Lid member and keyboard instrument

Abstract

To provide a lid member which can secure strength and a keyboard instrument equipped with the lid member.SOLUTION: A front part in an open part 2a of a musical instrument case 2 includes: a front lid 22 being a first member which is movably arranged in a cross direction of the musical instrument case 2; a rear lid 23 being a second member which is arranged so as to be movable in the cross direction at a rear part in the open part 2a of the musical instrument case 2; a connection member 24 which bendably connects the front lid 22 and the rear lid 23; and an inelastic reinforcing member 25 disposed between the front lid 22 and the rear lid 23. Thus, a gap between the front lid 22 and the rear lid 23 can satisfactorily be blocked by the reinforcing member 25, the plurality of connection members 24 can sufficiently be hidden and strength between the front lid 22 and the rear lid 23 can be secured by the reinforcing member 25.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a cover member for use in keyboard instruments, audio equipment, and the like, and to a keyboard instrument provided with the same. [Background technology]

[0002] For example, in the case of keyboard instruments, as described in Patent Document 1, a keyboard unit arranged inside an instrument case is exposed from an opening of the instrument case, and the keyboard unit is covered by a keyboard lid that can be opened and closed to close the opening of the instrument case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 57-30787

[0004] A keyboard cover for this type of keyboard instrument comprises a flat first cover member arranged at the front side of the open part of the instrument case so as to be movable in the front-to-rear direction of the instrument case, a flat second cover member arranged at the rear side of the open part of the instrument case so as to be movable in the front-to-rear direction of the instrument case, and a connecting member which folds and connects the first cover member and the second cover member.

[0005] In this case, the connecting member of the keyboard cover includes a connecting body disposed between the first cover member and the second cover member and attached to the undersides of the first cover member and the second cover member, and a bending portion that bendably closes the gap between the first cover member and the second cover member. In this type of connecting member, the connecting body and the bending portion are integrally formed from a flexible synthetic resin such as polypropylene.

[0006] As a result, when the first cover member and the second cover member are arranged side by side in a flat plate shape above the keyboard unit, this type of keyboard cover covers the top of the keyboard unit and blocks the open portion of the instrument case, and when the first cover member and the second cover member bend around the bending portion and move toward the rear side of the instrument case, they open the open portion of the instrument case to expose the keyboard unit. Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the keyboard covers of such keyboard instruments, the connecting body and the bent portion of the connecting member are formed from flexible synthetic resin, so although the bent portion can seal and hide the gap between the first cover member and the second cover member, there is a problem in that the bent portion cannot ensure strength between the first cover member and the second cover member.

[0008] An object of the present invention is to provide a cover member capable of ensuring strength, and a keyboard instrument including the cover member. [Means for solving the problem]

[0009] The present invention is a cover member characterized by comprising: a first member arranged at the front side of the open portion of the case so as to be movable in the front-to-rear direction of the case; a second member arranged at the rear side of the open portion of the case so as to be movable in the front-to-rear direction; a connecting member that foldably connects the first member and the second member; and an inelastic reinforcing member arranged between the first member and the second member. Effect of the Invention

[0010] According to the present invention, strength can be ensured. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view of an embodiment of the present invention applied to a keyboard instrument, showing the appearance of the instrument with the fallboard closed; FIG. [Diagram 2] 2 is an external perspective view of the keyboard instrument shown in FIG. 1 with the fallboard open; FIG. [Diagram 3] 2 is an enlarged cross-sectional view of the keyboard instrument shown in FIG. 1 taken along the line AA. [Figure 4] 3 is an enlarged cross-sectional view of the keyboard instrument shown in FIG. 2 taken along the line BB. [Diagram 5] 2 is an enlarged rear view of the keyboard instrument shown in FIG. 1 with a part of the fallboard omitted. FIG. [Figure 6] 6 is an enlarged cross-sectional view of the fallboard shown in FIG. 5, taken along the line CC; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment in which the present invention is applied to a keyboard instrument will be described with reference to Figs. 1 to 6. 1 and 2, this keyboard instrument includes an instrument case 2 in which a keyboard unit 1 is mounted, and a stand 3 that supports the instrument case 2. The instrument case 2 is formed in a generally horizontally elongated box shape with an open upper front portion corresponding to the keyboard unit 1.

[0013] 1 and 2, the stand 3 includes a pair of support legs 4 supporting both left and right sides of the underside of the instrument case 2, a rear plate 5 spanning between the rear ends of the pair of support legs 4 to support the rear of the underside of the instrument case 2, and a pedal support plate 6 located below the rear plate 5 and spanning between the lower parts of the pair of support legs 4. In this case, a plurality of foot pedals 7 are provided in the middle of the pedal support plate 6 in the left-right direction (longitudinal direction).

