Lens drive apparatus and image pickup apparatus including...

Details Lens drive apparatus and image pickup apparatus including... Lens drive apparatus and image pickup apparatus including...

2011-05-10

2011-05-10

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With support

C359S822000, C396S133000

Reexamination Certificate

active

07940482

ABSTRACT:
A lens drive apparatus that can prevent a propulsion force generated in a direction other than an optical axis direction without a second yoke, reduce a size of the entire apparatus, and high-accurately drive a lens holding frame in the optical axis direction. The apparatus including: a member to be driven that holds a lens, is movable in the optical axis direction, and is guided and supported in a lens barrel; a movable coil wound with at least two sides in parallel to the optical axis direction, and mounted to a part of the member to be driven; and a magnet placed to face the movable coil in parallel to the optical axis direction, and provided in the lens barrel, wherein the movable coil is configured so that at least one side of the two sides and one side other than the two sides face surfaces of the magnet.

REFERENCES:
patent: 5199014 (1993-03-01), Homburg et al.
patent: 5305151 (1994-04-01), Kakimoto et al.
patent: 2008/0069554 (2008-03-01), Huang
patent: 2009/0195087 (2009-08-01), Kurosawa
patent: 2002-169073 (2002-06-01), None

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