Body structure of electric guitar and electric guitar
The electric guitar body structure with interconnected chambers and slits addresses the challenge of controlling acoustic phenomena, achieving resonant sound quality and rigidity by forming composite chambers with varied resonant frequencies.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2025-01-30
- Publication Date
- 2026-05-18
AI Technical Summary
Existing electric guitars with multiple chambers face challenges in controlling acoustic phenomena due to equal resonance frequencies, making it difficult to achieve a beautifully resonant sound.
A body structure with first and second chambers connected by a slit that does not open to the outside, forming a composite chamber with controlled resonant frequencies through volume manipulation and sound-absorbing materials.
The solution allows for controlled acoustic phenomena, producing a beautifully resonant sound while maintaining body rigidity and reducing weight.
Smart Images
Figure 0007860552000001 
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Figure 0007860552000003
Abstract
Description
Technical Field
[0001] The present invention relates to a body structure of an electric guitar and an electric guitar.
Background Art
[0002] Patent Document 1 discloses a technique in which a plurality of grooves are provided inside a body plate of a hollow body of a stringed instrument such as an acoustic guitar or a violin, so that a beautiful and resonant sound can be played. A beautiful and resonant sound can be obtained by appropriately controlling the acoustic phenomenon of the body.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] By the way, some bodies such as electric guitars have a plurality of chambers (hollows) for weight reduction inside them. However, when there are a plurality of chambers having substantially the same volume in this type of body, the resonance frequencies of the plurality of chambers become substantially equal, so that control of the acoustic phenomenon of the body becomes necessary. Even if a plurality of grooves as in Patent Document 1 are provided on the inner surface of the chamber of the body of an electric guitar, it is difficult to control the acoustic phenomenon of the body.
[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a body structure of an electric guitar capable of controlling the acoustic phenomenon of a body having a plurality of chambers and an electric guitar provided with the same.
Means for Solving the Problems
[0006] A first aspect of the present invention provides a body having a first chamber and a second chamber formed at a distance from each other, and a slit connecting the first chamber and the second chamber, wherein the first chamber, the second chamber and the slit are cavities that do not open to the outside of the body. Furthermore, it is a closed space that does not communicate with the outside of the body. It is the body structure of an electric guitar.
[0007] A second aspect of the present invention is an electric guitar comprising the body structure described above. [Effects of the Invention]
[0008] According to the present invention, it is possible to control the acoustic phenomena of an electric guitar body having multiple chambers. [Brief explanation of the drawing]
[0009] [Figure 1] This is a plan view of an electric guitar according to one embodiment of the present invention, as seen from the front of the body. [Figure 2] Figure 1 is a plan view of the back component of the electric guitar body, as seen from the front. [Figure 3] Figure 2 is an enlarged perspective view showing the two chambers and slits in the back member. [Figure 4] This is an enlarged plan view showing the main parts of the body of an electric guitar according to another embodiment of the present invention. [Modes for carrying out the invention]
[0010] An embodiment of the present invention will be described below with reference to Figures 1-3. As shown in Figure 1, the electric guitar 1 according to this embodiment comprises a body structure 2, a neck 3, and strings 4. The neck 3 is connected to the end of the body structure 2 and extends away from the body structure 2 (upward in Figure 1). The head 5, which forms the longitudinal end of the neck 3, is provided with a peg 6 around which the end of the string 4 is wound. The string 4 is stretched along the longitudinal direction of the neck 3.
[0011] The body structure 2 comprises a body 20. In this embodiment, the body 20 constitutes the entire body structure 2. A bridge 7, an electromagnetic pickup 8, a controller, and the like are attached to the body 20. The bridge 7, the electromagnetic pickup 8, and the controller are exposed on the front surface 20a (hereinafter referred to as the front surface 20a) of the body 20, which faces in the thickness direction of the body 20 (the direction perpendicular to the plane of the paper in Figure 1). One end of string 4 is attached to the bridge 7. The electromagnetic pickup 8 is located between the neck 3 and the bridge 7 along the longitudinal direction of the neck 3. Multiple electromagnetic pickups 8 (two in the illustrated example) are arranged along the longitudinal direction of the neck 3. The controller adjusts the volume, tone, etc., of the sound signal output from the electromagnetic pickup 8. The controller includes two volume switches 9 and a pickup selector 10 for switching which electromagnetic pickup 8 to activate.
[0012] The body 20 of this embodiment has a top member 21 with a small thickness dimension and a back member 22 (see Figures 2 and 3) with a larger thickness dimension than the top member 21. The top member 21 and the back member 22 overlap in the thickness direction of the body 20 to constitute the body 20. The front surface 20a of the body 20, where the bridge 7 and the like are exposed, is formed by the top member 21.
[0013] As shown in Figures 2 and 3, the body 20 has a plurality of chambers 24 (19 in the illustrated example) and slits 25. The multiple chambers 24 are cavities formed to reduce the weight of the body 20. The multiple chambers 24 are formed with space between them. Specifically, the multiple chambers 24 are arranged in a direction perpendicular to the thickness direction of the body 20. When viewed from the thickness direction of the body 20, the multiple chambers 24 are formed in the area of the body 20 other than the area where the neck 3, bridge 7, electromagnetic pickup 8, controller (see Figure 1), etc., are attached. Although not shown in Figure 2, holes and recesses for housing the bridge 7, electromagnetic pickup 8, and controller are also formed in the body 20.
