| 摘要 |
PURPOSE:To improve the heat dissipation of a high sound speaker unit to realize a high power input resistance and to obtain a thin speaker system low in its entirely, by providing a cup-shaped inner circumference frame for a yoke whose cross section is an L-spahed part spreading toward the outside, and in its inner part a collar is provided. CONSTITUTION:A high sound speaker unit has plates 5, yoke 7 bonded on the top and bottom of a magnet 6, a frame 4 fixed on a plate 7, into which a flat diaphragm 2 attached with a voice coil bonded with an edge is placed inside and bonded. A low sound speaker unit has plates 15 a yoke 17 bonded on the top and bottom of a magnet 16, bonded, an outer circumference plate 14 and a cup- shaped inner circumference frame 18 tightened with screws 19 and 20, a voice coil with a damper bonded is placed inside a magnetic field part, and the damper 12 is bonded on the frame 14. Lastly, a ring-shaped flat diaphragms 9 bonded with edges 10a and 10b are attached to the outer frame 14 and inner frame 18. A high sound speaker unit 1 is placed inside the frame 18 of a low sound speaker unit 8 and is fixed from rear side of the frame 18 with a screw 21. |
