close

Вход

Забыли?

вход по аккаунту

?

JP2004274209

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 JP2004274209
To provide an electro-acoustic transducer that does not need to be irradiated with light by a
lamp, provides sufficient brightness compared with the conventional product, has a long light
emission duration, improves the rigidity of the diaphragm, and has a good sound quality. Provide
a diaphragm. A luminous body is configured to be mixed with at least one of natural pulp,
inorganic pulp and synthetic resin. This luminous body is made of an aluminate compound as a
main component and added and fired with an activator of a rare earth element, and excellent
luminance is obtained, the afterglow duration is long, and it also has a function as a ceramic and
high hardness. Therefore, the hardness of the surface of the diaphragm is also improved, and the
sound quality is improved. [Selected figure] Figure 1
Electroacoustic transducer diaphragm
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
diaphragm for an electroacoustic transducer used in acoustic equipment, and more particularly
to a diaphragm for an electroacoustic transducer which emits light brightly even in a dark place.
Conventionally, a diaphragm of this type has been disclosed in Japanese Utility Model
Application Publication No. 62-198793. This diaphragm has a structure in which a fluorescent
paint is applied to the surface of the diaphragm by spraying to emit light. Another prior art is
Japanese Patent Application Laid-Open No. 59-126,398. In this prior example, a fluorescent
material made of antimony and manganese activated calcium halophosphate which emits white
light by being excited by ultraviolet light is similarly applied to the front surface of the
diaphragm, and the ultraviolet lamp is dimmed according to the intensity of sound. It adopts a
configuration that emits light by emitting light. Furthermore, as another prior example, JP-A-8265886 exists. In this prior example, a fluorescent paint is applied to a diaphragm or an edge,
and it is irradiated with black light to emit light. SUMMARY OF THE INVENTION In each of the
11-05-2019
1
above-described prior examples, a configuration in which light is emitted by a lamp to emit light
is adopted. Therefore, there has been a problem that desired light emission can not be obtained
without irradiation with a lamp. In addition, there is also a problem that the cost is increased due
to the necessity of the lamp, and the installation space of the lamp is required. The present
invention has been proposed in view of the above, and it is not necessary to irradiate light with a
lamp in the place where it is intended, sufficient luminance can be obtained compared to
conventional products, and the light emission duration time is long. Another object of the present
invention is to provide a diaphragm for an electroacoustic transducer in which the rigidity of the
diaphragm is improved and the sound quality is also improved. According to the present
invention, the above object is achieved by using a luminous substance as a mixture with at least
one of a natural pulp, a synthetic pulp, an inorganic pulp and a synthetic resin. Achieved. That is,
the luminous material is configured to have a layer of a material mixed with at least one of
natural pulp, synthetic pulp, inorganic pulp, and synthetic resin on a part or the whole of the
surface. In this case, it is characterized in that the layer of the luminous body is provided on the
surface by the multi-layer papermaking method. Alternatively, it is characterized in that an
adhesive or paint mixed with a luminous body is applied, and a layer of luminous body is
provided on a part or the whole of the surface. This luminous body is characterized by being
formed by adding and baking an activator of a rare earth element mainly composed of an
aluminate compound.
DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view of
a diaphragm for an electroacoustic transducer according to a first embodiment of the present
invention. In this embodiment, the diaphragm 1 is made by first making the base material 2
which becomes the back surface of the diaphragm by the first paper making by the two-layer
paper making method, then making the surface layer 3 by the second paper making. ing. Then, it
is dewatered, hot-pressed and finally impregnated with a lacquer and formed through a drying
process. FIG. 2 shows an explanatory view of these manufacturing steps. As the material of the
base material 2 on the back side, a mixture of 30% by weight of NUKP at 70% by weight of 22 °
SR and a poly-para-phenylene-terephthal-amide fiber cut into 3 mm was used. . As the material of
the surface layer 3, a mixture of 60% by weight of a luminous body (G-300 series of N luminous
luminoba manufactured by Nemoto Special Chemical Co., Ltd.) with 40% by weight of bast fiber
was used. A luminous body stores in advance the light energy of a light source such as natural
light, an incandescent lamp, or a mercury lamp, and itself emits light even after removal of
external light, which is different from a luminous body (spontaneous luminous paint) . This
luminous body is formed by adding and firing an activator of a rare earth element mainly
composed of an aluminate compound. That is, this phosphor includes strontium aluminate (SrAl
2 O 4) as a host crystal, and high purity alumina and strontium carbonate are doped with rare
earth metal europium (Eu) and dysprosium (Dy) in a hydrogen atmosphere. It is formed by firing
