JP7467838B2 - Electronic Instruments - Google Patents

Description

The present invention relates to an electronic musical instrument.

Electronic musical instruments with built-in speakers in a housing made up of multiple cases have been proposed. For example, Patent Document 1 discloses the exterior structure of an electronic musical instrument (electronic keyboard instrument) that has a lower case with a bottom plate on which a keyboard section is mounted, and an upper case that covers the upper side of the lower case and has an operating section. The upper plate of the upper case is provided with a keyboard opening for exposing the keyboard section, and a speaker opening for exposing the speaker. The upper case and lower case are fixed together with screws.

JP 2008-170477 A

When combining multiple cases as in the electronic musical instrument of Patent Document 1, if the opposing end faces of the connecting parts are brought into contact with each other to produce sound from a speaker, the two cases may vibrate and collide, resulting in a buzzing sound. In addition, if the cases are reinforced with reinforcing members such as metal to give them rigidity, or if gaskets are placed between the connecting parts of the two cases to absorb vibrations, this increases costs and the number of assembly steps.

The objective of the present invention is to provide an electronic musical instrument that produces good sound.

An electronic musical instrument of one embodiment of the present invention comprises a first case, a second case, a speaker disposed inside the first case and the second case, and a fixing member fixing the first case and the second case to each other , and has a first rib on the inside of the edge of the first case abutting the inside of the edge of the second case, and the first case and the second case are fixed by the fixing member so that sound generated by the speaker is emitted to the outside from a sound emission section provided in at least one of the first case and the second case corresponding to the speaker, and a gap is provided between the first case and the second case so that the sound generated by the speaker is emitted to the outside from at least a portion of the outer periphery of the first case and the second case.

The present invention provides an electronic musical instrument that produces good sound.

1 is a perspective view of an electronic musical instrument according to an embodiment of the present invention, as viewed from the front side. 1 is a perspective view of an electronic musical instrument according to an embodiment of the present invention, as viewed from the rear side. FIG. 4 is a rear view of the upper case according to the embodiment of the present invention. FIG. 4 is a plan view of a lower case according to the embodiment of the present invention. 3A and 3B are partial perspective views of the inside of an upper case and a lower case according to an embodiment of the present invention, in which FIG. 6A and 6B are cross-sectional views taken along the line VI-VI of the electronic musical instrument shown in FIG. 1 according to an embodiment of the present invention, in which (a) shows an enlarged cross-sectional view of the rear wall side, and (b) shows an enlarged view of part C in FIG. 6A. 7A and 7B are cross-sectional views taken along the line VII-VII of the electronic musical instrument shown in FIG. 1 according to an embodiment of the present invention, in which (a) shows an enlarged cross-sectional view of the rear wall side, and (b) shows an enlarged view of part D in FIG. 8A and 8B are cross-sectional views taken along the line VIII-VIII of the electronic musical instrument shown in FIG. 1 according to the embodiment of the present invention, in which (a) shows an enlarged cross-sectional view of the right side wall side, and (b) shows an enlarged view of part E in FIG. 8A. 9 is a cross-sectional view of the electronic musical instrument shown in FIG. 1 taken along line IX-IX of the embodiment of the present invention. 2 is a cross-sectional view of the electronic musical instrument shown in FIG. 1 along the line XX according to the embodiment of the present 1 according to an embodiment of the present invention. FIG.

The following describes an embodiment of the present invention. Fig. 1 is a perspective view of the electronic musical instrument 1 as seen from the front side. Fig. 2 is a perspective view of the electronic musical instrument 1 as seen from the rear side. The electronic musical instrument 1 is provided in the form of a rectangular flat plate. The electronic musical instrument 1 has a keyboard 11 on the front side, and an operation panel 12 behind the keyboard 11. The operation panel 12 is provided with a display screen, a power button, and operation buttons and dials for selecting and confirming settings. A grip portion 13 is provided behind the operation panel 12 (see also Fig. 2). The electronic musical instrument 1 of this embodiment is an electronic keyboard instrument with a keyboard 11 consisting of 61 keys, and can be carried around by holding the grip portion 13 in one hand, for example.

