JP3577428B2

JP3577428B2 - Double string structure of stringed instruments

Info

Publication number: JP3577428B2
Application number: JP13441699A
Authority: JP
Inventors: 紀夫横内
Original assignee: 紀夫横内
Priority date: 1999-05-14
Filing date: 1999-05-14
Publication date: 2004-10-13
Anticipated expiration: 2019-05-14
Also published as: JP2000322054A

Description

【０００１】
【発明の属する技術分野】
この発明は、弦鳴楽器に関し、特に弦鳴楽器の複弦構造に関する。
【０００２】
【従来の技術】
例えば、図１８に示すマンドリン８０や図示しない１２弦ギターに代表される複弦の弦鳴楽器は、２本一対の弦で単一の音階を鳴らすようにされたものである。この種複弦構造を有する弦鳴楽器にあっては、図１９のように、各弦８１をそれぞれ一本ずつ楽器の胴部８２後端の弦留め８３に固定し、ヘッド部の弦巻８４で各弦８１の張力を調整して、２本一対の弦８１Ａ，８１Ｂ，８１Ｃ，８１Ｄとして音調される。
【０００３】
しかるに、前記構造の弦鳴楽器にあっては、各弦８１が独立して弦留め８３と弦巻８４の間に張設されているものであるから、調弦に際しては２本一対の弦８１Ａ，８１Ｂ，８１Ｃ，８１Ｄの各弦８１の張力をそれぞれ微妙に調整しなければならない。
【０００４】
また、演奏中に一対に音調した２本の弦８１Ａ，８１Ｂ，８１Ｃ，８１Ｄのいずれかの弦８１の張力が変動する（緩む）ことがあるが、このような場合には一対に音調した２本の弦８１Ａ，８１Ｂ，８１Ｃ，８１Ｄに音程の狂いが生じ、音色が濁ってしまって演奏上好ましくない。
【０００５】
【発明が解決しようとする課題】
この発明は前記の点に鑑みなされたもので、２本一対の弦を常に同じ張力で保持する構造とすることにより、２本一対の弦の音調を簡単確実に調整でき、かつ演奏中にも常に同じ音程に保つことができる弦鳴楽器の複弦構造を提供するものである。
【０００６】
【課題を解決するための手段】
すなわち、請求項１の発明は、２本一対の弦で単一の音階を鳴らす複弦構造を有する弦鳴楽器において、前記一対の弦は単一の弦よりなり、ヘッド部側で前記単一の弦の両端部がそれぞれ弦巻に調弦可能に巻着されてなるとともに、胴部側で滑軸部材又は滑車部材若しくはベアリング部材からなる保持部においてループ状に連続し引張自在に周回保持されていることを特徴とする弦鳴楽器の複弦構造に係る。
【０００７】
また、請求項２の発明は、２本一対の弦で単一の音階を鳴らす複弦構造を有する弦鳴楽器において、前記一対の弦の各弦はヘッド部側で各端部がそれぞれ弦巻に調弦可能に巻着されてなるとともに、胴部側で各端部が中央部に軸部を有する回動部材の軸部の両側に引張自在に取り付けられていることを特徴とする弦鳴楽器の複弦構造に係る。
【０００８】
【発明の実施の形態】
以下添付の図面に従ってこの発明を詳細に説明する。
図１は請求項１の発明の一実施例に係るマンドリンの斜視図、図２は保持部として滑軸部材を用いた例を示す部分拡大斜視図、図３は同じく保持部として滑車部材を用いた例を示す部分拡大斜視図、図４はさらに保持部としてベアリング部材を用いた例を示す部分拡大斜視図、図５は保持部の取付構造を示す側面図、図６は保持部の取付構造の他の例を示す側面図、図７は保持部の取付構造の他の例を示す背面図、図８はベアリング部材よりなる保持部の斜視図、図９は図８の保持部の取付構造を示す部分断面図、図１０は駒に保持部を設けた例を表す部分断面図、図１１はその上面図、図１２は駒に保持部を設けた別の例を示す部分断面図、図１３は請求項２の発明の実施例を示す平面図、図１４は図１３のＸ−Ｘ線の断面図、図１５はヘッド部側に保持部を進退自在に設けた例を示す要部の平面図、図１６は図１５のＹ−Ｙ断面図、図１７はヘッド部側の保持部の別の例を示す平面図である。
