JP6678433B2 - guitar - Google Patents

Description

  The present invention relates to a guitar, and more particularly, to an electric guitar in which a hard material and a soft material are optimally combined while ensuring body rigidity.

Guitars such as acoustic guitars and electric guitars have long been used by people as musical instruments for performance.
Among them, the electric guitar has a function of converting string vibration into an electric signal by a pickup (microphone), connecting the guitar body to a guitar amplifier with a cable, and playing at an arbitrary volume. Also, electric guitars can easily change the sound quality with an effector or the like, so that one of the appeals is that various expressions can be made.

Since the body of such an electric guitar does not require a box for resonance, it is formed in a plate shape and is generally made of a single piece of wood or the like.
On the other hand, in the past, for example, as represented by Patent Literature 1 and Patent Literature 2, a technique of combining a plurality of materials with a body of an electric guitar has been proposed. This is because the expression of sound changes more when a plurality of materials are used than when only a single material is used for the plate-like body of the electric guitar.

More specifically, according to Patent Literature 1, with respect to a guitar body, a first member having a surface concave portion and a material different from or different from the first member are made of a material different from or different from the first member, and closely adhered to the inner periphery of the first member. There is disclosed a structure including a second member embedded and fixed in the surface recess so as to be flush with the upper surface of the peripheral portion.
Further, according to Patent Literature 2, it is disclosed that a body is constituted by a body frame, a center block provided at a central portion of the body frame, and a top deck and a back deck covering these front and back surfaces.

Japanese Patent Application Laid-Open No. H10-1224058 JP 2000-276167 A

According to the above-mentioned patent documents, when a hard material and a soft material are combined, or when a light material and a heavy material are combined, the sound is compared with that of a single material. It has been described that the expression of DNA changes and the selection range in design can be widened.
However, not only the above-mentioned patent documents but also the currently proposed techniques cannot adequately satisfy the performers and their market needs, and have the following problems.

That is, in the body structure of a guitar proposed in the past, although the expression of sound can be changed, the sound may not always match the taste of the player (user). . The taste of sound changes from one person to another according to the times, but a gentle and original tone with a high sustain (reverberation) is always desired, and a relaxation effect can be expected even in the modern times when various music has developed. The need is strong in that it can be done.
On the other hand, electric guitars are often used in concerts and live performances, and depending on the performance performed by the player, appropriate strength is also required.

  The present invention has been made in view of the above-described problems as an example, and is distinguished from a conventionally proposed guitar structure, has a soft sound quality function and can be manufactured easily and easily, and has excellent durability. It aims to provide a guitar.

  In order to solve the above problems, a guitar according to an embodiment of the present invention has (1) a neck formed by a member having a first hardness, and a connection portion connected to a base end of the neck, A body made of wood having a second hardness lower than the first hardness, wherein the connection portion has a columnar island portion formed by shaving a part of the body. And an embedding member embedded in the annular recess so as to surround the columnar island portion and having a hardness higher than the second hardness.

In the guitar of (1), the guitar further includes (2) a fastening member for fastening the neck and the body, and the fastening material fastens the embedded member and the neck of the connection portion. Preferably.
Further, in the guitar according to the above (1) or (2), (3) the neck and the body are so formed that the neck covers at least a part of a columnar island portion of the body surrounded by the embedding member. Are preferably fastened.

(4) In the guitar according to any one of (1) to (3), (4) a step portion is formed in which at least a part of the embedding member and the columnar island portion is depressed with respect to an upper surface of the body. Preferably, a part of the neck is buried in the step, and a remaining part of the neck projects from an upper surface of the body.
Further, in the guitar according to any one of the above (1) to (4), (5) the embedding member is an annular pillar having an elliptical hole formed in a center, and the elliptical hole is It is preferable that the fastening member is eccentric with respect to the center of the embedding member, and the fastening material is arranged in a wide area formed by the eccentricity.

