CN111081206B - Electronic keyboard instrument and method for manufacturing electronic keyboard instrument - Google Patents

Abstract

An electronic keyboard instrument (1) and a method of manufacturing the same. The electronic keyboard musical instrument has: a keyboard unit provided with a plurality of keys; and a first housing that accommodates the keyboard unit, the first housing including a front panel located on a front side of the keyboard unit and a rear panel located on a rear side of the keyboard unit, a first opening portion that exposes the plurality of keys being provided between the front panel and the rear panel, the rear panel being provided with a component fixing portion having a screw hole for fixing an electronic component by a screw, a position of the component fixing portion in the rear panel and a screwing direction of the screw hole of the component fixing portion being configured such that the first opening portion is located on an extension line of the screwing direction of the screw hole instead of the front panel.

Description

Electronic keyboard musical instrument and method of manufacturing electronic keyboard musical instrument

Technical field

The present invention relates to an electronic keyboard musical instrument and a method of manufacturing the electronic keyboard musical instrument.

Background technique

Conventionally, electronic keyboard musical instruments were formed by accommodating a keyboard unit in a musical instrument case made of resin or the like.

For example, Patent Document 1 discloses a structure in which a musical instrument case (frame in Patent Document 1) housing a keyboard unit (keyboard part in Patent Document 1) is composed of a main body part of the frame and a rear part of the frame. The rear part of the body is mounted on the main body of the frame in a detachable manner.

Existing technical documents:

Patent document 1: Japanese Patent Publication No. 2004-171038

Contents of the invention

Invent the problem to be solved

However, in the structure described in Patent Document 1, the main body part of the housing includes a bottom plate part on which the keyboard part is placed, a key stop part (Japanese: mouth stick part) standing up from the bottom plate part in front of the keyboard part, and a key part on the keyboard part. The left and right side plate portions of the main body stand up from the bottom plate portion. These bottom plate portions, side plate portions and key stop portions are joined and fixed to each other through appropriate joining methods such as screws. In addition, the rear portion of the frame includes a panel portion constituting the rear upper surface of the frame and a back panel portion hanging from the rear edge of the panel portion. The panel portion and the back panel portion are joined and fixed to each other via an appropriate joining method such as screws.

Therefore, the entire musical instrument case (frame) has a large number of components, and many parts are joined by screws and the like.

Furthermore, there are various screw tightening directions, such as joining the side plate portion from the side and joining the front plate portion from the upper side. Therefore, it is difficult to tighten the screws from one direction all at once, and assembly requires time and labor.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electronic keyboard musical instrument excellent in assembly properties and a manufacturing method of the electronic keyboard musical instrument.

means of solving problems

The present invention relates to an electronic keyboard musical instrument, which is provided with: a keyboard unit provided with a plurality of keys; and a first housing that accommodates the keyboard unit and has a front panel located on the front side of the keyboard unit. A panel and a back panel located on the rear side of the keyboard unit, a first opening portion for exposing the plurality of keys is provided between the front panel and the back panel, and the back panel is provided with a component fixing portion , the component fixing portion has a threaded hole for fixing the electronic component with a screw, and the position of the component fixing portion in the back panel and the screw tightening direction of the threaded hole of the component fixing portion are configured as, Not the front panel but the first opening is located on an extension line in the threading direction of the threaded hole.

The present invention also relates to a manufacturing method of an electronic keyboard musical instrument. The electronic keyboard musical instrument is provided with: a keyboard unit equipped with a plurality of keys; a first housing that accommodates the keyboard unit and has a function that allows the plurality of keys to be A first opening where the keys are exposed, a front panel located on the front side of the keyboard unit, and a back panel located on the rear side of the keyboard unit, wherein the back panel is provided with a component fixing portion, and the component fixing portion has A threaded hole for fixing an electronic component with a screw, a position of the component fixing portion in the back panel and a screw tightening direction of the threaded hole in the component fixing portion are configured so that not the front panel The first opening is located on an extension of the thread tightening direction of the threaded hole. When assembling the electronic keyboard instrument, the screw inserted into the threaded hole of the component fixing part is tightened with the thread. The machine linearly approaches from the outside of the first housing through the first opening to perform thread tightening.

Description of the drawings

FIG. 1 is a perspective view of the electronic keyboard musical instrument according to this embodiment.

FIG. 2 is an exploded perspective view of the electronic keyboard musical instrument shown in FIG. 1 .

FIG. 3A is a perspective view showing the electronic components removed from the upper case in FIG. 2 , and FIG. 3B is a perspective view showing the electronic components removed from the upper case.

FIG. 4 is a front view of the upper housing in this embodiment.

FIG. 5A is an enlarged view of part a surrounded by a single dotted line in FIG. 4 , FIG. 5B is an enlarged view of part b surrounded by a single dotted line in FIG. 4 , and FIG. 5C is an enlarged view of part b surrounded by a single dotted line in FIG. 4 Magnified view of part c enclosed by underline.

6A is an exploded perspective view of main parts showing a main circuit board and a back panel on which the main circuit board is mounted, and FIG. 6B is an exploded perspective view of main parts showing a speaker and a back panel on which the speaker is mounted.

7A is a schematic side view of the upper case in the present embodiment as viewed from the direction VII in FIG. 5C , and FIG. 7B is a schematic view showing a state in which the lower case is joined to the upper case shown in FIG. 7A Side view.

8 is a rear view of the electronic keyboard musical instrument according to the present embodiment, in which a part in the left-right direction is cut away to show the internal structure.

FIG. 9 is an enlarged perspective view of the main part of the rear side structure of the electronic keyboard instrument shown in FIG. 8 .

FIG. 10 is a plan view of main parts showing the overlapping of the second substrate and the third substrate in this embodiment.

Detailed ways

One embodiment of the electronic keyboard musical instrument of the present invention will be described with reference to FIGS. 1 to 10 . In this embodiment, the case where the electronic keyboard instrument is an electronic piano, a keyboard, or the like will be described as an example.

In addition, in the embodiments described below, various technically preferable limitations are added in order to implement the present invention. However, the scope of the present invention is not limited to the following embodiments and illustrated examples.

FIG. 1 is a perspective view of the electronic keyboard musical instrument according to this embodiment, and FIG. 2 is an exploded perspective view of the electronic keyboard musical instrument shown in FIG. 1 . In addition, in this embodiment, up and down, left and right, and front and back refer to the directions shown in FIGS. 1 and 2 .

As shown in FIGS. 1 and 2 , the electronic keyboard musical instrument 1 of this embodiment includes: a keyboard unit 2 provided with a plurality of keys 21 ; a lower case 3 in which the keyboard unit 2 is disposed; and an upper case 5 having The space for accommodating the keyboard unit 2 is arranged on the lower housing 3 .

The keyboard unit 2 has a plurality of keys 21 composed of white keys and black keys.

The keys 21 are attached to the key chassis 22 and are arranged in parallel in the longitudinal direction of the electronic keyboard musical instrument 1 (the left-right direction shown in FIGS. 1 and 2 ). The rear end portion of each key 21 is supported by a support portion (not shown), and can rotate or swing in the up and down direction when the key is struck.

