Musical instrument, method for forming sound hole for musical instrument, and reinforcing member

Abstract

This musical instrument comprises: a housing that has a first opening; and a reinforcing member that reinforces the housing and that has a second opening which overlaps the first opening and which is for projecting sound generated in the interior of the housing to the outside of the housing.

Description

Technical Field

[0001] The present disclosure relates to musical instruments, a method for forming sound holes for musical instruments, and reinforcing members. This application claims priority based on Japanese Patent Application No. 2021-114192 filed on July 9, 2021, and incorporates the entire disclosure thereof herein.

Background Art

[0002] Musical instruments such as electronic organs and electronic pianos have sound sources such as speakers inside the housing. In this type of musical instrument, sound is generated from the sound source in response to an operation of the musical instrument by a performer (for example, an operation of a key), and is emitted outside the housing. Patent Document 1 discloses a musical instrument in which an opening for sound emission (tone escape portion) is formed in a member constituting the upper surface of the housing. Patent Document 2 discloses a keyboard instrument that uses the gap between the keys as an opening for sound emission (tone escape). By providing an opening for sound emission as in Patent Documents 1 and 2, it is intended to emit the sound generated at the sound source from the housing in various directions, allowing the performer and the audience to enjoy a rich and powerful performance sound.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In conventional musical instruments, a reinforcing member that reinforces the housing by joining the members of the housing may interfere with the sound emission from the inside of the housing to the outside. For this reason, in conventional musical instruments, the sound generated at the sound source inside the housing is not effectively utilized, and there is room for improvement in order to allow the performer and the audience to enjoy a sufficiently rich and powerful performance sound.

[0005] The present disclosure has been made in view of the above circumstances. An example of the object of the present disclosure is to provide a musical instrument and a method for forming a sound emission hole for a musical instrument that can more effectively utilize the sound generated inside the housing and enable a performer and an audience to enjoy a rich and powerful performance sound.

Means for Solving the Problems

[0006] The first aspect of the present disclosure includes a housing having a first opening, and a reinforcing member that reinforces the housing and has a second opening that overlaps the first opening and emits the sound generated inside the housing to the outside of the housing. , the housing has a plurality of members including a first member and a second member adjacent to each other, and the reinforcing member couples the first member and the second member to each other It is a musical instrument.

[0007] The second aspect of the present disclosure prepares a housing having a first opening, reinforces the housing, prepares a reinforcing member having a second opening, and forms a hole for emitting the sound generated inside the housing to the outside of the housing by overlapping the second opening with the first opening. This is a method for forming a sound emission hole for a musical instrument. and has a plurality of members including a first member and a second member adjacent to each other and and couples the first member and the second member to each other includes

Advantages of the Invention

[0009] According to the present disclosure, the sound generated inside the housing of the musical instrument can be more effectively utilized, and a performer and an audience can enjoy a rich and powerful performance sound.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0011] Hereinafter, an embodiment of the present disclosure will be described with reference to FIGS. 1 to 7. As shown in FIGS. 1 to 3, the musical instrument 1 includes a housing 2 and a reinforcing member (member) 41. The musical instrument 1 of the present embodiment further includes a keyboard unit 6, a keyboard cover 7, and a speaker 8 (sound source). The keyboard unit 6 is configured by arranging a plurality of keys 61 in one direction (X-axis direction). The musical instrument 1 of the present embodiment may be, for example, a synthesizer that generates various sounds using an electronic circuit.

[0012] In the following description, the Z-axis direction in the drawings may be referred to as the vertical direction. Also, the positive Z-axis direction in the drawings may be referred to as upward, and the negative Z-axis direction may be referred to as downward. Further, the direction in which a plurality of keys 61 are arranged and which is orthogonal to the vertical direction (X-axis direction) may be referred to as the left-right direction, and the direction orthogonal to the vertical direction and the left-right direction (Y-axis direction) may be referred to as the front-back direction. Also, the positive Y-axis direction in the drawings may be referred to as the front, and the negative Y-axis direction may be referred to as the back.

