WO2016027856A1

WO2016027856A1 - Support for stringed instrument and vibration device for stringed instrument

Info

Publication number: WO2016027856A1
Application number: PCT/JP2015/073382
Authority: WO
Inventors: 晋吾江國
Original assignee: ヤマハ株式会社
Priority date: 2014-08-21
Filing date: 2015-08-20
Publication date: 2016-02-25
Also published as: JP2016045316A

Abstract

A support for a stringed instrument having a resonance body comprises a support portion for supporting the stringed instrument, and a vibrator that comes into contact with the resonance body of the stringed instrument and vibrates the resonance body in a state where the support portion supports the stringed instrument.

Description

Stringed instrument support, stringed instrument vibration device

The present invention relates to a support for supporting a stringed instrument having a resonance body and a vibration apparatus for the stringed instrument.
This application claims priority on August 21, 2014 based on Japanese Patent Application No. 2014-168617 for which it applied to Japan, and uses the content for it here.

弦 Stringed instruments with a resonant body are known, such as acoustic guitars, basses, violins, ukuleles, and mandolins. For example, the resonance drum of a guitar is composed of a front plate, a back plate and a side plate. A sound hole is formed on the front plate. As a result, the strings vibrate, and as a result, mainly the front and back plates vibrate. Furthermore, the resonance cylinder resonates due to the vibration of the front plate and the back plate, and rich sound is generated.

Such a stringed instrument is known to generate sound using a resonance drum without depending on the performance of the user. For example, Patent Document 1 discloses a configuration in which a speaker is attached to a sound hole of a guitar and the resonance body functions as an enclosure for the speaker. Patent Document 2 discloses an acoustic accelerator in which a stringed instrument body such as a guitar is provided with a vibrating body such as a spring that applies string vibration to promote sound.

Japanese Utility Model Registration No. 3188252 Japanese Unexamined Patent Publication No. 2006-65276 Japanese Laid-Open Patent Publication No. 5-227585 Japanese Laid-Open Patent Publication No. 5-244677

However, in Patent Document 1, it is necessary to attach a speaker to a stringed instrument, and some processing for that is also required. For this reason, the configuration disclosed in Patent Document 1 is not easy to be widely applied to general (for example, commercially available) guitars and the like. Moreover, according to the structure of patent document 2, although sound promotion is achieved, it is not the structure for enjoying sound itself with the vibration by a vibrating body.

Other than stringed instruments, a speaker is also known in which a vibrating body is provided in a box with a sound hole to vibrate the box (see Patent Documents 3 and 4). However, these configurations are not widely applicable to general stringed instruments.

The present invention was made to solve the above problems. An example of an object of the present invention is to make it possible to generate rich sound by a vibrator using a resonance drum of a general stringed instrument.

In order to achieve the above object, a support for a stringed musical instrument having a resonance body according to the first embodiment of the present invention includes a support for supporting the stringed musical instrument, and a state in which the support supports the stringed musical instrument. A vibration exciter that abuts on the resonance drum of the stringed instrument and vibrates the resonance drum.

In order to achieve the above object, a vibration apparatus for a stringed musical instrument having a resonance body having a first wall and a second wall different from each other according to a second embodiment of the present invention abuts on the first wall. A first vibrator that vibrates the first wall, and a second vibrator that abuts the second wall and vibrates the second wall.

According to the support according to the embodiment of the present invention, rich sound can be generated by a vibrator using a resonance body of a general stringed instrument.

According to the vibration device according to the embodiment of the present invention, rich sound can be generated by the vibrator using two different walls of the resonance body of a general stringed musical instrument.

