A double-beam three-string huqin

Abstract

A double-beam three-string huqin, characterized in that it consists of two parts: a bow and a body, wherein the body is mainly composed of a resonance box, a neck, a bridge and at least three strings. The resonance box includes a sound box, the front opening of the sound box is covered with a front membrane, and the back opening is covered with a back membrane. Two upper sound beams are fixedly arranged on the inner side of the front of the resonance box, and two lower sound beams are fixedly arranged on the inner side of the back. An upper cross-shaped groove is opened on the inner wall surface of the front of the resonance box to form an upper horizontal sound tunnel and an upper vertical sound tunnel, and a lower cross-shaped groove is opened on the inner wall surface of the back of the resonance box to form a lower horizontal sound tunnel and a lower vertical sound tunnel. The present invention designs a new double-membrane vibration type stringed instrument, which has a beautiful timbre and strong penetrating sound.

Description

Technical Field

[0001] The invention relates to a stringed instrument, in particular to a double-beam three-string huqin, which can be a series of three-string huqins such as a small three-string huqin, a medium three-string huqin, and a large three-string huqin. Background Art

[0002] my country's stringed instruments developed on the basis of the huqin, and there are many types, including the erhu, jinghu, banhu, gaohu, zhonghu, gehu, matouqin, etc. Its timbre is soft and it is good at playing singing melodies. It uses various bowing and fingering techniques to create a variety of musical images, with rich and delicate expressiveness.

[0003] There is no three-string huqin in the prior art. Among the stringed instruments in my country, there are only stringed instruments with single membrane vibration, such as the erhu, and there are no stringed instruments with double membrane vibration. The three-string huqin of the present invention is a stringed instrument with double membrane vibration. The number of strings is tentatively set to three, which can be increased to four, or even more. The range of a three-string huqin is four octaves, and the combined range of the three three-string huqins, large, medium and small, can reach six octaves, that is, on the basis of the four octaves of the medium three-string huqin, the small three-string huqin is one octave higher, and the large three-string huqin is one octave lower. Summary of the invention

[0004] The invention aims to provide a new three-string huqin with double membrane vibration.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a double-beam three-string huqin, the innovation of which is: composed of a bow and a body, wherein the body is mainly composed of a resonance box, a neck, a bridge and at least three strings;

[0006] The proximal end of the neck is fixedly connected to one side of the resonance box, the distal end of the neck serves as the first end, and the other side of the resonance box serves as the second end. The resonance box is provided with a front side and a back side, and the bridge stands on the front side of the resonance box. One end of each string is fixed at the first end position, and the other end of each string is fixed at the second end position, and at the same time, each string is mounted on the bridge.

[0007] The resonance box includes a sound box, which is formed into a cylindrical body by side panels along the side edges of the resonance box, and both ends of the cylindrical body are openings, one end of which is the front side, and the other end of which is the back side; the front opening of the sound box is covered with a front membrane, and the back opening of the sound box is covered with a back membrane; a front supporting membrane is fixedly pasted on the inner wall of the front membrane, the front supporting membrane is located in the center of the front membrane, and a gap is left between the edges of the front supporting membrane and the sound box; a back supporting membrane is fixedly pasted on the inner wall of the back membrane, the back supporting membrane is located in the center of the back membrane, and a gap is left between the edges of the back supporting membrane and the sound box.

[0008] Two upper sound beams are arranged in the resonance box. The upper sound beams are long strip-shaped sound beam components. One side of the two upper sound beams is tightly fixed on the inner wall of the front support membrane, and the other side of the two upper sound beams is suspended in the resonance box relative to the back support membrane. The length direction of the two upper sound beams is consistent with the length direction of the resonance box. When viewed in the width direction of the resonance box, the two upper sound beams are parallel and separated by a distance.

[0009] A first groove and a second groove are provided on the inner wall of the front support membrane, the front support membrane in the area corresponding to the first groove and the second groove is removed, the first groove and the second groove are cross-arranged and interconnected on the inner wall of the front membrane, wherein the second groove is located between the two upper sound beams, and the length direction of the second groove is consistent with the length direction of the upper sound beams; the first groove spans the two upper sound beams in the width direction of the resonance box and forms an upper transverse sound tunnel on the inner wall of the front membrane, and the second groove forms an upper longitudinal sound tunnel on the inner wall of the front membrane.

