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JP2007267179

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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 JP2007267179
The present invention relates to a method of manufacturing a paper making part for a speaker
used in various audio equipment, and to provide a method of manufacturing a paper making part
having a high degree of freedom in adjustment of characteristics and sound quality and high
productivity. To aim. A method of manufacturing a papermaking part for a speaker according to
the present invention includes mixing a material and a liquid, and applying a pressure to a mixed
solution obtained in the mixing step and causing a material to collide with a wall after passing
through an orifice. This process is realized by the fine-graining process and the paper-making
process including this finely-divided material, so production time can be shortened even though
it is a papermaking part, and the characteristics as a speaker and the freedom of adjustment of
sound quality are improved. It is possible to provide a large speaker papermaking component
with high productivity and to realize a low speaker price. [Selected figure] Figure 1
Method for manufacturing speaker papermaking parts, speaker papermaking parts manufactured
by this manufacturing method, speaker
[0001]
The present invention relates to a method of manufacturing a speaker papermaking component
used for various acoustic devices, and a speaker papermaking component manufactured by the
manufacturing method.
[0002]
With respect to recent electronic devices such as audio devices and video devices, performance
has been dramatically improved as compared with the past, due to remarkable advances in digital
technology.
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1
[0003]
With the improvement of the performance of the electronic devices, the performance
improvement of the speakers used for these electronic devices is strongly demanded from the
market.
[0004]
With regard to the loudspeakers whose performance improvement is strongly demanded by the
market, it is essential to cope with the improvement of the performance of the vibrating parts
centered on the diaphragm which occupies a large weight which determines the sound quality
among the loudspeaker components. It is.
[0005]
As part of measures to improve the performance of vibration parts centered on this diaphragm, it
is extremely important to create sound and characteristics that satisfy the user needs required
for each field and each application. There is.
[0006]
It is a papermaking component that has the advantage of being able to finely adjust the
characteristics of the speaker and the sound quality that can realize the creation of sound and
the creation of characteristics that satisfy these user needs, and the development of this
papermaking component has attracted attention.
[0007]
A conventional method of manufacturing a papermaking part will be described with reference to
FIG. 7 using a diaphragm as an example.
[0008]
FIG. 7 is a process chart showing a conventional method of manufacturing a speaker
papermaking diaphragm.
[0009]
As shown in FIG. 7, the material of the speaker diaphragm for paper making is put into a waterfilled beater and finely beaten in a beating process over several days.
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2
[0010]
Next, this beaten material is machined into a mold and a wire mesh disposed thereon by a paper
making process, and only water is discharged, and the material is formed into a shape as a paper
making diaphragm for a speaker. .
[0011]
Next, in a pressing step, the material of the deposited speaker papermaking diaphragm is heated
and pressurized to evaporate the remaining water.
[0012]
Next, in the processing step, the outermost periphery which becomes unnecessary and the
central hole for inserting the voice coil are punched and processed by a mold.
[0013]
Thus, the conventional speaker diaphragm for a speaker is completed.
[0014]
Although the process of the press diaphragm has been described above, there is also a
manufacturing method as an oven diaphragm so-called non-press diaphragm in which drying is
performed for about 1 to 2 days without pressing.
[0015]
Further, although the above description has been made on the speaker sheet making diaphragm,
the sub cone and the dust cap, which are the speaker sheet making parts other than the
diaphragm, are also manufactured by the same manufacturing method.
[0016]
As prior art document information related to the invention of this application, for example,
Patent Document 1 is known.
10-05-2019
3
Japanese Patent Application Laid-Open No. 63-196790
[0017]
In the audio and video industries, while the drastic improvement in performance has been
realized due to the remarkable advances in digital technology mentioned above, the trend toward
price reduction of their products is strong and they are used for electronic devices such as these
audio devices and video devices. The market demand for lower prices is also significant for
[0018]
The conventional speaker vibrating parts which can satisfy user needs are mainly paper making
parts formed by making pulp materials.
[0019]
With regard to papermaking parts, their physical property values can be varied within a large
range and in detail, so that they have the advantage of being able to finely adjust the speaker
characteristics and sound quality, while the beating process is a drawback of the papermaking
parts manufacturing method. The problem is that it takes a lot of time to
[0020]
The present invention is intended to solve the above-mentioned problems, and it is an object of
the present invention to provide a method of manufacturing a speaker papermaking component
capable of shortening the manufacturing time while being a papermaking component.
