Electronic keyboard musical instrument

Abstract

To provide an electronic keyboard musical instrument that improves sound quality while reducing case size by bringing a speaker and keyboard closer together.SOLUTION: An electronic keyboard musical instrument 10 comprises: a case 200 equipped with a keyboard 50 provided on a performer's side of the electronic keyboard musical instrument 10, a rear panel 212 provided with a first sound emission hole 71, an upper panel 211 connected to the rear panel 212, and a keyboard arrangement section 60 corresponding to the keyboard 50; the keyboard 50 arranged in the keyboard arrangement section 60; a speaker 75 arranged corresponding to the first sound emission hole 71; and a magnetic isolation member 100 including a magnetic isolation material fixed over the top panel 211 and the back panel 212 and disposed between the keyboard 50 and the speaker 75.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] Conventionally, electronic keyboard instruments have been provided that provide a feeling of keystrokes similar to that of a real piano by providing a hammer member and a counterweight. The hammer member and the like may be made of iron-based materials. In this case, the magnetic force of the magnet provided in the speaker may affect the operation of the hammer member and the like, which may affect the feeling of keystrokes. Patent Document 1 discloses an electronic keyboard instrument in which a magnetic shielding sheet is provided between a speaker provided on the top panel of the case and a hammer member arranged corresponding to the white and black keys of the keyboard. This magnetic shielding sheet reduces the influence of the magnetic force of the magnet in the speaker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-3562 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional electronic keyboard instruments, the speaker and the hammer members of the keyboard can be placed close to each other, which allows the case to be made compact. However, by making the case compact, the vibrations from the speaker can easily affect the entire case, which can cause buzzing noises and other problems that can adversely affect the sound quality.

[0005] An object of the present invention is to provide an electronic keyboard instrument in which the speaker and the keyboard are placed close to each other, making the case smaller while improving sound quality. [Means for solving the problem]

[0006] The electronic keyboard instrument of the present invention comprises a keyboard provided on the player's side of the electronic keyboard instrument, a rear panel with a first sound emission hole portion, an upper panel connected to the rear panel, and a case comprising a keyboard arrangement portion corresponding to the keyboard, a sound emission portion arranged corresponding to the first sound emission hole portion, and a magnetic shielding member fixed across the upper panel and the rear panel and including a magnetic shielding material and arranged between the keyboard and the sound emission portion. Effect of the Invention

[0007] According to the present invention, it is possible to provide an electronic keyboard instrument in which the speaker and the keyboard are placed close to each other, thereby making the case more compact and improving the sound quality. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of an electronic keyboard instrument according to an embodiment of the present invention, as viewed from the front. [Diagram 2] 1 is a perspective view of an electronic keyboard instrument according to an embodiment of the present invention, as viewed from the rear. [Diagram 3] FIG. 2 is an exploded perspective view of the rear panel of the electronic keyboard instrument according to the embodiment of the present invention, as viewed from the rear side. [Figure 4] 4 is a cross-sectional view of the electronic keyboard instrument according to the embodiment of the present invention taken along line IV-IV in FIG. [Diagram 5] FIG. 2 is an enlarged front view of a main portion showing an upper case portion of the electronic keyboard instrument according to the embodiment of the present invention. [Figure 6] FIG. 2 is an enlarged perspective view of a main portion showing an upper case portion of the electronic keyboard instrument according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The electronic keyboard instrument 10 shown in FIG. 1 includes a full-size (88 keys) keyboard 50 with a plurality of white keys 30 and a plurality of black keys 40 as a plurality of keys, and a case 200. The keyboard 50 is provided on the player's side (front side) of the electronic keyboard instrument 10. In the following description, the front of the keys in the front-rear direction FB of the keyboard 50 is the front side F, the rear of the keys in the front-rear direction FB is the rear side B, the left side as viewed from the front of the keyboard 50 is the left side L, and the right side is the right side R. The keys of the keyboard 50 are arranged in the left-right direction LR. In addition, the top of the electronic keyboard instrument 10 in the vertical direction UL is the top side Up, and the bottom side Lo.

