| 摘要 |
When the half rings are opened, the position of the opened half rings is not stable and therefore it was difficult to insert or remove the loose leaf or leaves. A loose leaf binder comprising: base plates (42, 44) arranged side-by-side and supported by a axis with each other; half rings (20, 30) fixed to and supported on the base plates (42, 44) respectively; and a spring normally biasing the base plates (42, 44) toward opened direction, wherein at least one hook (104) is formed on the one base plate (42 or 44) and adapted to engage with an outer edge of the other base plate when the half rings (20, 30) are in the closed position, and at least one lock release groove (108) is formed on the other base plate (44 or 42) and adapted to release the hook (104) from the engagement with the outer edge when the half rings (20, 30) are displaced to the second position where the half rings (20, 30) are not aligned and the hook (104) drops into the lock release groove (108), and wherein the loose leaf binder comprises a coil spring (102) adapted to normally bias the both base plates (42, 44) toward the first position where the half rings (20,30) are aligned with each other and a spring adopted to open the half rings when the lock is released. |
