JP6387586B2 - Electronic stringed instruments - Google Patents

Description

  The present invention relates to an electronic stringed instrument such as a guitar, mandolin, ukulele, and shamisen.

  For example, in an electronic guitar, as described in Patent Document 1, a guitar body is composed of a body and a neck, and a bridge body is swingably attached to the body of the guitar body. A plurality of piece holding portions are attached to correspond to the plurality of strings, a plurality of piece main bodies are respectively attached to the plurality of piece holding members by shaft members, and a plurality of pieces are stretched across the neck and the trunk portion. There is known a structure in which one end of each string is attached to a plurality of piece bodies.

JP 2000-137488 A

  In such an electronic guitar, a plurality of pickup units are provided on a plurality of piece holding members, respectively, and a plurality of strings are stretched across the neck and the trunk while being pressed against the plurality of pickup units. . In this case, the pickup unit has a detection element such as a piezoelectric element, and when the string is played and vibrates during performance, the detection element expands and contracts with the string vibration to output an electric signal, and this electric signal is output. A musical tone is generated based on the signal.

  However, in such an electronic guitar, since the string is directly pressed against the pickup section, if the detection element of the pickup section is exposed, the string will be used when tuning the string or playing the string during performance. However, there is a problem that the detection element is easily damaged.

  The problem to be solved by the present invention is to prevent damage to the detection element of the conversion unit, which is a pickup unit, to have a simple structure, good assembly work, and to accurately output an electric signal accompanying string vibration. It is to provide an electronic stringed instrument that can

The present invention relates to a musical instrument main body, a plurality of strings stretched on the musical instrument main body, a bridge main body provided on the musical instrument main body, to which one end of each of the plurality of strings is attached, and on the bridge main body A plurality of bridge pieces arranged corresponding to each of the plurality of strings and supporting the plurality of strings, respectively, and supporting the plurality of bridge pieces on the bridge body in a displaceable manner, and the plurality of strings A plurality of converters that convert and output pressure changes applied to the plurality of bridge pieces in accordance with the vibrations, respectively, and the plurality of strings and the bridge pieces each have conductivity, The plurality of conversion portions are a plurality of insulating tubes respectively disposed in a plurality of string attachment holes provided in the bridge body, and the plurality of conversion tubes are inserted into the plurality of insulating tubes. An electronic stringed instrument characterized in that it comprises a plurality of connecting cables connected to conduct with each number string.
According to another aspect of the present invention, there is provided a musical instrument main body, a plurality of strings stretched on the musical instrument main body, a bridge main body provided on the musical instrument main body, and attached to each end of the plurality of strings. A plurality of bridge pieces arranged on the bridge body corresponding to the plurality of strings and supporting the plurality of strings, respectively, and a plurality of bridge pieces supported on the bridge body in a displaceable manner. And a plurality of converters that convert the pressure changes applied to the plurality of bridge pieces with each vibration of the plurality of strings into electrical signals and output the electrical signals, respectively, each of the plurality of converters, A plurality of string height adjusting screws for adjusting the string height of the string, and at least a part of each of the string height adjusting screws is formed with a detection element that converts the pressure change into an electrical signal; String harmonic Screw respectively conduct separately, an electronic stringed instrument characterized by having a signal transmitting unit for transmitting the plurality of generated respectively string height adjustment screw and the electric signals respectively separately.
According to another aspect of the present invention, there is provided a musical instrument main body, a plurality of strings stretched on the musical instrument main body, a bridge main body provided on the musical instrument main body, and attached to each end of the plurality of strings. A plurality of bridge pieces arranged on the bridge body corresponding to the plurality of strings and supporting the plurality of strings, respectively, and a plurality of bridge pieces supported on the bridge body in a displaceable manner. And a plurality of converters that convert the pressure changes applied to the plurality of bridge pieces with each vibration of the plurality of strings into electrical signals and output the electrical signals, respectively, each of the plurality of converters, A plurality of detection elements for detecting the pressure change applied to the bridge piece, wherein the plurality of detection elements are different in potential of electric signals output from the respective detection elements depending on a direction in which the string is played; An electronic stringed instrument characterized in that it is arranged differently.

  According to the present invention, since the plurality of strings are not in direct contact with the plurality of conversion units, it is possible to prevent the detection element from being damaged and simplify the structure of the plurality of conversion units. On the other hand, since the plurality of bridge pieces can be supported on the bridge body so as to be vertically displaceable by the plurality of conversion units, the string heights of the plurality of strings can be adjusted. For this reason, even if the conversion unit also has a string height adjusting function, the assembling work can be simplified, and the conversion unit can accurately and satisfactorily output an electric signal accompanying string vibration.

It is the front view which showed 1st Embodiment which applied this invention to the electronic guitar. It is an expanded sectional view of the principal part which showed the bridge | bridging part of the electronic guitar shown by FIG. It is the expanded sectional view which decomposed | disassembled and showed the bridge | bridging part shown by FIG. FIG. 3 is an enlarged perspective view showing a bridge piece and a string of the bridge portion shown in FIG. 2. It is the block diagram which showed the circuit structure of the electronic guitar shown by FIG. FIG. 5 is an enlarged perspective view, partly broken, illustrating a modification of the connecting portion in the first embodiment of the electronic guitar shown in FIG. 4. In 2nd Embodiment which applied this invention to the electronic guitar, it is the expanded sectional view which showed the bridge | bridging part of the electronic guitar. FIG. 8 is an enlarged perspective view showing a bridge piece and a string of the bridge portion shown in FIG. 7. FIG. 8 is an enlarged plan view showing a state where a part of the plurality of bridge pieces is removed and a part of the plurality of conductive plates is exposed in the bridge portion shown in FIG. 7. In 3rd Embodiment which applied this invention to the electronic guitar, it is the expansion perspective view which showed the bridge | brown piece and the string in the bridge part of an electronic guitar. FIG. 11 is an enlarged plan view showing a state where a part of a plurality of bridge pieces is removed and a part of a plurality of conductive plates is exposed in the bridge portion shown in FIG. 10. It is the expanded sectional view which showed the modification of the pick-up part in the electronic guitar to which this invention is applied.

(First embodiment)
A first embodiment in which the present invention is applied to an electronic guitar will be described below with reference to FIGS.
As shown in FIG. 1, this electronic guitar includes a guitar body 1. The guitar body 1 is composed of a body 2 and a neck 3. The guitar body 1 is configured such that a plurality (six in this embodiment) of strings 4 are stretched across the trunk 2 and the neck 3.

  In this case, a bridge portion 5 to which each one end portion 4a of the plurality of strings 4 is attached is provided at a substantially central portion of the trunk portion 2, as shown in FIG. In the vicinity of the bridge portion 5, an electromagnetic normal pickup portion 6 that outputs each string vibration of the plurality of strings 4 as an electric signal is provided. In addition, the body portion 2 is provided with an electronic circuit portion 7 and a display portion 8. The electronic circuit unit 7 includes various electronic components necessary for an electronic guitar. The display unit 8 is configured to display various kinds of information necessary for performance by the electronic guitar.

