US 12,092,895 B2
Lens barrel with deceleration mechanism and image pickup apparatus
Kohei Uemura, Kanagawa (JP); and Mitsuhiro Izumi, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 10, 2021, as Appl. No. 17/316,145.
Claims priority of application No. 2020-084026 (JP), filed on May 12, 2020.
Prior Publication US 2021/0356846 A1, Nov. 18, 2021
Int. Cl. G02B 7/02 (2021.01); G02B 7/04 (2021.01); G02B 7/08 (2021.01); G02B 27/64 (2006.01); G03B 3/10 (2021.01); G03B 5/00 (2021.01); G03B 17/14 (2021.01); G02B 7/14 (2021.01)
CPC G02B 7/04 (2013.01) [G02B 7/021 (2013.01); G02B 7/023 (2013.01); G02B 7/08 (2013.01); G02B 27/646 (2013.01); G03B 3/10 (2013.01); G03B 5/00 (2013.01); G03B 17/14 (2013.01); G02B 7/14 (2013.01); G03B 2205/0007 (2013.01); G03B 2205/0053 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lens barrel comprising:
a fixed barrel;
a guide barrel fixed to the fixed barrel;
a cam barrel rotatably supported by the guide barrel;
a driver that is supported by the fixed barrel and drives the cam barrel; and
a deceleration mechanism that is disposed so as to connect the driver and the cam barrel and decelerates rotation from the driver to transmit the rotation to the cam barrel,
wherein the driver is disposed inside the cam barrel,
a rotation shaft of the driver is parallel to a direction of an optical axis of an image pickup optical system,
a first reduction gear of the deceleration mechanism is fixed to the rotation shaft,
at least part of the deceleration mechanism is disposed so as to overlap the cam barrel when viewed from the direction of the optical axis, and
the first reduction gear does not overlap the cam barrel when viewed from a direction orthogonal to the optical axis.