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

Background Art

[0002] For example, in an electronic keyboard 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 instrument is configured such that weights are provided for each of the plurality of keys so as to obtain a key touch approximating 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 instrument, when weights are provided for each of the plurality of keys, the weight of the entire instrument increases, so that when performing maintenance work such as battery replacement or repair, the work of inverting the instrument case front to back becomes troublesome.

[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 includes an instrument case provided with a keyboard section, a connection attachment member provided on the back surface of the instrument case and having connection terminals And a plug recess corresponding to the plug cover portion having a plug portion connected to the connection terminal and a connecting wire extending from the plug portion, and is equipped with At least a portion of the surrounding area of ​​the connecting mounting member is provided with a projection that protrudes from the back of the instrument case as a leg. The plug recess has a restricting projection that restricts the direction of the connecting wire, The protruding length of the restricting projection from the inside of the plug recess to the outside is the same as the protruding length of the projection. It is an electronic musical instrument. [Effects of the Invention]

[0007] According to this invention, there is no need to turn the instrument case inside out, and the instrument case can be easily stood upright with the back surface as the base. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front perspective view showing one embodiment of the present invention applied to an electronic keyboard instrument. [Figure 2] Figure 1 is a perspective view of the electronic keyboard instrument shown, viewed from the rear. [Figure 3] Figure 1 is an enlarged cross-sectional view of the electronic keyboard instrument shown in the line AA. [Figure 4] Figure 2 is a rear perspective view of the electronic keyboard instrument shown with the music stand removed. [Figure 5] Figure 3 is an enlarged cross-sectional view showing the electronic keyboard instrument with the music stand removed. [Figure 6] Figure 4 is an enlarged cross-sectional view of the electronic keyboard instrument shown in the BB arrow. [Figure 7] Figure 4 is a perspective view of the electronic keyboard instrument shown in the image, with the instrument case standing upright with the back surface facing the bottom, as seen from the underside. [Figure 8] Figure 4 is a rear perspective view showing the electronic keyboard instrument with a plug connected to its connection terminal. [Figure 9] Figure 8 is an enlarged perspective view of the main part of the electronic keyboard instrument shown, broken in the line CC. [Modes for carrying out the invention]

[0009] Hereinafter, an embodiment of this invention applied to an electronic keyboard instrument will be described with reference to Figures 1 to 9. As shown in Figures 1 and 2, this electronic keyboard instrument is equipped with an instrument case 1. This instrument case 1 is formed in the shape of a long, narrow rectangular box. Specifically, this instrument case 1 has a top surface 1a, a front surface 1b, a back surface 1c, a bottom surface 1d (see Figure 7), and two side surfaces 1e.

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

[0011] As shown in Figures 1 and 2, the top surface 1a of the instrument case 1 is provided with an opening 3 for exposing the keyboard section 2. This opening 3 extends across the area of ​​the top surface 1a of the instrument case 1, excluding the rear side in the front-to-back direction and both sides in the longitudinal direction of the instrument case 1, and across the area of ​​the front surface 1b, excluding the lower side in the vertical direction.

[0012] As shown in Figures 1 and 2, the keyboard section 2 consists of multiple white keys 2a and multiple black keys 2b arranged in musical scale order, with the upper surfaces and front ends of each of the multiple white keys 2a and multiple black keys 2b being exposed through the opening 3. Furthermore, as shown in Figure 3, the keyboard section 2 is arranged on a keyboard chassis 4 provided inside the instrument case 1, with the multiple white keys 2a and multiple black keys 2b rotating in response to key presses.

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

[0014] Also, as shown in FIG. 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. Thereby, when each of the plurality of white keys 2a and the plurality of black keys 2b is pressed, the keyboard section 2 is configured such that any one of the plurality of switch sections 5 performs a switch operation by the pressed white keys 2a and black keys 2b.

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

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

[0017] As shown in Figures 1 to 4, the music stand member 7 comprises a music stand main body 11 and two support parts 12 that support both sides of the music stand main body 11 in the longitudinal direction. The support parts 12 are configured to be attached to two music stand mounting parts 13 provided on the back surface 1c of the instrument case 1. The music stand main body 11 is a device on which sheet music or tablet devices can be propped up, and includes a mounting part 14 and an inclined plate 15.