[0013] The housing 2 has a space S (hereinafter referred to as the internal space S) inside. The housing 2 has a plurality of members 21. In the present embodiment, the plurality of members 21 include a bottom plate 21A, a top plate 21B (first member), a back plate 21C (second member), side plates 21D, a front upper plate 21E, and a mouth bar 21F.

[0014] As shown in FIG. 3, the bottom plate 21A is arranged such that its thickness direction faces the vertical direction, and constitutes the bottom surface 21Aa of the housing 2. The keyboard unit 6 is arranged above and in the front side of the bottom plate 21A. The upper panel 21B (roof) is positioned at a distance above the lower panel 21A such that its thickness direction is along the vertical direction. The upper panel 21B covers only the rear portion of the lower panel 21A from above and is arranged so as not to cover the keyboard section 6. The upper panel 21B constitutes the upper surface 21Ba of the housing 2.

[0015] The rear panel 21C (rear frame) is arranged at the rear ends of the lower panel 21A and the upper panel 21B such that its thickness direction is along the front-rear direction. The rear panel 21C constitutes the rear surface 21Ca of the housing 2. In the present embodiment, the rear panel 21C is arranged so as to cover the rearward end face of the lower panel 21A. Further, as shown in FIG. 4, the upper end face 21Cc (hereinafter referred to as the upper end face 21Cc) of the rear panel 21C is covered by the upper panel 21B. The rear end of the upper panel 21B protrudes rearward more than the rear panel 21C.

[0016] As shown in FIG. 3, the upper front panel 21E is arranged below the front end portion of the upper panel 21B such that its thickness direction is along the front-rear direction. The upper front panel 21E is arranged between the upper panel 21B and the keyboard cover 7 in the vertical direction. The upper front panel 21E covers the gap between the upper panel 21B and the keyboard cover 7 from the front side.

[0017] The mouth bar 21F is arranged at the front end side of the lower panel 21A and the keyboard section 6 such that its thickness direction is along the front-rear direction and extends upward from the lower panel 21A to the keyboard section 6. The mouth bar 21F covers the gap between the lower panel 21A and the keyboard section 6 from the front side.

[0018] As shown in FIGS. 1 to 3, the side panels 21D are arranged at both ends of the housing 2 in the left-right direction such that their thickness directions are along the left-right direction. The side panels 21D constitute the side surfaces 21Da of the housing 2. The side panels 21D cover both the left and right ends in the left-right direction of the lower panel 21A, the rear panel 21C, the upper front panel 21E, and the mouth bar 21F. The upper end faces of the side panels 21D are covered by the upper panel 21B.

[0019] As shown in FIG. 3, the keyboard cover 7 is movable between a cover position P1 that covers the upper side of the keyboard unit 6 and a retracted position P2 that does not cover the keyboard unit 6 (the upper side of the keyboard unit 6). In the present embodiment, the keyboard cover 7 is positioned between the keyboard unit 6 and the upper front plate 21E in the vertical direction and moves in the front-rear direction between the cover position P1 and the retracted position P2. The keyboard cover 7 disposed at the retracted position P2 is disposed in the internal space S of the housing 2 and covered by the top plate 21B from above.

[0020] The speaker 8 is disposed inside the housing 2 and outputs sound according to an input signal. The input signal input to the speaker 8 may be, for example, a signal corresponding to an operation of the keyboard unit 6. The speaker 8 is disposed such that sound is radiated to both the outside of the housing 2 and the internal space S of the housing 2. A through hole 211 is formed in the bottom plate 21A of the housing 2. The speaker 8 is disposed at the through hole 211 of the bottom plate 21A or in the vicinity of the through hole 211 such that the sound generated by the speaker 8 is radiated downward of the housing 2 through the through hole 211. In the speaker 8 disposed in this manner, the sound generated by the speaker 8 also propagates above the speaker 8 in the internal space S of the housing 2. As shown in FIGS. 1 and 2, two speakers 8 are disposed at positions spaced apart from each other in the left-right direction.

