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JP2008104062

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DESCRIPTION JP2008104062
An object of the present invention is to provide an acoustic device excellent in vibration-proofing
property that exhibits effective prevention characteristics by means of simple and low cost.
SOLUTION: A coating film made of an anti-vibration coating composition in which a resin solid
content obtained by boiling down a balsam which is a sap collected from a pine tree to a specific
range is dissolved in a solvent is at least an acoustic device. An acoustic device having antivibration properties, characterized in that it is formed in part. 【Selection chart】 None
Vibration-resistant sound equipment
[0001]
The present invention relates to a vibration control technology for acoustic devices, and more
particularly to a sound device having a coating film excellent in vibration control or vibration
control effect.
[0002]
In the present invention, the term "audio equipment" is meant to encompass not only audio
equipment in a narrow sense but also so-called AV equipment such as video equipment, and
processes audio and video signals including digital and analog, Broadly includes equipment for
transmission, input and output.
[0003]
Heretofore, when playing back music by an audio device, it is known that micro vibrations
generated from audio devices including the wiring cable and the like affect the reproduced sound
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quality.
[0004]
For example, audio cables used for electrical connection of audio equipment are required to have
higher transmission characteristics in order to provide high sound quality.
However, in audio cables, it is known that fine vibrations occur due to electrical factors such as
AC signals, and the fine vibrations generated inside the cable cause voltage fluctuations,
vibrations of the conductor itself, and resonance phenomena. It is thought that these factors
cause the sound quality and the image quality to be adversely affected.
[0005]
Conventionally, in order to suppress or prevent the vibration generated inside such an audio
cable, for example, an anti-vibration layer is provided between the conductor and the insulating
covering layer, and the anti-vibration layer has a relatively high specific gravity such as tungsten.
By filling the metal powder, the vibration of the conductor generated during the electrical signal
transmission and the vibration transmitted from the outside due to the conversion from the
vibration energy to friction heat energy due to the mass increase of the entire cable and the
friction between the powder Has been proposed to prevent the transmission deterioration of the
electric signal by this.
JP 2004-296283 A
[0006]
An object of the present invention is to provide an acoustic device excellent in vibration-proofing
property that exhibits effective prevention characteristics by means of simplification and cost
reduction.
[0007]
In order to solve the above-described problems, the acoustic device having vibration damping
properties according to the present invention uses resin solid content obtained by simmering
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balsam which is a sap collected from a pine tree to a specific range as a solvent It is characterized
in that a coating film made of the dissolved anti-vibration coating composition is formed on at
least a part of the acoustic device.
[0008]
In a preferred embodiment of the present invention, the balsam comprises a venetian turpentine,
and is obtained by boiling down the balsam-derived resin solid content to an amount range of 10
to 25% by volume. Is desirable.
[0009]
In a preferred embodiment of the present invention, the solvent is a vegetable solvent, preferably
turpentine oil.
[0010]
Furthermore, in a preferred embodiment of the present invention, the above-mentioned audio
equipment comprises equipment and electronic parts used for input / output system and
transmission of audio signals and / or image signals, processing and processing of audio and
image information. It is a thing.
[0011]
Furthermore, in the present invention, the above-mentioned audio equipment can be an audio
cable, a speaker box, a speaker cone, a speaker horn, an amplifier device, a player, or an
insulator.
[0012]
The present invention also relates to an anti-vibration coating composition in which a resin solid
content obtained by simmering balsam, which is a sap collected from a pine tree, to a specific
range is dissolved in a solvent in a predetermined part of an acoustic device. And forming a
coating film as described in the following.
[0013]
In the acoustic device according to the present invention, a paint composition comprising, in a
solvent, a resin solid component obtained by simmering balsam which is a sap collected from a
pine tree to a specific range in a solvent. According to the present invention, a film is formed, and
the coating film is excellent in the vibration proofing property. Thus, according to the present
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invention, an acoustic device excellent in the vibration proofing property is provided by means of
achieving simple and low cost. can do.
