Position Trigger Relay Hold On-off
Position trigger relay hold on-off
There are many types of button switches, which can be divided into ordinary snap button type, mushroom head type, self-locking type, self-resetting type, rotary handle type, with indicator light type, lighted symbol type and key type, etc., with single button and double Buttons, i buttons and different combinations. Generally, it adopts a water-retaining structure and is composed of a button cap, a return spring, a static contact, a movable contact and a shell, etc. It is usually made into a compound type, and has a pair of normally closed contacts and normally open contacts, and some products can pass through. The series connection of multiple elements increases the number of contact pairs. There is also a self-contained button that automatically holds the closed position when pressed, and can be turned on only after the power is turned off.
When the button is not pressed, the movable contact is connected with the upper stationary contact. The pair of contacts is called a normally closed contact. At this point, the movable contact is disconnected from the following static contact. The pair of contacts is called a normally open contact: the button is pressed, the normally closed contact is open, the normally open contact is closed, and the button is released. Restore the original working state under the action of the return spring.