keyboard instruments

Abstract

To ensure a sense of design unity for a keyboard instrument equipped with a speaker unit. The keyboard instrument includes a support member (23) and a board box 40 fixed to the support member 23 and for accommodating a control board; The base box 40 is fixed to the support member 23 in the X1 direction, and is provided with a first speaker box 50 for accommodating a first speaker unit 33 that produces sound in response to operation on the keyboard, and the end of the base box 40 in the X1 direction and the end of the first speaker box 50 in the X2 direction overlap each other in the depth direction.

Description

[Technical Field]

[0001] The present disclosure relates to keyboard instruments. [Background technology]

[0002] Electronic keyboard instruments that emit musical tones from speakers in response to the operation of the keyboard by the player have been proposed. For example, Patent Document 1 proposes a keyboard instrument in which a speaker is fixed to a plate-like member located below the keyboard. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-118360 Summary of the Invention [Problem to be solved by the invention]

[0004] Keyboard instruments require a high level of design. However, depending on the layout of elements such as speaker units that emit musical tones, the continuity of the keyboard instrument's appearance may be reduced, making it difficult to ensure a sense of design unity. In consideration of the above, one aspect of the present disclosure aims to ensure a sense of design unity for keyboard instruments equipped with speaker units. [Means for solving the problem]

[0005] A keyboard instrument according to one embodiment of the present disclosure comprises a support member, a board box fixed to the support member for accommodating a control board, and a first speaker box fixed to the support member on a first side of the board box for accommodating a first speaker unit that produces sound in response to operation on a keyboard, wherein the first side end of the board box and the second side end of the first speaker box opposite the first side overlap each other in the depth direction. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a front view of a keyboard instrument according to a first embodiment. [Figure 2] FIG. 1 is a block diagram of the internal configuration of a keyboard instrument. [Figure 3] FIG. 2 is a front view of the periphery of the base box of the keyboard instrument. [Figure 4] FIG. 2 is a bottom view of the periphery of the base box of the keyboard instrument. [Figure 5] FIG. 10 is a front view of the periphery of a base box of a keyboard instrument according to a comparative example. [Figure 6] FIG. 10 is a plan view of a fixing portion in the second embodiment. [Figure 7] 10 is an enlarged front view of the vicinity of a first lateral protrusion in the board box. FIG. [Figure 8] 10 is an enlarged front view of the vicinity of a second lateral protrusion in the board box. FIG. [Figure 9] FIG. 10 is a front view of a keyboard instrument according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0007] A: First embodiment 1 is a front view of a keyboard instrument 100 according to a first embodiment. The keyboard instrument 100 is an electronic musical instrument that emits musical tones in response to the performance of a performer.

[0008] In the following description, three mutually orthogonal axes (X-axis, Y-axis, Z-axis) are assumed. The X-axis is an axis extending in the left-right direction of the performer. One direction along the X-axis is referred to as the "X1 direction," and the direction opposite to the X1 direction is referred to as the "X2 direction." For example, the X1 direction corresponds to the performer's right direction, and the X2 direction corresponds to the performer's left direction. One of the X1 direction and the X2 direction is an example of a "first lateral direction," and the other of the X1 direction and the X2 direction is an example of a "second lateral direction."

[0009] The Y axis is an axis extending in the depth direction of the keyboard instrument 100 (in the front-to-back direction of the player). One direction along the Y axis is referred to as the "Y1 direction," and the opposite direction to the Y1 direction is referred to as the "Y2 direction." For example, the front of the keyboard instrument 100 (the direction from the keyboard instrument 100 facing the player) corresponds to the Y1 direction, and the rear of the keyboard instrument 100 (the direction from the player facing the keyboard instrument 100) corresponds to the Y2 direction. The Y1 direction is also referred to as the front side of the keyboard instrument 100 or the front side as seen from the player. The Y2 direction is also referred to as the back side of the keyboard instrument 100 or the far side as seen from the player. The XY plane is a plane parallel to the horizontal plane.

[0010] The Z axis is an axis along the vertical direction. One direction along the Z axis is referred to as the "Z1 direction," and the direction opposite to the Z1 direction is referred to as the "Z2 direction." The Z1 direction corresponds to the vertically upward direction, and the Z2 direction corresponds to the vertically downward direction. In the following explanation, observing any element of the keyboard instrument 100 from a line of sight along the Z axis is referred to as a "planar view."

[0011] The keyboard instrument 100 is an electronic piano that includes a keyboard 10 and a support 20. The keyboard 10 includes a plurality of keys 11 (white keys and black keys) that correspond to different pitches. Each key 11 is a performance operator that receives key-press and key-release operations by a performer. The plurality of keys 11 are arranged in the direction of the X-axis. In other words, the X-axis direction is the direction in which the plurality of keys 11 are arranged. The performer operates each key 11 in sequence to produce a musical tone of a desired pitch.

[0012] The support body 20 is a structure that supports the keyboard 10. The support body 20 includes a side wall member 21, a side wall member 22, a support member 23, a back member 24, and a cover member 25. The side wall members 21 and 22 are plate-like members parallel to the YZ plane and are arranged at a distance from each other in the X-axis direction. The support member 23 is a plate-like member parallel to the XY plane and is supported at a predetermined height by the side wall members 21 and 22. The keyboard 10 is supported by the support member 23. Specifically, the keyboard 10 is placed on the upper surface of the support member 23. Therefore, the support member 23 is located below the keyboard 10 (in the Z2 direction). The cover member 25 is pivotally supported on the rear edge of the support member 23 and rotates between a closed state in which it covers the keyboard 10 and an open state in which it exposes the keyboard 10. The back member 24 is a plate-like member parallel to the XZ plane, and is a plate-like member that constitutes the back surface of the keyboard instrument 100 between the side wall members 21 and 22. A plurality of pedals 26 are installed near the lower end of the back member 24.

