A double-beam ten-string harp

Abstract

A double-beam ten-stringed harp comprises a resonance box, the body of which is composed of a panel, a bottom plate and a side plate, and an intermediate plate is arranged in the box, the intermediate plate divides the internal space of the box into a first resonance chamber located at the upper part and a second resonance chamber located at the lower part, and is characterized in that: double beams are fixedly arranged in parallel on the inner wall of the panel, the upper and lower side walls of the intermediate plate and the inner wall of the bottom plate; transverse and longitudinal grooves are opened on the inner wall of the panel, the upper and lower side walls of the intermediate plate and the inner wall of the bottom plate to form a sound tunnel; transverse beams are arranged in the transverse direction in the first resonance chamber and the second resonance chamber. This solution solves the problems that the high pitch area is not bright when playing the ten-stringed harp, 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 ten-stringed harp. Background Art

[0002] The ten-stringed zither is made of wood, which is carved with some help. It consists of the body and a movable bottom plate. The body is divided into two parts: the sound box (resonance box) and the tail plate. The sound box (resonance box) is nearly a rectangular block, with the movable bottom plate touching the ground. The sound box (resonance box) is hollow inside, with two holes on the bottom surface connecting to the inside. There are ten string holes at the head end, and the mountain has traces of string binding. The arc-shaped tail plate is slightly upturned and suspended in the air, and there are also traces of string binding on the tail end. There is a string peg under the board. The surface of the zither is raised, with intaglio string patterns, and the whole body is painted with black lacquer, with a soft and smooth luster and a plain surface.

[0003] The ten-string harp is a series of ancient plucked instruments, which are divided into three types: the middle harp, the second largest harp and the largest harp. Among them, the middle harp has ten strings and a range of five octaves; the second largest harp has fifteen strings and a range of six octaves; the largest harp has twenty strings and a range of seven octaves.

[0004] The problem with the ten-string guitar is that the timbre of the treble and bass areas is not good. Specifically, the treble area is not bright, and the bass area is not thick and round enough. The penetration of the ten-string guitar sound is not strong and needs to be further improved. The main reason is that the resonance box of the ten-string guitar 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 ten-string guitar is not conducive to the good sound wave resonance and vibration from the treble area to the bass area due to unreasonable design.

[0005] In view of this, how to improve the resonance box of the existing ten-stringed harp, 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

[0006] The invention provides a double-beam ten-string harp, and aims to solve the problem that the resonance box of the existing ten-string harp cannot take into account the high, middle and low bass regions and have good resonance timbre and penetration.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a double-beam ten-string harp, including a resonance box, the box body of the resonance box is composed of a panel, a bottom plate, and a side plate, the bottom plate is formed by the front bottom plate and the rear bottom plate being staggered and connected in the height direction of the box body, wherein the front bottom plate is lower than the rear bottom plate in the height direction of the box body; an intermediate plate is arranged in the box body, the intermediate plate is located at a position corresponding to the front bottom plate in the front and rear directions of the box body, and divides the internal space of the box body between the front bottom plate and the panel into a first resonance chamber located at the upper part and a second resonance chamber located at the lower part, wherein the first resonance chamber is jointly constituted by the space between the intermediate plate and the panel and the space between the rear bottom plate and the panel, and the second resonance chamber is constituted by the space between the intermediate plate and the front bottom plate; a first sound hole is arranged on the intermediate plate, and the first resonance chamber is connected with the second resonance chamber through the first sound hole, and the innovation thereof lies in:

[0008] Two first upper sound beams are provided in the first resonance chamber, the first upper sound beams are long strip-shaped sound beam components, one side of the two first upper sound beams is tightly fixed on the inner wall of the panel, and the other sides of the two first upper sound beams are suspended in the first resonance chamber, the length direction of the two first upper sound beams is consistent with the length direction of the resonance box, and the two first upper sound beams are parallel and separated by a distance in the width direction of the resonance box.

[0009] A first groove is provided on the inner wall of the panel corresponding to the first resonance cavity, and the first groove is opened along the width direction of the resonance box; a second groove is provided on the inner wall of the panel corresponding to the first resonance cavity, and the second groove is opened along the length direction of the resonance box; the first groove and the second groove are cross-arranged on the inner wall of the panel and penetrate each other, wherein the second groove is located between the two first upper sound beams, and the length direction of the second groove is consistent with the length direction of the first upper sound beam; the first groove spans the two first upper sound beams in the width direction of the resonance box and forms an upper transverse sound tunnel on the inner wall of the panel, and the second groove forms an upper longitudinal sound tunnel on the inner wall of the panel.

[0010] Two second upper sound beams are arranged in the second resonance chamber, and the second upper sound beams are long strip-shaped sound beam components. One side of the two second upper sound beams is tightly fixed on the lower wall surface of the middle plate, and the other sides of the two second upper sound beams are suspended in the second resonance chamber. The length direction of the two second upper sound beams is consistent with the length direction of the resonance box, and the two second upper sound beams are parallel and separated by a distance in the width direction of the resonance box.

[0011] A third groove and a fourth groove are provided on the lower side wall surface of the middle plate corresponding to the second resonance chamber, wherein the third groove is opened along the width direction of the resonance box, and the fourth groove is opened along the length direction of the resonance box, and the third groove and the fourth groove are cross-arranged and interconnected on the lower side wall surface of the middle plate, wherein the fourth groove is located between the two second upper sound beams, and the length direction of the fourth groove is consistent with the length direction of the second upper sound beams, the third groove spans the two second upper sound beams in the width direction of the resonance box, and forms an upper transverse sound tunnel on the lower side wall surface of the middle plate, and the fourth groove forms an upper longitudinal sound tunnel on the lower side wall surface of the middle plate.

[0012] The relevant contents in the above technical solution are explained as follows:

[0013] 1. In the above scheme, the theme is "ten-string harp", and the innovation is concentrated on the "resonance box" of the ten-string harp, so other structures except the resonance box are not described. It can be considered that other structures of the ten-string harp of the present invention except the resonance box are realized by using the original ten-string harp technology.

[0014] 2. In the above scheme, the "resonance box" refers to the body of the instrument composed of the top plate, bottom plate and side plates. The length direction of the resonance box of the ten-string instrument refers to the direction approximately 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 top plate refers to the wall surface on the inner side of the resonance box top plate, and the inner wall of the front bottom plate and the rear bottom plate refers to the wall surface on the inner side of the front bottom plate and the rear bottom plate of the resonance box.

[0015] 3. In the above scheme, two first lower sound beams can be provided in the first resonance chamber, the first lower sound beams are long strip-shaped sound beam components, one side of the two first lower sound beams are tightly fixed on the upper wall surface of the middle plate, and the other side of the two first lower sound beams are suspended in the first resonance chamber relative to the panel, the length direction of the two first lower sound beams is consistent with the length direction of the resonance box, and the two first lower sound beams are parallel and separated by a distance when viewed in the width direction of the resonance box.

[0016] A fifth groove and a sixth groove are provided on the upper wall surface of the middle plate corresponding to the first resonance chamber, wherein the fifth groove is opened along the width direction of the resonance box, and the sixth groove is opened along the length direction of the resonance box, the fifth groove and the sixth groove are cross-arranged and interconnected on the upper wall surface of the middle plate, wherein the sixth groove is located between the two first lower sound beams, the length direction of the sixth groove is consistent with the length direction of the first lower sound beam, the fifth groove spans the two first lower sound beams in the width direction of the resonance box, and forms a lower transverse sound tunnel on the upper wall surface of the middle plate, and the sixth groove forms a lower longitudinal sound tunnel on the upper wall surface of the middle plate.

