| 摘要 |
<p>A joint portion (11) is provided to an upper case (3) of a mirror unit tilting mechanism (1) so as to protrude therefrom. A fitting portion (21) is formed on a pivot plate (5) side so as to correspond to the joint portion (11). The joint portion (11) is formed into a hollow hemisphere shape. A support shaft (13) is provided upright at a center portion of an outer wall (12), and a spherical portion (12b) is formed in the outer wall (12). The fitting portion (21) has a hollow hemisphere dome shape and includes a spherical side wall portion (22) and a ceiling portion (23) which has a wave shape in cross section. The fitting portion (21) is lightly press-fitted to the joint portion (11) through one-touch insertion operation. The fitting portion (21) and the joint portion (11) are swingably connected to each other under a state in which curved surfaces of the spherical portion (12b) and the side wall portion (22) are held in contact with each other.</p> |
