Electronic keyboard machine

Abstract

To provide an electronic keyboard apparatus with which, while retaining the strength of constituent members, it is possible to obtain a good sound image.SOLUTION: An electronic keyboard musical instrument comprises a body case 30, a keyboard having a plurality of keys 22 installed exposed from the body case 30, a speaker 80 provided in the body case 30, and a plurality of first ribs 71 and second ribs 72 provided at positions corresponding to at least one of a plurality of keys 22 between the keyboard and the speaker 80. The plurality of first ribs 71 and second ribs 72 respectively have an opening as a support member opening 70A provided therebetween, and the body case 30 has therein a connection passage P leading from the speaker 80 to respective intervals between the plurality of keys 22 by way of the support member opening.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an electronic keyboard device. [Background technology]

[0002] Conventionally, electronic keyboard instruments have been known that provide a keystroke feel similar to that of a real piano by incorporating mass bodies such as hammer members. For example, Patent Document 1 discloses a keyboard structure for an electronic keyboard instrument that includes a board on which keys and mass bodies are mounted, and a frame that holds the board below the keys. In this keyboard structure, the frame has multiple reinforcing ribs that reinforce the frame itself. The multiple reinforcing ribs are formed between the white keys of the keyboard, preventing interference between the oscillating mass bodies and the reinforcing ribs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-17614 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electronic keyboard instrument disclosed in Patent Document 1, in which multiple ribs are provided below the keys and between the white keys to enhance the reinforcement effect, the multiple ribs can hinder sound leakage, making it difficult to secure a sufficient sound emission path from the speaker to the spaces between the keys within the housing (for example, below the keys or at the rear of the housing), which can result in a risk of not being able to obtain a good sound image.

[0005] An object of the present invention is to provide an electronic keyboard instrument that can obtain a good sound image while maintaining the strength of its constituent members. [Means for solving the problem]

[0006] The electronic keyboard instrument of the present invention comprises a housing, a keyboard having a plurality of keys exposed from the housing, a sound emitting member provided within the housing, and a plurality of ribs provided between the keyboard and the sound emitting member at positions corresponding to at least any of the plurality of keys, wherein at least a portion of the spaces between the plurality of ribs are open, and the housing has communication passages formed therein that run from the sound emitting member through the openings to the spaces between each of the plurality of keys. The housing includes a bottom plate that forms a bottom surface of the housing, and the communication passage includes an inclined surface that is provided in the opening and that forms an angle with the bottom plate as an elevation angle and that inclines from the rear of the housing to the front of the housing. . [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an electronic keyboard instrument that can obtain a good sound image while maintaining the strength of its constituent members. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an overall perspective view of an electronic keyboard instrument according to an embodiment, as seen from the front side; [Figure 2] 1 is a front view of a main body of an electronic keyboard instrument according to an embodiment. [Figure 3] 1 is a partial perspective view of a main body of an electronic keyboard instrument according to an embodiment. [Figure 4] 4 is a cross-sectional view of the main body of the electronic keyboard instrument according to the embodiment, taken along the line IV-IV in FIG. 2. FIG. [Figure 5] 5 is a perspective cross-sectional view of the main body of the electronic keyboard instrument according to the embodiment, the perspective cross-sectional view corresponding to FIG. 4. FIG. [Figure 6] 1 is a perspective view of the inside of a main body of an electronic keyboard instrument according to an embodiment, seen from below. [Figure 7] FIG. 2 is a partial perspective view of a support member of the electronic keyboard instrument according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described with reference to the drawings. The electronic keyboard instrument 1 shown in FIG. 1 comprises a main body 10 and a leg 100. As shown in FIGS. 1 and 2, the main body 10 comprises a keyboard 20 having a plurality of keys 22, such as white keys 22W and black keys 22B, and a main body case (housing) 30 that surrounds and holds the keyboard 20. The leg 100 comprises a pair of side panel members 110, a pedal frame 120, and a pedal device 130. In the following description, the arrangement direction of the plurality of keys 22 on the keyboard 20 will be referred to as the left-right direction (the left side in FIGS. 1 and 2 will be referred to as the leftward direction), the extension direction of each key 22 will be referred to as the front-rear direction (the front side in FIGS. 1 and 2 will be referred to as the frontward direction), and the up-down direction of the electronic keyboard instrument 1 will be referred to as the up-down direction (the upper side in FIGS. 1 and 2 will be referred to as the upward direction).