  On the other hand, as shown in FIG. 1, a head 10 is provided at the distal end portion (right end portion in FIG. 1) of the neck 3 via a string support portion 9. The string support portion 9 is configured to support the plurality of strings 4 at equal intervals. The head 10 is provided with a plurality of pegs 11 to which the other end portions 4b of the plurality of strings 4 are attached so that the string tension can be adjusted. As a result, the plurality of strings 4 are configured to be stretched between the bridge portion 5 of the trunk portion 2 and the head 10. Each of the plurality of strings 4 is a conductive wire, and is configured such that a current flows with an electrical resistance.

  Further, as shown in FIG. 1, a fingerboard 12 is provided on the neck 3 between the body 2 and the head 10. The fingerboard 12 is a strip-shaped board made of wood or synthetic resin, and a plurality of (22 in this embodiment) frets 13 are arranged at a predetermined interval along the extending direction of the plurality of strings 4, that is, the longitudinal direction of the neck 3. Is provided. The plurality of frets 13 are made of metal, have a semicircular cross section, are attached to the upper surface of the finger plate 12, and the plurality of strings 4 are formed on the upper surface, which is an arc surface protruding from the upper surface of the finger plate 12. Each is configured to be pressed.

  By the way, the bridge part 5 to which each one end part 4a (left end part in FIG. 1) of the plurality of strings 4 is attached is in a bridge hole 14 provided in the central part of the trunk part 2, as shown in FIGS. And a plurality of bridge pieces 16 arranged on the bridge main body 15 in correspondence with the plurality of strings 4 respectively.

  As shown in FIGS. 2 and 3, the bridge main body 15 includes a metal bridge block 17 and a metal bridge base 18. The bridge block 17 is disposed in the bridge hole 14 of the trunk portion 2 and is configured to protrude upward from the trunk portion 2. The bridge base 18 is mounted on the bridge block 17 protruding upward from the body 2 by screws 18b.

  2 and 3, the bridge body 15 has a spring member 20 attached to the lower portion of the bridge block 17, and the spring force of the spring member 20 is directed toward the neck 3 side (left side in FIG. 2). In the biased state, the distal end portion 18a of the bridge base 18, that is, the distal end portion 18a positioned on the neck 3 side is pressed against the pin member 21 provided on the trunk portion 2, thereby causing the bridge of the trunk portion 2 to bridge. A bridge block 17 floats in the hole 14 and is swingably attached.

  In this case, a tremolo arm 22 is attached to the bridge body 15 as shown in FIG. The tremolo arm 22 is operated to swing the bridge body 15 in the direction in which the strings 4 are stretched and in the direction perpendicular thereto, thereby changing the tension of the plurality of strings 4 and adding sound effects. It is configured to let you. The bridge body 15 is connected to the ground (reference potential). A back cover 14 a that closes the bridge hole 14 is attached to the lower portion of the body portion 2.

  On the other hand, the plurality of bridge pieces 16 are each formed of a conductive metal plate. As shown in FIGS. 2 and 3, each of the plurality of bridge pieces 16 includes a plate-like piece body 23 and a mountain-shaped string support provided at the front end portion (left end portion in FIG. 2) of the piece body 23. And a plate-like attachment projection 25 provided at the rear end (right end in FIG. 2) of the piece main body 23, and is configured to be disposed on the bridge base 18.

  Further, as shown in FIGS. 2 and 3, each string support portion 24 of the plurality of bridge pieces 16 is provided with a pickup portion 26 that is a conversion portion. The plurality of pickup units 26 support the plurality of bridge pieces 16 on the bridge body 15 so as to be displaceable in the vertical direction, and change the pressure applied to the plurality of bridge pieces 16 with each vibration of the plurality of strings 4. Each is converted into an electrical signal and output.

  In this case, as shown in FIGS. 2 and 3, the pickup unit 26 has a pair of string height adjusting screws 27 for adjusting the string heights of the plurality of strings 4, respectively. The pair of string height adjusting screws 27 is formed as a detection element that converts a pressure change accompanying each vibration of the plurality of strings 4 into an electric signal and outputs the electric signal. In this case, the detection element is a piezoelectric element having a ceramic structure, for example, and is formed in a male screw shape.

That is, the string height adjusting screw 27 made of a piezoelectric element having a ceramic structure is mixed with a metal oxide powder such as PbO, NiO, Nb ₂ O ₃ , TiO ₂ or ZrO ₂ at a predetermined ratio. The piezo material powder is formed by filling the piezo material powder in a male screw mold, sintering, releasing the mold, and post-processing. As a result, the string height adjusting screw 27 made of a piezo material is configured to generate an electric potential difference when a vibration or pressure is applied, and to output an electric signal corresponding to the electric potential difference from the surface. .

  In this case, as shown in FIGS. 2 to 4, the pair of string height adjusting screws 27 includes one string height adjusting screw 27 positioned in the direction in which the string 4 is played, The distortion differs with the other string height adjusting screw 27 located in the opposite direction. That is, when the pressure of one string height adjusting screw 27 is large, the pressure of the other string height adjusting screw 27 is decreased. For this reason, the pickup unit 26 is configured so that the potential difference generated inside each of the pair of string height adjusting screws 27 is different, the two different potential differences are mixed, and the mixed potential difference is output as an electric signal. ing.

  Further, as shown in FIGS. 2 and 3, the pair of string height adjusting screws 27 are respectively screwed into the respective screw holes 24 a of the string support part 24 of the bridge piece 16 so as to protrude from the upper part to the lower part. . As a result, the pair of string height adjusting screws 27 is turned so that each lower end portion of each string height adjusting screw 27 protrudes and lowers on the lower side of the bridge piece 16 and is pressed onto the bridge base 18. Above, the bridge piece 16 is displaced up and down to adjust the string height of the string 4.

  Further, as shown in FIGS. 2 and 3, the pair of string height adjusting screws 27 are screwed into the respective screw holes 24a of the string support portion 24 of the bridge piece 16, so that vibration and pressure are applied. When a potential difference is generated inside, the bridge piece 16 side becomes one electrode (output electrode), and each lower end portion of each string height adjusting screw 27 is pressed onto the bridge base 18. The side is configured to be the other electrode (ground electrode).

  Further, as shown in FIGS. 2 and 3, an octave adjusting screw 28 is attached to the attachment protrusion 25 of the bridge piece 16. The octave adjusting screw 28 is formed of an insulating synthetic resin, and a screw portion 28b on the tip side thereof is inserted into an attachment projection portion 25 of the bridge piece 16 through an insertion hole 29a provided in the attachment portion 29 of the bridge base 18. It is screwed into the provided screw hole 25a.

  On the outer periphery of the octave adjusting screw 28, as shown in FIG. 2, a synthetic resin coil spring 30 having insulating properties is provided between the mounting projection 25 of the bridge piece 16 and the mounting portion 29 of the bridge base 18. Is located. The coil spring 30 urges the mounting protrusion 25 of the bridge piece 16 in a direction to push it toward the front side (left side in FIG. 2), so that the head portion 28 a of the octave adjusting screw 28 is attached to the mounting portion 29 of the bridge base 18. It is comprised so that it may press on the outer surface (right side in FIG. 2).

