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:
Nov. 13, 2001
Filed:
Mar. 15, 2000
Tatsuo Takanashi, Hachioji, JP;
Olympus Co., Ltd., Tokyo, JP;
Abstract
A lens barrel apparatus according to the present invention incorporates a cam cylinder serving as a lens barrel having cam grooves for moving frame. Spring portions serving as spring means for making predetermined holding force are formed adjacent to the cam grooves to cause the cam grooves to pinch the cam followers. The cam grooves are continuous grooves or openings formed in the surface adjacent to the cam cylinder. The spring portions are constituted by a plurality of openings formed adjacent to the cam grooves. The lens barrel apparatus exhibiting a simple structure having the small number of elements can be operated by a structure constituted by a cam and a cam follower free from any looseness.