Keyboard instrument

Abstract

A keyboard musical instrument includes a musical instrument body having a keyboard, a stand supporting the musical instrument body, a first fixing member for fixing the musical instrument body to the stand, a second fixing member for fixing the stand to the musical instrument body, and a third fixing member fixing the first fixing member and the second fixing member from the front to the rear of the musical instrument body.

Description

[0001] This application is a divisional application of the invention patent application filed on June 1, 2018, with application number 201810557749.4 and invention title "Keyboard Musical Instrument". Technical Field

[0002] This invention relates to keyboard instruments such as electronic keyboard instruments. Background Technology

[0003] For example, in electronic keyboard instruments, as described in Patent Document 1, a keyboard instrument is known to have a structure comprising an instrument body equipped with a keyboard unit and a support for supporting the instrument body.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2013-47832

[0005] The stand of this electronic keyboard instrument has a pair of opposing side plates and a rear plate mounted on the rear side of these side plates. In this case, guide recesses for fitting the two sides of the instrument body are provided on the upper part of each opposing surface of the pair of side plates, extending from the front end of the side plate toward the rear side. In addition, L-shaped fixing fittings are provided on the front and rear parts of the side plates located below each guide recess.

[0006] In such an electronic keyboard instrument, when the instrument body is mounted on the stand, the stand is pre-assembled, and the two sides of the instrument body are inserted from the rear side into the guide recesses provided on the opposing surfaces of a pair of side plates of the stand. In this state, screws are screwed into the bottom of the instrument body through the mounting holes provided on the L-shaped fixing fittings, thereby fixing the instrument body to the stand.

[0007] However, in such electronic keyboard instruments, when the two sides of the instrument body are embedded into the guide recesses provided on the opposing surfaces of a pair of side plates of the support, the fixing accessories for fixing the bottom screw of the instrument body to the side plates must be inserted into the lower side of the instrument body to fix the screw, which results in poor assembly operability. Summary of the Invention

[0008] The problem to be solved by the present invention is to provide a keyboard musical instrument that is easy to assemble and operate, and can reliably and well assemble the instrument body onto the stand.

[0009] The keyboard musical instrument of the present invention includes: a musical instrument body having a keyboard, a support for supporting the musical instrument body, a first fixing member for fixing the musical instrument body to the support, a second fixing member for fixing the support to the musical instrument body, and a third fixing member for fixing the first fixing member and the second fixing member from the front to the rear of the musical instrument body. Attached Figure Description

[0010] When with the following appendix Figure 1 A better understanding of this application will be achieved by considering the following detailed description.

[0011] Figure 1 This is a perspective view showing one embodiment of a keyboard instrument to which the present invention is applied.

[0012] Figure 2 yes Figure 1 The front view of the keyboard instrument shown.

[0013] Figure 3A and Figure 3B express Figure 2 The keyboard instruments shown Figure 3A This is its top view. Figure 3B This is its right-side view.

[0014] Figures 4A-4C express Figure 1 The instrument body of the keyboard instrument shown. Figure 4A This is its main view. Figure 4B This is its top view. Figure 4C This is its left-side view.

[0015] Figure 5 It means in Figure 1 The image shows an enlarged cross-sectional view of the main part of the keyboard instrument with the keyboard cover closed, viewed from the AA direction.

[0016] Figure 6 It means in Figure 5 An enlarged cross-sectional view of the main part of the keyboard instrument shown, with the keyboard cover open.

[0017] Figure 7 It means in Figure 1 An exploded perspective view of the keyboard instrument shown, with the instrument body mounted on the stand from the back side.

[0018] Figure 8 It means Figure 7 An enlarged perspective view of the main part of the fitting recess on the left side plate of the keyboard instrument's support shown.

[0019] Figure 9 It means Figure 7 An enlarged perspective view of the main part of the left side wall of the instrument body shown.

[0020] Figure 10 Viewed from the front side and below Figure 9 An enlarged perspective view of the left sidewall shown.

[0021] Figure 11A , Figure 11B Indicates in Figure 8 The side panel shown is equipped with multiple components. Figure 11A This is an exploded perspective view showing the state in which the locking part of the rear fixing component, the hook part of the position limiting component, and the reinforcing plate of the side plate fixing part in the front fixing component are installed on the side plate. Figure 11B This is an exploded perspective view showing the assembly of the side panel fixing part with guide rails installed on the side panel.

[0022] Figure 12A and Figure 12B express Figure 10 The main body fixing part of the front fixing component in the instrument body shown. Figure 12A It is an enlarged 3D diagram representing the fixed part of the main body. Figure 12B It is an enlarged perspective view showing the state of the main body after the fixing parts are assembled.

[0023] Figure 13 This indicates that the side wall of the instrument body is inserted into... Figure 7 An enlarged view of the main part of the fitting recess of the bracket shown.

[0024] Figure 14 It means in Figure 13 The image shows an enlarged view of the main part of the keyboard instrument, in which the side wall of the instrument body is fitted into the fitting recess of the support.

[0025] Figures 15A-15C It means Figure 14 The cross-sections of the main parts of the keyboard instrument shown are as follows: Figure 15A This is an enlarged sectional view showing the main part of the structure viewed from the BB direction. Figure 15B This is an enlarged sectional view showing the main part of the view in the CC direction. Figure 15C It is an enlarged sectional view showing the main part of the view in the DD direction. Detailed Implementation

[0026] The following is for reference Figure 1~Figure 2 5. An embodiment of a keyboard instrument using the present invention will be described.

[0027] like Figures 1-3B As shown, the keyboard instrument has an instrument body 2 equipped with a keyboard unit 1 and a support 3 having a pair of side plates 4 supporting the two sides of the instrument body 2.

[0028] like Figures 1-3B As shown, the bracket 3 includes a pair of side plates 4, a rear plate 5 mounted between the rear ends of the pair of side plates 4, and a pedal component 6 mounted between the lower parts of the pair of side plates 4. In this case, a plurality of foot pedals 7 are provided at the middle part of the pedal component 6 in the longitudinal direction.

[0029] like Figures 1-6 As shown, the instrument body 2 is formed in a generally box-shaped, elongated form. That is, the instrument body 2 has a horizontally elongated, plate-like base plate 8, a front plate 9 erected at the front end of the base plate 8, a pair of side wall portions 10 erected at both ends of the base plate 8 in the longitudinal direction, i.e., the left and right direction, a back plate 11 erected at the rear end of the base plate 8, and a top plate 12 provided at the upper ends of the back plate 11 and the pair of side wall portions 10.

[0030] In this case, such as Figures 1-6 As shown, the height of the front plate 9 is lower than the height of the back plate 11. The length of the top plate 12 in the front-to-back direction is shorter than the length of the bottom plate 8 in the front-to-back direction. In addition, the top plate 12 has two ends protruding from a pair of side wall portions 10 in its length direction, i.e., the left-to-right direction, and these two protruding ends are disposed on a pair of side plates 4 of the support 3. Thus, the instrument body 2 is formed into a horizontally elongated, roughly box-shaped form with the front side of the top plate 12 open upwards.

[0031] like Figures 1-6 As shown, a keyboard unit 1 is disposed inside the instrument body 2, protruding upwards and towards the front of the instrument body 2. Figure 5 and Figure 6 As shown, the keyboard unit 1 includes a keyboard base 13 disposed on the base plate 8 of the instrument body 2, a plurality of keys 14 arranged on the keyboard base 13, and a hammer component 15 that applies an action load to each key 14 according to the pressing operation of each of the plurality of keys 14.

[0032] In addition, such as Figure 5 and Figure 6 As shown, a keyboard cover 16 that can be opened and closed is provided on the instrument body 2 to cover the keyboard unit 1. The keyboard cover 16 has a front cover 17 and a rear cover 18, and the rear end of the front cover 17 and the front end of the rear cover 18 are connected in a bendable manner by a hinge 19. In this case, a front guide shaft 17a is provided at the front end of the front cover 17, and the front guide shaft 17a moves along a first guide groove 10a respectively provided on the inner surface of a pair of side wall portions 10.

[0033] In addition, such as Figure 5 and Figure 6 As shown, a rear guide shaft 18a is provided at the front end of the rear cover 18, and the rear guide shaft 18a moves along each of the first guide grooves 10a respectively provided on a pair of side wall portions 10. One end of a support arm 20 is rotatably mounted on the rear end of the rear cover 18 via a connecting shaft 20a. The other end of the support arm 20 is rotatably mounted on a support shaft 21 provided on the inner surface of the side wall portion 10, and rotates in the vertical direction around the support shaft 21.

