Electronic musical instrument

Abstract

To provide an electronic musical instrument which does not require the surface and the back surface of a musical instrument case to be reversed, and which can easily stand the musical instrument case with the back surface of the musical instrument case being a bottom surface.SOLUTION: An electronic musical instrument includes: a musical instrument case 1 in which a keyboard part 2 is provided; and a music rest mounting part 13 which is provided at a back surface 1c of the musical instrument case 1, and which has a mounting hole 13a on which a support part 12 of a music rest member 7 can be mounted. In the music rest mounting part 13, an edge part 13b of the mounting hole 13a protrudes as a leg part from the back surface 1c of the musical instrument case 1. Therefore, when the musical instrument case 1 is allowed to stand with the back surface 1c of the musical instrument case 1 being the bottom surface, the edge part 13b of the mounting hole 13a of the music rest mounting part 13 can be placed on a placement surface T of a desk or the like. Thereby, even when the entire musical instrument is heavy, it is not necessary to reverse the surface and the back surface of the musical instrument case 1, and the musical instrument case 1 can be allowed to stand simply and easily.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This invention relates to electronic musical instruments such as electronic keyboard musical instruments.

Background Art

[0002] For example, in an electronic keyboard musical instrument, as described in Patent Document 1, there is known an instrument case equipped with a keyboard section in which a plurality of keys are arranged and having a structure formed in a long and narrow rectangular box shape. Such an electronic keyboard musical instrument is configured such that weights are provided for each of the plurality of keys so as to obtain a key touch approximated to that of an acoustic piano.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such an electronic keyboard musical instrument, when weights are provided for each of the plurality of keys, the weight of the entire instrument increases, and thus, when performing maintenance work such as battery replacement or repair, it becomes troublesome to invert the instrument case front to back.

[0005] The problem to be solved by this invention is to provide an electronic musical instrument that does not require inverting the instrument case front to back and can easily stand up the instrument case with the back surface of the instrument case as the bottom surface.

Means for Solving the Problems

[0006] This invention provides a musical instrument case provided with a keyboard section, and a sheet music stand attachment section provided on the back surface of the musical instrument case and having attachment holes to which support sections of a sheet music stand member can be attached. The sheet music stand attachment section is characterized in that the edges of the attachment holes protrude from the back surface of the musical instrument case as legs.

Advantages of the Invention

[0007] According to this invention, it is not necessary to turn the musical instrument case inside out, and the musical instrument case can be easily stood up with the back surface of the musical instrument case as the bottom surface.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0009] Hereinafter, with reference to FIGS. 1 to 9, an embodiment in which this invention is applied to an electronic keyboard instrument will be described. As shown in FIGS. 1 and 2, this electronic keyboard instrument includes an instrument case 1. This instrument case 1 is formed in the shape of an elongated rectangular box. That is, this instrument case 1 includes an upper surface 1a, a front surface 1b, a rear surface 1c, a lower surface 1d which is the back surface (see FIG. 7), and side surfaces 1e on both sides.

[0010] In this case, as shown in FIGS. 1 and 2, the upper surface 1a and the lower surface 1d (see FIG. 7) are located in the vertical direction of the instrument case 1. The front surface 1b and the rear surface 1c are located in the front-rear direction of the instrument case 1. The side surfaces 1e on both sides are located on both sides in the left-right direction which is the longitudinal direction of the instrument case 1.

[0011] As shown in FIGS. 1 and 2, an opening 3 for exposing the keyboard section 2 is provided on the upper surface 1a of this instrument case 1. This opening 3 is provided in a region excluding the rear side portion in the front-rear direction and both side portions in the longitudinal direction of the upper surface 1a of the instrument case 1, and in a region excluding the lower side portion in the vertical direction of the front surface 1b.

[0012] As shown in FIGS. 1 and 2, the keyboard section 2 is formed by arranging a plurality of white keys 2a and a plurality of black keys 2b in the order of musical scales, and is configured such that the upper surfaces and the upper sides of the front end portions of the plurality of white keys 2a and the plurality of black keys 2b are exposed from the opening 3. Further, as shown in FIG. 3, in this keyboard section 2, a plurality of white keys 2a and a plurality of black keys 2b are arranged on a keyboard chassis 4 provided in the instrument case 1 so as to rotate according to a key pressing operation.

