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:
Feb. 01, 2005
Filed:
Jan. 31, 2001
Shigemi Takahashi, Nerima-ku, JP;
Shigemi Takahashi, Nerima-ku, JP;
Nidec Copal Corporation, Tokyo, JP;
Abstract
A focal-plane shutter for digital still cameras is constructed so that a first driving member for a first blade connected to the first blade is biased by a cocking spring to rotate clockwise and a second driving member for the first blade is biased by a driving spring to rotate counterclockwise. A driving member for a second blade connected to the second blade is biased by a driving spring to rotate counterclockwise. An exposure aperture is fully opened before photographing, and when a cocking member is rotated in a clockwise direction in photographing, the first driving member is released from the holding of the cocking member and is rotated, and the exposure aperture is covered by the first blade. After that, when releasing members are separated from the iron cores of respective electromagnets, locks of locking members are released, and the driving members are rotated counterclockwise in turn. Consequently, exposure is carried out through a slit formed by the first blade and the second blade.