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:
Jul. 23, 2002
Filed:
Feb. 05, 2001
Futoshi Hirai, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A lens barrel has a cam tube having a cam groove formed on an inner circumferential side thereof. The cam groove has a first cam groove area over which a lens unit slides when the lens barrel is used for photo-taking and a second cam groove area over which the lens unit slides when the lens barrel is not used for photo-taking. A taper angle of a side wall surface of the first cam groove area differs from a taper angle of a side wall surface of the second cam groove area. The large taper angle facilitates removal of a mold from the cam tube at the time of manufacture. The arrangement also permits the first cam groove area which is for photo-taking to have a small taper angle, so that the lens unit can be accurately moved in the first cam groove area.