A double-beam konghou

Abstract

A double-beam konghou includes a resonance box of an arc-shaped hollow box, the box of the resonance box is mainly composed of a first upper sound board, a second upper sound board and a lower sound board, and the cross section of the box is a semicircular hollow cavity, characterized in that: double beams are fixedly arranged in parallel on the inner walls of the first upper sound board, the second upper sound board and the lower sound board; transverse and longitudinal grooves are opened on the inner walls of the first upper sound board, the second upper sound board and the lower sound board to form a sound tunnel; and a transverse beam is arranged in the transverse direction of the resonance box. This solution solves the problems that the high pitch area is not bright when playing the konghou in the past, the bass area is not thick and round enough, and the sound penetration is not strong.

Description

Technical Field

[0001] The invention relates to a plucked string instrument, in particular to a double-beam konghou. Background Art

[0002] The konghou is a traditional stringed instrument in ancient China. It was originally called "Kanhou" or "Konghou". In ancient times, it was used in court music and also spread among the people. In ancient times, there were three types of konghou: horizontal konghou, vertical konghou, and phoenix-head konghou. It was no longer popular in the late 14th century and gradually disappeared. Only some konghou patterns can be seen on murals and reliefs in the past. Judging from the vertical konghou depicted in a large number of ancient performance images and the remains of Chinese Tang Dynasty lacquer konghou and snail konghou preserved in the Shosoin Repository in Nara, Japan, its sound box (resonance box) is set on a curved wood that bends upward.

[0003] The modern konghou is a new instrument developed by combining the harp and the guzheng, or it can be said to be a reformed type of the harp, that is, a double-row string harp. With the development of the modern konghou, the word "konghou" now increasingly refers to the modern konghou. The modern konghou belongs to the ranks of the world's harps. In appearance, it has double rows of strings (36 strings per row), while the harp has a single row of strings. The modern konghou has a bridge (refer to the bridge of the guzheng), while the harp does not. The modern konghou has a phoenix looking back on the bridge, which is a representative symbol of Chinese traditional culture. The modern konghou has borrowed a lot from the harp in terms of playing techniques, and is now often used for solo, duet and accompaniment for singing and dancing. The sound box (resonance box) of modern konghou is also set on the upward curved wood. In terms of the range, large professional konghou has more than six octaves, even up to seven octaves, while ordinary konghou still has five octaves. When playing, the main soundboard vibrates, and the upper soundboard does not vibrate when playing because it is very thick. The timbre of the treble and bass areas of modern konghou is not good. Specifically, the treble area is not bright, and the bass area is not thick and round enough. The penetration of the piano sound is not strong, which needs to be further improved. The main reason is that the resonance box cannot meet the requirements of good resonance and vibration from the treble area to the bass area, that is, it cannot adapt to the resonance and vibration of the wide frequency changes in the treble area, the middle area and the bass area at the same time. Further research shows that there are many factors that affect the resonance and vibration in the resonance box. In addition to the material and thickness of the panel and the bottom plate, the internal structure and construction of the resonance box have a greater impact. However, the resonance box of the existing konghou is not designed properly, which is not conducive to exerting good sound wave resonance and vibration from the high pitch range to the low pitch range.

[0004] In view of this, how to improve the resonance box of the existing konghou, especially how to improve the internal structure and construction of the resonance box is a research topic of the present invention. Summary of the invention

[0005] The invention provides a double-beam konghou, and aims to solve the problem that the existing konghou resonance box cannot take into account the high, middle and low frequency ranges and have good resonance timbre and penetration at the same time.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a double-beam konghou, including a resonance box, the resonance box is an arc-shaped hollow box body, the arc-shaped hollow box body is mainly composed of a first upper sound board, a second upper sound board and a lower sound board, the cross section of the arc-shaped hollow box body is a semicircular hollow cavity, with the center point of the semicircular hollow cavity as a reference, the first upper sound board is located at the upper left and forms the arc top of the left half, the second upper sound board is located at the upper right and forms the arc top of the right half, and the lower sound board is located at the bottom and forms the flat bottom of the lower part. The innovation is:

[0007] Two lower sound beams are arranged in the resonance box. The lower sound beams are arc-shaped long strip sound beam components. The sides of the two lower sound beams are tightly fixed on the inner wall of the lower sound board. The length direction of the two lower sound beams is consistent with the length direction of the arc-shaped hollow box body. In the cross-sectional direction of the lower sound board, the two lower sound beams are parallel and separated by a distance.

[0008] A first groove is provided on the inner wall of the lower sound board, and the first groove is opened along the cross-sectional direction of the lower sound board; a second groove is provided on the inner wall of the lower sound board, and the second groove is opened along the length direction of the arc-shaped hollow box; the first groove and the second groove are cross-arranged on the inner wall of the lower sound board and are interconnected, wherein the second groove is located between the two lower sound beams, and the length direction of the second groove is consistent with the length direction of the lower sound beam; the first groove spans the two lower sound beams on the lower sound board and forms a lower transverse sound tunnel on the inner wall of the lower sound board, and the second groove forms a lower longitudinal sound tunnel on the inner wall of the lower sound board.

[0009] The relevant contents in the above technical solution are explained as follows:

[0010] 1. In the above scheme, the theme is "Konghou", and the innovation is concentrated on the "resonance box" of the Konghou, so other structures except the resonance box are not described. It can be considered that other structures of the Konghou of the present invention except the resonance box are realized by using the original Konghou technology.

[0011] 2. In the above scheme, the "resonance box" refers to the body of the harp mainly composed of the first upper soundboard, the second upper soundboard and the lower soundboard. The resonance box of the konghou is an arc-shaped hollow box, and the length direction of the arc-shaped hollow box refers to the direction extending along the arc center line of the arc-shaped hollow box. The cross-sectional direction of the first upper soundboard refers to the direction perpendicular to the arc center line. Similarly, the cross-sectional direction of the second upper soundboard and the cross-sectional direction of the lower soundboard are also perpendicular to the arc center line. The "inner wall" for the resonance box refers to the inner wall surface, for example, the inner wall of the first upper soundboard refers to the wall surface on the inner side of the first upper soundboard of the resonance box, and similarly, the inner walls of the second upper soundboard and the lower soundboard refer to the wall surfaces on the inner side of the second upper soundboard and the lower soundboard of the resonance box.