【０００９】
図１に示すマンドリン１０は、２本一対の弦で単一の音階を鳴らす複弦構造の弦鳴楽器の一例として挙げるもので、従来技術の項で説明したものと略同様の外観を有する。マンドリン１０は胴部１１とネック部１２とヘッド部１３及び弦２０からなり、弦２０は２本一対の弦２１，２２，２３，２４で単一の音階を鳴らすようになっている。図において、符号１４は響板、１５は響孔、１６は振動板、１７は駒、１８は弦巻、１９はそのつまみである。
【００１０】
この発明の弦鳴楽器（マンドリン）１０にあっては、前記一対の弦２１，２２，２３，２４の一側の端部（図１の例では胴部１１側）がそれぞれ連続していて、対となる一方の弦（２０Ａ）の張力と他方の弦（２０Ｂ）の張力とが一定に保たれるようにしたことを特徴とするものである。
【００１１】
前記構造の一例として、請求項１に規定し図示するように、前記一対の弦２１，２２，２３，２４はそれぞれ単一の弦よりなり、ヘッド部１３側で前記単一の弦の両端部がそれぞれ弦巻１８に調弦可能に巻着されてなるとともに、胴部１１側で滑軸部材３０又は滑車部材３５若しくはベアリング部材４０からなる保持部においてループ状２０Ｃに連続し引張自在に周回保持された構造が開示される。図２は滑軸部材３０からなる保持部を示し、符号３１はその保持溝である。一対の弦２１，２２，２３，２４はそれぞれ単一の弦からなり、保持部３０において引張自在に周回保持されるものであるから、弦巻１８のつまみ１９を回して調弦することによって一方の弦２０Ａの張力と他方の弦２０Ｂの張力とを簡単確実に調整することができる。
【００１２】
保持部３０は、滑軸部材３０（図２）又は滑車部材３５（図３）若しくはベアリング部材４０（図４）とすることができる。図３に示す滑車部材３５は軸体３６を備えており、一対の弦２１，２２，２３，２４における一方の弦２０Ａと他方の弦２０Ｂとが、そのループ部２０Ｃで滑車部材３５の保持溝３７に引張自在に周回保持される。この滑車部材３５は軸体３６を介して回動するものであるから、弦２０の摩擦抵抗が少なく、よりスムーズな張力の均一性を保つことができる。
【００１３】
図４には保持部としてベアリング部材４０が示される。図示のベアリング部材４０は公知のボールベアリングで、符号４１は軸、４２は保持溝、４３はボール部を表す。ベアリング部材４０はより高い回動性能を持ち、ループ部２０Ｃにおいて周回保持された一対の弦２１，２２，２３，２４の一方の弦２０Ａと他方の弦２０Ｂはそれらの均一な張力がスムーズに保たれる。
【００１４】
図５ないし図７は前記保持部材３０（滑軸部材、滑車部材３５又はベアリング部材４０）の楽器に対する取付状態を表す図であって、図５は胴部１１の響板１４の表面に直接設けた例、図６は胴部１１の後端部から延設されたホルダ４５に設けた例、図７は胴部１１の響板１４後端の端末部１４Ａの切欠１４Ｂに設けた例である。
【００１５】
また、図８ないし図１２には他の取付構造が示される。すなわち、図８は保持部としてベアリング部材４０Ｆを用いた例であるが、この例では、一対の弦２１，２２，２３，２４を構成する弦２０Ａと２０Ｂのループ部２０Ｃがベアリング部材４０Ｆの軸部４１Ｆに周回保持されている。４２Ｆは保持溝である。この場合、このベアリング部材４０Ｆは、図９のように、響板の端末部１４Ｆに設置される。符号１４Ｇは一対の弦２０Ａ，２０Ｂを挿通する切欠窓である。
【００１６】
図１０は駒１７Ｍに保持部を設けた例である。この例は、駒１７Ｍに、図１１のような一対の弦２０Ａ，２０Ｂを一定幅で保持する保持軸部３０Ｍを設けたものである。符号３１Ｍは保持溝である。さらに、図１２は、ベース部材１７Ｌに駒部１７Ｎと保持軸部３０Ｎを設けた例である。符号３１Ｎは保持溝である。
【００１７】
上記した例はいずれも請求項１に規定した一対の弦２１，２２，２３，２４の一方の弦２０Ａと他方の弦２０Ｂとが単一の弦よりなり、ループ２０Ｃ状に連続している構造であるが、このほかに、請求項２として規定し図１３及び図１４に示す例が開示される。
【００１８】