[0014] As shown in Figures 1 to 4, the instrument case 2 comprises a bottom plate 8 having a long, band-like shape extending in the left-right direction, a front plate 9 standing up at the front end of the bottom plate 8 (the left end in Figure 3), a back plate 10 standing up at the rear end of the bottom plate 8 (the right end in Figure 3), a pair of side plates 11 standing up on both left-right sides of the bottom plate 8 (both longitudinal sides in Figure 1), and a top plate 12 located on top of the pair of side plates 11 and the back plate 10.

[0015] In this case, as shown in Figures 1 to 4, the front panel 9 is provided with a height that is less than half the height of the rear panel 10, that is, about 1 / 3 the height of the rear panel 10. The pair of side panels 11 are provided with a height from their front ends (left ends in Figure 3) to approximately the middle part in the front-rear direction (left-right direction in Figure 3) that is approximately half the height of the rear panel 10. Also, the pair of side panels 11 are provided with a height from approximately the middle part in the front-rear direction (left-right direction in Figure 3) to their rear ends (right ends in Figure 3) that is the same height as the rear panel 10.

[0016] As shown in Figs. 1 to 4, the top plate 12 is disposed on the upper end of the back plate 10 while being bridged over the upper ends of the rear sides of the pair of side plates 11. The top plate 12 includes a front top plate 12a and a rear top plate 12b. In this case, the front top plate 12a is fixed onto the pair of side plates 11. A music stand 13 is provided on the front top plate 12a. The rear top plate 12b is rotatably attached to the upper end of the back plate 10 by a hinge 12c, and opens the rear side of the musical instrument case 2 so that it can be opened and closed.

[0017] 1 to 4, the musical instrument case 2 has a keyboard unit 1 disposed between the front portions of a pair of side panels 11, and the musical instrument case 2 is provided with an opening 2a that opens the keyboard unit 1 upward. The keyboard unit 1 includes a keyboard chassis 14 disposed on the bottom panel 8 of the musical instrument case 2, a plurality of keys 15 arranged in parallel on the keyboard chassis 14 in a state that allows them to rotate up and down, and a plurality of hammer members 16 that rotate in response to depression of each of the plurality of keys 15 to apply an action load to each of the plurality of keys 15.

[0018] 3 and 4, when the key 15 is in the initial state where it is not being pressed, the hammer member 16 abuts against a lower limit stopper 17 provided on the bottom plate 8 of the instrument case 2 located below the rear of the keyboard chassis 14, pushing the key 15 up to its initial position. When the hammer member 16 rotates by pressing the key 15, it abuts against an upper limit stopper 18 provided on the lower rear surface of the keyboard chassis 14 located above the bottom plate 8 of the instrument case 2, restricting the lower limit position of the key 15 when it is pressed.

[0019] As shown in Figures 3 and 4, the keyboard unit 1 is operated by pressing a number of keys 15 exposed upward from an open portion 2a of the musical instrument case 2. When each of the keys 15 is pressed, a switch section SW provided on the keyboard chassis 14 operates to output a switch signal. In this case, a console panel 19 is provided inside the musical instrument case 2 from the upper side located at the rear of the keyboard unit 1 toward the rear.

[0020] 1 to 4, the instrument case 2 is provided with a fallboard 20 that covers the upper side of the keyboard unit 1 and can be opened and closed by a fallboard guide portion 21 provided inside the instrument case 2. The fallboard 20 has a front fallboard 22 that is a first member elongated in the left-right direction, and a rear fallboard 23 that is a second member elongated in the left-right direction. As shown in FIG. 5, the front fallboard 22 and the rear fallboard 23 are connected by a plurality of connecting members 24 so that they can be folded, and a decorative reinforcing member 25 is provided between the front fallboard 22 and the rear fallboard 23.

[0021] 3 to 6, a front guide shaft 22a protruding toward each inner surface of the pair of side plates 11 is provided at the front end of the front lid 22 via front support legs 22b. Also, a rear guide shaft 23a protruding toward each inner surface of the pair of side plates 11 is provided at the front end of the rear lid 23 via rear support legs 23b. An arm connector 23c protruding toward the rear inside the musical instrument case 2 is attached to the rear end of the rear lid 23.

[0022] 3 and 4, when the keyboard cover 20 covers the upper side of the keyboard unit 1, the cover guide section 21 in the instrument case 2 arranges the front cover 22 and the rear cover 23 side by side in a substantially flat plate shape. When the keyboard cover 20 is stored in the rear side of the instrument case 2 with the keyboard unit 1 open upward, the cover guide section 21 folds the front cover 22 and the rear cover 23 by the connecting member 24, and causes the front cover 22 to be arranged under the front top plate 12a of the top plate 12, and the rear cover 23 to hang down close to the rear end of the keyboard unit 1.

[0023] That is, the lid guide section 21 has a guide rail section 26 and a guide arm section (not shown) as shown in Figures 3 and 4. The guide rail section 26 is provided on each inner surface of the pair of side panels 11, extending from the upper side of the front panel 9 to a location corresponding to the rear end of the front top panel 12a of the top panel 12, i.e., the lower side of the front end of the rear top panel 12b. The guide rail section 26 guides the front guide shaft 22a of the front lid 22 and the rear guide shaft 23a of the rear lid 23 of the keyboard lid 20.