In this embodiment, hammer members (not shown) are provided on each of the plurality of keys 21 . When a key is struck, an operating load is applied to the key 21 by the rotation of the hammer member, thereby reproducing a key touch feeling like that of an acoustic piano. In addition, the keyboard unit 2 is not limited to a structure having a hammer member.

As will be described later, the lower case 3 and the upper case 5 are fitted into each other's fitting portions Su and Sb (refer to FIGS. 2 and 7B ), and are integrated by screw tightening, etc., thus forming an electronic keyboard. The musical instrument case 30 is the outer part of the musical instrument 1 .

In this embodiment, the lower case 3 and the upper case 5 are made of various resins such as polystyrene (PS) or ABS resin (acrylonitrile-butadiene-styrene copolymerized resin). form. The method of forming the lower housing 3 and the upper housing 5 is not particularly limited. For example, they may be formed by integral molding using a mold.

In this way, by forming the lower case 3 and the upper case 5 integrally, the musical instrument case 30 can be easily manufactured, and the joints between the components are except for the joint portion of the lower case 3 and the upper case 5 (the fitting described later). The joints Su and Sb (refer to Figure 6B) will not appear on the surface, and a beautiful appearance can be achieved.

The lower case 3 is configured in a substantially flat plate shape, and the keyboard unit 2 is arranged on the upper surface.

The lower case 3 is a second case fitted to the lower side of the upper case 5 .

As shown in FIG. 2 , the outer peripheral edge of the lower housing 3 becomes a fitting portion Sb that is fitted with the upper housing 5 . In this embodiment, an outward flange is formed on the outer periphery of the lower housing 3, and this flange portion serves as the fitting portion Sb. In addition, the shape and arrangement of the fitting portion Sb are not limited to the illustrated example.

The fitting portion Sb is provided with a plurality of bosses 31 along the outer periphery of the lower case 3 . The bosses 31 protrude upward and have holes penetrating the inside and outside of the lower case 3 . In addition, a plurality of threaded holes 32 penetrating the inside and outside of the lower housing 3 are formed in the front edge portion of the lower housing 3 in the fitting portion Sb. In addition, the installation positions and numbers of the protruding portions 31 and the threaded holes 32 are not particularly limited and are not limited to the illustrated example.

In the present embodiment, the lower surface side (back surface side, joint side with the lower housing 3 ) of the upper housing 5 serves as a fitting portion Su that is fitted with the lower housing 3 as will be described later. The fitting portion Su of the upper case 5 is provided with a threaded hole (not shown) at a position corresponding to the boss 31 and the threaded hole 32 provided in the fitting portion Sb of the lower case 5 . Furthermore, the screws 71 are inserted into the boss 31 from the lower surface side of the lower case 3 (the bottom side of the electronic keyboard musical instrument 1 ), and the screws 72 are inserted from the lower surface side of the lower case 3 (the bottom side of the electronic keyboard musical instrument 1 ). The screws 71 and 72 are screwed into the threaded holes 32 and screwed into the threaded holes of the fitting portion Su on the upper case 5 side. The lower case 3 and the upper case 5 are screwed and fixed by these screws 71 and 72 .

In addition, a threaded hole 33 penetrating the inside and outside of the lower case 3 is formed in the portion of the lower case 3 where the keyboard unit 2 is arranged. A threaded hole (not shown) is formed on the keyboard unit 2 at a position corresponding to the threaded hole 33 . The screw 73 is inserted into the threaded hole 33 from at least one of the upper and lower sides and engages with the thread on the keyboard unit 2 side. The holes are screwed together, whereby the keyboard unit 2 is screwed and fixed to the lower housing 3 . In addition, the position and number of the threaded holes 33 are not particularly limited and are not limited to the illustrated example.

In addition, a plurality of reinforcing ribs 35 are formed on the upper surface of the lower housing 3 to increase the rigidity of the lower housing 3 .

The upper case 5 is a first case integrally formed into a substantially frame shape and arranged above the lower case 3 .

FIG. 3A is a perspective view showing the upper case alone. In addition, FIG. 3B is a perspective view showing various electronic components mounted on the upper case 5 .

The upper case 5 accommodates the keyboard unit 2 and, as shown in FIGS. 2 and 3A , has a back panel 51 as a first plate-shaped portion located on the rear side of the keyboard unit 2 and a third plate-shaped portion located on the front side of the keyboard unit 2 . The front panel 52 of the two plate-shaped parts.

The back panel 51 constitutes the rear surface of the electronic keyboard musical instrument 1 , the front panel 52 constitutes the front surface of the electronic keyboard musical instrument 1 , and the back panel 51 and the front panel 52 face each other. In this embodiment, the opposing direction of the back panel 51 and the front panel 52 is the depth direction of the musical instrument body (the front-rear direction in FIGS. 1 and 2 ).

In addition, the front panel 52 is arranged on the front side of the keys 21 of the keyboard unit 2 when the upper case 5 is mounted on the upper part of the lower case 3, and functions as a key stop in the piano.

In addition, both side portions of the upper housing 5 serve as side portions 53 .

Furthermore, an upper panel 54 is provided on the upper side of the upper case 5 and extends from the upper end of the back panel 51 toward the front of the musical instrument.

The upper panel 54 covers the upper surface of the rear side of the keyboard unit 2 arranged above the lower case 3 in the assembled state.

In addition, the upper case 5 as the first case has a first opening 56 for exposing the plurality of keys 21 and a fitting portion Su for fitting the lower case 3 as the second case. The lower surface side of the upper housing 5 in which the fitting portion Su is provided becomes the second opening 57 .

The front panel 52 is provided vertically from the front end side of the keyboard unit 2 in the first opening 56 . In addition, the lower portion of the front panel 52 constitutes a part of the fitting portion Su, and as described above, a threaded hole (not shown) is formed at a position corresponding to the threaded hole 32 of the fitting portion Sb of the lower case 3 .

In the present embodiment, an electronic component 6 (first electronic component) equipped with a CPU for control, a musical sound signal generation unit (sound source), and the like is provided at substantially the center portion in the left-right direction of the inner surface of the back panel 51 . Refer to the first substrate 63 (referred to as the main circuit substrate 63a) of FIG. 3B).

In addition, speakers 64 of the electronic component 6 (see FIG. 3B ) are arranged as sound emitting portions facing both ends of the inner surface of the back panel 51 in the left-right direction. A speaker sound hole 513 is formed on the back panel 51 at a position corresponding to the speaker 64 (see FIG. 3A ). When a player performs a keystroke operation on each key 21 of the keyboard unit 2 , the musical sound corresponding to the keystroke operation is emitted from the back panel 51 . The speaker 64 outputs sound to the outside of the musical instrument case 30 through the speaker sound hole 513 .

Each speaker 64 is electrically connected to the main circuit board 63a via a cable 65.

