| 摘要 |
PURPOSE:To permit positioning of the face in the outer circumferential part of a resin molding with a revolving shaft with high accuracy by bringing the base part of the resin body orthogonal with the plural plane parts thereof into contact with the front face part of a rotating body orthogonal with the revolving thereof, thereby fixing the resin body and the rotating body. CONSTITUTION:This mirror consists of the rotating body 2 having the plane orthogonal with the rotary shaft 6 provided to a motor and the resin body 1 having the plural plane parts provided with metallic reflection films. The base part of the resin body 1 orthogonal with the plural plane parts thereof is brought into contact with the front face of the rotating body 2 orthogonal with the revolving shaft 6 thereof, by which the resin body and the rotating body are fixed. More specifically, a central shaft of high accuracy is not provided to the resin rotating body 2 and the central shaft 6 is set and fixed by means of an assembly jig 11 to the plural plane parts in the outer circumferential part 8 and the base 3 orthogonal with the plural plane parts, by which the positioning and aligning are executed. The positioning of the central shaft and the outer circumferential planes with the high positioning accuracy and inclination accuracy is thereby permitted. |