[0024] 3 and 4, when the front cover 22 and the rear cover 23 cover the upper side of the keyboard unit 1, the guide rail section 26 supports the front guide shaft 22a of the front cover 22 at the front end portion of the guide rail section 26, and supports the rear guide shaft 23a of the rear cover 23 at a portion of the guide rail section 26 located above approximately the middle portion in the front-to-rear direction of the keyboard unit 1. As a result, the front cover 22 and the rear cover 23 are arranged side by side like a flat plate.

[0025] Furthermore, as shown in Figures 3 and 4, when the keyboard cover 20 is stored at the rear side of the instrument case 2 with the keyboard unit 1 open upward, this guide rail portion 26 supports the front guide shaft 22a of the front cover 22 at the guide rail portion 26 located below the front end of the top plate 12, i.e., the front end of the front top plate 12a, and supports the rear guide shaft 23a of the rear cover 23 at the rear end of the guide rail portion 26 located below the rear end of the front top plate 12a of the top plate 12, i.e., the front end of the rear top plate 12b.

[0026] As a result, as shown in Figures 3 and 4, when the keyboard cover 20 is stored at the rear side of the instrument case 2 with the keyboard unit 1 opened upward, this guide rail portion 26 is configured to position the front cover 22 below the front top plate 12a of the top plate 12, and to fold the rear cover 23 relative to the front cover 22 by the connecting member 24, so that the rear cover 23 hangs down close to the rear end of the keyboard unit 1.

[0027] 3 and 4, rear cover 23 is guided by a guide arm portion (not shown) so that arm connector 23c provided at the rear end portion approaches the rear end portion of keyboard unit 1 and hangs down. That is, one end portion of the guide arm portion is rotatably attached to arm connector 23c of rear cover 23, and the other end portion is rotatably attached to arm support portion 27 provided at the rear end portion of keyboard chassis 14.

[0028] For this reason, as shown in Figures 3 and 4, the rear cover 23 is configured so that the guide arm portion (not shown) rotates and moves in the vertical direction around the arm support portion 27 of the keyboard chassis 14, causing the arm connection portion 23c at the rear end of the rear cover 23 to move in the vertical direction, thereby allowing the rear end of the rear cover 23 to move in the vertical direction between an upper portion at approximately the same height as the guide rail portion 26 and the lower rear side of the keyboard unit 1.

[0029] As a result, when the front lid 22 and rear lid 23 of the keyboard lid 20 cover the upper side of the keyboard unit 1 and block the open portion 2a of the instrument case 2, as shown in Figure 3, the guide arm portion (not shown) rotates counterclockwise around the arm support portion 27, pushing up the arm connection portion 23c provided at the rear end of the rear lid 23 to approximately the same height as the guide rail portion 26, and this pushed-up arm connection portion 23c is held by the holding portion 28 provided on the top of the keyboard chassis 14, thereby arranging the front lid 22 and rear lid 23 side by side in a flat plate shape.

[0030] In addition, as shown in Figure 4, when the keyboard cover 20 is stored at the rear side inside the instrument case 2 with the keyboard unit 1 open upward, the guide arm portion (not shown) rotates clockwise around the arm support portion 27 of the keyboard chassis 14 and tilts downward to the rear, thereby supporting the arm connection portion 23c provided at the rear end of the rear cover 23 at the lower rear side of the keyboard unit 1 and storing the front cover 22 and rear cover 23 in a folded state inside the instrument case 2.

[0031] 5, a plurality of connecting members 24 that connect the front cover 22 and the rear cover 23 in a foldable manner are attached to the fallboard 20 by a plurality of screws 24b, straddling the underside of the front cover 22 and the underside of the rear cover 23. Each of the connecting members 24 is a hinge. The connecting members 24 are provided at three locations, on both sides and in the middle, in the direction along the space between the front cover 22 and the rear cover 23, with their connecting rotation parts 24a disposed between the front cover 22 and the rear cover 23.

[0032] 2, 5, and 6, a decorative, inelastic reinforcing member 25 is disposed between the front lid 22 and the rear lid 23 over the entire area between the front lid 22 and the rear lid 23. The reinforcing member 25 is decorative in a color such as gold or silver, and is formed in a substantially square rod shape from a highly rigid metal. The reinforcing member 25 is provided with a reinforcing attachment portion 25a that is attached to the underside of the rear of the front lid 22.

[0033] 5 and 6, the reinforcement mounting portion 25a is attached to the underside of the rear side of the front lid 22 with a plurality of screws 25b. In this case, the reinforcement mounting portion 25a is provided with notches 25c corresponding to the plurality of connecting members 24 provided on the underside of the rear side of the front lid 22. As a result, the reinforcement mounting portion 25a is attached to the underside of the rear side of the front lid 22 with the plurality of connecting members 24 corresponding to each of the notches 25c.

