Sound emission device, electronic musical instrument, and method for manufacturing a sound emission device

Abstract

To provide a sound emission apparatus that can be prevented or suppressed in generation of resonance by applying tension to a covering member while securing a distance between a sound emission opening of a sound emission unit and the covering member, and a manufacturing method of a sound emission apparatus.SOLUTION: A sound emission apparatus comprises: a loudspeaker 10; a first cover 50 including an opening areas 53 comprising a plurality of openings in a portion overlapping the loudspeakers 10; a second cover 60 arranged overlapping a front side of the first cover 50 and arranged to enclose the opening areas 53 of the first cover 50; and a saran net 70 covering the front sides of the first cover 50 and the second cover 60 and adhered to the second cover 60. Between the second cover 60 and the saran net 70, an area A1 excluding the periphery of the opening areas 53 of the first cover 50 in the second cover 60 is bonded with a first adhesive B1, and areas A2 in the periphery of the opening areas 53 of the first cover 50 in the second cover 60 are bonded with a second adhesive B2 having higher adhesion compared with the first adhesive B1.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a sound emitting device, an electronic musical instrument, and a method for manufacturing the sound emitting device.

Background Art

[0002] Conventionally, a covering member such as a saran net provided on the sound emitting side of a sound emitting device such as a speaker device in an acoustic device such as an electronic musical instrument and covering the sound emitting port has been proposed. For example, Patent Document 1 discloses a sound emitting structure in which a covering member that is acoustically transmissive is fixed to a sound emitting body. In this sound emitting structure, a groove portion for pushing a fixing member into the sound emitting body is provided. With the sound emitting body covered with the covering member, a part of the covering member is sandwiched between the groove portion and the fixing member, and the fixing member is pushed into the groove portion, thereby firmly fixing the covering member to the sound emitting body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a configuration in which the sound emitting side of a sound emitting device such as an electronic musical instrument is covered with a covering member, resonance generated between the sound emitting port and the covering member is a problem. The occurrence of such resonance is due to the state in which the space between the sound emitting port and the covering member is close or in contact, and the covering member provided at a position overlapping the sound emitting port is not under tension and is in a state where it is easily vibrated. In the sound emitting structure of Patent Document 1, although the covering member is firmly fixed and thus under tension, a sufficient gap is not ensured between the sound emitting port and the covering member, and there is a risk of resonance occurring.

[0005] The present invention aims to provide a sound-emitting device and a method for manufacturing a sound-emitting device that can prevent or suppress the occurrence of resonance by applying tension to a covering member while ensuring a gap between the sound-emitting port of the sound-emitting part of an electronic musical instrument or the like and the covering member, and an electronic musical instrument equipped with a sound-emitting device that can prevent or suppress the occurrence of resonance. [Means for solving the problem]

[0006] One embodiment of the present invention is a sound emission device comprising at least one sound emission unit, A first member having an opening region, Sound outlet of the aforementioned sound emission unit and the above opening area Set up so that they overlap The device comprises a first member, a second member provided so as to overlap the first member on the opposite side from the sound-emitting part, with an opening at a position corresponding to the sound-emitting port, and a covering member covering the opposite side of the first member and the second member, wherein the first member is It has a first opening corresponding to the opening region and a frame-shaped portion provided so as to surround the first opening, In the aforementioned opening region Before Contact the covering member The first opening is provided extending outwards from the frame-like portion, and a second adhesive is provided between the second member and the covering member in the region of the second member along the periphery of the opening region of the first member. .

