Patent ID: 9715980
Date: 2017-07-25
CPC Classifications: H01H

Claim:
1. A breaker comprising: a fixed piece having a fixed contact; a movable piece having a movable contact at a front end portion and causing the movable contact to be held in pressured contact with the fixed contact; a thermally responsive element actuating the movable piece upon deformation in response to a change in temperature such that the movable contact is separated away from the fixed contact; a positive characteristic thermistor enabling the movable piece and the fixed piece to be electrically connected via the thermally responsive element when the movable contact is separated from the fixed contact; and a resin case accommodating the fixed piece, the movable piece, and the thermally responsive element, wherein the resin case comprises a recessed portion depressed from a peripheral portion on an outer bottom surface, and wherein the fixed piece comprises a withdrawal portion withdrawing from the recessed portion of the resin case in a longer side direction of the resin case and a shorter side direction of the resin case in a bottom view and embedded in the resin case; and wherein the withdrawal portion has an end edge formed into a circular-arc shape along an end edge of the positive characteristic thermistor and located closest to the recessed portion, and an area between the recessed portion and the end edge of the withdrawal portion is filled with resin material of the resin case.