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JP2016045316

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DESCRIPTION JP2016045316
Abstract: PROBLEM TO BE SOLVED: To generate rich sound by a vibrator using a resonance
cylinder of a general stringed instrument. A guitar (100) has a neck (16) and a resonance drum
(10), and the resonance drum (10) comprises a top plate (11), a back plate (12) and a side plate
(13). The stand 20 has a U-shape or a U-shape in a side view, and each of the forearms 21 is
provided with a transducer TrF for vibrating the front plate 11. The rear arm 22 is provided with
a transducer TrB for vibrating the back plate 12. The transducers TrF and TrB are inserted by
inserting the resonance drum 10 into the U-shaped portion of the stand 20 and bringing the
supported portion 19 into contact with the bottom 23 and tilting the resonance drum 10 toward
the side (rear) where the transducer TrB is located. It abuts on the front plate 11 and the back
plate 12 respectively. When an acoustic signal is supplied to the transducer Tr as a drive signal,
it vibrates, and the front plate 11 and the back plate 12 are excited to generate a rich sound.
[Selected figure] Figure 1
Support for stringed instruments, Excitation device for stringed instruments
[0001]
The present invention relates to a support for a stringed instrument having a resonance cylinder,
and an excitation apparatus for the stringed instrument.
[0002]
Conventionally, a stringed instrument having a resonating body, such as an acoustic guitar, a
bass, a violin, a ukulele, and a mandolin, is known.
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1
For example, a resonance cylinder of a guitar is composed of a front plate, a back plate and a side
plate, and a sound hole is formed on the front plate. The playing of the strings mainly vibrates
the front and back plates, and resonates with the resonance cylinder to generate a rich sound.
[0003]
By the way, with such a stringed instrument, an apparatus is known which generates sound by
using a resonance drum regardless of performance. For example, in patent document 1, a
speaker is attached to the sound hole of a guitar, and the resonance trunk is made to function as
an enclosure of a speaker. There is also known a sound promoting device in which a vibrating
body such as a spring for giving string vibration is provided on a stringed instrument main body
such as a guitar to promote sound promotion (Patent Document 2).
[0004]
Utility Model Registration No. 3188252 JP-A-2006-65276 JP-A-5-227585 JP-A-5-244677
[0005]
However, in Patent Document 1, since it is necessary to attach a speaker to a stringed
instrument, and some processing for it is also required, it can not be widely applied to general
(for example, commercially available) guitars and the like.
Moreover, in patent document 2, although sound promotion is achieved, it is not the structure for
enjoying the sound itself by the vibration by a vibrating body.
[0006]
In addition to the stringed instrument, a speaker is also known in which a vibrating body is
provided in a box having a sound hole and the box is vibrated (Patent Documents 3 and 4).
However, these are also not widely applicable to general stringed instruments.
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2
[0007]
The present invention has been made to solve the above-mentioned problems of the prior art,
and its object is to make it possible to generate rich sound by a vibrator using a resonance
cylinder of a general stringed instrument. It is in.
[0008]
In order to achieve the above object, the support of the stringed instrument according to claim 1
of the present invention is a support (20) of a stringed instrument supporting a stringed
instrument (100) having a resonance cylinder (10) and vibrated by a drive signal. It has an
exciter (Tr), and when the stringed instrument is supported by the support, the exciter abuts on
the resonance cylinder of the stringed instrument to excite the resonance cylinder. It is
characterized by
[0009]
Preferably, when the stringed instrument is supported by the support, the vibrator is disposed on
at least one main vibrating wall (11, 12) that mainly vibrates among the walls constituting the
resonance cylinder of the stringed instrument. It is configured to excite the main vibrating wall in
contact therewith (claim 2).
Preferably, the main vibrating wall includes a first main vibrating wall (11) and a second main
vibrating wall (12) at mutually opposing positions, and the vibrator includes the first main
vibrating wall. There are a first vibrator (TrF) for vibrating the vibrating wall and a second
vibrator (TrB) for vibrating the second main vibrating wall (claim 3).
