OPENING AND CLOSING MECHANISM OF CIRCUIT BREAKER

PURPOSE:To facilitate the incorporation work of a trip cross bar into the frame of an opening and closing mechanism. CONSTITUTION:A pivot 3, in which two opposite places on the periphery are made planes parallel with each other, is projected integrally from both sides of a trip cross bar 2, while bearing holes 5, which bear the pivot 3, being made at the frame 1, are opened at the end faces of the frame 1 through slits 6 a little wider than the thickness of each plane of the pivot. The incorporation of the trip cross bar 2 into the frame 1 is performed by getting the pivot 3 through slits 6 at the planes thereby inserting it into the bearing holes 5, and next, rotating the trip cross bar 2 so that the planes may be orthogonal to the slit.