| 摘要 |
<p>A D-ring binder mechanism has a number of rings (12, 14, 16) of either the slanted or non-slanted type. Each ring has a rectilinear part (20). The other part (18) has an arcuate shape, and has a recess (44) in its tip. A protrusion (38) at the tip of the rectilinear part (20) seats in the recess (44). A lateral window (46) in the recessed tip, intersecting the recess (44), enables the protrusion (38) to seat smoothly in the recessed tip notwithstanding the fact that the relative motion between the approaching tips has a large lateral component.</p> |
