| 摘要 |
PURPOSE:To prevent a lens from having a shift in optical axis by preventing the operating force of an operator from being applied directly to a lens holding frame. CONSTITUTION:The focusing lens holding frame 11 which holds a focusing lens 10 is fitted rotatably in a fixed lens barrel 12, slants circumferentially, and has three end surface cams 13a, 13b, and 13c at 120 deg. pitch. Those end surface cams 13a, 13b and 13c abut on pins 14a, 14b, and 14c implanted in the fixed lens barrel 12, and leaf springs 16a, 16b, and 16c fixed to the outer circumference of the focusing lens holding frame 11 with screws 15a, 15b, and 15c engage with projection wall parts 17a, 17b, and 17c of the fixed lens barrel 12 to energize the holding frame 11 in the direction of the optical axis 18 of the focusing lens 10. |
