| 摘要 |
A lens barrel includes an optical system having front and rear lens groups; a front lens frame which supports the front lens group; a rear lens frame which supports the rear lens group; a lens frame drive mechanism for driving the front and rear lens frames, and allows the rear lens frame to rotate relative to the front lens frame or move together in the optical axis direction while preventing relative rotation therebetween; a shutter unit having a shutter and a flexible printed wiring board, the shutter unit being relatively rotatable to, and movable together with, the rear lens frame in the optical axis direction; and a shutter unit guide mechanism for linearly guiding the shutter unit in the optical axis direction without rotating the shutter unit regardless of whether the rear lens frame rotates relative to the front lens frame.
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