JP7098219B1 - Stringed instrument exciter and stringed instrument exciter system - Google Patents

Abstract

A stringed instrument excitation device and a stringed instrument excitation system capable of playing a stringed instrument with high sound quality are provided. A stringed instrument excitation device (100) includes a body substrate (110) having an attachment surface (110a) for attaching a string (15) of a violin (1), and an engagement substrate (110) provided on the attachment surface (110a) for engaging the string (15) using the bending force of the string (15). and a vibration device connection surface 130 that is provided on a surface different from the mounting surface 110 a and connects the vibration device 30 . [Selection drawing] Fig. 2

Description

The present invention relates to a stringed instrument exciter and a stringed instrument exciter system.

Generally, a stringed instrument has a sounding body composed of a front plate (body plate), a back plate, and a side plate, and a sound hole is formed in the front plate. In a stringed instrument, a plate-shaped bridge base member is fixed to the front plate with an adhesive, and a piece (bridge) extending on the bridge base member in a direction orthogonal to the longitudinal direction of the string to support the string. ) Is attached.
Then, each string is locked to a bridge pin attached to a bridge base member at one end beyond the upper part of the bridge. Each of the strings is pressed against the upper surface of the bridge by applying tension to the other end of the string by a tension adjusting mechanism provided on the head side (tail side), and is defined in an effective position by the bridge.
A system has been proposed in which such a stringed instrument is used to reverberate the bridge of the stringed instrument from the outside by a vibrating means such as a piezoelectric vibrator or a speaker.

Patent Document 1 describes a piezoelectric vibration / transmission unit including a piezoelectric vibrator that vibrates by the output of an amplifier for automatic violin, a fixing jig for the piezoelectric vibrator, and a vibration transmitter, and an automatic violin that sounds by vibration of a piece. A vibrating and loudspeaker superimposed reproduction device comprising a speaker amplifier connected to a speaker line and a dynamic speaker connected to the speaker amplifier is described.

Patent Document 2 describes a device for vibrating a stringed instrument provided with a bridge, in which a base member having an action point portion to be in contact with the bridge and an electric signal attached to the base member are mechanically used. The base member includes a vibration generator that converts into vibration, and the base member engages with the upper surface of at least one string of the stringed instrument. Having a force point portion engaged with the lower surface of the string of the book and a means for displacing at least one of the fulcrum portion and the force point portion in a direction for urging the action point portion toward the bridge. The featured device is described.

Non-Patent Document 1 reports the results of a study in which the acoustic characteristics of Stradivarius were elucidated using a spherical microphone array. For example, it is said that the pattern of the intensity of radiation directivity expressed as a function of frequency was found to be similar among Stradivarius. Here, the strength of radiation directivity is an index of spatial radiation characteristics that show a high value so that sound is concentrated in a specific one-sided position. Also, regarding the pattern of radiation directivity intensity, the peak frequencies appearing in the mid range (around 1 kHz) and the high range (around 3 kHz) differ between Stradivarius and other violins (old, modern, and contemporary). It is said that it was.

Non-Patent Document 2 reports a radiation directivity pattern that calculates the strength of radiation directivity when playing a scale of various violins. There is a statement that it was considered that acoustic features appear in the peak and dip frequencies of the radiation directivity pattern and their frequency ratios.

Japanese Unexamined Patent Publication No. 2011-35551 WO2014 199613A1 Gazette

"Elucidation of the acoustic characteristics of old violins" 2016 Fiscal Year Research-status Report, Katsuhiro Maki et al., [Online], [Search on May 1, 3rd year of Reiwa], Internet <URL: https://kaken.nii. ac.jp/en/report/KAKENHI-PROJECT-16K00255/16K002552016hokoku/> "Radiation Directionality of Violin" Stradivarius "" Proceedings of the Acoustical Society of Japan Autumn Meeting (2017.9.25-27), Katsuhiro Maki et al., [Online], [Search on May 1, 3rd year of Reiwa], Internet <URL: http://www.asj.gr.jp/annualmeeting/pdf/2017autumn_timeschedule.pdf>

However, in the apparatus described in Patent Document 1, a violin is incorporated inside the body of the violin, which must be performed at the time of manufacturing the violin and cannot be treated as a normal violin. It is also conceivable to modify an existing violin to incorporate a violin, but such modifications to expensive violins are often unacceptable.

Further, in the vibration device described in Patent Document 2, the fulcrum portion and the force point portion engage with the strings and engage with the bridge at the action point portion, so that the action point portion is pressed against the bridge with a sufficiently strong force. Will be possible. However, the musical sound reproduced from the stringed instrument does not reach the sound quality of a general HiFi speaker.

As described in Non-Patent Documents 1 and 2, although the acoustic characteristics of old violins including Stradivarius have been studied, a device capable of sounding a stringed instrument with high sound quality has not been realized.

From such a viewpoint, it is an object of the present invention to provide a stringed instrument excitation device and a stringed instrument excitation system capable of sounding a stringed instrument with high sound quality.

In order to solve the above problems, the stringed instrument exciter of the present invention is a stringed instrument exciter that transmits vibration from the vibrating device to the stringed instrument to reverberate the stringed instrument, and is a main body having a mounting surface for the stringed instrument. The board is provided with an engaging portion provided on the mounting surface and engaged with the strings, and a vibrating device connecting surface provided on a surface different from the mounting surface and connecting the vibrating device, and the engaging portion is provided. The portion is configured to engage with the string by using the bending force of the string .
Other means will be described in the form for carrying out the invention.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a stringed instrument exciter and a stringed instrument excitement system capable of sounding a stringed instrument with high sound quality.

It is a perspective view which shows the whole structure of the stringed instrument which attached the stringed instrument exciter which concerns on 1st Embodiment of this invention. It is a perspective view which shows the structure attached to the string of the stringed instrument exciter which concerns on 1st Embodiment. It is a perspective view which shows the example which attached the stringed instrument exciter which concerns on 1st Embodiment to a string on the tail side. It is a figure which shows the structure of the stringed instrument exciter which concerns on 1st Embodiment, (a) is the perspective view seen from the bottom, (b) is the perspective which shows the state which the stringed instrument exciter of (a) is attached to a string. It is a figure. It is a figure explaining the attachment to the string of the stringed instrument exciter which concerns on 1st Embodiment, (a) is the figure which shows the attachment state of the stringed instrument exciter seen from the tail side of the violin, (b) is a figure which shows. The figure which shows the attached state of the stringed instrument exciter seen from the side surface side of the body of a violin, (c) is the figure which shows the attached state seen from the body side of a violin. It is a figure which shows the structure of the stringed instrument exciter of the modification 1, (a) is the perspective view seen from the bottom, (b) is the perspective view which shows the state which the stringed instrument exciter of (a) is attached to a string, (c). ) Is a diagram showing the attached state of the stringed instrument exciter as seen from the tail side of the violin 1. It is a figure which shows the structure of the stringed instrument exciter of the modification 2, (a) is the perspective view seen from the bottom, (b) is the perspective view which shows the state which the stringed instrument exciter of (a) is attached to a string, (c ) Is a diagram showing the attached state of the stringed instrument exciter as seen from the tail side of the violin 1. It is a figure which shows the structure of the stringed instrument exciter of the modification 3, (a) is the perspective view seen from the bottom, (b) is the perspective view which shows the state which the stringed instrument exciter of (a) is attached to a string, (c). ) Is a diagram showing the attached state of the stringed instrument exciter as seen from the tail side of the violin 1. It is an exploded perspective view which shows the structure of the stringed instrument exciter of the modification 4. It is a figure which shows the attachment state of the modification 4, (a) is the figure which shows the attachment state of the stringed instrument exciter seen from the tail side of the violin 1, and (b) is the figure which shows the stringed instrument seen from the side surface side of the body 5 of the violin 1. The figure which shows the attachment state of the exciter, (c) is the figure which shows the attachment state seen from the body 5 side of the violin 1. It is a perspective view which shows the structure of the stringed instrument exciter attached to the string of the modification 5. It is a figure which shows the power spectrum of a general violin as a reference material for explaining a stringed instrument exciter which concerns on this embodiment. It is a figure which shows the power spectrum of an old violin as a reference material for explaining a stringed instrument exciter which concerns on this embodiment. It is a perspective view which shows the structure of the stringed instrument exciter attached to the string of the modification 6. It is a perspective view which shows the structure of the stringed instrument which attached the stringed instrument exciter which concerns on 2nd Embodiment of this invention. It is a figure explaining the attachment to the string of the stringed instrument exciter which concerns on the 2nd Embodiment, (a) is the figure which shows the attachment state of the stringed instrument exciter seen from the tail side of the violin, (b) is a figure which shows. It is a figure which shows the attachment state seen from the body side of a violin. It is a perspective view which shows the structure of the stringed instrument which attached the stringed instrument exciter which concerns on 3rd Embodiment of this invention. It is a figure explaining the attachment to the string of the stringed instrument exciter which concerns on the 3rd Embodiment, (a) is the figure which shows the attachment state of the stringed instrument exciter seen from the tail side of the violin 1, (b) is a figure which shows. It is a figure which shows the attachment state seen from the body 5 side of the violin 1. It is a perspective view which shows the structure of the stringed instrument which attached the stringed instrument exciter which concerns on 4th Embodiment of this invention. It is a figure explaining the attachment to the string of the stringed instrument exciter which concerns on 4th Embodiment, (a) is the perspective view of the stringed instrument exciter of FIG. 19, (b) is a figure of FIG. It is an exploded perspective view. It is a figure which shows the structure of the stringed instrument exciter of the stringed instrument exciter of the modification 7, (a) is the perspective view of the stringed instrument exciter, (b) is the exploded perspective view of the stringed instrument exciter (a). It is a perspective view which shows the structure of the stringed instrument which attached the stringed instrument exciter of the modification 8. It is a perspective view of the stringed instrument exciter of the modification 8, (a) is a perspective view of the stringed instrument exciter of the modification 7, and (b) is an exploded perspective view of the stringed instrument exciter of the modification 7. It is a perspective view which shows the structure of the stringed instrument which attached the stringed instrument exciter which concerns on 5th Embodiment of this invention. It is an exploded perspective view of the stringed instrument exciter which concerns on the said 5th Embodiment. It is an exploded perspective view of the stringed instrument exciter of the modification 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same reference numerals are given to the common parts in each figure, and duplicate description is omitted.
(First Embodiment)
This embodiment can be applied to, for example, a cello or a viola as a stringed instrument, but here, it will be described as an example applied to a violin.
[overall structure]
The stringed instrument exciter 100 and the stringed instrument exciter 100-1 have different string attachment positions and have the same configuration. Hereinafter, the stringed instrument exciter 100 attached to the string on the neck side shown in FIG. 2 will be taken as an example. The enlarged view of the main part of FIGS. 2 and 3 shows the configuration of the stringed instrument exciter 100 attached to the G string (low-pitched string 15 g).

