Tone adjusting mechanism for rapid tone modification of Banhu
The erhu's pitch adjustment mechanism allows for rapid and stable pitch changes through a sliding groove and interlocking teeth system, addressing the impracticality of existing methods and improving the instrument's usability.
Patent Information
- Application Number
- CN202422048242.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-23
AI Technical Summary
Existing methods for changing the pitch of an erhu (a Chinese bowed string instrument) are either impractical due to broken strings or cumbersome mechanisms, failing to meet the needs of musicians for quick and reliable pitch adjustment.
A mechanism involving a sliding groove on the instrument's neck with movable pegs and interlocking teeth allows for rapid pitch changes by altering the distance of the pegs from the sound source, facilitated by a sliding mechanism and interlocking teeth for stable positioning.
Enables rapid and stable pitch changes with simple operations, enhancing the erhu's versatility and ease of use.
Smart Images
Figure CN223108519U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tone adjusting mechanism, in particular to a tone adjusting mechanism for quickly changing the tone of a banhu, belonging to the field of musical instruments. Background Art
[0002] The banhu is the most important representative bowed string instrument among Chinese national musical instruments and has formed its own unique style in long-term artistic practice. With the continuous improvement of the artistic level of the banhu, people increasingly need the banhu to play in different keys. If the banhu can achieve quick multi-key changes, it can not only improve the playing skills of the banhu, but also make the application range of the banhu wider. In the past, some people have tried to change the key by changing the tension of the strings, but since the strings are made of steel wire and are extremely easy to break, it is not advisable; some people have also tried to change the key by making several sliding weights or moving the sliding weight, but finally, due to too many accessories, the operation is cumbersome and not practical, and the pitch is not easy to be accurate after changing the key, etc., it is not accepted by the performers. How to quickly change the playing tone of the banhu with simple operation is the direction that banhu players have been pursuing. Summary of the Invention
[0003] Aiming at the purpose that banhu players hope to use one musical instrument to achieve playing in different tones, the utility model provides a tone adjusting mechanism for quickly changing the tone of a banhu. The purpose is to set a sliding weight slideway for sliding up and down on the banhu rod, a sliding weight with a sliding weight inner groove is slidably arranged on the sliding weight slideway, positioning teeth that can be separated and meshed with each other are arranged on the same side of the sliding weight slideway and the sliding weight inner groove. By changing the position of the sliding weight on the sliding weight slideway, the distance between the sliding weight and the sounding part is changed, so as to realize the change of the banhu tone, and through the mutual meshing between the positioning teeth, the purpose of quickly changing the key and quickly positioning is realized. The operation of using this structure is simple, convenient and practical, and improves the application range of the banhu.
[0004] The technical solution of the utility model is: a tone adjusting mechanism for quickly changing the tone of a banhu, including the banhu shell of the banhu, the banhu rod fixed on the banhu shell, the fiddle support arranged at the lower part of the banhu shell, a pair of strings connected between the bottom of the banhu and the tuning peg at the top of the banhu rod, the sliding weight and the bridge respectively arranged on the banhu rod and the banhu shell board surface. A sliding weight slideway is arranged on the banhu rod on the side facing the strings, a sliding weight that can slide up and down along the sliding weight slideway is arranged on the sliding weight slideway, a sliding weight inner groove opposite to the sliding weight slideway is arranged on the side of the sliding weight facing the banhu rod, a side tooth is arranged on one side of the sliding weight slideway, an inner tooth meshing with it is arranged on one side of the sliding weight inner groove corresponding to the side tooth, the width of the lower part of the sliding weight inner groove is greater than the width of the sliding weight slideway, a support point is arranged between the sliding weight slideway and the bottom of the sliding weight inner groove in the horizontal direction opposite to the strings, and there is a rotational clearance between the sliding weight and the sliding weight slideway with the support point as the center of the circle and the vertical direction passing through the support point and parallel to the banhu rod as the rotation axis;
[0005] Further, an inwardly concave arc is provided on the side of the qianjin opposite to the banhu rod, and the radius of the inwardly concave arc on the qianjin is greater than the radius of the banhu rod;
[0006] Further, the opposite side of the inner teeth of the inner groove of the qianjin is an inclined edge that is narrower at the top and wider at the bottom, and the side teeth of the qianjin slideway are acute angles with the tooth tips facing upward;
[0007] Further, a tuning sticker is pasted on the inner side of the banhu rod, and the tuning sticker is a tone indication sticker for the qianjin at various positions on the qianjin slideway;
[0008] Further, the rotation gap of the qianjin is greater than the tooth depth of the side teeth or inner teeth, and less than 1 / 2 of the minimum width of the inner groove of the qianjin.