As shown in FIG. 2 etc., in this embodiment, the main circuit board 63a and the speaker 64 are arrange|positioned in an upright state. Therefore, space can be saved in the depth direction of the electronic keyboard musical instrument 1 (the front-rear direction in FIGS. 1 and 2 ), and the electronic keyboard musical instrument 1 can be miniaturized.

As shown in FIG. 3A , a plurality of protruding portions 511 serving as component fixing portions are spaced apart in the up and down direction at a substantially central portion in the left-right direction of the back panel 51 and corresponding to the position where the main circuit board 63 a is disposed. .

In addition, a plurality of protruding portions 512 serving as component fixing portions are spaced apart in the up and down direction at portions corresponding to the positions where the pair of left and right speakers 64 are arranged at both left and right end portions of the back panel 51 .

In the present embodiment, the bosses 511 and 512 as component fixing parts are formed to protrude toward the front of the instrument perpendicularly to the surface direction of the back plate 51, and have threaded holes (the bosses 511) formed inside. The threaded hole 511a in the protruding part 512 and the threaded hole 512a) in the protruding part 512 are threaded to tighten the fixing part. In this embodiment, the screw 67 is inserted into the threaded hole 511a in the boss part 511, and the screw 68 is inserted into the threaded hole 512a of the boss part 512. Depending on the protruding directions of the boss 511 (and its threaded hole 511a) and the boss 512 (and its threaded hole 512a), the insertion direction of each screw 67, 68 during screw tightening is from the front to the rear of the instrument. Tightening direction D (see Figure 6A and Figure 6B).

Here, the structure of the upper case 5, the lower case 3, and the electronic component 6 mounted on the upper case 5 in this embodiment will be described in detail with reference to FIGS. 4 to 7A and 7B.

4 is a front view of the upper case of this embodiment, and FIGS. 5A to 5C are enlarged views of the main parts of parts a, b, and c surrounded by a single-dot chain line in FIG. 4 .

As shown in FIG. 1 etc., in this embodiment, the width of the front panel 52 of the upper case 5 in the vertical direction is smaller than that of the back panel 51 so that the upper case 5 faces from the back panel 51 toward the front panel in side view. 52 becomes thinner.

That is, the width of the back panel 51 in the up-down direction (the short width direction of the back panel 51 ) is formed to be the same as or wider than the width in the up-down direction of the keyboard unit 2 , and the back panel 51 covers the entire rear end portion of the keyboard unit 2 . The width (width W1 in FIGS. 5A and 5B , etc.) of the panel 52 in the up-down direction (short width direction of the front panel 52 ) is formed to cover the front lower portion of the keys 21 of the keyboard unit 2 .

As described above, since the width W1 in the up-down direction (short-width direction) of the front panel 52 is formed shorter than the width W1 in the up-down direction (short-width direction) of the back panel 51, as shown in FIGS. 4 and 5A to 5C, When the front panel 52 and the back panel 51 are viewed from the front of the instrument body, there are portions above and below the back panel 51 that do not overlap the front panel 52 in the opposing direction.

The protruding portion 511 and the protruding portion 512 in this embodiment are provided at the following positions: in the back panel 51 , the back panel 51 as the first plate-shaped portion and the front panel 52 as the second plate-shaped portion are viewed from the opposite direction. The position does not coincide with the front panel 52.

Specifically, the protruding portion 511 and the protruding portion 512 are arranged at intervals longer than the vertical width W1 of the front panel 52 (ie, the length in the short width direction) from the short width direction (ie, the up and down direction of the electronic keyboard musical instrument 1 ). direction) sandwiching the front panel 52.

Accordingly, when the electronic component 6 is assembled, the upper housing 5 is configured to be linearly accessible to the component fixing portion from the outside.

As shown in FIG. 3B , the main circuit board 63 a has a threaded hole 631 serving as a through hole corresponding to the protruding portion 511 . The screw 67 is inserted through the threaded hole 631 and connected to the protruding portion of the back panel 51 . The threaded holes 511a of 511 are screwed together, so that the main circuit board 63a is screwed and fixed to the back panel 51 using the screws 67 (see FIG. 4 and FIG. 5B ).

In addition, the speaker 64 is formed with a threaded hole 641 as a through hole corresponding to the boss 512. The screw 68 is inserted through the threaded hole 641 and screwed into the threaded hole 512a of the boss 512 of the back panel 51. Then, the speaker 64 is screwed and fixed to the back panel 51 using the screws 68 (refer to FIG. 4, FIG. 5A, and FIG. 5C).

In addition, the installation positions and numbers of the protruding portions 511 and 512 are not particularly limited and are not limited to the illustrated example.

FIG. 6A is an exploded perspective view of main parts showing a main circuit board and a back panel on which the main circuit board is mounted. FIG. 6B is an exploded perspective view of main parts showing a speaker and a back panel on which the speaker is mounted. In addition, in FIGS. 6A and 6B , the thread tightening direction D is represented by a chain line.

In addition, in this embodiment, the thread tightening directions in the plurality of component fixing portions (the boss portion 511 and the boss portion 512) and the respective thread holes (the thread hole 511a and the thread hole 512a) are the same direction (thread tightening direction). Tight direction D).

In this embodiment, the front panel 52 of the upper case 5 and the plurality of component fixing parts (the bosses 511 and 512 ) are provided in a positional relationship such that the front panel 52 is not located in the plurality of threaded holes 511 a and 512 a Each thread is on the extension line of tightening direction D.

Specifically, it has the following structure.

As shown in FIG. 6A , among the through holes 631 of the main circuit board 63 a and the corresponding protruding portions 511 (threaded holes 511 a of the protruding portion 511 ), the through holes 631 and the protruding portions are arranged on the upper side of the back panel 51 511 (threaded hole 511a), the through hole 631 and the protruding portion 511 (threaded hole 511a) disposed on the lower side of the back panel 51 are arranged at a first interval W2 longer than the vertical width W1 of the front panel 52.

That is, during screw tightening, the through hole 631 and the protruding portion 511 (threaded hole 511a) corresponding to the through hole 631 are linearly arranged along the screw tightening direction D, and in contrast, the through hole 631 and the protruding portion 511 (threaded hole 511a) corresponding to the through hole 631 are inserted along the screw tightening direction D. Pass screw 67.

Therefore, as shown in FIG. 6A , the centers of the screws 67 , the through holes 631 , and the bosses 511 (threaded holes 511 a ) are linearly arranged along the thread tightening direction D, and are arranged in the through holes 631 and 631 on the upper side of the back panel 51 . The protruding portion 511 (threaded hole 511a) and the screws 67 inserted therein, and the through-hole 631 disposed on the lower side of the back panel 51, the protruding portion 511 (threaded hole 511a), and the screws 67 inserted therein are each separate from each other. They are separated in the up-down direction with a first interval W2.