[0034] In this case, the rear end surface of the front cover 22 and the front end surface of the rear cover 23, which are the opposing surfaces of the front cover 22 and the rear cover 23, are formed as cover inclined surfaces 30a, 30b, which are first inclined surfaces whose upper portions are inclined toward the rear of the musical instrument case 2 more than their lower portions, as shown in Fig. 6. Also, the front and rear surfaces of the reinforcing member 25 are formed as reinforcing inclined surfaces 31a, 31b, which are second inclined surfaces inclined at the same angle as the cover inclined surfaces 30a, 30b of the rear end surface of the front cover 22 and the front end surface of the rear cover 23. As a result, the cross-sectional shape of the reinforcing member 25 is formed to be substantially a parallelogram.

[0035] For this reason, as shown in Figures 2, 3 and 6, when the front lid 22 and the rear lid 23 are arranged side by side in a flat plate shape and cover the upper part of the keyboard unit 1 to close the open portion 2a of the instrument case 2, the lid inclined surface 30a on the rear end face of the front lid 22 and the reinforcing inclined surface 31a on the front face of the reinforcing member 25 correspond and come into close contact with each other, and the lid inclined surface 30b on the front end face of the rear lid 23 and the reinforcing inclined surface 31b on the rear face of the reinforcing member 25 correspond and come into close contact with each other.

[0036] As a result, as shown in Figures 2, 3 and 6, the reinforcing member 25 has a lid inclined surface 30a on the rear end surface of the front lid 22 and a reinforcing inclined surface 31a on the front surface of the reinforcing member 25 that correspond and abut closely to each other, and also has a lid inclined surface 30b on the front end surface of the rear lid 23 and a reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 that correspond and abut closely to each other. As a result, even if a load is applied to the front lid 22 and the rear lid 23, the reinforcing inclined surfaces 31a, 31b of the reinforcing member 25, i.e., the cross-sectional shape of the reinforcing member 25 is approximately a parallelogram, so that the load applied to the front lid 22 and the rear lid 23 is reliably received, and the front lid 22 and the rear lid 23 are held in place well.

[0037] As shown in FIG. 4, when the rear lid 23 is folded relative to the front lid 22 around the multiple connecting members 24 and the front lid 22 and rear lid 23 are stored at the rear side of the instrument case 2, the reinforcing inclined surface 31a on the front side of the reinforcing member 25 and the lid inclined surface 30a on the rear end surface of the front lid 22 are in close contact with each other, and the lid inclined surface 30b on the front end surface of the rear lid 23 gradually opens away from the reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 toward the rear of the instrument case 2.

[0038] For this reason, even if the reinforcing member 25 opens so that the lid inclined surface 30b on the front end surface of the rear lid 23 gradually moves away from the reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 toward the rear of the instrument case 2, as shown in Figure 4, this opened reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 will not be visible from diagonally above on the front side of the instrument case 2.

[0039] As a result, as shown in Figures 2, 3 and 6, when the front lid 22 and the rear lid 23 are arranged in a flat plate shape to cover the open portion 2a of the instrument case 2, the lid inclined surface 30a on the rear end face of the front lid 22 and the reinforcing inclined surface 31a on the front face of the reinforcing member 25 correspond and fit closely to each other, and the lid inclined surface 30b on the front end face of the rear lid 23 and the reinforcing inclined surface 31b on the rear face of the reinforcing member 25 correspond and fit closely to each other, thereby closing the gap between the front lid 22 and the rear lid 23.

[0040] 4, when the rear lid 23 is folded relative to the front lid 22 around the multiple connecting members 24 to open the open section 2a of the instrument case 2, the reinforcing inclined surface 31a on the front side of the reinforcing member 25 and the lid inclined surface 30a on the rear end surface of the front lid 22 are in close contact with each other, and the lid inclined surface 30b on the front end surface of the rear lid 23 opens gradually away from the reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 towards the rear of the instrument case 2, and in this state the keyboard lid 20 is stored at the rear side within the instrument case 2. For this reason, even if the reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 is opened and exposed, the keyboard lid 20 cannot be seen from diagonally above the front side of the instrument case 2.

[0041] Next, the operation of such a keyboard instrument will be described. When playing this keyboard instrument, first open the fallboard 20 and open the keyboard unit 1 upward. At this time, the front end of the front cover 22 is lifted and the front cover 22 is moved backward. Then, the front guide shaft 22a of the front cover 22 and the rear guide shaft 23a of the rear cover 23 move backward along the guide rail portion 26.

[0042] As a result, the rear cover 23 gradually bends relative to the front cover 22, centered on the connecting member 24, while the arm connecting portion 23c at the rear end of the rear cover 23 rotates clockwise around the arm support portion 27 of the keyboard chassis 14 by the guide arm portion (not shown), moving the rear cover 23 toward the lower rear of the keyboard unit 1.