[0009] The positive effects of the present utility model are as follows: By providing a qianjin slideway on the side of the hu rod facing the strings, with a qianjin sliding up and down along the qianjin slideway on the qianjin slideway, and a qianjin inner groove opposite to the qianjin slideway is provided on the side of the qianjin facing the banhu rod, the qianjin inner groove can slide along the length direction of the qianjin slideway, changing the height of the qianjin from the sound-producing part of the banhu. Different heights of the qianjin from the sound-producing part of the banhu determine different tones of the sound. Different positions of the qianjin on the qianjin slideway will produce different tones; By providing a support point between the qianjin slideway and the bottom of the qianjin inner groove in the horizontal direction opposite to the strings on the banhu rod, the qianjin can rotate around the support point with a vertical direction parallel to the banhu rod passing through the support point as the rotation axis, and the rotation range is within the gap range. Through the rotation of the qianjin, the inner teeth on one side of the qianjin inner groove and the side teeth on one side of the qianjin slideway can mesh or separate from each other within the gap range. After separation, the qianjin can slide along the qianjin slideway. After meshing, the qianjin can be positioned at a certain high-tone position; By providing an arc on the side of the qianjin opposite to the banhu rod and making the radius of the arc greater than the radius of the banhu rod, under the action of a manual thrust in the left-right direction, it can not only ensure the separation between the inner teeth of the qianjin inner groove and the side teeth of the qianjin slideway, but also enable the inner teeth of the qianjin inner groove and the side teeth of the qianjin slideway to mesh with each other. After meshing, the qianjin is relatively stable on the qianjin slideway. Especially when the side teeth are acute angles with the tooth tips facing upward, it can prevent the qianjin from sliding downward during use and ensure the stable position of the qianjin; By making the left side of the qianjin inner groove an inclined edge that is narrower at the top and wider at the bottom, it is beneficial to the rapid separation and meshing between the inner teeth and the side teeth; By pasting a tuning sticker on the inner side of the banhu rod, and the tuning sticker is a tone indication sticker for the qianjin at various positions on the qianjin slideway, the position of the qianjin can be quickly adjusted according to the tuning sticker; By using the present utility model, the tone of the banhu can be quickly changed, improving the application range of the banhu. This structure is simple to operate, convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 Schematic diagram of the overall structure of the banhu.
[0011] Figure 2Schematic top view structure of the banhu rod, the thousand-jin slideway, and the thousand-jin.
[0012] Figure 3 Enlarged schematic view of the support point between the thousand-jin slideway and the thousand-jin.
[0013] Figure 4 Schematic view of the inner groove of the thousand-jin on the banhu rod facing the direction of the thousand-jin.
[0014] Label description: 10 - tuning peg, 11 - banhu rod, 12 - thousand-jin slideway, 13 - thousand-jin, 14 - side teeth, 15 - strings, 16 - bridge, 17 - banhu shell, 18 - banhu support, 19 - tonality sticker, 20 - inner groove of the thousand-jin, 21 - inner teeth, 22 - support point, 23 - inclined edge, 24 - arc, 25 - board surface. Detailed implementation mode
[0015] The following will describe the technical solution of the present invention in detail with reference to the accompanying drawings. In the following description, the specific orientation is the orientation in the state of using the banhu. Generally, the left hand holds the banhu rod and the right hand pulls the bow to play. The left or right side is determined by whether the thousand-jin slideway is close to the left or right side. The vertical direction refers to the usage condition of the banhu in the erected state.
