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. 21, 1990
Filed:
May. 05, 1989
Ken Nagasaka, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A lens-driving cam mechanism includes a zoom cylinder rotatable about the optical axis of the lens and a zoom cam ring incapable of rotation about the optical axis provided on the peripheral surface of the zoom cylinder. A front cam portion and a rear cam portion are formed on the zoom cylinder. Cam followers which contact with the front cam portion and the rear cam portion are formed on the peripheral surface of the zoom cylinder. When the zoom cylinder rotates, the zoom cam ring is moved along the optical axis by the cooperation of the cam portions and the cam followers. The zoom cam ring has on the inner surface thereof a cam follower-inserting groove for permitting one of the cam followers to pass therethrough so that the zoom cylinder and the zoom cam ring can be assembled.