Anti-theft switch

Abstract

The invention relates to a switch, in particular to an anti-theft switch which comprises a base, an upper cover, a handle, a return spring, a first bus bar assembly and a second bus bar assembly, wherein the handle forms a stepped shaft shape being small on the top and big at the bottom, a large-diameter part of the handle is arranged in the inner cavity of the base and mutually matched with the inner side wall of the base through a longitudinal convex edge and a groove, and a small-diameter part of the handle forms a hexagonal prism shape and penetrates out of the upper cover; the lower end surface of the handle is fixedly provided with a contact spring; and the first bus bar assembly and the second bus bar assembly are respectively embedded in other two opposite grooves on the side wallof the base. In the switch, the extending end of the handle forms the hexagonal prism shape, and the large-diameter part and the inner side wall of the base are matched through the convex edge and the groove and move up and down; on one hand, the structure is convenient for assembling, and on the other hand, the structure has the limit effect on the handle, thereby the invalidation of the anti-theft switch, which is caused by the rotation of the handle, is avoided; meanwhile, due to the sealing effect of the upper cover, the oxidization of contact points of the contact spring with the first bus bar and the second bus bar can be effectively avoided, thereby reducing the influence of external environment.

Description

technical field [0001] The invention relates to a switch, in particular to an anti-theft switch. Background technique [0002] The anti-theft switch is used in the anti-theft device of the supermarket. The anti-theft device is installed on the items in the supermarket. If the items in the supermarket are taken out of the supermarket before the alarm is released, the alarm can be triggered to play an anti-theft function. Wherein the effect of the anti-theft switch is to connect and disconnect the alarm in the circuit control. figure 1 It is a structural schematic diagram of an existing anti-theft switch, such as figure 1 As shown, the existing anti-theft switch is mainly composed of a base, a handle 101 and a spring 105, the handle 101 is arranged in the base and passes through the PCB board 102 of the alarm, the lower end surface of the handle 101 is fixedly provided with a contact reed 104, the PCB The bottom surface of the board 102 is respectively provided with two meta...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problems that the anti-theft switch is difficult to assemble, cannot be correctly alarmed and is greatly affected by the external environment.

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