Electronic equipment

Abstract

To provide electronic equipment capable of enhancing sound effects.SOLUTION: An electronic keyboard musical instrument comprises a main body case 30, a right tweeter pair 60 installed on the right side of the main body case 30 and having multiple sound emitting members with different main sound emission directions from each other, and a left tweeter pair 60 installed on the left side of the main body case 30 and having multiple sound emitting members with different main sound emission directions from each other. The sound interference occurrence between a pair of the tweeter 60 is suppressed for each of the right tweeter pair 60 and the left tweeter pair 60 and this allows the sound emitted from each tweeter 60 to reach the performer more effectively. Therefore, the sound effect of the electronic keyboard musical instrument can be improved.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to electronic devices. [Background technology]

[0002] Conventionally, electronic devices equipped with multiple speakers have been known. For example, Patent Document 1 discloses an electronic keyboard instrument equipped with a main speaker for high range and a main speaker for mid-low range. In this electric keyboard instrument, the main speaker for high range and the main speaker for mid-low range are arranged in parallel in the left-right direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 9-212167 Summary of the Invention [Problem to be solved by the invention]

[0004] In electronic devices, it is sometimes desirable to place a sub-speaker in addition to a main speaker in order to expand the range of sound emitted from the speaker and improve the acoustic effect. However, if multiple sub-speakers are provided inside an electronic keyboard instrument, the sound will be emitted from different locations, which may prevent the acoustic effect from being sufficiently improved.

[0005] An object of the present invention is to provide an electronic device capable of improving the acoustic effect. [Means for solving the problem]

[0006] The electronic device of the present invention comprises a housing, a first sound emitting section provided on one side of the housing in the left-right direction and having a plurality of sound emitting members whose main sound emitting directions are different from each other, and a second sound emitting section provided on the other side of the housing in the left-right direction and having a plurality of sound emitting members whose main sound emitting directions are different from each other. Effect of the Invention

[0007] According to the present invention, it is possible to provide an electronic device capable of improving the acoustic effect. [Brief description of the drawings]

[0008] [Figure 1] 1 is a general perspective view of an electronic keyboard instrument according to an embodiment, as viewed from the front side; [Diagram 2] 2 is a cross-sectional view of a main body of the electronic keyboard instrument according to the embodiment, taken along line II-II in FIG. 1. [Diagram 3] 2 is a bottom view of the front top plate, cover plate, perforated member, and tweeter pair of the electronic keyboard instrument according to the embodiment, as viewed from below. FIG. [Figure 4] FIG. 2 is a top view of the main body of the electronic keyboard instrument according to the embodiment with the front top plate, rear top plate, and cover plate removed. [Diagram 5] 1 is a perspective view of a pair of tweeters on one side of an electronic keyboard instrument according to an embodiment, and their vicinity, as viewed from the rear and below. FIG. [Figure 6] 6 is a cross-sectional view of the main body of the electronic keyboard instrument according to the embodiment, taken along the line VI-VI in FIG. 4, as viewed from the side. FIG. [Figure 7] FIG. 2 is a top view of a tweeter pair on one side of the electronic keyboard instrument according to the embodiment, as viewed from above. [Figure 8] FIG. 2 is a side view of a tweeter pair on one side of the electronic keyboard instrument according to the embodiment, as viewed obliquely from the front right side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of the present invention will be described with reference to the drawings. An electronic keyboard instrument (electronic device) 1 shown in FIG. 1 includes a main body 10 and a leg 100. As shown in FIG. 1, the main body 10 includes a keyboard (operator) 20 having a plurality of keys 22 consisting of white keys 22W and black keys 22B, with the keying portion exposed, and a main body case (housing) 30 that surrounds and holds the keyboard 20. The leg 100 includes a pair of side plate members 110, a pedal frame 120, and a pedal device 130. In the following description, the arrangement direction of the plurality of keys 22 of the keyboard 20 is the left-right direction (the left side of FIG. 1 is the left direction), the extension direction of each key 22 is the front-rear direction (the front side of FIG. 1 is the front direction), and the up-down direction of the electronic keyboard instrument 1 is the up-down direction (the upper side of FIG. 1 is the up direction).

[0010] As shown in FIG. 1, the pair of side plate members 110 are plate-like members that are erected on the installation surface on both the left and right sides of the electronic keyboard instrument 1 with both plate surfaces facing the left and right directions, and support the main body 10 or the main body case 30. The pedal frame 120 connects the side plate members 110 below each other. The pedal device 130 is provided in the approximate center of the pedal frame 120 in the left and right direction. In the electronic keyboard instrument 1, the main body case 30 of the main body 10 and each side plate member 110 of the leg 100 that are exposed to the outside are made of wood or have a wood-grain surface, giving them a distinctive texture. The configuration of the main body 10 will be described in detail below.

[0011] As shown in Figs. 1 to 5, the main body case 30 is a horizontally elongated, generally rectangular shape with the left-right direction as viewed from above and below, and includes thick plate-like members, such as a front panel 32, a rear panel 33, a left panel 34, a right panel 35, a front top panel 36F, a rear top panel 36B, and a bottom panel 37, and the vertical section of the main body case 30 is generally L-shaped as viewed from the left side. Fig. 2 shows the main body case 30 from the rear side with the rear panel 33 removed (or omitted), and Fig. 4 shows the main body case 30 from above with the front top panel 36F, the rear top panel 36B, and a cover panel 11, which will be described later, removed (or omitted). The front panel 32 is generally rectangular and elongated in the left-right direction, and is provided at the lower part of the front end of the main body 10 and below the keyboard 20 to form the front surface of the main body case 30. A power button 32a for switching the main power on and off is provided at the right end of the front panel 32 (see FIG. 1). The rear panel 33 has a generally rectangular shape that is long in the left-right direction, and is provided at the rear of the main body 10 to form the rear of the main body case 30.

