A music score positioning device for vocal training

Abstract

The present invention relates to the technical field of training equipment, and specifically to a music score positioning device for vocal training, comprising a base, a lifting mechanism and a support platform, wherein the upper surface of the support platform is provided with a positioning mechanism, wherein the positioning mechanism is two sets, and each set of the positioning mechanism comprises a movable rod and a pressure rod, wherein the movable rod is slidably connected to the support platform, wherein both ends of the movable rod are fixed with sliders, and both ends of the pressure rod are provided with sleeve frames, wherein the sliders are slidably connected to holes in the sleeve frames. The present invention can provide effective support and fixation for a music score book before vocal training is performed by comparing the music score book, and can also quickly adjust the height or tilt angle of the music score book in a fixed state.

Description

Technical Field

[0001] The invention relates to the technical field of vocal training, in particular to a music score positioning device for vocal training. Background Art

[0002] When people are doing vocal training, they often have to refer to the syllables marked on the music book to understand the correct vocalization requirements. In order to provide the trainees with suitable training conditions, they often have to use auxiliary devices to fix the music book so as to free the trainees' hands.

[0003] Existing vocal training auxiliary devices have achieved the support function of music scores, such as the brackets used for string training or bel canto training. At the same time, the height of the bracket can be adjusted according to the actual needs of the trainees. The height adjustment mechanism consists of a lower support rod, an upper support rod and a fastening screw. The upper support rod is connected to the lower support rod by the fastening screw. After loosening the fastening screw, the position of the upper support rod can be adjusted to adjust the height of the entire device. However, when this type of auxiliary device is in use, the inclination angle of the music score support platform is constant, and the trainees need to frequently look down to observe the music score. There are a few auxiliary devices with adjustment functions on the market, and their adjustment work also needs to be done manually by personnel.

[0004] The height adjustment of the auxiliary device and the angle adjustment of the sheet music support need to cooperate with each other to achieve the desired optimal viewing angle. The height adjustment process is relatively simple, but the angle adjustment requires the trainer to make multiple fine adjustments according to the position of the performance, and it is also necessary to prevent the sheet music from slipping or the pages from tilting, which makes the entire adjustment process more cumbersome. To this end, we propose a sheet music positioning device for vocal training. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a music score positioning device for vocal training, which can provide effective support and fix the music score book before a person performs vocal training with reference to the music score book, and can also automatically adjust the height or tilt angle of the music score book in a fixed state, so that the training personnel can observe the music score book from the orientation that suits them best. The function is comprehensive and practical.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a music score positioning device for vocal training, comprising a base, a lifting mechanism and a support platform;

[0007] A square rod and a support are provided in the middle of the upper surface of the base, and the upper end of the square rod extends out from the through hole on the support;

[0008] The lifting mechanism comprises a driving rod and a lifting rod, wherein the driving rod is rotatably arranged in a through hole of a support, the lifting rod is threadedly connected in the driving rod, a square hole matching the square rod is arranged on the lifting rod, a notch is arranged at the upper end of the lifting rod, a pin rod is rotatably connected in the notch, and a swing rod and brackets are arranged on both sides of the swing rod, which are fixedly connected to the outer side of the pin rod;

[0009] The lower surface of the support platform is fixedly connected to the upper end of the rocker arm and the bracket. The upper surface of the support platform is provided with a positioning mechanism and a page turning mechanism. The positioning mechanism is divided into two sets, and each set of positioning mechanism includes a movable rod and a pressure rod. The movable rod is slidably connected to the support platform. Slide blocks are fixedly provided at both ends of the movable rod. Both ends of the pressure rod are provided with sleeve frames. The slider is slidably connected to the hole in the sleeve frame.

[0010] Furthermore, two strip holes are arranged on the support platform, each strip hole is equipped with a movable rod of a positioning mechanism, sliding bars are arranged on the inner sides of both ends of the strip holes, and two sliding grooves matching with the sliding bars are arranged on the outer periphery of the movable rod.

[0011] Furthermore, the sliding bar is embedded and fixed in the strip-shaped hole.

[0012] Furthermore, a guide rod is provided on the lower end surface of the slider, the other end of the guide rod passes through the sleeve frame, and the portion of the guide rod located in the sleeve frame is sleeved with a first spring, and the two ends of the first spring are respectively against the slider and the sleeve frame.

[0013] Furthermore, a receiving groove is also provided on the upper surface of the support platform, and a longer edge of the receiving groove has an arc transition.

