Guqin string tuning assembly capable of preventing string from running and automatically locking

Abstract

The application belongs to the technical field of musical instrument accessories, and discloses a string running prevention automatic locking guzheng tuning assembly, which comprises a body and a bridge fixed on the upper end of the body, the bridge is connected with strings on the upper end, a string passing hole is arranged on the right side of the body, a groove is arranged on the right side of the body, a positioning frame is connected to the inner wall of the groove, a string shaft is rotatably connected to the side of the positioning frame, a baffle is connected to the outer part of the string shaft, and a worm wheel is fixed to one end of the string shaft. The string running prevention automatic locking guzheng tuning assembly realizes the basic function of self-locking and string running prevention by relying on a worm gear mechanism, and is matched with a bevel gear reversing transmission and an outer hexagonal adjusting nut, so that the tuning operation is externalized, the operation is convenient, the transmission is smooth and free of blockage, the string shaft is matched with a through positioning hole and a jackscrew to fasten the strings, the two baffles constrain the winding track of the strings, the strings are prevented from slipping and shifting from the root, the pitch deviation is not prone to occurring after long playing, and the tuning stability is significantly enhanced.

Description

Technical Field

[0001] This invention relates to the field of musical instrument accessories technology, specifically to a guzheng tuning assembly that automatically locks in place to prevent string slippage. Background Technology

[0002] The guzheng, a plucked string instrument, also known as the Han zheng or Qin zheng, is an ancient Chinese musical instrument popular throughout China. Over thousands of years of development, it has evolved into four main schools: Hakka zheng, Chaozhou zheng, Shandong zheng, and Henan zheng. It is commonly used for solo performances, ensembles, instrumental ensembles, and accompaniment for songs, dances, operas, and folk arts. It is renowned for its wide range, beautiful tone, rich playing techniques, and strong expressiveness. The guzheng's structure consists of a soundboard, bridges, strings, front nut, tuning pegs, tuning box, feet, back nut, side panels, sound hole, bottom board, and string holes. The guzheng relies on string tension to control pitch. Playing, changes in temperature and humidity, and prolonged vibration can easily cause the tuning pegs to loosen and the strings to slip, requiring frequent tuning and severely affecting the continuity of the performance and the stability of the pitch. Traditional guzheng tuning pegs rely solely on an interference fit between the wooden pegs and the hole in the body, resulting in poor self-locking ability and easy string loosening under playing vibrations. Therefore, a locking mechanism to prevent string slippage is needed.

[0003] An existing guzheng tuning device, such as the one described in Chinese patent application number CN202220663787.X, includes a housing, an adjustment assembly, a cleaning assembly, a guide rod, a threaded rod, and a clamping plate. This invention, by setting up a housing with a gear chamber inside, a knob at the top of the housing, and a connecting rod at the bottom of the knob extending into the gear chamber, includes a first gear at the bottom of the connecting rod. A second gear is perpendicularly meshed with the side of the first gear. A rotating rod is located on the side wall of the second gear, with its other end extending out of the housing and equipped with a hexagonal tuning rod. A hexagonal tuning port is provided on the side of the tuning rod for clamping the tuning pegs of different guzheng models. Rotating the knob drives the first gear to rotate, which in turn drives the second gear and the rotating rod to rotate. When the rotating rod rotates, the tuning rod rotates, causing the tuning pegs to rotate. The gear set's movement drives the tuning pegs to rotate, facilitating tuning operations.

[0004] However, the existing tuning mechanism relies solely on gears to adjust the tension of the strings. But the gear structure lacks a self-locking function. In actual use, the tuning pins are prone to rotation, making it impossible to effectively lock the strings, resulting in poor reliability.