It is a side view of the support body concerning a 1st embodiment of the present invention. It is a front view of the support body (stand) which concerns on the 1st Embodiment of this invention. It is a side view of the support body concerning a 1st embodiment of the present invention. It is a front view of the 1st modification of the stand which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the control part of the stand shown to FIG. 1A. It is a side view showing the 1st modification of a transducer of a stand concerning a 1st embodiment of the present invention. It is a side view which shows the 2nd modification of the transducer of the stand which concerns on the 1st Embodiment of this invention. It is a side view which shows the 2nd modification of the stand which concerns on the 1st Embodiment of this invention. It is a side view which shows the 2nd modification of the stand which concerns on the 1st Embodiment of this invention. It is a perspective view of the support body (stand) which concerns on the 2nd Embodiment of this invention. It is a perspective view of the 1st modification of the stand which concerns on the 2nd Embodiment of this invention. It is a perspective view of the 2nd modification of the stand which concerns on the 2nd Embodiment of this invention. It is a side view of the support body (stand) which concerns on the 3rd Embodiment of this invention. It is a front view of the support body which concerns on the 3rd Embodiment of this invention. It is a side view which shows the 1st modification of the stand which concerns on the 3rd Embodiment of this invention. It is a side view showing the 2nd modification of a stand concerning a 3rd embodiment of the present invention. It is a top view which shows the 2nd modification of the stand which concerns on 3rd Embodiment. It is a side view of the stringed musical instrument to which the vibration apparatus which concerns on the 4th Embodiment of this invention was attached. It is a front view of the stringed musical instrument to which the vibration apparatus which concerns on the 4th Embodiment of this invention was attached.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1A is a side view of a support according to a first embodiment of the present invention. FIG. 1B is a side view of the support according to the first embodiment of the present invention. The support (support) shown in FIGS. 1A and 1B is configured to support a stringed instrument having a resonance body. 1A and 1B show an acoustic guitar 100 as an example of a stringed instrument and a guitar stand 20 as an example of a support. The stringed instrument supported by the support to which the first embodiment of the present invention is applied may be any stringed instrument as long as it has a resonance body. Specific examples of stringed instruments may include acoustic bass, violin, ukulele, mandolin. The stringed instrument may be an electric stringed instrument provided with a sensor such as a pickup as long as the stringed instrument has a resonance body. Specific examples of electric stringed instruments may include an electric acoustic guitar, bass, violin, ukulele, mandolin.

As shown in FIGS. 1A and 1B, the guitar 100 has a neck 16 and a resonance body 10. A string 14 is stretched from the neck 16 to the resonance cylinder 10. The resonance cylinder 10 includes a front plate 11, a back plate 12 and a side plate 13. The front plate 11 is substantially parallel to and opposed to the back plate 12. The side plate 13 is generally a connecting wall that connects the edge 17 of the front plate 11 and the edge 18 of the back plate 12. The side plate 13 has higher rigidity than the front plate 11 and the back plate 12. A sound hole 15 is formed on the front plate 11. The front plate 11 and the back plate 12 serve as main vibration walls that mainly vibrate.

The stand 20 has a control unit 101. In the example illustrated in FIG. 1A, the control unit 101 is integral with the stand 20. However, the configuration is not limited to such a configuration, and the control unit 101 may be separated from the stand 20. The stand 20 has a bottom 23, two front arms 21 and one rear arm 22. The front arm 21 is disposed on the front side. The rear arm 22 is disposed rearward. The front end portion of the bottom portion 23 is connected to the lower end of the front arm 21. The rear end of the bottom 23 is connected to the lower end of the rear arm 22. The front arm 21 and the rear arm 22 face each other across the bottom 23. When viewed from the side of the stand 20, the combination of the bottom 23, the front arm 21 and the rear arm 22 has a U-shape. Each of the front arms 21 is provided with a transducer TrF. The transducer TrF faces the inside of the U-shaped portion of the stand 20. That is, the transducer TrF is provided at the upper end of the inner surface of the front arm 21 (the surface facing the rear arm 22). The transducer TrF is configured to vibrate the front plate 11. The rear arm 22 is provided with a transducer TrB. The transducer TrB faces the inside of the U-shaped portion of the stand 20. That is, the transducer TrB is provided at the upper end of the inner surface of the rear arm 22 (the surface facing the front arm 21). The transducer TrB is configured to vibrate the back plate 12. The transducer TrF and the transducer TrB may be collectively referred to as a transducer Tr. The transducer Tr is a vibrator that vibrates according to an acoustic signal (musical sound signal) supplied as a drive signal and generates sound by exciting (exciting) a target. The transducer Tr is driven by the control unit 101 (details will be described later with reference to FIG. 2).

The basic shape of the stand 20 may be the same as a general (commercially available) stand. It is also possible to obtain the stand 20 according to the first embodiment of the present invention by providing the control unit 101 and the transducer Tr in a stand having a general configuration. The stand 20 supports the resonance body 10 of the guitar 100 with the neck 16 facing upward by the bottom 23, the front arm 21 (transducer TrF provided on the front arm 21), and the rear arm 22 (transducer TrB provided on the rear arm 22). The bottom 23, the front arm 21 (transducer TrF provided on the front arm), and the rear arm 22 (transducer TrB provided on the rear arm 22) may be an example of a support portion. The bottom portion 23 is a main support portion that receives the resonance cylinder 10. A supported portion 19 in which the lower portion of the resonance cylinder 10, specifically, the side plate 13, the edge portion 17 of the front plate 11, and the edge portion 18 of the back plate 12 are supported by the bottom portion 23 in a posture in which the neck 16 faces upward. It becomes.

