Components of spring relay:

1. Tongue spring

2. Coil

3. Glass tube

4. Skeleton

When there is no magnetic field, the spring in the glass tube maintains its initial state.

Under the action of the magnetic field generated by the electromagnetic coil, the spring inside the tube changes its on or off state due to the magnetic field.

After the electromagnetic coil is powered off, the external magnetic force disappears, and the spring returns to its initial state due to its own elastic force.

A reed relay is a type of relay that controls the connection and disconnection of a load circuit by energizing or de energizing an electromagnetic coil.