  According to the present invention, the connection portion between the neck and the body has an annular concave portion formed by cutting a part of the body, and an embedding member embedded in the annular concave portion and having a hardness higher than the first hardness. Therefore, the neck and the body can be firmly fixed. In addition to this, since most of the body can be made of wood having a second hardness lower than the first hardness, it is possible to express a gentle and original sound with improved sustain. ing.

FIG. 1 is a perspective view illustrating an appearance of a guitar 100 according to a first embodiment. FIG. 2 is a perspective view illustrating an appearance of a neck 10 of the guitar 100 according to the first embodiment. FIG. 2 is a perspective view illustrating an appearance of a body 20 of the guitar 100 according to the first embodiment. It is sectional drawing which shows the structure of the cyclic | annular recessed part 21 and columnar island part 22 in 1st Embodiment. It is a figure explaining the structure of the embedding member 23 in 1st Embodiment. FIG. 3 is a cross-sectional view illustrating a configuration of a connection portion α between a neck 10 and a body 20 according to the first embodiment. FIG. 2 is an exploded perspective view of the guitar 100 according to the first embodiment. It is a figure explaining composition of guitar 200 in a 2nd embodiment.

Hereinafter, embodiments for carrying out the present invention will be described. For convenience of explanation, in each drawing, the direction in which the neck extends is the X direction, the direction parallel to the front and back surfaces of the body and perpendicular to the direction in which the neck extends is the Y direction, and the height is perpendicular to the X and Y directions. The direction is set as the Z direction. However, the definitions regarding these directions are not used to limit the scope of the claims.
In the following, an electric guitar (electric guitar) will be described as an example of a guitar, but the present invention may be applied to other guitars such as an acoustic guitar.

<First embodiment>
FIG. 1 is a diagram illustrating an appearance of a guitar 100 according to a first embodiment of the present invention.
As shown in FIG. 1, a guitar 100 according to the present embodiment includes at least a neck 10 and a body 20. Note that, in the present embodiment, other than the configuration described in detail below, a known configuration such as the above-described Japanese Patent Application Laid-Open No. H10-1224058 and Japanese Patent Application Laid-Open No. 2000-276167 can be appropriately used.

The neck 10 is formed of a member having a first hardness.
As is clear from FIG. 2, one end of the string is fixed to the tip 11 of the neck 10, and a fingerboard (not shown) is provided on the upper surface facing the string.
The base end 12 (the end opposite to the distal end 11) of the neck 10 is a connecting portion β for connecting to a connecting portion α of the body 20 described later. The detailed structure of the connection part β in the neck 10 will be described later.
Here, the “first hardness” is used to mean that it is harder than the hardness (second hardness) of the material of the body 20 described later. Therefore, the "first hardness" is not determined by the absolute value range of the hardness, but is determined by the relative relationship with the second hardness.

As the member having the first hardness, for example, wood such as maple or mahogany can be applied. In the present embodiment, a maple is applied as the neck 10. As the member having the first hardness, in addition to the above-described wood, a synthetic resin such as a plastic, a metal, or the like can be used as necessary.
Also, as the material of the fingerboard described above, for example, wood such as maple, rosewood, or ebony can be used. The material of the fingerboard is not particularly limited, and synthetic resin such as plastic or metal may be used in addition to the above-mentioned wood.

Next, the structure of the body 20 will be described in detail with reference to FIG.
The main portion of the body 20 is formed of wood having a second hardness lower than the hardness (first hardness) of the neck 10 while having a connection portion α connected to the neck 10. As an example, the thickness of the body 20 in the Z direction is set to 30 to 60 mm, but is not limited thereto.
Here, the “second hardness” is used to mean a hardness lower than the first hardness, and is an absolute value because it is a hardness determined in a relative relationship with the first hardness described above. It is not specified in the numerical range.
As the wood having the second hardness used in the present embodiment, for example, Tenryu cedar, which is famous as a famous wood in Japan, is used. As described above, in the present embodiment, Tenryu cedar is used as wood occupying the main part of the body 20, and a soft sound with improved sustain (finish) is provided by Tenryu cedar having a lower hardness than maple wood. Has been realized.

