Electronic musical instruments and electronic keyboard musical instruments

Abstract

To provide an electronic musical instrument and an electronic keyboard musical instrument that can optimize the angle of sound emission from sound emission members relative to a player.SOLUTION: An electronic keyboard musical instrument 1 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; and a holed member 40 that has speakers 50R, 50L and tweeters provided in the body case 30, a wall part 42 extending in the left-and-right direction, low inclination holes opened in the wall part 42 to be inclined upward from the inside toward the outside of the body case 30 at an acute angle with respect to the fore-and-aft direction, and high inclination holes opened in the wall part 42 to be inclined from the inside toward the outside of the body case 30 at an acute angle larger than the low inclination holes with respect to the fore-and-aft direction. The holed member 40 includes a plurality of low inclination areas having the low inclination holes, and a plurality of high inclination areas having the high inclination holes 46, and the low inclination area and the high inclination area are provided along the left-and-right direction in a mutually adjacent arrangement.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to electronic musical instruments and electronic keyboard musical instruments.

Background Art

[0002] Conventionally, in an electronic musical instrument capable of obtaining a key touch feeling and a tone color close to those of a real piano, there is known one provided with a sound emission hole for emitting the sound from a sound emission member such as a speaker to the outside of the housing. For example, Patent Document 1 discloses a speaker device of an electronic organ including a speaker and two grills as sound emission holes provided so as to face the speaker. In this speaker device, each grill is composed of a left-right variable grill and an up-down variable grill, and the sound emission angle of the sound from the speaker can be changed by changing the angles of the blade plates of the left-right variable grill and the up-down variable grill.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the speaker device disclosed in Patent Document 1 above, the sound emission angle with respect to the performer can be adjusted by making the sound emission angles of the grill on one side and the grill on the other side different. However, it was impossible for the speaker device of Patent Document 1 to optimize the sound emission angle with respect to the performer without providing a movable mechanism such as rotation.

[0005] An object of the present invention is to provide an electronic musical instrument and an electronic keyboard musical instrument capable of optimizing the sound emission angle from a sound emission member with respect to a performer.

Means for Solving the Problems

[0006] The electronic musical instrument of the present invention includes a housing, an operating element provided on the housing, arranged in the left-right direction of the housing, and extending in the front-rear direction of the housing, a sound-emitting member provided in the housing, a wall portion extending in the left-right direction, a first inclined hole opened in the wall portion so as to be inclined from the inside to the outside of the housing at an acute angle with respect to the front-rear direction, and a second inclined hole opened in the wall portion so as to be inclined from the inside to the outside of the housing at an acute angle having a larger angle with respect to the front-rear direction than the first inclined hole, and a perforated member having the first inclined hole and the second inclined hole. The perforated member includes a plurality of first inclined regions having the first inclined holes and a plurality of second inclined regions having the second inclined holes, and the plurality of first inclined regions and the plurality of second inclined regions are provided along the left-right direction in an arrangement where the first inclined regions and the second inclined regions are adjacent to each other.

[0007] The electronic keyboard instrument of the present invention includes the above electronic musical instrument, and the operating element is a keyboard having a plurality of keys.

Advantages of the Invention

[0008] According to the present invention, it is possible to provide an electronic musical instrument and an electronic keyboard instrument capable of optimizing the sound emission angle from the sound-emitting member to the performer.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0010] (First Embodiment) The first embodiment of the present invention will be described with reference to FIGS. 1 to 8. The electronic keyboard instrument (electronic musical instrument) 1 shown in FIG. 1 includes a main body portion 10 and leg portions 100. As shown in FIG. 1, the main body portion 10 has a plurality of keys 22 including white keys 22W and black keys 22B, and a keyboard (operating element) 20 provided with the keying portions exposed, and a main body case (housing) 30 that surrounds and holds the keyboard 20. The leg portions 100 include a pair of side plate members 110, a pedal frame 120, and a pedal device 130. Hereinafter, the arrangement direction of the plurality of keys 22 of the keyboard 20 will be the left-right direction (the left side in FIG. 1 is the left direction), the extending direction of each key 22 will be the front-rear direction (the front side in FIG. 1 is the front direction), and the up-down direction of the electronic keyboard instrument 1 will be the up-down direction (the upper side in FIG. 1 is the up direction) for explanation.

[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 both plate surfaces facing in the left-right direction, and support the main body case 30. The pedal frame 120 connects between the side plate members 110 below each side plate member 110. The pedal device 130 is provided at substantially the center in the left-right direction of the pedal frame 120. In the electronic keyboard instrument 1, the main body case 30 of the main body portion 10 exposed to the outside and each side plate member 110 of the leg portion 100 are made of wood, giving a characteristic texture. Hereinafter, the configuration of the main body portion 10 will be described in detail.

[0012] As shown in FIGS. 1 to 4, the main body case 30 is substantially rectangular in shape with a long side in the left-right direction when viewed from above and below, and has thick plate-like members such as a front panel 32, a rear panel 33, a left side panel 34, a right side panel 35, a front top plate (second plate-like member) 36F, a rear top plate 36B, and a bottom panel 37, and its longitudinal section is substantially L-shaped (see FIG. 4). Note that FIG. 2 shows a state where the rear panel 33 is removed, and FIG. 3 shows a state where the right side panel 35 and the front top plate 36F are removed. The front panel 32 is substantially rectangular in shape with a long side in the left-right direction, and is provided below the lower part of the front end of the main body portion 10 and below the keyboard 20 to constitute the front surface of the main body case 30. A power button 32a is provided at the right end of the front panel 32. The rear panel 33 is substantially rectangular in shape with a long side in the left-right direction, and is provided at the rear of the main body portion 10 to constitute the rear surface of the main body case 30.

