| 摘要 |
A vehicle seat belt retractor with a tension-reducing mechanism comprises a main winding spring biasing a toothed wheel in the belt-winding direction and an auxiliary winding spring biasing the reel shaft relative to the wheel. The positions of a stopper pawl biased by an over-center spring are controlled by a clutch plate associated with the wheel such that the wheel is stopped by engagement by the pawl after the belt is pulled out and done up, the slack is allowed to be taken up, and the user pulls the belt out slightly, thereby establishing the reduced-tension state. The pawl is released from the wheel to restore the winding bias of the main spring by a releasing clutch ring if more than slightly less than one revolution of the reel is required to take up slack in the belt after the reduced-tension state is attained.
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