[0010] The relevant contents in the above technical solution are explained as follows:

[0011] 1. In the above scheme, the "resonance box" is also called a sound box for a three-string huqin. The length direction of the three-string huqin resonance box refers to the direction roughly consistent with the strings, and the width direction of the resonance box is the direction perpendicular to the length direction. The "inner wall" for the resonance box refers to the inner wall surface, for example, the inner wall of the front membrane refers to the wall surface on the inner side of the front membrane of the resonance box, and the inner wall of the front support membrane refers to the wall surface on the inner side of the front support membrane of the resonance box.

[0012] 2. In the above scheme, the "skin membrane" refers to a leather membrane or an artificial membrane suitable for making a musical instrument cover, wherein the material of the artificial membrane includes but is not limited to plastic film. The "supporting membrane" refers to a skin membrane that is supported on the inner side of the skin membrane, and the supporting membrane can also be a leather membrane or an artificial membrane, wherein the material of the artificial membrane includes but is not limited to plastic film.

[0013] 3. In the above scheme, two lower sound beams can be provided in the resonance box, and the lower sound beams are long strip-shaped sound beam components. One side of the two lower sound beams is tightly fixed on the inner wall of the reverse support membrane, and the other side of the two lower sound beams is suspended in the resonance box relative to the front support membrane. The length direction of the two lower sound beams is consistent with the length direction of the resonance box. When viewed in the width direction of the resonance box, the two lower sound beams are parallel and separated by a distance.

[0014] A third groove and a fourth groove are provided on the inner wall of the reverse support membrane, the front support membrane in the area corresponding to the third groove and the fourth groove is removed, the third groove and the fourth groove are cross-shaped and interconnected on the inner wall of the reverse membrane, wherein the fourth groove is located between the two lower sound beams, and the length direction of the fourth groove is consistent with the length direction of the lower sound beams; the third groove spans the two lower sound beams in the width direction of the resonance box and forms a lower transverse sound tunnel on the inner wall of the reverse membrane, and the fourth groove forms a lower longitudinal sound tunnel on the inner wall of the reverse membrane.

[0015] 4. In the above solution, a sound post may be provided at the intersection of the first groove and the upper sound beam, with one end of the sound post resting on the bottom of the first groove and the other end resting on the upper sound beam.

[0016] 5. In the above scheme, an upper bridge hole can be provided on the upper sound beam, the upper bridge hole is a hole on one side of the upper sound beam and forms an upper bridge-type sound beam structure, and the upper bridge hole is mounted on the first groove. A lower bridge hole can also be provided on the lower sound beam, the lower bridge hole is a hole on one side of the lower sound beam and forms a lower bridge-type sound beam structure, and the lower bridge hole is mounted on the third groove.

[0017] 6. In the above solution, an upper reinforcing plate may be fixedly mounted between the two upper sound beams, and a lower reinforcing plate may be fixedly mounted between the two lower sound beams.

[0018] 7. In the above scheme, the cross-sectional shape of the sound box can be gourd-shaped, circular, elliptical, rectangular, prismatic or polygonal. When the cross-sectional shape of the sound box is gourd-shaped, an arc-shaped support plate is provided in the resonance box, and the arc-shaped support plate is supported on the gourd-shaped neck.

[0019] 8. In the above solution, the two upper sound beams and the two lower sound beams in the resonance box are arranged correspondingly in the upper and lower directions.

[0020] The design principle and concept of the present invention are: in order to obtain a brand-new double-membrane vibration type three-string huqin with beautiful timbre and strong sound penetration, the present invention has carried out the following major reforms on the basis of the stringed instrument erhu: first, the single-sided membrane mask of the erhu sound box is changed to a double-sided membrane mask, that is, the single-membrane vibration mode is changed to a double-membrane vibration mode; second, the strings are designed to be at least three; third, two upper sound beams are fixedly arranged on the front inner side of the resonance box; fourth, grooves (i.e., the first groove and the second groove) are opened on the front inner side wall of the resonance box to form an upper horizontal sound tunnel and an upper vertical sound tunnel. The present invention focuses on the in-depth discussion and research on the resonance box design and sound generation mechanism of the previous stringed instrument, breaking the constraints of the previous resonance box design of the stringed instrument, and boldly puts forward a new design scheme of the present invention. This new design scheme changes the previous free vibration mode of the resonance box into the current standard vibration mode, and makes bold reforms from the perspectives of vibration, resonance, and sound generation. Practice has proved that the new design scheme has outstanding substantial characteristics and significant technical progress, and has achieved obvious technical effects.

