Electronic keyboard instruments

Abstract

To provide an electronic musical instrument and an electronic keyboard musical instrument that can improve the feeling of uniformity of sounds that reach a player.SOLUTION: An electronic keyboard musical instrument comprises: a body case 30; a keyboard 20 that is provided in the body case 30 and has a plurality of keys 22 arranged in the left-and-right direction of the body case 30; speakers 50R, 50L that include a left speaker 50L provided at one end in the left-and-right direction in the body case 30 and emitting low note sounds, and a right speaker 50R provided at the other end in the left-and-right direction in the body case 30 and emitting high note sounds; and reflecting members 60 that each have a reflecting plate 64a reflecting sounds and are provided between the left speaker 50L and the right speaker 50R in the body case 30. The reflecting members 60 are each provided such that the reflecting plate 64a is inclined toward the right speaker 50R with respect to the left-and-right direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention , electric Concerning small keyboard instruments. [Background technology]

[0002] Conventionally, electronic musical instruments have been known that can provide keystroke sensations and tones similar to those of a real piano. For example, Patent Document 1 discloses an electronic organ (electronic musical instrument) that includes an organ body, a keyboard, and a speaker housed in the organ body, and generates electronic sounds in response to key depressions on the keyboard. In this electronic organ, a reflector is provided on the sound-emitting side of the speaker, and by reflecting the sound emitted from the sound-emitting surface of the speaker with the reflector, listeners can hear better performance sounds, including high-pitched sounds. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-302974 Summary of the Invention [Problem to be solved by the invention]

[0004] There are cases where it is desirable to project sound from the speaker from inside the housing toward the performer's head, allowing the performer to obtain a good sound image. However, in the electronic organ disclosed in Patent Document 1, the speaker is mounted with its sound-emitting surface facing downward, and the sound emitted from the speaker is emitted from below the organ body to the outside and toward the reflector, so the sound emitted from the speaker and reflected by the reflector cannot be delivered effectively toward the performer, and there is a risk that the uniformity of the sound reaching the performer will be reduced.

[0005] This invention can improve the uniformity of the sound that reaches the performer. Electricity To provide a small keyboard instrument. [Means for solving the problem]

[0006] The electron keyboard The instrument includes a housing and a the front side of and a plurality of Keyboard with keys and a sound emitting member including a bass sound emitting member provided on one side in the left-right direction within the housing and emitting bass sounds, and a treble sound emitting member provided on the other side in the left-right direction within the housing and emitting treble sounds; and a reflective member having a reflective surface that reflects sound and provided between the bass sound emitting member and the treble sound emitting member within the housing, wherein the reflective member is so that the sound emitted from the high-pitched sound-emitting member is reflected by the reflection surface toward the front side of the housing and toward the center side in the left-right direction, The reflecting surface is provided so as to be inclined toward the high-frequency sound emitting member with respect to the left-right direction. [Effects of the Invention]

[0008] According to the present invention, it is possible to improve the uniformity of the sound that reaches the performer. Electricity A keyboard instrument can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an overall perspective view of an electronic keyboard instrument according to a first embodiment, as seen from the front side. [Figure 2] 1 is a perspective view of a main body of an electronic keyboard instrument according to a first embodiment, seen from the rear side. [Figure 3] 1 is a perspective view of a main body of an electronic keyboard instrument according to a first embodiment, seen from the front side, with a front top panel and a rear top panel removed. FIG. [Figure 4] 4 is a cross-sectional view of the main body of the electronic keyboard instrument according to the first embodiment, taken along the line IV-IV in FIG. 2. FIG. [Figure 5] 5 is a perspective cross-sectional view of the main body of the electronic keyboard instrument according to the first embodiment, the perspective cross-sectional view corresponding to the cross-sectional view of FIG. 4. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described with reference to the drawings. An electronic keyboard instrument (electronic musical instrument) 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 keying portions exposed, and a main body case (housing) 30 that surrounds and holds the keyboard 20. The leg 100 includes a pair of side panel members 110, a pedal frame 120, and a pedal device 130. In the following description, the arrangement direction of the plurality of keys 22 on the keyboard 20 is defined as the left-right direction (the left side of FIG. 1 is defined as the leftward direction), the extension direction of each key 22 is defined as the front-rear direction (the front side of FIG. 1 is defined as the frontward direction), and the up-down direction of the electronic keyboard instrument 1 is defined as the up-down direction (the upper side of FIG. 1 is defined as the upward direction).