[0013] In this case, as shown in FIG. 3, hammer members 2c each having a hammer are rotatably attached to a plurality of white keys 2a and a plurality of black keys 2b. Thereby, when each of the plurality of white keys 2a and the plurality of black keys 2b is pressed, the plurality of hammer members 2c each rotate, and a load by the hammer of the hammer member 2c is applied to the pressed white key 2a and black key 2b, so that a key touch similar to that of an acoustic piano is obtained.

[0014] Further, as shown in FIG. 3, the keybed 2 is provided with a plurality of switch units 5 corresponding to the plurality of white keys 2a and the plurality of black keys 2b respectively. Thereby, when each of the plurality of white keys 2a and the plurality of black keys 2b is pressed, any one of the plurality of switch units 5 is configured to perform a switch operation by the pressed white key 2a and black key 2b.

[0015] That is, as shown in FIG. 3, the plurality of switch units 5 are provided corresponding to the plurality of white keys 2a and the plurality of black keys 2b respectively on a switch substrate 6 provided on the keybed chassis 4. When these plurality of switch units 5 perform a switch operation by the pressed white key 2a and black key 2b, they are configured to output a switch signal for causing a speaker (not shown) to emit musical sound. The speaker may be provided, for example, on both side portions in the longitudinal direction on the back surface 1c of the instrument case 1 shown in FIG. 2.

[0016] Also, on one side portion in the longitudinal direction of the instrument case 1, that is, the left side portion in FIG. 1 and the upper surface 1a of the instrument case 1, as shown in FIGS. 1 and 2, various switches 9 necessary for instrument functions such as a power switch and a volume switch are provided. Further, a music stand member 7 is detachably attached to the back surface 1c of the instrument case 1, and a connection attachment member 10 equipped with a plurality of connection terminals 8 is attached.

[0017] As shown in FIGS. 1 to 4, the score stand member 7 includes a score stand main body portion 11 and two support portions 12 that support both side portions in the longitudinal direction of the score stand main body portion 11, and the support portions 12 are respectively configured to be attached to two score stand attachment portions 13 provided on the back surface 1c of the instrument case 1. The score stand main body portion 11 is for leaning a score, a tablet terminal, etc., and includes a placement portion 14 and an inclined plate 15.

[0018] As shown in FIGS. 1 to 3, the placement portion 14 is formed to have a length of about half of the length of the instrument case 1 in the longitudinal direction and is configured to be disposed on the back surface 1c of the instrument case 1. That is, the placement portion 14 is attached to the support portion 12 together with the inclined plate 15 by screws 16 and is configured to be attached to the score stand attachment portion 13 provided on the back surface 1c of the instrument case 1 by the support portion 12.

[0019] As shown in FIGS. 1 to 3, the inclined plate 15 is a rectangular flat plate, the length in the longitudinal direction is the same as the length in the longitudinal direction of the placement portion 14, and the length in the vertical direction is formed to be about half of the length in the longitudinal direction. The inclined plate 15 is attached to the support portion 12 together with the placement portion 14 by screws 16 in a state of being slightly inclined toward the rear of the instrument case 1.

[0020] As shown in FIG. 3, the support portion 12 includes a rod-shaped support insertion portion 12a to be inserted into the attachment hole 13a of the score stand attachment portion 13 and a support attachment portion 12b to which the score stand main body portion 11 is attached. The support attachment portion 12b extends obliquely downward from the upper end portion of the support insertion portion 12a located on the back surface 1c of the instrument case 1 toward the rear of the instrument case 1, extends obliquely upward from the extended tip, and the score stand main body portion 11 is configured to be attached to the portion extending obliquely upward.

[0021] As shown in FIGS. 3 to 5, the score holder attachment portion 13 is attached by inserting the support portion 12 of the score holder member 7 in a tilted state toward the rear of the instrument case 1, and is provided on both longitudinal sides of the rear surface 1c of the instrument case 1. That is, these score holder attachment portions 13 are located on both sides of the rear surface 1c of the instrument case 1 at positions equally distributed in length on both longitudinal sides with respect to the middle portion in the longitudinal direction of the rear surface 1c of the instrument case 1, and corresponding to both side portions in the longitudinal direction of the score holder main body portion 11.

[0022] As shown in FIGS. 3 and 5, each of these score holder attachment portions 13 is formed of a hard synthetic resin such as ABS resin. These score holder attachment portions 13 are inserted into the instrument case 1 through the mounting holes 18a of the back plate 18 provided on the rear surface 1c of the instrument case 1, and are configured to be fixed to the fixing member 19 fixed in the instrument case 1 by a plurality of screws 19a.

