Limit switch core structure

Abstract

The invention discloses a core structure of a limit switch. The core structure comprises a bottom casing, a pedestal assembly and a movable assembly; the bottom of the bottom casing is provided with a positioning boss, the two sides of the positioning boss are provided with grooved guide rails respectively, and the surface of the positioning boss is a folding surface; the pedestal assembly is assembled in the bottom casing; the movable assembly is assembled in the pedestal assembly, and comprises a movable rod, an elastic assembly and a moving contact assembly, the elastic assembly comprises main springs, auxiliary springs and a telescopic rod, the auxiliary springs can drive the telescopic rod to be telescopic along the axial direction, the moving contact assembly comprises a moving contact pedestal, and the moving contact pedestal is provided with a through hole through which the telescopic rod can penetrate freely and countersinks for accommodating rolling bodies; and the rolling bodies can move along the grooved guide rails, and the telescopic rod can bear a force to penetrate the moving contact pedestal and make contact with an inclined plane of the positioning boss. The core structure can prevent the switch from a power-off or flickering phenomenon in the switching moment effectively, a sliding body reduce the frictional force generated during movement of the movable assembly, the positions and quantity of normally-open and normally-closed socket connectors can be changed more conveniently, and the switching manner and repetition precision are improved.

Description

technical field [0001] The invention relates to a switch, in particular to a limit switch core structure. Background technique [0002] Most of the existing limit switch cores are in the form of springs or shrapnel. When the switch moving contact piece changes from normally closed contact to normally open contact, it is prone to non-conduction or signal flickering. This phenomenon is likely to cause malfunction of machinery and equipment. If the machine is damaged, it may cause the elevator to stop or start unexpectedly when used on the elevator, and the door cannot be opened when used on the train, and passengers need to evacuate urgently. At present, the solution to this problem is mostly to make the metal movable contact piece movable and add a small spring to position it on the plastic bracket. The action force of the large spring is much greater than the force of the small spring to alleviate this problem. This method brings The problem is that the action parameters of...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The present invention provides a limit switch core structure, in order to solve the problems of signal flickering or power failure, large switch action parameters, large switch accuracy and action parameter tolerance changes in long-term switch applications

Images