close

Вход

Забыли?

вход по аккаунту

?

JP2007318611

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 JP2007318611
An object of the present invention is to provide a speaker member which has an on-off difference
and which is excellent in luminous property. A member for a speaker according to the present
invention has a first outer layer, an intermediate layer having a punching portion of a
predetermined shape, and a second outer layer. The first outer layer, the middle layer and the
second outer layer are impregnated with a thermosetting resin. At least one of the first outer
layer and the second outer layer contains a fluorescent pigment. [Selected figure] Figure 1
Speaker component and speaker
[0001]
The present invention relates to a speaker member and a speaker. More particularly, the present
invention relates to a speaker member and a speaker having excellent light emitting properties
and excellent design.
[0002]
In general, a speaker diaphragm, which is one of the members for a speaker, is required to be
light in weight, high in rigidity, and high in internal loss. In addition to these, in the case of a
speaker diaphragm for in-vehicle use in particular, it is required to be excellent in appearance
and design.
10-05-2019
1
[0003]
Therefore, a speaker has been proposed in which a light source is disposed on the back side of a
diaphragm made of a translucent film, and the intensity of the light source is changed according
to the volume to adjust the irradiation intensity of the entire diaphragm (see Patent Document 1).
. However, in such a speaker, since the diaphragm is made of a light transmitting film, the design
at the time of non-irradiation (during non-emission of the light source) is extremely insufficient.
Furthermore, since such a speaker merely reflects the light emission of the light source, the
difference in design between light emission and non-light emission is not remarkable, and the
commercial value is also low. JP 2004-7308 A
[0004]
The present invention has been made to solve the above-described conventional problems, and
the purpose of the present invention is to distinguish the difference in designability between light
emission and non-light emission (hereinafter referred to as on-off difference). It is an object of
the present invention to provide a speaker member and a speaker which are upright and have
excellent light emitting properties.
[0005]
A member for a speaker according to the present invention comprises a first outer layer, an
intermediate layer having a punched portion having a predetermined shape, and a second outer
layer, wherein the first outer layer, the intermediate layer and the second outer layer Is
impregnated with a thermosetting resin.
At least one of the first outer layer and the second outer layer contains a fluorescent pigment.
[0006]
In a preferred embodiment, the first outer layer, the intermediate layer and the second outer
layer are disposed in this order toward the sound radiation side.
[0007]
10-05-2019
2
In a preferred embodiment, the thermosetting resin contains the fluorescent pigment.
In a preferred embodiment, the average particle size of the fluorescent pigment is 1 μm or less.
[0008]
In a preferred embodiment, the second outer layer comprises twill woven fabric. In a preferred
embodiment, the second outer layer comprises a woven fabric of untwisted fibers.
[0009]
According to another aspect of the present invention, a speaker is provided. The speaker includes
the above-described speaker member and a light source disposed on the back side of the speaker
member.
[0010]
According to the present invention, by providing the first outer layer and / or the second outer
layer containing the fluorescent pigment, it is possible to obtain a speaker member and a speaker
which can make the on / off difference stand out and which is excellent in light emitting
property. As a result, a speaker member and a speaker excellent in design can be obtained. In a
preferred embodiment, the impregnated thermosetting resin also comprises the above-mentioned
fluorescent pigment. As a result, the on / off difference and the light emission can be further
improved.
[0011]
Hereinafter, preferred embodiments of the present invention will be described, but the present
invention is not limited to these embodiments.
[0012]
10-05-2019
3
FIG. 1 (a) is a schematic view of a speaker 100 according to a preferred embodiment of the
present invention, and FIG. 1 (b) is an enlarged sectional view of a portion X in FIG. 1 (a).
The speaker 100 includes a speaker member 10 and a light source 20. In the illustrated example,
the speaker member 10 is a diaphragm, but the present invention is also applicable to other
speaker members (for example, dust caps) that can contribute to design and light emission. Each
of these will be described below. For simplicity, only the diaphragm will be described as a
speaker member.