[0010] As shown in Fig. 1, the pair of side plate members 110 are plate-like members that are erected on the installation surface on both the left and right sides of the electronic keyboard instrument 1 with their plate surfaces facing left and right, and support the main body case 30. The pedal frame 120 connects the side plate members 110 below each other. The pedal device 130 is provided in approximately the center of the pedal frame 120 in the left and right direction. The configuration of the main body 10 will be described in detail below.

[0011] 1 to 4, when viewed from above, the main body case 30 has a horizontally elongated, generally rectangular shape with the left-right direction as the longitudinal direction, and includes thick plate-like members: a front panel 32, a rear panel 33, a left panel 34, a right panel 35, an upper panel 36, and a lower panel 37, and has a generally L-shaped vertical cross section (see FIG. 4). The front panel 32 has a generally rectangular shape that is long in the left-right direction, and is provided at the front lower portion of the main body 10 to form the front surface of the main body case 30. The rear panel 33 has a generally rectangular shape that is long in the left-right direction, and is provided at the rear of the main body 10 to form the rear surface of the main body case 30.

[0012] The left panel 34 and the right panel 35 are generally rectangular and elongated in the front-to-rear direction, and are provided on the left and right sides of the main body 10, respectively, constituting the left and right sides of the main body case 30. The top panel 36 is generally rectangular and elongated in the left-to-right direction, and is provided at the upper rear portion of the main body 10, constituting the top surface of the main body case 30. As shown in FIG. 1, a music stand 36a is attached to the approximate center of the top panel 36 in the left-to-right direction. Note that the music stand 36a is not shown in FIG. 2 and subsequent figures. The bottom panel 37 is generally rectangular and elongated in the left-to-right direction, and is provided below the main body 10, constituting the bottom surface of the main body case 30.

[0013] 4 and 5, substantially circular sound emission holes 37a that open in the vertical direction are provided in slightly rearward portions on both the left and right sides of the lower panel 37. Each sound emission hole 37a is divided into substantially semicircular portions in the front and rear by a part of the lower panel 37 (hereinafter referred to as a "dividing portion 37b"), with the front opening being a first sound emission hole 37a1 and the rear opening being a second sound emission hole 37a2. The opening size of the first sound emission hole 37a1 is slightly smaller than that of the second sound emission hole 37a2.

[0014] As shown in FIG. 3, the main body case 30 is open at the upper front, and portions of the top and front surfaces, which are the striking surfaces of each key 22 of the keyboard 20, are exposed to the outside through this opening. As shown in FIG. 4, the main body 10 is provided with a lid 38 that covers the exposed portions of the keyboard 20. The lid 38 is a thick plate-like member and is composed of a first lid plate 38a and a second lid plate 38b, which are substantially rectangular plate-like members that are elongated in the left-right direction. The first lid plate 38a and the second lid plate 38b are connected so as to be foldable in two, and are accommodated in and out of the main body 10 through an opening (hereinafter referred to as the upper opening 30a (see FIG. 4)) provided between the keyboard 20 and the top panel 36. When the electronic keyboard instrument 1 is powered off, the lid 38 is pulled out from inside the main body 10 to cover the opening of the main body case 30, thereby covering the exposed portions of the keyboard 20.

[0015] In the electronic keyboard instrument 1, the main body case 30 of the main body 10 and the side panel members 110 of the leg section 100 that are exposed to the outside are both made of wood, giving them a distinctive texture. As shown in Fig. 1, a power panel 42 on which a power button 42a and other buttons are arranged is provided between the keyboard 20 and the right side panel 35. Furthermore, a setting panel 44 on which a volume adjustment button 44a and other buttons are arranged is provided between the keyboard 20 and the left side panel 34.