[0014] Furthermore, the positioning mechanism also includes a locking assembly, which includes a locking bolt, a plurality of locking pins and a plurality of second springs. The lower end of the movable rod is provided with a screw hole extending along its axial direction, and the locking bolt is threadedly connected in the screw hole. The peripheral side of the movable rod is provided with a plurality of locking holes extending in its radial direction. First limiting bosses are provided at both ends of the locking hole, and the locking hole is connected to the screw hole. The locking pin is located in the locking hole and can move radially along the movable rod. One end of the locking pin located in the screw hole is an inclined mating portion matching the end of the locking bolt, and a second limiting boss is provided on the part of the locking pin located in the locking hole. The second spring is sleeved on the outside of the locking pin, and the two ends of the second spring are respectively between the first limiting boss close to the outside of the locking hole and the second boss of the locking pin.

[0015] Furthermore, the end of the locking bolt located in the screw hole is conical, and the cross-sections of the locking hole and the locking pin are both quadrilateral structures.

[0016] Furthermore, a first drive motor is arranged in the base, a bevel gear is arranged on the output shaft of the first drive motor, the drive rod is rotatably connected in the through hole of the support through a bearing, and a bevel gear ring meshing with the bevel gear is fixedly arranged at one end of the drive rod located in the support.

[0017] Furthermore, a semi-turbine ring is provided at the bottom end of the outer surface of the rocker arm, the center of the semi-turbine ring is located on the central axis of the pin rod, and a second drive motor is fixedly connected to the lifting rod, and an output shaft of the second drive motor is provided with a worm that meshes with the semi-worm gear ring.

[0018] Furthermore, the page turning mechanism includes a transverse slide rail, a transverse screw rod, a third drive motor, a longitudinal slide rail, a longitudinal screw rod, a fourth drive motor, a movable block, and a page turning plate. The transverse slide rail is arranged at the front end of the upper surface of the support platform, and the transverse screw rod is rotatably connected to the inside of the transverse slide rail through a bearing. The output shaft of the third drive motor arranged on the right side of the transverse slide rail is fixedly connected to the transverse screw rod. A protrusion is arranged at the rear end of the bottom surface of the longitudinal slide rail, and the protrusion is slidably connected to the transverse slide rail. The transverse screw rod is threadedly connected to a screw hole opened in the middle part of the protrusion at the rear end of the bottom surface of the longitudinal slide rail. The longitudinal screw rod is rotatably connected to the inside of the longitudinal slide rail through a bearing. The output shaft of the fourth drive motor arranged on the rear side of the longitudinal slide rail is fixedly connected to the longitudinal screw rod, the movable block is slidably connected to the inside of the longitudinal slide rail, and the longitudinal screw rod is threadedly connected to the screw hole in the middle part of the movable block. A page turning plate is provided on the rear side of the movable block.

[0019] Furthermore, the pressure rod is rotatably connected to the sleeve frame, a fifth drive motor is arranged outside the sleeve frame, the fifth drive motor is transmission-connected to one end of the pressure rod, and paper pickup wheels are fixedly sleeved on both rear and front ends of the outer arc surface of the pressure rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The music score positioning device for vocal training disclosed in the present invention:

[0022] After the driving rod in the lifting mechanism rotates, the lifting rod is driven up and down through the screw transmission principle, thereby adjusting the overall height of the device. Compared with the adjustment method by fastening screws in the prior art, this method is more accurate and quick.

[0023] The sheet music book is tightly attached to the base through a positioning mechanism, and can stop at different positions of the base through a sliding movable rod, and the distance between the two pressing rods can be adjusted to provide a spacious operating space for pressing and positioning the sheet music book.

[0024] 2. In the music score positioning device for vocal training disclosed in the present invention, the slide bar in the strip hole of the support adopts an inlay design, which is easy to assemble and replace. The slide bar can move up and down in the sleeve frame through the structural design of the guide rod and the first spring, so as to realize the rapid compression and positioning of the music score book.

[0025] 3. For thicker sheet music, the present invention adds a receiving groove on the upper surface of the base, and the receiving groove is used to match the spine of the sheet music. When the spine of the sheet music is placed in the receiving groove, the two opposite pages can be symmetrically laid flat on the upper end surface of the base. In order to adapt to the shape of the sheet music after opening, the present invention adopts an arc transition design for the longer edge of the receiving groove to match the arc-shaped parts of the pages on both sides of the spine, so that the sheet music is flatter after turning the page, and the notes or fonts close to the spine are prevented from being blocked.