  For this reason, the mounting protrusion 25 of the bridge piece 16 and the mounting portion 29 of the bridge base 18 are configured to be urged away from each other by the spring force of the coil spring 30, as shown in FIG. . Accordingly, the bridge piece 16 is configured to be arranged in a state of being floated above the bridge base 18 by the pair of string height adjusting screws 27 and the octave adjusting screws 28.

  In this state, as shown in FIG. 2, when the octave adjusting screw 28 is turned, the octave adjusting screw 28 rotates with the head portion 28 a in contact with the mounting portion 29 of the bridge base 18, and the screw portion 28 b on the distal end side rotates. The bridge piece 16 is configured to move in the front-rear direction (left-right direction in FIG. 2) of the bridge base 18 by spirally moving in the screw hole 25a of the mounting projection 25 of the bridge piece 16 while rotating.

  That is, as shown in FIG. 2, the octave adjusting screw 28 is turned by the spring force of the coil spring 30 when the mounting protrusion 25 of the bridge piece 16 is pushed toward the front side (left side in FIG. 2). The piece 16 moves forward and is adjusted so as to lower the octave of the string 4.

  Further, as shown in FIG. 2, the octave adjusting screw 28 is turned so that the mounting protrusion 25 of the bridge piece 16 faces the rear side (right side in FIG. 2) against the spring force of the coil spring 30. When pulled, the bridge piece 16 moves rearward and adjusts in the direction of raising the octave of the string 4.

  By the way, as shown in FIGS. 2 and 3, each of the plurality of strings 4 has a bridge block whose one end 4 a passes through the string insertion hole 23 a of the bridge body 16 and the string insertion hole 18 c of the bridge base 18. It is configured to be attached in a state where it is inserted into each of the 17 string attachment holes 31.

  In this case, as shown in FIGS. 2 to 4, end balls 32 having conductivity are respectively attached to the one end portions 4 a of the plurality of strings 4. Further, each end 4a of the plurality of strings 4 is inserted into the string attachment hole 31 of the bridge block 17 via the insulating tube 33, so that it does not contact with the bridge block 17 and the bridge base 18 to be conducted. It is configured as follows.

  In this case, as shown in FIGS. 2 and 3, the string attachment hole 31 of the bridge block 17 has an upper portion formed in the small diameter hole 31a, a lower portion formed in the large diameter hole 31, and an intermediate portion formed in the medium diameter hole 31c. In the state where the small diameter tapered portion 31d is constricted at the boundary between the small diameter hole 31a and the medium diameter hole 31c, and the large diameter tapered portion 31e is constricted at the boundary between the medium diameter hole 31c and the large diameter hole 31b. Is formed.

  The insulating tube 33 is formed of an insulating synthetic resin such as vinyl chloride resin (PVC). As shown in FIGS. 2 to 4, the insulating tube 33 includes a small-diameter hole 33 a into which the string 4 is inserted and a large-diameter hole 33 b into which the end ball 32 is inserted, like the string attachment hole 31 of the bridge block 17. And a medium-diameter hole portion 33c located in the middle of the small-diameter hole portion 33a. The small-diameter taper portion 33d is constricted between the small-diameter hole portion 33a and the medium-diameter hole portion 33c. A large-diameter tapered portion 33e is constricted at the boundary with the hole 33b.

  As a result, as shown in FIGS. 2 to 4, in the insulating tube 33, the large-diameter hole portion 33 b is inserted into the large-diameter hole 31 b of the string attachment hole 31 of the bridge block 17, and the large-diameter taper portion 33 e becomes the string. The medium diameter hole 33c is inserted into the medium diameter hole 31c of the string attachment hole 31 and the small diameter taper part 33d contacts the small diameter taper part 31d of the string attachment hole 31. The small-diameter hole portion 33 a is configured to be inserted into the small-diameter hole 31 a of the string attachment hole 31 and the string insertion hole 18 c of the bridge base 18 while being in contact with each other.

  Moreover, as shown in FIGS. 2 to 4, a conductive tube 34 is provided inside the insulating tube 33. The conductive tube 34 has a string insertion portion 34a into which one end 4a of the string 4 is inserted, and a wide-mouth taper portion 34b provided at a lower end portion of the string insertion portion 34a. The string insertion portion 34a is an insulating tube. It is configured to be inserted into the insulating tube 33 in a state in which the wide opening taper portion 34 b is in contact with the large diameter taper portion 33 e of the insulating tube 33.

  Thereby, as shown in FIGS. 2 to 4, when the end ball 32 is inserted into the large-diameter hole portion 33 b of the insulating tube 33 with the conductive tube 34 disposed in the insulating tube 33, The end ball 32 is configured to be electrically connected to the end ball 32 by contacting the tapered portion 34 b of the conductive tube 34.

  Further, as shown in FIGS. 2 to 4, the conductive tube 34 has a connection cable 35 joined to the lower end thereof by soldering or caulking, and is electrically connected to the electronic circuit unit 7 by the connection cable 35. . As a result, each of the plurality of strings 4 has a current flowing through each bridge piece 16 due to a potential difference generated by each pair of string height adjusting screws 27, and this current flows through each end ball 32 and each conductive tube 34. Each connection cable 35 is configured to flow.

  In this case, as shown in FIGS. 2 to 4, the plurality of strings 4 do not come into contact with the bridge main body 15 of the bridge portion 5 by the insulating tube 33, and the string attachment holes 31 of the bridge block 17 and the bridge base 18 are not touched. The string insertion hole 18c and the bridge piece 16 pass through the string insertion hole 23a of the piece body 23 and are pressed onto the string support portion 24 of the bridge piece 16 so as to be stretched without mutual conduction. Has been.

Next, the circuit configuration of the electronic guitar will be described with reference to the block diagram shown in FIG.
The circuit configuration of this electronic guitar includes a CPU (Central Processing Unit) 40 that controls the entire circuit, a memory unit 41 that stores a predetermined program and input data, and various types such as volume, tone, and mode switching. An operation switch unit 42 provided with a switch and a musical sound detection unit 43 that detects string vibration caused by a string operation of a plurality of strings 4 as musical sound information are provided.

  The musical sound detection unit 43 includes an electromagnetic normal pickup unit 6 and a piezoelectric element pickup unit 26. When the plurality of strings 4 are played, the normal pickup unit 6 detects the vibrations of the strings 4 as actual musical sounds. The pickup unit 26 of the piezo element detects a pressure change corresponding to each string vibration of the plurality of strings 4 as musical sound information.

  The CPU 40 controls the tone generation timing of the tone and the pitch of the tone being generated based on the string vibration from the normal pickup unit 6. Further, the CPU 40 controls the pitch and tone quality of the musical sound that is generated based on the pressure change caused by each string vibration from the pickup unit 26 of the piezo element.

  The circuit configuration of the electronic guitar includes a display unit 8 that displays various information based on commands from the CPU 40, and a sound source unit that generates musical tone data based on pitch, sound quality, and sounding timing commands from the CPU 40. 44, an effect unit 45 for adding an effect to the musical sound data generated by the tone generator unit 44, and a D for converting the musical sound data to which the effect is added by the effect unit 45 into an analog signal and outputting it to an audio device An / A conversion unit 46 and an interface (I / F) 47 that exchanges data with an external device based on a command from the CPU 40 are provided.