[0010] As shown in Fig. 1 and Fig. 2, the case 200 has an upper case 210, a lower case 220, a left side case 230 and a right side case 240 as side cases, and a front case 250. The upper case 210 has a top panel 211 and a rear panel 212, has a substantially L-shaped vertical section (see Fig. 4), and is formed in an elongated shape in the left-right direction LR. The left side case 230 and the right side case 240, which are substantially rectangular box-shaped and long in the front-rear direction FB, are provided at the left and right ends of the upper case 210 and the front case 250, respectively. The lower case 220 is provided on the lower side Lo of the upper case 210 and the side cases (the left side case 230 and the right side case 240).

[0011] The front side F of the upper case 210, between the left side case 230 and the right side case 240, is a keyboard arrangement section 60 corresponding to the keyboard 50 where the keyboard 50 is arranged. A substantially plate-shaped front case 250 that is long in the left-right direction is provided between the left side case 230 and the right side case 240 on the front side F of the keyboard 50.

[0012] A rotary knob 12 for adjusting the volume is provided on the top panel 211 of the upper case 210. An operation unit 14 having a pitch bender, push buttons, etc. is provided on the top surface of the left side case 230. An earphone jack 18 is provided on the front surface of the left side case 230. As shown in FIG. 2, a plug panel 260 to which various plugs are connected is provided in the lower center of the rear side of the electronic keyboard instrument 10. Also, stay insertion holes 265 for setting up a music stand are provided on the upper sides Up on both the left and right sides of the plug panel 260.

[0013] As shown in FIG. 3, the rear panel 212 of the upper case 210 is provided with a frame member 212a and rear panel bodies 212b arranged on the left and right. Each rear panel body 212b is formed in a substantially rectangular plate shape long in the left-right direction LR, and two first sound emission hole sections 71 are provided on the left and right sides of the plug panel 260. The first sound emission hole sections 71 are provided with a plurality of holes arranged in a substantially honeycomb shape. The frame member 212a is formed in a substantially plate shape long in the left-right direction. The frame member 212a is provided with an elliptical opening 212a1 with a major axis in the left-right direction so that each first sound emission hole section 71 is exposed, a notch 212a2 for exposing the plug panel 260, and an opening 212a3 for exposing the stay insertion hole 265. The frame member 212a is covered with a saran net 212c.

[0014] As shown in FIG. 4, the upper panel 211 of the upper case 210 has an upper panel main body 211a and an upper panel member 211b. The upper panel main body 211a has a vertical wall portion 211a1 that is provided with a front end portion that hangs down near the rear end of the keyboard 50. The vertical wall portion 211a1 is provided with a second sound emission hole portion 72. As shown in FIG. 1, the second sound emission hole portion 72 is provided at a total of four places, two places on the right side and two places on the left side, and is provided on the keyboard 50 side so as to emit sound directly above the keys of the keyboard 50. Also, as shown in FIG. 3, a rear wall portion 211a2 that hangs down along the back surface is provided on the rear side B of the upper panel main body 211a in a substantially central portion between the left and right rear panel main bodies 212b. As shown in FIG. 6, a plurality of mounting plates 211a3 are provided hanging down from the upper panel main body 211a, and a plurality of mounting plates 212b1 are provided forward from the rear panel 212b. The rear panel 212b and the upper panel main body 211a are fixed to the mounting plates 211a3 and 212b1 by a plurality of screws. In this manner, the upper panel 211 is connected to the rear panel 212.

[0015] As shown in Fig. 4, an inner case 25 is provided inside the case 200. The white and black keys 30 and 40 are rotatably supported at their rear ends by a rotation fulcrum 25c provided in the inner case 25 (Fig. 4 shows the rotation fulcrum 25c that rotatably supports the black key 40). The white key 30 is provided with a hook-shaped restriction portion 31 extending from the tip of the white key 30 toward the lower side Lo, and the upper and lower limit positions are restricted by upper and lower cushions 25d, 25e provided on the front side F of the inner case 25.

[0016] A plurality of hammer members 80 are provided inside the internal case 25, which are connected to each of the white keys 30 and each of the black keys 40. The hammer members 80 include a substantially triangular weight portion 81 and an arm portion 82 extending from the weight portion 81 to the front side F. The arm portion 82 is pivotally supported on the rotation fulcrum portion 25f of the internal case 25. The tip portions of the arm portion 82 are connected to hammer pressing portions provided on the white keys 30 and black keys 40 (hammer pressing portion 41 of the black key 40 is shown in FIG. 4).

