Electronic musical instrument and electronic keyboard musical instrument

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 an electronic musical instrument and an electronic keyboard instrument. [Background technology]

[0002] Conventionally, in electronic musical instruments that can provide a keystroke sensation and tone similar to that of a real piano, there are known instruments that have sound emission holes for emitting sound from a sound emission member such as a speaker to the outside of a housing. For example, Patent Document 1 discloses a speaker device for an electronic organ that has a speaker and two grilles as sound emission holes that are provided to face the speaker. In this speaker device, each grill is composed of a left-right variable grill and a top-bottom variable grill, and the sound emission angle from the speaker can be changed by changing the angle of the slats of the left-right variable grill and the top-bottom variable grill. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-52955 Summary of the Invention [Problem to be solved by the invention]

[0004] In the speaker device disclosed in the above Patent Document 1, the sound emission angle from the performer can be adjusted by making the sound emission angle of the grill on one side different from that of the grill on the other side. However, the speaker device in the above Patent Document 1 cannot optimize the sound emission angle from the performer without providing a movable mechanism such as a rotating mechanism.

[0005] An object of the present invention is to provide an electronic musical instrument and an electronic keyboard instrument that are capable of optimizing the sound emission angle from a sound emitting member relative to a player. [Means for solving the problem]

[0006] The electronic musical instrument of the present invention comprises a housing, controls provided in the housing, arranged in the left-right direction of the housing and extending in the front-to-rear direction of the housing, a sound-emitting member provided within the housing, and a wall extending in the left-right direction, a first inclined hole opened in the wall portion so as to incline from the inside to the outside of the housing at an acute angle with respect to the front-to-rear direction, and a second inclined hole opened in the wall portion so as to incline from the inside to the outside of the housing at a larger acute angle with respect to the front-to-rear direction than the first inclined hole, 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 first inclined regions and the second inclined regions are arranged adjacent to each other and the first inclined regions and the second inclined regions are arranged along the left-to-right direction.

[0007] An electronic keyboard instrument of the present invention includes the electronic instrument described above, and the operator is a keyboard having a plurality of keys. Effect of the Invention

[0008] According to the present invention, it is possible to provide an electronic musical instrument and an electronic keyboard instrument that are capable of optimizing the sound emission angle from the sound emitting member relative to the player. [Brief description of the drawings]

[0009] [Figure 1] 1 is an overall perspective view of an electronic keyboard instrument according to a first embodiment, as viewed from the front side; [Diagram 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. [Diagram 3] FIG. 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 right side panel removed. [Figure 4] 4 is a cross-sectional view of the main body of the electronic keyboard instrument according to the first embodiment, taken along line IV-IV in FIG. 2. FIG. [Diagram 5] 1 is a perspective view of a part of a main body of an electronic keyboard instrument according to a first embodiment, seen from the rear side. [Figure 6] FIG. 2 is a perspective view of the sound emitting member of the electronic keyboard instrument according to the first embodiment, as viewed from the rear side. [Figure 7] 7 is a cross-sectional view of the sound emitting member of the electronic keyboard instrument according to the first embodiment, taken along line VII-VII in FIG. 6. FIG. [Figure 8] 8 is a cross-sectional view of the sound emitting member of the electronic keyboard instrument according to the first embodiment, taken along the line VIII-VIII in FIG. 6. [Figure 9] FIG. 11 is a front view of a sound emitting member of an electronic keyboard instrument according to a second embodiment. [Figure 10] 1A to 1C are schematic cross-sectional views showing a molding method for the sound radiating member of the electronic keyboard instrument according to the first embodiment and the sound radiating member of the electronic keyboard instrument according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (First embodiment) A first embodiment of the present invention will be described with reference to Figs. 1 to 8. The electronic keyboard instrument (electronic 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 and with a keying portion exposed, and a main body case (housing) 30 that surrounds and holds the keyboard 20. The leg 100 includes a pair of side plate members 110, a pedal frame 120, and a pedal device 130. In the following description, the arrangement direction of the plurality of keys 22 of the keyboard 20 is the left-right direction (the left side of Fig. 1 is the left direction), the extension direction of each key 22 is the front-rear direction (the front side of Fig. 1 is the front direction), and the up-down direction of the electronic keyboard instrument 1 is the up-down direction (the upper side of Fig. 1 is the up direction).