Preferably, when the stringed instrument is supported by the support, the positions of the first
vibrator and the second vibrator as viewed from a direction substantially perpendicular to the
first main vibrating wall. Are different (claim 4). Preferably, the portion of the vibrator that abuts
on the resonance cylinder is formed into a convex curved surface (claim 5).
[0010]
In order to achieve the above object, the vibrating device for a stringed musical instrument
according to claim 6 of the present invention is provided with a first main vibrating wall (11) and
a second main vibrating wall (12) which face each other and mainly vibrate. An excitation device
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(20, 120) for vibrating the resonance drum of the stringed instrument (100) having the
resonance drum (10), wherein the vibration device is vibrated by a drive signal and is applied to
the first main vibrating wall A first vibrator (TrF) for vibrating the first main vibrating wall in
contact with the second main vibrating wall, which vibrates in response to a drive signal, contacts
the second main vibrating wall, and adds the second main vibrating wall. And a second vibrator
(TrB) for vibrating.
[0011]
In addition, the code in the said parenthesis is an illustration.
[0012]
According to the first aspect of the present invention, it is possible to generate rich sound by the
vibrator using the resonance cylinder of a general stringed instrument.
[0013]
According to the second aspect, it is possible to excite the main vibrating wall to generate a rich
sound.
According to the third aspect, it is possible to simultaneously vibrate the two opposing walls to
efficiently generate rich sound.
According to the fourth aspect, it is possible to excite a suitable point for each main vibrating
wall.
According to the fifth aspect, it is possible to easily secure the contact state, and to cope with
many types of stringed instruments.
[0014]
According to the sixth aspect of the present invention, it is possible to generate rich sound by the
exciter utilizing the two opposing walls of the resonance cylinder of a general stringed
instrument.
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[0015]
They are a side view (figure (a)) of a support concerning a 1st embodiment of the present
invention, a front view (figure (b)), and a side view (figure (c)).
It is a block diagram showing composition of a control part. It is a side view (figure (a), (b)) which
shows the modification of a transducer, and a side view (figure (c), (d)) which shows the
modification of a support body. It is a perspective view (figure (a)) of a supporter concerning a
2nd embodiment, and a perspective view (figure (b), (c)) showing a modification of a stand. They
are a side view (figure (a)) of the support concerning a 3rd embodiment, and a front view (figure
(b)). It is a figure (figure (a), (b), (c)) which shows the modification of a stand. They are a side view
(figure (a)) and a front view (figure (b)) of a stringed musical instrument to which the oscillating
device concerning a 4th embodiment was attached.
[0016]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0017]
1 (a) and 1 (b) are a side view and a front view of a support according to a first embodiment of
the present invention.
The support supports a stringed instrument having a resonance cylinder, and an acoustic guitar
100 is an example of a stringed instrument, and a stand 20 for a guitar is an example of a
support. The stringed instrument supported by the support to which the present invention is
applied may be a stringed instrument having a resonance cylinder, and may be, for example, an
acoustic bass, a violin, a ukulele, a mandolin or the like. The stringed instrument may be an
electric stringed instrument provided with a sensor such as a pickup as long as it is a stringed
instrument having a resonance cylinder, and may be, for example, an electric acoustic guitar, a
bass, a violin, a ukulele, a mandolin or the like.
[0018]
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As shown in FIGS. 1A and 1B, the guitar 100 has a neck 16 and a resonance cylinder 10, and a
string 14 is stretched from the neck 16 to the resonance cylinder 10. The resonance cylinder 10
is composed of a front plate 11, a back plate 12 and a side plate 13. The top plate 11 and the
back plate 12 are opposed substantially in parallel. The side plate 13 is generally a connecting
wall connected to the edge 17 of the front plate 11 and the edge 18 of the back plate 12. A
sound hole 15 is formed in the front plate 11. The top plate 11 and the back plate 12 serve as
main vibrating walls that mainly vibrate.
[0019]
The stand 20 has a control unit 101. The control unit 101 may be separate from the stand 20.