Next, the operation of such an electronic guitar will be described.
When playing with this electronic guitar, like the acoustic guitar, a plurality of strings 4 stretched on the fingerboard 12 of the neck 3 are pressed with a finger and pressed against any one of the plurality of frets 13. Play the corresponding string 4.

  At this time, the vibrations of the plurality of strings 4 are detected by the normal pickup unit 6 of the tone detection unit 43, and the pressures caused by the vibrations of the plurality of strings 4 pushed by the pickup unit 26 of the piezo element of the tone detection unit 43 are detected. Each change is detected as musical tone information, and a musical tone is generated based on the detected information.

  That is, when the plurality of strings 4 pressed against the fret 13 are each played, the normal pickup unit 6 detects the vibration of the entire strings 4. When a plurality of strings 4 pressed against the fret 13 are each played, the pair of string height adjusting screws 27 converts the pressure change associated with each vibration of each string 4 into an electrical signal. Output.

  At this time, of the pair of string height adjusting screws 27, distortion is caused by one string height adjusting screw 27 positioned in the direction in which the string 4 is played and the other string height adjusting screw 27 positioned in the opposite direction. Is different. Therefore, the pickup unit 26 has different potential differences generated inside each of the pair of string height adjusting screws 27, the two different potential differences are mixed, and the mixed potential difference is output as musical tone information.

  Then, the CPU 40 causes the sound source unit 44 to use the tone pitch information and the sound generation start information detected by the normal pickup unit 6 and the tone information for each string 4 by each string vibration detected by the pickup unit 26 of the piezo element. A sound source data is generated by giving a command, and musical sound data is generated by the effect unit 45 based on the sound source data and output to an audio device to generate a musical sound. At this time, since the electrical signal in which different potential differences are mixed by the pair of string height adjusting screws 27 is output from the pickup unit 26, the output signal becomes rich, and an effect like a halftone of a guitar can be obtained.

  Further, if the player puts his hand on the bridge piece 16 so as not to touch the string 4, the pair of string height adjusting screws 27 picks up the string vibration and generates a DC signal in the direction in which the bridge piece 16 sinks. Output. For this reason, the waveform signal by string vibration can be used for sound and the DC signal can be used for control. Thus, by applying pressure to the bridge piece 16 to increase the reverb component, changing the cutoff of the filter, or changing the envelope of the sound source if it is a guitar synthesizer, it is impossible to think of a guitar that has never been considered before Performance can be realized.

  Thus, according to this electronic guitar, the plurality of conductive strings 4 stretched on the guitar body 1 and the body 2 of the guitar body 1 are swingably provided. A bridge body 14 to which each one end 4a is attached, a plurality of bridge pieces 15 arranged on the bridge body 14 corresponding to each of the plurality of strings 4 and supporting each of the plurality of strings 4, and the plurality of bridges Each of the pieces 15 is supported on the bridge body 14 so as to be displaceable in the vertical direction, and includes a plurality of pickup units 26 that respectively convert pressure changes associated with the vibrations of the plurality of strings 4 into electrical signals and output them. Therefore, the structure of the pickup unit 26 can be simplified, the assembling workability can be improved, and the electric signal accompanying the string vibration can be output accurately.

  That is, in this electronic guitar, since the plurality of strings 4 are not in direct contact with the plurality of pickup units 26, the structure of the plurality of pickup units 26 can be simplified, and a plurality of pickup units 26 can be used. Since the bridge piece 15 can be supported on the bridge body 14 so as to be vertically displaceable, the string heights of the plurality of strings 4 can be adjusted. For this reason, even if the pickup unit 26 has a string height adjusting function, the assembling work can be simplified, and the pickup unit 26 can accurately and satisfactorily output an electric signal accompanying string vibration. As a result, musical tone information can be accurately and reliably detected and played well.

  In this case, the plurality of pickup units 26 have a pair of string height adjusting screws 27 for respectively adjusting the string heights of the plurality of strings 4, and convert pressure changes associated with the vibrations of the plurality of strings 4 into electrical signals, respectively. Since each of them is made of a material that forms a detection element such as a piezo element that is output, the pair of string height adjusting screws 27 themselves can function as a detection element such as a piezo element. The structure of the part 26 can be simplified, and the assembling work can be simplified.

That is, when the pair of string height adjusting screws 27 is formed into a male screw shape by, for example, a piezo element having a ceramic structure, a powder of a metal oxide such as PbO, NiO, Nb ₂ O ₃ , TiO ₂ , ZrO ₂ or the like is used. It can be easily and easily manufactured by filling the powder of the piezo material mixed at a ratio into a male screw mold and sintering, then releasing and post-processing, thereby comprising the piezo material When vibration or pressure is applied to the string height adjusting screw 27, distortion occurs and a potential difference is generated inside, and an electric signal corresponding to the potential difference can be output from the surface.

  In this case, the pair of string height adjusting screws 27 are screwed into the respective screw holes 24a of the string support portion 24 of the bridge piece 16 so as to protrude from the upper part to the lower part thereof, thereby attaching the bridge piece 15 to the bridge piece 15. Can be simplified. As a result, the pair of string height adjusting screws 27 is turned so that each lower end portion of each string height adjusting screw 27 protrudes and lowers on the lower side of the bridge piece 16 and is pressed onto the bridge base 18. Above, the bridge piece 16 can be displaced up and down to easily adjust the string height of the string 4.

  For this reason, the pair of string height adjusting screws 27 generates a potential difference inside according to the pressure change caused by the vibration of the string 4, and when this potential difference is output as musical tone information, the string support portion 24 of the bridge piece 16. The bridge piece 16 side becomes one electrode (output electrode), and the lower ends of the string height adjusting screws 27 are pressed onto the bridge base 18 by being screwed into the screw holes 24a. Thus, since the bridge base 18 side is the other electrode (ground electrode), the electric signal generated by the pair of string height adjusting screws 27 can be easily and accurately extracted.

  In this case, the plurality of strings 4 and the plurality of bridge pieces 15 are formed of conductive metal, and the plurality of pickup portions 26 are respectively disposed in the plurality of string attachment holes 31 provided in the bridge body 14. A plurality of insulating tubes 33, a plurality of conductive tubes 34 respectively conducting to the plurality of strings 4 inserted in the plurality of insulating tubes 33, and a plurality of connection cables 35 respectively connected to the plurality of conductive tubes 34. Therefore, each potential difference generated in each pair of string height adjusting screws 27 in accordance with a pressure change accompanying each vibration of the plurality of strings 4 can be accurately and reliably extracted as musical tone information.

  That is, in this electronic guitar, currents due to potential differences generated in the pair of string height adjusting screws 27 in response to pressure changes caused by vibrations of the plurality of strings 4 are applied to the strings 4 via the bridge pieces 16. The currents flowing through the strings 4 flow to the connection cables 35 via the end balls 32 and the conductive tubes 34 attached to the one end portions 4a of the strings 4, respectively. Each potential difference generated in each pair of string height adjusting screws 27 in accordance with the pressure change accompanying each vibration can be accurately and reliably extracted as musical tone information.

