Electronic Instruments

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] The present invention relates to an electronic musical instrument such as an electronic keyboard instrument. [Background technology]

[0002] For example, in the field of electronic keyboard instruments, there is known an instrument case having a structure formed in the shape of a long and narrow rectangular box, which is equipped with a keyboard section on which a number of keys are arranged, as described in Patent Document 1. In such electronic keyboard instruments, weights are provided on each of the multiple keys, and the instrument is configured to provide a key touch that is similar to that of an acoustic piano. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-189516 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with such electronic keyboard instruments, providing weights for each of the multiple keys increases the weight of the entire instrument, which creates the problem of making it cumbersome to turn the instrument case upside down when performing maintenance work such as battery replacement or repairs.

[0005] To provide an electronic musical instrument in which the instrument case can be easily stood up using the back surface of the instrument case as a base without the need to turn the instrument case upside down. [Means for solving the problem]

[0006] This invention is an electronic musical instrument comprising an instrument case in which a keyboard portion is provided, and a music stand mounting portion provided on the rear surface of the instrument case and having a mounting hole into which a support portion of a music stand component can be attached, wherein the edge of the mounting hole protrudes from the rear surface of the instrument case as a leg. Effect of the Invention

[0007] According to this invention, there is no need to turn the instrument case upside down, and the instrument case can be easily stood up with the back surface of the instrument case as the bottom surface. [Brief description of the drawings]

[0008] [Figure 1] 1 is a front perspective view showing an embodiment in which the present invention is applied to an electronic keyboard instrument; [Diagram 2] 2 is a perspective view of the electronic keyboard instrument shown in FIG. 1, as seen from the rear side. [Diagram 3] 2 is an enlarged cross-sectional view of the electronic keyboard instrument shown in FIG. 1 taken along the line AA. [Figure 4] 3 is a rear perspective view showing the electronic keyboard instrument shown in FIG. 2 with a music stand member removed. FIG. [Diagram 5] 4 is an enlarged cross-sectional view showing the electronic keyboard instrument shown in FIG. 3 with a music stand member removed. FIG. [Figure 6] 5 is an enlarged cross-sectional view of the electronic keyboard instrument shown in FIG. 4 taken along the line BB. [Figure 7] 5 is a perspective view of the electronic keyboard instrument shown in FIG. 4, with the instrument case standing upright with the rear surface of the instrument case serving as the bottom surface, as viewed from the rear side. FIG. [Figure 8] 5 is a rear perspective view showing a state in which a plug is connected to the connection terminal of the electronic keyboard instrument shown in FIG. 4. FIG. [Figure 9] 9 is an enlarged perspective view of a main part of the electronic keyboard instrument shown in FIG. 8, cut away along the arrow CC. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS. As shown in Figures 1 and 2, this electronic keyboard instrument has an instrument case 1. This instrument case 1 is formed in the shape of a long and narrow rectangular box. That is, this instrument case 1 has a top surface 1a, a front surface 1b, a back surface 1c, a bottom surface 1d (see Figure 7) which is the back surface, and both side surfaces 1e.

[0010] In this case, as shown in Figures 1 and 2, the top surface 1a and the bottom surface 1d (see Figure 7) are located in the up-down direction of the musical instrument case 1. The front surface 1b and the back surface 1c are located in the front-rear direction of the musical instrument case 1. The side surfaces 1e on both sides are located on both sides of the musical instrument case 1 in the left-right direction, which is the longitudinal direction.

[0011] 1 and 2, an opening 3 is provided on the top surface 1a of the musical instrument case 1 to expose the keyboard section 2. The opening 3 is provided over an area of ​​the top surface 1a of the musical instrument case 1 excluding the rear side in the front-to-rear direction and both sides in the longitudinal direction of the musical instrument case 1, and over an area of ​​the front surface 1b excluding the lower side in the up-down direction.

[0012] 1 and 2, the keyboard section 2 has a plurality of white keys 2a and a plurality of black keys 2b arranged in musical scale order, and is configured so that the top faces and upper sides of the front ends of the plurality of white keys 2a and the plurality of black keys 2b are exposed from the opening 3. Also, as shown in FIG. 3, the keyboard section 2 is arranged on a keyboard chassis 4 provided in the musical instrument case 1 so that the plurality of white keys 2a and the plurality of black keys 2b rotate in response to key depression.

