JP2012168236A - String instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a string instrument that is enabled to satisfactorily add effects to musical sounds during performance by reducing any bend deformation of a base member due to the tension of strings.SOLUTION: A string instrument is provided with a base member 3 on whose front and rear faces strings 4 are stretched and a string tension control member 21 that varies the tensions of strings 4 stretched on the rear side reverse to strings 4 on the front side for use in performance out of the strings 4 stretched over this base member 3; therefore, the strings 4 stretched on both front and rear faces of the base member 3 can mutually cancel bending moments arising from the tensions of the strings 4 and working on the base member 3 thereby to reduce any bend deformation of the base member 3 due to the tensions of the strings 4 and, at the same time, by manipulating the string tension control member 21 during performance to vary the pitches of musical sounds, effects can be satisfactorily added to the musical sounds.

Description

  The present invention relates to a stringed instrument such as a guitar, a violin, and a shamisen.

  Conventionally, in a stringed musical instrument such as a guitar, as described in Patent Document 1, a string is stretched on the surface side of a bowl-shaped member called a neck provided in a musical instrument case, and the string is repelled and vibrated. Is configured to play. In such a stringed instrument, a string such as tremolo is used to change the tension of the string on the saddle member in order to perform a bending performance that adds an effect to the musical tone by raising or lowering the pitch during the performance. A tension control member is provided.

JP 2004-361975 A

  However, in such a conventional stringed musical instrument, since the string is stretched only on the surface side of the hook-shaped member, the hook-shaped member is bent and deformed in the longitudinal direction by a bending moment due to the tension of the string. For this reason, it is necessary to increase the rigidity of the hook-shaped member to prevent the hook-shaped member from being bent and deformed due to the tension of the string. The structure of the hook-shaped member is complicated, and it is necessary to use a material having high rigidity. Therefore, there is a problem that the manufacturing cost becomes high.

  In addition, in such a conventional stringed instrument, when performing a bending performance that adds an effect to a musical tone by raising or lowering the pitch during performance, a string tension such as a tremolo provided on the bowl-shaped member is used. By operating the control member, the tension of the string stretched only on the surface side of the hook-shaped member is changed, so that the hook-shaped member is not bent and deformed by the bending moment accompanying the change in tension of the string. Therefore, it is necessary to further increase the rigidity of the bowl-shaped member, which causes a problem that the manufacturing cost is further increased.

  The problem to be solved by the present invention is to provide a stringed instrument that can reduce the bending deformation of a base member such as a bowl-shaped member due to the tension of the string and can effectively add an effect to a musical tone during a performance. That is.

  The present invention provides a base member having strings on both front and back sides, and the tension of the string on the back side located on the opposite side of the string on the front side of the string to be operated. A stringed instrument comprising a string tension control member to be changed.

  According to the present invention, the bending tension due to the tension of the string with respect to the base member can be canceled by the strings stretched on both the front and back sides of the base member, thereby reducing the bending deformation of the base member due to the tension of the string. be able to. For this reason, by operating the string tension control member during the performance, it is possible to change the tension of the string and to effectively add the effect to the musical tone.

It is the front view which showed Embodiment 1 of the stringed musical instrument to which this invention is applied. It is sectional drawing in the AA arrow of the stringed musical instrument shown by FIG. 2 shows each section of the stringed instrument shown in FIG. 2, (a) is an enlarged sectional view taken along the line BB, and (b) is an enlarged sectional view taken along the line CC. It is the front view which showed the string module of the stringed instrument shown in FIG. It is sectional drawing which showed the string module of the stringed instrument shown by FIG. FIG. 6 is an enlarged perspective view of a main part illustrating a string tension device of the string module illustrated in FIG. 5. FIG. 2 is an enlarged back view of a main part showing a state in which a part of a musical instrument case is broken and the string tension control member is viewed from the lower surface side in the stringed instrument shown in FIG. 1. It is an expanded sectional view in the DD arrow of the string tension control member of the stringed musical instrument shown in FIG. FIG. 8 is an enlarged back view illustrating a state in which an operation unit of the string tension control member illustrated in FIG. 7 is operated and a rotating body rotates counterclockwise. FIG. 10 is an enlarged back view showing a state in which the operating portion of the string tension control member shown in FIG. 9 is operated to the opposite side and the rotating body rotates clockwise. It is the front view which showed the string module in Embodiment 2 of the stringed musical instrument to which this invention is applied. It is sectional drawing in the EE arrow of the string module shown by FIG.

(Embodiment 1)
A first embodiment of a stringed musical instrument to which the present invention is applied will be described below with reference to FIGS.
As shown in FIGS. 1 to 3, this stringed musical instrument includes a musical instrument case 1 and a string module 2 that is assembled to the musical instrument case 1. The musical instrument case 1 has a substantially semi-cylindrical shape with an open upper surface, and has a short width (length in a direction perpendicular to the longitudinal direction) on one end side (left end side in FIG. 1) and the other end side (FIG. 1). Then, the width is gradually increased toward the right end side).