[0012] The left side panel 34 and the right side panel 35 are both substantially rectangular in shape and elongated in the front-rear direction, and a step called an arm is provided in the substantially central portion in the front-rear direction so that the front side is at substantially the same height as the keyboard 20. The left side panel 34 and the right side panel 35 are provided on the left and right sides of the main body 10, respectively, and constitute the left and right sides of the main body case 30. The front top panel 36F is substantially rectangular in shape and elongated in the left-right direction, and is provided on the front side of the upper rear part of the main body 10, and constitutes a part of the top surface of the main body case 30. The rear top panel 36B is substantially rectangular in shape and elongated in the left-right direction, and is provided on the rear side of the upper rear part of the main body 10, and constitutes a part of the top surface of the main body case 30. As shown in FIG. 1 and FIG. 4, a volume panel section 24 in which a volume knob 24a and the like are arranged is provided between the keyboard 20 and the arm of the right side panel 35. Between the keyboard 20 and the left side plate 34, there is provided a setting panel section 26 on which various setting buttons 26a and the like are arranged.

[0013] As shown in Figs. 1, 2, and 5, the rear top panel 36B is attached to the rear panel 33 so as to be rotatable so that the front side opens. A cover plate 11, which is a substantially rectangular plate long in the left-right direction, is provided on the lower side of the rear top panel 36B with both plate surfaces facing the up-down direction. The cover plate 11 is provided with a plurality of substantially rectangular upper openings 11a that open upward from the inside of the main body case 30 at intervals in the left-right direction (see Figs. 1 and 3). The upper and side surfaces of the cover plate 11 are covered with a saran net. When the rear top panel 36B is open, the openings on the lower side of the rear top panel 36B are covered by the cover plate 11 so that the inside of the main body case 30 cannot be seen from the outside. In addition, a music stand 36F1 is attached to the front top panel 36F at approximately the center in the left-right direction. The lower panel 37 is a substantially rectangular plate long in the left-right direction, and is provided below the main body part 10 to form the lower surface of the main body case 30.

[0014] As shown in Figures 4 and 6, a console member 12, which is a generally rectangular plate long in the left-right direction, is provided behind each key 22 of the keyboard 20 with both plate surfaces facing up and down. The console member 12 is provided so as to cover the rear ends of each key 22 of the keyboard 20 at a position where it overlaps with the front end of the front top plate 36F in the up-down direction. The console member 12 prevents the inside of the main body case 30 from being seen from outside the electronic keyboard instrument 1 through the gap at the rear end of the keyboard 20. In addition, the provision of the console member 12 behind each key 22 restricts the movement of each key 22 in the front-rear direction.

[0015] As shown in FIG. 2, a plurality of first sheet metal members 13, each of which is substantially plate-shaped and extends downward with both plate surfaces facing the front-rear direction, are provided at intervals along the left-right direction at the rear end of the lower surface of the console member 12. The lower end of the first sheet metal member 13 is attached to the lower plate 37. The rear side of the keyboard 20 is fixed to the main body case 30 by the first sheet metal member 13. As shown in FIG. 6, the space in front of the first sheet metal member 13 is a space provided below the keyboard 20. The lower end of the first sheet metal member 13 is provided with a plurality of through holes 13a penetrating in the front-rear direction. The front and rear spaces of the first sheet metal member 13 inside the main body case 30 are communicated between the plurality of first sheet metal members 13 and through the through holes 13a provided in the first sheet metal member 13. For this reason, the structure is such that sounds generated from speakers 50R and 50L described later are easily released from the front of the main body part 10 through the through holes 13a.

[0016] As shown in FIG. 4, the main body case 30 has an opening at the front upper side between the front panel 32 and the console member 12, and a part of the top surface and the front surface, which are the striking surfaces of each key 22 of the keyboard 20, are exposed to the outside from this opening. The main body 10 is provided with a foldable key cover 38 that covers the part of the keyboard 20 exposed to the outside when closed. The key cover 38 is a thick plate-like member, and a front cover part 38a and a rear cover part 38b, which are plate-like members having a substantially rectangular shape elongated in the left-right direction, are arranged side by side in the front-rear direction when closed, and are stored in a bent state in the space behind the keyboard 20 when opened (see FIG. 6). The front cover part 38a is rotatably connected to the front link member FL fixed to the main body case 30 via the front attachment member 14 having a horizontally elongated shape. Two horizontally elongated substantially rectangular attachment openings 14a that open so as to penetrate the front attachment member 14 in the front-rear direction are provided on both sides in the left-right direction, respectively, in a portion (handle portion) near the center of the front attachment member 14.

[0017] As shown in Fig. 6, the rear cover portion 38b is rotatably connected to the rear link member BL fixed to the main body case 30 via a horizontally elongated rear attachment member 15. The front cover portion 38a and the rear cover portion 38b are connected in a bifold manner via hinges, and are stored in and out of the space behind the first sheet metal member 13 inside the main body case 30 through a gap between the console member 12 and a display panel 18 (described later). When the main power supply of the electronic keyboard instrument 1 is turned off, the key cover 38 is pulled out from inside the main body portion 10 to cover the opening of the main body case 30 through which the keyboard 20 is exposed, and the exposed portion of the keyboard 20 is covered.

