close

Вход

Забыли?

вход по аккаунту

?

JPS56131297

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS56131297
Description 1, title of the invention
Speaker diaphragm
3. Detailed Description of the Invention The present invention relates to a speaker diaphragm
that is lightweight, has a high specific elastic modulus, and has a large internal loss, and is
particularly suitable as a diaphragm for a high-pitched speaker. A schematic side cross section of
a conventional speaker diaphragm of this type is shown in FIG. In FIG. 1, reference numeral 1
denotes a metal base made of a material having good plasticity and caloricity previously formed
into a desired shape, and reference numeral 2 denotes a hard film formed on the surface of the
metal base 1. As the metal substrate 1 and the hard film 2, for example, according to JP-B-5345134, titanium foil is used as the metal substrate 1, and the surface of the titanium foil is made
directly from a gaseous state by a deposition method, etc. It is deposited to form a hard film 2. In
the conventional speaker diaphragm having such a cross-sectional structure, the thickness 、 11
of the metal base 1, the Young's modulus is El, the bore-tsunon ratio is νl, and the thickness kh
of the hard film 2 and the Young's modulus are E 2, The bending stiffness as these composites is
obtained if the pore-tunneling ratio is 22, but the bending stiffness of only the metal substrate 1
is the bending stiffness when only the kDh hard film 2 is present without interposing the metal
substrate 1 If t'D2, then 12 (1-.nu.l) EndPage: 1, so 1)> D1 + D2, and it is E, <4, .nu.l,-, I /,
.noteq.0.3. The rigidity as the above composite is greater when the metal substrate 1 or the hard
film 2 is present alone. Further, assuming that the equivalent blow factor as a complex is iE and
the equivalent Poisson's ratio is ν, Young's modulus E is also represented by the case where the
metal substrate 1 or the hard film 2 is present alone. It becomes bigger. Furthermore, as the hard
film 2 is usually made of a material having a very large ratio Vρ between the Young's modulus E
and the density よ う like the above-mentioned zonone etc., the value of Vρ of the above
11-05-2019
1
composite is smaller than the value of the hard film 21 body. However, the value can be larger
than that of the metal base 11. Here, since a film of a hard substance such as poron is usually
formed by direct deposition as a solid from a gas state by vapor deposition or the like, the hard
substance alone must be used to obtain a thickness having a necessary strength as a speaker
diaphragm. In the case of the complex as described above, the productivity is higher. However, in
the case of such a composite structure, it is important that the adhesion between the metal
substrate 1 and the hard film 2 is important. The equipment for setting the condition becomes
complicated and expensive. Therefore, as described in JP-A-51-77220, JP-A-51-140619, etc., a
titanium foil is used as the metal substrate 1, and boron atoms are diffused from the surface
thereof to form a single surface. It is considered to form a similar polonized layer and use it as a
hard coating 2.
Fig. 2d is a side cross-sectional view of an apparatus for forming such a zolonide layer, in which
1 is a metal substrate formed by forming a titanium foil, 3 is a composite powder of Zoron and
other various additives, and 4 is a heat-resistant container for housing the Zoronization agent 3
in which the metal substrate 1 is embedded, 5 is a heater for heating the flameproof container 4,
6 is a heat insulating material, and 7 is a vacuum tank. That is, first, the inside of the vacuum
chamber 7 is evacuated to a vacuum state, and the heater 5 is energized to heat the heatresistant container 4. When the heat-resistant container 4 is heated, the temperatures of the
zonating agent 3 and the metal substrate 1 also rise, and when it reaches about 900 ° C. to
1300 ° C., the zonone atoms diffuse from the surface of the metal substrate 1 into titanium, A
Zolonide layer is uniformly formed on the surface of the substrate 1. In addition, since poron and
titanium are easily oxidized particularly at high temperatures, it is particularly important to set
the environment in a vacuum state. The hard film 2 formed by the boronide layer formed as
described above is formed by changing the surface of the original metal substrate 1 and is
therefore excellent in mutual adhesion, and it is necessary to evaporate the polon. There is an
advantage that the heating temperature may be relatively low because it does not exist. However,
even in such a case, since heating of the metal substrate 1 is performed through the heatresistant container 4 and the powdery soronization agent 3 having poor thermal conductivity,
there is a disadvantage that the time required for temperature rise is long. In addition, the
temperature of the heat-resistant container 4 and the heater 5 needs to be higher than the actual