[0014]
An acoustic device having vibration damping properties according to the present invention
comprises a vibration resistant paint composition in which a resin solid content obtained by
boiling down a balsam, which is a sap collected from a pine tree, to a specific range is dissolved
in a solvent. The coating film is formed on at least a part of the acoustic device.
[0015]
Hereinafter, the present invention will be specifically described based on its preferred
embodiments.
[0016]
Raw material balsam Balsam as a raw material is a sap collected from a pine tree and is a
composition comprising a mixture of a resin component and an essential oil, and preferably used
are venetian terepin, Canadian balsam, Strasburg Telepin etc. are mentioned.
[0017]
Among the above, Venetian turpentine (Trementian veneta), which is an oleoresin obtained by
collecting the secretion from the heart of the European pine tree, is most preferably used.
This venetian turpentine is a balsam mainly produced in the Tyrol region, which is highly viscous
and has a characteristic rosin odor.
Typical components consist of about 63% resin acid, about 20% terpene, and about 14% resin.
[0018]
Preparation of resin solid content Resin solid content is obtained by heating and simmering the
above-mentioned balsam to a specific range of volume ratio.
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Balsam as a raw material is a relatively high viscosity sap, which is gradually heated by a heating
means such as an electric heater.
[0019]
Although heating temperature may be suitably selected according to the kind of balsam, it is
preferable to heat at the temperature of 200 degreeC-250 degreeC, for example, in the case of a
venetian turpentine.
[0020]
It is important to boil gently for several hours to several tens of hours, and it is usually preferable
to simmer until the volume is about 25% to 10% over about 15 to 20 hours.
The resin component obtained by boiling down solidifies at normal temperature after stopping
heating.
Thus, depending on the ratio of boiling balsam, differences in softness and color of the obtained
resin solid content are observed.
[0021]
For example, in the case of the Venetian turpentine, at the 25% volume ratio after boiling down,
the color is slightly lighter and more amber than red.
As it is further boiled down, the color gradually becomes reddish and becomes about 20% the
most bright red.
It is observed that the color gradually turns to brown when boiling down to 20% or less.
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When it is boiled down to 10%, it becomes dark brown with almost no redness.
Also, the higher the rate of boiling, the more brittle the resin solid obtained is.
[0022]
Preparation of coating composition (varnish) As described above, the resin component is
solidified at normal temperature by stopping heating of the raw material balsam and cooling.
When using solid resin solids which are solid at normal temperature as varnishes, it is necessary
to dissolve the obtained resin solids in a solvent.
[0023]
As the solvent, plant solvents may be used, and among the plant solvents, particularly, turpentine
oil is particularly preferable.
[0024]
When turpentine oil is used as a solvent, the resin solid content does not dissolve in turpentine
oil at normal temperature, so it is necessary to dissolve the resin solid content in turpentine oil
heated to a temperature of about 150 ° C. .
In this case, the ratio of resin solid content to turpentine oil is preferably about 1: 1 to about 4,
and most preferably in the range of 1: 1.5 to 2.5.
In addition, about the quantity of the solvent at the time of preparation of a varnish, it can adjust
also at the time of the coating to an object apparatus.
[0025]
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Application to Acoustic Equipment In the present invention, by suitably applying the vibrationproof coating composition obtained as described above to a predetermined portion of the
acoustic equipment, an acoustic equipment having excellent vibration-proof characteristics and
can do.
Applicable audio equipment includes sound and image quality associated with vibration of input
/ output systems and transmission of audio signals and / or image signals, transmission of audio
/ video information, and devices or electronic parts used for processing audio / image
information. The present invention can be widely applied to devices whose deterioration may be
a problem.
[0026]
In particular, the present invention is effective for audio equipment such as an audio cable, a
speaker box, a speaker cone, a speaker horn, an amplifier device, a player, or an insulator.
[0027]
The following can be applied as specific application examples of the present invention.
