Light quantity adjusting device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 4, 2009
Grant Date -
Dec 27, 2007
app pub date -
Mar 19, 2007
filing date -
Jun 26, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A light quantity adjusting device prevents possible violent vibration resulting from an external force. The light quantity adjusting device includes a substrate having an optical path aperture, a blade movably placed on the substrate to restrict the quantity of light passing through the optical path aperture, and an electromagnetic driving device for drivingly opening and closing the blade. The electromagnetic driving device includes a rotating shaft, an arm integrated with the rotating shaft, and a transmission pin provided on the arm. The blade has a cam groove formed therein and engaging the transmission pin. The cam groove includes a continuous groove having a driving area that crosses a pivoting direction of the transmission pin at a predetermined angle to displace the blade and a non-driving area that crosses the pivoting direction of the transmission pin at a substantially right angle to reduce displacement applied to the blade.
First Claim
Other Claims data not available
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G03B Class
- 6.75 % this patent is cited more than
- 16 Age
