KR20020083841A - A finger plate for a stringed instrument - Google Patents

Abstract

PURPOSE: A finger plate for a string instrument is provided to improve precision of tone by equalizing the length of a string between frets and crossing strings over frets with forming arc frets and passing the extension line of the string through the center of the arc. CONSTITUTION: A finger plate of a string instrument comprises a finger plate body(3); a nut(22) installed in the end of the finger plate body to extend the string along the finger plate body by supporting the first interval of the string including the second interval supported by a saddle; and plural frets(24) arranged successively along extension direction of the finger plate body. The arc fret is formed, and the center of the arc is integrated with the intersection of extension lines of two or more strings. The accuracy of tone is improved by arranging strings perpendicularly to frets, and strings are tuned easily by keeping balance of strings with constant tension.

Description

A FINGER PLATE FOR A STRINGED INSTRUMENT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fingerboards used for stringed instruments, such as guitars with frets arranged in correspondence with pitch, mandolin and ukulele.

As shown in Fig. 5, the conventional fingerboard for stringed instruments, for example, the other fingerboard 100, supports the fingerboard body 108, one end of each of the six strings 101-106. A nut (or upper nut) 107 and a plurality of frets 111 respectively configured on the fingerboard body 108 in parallel with the nut 107 at a predetermined distance from the nut 107. do. It should be noted that a zero fret 110 is formed on the inner surface of the nut 107.

The predetermined distance is based on the position where each fret 111 is formed. The position is between the face of the nut 107 and a saddle (lower nut), not shown, which supports the other end of each of the plurality of strings 101-106, It is also determined by calculating the average temperament of the natural scale in the zero fret 110 on the fingerboard.

In this configuration, Japanese Utility Model Registration No. 3,012,510 constitutes a radial portion extending from the same center point, and in particular, one fret located at the center of the fingerboard is provided with a plurality of frets perpendicular to the longitudinal axis of the fingerboard. A string instrument provided is disclosed. Japanese Patent Laid-Open No. 8-83064 discloses a guitar in which the frets are not parallel to each other by tilting the metal part of the frets.

However, as shown in FIG. 6, the distances L1 ^{′ to} L6 ^′ between the frets 111 of the respective strings 101 to 106 become longer while going from the center side to the outside of both sides, and each string 101. Angle between the first and second frets 111 1 to 6) becomes larger from the center side to the outside of both sides, so that the strings 103 and 104 located at the center and the strings 101 and 106 located at both sides are very different from the zero frets 110. Therefore, the frets 111 are arranged at the correct positions calculated according to the original average ratio, but may be a bad condition in which accurate pitches are difficult to obtain.

In addition, when the string crosses the frets obliquely, one side of the string has an obtuse angle with the fret and the other side has an acute angle with the fret. Therefore, while one side is free to the vibration of the string, the other side is not free to the vibration of the string, which is a bad condition that prevents the string from vibrating correctly. As such, in all of the above components, since the frets and strings do not perpendicularly cross each other, these have the above bad conditions.

Moreover, the above bad condition is particularly remarkable when pressing a plurality of strings to play a chord. In other words, since the pitch gap of each note of the string is different from each other in the string and the pressed position is also different, a discordant sound different from the original chord configuration is added to the acoustic state of the chord. Therefore, there is a problem that it is difficult to obtain an intrinsic accurate pitch and a good balance.

Further, in the conventional musical instruments in which the frets are arranged in parallel with each other, since the grooves on which the frets are mounted are formed in parallel with each other, the conventional musical instruments have a disadvantageous structure in resistance to tension of the strings. That is, in the state where the drying of the wood itself progresses, the grooves formed in parallel with each other are directly affected by the tension of the string since each groove is formed as a size with a margin in width and depth with respect to the base portion of the fret. Receive. Therefore, bending or warping of the neck or the fingerboard itself may occur disadvantageously.

Accordingly, the present invention is to provide a string fingerboard for string instrument that solves the above-mentioned disadvantages and problems by giving accurate pitch and good balance of the pitch.

1 is a schematic diagram of a guitar showing an example of an embodiment of the present invention.

2 is an explanatory diagram showing a radius of curvature of a fret according to an embodiment of the present invention.

3 is a schematic perspective view showing a fret and a mounting state of the fret.

4 is a diagram showing an exaggerated part of the guitar in order to explain the effect of the present invention.

5 is a view showing a conventional fingerboard.

Modified view to show the conventional fret configuration of FIG.

* Explanation of symbols for main parts of the drawings

1: other 2: guitar body

3: fingerboard 4: neck portion

11-16: String 18: Saddle

22: nut 23: string mounting groove

24: frets

Therefore, the string board for string instruments according to the present invention is provided at the fingerboard main body and one end of the fingerboard main body to support the first ends of the plurality of strings arranged side by side, and also support the second ends of the strings. A nut formed with a narrower width than the saddle, and a fret arranged on the fingerboard body at a predetermined distance from the nut, wherein each fret has an extension line between two strings positioned on both outer sides of the plurality of strings. The position is formed in the shape of an arc with the center of the arc.