When the guitar 20 is supported by the stand 20, the resonance cylinder 10 is inserted between the U-shaped portion of the stand 20, that is, between the transducer TrF and the transducer TrB, and the supported portion 19 of the resonance cylinder 10 is supported by the support portion (bottom portion). 23). As the guitar 100, a general guitar is assumed. Therefore, in order to give the stand 20 versatility, the distance between the transducer TrF and the transducer TrB is the thickness of the resonance body of a general guitar (distance between the outer surface of the front plate 11 and the outer surface of the back plate 12). Is set larger than.

FIG. 1A shows a state immediately after the resonance cylinder 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 first embodiment, the normally supported state is a state in which the supported portion 19 is supported by the bottom portion 23, the transducer TrF is in contact with the front plate 11, and the transducer TrB is attached to the back plate 12. A state of contact.

The position of the transducer TrB is higher than the transducer TrF. Therefore, as shown in FIG. 1A, when the supported portion 19 is supported by the bottom portion 23 and the transducers TrF and TrB are not in contact with the front plate 11 and the back plate 12, respectively, the side where the transducer TrB is present. By tilting the resonance cylinder 10 (rearward), the transducers TrF and TrB come into contact with the front plate 11 and the back plate 12, respectively (see FIG. 1C). As long as the transducers TrF and TrB are in contact with the front plate 11 and the back plate 12, the contact point of contact with the bottom 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.

When the guitar 100 is normally supported by the stand 20, the transducer TrF and the transducer TrB are viewed from a direction substantially perpendicular to the front plate 11 (that is, viewed from the axial direction (vibration direction) of the transducer TrF or the transducer TrB). And the position is different. The stand 20 is installed on the floor, and the transducer TrB is positioned above the transducer TrF in a state where the transducers TrF and TrB are higher than the bottom 23. The transducer TrB contacts the back plate 12 at a position farther than the transducer TrF with respect to the side plate 13. The transducer TrF contacts the front plate 11 at a position closer to the transducer TrB with respect to the side plate 13.

The back plate 12 is suitable for generating mid to low frequency sound. For this reason, in order to increase the excitation efficiency, the transducer TrB is arranged so as to vibrate a position as close to the center as possible in the surface direction of the back plate 12. The front plate 11 is suitable for generating high frequency sound. For high-frequency sounds, the difference in excitation efficiency depending on the excitation position is small. Therefore, the transducer TrF may be arranged at a position close to the side plate 13. For both the front plate 11 and the back plate 12, if the vicinity of the center far from the side plate 13 is vibrated, the low range is emphasized. On the contrary, if the vicinity of the vicinity near the side plate 13 is vibrated, it is difficult for the low range to appear and the high range tends to be emphasized relatively. Therefore, the excitation position may be set in consideration of these viewpoints.

As shown in FIG. 1D, a bridge B and a pick guard P are provided on the front plate 11 of the guitar 100. The transducer TrF preferably vibrates a position avoiding the sound hole 15 or a position avoiding foreign matters such as the bridge B and the pick guard P, but is not limited to such a configuration. The transducer TrF may indirectly vibrate the front plate 11 by vibrating components fixed to the front plate 11 such as the bridge B and the pick guard P. Since the sound and localization slightly change depending on the excitation position of the transducers TrF and TrB, the arrangement of the transducers TrF and TrB may be set in consideration of them. This is because the localization of low-frequency sound generated from the back plate 12 is not clearly recognized, but the localization of the front plate 11 may be particularly useful. When both the front plate 11 and the back plate 12 are vibrated, the sound is localized between the front plate 11 and the back plate 12 (substantially the center in the thickness direction of the resonance cylinder 10). When sound is generated by applying vibration in this way, a natural localization feeling close to that when sound is generated by playing a musical instrument can be obtained.
The transducer TrF may be disposed at a position corresponding to the antinode position of the desired n-th normal mode on the front plate 11. That is, the transducer TrF may be disposed at a position where the desired anti-nth normal mode antinode position on the front plate 11 can be vibrated. When the transducer TrF is arranged in this way, when the transducer TrF vibrates the surface plate 11, the surface plate 11 is likely to vibrate at a frequency corresponding to the desired n-th normal mode. It tends to occur.
FIG. 1D is a front view of a first modification of the stand 20 according to the first embodiment. In the example shown in FIG. 1D, the transducer TrF is arranged in the vicinity of the bridge B. More specifically, the transducer TrF is disposed on the lower side of the bridge B in the front plate 11. In the example shown in FIG. 1D, the transducer TrB may not be provided.
The antinode of vibration in the first normal mode (basic mode) of the front plate 11 exists near the bridge B of the guitar 100. For this reason, when the transducer TrF vibrates the front plate 11 in the state shown in FIG. 1D, vibration of a low frequency (basic frequency) corresponding to the vibration in the first normal mode is likely to occur in the front plate 11. As a result, it becomes easy to generate low frequency sound in the guitar 100. Therefore, according to the stand 20 shown in FIG. 1D, it is possible to cause the guitar 100 to generate a sound close to the actual guitar sound.