[0011] As shown in FIG. 1, the pair of side plate members 110 are plate-like members that are erected on the installation surface on both the left and right sides of the electronic keyboard instrument 1 with both plate surfaces facing the left and right directions, and support the main body case 30. The pedal frame 120 connects the side plate members 110 below each other. The pedal device 130 is provided in the approximate center of the pedal frame 120 in the left and right direction. In the electronic keyboard instrument 1, the main body case 30 of the main body 10 exposed to the outside and each side plate member 110 of the leg 100 are each 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, and includes thick plate-like members, such as a front panel 32, a rear panel 33, a left panel 34, a right panel 35, a front top panel (second plate-like member) 36F, a rear top panel 36B, and a bottom panel 37, and has a generally L-shaped vertical section (see Fig. 4). Fig. 2 shows a state in which the rear panel 33 has been removed, and Fig. 3 shows a state in which the right panel 35 and the front top panel 36F have been removed. The front panel 32 has a generally rectangular shape that is long in the left-right direction, and is provided at the lower part of the front end of the main body 10 and below the keyboard 20 to form the front surface of the main body case 30. A power button 32a is provided at the right end of the front panel 32. The rear panel 33 has a generally rectangular shape that is long in the left-right direction, and is provided at the rear of the main body 10 to form the rear surface of the main body case 30.

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

[0014] As shown in Figs. 1 to 4, the rear top panel 36B is attached to the rear panel 33 so as to be rotatable so that the front side opens. A cover plate 11 having a substantially rectangular shape and elongated in the left-right direction is provided on the lower side of the rear top panel 36B with both plate surfaces facing the up-down direction. The cover plate 11 has a plurality of substantially rectangular upper openings 11a that open upward at intervals in the left-right direction (see Fig. 2). The upper and side surfaces of the cover plate 11 are covered with a saran net. When the rear top panel 36B is in an open state, the openings on the lower side of the rear top panel 36B are covered by the cover plate 11 so that the inside of the main body case 30 cannot be seen. In addition, a music stand 36F1 is attached to the front top panel 36F at approximately the center in the left-right direction. The lower panel 37 has a substantially rectangular shape and is provided below the main body part 10 to form the lower surface of the main body case 30.

[0015] As shown in Figures 3 and 4, a console member 12 in the form of 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 cover the rear ends of each key 22 of the keyboard 20 at a position where it overlaps with the front end of the front top plate 36F in the up-down direction. The console member 12 prevents the inside of the main body case 30 from being seen from outside the electronic keyboard instrument 1 through the gap at the rear end of the keyboard 20. In addition, the provision of the console member 12 behind each key 22 restricts the movement of each key 22 in the front-rear direction.

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

[0017] As shown in FIG. 3, the main body case 30 has an opening at the front upper side between the front panel 32 and the console member 12, and a part of the upper surface and the front surface, which are the striking surfaces of each key 22 of the keyboard 20, are exposed to the outside from this opening. As shown in FIG. 3 and FIG. 4, the main body 10 is provided with a key cover 38 that covers the part of the keyboard 20 that is exposed to the outside. The key cover 38 is a thick plate-like member, and is configured with a front cover part 38a and a rear cover part 38b, which are plate-like members having a substantially rectangular shape elongated in the left-right direction, arranged in parallel from front to back. The front cover part 38a is rotatably connected to the front link member FL fixed to the main body case 30 via the front attachment member 14 having a horizontally elongated shape. Two horizontally elongated substantially rectangular attachment openings 14a that open so as to penetrate the front attachment member 14 are provided on both sides in the left-right direction in a portion (handle portion) near the center of the front attachment member 14 (see FIG. 3 and FIG. 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 elongated rear attachment member 15. The front cover portion 38a and the rear cover portion 38b are connected in a bifold manner via hinges, and are stored in and out of the space behind the first sheet metal member 13 inside the main body case through a 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, 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 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 is generated between the lower plate 37 and the rear attachment member 15. Therefore, when the key cover 38 is stored, the inside 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 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). An operation plate 18 (first plate-shaped member) having a substantially rectangular thick plate shape 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 plate 36F with gaps opening to the front side 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 plate 36F so that the rear space BS is not visible. A part 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. For this reason, the operation plate 18 has a touch operation detection mechanism for performing touch operations and an LED illumination mechanism for illuminating the switches.

