JPH09230853A - Acoustic guitar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a playing property without acoustic hindrance by notching the section from the part near the neck of the soundboard of a resonance body to a rib to a curved recessed surface an joining a cover plate to the notched part via a band-shaped reinforcing material. SOLUTION: The section from a part in proximity to the neck of the soundboard 3 of the resonance body 1 to a part of the rib 5 is notched to the two-dimensional curvilinear recessed surface. The band-shaped reinforcing material 9 is affixed to the inner side of the notched edge of the soundboard 3 and the rib 5. The cover plate 11 affixed to the two-dimensional curvilinear recessed surface meeting the notched apart 10 is joined to the notched apart 10 via the reinforcing material 9. The reinforcing material 9 is constituted by forming many scores at fixed intervals to bar-shaped wood and is formed to a bellows from so as to have flexibility. Such reinforcing material 9 is affixed to the inner side of the notched edge of the soundboard 3 and the rib 5 along the curved surface thereof. As a result, the manufacture of the hollow boxy 1 by the wood is made easy and the playing property is improved without impairing the acoustic effect by the resonance body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic guitar having a resonance drum.

[0002]

2. Description of the Related Art Generally, an acoustic guitar such as a classical guitar or a folk guitar is composed of a hollow box-shaped resonance cylinder and a neck, and produces a loud sound by resonating the vibration of a string with the resonance cylinder. Thus, the general shape of the resonance cylinder is formed so that the left and right sides are substantially symmetrical. Further, the neck has a fingerboard, and a member called a fret for determining an equally divided scale is arranged on the fingerboard.
A typical acoustic guitar is joined to the resonance barrel around the 14th fret, and the fret of 15th fret or more is arranged on the upper surface of the resonance barrel. In addition, music in recent years has become diversified or complicated, and the range of music played on a guitar has become wider. With a 22 fret guitar, E2 (82.4)
The range from 07 Hz) to C6 (1174.628 Hz) will be covered. (In fact, there are many harmonics.)

However, since the conventional normal acoustic guitar has the above-mentioned structure, when playing a so-called high position range higher than 15 frets, the resonance body is an obstacle and the fingers cannot be carried smoothly. It is a situation where it is possible to perform only up to G5 (880 Hz). Also, a so-called cut-way style guitar can play even higher frets, but the cut-way style significantly reduces the volume of the resonance barrel, which has a negative acoustic impact. It was

Further, the conventional acoustic guitar has a box-shaped resonating body in which the joints of the front and side plates and the back and side plates are joined substantially at right angles to each other, so that they are played on the knees. When standing and playing, the right angle joint impinges on the player's abdomen and chest at an acute angle and impairs playability,
In particular, in the case of a guitar having a large resonance barrel, this has a drawback that the playability is remarkably deteriorated.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to improve the playability of an acoustic guitar without causing any acoustic obstacle.

[0006]

To this end, the acoustic guitar of the present invention is provided with a two-dimensional curved concave surface notched from a portion of the resonance drum near the neck of the upper shell to a portion of the side plate. A belt-shaped reinforcing member such as a bellows is attached to the inside of the notched edges of the instep and the side plate, and a cover plate shaped in a two-dimensional curved concave shape that matches the notched portion is provided through the reinforcing member. It is characterized by being joined to the notch. Further, the acoustic guitar of the present invention has a two-dimensional curved concave surface notched from a part of the back shell to a part of the side plate in the resonance body, and has a bellows-like shape inside the notched edges of the back shell and the side plate. A strip-shaped reinforcing material is attached, and a cover plate shaped into a two-dimensional curved concave surface that matches the cutout portion is joined to the cutout portion via the reinforcing material.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. The acoustic guitar shown in FIGS. 1 and 2 is composed of a resonance body 1 and a neck 2. The resonance body 1 is formed into a cocoon-shaped hollow box by attaching a front shell 3, a back shell 4 and side plates 5. ing. 6 is a sound hole opened in the neck 2, and 7 is a lower piece. A finger plate 8 is attached from the surface of the neck 2 to the surface of the upper 3.

