Title:
カメラ用絞り装置
Document Type and Number:
Japanese Patent JP5373433
Kind Code:
B2
Abstract:
A camera diaphragm device in which two diaphragm blades, that is, first and second diaphragm blades having respective first and second diaphragm aperture portions whose diameters differ from each other is provided. The diaphragm blades are mounted to blade mounting shafts provided close to each other and in a standing manner, and are separately reciprocatingly rotated by driving pins of respective rotors. When the diaphragm device is set in a minimum diaphragm aperture control state, not only is the first diaphragm blade having the first aperture portion for restricting the minimum diaphragm aperture moved to an aperture portion, but also the second diaphragm blade having the second aperture portion for restricting an intermediate diaphragm aperture is moved to the aperture portion from the same direction. An area of the aperture portion that cannot be covered by only the first diaphragm blade is covered by the second diaphragm blade.
Inventors:
Takashi Sawato
Toshihiro Nishimura
Toshihiro Nishimura
Application Number:
JP2009047099A
Publication Date:
December 18, 2013
Filing Date:
February 27, 2009
Export Citation:
Assignee:
Nidec Copal Corporation
International Classes:
G03B9/02
Domestic Patent References:
| JP11133479A | ||||
| JP2002162666A |
Attorney, Agent or Firm:
Shinohara International Patent Office
Yasushi Shinohara
Masayuki Fujinaka
Yasushi Shinohara
Masayuki Fujinaka