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:
Apr. 21, 2020
Filed:
Oct. 20, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Atsuto Noda, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A lens barrel which prevents an increase in driving force for optical units in a direction of an optical axis to downsize a power transmission mechanism, save power and also prevents undesired movement of the optical units even when they are urged by urging forces large enough to prevent rattling. The optical units move in the direction of the optical axis, and they are urged by urging member in the direction of the optical axis. A camshaft provided on outer peripheries of the optical units extends in the direction of the optical axis and is cam-engaged with each of the optical units. The power transmission mechanism transmits driving force, which is for rotating the camshaft, to the camshaft. A torque generated in the camshaft by the urging member urging one of the optical units and another torque generated in the camshaft by the urging member urging another one of the optical units are opposite in direction.