Keyboard

Abstract

A keyboard musical instrument is provided, which can be easily carried and can easily install a music stand without shaking. The keyboard musical instrument (10) comprises a keyboard (11) and a musical instrument case (20), wherein the musical instrument case (20) comprises: a through hole (21) which passes through from the top surface (20a) side to the bottom surface (20b) side; and a locking portion (24) which is used to lock the music stand (50) when a part of the music stand (50) is arranged in the through hole (21).

Description

Technical Field

[0001] The present invention relates to a keyboard musical instrument. Background Art

[0002] Conventionally, there is provided a keyboard musical instrument equipped with a detachable music stand. For example, Patent Document 1 discloses a keyboard musical instrument equipped with a music stand device, in which a music score panel is detachably provided on a music score receiving portion.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2009-229860 Summary of the invention

[0006] Problems to be solved by the invention

[0007] When the music stand shakes due to keystrokes, it may sometimes cause trouble to the performance. On the other hand, it is desired that the music stand can be easily attached and detached.

[0008] An object of the present invention is to provide a keyboard musical instrument that can be easily carried and to which a music stand can be easily mounted without shaking.

[0009] Means for solving problems

[0010] The keyboard musical instrument of the present invention comprises a keyboard and a musical instrument case having a through hole penetrating from the top surface side to the bottom surface side and a locking portion for locking the music stand when a part of the music stand is arranged in the through hole.

[0011] Effects of the Invention

[0012] According to the present invention, it is possible to provide a keyboard musical instrument that can be easily carried and to which a music stand can be easily mounted without looseness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a perspective view of a keyboard musical instrument and a music stand attached to the keyboard musical instrument according to an embodiment of the present invention as viewed from the front.

[0014] Figure 2 This is an exploded perspective view of a keyboard instrument and a music stand according to an embodiment of the present invention as viewed from the front.

[0015] Figure 3 This is a perspective view of the keyboard instrument according to the embodiment of the present invention as viewed from the rear.

[0016] Figure 4 This is an enlarged rear view of the grip portion of the keyboard instrument according to the embodiment of the present invention as viewed from the rear side.

[0017] Figure 5 This is an enlarged perspective view of the grip portion of the keyboard instrument according to the embodiment of the present invention as viewed from the rear.

[0018] Figure 6 The present invention is a keyboard instrument grip portion. Figure 5 VI-VI sectional view.

[0019] Figure 7 is from Figure 5 An enlarged perspective view of the grip portion of the keyboard instrument according to an embodiment of the present invention as viewed from the D1 direction (bottom side).

[0020] Figure 8 This is a perspective view of a music stand attached to a keyboard musical instrument according to an embodiment of the present invention as viewed from the front side.

[0021] Fig. 9 This is a perspective view of a music stand attached to a keyboard musical instrument according to an embodiment of the present invention as viewed from the rear side.

[0022] Fig.10 The keyboard instrument of the embodiment of the present invention is provided with a music stand, which corresponds to the center of the keyboard instrument in the left-right direction. Figure 1 XIa-XIa section cross-sectional view of FIG. 1 , (a) shows the situation before the music stand is installed, and (b) shows the situation when the insertion portion of the music stand is inserted into the through hole.

[0023] Fig.11 2 is a cross-sectional view showing a keyboard instrument according to an embodiment of the present invention with a music stand installed thereon, wherein (a) is a cross-sectional view of the keyboard instrument at the center in the left-right direction. Figure 1 XIa-XIa cross-sectional view of the keyboard instrument, (b) is a cross-sectional view of the keyboard instrument at a position offset from the center in the left-right direction. Figure 1 XIb-XIb cross-sectional view.

[0024] Fig.12 The music stand of the keyboard musical instrument according to the embodiment of the present invention is removed, and corresponds to the center of the keyboard musical instrument in the left-right direction. Figure 1 The XIa-XIa section of the cross-sectional view shows that (a) is a state in which the music stand is tilted forward, and (b) is a state in which the music stand is pulled out.