[0005] Therefore, we propose a guzheng tuning component that automatically locks the strings to prevent them from slipping, in order to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a guzheng tuning assembly with automatic locking to prevent string slippage, thereby solving the problems mentioned in the background art, where existing string adjustment structures use gear transmission, lack a self-locking structure, are difficult to effectively lock the strings, and have poor reliability.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a guzheng tuning assembly with automatic locking to prevent string slippage, comprising a body and a bridge fixed at its upper end, wherein the upper end of the bridge is connected to a string. The instrument body has a string hole on the right side and a groove on the right side. A positioning frame is connected to the inner wall of the groove. A tuning peg is rotatably connected to the side of the positioning frame. A baffle is connected to the outside of the tuning peg. One end of the chord shaft is fixed with a worm gear, and a transmission worm is rotatably mounted on the side of the positioning frame. The transmission worm is connected to the worm gear, and a transmission component is connected to the lower end of the transmission worm. The upper end of the positioning frame is fixed with a positioning frame, the lower end of the positioning frame is rotatably connected to the chord shaft, a transmission plate is slidably installed inside the positioning frame, the transmission plate is connected to a guide assembly, the guide assembly includes guide rollers installed on the side of the transmission plate, the guide rollers are symmetrically distributed on both sides of the transmission plate, the side ends of the two sets of guide rollers are connected to first gears, the two sets of first gears mesh with each other, a cleaning assembly is provided at the lower end of the guide assembly, and the cleaning assembly is connected to the guide assembly.

[0008] Preferably, the baffles are symmetrically distributed on both sides of the tuning peg, the side of the groove is covered with a cover plate, and a positioning bolt passes through the side of the cover plate, which is connected to the body bolt.

[0009] By adopting the above technical solution, baffles are symmetrically set on both sides of the tuning pin, which can limit the winding deviation of the strings and prevent the strings from slipping during tuning. At the same time, a cover plate with positioning bolts is added to the outside of the groove, which can seal the internal worm gear transmission structure and prevent dust and moisture from corroding the transmission components. The bolts are easy to install and remove, which facilitates the later inspection and maintenance of the internal tuning structure, thus improving the overall protection of the components and the convenience of disassembly and maintenance.

[0010] Preferably, the transmission assembly includes a first bevel gear, which is fixed to the lower end of the transmission worm gear. A transmission rod is rotatably mounted on the lower end of the positioning frame. A second bevel gear is connected to the left shaft end of the transmission rod, and the second bevel gear meshes with the first bevel gear.

[0011] By adopting the above technical solution, the first and second bevel gears meshing with each other and forming a transmission rod to form a reversing transmission structure, the horizontal transmission is transformed into the vertical rotation of the worm gear. The adjustment operation end is extended to the side of the instrument body, eliminating the need to reach into the groove for operation. The adjustment space is more sufficient, the bevel gear meshing transmission is stable, the power transmission is uniform, the torque output is stable when tuning the strings, and it is not easy to have a jam that affects the tuning accuracy.

[0012] Preferably, a nut is fixed to the right shaft end of the transmission rod, and a hexagonal adjustment groove is provided on the side of the nut. The nut passes through the outside of the cover plate and is rotatably connected to the cover plate.

[0013] By adopting the above technical solution, the nut with the hexagonal adjustment groove is placed on the outside of the cover plate, which is compatible with conventional hexagonal tools for direct operation. Tuning can be completed without disassembling the cover plate, simplifying the operation process. The nut and the cover plate rotate without jamming, which can isolate the internal transmission gap and prevent dust from entering the groove from the operating gap. The hexagonal groove has reliable limiting and is not easy to slip during adjustment, making the tuning operation more labor-saving and efficient.

[0014] Preferably, a positioning hole is provided in the middle of the string shaft, the positioning hole passes through the string shaft, and a grommet screw is threaded to the side of the string shaft, the grommet screw extending into the positioning hole.

[0015] Using the above technical solution, a through-hole is opened in the tuning peg to insert the string, and a nut screw is used to tighten and fix the string. The double limit firmly locks the end of the string, preventing the string from slipping under force and causing it to run. The screw thread tightening force is controllable, and it is easy to disassemble and replace the string. This solves the problem of loose strings and pitch deviation caused by long-term playing of the guzheng from the source of string fixation, and the locking stability is greatly improved.

[0016] Preferably, the top of the transmission plate is T-shaped, and the upper end of the positioning frame is provided with a sliding groove that matches the transmission plate.

