Patent ID: 7187258

Claim:
A circuit breaker comprising: a movable contact with an elongate shape having a contact at one end for flowing a current therethrough, and the other end rotatably supported with a holder, said movable contact having, near said one end, a recess or protrusion projecting laterally outwardly therefrom, and a protection cover made of only an insulating material for protecting the movable contact from short circuit and discharge, said protection cover having a shape for covering the movable contact and elasticity for tightly holding the movable contact, said protection cover including a pair of side walls for covering side portions of the movable contact, a protrusion or a recess portion formed in the side wall for engaging the recess or protrusion of the movable contact, an elongated recess portion formed in a middle of the side wall to extend upwardly from a lower end thereof, and a first bridging portion connecting the lower ends of the side walls near the elongated recess portion.