[0025] Fig.13 The keyboard instrument according to the embodiment of the present invention is provided with a music stand. Fig.11 (a) XIII-XIII cross-sectional view. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1and Figure 2 1 and 2 represent a keyboard instrument 10 and a music stand 50. The music stand 50 is detachable relative to the keyboard instrument 10, and its details will be described later. The keyboard instrument 10 is configured as an electronic piano or an electronic keyboard, and includes a keyboard 11 with 61 keys and an instrument case 20. In the following description, the front in the front-to-back direction FB of the keys of the keyboard 11 is referred to as the front side F, the back in the front-to-back direction FB of the keys is referred to as the back side B, the left when facing the keyboard 11 is referred to as the left side L, and the right when facing the keyboard 11 is referred to as the right side R. The arrangement direction LR of the keys of the keyboard 11 is the left-right direction. The instrument case 20 is a roughly long rectangular plate with the left-to-right direction as the longitudinal direction, and includes an upper case and a lower case that are divided, and stores a substrate, a battery as a power source, and the like.

[0027] The keyboard instrument 10 has an operation unit 12 on the rear upper surface of the instrument case 20, which is the rear side B of the keyboard 11, where various settings can be made. Speaker units 13a and 13b are provided on the left and right sides of the operation unit 12, respectively. The speaker units 13a and 13b have a plurality of holes formed on the upper and rear surfaces of the instrument case 20, and speakers (not shown) are provided inside the corresponding instrument cases 20. Figure 3 As shown, an input portion 14 to which various plugs can be connected is provided on the back of the instrument housing 20 .

[0028] like Figures 3 to 7 As shown, the musical instrument case 20 is provided with a gripping portion 30 at the rear side of the approximate center in the left-right direction. The gripping portion 30 includes a portion of the inner wall 22 of the through hole 21 that passes from the top surface 20a (upper side) of the musical instrument case 20 to the bottom surface 20b (lower side). In the present embodiment, the gripping portion 30 includes the inner wall 22 of the rear side B of the through hole 21. The through hole 21 is a long strip that is long in the left-right direction. The gripping portion 30 is formed into a roughly rod-like shape following the through hole 21, and the rear surface of the musical instrument case 20 including the rear surface of the gripping portion 30 is continuous and straight when viewed from above.

[0029] The keyboard musical instrument 10 has a guide portion 23 curved in a convex shape around the left and right end sides of the through hole 21 on the top surface 20a side of the musical instrument case 20. On the other hand, the grip portion 30 has a convex curved upper surface portion 30a and a lower surface portion 30b. The guide portion 23 is a curved surface continuous with the upper surface portion 30a of the grip portion 30. The curvature of the guide portion 23 is set to be smaller than the curvature of the upper surface portion 30a of the grip portion 30.

[0030] like Figure 4As shown, the through hole 21 includes rear openings 21a and 21b on the upper and lower sides, respectively, which are open to the rear surface side of the instrument case 20. Therefore, the dimension T1 of the grip 30 in the vertical direction is smaller than the dimension (thickness) T2 of the instrument case 20 adjacent to the grip 30 in the vertical direction. Thus, the grip 30 can be appropriately set to a slender thickness that is easy to hold. Moreover, through the rear opening 21b on the lower side, even when the keyboard instrument 10 is placed on a table, the hand can be inserted into the through hole 21 from the rear opening 21b and the grip 30 can be easily held.

[0031] In addition, in order to enable the user (user) to hold the grip 30 and carry the keyboard instrument 10 well, a plurality of batteries used as power sources are arranged near the center of the key arrangement direction LR in the instrument case 20 in a manner that makes the left and right balance of the keyboard instrument 10 as uniform as possible during transportation.

[0032] like Figure 7 As shown in the figure, the musical instrument case 20 has a stopper 24. The stopper 24 is used to stop the music stand 50 in the through hole 21 when a part of the music stand 50 is arranged in the through hole 21, and the details will be described later. Specifically, the stopper 24 is a stepped surface facing downward and arranged on the front side of the through hole 21 on the bottom surface 20b side of the musical instrument case 20. Therefore, the inner wall 22 on the keyboard 11 side (front side F) in the through hole 21 and the stopper 24 are arranged approximately at a right angle (reference symbol PE).