[0013] Fig. 2 is a block diagram of the internal configuration of the keyboard instrument 100. As illustrated in Fig. 2, the keyboard instrument 100 includes a detection device 31, a sound source device 32, a first speaker unit 33, and a second speaker unit 34. The detection device 31 is a sensor that detects the displacement of each of the multiple keys 11, and is installed on, for example, the keyboard 10. The detection device 31 is composed of, for example, a sensor that detects the displacement of each key 11 optically, mechanically, or magnetically.

[0014] The sound source device 32 generates an audio signal corresponding to the displacement of each key 11 detected by the detection device 31. The audio signal is a two-channel stereo signal (left and right) representing a musical tone of a pitch corresponding to the key 11 operated by the performer. The sound source device 32 may be either a software sound source realized by a general-purpose arithmetic processing device, or a hardware sound source realized by a dedicated electronic circuit.

[0015] The first speaker unit 33 and the second speaker unit 34 are sound emitting devices that emit musical sounds represented by sound signals. Sound signals are supplied from the sound source device 32 to the first speaker unit 33 and the second speaker unit 34 via wiring (not shown). Specifically, a right-channel sound signal is supplied to the first speaker unit 33, and a left-channel sound signal is supplied to the second speaker unit 34.

[0016] 1, the keyboard instrument 100 further includes a base box 40, a first speaker box 50, and a second speaker box 60. In the following drawings, the base box 40, the first speaker box 50, and the second speaker box 60 are shaded for convenience.

[0017] The board box 40 is a box-shaped structure for accommodating the control board 35. The control board 35 is a circuit board on which the sound source device 32 is mounted. The first speaker box 50 is a box-shaped structure for accommodating the first speaker unit 33. The second speaker box 60 is a box-shaped structure for accommodating the second speaker unit 34. The board box 40, the first speaker box 50, and the second speaker box 60 are formed from various resin materials by, for example, injection molding using a molding die.

[0018] The board box 40, the first speaker box 50, and the second speaker box 60 are fixed to the support member 23. Specifically, the board box 40, the first speaker box 50, and the second speaker box 60 are installed on a bottom surface 231 of the support member 23 facing the Z2 direction.

[0019] The board box 40, the first speaker box 50, and the second speaker box 60 are arranged in the direction of the X axis. Specifically, the first speaker box 50 is located in the X1 direction of the board box 40. That is, the first speaker box 50 is fixed to the support member 23 in the X1 direction of the board box 40. The second speaker box 60 is located in the X2 direction of the board box 40. That is, the second speaker box 60 is fixed to the support member 23 in the X2 direction of the board box 40.

[0020] Fig. 3 is a front view of the periphery of the board box 40 of the keyboard instrument 100 as viewed in the Y2 direction. Fig. 4 is a bottom view of the periphery of the board box 40 of the keyboard instrument 100 as viewed in the Z1 direction.

[0021] The board box 40 is a molded product in which a board accommodating portion 41, a first lateral protrusion 42, a second lateral protrusion 43, and a plurality of fixing portions 44 are integrally formed. The board accommodating portion 41 is a box-shaped hollow portion that accommodates the control board 35. Specifically, the board accommodating portion 41 is formed in the shape of a rectangular parallelepiped that is elongated in the X-axis direction and opens in the Z1 direction.

[0022] The exterior surfaces of the board accommodating section 41 include a side surface 411, a side surface 412, a front surface 413, a back surface 414, and a bottom surface 415. The side surface 411 is an outer wall surface of the board accommodating section 41 facing the X1 direction, and the side surface 412 is an outer wall surface of the board accommodating section 41 facing the X2 direction. The front surface 413 is an outer wall surface of the board accommodating section 41 facing the Y1 direction (i.e., the front of the keyboard instrument 100), and the back surface 414 is an outer wall surface of the board accommodating section 41 facing the Y2 direction. The bottom surface 415 is a surface of the board accommodating section 41 facing the Z2 direction. The bottom surface 415 is a flat surface parallel to the XY plane.

[0023] The first lateral protrusion 42 protrudes in the X1 direction from the side surface 411 of the board accommodating portion 41 in the X1 direction. The first lateral protrusion 42 is a plate-like portion that is parallel to the XZ plane and flat in the Y-axis direction. The first lateral protrusion 42 is formed along the edge of the side surface 411 of the board accommodating portion 41 in the Y1 direction (front side). Specifically, the front surface 421 of the first lateral protrusion 42 is located in the same plane as the front surface 413 of the board accommodating portion 41. In other words, the front surface 421 of the first lateral protrusion 42 and the front surface 413 of the board accommodating portion 41 are continuous with no step along the XZ plane. The first lateral protrusion 42 constitutes the end portion of the board box 40 in the X1 direction.

[0024] The second lateral protrusion 43 protrudes in the X2 direction from the side surface 412 of the board accommodating portion 41 in the X2 direction. The second lateral protrusion 43 is a plate-like portion that is parallel to the XZ plane and flat in the Y-axis direction. The second lateral protrusion 43 is formed along the edge of the side surface 412 of the board accommodating portion 41 in the Y1 direction (forward side). Specifically, the front surface 431 of the second lateral protrusion 43 is located in the same plane as the front surface 413 of the board accommodating portion 41. That is, the front surface 431 of the second lateral protrusion 43 and the front surface 413 of the board accommodating portion 41 are continuous with each other without any steps along the XZ plane. As described above, the front surface 413 of the board accommodating portion 41, the front surface 421 of the first lateral protrusion 42, and the front surface 431 of the second lateral protrusion 43 are located in the same plane. The second lateral protrusion 43 constitutes the end of the board box 40 in the X2 direction.