[0013] The left panel 34 and the right panel 35 are both substantially rectangular in shape and long in the front-rear direction, and a step is provided at a substantially central portion in the front-rear direction so that the front side has substantially the same height as the keyboard 20. The left panel 34 and the right panel 35 are provided on the left side and the right side of the main body 10 respectively, and constitute the left side surface and the right side surface of the main body case 30. The front top plate 36F is substantially rectangular in shape and long in the left-right direction, and is provided in front of the rear portion above the main body 10 to constitute a part of the upper surface of the main body case 30. The rear top plate 36B is substantially rectangular in shape and long in the left-right direction, and is provided behind the rear portion above the main body 10 to constitute a part of the upper surface of the main body case 30. As shown in FIGS. 1 and 3, a volume panel portion 24 in which a volume knob 24a and the like are arranged is provided between the keyboard 20 and the right panel 35. Also, a setting panel portion 26 in which various setting buttons 26a and the like are arranged is provided between the keyboard 20 and the left panel 34.

[0014] As shown in FIGS. 1 to 4, the rear top plate 36B is rotatably attached to the rear plate 33 so as to open forward. A substantially rectangular plate-shaped cover plate 11 that is long in the left-right direction is provided below the rear top plate 36B with both plate surfaces facing in the up-down direction. A plurality of substantially rectangular upper openings 11a that open upward with a space therebetween in the left-right direction are provided in the cover plate 11 (see FIG. 2). The upper surface and the side surface of the cover plate 11 are covered with a nylon net. When the rear top plate 36B is open, the cover plate 11 covers the opening below the rear top plate 36B so that the inside of the main body case 30 cannot be seen. Also, a music stand 36F1 is attached to a substantially central portion in the left-right direction of the front top plate 36F. The bottom plate 37 is substantially rectangular in shape and long in the left-right direction, and is provided below the main body 10 to constitute the bottom surface of the main body case 30.

[0015] As shown in FIGS. 3 and 4, a console member 12 in the shape of a substantially rectangular plate that is long in the left-right direction is provided on the rear side of each key 22 of the keyboard 20 with both plate surfaces facing in the up-down direction. The console member 12 is provided so as to cover the rear end portions of the keys 22 of the keyboard 20 at a position overlapping the front end portion 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 visible from the outside of the electronic keyboard instrument 1 through the gap at the rear end portion of the keyboard 20. Further, since the console member 12 is provided on the rear side of each key 22, the movement of each key 22 in the front-rear direction is restricted.

[0016] As shown in FIG. 4, a plurality of substantially plate-shaped first sheet metal members 13 that extend downward with both plate surfaces facing in the front-rear direction are provided at intervals along the left-right direction at the rear end portion of the lower surface of the console member 12. The lower end portions of the first sheet metal members 13 are attached to the lower surface plate 37. 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. Note that a plurality of notches (not shown) are provided at the lower end portions of the first sheet metal members 13. The spaces in front of and behind the first sheet metal members 13 inside the main body case 30 communicate with each other through 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, in the main body case 30, the portion between the front panel 32 and the console member 12 is open upward and forward, and a part of the upper surface and the front surface, which are the striking surfaces of the respective keys 22 on the keyboard 20, are exposed to the outside from this open portion. As shown in FIGS. 3 and 4, the main body 10 is provided with a key cover 38 that covers the portion of the keyboard 20 that is exposed to the outside. The key cover 38 is a thick plate-like member, and a front cover portion 38a and a rear cover portion 38b, which are substantially rectangular plate-like members that are long in the left-right direction, are arranged in parallel front and rear. The front cover portion 38a is rotatably connected to a front link member FL fixed to the main body case 30 via a horizontally long front attachment member 14. At a portion near the center (handle portion) of the front attachment member 14, two horizontally long substantially rectangular attachment openings 14a that open so as to penetrate the front attachment member 14 are provided on both sides in the left-right direction (see FIGS. 3 and 5).

[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 long rear attachment member 15. The front cover portion 38a and the rear cover portion 38b are foldably connected in two via a hinge, and are freely retractable into the space on the rear side of the first sheet metal member 13 inside the main body case from the gap between the console member 12 and an operation panel 18 described later. In the electronic keyboard instrument 1, when the power is turned off, the key cover 38 is pulled out from inside the main body 10 to cover the opening of the main body case 30 where the keyboard 20 is exposed, and the exposed portion of the keyboard 20 is covered.

[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 panel 18 is covered by the rear attachment member 15. Also, when the power is turned on and the key cover 38 is stored in the space on the rear side of the first sheet metal member 13, a slight gap is formed between the bottom panel 37 and the rear attachment member 15. For this reason, when the key cover 38 is stored, the inside of the main body case 30 is partitioned into a front side space FS provided on the front side of the key cover 38 and a rear side space BS provided on the rear side of the key cover 38.

