Title:
APERTURE DEVICE, LENS BARREL, IMAGE CAPTURING DEVICE, AND PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/124071
Kind Code:
A1
Abstract:
This aperture device (10) is provided with: an aperture blade 100 having a first fixed boss 120 and a moving boss 130 that protrudes in a second direction from the other surface of a first planar plate 102; a light leakage prevention blade 200 having a second fixed boss 220 and paired with the aperture blade 100; a driving ring 300 having a first cam groove 330 formed therein; and an accommodation body 400 for accommodating the aperture blade 100, the light leakage prevention blade 200, and the driving ring 300. A second cam groove 230 is further provided in the light leakage prevention blade 200. The moving boss 130 of the aperture blade 100 is inserted and fitted into the second cam groove 230 of the light leakage prevention blade 200, and also inserted and fitted into the first cam groove 330 of the driving ring 300. The light leakage prevention blade 200 has a light leakage prevention blade connection part 250 extending in the other direction from the second fixed boss 220. According to the aperture device 10, the number of blades can be easily increased when compared to the prior art, and the overlay order of the aperture blade and the light leakage prevention blade can be maintained.
Inventors:
HANAOKA TAKAFUMI (JP)
Application Number:
PCT/JP2018/044646
Publication Date:
June 27, 2019
Filing Date:
December 05, 2018
Export Citation:
Assignee:
NITTOH INC (JP)
International Classes:
G03B9/06
Foreign References:
| JP2011215319A | 2011-10-27 | |||
| JPS4326691B1 | 1968-11-16 | |||
| JPH05113591A | 1993-05-07 |
Other References:
See also references of EP 3731012A4
Attorney, Agent or Firm:
MEBUKI IP LAW FIRM et al. (JP)
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