| 摘要 |
PURPOSE: A vibration motor is provided to obtain vibratory force with stability by minimizing variation of rotational power of the motor. CONSTITUTION: A vibration motor comprises a rotor(20) including a coil(22) and a commutator(40) and which has unbalanced mass; a rotation shaft(30) for supporting the rotator; and an electrifying unit including a magnet(50) disposed beneath the rotor and which has a cut-away portion(52), a yoke(60) to be tightly attached to the magnet, and a brush(72) disposed to be opposite to the commutator. The magnet has the cut-away portion for passing of a PCB(70) having the brush, and the PCB connected with power line is arranged beneath the magnet. Since the cut-away portion of the magnet is polar boundary, decreasing effect of rotational power of the motor.
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