With the gradual introduction of all kinds of electronic switches into people’s daily life, from large-scale machine tool manipulators in enterprises to light switch mobile phones in our homes, they play a vital role in our lives. If there is a switch missing. Many, many electrical appliances cannot be used normally. If the light at home is not always on or never, the screen of our mobile phone may never be on. I don’t know how much you know about the tact switch?

The micro switch is a very sensitive electronic switch. It needs a slight touch to switch the circuit, so it is widely used in many fields. The principle and precautions of the micro switch are given below.

Briefly! Principle of micro switch:

The operating principle of the micro switch is that the external mechanical force acts on the moving reed through the transmission element. When the moving reed is displaced to the critical point, an instantaneous action is generated, so that the moving contact at the end of the moving reed and the fixed contact are quickly connected Or disconnect. When the force on the transmission element is removed, the action reed produces a reverse action force. When the reverse stroke of the transmission element reaches the critical point of the action of the reed, the reverse action is instantaneously completed. The contact distance of the micro switch is small, the action stroke is short, the pressing force is small, and the on-off is rapid. The speed of the moving contact has nothing to do with the speed of the transmission element.

Precautions for the use of micro switches:

1. Regarding changes in operating characteristics, even if there is a change in the operating characteristic specification value ±20[%], it should not cause malfunction.

2. Regarding the welding operation, in the case of manual welding, please use the electric temperature with temperature adjustment of 320°C max to complete the operation within 3 seconds, and pay attention not to use the terminal part during the operation Exert force.

3. It is recommended to use low-power circuit type (Au-clad contact) when used under small current and voltage.

Application range of micro switch: Micro switches are currently suitable for a wide range of applications, the most common is the application on the mouse, in addition to all kinds of small household appliances, communication equipment, military red products, testing equipment, power tools, medical equipment, etc. are common Application, but the type of micro switch suitable for different applications is not the same, so choose the appropriate micro switch according to the application.


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