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JPH09134168

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH09134168
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
player device that faithfully reproduces an original sound by utilizing a stringed instrument of
the violin genus.
[0002]
A voice coil is wound around one end of a bobbin on which a cone-shaped diaphragm is attached
as a device for converting an audio current into mechanical vibration to obtain an acoustic
output, and combining this voice coil with a magnetic circuit. Speakers are conventionally known.
In such a speaker, if the center of gravity of the diaphragm and the drive center of the voice coil
are not matched, the diaphragm does not vibrate properly, and the original sound can not be
reproduced faithfully. Therefore, for example, Japanese Patent Publication No. 57-56279
discloses that the amount of air entering from both sides of the central partition of the voice coil
cylinder is controlled to adjust the position of the diaphragm or the voice coil arbitrarily.
[0003]
By the way, since such conventional speakers reproduce sound through diaphragms such as cone
paper, the fidelity to the original sound is insufficient, and even if they are high-class speakers,
they directly listen to live performances. There was a complaint that such a sense of reality could
not be obtained.
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[0004]
Therefore, in view of the above problems, it is an object of the present invention to provide a
player device capable of obtaining a sense of presence directly listening to a live performance
with a simple configuration.
[0005]
The present invention is characterized in that the resonance mechanism of a so-called violin
genus string instrument such as a violin, viola, cello and contrabass is used as an alternative to
the diaphragm of a conventional speaker. There is.
[0006]
That is, in the player apparatus according to the first aspect of the present invention, the drive
coil for converting the audio current into mechanical vibration, the rod-like member having the
base end connected to the vibrating portion of the drive coil, and the piece at the tip of the rodlike member It is comprised by the stringed instrument of the violin genus connected.
[0007]
According to the above configuration, since the mechanical vibration from the drive coil is
transmitted from the rod member to the piece supporting the string of the stringed instrument
such as a violin, the sound from the stringed instrument's torso portion is felt as if the stringed
instrument is actually playing. Is played.
[0008]
Further, in the player apparatus according to the second aspect of the present invention, in
addition to the configuration according to the first aspect, the rod-like member is constituted by
connecting a metal bar body to a fennum buko wood.
[0009]
Here, fernambuco wood is a natural wood widely known to those skilled in the art as a raw
material of a supporting member of a bow used when rubbing strings of a stringed instrument.
Since it is said that the Fernumbuko wood can produce the best sound when it is made to sound
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2
by rubbing a string with a bow, when a part of the bar-like member is made of this Fernumubco
wood, it is a metal bar Here, the unwanted resonance component of can be effectively absorbed
here, and a beautiful, clear and clean sound like that of a brush stroked with a bow is reproduced
from the body of the stringed instrument .
[0010]
Embodiments of the present invention will be described below with reference to the attached
drawings.
First, the entire configuration of the apparatus will be described based on FIGS. 1 to 3. 1 is a
base, 2 is a casing provided on one side of a table, and these are all configured by combining
wooden plate materials.
Inside the casing 2, a magnetic circuit 7 provided with an annular magnet 6 between a bottom
plate 4 provided with a center pole 3 at the center and a top plate 5 is supported by a metal
frame 8.
A voice coil 9 is provided in the magnetic gap 10 of the magnetic circuit 7 so as to be freely
oscillated. The voice coil 9 and the magnetic circuit 7 constitute a drive coil 11 for converting an
audio current into mechanical vibration.
A cylindrical cap 12 which is a vibrating portion of the drive coil 11 for transmitting vibration of
other members is mounted on the tip end side of the voice coil 9.
In the present embodiment, the diameter of the cap 12 is 53 mm. Reference numeral 13 denotes
a damper which supports the voice coil 9 at a position where it is loosely inserted in the center
pole 3 and restricts the lateral vibration of the voice coil 9. The drive coil 11 in the present
embodiment utilizes the one in a state where the diaphragm is removed from the existing coneshaped speaker as it is.
[0011]
21
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Is a rod which is a rod-like member provided to extend outward from the center of the cap 12 to
the casing 2. Each member of the rod 21 is made of an aluminum alloy, and is connected to the
first rod 22 whose proximal end is attached to the center of the cap 12 and the tip of the first rod
22 through a screw 23. A second bar 24 and a bonding body 26 connected to the tip of the
second bar 24 via a screw 25 are provided. The bonding member 26 is a flat first holding
member 27 attached to the second bar 24 by a screw 25 and a second holding member
detachably provided to the first holding member 27 by a screw 28. It has 29 and. A non-slip
member 30 such as sandpaper is attached to one side surface where the first and second
pressing members 27 and 29 face each other. The anti-slip member 30 has an action of reliably
contacting the anchor body 26 with the piece 45 described later, and thereby it is possible to
faithfully transmit the mechanical vibration transmitted to the rod 21 to the piece 45.
