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SHUYITOP

Zhejiang SHUYI Electric Co. LTD
3 minutes to understand the micro switch

In layman’s terms, a micro switch is a switch that uses a small external force to make or disconnect the static contact piece and the moving contact inside the switch. Because of the small external mechanical force and movement stroke, it is named a micro switch or a sensitive switch.

There are many ways to classify micro switches. Household appliances generally classify micro switches into three categories: normally open, normally closed and conversion type. Before applying external force, the static contact piece and the moving contact piece are connected, then the normal Close the micro switch, otherwise it is a normally open micro switch. The normally open and normally closed micro switches have two terminals.

The transfer switch can control two circuits, one of which will be connected before and after the action of the moving contact piece, and can only control the conduction of one of the circuits. Scenes.

Other types of micro switches are different in structure, but they are common in principle.

Therefore, to judge whether the micro switch is normally open or normally closed, it is only necessary to measure the connection between the two terminals with a multimeter before and after the switch is closed. To judge whether the micro switch is damaged, it is also necessary to use a multimeter to see before and after the switch is closed. If only one channel is turned on, the micro switch is normal, and both channels are on or off, then the micro switch is damaged.

Of course, the structural design and material requirements of the micro switch are very high, and there are many types and application scenarios of the switch. When designing the product, the use environment, electrical performance, operating characteristics, and switch life of the switch should be considered.

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