US 12,228,751 B2
Lens barrel
Kunihiko Shimizu, Tokyo (JP); and Mizuki Wayu, Tokyo (JP)
Assigned to NIKON CORPORATION, Tokyo (JP)
Appl. No. 17/256,493
Filed by NIKON CORPORATION, Tokyo (JP)
PCT Filed Jun. 4, 2019, PCT No. PCT/JP2019/022174
§ 371(c)(1), (2) Date Dec. 28, 2020,
PCT Pub. No. WO2020/003922, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-123658 (JP), filed on Jun. 28, 2018.
Prior Publication US 2021/0278571 A1, Sep. 9, 2021
Int. Cl. G02B 7/02 (2021.01); G02B 5/00 (2006.01)
CPC G02B 5/005 (2013.01) [G02B 7/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A lens barrel comprising:
an aperture unit having a cam follower;
a moving tube having a cam groove that engages the cam follower, the moving tube (i) being provided on an outer circumference of the aperture unit, (ii) being prevented from rotating about an optical axis of the lens barrel, and (iii) being movable in an optical axis direction; and
a fixed tube provided on an outer circumference of the moving tube so as to engage the moving tube directly, wherein
the moving tube is movable in the optical axis direction with respect to the fixed tube.