| 摘要 |
<p>A seat belt retractor with a tension eliminating mechanism comprises a reel on which a webbing is wound up when the reel rotates in one direction, biasing means biasing the reel to rotate in the one direction, a ratchet wheel journaled on a concentric bearing portion formed on the reel, a toothed stopper arm for stopping rotation of the ratchet wheel when engaged with the same, biasing means to bias the stopper arm to move in a direction to be disengaged from the ratchet wheel, an external gear journaled on an eccentric bearing portion formed on the reel, third biasing means to bias the ratchet wheel to rotate in the same direction as the one direction relative to the external gear, an internal gear stationary mounted in the retractor and operatively engaged with the external gear, at least one stud fixed to the external gear, corresponding number of arcuate slot formed in the ratchet wheel to spacedly receive therein the stud, the stud and the slot being such arranged and formed that when the stud is in contact with one longitudinal end of the slot upon engagement of the toothed stopper arm with the ratchet wheel, the external gear becomes fixed so as to be prevented from rotation relative to the internal gear, and an electromagnet for bringing the toothed stopper arm into engagement with the ratchet wheel in response to buckling of the webbing by the passenger.</p> |
