| 摘要 |
A sound wave actuator comprises: a magnetic circuit unit comprising a bobbin having an insertion hole penetrating the middle thereof from the upper surface thereof to the lower surface thereof, a coil wound on the outer circumferential surface of the bobbin, and a magnet which is inserted into the insertion hole and vibrates vertically along the insertion hole; a vibration transfer unit connected to the magnet to transfer vibration by the magnet to the outside of the bobbin; a magnet support unit inserted into the insertion hole and fixed on the lower surface of the magnet facing the lower surface of the bobbin to support the magnet; a noise prevention unit inserted into the insertion hole to prevent noise; and a plate spring fixed on the lower surface of the bobbin to cover the insertion hole. |