[0018] As shown in Figures 1 to 3, the mounting section 14 is formed to be approximately half the length of the instrument case 1 in the longitudinal direction and is configured to be positioned on the back surface 1c of the instrument case 1. Specifically, this mounting section 14 is attached to the support section 12 together with the inclined plate 15 by screws 16, and is configured to be attached by the support section 12 to the music stand mounting section 13 provided on the back surface 1c of the instrument case 1.

[0019] As shown in Figures 1 to 3, the inclined plate 15 is a rectangular flat plate, with a length in the longitudinal direction being the same as the length in the longitudinal direction of the mounting part 14, and a length in the vertical direction being approximately half the length in the longitudinal direction. This inclined plate 15 is attached to the support part 12 together with the mounting part 14 by screws 16, at a slight incline toward the rear of the instrument case 1.

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

[0021] As shown in Figures 3 to 5, the music stand mounting section 13 is installed by inserting the support section 12 of the music stand member 7 into the instrument case 1 with the support section tilted toward the rear, and is provided on both sides of the longitudinal direction of the back surface 1c of the instrument case 1. In other words, these music stand mounting sections 13 are provided at positions that are distributed with equal lengths on both sides of the longitudinal direction with respect to the middle of the longitudinal direction of the back surface 1c of the instrument case 1, and are located on both sides of the back surface 1c of the instrument case 1, corresponding to the longitudinal sides of the music stand main body 11.

[0022] Each of these music stand mounting sections 13 is made of a hard synthetic resin such as ABS resin, as shown in Figures 3 and 5. These music stand mounting sections 13 are inserted into the instrument case 1 through mounting holes 18a in the back plate 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 inside the instrument case 1 by a plurality of screws 19a.

[0023] In this case, as shown in Figures 3 to 5, the music stand mounting section 13 has a mounting hole 13a into which the support section 12 is inserted from the back 1c side of the instrument case 1, which is inclined diagonally in the front-to-back direction from the top to the bottom. That is, this mounting hole 13a is formed so that the support section 12 of the music stand member 7 is inserted in a tilted position toward the rear of the instrument case 1. The inner diameter of this mounting hole 13a is formed to be slightly larger than the outer diameter of the support insertion section 12a of the support section 12.

[0024] Furthermore, as shown in Figures 3 to 5, the opening of the mounting hole 13a is formed larger than the outer diameter of the support insertion portion 12a on the insertion side into which the support insertion portion 12a of the support portion 12 is inserted. In this case, the opening of the mounting hole 13a is formed in a substantially elliptical shape that is elongated vertically on the back surface 1c of the instrument case 1. In this case, the edge portion 13b of the mounting hole 13a is formed in a substantially elliptical shape that is elongated vertically on the back surface 1c of the instrument case 1, with a larger area on the lower side.

[0025] As shown in Figures 3 to 5, the edge 13b of the opening of the mounting hole 13a is positioned on the inner edge of the mounting hole 18a of the back panel 18 of the instrument case 1, and in this state is formed to protrude from the back surface 1c of the instrument case 1 as a leg. As a result, as shown in Figure 7, the instrument case 1 is configured to stand upright with the back surface 1c as its bottom surface, thanks to the edge 13b of the mounting hole 13a of the music stand mounting part 13.

[0026] In other words, as shown in Figures 3 to 5 and 7, the instrument case 1 has mounting holes 13a for the music stand mounting parts 13 provided on both sides of the back surface 1c, and the edges 13b of these holes are formed in a roughly elliptical shape that is elongated vertically on the back surface 1c of the instrument case 1. Therefore, when the instrument case 1 is placed on a surface T such as a table with the back surface 1c as the base and stands upright, the edges 13b are configured to act as legs.