[0021] As shown in FIGS. 2 to 4 and 6, an opening 23 (first opening) penetrating the housing 2 is formed in the housing 2. The opening 23 of the housing 2 communicates the internal space S of the housing 2 with the space outside the housing 2. In the present embodiment, the opening 23 of the housing 2 is formed between the top plate 21B and the back plate 21C. Therefore, the opening 23 of the housing 2 faces the rear of the housing 2.

[0022] A recess 213 is formed in the flat upper end surface 21Cc of the back plate 21C. The opening 23 of the housing 2 is configured by bringing the upper end surface 21Cc in which the recess 213 is formed into surface contact with the lower surface (inner surface 21Bb described later) of the top plate 21B. The opening 23 (recess 213) of the housing 2 is formed in a horizontally long shape in which the dimension in the left-right direction is sufficiently longer than the dimension in the vertical direction. In the present embodiment, the two openings 23 of the housing 2 are arranged at positions spaced apart from each other in the left-right direction. The positions of the two openings 23 in the left-right direction correspond to the positions of the two speakers 8 arranged at intervals in the left-right direction, respectively.

[0023] The reinforcing member 41 is a member for reinforcing the housing 2. The reinforcing member 41 in the present embodiment is a coupling member 41 that constitutes the housing 2 and couples two adjacent members 21 to each other (hereinafter, the reinforcing member 41 may be referred to as the coupling member 41). As illustrated in FIG. 3, the coupling member 41 includes a first coupling member 41A, a second coupling member 41B, a third coupling member 41C, a fourth coupling member 41D, and a fifth coupling member 41E. The first coupling member 41A couples the top plate 21B and the back plate 21C. The second coupling member 41B couples the bottom plate 21A and the back plate 21C. The third coupling member 41C couples the bottom plate 21A and the side plate 21D. The fourth coupling member 41D couples the back plate 21C and the side plate 21D. The fifth coupling member 41E couples the top plate 21B and the front upper plate 21E.

[0024] As shown in FIGS. 4 to 7, the first coupling member 41A is formed in an L shape having a first flat plate portion 42 and a second flat plate portion 43. The first flat plate portion 42 and the second flat plate portion 43 are orthogonal to each other. In the first coupling member 41A, the first flat plate portion 42 and the second flat plate portion 43 are each formed in a belt plate shape. In other words, the first flat plate portion 42 and the second flat plate portion 43 are each formed in a belt shape, a plate shape, or a rectangular shape. The end in the width direction of the first flat plate portion 42 and the end in the width direction of the second flat plate portion 43 are connected.

[0025] As shown in FIGS. 4 and 5, the first coupling member 41A couples the top plate 21B and the back plate 21C by fixing the first flat plate portion 42 to the top plate 21B (first member) and the second flat plate portion 43 to the back plate 21C (second member). In the present embodiment, the first coupling member 41A is fixed inside the housing 2 so as to be less visible from the outside of the housing 2. Specifically, the first flat plate portion 42 is overlapped with the inner surface 21Bb of the top plate 21B facing the inside (lower side) of the housing 2 and fixed to the inner surface 21Bb of the top plate 21B by screwing or the like. The second flat plate portion 43 is overlapped with the inner surface 21Cb of the back plate 21C facing the inside (front side) of the housing 2 and fixed to the inner surface 21Bb of the top plate 21B by screwing or the like. The second to fifth coupling members 41B to 41E (see FIG. 3) are formed in the same L shape as the first coupling member 41A. Each of the second to fifth coupling members 41B to 41E couples the two adjacent members 21 of the housing 2 by being fixed to the inner surfaces of the two adjacent members 21 of the housing 2 in the same manner as the first coupling member 41A.

