Patent ID: 7969053
Filing Date: 2011-06-28
Classification: H02K

Abstract:
1. A flat type vibration motor comprising: a hard circuit board, a rotor, wherein the rotor includes a vibrator made of an alloy material with a density greater than 15 Kg/m a shaft arranged in the rotor to support the rotor to rotate, a lower case designed to fix the shaft, a magnet fixed on the lower case to provide magnetic force, a flexible circuit board attached to the lower case to provide power input, a brush connected between the flexible circuit board and the rotor, and winding coils, wherein the winding coils and the hard circuit board are mounted on the vibrator such that the outer edge of the vibrator is extended outwards to a position beyond the winding coils and the hard circuit board, and wherein the vibrator has bulges on one side which are designed to mount the winding coils.