[0023] In this case, as shown in FIGS. 3 to 5, the attachment hole 13a for inserting the support portion 12 from the rear surface 1c side of the instrument case 1 is provided in the score holder attachment portion 13 so as to be obliquely inclined in the front-rear direction from the upper side to the lower side. That is, the attachment hole 13a is formed so that the support portion 12 of the score holder member 7 is inserted in a tilted state toward the rear of the instrument case 1. The inner diameter of the attachment hole 13a is formed slightly larger than the outer diameter of the support insertion portion 12a of the support portion 12.

[0024] Further, as shown in FIGS. 3 to 5, the attachment hole 13a has an opening formed larger than the outer diameter of the support insertion portion 12a on the insertion side where the support insertion portion 12a of the support portion 12 is inserted. In this case, the opening of the attachment hole 13a is formed in a substantially elliptical shape that is long in the vertical direction on the rear surface 1c of the instrument case 1. In this case, the edge portion 13b of the attachment hole 13a has a larger area on the lower side of the substantially elliptical shape that is long in the vertical direction on the rear surface 1c of the instrument case 1.

[0025] As shown in FIGS. 3 to 5, the edge portion 13b of the opening of the mounting hole 13a is disposed at the edge of the inner peripheral portion of the mounting hole 18a of the back plate 18 of the instrument case 1, and is formed so as to protrude as a leg portion from the back surface 1c of the instrument case 1 in this state. As a result, as shown in FIG. 7, the instrument case 1 is configured to stand upright with the back surface 1c of the instrument case 1 as the bottom surface by the edge portion 13b of the mounting hole 13a of the score stand mounting portion 13.

[0026] That is, as shown in FIGS. 3 to 5 and FIG. 7, the edge portion 13b of the mounting hole 13a of the score stand mounting portion 13 provided on both sides of the back surface 1c of the instrument case 1 is formed in a substantially elliptical shape that is long in the vertical direction on the back surface 1c of the instrument case 1. Therefore, when the instrument case 1 is placed on a placement surface T such as a tabletop with the back surface 1c as the bottom surface and made to stand upright, the edge portion 13b is configured to serve as a leg portion.

[0027] On the other hand, the connection mounting member 10 having a plurality of connection terminals 8 is attached to the back plate 18 provided on the back surface 1c of the instrument case 1, as shown in FIGS. 2, 4, and 6. A rectangular connection hole 18b is provided in this back plate 18. In this case, the connection hole 18b of the back plate 18 is formed in an elongated rectangular shape along the longitudinal direction of the score stand member 7 at a location of the back plate 18 located below the score stand member 7. That is, the connection hole 18b is distributed with an equal length in the longitudinal direction with the middle portion in the longitudinal direction of the back surface 1c of the instrument case 1 as a reference.

[0028] As shown in FIGS. 4 and 6, the connection mounting member 10 includes a mounting exposed portion 10a disposed in the connection hole 18b of the back plate 18, and a mounting fixing portion 10b attached to the inner surface of the back plate 18 and the bottom of the lower surface 1d which is the back surface of the instrument case 1. The mounting exposed portion 10a is formed in a substantially flat plate shape of a long rectangle along the longitudinal direction of the back plate 18.

[0029] As shown in FIGS. 4 and 6, this mounting exposed portion 10a is formed with a length in its longitudinal direction shorter than the length in the longitudinal direction of the score stand member 7. In this case, similar to the connection hole 18b, this mounting exposed portion 10a is distributed with an equal length in the longitudinal direction based on the intermediate portion in the longitudinal direction on the back surface 1c of the instrument case 1.

[0030] As shown in FIGS. 4 and 6, on the upper side portion and each side portion on both sides in the longitudinal direction of this mounting exposed portion 10a, there are provided protruding portions 20 that protrude outward from the back surface 1c of the back plate 18 of the instrument case 1. This protruding portion 20 is configured to protrude from the back surface 1c of the instrument case 1 as legs with the same length as the protruding length of the edge portion 13b of the mounting hole 13a of the score stand mounting portion 13 protruding from the back surface of the instrument case 1.

