Patent ID: 7679239

Claim:
A flat type vibrating motor comprising: a lower cover for protecting a lower portion of the motor; an upper cover for protecting an upper portion of the motor; a shaft supported by the lower cover and the upper cover; a rotor supported by the shaft and having an eccentric center of gravity; a magnet fixed on the rotor; a substrate provided on an upper surface of the lower cover; a Hall device for detecting rotation of the magnet; a control integrated circuit for controlling power in response to a detecting signal of the Hall device; a plurality of primary coils for receiving power under control of the control integrated circuit; and at least one auxiliary coil disposed at a predetermined mechanical degree with respect to at least one of the primary coils and series-connected with the primary coil, wherein the plurality of primary coils comprise two coils, and the at least one auxiliary coil comprises a pair of auxiliary coils.