  As the wood having the second hardness, the above-mentioned Tenryu cedar is the best. Gaboon, camphor, black pine, sour walnut, gelton, poplar, white wood, white pine, European lime and the like may be applied. Further, wood having a lower hardness than Tenryu cedar (Obeche, Kiri, Balsa, Falkata, etc.) may be used.

The connection portion α is a region connected to the connection portion β of the neck 10 via a known fastening material. The known fastening material is not particularly limited, and examples thereof include a screw and an adhesive. In the present embodiment, the size of the connection portion α in the plane direction (the size as viewed from above in the Z-axis direction) is substantially equal to the size of the step portion 24 in the plane direction.
As is clear from FIGS. 1 and 3, the connection portion α in the body 20 of the present embodiment includes an annular concave portion 21, a columnar island portion 22, an embedding member 23, and a step portion 24.

The annular concave portion 21 is a portion formed by cutting a part of the body 20. That is, as shown in FIGS. 3 and 7, the annular concave portion 21 is a bottomed and annular concave portion formed in a region of the body 20 facing the connection portion β of the neck 10. Note that the annular concave portion 21 of the present embodiment is an elliptical concave portion whose length in the Y direction is shorter than the length in the X direction as an example of “annular”.
Therefore, as is clear from FIG. 3, a columnar island portion 22 made of wood having the second hardness is arranged at the center of the annular concave portion 21 in the body 20.
The columnar island portion 22 is surrounded by the annular concave portion 21, and is made of wood having a second hardness, which is a main portion of the body 20 in the present embodiment. In the present embodiment, the end of the columnar island portion 22 in the −X direction is notched to form the step portion 24.

Here, a more specific structure of the annular concave portion 21 and the columnar island portion 22 will be described with reference to FIG. Here, in FIG. 4, (a) shows the AA cross section in FIG. 3, and (b) shows the BB cross section in FIG. In addition, illustration of the fastening material is omitted in FIG. 4 for simplification of the description and the like.
Accordingly, in FIG. 4A, the width of the annular recess 21 on the −Y direction side with respect to the columnar island portion 22 is a _y1 , the width on the + Y direction side is a _y2 , and the depth of the annular recess 21 is a _y3 . it's shown. Further, displaying the width in Y direction of the columnar island portion 22 _{b y1,} the height from the bottom of the annular recess 21 and _{b y2.} The thickness from the back side of the body 20 (the opposite side in the case where the surface plane annular recess 21 is formed) to the bottom of the annular recess 21 is shown as c _1.

On the other hand in FIG. 4 (b), the columnar island width in the -X direction side than the 22 _a x1 of the annular recess 21, the + X direction side of the width _{a x2,} further the depth of the annular recess 21 and _{a x3} it's shown. Further, the width of the columnar island portion 22 in the X direction is represented by b _x1 , and the height from the bottom of the annular concave portion 21 is represented by b _x2 . In addition, by including a portion of the part and the embedded member 23 of Z ₁ of a depth columnar island portion 22 from the upper surface of the body 20 is removed, the step portion 24 is formed in the body 20. As will be described later, the connection part β of the neck 10 is arranged in the step portion 24, so that the side surface (part) of the neck 10 also contacts the side surface inside the step portion 24 of the body 20.
In the figure, the thickness from the back side of the body 20 (the opposite side in the case where the surface plane annular recess 21 is formed) to the bottom of the annular recess 21 is shown as c _2.

In the present embodiment, since the height of the depth and the columnar island portion 22 of the annular recess 21 is uniform in the X direction and the Y direction, have substantially the _{a y3 = a x3, b y2} = b x2. However, the present invention is not limited to this mode. For example, the depth of the annular concave portion 21 may be gradually changed along the X direction or the Y direction. Thereby, the effect of causing a change in the sound generated from the guitar 100 can also be achieved.