[0031] As shown in FIGS. 4 and 6, the protruding portions 20 on each side portion on both sides in the longitudinal direction of the mounting exposed portion 10a are inclined toward the lower surface 1d side which is the back surface of the instrument case 1, and a part of the lower surface 1d side of each side portion has a shorter protruding length from the back surface 1c of the instrument case 1 than the others. Note that the protruding portions 20 on each side portion on both sides in the longitudinal direction of this mounting exposed portion 10a may protrude with the same length as the protruding length of the edge portion 13b of the mounting hole 13a of the score stand mounting portion 13 protruding from the back surface 1c of the instrument case 1 and may not be inclined.

[0032] Also, as shown in FIGS. 4, 6, and 8, this protruding portion 20 is provided between the score stand mounting portions 13 provided on both sides in the longitudinal direction on the back surface 1c of the instrument case 1. This protruding portion 20 is provided on the back surface 1c of the instrument case 1 and is located on the lower surface 1d side which is the back surface of the instrument case 1 rather than the score stand mounting portion 13. That is, the score stand mounting portion 13 is provided on the back surface 1c of the instrument case 1 and is located on the upper surface 1a side of the instrument case 1 rather than the connection mounting member 10.

[0033] As a result, when the instrument case 1 stands upright on a placement surface T such as a tabletop with the back surface 1c as the bottom surface as shown in FIG. 7, the instrument case 1 is configured to be supported at three points (three locations), namely, at each edge portion 13b of each mounting hole 13a of the two music stand mounting portions 13 on both sides of the back surface 1c of the instrument case 1 and at the protrusion portion 20 of the connection mounting member 10.

[0034] By the way, as shown in FIGS. 4, 8, and 9, a plurality of connection terminals 8 are provided in an array along the longitudinal direction on the mounting exposed portion 10a of the connection mounting member 10. The plurality of connection terminals 8 are configured such that connection components such as communication chip components 21, plugs 22, and jacks (not shown) are connected thereto.

[0035] In this case, as shown in FIGS. 8 and 9, the plug 22 is L-shaped and includes a plug portion 22a inserted into the connection terminal 8, a connection wire 22b extending in a direction perpendicular to the plug portion 22a, and a cover portion 22c covering the plug portion 22a and the connection wire 22b in an L-shape except for the tip of the plug portion 22a.

[0036] As shown in FIGS. 8 and 9, a plug recess 23 in which the cover portion 22c of the plug 22 is disposed is provided in the mounting exposed portion 10a of the connection mounting member 10 corresponding to the connection terminal 8 to which the L-shaped plug 22 is connected, and the plug recess 23 is recessed one step lower from the outer surface of the mounting exposed portion 10a. The plug recess 23 is widely provided with a size such that the cover portion 22c covering the plug portion 22a is rotatably disposed therein.

[0037] As shown in FIGS. 4 and 9, a regulating protrusion 23a for regulating the direction of the connection wire 22b is provided in the plug recess 23. The regulating protrusion 23a regulates the cover portion 22c so as to tilt it in a direction in which the connection wire 22b extending in a direction perpendicular to the plug portion 22a is inclined downward obliquely. The regulating protrusion 23a is formed with a length in a direction protruding from the inside of the plug recess 23 to the outside that is the same as the protruding length of the protrusion portion 20 of the connection mounting member 10.

[0038] As a result, as shown in FIGS. 8 and 9, when the L-shaped plug 22 is in a state where the plug portion 22a is inserted into and connected to the connection terminal 8 of the connection attachment member 10, and the lower surface 1d of the instrument case 1 is placed on a placement surface T such as a tabletop, the connection wire 22b is prevented from coming into perpendicular contact with the placement surface T, thereby preventing damage to the connection terminal 8.

[0039] Also, as shown in FIG. 7, a battery cover 25 is provided on the lower surface 1d, which is the back surface of the instrument case 1, so as to be openable and closable. Although not shown, this battery cover 25 is configured to open and close so as to block a battery storage portion that stores a plurality of batteries for supplying power to the circuit portion of the electronic keyboard instrument.

[0040] Next, the operation of such an electronic keyboard instrument will be described. When performing on this electronic keyboard instrument, first, the music stand member 7 is attached to the back surface 1c of the instrument case 1. At this time, the music stand member 7 is assembled in advance. That is, the support portions 12 are arranged on both sides of the placement portion 14 of the music stand main body portion 11, and in this state, the inclined plate 15 of the music stand main body portion 11 is attached to the support attachment portion 12b of the support portion 12 together with the placement portion 14 by screws 16. Thereby, the music stand member 7 is assembled.

