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 keystroke feel similar to that of a real piano by including hammer members and counterweights. These hammer members and the like are sometimes made of iron-based materials. In such cases, the magnetic force of magnets attached to the speakers can affect the operation of the hammer members and the keystroke feel. Patent Document 1 discloses an electronic keyboard instrument in which a magnetic shielding sheet is provided between a speaker attached to the top panel of the case and hammer members arranged corresponding to the white and black keys on the keyboard. This magnetic shielding sheet reduces the influence of the magnetic force of the speaker's magnets. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-3562 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, vibrations from the speaker can easily affect the entire case, which can cause buzzing noises and have a negative impact on sound quality.

[0005] An object of the present invention is to provide an electronic keyboard instrument in which the speaker and keyboard are placed close to each other, thereby reducing the size of the case and improving the 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 with a keyboard placement 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 containing a magnetic shielding material and arranged between the keyboard and the sound emission portion. [Effects 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 reducing the size of the case and improving the sound quality. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of an electronic keyboard instrument according to an embodiment of the present invention, seen from the front side; [Figure 2] 1 is a perspective view of an electronic keyboard instrument according to an embodiment of the present invention, seen from the rear side; [Figure 3] 1 is an exploded perspective view of a rear panel of an electronic keyboard instrument according to an embodiment of the present invention, as viewed from the rear side. FIG. [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. 1. FIG. [Figure 5] 2 is an enlarged front view of a main part showing an upper case portion of the electronic keyboard instrument according to the embodiment of the present invention. FIG. [Figure 6] FIG. 2 is an enlarged perspective view of a main part showing an upper case portion of the electronic keyboard instrument according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[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 comprises a full-size (88-key) keyboard 50 having a plurality of white keys 30 and a plurality of black keys 40 as the 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 keyboard 50 in the front-to-back direction FB of the keys is referred to as the front side F, the rear of the keyboard 50 in the front-to-back direction FB of the keys is referred to as the rear side B, the left as viewed from the front of the keyboard 50 is referred to as the left side L, and the right as the right side R. The keys on the keyboard 50 are arranged in the left-to-right direction LR. In addition, in the up-down direction UL of the electronic keyboard instrument 10, the top is referred to as the upper side Up, and the bottom is referred to as the lower side Lo.

[0010] As shown in FIGS. 1 and 2, the case 200 has an upper case 210, a lower case 220, side cases (left side case 230 and right side case 240), and a front case 250. The upper case 210 has a top panel 211 and a rear panel 212, has a generally L-shaped vertical cross section (see FIG. 4), and is elongated in the left-right direction LR. The left side case 230 and right side case 240, which are generally rectangular boxes that are 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 (left side case 230, 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 equipped with 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. Stay insertion holes 265 for inserting 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 includes a frame member 212a and rear panel main bodies 212b arranged on the left and right. Each rear panel main body 212b is formed as a substantially rectangular plate that is elongated in the left-right direction LR and has two first sound emission hole sections 71 on each side, sandwiching the plug panel 260. The first sound emission hole sections 71 have a plurality of holes arranged in a substantially honeycomb pattern. The frame member 212a is formed as a single, substantially plate-like plate that is elongated in the left-right direction. The frame member 212a includes an elliptical opening 212a1 with its major axis extending in the left-right direction so as to expose each first sound emission hole section 71, 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 also covered with a saran net 212c.

[0014] As shown in FIG. 4, the top panel 211 of the upper case 210 includes a top panel main body 211a and a top panel member 211b. The top panel main body 211a has a vertical wall portion 211a1 whose front end is suspended near the rear end of the keyboard 50. The vertical wall portion 211a1 is provided with second sound emission holes 72. As shown in FIG. 1, the second sound emission holes 72 are provided in four locations, two on the right side and two on the left side, and are positioned 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 is provided on the rear side B of the top panel main body 211a in a substantially central portion between the left and right rear panel main bodies 212b, suspended along the rear surface. As shown in FIG. 6, a plurality of mounting plates 211a3 are suspended from the top 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 with 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 keys 30 and black keys 40 are rotatably supported at their rear ends by pivot points 25c provided on the inner case 25 (Fig. 4 shows the pivot point 25c that rotatably supports the black keys 40). Each white key 30 is provided with a hook-shaped restriction portion 31 extending from the tip of the white key 30 to the lower side Lo, and its 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 inner case 25 and are connected to each of the white keys 30 and each of the black keys 40. Each hammer member 80 includes 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 inner case 25. The tip of the arm portion 82 is connected to a hammer pressing portion provided on each of the white keys 30 and black keys 40 (in FIG. 4, the hammer pressing portion 41 of the black key 40 is shown).

[0017] When a white key 30 or a black key 40 is struck, the weight portion 81 of the hammer member 80 rises, adding weight to the key when the white key 30 or the black key 40 is struck. This provides a keystroke feel similar to that of a real piano. Cushion members 25a, 25b are provided on the upper and lower sides of the weight portion 81 in the inner case 25, and come into contact with the weight portion 81 at its upper and lower limit positions.

[0018] Furthermore, a circuit board 91 is provided on the top surface of the inner case 25, and a switch 90 is provided on the circuit board 91. A switch 90 is provided corresponding to each white key 30 and black key 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 produced.

[0019] Here, the keyboard 50 includes white keys 30 and black keys 40, an inner case 25, and hammer members 80 attached to and supported by the inner case 25 and operating in conjunction with keystrokes of the white keys 30 and black keys 40.

