Electronic keyboard instrument

Abstract

We provide electronic keyboard instruments that can reproduce a sound field close to that of a real piano. [Solution] The electronic keyboard instrument 1 comprises a main body case 30, a keyboard 20 provided in the main body case 30 and arranged in the left-right direction of the main body case 30, speakers 50R and 50L provided inside the main body case 30, and reflectors 60R and 60L provided at the top of the main body case 30, having reflective surfaces 60R1 and 60L1 that reflect sound from the speakers 50R and 50L.

Description

Technical Field

[0001] The present invention relates to an electronic keyboard instrument.

Background Art

[0002] Conventionally, an electronic keyboard instrument capable of obtaining a key touch feeling and tone color close to those of an actual piano has been known. For example, Patent Document 1 discloses an electronic organ (electronic keyboard instrument) including an organ body, a keyboard, and a speaker housed in the organ body, which generates an electronic sound in response to a key press on the keyboard. In this electronic organ, a reflector is provided on the sound emission side of the speaker, and by reflecting the sound emitted from the sound emission surface of the speaker by the reflector, a listener can hear a performance sound in a better state including high-frequency sounds.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There may be a case where a performer wants to obtain a good sound image by emitting the sound emitted from a speaker from the inside of the housing toward the head side of the performer. However, in the electronic organ disclosed in Patent Document 1 above, the speaker is attached with the sound emission surface facing downward, and the sound emitted from the speaker is emitted from below the organ body to the outside and directed toward the reflector. Therefore, it is impossible to effectively deliver the sound emitted from the speaker and reflected by the reflector toward the performer side, and it has been difficult to reproduce a sound field close to that of an actual piano.

[0005] An object of the present invention is to provide an electronic keyboard instrument capable of reproducing a sound field close to that of an actual piano. [Means for solving the problem]

[0006] The electronic musical instrument of the present invention comprises a housing, a keyboard provided in the housing and arranged in the left-right direction of the housing, a sound-emitting member provided inside the housing, an upper surface member provided on the upper part of the housing, and a reflective member provided on the upper part of the housing within the housing having a reflective surface that reflects sound from the sound-emitting member, wherein the reflective member is fixed to the lower part of the upper surface member via a mounting member. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an electronic keyboard instrument that can reproduce a sound field close to that of a real piano. [Brief explanation of the drawing]

[0008] [Figure 1] This is an overall perspective view of the electronic keyboard instrument according to the embodiment, as seen from the front. [Figure 2] This is a transparent perspective view of the main body of an electronic keyboard instrument according to an embodiment, viewed from the front, and shows the internal structure of the main body. [Figure 3] This is a perspective view from below of the front top plate, cover plate, first perforated member, second perforated member, and reflector of an electronic keyboard instrument according to this embodiment. [Figure 4] This is a top view of the main body of an electronic keyboard instrument according to an embodiment, with the front top plate, rear top plate, and cover plate removed. [Figure 5] This is a cross-sectional view of the main body of an electronic keyboard instrument according to an embodiment, and is a cross-sectional view of the VV section in Figure 4. [Figure 6] This is a schematic side view showing one side of the reflector and its vicinity in an electronic keyboard instrument according to the embodiment, as seen from the left side. [Figure 7] This is a transparent top view of one side of the reflector and its vicinity in an electronic keyboard instrument according to an embodiment, viewed from above. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described with reference to the drawings. The electronic keyboard instrument 1 shown in Figure 1 comprises a main body 10 and leg parts 100. As shown in Figure 1, the main body 10 comprises a keyboard 20 having a plurality of keys 22 consisting of white keys 22W and black keys 22B, with the key-striking portion exposed, and a main body case (housing) 30 that surrounds and holds the keyboard 20. The leg parts 100 comprises 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 will be the left-right direction (left side in Figure 1 will be the left direction), the extension direction of each key 22 will be the front-back direction (front side in Figure 1 will be the front direction), and the up-down direction of the electronic keyboard instrument 1 will be the up-down direction (upper side in Figure 1 will be the up direction).

[0010] As shown in Figure 1, the pair of side panel members 110 are plate-shaped members erected on the mounting surface on both the left and right sides of the electronic keyboard instrument 1, with both panel surfaces facing left and right, and support the main body case 30. The pedal frame 120 connects the side panel members 110 at the underside of each side panel member 110. The pedal device 130 is provided approximately in the center of the pedal frame 120 in the left-right direction. In the electronic keyboard instrument 1, for example, the main body case 30 of the main body section 10 and each side panel member 110 of the leg section 100, which are exposed to the outside, are made of wood. The configuration of the main body section 10 will be described in detail below.

