Patent ID: 6788475
Filing Date: 2004-09-07
Classification: G02B

Abstract:
A lens barrel comprising:a stationary barrel, an outer ring, an inner ring, a cam ring and a movable lens frame, arranged in that order from outermost side, wherein the axes thereof coincide with a common optical axis; said outer ring being guided linearly in the optical axis direction by said stationary barrel; said inner ring being linearly guided in the optical axis direction by said outer ring via a linear guide key and a linear guide groove provided on one and the other of said inner ring and said outer ring, respectively; and said cam ring being rotatable to move said movable lens frame in the optical axis direction; and a lens barrier mechanism having an aperture positioned in front of said movable lens frame, said lens barrier mechanism being provided on a front opening of said inner ring, for opening and closing said aperture.