As shown in FIGS. 1 and 2, the stringed instrument excitation system S transmits the vibration from the vibrating device 30 to the violin 1 (stringed instrument), and the violin 1 (stringed instrument) is sounded with high sound quality. A vibrating device 30 that excites 100 is provided. The vibrating device 30 vibrates according to the sound signal output from the sound source device 50. The sound source device 50 is a sound source that reproduces a sound signal, and the output sound signal is input to the vibration device 30.
The stringed instrument exciter 100 transmits the acoustic vibration of the vibrating device 30 to the violin 1 to reverberate the violin 1.

The violin 1 is common. It can also be applied to stringed instruments other than the violin (for example, cello and viola).
The violin 1 has a body 5 composed of a front plate 2, a back plate 3 and a side plate 4, a fingerboard 6 extending from the top of the front plate 2 to the head side (tail side), a head side top of the body 5, and a back surface of the fingerboard 6. A neck 7 fixed to the neck 7 and the like. The head 8 of the neck 7 forms a spiral 9 and comprises a bobbin (peg) 10. A tail piece 11 is fixed to the tail side of the front plate 2, and an adjuster 12 is attached to the tail piece 11. A pair of f-holes 13 that open inside the body 5 are formed on the front plate 2. The body 5 constitutes a Helmholtz resonator.

The bus bar (not shown) on the back surface of the front plate 2 has a role of reinforcing the front plate 2 and strengthening and stabilizing the bass sound. A cylinder called a sound post (not shown) is erected in the body 5, and the vibration that reaches the front plate 2 through the bridge 20 is transmitted to the back plate 3.
When viewed from the front, the string 15 has a bass string on the left and a treble string on the right, and is an E string, an A string, a D string, and a G string in order from the treble string. The four strings 15e, 15a, 15d, 15g (see FIG. 2) pass over the piece 20 from the tail piece 11 fixed to the body 5, and are hooked on the upper piece (nut) 16 at the tip of the fingerboard 6. It is wound around the thread winding 10 at the tip of the end.

<piece 20>
The piece 20 installed on the front plate 2 (see FIG. 1) of the violin 1 will be described.
As shown in FIG. 2, the piece 20 has an upper surface portion 20a that supports the chord 15 and a chord groove 20b formed on the upper surface portion 20a at predetermined intervals. The upper surface portion 20a is formed of a gently curved surface that is convex upward. The piece 20 supports the four strings 15e, 15a, 15d, 15g at predetermined positions by the string groove 20b, and transmits the vibration of the strings 15e, 15a, 15d, 15g to the front plate 2 (see FIG. 2). The piece 20 is installed on the front plate 2 between the fingerboard 6 and the tail piece 11 (see FIG. 1) so as to be substantially perpendicular to the front plate 2, and is removable.

The height of the piece 20 is not symmetrical, but is changed between the G string (low-pitched string 15 g) side and the E string (high-pitched string 15e) side. By making the height asymmetrical, the four strings 15e, 15a, 15d, and 15g are in easy-to-handle positions with a bowing posture.

The piece 20 has a spiral-shaped opening 20f that opens in the thickness direction at the center thereof, and further below the opening 20f, there is an opening 20g (circular cuts on the left and right sides of the piece) in which one end of the spiral shape communicates with the side end face. It is formed in two places on the left and right. The piece 20 includes two foot portions 20h, a circular recessed portion 20i formed between the foot portion 20h and the side end surface of the opening portion 20g, and a flat bottom portion 20j between the foot portion 20h and the foot portion 20h. Have.

Further, in the piece 20, the thickness of the piece 20 is gradually changed so that the thickness of the foot portion 20h is larger than the thickness of the upper surface portion 20a. Further, one surface of the piece 20 is a flat surface, and the other surface facing the piece 20 is formed in a convex shape.
As an example, maple material is used for the piece 20. Maple is dense enough to transmit sound effectively, and the wood fibers are regularly packed.

<Sound source device 50>
The sound source device 50 is a sound source that reproduces a sound signal. The sound source device 50 may be any electronic device as long as it outputs a sound signal to the vibration device 30. The sound source device 50 outputs the sound of a stringed instrument such as a violin as a sound source. When the sound of a stringed instrument is output as a sound source, it is possible to reproduce a musical sound with a high degree of reality, which is close to the actual performance.

The sound source device 50 includes a CPU 51, a memory 52, an input circuit 53, and an output circuit 54.
The CPU 51 reads the string vibration sound program 52a stored in the EEPROM (Electrically Erasable Programmable Read-Only Memory), which is a ROM or an electrically rewritable non-volatile memory, and expands the string vibration sound program 52a into a RAM to control the string vibration. .. The CPU 51 outputs a control signal for controlling each unit via the output circuit 54 based on the input signal input via the input circuit 53.

The memory 52 is composed of a ROM, a RAM, an EEPROM or the like containing programs for various processes. The memory 52 includes an external storage device such as a hard disk drive (HDD). The memory 52 stores a control program including the string vibrato program 52a.

An input signal from an input device 55 such as a keyboard or a mouse is input to the input circuit 53.
The output circuit 54 outputs a signal for outputting a sound signal output result or the like (for example, a display signal for displaying on the display unit 56). Further, the output circuit 54 may have a driver for driving the vibration device 30, and in this case, it is also possible to directly output the sound signal of the sound source device 50 to the vibration device 30.

<Phase inversion circuit 60>
Amplification function The phase inversion circuit 60 amplifies the sound signal output from the sound source device 50 into the sound signal that drives the speaker 20.
-Phase inversion function The phase inversion circuit 60 inverts a signal having one polarity among the sound signals output from the sound source device 50 and outputs the signal to the vibrating device 30A or the vibrating device 30B (see FIG. 19 and the like below).
-Process circuit function According to the experiment of the present inventor, it has been found that there is no big difference in the characteristics of each string excitation in acoustic measurement. However, in actual performance, each string has a scale. Therefore, the phase inversion circuit 60 has a process circuit function. The process circuit function equalizes the sound signal for each string according to the scale of each string. The process circuit function adjusts the characteristics of the simultaneous vibration of two or more strings. In addition to equalization, the process circuit function also performs processing to invert the left and right polarities.

<Vibration device 30>
The vibrating device 30 is output from the sound source device 50 and vibrates by the sound signal amplified by the phase inversion circuit 60.
The vibrating device 30 uses a small speaker (see FIGS. 1 to 23). The vibrating device 30 uses a super-magnetostrictive speaker (see FIGS. 24 to 26).
・ Small speaker (see FIGS. 1 to 23)
Generally, a speaker includes a voice coil that vibrates an electric signal in the front-rear direction and a diaphragm directly connected to the voice coil (both are not shown), and the diaphragm vibrates to have a waveform equal to that of a sound signal. Sound is radiated into the air. The vibrating device connecting surface 130 (see FIG. 2) of the main body substrate 110 is directly attached to the circular cone paper which is the diaphragm of the vibrating device 30 with an adhesive. As a result, the vibration of the diaphragm (cone paper) of the vibration device 30 is directly transmitted to the main body substrate 110 via the connection portion 210.

Recently, a piezo thin film speaker in which hundreds to 1,000 elements are arranged on a thin film by IC technology has been put into practical use. The piezo thin-film speaker has been improved in performance, such as enabling low-frequency reproduction, which was difficult in bulk. Since the piezo thin film speaker is in the form of a film of, for example, 20 mm × 30 mm, it can be directly adhered to the vibrating device connecting surface 130 of the main body substrate 110.

• Magnetostrictive speaker (see FIGS. 25 and 26)
The giant magnetostrictive speaker is a flat panel speaker using an oscillator made of a giant magnetostrictive material. The oscillator of the giant magnetostrictive material has a structure in which a coil is wound around a columnar magnetostrictive element. When a sound current flows through the coil, the giant magnetostrictive element expands and contracts, and the force causes the thick acrylic plate to vibrate to produce sound. Reproduce. An application example of the giant magnetostrictive speaker will be described later using the double-sided vibration speaker 45 (see FIGS. 24 to 26).

In the present embodiment, the vibrating device 30 is attached to the vibrating device connecting surface 130 (see FIG. 2) of the main body board 110 via the connecting portion 31, but the vibrating device 30 is directly attached to the vibrating device connecting surface 130. It may be attached.
Further, since the main body of the vibrating device 30 is lightweight, it is not necessary to particularly install a support member (not shown) that supports the main body of the vibrating device 30.

The example in which the stringed instrument exciter 100 is attached to the string on the neck side has been described above, but as shown in FIG. 3, the stringed instrument exciter 100-1 may be attached to the string on the tail side. In addition, each embodiment and modification to be described later will describe the example attached to the string on the neck side.

[Structure of stringed instrument exciter]
As shown in FIG. 2, the stringed instrument exciter 100 is attached to the string 15 (here, the G string 15 g) close to the piece 20. As will be described later, the stringed instrument exciter 100 may be attached to any of the four strings 15e, 15a, 15d, and 15g of the violin 1. However, attachment to the G string (string 15g) or E string (15e) has the advantage that it is easy to attach to the string 15 because it is attached from the outside. Further, the difference in acoustic effect when attached to each string 15e, 15a, 15d, 15g will be described later.

As shown in FIG. 4, the stringed instrument exciter 100 is provided on the main body board 110 having the mounting surface 110a to the string 15 and the mounting surface 110a of the main body board 110, and is engaged with the string 15 by using the bending force of the string 15. It includes a mating engaging portion 120 and a vibrating device connecting surface 130 provided on a surface different from the mounting surface 110a (a surface orthogonal to the mounting surface 110a) and connecting the vibrating device 30.

In the present embodiment, the connecting portion 31 is further attached to the vibrating device connecting surface 130 (connecting portion). The connection portion 31 is not an essential component of the stringed instrument exciter 100 and can be omitted. The connection portion 31 may be attached to the vibrating device 30 side instead of the main body board 110. Further, although the connecting portion 31 has a cylindrical shape, it may have a prismatic shape.

<Main board 110>
In the present embodiment, the main body substrate 110 is a rectangular cuboid member having long sides in the direction in which the strings 15 extend. The main body substrate 110 is, for example, a square bar having a cross section of 10 mm × 10 mm and a length of 15 mm.
If the shape of the main body substrate 110 is made into a rectangular cuboid shape, processing is easy and no waste is generated in the material. Further, if the rectangular cuboid shape is adopted, it is easy to form the mounting surface 110a and the vibrating device connecting surface 130 on the rectangular cuboid surface. That is, the vibration device connecting surface 130 tries to transmit the vibration of sound to the string 15 from the lateral direction. On the other hand, it is preferable that the engaging portion 120 formed on the mounting surface 110a is not in the vibration direction of the string 15 in order to prevent the string 15 from falling off. Therefore, by arranging the mounting surface 110a and the vibrating device connecting surface 130 at right angles, the main body substrate 110 can be permanently and stably mounted on the string 15 while transmitting the vibration of sound best.

