摘要 |
PROBLEM TO BE SOLVED: To provide a circuit breaker provided with an engaging member which can omit a barrel polishing process, and reduces the cost. SOLUTION: This circuit breaker is provided with a contact device that can be opened/closed, a tripping device which forcibly opens an electrode of the contact device after detecting over-current or leakage current, and an open- close mechanism part which has an open-close operating part, includes a latch constituted of an engaging member obtained by press molding a metallic material and an engaged member supporting the engaging member by engaged with the engaging member, opens/closes the contact by being linked with the open- close operating part, and which forcibly opens the electrode of the contact from the contact close-state irrespective of the presence or absence of a constraint on the contact closing side of the open-close operating part while output of the tripping device acts on the latch. After the engaging surface end part for the engaged member of the engaging member of the latch is worked in a recessed shape by pressing, it is cut-off with press, leaving a sagging part of the shoulder caused by the work of the recess. COPYRIGHT: (C)2004,JPO
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