Lock device of cartridge chamber door of camera
US5592253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1995 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Aug 16, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lock device of a camera using a film cartridge having a light-shielding door shiftable between a light-shielding condition for shielding light to a photographic film in the film cartridge and a non-light-shielding condition for enabling the photographic film to be withdrawn from the film cartridge, the lock device comprises a cartridge chamber having an opening portion through which the film cartridge is loaded in the cartridge chamber, a cartridge chamber door being disposed in a shielding position for shielding the opening portion of the cartridge chamber when the light-shielding door of the film cartridge is at least in the non-light-shielding condition, a holding member shiftable between a prohibited position for prohibiting movement of the cartridge chamber door from the shielding position and an allowed position for allowing movement of the cartridge chamber door from the shielding position, and a limiting member for limiting movement of the holding member from the prohibited position to the allowed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.