Sound emission apparatus and electronic musical instrument and manufacturing method of sound emission apparatus

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 a sound emitting device. [Background technology]

[0002] Conventionally, covering members such as saran nets have been proposed that are 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 to cover the sound-emitting port. For example, Patent Document 1 discloses a sound-emitting structure in which an acoustically transparent covering member is fixed to a sound-emitting body. In this sound-emitting structure, a groove portion is provided in the sound-emitting body for pressing a fixing member into the sound-emitting body, and in a state in which the sound-emitting body is 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 pressed into the groove portion, thereby firmly fixing the covering member to the sound-emitting body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-68146 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a configuration in which the sound output side of a sound output device such as an electronic musical instrument is covered with a covering member, resonance occurring between the sound output port and the covering member is a problem. The occurrence of such resonance is caused by the sound output port and the covering member being in close proximity or in contact with each other, or by the covering member provided at a position overlapping with the sound output port being in a state where it is prone to vibrating because tension is not applied to the covering member. In the sound output structure of Patent Document 1, although tension is applied to the covering member by being firmly fixed, there is not enough space between the sound output 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 manufacturing method for 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 emission port of a sound emitting section 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] A sound emitting device according to one embodiment of the present invention comprises a sound emitting section, a first member arranged to overlap at least a sound emitting port of the sound emitting section and having an opening area consisting of a plurality of openings at a portion overlapping the sound emitting port, a second member arranged to surround the opening area of ​​the first member and overlap the side of the first member opposite the sound emitting section side, and a covering member covering the sides of the first member and the second member opposite the sound emitting section side and bonded to the second member, wherein the second member and the covering member are bonded together in such a manner that a first adhesive is used in the area of ​​the second member excluding the area around the opening area of ​​the first member, and a second adhesive having an adhesive strength higher than that of the first adhesive in the area of ​​the second member around the opening area of ​​the first member.

[0007] An electronic musical instrument according to one aspect of the present invention includes the above-mentioned sound emitting device.

[0008] Moreover, a manufacturing method of a sound output device according to one embodiment of the present invention includes a first arrangement step of arranging a first member having an opening area consisting of a plurality of openings, with the opening area overlapping a sound output port of a sound output section; a second arrangement step of arranging a second member so as to surround the opening area of ​​the first member, with the first member overlapping the side opposite the sound output section side of the first member; and a bonding step of adhering a covering member to the second member so as to cover the sides of the first member and the second member opposite the sound output section side, in which the bonding step bonds a region of the second member between the second member and the covering member except for a region around the opening area of ​​the first member with a first adhesive, and bonds a region of the second member around the opening area of ​​the first member with a second adhesive having an adhesive strength higher than that of the first adhesive. Effect of the Invention

[0009] According to the present invention, it is possible to provide a sound output device and a manufacturing method for a sound output device that can prevent or suppress the occurrence of resonance by applying tension to the covering member while maintaining a gap between the sound output port of the sound output section and the covering member, and an electronic musical instrument equipped with a sound output device that can prevent or suppress the occurrence of resonance. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing the appearance of an electronic musical instrument according to an embodiment of the present invention; [Diagram 2] 1 is an overall perspective view showing a main part of a speaker device according to a first embodiment. [Diagram 3] FIG. 2 is an enlarged front view of the vicinity of the speaker in the first embodiment. [Figure 4] 1 is a perspective view of a first cover from a front side in a state in which a saran net, a second cover, and a cushioning material have been removed in the speaker device according to the first embodiment. FIG. [Diagram 5] 4 is a cross-sectional view of the speaker taken along line IV-IV in FIG. 3. FIG. [Figure 6] FIG. 2 is a diagram showing an adhesive state between each support member and a saran net in the first embodiment, (a) being a front view and (b) being a rear view. [Figure 7] FIG. 2 is an enlarged front view of the speaker in the first embodiment, showing the arrangement of a cushion member in the opening region. [Figure 8] FIG. 11 is an enlarged front view of the speaker in the second embodiment, showing the arrangement of the cushion member in the opening region. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. An electronic keyboard instrument 100 (electronic instrument) which is an acoustic device shown in Fig. 1 includes a 61-key keyboard 130 and an instrument case 119. An operation unit 131 including an adjustment knob 113 is provided on a top surface 111 of the electronic keyboard instrument 100. Also, as shown in Fig. 2, the rear surface of the instrument case 119 is formed as a sound emitting device including a plurality of speakers 10.