[0021]
That is, an object of the present invention is to provide a speaker papermaking component
having a large degree of freedom in adjustment of characteristics and sound quality as a speaker
with high productivity.
[0022]
In order to solve the above problems, the present invention applies a pressure to the mixed
solution obtained in the mixing step of the material and the liquid, and the mixed solution
obtained in the mixing step, and causes the orifice to pass. Loudspeaker realized by the process
of refining the material to be subsequently collided with the wall of the vessel, the process of
making paper by including the finely divided material obtained by the process of refining, and
the process of processing the shape of the paper component obtained by the process of
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papermaking It is a method of manufacturing papermaking parts.
[0023]
According to this manufacturing method, it is possible to prepare a material for papermaking in a
short time, and to provide a method for manufacturing a speaker papermaking component
capable of shortening the manufacturing time while being a papermaking component.
[0024]
In the method of manufacturing a papermaking part for a speaker according to the present
invention, the step of mixing the material and the liquid, and refining of the material to be
collided with the vessel wall after passing pressure through the orifice obtained by applying
pressure to the mixed liquid obtained in the mixing step This process is realized by the process,
the papermaking process of making paper by including the finely divided material obtained by
the refining process, and the shape processing process of the paper making part obtained by the
paper making process, so that the manufacturing time is It is possible to establish a method of
manufacturing an excellent speaker papermaking part that can shorten the
[0025]
Therefore, it is possible to provide a speaker papermaking component having a large degree of
freedom in adjusting the characteristics and sound quality of the speaker with high productivity,
and to reduce the price of the speaker, and its industrial value is extremely large. is there.
[0026]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0027]
First Embodiment The first to fourth aspects of the present invention will be particularly
described with reference to the first embodiment.
[0028]
Here, as a speaker papermaking component, an example of a speaker diaphragm will be
described with reference to FIG.
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[0029]
FIG. 1 is a process chart showing a method of manufacturing a speaker diaphragm according to
an embodiment of the present invention.
[0030]
As shown in FIG. 1, the material of the speaker diaphragm is introduced, and in the mixing step,
the material and the liquid are mixed to obtain a mixed solution.
[0031]
Next, in the refining process, pressure is applied to the mixed solution obtained in the mixing
process, and after passing through a small orifice, it is made to collide with the wall of the vessel
at high speed and then decelerated to give a shearing force to refine the material.
[0032]
Next, in the papermaking process, the material containing this micronized material is machined
onto a mold and a wire mesh disposed thereon, only water is discharged, and the material is
deposited to form a diaphragm for a speaker. Shape it.
[0033]
Then, in the pressurizing step, the deposited speaker diaphragm material is heated and
pressurized to evaporate the remaining water.
In addition, this pressurization process is not essential.
[0034]
Next, in the shape processing step, the outermost peripheral portion which becomes unnecessary
and the central hole portion for inserting the voice coil are punched and processed by a mold.
[0035]
Thus, the speaker diaphragm for a speaker according to the manufacturing method of the
present invention is completed.
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[0036]
Although the above describes the process of the press diaphragm, it is the same as the oven
diaphragm so-called non-press diaphragm in which the pressing process is the same except for
the pressing process, that is, drying for about 1 to 2 days without pressing. It is good also as a
manufacturing method of.
[0037]
Here, in the material refinement process, the refinement process may be repeated until desired
refinement can be achieved not only once.
[0038]
As described above, by achieving the desired refinement by repeating the process of refining the
material, it is possible to finely adjust the sound quality by obtaining a high precision
papermaking diaphragm, and a speaker that can further satisfy market needs and user needs.
Can be realized.
[0039]
Moreover, since the miniaturization can be promoted by setting the pressure in the
miniaturization step to 10 MPa or more, the miniaturization step can be completed in a short
time.
[0040]
Therefore, even if the above-described miniaturization process is repeated, it can be completed in
a short time, so that the production efficiency can be improved.
[0041]
In addition, although water is generally used as a liquid to be mixed with the material, this liquid
may contain an alcohol, or may be used as an alcohol alone.
[0042]
In this way, by using an alcohol, it is possible to prevent decay of the material, and because of its
good volatility, it is possible to shorten the evaporation time of the alcohol or a liquid such as
water containing alcohol, and the production efficiency Can be improved.
