Lens-fitted photographic film unit

A lens-fitted photographic film unit including a photo-taking mechanism and unexposed photographic film, comprising:

• a main body carrying said photo-taking mechanism and containing said unexposed film at the rear thereof;
• a plastic rear cover for covering the rear of said main body in light-tight fashion;
• a claw structure formed on said rear cover for retaining said rear cover on said main body;
• and
• a receiving portion formed on said main body and unremovably retained on said claw structure, said receiving portion being readily broken away from said main body and retained on said claw structure upon separation of said rear cover from said main body, the receiving portion retained on said claw structure serving as an indication that said rear cover has been used.

A lens-fitted photographic film unit including a photo-taking mechanism and unexposed photographic film, comprising:

• a main body carrying said photo-taking mechanism and containing said unexposed film at the rear thereof;
• a plastic rear cover for covering the rear of said main body in light-tight fashion;
• a wind-up wheel rotatably mounted on said main body for winding up said film;
• a reversal-preventing claw formed integrally with said main body and engaged with said wind-up wheel, for preventing said wind-up wheel from rotating in a direction opposite to a direction for winding up said film;
• a retaining claw structure formed on said rear cover and engaged with said reversal-preventing claw, for retaining said rear cover on said main body;
• the engagement between said retaining claw structure and said reversal-preventing claw being such that when said rear cover is removed from said main body, said reversal-preventing claw is disengaged from said wind-up wheel to allow reverse rotation of said wind-up wheel.