[0007] Furthermore, an electronic musical instrument according to one aspect of the present invention is equipped with the above-described sound emission device. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a sound-emitting device and a method for manufacturing a sound-emitting device that can prevent or suppress the occurrence of resonance by applying tension to the covering member while ensuring a gap between the sound-emitting opening of the sound-emitting part and the covering member, as well as an electronic musical instrument equipped with a sound-emitting device that can prevent or suppress the occurrence of resonance. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing the appearance of an electronic musical instrument according to an embodiment of the present invention. [Figure 2] This is an overall perspective view showing the main parts of the speaker device according to the first embodiment. [Figure 3] This is an enlarged front view of the area near the speaker in the first embodiment. [Figure 4]This is a perspective view of the first cover, as seen from the front, in a speaker device according to the first embodiment, with the grille net, second cover, and cushioning material removed. [Figure 5] Figure 3 is a cross-sectional view of the IV-IV section, which is a transverse cross-section of the speaker. [Figure 6] This figure shows the bonding configuration between each support member and the Saran net in the first embodiment, where (a) is a front view and (b) is a rear view. [Figure 7] This is an enlarged front view of the speaker in the first embodiment, showing the arrangement of the cushioning member in the opening region. [Figure 8] This is an enlarged front view of the speaker in the second embodiment, showing the arrangement of the cushioning member in the opening region. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described below with reference to the drawings. The electronic keyboard instrument 100 (electronic instrument), which is an acoustic device shown in Figure 1, comprises a keyboard 130 with 61 keys and an instrument case 119. An operating section 131 with adjustment knobs 113 is provided on the top surface 111 of the electronic keyboard instrument 100. Furthermore, as shown in Figure 2, the back of the instrument case 119 is formed as a sound-emitting device equipped with multiple speakers 10.

[0012] Next, regarding the embodiment of this sound-emitting device, a first embodiment of the sound-emitting device according to the present invention will be described below with reference to Figures 2 to 7. Figure 2 is an overall perspective view showing the main parts of the speaker device (sound-emitting device) 1 according to this embodiment. As shown in Figure 2, the speaker device 1 is equipped with four speakers (sound-emitting parts) 10 arranged with the sound-emitting side facing approximately the front side (the front side shown in Figure 2). In the following description, the upper side in Figures 2 and 3 will be referred to as the upper side of the speaker device 1, and the opposite side as the lower side; the right side in Figures 2 and 3 will be referred to as the right side of the speaker device 1, and the opposite side as the left side; and the front side in Figures 2 and 3 (the sound-emitting side of each speaker 10) will be referred to as the front side (front view) and the opposite side as the rear side (back view).

[0013] The speaker device 1 comprises a first cover (first member) 50 on its front side, a second cover (second member) 60 positioned in front of the first cover 50, and a speaker grille 70 covering the front sides of the four speakers 10, the first cover 50, and the second cover 60 (see Figures 2 and 5). The speaker device 1 has a horizontally elongated rectangular parallelepiped shape, and the part other than the front side is constructed as a housing made of an instrument case 119 for an electronic keyboard instrument 100 (electronic instrument). Inside the housing are control circuit boards and the like (not shown) for controlling the speaker device 1. Note that in Figure 2, only a part of the housing (upper panel 20) that constitutes the exterior of the speaker device 1 is shown. The other parts of the housing of the speaker device 1 are constructed as an instrument case 119 made of general panel members that constitute the rear, left and right sides, and bottom of the speaker device 1.

[0014] The speaker unit 1 is equipped with a horizontally elongated rectangular upper panel 20, which is part of the enclosure. The four speakers 10 each have a horizontally elongated oval shape when viewed from the front, and are arranged in parallel in pairs on both the left and right sides of the speaker unit 1. On the front side of the speaker unit 1, a power switch 24 for turning the power on and off is provided on the upper right side of the two speakers on the left, and a power switch 24 for turning the power on and off is provided on the upper left side of the two speakers on the right. In addition, a terminal panel 30 for inserting various terminals is provided on the lower, approximately center side of the front side of the speaker unit 1.

[0015] The four speakers 10 provided in the speaker device 1 have the same configuration. As shown in FIG. 5, each speaker 10 is a general cone-type speaker, and is provided in the front portion of the speaker device 1 with the sound emission port 10a facing the front side. Each speaker 10 has a magnet portion 12 arranged on the rear side, a coil portion 14 arranged at the inner central portion of the magnet portion 12, a cap portion 16 arranged on the front side of the central portion, a diaphragm 18 having a substantially frustum shape that expands in diameter toward the front side, and a frame portion 19 that supports the outside of the diaphragm 18 and the like. The outer peripheral edge portion of the diaphragm 18 is an edge portion 18a. The sound emission center C of each speaker 10 is located at the upper portion of the cap portion 16.