[0034] In this case, such as Figure 5 as well as Figure 6 As shown, an auxiliary guide shaft 22 is provided on the support arm 20. The auxiliary guide shaft 22 moves along a second guide groove 10b that is arc-shaped and provided on the inner surface of the side wall portion 10, centered on the support shaft 21. A gear 23 is rotatably mounted on the auxiliary guide shaft 22. The gear 23 meshes with a rack 24 that is arc-shaped and centered on the support shaft 21, and rolls.

[0035] Therefore, as Figure 5 and Figure 6 As shown, the keyboard cover 16 is designed such that when the front cover 17 and the rear cover 18 are pulled out toward the front of the instrument body 2, the front guide shaft 17a of the front cover 17 and the rear guide shaft 18a of the rear cover 18 move along the first guide groove 10a of the side wall portion 10. Simultaneously, the support arm 20 rotates counterclockwise about the support shaft 21, pushing up the rear end of the rear cover 18. Thus, as... Figure 5 As shown, the keyboard cover 16 is disposed on the upper side of the keyboard unit 1 and covers the keyboard unit 1.

[0036] In addition, such as Figure 6 As shown, the keyboard cover 16 is designed such that when the front cover 17 and the rear cover 18 are moved toward the rear of the instrument body 2, the front guide shaft 17a of the front cover 17 and the rear guide shaft 18a of the rear cover 18 move along the first guide groove 10a of the side wall portion 10, while the rear cover 18 gradually bends relative to the front cover 17 by means of the hinge 19, and the support arm 20 rotates clockwise around the support shaft 21 to pull down the rear end of the rear cover 18.

[0037] Therefore, as Figure 6 As shown, the keyboard cover 16 is a rear cover 18 that is bent by the hinge 19 and hangs down approximately parallel to the back panel 11, while the front cover 17 is positioned approximately parallel to the lower side of the top panel 12, thereby exposing the keyboard unit 1 to the upper front side. Additionally, as... Figure 2 Figure 4~ Figure 6 As shown, speaker sections 29 are provided on the lower surface of the bottom 8 of the instrument body 2, located on the left and right sides. In addition, a music stand 12a is provided on the top plate 12 of the instrument body 2.

[0038] like Figure 7 , Figure 9 , Figure 10 and Figure 13As shown, a pair of sidewall portions 10 of the instrument body 2 are formed of synthetic resin. A first fitting portion 101 is provided on the outer side of the sidewall portion 10. The first fitting portion 101 includes a first fitting protrusion 102 provided on the upper side of the outer side of the sidewall portion 10, a first fitting recess 103 provided on the lower side of the first fitting protrusion 102 in a state that is recessed from the first fitting protrusion 102, and a first guide portion 104 provided between the first fitting protrusion 102 and the first fitting recess 103.

[0039] In addition, such as Figure 7 , Figure 8 as well as Figure 13 As shown, on the opposing surfaces of a pair of side plates 4 of the support 3, concave second fitting portions 25 are respectively provided. These second fitting portions 25 are slidably fitted into each of the first fitting portions 101 provided on a pair of side wall portions 10 of the instrument body 2. The concave second fitting portion 25 has a second fitting protrusion 251 corresponding to the first fitting recess 103 of the side wall portion 10, a second fitting recess 252 corresponding to the first fitting protrusion 102 of the side wall portion 10, and a second guide portion 253 provided between the second fitting protrusion 251 and the second fitting recess 252 and corresponding to the first guide portion 104 of the side wall portion 10.

[0040] In this case, such as Figure 7 and Figure 8 As shown, the concave second fitting portion 25 of the side plate 4 is provided from the rear end of the side plate 4 toward the front. That is, the second fitting portion 25 is such that when the front end portion 25c on the front end side of the side plate 4 is blocked, the rear end portion on the rear end side of the side plate 4 is open. In this case, the second fitting portion 25 is formed such that the depth of the side plate 4 in the thickness direction is approximately the same as the thickness of the side wall portion 10 of the instrument body 2.

[0041] That is, such as Figure 7 and Figure 8 As shown, the second fitting protrusion 251 of the second fitting portion 25 is formed to a shallow depth in the thickness direction of the side plate 4, approximately half the thickness of the side plate 4. Therefore, the second fitting protrusion 251 fits into the first fitting recess 103 of the side wall portion 10. The second fitting recess 252 of the second fitting portion 25 is formed to a deeper depth in the thickness direction of the side plate 4 than the second fitting protrusion 251. Therefore, the second fitting recess 252 fits into the first fitting protrusion 102 of the side wall portion 10.

[0042] In addition, such as Figure 8As shown, the second fitting portion 25 is such that the vertical length (opening width) of its rear side interior is longer (wider) than the vertical length (opening width) of its front side interior. That is, the second fitting recess 252 of the second fitting portion 25 is such that the vertical length (opening width) of its rear side is longer (wider) than the vertical length (opening width) of its front side.

[0043] In addition, such as Figure 8 As shown, the second fitting portion 25 includes a second guide portion 253 disposed between the second fitting protrusion 251 and the second fitting recess 252. The second guide portion 253 is configured such that its front side is located approximately at the middle of the second fitting portion 25 in the vertical direction, and its rear side is lower than its front side. A step portion is provided at approximately the middle of the second fitting portion 25 in the front-rear direction, and the whole is configured as a step.

[0044] Moreover, such as Figure 8 , Figure 13 as well as Figure 14 As shown, the upper end of the second fitting recess 252 of the second fitting portion 25 has a first upper end portion 25d that contacts the first fitting portion 101 when the first fitting portion 101 of the instrument body 2 is fitted into the second fitting portion 25, and a second upper end portion 25e that is disposed further back than the first upper end portion 25d and does not contact the first fitting portion 101.

[0045] In addition, such as Figure 8 As shown, a metal mounting portion 25a, which is slightly thinner than the side plate 4, is provided on the upper part of the side plate 4 located at the rear of the second fitting portion 25. The side plate 4 located at the rear end of the metal mounting portion 25a is thinner than the metal mounting portion 25a and is formed at the same depth as the second fitting recess 252.

[0046] Therefore, as Figure 7 , Figure 8 , Figure 13 as well as Figure 14 As shown, the second fitting portion 25 is configured such that, when the first fitting portion 101 fitting the side wall portion 10 of the instrument body 2 is fitted, the side wall portion 10 is positioned below the upper end of the rear portion of the first fitting protrusion 102, located under the metal mounting portion 25a on the upper part of the rear side. A top plate 12, which is provided on the upper part of the side wall portion 10, is disposed on the upper end surface of the metal mounting portion 25a, and a back plate 11 is disposed throughout its upper end at the open portion of the rear end. Therefore, this second fitting portion 25 hides the pair of side wall portions 10 and makes them invisible from the outside.

[0047] In addition, such as Figure 9 and Figure 10As shown, the first fitting portion 101 of the side wall portion 10 of the instrument body 2 has an outer peripheral shape that is approximately the same as the inner peripheral shape of the second fitting portion 25 of the side plate 4. The first fitting portion 101 is formed such that the thickness of the first fitting protrusion 102 extends from the front end to the rear end and the depth in the thickness direction of the second fitting recess 252 of the second fitting portion 25 is approximately the same. The thickness of the first fitting recess 103 extends from the front end to the rear end and is formed to be slightly thinner than the thickness of the second fitting protrusion 251.

[0048] In addition, such as Figure 7 , Figure 9 and Figure 10 As shown, the front side of the first fitting recess 103 is formed into a pointed shape. That is, the vertical length of the front side of the first fitting portion 101 is shorter than the vertical length of the rear end side of the second fitting portion 25 of the side plate 4. In addition, an inclined side guide portion 26 is provided on the outer surface of the first fitting recess 103.

[0049] like Figure 10 As shown, the side guide portion 26 is inclined such that the length (thickness) of the front side of the first fitting recess 103 of the first fitting portion 101 of the side wall portion 10 in the thickness direction gradually becomes shorter (thinner) compared to the length (depth) of the second fitting protrusion 251 in the thickness direction from the rear part of its front side portion, i.e., the approximately middle part in the front-rear direction, toward the front end of the first fitting portion 101 of the side wall portion 10.

[0050] In addition, such as Figure 7 , Figure 9 and Figure 10 As shown, an inclined upper guide portion 27 is provided on the upper end surface of the first fitting portion 101 of the side wall portion 10, that is, on the upper end surface of the first fitting protrusion 102. The upper guide portion 27 is inclined such that the length of the first fitting portion 101 of the side wall portion 10, which fits with the second fitting portion 25, in the vertical direction gradually shortens from the part located in front of the middle part in the front-rear direction of the rear part of the first fitting portion 101 towards the front end of the first fitting portion 101. As a result, the front parts of the pair of side wall portions 10 are formed into a pointed shape.