The stand 20 has a bottom 23, two forearms 21 and one rear arm 22, which are U-shaped (or Ushaped) in a side view. Each of the forearms 21 is provided with a transducer TrF for exciting the
front plate 11 so as to be directed inward in a U-shape. The rear arm 22 is provided with a
transducer TrB for exciting the back plate 12 toward the inside of the U shape. The transducers
Tr (TrF, TrB) are vibrators that vibrate using supplied acoustic signals (musical tone signals) as
drive signals, and vibrate (excite) an object to generate sounds. Driving of the transducer Tr is
performed by the control unit 101, the details of which will be described later with reference to
FIG.
[0020]
The basic shape of the stand 20 may be the same as a commercially available one, and it is also
possible to obtain the stand 20 of the present invention by providing the control unit 101 and
the transducer Tr on a stand having a general configuration. The stand 20 supports the
resonance drum 10 of the guitar 100 in a posture in which the neck 16 is directed upward by
the bottom 23, the forearm 21 and the rear arm 22. The bottom 23 is the main support for
receiving the resonance cylinder 10. The lower portion of the resonance cylinder 10 in the
posture in which the neck 16 is upward, specifically, the supported portion 19 supported by the
bottom portion 23 with the side plate 13, the edge 17 of the front plate 11 and the edge 18 of
the back plate 12. It becomes.
[0021]
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When the guitar 20 is supported by the stand 20, the resonance drum 10 is inserted between the
U-shaped part of the stand 20, that is, between the transducer TrF and the transducer TrB, and
the supported portion 19 of the resonance drum 10 is a support portion (bottom Support in 23).
The general guitar 100 is assumed. Therefore, in order to make the stand 20 versatile, the
distance between the transducer TrF and the transducer TrB is the thickness of the resonance
drum of a general guitar (the distance between the outer surface of the front plate 11 and the
outer surface of the back plate 12) It is set larger than.
[0022]
FIG. 1A shows a state immediately after the resonance drum 10 is inserted into the U-shaped
portion of the stand 20 and the supported portion 19 is brought into contact with the bottom
portion 23. On the other hand, FIG. 1C shows a state in which the guitar 100 is normally
supported by the stand 20. In the present embodiment, the properly supported state means that
the supported portion 19 is supported by the bottom portion 23 and the transducer TrF is in
contact with the front plate 11 and the transducer TrB is in contact with the back plate 12. It
means the state of contact.
[0023]
As shown in FIG. 1A, in a state where the supported portion 19 is supported by the bottom
portion 23, when the transducers TrF and TrB are not in contact with the front plate 11 and the
back plate 12, respectively, the position is higher The transducers TrF and TrB abut on the front
plate 11 and the back plate 12, respectively, by tilting the resonance barrel 10 to the side (rear)
on which the transducer TrB is located (FIG. 1 (c)). As long as the transducers TrF and TrB are in
contact with the front plate 11 and the back plate 12, the contact point in contact with the
bottom portion 23 may be anywhere in the supported portion 19. In the example shown in FIG.
1C, the edge 18 of the back plate 12 is the contact point P1.
[0024]
When the guitar 100 is normally supported by the stand 20, the positions of the transducer TrF
and the transducer TrB are different when viewed from a direction substantially perpendicular to
the top plate 11. When the stand 20 is placed on the floor and the transducers TrF and TrB are
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higher than the bottom 23, the transducer TrB is located above the transducer TrF. The
transducer TrB abuts on a position relatively far from the side plate 13 in the back plate 12,
while the transducer TrF abuts on a position near the side plate 13 on the face plate 11 as
compared with the transducer TrB.
[0025]
Thus, the back plate 12 is suitable for generating medium to low range sound, and in order to
enhance the excitation efficiency, the transducer is adapted to excite the position as close as
possible to the center in the surface direction of the back plate 12. TrB is arranged. On the other
hand, the top plate 11 is suitable for generating high-range sound, and the difference in
excitation efficiency depending on the excitation position is small, so the transducer TrF may be
disposed at a position close to the side plate 13. The lower region is emphasized when the central
portion far from the side plate 13 is excited for any of the front plate 11 and the back plate 12,
and the low region is less likely to occur when the peripheral region near the side plate 13 is
excited. There is a tendency that the high region is emphasized. Therefore, the excitation position
may be set in consideration of these points.
