Patent ID: 7170020

Claim:
A circuit breaker comprising: a main body case having a front end section with an attaching surface, and a rear end section with an attaching surface, terminals with screws disposed at the front end section and the rear end section, respectively, terminal covers detachably attached to the main body case above the rear end section and the front end section, at least one of said terminal covers being slidable and slidably disposed on one of the attaching surfaces of the front and rear end sections, and at least one snapfit coupling unit disposed between the main body case and the slidable terminal cover for snap-fitting the slidable terminal cover into the main body case, wherein said snap-fit coupling unit includes a claw-shaped fastener provided on a rear side of the main body case at the front or rear end section, and an engaging groove provided in a rear end edge of the slidable terminal cover for engaging the claw-shaped fastener, and wherein said slidable terminal cover further includes release operation surface to be pressed for releasing the claw-shaped fastener from the engaging groove, said release operation surface being formed on an upper rear side of the slidable terminal cover and a side of the engaging groove.