| 摘要 |
PROBLEM TO BE SOLVED: To provide a ring binder mechanism with locking ring members that is easy to manufacture, simple to use, and durable. SOLUTION: The ring binder mechanism for retaining loose-leaf pages comprises a housing and first and second hinge plates supported by the housing for pivoting movement. Ring members are mounted on the hinge plates for movement with the hinge plates between closed and open positions. Hook-shaped formations on free ends of the ring members lock the ring members when closed. The first hinge plate is slidable relative to the second hinge plate in a direction along a longitudinal axis of the housing for disengaging the hook-shaped formations and allowing the ring members to open. An actuator is mounted on the housing for moving the first hinge plate to disengage the hook-shaped formations. In addition, friction buffers are positioned between the hinge plates. COPYRIGHT: (C)2008,JPO&INPIT
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