| 摘要 |
The present invention has a frame which has a generally rectangular shape and has four sidewalls and a mounting terminal located in the upper part of the sidewall, a yoke which is combined with the frame to form a lower surface, a center magnet fixed onto the yoke, a pair of side magnets which is fixed to the yoke and is located at both side of the center magnet, a voice coil which has one end located in a gap part between the center magnet and the side magnet and a gap part between the center magnet and a bending part, and is vibrated by a mutual electromagnetic force, and a vibration plate which is vibrated by the voice coil and is mounted on the mounting terminal of the frame. The yoke has a groove for blowing air to a side end. |