[0018] In the electronic keyboard instrument 1, when the keyboard 20 is covered by the key cover 38, the gap between the console member 12 and the display panel 18 is covered by the rear attachment member 15. Furthermore, when the main power supply is turned on and the key cover 38 is stored in the space behind the first sheet metal member 13, a gap is generated between the lower panel 37 and the rear attachment member 15. Therefore, when the key cover 38 is stored, the inside of the main body case 30 is partitioned into a front space FS provided in front of the key cover 38 and a rear space BS provided behind the key cover 38, but the front space FS and the rear space BS are connected by the gap.

[0019] As shown in Figs. 2 and 3, the second sheet metal member 16 extending in the left-right direction is attached to the lower surface of the front top plate 36F. As shown in Fig. 5, the second sheet metal member 16 is provided in a step-like manner up and down via a step portion 16a. A display plate 18, which is a substantially rectangular thick plate long in the left-right direction, is provided in front of the lower stage of the second sheet metal member 16 with both plate surfaces facing the front-rear direction. The display plate 18 is provided between the front top plate 36F and the key cover 38 with gaps opening to the front side on both the top and bottom sides. The gap G between the display plate 18 and the front top plate 36F is a route through which a part of the sound from the tweeter 60 described later is emitted to the outside of the electronic keyboard instrument 1. The display plate 18 covers most of the space between the key cover 38 and the front top plate 36F so that the rear space BS is not visible. The display plate 18 displays information about the performance of the electronic keyboard instrument 1 on a display surface provided on its front side.

[0020] A perforated member 40, which is a substantially rectangular plate long in the left-right direction, is attached to the front side of the upper stage part of the second sheet metal member 16 by screwing with both plate surfaces facing the front-rear direction. The perforated member 40 is provided on the front side of a tweeter 60 described later. As shown in FIG. 5, a plurality of openings 16b opening in the front-rear direction are provided at intervals in the left-right direction in the upper stage part of the second sheet metal member 16, and the perforated member 40 communicates with the front side and the rear side of the second sheet metal member 16 through each opening 16b. The perforated member 40 is made of resin formed by injection molding, and is provided with a plurality of substantially honeycomb-shaped holes 40a that open from the inside of the main body case 30 toward the front side (penetrating in the plate thickness direction). As shown in FIG. 4, the lower part of the perforated member 40 overlaps with the display plate 18 in the front-rear direction.

[0021] As shown in Fig. 2 and Fig. 4, the electronic keyboard instrument 1 is provided with a total of four speakers (third sound emitting units) 50R, 50L, one pair on the rear side of the upper surface of the lower panel 37, below the keyboard 20 in the rear space BS. Each speaker 50R, 50L is provided below and rearward of the keyboard 20, with the speaker sound emitting units 50R1, 50L1 having a substantially truncated cone shape disposed above the lower panel 37. Sound from each speaker sound emitting unit 50R1, 50L1 is emitted into the rear space BS, etc. One pair of speakers 50R (hereinafter also referred to as the "right speaker pair 50R") is provided at a position toward the right side of the upper surface of the lower panel 37. The other pair of speakers 50L (hereinafter also referred to as the "left speaker pair 50L") are arranged in parallel with the right speaker pair 50R in the left-right direction and are positioned toward the left side of the upper surface of the lower panel 37. Both speakers 50R and 50L emit sounds in a relatively low range compared to the range of sounds emitted by a tweeter pair 60 described below.

[0022] A pair of tweeters (e.g., first sound output section) 60 is provided in the rear space BS above the keyboard 20 at a position diagonally above the front side of the left speaker pair 50L, and a pair of tweeters 60 (e.g., second sound output section) is also provided at a position diagonally above the front side of the right speaker pair 50R. That is, the electronic keyboard instrument 1 has a total of four tweeters 60 on both the left and right sides in the rear space BS. Each tweeter 60 has a function as a sub-speaker that outputs a high-frequency sound of 1 kHz or more, and the sound output direction of each of them is directed toward the approximately front side of the main body 10. Hereinafter, the pair of tweeters 60 provided on the right side of the rear space BS is also referred to as the "right tweeter pair 60", and the pair of tweeters 60 provided on the left side of the rear space BS is also referred to as the "left tweeter pair 60". The right tweeter pair 60 and the left tweeter pair 60 are the same member.

[0023] The right tweeter pair 60 and the left tweeter pair 60 are arranged at positions symmetrical with respect to the center in the left-right direction of the main body case 30, and are respectively attached to the lower surface of the front top plate 36F by screwing via a third sheet metal member (attachment member) 19. The pair of tweeters 60 attached to one third sheet metal member 19 are arranged close to each other in the left-right direction. As shown in Figs. 5, 7, and 8, each third sheet metal member 19 has a fixing portion 19a fixed to the lower surface of the front top plate 36F by screwing in a manner sandwiching the second sheet metal member 16 therebetween, and a pair of attachment portions 19b extending downward from the front end of the fixing portion 19a and to which the pair of tweeters 60 are attached. The fixing portion 19a extends parallel to the lower surface of the front top plate 36F.

[0024] The fixing portion 19a is screwed to the front top plate 36F at three locations in total, using two screw holes H1 provided at symmetrical positions on the rear side and one screw hole H2 provided at the center in the left-right direction on the front side. Each mounting portion 19b extends diagonally downward and forward from the fixing portion 19a so as to be symmetrical on the left-right side in accordance with the sound emission direction of each tweeter 60, as described later.

