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. 07, 1998
Filed:
Sep. 23, 1996
Hideo Kobayashi, Omiya, JP;
Kazuaki Nagata, Omiya, JP;
Fuji Photo Optical Co., Ltd., Omiya, JP;
Abstract
In a zoom finder incorporated into a camera with a zooming function, the power of a motor, which also serves as a motor for driving a lens barrel of a taking lens, is transmitted to a lens barrel driving gear, and it is transmitted via a gear train to a cam shaft, where a cam face for regulating positions of movable lenses in a finder variable magnification optical system is formed. The gear train is held by a gear holding plate, and is directly attached to the bottom of an AF/finder body frame, in which the cam shaft is mounted, with the gear holding plate. As a result, the backlash of the gear train can be small, and a hysteresis of a magnification and a visual field rate, hysteresis which is caused by the back and forth movement of the movable lenses, can be prevented.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile