| 摘要 |
PURPOSE: A speaker unit is provided to maximize kinetic energy which is transformed in a coil by delivering the kinetic energy to a vibration plate and removing a loss current and a loss magnetic flux. CONSTITUTION: A coil(20) is combined with a vibration plate(10). An upper magnet(30) is arranged in the upper part of the coil. A lower magnet(40) is arranged in the lower part of the coil. The coil is arranged to be separated between the upper magnet and the lower magnet. The coil, the upper magnet, and the lower magnet are arranged at the center of the vibration plate. |