Thus, according to the present invention, since each fret is formed exactly as described above, the strings located on both outer sides having the maximum spacing in the prior art can cross all the frets vertically, so that an accurate pitch can be obtained. In addition, the balance of the pitch can be improved.

In addition, since the mounting groove is formed in an arc shape corresponding to the frets to be mounted in the groove, the resistance of the groove of the fret to the tension of the string increases compared to the groove of the conventional frets formed in parallel, and thus warpage due to drying And stable properties including resistance to deformation such as warping.

Moreover, in the present invention, the predetermined distance is the distance calculated as the respective average ratio from the zero frets which is the inner surface of the nut. Thus, each distance between the frets is adapted to correspond respectively to each distance of the same calculated average rate at each string.

In addition, in this invention, all the extension lines of a some string pass through a center point. Therefore, since all strings intersect all frets vertically, the area where the string contacts the frets is small, and the vibration of the strings is accurate, so that clear and accurate pitches can be obtained.

The following is a description of embodiments of the present invention with reference to the drawings. The string instrument according to the present invention is a guitar, a ukulele, a mandolin, a banjoe and the like, but the case where the present invention is applied to a guitar will be described as follows.

As shown in FIG. 1, the guitar 1 is a neck portion having a guitar body 2 having a resonance space therein and a fingerboard 3 extending from the guitar body 2. 4) and strings 11 to 16 arranged at equal intervals.

The other main body 2 has a pedestal having pins 17 for fixing the first ends of the respective strings 11 to 16 and saddles 18 for supporting the strings at a predetermined height in the vicinity of the first stage. A pedestal 19 and an opening 20 through which vibrations of air generated by vibrations of the strings 11 to 16 enter the resonance space are formed.

The neck portion 4 extends from the other body 2 in a direction away from the pedestal 19. At the end of the neck portion 4, six string winding portions 21 are wound around the second ends of the strings 11-16. The nut 22 which supports the strings 11-16 to predetermined height in the vicinity of the string winding part 21, and comprises a part of the fingerboard 3 is provided. The nut 22 is formed to have a narrower width than the saddle 18, and string mounting grooves 23 for mounting the strings 11 to 16, respectively, are formed in the nut 22 at equal intervals.

The fingerboard 3 extends from the nut 22 to the vicinity of the opening 20, on which a fret 24 is mounted.

As shown in FIG. 2, the fret 24 according to the present invention has a radius of curvature of the radius Rp from the intersection X between the extension line E1 of the first string 11 and the extension line E6 of the sixth string 16 as the radius of curvature. It is formed into an arc. In addition, it is preferable that the extension lines E2 to E5 of the second and fifth strings 12 to 15 also pass through the intersection point X. The intersection point X is the inclination angle σ of the first string 11 and the inclination angle σ '≒ σ of the sixth string 16, and also the distance between the first string 11 and the sixth string 16. It is determined by obtaining (d) (R0 ≒ d / tan σ).

Each fret 24 is formed in an arc shape with the intersection X as the center point. Specifically, for example, on the inner surface of the nut 22 from the intersection X between the extension line E1 of the first string 11 and the extension line E6 of the sixth string 16 as measured values in the case of a normal classical guitar. The distance R0 to the formed zero fret F0 is about 1365.82 mm. In addition, as an average calculation distance of about 35.02 mm between the zero frets F0 and the first frets F1 for raising the pitch halftone, the radius of curvature R1 of the first frets F1 is about 1400.84 mm. . In the same way, in the case of the second fret F2, about 68.08 mm (first fret) from the zero fret F0 to the second fret F2 for raising the pitch a semitone from the first fret F1. As an average calculation distance of about 33.06 mm) from F1), the radius of curvature R2 of the second fret F2 is about 1433.90 mm.

Usually, as shown in FIG. 3, the fret 24 protrudes from the finger board 3, and the cross section extends from the substantially semi-circular protrusion part 25 and the lower part of the protrusion part 25, and a cross section is carried out. It is comprised from the spherical mounting part 26 and the support protrusion part (s) 27 formed in either or both of the mounting parts 26, and is formed in circular arc shape of predetermined radius of curvature Rp. . Each fret 24 is mounted by pushing it into each mounting groove 30 formed with the same radius of curvature Rp.

Since the mounting groove 30 is formed in an arc shape, compared with the conventional grooves formed in parallel with each other, deformation such as bending or distortion of the neck portion 4 and the fingerboard 3 due to the tension of the strings 11 to 16 is performed. Resistance to can be increased. As shown in FIG. 4, the lengths L1 to L6 of the strings 11 to 16 between the adjacent frets 24 are the same, and each string 11 to 16 has all the frets 24 removed. Cross at right angles (θ = 90 °).

