| 摘要 |
PURPOSE:To enable a lever to put a mirror in exactly the same motion with a case wherein a universal joint is provided on the center of gravity of the mirror by allowing the lever to rotate around the center of gravity of the mirror. CONSTITUTION:An axial supporting force detector 11 is provided on the support member 23 fixed on the reverse surface of the mirror 1 and a guide mechanism 9 is fitted in an axially movable state. In this case, the guiding member 9 and a supporting base provided on the lever 7 are coupled rotatably through three spherical bearings 21 and 22 and a link 20 and the prolongation of the link 20 crosses the center (g) of gravity of the mirror 1. Consequently, the lever 7 rotates around the enter (g) of gravity of the mirror 1. Consequently, the same effect with the case wherein the center of gravity of the mirror 1 is supported is obtained without providing any universal joint inside the mirror 1. |
