Toggle switch is a manual control switch, is mainly used for on-off control circuit AC and DC power, small volume, convenient operation, an electronic device commonly used in the switch. 

The operating has two and three positions. Three positions does not turn while there is a positioning. Meanwhile, the kind of the connected circuit is greater. The handle type of toggle switch is variety, such as a metal handle, the plastic handle, flat bar handle, the lock lever handle and so on. Rod handle lock button applicable to the dangerous operation situations. And "Unlock promotion" type of the handle, a spring applied thereon, with a screw nose end milling. The operator must first lift the handle button, then push another location, in order to ensure safe operation.