The main body substrate 110 is preferably made of a material that easily transmits vibration, for example, the same material as the material of the piece 20 (for example, a maple material). The main body substrate 110 may be made of other wood, resin, or the like as long as it is a material that easily transmits vibration (a material that is lightweight and has an appropriate density and rigidity).

<engaging part 120>
The engaging portion 120 has a function of engaging with the string 15 and accurately and efficiently transmitting the vibration transmitted to the engaging portion 120 to the string 15.
The engaging portion 120 engages with the string 15 by utilizing the bending force of the string 15. Here, the bending force of the string 15 means a restoring force that tries to return to the original state when the string 15 is locally bent or deformed.

The engaging portion 120 is a gently curved groove grooved in the depth direction from the mounting surface 110a. In the present embodiment, the S-shaped string mounting groove is grooved in the depth direction from the mounting surface 110a as a gently curved groove.

As described above, when the main body substrate 110 is, for example, a square bar having a cross section of 10 mm × 10 mm and a length of 15 mm, the upper surface (mounting surface 110a) of the main body substrate 110 has a width of chord diameter and a depth. A groove having a diameter of 5 mm and a length of 15 mm is dug while meandering in a gentle curved shape (in this embodiment, an S-shaped chord mounting groove is grooved).

The engaging portion 120 is required to have a function of being easily attached to and detached from the string 15 and stably held by the string 15.
The thickness of the strings of the violin 1 used by the present inventor in the experiment is G string: 0.79 mm, D string: 0.72 mm, A string: 0.66 mm, and E string: 0.29 mm. In the present embodiment, the engaging portion 120 is an S-shaped string mounting groove. In the case of the engaging portion 120 having a groove, if the groove width is slightly narrow, the string 15 cannot be inserted, and if the groove width is wide, the contact becomes loose or chattering occurs.

The engaging portion (S-shaped string mounting groove) 120 has an S-shaped amplitude width (PP value) of about 2 mm, and the groove width of the S-shaped groove is slightly wider than the thickness of the string. It is designed to handle variations in string thickness. When the engaging portion 120 is pushed into the string 15, the string 15 bends along the S-shape, and as a result, the string 15 is crimped to both inner surfaces of the groove by a bending force, and the string 15 and the engaging portion 120 are stably coupled. To.

The "deflection force of the strings" will be described. The string 15 is made of catgut (sheep gut), nylon, steel or the like. By stretching (pulling from both ends) the string 15, tension is generated in the string 15, and the string 15 bends against an external force to push back the force. When the engaging portion 120 is inserted into the groove against the bending force of the string 15, a strong pressing force acts from the string 15 to the side surface of the groove, and the engaging portion 120 is strongly engaged with the string 15. be able to.

Hereinafter, the engaging portion (S-shaped string mounting groove) 120 will be specifically described.
-Groove depth The engaging portion 120 is an S-shaped string mounting groove grooved in the depth direction (inside direction of the main body substrate 110) from the mounting surface 110a. The depth of this groove is grooved to a depth just beside the string 15. In the present embodiment, the engaging portion 120 is grooved to approximately half the height of the main body substrate 110. As shown in FIG. 2, when the stringed instrument exciter 100 is attached to the string 15, the string 15 fits into the bottom of the engaging portion 120. When the mounting is completed, in the stringed instrument exciter 100, the central portion of the vibrating device connecting surface 130 is located right beside the string 15.

Vibration from the vibrating device 30 is applied in a direction orthogonal to both ends of the groove of the engaging portion (S-shaped string mounting groove) 120. In this case, it is preferable that the vibration from the vibrating device 30 is located right beside the string 15.

Groove length The engaging portion (S-shaped string mounting groove) 120 is formed over the entire length of the rectangular cuboid body substrate 110 in the long direction. As shown in FIGS. 2 and 4B, by making the engaging portion 120 an appropriate length, the stringed instrument exciter 100 does not shift with respect to the string 15 in the axial direction and the circumferential direction of the string 15. , Can be installed reliably and stably. Further, by making the shape of the groove S-shaped, the stringed instrument exciter 100 can be sufficiently stably attached to the string 15 even with a shorter length.

Further, the present inventor changes the bending force of the string 15 and changes the engaging force (crimping force) by selecting the amplitude width of the S-shaped curve, that is, the length of the S-shaped string attachment groove. I found that I could do it. For example, the engaging portion (S-shaped string mounting groove) 120 is suitable for high-quality reproduction when the total length of the S-shaped groove is 15 mm and the amplitude width of the S-shaped groove is about 2 mm. It was confirmed that the crimping force was obtained.

-Width of groove In the engaging portion (S-shaped string mounting groove) 120, a groove corresponding to the width of the chord diameter is dug.
The engaging portion 120 engages with the strings 15 sandwiched between the walls at both ends of the groove from the left-right direction. Therefore, the groove width corresponds to the thickness of the string 15. For example, when attached to the G string (string 15 g), the groove width of the engaging portion 120 is a wide groove width corresponding to the thick G string (string 15 g). Further, in order to prevent the mounted stringed instrument exciter 100 from shifting, the groove width of the engaging portion 120 is set to be about the same as the thickness of the string 15, and the string 15 is pushed into the engaging portion 120 at the time of mounting.
If the material of the main body substrate 110 is wood such as maple material, by setting the groove width to be about the same as the thickness of the string 15, the engaging portion 120 can be pushed to the bottom while being slightly deformed. After that, the slightly deformed groove returns to its original position, so that the string 15 mounted on the bottom is engaged at that position.

On the other hand, if the material of the main body substrate 110 is a resin that is not easily deformed, the string 15 can be pushed into the engaging portion 120 by making the groove width slightly larger than the thickness of the string 15. However, since the rigid members of the side wall of the engaging portion 120 and the string 15 are in contact with each other, the string 15 slips in the engaging portion 120, and the stringed instrument exciter 100 is displaced in the axial direction and the circumferential direction of the string 15. there is a possibility. As a countermeasure, (1) devise the shape of the groove to make the side surface of the string 15 S-shaped or wedge-shaped so that it abuts at one or two points from both sides, and (2) install a non-slip member inside the engaging portion 120. Examples thereof include (3) making the material of the main body substrate 110 a soft resin that is easily deformed at least on the engaging portion 120 side. In the above (2) and (3), the structure becomes complicated and there is a concern that the cost will increase. It may also adversely affect sound transmission. Further, regarding (3) above, if the entire material of the main body substrate 110 is made of soft resin, the structure is simplified, but the transmission of sound may be suppressed.

-Shape of the groove The S-shaped string mounting groove has a convex portion and a concave portion, and an S-shaped curve is formed so that the contact state between the string 15 and both side surfaces of the groove is symmetrical. When the curve of the groove is only the convex portion and only the concave portion, the chord 15 strongly hits the convex wall surface, so that the adhesion between both ends of the groove becomes unbalanced. By forming the S-shaped string mounting groove, the contact state between the string 15 and both side surfaces of the groove can be made symmetrical.

As shown in FIGS. 4A and 4B, the engaging portion 120 is an S-shaped groove when viewed from the mounting surface 110a. By making the shape of the groove S-shaped, as shown in FIG. 4 (b), the string 15 has two points, one of the convex wall of the engaging portion 120 and the other of the convex wall of the engaging portion 120. While applying a bending force between the two convex portions, they are strongly abutted and fixed. As a result, the stringed instrument exciter 100 can be stably attached to the string 15. Further, even if the width of the groove is wider than the thickness of the string 15, the string 15 does not disengage from the engaging portion 120, so that high processing accuracy for matching the width of the groove with the thickness of the string 15 is unnecessary, and the cost is high. It can be reduced. Since the width of the groove can be made wider than the thickness of the string 15, it is possible to realize a device in which the stringed instrument exciter 100 can be easily attached / detached to the string 15. Further, since the string 15 does not disengage from the engaging portion 120, the material of the main body substrate 110 can be simply configured by using a resin that is not easily deformed. Further, even if a soft member such as wood is used as the material of the main body substrate 110, deterioration due to aged use such as a large groove can be prevented.

In the present embodiment, the shape of the groove of the engaging portion 120 is S-shaped in a plan view, but other uneven shapes (for example, a bell-shaped shape having one convex portion, a wavy shape, a wedge-shaped shape such as a V-shape). But it may be. However, since the S-shaped engaging portion 120 used in the present embodiment has a simple structure, no corners, and has symmetry in the front-rear direction, it has an advantage that it is easy to attach and does not depend on the string 15 to be attached.

<Vibrator connection surface 130>
The vibrating device connecting surface 130 is a flat surface formed on the side surface of the main body substrate 110 to which the vibrating device 30 is attached. As shown in FIGS. 2 and 4B, the vibrating device connecting surface 130 is a main body substrate in a lateral direction with respect to the string 15 (a direction orthogonal to the string 15 stretched on the front plate 2 of the violin 1). It is formed on the side surface of 110. Since the main body substrate 110 is a rectangular cuboid member, the side surface in the lateral direction with respect to the chord 15 has two sides, a back side and a front side, but either side may be used.
The vibrating device connecting surface 130 connects the vibrating device 30, and transmits the vibration (sound vibration) of the diaphragm of the vibrating device 30 to the string 15 sandwiched between the engaging portions 120 via the main body substrate 110.

In the present embodiment, the connection portion 31 is further attached to the vibration device connection surface 130 (connection portion), and the vibration device 30 is attached via the connection portion 31. The vibrating device 30 may be directly attached to the vibrating device connecting surface 130 without installing the connecting portion 31. Further, the connecting portion 31 may be attached to the vibrating device 30 side instead of the vibrating device connecting surface 130 of the main body board 110. Further, although the connecting portion 31 has a cylindrical shape, it may have a prismatic shape.

The violin 1 (stringed instrument) to which the stringed instrument exciter 100 is attached can be used not only when it is placed on a horizontal surface as shown in FIG. be. Even in such a usage method, by engaging the string 15 of the violin 1 with the engaging portion 120 of the stringed instrument exciter 100, it is possible to reliably prevent the main body substrate 110 from falling off or shifting. .. Further, even when the stringed instrument exciter 100 is used for a long time or is attached for a long time, the engaging portion 120 can effectively prevent the main body substrate 110 from being displaced.