[0011] As shown in FIG. 1 , a 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 their plate surfaces facing left and right, and support 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 approximately the 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 that is exposed to the outside and each side plate member 110 of the leg 100 are both made of wood, giving them a distinctive texture. The configuration of the main body 10 will be described in detail below.

[0012] As shown in FIGS. 1 to 4, the main body case 30 has a horizontally elongated, generally rectangular shape with the left-right direction as viewed from above and below. It includes thick plate-like members: 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 lower panel (bottom panel) 37, and has a generally L-shaped vertical cross section (see FIG. 4). Note that FIG. 2 shows the main body case 30 with the rear panel 33 removed, and FIG. 3 shows the main body case 30 with the front top panel 36F and rear top panel 36B removed. The front panel 32 has a generally rectangular shape that is elongated in the left-right direction and is located at the lower portion of the front end of the main body 10 and below the keyboard 20, constituting the front surface of the main body case 30. A power button 32a 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 elongated in the left-right direction and is located at the rear of the main body 10, constituting the rear surface of the main body case 30.

[0013] The left side panel 34 and the right side panel 35 are both generally rectangular and elongated in the front-to-rear direction, with a step provided in the approximate center in the front-to-rear direction so that the front side is at approximately the same height as the keyboard 20. The left side panel 34 and the right side panel 35 are respectively provided on the left and right sides of the main body 10, constituting the left and right sides of the main body case 30. The front top panel 36F is generally rectangular and elongated in the left-to-right direction, and is provided on the front side of the upper rear portion of the main body 10, constituting a portion of the top surface of the main body case 30. The rear top panel 36B is generally rectangular and elongated in the left-to-right direction, and is provided on the rear side of the upper rear portion of the main body 10, constituting a portion of the top surface of the main body case 30. As shown in FIGS. 1 and 3 , a volume panel 24, on which a volume knob 24a and other controls are arranged, is provided between the keyboard 20 and the right side panel 35. In addition, a setting panel 26, on which various setting buttons 26a and other controls are arranged, is provided between the keyboard 20 and the left side panel 34.

[0014] As shown in FIGS. 1 and 4, the rear top panel 36B is rotatably attached to the rear panel 33 so that the front side opens. A cover panel 11, which is a generally rectangular plate elongated in the left-right direction, is provided below the rear top panel 36B with both plate surfaces facing up and down. The cover panel 11 has a plurality of generally rectangular upper openings 11a that open upward at intervals in the left-right direction (see FIG. 4). The top and side surfaces of the cover panel 11 are covered with a saran net. When the rear top panel 36B is open, the cover panel 11 covers the lower openings of the rear top panel 36B, preventing the interior of the main body case 30 from being seen. A music stand 36F1 is attached to the front top panel 36F approximately in the left-right center. The lower panel 37, which is generally rectangular elongated in the left-right direction and is provided below the main body 10, forms the lower surface of the main body case 30.

[0015] 3 and 4, a console member 12, which is a generally rectangular plate elongated 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 overlap the front end of the front top panel 36F in the up-down direction and cover the rear ends of each key 22 of the keyboard 20. The console member 12 prevents the interior 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. Furthermore, by providing the console member 12 behind each key 22, movement of each key 22 in the front-to-rear direction is restricted.

[0016] As shown in FIG. 4 , a plurality of first sheet metal members 13, each having a generally plate shape and extending downward with both plate surfaces facing the front-rear direction, are provided at intervals in the left-right direction at the rear end of the underside of the console member 12. The lower ends of the first sheet metal members 13 are attached to the lower panel 37. The rear side of the keyboard 20 is fixed to the main body case 30 by the first sheet metal members 13. The space in front of the first sheet metal members 13 is a space provided below the keyboard 20. The lower end of the first sheet metal members 13 is provided with a plurality of notches (not shown). The spaces in front of and behind the first sheet metal members 13 inside the main body case 30 are connected by the spaces between the plurality of first sheet metal members 13 and the notches provided in the first sheet metal members 13.