[0020] As shown in FIGS. 3 and 4, a second sheet metal member 16 extending in the left-right direction is attached to the lower surface of the front top plate 36F (not shown in FIG. 3). At the front end of the second sheet metal member 16, an operation plate 18 (first plate-like member) in the shape of a substantially rectangular thick plate long in the left-right direction is provided with both plate surfaces facing in the front-rear direction. The operation plate 18 is provided between the key cover 38 and the front top plate 36F with gaps opening forward on both the upper and lower sides thereof. The operation plate 18 covers most of the space between the key cover 38 and the front top plate 36F so that the rear space BS cannot be seen. A part of the front surface of the operation plate 18 is a touch panel, and a plurality of switches (not shown) for receiving touch operations are provided. Therefore, the operation plate 18 has a touch operation detection mechanism for performing touch operations inside and an LED illumination mechanism for illuminating the switches.

[0021] On the front side of the second sheet metal member 16, a stepped portion 16a formed in a stepped shape is provided. A perforated member 40 in the shape of a substantially rectangular plate long in the left-right direction is screwed and attached to the stepped portion 16a with both plate surfaces facing in the front-rear direction. The perforated member 40 is made of resin formed by injection molding, and has a wall portion 42 provided with a plurality of holes (low-inclination holes 44 and high-inclination holes 46 described later) penetrating in the plate thickness direction. Further, the perforated member 40 is provided on the second sheet metal member 16 on the rear side of the operation plate 18 with a slight gap in the front-rear direction between the perforated member 40 and the operation plate 18. As shown in FIG. 4, the lower portion of the perforated member 40 overlaps the operation plate 18 in the front-rear direction. The configuration of the perforated member 40 will be described in detail later.

[0022] As shown in FIGS. 2 and 4, the electronic keyboard instrument 1 includes two speakers (first sound emitting members) 50R and 50L on the rear side of the lower surface plate 37 in the rear space BS. Both speakers 50R and 50L are provided below and on the rear side of the keyboard 20 in a form in which the sound emitting portions 50R1 and 50L1 having a substantially frustum shape are arranged above the lower surface plate 37. The sound from each of the sound emitting portions 50R1 and 50L1 is emitted into the rear space BS. One speaker 50R (hereinafter also referred to as the "right speaker 50R") is provided at a position closer to the right side of the upper surface of the lower surface plate 37 and corresponds to the emission of high frequency sounds. The other speaker 50L (hereinafter also referred to as the "left speaker 50L") is provided at a position closer to the left side of the upper surface of the lower surface plate 37 in a form parallel to the right speaker 50R in the left-right direction and corresponds to the emission of low frequency sounds.

[0023] Between both speakers 50R and 50L and at a position closer to the center in the left-right direction on the rear side of the upper surface of the lower surface plate 37, two reflecting members 60 for reflecting the sound emitted from both speakers 50R and 50L are provided in parallel in the left-right direction. Each reflecting member 60 is a substantially thick plate-shaped member arranged with both plate surfaces slightly inclined with respect to the left-right direction, and is attached by screwing the lower end portion to the lower surface plate 37. The front surface of each reflecting member 60 serves as a reflecting surface (not shown) for reflecting sound. Since these reflecting surfaces are inclined toward the right speaker 50R side, at least a part of the sound emitted from the right speaker 50R is reflected by each reflecting surface toward the front side and substantially the center in the left-right direction.

[0024] At positions obliquely above and in front of each of the speakers 50R and 50L in the rear space BS, tweeters 70R and 70L (second sound emitting members) are provided respectively. Each of the tweeters 70R and 70L has a substantially cylindrical shape, and is attached to the second sheet metal member 16 via a sub-sheet metal 17 (see FIGS. 4 and 5) attached to the inner surface side of the second sheet metal member 16 with the column axis direction and the sound emitting direction facing obliquely upward in the front direction. Hereinafter, the tweeter 70R provided on the right end side of the rear space BS is also referred to as the "right tweeter 70R", and the tweeter 70L provided on the left end side of the rear space BS is also referred to as the "left tweeter 70L".

[0025] Next, the configurations of the respective members provided in the front space FS will be described. As shown in FIG. 4, 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 lower side of the keyboard 20 and has a horizontally long shape similar to that of 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 described later. Further, the second sheet metal member 16 described above is provided on the rear side of the first support member 80.

[0026] The front end portion of the first support member 80 is a convex portion 80a that protrudes convexly upward. The portion of the first support member 80 located below the black key 22B of each key 22 is a trapezoidal portion 80b that bulges upward in a trapezoidal shape. Between the convex portion 80a and the trapezoidal portion 80b is a concave portion 80c that is recessed downward in a concave shape. On the rear side portion of the upper surface of the trapezoidal portion 80b, a rotation fulcrum portion 80b1 that rotatably supports the rear end portion of each key 22 of the keyboard 20 is provided. Further, a control substrate 85 is provided on the upper surface of the trapezoidal portion 80b. A switch is provided on the control substrate 85 so that a sound corresponding to the key 22 that has been struck is emitted. A plurality of concave portion openings 80d that open in the front-rear direction and the up-down direction are provided side by side in the left-right direction in the concave portion 80c (see FIG. 4).

[0027] Below the trapezoidal portion 80b in the space inside the first support member 80, a plurality of hammer members 84 connected to the respective keys 22 are provided. The 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 shaft support member 86 provided at the front side portion inside the trapezoidal portion 80b. When each key 22 is struck, the weight portion 84a of the hammer member 84 rises, and weight can be imparted when each key 22 is struck. Thereby, a key feeling close to that of an actual piano can be obtained.

