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JPS54163638

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DESCRIPTION JPS54163638
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a general horn
speaker, FIG. 2 is a top view of a dome-shaped diaphragm used in a conventional horn speaker,
and FIG. Fig. 4 is a top view of the main body of the dome-shaped diaphragm used in the horn
speaker according to the present invention, Fig. 5 is a top view of the damping material, Fig. 6 is
a top view of the dome-shaped diaphragm, and Fig. 7 is the same. It is a half section front view.
14 иии и и и Dome shaped diaphragm main body, 15 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и domes, 17 и и и и и.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horn speaker
using a dome-shaped diaphragm, and in particular to eliminate distortion due to non-linearity of
the edge of the dome-shaped diaphragm, and to reproduce good Hi-Fi reproduction. It is intended
to be realized. FIG. 1 shows a cross-sectional view of a general horn speaker. ?????????
??????? The voice coil 4 is inserted into the magnetic gap 7tJ6) / 2 of the magnetic
circuit formed by the poled plate 3, and the voice coil 4 is held by the dome-shaped diaphragm 6.
An edge portion of the peripheral edge of the dome-shaped diaphragm 5 is fixed on the top plate
1 by an edge fixing ring 6. An equalizer 7 has a spherical portion approximately equal to the
dome sphere radius of the dome-shaped diaphragm 6 on the bottom, and operates as a
transformer with small holes 8 provided therein, and the sound from the dome-shaped
diaphragm 6 Power is transmitted into the throat of horn 9. The conventional dome-shaped
diaphragm 6 in the horn speaker having such a configuration comprises a dome portion 10 and a
voice coil joint portion 11 ░ edge portion 12 as shown in FIGS. The outer peripheral edge
portion 13 is joined and fixed to the edge fixing ring 6, so that a signal is applied to the voice coil
4, and when the dome-shaped diaphragm 6 vibrates up and down, the edge portion 12 bends up
and down. Movement is performed, but in this case, the edge portion 12 needs to be expanded
and contracted in the circumferential direction. However, since the conventional dome-shaped
vibration plate 5 has the movable portion of the machining portion 12 in the entire
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circumferential direction, it is difficult to absorb the expansion and contraction in the
circumferential direction, and as a result, the dome The linearity of the upper and lower
amplitudes of the diaphragm 6 is deteriorated, and there is a disadvantage that the vibration
system distortion near the fO is large. The present invention seeks to eliminate the abovementioned conventional drawbacks. The vibrating portion of the horn speaker according to the
present invention will be described with reference to FIGS. FIG. 4 shows a dome-shaped
diaphragm main body 14 according to the present invention, which is made of a metal such as
aluminum or titanium or a resin, cloth or the like. A different point from the conventional domeshaped diaphragm 6 is that a part and a fixed part of the edge movable part are left as a plurality
of ribbon-shaped edge parts 15 in the radial direction, and the other parts are removed. 16 is a
dome part. FIG. 6 shows a ring-shaped damping member 17 attached to such a dome-shaped
diaphragm main body 14 so as to be non-air-permeable with a soft material such as non-woven
fabric etc. It is easy to adhere to the dome-shaped diaphragm main body 14 by applying it.
6] is a top view of the dome-shaped diaphragm constructed by sticking the damping material of
the present invention, 7 to the dome-shaped vibration plate 4-plate main body 4, and FIG. 7 is the
horn speaker It is principal part sectional drawing of a vibration part. That is, the ribbon-shaped
edge portion 15 of the dome-shaped diaphragm main body 14 is joined onto the edge 1
rectangular ring 6, and further, the above-described damping material 17 is adhered onto the
ribbon-shaped edge portion 15. It is. Furthermore, as another embodiment of the present
invention, a part of the damping material 17 is cut out and the part is joined with and joined to
the edge notch of the dome-shaped diaphragm main body 14, and a vent is provided in the edge,
It is also possible to flatten the sound pressure characteristics. According to the configuration of
the fourth invention as described above, since the edge movable portion is in the shape of a
ribbon, expansion and contraction in the circumferential direction does not occur at the edge
portion when the dome-shaped diaphragm moves up and down. Vertical deformation motion of
the edge can be performed, the linearity of the amplitude of the edge can be remarkably
improved, and the distortion caused by the vibration system near the fo can be reduced to half or
less than that of the conventional one. t "и A very large effect can be obtained on ? regeneration.
и Real y,-y 6 It is a thing of great quantitative value.
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