The tips of the transducers TrF and TrB are formed in a convex curved surface such as a spherical surface. Here, depending on the shape (type) and size of the guitar 100, the angles of the front plate 11 and the back plate 12 in a state where the guitar 100 is normally supported by the stand 20 may be different. Therefore, since the tips of the transducers TrF and TrB have a convex curved surface, it is easy to ensure a contact state, so the stand 20 can be widely applied to many types of guitars.

FIG. 2 is a block diagram showing the configuration of the control unit 101.

A CPU (central processing unit) 31 accepts an input from the operator 32 via the bus 36. The CPU 31 controls various I / Fs (interfaces) 34, the distribution unit 33, and the memory 35. Although not shown, the CPU 31 includes a ROM (read） only memory), a RAM (random access memory), a timer, and the like. Various I / Fs 34 include an interface conforming to the MIDI (musical instrument digital instrument) standard, an interface for inputting a musical sound signal, and the like.

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 sound generated by sampling a musical sound waveform such as a guitar, and has a volume envelope. The waveform data groups dF and dB are data for generating sound by the transducers TrF and TrB, respectively.

When analog music signals are input from various I / Fs 34, the distribution unit 33 divides the input music signal into a high frequency music signal and a middle frequency and low frequency music signal. The distribution unit 33 supplies the high frequency tone signal to the transducer TrF. The distributor 33 supplies the mid-range and low-range musical sound signals to the transducer TrB. As described above, the frequency bands handled by the transducer TrF and the transducer TrB are different. The transducer TrF that vibrates the front plate 11 has a higher frequency band than the transducer TrB.

The case where automatic performance data of data standards such as MIDI is input from various I / Fs 34 will be described. In this case, the CPU 31 selects waveform data from the waveform data groups dF and dB based on information such as pitches and key depression velocities in the automatic performance data that are sequentially read, and generates a waveform signal from the selected waveform data. To the distribution unit 33. The distribution unit 33 converts the transmitted waveform signal into an analog tone signal and supplies them to the transducers TrF and TrB.

From the viewpoint of simplifying the configuration, the control unit 101 does not include a CPU, but includes an input terminal for an acoustic signal, and the control unit 101 drives the transducers TrF and TrB with the acoustic signal input to the input terminal. You may comprise as follows.

According to the first embodiment, when the guitar 100 is supported on the stand 20, the transducers TrF and TrB abut on the resonance cylinder 10, and the resonance cylinder 10 can be vibrated by the transducers TrF and TrB. Therefore, rich sound can be generated by the vibrator (transducers TrF and TrB) using the resonance drum of a general stringed instrument (guitar 100). Further, it is also possible to vibrate the resonance cylinder 10 with the transducers TrF and TrB for a long time without playing the guitar while the guitar 100 is supported on the stand 20. As a result, the effect of promoting so-called aging, in which the timbre is improved in the same manner as when the player has played the guitar 100 for a long time, can be expected.
When the sound of the sound range desired by the user is generated on the guitar 100 by the transducers TrF and TrB, the tone of the guitar 100 in the desired sound range can be improved by aging.
When signals indicating white noise are input to the transducers TrF and TrB, the transducers TrF and TrB cause the guitar 100 to generate sound in the entire range. For this reason, the timbre of the guitar 100 in the whole sound range can be improved by aging.

The transducers TrF and TrB vibrate the front plate 11 and the back plate 12, respectively. Therefore, two opposing main vibration walls (the front plate 11 and the back plate 12) can be vibrated at the same time, and rich sounds can be generated efficiently. Moreover, the positions of the transducers TrF and TrB are made different from each other when viewed from a direction substantially perpendicular to the front plate 11 (that is, viewed from the axial direction (excitation direction) of the transducers TrF and TrB). For this reason, the transducers TrF and TrB can vibrate suitable portions of the front plate 11 and the back plate 12 respectively. Moreover, since the guitar 100 can be held in a state of being twisted as shown in FIG. 1C, the guitar 100 can be prevented from falling.