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[0043]
As described above, the refining process, which is a feature of the manufacturing method of the
present invention, repeats the same operation over several days using a rotating equipment by a
motor such as a beater, refiner, or mixer which is a conventional refining process. It is not a
manufacturing method to refine the material finely.
[0044]
It is possible to miniaturize in an instant by this micronization process, and to shorten the
production time of the speaker diaphragm for papermaking.
[0045]
Therefore, it is possible to establish a method of manufacturing an excellent speaker diaphragm
that can shorten the manufacturing time while being a papermaking diaphragm.
[0046]
As described above, the manufacturing method according to the present invention can provide a
speaker papermaking diaphragm with a large degree of freedom in adjusting the characteristics
and sound quality of the speaker with high productivity, and can realize the price reduction of
the speaker. be able to.
[0047]
Although the speaker diaphragm has been described above, in addition to the speaker
diaphragm, the papermaking component also includes a speaker sub cone and a speaker dust
cap, which can be manufactured by the same manufacturing method, and the same effects can be
obtained. Can be demonstrated.
[0048]
Therefore, the description of the speaker sub cone and the speaker dust cap will be omitted.
[0049]
Second Embodiment The invention according to the fifth and sixth aspects of the present
invention will be described below with reference to a second embodiment.
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[0050]
FIG. 2 is a process chart showing a method of manufacturing a speaker diaphragm according to
an embodiment of the present invention.
[0051]
About the contents similar to Embodiment 1, about FIG. 2, it abbreviate | omits the description
and demonstrates.
[0052]
As shown in FIG. 2, the difference from the first embodiment is that an explosion process is
further provided before the mixing process.
[0053]
This explosive crushing process is different from a series of beating processes from material
input which requires several days schedule as described in the prior art to a papermaking
possible state, and the material is finely divided by a pressure difference instantly. It is a method.
[0054]
The blasting process places the material in a container, closes the container and applies pressure
to the interior of the container to apply high pressure to the material.
Next, the container to which pressure is applied is momentarily opened and brought into a
normal pressure state, whereby the material is finely divided by the rapid expansion of the
elevated pressure inside the material.
[0055]
In addition, by making this explosion process steam explosion, it is possible to make the
pulverization more surely and efficiently.
[0056]
Further, the composition of lignin, hemicellulose, and cellulose can be controlled by the steaming
conditions, and a method of manufacturing a speaker diaphragm with higher accuracy can be
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obtained.
[0057]
Therefore, even if this explosion process is added, high productivity can be maintained, and the
miniaturization process can be controlled in more detail, and the characteristic as a speaker and
the freedom of adjustment of sound quality are further increased. be able to.
[0058]
As described above, it is possible to establish an excellent speaker diaphragm manufacturing
method capable of shortening the manufacturing time despite being a papermaking diaphragm,
and the degree of freedom in adjusting the characteristics of the speaker and the sound quality is
extremely large. The speaker diaphragm can be provided with higher productivity, and the price
of the speaker can be reduced.
[0059]
Third Embodiment The invention according to the seventh to fourteenth aspects of the present
invention will be described below with reference to a third embodiment.
[0060]
Also in the present embodiment, an example of a speaker diaphragm as a papermaking
component will be described with reference to the drawings.
[0061]
FIG. 3 shows a cross-sectional view of the speaker diaphragm in the embodiment of the present
invention.
[0062]
As shown in FIG. 3, reference numeral 27 denotes a speaker diaphragm for a speaker
manufactured by the manufacturing method according to the first embodiment or the second
embodiment.
[0063]
As described in the first embodiment, the speaker diaphragm 27 for mixing the material and the
liquid and the mixed solution obtained in the mixing step apply pressure to the mixed solution
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and then passes through the orifice. This process is realized by the process of refining the
material to be collided with, the process of making a paper containing the finely divided material
obtained by the process of refining, and the process of shape processing of the papermaking part
obtained by the process of papermaking.
[0064]
Therefore, the manufacturing time can be shortened while being a papermaking diaphragm, so
the degree of freedom in adjusting the characteristics and sound quality of the speaker can be
increased, and high productivity can be provided. It can be priced.
[0065]
Here, by setting the mixed solution to a natural product fiber having a concentration of 0.5 wt%
or more, it is possible to realize a natural, bright and good sound quality per ear utilizing the
characteristics of the natural product fiber.
[0066]
When the concentration of the natural fiber is less than 0.5 wt% in the mixed solution, the
characteristics of the natural fiber are not sufficiently exhibited.