[0026] 4. In order to fix the position of the pressure rod after adjustment, the present invention adds a locking assembly to the positioning mechanism. After adjusting the distance between the two pressure rods according to the opening width of the music book, the locking bolt is screwed into the screw hole of the movable rod until the tip of the locking screw contacts the conical ends of the plurality of locking pins. The shapes of the tip of the locking screw and the conical ends of the locking pins match each other. As the locking screw is continuously squeezed, the locking pin moves centrifugally outward, and the outer end of the locking pin contacts and adheres to the support (the inner wall of the sliding hole of the movable rod) and fits tightly to each other. The movable rod is locked, and the distance between the two pressure rods is fixed. In this process, the second spring is compressed. When the movable rod needs to be moved, after the locking bolt is screwed out, the second spring returns to its deformation, driving the locking pin to move centripetally and separate from the support. The position of the movable rod is adjustable.

[0027] 5. In actual use, it is often necessary to repeatedly practice the contents of multiple chapters of the score. In this process, the page on the right side of the score needs to be turned to the left. Since the left and right sides of the score book are clamped by the pressure rod, the right pressure rod needs to be fully lifted before turning the page manually. Although this method can achieve normal page turning, after the pressure rod is lifted, the middle position of the right half of the score book will be arched to a certain height. Therefore, the user needs to press the arched part with his hand and then press the right pressure rod on the score book to flatten the right half of the score book. Similarly, after the page is turned to the left, the left pressure rod is lifted, and the middle position of the left side of the score book will also be arched to a certain height. The pressure rod also needs to be pressed by hand before the score book can be lowered, so there are many inconveniences in the process of turning the page.

[0028] The present invention combines the manual page turning principle with the device's own structural design and adds an automatic page turning mechanism, specifically:

[0029] First, a pickup wheel is arranged on the outer circumference of the two pressure rods, and a driving motor is designed to drive the pressure rods to rotate circumferentially. The rotation angle of the pressure rod is set according to the distance that the sheet of music book needs to move. When the left pressure rod rotates clockwise, the pickup wheel moves the paper in contact with it horizontally to the left by the set distance, and the paper to be turned over is arched. At this time, the paper under the paper with the page to be turned over is in the original flat state;

[0030] Then, the page turning plate moves to the lower part of the arched position of the paper to be turned, and is inserted into the arched position (between the paper to be turned and the next paper), and the page turning plate moves to the left to turn the sheet of music to the side of the pressure bar on the left;

[0031] Finally, the driving motor drives the left pressure rod to rotate clockwise to a set angle, and the paper pickup wheel on the left pressure rod collects the book page underneath it and presses it tightly, completing the page turning function.

[0032] As can be seen from the above, the present invention effectively combines the manual page turning principle with the structure of the present device, which can realize the automatic flipping of the pages on the music book, which improves the functionality of the present invention to a higher level. The present device can cover all the needs of stable support of the music book, convenient height adjustment, stable positioning of the music book and automatic page turning during vocal training. It is comprehensive and practical in function, and its actual promotion is of great significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0035] Figure 3 for Figure 1 The enlarged view of the area marked with A;

[0036] Figure 4 is a cross-sectional view of the present invention;

[0037] Figure 5 for Figure 4 The enlarged view of the area marked with B;

[0038] Figure 6 for Figure 4 The enlarged view of the mark C in the middle;

[0039] Figure 7 is a cross-sectional view of the movable rod;

[0040] Figure 8 for Figure 7 The enlarged structural diagram at the middle mark D;

[0041] Fig. 9 It is a schematic diagram of the structure of the locking pin.

[0042] In the figure: 1-base, 2-support, 3-square rod, 4-support, 5-first drive motor, 6-bevel gear, 7-drive rod, 8-lifting rod, 9-bevel gear ring, 10-pin rod, 11-rocker, 12-bracket, 13-semi-turbine ring, 14-second drive motor, 15-worm, 16-slide, 17-accommodating groove, 18-control switch group, 19-movable rod, 20-pressure rod, 21-slider, 22-guide rod, 23-frame, 24-first spring, 25-fifth drive motor, 26-paper pickup wheel, 27-locking bolt, 28-locking pin, 281-inclined matching part, 29-second spring, 30-screw hole, 31-transverse slide rail, 32-transverse screw rod, 33-third drive motor, 34-longitudinal slide rail, 35-longitudinal screw rod, 36-fourth drive motor, 37-movable block, 38-flip plate. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-9 , this embodiment provides a music score positioning device for vocal training, including a base 1, a lifting mechanism and a support 2;

[0045] A square rod 3 and a support 4 are provided in the middle of the upper surface of the base 1. The upper end of the square rod 3 extends from the through hole of the support 4. A control switch group 18 is provided outside the support 4. A first drive motor 5 is provided in the base 1. A bevel gear 6 is provided on the output shaft of the first drive motor 5.

