A self-locking switch is a common type of pushbutton switch, which remains engaged after being pressed once, thus self-locking. Pressing the switch button twice will disconnect it and the button will pop out.

The principle of the self-locking switch is: pressing the button once closes the switch, releasing energy from the spring, maintaining the closed state. Pressing the button twice opens the switch and pops the button out.

The differences between the self-locking switch and the dual-control switch are as follows:

Different Uses. Self-latching switches are commonly used to control the on/off of electrical appliances; dual-control switches are a type of switch that can be controlled at two locations, typically used for lighting control.

Operation Differences: The self-locking switch requires a single press to turn on the appliance, which remains on until pressed again to turn it off; the two-way switch allows for independent on/off control of the appliance.