[0013] In this case, a hammer member 2c having a weight is rotatably attached to each of the white keys 2a and the black keys 2b as shown in Fig. 3. As a result, when each of the white keys 2a and the black keys 2b is pressed, the hammer members 2c rotate and the weights of the hammer members 2c apply a load to the pressed white keys 2a and black keys 2b, providing a key touch similar to that of an acoustic piano.

[0014] 3, the keyboard section 2 is provided with a plurality of switch sections 5 corresponding to the plurality of white keys 2a and the plurality of black keys 2b, respectively. Thus, the keyboard section 2 is configured such that when the plurality of white keys 2a and the plurality of black keys 2b are pressed, one of the plurality of switch sections 5 is switched by the pressed white key 2a or black key 2b.

[0015] That is, as shown in Fig. 3, the multiple switch sections 5 are provided on a switch board 6 provided on the keyboard chassis 4 in correspondence with the multiple white keys 2a and the multiple black keys 2b. The multiple switch sections 5 are configured to output switch signals for emitting musical tones from speakers (not shown) when switched on by pressing the white keys 2a and black keys 2b. The speakers may be provided, for example, on both sides in the longitudinal direction of the rear surface 1c of the musical instrument case 1 shown in Fig. 2.

[0016] 1 and 2, various switches 9 necessary for the instrument functions, such as a power switch and a volume switch, are provided on one of both longitudinal sides of the instrument case 1, that is, the left side in Fig. 1, and on the top surface 1a of the instrument case 1. Furthermore, a music stand member 7 is detachably attached to the back surface 1c of the instrument case 1, and a connection mounting member 10 having multiple connection terminals 8 mounted thereon is also attached.

[0017] 1 to 4, the music stand member 7 comprises a music stand main body 11 and two support parts 12 that support both sides in the longitudinal direction of the music stand main body 11, and is configured so that the support parts 12 are attached to two music stand attachment parts 13 provided on the back surface 1c of the musical instrument case 1. The music stand main body 11 is adapted to stand music sheets, a tablet terminal, etc., and comprises a placement part 14 and an inclined plate 15.

[0018] 1 to 3, the mounting portion 14 is formed to have a length that is approximately half the length of the musical instrument case 1 in the longitudinal direction, and is configured to be arranged on the back surface 1c of the musical instrument case 1. That is, the mounting portion 14 is attached to the support portion 12 together with an inclined plate 15 by screws 16, and is configured to be attached to the music stand mounting portion 13 provided on the back surface 1c of the musical instrument case 1 by the support portion 12.

[0019] 1 to 3, the inclined plate 15 is a rectangular flat plate whose longitudinal length is the same as that of the mounting portion 14 and whose vertical length is about half of the longitudinal length. The inclined plate 15 is attached to the support portion 12 together with the mounting portion 14 by screws 16 in a state in which it is slightly inclined toward the rear of the musical instrument case 1.

[0020] 3, the support portion 12 includes a rod-shaped support insertion portion 12a that is inserted into the mounting hole 13a of the music stand mounting portion 13, and a support mounting portion 12b to which the music stand main body portion 11 is attached. The support mounting portion 12b extends obliquely downward from the upper end of the support insertion portion 12a located on the back surface 1c of the musical instrument case 1 toward the rear of the musical instrument case 1, and then extends obliquely upward from the extended tip, so that the music stand main body portion 11 can be attached to the obliquely upward extending portion.

[0021] 3 to 5, the music stand attachment parts 13 are attached by inserting the support parts 12 of the music stand member 7 in a state inclined toward the rear of the musical instrument case 1, and are provided on both sides in the longitudinal direction of the back surface 1c of the musical instrument case 1. That is, the music stand attachment parts 13 are provided at positions distributed over equal lengths on both sides in the longitudinal direction based on the longitudinal middle part of the back surface 1c of the musical instrument case 1, and are located on both sides of the back surface 1c of the musical instrument case 1 corresponding to both sides of the music stand main body 11 in the longitudinal direction.

