| 摘要 |
<p>A ring binder (10-50) includes a base member (12) supporting a plurality of ring members (14), and an opening mechanism (20) at each end of the base member (12) for opening the plurality of ring members (14), each opening mechanism (20) including lock means to lock the opening mechanisms in its closed position, the base member (12) comprising a rigid upper structure (24) supporting a pivotable lower structure (30) to which the ring members (14) are mounted, wherein at each end of the binder (10-50), the opening mechanism (20) is pivotally supported between the lower structure (30) and the upper structure (24), externally of the lower structure (30), and internally of the upper structure (24).</p> |