[0016] As shown in FIG. 4, the first cover 50 is a horizontally long rectangular plate-shaped member made of synthetic resin, and is arranged to cover the front sides of two adjacent speakers 10 on the right side portion and the left side portion of the speaker device 1. That is, the speaker device 1 includes two first covers 50. The first cover 50 has two mesh-like portions 52 provided so as to overlap the sound emission ports 10a of the two speakers 10 respectively, a frame-like portion 54 provided so as to surround the periphery of each mesh-like portion 52 in a frame shape, and a horizontally long plate-shaped portion 56 provided outside the frame-like portion 54.

[0017] The plate-shaped portion 56 is attached to the upper panel 20, the control circuit board inside the speaker device 1, etc. by screws or the like with both plate surfaces facing in the front-rear direction. The frame-like portion 54 protrudes forward in a stepped shape from the front surface of the plate-shaped portion 56, and is provided so as to surround the periphery of each mesh-like portion 52 in a frame shape forming a horizontally long substantially regular octagon.

[0018] Each mesh-like part 52 is provided so as to slightly protrude forward from the entire surface of the frame-like part 54, and its outer edge part 52a has a horizontally long substantially elliptical shape similar to the sound emission port 10a of each speaker 10. The first cover 50 is arranged such that the outer edge part 52a of the mesh-like part 52 surrounds the edge part 18a of the diaphragm 18 of the speaker 10. Each mesh-like part 52 is composed of an opening region 53 formed by a plurality of openings constituted by a first beam 52b stretched in a so-called honeycomb structure having a substantially regular hexagonal mesh shape from the outer edge part 52a and a second beam 52c stretched in the vertical and horizontal directions from the outer edge part 52a. As shown in FIG. 3 and the like, the opening region 53 includes an opening 53a provided at a position overlapping the sound emission center C of the speaker 10.

[0019] Here, as shown in FIGS. 3 and 7, a vertically long substantially rectangular thin cushion member (buffer member) 80 having a shape along the first beam 52b and the second beam 52c is arranged on the front surface (between the first cover 50 and a later-described saran net 70) at a substantially central portion of the opening region 53. That is, the cushion member 80 is arranged in a shape along the non-opening portion in the opening region 53, and further has a bent beam-like portion (beam-like portion) 80a that is bent in a substantially V shape along the non-opening portion of the sound emission center C of the speaker 10 at its central portion. Therefore, the cushion member 80 is arranged at a position overlapping the sound emission center C of the speaker 10. The cushion member 80 is formed of urethane foam, an elastomer, silicon, or the like, and its thickness is, for example, 1 mm. The cushion member 80 is attached to the first beam 52b and the second beam 52c with an adhesive or the like. Therefore, the cushion member 80 can increase the in-plane strength in a plan view by including the bent beam-like portion 80a, and can improve the workability when attaching the cushion member 80 to the first cover 50.

[0020] As shown in Figures 2 and 7, the second cover 60 is made of synthetic resin and is a horizontally elongated rectangular plate-shaped member with a flat front surface. It is positioned to cover the front of the speaker device 1, excluding the power switches 24, the terminal panel 30, and the sound outlets 10a of each speaker 10. The second cover 60 has sound outlet openings 60a facing the sound outlets 10a of each speaker 10, at positions that overlap with the sound outlets 10a of each speaker 10. In other words, the second cover 60 is positioned to overlap the first cover 50 on the side opposite to the speaker 10, surrounding the opening areas 53 of the first cover 50. Therefore, the sound emitted from each speaker 10 is not blocked by the second cover 60.