[0012] 3. In the above scheme, two first upper sound beams can be provided in the resonance box, the first upper sound beams are arc-shaped long strip sound beam components, the sides of the two first upper sound beams are tightly fixed on the inner wall of the first upper sound board, the length direction of the two first upper sound beams is consistent with the length direction of the arc-shaped hollow box, and the two first upper sound beams are parallel and separated by a distance in the cross-sectional direction of the first upper sound board.

[0013] A third groove is provided on the inner wall of the first upper sound board, and the third groove is opened along the cross-sectional direction of the first upper sound board; a fourth groove is provided on the inner wall of the first upper sound board, and the fourth groove is opened along the length direction of the arc-shaped hollow box; the third groove and the fourth groove are cross-arranged and interconnected on the inner wall of the first upper sound board, wherein the fourth groove is located between the two first upper sound beams, and the length direction of the fourth groove is consistent with the length direction of the first upper sound beam; the third groove spans the two first upper sound beams on the first upper sound board, and forms an upper horizontal sound tunnel on the left half on the inner wall of the first upper sound board, and the fourth groove forms an upper longitudinal sound tunnel on the left half on the inner wall of the first upper sound board.

[0014] Two second upper sound beams are arranged in the resonance box. The second upper sound beams are arc-shaped long strip sound beam components. The sides of the two second upper sound beams are tightly fixed on the inner wall of the second upper sound board. The length direction of the two second upper sound beams is consistent with the length direction of the arc-shaped hollow box body. In the cross-sectional direction of the second upper sound board, the two second upper sound beams are arranged side by side and separated by a distance.

[0015] A fifth groove is provided on the inner wall of the second upper sound board, and the fifth groove is opened along the cross-sectional direction of the second upper sound board; a sixth groove is provided on the inner wall of the second upper sound board, and the sixth groove is opened along the length direction of the arc-shaped hollow box; the fifth groove and the sixth groove are cross-arranged and interconnected on the inner wall of the second upper sound board, wherein the sixth groove is located between the two second upper sound beams, and the length direction of the sixth groove is consistent with the length direction of the second upper sound beams; the fifth groove spans the two second upper sound beams on the second upper sound board, and forms an upper horizontal sound tunnel on the right half on the inner wall of the second upper sound board, and the sixth groove forms an upper longitudinal sound tunnel on the right half on the inner wall of the second upper sound board.

[0016] 4. In the above scheme, a transverse sound beam can be provided in the resonance box, and the transverse sound beam is in the shape of a plate, supported between the first upper sound board and the lower sound board and between the second upper sound board and the lower sound board, and positioned at the positions of the third groove and the first groove and the fifth groove and the first groove; the transverse sound beam is symmetrical with respect to the central plane of the semicircular hollow cavity, wherein in the left half position, the top of the transverse sound beam is fixedly connected to the first upper sound board, and the bottom of the transverse sound beam is fixedly connected to the lower sound board; in the right half position, the top of the transverse sound beam is fixedly connected to the second upper sound board, and the bottom of the transverse sound beam is fixedly connected to the lower sound board.

[0017] 5. In the above scheme, the first upper sound beam is provided with a first upper bridge hole, the first upper bridge hole is a hole on one side of the first upper sound beam and forms an upper bridge sound beam structure for the first upper sound beam, and the first upper bridge hole is mounted on the third groove. The second upper sound beam is provided with a second upper bridge hole, the second upper bridge hole is a hole on one side of the second upper sound beam and forms an upper bridge sound beam structure for the second upper sound beam, and the second upper bridge hole is mounted on the fifth groove. The lower sound beam is provided with a lower bridge hole, the lower bridge hole is a hole on one side of the lower sound beam and forms a lower bridge sound beam structure for the lower sound beam, and the lower bridge hole is mounted on the first groove.

[0018] 6. In the above solution, a first reinforcing plate is fixedly mounted between the two first upper sound beams; and a second reinforcing plate is fixedly mounted between the two second upper sound beams.

[0019] 7. In the above scheme, a through hole is provided in the center of the transverse sound beam. A avoidance is provided on the transverse sound beam at a position corresponding to the first upper sound beam or / and the second upper sound beam. A first notch is provided on the side of the transverse sound beam corresponding to the first upper sound board or / and the second upper sound board, and a first hole is formed between the first notch and the inner wall of the first upper sound board or the second upper sound board in the assembled state; a second notch is provided on the side of the transverse sound beam corresponding to the lower sound board, and a second hole is formed between the second notch and the inner wall of the lower sound board in the assembled state.

[0020] 8. In the above solution, it is best if the first groove, the second groove, the third groove, the fourth groove, the fifth groove and the sixth groove are all arc-shaped grooves.

[0021] The design principle and concept of the present invention are: for the konghou, there are many factors that affect its timbre and penetration, such as the material, thickness, internal structure, etc. of the resonance box. In order to solve the problem that the existing konghou resonance box cannot take into account the high, medium and low frequency ranges while having good resonance timbre and penetration, the present invention has been thoroughly improved mainly from the perspective of the resonance box, especially the internal structure of the resonance box. It is specifically embodied in the following aspects: First, two lower sound beams are fixed and arranged in parallel on the inner wall of the lower sound board; second, horizontal and vertical grooves (i.e., the first groove and the second groove) are opened on the inner wall of the lower sound board to form a lower horizontal sound tunnel and a lower vertical sound tunnel. The present invention aims at the problem that the existing konghou has poor high pitch, not enough mellow and round bass, and weak penetration of the sound, and conducts in-depth discussion and research on the resonance box of the konghou, especially the resonance box structure and the sound generation mechanism, and finds out that the main reason for the poor timbre and volume of the existing konghou in the high and low pitches and the insufficient penetration is due to the unreasonable design of the resonance box, which causes the sound waves to fail to produce good resonance and vibration in the resonance box during performance. Accordingly, the inventor breaks the constraints of the traditional konghou resonance box design in the past, and boldly proposes the improved design scheme of the present invention, which solves the problem that the konghou has poor high pitch, not enough mellow bass, and weak penetration of the sound from the perspective of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantive characteristics and significant technical progress, and has achieved obvious technical effects.