[0025] Each of the multiple fixing portions 44 is a portion that protrudes outward in plan view from an edge portion in the Z1 direction of the board accommodating portion 41. A mounting hole 441 is formed in each fixing portion 44. A fastener (not shown), such as a screw or a bolt, passes through the mounting hole 441 of each fixing portion 44 and is fastened to the support member 23, thereby fixing the board box 40 to the support member 23.

[0026] The first speaker box 50 is a molded product in which a first speaker housing 51, a first protruding portion 52, a first peripheral edge portion 53, and a plurality of first fixing portions 54 are integrally formed. The first speaker housing 51 is a box-shaped hollow portion that houses the first speaker unit 33. Specifically, the first speaker housing 51 is formed in the shape of a rectangular parallelepiped that is long in the X-axis direction and opens in the Z1 direction.

[0027] The exterior surface of first speaker housing 51 includes side surface 511, side surface 512, front surface 513, back surface 514, and bottom surface 515. Side surface 511 is an outer wall surface of first speaker housing 51 that faces the X1 direction, and side surface 512 is an outer wall surface of first speaker housing 51 that faces the X2 direction. Side surface 512 faces side surface 411 of board housing 41 at a predetermined interval in the X-axis direction.

[0028] The front surface 513 is an outer wall surface of the first speaker housing 51 facing the Y1 direction. The front surface 513 of the first speaker housing 51 and the front surface 413 of the board housing 41 are located in the same plane parallel to the XZ plane. That is, the front surface 513 of the first speaker housing 51 and the front surface 413 of the board housing 41 are at the same position in the Y-axis direction. The back surface 514 is an outer wall surface of the first speaker housing 51 facing the Y2 direction. The back surface 514 of the first speaker housing 51 and the back surface 414 of the board housing 41 are located in the same plane parallel to the XZ plane.

[0029] The bottom surface 515 is a surface of the first speaker housing 51 facing the Z2 direction. The bottom surface 515 is a flat surface parallel to the XY plane. The bottom surface 515 of the first speaker housing 51 and the bottom surface 415 of the board control unit are located in the same plane parallel to the XY plane. In other words, the bottom surface 515 of the first speaker housing 51 and the bottom surface 415 of the board housing 41 are located at the same position in the Z axis direction.

[0030] Sound emission holes 516 are formed in the bottom surface 515. The sound emission holes 516 are composed of a plurality of through holes that penetrate the first speaker housing 51. The sound emission holes 516 are formed in the bottom surface 515 near the side surface 511 (a portion of the bottom surface 515 that is located in the X1 direction). The first speaker unit 33 is installed in the first speaker housing 51 so that its diaphragm that emits sound waves faces the sound emission holes 516. The sound waves emitted from the first speaker unit 33 pass through the sound emission holes 516 and are emitted to the outside.

[0031] The first protrusion 52 protrudes in the X2 direction from the side surface 512 of the first speaker housing 51. In the first embodiment, two first protrusions 52 are formed spaced apart in the Y-axis direction. Each first protrusion 52 is a plate-like portion that is parallel to the XZ plane and flat in the Y-axis direction. Each first protrusion 52 constitutes an end of the first speaker box 50 in the X2 direction.

[0032] The first lateral protrusion 42 and each of the first protrusions 52 overlap each other in the Y-axis direction. That is, the end of the board box 40 in the X1 direction (first lateral protrusion 42) and the end of the first speaker box 50 in the X2 direction (first protrusion 52) overlap each other in the depth direction. The first lateral protrusion 42 of the board box 40 is located further in the Y1 direction (i.e., in front of the keyboard instrument 100) than the first protrusion 52 of the first speaker box 50.

[0033] The tip surface of each of the first lateral protrusions 42 in the X1 direction faces, and is spaced apart from, the side surface 512 of the first speaker housing 51. Furthermore, the tip surface of each of the first protrusions 52 in the X2 direction faces, and is spaced apart from, the side surface 411 of the board housing 41. As described above, the board box 40 and the first speaker box 50 are arranged at an interval from each other in the X-axis direction.

[0034] The first peripheral edge portion 53 protrudes outward in a plan view from an edge portion of the first speaker housing 51 in the Z1 direction. Specifically, the first peripheral edge portion 53 is a plate-like portion formed in a rectangular frame shape around the entire periphery of the first speaker housing 51. A first sealing body 55 is interposed between the bottom surface 231 of the support member 23 and the first peripheral edge portion 53 of the first speaker box 50. The first sealing body 55 is a sealing seal made of an elastic material such as a rubber material, and is formed in a rectangular frame shape corresponding to the first peripheral edge portion 53. Sealing the gap between the first speaker box 50 and the support member 23 with the first sealing body 55 reduces the possibility of sound waves radiated from the first speaker box 50 leaking from the gap.

[0035] Each of the multiple first fixing portions 54 is a portion that protrudes outward in a plan view from the first peripheral edge portion 53. A mounting hole 541 is formed in each first fixing portion 54. A fastener (not shown), such as a screw or a bolt, passes through the mounting hole 541 of each first fixing portion 54 and is fastened to the support member 23, thereby fixing the first speaker box 50 to the support member 23.