Here, the annular concave portion 21 of the present embodiment has the following structure as a non-limiting feature. However, “equal” in the following formula includes “nearly equal” in a substantially equivalent sense except for an error.
・ A _y1 = a _y2
Ay3 = _by2
・ A _y1 (= a _y2 )> by _y1
・ A _x1 > a _x2
Ax3 = _bx2
* B _x1 = a _x1
(· A _y3 = a _x3 )
Note that the size of c ₁ and c _2, may be set arbitrarily within a range that does not collapse the shape of the annular recess 21, in this embodiment there is a 3~20mm as an example.

  The embedding member 23 is embedded in the annular concave portion 21 so as to surround the columnar island portion 22. In the present embodiment, the embedding member 23 is fixed in the annular concave portion 21 by a known adhesive. The embedding member 23 is formed of a member having a higher hardness than the second hardness described above. The member having a higher hardness than the second hardness is preferably, for example, the member having the first hardness described above. Therefore, in this embodiment, wood having relatively high hardness such as maple is used as the embedding member 23.

The specific material of the embedding member 23 is not limited to wood, and a synthetic resin such as plastic, metal, or the like may be used as long as it has a hardness higher than the second hardness.
Further, the embedding member 23 is not limited to the example fixed in the annular concave portion 21 with an adhesive, and may be fitted into the annular concave portion 21 by, for example, press fitting.

The step portion 24 is, for example, a concave portion formed by cutting a region of the body 20 overlapping the base end portion 12 of the neck 10 when viewed from above in the Z direction. In other words, the stepped portion 24 is a recess formed by removing a part of the body 20 that overlaps the base end 12 of the neck 10 in the Z direction, a columnar island 22 and a part of the embedding member 23. It has become. Therefore, the width of the step portion 24 in the Y direction is set to be substantially equal to the width of the neck 10 in the Y direction or slightly larger than the width of the neck 10 in the Y direction.
In the Z direction, as is apparent from FIG. 6B described later, a part including the connection portion β of the neck 10 is buried in the step portion 24 at the time of fastening with the neck 10. In other words, in the present embodiment, a step portion 24 is formed in which at least a part of the embedding member 23 and the columnar island portion 22 is depressed with respect to the upper surface F3 of the body 20, and a part of the neck 10 is formed in the step portion 24. Is buried and the remaining portion of the neck 10 protrudes from the upper surface F3 of the body 20.

Such a step portion 24 is formed, for example, as follows.
That is, first, as described above, after the annular concave portion 21 is formed in the body 20, the embedding member 23 is fixed in the annular concave portion 21 via an adhesive. Next, a step 24 is formed on the upper surface F3 of the body 20 to which the embedding member 23 is fixed by a known grinding and cutting tool. At this time, when the guitar 100 is viewed from above in the Z direction, at least a part of the annular concave portion 21, the columnar island portion 22, and the embedding member 23 are arranged in the step portion 24 (in the connection portion α), and The remaining portions of the annular concave portion 21, the columnar island portion 22, and the embedding member 23 are arranged in regions other than the step portion 24.
In this way, the step portion 24 can be formed more accurately and efficiently than when the body 20 and the embedding member 23 are individually processed.

Here, a more specific structure of the embedding member 23 will be described with reference to FIG. Here, in FIG. 5, (a) is an external perspective view of the embedding member 23, (b) is a CC cross section in FIG. 5 (a), and (c) is D in FIG. 5 (a). -D section is shown, respectively.
First, as shown in FIG. 5 (a), the embedding member 23 is an annular column member having a length in the X direction longer than the length in the Y direction when viewed from the Z direction (both rectangular objects having rounded corners at four corners). ), And a hole 23b formed at the center of the main body 23a.
Further, a notch of a depth Z <b> ₁ constituting the above-mentioned step portion 24 is formed on the end side of the embedding member 23 in the −X direction. As for the size in the X direction definitive to the notch, to the extent that spans the hole 23b, may be set to any value other than Z ₂ to be described later.

