| 摘要 |
PURPOSE:To simplify the structure of the titled mechanism and to reduce the size by forming one of shafts supporting a lens frame as a travel reversible shaft to be optionally moved in an optical axis direction and sliding said shaft to move the lens frame. CONSTITUTION:A fixed shaft 35 is fixed on the upper part of brackets 30a, 30b and a travel reversible shaft 36 is also fitted to the lower part so as to be freely slided. In the same manner, a fixed shaft 37 and a travel reversible shaft 38 are inserted into blackets 31a, 31b respectively. The shaft 36 forwards along the optical shaft at the time of contraction and the shaft 38 backwards along the optical shaft at the time of extension. The lens frames 23, 26 are inserted into the 36 and the fixed shaft 37, and if the shaft 36 is pressed forward, the lens frames 23, 26 can be forwarded along the optical shaft. On the other hand, the lens frames 21, 24 are inserted into the fixed shaft 35 and the shaft 38 and can be backwarded along the optical shaft in accordance with the movement of the shaft 38. |