The electronic musical instrument 1 has an instrument case 10 including a first case 2, which is an upper case, and a second case 3, which is a lower case. The first case 2 has an elongated rectangular top surface 20 and side walls 21 (front wall 21a, rear wall 21b, left wall 21c, right wall 21d) that extend from the front, rear, left and right outer edges of the top surface 20 toward the second case 3. The second case 3 has an elongated rectangular bottom surface 30 and side walls 31 (front wall 31a, rear wall 31b, left wall 31c, right wall 31d) that extend from the front, rear, left and right outer edges of the bottom surface 30 toward the first case 2. The front wall 21a of the first case 2 includes a key front portion 21a2 that is set low in front of the keyboard 11 in accordance with the range of key movement, and includes a corner side front portion 21a3 that is set higher than the key front portion 21a2 and continues to the left side wall 21c and right side wall 21d on both the left and right sides of the key front portion 21a2 of the keyboard 11.

The electronic musical instrument 1 emits the sound generated by the speaker 7 to the outside from a sound emitting section 24 provided in at least one of the first case 2 and the second case 3 in correspondence with the speaker 7 (see FIG. 9, etc.). The first case 2 and the second case 3 are fixed by a fixing member 63 (see FIG. 6) so that a gap S1 (see FIGS. 6 to 11) is provided between the first case 2 and the second case 3 to allow the sound generated by the speaker 7 to be emitted to the outside from at least a portion of the outer periphery of the first case 2 and the second case 3. Each component will be described below.

Figure 3 is a rear view of the first case 2, and Figure 4 is a plan view of the second case 3. Also, Figure 5(a) is a partial perspective view seen from the rear side of the first case 2, and Figure 5(b) is a partial perspective view seen from the plan side of the second case 3. Figures 5(a) and 5(b) show a portion of the left side walls 21c, 31c of the first case 2 and second case 3.

As shown in FIG. 3, the front wall 21a and the rear wall 21b of the first case 2 are arranged substantially parallel to each other, and the left side wall 21c and the right side wall 21d are arranged substantially parallel to each other. The top surface 20 of the first case 2 is provided with a keyboard opening 22 in which the keyboard 11 is arranged, a through hole 23, and a sound emitting section 24 (see also FIGS. 1 and 2). The keyboard opening 22 and the through hole 23 are arranged substantially in the center of the longitudinal direction of the first case 2. The keyboard opening 22 is arranged in a rectangular shape that is elongated in the left-right direction. The sound emitting section 24 is arranged in two locations that are symmetrical to the left and right. The sound emitting section 24 includes a small hole 24a and a long hole 24b, and is connected to the inner and outer spaces in the thickness direction of the first case 2 (see also FIG. 9). Speakers 7 are arranged inside the first case 2 and the second case 3 corresponding to the left and right sound emitting sections 24 (see also FIGS. 9 and 10). The through holes 23 are elongated holes extending in the left-right direction. The top surface 20 of the first case 2 has a number of upper bosses (first mounting portions) 61 including screw holes 611 (see also FIG. 6). The upper bosses 61 are positioned at positions that are approximately symmetrical in the longitudinal direction of the first case 2.

As shown in the enlarged view of part A in FIG. 5(a), a plurality of first ribs 4 are provided on the inside of each side wall 21 (including the right side wall 21d, not shown). The first rib 4 has a protruding portion 41 that protrudes from the tip side of the edge portion 211 of the side wall 21, and a groove portion 42 that is provided between the protruding portion 41 and the end face 211a of the side wall 21 and engages with the engagement protrusion 311b (see FIG. 6) of the second case 3. The protruding portion 41 is provided in a substantially elongated rectangular shape, and a tapered inclined portion 412 is provided at the corner on the groove portion 42 side. The groove portion 42 has a flat bottom and is cut out so that the opening side is expanded by the inclined portion 412 and the inclined portion 211b. In addition, the end portion 411 of the protruding portion 41 protrudes toward the second case 3 side more than the end face 211a of the side wall 21 (see FIG. 6).