[0036] The second speaker box 60 is a molded product in which a second speaker housing 61, a second protruding portion 62, a second peripheral edge portion 63, and a plurality of second fixing portions 64 are integrally formed. The second speaker housing 61 is a box-shaped hollow portion that houses the second speaker unit 34. Specifically, the second speaker housing 61 is formed in the shape of a rectangular parallelepiped that is long in the X-axis direction and opens in the Z1 direction.

[0037] The exterior surface of second speaker housing 61 includes side surface 611, side surface 612, front surface 613, rear surface 614, and bottom surface 615. Side surface 611 is an outer wall surface of second speaker housing 61 facing the X1 direction, and side surface 612 is an outer wall surface of second speaker housing 61 facing the X2 direction. Side surface 611 faces side surface 412 of board housing 41 at a predetermined interval in the X-axis direction.

[0038] The front surface 613 is an outer wall surface of the second speaker housing 61 facing in the Y1 direction. The front surface 613 of the second speaker housing 61 and the front surface 413 of the board housing 41 are located in the same plane parallel to the XZ plane. That is, the front surface 613 of the second speaker housing 61 and the front surface 413 of the board housing 41 are at the same position in the Y-axis direction. The back surface 614 is an outer wall surface of the second speaker housing 61 facing in the Y2 direction. The back surface 614 of the second speaker housing 61 and the back surface 414 of the board housing 41 are located in the same plane parallel to the XZ plane.

[0039] The bottom surface 615 is the surface of the second speaker housing 61 facing the Z2 direction. The bottom surface 615 is a flat surface parallel to the XY plane. The bottom surface 615 of the second speaker housing 61 and the bottom surface 415 of the board control unit are located in the same plane parallel to the XY plane. In other words, the bottom surface 615 of the second speaker housing 61 and the bottom surface 415 of the board housing 41 are in the same position in the Z axis direction.

[0040] Sound emission holes 616 are formed in the bottom surface 615. The sound emission holes 616 are composed of a plurality of through holes that penetrate the second speaker housing 61. The sound emission holes 616 are formed in the bottom surface 615 near the side surface 612 (a portion of the bottom surface 615 that is located in the X2 direction). The second speaker unit 34 is installed in the second speaker housing 61 so that its diaphragm that radiates sound waves faces the sound emission holes 616. The sound waves radiated from the second speaker unit 34 pass through the sound emission holes 616 and are radiated to the outside.

[0041] As described above, the first speaker unit 33 is installed in a portion of the first speaker box 50 located in the X1 direction, and the second speaker unit 34 is installed in a portion of the second speaker box 60 located in the X2 direction. That is, a sufficient distance is ensured between the first speaker unit 33 and the second speaker unit 34. Therefore, the audible spread of the sounds radiated by the first speaker unit 33 and the second speaker unit 34 can be sufficiently ensured.

[0042] The second protrusions 62 protrude in the X1 direction from the side surface 611 of the second speaker housing 61. In the first embodiment, two second protrusions 62 are formed spaced apart in the Y-axis direction. Each second protrusion 62 is a plate-like portion that is parallel to the XZ plane and flat in the Y-axis direction. Each second protrusion 62 constitutes an end of the second speaker box 60 in the X1 direction.

[0043] The second lateral protrusions 43 and the second protrusions 62 overlap each other in the Y-axis direction. That is, the end of the board box 40 in the X2 direction (the second lateral protrusions 43) and the end of the second speaker box 60 in the X1 direction (the second protrusions 62) overlap each other in the depth direction. The second lateral protrusions 43 of the board box 40 are positioned further in the Y1 direction (i.e., in front of the keyboard instrument 100) than the second protrusions 62 of the second speaker box 60.

[0044] The tip surface of the second lateral protrusion 43 in the X2 direction faces, and is spaced apart from, the side surface 611 of the second speaker housing 61. Furthermore, the tip surface of each second protrusion 62 in the X1 direction faces, and is spaced apart from, the side surface 412 of the board housing 41. As described above, the board box 40 and the second speaker box 60 are arranged at an interval from each other in the X-axis direction.

[0045] The second peripheral edge 63 protrudes outward in a plan view from the edge of the second speaker housing 61 in the Z1 direction. Specifically, the second peripheral edge 63 is a plate-like portion formed in a rectangular frame shape around the entire periphery of the second speaker housing 61. A second sealing body 65 is interposed between the bottom surface 231 of the support member 23 and the second peripheral edge 63 of the second speaker box 60. The second sealing body 65 is a sealing seal made of an elastic material such as rubber, and is formed in a rectangular frame shape corresponding to the second peripheral edge 63. Sealing the gap between the second speaker box 60 and the support member 23 with the second sealing body 65 reduces the possibility of sound waves radiated from the second speaker box 60 leaking from the gap.

[0046] Each of the multiple second fixing portions 64 is a portion that protrudes outward in a plan view from the second peripheral edge portion 63. A mounting hole 641 is formed in each second fixing portion 64. A fastener (not shown), such as a screw or a bolt, passes through the mounting hole 641 of each second fixing portion 64 and is fastened to the support member 23, thereby fixing the second speaker box 60 to the support member 23.

[0047] As illustrated in FIGS. 3 and 4, the first speaker box 50 and the second speaker box 60 have the same shape. That is, the first speaker box 50 and the second speaker box 60 are identical structures that are inverted in the X-axis direction. With the above configuration, the same components can be used for the first speaker box 50 and the second speaker box 60. Therefore, the manufacturing cost of the keyboard instrument 100 can be reduced compared to a configuration in which the first speaker box 50 and the second speaker box 60 have different shapes. For example, the first speaker box 50 and the second speaker box 60 can be molded using the same mold.