  In this case, when the string 4 is played, the pair of string height adjusting screws 27 is one string height adjusting screw 27 positioned in the direction in which the string 4 is played and the other string height adjusting screw 27 positioned in the opposite direction. Since the distortion differs between the screw 27 and the potential difference generated inside each string height adjusting screw 27 is different, the two different potential differences are mixed and the mixed potential difference is output as an electric signal. In addition to accurately and surely detecting musical tone information from the output signal and performing well, the output signal is abundant and effects such as a guitar halftone can be obtained.

  In the above-described first embodiment, the case where the conductive tube 34 is inserted into the insulating tube 33 and the end ball 32 of the string 4 is brought into contact with the conductive tube 34 to conduct is described. For example, as in the modification shown in FIG. 6, a conductive layer 50 is provided on the inner surface of the insulating tube 33, the end ball 32 is brought into contact with the conductive layer 50 to conduct, and the insulating tube is sandwiched between the conductive layers 50. A configuration in which the connection clip 51 is attached to the lower end of 33 and the connection cable 35 is connected to the connection clip 51 may be employed.

  Even in such a configuration, the end ball 32 of the string 4 can be brought into contact with the conductive layer 50 provided on the inner surface of the insulating tube 33 and can be conducted. Therefore, the pickup unit 26 can be connected by the conductive layer 50 and the connection cable 35. The electric potential difference generated in step S3 can be taken out as an electric signal, whereby the pickup unit 26 can reliably take out an electric signal corresponding to a pressure change accompanying each vibration of the string 4 as musical sound information.

(Second Embodiment)
Next, a second embodiment in which the present invention is applied to an electronic guitar will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as 1st Embodiment shown by FIGS.
As shown in FIGS. 7 and 8, the electronic guitar includes an insulating plate 55 disposed between the bridge body 14 of the bridge portion 5 and the plurality of bridge pieces 15, and a plurality of bridge pieces on the insulating plate 55. 15 and a plurality of conductive plates 56 arranged corresponding to each of them, and the other configuration is substantially the same as that of the first embodiment.

  That is, the insulating plate 55 is made of a synthetic resin and is disposed on the upper surface of the bridge base 18 over almost the entire region as shown in FIGS. The insulating plate 55 is provided with a plurality of string insertion holes 55a corresponding to the string insertion holes 18c of the bridge base 18, respectively. The plurality of conductive plates 56 are made of a thin metal plate having high conductivity such as copper, and each bridge piece 16 is arranged on the upper surface thereof.

  That is, as shown in FIGS. 7 to 9, the conductive plate 56 includes a main body portion 56 a that is brought into contact with the lower ends of a pair of string height adjusting screws 27 of the pickup portion 26 attached to the bridge piece 16, and a conductive portion 56 a. A wiring portion 56b extending from the main body portion 56a to a predetermined portion of the insulating plate 55, that is, a portion not corresponding to the bridge piece 16, is connected to a connector 57 provided on the lower surface of the insulating plate 55. It is configured to be.

  In this case, the connector 57 is configured to allow six types of signals and ground (reference potential) to pass therethrough. That is, as shown in FIGS. 7 to 9, the connector 57 is connected to the wiring portions 56 b of the plurality of conductive plates 56. In this state, the connector 57 is connected to the bridge base 18 through the insertion holes 18 d. The connection cable 58 is configured to protrude downward and to be connected to the protruding portion.

  Thereby, as shown in FIGS. 7 to 9, the plurality of conductive plates 56 are electrically connected to the electronic circuit unit 7 by the connection cable 58, so that the pair of string height adjusting screws 27 of the pickup unit 26 are used. An electric signal corresponding to the generated pressure change is supplied to the electronic circuit unit 7. Also in this case, the pickup unit 26 is configured by a pair of string height adjusting screws 27 made of a piezo material, as in the first embodiment.

  As shown in FIGS. 7 to 9, these pair of string height adjusting screws 27 are screwed into the respective screw holes 24 a of the string support part 24 of the bridge piece 16, and each lower end thereof is connected to the conductive plate 56. By being pressed against the main body portion 56a, when vibration or pressure is applied, distortion occurs and a potential difference is generated inside, and an electric signal corresponding to the potential difference is output from the surface.

  In this case, as shown in FIGS. 7 to 9, the pair of string height adjusting screws 27 includes one string height adjusting screw 27 located in the direction in which the string 4 is played, and the string height adjusting screw 27. The distortion differs with the other string height adjusting screw 27 located in the opposite direction. That is, when the pressure of one string height adjusting screw 27 is large, the pressure of the other string height adjusting screw 27 is decreased. Therefore, as in the first embodiment, the pickup unit 26 differs in potential difference generated inside each of the pair of string height adjusting screws 27, the two different potential differences are mixed, and the mixed potential difference is converted into an electric signal. Is configured to output as

  Also in this case, the pair of string height adjusting screws 27 is turned to cause each lower end portion of each string height adjusting screw 27 to appear below and below the bridge piece 16 as in the first embodiment. By pressing on 18, the bridge piece 16 is displaced up and down on the bridge base 18 to adjust the string height of the string 4.

  Further, the octave adjusting screw 28 and the coil spring 30 are each formed of a synthetic resin having insulating properties, as in the first embodiment. Thus, the bridge piece 16 is configured to be disposed above the bridge base 18 by the pair of string height adjusting screws 27, the octave adjusting screws 28, and the coil springs 30.

  On the other hand, in the bridge body 15, as shown in FIG. 7, a plurality of string attachment holes 31 into which the respective one end portions 4 a of the plurality of strings 4 are inserted correspond to the respective string insertion holes 23 a of the plurality of bridge pieces 16. Is provided. A plurality of insulating tubes 33 are arranged in each of the plurality of string attachment holes 31. In this case, the string attachment hole 31 of the bridge body 15 has an upper portion formed in the small diameter hole 31a and a lower portion formed in the large diameter hole 31b, and the tapered portion 31d is constricted at the boundary between the small diameter hole 31a and the large diameter hole 31b. It is formed in the state.

  The insulating tube 33 is formed of an insulating synthetic resin such as vinyl chloride resin (PVC) as in the first embodiment. Similar to the string attachment hole 31 of the bridge block 17, the insulating tube 33 has a small diameter hole 33a into which the string 4 is inserted and a large diameter hole 33b into which the end ball 32 is inserted. A tapered portion 33d is formed in a constricted state at the boundary with the radial hole portion 33b.

  Also in this case, as shown in FIG. 7, the plurality of strings 4 can contact the bridge body 15 of the bridge portion 5 by the insulating tube 33 in a state where the end balls 32 are attached to the respective end portions 4a. The string of the bridge piece 16 passes through the string attachment hole 31 of the bridge block 17, the string insertion hole 18 c of the bridge base 18, the string insertion hole 55 a of the insulating plate 55, and the string insertion hole 23 a of the piece body 23 of the bridge piece 16. In a state where it is pressed onto the support portion 24, it is configured to be stretched without being electrically connected to each other.

Next, the operation of such an electronic guitar will be described.
When playing with this electronic guitar, like the acoustic guitar, a plurality of strings 4 stretched around the fingerboard 12 of the neck 3 are pressed with one finger and pressed against any one of the plurality of frets 13. By playing the corresponding string 4, it is possible to perform as in the first embodiment.