[0022] Each of these music stand attachment parts 13 is made of a hard synthetic resin such as ABS resin, as shown in Figures 3 and 5. These music stand attachment parts 13 are inserted into the instrument case 1 through attachment holes 18a in a back panel 18 provided on the back surface 1c of the instrument case 1, and are configured to be fixed in this state to a fixing member 19 fixed to the interior of the instrument case 1 with a number of screws 19a.

[0023] In this case, as shown in Figures 3 to 5, the music stand attachment part 13 has an attachment hole 13a, into which the support part 12 is inserted from the rear surface 1c side of the musical instrument case 1, which is inclined obliquely in the front-rear direction from the upper side to the lower side. In other words, this attachment hole 13a is formed so that the support part 12 of the music stand member 7 is inserted in a state inclined toward the rear of the musical instrument case 1. The inner diameter of this attachment hole 13a is formed slightly larger than the outer diameter of the support insertion part 12a of the support part 12.

[0024] 3 to 5, the opening of mounting hole 13a is formed larger than the outer diameter of support insertion portion 12a on the insertion side into which support insertion portion 12a of support portion 12 is inserted. In this case, the opening of mounting hole 13a is formed in a substantially elliptical shape that is long in the vertical direction on rear surface 1c of instrument case 1. In this case, edge portion 13b of mounting hole 13a is formed such that the area of ​​the lower side of the substantially elliptical shape that is long in the vertical direction on rear surface 1c of instrument case 1 is wide.

[0025] 3 to 5, edge 13b of the opening of mounting hole 13a is located on the edge of the inner circumference of attachment hole 18a of rear panel 18 of instrument case 1, and in this state is formed to protrude as a leg from rear surface 1c of instrument case 1. Thus, instrument case 1 is configured to be positioned upright with rear surface 1c of instrument case 1 as the bottom surface by edge 13b of mounting hole 13a of music stand attachment portion 13, as shown in FIG.

[0026] That is, as shown in Figures 3 to 5 and 7, the edge 13b of the mounting hole 13a of the music stand mounting portion 13 provided on each side of the back surface 1c of the instrument case 1 is formed in an approximately elliptical shape that is long in the vertical direction on the back surface 1c of the instrument case 1, so that when the instrument case 1 is placed on a support surface T such as a table with the back surface 1c of the instrument case 1 as the base and stood up, the edge 13b becomes the leg.

[0027] On the other hand, the connection mounting member 10 having the multiple connection terminals 8 is attached to a back plate 18 provided on the back plate 1c of the musical instrument case 1, as shown in Figures 2, 4, and 6. This back plate 18 is provided with rectangular connection holes 18b. In this case, the connection holes 18b of the back plate 18 are formed in a long and narrow rectangular shape along the longitudinal direction of the music stand member 7 at a portion of the back plate 18 located below the music stand member 7. In other words, the connection holes 18b are distributed at equal lengths in the longitudinal direction, based on the longitudinal middle portion of the back plate 1c of the musical instrument case 1.

[0028] 4 and 6, the connection mounting member 10 includes an exposed mounting portion 10a disposed in the connection hole 18b of the rear plate 18, and a fixed mounting portion 10b attached to the inner surface of the rear plate 18 and to the bottom of the lower surface 1d, which is the rear surface of the musical instrument case 1. The exposed mounting portion 10a is formed in a generally flat rectangular shape that is long along the longitudinal direction of the rear plate 18.

[0029] 4 and 6, the exposed mounting portion 10a is formed so that its longitudinal length is shorter than the longitudinal length of the music stand member 7. In this case, like the connection holes 18b, the exposed mounting portion 10a is distributed at equal lengths in the longitudinal direction with the longitudinal center of the rear surface 1c of the musical instrument case 1 as the reference.

[0030] 4 and 6, the upper edge and both longitudinal side edges of this exposed mounting portion 10a are provided with protrusions 20 that protrude outward from the rear surface 1c of the rear panel 18 of the musical instrument case 1. These protrusions 20 are configured to protrude as legs from the rear surface 1c of the musical instrument case 1 by the same length as the protruding length of the edge 13b of the mounting hole 13a of the music stand mounting portion 13 that protrudes from the rear surface of the musical instrument case 1.

