Lens-fitted photographic film unit with film winding motor

Details Lens-fitted photographic film unit with film winding motor Lens-fitted photographic film unit with film winding motor

1995-03-15

1996-10-15

Gray, David M.

Photography

Disposable or recyclable camera

396418, 396301, G03B 118

Patent

active

055659454

ABSTRACT:
A lens-fitted photographic film unit is provided with a motor for rotating a spool to wind up photographic film one frame after each exposure. The motor is supplied with a single cell which may be commonly used for charging a flash unit. The rotational movement of the motor is transmitted to the spool through a speed-reduction gear mechanism which reduces the rotational speed at ratios between 100:1 and 280:1. The motor and the gear mechanism are removably mounted in a frame as a motor unit, and the motor unit is removably attached to a main body of the film unit beside a take-up chamber. Forwardly convex contacting portions are exposed to a front portion of the motor unit. The cell is mounted between contact plates having forwardly convex contacting portions. A motor drive switch for controlling start and stop of the motor also has forwardly convex contacting portions exposed to a front side thereof. These contacting portions are pressed against conductive layers formed on the inner surface of a front cover of the film unit so as to provide a film winding circuit.

REFERENCES:
patent: Re32558 (1987-12-01), Chan

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