  As shown in FIGS. 1 and 2, the string module 2 includes a base member 3, a plurality of strings 4 stretched on both front and back surfaces (upper and lower surfaces in FIG. 2) of the base member, and the plurality of strings. 4 and a plurality of string tension adjusting devices 5 for adjusting the tension force of 4 respectively. The base member 3 is made of a material having high wear resistance and compression resistance, such as a metal such as stainless steel or a ceramic, and the whole is formed in a substantially strip shape.

  That is, as shown in FIGS. 1 and 2, the base member 3 has a short width (length in a direction perpendicular to the longitudinal direction) on one end side (left end side in FIG. 2) and the other end side. It is formed so that its width gradually increases as it goes toward the right end side (in FIG. 2), and is arranged at the upper part in the instrument case 1.

  As shown in FIGS. 4 and 5, the base member 3 has first string support portions 6 and 7 provided at one end portion (left end portion in FIG. 4) so as to protrude vertically, and the other end side. Second string support portions 8 and 9 projecting up and down in the vicinity (near the right end portion side in FIG. 4), and the other end side of the second string support portions 8 and 9 (right end portion side in FIG. 4) ), And a plurality of strings 4 are stretched on both front and back sides (upper and lower sides in FIG. 5) of the base member 3 by the first and second string support parts 6-9. Configured to be passed.

  That is, of the first string support portions 6 and 7, the first string support portion 6 on the front surface side is formed so as to protrude upward from one end portion of the base member 3 as shown in FIG. The first string support portion 7 on the side is formed so as to protrude from one end portion of the base member 3 downward at substantially the same height as the first string support portion 6 on the surface side. Of the second string support portions 8 and 9, the second string support portion 8 on the front surface side is formed so as to protrude upward from the vicinity of the other end portion side of the base member 3, and the second string support portion 8 on the back surface side. The string support portion 9 is formed so as to protrude downward from the vicinity of the other end portion of the base member 3 at substantially the same height as the second string support portion 8 on the surface side.

  In this case, the tip ends (the upper and lower ends in FIG. 5) of the first and second string support portions 6 to 9 may be formed flat, as shown in FIG. In addition, position restricting grooves 6a and 7a for restricting the positions of the strings 4 in the direction orthogonal to the direction in which the strings 4 are stretched, that is, in the arrangement direction of the plurality of strings 4, correspond to the plurality of strings 4, respectively. It may be provided. The position restricting grooves 6a and 7a are preferably formed shallower than the diameter of the string 4.

  Further, as shown in FIGS. 4 and 5, a string pressing member 11 is provided at one end of the base member 3 where the first string support portions 6 and 7 are located. The string presser member 11 includes a presser plate 11a and two screws 11b. The two screws 11b are screwed into one end of the base member 3 to press the presser plate 11a toward the base member 3. Thus, the plurality of strings 4 are pressed by the presser plate 11a.

  Further, as shown in FIGS. 4 and 5, finger plate portions 12 and 13 are provided on both front and back surfaces (upper and lower surfaces in FIG. 5) of the base member 3, respectively. The finger plate portions 12 and 13 are provided from the intermediate portion in the longitudinal direction of the base member 3 to the first string support portions 6 and 7. A plurality of frets 12 a, 13 a are provided at predetermined intervals along the longitudinal direction of the base member 3 on the finger plate portions 12, 13, respectively. The plurality of frets 12a, 13a are formed so that the height thereof is lower than the heights of the first and second string support portions 6-7.

  Further, as shown in FIGS. 4 and 5, the adjusting device mounting portion 10 of the base member 3 is provided at the other end portion (the right end portion in FIG. 4) adjacent to the second string support portions 8 and 9 of the base member 3. An opening 10a in which the plurality of string tension adjusting devices 5 are arranged along the arrangement direction of the plurality of strings 4, and the other end of the opening 10a (the right end in FIG. 4). The plurality of string tension adjusting devices 5 are provided with mounting beam portions 10b that are movably mounted along the longitudinal direction of the base member 3, respectively.

  On the other hand, as shown in FIGS. 4 and 5, the plurality of strings 4 are folded back by the first string support portions 6 and 7 and supported by the first and second string support portions 6 to 9, respectively. Accordingly, the base member 3 is continuously stretched over the front and back both sides (upper and lower sides in FIG. 5). In this case, the plurality of strings 4 are folded back at the first string support portions 6 and 7 by pressing the portions of the string member 4 against one end of the base member 3 by the pressing plate 11a of the string pressing member 11. The portion is configured not to be displaced in the extending direction.

  As shown in FIG. 5, the ends of the plurality of strings 4 are respectively attached to the plurality of string tension devices 5. As shown in FIGS. 4 and 5, the string tensioning device 5 includes a string attachment piece 14 to which both ends of the string 4 are attached, and the string attachment piece 14 for moving along the longitudinal direction of the base member 3. And a string adjusting member 15.

  As shown in FIG. 6, the string attachment piece 14 is formed in a substantially rectangular square bar shape, and has a string locking hole 14 a for locking a fixed portion 4 a which is a ball end provided at one end of the string 4. And a string fixing screw 14b for fixing the other end of the string 4. As shown in FIGS. 4 to 6, the string attachment piece 14 is inserted into the string locking hole 14 a in a state where the string attachment piece 14 is disposed in the opening 10 a of the adjustment device attachment portion 10 of the base member 3. The fixed portion 4a that is a ball end at one end of the string 4 is configured to be locked in the string locking hole 14a.