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

[0032] 4, 6, and 8, the protrusion 20 is located between the music stand attachment parts 13 provided on both sides in the longitudinal direction of the rear surface 1c of the musical instrument case 1. The protrusion 20 is located on the rear surface 1c of the musical instrument case 1, closer to the bottom surface 1d, which is the back surface of the musical instrument case 1, than the music stand attachment parts 13. In other words, the music stand attachment parts 13 are located on the rear surface 1c of the musical instrument case 1, closer to the top surface 1a of the musical instrument case 1 than the connection attachment members 10.

[0033] As a result, when the instrument case 1 is placed upright on a support surface T such as a table with the rear surface 1c as the bottom surface, as shown in Figure 7, it is configured to be supported at three points (three locations): the edges 13b of each mounting hole 13a of the two music stand mounting portions 13 on both sides of the rear surface 1c of the instrument case 1 and the protrusions 20 of the connecting mounting member 10.

[0034] Incidentally, a plurality of connection terminals 8 are provided in a state of being arranged along the longitudinal direction on the exposed mounting portion 10a of the connection mounting member 10, as shown in Figures 4, 8 and 9. The plurality of connection terminals 8 are configured so that connection parts such as communication chip parts 21, plugs 22, and jacks (not shown) can be connected to them.

[0035] In this case, as shown in Figures 8 and 9, plug 22 is L-shaped and includes a plug portion 22a that is inserted into connection terminal 8, a connection line 22b that extends perpendicularly from plug portion 22a, and a cover portion 22c that covers plug portion 22a and connection line 22b in an L-shape except for the tip of plug portion 22a.

[0036] 8 and 9, a plug recess 23 in which the cover portion 22c of the plug 22 is disposed is provided in the exposed mounting portion 10a of the connection mounting member 10 corresponding to the connection terminal 8 to which the L-shaped plug 22 is connected, recessed one step lower from the outer surface of the exposed mounting portion 10a. The plug recess 23 is provided wide enough to accommodate the cover portion 22c that covers the plug portion 22a and can be rotatably disposed therein.

[0037] 4 and 9, a restricting protrusion 23a that restricts the direction of the connection wire 22b is provided in the plug recess 23. The restricting protrusion 23a restricts the cover portion 22c to tilt in a direction that tilts the connection wire 22b extending in a perpendicular direction from the plug portion 22a diagonally downward. The restricting protrusion 23a is formed so that the length of the restricting protrusion 23a in the direction protruding from the inside of the plug recess 23 to the outside is the same as the protruding length of the protrusion 20 of the connection mounting member 10.

[0038] As a result, when the plug portion 22a is inserted into and connected to the connection terminal 8 of the connection mounting member 10 and the underside 1d of the instrument case 1 is placed on a mounting surface T such as a table, as shown in Figures 8 and 9, the L-shaped plug 22 is configured to prevent the connection wire 22b from abutting perpendicularly against the mounting surface T, thereby preventing damage to the connection terminal 8.

[0039] 7, a battery cover 25 is provided in an openable and closable manner on the bottom surface 1d, which is the rear surface of the instrument case 1. Although not shown, this battery cover 25 is configured to open and close a battery storage section that stores a plurality of batteries for supplying power to the circuit section of the electronic keyboard instrument.

[0040] Next, the operation of such an electronic keyboard instrument will be described. When playing 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 parts 12 are placed on both sides of the mounting part 14 of the music stand main body 11, and in this state, the inclined plate 15 of the music stand main body 11 is attached together with the mounting part 14 to the support mounting part 12b of the support part 12 with the screws 16. In this way, the music stand member 7 is assembled.

[0041] This music stand member 7 is attached to the back surface 1c of the musical 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 mounting portions 13 provided on both sides of the back surface 1c of the musical 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 inserted into the mounting holes 13a of the two music stand mounting portions 13. As a result, the placement portion 14 of the music stand member 7 is disposed on the back surface 1c of the musical instrument case 1 with the inclined plate 15 of the music stand member 7 inclined toward the rear of the musical instrument case 1.

[0042] In this state, a sheet of music or a tablet terminal is placed against the music stand member 7. Then, the switch 9 on the instrument case 1 is operated to turn on the power and adjust the volume, etc. This makes the electronic keyboard instrument playable. In this state, the multiple white keys 2a and multiple black keys 2b on the keyboard section 2 are pressed. The pressed white keys 2a and black keys 2b then rotate, causing the hammer members 2c to rotate against the weight of the weight.

