Patent ID: 7723881
Filing Date: 2010-05-25
Classification: H02K

Abstract:
1. A type of flat vibrator, comprising: an oscillator having a spout shape without a center portion, a first side and a second side, wherein the first side of said oscillator comprises one or more elliptical protuberances and a weight; a hard circuit board, wherein the second side of said oscillator comprises a groove, and wherein the hard circuit board is installed into the grove of the oscillator and forming the center portion of a rotor; the rotor; a shaft in the middle of the rotor to support rotation of the rotor; a lower shell holding the shaft; magnets disposed on the lower shell providing magnetic force; a soft circuit board for receiving power input and disposed on the lower shell; and electric brushes connecting to the soft circuit board, the rotor, and coils; wherein said coils are installed on the oscillator by disposing the coils on the one or more elliptical protuberances; wherein the hard circuit board is installed on the oscillator and forms the center portion of the rotor, and the oscillator is injection molded onto the rotor; wherein the oscillator has a rim extending beyond the position of the coils and the hard circuit board.