[0028] In a portion of the space inside the first support member 80 that is in front of the portion where the hammer member 84 is disposed, a second support member 88 disposed on the lower surface plate 37 is provided. The second support member 88 is a hollow member that is open downward and is attached to the main body case 30 by being screwed to the lower surface plate 37. The keyboard 20 is indirectly supported with respect to the wooden main body case 30 via the first support member 80 by the second support member 88. A shaft support member 86 that supports the arm portion 84b of the hammer member 84 is provided on the second support member 88.

[0029] Next, the perforated member 40 provided on the rear side of the operation panel 18 will be described in detail. As shown in FIG. 6, the perforated member 40 has a substantially rectangular plate-shaped wall portion 42 that is long in the left-right direction. A plurality of low-inclination holes (first inclination holes) 44 and high-inclination holes (second inclination holes) 46 that are opened so as to penetrate substantially in the front-rear direction are provided in the wall portion 42. Here, FIGS. 7 and 8 show cross-sections of the low-inclination hole 44 and the high-inclination hole 46 with the left side being the front side. As shown in FIG. 8, the low-inclination hole 44 is a hole opened in the wall portion 42 such that the angle θ1 with respect to the front-rear direction forms an acute angle and inclines upward from the inside to the outside (front side) of the main body case 30. On the other hand, as shown in FIG. 7, the high-inclination hole 46 is a hole provided in the wall portion 42 so as to incline upward at an acute angle (in other words, at a steep angle) with a larger angle θ2 with respect to the front-rear direction than the low-inclination hole 44 from the inside to the outside of the main body case 30.

[0030] The perforated member 40 is arranged such that the low-inclination holes 44 and the high-inclination holes 46 incline upward toward the gap between the operation panel 18 and the front top plate 36F. The plurality of low-inclination holes 44 and high-inclination holes 46 are formed in a substantially honeycomb shape and are provided adjacent to each other in an alternating manner in the vertical direction. When looking at a cross-section cut in the left-right direction, the low-inclination holes 44 and the high-inclination holes 46 arranged at the same height appear at intervals. Further, as shown in FIGS. 7 and 8, both upper and lower end portions of the wall portion 42 form steps toward the inside and project outward, and the low-inclination holes 44 and the high-inclination holes 46 are provided in the wall portion 42 between both upper and lower end portions.

[0031] As shown in FIG. 6, the wall portion 42 is partitioned into nine regions R1 to R9 along the left - right direction. The sizes of the respective regions R1 to R9 are approximately equal. Note that the regions R2 facing the right - hand tweeter 70R and R8 facing the left - hand tweeter 70L are provided with a slightly larger width (left - right direction dimension) than the other regions R1, R3 to R7, R9. Each of the regions R1 to R9 includes low - inclination regions (first inclination regions) R2, R4, R6, R8 having a plurality of low - inclination holes 44 and high - inclination regions (second inclination regions) R1, R3, R5, R7, R9 having a plurality of high - inclination holes 46. The low - inclination regions R2, R4, R6, R8 and the high - inclination regions R1, R3, R5, R7, R9 are provided alternately along the left - right direction in the wall portion 42. In other words, the low - inclination regions R2, R4, R6, R8 and the high - inclination regions R1, R3, R5, R7, R9 are arranged adjacent to each other. Specifically, both end portions and the central portion in the left - right direction of the wall portion 42 are respectively the high - inclination regions R1, R5, R9.

[0032] In this embodiment, the low - inclination regions R2, R8 provided on both sides in the left - right direction of the wall portion 42 have a smaller inclination angle upward of the low - inclination holes 44 than the low - inclination regions R4, R6 provided on both sides of the central portion in the left - right direction of the wall portion 42. Also, the high - inclination region R5 provided at the central portion in the left - right direction of the wall portion 42 has a smaller inclination angle upward of the high - inclination holes 46 than the high - inclination regions R1, R3, R7, R9 provided at both end portions in the left - right direction of the wall portion 42. Specifically, the inclination angle of the low - inclination regions R2, R8 with respect to the front - rear direction is 20°, while the inclination angle of the low - inclination regions R4, R6 with respect to the front - rear direction is 26°. The inclination angle of the high - inclination region R5 with respect to the front - rear direction is 36°, while the inclination angle of the high - inclination regions R1, R3, R7, R9 with respect to the front - rear direction is 46°.

[0033] At the left and right ends of the wall portion 42 and at the boundary portions of the respective regions R1 to R7, screw holes 48 for screwing the perforated member 40 to the second sheet metal member 16 are provided so as to penetrate the wall portion 42 in the front-rear direction. And the perforated member 40 is attached to the second sheet metal member 16 such that a gap between the operation plate 18 and the front top plate 36F is positioned on the extension line in the penetrating direction of the low-inclination hole 44 and the high-inclination hole 46 provided obliquely (see FIG. 4). Note that the front and side surfaces of the wall portion 42 of the perforated member 40 are covered with a saran net, and the illustration thereof is omitted except in FIGS. 2 and 5.