[0013]
A. Speaker diaphragm A-1. Overall Configuration of Speaker Diaphragm The speaker
diaphragm 10 has a first outer layer 11, an intermediate layer 12, and a second outer layer 13.
In one embodiment, as shown in FIG. 1 (b), the first outer layer 11, the intermediate layer 12 and
the second outer layer 13 are disposed in this order toward the sound radiation side. The first
outer layer 11, the middle layer 12 and the second outer layer 13 are impregnated with a
thermosetting resin. At least one of the first outer layer 11 and the second outer layer 13
contains a fluorescent pigment. Preferably, both the first outer layer 11 and the second outer
layer 13 contain a fluorescent pigment.
[0014]
Any appropriate thermosetting resin may be employed as the thermosetting resin. Preferred are
unsaturated polyester resins, phenol resins and epoxy resins, and particularly preferred are
unsaturated polyester resins. The unsaturated polyester resin has a high curing rate and a low
curing temperature, so that it is easy to manufacture and a speaker diaphragm having excellent
internal loss can be obtained.
[0015]
The fiber / resin ratio of the diaphragm is preferably in the range of 20/80 to 80/20, more
preferably in the range of 50/50 to 70/30. By employing the fiber / resin ratio within such a
range, a speaker diaphragm having extremely excellent internal loss can be obtained without
10-05-2019
4
lowering the Young's modulus. In addition, the generation of resin-specific sound can be
prevented. Here, the "fiber / resin ratio" is the ratio of the weight of the diaphragm before
impregnation to the weight of the impregnated resin.
[0016]
A−1. Fluorescent Pigment The fluorescent pigment may be an organic fluorescent pigment
or an inorganic fluorescent pigment, and any appropriate fluorescent pigment may be adopted
according to the purpose.
[0017]
Examples of the organic fluorescent pigment include resin particles containing a fluorescent dye.
Any appropriate fluorescent dye may be employed as the fluorescent dye. Specific examples
include basic dyes, acid dyes, disperse dyes, oil-soluble dyes, fluorescent whitening dyes and the
like. Any appropriate resin may be employed as the resin for forming the resin particles. As a
specific example, acrylic resin, melamine resin, urethane resin, polyester resin and the like can be
mentioned.
[0018]
Examples of the inorganic fluorescent pigment include particles containing a base material and
an activator. Any appropriate material can be adopted as the base material. As specific examples,
oxides such as Y2O3 and La2O3; fluorides such as CaF2; sulfides such as ZnS; oxysulfides such
as Y2O2S; Zn2SiO4, CaSiO3, BaSi2O5, and silicates such as Y2SiO5; YPO4, Ca3 (PO4) Phosphate
salts such as 2; tungstates such as CaWO 4 and MgWO 4 aluminates such as YAlO 3, Y 3 Al 5 O
12, SrAl 2 O 4, Sr 4 Al 14 O 25; titanates such as CaTiO 3, Y 2 Ti 2 O 7; zirconates such as CaZrO
3; Salts; sulfates such as CaSO4; borates such as InBO3; gallium salts such as MgGa2O4; and the
like. Any appropriate material may be employed as the activator. Specific examples thereof
include rare earth elements such as Eu, and heavy metals such as Mn, Sb, Ti, Zn, Pb, and Cr.
[0019]
10-05-2019
5
The average particle size of the fluorescent pigment is preferably 1 μm or less, more preferably
0.01 to 0.8 μm, and particularly preferably 0.05 to 0.5 μm. When the average particle diameter
is in such a range, the fluorescence of the first outer layer is hard to be clearly recognized when
light is not irradiated from a light source described later. As a result, the on / off difference can
be accentuated.
[0020]
Any appropriate method may be employed as a method of incorporating the fluorescent pigment
in the first outer layer and / or the second outer layer. Specific examples include a method of
applying the dispersion containing the fluorescent pigment to the first outer layer and / or the
second outer layer, and a method of immersing the first outer layer and / or the second outer
layer in the dispersion. Be The dispersion may comprise any suitable dispersing solvent,
depending on the fluorescent pigment used. Examples of the dispersion solvent include water,
organic solvents such as alcohol, and the like. Furthermore, the dispersion may contain any
suitable additive as required.