[0026] The first coupling member 41A has a sound emission hole 44 (second opening). The sound emission hole 44 is a hole for emitting the sound generated in the internal space S of the housing 2 to the outside of the housing 2. In the present embodiment, the sound generated in the internal space S of the housing 2 is the sound radiated from the speaker 8 (see FIG. 3) into the internal space S of the housing 2.

[0027] The first coupling member 41A is provided in the housing 2 with its sound emission hole 44 overlapping the opening 23 of the housing 2 described above. In the present embodiment, the opening 23 of the housing 2 is formed at a corner portion formed by the inner surface 21Bb of the top plate 21B and the inner surface 21Cb of the back plate 21C when viewed from the inside of the housing 2. For this reason, the sound emission hole 44 of the first coupling member 41A is formed at a corner portion formed by the first flat plate portion 42 and the second flat plate portion 43 corresponding to the corner portion formed by the inner surface 21Bb and the inner surface 21Cb described above. Specifically, the sound emission hole 44 is formed across the first flat plate portion 42 and the second flat plate portion 43.

[0028] As shown in FIGS. 5 to 7, the sound emission hole 44 is formed in a horizontally long shape in which the dimension in the left-right direction is sufficiently longer than the dimension in the vertical direction, similar to the opening 23 of the housing 2. The dimension of the sound emission hole 44 in the left-right direction is larger than the dimension of the opening 23 of the housing 2 in the left-right direction. Also, the dimension of the sound emission hole 44 in the vertical direction is larger than the dimension of the opening 23 of the housing 2 in the vertical direction. That is, the opening area of the sound emission hole 44 is larger than the opening area of the opening 23 of the housing 2. Note that the opening area of the sound emission hole 44 may be the same as the opening area of the opening 23 of the housing 2.

[0029] The first coupling member 41A is provided with reinforcing columns 45 that divide the sound emission hole 44 into a plurality of parts. In the present embodiment, the reinforcing columns 45 are provided so as to divide the sound emission hole 44, which has a long dimension in the left-right direction, into a plurality (three in FIGS. 5 to 7) in the left-right direction.

[0030] As shown in FIGS. 4 and 5, a sound emission hole 10 for emitting the sound generated inside the housing 2 to the outside of the housing 2 is formed by the sound emission hole 44 of the first coupling member 41A and the opening 23 of the housing 2 that overlaps the sound emission hole 44. Since the sound emission hole 10 of the present embodiment faces (is provided) toward the rear of the housing 2, the sound generated inside the housing 2 is emitted to the rear of the housing 2 through the sound emission hole 10.

[0031] As shown in FIGS. 4 to 6, the musical instrument 1 of the present embodiment further includes a cover member 9. The cover member 9 is formed in a sheet shape or a plate shape and covers the opening 23 of the housing 2 from the inside of the housing 2. The cover member 9 is formed so that the inside of the housing 2 is difficult to be seen from the outside through the opening 23 of the housing 2. Also, the cover member 9 is configured to be sound transmissive. The cover member 9 may be, for example, a non-woven fabric or a mesh member. Also, the cover member 9 may be configured by forming a large number of through-holes in a plate material, for example. The mesh size of the mesh member or the size of the through-holes formed in the plate material is preferably very small compared to, for example, the sound emission hole 44 of the reinforcing member 41 and the opening 23 of the housing 2.

[0032] The cover member 9 of the present embodiment is sandwiched between the inner surface of the housing 2 and the first coupling member 41A. Thereby, by simply fixing the first coupling member 41A to the inner surface of the housing 2, the cover member 9 can be fixed to the inner surface of the housing 2. Note that the cover member 9 may be arranged, for example, so as to sandwich the first coupling member 41A between itself and the inner surface of the housing 2. That is, the cover member 9 may be attached to the surface of the first coupling member 41A facing the internal space S side of the housing 2.