[0051] Therefore, as Figure 7 , Figure 13 and Figure 14 As shown, the instrument body 2 is such that when the first fitting part 101 of the side wall part 10 is inserted into the second fitting part 25 of the side plate 4 of the support 3, the front end of the side wall part 10 is formed into a pointed shape, that is, the vertical length of the rear end of the second fitting part 25 is longer than the vertical length of the front end of the first fitting part 101 of the side wall part 10, so that the front side of the first fitting part 101 is inserted into the rear side of the second fitting part 25 with a margin.

[0052] That is, such as Figure 7 , Figure 13 as well as Figure 14 As shown, the instrument body 2 has an inclined side guide 26 provided on the outer side of the front side of the first fitting part 101 of the side wall 10, which makes the thickness of the front end of the side wall 10 thinner, and an inclined upper guide 27 provided on the upper end of the front side of the side wall 10, which makes the vertical length of the front side of the first fitting part 101 of the side wall 10 shorter than the vertical length of the rear end side of the second fitting part 25.

[0053] Therefore, as Figure 13 and Figure 14 As shown, when the instrument body 2 is inserted from its rear side between a pair of side plates 4 of the support 3, the front side of each of the first fitting portions 101 in the pair of side wall portions 10 is inserted with a margin into the rear side of each of the second fitting portions 25 of the pair of side plates 4. In this case, the second fitting portion 25 is formed with an inclined portion 25b of the same shape as the upper guide portion 27 of the upper end surface of the side wall portion 10, at the first upper end portion 25d located on the front side inside the second fitting recess 252.

[0054] Therefore, as Figure 14 As shown, the second fitting portion 25 is such that when the first fitting portion 101 of the side wall portion 10 is fitted inside it, the upper end of the side wall portion 10 is in close contact with the first upper end portion 25d inside the second fitting portion 25, the upper guide portion 27 of the side wall portion 10 is in close contact with the inclined portion 25b of the second fitting portion 25, and the front end portion of the side wall portion 10 abuts or approaches the front end portion 25c inside the second fitting portion 25.

[0055] In addition, such as Figure 14 As shown, the second fitting portion 25 is such that when the first fitting portion 101 of the side wall portion 10 is fitted inside it, the upper end of the side wall portion 10 located at the rear of the first fitting protrusion 102 is disposed without contacting the lower surface of the metal mounting portion 25a on the rear upper side, i.e., the second upper end portion 25e. A back plate 11 is disposed from the lower end to the upper end of the open portion of the rear end, thereby blocking the open rear end portion.

[0056] In this case, such as Figure 9 , Figure 10 as well as Figure 13As shown, the first fitting portion 101 of the sidewall portion 10 includes a first guide portion 104 disposed between the first fitting protrusion 102 and the first fitting recess 103 and corresponding to the second guide portion 253. The first guide portion 104 is positioned slightly higher than the approximate middle portion in the vertical direction on its front side and lower than the front side on its rear side, and has a stepped portion provided at the approximate middle portion in the front-rear direction of the first fitting portion 101, and is generally configured to have the same stepped shape as the second guide portion 253.

[0057] And, as Figure 9 and Figure 10 As shown, on each of the outer surfaces of the pair of sidewall portions 10, a plurality of transverse ribs 28a, which reinforce the sidewall portion 10 along the front-rear direction, and a plurality of longitudinal ribs 28b, which reinforce the sidewall portion 10 along the vertical direction, are arranged in a grid pattern. In this case, the transverse ribs 28a and longitudinal ribs 28b located on the front side of the first fitting recess 103 of the sidewall portion 10 are arranged in an inclined state along the inclination of the side guide portion 26.

[0058] In addition, such as Figure 9 as well as Figure 10 As shown, the plurality of transverse ribs 28a are configured such that the outer ends of each of their outer sides protrude further toward the outer side of the sidewall portion 10 compared to the outer ends of each of the plurality of longitudinal ribs 28b. Therefore, as Figure 13 As shown, when the first fitting portion 101 of the side plate 4 is inserted into the second fitting portion 25, the plurality of longitudinal ribs 28b do not contact the inner surface of the second fitting portion 25, while the plurality of transverse ribs 28a slide in contact with the inner surface of the second fitting portion 25, thereby smoothly inserting into the second fitting portion 25.

[0059] On the other hand, such as Figures 7-11B As shown, a guide member 30 is provided on the bracket 3. When the first fitting portion 101 of a pair of side wall portions 10 located on both sides of the instrument body 2 slides and fits into the second fitting portion 25 of each of the pair of side plates 4, the guide member 30 guides the first fitting portion 101 of the pair of side wall portions 10 of the instrument body 2 relative to the second fitting portion 25.

[0060] like Figures 7-11B As shown, the guide member 30 includes a second engaging protrusion 251 for engaging with a pair of second engaging portions 25 respectively, and a guide rail 33 forming a guide groove 32 between itself and the second engaging protrusion 251. The guide rail 33 is mounted on a pair of side plates 4 along its front-rear direction by screws 30a. Thus, the guide rail 33 guides the guide protrusion 31 provided on the lower part of the side wall portion 10 along its front-rear direction through the guide groove 32 formed between itself and the second engaging protrusion 251.

[0061] In this case, such as Figure 8 As shown in Figure 11(b), an auxiliary rib 33a is provided on the upper part of the guide rail 33, protruding towards the opposing surfaces of the pair of side plates 4. This auxiliary rib 33a is used to prevent the instrument body 2 from accidentally falling when it is positioned between the pair of side plates 4, thus ensuring safety. Additionally, a track protrusion 33b for forming a guide groove 32 is provided along the upper end surface of the guide rail 33.

[0062] In addition, such as Figures 7-11B As shown, a front fixing component 34 is provided on the instrument body 2 and the support 3. This front fixing component 34 fixes the lower front parts of the left and right sides of the instrument body 2 and the front parts of the corresponding pair of side plates 4 from the front side of the instrument body 2 and the support 3. The front fixing component 34 fixes the instrument body 2 relative to the pair of side plates 4 of the support 3 in the front-back direction and in the left-right direction orthogonal to it.

[0063] That is, such as Figures 7-15A As shown, the front fixing member 34 includes a main body fixing part 35 respectively provided on the left and right sides of the lower surface of the base plate 8 of the instrument body 2, a side plate fixing part 36 respectively provided on the front sides of the corresponding pair of side plates 4, and a plurality of front threaded parts 37 (third fixing parts) that obliquely fasten the side plate fixing parts 36 and the main body fixing parts 35 from the front side of the instrument body 2 toward the rear side.

[0064] like Figure 8 , Figure 11A and Figure 11B , Figure 13 as well as Figure 15A As shown, the side plate fixing part 36 includes a track fixing body 38 provided on the guide rail 33 of the guide member 30 and a reinforcing plate 39 provided on a pair of side plates 4. The track fixing body 38 is provided on the front side of the guide rail 33 in an inclined state toward the rear side of the bracket 3.

[0065] like Figure 8 , Figure 11A and Figure 11B , Figure 13 as well as Figure 15A As shown, the reinforcing plate 39 is formed by bending the rear end of a metal plate obliquely toward the rear side of the bracket 3, and is installed on a pair of side plates 4 by screws 39b. That is, the obliquely bent portion of the reinforcing plate 39 passes through the opening 33c provided in the guide rail 33 and is disposed on the rear surface of the rail fixing body 38 in an inclined state toward the rear side of the pair of side wall portions 10.

[0066] In this case, such as Figure 15AAs shown, a first insertion hole 38a is provided on the track fixing body 38 for the front threaded component 37 to be inserted obliquely from the front side of the instrument body 2 toward the rear side. In addition, a second insertion hole 39a is provided on the reinforcing plate 39, corresponding to the first insertion hole 38a of the track fixing body 38, for the front threaded component 37 to be inserted.

[0067] In addition, such as Figure 10 , Figures 12A to 15A As shown, the main body fixing part 35 of the front fixing member 34 includes an instrument fixing body 40 provided on the lower front surface of the base plate 8 of the instrument body 2, and a metal threaded fixing piece 41 disposed in the instrument fixing body 40 in a state inclined toward the rear side of the instrument body 2. Figure 12A and Figure 12B As shown, the instrument fixing body 40 has a mounting part 42 that is mounted on the lower surface of the bottom 8 of the instrument body 2, and a cylindrical part 43 integrally provided on the lower surface of the mounting part 42.

[0068] like Figure 12A and Figure 12B As shown, the upper part of the cylindrical portion 43 of the instrument fixing body 40 is provided on the lower surface of the mounting portion 42 corresponding to the opening 42a of the mounting portion 42. In addition, the front part of the cylindrical portion 43 is provided on the mounting portion 42 in a state that is inclined towards the rear side of the instrument body 2, similar to the track fixing body 38.

