Patent ID: 7701313

Claim:
A case for a circuit breaker having a monolithic door, the case comprising: a case base portion; a terminal block portion that provides a common platform for plural types of terminals; a door engaged with the case base portion in monolithic form so that it may be operable to a closed position for closing the case or an opened position for installing a selected terminal of the plural types of terminals; and a hinge portion that pivotably connects the door to the case base portion; and an engaging device disposed at an engaged portion where the case base portion and the door are engaged or disengaged, so as to maintain a closed state of the door by the engagement between the case base portion and the door, the engaging device comprising: an engaging groove portion which is disposed at one of the case base portion and the door; and an engaging protrusion which is disposed at the other of the case base portion and the door, wherein the engaging protrusion is inserted into the engaging groove to maintain the door in the closed state.