close

Вход

Забыли?

вход по аккаунту

?

JPS5669994

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 JPS5669994
Description 1, title of the invention
Audio speaker diaphragm
3. Detailed description of the invention The present invention is a high performance audio
speaker using a material which is light in weight and has a large elastic modulus, and which
withstands high temperature due to heat generation caused by high power, based on recent
demands for high power. The present invention relates to a diaphragm for use. Metal materials
have been put to practical use as diaphragm substrates for high-power, high-performance
speakers. The metal material is excellent in heat resistance, and among them, aluminum is
generally used, and as the high elasticity material, titanium, beryllium, boron and the like can be
mentioned. The base material of these diaphragms is a material of high elasticity which
sufficiently withstands the high temperature due to heat generation due to the high power to the
requirement of the high power audio speaker. However, if these substrates are used alone, their
heat resistance or elastic modulus is limited, and they can not meet the recent demand for higher
power audio speakers. For example, conventional metallic materials are degraded by long-term
use by oxidation at high temperatures due to heat generation due to high power. In addition,
aluminum, which is generally put to practical use, has a low elastic modulus and is limited in
increasing power. On the other hand, titanium, beryllium, boron and the like are high elasticity
materials, but they are expensive and the processability as the diaphragm substrate is poor, and
depending on the shape, their practical use is determined. Therefore, in order to meet the
demand for higher power audio speakers than ever before, it is not sufficient to simply use a
metal material, and it is necessary to find one having better heat resistance and elastic modulus
than conventional substrates. In addition, the structure of the diaphragm is not only a simple flat
plate, but it is also necessary to use EndPage: 1-some ingenuity. In view of the above-mentioned
11-05-2019
1
point, the present invention is a machine having high heat resistance, light weight and high
power by adopting a structure in which a ceramic thin film excellent in both heat resistance and
elastic modulus is attached to a heat resistant honeycomb structure made of metal etc. It is an
object of the present invention to provide a diaphragm for a high performance audio speaker
capable of improving the durability against a dynamic vibration. Hereinafter, embodiments of the
diaphragm for audio use according to the present invention will be described with reference to
the drawings. FIG. 1 shows a first embodiment of the present invention. In this figure, the
honeycomb structure 1 has a large number of hexagonal through holes, and is formed of a heat
resistant material such as metal foil so that the partition walls thereof become extremely thin.
The ceramic thin film 2 is integrally attached to the upper and lower surfaces of such a
honeycomb structure 1. With recent rapid progress in ceramic thin film fabrication technology,
the ceramic thin film 2 is formed by extruding, doctor blade forming, absorbing hygroscopic
sheet or sheet of ceramic slurry or paste into a sheet of paper, cloth or the like. It can be
manufactured to 150 μm or less, more preferably 50 μm or less by a sintering method, a vapor
deposition method, a thermal spraying method or the like.
Ceramics are, of course, superior in heat resistance to conventional paper, cloth and resin, but
they do not deteriorate or deteriorate due to long-term use as compared with metal materials,
even when used for a long time. Also, with regard to the elastic modulus, particularly the Young's
modulus, ceramic is larger than metal and is excellent as a base material of the diaphragm. That
is, the Young's modulus of the ceramic is larger than the Young's modulus of aluminum, which is
generally used as the honeycomb metal base of the diaphragm, 0.degree. For example, alumina
(3-8 × 10 'kg / 1 vL2), beryllia (3, 2 × 106 kg / c1 n2), A / -Mg spinel (2, 4 × 10' kg / ctn2),
forsterite, steatite, cordierite , Large quantities of titanate ceramics and ordinary ceramics (more
than IX10 'kg / cm2). In addition, the mechanical strength of the ceramic is 4000 to 5000 kg /
an2 for alumina, 2300 kg / cm2 for beryllia, 1750 (4) kg for steatite, 1400 kg / m2 for forsterite,
and 1550 kg / -1F for zircon! 2. The weight of titania is 1,400 kg / unit 2. Alumina, steatite, 7orsterite, zircon and titania are preferable as a low-cost, easy-to-manufacture ceramic as a sheet
material in consideration of these points and the fact that beryllia produces harmful substances
in the production process and is expensive. . These ceramics are titanium (1, IX10 'kg / m2),
beryllium (2-8 x 10' kg // vL2), and high metals of high Young's modulus, which are put to
practical use as special substrates of diaphragms, and porons (4, Ceramics can be easily
processed as compared with the fact that the processability of metals such as titanium, beryllium,
boron and the like is poor, which can be used as about 5 × 10 'kg / m'). In addition, the ceramic
can be used more than conventional metals because the Young's modulus is increased and the
metallic noise can be generated if the ceramic is densely sintered by sufficient sintering.
Furthermore, in addition to the selection of such material of ceramic, a ceramic using high
density ceramic, sintered in a fiber or needle shape, or orienting the major axis direction of
crystal to one direction or (5) plane direction Ceramics are advantageous in that the Young's
modulus can be improved according to the direction of the diaphragm if. As described above,
11-05-2019
2
according to the diaphragm for an audio speaker shown in the first embodiment, since the
ceramic thin film 2 is used as the sheet material to be attached to the upper and lower surfaces
of the honeycomb structure 1, heat resistance and elasticity are obtained. Thus, it is possible to
achieve high performance even in high-power audio speakers.
FIG. 2 shows a second embodiment of the present invention. In this figure, the honeycomb
structure 1o has a large number of rectangular through holes, and is formed of a heat resistant
material such as a metal foil so that the partition walls thereof become extremely thin. The
ceramic thin film 2 is integrated on the upper and lower surfaces of such a honeycomb structure
1o. Also by the structure of the second embodiment, the same effect as that of the first
embodiment can be obtained. FIG. 3 shows a third embodiment of the present invention. In this
figure, the honeycomb structure 2 o has a large number of circular through holes with different
diameters, and is formed of a heat-resistant material f 6 · EndPage: 2 such as metal. The ceramic
thin film 2 is integrated on the upper and lower surfaces of such a honeycomb structure 20. The
same effect as that of the first embodiment can be achieved also by the third embodiment. A
sheet obtained by laminating a metal foil on the ceramic thin film 2 or a metal on which the
ceramic thin film 2 is vapor deposited may be used as the sheet material. In this case, the heat
dissipation is further improved. In addition, the shape, size, and the like of the through holes of
the honeycomb structure can be changed as appropriate. Furthermore, when heat resistance is
further required, the honeycomb structure may be made of ceramic, as in the case of 0 叙,
according to the present invention, high heat resistance, resistance to weight reduction and high
power mechanical vibration. A diaphragm for a body performance audio speaker capable of
improving the flexibility is obtained.
4. Brief Description of the Drawings Fig. 1 is a perspective view showing a first embodiment of
the diaphragm for an audio speaker according to the present invention, Fig. 2 is a perspective
view showing a second embodiment, and Fig. 3 is a third embodiment. It is a perspective view
which shows an example. 1.10.20 · · · honeycomb structure, 2 · · · ceramic thin film. Patent
applicant Tokyo Electric Chemical Industry Co., Ltd. Attorney Attorney Murai Takashi EndPage:
3
11-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jps5669994
1/--страниц
Пожаловаться на содержимое документа