[0016] As shown in FIGS. 3 to 5, an internal case 50 is provided inside the main body case 30. The internal case 50 is provided across substantially the entire area below the keyboard and has a horizontally elongated shape similar to the keyboard 20. The internal case 50 is a hollow member that opens downward. A substantially plate-shaped sheet metal member 46, with both plate surfaces facing the front-to-rear direction, is provided on the rear side of the internal case 50. A rear space BS is provided between the sheet metal member 46 and the rear panel 33. Furthermore, an internal space IS is provided inside the internal case 50, between the internal case 50 and the bottom panel 37. The sheet metal member 46 is provided above the dividing portion 37b of the bottom panel 37. Therefore, of the sound emission holes 37a, the first sound emission hole 37a1 communicates with the internal space IS, and the second sound emission hole 37a2 communicates with the rear space BS. The lid portion 38 described above is accommodated in the rear space BS.

[0017] The front end of the inner case 50 is a case-side convex portion 50a that protrudes upward. The portion of the inner case 50 located below the black keys of each key 22 is a case-side platform portion 50b that protrudes upward like a platform. Between the case-side convex portion 50a and the case-side platform portion 50b is a case-side recessed portion 50c that is recessed downward. The rear portion of the upper surface of the case-side platform portion 50b is provided with a pivot point portion 50b1 that rotatably supports the rear end portion of each key 22 on the keyboard 20. A control board 55 is also provided on the upper surface of the case-side platform portion 50b. The control board 55 is provided with a switch that generates a sound corresponding to the pressed key 22. The case-side recessed portion 50c is provided with multiple case-side openings 50c1 that open vertically and are aligned horizontally (see FIG. 5).

[0018] Each white key 22W of each key 22 has a hook-shaped white key restriction portion 22W1 extending downward from its front end, and this white key restriction portion 22W1 interferes with first cushions 51 provided above and below the front side of the case-side convex portion 50a, thereby restricting the upper and lower limit positions of the white key 22W. Also, each black key 22B of each key 22 has a black key restriction portion 22B1 extending downward from its front end, and this black key restriction portion 22B1 interferes with second cushions 52 provided above and below the front side of the case-side platform portion 50b, thereby restricting the upper and lower limit positions of the black key 22B.

[0019] Within the internal space IS, multiple hammer members 60 connected to each key 22 are provided inside the case-side platform portion 50b. For ease of explanation of the first sound emission holes 37a1, the first communication passage P1, and other features, some of the hammer members 60 are omitted from FIG. 4 . Each hammer member 60 includes a substantially triangular weight portion 61 and an arm portion 62 extending linearly forward from the weight portion 61. The arm portion 62 is rotatably supported by a pivot support member 54 located on the front side of the inside of the case-side platform portion 50b. When a key 22 is struck, the weight portion 61 of the hammer member 60 rises, adding weight to each key 22 when struck. This provides a keystroke sensation similar to that of a real piano.

[0020] A support member 70 is provided on the bottom plate 37 in the front portion of the internal space IS. The support member 70 is attached to the main case 30 by being screwed to the bottom plate. The support member 70 indirectly supports the keyboard 20 via the internal case 50 relative to the wooden main case 30. The pivot support members 54 that support the arms 62 of the hammer members 60 are provided on the support member 70. The configuration of the support member 70 will be described in detail later.

[0021] 2 and 4, the electronic keyboard instrument 1 is provided with two speakers (sound emission devices) 80 at the bottom of the main body case 30. Each speaker 80 is attached by screws to the underside of the lower panel 37, with the sound-emitting side of the cone 80a facing upward, so as to correspond to a respective sound emission hole 37a provided in the lower panel 37. Each speaker 80 is also provided in a position between each key 22 so as not to overlap in the vertical direction with the tip-side portion of each key 22. The size of the cone 80a is approximately the same as the size of each sound emission hole 37a, so that sound emitted from each speaker 80 is transmitted through the first sound emission hole 37a1 to the internal space IS and through the second sound emission hole 37a2 to the rear space BS.