[0033] The locking portion 24 has a position determining portion 40 that determines the position of the music stand 50. The position determining portion 40 includes a notch-shaped engaging recess 41 located at the center in the longitudinal direction of the edge (corner) on the through hole 21 side of the locking portion 24. As described later, the keyboard musical instrument 10 includes an engaging protrusion 42 (see FIG. 1 ) at a position corresponding to the position determining portion 40 in the music stand 50. Figure 8 , Fig.11 ).

[0034] like Figure 8 As shown, the music stand 50 includes: a horizontal plate 51, whose flat portion faces the up-down direction and is formed into a long strip in the left-right direction; and a back plate 52, which extends upward from the rear end edge of the horizontal plate 51 so that the size in the left-right direction is roughly the same as that of the horizontal plate 51. In addition, side walls are formed on the horizontal plate 51 and the back plate 52 along the outer shapes of the two. The horizontal plate 51 includes a plurality of grooves 51a in the left-right direction and a protrusion 51b protruding from the front end and long in the left-right direction. The back plate 52 includes long rectangular holes 52a opened at three locations on the left and right. The music stand 50 is used by placing the music score on the horizontal plate 51 and standing it against the back plate 52.

[0035] The music stand 50 includes an insertion portion 53 protruding from a central lower end 50a of the music stand 50. Specifically, the insertion portion 53 protrudes downward from the lower surface of the horizontal plate 51. The insertion portion 53 includes a front plate 53a whose width in the left-right direction is substantially the same as that of the through hole 21 (or narrower than the through hole 21). The front plate 53a includes a concave groove portion 57, an inclined portion 58, and an inner wall corresponding portion 59 described later.

[0036] The insertion portion 53 is a tapered shape in which the left and right edges narrow slightly toward the front end when viewed from the front. In other words, the width of the front plate 53a of the insertion portion 53 in the left and right directions gradually narrows slightly toward the front end. The ribs 55 connected to the left and right ends of the front plate 53a are arranged along the two ends of the front plate 53a. The inclined portion 58 of the front plate 53a is connected to the protruding portion 51b of the horizontal plate 51.

[0037] The insertion portion 53 includes a front side stopper 54, which is a front end portion of the lower side of the insertion portion 53 bent forward at a right angle to form a surface facing upward. The insertion portion 53 includes a convex engagement convex portion 42 which is convex in the substantially central portion in the left-right direction of the front side stopper 54. The position determination portion 40 includes the convex engagement convex portion 42 which is formed to be able to be concavely engaged with the concave engagement concave portion 41 of the position determination portion 40 (see Fig.13 ).

[0038] In the insertion portion 53, a concave groove portion 57 is formed on the front surface side (front surface of the front plate 53a) on the upper side than the front side locking portion 54. The concave groove portion 57 is a groove that extends in the left and right directions and has a bottom formed in a concave curved shape 57a. The insertion portion 53 includes an inclined portion 58 that is connected to the concave groove portion 57 at the top and extends upward, and is inclined in a manner that the upper side protrudes forward. The concave groove portion 57 and the inclined portion 58 are both located at a position higher than the front side locking portion 54 and the rear side locking portion 55a described later.

[0039] like Fig. 9 As shown in the figure, the insertion portion 53 includes four ribs 55 extending from the left and right ends of the front plate 53a and the rear surface of the front plate 53a toward the rear. The ribs 55 are roughly triangular in shape with the apex facing downward when viewed from the side. The ribs 55 are connected to the lower surface of the front side stopper 54 described later, the rear surface of the front plate 53a, and the lower surface of the transverse plate 51 to strengthen the insertion portion 53. In addition, the insertion portion 53 includes transverse ribs 56 between the ribs 55 to strengthen the ribs 55.

[0040] With such a structure of the insertion portion 53 , the music stand 50 is stably locked to the musical instrument case 20 in the through hole 21 of the musical instrument case 20 .