[0021] The second sheet metal member 16 has a stepped portion 16a at its front side. A substantially rectangular plate-shaped perforated member 40 that is elongated in the left-right direction is attached to the stepped portion 16a by screws with both plate surfaces facing 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) that penetrate in the plate thickness direction. The perforated member 40 is provided on the second sheet metal member 16 at the rear side of the operation plate 18 with a small gap between the perforated member 40 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. The configuration of the perforated member 40 will be described in detail later.

[0022] As shown in FIG. 2 and FIG. 4, the electronic keyboard instrument 1 is provided with two speakers (first sound emitting members) 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 the sound emitting parts 50R1, 50L1 of a substantially truncated cone shape being disposed above the lower panel 37. Sound from each sound emitting part 50R1, 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 toward the right side of the upper surface of the lower panel 37, and corresponds to the emission of high-pitched sounds. The other speaker 50L (hereinafter also referred to as the "left speaker 50L") is provided at a position toward the left side of the upper surface of the lower panel 37, in parallel with the right speaker 50R in the left-right direction, and corresponds to the emission of low-pitched sounds.

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

[0024] Tweeters 70R, 70L (second sound emitting members) are provided at positions diagonally above the front side of the speakers 50R, 50L in the rear space BS. Each tweeter 70R, 70L is substantially cylindrical, and is attached to the second sheet metal member 16 via a sub-sheet metal member 17 (see Figs. 4 and 5) attached to the inner surface side of the second sheet metal member 16 with its column axis direction and sound emitting direction facing diagonally above the front side. 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 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 on the front side of the first sheet metal member 13 in the front space FS. The first support member 80 is provided over substantially the entire area below the keyboard 20, and has a horizontally elongated shape similar to the keyboard 20. The first support member 80 is a hollow member that is open downward. The keyboard 20 is supported by the main body case 30 by the first support member 80 and a second support member 88, which will be described later. The second sheet metal member 16 described above is provided on the rear side of the first support member 80.

[0026] The front end of the first support member 80 is a convex portion 80a that protrudes upward. The portion of the first support member 80 that is located below the black key 22B of each key 22 is a platform portion 80b that protrudes upward. Between the convex portion 80a and the platform portion 80b is a concave portion 80c that is concave downward. A pivot point portion 80b1 that rotatably supports the rear end portion of each key 22 of the keyboard 20 is provided at the rear portion of the upper surface of the platform portion 80b. In addition, a control board 85 is provided on the upper surface of the platform portion 80b. The control board 85 is provided with a switch that generates a sound corresponding to the pressed key 22. The concave portion 80c is provided with a plurality of concave portion openings 80d that open in the front-rear and up-down directions and are arranged in the left-right direction (see FIG. 4).

[0027] A plurality of hammer members 84 are provided below the base portion 80b in the space inside the first support member 80, and are connected to the respective keys 22. The hammer members 84 each include a substantially triangular weight portion 84a and an arm portion 84b that extends linearly forward from the weight portion 84a. The arm portion 84b is rotatably supported by a pivot member 86 provided on the front portion of the inside of the base portion 80b. When each key 22 is struck, the weight portion 84a of the hammer members 84 rises, and weight can be applied to each key 22 when it is struck. This provides a striking sensation similar to that of a real piano.

[0028] A second support member 88 arranged on the bottom plate 37 is provided in a portion of the space inside the first support member 80 that is forward of the portion where the hammer member 84 is arranged. The second support member 88 is a hollow member that opens downward, and is attached to the main body case 30 by being screwed to the bottom plate 37. The second support member 88 indirectly supports the keyboard 20 via the first support member 80 with respect to the main body case 30, which is made of wood. A pivot member 86 that supports the arm portion 84b of the hammer member 84 is provided on the second support member 88.

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

[0030] The perforated member 40 is arranged such that the low inclination holes 44 and the high inclination holes 46 are inclined upward toward the gap between the operation plate 18 and the front-side top plate 36F. The low inclination holes 44 and the high inclination holes 46 are formed in a generally honeycomb shape and are arranged adjacent to each other in the vertical direction, so that the low inclination holes 44 and the high inclination holes 46 arranged at the same height appear spaced apart when viewed in a cross section cut in the horizontal direction. As shown in Figs. 7 and 8, the upper and lower ends of the wall portion 42 protrude outward with a step toward the inside, and the low inclination holes 44 and the high inclination holes 46 are provided in the wall portion 42 between the upper and lower ends.