[0043] At this time, a load is applied to the depressed white key 2a and black key 2b by the weight of the hammer member 2c. This provides a key touch similar to that of an acoustic piano. At this time, the depressed white key 2a and black key 2b press the switch section 5 to operate the switch. As a result, a musical tone corresponding to the depressed white key 2a and black key 2b is 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, there is no need to turn the instrument case 1 upside down and place it on a supporting surface T such as a table. Instead, the 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 the supporting surface T such as a table with the back surface 1c of the instrument case 1 as the bottom surface.

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

[0046] In this case, the music stand attachment parts 13 are provided on the back surface 1c of the musical instrument case 1, closer to the top surface 1a of the musical instrument case 1 than the connecting attachment member 10. Therefore, when the musical instrument case 1 is placed upright with the back surface 1c serving as the bottom surface, it is supported at three points: the edges 13b of the attachment holes 13a of the two music stand attachment parts 13 located on both sides of the back surface 1c of the musical instrument case 1, and the protrusions 20 of the connecting attachment member 10.

[0047] This allows the instrument case 1 to be stably stood on a table or other supporting surface T with the rear surface 1c of the instrument case 1 as the bottom surface. Therefore, when performing maintenance work such as battery replacement or repair, there is no need to turn the instrument case 1 upside down and place it on the table or other supporting surface T, and the maintenance work can be performed with the instrument case 1 stood on the table or other supporting surface T with the rear surface 1c of the instrument case 1 as the bottom surface.

[0048] Next, a case where the electronic keyboard instrument is used by placing the underside 1d of the electronic keyboard instrument on a placement surface T such as a tabletop and inserting the L-shaped plug 22 into the connection terminal 8 of the connection mounting member 10 will be described. In this case, a plug recess 23 in which the cover portion 22c of the plug 22 is arranged is recessed one step lower in the exposed mounting portion 10a of the connection mounting member 10, and a regulating protrusion portion 23a for regulating the orientation of the connection wire 22b of the plug 22 is provided within this plug recess 23 so as to protrude from within the plug recess 23 toward the outside.

[0049] For this reason, when the L-shaped plug 22 is inserted into the connection terminal 8 provided corresponding to the plug recess 23 of the connection mounting member 10, the restricting protrusion 23a provided in the plug recess 23 restricts the connection line 22b extending perpendicularly from the plug portion 22a of the plug 22 to be tilted diagonally downward, thereby preventing the connection line 22b of the plug 22 from abutting perpendicularly against the placement surface T such as a tabletop, and the plug portion 22a prevents damage to the connection terminal 8 provided in the connection mounting member 10.

[0050] Thus, this electronic keyboard instrument comprises an instrument case 1 in which the keyboard section 2 is provided, 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 the support section 12 of the music stand member 7 can be attached, and since the edge section 13b of the mounting hole 13a of the music stand mounting section 13 protrudes from the back surface 1c of the instrument case 1 as a leg, there is no need to turn the instrument case 1 upside down, and the instrument case 1 can be easily stood up with the back surface 1c of the instrument case 1 as the base.

[0051] In other words, in this electronic keyboard instrument, edge 13b of mounting hole 13a of music stand mounting portion 13 provided on rear surface 1c of instrument case 1 protrudes as a leg from rear surface 1c of instrument case 1, so that when instrument case 1 is stood up with rear surface 1c of instrument case 1 as the bottom surface, edge 13b of mounting hole 13a of music stand mounting portion 13 can be positioned as a leg on supporting surface T such as a table top.

[0052] As a result, with this electronic keyboard instrument, even if the weight of the entire instrument is heavy, there is no need to turn the instrument case 1 upside down, and the instrument case 1 can be simply and easily stood up with the back surface 1c of the instrument case 1 as the bottom surface. That is, with this electronic keyboard instrument, because the instrument case 1 is formed in a substantially rectangular box shape, there is no need to turn the instrument case 1 upside down, and the instrument case 1 can be simply and easily stood up with the back surface 1c of the instrument case 1 as the bottom surface.