[0021] As shown in Figure 5, specifically, the second cover 60 is positioned so as to abut the front surfaces of the plate-shaped portion 56 and the frame-shaped portion 54 of the first cover 50, and its sound-emitting opening 60a is positioned close to the outer edge 52a of the mesh-like portion 52 of the first cover 50. When the second cover 60 is positioned on the front side of the first cover, the front surface of the second cover 60 is located in front of (above in Figure 5) the mesh-like portion 52 of the first cover 50.

[0022] The speaker grille net 70 is made of a synthetic fiber such as polyester and is a material that has low sound transmission loss from each speaker 10 (a material with excellent sound transmission properties), and as a whole it has a horizontally elongated rectangular shape that is slightly larger than the second cover 60. As shown in Figure 5, the speaker grille net 70 is provided by being bonded to the flat front surface, the side surface, and a part of the rear surface of the second cover 60, respectively, thereby covering the front and side surfaces of the second cover 60 and the mesh portion 52 of the first cover 50 (the sound outlet 10a of the speaker 10). There is a gap between the speaker grille net 70 and the mesh portion 52 of the first cover 50 (the area where the speaker grille net 70 and the first cover 50 overlap), and the gap D1 is, for example, 2 mm. On the other hand, there is a close gap between the speaker grille net 70 and the cushion member 80, and the gap is, for example, 1 mm. As described above, the speaker grille 70 is supported on the sound outlet 10a side of the speaker 10 by two components, the first cover 50 and the second cover 60.

[0023] Next, with reference to Figure 6, the adhesion method of the Saran Net 70 to the second cover 60 will be described in detail. The area A1 of the front surface of the second cover 60, excluding the area around the sound vent opening 60a (the part that overlaps with the opening area 53 of the first cover 50), and the Saran Net 70 are bonded together with a first adhesive B1. The first adhesive B1 is, for example, a low-viscosity styrene-butadiene rubber (SBR) solvent-type adhesive. On the other hand, the area A2 of the front surface of the second cover 60, around the sound vent opening 60a (the part that overlaps with the opening area 53 of the first cover 50), and the Saran Net 70 are bonded together with a second adhesive B2, which has higher adhesive strength than the first adhesive B1. The second adhesive B2 is, for example, a high-viscosity chloroprene rubber solvent-type adhesive. Here, "high adhesive strength" means that it is difficult to peel off once it has solidified after bonding. Furthermore, the first adhesive B1 and the second adhesive B2 include both the state before the adhesive hardens and the state after it has hardened.

[0024] In this way, the area A2 around the sound vent opening 60a on the front surface of the second cover 60 and the Saran net 70 are bonded together with the second adhesive B2, which has excellent adhesive strength. As a result, the part of the Saran net 70 that overlaps with the sound vent opening 60a, i.e., the area A3 surrounded by the part bonded with the second adhesive B2, is under tension. The state in which the Saran net 70 is under tension here means that there are almost no wrinkles or sagging on the Saran net 70 and that it has a large elasticity (elastic recovery force) when pressed.

[0025] Next, the manufacturing method of the speaker device 1 according to this embodiment will be described. Note that the assembly process of the upper panel 20 and the process of assembling the control circuit board etc. into the speaker device 1 can be described using known speaker device manufacturing methods, so the description will be omitted. In this manufacturing method, first, the first cover 50 is assembled in front of each speaker 10 by overlapping the opening region 53 of the first cover 50 with the sound outlet 10a of the speaker 10 (first placement step). Next, the second cover 60 is placed in front of the first cover 50 so as to surround the opening region 53 of the first cover 50 (second placement step). That is, the second cover 60 is assembled by overlapping the sound outlet opening 60a of the second cover 60 with the opening region 53 of the first cover 50.

[0026] Next, the first adhesive B1 is applied to areas A1 and A2 (see Figure 6) by spraying or the like. Next, the second adhesive B2, which has higher adhesive strength than the first adhesive B1, is applied to area A2 (see Figure 6) around the sound vent opening 60a on the front surface of the second cover 60 by brushing or the like. Next, the Saran net 70 is bonded to area A1 where the first adhesive B1 is applied and to area A2 where the first adhesive B1 and the second adhesive B2 are applied, covering the front sides of the first cover 50 and the second cover 60 with the Saran net 70 (bonding process).

