Patent ID: 7225922

Claim:
A case comprising: a containing part operative to contain objects, said containing part comprising a front face, a rear face, at least two side faces and a bottom face which opposes an opening portion, and a lid part provided on said opening portion of said containing part via a hinge part, said lid part operable to open and close said opening portion, wherein a pair of engagable, interlocking portions are positioned closer to corners of said opening portion of the lid part and the containing part than to middle portions of said opening portion of said lid part and said containing part, and wherein said pair of interlocking portions includes a lid part projection engagable with a respective container part projection, and wherein said lid part projection is formed on an inner surface of said lid part, such that said lid part projection projects towards an inside of said lid part, wherein said lid part projection does not have an undercut, the case further comprising locking portions provided in substantially middle portions of each of the side faces of the containing part and the lid part, or adjacent to corners at said rear face of said containing part.