[0011] As shown in Figures 1 to 5, the main case 30 is a roughly rectangular shape with its longitudinal direction running horizontally 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 panel 36F, a rear top panel 36B, and a bottom panel 37, with a roughly L-shaped vertical cross-section (see Figure 5). Figure 2 shows the rear panel 33 removed, and Figure 4 shows the front top panel 36F, the rear top panel 36B, and the cover plate (top member) 11, which will be described later, removed. The front panel 32 is a roughly rectangular shape that is long horizontally and is located below the front end of the main body 10 and below the keyboard 20, forming the front of the main case 30. A power button 32a is provided at the right end of the front panel 32 (see Figure 1). The rear panel 33 is roughly rectangular in shape and elongated in the left-right direction. It is located behind the main body 10 and forms the rear surface of the main body case 30.

[0012] The left side panel 34 and the right side panel 35 are both roughly rectangular in shape, elongated in the front-to-back direction, and have a step approximately in the center in the front-to-back direction so that the front side is approximately at the same height as the keyboard 20. The left side panel 34 and the right side panel 35 are located on the left and right sides of the main body 10, respectively, forming the left and right sides of the main body case 30. The front top panel 36F is roughly rectangular in shape, elongated in the left-to-right direction, and is located on the front side of the upper rear portion of the main body 10, forming part of the top surface of the main body case 30. The rear top panel 36B is roughly rectangular in shape, elongated in the left-to-right direction, and is located on the rear side of the upper rear portion of the main body 10, forming part of the top surface of the main body case 30. As shown in Figures 1 and 4, a volume panel section 24, on which a volume knob 24a and the like are located, is provided between the keyboard 20 and the right side panel 35. A setting panel section 26, on which various setting buttons 26a and the like are located, is provided between the keyboard 20 and the left side panel 34.

[0013] As shown in Figures 1, 2, and 5, the rear top panel 36B is rotatably mounted to the rear panel 33 so that the front side opens. Below the rear top panel 36B, a roughly rectangular cover plate 11, which is long in the left-right direction, is provided with both surfaces facing up and down. The cover plate 11 has multiple roughly rectangular upper openings (holes) 11a that are spaced apart in the left-right direction and open upward from the inside of the main case 30 (see Figures 1 and 3). The top and sides of the cover plate 11 are covered with a speaker grille. When the rear top panel 36B is open, the cover plate 11 covers the opening on the underside of the rear top panel 36B, so that the inside of the main case 30 is not visible. Also, a music stand 36F1 is attached to the approximate center of the front top panel 36F in the left-right direction. The bottom panel 37 is roughly rectangular in shape, which is long in the left-right direction, and is provided below the main body 10 to form the bottom surface of the main case 30.

[0014] As shown in Figures 2 and 4, a roughly rectangular, long console member 12 is provided behind each key 22 of the keyboard 20, with both surfaces facing vertically. The console member 12 is positioned to overlap vertically with the front end of the front top plate 36F, and covers the rear end of each key 22 of the keyboard 20. The console member 12 prevents the inside of the main body case 30 from being seen from the outside of the electronic keyboard instrument 1 through the gap at the rear end of the keyboard 20. Furthermore, the presence of the console member 12 behind each key 22 restricts the movement of each key 22 in the front-to-back direction.

[0015] As shown in Figure 5, at the rear end of the lower surface of the console member 12, a plurality of roughly plate-shaped first sheet metal members 13 are provided at intervals along the left-right direction, with both plate surfaces facing in the front-rear direction. The lower ends of the first sheet metal members 13 are attached to the bottom plate 37. The rear side of the keyboard 20 is fixed to the main body case 30 by the first sheet metal members 13. The space in front of the first sheet metal members 13 is a space provided below the keyboard 20. Note that a plurality of notches (not shown) are provided at the lower ends of the first sheet metal members 13. The front and rear spaces of the first sheet metal members 13 inside the main body case 30 are connected by the spaces between the plurality of first sheet metal members 13 and by the notches provided in the first sheet metal members 13.