[0031] As shown in FIG. 6, the wall 42 is divided into nine regions R1 to R9 along the left-right direction. The sizes of the regions R1 to R9 are approximately equal. The region R2 facing the right tweeter 70R and the region R8 facing the left tweeter 70L are provided with a width (left-right dimension) slightly larger than the other regions R1, R3 to R7, and R9. Each of the regions R1 to R9 includes low-incline regions (first inclined regions) R2, R4, R6, and R8 having a plurality of low-incline holes 44, and high-incline regions (second inclined regions) R1, R3, R5, R7, and R9 having a plurality of high-incline holes 46. The low-incline regions R2, R4, R6, R8 and the high-incline regions R1, R3, R5, R7, R9 are arranged alternately along the left-right direction on the wall portion 42, in other words, the low-incline regions R2, R4, R6, R8 and the high-incline regions R1, R3, R5, R7, R9 are arranged adjacent to each other. More specifically, both ends and the center of the wall portion 42 in the left-right direction are respectively formed as the high-incline regions R1, R5, R9.

[0032] In this embodiment, the low inclination regions R2, R8 provided on both left and right sides of the wall portion 42 have a smaller inclination angle of the low inclination hole 44 upward than the low inclination regions R4, R6 provided on both sides of the left and right central portion of the wall portion 42, and the high inclination region R5 provided in the left and right central portion of the wall portion 42 has a smaller inclination angle of the high inclination hole 46 upward than the high inclination regions R1, R3, R7, R9 provided on both left and right end sides 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°, and 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] Screw holes 48 for screwing the perforated member 40 to the second sheet metal member 16 are provided at both left and right ends of the wall portion 42 and at the boundaries between the regions R1 to R7, penetrating the wall portion 42 in the front-rear direction. The perforated member 40 is attached to the second sheet metal member 16 so that the gap between the operation plate 18 and the front-side top plate 36F is located on an extension line of the penetrating direction of the inclined low inclination holes 44 and high inclination holes 46 (see FIG. 4). The front and side surfaces of the perforated member 40 are covered with saran netting, which is omitted from the illustration except in FIGS. 2 and 5.

[0034] Here, the positional relationship between the tweeters 70R, 70L and the perforated member 40 will be described with reference to FIG. 5. FIG. 5 is a perspective view of some parts 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 at a distance from the perforated member 40 so as to face the right end side of the perforated member 40 above the keyboard 20 (the left tweeter 70L is similarly 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, 70L is inclined upward toward the perforated member side, and the inclination angle (ie, the sound emission angle) is set to 20°, the same as the inclination angle of the low inclination regions R2, R8.

[0035] Next, the communication paths P1 to P4 provided inside the main body case 30 and serving as sound emission paths for the sounds emitted from the speakers 50R and 50L will be described. As shown in Fig. 4, in the electronic keyboard instrument 1 of this embodiment, four communication paths P1 to P4 are provided inside the main body case 30 as sound emission paths for the sounds emitted from the speakers 50R and 50L to the outside of the main body case 30. The first communication path P1 is a communication path that runs from each speaker 50R, 50L through a gap between the lower panel 37 and the rear mounting member 15 to the front space FS, passes below each hammer member 84, exits from the recessed portion opening 80d to the upper side of the first support member 80, and reaches the outside of the main body case 30 from between each key 22.

[0036] The second communication path P2 is a communication path that extends from each speaker 50R, 50L through the gap between the lower plate 37 and the rear mounting member 15 to the rear side of the first sheet metal member 13, passes through the rear side of the first sheet metal member 13, and passes upward to the outside of the main body case 30 through the mounting opening 14a. At least a portion of the high-pitched sound emitted from the right speaker 50R and passes through the first communication path P1 and the second communication path P2 is reflected by the reflecting surfaces of the reflecting members 60 to the gap between the lower plate 37 and the rear mounting member 15, and reaches the rear side of the first sheet metal member 13. Therefore, a portion of the high-pitched sound emitted from the right speaker 50R is efficiently delivered to the rear side of the first sheet metal member 13.