[0041] This music stand member 7 is attached to the back surface 1c of the instrument case 1. At this time, the two support portions 12 on both sides of the music stand member 7 are attached to two music stand attachment portions 13 provided on both sides of the back surface 1c of the instrument case 1. In this case, the support insertion portions 12a of the two support portions 12 on both sides of the music stand member 7 are respectively inserted into the attachment holes 13a of the two music stand attachment portions 13. As a result, with the inclined plate 15 of the music stand member 7 tilted backward, the placement portion 14 of the music stand member 7 is arranged on the back surface 1c of the instrument case 1.

[0042] In this state, place the sheet music or the tablet terminal against the sheet music stand member 7. Then, operate the switch 9 of the instrument case 1 to turn on the power and adjust the volume and the like. As a result, the electronic keyboard instrument becomes ready for performance. In this state, press the plurality of white keys 2a and the plurality of black keys 2b of the keyboard section 2. Then, the pressed white keys 2a and black keys 2b rotate, and the hammer member 2c is rotated against the weight of the hammer.

[0043] At this time, a load by the hammer of the hammer member 2c is applied to the pressed white keys 2a and black keys 2b. Thereby, a key touch approximated to the key touch of an acoustic piano is obtained. Also, at this time, the pressed white keys 2a and black keys 2b press the switch section 5 to cause a switch operation. As a result, musical sounds corresponding to the pressed white keys 2a and black keys 2b are emitted from a speaker (not shown).

[0044] By the way, when performing maintenance work such as battery replacement or repair on this electronic keyboard instrument, it is not necessary to turn the instrument case 1 inside out and place it on a placement surface T such as a tabletop. The sheet music stand member 7 can be removed from the back surface 1c of the instrument case 1, and the instrument case 1 can be stood up on a placement surface T such as a tabletop with the back surface 1c of the instrument case 1 as the bottom surface.

[0045] That is, when the sheet music stand member 7 is removed from the back surface 1c of the instrument case 1, the edge 13b of the mounting hole 13a of the sheet music stand mounting portion 13 and the protrusion 20 of the connection mounting member 10 protrude and are exposed on the back surface 1c of the instrument case 1 with the same protruding length. In this case, the sheet music stand mounting portions 13 are located on both sides of the back surface 1c of the instrument case 1, and the connection mounting member 10 is disposed between these sheet music stand mounting portions 13.

[0046] Also, in this case, the score stand attachment portion 13 is provided on the back surface 1c of the instrument case 1, on the upper surface 1a side of the instrument case 1 rather than the connection attachment member 10. For this reason, when the instrument case 1 is erected with the back surface 1c as the bottom surface, it is supported at three points: the edge portions 13b of each mounting hole 13a of the two score stand attachment portions 13 located on both sides of the back surface 1c of the instrument case 1 and the protrusion 20 of the connection attachment member 10.

[0047] As a result, the instrument case 1 can be stably erected on a placement surface T such as a tabletop with the back surface 1c of the instrument case 1 as the bottom surface. For this reason, when performing maintenance work such as battery replacement or repair, there is no need to turn the instrument case 1 inside out and place it on a placement surface T such as a tabletop. With the back surface 1c of the instrument case 1 as the bottom surface, maintenance work can be performed with the instrument case 1 erected on a placement surface T such as a tabletop.

[0048] Next, a case where the lower surface 1d of this electronic keyboard instrument is placed on a placement surface T such as a tabletop and an L-shaped plug 22 is inserted into the connection terminal 8 of the connection attachment member 10 for use will be described. In this case, a plug recess 23 in which the cover portion 22c of the plug 22 is disposed is provided to be recessed one step lower in the attachment exposed portion 10a of the connection attachment member 10, and a regulating protrusion 23a for regulating the direction of the connection wire 22b of the plug 22 protrudes from the inside of the plug recess 23 toward the outside in the plug recess 23.

[0049] For this reason, when inserting the L-shaped plug 22 into the connection terminal 8 provided corresponding to the plug recess 23 of the connection attachment member 10, the regulating protrusion 23a provided in the plug recess 23 regulates the connection wire 22b extending in a right angle direction from the plug portion 22a of the plug 22 so as to incline the cover portion 23c downward obliquely. This prevents the connection wire 22b of the plug 22 from coming into perpendicular contact with the placement surface T such as a tabletop, and can prevent damage to the connection terminal 8 provided on the connection attachment member 10 by the plug portion 22a.

