| 摘要 |
PROBLEM TO BE SOLVED: To prevent a lens from shaking because the lens is turned on a plane where the lens is crossed with an optical axis when moving force is transmitted to the lens frame of the lens moving in an optical axis direction at the time of focusing operation by imparting turning force with center at a guide rod for guiding the movement of the lens frame to the lens frame, and making one part of the lens frame and one part of the lens barrel press-contact with each other by the turning force. SOLUTION: A plane part 11b is formed at the upper end of the lens frame 11 so as to support the base end of a transmission arm 14. A female screw part 14a screwed on a feed screw part 17b formed on the output shaft 17a of a motor 17 is formed at the leading end of the arm 14, and the turning force with center at the guide rod 12 for guiding the movement of the lens frame 11 in the optical axis direction is imparted to the lens frame 11 by properly bending the arm 14 in a state where they are screwed. An abutting surface 16 is formed at a position which is point-symmetric with the rod 12 with respect to the optical axis of the lens frame 1, a receptive surface 15a is formed on the inner peripheral part of the lens barrel 13, and the abutting surface 16 is pressed to the receptive surface 15a by receiving the turning force. |