[0016] The technical solution of the present invention is: a tone adjustment mechanism for quickly changing the tone of a banhu, including the banhu shell 17 of the banhu, the banhu rod 11 fixed on the banhu shell 17, the banhu support 18 arranged at the lower part of the banhu shell 17, a pair of strings 15 connected between the bottom of the banhu and the tuning peg 10 at the top of the banhu rod 11, the thousand-jin 13 and the bridge 16 respectively arranged on the banhu rod 11 and the board surface 25 of the banhu shell 17. A thousand-jin slideway 12 is arranged on the side of the banhu rod 11 facing the strings 15. The thousand-jin 13 is arranged on the thousand-jin slideway 12 and slides along the length direction of the thousand-jin slideway 12. On the side of the thousand-jin 13 facing the banhu rod 11, there is an inner groove 20 of the thousand-jin opposite to the thousand-jin slideway 12. On one side of the thousand-jin slideway 12, there are side teeth 14. On one side of the inner groove 20 of the thousand-jin corresponding to the side teeth 14, there are inner teeth 21 meshing with them. The width of the inner groove 20 of the thousand-jin is greater than the width of the thousand-jin slideway 12. On the horizontal direction of the thousand-jin slideway 12 opposite to the strings 15, there is a support point 22 between the bottom of the thousand-jin slideway 12 and the inner groove 20 of the thousand-jin. The thousand-jin 13 has a rotation gap with the support point 22 as the center and the vertical direction passing through the support point 12 and parallel to the banhu rod 11 as the rotation axis. The support point changes as the thousand-jin 13 moves on the thousand-jin slideway 12.
[0017] Here, the support point 22 is the position of a certain point of the thousand-jin 13 on the thousand-jin slideway 12. Countless support points 22 on the thousand-jin slideway 12 form a linear structure connected to the thousand-jin slideway 12.
[0018] On the side of the qianjin 13 opposite to the banhu rod 11, there is an inward concave arc 24, and the radius of the inward concave arc 24 on the qianjin is greater than the radius of the banhu rod 11.
[0019] On the opposite sides of the inner teeth 21 of the inner groove 20 of the qianjin, there are inclined edges 23 that are narrower at the top and wider at the bottom. The side teeth 14 of the qianjin slideway 12 are acute angles with the tooth tips facing upward. In this embodiment, on the left side inside the inner groove 20 of the qianjin, there are inclined edges 23 that are narrower at the top and wider at the bottom, and on the right side of the qianjin slideway 12, there are side teeth 14, and the side teeth 14 are acute angles with the tooth tips facing upward; the side teeth 14 and the inner teeth 21 respectively adopt self-locking binding tapes. The binding tape of the side teeth 14 is pasted on the right side of the qianjin slideway 12, and the inner teeth 21 are pasted on the opposite inner side of the qianjin. When pasting, in order for the two to mesh with each other, the binding tapes for the side teeth 14 and the inner teeth 21 adopt the same type of plastic binding tape, and the binding tapes of the side teeth 14 and the inner teeth 21 are in the opposite up-and-down directions.
[0020] On the inner side of the banhu rod 11, there is a tuning label 19, and the tuning label 19 is a tone indication label for the qianjin 13 at various positions on the qianjin slideway 12.
[0021] Although this embodiment is for the tone adjustment mechanism of the banhu, it can also be used in similar musical instruments such as the erhu.
[0022] The rotation clearance of the qianjin 13 is greater than the tooth depth of the side teeth 14 or the inner teeth 21 and less than 1 / 2 of the minimum width of the inner groove 20 of the qianjin.
