| 摘要 |
PROBLEM TO BE SOLVED: To provide a mirror surface adjusting mechanism capable of ensuring a spherical surface accuracy of a pivot part and inhibiting a lack of a lubricant at the pivot part. SOLUTION: In the mirror surface adjusting mechanism 10, a semi-spherical part of a mirror holder inner is clamped between a predetermined number of ribs 28 of a case pivot 18 and a support part of a support pivot in the state that an urging force is applied. The mirror holder inner is inclinedly moved by sliding the semi-spherical part against the predetermined number of ribs 28 and the support part. Thereby, an angle of the mirror surface of the mirror retained by the mirror holder inner is adjusted. Here, since a thickness of the predetermined number of ribs 28 is made to a uniform thickness, a failure caused by a thickness deviation is not generated on the predetermined number of ribs 28 and a spherical surface accuracy of the pivot part 22 can be ensured. Since a gap between the ribs 28 is made to a lubricant reservoir 30, the lubricant can be sufficiently stored in the pivot part 22 and a lack of the lubricant at the pivot part 22 can be inhibited.
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