[0053] In this case, in this electronic keyboard instrument, the instrument case 1 stands up with the back surface 1c of the instrument case 1 serving as the bottom surface by the edge 13b of the mounting hole 13a of the music stand mounting portion 13, so that when the instrument case 1 is stood up, the edge 13b of the mounting hole 13a of the music stand mounting portion 13 can be used as a leg to easily place the instrument case 1 on a placement surface T such as a table. This eliminates the need to turn the instrument case 1 upside down when performing maintenance such as battery replacement or repair, so even if the instrument is heavy overall, the instrument case 1 can be easily stood up and maintenance work can be performed smoothly.

[0054] In addition, in this electronic keyboard instrument, the music stand mounting portions 13 are provided on both longitudinal sides of the back surface 1c of the instrument case 1, so that when the instrument case 1 is stood up with the back surface 1c of the instrument case 1 as the bottom surface, the edge portions 13b of the mounting holes 13a of the music stand mounting portions 13 provided on both longitudinal sides of the back surface 1c of the instrument case 1 allow the instrument case 1 to be stood up and placed in a stably state on a supporting surface T such as a table.

[0055] In other words, in this electronic keyboard instrument, the music stand mounting portions 13 are provided at positions that are distributed at equal lengths on both the left and right sides based on the longitudinal middle part of the back surface 1c of the instrument case 1, so that when the instrument case 1 is stood up 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 portion 13 allows the instrument case 1 to be stood up and placed in a stably state on a supporting surface T such as a table top.

[0056] Furthermore, in this electronic keyboard instrument, edge 13b of mounting hole 13a of music stand mounting portion 13 is formed into an approximately elliptical shape that is long in the vertical direction on the back surface 1c of instrument case 1, so that when instrument case 1 is stood up with back surface 1c of instrument case 1 as the bottom surface, edge 13b, which is formed into an approximately elliptical shape, allows instrument case 1 to be stood up and placed stably on supporting surface T such as a table top.

[0057] In this case, in this electronic keyboard instrument, edge 13b of mounting hole 13a of music stand mounting portion 13 is formed so that the lower area of ​​the approximately elliptical shape that is long in the vertical direction on the back surface 1c of instrument case 1 is wide, so that when instrument case 1 is stood up with back surface 1c of instrument case 1 as the bottom surface, the wide area of ​​the approximately elliptical lower side of edge 13b allows instrument case 1 to be stood up and placed stably on supporting surface T such as a table top.

[0058] In addition, in this electronic keyboard instrument, a connection mounting member 10 having a plurality of connection terminals 8 is provided on the back surface 1c of the instrument case 1, and this connection mounting member 10 is provided with a protrusion 20 that protrudes as a leg from the back surface 1c of the instrument case 1 by the same length as the protrusion length of the edge 13b of the mounting hole 13a of the music stand mounting portion 13 that protrudes from the back surface 1c of the instrument case 1.Therefore, the edge 13b of the mounting hole 13a of the music stand mounting portion 13 and the protrusion 20 of the connection mounting member 10 allow the instrument case 1 to be placed upright in a stably standing state on a supporting surface T such as a table top.

[0059] Furthermore, in this electronic keyboard instrument, the protrusion 20 protruding from the back surface 1c of the instrument case 1 has a straight portion along the longitudinal direction of the instrument case 1, so that the edge 13b of the mounting hole 13a of the music stand mounting portion 13 and the straight protrusion 20 of the connecting mounting member 10 allow the instrument case 1 to be placed upright and stable on a mounting surface T such as a table. In other words, the protrusions 20 are distributed to the left and right sides with equal lengths based on the longitudinal middle portion of the back surface 1c of the instrument case 1, so that the instrument case 1 can be placed upright and stable on a mounting surface T such as a table.

[0060] In this case, in this electronic keyboard instrument, the protrusions 20 of the connection mounting member 10 are provided on the upper edge and both side edge portions of the exposed mounting portion 10a of the connection mounting member 10, the upper edge portion being formed in a straight line along the longitudinal direction of the instrument case 1, and the both side edge portions being formed in a straight line along the up-down direction on the back surface 1c of the instrument case 1.Therefore, the edge 13b of the mounting hole 13a of the music stand mounting portion 13 and the protrusions 20 of the connection mounting member 10 allow the instrument case 1 to be positioned upright on a support surface T such as a table top in an even more stable manner, reliably and satisfactorily.

