1. Definition of micro switch
Micro switch is also called a sensitive switch, which means that the distance between the switch contacts is relatively small, Mainly used in switches in security door systems.
2. Characteristics of micro switch
(1) The size is relatively small, resulting in a relatively large switching current. Therefore, it can be used in some circuits with relatively large currents.
(2) Its durability is better, because the contacts are not easily damaged, it can improve its service life.
(3) When in operation, it has a unique touch and sound, which can be passed through the sound and haptics.
When wiring the micro switch, the method is relatively simple, as long as the following steps are followed, the wiring can be successful.
1. It is necessary to distinguish the different nodes on the micro switch, such as a common point, a closed point, and a normally open point. Once the distinction is made, you can start wiring.
2. The common point is like the neutral line in the socket, so it can be directly connected to the ground line.
3. The normally open point is like an open switch, and the current must pass through this point.
4. The closing point is a node through which the current is disconnected.
5. Connect the corresponding point to the corresponding position.
The principle of micro switch
The micro switch is a contact mechanism with a small contact interval and a snap-action mechanism, and a contact mechanism with a specified stroke and a specified force for switching action. It is covered with a shell and has a drive rod outside.
The external mechanical force acts on the action reed through transmission elements (pressing pins, buttons, levers, rollers, etc.), and when the action reed is displaced to the critical point, an instantaneous action occurs, making the moving contact at the end of the action reed and the fixed contact point to switch on or off quickly.
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 critical point of action of the reed,
The reverse action is completed instantaneously. The contact distance of the micro switch is small, the action stroke is short, the pressing power is small, and the on-off is fast. The action speed of the moving contact has nothing to do with the action speed of the transmission element
Micro switches are small in size, but they are very useful, and can be seen everywhere in our lives. Such as computer mouse, car mouse, automotive electronic products, communication equipment, military products, testing equipment, gas water heaters, gas water heaters, gas stoves, small household appliances, microwave ovens, rice cookers, floating ball equipment, medical equipment, building automation, electric Tools and general electrical and radio equipment, 24-hour timers, etc.
