| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lens barrel capable of arranging a focus drive unit outside of the lens barrel, performing a zoom drive by a drive cylinder which rotates on a fixed position in an optical axis direction, and driving an optical finder in an interlocking manner with the zoom drive, while achieving reduction in thickness and size. <P>SOLUTION: The lens barrel comprises an optical finder part 13, a first-group lens barrel 31, a second-group lens barrel 32, and a third-group lens holder 43, and a drive ring 46. The drive ring 46 includes a cam mechanism 46b for advancing or retracting an intermediate lens of the optical finder part 13 in the optical axis direction, a gear part 46a engaging with a gear train 67 for transferring drive force of a motor 65 to the drive ring 46, and a cut out portion 46c corresponding to an advancing or retracting range of the third-group lens holder 43. The cut out portion 46c of the drive ring 46 and the gear part 46a are arranged in an overlapping manner in a circumferential direction of the drive ring 46. <P>COPYRIGHT: (C)2012,JPO&INPIT |