[0017] Two second lower sound beams are arranged in the first resonance chamber, and the second lower sound beams are long strip-shaped sound beam components. One side of the two second lower sound beams is tightly fixed on the inner wall of the rear bottom plate, and the other side of the two second lower sound beams is suspended in the first resonance chamber relative to the panel. The length direction of the two second 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 second lower sound beams are parallel and separated by a distance.

[0018] A seventh groove and an eighth groove are provided on the inner wall of the rear bottom plate corresponding to the first resonance chamber, wherein the seventh groove is opened along the width direction of the resonance box, and the eighth groove is opened along the length direction of the resonance box, the seventh groove and the eighth groove are cross-arranged and interconnected on the inner wall of the rear bottom plate, wherein the eighth groove is located between the two second lower sound beams, the length direction of the eighth groove is consistent with the length direction of the second lower sound beams, the seventh groove spans the two second lower sound beams in the width direction of the resonance box, and forms a lower horizontal sound tunnel on the inner wall of the rear bottom plate, and the eighth groove forms a lower longitudinal sound tunnel on the inner wall of the rear bottom plate.

[0019] Two third lower sound beams are arranged in the second resonance chamber, and the third lower sound beams are long strip-shaped sound beam components. One side of the two third lower sound beams is tightly fixed on the inner wall of the front bottom plate, and the other side of the two third lower sound beams is suspended in the second resonance chamber. The length direction of the two third lower sound beams is consistent with the length direction of the resonance box, and the two third lower sound beams are parallel and separated by a distance in the width direction of the resonance box.

[0020] A ninth groove and a tenth groove are provided on the inner wall of the front bottom plate corresponding to the second resonance chamber, wherein the ninth groove is opened along the width direction of the resonance box, and the tenth groove is opened along the length direction of the resonance box, the ninth groove and the tenth groove are cross-arranged and interconnected on the inner wall of the front bottom plate, wherein the tenth groove is located between two third lower sound beams, the length direction of the tenth groove is consistent with the length direction of the third lower sound beams, the ninth groove spans the two third lower sound beams in the width direction of the resonance box, and forms a lower horizontal sound tunnel on the inner wall of the front bottom plate, and the tenth groove forms a lower longitudinal sound tunnel on the inner wall of the front bottom plate.

[0021] 4. In the above scheme, a large transverse sound beam can be provided in the first resonance chamber, and the large transverse sound beam is in the shape of a plate, wherein the large transverse sound beam is supported between the panel and the middle panel, and is fixed at the position of the first groove; the large transverse sound beam is symmetrical with respect to the center plane of the second groove, wherein the top of the large transverse sound beam is fixedly connected to the panel, the bottom of the large transverse sound beam is fixedly connected to the middle panel, and the side of the large transverse sound beam is fixedly connected to the side panel on the corresponding side.

[0022] A small transverse sound beam is provided in the second resonance chamber, and the small transverse sound beam is in the shape of a plate, wherein the small transverse sound beam supports between the middle plate and the front bottom plate, and is fixed at the position of the third groove; the small transverse sound beam is symmetrical with respect to the center plane of the fourth groove, wherein the top of the small transverse sound beam is fixedly connected to the middle plate, the bottom of the small transverse sound beam is fixedly connected to the front bottom plate, and the side of the small transverse sound beam is fixedly connected to the side plate on the corresponding side.

[0023] 5. In the above scheme, a first upper bridge hole can be provided on the first upper sound beam, 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 first groove. A second upper bridge hole can be provided on the second upper sound beam, 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 third groove. A first lower bridge hole can be provided on the first lower sound beam, the first lower bridge hole is a hole on one side of the first lower sound beam and forms a lower bridge sound beam structure for the first lower sound beam, and the first lower bridge hole is mounted on the fifth groove. A second lower bridge hole can be provided on the second lower sound beam, the second lower bridge hole is a hole on one side of the second lower sound beam and forms a lower bridge sound beam structure for the second lower sound beam, and the second lower bridge hole is mounted on the seventh groove. A third lower bridge hole can be provided on the third lower sound beam, the third lower bridge hole is a hole on one side of the third lower sound beam and enables the third lower sound beam to form a lower bridge type sound beam structure, and the third lower bridge hole is erected on the ninth groove.

[0024] 6. In the above scheme, a first upper reinforcing plate may be fixedly mounted between the two first upper sound beams, a first lower reinforcing plate may be fixedly mounted between the two first lower sound beams, and a second lower reinforcing plate may be fixedly mounted between the two second lower sound beams.

[0025] 7. In the above scheme, the first avoidance is provided on the large transverse sound beam corresponding to the first upper sound beam, and a pillar is provided in the first avoidance, and the pillar is fixedly connected to the large transverse sound beam. A second avoidance is provided on the large transverse sound beam corresponding to the first lower sound beam. A first notch is provided on the side where the large transverse sound beam is connected to the panel and the side panel, and a first crescent hole is formed between the first notch and the inner wall of the panel and the side panel in the assembled state. A second notch is provided on the side where the large transverse sound beam is connected to the middle panel and the side panel, and a second crescent hole is formed between the second notch and the inner wall of the middle panel and the side panel in the assembled state.

[0026] 8. In the above scheme, a third notch is provided on the side where the small transverse tone beam is connected to the middle plate and the side plate, and a third crescent hole is formed between the third notch and the inner wall of the middle plate and the side plate in the assembled state. A fourth notch is provided on the side where the small transverse tone beam is connected to the front bottom plate and the side plate, and a fourth crescent hole is formed between the fourth notch and the inner wall of the front bottom plate and the side plate in the assembled state.

[0027] 9. In the above scheme, it is best if the first groove, the second groove, the fifth groove, the sixth groove, the seventh groove, the eighth groove, the third groove, the fourth groove, the ninth groove and the tenth groove are all arc-shaped grooves.

[0028] The design principle and concept of the present invention are: for a ten-stringed harp, 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 resonance box of the existing ten-stringed harp cannot take into account the high, middle and low frequency ranges while having good resonance timbre and penetration, the present invention is mainly improved 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 first upper sound beams are fixed and arranged in parallel on the inner wall of the panel of the first resonance chamber; second, two second upper sound beams are fixed and arranged in parallel on the lower side wall of the middle plate of the second resonance chamber; third, transverse and longitudinal grooves (i.e., the first groove and the second groove) are opened on the inner wall of the panel of the first resonance chamber to form an upper transverse sound tunnel and an upper longitudinal sound tunnel; fourth, transverse and longitudinal grooves (i.e., the third groove and the fourth groove) are opened on the lower side wall of the middle plate of the second resonance chamber to form an upper transverse sound tunnel and an upper longitudinal sound tunnel. The present invention aims at the problem that the high pitch of the existing ten-string harp is not bright, the bass is not thick and round enough, and the sound penetration is not strong. The resonance box of the ten-string harp, especially the resonance box structure and the sound generation mechanism, is deeply discussed and studied, and it is found that the main reason for the poor timbre and volume of the high and low pitch of the existing ten-string harp and the lack of penetration is due to the unreasonable design of the resonance box, especially the resonance cavity, which causes the sound waves to fail to resonate and vibrate well in the resonance cavity during performance. Based on this, the inventor broke the constraints of the traditional resonance box design of the ten-string harp in the past, and boldly proposed the improved design scheme of the present invention, which solved the problem that the high pitch of the ten-string harp is not bright, the bass is not thick and round enough, and the sound penetration is not strong from the perspective of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantial characteristics and significant technical progress, and has achieved obvious technical effects.

