| 摘要 |
PURPOSE:To improve the performance of the speaker oscillating system and to reduce the manufacture man-power, by providing a projection at a position engaged with a voice coil bobbin of a sandwich type circular speaker flat diaphragm and join the voice coil bobbin with the projection. CONSTITUTION:A projection 11 is provided for one surface member 10 of the surface members 1, 10 of a sandwich type circular speaker, and the projection 11 is mated to a voice coil bobbin 5 for engagement. Both ends of the member 1 are joined to a frame 8 via an edge 4. A voice coil 6 is wound on the bobbin 5 engaged with the projection 11, the positioning between the diaphragm and the bobbin 5 is made accurate for the improvement of the performance of the diaphragm, allowing to reduce the manufacture man-power without connecting the diaphragm and the bobbin 5 via a ring. |