[0021] Due to the application of the above technical solution, the present invention has the following advantages and effects (described in detail with reference to the best implementation mode, i.e., the embodiments of the present invention):

[0022] 1. The present invention is provided with a double sound beam structure in the center of the front and back inner sides of the resonance box (i.e., two upper sound beams are arranged in parallel on the inner wall of the front side, and two lower sound beams are arranged in parallel on the inner wall of the back side). Since the bass has a larger amplitude and lower frequency than the treble, the bass resonance is concentrated in the central area of ​​the resonance box, and the treble resonance is concentrated in the surrounding edge areas of the resonance box. Strengthening the strength of the central area of ​​the front and back sides of the resonance box plays an important role in improving the timbre and sound quality of the bass area. On the other hand, strengthening the strength of the central area of ​​the front and back sides also relatively changes the thickness difference between the central area and the surrounding edge areas of the resonance box, which plays a good role in improving the timbre and sound quality of the treble area.

[0023] 2. The present invention has a front support film pasted on the center of the inner side of the front membrane, and a back support film pasted on the center of the inner side of the back membrane. This technical means can maintain the vibration effect of the composite membrane on the one hand, and can also change the thickness difference between the center of the membrane surface and the surrounding edge areas on the other hand. This plays a positive role in improving the timbre and sound quality of the high and low pitch areas.

[0024] 3. The present invention has an upper cross-shaped groove (i.e., the first groove and the second groove) on the inner wall surface of the front side, and the upper cross-shaped groove actually forms an upper cross-shaped sound tunnel on the inner wall surface of the front side. At the same time, a lower cross-shaped groove (i.e., the third groove and the fourth groove) is provided on the inner wall surface of the reverse side, and the lower cross-shaped groove actually forms a lower cross-shaped sound tunnel on the inner wall surface of the reverse side. Since the bass has a larger amplitude and a lower frequency than the treble, the bass resonance is concentrated in the central area of ​​the resonance box, and the treble resonance is concentrated in the surrounding edge areas of the resonance box. The string vibration is collected by the central area of ​​the cross-shaped sound tunnel and is quickly transmitted to the surrounding areas of the resonance box through the upper cross-shaped sound tunnel and the lower cross-shaped sound tunnel (i.e., the sound tunnel), which plays a key role in improving the timbre and sound quality of the treble area, and also plays a good role in improving the timbre and sound quality of the bass area.

[0025] 4. The combined design of the double sound beam and the cross-shaped sound tunnel of the present invention divides the space corresponding to the front of the resonance box into four resonance areas in a top-down state, and at the same time, divides the space corresponding to the back of the resonance box into four resonance areas, totaling eight resonance areas. When the three-string huqin is played, the vibration of the strings is first transmitted to the central area where the sound tunnels intersect, and then transmitted to the eight resonance areas through the sound tunnels, and resonance and vibration are generated, thereby amplifying the string sound into the resonance sound of the resonance box. The three-string huqin of the present invention can generate ten sound wave quantities when playing, among which eight resonance areas generate eight sound wave quantities, plus one string wave quantity, plus one percussion wave quantity, totaling ten sound wave quantities. The sound wave quantity is the number of sound waves. For a stringed instrument with a specific resonance box, in addition to one string wave quantity and one percussion wave quantity, it mainly depends on the number of resonance areas in the resonance box. Usually, each resonance area of ​​the instrument generates one sound wave quantity when playing, and the number of sound waves generated is the same as the number of resonance areas. In addition, the sound wave quantity directly affects the timbre, penetration and volume of the instrument. Therefore, the three-string huqin of the present invention has good timbre and penetration from the high pitch range to the low pitch range.

[0026] 5. The present invention designs the sound beam into a bridge-type sound beam structure, especially a hole is designed on one side of the sound beam, so that the sound beam is like a bridge arch structure. When such a sound beam is erected on the sound tunnel, it is more conducive to the transmission of vibration through the sound tunnel and also more conducive to the resonance of the resonance box.

