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:
Jan. 22, 1991
Filed:
Mar. 19, 1990
Kiyoshi Touma, Tokyo, JP;
Takashi Shimamura, Tokyo, JP;
Copal Company Limited, Tokyo, JP;
Abstract
A compact camera has a zooming lens system for regulating a focal distance and a shutter blade member for opening and closing the lens system. The blade member is shifted forwardly from its rest position to open the lens system through a given shift amount effective to determine a lens aperture size to effect exposure, and subsequently is shifted reversely to close the lens system to return to the rest position. A driving mechanism is connected to the blade member to undergo a reciprocating stroke to drive the blade member forwardly and reversely to effect opening and closing of the lens system. The blade member and the driving mechanism are disposed on a substrate. An adjusting mechanism is disposed around the substrate. The adjusting mechanism includes a stopper member undergoing displacement in response to the zooming of the lens system. The stopper member acts on the driving mechanism to control the reciprocating stroke of the driving mechanism according to the displacement of the stopper member so as to limit the shift amount of the blade member to thereby effect adjustment of the lens aperture size according to the lens focal distance or the zooming. Generally, the adjustment is carried out such as the smaller the focal distance, the smaller the lens aperture size.