[0027] On the other hand, the connection mounting member 10, which has multiple connection terminals 8, is attached to a back panel 18 provided on the back surface 1c of the instrument case 1, as shown in Figures 2, 4, and 6. This back panel 18 is provided with rectangular connection holes 18b. In this case, the connection holes 18b of the back panel 18 are formed in an elongated rectangular shape along the longitudinal direction of the music stand member 7 at the location of the back panel 18 below the music stand member 7. That is, these connection holes 18b are distributed with equal lengths along the longitudinal direction, with the middle of the longitudinal direction of the back surface 1c of the instrument case 1 as the reference point.

[0028] As shown in Figures 4 and 6, the connecting mounting member 10 comprises a mounting exposed portion 10a positioned in the connecting hole 18b of the back panel 18, and a mounting fixing portion 10b attached to the inner surface of the back panel 18 and the bottom surface 1d, which is the back surface of the instrument case 1. The mounting exposed portion 10a is formed in a long, rectangular, substantially flat shape along the longitudinal direction of the back panel 18.

[0029] As shown in Figures 4 and 6, the mounting exposed portion 10a is formed with a length in its longitudinal direction that is shorter than the longitudinal length of the music stand member 7. In this case, the mounting exposed portion 10a, like the connection hole 18b, is distributed with equal lengths in the longitudinal direction, based on the middle of the longitudinal direction on the back surface 1c of the instrument case 1.

[0030] As shown in Figures 4 and 6, the upper edge and each of the longitudinal side edges of the mounting exposed portion 10a are provided with protrusions 20 that project outward from the back surface 1c of the back panel 18 of the instrument case 1. These protrusions 20 are configured to project outward from the back surface 1c of the instrument case 1 as legs, with the same length as the projection length of the edge 13b of the mounting hole 13a of the music stand mounting portion 13 that protrudes from the back surface of the instrument case 1.

[0031] As shown in Figures 4 and 6, the projections 20 on each side edge in the longitudinal direction of the mounting exposed portion 10a are inclined toward the bottom surface 1d, which is the back surface of the instrument case 1, and the projection length of a portion of each side edge toward the bottom surface 1d is shorter than that of the other projections. Note that the projections 20 on each side edge in the longitudinal direction of the mounting exposed portion 10a do not need to be inclined, and the projection length of the edge 13b of the mounting hole 13a of the music stand mounting portion 13 is the same as the projection length of the back surface 1c of the instrument case 1.

[0032] Furthermore, as shown in Figures 4, 6, and 8, the projection 20 is positioned between the music stand mounting portions 13 provided on both sides in the longitudinal direction on the back surface 1c of the instrument case 1. The projection 20 is positioned on the back surface 1c of the instrument case 1, closer to the bottom surface 1d, which is the back surface of the instrument case 1, than the music stand mounting portions 13. In other words, the music stand mounting portions 13 are positioned 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.

[0033] As a result, when the instrument case 1 is placed upright on a surface T such as a table with its back surface 1c as the base, as shown in Figure 7, it is supported at three points (three locations) between the edges 13b of each mounting hole 13a of the two music stand mounting parts 13 on both sides of the back surface 1c of the instrument case 1 and the projection 20 of the connecting mounting member 10.

[0034] Incidentally, as shown in Figures 4, 8, and 9, the mounting exposed portion 10a of the connection mounting member 10 is provided with a plurality of connection terminals 8 arranged along its longitudinal direction. The plurality of connection terminals 8 are configured to be connected to connection components such as communication chip components 21, plugs 22, and jacks (not shown).

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

[0036] As shown in Figures 8 and 9, the mounting exposed portion 10a of the connection mounting member 10, which corresponds to the connection terminal 8 to which the L-shaped plug 22 is connected, has a plug recess 23 where the cover portion 22c of the plug 22 is positioned, recessed one level lower than the outer surface of the mounting exposed portion 10a. This plug recess 23 is wide enough to accommodate the cover portion 22c that covers the plug portion 22a in a rotatable position.

[0037] As shown in Figures 4 and 9, a restricting projection 23a is provided within the plug recess 23 to restrict the direction of the connecting wire 22b. This restricting projection 23a restricts the cover portion 22c to tilt in a direction that causes the connecting wire 22b, which extends perpendicularly from the plug portion 22a, to tilt diagonally downward. The length of this restricting projection 23a in the direction that it protrudes outward from inside the plug recess 23 is the same as the protruding length of the projection 20 of the connection mounting member 10.