[0046] The lifting mechanism includes a driving rod 7 and a lifting rod 8. The driving rod 7 is rotatably connected to the through hole of the support 4 through a bearing. A bevel gear ring 9 meshing with the bevel gear 6 is fixedly arranged at one end of the driving rod 7 located in the support 4. The lifting rod 8 is threadedly connected to the driving rod 7. A square hole matching the square rod 3 is arranged on the lifting rod 8. A recess is arranged on the upper end of the lifting rod 8. A pin rod 10 is rotatably connected in the recess. A rocker rod 11 and a bracket 12 are fixedly connected to the outer side of the pin rod 10. A semi-turbine ring 13 is arranged at the bottom end of the outer surface of the rocker rod 11. The center of the semi-turbine ring 13 is located on the central axis of the pin rod 10. A second driving motor 14 is fixedly connected to the lifting rod 8. A worm 15 meshing with the semi-worm gear ring 13 is arranged on the output shaft of the second driving motor 14. There are two brackets 12 located on both sides of the rocker rod 11.

[0047] The lower surface of the support platform 2 is fixedly connected to the upper end of the rocker arm 11 and the bracket 12. Two parallel strip holes are arranged on the support platform 2. Slide bars 16 are arranged on the inner sides of both ends of the strip holes. The slide bars 16 are embedded and fixed in the strip holes. The upper surface of the support platform 2 is provided with a receiving groove 17, a positioning mechanism and a page turning mechanism.

[0048] The longer side edge of the receiving groove 17 is in a rounded transition, and the receiving groove 17 is used to receive the spine of the music score.

[0049] There are two sets of positioning mechanisms, each set of positioning mechanisms includes a movable rod 19, a pressure rod 20 and a set of locking components. Two sliding grooves adapted to the slide bar 16 are arranged on the outer periphery of the movable rod 19, and a movable rod 19 is correspondingly slidably connected in each bar-shaped hole, and a slider 21 is fixedly arranged at both ends of the movable rod 19. A guide rod 22 is arranged at the lower end surface of the slider 21. A sleeve frame 23 is arranged at both ends of the pressure rod 20, and the slider 21 is slidably connected with the hole in the sleeve frame 23. The other end of the guide rod 22 penetrates the sleeve frame 23, and a first spring 24 is sleeved on the part of the guide rod 22 located in the sleeve frame 23. The two ends of the first spring 24 are respectively abutted against the slider 21 and the sleeve frame 23. The pressure rod 20 is rotatably connected with the upper part of the sleeve frame 23, and a fifth driving motor 25 is arranged outside the sleeve frame 23. The fifth driving motor 25 is transmission-connected with one end of the pressure rod 20. A pickup wheel 26 is fixedly sleeved on both ends of the outer arc surface of the pressure rod 20, and the pickup wheel 26 is a toothed wheel made of rubber. The locking assembly includes a locking bolt 27, a plurality of locking pins 28 and a plurality of second springs 29. The lower end of the movable rod 19 is provided with a screw hole 30 extending along its axial direction. The locking bolt 27 is threadedly connected in the screw hole 30. The end of the locking bolt 27 located in the screw hole is conical. A plurality of locking holes extending in its radial direction are arranged on the peripheral side of the movable rod 19. First limiting bosses are arranged at both ends of the locking hole. The locking hole is connected with the screw hole. The locking pin 28 is located in the locking hole and can move radially along the movable rod 19. The cross-sections of the locking hole and the locking pin 28 are both quadrilateral structures. One end of the locking pin 28 located in the screw hole 30 is an inclined matching portion 281 matching the end of the locking bolt. The part of the locking pin 28 located in the locking hole is provided with a second limiting boss. The second spring 29 is sleeved on the outside of the locking pin 28. The two ends of the second spring 28 are respectively between the first limiting boss close to the outside of the locking hole and the second boss of the locking pin 28.

