Title:
DIAPHRAGM DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/061986
Kind Code:
A1
Abstract:
Disclosed is a diaphragm device, wherein a driving ring (60) comprises a follower pin (66), a transmission member (20) comprises a cam ditch (26) that fits with the follower pin (66), the quantity of rotations of the transmission member (20) has a nonlinear relation with the quantity of rotations of the driving ring (60), and the interval between the minimum aperture stop position of the driving ring (60) at a time when the aperture of the opening (51) is at minimum and the potential stop position that is adjacent to the minimum aperture stop position is greater than the interval of the potential stop position that is adjacent to the driving ring (60) at times other than when the aperture is at minimum.
Inventors:
KAWAMOTO HISASHI (JP)
Application Number:
PCT/JP2010/065043
Publication Date:
May 26, 2011
Filing Date:
September 02, 2010
Export Citation:
Assignee:
SEIKO PRECISION KK (JP)
KAWAMOTO HISASHI (JP)
KAWAMOTO HISASHI (JP)
International Classes:
G03B9/06; G03B9/02
Foreign References:
| JP2003195389A | 2003-07-09 |
Attorney, Agent or Firm:
KATAYAMA, SHUHEI (JP)
Shuhei Katayama (JP)
Shuhei Katayama (JP)
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