すなわち、図１３に図示したように、一対の弦２１（２２，２３，２４）を構成する各弦２０Ａ，２０Ｂは独立していて、各弦はヘッド部１３側で各端部がそれぞれ弦巻１８に調弦可能に巻着されてなるとともに、胴部１１側で各端部が中央部に軸部５１を有する回動部材５０の前記軸部５１の両側に引張り自在に保持されている。
【００１９】
回動部材４０は、回動軸５１の両側に弦係止用の孔５２，５３を有していて、図１４のように一対の弦２１（２２，２３，２４）の各弦２０Ａ，２０Ｂの端末（ボールエンド）２５が取り付けられるようになっている。各弦２０Ａ，２０Ｂは回動部材４０によって連続保持され、軸部５１により回動自在であるから、一方の弦２０Ａの張力と他方の弦２０Ｂの張力とは一定に保たれる。弦巻１８の調弦による一方の弦２０Ａの張力の変動は、図の鎖線のように回動部材５０の回動変位により、他方の弦２０Ｂに伝達され両弦の張力は均等にバランスする。なお、この回動部材４０を用いた保持部の構造は、従来使用されている弦（１本ずつの弦）をそのまま使用できる利点がある。
【００２０】
図１５は、一対の弦２１，２２，２３，２４の連続端部が弦方向に進退自在に構成された構造に係る。すなわち、この例のマンドリン１０Ａにあっては、図１６からもよくわかるように、一対の弦２１，２２，２３，２４の一側の端部を連続して保持する保持部材６０が、調節ねじ６１によって弦２０の弦方向に進退する可動部材６５に固設されていて、調節ねじ６１の回動によって各一対の弦２１，２２，２３，２４の張力を調整することができる。符号１２Ａはネック部である。
【００２１】
図１７に図示のマンドリン１０Ｂも同様の構造であって、ここでは、調節ねじ６９が従来のようにヘッド部１３Ｂの側部に設けられている。図１７において、符号１２Ｂはネック部で、図１０と共通の符号は共通の構成を表す。
【００２２】
【発明の効果】
以上図示し説明したように、この発明の弦鳴楽器の複弦構造によれば、２本一対の弦の一側の端部を連続保持して常に同じ張力で保持する構造としたものであるから、２本一対の弦の音調を簡単確実に調整でき、かつ演奏中にも常に同じ音程に保つことができる。
【図面の簡単な説明】
【図１】請求項１の発明の一実施例に係るマンドリンの斜視図である。
【図２】保持部として滑軸部材を用いた例を示す部分拡大斜視図である。
【図３】保持部として滑車部材を用いた例を示す部分拡大斜視図である。
【図４】保持部としてベアリング部材を用いた例を示す部分拡大斜視図である。
【図５】保持部の取付構造を示す側面図である。
【図６】保持部の取付構造の他の例を示す側面図である。
【図７】保持部の取付構造の他の例を示す背面図である。
【図８】ベアリング部材よりなる保持部の斜視図である。
【図９】図８の保持部の取付構造を示す部分断面図である。
【図１０】駒に保持部を設けた例を表す部分断面図である。
【図１１】その上面図である。
【図１２】駒に保持部を設けた別の例を示す部分断面図である。
【図１３】請求項２の発明の実施例を示す平面図である。
【図１４】図１３のＸ−Ｘ線の断面図である。
【図１５】ヘッド部側に保持部を進退自在に設けた例を示す要部の平面図である。
【図１６】図１５のＹ−Ｙ断面図である。
【図１７】ヘッド部側の保持部の別の例を示す平面図である。
【図１８】従来のマンドリンの一例を示す斜視図である。
【図１９】従来の弦留めの構造の一例を示す側面図である。
【符号の説明】
１０マンドリン
１１胴部
１２ネック部
１３ヘッド部
１４響板
２０弦
２１，２２，２３，２４一対の弦
２０Ａ、２０Ｂ一対の弦を構成する各弦
３０保持部（滑軸部材）
３５滑車部材
４０ベアリング部材
５０回動部材
５１回動軸
６０保持部
６１調節ねじ
６５可動部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stringed musical instrument, and more particularly to a double string structure of a stringed musical instrument.