Hereinafter, the operation and effect of the stringed instrument exciter 100 configured as described above will be described.
<At the time of installation>
In the stringed instrument exciter 100 shown in FIG. 1, one groove end portion of the engaging portion 120 provided on the mounting surface 110a of the main body substrate 110 is applied to the string 15 stretched on the violin 1, and the main body substrate 110 is directly moved upward. Push it into the string 15 over the entire length of the engaging portion 120. Since the engaging portion 120 is formed to be wider than the thickness of the string 15 to be mounted, it is easy to mount.

The main board 110 is slanted and the chord 15 is inserted from one side of the S-shaped groove, and the chord 15 is bent and inserted into the S-shaped groove. Since the engaging portion 120 is an S-shaped groove, the string 15 is gradually pushed from one side along the groove of the S-shaped curved surface with respect to the string 15 so that the string 15 is along the S-shaped groove. It is attached by deforming the string 15 using a bending force (a force that tries to return to the original state when the string is bent). Finally, the main body board 110 can be pushed to the position shown in FIG. 5, and the installation is completed.

After mounting, the string 15 strongly abuts on the two convex portions of the S-shaped groove (groove in the engaging portion 120), so that the stringed instrument exciter 100 utilizes the bending force of the string 15 to the string 15. Engaged and fixed. Further, since the string 15 is in contact with the entire length of the bottom of the engaging portion 120, the stringed instrument exciter 100 is stably installed on the string 15.

As shown in FIG. 5B, when the stringed instrument exciter 100 is attached to the string 15, the vibrating device connecting surface 130 is positioned directly beside the string 15, and the sound is heard from the side with respect to the string 15. Can transmit the vibration of.

<After installation>
As shown in FIGS. 2 and 3, the stringed instrument exciter 100 is attached to the G string (string 15 g) close to the piece 20. In the stringed instrument exciter 100, the vibrating device 30 is attached to the vibrating device connecting surface 130 via the connecting portion 31. As shown in FIG. 1, the sound signal from the sound source device 50 is amplified and supplied to the vibration device 30 by the phase inversion circuit 60. In the first embodiment, the phase inversion circuit 60 performs only amplification without phase inversion of the signal.

The stringed instrument exciter 100 transmits the vibration (sound vibration) of the diaphragm of the vibrating device 30 to the string 15 sandwiched between the engaging portions 120 via the main body substrate 110.

The stringed instrument exciter 100 is attached to one string in the vicinity of the piece 20 and excites one string. The stringed instrument exciter 100 excites each string independently. In the stringed instrument exciter 100, by attaching to one string 15 and vibrating it, the vibration of the string 15 reverberates the front plate 2 of the violin 1 and the main body of the violin 1 via the bridge 20. Even if the stringed instrument exciter 100 is attached to any one of the four strings, the main body of the violin 1 can be sounded satisfactorily. The vibration to one string 15 vibrates the other three strings 15 via the bridge 20, but the vibration transmission to the other three strings 15 is slight.

Further, the stringed instrument exciter 100 is stably held after being attached to the string 15 due to the excellent structure of the S-shaped groove engaging portion 120. The stringed instrument exciter 100 did not shift or come off even if vibration was applied by raising or lying down the violin 1, lowering the string 15, or further carrying it.

[Modification example]
<Modification example 1>
As shown in FIGS. 6A to 6C, the stringed instrument exciter 100A of the first modification is provided with a taper 125 at the opening of the engaging portion 120A.

The stringed instrument exciter 100A has an advantage that even the S-shaped engaging portion 120A can be easily attached to the string 15 stretched linearly by the taper 125. Further, once the stringed instrument exciter 100A is attached to the string 15, the stringed instrument exciter 100A is stably installed on the string 15 as in the stringed instrument exciter 100 shown in FIGS. 2 to 5.

Here, if the groove width (PP value) of the S-shape is large, the force to return to the original position when bending the string 15 also increases, and the main body substrate 110 is stably held by the string 15, but is smooth to the groove. Insertion becomes difficult.
The stringed instrument exciter 100A is provided with a taper 125, so that the main body substrate 110 is aligned with the string 15 and pushed in from above, and the string 15 is naturally restricted to the S-shaped groove and pushed in. Therefore, the stringed instrument exciter 100A can have a larger S-shaped amplitude than the stringed instrument exciter 100. As a result, the resistance when the pushed main body board 110 is slid parallel to the string 15 is large, and the resistance for pulling out the main body board 110 from the string 15 is also large. The main body substrate 110 after the string is inserted is stably held by the string 15 and does not shift or come off from the string 15 even by vibration due to excitation.

<Modification 2>
As shown in FIGS. 7A to 7C, the stringed instrument exciter 100B of the second modification forms a groove so that the cross-sectional shape in the direction orthogonal to the groove widens from the groove bottom toward the groove opening. The engaging portion 120B is provided. Further, a taper 125 is provided at the opening of the engaging portion 120B. Further, a spring plate 126 is attached to the surface of the main body board 110 facing the vibrating device connecting surface 130. The spring plate 126 applies a spring bending force in a direction that narrows the groove width of the groove opening.

The stringed instrument exciter 100B is easily guided to the groove opening by the taper 125 when attached to the string 15. After that, the main body board 110 can be attached to a predetermined position by pushing it in the depth direction with respect to the string 15.
Here, since the spring plate 126 is attached to the surface of the main body board 110 facing the vibrating device connecting surface 130, the string 15 is inserted while being constantly lightly pressed by the bending force of the spring plate 126. Become. Therefore, by repeatedly inserting and removing the S-shaped engaging portion 120B, more stable engagement can be ensured even if the groove is worn.

As a result, the user can attach the stringed instrument exciter 100B without considering the force adjustment, and the convenience can be improved. Further, once the stringed instrument exciter 100B is attached to the string 15, the stringed instrument exciter 100B shown in FIGS. 2 to 5 and the stringed instrument exciter 100A shown in FIGS. 6 are stably installed on the string 15. .. Further, even if the groove is worn due to the bending force of the spring plate 126, more stable engagement can be ensured for a long time.

<Modification 3>
As shown in FIGS. 8A to 8C, the stringed instrument exciter 100C of the modified example 3 has a straight groove and a cross-sectional shape in a direction orthogonal to the groove has a groove width from the groove bottom toward the groove opening. An engaging portion 120C having a widening groove is provided. Further, a taper 125 is provided at the opening of the engaging portion 120C. The groove width on the groove bottom side here is formed so as to be slightly smaller than the diameter of the chord 15, and is formed so that the chord 15 can be engaged with the groove width on the groove bottom side. Further, even if the groove is worn due to the bending force of the spring plate 126, more stable engagement can be ensured for a long time.

When the stringed instrument exciter 100C is attached to the string 15, the engaging portion 120C guides the stringed instrument exciter 100C to a predetermined position in the depth direction. Further, since the groove width of the engaging portion 120C narrows inward toward the groove bottom, when the string 15 reaches a predetermined position, the engaging portion 120C is mounted with a strong force even if it does not have an S-shape. can do. As a result, the user can attach the stringed instrument exciter 100C without considering the force adjustment, and the convenience can be improved. Further, since the opening of the engaging portion 120C has a linear shape, there is an advantage that it can be easily attached to the string 15.

<Modification example 4>
As shown in FIGS. 9 and 10 (a) to 10 (c), the stringed instrument exciter 100D of the modified example 4 connects the outer periphery of the main body board 110 on the vibrating device connecting surface 130 side and the vibrating device 30 of the connecting portion 31. A vibration damping member 190 that covers the outer periphery of the connecting portion 31 except for the position is provided. The vibration damping member 190 is a rubber elastic member such as silicon rubber. As shown in FIG. 9B, the vibration damping member 190 is mounted so as to cover the outer periphery of the main body substrate 110 and the outer periphery of the connection portion 31 at the time of assembling / joining the main body substrate 110 and the vibration device 30. The vibration damping member 190 forms a connection engagement surface having a rectangular plan view and a round hole penetrating in the center so as to face the vibration device connection surface 130 and abut on the connection surface excluding the connection portion 31. is doing.

According to the stringed instrument exciter 100D of the modified example 4, the sound feeling could be improved, although the reason is not clear. It is presumed that by attaching the vibration damping member 190, unnecessary vibration is suppressed and only the effective sound component is transmitted.

<Modification 5>
As shown in FIG. 11, the stringed instrument exciter 100 is attached to the neck side string, and the stringed instrument exciter 100-1 is attached to the tail side string. The stringed instrument exciter 100 and the stringed instrument exciter 100-1 have the same configuration.

By vibrating the particularly strong (thick) G string among the 1st strings with the two stringed instrument exciters 100 and 100-1, more sufficient vibration can be given, and the characteristics of bass (200Hz ~) can be improved. Can be improved.

12 and 13 are diagrams showing the power spectrum of the violin as a reference material for explaining the stringed instrument exciter according to the present embodiment. FIG. 12 shows the direct output of a typical violin D (15d) open string playing string, and FIG. 13 shows the direct output of an old violin D (15d) open string playing string. A detector was installed under the piece 20 to measure and analyze the sound pressure level [dB] in the frequency band [Hz]. Comparing the width of the power spectrum of a general violin (see reference numeral a in FIG. 12) with the width of the old violin (see reference numeral b in FIG. 13), the width of the old violin is narrower. However, the comparison between the two cannot be fully expressed by such a power spectrum, and is only a guideline. The stringed instrument exciter 100 to 100D of this embodiment is an example applied to the violin shown in FIG. Rather, it is characterized by being able to obtain the following effects by applying it to a general-purpose violin.

In any of the above <Modification 1> to <Modification 4>, the stringed instrument exciter 100A to 100D may be attached to the strings on the neck side or the tail side, and further, as in the above <Modification 5>. , May be attached to both the neck and tail strings.

[effect]
As described above, the stringed instrument exciter 100 to 100D of the present embodiment is provided on the main body substrate 110 having the attachment surface 110a of the violin 1 to the string 15 and the attachment surface 110a, and uses the bending force of the string 15. It includes an engaging portion 120 that engages with the string 15 and a vibrating device connecting surface 130 that is provided on a surface different from the mounting surface 110a and connects the vibrating device 30.

With this configuration, the string 15 is evenly adhered to both side surfaces of the groove of the engaging portion (120A to 120C) 120, and is vibrated from the vibrating device 30 in the direction orthogonal to both side surfaces of the groove to engage with the string 15. The unit 120 vibrates as a unit without slipping. The acoustic vibration from the vibrating device 30 can be satisfactorily transmitted to the piece 20 in the vicinity of the string 15 of the violin 1, and the violin 1 can be sounded with high sound quality. The reproduction characteristics of the stringed instrument exciter 100 to 100D were excellent in both frequency characteristics and distortion characteristics, and it was possible to hear high-quality and stable reproduced sound.