A first frame-shaped rib 25 that surrounds the speaker 7 is provided on the inside of the top surface 20 of the first case 2. The first frame-shaped rib 25 is surrounded by flat plate portions 251 to 254 and is provided in a substantially rectangular frame shape. The sound emitting portion 24 is provided inside the first frame-shaped rib 25. A rectangular cutout portion 254a is provided in the flat plate portion 254 on the through hole 23 side of the first frame-shaped rib 25. Note that while FIG. 5(a) shows the first frame-shaped rib 25 on the left side wall 21c of the first case 2, the first frame-shaped rib 25 is also provided on the right side wall 21d at a position that is substantially symmetrical inside the sound emitting portion 24.

As shown in FIG. 4, the front wall 31a and the rear wall 31b of the second case 3 are arranged substantially parallel to each other, and the left side wall 31c and the right side wall 31d are arranged substantially parallel to each other. A through hole 32 is provided in the bottom surface 30 at substantially the center of the longitudinal direction of the second case 3, corresponding to the through hole 23 (see FIG. 3) of the first case 2. The through hole 32 is provided as a long hole in the left-right direction. The bottom surface 30 of the second case 3 also has a plurality of lower bosses (second mounting portions) 62 including screw insertion holes 621 (see also FIG. 6). The lower bosses 62 are provided at positions substantially symmetrical to the upper bosses 61 (see FIG. 3) in the longitudinal direction of the second case 3.

As shown in the enlarged view of part B in FIG. 5(b), a plurality of second ribs 5 are provided on the inside of each side wall 31 (including the right side wall 31d, not shown). The second rib 5 has a long rectangular protruding portion 51 that protrudes from the tip side of the edge portion 311 of the side wall 31. A tapered inclined portion 51a is provided at the outer corner of the side wall 31 at the end portion 511 of the protruding portion 51. The protruding portion 51 protrudes toward the first case 2 side beyond the edge portion 311 including the engagement protrusion 311b (see FIG. 7).

A second frame-shaped rib 33 that surrounds the speaker 7 is provided on the inside of the bottom surface 30 of the second case 3. The second frame-shaped rib 33 is surrounded by flat plate portions 331 to 334 and is provided in a substantially rectangular frame shape. The flat plate portion 334 that is arranged on the through hole 32 side shown in FIG. 4 is arranged closer to the through hole 13a (23, 32) side than the flat plate portion 254 of the first case 2. The first case 2 and the second case 3 are fixed so that a gap S2 (described later) is provided between the first frame-shaped rib 25 and the second frame-shaped rib 33.

Next, the assembled state of the first case 2 and the second case 3 will be described. Figures 6(a) and 7(a) are respectively a VI-VI cross-sectional view and a VII-VII cross-sectional view enlarging the rear walls 21b, 31b of the electronic musical instrument 1 of Figure 1. Figure 6(b) is an enlarged view of part C in the cross-sectional view of Figure 6(a), and Figure 7(b) is an enlarged view of part D in the cross-sectional view of Figure 7(a). Figure 8(a) is an enlarged VIII-VIII cross-sectional view of the right side walls 21d, 31d of the electronic musical instrument 1 of Figure 1 as viewed from the rear, and Figure 8(b) is an enlarged view of part E in the cross-sectional view of Figure 8(a).

The first case 2 and the second case 3 are fixed to each other by the fixing member 63 shown in FIG. 6. The first case 2 is fixed to the upper side of the second case 3. In this embodiment, a screw is used as the fixing member 63. The fixing member 63 is screwed into the screw hole 611 of the upper boss 61 through the screw insertion hole 621 of the lower boss 62. As shown in FIG. 6(b), a tapered inclined portion 211b is provided on the inner surface of the tip side of the edge portion 211 of the first case 2. In addition, a flat end surface 311a is provided on the tip side of the edge portion 311 of the second case 3. An engagement protrusion 311b is provided on the end surface 311a on the inner side of the rear side wall 31b. An inclined portion 311c is provided on the side surface on the end surface 311a side of the engagement protrusion 311b. Therefore, when the first rib 4 is moved so as to abut against the inside of the edge 311 of the second case by fixing the first case 2 and the second case 3, the engagement protrusion 311b is easily guided to the bottom side of the groove 42 by the inclined portions 412, 211b, and 311c, and the engagement protrusion 311b engages in the groove 42 of the first rib 4.