[0026]
In addition, although it is desirable to excite the transducer TrF at a position avoiding the sound
hole 15 or at a position avoiding foreign objects such as a bridge or a pick guard, components
fixed to the front plate 11 such as a bridge or a pick guard are added. The top plate 11 may be
vibrated indirectly by shaking. Since the sound and the localization change somewhat depending
on the vibration position by the transducers TrF and TrB, the arrangement of the transducers TrF
and TrB may be set in consideration of them. Although the localization of the low-range sound
generated from the back plate 12 is not clearly recognized, the consideration of the localization
may be particularly useful for the front plate 11 in some cases. When both the top plate 11 and
the back plate 12 are vibrated, the sound is localized between the top plate 11 and the back plate
12 (substantially at the center of the thickness direction of the resonance cylinder 10). It is
possible to obtain a near natural feeling of localization at the time of sound generation by
musical instrument performance.
[0027]
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The tips of the transducers TrF and TrB are formed in a convex curved surface such as a
spherical surface. This is because the angle of the front plate 11 and the back plate 12 in a state
where the guitar 100 is normally supported by the stand 20 can be different depending on the
shape type and size of the guitar 100, and the contact state can be easily secured. This is to be
widely applicable to many types of guitars.
[0028]
FIG. 2 is a block diagram showing the configuration of the control unit 101. As shown in FIG.
[0029]
The CPU 31 receives an input from the operation element 32 via the bus 36 and controls the
various I / F (interface) 34, the distribution unit 33, and the memory 35.
Although not shown, the CPU 31 has a ROM, a RAM, a timer, and the like. The various I / F 34
includes a MIDI interface, an interface for inputting musical tone signals, and the like.
[0030]
In the memory 35, waveform data groups dF and dB are stored in advance. Each of the waveform
data groups dF and dB is a collection of sampling waveform data for one tone generated by
sampling a musical tone waveform of a guitar or the like, and has a volume envelope. The
waveform data groups dF and dB are data to be generated by the transducers TrF and TrB,
respectively.
[0031]
When analog musical tone signals are input from various I / Fs 34, they are divided by the
distributing unit 33 into high-tone musical tone signals and middle- and low-tone musical tone
signals, which are respectively supplied to the transducers TrF and TrB. Ru. Therefore, the
frequency bands of the transducers TrF and TrB are different, and the transducer TrF for exciting
the top plate 11 is responsible for the higher frequency bands.
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[0032]
When automatic performance data such as MIDI is input from the various I / Fs 34, the CPU 31
generates the waveform data group dF, based on information such as pitch and key depression
velocity in the automatic performance data read out sequentially. The waveform data is selected
from dB, and a waveform signal is generated from the selected waveform data and sent to the
distribution unit 33. Then, the distributing unit 33 converts the sent waveform signals into
analog tone signals and supplies them to the transducers TrF and TrB.
[0033]
From the viewpoint of simplifying the configuration, without providing a CPU, an input terminal
for an acoustic signal may be provided, and the transducers TrF and TrB may be driven by the
input acoustic signal.
[0034]
According to the present embodiment, when the stand 20 supports the guitar 100, the
transducers TrF and TrB contact the resonance drum 10, and the resonance drum 10 can be
vibrated. Therefore, the resonance drum of a general stringed instrument (guitar 100) can be It
can be used to generate rich sound by using vibrators (transducers TrF and TrB).
In addition, while the guitar 100 is supported by the stand 20, it is possible to vibrate the
resonance drum 10 for a long time by the transducers TrF and TrB without playing. As a result, it
is possible to expect an effect of promoting so-called aging, in which the tone is improved in the
same manner as when the performer plays the guitar 100 for a long time.
[0035]
In addition, since the transducers TrF and TrB excite the top plate 11 and the back plate 12
respectively, the two opposing main vibration walls (the top plate 11 and the back plate 12) are
simultaneously vibrated to efficiently generate rich sound. It can be done. In addition, since the
positions of the transducers TrF and TrB are made different from each other when viewed from
the direction substantially perpendicular to the front plate 11, suitable locations of the front
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plate 11 and the back plate 12 can be excited.
[0036]
In addition, even when the transducers TrF and TrB do not immediately abut on the front plate
11 and the back plate 12 when the supported portion 19 is supported by the bottom portion 23,
both can be supported by a simple supporting operation by tilting the resonance drum 10. It can
be put in contact.
