| 摘要 |
PROBLEM TO BE SOLVED: To perform variable power operation and focusing operation by a single power source by slidably providing a gear member having two gears on the output shaft of a single motor and moving it between a position where one gear is meshed with a gear connected to a driving member for variable power driving which makes a photographing lens perform the variable power operation and a position where the other gear is meshed with a gear connected to a driving member for focusing driving which makes the lens perform the focusing operation by the sliding of the gear. SOLUTION: A variable power driving transmitting gear 24b is formed at the leading end of a zoom cam barrel 211 having cam holes 24C and 24d which make a front group lens 21 and a rear group lens 22 advance and retreat in an optical axis direction to perform variable power operation, and a focusing driving transmitting gear 30b is formed at the leading end of a focusing gear 30 which makes the front group lens 21 advance and retreat in the optical axis direction to perform focusing operation. The gear member 36 slidably provided on the output shaft 35a of the motor 35 is equipped with a variable power driving gear 36a and a focusing driving gear 36b. The combination of the meshing gears 24b, 36a, 30b and 36b is changed by the sliding of the gear, so that the variable power operation and the focusing operation are switched. |