[0050] Thus, according to this electronic keyboard instrument, it includes an instrument case 1 provided with a keyboard section 2, and a music stand mounting section 13 provided on the back surface 1c of the instrument case 1 and having a mounting hole 13a to which a support section 12 of a music stand member 7 can be attached. The music stand mounting section 13 has an edge 13b of the mounting hole 13a protruding from the back surface 1c of the instrument case 1 as a leg portion, so that it is not necessary to turn the instrument case 1 inside out, and the instrument case 1 can be easily erected with the back surface 1c of the instrument case 1 as the bottom surface.

[0051] That is, in this electronic keyboard instrument, since the edge 13b of the mounting hole 13a of the music stand mounting section 13 provided on the back surface 1c of the instrument case 1 protrudes from the back surface 1c of the instrument case 1 as a leg portion, when the instrument case 1 is erected with the back surface 1c of the instrument case 1 as the bottom surface, the edge 13b of the mounting hole 13a of the music stand mounting section 13 can be arranged as a leg portion on a placement surface T such as a tabletop.

[0052] Thereby, in this electronic keyboard instrument, even if the overall weight of the instrument is heavy, it is not necessary to turn the instrument case 1 inside out, and the instrument case 1 can be simply and easily erected with the back surface 1c of the instrument case 1 as the bottom surface. That is, in this electronic keyboard instrument, since the instrument case 1 is formed in a substantially rectangular box shape, it is not necessary to turn the instrument case 1 inside out, and the instrument case 1 can be simply and easily erected with the back surface 1c of the instrument case 1 as the bottom surface.

[0053] In this case, in this electronic keyboard instrument, since the instrument case 1 is erected with the back surface 1c of the instrument case 1 as the bottom surface by the edge 13b of the mounting hole 13a of the music stand mounting section 13, when the instrument case 1 is erected, the edge 13b of the mounting hole 13a of the music stand mounting section 13 can be easily arranged as a leg portion on a placement surface T such as a tabletop. Thereby, during maintenance such as battery replacement or repair, it is not necessary to turn the instrument case 1 inside out, so even if the overall weight of the instrument is heavy, the instrument case 1 can be easily erected and good maintenance work can be performed.

[0054] In addition, in this electronic keyboard instrument, since the score holder attachment parts 13 are provided on both longitudinal sides of the back surface 1c of the instrument case 1, when the instrument case 1 is erected with the back surface 1c of the instrument case 1 as the bottom surface, the instrument case 1 can be erected and arranged in a stable state on a placement surface T such as a tabletop by the edge parts 13b of the mounting holes 13a of the score holder attachment parts 13 provided on both longitudinal sides of the back surface 1c of the instrument case 1.

[0055] That is, in this electronic keyboard instrument, since the score holder attachment parts 13 are provided at positions evenly distributed with equal lengths on the left and right sides with the middle part in the longitudinal direction of the back surface 1c of the instrument case 1 as a reference, when the instrument case 1 is erected with the back surface 1c of the instrument case 1 as the bottom surface, the instrument case 1 can be erected and arranged in a stable state on a placement surface T such as a tabletop by the edge parts 13b of the mounting holes 13a of the score holder attachment parts 13.

[0056] In addition, in this electronic keyboard instrument, since the edge parts 13b of the mounting holes 13a of the score holder attachment parts 13 are formed in a substantially elliptical shape that is long in the vertical direction on the back surface 1c of the instrument case 1, when the instrument case 1 is erected with the back surface 1c of the instrument case 1 as the bottom surface, the instrument case 1 can be erected and arranged well in a stable state on a placement surface T such as a tabletop by the edge parts 13b formed in a substantially elliptical shape.

[0057] In this case, in this electronic keyboard instrument, since the edge parts 13b of the mounting holes 13a of the score holder attachment parts 13 are formed such that the area of the lower side of the substantially elliptical shape that is long in the vertical direction on the back surface 1c of the instrument case 1 is wide, when the instrument case 1 is erected with the back surface 1c of the instrument case 1 as the bottom surface, the instrument case 1 can be erected and arranged well in a stable state on a placement surface T such as a tabletop by the wide area of the lower side of the substantially elliptical shape in the edge parts 13b.

