Patent ID: 6747807
Filing Date: 2004-06-08
Classification: G02B

Abstract:
A lens barrel comprising:a stationary barrel; first, second, and third lens support rings which are guided in a direction of an optical axis via said stationary barrel; and a lens drive ring which is rotated about said optical axis to move each of said first lens support ring, said second lens support ring and said third lens support ring in said optical axis direction; wherein said lens drive ring comprises: a first extending guide portion which is engaged with a fixed extending guide portion formed on said stationary barrel to move said lens drive ring in said optical axis direction upon said lens drive ring being rotated; an engaging portion which is engaged with a guiding portion formed on said first lens support ring, so that said lens drive ring and said first lens support ring are relatively rotatable about said optical axis and integrally movable in said optical axis direction; a second extending guide portion, which is engaged with an extending guide portion formed on said second lens support ring, to move said second lens support ring in said optical axis direction relative to said lens drive ring via rotation of said lens drive ring; and a third extending guide portion which is engaged with an extending guide portion formed on said third lens support ring to move said third lens support ring in said optical axis direction relative to said lens drive ring by said rotation of said lens drive ring.