As described above, according to the present invention, since each fret is formed in an arc shape and the extension line of the string intersects the center of the arc, the lengths of the strings between adjacent frets can be the same. Each string also crosses all frets vertically. Therefore, accurate pitch precision can be obtained.

Moreover, by making the load (tension) of each string constant, the balance between strings can be kept constant and the tuning of strings can be made easy.

Moreover, since all strings cross all frets vertically, normal vibration of each string is obtained, and a good tone is maintained.

Since the mounting groove is formed according to the shape of the fret, the resistance to deformation such as bending and warping due to the tension of the string is significantly increased as compared with the conventional mounting grooves formed in parallel with each other, and thus the tension of the string due to playing Deformation by drying over time is suppressed. Thus, a stable playing state can be maintained.

As many apparently different embodiments of the invention can be made without departing from the spirit and scope of the invention, it is to be understood that the invention is not limited to the specific embodiments thereof except as defined in the appended claims.

Claims (18)

As fingerboard for string instrument, With the fingerboard body, It is provided at one end of the fingerboard body, and supports a first end of a plurality of strings having a second end supported by a saddle, and extends in the extending direction of the fingerboard body along the fingerboard body. With nuts, In the fingerboard for stringed instrument comprising a plurality of frets continuously arranged along the extending direction of the fingerboard body, Each of the frets is formed in an arc shape with the center of the arc at a position coinciding with the intersection of the extension lines of at least two strings among the plurality of strings, and Wherein each fret is arranged to intersect all the plurality of strings at right angles. The method of claim 1, The fingerboard body has a plurality of arcuate mounting grooves formed therein, and the frets are mounted to the mounting groove, respectively. The method of claim 2, Each fret is arranged at a position determined according to the average ratio from the zero frets formed on the inner surface of the nut along the extending direction of the fingerboard body. The method of claim 1, And each fret is disposed at a position determined according to each average ratio from the zero frets formed on the inner surface of the nut along the extending direction of the fingerboard body. As a string instrument, With the fingerboard body, A nut which is provided at one end of the fingerboard body and supports the first ends of a plurality of strings extending in an extension direction of the fingerboard body along the fingerboard body; Birds arranged to support the second end of the plurality of strings, In the string instrument comprising a plurality of frets continuously arranged along the extending direction of the fingerboard body, Each of the frets is formed in an arc shape with the center of the arc having a position corresponding to the intersection of the extension lines of at least two strings among the plurality of strings, Wherein each fret is arranged to intersect all the plurality of strings at right angles. The method of claim 5, The fingerboard main body has a plurality of arcuate mounting grooves formed therein, and the fret is mounted on the mounting groove, respectively. The method of claim 6, Each fret is arranged at a position determined according to each average ratio from the zero frets formed on the inner surface of the nut, along the extending direction of the fingerboard body. The method of claim 5, Each fret is arranged at a position determined according to each average ratio from the zero frets formed on the inner surface of the nut, along the extending direction of the fingerboard body. The method of claim 5, Further comprising a plurality of strings supported by the nut on the first end of the strings and supported by the saddle on the second ends of the strings, All of the strings intersecting each of the frets at right angles. The method of claim 9, And said saddle is wider than said nut. The method of claim 5, And said saddle is wider than said nut. In other devices, With the fingerboard body, A nut which is provided at one end of the fingerboard body and supports the first ends of a plurality of strings extending in an extension direction of the fingerboard body along the fingerboard body; Birds arranged to support the second end of the plurality of strings, In the guitar device comprising a plurality of frets arranged continuously along the extending direction of the fingerboard body, Each of the frets is formed in an arc shape with the center of the arc at a position corresponding to the intersection of the extension lines of at least two strings among the plurality of strings, Wherein each fret is arranged to intersect all the plurality of strings at right angles. The method of claim 12, The fingerboard body includes a plurality of arcuate mounting grooves formed therein, and the frets are mounted in the mounting grooves, respectively. The method of claim 13, And each fret is disposed at a position determined according to each average ratio from the zero frets formed on the inner surface of the nut, along the extending direction of the fingerboard body. The method of claim 12, And each fret is disposed at a position determined according to each average ratio from the zero frets formed on the inner surface of the nut, along the extending direction of the fingerboard body. The method of claim 12, Further comprising a plurality of strings supported by the nut on the first end of the strings and supported by the saddle on the second ends of the strings, And all of the strings cross each of the frets at right angles. 17. The device of claim 16, wherein the saddle is wider than the nut. 13. The guitar device of claim 12 wherein the saddle is wider than the nut.