[0037]
A modification of the present embodiment will be described with reference to FIG.
[0038]
FIGS. 3A and 3B are side views showing modifications of the transducer Tr.
First, as shown in FIG. 3A, it is preferable that the transducer TrF has a variable angle joint 24
and be urged in a direction to be upright.
Examples of the joint portion 24 include, for example, a universal joint and a gimbal. As the angle
of the transducer TrF is variable, the transducer TrF can be easily brought into contact with the
front plate 11 appropriately. Further, as shown in FIG. 3B, the transducer TrF may be configured
to have the elastic portion 25 in a part thereof. The elastic deformation of the elastic portion 25
makes it easy for the transducer TrF to properly contact the front plate 11.
[0039]
Since the joint portion 24 or the elastic portion 25 is adopted, and the tips of the transducers TrF
and TrB are formed in a convex curved surface, the transducer TrF and the front plate 11
transmit sufficient vibration while being in contact with point contact. can do. That is, by
combining the joint portion 24 or the elastic portion 25 with the tip shape of the convex curved
surface, it is possible to secure an appropriate contact state with many types of guitars. From the
viewpoint of vibration transmission efficiency, it is advantageous for the transducer to be in
surface contact with the excitation surface. If a flat surface is provided at the tip of the
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transducers TrF and TrB and the joint portion 24 is adopted, it is possible to secure surface
contact with the excitation surface. However, there is no particular problem if the vibration
direction of the transducer is substantially perpendicular to the vibration surface, and the
vibration transmission function is sufficiently performed even in the configuration in which point
contact is performed by the convex curved surface as described above. Moreover, in the case of
point contact, there is an advantage that the excitation direction can be made substantially
perpendicular to the excitation surface in various contact states.
[0040]
Thus, the configuration of FIG. 3 (a) or FIG. 3 (b) absorbs variations in size, shape, and placement
of the resonator 10 depending on the model, and can be widely compatible with many types of
guitars. it can. It is necessary to provide the joint portion 24 and the elastic portion 25 with an
appropriate hardness to the extent that the vibration of the transducer TrF can be properly
transmitted to the front plate 11. The configuration of FIG. 3 (a) or FIG. 3 (b) can also be applied
to the transducer TrB.
[0041]
FIG.3 (c), (d) is a side view which shows the modification of the stand 20. As shown in FIG. FIG. 3
(c) shows the support state of the guitar 100, and FIG. 3 (d) shows the support state.
[0042]
As shown in FIG. 3C, in the U-shaped portion where the bottom portion 23 of the stand 20, the
forearm 21 and the rear arm 22 exhibit in a side view, the forearm 21 and the rear arm 22
become closer to each other as their tips Configure to As a result, the distance between the
transducer TrF and the transducer TrB is set smaller than in the example of FIG. 1A, and is set
slightly smaller than the thickness of the resonance drum of a general guitar. Furthermore, in the
stand 20, at least one of the front arm 21 and the rear arm 22 is elastically bendable in the
spreading direction.
[0043]
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12
In the step of inserting the resonance cylinder 10 between the transducers TrF and TrB, the front
plate 11 and the back plate 12 of the resonance cylinder 10 abut on the transducers TrF and
TrB. The user continues to insert the resonance barrel 10 as it is, and brings the supported
portion 19 into contact with the support portion (bottom portion 23). At that time, by elastically
deforming in a direction in which the forearm 21 and the rear arm 22 (mainly the rear arm 22)
open, the distance between the transducers TrF and TrB becomes large, and the supported
portion 19 opposes and abuts on the bottom 23; It becomes a normal support state. Thus, the
transducers TrF and TrB can be appropriately brought into contact with the front plate 11 and
the back plate 12 with an appropriate force by a simple supporting operation. In addition, you
may apply combining the structure of FIG. 3 (a), (b), (c) suitably.
[0044]
(Second Embodiment) By the way, in order to excite the main vibrating wall of the resonance
drum 10 efficiently, the supported portion supported by the stand 20 is a portion of the guitar
100 which does not disturb the vibration of the main vibrating wall. It is preferable to In the first
embodiment, the supported portion 19 (the side plate 13, the edge portion 17 of the front plate
11, or the edge portion 18 of the back plate 12) is supported. In the second embodiment of the
present invention, the head support portion is a supported portion.