[0017] The above technical solution adopts a T-shaped structure design on the top of the transmission plate, and a matching sliding groove is opened on the upper end of the positioning frame. The two work together to form a limiting sliding structure. This structure can accurately limit the movement trajectory of the transmission plate, effectively preventing the transmission plate from shifting, jamming or misaligning during operation, ensuring the stability and smoothness of the transmission structure. At the same time, the T-shaped sliding fit structure has stronger load-bearing capacity and excellent wear resistance, which can effectively extend the service life of the components and ensure the long-term stable operation of the tuning assembly.

[0018] Preferably, the diameter of the guide roller decreases from both ends toward the middle, and the guide roller is wrapped with a rubber layer.

[0019] Using the above technical solution, the guide roller adopts an irregular shape with the diameter decreasing from both ends to the middle, and is wrapped with a rubber protective layer. The gradual diameter structure can accurately center and guide the strings, effectively correct the string deviation, prevent the strings from running off track or misaligning, and meet the tuning and alignment requirements of the guzheng. The outer rubber layer can increase the friction with the strings, improve the guiding stability, and also buffer the extrusion and wear, protect the string surface from damage, and prevent the strings from wearing and breaking, thus balancing the guiding effect and the string protection performance.

[0020] Preferably, a set of guide rollers is connected to a drive gear at its end, a driven gear is rotatably mounted on the outer side of the transmission plate, the drive gear and the driven gear are meshed together, a reciprocating screw is rotatably mounted on the inner wall of the positioning frame, a driven bevel gear is connected to the outside of the reciprocating screw, the driven bevel gear is connected to the outside of the driven gear, and the drive bevel gear and the driven bevel gear are meshed together.

[0021] By adopting the above technical solution, a linkage transmission structure is formed by multi-stage meshing transmission of driving gear, driven gear, driving bevel gear and driven bevel gear, and reciprocating screw. Relying on the stable meshing transmission characteristics of gear and bevel gear, power can be accurately transmitted to drive the reciprocating screw to operate stably, realize the automated reciprocating operation of the structure, and can evenly wind the strings on the surface of the tuning pin when tightening the strings, avoiding accumulation in one place during winding.

[0022] Preferably, a positioning rod is rotatably connected to the lower end of the transmission plate, and a brush roller is connected to the outside of the positioning rod. The positioning rod and the brush roller are symmetrically distributed on both sides of the transmission plate. A second gear is connected to the side end of each of the two sets of positioning rods. The two sets of second gears are meshed together, and the upper end of the second gear is meshed with the first gear.

