Arc blocking type snap-in relay

Abstract

Disclosed in the present invention is an arc-blocking clapper relay, comprising a base, a static contact point assembly and a moving contact point assembly being arranged above the base, the static contact point assembly comprising a static contact point, the moving contact point assembly comprising a moving spring piece positioned at the front of the static contact point and a moving contact point fixed on the moving spring piece; an insulating frame is fixed on the base, the insulating frame comprising a front part positioned at the front of the moving contact point, side parts positioned at the left and right sides of the moving contact point, and a bottom part arranged at the lower side of the moving contact point, the static contact point having a static contact point contact surface matched with the moving contact point, the end of the bottom part of the insulating frame furthest from the front part and the end of the side parts of the insulating frame furthest from the front part all being arranged at the back of the the static contact point contact surface, the height position of the upper edge of the front part of the insulating frame and the height position of the upper edge of the side parts of the insulating frame being higher than the height position of the upper edge of the moving contact point and the upper edge of the static contact point.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a snap-in relay. Background technique [0002] The snap-in relay includes a base made of plastic material, a moving contact assembly and a static contact assembly. The moving contact assembly includes a moving reed, an armature and a plastic insulating block between the moving reed and the armature. The moving reed moves with the armature. Operation, the base is fixed with a load lead-out pin, the upper part of the load lead-out pin is located on the upper side of the base and is fixed with a static contact, the movable contact is located at the lower end of the movable reed, and the joint of the dynamic and static contact is located on the lower side of the plastic insulating block. The base and plastic fixing block of the existing snap-in relay are easy to be ignited by the arc generated by the passive static contact breaking, which can only reach about 450V, which limits the us...

AI Technical Summary

Problems solved by technology

The base and plastic fixing block of the existing snap-in relay are easy to be ignited by the arc generated by the passive static contact breaking, which can only reach about 450V, which limits the use of the existing snap-in relay and cannot be used in the high-voltage field ( The DC voltage is higher than 450V), and the snap-in relays used in new energy vehicles and buses have the risk of being burned

[0003] Both the static contact and the moving contact have a contact surface that cooperates with each other. Due to production and assembly problems, it is difficult to ensure that the contact surfaces of the two static contacts are on the same plane. There is a gap of 0.1mm between the contact surfaces of the two static contacts. There is a gap between the left and right, so when the dynamic and static contacts are in contact, one group of dynamic and static contacts often contacts, and there is still a gap between the moving and static contacts of the other group of moving and static contacts, and the current cannot be conducted normally, so that There is a situation where the relay cannot respond, and the reliability of the relay is poor; it will also happen that both sets of moving and static contacts are engaged, but the pressure exerted by the two moving contacts on their corresponding static contacts is different, and the pressure is greater The wear of the static contact is greater, which will shorten the service life of the relay

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