[0025] As shown in FIG. 5, FIG. 7, and FIG. 8, each tweeter 60 has a tweeter body 61 having a substantially short cylindrical shape, and a pair of protruding parts 62 protruding outward from both the left and right sides of the tweeter body 61 in a substantially plate-like shape. The tweeter body 61 is disposed so that its main sound emission direction X is inclined obliquely with respect to the front-rear direction and with respect to the up-down direction. The front part of the tweeter body 61 is in a stepped shape that is recessed backward toward the inside, and serves as a tweeter sound emission part 60a from which sound is emitted. The main sound emission direction X of each tweeter 60 is substantially the same as the column axis direction of the tweeter body 61. Here, the main sound emission direction X refers to the direction in which the sound pressure is maximum within the range S of the sound emitted from each tweeter sound emission part 60a, as shown in FIG. 7.

[0026] In order to emit high-pitched sounds having relatively high directivity over a wide range, it is preferable that the pair of tweeters 60 attached to one third sheet metal member 19 are oriented such that the range S of the sounds emitted from each tweeter sound-emitting portion 60a is wide. For this reason, as shown in Fig. 6 and Fig. 7, the pair of tweeters 60 are provided such that their respective main sound-emitting directions X1, X2 are inclined in the left-right direction with respect to a front elevation angle direction Y that faces the front as viewed from the electronic keyboard instrument 1 and has the same elevation angle (angle θ4 described later) as the elevation angle of the main sound-emitting direction X. In more detail, the main sound-emitting direction X of one tweeter 60 is provided toward the center of the main body case 30 in the left-right direction, and the main sound-emitting direction X of the other tweeter 60 is provided toward the outside of the main body case 30 in the left-right direction. The pair of tweeters 60 are also provided so that the sound emission direction faces slightly upwards so that the elevation angle of each of them is θ4 in the vertical direction.

[0027] The pair of overhanging portions 62 are provided with both plate surfaces facing obliquely in the front-to-rear direction, and the normal direction of the plate surfaces, together with the normal direction of the front plate surface of each mounting portion 19b of the third sheet metal member 19, approximately coincides with the main sound emission direction X of the tweeter 60 attached to the overhanging portion 62. Each tweeter 60 is attached to the third sheet metal member 19 by screwing each overhanging portion 62 to each mounting portion 19b of the third sheet metal member 19. That is, each of the pair of tweeters 60 attached to one third sheet metal member 19 has both left-right sides attached to the third sheet metal member 19.

[0028] Here, the arrangement of the tweeters 60 and the specific sound emission angles will be described. As shown in Fig. 2, on the right side of the main body case 30, the pair of tweeters 60 attached to one third sheet metal member 19 are arranged so that the interval W2 between the centers of the tweeters 60 in the left-right direction is smaller than the interval W1R between the centers of the speaker sound emission parts 50R1 of the right speaker pair 50R in the left-right direction. Similarly, on the left side of the main body case 30, the pair of tweeters 60 are arranged so that the interval W2 between the centers of the tweeters 60 in the left-right direction is smaller than the interval W1L between the centers of the speaker sound emission parts 50L1 of the left speaker pair 50L in the left-right direction. In addition, the right tweeter pair 60 is positioned above the right speaker pair 50R so that the centers of each speaker sound emitting portion 50R1 are both within the left-right distance between the centers of the right speaker pair 50R in the left-right direction (within the range of the distance W1R in Figure 2), and the left tweeter pair 60 is positioned above the left speaker pair 50L so that the centers of each speaker sound emitting portion 50L1 are both within the left-right distance between the centers of the left speaker pair 50L in the left-right direction (within the range of the distance W1L in Figure 2).

[0029] Also, the central position C2 of the right tweeter pair 60 in the left-right direction is located closer to the center in the left-right direction of the main body case 30 than the central position C1R of the right speaker pair 50R in the left-right direction. Similarly, the central position C2 of the left tweeter pair 60 in the left-right direction is located closer to the center in the left-right direction of the main body case 30 than the central position C1L of the left speaker pair 50L in the left-right direction. Note that, although the right tweeter pair 60 and the left speaker pair 50L are located at the same height within the main body case 30, there are no particular limitations on the vertical distance between the right speaker pair 50R and the right tweeter pair 60, and the vertical distance between the left speaker pair 50L and the left tweeter pair 60.

[0030] As shown in Fig. 7, the pair of tweeters 60 attached to one third sheet metal member 19 are provided so that the sound emission angle in the left-right direction is an acute angle. Specifically, the pair of tweeters 60 are provided so that the angle θ1 between one main sound emission direction X1 and the other main sound emission direction X2 in the left-right direction is smaller than 90° and larger than 60°, more preferably smaller than 78° and larger than 70°, and even more preferably smaller than 75° and larger than 73°. The sound emitted from the pair of tweeters 60 is in the high-frequency range and is therefore less likely to diffuse than the low-frequency range. Here, if the angle θ1 between one main sound emission direction X1 and the other main sound emission direction X2 in the left-right direction exceeds 90°, a range N in which the sound from the pair of tweeters 60 is difficult to propagate may be generated between the sound range S1 in the main sound emission direction X1 from one tweeter sound emission section 60a surrounded by a dashed line and the sound range S2 in the main sound emission direction X2 from the other tweeter sound emission section 60a surrounded by a dashed line. Also, if the angle θ1 between one main sound emission direction X1 and the other main sound emission direction X2 in the left-right direction is smaller than 60°, the range in which the sound range S1 in the main sound emission direction X1 from one tweeter sound emission section 60a and the sound range S2 in the main sound emission direction X2 from the other tweeter sound emission section 60a overlap increases, and it may be difficult to spread widely in the left-right direction. The pair of tweeters 60 are set so that the angle θ2 that one main sound emission direction X1 makes with respect to the front elevation angle Y is equal to the angle θ3 that the other main sound emission direction X2 makes with respect to the front elevation angle Y. For this reason, the main sound emission direction X of the inner tweeter 60 of the pair of tweeters 60 is directed toward the center (toward the performer) in the left-right direction of the main body case 30, while the main sound emission direction X of the outer tweeter 60 is directed toward the outside (away from the performer) in the left-right direction of the main body case 30.

