JPS52139415

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DESCRIPTION JPS52139415
Description 1, title of the invention
Diaphragm for audio equipment
3. Detailed Description of the Invention The present invention is to provide a diaphragm for an
audio device in which the increase in the weight is small and the elastic modulus is improved,
and the high frequency range inertia can be expanded. Conventionally, as a diaphragm material
for sound 111 equipment, a paper sheet of pulp is mainly used for low-mid-range regeneration
such as Uno 1 EndPage: 1, and a metal cage having a large specific elastic modulus for highfrequency regeneration, for example Affi, Ti thin films, plastic films, moldings of fiber cloth, etc.
are used. Cone paper as a diaphragm for woofer has a small rigidity and a narrow reproduction
zone, and tweeter rough @ loss plate has a large specific elastic modulus but a small mechanical
loss and it is difficult to obtain flatness of frequency characteristics. The A soft dome is used as a
remedy to the shortcoming of such gold hammer vibrating plates and the frequency is relatively
flat 4? However, there is a drawback in that the weight is increased and the efficiency is poor and
the high band reproduction band is narrow. The present invention provides a diaphragm for an
acoustic device which improves the disadvantages of such a conventional diaphragm, and is a
material in which gold having a large Young's modulus is formed by physical or chemical method
on an organic fiber or a woven fabric. By forming the diaphragm and forming a composite with
another substrate, a relatively large and lightweight mechanical plate having a mechanical loss
can be obtained. To increase the rigidity of the diaphragm, callihiro Shinmon. Although utilization
(lamination) of a gold fiber cloth etc. is considered, a weight is large and workability is bad.
According to the diaphragm for audio equipment of the present invention, it is possible to obtain
a large rigidity improvement effect even if the increase in weight is made to the amount of -iL.
Next, an embodiment of the present invention will be described. [Example 1] Surface weight i
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409 / rr? Then, 1 μ of aluminum was vapor-deposited on the surface of a 100 μ-thick silk cloth
by physical vapor deposition to obtain a metallized cloth. The metallized cloth was dome-shaped
by using a 40 μm-polyurethane / elastomer film 11 Lf 2 together with a heat mold. The off-loss
was carried out after being immersed in 10 (phenol-ha- sate) before thermoforming. Separately, a
test piece of 1 tw x 10 cm in size was prepared by the same method as a characteristic test
sample. Example 2 In the same manner as in Example 1, a sample having about 1 μm of Ti was
formed, and a dome-shaped molding and a test piece were formed. [Example 3] face weight 36 gr
/ n? A dome-shaped molding and a test piece were produced in the same manner as in Example 1
using a polyester cloth having a thickness of 81571. [Example 4] Viscoelastic properties of the
test piece (10c1n × 10on) shown in the above Example 0 in which about 1 p of T1 was vapordeposited using the cloth of Example 3 to prepare a dome and a test piece similar to Example 1 Is
shown in the $ 1 table.
In addition, in the first red, each of the experimental examples 1 and 2 uses the cloth of Example
1 ° 3 and does not perform metal deposition on this cloth. Characteristics of 1 oct n X 10 cm).
According to the present invention, it can be seen that the elastic modulus shows an increase of
26% to 40 (σ) as compared to an increase in the weight t of 6% to 7 di and it is laminated with a
film with a large loss of O or Therefore, the decrease in tan δ is slight. FIG. 1 shows the
frequency characteristics when a tweeter is manufactured for Example 1 and Experimental
Example 1 as arrows. The created tweeter was performed with a diaphragm dome diameter of
32μ. It can be seen from FIG. 1 that high frequency characteristics can be improved as well.
Table 1 [Example 6] A valve paper is used to make a cone paper having a diameter of 20 cm and
a thickness of 0.5 ai 5 [0, 55 q /,-, and the polyester cloth on which 11 is deposited as in Example
4 is used. A test piece was prepared by the same method on page 0, which was bonded to both
sides of paper and a corn skica was prepared by the usual method. 0EndPage: 2 for which the
viscoelastic property was measured by the same method. crn / 5 eC) 2 and showed an
improvement of 40 ((3, 5 × 10 10 (m / sec) 2) as compared to the original chromen f ') 5 minate
(Experimental Example 3). Original corn paper n2. ＯＸ１０１０１０（／５ｅａ）２であった。
The frequency characteristics showing the frequency characteristics of the speaker shown in FIG.
2 become flat, and it can be seen that the high frequency reproduction is expanded. The example
described a cloth, but after forming a gold lit coating on the fiber in advance, it is possible to
form a woven or non-woven fabric. It turned out that the same effect can be obtained as a cloth.
For example, when a cloth having a surface weight of 37 f / n / thickness of about 70 μ is
formed by a yarn in which about 1 μ of aluminum is formed on the surface of 4 μ fiber of
polyester, the elastic modulus is about twice that of the cloth without metal formation. I
understood it. As the gold 1111 formed on the surface, a characteristic K having a large specific
elastic modulus-for example, aluminum, chita /, beryllium, boro /, etc. is preferable, but most
metals can be used. Also, when aluminum or the like is used, coloring is possible, so that it is
possible to obtain an effect of extra-temporary design. According to the present invention, the
increase in weight can be reduced and the elastic modulus can be improved according to the
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present invention. It has the advantage of being able to expand the high-impact physical
properties of the speaker.
4. Brief description of the drawings. FIG. 1 is a sound pressure frequency characteristic diagram
of the diaphragm for the preceding apparatus and another embodiment in one embodiment of
the present invention, and FIG. 2 is another embodiment of the present invention and others. FIG.
16 is a sound pressure frequency characteristic diagram with the experimental example of FIG.
Name of Attorney Attorney Nakao et al. ３
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