[0023] Using the above technical solution, positioning rods and brush rollers are symmetrically arranged on both sides of the transmission plate. Multiple sets of gears mesh to achieve synchronous linkage. The symmetrical structure on both sides is evenly stressed and has a comprehensive working range. The gear meshing transmission can drive the two sets of brush rollers to rotate synchronously in opposite directions, realizing automated reciprocating cleaning operation, which can clean the dust and impurities on the surface of the strings in real time.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the guzheng tuning assembly with automatic locking to prevent string slippage; 1. Relying on the worm gear mechanism to achieve the basic function of self-locking and preventing string slippage, combined with bevel gear reversing transmission and external hexagonal adjusting nut, the tuning operation is externalized, which is convenient to operate and the transmission is smooth without jamming. The tuning peg is equipped with a through positioning hole and a set screw to secure the string. The baffles on both sides constrain the winding trajectory of the string, which prevents the string from slipping and shifting from the root. Even after playing for a long time, it is not easy for the pitch to deviate, and the tuning stability is significantly enhanced. 2. The equipment is equipped with a bolt-removable cover plate on the outside, which can completely seal the transmission parts in the groove, effectively preventing dust and moisture from corroding the precision transmission structure such as worm gears and bevel gears, and extending the service life of the components; the cover plate is easy to disassemble and assemble, which facilitates the later inspection and maintenance of the overall tuning mechanism. The whole structure has multiple advantages such as locking to prevent string slippage, convenient tuning, dust protection, and easy maintenance, which are suitable for the long-term performance needs of the guzheng. 3. By symmetrically setting guide rollers on both sides of the transmission plate to form a string guiding structure, and in conjunction with the nested limiting structure of the T-shaped transmission plate and the sliding groove of the positioning frame, the guzheng strings can achieve bidirectional precise limiting guidance, effectively correcting the string positioning deviation and eliminating problems such as sliding deviation, jamming and derailment. The guide rollers adopt a gradient structure that is wide at both ends and narrow in the middle, and with an outer rubber protective layer, the strings can be automatically centered and positioned, adapting to the string guiding needs under different tension states. This not only increases the friction of the contact surface to prevent the strings from slipping and deviating, but also buffers rigid friction damage and protects the strings from damage. At the same time, relying on the meshing and linkage of multiple sets of gears and bevel gears, the reciprocating screw is driven by the autonomous power of the string tightening process, which drives the overall structure to reciprocate, so that the strings can be evenly and neatly wound on the outside of the tuning peg. This improves the problems of string deviation, uneven winding and unstable pitch from the structural root, and significantly improves the tuning accuracy and stability. 4. Further, a linkage cleaning component is set up, which can realize the synchronous linkage operation of guiding and dust removal operations without the need for additional drive structure. The overall integration is high, energy consumption is low, and practicality is strong. During the string tuning and guiding process, two sets of symmetrically arranged brush rollers rotate synchronously in opposite directions with the positioning rod. With the reciprocating movement of the transmission plate, dust, lint and various impurities on the surface of the strings can be cleaned in all directions without dead angles. This effectively avoids problems such as string stiffness and jamming, tension imbalance, decreased tuning accuracy and string slippage caused by dust accumulation. This structure realizes the integrated operation of tuning, guiding and self-dust removal, eliminating the steps of frequent manual cleaning and maintenance. It effectively solves the shortcomings of traditional guzheng, such as easy dust accumulation, cumbersome maintenance and poor tone consistency, and greatly improves the stability of equipment operation and overall service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the groove and cover plate of the present invention; Figure 3 This is a schematic diagram of the worm gear and transmission worm of the present invention; Figure 4 This is a schematic diagram of the positioning hole and the grommet screw structure of the present invention; Figure 5 This is a schematic diagram of the instrument body and string holes of the present invention; Figure 6 This is a schematic diagram of the positioning frame and chord axis structure of the present invention; Figure 7 This is a schematic diagram of the positioning frame and transmission plate structure of the present invention; Figure 8 This is a schematic diagram of the guide roller and the first gear structure of the present invention; Figure 9 This is a schematic diagram of the brush roller and second gear structure of the present invention.

[0026] In the diagram: 1. Body; 2. Bridge; 3. Strings; 4. String hole; 5. Groove; 6. Positioning frame; 7. Tuning pin; 8. Baffle; 9. Worm gear; 10. Transmission worm; 11. First bevel gear; 12. Transmission rod; 13. Second bevel gear; 14. Nut; 15. Cover plate; 16. Positioning bolt; 17. Positioning hole; 18. Measuring screw; 19. Positioning frame; 20. Transmission plate; 21. Guide roller; 22. First gear; 23. Driving gear; 24. Driven gear; 25. Driving bevel gear; 26. Reciprocating screw; 27. Driven bevel gear; 28. Positioning rod; 29. ​​Brush roller; 30. Second gear. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-9 This invention provides a technical solution: a guzheng tuning assembly with automatic locking to prevent string slippage, comprising a body 1, a plurality of bridges 2 mounted on the playing surface of the body 1, each string 3 resting on the top of the corresponding bridge 2, a string hole 4 and a groove 5 on the right side of the body 1, one end of the string 3 being fixed to the left side bridge of the body 1, and the other end passing through the string hole 4 on the right side of the body 1 and extending to the tuning area on the side of the body 1; a positioning frame 6 is connected to the inner wall of the groove 5, a tuning peg 7 is rotatably connected to the side of the positioning frame 6, and a baffle 8 is connected to the outside of the tuning peg 7; the baffles 8 are symmetrically distributed on both sides of the tuning peg 7, and a cover plate 15 covers the side of the groove 5. A positioning bolt 16 runs through the side of the cover plate 15 and is bolted to the body 1. The groove 5 is a mounting compartment for the tuning and locking structure. The outer opening of the groove 5 can be detachably covered by the cover plate 15, which completely seals the opening of the groove 5. The positioning bolt 16 is provided and passes through the through hole of the cover plate 15 and is screwed into the pre-threaded hole on the side wall of the body 1, enabling quick installation and removal of the cover plate 15. After removing the cover plate 15, the internal tuning pins 7 and the positioning bracket 6 can be directly inspected and replaced. After tightening the positioning bolt 16, the cover plate 15 presses against the edge of the groove 5, preventing dust and moisture from entering the groove 5 and preventing the metal tuning pins 7 from rusting and getting stuck. The right end of the string 3 passes through the string hole 4 and enters the groove 5, where it connects to the tuning pin 7. The rotation of the tuning pin 7 is controlled to achieve locking.

