Patent ID: 8424926

Claim:
A mobile telephone comprising: a locking member comprising a locking lug; a lid that can be detached or attached at a first side of the lid to a casing by pivoting of said locking member with respect to the casing, the lid comprising: a passage through which the locking member passes; a first storage space arranged on a second side of the lid opposite the first side of the lid; and a locking piece to which said locking lug of the locking member can freely engage and disengage as a result of pivoting of the locking member, the locking piece being located at an inner periphery of the passage, wherein the locking member has a circular shape and the passage has a circular shape, wherein the locking member has two of the locking lugs and two of the locking pieces, and wherein the two locking lugs are asymmetrical with respect to a pivot axis of the two locking lugs, the locking member including a lock groove at the upper end portion of the locking member and wherein a first line from one of the two locking lugs to the axis of the locking member and a second line from another of the two locking lugs to the axis of the locking member cross at a prescribed angle of inclination.