Further, since the stringed instrument exciter 100 to 100D of the present embodiment includes the engaging portion 120 for one string, the entire device has a compact shape, so that the string is connected to the vibrating device connecting surface 130 at the vibration point by the vibrating device 30. The distance to 15 can be shortened (about 2 mm), which can contribute to the improvement of sound quality.

In particular, the stringed instrument exciter 100 to 100D vibrates the acoustic vibration from the vibrating device 30 as a unit without the string 15 and the engaging portion 120 slipping. Since the string 15 itself is acoustically vibrated, the bowing by the performer and the acoustic vibration from the vibrating device 30 are physically the same phenomenon. That is, the string 15 is only different in whether it is vibrated by the bow of the performer or by the stringed instrument exciter 100 to 100D, and the string 15 itself does not vibrate only by different vibration sources. It is the same. There is no distinction between the bowing of the performer or the vibration of the stringed instrument exciter 100 to 100D in the behavior after the string 15 vibrates, and the vibration is transmitted to the bridge 20. Therefore, the vibration of the string 15 by the stringed instrument exciter 100 to 100D becomes the original reverberation of the violin 1, and a natural sound can be obtained.

The stringed instrument exciter 100 has an unprecedented feature of vibrating the string 15 which is the entrance of sound. Therefore, the stringed instrument exciter 100 can reproduce a high-quality musical sound with a sense of realism, similar to the live performance of the violin 1.

Here, in the stringed instrument exciter 100 to 100D, by attaching to one string 15 and vibrating it, the vibration of the string 15 reverberates through the piece 20 to the front plate 2 of the violin 1 and the main body of the violin 1. Let me. With the stringed instrument exciter 100 to 100D, it is possible to sound a stringed instrument with high sound quality without bowing.

The stringed instrument exciter 100 to 100D directly vibrates the string 15 itself, and since there is no other intervening acoustic element (for example, a rubber material made of a material that attenuates the vibration), it is possible to produce a clear tone as the original sound. can. In addition, the mute effect can be significantly reduced, the followability of sound vibration transmission (frequency characteristics of each component of vibration) can be improved, and the vibration of sound can be stably and sufficiently transmitted.

According to the results of the audition experiment of the violin reproduction sound, a well-balanced sound can be obtained from the bass to the midrange, and from the midrange to the treble, and the rich and beautiful sound peculiar to the violin can be reproduced, which is inferior to the live violin performance. I was able to realize an excellent sense of presence.

Further, since the stringed instrument exciter 100 to 100D has a simple structure in the shape of a square bar, it can be implemented at low cost. Further, it is easy to integrally form the resin member, and in this case, the material cost can be significantly reduced. For the same reason, the assembly man-hours can be significantly reduced (practically no assembly is required), and the trouble of adjusting each part can be eliminated. In addition, mass production is possible, and cost reduction can be achieved from this point as well.

[Supplementary explanation of pre-equalizer for string vibration]
The pre-equalizer for string vibration will be described.
The pre-equalizer for string vibration is installed in the phase inversion circuit 60 of FIG. 1 in this embodiment.
In the string excitation in the stringed instrument exciter 100 to 100D, it is possible to individually excite each of the four strings of the violin. The result of vibrating each string individually with a sweep signal for frequency characteristics and measuring the reproduced sound shows that the difference between the G, D, A, and E strings is small and covers almost 200 Hz to 20 kHz. As a result of vibrating the four strings individually and measuring the reproduced sound, it can be seen that the transmission characteristics of each string are very similar and cover 200 Hz to 20 KHz.

On the other hand, the frequency range of each string used as a musical instrument is assumed to be the range of the scale (scale starting from the open string) played by the G, D, A, and E strings. The frequency (characteristic frequency) determination of each string as seen from the scale performance example is as follows.
G string; 200Hz to 6kHz
D string; 300Hz to 12kHz
A string; 400Hz to 15kHz
E string; 650Hz to 18kHz
As described above, according to the purpose of enjoying the reproduced music close to the live performance of the violin by the stringed instrument exciter 100 to 100D of the present embodiment, the signal for vibrating each string is in the frequency range in which each string is vibrated at the time of performance. It is preferable to limit it.
In summary, the combinations in which the pre-equalizer for string vibration excites each string are as follows.

<1st string vibration> (see FIGS. 1 to 11)
G string; 200Hz-6kHz
D string; 300Hz-12kHz
A string; 400Hz to 15kHz
E string; 650Hz-18kHz

<Simultaneous vibration of 2 strings> (See FIGS. 15, 16, 19 to 26)
2nd string scale reproduction lowest to highest G + D strings; 200Hz-12kHz
A + E strings; 400Hz-18kHz
D + A string; 300Hz to 15kHz
G + A, G + E, and D + E strings are not set.

<Simultaneous vibration of 4 strings> (see FIGS. 17 and 18)
4th string scale reproduction lowest to highest; 200Hz-18kHz

<Modification 6>
As shown in FIG. 14, stringed instrument exciters 100, 100-1, 100-2, 100-3 are attached to the G, D, A, and E strings, respectively. The stringed instrument exciter 100, 100-1, 100-2, 100-3 is a one-string exciter. Adjacent stringed instrument exciters 100, 100-1, 100-2, 100-3 are arranged so as not to come into contact with each other and excite the four strings independently. The stringed instrument exciter 100, 100-1, 100-2, 100-3 have the same configuration. Instead of the stringed instrument stimulating device 100, the stringed instrument stimulating device 100A shown in FIG. 6, the stringed instrument stimulating device 100B shown in FIG. 7, the stringed instrument stimulating device 100C shown in FIG. 8, and the stringed instrument stimulating device 100D shown in FIG. 9 may be used. .. Further, a part or all of the stringed instrument exciter 100, 100-1, 100-2, 100-3 may be attached to the tail side.

The stringed instrument exciter 100, 100-1, 100-2, 100-3 excites the 4th string independently by the 1st string excitation.
The vibration of the string 15 reverberates the main body of the violin 1 through the piece 20. Even if the stringed instrument exciter 100, 100-1, 100-2, 100-3 is attached to any one of the four strings 15, the violin 1 can be struck well. The inventor has also found the best frequency for excitation for each string. For example, the stringed instrument exciter 100 attached to the G string is excited at 200 Hz to 6 kHz from the string-excited pre-equalizer, and the stringed instrument exciter 100-1 attached to the D string is the string-excited pre-equalizer. It is excited at 400Hz to 12kHz. The stringed instrument exciter 100-2 attached to the A string is excited at 400 Hz to 15 kHz from the string-excited pre-equalizer, and the stringed instrument exciter 100-3 attached to the E string is the string-excited pre-equalizer. It is excited at 650 Hz to 18 kHz.

The stringed instrument exciter 100, 100-1, 100-2, 100-3 of the modification 6 is independently driven for each string, and many parameters can be set. For example, if it is possible to determine which string is being played from the musical tone signal of a CD or record, it is possible to sort the oscillating strings based on the information of each string. This makes it possible to further improve the sound quality.

[Characteristics of each string and supplementary explanation of the main string instrument exciter]
The characteristics of each string and the main string instrument exciter 100-100D, 100-1, 100-2, 100-3 will be supplementarily described.
The violin string, which is the target of string excitation (excitation), is an important component of the musical instrument violin. Unlike ordinary strings or strings, when applying a main string instrument exciter, pay attention to the following characteristics of the violin string.
The materials of violin strings currently used are roughly divided into steel and nylon. In addition, there are many types, such as those with silver, aluminum, and titanium wires wrapped around steel and nylon as cores, so that they can be selected according to the bowing feel during performance and the taste of reproduced sound quality.

The thickness of a typical violin string and the tension at the time of tuning are roughly as follows.
G string: 0.8mmφ 4-5Kg weight, D string; 0.7-0.8mmφ 4-6Kg weight A string: 0.7mmφ 5-6Kg weight, E string: 0.25mmφ 7-9Kg weight In a word, the material of the violin string is different, and the physical conditions are very different, such as the thickness of the E string is one-third that of the G string, and the tension of the E string is twice that of the G string.

The main string instrument exciter 100-100D, 100-1, 100-2, 100-3 are devices with the same basic structure as if playing four strings with different materials and physical conditions with one violin bow. It is an attempt to recreate the excitement of live performance by encouraging the 4th string.
In addition to the above-mentioned specific effects, the stringed instrument exciter 100-100D, 100-1, 100-2, 100-3 have the following features.

(1) The main string instrument exciter 100-100D, 100-1, 100-2, 100-3 have the same appearance, shape, and size, and only the groove width of the engaging part is matched to the string to support 4 strings. is doing.

(2) The main string instrument exciter 100 to 100D, 100-1, 100-2, 100-3 have a structure in which the distance between the source of the excitation vibration and the destination string is very close to several mm. Therefore, it is possible to excite with high transmission efficiency and high sound quality.

(3) The main string instrument exciter 100 to 100D, 100-1, 100-2, 100-3 can be made smaller and thinner so that the distance between the violin strings is about 10 mm. Therefore, simultaneous excitation is possible for the 4th string independently.

(4) As a result of measuring the transmission characteristics by the scale signal by attaching the main string instrument exciter 100 to 100D, 100-1, 100-2, 100-3 independently for each string, the result that both the level characteristics and the frequency characteristics are well aligned is obtained. Obtained (see FIG. 12).

(5) Since the basic structures of the main string instrument exciter 100 to 100D, 100-1, 100-2, and 100-3 are the same, the manufacturing cost can be reduced. In addition, the main string instrument exciter can be attached to and detached from each string by the same operation. Therefore, it can be installed intuitively and is convenient for the user.

(6) Since the appearance, shape, and size are the same, the design when exciting multiple strings is unified.

(7) A signal cable is wired to the vibrating device 30 of the main string instrument exciter 100 to 100D, 100-1, 100-2, 100-3 (see FIG. 1). At this time, by shortening the wiring of the signal cable or the like, the signal cable regulates the board main body 110, so that the rotation (wraparound) of the board main body 110 in the circumferential direction of the strings can be suppressed.

(Second embodiment)
The same components as those in FIG. 2 are assigned the same number, and the description of the overlapping portion will be omitted.
In this embodiment, a stringed instrument exciter 200A attached to a G string (string 15 g) and a D string (string 15d) and a stringed instrument exciter 200B attached to an E string (string 15e) and an A string (string 15a) are used. An example including two stringed instrument exciter 200 is shown.

As described above, in <two-string simultaneous excitation>, the stringed instrument exciter 200A is attached to the G + D string, and the instrument exciter 200B is attached to the A + E string.

The stringed instrument exciter 200A and the stringed instrument exciter 200B have the same configuration. When the stringed instrument exciter 200A and the stringed instrument exciter 200B are generically referred to, they are referred to as the stringed instrument exciter 200.