[0034] Here, with reference to FIG. 5, the positional relationship between each of the tweeters 70R and 70L and the perforated member 40 will be described. FIG. 5 is a perspective view of some components showing the positional relationship between the right tweeter 70R and the perforated member 40 (the second sheet metal member 16 is not shown). As shown in FIG. 5, the right tweeter 70R is provided with a space therebetween so as to face the right end side of the perforated member 40 above the keyboard 20 (similarly, the left tweeter 70L is provided so as to face the left end side of the perforated member 40 above the keyboard 20). Specifically, the right tweeter 70R is provided so as to face the low-inclination region R2 of the perforated member 40, and the left tweeter 70L is provided so as to face the low-inclination region R2 of the perforated member 40. Each of the tweeters 70R and 70L is inclined upward toward the perforated member side, and the inclination angle (that is, the sound emission angle) is 20°, which is the same as the inclination angles of the low-inclination regions R2 and R8.

[0035] Next, the communication paths P1 to P4 provided inside the main body case 30, which serve as the sound emission paths for the sound emitted from each of the speakers 50R and 50L, will be described. As shown in FIG. 4, in the electronic keyboard instrument 1 of the present embodiment, four communication paths P1 to P4, which are the sound emission paths for the sound emitted from each of the speakers 50R and 50L to reach the outside of the main body case 30, are provided inside the main body case 30. The first communication path, the first communication path P1, reaches the front space FS via the gap between the bottom panel 37 and the rear attachment member 15 from each of the speakers 50R and 50L, passes under each hammer member 84, exits from the concave portion opening 80d to the upper side of the first support member 80, and is a communication path that reaches the outside of the main body case 30 between each key 22.

[0036] The second communication path, the second communication path P2, reaches the rear side of the first sheet metal member 13 via the gap between the bottom panel 37 and the rear attachment member 15 from each of the speakers 50R and 50L, passes through the rear side of the first sheet metal member 13 and exits upward, and is a communication path that reaches the outside of the main body case 30 from the attachment opening 14a. Here, at least a part of the high-frequency sound emitted from the right speaker 50R and passing through the first communication path P1 and the second communication path P2 is reflected by the reflecting surface of each reflecting member 60 to the gap side between the bottom panel 37 and the rear attachment member 15 and reaches the rear side of the first sheet metal member 13. For this reason, a part of the high-frequency sound emitted from the right speaker 50R reaches the rear side of the first sheet metal member 13 efficiently.

[0037] The third communication path, the third communication path P3, exits upward from the rear space BS from each of the speakers 50R and 50L, passes through the low-inclination holes 44 and the high-inclination holes 46 of the perforated member 40, and is a communication path that reaches the outside of the main body case 30 from the gap between the operation panel 18 and the front top plate 36F. Note that the sound emitted from each of the tweeters 70R and 70L passes through the low-inclination holes 44 and the high-inclination holes 46 of the perforated member 40 and reaches the outside of the main body case 30, so it passes through a part of the third communication path P3. The fourth communication path, the fourth communication path P4, exits upward from the rear space BS from each of the speakers 50R and 50L, and is a communication path that reaches the outside of the main body case 30 from the upper opening 11a of the cover plate 11.

[0038] Here, at least a part of the high-frequency sound emitted from the right speaker 50R and passing through the third communication path P3 and the fourth communication path P4 is reflected upward in the rear space BS by the reflecting surface 64a of each reflecting member 60. For this reason, a part of the high-frequency sound emitted from the right speaker 50R reaches efficiently upward in the rear space BS. As described above, in the electronic keyboard instrument 1, by having the four communication paths P1 to P4 for sound emission, sound is effectively emitted from the inside of the main body case 30 to the player side (in front of the main body case 30 and substantially at the center in the left-right direction), and a good sound image can be obtained.

[0039] Next, the action and effect of the sound emission via the third communication path P3 will be described in detail. The sound emitted from each speaker 50R, 50L and passing through the third communication path P3, and the sound emitted from each tweeter 70R, 70L are guided obliquely upward in the front direction by the inclination of the low-inclination holes 44 and the high-inclination holes 46 when passing through the low-inclination holes 44 and the high-inclination holes 46 of the perforated member 40. As a result, the sound heading from the rear space BS toward the perforated member 40 is efficiently propagated through the gap between the operation panel 18 and the front top plate 36F by the perforated member 40 and reaches the outside of the main body case 30. Therefore, the sound emission effect of the sound passing through the third communication path P3 to the player side can be enhanced.

[0040] Furthermore, in the perforated member 40, since a plurality of low-inclination regions R2, R4, R6, R8 and a plurality of high-inclination regions R1, R3, R5, R7, R9 are provided alternately in the left-right direction, by adjusting the inclination angles of the low-inclination holes 44 and the high-inclination holes 46, variations in the volume of the sound emitted to the player side, that is, the front side of the electronic keyboard instrument 1 via the third communication path P3 (variations in the volume of the high-frequency range and the volume of the low-frequency range) locally occur in the left-right direction, thereby suppressing a decrease in the uniformity of the sound reaching the player (hereinafter referred to as "the unevenness of the sound"). In the present embodiment, by individually adjusting the inclination angles of the low-inclination holes 44 and the high-inclination holes 46 in each of the regions R1 to R9 as described above, the sound emission angles of each of the regions R1 to R9 can be optimized. Thereby, the unevenness of the sound emitted to the player side via the third communication path P3 can be significantly suppressed.