[0017] As shown in FIG. 3, the main body case 30 has an opening at the upper front between the front panel 32 and the console member 12, and a portion of the top surface, which is the striking surface of each key 22 of the keyboard 20, and a portion of the front surface are exposed to the outside through this opening. As shown in FIGS. 3 and 4, the main body 10 is provided with a key cover 38 that covers the exposed portion of the keyboard 20. The key cover 38 is a thick plate-like member, and is configured with a front cover portion 38a and a rear cover portion 38b, which are substantially rectangular plate-like members elongated in the left-right direction, arranged side by side from front to back. The front cover portion 38a is rotatably connected to a front link member FL fixed to the main body case 30 via a horizontally elongated front mounting member 14. Two horizontally elongated, substantially rectangular mounting openings 14a that open through the front mounting member 14 are provided on both left and right sides of a portion of the front mounting member 14 near the center (the handle portion) (see FIG. 3).

[0018] The rear cover portion 38b is rotatably connected to a 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 foldably connected in two 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 the gap between the console member 12 and an operation plate 18 (described later). When the power is turned off in the electronic keyboard instrument 1, 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, thereby covering the exposed portion of the keyboard 20.

[0019] 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 operation plate 18 is covered by the rear attachment member 15. Furthermore, when the power is turned on and the key cover 38 is stored in the space behind the first sheet metal member 13, a small gap (hereinafter referred to as a "communication gap G1" (see FIG. 5)) is created between the lower panel 37 and the rear attachment member 15. Therefore, when the key cover 38 is stored, the interior of the main body case 30 is divided into a front space FS provided in front of the key cover 38 and a rear space BS provided behind the key cover 38.

[0020] As shown in FIGS. 3 and 5, a second sheet metal member 16 extending in the left-right direction is attached to the underside of the front top panel 36F (not shown in FIG. 3). An operation plate 18, which is a substantially rectangular, thick plate elongated in the left-right direction, is provided at the front end of the second sheet metal member 16 with both plate surfaces facing the front-rear direction. The operation plate 18 is provided between the key cover 38 and the front top panel 36F with gaps opening to the front on both the top and bottom sides. The operation plate 18 covers most of the space between the key cover 38 and the front top panel 36F, preventing the rear space BS from being seen. A portion of the front surface of the operation plate 18 is a touch panel, and multiple switches (not shown) that accept touch operations are provided thereon. Therefore, the operation plate 18 has an internal touch operation detection mechanism for performing touch operations and an LED illumination mechanism for illuminating the switches.

[0021] A perforated member 40, which is a generally rectangular plate that is elongated in the left-right direction, is attached to the front side of the second sheet metal member 16 by screws with both plate surfaces facing the front-rear direction. The perforated member 40 is made of resin and formed by injection molding, and has a plurality of holes that penetrate through it in the thickness direction. The perforated member 40 is also attached to the second sheet metal member 16 behind the operation plate 18, with a small gap between it and the operation plate 18 in the front-rear direction. As shown in FIG. 4 , the lower portion of the perforated member 40 overlaps with the operation plate 18 in the front-rear direction.

[0022] 2 and 3, the electronic keyboard instrument 1 is provided with two speakers 50R, 50L on the rear side of the upper surface of the lower panel 37 in the rear space BS. Both speakers 50R, 50L are provided below and rearward of the keyboard 20, with their sound emitting sections 50R1, 50L1, each having a substantially truncated cone shape, positioned above the lower panel 37. Sound from each sound emitting section 50R1, 50L1 is emitted into the rear space BS. One speaker 50R (hereinafter also referred to as the "right speaker (treble sound emitting member) 50R") is provided on the right side of the upper surface of the lower panel 37 and is capable of emitting high-pitched sounds. The other speaker 50L (hereinafter also referred to as the "left speaker (low-frequency sound-emitting member) 50L") is arranged in parallel with the right speaker 50R in the left-right direction, on the left side of the upper surface of the lower panel 37, and is capable of emitting low-frequency sound.

[0023] Between the two speakers 50R, 50L and at a position near the center in the left-right direction on the rear side of the upper surface of the bottom panel 37, two reflective members 60 that mainly reflect sound emitted from the right speaker 50R are provided side by side in the left-right direction. That is, each speaker 50R, 50L is provided at both ends in the left-right direction within the main body case 30, and each reflective member 60 is provided near the center in the left-right direction within the main body case 30. Each reflective member 60 has a thick plate-shaped screw-fastened portion 62 that is attached to the upper surface of the bottom panel 37 by screws, and a thick plate-shaped rising portion 64 that rises from one end of the screw-fastened portion 62 approximately perpendicular to the bottom panel 37, and is made of polystyrene foam, foam polypropylene, or the like.

