About push button switch

Push button switch has a variety of structures, can be divided into ordinary press stud type, mushroom head type, self-locking type, since the reset type, rotary type handle, with light, belt light symbols and key type, etc., [1] has a single toggle, double toggle, three buttons and different combinations, usually adopts modular structure, by the touch button cap, reset spring, bridge head and shell, etc, often in composite, a pair of normally closed contacts and normally open contacts, some product can through multiple components in series to increase contact pairs.There is also a self-hold button, which can be pressed to maintain the closed position automatically, and can only be turned on when the power is off.

Button switch can start, stop, forward and reverse turn, speed change and interlock basic control.Usually each button switch has two pairs of contacts.Each pair of contacts consists of a normally open contact and a normally closed contact.When the button is pressed, two pairs of contacts move at the same time, the normally closed contact is broken and the normally open contact is closed.

In order to indicate the function of each button and avoid wrong operation, button caps are usually made into different colors to show the difference, and their colors include red, green, black, yellow, blue, white and so on.For example, red means stop button, green means start button, etc.The main parameters, type, mounting hole size, contact number and current capacity of the button switch are detailed in the product specification