[0027] At this time, tension is applied to the portion of the speaker grille 70 that overlaps with the sound-emitting opening 60a, i.e., the region A3 (see Figure 6) surrounded by the portion to be bonded with the second adhesive B2, while the speaker grille 70 is bonded to the second cover 60. Tension to the speaker grille 70 can be applied, for example, by pulling the speaker grille 70 with even force from around the region A2 to which the second adhesive B2 has been applied. If only the second adhesive B2, which has high adhesive strength, is used, the workability of the process of bonding the Saran Net 70 will be poor. The bonding process for Saran Net 70 is not a process of applying tension to the entire surface and bonding it all at once; currently, tension is applied manually to parts of the net and bonded little by little. If the Saran Net 70 and the adhesive come into contact with areas other than those to be bonded, the second adhesive B2, which has high adhesive strength, will bond too strongly in an undesirable way. On the other hand, if only the first adhesive B1, which has low adhesive strength, is used, the Saran Net 70 requires a large amount of tension to prevent resonance, and the first adhesive B1, which has low adhesive strength, cannot provide sufficient tension. Therefore, by using two adhesives, it is possible to apply a large amount of tension to the Saran Net 70 while ensuring the workability of the bonding process.

[0028] As described above, according to the speaker device 1 of this embodiment, a first cover 50 is provided such that its opening region 53 overlaps the sound outlet 10a of the speaker 10, and a second cover 60 is provided on the side of the first cover 50 opposite to the speaker 10 (front side) such that the sound outlet opening 60a overlaps the opening region 53, and a speaker grille net 70 is provided covering the side of the first cover 50 and the second cover 60 opposite to the speaker 10 (front side) and is adhered to the second cover 60. As a result, the speaker grille net 70 is supported on the sound outlet 10a side of the speaker 10 by the two members, the first cover 50 and the second cover 60. With this configuration, at the position where it overlaps with the sound outlet 10a of the speaker 10, a sufficient gap is secured between the sound outlet 10a of the speaker 10, the opening region 53 of the first cover 50, and the speaker grille net 70.

[0029] Furthermore, in the speaker device 1 according to this embodiment, the second cover 60 and the grille net 70 are bonded together in region A1 with the first adhesive B1, and in region A2 on the front surface of the second cover 60 around the sound outlet opening 60a, the second cover 60 and the grille net 70 are bonded together with the second adhesive B2, which has a higher adhesive strength than the first adhesive B1. With this configuration, region A3, surrounded by the parts bonded with the second adhesive B2, is subjected to a greater tension than region A1, which is bonded with the first adhesive B1. As described above, in the speaker device 1 according to this embodiment, a large tension can be applied to the grille net 70 while ensuring a gap between the sound outlet 10a of the speaker 10 and the grille net 70, thereby preventing or suppressing the occurrence of resonance.

[0030] Furthermore, in speaker device 1, the speaker grille 70 is bonded to the second cover 60 with tension applied to region A3, which is surrounded by at least the portion bonded by the second adhesive B2. This allows for greater tension to be applied to the speaker grille 70 in region A3, thereby more effectively preventing or suppressing resonance in speaker device 1.

[0031] Furthermore, in the speaker device 1, there is a gap between the area of ​​the speaker grille 70 that overlaps with the opening area 53 of the first cover 50. This provides a specific configuration that ensures sufficient space between the opening area 53 of the first cover 50 and the speaker grille 70.

[0032] Furthermore, in the speaker device 1, the opening region 53 of the first member includes an opening 53a located at a position that coincides with the sound emission center C of the speaker 10. As a result, the sound emitted from the sound emission center C, where the sound is strongest, passes through this opening 53a, thus preventing the sound emitted from the speaker 10 from being impaired by the first cover 50.