at high temperature while being reduced, and also has properties as a ceramic. The minimum
11-05-2019
2
level at which the human eyes perceive luminance is 0.32 mcd / m <2>, but with the abovementioned phosphor, when light is applied to a sample coated with a thickness of 100 mg / cm
<2>. It has the property of maintaining an afterglow of 0.32 mcd / m <2> or more for about
2000 minutes, and is excellent in luminance and its duration. This is because the rare earth metal
such as dysprosium (Dy) is contained to increase the purity of the mixed material. The
conventional phosphors based on calcium sulfide: CaS: Bi and zinc sulfide have short luminance
and duration of light emission. In addition, although there is one in which strontium aluminate is
used as a crystal base, there are still problems in luminance and light emission duration.
This is considered to be due to the fact that the material to be mixed does not contain
dysprosium (Dy) and the purity of the material to be mixed is also low, and from such a phosphor
and SrAl 2 O 4: Eu, Dy used in the diaphragm according to the present invention When compared
with such a luminous body, according to the present invention, the luminance is high enough to
be visible all night, and the light emission duration is long, and has excellent design. The
presence or absence of this designability is a commercially important factor. That is, when the
product with low designability is compared with the product with high designability in the same
product, the user naturally selects the latter, and the designability leads to so-called industrial
applicability. In addition, since the phosphor is an oxide (ceramic) having alumina as a main
component and has high hardness, the hardness of the surface of the diaphragm 1 is also
improved. The material of the surface layer for mixing the above-mentioned luminous body may
be mixed with at least one of natural pulp, synthetic pulp and inorganic pulp. In the illustrated
example, the entire surface layer 3 is a layer including a luminous body, but may be a part.
Furthermore, a diaphragm may be manufactured by a multilayer paper-making method of two or
more layers, and the whole or a part of the surface layer 3 may be made a layer including a
luminous body. The diaphragm 1 composed of the two-layer paper making method or the
multilayer paper making method of two or more layers can be easily produced by a known
suitable paper making apparatus. Further, the shape of the diaphragm 1 is not limited to a cone
shape, and may be a dome shape, a flat shape, or any other appropriate shape. Embodiment 2 In
the above-described first embodiment, the case where the diaphragm of the layer in which the
surface layer 3 includes the luminous material is manufactured by the two-layer paper making
method or the multilayer paper making method has been described. A luminous body may be
added to form a diaphragm capable of emitting light by an injection molding method. Third
Embodiment FIG. 3 shows a third embodiment of the present invention. In this embodiment, on
the surface of diaphragm base material 2 made by papermaking, a phosphor is added to a
synthetic resin to make a film-like one, which is integrated by heating and welding, and a surface
layer is made of a phosphor. It is assumed to be 3A. EXAMPLE 4 Producing a diaphragm that can
emit light even if a layer of a luminous material is provided by printing on a part or the whole of
the surface of a diaphragm made of a synthetic resin by injection molding or a papermaking
diaphragm. Can. EXAMPLE 5 A phosphor can be added to the adhesive, which can be applied to a
part or the whole of the surface of the diaphragm to make the diaphragm emit light.
11-05-2019
3
EXAMPLE 6 A phosphor may be added to a paint, and the paint may be applied to a part or the
whole of the surface of the diaphragm to provide a layer of phosphor, thereby causing the
diaphragm to emit light. As described above, according to the present invention as set forth in
claims 1 and 2, since it comprises a luminous body which emits light by the afterglow due to the
luminous effect per se, it is possible to irradiate light from a separate lamp etc. It is possible to
make it emit light. In the multilayer papermaking method according to the third aspect, it is
possible to easily provide a layer of a high concentration of phosphor on only one surface, which
is easy to manufacture, and according to this diaphragm, the phosphor Sufficient afterglow can
be obtained. Also in the diaphragm according to claim 4, the same effect as described above can
be obtained. In addition, since the luminous body used in the present invention is a ceramic, the
surface hardness is increased and the bending rigidity is improved, so that the distortion is
reduced and the sound quality is improved in addition to the design effect. BRIEF DESCRIPTION
OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view of a diaphragm according to a
first embodiment of the present invention. FIG. 2 is an explanatory view of a manufacturing
process of the first embodiment of the present invention. FIG. 3 shows a schematic crosssectional view of essential parts of a third embodiment of the present invention. [Explanation of
mark] 1 diaphragm 2 diaphragm base 3 surface layer 3A layer which includes luminous body
11-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
13 Кб
Теги
jp2004274209
1/--страниц
Пожаловаться на содержимое документа