[0037] The third communication path P3 is a communication path that passes from each speaker 50R, 50L upward through the rear space BS, passes through the low inclination hole 44 and the high inclination hole 46 of the perforated member 40, and reaches the outside of the main body case 30 through the gap between the operation plate 18 and the front top plate 36F. The sound emitted from each tweeter 70R, 70L passes through the low inclination hole 44 and the high inclination hole 46 of the perforated member 40 to reach the outside of the main body case 30, and passes through a part of the third communication path P3. The fourth communication path P4 is a communication path that passes 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.

[0038] Here, at least a part of the high-pitched sound emitted from the right speaker 50R and passing through the third communication passage P3 and the fourth communication passage P4 is reflected toward the upper side of the rear space BS by the reflecting surface 64a of each reflecting member 60. Therefore, a part of the high-pitched sound emitted from the right speaker 50R efficiently reaches the upper side of the rear space BS. As described above, the electronic keyboard instrument 1 has four communication passages P1 to P4 for emitting sound, so that sound is effectively emitted from inside the main body case 30 toward the player side (the front side of the main body case 30 and the approximately center side in the left-right direction), and a good sound image can be obtained.

[0039] Next, the effect of sound emission through the third communication passage P3 will be described in detail. When the sound emitted from each speaker 50R, 50L and passing through the third communication passage P3, and the sound emitted from each tweeter 70R, 70L pass through the low inclination hole 44 and the high inclination hole 46 of the perforated member 40, they are guided obliquely upward toward the front by the inclination of the low inclination hole 44 and the high inclination hole 46. As a result, the sound traveling toward the perforated member 40 in the rear space BS is efficiently propagated by the perforated member 40 to the gap between the operation plate 18 and the front top plate 36F and reaches the outside of the main body case 30, so that the effect of sound emission through the third communication passage P3 toward the performer can be improved.

[0040] Furthermore, since the perforated member 40 has a plurality of low inclination regions R2, R4, R6, and R8 and a plurality of high inclination regions R1, R3, R5, R7, and R9 alternately provided in the left-right direction, by adjusting the inclination angles of the low inclination holes 44 and the high inclination holes 46, the unevenness of the sound reaching the player (hereinafter referred to as "unevenness of sound") caused by the unevenness of the volume of the sound (variation of the volume of the high-pitched sound and the volume of the low-pitched sound) emitted to the player side, i.e., the front side of the electronic keyboard instrument 1, through the third communication passage P3 occurring locally in the left-right direction can be suppressed. In this embodiment, the sound emission angle of each of the regions R1 to R9 can be optimized by individually adjusting the inclination angles of the low inclination holes 44 and the high inclination holes 46 of each of the regions R1 to R9 as described above. As a result, the unevenness of the sound emitted to the player side through the third communication passage P3 can be significantly suppressed.

[0041] Here, if the inclination angles of the low inclination holes 44 and the high inclination holes 46 provided in the perforated member 40 are all the same, or if the low inclination regions R2, R4, R6, and R8 and the high inclination regions R1, R3, R5, R7, and R9 are not alternately provided in the left-right direction and the arrangement of the low inclination holes 44 and the high inclination holes 46 is biased, there is a risk that the sound emitted through the perforated member 40 will be concentrated too much on the head of the player or will be concentrated too much in directions other than the player. In contrast, in the electronic keyboard instrument 1 of this embodiment, by adjusting the inclination angles of the low inclination holes 44 and the high inclination holes 46 in each region R1 to R9 as described above, even if the gap on the front side of the perforated member 40 (the gap between the operation plate 18 and the front top plate 36F) is narrow as in this embodiment, the sound emitted through the perforated member 40 can be made to spread in the vertical and horizontal directions. This makes it possible to suppress the concentration of the sound emitted through the perforated member 40 in a specific direction.