[0022] As described above, the internal space IS is provided with various components such as the keyboard 20, the internal case 50, the control board 55, the hammer members 60, and the support members 70. Of the sounds emitted from the speakers 80, those that are transmitted to the internal space IS pass between the support members 70 and the internal case 50 and are emitted to the player from the gaps between the keys 22. That is, the internal space IS is provided with communication paths P (see FIG. 5) through which sounds are propagated from the speakers 80 through the first sound emission holes 37a1 to the gaps between the keys 22.

[0023] Meanwhile, sounds emitted from the speakers 80 that are transmitted to the rear space BS pass through the rear space BS that houses the lid portion 38 and are emitted toward the performer from the upper opening 30a. That is, the rear space BS is provided with a rear communication passage (another communication passage) BP (see FIG. 5) through which sound is propagated from each speaker 80 to the upper opening 30a (above the keyboard 20) through the second sound emission holes 37a2. The rear communication passage BP is provided at a position that does not overlap with the keyboard 20 in the vertical direction. The rear communication passage BP also includes a path that passes from the second sound emission holes 37a2 to a crescent-shaped notch provided in the sheet metal member 46 and exits upward.

[0024] Next, the communication passages P provided in the internal space IS will be described in detail. As shown in Figure 5, in this embodiment, the communication passages P include first communication passages P1 that run from the first sound emission holes 37a1, pass under each hammer member 60, pass between the lower panel 37 and the internal case 50, and reach a plurality of support member openings (openings) 70A (see Figure 4) provided inside the support member 70, and second communication passages P2 that run from the support member openings 70A to the upper side of the support member 70, and further pass to the upper side of the internal case 50 to reach between each key 22.

[0025] Here, the configurations of the support member 70 and the support member opening 70A will be described with reference to FIGS. 4 to 7. As shown in FIG. 7, the support member 70 has a horizontally elongated shape and is provided inside the inner case 50. The support member 70 is a hollow member that is open downward. The front end of the support member 70 is a support-side convex portion 70a that protrudes upward in a convex shape and is located below the case-side convex portion 50a. The rear end of the support member 70 is a support-side platform portion 70b that protrudes upward in a platform shape and is located below and toward the front of the case-side platform portion 50b. Between the support-side convex portion 70a and the support-side platform portion 70b is a support-side concave portion 70c that is concave downward and is located below the case-side concave portion 50c.

[0026] As shown in Figure 6, a plurality of first reinforcing ribs (ribs) 71 extending along the front-rear direction are provided at approximately equal intervals in the left-right direction across substantially the entire underside of the support-side convex portion 70a. A plurality of second reinforcing ribs (ribs) 72 extending along the front-rear direction are provided at approximately equal intervals in the left-right direction across substantially the entire underside of the support-side concave portion 70c. Each of the first ribs 71 and each of the second ribs 72 is provided at a position corresponding to each key 22, specifically, directly below each key 22, and extends approximately vertically. Therefore, the first ribs 71 and each of the second ribs 72 support substantially the entire keyboard 20 evenly via the inner case 50.

[0027] The hammer members 60, which are provided below the support-side platform portion 70b, are provided behind the support-side convex portion 70a. The first ribs 71 and second ribs 72 are provided at positions corresponding to the hammer members 60. Specifically, the first ribs 71 and second ribs 72 are provided on the same straight line as the hammer members 60 in the front-to-rear direction, and the center position of each hammer member 60 in the left-to-right direction coincides with the first rib 71 and second rib 72.

