A double-beam guqin

Abstract

A two-tone beam guqin, comprising a resonance box, which is formed by splicing a panel and a bottom board, and is characterized in that: two upper tone beams are fixedly arranged in parallel on the inner wall of the panel; two lower tone beams are fixedly arranged in parallel on the inner wall of the bottom board; an upper "丰" (Feng) character-shaped groove is opened on the inner wall of the panel to form an upper "丰" (Feng) character-shaped sound tunnel; a lower "丰" (Feng) character-shaped groove is opened on the inner wall of the bottom board to form a lower "丰" (Feng) character-shaped sound tunnel; six transverse tone beams are fixedly arranged between the panel and the bottom board, three of which are arranged at the left half groove positions of the "丰" (Feng) character-shaped groove, and three of which are arranged at the right half groove positions of the "丰" (Feng) character-shaped groove. This solution breaks the shackles of the traditional design of the internal structure of the guqin resonance box in the past, boldly proposes a new improved design solution, and solves the problems that there is only string sound but no qin sound, poor resonance effect, insufficient penetration and small volume when playing the guqin in the past.

Description

Technical Field

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

[0002] Guqin, also known as Yaoqin, Yuqin or Qixianqin, is a traditional Chinese plucked string instrument with a history of more than 3,000 years. It belongs to the silk among the eight musical instruments. Guqin has a wide range of sound, deep timbre and long lingering sound. On November 7, 2003, the UNESCO World Heritage Committee announced that the Chinese Guqin was selected as a World Cultural Heritage. In 2006, it was included in the list of China's intangible cultural heritage.

[0003] Guqin is a long and narrow wooden stringed instrument, usually composed of the top, strings, qin badges, yueshan, fly head, bottom, dragon pool, wind pond, goose foot, pegs, peg pool, peg guard, etc. The current Guqin style was basically finalized as early as the end of the Eastern Han Dynasty. Its shape is as follows: the body is usually about 120 cm long, 20 cm wide, and 6 cm thick, composed of the bottom plate and the top plate, so-called the top is paulownia and the bottom is zelkova. The top is usually planed from paulownia or fir, planed into an arc of about 60 degrees, and the inner surface is carved into a groove; then a flat piece of zelkova, Chinese toon, alder or other miscellaneous wood is used as the bottom plate, and the top and bottom plates are glued together to make the whole body a resonance box, and then various accessories are installed, polished into shape, coated with a layer of hard and heavy lacquer ash, dried and polished, and painted with a thin layer of lacquer, and it is a traditional Guqin.

[0004] The range of the guqin is four octaves and two notes. There are seven open notes, ninety-one overtones, and one hundred and forty-seven pressed notes. The sound of the guqin is very unique. Most people can feel the tranquility and remoteness of the guqin when listening to the music. The open notes, overtones, and pressed notes are all very quiet. The open notes are loose and deep, making people think of ancient times; the overtones are like the sounds of nature, giving people a sense of coolness and immortality; the pressed notes are very rich, and the lingering rhymes under the fingers are subtle and long, sometimes like human language, which can be used for dialogue, and sometimes like the emotions of people's hearts, ethereal and changeable.

[0005] The resonance box of the guqin is mainly composed of a panel 1 and a bottom plate 2 (see Figure 3 and Figure 4 ), the bottom plate 2 is usually flat, and a dragon pool 3 and a phoenix pond 4 are arranged on the bottom plate 2 (see Figure 1 and Figure 2 ), the panel 1 is arched, and the inner wall of the panel 1 is provided with sound beams 5 corresponding to the positions of the dragon pool 3 and the phoenix pond 4 (see Figure 4-Figure 6), two sound beams 5 are fixed on the inner wall of the panel 1. The biggest defects of the guqin at present are poor penetration and low volume. When playing the guqin, there is only the sound of string vibration, but almost no sound of the instrument vibration, so that in the concert hall, microphones and speakers must be used to achieve the sound effect. The main reason is that the resonance box of the guqin is not designed reasonably, which is not conducive to the good sound wave resonance and vibration from the high pitch to the low pitch. Therefore, when the guqin is played, there is only the sound of the strings but no sound of the instrument. Even if the audience sits in the first row, they cannot hear the sound of the guqin clearly.