[0023] In this utility model, a thousand-jin slideway 12 is arranged on the banhu rod 11 towards the side of the strings 15. A thousand-jin 13 that slides along the length direction of the thousand-jin slideway 12 is arranged on the thousand-jin slideway 12. On the side of the thousand-jin 13 towards the banhu rod 11, a thousand-jin inner groove 20 opposite to the thousand-jin slideway 12 is arranged, enabling the thousand-jin inner groove 20 to slide along the length direction of the thousand-jin slideway 12, changing the height of the thousand-jin 13 from the sound-producing part of the banhu. Different heights of the thousand-jin 13 from the sound-producing part of the banhu determine the tones of the sound. Different positions of the thousand-jin 13 on the thousand-jin slideway 12 will produce different pitches; by arranging a support point 22 between the bottom of the thousand-jin slideway 12 and the thousand-jin inner groove 20 in the horizontal direction opposite to the strings 15 on the banhu rod 11, the thousand-jin 13 can rotate with the support point 22 as the center and the vertical direction parallel to the banhu rod 11 passing through the support point 22 as the axis of rotation within the clearance range. Through the rotation of the thousand-jin 13, the inner teeth 21 on one side of the thousand-jin inner groove 20 and the side teeth 14 on one side of the thousand-jin slideway 12 can be engaged or separated from each other within the clearance range. After separation, the thousand-jin 13 can slide along the thousand-jin slideway 12. After engagement, the thousand-jin 13 can be positioned at a certain high-pitch position; by arranging an arc 24 on the side of the thousand-jin 13 opposite to the banhu rod 11 and making the radius of the arc 24 larger than the radius of the banhu rod 11, under the manual thrust in the left-right direction, it can not only ensure the separation between the inner teeth 21 of the thousand-jin inner groove 20 and the side teeth 14 of the thousand-jin slideway 12, but also enable the inner teeth 21 of the thousand-jin inner groove 20 and the side teeth 14 of the thousand-jin slideway 12 to be engaged with each other. After engagement, the thousand-jin 13 is relatively stable on the thousand-jin slideway 12. Especially when the side teeth 14 are acute angles with the tooth tips facing upwards, it can prevent the thousand-jin 13 from sliding downwards during use and ensure the stable position of the thousand-jin 13; especially when the side teeth 14 are acute angles with the tooth tips facing upwards, it can prevent the thousand-jin 13 from sliding downwards during use and ensure the stable position of the thousand-jin 13; by making the left side of the thousand-jin inner groove 20 an inclined edge 23 that is narrower at the top and wider at the bottom, it is beneficial for the rapid separation and engagement between the inner teeth 21 and the side teeth 14; by pasting a tonality sticker 19 on the inner side of the banhu rod 11, and the tonality sticker 19 is a tone indication sticker for each position of the thousand-jin 13 on the thousand-jin slideway 12, the position of the thousand-jin 13 can be quickly adjusted according to the tonality sticker 19; by using this utility model, the tone of the banhu can be quickly changed, improving the application range of the banhu. This structure is simple to operate, convenient and practical.
Claims
1. A tone adjustment mechanism for rapid key change of a banhu, comprising a banhu shell of the banhu, a banhu rod fixed on the banhu shell, a sound box arranged at the lower part of the banhu shell, a pair of strings connected between the bottom of the banhu and the tuning peg at the top of the banhu rod, a fret and a bridge respectively arranged on the banhu rod and the banhu shell board surface, characterized in that: A qianjin slideway is provided on the side of the banhu rod facing the strings. A qianjin is arranged on the qianjin slideway and can slide up and down along the qianjin slideway. On the side of the qianjin facing the banhu rod, a qianjin inner groove opposite to the qianjin slideway is provided. On one side of the qianjin slideway, side teeth are provided. On one side of the qianjin inner groove corresponding to the side teeth, internal teeth meshing with the side teeth are provided. The width of the lower part of the qianjin inner groove is greater than the width of the qianjin slideway. A support point is provided between the bottom of the qianjin slideway and the qianjin inner groove in the horizontal direction opposite to the strings. There is a rotational clearance between the qianjin and the qianjin slideway with the support point as the center of the circle and the vertical direction parallel to the banhu rod passing through the support point as the axis of rotation.
2. The tone adjustment mechanism for rapid key change of a banhu according to claim 1, characterized in that: On the side of the qianjin opposite to the banhu rod, a concave arc is provided, and the radius of the concave arc on the qianjin is greater than the radius of the banhu rod.
3. The tone adjustment mechanism for rapid key change of a banhu according to claim 1, characterized in that: On the side opposite to the internal teeth of the qianjin inner groove, there is an inclined edge that is narrow at the top and wide at the bottom, and the side teeth of the qianjin slideway are acute angles with the tooth tips facing upward.
4. The tone adjustment mechanism for rapid key change of a banhu according to claim 1, characterized in that: A tuning label is pasted on the inner side of the banhu rod, and the tuning label is a tone indication label for the qianjin at various positions on the qianjin slideway.
5. The tone adjustment mechanism for rapid key change of a banhu according to claim 1, characterized in that: The rotational clearance of the qianjin is greater than the tooth depth of the side teeth or the internal teeth and less than 1 / 2 of the minimum width of the qianjin inner groove.