[0041] The insertion portion 53 includes a rear stopper 55a. The rear stopper 55a is disposed at the rear of each rib 55. The rear stopper 55a, when viewed from the side, includes: a convex arc edge 55a1 that bulges out in an arc shape from an edge line 55b toward the rear, and the edge line 55b extends upward from the front end of the insertion portion 53; a concave arc edge 55a2 that is concave from the convex arc edge 55a1 to a concave arc shape; and a straight edge 55a3 that extends in a straight line shape from the concave arc edge 55a2 toward the upper side. Fig.11 As shown in (a) and (b), the rear locking portion 55a is locked with the upper surface portion 30a as the upper surface of the grip portion 30 at the connection portion between the convex arc edge portion 55a1 and the concave arc edge portion 55a2. The instrument case 20 of the keyboard instrument 10 includes a fulcrum portion Q on the top surface 20a side of the grip portion 30, and the fulcrum portion Q functions as a fulcrum when the insertion portion 53 as a part of the music stand 50 is arranged in the through hole 21 and the music stand 50 is locked to the upper surface portion 30a of the grip portion 30 of the instrument case 20.

[0042] like Figure 1 , Fig.11 As shown, the insertion portion 53 as a part of the music stand 50 is arranged in the through hole 21, and the music stand is leaning against the music stand 50, and the back plate 52 is tilted in the direction of the rearward tilt (the first direction S1, refer to Fig.11 ) is generated. Thus, a rotational force is generated on the music stand 50 about the fulcrum Q. At this time, the locking portion 24 includes a point of action P of a force that resists a force in the vertical direction (second direction S2) generated by contact with the front locking portion 54 that is set as a substantially horizontal step portion.

[0043] In addition, since the back plate 52 of the music stand 50, which has a larger mass than the horizontal plate 51 and the insertion portion 53, is located at a position further back than the fulcrum portion Q, even when the music score is not standing against the music stand 50, some force is generated in the first direction S1 and the second direction S2. Therefore, even when the music score is not standing against the music stand 50, the music stand 50 can be Fig.11 However, due to the standing of the music score, the force of the point of action P becomes significantly larger. Therefore, in the state where the music stand 50 is not standing, it is easy for the music stand 50 to tilt forward around the fulcrum Q.

[0044] In addition, the insertion portion 53 of the music stand 50 includes an inner wall corresponding portion 59 and a front side stop portion 54, which correspond to the inner wall 22 and the stop portion 24 on the keyboard 11 side and are arranged approximately at right angles. That is, the inner wall corresponding portion 59 is formed as a plane that is linear in side view from the concave groove portion 57 to the front side stop portion 54, and is connected to the front side stop portion 54 approximately at right angles. When the music score stands against the music stand 50 and generates a force in the first direction S1, the inner wall corresponding portion 59 abuts against the inner wall 22 on the keyboard 11 side of the through hole 21.

[0045] The width dimension T3 of the through hole 21 in the left-right direction (see Figure 5 ) is greater than the maximum width T4 (see Figure 8 ) is large. In addition, the dimension T5 of the through hole 21 in the front-to-back direction (refer to Fig.10 (a)) is smaller than the dimension T6 from the point constituting the fulcrum portion Q of the concave arc edge 55a2 of the rear side locking portion 55a (for example, the deepest point of the concave arc edge 55a2) to the prescribed position of the inclined portion 58. As a result, the insertion of the insertion portion 53 into the through hole 21 is restricted midway, and a gap can be generated between the top surface 20a of the instrument case 20 and the lower surface of the horizontal plate 51. That is, the prescribed position refers to the position where the insertion of the insertion portion 53 into the through hole 21 is restricted. In addition, the dimension T7 from the prescribed position to the front side locking portion 54 is set to be substantially the same as the dimension T8 from the edge 22a on the keyboard 11 side of the top surface 20a of the through hole 21 to the locking portion 24, so that the locking portion 24 and the front side locking portion 54 can be locked.