[0024] Each reflecting member 60 is disposed such that both plate surfaces of the raised portion 64 are slightly tilted toward the right speaker 50R in the left-right direction. The surface of the raised portion 64 of each reflecting member 60 facing forward serves as a reflecting surface 64a that reflects sound. That is, each reflecting member 60 is disposed such that the normal direction of the reflecting surface 64a faces toward the right speaker 50R. Specifically, each reflecting member 60 is disposed such that the normal direction of the reflecting surface 64a is tilted toward the right speaker 50R by approximately 35° in the left-right direction.

[0025] In this embodiment, because the reflecting surfaces 64a are inclined toward the right speaker 50R, at least a portion of the sound emitted from the right speaker 50R is reflected by each reflecting surface 64a toward the front and approximately the center in the left-right direction. Also, as shown in FIG. 5, a communication gap G1 connects the front side of the reflecting surfaces 64a to the lower side of the keyboard 20 (front space FS). The height dimension H1 of each reflecting surface 64a is approximately equal to the height dimension of each speaker 50R, 50L and is larger than the height dimension H2 of the communication gap G1. Therefore, high-pitched sounds emitted from the right speaker 50R and reflected by each reflecting surface 64a are more likely to reach the lower side of the keyboard 20 through the communication gap G1.

[0026] As shown in Fig. 5, a substantially rectangular saran net 66 is provided above each reflecting member 60 in the rear space BS. The left-right dimension of the saran net 66 is substantially equal to the left-right dimension of the rear space BS, and the front-rear dimension is longer than the distance between the key cover 38 and the rear panel 33. The saran net 66 is curved so as to form a convex arc shape obliquely downward toward the rear, with its rear end fixed to the rear panel 33 and its front portion bent downward at a substantially right angle and fixed to the bottom panel 37. The saran net 66 covers the speakers 50R, 50L and the reflecting members 60 from above, thereby preventing the speakers 50R, 50L and the reflecting members 60 from being seen through gaps between the operation panel 18 and the front top panel 36F, for example.

[0027] As shown in FIG. 3 , tweeters 70R and 70L are provided in the rear space BS at positions diagonally above and forward of the speakers 50R and 50L, respectively. Each tweeter 70R and 70L is generally cylindrical and attached to the inner surface of the second sheet metal member 16 with its column axis and sound emission direction facing diagonally upward and forward. Hereinafter, the tweeter 70R provided on the right end of the rear space BS will be referred to as the “right tweeter 70R,” and the tweeter 70L provided on the left end of the rear space BS will be referred to as the “left tweeter 70L.” The right tweeter 70R and the left tweeter 70L are provided above the keyboard 20, facing the right and left ends of the perforated member 40, respectively, with a gap between them. Sound emitted from each tweeter 70R and 70R reaches the perforated member 40.

[0028] Next, the configuration of each member provided in the front space FS will be described. As shown in Fig. 4, a first support member 80 is provided in front of the first sheet metal member 13 in the front space FS. The first support member 80 is provided across substantially the entire area below the keyboard 20, and has a horizontally elongated shape similar to the keyboard 20. 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 behind the first support member 80.

[0029] The front end of the first support member 80 forms a convex portion 80a that protrudes upward. The portion of the first support member 80 located below the black key 22B of each key 22 forms a platform portion 80b that protrudes upward like a platform. Between the convex portion 80a and the platform portion 80b, a concave portion 80c is formed, which is concave downward. The rear portion of the top surface of the platform portion 80b is provided with a pivot point portion 80b1 that rotatably supports the rear end of each key 22 on the keyboard 20. A control board 85 is also provided on the top surface of the platform portion 80b. The control board 85 is provided with a switch that generates a sound corresponding to the depressed key 22. The concave portion 80c has multiple platform openings 80d that open in the front-to-rear and up-down directions and are aligned in the left-to-right direction (see FIG. 3).

[0030] A plurality of hammer members 84, which are connected to the respective keys 22, are provided in the space inside the first support member 80 below the base portion 80b. Each hammer member 84 includes 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 support member 86 provided on the front portion of the inside of the base portion 80b. When a key 22 is struck, the weight portion 84a of each hammer member 84 rises, imparting weight to each key 22 when struck. This provides a keystroke sensation similar to that of a real piano.