[0012] The first embodiment of the sound emitting device according to the present invention will be described below with reference to Figs. 2 to 7. Fig. 2 is an overall perspective view showing a main part of a speaker device (sound emitting device) 1 according to this embodiment. As shown in Fig. 2, the speaker device 1 includes four speakers (sound emitting parts) 10 arranged with their sound emitting sides facing substantially the front side (the near side shown in Fig. 2). In the following description, the upper side in Figs. 2 and 3 is the upper side of the speaker device 1, the opposite side is the lower side, the right side in Figs. 2 and 3 is the right side of the speaker device 1, the opposite side is the left side, and the near side in Figs. 2 and 3 (the sound emitting side of each speaker 10) is the front side (front side), and the opposite side is the rear side (rear side).

[0013] The speaker device 1 includes a first cover (first member) 50 on the front side, a second cover (second member) 60 disposed in front of the first cover 50, and a saran net 70 covering the four speakers 10, the first cover 50, and the front side of the second cover 60 (see Figs. 2 and 5). The speaker device 1 has an appearance of a horizontally elongated rectangular parallelepiped, and the portion other than the front side is configured as a housing made of an instrument case 119 of an electronic keyboard instrument 100 (electronic instrument). Inside the housing, a control circuit board (not shown) for controlling the speaker device 1 and the like are disposed. Note that Fig. 2 shows only a part of the housing (upper panel 20) that constitutes the exterior of the speaker device 1. The other portions of the housing of the speaker device 1 are configured as an instrument case 119 such as a general panel member that constitutes the rear side, both left and right side sides, and the bottom side of the speaker device 1.

[0014] An upper panel 20 in the shape of a horizontally long rectangular plate, which is a part of the housing, is provided on the upper side of the speaker device 1. The four speakers 10 have sound outlets 10a each having a horizontally long elliptical shape when viewed from the front side, and are arranged in parallel, two on each side of the left and right sides of the speaker device 1. On the front side of the speaker device 1, a power switch 24 for turning on and off the power of these two speakers 10 is provided on the upper right side of the two speakers arranged on the left side, and a power switch 24 for turning on and off the power of these two speakers 10 is provided on the upper left side of the two speakers 10 arranged on the right side. In addition, a terminal panel 30 for inserting various terminals is provided on the lower side of the approximately center part on the front side of the speaker device 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 typical cone-shaped speaker, and is provided in the front part of the speaker device 1 with the sound output port 10a facing forward. Each speaker 10 has a magnet part 12 arranged on the rear side, a coil part 14 arranged in the inner center part of the magnet part 12, a cap part 16 arranged in front of the center part, a diaphragm 18 having a substantially truncated cone shape whose diameter expands toward the front side, and a frame part 19 supporting the outside of the diaphragm 18. The outer peripheral edge part of the diaphragm 18 is an edge part 18a. The sound output center C of each speaker 10 is located above the cap part 16.

[0016] 4, the first cover 50 is a horizontally long rectangular plate-like member made of synthetic resin, and is disposed in a manner covering the front sides of two adjacent speakers 10 on the right and left sides 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 outlets 10a of the two speakers 10, respectively, a frame-like portion 54 provided so as to surround each of the mesh-like portions 52 in a frame shape, and a horizontally long plate-like portion 56 provided outside the frame-like portion 54.

