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BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1a and 1b are sectional views of a conventional
diaphragm, FIG. 2 is a diagram showing the vibration distribution and mode of FIG. 1, and FIG. 3
is a prior art provided with a wavy edge. FIG. 4 is a cross-sectional view showing a diaphragm,
and FIG. 4 is a plan view and a cross-sectional view showing a conventional diaphragm having a
radial wave at its end, FIG. 5 is a dome diaphragm according to an embodiment of the present
invention. It is the top view and sectional drawing which show. DESCRIPTION OF SYMBOLS 1 ииии
Dome part, 2 ииииииииииииииииииииииииииии Drive part, 4 ииииииии Clamp part, 6 ииииииииииииии Radial wave Uneven wave of
the mold, 7 ..... Wavy edge.
DETAILED DESCRIPTION OF THE INVENTION The uninvented invention relates to a domeshaped diaphragm for a speaker, whose purpose is to improve high-frequency antiresonance.
Conventionally, a dome-shaped diaphragm has been used as a diaphragm for a dome-shaped
speaker or a horn-type speaker, in order to increase the rigidity of the vibrating portion. FIGS. 1a
and 1b are the clearances, 1 is a dome portion, 2 is an edge, 3 is a drive portion, 4 is a clamp
portion, and 5 is an effective vibration radius. The edge 2 is shaped like a wave, and the number
of waves is one or more. The fault of the diaphragm with such a structure-C1 Kozukudani 9 / i
?] 2 и Noji 2 domain anti-resonance, which determines the practical limit of rebirth of heavy
duty, causing characteristic inferiority C . The cause of this high frequency anti-resonance was
experimentally determined. The peak (valley) 2a closest to the drive unit 3 of the edge 2 is a
node and the phase mode on the dome side and the edge side are just opposite in phase. It was
FIG. 2 shows this case, taking FIG. 1 as an example. It has been found that by making the peak
(valley) 2a closest to 1 drive $ 3 i out of the effective shooting radius of 5, it is possible to obtain
a diaphragm in which heavy duty anti-collision is hard to occur. The third ward is this example.
Here, the effective shooting radius is 6. When 2d1 is 1L @ diameter (voice coil diameter) and 2a2
is Franz, 1 and rr77 '-3 ░, and as it can be seen from Fig. 3 as well, it is in the vicinity of edge
20) 2b There is no mountain (valley), but when it is done to lighten the mass of the vibrating
thread, etc., when it is high chest wave number hc, even if it works, it causes no-resonance. Also,
to improve the high-frequency anti-resonance state, as shown in Fig. 4 at 9: 1, "░" yVm 2 (tC @
"1 ░ II f Ea 6 km N" 3 m-, there is a temporary movement, but this is an edge This is undesirable
because it causes deterioration in characteristics to increase the stiffness of 2 and to reduce the
displacement. The unthinking is to eliminate the above-mentioned defects and wrinkles as in the
prior art and to prevent the high frequency antiresonance without causing the characteristic
inferiority F. The following-using the surface C its real N! Explain 1vlJ. The five points of the I, '5'
and 5 'points are examples of one example of this scheme. Oh. The # example of this case is a
node within the effective oscillation radius 5. ????????????????? ???
?? A two-sided r 'evening cloth 6 is provided, and a temporary edge 7 is provided on the outer
periphery thereof so that the stiff blade 1 does not become large. With the above-mentioned
structure, it is possible to improve the high frequency antiresonance, and to have a ball
admiration that does not adversely affect the characteristics at all.
Note that the view of the radius vf and the temporary edge 7 need not necessarily coincide with
the effective radius of vibration 5, and the same effect can be obtained if it is close to the hole 9).
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