In addition, as shown in FIG. 6B , among the through-hole 641 and the corresponding protruding portion 512 (threaded hole 512 a of the protruding portion 512 ) of the speaker 64 , the through-hole 641 and the protruding portion are arranged on the upper side of the back panel 51 512 (threaded hole 512a), the through hole 641 and the protruding portion 512 (threaded hole 512a) disposed on the lower side of the back panel 51 are arranged at a first interval W2 longer than the vertical width W1 of the front panel 52.

That is, when screwing, the through hole 641 and the corresponding boss 512 (threaded hole 512a) are linearly arranged along the screwing direction D. On the other hand, the screw 68 is inserted along the screwing direction D. .

Therefore, as shown in FIG. 6B , the centers of the screws 68 , the through holes 641 , and the bosses 512 (threaded holes 512 a ) are linearly arranged along the thread tightening direction D, and are arranged in the through holes 641 and 641 on the upper side of the back panel 51 . The protruding portion 512 (threaded hole 512a) and the screw 68 inserted therein are the same as the through-hole 641 disposed on the lower side of the back panel 51, the protruding portion 512 (threaded hole 512a), and the screw 68 inserted therein. They are spaced apart from each other by a first interval W2 and are arranged separately in the up-down direction.

Next, the relationship between the back panel 51 and the front panel 52 of the upper housing 5 will be described in detail with reference to FIGS. 7A and 7B .

FIG. 7A is a side view of the upper case, and FIG. 7B is a side view showing a state in which the lower case is fitted to the upper case.

In this embodiment, as shown in FIG. 7B , the upper surface 30 a of the musical instrument case and the lower surface 30 b of the musical instrument case are substantially parallel in a state where the upper case 5 and the lower case 3 are fitted. The upper surface 30 a is formed by the upper case. The lower surface 30 b is composed of the upper surface of the upper panel 54 of the body 5 and the side portion 53 of the body 5 .

In addition, as shown in FIGS. 7A and 7B , the back panel 51 and the front panel 52 of the upper housing 5 are substantially perpendicular to the upper surface 30 a of the musical instrument housing 30 (that is, the back panel 51 and the front panel 52 are formed relative to the upper surface 30 a. angles are approximately right angles).

Furthermore, the back panel 51 and the front panel 52 are provided substantially in parallel.

In addition, as shown in FIG. 7B , a perpendicular line is set to the fitting surface Sf composed of the fitting portion Su of the upper case 5 (the lower surface of the upper case 5 where the second opening 57 is provided). In the case of P1, the back panel 51 is provided to be inclined at an angle θ toward the front side of the musical instrument with respect to the vertical line P1. In addition, the size of the angle θ is not particularly limited. In addition, the back panel 51 only needs to be inclined with respect to the vertical line P1, and is not limited to the case of being inclined toward the front side of the musical instrument.

Furthermore, in the present embodiment, among the fitting portions Sb of the lower housing 3 as the second housing that are fitted with the upper housing 5 as the first housing, the front fitting portion Sb is located closer than the first housing. The lower case 3 is configured such that the fitting portion Sb on the rear side is in a high position. Therefore, as described above, when the front panel 52 and the back panel 51 are viewed from the front of the instrument body, a portion does not overlap the front panel 52 in the opposing direction in the lower portion of the back panel 51 .

In addition, in this embodiment, as shown in FIG. 7A , the thread tightening direction D in each of the threaded holes (threaded hole 511a and threaded hole 512a) of the plurality of component fixing parts (protruding parts 511 and 512) is determined. It is a direction substantially orthogonal to the back panel 51 .

In addition, the back panel 51 is provided with a connector terminal 8 that is a musical instrument digital interface (musical instrument digital interface) for transmitting and receiving data between various sockets and external devices so as to be exposed to the outside of the musical instrument case 30 . MIDI) terminals, etc. These various connector terminals 8 are mounted on the substrate 63 provided inside the musical instrument case 30 and are electrically connected thereto.

In this embodiment, as shown in FIG. 3B , the third substrate 63 (referred to as a connector substrate 63 c ) as the electronic component 6 (a second electronic component as a circuit board, see FIG. 3B ) is connected via the flat cable 66 It is electrically connected to the main circuit board 63a, and the connector terminal 8 is connected to the connector board 63c via the main circuit board 63a.

In addition, as shown in FIGS. 1 and 2 , a substantially central portion in the left-right direction of the upper panel 54 serves as a console portion 60 , and this console portion 60 is provided with a switch portion 61 and a display so as to be exposed on the upper surface of the upper case 5 Department 62.

The switch unit 61 provided on the upper panel 54 is composed of various switches for performing operations required for the keyboard instrument, such as a power switch, a volume switch, a tone switch, and a function switch. In addition, the display unit 62 is configured to display various information required for the keyboard instrument.

The switch portion 61 is arranged around the display portion 62 .

As shown in FIG. 3A , a plurality of mounting portions 541 a and a display arrangement portion 542 are formed as through holes in the upper panel 54 .

The second substrate 63 (referred to as the console substrate 63b) as the electronic component 6 (first electronic component, see FIG. 3B ) is mounted on the lower surface (inner surface) of the upper panel 54 .

As shown in FIG. 3B , the switch member 61 a is mounted on the console board 63 b of this embodiment at a position corresponding to each mounting portion 541 a , and the display unit 62 a is mounted on a position corresponding to the display arrangement portion 542 . The display unit 62a has a flat display panel, such as a liquid crystal display panel or an EL (electroluminescence) display panel.

Furthermore, by mounting the console substrate 63b with the switch member 61a and the display unit 62a attached at a predetermined position on the upper panel 54, a part of the switch member 61a is exposed from each mounting portion 541a, and the display panel portion of the display unit 62a is exposed from the display unit 62a. The arrangement part 542 is exposed.

In addition, a mounting portion 541b serving as a through hole is formed on the upper surface of the side portion 53 (in the present embodiment, the left side portion 53 in FIG. 1 and the like). The rotary operation member 61b is attached to the attachment part 541b, and the rotary switch part 61 is comprised.

The rotary switch portion 61 provided on the upper surface of the side portion 53 is operated, for example, during keystroke operation of each key 21 of the keyboard unit 2 to give a pitch bend to the musical sound during the performance. Effects and modulation effects, etc.

As shown in FIG. 3B , the rotary switch unit 61 is electrically connected to the main circuit board 63 a via a cable 65 .

FIG. 8 is a rear view of the electronic keyboard instrument, which is a diagram showing the internal structure of the electronic keyboard instrument by cutting away the substantially central portion in the left-right direction (the portion where the console portion 60 is provided and its peripheral portion). In addition, FIG. 9 is an enlarged perspective view of the main part of the structure of the back side of the electronic keyboard musical instrument shown in FIG. 8 in a cutaway manner.

As shown in FIGS. 8 and 9 , in this embodiment, the console board 63 b as the electronic component 6 (first electronic component) is arranged substantially orthogonally to the main circuit board 63 a provided on the back panel 51 . In addition, a connector board 63c as the electronic component 6 (second electronic component) is arranged to overlap the console board 63b.