[0016] As shown in Figures 2 and 4, the main body case 30 has an opening on the front upper side between the front panel 32 and the console member 12, and a portion of the top and front surfaces of each key 22 on the keyboard 20, which are the striking surfaces, are exposed to the outside through this opening. The main body 10 is provided with a key cover 38 that covers the parts of the keyboard 20 that are exposed to the outside. The key cover 38 is a thick plate-like member and is composed of a front cover portion 38a and a rear cover portion 38b, which are roughly rectangular plate-like members that are long in the left-right direction and arranged in parallel front to back (see Figure 5). The front cover portion 38a is rotatably connected to a front link member FL fixed to the main body case 30 via a horizontally elongated front mounting member 14. The central part (handle portion) of the front mounting member 14 has two horizontally elongated roughly rectangular mounting openings 14a that penetrate the front mounting member 14, each on the left-right side.

[0017] As shown in FIG. 5, 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 connected in a two-foldable manner via a hinge, and are freely taken in and out of a space on the rear side of the first sheet metal member 13 inside the main body case 30 from a gap between the console member 12 and a display plate 18 described later. In the electronic keyboard instrument 1, when the power is turned off, an opening of the main body case 30 where the key cover 38 is pulled out from the inside of the main body portion 10 and the keyboard 20 is exposed is covered, and the exposed portion of the keyboard 20 is covered.

[0018] In the electronic keyboard instrument 1, in a state where the keyboard 20 is covered by the key cover 38, the gap between the console member 12 and the display plate 18 is covered by the rear attachment member 15. Also, in a state where 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 generated between the bottom plate 37 and the rear attachment member 15. Therefore, in a state where 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.

[0019] As shown in FIGS. 3 and 5, a second sheet metal member 16 extending in the left-right direction is attached to the lower surface of the front side top plate 36F. At the front end portion of the second sheet metal member 16, a substantially rectangular thick plate-shaped display plate 18 that is long in the left-right direction is provided with its display surface facing forward (see FIGS. 1 and 2). The display plate 18 is provided between the key cover 38 and the front side top plate 36F in an arrangement with gaps opening to the front side on both the upper and lower sides thereof. The display plate 18 covers most of the space between the key cover 38 and the front side top plate 36F so that the rear side space BS cannot be seen. The display plate 18 displays information regarding the performance of the electronic keyboard instrument 1 on a display surface provided on its front surface.

[0020] As shown in FIGS. 3 and 5, a substantially rectangular plate-shaped first perforated member 40 that is long in the left-right direction is screwed and attached in a posture with both plate surfaces facing the front-rear direction above the keyboard 20 on the front side of the second sheet metal member 16. The first perforated member 40 is provided on the front side of a reflector 60 described later. The first perforated member 40 is provided with a plurality of holes that open from the inside of the main body case 30 toward the front side (penetrate in the plate thickness direction). Further, the first perforated member 40 is provided on the second sheet metal member 16 on the rear side of the display plate 18 with a slight gap in the front-rear direction between the first perforated member 40 and the display plate 18. As shown in FIG. 5, the lower portion of the first perforated member 40 overlaps the display plate 18 in the front-rear direction.

[0021] As shown in FIGS. 2 and 4, the electronic keyboard instrument 1 includes a total of four speakers (sound emitting members) 50R and 50L, two on each side, on the upper surface of the lower surface plate 37 in the rear space BS. Each of the speakers 50R and 50L is provided below and behind the keyboard 20 in a form in which substantially frustum-shaped sound emitting portions 50R1 and 50L1 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 pair of speakers 50R on one side (hereinafter also referred to as "right speaker pair (high-frequency sound emitting member) 50R") are respectively provided at positions closer to the right side of the upper surface of the lower surface plate 37 and correspond to the emission of high-frequency sounds. The other pair of speakers 50L (hereinafter also referred to as "left speaker pair (low-frequency sound emitting member) 50L") are provided at positions closer to the left side of the upper surface of the lower surface plate 37 in a form arranged in parallel with the right speaker 50R in the left-right direction and correspond to the emission of low-frequency sounds.

[0022] As shown in Figures 2 to 4, above each speaker 50R, 50L and directly below the cover plate 11, two reflectors (reflecting members) 60R, 60L are provided on both the left and right sides of the main body case 30, independently of the main body case 30, to reflect the sound emitted from each speaker 50R, 50L. Specifically, one reflector 60R (hereinafter also referred to as the "right reflector (high-frequency reflector) 60R") is provided above the right speaker pair 50R so as to overlap in the vertical direction, and one reflector 60L (hereinafter also referred to as the "left reflector (low-frequency reflector) 60L") is provided above the left speaker pair 50L (see Figure 4). Each reflector 60R, 60L is attached to the lower surface of the cover plate 11 by screws via a third sheet metal member (mounting member) 19. The third sheet metal member 19 has a screw-fastening portion 19a that is screwed to the cover plate 11, and a mounting portion 19b that extends downward from the front end edge of the screw-fastening portion and to which the reflectors 60R and 60L are attached (see Figure 3).