[0058] Also, in this electronic keyboard instrument, a connection attachment member 10 having a plurality of connection terminals 8 is provided on the back surface 1c of the instrument case 1. On this connection attachment member 10, an edge portion 13b of a mounting hole 13a of the music score stand mounting portion 13 has the same length as the protruding length from the back surface 1c of the instrument case 1, and a protruding portion 20 protruding as a leg portion from the back surface 1c of the instrument case 1 is provided. Thus, by the edge portion 13b of the mounting hole 13a of the music score stand mounting portion 13 and the protruding portion 20 of the connection attachment member 10, the instrument case 1 can be erected and arranged in a stable state on a placement surface T such as a tabletop.

[0059] Also, in this electronic keyboard instrument, since the protruding portion 20 protruding from the back surface 1c of the instrument case 1 has a linear portion along the longitudinal direction of the instrument case 1, by the edge portion 13b of the mounting hole 13a of the music score stand mounting portion 13 and the linear protruding portion 20 of the connection attachment member 10, the instrument case 1 can be favorably erected and arranged in a stable state on a placement surface T such as a tabletop. That is, since the protruding portion 20 is distributed with equal lengths on both the left and right sides with respect to the intermediate portion in the longitudinal direction on the back surface 1c of the instrument case 1, the instrument case 1 can be favorably erected and arranged in a stable state on a placement surface T such as a tabletop.

[0060] In this case, in this electronic keyboard instrument, the protruding portion 20 of the connection attachment member 10 is provided on the upper side portion and both side portions of the attachment exposed portion 10a of the connection attachment member 10. The upper side portion is formed in a linear shape along the longitudinal direction of the instrument case 1, and both side portions are formed in a linear shape along the vertical direction on the back surface 1c of the instrument case 1. Thus, by the edge portion 13b of the mounting hole 13a of the music score stand mounting portion 13 and the protruding portion 20 of the connection attachment member 10, the instrument case 1 can be more reliably and favorably erected and arranged in a more stable state on a placement surface T such as a tabletop.

[0061] Also, in this electronic keyboard instrument, when the instrument case 1 is placed upright with the back surface 1c as the bottom surface, it is supported by the edge portions 13b of each mounting hole 13a of the two score holders mounting portions 13 provided on both longitudinal sides of the back surface 1c of the instrument case 1 and the protruding portions 20 of the connection mounting member 10. Thus, the instrument case 1 can also be placed upright in a stable state on a placement surface T such as a tabletop.

[0062] Also, in this electronic keyboard instrument, since the protruding portions 20 of the connection mounting member 10 are provided between the score holder mounting portions 13 provided on both longitudinal sides of the back surface 1c of the instrument case 1, the instrument case 1 can also be placed upright in a stable state on a placement surface T such as a tabletop.

[0063] Furthermore, in this electronic keyboard instrument, on the back surface 1c of the instrument case 1, since the score holder mounting portions 13 are provided on the upper surface 1a side of the instrument case 1 rather than the connection mounting member 10, the instrument case 1 can also be placed upright in a stable state on a placement surface T such as a tabletop.

[0064] As described above, one embodiment of the present invention has been explained. However, the present invention is not limited to this and includes the invention described in the claims and its equivalent scope. Hereinafter, the invention described in the claims of the present application is appended.

[0065] (Appended Note) The invention according to claim 1 comprises an instrument case provided with a keyboard portion, and a score holder mounting portion provided on the back surface of the instrument case and having mounting holes to which support portions of a score holder member can be attached. The score holder mounting portion is characterized in that the edge portions of the mounting holes protrude from the back surface of the instrument case as legs.

[0066] The invention according to claim 2 is an electronic musical instrument according to claim 1, wherein the instrument case stands up with the back surface of the instrument case as the bottom surface by the edge of the mounting hole of the music stand mounting portion.

[0067] The invention according to claim 3 is an electronic musical instrument according to claim 1 or claim 2, wherein the music stand mounting portion is provided on both sides in the longitudinal direction on the back surface of the instrument case.

[0068] The invention according to claim 4 is an electronic musical instrument according to any one of claims 1 to 3, wherein the edge of the mounting hole of the music stand mounting portion is formed in a substantially elliptical shape that is long in the vertical direction on the back surface of the instrument case.

[0069] The invention according to claim 5 is an electronic musical instrument according to claim 4, wherein the area of the lower side of the edge of the mounting hole of the music stand mounting portion, which is in a substantially elliptical shape that is long in the vertical direction on the back surface of the instrument case, is widely formed.