[0002]
[Prior art]
For example, a double-stringed stringed musical instrument represented by a mandolin 80 shown in FIG. 18 or a 12-string guitar (not shown) is designed to play a single musical scale with two pairs of strings. In a stringed musical instrument having a double string structure of this kind, as shown in FIG. 19, each string 81 is fixed to a string clip 83 at the rear end of the body 82 of the musical instrument, and a string winding 84 of the head section. The tone of each string 81 is adjusted as two pairs of strings 81A, 81B, 81C, 81D by adjusting the tension.
[0003]
However, in the stringed musical instrument having the above-described structure, each string 81 is independently stretched between the string clasp 83 and the string winding 84, so that when tuning, two pairs of strings 81A, 81A, The tension of the strings 81 of 81B, 81C, and 81D must be finely adjusted.
[0004]
During the performance, the tension of any one of the two strings 81A, 81B, 81C, 81D may fluctuate (loose) during the performance. The pitches of the strings 81A, 81B, 81C, and 81D are out of order, and the tone becomes muddy, which is not preferable for performance.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and has a structure in which two pairs of strings are always held at the same tension so that the tone of the two pairs of strings can be easily and reliably adjusted, and even during performance. It is an object of the present invention to provide a double string structure of a stringed musical instrument that can always be kept at the same pitch.
[0006]
[Means for Solving the Problems]
That is, the invention of claim 1 is a stringed musical instrument having a double string structure in which a pair of strings plays a single musical scale, wherein the pair of strings comprises a single string, and Both ends of the string are wrapped around the bobbin so that they can be tuned, and are held in a loop-like manner in the holding portion made up of a shaft member, a pulley member, or a bearing member on the body side, and are orbitally held so as to be freely pulled. The present invention relates to a double string structure of a stringed musical instrument.
[0007]
Also, the invention of claim 2 is a stringed musical instrument having a double string structure in which a pair of two strings plays a single musical scale, wherein each of the strings of the pair of strings has a head wound on the head side and each end thereof has a winding. A stringed musical instrument which is wound so as to be tunable, and whose ends are attached to both sides of a shaft portion of a rotating member having a shaft portion at a central portion on a body side so as to be freely pulled. Pertaining to the double string structure.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of a mandolin according to an embodiment of the first aspect of the present invention, FIG. 2 is a partially enlarged perspective view showing an example in which a slip shaft member is used as a holding portion, and FIG. 3 also uses a pulley member as a holding portion. FIG. 4 is a partially enlarged perspective view showing an example in which a bearing member is used as a holding portion, FIG. 5 is a side view showing a mounting structure of the holding portion, and FIG. 6 is a mounting structure of the holding portion. FIG. 7 is a rear view showing another example of the mounting structure of the holding portion, FIG. 8 is a perspective view of the holding portion formed of a bearing member, and FIG. 9 is the mounting structure of the holding portion of FIG. 10, FIG. 10 is a partial sectional view showing an example in which a piece is provided with a holding portion, FIG. 11 is a top view thereof, and FIG. 12 is a partial sectional view showing another example in which a piece is provided with a holding portion. 13 is a plan view showing an embodiment of the invention of claim 2, FIG. 14 is a sectional view taken along line XX of FIG. 13, and FIG. 16 is a plan view of an essential part showing an example in which a holding part is provided on the head part side so as to be able to advance and retreat, FIG. 16 is a cross-sectional view taken along the line YY of FIG. 15, and FIG. It is.
[0009]
The mandolin 10 shown in FIG. 1 is an example of a double-stringed stringed musical instrument in which a pair of strings plays a single musical scale, and has substantially the same appearance as that described in the section of the prior art. The mandolin 10 is composed of a body 11, a neck 12, a head 13 and a string 20, and the string 20 is designed to sound a single scale with two pairs of strings 21, 22, 23, 24. In the drawing, reference numeral 14 denotes a sound board, 15 denotes a sound hole, 16 denotes a diaphragm, 17 denotes a piece, 18 denotes a string winding, and 19 denotes a knob.