[0022] Due to the application of the above technical solution, the present invention has the following advantages and effects compared with the prior art (described in detail with reference to the best implementation mode, i.e., the embodiments of the present invention):

[0023] 1. The present invention is provided with a double sound beam structure (i.e., two first upper sound beams, two second upper sound beams, and two lower sound beams) on the first upper sound board, the second upper sound board, and the lower sound board. 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, which strengthens the strength of the central area of ​​the first upper sound board, the second upper sound board, and the lower sound board, and plays an important role in improving the timbre and penetration of the bass area. On the other hand, the strength of the central area of ​​the first upper sound board, the second upper sound board, and the lower sound board is strengthened, which relatively changes the thickness difference between the central area and the surrounding edge areas of the resonance box, and also has a good effect on improving the timbre and penetration of the treble area.

[0024] 2. The present invention is directed to the resonance box, and horizontal and vertical grooves (i.e., the third groove to the second groove) are respectively opened on the inner walls of the first upper sound board, the second upper sound board, and the lower sound board. These grooves form horizontal sound tunnels and vertical sound tunnels (i.e., sound tunnels) on their respective board walls. 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. The string vibration is collected by the central area where the sound tunnels intersect, and is quickly transmitted to the surrounding areas of the resonance box through these sound tunnels, which plays a key role in improving the timbre and penetration of the treble area, and also plays a good role in improving the timbre and penetration of the bass area.

[0025] 3. The present invention designs the sound beam into a bridge-type sound beam structure, especially a bridge 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 transmitting vibration through the sound tunnel and more conducive to resonance of the resonance box.

[0026] 4. The present invention adopts a combination design of transverse sound beams, longitudinal sound beams and grooves on the inner walls of the first upper soundboard, the second upper soundboard and the lower soundboard, which actually divides the space corresponding to the inner side of the first upper soundboard into eight resonance areas, divides the space corresponding to the inner side of the second upper soundboard into eight resonance areas, and divides the space corresponding to the inner side of the lower soundboard into eight resonance areas, totaling 24 resonance areas. When the konghou is played, the vibration of the strings is first transmitted to the central area where the sound tunnels intersect, and then transmitted to these 24 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. Before the improvement, only five sound wave quantities can be generated when the konghou is played, that is, the space corresponding to the inner side of the first upper soundboard is a resonance area, the space corresponding to the inner side of the second upper soundboard is a resonance area, and the space corresponding to the inner side of the lower soundboard is a resonance area, totaling three resonance areas. Each resonance area generates a sound wave quantity, plus a string wave quantity, plus a percussion wave quantity, totaling five sound wave quantities. The improved konghou of the present invention can generate 26 sound waves when playing, among which 24 resonance areas generate 24 sound waves, plus one string wave, plus one percussion wave, totaling 26 sound waves. The sound wave amount is the number of sound waves. For a plucked string instrument in a specific resonance box, in addition to one string wave and one percussion wave, it mainly depends on the number of resonance areas in the resonance box. Usually, each resonance area of ​​the instrument generates one sound wave when playing, and the number of sound waves generated depends on the number of resonance areas. In addition, the sound wave amount directly affects the timbre, penetration and volume of the instrument. Therefore, the design of the present invention can significantly improve the timbre of the treble and bass areas, and increase the penetration of the treble and bass areas.

[0027] 5. The through holes on the transverse sound beam of the present invention and the holes between the transverse sound beam and the first upper sound board, the second upper sound board and the lower sound board are channels between the resonance areas in the resonance box. This channel design is conducive to the mutual transmission of sound waves, resonance and vibration.

[0028] 6. The present invention fixes a reinforcing plate (i.e., the first reinforcing plate and the second reinforcing plate) between two adjacent first upper sound beams and the second upper sound beams, which can increase the strength of the middle area of ​​the first upper sound board and the second upper sound board, especially between the sound beams, and can increase the load when the sound beams resonate, further improving the timbre and penetration of the bass area. On the other hand, the central area of ​​the resonance box sound board is strengthened, and the strength gap with the edge areas around the resonance box sound board is relatively widened, which is also conducive to improving the timbre and penetration of the treble area.

[0029] 7. The third groove to the second groove of the present invention are all arc-shaped grooves, which can minimize the thickness mutation of the first upper sound board, the second upper sound board and the lower sound board, thereby affecting the resonance and vibration of the resonance box.

[0030] 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 sound beam structure and opening a groove on the inner wall of the lower sound board are more important than adopting equivalent measures on the inner walls of the first upper sound board and the second upper sound board, and the effect and effect are relatively better. The reason is that the lower sound board is connected to the strings, while the first upper sound board and the second upper sound board are not directly connected to the strings. Therefore, setting a double sound beam structure and opening a groove on the inner wall of the lower sound board are the key to solving the technical problem of the present invention, and setting a double sound beam structure and opening a groove on the inner walls of the first upper sound board and the second upper sound board are icing on the cake for the present invention, which is easy to understand by those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Attached Figure 1 Schematic diagram of the structure of a konghou according to an embodiment of the present invention;

[0032] Attached Figure 2 for Figure 1 AA cross-sectional view in;

[0033] Attached Figure 3 for Figure 2 A cross-sectional view of the resonance box in FIG.

