Electromagnetic drive device and light quantity adjustment...

Details Electromagnetic drive device and light quantity adjustment... Electromagnetic drive device and light quantity adjustment...

2006-01-03

2006-01-03

Perkey, W. B. (Department: 2851)

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C310S037000, C310S194000, C310S254100

Reexamination Certificate

active

06981807

ABSTRACT:
An electromagnetic drive device includes a coil frame with a hollow tubular shape, a magnet rotor disposed in the coil frame to be rotatable through a rotational shaft, a transmission arm attached to the rotational shaft for outputting a rotation of the magnet rotor to an outside, and a coil wound around an outer periphery of the coil frame. The tubular coil frame is divided laterally in a direction perpendicular to the rotational shaft, and is formed of two bobbin members. The transmission arm is attached to the rotational shaft in a state approximately perpendicular to the rotational shaft. An opening is provided in one of the bobbin members in a peripheral side surface at a location different from a connection surface contacting the other of the bobbin members, so that the transmission arm protrudes to an outside of the coil frame through the opening.

REFERENCES:
patent: 5262812 (1993-11-01), Fukasawa
patent: 6726380 (2004-04-01), Watanabe et al.
patent: 2004/0222709 (2004-11-01), Naganuma et al.
patent: 2606159 (2000-07-01), None

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