[0045]
FIG. 4A is a perspective view of a support according to the second embodiment. The stand 20,
which is a support, has a bifurcated head support 26 at the top. The user passes the neck 16 of
the guitar 100 through the forked portion of the head support 26 and hooks the head 9 of the
guitar 100 on the head support 26 to hold the guitar 100 on the head support 26 so as to
suspend it. The transducer TrB is disposed at a height at which the resonance cylinder 10 is
located at the lower part of the stand 20. The transducer TrB abuts on the back plate 12 of the
resonance cylinder 10 of the guitar 100 in the suspended state with an appropriate force.
[0046]
Moreover, the structure shown in FIG.4 (b) is mentioned as a modification of the stand 20 of a
stationary type. In the example shown in FIG. 4 (b), unlike the example shown in FIG. 4 (a), the
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head support 26 plays a role of supporting the guitar 100 so that it does not move back and
forth. Two transducers TrS for exciting the side plate 13 are provided at positions in contact with
the side plate 13 of the resonance cylinder 10 at the lower part of the stand 20. In this case, the
main load of the guitar 100 is received by the transducer TrS.
[0047]
In addition, you may employ ¦ adopt the structure which combined the example shown in FIG.4
(b), and the example shown in FIG.1 (a)-(c). In this case, a transducer TrS is provided at the
bottom 23 of the stand 20 of FIGS. 1A to 1C instead of the transducers TrF and TrB.
Alternatively, the transducers TrF and TrB may be omitted. In such a combination configuration,
as shown in FIGS. 1A to 1C, the supported portion 19 may be supported by the bottom portion
23 and the bottom portion 23 may receive the main load of the guitar 100. In this case, the
transducer TrS abuts on the side plate 13 but does not receive much load of the guitar 100. The
transducer TrS may be in contact with the front plate 11 or the back plate 12 depending on the
U-shaped design of the stand 20.
[0048]
Generally, the sound is better if a certain amount of load is applied to the transducer. Therefore,
in the case of the configuration shown in FIG. 4A, it is preferable to appropriately set the amount
of protrusion of the transducer TrB and the like so that an appropriate load is applied to the
transducer TrB using the weight of the guitar 100. Alternatively, the protrusion amount of the
transducer TrB may be adjustable. Also in the case of the configuration shown in FIG. 4B, the
sound may be improved by applying an appropriate load to the transducer TrS using the weight
of the guitar 100.
[0049]
In addition, a wall hanging type stand 20 shown in FIG. 4C may be adopted. The plate-like
mounting portion 28 of the stand 20 is fixed to a wall 8 such as a room. From the attachment
portion 28, the extension portion 29 is extended obliquely in the direction away from the wall
portion 8. A transducer TrB is provided below the extension portion 29. When the head 9 of the
guitar 100 is hooked to the head support 26 and the guitar 100 is suspended, the transducer TrB
abuts on the back plate 12 of the resonance drum 10 with an appropriate force.
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[0050]
In the configuration of the neck suspension type as shown in FIG. 4 (a) or 4 (c), the top plate 11,
the back plate 12 and the side plate 13 may be vibrated. Therefore, the transducers TrF and TrS
may be added in the configuration of FIG. 4 (a) or FIG. 4 (c). In the configuration of FIG. 4A in
that case, the main load may be received by the head support 26.
[0051]
According to the present embodiment, the same effects as those of the first embodiment can be
achieved with regard to generating rich sound by the vibrator using the resonance cylinder of a
general stringed instrument.
[0052]
Third Embodiment FIGS. 5 (a) and 5 (b) are a side view and a front view of a support according to
a third embodiment of the present invention.
A stand 20 as a support has a bottom 7 and a back wall 6, and a plurality of extending portions
27 extend from the top of the back wall 6. The bottom portion 7 is provided with transducers
TrF, TrB, TrS for exciting the front plate 11, the back plate 12, and the side plate 13, respectively.