[0028] The support member openings 70A are communication passages provided inside the support member 70, passing from the rear end 70d of the support member 70 between the first ribs 71 to the upper side of the support-side recessed portion 70c. Specifically, as shown in FIGS. 4 and 6, a plurality of first openings 70b1, each having a generally arch shape and opening in the front-rear direction, are provided between the first ribs 71 at the rear end 70d of the support member 70 (the rear end of the support-side platform portion 70b). Furthermore, a plurality of second openings 70b2, each having a generally rectangular shape and opening in the front-rear direction, are provided between the first ribs 71 at the front end of the support-side platform portion 70b. The first openings 70b1 and the second openings 70b2 are positioned on the same straight line along the lower panel 37.

[0029] Meanwhile, a plurality of generally rectangular third openings 70c1 that open in the vertical direction are provided in the support-side recessed portion 70c near the support-side platform portion 70b and between the second ribs 72. Each third opening 70c1 is provided at a position corresponding to each case-side opening 50c1 in the vertical direction, i.e., at a position that overlaps with each case-side opening 50c1 in the vertical direction.

[0030] Below each third opening 70c1, an inclined surface 70c2 is provided, sloping from the corresponding second opening 70b2 to the corresponding third opening 70c1. Each inclined surface 70c2 is inclined so that sound is reflected from the horizontal upper surface of the lower panel 37 toward the spaces between the keys 22, i.e., toward the player. In other words, the inclination angle of the inclined surface 70c2 is such that the spaces between the keys 22 are located on imaginary line L, which indicates the trajectory of the sound reflected by the inclined surface 70c2. Specifically, the inclination angle of the inclined surface 70c2 is preferably approximately 45° to 60°. By setting the inclined surface 70c2 at this angle, sound reflected by the inclined surface 70c2 reaches the spaces between the keys 22 without interfering with other components.

[0031] As described above, each support member opening 70A serves as a communication passage that passes from the first opening 70b1 through the inside of the support-side platform portion 70b, passes through the second opening 70b2, passes through the inclined surface 70c2, and reaches the third opening 70c1. Therefore, each support member opening 70A serves as a passage that penetrates the support member 70 from the internal space IS side to the space below the multiple keys 22.

[0032] Returning to the configuration of the communication passage P, the second communication passage P2 passes through the third opening 70c1 of the support member opening 70A, then passes through the case-side opening 50c1, communicates with the upper side of the inner case 50, and leads to the spaces between the keys 22. In this way, the communication passage P, which includes the first communication passage P1 and the second communication passage P2, is not provided with any walls or the like that would block sound, and is a continuous passage that communicates from the first sound emission hole 37a1 to the spaces between the keys 22, providing a path that effectively propagates sound.

[0033] As described above, the electronic keyboard instrument 1 of this embodiment comprises a main body case 30, a keyboard 20 having a plurality of keys 22 exposed from the main body case 30, a speaker 80 provided within the main body case 30, and a plurality of first ribs 71 and second ribs 72 provided between the keyboard 20 and the speaker 80 at positions corresponding to at least some of the plurality of keys 22, with the spaces between the plurality of first ribs 71 and second ribs 72 each being open by the provision of a support member opening 70A, and a communication passage P within the main body case 30 extending from the speaker 80 via the support member opening 70A to each space between the plurality of keys 22.

[0034] In the electronic keyboard instrument 1 of this embodiment configured as described above, sound emitted from the speaker 80 toward the support member opening 70A passes through the support member openings 70A provided between the first ribs 71 and the second ribs 72, passes through the communication passage P, and is propagated between the keys 22, i.e., toward the player, without being obstructed by walls or the like. Therefore, while realizing a configuration in which the keyboard 20 is supported evenly by the first ribs 71 and the second ribs 72 provided at positions corresponding to each of the multiple keys 22, a sound emission path from the speaker 80 toward the player can be secured, thereby ensuring an efficient sound-emission structure. As a result, the electronic keyboard instrument 1 of this embodiment can produce a good sound image while maintaining the strength of its constituent components.