[0014] In this embodiment, each of the multiple chambers 24 is formed recessed from the front surface 22a of the back member 22 facing the top member 21. By overlapping the top member 21 with the front surface 22a of the back member 22, each of the multiple chambers 24 becomes a cavity that does not open to the outside of the body 20.
[0015] The slit 25 connects two adjacent chambers 24 (the first chamber 24A and the second chamber 24B) from among the multiple chambers 24. Like the chambers 24, the slit 25 does not open to the outside of the body 20. The slit 25 extends in the direction of the alignment of the two chambers 24. The direction in which the slit 25 extends may be parallel to or inclined with respect to the alignment of the two chambers 24.
[0016] The cross-sectional area of the slit 25 perpendicular to the alignment direction of the two chambers 24 is smaller than the individual cross-sectional areas of the two chambers 24 perpendicular to the alignment direction of the two chambers 24. The cross-sectional area of each chamber 24 used for comparison with the cross-sectional area of the slit 25 may be, for example, the cross-sectional area of the chamber 24 that is the largest in the alignment direction of the two chambers 24. The volume of slit 25 is sufficiently small compared to the volume of each of the two chambers 24.
[0017] The number of slits 25 connecting the two chambers 24 may be 1 or two or more (plural). When the number of slits 25 is plural, the total cross-sectional area of the plurality of slits 25 is smaller than the cross-sectional area of each of the two chambers 24. Also, the total volume of the plurality of slits 25 is sufficiently small compared to the volume of each of the two chambers 24.
[0018] Similar to the chamber 24, the slit 25 of the present embodiment is formed by being recessed from the front surface 22a of the back member 22. In FIG. 3, the depth dimension of the slit 25 is the same as the depth dimension of the chamber 24, but may be smaller than the depth dimension of the chamber 24, for example. Also, the slit 25 may be formed so as not to open to the front surface 22a of the back member 22, for example.
[0019] The volumes of the two chambers 24 (the first chamber 24 and the second chamber 24) connected to each other by the slit 25 may be, for example, substantially the same. The fact that the volumes of the two chambers 24 are substantially the same means that, for example, the ratio of the volume of the second chamber 24 to the volume of the first chamber 24 is 70% or more and 130% or less.
[0020] By connecting the two chambers 24 to each other by the slit 25, a new chamber 26 (hereinafter referred to as a composite chamber 26) including these two chambers 24 and the slit 25 is formed. The volume of the composite chamber 26 is larger than the volume of each of the two chambers 24.
[0021] The above-described chamber 24 and slit 25 will be described more specifically. As shown in FIG. 2, the 19 chambers 24 (24A to 24S) are arranged so as to generally follow the edge of the back member 22 as viewed from the front surface 22a side. In the following description, the chambers 24A located at the upper right of the back member 22 (body 20) to the chamber 24S located at the upper left are numbered 1, 2,... 18, 19 in order generally clockwise.
[0022] In Figure 2, the first and second chambers 24A and 24B, located in the upper right portion of the back member 22 (body 20), are connected by two slits 25Aa and 25Ab, as shown in Figures 2 and 3. This forms a composite chamber 26A that includes the first and second chambers 24A and 24B and the two slits 25Aa and 25Ab. The two slits 25Aa and 25Ab are arranged in the width direction, which is perpendicular to the arrangement direction of the first and second chambers 24A and 24B and the thickness direction of the back member 22 (body 20). The two slits 25Aa and 25Ab are located at both ends of the first and second chambers 24A and 24B in the width direction.
[0023] As shown in Figure 2, the configurations in which chambers 6 and 7, 24F and 24G, are connected by a slit 25F to form a composite chamber 26F, the configuration in which chambers 12 and 13, 24L and 24M, are connected by a slit 25L to form a composite chamber 26L, the configuration in which chambers 15 and 16, 24O and 24P, are connected by a slit 25O to form a composite chamber 26O, and the configuration in which chambers 18 and 19, 24R and 24S, are connected by a slit 25R to form a composite chamber 26R are all the same as the configuration in which chambers 1 and 2, 24A and 24B, are connected by slits 25Aa and 25Ab to form a composite chamber 26A.
[0024] Chambers 3 and 4, 24C and 24D, are connected by a single slit 25C. This forms a composite chamber 26C that includes chambers 3 and 4, 24C and 24D and the single slit 25C. The single slit 25C is located midway between chambers 3 and 4, 24C and 24D in the width direction, which is perpendicular to the arrangement direction of chambers 3 and 4, 24D and the thickness direction of the back member 22 (body 20). The slit 25C may also be located at the ends of chambers 3 and 4, 24C and 24D in the width direction, for example.
