专利内容由知识产权出版社提供
专利名称：DRIVING DEVICE, OPTICAL APPARATUS,
AND IMAGE PICKUP APPARATUS
发明人：Chikara AOSHIMA申请号：US12035876申请日：20080222
公开号：US20080165440A1公开日：20080710
专利附图：
摘要：A driving device which is capable of increasing a driving speed at which an objectto be driven is driven, enhancing quietness in driving the object to be driven, andpositioning the object to be driven with high accuracy. A hollow cylindrical magnet ()
extends along an optical axis, and a plurality of magnetized parts (a to j) spirally extendalong the outer peripheral surface of the magnet. A first yoke (), a second yoke (), a thirdyoke (), and a fourth yoke () are formed of a soft magnetic material, and each of theyokes has five magnetic pole teeth (a to e, a to e, a to e, or a to e) each disposed inopposed relation to a corresponding one of the magnetized parts of the magnet. A lensholder () holds the object to be driven and supports the magnet such that the magnet ismovable along the optical axis. First and second coils () for magnetizing the first andsecond yokes, respectively, are energized to move the magnet along the lens holder inthe direction along the predetermined axis to thereby drive the object to be driven.
申请人：Chikara AOSHIMA
地址：Zama-shi JP
国籍：JP
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