close

Вход

Забыли?

вход по аккаунту

?

JPS5669995

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 JPS5669995
Description 1, title of the invention
Audio speaker diaphragm
6. Detailed description of the invention The present invention is based on the recent demand for
higher power, withstands high temperature due to heat generation due to high input, and
additionally, high performance using a material which is lightweight and has a large elastic
modulus The present invention relates to a diaphragm for an audio speaker. An audio speaker in
which a heat-resistant treated paper or a metal foil such as aluminum is molded in a diamond
shape and used as a base of a diaphragm has been put to practical use as a lightweight, highperformance speaker. The base material of these diaphragms is a material that sufficiently
withstands high temperature due to heat generation due to high power to the requirement of
high power audio speakers, and is a material having a certain degree of elasticity. However, these
substrates are also limited in heat resistance and elastic modulus, and can not meet the recent
demand for higher power audio speakers. For example, although the conventional paper quality
is heat-treated, it has a limit of slightly exceeding 200 ° C., and hence the input power is also
restricted from it. Moreover, in the case of aluminum foil, even if heat resistance is sufficient,
there is a limit by Young's modulus. Therefore, in order to meet the demand for higher-power
audio speakers, it is necessary to find one having better heat resistance and elastic modulus than
conventional materials. In view of the above-mentioned point, the present invention constitutes a
honeycomb structure from a ceramic excellent in both heat resistance and elastic modulus, and
has a structure in which a heat resistant sheet is attached to this, thereby achieving high heat
resistance and weight reduction and highness. It is an object of the present invention to provide a
diaphragm for a high-quality EndPage: single-use audio speaker capable of improving the
durability against mechanical vibration of power. Hereinafter, an embodiment of a diaphragm for
11-05-2019
1
an audio speaker 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 diaphragm
for audio speaker comprises a honeycomb structure 1 and a heat resistant sheet 2 attached to
the upper and lower surfaces. The honeycomb structure 1 has a large number of hexagonal
through holes 3 as shown in FIG. 2. The thickness X of the partition 4 is set to about 0.2 vax, and
the length Y of the side is set to about 3 m. As shown in FIG. 3, the thickness 2 of the honeycomb
structure 1 is about 2 m, and the honeycomb structure 1 is formed of a ceramic such as alumina
so as to have a porosity of about 90%. A heat resistant resin sheet 2 of about 40 μm is adhered
and integrated to the upper and lower surfaces of such a honeycomb structure 1 with a heat
resistant adhesive. Ceramic is, of course, superior to conventional paper, cloth and resin in terms
of heat resistance, but, compared to metal materials, it does not undergo main deterioration and
deterioration due to long-term use at high temperatures.
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 0.74 × 10 ′ kg / cm 2 of aluminum which is
generally used as the honeycomb metal substrate of the diaphragm. For example, forsterite,
steatite, cordierite, alumina (3, 8 x 10 'kg / cWL2), beryllia (3, 2 x 10' kg / cm2), Al-Mg spinel (2,
4 x 10 'kg / m2) and others. Both the ceramics of titanate ceramics and ordinary ceramics (more
than lX10'kg 〆 about 2) are large. The mechanical strength of the ceramic is 4000 to 5000 kg /
m 2 for alumina, 2300 kg / m 2 for beryllia, 1750 kg / cWL for steatite, 1400 kg / cIn 2 for
orsterite, 1550 k87 cm 2 for zircon, and 1400 kg / cWL 2 for titania. There is. Considering these
points and the fact that Veri IJ produces harmful substances in the manufacturing process and is
expensive, alumina, steatite, forsterite, zircon and titania are the same as the ceramic constituting
the honeycomb structure 1 and are inexpensive and easy to manufacture. preferable. These
ceramics are titanium (1, IX106 k87 cm2), beryllium (2-8 x 10 'kg / m2), and boron (4,5 x 10'
k87 cm2), which have large Young's modulus, and are practically used as special substrates of
diaphragms. Ceramics have the advantage of being easy to be formed into a honeycomb, as
compared to the fact that metals such as titanium, beryllium, boron and the like are difficult to
process in complex shapes such as honeycombs. 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 materials of ceramic, it is possible to use a high density ceramic, a ceramic
which is sintered in a fiber or needle shape, or in which the long axis direction of crystal is
oriented in one direction or plane direction. Ceramic is advantageous in that the Young's
modulus can be improved according to the direction of the diaphragm. As described in the
elevation, according to the diaphragm for audio speaker shown in the first embodiment, since the
honeycomb structure 1 is made of ceramic, heat resistance and elasticity can be improved, and a
higher output can be achieved. Also in the audio speaker of this, there is an advantage which can
exhibit high performance. FIG. 4 shows a second embodiment of the present invention.
11-05-2019
2
In this figure, the honeycomb structure 10 Vi has a large number of rectangular through holes
and is formed of ceramic so that the partition walls thereof become extremely thin. Heat resistant
sheets are formed on the upper and lower surfaces of such a honeycomb structure 10. 2 paste is
integrated. The same effect as that of the first embodiment can be achieved by the structure of
the second embodiment. 0 FIG. 5 shows a third embodiment of the present invention. In this
figure, the honeycomb structure 20 has a large number of circular through holes with different
diameters, and is formed of ceramic. The heat resistant sheet 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. The shape, size and the like of the
through holes of the honeycomb structure can be appropriately changed, and the weight
reduction may be achieved in consideration of the acoustic effect and mechanical strength
EndPage: 2 degrees and the like. As described above, according to the present invention, there is
provided a diaphragm for a high performance audio speaker capable of achieving high heat
resistance, weight saving, and improvement in durability against mechanical vibration of high
power.
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 an enlarged plan
view showing a honeycomb structure in the first embodiment, 3 is an enlarged side sectional
view of the first embodiment, FIG. 4 is a perspective view showing the second embodiment, and
FIG. 5 is a perspective view showing the third embodiment. 1.10.20 · · · · · · · · · honeycomb
structure, 2 · · · heat resistant sheet, 3 · · · shell through hole, 4 · · · partition. Patent Assignee:
Tokyo Electric Chemical Industry Co., Ltd. Attorney Attorney Takashi Takai 2EndPage: 3
11-05-2019
3
Документ
Категория
Без категории
Просмотров
0
Размер файла
11 Кб
Теги
jps5669995
1/--страниц
Пожаловаться на содержимое документа