[0023] Each reflector 60 is made of the same material, for example, a roughly rectangular piece of wood. Each reflector 60 is installed inside the main case 30 at approximately the same height as the display panel 18. As a result, the sound reflected by each reflector 60R, 60L is effectively guided towards the first perforated member 40 and the upper opening 11a. The forward-facing surfaces of each reflector 60R, 60L are the reflective surfaces 60R1, 60L1, respectively, that reflect sound. Each reflector 60R, 60L is installed in a position slightly tilted upward so that its reflective surfaces 60R1, 60L1 face towards the first perforated member 40 and the upper opening 11a (see Figure 5). The reflection angles of the reflective surfaces 60R1, 60L1 of each reflector 60R, 60L are equal. More specifically, as shown in Figure 6, each reflector 60R and 60L is installed in a position slightly tilted upward so that the angle θ1 between the cover plate 11 and the reflective surface 60a, in other words, the angle θ1 that each reflective surface 60R1 and 60L1 makes with respect to the front-rear direction is within the range of 60° to 70°.

[0024] Furthermore, each reflector 60R and 60L is positioned so that its reflective surface 60a is slightly tilted to the right with respect to the left-right direction. That is, each reflector 60R and 60L is positioned so that its reflective surfaces 60R1 and 60L1 are tilted toward the direction from the left speaker 50L toward the right speaker 50R. As a result, the reflective surface 60L1 of the left reflector 60L is directed toward the performer (towards the front and center of the main case 30), while the reflective surface 60R1 of the right reflector 60R is directed toward the direction away from the performer (towards the front and outward of the main case 30) (see Figure 4). More specifically, as shown in Figure 7, each reflector 60R and 60L is positioned slightly tilted to the right such that the angle θ2 between the rear plate 33 and the upper edge of the reflector 60, or in other words, the angle θ2 between each reflective surface 60R and 60L with respect to the left-right direction, is within the range of 5° to 10°. The mounting portion 19b of the third sheet metal member 19 is provided so as to extend parallel to the reflective surfaces 60R1 and 60L1 of each reflector 60R and 60L (see Figure 6).

[0025] Here, we will explain how sound is transmitted when emitted from each speaker 50R and 50L and reflected by each reflector 60R and 60L. As shown in Figure 4, the sound emitted from each speaker 50R and 50L is divided into direct sound, which is reflected inside the main case 30 and reaches the performer directly from inside the main case 30 (towards the front and center of the main case 30), and indirect sound, which spreads outside the main case 30 without reaching the performer, and is reflected by walls, etc., before reaching the performer. A portion of the sound reflected inside the main case 30 is reflected by the reflectors 60R and 60L and goes to the outside of the main case 30.

[0026] Of these, the sound emitted from the right speaker 50R is in the high-frequency range, so it is highly directional and does not spread easily. If the right reflector 60R is not provided, the direct sound component will be greater than the indirect sound component. In contrast, in this embodiment, the reflective surface 60R1 of the right reflector 60R is tilted slightly to the right (away from the performer), so the sound emitted from the right speaker 50R and reflected by the reflective surface 60R1 (hereinafter referred to as "outward reflected sound S1" (see Figure 2)) tends to be directed outwards from the main body case 30. Therefore, compared to a configuration without the right reflector 60R, the sound emitted from the right speaker 50R has an increased indirect sound component while the direct sound component is suppressed. As a result, the balance between the direct sound component and the indirect sound component of the sound emitted from the right speaker 50R is improved to be nearly uniform.

[0027] On the other hand, the sound emitted from the left speaker 50L is in the low-frequency range, so it has low directivity and spreads easily. If the left reflector 60L is not provided, the direct sound component will be insufficient compared to the indirect sound component. In contrast, in this embodiment, the reflective surface 60L1 of the left reflector 60L is tilted slightly to the right (towards the performer), similar to the right reflector 60R. As a result, the sound emitted from the left speaker 50L and reflected by the reflective surface 60L1 (hereinafter referred to as "inward reflected sound S2" (see Figure 2)) tends to be directed directly towards the performer. Therefore, compared to a configuration without the left reflector 60L, the direct sound component of the sound emitted from the left speaker 50L increases while the indirect sound component is suppressed. Consequently, the balance between the direct sound component and the indirect sound component of the sound emitted from the left speaker 50L is improved to be nearly uniform.

