Micro switch is a small contact interval and fast moving mechanism, with the specified stroke and the specified force of the switch action contact mechanism, covered by the shell, its external drive rod of a switch, because the switch contact spacing is relatively small, so the name of micro switch, also called sensitive switch。
Classification of microswitches：
There are many kinds of micro switch, internal structure has hundreds of kinds, according to the volume of ordinary type, small, ultra-small; According to the protection performance, there are waterproof, dustproof, explosion-proof type; According to the breaking form, there are single - link, double - link, multi - link type。
Micro switch generally with no auxiliary press accessories as the basic type, and derived from small stroke type, large stroke type. Different auxiliary press accessories can be added according to needs. According to the different auxiliary press switch, it can be divided into push-button type, spring roller type, lever roller type, short boom type, long boom type and other forms。
Working principle of micro switch：
The external mechanical force acts on the action reed through the transmission element (press the pin, button, lever, roller, etc.), and generates instantaneous action when the action reed position moves the critical point, so that the moving contact at the end of the action reed is quickly connected or disconnected from the stationary contact。
When the force on the transmission element is removed, the action reed produces reverse action force. When the reverse travel of the transmission element reaches the action critical point of the reed, the reverse action is completed instantaneously。
Micro switch contact spacing is small, short travel, according to the power is small, quick break. The speed of the moving contact has nothing to do with the speed of the transmission element。
The construction of micro switch：
Microswitch has a small contact interval and quick action mechanism, with the specified stroke and force of the switch action of the contact mechanism, is covered by the shell, the external transmission, and the shape is small。
Application of micro switch：
Micro switch in the need to frequently change the circuit of the equipment for automatic control and safety protection, widely used in electronic equipment, instruments, mines, power systems, household appliances, electrical equipment, as well as aerospace, ships, missiles, tanks and other military fields, the switch is small, but it plays an irreplaceable role。