[0069] like Figure 12A and Figure 12B As shown, the threaded retaining piece 41 is formed by bending the upper part 41b of a metal plate toward the front side of the instrument body 2. When the threaded retaining piece 41 is inserted into the cylinder 43 from the opening 42a of the mounting part 42, the bent upper part 41b is disposed in the mounting recess 42b of the mounting part 42, and in this state, it is disposed on the inner surface of the cylinder 43.

[0070] In this case, such as Figure 12A , Figure 12B and Figures 15A-15C As shown, a third insertion hole 43a is provided at the front end of the cylindrical portion 43, which allows the front threaded component 37 to be inserted obliquely from the front side of the instrument body 2 toward the rear side. In addition, on the threaded fixing plate 41, a threaded hole 41a that engages with the front threaded component 37 is provided on the same axis as the third insertion hole 43a of the instrument fixing body 40.

[0071] Therefore, as Figures 13-15AAs shown, the front fixing component 34 is configured such that when a pair of side wall portions 10 located on the left and right sides of the instrument body 2 are inserted and fitted from the rear end of the side plate 4 toward the second fitting portion 25 of each pair of side plates 4, the instrument fixing body 40 provided on each main body fixing portion 35 of the instrument body 2 and the reinforcing plate 39 provided on each side plate fixing portion 36 of each pair of side plates 4 are arranged to abut or approach each other.

[0072] In this case, such as Figure 15A As shown, the opposing surfaces of the main body fixing part 35 and the side plate fixing part 36 are inclined obliquely from the front side of the instrument body 2 toward the rear side. That is, the angle formed in front of the opposing surface relative to the inner surface of the side plate (the angle formed closer to the front of the instrument body: first angle FA) is larger than the angle formed behind the opposing surface relative to the inner surface of the side plate (the angle formed closer to the rear of the instrument body: second angle SA). In addition, the front threaded part 37 is inserted into the first insertion hole 38a, the second insertion hole 39a of the side plate fixing part 36, the third insertion hole 43a of the main body fixing part 35, and the threaded hole 41a in an obliquely inclined state from the front side of the instrument body 2 toward the rear side.

[0073] In addition, such as Figure 14 As shown in Figure 15A, the front fixing member 34 is configured on the same axis with the first insertion hole 38a provided on the track fixing body 38 of each side plate fixing part 36, the second insertion hole 39a provided on the reinforcing plate 39 of each side plate fixing part 36, the third insertion hole 43a provided on the cylindrical part 43 of the instrument fixing body 40 of each main body fixing part 35, and the threaded hole 41a provided on the bolt fixing piece 41 of each main body fixing part 35, respectively, in a state of tilting from the front to the rear.

[0074] Therefore, as shown in Figure 15A, the front fixing component 34 is such that when the front threaded component 37 is inserted from the front side of the instrument body 2 and the bracket 3 into the first insertion hole 38a of the track fixing body 38, the second insertion hole 39a of the reinforcing plate 39, and the third insertion hole 43a of the cylindrical portion 43 of the instrument fixing body 40, and the inserted front threaded component 37 is screwed into the threaded hole 41a of the threaded fixing piece 41 to be tightened, the instrument fixing body 40 moves towards the side plate fixing portion 36, thereby fixing the instrument body 2 to the bracket 3.

[0075] In this case, such as Figure 14As shown in Figure 15A, the front fixing member 34 is such that when the instrument fixing body 40 approaches and presses against the side plate fixing part 36, the front threaded member 37 fastens the instrument fixing body 40 and the side plate fixing part 35 obliquely from the front to the rear, thereby fixing the instrument body 2 relative to the bracket 3 in the front-rear direction, and simultaneously fixing the instrument body 2 relative to the bracket 3 in the left-right direction.

[0076] On the other hand, such as Figure 7 , Figures 13-15C As shown, the instrument body 2 and the support 3 include: a rear fixing member 44, which fixes the rear ends of each side wall portion 10 located on both sides of the instrument body 2 and the rear ends of each pair of side plates 4 thereon from the rear of the instrument body 2; and a position limiting member 45, which limits the position of each side wall portion 10 of the instrument body 2 relative to each second fitting portion 25 provided in the pair of side plates 4.

[0077] like Figure 7 , Figures 13-15B As shown, the rear fixing member 44 includes a locking part 46 respectively provided on the upper rear side of each of the pair of side plates 4, a fitting part 47 respectively provided on the upper rear side of each side wall part 10 located on both sides of the instrument body 2 and fitting with the locking part 46, and a rear threaded member 48 that fixes the fitting part 47 in the state of fitting with the locking part 46.

[0078] like Figure 8 , Figure 11A , Figure 11B , Figures 13-15B As shown, the locking part 46 is formed by bending the rear end of the metal plate into a roughly U-shape. A threaded hole 46a is provided at the roughly U-shaped part of the bend. With the convex side of the roughly U-shaped part facing the rear of the side plate 4, a screw 46b (see reference) is used to lock the metal plate. Figure 11B The metal mounting part 25a is installed on the upper rear side of the second fitting part 25 of the side plate 4.

[0079] like Figure 7 , Figures 13-15B As shown, the fitting part 47 is configured in a roughly U-shape on the upper rear side of the side wall portion 10 of the instrument body 2. The fitting part 47 has a threaded insertion hole 47a at the center of the roughly U-shape, and the concave side of the roughly U-shaped portion is positioned facing the front side of the instrument body 2. The locking part 46 engages with the roughly U-shaped portion in a biting state.

[0080] Therefore, as Figures 13-15BAs shown, the rear fixing member 44 is such that when a pair of side wall portions 10 located on the left and right sides of the instrument body 2 are inserted from the rear end of a pair of side plates 4 and fitted into the second fitting portion 25 of each pair of side plates 4, each locking portion 46 provided on the upper rear part of the pair of side plates 4 respectively bites into and fits into each fitting portion 47 provided on the pair of side wall portions 10 of the instrument body 2 respectively.

[0081] In addition, such as Figures 13-15B As shown, the rear fixing member 44 is such that when the locking portions 46 of the pair of side plates 4 bite into and fit into the fitting portions 47 of the pair of side wall portions 10 of the instrument body 2, the threaded holes 46a provided in the locking portions 46 and the threaded insertion holes 47a provided in the fitting portions 47 correspond on the same axis in a substantially horizontal state.

[0082] Therefore, as Figures 13-15B As shown, the rear fixing member 44 is configured such that, with the threaded holes 46a of each locking part 46 and the threaded insertion holes 47a of each fitting part 47 corresponding on the same axis, the rear threaded member 48 is inserted from the rear of the instrument body 2 into the threaded insertion holes 47a of each fitting part 47, and the inserted rear threaded member 48 is screwed into the threaded holes 46a of each locking part 46 to secure it, thereby fixing the rear of each pair of side wall parts 10 to the rear of each pair of side plates 4.

[0083] On the other hand, such as Figures 7-1 1 and Figures 13-15C As shown, the position limiting member 45 includes: a hook portion 50, which is respectively mounted to the inner surface of the front portion of each of the second fitting portions 25 provided on each of the pair of side plates 4 by screws 50a; and a locking portion 51, which is integrally provided on the front end of each of the pair of side wall portions 10 located on both sides of the instrument body 2 and respectively locking with each hook portion 50.

[0084] like Figure 8 , Figures 13-15C As shown, the hook 50 is formed by bending the front end of a metal plate into a roughly U-shape. With the bent U-shaped front end in contact or near the front end 25c within the second fitting portion 25, it is secured by screw 50a (see reference). Figure 11B It is installed inside the second fitting part 25.

[0085] like Figure 10 , Figures 13-15C As shown, the engaging portion 51 is a thin-walled portion provided at the front end of the side wall portion 10. On the surface of the thin-walled portion, a plurality of guide ribs 51a are arranged in a tooth-like pattern along the front-back direction. The hook portion 50 is engaged and locked by the guidance of the plurality of guide ribs 51a.

[0086] Therefore, as Figures 13-15CAs shown, the position limiting component 45 is configured such that when a pair of side wall portions 10 located on the left and right sides of the instrument body 2 are inserted from the rear end of a pair of side plates 4 and fitted into the second fitting portion 25 of each pair of side plates 4, each engaging portion 51 provided on the pair of side wall portions 10 of the instrument body 2 bites into and fits into each hook portion 50 respectively installed on the pair of side plates 4, thereby limiting the position of each side wall portion 10 relative to each second fitting portion 25.

[0087] Next, the function of such keyboard instruments will be explained.

[0088] When assembling this keyboard instrument, the instrument body 2 and the stand 3 are assembled independently beforehand. That is, when assembling the instrument body 2, a front plate 9 is installed at the front end of the base plate 8, and a pair of side wall portions 10 are installed on both sides of the base plate 8.