[0061] Furthermore, in this electronic keyboard instrument, when the instrument case 1 is placed upright with the back surface 1c as the base, it is supported by the edges 13b of each mounting hole 13a of the two music stand mounting portions 13 provided on both longitudinal sides of the back surface 1c of the instrument case 1 and by the protrusions 20 of the connecting mounting member 10, which also allows the instrument case 1 to be placed upright and stably on a supporting surface T such as a table top.

[0062] Furthermore, in this electronic keyboard instrument, the protrusion 20 of the connection mounting member 10 is provided between the music stand mounting portions 13 provided on both longitudinal sides of the back surface 1c of the instrument case 1, which also allows the instrument case 1 to be placed upright and in a stable manner on a support surface T such as a table.

[0063] Furthermore, in this electronic keyboard instrument, the music stand mounting portion 13 is located on the back surface 1c of the instrument case 1, closer to the top surface 1a of the instrument case 1 than the connecting mounting member 10, which also allows the instrument case 1 to be placed upright and stably on a supporting surface T such as a table.

[0064] Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and includes the inventions described in the claims and their equivalents. The invention as set forth in the claims of this application is set forth below.

[0065] (Additional Note) The invention described in claim 1 is an electronic musical instrument comprising: an instrument case having a keyboard portion; and a music stand mounting portion provided on the rear surface of the instrument case and having a mounting hole to which a support portion of a music stand component can be attached, wherein the edge of the mounting hole protrudes from the rear surface of the instrument case as a leg.

[0066] The invention described in claim 2 is the electronic musical instrument described in claim 1, characterized in that the instrument case stands upright with the back of the instrument case as the bottom surface by the edge of the mounting hole of the music stand mounting portion.

[0067] The invention described in claim 3 is an electronic musical instrument described in claim 1 or claim 2, characterized in that the music stand mounting portion is provided on both longitudinal sides of the rear surface of the instrument case.

[0068] The invention described in claim 4 is an electronic musical instrument described in any one of claims 1 to 3, characterized in that the edge of the mounting hole of the music stand mounting portion is formed into an approximately elliptical shape that is elongated in the vertical direction on the back surface of the instrument case.

[0069] The invention described in claim 5 is the electronic musical instrument described in claim 4, characterized in that the edge of the mounting hole of the music stand mounting portion is formed with a wider area on the lower side of an approximately elliptical shape that is elongated in the vertical direction on the back surface of the instrument case.

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

[0071] The invention described in claim 7 is the electronic musical instrument described in claim 6, characterized in that when the instrument case is placed upright with the rear surface as the bottom surface, it is supported by the edges of the mounting holes of the two music stand mounting parts located on both sides of the longitudinal direction on the rear surface of the instrument case and the protrusions of the connecting mounting members.

[0072] The invention described in claim 8 is an electronic musical instrument described in claim 6 or claim 7, characterized in that the protrusion portion of the connection mounting member is provided between the music stand mounting portions provided on both longitudinal sides of the rear surface of the instrument case.

[0073] The invention described in claim 9 is an electronic musical instrument described in claim 8, characterized in that the music stand mounting portion is located on the rear surface of the instrument case, closer to the upper surface of the instrument case than the connection mounting member. [Explanation of symbols]

[0074] 1 instrument case 1a Top surface 1b Front 1c back 1d bottom surface 1e Side 2 Keyboard section 2a white key 2b black key 2c Hammer parts 3 Opening 4 Key Chassis 5 Switch section 6 Switch Board 7 Music stand parts 8 Connection terminal 9. Switch 10 Connection and mounting parts 10a Exposed mounting part 10b Mounting and fixing part 11 Music stand main body 12 Support part 12a Support insert 12b Support mounting part 13 Music stand attachment part 13a Mounting hole 13b Edge 14 Placement section 15 Inclined plate 16, 19a Bis 18 Back plate 18a Mounting hole 18b Connection hole 19 Fixing member 20 Protrusion 21 Chip parts 22 Plug 22a plug part 22b connecting line 22c Cover part 23 Plug recess 23a Regulatory protrusion 25 Battery cover T Placement 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 rear 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 rear 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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