JPS5093138

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DESCRIPTION JPS5093138
Name of pref. + Kana invention inventor 5 patent applicants address Marunouchi-Chiyoda-ku,
Tokyo-Chome No. 5 No. 1 in Hitachi, Ltd. [in Japanese] [Office] Japan Patent Office ■ JPA 5093138 Organization in the Office No. 乙 4-1) S Tata specification Title of the Invention Multilayer
Vibrator for Speakers Title of the Invention Laminated Vibrator for Speakers
Claim 1 (laminated diaphragm of the laminated diaphragm for a speaker)
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a laminated diaphragm for a speaker having a sand-in cross-section structure. The
conventional laminated diaphragm for a speaker, which has a sand-in-section cross section, has
only one type of adhesive for bonding the laminated material constituting the diaphragm, and the
thickness of the coating film is also uniform over the entire surface. Internal loss was also
uniform over the entire surface. Therefore, it was impossible to uniformly suppress the peaks of
those split resonances different in the resonance frequency, the degree of resonance and the
place where the resonance occurs in the diaphragm of a speaker having several resonance
points. To solve this the internal loss of the diaphragm depending on the position, degree and
frequency of resonance to be suppressed. However, this problem can not be solved if the internal
loss of the diaphragm is uniform over the entire surface as in the prior art. An object of the
present invention is to provide a laminated diaphragm for a speaker capable of partially
changing the internal loss of the diaphragm and uniformly suppressing its split resonance by
eliminating the above-mentioned drawbacks of the prior art. Fig. 1 tri In the characteristic
diagram showing the principle of the present invention, the internal loss of the laminated
diaphragm having a saton-ditch structure in cross section as shown in the figure is the Young's
modulus and adhesion of the adhesive bonding the laminated materials constituting the
diaphragm. The thickness of the coating film of the agent varies with 1: 0.05, 2: 01, 3: 0.15, 4:
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0.2), and the Young's modulus is: · · · EndPage: 1 small 11! Also, the thicker the film thickness,
the larger the internal loss after lamination. . The present invention focuses on this point to
impart an internal loss of a desired size to a desired portion of the diaphragm by changing the
Young's modulus of the adhesive and i changing the thickness of the coating partially. Figure 2 is
a cross-sectional view of a conventional diaphragm, in which the thickness of the adhesive and
the coating film of the adhesive is reduced over the entire surface of the diaphragm. It is uniform.
5 is an aluminum alloy plate having a thickness of 0.1 u, 6 is an adhesive based on a
synthetic resin elastomer, and 7 is a hard foam vinyl chloride having a thickness of 2 B and made
of sandell wood. 3 and 4 are cross-sectional views of the imaging plate according to the present
invention, and FIG. 3 is a view showing that the thickness of the adhesive coating is uniform over
the entire surface of the imaging plate. It is what changed. 6a is an epoxy resin adhesive, 6b is an
ionomer resin adhesive, and 6C is a synthetic resin elastomer. The Young's modulus of each dried
film is IX1011 dyn / an ', 6a.
6bが6XIQ8dyn/am9および6Cが4×フQ6 d7n/cm である。 And the
thickness of each adhesive coating. Both are 50μ, 6a and 6b boundaries are straight pass, "-\.
Diameter 8? ? In the circumference of, the boundary of 6b and 60 is diameter 15P51 / ,! It is the
circumference of the deviation φ. Fig. 4 shows that the adhesive is a synthetic resin elastomer.
There is a partial change in the thickness of the coating film, "the thickness of each portion is
50μ for 601, 6c, 100". μ and 6Q8 are 150 μ. 601.1 + 1 FIG. 5 shows the sound pressure
frequency isotropy of the speaker using each diaphragm shown in FIG. 2, FIG. 3 and FIG. る。
Characteristic curve 8 in the figure is the conventional vibration l) plate shown in FIG. 2, and
curves 9 and 1Q are shown in FIGS. 3 and 4. In the case of the diaphragm according to the
present invention. As an application example of the present invention, even when fine particles of
organic or inorganic material or fibrous particles are mixed into the adhesive in a partial ratio of
1 / [1], the same as in the above-mentioned example, It is possible to obtain the effects of It is
also the most rational application of the present invention to partially change the compounding
ratio of the curing agent, "" or plasticizer using a two-component adhesive. As apparent from FIG.
5, by partially changing the Young's modulus of the adhesive and the coating thickness of the
adhesive, the internal loss of each part of the diaphragm suppresses the peak of the split
resonance. Working effectively, the individual resonance peaks are uniformly improved. In
particular, in the case of changing the Young's modulus of the adhesive, the peak of resonance is
on the high frequency side by using an adhesive having a high yanking rate at the center of the
diaphragm, ie, the portion to which the driving voice coil is connected. By moving to the
diaphragm's piston movement zone, it is possible to gain additional benefits that the door
becomes wider.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a special view of a laminated diaphragm
showing the principle of the present invention, FIG. 2 is a sectional view of a conventional
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diaphragm, and FIGS. 3 and 4 are diaphragms according to the present invention. FIG. 5 is a
sectional view of sound pressure frequency characteristics of a speaker using a conventional
diaphragm and a diaphragm according to the present invention. '1: Adhesive film thickness [], 0:
IIL II characteristics 2: u' n 'O,' IB 〃 5: n, ua, 15 m 〃 4: adhesive film thickness 0.2 特性5:
Aluminum alloy plate 6: Adhesive 6a: Epoxy resin adhesive 6b: Ionomer resin adhesive C 6C:
Synthetic resin rigid film 6C1: Synthetic resin thickness 50μ synthetic resin elastomer field 6C ',
〃 100μ 〃 6C8; 150 ニ m thick synthetic resin digistomer 7: Sand-inch material 1) End Page: 2
pages Fig. 1 1 Young well (dkrly- ") between Bony (KHz) attached documents list (+) specification
One book (2) One drawing (3) One letter of attorney (4) Japanese patent application 1 copy good
2 good = 4 EndPage: 3
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