Patent ID: 6369962
Filing Date: 2002-04-09
Classification: G02B

Abstract:
A zoom lens barrel comprising:a first cylindrical member having first and second grooves on an inner peripheral surface thereof, said first and second grooves having different profiles, wherein said first and second grooves intersect each other; a first moving member which is provided with a first radial projection which is fitted in the first groove, said first moving member being movable relative to the first cylindrical member in accordance with the profile of the first groove; and a second moving member which is provided with a second radial projection which is fitted in the second groove, said second moving member being movable relative to the first cylindrical member in accordance the profile of the second groove; wherein the shapes of the first groove and the first radial projection and the shapes of the second groove and the second radial projection are such that the second radial projection cannot be fitted in the first groove and that the first radial projection cannot be fitted in the second groove.