Even if the transducers TrF and TrB are not immediately brought into contact with the front plate 11 and the back plate 12 when the supported portion 19 is supported on the bottom 23, the transducer TrF and TrB can be simply operated by tilting the resonance cylinder 10. Can be brought into contact with the front plate 11 and the back plate 12.

A modification of the transducer Tr of the stand 20 according to the first embodiment will be described with reference to FIGS. 3A and 3B. A second modification of the stand 20 according to the first embodiment will be described with reference to FIGS. 3C and 3D.

FIG. 3A is a side view showing a first modification of the transducer Tr. FIG. 3B is a side view showing a second modification of the transducer Tr. As shown in FIG. 3A, the transducer TrF has a joint portion 24 with a variable angle, and is biased in a direction in which the transducer TrF stands upright. Specific examples of the joint portion 24 may include a universal joint, a gimbal, and the like. By making the angle of the transducer TrF variable, the transducer TrF can easily come into contact with the front plate 11 appropriately. As shown in FIG. 3B, the transducer TrF has an elastic portion 25 in a part thereof. Due to the elastic deformation of the elastic portion 25, the transducer TrF can easily come into contact with the front plate 11 appropriately. Specific examples of the elastic portion 25 may include rubber and a spring.

3A and 3B, the joint portion 24 or the elastic portion 25 is employed, and the tips of the transducers TrF and TrB are formed in a convex curved surface. For this reason, the transducer TrF and the front plate 11 can transmit sufficient vibration while being in point contact. That is, by combining the joint portion 24 and the elastic portion 25 with the tip shape of the convex curved surface, it is possible to ensure an appropriate contact state with many types of guitars. If a flat surface is provided at the tips of the transducers TrF and TrB and the joint portion 24 is employed, it is possible to ensure surface contact with the vibration surface. However, if the excitation direction of the transducer is substantially vertical with respect to the excitation surface, the vibration transmission function can be sufficiently performed even with the configuration in which the point is brought into contact with the convex curved surface as described above. Moreover, the point contact has an advantage that the excitation direction can be made substantially vertical with respect to the excitation surface in various contact states.

As described above, the configuration shown in FIG. 3A or FIG. 3B can absorb the difference in size and shape of the resonance cylinder 10 and the variation in the placement depending on the model, and can be widely applied to many kinds of guitars. The joint portion 24 and the elastic portion 25 need to have appropriate hardness to such an extent that the vibration of the transducer TrF can be properly transmitted to the front plate 11. The configuration of FIG. 3A or FIG. 3B can also be applied to the transducer TrB.

FIGS. 3C and 3D are side views showing a second modification of the stand 20. FIG. 3C shows a state where the guitar 100 is being supported by the stand 20. FIG. 3D shows a state where the guitar 100 is supported by the stand 20.

As shown in FIG. 3C, in the U-shaped portion where the combination of the bottom 23, the front arm 21 and the rear arm 22 of the stand 20 is shown in a side view, the front arm 21 and the rear arm 22 are closer to each other toward the tip. Constitute. In the configuration shown in FIG. 3C, the interval between the transducer TrF and the transducer TrB is set to be narrower than the configuration in FIG. 1A. In the configuration shown in FIG. 3C, the distance between the transducer TrF and the transducer TrB is set to be slightly smaller than the thickness of a general guitar resonance drum. Further, in the stand 20, at least one of the front arm 21 and the rear arm 22 is configured to bend in an expanding direction (a direction in which the front arm 21 and the rear arm 22 are separated from each other) due to elasticity.

At the stage 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 come into contact with the transducers TrF and TrB. The user simply inserts the resonance cylinder 10 as it is (ie, rotates the resonance cylinder 10 around an axis perpendicular to the longitudinal axis of the guitar 100 and parallel to the front plate 11). It advances and makes the supported part 19 contact | abut to a support part (bottom part 23). At that time, at least one of the front arm 21 and the rear arm 22 (mainly the rear arm 22) is elastically deformed in the opening direction, the interval between the transducers TrF and TrB is increased, and the supported portion 19 is opposed to the bottom portion 23. Then, they come into contact with each other and become a normal support state. As described above, 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 operation, respectively. You may apply combining the structure of FIG. 3A, 3B, and 3C suitably.

(Second Embodiment)
In order to efficiently vibrate the main vibration wall of the resonance cylinder 10, a portion of the guitar 100 that does not hinder the vibration of the main vibration wall is preferably a supported portion supported by the stand 20. As the first embodiment, the configuration in which 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 has been described. Unlike the first embodiment, in the second embodiment of the present invention, the head support portion is a supported portion.

