Patent ID: 7466504

Claim:
A lens barrel in which a plurality of movable units, each including a group of lenses, are moved in the optical axis direction when a cam ring is rotated relative to a stationary ring around the optical axis, the lens barrel comprising: a first movable unit including a first group of lenses and a first moving frame that holds the first group of lenses, the first moving frame having a roller support hole formed therein; a second movable unit including a second group of lenses and a second moving frame that holds the second group of lenses, the second moving frame disposed inside the first moving frame; a pressing roller supported in the roller support hole in the first moving frame in such a way that the pressing roller is rotatable around an axis perpendicular to the optical axis, the pressing roller being rotated when the first or second movable unit is moved in the optical axis direction; a biasing spring attached to the outer surface of the first moving frame, the biasing spring pressing the pressing roller against the outer surface of the second moving frame; and a receive roller supported by the first or second moving frame in such a way that the receive roller is rotatable around an axis perpendicular to the optical axis, the receive roller being pressed by the biasing force of the biasing spring against the second or first moving frame and being rotated when the first or second moving frame is moved in the optical axis direction.