[0029] A worm gear 9 is fixed to one end of the tuning peg 7. A transmission worm 10 is rotatably mounted on the side of the positioning frame 6. The transmission worm 10 is connected to the worm gear 9, and a transmission assembly is connected to the lower end of the transmission worm 10. The transmission assembly includes a first bevel gear 11, which is fixed to the lower end of the transmission worm 10. A transmission rod 12 is rotatably mounted on the lower end of the positioning frame 6. A second bevel gear 13 is connected to the left shaft end of the transmission rod 12, and the second bevel gear 13 meshes with the first bevel gear 11. A nut 14 is fixed to the right shaft end of the transmission rod 12. A hexagonal adjustment groove is opened on the side of the nut 14. The nut 14 passes through the outside of the cover plate 15 and is rotatably connected to the cover plate 15. When tuning is required, the operator uses a hexagonal wrench to engage the nut 14. The hexagonal adjustment slot on the side allows the transmission rod 12 to rotate synchronously when the nut 14 is turned. The second bevel gear 13 at the left end of the transmission rod 12 rotates accordingly, and through meshing, drives the first bevel gear 11 and the transmission worm 10 to rotate. The transmission worm 10 further drives the worm wheel 9 and the integrally fixed tuning pin 7 to rotate, thereby realizing the adjustment of the tuning pin 7 on the string 3 and completing the tuning of the guzheng. After tuning, the external adjustment torque is removed. Relying on the mechanical self-locking characteristics of the worm wheel 9 and the transmission worm 10, the rotational freedom of the tuning pin 7 can be completely locked. Even if the string 3 is under continuous tension stress or the guzheng generates high-frequency vibrations from long-term playing, the tuning pin 7 will not rotate in the opposite direction, effectively preventing string slippage and pitch deviation. At the same time, the symmetrically arranged baffles 8 can further improve the installation stability of the tuning pin 7 and prevent axial wobbling from affecting the pitch.

[0030] A positioning hole 17 is provided in the middle of the tuning peg 7, and the positioning hole 17 passes through the tuning peg 7. A grating screw 18 is threaded to the side of the tuning peg 7, and the grating screw 18 extends into the positioning hole 17. When the string 3 is installed, it can pass through the positioning hole 17 in the middle of the tuning peg 7, and with the tightened grating screw 18, it can be used to tighten and fix the end of the string 3, which can completely eliminate the problem of relative slippage and loosening between the string 3 and the tuning peg 7, and further improve the intonation stability after tuning.

