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:
Oct. 18, 1988
Filed:
Dec. 03, 1987
Applicant:
Inventors:
Yutaka Fujiwara, Kanagawa, JP;
Hiroshi Yamamoto, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350269 ; 354230 ; 354274 ;
Abstract
A diaphragm driving mechanism which includes diaphragm blades, a diaphragm drive member for driving motion of the diaphragm blades, a support member for pivotally supporting the diaphragm blades, a magnet member fixedly secured to the diaphragm drive member or the support member and movable in a direction parallel with an optical axis, coils constituting an electromagnetic induction mechanism together with the magnet member, and a bias member imparting a force parallel to the optical axis to the magnetic member to cause the magnetic member to be displaced relative to the coils.