  Further, as shown in FIGS. 4 to 6, the string attachment piece 14 has a fixed portion 4 a that is a ball end at one end portion of the string 4, and the string 4 is connected to the string locking hole 14 a. 1 and 2 are stretched over the second string support portions 6 to 9, and the other end portion of the stretched string 4 is fixed by a string fixing screw 14 b, whereby the string 4 is attached to both the front and back surfaces of the base member 3. It is configured to stretch in a continuous state on the side.

  As shown in FIGS. 4 to 6, the string adjusting member 15 of the string tensioning device 5 is screwed into a screw shaft 15 a having one end attached to the end of the string attachment piece 14 and the screw shaft 15 a. Two nuts 15b are provided. The screw shaft 15a has an end located on the opposite side to the second string support portions 8 and 9 across the string attachment piece 14 and is provided at the other end portion (the right end portion in FIG. 5) of the base member 3. It is configured to be inserted in a through hole 10 c provided in the mounting beam portion 10 b of the device mounting portion 10 so as to be movable along the longitudinal direction of the base member 3.

  In this case, as shown in FIG. 4 and FIG. 5, the screw shaft 15 a has an axial center on each extension of the plurality of strings 4 and in the vertical direction of the base member 3 at a location corresponding to each of the plurality of strings 4. It is configured to be located on the extension of each center line M of the base member 3 passing through the intermediate point of the thickness along the longitudinal direction of the base member 3, and to move along the extension line of the center line M.

  As shown in FIGS. 4 to 6, the two nuts 15 b are located on the inside of the attachment beam portion 10 b of the tension adjusting device attachment portion 10 on the string attachment piece 14 side and on the opposite side of the string attachment piece 14. The string attachment piece 14 is fixed in the opening 10a of the tension adjusting device attachment portion 10 by being screwed into the screw shaft 15a and sandwiching the attachment beam portion 10b in a state of being located on both sides of the outside. It is configured.

  In other words, the string adjusting member 15 has one nut 15b screwed into the screw shaft 15a in advance, and in this state, the screw shaft 15a is inserted into the through hole 10c of the mounting beam portion 10b of the tension adjusting device mounting portion 10. By tightening another nut 15b from the outside of the mounting beam portion 10b to the inserted screw shaft 15a and tightening, the string mounting piece 14 is moved away from the second string support portions 8 and 9, and the string 4 is pulled. It is configured as follows.

  The string adjusting member 15 is a state in which the nut 15b located outside the mounting beam portion 10b is tightened and the string 4 is stretched over the first and second string support portions 6 to 9 with a predetermined tension. Then, by tightening the nut 15b located inside the mounting beam portion 10b and sandwiching the mounting beam portion 10b with the two nuts 15b, the string mounting piece 14 is fixed in the opening 10a of the tension adjusting device mounting portion 10. The tension of the string 4 is kept constant.

  As a result, the string tension device 5 is attached to the tension adjusting device mounting portion 10 in a state where the string mounting piece 14 is fixed in the opening 10a of the tension adjusting device mounting portion 10 and the tension of the string 4 is kept constant. When the nut 15b located outside the beam portion 10b is loosened, the screw shaft 15a and the string attachment piece 14 move toward the second string support portions 8 and 9, and the tension of the string 4 is loosened and lowered. When the nut 15b located outside is tightened, the screw shaft 15a and the string attachment piece 14 move away from the second string support portions 8 and 9, and the tension of the string 4 is increased, thereby adjusting the tension of the string 4 It is configured to perform so-called tuning.

Here, the bending moment applied to the base member 3 by the tension of the string 4 will be described.
The base member 3 is provided with first string support portions 6 and 7 protruding at substantially the same height on the front and back sides (up and down in FIG. 5) at one end portion, and second string support portions 8 and 9 at the other end portion side. Are protruded on the front and back at substantially the same height, and between the front ends of the first and second string support portions 6 and 8 on the front surface side (upper surface side in FIG. 5) and on the rear surface side (lower surface side in FIG. 5). Since the string 4 is stretched between the tips of the first and second string support portions 7 and 9, the bending moment applied to the base member 3 by the tension of the string 4 is offset, and the tension of the string 4 Only the compression force due to is applied to the base member 3.

  In this case, the string 4 is folded back by the first string support portions 6 and 7, and both end portions thereof are located on the second string support portions 8 and 9 side, whereby the first and second string support portions 6. 9 to 9, and the both ends of the string 4 are pulled by the string tensioning device 5 in this state, so that the first and second string support parts 6, 8 on the surface side and The tension of the string 4 stretched between the tips of the first and second string support portions 7 and 9 on the back side becomes the same, and this also causes the bending moment applied to the base member 3 by the tension of the string 4 Has been offset.