The amount of protrusion of the engagement protrusion 311b from the end face 311a is greater than the height from the bottom of the groove 42 to the end face 211a (in other words, the depth from the end face 211a of the groove 42), so a gap S1 is provided between the edge 211 of the first case 2 and the edge 311 of the second case 3.

As shown in FIG. 7(b), when the first case 2 and the second case 3 are fixed, the protruding portion 51 of the second rib 5 provided on the rear side walls 21b, 31b is easily guided toward the inside of the first case 2 by the inclined portions 51a, 211b, so that the second rib 5 can abut against the inside of the edge portion 211 of the first case 2. In this manner, the second rib 5 and the edge portion 211 of the first case 2 are configured to abut against each other, so that the rigidity of the edge portions 211, 311 can be increased while providing a gap S1.

The second rib 5 provided on the right side wall 21d, 31d side shown in FIG. 8(b) is close to the inside of the first case 2. The protruding portion 51 of the second rib 5 on the right side wall 21d, 31d side is also easily guided to the inside of the first case 2 by the inclined portions 51a, 211b. With this configuration, it is possible to prevent contact between the end face 211a of the edge portion 211 of the first case 2 and the end face 311a of the edge portion 311 of the second case 3 while providing the gap S1. Note that the protruding portion 51 of the second rib 5 may be configured to abut against the inside of the edge portion 211 of the first case 2, similar to the second rib 5 on the rear side wall 31b side shown in FIG. 7. This allows the rigidity of the edge portions 211, 311 to be increased while providing the gap S1.

As shown in the enlarged view of part F in FIG. 4, the first rib 4 and the second rib 5 are arranged so as to be adjacent to each other alternately in the long direction along the front side walls 21a, 31a and the rear side walls 21b, 31b of the first case 2 and the second case 3, and in the short direction along the left side wall 21c, 31c and the right side wall 21d, 31d. This allows the rigidity of the edge portions 211, 311 to be increased while providing a gap S1. As in this embodiment, the first rib 4 and the second rib 5 are arranged alternately on the rear side walls 21b, 31b, the right side walls 21d, 31d, and the left side walls 21c, 31c, and one first rib 4 and one second rib 5 can be arranged at each of the left and right corner front portions 21a3 at positions corresponding to the front side walls 21a, 31a (see FIG. 2 and FIG. 3).

Figure 9 is an IX-IX cross-sectional view showing an enlarged view of the area around the speaker 7 on the right side of the electronic musical instrument 1 in Figure 1. Also, Figure 10 is an X-X cross-sectional view showing an enlarged view of the area around the speaker 7 on the right side of the electronic musical instrument 1 in Figure 1. When the first case 2 and the second case 3 are fixed together, a gap S2 is provided between the edge 25a of the first frame-shaped rib 25 and the edge 33a of the second frame-shaped rib 33. The first frame-shaped rib 25 and the second frame-shaped rib 33 function as a speaker box and house the speaker 7 inside. The speaker 7 is fixed to the first case 2 at a position corresponding to the sound emitting portion 24 so that it emits sound upward.

The speaker box formed by the first frame-shaped rib 25 and the second frame-shaped rib 33 can be configured as a housing for a semi-sealed speaker. Therefore, the sound generated by the speaker 7 is emitted outside the electronic musical instrument 1 after the sound pressure in a predetermined frequency band is adjusted mainly via the sound emission section 24 arranged on the top surface 20 of the first case 2.

On the other hand, some of the sounds generated by the speaker 7 are transmitted to the outside of the first frame-shaped rib 25 and the second frame-shaped rib 33 in the electronic musical instrument 1 through the gap S2 in the front flat plate portions 251, 331 and the rear flat plate portions 252, 332. The sounds emitted from the gap S2 on the rear side wall 21b side of the first frame-shaped rib 25 and the second frame-shaped rib 33 are transmitted to the rear side and emitted outside the electronic musical instrument 1 mainly through the gap S1 provided in the rear side walls 21b, 31b. In addition, the sounds emitted from the gap S2 on the keyboard 11 side are transmitted to the front side and emitted outside the electronic musical instrument 1 mainly through the gap S3 between the keyboard opening 22 and the keyboard 11.

