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:
Nov. 04, 2008
Filed:
Dec. 21, 2006
Applicant:
Takahiro Morinaga, Tokyo, JP;
Inventor:
Takahiro Morinaga, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens driving device which can improve the positional accuracy of a moving lens while realizing a low component count and saving space. In the lens driving device provided in a lens barrel, a lens moves along the optical axis. A guide shaft is fixed to a lens barrel case and has a male thread portion formed along the optical axis. A rotor, which is driven by a motor, has a female thread portion that is to be threadably engaged with the male thread portion. A lens holder holds the lens and moves the lens along the optical axis in response to rotation of the rotor. An urging spring urges the lens holding member onto the rotary member.