[0031] 6, the pair of tweeters 60 attached to one third sheet metal member 19 are provided with a slight inclination upward so that the sound emission directions in the vertical direction are both directed toward the perforated member 40 (the gap between the display panel 18 and the front top plate 36F). Specifically, as shown in Fig. 7 and Fig. 8, in each of the pair of tweeters 60, the main sound emission directions X1, X2, which are directions inclined at angles θ2, θ3 in the left-right direction with respect to the front elevation angle direction Y of the elevation angle θ4, are provided in a shape inclined upward so that the angles formed by the directions inclined at angles θ2, θ3 in the left-right direction as viewed from above and the angles of the elevation angle in the vertical direction with respect to the horizontal axis directions Z1, Z2 of 0°, that is, the elevation angle θ4, are within a range of 10° to 30°, more preferably within a range of 18° to 22°. Openings 16b are provided in the second sheet metal member 16 in a portion located in front of the right tweeter pair 60 and in a portion located in front of the left tweeter pair 60. Each hole 40a provided in the perforated member 40 is provided so that the inclination angle in the vertical direction is the same as or close to the inclination angle θ4 of the elevation angle of each tweeter 60 in the vertical direction.

[0032] Next, referring to Figures 4 and 6, a method of transmission of sound emitted from each tweeter 60 will be described. The sound emitted from each tweeter 60 travels toward the perforated member 40, passes through each hole 40a of the perforated member 40, and travels toward the outside of the main body case 30 through the gap between the display panel 18 and the front side top plate 36F. At this time, since the inclination angle of each hole 40a in the vertical direction (the inclination angle of the inner wall surrounding each hole 40a) is the same as or close to the inclination angle θ4 of each tweeter 60 in the vertical direction, the sound emitted from each tweeter 60 easily travels through the perforated member 40 and reaches the gap between the display panel 18 and the front side top plate 36F.

[0033] Of the sounds directed to the outside of the main body case 30, sounds emitted toward the center in the left-right direction of the main body case 30 (sound emitted from one tweeter 60 of the right tweeter pair 60 in the main sound emission direction X1 and sound emitted from one tweeter 60 of the left tweeter pair 60 in the main sound emission direction X2) are likely to reach the ears of the performer directly because the sound emission directions of the tweeters 60 are tilted slightly upward. On the other hand, of the sounds directed to the outside of the main body case 30, sounds emitted to the outside in the left-right direction of the main body case 30 (sound emitted from the other tweeter 60 of the right tweeter pair 60 in the main sound emission direction X2 and sound emitted from the other tweeter 60 of the left tweeter pair 60 in the main sound emission direction X1) are reflected, for example, by the wall of the room in which the electronic keyboard instrument 1 is placed, and reach the ears of the performer as indirect sounds, making the sound more realistic for the performer.

[0034] In this embodiment, the pair of tweeters 60 attached to one third sheet metal member 19 are arranged close to each other in the left-right direction, but the pair of tweeters 60 are provided at different angles to the left-right direction so that the sound emission directions of the pair of tweeters 60 spread out toward the front side, so that sound interference (interference between sound waves emitted from one tweeter 60 and sound waves emitted from the other tweeter 60) is unlikely to occur between the pair of tweeters 60. Therefore, the sounds emitted from the tweeters 60 reach the performer's ears with sound interference suppressed.

[0035] Next, the configuration of each member provided in the front space FS will be described. As shown in Fig. 6, a first support member 80 is provided on the front side of the first sheet metal member 13 in the front space FS. The first support member 80 is provided over substantially the entire area below the keyboard 20, and has a horizontally elongated shape similar to the keyboard 20 (see Fig. 2). The first support member 80 is a hollow member that is open downward. The keyboard 20 is supported by the main body case 30 by the first support member 80 and a second support member 88, which will be described later. The second sheet metal member 16 described above is provided on the rear side of the first support member 80.

[0036] The front end of the first support member 80 is a convex portion 80a that protrudes upward. The portion of the first support member 80 that is located below the black key 22B of each key 22 is a platform portion 80b that protrudes upward. Between the convex portion 80a and the platform portion 80b is a concave portion 80c that is concave downward. A pivot point portion 80b1 that supports the rear end portion of each key 22 of the keyboard 20 in a freely rotatable manner is provided at the rear portion of the upper surface of the platform portion 80b. In addition, a control board 85 is provided on the upper surface of the platform portion 80b. The control board 85 is provided with a switch that detects the pressed key 22 and outputs a detection signal for generating a corresponding sound. The concave portion 80c is provided with a plurality of concave portion openings 80d that open in the front-rear and up-down directions, lined up in the left-right direction (see FIG. 4).