[0012]
On the other hand, 40 is a U-shaped elastic piece for holding the side plate 41 of the stringed
instrument of the violin genus. In this embodiment, the violin 42 is mounted on the elastic piece
41 with the spiral 43 at the top. The structure of the violin 42 is the same as that of the one
generally played, and as is well known, the plural strings 44 are supported by the wooden pieces
45, and the pieces 45 are mounted on the upper surface of the body 49 which is a resonance
mechanism. A front plate 46, a back plate 47 provided apart from the front plate 46, and a soul
post 48 for transmitting the vibration transmitted from the piece 45 to the back plate 47 are
provided.
[0013]
The elastic piece 41 is attached and fixed to a table 51 provided movably on the flat surface on
the base 1. Further, the casing 2 can be moved in the height direction by a pivotable bolt 52.
Therefore, even if the shape of the violin 42 is slightly different, by operating the table 51 and
the bolt 52, the tip of the rod 21 can be reliably connected to the piece 45 of the violin 42.
[0014]
The first bar 22 in the present embodiment is 7 mm in diameter, and the second bar 24 is 5 mm
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in diameter. Moreover, in order to reproduce a faithful sound from the body 49 of the violin 42,
when the rod 21 is formed of a single aluminum alloy material, the base of the first bar 22 of the
welding body 26 and the piece 45 It is preferable to set the shortest length to the contact portion
to 145 mm. This applies to the case where a violin 42 is used as a stringed instrument of the
genus of violins.
[0015]
Next, the electrical configuration of this embodiment will be described based on FIG. 51,52Is an
L-channel and R-channel output terminal of the stereo amplifier 53, 54 is a pair of changeover
switches, and by operating the changeover switch 54, the audio current from each output
terminal 51, 52 can be Or, it is supplied to one of the casings 2. Reference numeral 57 denotes a
dummy resistor having the same resistance value of 8 ohms as the stereo speakers 55 and 56.
According to FIG. 4, when the changeover switch 54 is moved to one side (the normal close
terminal 54 a side), the output terminal 51 is connected to the casing 2, while the output
terminal 52 is connected to the dummy resistor 57. When moved to the other side (normally
open terminal 54b side), the output terminal 51 and the stereo speaker 55, and the output
terminal 52 and the stereo speaker 56 are connected respectively.
[0016]
Inside the casing 2, a main switch 61, a coil portion 62 a of the relay 62, and a neon lamp 63 as
a display are connected to both ends of the power plug 64. Further, when the main switch 61 is
turned on, the external terminal 65 is such that the contact 62b of the relay 62 for supplying the
audio current from the output terminal 51 to the drive coil 11 is connected to the normally
closed terminal 54a of the one changeover switch 54. And the drive coil 11. Therefore, in the
present configuration, when the main switch 61 is pressed with the changeover switch 54
switched to one side, the audio current from the R channel of the stereo amplifier 53 is supplied
to the drive coil 11 in the casing 2. ing.
[0017]
Next, the operation of the above configuration will be described. In the state where the
changeover switch 54 is switched to the other side, the audio current from the stereo amplifier
53 is supplied as it is to the stereo speakers 55 and 56 via the changeover switch 54 and each
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stereo Sound is reproduced from the speakers 55 and 56. This is the same as the generally
known existing stereo device.
[0018]
On the other hand, when the switch 54 is switched to one side, the power plug 64 is
appropriately inserted into the outlet and the main switch 61 is pressed, the contact 62b of the
relay 62 is switched and the audio current of the R channel of the stereo amplifier 53 is
switched. Are supplied to the drive coil 11. When the drive coil 11 converts the voice current
into mechanical vibration, the mechanical vibration is transmitted from the rod 21 to the piece of
the violin 42 as it is, the body 49 of the violin 42 vibrates, and a sound is generated therefrom.
