| 摘要 |
The micro-speaker using radially magnetized magnet is provided to maximize the intensity of the magnetic field applied in the voice coil by reducing the thickness of the bottom plate and top plate. The radially magnetized magnet(204) comprises the inside diameter(209) and the outer diameter portion(210) having the magnetic polarity. The cylinder type top plate(205) is adhered to the inside diameter of the radially magnetized magnet. The cylinder type bottom plate(206) is adhered to the outer diameter portion. The diaphragm edge(201) is fixed to the inside of the bottom plate. The yoke(207) adheres closely to the bottom plate. The voice coil(203) is adhered to the inside of the diaphragm edge. The voice coil is inserted to the air gap. A plurality of sound emission holes(212) is formed on the top of yoke. |
