| 摘要 |
A micro speaker is provided to prevent partial vibration of a diaphragm by arranging an input line and an output line to be apart from the diaphragm. A yoke(410) has a receiving space at a lower portion thereof. An upper portion of the yoke is wider than the receiving space. An in/out line through-hole is formed on the upper portion of the yoke. A magnet(420) generates a magnetic field and is fixed in the receiving space to be apart from an inner wall of the receiving space. An upper plate(430) is arranged on the magnet to be apart from the inner wall of the receiving space. A voice coil(440) is arranged between the yoke and the upper plate and is vibrated due to the magnetic field. A circuit board(450) is arranged at a bottom of the yoke and provides an electrical signal to the voice coil. A diaphragm(460) is fixed on an outer side of the upper portion of the yoke. The diaphragm is vibrated according to the vibration of the voice coil to generate an acoustic pressure. |