In the present invention, however, a portion of the resonance shell 1 which is close to the neck 2 of the outer shell 3 and a portion of the side plate 5 is notched into a two-dimensional curved concave surface, and the outer shell 3 and the outer shell 3 are A strip-shaped reinforcing material 9 is attached to the inside of the cutout edge of the side plate 5, and a cover plate 11 shaped in a two-dimensional curved concave shape that matches the cutout portion 10 is provided with the cutout portion 10 via the reinforcement material 9. To join.

As shown in FIG. 4, the reinforcing member 9 is a bellows-shaped member which is made flexible by forming a large number of cuts in a rod-shaped wood at regular intervals. It is attached to the inside of the notched edge of the side plate 5 along its curved surface. Reference numeral 12 is an inlay applied to the outer peripheral surface of the joint between the back shell 4 and the side plate 5, and such decorative inlay is also applied to the periphery of the outer shell 3 and the periphery of the sound hole 6.

As described above, the portion extending from the outer shell 3 to the side plate 5 is cut into a two-dimensional curved concave surface, and the curved concave surface covering plate 11 matching the notch portion 10 is joined, so that the covering plate 11 is formed. The wood board can be easily shaped by bending it in two dimensions. For this reason, the entire resonance cylinder 1 can be easily manufactured from wood such as name wood having excellent acoustic effects. The notch allows the fingers of the player to be smoothly carried to the portion of the fingerboard 8 located on the front side 3 and the so-called high-position playability is improved.

On the other hand, in the acoustic guitar shown in FIGS. 5 and 6, a part of the back shell 4 of the resonance body 1 to the side plate 5 is used.
Is cut into a two-dimensional curved concave surface, a reinforcing material 9 is attached to the inside of the notched edges of the back shell 4 and the side plate 5, and a two-dimensional curved shape matching the notched portion 10 is formed. The cover plate 11 formed in a concave shape is provided with the notch 10 through the reinforcing member 9.
By cutting out one side edge on the back side of the resonance drum 1 in this way, pressure on the abdomen and chest of the player by the resonance drum 1 can be eliminated, and playability is improved.

In the present invention, the size of the entire resonance cylinder 1 (particularly the front surface of the resonance cylinder 1) is cut out by notching only the part extending from the front shell 3 to the side plate 5 or the back shell 4 extending from the side plate 5 as described above. Alternatively, since the back projected area) is not changed, the playability can be improved with almost no hindrance to the sound.

In the embodiment of this figure, a cylindrical surface is shown as the two-dimensional curved concave surface, but a cover plate 11 which is notched into a conical surface and shaped into a conical surface may be joined. . Alternatively, similarly, it is possible to adopt another curved surface form that can be easily formed by bending the flat plate material.

[0014]

As described above, according to the present invention, it is easy to manufacture a resonance cylinder made of wood such as name wood as in the conventional case.
There is a beneficial effect of improving the playability of the acoustic guitar without impairing the acoustic effect of the resonance drum.

[Brief description of drawings]

FIG. 1 is an external perspective view of a front surface of an acoustic guitar according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a perspective view of a belt-shaped reinforcing member.

FIG. 5 is an external perspective view of the back surface of the acoustic guitar according to the present invention.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

[Explanation of symbols]

 1 Resonance trunk 2 Neck 3 Front shell 4 Back shell 5 Side plate 9 Reinforcing material 10 Notch 11 Cover plate

Claims (2)

[Claims] 1. A two-dimensional curved concave portion is cut out from a portion of the resonance trunk near the neck of the upper shell to a portion of the side plate, and a bellows shape is formed inside the notched edges of the upper shell and the side plate. The acoustic guitar, characterized in that the strip-shaped reinforcing material is adhered, and a cover plate shaped into a two-dimensional curved concave surface that conforms to the notch is joined to the notch via the reinforcing material. 2. A portion extending from a part of the back shell to a part of the side plate in the resonance trunk is cut out in a two-dimensional curved concave shape, and a belt-shaped reinforcing member such as a bellows is provided inside the notched edges of the back shell and the side plate. And a cover plate formed into a two-dimensional curved concave surface that conforms to the cutout portion and is joined to the cutout portion via the reinforcing material.