Furthermore, as shown in FIG. 10, a portion of the sound emitted from the speaker 7 is transmitted to the outside of the first frame-shaped rib 25 and the second frame-shaped rib 33 through the gap S2 in the flat plate portions 253, 333 on the right side walls 21d, 31d. The sound transmitted to the outside from the gap S2 on the right side walls 21d, 31d passes through a gap (not shown in the figure) in the first case 2 and the second case 3 in FIG. 10 (for example, a gap located in the depth direction) and is emitted from the gap S1 on the right side walls 21d, 31d.

A portion of the sound emitted from the speaker 7 is transmitted to the grip portion 13 (see also FIG. 2, etc.), which is the right side in FIG. 10, via the notch 254a, etc. The sound transmitted to the outside of the first frame-shaped rib 25 and the second frame-shaped rib 33 is emitted to the outside from around the electronic musical instrument 1 via the gap S1 on the rear side walls 21b, 31b side, S3 on the keyboard 11 side, etc.

In this way, the first frame-shaped rib 25 and the second frame-shaped rib 33 surround the outer periphery of the speaker 7 to make it a semi-sealed speaker, which makes it possible to increase the sound pressure of the sound emitted from the sound emission section 24. In addition, by providing gaps S2 and S3, the sound produced by the speaker 7 is emitted to the outer periphery not only from the sound emission section 24 but also from the gaps S2 and S3, making it possible to configure the sound to be clearly heard around the electronic musical instrument 1 through the gap S1.

Figure 11 is a cross-sectional view of the electronic musical instrument 1 of Figure 1 taken along the line XI-XI. Figure 11 shows a cross-section at the middle position in the left-right direction of the electronic musical instrument 1, and shows the front walls 21a, 31a and the rear walls 21b, 31b with the middle omitted.

The grip part 13 on the rear side of the electronic musical instrument 1 is provided in a rod-like shape suspended on the left and right sides by a through hole 13a (23, 32) provided penetrating from the top surface 20 side of the first case 2 to the bottom surface 30 side of the second case 3 (see also FIG. 2). An inner peripheral wall 231 extending from the inner edge of the through hole 23 toward the second case 3 side and an inner peripheral wall 321 extending from the inner edge of the through hole 32 toward the first case 2 side are in contact with each other. The connection part 13b1 of the first case 2 and the second case 3 at the inner wall 13b of the through hole 13a is fixed in close contact. Therefore, the sound generated by the speaker 7 is not emitted to the outside from this connection part 13b1. The respective ends 231a, 321a of the edge parts of the inner peripheral wall 231 and the inner peripheral wall 321 are fixed in close contact by face abutment or line abutment. The grip portion 13 can be formed by the outer surfaces of the first case 2 and the second case 3, including the inner peripheral wall 231 and the inner peripheral wall 321, which are part of the inner wall 13b of the through hole 13a.

In addition, as shown in Figures 3 and 4, the first ribs 4 and the second ribs 5 in the gripping portion 13 can be arranged with a higher density than the first ribs 4 and the second ribs 5 provided in other positions. This can increase the rigidity of the gripping portion 13.

In addition, in FIG. 11, the edge 21a1 of the key front portion 21a2 in front of the keyboard 11 of the electronic musical instrument 1 and the edge 31a1 of the front wall 31a are in almost tight contact with each other. Therefore, sound emission from between the first case 2 and the second case 3 on the front side of the electronic musical instrument 1 can be suppressed. Sound transmitted from the speaker 7 to the front side through the gap S2 can also be emitted from the gap S4 provided between the keyboard 11 and the inner edge on the front side of the keyboard opening 22.

On the other hand, the aforementioned gap S1 is provided continuously in the front walls 21a, 31a (see Figures 1, 3 and 4), the left side walls 21c, 31c, the rear walls 21b, 31b and the right side walls 21d, 31d located near the left and right corners of the keyboard opening 22. Therefore, the sound generated from the speaker 7 is emitted mainly from the sound emission section 24 provided on the top side of the electronic musical instrument 1, and is also emitted from the surroundings. Therefore, the electronic musical instrument 1 can emit sound well to the surroundings.

In this embodiment, a gap S1 is provided between the first case 2 and the second case 3, making it possible to prevent rattling noises with an inexpensive structure without the need for a cushioning material such as a rubber packing.