As is clear from the figure, the embedding member 23 is a columnar member having a predetermined height in the Z direction, and an elliptical hole (having different widths in the X and Y directions) is formed in the center thereof. It is in the form that was done.
However, the shape of the hole is not limited to an ellipse, and for example, the shape of the hole viewed from above in the Z direction may be a circle or a rectangle.

In FIG. 5B, the width of the embedding member 23 on the −Y direction side with respect to the hole 23b on the −Y direction side is d _y1 , the width on the + Y direction side is d _y2 , and the height of the embedding member 23 (in the Z direction). (Size) is displayed as _dy3 . Further, displaying the width of the hole 23b and _{e 1.}
On the other hand, in FIG. 5C, the width of the embedded member 23 on the −X direction side with respect to the hole 23 b is d _x1 , the width on the + X direction side is d _x2 , and the height of the embedded member 23 (Z direction). _Is indicated as d _{× 3} . Further, displaying the width of the hole 23b and _{e 2.}

The embedding member 23 of this embodiment has the following structure as a non-limiting feature. However, in the following formula, “equal” includes “nearly equal” having substantially the same meaning except for an error.
D _y1 = d _y2
D _y3 = d _x3
D _y1 (= d _y2 ) = e _1
Dx1 > _dx2
・ E ₂ > d _{x1
· D y3 (= d x3)} = b y2 (= b x2)
・ E ₂ > e ₁

As described above, the embedding member 23 of the present embodiment is an annular column material having the hole 23b (elliptical hole) formed in the center, but the hole 23b (elliptical hole) is embedded from the relational expression of dx2 <dx1. It is eccentric with respect to the center of the member 23 .
Then, as shown in FIG. 5 (c), a fastening area 23c through which the fastening material passes is formed in the wide area WA formed by the eccentricity. As described later with reference to FIG. 7, in the present embodiment, the fastening region 23c is a screw hole, and a screw passes through the fastening region 23c as a fastening material described later.
As described above, in the present embodiment, the height (the size in the Z direction) of the embedding member 23 and the depth (the size in the Z direction) of the annular concave portion 21 are substantially the same.
The columnar island 22 located at the center of the embedded member 23 is also flush with the upper surface of the embedded member 23.

Next, with reference to FIG. 6, the form of connection with the neck 10 at the connection portion α of the present embodiment will be described in detail. Here, FIG. 6B shows an EE cross section in FIG. 6A. Note that, for simplification of the description and the like, a fastening material is omitted in FIG.
As is clear from the figure, the connection portion β of the neck 10 contacts the connection portion α of the body 20, and the neck 10 and the body 20 are fastened via a known fastening material. Therefore, in the present embodiment, one or a plurality of screw holes are provided in the connection portion β of the neck 10, and the number of the screw holes matches the number of the screw holes in the fastening region 23c.

More specifically, the neck 10 and the body 20 are fastened so that the neck 10 covers at least a part of the columnar island portion 22 (the portion forming the step portion 24) of the body 20 surrounded by the embedding member 23. Have been. In other words, as shown in FIG. 6A, the neck 10 is fastened to the embedding member 23 of the body 20 such that at least a part of the upper surface F2 of the columnar island portion 22 contacts the connection site β of the neck 10. Have been.
Thereby, the sound conductivity can be improved by contacting the neck 10 with the portion having the second hardness of the body 20.
Therefore, it can be said that the “connection portion α” in the present embodiment may include the upper surface F2 of the columnar island portion 22. Of course, the present embodiment is not limited to the above-described contact form, and for example, a form in which the connection portion β of the neck 10 does not contact the upper surface F2 of the columnar island portion 22 may be used.