[0041] Here, if all the inclination angles of the low-inclination holes 44 and the high-inclination holes 46 provided in the perforated member 40 are the same, or if the low-inclination regions R2, R4, R6, R8 and the high-inclination regions R1, R3, R5, R7, R9 are not provided alternately in the left-right direction and there is a bias in the arrangement of the low-inclination holes 44 and the high-inclination holes 46, there is a possibility that the sound emitted through the perforated member 40 may be overly concentrated on the head of the performer or overly concentrated in a direction other than the performer. In contrast, in the electronic keyboard instrument 1 of the present embodiment, by adjusting the inclination angles of the low-inclination holes 44 and the high-inclination holes 46 in each of the regions R1 to R9 as described above, even when the gap on the front side of the perforated member 40 (the gap between the operation panel 18 and the front top plate 36F) is narrow as in the present embodiment, it is possible to give the sound emitted through the perforated member 40 a spread of sound in the vertical and horizontal directions. Thereby, it is possible to suppress the concentration of sound in a specific direction with respect to the sound emitted through the perforated member 40.

[0042] As described above, the electronic keyboard instrument 1 according to the present embodiment includes a main body case 30, a keyboard 20 provided in the main body case 30 and having a plurality of keys 22 arranged in the left-right direction of the main body case 30, each speaker 50R, 50L and each tweeter 70R, 70L provided in the main body case 30, a wall portion 42 extending in the left-right direction, a low-inclination hole 44 opened in the wall portion 42 so as to incline from the inside to the outside of the main body case 30 at an acute angle with respect to the front-rear direction, and a high-inclination hole 46 opened in the wall portion 42 so as to incline at an acute angle with a larger angle with respect to the front-rear direction than the low-inclination hole 44 from the inside to the outside of the main body case 30, and a perforated member 40 having the low-inclination hole 44, the perforated member 40 includes a plurality of low-inclination regions R2, R4, R6, R8 having the low-inclination holes 44 and a plurality of high-inclination regions R1, R3, R5, R7, R9 having the high-inclination holes 46, and the plurality of low-inclination regions R2, R4, R6, R8 and the plurality of high-inclination regions R1, R3, R5, R7, R9 are provided along the left-right direction in an arrangement where the low-inclination regions R2, R4, R6, R8 and the high-inclination regions R1, R3, R5, R7, R9 are adjacent to each other.

[0043] In the electronic keyboard instrument 1 of the present embodiment configured as described above, since the sounds passing through the low-inclination holes 44 and the high-inclination holes 46 of the perforated member 40 can be guided upward toward the outside of the main body case 30, that is, the performer side, the sound emission effect of the sounds emitted from each speaker 50R, 50L and each tweeter 70R, 70L and passing through the perforated member 40 toward the performer side can be enhanced. Further, since the plurality of low-inclination regions R2, R4, R6, R8 and the plurality of high-inclination regions R1, R3, R5, R7, R9 are alternately provided along the left-right direction, the sound emission angle of the sound passing through the perforated member 40 can be adjusted and optimized along the left-right direction. As a result, the unevenness of the sound emitted to the performer side through the perforated member 40 can be reduced.

[0044] Also, in the electronic keyboard instrument 1 according to the present embodiment, the low-inclination holes 44 and the high-inclination holes 46 open so as to be inclined forward and either upward or downward from the inside of the main body case 30. Thereby, a specific opening direction can be provided for the low-inclination holes 44 and the high-inclination holes 46.

[0045] Also, in the electronic keyboard instrument 1 according to the present embodiment, the low-inclination regions R2, R4, R6, R8 and the high-inclination regions R1, R3, R5, R7, R9 are provided in an odd number in total. Here, the sound emitted to the performer side through the perforated member 40 has a greater influence on the unevenness of the sound in the central portion in the left-right direction than on both end sides in the left-right direction. If the number of each region R1 to R9 provided in the perforated member 40 is an odd number, the boundary portion of two regions is not arranged in the central portion in the left-right direction, and any one region can be arranged in the central portion in the left-right direction. For this reason, the sound emission angle of the sound passing through the perforated member 40 can be more effectively optimized.

[0046] Also, in the electronic keyboard instrument 1 according to the present embodiment, the perforated member 40 includes the high-inclination region R5 in the central portion in the left-right direction. For this reason, while effectively optimizing the sound emission angle of the sound passing through the perforated member 40, the sound is propagated more upward (toward the head side of the performer) in the central portion in the left-right direction, and the viewing and listening effects by the performer can be enhanced.

[0047] Also, in the electronic keyboard instrument 1 according to the present embodiment, the perforated member 40 includes a total of nine low-inclination regions R2, R4, R6, R8 and high-inclination regions R1, R3, R5, R7, R9. The low-inclination regions R4, R6 provided on both sides of the central portion in the left-right direction have a larger inclination angle upward on the upper side of the low-inclination holes 44 than the low-inclination regions R2, R8 provided on both end sides in the left-right direction. Further, the high-inclination region R5 provided in the central portion in the left-right direction has a smaller inclination angle upward on the upper side of the high-inclination holes 46 than the high-inclination regions R1, R9 provided on both end portions in the left-right direction. According to this configuration, while the low-inclination holes 44 and the high-inclination holes 46 are alternately provided in the left-right direction, by individually adjusting the inclination angles of the adjacent low-inclination holes 44 and high-inclination holes 46 as described above, the sound emission angles of the respective regions R1 to R9 can be optimized, and the unevenness of the sound emitted to the performer side through the perforated member 40 can be significantly suppressed.