  The string tensioning device 5 for adjusting the tension of the string 4 includes a screw shaft 15a of the string adjusting member 15 for moving the string attachment piece 14 to which both ends of the string 4 are attached along the stretch direction of the string 4. Each center of the base member 3 that passes along the longitudinal direction of the base member 3 on the extension of the plurality of strings 4 and passes through the intermediate point of the thickness in the vertical direction of the base member 3 at locations corresponding to the plurality of strings 4 respectively. By being located on the extension of the line M and moving along the extension of the center line M, bending deformation of the base member 3 due to the bending moment applied to the base member 3 is prevented.

  The string module 2 has a base member 3 screwed into the instrument case 1 as shown in FIGS. That is, as shown in FIG. 2, a plurality of mounting bosses 16 are provided on the bottom of the instrument case 1 along the longitudinal direction of the instrument case 1 in a state of being opened to the lower side of the instrument case 1. In the string module 2, the base member 3 on which the plurality of strings 4 are stretched is disposed on the plurality of mounting bosses 16 of the instrument case 1, and in this state, inserted into the mounting bosses 16 from the lower side of the instrument case 1. The screw 17 is screwed into the base member 3 to be attached in the musical instrument case 1.

  Thereby, as shown in FIGS. 1 and 2, the string module 2 has the string 4 positioned on the surface side of the base member 3 protruding and exposed to the upper surface side of the instrument case 1, and the first string in the base member 3 is exposed. One end portion where the support portions 6 and 7 are located is covered with the front end surface of the musical instrument case 1, and the adjusting device mounting portion 10 and the string tension adjusting device 5 located at the other end portion of the base member 3 are arranged on the upper surface side of the musical instrument case 1. The other end is exposed and attached to the instrument case 1 in this state. For this reason, this stringed instrument is configured so that the tension of the string 4 can be adjusted by the string tension adjusting device 5 with the string module 2 attached to the instrument case 1.

  1 and 2, the instrument case 1 includes a string vibration detection unit 18 for detecting vibrations of the plurality of strings 4 in the string module 2, and the second string support portion 8 of the base member 3. , 9 are attached by screws 18a so as to cross the lower side of the plurality of strings 4 located at the positions adjacent to. The string vibration detection unit 18 includes a plurality of pickups 20 that respectively detect vibrations of the plurality of strings 4 stretched over the base member 3.

  The plurality of pickups 20 are a magnetic sensor that detects vibration of the string 4 by magnetic force, an optical sensor that optically detects vibration of the string 4, and the like, and is arranged corresponding to each of the plurality of strings 4. The string vibration detection unit 18 includes an external connection terminal 19. The external connection terminal 19 is electrically connected to an external speaker unit (not shown) via a connection cable 19 a and is detected by each pickup 20. Based on the electrical signal, the external speaker unit is configured to emit a musical sound corresponding to the vibration of each string 4.

  By the way, in the string module 2 incorporated in the musical instrument case 1, as shown in FIG. 2, each tension of the plurality of strings 4 located on the back surface side (the lower surface side in FIG. 2) of the base member 3 is changed. The string tension control member 21 is provided. As shown in FIGS. 7 and 8, the string tension control member 21 is rotatably attached to the back surface of the base member 3 and holds the plurality of strings 4 so as to be slidable. And an operation unit 23 for rotating the operation 22.

  As shown in FIG. 2, the rotating body 22 can be rotated by a screw shaft 24 at a position located between the string vibration detection unit 18 and the finger plate portion 13 on the back surface side (the lower surface side in FIG. 2) of the base member 3. And is configured to rotate parallel to the back surface of the base member 3. In this case, as shown in FIG. 8, a screw hole 3 a into which the screw shaft 24 is screwed is formed in the base member 3 so as to penetrate the front and back surfaces (upper and lower surfaces in FIG. 8) of the base member 3. Further, as shown in FIGS. 7 and 8, the lower surface of the rotating body 22 has string insertion grooves 22a into which the plurality of strings 4 stretched on the back surface side of the base member 3 are slidably inserted. Each is provided in parallel with the string 4.

  As shown in FIGS. 7 and 8, the operation portion 23 has one end portion provided on the side surface of the rotating body 22 and the other end portion provided through the notch portion 1 b provided on the side surface portion of the instrument case 1. The rotating body 22 is configured to rotate by operating the protruding portion. In this case, as shown in FIG. 7, the distal end of the operation portion 23 protruding outward from the instrument case 1 is provided with two pressing portions 23a and 23b which are divided into two portions, and thereby the whole is formed in a substantially Y-shape. Has been.

  As a result, the string tension control member 21 protrudes outward from the instrument case 1 with each string 4 inserted into the plurality of string insertion grooves 22a of the rotating body 22, as shown in FIGS. When one of the two pressing portions 23a and 23b in the operating portion 23 is pressed toward the side surface of the musical instrument case 1, the rotating body 22 rotates counterclockwise as shown in FIG. The plurality of strings 4 are bent, and the tension of each string 4 is changed.

  Further, as shown in FIGS. 7 and 8, the string tension control member 21 is configured such that the other pressing portion 23b of the two pressing portions 23a and 23b in the operation portion 23 protruding outside from the instrument case 1 is the instrument case. When pressed toward the side surface of 1, the rotating body 22 rotates clockwise to bend each of the plurality of strings 4 and change the tension of each string 4 as shown in FIG. Has been.