[0043] At this time, the rear lid 23 gradually bends relative to the front lid 22 around the connecting member 24, while the front lid 22 moves toward the rear inside the instrument case 2, and the rear part of the rear lid 23 moves toward the lower rear side of the keyboard unit 1. In this case, with the front surface of the reinforcing member 25 provided between the front lid 22 and the rear lid 23 in close contact with the rear end surface of the front lid 22, the front end surface of the rear lid 23 gradually moves away from the rear surface of the reinforcing member 25, so that the rear surface of the reinforcing member 25 is exposed toward the rear of the instrument case 2.

[0044] In other words, since the reinforcing mounting portion 25a of the reinforcing member 25 is attached to the underside of the rear side of the front lid 22, when the rear lid 23 bends relative to the front lid 22 around the connecting member 24, the reinforcing inclined surface 31a on the front surface of the reinforcing member 25 and the lid inclined surface 30a on the rear end surface of the front lid 22 are in close contact with each other, and the lid inclined surface 30b on the front end surface of the rear lid 23 gradually opens away from the reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 toward the rear of the instrument case 2.

[0045] At this time, the rear part of the front lid 22 moves inside the instrument case 2, and the front lid 22 moves to the underside of the front top plate 12a of the top plate 12, so that even if the reinforcing slope 31b on the rear face of the reinforcing member 25 moves away from the lid slope 30b on the front end face of the rear lid 23 and is exposed toward the rear of the instrument case 2, the reinforcing slope 31b on the rear face of the reinforcing member 25 attached in close contact with the rear end face of the front lid 22 and the lid slope 30b on the front end face of the rear lid 23 cannot be seen from diagonally above the front side outside the instrument case 2. This improves the appearance and design.

[0046] Then, the front guide shaft 22a of the front cover 22 is disposed at the guide rail portion 26 located below the front end of the front top plate 12a of the top plate 12, and the rear guide shaft 23a of the rear cover 23 is disposed at the rear end of the front top plate 12a of the top plate 12, that is, the rear end of the guide rail portion 26 located below the front end of the rear top plate 12b of the top plate 12. In addition, the arm connecting portion 23c provided at the rear end of the rear cover 23 is disposed below the rear of the keyboard unit 1.

[0047] Then, the front cover 22 is placed substantially parallel to the underside of the top plate 12, and the rear cover 23 is folded relative to the front cover 22 by the connecting member 24 and hangs down close to the rear end of the keyboard unit 1. This opens the keyboard unit 1 upward and exposes the multiple keys 15 upward, making it possible to play. Therefore, when the multiple keys 15 of the keyboard unit 1 are pressed to play, musical tones corresponding to the key presses are generated from a speaker (not shown). The generated musical tones are then emitted satisfactorily to the outside of the instrument case 2.

[0048] On the other hand, when not playing, the fallboard 20 is closed to cover the keyboard unit 1. At this time, when the front end of the front lid 22 of the fallboard 20 is pulled out toward the front of the instrument case 2, the front guide shaft 22a of the front lid 22 and the rear guide shaft 23a of the rear lid 23 move forward along the guide rail portion 26. In response to this, the arm connecting portion 23c at the rear end of the rear lid 23 rotates counterclockwise around the arm support portion 27 by the guide arm portion (not shown) and is pushed up.

[0049] At this time, the bending of the front cover 22 and the rear cover 23 caused by the connecting member 24 is gradually released, and the arm connecting part 23c at the rear end of the rear cover 23 is pushed up by the guide arm part (not shown) so that it is at approximately the same height as the guide rail part 26. This pushed-up arm connecting part 23c is held by a holding part 28 provided on the rear end of the keyboard chassis 14.

[0050] Then, when the front guide shaft 22a of the front lid 22 is disposed at the front end of the guide rail section 26 located on the front panel 9 of the musical instrument case 2, the rear guide shaft 23a of the rear lid 23 is disposed at a location on the guide rail section 26 corresponding to approximately the middle part of the keyboard unit 1 in the front-to-rear direction, and the arm connecting section 23c provided at the rear end of the rear lid 23 is disposed at approximately the same height as the guide rail section 26, the front lid 22 and the rear lid 23 are disposed side by side like flat plates. As a result, the front lid 22 and the rear lid 23 cover the keyboard unit 1 and close the open section 2a of the musical instrument case 2.

[0051] In this case, only the upper surface of the reinforcing member 25 provided between the front cover 22 and the rear cover 23 is exposed to the outside of the musical instrument case 2. That is, since the front cover 22 and the rear cover 23 are arranged side by side like flat plates, the cover inclined surface 30a on the rear end surface of the front cover 22 and the reinforcing inclined surface 31a on the front surface of the reinforcing member 25 are in close contact with each other, and the cover inclined surface 30b on the front end surface of the rear cover 23 and the reinforcing inclined surface 31b on the rear surface of the reinforcing member 25 are in close contact with each other. As a result, the gap between the front cover 22 and the rear cover 23 is closed by the reinforcing member 25, and even if a load is applied to the front cover 22 and the rear cover 23, the reinforcing inclined surfaces 31a and 31b of the reinforcing member 25 reliably receive the load applied to the front cover 22 and the rear cover 23, thereby holding the front cover 22 and the rear cover 23.

