Patent ID: 6559569
Filing Date: 2003-05-06
Classification: H02K,H02P

Abstract:
A motor device comprising:a first motor unit comprised of: (a) a first rotary magnet that is cylindrical and magnetized so as to have different magnetic poles in turn along the circumferential direction; (b) a first rotary gear having a plurality of teeth, said rotary gear rotating about the rotation axis of said first rotary magnet together with said first rotary magnet; and (c) a stator member having a plurality of outer magnetic poles that are arranged on the outer periphery of said first rotary magnet and a plurality of inner magnetic poles that are arranged on the inner periphery of said first rotary magnet and are opposed to said outer magnetic poles, said plurality of outer magnetic poles and said plurality of inner magnetic poles being excited by a first coil; a second motor unit comprised of: (d) a second rotary magnet that is cylindrical and magnetized so as to have different magnetic poles in turn along the circumferential direction; (e) a second rotary gear having a plurality of teeth, said rotary gear rotating about the rotation axis of said second rotary magnet together with said second rotary magnet; and (f) a stator member having a plurality of outer magnetic poles that are arranged on the outer periphery of said second rotary magnet and a plurality of inner magnetic poles that are arranged on the inner periphery of said second rotary magnet and are opposed to said outer magnetic poles, said plurality of outer magnetic poles and said plurality of inner magnetic poles being excited by a second coil; and a driven member meshed with said first rotary gear and said second rotary gear, wherein electric power having different phases are supplied to said first and second coils to rotate said first rotary gear and said second rotary gear, which then drive said driven member.