Patent ID: 9036077
Filing Date: 2015-05-19
Classification: G02B,G03B

Abstract:
1. A lens barrel comprising: a lens group having at least two lenses; a lens holding frame configured to hold the lens group; a holding cylinder configured to hold the lens holding frame movably in an optical axis direction of the lens group; a forward-backward moving mechanism configured to move the lens holding frame in forward and backward directions with respect to the holding cylinder; first to third guide shafts fixedly provided in the holding cylinder so as to surround the lens holding frame and each extend in the optical axis direction; and a biasing mechanism held by the lens holding frame between the first guide shaft and the lens holding frame and configured to bias the lens holding frame in a direction so as to separate the lens holding frame from the first guide shaft toward the second and third guide shafts on a plane orthogonal to the optical axis direction, wherein the second and third guide shafts are each free of a biasing mechanism between the respective guide shaft and the lens holding frame.