[0034] Attached Figure 4 This is a front view of a konghou horizontal sound beam according to an embodiment of the present invention;

[0035] Attached Figure 5 It is a left side view of the horizontal sound beam of the konghou according to an embodiment of the present invention;

[0036] Attached Figure 6 for Figure 1BB cross-section diagram in;

[0037] Attached Figure 7 for Figure 1 CC cross-section diagram in;

[0038] Attached Figure 8 This is a front view of the lower sound beam of a konghou according to an embodiment of the present invention;

[0039] Attached Fig. 9 It is a left view of the lower sound beam of the konghou according to an embodiment of the present invention;

[0040] Attached Fig.10 This is a front view of the first upper sound beam of the konghou according to an embodiment of the present invention;

[0041] Attached Fig.11 It is a left view of the first upper sound beam of the konghou according to an embodiment of the present invention;

[0042] Attached Fig.12 This is a front view of the second upper sound beam of the konghou according to an embodiment of the present invention;

[0043] Attached Fig.13 It is a left view of the second upper sound beam of the konghou according to an embodiment of the present invention.

[0044] In the above drawings: 1. First upper soundboard; 2. Second upper soundboard; 3. Lower soundboard; 4. First upper frame plate; 5. Second upper frame plate; 6. First lower frame plate; 7. Second lower frame plate; 8. Upper string fixing frame; 9. Lower string fixing frame; 10. Support rod; 11. First upper sound beam; 12. Second upper sound beam; 13. Lower sound beam; 14. First reinforcing plate; 15. Second reinforcing plate; 16. Third groove; 17. Fourth groove; 18. Fifth groove; 19. Sixth groove; 20. First groove; 21. Second groove; 22. String pin; 23. First upper bridge hole; 24. Second upper bridge hole; 25. Lower bridge hole; 26. Transverse sound beam; 27. Through hole; 28. Avoidance; 29. ​​First notch; 30. Second notch; 31. First hole; 32. Second hole; 33. Tuning screws. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0046] Embodiment: A double-beam konghou

[0047] like Figure 1-13 As shown, the konghou is mainly composed of a resonance box (sound box), a frame and strings. The frame is composed of an upper string hanging fixing frame 8 (see Figure 2 and Figure 3 )、lower hanging string fixing frame 9 (see Figure 1 and Figure 6 ) and support rod 10 (see Figure 1 and Figure 7) is fixedly connected. The upper string fixing frame 8 is provided with string nails ( Figure 2 and Figure 3 The lower string fixing frame 9 is provided with a tuning screw 33 (see FIG. Figure 1 ), the lower sound beam 13 is also provided with string nails 22 (see Figure 2 ), one end of the string is fixed on the string nail of the upper string hanging fixing frame 8 (not shown in the figure), and then passes through the string nail 22 on the lower sound beam 13 (see Figure 2 ), and finally fixed on the tuning screw 33 of the lower hanging string fixing frame 9.

[0048] The resonance box (sound box) of the konghou is arranged on the upper string hanging fixing frame 8 (see Figure 1 ), the resonance box is a curved hollow box (see Figure 1 ), the arc-shaped hollow box is composed of a first upper sound board 1, a second upper sound board 2, a lower sound board 3, a first upper frame board 4, a second upper frame board 5, a first lower frame board 6 and a second lower frame board 7 (see Figure 3 ), wherein the first upper frame plate 4 and the second upper frame plate 5 serve as the supporting framework at the center of the top of the resonance box, and a long strip opening is provided at the top of the resonance box, and the first upper frame plate 4 and the second upper frame plate 5 are provided on both sides of the long strip opening at the top of the resonance box (see Figure 2 and Figure 3 ), the upper string hanging fixing frame 8 is located in the long strip opening, and the upper string hanging fixing frame 8 is between the first upper frame plate 4 and the second upper frame plate 5, and there is a gap between them (see Figure 2 and Figure 3 The first lower frame plate 6 and the second lower frame plate 7 serve as the supporting frames on both sides of the bottom of the resonance box (see Figure 2 and Figure 3 The arc-shaped hollow box is composed of the first upper sound board 1, the second upper sound board 2, and the lower sound board 3 connected by the support frame at the top center and the bottom sides (see Figure 3 The cross section of the arc-shaped hollow box is a semicircular hollow cavity (see Figure 2 and Figure 3 ), with the center point of the semicircular hollow cavity as the reference, the first upper soundboard 1 is located at the upper left and forms the arc top of the left half (see Figure 3 ), the second upper soundboard 2 is located at the upper right and forms the arc top of the right half (see Figure 3 ), the lower soundboard 3 is located below and forms the lower flat bottom (see Figure 3 ).

[0049] Two lower sound beams 13 (see Figure 1 and Figure 2 ), the lower sound beam 13 is an arc-shaped long strip sound beam component, and the side portions of the two lower sound beams 13 are tightly fixed on the inner wall of the lower sound board 3 (see Figure 1 ), the length direction of the two lower sound beams 13 is consistent with the length direction of the arc-shaped hollow box (see Figure 1 ), in the cross-sectional direction of the lower sound board 3, the two lower sound beams 13 are arranged side by side and separated by a distance (see Figure 2 The lower sound beam 13 is provided with a lower bridge hole 25 (see Figure 8 ), the lower bridge hole 25 is a hole on one side of the lower sound beam 13 so that the lower sound beam 13 forms a lower bridge type sound beam structure, and the lower bridge hole 25 is mounted on the first groove 20 (see Figure 2 and Figure 3 ).

[0050] Three first grooves 20 (see Figure 3 ), the three first grooves 20 are all opened along the cross-sectional direction of the lower sound board 3, and the three first grooves 20 are arranged at intervals in the length direction of the arc-shaped hollow box (see Figure 1 A second groove 21 is provided on the inner wall of the lower sound board 3 (see Figure 3 ), the second groove 21 is opened along the length direction of the arc-shaped hollow box. The three first grooves 20 and the second groove 21 intersect and penetrate each other on the inner wall of the lower sound board 3 (see Figure 3 ), wherein the second groove 21 is located between the two lower sound beams 13 (see Figure 2 ), the length direction of the second groove 21 is consistent with the length direction of the lower sound beam 13. The three first grooves 20 cross the two lower sound beams 13 on the lower sound board 3 and form three lower transverse sound tunnels on the inner wall of the lower sound board 3 (see Figure 3 ), the second groove 21 forms a lower longitudinal sound tunnel on the inner wall of the lower sound board 3 (see Figure 3 ).