[0050] The page turning mechanism includes a transverse slide rail 31, a transverse screw rod 32, a third drive motor 33, a longitudinal slide rail 34, a longitudinal screw rod 35, a fourth drive motor 36, a movable block 37 and a page turning plate 38. The transverse slide rail 31 is arranged at the front end of the upper surface of the support platform 2, and the transverse screw rod 32 is rotatably connected to the inside of the transverse slide rail 31 through a bearing. The output shaft of the third drive motor 33 arranged on the right side of the transverse slide rail is fixedly connected to the transverse screw rod 32. A protrusion is arranged at the rear end of the bottom surface of the longitudinal slide rail 34, and the protrusion is slidably connected to the transverse slide rail 31. The transverse screw rod 32 is threadedly connected to a screw hole opened in the middle part of the protrusion at the rear end of the bottom surface of the longitudinal slide rail 34. The longitudinal screw rod 35 is rotatably connected to the inside of the longitudinal slide rail 34 through a bearing. The output shaft of the fourth drive motor 36 arranged on the rear side of the longitudinal slide rail 34 is fixedly connected to the longitudinal screw rod 35. The movable block 37 is slidably connected to the inside of the longitudinal slide rail 34. The longitudinal screw rod 35 is threadedly connected to the screw hole in the middle part of the movable block 37. A page turning plate 38 is provided on the rear side of the movable block 37.

[0051] The first drive motor 5 , the second drive motor 14 , the third drive motor 33 , the fourth drive motor 36 , and the fifth drive motor 25 all control the regulation of the switch group.

[0052] The working principle of the music score positioning device for vocal training provided by the present invention is as follows:

[0053] Height adjustment of the platform: When the first driving motor 5 drives the bevel gear 6 to rotate, the driving rod 7 can be rotated due to the meshing connection between the bevel gear 6 and the bevel gear ring 9. Since the driving rod 7 is threadedly connected to the lifting rod 8, the lifting rod 8 moves vertically under the guidance of the square rod 3, thereby adjusting the height of the platform 2 to meet the use requirements of different heights.

[0054] Angle adjustment of the support platform: When the second driving motor 14 drives the worm 15 to rotate, the swing rod 11 and the pin 10 will rotate together with the central axis of the pin 10 as the center of the circle due to the meshing connection between the worm 15 and the semi-turbine ring 13, thereby changing the inclination angle of the support platform 2, so that the trainees can observe the music book fixed on the support platform 2 from the angle that suits them best;

[0055] When the height and angle of the support platform 2 are adjusted, the trainee places the sheet music on the upper surface of the support platform 2 and can manually adjust the position of the movable rod 19 in the strip hole in the support platform 2 according to the size of the sheet music, and then screw the locking bolt 27 into the screw hole. When the locking bolt 27 contacts (matches) with the inclined matching portion 281 at the inner end of the locking pin 28, the locking pin 28 will overcome the elastic force of the second spring 29 and make centrifugal motion along the radial direction of the movable rod 19 under the influence of the thrust of the locking bolt 27, and gradually contact the inner wall of the strip hole in the support platform 2, and realize the position locking of the movable rod 19 through the action of friction resistance, so as to prevent the movable rod 19 from being offset in position in the subsequent process and affecting the fixing effect of the sheet music. Afterwards, the operator manually pulls up the sleeve frame 23 and the pressure rod 20, and releases the pressure rod 20 after the pressure rod 20 is placed above the sheet music book. The first spring 24 recovers its deformation, and under the guidance of the guide rod 22, the sleeve frame 23 and the pressure rod 20 move downward together, and the sheet music book is pressed and fixed by the pickup wheel 26 on the pressure rod 20.