[0031] A positioning frame 19 is fixed to the upper end of the positioning frame 6. The lower end of the positioning frame 19 is rotatably connected to the tuning peg 7. A transmission plate 20 is slidably installed inside the positioning frame 19. The transmission plate 20 is connected to a guide assembly. The guide assembly includes guide rollers 21 installed on the side of the transmission plate 20. The guide rollers 21 are symmetrically distributed on both sides of the transmission plate 20. The two sets of guide rollers 21 constitute the string 3 guide assembly, which can provide bidirectional limiting guidance for the guzheng string 3 and effectively correct the deviation of the string 3. The side ends of the two sets of guide rollers 21 are connected to first gears 22, and the two sets of first gears 22 mesh with each other. A cleaning assembly is provided at the lower end of the guide assembly, and the cleaning assembly is connected to the guide assembly. The top of the transmission plate 20 is T-shaped. The upper end of the positioning frame 19 is provided with a sliding groove that matches the transmission plate 20. The nested cooperation between the transmission plate 20 and the sliding groove precisely limits the sliding trajectory of the transmission plate 20, effectively preventing deviation, derailment, and jamming during the sliding process. This significantly improves the smoothness and structural stability of the reciprocating movement of the transmission plate 20, ensuring the accuracy of the overall guiding operation. The diameter of the guide rollers 21 decreases from both ends towards the middle, and the outer surface of the guide rollers 21 is wrapped with a rubber layer. A set of guide rollers 21 is connected to a drive gear 23 at its end. A driven gear 24 is rotatably mounted on the outer side of the transmission plate 20. The drive gear 23 and the driven gear 24 are meshed together. A reciprocating screw 26 is rotatably mounted on the inner wall of the positioning frame 19. A driven bevel gear 27 is connected to the outer side of the reciprocating screw 26. A drive bevel gear 25 is connected to the outer side of the driven gear 24. The drive bevel gear 25 and the driven bevel gear 27 are meshed together. The gradient structure of the two sets of guide rollers 21 enables the automatic centering and positioning of the string 3, preventing the string 3 from sliding left and right or going astray during the guiding process, and adapting to the guiding requirements of the string 3 under different tension states. Meanwhile, the outer rubber layer increases the contact friction with the string 3, improves the guide fit, prevents the string 3 from slipping, and also buffers rigid contact wear, effectively protecting the surface of the string 3, preventing scratches, wear, breakage, and other problems, extending the service life of the string 3, and ensuring stable tone. During the tuning process, the string 3 moves in the middle of the two sets of guide rollers 21. During the movement, it drives the guide rollers 21 to rotate synchronously. When the guide rollers 21 rotate, they can maintain relative rotation through the first gear 22. During the rotation, the driving gear 23 drives the driven gear 24, the driving bevel gear 25, and the driven bevel gear 27 to rotate. The driven bevel gear 27 cooperates with the reciprocating screw 26 to drive the guide rollers 21, the transmission plate 20, and other structures to reciprocate. During the tightening process of the string 3, it can be evenly wound around the outside of the tuning peg 7.

[0032] A positioning rod 28 is rotatably connected to the lower end of the transmission plate 20. A brush roller 29 is connected to the outside of the positioning rod 28. The positioning rod 28 and brush roller 29 are symmetrically distributed on both sides of the transmission plate 20. The brush roller 29 is positioned against the outer side of the string 3, allowing direct cleaning of the string 3 surface. A second gear 30 is connected to the side of each of the two sets of positioning rods 28. The two sets of second gears 30 mesh with each other, and the upper end of the second gear 30 meshes with the first gear 22. The meshing transmission of the first gear 22 and the second gear 30 drives the two sets of positioning rods 28 and brush roller 29 to rotate synchronously in opposite directions, effectively cleaning dust, lint, and impurities from all directions on the surface of the string 3. This completely avoids problems such as string stiffness, unstable tension, decreased tuning accuracy, and string slippage caused by dust accumulation. No additional power is required; automatic dust removal is achieved through mechanical linkage during tuning, integrating tuning, guiding, and dust removal. This effectively solves the shortcomings of traditional guzheng, such as easy string slippage, cumbersome manual maintenance, and poor pitch stability, significantly improving the stability and lifespan of the components.