[0028] Furthermore, when the electronic keyboard instrument 1 of this embodiment is used, the performer's head will be positioned higher than the reflectors 60R and 60L. However, in this embodiment, the reflective surfaces 60R1 and 60L1 of the reflectors 60R and 60L are angled slightly upward. Therefore, compared to the case where the reflective surfaces 60R1 and 60L1 are facing forward, the sound emitted from the speakers 50R and 50L and reflected by the reflectors 60R and 60L reaches the performer's ears more easily. As described above, in this embodiment, the presence of the reflectors 60R and 60L ensures that both direct and indirect sound from the high-frequency sounds emitted from the right speaker 50R and the low-frequency sounds emitted from the left speaker 50L reach the performer's ears in a balanced manner.

[0029] Furthermore, if, instead of attaching each reflector 60R, 60L (each reflective surface 60R1, 60L1) to the underside of the cover plate 11, support legs are provided that are connected to the back surface of each reflector 60R, 60L and erected perpendicularly to the bottom plate 37 in order to fix (support) them at the height shown in Figure 5, then if the speakers 50R, 50L are placed on both the left and right sides inside the main case 30 (bottom plate 37), it becomes difficult to provide the support legs and each reflector 60R, 60L on both the left and right sides. Furthermore, if the speakers 50R and 50L are placed on both the left and right sides inside the main case 30 (bottom panel 37), and the reflectors 60R and 60L are attached to the bottom surface of the cover plate 11 inside the main case 30 and positioned closer to the center in the left-right direction, the sound from the speakers 50R and 50L will not be easily reflected by the reflectors 60R and 60L, making it difficult to distinguish between sounds that should be directed towards the performer and sounds that should not be directed towards the performer. In other words, even if the angle of the reflectors 60R and 60L is adjusted, the sound from the speakers 50R and 50L will not easily reach the reflectors 60R1 and 60L1. In contrast, in the electronic keyboard instrument 1 of this embodiment, each speaker 50R, 50 and each reflector 60R, 60L are provided on both the left and right sides inside the main body case 30 in the arrangement described above, so that the low-frequency sounds emitted from the left speaker 50L and the high-frequency sounds emitted from the right speaker 50R can be effectively reflected by the respective reflectors 60R, 60L.

[0030] Furthermore, while it is fundamentally difficult to reduce the width (left-right dimension) of the keyboard 20 or the number of keys 22 on the keyboard 20, there is a demand to minimize the front-to-back dimension as much as possible. In such cases, the thickness of the rear panel 33 may be reduced, but if the third sheet metal member 19 is fixed to the thinned rear panel 33, the screws for fixing the third sheet metal member 19 are likely to be exposed to the outside of the main body case 30, potentially impairing the appearance of the electronic keyboard instrument 1. Therefore, in this embodiment, the third sheet metal member 19 is fixed to a cover plate 11 whose thickness direction is vertical, different from the front-to-back direction, and which is covered by the rear top panel 36B, making it difficult for it to be exposed to the outside of the main body case 30, thereby suppressing any deterioration in the appearance of the electronic keyboard instrument 1.

[0031] Returning to the description of the configuration of each component within the main case 30, as shown in Figures 3 and 5, a roughly rectangular plate-shaped second perforated member 70, which is long in the left-right direction, is attached to the front end of the lower surface of the cover plate 11 with screws, with both plate surfaces facing in the front-back direction, on the rear side of the first perforated member 40 and above the keyboard 20. The second perforated member 70 has multiple holes that open from the inside of the main case 30 toward the front (penetrating in the thickness direction of the plate). The second perforated member 70 is also provided on the front side of each reflector plate 60R, 60L, with a gap in the front-back direction between them. Of the sound reflected by the reflective surfaces 60R1, 60L1 of each reflector plate 60R, 60L, the sound directed toward the front side of each reflector plate 60R, 60L passes through the holes provided in the second perforated member 70 and is emitted toward the front.