FIG. 4A is a perspective view of a support according to the second embodiment. FIG. 4A shows a stand 20 as an example of a support. The stand 20 has a bifurcated head support 26 at the top. The head support portion 26 may be an example of a support portion. The user passes the neck 16 of the guitar 100 through the bifurcated portion of the head support portion 26 and hooks the head 9 of the guitar 100 on the head support portion 26. As a result, the head support unit 26 holds the guitar 100 in a state where the guitar 100 is suspended. The transducer TrB is arranged at a height at which the resonance cylinder 10 is located at the lower part of the stand 20. The transducer TrB comes into contact with the back plate 12 of the resonance cylinder 10 of the guitar 100 in a suspended state with an appropriate force.

FIG. 4B is a perspective view of a first modification of the stand 20 according to the second embodiment. The stand 20 is a stationary type. In the example shown in FIG. 4B, unlike the example shown in FIG. 4A, the head support portion 26 plays a role of supporting the head 9 and the neck 16 so that the guitar 100 does not move forward and backward. Two transducers TrS are provided at positions where the lower portion of the stand 20 is in contact with the side plate 13 of the resonance cylinder 10. In this case, the main load of the guitar 100 is received by the transducer TrS. The transducer TrS is configured to vibrate the side plate 13. The transducer TrS may be an example of a support unit.
The side plate 13 has higher rigidity than the front plate 11 and the back plate 12. Therefore, when the transducer TrS applies vibration to the side plate 13, the vibration is transmitted to the front plate 11 and the back plate 12 through the side plate 13. Thus, the front plate 11 and the back plate 12 can be vibrated only by the transducer TrS.

4B may be combined with the example shown in FIGS. 1A to 1C. In this case, a transducer TrS is provided at the bottom 23 instead of one of the transducers TrF and TrB with respect to the stand 20 of FIGS. 1A to 1C. As another configuration example, a transducer TrS may be provided on the bottom 23, and both the transducers TrF and TrB may be omitted. In the case of such a combined 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 contacts the side plate 13 but does not receive a large load on the guitar 100. The U-shaped portion of the stand 20 may be designed so that the transducer TrS contacts the front plate 11 or the back plate 12.

In general, the sound is better when 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 protrusion amount 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. As another configuration, the projecting amount of the transducer TrB may be adjustable. In the case of the configuration shown in FIG. 4B as well, the sound may be improved by configuring the transducer TrS so as to apply an appropriate load by using the weight of the guitar 100.

FIG. 4C is a perspective view of a second modification of the stand 20 according to the second embodiment. The stand 20 shown in FIG. 4C is a wall-hanging type. The stand 20 has a plate-like attachment portion 28. The attachment portion 28 is fixed to the wall portion 8 such as a room. The stand 20 further includes an extension portion 29 that is connected to the attachment portion 28 and extends obliquely downward in a 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 on the head support portion 26 and the guitar 100 is suspended, the transducer TrB comes into contact with the back plate 12 of the resonance body 10 with an appropriate force.

A neck-suspended stand 20 as shown in FIG. 4A or 4C may vibrate the front plate 11, the back plate 12, and the side plate 13. Therefore, the stand 20 of FIG. 4A or 4C may further include the transducers TrF and TrS. In the configuration of FIG. 4A in that case, the head support 26 may receive a main load.

According to the second embodiment, the same effects as those of the first embodiment can be achieved with respect to generating rich sound by the vibrator using the resonance body of a general stringed instrument.

(Third embodiment)
FIG. 5A is a side view of a support according to a third embodiment of the present invention. FIG. 5B is a front view of the support according to the third embodiment of the present invention. The stand 20 as a support has a bottom portion 7, a back wall 6, two extending portions 27, and a connecting portion 30. The extending part 27 extends from the upper part of the back wall 6. The connecting portion 30 is fixed to the back wall 6 and connects the rear ends of the two extending portions 27 to each other. The combination of the two extending portions 27 and the connecting portion 30 has a U shape in a top view. The extension part 27 and the connection part 30 may be an example of a support part.
The back wall 6 is provided with a transducer TrS configured to vibrate the side plate 13. 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.

The user inserts the resonance body 10 between the transducers TrF and TrB, abuts the side plate 13 against the transducer TrS disposed on the back wall 6, and also places the neck 16 of the guitar 100 between two adjacent extending portions 27. Through. Then, the user tilts the head 9 toward the back wall 6 side. As a result, the transducers TrF, TrB, and TrS come into contact with the front plate 11, the back plate 12, and the side plate 13, respectively. 5A and 5B, some of the transducers TrF, TrB, TrS may be omitted.