In addition, the continuous parts at the edges 211, 311 of the first case 2 and the second case 3 can reduce the unevenness of the outer surface while providing a gap S1, improving the appearance of the electronic musical instrument 1.

In this embodiment, the sound emitting section 24 including the small hole 24a and the long hole 24b is provided in the first case 2, but the sound emitting section 24 can be provided in either or both of the first case 2 and the second case 3.

The first rib 4 and the second rib 5 may be provided on the edges 211, 311 of both the first case 2 and the second case 3, or the first rib 4 may be provided on the second case 3 and the second rib 5 on the first case 2.

In the above, in this embodiment, an electronic musical instrument 1 has been described that includes a first case 2, a second case 3, a speaker 7 disposed inside the first case 2 and the second case 3, and a fixing member 63 that fixes the first case 2 and the second case 3 to each other. In this electronic musical instrument 1, the sound emitted by the speaker 7 is emitted to the outside from a sound emission section 24 provided in at least one of the first case 2 and the second case 3 corresponding to the speaker 7, and the first case 2 and the second case 3 are fixed by the fixing member 63 so that a gap S1 is provided between the first case 2 and the second case 3 to emit the sound emitted by the speaker 7 to the outside from at least a part of the outer periphery of the first case 2 and the second case 3.

Providing this gap S1 makes it possible to prevent the outer peripheries of the first case 2 and second case 3 from coming into contact due to vibrations caused by sound from the speaker 7, thereby preventing the generation of so-called buzzing noises. In addition, since sound from the speaker 7 can be emitted from both the sound-emitting section 24 and the outer periphery gap S1, the electronic musical instrument 1 can emit a wide-ranging sound that can be easily heard by those around it. This makes it possible to produce an electronic musical instrument 1 that produces good sound.

In addition, the electronic musical instrument 1 has a first rib 4 on the inside of the edge 211 of the first case 2, which abuts against the inside of the edge 311 of the second case 3, thereby increasing the rigidity of the edges 211, 311 and maintaining the gap.

The electronic musical instrument 1 also has a second rib 5 on the inside of the edge 311 of the second case 3 that abuts against the inside of the edge 211 of the first case 2, which increases the rigidity of the edges 211, 311 and maintains the gap.

Also, a configuration has been described in which the inside of the edge 211 of the first case 2 has a plurality of first ribs 4 that abut against the inside of the edge 311 of the second case 3, and the inside of the edge 311 of the second case 3 has a plurality of second ribs 5 that abut against the inside of the edge 211 of the first case 2, and the plurality of first ribs 4 and the plurality of second ribs 5 are alternately arranged inside the first case 2 and the second case 3. This can further increase the rigidity of the edges 211, 311 and stably maintain the gap spacing.

Also, a first frame-shaped rib 25 that surrounds the speaker 7 is provided inside the first case 2, and a second frame-shaped rib 33 corresponding to the first frame-shaped rib 25 is provided inside the second case 3, and a configuration has been described in which the first case 2 and the second case 3 are fixed by a fixing member 63 so that a gap S2 is provided between the first frame-shaped rib 25 and the second frame-shaped rib 33. This makes it possible to form a buffless type speaker box and increase the sound pressure of the sound emitted from the speaker 7. Also, the sound from the speaker 7 can be emitted around the electronic musical instrument 1 through the gaps S2 and S1.

The electronic musical instrument 1 has been described as having a structure in which the first case 2 and the second case 3 are fixed to form an instrument case 10 including the first case 2 and the second case 3, and a through hole 13a (23, 32) that penetrates from the top surface 20 side to the bottom surface 30 side, and a gripping portion 13 that includes a part of the inner wall 13b of the through hole 13a. The connecting portion 13b1 of the first case 2 and the second case 3 at the inner wall 13b of the through hole 13a is fixed in close contact with each other so that the sound generated by the speaker 7 is not emitted to the outside from the connecting portion 13b1 of the first case 2 and the second case 3 at the inner wall 13b of the through hole 13a. Therefore, a gap S1 can be provided around the instrument case 10 while increasing the rigidity of the gripping portion 13.