[0027] 6. The present invention arranges a sound column between the first groove and the upper sound beam, which can enhance the support strength between the front membrane and the upper sound beam on the one hand, and does not hinder the transmission of sound waves from the central area to the surrounding areas through the first groove on the other hand.

[0028] 7. The present invention fixes an upper reinforcing plate between two upper sound beams and a lower reinforcing plate between two lower sound beams, which can increase the strength of the middle area of ​​the front and back sides of the resonance box, especially between the upper sound beams and between the lower sound beams, and increase the load when the two upper sound beams and the two lower sound beams resonate, thereby improving the timbre and sound quality of the bass area. On the other hand, the central area of ​​the resonance box is strengthened, and the strength gap with the peripheral areas of the resonance box is relatively widened, which is also conducive to improving the timbre and sound quality of the treble area.

[0029] The above advantages and effects are all described in the best way. However, it should be particularly emphasized that for the present invention, the measures of setting a double-tone beam structure and opening a groove on the inner wall of the front support membrane are more important than adopting equivalent measures on the inner wall of the back support membrane, and the effect and effect are relatively better. The reason is that the front membrane is provided with strings, while the back membrane is not directly connected to the strings. Therefore, setting a double-tone beam structure and opening a groove on the inner wall of the front support membrane are the key to solving the technical problem of the present invention, and setting a double-tone beam structure and opening a groove on the inner wall of the back support membrane are icing on the cake for the present invention, which is easy to understand for those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 This is a front view of a three-string huqin according to an embodiment of the present invention;

[0031] Attached Figure 2 It is a right side view of a three-string huqin according to an embodiment of the present invention;

[0032] Attached Figure 3 This is an enlarged view of the resonance box of a three-string huqin according to an embodiment of the present invention;

[0033] Attached Figure 4 This is a structural diagram of the inner side of the back side of the resonance box of the three-string huqin according to an embodiment of the present invention;

[0034] Attached Figure 5 This is a structural diagram of the front membrane, front supporting membrane and upper sound beam of the three-string huqin according to an embodiment of the present invention;

[0035] Attached Figure 6 for Figure 4 AA section view;

[0036] Attached Figure 7 This is a front view of the upper sound beam of the three-string huqin according to an embodiment of the present invention;

[0037] Attached Figure 8 It is a front view of the lower sound beam of the three-string huqin according to an embodiment of the present invention.

[0038] In the above figures: 1. front membrane; 2. front supporting membrane; 3. back membrane; 4. back supporting membrane; 5. sound box; 6. upper sound beam; 7. lower sound beam; 8. first groove; 9. second groove; 10. third groove; 11. fourth groove; 12. upper bridge hole; 13. lower bridge hole; 16. sound post; 17. upper reinforcement plate; 18. lower reinforcement plate; 19. piano bar; 20. fingerboard; 21. strings; 22. bridge; 23. arc support plate; 24. tailpiece; 25. pegs; 26. resonance box. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0040] Embodiment: A double-beam small three-string huqin

[0041] like Figure 1-Figure 8 As shown, the double-beam three-string huqin consists of a bow (not shown) and a body (see Figure 1 and Figure 2 ) two parts, wherein the bow can adopt the existing technology, such as the bow of the violin. The body of the violin is composed of a resonance box 26, a neck 19, a peg 25, a fingerboard 20, a bridge 22, a tailpiece 24 and three strings 21 (see Figure 1 ).

[0042] One end of the piano bar 19 is defined as the proximal end, and the other end is defined as the distal end. The proximal end of the piano bar 19 is fixedly connected to one side of the resonance box 26, the distal end of the piano bar 19 is defined as the first end, and the other side of the resonance box 26 is defined as the second end. The cross-sectional shape of the piano tube 5 in the resonance box 26 is a gourd shape (see Figure 1 and Figure 4 The resonance box 26 has a front side and a back side, and the bridge 22 stands on the front side of the resonance box 26 (see Figure 2 ), one end of the three strings 21 is fixed at the first end position through three pegs 25 (see Figure 1 and Figure 2 ), the other ends of the three strings 21 are fixed at the second end position by a tailpiece 24 (see Figure 1 ), while the three strings 21 near the second end are mounted on the bridge 22 (see Figure 2 and Figure 3 ).

