| 摘要 |
Clamping means for a strap, adapted to be located between a strap storage location and a strap utilization location, comprises reaction member pivotally mounted on a base member for angular movement about a first axis, a guide member pivotally mounted on a support member fast with the reaction member for angular movement about a second axis positioned between the reaction member and the first pivot axis. Resilient means retains the guide member and the reaction member in respective rest positions in which the strap is freely movable between the guide member and reaction member until the tension applied to the strap exceeds a predetermined level. When the tension in the strap exceeds said predetermined level, angular movement of the guide member causes corresponding angular movement of the reaction member, thereby wrapping the strap round both the reaction member and the guide member so that one layer of the strap is clamped against the reaction member by another layer of the strap. |
