Micro switches have a contact arrangement with a fine contact distance and a snap-action arrangement for switching action with a regular stroke and a regular force, are covered with a housing and have a drive lever on their outside. Due to the relatively small contact distance of the switch, it is called a micro switch, also known as a live switch.

Microswitch operating principle: External mechanical force is applied to the reed by pressing pins, buttons, levers, rollers and other drive elements. When the action reed is moved to the critical point, instantaneous action occurs, so that the dynamic contact at the end of the action reed and the fixed contact is quickly connected or disconnected. When the force on the drive element is removed, a reverse action force occurs on the action reed. When the reverse travel of the drive element reaches the critical point of the reed action, the reverse action ends instantaneously. Microswitches have a small contact distance, short action stroke, small pressing force, and agile on-off. The action speed of the movable contact has nothing to do with the action speed of the transmission element.

There are many types of microswitches, hundreds of internal structures, according to the volume is divided into general, small and ultra-small. According to the protection function, there are waterproof, dustproof, explosion-proof; According to the type of disconnection, there are single-connection type, double-connection type, multi-connection type. According to the breaking capacity, there are general type, DC type, micro-current type and high-current type. According to the application environment, it can be divided into general type, high temperature resistant type, super high temperature resistant ceramic type.

Microswitches are generally used without auxiliary press attachments as the basic type, and are derived from the small stroke type and large stroke type. Different auxiliary pressing accessories can be added according to the demand. According to the added different pressing accessories, the switch can be divided into various forms, such as button type, reed roller type, lever roller type, short arm type, long arm type, etc.. In terms of scale, there are small, ultra-small, super-small and so on. In terms of function, there are waterproof types. The most common application is the mouse button.

(1) Small microswitch

The general size of 27.8 long, 10.3 wide and 15.9 high. In terms of parameters, it has high capacity and low load.

(2) Ultra Miniature Microswitch

The general size is 19.8 length, 6.4 width and 10.2 height. It has different features such as high precision and long life.

(3) Super Miniature Microswitch

The overall size is 12.8 length, 5.8 width and 6.5 height. This type has an ultra-thin design.

(4) Waterproof type