Next, the case of performing with such a stringed instrument will be described.
At this time, first, the tension of each string 4 is adjusted by the plurality of string tension devices 5. That is, the inner nut 15b located on the string attachment piece 14 side of the string tension device 5 is loosened, and the nut 15b located outside the attachment beam portion 10b of the adjustment device attachment portion 10 in the base member 3 is tightened or loosened. Then, the tension of the string 4 is adjusted, and the string 4 is tuned.

  At this time, the string tension control member 21 attached to the back surface (the lower surface in FIG. 2) of the base member 3 is in a neutral state (neutral state). That is, in the string tension control member 21, each string 4 is inserted into each of the plurality of string insertion grooves 22a provided in the rotating body 22. Therefore, each string insertion groove 22a is changed to each string by the tension of each string 4. The rotating body 22 rotates about the screw shaft 24 so as to be parallel to the spanning direction of 4. Thereby, the string tension control member 21 will be in a neutral state (neutral state).

  In this state, when the performer holds the instrument case 1 and performs with one hand (for example, the left hand), the instrument case 1 corresponding to the fingerboard portions 12 and 13 is held and exposed from the instrument case 1. While pressing one of the strings 4 on any fret 12a of the fingerboard part 12, the other hand (for example, the right hand) claws the plurality of strings 4 exposed from the musical instrument case 1. As a result, each string 4 vibrates, the vibration of the string 4 is detected by each pickup 20 of the string vibration detection unit 18, and a musical sound is emitted from a speaker unit (not shown) based on the detected signal. The

  At this time, when performing a bending performance in which the pitch of the musical tone is changed to add an effect to the musical tone, the two presses divided into two forks in the operation portion 23 of the string tension control member 21 projecting outside the instrument case 1 are used. The parts 23a and 23b are pressed against a part of the body such as the thigh and flank of the performer, and the operation part 23 is operated by shaking the body in this state to rotate the rotating body 22 of the string tension control member 21. . Then, the plurality of strings 4 are bent by the string insertion groove 22a of the rotating body 22, and the tension of each string 4 changes. Thereby, an effect can be added to the musical sound by changing the pitch of the musical sound.

  For example, when one pressing portion 23a is pressed toward the side surface of the musical instrument case 1 out of the two pressing portions 23a and 23b in the operation portion 23 protruding outward from the musical instrument case 1, as shown in FIG. The rotating body 22 rotates counterclockwise to bend each of the plurality of strings 4 and change the tension of each string 4. Thereby, an effect can be added to the musical sound by changing the pitch of the musical sound.

  Moreover, when the other pressing part 23b is pressed toward the side surface of the musical instrument case 1 out of the two pressing parts 23a and 23b in the operation part 23 protruding outward from the musical instrument case 1, as shown in FIG. The rotating body 22 rotates clockwise to bend each of the plurality of strings 4 and change the tension of each string 4. Thereby, an effect can be added to the musical sound by changing the pitch of the musical sound.

  As a result, in this stringed instrument, one hand (for example, the left hand) holds the portion of the musical instrument case 1 corresponding to the finger plate portions 12 and 13, and each fret 12a of the finger plate portion 12 exposed from the musical instrument case 1 While holding one of the strings 4 and playing with the other hand (for example, the right hand) clawing a plurality of strings 4 exposed from the instrument case 1, the string tension control can be performed without using any of the hands. The operation part 23 of the member 21 can be operated with a part of the body such as the thigh and the flank of the performer to change the pitch of the musical sound and add an effect to the musical sound.

  By the way, in this stringed musical instrument, a plurality of strings 4 stretched on both front and back sides of the base member 3 can be used by being reversed. At this time, the string module 2 is removed from the instrument case 1, the string tension control member 21 attached to the back surface (the lower surface in FIG. 5) of the base member 3 of the removed string module 2 is removed, and the removed string tension control member is removed. 21 is attached to the surface of the base member 3 (the upper surface in FIG. 5).

  That is, the screw shaft 24 of the string tension control member 21 is loosened to remove the rotating body 22 from the lower surface of the base member 3 together with the screw shaft 24, and the removed rotating body 22 faces the upper surface of the base member 3 and the upper surface. Each of the strings 4 on the surface side of the base member 3 is inserted into the plurality of string insertion grooves 22 a provided in the rotating body 22 by being inserted between the strings 4, and in this state, the screw shaft 24 is screwed into the screw of the base member 3. The rotary body 22 is screwed into the hole 3a (see FIG. 8) from above, and the rotary body 22 is rotatably attached to the upper surface of the base member 3 by the screw shaft 24.

  In this way, the string module 2 to which the string tension control member 21 is attached is turned upside down and assembled to the musical instrument case 1 so that the plurality of strings 4 stretched on both sides of the base member 3 can be easily reversed. be able to. Thus, even if the string module 2 is turned upside down, it is possible to perform well, and during the performance, the operation part 23 of the string tension control member 21 is operated by a part of the body such as the player's thigh or flank. Thus, it is possible to add an effect to the musical tone by changing the pitch of the musical tone.

