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. 04, 1989
Filed:
Dec. 29, 1987
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Adjustment apparatus for a lens barrel comprises a built-in driving motor; an output gear which is arranged with have its rotation shaft parallel to the optical axis of the lens barrel and to transmit the rotation of the driving motor; a lens driving device which has a transmission gear engaging the output gear and is arranged to shift the lens of the lens barrel in the optical axis direction by using the rotation of the driving motor as a drive source; and an adjustment cam ring which has a tapered cam part and is rotatable around the optical axis. The tapered cam part abuts on the rotation shaft of the output gear. Back-lash adjustment between the output gear and the transmission gear can be accomplished by moving the position of the output gear by rotating the cam ring around the optical axis.