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. 04, 2014
Filed:
May. 27, 2014
Fujifilm Corporation, Tokyo, JP;
Minoru Tanaka, Saitama, JP;
Atsushi Misawa, Saitama, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
An outer tube body of a device for changing operating force is connected to a gear part of a zoom ring of a lens barrel to rotate the outer tube body together with the zoom ring. The outer tube body has a cylindrical shape and includes a hollow part into which an inner tube body whose rotation is restricted is arranged. Grease is interposed in a gap is formed between an inner peripheral surface of the outer tube body and an outer peripheral surface of the inner tube body. A load caused by viscosity resistance of the grease is applied against rotation of the outer tube body together with the zoom ring. The inner tube body can be displaced in a direction of the center axis so that area of a sliding contact region between the outer tube body and the inner tube body is changed.