[0051] The length of the first groove 20 is smaller than the length of the lower sound board 3 at the corresponding position of the first groove 20, and a smooth transition surface is provided between the two ends of the first groove 20 and the inner wall of the lower sound board 3 (see Figure 3 The length of the second groove 21 is smaller than the length of the lower sound board 3 at the corresponding position of the second groove 21, and a smooth transition surface is provided between the two ends of the second groove 21 and the inner wall of the lower sound board 3 (see Figure 3 ).

[0052] Two first upper sound beams 11 are arranged in the resonance box. The first upper sound beams 11 are arc-shaped long strip sound beam components ( Fig.10 and Fig.11 ), the sides of the two first upper sound beams 11 are closely fixed to the inner wall of the first upper sound board 1 (see Figure 2 ), the length direction of the two first upper sound beams 11 is consistent with the length direction of the arc-shaped hollow box (because the first upper sound beam 11 and the second upper sound beam 12 are symmetrically arranged in the resonance box, see Figure 2 , so see Figure 1The first upper sound beam 12 is arranged in parallel and spaced apart in the cross-sectional direction of the first upper sound board 1. The first upper sound beam 11 is provided with a first upper bridge hole 23 (see Fig.10 ), the first upper bridge hole 23 is a hole on one side of the first upper sound beam 11 so that the first upper sound beam 11 forms an upper bridge type sound beam structure, and the first upper bridge hole 23 is mounted on the third groove 16 (see Figure 2 and Figure 3 ).

[0053] Three third grooves 16 are provided on the inner wall of the first upper sound board 1 (see Figure 3 ), the three third grooves 16 are all opened along the cross-sectional direction of the first upper sound board 1, and the three third grooves 16 are arranged at intervals in the length direction of the arc-shaped hollow box (because the third groove 16 and the fifth groove 18 are symmetrically arranged in the resonance box, see Figure 3 , so you can refer to Figure 1 A fourth groove 17 is provided on the inner wall of the first upper sound board 1 (see Figure 3 ), the fourth groove 17 is opened along the length direction of the arc-shaped hollow box (since the fourth groove 17 and the sixth groove 19 are symmetrically arranged in the resonance box, see Figure 3 , so you can refer to Figure 1 The three third grooves 16 and the one fourth groove 17 intersect and penetrate each other on the inner wall of the first upper sound board 1 (see Figure 3 ), wherein the fourth groove 17 is located between the two first upper sound beams 11 (reference Figure 1 The length direction of the fourth groove 17 is consistent with the length direction of the first upper sound beam 11. The three third grooves 16 cross the two first upper sound beams 11 on the first upper sound board 1 and form three upper transverse sound tunnels on the inner wall of the first upper sound board 1 (see Figure 3 ), the fourth groove 17 forms a left half of the upper longitudinal sound tunnel on the inner wall of the first upper sound board 1 (see Figure 3 ).

[0054] The length of the third groove 16 is less than the length of the first upper sound board 1 at the corresponding position of the third groove 16, and a smooth transition surface is provided between the two ends of the third groove 16 and the inner wall of the first upper sound board 1 (see Figure 3 The length of the fourth groove 17 is less than the length of the first upper sound board 1 at the corresponding position of the fourth groove 17, and a smooth transition surface is provided between the two ends of the fourth groove 17 and the inner wall of the first upper sound board 1 (see Figure 3 ).

[0055] Two second upper sound beams 12 (see Figure 1 and Figure 2), the second upper sound beam 12 is an arc-shaped long strip sound beam component (see Fig.12 and Fig.13 ), the sides of the two second upper sound beams 12 are closely fixed to the inner wall of the second upper sound board 2 (see Figure 2 ), the length direction of the two second upper sound beams 12 is consistent with the length direction of the arc-shaped hollow box (see Figure 1 ), in the cross-sectional direction of the second upper sound board 2, the two second upper sound beams 12 are parallel and arranged side by side and separated by a distance (see Figure 1 The second upper sound beam 12 is provided with a second upper bridge hole 24 (see Fig.12 ), the second upper bridge hole 24 is a hole on one side of the second upper sound beam 12 so that the second upper sound beam 12 forms an upper bridge type sound beam structure, and the second upper bridge hole 24 is mounted on the fifth groove 18.

[0056] Three fifth grooves 18 are provided on the inner wall of the second upper sound board 2 (see Figure 1 ), the three fifth grooves 18 are all opened along the cross-sectional direction of the second upper sound board 2, and the three fifth grooves 18 are arranged at intervals in the length direction of the arc-shaped hollow box (see Figure 1 A sixth groove 19 is provided on the inner wall of the second upper sound board 2 (see Figure 1 ), the sixth groove 19 is opened along the length direction of the arc-shaped hollow box. The three fifth grooves 18 and the sixth groove 19 intersect and penetrate each other on the inner wall of the second upper sound board 2 (see Figure 3 ), wherein the sixth groove 19 is located between the two second upper sound beams 12, and the length direction of the sixth groove 19 is consistent with the length direction of the second upper sound beam 12 (see Figure 1 The three fifth grooves 18 cross the two second upper sound beams 12 on the second upper sound board 2 and form three upper transverse sound tunnels of the right half on the inner wall of the second upper sound board 2 (see Figure 3 ), the sixth groove 19 forms a right half of the upper longitudinal sound tunnel on the inner wall of the second upper sound board 2 (see Figure 3 ).

