JP2010197698A5 - - Google Patents

Description

The lens barrel of the present invention includes a fixed cylinder having a rectilinear guide groove, a cam cylinder that is disposed on the outer peripheral side or the inner peripheral side of the fixed cylinder, is fitted with the fixed cylinder, and has a plurality of cam grooves, and the fixed cylinder A rectilinear cylinder that is disposed on the outer peripheral side of the cam cylinder and moves in the optical axis direction as the cam cylinder rotates, a lens holding barrel that is fixed to the rectilinear cylinder and holds a lens group, and the rectilinear cylinder In a lens barrel that is fixed and has a straight guide groove and a cam follower that engages with the cam groove, and moves the lens holding barrel in the optical axis direction by rotating the cam barrel around the optical axis.
The cam follower includes an engaging portion that engages with the cam follower position regulating portion provided on the rectilinear barrel, and a first cylindrical portion to be engaged with both the straight advance guide grooves and the cam grooves are formed integrally It is characterized by having.

Claims (8)

A fixed cylinder having a rectilinear guide groove, arranged on the outer peripheral side or inner peripheral side of the fixed cylinder, fitted with the fixed cylinder and having a plurality of cam grooves, the fixed cylinder, and an outer peripheral side of the cam cylinder A rectilinear barrel that moves in the optical axis direction as the cam barrel rotates, a lens holding barrel that is fixed to the rectilinear barrel and holds a lens group, is fixed to the rectilinear barrel, and the rectilinear guide groove In a lens barrel that has a cam follower that engages with the cam groove and moves the lens holding barrel in the optical axis direction by rotating the cam barrel around the optical axis.
The cam follower includes an engaging portion that engages with the cam follower position regulating portion provided on the rectilinear barrel, and a first cylindrical portion to be engaged with both the straight advance guide grooves and the cam grooves are formed integrally A lens barrel characterized by that.   2. The lens barrel according to claim 1, wherein the cam follower has a base portion made of metal and the first cylindrical portion and the engaging portion are formed of resin by outsert molding. 3.   3. The lens barrel according to claim 1, wherein the first cylindrical portion of the cam follower includes a first engaging portion having a surface parallel to the rectilinear guide groove. 4. .   The first engagement portion is formed of a resin portion, and the cam follower includes a second engagement portion made of a metal base portion having a width smaller than the width of the first engagement portion. 4. The lens barrel according to claim 3, further comprising:   5. The lens barrel according to claim 1, wherein a planar portion perpendicular to the rectilinear guide groove is formed in the first cylindrical portion of the cam follower.   6. The lens barrel according to claim 1, wherein the cam follower is fixed to the rectilinear cylinder with a screw from an outer peripheral direction of the rectilinear cylinder.   The lens barrel according to claim 6, wherein the cam follower has a convex portion on a mounting surface side of the screw. An optical apparatus comprising the lens barrel according to claim 1.