[0089] In this state, the keyboard unit 1 and keyboard cover 16 are assembled into the instrument body 2. Then, a back plate 11 is installed at the rear end of the base plate 8 of the instrument body 2, and a top plate 12 is installed on the upper part of the back plate 11 and each of the pair of side wall portions 10. After that, a speaker portion 29 is installed on the lower surface of the base plate 8 of the instrument body 2. As a result, the instrument body 2 is assembled.

[0090] On the other hand, when assembling the bracket 3, the rear plate 5 is placed between the rear ends of the pair of side plates 4 with the pair of side plates 4 facing each other, and the pedal component 6 is placed between the lower parts of the pair of side plates 4. At this time, multiple foot pedals 7 are pre-installed on the pedal component 6. Thus, the bracket 3 is assembled.

[0091] Then, the instrument body 2 is mounted on the bracket 3. At this time, the side plate fixing part 36 of the front fixing member 34, the guide rail 33 of the guide member 30, the locking part 46 of the rear fixing member 44, and the hook part 50 of the position limiting member 45 are pre-installed on the opposing surfaces of the pair of side plates 4. In this case, the reinforcing plates 39 of the front fixing member 34 are respectively installed on both sides of the front part of the opposing surface of each side plate 4, located below each of the second fitting parts 25 of the pair of side plates 4.

[0092] In this state, with the reinforcing plate 39 of the front fixing member 34 inserted into the opening 33c of the guide rail 33, the guide rail 33 is fixed to the opposing surfaces of each side plate 4 located below the second fitting part 25 by screws 30a. As a result, a guide groove 32 is formed between the track protrusion 33b of the guide rail 33 and the inner surface of the second fitting part 25.

[0093] In this case, since a reinforcing plate 39 is disposed behind the track fixing body 38 which is provided on the front fixing member 34 of the guide rail 33, the track fixing body 38 is reinforced by the reinforcing plate 39. At this time, the first insertion hole 38a of the track fixing body 38 and the second insertion hole 39a of the reinforcing plate 39 correspond on the same axis in a state of inclination from the front side to the rear side.

[0094] Furthermore, with the locking portion 46 of the rear fixing member 44 bent into a roughly U-shape facing the rear of the side plate 4, the locking portion 46 is installed onto the metal mounting portion 25a provided on the upper rear side of each of the second fitting portions 25 of the pair of side plates 4 using screws 46b. Similarly, with the hook portion 50 of the position limiting member 45 bent into a roughly U-shape in contact with or close to the front end portion 25c inside the second fitting portion 25 of the side plate 4, the hook portion 50 is installed into the second fitting portion 25 using screws 50a.

[0095] On the other hand, the main body fixing part 35 of the front fixing part 34 is installed on both sides of the lower surface of the base plate 8 on the front side of the instrument body 2. At this time, the main body fixing part 35 of the front fixing part 34 is pre-assembled. That is, the threaded fixing piece 41 is inserted into the cylindrical part 43 of the instrument body 40 from the opening 42a of the mounting part 42 of the instrument body 40, the upper part 41b of the threaded fixing piece 41 is disposed in the mounting recess 42b of the mounting part 42, and the threaded fixing piece 41 is disposed on the inner surface of the rear side of the cylindrical part 43.

[0096] Therefore, the third insertion hole 43a of the cylindrical portion 43 of the instrument fixing body 40 and the threaded hole 41a of the threaded fixing piece 41 are aligned on the same axis in a state of inclination from the front to the rear side. Thus, the main body fixing part 35 is assembled. The mounting part 42 of this main body fixing part 35 is mounted on both sides of the lower front surface of the base plate 8 of the instrument body 2. Thus, the main body fixing part 35 is mounted on both sides of the lower front surface of the base plate 8 of the instrument body 2.

[0097] Furthermore, at this time, the fitting portion 47 of the rear fixing member 44 is integrally provided on the upper rear side of each of the pair of side wall portions 10 with the concave side of its generally U-shaped portion facing forward. In addition, the engaging portion 51 of the position limiting member 45 is integrally provided on the front end of each of the pair of side wall portions 10 with its front side facing forward of the instrument body 2.

[0098] In this state, the instrument body 2 is mounted on the support 3. In this case, the first fitting portions 101 of each pair of sidewall portions 10 located on the left and right sides of the instrument body 2 are inserted into the second fitting portions 25 respectively provided on the opposing surfaces of the pair of side plates 4. At this time, with the pair of side plates 4 upright and the support 3 upright, the first fitting portions 101 of each pair of sidewall portions 10 of the instrument body 2 are inserted into the second fitting portions 25 of the pair of side plates 4 from the rear of the support 3.

[0099] In this case, the vertical length (opening width) of the interior of the rear side of the second fitting portion 25 is longer (wider) than the vertical length (wider) of the interior of the front side of the second fitting portion 25, and the vertical length of the rear end portion inside the second fitting portion 25 is longer than the vertical length of the front side of the first fitting portion 101 of the sidewall portion 10. Therefore, the front sides of each of the first fitting portions 101 of the pair of sidewall portions 10 can be easily and well inserted into the rear side of each of the second fitting portions 25 with sufficient clearance.

[0100] Furthermore, the front portions of the pair of sidewall portions 10 are formed into a tapered shape, thereby allowing the front portions of the pair of sidewall portions 10 to be easily inserted into the rear portions of each of the second fitting portions 25. That is, the length in the left-right direction of the front end of the first fitting recess 103 in the sidewall portion 10 of the instrument body 2 is shorter than the length in the left-right direction of the rear end of the first fitting recess 103, thus allowing the front portions of each of the first fitting portions 101 of the pair of sidewall portions 10 to have sufficient margin and to be easily and well inserted into the rear portions of each of the second fitting portions 25.

[0101] In this case, since a side guide 26 is provided on the outer side of the front portion of the first fitting recess 103 of the side wall portion 10 of the instrument body 2, the thickness of the front end of the side wall portion 10 is reduced due to the side guide 26. Therefore, the length between the front ends of the pair of side wall portions 10 in the left-right direction of the instrument body 2 is shorter than the length between the opposing surfaces in the second fitting portions 25 of the pair of side plates 4 of the support 3.

[0102] Therefore, in this keyboard instrument, when the first fitting portion 101 of each pair of side wall portions 10 of the instrument body 2 is inserted into the second fitting portion 25 of each pair of side plates 4, since the front side of each pair of side wall portions 10 is formed into a pointed shape, the front side of each pair of side wall portions 101 can be inserted into the rear side of each second fitting portion 25 easily and well with sufficient margin.

[0103] At this time, auxiliary ribs 33a protrude from the inner surfaces of the opposing side plates 4 on the guide rail 33 of the guide member 30. Therefore, when the instrument body 2 is inserted between the pair of side plates 4 from the rear, the lower parts of the pair of side wall portions 10 located on both sides of the instrument body 2 can be positioned on the auxiliary ribs 33a. Thus, the instrument body 2 can be prevented from falling accidentally, thereby ensuring safety.

[0104] In this state, the guide protrusions 31 at the lower part of each of the first fitting portions 101 of the pair of sidewall portions 10 on the instrument body 2 are positioned in the guide grooves 32 formed between the track protrusions 33b of each guide rail 33 mounted on the pair of side plates 4 and the inner surfaces of each of the second fitting portions 25 of the pair of side plates 4. At this time, the front sides of the pair of sidewall portions 10 are formed into a pointed shape, thereby making it easy and good to position each of the guide protrusions 31 of the pair of sidewall portions 10 in the guide grooves 32 formed between each of the second fitting portions 25 of the pair of side plates 4.

[0105] Thus, when the instrument body 2 is moved toward the front of the pair of side plates 4, each guide protrusion 31 of the pair of side wall portions 10 slides along the guide groove 32 formed between the inner surface of each second fitting portion 25 of the pair of side plates 4 and the track protrusion 33b. At this time, the outer ends of each of the plurality of transverse ribs 28a provided on each of the outer surfaces of the pair of side wall portions 10 protrude toward the outer side of the side wall portion 10 more than the outer ends of each of the plurality of longitudinal ribs 28b located on the outer side.

[0106] Therefore, when the first fitting portion 101 of each pair of sidewall portions 10 is inserted into the second fitting portion 25 of each pair of side plates 4, the plurality of longitudinal ribs 28b will not contact the inner surface of each second fitting portion 25, and the plurality of transverse ribs 28a will slide along the inner surface of each second fitting portion 25. Thus, the plurality of longitudinal ribs 28b will not damage the inner surface of each second fitting portion 25, and the plurality of transverse ribs 28a allow the pair of sidewall portions 10 to slide smoothly into each second fitting portion 25.

