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JPS5491832

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DESCRIPTION JPS5491832
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
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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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