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

[0018] Each mesh part 52 is provided to protrude slightly forward from the entire surface of the frame part 54, and its outer edge part 52a has a horizontally elongated, approximately elliptical shape similar to the sound emission port 10a of each speaker 10. The first cover 50 is arranged so that the outer edge part 52a of the mesh part 52 surrounds the edge part 18a of the diaphragm 18 of the speaker 10. Each mesh part 52 has an opening region 53 consisting of a plurality of openings constituted by first beams 52b stretched from the outer edge part 52a in a so-called honeycomb structure forming a substantially regular hexagonal mesh shape, and second beams 52c stretched vertically and horizontally 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 with the sound emission center C of the speaker 10.

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

[0020] 2 and 7, the second cover 60 is made of synthetic resin, is a horizontally long rectangular plate-like member with a flat front surface, and is arranged to cover the front of the speaker device 1 except for the power switches 24, the terminal panel 30, and the sound outlets 10a of the speakers 10. The second cover 60 has sound outlet openings 60a that face the sound outlets at positions that overlap with the sound outlets 10a of the speakers 10. In other words, the second cover 60 is provided so as to surround the opening areas 53 of the first cover 50, overlapping the side opposite to the speaker 10 side of the first cover 50. Therefore, the sound emitted from each speaker 10 is not blocked by the second cover 60.

[0021] 5, specifically, the second cover 60 abuts against the front surfaces of the plate-like portion 56 and the frame-like portion 54 of the first cover 50, and is disposed so that its sound emission opening 60a is adjacent to the outer edge portion 52a of the mesh portion 52 of the first cover 50. When the second cover 60 is disposed on the front side of the first cover, the front surface of the second cover 60 is located forward of the mesh portion 52 of the first cover 50 (upper side in FIG. 5).

[0022] The saran net 70 is made of chemical fibers such as polyester, and is a member with little transmission loss of the sound emitted from each speaker 10 (a member with excellent sound transmission), and has an elongated rectangular shape that is slightly larger than the second cover 60 as a whole. As shown in FIG. 5, the saran net 70 is provided by bonding to the front surface of the second cover 60, which is a flat surface, the side surface of the second cover 60, and a part of the rear surface of the second cover 60, thereby covering the front surface and side surface of the second cover 60 and the mesh-like portion 52 of the first cover 50 (the sound emission port 10a of the speaker 10). The saran net 70 and the mesh-like portion 52 of the first cover 50 (the area where the saran net 70 and the first cover 50 overlap) are spaced apart from each other, and the distance D1 is, for example, 2 mm. The saran net 70 and the cushion member 80 are close to each other, and the distance is, for example, 1 mm. As described above, the saran net 70 is supported on the sound output port 10a side of the speaker 10 by the two members, the first cover 50 and the second cover 60.

[0023] Next, referring to FIG. 6, the bonding mode 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 periphery of the sound outlet opening 60a (the portion overlapping with the opening region 53 of the first cover 50), and the saran net 70 are bonded with a first adhesive B1. The first adhesive B1 is, for example, a styrene butadiene rubber (SBR)-based solvent-based adhesive with low viscosity. On the other hand, the area A2 of the front surface of the second cover 60 around the sound outlet opening 60a (the portion overlapping with the opening region 53 of the first cover 50) and the saran net 70 are bonded with a second adhesive B2 having a higher adhesive strength than the first adhesive B1. The second adhesive B2 is, for example, a chloroprene rubber-based solvent-based adhesive with high viscosity. Here, high adhesive strength means that the adhesive is difficult to peel off when solidified after bonding. Further, the first adhesive B1 and the second adhesive B2 include a state before the adhesive solidifies and a state after adhesion and solidifies.

[0024] In this way, the area A2 around the sound outlet opening 60a on the front surface of the second cover 60 and the saran net 70 are bonded with the second adhesive B2, which has excellent adhesive strength, so that the area of ​​the saran net 70 that overlaps with the sound outlet opening 60a, i.e., the area A3 surrounded by the area bonded with the second adhesive B2, is in a state of tension. The state in which the saran net 70 is in tension here refers to a state in which the saran net 70 has almost no wrinkles or slack and has a large elastic force (elastic return force) when pressed.