[0070] The invention according to claim 6 is an electronic musical instrument according to any one of claims 1 to 5, wherein a connection mounting member having connection terminals is provided on the back surface of the instrument case, and the connection mounting member is provided with a protrusion that protrudes from the back surface of the instrument case as a leg portion with the same length as the protruding length of the edge of the mounting hole of the music stand mounting portion from the back surface of the instrument case.

[0071] The invention according to claim 7 is an electronic musical instrument according to claim 6, wherein when the instrument case stands up with the back surface as the bottom surface, it is supported by the edges of the mounting holes of the two music stand mounting portions located on both sides in the longitudinal direction on the back surface of the instrument case and the protrusions of the connection mounting member.

[0072] The invention according to claim 8 is an electronic musical instrument according to claim 6 or claim 7, wherein the protrusion of the connection attachment member is provided between the music stand attachment portions provided on both longitudinal sides of the back surface of the instrument case.

[0073] The invention according to claim 9 is an electronic musical instrument according to claim 8, wherein the music stand attachment portion is provided on the back surface of the instrument case, positioned on the upper surface side of the instrument case with respect to the connection attachment member.

Explanation of Reference Numerals

[0074] 1 Instrument case 1a Upper surface 1b Front surface 1c Back surface 1d Lower surface 1e Side surface 2 Keyboard section 2a White keys 2b Black keys 2c Hammer member 3 Opening 4 Keyboard chassis 5 Switch section 6 Switch substrate 7 Music stand member 8 Connection terminal 9 Switch 10 Connection attachment member 10a Attachment exposed portion 10b Attachment fixing portion 11 Music stand main body portion 12 Support portion 12a Support insertion portion 12b Support attachment portion 13 Music stand attachment portion 13a Attachment hole 13b Edge portion 14 Mounting portion 15 Inclined plate 16, 19a Screws 18 Back panel 18a Mounting hole 18b Connection hole 19 Fixing member 20 projections 21 chip component 22 plug 22a plug portion 22b connecting wire 22c cover portion 23 plug recess 23a regulating projection 25 battery cover T mounting surface

Claims

1. An instrument case having a keyboard section; a music stand attachment portion provided on a rear surface of the musical instrument case and having an attachment hole to which a support portion of a music stand member can be attached; Equipped with 11. The electronic musical instrument according to claim 10, wherein the music stand mounting portion has an edge portion of the mounting hole protruding from the rear surface of the musical instrument case as a leg.

2. 2. The electronic musical instrument according to claim 1, The musical instrument case stands upright with the rear surface of the musical instrument case as a bottom surface by the edge of the mounting hole of the music stand mounting portion.

1. An electronic musical instrument comprising:

3. 3. The electronic musical instrument according to claim 1, The music stand attachment portions are provided on both sides in the longitudinal direction of the rear surface of the instrument case.

1. An electronic musical instrument comprising:

4. In the electronic musical instrument according to any one of claims 1 to 3, The edge of the mounting hole of the music stand mounting portion is formed in a substantially elliptical shape that is long in the vertical direction on the rear surface of the instrument case.

1. An electronic musical instrument comprising:

5. 5. The electronic musical instrument according to claim 4, The edge of the mounting hole of the music stand mounting portion is formed in a generally elliptical shape that is long in the vertical direction on the rear surface of the musical instrument case, and the area of ​​the lower side is wide.

1. An electronic musical instrument comprising:

6. In the electronic musical instrument according to any one of claims 1 to 5, a connection attachment member having a connection terminal is provided on the rear surface of the instrument case; The connection mounting member is provided with a protrusion that protrudes as a leg from the rear surface of the instrument case and has the same length as the edge of the mounting hole of the music stand mounting portion protruding from the rear surface of the instrument case.

1. An electronic musical instrument comprising:

7. 7. The electronic musical instrument according to claim 6, When the instrument case is placed upright with the back surface as a bottom surface, the instrument case is supported by the edges of the mounting holes of the two music stand mounting parts located on both sides in the longitudinal direction of the back surface of the instrument case and the protrusions of the connecting mounting members.

1. An electronic musical instrument comprising:

8. 8. The electronic musical instrument according to claim 6 or 7, The protrusion of the connection attachment member is provided between the music stand attachment parts provided on both sides in the longitudinal direction of the rear surface of the instrument case.

1. An electronic musical instrument comprising:

9. 9. The electronic musical instrument according to claim 8, The music stand attachment portion is provided on the rear surface of the instrument case, and is located closer to the upper surface of the instrument case than the connection attachment member.

1. An electronic musical instrument comprising:

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