Specifically, as described above, the console board 63b on which the switch member 61a and the display unit 62a are mounted is mounted on the lower surface (inner side) of the upper panel 54, and the connector board 63c is superimposed on the lower surface side of the console board 63b. .

FIG. 10 is a plan view of a portion of the upper panel where the substrates (that is, the console substrate and the connector substrate) are provided, as viewed from the lower surface (inner surface) side.

As shown in FIG. 10 , the connector board 63 c is provided on the lower surface side of the console board 63 b so as to overlap a part of the console board 63 b. The controller substrate 63c) is formed on a portion corresponding to the component fixing portion (the threaded hole 69 in the present embodiment) of the substrate 63 (the console substrate 63b in this embodiment) arranged on the back side in the overlapping direction. There is a penetration part.

In the present embodiment, the insertion portion is a notch portion 632 formed so as to avoid the threaded hole 69 of the screw for fixing the substrate 63 arranged on the back side in the overlapping direction.

In addition, the insertion part is not limited to the cutout part and may be a hole part. In addition, in the present embodiment, the cutout portion 632 serving as the insertion portion is suitably provided at a position that avoids not only the threaded hole 69 but also a position that avoids components such as wiring patterns. Components such as line patterns are also provided on the lower surface side of the substrate 63 (console substrate 63b) arranged on the back side in the overlapping direction. Thereby, the console board 63b and the connector board 63c can be overlapped substantially in parallel without leaving an unnecessary gap without damaging the wiring pattern etc. provided on the console board 63b.

Next, the operation of the electronic keyboard musical instrument 1 of this embodiment (the method of manufacturing the electronic keyboard musical instrument 1) will be described.

When assembling the electronic keyboard musical instrument 1 , first, the lower case 3 and the upper case 5 are integrally molded with resin or the like using a mold.

At this time, the protrusions 31 formed on the lower housing 3 are erected in the same direction.

Furthermore, a plurality of keys 21 and hammer members corresponding to each key 21 are assembled to the key chassis 22 , thereby constituting the keyboard unit 2 .

The first substrate 63 (main circuit substrate 63a) is mounted substantially in the center of the inner surface of the back panel 51 of the upper case 5 (that is, the surface facing the front of the musical instrument). At this time, the main circuit board 63a is positioned so that the threaded hole 631 of the main circuit board 63a is aligned with the position of the boss 511 provided with the screw fixing portion as the component fixing portion, along the screw tightening direction. D inserts the screw 67 through the threaded hole 631 and screws it into the threaded hole 511a of the protruding portion 511 of the back panel 51, thereby screwing the main circuit board 63a to the back panel 51 with the screw 67.

In addition, speakers 64 are installed on the inner side of the back panel 51 at both left and right ends. At this time, the speaker 64 is positioned so that the threaded hole 641 of the speaker 64 is aligned with the position where the protruding portion 512 serving as a screw fixing portion as a component fixing portion is provided, and the screw 68 is tightened along the screw tightening direction D. The speaker 64 is inserted through the threaded hole 641 and screwed into the threaded hole 512 a of the protruding portion 512 of the back panel 51 , whereby the speaker 64 is screwed and fixed to the back panel 51 using the screws 68 .

In this embodiment, these screw tightening and fixing are performed together using an automatic screw tightening machine (not shown). An automatic thread tightening machine is equipped with a screwdriver (screwdriver bit) that engages with a screw, for example, performs thread tightening through automatic control, and employs a uniaxial structure that linearly approaches an object.

That is, for example, after arranging the main circuit board 63a and the speaker 64 at predetermined positions on the back panel 51, an automatic screw tightening machine is operated, and the main circuit is tightened and fixed together using a screwdriver of the automatic screw tightening machine. The screws 67 of the base plate 63a and the screws 68 of the speaker 64 are fixed.

As described above, the protruding portion 511 and the protruding portion 512 serving as screw fixing portions in this embodiment sandwich the front panel 52 at a position that avoids the front panel 52 and does not overlap with the front panel 52 in the opposing direction. Distributed configuration up and down.

Therefore, for example, even if the automatic screw tightening machine has a single-axis structure, the screw fixing portion (that is, the boss portion 511 and the boss portion 512) as the component fixing portion is fixed from the opposite direction of the back panel 51 and the front panel 52. Even in the case of linear approach, the screw 67 and the screw 68 can be appropriately tightened without interfering with the front panel 52 and the like.

In addition, thread tightening is not limited to an automatic thread tightening machine, and does not exclude the case of manually tightening the thread using a screwdriver.

Then, each speaker 64 is electrically connected to the main circuit board 63 a via the cable 65 .

Furthermore, the rotary operating member 61 b is attached to the mounting portion 541 b of the side portion 53 (the left side portion 53 in the present embodiment) to configure the rotary switch portion 61 . The rotation operation member 61b is electrically connected to the main circuit board 63a via a cable 65.

In addition, the switch member 61a and the display unit 62a are mounted on the second substrate 63 (the console substrate 63b). In this installed state, the console substrate 63b is mounted on the inner side (ie, the lower side) of the upper panel 54 of the upper housing 5. roughly central part. Thereby, one end side of the switch member 61a is exposed from the attachment part 541a, and the display unit 62a is arrange|positioned in the display arrangement part 542 so that it can be visually recognized from the outside. Thus, the console portion 60 is formed on the exterior surface of the upper panel 54 .

When the console board 63b is installed, the console board 63b is positioned so that the threaded holes of the console board 63b are aligned with the positions where the screw fixing portions 545 serving as component fixing portions are provided, and the screws 69 are inserted through the threaded holes. By inserting and screwing into the screw fixing portion 545 of the upper panel 54 , the console base plate 63 b is screwed and fixed to the upper panel 54 using the screws 69 .

In addition, in this embodiment, the connector board 63c to which the connector terminals 8 and the like provided on the back panel 51 and the like are electrically connected is provided as the third board 63 so as to overlap the console board 63b as the second board 63. .

The connector board 63c and the console board 63b are jointly fastened with screws 69 while being overlapped with the console board 63b.

In the present embodiment, in the portion corresponding to the screw fixing portion 545 where only the console board 63b is intended to be fixed, and the portion corresponding to the portion where the connector board 63c is not intended to overlap (for example, a portion where a wiring pattern is provided), A cutout portion 632 is provided as an insertion portion to appropriately avoid the screw fixing portion 545 and the like.

In this embodiment, the console board 63b and the connector board 63c are also screwed and fixed together using an automatic screw tightening machine.

Therefore, even if there are a large number of screw fixing locations, the console board 63b and the connector board 63c can be quickly fixed.

In addition, the connector board 63c is electrically connected to the main circuit board 63a using the flat cable 66.

When the board 63 as the electronic component 6 (that is, in this embodiment, the main circuit board 63a, the console board 63b, the connector board 63c) and the speaker 64 are mounted on the upper housing 5, the keyboard unit 2 is arranged in the lower part Above the housing 3, an upper housing 5 is arranged from above.