[0031] A second support member 88, which is disposed 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 members 84 are disposed. The second support member 88 is a hollow member that opens downward, and is attached to the main 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 case 30, which is made of wood. A pivot support member 86 that supports the arm portion 84b of the hammer member 84 is provided on the second support member 88.

[0032] Next, we will explain the communication paths P1 to P4 that are provided inside the main body case 30 and serve as sound emission paths for sounds emitted from the speakers 50R, 50L. As shown in Figure 4, the electronic keyboard instrument 1 of this embodiment has four communication paths P1 to P4 provided inside the main body case 30, which are sound emission paths for sounds emitted from the speakers 50R, 50L to reach the outside of the main body case 30. The first communication path P1 is a communication path that runs from each speaker 50R, 50L through the communication gap G1 to the front space FS, passes below each hammer member 84, passes through the recessed portion openings 80d to the upper side of the first support member 80, and then runs between each key 22 to the outside of the main body case 30.

[0033] The second communication path P2 extends from each speaker 50R, 50L through the communication gap G1 to the rear side of the first sheet metal member 13, passes through the rear side of the first sheet metal member 13, and exits upward through the mounting opening 14a to the outside of the main body case 30. High-frequency sounds have a higher vibration frequency in the air than low-frequency sounds and are more easily attenuated. Therefore, high-frequency sounds emitted from the right speaker 50R are less likely to reach the front side of the main body case than low-frequency sounds emitted from the left speaker 50L. In this embodiment, at least a portion of the high-frequency sounds emitted from the right speaker 50R and passing through the first and second communication paths P1 and P2 is reflected toward the communication gap G1 by the reflecting surfaces 64a of the reflecting members 60, which are tilted toward the right speaker 50R, and reaches the rear side of the first sheet metal member 13.

[0034] On the other hand, low-frequency sounds emitted from the left speaker 50L and passing through the first and second communication paths P1 and P2 are unlikely to reach the reflecting surfaces 64a of the reflecting members 60, which are arranged at an angle toward the right speaker 50R, directly, and do not excessively reach the communication gap G1. That is, as shown in Fig. 3, low-frequency sounds emitted from the left speaker 50L pass through a sound emission path that reaches the performer positioned in the center in the left-right direction in front of the electronic keyboard instrument 1 without hitting the reflecting surfaces 64a of the reflecting members 60 (see dashed arrow VL). On the other hand, high-frequency sounds emitted from the right speaker 50R pass through both a sound emission path that reaches the performer without hitting the reflecting surfaces 64a, and a sound emission path that reaches the performer after being reflected by the reflecting surfaces 64a of the reflecting members 60 (see dashed arrow VR).

[0035] In this way, the high-pitched sound emitted from the right speaker 50R reaches the performer via a combination of a sound emission path that passes through the reflecting member 64 and a sound emission path that does not pass through the reflecting member 64, thereby compensating for the attenuation of the sound. As a result, the high-pitched sound and the low-pitched sound emitted from each speaker 50R, 50L reach the performer in a balanced manner. As a modified example, the reflecting surface 64a of each reflecting member 64 may be covered with a rubber material, so that a portion of the low-pitched sound emitted from the left speaker 50L is absorbed by the rubber material. This allows the sounds emitted from each speaker 50R, 50L to be emitted in a more balanced manner.

[0036] The third communication path, third communication path P3, extends from each speaker 50R, 50L upward through the rear space BS, passes through holes formed in the perforated member 40, and reaches the outside of the main body case 30 through the gap between the operation panel 18 and the front top plate 36F. Note that sounds emitted from each tweeter 70R, 70L pass through a part of the third communication path P3 before passing through holes formed in the perforated member 40 and reaching the outside of the main body case 30. The fourth communication path, fourth communication path P4, extends from each speaker 50R, 50L upward 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.

[0037] In this embodiment, at least a portion of the high-frequency sound emitted from the right speaker 50R and passing through the third and fourth communication paths P3 and P4 is reflected upwardly in the rear space BS by the reflecting surfaces 64a of the reflecting members 60. Therefore, a portion of the high-frequency sound emitted from the right speaker 50R reaches the upper side of the rear space BS efficiently. On the other hand, the low-frequency sound emitted from the left speaker 50L and passing through the third and fourth communication paths P3 and P4 does not reach the upper side of the rear space BS excessively. Therefore, the high-frequency and low-frequency sounds emitted from the speakers 50R and 50L reach the upper side of the rear space BS in a balanced manner.

