| 摘要 |
A seat belt reel has a sprocket at each end and a reel shaft extending through elongated slots in a frame to mount the reel for rotation. A rapid unwinding of the belt from the reel imposes a force on the reel and the reel shifts bodily in the direction of belt unwinding. A pawl is pivotally mounted on the frame by a pivot pin and has first and second legs which extend outwardly from the pivot pin and are angularly disposed with respect to each other so as to straddle the sprocket. The bodily shifting movement of the reel carries the sprocket teeth into engagement with one of the pawl legs to stop the rotary movement of the reel. Further bodily shifting movement of the reel pivots the pawl about its pivot pin and thereby carries the other pawl leg into engagement with the sprocket at a point thereon on the other side of the reel shaft.
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