[0006] In view of this, how to improve the existing resonance box of the guqin to improve the penetration and volume while maintaining the original timbre is the research topic of the present invention. Summary of the invention

[0007] The invention provides a double-sound-beam guqin, and aims to solve the problems of poor resonance effect, poor penetration and too small sound volume of the existing guqin resonance box.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a double-beam guqin, including a resonance box, the body of which is composed of a panel and a bottom plate, and a dragon pool and a phoenix pond are arranged on the bottom plate, and the innovation thereof lies in:

[0009] Two upper sound beams are arranged in the resonance box, and the upper sound beams are long strip-shaped sound beam components. One side of the two upper sound beams is tightly fixed on the inner wall of the panel, and the other side of the two upper sound beams is suspended in the resonance box relative to the bottom plate. The length direction of the two upper sound beams is consistent with the length direction of the resonance box. When viewed in the width direction of the resonance box, the two upper sound beams are parallel and separated by a distance.

[0010] A first groove is provided on the inner wall of the panel, 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, 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 upper sound beams, and the length direction of the second groove is consistent with the length direction of the upper sound beams; the first groove spans the two upper sound beams in the width direction of the resonance box and forms an upper transverse sound tunnel on the inner wall of the panel, and the second groove forms an upper longitudinal sound tunnel on the inner wall of the panel.

[0011] The relevant contents in the above technical solution are explained as follows:

[0012] 1. In the above scheme, the theme is "Guqin", and the innovation is focused on the "resonance box" of Guqin, so there is no description of the strings, Qinwei, Yueshan, Feitou, Yanzu, Zhenzi, Zhenchi, Zhenhu, etc. except the resonance box. It can be considered that the other structures of Guqin except the resonance box in the present invention are realized by using existing technology.

[0013] 2. In the above scheme, the "resonance box" refers to the body of the guqin composed of the panel and the bottom plate. The length direction of the guqin resonance box refers to the direction roughly consistent with the strings, and the width direction of the resonance box is the direction perpendicular to the length direction. The "inner wall" for the resonance box refers to the inner wall surface, for example, the inner wall of the panel refers to the wall surface on the inner side of the panel of the resonance box, and the inner wall of the bottom plate refers to the wall surface on the inner side of the bottom plate of the resonance box.

[0014] 3. In the above scheme, two lower sound beams can be provided in the resonance box, and the lower sound beams are long strip-shaped sound beam components. One side of the two lower sound beams is tightly fixed on the inner wall of the bottom plate, and the other side of the two lower sound beams is suspended in the resonance box relative to the panel. The length direction of the two lower sound beams is consistent with the length direction of the resonance box. In the width direction of the resonance box, the two lower sound beams are parallel and separated by a distance.

[0015] A third groove is provided on the inner wall of the bottom plate, and the third groove is opened along the width direction of the resonance box; a fourth groove is provided on the inner wall of the bottom plate, and the fourth groove is opened along the length direction of the resonance box; the third groove and the fourth groove are cross-arranged on the inner wall of the bottom plate and are interconnected, wherein the fourth groove is located between the two lower sound beams, and the length direction of the fourth groove is consistent with the length direction of the lower sound beams; the third groove spans the two lower sound beams in the width direction of the resonance box and forms a lower horizontal sound tunnel on the inner wall of the bottom plate, and the fourth groove forms a lower longitudinal sound tunnel on the inner wall of the bottom plate.

[0016] 4. In the above scheme, a transverse beam can be provided in the resonance box. The transverse beam is in the shape of a plate, arranged at the position of the first groove, and symmetrical with respect to the center plane of the second groove. The top of the transverse beam is fixedly connected to the panel, the bottom of the transverse beam is fixedly connected to the bottom plate, and the side of the transverse beam is fixedly connected to the side plate on the corresponding side.

[0017] 5. In the above scheme, an upper bridge hole can be provided on the upper sound beam, the upper bridge hole is a hole on one side of the upper sound beam and forms an upper bridge-type sound beam structure, and the upper bridge hole is mounted on the first groove. A lower bridge hole can also be provided on the lower sound beam, the lower bridge hole is a hole on one side of the lower sound beam and forms a lower bridge-type sound beam structure, and the lower bridge hole is mounted on the third groove.

[0018] 6. In the above solution, an upper reinforcing plate may be fixedly mounted between the two upper sound beams, and a lower reinforcing plate may be fixedly mounted between the two lower sound beams.

[0019] 7. In the above scheme, the transverse sound beam is arranged in the horizontal direction in the resonance box, and a through hole is opened in the center of the transverse sound beam. A first notch is provided on the side where the transverse sound beam is connected to the panel, and a first crescent hole is formed between the first notch and the inner wall of the panel in the assembled state; a second notch is provided on the side where the transverse sound beam is connected to the bottom plate, and a second crescent hole is formed between the second notch and the inner wall of the bottom plate in the assembled state.