According to the third embodiment, a large number of points can be vibrated with relatively little space.
As another configuration, the stands 20 may be continuously arranged. As another configuration, a plurality of sets of two extending portions 27 and connecting portions 30 may be provided. By adopting such a configuration, a large number of guitars can be vibrated simultaneously in a relatively small space. Therefore, there is an advantage that it is possible to efficiently perform an ensemble by oscillating a plurality of guitars, an aging process for a plurality of guitars at a guitar production site, and the like.

The posture of the guitar 100 when supported by the stand 20 is not limited to the standing posture. For example, as shown in FIG. 6A, transducers TrF and TrB may be provided on a stand 20 that holds the guitar 100 obliquely so that the thickness direction of the resonance cylinder 10 is substantially horizontal.

6B and 6C, transducers TrF and TrB may be provided on the stand 20 that holds the resonance body 10 of the guitar 100 so that the thickness direction of the resonance body 10 is substantially in the vertical direction. Specifically, the stand 20 shown in FIGS. 6B and 6C includes an arm 41 extending from the bottom 43, a transducer TrB provided on the bottom 43, and a transducer TrF provided on the arm 41. The bottom 43 has a support surface 42 that is a tapered surface surrounding the transducer TrB.

When the user inserts the resonance cylinder 10 between the transducers TrF and TrB, the edge 18 of the back plate 12 is supported on the support surface 42 by the weight of the resonance cylinder 10. The transducer TrB has a joint portion 24 and is urged in a direction in which the transducer TrB is standing upright. When the edge 18 comes into contact with the support surface 42, the transducer TrB comes into contact with the back plate 12 so that an appropriate load is applied to the transducer TrB. At the same time, the transducer TrF also comes into contact with the front plate 11 with an appropriate force due to the elasticity of the arm 41.

According to the third embodiment, the same effects as those of the first embodiment can be obtained with respect to generating rich sound by the vibrator using the resonance body of a general stringed instrument.

(Fourth embodiment)
The configuration shown in FIGS. 1A to 6C is a support for supporting a stringed instrument. However, the embodiment of the present invention is not limited to a configuration that is recognized as a support (stand) from the viewpoint of generating rich sound by a vibrator using a resonance drum of a stringed musical instrument. For example, the configuration according to the embodiment of the present invention may be a configuration recognized as a stringed instrument vibration device. The stand 20 having the configuration shown in FIGS. 1A to 6C is also grasped as a vibration device.

In the fourth embodiment of the present invention, a configuration specialized for a stringed instrument vibration device will be described. FIG. 7A is a side view of a stringed musical instrument to which a vibration exciter according to a fourth embodiment is attached. FIG. 7B is a front view of the stringed musical instrument to which the vibration exciter according to the fourth embodiment is attached.

7A and 7B is a headphone type device. The vibration device 120 is configured in a U shape in a side view. The vibration device 120 includes a bridge portion 123, two first arms 121 extending from one end of the bridge portion 123, and a second arm 122 extending from the other end of the bridge portion 123. The distance between the two first arms 121 is wider than the width of the neck 16. The first arm 121 is shorter than the second arm 122. A transducer TrB is provided on the second arm 122. The first arm 121 is provided with a transducer TrF. The vibration device 120 has the same configuration as the stand 20 shown in FIGS. 3C and 3D. That is, at least one of the first and

second arms

121 and 122 has elasticity. Further, the distance between the transducers TrF and TrB is slightly narrower than the thickness of a general guitar resonance drum. 7A and 7B, the control unit is not shown.

When using the vibration exciter 120, the guitar 100 may be supported by some support so that the thickness direction of the resonance cylinder 10 is along the horizontal direction. In this case, for example, as shown in FIGS. 7A and 7B, the resonance cylinder 10 of the guitar 100 erected so that the neck 16 is arranged upward is applied from above so as to be sandwiched between the U-shaped portions of the vibration device 120. The vibration device 120 may be engaged. In this case, the lower surface of the bridge portion 123 becomes the engaging portion K1. Further, the upper portion of the side plate 13 (the vicinity of the neck 16) becomes the engaged portion K2. Therefore, the engaging part K1 is engaged with the engaged part K2. At that time, in the resonance cylinder 10 sandwiched between the transducers TrF and TrB, the transducers TrF and TrB come into contact with the front plate 11 and the back plate 12 with an appropriate force by the elasticity of the first and

second arms

121 and 122, respectively.

This makes it possible to generate rich sound by the vibrator using the two opposing walls of the resonance drum of a general stringed instrument.

