US 12,436,447 B2
Lens barrel having excellent assemblability in assembly of optical lens and other members thereof, and having good optical performance, image pickup apparatus including the same, and method for positioning optical lens
Kohei Uemura, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 24, 2023, as Appl. No. 18/357,310.
Claims priority of application No. 2022-120683 (JP), filed on Jul. 28, 2022.
Prior Publication US 2024/0036440 A1, Feb. 1, 2024
Int. Cl. G03B 17/14 (2021.01)
CPC G03B 17/14 (2013.01) 17 Claims
OG exemplary drawing
 
1. A lens barrel comprising:
an optical lens including a lens unit configured to function as a lens and a flange disposed in an outer peripheral portion of the lens unit and having an enlarged outside diameter;
a retaining member configured to retain the optical lens on one side of the lens unit in a direction of an optical axis;
a pressing member which is positioned and fixed by the retaining member at a position in a perpendicular direction perpendicular to the direction of the optical axis, the pressing member being configured to bias and press the optical lens toward one side in the direction of the optical axis with respect to the retaining member; and
a positioning unit configured to position the optical lens relative to the pressing member,
wherein the positioning unit comprises:
at least one projection, which is disposed in one of the flange and the pressing member, and each of which protrudes in the direction of the optical axis; and
at least one recess, which is disposed in the other of the flange and the pressing member, and each of which is opened toward the projection, and into which the projection is inserted, and
wherein at least one of the projection and the recess has a tilted surface tilted relative to the direction of the optical axis and comes in contact with the other of the projection and the recess by the tilted surface.