Push button switch refers to a switch that uses the push button to push the transmission mechanism, make the dynamic contact and static contact on or off, and realize circuit replacement. Push button switch is a kind of master electrical appliance with simple structure and wide application. In the electric automatic control circuit, it is used to send control signals manually to control contactors, relays, electromagnetic starters, etc.

Button switch, also known as control button (button for short), is a low-voltage electrical appliance that can be reset manually and automatically. Buttons are usually used to send start or stop commands in the circuit to control the on and off of the coil current of electromagnetic starters, contactors, relays and other electrical appliances.