Here, as is clear from FIG. 6B, in the present embodiment, since the step portion 24 is formed in the body 20, the upper surface F1 of the embedding member 23 , the columnar island portion except for the region corresponding to the connection portion α. The upper surface F2 of the upper surface 22 and the upper surface F3 of the body 20 have substantially the same height (flat) (bx2 = dx3 = ax3).
On the other hand, at the connection portion α, the upper surface F1 ′ of the embedding member 23, the upper surface F2 ′ of the columnar island portion 22, and the upper surface F3 ′ of the body 20 are flush with each other (these surfaces are the body portions other than the connection portion α). 20 is lower than the upper surface F3 by Z1).
As shown in the figure, the size of the step portion 24 in the X direction has a length of Z2 in the X direction from the end of the body 20 in the −X direction. The size of the step portion 24 in the Y direction is at least larger than the width of the embedding member 23 in the Y direction. Further, the depth of the step portion 24 has a size of Z1 from the upper surface F3 of the body 20.
The values of Z1 and Z2 are not particularly limited. For example, Z1 can be set to 10 to 30 mm, and Z2 can be set to 50 to 100 mm.

Next, an assembling mode of the guitar 100 of the present embodiment will be described with reference to FIG.
As described above, in the guitar 100 of the present embodiment, the connection portion β of the neck 10 and the connection portion α of the body 20 are connected via the known fastening material S. More specifically, as shown in the figure, a screw as an example of the fastening material S is inserted from the back surface of the body 20, and this screw passes through the embedding member 23 and is screwed into the connection portion β of the neck 10. Fastened to the hole.
The manner in which the neck 10 and the body 20 are fastened is not limited to the above, and the connection portion β and the connection portion α may be fixed using, for example, a known adhesive as a fastening material.

In the first embodiment described above, the relatively hard neck 10 is not directly fixed to the soft body 20, but is connected to the hard embedding member 23 buried in the body 20. The body 20 and the neck 10 are connected via 23. Therefore, since the neck 10 is fastened to the embedding member 23 embedded in the annular concave portion 21 of the body 20, the neck 10 and the body 20 can be firmly fixed.
The degree of sound (vibration) attenuation is determined by locking one of the strings to a neck made of hard material (such as maple material) and the other to a body made of soft material (such as Tenryu cedar) via a bridge or the like. It is possible to suppress and improve the sustain. This makes it possible to express a gentle and original sound.
In the guitar 100 of the present embodiment, the hole 23 b is formed in the embedded member 23, and the columnar island 22 of the body 20 is inserted into the hole 23 b of the embedded member 23 (the columnar island 22 is They are in contact with each other (surrounded by the embedded member 23 ). Thus, the body 20 can be made of a member having the second hardness as much as possible, and sound with improved sustain can be exhibited.

<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to FIG.
In the first embodiment, the body 20 has the step portion 24. However, the present embodiment is mainly characterized in that the upper surface of the body 20 is uniform except for the annular concave portion 21 and the columnar island portion 22.
Therefore, differences from the first embodiment will be mainly described below, and elements having the same configurations or functions as those of the first embodiment will be denoted by the same reference numerals and description thereof will be appropriately omitted. In addition, for simplification of the description, illustration of the fastening material is omitted in FIG.

That is, as shown in FIG. 8, the surface (upper surface F3) of the body 20 on which the embedding member 23 is embedded has the same height as the upper surface of the columnar island portion 22 and the upper surface of the embedding member 23. I have. In other words, the upper surface F1 ′ of the embedding member 23, the upper surface F2 ′ of the columnar island portion 22, and the upper surface F3 ′ of the body 20 in the connection portion α described in the first embodiment become embedded members outside the connection portion α. 23, the upper surface F2 of the columnar island portion 22, and the upper surface F3 of the body 20.
As described above, the height of the upper surface of the body 20 is uniform, and there is no configuration corresponding to the step portion 24.
In the present embodiment, the connection portion α used for connection with the neck 10 is also provided at the -X direction end of the body 20 so as to cover a part of the upper surface of the columnar island portion 22 and a part of the upper surface of the embedding member 23. It extends to only the magnitude + X direction Z ₂ from parts.
Although no particular limitation on the value of _{Z 2,} for example, a _{Z 2} can be 50 to 100 mm.