[0052] In this state, the reinforcing member 25 is disposed over the entire area between the front lid 22 and the rear lid 23, so that the reinforcing member 25 effectively covers the entire gap between the front lid 22 and the rear lid 23, and since the reinforcing member 25 has a decorative appearance in a color such as gold or silver and hides the multiple connecting members 24, the reinforcing member 25 enhances the decorativeness and ensures the strength between the front lid 22 and the rear lid 23. As a result, the reinforcing member 25 improves the appearance and design of the keyboard cover 20.

[0053] In this way, with this keyboard instrument keyboard cover 20, strength can be ensured by comprising: a front lid 22 which is a first member arranged at the front side of the open portion 2a of the instrument case 2 so as to be movable in the front-to-rear direction of the instrument case 2; a rear lid 23 which is a second member arranged at the rear side of the open portion 2a of the instrument case 2 so as to be movable in the front-to-rear direction; a connecting member 24 which connects the front lid 22 and the rear lid 23 in a foldable manner; and an inelastic reinforcing member 25 which is arranged between the front lid 22 and the rear lid 23.

[0054] In other words, in the keyboard cover 20 of this keyboard instrument, the reinforcing member 25 is disposed between the front cover 22 and the rear cover 23, so that the gap between the front cover 22 and the rear cover 23 can be effectively sealed and the multiple connecting members 24 can be effectively hidden, and the reinforcing member 25 can ensure the strength between the front cover 22 and the rear cover 23.

[0055] In this case, in the keyboard cover 20 of this keyboard instrument, the reinforcing member 25 has decorative properties and hides the multiple connecting members 24, thereby enabling the reinforcing member 25 to enhance the decorativeness of the entire keyboard cover 20 and improve the appearance and design of the entire keyboard cover 20. In addition, when the reinforcing member 25 is positioned between the front cover 22 and the rear cover 23, the reinforcing member 25 serves as an accent for the entire keyboard cover 20, thereby also improving the appearance and design of the entire keyboard cover 20.

[0056] Furthermore, in the keyboard cover 20 of this keyboard instrument, the reinforcing member 25 is positioned over the entire area between the front cover 22, which is the first member, and the rear cover 23, which is the second member, so that the reinforcing member 25 can reliably and effectively seal the gap between the front cover 22 and the rear cover 23 over the entire area and can reliably and effectively hide the multiple connecting members 24. As a result, the decorative reinforcing member 25 can enhance the decorativeness such as color, and the reinforcing member 25 can ensure the strength between the front cover 22 and the rear cover 23.

[0057] Furthermore, in the keyboard cover 20 of this keyboard instrument, the reinforcing member 25 is provided with a reinforcing mounting portion 25a, which is a mounting portion that is attached to the front cover 22 of the front cover 22 and rear cover 23, except for the portion corresponding to the connecting member 24.Therefore, with the reinforcing member 25 positioned between the front cover 22 and the rear cover 23, the reinforcing member 25 can be attached to the front cover 22 by the reinforcing mounting portion 25a, thereby allowing the reinforcing member 25 to be securely and satisfactorily fixed to the front cover 22.

[0058] In this case, in the keyboard cover 20 of this keyboard instrument, the reinforcing member 25, which is the mounting portion thereof, is attached to the underside of the front cover 22 which is located at the front side of the open portion 2a of the instrument case 2, so that the reinforcing member 25 can be attached to the front cover 22 by the reinforcing member mounting portion 25a with the reinforcing member 25 positioned between the front cover 22 and the rear cover 23. Therefore, when the rear cover 23 is folded relative to the front cover 22 around the connecting member 24, the front end face of the rear cover 23 can be opened by gradually moving away from the rear face of the reinforcing member 25 toward the rear of the instrument case 2 with the front face of the reinforcing member 25 kept in close contact with the rear end face of the front cover 22.

[0059] Therefore, in the keyboard cover 20 of this keyboard instrument, when the front cover 22 and the rear cover 23 move toward the rear of the instrument case 2 and are folded around the connecting member 24, the front end face of the rear cover 23 can be gradually moved away from the rear face of the reinforcing member 25 toward the rear of the instrument case 2 and opened. Therefore, even if the rear face of the reinforcing member 25 opens and is exposed from the front end face of the rear cover 23, the exposed rear face of the reinforcing member 25 and the front end face of the rear cover 23 can be made not to be visible from outside the instrument case 2, which also improves the appearance and design.

