Patent ID: 7620306
Filing Date: 2009-11-17
Classification: G02B,G03B

Abstract:
1. A lens barrel having a zooming function, comprising: a cylindrical cam frame which is capable of moving along a direction of an optical axis and which includes an inner peripheral face in which a plurality of cam grooves are formed; and a plurality of lens frames arranged inside the cam frame with a longitudinal direction thereof aligned with that of the cam frame, wherein the plurality of lens frames are formed so as to receive lenses so that the lenses are arranged and mounted in the cam frame with optical axes thereof aligned with each other, and the plurality of lens frames include cam pins capable of being engaged with the plurality of cam grooves, each of the plurality of cam grooves includes in a longitudinal direction thereof: at least one cam groove out of the plurality of cam grooves are formed deeper than the other cam groove, and in the collapse part of the relatively deep cam groove, which is formed deeper than the other cam groove, an intersection intersected with the insertion part of the other cam groove is formed.