  According to the second embodiment described above, at least a part of the base end portion 12 of the neck 10 is not buried in the step portion 24 of the body 20, so that the appearance of the guitar 100 has an improved unevenness compared to the guitar 100. Can be different.

Each embodiment described above can be variously modified without departing from the spirit of the present invention. Hereinafter, modified examples that can be appropriately applied to each embodiment will be described. In the following modified examples, components having the same functions and actions as those of the above-described configuration are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
<Modification>
In each of the above-described embodiments, the annular concave portion 21 has a rectangular shape with four rounded corners when viewed from above in the Z direction. However, the annular concave portion 21 is not limited to this form, and for example, the following deformation is possible.

That is, first, in the annular concave portion 21 and the embedding member 23, the hole 23b may be arranged at the center without being eccentric with respect to the center of the embedding member 23 . Thus, the hole 23b of the embedding member 23 does not necessarily need to be eccentric, and does not need to be eccentric as long as the arrangement area of the fastening material can be secured.
Second, the shape of the annular concave portion 21 and the embedding member 23 is not limited to a rectangular shape as viewed from above in the Z direction, and may be, for example, a triangular shape (that is, a triangular prism shape as a whole). In this case, the orientation is preferably such that the base of the triangle is located on the end side in the −X direction.
Third, the corners of the annular concave portion 21 and the embedding member 23 do not necessarily have to be rounded, and may have, for example, a substantially right-angled corner.

Further, in the first embodiment described above, when the step portion 24 is formed, a part of each of the columnar island portion 22 and the embedding member 23 is cut off, but the present invention is not limited to this mode. For example, the annular concave portion 21, the columnar island portion 22, and the embedding member 23 may be formed smaller than in the first embodiment, and all of them may be accommodated in the step portion 24.
A guitar having a structure other than the illustrated one may be configured by appropriately combining the elements of the embodiments and the modified examples described above with combinations other than those described above.

  INDUSTRIAL APPLICABILITY The present invention is suitable for constructing a guitar that can be easily assembled with a strong structure while expressing a gentle sound.

Reference Signs List 10 neck 11 tip 12 base 20 body 21 annular recess 22 columnar island 23 embedding member 23a body 23b hole 23c fastening region 24 stepped portion 100, 200 guitar α connection portion β connection site S fastening material F1 embedded member 23 Upper surface F2 Upper surface of columnar island portion 22 Upper surface of body 20

Claims (5)

A neck formed by a member having a first hardness;
A body formed of wood having a second hardness lower than the first hardness, having a connection portion connected to the neck,
The connection portion has an annular concave portion having a columnar island formed by shaving a part of the body, and is embedded in the annular concave portion so as to surround the columnar island and has a hardness higher than the second hardness. A guitar comprising: an embedding member. Further comprising a fastening material for fastening the neck and the body,
2. The guitar according to claim 1, wherein the fastening member fastens the embedded member and the neck of the connection portion. 3. The guitar according to claim 1 or 2, wherein the neck and the body are fastened so that the neck covers at least a part of a columnar island portion of the body surrounded by the embedded member . A step is formed in which at least a part of the embedding member and the columnar island is depressed with respect to an upper surface of the body,
The guitar according to any one of claims 1 to 3, wherein a part of the neck is buried in the step, and a remaining part of the neck protrudes from an upper surface of the body. The embedding member ,
An elliptical hole is an annular column material formed in the center, the elliptical hole being eccentric with respect to the center of the embedding member ,
The guitar according to any one of claims 1 to 4, wherein the fastening material is disposed in a wide area formed by the eccentricity.