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:
May. 31, 2005
Filed:
Feb. 26, 2004
Kouichi Kudo, Tokyo-to, JP;
Nobuyoshi Inoue, Kawagoe, JP;
Kouichi Kudo, Tokyo-to, JP;
Nobuyoshi Inoue, Kawagoe, JP;
Nidec Copal Corporation, Tokyo, JP;
Abstract
A focal plane shutter for cameras is provided with a shutter blade which can be actuated to both directions for opening and for closing a photographing optical path by an electromagnetic apparatus. When a rotor is rotated to the direction corresponding to the direction of conduction of coils an actuating member which is formed in one with the rotor make arms rotate by its actuating pin and actuates four blades of the shutter blade about upward and downward direction. A brake member rotatably arranged together with on a friction plate on a shaft has bent portions formed near tip portions of the arm portions which are inserted in a slot on a shutter base plate. An operation for opening the shutter blade is braked by the actuating pin contacting, pressing and moving one of the bent portions at termination stage, and a closing operation is braked by the actuating pin contacting, pressing and moving another bent portion at the termination stage. Thus the shutter blade can be braked suitably at the termination stage and stopped early.