[0038] As a result, the L-shaped plug 22 is configured such that, as shown in Figures 8 and 9, when the plug portion 22a is inserted into the connection terminal 8 of the connection mounting member 10 and the lower surface 1d of the instrument case 1 is placed on a mounting surface T such as a table, the connecting wire 22b does not come into contact perpendicularly with the mounting surface T, thereby preventing damage to the connection terminal 8.

[0039] Furthermore, as shown in Figure 7, a battery cover 25 is provided on the bottom surface 1d of the instrument case 1, which is the underside. This battery cover 25 is configured to open and close a battery compartment, which houses multiple batteries for supplying power to the circuitry of the electronic keyboard instrument, although it is not shown in the figure.

[0040] Next, I will explain the function of such electronic keyboard instruments. To play this electronic keyboard instrument, first attach the music stand member 7 to the back 1c of the instrument case 1. Before doing so, assemble the music stand member 7. Specifically, position the support parts 12 on both sides of the mounting part 14 of the music stand body 11, and then attach the inclined plate 15 of the music stand body 11 to the support mounting part 12b of the support part 12 together with the mounting part 14 using screws 16. This completes the assembly of the music stand member 7.

[0041] The music stand member 7 is attached to the back surface 1c of the instrument case 1. At this time, the two support parts 12 on both sides of the music stand member 7 are attached to the two music stand mounting parts 13 provided on both sides of the back surface 1c of the instrument case 1. In this case, the support insertion parts 12a of the two support parts 12 on both sides of the music stand member 7 are inserted into the respective mounting holes 13a of the two music stand mounting parts 13. As a result, the inclined plate 15 of the music stand member 7 is tilted toward the rear of the instrument case 1, and the mounting part 14 of the music stand member 7 is positioned on the back surface 1c of the instrument case 1.

[0042] In this state, place the sheet music or tablet device on the music stand member 7. Then, operate the switch 9 on the instrument case 1 to turn on the power and adjust the volume, etc. This makes the electronic keyboard instrument ready to play. In this state, press the multiple white keys 2a and multiple black keys 2b on the keyboard section 2. When the white keys 2a and black keys 2b are pressed, they rotate, causing the hammer member 2c to rotate against the weight of the counterweight.

[0043] At this time, the pressed white key 2a and black key 2b are subjected to a load from the hammer member 2c. This provides a key touch that approximates the feel of an acoustic piano. Also at this time, the pressed white key 2a and black key 2b press against the switch unit 5, activating the switch. As a result, musical tones corresponding to the pressed white key 2a and black key 2b are emitted from the speaker (not shown).

[0044] Incidentally, when performing maintenance work such as battery replacement or repairs on this electronic keyboard instrument, it is not necessary to turn the instrument case 1 upside down and place it on a surface T such as a tabletop. The music stand member 7 can be removed from the back 1c of the instrument case 1, and the instrument case 1 can be stood upright on a surface T such as a tabletop with the back 1c as the base.

[0045] In other words, when the 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 music stand mounting portion 13 and the projection 20 of the connecting mounting member 10 protrude and are exposed on the back surface 1c of the instrument case 1 with the same projection length. In this case, the music stand mounting portions 13 are located on both sides of the back surface 1c of the instrument case 1, and the connecting mounting member 10 is positioned between these music stand mounting portions 13.

[0046] In this case, the music stand mounting section 13 is positioned 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. Therefore, when the instrument case 1 is placed upright with its back surface 1c as the bottom surface, it is supported at three points: the edges 13b of each mounting hole 13a of the two music stand mounting sections 13 located on both sides of the back surface 1c of the instrument case 1, and the projection 20 of the connecting mounting member 10.

[0047] This allows the instrument case 1 to stand upright stably on a surface T, such as a table, with its back surface 1c as the base. Therefore, when performing maintenance work such as battery replacement or repairs, there is no need to turn the instrument case 1 upside down and place it on the surface T, such as a table. Maintenance work can be performed with the instrument case 1 standing upright on the surface T, such as a table, with its back surface 1c as the base.