Thereby, the lower part of the front side of the keyboard unit 2 is covered by the front panel 52 of the upper case 5 . Moreover, the rear side of the keyboard unit 2 is covered by the back panel 51 of the upper case 5 , and the upper surface of the rear side of the keyboard unit 2 is covered by the upper panel 54 of the upper case 5 .

In this state, the entire instrument is laid down with the back panel 51 facing down, and the lower case 3 is fixed using an automatic screw tightening machine from the bottom side of the electronic keyboard instrument 1 (that is, the back side of the lower case 3). The screws 71 and 72 of the upper case 5 and the screws 73 fixing the lower case 3 and the keyboard unit 2 are screwed together to fix it.

Thus, the electronic keyboard musical instrument 1 is completed.

As described above, according to the present embodiment, the upper housing 5 constituting the musical instrument housing 30 is formed in a frame shape.

Therefore, no joint portion between members occurs at the front portion of the electronic keyboard musical instrument 1, which is equivalent to a key stop in a piano, thereby providing an excellent appearance of the instrument.

In addition, the musical instrument case 30 is composed of two components, the lower case 3 and the upper case 5. In particular, the upper case 5 that forms the storage space of the keyboard unit 2 is a frame-shaped body connected in a row. The upper case 5 composed of a plurality of members has higher rigidity than the case where the electronic keyboard musical instrument 1 includes the keyboard unit 2 having a mallet member, for example, as in the present embodiment, and can sufficiently bear the weight thereof.

In addition, the upper case 5 of the electronic keyboard musical instrument 1 is configured such that, when the substrate 63, the speaker 64, and the like as electronic components are assembled, it is fixed relative to the screw fixing portion (in the present embodiment, the boss portion 511, 512, etc.) can be approached linearly from the outside.

Specifically, the electronic component 6 (first electronic component) is provided with a plurality of threaded holes 631 and 641 at first intervals W2 that are longer than the vertical width W1 of the front panel 52 , and the back panel 51 On the top of the body, a plurality of component fixing portions (protruding portions 511, 512) are provided at a first interval W2 in the up and down direction. The component fixing portions have threaded holes 511a, 512a, and the threaded holes 511a, 512a are used for screwing 67 and 68 pass through the threaded holes 631 and 641 to fix the electronic component 6 (first electronic component).

Therefore, even an automatic thread tightening machine with a single-axis structure that can only approach the object linearly can approach the screw fixing portion (that is, the boss portions 511 and 512) and automatically tighten the threads together. In addition, when screw tightening is performed manually, the screw driver shaft and the like are not caught by the front panel 52 and the like, and the screw tightening operation can be performed smoothly.

Thereby, the electronic keyboard musical instrument 1 can be assembled simply and quickly.

In addition, in this embodiment, the upper housing 5 as the first housing is configured such that the lower portion of the front panel 52 is located lower than the component fixing portions of the plurality of component fixing portions (the boss portions 511 and 512 ). The threaded holes 511a and 512a (the bosses 511 and 512) are located above the extension line in the threading direction D, and the upper part of the front panel 52 is located in the plurality of component fixing parts (the bosses 511 and 512). The lower position on the extension line of the thread tightening direction D of the threaded holes 511a and 512a of the upper component fixing portion (the boss portions 511 and 512). Thereby, the screw tightening direction D of the threaded holes 511a and 512a of the component fixing part (the bosses 511 and 512) located on the lower side is the same as the threaded hole 511a of the component fixing part (the bosses 511 and 512) located on the upper side. , 512a in the up-down direction (first interval W2) in the threading direction D is longer (larger) than the up-down direction width W2 of the front panel 52.

Therefore, when the electronic component 6 is mounted on the back panel 51, it is possible to avoid the front panel 52 and linearly approach the threaded holes 511a, 512a of the protrusions 511, 512, even with a single-axis structure that can only linearly approach the object. The automatic thread tightening machine can also perform thread tightening automatically and easily. In addition, when screw tightening is performed manually, the screw driver shaft and the like are not caught by the front panel 52 and the like, and the screw tightening operation can be performed smoothly.

Thereby, the electronic keyboard musical instrument 1 can be assembled simply and quickly.

In addition, in the present embodiment, when a perpendicular line is set with respect to the fitting surface Sf formed by the fitting portion Su, the back panel 51 is provided inclined with respect to the perpendicular line.

This makes it easy to linearly access the threaded holes 511a and 512a provided in the boss portions 511 and 512 of the back panel 51, so that threading can be performed easily.

In addition, in this embodiment, the lower housing 3 is configured such that the front side of the fitting portion Sb of the lower housing 3 as the second housing is fitted with the upper housing 5 as the first housing. The fitting portion Sb of is located at a higher position than the fitting portion Sb on the rear side.

Thereby, the front panel 52 and the back panel 51 do not overlap at all, and the threaded holes 511a and 512a provided in the protrusions 511 and 512 of the back panel 51 can be easily accessed linearly and screwed easily.

In addition, in this embodiment, the screw tightening direction D in the threaded holes 511a and 512a of the plurality of component fixing parts (the bosses 511 and 512) is the same direction.

Therefore, screw tightening can be performed simultaneously from the same angle.

In addition, in the present embodiment, the thread tightening direction D in the threaded holes 511 a and 512 a of the plurality of component fixing parts (the bosses 511 and 512 ) is a direction orthogonal to the back panel 51 .

Therefore, the threaded holes 511a and 512a provided in the boss portions 511 and 512 of the back plate 51 can be accessed from the front side of the musical instrument, and screwing can be performed easily.

In addition, the upper case 5 of this embodiment has a back plate 51 as a first plate-shaped portion and a front plate 52 as a second plate-like portion that face each other. On the back plate 51, components for fixing the electronic component 6 are fixed. portions (in this embodiment, screw fixing portions such as the protruding portions 511 and 512 ) are provided at positions that do not overlap the front panel 52 when the back panel 51 and the front panel 52 are viewed from the opposite direction.

Therefore, even an automatic thread tightening machine with a single-axis structure that can only approach the object linearly can approach the screw fixing portion (that is, the boss portions 511 and 512) and automatically tighten the threads together. In addition, when tightening the thread manually, the thread tightening operation can be easily performed in a short time.

In addition, in this embodiment, the opposing direction is the depth direction of the musical instrument body.

Therefore, for example, as shown in FIG. 4 and FIGS. 5A to 5C , when the upper case 5 is viewed from the front side (ie, the front), the screw fixing portions (ie, the boss portions 511 and 512 ) are not blocked by the front panel 52 Occlusion, being able to see through its location. Furthermore, by linearly inserting the screwdriver bit of the automatic screw tightening machine into the upper case 5 from the front side, the electronic component 6 can be easily screwed using the automatic screw tightening machine.

In addition, in the present embodiment, the screw fixing portions (that is, the protruding portions 511, 512, etc.) as the component fixing portions are in a positional relationship sandwiching the front panel 52 as the second plate-shaped portion in the short width direction, and A plurality of back plates 51 serving as first plate-shaped portions are provided at intervals larger than the width of the front plate 52 in the short width direction.