heating temperature of the metal substrate 1, and therefore, there is a disadvantage that an
expensive heat-resistant material must be used for the heat-resistant container 4 and the like.
The present invention was made in order to eliminate the above-mentioned drawbacks, and it is
an entire object of the present invention to provide a loudspeaker diaphragm having a high
productivity and a ratio Vρ between the Young's modulus E and the density ρ.
Speaker diaphragm
11-05-2019
2
The present invention will be described in detail with reference to FIGS. 3 and 4 below. FIG. 3 is a
schematic side sectional view showing an embodiment of the speaker diaphragm according to
the present invention, in which 1 is a material having good plastic workability which is
previously formed into a desired shape, in this case a metal substrate made of titanium foil, Is a
hard diffusion region formed discontinuously on the surface of the metal substrate 1. Here, the
discontinuous hard diffusion region 8 is formed by discontinuously diffusing atoms of a
substance different from that of the metal substrate 1, in this case, a poron, on the surface of the
metal substrate 1. And, an apparent EndPage: 2 blow rate E of the surface layer portion where
the discontinuous hard diffusion region 8 of such a speaker diaphragm is present is the Young's
modulus kEs of the hard diffusion region 8 itself, the hard diffusion region in the surface layer
portion Assuming that the volume occupancy ratio eVs of 8 and the Young's modulus tl-E1 of the
metal substrate 1 itself, the relationship of E> EsVg + gt (1-Vs)... That is, as long as Es> El, the
apparent Young's modulus E is improved. Therefore, the portion where the hard diffusion region
8 of the surface layer portion is present is the same as the hard film 2 (see FIG. 1) in the
conventional diaphragm. In addition, the apparent Young's modulus E of the entire speaker
diaphragm can be improved, and the ratio ヤ ン グ between the Young's modulus E and the
density ρ can be increased. Moreover, such a speaker diaphragm can be obtained with high
productivity as described below. FIG. 4 is a side sectional view showing an example of the
apparatus for manufacturing a loudspeaker diaphragm according to the present invention. In the
figure, 1 is a metal base made of titanium foil previously formed into a desired shape, 4 is a heat
resistant container, 6 is a heat insulating material , 7 is a vacuum chamber, 9 is a carbon particle
1000 with a large diameter particle such as thermal carbon, and 5 is a longing agent, and 10 is a
heat resistance connected to an external power source. The manufacturing method will be
described. That is, as shown in FIG. 4, first, the metal substrate 1 is embedded in the carbon
granules 1000 in the heat-resistant container 4 and the inside of the vacuum chamber 7 is
evacuated to a vacuum state. Next, the carbon particles in the carbon particle 1000 cupronone
agent 9 are heated through the heating electrode 10 to heat the metal substrate 1. When the
metal substrate 1 is heated, boron atoms are diffused from the surface, but boron atoms are not
diffused at the contact portion between the metal substrate 1 and the carbon particles, and hence
the surface of the metal substrate 1 is shown in FIG. Thus, a discontinuous hard diffusion region
8 is formed and manufactured as a speaker diaphragm. In the above-mentioned embodiment,
although the case where titanium is used as the material of the metal base 1 is described,
aluminum, magnesium, iron or the like may also be used. Even if such a material is used, the
same as in the above-mentioned embodiment. effective.
As described above, according to the present invention, as the hard film on the surface of the
metal substrate 1, the discontinuous hard diffusion region 8 formed by discontinuously diffusing
atoms of different substances from the metal substrate 1 is formed. Therefore, the Young's
modulus E and the north wall of density 大 き く can be as large as in the prior art, and for
11-05-2019
3
example, the heating time can be shortened or the apparatus can be shortened by manufacturing
with a direct calorific system as shown in FIG. There are effects 75 = simplification and
improvement of productivity etc.
4. Brief description of the drawings. FIG. 1 is a schematic cross-sectional view of a conventional
speaker diaphragm of 4JA + 1, FIG. 2 is a side sectional view of the same manufacturing
apparatus for the speaker diaphragm, and FIG. FIG. 4 is a schematic side sectional view showing
an embodiment, and FIG. 4 is a side sectional view showing an example of a manufacturing
apparatus of the above speaker diaphragm. {Circle over (2)} Metal substrate, ° 2 ...
discontinuous hard diffusion region. In the drawings, the same reference numerals indicate the
same or corresponding parts. Agent Shino Nono-Age 1 Figure t2 Figure EndPage: 3
11-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
13 Кб
Теги
jps56131297
1/--страниц
Пожаловаться на содержимое документа