1991-03-28
1992-02-25
Adams, Russell E.
354214, G03B 118, G03B 112
Patent
active
050917404
ABSTRACT:
A film winding device for a camera is provided in which a drive motor is housed in a film winding spool, and an output shaft of the drive motor projects from the film winding spool. A reduction mechanism is provided between the output shaft and the film winding spool to rotate the film winding spool and to thus wind film thereon. The reduction mechanism comprises a parent gear rotating with the output shaft, a planet gear provided at a position offset from the center of the parent gear, a stationary gear fixed to a camera body, and a rotational gear connected to the film winding device. The stationary gear and the rotational gear are coaxial with the parent gear and mesh with the planet gear. The rotational gear rotates relative to the stationary gear, so that the planet gear is rotated at a rotational speed dependent on the difference between the number of teeth of the stationary gear and the number of teeth of the rotational gear.
REFERENCES:
patent: Re30178 (1979-12-01), Faught
patent: 3948456 (1976-04-01), Shimizu
patent: 3994003 (1976-11-01), Iwashita et al.
patent: 4400074 (1983-08-01), Akiyama et al.
patent: 4416525 (1983-11-01), Chan
patent: 4544251 (1985-10-01), Haraguchi et al.
Richter et al., "Bauelemente Ter Feninmechanik", (Building Elements for Precise Mechanisms), EDI-Derlag, GmbH, Berlin NW7, 1929, pp. 389-394.
English Language Abstract of Japanese 56-38, 102.
Adams Russell E.
Asahi Kogaku Kogyo Kabushiki Kaisha
Noh Joe N.
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