| 主权项 |
1. A storage case comprising:
a frame made of a synthetic resin and including a bottom plate, left and right side plates, a rear plate, an open front side, and an open upper side; a top plate made of a synthetic resin, wherein the top plate covers the upper side of the frame; and a drawer made of a synthetic resin and including a bottom plate, a front plate, left and right side plates, a rear plate, and an open upper opening, wherein the drawer is movable through the open front side of the frame; wherein the bottom plate of the frame includes grooved rails and guide walls, the grooved rails are respectively formed at left and right sides of an inner surface of the bottom plate, the guide walls are respectively formed at left and right sides of the inner surface of the bottom plate outward from the corresponding grooved rails so that outer surfaces of the left and right side plates of the drawer are slidable along the guide walls; and the bottom plate of the drawer includes guide projections formed at rear left and right sides of an outer surface of the bottom plate, and the guide projections are respectively fitted to the left and right grooved rails so that the guide projections are movable along the left and right grooved rails, wherein each of the grooved rails includes a groove surface, the groove surface includes pits, a middle portion, a peak, a slope, and a horizontal portion, the pits are respectively located at a front side and a rear side of the grooved rails in a moving direction of the drawer, the middle portion extends along the groove surface between the pit at the front side and the pit at the rear side, the peak is located in the middle portion, the slope extends along the groove surface from the pit at the front side to the peak and ascends from the front side toward the rear side, the horizontal portion extends along the groove surface from the peak to the pit at the rear side, when the drawer is pushed into the frame, each of the guide projections moves out of the pit at the front side in the groove surface of the corresponding one of the groove rails, ascends along the slope, passes by the peak, moves horizontally along the horizontal portion, and then falls into the pit at the rear side, and when the drawer is pulled out of the frame, each of the guide projections moves out of the pit at the rear side in the groove surface of the corresponding one of the groove rails, moves horizontally along the horizontal portion, passes by the peak, descends along the slope, and then falls into the pit at the front side. |
