Microswitch is a kind of switch with small contact spacing and quick action mechanism, which uses the specified stroke and specified force to switch. It is covered with a shell and has a driving rod outside. Because the contact spacing of its switch is relatively small, it is called microswitch, also known as smart switch.



working principle:

The external mechanical force acts on the action reed through the transmission elements (press pin, button, lever, roller, etc.). When the action reed moves to the critical point, it will produce instantaneous action, so that the moving contact at the end of the action reed can be quickly connected or disconnected with the fixed contact.

When the force on the transmission element is removed, the action reed generates a reverse action force. When the reverse stroke of the transmission element reaches the action critical point of the reed, the reverse action is completed instantaneously.

The microswitch has small contact spacing, short action stroke, small pressing power and rapid on-off. The action speed of the moving contact has nothing to do with the action speed of the transmission element.



Switch classification:

There are many kinds of micro switches, with hundreds of internal structures. According to volume integration, there are ordinary, small and ultra small ones; According to the protection performance, there are waterproof, dustproof and explosion-proof types; According to the breaking form, there are single connection type, double connection type and multi connection type.



There is also a strong disconnect microswitch (when the reed of the switch does not work, the external force can also disconnect the switch); According to breaking capacity, there are ordinary type, DC type, micro current type and large current type.



According to the use environment, there are ordinary type, high temperature resistant type (250 ℃), ultra high temperature resistant ceramic type (400 ℃)

Microswitches are generally of the basic type without auxiliary pressing accessories, and derive small line programs and large line programs. Different auxiliary pressing accessories can be added as required. According to the different pressing accessories, the switches can be divided into button type, reed roller type, lever roller type, short boom type, long boom type and other forms.



In size, there are small, super small, super small and so on. The function is waterproof. The most common application is the mouse button.

(1) Small microswitch:

The general size is 27.8 long, 10.3 wide and 15.9 high. In terms of parameters, there are different changes such as high capacity and low load.

(2) Subminiature microswitch

The general size is 19.8 in length, 6.4 in width and 10.2 in height. It has different functions of high precision and long service life.

(3) Super small microswitch

The general size is 12.8 in length, 5.8 in width and 6.5 in height. This type has an extra thin design.