| 摘要 |
PURPOSE:To suppress the abnormal oscillation of low and high order of diaphragm, by providing the support of non-magnetic substance and the damper having soft material on the surface of diaphragm. CONSTITUTION:In the magnetic field consisting of the magnets 1 and 2 opposing each other and the center pole 6, the diaphragm 11 having the conductor 12 is placed. At the upper surface side of the diaphragm 11, the support 14 of non- magnetic substance is provided, which opposes with the center pole 6 at the lower surface side and has a given distance with the diaphragm 11, and the damper member 16 flexible between the support 14 and the diaphragm 11 is fixed. As the damper member 16, the material rich in the flexibility such as cloth and synthesized leather. |