[0029] 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):

[0030] 1. The present invention is provided with a double sound beam structure on the panel, the middle panel and the bottom panel (that is, two first upper sound beams are arranged in parallel on the inner wall of the panel, two first lower sound beams are arranged in parallel on the upper side wall of the middle panel, two second lower sound beams are arranged in parallel on the inner wall of the rear bottom panel, two second upper sound beams are arranged in parallel on the lower side wall of the middle panel, and two third lower sound beams are arranged in parallel on the inner wall of the front bottom panel). 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 panel, the middle panel and the bottom panel, 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 panel, the middle panel and the bottom panel is strengthened, and the thickness difference between the central area and the surrounding edge areas of the resonance box is relatively changed, which also has a good effect on improving the timbre and penetration of the treble area.

[0031] 2. The present invention provides transverse and longitudinal grooves (i.e., the first groove to the tenth groove) on the inner walls of the front panel, the middle panel, and the bottom panel, respectively, for the first resonance chamber and the second resonance chamber. These grooves form sound tunnels (i.e., sound tunnels) on their respective panel 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 peripheral 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 periphery of the resonance chamber through the upper and lower 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.

[0032] 3. 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 cavity.

[0033] 4. The present invention adopts a combination design of transverse sound beams, longitudinal sound beams and grooves on the inner walls of the panel, the middle panel and the bottom panel, and divides the space below the panel corresponding to the first resonance cavity into four resonance areas in the front half and four resonance areas in the back half in a top view; at the same time, the space above the middle panel corresponding to the first resonance cavity is divided into four resonance areas, the space above the back bottom panel corresponding to the first resonance cavity is divided into four resonance areas, the space below the middle panel corresponding to the second resonance cavity is divided into four resonance areas, and the space above the front panel corresponding to the second resonance cavity is divided into four resonance areas, totaling 24 resonance areas. When the ten-string zither 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. The improvement of the ten-string zither can only generate eight sound wave quantities when playing, namely, two resonance areas in the upper half of the first resonance cavity, two resonance areas in the lower half, one resonance area in the half of the second resonance cavity, and one resonance area in the lower half, totaling six resonance areas. Each resonance area produces one sound wave amount, plus one string wave amount, plus one percussion wave amount, for a total of eight sound waves. The improved ten-stringed harp of the present invention can produce twenty-six sound waves when played, wherein twenty-four resonance areas produce twenty-four sound waves, plus one string wave amount, plus one percussion wave amount, for a total of twenty-six sound waves. The sound wave amount, i.e., the number of sound waves, for a plucked instrument in a specific resonance box, in addition to one string wave amount and one percussion wave amount, mainly depends on the number of resonance areas in the resonance box. Normally, each resonance area of ​​the instrument produces one sound wave amount when playing, and the number of sound waves produced is the same as 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.

[0034] 5. The crescent holes between the transverse beam and the top plate, the middle plate and the bottom plate of the present invention are channels between various resonance areas in the resonance cavity. This channel design is conducive to the mutual transmission of sound waves, resonance and vibration.

[0035] 6. The present invention has a reinforcing plate (i.e., a first upper reinforcing plate, a first lower reinforcing plate, and a second lower reinforcing plate) fixedly mounted between two adjacent sound beams. The functions of the reinforcing plate are, first, to increase the strength of the middle area of ​​the top plate, the middle plate, and the bottom plate, especially between the sound beams; second, to 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 cavity is strengthened, and relatively speaking, the strength gap with the peripheral areas of the resonance cavity is widened, which is also conducive to improving the timbre and penetration of the treble area.

[0036] 7. The first to tenth grooves of the present invention are all arc-shaped grooves, which can minimize the thickness changes of the panel, middle plate and bottom plate, thereby affecting the resonance and vibration of the resonance box.

[0037] The above advantages and effects are all explained in the best way. However, it should be emphasized that for the present invention, the measures of setting a double beam structure and opening a groove on the inner wall of the first resonance chamber panel and the lower side wall of the second resonance chamber middle plate are more important than adopting equivalent measures on the upper side wall of the first resonance chamber middle plate and the inner wall of the second resonance chamber bottom plate, and the effect and result are relatively better. The reason is that the panel is provided with strings, while the bottom plate is not directly connected to the strings. Therefore, setting a double beam structure and opening a groove on the inner wall of the panel are the key to solving the technical problem of the present invention, and setting a double beam structure and opening a groove on the inner wall of the bottom plate 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

[0038] Attached Figure 1 This is a schematic diagram of the main structure of a ten-stringed harp resonance box according to an embodiment of the present invention;

[0039] Attached Figure 2 for Figure 1 AA cross-sectional view in;

[0040] Attached Figure 3 for Figure 2 A cross-sectional view of the resonance box in FIG.

[0041] Attached Figure 4 It is a front view of the inner wall of the panel of the ten-stringed harp resonance box according to an embodiment of the present invention;

[0042] Attached Figure 5 It is a front view of the inner wall of the bottom plate of the ten-stringed harp resonance box according to an embodiment of the present invention;

[0043] Attached Figure 6 A top view of the middle plate of the ten-string harp resonance box according to an embodiment of the present invention;

[0044] Attached Figure 7 It is a front view of a first upper sound beam of a ten-stringed harp according to an embodiment of the present invention;

[0045] Attached Figure 8 It is a left side view of the first upper sound beam of the ten-string harp according to an embodiment of the present invention;

[0046] Attached Fig. 9 It is a front view of the first lower sound beam of the ten-stringed harp according to an embodiment of the present invention;

[0047] Attached Fig.10 It is a left side view of the first lower sound beam of the ten-stringed harp according to an embodiment of the present invention;

[0048] Attached Fig.11It is a front view of the second lower sound beam of the ten-stringed harp according to an embodiment of the present invention;

[0049] Attached Fig.12 It is a left side view of the second lower sound beam of the ten-string harp according to an embodiment of the present invention;

[0050] Attached Fig.13 It is a front view of the second upper sound beam of the ten-string guitar according to an embodiment of the present invention;

[0051] Attached Fig.14 It is a left side view of the second upper sound beam of the ten-string harp according to an embodiment of the present invention;

[0052] Attached Fig.15 It is a front view of the third lower sound beam of the ten-string harp according to an embodiment of the present invention;

[0053] Attached Fig.16 It is a left side view of the third lower sound beam of the ten-string harp according to an embodiment of the present invention;

[0054] Attached Fig.17 It is a front view of the large horizontal sound beam of the ten-stringed harp according to an embodiment of the present invention;

[0055] Attached Fig.18 It is a left side view of the large horizontal sound beam of the ten-stringed harp according to an embodiment of the present invention;

[0056] Attached Fig.19 It is a front view of a small horizontal sound beam of a ten-stringed guitar according to an embodiment of the present invention;

[0057] Attached Fig. 20 It is a left side view of a small horizontal sound beam of a ten-string guitar according to an embodiment of the present invention.

[0058] In the above figures: 1. panel; 2. bottom plate; 201. front bottom plate; 202. rear bottom plate; 3. side plate; 4. middle plate; 5. first resonance chamber; 6. second resonance chamber; 7. first sound hole; 8. first groove; 9. second groove; 10. fifth groove; 11. sixth groove; 12. seventh groove; 13. eighth groove; 14. third groove; 15. fourth groove; 16. ninth groove; 17. tenth groove; 18. first upper sound beam; 19. second upper sound beam; 20. first lower sound beam; 21. second lower sound beam; 22. third lower sound beam; 23. second sound hole; 24. third sound hole; 25. large horizontal sound beam; 26. small horizontal sound beam; 27. first upper reinforcement plate; 28. first lower reinforcement plate; 29. ​​second lower reinforcement plate; 30. first upper bridge hole; 31. 3. The second upper bridge hole; 32. The first lower bridge hole; 33. The second lower bridge hole; 34. The third lower bridge hole; 35. The first gap; 36. The second gap; 37. The first escape; 38. The second escape; 39. The pillar; 40. The third gap; 41. The fourth gap; 42. The first crescent hole; 43. The second crescent hole; 44. The third crescent hole; 45. The fourth crescent hole. DETAILED DESCRIPTION

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0060] Embodiment: A double-beam ten-string harp

[0061] 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 resonance box of the ten-stringed harp, while other structures can be considered to be implemented using existing technologies and will not be described in detail in this embodiment.