[0048] Further, the electronic keyboard instrument 1 according to the present embodiment includes an operation panel 18 that extends in the left-right direction and is provided above the keyboard 20, and a front top plate 36F that extends in the left-right direction and is provided above the operation panel 18 with a gap provided between the operation panel 18. The perforated member 40 is arranged such that the low-inclination holes 44 and the high-inclination holes 46 incline upward toward the gap side. According to this configuration, the sound passing through the low-inclination holes 44 and the high-inclination holes 46 of the perforated member 40 can easily reach the outside of the main body case 30, that is, the performer side, and the visual and auditory effects by the performer can be enhanced.

[0049] In addition, in the electronic keyboard instrument 1 according to the present embodiment, as sound emitting members, there are included speakers 50R and 50L provided below and behind the keyboard 20, and tweeters 70R and 70L respectively provided so as to face both ends in the left - right direction of the perforated member 40 above the keyboard 20. According to this configuration, while allowing the sound from each of the speakers 50R and 50L to pass through all the low - slope holes 44 and high - slope holes 46 provided in the perforated member 40, the sound from each of the tweeters 70R and 70L can be made to pass through the low - slope holes 44 and high - slope holes 46 provided at both ends in the left - right direction of the perforated member 40. For this reason, due to the synergistic effect of the sound from each of the speakers 50R and 50L and the sound from each of the tweeters 70R and 70L, the acoustic effect of the sound passing through the perforated member 40 and reaching the performer side can be enhanced.

[0050] (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 9 and 10. As shown in FIGS. 9 and 10, in the electronic keyboard instrument according to the second embodiment, the configuration and shape of the perforated member 240 are different from those of the electronic keyboard instrument 1 of the first embodiment. Since the other configurations, operations, and effects are the same as those of the first embodiment, the description thereof will be simplified or omitted. In the second embodiment shown in FIGS. 9 and 10, members similar to those in the first embodiment are given the same reference numerals as in the first embodiment.

[0051] As shown in FIG. 9, the perforated member 240 included in the electronic keyboard instrument of the present embodiment is partitioned into nine regions R10 to R18 along the left - right direction by the wall portion 142 in the same manner as the perforated member 40 of the first embodiment. The high - slope regions R10 and R18 are provided at both ends in the left - right direction, and the low - slope regions R11, R13, R15, R17 and the high - slope regions R10, R12, R14, R16, R18 are alternately provided along the left - right direction. Further, in the perforated member 240, low - slope holes and high - slope holes are provided in two stages in the vertical direction in the wall portion 242 (see also FIG. 10). Hereinafter, the low - slope holes and high - slope holes provided in the lower stage are referred to as lower - stage low - slope holes 244L and lower - stage high - slope holes 246L, and the low - slope holes and high - slope holes provided in the upper stage are referred to as upper - stage low - slope holes 244U and upper - stage high - slope holes 246U.

[0052] Of the perforated member 240 provided in the upper and lower two stages, the lower stage portion is the same as the perforated member 40 of the first embodiment. That is, the shape, size, and inclination angle of each hole of the perforated member 240 are the same as those of the perforated member 40 of the first embodiment, and both end portions and the central portion in the left-right direction are high inclination regions R10, R18, and R14, respectively. Further, the perforated member 240 is arranged and sized such that the lower stage portion (lower stage low inclination holes 244L and lower stage high inclination holes 246U) faces the operation plate 18 in the front-rear direction. For this reason, most of the sound passing through the opening of the perforated member 240 from the inner side of the main body case 30 passes through the upper stage low inclination holes 244U and upper stage high inclination holes 246U and exits to the outside of the main body case 30 through the gap between the operation plate 18 and the front side top plate 36F.

[0053] Note that since the lower stage low inclination holes 244L and lower stage high inclination holes 246U are inclined toward the gap side between the operation plate 18 and the front side top plate 36F, it is possible to suppress the prevention of the sound passing through the opening of the perforated member 240 from passing through the lower stage low inclination holes 244L and lower stage high inclination holes 246U and exiting to the outside of the main body case 30 through the gap between the operation plate 18 and the front side top plate 36F. The inclination angle of the lower stage low inclination holes 244L and lower stage high inclination holes 246U may be a steep angle. In this case, the sound passing through the lower stage low inclination holes 244L and lower stage high inclination holes 246U can be easily configured to exit to the outside of the main body case 30 through the gap between the operation plate 18 and the front side top plate 36F.

[0054] The perforated member 240 of this embodiment and the perforated member 40 of the first embodiment can be manufactured using a common mold in part. That is, as shown in FIG. 10(b), the lower part of the perforated member 240 (lower low-inclination holes 244L, lower high-inclination holes 246L) and, as shown in FIG. 10(a), most of the perforated member 40 excluding the upper end part (low-inclination holes 44, high-inclination holes 46) have the same shape, size, inclination angle of each hole, etc., and thus can be manufactured by injection molding using the first cavity Ca1 and the first core Co1 which are common molds. On the other hand, as shown in FIG. 10(a), the upper end part of the perforated member 40 and, as shown in FIG. 10(b), the upper part of the perforated member 240 (upper low-inclination holes 244U, upper high-inclination holes 246U) can be manufactured by injection molding using the second cavity Ca2 and the second core Co2, the third cavity Ca3 and the third core Co3 which are different molds respectively.