The stringed instrument exciter 200 is a stringed instrument exciter for two strings attached to the two strings 15.
As shown in FIG. 15, the stringed instrument exciter 200 is provided on the main body board 210 having the first mounting surface 210a and the second mounting surface 210b to the string 15, and the stringed instrument exciter 200 is provided on the main body board 210 and uses the bending force of the string 15. A first engaging portion 221 that engages with the first string 15 and a second engaging portion that is provided on the mounting surface 210a of the main body substrate 210 and engages with the second string 15 by using the bending force of the string 15. The 222 is provided on a surface different from the first mounting surface 210a and the second mounting surface 210b (the surface orthogonal to the first mounting surface 210a and the second mounting surface 210b, respectively), and the vibrating plate of the vibrating device 30 (speaker vibrating plate). A vibration device connecting surface 230 for connecting the voice coil) is provided.

The first engaging portion 221 is an S-shaped string mounting groove grooved in the depth direction from the first mounting surface 210a. The second engaging portion 222 is an S-shaped string mounting groove grooved in the depth direction from the second mounting surface 210b.

In the present embodiment, the connection portion 31 is further attached to the vibration device connection surface 230 (connection portion). The connection portion 31 is not an essential component of the stringed instrument exciter 100 and can be omitted.

<Main board 210>
As shown in FIGS. 15 and 16A, the main body substrate 210 has a first mounting surface 210a, a second mounting surface 210b arranged facing (facing) the first mounting surface 210a, and a first mounting surface 210a. And a vibrating device connecting surface 230 provided on a surface orthogonal to the second mounting surface 210b.

Since the first mounting surface 210a and the second mounting surface 210b are arranged to face each other, the first engaging portion 221 formed on the first mounting surface 210a and the second engagement portion formed on the second mounting surface 210b are engaged. The joint portion 222 is also grooved from the opposite direction.
In the present embodiment, when the stringed instrument exciter 200 is attached to the string 15, the first attachment surface 210a faces the front plate 2 of the violin 1, and the second attachment surface 210b is located in the direction opposite to the front plate 2 of the violin 1. do.

Similar to the main body substrate 110 of FIG. 2, the main body substrate 210 is preferably made of a material that easily transmits vibration, for example, the same material as the material of the piece 20 (for example, a maple material).
In the present embodiment, the main body substrate 210 is a rectangular cuboid member extending inward so as to be locked to two strings. Similar to the main body substrate 110 of FIG. 2, if the shape of the main body substrate 210 is made into a rectangular cuboid shape, processing is easy and no waste is generated in the material. Further, when the rectangular cuboid shape is adopted, it is easy to form the first mounting surface 210a and the second mounting surface 210b and the vibrating device connecting surface 230 on the rectangular cuboid surface. That is, similarly to the main body substrate 110 of FIG. 2, the vibrating device connecting surface 230 attempts to transmit the vibration of sound to the string 15 from the lateral direction. On the other hand, it is preferable that the first engaging portions 221 and 222 formed on the mounting surface 210a are not in the vibration direction of the string 15 in order to suppress the string 15 from falling off. Therefore, by arranging the first mounting surface 210a and the second mounting surface 210b and the vibrating device connecting surface 230 at right angles, the main body substrate 210 is permanently stabilized on the string 15 while transmitting the vibration of sound best. Can be installed.

<1st engaging portion 221, 2nd engaging portion 222>
Groove direction of the groove As shown in FIGS. 15 and 16 (a) and 16 (b), the first engaging portion 221 is located in the depth direction (of the main body substrate 210) from the vicinity of one end of the first mounting surface 210a. The second engaging portion 222 is grooved in the depth direction (inward direction of the main body substrate 210) from the vicinity of the other end portion of the second mounting surface 210b. The distance between the first engaging portion 221 and the second engaging portion 222 is such that the strings 15 are separated from each other in the length direction of the main body substrate 210.
The first engaging portion 221 and the second engaging portion 222 are grooved from opposite directions (180 ° different directions). Further, the first engaging portion 221 and the second engaging portion 222 are spaced apart from each other in the length direction of the main body substrate 210, and are grooved in parallel.

Therefore, the main body substrate 210 of the stringed instrument exciter 200A has a first engaging portion 221 on one of the two strings 15 (string 15 g, string 15d) (here, the string 15 g) (first string). Is attached, and the second engaging portion 222 is attached to the other string 15 (here, the string 15d) (second string). Further, the main body substrate 210 of the stringed instrument exciter 200B has a first engaging portion 221 on one of the two strings 15 (string 15e, string 15a) (here, the string 15e) (first string). Is attached, and the second engaging portion 222 is attached to the other string 15 (here, the string 15a) (second string).

In this way, in the stringed instrument exciter 200, the first engaging portions 221 and 222 are attached to the two strings 15 at intervals between the strings 15 and the strings 15 from the upper and lower two directions. Since the stringed instrument exciter 200 is attached to the two strings 15, the main body substrate 210 does not rotate around the strings 15 to shift the mounting position or shift in the length direction of the strings 15, as shown in FIG. Compared with the stringed instrument exciter 100 main body board 110 shown, the mounting state of the main body board 210 is more stable.

The first engaging portion 221 and the second engaging portion 222 are the weights of the vibrating device 30A and the vibrating device 30B mounted on the G-string and E-string sides, and the D-string and A are used to prevent the G-string and A-string sides from floating. The structure is such that the opening of the strings is on top. As a result, it is possible to prevent the D string and the A string from being lifted with the groove upper side portions of the G string and the E string as fulcrums, and to hold the strings at the groove lower side portions of both grooves.

Groove Depth As shown in FIGS. 15 and 16A, the first engaging portion 221 is an S-shape grooved in the depth direction (inside direction of the main body substrate 210) from the first mounting surface 210a. It is a groove of shape. The second engaging portion 222 is an S-shaped groove grooved in the depth direction (inward direction of the main body substrate 210) from the second mounting surface 210b.
The depth of this groove is grooved to a depth just beside the two strings 15. In the present embodiment, the first engaging portion 221 and the second engaging portion 222 are grooved to approximately half the height of the main body substrate 210. As shown in FIG. 15, when the stringed instrument exciter 200 is attached to two strings 15, these strings 15 are fitted into the bottoms of the first engaging portion 221 and the second engaging portion 222. When the mounting is completed, the stringed instrument exciter 200 has the central portion of the vibrating device connecting surface 230 located right beside the two strings 15.

Groove length As shown in FIGS. 15 and 16 (b), the first engaging portions 221 and 222 are formed over the entire length of the rectangular cuboid main body substrate 210 in the short direction. In the present embodiment, the stringed instrument exciter 200 is attached to the first engaging portion 221 and the second engaging portion 222 with respect to the two strings 15 from two directions, upper and lower. Since the mounting state of the main body board 210 is more stable than that of the main body board 110 shown in FIG. 2, the first engaging portions 221,222 are long enough to be locked in the short direction of the main body board 210. It's fine.

Further, since the two strings 15 are attached to the first engaging portion 221 and the second engaging portion 222 from two directions, the stringed instrument exciter 200 has a synergistic effect due to being attached to the two strings 15. (Effect of suppressing torsional stress and suppressing displacement due to vibration). Therefore, the strings 15 can be reliably and stably mounted without being displaced in the axial direction and the circumferential direction. Further, the first engaging portion 221 and the second engaging portion 222 have an S-shaped groove so that the stringed instrument exciter 200 can be stably attached to the two strings 15 even with a shorter length. be able to.

Groove width As shown in FIGS. 15 and 16 (a) and 16 (b), the first engaging portion 221 and the second engaging portion 222 engage with the strings 15 sandwiched between the walls at both ends of the groove from the left and right directions. It fits. Therefore, the groove width corresponds to the thickness of the string 15. For example, when attached to the G string (string 15 g), the groove width of the first engaging portions 221,222 is a wide groove width corresponding to the thick G string (string 15 g). Further, in order to prevent the attached stringed instrument exciter 200 from shifting, the groove width of the first engaging portion 221 and the second engaging portion 222 should be about the same as the thickness of the string 15, and the string 15 should be attached at the time of attachment. 1 Push it into the engaging portion 211 and the second engaging portion 222 to attach it.
If the material of the main body substrate 210 is wood such as maple material, the groove width is set to be about the same as the thickness of the string 15, so that the first engaging portion 221 and the second engaging portion 222 are slightly deformed. Can be pushed to the bottom. After that, the slightly deformed groove returns to its original position, so that the string 15 mounted on the bottom is engaged at that position.

On the other hand, if the material of the main body substrate 210 is a resin that is not easily deformed, the string 15 is pushed into the first engaging portion 221 and the second engaging portion 222 by making the groove width slightly larger than the thickness of the string 15. be able to.

-Shape of groove As shown in FIGS. 15 and 16 (b), the first engaging portion 221 and the second engaging portion 222 are S-shaped grooves when viewed from the first mounting surface 210a and the second mounting surface 210b. Is. By making the shape of the groove S-shaped, as shown in FIG. 4 (b), the chord 15 has the wall of one convex portion of the first engaging portion 221 and the second engaging portion 222 and the other. At two points with the wall of the convex portion, the two convex portions are strongly abutted and fixed while applying torsional stress. As a result, the stringed instrument exciter 200 can be stably attached to the string 15.

Further, even if the width of the groove is wider than the thickness of the string 15, the string 15 does not come off from the first engaging portions 221,222, so that high processing accuracy for matching the width of the groove with the thickness of the string 15 is unnecessary. Therefore, the cost can be reduced. Since the width of the groove can be made wider than the thickness of the string 15, it is possible to realize a device in which the stringed instrument exciter 200 can be easily attached / detached to / from the string 15. Further, since the strings 15 do not disengage from the first engaging portions 221 and 222, the material of the main body substrate 210 can be simply configured by using a resin that is not easily deformed. Further, even if a soft member such as wood is used as the material of the main body substrate 210, deterioration due to aged use such as a large groove can be prevented.

In the present embodiment, the shape of the groove of the first engaging portions 221 and 222 is S-shaped, but it may be a bell-shaped, wavy-shaped, V-shaped or other wedge-shaped. The S-shaped first engaging portions 221 and 222 used in the present embodiment have an advantage that they are easy to attach and do not depend on the string 15 to be attached because they have a simple structure, no corners, and symmetry in the front-rear direction. be.

Further, in the present embodiment, both the grooves of the first engaging portion 221 and the second engaging portion 222 have an S-shaped shape, but only one of them has an S-shaped shape (for example, the first engaging portion 221). Only S-shaped) may be formed, and the other may be a linear groove. Having a linear groove on the other side has the advantage of being easy to install / remove.