[0048] Next, we will describe the case in which the lower surface 1d of this electronic keyboard instrument is placed on a mounting surface T such as a tabletop, and the L-shaped plug 22 is inserted into the connection terminal 8 of the connection mounting member 10 for use. In this case, a plug recess 23 is provided in the mounting exposed portion 10a of the connection mounting member 10, with the cover portion 22c of the plug 22 positioned in a recessed area at a lower level. Within this plug recess 23, a restricting projection 23a is provided, protruding from inside the plug recess 23 toward the outside, to restrict the direction of the connecting wire 22b of the plug 22.

[0049] Therefore, when inserting the L-shaped plug 22 into the connection terminal 8 provided in the plug recess 23 of the connection mounting member 10, the restricting projection 23a provided in the plug recess 23 restricts the connection wire 22b extending perpendicularly from the plug portion 22a of the plug 22 to be directed diagonally downward, causing the cover portion 23c to tilt. This prevents the connection wire 22b of the plug 22 from coming into contact perpendicularly with the mounting surface T such as a tabletop, and prevents damage to the connection terminal 8 provided on the connection mounting member 10 by the plug portion 22a.

[0050] Thus, this electronic keyboard instrument comprises an instrument case 1 on 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, having mounting holes 13a to which the support section 12 of the music stand member 7 can be attached. The edges 13b of the mounting holes 13a of the music stand mounting section 13 protrude from the back surface 1c of the instrument case 1 as legs, eliminating the need to turn the instrument case 1 upside down and allowing the instrument case 1 to be easily stood upright with the back surface 1c as the bottom surface.

[0051] In other words, in this electronic keyboard instrument, the edges 13b of the mounting holes 13a of the music stand mounting section 13, which are provided on the back surface 1c of the instrument case 1, protrude from the back surface 1c of the instrument case 1 as legs. Therefore, when the instrument case 1 is stood upright with the back surface 1c as the base, the edges 13b of the mounting holes 13a of the music stand mounting section 13 can be positioned as legs on a surface T such as a table.

[0052] As a result, even if the overall weight of this electronic keyboard instrument is heavy, there is no need to turn the instrument case 1 inside out, and the instrument case 1 can be easily and readily stood up with its back surface 1c as the base. In other words, since the instrument case 1 of this electronic keyboard instrument is formed in a nearly rectangular box shape, there is no need to turn the instrument case 1 inside out, and the instrument case 1 can be easily and readily stood up with its back surface 1c as the base.

[0053] In this case, with this electronic keyboard instrument, the instrument case 1 stands upright with its back surface 1c as the base, thanks to the edge 13b of the mounting hole 13a of the music stand mounting section 13. Therefore, when standing the instrument case 1 upright, the edge 13b of the mounting hole 13a of the music stand mounting section 13 can be used as legs to easily position it on a tabletop or other surface T. As a result, there is no need to turn the instrument case 1 upside down when performing maintenance such as battery replacement or repairs, so even if the overall weight of the instrument is heavy, the instrument case 1 can be easily stood upright and maintenance work can be performed smoothly.

[0054] Furthermore, in this electronic keyboard instrument, the music stand mounting section 13 is provided on both sides in the longitudinal direction of the back surface 1c of the instrument case 1. Therefore, when the instrument case 1 is stood upright with the back surface 1c as the base, the edges 13b of the mounting holes 13a of the music stand mounting section 13 provided on both sides in the longitudinal direction of the back surface 1c of the instrument case 1 allow the instrument case 1 to be placed upright in a stable state on a surface T such as a table.

[0055] In other words, in this electronic keyboard instrument, the music stand mounting section 13 is provided at positions that are evenly distributed on both the left and right sides, based on the middle of the longitudinal direction on the back surface 1c of the instrument case 1. Therefore, when the instrument case 1 is stood upright with the back surface 1c as the base, the edges 13b of the mounting holes 13a of the music stand mounting section 13 allow the instrument case 1 to be placed upright and stably on a surface T such as a table.