[0021]
In one embodiment, the fluorescent pigment may be contained in the thermosetting resin. By
incorporating a fluorescent pigment in the thermosetting resin, it is possible to further improve
the light emitting property of the diaphragm in combination with the fluorescent pigment of the
first outer layer and / or the second outer layer. The concentration of the fluorescent pigment in
the case of containing the fluorescent pigment in the thermosetting resin is preferably 3 to 10
parts by weight with respect to 100 parts by weight of the thermosetting resin.
[0022]
A−2. First Outer Layer The first outer layer comprises any suitable woven and / or nonwoven fabric. The first outer layer may be a woven or non-woven single layer, or a woven and /
or non-woven laminate. Specific examples of the woven and non-woven fabrics include cotton
woven fabrics, silk woven fabrics, linen woven fabrics and rayon woven fabrics. Preferably it is a
cotton woven fabric. This is because they are easily available and easy to process with the abovementioned fluorescent pigment. Also, the first outer layer is preferably a single layer of woven
fabric. By treating with the above-mentioned fluorescent pigment, it is possible to exhibit
10-05-2019
6
remarkably excellent light emitting property and to contribute to thinning of the diaphragm. The
weave density of the woven fabric, the weave structure, the basis weight of the non-woven fabric,
or the thickness of fibers constituting the woven or non-woven fabric can be appropriately set
according to the desired mechanical properties and appearance of the diaphragm. . For example,
when the first outer layer is a single layer of cotton woven fabric, its weave density is preferably
100 to 150 g / m <2>, and the weave structure is preferably plain weave.
[0023]
As mentioned above, in the present invention, the first outer layer 11 may contain a fluorescent
pigment. The amount of fluorescent pigment in the first outer layer may be appropriately set
depending on the purpose. For example, the fluorescent pigment may be used in a proportion of
preferably 0.01 to 5.0 parts by weight with respect to 100 parts by weight of the first outer layer
before impregnation. A commercially available white cotton woven fabric can also be used as the
first outer layer containing a fluorescent pigment.
[0024]
A−3. Middle Layer The middle layer 12 has a punching portion of a predetermined shape.
The shape of the punching portion can be appropriately selected according to the purpose.
Examples include letters, patterns, pictures, designs, marks and trademarks. By providing the
punched portion, light from the light source is transmitted through the punched portion, and the
transmitted light is transmitted through the first outer layer and / or the second outer layer, and
in one embodiment the fluorescent pigment of the impregnated thermosetting resin It emits light.
As a result, desired letters, patterns and the like according to the purpose emit light, and a
speaker diaphragm having very excellent design can be obtained.
[0025]
Any appropriate material may be used as a material for forming the intermediate layer, as long as
it is punchable and has mechanical strength (self-supporting property) with an appropriate shape
retention after punching. Furthermore, from the viewpoint of making the on / off difference
stand out, materials having excellent light blocking properties are preferable. Specific examples
of the material include canvas, cotton and the like.
10-05-2019
7
[0026]
If necessary, a metal layer may be formed on the surface of the intermediate layer. By forming
the metal layer, the light emission luminance can be further improved. Any appropriate metal
may be employed as the metal forming the metal layer. Specific examples thereof include metal
films such as Ti, TiN, SUS, Ni, Al and the like. Any appropriate method may be employed as a
method of forming the metal layer. Specifically, vapor deposition, sputtering, etc. may be
mentioned.
[0027]
A−4. Second Outer Layer The second outer layer also comprises any suitable woven and / or
non-woven fabric. The second outer layer may be a single layer of woven or non-woven fabric, or
may be a laminate of woven and / or non-woven fabric. A single layer of woven fabric is
preferred. This is because the woven structure of the woven fabric is excellent in appearance and
can contribute to thinning of the diaphragm.