[0107] Thus, when each of the first fitting portions 101 of a pair of sidewall portions 10 of the instrument body 2 is fitted into each of the second fitting portions 25 of a pair of side plates 4, the first fitting protrusion 102 of the first fitting portion 101 is disposed in the second fitting recess 252 of the second fitting portion 25, and the first fitting recess 103 of the first fitting portion 101 is disposed in the second fitting protrusion 251 of the second fitting portion 25. Therefore, the first guide portion 104 of the first fitting portion 101 and the second guide portion 253 of the second fitting portion 25 are correspondingly arranged.

[0108] In this state, the upper end of the first engaging protrusion 102 of the first engaging portion 101 contacts the first upper end 25d of the second engaging recess 252 of the second engaging portion 25, but does not contact the second upper end 25e of the second engaging recess 252. Therefore, the upper guide portion 27 provided on the front side of the upper end of the side wall portion 10 is in close contact with the inclined portion 25b of the first upper end 25d of the second engaging recess 252 of the second engaging portion 25, and the front end of the side wall portion 10 abuts against or approaches the front end 25c inside the second engaging portion 25.

[0109] Furthermore, at this time, the main body fixing part 35 of the front fixing member 34 of the instrument body 2 abuts or approaches the side plate fixing part 36 of the front fixing member 34 of the pair of side plates 4. In addition, the fitting part 47 of the rear fixing member 44 of the pair of side wall parts 10 of the instrument body 2 engages with the locking part 46 of the rear fixing member 44 of the pair of side plates 4, and the locking part 51 of the limiting member 45 of the pair of side wall parts 10 of the instrument body 2 engages with the hook part 50 of the limiting member 45 of the pair of side plates 4.

[0110] In this state, the opposing surfaces of the main body fixing portion 35 of the front fixing member 34 and the side plate fixing portion 36 are in contact or approach each other in a state of tilting from the front to the rear side of the instrument body 2. In addition, at this time, the first insertion hole 38a provided on the track fixing body 38 of the side plate fixing portion 36 of the front fixing member 34, the second insertion hole 39a provided on the reinforcing plate 39 of each side plate fixing portion 36, the third insertion hole 43a provided on the cylindrical portion 43 of the instrument fixing body 40 of each main body fixing portion 35, and the threaded hole 41a provided on the threaded fixing piece 41 of each main body fixing portion 35 are on the same axis in a state of tilting from the front to the rear side.

[0111] Thus, the front threaded component 37 is inserted from the front of the instrument body 2 and the bracket 3 into the first insertion hole 38a of the track fixing body 38, the second insertion hole 39a of the reinforcing plate 39, and the third insertion hole 43a of the cylindrical portion 43 of the instrument fixing body 40, and the inserted front threaded component 37 is screwed into the threaded hole 41a of the threaded fixing piece 41 and tightened.

[0112] Therefore, the instrument fixing body 40 is positioned close to the side plate fixing part 36, and the instrument body 2 is fixed to the bracket 3. At this time, with the front threaded part 37 tilted from the front to the rear side of the instrument body 2, the main body fixing part 35 of the front fixing part 34 and the side plate fixing part 36 are fastened in a tilted manner from the front to the rear side of the instrument body 2. Thus, the instrument body 2 is fixed relative to the bracket 3 in its front-rear direction, and the instrument body 2 is also simultaneously fixed relative to the bracket 3 in its left-right direction.

[0113] Furthermore, in this state, the threaded hole 46a on the locking portion 46 of the rear fixing member 44 and the threaded insertion hole 47a on the fitting portion 47 of the rear fixing member 44 are coaxially aligned in a substantially horizontal state. This allows the rear threaded member 48 of the rear fixing member 44 to be inserted into the threaded insertion hole 47a of the fitting portion 47 from the rear of the instrument body 2, and the inserted rear threaded member 48 to be screwed into the threaded hole 46a of the locking portion 46 for secure fastening. Thus, with the locking portion 46 further engaged with the fitting portion 47, the rear portions of the pair of sidewall portions 10 are fixed to the rear portions of the pair of side plates 4.

[0114] Furthermore, in this state, the engaging portions 51 of the limiting members 45 respectively provided on the pair of side wall portions 10 of the instrument body 2 further engage and fit into each hook portion 50 of the limiting members 45 respectively provided on the pair of side plates 4. At this time, the engaging portion 51 is a thin-walled portion provided at the front end of the side wall portion 10, and on the surface of this thin-walled portion, a plurality of guide ribs 51a are arranged in a tooth-like pattern along the front-back direction. Therefore, the engaging portion 51 is guided by the plurality of guide ribs 51a to engage and lock into the hook portion 50.

[0115] Therefore, when a pair of sidewall portions 10 of the instrument body 2 are inserted from the rear end of a pair of side plates 4 and fitted into the second fitting portion 25 of each pair of side plates 4, the engaging portion 51 of the pair of sidewall portions 10 bites into and fits into the hook portion 50 of each pair of side plates 4, thereby correctly and well restricting the position of the pair of sidewall portions 10 relative to the second fitting portion 25 of each pair of side plates 4.

[0116] Therefore, by limiting the fitting position of each first fitting portion 101 of a pair of side wall portions 10 of the instrument body 2 relative to each second fitting portion 25 provided in a pair of side plates 4, it is possible to prevent the front end portion 25c of the second fitting portion 25 from being damaged by the impact caused by the front end portion of each first fitting portion 101 of a pair of side wall portions 10 abutting against the front end portion 25c of the second fitting portion 25, and to enable each first fitting portion 101 of each side wall portion 10 to fit into each second fitting portion 25 with high precision and good fit.

[0117] Thus, when the pair of sidewall portions 10 located on both sides of the instrument body 2 are installed between the pair of side plates 4 of the bracket 3, the two ends of the top plate 12 located in the left-right direction of the instrument body 2 are disposed at the upper ends of the pair of side plates 4, and the two ends of the back plate 11 located in the left-right direction of the instrument body 2 are disposed in the rear ends of each of the second fitting portions 25 of the pair of side plates 4. Therefore, the pair of sidewall portions 10 of the instrument body 2 are hidden and cannot be seen from the outside, thus simplifying the appearance and improving the design.

[0118] When using such a keyboard instrument, firstly, the keyboard cover 16 is retracted into the rear side of the instrument body 2, so that the keyboard unit 1 is exposed to the outside and upward. At this time, the front cover 17 and the rear cover 18 of the keyboard cover 16 are moved toward the rear side of the instrument body 2. Then, the front guide shaft 17a of the front cover 17 and the rear guide shaft 18a of the rear cover 18 move along the first guide groove 10a of the side wall portion 10, while the rear cover 18 is gradually bent relative to the front cover 17 by the hinge 19 in a way that the rear part is lowered.

[0119] At this time, the support arm 20 rotates clockwise around the support shaft 21, and the rear end of the rear cover 18 is pressed down. Therefore, as Figure 6 As shown, the keyboard cover 16 is stored in the rear part of the instrument body 2 with the rear cover 18, which is bent by the hinge 19, hanging down approximately parallel to the back plate 11, and the front cover 17 being approximately parallel to the lower side of the top plate 12. As a result, the keyboard unit 1 is exposed to the upper front side.

[0120] In this state, the multiple keys 14 of the keyboard unit 1 exposed from the instrument body 2 can be pressed to perform the performance. That is, when the multiple keys 14 of the keyboard unit 1 are pressed, the hammer member 15 corresponding to the key 14 being pressed rotates, applying an action load to the pressed key 14. Therefore, a key touch similar to that of an acoustic piano can be obtained, thus enabling good performance and allowing the musical tones corresponding to the performance to be well emitted from the speaker unit 29.

[0121] Furthermore, when not playing the keyboard instrument, the front cover 17 and rear cover 18 of the keyboard cover 16 can be pulled out towards the front of the instrument body 2 to cover the keyboard unit 1. At this time, the front guide shaft 17a of the front cover 17 and the rear guide shaft 18a of the rear cover 18 move along the first guide groove 10a of the side wall portion 10. Simultaneously, the support arm 20 rotates counterclockwise around the support shaft 21, pushing up the rear end of the rear cover 18. Thus, the keyboard cover 16 is positioned on the upper side of the keyboard unit 1 and covers the keyboard unit 1.

[0122] Thus, according to this keyboard instrument, it includes an instrument body 2 with a keyboard unit 1, a support 3 for supporting the instrument body 2, a first fixing part, namely a main body fixing part 35, for fixing the instrument body 2 to the support 3, a second fixing part, namely a side plate fixing part 36, for fixing the support 3 to the instrument body 2, and a third fixing part, namely a front threaded part 37, for fixing the main body fixing part 35 and the side plate fixing part 36 in the front-rear direction of the instrument body 2. This allows for the instrument body to be assembled to the support in a way that is easy to operate, reliable and efficient.