[0033] Furthermore, the speaker device 1 includes a cushioning member 80 positioned between the first cover 50 and the speaker grille 70 and adhered to the first cover 50. Therefore, the vibration of the first cover 50 caused by the sound emitted from the speaker 10 can be suppressed by the cushioning member 80, and the occurrence of resonance can be effectively prevented or suppressed.

[0034] Furthermore, in the speaker device 1, the cushioning member 80 is bonded to the first cover 50 along the non-opening area 53 of the first cover 50. Therefore, the vibration of the first cover 50 caused by the sound emitted from the speaker 10 can be further suppressed by the cushioning member 80, and the occurrence of resonance can be more effectively prevented or suppressed.

[0035] Furthermore, in the speaker device 1, the opening region 53 of the first cover 50 is provided by the first beam 52b and the second beam 52c, and the cushion member 80 is bonded to the first cover 50 in a manner that is aligned with the first beam 52b and the second beam 52c of the first cover 50. This provides a specific configuration for positioning the cushion member 80 along the non-opening area of ​​the opening region 53.

[0036] Furthermore, in the speaker device 1, the cushion member 80 has a bent beam-like portion 80a provided along the non-opening at the sound emission center C of the speaker 10. As a result, the bent beam-like portion 80a in the cushion member 80 functions as a beam, which increases the in-plane strength of the cushion member 80 in a plan view, and also improves the workability when attaching the cushion member 80 to the first cover 50.

[0037] Furthermore, in speaker device 1, the cushioning member 80 and the speaker grille 70 are in close proximity. As a result, when the speaker grille 70 vibrates, the speaker grille 70 interferes with the cushioning member 80, and the vibration is absorbed by the cushioning member 80, thus more effectively preventing or suppressing the occurrence of resonance.

[0038] Furthermore, the electronic keyboard instrument 100, which is an electronic musical instrument equipped with this speaker device 1, can more effectively prevent or suppress the occurrence of resonance when emitting sound, thereby producing high-quality sound.

[0039] Furthermore, the manufacturing method of the speaker device 1 includes a first placement step of placing a first cover 50 having an opening region 53 consisting of multiple openings so that the opening region 53 overlaps the sound outlet 10a of the speaker 10; a second placement step of placing a second cover 60 so that it overlaps the first cover 50 on the side opposite to the speaker 10, surrounding the opening region 53 of the first cover 50; and an adhesion step of bonding a speaker net 70 to the second cover 60 so that it covers the side of the first cover 50 and the second cover opposite to the speaker 10. In the adhesion step, region A1 between the second cover 60 and the speaker net 70 is bonded with a first adhesive B1, and region A2 around the opening region 53 of the first cover 50 is bonded with a second adhesive B2 which has a higher adhesive strength than the first adhesive B1.

[0040] According to the above manufacturing method, the first and second placement steps allow the first cover, second cover, and speaker grille 70 to be assembled in a position overlapping with the speaker 10's sound outlet 10a, ensuring a sufficient gap between the speaker 10's sound outlet 10a, the opening region 53 of the first cover 50, and the speaker grille 70. Furthermore, the bonding step allows the speaker grille 70 to be bonded to the second cover 60 in a region A3 surrounded by the parts bonded with the second adhesive B2, under greater tension than in the region A1 bonded with the first adhesive B1. This makes it possible to manufacture a speaker device 1 in which a large tension is applied to the speaker grille 70 while ensuring a sufficient gap between the speaker 10's sound outlet 10a and the speaker grille 70, thereby preventing or suppressing the occurrence of resonance.

[0041] Furthermore, in the manufacturing method of the speaker device 1, the bonding step involves bonding the speaker grille 70 to the second cover 60 while tension is applied to the region A3 surrounded by at least the parts of the speaker grille 70 to be bonded with the second adhesive B2. This makes it possible to apply greater tension to the speaker grille 70 in region A3 during the bonding step, thereby enabling the manufacture of a speaker device 1 that can more effectively prevent or suppress the occurrence of resonance.