[0017] When the white keys 30 and black keys 40 are struck, the weight portion 81 of the hammer member 80 rises, and weight is added to the striking of the white keys 30 and black keys 40. This provides a striking sensation similar to that of a real piano. The inner case 25 is provided with cushion members 25a, 25b on the upper and lower sides of the weight portion 81, which come into contact with the weight portion 81 at its upper and lower limit positions.

[0018] A board 91 is provided on the top surface of the internal case 25, and a switch 90 is provided on the board 91. The switch 90 is provided to correspond to each of the white keys 30 and black keys 40. When a white key 30 or black key 40 is struck, the switch 90 is pressed by the switch pressing portions 32, 42 provided on the white key 30 or black key 40, and a note of the scale corresponding to the struck white key 30 or black key 40 is generated.

[0019] Here, the keyboard 50 includes white keys 30 and black keys 40 , an inner case 25 and a hammer member 80 that is attached to and supported by the inner case 25 and operates in conjunction with striking the white keys 30 and black keys 40 .

[0020] 4 to 6, a speaker 75 serving as a sound emitting part (sound emitting device) is provided in the rear panel main body 212b of the rear panel 212, corresponding to the first sound emitting hole portion 71. The speaker 75 is fixed with screws 15 to the inside of the rear panel main body 212b (the surface on the front side F of the rear panel main body 212b) with a cone 75a facing the first sound emitting hole portion 71.

[0021] A magnetic shielding member 100 is provided inside the case 200 on the front side F of the speaker 75 and on the rear side B of the keyboard 50 (in other words, between the speaker 75 and the keyboard 50). The magnetic shielding member 100 is formed by sheet metal processing using a steel plate, which is a magnetic shielding material. As shown in Figs. 4 and 5, the magnetic shielding member 100 is disposed with the plate surface of the plate-shaped main body portion 101, which is a plate-shaped main body part, facing in the front-rear direction FB. A bulging portion 101a that bulges out toward the front side F is provided at approximately the center of the plate-shaped main body portion 101 in accordance with the shape of the center of the speaker 75.

[0022] The magnetic shielding member 100 has two upper mounting portions 102 and two lower mounting portions 104. The upper mounting portions 102 extend in a bifurcated shape from the upper side Up of the plate-shaped main body portion 101, and are bent toward the front side F to be approximately parallel to the upper panel 211. The upper mounting portions 102 are provided with screw holes and are fixed to the upper panel main body 211a of the upper panel 211 with screws 16. Between the two upper mounting portions 102, a convex arc-shaped edge portion 103 is formed to match the magnet 75b and yoke 75c of the speaker 75, which have convex arc-shaped outer shapes.

[0023] The lower attachment portion 104 is formed by bending at a right angle from the lower side Lo of the plate-shaped main body portion 101 in a bifurcated shape, extending to the rear side B, and bending again so that the plate surface faces in the front-rear direction FB. The lower attachment portion 104 has screw holes formed in the plate surface facing the front-rear direction FB, and is fixed to the rear panel main body 212b of the rear panel 212 with screws 17. Thus, the magnetic shielding member 100 is fixed across the top panel 211 and rear panel 212 of the upper case 210, and supports and reinforces movement of the top panel 211 and rear panel 212, which are arranged to intersect at a substantially right angle, in the approaching direction.

[0024] The magnetic shielding member 100 is provided with a lower cover 110, which is a separate member, on approximately the lower Lo half of the plate-shaped main body 101. The lower cover 110 is also formed by sheet metal processing using a steel plate, which is a magnetic shielding material. The lower end of the lower cover 110 is bent at a right angle toward the rear side B to provide a closed portion 111 that covers up to just below the magnet 75b.

[0025] By making the lower cover 110 a separate body, the portion close to the hammer member 80 is doubled in the plate thickness direction by the plate-shaped main body 101 and the lower cover 110, improving the magnetic shielding effect. Note that, although the plate-shaped main body 101 and the lower cover 110 of the magnetic shielding member 100 are separate bodies, they may also be formed integrally.

[0026] In this way, the magnetic shielding member 100 is provided so as to cover the magnet 75b of the speaker 75. Here, the upper side Up of the convex arc-shaped edge portion 103 on the upper side Up of the plate-shaped main body 101 forms an opening 120 through which the upper side of the magnet 75b is exposed. In addition, the left and right side surfaces of the plate-shaped main body 101 are open, forming open portions 130 that do not cover the magnet 75b.