[0048] As described above, in the first embodiment, the X1 direction end (first lateral protrusion 42) of the board box 40 and the X2 direction end (first protrusion 52) of the first speaker box 50 overlap each other in the depth direction. Therefore, compared to the configuration in which the board box 40 and the first speaker box 50 are installed with a gap between them as illustrated in Fig. 5, it is easier to ensure a sense of design unity (e.g., continuity in appearance) between the board box 40 and the first speaker box 50. Similarly, in the first embodiment, the X2 direction end (second lateral protrusion 43) of the board box 40 and the X1 direction end (second protrusion 62) of the second speaker box 60 overlap each other in the depth direction. Therefore, compared to a configuration in which the board box 40 and the second speaker box 60 are installed at a distance from each other, as illustrated in Figure 5, it is easier to ensure a sense of design unity (e.g., continuity in appearance) between the board box 40 and the second speaker box 60.

[0049] In the first embodiment, the board box 40, the first speaker box 50, and the second speaker box 60 are installed separately, which makes it easier to seal the space in which the first speaker unit 33 and the second speaker unit 34 are installed, compared to a configuration in which the control board 35, the first speaker unit 33, and the second speaker unit 34 are housed in a single box. Furthermore, the manufacturing costs of the keyboard instrument 100 can be reduced, compared to a configuration in which a large box is required to house the control board 35, the first speaker unit 33, and the second speaker unit 34 individually. For example, the molding die for molding the first speaker unit 33 and the second speaker unit 34 can be made smaller, which reduces the manufacturing costs of the first speaker unit 33 and the second speaker unit 34.

[0050] In the first embodiment, the board box 40 includes a box-shaped board housing portion 41 and a first lateral protrusion 42 and a second lateral protrusion 43 protruding from a side surface of the board housing portion 41. Therefore, while the shape of the board housing portion 41 is a simple box shape, it is possible for the first lateral protrusion 42 and an end portion (first protrusion 52) of the first speaker box 50 in the X2 direction to overlap in the depth direction, and for the second lateral protrusion 43 and an end portion (second protrusion 62) of the second speaker box 60 in the X1 direction to overlap in the depth direction. Furthermore, the first speaker box 50 includes a box-shaped first speaker housing portion 51 and a first protrusion 52 protruding from a side surface 512 of the first speaker housing portion 51 in the X2 direction. Therefore, while the shape of the first speaker housing 51 is a simple box shape, it is possible for the first protrusion 52 and the first lateral protrusion 42 of the board box 40 to overlap in the depth direction. Similarly, the second speaker box 60 includes a box-shaped second speaker housing 61 and a second protrusion 62 protruding from a side surface 611 in the X1 direction of the second speaker housing 61. Therefore, while the shape of the second speaker housing 61 is a simple box shape, the second protrusion 62 and the second lateral protrusion 43 of the board box 40 can overlap in the depth direction.

[0051] Furthermore, in the first embodiment, the first lateral protrusion 42 of the board box 40 is positioned further in the Y1 direction than the first protrusion 52 of the first speaker box 50, and the second lateral protrusion 43 of the board box 40 is positioned further in the Y1 direction than the second protrusion 62 of the second speaker box 60. Therefore, it is easier to ensure a sense of unity in design between the board box 40, the first speaker box 50, and the second speaker box 60, compared to, for example, a configuration in which the first lateral protrusion 42 is positioned further in the Y1 direction than the first protrusion 52 and the second lateral protrusion 43 is positioned further in the Y2 direction than the second protrusion 62, or a configuration in which the first lateral protrusion 42 is positioned further in the Y2 direction than the first protrusion 52 and the second lateral protrusion 43 is positioned further in the Y1 direction than the second protrusion 62.

[0052] In the first embodiment, the front surface 413 of the substrate accommodating section 41, the front surface 421 of the first lateral protrusion 42, and the front surface 431 of the second lateral protrusion 43 are located in the same plane, so it is easier to maintain a sense of design unity (e.g., symmetry) in the substrate box 40 compared to a configuration in which there is a step between the front surface 413 of the substrate accommodating section 41 and the front surface 421 of the first lateral protrusion 42, or a configuration in which there is a step between the front surface 413 of the substrate accommodating section 41 and the front surface 431 of the second lateral protrusion 43.

[0053] Moreover, in the first embodiment, the board box 40 is disposed with a gap between it and each of the first speaker box 50 and the second speaker box 60. In the above configuration, for example, during the process of installing or disassembling (removing) the board box 40, the board box 40 can be moved in the X1 direction by the gap between it and the first speaker box 50. Therefore, compared to a configuration in which the board box 40 and the first speaker box 50 are installed without any gap between them, the installation or disassembly of the board box 40 is easier. Similarly, for example, during the process of installing or disassembling the board box 40, the board box 40 can be moved in the X2 direction by the gap between it and the second speaker box 60. Therefore, compared to a configuration in which the board box 40 and the second speaker box 60 are installed without any gap between them, the installation or disassembly of the board box 40 is easier.

[0054] B: Second embodiment A second embodiment will be described. In the following embodiments, elements that have the same functions as those in the first embodiment will be denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof will be omitted as appropriate.

