Title:
SHUTTER FOR OPTICAL INSTRUMENT AND OPTICAL INSTRUMENT HAVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/012998
Kind Code:
A1
Abstract:
A shutter (1) for an optical instrument, comprising a plurality of sectors (10), (20), and (30) having engagement cam holes (12), (22), and (32), disposed rotatably around fixed shafts (11), (21), and (31), and opening/closing a shutter opening (4) and an operating member (5) engaged with the cam holes to move the sectors. The cam holes (12) and (22) are so formed that, when the sectors (10) and (20) are moved to a position where the shutter opening (4) is closed by the operating member (5), the moving directions of the sectors (10) and (20) can be changed. In this shutter (1), since the moving direction of the sectors (10) and (20) are changed when the sectors (10) and (20) are moved to the position where the shutter opening is closed, hunching does not occur when the sectors are stopped.
Inventors:
KAWAMOTO HISASHI (JP)
SHIODA KAZUYA (JP)
NUMNUAL PHICHET (JP)
SHIODA KAZUYA (JP)
NUMNUAL PHICHET (JP)
Application Number:
PCT/JP2004/010616
Publication Date:
February 10, 2005
Filing Date:
July 26, 2004
Export Citation:
Assignee:
SEIKO PRECISION KK (JP)
KAWAMOTO HISASHI (JP)
SHIODA KAZUYA (JP)
NUMNUAL PHICHET (JP)
KAWAMOTO HISASHI (JP)
SHIODA KAZUYA (JP)
NUMNUAL PHICHET (JP)
International Classes:
G03B9/02; G03B9/07; G03B9/08; G03B9/10; G03B9/18; G03B9/24; G03B9/26; (IPC1-7): G03B9/24
Foreign References:
| JPH09311362A | 1997-12-02 | |||
| JPH0933983A | 1997-02-07 | |||
| JPH0579541U | 1993-10-29 | |||
| JP2001083568A | 2001-03-30 | |||
| JP2001033844A | 2001-02-09 | |||
| JP2000039646A | 2000-02-08 | |||
| JPH08313969A | 1996-11-29 |
Attorney, Agent or Firm:
Katayama, Shuhei (Kyobashi 1-chome Chuo-k, Tokyo 31, JP)
Download PDF: