Music score display device

Abstract

The invention discloses a music score display device which comprises a horizontal first supporting plate, a pair of vertical supporting pipes are arranged on the horizontal first supporting plate, a pair of lifting pipes are arranged in the supporting pipes in a synchronous lifting mode, and supporting rods coaxial with the lifting pipes are rotationally arranged in the lifting pipes through threaded structures; the top ends of the pair of lifting pipes are connected through a horizontal first connecting plate, a pair of vertical display plates are symmetrically hinged to the edge of the first connecting plate, and music paper is detachably arranged on the display plates. The height of music paper can be flexibly adjusted, and the use requirements of different display heights of music scores can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a music score display device. Background Art

[0002] Musical notation is a method of recording music using symbols, either printed or handwritten. Different cultures and regions have developed different musical notation methods. Musical notation can be divided into two categories: recording pitch and recording fingering. Five-line notation, simplified notation, and braille notation are all musical notations that record pitch. Six-line notation for guitar and reduced notation for guqin are all musical notations that record fingering. During the use of musical notation, it is necessary to fix the musical notation with a display stand so that users can browse the information on the musical notation. For example, the utility model patent with announcement number CN214855106U discloses a musical notation display device with a splicing structure for music teaching. Although it can display multiple musical notation papers at the same time, the musical notation display height cannot be adjusted. Summary of the invention

[0003] The present invention provides a music score display device, which directly or indirectly drives a first connecting plate, a display plate and music paper to rise and fall through a pair of synchronously rising and falling lifting tubes, so as to achieve the purpose of adjusting the display height of the music score on the music paper.

[0004] In order to achieve these purposes and other advantages according to the present invention, a music score display device is provided, comprising: A first horizontal support plate is provided with a pair of vertical support tubes, a pair of lifting tubes are synchronously lifted and lowered in the pair of support tubes, support rods coaxial with the lifting tubes are rotatably provided in the lifting tubes through a threaded structure, the top ends of the pair of lifting tubes are connected through a first horizontal connecting plate, a pair of vertical display boards are symmetrically hinged on the edges of the first connecting plate, and music sheets are detachably provided on the display boards.

[0005] Preferably, in the music score display device, a pair of first limit plates distributed up and down are provided at the bottom of the support tube, the bottom end of the support rod passes through the pair of first limit plates and is rotatably connected to each first limit plate, a synchronous pulley is fixedly sleeved on the support rod between the pair of first limit plates, a first connecting hole corresponding to the position of the synchronous pulley is provided on the side wall of the support tube, and a synchronous belt passing through the first connecting hole is sleeved on the two synchronous pulleys, and the bottom end of one of the support rods is connected to the output shaft of the first motor located at the bottom of the corresponding support tube.

[0006] Preferably, in the music score display device, the first support plate is in the shape of a rectangular parallelepiped, a pair of support tubes are distributed in the length direction of the first support plate, and the distance between the two support tubes is greater than the width of the first support plate, a rotating block rotatably connected to the first support plate is connected to the bottom of the pair of support tubes, a limit block is provided on the side wall of the support tube, a vertical first adjustment hole is provided on the limit block, a vertical adjustment rod is provided at the first adjustment hole for lifting, a plurality of first limit holes distributed vertically and horizontally are provided on the adjustment rod, a horizontal second limit hole is provided on the limit block, limit rods are inserted into the corresponding second limit holes and the first limit holes, and a roller is provided at the bottom of the adjustment rod.

[0007] Preferably, in the music score display device, a vertical second limit plate is provided on the first support plate, a horizontal first limit slot is provided at the bottom of the limit block, the top of the second limit plate is slidably inserted in the first limit slot, and a third limit hole corresponding to and horizontal to the second limit hole is provided on the second limit plate, and the limit rod is inserted in the third limit hole.

[0008] Preferably, in the sheet music display device, the top end of the display board is hinged to the first connecting plate, and at the bottom of the first connecting plate, a pair of support frames arranged side by side are provided between the pair of display boards, and the support frames are provided with telescopic cylinders that rotate up and down on a vertical plane, and the telescopic ends of the telescopic cylinders are hinged to the inner side surfaces of the display boards corresponding thereto, and a limiting member is provided on the support frame for lifting and lowering, and the limiting member abuts against the top of the non-telescopic end of the telescopic cylinder.

[0009] Preferably, in the music score display device, the support frame includes a pair of vertical second support plates, the telescopic cylinder is rotatably arranged between the pair of second support plates, a plurality of pairs of vertically distributed limit notches are arranged on the pair of second support plates, the limit member is L-shaped, the horizontal portion of the limit member is inserted into one of the limit notches, and the vertical portion of the limit member abuts against the top of the non-telescopic end of the telescopic cylinder.

[0010] Preferably, in the music score display device, a pair of support shafts are provided on opposite surfaces of a pair of second support plates, a support tube rotatably connected thereto is provided between the pair of support shafts, the non-telescopic end of the telescopic cylinder is provided in the support tube, and the vertical portion of the limit member abuts against the support tube.

[0011] Preferably, in the sheet music display device, a plurality of second connecting plates are arranged on the top of the display board, and when a pair of display boards are horizontal, the second connecting plates opposite to each other on the pair of display boards are detachably connected via connecting pieces.

[0012] Preferably, in the music score display device, the display board is provided with a pair of horizontal long strip movable holes distributed up and down, two pairs of connecting frames are movably provided at the pair of movable holes, connecting rods perpendicular to the movable holes are rotatably provided on the connecting frames, and reels coaxial with the connecting rods are detachably provided between the pairs of connecting rods of each pair of connecting frames, and the music score paper is rolled up on the reels.

[0013] Preferably, in the music score display device, the connecting frame includes: a slide plate, which is parallel to the moving hole and movably inserted in the moving hole, both ends of the slide plate extend out of the moving hole and are fixedly provided with an inner limit plate and an outer limit plate perpendicular to the slide plate, the inner limit plate and the outer limit plate are both in sliding contact with the display board, the outer limit plate is provided with a first positioning hole, and the display board is provided with a plurality of second positioning holes distributed along the moving trajectory of the first positioning hole, and positioning rods are inserted into the corresponding first positioning holes and second positioning holes.

[0014] The present invention at least includes the following beneficial effects: a pair of vertical support tubes are arranged on the horizontal first support plate of the present invention, a pair of lifting tubes are arranged in the pair of support tubes for synchronous lifting, a support rod coaxial with the lifting tubes is rotatably arranged in the lifting tubes through a threaded structure, the top ends of the pair of lifting tubes are connected through a horizontal first connecting plate, a pair of vertical display boards are symmetrically hinged on the edges of the first connecting plate, and music paper is detachably arranged on the display boards, when the two support rods rotate synchronously, under the limiting effect of the support tubes and the first connecting plate, the two lifting tubes are lifted and lowered along their corresponding support rods and support tubes, thereby directly or indirectly driving the first connecting plate, the display board, and the music paper to rise and fall, flexibly adjusting the height of the music paper and the music display height, meeting the use requirements of different music display heights, and improving the practicality of the device.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of a music score display device in one of the technical solutions of the present invention; Figure 2 It is a schematic diagram of the side structure of a music score display device in one of the technical solutions of the present invention; Figure 3 It is a front view schematic diagram of the position relationship between the first connecting plate and the telescopic cylinder in one of the technical solutions of the present invention; Figure 4 It is a side view schematic diagram of the position relationship between the display board and the telescopic cylinder in one of the technical solutions of the present invention; Among them, 1-support tube, 2-first connecting plate, 3-second connecting plate, 4-display board, 5-movable hole, 6-connecting frame, 7-connecting rod, 8-music paper, 9-second support plate, 10-second limit plate, 11-synchronous pulley, 12-second motor, 13-synchronous belt, 14-rotating block, 15-first support plate, 16-first limit plate, 17-support rod, 18-first motor, 19-adjusting rod, 20-roller, 21-limiting block, 22-limiting rod, 23-limiting member, 24-support tube, 25-inner limit plate, 26-slide plate, 27-outer limit plate, 28-telescopic cylinder, 29-limiting notch, 31-support shaft, 32-reel. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0020] like Figure 1 , Figure 2 As shown, the present invention provides a music score display device, comprising: A first horizontal support plate 15 is provided with a pair of vertical support tubes 1, a pair of lifting tubes are synchronously lifted and lowered in the pair of support tubes 1, a support rod 17 coaxial with the lifting tubes is rotatably provided in the lifting tubes through a threaded structure, the top ends of the pair of lifting tubes are connected through a first horizontal connecting plate 2, a pair of vertical display boards 4 are symmetrically hinged on the edges of the first connecting plate 2, and music paper 8 is detachably provided on the display boards 4.

[0021] The music score display device provided by the technical solution mainly includes a first support plate 15, which is horizontally arranged on the ground. A pair of vertical support tubes 1 are arranged on the first support plate 15. A lifting tube coaxial with the support tube 1 is arranged in each support tube 1, and the two lifting tubes are lifted and lowered synchronously. A support rod 17 coaxial with the support tube 1 is rotatably arranged in the lifting tube. The support rod 17 is a threaded rod. An internal thread matching the external thread of the threaded rod is arranged on the inner wall of the lifting tube. The top ends of the pair of lifting tubes are connected with a first connecting plate 2 at the same level. When the support rod 17 rotates, the lifting tube is lifted and lowered along the support rod 17 and the support tube 1 under the limiting effect of the support tube 1 and the first connecting plate 2. A pair of vertical display boards 4 are hinged on the edge of the first connecting plate 2. Music paper 8 with music score is detachably arranged on the display board 4. The music paper 8 has music score written on it. The pair of display boards 4 are symmetrically arranged relative to the first connecting plate 2, and two music scores can be displayed at the same time. The lifting and lowering of the lifting and lowering tube drives the first connecting plate 2 to rise and fall, and then drives the music paper 8 to rise and fall.

[0022] The method of using the music score display device provided by the present technical solution is as follows: when in use, the two support rods 17 are rotated synchronously, and under the limiting effect of the support tube 1 and the first connecting plate 2, the two lifting tubes are lifted and lowered synchronously along their corresponding support rods 17 and the support tube 1, thereby directly or indirectly driving the first connecting plate 2, the display board 4, and the music paper 8 to be lifted and lowered, thereby changing the display height of the music score.

[0023] The present invention includes at least the following beneficial effects: a pair of vertical support tubes 1 are arranged on the horizontal first support plate 15, a pair of lifting tubes are arranged in the pair of support tubes 1 for synchronous lifting, a support rod 17 coaxial with the lifting tube is rotatably arranged in the lifting tube through a threaded structure, the top ends of the pair of lifting tubes are connected through a horizontal first connecting plate 2, a pair of vertical display boards 4 are symmetrically hinged on the edges of the first connecting plate 2, and music paper 8 is detachably arranged on the display board 4, when the two support rods 17 rotate synchronously, under the limiting effect of the support tube 1 and the first connecting plate 2, the two lifting tubes are lifted and lowered along the corresponding support rods 17 and the support tube 1, thereby directly or indirectly driving the first connecting plate 2, the display board 4, and the music paper 8 to lift and lower, and flexibly adjusting the height of the music paper 8 and the music display height to meet the use requirements of different music display heights; the first connecting plate 2 is hinged with a pair of display boards 4, which can display different music scores at the same time, thereby improving the practicality of the device.

[0024] In another technical solution, Figure 1As shown, in the music score display device, a pair of first limit plates 16 distributed up and down are provided at the bottom of the support tube 1, the bottom end of the support rod 17 passes through the pair of first limit plates 16 and is rotatably connected to each first limit plate 16, a synchronous pulley 11 is fixedly sleeved on the support rod 17 between the pair of first limit plates 16, a first connecting hole corresponding to the position of the synchronous pulley 11 is provided on the side wall of the support tube 1, and a synchronous belt 13 passing through the first connecting hole is sleeved on the two synchronous pulleys 11, wherein the bottom end of one support rod 17 is connected to the output shaft of the first motor 18 located at the bottom of the corresponding support tube 1. The first motor 18 drives one support rod 17 to rotate, and one support rod 17 directly or indirectly drives one synchronous pulley 11, synchronous belt 13, another synchronous pulley 11, and another support rod 17 to rotate, so that a pair of lifting tubes threadedly connected on the two support rods 17 are synchronously lifted and lowered to adjust the height.

[0025] In another technical solution, Figure 1 , Figure 2 As shown, in the music score display device, the first support plate 15 is in the shape of a cuboid, a pair of support tubes 1 are distributed in the length direction of the first support plate 15, and the distance between the two support tubes 1 is greater than the width of the first support plate 15, and a rotating block 14 rotatably connected to the first support plate 15 is connected to the bottom of the pair of support tubes 1, and a limit block 21 is provided on the side wall of the support tube 1, and a vertical first adjustment hole is provided on the limit block 21, and a vertical adjustment rod 19 is lifted and lowered at the first adjustment hole, and a plurality of first limit holes distributed vertically and horizontally are provided on the adjustment rod 19, and a horizontal second limit hole is provided on the limit block 21, and limit rods 22 are inserted into the corresponding second limit holes and the first limit holes, and a roller 20 is provided at the bottom of the adjustment rod 19. The limiting rod 22 can be a screw rod, which is moved and inserted into the second limiting hole through a threaded structure; the rotating block 14 is rotated to separate the two support tubes 1 from the first support plate 15, and then the limiting rod 22 is pulled out from the first limiting hole, and the height of the adjusting rod 19 is adjusted along the first adjustment hole until the roller 20 contacts the ground, and then the limiting rod 22 is inserted into the corresponding first limiting hole to limit the adjusting rod 19, and then the rotating block 14 is rotated to synchronously drive the two support tubes 1 and the two rollers 20 to rotate, and indirectly adjust the display angle of the display board 4, and the two rollers 20 support the device at the same time as the first support plate 15, thereby improving the stability of the device; when the height of the adjusting rod 19 is adjusted so that the roller 20 is lower than the first support plate 15, the device can be conveniently moved.

[0026] In another technical solution, Figure 1 , Figure 2As shown, in the music score display device, a vertical second limit plate 10 is provided on the first support plate 15, a horizontal first limit slot is provided at the bottom of the limit block 21, the top of the second limit plate 10 is slidably inserted in the first limit slot, a third limit hole corresponding to the second limit hole and horizontal is provided on the second limit plate 10, and the limit rod 22 is inserted in the third limit hole. The rotating block 14 is prevented from rotating freely relative to the first support plate 15.

[0027] In another technical solution, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in the music score display device, the top of the display board 4 is hinged with the first connecting plate 2, and at the bottom of the first connecting plate 2, a pair of support frames arranged side by side are arranged between the pair of display boards 4, and the support frame is provided with a telescopic cylinder 28 that rotates up and down on a vertical plane, and the telescopic end of the telescopic cylinder 28 is hinged with the inner side of the corresponding display board, and a limiter 23 is provided on the support frame for lifting and lowering, and the limiter 23 abuts against the top of the non-telescopic end of the telescopic cylinder 28. The telescopic cylinder 28 is rotatably connected with the support frame, so that the telescopic cylinder 28 rotates clockwise or counterclockwise on the vertical plane to adapt to the angle change caused by the display board 4 when the telescopic cylinder 28 is extended and retracted. The telescopic cylinder 28 can adjust the angle between the display board 4 and the first connecting plate 2, thereby adjusting the display angle of the display board 4; the limiter 23 is used to limit the position of the telescopic cylinder 28, provide a part of the balancing force for the telescopic cylinder 28, and prevent it from rotating at will, so as to support the display board 4 at different angles.

[0028] In another technical solution, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in the music score display device, the support frame includes a pair of vertical second support plates 9, the telescopic cylinder 28 is rotatably arranged between the pair of second support plates 9, and a plurality of pairs of upper and lower distributed limiting notches 29 are arranged on the pair of second support plates 9, the limiting member 23 is L-shaped, the horizontal portion of the limiting member 23 is inserted in one of the limiting notches 29, and the vertical portion of the limiting member 23 abuts against the top of the non-telescopic end of the telescopic cylinder 28. When the limiting member 23 is located at the uppermost limiting notch 29, the telescopic cylinder 28 is horizontal, and after the telescopic cylinder 28 is fully retracted, the display board 4 is in a vertical state, and when the limiting member 23 is located at the lowermost limiting notch 29, the telescopic cylinder 28 is tilted, and when the telescopic cylinder 28 is fully extended, the display board 4 is in a horizontal state, and can be used as a horizontal display stand.

[0029] In another technical solution, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in the music score display device, a pair of support shafts 31 are arranged on the opposite surfaces of a pair of second support plates 9, a support tube 24 rotatably connected thereto is arranged between the pair of support shafts 31, the non-telescopic end of the telescopic cylinder 28 is arranged in the support tube 24, and the vertical portion of the limiter 23 abuts against the support tube 24. The support tube 24 supports the telescopic cylinder 28 and provides protection for the telescopic cylinder 28, and the rotation of the support tube 24 can drive the telescopic cylinder 28 to rotate and adjust the support angle.

[0030] In another technical solution, Figure 1 , Figure 2 As shown, in the music score display device, a plurality of second connecting plates 3 are arranged on the top of the display board 4. When a pair of display boards 4 are horizontal, the second connecting plates 3 on the pair of display boards 4 are detachably connected by connecting members. The second connecting plates 3 are perpendicular to the display boards 4. When the pair of display boards 4 are horizontal, the two corresponding second connecting plates 3 can be surrounded and bundled by a binding belt to make the horizontal state of the display boards 4 more stable. The two display boards 4 are pulled against each other to reduce the pressure on the telescopic cylinder 28.

[0031] In another technical solution, Figure 1 , Figure 2 As shown, in the music sheet display device, a pair of horizontal long strip movable holes 5 distributed up and down are provided on the display board 4, and two pairs of connecting frames 6 are movably provided at the pair of movable holes 5, and connecting rods 7 perpendicular to the movable holes 5 are rotatably provided on the connecting frames 6, and reels 32 coaxial therewith are detachably provided between the pairs of connecting rods 7 of each pair of connecting frames 6, and the music sheet 8 is rolled on the reels 32. The connecting rod 7 away from the first connecting plate 2, that is, the connecting rod 7 close to the lower movable hole 5, is perpendicular to and connected to the output shaft of the second motor 12 located on its corresponding connecting frame 6; the second motor 12 drives the connecting rod 7 to rotate, and then directly or indirectly drives the reels 32 to rotate, so as to unroll the music sheet 8; the two reels 32 are respectively connected to the two ends of the music sheet 8 to fix the music sheet 8, and the connecting frame 6 is moved along the movable hole 5 to adjust the flatness of the music sheet 8; the reels 32 and the connecting rod 7 are detachably connected to facilitate the replacement of the music sheet.

[0032] In another technical solution, Figure 1 , Figure 2As shown, in the music display device, the connecting frame 6 includes: a slide plate 26, which is parallel to the moving hole 5 and is movably inserted in the moving hole 5, the two ends of the slide plate 26 extend out of the moving hole 5 and are fixedly provided with an inner limit plate 25 and an outer limit plate 27 perpendicular to the slide plate 26, the inner limit plate 25 and the outer limit plate 27 are both in sliding contact with the display board 4, the outer limit plate 27 is provided with a first positioning hole, and the display board 4 is provided with a plurality of second positioning holes distributed along the moving track of the first positioning hole, and a positioning rod is inserted in the corresponding first positioning hole and the second positioning hole. The inner limit plate 25 and the outer limit plate 27 are used to limit the position of the slide plate 26 so that the slide plate 26 does not leave the moving hole 5; the positioning rod can be a screw and is inserted in the corresponding first positioning hole and the second positioning hole through a threaded structure, which is used to limit the position of the outer limit plate 27, and then limit the position of the connecting frame 6, to prevent the connecting frame 6 from sliding freely in the moving hole 5 and affecting the flatness of the music paper 8.

[0033] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0034] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A music score display device, characterized in that: include: A first horizontal support plate is provided with a pair of vertical support tubes, a pair of lifting tubes are synchronously lifted and lowered in the pair of support tubes, support rods coaxial with the lifting tubes are rotatably provided in the lifting tubes through a threaded structure, the top ends of the pair of lifting tubes are connected through a first horizontal connecting plate, a pair of vertical display boards are symmetrically hinged on the edges of the first connecting plate, and music sheets are detachably provided on the display boards.

