| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens position adjustment mechanism that makes a focus adjustment or zoom adjustment time quick and improves work efficiency.SOLUTION: A lens position adjustment device comprises: a motor (Mf); a deceleration gear (5) that has a first gear (5b) engaging with a gear (2a) provided in a ring (2) moving a lens adjusting a focus or zoom by a rotation onto an optical axis (L), and a second gear (5a) of more teeth than the first gear (5b) and capable of engaging with a pinion (Mfa) provided in an output shaft of the motor (Mf); and a base part (4) that rotatably supports the deceleration gear (5) in a pose in which the deceleration gear (5) is parallel to the optical axis (L). The lens position adjustment device causes the deceleration gear (5) to move in the direction of the optical axis (L), which in turn can selectively obtain a first position where the first gear (5b) engages with the gear (2a) and the second gear (5a) engages with the pinion (Mfa), and a second position where the second gear (5a) is separated from the pinion (Mfa) while the first gear (5b) engages with the gear (2a). |
