Title:
開口量調整装置、レンズ鏡筒及び光学機器
Document Type and Number:
Japanese Patent JP6977856
Kind Code:
B2
Abstract:
To provide an opening-amount adjustment device that can achieve a desired opening shape.SOLUTION: An opening-amount adjustment device 100 comprises: a first opening member 40 that includes a first opening 42 and a first cam groove 41; a second opening member 20 that includes a second opening 21 and a hole part 22; and a plurality of aperture blades 30 that are arranged so that at least one part mutually overlaps, have a first shaft 32 engaging with the first cam groove 41 and a second shaft 31 engaging with the hole part 22, and by a movement of the first shaft 32 along the first cam groove 41, cause an opening facing the first opening 42 to change. The plurality of aperture blades 30 include, at least, the first aperture blade and the second aperture blade where at least one part faces the first aperture blade, in which the first aperture blade includes the first shaft 32 and the second shaft 31, and the second aperture blade includes a second cam groove 34 engaging with the second shaft 31.SELECTED DRAWING: Figure 3
Inventors:
Ichiro Konei
Application Number:
JP2020211749A
Publication Date:
December 08, 2021
Filing Date:
December 21, 2020
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G03B9/02; G02B7/02
Domestic Patent References:
| JP2011215319A | ||||
| JP62240942A | ||||
| JP2009175596A | ||||
| JP5265075A | ||||
| JP9189936A |
Attorney, Agent or Firm:
Masao Sekiguchi