[0046] In addition, the dimension T9 from the fulcrum Q to the front end of the insertion portion 53 when the music stand 50 is mounted on the musical instrument case 20 is smaller than the dimension T10 from the fulcrum Q to the bottom surface 20b of the musical instrument case 20. Therefore, even if the insertion portion 53 of the music stand 50 is inserted into the through hole 21, the front end of the insertion portion 53 does not contact the surface of the table or the like. In addition, the dimension from the locking portion 24 to the bottom surface 20b is set to dimension T11 and is substantially the same as the dimension T11 from the lower surface portion 30b of the grip portion 30 to the bottom surface 20b.

[0047] Next, the installation / removal operation of the music stand 50 will be described. The installation of the music stand 50 to the keyboard instrument 10 (instrument housing 20) is as follows: Fig.10 (b) shows that Fig.10Before the music stand 50 shown in (a) is installed, the front end of the insertion portion 53 of the music stand 50 is inserted into the through hole 21 from the upper direction of the through hole 21. At this time, the left and right ends of the insertion portion 53 (the ribs 55 at the left and right ends) of the tapered insertion portion 53 in the front view are brought into sliding contact with the guide portion 23, so that the insertion portion 53 (music stand 50) is centered in the left-right direction. Fig.11 (a) and Fig.13 As shown, the engaging concave portion 41 and the engaging convex portion 42 in the positioning portion 40 are engaged with each other in a concave-convex manner.

[0048] In addition, as another embodiment, the engagement protrusion 42 may be provided on the musical instrument case 20 side, and the engagement recess 41 may be provided on the music stand 50 side. The position determination unit 40 that determines the positional relationship between the musical instrument case 20 and the music stand 50 may be present in at least one of the musical instrument case 20 and the music stand 50.

[0049] In addition, as will be described in detail later, depending on the front and rear inclination of the music stand 50, the edge 22a and the inclined portion 58, and the upper surface portion 30a of the grip portion 30 and the convex arc edge portion 55a1 are in sliding contact with each other, and the front and rear direction of the insertion portion 53 is guided inside the through hole 21. Fig.11 As shown in (b), the locking portion 24 is locked with the front locking portion 54. Fig.11 As shown in (a) and (b), the upper surface portion 30a of the grip portion 30 is locked with the rear locking portion 55a (concave arc edge 55a2). Therefore, the user only needs to insert the insertion portion 53 into the through hole 21 to install the music stand 50 on the keyboard instrument 10 without accurate positioning.

[0050] In addition, Fig.11 In the stable state of (a) and (b), a gap G is formed between the inclined portion 58 of the insertion portion 53 and the edge 22a on the top surface 20a side of the through hole 21. Fig.12 As shown in (a), the music stand 50 is tilted forward about the fulcrum Q by the amount of the gap G. Then, the inclined portion 58 of the insertion portion 53 abuts against the edge 22a on the top surface 20a side of the through hole 21. Thereafter, when the music stand 50 is pulled upward, the edge 22a slides from the inclined portion 58 to the concave groove portion 57 and moves relatively. At the same time, the upper surface portion 30a of the grip portion 30 abutting against the concave arc edge portion 55a2 at the fulcrum Q slides against the convex arc edge portion 55a1 and moves relatively.

[0051] That is, since the convex arc edge portion 55a1 is arranged on the side of the rib 55 on the rear side of the concave groove portion 57, the locking portion 24 and the front locking portion 54 (as well as the front inner wall 22 and the inner wall corresponding portion 59) can be gradually separated through the sliding of the concave groove portion 57 and the edge 22a, and the convex arc edge portion 55a1 and the upper surface portion 30a, even if the user is not aware of it.

[0052] The edge 22a slides with the concave groove 57 and the upper surface 30a slides with the convex arc edge 55a1 when the music stand 50 is installed. In this case, the locking portion 24 and the front locking portion 54 (and the front inner wall 22 and the inner wall corresponding portion 59) gradually approach each other.

[0053] In this way, Fig.12 As shown in (b), the engagement between the front locking portion 54 and the locking portion 24 and the concave-convex engagement between the engagement convex portion 42 and the engagement concave portion 41 at the position determining portion 40 are released. Therefore, the user can easily remove the music stand 50 from the keyboard instrument 10 without any special operation by only tilting the music stand 50 slightly toward the front side F and pulling it out.

