A micro switch is a contact mechanism that has a small contact interval and a snap-action mechanism, and uses a specified stroke and a specified force to switch action. It is covered by a shell and has a drive rod outside of it. Because of the comparison of the contact distance of the switch Small, hence the name micro switch, also called sensitive switch.

working principle:

External mechanical force acts on the action reed through transmission elements (press pins, buttons, levers, rollers, etc.). When the action reed is displaced to a critical point, an instantaneous action is generated, so that the moving contact at the end of the action reed and the fixed contact Click to quickly turn on or off.

When the force on the transmission element is removed, the action reed produces a reverse action force. 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 contact distance of the micro switch is small, the action stroke is short, the pressing force is small, and the on-off is rapid. The movement speed of the moving contact has nothing to do with the movement speed of the transmission element.

Switch classification:

There are many types of micro switches. There are hundreds of types of internal structures. According to the volume, they are divided into ordinary, small, and ultra-small; according to the protection performance, there are waterproof, dustproof, and explosion-proof types; according to the breaking type, there are Single type, double type, multi-connected type.

There is also a strong disconnection micro switch (when the reed of the switch does not work, the external force can also make the switch disconnect); according to the 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℃), super high temperature resistant ceramic type (400℃)

The basic type of micro switch is generally without auxiliary pressing attachment, and derives small stroke type and large stroke type. Different auxiliary pressing accessories can be added according to the needs. According to the different pressing accessories added, the switch can be divided into various forms such as button type, reed roller type, lever roller type, short boom type, long boom type, etc.

In terms of size, there are small, super small, super small and so on. Functionally, there is a waterproof type. The most common application is the mouse button.

(1) Small micro switch:

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

(2) Subminiature micro switch

The general size is 19.8 long, 6.4 wide and 10.2 high. It has different functions such as high precision and long life.

(3) Super small micro switch

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

(4) Waterproof type