| 摘要 |
<p>A motor-driven seatbelt retractor is provided in which vibrations of a cover can be minimized while minimizing increase in weight. A predetermined number of ribs 11 are provided on a thin plate portion 9a of a cover 9 of a power transmission gear mechanism 8. These ribs 11 extend in parallel with each other from top to bottom (in a vertical direction) of a seatbelt retractor 1. Since rigidity of the cover 9 is increased by these ribs 11, even though vibrations are generated when a motor 7 is driven and the power transmission gear mechanism 8 is operated respectively, the cover 9 is prevented effectively from being vibrated due to the vibrations of these members. Accordingly, generation of noise due to the vibrations of the cover 9 can also be effectively restrained (Fig. 2).</p> |
