Title:
LENS BARREL
Document Type and Number:
WIPO Patent Application WO/2021/015166
Kind Code:
A1
Abstract:
Provided is a lens barrel capable of improving stopping accuracy. A roller support shaft (61) is attached to the outer circumferential part of a cam barrel (16). A torque application roller (102) is rotatably supported on the roller support shaft (61). A bias ring (104) is fitted to the outer circumferential part of a second fixed barrel (12B) and held so as to be movable in the axial direction. The bias ring (104) is biased by a biasing spring (106) and pressed so as to abut against the torque application roller (102). When the cam barrel (16) is rotated, the torque addition roller (102) rolls along the bias ring (104). Load torque is applied to rotation of the cam barrel (16) by friction force generated between the torque addition roller (102) and the roller support shaft (61) through rotation of the torque addition roller (102).
Inventors:
IWASAKI HIROYUKI (JP)
KAWANABE YUICHI (JP)
OTSUKA SHINJI (JP)
KAWANABE YUICHI (JP)
OTSUKA SHINJI (JP)
Application Number:
PCT/JP2020/028073
Publication Date:
January 28, 2021
Filing Date:
July 20, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B7/04; G02B7/08
Foreign References:
| JP2009162822A | 2009-07-23 | |||
| JP2008224949A | 2008-09-25 | |||
| JP2013257369A | 2013-12-26 | |||
| JP2014035438A | 2014-02-24 | |||
| JP2009075328A | 2009-04-09 |
Attorney, Agent or Firm:
MATSUURA, Kenzo (JP)
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