Lens driving device and imaging device

Details Lens driving device and imaging device Lens driving device and imaging device

2005-11-22

2005-11-22

Perkey, W. B. (Department: 2851)

Photography

Having variable focal length of camera objective

Power zoom

C396S133000, C359S824000, C310S012060

Reexamination Certificate

active

06968129

ABSTRACT:
To enable the thrust of a linear actuator comprised of a driving magnet and a drive coil to act in a fixed and stable manner, the present invention is a lens driving device that comprises a driven body supporting an optical lens capable of freely moving along an optical axis direction, a drive coil fitted to the driven body, and a magnet having a surface set so as to have a prescribed gap with the moving drive coil, wherein a gap between the surface of the magnet and the drive coil is set in such a manner as to be broader at a central part of the range of movement of the drive coil than at an end part.

REFERENCES:
patent: 4540905 (1985-09-01), Morino et al.
patent: 5073882 (1991-12-01), Sasaki
patent: 5541777 (1996-07-01), Sakamoto et al.
patent: 6043572 (2000-03-01), Nagai et al.
patent: 2001/0026528 (2001-10-01), Suzuki et al.
patent: 07-239437 (1995-09-01), None
patent: 2002-169073 (2002-06-01), None

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