[0054] As described above, according to the embodiment of the present invention, the keyboard musical instrument 10 includes the keyboard 11 and the musical instrument case 20, and the musical instrument case 20 includes: the through hole 21 that penetrates from the top surface 20a side to the bottom surface 20b side; and the locking portion 24 that is used to lock the music stand 50 when the insertion portion 53 that is a part of the music stand 50 is arranged in the through hole 21. Thus, the music stand 50 can be locked to the musical instrument case 20 only by inserting the insertion portion 53 of the music stand 50 into the through hole 21, so that the keyboard musical instrument 10 that can easily attach the music stand 50 to the musical instrument case 20 without shaking can be provided.

[0055] In addition, the musical instrument case 20 includes a grip portion 30 provided at the center of the key arrangement direction LR and at the rear side B in the key front-rear direction FB, and the grip portion 30 includes the inner wall 22 at the rear side B which is a part of the inner wall 22 of the through hole 21. Thus, it is easy to put a hand into the through hole 21 to which the music stand 50 is mounted, and to move the keyboard instrument 10 by gripping the grip portion 30, or to perform the keyboard instrument 10 while gripping it.

[0056] In addition, the locking portion 24 includes a position determination portion 40 for determining the position at which the music stand 50 is locked. Thus, the music stand 50 can be positioned reliably.

[0057] The position determination part 40 includes an engagement recess 41, and the music stand 50 includes an engagement protrusion 42 at a position corresponding to the position determination part 40. Thus, the music stand 50 can be easily positioned without looseness by the engagement between the simple engagement recess 41 and the engagement protrusion 42.

[0058] In addition, the musical instrument case 20 has a guide portion 23 bent around the through hole 21 on the top surface 20a side of the musical instrument case 20 to guide the music stand 50 to the position determination portion 40. Thus, even if the user is not aware of it, the arrangement of the music stand 50 is guided to a predetermined locking position, so that the music stand 50 can be easily installed.

[0059] In addition, the keyboard musical instrument 10 includes a fulcrum portion Q on the top surface 20a side of the grip portion 30, and the fulcrum portion Q functions as a fulcrum when the insertion portion 53 as a part of the music stand 50 is arranged in the through hole 21 and the music stand 50 is locked to the musical instrument case 20. Therefore, when the music stand 50 is attached to or detached from the musical instrument case 20, the locking of the locking portion 24 and the front locking portion 54 and the contact between the front inner wall 22 and the inner wall corresponding portion 59 can be set / released even if the user is not aware of it.

[0060] In addition, the locking portion 24 includes a point of action portion P that resists a force in the second direction S2 generated in response to a force in the first direction S1 generated when the music stand 50 is placed partly in the through hole 21 and the music stand 50 is supported. Thus, when the music stand 50 is supported, the locking portion 24 can more reliably lock the music stand 50.

[0061] In addition, in the musical instrument case 20, the inner wall 22 on the keyboard 11 side and the stopper 24 in the through hole 21 are arranged approximately at right angles (reference numeral PE), and the music stand 50 has an insertion portion 53 protruding from the central lower end 50a, and the insertion portion 53 includes an inner wall corresponding portion 59 and a front stopper 54, and the inner wall corresponding portion 59 and the front stopper 54 are arranged approximately at right angles corresponding to the inner wall 22 on the keyboard 11 side and the stopper 24, respectively. As a result, the music stand 50 can be more reliably stopped on the musical instrument case 20 by the stopper between the front stopper 54 and the stopper 24, and the inner wall 22 on the keyboard 11 side and the inner wall corresponding portion 59 abutting against each other.

[0062] The insertion portion 53 protruding from the central lower end of the music stand 50 has a concave groove portion 57 on the front surface side above the front side locking portion 54. The concave groove portion 57 has a bottom that is concavely curved and is formed in the left-right direction. Thus, the music stand 50 can be easily removed from the musical instrument case 20 using the concave groove portion 57.

