Patent ID: 6700250
Filing Date: 2004-03-02
Classification: H02K

Abstract:
A vibrating motor comprising:a field magnet having a plurality of magnetic poles such that S and N magnetic poles are alternately magnetized in a circumferential direction; a rotating shaft; an armature core having three salient poles comprising a central salient pole and a pair of auxiliary salient poles which are spaced apart from said central salient pole on either side, said three salient poles being shifted and arranged around said rotating shaft with non-centrosymmetry a coil being wound on each of said three salient poles; wherein; a facing gap between said central salient pole and said field magnet is formed narrower than facing gaps between said auxiliary salient poles and said field magnet; an exciting force of said central salient pole is greater than that of said auxiliary salient poles; and in starting, the same magnetic pole as the magnetic pole of said field magnet generates in a facing surface of said central salient pole and a repulsive force occurs so that said armature core is urged to rotate.