Also, the first case 2 is fixed to the upper side of the second case 3, the speaker 7 is fixed to the first case 2 so as to emit sound toward the upper side, and the sound emission section 24 is provided in the first case 2. The vibration of the body of the speaker 7 is transmitted in the order of the first case 2 arranged on the upper side, the fixed part by the fixing member 63, the second case 3 below, and the mounting surface of the electronic musical instrument 1. Therefore, the vibration suppression of the speaker 7 is reduced, allowing for good initial sound.

The second case 3 has a lower boss 62 including a screw insertion hole 621, the first case 2 has an upper boss 61 including a screw hole 611, and the fixing member 63 is screwed into the screw hole 611 of the upper boss 61 through the screw insertion hole 621 of the lower boss 62. This allows the first case 2 and the second case 3 to be reliably fixed together with a simple structure.

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 variations are included within the scope and essence of the invention, and are included in the scope of the invention and its equivalents as set forth in the claims.

The invention described in the first claim of this application is set forth below.
[1] A first case,
The second case,
a speaker disposed inside the first case and the second case;
a fixing member that fixes the first case and the second case to each other;
Equipped with
An electronic musical instrument, in which the first case and the second case are fixed by the fixing member so that a gap is provided between the first case and the second case to allow the sound generated by the speaker to be emitted to the outside from a sound emission section provided in at least one of the first case and the second case corresponding to the speaker, and so that the first case and the second case are fixed by the fixing member so that the gap allows the sound generated by the speaker to be emitted to the outside from at least a portion of the outer periphery of the first case and the second case.
[2] The electronic musical instrument according to [1], further comprising a first rib on the inside of the edge of the first case, the first rib being in contact with the inside of the edge of the second case.
[3] The electronic musical instrument according to [1], further comprising a second rib on the inside of the edge of the second case, the second rib being in contact with the inside of the edge of the first case.
[4] A plurality of first ribs are provided on an inner side of an edge of the first case and abut against an inner side of an edge of the second case, and a plurality of second ribs are provided on an inner side of the edge of the second case and abut against an inner side of the edge of the first case,
The electronic musical instrument according to [1], wherein the first ribs and the second ribs are alternately arranged inside the first case and the second case.
[5] An electronic musical instrument described in any of [1] to [4], wherein a first frame-shaped rib surrounding the speaker is provided on the inside of the first case, and a second frame-shaped rib corresponding to the first frame-shaped rib is provided on the inside of the second case, and the first case and the second case are fixed by the fixing member so that a gap is provided between the first frame-shaped rib and the second frame-shaped rib.
[6] When the first case and the second case are fixed together, the instrument case including the first case and the second case includes a through hole penetrating from a top surface side to a bottom surface side, and a grip portion including a part of an inner wall of the through hole,
The electronic musical instrument described in any of [1] to [5], wherein the connecting portion of the first case and the second case on the inner wall of the through hole is tightly fixed so that sound emitted by the speaker is not emitted to the outside from the connecting portion of the first case and the second case on the inner wall of the through hole.
[7] The first case is fixed to an upper side of the second case,
the speaker is fixed to the first case so as to emit sound upward;
The sound emitting unit is provided in the first case.
7. An electronic musical instrument according to any one of claims 1 to 6.
[8] The second case has a lower boss including a screw insertion hole,
the first case has an upper boss including a screw hole;
8. The electronic musical instrument according to any one of claims 1 to 7, wherein the fixing member is screwed into the screw hole of the upper boss through the screw insertion hole of the lower boss.

