| 摘要 |
PURPOSE: Provided are loose-leaf retaining mechanism, which is also called ring binder mechanism, and a ring binder incorporating such a mechanism. CONSTITUTION: The ring binder mechanism includes a housing member supporting a pivotable lower structure to which a plurality of half-ring members are mounted, wherein the housing member includes a plurality of tab members extending generally towards a longitudinal axis of the housing member, and wherein the lower structure is movable between a first configuration in which the half-ring members are closed and a second configuration in which said half-ring members are open.
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