[0033] Next, in the musical instrument 1 of the present embodiment, an example of a method for forming a sound emission hole for a musical instrument (a method for forming a musical instrument, a method for manufacturing a musical instrument) that enables sound to be emitted to the outside of the housing 2 will be described. In order to form the sound emission hole 44 in the musical instrument 1, first, as shown in FIGS. 6 and 7, an opening 23 penetrating the housing 2 is formed in the housing 2. In the present embodiment, a recess 213 is formed in the flat upper end surface 21Cc of the back plate 21C. Further, by bringing the upper end surface 21Cc of the back plate 21C into surface contact with the inner surface 21Bb of the upper plate 21B, the opening 23 is formed in the housing 2. Also, a first coupling member 41A (reinforcing member 41) having the sound emission hole 44 is prepared. For example, a metal plate material is formed into a strip shape (strip shape, plate shape, or rectangular shape), and the sound emission hole 44 is formed by performing punching or the like on the plate material, whereby the first coupling member 41A may be manufactured. Further, by performing bending on the plate material, the first coupling member 41A formed in an L shape may be manufactured.

[0034] After forming the opening 23 in the housing 2 and preparing the first coupling member 41A, as shown in FIG. 5, the first coupling member 41A is provided on the housing 2. Specifically, the first flat plate portion 42 of the first coupling member 41A is overlapped and fixed to the inner surface 21Bb of the upper plate 21B of the housing 2. Also, the second flat plate portion 43 of the first coupling member 41A is overlapped and fixed to the inner surface 21Cb of the back plate 21C of the housing 2. At this time, the sound emission hole 44 of the first coupling member 41A is overlapped with the opening 23 of the housing 2. Thereby, the sound emission hole 10 is formed by the opening 23 of the housing 2 and the sound emission hole 44 of the first coupling member 41A that overlap each other. Thus, the method for forming the sound emission hole for the musical instrument is completed.

[0035] As described above, in the musical instrument 1 and the method for forming the sound emission hole for the musical instrument according to the present embodiment, the sound emission hole 44 of the first coupling member 41A (reinforcing member 41) for reinforcing the housing 2 of the musical instrument 1 overlaps with the opening 23 of the housing 2. Therefore, in the musical instrument 1 of the present embodiment, the sound generated inside the housing 2 can be emitted to the outside of the housing 2 through the sound emission hole 44 of the first coupling member 41A and the opening 23 of the housing 2 overlapping therewith. That is, the first coupling member 41A does not prevent the sound emission from the inside of the housing 2 to the outside. For this reason, the sound generated inside the housing 2 can be utilized more effectively, and the performer and the audience can enjoy a rich and powerful performance sound.

[0036] Further, in the musical instrument 1 of the present embodiment, the opening area of the sound emission hole 44 of the first coupling member 41A (reinforcing member 41) is larger than the opening area of the opening 23 of the housing 2. Therefore, even if the mounting position of the first coupling member 41A with respect to the housing 2 is displaced, it is possible to suppress a decrease in the opening area of the sound emission hole 10 formed by the sound emission hole 44 of the first coupling member 41A and the opening 23 of the housing 2. That is, the opening area of the sound emission hole 10 can be ensured.

[0037] Further, in the musical instrument 1 of the present embodiment, the sound emission hole 44 is formed in the first coupling member 41A that couples the two members 21 (the upper surface plate 21B and the back surface plate 21C) of the housing 2. Thereby, the first coupling member 41A can be utilized as a member for emitting sound to the outside of the housing 2.

