Electromagnetic drive

Details Electromagnetic drive Electromagnetic drive

2005-05-31

2005-05-31

Nguyen, Judy (Department: 2851)

Photography

Camera detail

Shutter

C396S467000, C396S468000, C396S493000

Reexamination Certificate

active

06899472

ABSTRACT:
An electromagnetic unit is provided for a lens barrel in which a light exposure controlling unit for controlling an amount of light is integrated. The electromagnetic unit is employed as a drive source for driving shutter blades, and a direction of the movement of a plunger in the electromagnetic unit is switched by a shutter lever, and the shutter blades are opened and closed. A coil and the plunger of the electromagnetic unit are disposed in parallel with an optical axis to reduce the space required for the electromagnetic unit, whereby downsizing of the light exposure controlling unit and the lens barrel is achieved.

REFERENCES:
patent: 4316661 (1982-02-01), Saito
patent: 4505568 (1985-03-01), Asano et al.
patent: 5325148 (1994-06-01), Katagiri et al.
patent: 5548367 (1996-08-01), Katagiri
patent: 6123466 (2000-09-01), Persson et al.
patent: 6572283 (2003-06-01), Imano
patent: 04-194912 (1992-07-01), None

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