[0123] That is, in this keyboard instrument, with the instrument body 2 supported on the bracket 3, the front threaded member 37 can be inserted from the front of the instrument body 2 to fix the main body fixing part 35 and the side plate fixing part 36. Therefore, it is not necessary to go to the lower side of the instrument body 2 to fix the instrument body 2 to the bracket 3. Thus, the instrument body can be assembled to the bracket in a good manner with good operability and reliability.

[0124] In this case, the main body fixing part 35, which is the first fixing part, includes an instrument fixing body 40 with a third insertion hole 43a and a threaded fixing piece 41 with a threaded hole 41a. The side plate fixing part 36, which is the second fixing part, includes a track fixing body 38 with a first insertion hole 38a and a reinforcing plate 39 with a second insertion hole 39a. The front threaded part 37, which is the third fixing part, passes through the first insertion hole 38a, the second insertion hole 39a and the third insertion hole 43a, which are respectively arranged in the front and rear directions of the instrument body 2, and is screwed into the threaded hole 41a. Thus, the main body fixing part 35 and the side plate fixing part 36 can be reliably fixed from the front of the instrument body 2 by the front threaded part 37.

[0125] That is, when the pair of sidewall portions 10 of the instrument body 2 are positioned between the pair of side plates 4 of the support 3, the front fixing member 34 enables the front surface of the main body fixing portion 35, which is provided on the front side of the lower surface of the instrument body 2, to correspond with the rear surface of the side plate fixing portion 36, which is provided on the front side of the opposing surface of the side plate 4. Therefore, in this state, the front threaded member 37 can be inserted from the front side of the instrument body 2 into the first insertion hole 38a, the second insertion hole 39a, and the third insertion hole 43a, and the inserted front threaded member 37 can be screwed into the threaded hole 41a for fastening, thus reliably fixing the main body fixing portion 35 and the side plate fixing portion 36.

[0126] Furthermore, the front fixing component 34 is an opposing surface of the main body fixing part 35 and the side plate fixing part 36 that abut or approach each other, and is obliquely arranged from the front side of the instrument body 2 toward the rear side. The front threaded component 37 is obliquely inserted from the front side of the instrument body 2 toward the rear side into the first insertion hole 38a, the second insertion hole 39a and the third insertion hole 43a. The inserted front threaded component 37 is screwed into the threaded hole 41a, thereby reliably fixing the main body fixing part 35 and the side plate fixing part 36 in the front-back direction and the left-right direction.

[0127] That is, in this keyboard instrument, the front fixing part 34 can fix the instrument body 2 relative to a pair of side plates 4 of the support 3 in both the front-back direction and the left-right direction orthogonal to the front-back direction, thereby enabling the instrument body to be assembled onto the support in a good manner with good operability and reliability.

[0128] In this case, the main body fixing part 35 of the front fixing part 34 is provided on the front side of the lower surface of the instrument body 2, and the side plate fixing part 36 of the front fixing part 34 is provided on the front side of the bracket 3 at a position corresponding to the front side of the main body fixing part 35. The front threaded part 37 of the front fixing part 34 can fix the main body fixing part 35 and the side plate fixing part 36 from the front of the instrument body 2. Thus, when the instrument body 2 is supported on the bracket 3, the main body fixing part 35 and the side plate fixing part 36 can be fixed from the front of the instrument body 2 through the front threaded part 37. Therefore, it is not necessary to enter the lower side of the instrument body 2 to fix the instrument body 2 to the bracket 3.

[0129] Furthermore, this keyboard instrument is equipped with a guide member 30, which is provided on the opposing surfaces of the instrument body 2 and the pair of side plates 4 and guides the side wall portion 10 of the instrument body 2. Therefore, when the instrument body 2 is placed between the pair of side plates 4, the side wall portion 10 of the instrument body 2 can be guided well by the guide member 30, thereby enabling the instrument body to be assembled onto the stand in a way that is easy to operate, reliable and efficient.

[0130] That is, the guide member 30 has a guide rail 33 for guiding the lower end of the side wall portion 10. Thus, when the instrument body 2 is placed between the side plates 4, the side wall portion 10 of the instrument body 2 can be smoothly and well guided by the guide rail 33, thereby enabling the side wall portion 10 to reliably and well fit into the second fitting portion 25.

[0131] In this case, the guide rail 33 is mounted on the side plate 4 along its front-back direction, and a guide groove 32 is formed between it and the second fitting portion 25 for guiding the guide protrusion 31 of the side wall portion 10. Therefore, when the instrument body 2 is placed between the side plates 4, the guide protrusion 31 of the side wall portion 10 can be smoothly and well guided by the guide groove 32, thereby enabling the side wall portion 10 to reliably and well fit into the fitting recess 25 of the side plate 4.

[0132] Furthermore, in this keyboard instrument, fitting recesses 25 are provided from the rear ends of each pair of side plates 4 toward the front, for fitting the pair of side wall portions 10 of the instrument body 2. This allows the pair of side wall portions 10 of the instrument body 2 to slide into the fitting recesses 25 provided on the pair of side plates 4 from the rear of the pair of side plates 4, thereby improving assembly operability and hiding the pair of side wall portions 10 of the instrument body 2 from the outside, thus improving design.

[0133] That is, the second fitting portion 25 is configured such that the front end portion 25c located on the front side of the instrument body 2 is blocked, the rear side of the instrument body 2 is open, and the front end portion of the side wall portion 10 abuts or approaches the front end portion 25c of the fitting recess 25. Thus, when the side wall portion 10 is fitted into the second fitting portion 25, the side wall portion 10 can be hidden from the outside, thereby improving the design.

[0134] In this case, the two ends of the top plate 12 of the instrument body 2 are disposed at the upper ends of a pair of side plates 4, and the two ends of the back plate 11 are disposed in the rear ends of each of the second fitting portions 25 of the pair of side plates 4. Therefore, the upper and rear ends of the pair of side wall portions 10 can be reliably hidden from the outside, thereby making the overall appearance of the keyboard instrument simple and thus further improving the design.

[0135] Furthermore, according to this keyboard instrument, it includes an instrument body 2 with a keyboard unit 1, a support 3 supporting the instrument body 2, a first fixing member, i.e., a fitting part 47, for fixing the instrument body 2 to the support 3, a second fixing member, i.e., a locking part 46, for fixing the support 3 to the instrument body 2, and a fixing member, i.e., a rear threaded part 48, for fixing the fitting part 47 and the locking part 46 in the front-rear direction of the instrument body 2. Thus, it is possible to assemble the instrument body to the support in a way that is easy to operate, reliable and good.

[0136] That is, in this keyboard instrument, similar to the front fixing part 34, the rear threaded part 48 can be inserted from the rear of the instrument body 2 while the instrument body 2 is supported on the bracket 3 to fix the fitting part 47 and the locking part 46. Therefore, it is not necessary to enter the lower side of the instrument body 2 to fix the instrument body 2 to the bracket 3. Thus, the instrument body can be assembled to the bracket in a good manner with good operability and reliability.

[0137] In this case, the fitting part 47, which is the first fixing member, has a threaded insertion hole 47a, and the locking part 46, which is the second fixing member, has a threaded hole 46a. The rear threaded member 48, which is the fixing member, passes through the threaded insertion hole 47a of the fitting part 47 and is screwed into the threaded hole 46a of the locking part 46 while the threaded hole 46a and the insertion hole 47a are arranged along the front-rear direction of the instrument body 2. Thus, the fitting part 47 and the locking part 46 can be reliably fixed from the rear of the instrument body 2 by means of the rear threaded member 48.

[0138] Furthermore, in this keyboard instrument, the fitting part 47 of the rear fixing member 44 is provided at the rear end of the instrument body 2, and the locking part 46 of the rear fixing member 44 is provided at the position corresponding to the fitting part 47 at the rear end of the side plate 4 of the support 3. The rear threaded member 48 fixes the fitting part 47 and the locking part 46 from the rear of the instrument body 2. Therefore, it is not necessary to fix the fitting part 47 and the locking part 46 from the rear of the instrument body 2 through the rear threaded member 48 while the instrument body 2 is supported on the support 3. Therefore, it is not necessary to enter the lower side of the instrument body 2 to fix the instrument body 2 to the support 3.

[0139] In this case, the rear fixing member 44 has its locking portion 46 having its rear end bent into a roughly U-shape. The convex side of the rear end of the bent roughly U-shape is installed on the upper rear part of each of the fitting recesses 25 of the pair of side plates 4 with the rear of the convex side facing the rear of the side plate 4. The fitting portion 47 of the rear fixing member 44 is provided on the upper rear part of each of the pair of side wall portions 10 with the recess side of the roughly U-shape facing the front. Therefore, the locking portion 46 can be engaged with the fitting portion 47, and the rear ends of each of the pair of side wall portions 10 and the rear ends of each of the pair of side plates 4 are fixed.

