Explain the core working principle of using an electronic microswitch

Electronic micro switch (also known as sensitive switch, contact switch) is a type of electronic switch with delicate structure and sensitive action. It can quickly turn on and off the circuit by triggering the internal mechanical structure with external force. It is widely used in fields such as home appliances, automobiles, medical equipment, and industrial control. The core of electronic micro switches is to trigger mechanical actions with small external forces to achieve circuit switching

There is a movable spring (contact arm) inside the switch, which forms a key node (normally open or normally closed state) in the circuit with fixed contacts.

When external forces (such as pressing, collision, displacement) are transmitted to the spring through the operating rod (button, lever, etc.), the spring instantly deforms, driving the movable contact to contact (close) or separate (disconnect) from the fixed contact, completing the circuit switching.

After the external force disappears, the spring returns to its original state (normally open/normally closed) by relying on its own elasticity, and the contacts return to their initial state.

Some high-end models integrate electronic components (such as Hall sensors and optoelectronic modules), which are triggered through non-contact methods (such as magnetic induction and light shielding) to reduce mechanical wear and improve lifespan.