[0056] Furthermore, in this electronic keyboard instrument, the edge 13b of the mounting hole 13a of the music stand mounting section 13 is formed in a nearly elliptical shape that is elongated vertically on the back surface 1c of the instrument case 1. Therefore, when the instrument case 1 is stood upright with the back surface 1c as the base, the nearly elliptical edge 13b allows the instrument case 1 to be placed upright and stably on a surface T such as a tabletop.

[0057] In this case, with this electronic keyboard instrument, the edge 13b of the mounting hole 13a of the music stand mounting part 13 has a wide area on the lower side of a roughly elliptical shape that is elongated vertically on the back surface 1c of the instrument case 1. Therefore, when the instrument case 1 is stood upright with the back surface 1c as the base, the wide area on the lower side of the roughly elliptical edge 13b allows the instrument case 1 to be placed upright and stably on a surface T such as a table.

[0058] Furthermore, in this electronic keyboard instrument, a connection mounting member 10 having multiple connection terminals 8 is provided on the back surface 1c of the instrument case 1. The connection mounting member 10 is provided with a projection 20 that protrudes from the back surface 1c of the instrument case 1 as a leg, with the same length as the projection length of the edge 13b of the mounting hole 13a of the music stand mounting part 13 that protrudes from the back surface 1c of the instrument case 1. Thus, the edge 13b of the mounting hole 13a of the music stand mounting part 13 and the projection 20 of the connection mounting member 10 allow the instrument case 1 to be placed upright and stably on a surface T such as a table.

[0059] Furthermore, in this electronic keyboard instrument, the projection 20 protruding from the back surface 1c of the instrument case 1 has a straight section that runs along the longitudinal direction of the instrument case 1. Therefore, the instrument case 1 can be positioned upright and stably on a surface T such as a table, thanks to the connection between the edge 13b of the mounting hole 13a of the music stand mounting section 13 and the straight projection 20 of the connecting mounting member 10. In other words, the projection 20 is distributed with equal lengths on both the left and right sides, based on the middle of the longitudinal direction of the back surface 1c of the instrument case 1, so that the instrument case 1 can be positioned upright and stably on a surface T such as a table.

[0060] In this case, with this electronic keyboard instrument, the projections 20 of the connecting mounting member 10 are provided on the upper edge and both side edges of the mounting exposed portion 10a of the connecting mounting member 10, with the upper edge formed in a straight line along the longitudinal direction of the instrument case 1, and both side edges formed in a straight line along the vertical direction on the back surface 1c of the instrument case 1. As a result, the edge 13b of the mounting hole 13a of the music stand mounting portion 13 and the projections 20 of the connecting mounting member 10 allow the instrument case 1 to be placed upright on a surface T such as a tabletop in an even more stable and secure manner.

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

[0062] Furthermore, in this electronic keyboard instrument, the projection 20 of the connection mounting member 10 is located between the music stand mounting parts 13 provided on both sides in the longitudinal direction on the back surface 1c of the instrument case 1. This also allows the instrument case 1 to be placed upright and stably on a surface T such as a tabletop.

[0063] Furthermore, in this electronic keyboard instrument, the music stand mounting section 13 is positioned 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. This also allows the instrument case 1 to be placed upright and stably on a surface T such as a tabletop.

[0064] Although one embodiment of the present invention has been described above, the present invention is not limited thereto and includes the invention described in the claims and its equivalents. The invention described in the claims of this application is listed below.

[0065] (Note) The invention described in claim 1 is an electronic musical instrument comprising: a musical instrument case provided with a keyboard section; and a music stand mounting section provided on the back of the musical instrument case and having mounting holes to which a support section for a music stand member can be attached, wherein the edges of the mounting holes of the music stand mounting section protrude from the back of the musical instrument case as legs.

[0066] The invention described in claim 2 is an electronic musical instrument described in claim 1, characterized in that the instrument case stands upright 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 described in claim 3 is an electronic musical instrument according to claim 1 or claim 2, characterized in that the music stand mounting portion is provided on both sides in the longitudinal direction on the back of the instrument case.