  At this time, the vibrations of the plurality of strings 4 are detected by the normal pickup unit 6 of the tone detection unit 43, and the pressures caused by the vibrations of the plurality of strings 4 pushed by the pickup unit 26 of the piezo element of the tone detection unit 43 are detected. Each change is detected as musical tone information, and a musical tone is generated based on the detected information.

  That is, when the plurality of strings 4 pressed against the fret 13 are each played, the normal pickup unit 6 detects the vibration of the entire strings 4. When a plurality of strings 4 pressed against the fret 13 are each played, the pair of string height adjusting screws 27 converts the pressure change associated with each vibration of each string 4 into an electrical signal. Output.

  At this time, of the pair of string height adjusting screws 27, distortion is caused by one string height adjusting screw 27 positioned in the direction in which the string 4 is played and the other string height adjusting screw 27 positioned in the opposite direction. Is different. Therefore, as in the first embodiment, the pickup unit 26 differs in potential difference generated inside each of the pair of string height adjusting screws 27, the two different potential differences are mixed, and the mixed potential difference is used as the musical tone information. Output as.

  Then, the CPU 40 causes the sound source unit 44 to use the tone pitch information and the sound generation start information detected by the normal pickup unit 6 and the tone information for each string 4 by each string vibration detected by the pickup unit 26 of the piezo element. A sound source data is generated by giving a command, and musical sound data is generated by the effect unit 45 based on the sound source data and output to an audio device to generate a musical sound. Also at this time, since the electric signal in which different potential differences are mixed by the pair of string height adjusting screws 27 is output from the pickup unit 26, the output signal is enriched, and an effect like a halftone of a guitar can be obtained. .

  If the player places his / her hand on the bridge piece 16 so as not to touch the string 4, as in the first embodiment, the pair of string height adjusting screws 27 picks up the string vibration and bridge piece 16. A DC signal in the direction of sinking is output. For this reason, the waveform signal by string vibration can be used for sound and the DC signal can be used for control. Thus, by applying pressure to the bridge piece 16 to increase the reverb component, changing the cutoff of the filter, or changing the envelope of the sound source if it is a guitar synthesizer, it is impossible to think of a guitar that has never been considered before Performance can be realized.

  As described above, according to this electronic guitar, the same effects as those of the first embodiment are obtained, and the plurality of strings 4 and the plurality of bridge pieces 16 each have conductivity, and the plurality of pickup units 26 are connected to the bridge body. 15 and a plurality of bridge pieces 16, an insulating plate 55, a plurality of conductive plates 56 disposed on the insulating plate 55 and electrically connected to the pair of string height adjusting screws 27, and the plurality of conductive plates. Since the connectors 57 to which the plates 56 are respectively connected and the connection cables 58 connected to the connectors 57 are provided, each pair of string height adjusting screws 27 according to the pressure change accompanying each vibration of the plurality of strings 4 is provided. Each potential difference generated in each can be accurately and reliably extracted as musical tone information.

  That is, in this electronic guitar, as in the first embodiment, the pickup section 26 has a pair of string height adjusting screws 27 made of a piezo material, and the pair of string height adjusting screws 27 is the string support section 24 of the bridge piece 16. In the state where each screw hole 24a is screwed, the lower end portion thereof is pressed against the main body portion 56a of the conductive plate 56, so that each pair of the pair of strings 4 corresponds to the pressure change accompanying each vibration of the plurality of strings 4. Since current due to each potential difference generated in the string height adjusting screw 27 can be caused to flow through the connection cable 58 by each conductive plate 56 and the connector 57, the pressure change associated with each vibration of the plurality of strings 4 can be accurately used as musical sound information. And it can be taken out reliably.

  Also in this case, as in the first embodiment, when the string 4 is played, the pair of string height adjusting screws 27 is opposite to one of the string height adjusting screws 27 located in the direction in which the string 4 is played. Since the distortion is different between the other string height adjusting screw 27 located in the direction and the potential difference generated inside each string height adjusting screw 27 is different, the two different potential differences are mixed, and the mixed potential difference is Since it is output as an electrical signal, the output signal can accurately and reliably detect musical tone information and perform well, and the output signal can be abundant, producing effects like a guitar halftone. .

(Third embodiment)
Next, with reference to FIGS. 10 and 11, a third embodiment in which the present invention is applied to an electronic guitar will be described. In this case, the same parts as those of the second embodiment shown in FIGS.
As shown in FIGS. 10 and 11, this electronic guitar has a pair of conductive plates 60 and 61 on a insulating plate 55 disposed between a bridge body 14 of the bridge portion 5 and a plurality of bridge pieces 15. It is the structure provided corresponding to each bridge | bridging piece 15, and it has the same structure as 2nd Embodiment except this.

  Also in this case, the insulating plate 55 is disposed on the upper surface of the bridge base 18 over almost the entire area, as in the second embodiment. The insulating plate 55 is also provided with a plurality of string insertion holes 55a corresponding to the string insertion holes 18c of the bridge base 18, respectively. On the other hand, the pair of conductive plates 60 and 61 are made of a highly conductive thin metal plate such as copper, and are configured such that the bridge piece 16 is disposed on the upper surface thereof.

  As shown in FIGS. 10 and 11, the pair of conductive plates 60 and 61 are electrically connected by individually contacting the lower ends of the pair of string height adjusting screws 27 of the pickup unit 26 attached to the bridge piece 16. The main body portions 60a and 61a, and the wiring portions 60b and 61b extending from the main body portions 60a and 61a to predetermined locations of the insulating plate 55, that is, locations where the bridge piece 16 does not correspond. The parts 60 b and 61 b are configured to be connected to a connector 62 provided on the lower surface of the insulating plate 55.

  In this case, of the pair of conductive plates 60, 61, one conductive plate 60 has its wiring portion 60b provided on the upper surface of the insulating plate 55 and extended toward the connector 62, as shown in FIG. The extended tip is connected to the connector 62 through a through hole (not shown). The other conductive plate 61 is provided on the lower surface of the insulating plate 55 with each wiring portion 61b being led from the upper surface of the insulating plate 55 to the lower surface of the insulating plate 55 through a through hole (not shown). The leading end is connected to the connector 62.

  In this case, the connector 62 is configured to allow 12 types of signals and ground (reference potential) to pass therethrough. That is, as shown in FIG. 10, the connector 62 is connected to the wiring portions 60b and 61b of the plurality of pairs of conductive plates 60 and 61, respectively. In this state, the bridge base 18 is connected to the bridge base 18 as in the second embodiment. It protrudes to the lower side of the bridge base 18 through the provided insertion hole 18d, and a connecting cable (not shown) is connected to the protruding portion.

  As a result, the pair of conductive plates 60 and 61 respectively corresponding to the plurality of bridge pieces 16 are electrically connected to the electronic circuit unit 7 by connection cables (not shown) connected to the connectors 62 as shown in FIG. By connecting to the electronic circuit unit 7, an electric signal corresponding to a pressure change generated by the pair of string height adjusting screws 27 of the pickup unit 26 is supplied. Also in this case, the pickup unit 26 is configured by a pair of string height adjusting screws 27 made of a piezo material, as in the first embodiment.

