Mirror surface angle adjusting mechanism

Abstract

In a mirror surface angle adjusting mechanism, a hemispherical portion of a mirror holder inner is nipped between a predetermined number of ribs of case pivot and a support portion of support pivot with an urging force being acted. When the hemispherical portion is slid with respect to the ribs and the support portion, the mirror holder inner is slid such that a mirror surface angle of mirror held by the mirror holder inner is adjusted. Since the predetermined numbers of ribs have the same thickness, partial dent due to variation of the thickness does not occur at the predetermined number of ribs. Thus, a precision of spherical surface of pivot portion can be ensured. Further, clearances between the ribs serve as a lubricant pool, and the lubricant can be sufficiently filled into the pivot portion. Accordingly, a lack of the lubricant in the pivot portion can be prevented.

Dependencies are inferred from the claim text.