[0027] Sound from the speaker 75 is emitted to the rear side B of the electronic keyboard instrument 10 through the first sound emission hole portion 71, and a portion of the sound is emitted to the front side F from the opening portion 120. Sound from the opening portion 120 is emitted to the player side (front side) through the second sound emission hole portion 72. In addition, by providing the open portion 130, echoes of sound between the back surface of the speaker 75 and the magnetic shielding member 100 are reduced.

[0028] As described above, in the embodiment of the present invention, the electronic keyboard instrument 10 comprises a keyboard 50 provided on the player's side of the electronic keyboard instrument 10, a rear panel 212 with a first sound emission hole portion 71, an upper panel 211 connected to the rear panel, and a case 200 with a keyboard arrangement portion 60 corresponding to the keyboard 50, a speaker 75 which is a sound emission portion arranged corresponding to the first sound emission hole portion 71, and a magnetic shielding member 100 which is fixed across the upper panel 211 and the rear panel 212 and is arranged between the keyboard 50 and the speaker 75 with the plate surface facing in the front-to-rear direction FB and contains a magnetic shielding material.

[0029] As a result, even if the speaker 75 and the keyboard 50 are placed close to each other to make the case 200 small, the influence of the magnets 75b of the speaker 75 on the iron members such as the hammer members 80 and counterweights of the keyboard 50 is reduced, while the top panel 211 and the back panel 212 are supported and reinforced, reducing rattling sounds generated from the top panel 211 and the back panel 212. Therefore, the sound quality can be improved while keeping the electronic keyboard instrument 10 small.

[0030] Additionally, the top panel 211 is provided with second sound emission hole sections 72 that emit sound toward the performer, and the magnetic shielding member 100 has an opening 120 that corresponds to the second sound emission hole section 72. As a result, in addition to the first sound emission hole section 71 that emits sound toward the audience, the second sound emission hole section 72 that is easy for the performer to hear is provided, and sound is emitted from this second sound emission hole section 72 via the opening 120 of the magnetic shielding member 100, so that the performer can clearly hear the sound of his or her own playing even when the magnetic shielding member 100 is provided.

[0031] In this embodiment, the second sound emission hole portion 72 is provided in the vertical wall portion 211a1 directly above the rear side B of the keyboard 50, but it can also be provided in another location on the upper panel 211 to emit sound toward the player. In other words, the second sound emission hole portion 72 can also be provided facing the player side (the keyboard 50 side), such as diagonally upward and forward.

[0032] Moreover, the second sound emission hole portion 72 emits sound toward the keyboard 50. This allows the second sound emission hole portion 72 to be provided in the vertical wall portion 211a1, which is a location that is less noticeable, thereby improving the design of the electronic keyboard instrument 10.

[0033] In addition, the opening 120 is provided in an arc shape. This allows sound to be emitted to the second sound emission hole portion 72 while providing good magnetic shielding against the magnet 75b provided in an annular shape.

[0034] Furthermore, the magnetic shielding member 100 is provided with openings 130 in the left-right directions LR, thereby reducing the effect of the magnetic shielding member 100 on sound.

[0035] Additionally, keyboard 50 includes hammer member 80. As a result, the influence of magnet 75b of speaker 75 on the operation of hammer member 80 is reduced by magnetic shielding member 100, while upper panel 211 and rear panel 212 can be held and reinforced.

[0036] Further, the magnetic shielding member 100 has a closed portion 111 on the lower side thereof. This makes it possible to reduce the influence of the magnetic force of the magnet 75b from the lower side of the magnetic shielding member 100.

[0037] Furthermore, in this embodiment, the device is provided with a magnetic shielding member 100 including a magnetic shielding material that is fixed across the top panel 211 and the rear panel 212 on which the sound emitting section 75 is arranged, but the device may also be configured to be fixed across the top panel 211 and the left side case 230 or right side case 240 on which the sound emitting section 75 is arranged, or may be configured to be fixed across the bottom case 220 and the rear panel 212 on which the sound emitting section 75 is arranged.

[0038] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims.

