Overload protection switch

Abstract

The invention discloses an overload protection switch, which comprises a base, cover plates on two sides of the base, a button, a button core, a pair of central terminals, a pair of fixed terminals, dynamic contact pieces arranged on the upper surfaces of the two fixed terminals, dynamic contact arranged at the end parts of the two dynamic contact pieces and static contacts corresponding to the two dynamic contacts, wherein the button and the button core are arranged at the upper opening of the base; the pair of central terminals and the pair of fixed terminals are arranged on two sides of thebottom plate of the base; two extending ends of the two dynamic contact pieces are embedded in a square hole on one end of a dynamic spring piece which is in a curved shape; the other end of the dynamic spring piece is arranged on the bottom plate of the base by bolts; the inner sides of the two dynamic contact pieces are provided with rectangular grooves respectively; sliding blocks are arrangedbetween the two dynamic contact pieces through the matching between notches and the rectangular grooves; and a draw hook is arranged between each sliding block and the button core. The overload protection switch has the advantages that as the sliding blocks and the draw hooks are positioned in the center of the base, the button bears uniform force and the switch operates reliably when the switchbears overcurrent.

Description

technical field [0001] The invention relates to a switch device for turning on or breaking off a circuit, in particular to a power switch with an overload protection function. Background technique [0002] The traditional overload protection switch includes a base, a pair of central terminals and a pair of fixed terminals arranged on both sides of the bottom plate of the base. The upper surfaces of the two fixed terminals located in the bottom plate of the base are respectively provided with movable contacts. The ends are respectively provided with movable contacts, and the movable contacts are usually made of memory metal which will be deformed when heated. Embedded in the small square hole at one end of the moving reed, the moving reed is curved, the other end of the moving reed is set on the base plate through screws, and the outer sides of the two moving contacts are respectively provided with pull hooks, and the lower ends of the pull hooks are embedded The upper end o...

AI Technical Summary

Problems solved by technology

During the working process of this kind of overload protection switch, there will always be errors in the shape and size of the two hooks distributed on both sides of the base, which will lead to unbalanced force on both sides of the button when the switch is actuated, and unstable movements may occur when taking off. Phenomenon

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