[0060] In addition, in the keyboard cover 20 of this keyboard instrument, the rear end surface of the front cover 22 and the front end surface of the rear cover 23, which face each other, are each formed as first inclined surfaces, i.e., cover inclined surfaces 30a, 30b, with the upper portion inclined toward the rear side of the instrument case 2 more than the lower portion, and the front and rear surfaces of the reinforcing member 25 are each formed as reinforcing inclined surfaces 31a, 31b, which are second inclined surfaces inclined at the same angle as the cover inclined surfaces 30a, 30b between the rear end surface of the front cover 22 and the front end surface of the rear cover 23.

[0061] As a result, in the keyboard lid 20 of this keyboard instrument, even if a load is applied to the front lid 22 and the rear lid 23, the reinforcing inclined surfaces 31a, 31b of the reinforcing member 25 can reliably receive the load applied to the front lid 22 and the rear lid 23, thereby allowing the front lid 22 and the rear lid 23 to be held in place.In addition, when the keyboard lid 20, in which the front lid 22 and the rear lid 23 are arranged in a flat plate shape, is viewed from directly above, the reinforcing member 25 can reliably and effectively block and hide the gap between the front lid 22 and the rear lid 23 so that the inside of the instrument case 2 cannot be seen through the gap between the front lid 22 and the rear lid 23.

[0062] In other words, with the keyboard lid 20 of this keyboard instrument, when the front lid 22 and rear lid 23 are pulled out to the front of the instrument case 2 and arranged in a flat plate shape to cover the open portion 2a of the instrument case 2, the lid inclined surface 30a on the rear end face of the front lid 22 and the reinforcing inclined surface 31a on the front face of the reinforcing member 25 can be brought into close contact with each other, and the lid inclined surface 30b on the front end face of the rear lid 23 and the reinforcing inclined surface 31b on the rear face of the reinforcing member 25 can be brought into close contact with each other.

[0063] As a result, in the keyboard lid 20 of this keyboard instrument, even if a load is applied to the front lid 22 and the rear lid 23, the reinforcing inclined surfaces 31a, 31b of the reinforcing member 25 can reliably receive the load applied to the front lid 22 and the rear lid 23, thereby holding the front lid 22 and the rear lid 23 in good condition.In addition, when the keyboard lid 20, in which the front lid 22 and the rear lid 23 are arranged in a flat plate shape, is viewed from directly above, the reinforcing member 25 can reliably and effectively seal the gap between the front lid 22 and the rear lid 23 so that the inside of the instrument case 2 cannot be seen through the gap between the front lid 22 and the rear lid 23.

[0064] In addition, in the keyboard lid 20 of this keyboard instrument, as the rear lid 23 gradually bends relative to the front lid 22 around the connecting member 24, and the front lid 22 and the rear lid 23 move toward the rear within the instrument case 2 to open the open portion 2a of the instrument case 2, the front end face of the rear lid 23 moves away from the rear face of the reinforcing member 25 toward the rear of the instrument case 2, so that the front end face of the rear lid 23 and the rear face of the reinforcing member 25 can be opened toward the rear of the instrument case 2.

[0065] In other words, in the keyboard lid 20 of this keyboard instrument, the reinforcing mounting portion 25a of the reinforcing member 25 is attached to the underside of the rear end portion of the front lid 22, so that when the rear lid 23 bends relative to the front lid 22 around the connecting member 24, the reinforcing inclined surface 31a on the rear surface of the reinforcing member 25 and the lid inclined surface 30a on the rear end surface of the front lid 22 are kept in close contact with each other, and the lid inclined surface 30a on the front end surface of the rear lid 23 can be opened by gradually moving away from the reinforcing inclined surface 31a on the rear surface of the reinforcing member 25 toward the rear of the instrument case 2.

[0066] Therefore, in the keyboard cover 20 of this keyboard instrument, when the rear cover 23 bends relative to the front cover 22 around the connecting member 24 and the front cover 22 and the rear cover 23 move toward the rear of the instrument case 2, even if the reinforcing inclined surface 31a on the rear face of the reinforcing member 25 becomes exposed away from the cover inclined surface 30a on the front end face of the rear cover 23, the exposed rear face of the reinforcing member 25 faces the rear of the instrument case 2, so it can be made not to be seen from outside the instrument case 2, which also improves the appearance and design.

[0067] Furthermore, in the keyboard lid 20 of this keyboard instrument, the cross-sectional shape of the reinforcing member 25 is formed into an approximately parallelogram, so that when the front lid 22 and the rear lid 23 cover the open portion 2a of the instrument case 2, the lid inclined surface 30a on the rear end face of the front lid 22 and the reinforcing inclined surface 31a on the front face of the reinforcing member 25 can be brought into close contact with each other, and the lid inclined surface 30b on the front end face of the rear lid 23 and the reinforcing inclined surface 31b on the rear face of the reinforcing member 25 can be brought into close contact with each other. This also allows the load applied to the front lid 22 and the rear lid 23 to be reliably received by the reinforcing inclined surfaces 31a, 31b of the reinforcing member 25, and the front lid 22 and the rear lid 23 can be well held by the reinforcing inclined surfaces 31a, 31b of the reinforcing member 25.

