| 摘要 |
A pretensioner capable of reducing the size of a device in its entirety. A rack and pinion type pretensioner is installed on the outer side of a second leg plate (18) of a webbing winder (10). The driving mechanism of the pretensioner comprises, as principal components, a piston (116) constructed as a rack bar and a pinion (102). The pinion (102) includes a toothed portion (104) and a clutch portion (106), and is directly connected to a winding shaft. Therfore, as compared with a construction in which an intermediate ge ar is interposed between the pinion (102) and the rack bar, the entire pretensioner can be radially and axially reduced in size. |
