The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2008
Filed:
Oct. 16, 2006
Tadanori Tanaka, Kokubunji, JP;
Yoshihiro Yokomae, Higashiyamato, JP;
Tadanori Tanaka, Kokubunji, JP;
Yoshihiro Yokomae, Higashiyamato, JP;
Olympus Corporation, Tokyo, JP;
Abstract
A lens barrel comprises a first frame including an inward flange having an opening as a light path for a photographic optical system, a barrier-driving member disposed in the vicinity of the opening, a second frame disposed inside the first frame and movable along an optical axis relative to the first frame, a barrier blade movable along with the rotation of the barrier-driving member between a closed position in which the barrier blade blocks at least a part of the light path and an open position in which the barrier blade is retracted from the light path, an opening-urging member capable of urging the barrier blade towards the open position and urging the barrier-driving member towards a first direction, and a closing-urging member capable of urging the barrier blade toward the closed position. In the event that an external force, such as photographer's finger, urges the barrier blade toward an open position, the closing-urging member urges the barrier blade to the closed portion when the external force is removed.