Linear vibration motor

摘要

A linear vibration motor comprises: a stator provided with one of a permanent magnet and an electromagnet including a winding; a vibrator provided with the other of the permanent magnet and the electromagnet and supported to be able to vibrate; a movement detection unit for detecting movement of the vibrator; a control output unit for supplying electric power to the winding of the electromagnet based on an output of the movement detection unit so as to generate vibration of the vibrator; a rechargeable battery for supplying electric power to the control output unit; and a power supply unit for supplying electric power to the control output unit and to the rechargeable battery, wherein the power supply unit supplies electric power in an intermittent mode with synchronized timing such that the timing of the intermittent power supply is synchronized with the timing of the power supply to the winding. Thereby, the voltages of the rechargeable battery for left and right outputs to the winding become the same as each other at the timing of supplying electric power to the winding for left and right outputs, preventing amplitude variation caused by difference between the voltages of the rechargeable battery, and thereby preventing amplitude fluctuations and whirring noise.