| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily perform alignment of a cover with respect to a case.SOLUTION: A damper gear 1 has a drive mechanism 9 of a buffle plate 7 housed in a body case 4 that is formed by assembling a lower cover 5 and a cover 6 to each other. On an outer periphery of a peripheral wall 51, surrounding the drive mechanism 9, of the lower case 5, engagement grooves 56A to 56D are provided along the direction of assembling the lower case 5 and the cover 6. The cover 6 is provided with engagement pieces 66A to 66D for being engaged with the engagement grooves 56A to 56D. The engagement pieces 66A to 66D are engaged with corresponding positioning grooves 56A to 56D from the assembling direction so that the lower case 5 and the cover 6 can be assembled.</p> |