[0056] Page turning principle: in the initial state, the left pickup wheel 26 presses the left half of the sheet music book, the right pickup wheel 26 presses the right half of the sheet music book, and the longitudinal slide rail 34 is located below the right half of the sheet music book. When it is necessary to turn the page, the right pickup roller 26 rotates a specified angle driven by the fifth drive motor 25. Due to the friction between the pickup roller 26 and the contacted paper, the pickup roller 26 can drive the paper that needs to be turned over to the right to slide to the left, and the paper bulges and separates from the next paper. When the paper to be turned over bulges, the fourth drive motor 36 works, drives the movable block 37 and the page turning plate 38 to move toward the raised position of the paper through the screw transmission, and inserts them under the raised position. Then the third drive motor 33 works, drives the longitudinal slide rail 34 to move horizontally to the left through the screw transmission, drives the paper to be turned over to turn to the left to the position of the left pickup roller 26, and the fourth drive motor 36 rotates in the opposite direction to reset the page turning plate 38, and the third drive motor 33 rotates in the opposite direction to reset the longitudinal slide rail 34. Finally, the left pickup roller 26 rotates clockwise driven by the fifth drive motor 25, presses the turned paper under the pickup roller 26, and completes the page turning.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A music score positioning device for vocal training, comprising a base, a lifting mechanism and a support, characterized in that: A square rod and a support are provided in the middle of the upper surface of the base, and the upper end of the square rod extends out from the through hole on the support; The lifting mechanism comprises a driving rod and a lifting rod, wherein the driving rod is rotatably arranged in a through hole of a support, the lifting rod is threadedly connected in the driving rod, a square hole matching the square rod is arranged on the lifting rod, a notch is arranged at the upper end of the lifting rod, a pin rod is rotatably connected in the notch, and a swing rod and brackets are arranged on both sides of the swing rod, which are fixedly connected to the outer side of the pin rod; The lower surface of the support is fixedly connected to the upper end of the swing rod and the bracket. The upper surface of the support is provided with a positioning mechanism and a page turning mechanism. The positioning mechanism is divided into two sets. Each set of positioning mechanisms includes a movable rod and a pressure rod. The movable rod is slidably connected to the support. Slide blocks are fixedly provided at both ends of the movable rod. Frames are provided at both ends of the pressure rod. The slide blocks are slidably connected to the holes in the frame. A guide rod is arranged on the lower end surface of the slider, and the other end of the guide rod passes through the sleeve frame. A first spring is sleeved on the part of the guide rod located in the sleeve frame, and the two ends of the first spring are respectively against the slider and the sleeve frame; the pressure rod is rotatably connected with the sleeve frame, and a fifth drive motor is arranged on the outside of the sleeve frame, and the fifth drive motor is transmission-connected with one end of the pressure rod, and a paper pickup wheel is fixedly sleeved on both the front and rear ends of the outer arc surface of the pressure rod, and the paper pickup wheel is a toothed wheel made of rubber; the positioning mechanism also includes a locking assembly, and the locking assembly includes a locking bolt, a plurality of locking pins and a plurality of second springs, and the lower end of the movable rod is provided with a locking bolt along its axis A screw hole extending in a radial direction, the locking bolt is threadedly connected in the screw hole, a plurality of locking holes extending in a radial direction are arranged on the circumferential side of the movable rod, first limiting bosses are arranged at both ends of the locking hole, the locking hole is communicated with the screw hole, the locking pin is located in the locking hole and can move radially along the movable rod, one end of the locking pin located in the screw hole is an inclined matching portion matching the end of the locking bolt, a second limiting boss is arranged on the part of the locking pin located in the locking hole, the second spring is sleeved on the outside of the locking pin, and the two ends of the second spring are respectively between the first limiting boss close to the outside of the locking hole and the second boss of the locking pin.

2. The music score positioning device for vocal training according to claim 1, characterized in that: Two strip holes are arranged on the support platform, and a movable rod of a positioning mechanism is correspondingly assembled in each strip hole. Slide bars are arranged on the inner sides of both ends of the strip holes, and two slide grooves matching with the slide bars are arranged on the outer periphery of the movable rod.

3. The music score positioning device for vocal training according to claim 2, characterized in that: The slide bar is embedded and fixed in the strip hole.

4. The music score positioning device for vocal training according to claim 1, characterized in that: The upper surface of the support platform is also provided with a receiving groove.

5. The music score positioning device for vocal training according to claim 4, characterized in that: The longer edge of the receiving groove is in arc transition.

6. The music score positioning device for vocal training according to claim 1, characterized in that: The end of the locking bolt located in the screw hole is conical, and the cross-sections of the locking hole and the locking pin are both quadrilateral structures.

7. The music score positioning device for vocal training according to claim 1, characterized in that: A first driving motor is arranged in the base, a bevel gear is arranged on the output shaft of the first driving motor, the driving rod is rotatably connected in the through hole of the support through a bearing, and a bevel gear ring meshing with the bevel gear is fixedly arranged at one end of the driving rod located in the support.

8. The music score positioning device for vocal training according to claim 1, characterized in that: A semi-turbine ring is provided at the bottom end of the outer surface of the rocker arm, the center of which is located on the central axis of the pin rod; a second drive motor is fixedly connected to the lifting rod, and a worm is provided on the output shaft of the second drive motor which meshes with the semi-worm gear ring.

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