[0035] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the communication path P includes a first communication path P1 that runs from the speaker 80 to the support member opening 70A, and a second communication path P2 that runs from the support member opening 70A to the spaces between the multiple keys 22. With this configuration, for example, the path from the speaker 80 through the space below the keyboard 20 to the support member opening 70A can be defined as the first communication path P1, and the path that runs through the interior of the member in which the first ribs 71 and the second ribs 72 are provided to the spaces between the multiple keys 22 can be defined as the second communication path P2. In this way, a specific configuration for the communication path P can be provided.

[0036] Furthermore, the electronic keyboard instrument 1 according to this embodiment includes hammer members 60 corresponding to each of the multiple keys 22, and each of the first ribs 71 and each of the second ribs 72 is provided at a position corresponding to each of the hammer members 60. This allows part of the communication path P to be a path passing between the hammer members 60, providing a specific configuration in which the communication path P is not obstructed by walls or the like. Furthermore, by having each of the first ribs 71 and each of the second ribs 72 correspond to each of the hammer members 60, the reinforcing structure of each key 22 on the keyboard 20 can be made uniform. Furthermore, by adjusting the first ribs 71 and second ribs 72 corresponding to each key 22 according to the keystroke conditions of each key 22, the reinforcing structure can be adjusted for each key 22.

[0037] Furthermore, the electronic keyboard instrument 1 according to this embodiment is provided with a support member 70 that is provided below the keyboard 20 and supports the keyboard 20, and the first ribs 71 and the second ribs 72 are provided on the support member 70. This allows the support member 70 to be reinforced by the first ribs 71 and the second ribs 72, and a configuration can be realized in which the support member 70 effectively supports the keyboard 20.

[0038] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, each of the plurality of first ribs 71 and second ribs 72 is provided substantially vertically at a position corresponding to at least one of the plurality of keys 22. This allows the sound passing through the communication passage P to propagate linearly, ensuring an even more efficient sound-emission structure.

[0039] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the communication path P includes an inclined surface 70c2 that slopes from the horizontal surface of the lower panel 37 toward the spaces between the multiple keys 22. By providing an inclined surface 70c2 in part of the communication path P in this manner, it is possible to provide a specific configuration for realizing a communication path P that extends from the speaker 80 provided on the lower side of the main body case 30 to the player's side, i.e., the upper side of the main body case 30. Furthermore, by providing such an inclined surface 70c2, it is possible to realize a communication path P that transmits sound more efficiently, with less sound reflection, compared to a communication path that curves approximately vertically.

[0040] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the inclined surface 70c2 is set at an angle such that the spaces between the keys 22 are located on an imaginary line L along the inclined surface 70c2. This makes it possible to provide a specific angle of inclination for the inclined surface 70c2 to realize a communication path P extending from the speaker 80 toward the player.

[0041] Furthermore, in the electronic keyboard instrument 1 according to this embodiment, the speaker 80 and the portions of the spaces between the keys 22 that are located on the imaginary line L are positioned so as not to overlap vertically in a cross-sectional view of the electronic keyboard instrument 1. With this configuration, a space in which the hammer members 60 that impart weight to each key 22 are provided can be provided above the speaker 80, and communication passages P that lead from the speaker 80 to the spaces between each key 22 can be efficiently provided inside the main body case 30.

[0042] Furthermore, the electronic keyboard instrument 1 according to this embodiment has a rearward communication passage BP within the main body case 30 that extends from the speaker 80 to the upper side of the keyboard 20 via a passage that does not overlap the keyboard 20 in a cross-sectional view of the electronic keyboard instrument 1. With this configuration, sound is not only transmitted to the player via the communication passage P, but also from the speaker 80 via the rearward communication passage BP. This allows sound to be emitted from both the upper and lower sides of the keyboard 20, resulting in an electronic keyboard instrument 1 in which sound from the speaker 80 is effectively transmitted to the player. Furthermore, by emitting sound from both the upper and lower sides of the keyboard 20, the sound pressure transmitted to the player can be increased regardless of the player's sitting height, compared to a configuration in which the sound is transmitted via only one of the communication passages P and the rearward communication passage BP. Furthermore, the player can feel as if sound is being produced from the entire electronic keyboard instrument 1.