[0025] Chamber 10, 24J, is connected to Chamber 9, 24I, and Chamber 11, 24K, located on either side of it, by slits 25I and 25J, respectively. In other words, the three chambers 9 through 11, 24I through 24K, are connected by slits 25I and 25J. This forms a composite chamber 26I that includes Chambers 9 through 11, 24I through 24K, and slits 25I and 25J. The configurations in which Chambers 9 and 10, 24I and 24J, are connected by slit 25I, and the configurations in which Chambers 10 and 11, 24J and 24K, are the same as the configuration in which Chambers 1 and 2, 24A and 24B, are connected by slits 25Aa and 25Ab.
[0026] Chambers 24E, 24H, 24N, and 24Q, numbers 5, 8, 14, and 17, are not connected to any other chambers 24.
[0027] As described above, according to the body structure 2 of this embodiment and the electric guitar 1 equipped therewith, by connecting two chambers 24 with a slit 25, the volume of the composite chamber 26, which includes the two chambers 24 and the slit 25, becomes larger than the individual volumes of the two chambers 24. Consequently, the resonant frequency of the composite chamber 26 is lower than the individual resonant frequencies of the two chambers 24. In other words, by controlling the volumes of the chambers 24 and 26, the resonant frequencies of multiple chambers 24 and 26 formed in the body 20 can be made to differ from each other. For example, two chambers 24 with approximately the same volume have approximately the same resonant frequency, but by connecting these two chambers 24 with a slit 25, the number of chambers 24 having approximately the same resonant frequency can be reduced. This allows for control over the acoustic phenomena of the body 20. Therefore, even with the body 20 of the electric guitar 1, which has multiple chambers 24 for weight reduction, it is possible to produce a beautifully resonant sound.
[0028] Furthermore, in the body structure 2 of this embodiment, the cross-sectional area of the slit 25 connecting the two chambers 24 is smaller than the cross-sectional area of each of the two chambers 24. This makes it possible to secure a large-volume chamber (i.e., a composite chamber 26) while suppressing a decrease in the rigidity of the body 20.
[0029] Furthermore, in the body structure 2 of this embodiment, the resonant frequency of the composite chamber 26, which includes the two chambers 24 and the slits 25, can be controlled by appropriately changing the number of slits 25 connecting the two chambers 24. This makes it possible to control the acoustic phenomena of the body 20.
[0030] Although the present invention has been described in detail above, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
[0031] In the present invention, the body structure 2 may have sound-absorbing material 27 housed in a slit 25, as shown in Figure 4, for example. The sound-absorbing material 27 is a sound-absorbing material such as urethane foam. In such a configuration, the resonance frequency of the composite chamber 26, which includes two chambers 24 and a slit 25 connecting them, can be controlled by the sound-absorbing material 27. This makes it possible to control the acoustic phenomena of the body 20.
[0032] In the present invention, the cross-sectional area of the slit 25 may be the same as, for example, the cross-sectional area of each of the two chambers 24. [Explanation of symbols]
[0033] 1…Electric guitar, 2…Body structure, 20…Body, 24…Chamber, 25…Slit, 27…Sound-absorbing material
Claims
1. The body comprises a first chamber and a second chamber formed at a distance from each other, and a slit connecting the first chamber and the second chamber. The body structure of an electric guitar, wherein the first chamber, the second chamber, and the slit are cavities that do not open to the outside of the body and are closed spaces that do not communicate with the outside of the body.
2. The body structure of an electric guitar according to claim 1, wherein the cross-sectional area of the slit perpendicular to the arrangement direction of the first chamber and the second chamber is smaller than the cross-sectional area of the first chamber and the second chamber perpendicular to the arrangement direction.
3. The body structure for an electric guitar according to claim 1 or claim 2, wherein the ratio of the volume of the second chamber to the volume of the first chamber is 70% or more and 130% or less.
4. The body has a top member and a back member that overlap in the thickness direction of the body to constitute the body. The body structure for an electric guitar according to any one of claims 1 to 3, wherein the thickness dimension of the back member is greater than the thickness dimension of the top member.
5. The first chamber is a first recess that is recessed from the front surface of the back member facing the top member, The body structure of an electric guitar according to claim 4, wherein the second chamber is a second recess that is recessed from the front surface of the back member opposite the top member.
6. The body structure of an electric guitar according to claim 5, wherein the slit is a third recess that is recessed from the front surface of the back member facing the top member.
7. The body structure of an electric guitar according to claim 6, wherein the depth dimension of the third recess is the same as the depth dimension of the first recess and the depth dimension of the second recess.
8. The body structure of an electric guitar according to claim 6, wherein the depth dimension of the third recess is smaller than the depth dimension of the first recess and the depth dimension of the second recess.
9. The body structure for an electric guitar according to any one of claims 5 to 8, wherein a non-recessed portion that is not recessed from the front surface of the back member is provided between the first recess and the second recess.
10. The aforementioned slit includes a first slit and a second slit positioned at a distance from the first slit. The body structure of an electric guitar according to claim 9, wherein the non-recessed portion is arranged between the first slit and the second slit.
11. The body structure of an electric guitar according to any one of claims 1 to 10, wherein a composite chamber is formed by the first chamber, the second chamber and the slit.
12. An electric guitar comprising the body structure described in any one of claims 1 to 11.