[0028]
As a woven structure of woven fabric, any suitable structure (for example, plain weave, twill
weave, satin weave, a combination thereof) can be adopted. Preferably it is twill weave. It is
because it is excellent in strength and elongation and has a large weave density. As a result, the
balance between the Young's modulus and the internal loss can provide an excellent speaker
diaphragm. Furthermore, the twill woven fabric has a glossy fiber pattern, so that the design at
the time of light emission can be improved. In the case of twill weave, the weave density (weight)
is preferably 150 to 400 g / m <2>, more preferably 280 to 350 g / m <2>. If the weave density
is less than 150 g / m <2>, the fibers are rubbed by vibration, and as a result, there is a
possibility that an unnecessary sound may be generated.
[0029]
Preferably, the fibers constituting the woven fabric are non-twisted fibers (untwisted fibers). By
using non-twisted fibers, the thickness per layer can be extremely reduced, and as a result, it is
10-05-2019
8
possible to obtain a diaphragm that is lightweight and has very excellent strength. For example,
ordinary thermoplastic resin fibers are twisted, and the thickness of the woven fabric is about 1
mm when the basis weight is about 170 g / m <2>, but the thickness of untwisted polyethylene
naphthalate (PEN) fibers is The plain weave woven fabric has the same basis weight thickness of
about 0.18 mm, which is less than one-fifth. Furthermore, since the woven fabric composed of
untwisted fibers has remarkable fiber gloss and the woven fabric itself has high brightness when
exposed to ultraviolet light, the light emission property can be improved.
[0030]
The fiber thickness is preferably 800 to 1,400 dtex, although fibers of any appropriate thickness
may be employed depending on the purpose. When the thickness of the fiber is less than 800
dtex, the basis weight often decreases and the strength is often insufficient. When the thickness
of the fiber exceeds 1400 dtex, the weight increases and as a result, the sound pressure often
decreases. Any appropriate material can be adopted as the material of the fiber. Preferably,
fiberized transparent resins such as polyethylene naphthalate (PEN), polyethylene terephthalate
(PET), acryl, nylon and the like can be mentioned. PEN is particularly preferred from the
viewpoint of heat resistance and strength.
[0031]
As mentioned above, in the present invention, the second outer layer 13 may also contain a
fluorescent pigment. The amount of fluorescent pigment in the second outer layer can be
appropriately set depending on the purpose. For example, the fluorescent pigment may be used
in a proportion of preferably 0.01 to 5.0 parts by weight with respect to 100 parts by weight of
the second outer layer before impregnation.
[0032]
B. Light Source As shown in FIG. 1A, the light source 20 is disposed on the back side of the
speaker diaphragm 10. When light from the light source 20 passes through the punched portion
of the intermediate layer 12, characters, patterns and the like corresponding to the shape of the
punched portion are fluorescence in the first outer layer and / or the second outer layer or the
impregnated thermosetting resin. The pigment emits light (typically, emits bluish white light),
and a speaker excellent in light emission property, visibility and design is obtained. In the
10-05-2019
9
illustrated example, the light sources are provided only at one place on the back central part, but
the location and number of the light sources are not particularly limited as long as the light
passes through the punching portion of the intermediate layer appropriately.
[0033]
Any appropriate light source may be employed as the light source as long as the fluorescent
pigment can emit light. Preferably, it is a light source capable of emitting ultraviolet light (in
particular, near ultraviolet light having a wavelength of 300 to 400 nm). Specifically, black light
fluorescent lamps, ultraviolet light emitting diodes (UV-LEDs) and the like can be mentioned.
[0034]
The on / off of the light source may be controlled in any suitable manner. Preferably, on / off can
be controlled with a predetermined sound volume as a boundary. With such a configuration, the
volume and the timing of light emission can be matched, and the motion of sound can be visually
appealed.
[0035]
Hereinafter, the present invention will be more specifically described by way of examples, but the
present invention is not limited by these examples. In the Examples and Comparative Examples,
parts and percentages are by weight unless otherwise indicated.