[0055] 6 is a plan view of a fixing portion 44 in the second embodiment. Some of the multiple fixing portions 44 in the board box 40 of the second embodiment have elongated oval holes (so-called potbellied holes) formed as mounting holes 441 in the X-axis direction. The mounting holes 441 formed in the other fixing portions 44 are circular. When the fasteners of the fixing portions 44 having circular mounting holes 441 are removed and the fasteners of the fixing portions 44 having elongated holes as mounting holes 441 are loosened, the board box 40 is movable in the X-axis direction. Note that the first speaker box 50 may be made movable in the X-axis direction by forming the mounting holes 541 of some of the multiple first fixing portions 54 of the first speaker box 50 as elongated oval holes in the X-axis direction. Similarly, the mounting holes 641 of some of the second fixing portions 64 of the second speaker box 60 may be elongated oval holes extending in the X-axis direction, thereby making the second speaker box 60 movable in the X-axis direction.

[0056] 7 is an enlarged front view of the vicinity of the first lateral protrusion 42 of the substrate box 40. As illustrated in FIG. 7, a recess 422 is formed on the surface of the first lateral protrusion 42 of the substrate box 40 that faces the bottom surface 231 of the support member 23. The recess 422 is a depression formed in the vicinity of the end of the first lateral protrusion 42 in the X1 direction. The depth of the recess 422 is slightly greater than the total thickness of the first peripheral edge portion 53 and the first sealing body 55 of the first speaker box 50.

[0057] In the above configuration, when the board box 40 is moved in the X1 direction, the first peripheral edge 53 of the first speaker box 50 enters the inside of the recess 422 of the first lateral protrusion 42. That is, the first lateral protrusion 42 and the first peripheral edge 53 overlap each other in a plan view. With the above configuration, a sufficient range of movement of the board box 40 in the X1 direction can be ensured compared to a configuration in which the recess 422 is not formed in the first lateral protrusion 42. Therefore, the board box 40 can be easily attached or disassembled.

[0058] 8 is an enlarged front view of the vicinity of the second lateral protrusion 43 of the substrate box 40. As illustrated in FIG. 8, a recess 432 similar to the recess 422 of the first lateral protrusion 42 is formed on the surface of the second lateral protrusion 43 of the substrate box 40 that faces the bottom surface 231 of the support member 23. The recess 432 is a depression formed in the vicinity of the end of the second lateral protrusion 43 in the X2 direction. The depth of the recess 432 is slightly greater than the total thickness of the second peripheral edge portion 63 and the second sealing body 65 of the second speaker box 60.

[0059] In the above configuration, when the board box 40 is moved in the X2 direction, the second peripheral edge 63 of the second speaker box 60 enters the inside of the recess 432 of the second lateral protrusion 43. That is, the second lateral protrusion 43 and the second peripheral edge 63 overlap each other in a plan view. With the above configuration, a sufficient range of movement of the board box 40 in the X2 direction can be ensured compared to a configuration in which the recess 432 is not formed in the second lateral protrusion 43. Therefore, the board box 40 can be easily installed or disassembled.

[0060] C: Modified Example Specific modified embodiments that can be added to each of the embodiments exemplified above are exemplified below. Two or more embodiments arbitrarily selected from the following examples may be combined as appropriate within the scope of not being mutually contradictory.

[0061] (1) In the above-described embodiments, the board box 40 has the first lateral protrusion 42 and the second lateral protrusion 43, but the shape of the board box 40 is not limited to the above examples. Also, in the above-described embodiments, the first speaker box 50 has the first protrusion 52, and the second speaker box 60 has the second protrusion 62, but the shapes of the first speaker box 50 and the second speaker box 60 are not limited to the above examples.

[0062] 9, for example, the side surface 411 of the board box 40 is an inclined surface that slopes outward (X1 direction) in the Y2 direction. The side surface 412 of the board box 40 is an inclined surface that slopes outward (X2 direction) in the Y2 direction. Furthermore, the side surface 512 of the first speaker box 50 is an inclined surface that slopes toward the X1 direction in the Y2 direction, and the side surface 611 of the second speaker box 60 is an inclined surface that slopes toward the X2 direction in the Y2 direction.

[0063] 9, the X1-direction end of the board box 40 and the X2-direction end of the first speaker box 50 overlap each other in the depth direction. Furthermore, the X2-direction end of the board box 40 and the X1-direction end of the second speaker box 60 overlap each other in the depth direction. Therefore, in the configuration of FIG. 9, as in the first embodiment, it is easy to ensure a sense of unity in design (for example, continuity in appearance) between the board box 40, the first speaker box 50, and the second speaker box 60.

[0064] (2) In the above-described embodiments, the configuration in which the board box 40, the first speaker box 50, and the second speaker box 60 are installed on the bottom surface 231 of the support member 23 has been exemplified, but the configuration for supporting the board box 40, the first speaker box 50, and the second speaker box 60 by the support member 23 (for example, the shape of the support member 23) is not limited to the above examples and may be changed as desired. For example, a configuration in which the board box 40, the first speaker box 50, and the second speaker box 60 are installed on the upper surface of a plate-shaped support member 23, or a configuration in which the outer peripheries of the board box 40, the first speaker box 50, and the second speaker box 60 are held by a rectangular frame-shaped support member 23, are also conceivable.

[0065] (3) In each of the above-described embodiments, the keyboard instrument 100 is illustrated as including the first speaker box 50 and the second speaker box 60. However, one of the first speaker box 50 and the second speaker box 60 may be omitted. In other words, a monaural sound output system may be adopted in which one of the first speaker unit 33 and the second speaker unit 34 is omitted.

[0066] (4) In the above-described embodiments, the first lateral protrusion 42 of the substrate box 40 is positioned further in the Y1 direction than the first protrusion 52 of the first speaker box 50, but the first protrusion 52 may be positioned further in the Y1 direction than the first lateral protrusion 42. For example, the first lateral protrusion 42 may be positioned between two first protrusions 52 that are spaced apart from each other in the Y-axis direction.