[0025] Next, a method for manufacturing the speaker device 1 according to this embodiment will be described. The process for assembling the upper panel 20 and the process for assembling the control circuit board and the like in the speaker device 1 can be performed using a known method for manufacturing a speaker device, and therefore the description will be omitted. In this manufacturing method, first, the first cover 50 is disposed and assembled on the front side of each speaker 10 so that the opening area 53 of the first cover 50 overlaps the sound output port 10a of the speaker 10 (first arrangement process). Next, the second cover 60 is disposed and assembled on the front side of the first cover 50 so as to surround the opening area 53 of the first cover 50 (second arrangement process). That is, the second cover 60 is disposed and assembled so that the sound output port opening 60a of the second cover 60 overlaps the opening area 53 of the first cover 50.

[0026] Next, the first adhesive B1 is applied to the areas A1 and A2 (see FIG. 6) by spraying or the like. Next, the second adhesive B2, which has a stronger adhesive strength than the first adhesive B1, is applied to the area A2 (see FIG. 6) around the sound outlet opening 60a on the front surface of the second cover 60 by brush or the like. Next, the saran net 70 is adhered to the area A1 to which the first adhesive B1 is applied and the area A2 to which the first adhesive B1 and the second adhesive B2 are applied, and the front sides of the first cover 50 and the second cover 60 are covered with the saran net 70 (adhering process).

[0027] At this time, the saran net 70 is attached to the second cover 60 while tension is being applied to the portion of the saran net 70 that overlaps with the sound emission opening 60a, i.e., the area A3 (see FIG. 6) surrounded by the area bonded with the second adhesive B2. The tension can be applied to the saran net 70, for example, by applying a uniform force to pull the saran net 70 from around the area A2 where the second adhesive B2 is applied. Here, if only the second adhesive B2 with high adhesive strength is used, the workability of the process of adhering the saran net 70 becomes poor. The process of adhering the saran net 70 is not a process of applying tension to the entire surface and adhering it all at once, but rather, it is currently a process of manually applying tension to parts and adhering it little by little. If the adhesive comes into contact with the saran net 70 at a place other than the part to be adhered, the second adhesive B2 with high adhesive strength will undesirably adhere it strongly. On the other hand, if only the first adhesive B1 with low adhesive strength is used, the saran net 70 needs a large tension to prevent the occurrence of resonance, and the first adhesive B1 with low adhesive strength cannot ensure a large tension. Therefore, by using two adhesives, it is possible to apply a large tension to the saran net 70 while ensuring the workability of the process of adhering the saran net 70.

[0028] As described above, according to the speaker device 1 of this embodiment, the first cover 50 is provided with the opening area 53 overlapping the sound output port 10a of the speaker 10, the second cover 60 is provided on the opposite side (front side) of the first cover 50 from the speaker 10 side with the sound output port opening 60a overlapping the opening area 53, and the saran net 70 is provided to cover the opposite side (front side) of the first cover 50 and the second cover 60 from the speaker 10 side and to be bonded to the second cover 60. As a result, the saran net 70 is supported on the sound output port 10a side of the speaker 10 by the two members of the first cover 50 and the second cover 60. With this configuration, a sufficient gap is secured between the sound output port 10a of the speaker 10 and the opening area 53 of the first cover 50 and the saran net 70 at the position where the saran net 70 overlaps the sound output port 10a of the speaker 10.

[0029] Furthermore, in the speaker device 1 according to the present embodiment, the second cover 60 and the saran net 70 are bonded in the region A1 by the first adhesive B1, and in the region A2 around the sound outlet opening 60a on the front surface of the second cover 60, the second cover 60 and the saran net 70 are bonded by the second adhesive B2 having a higher adhesive strength than the first adhesive B1. With this configuration, the region A3 surrounded by the parts bonded by the second adhesive B2 is in a state in which a larger tension is applied than the region A1 bonded by the first adhesive B1. As described above, in the speaker device 1 according to the present embodiment, a large tension can be applied to the saran net 70 while securing the interval between the sound outlet 10a of the speaker 10 and the saran net 70, and the occurrence of resonance can be prevented or suppressed.

