Patent ID: 6222994
Filing Date: 2001-04-24
Classification: G03B

Abstract:
A film unit provided with a photographic lens, comprising:an unexposed film chamber in which an unexposed film is accommodated;the photographing lens through which the unexposed film is imagewise exposed;a film wind-up chamber in which a film cartridge having a rotatable spool therein is detachably accommodated, wherein the film wind-up chamber comprises a ceiling plate having an engaging hole;the rotatable spool holding an end portion of the film and having a rotation center on which the spool is rotated so that the exposed film is wound up into the film cartridge;a spool engaging member on the ceiling plate, having a rotation center coaxial with the rotation center of the spool, and comprising an engaging piece and a first eccentric engagement member, the engaging piece adapted to detachably coaxially engage the spool through the hole of the ceiling plate;a spool engaging member guide to maintain the rotation center of the spool engaging member so that the spool engaging member rotates coaxially with the spool;a wind-up knob on the ceiling plate, having a rotation center eccentric to the rotation center of the spool engaging member and comprising a second eccentric engagement member to engage the first eccentric engagement member of the spool engaging member; anda wind-up knob guide to maintain the rotation center of the wind-up knob so that the wind-up knob rotates the spool engaged with the spool engaging member through an engagement between the first eccentric engagement member and the second eccentric engagement member while eccentrically rotating,wherein both of the spool engaging member guide and the wind-up knob guide are mounted on the ceiling plate so as to form a single body with the ceiling plate.