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

[0021] The design principle and concept of the present invention are: for the guqin, there are many factors that affect its penetration, volume and pronunciation effect, such as the material, thickness, internal structure and so on of the resonance box. In order to solve the problems of poor resonance effect, insufficient penetration and low volume of the existing guqin resonance box, the present invention has made a thorough improvement mainly from the perspective of the internal structure of the resonance box. It is specifically embodied in the following aspects: first, the two sound beams arranged front and back on the inner wall of the panel are cancelled, and two upper sound beams are fixed and arranged in parallel on the inner wall of the panel; second, grooves (i.e., the first groove and the second groove) are opened on the inner wall of the panel, and the grooves form an upper horizontal sound tunnel and an upper longitudinal sound tunnel on the inner wall of the panel. Aiming at the problems of poor resonance effect, insufficient penetration and low volume of the guqin resonance box, the present invention has conducted in-depth discussions and research on the resonance box structure and sound generation mechanism of the guqin, and found that the main reason why there is only string sound but no piano sound when the guqin is played is that the resonance box design is unreasonable, resulting in the inability to exert good sound wave resonance and vibration during performance. Based on this, the inventor broke the constraints of the traditional guqin's resonance box design and boldly proposed the improved design scheme of the present invention, which solved the problems of the guqin's poor resonance effect, penetration and low volume from the perspectives of vibration, resonance and sound generation. Practice has proved that the improved design scheme has outstanding substantive characteristics and remarkable technological 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 existing guqin resonance box (described in detail with the content of the best implementation mode, i.e., the embodiment of the present invention):

[0023] 1. The present invention is provided with a double sound beam structure in the center of both the panel and the bottom plate (i.e., two upper sound beams are arranged in parallel on the inner wall of the panel, and two lower sound beams are arranged in parallel on the inner wall of the bottom plate). Since the amplitude of the bass is relatively larger and the frequency is lower than that of the treble, the bass resonance is concentrated in the central area of the resonance box, and the treble resonance is concentrated in the peripheral edge area of the resonance box. This strengthens the strength of the central areas of the panel and the bottom plate, and plays an important role in improving the timbre, penetration power and volume in the bass area. Since the thicknesses of both the panel and the bottom plate are of a gradually changing structure with the central area being thick and the periphery being thin, the strength of the central areas of the panel and the bottom plate is strengthened. Relatively speaking, the thickness difference between the central area and the peripheral edge area of the resonance box is changed, which plays a good role in improving the timbre, penetration power and volume in the treble area. From the perspectives of vibration, resonance and sound production, it is also beneficial for the resonance box to exert the resonance effect, improve the timbre, increase the penetration power and emit a louder volume.

[0024] 2. The present invention has a "Feng" - shaped groove (i.e., the first groove and the second groove) opened on the inner wall of the panel. This "Feng" - shaped groove actually forms a "Feng" - shaped sound tunnel on the inner wall of the panel. At the same time, a "Feng" - shaped groove (i.e., the third groove and the fourth groove) is opened on the inner wall of the bottom plate. This "Feng" - shaped groove actually forms a "Feng" - shaped sound tunnel on the inner wall of the bottom plate. Since the amplitude of the bass is relatively larger and the frequency is lower than that of the treble, the bass resonance is concentrated in the central area of the resonance box, and the treble resonance is concentrated in the peripheral edge area of the resonance box. The vibration of the strings is collected from the central area where the sound tunnels cross, and is quickly transmitted to the periphery of the resonance box through the two upper and lower "Feng" - shaped sound tunnels (i.e., the tunnels of sound). This plays a key role in improving the resonance effect of the guqin resonance box, improving the timbre in the treble area, increasing the penetration power and emitting a louder volume. At the same time, it also plays a good role in improving the timbre, increasing the penetration power and emitting a louder volume in the bass area.

[0025] 3. The present invention designs the sound beam into a bridge - type sound beam structure. In particular, there is a hole defect designed on one side of the sound beam, making the sound beam 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 is also more conducive to the resonance of the resonance box.