[0020] 4 to 6, a speaker 75, which is a sound emitting section (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 the 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 arranged with the plate surface of the plate-shaped main body portion 101, which is the plate-shaped main body part, facing in the front-to-rear direction FB. A bulge 101a that bulges out toward the front side F is provided in approximately the center of the plate-shaped main body portion 101 to match 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 101 and are bent toward the front side F to be approximately parallel to the top panel 211. Screw holes are provided in the upper mounting portions 102, and the upper mounting portions 102 are fixed to the top panel main body 211a of the top panel 211 with screws 16. A convex arc-shaped edge portion 103 is formed between the two upper mounting portions 102 to match the convex arc-shaped outer shapes of the magnet 75b and yoke 75c of the speaker 75.

[0023] The lower mounting 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 toward the rear side B, and bending again so that the plate surface faces in the front-to-rear direction FB. The lower mounting portion 104 has screw holes formed in the plate surface facing the front-to-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 direction of approach.

[0024] The magnetic shielding member 100 has a separate lower cover 110 provided on approximately the lower half Lo 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 section 111 that covers up to just below the magnet 75b.

[0025] By making the lower cover 110 a separate member, the plate-shaped main body 101 and the lower cover 110 are doubled in thickness in the portion close to the hammer member 80, improving the magnetic shielding effect. Although the magnetic shielding member 100 is made up of the plate-shaped main body 101 and the lower cover 110 as separate members, 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] The 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 through the opening portion 120. The 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 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 having a first sound emission hole portion 71, an upper panel 211 connected to the rear panel, and a case 200 having 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 including a magnetic shielding material fixed across the upper panel 211 and the rear panel 212 and arranged between the keyboard 50 and the speaker 75 with the plate surface facing in the front-to-rear direction FB.

[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 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, thereby reducing rattle noise generated from the top panel 211 and the back panel 212. Therefore, the sound quality can be improved while making the electronic keyboard instrument 10 small.

[0030] Additionally, top panel 211 is provided with second sound emission hole sections 72 that emit sound toward the performer, and magnetic shielding member 100 has openings 120 that correspond to second sound emission hole sections 72. As a result, in addition to first sound emission hole sections 71 that emit sound toward the audience, second sound emission hole sections 72 that are easy for performers to hear are provided, and sound is emitted from second sound emission hole sections 72 via openings 120 of magnetic shielding member 100, so performers can clearly hear the sounds of their own playing even when magnetic shielding member 100 is provided.

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

[0032] Furthermore, 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 on the vertical wall portion 211a1, which is a location that is less noticeable, thereby improving the design of the electronic keyboard instrument 10.

[0033] The opening 120 is formed in an arc shape, which allows sound to be guided to the second sound emission hole portion 72 while providing good magnetic shielding for the annular magnet 75b.

[0034] Furthermore, the magnetic shielding member 100 has openings 130 in the left-right direction LR, which can reduce the influence of the magnetic shielding member 100 on sound.

[0035] Additionally, keyboard 50 includes hammer members 80. As a result, top panel 211 and rear panel 212 can be held and reinforced while magnetic shielding member 100 reduces the effect of magnets 75b of speaker 75 on the operation of hammer members 80.

[0036] Furthermore, the magnetic shielding member 100 has a closed portion 111 on the lower side thereof, which reduces 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 magnetic shielding member 100 is provided, which includes a magnetic shielding material and is fixed across the top panel 211 and the back panel 212 on which the sound emitting section 75 is arranged. However, the magnetic shielding member 100 may 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 back panel 212 on which the sound emitting section 75 is arranged.

[0038] Although several 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 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 invention and its equivalents as defined in the claims. [Explanation of symbols]

[0039] 10: Electronic keyboard instrument 14: Operation section 25: Inner case 30: White keys 40: Black keys 50: Keyboard 60: Keyboard arrangement section 71: First sound emission hole section 72: Second sound emission hole section 75: Speaker 80: Hammer member 81: Weight section 82: Arm section 90: Switch 91: Circuit board 100: Magnetic shielding member 101: Plate-shaped main body section 102: Upper mounting section 103: Edge section 104: Lower mounting section 110: Lower cover 111: Closed section 120: Opening 130: Open section 200: Case 210: Upper case 211: Top panel 212: Rear panel 220: Lower case 230: Left side case 240: Right side case 250: Front case

Claims

1. a keyboard provided on the player's side of the electronic keyboard instrument; a rear panel having first sound output holes, a top panel connected to the rear panel, and a case having a keyboard arrangement section corresponding to the keyboard; a sound emitting portion disposed corresponding to the first sound emitting hole portion; a magnetic shielding member fixed across the top panel and the rear panel and including a magnetic shielding material and disposed between the keyboard and the sound output unit; An electronic keyboard instrument comprising:

2. the top panel is provided with a second sound emission hole portion for emitting sound toward the player, 2. The electronic keyboard instrument according to claim 1, wherein the magnetic shielding member has an opening corresponding to the second sound emission hole portion.

3. 3. The electronic keyboard instrument according to claim 2, wherein the second sound emission hole emits sound toward the keyboard.

4. 4. The electronic keyboard instrument according to claim 2, wherein the opening is formed in an arc shape.

5. 5. The electronic keyboard instrument according to claim 1, wherein the magnetic shielding member has open portions in the left and right directions.

6. 6. The electronic keyboard instrument according to claim 1, wherein the keyboard comprises hammer members.

7. 7. The electronic keyboard instrument according to claim 1, wherein the magnetic shielding member has a closed portion on the lower side.

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