VOICE COIL MOTOR, LENS MOVING DEVICE, AND IMAGING APPARATUS

A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. The coil is formed in a trapezoidal shape where an outer wi...

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Bibliographische Detailangaben
1. Verfasser:	KAWANABE, Yuichi
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY ELECTROGRAPHY GENERATION HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. The coil is formed in a trapezoidal shape where an outer wire length as a wire length of an outer long side is shorter than an inner wire length as a wire length of an inner long side. Since the outer long side is made shorter than the inner long side, an opposite thrust caused by current flowing in the outer long side can be reduced. Accordingly, a reduction in the thrust of the coil is suppressed by as much as the reduced opposite thrust.