[0067] Similarly, in the above-described embodiments, the second lateral protrusion 43 of the substrate box 40 is positioned further in the Y1 direction than the second protrusion 62 of the second speaker box 60, but the second protrusion 62 may be positioned further in the Y1 direction than the second lateral protrusion 43. For example, the second lateral protrusion 43 may be positioned between two second protrusions 62 that are spaced apart from each other in the Y-axis direction.

[0068] (5) The term "nth" (n is a natural number) in this application is used only as a formal and convenient label to distinguish each element in the description and does not have any substantive meaning. Therefore, there is no room for restrictive interpretation of the position of each element or the order of manufacture, etc., based on the term "nth."

[0069] D: Notes From the above description, preferred aspects of the present disclosure can be understood, for example, as follows.

[0070] A keyboard instrument according to one aspect (aspect 1) of the present disclosure comprises a support member, a board box fixed to the support member for accommodating a control board, and a first speaker box fixed to the support member on a first side of the board box for accommodating a first speaker unit that produces sound in response to operation on a keyboard, wherein the first side end of the board box and the second side end of the first speaker box opposite the first side overlap each other in the depth direction.

[0071] In the above-described embodiment, the first lateral end of the board box and the second lateral end of the first speaker box overlap each other in the depth direction. Therefore, compared to a configuration in which the board box and the first speaker box are installed at a distance from each other, it is easier to ensure a sense of design unity (e.g., continuity in appearance) between the board box and the first speaker box. Furthermore, because the board box and the first speaker box are installed separately, it is easier to seal the space in which the first speaker unit is installed, compared to a configuration in which the control board and the first speaker unit are housed in a single box. Furthermore, compared to a configuration in which a large box is required to house the control board and the first speaker unit separately, the manufacturing costs of the keyboard instrument can be reduced.

[0072] In a specific example (Aspect 2) of Aspect 1, the speaker system further includes a second speaker box fixed to the support member on the second side of the board box for accommodating a second speaker unit that produces sound in response to operation of the keyboard, wherein the second side end of the board box and the first side end of the second speaker box overlap each other in the depth direction. In the above aspect, the second side end of the board box and the first side end of the second speaker box overlap each other in the depth direction. Therefore, compared to a configuration in which the board box, the first speaker box, and the second speaker box are installed at intervals from each other, it is easier to ensure a sense of design unity (e.g., continuity in appearance) between the board box, the first speaker box, and the second speaker box. In addition, because the board box and the second speaker box are installed separately, it is easier to seal the space in which the second speaker unit is installed compared to a configuration in which the control board and the second speaker unit are housed in a single box, and the manufacturing costs of the keyboard instrument can be reduced compared to a configuration in which a large box is required to house the control board and the second speaker unit separately.

[0073] In a specific example (Aspect 3) of Aspect 2, the board box includes a box-shaped board accommodating section that accommodates the control board, a first lateral protrusion that protrudes from the first lateral side surface of the board accommodating section to the first side, and a second lateral protrusion that protrudes from the second lateral side surface of the board accommodating section to the second side, the first speaker box includes a box-shaped first speaker accommodating section that accommodates the first speaker unit, and a first protrusion that protrudes from the second lateral side surface of the first speaker accommodating section to the second side, the second speaker box includes a box-shaped second speaker accommodating section that accommodates the second speaker unit, and a second protrusion that protrudes from the first lateral side surface of the second speaker accommodating section to the first side, the first lateral protrusion and the first protrusion overlap each other in the depth direction, and the second lateral protrusion and the second protrusion overlap each other in the depth direction. In the above aspect, the board box includes a box-shaped board housing portion and first and second lateral protrusions protruding from the side surfaces of the board housing portion. Therefore, while the board housing portion has a simple box shape, it is possible for the first lateral protrusions and the first protrusions of the first speaker box to overlap in the depth direction, and for the second lateral protrusions and the second protrusions of the second speaker box to overlap in the depth direction. Furthermore, the first speaker box includes a box-shaped first speaker housing portion and a first protrusion protruding from a side surface on a second side of the first speaker housing portion. Therefore, while the first speaker housing portion has a simple box shape, it is possible for the first protrusions and the first lateral protrusions of the board box to overlap in the depth direction. Similarly, the second speaker box includes a box-shaped second speaker housing portion and a second protrusion protruding from a side surface on a first side of the second speaker housing portion. Therefore, while the second speaker enclosure has a simple box-like shape, the second protrusion and the second lateral protrusion of the board box can overlap in the depth direction.

[0074] In a specific example (Aspect 4) of Aspect 3, the first lateral protrusion of the board box is located forward of the first protrusion of the first speaker box, and the second lateral protrusion of the board box is located forward of the second protrusion of the second speaker box. In the above aspect, the first lateral protrusion of the board box is located forward of the first protrusion of the first speaker box, and the second lateral protrusion of the board box is located forward of the second protrusion of the second speaker box. Therefore, compared to, for example, a configuration in which the first lateral protrusion is located forward of the first protrusion and the second lateral protrusion is located rearward of the second protrusion, or a configuration in which the first lateral protrusion is located rearward of the first protrusion and the second lateral protrusion is located forward of the second protrusion, it is easier to ensure a sense of design unity between the board box, the first speaker box, and the second speaker box.