[0062] The structure and construction of the ten-stringed harp resonance box of this embodiment are as follows: Figure 1-20 As shown, the body of the resonance box is composed of a panel 1, a bottom panel 2, and a side panel 3 (see Figure 1 ), the bottom plate 2 is formed by the front bottom plate 201 and the rear bottom plate 202 being staggered and connected in the height direction of the box body (see Figure 1 ), wherein the front bottom plate 201 is lower than the rear bottom plate 202 in the height direction of the box. An intermediate plate 4 is provided in the box (see Figure 1 and Figure 3 ), the middle plate 4 is located at the position corresponding to the front bottom plate 201 in the front and rear directions of the box body (see Figure 1 ), the internal space of the box between the front bottom plate 201 and the panel 1 is divided into a first resonance chamber 5 located at the top and a second resonance chamber 6 located at the bottom (see Figure 1 and Figure 3 ), wherein the first resonance chamber 5 is composed of the space between the middle plate 4 and the panel 1 and the space between the rear bottom plate 202 and the panel 1 (see Figure 1 ), the second resonance chamber 6 is formed by the space between the middle plate 4 and the front bottom plate 201 (see Figure 1 The middle plate 4 is provided with a first sound hole 7 (see Figure 6 ), the first resonance chamber 5 is connected to the second resonance chamber 6 through the first sound hole 7.

[0063] Two first upper sound beams 18 are arranged in the first resonance cavity 5 (see Figure 1 ), the first upper sound beam 18 is a long sound beam component (see Figure 7 and Figure 8 ), one side of the two first upper sound beams 18 is closely fixed to the inner wall of the panel 1, and the other side of the two first upper sound beams 18 is suspended in the first resonance cavity 5 (see Figure 2 ), the length direction of the two first upper sound beams 18 is consistent with the length direction of the resonance box (see Figure 4 ), two first upper sound beams 18 are arranged parallel to each other and spaced apart in the width direction of the resonance box. The first upper sound beam 18 is provided with a first upper bridge hole 30 (see Figure 7), the first upper bridge hole 30 is a hole on one side of the first upper sound beam 18, so that the first upper sound beam 18 forms an upper bridge type sound beam structure, and the first upper bridge hole 30 is mounted on the first groove 8.

[0064] Two first grooves 8 are provided on the inner wall of the panel 1 corresponding to the first resonance cavity 5 (see Figure 4 ), the two first grooves 8 are both opened along the width direction of the resonance box, and the two first grooves 8 are arranged at intervals in the length direction of the resonance box. A second groove 9 is provided on the inner wall of the panel 1 corresponding to the first resonance cavity 5 (see Figure 4 ), the second groove 9 is opened along the length direction of the resonance box, and the second groove 9 is located at the center in the width direction of the resonance box. The two first grooves 8 and the second groove 9 are arranged crosswise on the inner wall of the panel 1 and penetrate each other, wherein the second groove 9 is located between the two first upper sound beams 18 (see Figure 4 ), the length direction of the second groove 9 is consistent with the length direction of the first upper sound beam 18. The two first grooves 8 span the two first upper sound beams 18 in the width direction of the resonance box and form two upper transverse sound tunnels on the inner wall of the panel 1, and the second grooves 9 form an upper longitudinal sound tunnel on the inner wall of the panel 1 (see Figure 4 ).

[0065] The length of the first groove 8 is less than the length of the panel 1 at the position corresponding to the first groove 8 in the first resonance cavity 5 (see Figure 4 ), smooth transition surfaces are provided between the two ends of the first groove 8 and the inner wall of the panel 1. The length of the second groove 9 is less than the length of the panel 1 at the corresponding position of the second groove 9 in the first resonance cavity 5 (see Figure 4 ), smooth transition surfaces are provided between the two ends of the second groove 9 and the inner wall of the panel 1.

[0066] Two second upper sound beams 19 are arranged in the second resonance cavity 6 (see Figure 5 ), the second upper sound beam 19 is a long sound beam component (see Fig.13 and Fig.14 ), one side of the two second upper sound beams 19 is closely fixed on the lower wall of the middle plate 4, and the other side of the two second upper sound beams 19 is suspended in the second resonance cavity 6 (see Figure 2 ), the length direction of the two second upper sound beams 19 is consistent with the length direction of the resonance box, and the two second upper sound beams 19 are parallel and spaced apart in the width direction of the resonance box (see Figure 5 The second upper sound beam 19 is provided with a second upper bridge hole 31 (see Fig.13 ), the second upper bridge hole 31 is a hole on one side of the second upper sound beam 19 so that the second upper sound beam 19 forms an upper bridge type sound beam structure, and the second upper bridge hole 31 is mounted on the third groove 14.

[0067] A third groove 14 and a fourth groove 15 are provided on the lower side wall surface of the intermediate plate 4 corresponding to the second resonance cavity 6 (see Figure 5 ), wherein the third groove 14 is opened along the width direction of the resonance box, and the fourth groove 15 is opened along the length direction of the resonance box. The third groove 14 and the fourth groove 15 are cross-arranged on the lower side wall of the middle plate 4 and are mutually connected, wherein the fourth groove 15 is located between the two second upper sound beams 19 (see Figure 5 ), the length direction of the fourth groove 15 is consistent with the length direction of the second upper sound beam 19, the third groove 14 spans the two second upper sound beams 19 in the width direction of the resonance box, and forms an upper transverse sound tunnel on the lower side wall of the middle plate 4, and the fourth groove 15 forms an upper longitudinal sound tunnel on the lower side wall of the middle plate 4 (see Figure 5 ).

[0068] The length of the third groove 14 is less than the length of the middle plate 4 in the second resonance chamber 6 at the position corresponding to the third groove 14 (see Figure 5 ), smooth transition surfaces are provided between the two ends of the third groove 14 and the lower side wall of the middle plate 4. The length of the fourth groove 15 is less than the length of the middle plate 4 at the corresponding position of the fourth groove 15 in the second resonance cavity 6 (see Figure 5 ), smooth transition surfaces are provided between both ends of the fourth groove 15 and the lower side wall surface of the middle plate 4.

[0069] Two first lower sound beams 20 are arranged in the first resonance cavity 5 (see Figure 2 and Figure 6 ), the first lower sound beam 20 is a long strip sound beam component (see Fig. 9 and Fig.10 ), one side of the two first lower sound beams 20 is closely fixed on the upper wall of the middle plate 4, and the other side of the two first lower sound beams 20 is suspended in the first resonance cavity 5 relative to the panel 1 (see Figure 2 ), the length direction of the two first lower sound beams 20 is consistent with the length direction of the resonance box, and the two first lower sound beams 20 are parallel and spaced apart in the width direction of the resonance box (see Figure 6 The first lower sound beam 20 is provided with a first lower bridge hole 32 (see Fig. 9 ), the first lower bridge hole 32 is a hole on one side of the first lower sound beam 20 so that the first lower sound beam 20 forms a lower bridge type sound beam structure, and the first lower bridge hole 32 is mounted on the fifth groove 10.

