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Micro Switch


Micro Switch

Micro Switches are widely used in electronic equipment, instrumentation, mining, power systems, household appliances, electrical equipment, as well as aerospace, aviation, ships, missiles, etc. in automatic switching and safety protection. Military fields such as tanks have been widely used in the above fields.

Although the Mini Micro Switch is small, it plays an irreplaceable role!

Below we describe how the microswitch works.

Working principle: external mechanical force acts on the action through the transmission component (by pin, button, lever, roller, etc.)

Waterproof Micro Switches

On the reed, when the action reed is displaced to the critical point, an instantaneous action is generated, so that the moving contact at the end of the action reed is quickly turned on or off with the fixed contact.

When the force on the transmission component is removed, the action reed generates a reverse action force, and 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 micro switch has a small contact pitch, a short stroke, a small power, and a fast switching. The speed of the moving contact is independent of the speed of the transmission element.

The micro switch has a small contact spacing and a snap mechanism.

A contact mechanism that performs switching operation with a predetermined stroke and a predetermined force, covered with a casing,

There is a switch with a drive rod on the outside, because the contact spacing of the switch is relatively small, so the name micro switch, also called the sensitive switch.

The electrical text symbol is: SM

2 types of Micro Switch

There are many types of micro switches, and there are hundreds of internal structures.

Micro-switches are divided into: conventional, small, and ultra-small;

Micro-switch protection performance is divided into: waterproof, dustproof, explosion-proof;

The micro-switching type is divided into: single-type, double-connected, and multi-connected.

There is also a strong disconnect micro switch (when the reed of the switch does not work, the external force can also open the switch);

The breaking capacity of the micro switch is divided into: common type, direct current type, micro current type, and large current type. According to the use environment, there are common type, high temperature resistant type (250 ° C), super high temperature resistant ceramic type (400 ° C)

The Metal Micro Switch switch is generally based on the non-auxiliary pressing attachment, and is derived from a small stroke type and a large stroke type.

Different auxiliary pressing accessories can be added as needed. According to different pressing accessories, the button can be divided into button type, reed roller type, lever roller type, short moving arm type and long moving arm type.

The mechanical life of the micro switch varies from 3W to 1000W, generally 10W, 20W, 50W, 100W, 300W, 500W, 800W.

Domestically, the use of beryllium bronze, tin bronze, stainless steel wire material for internal reeds, foreign countries can achieve 1000W times, and the internal reeds are made of rare metal titanium.

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