[0042] Next, a second embodiment of the speaker device (sound emission device) 1 will be described with reference to Figure 8. In the second embodiment, the shape of the cushion member 180 differs from that of the cushion member 80 in the first embodiment. The other configurations are the same as in the first embodiment, so their description will be omitted. As shown in Figure 8, in the cushion member 180 according to the second embodiment, the portion surrounding the opening 53a, which is located in the opening region 53 at a position overlapping with the sound emission center C of the speaker 10, is not shaped along the second beam 52c, but rather has a straight beam-like portion (beam-like portion) 180a that is aligned in the left-right direction. Even with this shape, the cushion member 180 according to the second embodiment can achieve the same effects as the cushion member 80 according to the first embodiment. Furthermore, by including the straight beam-like portion 180a, the cushion member 180 according to the second embodiment can increase the in-plane strength in a plan view, and improve the workability when attaching the cushion member 80 to the first cover 50.

[0043] The embodiments described above are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and gist of the invention, as well as in the claims of the invention and its equivalents. For example, in each of the above embodiments, a configuration in which a cushioning member is placed on the opening region was illustrated, but the speaker device may also be configured without a cushioning member. Even with such a configuration, the speaker device can apply a large tension to the speaker grille while ensuring a gap between the speaker's sound outlet and the grille, thereby preventing or suppressing the occurrence of resonance and resulting in an electronic musical instrument that emits high-quality sound. [Explanation of symbols]

[0044] 1 speaker unit 10 speakers 10a Sound outlet 12 Magnet section 14 Coil section 16 Cap section 18 Diaphragm 18a Edge 19 Frame section 20 Upper panel 24 Power switch 30 Terminal panel 50 First cover 52 Mesh section 52a Outer edge 52b First beam 52c Second beam 53 Opening area 53a Opening 54 Frame-shaped part 56 Plate-shaped part 60 Second cover 60a Sound outlet opening 70 Saran net 80 Cushioning material 100 Electronic keyboard instrument 111 Top view 113 Adjustment knob 119 Instrument case 130 Keyboard 131 Control section 80a Bent beam section 180 Cushion member 180a Straight beam A1,A2,A3 area B1 First adhesive B2 Second adhesive C Sound emission center D1 Interval

Claims

1. At least one sound-emitting part, A first member having an opening region, the first member being provided such that the sound outlet of the sound emitting section and the opening region overlap, A second member is provided so as to overlap the first member on the side opposite to the sound-emitting part, and has an opening at a position corresponding to the sound-emitting port, The system comprises a covering member that covers the opposite side of the first member and the second member, The first member has a first opening corresponding to the opening region and a frame-shaped portion provided so as to surround the first opening, and does not come into contact with the covering member in the opening region. The first opening is provided extending outwards from the frame-like portion on the opposite side. Between the second member and the covering member, a second adhesive is provided in the region of the second member along the periphery of the opening region of the first member. A sound emission device characterized by the following features.

2. The covering member covers the second member by being adhered to the sound-emitting side of the second member, the opposite side, and the side surface connected to the sound-emitting side and the opposite side, respectively. The sound emission device according to feature 1.

3. The frame-shaped portion comprises a plate-shaped portion provided on the outside of the frame-shaped portion, The frame-like portion extends in a stepped manner from the front surface of the plate-like portion to the opposite side, and is provided to surround the first opening in a frame-like manner. The sound emission device according to feature 1.

4. The device comprises a buffer member positioned between the first member and the covering member and bonded to the first member, The sound emission device according to claim 1 or 2.

5. The buffer member is bonded to the first member in a manner that is aligned with the non-opening area of ​​the opening region of the first member. The sound emission device according to feature 4.

6. The cushioning member does not come into contact with the covering member. The sound emission device according to feature 4.

7. Between the second member and the covering member, the area of ​​the second member excluding the area along the periphery of the opening region of the first member is bonded with the first adhesive, and the area of ​​the second member along the periphery of the opening region of the first member is bonded with the second adhesive, which has a higher adhesive strength than the first adhesive. The sound emission device according to feature 1.

8. An electronic musical instrument comprising the sound emission device described in claim 1.

Images