[0026] 4. The present invention adopts the design of a transverse sound beam. When the resonance box is viewed from above, three groups of transverse sound beams and two upper sound beams are combined to divide the space corresponding to the inner wall of the panel into eight resonance areas. At the same time, three groups of transverse sound beams and two lower sound beams are combined to divide the space corresponding to the inner wall of the bottom plate into eight resonance areas, totaling sixteen resonance areas. When the guqin is played, the vibration of the strings is first transmitted to the cross center area of ​​the sound tunnel, and then transmitted to the sixteen resonance areas through the sound tunnel, and resonance and vibration are generated, thereby amplifying the string sound into the resonance sound of the resonance box. Before the improvement, only three sound wave quantities can be generated when the guqin is played, that is, the resonance box of the guqin has only one resonance area, one resonance area generates one sound wave quantity, plus one string wave quantity, plus one firing wave quantity, totaling three sound wave quantities. After the improvement, the guqin of the present invention can generate eighteen sound wave quantities when it is played, among which sixteen resonance areas generate sixteen sound wave quantities, plus one string wave quantity, plus one firing wave quantity, totaling eighteen sound wave quantities. The sound wave quantity is the number of sound waves. For a plucked instrument with a specific resonance box, in addition to a string wave quantity and a percussion wave quantity, it mainly depends on the number of resonance areas in the resonance box. Usually, when the instrument is played, each resonance area generates a sound wave quantity, and the number of sound waves generated depends on the number of resonance areas. In addition, the sound wave quantity directly affects the timbre, penetration and volume of the instrument. Therefore, the design of the present invention can significantly improve the timbre of the high and low pitch areas, and increase the penetration and volume of the high and low pitch areas.

[0027] 5. The through holes on the transverse sound beam of the present invention and the crescent holes between the transverse sound beam and the top plate and bottom plate are channels between various 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 an upper reinforcing plate between two upper sound beams and a lower reinforcing plate between two lower sound beams, which can increase the strength of the middle area of ​​the panel and the bottom plate, especially between the upper sound beams and between the lower sound beams, and increase the load when the two upper sound beams and the two lower sound beams resonate, further improving the timbre of the bass area, improving the penetration and volume, and strengthening the central area of ​​the resonance box, which relatively widens the strength gap with the peripheral areas of the resonance box, and is also conducive to improving the timbre of the treble area, improving the penetration and volume.

[0029] 7. The first groove, the second groove, the third groove and the fourth groove of the present invention are all arc-shaped grooves, which can minimize the thickness changes of the panel and the bottom plate, 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-beam structure and opening a groove on the inner wall of the panel are more important than adopting equivalent measures on the inner wall of the bottom plate, and the effect and effect 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

[0031] Attached Figure 1 This is the main view of the existing guqin resonance box;

[0032] Attached Figure 2 This is a bottom view of the existing guqin resonance box;

[0033] Attached Figure 3 for Figure 1 AA section view;

[0034] Attached Figure 4 for Figure 1 BB cross-sectional view;

[0035] Attached Figure 5 The front view of the sound beam inside the existing guqin resonance box;

[0036] Attached Figure 6 Left view of the sound beam inside the existing guqin resonance box;

[0037] Attached Figure 7 This is a schematic diagram of the main structure of the guqin resonance box according to an embodiment of the present invention;

[0038] Attached Figure 8 This is a front view of the inner wall of the panel of the guqin resonance box according to an embodiment of the present invention;

[0039] Attached Fig. 9 This is a front view of the inner wall of the bottom plate of the guqin resonance box according to an embodiment of the present invention;

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

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

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

[0043] Attached Fig.13 It is a left view of the lower sound beam of the guqin according to an embodiment of the present invention;

[0044] Attached Fig.14 for Figure 8 CC section view;

[0045] Attached Fig.15 for Fig.14 A cross-sectional view of the resonance box shell after removing the internal structural parts;

[0046] Attached Fig.16 This is a front view of the transverse sound beam of the guqin according to an embodiment of the present invention;

[0047] Attached Fig.17 It is a left side view of the transverse sound beam of the guqin according to an embodiment of the present invention.

[0048] In the above figures: 1. panel; 2. bottom plate; 3. dragon pool; 4. phoenix pond; 5. sound beam; 6. upper sound beam; 7. lower sound beam; 8. first groove; 9. second groove; 10. third groove; 11. fourth groove; 12. upper bridge hole; 13. lower bridge hole; 16. transverse sound beam; 17. upper reinforcement plate; 18. lower reinforcement plate; 19. first round notch; 20. first crescent hole; 21. second round notch; 22. second crescent hole; 23. through hole. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0050] Embodiment: A double-beam guqin

[0051] The guqin is composed of a resonance box, strings, qin picks, yueshan, fly head, goose foot, pegs, peg pool, peg guard, etc. Since the innovation of the present invention is all concentrated on the resonance box, this embodiment will focus on the structure and construction of the guqin resonance box, while the structures of the strings, qin picks, yueshan, fly head, goose foot, pegs, peg pool, peg guard, etc. can be considered to be realized by using existing technologies and will not be described in detail in this embodiment.