[0067]
In addition, by using a composition containing synthetic polymer fibers at a concentration of 0.5
wt% or more, it is possible to realize highly rigid and sharp unique sound quality that makes use
of the characteristics of synthetic polymer fibers.
Furthermore, various reliability represented by water resistance, moisture resistance, etc. can
also be strengthened.
[0068]
When the concentration of the synthetic polymer fiber is less than 0.5 wt% in the mixed solution,
the characteristics of the synthetic polymer fiber are not sufficiently exhibited.
[0069]
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Further, by including 3 to 20 wt% of the finely divided material, it is possible to realize a highrigidity and tough loudspeaker diaphragm in which the entanglement of fibers is strengthened
utilizing the features of the finely divided material, and the high frequency limit It is possible to
extend the frequency and improve the reliability.
[0070]
In addition, when the concentration of the finely divided material fiber is less than 3 wt%, the
effect is not sufficiently exhibited, and when it exceeds 20 wt%, the cost becomes higher
compared to the expression of the effect.
[0071]
Furthermore, by using bamboo fiber as the refining material, it is possible to realize a still more
rigid and strong diaphragm, and it is possible to extend the high frequency limit frequency and
improve the reliability, and to use softwood. By using a faster-growing bamboo, it is possible to
realize a diaphragm friendly to the global environment.
[0072]
Although the speaker diaphragm 27 of the paper making components has been described above,
the present invention can be applied to the speaker sub cone 30 shown in FIG. 4 and the speaker
dust cap 31 shown in FIG. Can be realized.
[0073]
Fourth Embodiment The fourth embodiment of the present invention will be described in the
following.
[0074]
FIG. 6 shows a cross-sectional view of a loudspeaker according to an embodiment of the present
invention.
[0075]
As shown in FIG. 6, the magnetized magnet 21 is sandwiched between the upper plate 22 and the
yoke 23 to form a magnetic circuit 24 of the inner magnetic wall.
[0076]
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12
The frame 26 is coupled to the yoke 23 of the magnetic circuit 24.
The outer periphery of a diaphragm 27 according to a seventh aspect of the present invention is
adhered to the peripheral portion of the frame 26 through an edge 29.
Then, one end of the voice coil 28 is coupled to the central portion of the diaphragm 27, and the
other end is coupled to be fitted into the magnetic gap 25 of the magnetic circuit 24.
[0077]
The sub-cone 30 according to the seventh aspect is coupled to the front of the central portion of
the diaphragm 27.
The sub-cone 30 may also be the dust cap according to the seventh aspect of the present
invention.
[0078]
The above has described the speaker having the internal magnet type magnetic circuit 24.
However, the present invention is not limited to this, and may be applied to a speaker having the
external magnet type magnetic circuit.
[0079]
Furthermore, it is possible to apply also to a small speaker in which the diaphragm 27 and the
edge 29 are integrated.
[0080]
With this configuration, it is possible to inexpensively realize an excellent speaker having good
sound quality using a papermaking diaphragm and capable of adjusting characteristics and
timbre with high accuracy.
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[0081]
As another effect, the rigidity and toughness of the diaphragm can be improved, and a speaker
excellent in quality and reliability can be obtained.
[0082]
Therefore, it is possible to improve the high input resistance of the speaker and various types of
reliability represented by moisture resistance reliability which is important as a car speaker, and
provide the speaker excellent in performance, quality and reliability at low cost. be able to.
[0083]
The method for manufacturing a speaker diaphragm according to the present invention can be
applied to a method for manufacturing a speaker papermaking component that can achieve both
high productivity and low cost that can shorten the manufacturing time.
[0084]
Process chart showing a method of manufacturing a speaker diaphragm according to an
embodiment of the present invention Process chart showing a method of manufacturing a
speaker diaphragm according to an embodiment of the present invention A speaker diaphragm
according to an embodiment of the present invention Cross-sectional view of speaker sub-cone in
one embodiment of the present invention Cross-sectional view of speaker dust cap in one
embodiment of the present invention cross-sectional view of speaker in one embodiment of the
present invention For a conventional speaker Process chart showing manufacturing method of
papermaking diaphragm
Explanation of sign
[0085]
21 magnet 22 upper plate 23 yoke 24 magnetic circuit 25 magnetic gap 26 frame 27 diaphragm
28 voice coil 29 edge 30 subcone 31 dust cap
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