[0075] "Forward" means the direction toward the player from the perspective of the keyboard instrument, and can also be described as the front side of the keyboard instrument or the front side from the perspective of the player. "Backward" means the opposite direction from forward, and can also be described as the back side of the keyboard instrument or the far side from the perspective of the player.

[0076] In a specific example (Aspect 5) of any of Aspects 2 to 4, the front surface of the board accommodating portion, the front surface of the first lateral protrusion, and the front surface of the second lateral protrusion are located in the same plane. In the above aspects, since the front surface of the board accommodating portion, the front surface of the first lateral protrusion, and the front surface of the second lateral protrusion are located in the same plane, it is easier to maintain a sense of design unity in the board box compared to a configuration in which there is a step between the front surface of the board accommodating portion and the front surface of the first lateral protrusion, or a configuration in which there is a step between the front surface of the board accommodating portion and the front surface of the second lateral protrusion. With respect to elements that constitute a keyboard instrument, the "front surface" means the surface of the element that is located forward (the surface facing the player).

[0077] In a specific example (Aspect 6) of any of Aspects 1 to 5, the first speaker box and the second speaker box have the same shape. According to the above aspect, the same material can be used for the first speaker box and the second speaker box. Therefore, the manufacturing cost of the keyboard instrument can be reduced compared to an embodiment in which the first speaker box and the second speaker box have different shapes.

[0078] The "same" shape of the first speaker box and the second speaker box includes not only the case where the shape of the first speaker box and the shape of the second speaker box are completely the same, but also the case where the shape of the first speaker box and the shape of the second speaker box are substantially the same. The case where the shape of the first speaker box and the shape of the second speaker box are "substantially the same" is, for example, the case where the shape of the first speaker box and the shape of the second speaker box are different in the strict sense, but the difference is within the range of dimensional error, for example.

[0079] In a specific example (Aspect 7) of any of Aspects 1 to 6, the board box is disposed with a gap between it and each of the first speaker box and the second speaker box. In the above aspects, for example, during the process of installing or disassembling (removing) the board box, the board box can be moved to a first side by the gap relative to the first speaker box. Therefore, compared to a configuration in which the board box and the first speaker box are installed without a gap, the installation or disassembly work of the board box is easier. Similarly, for example, during the process of installing or disassembling the board box, the board box can be moved to a second side by the gap relative to the second speaker box. Therefore, compared to a configuration in which the board box and the second speaker box are installed without a gap, the installation or disassembly work of the board box is easier. [Explanation of symbols]

[0080] 100...keyboard instrument, 10...keyboard, 11...key, 20...support, 21...side wall member, 22...side wall member, 23...support member, 231...bottom surface, 24...back member, 25...lid member, 26...pedal, 31...detection device, 32...sound source device, 33...first speaker unit, 34...second speaker unit, 35...control board, 40...board box, 41...board accommodating section, 411...side surface, 412...side surface, 413...front surface, 414...back surface, 415...bottom surface, 42...first lateral protrusion, 421...front surface, 43...second lateral protrusion, 431...front surface, 44 ...fixing portion, 441...mounting hole, 50...first speaker box, 51...first speaker housing portion, 511...side surface, 512...side surface, 513...front surface, 514...rear surface, 515...bottom surface, 516...sound emission hole, 52...first protrusion portion, 53...first peripheral portion, 54...first fixing portion, 55...first sealing body, 60...second speaker box, 61...second speaker housing portion, 611...side surface, 612...side surface, 613...front surface, 614...rear surface, 615...bottom surface, 616...sound emission hole, 62...second protrusion portion, 63...second peripheral portion, 64...second fixing portion, 65...second sealing body.

Claims

1. A support member; a board box fixed to the support member and configured to accommodate a control board; a first speaker box that is fixed to the support member on a first side of the base box and that houses a first speaker unit that produces sound in response to an operation on a keyboard; Equipped with The first side end of the substrate box and the second side end of the first speaker box opposite to the first side end overlap each other in the depth direction. Keyboard instrument.

2. a second speaker box for accommodating a second speaker unit that produces sound in response to an operation on the keyboard, the second speaker box being fixed to the support member on the second side of the base box; Furthermore, The second side end of the substrate box and the first side end of the second speaker box overlap each other in the depth direction.

2. The keyboard instrument of claim 1.

3. The substrate box includes: a box-shaped board accommodating portion that accommodates the control board; a first lateral protrusion protruding from a side surface of the substrate accommodating portion on the first side toward the first side; a second lateral protrusion protruding from a side surface of the substrate accommodating portion on the second side toward the second side, The first speaker box comprises: a box-shaped first speaker housing that houses the first speaker unit; a first protrusion protruding from a side surface of the first speaker housing on the second side toward the second side, The second speaker box comprises: a box-shaped second speaker housing that houses the second speaker unit; a second protrusion protruding from a side surface of the second speaker housing on the first side toward the first side, the first lateral protrusion and the first protrusion overlap each other in the depth direction, The second lateral protrusion and the second protrusion overlap each other in the depth direction.

3. The keyboard instrument of claim 2.

4. the first lateral protrusion of the substrate box is located forward of the first protrusion of the first speaker box, The second lateral protrusion of the substrate box is located forward of the second protrusion of the second speaker box.

4. The keyboard instrument of claim 3.

5. The front surface of the substrate accommodating portion, the front surface of the first lateral protrusion, and the front surface of the second lateral protrusion are located in the same plane.

4. The keyboard instrument of claim 3.

6. The first speaker box and the second speaker box have the same shape.

4. The keyboard instrument of claim 3.

7. The substrate box is disposed with a gap between the first speaker box and the second speaker box.

4. The keyboard instrument of claim 3.

Images