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:
Feb. 03, 1998
Filed:
Jan. 15, 1997
Akio Ohmiya, Ohmiya, JP;
Fuji Photo Optical Co. Ltd., , JP;
Abstract
An initial focusing mechanism for a variable-focus photographic camera having a three-stage extension lens barrel, in which a first driving lens barrel is linearly moved back and forth along linear guiding means relative to a stationary lens barrel in the direction of the optical axis and an initial position of the first driving lens barrel relative to the stationary lens barrel is adjusted by attaching or detaching a focusing member to or from the linear guiding means. The operation of initial focusing is thereby simplified. A support block is formed on a portion of the first driving lens barrel and a nut member formed with a female screw is loosely inserted into a nut holder formed in a portion of the support block followed by threading a driving screw extending in parallel to the optical axis with the female screw. A washer formed with a U-shaped notch is attached or detached to or from the driving screw with the first driving lens barrel having been assembled to the stationary lens barrel to adjust an initial position of the first driving lens barrel. Accordingly, the operation of initial focusing can be performed by selectively adjusting, for example, a thickness of the washer.