Bistable switch

The invention discloses a bistable switch. The switch comprises a shell, wherein a coil rack, two binding posts and a contact bridge are arranged in the shell, the coil rack is provided with a hollowsleeve and a coil winding, a static iron core and a movable iron core are arranged in the hollow sleeve, and a guide rod is fixedly connected between the contact bridge and the movable iron core; thecoil frame is provided with a steady-state assembly used for keeping the attraction or release state of the movable iron core and the static iron core. The steady-state assembly comprises a reset spring, a pressure spring used for abutting against the contact bridge, and a permanent magnet used for enhancing the electromagnetic attraction of the movable iron core. The switch is simple in structure, has dual stable states of stable conduction and stable disconnection, does not need continuous power supply of a coil, does not emit heat, guarantees dynamic balance between the internal temperatureof the switch and the exte