| 摘要 |
PURPOSE:To cause piston vibrations up to high frequencies and make installation design of a medium and high tone speaker easy by providing a plurality of annular diaphragm driving parts on the back of an annualar diaphragm. CONSTITUTION:Plural annular diaphragm driving portions 17a thru 17f are provided on the back of an annular diaphragm 16 and a medium and high tone speaker 18 is disposed in the through-hole 27 provided at the center of the diaphragm 16. The respective diaphragm driving portions are mechanically integrated by connecting members 19a thru 19f and the speaker 18 is also fixed to the connecting members 19a, 19c, 19e by connecting members 20a, 20c, 20e. Each diaphragm driving part comprises mounting a ring-form yoke plate 23 to the ring-form magnet 22 mounted to a yoke 21, providing a voice coil 25 and damper 26 and coupling the assembly to the diaphragm 16. Thereby, the occurrence of split vibrations is made difficult to cause piston vibrations up to high frequencies and the installation design of the medium and high tone speaker is made easy. |
