| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a seat belt winding device having a pretensioner capable of reducing the number of parts and assembly man-hour. SOLUTION: A pretensioner cover 9 is formed by die-casting aluminum and is provided with two projections 17a, 17b. On the other hand, a ring gear 18 is provided with two holes 18c, 18d at positions corresponding to the projections 17a, 17b on a side face-on a pretensioner cover 9 side. The projections 17a, 17b are fitted into corresponding holes 18c, 18d, respectively, to hold the ring gear 18 on the pretensioner cover 9. Since the pretensioner cover 9 is formed by die-casting aluminum, the projections 17a, 17b can be formed integrally and easily. Moreover, a cutting force is reduced, and a remaining force can be used to rotate the ring gear 18 by forming the projections 17a, 17b by aluminum.</p> |