[0055] As described above, the electronic keyboard instrument of this embodiment can obtain the same operational effects as the electronic keyboard instrument 1 of the first embodiment. That is, the sound passing through the perforated member 240 is induced to the performer side, and the sound emission effect to the performer side can be enhanced. Further, in the perforated member 240, since the low-inclination regions R11, R13, R15, R17 and the high-inclination regions R10, R12, R14, R16, R18 are alternately provided along the left-right direction, the unevenness of the sound emitted to the performer side passing through the perforated member 240 can be reduced.

[0056] Also, as described above, since the perforated member 240 of this embodiment and the perforated member 40 of the first embodiment can be manufactured using a common mold in part, while suppressing the cost of the mold, a plurality of different models of the perforated members 40 and 240 can be manufactured. For this reason, while suppressing the cost, a plurality of types of perforated members 40 and 240 can be made according to the height of the performer etc. so that the sound passing through the perforated members 40 and 240 has an optimal sound emission angle.

[0057] Note that the embodiments described above 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, replacements, and changes 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 invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0058] 1 Electronic keyboard instrument 10 Main body 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 portion 17 Sub-sheet metal 18 Operation panel 20 Keyboard 22 Keys 22B Black keys 22W White keys 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 panel 35 Right side panel 36B Rear side top plate 36F Front side top plate 36F1 Music stand 37 Bottom panel 38 Key cover 38a Front cover portion 38b Rear cover portion 40 Perforated member 42 Wall portion 44 Low-inclination holes 46 High-inclination holes 48 Screw holes 50L Left speaker 50L1 Sound emitting portion 50R Right speaker 50R1 Sound emitting portion 60 Reflecting member 70L Left tweeter 70R Right tweeter 80 First support member 80a Convex portion 80b Step-like portion 80b1 Rotation fulcrum portion 80c Concave portion 80d Concave portion opening 84 Hammer member 84a Weight portion 84b Arm portion 85 Control substrate 86 Shaft support member 88 Second support member 100 Leg portion 110 Side plate member 120 Pedal frame 130 Pedal device 240 Perforated member 242 Wall portion 244L Lower low-inclination hole 244U Upper low-inclination hole 246L Lower high-inclination hole 246U Upper high-inclination hole BL Rear link member BS Rear side space Ca1 First cavity Ca2 Second cavity Ca3 Third cavity Co1 First core Co2 Second core Co3 Third core FL Front link member FS Front side space P1 First communication path P2 Second communication path P3 Third communication path P4 Fourth communication path R1~R18 Regions θ1,θ2 Angles

Claims

1. A housing, operating elements provided on the housing, arranged in the left - right direction of the housing and extending in the front - rear direction of the housing, a sound - emitting member provided inside the housing, a perforated member having a wall portion extending in the left - right direction, a first inclined hole opened in the wall portion so as to be inclined from the inside to the outside of the housing at an acute angle with respect to the front - rear direction, and a second inclined hole opened in the wall portion so as to be inclined at an acute angle greater than that of the first inclined hole with respect to the front - rear direction from the inside to the outside of the housing, wherein the perforated member includes a plurality of first inclined regions having the first inclined holes and a plurality of second inclined regions having the second inclined holes, and the plurality of first inclined regions and the plurality of second inclined regions are provided along the left - right direction in an adjacent arrangement with each other, An electronic musical instrument.

2. The first inclined hole and the second inclined hole are opened so as to be inclined from the inside of the housing forward and toward either above or below. The electronic musical instrument according to Claim 1.

3. The first inclined region and the second inclined region are provided in an odd number in total. The electronic musical instrument according to Claim 1.

4. The perforated member includes the second inclined region at the central portion in the left - right direction. The electronic musical instrument according to Claim 3.

5. The perforated member includes a total of nine first inclined regions and second inclined regions. The first inclined holes of the first inclined regions provided on both sides of the central portion in the left - right direction are inclined at an angle greater with respect to the front - rear direction than the first inclined holes of the first inclined regions provided at both ends in the left - right direction, respectively. The electronic musical instrument according to Claim 4.

6. The perforated member includes a total of nine first inclined regions and second inclined regions. The second inclined holes of the second inclined regions provided at both ends in the left - right direction are inclined at an angle smaller with respect to the front - rear direction than the second inclined holes of the second inclined regions provided at the central portion in the left - right direction, respectively. The electronic musical instrument according to Claim 4.

7. a first plate - shaped member extending in the left - right direction and provided above the operating element, a second plate - shaped member extending in the left - right direction, provided above the first plate - shaped member with a gap provided between the second plate - shaped member and the first plate - shaped member, wherein the perforated member is arranged such that the first inclined holes and the second inclined holes are inclined from the inside to the outside of the housing and upward toward the gap side. The electronic musical instrument according to claim 1.

8. The perforated member has the first inclined holes and the second inclined holes extending in two stages in the vertical direction, and the first inclined holes and the second inclined holes on the lower stage side are provided so as to face the first plate-shaped member in the front-rear direction. The electronic musical instrument according to claim 7.

9. The sound-emitting member includes a first sound-emitting member provided below and rearward of the operating element, and second sound-emitting members respectively provided above the operating element so as to face both left and right ends of the perforated member in the left-right direction. The electronic musical instrument according to claim 1.

10. An electronic keyboard instrument comprising the electronic musical instrument according to any one of claims 1 to 9, wherein the operating element is a keyboard having a plurality of keys. Electronic keyboard instrument.

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