(1) A cable in which the paint is applied to the surface of a conductor, an insulation coating, a
connection plug or the like to damp or damp the natural vibration in the cable generated by the
electric signal.
(2) Anti-vibration by directly applying the minute vibration of the casing of the audio device and
the electronic device etc., electronic components, wiring material, printed circuit board, etc.
which are caused by current passage, driving of the motor or external propagation. Equipment
with vibration damping properties. (3) The anti-vibration paint is applied to an installation table
(insulator) for anti-vibration and vibration control of micro-vibration of equipment etc. to further
improve the anti-vibration property. (4) Applying vibration-proof paint to the unit vibration part
(corn paper, voice coil, edge, damper), unit housing (frame, magnet housing) and installation box
(enclosure) Speaker system with improved vibration and vibration control characteristics.
[0028]
The reason why the excellent anti-vibration property is exhibited by the application of the above-
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mentioned anti-vibration paint composition is not necessarily clear, but can be estimated as
follows.
[0029]
Generally, when current (electrons) flows in a conductor such as an audio cable, atoms or
molecules constituting the conductor vibrate.
It is conceivable that this vibration generates heat in the conductor, and this phenomenon causes
a voltage drop. Here, in the case of an alternating current electrical signal, in particular, a current
flows in the vicinity of the surface of the conductor due to the skin effect, so it is considered that
many vibrations occur in the vicinity of the surface of the conductor. In addition, when an electric
(AC) signal flows through the conductor, the conductor receives a force (Fleming's law) by the
influence of the magnetic field generated from the magnetic attraction and the electronic device
existing on the earth, and the conductor vibrates by this force. It is thought that
[0030]
Furthermore, the insulating material such as PVC that is in contact with the metal forming the
conductor and the conductor has an inherent resonance point due to the density and hardness of
the respective materials, and vibration due to the frequency included in the AC signal (audio
signal) It is considered that (amplitude) increases and decreases.
[0031]
As a result of vibration (resonance) in the cable due to various factors as described above, the
distance between the conductors in the cable (the distance between the hot and cold signal lines
of the signal wire) changes, and the capacitance (capacity) increases or decreases. The frequency
characteristic (impedance = inductance / capacity) is fluctuated by this, and it is presumed that
this will adversely affect the reproduced sound quality.
[0032]
The above-mentioned capacitance can be expressed by the following equation in the example of
the coaxial cable.
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C = capacitance (pF / m) = (55.6 * ε) / log (D / d) (where, ε = dielectric constant, D = inner
diameter of outer conductor (m), d = outer diameter of inner conductor (m) Further, the
characteristic impedance can be expressed by the following equation.
ZO = characteristic impedance (Ω) = (60 / sqrt (ε)) * log (D / d) (where, ε = dielectric constant,
D = inner diameter of outer conductor (m), d = outer diameter of inner conductor (m) )
[0034]
In fact, when a cable is prepared using hard and soft, heavy and light, large and thin conductors,
and with and without the application of the paint of the present invention manufactured and
auditioned by connecting to an audio device, this remarkable change in sound quality You can
feel the
[0035]
The reason why the anti-vibration coating composition according to the present invention
contributes to the improvement of sound quality is not always clear, and the present invention is
not restricted by any theory, but can be considered as follows.
[0036]
The rosin, which is the main component of the anti-vibration coating composition according to
the present invention, has a very high electrical resistance value and a low dielectric constant.
Furthermore, it is considered that this coating composition has the property of being able to
damp and damp (convert the vibration into heat) without causing a peak in the frequency
vibration of the audible band also from the effect applied to a stringed instrument or the like.
Therefore, by applying the paint composition to the conductor surface of an audio cable, an
audio device, or a mounting stand, the generation of micro-vibrations generated by these
acoustic devices is absorbed or suppressed, and the vibration and vibration suppressing
performance is improved. It is estimated that the transmission performance (sound quality)
improvement of AC electric (voice) signal etc. is expressed by this.
