Camera equipped with light cutoff door opening and closing mecha

Details Camera equipped with light cutoff door opening and closing mecha Camera equipped with light cutoff door opening and closing mecha

1997-09-17

1998-10-13

Metjahic, Safet

Photography

With film drive

Mechanical detail

396412, 396442, 396513, G03B 100, G03B 1700, G03B 1726

Patent

active

058226354

ABSTRACT:
In a camera, there is a requirement for ensuring the timing of opening and closing a film cartridge light cutoff door when a cartridge chamber lid is opened and closed, and moreover for lightening the operational force for opening and closing the cartridge chamber lid. In view of these requirements, the camera according to the present invention includes a cartridge chamber into which a film cartridge which comprises a light cutoff door is loaded, a cartridge chamber lid which is selectively opened and closed so as respectively to communicate the cartridge chamber to the exterior or to isolate the cartridge chamber from external light, and a door opening and closing mechanism which exerts opening driving force upon the light cutoff door so as to open it, after the cartridge chamber has been isolated from external light by closing operation of the cartridge chamber lid. Preferably, the door opening and closing mechanism comprises an energy storage mechanism which stores energy from the cartridge chamber closing operation in order to open the light shielding door of the cartridge. The opening of the light cutoff door is started only after the cartridge chamber has been isolated from external light by closing operation of the cartridge chamber lid.

REFERENCES:
patent: 3604329 (1971-09-01), Land
patent: 4218121 (1980-08-01), Nakagawa et al.
patent: 4351595 (1982-09-01), Date et al.
patent: 4738524 (1988-04-01), Liew
patent: 5481325 (1996-01-01), Wada et al.
patent: 5495310 (1996-02-01), Takatori
patent: 5526084 (1996-06-01), Kataoka et al.
patent: 5604557 (1997-02-01), Kobayashi et al.

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