| 摘要 |
A clutch 61 of a seat belt retractor includes: a latch ring 50 that rotates together with a spindle 161 and has external teeth 50a on an outer peripheral surface thereof; a pawl 49 that has an engagement portion 49c capable of engaging with the external teeth 50a of the latch ring 50 and is capable of rotating such that the engagement portion 49c moves to a first position P1 when a motor 34 is not operative, moves to a second position P2 in which the engagement portion 49c engages with the external teeth 50a of the latch ring when the motor 34 is operated, and moves to a third position P3 on an opposite side of the first position P1 to the second position P2 in a radial direction when a pretensioner 16 is operated; and a return preventing mechanism that is constituted by an off-spring 52 and a projecting portion 53 that prevent the pawl 49 from returning to the first position P1 and the second position P2 after moving to the third position P3. |
