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:
Aug. 16, 2011
Filed:
Apr. 01, 2008
Yoshio Imura, Kawasaki, JP;
Yoshio Imura, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
Provided is a lens barrel, which can be further reduced by providing such a first helicoid as can be easily manufactured even in the zone of a small lead. The lens barrel () comprises a first barrel member () having a first helicoid (and) formed in a first face (), and a second barrel member () having a second helicoid () formed in a second face () confronting the first face (). The lens barrel is characterized in that the first barrel member () has, in the first face (), a first zone (Z), in which the first helicoid (and) has a first lead, and a second zone (Zand Z), in which the first helicoid (and) has a second lead smaller than the first lead, and in that the first helicoid (and) having the second lead has a smaller thread number than that of the first helicoid (and) having the first lead.