Patent ID: 8334739
Filing Date: 2012-12-18
Classification: H01H

Abstract:
1. A circuit breaker comprising: a housing; a tripping linkage; and a short circuit self-locking mechanism, said short circuit self-locking mechanism comprising a self-locking mechanism and a reset mechanism comprising a button, said button having a compression spring and a convex block; wherein: said self-locking mechanism comprises: a reed pipe; an electromagnet having a coil and an actuating arm; and a rotating rod having a groove; said self-locking mechanism operates to keep said tripping linkage in a short circuit protection state; said reset mechanism operates to enable said tripping linkage to restore an initial state; said electromagnet and said reed pipe are disposed in said housing, and a lower end of said rotating rod is hinged in said housing; said compression spring is disposed in said button and said button is engaged with said rotating rod; said reed pipe is disposed in the vicinity of an inner lead of said circuit breaker; said electromagnet is disposed in the vicinity of said rotating rod; said coil is serially connected with said reed pipe and then with a power supply input to said circuit breaker; said actuating arm is contacted with an edge of the top of a hinged point of said rotating rod, the other edge of said rotating rod is contacted with an upper portion of said tripping linkage; said groove is disposed on an upper portion of said rotating rod; said convex block is disposed at the lower portion of said button; and when said compression spring in said button is compressed, said convex block at the lower portion of said button is disposed in said groove on the upper portion of said rotating rod.