[0037] A plurality of hammer members 84 are provided below the base portion 80b in the space inside the first support member 80, and are connected to the respective keys 22. The hammer members 84 each include a substantially triangular weight portion 84a and an arm portion 84b that extends linearly forward from the weight portion 84a. The arm portion 84b is rotatably supported by a pivot member 86 provided on the front portion of the inside of the base portion 80b. When each key 22 is struck, the weight portion 84a of the hammer members 84 rises, and weight can be applied to each key 22 when it is struck. This provides a striking sensation similar to that of a real piano.

[0038] A second support member 88 arranged on the bottom plate 37 is provided in a portion of the space inside the first support member 80 that is forward of the portion where the hammer member 84 is arranged. The second support member 88 is a hollow member that opens downward, and is attached to the main body case 30 by being screwed to the bottom plate 37. The second support member 88 indirectly supports the keyboard 20 via the first support member 80 with respect to the main body case 30, which is made of wood. A pivot member 86 that supports the arm portion 84b of the hammer member 84 is provided on the second support member 88.

[0039] Next, the communication paths P1 to P4 provided inside the main body case 30 and serving as sound emission paths for the sounds emitted from the speakers 50R and 50L will be described. As shown in Fig. 6, in the electronic keyboard instrument 1 of this embodiment, four communication paths P1 to P4 are provided inside the main body case 30 as sound emission paths for the sounds emitted from the speakers 50R and 50L to the outside of the main body case 30. The first communication path P1 is a communication path that runs from each speaker 50R or 50L to the front space FS via a gap provided between the lower panel 37 and the rear mounting member 15, passes below each hammer member 84, passes through the recessed portion opening 80d to the upper side of the first support member 80, and reaches the outside of the main body case 30 from between each key 22.

[0040] The second communication path P2 is a communication path that extends from each speaker 50R, 50L through a gap between the lower panel 37 and the rear mounting member 15 to the rear side of the first sheet metal member 13, passes through the rear side of the first sheet metal member 13 upward, and reaches the outside of the main body case 30 through the mounting opening 14a. The third communication path P3 is a communication path that extends from each speaker 50R, 50L upward through the rear space BS, passes through the hole 40a provided in the perforated member 40, and reaches the outside of the main body case 30 through the gap G between the display panel 18 and the front top plate 36F. Therefore, the sound emitted from each tweeter 60 travels toward the outside of the main body case 30 through a part of the third communication path P3. The fourth communication passage P4, which is the fourth communication passage, is a communication passage that passes upward from each of the speakers 50R, 50L through the rear space BS and reaches the outside of the main body case 30 through the upper opening 11a of the cover plate 11. Since each of the tweeters 60 is attached from above by the third sheet metal member 19, there is no need to provide an attachment mechanism below each of the tweeters 60, and therefore loss of sound emitted from each of the speakers 50R, 50L through the third communication passage P3 can be kept low.

[0041] As described above, the electronic keyboard instrument 1 according to this embodiment includes the main body case 30, the right tweeter pair 60 provided on the right side of the main body case 30 and having a plurality of sound emitting members whose main sound emitting directions are different from each other, and the left tweeter pair 60 provided on the left side of the main body case 30 and having a plurality of sound emitting members whose main sound emitting directions are different from each other. Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the right tweeter pair 60 and the left tweeter pair 60 are each provided at a different angle to the left and right direction so that the sound emitting directions of each of them spread out toward the front side.

[0042] In the electronic keyboard instrument 1 of the present embodiment configured as described above, for each of the right tweeter pair 60 and the left tweeter pair 60, sound interference between the pair of tweeters 60 is suppressed, and the sound emitted from each tweeter 60 can be effectively delivered to the player. This improves the acoustic effect of the electronic keyboard instrument 1.

[0043] In the electronic keyboard instrument 1 according to this embodiment, each of the right tweeter pair 60 and the left tweeter pair 60 is provided with one sound emission direction facing the outside of the main body case 30 in the left-right direction, and the other sound emission direction facing the center of the main body case 30 in the left-right direction. With this configuration, the sound emitted from one side of the pair of tweeters 60 can be a direct sound that reaches the performer directly, and the sound emitted from the other side can be an indirect sound to the performer, etc., so that the acoustic effect of the electronic keyboard instrument 1 can be further improved.

[0044] In the electronic keyboard instrument 1 according to this embodiment, each of the right tweeter pair 60 and the left tweeter pair 60 is provided such that the angle between one main sound emission direction and the other main sound emission direction in the left-right direction is smaller than 90° and larger than 60°. If the angle is larger than 90°, a sufficient volume cannot be ensured between the pair of tweeters 60, and if it is smaller than 60°, sound interference cannot be sufficiently suppressed between the pair of tweeters 60. According to the above configuration, it is possible to provide a specific sound emission angle in the left-right direction for the pair of tweeters 60 that can suppress sound interference while ensuring a sufficient volume.

[0045] In the electronic keyboard instrument 1 according to this embodiment, the right tweeter pair 60 and the left tweeter pair 60 are each provided with an upward inclination in the up-down direction. With this configuration, the sound emission direction of the pair of tweeters 60 is directed toward the height of the player's ears, so that the sound emitted from the pair of tweeters 60 can be effectively directed toward the player.

[0046] In the electronic keyboard instrument 1 according to this embodiment, each of the right tweeter pair 60 and the left tweeter pair 60 is provided inclined upward so that the angle of the sound emission direction in the vertical direction with respect to the front-rear direction of the main body case 30 is within a range of 10° to 30°. With this configuration, it is possible to provide a specific sound emission angle in the vertical direction for the pair of tweeters 60 so that the sound emission direction of the pair of tweeters 60 is directed to the height of the player's ears.

