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JPS50106615

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DESCRIPTION JPS50106615
3. Patent applicant address 22nd No. 22 Nagaikecho Abeno-ku, Osaka Name (504) Sharp
Corporation Representative Saeki Asahi 4th agent, address one 22nd 22nd Noikecho Naganocho
Abeno-ku Osaka Osaka, List of accompanying documents. (1 )------------------------------------------------------------------------------------------------------------------ 1) Japanese Patent Laid-Open No. 50-1.0661.50
Published Japanese Patent No. 50. (1975) 8.22-■ Japanese Patent Application Shogo-/ ·? / 7 λ
Z Office internal reference number t 1. tI-, the specification l The name of the invention
Speaker diaphragm
3. Detailed Description of the Invention The present invention relates to a speaker shake JIl [a]
using an electric discharger-silica fiber as a diaphragm material. Generally, various conditions
required as a speaker include that one car is high, that the transient characteristic is good, that a
high sound range is extended, and i that the division vibration is suppressed and the frequency **
is flat. The vibratory plate material for a speaker satisfying these various conditions is required to
have a high Young's modulus, a strong 1 and a strong internal loss appropriately depending on
the scene. In the past, glass fibers or silica fibers containing silicon dioxide (sios) as the main
component were used alone or in combination with other natural fibers or synthetic fibers in
order to satisfy the above requirements as diaphragm materials for speakers. There is also a limit
in terms of Young's modulus and strength, and the performance as a diaphragm is also limited.
The present invention, as shown in Table 1, is a filament or staple-like alumina-silica fiber mainly
composed of dealumina (1 son) having a larger Young's modulus than a glass fiber composed
mainly of silicon dioxide. Mixed with other natural fibers or synthetic rims 1dA1c and heatmolded into a diaphragm shape. Thus, the Young's modulus and the internal loss are increased to
satisfy the conditions as a speaker diaphragm. 冑, Alumna シ リ カ silica fiber, like glass fiber, has
small frictional resistance on the surface of the fiber and mildness with other fibers. EndPage: 1
11-05-2019
1
Slippage of fibers is likely to occur and alumina is used to increase strength due to intertwining
of fibers · Add or immerse synthetic resin such as Ebokita, phenol, acryl, vinyl, styrene, silicon,
etc. to the mixture of silica fiber and other fibers to increase the adhesive strength. The physical
properties of the diaphragm such as Young's modulus, strength and internal loss can be
improved to heavy snow by adding or immersing the synthetic resin as shown in Table 1 above.
1 and 1 show the relationship between ev silica fiber fiber length and Young's modulus and fiber
length and internal loss in the speaker diaphragm C, respectively. The effect at the time of Also,
FIGS. 3 and S show the relationship between the content of alumina / silica fiber and the Young's
modulus and internal loss in the speaker diaphragm, respectively, which is apparent from FIGS. 3
and 3- As you can see, the value when including alumina / silica fiber is larger than the
compensation when only wood pulp contains no alumina / silica fiber (the content of alumina /
silica fiber is o4)!
-The maximum content of IO ginseng. FIG. 5 shows a diaphragm shape after mixing with a wood
pulp a filamentary alumina / silica fiber of single fiber diameter / 0, 14 which has been surfacepretreated with pre-caulking as an embodiment of the present invention and adding an
appropriate amount of synthetic resin. And the frequency-response characteristics of a speaker
diaphragm made of wood pulp which does not contain alumina-silica fiber manufactured by the
same method, and is shown. The solid line represents the characteristics of the speaker
diaphragm using the alumina / silica fiber according to the present invention as the diaphragm
material, and the dotted line represents the characteristics of the speaker diaphragm which
conventionally does not contain the alumina / silica fiber. As shown in FIG. 5, the speaker
diaphragm formed by mixing the alumina-silica fibers according to the present invention has a
large snowfall in both Young's modulus and internal loss as compared with the conventional
speaker diaphragm, and the speaker performance is excellent. Significant improvements can be
made.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the relationship between the
length of an alumina / silica fiber and the Young's modulus of an alumina / silica rigid diaphragm
according to the present invention. Fig. # I1 is a diagram showing the relationship between the
alumina-silica fiber length and the internal loss of the diaphragm according to the present
invention. FIG. 3 is a diagram showing the relationship between the presence of alumina / silica
fibers and the Young's modulus of the diaphragm according to the present invention. Fig. 13 is a
graph showing the relationship between the internal content and the silica content of the
diaphragm according to the present invention. FIG. 11JII is a diagram showing a frequencyresponse line of a speaker using the diaphragm according to the present invention and a speaker
using the conventional 11IIIh + 1 [. EndPage: 2
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2
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