[0043] The above-described embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0044] 1 Electronic keyboard instrument 10 Main unit 20 keys 22 keys 22B Black key 22B1 Black key regulation section 22W White Key 22W1 White Key Restriction Section 30 Main body case 30a Upper opening 32 Front plate 33 Rear plate 34 Left side plate 35 Right side plate 36 Top panel 36a Music stand 37 Bottom plate 37a Sound emission hole 37a1 1st sound emission hole 37a2 2nd sound emission hole 37b Split section 38 Lid section 38a First cover plate part 38b Second cover plate part 42 Power panel 42a Power button 44 Setting panel section 44a Volume setting button 46 Sheet metal member 50 Inner case 50a Case side convex portion 50b Case side pedestal portion 50b1 Pivot fulcrum 50c Case side concave portion 50c1 Case side opening 51 First cushion 52 second cushion 54 pivot support member 55 Control board 60 Hammer component 61 Weight part 62 Arm part 70 Support member 70A Support member opening 70a Support side convex part 70b Support side platform part 70b1 1st opening 70b2 2nd opening 70c Support side concave part 70c1 3rd opening 70c2 Inclined surface 70d Rear end 71 1st rib 72 2nd rib 80 speaker 80a cone 100 Leg portion 110 Side plate member 120 Pedal frame 130 Pedal device BP Rear communication path BS Rear space IS Interior space L Virtual line P Communication path P1 1st communication path P2 2nd communication passage

Claims

1. The housing and a keyboard having a plurality of keys exposed from the housing; a sound emitting member provided in the housing; a plurality of ribs provided between the keyboard and the sound emitting member at positions corresponding to at least any of the plurality of keys, At least a portion of the spaces between the plurality of ribs is open, The housing has a communication passageway extending from the sound emitting member through the opening to the spaces between the plurality of keys, the housing includes a bottom plate that forms a bottom surface of the housing, the communication passage includes an inclined surface provided within the opening, the inclined surface inclining from the rear of the housing to the front of the housing, the inclined surface forming an elevation angle with the lower surface plate; Electronic keyboard instrument.

2. The communication passage includes a first communication passage extending from the sound emitting member to the opening, and a second communication passage extending from the opening to the spaces between the keys.

2. The electronic keyboard instrument according to claim 1.

3. The sound emitting member is provided below the lower panel, The first communication passage is formed along an upper side of the lower plate.

3. The electronic keyboard instrument according to claim 2.

4. a hammer member corresponding to each of the plurality of keys; The plurality of ribs are provided at positions corresponding to at least any of the hammer members, respectively.

2. The electronic keyboard instrument according to claim 1.

5. a support member provided below the keyboard and on an upper surface of the lower panel, the support member supporting the keyboard; The plurality of ribs are provided on the support member.

2. The electronic keyboard instrument according to claim 1.

6. Each of the plurality of ribs is provided substantially vertically at a position on the support member corresponding to at least one of the plurality of keys.

6. The electronic musical instrument according to claim 5.

7. the inclination angle of the inclined surface is set to an angle such that the space between the keys is located on the trajectory of at least a portion of the sound reflected by the inclined surface; 2. The electronic keyboard instrument according to claim 1.

8. The inclined surfaces are provided on the support member and are provided between the plurality of ribs.

6. The electronic keyboard instrument according to claim 5.

9. the sound emitting member and the key tip side portion of the key gap are provided at positions where they do not overlap each other vertically in a cross-sectional view of the electronic keyboard instrument.

2. The electronic keyboard instrument according to claim 1.

10. In the housing, another communication passage is formed that communicates from the sound emitting member to a position rearward of the rear portion of the key and to an upper surface side of the keyboard.

10. The electronic keyboard instrument according to claim 9.

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