REFERENCE SIGNS LIST 1 Electronic musical instrument 2 First case 3 Second case 4 First rib 5 Second rib 7 Speaker 10 Musical instrument case 11 Keyboard 12 Operation panel 13 Grip portion 13a Through hole 13b Inner wall 13b1 Connection portion 20 Top surface 21 Side wall 21a Front wall 21a1 Edge portion 21a2 Key front portion 21a3 Corner front portion 21b Rear wall 21c Left side wall 21d Right side wall 22 Keyboard opening 23 Through hole 24 Sound output portion 24a Small hole 24b Long hole 25 First frame-shaped rib 25a Edge portion 30 Bottom surface 31 Side wall 31a Front wall 31a1 Edge portion 31b Rear wall 31c Left side wall 31d Right side wall 32 Through hole 33 Second frame-shaped rib 33a Edge portion 41 Projection 42 Groove 51 Projection 51a Inclined portion 61 Upper boss 62 Lower boss 63 Fixing member 211 Edge 211a End face 211b Inclined portion 231 Inner circumferential wall 231a End 251 Flat plate portion 252 Flat plate portion 253 Flat plate portion 254 Flat plate portion 254a Notch 311 Edge 311a End face 311b Engagement protrusion 311c Inclined portion 321 Inner circumferential wall 321a End 331 Flat plate portion 332 Flat plate portion 333 Flat plate portion 334 Flat plate portion 411 End 412 Inclined portion 511 End 611 Screw hole 621 Screw insertion holes S1 to S4 Gap

Claims (7)

The first case,
The second case,
a speaker disposed inside the first case and the second case;
a fixing member that fixes the first case and the second case to each other;
Equipped with
a first rib on an inner side of an edge of the first case and in contact with an inner side of an edge of the second case;
An electronic musical instrument, in which the first case and the second case are fixed by the fixing member so that a gap is provided between the first case and the second case to allow the sound generated by the speaker to be emitted to the outside from a sound emission section provided in at least one of the first case and the second case corresponding to the speaker, and so that the first case and the second case are fixed by the fixing member so that the gap allows the sound generated by the speaker to be emitted to the outside from at least a portion of the outer periphery of the first case and the second case. The first case,
The second case,
a speaker disposed inside the first case and the second case;
a fixing member that fixes the first case and the second case to each other;
Equipped with
a second rib on an inner side of an edge of the second case and in contact with an inner side of an edge of the first case;
An electronic musical instrument, in which the first case and the second case are fixed by the fixing member so that a gap is provided between the first case and the second case to allow the sound generated by the speaker to be emitted to the outside from a sound emission section provided in at least one of the first case and the second case corresponding to the speaker, and so that the first case and the second case are fixed by the fixing member so that the gap allows the sound generated by the speaker to be emitted to the outside from at least a portion of the outer periphery of the first case and the second case. The first case,
The second case,
a speaker disposed inside the first case and the second case;
a fixing member that fixes the first case and the second case to each other;
Equipped with
a plurality of first ribs on an inner side of an edge of the first case and a plurality of second ribs on an inner side of an edge of the second case and a plurality of second ribs on an inner side of an edge of the second case and abutting against an inner side of the edge of the first case;
the first ribs and the second ribs are alternately arranged inside the first case and the second case,
An electronic musical instrument, in which the first case and the second case are fixed by the fixing member so that a gap is provided between the first case and the second case to allow the sound generated by the speaker to be emitted to the outside from a sound emission section provided in at least one of the first case and the second case corresponding to the speaker, and so that the first case and the second case are fixed by the fixing member so that the gap allows the sound generated by the speaker to be emitted to the outside from at least a portion of the outer periphery of the first case and the second case. a first frame-shaped rib surrounding the periphery of the speaker is provided inside the first case, and a second frame-shaped rib corresponding to the first frame-shaped rib is provided inside the second case, and the first case and the second case are fixed by the fixing member such that a gap is provided between the first frame-shaped rib and the second frame-shaped rib.
4. An electronic musical instrument according to claim 1 . When the first case and the second case are fixed together, the instrument case including the first case and the second case has a through hole penetrating from a top surface side to a bottom surface side, and a grip portion including a part of an inner wall of the through hole,
The connecting portion of the first case and the second case on the inner wall of the through hole is tightly fixed to the connecting portion of the first case and the second case on the inner wall of the through hole so that the sound generated by the speaker is not emitted to the outside.
5. An electronic musical instrument according to claim 1 . The first case is fixed to an upper side of the second case,
the speaker is fixed to the first case so as to emit sound upward;
The sound emitting unit is provided in the first case.
6. An electronic musical instrument according to claim 1 . the second case has a lower boss including a screw insertion hole;
the first case has an upper boss including a screw hole;
7. The electronic musical instrument according to claim 1, wherein the fixing member is threadedly engaged with the screw hole of the upper boss through the screw insertion hole of the lower boss.

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