| 摘要 |
A retractor for seat belt with an alleviating device has a webbing take-up shaft biased in webbing take-up direction and rotatably supported on a base, a gear train comprising a first gear member mounted on the take-up shaft for rotation therewith and a second gear member mesh-engaging the first gear member and rotatably provided on the base, a disc with a cam portion provided for rotation with the second gear member by friction engagement therebetween, and a latch member movable between an engaged position in which it is engaged with a portion integral with the gear train and prevents the rotation of the take-up shaft in the webbing take-up direction and a disengaged position in which it is not engaged with the portion integral with the gear train. The latch member is biased toward the engaged position, and the disc with a cam portion has a first guide portion for guiding the latch member from the engaged position to the disengaged position upon draw-out of webbing, a second guide portion for guiding the latch member to the disengaged position upon take-up of the webbing and for holding the latch member in the disengaged position, and a third guide portion for guiding the latch member held in the second guide portion to the engaged position upon draw-out of the webbing.
|