[0042] As described above, the electronic keyboard instrument 1 according to this embodiment includes a main body case 30, a keyboard 20 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 within the main body case 30, a wall portion 42 extending in the left-right direction, low inclined holes 44 opened in the wall portion 42 so as to be inclined from the inside to the outside of the main body case 30 at an acute angle with respect to the front-to-rear direction, and a low inclined hole 44 opened in the wall portion 42 so as to be inclined from the inside to the outside of the main body case 30 at an angle smaller than the front-to-rear direction than the low inclined hole 44 from the inside to the outside of the main body case 30. and a perforated member 40 having high inclination holes 46 opened in a wall portion 42 so that the low inclination holes 44 are inclined at a large acute angle. The perforated member 40 includes a plurality of low inclination regions R2, R4, R6, R8 having low inclination holes 44 and a plurality of high inclination regions R1, R3, R5, R7, R9 having high inclination holes 46, and the low inclination regions R2, R4, R6, R8 and the high inclination regions R1, R3, R5, R7, R9 are arranged adjacent to each other, and the low inclination regions R2, R4, R6, R8 and the high inclination regions R1, R3, R5, R7, R9 are arranged along the left-right direction.

[0043] In the electronic keyboard instrument 1 of the present embodiment configured as described above, the sound passing through the low inclination hole 44 and the high inclination hole 46 of the perforated member 40 can be guided to the outside of the main body case 30, i.e., upward toward the player, so that the sound emission effect toward the player of the sound emitted from each speaker 50R, 50L and each tweeter 70R, 70L and passing through the perforated member 40 can be improved. Furthermore, since the multiple low inclination areas R2, R4, R6, and R8 and the multiple high inclination areas R1, R3, R5, R7, and 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 along the left-right direction to be optimized. As a result, the unevenness of the sound passing through the perforated member 40 and emitted toward the player can be reduced.

[0044] In the electronic keyboard instrument 1 according to this embodiment, the low inclination hole 44 and the high inclination hole 46 are opened so as to be inclined forward and either upward or downward from the inside of the main body case 30. This makes it possible to provide a specific opening direction for the low inclination hole 44 and the high inclination hole 46.

[0045] In addition, in the electronic keyboard instrument 1 according to this embodiment, an odd number of low inclination regions R2, R4, R6, R8 and high inclination regions R1, R3, R5, R7, R9 are provided. Here, the sound that passes through the perforated member 40 and is emitted to the player has a greater effect on the unevenness of the sound in the center in the left-right direction than on both ends 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 between two regions is not located in the center in the left-right direction, and any one of the regions can be located in the center in the left-right direction. Therefore, the emission angle of the sound that passes through the perforated member 40 can be more effectively optimized.

[0046] In addition, in the electronic keyboard instrument 1 according to this embodiment, the perforated member 40 includes a high inclination region R5 in the center in the left-right direction. Therefore, the sound emission angle of the sound passing through the perforated member 40 is effectively optimized, and the sound is propagated further upward (toward the head of the player) in the center in the left-right direction, improving the listening effect for the player.

[0047] In the electronic keyboard instrument 1 according to the present embodiment, the perforated member 40 includes nine low inclination regions R2, R4, R6, R8 and high inclination regions R1, R3, R5, R7, R9 in total, and the low inclination regions R4 and R6 provided on both sides of the center in the left-right direction have a larger inclination angle of the low inclination hole 44 toward the upper side than the low inclination regions R2 and R8 provided on both ends in the left-right direction. Furthermore, the high inclination region R5 provided in the center in the left-right direction has a smaller inclination angle of the high inclination hole 46 toward the upper side than the high inclination regions R1 and R9 provided on both ends in the left-right direction. According to this configuration, the low inclination holes 44 and the high inclination holes 46 are provided alternately in the left-right direction, and the inclination angles of the adjacent low inclination holes 44 and high inclination holes 46 are individually adjusted as described above, thereby optimizing the sound emission angle of each region R1 to R9, and the unevenness of the sound emitted to the player through the perforated member 40 can be significantly reduced.

[0048] Moreover, the electronic keyboard instrument 1 according to this embodiment includes an operation plate 18 extending in the left-right direction and provided above the keyboard 20, and a front top plate 36F extending in the left-right direction and provided above the operation plate 18 with a gap between the operation plate 18, and the perforated member 40 is arranged so that the low inclination holes 44 and the high inclination holes 46 are inclined upward toward the gap. With 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, i.e., the player's side, and the listening effect for the player can be improved.