[0033] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A guzheng tuning assembly with automatic locking to prevent string slippage, comprising a body (1) and a bridge (2) fixed at its upper end, wherein a string (3) is connected to the upper end of the bridge (2), characterized in that: The instrument body (1) has a string hole (4) on the right side and a groove (5) on the right side. The inner wall of the groove (5) is connected to a positioning frame (6). The side of the positioning frame (6) is rotatably connected to a tuning peg (7). The tuning peg (7) is connected to a baffle (8) on the outside. One end of the chord shaft (7) is fixed with a worm gear (9), and a transmission worm (10) is rotatably mounted on the side of the positioning frame (6). The transmission worm (10) is connected to the worm gear (9), and a transmission component is connected to the lower end of the transmission worm (10). The positioning frame (6) is fixed with a positioning frame (19) at its upper end. The lower end of the positioning frame (19) is rotatably connected to the chord shaft (7). A transmission plate (20) is slidably installed inside the positioning frame (19). A guide assembly is connected to the transmission plate (20). The guide assembly includes guide rollers (21) installed on the side of the transmission plate (20). The guide rollers (21) are symmetrically distributed on both sides of the transmission plate (20). The side ends of the two sets of guide rollers (21) are connected to first gears (22). The two sets of first gears (22) mesh with each other. A cleaning assembly is provided at the lower end of the guide assembly. The cleaning assembly is connected to the guide assembly.

2. The guzheng tuning assembly with automatic locking to prevent string slippage as described in claim 1, characterized in that: The baffles (8) are symmetrically distributed on both sides of the tuning peg (7). The side of the groove (5) is covered with a cover plate (15). The side of the cover plate (15) is penetrated by a positioning bolt (16). The positioning bolt (16) is bolted to the body of the instrument (1).

3. The guzheng tuning assembly with automatic locking to prevent string slippage as described in claim 2, characterized in that: The transmission assembly includes a first bevel gear (11), which is fixed to the lower end of the transmission worm (10). The lower end of the positioning frame (6) is rotatably mounted with a transmission rod (12). The left shaft end of the transmission rod (12) is connected to a second bevel gear (13), which meshes with the first bevel gear (11).

4. The guzheng tuning assembly with automatic locking to prevent string slippage according to claim 3, characterized in that: The right shaft end of the transmission rod (12) is fixed with a nut (14). A hexagonal adjustment groove is provided on the side of the nut (14). The nut (14) passes through the outside of the cover plate (15) and is rotatably connected to the cover plate (15).

5. The guzheng tuning assembly with automatic locking to prevent string slippage according to claim 1, characterized in that: The chord shaft (7) has a positioning hole (17) in the middle, the positioning hole (17) passes through the chord shaft (7), and the chord shaft (7) is threaded to the side with a grommet screw (18), the grommet screw (18) extends into the positioning hole (17).

6. The guzheng tuning assembly with automatic locking to prevent string slippage according to claim 1, characterized in that: The top of the transmission plate (20) is designed in a "T" shape, and the upper end of the positioning frame (19) is provided with a sliding groove that is compatible with the transmission plate (20).

7. The guzheng tuning assembly with automatic locking to prevent string slippage according to claim 1, characterized in that: The diameter of the guide roller (21) decreases from both ends toward the middle, and the guide roller (21) is wrapped with a rubber layer.

8. The guzheng tuning assembly with automatic locking to prevent string slippage according to claim 1, characterized in that: A set of guide rollers (21) is connected to a drive gear (23) at the end. A driven gear (24) is rotatably mounted on the outside of the transmission plate (20). The drive gear (23) and the driven gear (24) are meshed. A reciprocating screw (26) is rotatably mounted on the inner wall of the positioning frame (19). A driven bevel gear (27) is connected to the outside of the reciprocating screw (26). A drive bevel gear (25) is connected to the outside of the driven gear (24). The drive bevel gear (25) and the driven bevel gear (27) are meshed.

9. The guzheng tuning assembly with automatic locking to prevent string slippage according to claim 1, characterized in that: The lower end of the transmission plate (20) is rotatably connected to a positioning rod (28), and the outside of the positioning rod (28) is connected to a brush roller (29). The positioning rod (28) and the brush roller (29) are symmetrically distributed on both sides of the transmission plate (20). The side ends of the two sets of positioning rods (28) are connected to a second gear (30), and the two sets of second gears (30) are meshed. The upper end of the second gear (30) is meshed with the first gear (22).

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