| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel unit extending a lens barrel further without increasing the collapsing length of the lens barrel unit.SOLUTION: The lens barrel unit is equipped with: a barrier opening spring; a barrier drive ring 120; a barrier blade 121; and a rectilinear regulation cylinder 115. The barrier opening spring presses both the barrier drive ring 120 and the barrier blade 121, or the barrier drive ring 120 in the rotating direction of either of them. When the lens barrel is collapsed, the barrier drive ring 120 is rotated by the rectilinear regulation cylinder 115, and located in a prescribed phase. |