  Thus, according to this stringed musical instrument, the base member 3 with the strings 4 stretched on both the front and back sides, and the string 4 stretched on the base member 3 is opposite to the surface-side strings 4 on which the performance operation is performed. And the string tension control member 21 for changing the tension of the string 4 on the back side located at the position of the base member 3 can be reduced due to the tension of the string 4, and the string tension control can be performed during the performance. By operating the member 21, it is possible to change the pitch of the musical sound and add a good effect to the musical sound, thereby making it possible to perform a good bending performance.

  That is, in this stringed instrument, the bending moment due to the tension of the string 4 with respect to the base member 3 can be canceled by the strings 4 stretched on both the front and back sides of the base member 3, thereby Since the bending deformation can be reduced, it is possible to perform well, and by operating the string tension control member 21 during performance, the tension of the string 4 is changed and the effect is favorably added to the musical tone. This makes it possible to perform a good bending performance.

  In this case, the string tension control member 21 includes a rotating body 22 that is rotatably attached to the base member 3 and holds the string 4, and an operation unit 23 for rotating the rotating body 22. By simply operating the operation unit 23, the rotating body 22 can be rotated, and the string 4 can be bent according to the rotation of the rotating body 22, so that the tension of the string 4 can be easily changed, The pitch can be changed satisfactorily, thereby adding an effect to the musical tone.

  The rotating body 22 has a string insertion groove 22a into which the string 4 stretched on the back surface side of the base member 3 is slidably inserted, and on the back surface side of the base member 3 where the string 4 is stretched. Since the rotary body 22 rotates in parallel with the operation unit 23, the string insertion groove 22a is rotated in a direction intersecting with the stringing direction in accordance with the rotation of the rotary body 22. Since the string 4 can be reliably bent according to the rotation of the string insertion groove 22a, the tension of the string 4 can be changed easily and satisfactorily.

  Further, in this stringed instrument, the strings 4 are continuously stretched on both the front and back sides of the base member 3, so that when the strings 4 are stretched across the front and back sides of the base member 3, the front and back sides of the base member 3 The tension of the string 4 can be made uniform. For this reason, the bending moment which arises in the base member 3 by the tension | tensile_strength of the string 4 each tensioned on the front and back both sides of the base member 3 can be canceled reliably, and, thereby, the bending deformation of the base member 3 due to the tension of the string 4 is prevented. Can be further reduced.

(Embodiment 2)
Next, a second embodiment of the stringed musical instrument to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
As shown in FIGS. 11 and 12, the stringed musical instrument is provided on both the front and back surfaces of the base member 3, while the string 30 is independently stretched between the front and back surfaces of the base member 3 of the string module 2. Of the fingerboard portions 31 and 32, one fingerboard portion 31 has a configuration different from that of the first embodiment, and the other configuration is substantially the same as that of the first embodiment.

  In this case, at one end portion (left end portion in FIG. 12) located on the first string support portions 6 and 7 side of the base member 3, as shown in FIG. The upper and lower sides are provided in a state corresponding to the strings 30. Further, among the plurality of strings 30, an engaging portion 30 a is provided at one end portion (left end portion in FIG. 12) of each string 30 that extends over the surface side (upper surface side in FIG. 12) of the base member 3. An engaging portion 30b is provided at one end portion (left end portion in FIG. 12) of each string 30 that is stretched over the back surface side (lower surface side in FIG. 12) of the base member 3.

  As a result, each string 30 stretched to the surface side (upper surface side in FIG. 12) of the base member 3 has each engaging portion 30a at its one end portion (left end portion in FIG. 12) as shown in FIG. The first and second string support portions that are respectively locked to the upper string locking portions 33 at one end portion (left end portion in FIG. 12) of the base member 3 and are located on the surface side of the base member 3 in this state. 6 and 8, the other end portions thereof (the right end portion in FIG. 12) are respectively fixed to the string attachment pieces 14 of the string tensioning devices 5 by the string fixing screws 14 b as in the first embodiment. Thus, the base member 3 is configured to be stretched over the surface side (the upper surface side in FIG. 12).

  Each string 30 stretched to the back surface side (the lower surface side in FIG. 12) of the base member 3 has each engaging portion 30a at its one end portion (left end portion in FIG. 12) as shown in FIG. Each fixed portion 4a, which is a ball end of each other end portion (right end portion in FIG. 12), is inserted into each string attachment hole 14a of each string attachment piece 14 of the string pulling device 5, and each string attachment piece 14 has each ball end. After being placed in the first and second string support portions 7 and 9 located on the back surface side of the base member 3 in this state, they are respectively locked in the string locking holes 14a, and then each one end portion (the left end in FIG. 12). Are engaged with the lower string locking portions 34 at one end portion (left end portion in FIG. 12) of the base member 3, respectively, so that the back surface side of the base member 3 (FIG. 12). Then, it is configured to be stretched over the lower surface side).