[0038] Furthermore, because the saran net 66 has the property of absorbing high-frequency sounds, some of the high-frequency sounds emitted mainly from the right speaker 50R and reaching the upper part of the rear space BS through the saran net 66 are absorbed by passing through the saran net 66. This prevents high-frequency sounds that are excessively reflected by the reflective surfaces 64a of the reflecting members 60 from reaching the upper part of the rear space BS excessively, allowing a balanced sound image to be conveyed to the performer. As described above, the electronic keyboard instrument 1 has four communication paths P1 to P4 for sound emission, which allows sound to be effectively emitted from inside the main body case 30 toward the performer (toward the front and approximately the center in the left-right direction of the main body case 30), thereby producing a good sound image.

[0039] Furthermore, since two reflecting members 60 are provided spaced apart in the left-right direction, the reflection efficiency of sound emitted from the right speaker 50R and reflected forward by the reflecting surface 64a is increased. Specifically, for example, of the sound emitted from the right speaker 50R and directed toward the reflecting member 60, sound that is not reflected by the right reflecting member 64 (for example, sound that has gone around to the rear side of the right reflecting member 64) is reflected by the rear panel 33 to reach the left reflecting member 64, and is then reflected by the left reflecting member 64 to reach the performer, thereby increasing the reflection efficiency of the sound emitted from the right speaker 50R.

[0040] As modifications of the configuration in which two reflecting members 60 are provided on the left and right sides, the following four modifications can be cited, for example. In the first modification, the left reflecting member 64 is arranged in contact with the inner surface of the rear panel 33. This allows sounds that are not reflected by the right reflecting member 64 to be more reliably reflected forward by the left reflecting member 64. In the second modification, the inclination angles of the reflecting surfaces 64a of the two reflecting members 64 are different. If the rear space BS is larger in the front-to-rear direction, the efficiency of sound reflection toward the performer can be improved by increasing the inclination angle of the reflecting surface 64a of the left reflecting member 64 (for example, to 45°).

[0041] In a third modified example, at least one of the reflecting members 60 is disposed so that its reflecting surface 64a is not substantially perpendicular to the lower panel 37. If sound emitted from the right speaker 50R reaches the performer via at least each of the communication paths P1 to P4, the reflecting members 60 may be disposed so that their reflecting surfaces 64a are slightly tilted relative to the lower panel 37. In a fourth modified example, the reflecting surface 64a of the right reflecting member 60 is smaller in height than the reflecting surface 64a of the left reflecting member 60 (but is greater than the height of the communication gap G1), and the reflecting surface 64a of the left reflecting member 60 is disposed so that it is tilted upward. With this configuration, the right reflecting member 60 more reliably transmits sound to the first communication path P1 and the second communication path P2, and the left reflecting member 60 makes it easier for sound to reach the third communication path P3 and the fourth communication path P4.

[0042] As described above, the electronic keyboard instrument 1 of this embodiment comprises a main body case 30, a keyboard 20 provided within the main body case 30 and having a plurality of keys 22 arranged in the left-right direction of the main body case 30, speakers 50R, 50L including a left speaker 50L provided on one side of the main body case 30 in the left-right direction and emitting low-pitched sounds, and a right speaker 50R provided on the other side of the main body case 30 in the left-right direction and emitting high-pitched sounds, and a reflective member 60 having a reflective surface 64a that reflects sound and provided between the left speaker 50L and the right speaker 50R within the main body case 30, wherein the reflective surface 64a of the reflective member 60 is tilted towards the right speaker 50R in the left-right direction.

[0043] In the electronic keyboard instrument 1 of this embodiment configured as described above, high-pitched sounds emitted from the right speaker 50R are reflected toward the player (the front side of the main body case 30 and approximately the center in the left-right direction) by the reflecting surfaces 64a of the reflecting members 60 arranged at an angle toward the right speaker 50R, and are therefore delivered to the player efficiently. On the other hand, low-pitched sounds emitted from the left speaker 50L are less likely to reach the reflecting surfaces 64a of the reflecting members 60. This prevents the volume of the sounds reaching the player from varying locally across the left and right directions (variation between high-pitched sounds and low-pitched sounds), thereby improving the sense of uniformity of the sounds delivered to the player.

