| 摘要 |
The invention relates to a micro speaker including a directly driven vibration plate having a built-in voice coil patterned using a flexible PCB manufacturing technique. The speaker includes an upper housing, a lower housing, a permanent magnet located between the upper and lower housings, and a vibration plate placed over the permanent magnet and including a metal pattern functioning as a voice coil. The center portion and the peripheral portion of the voice coil are connected without a seam and the portions of the voice coil in which electrical current flows in the same direction are aligned to air gaps between the permanent magnets. |