[0053]
The user inserts the resonance drum 10 between the transducers TrF and TrB and abuts the side
plate 13 on the transducer TrS disposed on the back wall 6 and the neck 16 of the guitar 100
between the two adjacent extension parts 27. Pass through. Then, the head 9 is knocked down to
the back wall 6 side. As a result, the transducers TrF, TrB, and TrS abut on the top plate 11, the
back plate 12, and the side plate 13, respectively. Note that some of the transducers TrF, TrB,
and TrS may be omitted.
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[0054]
According to this embodiment, it is possible to excite a large number of points with relatively
small space. In addition, by arranging the stands 20 continuously or providing a plurality of sets
of two extending portions 27, a large number of guitars can be excited simultaneously with a
relatively small space. Therefore, there is an advantage that it is possible to efficiently perform an
ensemble by excitation of a plurality of guitars, an aging process of a plurality of guitars at a
guitar production site, and the like.
[0055]
The posture of the guitar 100 when supported by the stand 20 is not limited to the standing
posture, and for example, as shown in FIG. 6A, the thickness direction of the resonance drum 10
is substantially horizontal and the guitar 100 is inclined. The transducers TrF and TrB may be
provided on the holding stand 20.
[0056]
Alternatively, as shown in FIGS. 6B and 6C, the transducers TrF and TrB may be provided on a
stand 20 that holds the resonance drum 10 of the guitar 100 with the thickness direction of the
resonance drum 10 substantially vertical.
Specifically, in the stand 20 shown in FIGS. 6B and 6C, the arm 41 is extended from the bottom
43, the transducer TrB is provided in the bottom 43, and the transducer TrF is provided in the
arm 41. The bottom portion 43 is formed with a support surface 42 which is a tapered surface so
as to surround the transducer TrB.
[0057]
When the user inserts the resonance cylinder 10 between the transducers TrF and TrB, the edge
18 of the back plate 12 is supported by the support surface 42 by the weight of the resonance
cylinder 10. The transducer TrB has a joint portion 24 and is biased in a direction to be erected
straight. When the edge 18 abuts on the support surface 42, the transducer TrB abuts on the
back plate 12 so that a proper load is applied to the transducer TrB. At the same time, the
transducer TrF also abuts on the front plate 11 with an appropriate force due to the elasticity of
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the arm 41.
[0058]
According to the present embodiment, the same effects as those of the first embodiment can be
achieved with regard to generating rich sound by the vibrator using the resonance cylinder of a
general stringed instrument.
[0059]
(Fourth Embodiment) It is assumed that the support described in FIGS. 1 to 6 is a support for
supporting a stringed instrument.
However, from the viewpoint of generating a rich sound by the vibrator using the resonance
drum of the stringed instrument, the configuration does not necessarily have to be recognized as
a support (stand). For example, it may be recognized as an excitation device of a stringed
instrument. It is possible to grasp the stand 20 having the configuration described in FIGS. 1 to 6
as a vibrating device.
[0060]
In the fourth embodiment of the present invention, a configuration specialized to a vibration
apparatus for a stringed instrument will be described. FIGS. 7 (a) and 7 (b) are a side view and a
front view of the stringed instrument to which the vibration exciter according to the fourth
embodiment is attached.
[0061]
The excitation device 120 is a headphone type device, and is configured in a U-shape in a side
view. Arms 121 and 122 extend from both sides of the bridge portion 123 of the excitation
device 120. The longer arm 122 is provided with a transducer TrB, and the shorter arm 121 is
provided with a transducer TrF. The vibration device 120 is configured in the same manner as
the stand 20 described in FIGS. 3C and 3D, at least one of the arms 121 and 122 has elasticity,
and the distance between the transducers TrF and TrB is generally It is set a little smaller than
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the thickness of the resonance drum of the classic guitar. Two arms 121 are provided at intervals
larger than the width of the neck 16. The control unit is not shown.
