| 摘要 |
<p>A magnetic circuit comprises a yoke (10) wherein the bottom section (10b) of the yoke (10) is thicker than a cylinder outer peripheral section (10a). This magnetic circuit is constituted of the yoke, a magnet (2) joined to the bottom section of this yoke, and a top plate (3) joined to the top of the magnet to form a magnetic gap between the top plate and the cylinder outer peripheral section. This constitution enables a reduction in the magnetic saturation generated in the bottom section of the yoke and improves the efficiency of the magnetic circuit. As a result, this constitution contributes to an improvement in the performance and the efficiency of the loudspeaker which comprises this magnetic circuit.</p> |
