| 摘要 |
A jewel case for compact disks has a hinged lid and base held in the closed position by both a breakable tab extending from the base though a mortise in the lid and by a dimple and protrusion forming a detent. Initial opening of the jewel box requires a sufficient force to break the tab. Later openings require less force sufficient only to release the detent. The hinge is formed of pins received in sockets, the pins and sockets being disengageable only when the lid and base are in the open position. The tabs have camming surfaces to permit them to engage the mortise in the lid by deflecting sidewalls of the lid apart.
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