A wide space for loading and unloading the article, and to provide an opening and closing mechanism of the storage case to reduce the backlash.
A substantially plate-shaped lid provided in an opening of the storage case is, when the peripheral edge is moved from the closed position along the inner peripheral surface of the opening to an open position exposing the interior of the storage case, the opening and closing of the lid the slide member 13 located at the lower end of the structure is moved upward, the cam member 15 and the cam link member 16 around the first pivot shaft 14 to rotate a half clockwise with respect to the case 11 together to rotate. Connecting member 31 connected by a second pivot shaft 19 to the cam link member 16 is fixed to the first plate-like member 26 and the first plate-like member 26 connected by a third pivot shaft 32 and push up the lid. Each arcuate groove 21d of the arcuate plate members 21, 22, 24 constituting the rotation guide portion, 22c, is regulated to move around a virtual center axis which is the center position of the arc of 24c, lid virtual center move about the shaft to the open position.
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