[0038] In addition, in the musical instrument 1 of the present embodiment, the first coupling member 41A is formed in an L shape having a first flat plate portion 42 fixed to the inner surface 21Bb of the upper surface plate 21B (first member) and a second flat plate portion 43 fixed to the inner surface 21Cb of the back surface plate 21C (second member). Thus, even if the opening 23 of the housing 2 is formed at a portion straddling the upper surface plate 21B and the back surface plate 21C of the housing 2, by using one L-shaped first coupling member 41A having the sound emission hole 44 formed at a position corresponding to the opening 23, complication of the coupling structure of the members 21 of the housing 2 can be avoided. Specifically, by using the first coupling member 41A having the sound emission hole 44, the number of coupling members 41 to be used can be reduced and the coupling structure can be simplified as compared with the case where an L-shaped coupling member without the sound emission hole 44 is arranged so as to avoid the opening 23 of the housing 2. Further, the first coupling member 41A having the sound emission hole 44 is provided over the entire region of the inner surface of the housing 2 corresponding to the opening 23 of the housing 2. Therefore, the two members 21 of the housing 2 can be coupled more firmly.

[0039] In addition, in the musical instrument 1 of the present embodiment, the sound emission hole 44 is formed at a corner portion formed by the first flat plate portion 42 and the second flat plate portion 43 of the first coupling member 41A. Therefore, the sound emission hole 44 of the first coupling member 41A can be easily overlapped with the opening 23 of the housing 2 formed at the corner portion between the inner surface 21Bb of the upper surface plate 21B (first member) and the inner surface 21Cb of the back surface plate 21C (second member).

[0040] Further, when the sound emission hole 44 is formed at the corner portion formed by the first flat plate portion 42 and the second flat plate portion 43 of the first coupling member 41A, it becomes possible to maintain a good external design of the housing 2 (musical instrument 1). Hereinafter, this point will be described. The opening 23 of the housing 2 formed at the corner of the housing 2 can be made difficult to visually recognize from the outside of the housing 2 according to the relative arrangement of the top panel 21B and the back panel 21C that constitute the corner of the housing 2. Specifically, as shown in FIG. 4, the upper side of the opening 23 of the housing 2 formed between the top panel 21B and the upper end of the back panel 21C is covered by the rear end portion of the top panel 21B that projects rearward of the back panel 21C. That is, the projecting portion of the top panel 21B rearward functions as an eaves that covers the opening 23 of the housing 2 formed between the top panel 21B and the back panel 21C from above. Thereby, the opening 23 of the housing 2 becomes difficult to be visually recognized from the upper surface 21Ba side of the housing 2. Therefore, the sound emission hole 44 of the coupling member 41 corresponding to the opening 23 of the housing 2 formed between the top panel 21B and the back panel 21C of the housing 2 can also be made difficult to visually recognize from the outside of the housing 2. Therefore, the external design of the housing 2 (musical instrument 1) can be kept in good condition.

[0041] Further, the musical instrument 1 of the present embodiment is provided with a cover member 9 that is sound transmissible and covers the opening 23 of the housing 2 from the inside of the housing 2. Thereby, without the cover member 9 disturbing the sound emission from the inside of the housing 2 to the outside of the housing 2, it is possible to suppress the inside of the housing 2 from being visible from the outside of the housing 2 through the opening 23 of the housing 2 and the sound emission hole 44 of the first coupling member 41A by the cover member 9.

[0042] Also, in the musical instrument 1 of the present embodiment, the first coupling member 41A has a reinforcing column 45 that divides the sound emission hole 44 into a plurality of holes. Thereby, even if the size of the sound emission hole 44 is large, the rigidity of the first coupling member 41A can be ensured by the reinforcing column 45.

[0043] As described above, the present disclosure has been described in detail, but the present disclosure is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present disclosure.

[0044] In the musical instrument of the present disclosure, the opening 23 of the housing 2 penetrating the housing 2 is not limited to being formed between the top panel 21B and the back panel 21C. The opening 23 may be formed between any other two adjacent members 21 of the housing 2, for example, between the bottom panel 21A and the back panel 21C, between the bottom panel 21A and the side panel 21D, between the back panel 21C and the side panel 21D, between the top panel 21B and the front upper panel 21E. In this case, the sound emission holes 44 overlapping the opening 23 of the housing 2 may be formed in, for example, the second to fifth coupling members 41B to 41E. That is, the sound emission holes 10 composed of the opening 23 of the housing 2 and the sound emission holes 44 of the coupling member 41 may be directed forward or to the side of the housing 2.

