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:
Apr. 16, 2002
Filed:
Jul. 10, 2001
Tamotsu Koiwai, Akiruno, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A lens barrel (lens frame structure) using a cam mechanism with a cam follower is provided in which deviation of engagement of a frame member at an engaging part of the cam-follower is less likely to happen. A cam ring and a lens holding frame of the lens barrel are connected through the cam-follower, with a first cam groove running obliquely to an optical axis and a second cam groove running along the periphery direction of the optical axis. The second cam groove comprises an oblique cam plane and a parallel wall plane, and the cam-follower has a conical surface in sliding contact with the cam plane and a circular ring part in sliding contact with the parallel wall plane. The circular ring part digs into the parallel wall plane and deviation of the cam ring is prevented, if the cam ring comes to be distorted by applying careless stress to the cam follower.