[0030] In the speaker device 1, the saran net 70 is attached to the second cover 60 with tension applied to at least the area A3 surrounded by the portion attached with the second adhesive B2. This allows a larger tension to be applied to the saran net 70 in the area A3, and the occurrence of resonance in the speaker device 1 can be more effectively prevented or suppressed.

[0031] In the speaker device 1, the saran net 70 is spaced apart from the area that overlaps with the opening area 53 of the first cover 50. This provides a specific configuration for ensuring a sufficient gap between the opening area 53 of the first cover 50 and the saran net 70.

[0032] Moreover, in the speaker device 1, the opening area 53 of the first member includes an opening 53a provided at a position overlapping with the sound emission center C of the speaker 10. As a result, the sound emitted from the sound emission center C, which is the loudest sound, passes through this opening 53a, so that the sound emitted from the speaker 10 can be prevented from being impaired by the first cover 50.

[0033] Moreover, the speaker device 1 includes a cushion member 80 disposed between the first cover 50 and the saran net 70 and bonded to the first cover 50. Therefore, the cushion member 80 can suppress vibration of the first cover 50 caused by sound emitted from the speaker 10, and the occurrence of resonance can be effectively prevented or suppressed.

[0034] Moreover, in the speaker device 1, the cushion member 80 is adhered to the first cover 50 in a shape that follows the non-opening portion in the opening region 53 of the first cover 50. Therefore, the cushion member 80 can further suppress the vibration of the first cover 50 caused by the sound emitted from the speaker 10, and the occurrence of resonance can be more effectively prevented or suppressed.

[0035] Moreover, 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 shape that is aligned with the first beam 52b and the second beam 52c of the first cover 50. This makes it possible to provide a specific configuration for arranging the cushion member 80 in a shape that is aligned with the non-opening portion in the opening region 53.

[0036] Moreover, in the speaker device 1, the cushion member 80 has a curved beam portion 80a provided along the non-opening portion at the sound emission center C of the speaker 10. As a result, the curved beam portion 80a functions as a beam in the cushion member 80, so that the in-plane strength of the cushion member 80 in a plan view can be increased, and further, the workability when attaching the cushion member 80 to the first cover 50 can be improved.

[0037] Moreover, in the speaker device 1, the cushion member 80 and the saran net 70 are close to each other. As a result, when the saran net 70 vibrates, the saran net 70 interferes with the cushion member 80, and the vibration is absorbed by the cushion member 80, so that the occurrence of resonance can be more effectively prevented or suppressed.

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

[0039] The manufacturing method of the speaker device 1 includes a first arrangement step of arranging a first cover 50 having an opening area 53 consisting of a plurality of openings, with the opening area 53 overlapping the sound outlet 10a of the speaker 10; a second arrangement step of arranging a second cover 60 so as to surround the opening area 53 of the first cover 50, with the second cover 60 overlapping the side of the first cover 50 opposite the speaker 10 side; and a bonding step of adhering the saran net 70 to the second cover 60 so as to cover the side of the first cover 50 and the second cover opposite the speaker 10 side, in which the bonding step bonds an area A1 between the second cover 60 and the saran net 70 with a first adhesive B1, and bonds an area A2 around the opening area 53 of the first cover 50 with a second adhesive B2 having a higher adhesive strength than the first adhesive B1.