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[0037]
Preparation Example of Anti-Vibration Coating Composition Venetian turpin (A.C.E.E.E.E.F.s.p.a. A
company-made "Trementina Veneta Filtrata" was prepared. Acidity: 65 to 100 Saponification
degree: 90 to 190 Flash point: 45 to 55 ° C. NESTERI: 20 to 35 Density (20 ° C.): 1. 004
[0038]
The Venetian turpentine was heated using an electric heater at a temperature of 200 ° C. to 250
° C. and boiled down to about 25% to 10% in volume for about 15 to 20 hours. The resin
component is solidified at normal temperature, and the softness and color of the resin are
different depending on the ratio of boiling. By this method, it was possible to obtain 250 to 100
cc of resin solid content from 1000 cc of Venetian terpene. Three resin solids of about 25%,
about 20% and about 10% were obtained.
[0039]
That is, at the 25% level, the color is somewhat lighter and more amber than red. As it is further
boiled down, the color gradually becomes reddish and becomes about 20% the most bright red. It
is observed that the color gradually turns to brown when boiling down to 20% or less. When it is
boiled down to 10%, it becomes dark brown with almost no redness. Also, the higher the rate of
boiling, the more brittle the resin solid obtained is.
[0040]
When heating is stopped, the resin component solidifies at normal temperature. In order to use
the resin solid at ambient temperature as a varnish, it was dissolved in turpentine oil (solvent).
Since the resin does not dissolve in turpentine oil at normal temperature, the resin solids
obtained were dissolved in turpentine oil heated to a temperature of about 150 ° C. In this case,
the ratio of resin solids to turpentine oil is about 1: 1.5-2.5. The amount of turpentine oil in the
preparation of the above-mentioned varnish can be adjusted also at the time of coating.
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[0041]
The horizontal plate materials (40 × 200 mm, agate) were each coated using three types of
varnishes prepared from the obtained three types of resin solids of about 25%, about 20% and
about 10%. It was confirmed that while the color intensity increases in the order of 25% to 10%
of the boiling ratio shifting, a very soft coating having a bright red color is formed in any of the
varnishes. It looks brown under normal light, but it looks bright red when viewed under intense
lighting. It is considered that this is because the refractive index of the obtained coating film is
high and the light transmittance is excellent.
[0042]
Example of Application to Audio Device Next, a specific example of application to audio device
will be described.
[0043]
The varnish obtained above was coated on the surface of the following audio cable (3 types)
conductor (copper single wire).
(1) RCA audio cable: Cable connecting between CD player and amplifier (2) Balanced cable: Cable
used between preamplifier and power amplifier (3) BNC digital cable: Cable used between CD
player and DA converter
[0044]
The pre-painted cable and the painted cable were compared and auditioned. The sound of each
case was evaluated using CDs such as violin, piano and orchestra.
[0045]
Evaluation In any of the above three types of cables, a significant and significant improvement
effect was observed when the cable conductor surface was coated with a varnish. In particular, it
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is recognized that the violin, the piano and the orchestra are closer to the actual raw sound than
the case where the film of the varnish is not formed, and the presence feeling is significantly
improved. In addition, it has been confirmed that the dynamic range from pp to ff is increased
and the frequency characteristic is also expanded. Also, the bass range is clear and louder, and is
played back to lower frequencies. Furthermore, the ff of the bass part of the piano is a very fresh
impression, and even with the small speaker, the bass is substantial, so that a near satisfaction
can be obtained when using the large speaker.
[0046]
On the other hand, the treble range is natural without subtleness and hardness, and the offensive
sensation disappears. In particular, in the reproduction of a violin, a sense of realism, such as
listening to live authentic instruments (Stradivari, etc.) in particular, is recognized. The midrange
is plump, clear and rich in timbre, and it is recognized that the difference in timbre of stringed
instruments, woodwind instruments and brass instruments is clearly reproduced in orchestra
reproduction.
[0047]
In addition to the above, when applied to a substrate of a CD player, a power cord, an outlet box,
a speaker box and the like, the same improvement in sound quality was recognized.
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