Device for preventing arc discharge of metal contacts

Abstract

The invention belongs to sensor technologies and relates to a mechanical pressure annunciator or a pressure sensor or the like with metal contacts, in particular to a device for preventing arc discharge of the metal contacts. The device comprises copper foil, springs and a film, wherein the copper foil is composed of an upper copper foil body and a lower copper foil body, the film is clamped by the upper copper foil body and the lower copper foil body, the upper copper foil body and the lower copper foil body are welded with each other and are then closely bonded to the film after being welded so as to guarantee the air impermeability of the interior of the film, and the springs are arranged on the two sides of the lower copper foil body in the film. The device is welded to the metal contacts; when the metal contacts make contact with each other, the copper foil bodies in the film make contact with each other and compress the springs, and then a circuit is closed; when the metal contacts are separated from each other, the copper foil bodies in the film are separated under the action of the springs, and because helium is filled into the film, arc discharge will not occur even a current is too large. The device is simple in structure, small in size, capable of effectively preventing arc discharge and especially suitable for the mechanical pressure annunciator or the pressure sensor.

Description

technical field [0001] The invention belongs to sensor technology, and relates to a mechanical pressure signal device equipped with metal contacts, a pressure sensor, etc., in particular to a device for preventing arcing of metal contacts. Background technique [0002] Pressure signals and pressure sensors can be divided into mechanical, electronic and electromechanical. Traditional metal contacts are used in mechanical pressure signalers and pressure sensors. When the metal contacts disconnect the current, if the circuit voltage is not lower than 10-20V and the current is not less than 80-100mA, the metal contacts will Arcing will occur. The generation of arcing will reduce the service life of the contacts, even burn out the contacts, and may cause major accidents. [0003] Arcing phenomenon widely exists in many industries, such as electrical industry, automobile industry and so on. There are also many measures to prevent arcing, but these methods are difficult to apply...

AI Technical Summary

Problems solved by technology

There are also many measures to prevent arcing, but these methods are difficult to apply to the sensor industry

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