[0047] In the electronic keyboard instrument 1 according to this embodiment, the speakers 50R, 50L include a left speaker pair 50L provided on the left side in the left-right direction in the main body case 30 and emitting mainly low and mid-range sounds, and a pair of right speaker pairs 50R provided on the other side in the left-right direction in the main body case 30 and emitting high-pitched sounds, and each tweeter 60 is provided in a pair above the left speaker pair 50L and a pair above the right speaker pair 50R. With this configuration, the sound emitted from the left speaker pair 50L and the sound emitted from the left tweeter pair 60 can be combined on the left side of the main body case 30 (so that they can be heard at the same generating location), and the sound emitted from the right speaker pair 50R and the sound emitted from the right tweeter pair 60 can be combined on the right side of the main body case 30, thereby improving the acoustic effect of the electronic keyboard instrument 1.

[0048] In the electronic keyboard instrument 1 according to this embodiment, the left-right spacing W2 of the left tweeter pair 60 is smaller than the left-right spacing W1L of the left speaker pair 50L, and the right-right spacing W2 of the right tweeter pair 60 is smaller than the left-right spacing W1R of the right speaker pair 50R. With this configuration, the sounds emitted from each tweeter 60 of the left tweeter pair 60 can be heard as if they were radially diffused from the same source, and the sounds emitted from each tweeter 60 of the right tweeter pair 60 can be heard as natural sounds.

[0049] In the electronic keyboard instrument 1 according to this embodiment, the left tweeter pair 60 is provided above the left speaker pair 50L so as to be within the range of the left-right spacing W1L between the left speaker pair 50L, and the right tweeter pair 60 is provided above the right speaker pair 50R so as to be within the range of the left-right spacing W1R between the right speaker pair 50R. With this configuration, the high-pitched sound emitted from the left tweeter pair 60 and the high-pitched sound emitted from the left speaker pair 50L can be heard naturally and without discomfort at the same generating location, and the mainly high-pitched sound emitted from the right tweeter pair 60 can be heard naturally and without discomfort at the same generating location as the high-pitched sound emitted from the right speaker pair 50R.

[0050] In the electronic keyboard instrument 1 according to this embodiment, the center position of the left tweeter pair 60 in the left-right direction is closer to the center in the left-right direction of the main body case 30 than the center position of the left speaker pair 50L in the left-right direction, and the center position of the right tweeter pair 60 in the left-right direction is closer to the center in the left-right direction of the main body case 30 than the center position of the right speaker pair 50R in the left-right direction. With this configuration, the left tweeter pair 60 and the right tweeter pair 60 are positioned closer to the center in the left-right direction of the main body case 30, i.e., closer to the player, so that the sound emitted from each tweeter 60 can easily reach the player's ears.

[0051] In the electronic keyboard instrument 1 according to this embodiment, the left tweeter pair 60 and the right tweeter pair 60 are each attached to the main body case 30 via one third sheet metal member 19. With this configuration, the member for attaching the left tweeter pair 60 to the main body case 30 and the member for attaching the right tweeter pair 60 to the main body case 30 can be made common, so that the manufacturing process for the electronic keyboard instrument 1 can be simplified and manufacturing costs can be reduced.

[0052] In the electronic keyboard instrument 1 according to this embodiment, each of the left tweeter pair 60 and the right tweeter pair 60 is attached to the third sheet metal member 19 on both sides in the left-right direction. If both sides in the up-down direction of each tweeter 60 are attached to the third sheet metal member 19, there is a risk that both the top and bottom sides collide with the front top plate 36F (second sheet metal member 16) or the display board 18, which may restrict the arrangement of the tweeter 60 in the up-down direction, and there is a risk that the loss of the sound emitted from each speaker 50R, 50L through the third communication passage P3 may become large. In contrast, according to the configuration of this embodiment, the arrangement of each tweeter 60 in the up-down direction is not restricted, and it is possible to provide the tweeter 60 in the main body case 30, and the sound from the speakers 50R, 50L can be emitted to the outside satisfactorily. In the present embodiment, an electronic musical instrument has been described as an example, but the present invention is not limited to this and can also be applied to other audio equipment such as a stereo system other than musical instruments.

[0053] In this disclosure, the term "at least" includes multiple combinations or numbers greater than the number indicated, unless otherwise specified, such as "at least one of A, B, and C" meaning "(A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C)". Also, for example, if C is multiple, the phrase "at least one of A, B, and C" means "(A), (B), (at least one or more C), (A and B), (A and at least one or more C), (B and at least one or more C), or (A, B, and at least one or more C)". A multiple A or a multiple B are also interpreted as being treated in the same manner as above.

[0054] In this disclosure, the term "or" is used to refer to non-exclusives unless otherwise stated, for example, the phrase "A or B" means "any of (A but not B), (B but not A), and (A and B)."

[0055] In this disclosure, terms such as "first," "second," and "third," unless otherwise specified, are applied merely for convenience in description and to distinguish one from another, and do not imply any other kind of ordering of the numerical values ​​(e.g., spatial, temporal, logical, etc.).

[0056] In this disclosure, the terms "one" and "the other" refer to different things; however, unless otherwise specified, a "one" described earlier and a "one" described later do not necessarily refer to the same thing, and similarly, a "other" described earlier and a "other" described later do not necessarily refer to the same thing.