[0070] A fifth groove 10 and a sixth groove 11 are provided on the upper side wall surface of the intermediate plate 4 corresponding to the first resonance cavity 5 (see Figure 6), wherein the fifth groove 10 is opened along the width direction of the resonance box, the sixth groove 11 is opened along the length direction of the resonance box, and the fifth groove 10 and the sixth groove 11 are arranged crosswise on the upper side wall surface of the middle plate 4 and penetrate each other (see Figure 3 ), wherein the sixth groove 11 is located between the two first lower sound beams 20 (see Figure 6 ), the length direction of the sixth groove 11 is consistent with the length direction of the first lower sound beam 20, the fifth groove 10 spans the two first lower sound beams 20 in the width direction of the resonance box, and forms a lower transverse sound tunnel on the upper side wall of the middle plate 4, and the sixth groove 11 forms a lower longitudinal sound tunnel on the upper side wall of the middle plate 4 (see Figure 6 ).

[0071] The length of the fifth groove 10 is less than the length of the middle plate 4 in the first resonance chamber 5 at the position corresponding to the fifth groove 10 (see Figure 6 ), smooth transition surfaces are provided between the two ends of the fifth groove 10 and the upper side wall of the middle plate 4. The length of the sixth groove 11 is less than the length of the middle plate 4 at the corresponding position of the sixth groove 11 in the first resonance cavity 5, and smooth transition surfaces are provided between the two ends of the sixth groove 11 and the upper side wall of the middle plate 4 (see Figure 6 ).

[0072] Two second lower sound beams 21 are arranged in the first resonance cavity 5 (see Figure 5 ), the second lower sound beam 21 is a long sound beam component (see Fig.11 and Fig.12 ), one side of the two second lower sound beams 21 is closely fixed to the inner wall of the rear bottom plate 202, and the other side of the two second lower sound beams 21 is suspended in the first resonance cavity 5 relative to the panel 1 (see Figure 1 ), the length direction of the two second lower sound beams 21 is consistent with the length direction of the resonance box, and the two second lower sound beams 21 are parallel and spaced apart in the width direction of the resonance box (see Figure 5 The second lower sound beam 21 is provided with a second lower bridge hole 33 (see Fig.11 ), the second lower bridge hole 33 is a hole on one side of the second lower sound beam 21, so that the second lower sound beam 21 forms a lower bridge type sound beam structure, and the second lower bridge hole 33 is mounted on the seventh groove 12.

[0073] A seventh groove 12 and an eighth groove 13 are provided on the inner wall of the rear bottom plate 202 corresponding to the first resonance cavity 5 (see Figure 5 ), wherein the seventh groove 12 is opened along the width direction of the resonance box, and the eighth groove 13 is opened along the length direction of the resonance box. The seventh groove 12 and the eighth groove 13 are cross-arranged on the inner wall of the rear bottom plate 202 and are interconnected. The eighth groove 13 is located between the two second lower sound beams 21 (see Figure 5), the length direction of the eighth groove 13 is consistent with the length direction of the second lower sound beam 21, the seventh groove 12 spans the two second lower sound beams 21 in the width direction of the resonance box, and forms a lower transverse sound tunnel on the inner wall of the rear bottom plate 202, and the eighth groove 13 forms a lower longitudinal sound tunnel on the inner wall of the rear bottom plate 202 (see Figure 5 ).

[0074] The length of the seventh groove 12 is less than the length of the rear bottom plate 202 in the first resonance chamber 5 at the corresponding position of the seventh groove 12 (see Figure 5 ), smooth transition surfaces are provided between the two ends of the seventh groove 12 and the inner wall of the rear bottom plate 202. The length of the eighth groove 13 is less than the length of the rear bottom plate 202 at the corresponding position of the eighth groove 13 in the first resonance cavity 5 (see Figure 5 ), smooth transition surfaces are provided between both ends of the eighth groove 13 and the inner wall of the rear bottom plate 202.

[0075] Two third lower sound beams 22 are arranged in the second resonance cavity 6 (see Figure 5 ), the third lower sound beam 22 is a long sound beam component (see Fig.15 and Fig.16 ), one side of the two third lower sound beams 22 is closely fixed to the inner wall of the front bottom plate 201, and the other side of the two third lower sound beams 22 is suspended in the second resonance cavity 6 (see Figure 2 ), the length direction of the two third lower sound beams 22 is consistent with the length direction of the resonance box, and the two third lower sound beams 22 are parallel and spaced apart in the width direction of the resonance box (see Figure 5 The third lower sound beam 22 is provided with a third lower bridge hole 34 (see Fig.15 ), the third lower bridge hole 34 is a hole at one side of the third lower sound beam 22 and makes the third lower sound beam 22 form a lower bridge type sound beam structure, and the third lower bridge hole 34 is mounted on the ninth groove 16.

[0076] A ninth groove 16 and a tenth groove 17 are provided on the inner wall of the front bottom plate 201 corresponding to the second resonance cavity 6 (see Figure 5 ), wherein the ninth groove 16 is opened along the width direction of the resonance box, and the tenth groove 17 is opened along the length direction of the resonance box. The ninth groove 16 and the tenth groove 17 are cross-arranged on the inner wall of the front bottom plate 201 and are interconnected. The tenth groove 17 is located between the two third lower sound beams 22 (see Figure 5 ), the length direction of the tenth groove 17 is consistent with the length direction of the third lower sound beam 22, the ninth groove 16 spans two third lower sound beams 22 in the width direction of the resonance box, and forms a lower transverse sound tunnel on the inner wall of the front bottom plate 201, and the tenth groove 17 forms a lower longitudinal sound tunnel on the inner wall of the front bottom plate 201 (see Figure 5 ).

[0077] The length of the ninth groove 16 is less than the length of the front bottom plate 201 in the second resonance cavity 6 at the position corresponding to the ninth groove 16 (see Figure 5 ), smooth transition surfaces are provided between the two ends of the ninth groove 16 and the inner wall of the front bottom plate 201. The length of the tenth groove 17 is less than the length of the front bottom plate 201 at the corresponding position of the tenth groove 17 in the second resonance cavity 6 (see Figure 5 ), smooth transition surfaces are provided between the two ends of the tenth groove 17 and the inner wall surface of the front bottom plate 201.

[0078] A large transverse beam 25 is provided in the first resonance chamber 5 (see Figure 2 and Figure 4 ), the large transverse beam 25 is in the form of a plate (see Fig.17 and Fig.18 ), wherein the large transverse beam 25 is supported between the panel 1 and the middle panel 4 and fixed at the position of the first groove 8 (see Figure 2 The large transverse beam 25 is bilaterally symmetrical with respect to the center plane of the second groove 9, wherein the top of the large transverse beam 25 is fixedly connected to the panel 1, the bottom of the large transverse beam 25 is fixedly connected to the middle plate 4, and the side of the large transverse beam 25 is fixedly connected to the side plate 3 on the corresponding side (see Figure 2 The large transverse sound beam 25 is provided with a first avoidance opening 37 corresponding to the first upper sound beam 18 (see Fig.17 ), a support 39 is provided in the first avoidance opening 37 (see Fig.17 ), the support 39 is fixedly connected to the large horizontal sound beam 25. The large horizontal sound beam 25 is provided with a second avoidance opening 38 corresponding to the first lower sound beam 20 (see Fig.17 The side edge where the large transverse beam 25 is connected to the panel 1 and the side panel 3 is provided with a first notch 35 (see Fig.17 ), in the assembled state, the first notch 35 forms a first crescent hole 42 with the inner wall of the panel 1 and the side panel 3 (see Figure 2 A second notch 36 is provided on the side where the large transverse beam 25 is connected to the middle plate 4 and the side plate 3 (see Fig.17 ), in the assembled state, the second notch 36 forms a second crescent hole 43 between the inner wall of the middle plate 4 and the side plate 3 (see Figure 2 ).