[0032] Next, the configuration of each component provided in the front space FS will be described. As shown in Figure 5, 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 almost the entire area below the keyboard 20 and has a horizontally elongated shape, similar to the keyboard 20 (see Figure 2). The first support member 80 is a hollow component that is open downwards. The keyboard 20 is supported by the main body case 30 by the first support member 80 and the second support member 88, which will be described later. The second sheet metal member 16 mentioned above is provided on the rear side of the first support member 80.

[0033] 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 located below the black key 22B of each key 22 is a base-shaped portion 80b that rises upward in a base-like shape. Between the convex portion 80a and the base-shaped portion 80b is a concave portion 80c that is recessed downward. A pivot point portion 80b1 is provided on the rear part of the upper surface of the base-shaped portion 80b, which rotatably supports the rear end portion of each key 22 of the keyboard 20. A control board 85 is also provided on the upper surface of the base-shaped portion 80b. A switch is provided on the control board 85 so that a sound corresponding to the key 22 that is struck is emitted. Multiple concave openings 80d that open in the front-rear and up-down directions are arranged in the left-right direction in the concave portion 80c (see Figure 4).

[0034] In the space inside the first support member 80, below the base-shaped portion 80b, a plurality of hammer members 84 are provided, each connected to a key 22. Each hammer member 84 comprises a roughly triangular weight portion 84a and an arm portion 84b extending linearly forward from the weight portion 84a. The arm portion 84b is rotatably supported by a pivot member 86 provided on the front inner portion of the base-shaped portion 80b. When each key 22 is struck, the weight portion 84a of the hammer member 84 rises, adding weight to each key 22 when it is struck. This makes it possible to obtain a playing sensation close to that of a real piano.

[0035] A second support member 88 is provided on the bottom plate 37 in the portion of the inner space of the first support member 80 that is forward of the portion where the hammer member 84 is positioned. The second support member 88 is a hollow member that is open downwards and is attached to the main body case 30 by being screwed to the bottom plate 37. The keyboard 20 is indirectly supported by the wooden main body case 30 via the first support member 80 by the second support member 88. The pivot support member 86 that supports the arm portion 84b of the hammer member 84 is provided on the second support member 88.

[0036] Next, the connecting passages P1 to P4, which are located inside the main body case 30 and serve as sound emission paths for the sound emitted from each speaker 50R and 50L, will be described. As shown in Figure 5, in the electronic keyboard instrument 1 of this embodiment, four connecting passages P1 to P4 are provided inside the main body case 30, which are sound emission paths for the sound emitted from each speaker 50R and 50L to the outside of the main body case 30. The first connecting passage, the first connecting passage P1, is a connecting passage that goes from each speaker 50R and 50L through the gap provided between the bottom plate 37 and the rear mounting member 15 to the front space FS, passes below each hammer member 84, exits through the concave opening 80d to the upper side of the first support member 80, and goes from between each key 22 to the outside of the main body case 30.

[0037] The second connecting passage, the second connecting passage P2, runs from each speaker 50R, 50L through the gap between the bottom 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 exits upward, reaching the outside of the main body case 30 through the mounting opening 14a. The third connecting passage, the third connecting passage P3, runs from each speaker 50R, 50L upward through the rear space BS, passes through the holes provided in the second perforated member 70 and the holes provided in the first perforated member 40 in sequence, and reaches the outside of the main body case 30 through the gap between the display panel 18 and the front top plate 36F. The fourth connecting passage, the fourth connecting passage P4, runs 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, the sound emitted from each speaker 50R, 50L and reflected by each reflector 60R, 60L mostly reaches the outside of the main case 30 via the fourth connecting passage P4, and the remaining components reach the outside of the main case 30 via the third connecting passage P3. In this embodiment, the sound emitted from each speaker 50R, 50L and passing through the third connecting passage P3 and the fourth connecting passage P4 is reflected by each reflector 60R, 60L, so as described above, the balance between the direct sound component S1 and the indirect sound component S2 approaches a nearly uniform direction for both high-frequency and low-frequency sounds, and is transmitted to the performer in a balanced manner. Note that since the sound reflected by each reflector 60R, 60L only needs to pass through at least the third connecting passage P3 to the outside of the main case 30, each reflector 60R, 60L is not limited to a configuration in which it is tilted upwards, but may also be tilted downwards.

[0039] As described above, the electronic keyboard instrument 1 according to this embodiment comprises a main body case 30, a keyboard 20 provided in the main body case 30 and arranged in the left-right direction of the main body case 30, speakers 50R and 50L provided inside the main body case 30, and reflectors 60R and 60L provided at the top of the main body case 30, having reflective surfaces 60R1 and 60L1 that reflect sound from the speakers 50R and 50L.

