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:
Feb. 08, 2005
Filed:
Aug. 01, 2003
Shinichi Masuda, Tokyo, JP;
Shinichi Masuda, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention discloses a lens apparatus that can surely drive a barrier member by rotating a driving member. A lens apparatus according to this invention comprises a lens forming an optical image, a barrier member which can be moved open and close, a driving member that drives the barrier member to an open position by rotating in one direction around an optical axis, and drives the barrier member to a close position by rotating in another direction around the optical axis, an energizing member energizing the driving member in one direction, and a barrel which is constructed around the optical axis. The barrel has a first guide portion rotating the driving member in the one direction, and a second guide portion rotating the driving member in the other direction according to a relative position change with the driving member with resisting an energizing force of the energizing member.