[0010]
In the stringed musical instrument (mandolin) 10 of the present invention, one end (the body 11 side in the example of FIG. 1) of the pair of strings 21, 22, 23, 24 is continuous, The present invention is characterized in that the tension of one string (20A) and the tension of the other string (20B) are kept constant.
[0011]
As an example of the structure, the pair of strings 21, 22, 23, and 24 each include a single chord, and both ends of the single chord on the head unit 13 side as defined and illustrated in claim 1. Are wound around the bobbin 18 so that they can be tuned, and are held around the body 11 in a loop-shaped 20C in the holding portion composed of the pulley member 30, the pulley member 35, or the bearing member 40 so as to be freely pulled around. A disclosed structure is disclosed. FIG. 2 shows a holding portion made of the smooth shaft member 30, and reference numeral 31 denotes a holding groove thereof . Each pair of strings 21, 22, 23, 24 consists of a single string, because it is shall be tensile freely circulating holding the holding portion 30, one by chord tone by turning the knob 19 of the helical 18 The tension of the string 20A and the tension of the other string 20B can be easily and reliably adjusted .
[0012]
The holding portion 30 can be the pulley member 30 (FIG. 2) or the pulley member 35 (FIG. 3) or the bearing member 40 (FIG. 4). The pulley member 35 shown in FIG. 3 includes a shaft 36, and one string 20A and the other string 20B of the pair of strings 21, 22, 23, and 24 are held by the loop portion 20C of the holding groove of the pulley member 35. At 37, it is wrapped around so that it can be pulled freely. Since the pulley member 35 rotates through the shaft 36, the frictional resistance of the string 20 is small, and smoother uniformity of tension can be maintained.
[0013]
FIG. 4 shows a bearing member 40 as a holding portion. The illustrated bearing member 40 is a known ball bearing, reference numeral 41 denotes a shaft, 42 denotes a holding groove, and 43 denotes a ball portion. The bearing member 40 has higher rotation performance, and the one string 20A and the other string 20B of the pair of strings 21, 22, 23, 24 held around the loop portion 20C smoothly maintain their uniform tension. Dripping.
[0014]
FIGS. 5 to 7 are views showing the mounting state of the holding member 30 (spindle member, pulley member 35 or bearing member 40) to the musical instrument, and FIG. 5 is provided directly on the surface of the soundboard 14 of the body 11. FIG. 6 shows an example provided in a holder 45 extending from the rear end of the body 11, and FIG. 7 shows an example provided in a notch 14B of a terminal 14A at the rear end of the soundboard 14 of the body 11. .
[0015]
8 to 12 show other mounting structures. That is, FIG. 8 shows an example in which the bearing member 40F is used as the holding portion. In this example, the loop portions 20C of the strings 20A and 20B forming the pair of strings 21, 22, 23, 24 are formed by the shaft of the bearing member 40F. It is held around the part 41F. 42F is a holding groove. In this case, the bearing member 40F, as shown in FIG. 9, is installed in the terminal portion 14F of the soundboard. Reference numeral 14G is a cutout window through which the pair of strings 20A and 20B are inserted.
[0016]
FIG. 10 shows an example in which a holder is provided on the piece 17M. In this example, a holding shaft portion 30M for holding a pair of strings 20A, 20B at a constant width as shown in FIG. 11 is provided on a piece 17M. Reference numeral 31M is a holding groove. FIG. 12 shows an example in which a piece 17N and a holding shaft 30N are provided on a base member 17L. Reference numeral 31N denotes a holding groove.
[0017]
In each of the above examples, one string 20A and the other string 20B of the pair of strings 21, 22, 23, and 24 defined in claim 1 are formed of a single string and are continuous in a loop 20C shape. However, in addition to this, an example defined in claim 2 and shown in FIGS. 13 and 14 is disclosed.
[0018]
That is, as shown in FIG. 13, each of the strings 20A and 20B constituting the pair of strings 21 (22, 23 and 24) is independent, and each of the strings has a winding 18 on the head portion 13 side. The end of the rotating member 50 having a shaft portion 51 at the center of the body portion 11 is held on both sides of the shaft portion 51 so as to be freely pulled.
