Patent ID: 7719775
Filing Date: 2010-05-18
Classification: G02B

Abstract:
1. A lens barrel comprising: a first and second tube, the first tube movable relative to the second tube by rotation of the second tube; an engaging portion disposed on the second tube; and a barrier driving unit disposed on an object side of the first tube that opens and closes barrier members, the barrier driving unit being forced by a barrier spring, wherein the first tube is relatively moved in an optical axis direction by engaging with the engaging portion, wherein the barrier members are closed when a first interlocking portion, which is arranged on the barrier driving unit, and a second interlocking portion, which is arranged on the second tube, are shifted from a non-interlocking state to an interlocking state, and the barrier members are opened when the first interlocking portion and the second interlocking portion are shifted from the interlocking state to the non-interlocking state, and wherein when the first interlocking portion and the second interlocking portion are in the interlocking state, at least a portion of the first interlocking portion and the engaging portion overlap with each other in the optical axis direction and does not interfere with each other in a radial direction of the second tube.