[0068] Furthermore, in the keyboard cover 20 of this keyboard instrument, the front cover 22 and the rear cover 23 are arranged in a flat plate shape to close the open portion 2a of the instrument case 2, and when the rear cover 23 is folded relative to the front cover 22 around the connecting member 24, the open portion 2a of the instrument case 2 is opened, so that the front cover 22 and the rear cover 23 can reliably and satisfactorily close the open portion 2a of the instrument case 2, while allowing the open portion 2a of the instrument case 2 to be opened smoothly and satisfactorily.

[0069] In the above-described embodiment, the reinforcing member 25 is described as having a reinforcing mounting portion 25a that is attached to the underside of the front lid 22. However, the present invention is not limited to this. For example, the reinforcing member 25 may be provided with a reinforcing mounting portion that is attached to the underside of the rear lid 23.

[0070] In addition, in the above-described embodiment, the front lid 22 and the rear lid 23, which face each other, are formed as lid inclined surfaces 30a, 30b with the upper part inclined toward the rear of the instrument case 2 more than the lower part, and the front and rear surfaces of the reinforcing member 25 are formed as reinforcing inclined surfaces 31a, 31b inclined at the same angle as the lid inclined surfaces 30a, 30b, respectively. However, the present invention is not limited to this, and the inclination may be in the opposite direction.

[0071] In other words, the rear end surface of front lid 22 and the front end surface of rear lid 23, where front lid 22 and rear lid 23 face each other, may be formed as lid inclined portions whose upper portion is inclined toward the front of instrument case 2 more than the lower portion, and the front and rear surfaces of reinforcing member 25 may be formed as reinforcing inclined surfaces that are inclined at the same angle as the lid inclined surfaces.Furthermore, it is not necessarily necessary for the rear end surface of front lid 22, the front end surface of rear lid 23, and the front and rear surfaces of reinforcing member 25 to be formed as inclined surfaces, and they may be formed as vertical surfaces.

[0072] Furthermore, in the above embodiment, the present invention has been described as being applied to a keyboard instrument, but is not limited to this and can also be applied to electronic devices such as audio equipment. [Explanation of symbols]

[0073] 1 Keyboard unit 2. Instrument cases 2a Open area 3. Stand 8 Bottom plate 9 Front Panel 10 Back plate 11 Side Panel 12 Tabletop 12a Front top plate 12b Rear top plate 12c Hinge 14 Key Chassis 15 keys 16 Hammer Parts 17 Lower limit stopper 18 Upper limit stopper 19 Console Panel 20 Keyboard lid 21 Lid guide 22 Front lid 22a Front guide shaft 22b Front support leg 23 Rear lid 23a Rear guide shaft 23b Rear support leg 23c Arm connection part 24 Connecting members 24a Connecting rotating part 24b, 25b screws 25 Reinforcement members 25a Reinforcement mounting part 25c Notch 26 Guide rail section 27 Arm support 28 Holding part 30a, 30b Lid slope 31a, 31b Reinforced slope

Claims

1. A first member is disposed on a front side of the opening of the case so as to be movable in a front-rear direction of the case; a second member disposed on a rear side portion of the opening of the case so as to be movable in the front-rear direction; A connecting member that connects the first member and the second member in a bendable manner; an inelastic reinforcing member disposed between the first member and the second member; A cover member comprising:

2. The cover member according to claim 1, The reinforcing member has a decorative effect and hides the connecting member. A cover member characterized by:

3. The cover member according to claim 1, The reinforcing member is disposed over the entire area between the first member and the second member. A cover member characterized by:

4. The cover member according to claim 1, The reinforcing member includes an attachment portion that is attached to either the first member or the second member, except for a portion corresponding to the connecting member. A cover member characterized by:

5. The cover member according to claim 4, The mounting portion of the reinforcing member is attached to a lower surface of the first member that is disposed in the front portion of the opening of the case. A cover member characterized by:

6. The cover member according to claim 1, a rear end surface of the first member and a front end surface of the second member, where the first member and the second member face each other, are each formed into a first inclined surface; Each of the front and rear surfaces of the reinforcing member is formed into a second inclined surface that is inclined at the same angle as the first inclined surface between the rear end surface of the first member and the front end surface of the second member. A cover member characterized by:

7. The cover member according to claim 1, The reinforcing member has a cross-sectional shape that is substantially a parallelogram. A cover member characterized by:

8. The cover member according to claim 1, The first member and the second member close the opening of the case when arranged in a flat plate shape, and open the opening of the case when the second member is bent relative to the first member around the connecting member. A cover member characterized by:

9. A keyboard instrument comprising the cover member according to claim 1.

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