| 摘要 |
A lens barrel with a shutter unit. While the lens barrel is retracted to obtain a collapsed state or advanced to obtain a photographing state, the flexible printed circuit board of the shutter unit is bendable so as to provide a variable length for the rotation of the shutter unit 71 around the rotary axis J 2 parallel with the optical axis J 1 . When the lens barrel is operated in the photographing state, the flexible printed circuit board is foldable so as to provide a variable length for the movement of the shutter unit 71 in the optical axis J 1 . The flexible printed circuit board can support flexibly without twisting and loosening. The lens barrel further includes a restraint member to bring the shutter unit 71 rotating around the central axis and to restrain the rotation of the shutter unit 71.
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