Therefore, even when the upper case 5 is configured as a frame-shaped body connected in a row without a joint in the circumferential direction as in the present embodiment, it can be provided in a linear manner close to the back panel 51 without being obstructed by the front panel 52 The screw fixing parts such as the protrusions 511 and 512 can be automatically tightened together even if an automatic thread tightening machine with a single-axis structure is used.

In addition, in this embodiment, at least a part of the electronic components 6 (in this embodiment, the console board 63b as the second board 63 and the connector board 63c as the third board 63) are overlapped and arranged in plurality. , in the electronic component 6 (in this embodiment, the connection as the third substrate 63 ) which is disposed on the near side in the overlapping direction of the electronic components 6 (in this embodiment, the up-and-down direction in FIGS. 1 and 2 ). On the console substrate 63c), among the electronic components 6 (in the present embodiment, the console substrate 63b as the second substrate 63) arranged on the back side in the overlapping direction, the screw fixing portion 545 as the component fixing portion corresponds to A cutout portion 632 serving as an insertion portion is formed in the portion.

Therefore, even when the electronic components 6 are partially overlapped, all the electronic components 6 including the electronic components 6 arranged on the back side in the overlapping direction can be properly screwed and fixed.

In addition, in this embodiment, by arranging at least part of the electronic components 6 in an overlapping manner, the electronic components 6 such as the substrate 63 can be collectively arranged in a substantially central portion of the electronic keyboard musical instrument 1 in the width direction.

The various jacks, connector terminals 8, etc. are easily accessible to the user if they are arranged in the center of the entire musical instrument. In addition, if the console unit 60 is disposed in the center of the entire musical instrument, it is easy to see and operate, and therefore is easy to use by the user. Furthermore, the jack, connector terminal 8, etc., console portion 60, etc. need to be electrically connected to the substrate 63 as the electronic component 6. However, the farther the distance from the substrate 63 and the longer the length of the connected cable 65, the easier it is to carry noise. , so it is not preferred.

In this regard, when the base plate 63 is centrally arranged in the center of the entire musical instrument as in the present embodiment, it is possible to arrange the jacks, the connector terminals 8 and the like, the console portion 60 and the like in an area that is easy for the user to use. location, and are also less susceptible to noise-bearing structures.

In addition, although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various modifications can be made without departing from the gist of the invention.

For example, in this embodiment, the protruding portion 511 and the protruding portion 512 as component fixing portions are formed to protrude forward of the instrument perpendicularly to the surface direction of the back plate 51 , and a thread with a threaded hole formed therein is exemplified. In the case of tightening the fixing portion, the protruding direction of the protruding portion 511 and the protruding portion 512 as the component fixing portion is not limited to the front of the instrument perpendicular to the surface direction of the back panel 51 .

For example, the component fixing portion may be provided at an angle such as obliquely upward, obliquely downward, or the like. In this case, the positions of the back panel 51 as the first plate-shaped portion and the front panel 52 as the second plate-shaped portion are adjusted according to the angle of the component fixing portion so that the back panel 51 is not in contact with the front panel 52 Overlapping parts.

In addition, in this embodiment, the case where the screw tightening direction D is a direction orthogonal to the back plate 51 is illustrated, but the screw tightening direction D is not limited to this.

In addition, in this embodiment, the case where the thread tightening direction D of the plurality of threaded holes 511a, 512a is the same direction is illustrated, but the component fixing portion (in this embodiment, the boss portion 511, 512, etc.) may also be used. ) varies depending on the location. In this case, the thread tightening direction D also corresponds to each direction corresponding to the angle of the component fixing portion.

In addition, when the lower housing 3 and the upper housing 5 are formed by integral molding using a mold, from the viewpoint of mold manufacturing, it is preferable that the angles of the component fixing portions are all unified in the same direction. In this case, the screw thread The tight directions D are also all in the same direction.

In addition, in this embodiment, the case where the front panel 52 and the back panel 51 are parallel is illustrated, but the front panel 52 and the back panel 51 do not need to be parallel.

In addition, in this embodiment, the case where the front panel 52 and the back panel 51 are substantially perpendicular to the upper surface 30a of the instrument case is illustrated. However, the angle between the front panel 52 and the back panel 51 with respect to the upper surface 30a of the instrument case is It is not limited to this.

In addition, in this embodiment, the case where the upper surface 30a of the musical instrument case and the lower surface 30b of the musical instrument case are substantially parallel in the state in which the upper case 5 and the lower case 3 are fitted is illustrated. However, the case of the musical instrument case 30 The external shape is not limited to this. For example, the upper surface 30a may be inclined relative to the lower surface 30b so as to become lower from the rear toward the front.

In addition, the outer shape of the musical instrument case 30 or the electronic keyboard musical instrument 1 can be appropriately changed.

In this embodiment, the electronic component 6 is illustrated as being provided with three substrates 63 (that is, the main circuit substrate 63a, the console substrate 63b, and the connector substrate 63c) and a pair of speakers 64. However, the electronic component 6 Other components may also be included.

For example, in addition to the pair of speakers 64 , a tweeter as a high-range speaker that is specialized for high-range output, a woofer as a low-range speaker that is specialized for low-range output, and the like may be provided.

In addition, the number of substrates 63 may be two or less.

In addition, it is only necessary that at least a part of the first electronic component and the second electronic component be overlapped and arranged in an overlapping manner, and a part of the speaker 64 may be overlapped. In addition, the speaker 64 may partially overlap the base plate 63 .

In addition, the structure in which the electronic components 6 are overlapped is not required, and any structure without such a structure is also included in the scope of the present invention.

In addition, in this embodiment, the component fixing part is exemplified as the boss part 511 and the boss part 512 etc. which are screw fixing parts, but the component fixation part is not limited to a boss part etc., and may be a simple one. Holes, fastening screws and other concave parts, etc.

In addition, the electronic component 6 is not limited to being fixed by screws, and may be fixed by bonding with an adhesive, welding or welding, or the like.

The present invention is not limited to each of the above-described embodiments, and various modifications can be made at the implementation stage within the scope that does not deviate from the gist of the invention. Furthermore, each of the embodiments described above includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or several constituent elements are combined in different ways, the problems described in the "Problems to be Solved by the Invention" column can be solved, and the following can be obtained. In the case of an effect described in the inventive effect column, a structure obtained by deleting or combining the constituent elements can be extracted as an invention.

For example, the following structure may be proposed as an invention. The electronic keyboard musical instrument according to this embodiment includes: a keyboard unit provided with a plurality of keys; and a first housing that accommodates the keyboard unit and has a structure located on the A front panel on the front side of the keyboard unit and a back panel located on the rear side of the keyboard unit, a first opening portion for exposing the plurality of keys is provided between the front panel and the back panel, the The back panel is provided with a component fixing portion having a threaded hole for fixing the electronic component with a screw, a position of the component fixing portion in the back panel and a position of the threaded hole of the component fixing portion. The threading direction is configured such that not the front panel but the first opening is located on an extension line of the threading direction of the threaded hole.