  As described above, the plurality of strings 30 that are independently arranged on both the front and back sides of the base member 3 are tightened on the nuts 15b of the string tensioning devices 5 in the same manner as in the first embodiment. Are moved away from the second string support portions 8 and 9, and the strings 30 on the front and back sides of the base member 3 are pulled to keep the tension of the strings 30 constant as shown in FIG. In a leaned state, the base member 3 is configured to be stretched over both front and back sides.

  For this reason, also in the string module 2 of the second embodiment, the tension of the plurality of strings 30 stretched on both the front and back sides of the base member 3 is the same, and the tension of the plurality of strings 30 adds to the base member 3. The bending moment is canceled, and only the compressive force due to the tension of the plurality of strings 30 is applied to the base member 3, so that the bending deformation of the base member 3 due to the tension of the plurality of strings 30 is prevented.

  On the other hand, finger plate portions 31 and 32 provided respectively on the front and back surfaces of the base member 3 are provided from the intermediate portion in the longitudinal direction of the base member 3 to the first string support portions 6 and 7 as in the first embodiment. ing. Among the finger plate portions 31 and 32, the finger plate portion 32 located on the back surface side (the lower surface side in FIG. 12) of the base member 3 has a plurality of frets 32a corresponding to the respective strings 30 as in the first embodiment. The base member 3 is provided at predetermined intervals along the longitudinal direction. The plurality of frets 32a are formed so that the height thereof is lower than the heights of the first and second string support portions 6-7.

  Further, as shown in FIG. 12, the finger plate portion 31 located on the front surface side (upper surface side in FIG. 12) of the base member 3 is one of the plurality of strings 30 stretched above. A plurality of frets 31a are provided at predetermined intervals along the longitudinal direction of the base member 3 only at the locations corresponding to, but other locations corresponding to the strings 30 are formed on the flat portion 31b having the same height as the frets 31a. Is formed. That is, the fingerboard portion 31 has a configuration in which a location where a plurality of frets 31a are provided and a location where the frets 31a are not provided are mixed.

Next, the case of performing with such a stringed instrument will be described.
Also in this case, first, the tension of each string 30 is adjusted by the plurality of string tension devices 5. That is, the inner nut 15b located on the string attachment piece 14 side of the string tension device 5 is loosened, and the nut 15b located outside the attachment beam portion 10b of the adjustment device attachment portion 10 in the base member 3 is tightened or loosened. Then, the tension of the string 30 is adjusted, and the string 30 is tuned.

  Also at this time, the string tension control member 21 attached to the back surface (the lower surface in FIG. 12) of the base member 3 has the strings 4 inserted into the plurality of string insertion grooves 22a provided in the rotating body 22, respectively. Therefore, as in the first embodiment, the rotating body 22 rotates about the screw shaft 24 so that the string insertion grooves 22a are parallel to the spanning direction of the strings 30 by the tension of the strings 30. Thereby, the string tension control member 21 will be in a neutral state (neutral state).

  In this state, when the performer holds the musical instrument case 1 and performs it, as in the first embodiment, one hand (for example, the left hand) holds the portion of the musical instrument case 1 corresponding to the fingerboard portions 31 and 32. While holding one of the strings 30 against the fingerboard 31 exposed from the instrument case 1, the other hand (for example, the right hand) claws the plurality of strings 30 exposed from the instrument case 1.

  In this case, the fingerboard portion 31 of the base member 3 corresponding to the string 30 exposed from the musical instrument case 1 has a mixture of a location where the plurality of frets 31a are provided and a location where the frets 31a are not provided. Because of the configuration, the performer performs by using properly a place with the fret 31a and a place without the fret 31a. In this way, each string 30 vibrates, the vibration of the string 30 is detected by each pickup 20 of the string vibration detection unit 18, and a musical sound is emitted from a speaker unit (not shown) based on the detected signal. Sounded.

  Further, at this time, when performing a bending performance in which the pitch of the musical tone is changed to add an effect to the musical tone, as in the first embodiment, the operating portion of the string tension control member 21 protruding outside the instrument case 1 is used. The two pressing portions 23a and 23b divided into two forks in 23 are pressed against a part of the body such as the thigh and flank of the performer, and the operation portion 23 is operated by shaking the body in this state to control the string tension. The rotating body 22 of the member 21 is rotated. Then, the plurality of strings 30 are bent by the string insertion groove 22a of the rotating body 22, and the tension of each string 30 changes. Thereby, an effect can be added to the musical sound by changing the pitch of the musical sound.

  By the way, also in this stringed instrument, as in the first embodiment, a plurality of strings 30 stretched on the both sides of the base member 3 can be used by being reversed. Also at this time, the string module 2 is removed from the instrument case 1, the string tension control member 21 attached to the back surface (the lower surface in FIG. 12) of the base member 3 of the removed string module 2 is removed, and the removed string tension is removed. The control member 21 is attached to the surface of the base member 3 (upper surface in FIG. 12).

  In this way, the string module 2 to which the string tension control member 21 is attached is turned upside down and assembled to the musical instrument case 1 so that the plurality of strings 30 stretched on both sides of the base member 3 can be easily reversed. be able to. When the string module 2 is turned upside down as described above, the fingerboard portions 31 and 32 provided on the front and back surfaces of the base member 3 are turned upside down, and a plurality of frets 32a respectively corresponding to the strings 30 are formed on the base member. The normal fingerboard portions 32 provided at predetermined intervals along the longitudinal direction 3 are located on the surface side of the musical instrument case 1.