[0044] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the speakers 50R, 50L are provided below and behind the keyboard 20. Since the position of the performer in the electronic keyboard instrument 1 is in front of the keyboard 20, the above configuration makes it possible to provide specific positions for the speakers 50R, 50L so that the high-pitched sounds reflected by the reflecting surfaces 64a of the reflecting members 60 can be effectively delivered to the performer.

[0045] Furthermore, the electronic keyboard instrument 1 according to this embodiment has a first communication passage P1 inside the main body case 30 that runs from each speaker 50R, 50L to the spaces between each of the multiple keys 22, via the front side of each reflective surface 64a and the lower side of the keyboard 20. This provides a specific configuration for high-pitched sounds emitted from the right speaker 50R and reflected by each reflective surface 64a to be emitted toward the player from between each of the multiple keys 22, further enhancing the sense of uniformity of the sound that reaches the player.

[0046] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the main body case 30 has a communication gap G1 that connects the front side of the reflecting member 60 and the lower side of the keyboard 20, the first communication passage P1 is a communication passage that passes through the communication gap G1, and the height dimension H1 of the reflecting surface 64a is greater than the height dimension H2 of the communication gap G1. This configuration makes it possible for high-pitched sounds emitted from the right speaker 50R and reflected by each reflecting surface 64a to easily reach the communication gap G1. This makes it possible to realize a configuration in which high-pitched sounds emitted from the right speaker 50R can easily reach the performer via the first communication passage P1, further improving the sense of uniformity of the sound reaching the performer.

[0047] Furthermore, the electronic keyboard instrument 1 according to this embodiment has a second communication passage P2 inside the main body case 30, which runs from each of the speakers 50R, 50L to the upper side of the keyboard 20 via the front side of each of the reflecting surfaces 64a. This provides a specific configuration for emitting high-pitched sounds emitted from the right speaker 50R and reflected by each of the reflecting surfaces 64a from the upper side of the keyboard 20 toward the player, thereby further improving the sense of uniformity of the sound reaching the player.

[0048] Furthermore, the electronic keyboard instrument 1 according to this embodiment has a third communication passage P3 inside the main body case 30, which runs from each of the speakers 50R, 50L to the upper side of the keyboard 20 via the upper sides of the reflecting surfaces 64a. This provides another specific configuration for emitting high-pitched sounds emitted from the right speaker 50R and reflected by the reflecting surfaces 64a from the upper side of the keyboard 20 toward the player, thereby further improving the sense of uniformity of the sound reaching the player.

[0049] Furthermore, the electronic keyboard instrument 1 according to this embodiment has a fourth communication passage P4 inside the main body case 30, which runs from each of the speakers 50R, 50L to the upper side of the main body case 30 via the upper sides of the reflecting surfaces 64a. This provides a specific configuration for emitting high-pitched sounds emitted from the right speaker 50R and reflected by the reflecting surfaces 64a from the upper side of the main body case 30 toward the performer, thereby further improving the sense of uniformity of the sound reaching the performer.

[0050] The electronic keyboard instrument 1 according to this embodiment also includes a siren net 66 that covers the upper sides of the speakers 50R, 50L within the main body case 30. With this configuration, some of the high-pitched sounds emitted from the speakers 50R, 50L and passing through the siren net 66 to reach the upper part of the rear space BS are absorbed by passing through the siren net 66. This prevents excessive high-pitched sounds reflected by the reflecting surfaces 64a of the reflecting members 60 from reaching the upper side of the main body case 30, thereby improving the sense of uniformity of the sound that reaches the performer.

[0051] In the electronic keyboard instrument 1 according to this embodiment, the left speaker 50L is provided on the left side of the main body case 30, and the right speaker 50R is provided on the right side of the main body case 30. Specifically, the left speaker 50L and the right speaker 50R are provided at both ends of the main body case 30 in the left-right direction, and each reflecting member 60 is provided in the center of the main body case 30 in the left-right direction. Furthermore, each reflecting member 60 is provided so that the normal direction of the reflecting surface 64a forms an angle of 35° with respect to the left-right direction. With this configuration, since the performer is usually positioned in the center of the front side of the electronic keyboard instrument 1 in the left-right direction, the sound emitted from the right speaker 50R and reflected by the reflecting member 60 can be efficiently transmitted to the performer.

