Flat coreless vibration motor with large center shift

摘要

A flat core-less vibration motor capable of increasing the amount of vibration and reducing the weight with a simple configuration without changing the size and increasing the thickness is disclosed.;The flat core-less vibration motor of the present invention is a synthetic resin that constitutes eccentric rotors (9, 99) formed by integrally molding a plurality of armature coils on one side and integrally formed with a synthetic resin, ) And the inner side is a resin (L) having a density of 1.8 or less and the outer diameter of the magnets (3, 33) is made smaller than the outer diameter of rotation of the eccentric rotor and the outer peripheral magnet side of the eccentric rotor And at least a part of the protrusion is disposed in the space 123 between the outer periphery of the magnet and the housing.