[0049] In addition, the electronic keyboard instrument 1 according to this embodiment includes, as sound-emitting members, speakers 50R, 50L provided below and behind the keyboard 20, and tweeters 70R, 70L provided above the keyboard 20 so as to face both ends of the perforated member 40 in the left-right direction. With this configuration, the sound from each speaker 50R, 50L can pass through all the low inclination holes 44 and high inclination holes 46 provided in the perforated member 40, while the sound from each tweeter 70R, 70L can pass through the low inclination holes 44 and high inclination holes 46 provided at both ends of the perforated member 40 in the left-right direction. Therefore, the synergistic effect of the sound from each speaker 50R, 50L and the sound from each tweeter 70R, 70L can be enhanced by the acoustic effect of the sound passing through the perforated member 40 and reaching the player's side.

[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. The other configurations and effects are the same as those of the first embodiment, so the description thereof will be simplified or omitted. In the second embodiment shown in Figs. 9 and 10, the same members as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment.

[0051] As shown in Fig. 9, the perforated member 240 of the electronic keyboard instrument of this embodiment has a wall portion 142 divided into nine regions R10 to R18 along the left-right direction, similar to the perforated member 40 of the first embodiment, and low inclination regions R11, R13, R15, R17 and high inclination regions R10, R12, R14, R16, R18 are alternately provided along the left-right direction, with high inclination regions R10 and R18 at both ends in the left-right direction. Furthermore, in the perforated member 240, low inclination holes and high inclination holes are provided in two stages in the vertical direction in the wall portion 242 (see also Fig. 10). Hereinafter, the low inclination holes and high inclination holes provided in the lower stage are referred to as lower stage low inclination holes 244L and lower stage high inclination holes 246L, and the low inclination holes and high inclination holes provided in the upper stage are referred to as upper stage low inclination holes 244U and upper stage high inclination holes 246U.

[0052] The lower part of the perforated member 240 provided in two upper and lower stages 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 ends and the center in the left and right direction are high inclination regions R10, R18, and R14, respectively. In addition, the perforated member 240 is arranged and sized so that the lower part (lower stage low inclination hole 244L, lower stage high inclination hole 246U) faces the operation plate 18 in the front-rear direction. Therefore, most of the sound passing through the opening of the perforated member 240 from the inside of the main body case 30 passes through the upper stage low inclination hole 244U and upper stage high inclination hole 246U and goes out 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] In addition, since the lower-stage low-inclined hole 244L and the lower-stage high-inclined hole 246U are inclined toward the gap between the operation plate 18 and the front-side top plate 36F, it is possible to suppress the sound passing through the opening of the perforated member 240 from passing through the lower-stage low-inclined hole 244L and the lower-stage high-inclined hole 246U and being prevented from being prevented from being emitted 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-inclined hole 244L and the lower-stage high-inclined hole 246U may be a steep angle. In this case, it is possible to configure the sound passing through the lower-stage low-inclined hole 244L and the lower-stage high-inclined hole 246U to be easily emitted 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 by using a common mold for a part. That is, the lower part of the perforated member 240 (lower low inclined holes 244L, lower high inclined holes 246L) as shown in FIG. 10(b) and most of the perforated member 40 except for the upper end part (low inclined holes 44, high inclined holes 46) as shown in FIG. 10(a) have the same shape, size, and inclination angle of each hole, and therefore can be manufactured by injection molding using a common mold, the first cavity Ca1 and the first core Co1. On the other hand, the upper end part of the perforated member 40 as shown in FIG. 10(a) and the upper part of the perforated member 240 (upper low inclined holes 244U, upper high inclined holes 246U) as shown in FIG. 10(b) can be manufactured by injection molding using different molds, the second cavity Ca2 and the second core Co2, and the third cavity Ca3 and the third core Co3.

[0055] As described above, the electronic keyboard instrument of this embodiment can obtain the same effect as the electronic keyboard instrument 1 of the first embodiment. That is, the sound passing through the perforated member 240 is guided toward the player, and the sound emission effect toward the player can be improved. Furthermore, since the low inclination areas R11, R13, R15, and R17 and the high inclination areas R10, R12, R14, R16, and R18 are alternately provided in the left-right direction in the perforated member 240, the unevenness of the sound that passes through the perforated member 240 and is emitted toward the player can be reduced.

