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JPS5179337

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DESCRIPTION JPS5179337
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side cross-sectional view of a Sveica having a
diaphragm in which metal foil or plastic is laminated on both sides of a foam, FIG. 2 is a
perspective view of a conventional diaphragm, and FIG. FIG. 10 is a perspective view of an
embodiment of the present invention, FIG. 11 is a graph showing the characteristics of the
conventional diaphragm, and FIG. 12 is a graph showing the characteristics of the diaphragm of
the present invention. l ииииии high-magnification foam, 2 ... - - ?? foil or plastic. Fig. 1 Fig. 2 1-93real opening 51-79337 (2) Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7-94-real opening 51-79337 (3) Fig. 8
Fig. 9 Figure 10 Figure 11 (Jl3) 5ml L'l OdB beat t1r ? 1 1 1 1 1-1 1 1 1 1 '! '+ J' '1111 1' Z-,
1111 1 '+ 11-nond 11. l 1 j иии, 11 l', l 1 li-J '7 11 1 + I, + 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 111 c
C II + 111 II l 1 l j ++ 1 l ?j B 1 I 11 j j j? t 111 , 1 + 1-(7 1, ,, ++ 'T:.' Iol 070 (02050 / ? C no of
5n 7 K, 2 K ff K (111 1-95-real open Sho 51-79 337 ('4) FIG. 12 (a8) I wave, HaAs beat j + f. + F 1
-4 :): 'BIi' S, ll '1111 j: 11.1 + 1 i i: 11 l '11, ltJ11 mountain jFr'; иии j: white 1 + I1, I + 11 1: 1 f 111
111: иии, 111i mountain }: Lj: ',: 11: +: jj и II l 111 1 ll l: IP% 1: 1 i :; 1-} 1' 1 f 1 brow; 'sli. . . 1-I 1111
II j1, j yt} 111 + 1; 1 1 1 1 1) Cj + 11, I1 1-?1, 1 1 No ,, 2 (75Q hemp J: Oo90 / K no h5K (H2)
1% 1
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker
diaphragm. A diaphragm for a speaker in which a thin metal foil or plastic material having large
rigidity and small density is bonded to the entire surface of both sides of a high magnification
foam can greatly increase the division resonance frequency as compared with a single foam.
However, the diaphragm made by bonding metal foil or plastic to the whole surface of this foam
has the sound pressure and swell of the speaker near its lowest divided resonance frequency j3 &
so, the sound pressure peak occurs and the high standing wave distortion or very Many occur
on-dove sp, ',. There is a defect car that the characteristic is deteriorated by N112. The purpose
of the present invention is to improve such loud noises, and to eliminate the increase in pressure
and the increase of high-order wave distortion near the lowest divided resonance frequency. .
11-05-2019
1
FIG. 1 shows a cross section V of a speaker having a diaphragm in which metal foil or plastic
material is laminated on both sides of a foam, and FIG. 2 shows a perspective view of such a
conventional diaphragm. (1) is a high magnification foam , (2) is a metal foil or plastic material
bonded to the entire surface of both sides, (3) is Magnet), (ul and (5) are yokes of the magnetic
circuit, (6) is a frame, (7) is a voice coil , (8) is a damper, (9) is a free edge of the diaphragm. In
the sound pressure frequency characteristics of a speaker using such a diaphragm, as shown in
FIG. 11, a peak of sound pressure occurs near the split resonance frequency, and harmonic
distortion also increases. The present invention is an asymmetrical combination of -sK metal foils
or plastics of at least one surface of the foam, and various embodiments of gA 5 to 10 @ are
shown in Figs. Figure and ? 5 ?? ? ? (each-mKIIl of each side of 11 or large dense [-? small3-thin gold-foil or plastic (2) pasted asymmetrically to each side Example! l'6, 7 and II! 8 shows
an example in which the same metal foil or plastic (2) is attached to the entire surface of the high
magnification foam (11 on one side, and only the other side is bonded in the -sK asymmetric
manner, FIG. 9 and FIG. FIG. 10 is an example in which the metal foil or plastic material (2) on
both sides of the embodiment of FIG. 1F6 and FIG. Gg7 is formed by a foam (one plate integrally
connected at the side end face of 11). FIG. 12 shows the frequency characteristics of the sound
pressure of the loudspeakers using these diaphragms and the second harmonic distortion
characteristics. As compared with the characteristics of the conventional diaphragm shown in
FIG. 11, as in the present invention, due to the partial bonding of the plastic, the sound pressure
peak at resonance does not fall below the divided resonance frequency of the diaphragm. And
harmonic distortion can be greatly improved.
4, a brief description of Figure l1ii Figure 1 shows a diaphragm 01i1i11 laminated metal foil or
plastic to the speaker O side cut having a diaphragm: j positive eye th'1 Figure 1F12 is a
conventional diaphragm FIG. 5 is a perspective view of an embodiment of the present invention,
FIG. 11 is a view showing the characteristics of the conventional ti-1 plate, and FIG. 12 is a view
showing the characteristics of the diaphragm of the present invention. It is. (11.-High
magnification foam, (2)-Gold leaf foil or plastic. Name of agent Attorney Yoshizaki Yuichi ') w411!
I92 I 9 ? 1 1 12 Figure ? 7 vs 3 (. / ?-^ @ ? 1,---ah114 ah 1113- ? ,. ???? 1 511th, r
stomach 3r, 1 1 ?-? ? 6 ? 6 Figure 7 ? 1 Figure 8 1 Figure 1 (l ? ?, 9 Figure Ilg 10 16 ?
79 337 second heat 14 I ? , J11 Figure Island? ', 1. ????????? 1 :; i, jllF-7, :::: lj :: n1: l:
'i', j ': jji. (: Pa и 20 # ?-) # ?! What 1 K f N (/ 4) Ill 12 all 4 111 taaaup f "" 1 'mountain. ": Hii ,,,:':
1 jjj1". ??????????? ??????????????????????????░░?
??????????? seJ # 91 / Wlka, ", 7 ░ 33 ? 7 ?-^ already heard ,,, '7 two? 6 Other
than the above ? contractors (1 place Kadoma city Ogata Kadoma 1006, Osaka Prefecture
Matsushita Electric Industrial Co., Ltd. name Satoka Kazue Sato 5
11-05-2019
2
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