Mechanical switch with contact isolation insurance

Abstract

The invention discloses a mechanical switch with contact isolation insurance, which comprises a push rod, bridge frames connected by elastic pieces and configured on the two sides of the moving direction of the push rod, contact bridges connected to the two bridge frames, moving contacts arranged at the two ends of the contact bridges, and static springs arranged at positions corresponding to themoving contacts. In the two bridge frames, grooves opened outward along the horizontal direction are respectively arranged in the opposite outer sides, and isolation bosses are arranged in outer spaces corresponding to the grooves of the bridge frames. When the bridge frame on the other side moves towards the outside of the other side along the horizontal direction under the action of the other elastic piece due to the breakage of the elastic piece connected with the bridge frame on one side, the isolation boss on the other side enters the groove of the bridge frame on the other side, and themovable contact corresponding to the bridge frame on the other side and the corresponding static spring are isolated from each other through the mutual limitation between the isolation boss and the groove. By adopting the structure, effective isolation between the moving contact and the static spring can be realized when one of the elastic piece breaks.

Description

technical field [0001] The invention relates to the technical field of switches, in particular to a mechanical switch with contact isolation insurance. Background technique [0002] A mechanical switch is a device that makes contacts break a circuit, make a circuit, or switch a circuit by mechanical operation. A mechanical switch of the prior art, such as Figure 1 to Figure 3 as shown, figure 1 It is a schematic diagram of the state when the normally closed end of the mechanical switch of the prior art is working, figure 2 It is a schematic diagram of the state when the mechanical switch of the prior art normally starts to work, image 3 It is a schematic diagram of the state when the shrapnel of the mechanical switch in the prior art is broken. The mechanical switch includes a housing, two normally closed static springs 101, 102 installed in the housing, two normally closed moving contacts 201, 202, two normally closed Open static spring 301,302, two normally open mov...

AI Technical Summary

Problems solved by technology

However, the isolated contact structure of this kind of mechanical switch needs to separate the normally closed movable contact 201 from the normally closed static spring 101, so the bridges 501, 502 need to slide for a long distance, and the long sliding distance may cause the shrapnel 601 to move from the The bridge frame 501 and the push rod 700 fall off, and the fall of the shrapnel 601 will cause the wedge block of the bridge frame 501 connected to it to fail to realize the isolation between the normally closed movable contact 201 and the normally closed static spring 101, that is, the normally closed static spring cannot be realized. 101-Normally closed movable contact 201-Contact bridge 801-Normally closed movable contact 202-Normally closed static spring 102 The non-conduction of the line affects the normal use of the mechanical switch

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