  That is, as shown in FIGS. 10 and 11, the pair of string height adjusting screws 27 is screwed into the screw holes 24a of the string support portions 24 of the bridge piece 16, and the lower ends thereof are paired. By being pressed against the main body portions 60a and 61a of the conductive plates 60 and 61, when vibration or pressure is applied to each of the conductive plates 60 and 61, a distortion is generated and a potential difference is generated in each interior. The electric signals are output.

  In this case, as shown in FIGS. 10 and 11, the pair of string height adjusting screws 27 includes one string height adjusting screw 27 positioned in the direction in which the string 4 is played, Since the distortion is different between the other string height adjusting screw 27 located in the opposite direction, the potential difference generated inside each string height adjusting screw 27 is different. The wiring portions 60b and 61b are configured to be output as electrical signals.

  For this reason, two different potential differences respectively generated by the pair of string height adjusting screws 27 are supplied to the electronic circuit unit 7 as electric signals. Thereby, the electronic circuit unit 7 is configured to detect the difference between two different electrical signals and detect the performance direction of the string 4. In this case, the electronic circuit unit 7 is configured to generate a great change in sound quality by adding or subtracting two different electrical signals.

  For example, when two different electrical signals are added, the fundamental sound component is reduced, but the harmonics are increased in proportion, and a sound suitable for clear jazz, acoustic sound, etc. can be obtained. Further, when two different electrical signals are subtracted, the fundamental tone component is doubled, deep distortion is caused to the distortion, a sense of pitch is increased, and a sound suitable for rock or the like can be obtained.

Next, the operation of such an electronic guitar will be described.
When playing with this electronic guitar, like the acoustic guitar, a plurality of strings 4 stretched around the fingerboard 12 of the neck 3 are pressed with one finger and pressed against any one of the plurality of frets 13. By playing the corresponding string 4, it is possible to perform as in the first embodiment.

  At this time, the vibrations of the plurality of strings 4 are detected by the normal pickup unit 6 of the tone detection unit 43, and the pressures caused by the vibrations of the plurality of strings 4 pushed by the pickup unit 26 of the piezo element of the tone detection unit 43 are detected. Each change is detected as musical tone information, and a musical tone is generated based on the detected information. That is, when the plurality of strings 4 pressed against the fret 13 are each played, the normal pickup unit 6 detects the vibration of the entire strings 4.

  In addition, when the plurality of strings 4 pressed against the fret 13 are respectively played, the pair of string height adjusting screws 27 causes the pressure change associated with each vibration of each string 4 to be an electrical signal. Convert and output. At this time, the pair of string height adjusting screws 27 generates a potential difference in each inside according to the pressure change accompanying the vibration of the string 4, and these potential differences are output as musical tone information.

  At this time, when the string 4 is played, the distortion differs between the one string height adjusting screw 27 positioned in the direction in which the string 4 is played and the other string height adjusting screw 27 positioned in the opposite direction. The potential difference generated inside each string height adjusting screw 27 is different, and the two different potential differences are output as electrical signals from the wiring portions 60b and 61b of the conductive plates 60 and 61, respectively.

  The two different electrical signals thus output are detected by the electronic circuit unit 7 to detect the difference between the two electrical signals, thereby detecting the playing direction of the string 4 and adding or subtracting the two different electrical signals. This creates a great change in sound quality. For example, when two different electrical signals are added, the fundamental tone component decreases, but the harmonics increase in proportion, and a sound suitable for clear jazz, acoustic sound, etc. can be obtained. Also, subtracting two different electrical signals doubles the fundamental component, brings deep distortion to the distortion, increases the sense of pitch, and provides a sound suitable for rock and the like.

  Then, the CPU 40 causes the sound source unit 44 to use the tone pitch information and the sound generation start information detected by the normal pickup unit 6 and the tone information for each string 4 by each string vibration detected by the pickup unit 26 of the piezo element. A sound source data is generated by giving a command, and musical sound data is generated by the effect unit 45 based on the sound source data and output to an audio device to generate a musical sound.

  Thus, according to this electronic guitar, in addition to the same effect as in the second embodiment, the plurality of strings 4 and the plurality of bridge pieces 16 are formed of conductive metal, and the plurality of pickup units 26 are An insulating plate 55 disposed between the bridge body 15 and the plurality of bridge pieces 16, and a pair of conductive plates respectively disposed on the insulating plate 55 and individually connected to the pair of string height adjusting screws 27. 60 and 61 and a connector 62 to which each of the pair of conductive plates 60 and 61 is individually connected, so that each pair of string heights is adjusted according to a pressure change accompanying each vibration of the plurality of strings 4 Each potential difference generated in the screw 27 can be accurately and reliably extracted as musical tone information.

  That is, in this electronic guitar, as in the second embodiment, the pickup unit 26 has a pair of string height adjustment screws 27 made of a piezo material, and the pair of string height adjustment screws 27 is the string support portion 24 of the bridge piece 16. Each lower end of each screw hole 24a is pressed against each main body 60a, 61a of the pair of conductive plates 60, 61 in a state of being screwed into each screw hole 24a. Since a current due to each potential difference generated in each pair of string height adjusting screws 27 in accordance with a change in pressure can be caused to flow through a connection cable (not shown) by each pair of conductive plates 60 and 61 and a plurality of connectors 62, a plurality of The pressure change accompanying each vibration of the string 4 can be accurately and reliably extracted as musical tone information.

  In this case, when the string 4 is played, the pair of string height adjusting screws 27 is one string height adjusting screw 27 positioned in the direction in which the string 4 is played and the other string height adjusting screw 27 positioned in the opposite direction. Since the distortion differs between the screw 27, the potential difference generated inside each string height adjusting screw 27 is different, and the two different potential differences are respectively transmitted from the wiring portions 60b and 61b of the conductive plates 60 and 61 as electric signals. Can be output.

  The two different electrical signals thus output can be detected by the electronic circuit unit 7 to detect the difference between the two electrical signals, and the playing direction of the string 4 can be detected, and the two different electrical signals can be added or subtracted. Can produce a great change in sound quality. For example, when two different electrical signals are added, even if the fundamental tone component decreases, the harmonics increase in proportion, so a sound suitable for clear jazz, acoustic sound, etc. can be obtained. Also, subtracting two different electrical signals doubles the fundamental component and can bring deep distortion to the distortion, thus increasing the sense of pitch and obtaining a sound suitable for rock and the like.

  In the first to third embodiments described above, the case where each string height adjusting screw 27 of the pickup unit 26 is formed of a single piezoelectric material is described. For example, the piezoelectric element may be formed in a plate shape, the plate-shaped piezoelectric elements may be stacked, and the stacked structure may be formed into a male screw shape by cutting.

  Further, in each of the first to third embodiments described above, the case where all the string height adjusting screws 27 of the pickup unit 26 are formed of the material of the piezo element has been described. A configuration in which a part of each string height adjusting screw 27 is formed of a piezo element material may be used as in the modification shown. That is, a configuration in which a detection element 65 such as a piezo element is provided below each string height adjusting screw 27 and the detection element 65 is pressed against the bridge body 15 as in the first embodiment may be employed.