In addition, in this case, the structure may be further provided with: a second housing fitted to the lower side of the first housing; and a first electronic component located higher and lower than the front panel. A plurality of through holes are provided at first intervals with a long width in the direction, and the first housing has a second opening provided for fitting the second housing to the lower side. part, the back panel is provided with a plurality of component fixing parts having threaded holes spaced apart in the up and down direction at the first interval, and the threaded holes are used to fix the component fixing parts by passing screws through the through holes. In the first electronic component, the positions of the plurality of component fixing portions in the back panel and the threading directions of the threaded holes in each of the component fixing portions are set to, not the front panel but The first opening is located on an extension line in the thread tightening direction of the threaded hole of the upper component fixing portion among the plurality of component fixing portions, and is not the front panel but the second opening. The portion is located on an extension line in the thread tightening direction of the threaded hole of the lower component fixing portion among the plurality of component fixing portions.

In addition, in this embodiment, the case where electronic components are fixed with screws and the screws are tightened using an automatic screw tightening machine are explained. However, the present embodiment can also be applied to the case where electronic components are fixed using fastening members other than screws. Condition. For example, even when a fastening member without threads is inserted into a through-hole and fixed, and the direction of insertion into the through-hole is determined by approaching the member from the outside, the housing can be configured so that it is not positioned in that direction. on the extension line.

Claims (13)

1. An electronic keyboard musical instrument, which has: a keyboard unit having a plurality of keys; and The first housing is a housing that accommodates the keyboard unit, and has a front panel located on the front side of the keyboard unit and a back panel located on the rear side of the keyboard unit. Between the front panel and the back panel A first opening for exposing the plurality of keys is provided between the panels, The back panel is provided with a component fixing portion having threaded holes for fixing electronic components with screws, The position of the component fixing portion in the back panel and the threading direction of the threaded hole of the component fixing portion are configured such that the front panel is not located on an extension of the threading direction of the threaded hole. on the extension line, the first opening is located on the extension line. 2. The electronic keyboard musical instrument according to claim 1, further comprising: a second housing fitted to the lower side of the first housing; and a first electronic component having a plurality of through holes provided at first intervals longer than the vertical width of the front panel, The first housing has a second opening provided in a fitting portion for fitting the second housing on the lower side, The back panel is provided with a plurality of component fixing portions having threaded holes spaced apart in the vertical direction at the first intervals, and the threaded holes are used to fix the first component fixing portions by passing screws through the through holes. electronic components, The positions of the plurality of component fixing portions in the back panel and the thread tightening directions of the threaded holes in each of the component fixing portions are set such that the front panel is not located at the plurality of component fixing portions. The first opening is located on the extension line of the thread tightening direction of the threaded hole of the upper component fixing portion, and the front panel is not located on the plurality of component fixing portions. The second opening is located on the extension line of the thread tightening direction of the threaded hole of the component fixing portion on the lower side. 3. The electronic keyboard instrument according to claim 2, wherein, the front panel is disposed vertically from a front end side of the keyboard unit of the first opening, The lower part of the front panel constitutes a part of the fitting part, The first housing is configured as, The lower part of the front panel is located above an extension line in the threading direction of the threaded hole of the component fixing part located on the lower side among the plurality of component fixing parts, The upper portion of the front panel is located lower than an extension line in the threading direction of the threaded hole of the upper component fixing portion among the plurality of component fixing portions. 4. The electronic keyboard instrument according to claim 2, wherein, When a perpendicular line is set with respect to the fitting surface formed by the fitting part, the back panel is provided inclined with respect to the perpendicular line. 5. The electronic keyboard instrument according to claim 2, wherein, The second housing is configured such that, among the fitting portions of the second housing that are fitted to the first housing, a front fitting portion is positioned higher than a rear fitting portion. 6. The electronic keyboard instrument according to claim 2, wherein, The fitting surface of the first housing and the second housing is inclined relative to the lower surface of the second housing. 7. The electronic keyboard musical instrument according to any one of claims 1 to 6, wherein, The thread tightening directions in the threaded holes of the plurality of component fixing parts are the same direction. 8. The electronic keyboard musical instrument according to any one of claims 1 to 6, wherein, The thread tightening direction in the threaded hole of each of the plurality of component fixing parts is a direction orthogonal to the back panel. 9. The electronic keyboard musical instrument according to claim 2, wherein, The first electronic component is a speaker. 10. The electronic keyboard instrument according to claim 2, wherein, The first electronic component is a circuit board. 11. The electronic keyboard instrument according to claim 2, wherein, Also having a second electronic component as a circuit substrate, The first electronic component and the second electronic component are at least partially overlapped and arranged in an overlapping manner, On the second electronic component disposed on the front side in the overlapping direction, an insert is formed on a portion corresponding to the component fixing portion of the first electronic component disposed on the back side in the overlapping direction. Tongbu. 12. A method of manufacturing an electronic keyboard musical instrument, the electronic keyboard musical instrument being provided with: a keyboard unit having a plurality of keys; and a first housing for accommodating the keyboard unit and having the function of allowing the plurality of keys to be The exposed first opening, the front panel located on the front side of the keyboard unit, and the back panel located on the rear side of the keyboard unit, wherein, The back panel is provided with a component fixing portion having threaded holes for fixing electronic components with screws, The position of the component fixing portion in the back panel and the threading direction of the threaded hole in the component fixing portion are configured such that the front panel is not located in an extension of the threading direction of the threaded hole. on the line, the first opening is located on the extension line, When assembling the electronic keyboard instrument, The screw inserted into the threaded hole of the component fixing part is tightened by linearly approaching through the first opening from the outside of the first housing using a screw tightening machine. 13. The method of manufacturing an electronic keyboard musical instrument according to claim 12, wherein, The electronic keyboard musical instrument further includes: a second housing fitted to the lower side of the first housing; and a first electronic component provided at a first interval longer than a vertical width of the front panel. Multiple through holes, The first housing has a second opening provided in a fitting portion for fitting the second housing on the lower side, The back panel is provided with a plurality of component fixing portions having threaded holes spaced apart in the vertical direction at the first intervals, and the threaded holes are used to fix the first component fixing portions by passing screws through the through holes. electronic components, The positions of the plurality of component fixing portions in the back panel and the threading directions of the threaded holes in each of the component fixing portions are set such that the front panel is not located in any of the plurality of component fixing portions. The first opening is located on an extension of the thread tightening direction of the threaded hole of the upper component fixing portion, and the front panel is not located on one of the plurality of component fixing portions. The second opening is located on an extension line of the thread tightening direction of the threaded hole of the lower component fixing portion, A screw inserted into the threaded hole of the upper component fixing portion among the plurality of component fixing portions is passed through the first opening from the outside of the first housing with a screw tightening machine. Approach in a straight line for thread tightening, A screw inserted into the threaded hole of the lower component fixing portion among the plurality of component fixing portions is passed through the second opening from the outside of the first housing with a screw tightening machine. Approach in a straight line for thread tightening.