2. The music score display device according to claim 1, characterized in that: A pair of first limit plates distributed up and down are provided at the bottom of the support tube, the bottom end of the support rod passes through the pair of first limit plates and is rotatably connected to each first limit plate, a synchronous pulley is fixedly sleeved on the support rod between the pair of first limit plates, a first connecting hole corresponding to the position of the synchronous pulley is provided on the side wall of the support tube, and a synchronous belt passing through the first connecting hole is sleeved on the two synchronous pulleys, and the bottom end of one of the support rods is connected to the output shaft of the first motor located at the bottom of the corresponding support tube.

3. The music score display device according to claim 1, characterized in that: The first support plate is in the shape of a rectangular parallelepiped, a pair of support tubes are distributed in the length direction of the first support plate, and the distance between the two support tubes is greater than the width of the first support plate, a pair of support tubes are connected to the bottom with a rotating block rotatably connected to the first support plate, a limit block is provided on the side wall of the support tube, a vertical first adjustment hole is provided on the limit block, a vertical adjustment rod is provided for lifting at the first adjustment hole, a plurality of first limit holes distributed up and down and horizontal are provided on the adjustment rod, a horizontal second limit hole is provided on the limit block, limit rods are inserted into the corresponding second limit hole and the first limit hole, and a roller is provided at the bottom of the adjustment rod.

4. The music score display device according to claim 3, characterized in that: A vertical second limiting plate is arranged on the first supporting plate, a horizontal first limiting slot is arranged at the bottom of the limiting block, the top of the second limiting plate is slidably inserted in the first limiting slot, a third limiting hole corresponding to and horizontal to the second limiting hole is arranged on the second limiting plate, and the limiting rod is inserted in the third limiting hole.

5. The music score display device according to claim 1, characterized in that: The top of the display board is hinged to the first connecting plate, and at the bottom of the first connecting plate, a pair of support frames arranged side by side are provided between the pair of display boards, and a telescopic cylinder that rotates up and down on a vertical plane is provided on the support frame, and the telescopic end of the telescopic cylinder is hinged to the inner side surface of the display board corresponding to it, and a limit piece is provided on the support frame for lifting and lowering, and the limit piece abuts against the top of the non-telescopic end of the telescopic cylinder.

6. The music score display device according to claim 5, characterized in that: The support frame includes a pair of vertical second support plates, the telescopic cylinder is rotatably arranged between the pair of second support plates, and a plurality of pairs of upper and lower distributed limit notches are arranged on the pair of second support plates. The limit piece is L-shaped, and the horizontal portion of the limit piece is inserted in one of the limit notches, and the vertical portion of the limit piece abuts against the top of the non-telescopic end of the telescopic cylinder.

7. The music score display device according to claim 6, characterized in that: A pair of support shafts are arranged on the opposite surfaces of a pair of second support plates, a support tube rotatably connected thereto is arranged between the pair of support shafts, the non-telescopic end of the telescopic cylinder is arranged in the support tube, and the vertical portion of the limit member abuts against the support tube.

8. The music score display device according to claim 6, characterized in that: A plurality of second connecting plates are arranged on the top of the display board. When a pair of display boards are horizontal, the second connecting plates opposite to each other on the pair of display boards are detachably connected via connecting pieces.

9. The music score display device according to claim 1, characterized in that: The display board is provided with a pair of horizontal long strip movable holes distributed up and down, two pairs of connecting frames are movably provided at the pair of movable holes, connecting rods perpendicular to the movable holes are rotatably provided on the connecting frames, and reels coaxial with the connecting rods of each pair of connecting frames are detachably provided between the pairs of connecting rods, and the music paper is rolled up on the reels.

10. The music score display device according to claim 9, characterized in that: The connecting frame includes: a slide plate, which is parallel to the moving hole and movably inserted in the moving hole, two ends of the slide plate extend out of the moving hole and are fixedly provided with an inner limit plate and an outer limit plate perpendicular to the slide plate, the inner limit plate and the outer limit plate are both in sliding contact with the display board, the outer limit plate is provided with a first positioning hole, and the display board is provided with a plurality of second positioning holes distributed along the moving trajectory of the first positioning hole, and positioning rods are inserted into the corresponding first positioning holes and second positioning holes.

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