<Vibrator connection surface 230>
The vibrating device connecting surface 230 is a flat surface formed on the side surface of the main body substrate 210 to mount the vibrating device 30. As shown in FIGS. 15 and 16A, the vibrating device connecting surface 230 is a main body substrate in a lateral direction with respect to the string 15 (a direction orthogonal to the string 15 stretched on the front plate 2 of the violin 1). It is formed on the side surface of 210.

The vibrating device connecting surface 230 connects the vibrating device 30, and the vibration (sound vibration) of the vibrating device 30 is passed through the main body substrate 210 to the strings 15 sandwiched between the first engaging portion 221 and the second engaging portion 222. Tell to.
In the present embodiment, the vibrating device 30A is connected to the vibrating device connecting surface 230 of the stringed instrument exciter 200A, and the vibrating device 30B is connected to the vibrating device connecting surface 230 of the stringed instrument exciter 200B.

In this way, the stringed instrument exciter 200 can directly transmit the acoustic vibration of the vibrating device 30 to the string 15 of the violin 1 to vibrate the string 15 itself, and the violin 1 can be vibrated as in the first embodiment. It can be played with high sound quality. As for the reproduction characteristics of the stringed instrument exciter 200, as in the case of the stringed instrument exciter 100, both the frequency characteristics and the distortion characteristics were excellent, and a high-quality and stable reproduced sound could be heard.

The stringed instrument exciter 200 is <two-string simultaneous excitation>. Therefore, the stringed instrument exciter 200A is attached to the G + D string, and the pre-equalizer for string excitation (installed in the phase inversion circuit 60 in FIG. 1) sets the lowest to highest note of the scale reproduction of the G + D string to 200 Hz to 12 kHz. do. Further, the musical instrument exciter 200B is attached to the A + E string, and the pre-equalizer for string excitation sets the lowest to highest sound of the scale reproduction of the A + E string from 400 Hz to 18 kHz, so that the violin 1 has a higher sound quality. Can be sounded with.

Further, since the stringed instrument exciter 200 is attached to the two strings 15, the main body substrate 210 does not rotate around the strings 15 to shift the mounting position or shift in the length direction of the strings 15. Compared with the stringed instrument exciter 100 main body board 110 shown in 2, there is a peculiar effect that the attached state of the main body board 210 is more stable.

In this embodiment, an example including two stringed instrument stimulating devices 200, that is, a stringed instrument stimulating device 200A and a stringed instrument stimulating device 200B, is shown. It may be configured to include one stringed instrument exciter 200.

(Third embodiment)
The same components as those in FIG. 2 are assigned the same number, and the description of the overlapping portion will be omitted.

The stringed instrument exciter 300 is a 4-string stringed instrument exciter attached to the four strings 15.
As described above, in <4 string simultaneous excitation>, the stringed instrument exciter 300 is attached to the 4th string of the G, D, A, and E strings. Further, the pre-equalizer for string vibration (installed in the phase inversion circuit 60 of FIG. 1) preferably has the lowest to highest notes of the scale reproduction of the 4th string at 200 Hz to 18 kHz.

As shown in FIGS. 17 and 18 (a) and 18 (b), the stringed instrument exciter 300 has a main body substrate 310 having a mounting surface 310a to each string 15 and an S grooved in the depth direction from the mounting surface 310a. It is provided with a character-shaped string mounting groove 321 to 324, and a vibrating device connecting surface 331, 332 provided on a surface different from the mounting surface 310a (a surface orthogonal to the mounting surface 310a) and connecting the vibrating device 30.
In the present embodiment, the connecting portion 31 is further attached to the vibrating device connecting surfaces 331 and 332 (connecting portions).
The connection portion 31 is not an essential component of the stringed instrument exciter 100 and can be omitted.
The connecting portion 31 may be attached to the vibrating device 30 side instead of the main body substrate 310. Further, although the connecting portion 31 has a cylindrical shape, it may have a prismatic shape.

<Main board 310>
Similar to the main body substrate 110 of FIG. 2, the main body substrate 310 is preferably made of a material that easily transmits vibration, for example, the same material as the material of the piece 20 (for example, a maple material).

As shown in FIGS. 17 and 18 (a) and 18 (b), the main body substrate 310 is a prismatic prism-shaped member for attaching to each string 15 in the vicinity of the piece 20. Since the main body substrate 310 is attached to each string 15 in the vicinity of the piece 20, the curved shape is similar to the curved structure of the piece 20. That is, as shown in FIG. 18A, the main body substrate 310 has a curved structure similar to the curved shape of the piece 20, and is formed of a gentle curved surface whose upper surface portion is convex upward and is a G string. The height is asymmetrical so that the (low-sound string 15g) side is higher than the E-string (high-sound string 15e) side.

<String mounting grooves 321 to 324>
Groove Direction As shown in FIGS. 17 and 18 (a) and 18 (b), the string mounting grooves 321 to 324 are grooved on the curved mounting surface 310a at intervals of each string 15. Will be done. The string mounting grooves 321 to 324 are spaced apart from each string 15 and are grooved in parallel.

In this way, the stringed instrument exciter 300 is attached to the four strings 15 on the curved mounting surface 310a with a distance between the strings 15 and the strings 15. Since the stringed instrument exciter 300 is attached to the four strings 15, the attached state of the main body substrate 210 is more stable than that of the stringed instrument exciter 100 main body substrate 110 shown in FIG.

Groove Depth As shown in FIGS. 17 and 18 (a), the string mounting grooves 321 to 324 have an S-shape grooved in the depth direction (inside direction of the main body substrate 310) from the mounting surface 310a. It is a groove.
The depth of this groove is grooved to a depth just beside the four strings 15. In the present embodiment, the string mounting grooves 321 to 324 are grooved to approximately half the height of the main body substrate 210. As shown in FIGS. 17 and 18A, when the stringed instrument exciter 300 is attached to the four strings 15, these strings 15 are fitted into the bottoms of the string mounting grooves 321 to 324. When the mounting is completed, in the stringed instrument exciter 300, the central portion of the vibrating device connecting surface 330 is located right beside the four strings 15.

Groove length As shown in FIGS. 17 and 18 (b), the string mounting grooves 321 to 324 are formed over the entire length of the rectangular cuboid main body substrate 310 in the short direction. The stringed instrument exciter 300 is attached to the four strings 15. Compared to the main body board 110 shown in FIG. 2, the main body board 210 has a more stable mounting state.

Groove width As shown in FIGS. 17 and 18 (a) and 18 (b), the string mounting grooves 321 to 324 engage with the strings 15 sandwiched between the walls at both ends of the groove from the left-right direction. Therefore, the groove width corresponds to the thickness of the string 15. For example, when the string is attached to the G string (string 15 g), the groove width of the string attachment groove 321 is a wide groove width corresponding to the thick G string (string 15 g). Similarly, the D string (string 15d), the E string (string 15e), and the A string (string 15a) have a groove width corresponding to the thickness of the string 15.

-Shape of groove As shown in FIGS. 17 and 18 (b), the string mounting grooves 321 to 324 are S-shaped grooves. By making the shape of the groove S-shaped, the stringed instrument exciter 300 can be stably attached to each string 15. Further, by aligning all the shapes of the four grooves of the string mounting grooves 321 to 324 in an S shape, the directionality at the time of mounting can be aligned, and there is an advantage that the mounting is easy.

<Vibration device connection surface 331,332>
The vibrating device connecting surfaces 331 and 332 are flat surfaces formed on the side surface of the main body substrate 310 to mount the vibrating devices 30A and 30B. In the present embodiment, the vibrating device 30A is connected to the vibrating device connecting surface 331, and the vibrating device 30B is connected to the vibrating device connecting surface 332.
As shown in FIGS. 17 and 18 (a), the vibrating device connecting surfaces 331 and 332 are laterally oriented with respect to the string 15 (direction orthogonal to the string 15 stretched on the front plate 2 of the violin 1). It is formed on the side surface of the main body substrate 310.
The vibrating device connecting surfaces 331 and 332 transmit the vibration (sound vibration) of the diaphragms of the vibrating devices 30A and 30B to the four strings 15 sandwiched between the string mounting grooves 321 to 324 via the main body substrate 310.

The vibrating device 30A and the vibrating device 30B vibrate by the sound signal output from the sound source device 50 (see FIG. 2). The sound source device 50 is a sound source that reproduces a sound signal, and the output sound signal is input to the vibration device 30A and the vibration device 30B via the phase inversion circuit 60. The phase inversion circuit 60 (see FIG. 2) inverts a signal having one polarity among the above sound signals and outputs the signal to one of the vibrating device 30A and the vibrating device 30B. The vibrating device 30A and the vibrating device 30B reproduce the sound signal input from the sound source device 50 via the phase inversion circuit 60. Since the vibrating device 30A and the vibrating device 30B drive the side surface of the stringed instrument exciter 400 by push-pull, they have a high driving ability, a wide responsiveness, and a wide dynamic range. Further improvement of the reproduced sound can be expected.
The stringed instrument exciter 300 transmits the acoustic vibration of the vibrating device 30A and the vibrating device 30B to the violin 1 to reverberate the violin 1.

In this way, the stringed instrument exciter 300 can directly transmit the acoustic vibration of the vibrating device 30 to the strings 15 of the violin 1 to vibrate each string 15 itself, and as in each embodiment, the violin 1 can be raised. It can be played with sound quality.

Further, since the stringed instrument exciter 300 is attached to the four strings 15, there is a peculiar effect that the attached state of the main body substrate 310 is more stable than that of the main body substrate 110 of the stringed instrument exciter 100 shown in FIG.

(Fourth Embodiment)
The same components as those in FIG. 2 are assigned the same number, and the description of the overlapping portion will be omitted.

The stringed instrument exciter 400 is a stringed instrument exciter for two strings attached to two strings 15.
As shown in FIGS. 19 and 20 (a) and 20 (b), the stringed instrument exciter 400 adopts a configuration in which two stringed instrument exciter 100 of FIG. 2 are combined.
The stringed instrument exciter 400 includes a back surface of the vibrating device 30A connected to the main body board 110 (right side of FIG. 20 (b)) and a back surface of the vibrating device 30B connected to the main body board 110 (left side of FIG. 20 (b)). And are bonded together to form an integrated configuration as shown in FIGS. 19 and 20 (a).
As shown in FIGS. 19 and 20A, the distance from the engaging portion 120 of one main body substrate 110 to the engaging portion 120 of the other main body substrate 110 is configured to be the same as the distance between the strings 15. Will be done. In FIG. 19, the stringed instrument exciter 400 is attached to two strings 15 (string 15g, string 15d).

