A locking portion ( 13 ) is provided to lock an open/close cover ( 15 ) to a fuse unit ( 5 ) or a cover main body ( 9 ) assembled to the fuse unit ( 5 ) in a state where the open/close cover ( 15 ) is closed. The open/close cover ( 15 ) is openably and closably connected to the cover main body ( 9 ), and includes first and second side walls ( 17, 19 ) respectively on both end sides in an orthogonal direction orthogonal to an opening/closing direction and extending in the opening/closing direction. The locking portion ( 13 ) includes a locking protrusion ( 21 ) provided in the first side wall ( 17 ) deformable in the orthogonal direction, and a mating locking protrusion ( 23 ) provided in the fuse unit ( 5 ) or the cover main body ( 9 ) and facing the first side wall ( 17 ).
1. A fuse box comprising:
a fuse unit configured to house a fuse element provided with a fuse body for interrupting a circuit in response to an overcurrent;
a cover body configured to cover the fuse unit, the cover body including a cover main body assembled to the fuse unit and an open/close cover openably and closably connected to the cover main body via a hinge; and
a locking portion configured to lock the open/close cover to the fuse unit or the cover main body in a state where the open/close cover is closed, wherein
the open/close cover includes side walls respectively on both end sides thereof in an orthogonal direction orthogonal to an opening/closing direction of the open/close cover, the side walls extending in the opening/closing direction,
a first side wall of the side walls is deformable in the orthogonal direction,
the locking portion includes
a locking protrusion provided in the first side wall, and
a mating locking protrusion provided in the fuse unit or the cover main body and facing the first side wall,
the locking protrusion and the mating locking protrusion are locked to and released from each other by deformation of the first side wall, and
the fuse unit or the cover main body facing a second side wall of the side walls has a restriction wall configured to be in contact with the second side wall during locking of the locking protrusion to the mating locking protrusion.