[0040] According to the above manufacturing method, the first and second arranging steps allow the first and second covers to be assembled in a state where a sufficient gap is secured between the sound outlet 10a of the speaker 10 and the opening area 53 of the first cover 50 and the saran net 70 at the position where the sound outlet 10a of the speaker 10 overlaps with the sound outlet 10a of the speaker 10. Furthermore, the bonding step allows the saran net 70 to be bonded to the second cover 60 in a state where a larger tension is applied to the area A3 surrounded by the parts bonded with the second adhesive B2 than to the area A1 bonded with the first adhesive B1. This allows the speaker device 1 to be manufactured in which a large tension is applied to the saran net 70 while securing a gap between the sound outlet 10a of the speaker 10 and the saran net 70, and in which the occurrence of resonance can be prevented or suppressed.

[0041] Moreover, in the manufacturing method of the speaker device 1, the bonding step bonds the saran net 70 to the second cover 60 while applying tension to an area A3 of the saran net 70 that is surrounded by at least the portion of the saran net 70 bonded by the second adhesive B2. This allows a larger tension to be applied to the saran net 70 in the area A3 in the bonding step, and makes it possible to manufacture 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 FIG. 8. In the second embodiment, the shape of the cushion member 180 is different from that of the cushion member 80 of the first embodiment. Other configurations are the same as those of the first embodiment, and therefore description thereof will be omitted. As shown in FIG. 8, the cushion member 180 according to the second embodiment has a portion surrounding the opening 53a provided at a position overlapping the sound emission center C of the speaker 10 in the opening region 53, which is not shaped along the second beam 52c, but is a straight beam-like portion (beam-like portion) 180a that is straight along the left-right direction. Even with such a shape, the cushion member 180 according to the second embodiment can achieve the same effect as the cushion member 80 according to the first embodiment. Furthermore, the cushion member 180 according to the second embodiment can increase the in-plane strength in a plan view by including the above-mentioned straight beam-like portion 180a, and can improve the workability when attaching the cushion member 80 to the first cover 50.

[0043] The above-described embodiments are presented as examples, 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 modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. For example, in each of the above embodiments, a configuration in which a cushion member is arranged on the opening area is exemplified, but the speaker device may be configured without a cushion member. Even with such a configuration, the speaker device can apply a large tension to the saran net while ensuring the distance between the sound output port of the speaker and the saran net, and can prevent or suppress the occurrence of resonance, making it an electronic musical instrument that emits high-quality sound. [Explanation of symbols]

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

Claims

1. At least one sound emitting section; A first member having an opening area provided so as to overlap the sound output port of the sound output portion; a second member provided on the first member so as to overlap the side opposite to the sound output portion and having an opening at a position corresponding to the sound output port; a covering member covering the opposite sides of the first member and the second member; Equipped with The first member does not contact the covering member in the opening region. A sound emitting device characterized by the above.

2. the covering member covers the second member by being adhered to the sound emitting portion side, the opposite side, and a side surface connected to the sound emitting portion side and the opposite side of the second member, 2. The sound emitting device according to claim 1 .

3. The first member is a first opening corresponding to the opening region; A frame-shaped portion provided so as to surround the first opening; and a plate-shaped portion provided on the outer side of the frame-shaped portion; Equipped with 2. The sound emitting device according to claim 1 .

4. The frame-shaped portion protrudes forward from the front surface of the plate-shaped portion in a stepped manner and is provided so as to surround the first opening in a frame-like manner, The first opening is provided protruding forward from the frame portion.

4. The sound emitting device according to claim 3.

5. a buffer member disposed between the first member and the covering member and bonded to the first member; 3. The sound emitting device according to claim 1 or 2.

6. The cushioning member is bonded to the first member in a shape that follows the non-opening portion in the opening region of the first member.

6. The sound emitting device according to claim 5.

7. The buffer member does not contact the covering member.

6. The sound emitting device according to claim 5.

8. The second member and the covering member are bonded together by a first adhesive in an area of ​​the second member excluding the area around the opening region of the first member, and by a second adhesive having an adhesive strength higher than that of the first adhesive in an area of ​​the second member around the opening region of the first member.

3. The sound emitting device according to claim 2.

9. An electronic musical instrument comprising a sound emitting device according to any one of claims 1 to 8.

Images