Title:
ズームレンズ装置
Document Type and Number:
Japanese Patent JP7189699
Kind Code:
B2
Abstract:
To provide a zoom lens device that enables aperture blades to open/close in conjunction with a zoom action without being restricted by a space or a movement of a lens group.SOLUTION: A zoom lens barrel comprises: an inner side stationary barrel 6; a first rotary barrel 10 that is arranged concentrically and coaxially with the inner side stationary barrel 6; a plurality of lens groups that are moved in an optical axis direction by the first rotary barrel 10 being rotated with respect to the inner side stationary barrel 6; a diaphragm mechanism 40 that is arranged between the plurality of lens groups, and includes a concentrically arranged cam seat 42 and driving wheel 46, in which a diameter of a central aperture, and thereby the cam seat 42 and driving wheel 46 are relatively rotated. The zoom lens barrel further comprises a diaphragm linkage ring 50 that rotates when the rotary barrel is rotated with respect to the stationary barrel, in which the rotation of the diaphragm linkage ring 50 is transmitted to the driving wheel 46 or the cam seat 42.SELECTED DRAWING: Figure 5
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Inventors:
Toshiki Nakamura
Application Number:
JP2018158047A
Publication Date:
December 14, 2022
Filing Date:
August 27, 2018
Export Citation:
Assignee:
Tamron Co., Ltd.
International Classes:
G03B9/06; G02B7/02; G02B7/10
Domestic Patent References:
| JP8234075A | ||||
| JP2017097243A | ||||
| JP2013246429A | ||||
| JP61095325A |
Foreign References:
| US5663839 | ||||
| US20170153412 | ||||
| US6161966 |
Attorney, Agent or Firm:
Shinichiro Tanaka
Teshimaru Ken
Yoshi Kazuhiko Ta
Matsushita Mitsuru
Ichiro Kurasawa
Yasushi Yamamoto
Kosuke Yamamoto
Teshimaru Ken
Yoshi Kazuhiko Ta
Matsushita Mitsuru
Ichiro Kurasawa
Yasushi Yamamoto
Kosuke Yamamoto