[0057] The length of the fifth groove 18 is less than the length of the second upper sound board 2 at the corresponding position of the fifth groove 18, and a smooth transition surface is provided between the two ends of the fifth groove 18 and the inner wall of the second upper sound board 2 (see Figure 1 The length of the sixth groove 19 is less than the length of the second upper sound board 2 at the corresponding position of the sixth groove 19, and a smooth transition surface is provided between the two ends of the sixth groove 19 and the inner wall of the second upper sound board 2 (see Figure 1 ).

[0058] A transverse beam 26 is provided in the resonance box (see Figure 1 and Figure 2 ), the transverse beam 26 is in the form of a plate (see Figure 4and Figure 5 ), the transverse beam 26 is supported between the first upper soundboard 1 and the lower soundboard 3 and between the second upper soundboard 2 and the lower soundboard 3 (see Figure 2 ), and is positioned at the positions of the third groove 16 and the first groove 20 and the fifth groove 18 and the first groove 20 (see Figure 1 The transverse beam 26 is bilaterally symmetrical with respect to the central plane of the semicircular hollow cavity, wherein the top of the transverse beam 26 is fixedly connected to the first upper sound board 1 in the left half, and the bottom of the transverse beam 26 is fixedly connected to the lower sound board 3 (see Figure 2 ). In the right half position, the top of the transverse beam 26 is fixedly connected to the second upper soundboard 2, and the bottom of the transverse beam 26 is fixedly connected to the lower soundboard 3 (see Figure 2 A through hole 27 is provided in the center of the transverse beam 26 (see Figure 2 and Figure 4 The transverse beam 26 is provided with an escape opening 28 at a position corresponding to the first upper beam 11 and / or the second upper beam 12 (see Figure 4 The transverse sound beam 26 is provided with a first notch 29 on the side corresponding to the first upper sound board 1 or / and the second upper sound board 2 (see Figure 4 ), in the assembled state, a first hole 31 is formed between the first notch 29 and the inner wall of the first upper sound board 1 or the second upper sound board 2 (see Figure 2 The transverse sound beam 26 is provided with a second notch 30 on the side corresponding to the lower sound board 3 (see Figure 4 ), in the assembled state, a second hole 32 is formed between the second notch 30 and the inner wall of the lower sound board 3 (see Figure 2 ).

[0059] A first reinforcing plate 14 is fixedly mounted between the two first upper sound beams 11 (see Figure 2 A second reinforcing plate 15 is fixedly mounted between the two second upper sound beams 12 (see Figure 2 The third groove 16, the fourth groove 17, the fifth groove 18, the sixth groove 19, the first groove 20 and the second groove 21 are all arc grooves (see Figure 3 ).

[0060] The following is an explanation of other implementations and structural changes of the present invention:

[0061] 1. In the above embodiment, the two first upper sound beams 11 are arranged in parallel (see Figure 2 ). The two second upper beams 12 are arranged in parallel (see Figure 1 ). The two lower sound beams 13 are arranged in parallel (see Figure 2). However, the present invention is not limited thereto, and the two first upper sound beams 11 do not necessarily have to be parallel, and the two second upper sound beams 12 and the two lower sound beams 13 do not necessarily have to be parallel, but parallel arrangement is optimal, which is easily understood and accepted by those skilled in the art.

[0062] 2. In the above embodiments, the lower soundboard 3, the first upper soundboard 1 and the second upper soundboard 2 are all provided with double sound beam structures and grooves. However, the present invention is not limited to this. The double sound beams and grooves on the inner walls of the first upper soundboard 1 and the second upper soundboard 2 can be cancelled or changed to other structural forms. It is also feasible to only retain the technical measures provided on the inner wall of the lower soundboard 3, but the effect is slightly worse. For the resonance box of the konghou, the lower soundboard 3 is more important than the first upper soundboard 1 and the second upper soundboard 2. The reason is that the lower soundboard 3 is connected to the strings, while the first upper soundboard 1 and the second upper soundboard 2 are not directly related to the strings, which is easy to understand for those skilled in the art.

[0063] 3. In the above embodiments, a double sound beam structure is provided on the inner wall of the lower sound board 3, the first upper sound board 1 and the second upper sound board 2. However, the present invention is not limited thereto, and the two lower sound beams 13 can be changed in form to four lower sound beams 13 used in parallel. For the present invention, although the number and form of the four lower sound beams 13 and the two lower sound beams 13 are different, their essence is the same. Assuming that the two outer sound beams of the four lower sound beams 13 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 first upper sound board 1 and the second upper sound board 2 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.

[0064] 4. In the above embodiment, three first grooves 20 are provided on the inner wall of the lower sound board 3 (see Figure 3 ), three third grooves 16 are provided on the inner wall of the first upper sound board 1 (see Figure 3 ), three fifth grooves 18 are provided on the inner wall of the second upper sound board 2 (see Figure 1 ). However, the present invention is not limited thereto, and the number of the first groove 20, the third groove 16 and the fifth groove 18 can be one, two, four or five. Such changes can be determined according to actual conditions. In essence, the number of the first groove 20, the third groove 16 and the fifth groove 18 is at least one.

[0065] 5. In the above embodiment, the transverse beam 26 provided in the resonance box is bilaterally symmetrical with respect to the center plane of the second groove 21 (see Figure 2). However, the present invention is not limited thereto, and the two transverse beams 26 can be combined into an integral structure to achieve the above. Figure 2 The middle parts of the two transverse beams 26 are connected together as an integral transverse beam 26. In the above embodiment, the transverse beam 26 is decomposed into two left and right parts. This is easy to understand and accept by those skilled in the art.

[0066] 6. In the above embodiment, a first upper bridge hole 23 is provided on the first upper sound beam 11, a second upper bridge hole 24 is provided on the second upper sound beam 12, and a lower bridge hole 25 is provided on the lower sound beam 13. However, the present invention is not limited thereto, and the first upper bridge hole 23 may not be provided, and the second upper bridge hole 24 and the lower bridge hole 25 may not be provided, or even only one or two of the first upper sound beam 11, the second upper sound beam 12, and the lower sound beam 13 may be provided with bridge holes. This is a change that is easily understood and accepted by those skilled in the art.