[0036]
(Preparation of unsaturated polyester resin composition) A thermosetting resin composition
having the following composition was prepared. 100 parts of unsaturated polyester resin
(Nippon Catalysts Co., Ltd., N350L) 5 parts of reducing agent (Nippon Yushi Co., Ltd., Modiper
S501) 1.3 parts of curing agent (Nippon Yushi Co., Ltd., Perocta O)
[0037]
10-05-2019
10
(Production of diaphragm) White cotton woven fabric (made by Teijin Ltd., cotton fiber count:
20th, the number of strikes: 40 vertical × 40 horizontal, basis weight: 110 g / m <2>), the
characters "mu" No.11 canvas and twill woven fabric of PEN non-twisted fiber (NI Teijin Limited,
fiber thickness: 1100 dtex, weave density: 42 × 28 (book / inch), basis weight: 322 g / m <2>)
Were respectively cut into 30 cm × 30 cm. The cut cotton woven fabric, canvas and PEN woven
fabric were laminated in this order to make a substrate. The white cotton woven fabric and the
PEN woven fabric are both fluorescent pigments (UVITEX (R) OB, 2,5-bis [5-t-butylbenzoxazolyl
(manufactured by Nagase Sangyo Co., Ltd.) as a brightening agent. )) Thiophene was used. A jig in
which a circular hole of about 30 cm in diameter is opened at the center of a stainless plate of
about 30 cm × about 30 cm is used as a clamp, and the laminated base is sandwiched between
two clamps. About 5 g of the material was dropped. This base material was press-molded at 130
° C. for 30 seconds under a pressure of 1 to 3 MPa using a diaphragm-shaped matched die
mold to obtain a speaker diaphragm having a diameter of 30 cm and a thickness of 0.6 cm.
[0038]
(Fabrication of Speaker) The obtained speaker diaphragm was incorporated into an enclosure
and wired to fabricate a speaker. At that time, an ultraviolet light emitting diode (UV-LED)
(manufactured by SANDER, trade name: SDL-5N3CUV-A) was disposed on the back side of the
central portion of the speaker diaphragm to obtain a speaker as shown in FIG. The black light
was controlled to light up when the audio signal reached 1.6 V or more. When music was
reproduced using this speaker, the speaker diaphragm emitted light interlocking with the audio
signal, and the character of the punched part of the middle layer was floated up, and the design
was very excellent. In addition, at the time of non-emission (at the time of no sound signal
application and at the time of sound signal application below the threshold), the characters of the
punched out part were not recognized at all, and the speaker diaphragm had a very remarkable
on / off difference. The non-emitting state of the speaker is shown in FIG. 2, and the emitting
state is shown in FIG.
[0039]
Fluorescent pigment (SF-5000, apparent density: 0.5 to 3.5 g / cm <3>, average particle size: 0.1
to 0.4 μm, excitation) per 100 parts of unsaturated polyester resin The speaker diaphragm and
the speaker were produced like Example 1 except further containing 5 parts of wavelength: 140400 nm. When music was reproduced using this speaker, the speaker diaphragm emitted light
10-05-2019
11
interlocking with the audio signal, and the character of the punched part of the middle layer was
floated up, and the design was very excellent. In addition, at the time of non-emission (at the time
of no sound signal application and at the time of sound signal application below the threshold),
the characters of the punched out part were not recognized at all, and the speaker diaphragm
had a very remarkable on / off difference.
[0040]
The member for a speaker of the present invention is excellent in design and can be suitably
used for a speaker for any use. In particular, it can be suitably used for vehicles.
[0041]
(A) is the schematic of the preferable embodiment of the speaker of this invention, (b) is an
expanded sectional view of the X section in (a). It is a photograph which shows the state at the
time of non-light emission of the speaker of Example 1. It is a photograph which shows the state
at the time of sound emission of the speaker of Example 1. FIG.
10-05-2019
12
Документ
Категория
Без категории
Просмотров
0
Размер файла
23 Кб
Теги
jp2007318611
1/--страниц
Пожаловаться на содержимое документа