[0043] The resonance box 26 includes a piano tube 5 (see Figure 3 ), the piano box 5 is formed into a cylindrical body by the side panels along the side edges of the resonance box 26. In this embodiment, the cross-sectional shape of the cylindrical body is a gourd shape (see Figure 1 and Figure 4 In order to ensure that the gourd-shaped cylindrical body does not deform, two arc-shaped support plates 23 are provided in the resonance box 26, and the arc-shaped support plates 23 are supported on the neck of the gourd (see Figure 1 The two ends of the cylindrical body are both open, one end of which is the front side, and the other end of which is the back side. The front opening of the piano tube 5 is covered with a front membrane 1 (see Figure 3 ), the reverse opening of the piano tube 5 is covered with a reverse film 3 (see Figure 3 ). Fix the front support film 2 on the inner wall of the front film 1 (see Figure 5 ), the front support film 2 is located in the center of the front membrane 1, and there is a gap between the edges of the front support film 2 and the sound box 5 (because the front support film 2 is the same as the back support film 4, see Figure 4 The reverse support film 4 is fixedly attached to the inner wall of the reverse film 3. The reverse support film 4 is located in the center of the reverse film 3, and a gap is left between the edges of the reverse support film 4 and the piano box 5 (see Figure 4 ). In this embodiment, the front film 1, the front support film 2, the back film 3 and the back support film 4 are all made of cortical films.

[0044] Two upper sound beams 6 and two lower sound beams 7 are arranged in the resonance box 26 (see Figure 3 ), the upper sound beam 6 and the lower sound beam 7 are both long strip sound beam components (see Figure 7 and Figure 8 The upper sound beam 6 is provided with an upper bridge hole 12 (see Figure 7 ), the upper bridge hole 12 is a hole on one side of the upper sound beam 6 so that the upper sound beam 6 forms an upper bridge type sound beam structure, and the upper bridge hole 12 is mounted on the first groove 8. The lower sound beam 7 is provided with a lower bridge hole 13 (see Figure 8 ), the lower bridge hole 13 is a hole on one side of the lower sound beam 7 so that the lower sound beam 7 forms a lower bridge type sound beam structure, and the lower bridge hole 13 is mounted on the third groove 10. One side of the two upper sound beams 6 is tightly fixed on the inner wall of the front support membrane 2 (see Figure 3 ), the other side of the two upper sound beams 6 is suspended in the resonance box 26 relative to the reverse support film 4, the length direction of the two upper sound beams 6 is consistent with the length direction of the resonance box 26, and the two upper sound beams 6 are parallel and separated by a distance in the width direction of the resonance box 26 (refer to Figure 4 One side of the two lower sound beams 7 is fixed closely to the inner wall of the reverse support membrane 4 (see Figure 3 ), the other side of the two lower sound beams 7 is suspended in the resonance box 26 relative to the front support membrane 2, the length direction of the two lower sound beams 7 is consistent with the length direction of the resonance box 26, and the two lower sound beams 7 are parallel and separated by a distance in the width direction of the resonance box 26 (see Figure 4 and Figure 6 ).

[0045] A first groove 8 and a second groove 9 are provided on the inner wall of the front support film 2 (see Figure 4), the front support film 2 in the area corresponding to the first groove 8 and the second groove 9 is removed (refer to Figure 4 ), the first groove 8 and the second groove 9 are cross-intersecting and mutually penetrating on the inner wall of the front membrane 1, wherein the second groove 9 is located between the two upper sound beams 6, and the length direction of the second groove 9 is consistent with the length direction of the upper sound beam 6 (refer to Figure 4 The first groove 8 spans across the two upper sound beams 6 in the width direction of the resonance box 26 and forms an upper transverse sound tunnel on the inner wall of the front membrane 1. The second groove 9 forms an upper longitudinal sound tunnel on the inner wall of the front membrane 1 (see Figure 4 ).

[0046] A third groove 10 and a fourth groove 11 are provided on the inner wall of the reverse support film 4 (see Figure 4 ), the front support film 2 in the area corresponding to the third groove 10 and the fourth groove 11 is removed (see Figure 4 ), the third groove 10 and the fourth groove 11 are cross-intersecting and mutually penetrating on the inner wall of the reverse membrane 3, wherein the fourth groove 11 is located between the two lower sound beams 7, and the length direction of the fourth groove 11 is consistent with the length direction of the lower sound beam 7 (see Figure 4 The third groove 10 crosses the two lower sound beams 7 in the width direction of the resonance box 26 and forms a lower transverse sound tunnel on the inner wall of the reverse membrane 3. The fourth groove 11 forms a lower longitudinal sound tunnel on the inner wall of the reverse membrane 3 (see Figure 4 ).