  For this reason, when the string module 2 according to the second embodiment is turned upside down and assembled to the musical instrument case 1, a normal fingerboard unit 32 is pressed while pressing any one of the strings 4. Can play. Thus, even if the string module 2 is turned upside down, it is possible to perform well as in the first embodiment, and during the performance, the operation unit 23 of the string tension control member 21 can be used for the player's thighs, flank, etc. An effect can be added to a musical sound by operating it with a part of the body and changing the pitch of the musical sound.

  As described above, according to this stringed instrument, in addition to the same effects as in the first embodiment, the plurality of strings 30 are independently stretched on both the front and back sides of the base member 3. The bending moment generated in the base member 3 due to the tension of each string 30 stretched on both the front and back surfaces can be surely offset. For this reason, as in the first embodiment, the bending deformation of the base member 3 due to the tension of the string 30 can be reduced, and the tension of the string 30 stretched on both the front and back sides of the base member 3 can be made uniform. it can.

  Further, according to this stringed musical instrument, the fingerboard portions 31 and 32 provided on the front and back surfaces of the base member 3 are different, and the fingerboard portion 32 on the back surface side has a plurality of frets 32a corresponding to the strings 30. Since the fingerboard portion 31 on the front side has a configuration in which a portion having a fret 31a corresponding to a specific string 30 and a portion without a fret are mixed, the player can be turned upside down by reversing the base member 3 front and back. The fingerboard portions 31 and 32 can be selected according to the user's preference and performance form, thereby widening the performance range.

  In the first and second embodiments described above, the rotating body 22 of the string tension control member 21 is rotatably attached to the base member 3 by the screw shaft 24, and is in a neutral state (neutral state) by the tension of the plurality of strings 4 and 30. However, the present invention is not limited to this. For example, the rotating body 22 is installed with a load applied in advance by an urging member such as a spring member and rotated by a predetermined angle, and bending is performed. When performing, the rotary body 22 may be rotated to lower the tension of the plurality of strings 4 and 30, thereby changing the pitch to lower and adding an effect to the musical sound.

  In the first and second embodiments described above, the case where the present invention is applied to a guitar-type stringed instrument in which six strings 4 and 30 are stretched on the front and back sides of the base member 3 has been described. Only one or four or 30 may be stretched, three may be stretched, or six or more may be stretched. Therefore, the stringed instrument of the present invention can be applied not only to guitars but also to stringed instruments such as ukulele, mandolin, violin, cello, etc., and can also be widely applied to stringed instruments such as shamisen, koto, and koto.

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)
According to the first aspect of the present invention, there is provided a base member in which strings are stretched on both sides of the front and back surfaces, and a back surface side of the strings stretched on the base member that is located on the opposite side of the string on the front surface side where the performance operation is performed. And a string tension control member that changes the tension of the string.

  According to a second aspect of the present invention, in the stringed instrument according to the first aspect, the string tension control member is rotatably attached to the base member to hold the string, and the rotary body is rotated. A stringed instrument characterized by comprising an operation unit for performing the operation.

  According to a third aspect of the present invention, in the stringed instrument according to the second aspect, the rotating body has a string insertion groove into which the string stretched on the back surface side of the base member is slidably inserted. It is a stringed instrument that rotates in parallel with the back surface of the base member at a place where the string is stretched.

  According to a fourth aspect of the present invention, in the stringed musical instrument according to any one of the first to third aspects, the string is continuously stretched on both front and back sides of the base member. It is.

  According to a fifth aspect of the present invention, in the stringed musical instrument according to any one of the first to third aspects, the strings are stretched independently on both front and back sides of the base member. It is a stringed instrument.

DESCRIPTION OF SYMBOLS 1 Musical instrument case 2 String module 3 Base member 4, 30 String 5 String tension device 6, 7 1st string support part 8, 9 2nd string support part 12, 13, 31, 32 Finger board part 14 String attachment piece 15 Adjustment member 18 String vibration detection unit 21 String tension control member 22 Rotating body 22a String insertion groove 23 Operation unit 24 Screw shaft

Claims (5)

A base member with strings on both front and back sides;
A stringed instrument comprising: a string tension control member that changes a tension of a string on the reverse side located on the opposite side of the string on which the performance operation is performed among the strings stretched on the base member. .   2. The stringed instrument according to claim 1, wherein the string tension control member includes a rotating body that is rotatably attached to the base member and holds the string, and an operation unit that rotates the rotating body. A stringed instrument characterized by   The stringed musical instrument according to claim 2, wherein the rotating body has a string insertion groove into which the string stretched on the back surface side of the base member is slidably inserted, and the string is stretched at a place where the string is stretched. A stringed instrument that rotates parallel to the back surface of the base member.   The stringed instrument according to any one of claims 1 to 3, wherein the string is continuously stretched on both front and back sides of the base member. The stringed instrument according to any one of claims 1 to 3, wherein the strings are stretched independently on both front and back sides of the base member.

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