[0040] In the electronic keyboard instrument 1 of this embodiment, configured as described above, by adjusting the angles of the reflectors 60R and 60L, the direct sound component can be increased for inward reflected sound S2 that travels directly from inside the main case 30 towards the player by reflecting the low-frequency sounds with low directivity emitted from the speakers 50R and 50L off the reflectors 60R and 60L. Conversely, the indirect sound component can be increased for outward reflected sound S1 that travels from inside the main case 30 towards the outside of the main case 30 off the high-frequency sounds with high directivity emitted from the speakers 50R and 50L off the reflectors 60R and 60L. As a result, in the electronic keyboard instrument 1, the balance between direct and indirect sound components for the sounds emitted from each speaker 50R and 50L is improved to be nearly uniform, making it possible to reproduce a sound field close to that of a real piano.

[0041] Furthermore, the electronic keyboard instrument 1 according to this embodiment includes a cover plate 11 provided on the upper part of the main body case 30, and the reflectors 60R and 60L are provided on the cover plate 11 inside the main body case 30. This configuration provides a specific configuration for the mounting position of the reflectors 60R and 60L in the main body case 30. Also, since the performer's position in the electronic keyboard instrument 1 is above the main body case 30, by providing the reflectors 60R and 60L on the upper part of the main body case 30, the sound emitted from each speaker 50R and 50L and reflected by the reflectors 60R and 60L can be effectively delivered to the performer.

[0042] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the cover plate 11 has a hole that opens upward from the inside of the main body case 30. As a result, most of the sound emitted from each speaker 50R, 50L and reflected by the reflectors 60R, 60L passes through the hole in the cover plate 11 and goes to the outside of the main body case 30, so that the sound emitted from each speaker 50R, 50L and reflected by the reflectors 60R, 60L reaches the performer more effectively.

[0043] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the reflectors 60R and 60L include a left reflector 60L provided above the left speaker pair 50L and a right reflector 60R provided above the right speaker pair 50R. With this configuration, a portion of the sound emitted from the left speaker pair 50L is reflected by the left reflector 60L, and a portion of the sound emitted from the right speaker pair 50R is reflected by the right reflector 60R. Therefore, the sound emitted from the left speaker pair 50L and the sound emitted from the right speaker pair 50R can be reflected by different reflectors 60R and 60L.

[0044] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the reflectors 60R and 60L are provided such that the reflective surfaces 60R1 and 60L1 are tilted upward towards the main body case 30 and tilted in the left-right direction from the left speaker pair 50L to the right speaker pair 50R. With this configuration, the inward reflected sound S2 emitted from the left speaker pair 50L and reflected by the left reflector 60L can be effectively directed toward the performer (towards the center of the main body case 30 in the left-right direction and towards the upper side of the main body case 30), and the outward reflected sound S1 emitted from the right speaker pair 50R and reflected by the right reflector 60R can be effectively directed toward the outside of the main body case 30 (away from the performer).

[0045] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the reflectors 60R and 60L are positioned so as to be inclined upwards of the main body case 30, with the reflective surfaces 60R1 and 60L1 forming an angle θ1 within the range of 60° to 70° with respect to the front-to-back direction of the main body case 30. This provides a specific angle for the reflective surface 60L1 to effectively reflect the sound emitted from the left speaker pair 50L towards the performer using the left reflector 60L.

[0046] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the reflectors 60R and 60L are positioned so that their reflective surfaces 60R1 and 60L1 form an angle θ2 within the range of 5° to 10° with respect to the left-right direction of the main body case 30, and are inclined in the left-right direction from the left speaker pair 50L toward the right speaker pair 50R. This provides a specific angle for the reflective surface 60R1 to effectively reflect the sound emitted from the right speaker pair 50R outwards from the main body case 30 by the right reflector 60R.

[0047] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the left speaker pair 50L is located on the left side in the left-right direction within the main body case 30, and the right speaker pair 50R is located on the right side in the left-right direction within the main body case 30. With this configuration, high-frequency sounds are emitted from the right side of the main body case 30 and low-frequency sounds are emitted from the left side of the main body case 30, similar to a grand piano, while the balance between direct sound components and indirect sound components can be improved to be nearly uniform by the respective reflectors 60R and 60L, thereby reproducing a sound field close to that of a grand piano.