[0019]
This embodiment is characterized in that not only the violin 42 but also the resonance
mechanism of a so-called violin belonging to a violin such as viola, cello and contrabass is used as
a substitute for the diaphragm of a conventional speaker. These stringed instruments vibrate the
strings 44 by friction with the bow of horse hair, which is originally coated with pine yani, and
transmit the vibrations from the pieces 45 to the face plate 46, and the soul pole 48 to the face
plate 46 slightly The sound unique to a stringed instrument such as a so-called violin 42 is
mainly generated from a pair of f holes formed in the front plate 46 by transmitting it to the back
plate 47 having different natural frequencies (fundamental frequencies). At this time, the piece
45 plays an important role in converting the lateral vibration transmitted from the string 44 into
the perpendicular direction. Therefore, if mechanical vibration of the same frequency as that
when the string 44 is rubbed against the piece 45 is applied from the outside, these stringed
musical instruments actually repel such a comparison as compared with conventional high-class
speakers. The inventor of the present invention realized that the sound could be reproduced as
close as possible.
[0020]
Specifically, a drive coil 11 for converting an audio current into mechanical vibration, a rod 21
having a base end connected to the cap 12 of the drive coil 11, and a violin 42 having a piece 45
connected to the tip of the rod 21 The mechanical vibration from the drive coil 11 is transmitted
from the rod 21 to the piece 45 supporting the string 44 of the violin 42, so that the body 49 of
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the violin 42 is as if the violin 42 is actually playing. The sound can be faithfully reproduced
from the part. That is, with a simple configuration in which the drive coil 21 and the piece 45 of
the violin 42 are connected by the rod 45, it is possible to obtain a sense of realism that directly
listens to live performances.
[0021]
Referring to the violin 42, the musical sound of the violin 42 has a fundamental frequency of a
specific range and a frequency component of an integral multiple of the fundamental frequency.
Therefore, it is preferable that the frequency component of the audio current be as close as
possible to the frequency component of the musical instrument sound possessed by the violin 42.
In particular, when the performance sound of a violin (without accompaniment) recorded on a
cassette tape or a compact disc is supplied as it is to the drive coil 11 as a sound current, a sound
produced by the violin 42 itself is generated from the body 49. This is because the frequency
component of the recorded performance sound of the violin almost matches the frequency
component of the violin 42. In addition to violins, strings of violins such as viola, cello and
contrabass, stringed instruments such as guitars and mandolins, or harpsicholl can also
reproduce sounds relatively close to the original sound. Furthermore, it was confirmed that violin
and piano sonatas can also reproduce sounds close to the original sound. In this example, when a
cello was attached instead of the violin 42, it was confirmed that the sound of the piano alone
can be relatively well reproduced from the difference in the frequency components of the
musical instrument sound of the cello and the violin 42.
[0022]
By the way, in order to reproduce a faithful sound from the body 49 of the violin 42, it is
necessary to select the material of the rod 21 or the like so that the mechanical vibration from
the cap 12 of the drive coil 11 can be transmitted faithfully to the piece 45. That is, it is
necessary to consider the relationship among the elasticity, damping (internal friction), density,
transmission speed, natural frequency and the like of the rod 21.
[0023]
For example, considering the case where a violin 42 is used as a stringed instrument, the front
plate 46 made of pine and the back plate 47 made of rattan have different lowest natural
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frequencies, and the front plate 46 is C #. It is common among producers of violins 42 that if the
back plate 47 can be adjusted with the scale in the range of ~ D and the back plate 47 can be
adjusted in the scale in the range of D ~ D, then the violin 42 can be produced that produces
excellent sound. Common sense. C. announced in the Japanese board "Science" in 1981. M.
According to Mr. Hutchins's “violin acoustics”, the lowest natural frequency of the front plate
46 is 139 to 148 Hz (C # 3 to D3 in the scale), and the lowest natural frequency of the back plate
47 is 148 to 156 Hz (D3 to 3 in the scale) It discloses that it is D # 3). From this result, it is
preferable that the lowest natural frequency of the rod 21 does not coincide with at least the
frequency of 139 to 156 Hz which is the range of the lowest natural frequency of the top plate
46 and the back plate 47 and an integral multiple thereof. . In this embodiment, the shortest
length from the base end of the first bar 22 to the contact portion between the bonding body 26
and the piece 45 is set to 145 mm, and the entire material of the rod 21 is formed of aluminum
alloy. The most faithful sound could be reproduced from the body 49 of the violin 42.
