Trip switches, limit switches, also known as, is a commonly used small current main electrical appliances, it is a position switch. Limit switch is the use of production machinery moving parts make contact action to achieve the collision or breaking the control circuit, to achieve a certain control purposes. Such switches are typically used to limit the mechanical movement of the position or stroke, according to a certain position so that mechanical movement or stroke automatically stop and reverse movement, movement or automatic shifting back and forth motion and so on.

2. The limit switch principle

In actual production, the trip switch installed in the position of pre-arranged, when mounted on the production of mechanical moving parts of the module hit limit switch, the limit switch contact action to achieve circuit switching. Thus, the switch is a trip itinerary based on the position of moving parts and electrical switching circuit, its role is similar to the principle of the button. The difference is: one is manual, the other hit the block by moving parts of the collision. When the stopper hit the block button on the outside of moving parts make contact action, when the moving parts left in the spring, the contact is automatically reset.

3. limit switch principle - Application

Many aspects of application of the limit switch, many electrical appliances which has its presence. That such a simple switch can play what role? It is mainly from the chain of protection. The most common example is their use in washing machines and tape recorders in the. In the dehydration process of the washing machine, its high speed, it is easy to harm people, in order to avoid such accidents in the washing machine door or lid mounted the electrical contacts, once someone opens the door or washing machine lid, automatically the motor off, and even rely on mechanical linkage way, so personal injury.