A box main body which can smoothly attach cover members each other and prevent generation of abnormal noise is provided. An electric junction box has the box main body including two covers attached to each other and an electric power distribution unit. The box main body has two covers attached to each other. Furthermore, the box main body has a thin portion arranged in the inner wall of the upper cove, and a tapered portion projecting from a bottom surface of the thin portion toward the peripheral wall of the lower cover, and gradually tapering toward the peripheral wall of the lower cover.
1. A box main body having two cover members attached to each other comprising:
a thin portion formed to be recessed as a part of an inner wall of one cover member, the wall being overlapped with a wall of the other cover member; and
a plurality of tapered projecting from a bottom surface of the thin portion of the one cover member toward the wall of the other cover member, and gradually tapering toward the wall of the other cover member,
wherein a tip portion of each of the plurality of tapered portions is cut when the one cover member and the other cover member are attached each other.
2. The box main body according to claim 1 , wherein the thin portion and the tapered portion are arranged in the inner wall of the one cover member, and the wall of the other cover member is sandwiched between the inner wall of the one cover member and an outer wall of the one cover member.
3. An electric junction box comprising:
the box main body described in claim 1 ; and
an electric power distribution unit received in the box main body.
4. An electric junction box comprising:
the box main body described in claim 2 ; and
an electric power distribution unit received in the box main body.