[0019]
The rotating member 40 has holes 52, 53 for locking the strings on both sides of the rotating shaft 51, and as shown in FIG. 14, the strings 20A, 20B of the pair of strings 21 (22, 23, 24). (Ball end) 25 is attached. Since each of the strings 20A and 20B is continuously held by the rotating member 40 and is rotatable by the shaft 51, the tension of one string 20A and the tension of the other string 20B are kept constant. Fluctuations in the tension of one of the strings 20A due to tuning of the bobbin winding 18 are transmitted to the other string 20B due to the rotational displacement of the rotating member 50 as shown by the dashed line in the figure, and the tension of both strings is evenly balanced. The structure of the holding portion using the rotating member 40 has an advantage that a conventionally used string (one string at a time) can be used as it is.
[0020]
FIG. 15 relates to a structure in which continuous ends of a pair of strings 21, 22, 23, and 24 are configured to be able to advance and retreat in the chord direction. That is, in the mandolin 10A of this example, as can be clearly understood from FIG. 16, the holding member 60 that continuously holds one end of the pair of strings 21, 22, 23, and 24 is provided with the adjusting screw. The pair of strings 21, 22, 23, and 24 can be adjusted by turning the adjustment screw 61, which is fixed to a movable member 65 that advances and retreats in the string direction of the string 20 by the string 61. Reference numeral 12A is a neck portion.
[0021]
The mandolin 10B shown in FIG. 17 has a similar structure, in which an adjusting screw 69 is provided on the side of the head 13B as in the conventional case. In FIG. 17, reference numeral 12B is a neck portion, and reference numerals common to those in FIG. 10 indicate a common configuration.
[0022]
【The invention's effect】
As shown and described above, according to the double string structure of the stringed musical instrument of the present invention, one end of one pair of two strings is continuously held and always held at the same tension. Therefore, the tone of the pair of strings can be easily and reliably adjusted, and the same pitch can always be maintained during the performance.
[Brief description of the drawings]
FIG. 1 is a perspective view of a mandolin according to an embodiment of the present invention.
FIG. 2 is a partially enlarged perspective view showing an example in which a smooth shaft member is used as a holding unit.
FIG. 3 is a partially enlarged perspective view showing an example in which a pulley member is used as a holding unit.
FIG. 4 is a partially enlarged perspective view showing an example in which a bearing member is used as a holding unit.
FIG. 5 is a side view showing a mounting structure of the holding unit.
FIG. 6 is a side view showing another example of the mounting structure of the holding unit.
FIG. 7 is a rear view showing another example of the mounting structure of the holding unit.
FIG. 8 is a perspective view of a holding portion made of a bearing member.
FIG. 9 is a partial cross-sectional view illustrating a mounting structure of the holding unit in FIG. 8;
FIG. 10 is a partial cross-sectional view illustrating an example in which a holding portion is provided on a piece.
FIG. 11 is a top view thereof.
FIG. 12 is a partial cross-sectional view showing another example in which a holding portion is provided on a piece.
FIG. 13 is a plan view showing an embodiment of the invention of claim 2;
14 is a sectional view taken along line XX of FIG.
FIG. 15 is a plan view of a main part showing an example in which a holding unit is provided to be able to advance and retreat on the head unit side.
FIG. 16 is a sectional view taken along line YY of FIG. 15;
FIG. 17 is a plan view showing another example of the holding unit on the head unit side.
FIG. 18 is a perspective view showing an example of a conventional mandolin.
FIG. 19 is a side view showing an example of a conventional string fastening structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Mandolin 11 Body part 12 Neck part 13 Head part 14 Soundboard 20 Strings 21, 22, 23, 24 A pair of strings 20A, 20B Each string 30 which constitutes a pair of strings Holding part (smooth shaft member)
35 pulley member 40 bearing member 50 rotating member 51 rotating shaft 60 holding portion 61 adjusting screw 65 movable member

Claims

In a stringed musical instrument having a double string structure in which a pair of strings plays a single scale, the pair of strings is formed of a single string, and both ends of the single string are wound around the head at the head. A stringed musical instrument which is wound so that it can be tuned, and which is continuously held in a loop shape in a holding portion formed of a shaft member, a pulley member, or a bearing member on the body side so as to be freely tensioned. Double string structure.

In a stringed musical instrument having a double string structure in which a pair of strings plays a single musical scale, each string of the pair of strings is wrapped around a head portion so that each end can be tuned to a bobbin. A double string structure for a stringed musical instrument , wherein each end on the body side is attached to both sides of a shaft of a rotating member having a shaft in the center .