| 摘要 |
<p>In a retractor reel assembly for a vehicle safety-belt, a locking mechanism is provided to lock the shaft. The locking mechanism includes a disc which normally rotates with the shaft, but which rotates relative to the shaft in response to a predetermined deceleration of the vehicle or in response to rapid withdrawal of the belt. Two locking elements (13,14) are carried on the disc, each defining a recess (21,22) which engages a radial projection (2,3) on the shaft (1) and at least one of the locking elements (13,14) carries a tooth (23) adapted to engage a toothed locking ring (24) which surrounds the locking elements. The locking elements are guided to effect a predetermined motion when the disc rotates relative to the shaft, this motion consisting of an initial linear motion, with the locking elements moving in opposed parallel directions, and a final motion in which the tooth or teeth move with a component tangential to the adjacent locking ring to bring the tooth or teeth into engagement with the locking ring. <IMAGE></p> |