[0052] The above-described embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied 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 within the scope and spirit of the invention, and are also included in the scope of the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0053] 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 part 18 Operation panel 20 Keyboard 22 keys 22B black key 22W White Keys 24 Power Panel 24a Volume knob 26 Volume panel 26a Setting button 30 Main unit case 32 Front panel 32a Power button 33 Rear plate 34 Left side plate 35 Right side plate 36B Rear side top plate 36F Front top panel 36F1 Music stand 37 Bottom panel 38 Key cover 38a Front cover part 38b Rear cover part 40 Perforated material 50L Left speaker 50L1 Sound output unit 50R Right speaker 50R1 Sound emitting section 60 Reflection member 62 Screw-fastening part 64 Rising part 64a Reflective surface 66 Saran net 70L Left tweeter 70R Right tweeter 80 First support member 80a Convex portion 80b Platform part 80b1 Rotating fulcrum part 80c Recessed part 80d Recessed part opening 84 Hammer member 84a Weight part 84b Arm part 85 Control board 86 shaft 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 FL Front link member FS Front space P1 1st communication passage P2 2nd communication passage P3 3rd communication passage P4 4th communication passage

Claims

1. The housing and a keyboard provided on the front side of the housing and having a plurality of keys arranged in the left-right direction of the housing; a sound emitting member including a bass sound emitting member provided on one side in the left-right direction within the housing and emitting bass sounds, and a treble sound emitting member provided on the other side in the left-right direction within the housing and emitting treble sounds; a reflective member having a reflective surface that reflects sound, the reflective member being provided between the low-pitched sound-emitting member and the high-pitched sound-emitting member within the housing; the reflecting member is provided with a reflective surface inclined toward the treble sound-emitting member with respect to the left-right direction so that the sound emitted from the treble sound-emitting member is reflected by the reflective surface toward the front side of the housing and toward the center in the left-right direction. Electronic keyboard instrument.

2. The sound emitting member is provided below and behind the keyboard.

2. The electronic keyboard instrument according to claim 1.

3. a first communication passage extending from the sound emitting member to between the plurality of keys via a front side of the reflective surface and a lower side of the keyboard is provided within the housing; 3. The electronic keyboard instrument according to claim 2.

4. the housing has a gap communicating between a front side of the reflecting member and a lower side of the keyboard, the first communication passage is a communication passage that passes through the gap, The height dimension of the reflecting surface is greater than the height dimension of the gap.

4. The electronic keyboard instrument according to claim 3.

5. a second communication passage extending from the sound emitting member to an upper side of the keyboard via a front side of the reflecting surface within the housing; 3. The electronic keyboard instrument according to claim 2.

6. a third communication passage extending from the sound emitting member to an upper side of the keyboard via an upper side of the reflecting surface is provided within the housing; 3. The electronic keyboard instrument according to claim 2.

7. a fourth communication passage extending from the sound emitting member to an upper side of the housing via an upper side of the reflecting surface within the housing; 3. The electronic keyboard instrument according to claim 2.

8. a saran net covering an upper side of the sound emitting member and the reflecting member is provided within the housing; 2. The electronic keyboard instrument according to claim 1.

9. the bass-side sound-emitting member is provided on the left side in the left-right direction within the housing, The high-pitched sound-emitting member is provided on the right side in the left-right direction within the housing.

2. The electronic keyboard instrument according to claim 1.

10. the low-pitched sound-emitting member and the high-pitched sound-emitting member are provided at both ends in the left-right direction within the housing, The reflecting member is provided on the center side in the left-right direction within the housing.

10. The electronic keyboard instrument according to claim 9.

11. The reflection member is provided so that a normal direction of the reflection surface faces the treble sound-emitting member in the left-right direction.

2. The electronic keyboard instrument according to claim 1.

12. The reflecting member is provided so that the normal direction of the reflecting surface forms an angle within a range of 30° to 40° with respect to the left-right direction.

12. The electronic keyboard instrument according to claim 11.

13. The reflecting member is provided so that the reflecting surface is substantially perpendicular to the bottom plate of the housing.

2. The electronic keyboard instrument according to claim 1.

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