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. 26, 2002
Filed:
Mar. 29, 2001
Tamotsu Koiwai, Akiruno, JP;
Tatsuo Takanashi, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
In a lens barrel, a group- lens frame, which is movable forwardly and backwardly, is fit into an inner peripheral portion of an M-cam frame which is rotatably supported. A cam groove, into which a cam follower fits, is provided at the M-cam frame. A shaft hole, into which a shaft portion of the cam follower is press-fit and fixed, is provided at the group- lens frame. Two edge portions are formed at the shaft portion. Two conical slide faces are provided at a portion which slides at the cam groove of the cam follower. The two edge portions are provided at end portions of the slide faces. When the cam follower attempts to tilt, the edge portions of the shaft portion bite-into a cam face, and prevent a fit-together state of the shaft portion from coming out of place. Further, when an external force acts on the cam follower, the edge portions of the conical slide faces bite into the cam groove such that a fit-together state of the cam follower is prevented from coming out of place.