| 摘要 |
A hinge structure of a case is provided to join a case body (2) and a lid (3) together in a manner capable of opening, turning, and closing said lid (3). The hinge comprises: the first hinge connectors (4), through which the first shaft holes (5) are drilled and which are disposed at the rear of a case body (2) of a synthetic resin in which to contain a cosmetic material; the second hinge connector (6), through which the second shaft holes (7) are drilled and which is disposed at the rear of a synthetic resin lid (3) that opens or closes said case body (2); and a hinge structure comprising hinge shafts (8) made of a synthetic resin, with each shaft (8) being passed through said first shaft hole (5) and said second shaft hole (7). In this hinge structure, two convex fitting parts (9) with the shape of a short cylinder are disposed so as to project from the end faces of said first hinge connectors (4) that come in abutment with the second hinge connector (6). Furthermore, two concave fitting parts (10) of a U shape are correspondingly disposed on the end faces of said second hinge connector (6) that comes in abutment with the first hinge connectors (4). These concave fitting parts (10) are open to the front side of said lid (3), have the center of curvature that is identical with the center of each second shaft hole (7), and have a curve of the same curvature radius as that of said convex fitting parts (9). This hinge structure prevents a shearing force to act on the hinge shafts (8) and protects the hinge shafts (8) against shearing fracture. <IMAGE> |