[0039] The invention described in the first claim of this application is set forth below. [1] A case including a keyboard provided on a player's side of an electronic keyboard instrument, a rear panel having a first sound output hole, a top panel connected to the rear panel, and a keyboard arrangement section corresponding to the keyboard; A keyboard arranged in the keyboard arrangement section; a sound emitting portion disposed corresponding to the first sound emitting hole portion; a magnetic shielding member that is fixed across the top panel and the rear panel and that includes a magnetic shielding material and is disposed between the keyboard and the sound output unit; An electronic keyboard instrument comprising: [2] The top panel has a second sound emission hole portion for emitting sound toward the player, The electronic keyboard instrument according to [1], wherein the magnetic shielding member has an opening corresponding to the second sound emission hole portion. [3] The electronic keyboard instrument described in [2], wherein the second sound emission hole portion emits sound toward the keyboard. [4] The electronic keyboard instrument according to [2] or [3], wherein the opening is formed in an arc shape. [5] An electronic keyboard instrument as described in any one of [1] to [4], wherein the magnetic shielding member has an open portion in the left-right direction. [6] The electronic keyboard instrument according to any one of [1] to [5], wherein the keyboard is provided with a hammer member. [7] An electronic keyboard instrument as described in any one of [1] to [6], wherein the magnetic shielding member has a non-open portion on the underside. [Explanation of symbols]

[0040] 10 Electronic Keyboard Instruments 12 Knobs 14 Operation unit 15 Screw 16 Screw 17 Screw 18 Earphone jack 25 Inner case 25a Cushion member 25b Cushion member 25c Pivot fulcrum 25d Cushion 25e Cushion 25f Pivot fulcrum 30 White keys 31 Restriction section 32 Switch pressing part 40 Black key 41 Hammer pressing portion 42 Switch pressing portion 50 Keyboard 60 Keyboard layout area 71 1st sound emission hole section 72 2nd sound emission hole section 75 speaker 75a cone 75b magnet 75c yoke 80 Hammer member 81 Weight portion 82 Arm section 90 Switch 91 Substrate 100 Magnetic shielding member 101 Plate-shaped main body part 101a Swelling part 102 Upper mounting portion 103 Edge portion 104 Lower mounting portion 110 Lower cover 111 Non-opening area 120 Opening area 130 Opening 200 Case 210 Upper case 211 Top panel 211a Upper panel body 211a1 Vertical wall portion 211a2 Rear wall 211a3 Mounting plate 211b Top panel member 212 Rear panel 212a Frame member 212a1 Opening 212a2 Notch 212a3 Opening 212b Rear panel body 212b1 Mounting plate 212c Saran net 220 Lower case 230 Left side case 240 Right side case 250 Front case 260 Plug panel 265 Stay insertion hole

Claims

1. A keyboard provided on the player's side and equipped with a plurality of hammer members; a case including a rear panel having a first sound output hole portion, a top panel connected to the rear panel and having a second sound output hole portion, and a keyboard arrangement portion corresponding to the keyboard; A sound output section; a magnetic shielding member that is disposed between the keyboard and the sound output unit and that includes a magnetic shielding material; Equipped with the magnetic shielding member is provided with a first opening portion corresponding to the second sound output hole portion and through which an upper side of the sound output portion is exposed, The first opening communicates with the second sound emission hole portion and is provided below and to the rear of the second sound emission hole portion.

2. The sound emitting portion and the first sound emitting hole portion are arranged in a front-to-rear direction, 2. The electronic keyboard instrument according to claim 1, wherein the magnetic shielding member is provided so as to cover a magnet or a yoke in the sound emitting portion in the front-rear direction.

3. The magnetic shielding member has a plate-shaped main body portion, an upper mounting portion, and a lower mounting portion, the upper mounting portion is provided parallel to the top panel and fixed to the top panel, 2. The electronic keyboard instrument according to claim 1, wherein the lower mounting portion is provided parallel to the rear panel and fixed to the rear panel.

4. 2. The electronic keyboard instrument according to claim 1, wherein the first opening is formed in an arc shape in accordance with a magnet or a yoke in the sound output section.

5. 5. The electronic keyboard instrument according to claim 1, wherein the magnetic shielding member is provided with a second open portion in the left-right direction.

6. 5. The electronic keyboard instrument according to claim 1, wherein the magnetic shielding member is provided with a closed portion that covers an area immediately below the sound output portion.

7. An electronic keyboard instrument as described in any one of claims 1 to 4, wherein the magnetic shielding member includes a plate-shaped main body portion and a lower cover which is a separate member from the plate-shaped main body portion and corresponds to the hammer member.

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