Micro switches are used in actuators for electrical over limit protection, position limit, torque detection, signal output, etc. It is important to note that different functions and usage are different when using them. As electrical over limit protection, valves do not touch the micro switch during normal opening and closing processes. If the micro switch is touched during valve angle calibration, This may cause the actuator to fail to reach the originally calibrated closed and open positions during normal operation. The reason is that during angle calibration, the actuator has a light load and generates a certain amount of overshoot. If the reached position is set to the closed and open positions, during normal operation of the equipment, due to increased load and touching the microswitch, the motor has been powered off and relies on inertia to never reach that position, The computer board will detect that it is not in place and continue to drive the motor. If it exceeds the time limit, it will report a locked rotor. This is why it is repeatedly emphasized that as a microswitch for electrical overload protection, it must not be touched during equipment operation.

The micro switch


A microswitch is a contact mechanism with small contact spacing and quick action mechanism, which uses a specified stroke and force for switch action. It is covered by a shell and has a driving rod on the outside. Because the contact spacing between the switches is relatively small, it is called a microswitch, also known as a sensitive switch or quick action switch. A fast switch actuated by pressure. Used for door switches, etc. in anti-theft systems.

There are various types of microswitches, with hundreds or thousands of internal structures. There are ordinary, small, and ultra small types according to body integration; According to protective performance, there are waterproof, dustproof, and explosion-proof types; According to the division form, there are single connection type, double connection type, and multi connection type. There is also a strong disconnect microswitch (when the spring of the switch is not working, external force can also disconnect the switch); According to the breaking capacity, there are ordinary type, direct current type, micro current type, and high current type.

Microswitches are widely used for automatic control and protection in equipment that requires frequent circuit switching, and are widely used in electronic equipment, instruments and meters, mines, power systems, household appliances, electrical equipment, as well as military fields such as aerospace, aviation, ships, missiles, tanks, etc. They have been widely used in these fields. Although small, switches play an irreplaceable role.

The micro switch

It can also be applied in computer mice, car mouses, automotive electronics, communication equipment, military products, testing instruments, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, float equipment accessories, medical equipment, building automation, electric tools and general electrical and radio equipment, 24-hour timers, etc.


How do we choose the manufacturer of microswitches when microswitches are so widely used? Firstly, there is a certain factory production scale; Secondly, choose high-quality products and make a clear and crisp sound when pressing them; Thirdly, to have a long lifespan; Fourthly, there must be safety certification; Fifth: Those with after-sales guarantee. The Zhongyang switch meets your needs!