[0057] 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. [Explanation of symbols]

[0058] 1 Electronic keyboard instrument 10 Main unit 11 Cover plate 11a Upper opening 12 console member 13 first sheet metal member 14 Front mounting member 14a Mounting opening 15 rear mounting member 16 second sheet metal member 16a Step 16b Opening 18 Display plate 19 Third sheet metal member 19a Fixing part 19b Mounting part 20 keys 22 keys 22B black key 22W white key 24 Volume panel section 24a Volume knob 26 Setting panel section 26a Setting button 30 Main body case 32 Front panel 32a Power button 33 Rear panel 34 Left side plate 35 Right side plate 36B Rear top plate 36F Front top plate 36F1 Music stand 37 Bottom panel 38 Key cover 38a Front cover part 38b rear cover portion 40 perforated member 40a hole 50L Left speaker pair 50L1 Speaker sound output section 50R Right speaker pair 50R1 Speaker sound output section 60 Tweeter 60a Tweeter sound output section 61 Tweeter body 62 protruding portion 80 first support member 80a Convex part 80b Trapezoid part 80b1 Rotation fulcrum part 80c Concave part 80d Concave opening 84 Hammer member 84a Weight part 84b Arm part 85 Control board 86 Axle support member 88 Second support member 100 Leg 110 side plate member 120 pedal frame 130 Pedal device BL rear link member BS Rear space C1L Center position C1L Center position C2 Center position FL Front link member FS Front space H1 Screw hole H2 Screw hole P1 1st communication passage P2 2nd communication passage P3 3rd communication passage P4 4th communication passage θ1~θ4 angle

Claims

1. The housing and a first sound emitting section provided on one side in the left-right direction of the housing and having a plurality of sound emitting members whose main sound emitting directions are different from each other; a second sound emitting section provided on the other side in the left-right direction of the housing and having a plurality of sound emitting members whose main sound emitting directions are different from each other; Equipped with electronic equipment.

2. Each of the plurality of sound emitting members of at least one of the first sound emitting section and the second sound emitting section is provided such that its respective main sound emitting direction forms a different angle with respect to the left-right direction. The electronic device according to claim 1 .

3. the plurality of sound emitting members of the first sound emitting unit are a pair of sound emitting members, the plurality of sound emitting members of the second sound emitting unit are a pair of sound emitting members, Each of the pair of sound emitting members of at least one of the first sound emitting unit and the second sound emitting unit is provided so that a main sound emitting direction of one sound emitting member is directed toward a center of the housing in the left-right direction, and a main sound emitting direction of the other sound emitting member is directed toward an outside of the housing in the left-right direction. The electronic device according to claim 1 .

4. the plurality of sound emitting members of the first sound emitting unit are a pair of sound emitting members, the plurality of sound emitting members of the second sound emitting unit are a pair of sound emitting members, each of the pair of sound emitting members of at least one of the first sound emitting unit and the second sound emitting unit is provided such that an angle formed between a main sound emitting direction of one sound emitting member and a main sound emitting direction of the other sound emitting member in the left-right direction is smaller than 90° and larger than 60°; The electronic device according to claim 1 .

5. Each of the plurality of sound emitting members of at least one of the first sound emitting section and the second sound emitting section is provided in a shape inclined upward in the up-down direction. The electronic device according to claim 1 .

6. the plurality of sound emitting members of the first sound emitting unit are a pair of sound emitting members, the plurality of sound emitting members of the second sound emitting unit are a pair of sound emitting members, Each of the pair of sound emitting members of at least one of the first sound emitting unit and the second sound emitting unit is provided in a shape inclined upward so that the angle of the sound emitting direction relative to the front-rear direction of the housing in the vertical direction is within a range of 10° to 30°. The electronic device according to claim 1 .

7. Further provided is a third sound emitting section that emits low-frequency sounds from at least one of the first sound emitting section and the second sound emitting section. The electronic device according to claim 1 .

8. the third sound emitting section includes a pair of sound emitting members provided on one side in the left-right direction, and a pair of sound emitting members provided on the other side in the left-right direction within the housing, 8. The electronic device according to claim 7.

9. the plurality of sound emitting members of the first sound emitting unit are a pair of sound emitting members, the plurality of sound emitting members of the second sound emitting unit are a pair of sound emitting members, a distance in the left-right direction between the pair of sound emitting members of at least one of the first sound emitting unit and the second sound emitting unit is smaller than at least one of the distance in the left-right direction between the pair of sound emitting members provided on one side in the left-right direction and the distance in the left-right direction between the pair of sound emitting members provided on the other side in the left-right direction; 9. The electronic device according to claim 8.

10. one of the first sound emitting unit and the second sound emitting unit is located between one position and the other position of the pair of sound emitting members provided on one side in the left-right direction, as viewed from above; the other of the first sound emitting portion and the second sound emitting portion is located between one position and the other position of the pair of sound emitting members provided on the other side in the left-right direction, as viewed from above.

9. The electronic device according to claim 8.

11. At least one of a central position in the left-right direction of the first sound emitting section and a central position in the left-right direction of the second sound emitting section is located closer to the center in the left-right direction of the housing than at least one of a central position of the pair of sound emitting members provided on one side in the left-right direction and a central position of the pair of sound emitting members provided on the other side in the left-right direction.

9. The electronic device according to claim 8.

12. the first sound emitting unit and the second sound emitting unit are attached to the housing via different attachment members, The electronic device according to any one of claims 1 to 11.

13. the plurality of sound emitting members of the first sound emitting unit are individually attached to one attachment member, the plurality of sound emitting members of the second sound emitting unit are individually attached to one attachment member different from the attachment member; The electronic device according to claim 12.

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