[0079] A small transverse beam 26 is provided in the second resonance cavity 6 (see Figure 2 and Figure 5 ), the small transverse beam 26 is in the form of a plate (see Fig.19 and Fig. 20 ), wherein the small transverse beam 26 supports the space between the middle plate 4 and the front bottom plate 201 (see Figure 2 ), and fixed in the third groove 14 position (see Figure 5The small transverse beam 26 is bilaterally symmetrical with respect to the center plane of the fourth groove 15, wherein the top of the small transverse beam 26 is fixedly connected to the middle plate 4, the bottom of the small transverse beam 26 is fixedly connected to the front bottom plate 201, and the side of the small transverse beam 26 is fixedly connected to the side plate 3 on the corresponding side (see Figure 2 A third notch 40 is provided on the side where the small transverse beam 26 is connected to the middle plate 4 and the side plate 3 (see Fig.19 ), in the assembled state, the third notch 40 forms a third crescent hole 44 between the inner wall of the middle plate 4 and the side plate 3 (see Figure 2 A fourth notch 41 is provided on the side where the small transverse beam 26 is connected to the front bottom plate 201 and the side plate 3 (see Fig.19 ), in the assembled state, the fourth notch 41 forms a fourth crescent hole 45 between the front bottom plate 201 and the inner wall of the side plate 3 (see Figure 2 ).

[0080] A first upper reinforcement plate 27 (see Figure 2 A first lower reinforcement plate 28 is fixedly mounted between the two first lower sound beams 20 (see Figure 2 A second lower reinforcement plate 29 is fixedly mounted between the two second lower sound beams 21 (see Figure 5 The first groove 8 and the second groove 9 (see Figure 3 )、the fifth groove 10, the sixth groove 11 (see Figure 3 ), the seventh groove 12, the eighth groove 13, the third groove 14, the fourth groove 15, the ninth groove 16 and the tenth groove 17 (see Figure 3 ) are all arc grooves.

[0081] The following is an explanation of other implementations and structural changes of the present invention:

[0082] 1. In the above embodiment, the two first upper sound beams 18 are arranged parallel to each other in the width direction of the resonance box (see Figure 2 ). The two first lower sound beams 20 are arranged in parallel (see Figure 2 ). The two second lower sound beams 21 are arranged in parallel (see Figure 5 ). The two second upper beams 19 are arranged in parallel (see Figure 2 ). The two third lower sound beams 22 are arranged in parallel (see Figure 2 ). However, the present invention is not limited thereto, and the two first upper sound beams 18 do not necessarily have to be parallel, and the two first lower sound beams 20, the two second lower sound beams 21, the two second upper sound beams 19, and the two third lower sound beams 22 do not necessarily have to be parallel, but parallel arrangement is optimal, which is easily understood and accepted by those skilled in the art.

[0083] 2. In the above embodiments, double-tone beam structures and grooves are provided on the inner walls of the panel 1 and the bottom plate 2 and the upper and lower side walls of the middle plate 4. However, the present invention is not limited to this. The double-tone beams and grooves on the inner wall of the bottom plate 2 and the upper side wall of the middle plate 4 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 panel 1 and the lower side wall of the middle plate 4, but the effect is slightly worse. For the resonance box of the ten-string guitar, the panel 1 is more important than the bottom plate 2. The reason is that the strings are provided on the panel 1, while the bottom plate 2 is not directly related to the strings, which is easy to understand for those skilled in the art.

[0084] 3. In the above embodiments, a double sound beam structure is provided on the inner walls of the panel 1 and the bottom plate 2 and on the upper and lower side walls of the middle plate 4, that is, a structure in which two sound beams are arranged in parallel. However, the present invention is not limited to this, and the two sound beams can be changed in form to four sound beams used in parallel. For the present invention, although the four sound beams and the two sound beams are different in number and form, their essence is the same. Assuming that the two outer sound beams of the four sound beams 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. In the present invention, the double sound beam includes the meaning of symmetrical arrangement of an even number of sound beams, so the symmetrical arrangement of six sound beams is also an equivalent variation of the present invention. This is easy to understand for those skilled in the art.

[0085] 4. In the above embodiment, the number of the first grooves 8 is two (see Figure 4 ), the number of the second groove 9 to the tenth groove 17 is one (see Figure 5 and Figure 6 ). However, the present invention is not limited thereto, and the number of the first groove 8 to the tenth groove 17 can be one or more. Such changes can be determined according to actual conditions. In essence, the number of the first groove 8 to the tenth groove 17 is at least one. This is easily understood by those skilled in the art.

[0086] 5. In the above embodiment, the large transverse beam 25 provided in the resonance box is bilaterally symmetrical with respect to the center plane of the second groove 9 (see Figure 2 ). However, the present invention is not limited thereto, and each large transverse beam 25 can be decomposed into two left and right beams, and the two beams can be arranged symmetrically with respect to the center plane of the second groove 9. Similarly, the small transverse beam 26 arranged in the resonance box is symmetrical with respect to the center plane of the fourth groove 15 (see Figure 2 ). However, the present invention is not limited thereto, and the two small transverse beams 26 can be combined into one, and arranged in a bilaterally symmetrical manner with the center plane of the fourth groove 15 as a reference. This is easily understood and accepted by those skilled in the art.

[0087] 6. In the above embodiment, a first upper bridge hole 30 is provided on the first upper sound beam 18, a second upper bridge hole 31 is provided on the second upper sound beam 19, a first lower bridge hole 32 is provided on the first lower sound beam 20, a second lower bridge hole 33 is provided on the second lower sound beam 21, and a third lower bridge hole 34 is provided on the third lower sound beam 22. However, the present invention is not limited thereto, and the first upper bridge hole 30 may not be provided, and the second upper bridge hole 31, the first lower bridge hole 32, the second lower bridge hole 33 and the third lower bridge hole 34 may not be provided, or even only one or two of the first upper sound beam 18, the second upper sound beam 19, the first lower sound beam 20, the second lower sound beam 21 and the third lower sound beam 22 may be provided with bridge holes. This is a change that is easily understood and accepted by those skilled in the art.

[0088] 7. In the above embodiment, a first upper reinforcing plate 27 (see Figure 2 ), a first lower reinforcing plate 28 is fixedly mounted between the two first lower sound beams 20 (see Figure 2 ), a second lower reinforcement plate 29 is fixedly mounted between the two second lower sound beams 21 (see Figure 5 ). However, the present invention is not limited thereto, and the first upper reinforcing plate 27 may not be provided, and the two first upper sound beams 18 may be suspended in the resonance box. Similarly, the first lower reinforcing plate 28 may not be provided, and the two first lower sound beams 20 may be suspended in the resonance box, and the second lower reinforcing plate 29 may not be provided.

[0089] 8. In the above embodiments, the first groove 8 to the tenth groove 17 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.

[0090] 9. In the above embodiment, when observing from the cross section of the first resonance chamber 5 (see Figure 2 ), the two first lower sound beams 20 and the two first upper sound beams 18 are aligned in the vertical direction (see Figure 2 ). However, the present invention is not limited thereto, and the arrangement may not be aligned, but the alignment arrangement has the best effect. This is easily understood and accepted by those skilled in the art.

[0091] 10. In the above embodiment, the two first upper sound beams 18 have the same shape and size (see Figure 7 ), the two first lower sound beams 20 have the same shape and size (see Fig. 9 ), the two second lower sound beams 21 have the same shape and size (see Fig.11 ), the two second upper beams 19 have the same shape and size (see Fig.13 ), the two third lower sound beams 22 have the same shape and size (see Fig.15). However, the present invention is not limited thereto. The shapes and sizes of the two first upper sound beams 18 may be different, the shapes and sizes of the two first lower sound beams 20 may be different, the shapes and sizes of the two second lower sound beams 21 may be different, the shapes and sizes of the two second upper sound beams 19 may be different, and the shapes and sizes of the two third lower sound beams 22 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.