[0048] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the left reflector 60L, which is provided above the left speaker pair 50L, and the right reflector 60R, which is provided above the right speaker pair 50R, have the same inclination angle with respect to the main body case 30. With this configuration, the left reflector 60L and the right reflector 60R can be made common, which simplifies the manufacturing process and reduces manufacturing costs for the electronic keyboard instrument 1.

[0049] Furthermore, the electronic keyboard instrument 1 according to this embodiment includes a first perforated member 40 and a second perforated member 70, which have holes opening from the inside of the main body case 30 toward the front, and are provided in front of the main body case 30 and above the keyboard 20, relative to the reflectors 60R and 60L. With this configuration, the sound emitted from each speaker 50R and 50L and reflected toward the front by the reflectors 60R and 60L passes through the first perforated member 40 and the second perforated member 70 toward the performer, so the first perforated member 40 and the second perforated member 70 become sound propagation paths, and the sound can be effectively directed toward the performer.

[0050] The embodiments described above are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and essence of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0051] 1: Electronic keyboard instrument 10: Main body 11: Cover plate 12: Console component 13: First sheet metal component 16: Second sheet metal component 18: Display panel 19: Third sheet metal component 20: Keyboard 22: Keys 22B: Black keys 22W: White keys 24: Volume panel 26: Setting panel 30: Main case 32: Front panel 33: Rear panel 34: Left side panel 35: Right side panel 36B: Rear top panel 36F: Front top panel 36F1: Music stand 37: Bottom panel 50L: Left speaker pair 50R: Right speaker pair 60L: Left reflector 60R: Right reflector 84: Hammer component 85: Control board 86: Pivot support component 88: Second support component 100: Legs 110: Side panel component 120: Pedal frame 130: Pedal device θ1, θ2: Angle

Claims

1. The casing and A keyboard is provided in the housing and arranged in the left-right direction of the housing, A sound-emitting member provided inside the aforementioned housing, An upper surface member provided on the upper part of the housing, A reflective member having a reflective surface that reflects sound from the sound-emitting member, and provided on the upper part of the housing within the housing, The reflective member is fixed to the lower part of the upper member via a mounting member. Electronic keyboard instrument.

2. The upper member has a hole that opens upward from the inside of the housing. The electronic keyboard instrument according to claim 1.

3. The reflective member is provided at an angle such that its reflective surface faces upward towards the housing. The electronic keyboard instrument according to claim 2.

4. The reflective member is provided at an angle to the upper side of the housing such that the reflective surface forms an angle within the range of 60° to 70° with respect to the front-to-back direction of the housing. The electronic keyboard instrument according to claim 3.

5. The casing and A keyboard is provided in the housing and arranged in the left-right direction of the housing, A sound-emitting member comprising: a low-frequency sound-emitting member provided within the housing and located on one side in the left-right direction to emit low-frequency sounds; and a high-frequency sound-emitting member provided on the other side in the left-right direction to emit high-frequency sounds, A reflective member comprising a reflective surface that reflects sound from the sound-emitting member, provided within the housing at the upper part of the housing and above the low-frequency side sound-emitting member, and a high-frequency side reflective member provided above the high-frequency side sound-emitting member, The low-frequency reflective member and the high-frequency reflective member are provided such that their respective reflective surfaces are inclined in the left-right direction toward the high-frequency emitting member from the low-frequency emitting member. Electronic keyboard instrument.

6. The low-frequency reflective member and the high-frequency reflective member are provided such that their respective reflective surfaces form an angle within the range of 5° to 10° with respect to the left-right direction of the housing, and are inclined in the left-right direction toward the high-frequency sound-emitting member. The electronic keyboard instrument according to claim 5.

7. The low-frequency sound-emitting member is provided on the left side in the left-right direction within the housing. The high-frequency sound-emitting member is provided on the right side in the left-right direction within the housing. The electronic keyboard instrument according to claim 5.

8. The low-frequency reflective member and the high-frequency reflective member are at the same inclination angle with respect to the housing. The electronic keyboard instrument according to any one of claims 5 to 7.

9. The casing and A keyboard is provided in the housing and arranged in the left-right direction of the housing, A sound-emitting member provided inside the aforementioned housing, A reflective member having a reflective surface that reflects sound from the sound-emitting member, and provided at the upper part of the housing within the housing, The enclosure comprises a perforated member having a hole that opens from the inside toward the front, and which is located in front of the enclosure and above the keyboard, Electronic keyboard instrument.

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