[0056] As described above, the perforated member 240 of this embodiment and the perforated member 40 of the first embodiment can be manufactured using a common mold for part of the perforated member, so that it is possible to manufacture a plurality of models with different perforated members 40, 240 while suppressing the cost of the mold. Therefore, it is possible to manufacture a plurality of types of perforated members 40, 240 according to the height of the player, etc., so that the sound passing through the perforated members 40, 240 has an optimal sound emission angle while suppressing the cost.

[0057] The above-described embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0058] 1 Electronic keyboard instrument 10 Main unit 11 Cover plate 11a Upper opening 12 console member 13 first sheet metal member 14 Front mounting member 14a Mounting opening 15 rear mounting member 16 second sheet metal member 16a Step 17 Sub-metal 18 Operation panel 20 Keyboard 22 keys 22B black key 22W White Keys 24 Volume Panel 24a Volume knob 26 Setting panel section 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 36F1 Music stand 37 Bottom plate 38 Key cover 38a Front cover part 38b Rear cover part 40 Perforated member 42 Wall part 44 Low slope hole 46 High slope hole 48 Screw hole 50L Left speaker 50L1 Sound output section 50R Right speaker 50R1 Sound emitting part 60 Reflection member 70L Left tweeter 70R Right tweeter 80 First support member 80a Convex portion 80b Platform part 80b1 Rotation fulcrum part 80c Recessed part 80d Recessed part opening 84 Hammer part 84a Weight part 84b Arm section 85 Control board 86 Axial support member 88 Second support member 100 Leg portion 110 Side plate member 120 Pedal frame 130 Pedal device 240 Perforated member 242 Wall part 244L Lower low slope hole 244U Upper low slope hole 246L Lower high slope hole 246U Upper high slope hole BL Rear link member BS Rear space Ca1 1st cavity Ca2 2nd cavity Ca3 3rd cavity Co1 1st core Co2 2nd core Co3 3rd core FL Front link member FS Front space P1 1st communication passage P2 2nd communication passage P3 3rd communication passage P4 4th communication passage R1~R18 area θ1,θ2 angle

Claims

1. A housing and an operator provided on the housing, arranged in a left-right direction of the housing, and extending in a front-rear direction of the housing; A sound emitting member provided in 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 incline 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 incline from the inside to the outside of the housing at an acute angle with respect to the front-rear direction that is larger than that of the first 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 first inclined regions and the second inclined regions are arranged adjacent to each other and are provided along the left-right direction. Electronic musical instrument.

2. The first inclined hole and the second inclined hole open forward from the inside of the housing and incline either upward or downward.

2. The electronic musical instrument according to claim 1.

3. The first inclined regions and the second inclined regions are provided in an odd number in total.

2. The electronic musical instrument according to claim 1.

4. The perforated member includes the second inclined region in a central portion in the left-right direction.

4. The electronic musical instrument according to claim 3.

5. The perforated member includes nine first inclined regions and nine second inclined regions, and the first inclined holes of the first inclined regions provided on both sides of the center in the left-right direction are inclined at an angle larger with respect to the front-rear direction than the first inclined holes of the first inclined regions provided on both ends in the left-right direction.

5. The electronic musical instrument according to claim 4.

6. The perforated member includes nine first inclined regions and nine second inclined regions, and the second inclined holes of the second inclined region provided in the center 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 both ends in the left-right direction.

5. The electronic musical instrument according to claim 4.

7. a first plate-like member extending in the left-right direction and provided above the operation element; a second plate-like member extending in the left-right direction and provided above the first plate-like member with a gap therebetween, The perforated member is arranged such that the first inclined hole and the second inclined hole are inclined upward from the inside to the outside of the housing toward the gap.

2. The electronic musical instrument according to claim 1.

8. The perforated member has the first inclined hole and the second inclined hole in two stages in the vertical direction, and the first inclined hole and the second inclined hole on the lower stage are provided so as to face the first plate-like member in the front-rear direction.

8. 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 operation element, and a second sound emitting member provided above the operation element so as to face both ends of the perforated member in the left-right direction, 2. The electronic musical instrument according to claim 1.

10. The electronic musical instrument according to any one of claims 1 to 9, The operator is a keyboard having a plurality of keys. Electronic keyboard instrument.

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