Micro switch is a pressure-actuated switch quickly because of its switch contact spacing is relatively small, hence the name micro-switches, also known as sensitive switch.
Its working principle is: micro switch
Through external mechanical force transmission elements (in terms of sales, buttons, levers, rollers, etc.) will be used to force action on a reed, reed when the action shifted to the critical point produce instantaneous action, so that the end of the movable contact spring action and fixed contacts point fast on or off.
When the drive force on the component removed, the action reed produces reverse action force transmission element reverse stroke when the action reaches a critical point reed, instantaneous reverse action. Micro switch contact spacing is small, short stroke action by small power off quickly. The operating speed of its moving contact element movement speed has nothing to do with the transmission.
A wide variety of micro-switches, there are hundreds of kinds of internal structure, according to the volume fraction of a common type, small, ultra-small; according protection performance points, there are waterproof, dustproof, explosion proof; according to breaking form of points, there Single, double-linked, multi-connection type. Currently there is a strong disconnect the micro switch (when the reed switch does not work when the external force can switch off); according to breaking capacity points, a common type, DC-based, micro-current, large current- . By use of the environment, a common type, high temperature resistant (250 ℃), ultra-high temperature ceramic (400 ℃)
Micro switch is generally no auxiliary press accessories as the basic type, and derive a small line of code, Dahon program. Can be added according to needs of different auxiliary pressing accessories, according to the press to join the different accessories can be divided into push-button switch, reed roller, roller lever, short jib, jib length in various forms.
Micro switch in the frequent need for circuit devices for automatic control and safety protection, etc., are widely used in electronic equipment, instrumentation, mining, power systems, home appliances, electrical equipment, security, office equipment, medical equipment, and aerospace , aviation, ships, missiles, tanks and other military fields, switching is small, but plays an irreplaceable role.
The current domestic market micro switch according to different application requirements, mechanical life of the switch to 1000W with 3W times per second, generally have 10W, 20W, 50W, 100W sub, 300W sub, 500W sub, 800W sub, general domestic use bronze, tin bronze, stainless steel wire as reed, so the domestic market, some of the switches are relatively inexpensive, but can not meet the quality requirements of high-end products, the current Division I imported materials from abroad, in order to achieve the same quality and imported switch.