Patent ID: 7746584
Filing Date: 2010-06-29
Classification: G02B

Abstract:
1. A lens barrel that supports an imaging optical system, the lens barrel comprising: a stationary frame; a drive frame supported by the stationary frame to be rotatable around an optical axis of the imaging optical system and movable in a straight-movement direction along the optical axis in response to a drive force inputted in the rotational direction around the optical axis; a first cam frame supported by the drive frame to be movable in the straight-movement direction relative to the drive frame in response to the drive force; a first lens frame supporting a first lens group included in the imaging optical system, and supported by the first cam frame to be movable in the straight-movement direction relative to the first cam frame in response to the drive force; and a second cam frame supported by the stationary frame to be movable in the straight-movement direction and nonrotatable around the optical axis relative to the stationary frame, and supported by the drive frame to be movable integrally in the straight-movement direction and rotatable around the optical axis relative to the drive frame, wherein: the first cam frame includes a plurality of cam pins on the outer periphery side thereof, the drive frame includes a plurality of straight-movement grooves extending in the straight-movement direction and guiding the cam pins, and the second cam frame includes a plurality of penetration cam grooves through which the cam pins pass.