[0067] 7. In the above embodiment, a first reinforcing plate 14 is fixedly mounted between the two first upper sound beams 11 (see Figure 2 ), a second reinforcing plate 15 is fixedly mounted between the two second upper sound beams 12 (see Figure 2 ). However, the present invention is not limited thereto, and the first reinforcing plate 14 may not be provided, and the two first upper sound beams 11 may be suspended in the resonance box. Similarly, the second reinforcing plate 15 may not be provided, and the two second upper sound beams 12 may be suspended in the resonance box.

[0068] 8. In the above embodiments, the third groove 16 to the second groove 21 are all arc-shaped grooves. However, the present invention is not limited thereto, and the grooves can be designed into other shapes, such as V-shaped, U-shaped, W-shaped and other concave structures, but the arc-shaped groove is the best design. This is easily understood and accepted by those skilled in the art.

[0069] 9. In the above embodiment, the two first upper sound beams 11 have the same shape and size (see Fig.10 ), the two second upper sound beams 12 have the same shape and size (see Fig.12 ), the two lower sound beams 13 have the same shape and size (see Figure 8 ). However, the present invention is not limited thereto. The shapes and sizes of the two first upper sound beams 11 may be different, the shapes and sizes of the two second upper sound beams 12 may be different, and the shapes and sizes of the two lower sound beams 13 may be different. Specifically, it can be determined when the resonance box is adjusted for timbre and sound quality. This is easily understood and accepted by those skilled in the art.

[0070] 10. In the above embodiments, the resonance box (sound box) of the konghou is an arc-shaped hollow box (see Figure 1), the arc-shaped hollow box is composed of a first upper sound board 1, a second upper sound board 2, a lower sound board 3, a first upper frame board 4, a second upper frame board 5, a first lower frame board 6 and a second lower frame board 7 (see Figure 3 ), wherein the first upper frame plate 4 and the second upper frame plate 5 serve as the support frame at the top center of the resonance box, and the first lower frame plate 6 and the second lower frame plate 7 serve as the support frame at both sides of the bottom of the resonance box (see Figure 2 and Figure 3 ). However, the present invention is not limited thereto, and the top central support frame and the bottom two side support frames may be omitted, and the first upper sound board 1, the second upper sound board 2 and the lower sound board 3 may be directly assembled into the resonance box (sound box) of the konghou. However, in the above embodiment, the top central support frame and the bottom two side support frames are used as the best design. This is easily understood and accepted by those skilled in the art.

[0071] 11. Since the innovations of the present invention are all concentrated on the resonance box, this embodiment will focus on describing the structure and construction of the konghou resonance box, while other structures can be considered to be implemented using existing technologies. The other structures of the konghou described at the beginning of this embodiment except the resonance box are not intended to be limitations of the present invention.

[0072] 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 double-beam konghou, comprising a resonance box, the resonance box being an arc-shaped hollow box body, the arc-shaped hollow box body being assembled by a first upper sound board (1), a second upper sound board (2) and a lower sound board (3), the cross section of the arc-shaped hollow box body being a semicircular hollow cavity, with the center point of the semicircular hollow cavity as a reference, the first upper sound board (1) being located at the upper left and forming the arc top of the left half, the second upper sound board (2) being located at the upper right and forming the arc top of the right half, and the lower sound board (3) being located at the lower part and forming the flat bottom of the lower part, characterized in that: Two lower sound beams (13) are arranged in the resonance box, the lower sound beams (13) are arc-shaped long strip sound beam components, the sides of the two lower sound beams (13) are tightly fixed on the inner wall of the lower sound board (3), the length direction of the two lower sound beams (13) is consistent with the length direction of the arc-shaped hollow box body, and the two lower sound beams (13) are arranged side by side and separated by a distance in the cross-sectional direction of the lower sound board (3); A first groove (20) is provided on the inner wall of the lower sound board (3), and the first groove (20) is opened along the cross-sectional direction of the lower sound board (3); a second groove (21) is provided on the inner wall of the lower sound board (3), and the second groove (21) is opened along the length direction of the arc-shaped hollow box; the first groove (20) and the second groove (21) are cross-arranged on the inner wall of the lower sound board (3) and are mutually connected, wherein the second groove (21) is located between two lower sound beams (13), and the length direction of the second groove (21) is consistent with the length direction of the lower sound beam (13); the first groove (20) crosses the two lower sound beams (13) on the lower sound board (3) and forms a lower transverse sound tunnel on the inner wall of the lower sound board (3), and the second groove (21) forms a lower longitudinal sound tunnel on the inner wall of the lower sound board (3).