[0140] That is, the rear fixing member 44 can insert the rear threaded member 48 from the rear of the instrument body 2 into the threaded insertion hole 47a of the fitting part 47 while the threaded hole 46a of the locking part 46 and the threaded insertion hole 47a of the fitting part 47 are aligned on the same axis, and screw the inserted rear threaded member 48 into the threaded hole 46a of the locking part 46 to secure it. Therefore, the rear of the pair of side wall parts 10 and the rear of the pair of side plates 4 can be firmly fixed while the locking part 46 is reliably engaged with the fitting part 47.

[0141] Furthermore, this keyboard instrument includes a position limiting member 45 that restricts the position of a pair of sidewall portions 10 of the instrument body 2 relative to the fitting recesses 25 provided in the pair of side plates 4. As a result, when the sidewall portions 10 of the instrument body 2 are fitted into the fitting recesses 25 provided in the pair of side plates 4, the pair of sidewall portions 10 of the instrument body 2 can be accurately and well limited in the fitting recesses 25 provided in the pair of side plates 4.

[0142] That is, the position limiting member 45 has hooks 50 respectively provided in the front end of each fitting recess 25, and engaging portions 51 respectively provided in the front end of each pair of side wall portions 10 of the instrument body 2 and engaging with the hooks 50. Thus, when the pair of side wall portions 10 of the instrument body 2 are arranged in each fitting recess 25 provided in the pair of side plates 4, the engaging portions 51 can engage with the hooks 50, thereby accurately and well limiting the pair of side wall portions 10 of the instrument body 2 in each fitting recess 25 provided in the pair of side plates 4.

[0143] Furthermore, in the above embodiment, it is described that the side guide portion 26 and the upper guide portion 27 provided on the front side of the first fitting portion 101 of the pair of side wall portions 10 of the instrument body 2 are formed as straight inclined portions. However, the present invention is not limited to this. For example, it may be a stepped inclined portion with a stepped inclination, or it may be a gently curved portion.

[0144] Furthermore, in the above embodiment, it is described that the second fitting portion 25 is provided on each of the opposing surfaces of a pair of side plates of the support 3. However, the present invention is not limited to this. For example, the second fitting portion 25 may be provided only on the opposing surface of one of the opposing surfaces of the pair of side plates 4.

[0145] Furthermore, in the above embodiment, it was described that a second fitting portion 25 is provided on each opposing surface of a pair of side plates of the support 3. However, the present invention does not necessarily require the second fitting portion 25 to be provided on the side plates. It is also possible to provide a guide rail 33 on each opposing surface of a pair of side plates without providing the second fitting portion 25. In this case, it is not necessary to insert the instrument body 2 from the rear side of the support 3. The instrument body can be inserted from the front side of the support 3, or it can be inserted from the top of the support 3.

[0146] Furthermore, in the above-described embodiment, it is described that when the main body fixing part 35 of the front fixing part 34 is fastened to the side plate fixing part 36 by means of the front threaded part 37, the fastening is performed with the front threaded part 37 tilted from the front side of the instrument body toward the rear side. However, the present invention is not limited to this. For example, the front threaded part 37 may be further tilted from the front side toward the rear side of the instrument body while tilting from the front side toward the rear side, thereby fastening the main body fixing part 35 and the side plate fixing part 36 with the front threaded part 37 tilted in the three-dimensional direction.

[0147] In this way, when the main body fixing part 35 and the side plate fixing part 36 are fastened with the front threaded part 37 tilted in the three-dimensional direction, the instrument body 2 can be fixed relative to the bracket 3 in the front-back direction, left-right direction and up-down direction. Therefore, compared with the above embodiment, the instrument body 2 can be installed on the bracket 3 more firmly and efficiently.

[0148] Furthermore, in the above embodiment, it is described that the main body fixing part 35 is provided on the front side of the lower surface of the base plate 8 of the instrument body 2, and the side plate fixing part 36 is provided on the front side of the opposite surface of the side plate 4. However, the present invention is not limited to this. For example, it may be configured such that the main body fixing part 35 is provided on the rear side of the lower surface of the base plate 8 of the instrument body 2, and the side plate fixing part 36 is provided on the rear side of the opposite surface of the side plate 4, and the main body fixing part 35 and the side plate fixing part 36 are fixed from the rear of the instrument body 2 by the front threaded member 37.

[0149] Furthermore, in the above embodiment, it is described that the instrument body 2 is fixed to the bracket 3 by the front fixing member 34 and the rear fixing member 44. However, the present invention is not limited to this. For example, the instrument body 2 may be fixed to the bracket 3 by the front fixing member 34 alone, or the instrument body 2 may be fixed to the bracket 3 by the rear fixing member 44 alone.

[0150] In addition, in the above embodiment, when the instrument body 2 is mounted on the support, the instrument body 2 is moved relative to the support. However, the present invention is not limited to this. For example, the support 3 can be moved relative to the instrument body 2. Alternatively, both the instrument body 2 and the support 3 can be moved.

[0151] The specific embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit and scope of the present invention. Those skilled in the art should understand that various modifications and variations can be made to the present invention without departing from its spirit or scope. Therefore, the present invention includes changes and variations falling within the scope of the appended patent claims and their equivalents. In particular, any combination of any two or more of the above embodiments and their variations can be considered within the scope of the present invention.

Claims

1. A keyboard musical instrument, comprising: The instrument body with a keyboard, The support bracket that supports the instrument body The first fixing component is used to fix the instrument body to the bracket. The second fixing component is used to fix the bracket to the instrument body, and A third fixing component that secures the first fixing component and the second fixing component from the front to the rear of the instrument body. The first fixing component and the second fixing component abut or approach each other, and the angle between the opposing surfaces of the first fixing component and the second fixing component and the inner surface of the bracket is set such that the angle of the front side of the opposing surfaces is greater than the angle of the rear side of the opposing surfaces.

2. The keyboard instrument according to claim 1, wherein, The first fixing component has a first hole. The second fixing component has a second hole. The third fixing component is inserted from the front of the instrument body through the first hole and the second hole, which are disposed opposite to each other in the front-rear direction of the instrument body.

3. The keyboard instrument according to claim 1, wherein, The first fixing component is disposed on the front side of the lower surface of the instrument body. The second fixing component is disposed on the front side of the bracket at a position corresponding to the front side of the first fixing component. The third fixing component secures the first fixing component and the second fixing component from the front of the instrument body.

4. The keyboard instrument according to claim 1, wherein, The first fixing component consists of two parts, which are respectively located on the left and right front sides of the lower surface of the instrument body. The number of the second fixing components is two, and they are respectively disposed on the front side of a pair of side plates of the bracket, corresponding to the first fixing component.

5. The keyboard instrument according to claim 1, wherein, It includes a position limiting component that limits the position of the instrument body relative to the support.

6. The keyboard instrument according to claim 5, wherein, The position limiting component includes: a hook portion disposed at the front end of the bracket; and an engaging portion disposed at the front end of the instrument body, engaging with the hook portion.

7. The keyboard instrument according to claim 1, wherein, The second fixing component is disposed on a guide rail that guides the instrument body into the bracket. The second fixing component has a track fixing body disposed on the guide rail and a pair of reinforcing plates disposed on the side plates of the bracket.

8. The keyboard instrument according to claim 7, wherein, The track fixing body is provided with a first insertion hole for the third fixing component to be inserted from the front side to the rear side of the instrument body. The reinforcing plate is provided with a second insertion hole for the third fixing component to be inserted, and the second insertion hole is coaxial with the first insertion hole of the track fixing body.

9. The keyboard instrument according to claim 1, wherein, The first fixing component includes an instrument fixing body disposed on the front side of the lower surface of the instrument body, and a fixing piece disposed within the instrument fixing body in a state inclined toward the rear side of the instrument body. The musical instrument fixing body includes a mounting part installed on the lower surface of the musical instrument body, and a cylindrical part disposed on the lower surface of the mounting part.

10. The keyboard instrument according to claim 9, wherein, The upper part of the cylindrical portion is disposed on the lower surface of the mounting portion corresponding to the opening of the mounting portion. The front part of the cylindrical section is positioned at an angle toward the rear of the instrument body in the mounting section.

11. The keyboard instrument according to claim 9, wherein, A third insertion hole is provided at the front end of the cylindrical part, the third insertion hole allowing the third fixing component to be inserted from the front side of the instrument body toward the rear side. On the fixing plate, a threaded hole that engages with the third fixing component is provided on the same axis as the third insertion hole.

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