Shutter mechanism for cameras
AssigneeFuji Photo Optical Co., Ltd.
InventorKoichi Kato
Life of this patent
Estimating the term…
Abstract
A lens shutter comprises shutter blades capable of moving within a shutter chamber of a camera to open and close a lens aperture. A stopper capable of entering into movement loci of the shutter blades selectively takes a position for aperture restriction that stops the shutter blades immediately before they reach positions for full opening of the lens aperture, or a position for restriction release that allows the shutter blades to reach the positions for full opening of the lens aperture. The stopper is urged by a spring toward the position for aperture restriction and is retracted by a releasing member to the position for restriction release when the lens aperture is to be fully opened.
Claims4
A shutter mechanism for a camera, comprising:
- i) a lens shutter constituted of a plurality of shutter blades, which are capable of being moved within a shutter chamber of a camera in order to open and close a lens aperture, and
- ii) a stopper, which is capable of entering into movement loci of the shutter blades, the stopper selectively taking a position for aperture restriction that stops the shutter blades immediately before the shutter blades reach positions for full opening of the lens aperture during opening movements of the shutter blades, or a position for restriction release that allows the shutter blades to reach the positions for the full opening of the lens aperture,
- wherein the stopper is urged by a spring toward the position for the aperture restriction, and
- the stopper is retracted by stopper releasing means to the position for the restriction release in cases where the lens aperture is to be fully opened.
Dependencies are inferred from the claim text.