2. The konghou according to claim 1, characterized in that: Two first upper sound beams (11) are arranged in the resonance box, the first upper sound beams (11) are arc-shaped long strip sound beam components, the sides of the two first upper sound beams (11) are tightly fixed on the inner wall of the first upper sound board (1), the length direction of the two first upper sound beams (11) is consistent with the length direction of the arc-shaped hollow box body, and the two first upper sound beams (11) are arranged side by side and separated by a distance in the cross-sectional direction of the first upper sound board (1); A third groove (16) is provided on the inner wall of the first upper sound board (1), and the third groove (16) is opened along the cross-sectional direction of the first upper sound board (1); a fourth groove (17) is provided on the inner wall of the first upper sound board (1), and the fourth groove (17) is opened along the length direction of the arc-shaped hollow box; the third groove (16) and the fourth groove (17) are cross-arranged on the inner wall of the first upper sound board (1) and are mutually connected, wherein the fourth groove (17) is located between the two first upper sound beams (11), and the length direction of the fourth groove (17) is consistent with the length direction of the first upper sound beam (11); the third groove (16) crosses the two first upper sound beams (11) on the first upper sound board (1) and forms an upper transverse sound tunnel of the left half on the inner wall of the first upper sound board (1), and the fourth groove (17) forms an upper longitudinal sound tunnel of the left half on the inner wall of the first upper sound board (1); Two second upper sound beams (12) are arranged in the resonance box, the second upper sound beams (12) are arc-shaped long strip sound beam components, the sides of the two second upper sound beams (12) are tightly fixed on the inner wall of the second upper sound board (2), the length direction of the two second upper sound beams (12) is consistent with the length direction of the arc-shaped hollow box body, and the two second upper sound beams (12) are arranged side by side and separated by a distance in the cross-sectional direction of the second upper sound board (2); A fifth groove (18) is provided on the inner wall of the second upper sound board (2), and the fifth groove (18) is opened along the cross-sectional direction of the second upper sound board (2); a sixth groove (19) is provided on the inner wall of the second upper sound board (2), and the sixth groove (19) is opened along the length direction of the arc-shaped hollow box; the fifth groove (18) and the sixth groove (19) are cross-arranged and mutually interpenetrating on the inner wall of the second upper sound board (2), wherein the sixth groove (19) is located between the two second upper sound beams (12), and the length direction of the sixth groove (19) is consistent with the length direction of the second upper sound beam (12); the fifth groove (18) crosses the two second upper sound beams (12) on the second upper sound board (2), and forms an upper transverse sound tunnel of the right half on the inner wall of the second upper sound board (2), and the sixth groove (19) forms an upper longitudinal sound tunnel of the right half on the inner wall of the second upper sound board (2).

3. The konghou according to claim 2, characterized in that: A transverse sound beam (26) is provided in the resonance box. The transverse sound beam (26) is in the shape of a plate. The transverse sound beam (26) is supported between the first upper sound board (1) and the lower sound board (3) and between the second upper sound board (2) and the lower sound board (3), and is positioned at the positions of the third groove (16) and the first groove (20) and the fifth groove (18) and the first groove (20); the transverse sound beam (26) is bilaterally symmetrical with respect to the central plane of the semicircular hollow cavity, wherein in the left half position, the top of the transverse sound beam (26) is fixedly connected to the first upper sound board (1), and the bottom of the transverse sound beam (26) is fixedly connected to the lower sound board (3); in the right half position, the top of the transverse sound beam (26) is fixedly connected to the second upper sound board (2), and the bottom of the transverse sound beam (26) is fixedly connected to the lower sound board (3).

4. The konghou according to claim 2, characterized in that: The first upper sound beam (11) is provided with a first upper bridge hole (23), the first upper bridge hole (23) is a hole on one side of the first upper sound beam (11) and enables the first upper sound beam (11) to form an upper bridge type sound beam structure, and the first upper bridge hole (23) is mounted on the third groove (16); The second upper sound beam (12) is provided with a second upper bridge hole (24), the second upper bridge hole (24) is a hole on one side of the second upper sound beam (12) and enables the second upper sound beam (12) to form an upper bridge type sound beam structure, and the second upper bridge hole (24) is mounted on the fifth groove (18); The lower sound beam (13) is provided with a lower bridge hole (25), the lower bridge hole (25) is a hole on one side of the lower sound beam (13) and enables the lower sound beam (13) to form a lower bridge type sound beam structure, and the lower bridge hole (25) is mounted on the first groove (20).

5. The konghou according to claim 2, characterized in that: A first reinforcing plate (14) is fixedly mounted between the two first upper sound beams (11); and a second reinforcing plate (15) is fixedly mounted between the two second upper sound beams (12).

6. The konghou according to claim 1, characterized in that: The length of the first groove (20) is smaller than the length of the lower sound board (3) at a position corresponding to the first groove (20), and smooth transition surfaces are provided between both ends of the first groove (20) and the inner wall of the lower sound board (3); the length of the second groove (21) is smaller than the length of the lower sound board (3) at a position corresponding to the second groove (21), and smooth transition surfaces are provided between both ends of the second groove (21) and the inner wall of the lower sound board (3).

7. The konghou according to claim 2, characterized in that: The length of the third groove (16) is smaller than the length of the first upper sound board (1) at a position corresponding to the third groove (16), and smooth transition surfaces are provided between both ends of the third groove (16) and the inner wall of the first upper sound board (1); the length of the fourth groove (17) is smaller than the length of the first upper sound board (1) at a position corresponding to the fourth groove (17), and smooth transition surfaces are provided between both ends of the fourth groove (17) and the inner wall of the first upper sound board (1).

8. The konghou according to claim 2, characterized in that: The length of the fifth groove (18) is smaller than the length of the second upper sound board (2) at a position corresponding to the fifth groove (18), and smooth transition surfaces are provided between the two ends of the fifth groove (18) and the inner wall of the second upper sound board (2); the length of the sixth groove (19) is smaller than the length of the second upper sound board (2) at a position corresponding to the sixth groove (19), and smooth transition surfaces are provided between the two ends of the sixth groove (19) and the inner wall of the second upper sound board (2).

9. The konghou according to claim 3, characterized in that: A through hole (27) is provided in the center of the transverse sound beam (26); a avoidance opening (28) is provided on the transverse sound beam (26) at a position corresponding to the first upper sound beam (11) or / and the second upper sound beam (12); a first notch (29) is provided on the side of the transverse sound beam (26) corresponding to the first upper sound board (1) or / and the second upper sound board (2); a first hole (31) is formed between the first notch (29) and the inner wall of the first upper sound board (1) or the second upper sound board (2) in an assembled state; and a second notch (30) is provided on the side of the transverse sound beam (26) corresponding to the lower sound board (3); a second hole (32) is formed between the second notch (30) and the inner wall of the lower sound board (3) in an assembled state.

10. The konghou according to claim 2, characterized in that: The first groove (20), the second groove (21), the third groove (16), the fourth groove (17), the fifth groove (18) and the sixth groove (19) are all arc-shaped grooves.

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