7A and 7B exemplify the vibration device 120 configured to be hooked on the guitar 100 in a standing posture. However, the posture of the guitar 100 when using the vibration device 120 is not limited to the example shown in FIGS. 7A and 7B. An excitation device having an engagement portion (K1) engaged with an engaged portion (K2) of a stringed musical instrument and a transducer Tr configured to vibrate two main vibration walls at opposite positions. If so, the fourth embodiment of the present invention is applicable.

The engagement mode is not limited to the illustrated mode. From the viewpoint of efficiently exciting the main vibration wall, it is desirable that the engaged portion (K2) is a portion of the stringed instrument that does not hinder the vibration of the main vibration wall. However, it is not limited to such a configuration.

It is not essential to provide the engaging portion K1 and the engaged portion K2. That is, the vibration device 120 may be in contact with the musical instrument using only the transducer Tr, and the transducer Tr may sandwich the resonance drum. For example, in the case of the configuration shown in FIG. 7A, the bridge portion 123 may be separated from the bridge portion 123 without contacting the guitar 100. When adopting such a configuration, for example, the vibration device 120 may be used in a state where the user grips the vibration device 120 with a hand.

When grasping the stand 20 shown in FIGS. 1A to 3D as a vibration device, the supported portion 19 corresponds to the engaged portion K2, and the bottom portion 23 corresponds to the engaging portion K1. When grasping the stand 20 shown in FIGS. 4A to 5B as a vibration device, the head 9 or the neck 16 corresponds to the engaged portion K2, and the head support portion 26, the extending portion 27, and the connecting portion 30 are engaged. It corresponds to the part K1. When grasping the stand 20 shown in FIGS. 6B and 6C as a vibration device, the edge portion 18 corresponds to the engaged portion K2, and the support surface 42 corresponds to the engaging portion K1.

The applicable configuration among the configurations of the stand 20 shown in FIGS. 1A to 6C may be applied to the vibration device 120. For example, a configuration in which the excitation positions of the transducers TrF and TrB are different from each other when viewed from a direction substantially perpendicular to the front plate 11 can be applied to the excitation device 120. A configuration in which the frequency bands handled by the transducer TrF and the transducer TrB are different can be applied to the vibration device 120. The configuration in which the tips of the transducers TrF and TrB are formed in a convex curved surface can be applied to the vibration device 120.

In each of the above embodiments, the number of transducers Tr for exciting the same surface may be one or more. Moreover, it is not essential to simultaneously excite a plurality of surfaces as in the illustrated configuration, and a configuration in which some of the transducers Tr are omitted may be used. Furthermore, the configuration is not limited to the configuration in which the transducer Tr vibrates the main vibration wall. For example, the transducer Tr may vibrate only the portion of the resonance cylinder 10 other than the main vibration wall (the side plate 13, the edge 17 of the front plate 11, the edge 18 of the back plate 12, etc.).

Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. Some of the above-described embodiments and modifications may be combined as appropriate.

The present invention may be applied to a stringed instrument support and a stringed instrument vibration device.

10 Resonance cylinder 11 Front plate (first main vibration wall)
12 Back plate (second main vibration wall)
13 Side plate (connection wall)
17, 18 Edge portion 19 Supported portion 20 Stand 23 Bottom portion (support portion)
100 Acoustic guitar (stringed instrument)
120 Exciter TrF transducer (first exciter)
TrB transducer (second vibrator)
K1 engaging part K2 engaged part

Claims

A support for a stringed instrument having a resonant body,
A support for supporting the stringed instrument;
In a state where the support portion supports the stringed instrument, a vibrator that abuts the resonance cylinder of the stringed instrument and vibrates the resonance cylinder;
A support for stringed musical instruments.
2. The stringed musical instrument support according to claim 1, wherein the vibration exciter is provided on the support.
3. The string instrument support according to claim 1, wherein the vibrator vibrates the wall by abutting against a wall of the resonance body in a state where the support portion supports the string instrument.
The wall has a first wall and a second wall facing each other,
4. The string instrument support according to claim 3, wherein the vibrator includes a first vibrator for vibrating the first wall and a second vibrator for vibrating the second wall. .
In a state where the support portion supports the stringed instrument, the positions of the first vibrator and the second vibrator differ from each other when viewed from a direction substantially perpendicular to the first wall. A support for a stringed musical instrument according to claim 4.
6. The support for a stringed instrument according to claim 1, wherein a portion of the vibrator that is in contact with the resonance cylinder has a convex curved surface shape.
A vibration device for a stringed instrument having a resonance body having a first wall and a second wall different from each other,
A first vibrator that abuts the first wall and vibrates the first wall;
A second vibrator that abuts against the second wall and vibrates the second wall;
An excitation device for a stringed instrument having
The string instrument excitation device according to claim 7, wherein the first wall and the second wall face each other.