[0092] 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 ten-stringed harp, comprising a resonance box, wherein the resonance box is composed of a panel (1), a bottom plate (2), and side plates (3), wherein the bottom plate (2) is formed by a front bottom plate (201) and a rear bottom plate (202) connected in a staggered manner in the height direction of the box, wherein: The front bottom plate (201) is lower than the rear bottom plate (202) in the height direction of the box; an intermediate plate (4) is provided in the box, and the intermediate plate (4) is located at a position corresponding to the front bottom plate (201) in the front-back direction of the box, and divides the internal space of the box between the front bottom plate (201) and the panel (1) into a first resonance chamber (5) located at the top and a second resonance chamber (6) located at the bottom, wherein the first resonance chamber (5) is composed of the space between the intermediate plate (4) and the panel (1) and the space between the rear bottom plate (202) and the panel (1), and the second resonance chamber (6) is composed of the space between the intermediate plate (4) and the front bottom plate (201); a first sound hole (7) is provided on the intermediate plate (4), and the first resonance chamber (5) and the second resonance chamber (6) are connected through the first sound hole (7), characterized in that: Two first upper sound beams (18) are arranged in the first resonance chamber (5), the first upper sound beams (18) being long strip-shaped sound beam components, one side of the two first upper sound beams (18) being closely fixed to the inner wall of the panel (1), and the other side of the two first upper sound beams (18) being suspended in the first resonance chamber (5), the length direction of the two first upper sound beams (18) being consistent with the length direction of the resonance box, and the two first upper sound beams (18) being arranged side by side and spaced a distance apart in the width direction of the resonance box; A first groove (8) is provided on the inner wall of the panel (1) corresponding to the first resonance cavity (5), and the first groove (8) is opened along the width direction of the resonance box; a second groove (9) is provided on the inner wall of the panel (1) corresponding to the first resonance cavity (5), and the second groove (9) is opened along the length direction of the resonance box; the first groove (8) and the second groove (9) are cross-arranged on the inner wall of the panel (1) and are interconnected, wherein the second groove (9) is located between the two first upper sound beams (18), and the length direction of the second groove (9) is consistent with the length direction of the first upper sound beam (18); the first groove (8) spans the two first upper sound beams (18) in the width direction of the resonance box and forms an upper transverse sound tunnel on the inner wall of the panel (1), and the second groove (9) forms an upper longitudinal sound tunnel on the inner wall of the panel (1); Two second upper sound beams (19) are arranged in the second resonance chamber (6), the second upper sound beams (19) being long strip-shaped sound beam components, one side of the two second upper sound beams (19) being closely fixed to the lower wall surface of the middle plate (4), the other side of the two second upper sound beams (19) being suspended in the second resonance chamber (6), the length direction of the two second upper sound beams (19) being consistent with the length direction of the resonance box, and the two second upper sound beams (19) being arranged side by side and spaced a certain distance apart in the width direction of the resonance box; A third groove (14) and a fourth groove (15) are provided on the lower side wall surface of the middle plate (4) corresponding to the second resonance chamber (6), wherein the third groove (14) is opened along the width direction of the resonance box, and the fourth groove (15) is opened along the length direction of the resonance box, and the third groove (14) and the fourth groove (15) are cross-arranged and mutually interpenetrating on the lower side wall surface of the middle plate (4), wherein the fourth groove (15) is located between the two second upper sound beams (19), and the length direction of the fourth groove (15) is consistent with the length direction of the second upper sound beam (19), and the third groove (14) crosses the two second upper sound beams (19) in the width direction of the resonance box and forms an upper transverse sound tunnel on the lower side wall surface of the middle plate (4), and the fourth groove (15) forms an upper longitudinal sound tunnel on the lower side wall surface of the middle plate (4); A large transverse sound beam (25) is provided in the first resonance chamber (5), and the large transverse sound beam (25) is in the shape of a plate, wherein the large transverse sound beam (25) is supported between the panel (1) and the middle panel (4), and is fixed at the position of the first groove (8); the large transverse sound beam (25) is bilaterally symmetrical with respect to the central plane of the second groove (9), wherein the top of the large transverse sound beam (25) is fixedly connected to the panel (1), the bottom of the large transverse sound beam (25) is fixedly connected to the middle panel (4), and the side of the large transverse sound beam (25) is fixedly connected to the side panel (3) on the corresponding side; A small transverse tone beam (26) is provided in the second resonance chamber (6), and the small transverse tone beam (26) is in the shape of a plate, wherein the small transverse tone beam (26) supports between the middle plate (4) and the front bottom plate (201), and is fixed at the position of the third groove (14); the small transverse tone beam (26) is bilaterally symmetrical with respect to the center plane of the fourth groove (15), wherein the top of the small transverse tone beam (26) is fixedly connected to the middle plate (4), the bottom of the small transverse tone beam (26) is fixedly connected to the front bottom plate (201), and the side of the small transverse tone beam (26) is fixedly connected to the side plate (3) on the corresponding side.

2. The ten-stringed instrument according to claim 1, characterized in that: Two first lower sound beams (20) are arranged in the first resonance cavity (5), the first lower sound beams (20) being long strip-shaped sound beam components, one side of the two first lower sound beams (20) being closely fixed to the upper wall surface of the middle plate (4), the other side of the two first lower sound beams (20) being suspended in the first resonance cavity (5) relative to the panel (1), the length direction of the two first lower sound beams (20) being consistent with the length direction of the resonance box, and the two first lower sound beams (20) being arranged side by side and spaced a certain distance apart in the width direction of the resonance box; A fifth groove (10) and a sixth groove (11) are provided on the upper side wall surface of the middle plate (4) corresponding to the first resonance chamber (5), wherein the fifth groove (10) is opened along the width direction of the resonance box, and the sixth groove (11) is opened along the length direction of the resonance box, and the fifth groove (10) and the sixth groove (11) are cross-arranged on the upper side wall surface of the middle plate (4) and are mutually connected, wherein the sixth groove (11) is located between the two first lower sound beams (20), and the length direction of the sixth groove (11) is consistent with the length direction of the first lower sound beam (20), the fifth groove (10) crosses the two first lower sound beams (20) in the width direction of the resonance box, and forms a lower transverse sound tunnel on the upper side wall surface of the middle plate (4), and the sixth groove (11) forms a lower longitudinal sound tunnel on the upper side wall surface of the middle plate (4); Two second lower sound beams (21) are arranged in the first resonance chamber (5), the second lower sound beams (21) being long strip-shaped sound beam components, one side of the two second lower sound beams (21) being closely fixed to the inner wall of the rear bottom plate (202), the other side of the two second lower sound beams (21) being suspended in the first resonance chamber (5) relative to the panel (1), the length direction of the two second lower sound beams (21) being consistent with the length direction of the resonance box, and the two second lower sound beams (21) being arranged side by side and spaced a certain distance apart in the width direction of the resonance box; A seventh groove (12) and an eighth groove (13) are provided on the inner wall of the rear bottom plate (202) corresponding to the first resonance chamber (5), wherein the seventh groove (12) is opened along the width direction of the resonance box, and the eighth groove (13) is opened along the length direction of the resonance box, and the seventh groove (12) and the eighth groove (13) are cross-arranged on the inner wall of the rear bottom plate (202) and are interconnected, wherein the eighth groove (13) is located between the two second lower sound beams (21), and the length direction of the eighth groove (13) is consistent with the length direction of the second lower sound beam (21), the seventh groove (12) crosses the two second lower sound beams (21) in the width direction of the resonance box, and forms a lower transverse sound tunnel on the inner wall of the rear bottom plate (202), and the eighth groove (13) forms a lower longitudinal sound tunnel on the inner wall of the rear bottom plate (202); Two third lower sound beams (22) are arranged in the second resonance chamber (6), the third lower sound beams (22) being long strip-shaped sound beam components, one side of the two third lower sound beams (22) being closely fixed to the inner wall of the front bottom plate (201), the other side of the two third lower sound beams (22) being suspended in the second resonance chamber (6), the length direction of the two third lower sound beams (22) being consistent with the length direction of the resonance box, and the two third lower sound beams (22) being arranged side by side and spaced a distance apart in the width direction of the resonance box; A ninth groove (16) and a tenth groove (17) are provided on the inner wall of the front bottom plate (201) corresponding to the second resonance chamber (6), wherein the ninth groove (16) is opened along the width direction of the resonance box, and the tenth groove (17) is opened along the length direction of the resonance box, and the ninth groove (16) and the tenth groove (17) are cross-arranged on the inner wall of the front bottom plate (201) and are interconnected, wherein the tenth groove (17) is located between two third lower sound beams (22), and the length direction of the tenth groove (17) is consistent with the length direction of the third lower sound beam (22), the ninth groove (16) crosses the two third lower sound beams (22) in the width direction of the resonance box, and forms a lower transverse sound tunnel on the inner wall of the front bottom plate (201), and the tenth groove (17) forms a lower longitudinal sound tunnel on the inner wall of the front bottom plate (201).

