US 12,242,173 B2
Lens barrel and imaging apparatus
Kunihiko Shimizu, Tokorozawa (JP); Hisanori Togawa, Yokohama (JP); Koji Nagaoka, Yokohama (JP); and Takuji Hamasaki, Tokyo (JP)
Assigned to NIKON CORPORATION, Tokyo (JP)
Appl. No. 17/269,107
Filed by NIKON CORPORATION, Tokyo (JP)
PCT Filed Aug. 20, 2019, PCT No. PCT/JP2019/032365
§ 371(c)(1), (2) Date Feb. 17, 2021,
PCT Pub. No. WO2020/040112, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 2018-154296 (JP), filed on Aug. 20, 2018.
Prior Publication US 2021/0311376 A1, Oct. 7, 2021
Int. Cl. G03B 17/14 (2021.01); G02B 7/02 (2021.01); G02B 7/04 (2021.01); G02B 7/14 (2021.01); G03B 5/02 (2021.01); G03B 17/56 (2021.01)
CPC G03B 17/14 (2013.01) [G02B 7/021 (2013.01); G02B 7/04 (2013.01); G02B 7/14 (2013.01); G03B 5/02 (2013.01); G03B 17/565 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A lens barrel switchable between a first mode in which a total length of the lens barrel is fixed and a second mode in which the total length of the lens barrel is changeable, the lens barrel comprising:
a first frame;
a second frame that is rotatable with respect to the first frame, the second frame having a first surface, a second surface and a third surface, the first surface and the second surface having respective inclinations with respect to an optical axis direction, and the third surface being disposed between the first surface and the second surface and being perpendicular to an optical axis;
an urging member that is held in the first frame; and
a moving member that is movable in the optical axis direction and is arranged to be in contact with the second frame by an urging force of the urging member, wherein:
in the first mode, the moving member is in contact with the first surface;
in the second mode, the moving member is in contact with the second surface; and
in a third mode in which the first mode is transited to the second mode, the moving member slides in contact with the third surface.