There are many types of button switch structures, which can be divided into common push button type, mushroom head type, self-locking type self-reset type, rotary handle type, with indicator light type, with light symbol type and key type, etc.
with single button, double button, three buttons and combination forms. Generally, it adopts a modular structure, which is composed of button cap, reset spring, bridge contact and shell, etc. It is usually made into a composite type with a pair of normally closed contacts and normally open contacts.
Some products can increase the number of contacts by series connection of multiple elements. There is also a self-holding button, can automatically maintain the closed position after pressing, and can only be opened after power failure.
In order to indicate the function of button and avoid misoperation, the button cap is usually made into different colors to distinguish them, and the colors include red, green, black, yellow, blue, white, etc For example, red indicates the stop button, and green indicates the start button. The main parameters of the button switch, type, mounting hole size, number of contacts and current capacity the contacts.