[0068] The invention described in claim 4 is an electronic musical instrument according to any one of claims 1 to 3, characterized in that the edge of the mounting hole of the music stand mounting portion is formed in a substantially 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 an electronic musical instrument described in claim 4, characterized in that the edge of the mounting hole of the music stand mounting portion has a larger area on the lower side of a substantially elliptical shape that is elongated vertically on the back surface of the instrument case.

[0070] The invention described in claim 6 is an electronic musical instrument according to any one of claims 1 to 5, wherein a connecting mounting member having a connecting terminal is provided on the back of the instrument case, and the connecting mounting member is provided with a projection that protrudes from the back of the instrument case as a leg, having a length equal to the protrusion length of the edge of the mounting hole of the music stand mounting part protruding from the back of the instrument case.

[0071] The invention described in claim 7 is an electronic musical instrument as described in claim 6, characterized in that when the instrument case is positioned upright with its back 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 in the longitudinal direction on the back surface of the instrument case and the projections of the connecting mounting member.

[0072] The invention described in claim 8 is an electronic musical instrument according to claim 6 or claim 7, characterized in that the projection of the connecting mounting member is provided between the music stand mounting portions provided on both sides in the longitudinal direction on the back of the instrument case.

[0073] The invention described in claim 9 is an electronic musical instrument as described in claim 8, characterized in that the music stand mounting portion is provided on the back surface of the instrument case, positioned on the upper surface side of the instrument case than the connecting 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 component 3 Opening 4-keyboard chassis 5 Switch section 6 Switch board 7 Music stand (sold separately) 8 connection terminals 9 switches 10. Connection and mounting components 10a Mounting exposed part 10b Mounting and fixing part 11. Music stand main body 12 Support part 12a Support insertion part 12b Support mounting section 13. Music stand mounting section 13a Mounting hole 13b Edge 14 Mounting section 15 Inclined plate 16, 19a Bis 18 Back plate 18a Mounting hole 18b Connection hole 19 Fixing member 20 Protrusion 21 Chip components 22 plugs 22a plug section 22b Connection line 22c Cover 23 Plug recess 23a Regulatory protrusion 25 Battery cover T Placement surface

Claims

1. A musical instrument case equipped with a keyboard section, The instrument case comprises a connection terminal provided on the back, and a connection mounting member having a plug recess corresponding to the cover portion of a plug having a plug portion connected to the connection terminal and a connecting wire extending from the plug portion, At least a portion of the surrounding area of ​​the connecting mounting member is provided with a projection that protrudes from the back of the instrument case as a leg. The plug recess has a restricting projection that restricts the direction of the connecting wire, The protruding length of the restricting projection from the inside of the plug recess to the outside is the same as the protruding length of the projection. Electronic musical instrument.

2. The instrument case is raised upright with the back surface of the instrument case as the base by the projection. The electronic musical instrument according to claim 1.

3. The aforementioned protrusions are provided along the side edges on both sides of the connecting mounting member on both sides of the longitudinal direction on the back of the instrument case. The projections on both sides of the aforementioned side edge, extending outwards from the back of the instrument case, are all the same length. The electronic musical instrument according to claim 1.

4. The aforementioned projection is provided along the upper edge of the connecting mounting member, which is aligned with the longitudinal direction on the back of the instrument case. The projection length of the protrusion provided along the upper edge, extending from the back surface of the instrument case, is the same as the protrusion lengths of the projections provided along the side edges on both sides. The electronic musical instrument according to claim 3.

5. The instrument case has two protruding portions on both sides in the longitudinal direction of the back surface, which protrude from the back surface of the instrument case as legs, and the protruding portion of the protrusion has the same protruding length as the protruding length of the protruding portion from the back surface of the instrument case. When the instrument case is positioned upright with its back surface as the base, it is supported by the two protruding portions and the projections. The electronic musical instrument according to claim 2.

6. The aforementioned protruding portion is provided on the back surface of the instrument case, positioned above the aforementioned projection. The electronic musical instrument according to claim 5.

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