Bistable switch

Abstract

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 external environment temperature, can be normally switched on and off especially in an extremely cold severe environment, and is high in reliability; the bistable switch solvesa problem that an automobile cannot be normally started in an extremely cold environment in the industry, and the service life of the switch is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of switches, in particular to a bistable switch. Background technique [0002] The main power switch of the car is generally divided into electromagnetic type and mechanical type. Among them, the electromagnetic type is to connect the electromagnetic coil loop with the control switch, and use the electromagnetic suction to connect the moving contact with the static contact, so as to connect the electrical load of the vehicle to the power supply of the vehicle. Pass. However, the existing electromagnetic power supply main switch only relies on electromagnetic suction to attract the moving contact, so that the moving contact is connected to the static contact, which requires a large electromagnetic attraction. In order to meet the strength requirements of the electromagnetic attraction, a large coil, Large iron core etc. not only waste materials, but also cause problems such as high price and heavy weight of ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a dual stable state with simple structure, stable conduction and stable disconnection, no need for continuous power supply of the coil, the coil does not generate heat, and the dynamic balance between the internal temperature of the switch and the external environment temperature is ensured. Especially in extremely cold and harsh environments, it can be turned on and off normally, solving the problem that cars cannot start normally in extremely cold environments in the industry, and is a bistable switch that effectively improves the service life of the switch

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