| 摘要 |
PURPOSE:To obtain an excellent low sound reproducing capability even if only a limited speaker attaching area is provided and to reduce the man-hour for production, by dividing a diaphragm into two along an edge and using one of two divided diaphragm pieces as a drone cone. CONSTITUTION:The diaphragm is divided along an edge 4 into an inside diaphragm 2 and an outside diaphragm 3. The diaphragm 3 is supported on a frame 8 by an edge 5, and a bobbin where a voice coil 7 is wound is connected to the diaphragm 2. A damper 6 is interposed between the coil 7 and the frame 8, and a magnet 9 is arranged on the inside of the coil 7. The diaphragm 2 is used as a speaker, and the diaphragm 3 is used as the drone cone. Therefore, even if only a limited speaker attaching area is provided, an excellent low sound reproducing capability is obtained. Further, the drone cone part can be produced as a part of one speaker simultaneously, and it is unnecessary to produce the frame separately, and thus, the man-hour for production is reduced. |