[0047] A sound post 16 is provided at the intersection of the first groove 8 and the upper sound beam 6 (see Figure 3 ), one end of the sound post 16 is against the bottom of the first groove 8, and the other end is against the upper sound beam 6. An upper reinforcing plate 17 (see Figure 5 ), a lower reinforcing plate 18 is fixedly mounted between the two lower sound beams 7 (see Figure 6 ). The two upper sound beams 6 and the two lower sound beams 7 are arranged in a corresponding position in the vertical direction in the resonance box 26. The two upper sound beams 6 have the same shape and size (see Figure 7 The two lower sound beams 7 have the same shape and size (see Figure 8 ).

[0048] The following is an explanation of other implementations and structural changes of the present invention:

[0049] 1. In the above embodiments, although the embodiments are given for the small three-string huqin, the present invention is not limited thereto, and can be applied to the medium three-string huqin and the large three-string huqin, etc. This is easily understood and accepted by those skilled in the art.

[0050] 2. In the above embodiments, the inner walls of the front support film 2 and the back support film 4 are both provided with double-tone beam structures and grooves. However, the present invention is not limited to this. The double-tone beams and grooves on the inner wall of the back support film 4 can be cancelled or changed to other structural forms. It is also feasible to only retain the technical measures set on the inner wall of the front support film 2, but the effect is slightly worse. For the resonance box of the three-string huqin, the front side is more important than the back side. The reason is that the strings are set on the front side, while the back side is not directly related to the strings, which is easy to understand for those skilled in the art.

[0051] 3. In the above embodiments, a double sound beam structure is provided on both the front and back inner walls. That is, two upper sound beams 6 are provided on the front support membrane 2, and two lower sound beams 7 are provided on the back support membrane 4. However, the present invention is not limited thereto, and the two upper sound beams 6 can be changed in form to four upper sound beams 6 used in parallel. For the present invention, although the four upper sound beams 6 and the two upper sound beams 6 are different in number and form, their essence is the same. Assuming that the two outer sound beams of the four upper sound beams 6 are close to the two inner sound beams, it can be equivalent to a double sound beam. Therefore, it can be considered that this change does not bring unexpected effects and should be understood as substantially equivalent. Similarly, the double sound beam structure on the back support membrane 4 should also include such a change. In the present invention, the double sound beam includes the meaning of symmetrical arrangement of even number sound beams, so the symmetrical arrangement of six sound beams is also an equivalent change mode of the present invention. This is easy to understand for those skilled in the art.

[0052] 4. In the above embodiments, the first groove 8, the second groove 9, the third groove 10, and the fourth groove 11 are all one groove. However, the present invention is not limited thereto. In fact, the number of the first groove 8, the second groove 9, the third groove 10, and the fourth groove 11 can be one or more, and such a change can be determined according to actual conditions. In essence, the number of the first groove 8, the second groove 9, the third groove 10, and the fourth groove 11 is at least one.

[0053] 5. In the above embodiment, the three-string huqin uses three strings 21. However, the present invention is not limited thereto, and the number of strings 21 can be increased to four or even more, which is easily understood and accepted by those skilled in the art.

[0054] 6. In the above embodiment, the cross-sectional shape of the piano tube 5 is a gourd shape (see Figure 1 and Figure 4 ). However, the present invention is not limited thereto, and the shape of the three-string huqin barrel 5 can be designed to be circular, elliptical, rectangular, prismatic or polygonal, etc. This is easily understood and accepted by those skilled in the art.

[0055] 7. In the above embodiments, the front film 1, the front support film 2, the back film 3 and the back support film 4 are all made of cortical films. However, the present invention is not limited thereto, and the material of the artificial film that can be used includes but is not limited to plastic film. The cortical film and the artificial film can also be used in combination, for example, the front film 1 is made of cortical film, and the front support film 2 is made of plastic film.

