Patent ID: 6584288
Filing Date: 2003-06-24
Classification: G03B

Abstract:
A device for detecting loading of film cartridge in a cartridge loading chamber, said film cartridge having a rotatable spool for advancing a filmstrip, said cartridge loading chamber having an opening for loading said film cartridge and a lid member for covering said opening, said device including:a projection member attached to said lid member, said projection member moving from a first position to a second position when said film cartridge is loaded; and an electric switch incorporated in said lid member, said electric switch being changed over to generate a signal for indicating detection of said film cartridge only when said projection member is moved to said second position; wherein said projection member is spring-biased toward said first position to protrude inside of said cartridge loading chamber, and is engaged with an engaging hole of said spool of said film cartridge to be pushed down to said second position by said spool when said lid member is closed.