[0062]
The vibration device 120 is assumed to be used in a state in which the guitar 100 is supported
by any support so that the thickness direction of the resonance drum 10 is in the horizontal
direction. For example, as shown in FIGS. 7 (a) and 7 (b), the resonance barrel 10 of the guitar
100, which is erected so as to extend upward, is engaged from above with the U-shaped portion
of the vibration device 120 interposed. Let Then, the lower surface of the bridge portion 123
becomes the engaging portion K1, and the upper portion of the side plate 13 (portion near the
neck 16) becomes the engaged portion K2, and the engaging portion K1 engages with the
engaged portion K2. Be done. At that time, in the resonance barrel 10 sandwiched between the
transducers TrF and TrB, the transducers TrF and TrB respectively abut the top plate 11 and the
back plate 12 with an appropriate force due to the elasticity of the arms 121 and 122.
[0063]
Thereby, it is possible to generate rich sound by the exciter using the two opposing walls of the
resonance cylinder of a general stringed instrument.
[0064]
7A and 7B illustrate the excitation device 120 in the form of being hooked on the guitar 100 in
the upright position, the attitude of the guitar 100 when the excitation device 120 is used does
not matter.
In addition, an excitation device 120 having an engaging portion (K1) engaged with the engaged
portion (K2) of the stringed instrument, the transducer Tr so as to excite the two main vibration
walls in opposite positions to each other. The present invention can be applied to any vibration
apparatus that provides
[0065]
The manner of engagement is not limited to the illustrated one, but it does not matter, but in
order to excite the main vibrating wall efficiently, the engaged portion (K2) is a portion of the
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stringed musical instrument that does not disturb the vibration of the main vibrating wall. It is
desirable to
[0066]
In addition, it is not essential to provide the engaging part K1 and the to-be-engaged part K2.
That is, an aspect in which the excitation device 120 contacts the musical instrument with only
the transducer Tr and the transducer Tr sandwiches the resonance drum (for example, in the
example of FIG. 7, an embodiment in which the bridge portion 123 floats without contacting the
guitar 100) It may be a configuration used in. This may be the case where the user holds and
uses the vibration device 120 by hand.
[0067]
By the way, when the stand 20 described in FIGS. 1 to 3 is grasped as an excitation device, the
supported portion 19 corresponds to the engaged portion K2, and the bottom portion 23
corresponds to the engaging portion K1. When the stand 20 described with reference to FIGS. 4
and 5 is grasped as an excitation device, the head 9 or the neck 16 corresponds to the engaged
portion K2, and the head support portion 26 and the extension portion 27 correspond to the
engaging portion K1. Equivalent to. When the stand 20 described with reference to FIGS. 6B and
6C is grasped as an excitation device, the edge portion 18 corresponds to the engaged portion
K2, and the support surface 42 corresponds to the engagement portion K1.
[0068]
Of the configurations of the stand 20 described with reference to FIGS. 1 to 6, those applicable to
the vibration excitation apparatus 120 may be applied. For example, when viewed from a
direction substantially perpendicular to the front plate 11, the excitation position of the
transducers TrF and TrB is different, the transducer TrF and TrB receives different frequency
bands, and the tips of the transducers TrF and TrB are convexly curved. The point and the like
can also be applied to the vibration apparatus 120.
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[0069]
In each of the above embodiments, the number of transducers Tr for exciting the same surface
may be one or more. In addition, it is not essential to simultaneously vibrate a plurality of
surfaces as illustrated, and a configuration in which a part of the transducers Tr is omitted may
be employed. Furthermore, the present invention is not limited to the one that excites the main
vibrating wall, and excites only the portion other than the main vibrating wall (the side plate 13,
the edge 17 of the front plate 11, the edge 18 of the back plate 12, etc.) Are not excluded from
the present invention.
[0070]
Although the present invention has been described in detail based on its preferred embodiments,
the present invention is not limited to these specific embodiments, and various embodiments
within the scope of the present invention are also included in the present invention. included.
You may combine suitably one part of the above-mentioned embodiment and modification.
[0071]
DESCRIPTION OF SYMBOLS 10 resonance body, 11 front plate (1st main vibration wall), 12 back
plate (2nd main vibration wall), 13 side plate (connection wall) 17, 18 edge part, 19 supported
part, 20 stands, 23 Bottom part (support part), 100 acoustic guitar (stringed instrument), 120
excitation device, TrF transducer (first exciter), TrB transducer (second exciter), K1 engagement
part, K2 engaged part
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