[0056] 8. In the above embodiment, the two upper beams 6 are parallel and juxtaposed in the width direction of the resonance box (see Figure 4 ). The two lower beams 7 are parallel and juxtaposed (see Figure 4 ). However, the present invention is not limited thereto, and the two upper sound beams 6 do not necessarily have to be parallel, and the two lower sound beams 7 do not necessarily have to be parallel, but parallel arrangement is optimal, which is easily understood and accepted by those skilled in the art.

[0057] 9. In the above embodiments, a sound post 16 is provided at the intersection of the first groove 8 and the upper sound beam 6, one end of the sound post 16 is against the bottom of the first groove 8, and the other end is against the upper sound beam 6. However, the present invention is not limited to this, and the sound post 16 may not be provided. This is easily understood and accepted by those skilled in the art.

[0058] 10. In the above embodiment, an upper bridge hole 12 is provided on the upper sound beam 6, and a lower bridge hole 13 is provided on the lower sound beam 7. However, the present invention is not limited thereto, and the upper bridge hole 12 and the lower bridge hole 13 may not be provided, or even only one bridge hole may be provided. This is easily understood and accepted by those skilled in the art.

[0059] 11. In the above embodiment, an upper reinforcing plate 17 is fixedly mounted between the two upper sound beams 6, and a lower reinforcing plate 18 is fixedly mounted between the two lower sound beams 7. However, the present invention is not limited thereto, and a reinforcing plate may not be mounted, or an upper reinforcing plate 17 may be mounted only between the two upper sound beams 6, while no reinforcing plate is mounted between the two lower sound beams 7. It is also possible to mount only the lower reinforcing plate 18 between the two lower sound beams 7, while no reinforcing plate is mounted between the two upper sound beams 6. The upper reinforcing plate 17 and the lower reinforcing plate 18 can increase the strength of the middle area of ​​the panel and the bottom plate, especially between the upper sound beams and between the lower sound beams, and can increase the load when the two upper sound beams and the two lower sound beams resonate.

[0060] 12. In the above embodiments, when observing from the cross section of the resonance box, the two lower sound beams 7 and the two upper sound beams 6 are arranged in a corresponding position in the vertical direction. However, the present invention is not limited to this, and the arrangement may not be aligned, and the specific arrangement may be determined according to the timbre and sound quality of the resonance box. This is easily understood and accepted by those skilled in the art.

[0061] 13. In the above embodiment, the two upper sound beams 6 have the same shape and size (see Figure 7 The two lower sound beams 7 have the same shape and size (see Figure 8). However, the present invention is not limited thereto, and the shapes and sizes of the two upper sound beams 6 may be different, and the shapes and sizes of the two lower sound beams 7 may also be different. Specifically, it can be determined when the resonance box is debugging the timbre and sound quality. This is easily understood and accepted by those skilled in the art.

[0062] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A huqin with double beams and at least three strings, characterized in that: The instrument is composed of a bow and a body, wherein the body is mainly composed of a resonance box (26), a neck (19), a bridge (22) and at least three strings (21); The proximal end of the piano bar (19) is fixedly connected to one side of the resonance box (26), the distal end of the piano bar (19) serves as a first end, and the other side of the resonance box (26) serves as a second end. The resonance box (26) is provided with a front side and a back side. The bridge (22) stands on the front side of the resonance box (26). One end of each string (21) is fixed at the first end position, and the other end of each string (21) is fixed at the second end position. At the same time, each string (21) is mounted on the bridge (22); The resonance box (26) comprises a sound box (5), wherein the sound box (5) is formed into a cylindrical body by side panels along the side edges of the resonance box (26), and both ends of the cylindrical body are open, wherein the opening at one end is the front side, and the opening at the other end is the back side; a front membrane (1) is covered on the front opening of the sound box (5), and a back membrane (3) is covered on the back opening of the sound box (5); a front support membrane (2) is fixedly attached to the inner wall of the front membrane (1), the front support membrane (2) is located in the center of the front membrane (1), and a gap is left between the edges of the front support membrane (2) and the sound box (5); a back support membrane (4) is fixedly attached to the inner wall of the back membrane (3), the back support membrane (4) is located in the center of the back membrane (3), and a gap is left between the edges of the back support membrane (4) and the sound box (5); Two upper sound beams (6) are arranged in the resonance box (26), the upper sound beams (6) being long strip-shaped sound beam components, one side of the two upper sound beams (6) being tightly fixed to the inner wall of the front support membrane (2), the other side of the two upper sound beams (6) being suspended in the resonance box (26) relative to the back support membrane (4), the length direction of the two upper sound beams (6) being consistent with the length direction of the resonance box (26), and the two upper sound beams (6) being arranged side by side and spaced a certain distance apart in the width direction of the resonance box (26); A first groove (8) and a second groove (9) are provided on the inner wall of the front support membrane (2), the front support membrane (2) in the area corresponding to the first groove (8) and the second groove (9) is removed, the first groove (8) and the second groove (9) are cross-shaped on the inner wall of the front membrane (1) and are interpenetrating with each other, wherein the second groove (9) is located between the two upper sound beams (6), and the length direction of the second groove (9) is consistent with the length direction of the upper sound beam (6); the first groove (8) spans the two upper sound beams (6) in the width direction of the resonance box (26) and forms an upper transverse sound tunnel on the inner wall of the front membrane (1), and the second groove (9) forms an upper longitudinal sound tunnel on the inner wall of the front membrane (1), and the upper transverse sound tunnel and the upper longitudinal sound tunnel actually form an upper cross-shaped sound tunnel on the inner wall surface of the front side.