3. The ten-stringed instrument according to claim 2, characterized in that: The first upper sound beam (18) is provided with a first upper bridge hole (30), the first upper bridge hole (30) is a hole on one side of the first upper sound beam (18) and enables the first upper sound beam (18) to form an upper bridge type sound beam structure, and the first upper bridge hole (30) is mounted on the first groove (8); The second upper sound beam (19) is provided with a second upper bridge hole (31), the second upper bridge hole (31) is a hole on one side of the second upper sound beam (19) so that the second upper sound beam (19) forms an upper bridge type sound beam structure, and the second upper bridge hole (31) is mounted on the third groove (14); The first lower sound beam (20) is provided with a first lower bridge hole (32), the first lower bridge hole (32) is a hole on one side of the first lower sound beam (20) and enables the first lower sound beam (20) to form a lower bridge type sound beam structure, and the first lower bridge hole (32) is mounted on the fifth groove (10); The second lower sound beam (21) is provided with a second lower bridge hole (33), the second lower bridge hole (33) is a hole on one side of the second lower sound beam (21) so that the second lower sound beam (21) forms a lower bridge type sound beam structure, and the second lower bridge hole (33) is mounted on the seventh groove (12); The third lower sound beam (22) is provided with a third lower bridge hole (34), the third lower bridge hole (34) is a hole on one side of the third lower sound beam (22) so that the third lower sound beam (22) forms a lower bridge type sound beam structure, and the third lower bridge hole (34) is mounted on the ninth groove (16).

4. The ten-stringed instrument according to claim 2, characterized in that: A first upper reinforcing plate (27) is fixedly mounted between the two first upper sound beams (18); a first lower reinforcing plate (28) is fixedly mounted between the two first lower sound beams (20); and a second lower reinforcing plate (29) is fixedly mounted between the two second lower sound beams (21).

5. The ten-stringed instrument according to claim 1, characterized in that: The length of the first groove (8) is smaller than the length of the panel (1) in the first resonance cavity (5) at a position corresponding to the first groove (8), and smooth transition surfaces are provided between the two ends of the first groove (8) and the inner wall of the panel (1); the length of the second groove (9) is smaller than the length of the panel (1) in the first resonance cavity (5) at a position corresponding to the second groove (9), and smooth transition surfaces are provided between the two ends of the second groove (9) and the inner wall of the panel (1); The length of the third groove (14) is smaller than the length of the middle plate (4) in the second resonance chamber (6) at a position corresponding to the third groove (14), and smooth transition surfaces are provided between the two ends of the third groove (14) and the lower side wall surface of the middle plate (4); the length of the fourth groove (15) is smaller than the length of the middle plate (4) in the second resonance chamber (6) at a position corresponding to the fourth groove (15), and smooth transition surfaces are provided between the two ends of the fourth groove (15) and the lower side wall surface of the middle plate (4).

6. The ten-stringed instrument according to claim 2, characterized in that: The length of the fifth groove (10) is smaller than the length of the middle plate (4) in the first resonance chamber (5) at a position corresponding to the fifth groove (10), and smooth transition surfaces are provided between the two ends of the fifth groove (10) and the upper side wall surface of the middle plate (4); the length of the sixth groove (11) is smaller than the length of the middle plate (4) in the first resonance chamber (5) at a position corresponding to the sixth groove (11), and smooth transition surfaces are provided between the two ends of the sixth groove (11) and the upper side wall surface of the middle plate (4); The length of the seventh groove (12) is smaller than the length of the rear bottom plate (202) in the first resonance chamber (5) at a position corresponding to the seventh groove (12), and smooth transition surfaces are provided between the two ends of the seventh groove (12) and the inner wall of the rear bottom plate (202); the length of the eighth groove (13) is smaller than the length of the rear bottom plate (202) in the first resonance chamber (5) at a position corresponding to the eighth groove (13), and smooth transition surfaces are provided between the two ends of the eighth groove (13) and the inner wall of the rear bottom plate (202); The length of the ninth groove (16) is smaller than the length of the front bottom plate (201) in the second resonance chamber (6) at a position corresponding to the ninth groove (16), and smooth transition surfaces are provided between both ends of the ninth groove (16) and the inner wall of the front bottom plate (201); the length of the tenth groove (17) is smaller than the length of the front bottom plate (201) in the second resonance chamber (6) at a position corresponding to the tenth groove (17), and smooth transition surfaces are provided between both ends of the tenth groove (17) and the inner wall of the front bottom plate (201).

7. The ten-stringed instrument according to claim 1, characterized in that: A first avoidance opening (37) is provided on the large transverse sound beam (25) corresponding to the first upper sound beam (18), a support (39) is provided in the first avoidance opening (37), and the support (39) is fixedly connected to the large transverse sound beam (25); a second avoidance opening (38) is provided on the large transverse sound beam (25) corresponding to the first lower sound beam (20); A first notch (35) is provided on the side where the large transverse sound beam (25) is connected to the panel (1) and the side panel (3); in the assembled state, a first crescent hole (42) is formed between the first notch (35) and the inner wall of the panel (1) and the side panel (3); a second notch (36) is provided on the side where the large transverse sound beam (25) is connected to the middle panel (4) and the side panel (3); in the assembled state, a second crescent hole (43) is formed between the second notch (36) and the inner wall of the middle panel (4) and the side panel (3).

8. The ten-stringed instrument according to claim 1, characterized in that: A third notch (40) is provided on the side where the small transverse tone beam (26) is connected to the middle plate (4) and the side plate (3); in the assembled state, a third crescent hole (44) is formed between the third notch (40) and the inner wall of the middle plate (4) and the side plate (3); a fourth notch (41) is provided on the side where the small transverse tone beam (26) is connected to the front bottom plate (201) and the side plate (3); in the assembled state, a fourth crescent hole (45) is formed between the fourth notch (41) and the inner wall of the front bottom plate (201) and the side plate (3).

9. The ten-stringed instrument according to claim 2, characterized in that: The first groove (8), the second groove (9), the fifth groove (10), the sixth groove (11), the seventh groove (12), the eighth groove (13), the third groove (14), the fourth groove (15), the ninth groove (16) and the tenth groove (17) are all arc-shaped grooves.

Images