[0045] In the musical instrument of the present disclosure, for example, the sound emission holes 44 may be formed in each of the first and second flat plates 42 and 43 of the coupling member 41 formed in an L shape. In this case, even if the openings 23 of the housing 2 are formed in each of two adjacent members 21 (the first member and the second member) of the housing 2, the sound emission holes 44 of the first and second flat plates 42 and 43 can be made to correspond to the respective openings 23, and two sound emission holes 10 can be formed. That is, it becomes possible to make the openings 23 of the housing 2 formed in two adjacent members 21 of the housing 2 correspond with one L-shaped coupling member 41. Therefore, complication of the coupling structure of the members 21 of the housing 2 can be avoided.

[0046] In the musical instrument of the present disclosure, the reinforcing member 41 in which the sound emission holes 44 are formed is not limited to the coupling member 41 that couples the members 21 of the housing 2. The reinforcing member 41 may be, for example, a member that reinforces one member 21 of the housing 2. In this case, the reinforcing member 41 may be provided on the housing 2 such that the sound emission holes 44 thereof overlap the opening 23 formed in one member 21 of the housing 2.

[0047] In the musical instrument of the present disclosure, the sound source disposed inside the housing 2 is not limited to the speaker 8 that generates sound by being electrically driven as in the above-described embodiment. The sound source may be, for example, a sound source that generates sound by being mechanically driven. Examples of such a sound source include a structure including strings like an acoustic piano and an action mechanism that strikes the strings to generate sound.

[0048] The musical instrument of the present disclosure is not limited to a keyboard instrument provided with a keyboard section, and can be applied to any musical instrument including a housing having an internal space and a reinforcing member for reinforcing the housing.

Industrial Applicability

[0049] The present disclosure may be applied to a musical instrument, a method for forming a sound emission hole for a musical instrument, and a reinforcing member.

Explanation of Signs

[0050] 1... Musical instrument 2... Housing 9... Cover member 10... Sound emission hole 21... Member of housing 2 21B... Top panel (first member) 21C... Rear panel (second member) 23... Opening (first opening) 41... Coupling member (reinforcing member) 41A... First coupling member 42... First flat plate portion 43... Second flat plate portion 44... Sound emission hole (second opening) 45... Reinforcing column S... Internal space

Claims

1. A housing having a first opening, a reinforcing member that reinforces the housing and has a second opening that overlaps the first opening and emits sound generated inside the housing to the outside of the housing, and comprising: the housing has a plurality of members including a first member and a second member adjacent to each other, the reinforcing member is an instrument that couples the first member and the second member to each other.

2. The instrument according to claim 1, wherein an area of the second opening is equal to or larger than an area of the first opening.

3. The reinforcing member is L-shaped and has a first flat plate portion and a second flat plate portion, the first flat plate portion is fixed to the first member, the second flat plate portion is fixed to the second member, the instrument according to claim 1 or claim 2.

4. The instrument according to claim 3, wherein the second opening is provided at a corner portion formed by the first flat plate portion and the second flat plate portion.

5. The instrument according to claim 1 or claim 2, further comprising a cover member configured to be permeable to the sound and covering the first opening from the inside of the housing.

6. The instrument according to claim 1 or claim 2, wherein the reinforcing member has reinforcing columns that divide the second opening into a plurality of openings.

7. The instrument according to claim 1 or claim 2, further comprising a speaker provided inside the housing and configured to generate the sound.

8. Prepare a housing having a first opening and having a plurality of members including a first member and a second member adjacent to each other, Prepare a reinforcing member that reinforces the housing, has a second opening, and couples the first member and the second member to each other, Forming a hole for emitting sound generated inside the housing to the outside of the housing by overlapping the second opening with the first opening. A method for forming a sound-emitting hole for a musical instrument, including the above.

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