2. The huqin according to claim 1, characterized in that: Two lower sound beams (7) are arranged in the resonance box (26), the lower sound beams (7) being long strip-shaped sound beam components, one side of the two lower sound beams (7) being tightly fixed to the inner wall of the reverse support membrane (4), the other side of the two lower sound beams (7) being suspended in the resonance box (26) relative to the front support membrane (2), the length direction of the two lower sound beams (7) being consistent with the length direction of the resonance box (26), and the two lower sound beams (7) being arranged side by side and spaced a certain distance apart in the width direction of the resonance box (26); A third groove (10) and a fourth groove (11) are provided on the inner wall of the reverse support membrane (4); the front support membrane (2) in the area corresponding to the third groove (10) and the fourth groove (11) is removed; the third groove (10) and the fourth groove (11) are cross-shaped and mutually interpenetrating on the inner wall of the reverse membrane (3); the fourth groove (11) is located between the two lower sound beams (7); the length direction of the fourth groove (11) is consistent with the length direction of the lower sound beam (7); the third groove (10) spans the two lower sound beams (7) in the width direction of the resonance box (26) and forms a lower transverse sound tunnel on the inner wall of the reverse membrane (3); the fourth groove (11) forms a lower longitudinal sound tunnel on the inner wall of the reverse membrane (3).

3. The huqin according to claim 1, characterized in that: A sound post (16) is provided at the intersection of the first groove (8) and the upper sound beam (6), one end of the sound post (16) rests on the bottom of the first groove (8), and the other end rests on the upper sound beam (6).

4. The huqin according to claim 2, characterized in that: An upper bridge hole (12) is provided on the upper sound beam (6), the upper bridge hole (12) is a hole on one side of the upper sound beam (6) and enables the upper sound beam (6) to form an upper bridge type sound beam structure, and the upper bridge hole (12) is mounted on the first groove (8); The lower sound beam (7) is provided with a lower bridge hole (13), the lower bridge hole (13) is a hole on one side of the lower sound beam (7) so that the lower sound beam (7) forms a lower bridge type sound beam structure, and the lower bridge hole (13) is mounted on the third groove (10).

5. The huqin according to claim 2, characterized in that: An upper reinforcing plate (17) is fixedly mounted between the two upper sound beams (6), and a lower reinforcing plate (18) is fixedly mounted between the two lower sound beams (7).

6. The huqin according to claim 1, characterized in that: The cross-sectional shape of the instrument tube (5) is gourd-shaped, circular, elliptical, rectangular, prismatic or polygonal.

7. The huqin according to claim 6, characterized in that: When the cross-sectional shape of the instrument body (5) is a gourd-shaped, an arc-shaped support plate (23) is provided in the resonance box (26), and the arc-shaped support plate (23) is supported on the gourd-shaped neck.

8. The huqin according to claim 2, characterized in that: The two upper sound beams (6) and the two lower sound beams (7) are arranged in a corresponding position in the upper and lower directions in the resonance box (26).

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