[0063] Several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope or subject matter of the invention, and are included in the invention described in the claims and their equivalents.

[0064] Description of Reference Numerals

[0065] 10 Keyboards 11 Keyboards

[0066] 12 Operation unit 13a, 13b Speaker unit

[0067] 14 input unit 20 instrument housing

[0068] 20a top surface 20b bottom surface

[0069] 21 through hole 21a rear opening

[0070] 21b rear opening 22 inner wall

[0071] 22a edge 23 guide portion

[0072] 24 locking portion 30 grip portion

[0073] 30a upper surface portion 30b lower surface portion

[0074] 40 Position determination portion 41 Engagement recess

[0075] 42 engagement protrusion 50 music stand

[0076] 50a Central lower end 51 Horizontal plate

[0077] 51a Groove 51b Protrusion

[0078] 52 back plate 52a long rectangular hole

[0079] 53 Insertion portion 53a Front plate

[0080] 54 front side locking portion 55 rib

[0081] 55a Rear side locking portion 55a1 Convex arc edge

[0082] 55a2 concave arc edge 55a3 straight edge

[0083] 55b edge line 56 transverse rib

[0084] 57 concave groove portion 57a ​​concave curved

[0085] 58 inclined portion 59 inner wall corresponding portion

[0086] G Gap P Action point

[0087] Q Fulcrum S1 1st direction

[0088] S2 2nd direction

Claims

1. A keyboard musical instrument, wherein: have: Keyboard; and A musical instrument housing, the musical instrument housing comprising: A through hole extending from the top surface side to the bottom surface side; a stopper for stopping the music stand when a part of the music stand is arranged in the through hole; and a gripping portion arranged at the rear side in the front-rear direction of the key, The gripping portion includes a portion of an inner wall of the through hole.

2. A keyboard musical instrument, wherein: have: Keyboard; and A musical instrument housing, the musical instrument housing comprising: The gripping portion is arranged at the rear side of the key in the front-rear direction and includes an inner wall of a through hole that penetrates from the top surface side to the bottom surface side in a part; and a locking portion, which is used to lock the music stand when a part of the music stand is arranged in the through hole.

3. The keyboard musical instrument according to claim 1 or 2, wherein: The gripping portion is disposed at a central portion of the key arrangement direction and at a rear side of the key front-rear direction.

4. The keyboard musical instrument according to claim 3, wherein: The grip portion includes a fulcrum portion on a top surface side thereof, the fulcrum portion functioning as a fulcrum when a part of the music stand is disposed in the through hole and the music stand is locked to the musical instrument case.

5. The keyboard musical instrument according to any one of claims 1 to 4, wherein: The locking portion includes a position determining portion that determines a position at which the music stand is locked.

6. The keyboard musical instrument according to claim 5, wherein: The position determining portion includes an engaging recess, The position of the music stand corresponding to the position determination portion includes an engaging protrusion.

7. The keyboard musical instrument according to claim 5 or 6, wherein: A guide portion bent to guide the music stand to the position determination portion is provided around the through hole on the top surface side of the musical instrument case.

8. The keyboard musical instrument according to any one of claims 1 to 7, wherein: The locking portion includes a point of action portion that resists a force in a second direction generated in response to a force in a first direction, wherein the force in the first direction is a force generated when the music score stands against the music stand when a portion of the music stand is arranged in the through hole.

9. The keyboard musical instrument according to any one of claims 1 to 8, wherein: In the musical instrument case, the inner wall of the through hole on the keyboard side is arranged substantially at a right angle to the locking portion. The music stand has an insertion portion protruding from the central lower end, and the insertion portion includes an inner wall corresponding portion and a front side stop portion, which are respectively arranged to correspond to the inner wall of the keyboard side and the stop portion and are approximately perpendicular to each other.

10. The keyboard musical instrument according to claim 9, wherein: The insertion portion protruding from the central lower end of the music stand has a concave groove portion on the front surface side above the front side locking portion, the concave groove portion has a bottom portion in a concave curved shape and is formed in the key arrangement direction.

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