Film auto-loading device of a camera

Details Film auto-loading device of a camera Film auto-loading device of a camera

1997-04-10

1998-09-08

Lee, Eddie C.

Photography

With film drive

Mechanical detail

396413, 396418, G03B 100

Patent

active

058059431

ABSTRACT:
A camera capable of securing a more stable film loading operation and further of conducting a more stable information recording operation. The camera is equipped with a film loading motor (48), a film winding gear train, a film forwarding gear train and a clutch for releasing the transfer of a driving force of the motor (48) to the film forwarding gear train. When the reduction ratio of the film winding gear train is taken to be iW, the reduction ratio of the film forwarding gear train is taken to be iAL and the radius of the outermost portion of a spool shaft (56a) and spool rubber (56b) constituting a film take-up spool is taken as Rs (mm), the relationship among these values is determined as (iAL/iW).times.Rs=.gamma. where .gamma..gtoreq.13.6. In addition, in this case, the value .gamma. satisfies .gamma..gtoreq.19.0.

REFERENCES:
patent: 4589604 (1986-05-01), Yagi et al.
patent: 5091740 (1992-02-01), Hori
patent: 5245372 (1993-09-01), Aoshima
patent: 5434633 (1995-07-01), Nagao et al.
patent: 5437416 (1995-08-01), Ezawa et al.
patent: 5456419 (1995-10-01), Ezawa
patent: 5555050 (1996-09-01), Wakabayashi et al.
patent: 5610677 (1997-03-01), Katagiri

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