  In addition, the detection element 65 such as a piezo element provided at the lower part of each string height adjusting screw 27 is not limited to this, and the conductive plate 55 or the pair of conductive plates 60 and 61 is used as in the second and third embodiments. You may comprise so that it may press on. As described above, even when the detection element 65 such as a piezo element is provided below the string height adjusting screw 27, the same effects as those of the first to third embodiments are obtained.

  Furthermore, in each of the first to third embodiments and the modifications thereof described above, the case where the detection element 65 such as a piezo element is provided on at least a part of the pair of string height adjusting screws 27 of the pickup unit 26 has been described. However, the detection element 65 such as a piezo element is not necessarily required, and a detection element that converts a physical change caused by string vibration into an electric signal and outputs it may be used.

  Furthermore, in each of the first to third embodiments and the modifications thereof described above, a description has been given using a guitar modeled on a synchronized tremolo. This is generally used and has a mechanism that allows the bridge to swing freely, but the present invention is not limited to this configuration. For example, the present invention can be applied to a bridge used in a telecaster type guitar in which the spring member 20 and the pin member 21 are omitted and the bridge base is directly screwed to the guitar body.

  In addition, in each of the first to third embodiments and the modifications thereof described above, the case where the present invention is applied to an electronic guitar has been described. However, the present invention is not necessarily applied to an electronic guitar, such as mandolin, ukulele, and shamisen. It can be widely applied to various electronic stringed instruments.

As mentioned above, although several embodiment of this invention was described, this invention is not restricted to these, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 is a musical instrument main body, a plurality of strings stretched on the musical instrument main body, a bridge main body provided on the musical instrument main body, to which one end of the plurality of strings is attached, A plurality of bridge pieces arranged on the bridge body corresponding to the plurality of strings and supporting the plurality of strings, respectively, and a plurality of bridge pieces supported on the bridge body in a displaceable manner. An electronic stringed musical instrument comprising: a plurality of converters that respectively convert pressure changes applied to the plurality of bridge pieces with each vibration of the plurality of strings into electrical signals and output the electrical signals.

  According to a second aspect of the present invention, in the electronic stringed musical instrument according to the first aspect, the plurality of conversion units include a pair of string height adjusting screws that respectively adjust the string heights of the plurality of strings. An electronic stringed instrument in which at least a part of the string height adjusting screw is formed by a material forming a detection element for detecting a pressure change associated with each vibration of the string by converting it into an electric signal. is there.

  According to a third aspect of the present invention, in the electronic stringed instrument according to the first or second aspect, each of the plurality of strings and the bridge piece has conductivity, and the plurality of conversion units are provided on the bridge body. A plurality of insulating tubes respectively disposed in a plurality of string attachment holes provided, a plurality of conductive portions that respectively conduct to the plurality of strings inserted in the plurality of insulating tubes, and the plurality of conductive portions And a plurality of connection cables respectively connected to the electronic stringed instrument.

  According to a fourth aspect of the present invention, in the electronic stringed instrument according to the second aspect, the plurality of strings and the plurality of bridge pieces each have conductivity, and the plurality of conversion units include the bridge body and the plurality of bridge pieces. An insulating member disposed between the bridge pieces, a plurality of conductive plates disposed on the insulating member and electrically connected to the pair of string height adjusting screws, and a connector to which the plurality of conductive plates are respectively connected. An electronic stringed instrument comprising: a connection portion; and a connection cable connected to the connector portion.

  According to a fifth aspect of the present invention, in the electronic stringed instrument according to the second aspect, the plurality of strings and the plurality of bridge pieces each have conductivity, and the plurality of conversion units include the bridge body and the plurality of bridge pieces. An insulating member disposed between the bridge pieces, a pair of conductive plates respectively disposed on the insulating member and individually connected to the pair of string height adjusting screws, and the pair of conductive plates. An electronic stringed instrument comprising: a connector portion that is individually connected; and a connection cable connected to the connector portion.

DESCRIPTION OF SYMBOLS 1 Guitar main body 2 Trunk part 3 Neck 4 String 5 Bridge part 12 Finger board 13 Fret 15 Bridge main body 16 Bridge piece 26 Pickup part 27 String height adjustment screw 31 String insertion hole 33 Insulation tube 34 Conductive tube 35, 58 Connection cable 50 Conductive layer 55 Insulating plate 56, 60, 61 Conductive plate 57, 62 Connector 65 Detection element

Claims (9)

The instrument body,
A plurality of strings stretched on the instrument body,
A bridge body provided on the instrument body, to which one end of each of the plurality of strings is attached;
A plurality of bridge pieces arranged on the bridge body corresponding to each of the plurality of strings and supporting the plurality of strings,
A plurality of bridge pieces are supported on the bridge body so as to be displaceable, and pressure changes applied to the plurality of bridge pieces in accordance with the vibrations of the plurality of strings are converted into electrical signals and output. A conversion unit;
With
Each of the plurality of strings and the bridge piece has conductivity, and the plurality of conversion portions are a plurality of insulating tubes respectively disposed in a plurality of string attachment holes respectively provided in the bridge main body, and the plurality of the plurality of strings. A plurality of connection cables connected to be electrically connected to each of the plurality of strings inserted in the insulating tube;
An electronic stringed instrument characterized by comprising:   2. The electronic stringed instrument according to claim 1, further comprising: a plurality of conductive portions that are electrically connected to the plurality of strings inserted in the plurality of insulating tubes, wherein the plurality of connection cables are connected to the plurality of conductive portions, respectively. An electronic stringed instrument characterized by that. 2. The electronic stringed instrument according to claim 1, wherein each of the plurality of conversion units includes a plurality of string height adjusting screws for adjusting a string height of the string, and at least a part of each of the string height adjusting screws includes: A detection element for converting the pressure change into an electric signal is formed, and is electrically connected to each of the plurality of string height adjusting screws, and individually transmits an electric signal generated by each of the plurality of string height adjusting screws. An electronic stringed instrument comprising a signal transmission unit.   4. The electronic stringed instrument according to claim 3, wherein the signal transmission unit includes a plurality of conductive plates individually connected to the plurality of string height adjusting screws, and a connector unit to which the plurality of conductive plates are individually connected. An electronic stringed instrument comprising: a connection cable connected to the connector portion. 5. The electronic stringed instrument according to claim 4 , wherein each of the plurality of strings and the plurality of bridge pieces has electrical conductivity, and the plurality of conversion units are disposed between the bridge body and the plurality of bridge pieces. And an insulating member,
The electronic stringed instrument, wherein the plurality of conductive plates are disposed on the insulating member.
2. The electronic stringed instrument according to claim 1, wherein each of the plurality of conversion units includes a plurality of detection elements that detect the pressure change applied to the bridge piece, and the plurality of detection elements are played by the strings. An electronic stringed musical instrument, wherein the electric stringed instrument is arranged so that a potential difference of an electric signal output from each detection element differs depending on a direction.   7. The electronic stringed instrument according to claim 6, wherein potential differences of electrical signals output from the plurality of detection elements are mixed, and the mixed potential difference is output as an electrical signal.   The electronic stringed instrument according to claim 7, wherein the electronic stringed instrument is configured to add and output potential differences of electrical signals output from the plurality of detection elements.   8. The electronic stringed instrument according to claim 7, wherein the electronic stringed instrument outputs a difference between potentials of electrical signals output from the plurality of detection elements.

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