at the shell material of the tact switch.

　　 The better tact switches on the market now usually use PC materials. The advantages of heat resistance, impact resistance and high strength of PC materials meet the needs of tact switches. In order to reduce the cost of the poorer tact switches, polyester materials are used in the base, so that the heat resistance of the tact switches will decrease and the service life will be shortened.

　　 The above are three ways to judge the quality of the touch switch. Tact switches are very common in life. Many industries need to use tact switches. It has a very wide range of applications. Therefore, it is best for everyone to learn more about the knowledge of tact switches. Touch the switch, you can choose according to the above three methods, mastering these three methods can avoid the embarrassing situation of being confused and not understanding anything.