The “nerve endings” of micro switches in industrial control In modern industrial automation systems, micro switches play a crucial role. They are those inconspicuous yet indispensable small components that can precisely control the on and off of current in various devices. Their working principle is based on the lever principle and spring reset mechanism. When external mechanical force acts on the switch button, the lever triggers the closing or opening of internal contacts, thus achieving circuit control. This design is not only simple and reliable but also ensures stable operation of the switch in harsh environments.