Since the vibrating device 30A and the vibrating device 30B drive the side surface of the stringed instrument exciter 400 by push-pull, they have the effects of high driving ability, high responsiveness, and wide dynamic range. Further improvement of the reproduced sound can be expected.
The stringed instrument exciter 400 transmits the acoustic vibration of the vibrating device 30A and the vibrating device 30B to the violin 1 to reverberate the violin 1.

<Modification 7>
The same components as those in FIG. 20 are designated by the same number, and the description of the overlapping portion will be omitted.
As shown in FIG. 21, in the stringed instrument exciter 400A, the back surface of the vibrating device 30A and the back surface of the vibrating device 30B are bonded to each other via the spacer 35. The spacer 35 reduces vibration interference between the vibrating device 30A and the vibrating device 30B. The purpose of the spacer 35 is to practically secure the independence of the 2nd string in the vibration of the 2nd string.

<Modification 8>
The same components as those in FIGS. 19 and 20 (a) and 20 (b) are designated by the same number, and the description of the overlapping portion will be omitted.
As shown in FIGS. 22 and 23 (a) and 23 (b), the stringed instrument exciter 400B replaces the vibrating devices 30A and 30B shown in FIGS. 19 and 20 (a) and 20 (b) with the two-sided vibration speaker 40. (Vibration device) is provided.
The two-side vibration speaker 40 is a speaker provided with a vibration transmission rod that penetrates the center of the speaker from the front to the back, and both end surfaces (connection portions 41 and 42 in FIG. 23) are vibration surfaces.
The two main body boards 110 of the stringed instrument exciter 400B are connected to both side vibration speakers 40 via the connection portions 41 and 42.

As shown in FIGS. 22 and 23 (a), in the stringed instrument exciter 400B, the distance from the engaging portion 120 of one main body substrate 110 to the engaging portion 120 of the other main body substrate 110 is the string 15 and the string 15. It is configured to be the same as the interval of. In FIG. 22, the stringed instrument exciter 400B is attached to any two adjacent strings, for example, two strings 15 (string 15g, string 15d). The connecting portions 41 and 42 are adjusted so that the distance between the engaging portion 120 and the engaging portion 120 is the same as the distance between the strings 15 according to the thickness of the both side vibration speakers 40.

(Fifth Embodiment)
The same components as those in FIG. 2 are assigned the same number, and the description of the overlapping portion will be omitted.

As shown in FIG. 24, the stringed instrument exciter 600 is a two-string stringed instrument exciter attached between two strings 15.
The stringed instrument exciter 600 includes a two-sided vibration speaker 45 (vibration device) using a vibrating body using a magnetostrictive material instead of the two-sided vibration speaker 40 shown in FIG. 23.

As shown in FIG. 25, the stringed instrument exciter 600 is provided on the main body substrate 610 having a mounting surface 610a to be attached to the string 15 from the side surface and the mounting surface 610a of the main body substrate 610, and the string 15 is provided by using the bending force of the string 15. It is provided with an engaging portion 620 that engages with the vibration device, and a vibrating device connecting surface 630 that is provided on a surface different from the mounting surface 610a (the back surface of the mounting surface 610a) and connects the diaphragms of the two-side vibration speaker 45.
The engaging portion 620 is an S-shaped string mounting groove grooved horizontally from the mounting surface 610a.
The distance between the left and right engaging portions 620 is 1 to 1.5 mm wider than the distance between the 2nd strings. The bending force of the string 15 and the restoring force of the second string allow the string 15 and the engaging portion 620 to be stably coupled.

In the first to fourth embodiments, the mounting surface of the main body substrate is formed in the vertical direction with respect to the string 15. On the other hand, in the stringed instrument exciter 600 of the present embodiment, the mounting surface 610a of the main body substrate 610 faces the surface facing the vibrating device connecting surface 630 connecting the diaphragms of the two side vibration speakers 45 (vibrating device connecting surface 630). Is formed on the back of the). Therefore, the S-shaped string mounting groove 620 of the main body substrate 610 is configured to mount the strings 15 on the front plate 2 of the violin 1 in the lateral direction.

The string 15 on the front plate 2 of the violin 1 has many vibration components that vibrate in the lateral direction, but (1) the string mounting groove 620 is S-shaped and strongly locks the string 15. (2) Since the stringed instrument exciter 600 and the double-sided vibrating speaker 45 are installed 1 to 1.5 mm wider than the distance between the two strings without a gap between the strings 15 and 15, the stringed instrument The exciter 600 is stably mounted between the two strings 15 and does not come off or shift.

The two main body boards 610 of the stringed instrument exciter 600 are connected to both side vibration speakers 45 via the connecting portions 46 and 47.
As shown in FIGS. 24 and 25, in the stringed instrument exciter 600, the distance from the string mounting groove 620 of one main body board 610 to the string mounting groove 620 of the other main body board 610 is the distance between the strings 15 and the strings 15. It is configured to have a predetermined width (for example, 1 to 1.5 mm wider). In FIG. 24, the stringed instrument exciter 600 is attached to two strings 15 (string 15g, string 15d). The connecting portions 46 and 47 are adjusted so that the distance between the string mounting groove 620 and the string mounting groove 620 is predetermined wider than the distance between the strings 15 and 15 according to the thickness of the vibration speakers 45 on both sides. To.
In the present embodiment, the connecting portions 46 and 47 are further attached to the vibrating device connecting surface 630 (connecting portion). The connecting portions 46 and 47 are not essential components of the stringed instrument exciter 600 and can be omitted.

According to the present embodiment, the stringed instrument exciter 600 includes an engaging portion (S-shaped string mounting groove) 620 grooved horizontally from the mounting surface 610a, and the distance between the left and right engaging portions 620 is set. Make it 1 to 1.5 mm wider than the distance between the 2 strings. With the bending force of the string 15 and the restoring force of the second string, the string 15 and the engaging portion 620 can be coupled more stably.

<Modification example 9>
As shown in FIG. 26, the stringed instrument exciter 600A of the modified example 9 is provided with a taper 625 at the opening of the string mounting groove 620.

Even the S-shaped string mounting groove 620 has an advantage that it can be easily mounted on the string 15 stretched straight by the taper 625.

The present invention is not limited to the configuration described in each of the above embodiments and modifications, and the configuration can be appropriately changed as long as it does not deviate from the gist of the present invention described in the claims.

The above-described embodiments and modifications have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. .. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

Further, in the present embodiment, the names of the stringed instrument exciter and the stringed instrument exciter system are used, but this is for convenience of explanation, and may be a stringed instrument vibrating device, a stringed instrument reproduction system, or the like.

1 Violin (stringed instrument)
2 Front plate 15, 15e, 15a, 15d, 15g String 20 pieces 30, 30A, 30B Vibration device 40, 45 Both sides vibration speaker (vibration device)
50 Sound source device 60 Phase inversion circuit (pre-equalizer for string vibration)
100,100-1 to 100-3,100A to 100D, 200,200A, 200B, 300,400,400A, 400B, 600,600A Stringed instrument exciter 110, 210, 310, 410,610 Main board 110a, 310a, 610a Mounting surface 120, 120A to 120C, 220, 321 to 324, 420, 620 Engaging part (string mounting groove; engaging part)
125,265 Tapered 126 Spring plate 130,331,332,630 Vibration device connection surface 210a 1st mounting surface 210b 2nd mounting surface 221 1st engaging part 222 2nd engaging part S Stringed instrument excitation system

Claims (14)

It is a stringed instrument exciter that transmits the vibration from the vibrating device to the stringed instrument and resonates the stringed instrument.
A main board having a mounting surface for a stringed instrument on a string,
An engaging portion provided on the mounting surface and engaged with the string,
It is provided on a surface different from the mounting surface, and includes a vibrating device connecting surface for connecting the vibrating device.
The engaging portion engages with the string using the bending force of the string.
Stringed instrument exciter. It is a stringed instrument exciter that transmits the vibration from the vibrating device to the stringed instrument and resonates the stringed instrument.
A main board having a mounting surface for a stringed instrument on a string,
An engaging portion provided on the mounting surface and engaged with the string,
It is provided on a surface different from the mounting surface, and includes a vibrating device connecting surface for connecting the vibrating device.
The engaging portion has a groove whose groove width widens from the groove bottom toward the groove opening, and engages the strings with the groove width on the groove bottom side.
Stringed instrument exciter. It is a stringed instrument exciter that transmits the vibration from the vibrating device to the stringed instrument and resonates the stringed instrument.
A main board having a mounting surface for a stringed instrument on a string,
An engaging portion provided on the mounting surface and engaged with the string,
It is provided on a surface different from the mounting surface, and includes a vibrating device connecting surface for connecting the vibrating device.
The engaging portion is a gently curved groove formed in the depth direction from the mounting surface.
Stringed instrument exciter. It is a stringed instrument exciter that transmits the vibration from the vibrating device to the stringed instrument and resonates the stringed instrument.
A main board having a mounting surface for a stringed instrument on a string,
A first engaging portion provided on the mounting surface and engaged with the first string by using the bending force of the string, and a first engaging portion.
A second engaging portion provided on the mounting surface and engaged with the second string by using the bending force of the string, and a second engaging portion.
A stringed instrument exciter provided on a surface different from the mounting surface and comprising a vibrating device connecting surface for connecting the vibrating device. The mounting surface has a first mounting surface and a second mounting surface arranged to face the first mounting surface.
The stringed instrument exciter according to claim 4 , wherein the first engaging portion is provided on the first mounting surface, and the second engaging portion is provided on the second mounting surface. Claim that the main body substrate and the vibration device are arranged between the first string and the second string, and are engaged with each other by using the tension between the first string and the second string. 4. The stringed instrument exciter according to 4. The stringed instrument exciter according to claim 1, wherein the engaging portion is a gently curved groove formed in the depth direction from the mounting surface. The stringed instrument exciter according to claim 2 , wherein a plurality of the grooves are formed adjacent to the mounting surface at positions facing the strings. The stringed instrument exciter according to claim 7, wherein the curved groove is an S-shaped groove. The stringed instrument exciter according to any one of claims 1 to 3 , wherein the position of the string to which the engaging portion engages is in the vicinity of a piece installed on the front plate of the stringed instrument. The stringed instrument excitation device according to any one of claims 1 to 4, further comprising a vibration damping member that covers the periphery of the vibration device connection surface except for the connection portion to which the vibration device is connected to suppress unnecessary vibration. The stringed instrument exciter according to any one of claims 1 to 11 is provided.
The stringed instrument exciter is a stringed instrument exciter system that independently excites each string at the characteristic frequency of each string as seen from the scale performance example. The stringed instrument exciter according to any one of claims 1 to 11.
A vibrating device attached to the vibrating device connecting surface of the stringed instrument exciter, and a stringed instrument exciting system provided. Sound source device and
13. 13. The stringed instrument excitation system according to 13.

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