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. 11, 2003
Filed:
Mar. 21, 2002
Hiroshi Nomura, Saitama, JP;
Yoshihiro Yamazaki, Saitama, JP;
Isao Okuda, Saitama, JP;
Satoru Nakamura, Tokyo, JP;
Pentax Corporation, Tokyo, JP;
Abstract
A lens barrel includes a cam ring which rotates about an optical axis while moving in the optical axis direction and has a cam groove formed on an inner peripheral surface thereof; a movable lens frame provided inside the cam ring so as to be movable in the optical axis direction without rotating about the optical axis; a cam mechanism for moving the movable lens frame in the optical axis direction by an amount of movement greater than that of the cam ring via rotation of the cam ring in accordance with a profile of the cam groove; and an outer ring which is provided around the cam ring and is engaged therewith so that the cam ring is rotatable about the optical axis relative to the outer ring and so that outer ring moves together with the cam ring in the optical axis direction.