[0024]
Further, when the violin 42 is actually played, since the vibration in the lateral direction is given
to the piece 45, the rod 21 which is also movable in the lateral direction along the axis is
connected to the piece 45 in the same manner. Preferably, a damper 9 is attached to the cap 12
or the rod 21 which restricts the movement of the rod 21 in the longitudinal direction, ie
perpendicular to the axis of the rod 21. Thereby, it is possible to suppress vibration from an
unnecessary direction with respect to the top 45.
[0025]
Furthermore, the portion of the drive coil 11 of the present embodiment actually uses the
existing speaker with the diaphragm removed, and no special structure is required. Therefore,
there is no design difficulty in manufacturing the device. Since the quality of the final sound also
changes by replacing the violin 42, the present apparatus can be effectively used when
examining the sound quality of the violin 42. Of course, the drive coil 11 does not need to use
especially what was integrated in the speaker.
[0026]
Next, a second embodiment of the present invention will be described based on FIG. The same
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parts as those in the first embodiment are designated by the same reference numerals, and the
detailed description of the common parts will be omitted to avoid duplication.
[0027]
The present embodiment is an improvement of the rod 21 in the first embodiment. That is, the
rod 21 which is a rod-like member has a diameter of 6 mm and connects the base end of the
aluminum alloy rod 71 to the central portion of the cap 12 of the drive coil 11 and Further, the
same welded body 26 as in the first embodiment is connected and fixed to the tip end side of the
fernambuco wood 72 with a screw 25. In addition, the shortest length from the base end of the
rod 71 to the contact portion between the bonding body 26 and the piece 45 is 145 mm. The
other configuration is completely the same as that of the first embodiment.
[0028]
Here, fernambuco wood 72 is a natural Brazilian wood widely known to those skilled in the art as
a raw material of a supporting member of a bow used when rubbing strings of a stringed
instrument. By forming part of the rod 21 with foreign wood, the resonance component of the
undesirable natural frequency possessed by the metal rod 71 can be effectively absorbed here.
Moreover, since it is said that the fennum buko wood 72 can produce the most excellent sound
when it is made to sound by rubbing the strings with a bow, the felnum buko wood is used in the
portion of the rod 21 which transmits the mechanical vibration to the piece 45. With the wood
72, a beautiful, clear and clean sound like that of rubbing the strings with the bow attached to
the fennum buko wood 72 can be faithfully reproduced from the body 49 of the violin 42.
Furthermore, since the fennum bouco wood 72 is used not only for the violin 42 but also as a
supporting member for the bows of string instruments of other violins, similar effects can be
obtained even when using a string instrument other than the violin 42. There is an advantage.
[0029]
That is, connecting the fernambuco wood 72 to the metal bar 71 to construct the rod 21 can
effectively absorb the undesirable resonance component of the bar 71, and the bow is attached
to the fernambuco wood 72. You can faithfully reproduce a beautiful, clear and unmixing sound,
like when you rub the strings at.
[0030]
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The present invention is not limited to the above embodiments, and various modifications can be
made within the scope of the present invention.
For example, the shape of the rod 21, which is a rod-like member, is desirably changed in
consideration of the characteristics of the applied stringed instrument.
[0031]
According to the first aspect of the present invention, the player apparatus comprises a drive coil
for converting an audio current into mechanical vibration, a rod-like member having a base end
connected to a vibrating portion of the drive coil, and a tip of the rod-like member. It is composed
of a stringed musical instrument of the genus of violins in which pieces are connected to each
other, and it is possible to obtain a realistic feeling as if listening directly to live performances
with a simple configuration.
[0032]
Further, in the player apparatus according to the second aspect of the present invention, in
addition to the configuration according to the first aspect, the bar-like member is connected to a
metal bar body to form the rod-like member. It can effectively absorb the body's unwanted
resonances, and it can faithfully reproduce a beautiful, clear and jumbled sound as if you rub the
strings with the bow attached to the fernambuco wood.
[0033]
Brief description of the drawings
[0034]
1 is a partially cutaway front view of a player device showing an embodiment of the present
invention.
[0035]
2 is a sectional view taken along the line A-A of FIG.
[0036]
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3 is a perspective view of the main part of the same.
[0037]
4 is a circuit diagram showing the electrical configuration of the same.
[0038]
5 is a plan view of the main part showing a second embodiment of the present invention.
[0039]
Explanation of sign
[0040]
11 Drive coil 12 Cap (vibrator) 21 Rod (bar-like member) 41 Violin (stringed musical instrument
of violin genus) 45 piece 71 bar body 72 fernambuco wood
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