[0052] The structure and construction of the guqin resonance box of this embodiment are as follows: Figure 7-17 As shown, the body of the resonance box is composed of a panel 1 and a bottom plate 2 (see Fig.15 ), a dragon pool 3 and a phoenix pond 4 are arranged on the bottom plate 2.

[0053] The resonance box is provided with two upper sound beams 6 and two lower sound beams 7 (see Fig.14 ), the upper sound beam 6 and the lower sound beam 7 are both long strip sound beam components (see Figure 10-13 The upper sound beam 6 is provided with an upper bridge hole 12, which is a hole on one side of the upper sound beam 6 and forms an upper bridge type sound beam structure. The upper bridge hole 12 is mounted on the first groove 8 (see Figure 8 The lower sound beam 7 is provided with a lower bridge hole 13, which is a hole on one side of the lower sound beam 7 and forms a lower bridge type sound beam structure. The lower bridge hole 13 is mounted on the third groove 10 (see Fig. 9). One side of each of the two upper sound beams 6 is closely fixed to the inner wall of the panel 1, and the other side of each of the two upper sound beams 6 is suspended in the resonance box relative to the bottom plate 2. The length directions of the two upper sound beams 6 are the same as the length direction of the resonance box. When viewed in the width direction of the resonance box, the two upper sound beams 6 are arranged in parallel and separated by a certain distance (see Figure 8 ). One side of each of the two lower sound beams 7 is closely fixed to the inner wall of the bottom plate 2, and the other side of each of the two lower sound beams 7 is suspended in the resonance box relative to the panel 1. The length directions of the two lower sound beams 7 are the same as the length direction of the resonance box. When viewed in the width direction of the resonance box, the two lower sound beams 7 are arranged in parallel and separated by a certain distance (see Fig. 9 ).

[0054] Three first grooves 8 are provided on the inner wall of the panel 1 (see Figure 8 ). The three first grooves 8 are all opened along the width direction of the resonance box, and the three first grooves 8 are arranged at intervals in the length direction of the resonance box. At the same time, a second groove 9 is provided on the inner wall of the panel 1. The second groove 9 is opened along the length direction of the resonance box, and the second groove 9 is located at the central position in the width direction of the resonance box (see Figure 8 ). The three first grooves 8 and the second groove 9 form a "丰" - shaped groove on the inner wall of the panel 1 and are mutually connected (see Figure 8 ). Among them, the second groove 9 is located between the two upper sound beams 6, and the length direction of the second groove 9 is the same as the length direction of the upper sound beam 6. The three first grooves 8 span across the two upper sound beams 6 in the width direction of the resonance box and form three upper transverse sound tunnels on the inner wall of the panel 1. The second groove 9 forms an upper longitudinal sound tunnel on the inner wall of the panel 1.

[0055] The length of the first groove 8 is less than the length of the panel 1 at the corresponding position of the first groove 8 (see Figure 8 ). 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 (see Figure 8 ). Smooth transition surfaces are provided between the two ends of the second groove 9 and the inner wall of the panel 1.

[0056] Three third grooves 10 are provided on the inner wall of the bottom plate 2 (see Fig. 9 ). The three third grooves 10 are all opened along the width direction of the resonance box, and the three third grooves 10 are arranged at intervals in the length direction of the resonance box. At the same time, a fourth groove 11 is provided on the inner wall of the bottom plate 2 (see Fig. 9 ). The fourth groove 11 is opened along the length direction of the resonance box, and the fourth groove 11 is located at the central position in the width direction of the resonance box. The three third grooves 10 and the fourth groove 11 form a "丰" - shaped groove on the inner wall of the bottom plate 2 and are mutually connected (see Fig. 9), wherein the fourth groove 11 is located between two lower sound beams 7, and the length direction of the fourth groove 11 is the same as that of the lower sound beam 7. The three third grooves 10 span across the two lower sound beams 7 in the width direction of the resonance box and form three lower transverse sound tunnels on the inner wall of the bottom plate 2, and the fourth groove 11 forms a lower longitudinal sound tunnel on the inner wall of the bottom plate 2.

[0057] The length of the third groove 10 is less than the length of the bottom plate 2 at the corresponding position of the third groove 10 (see Fig. 9 ), and smooth transition surfaces are provided between both ends of the third groove 10 and the inner wall of the bottom plate 2. The length of the fourth groove 11 is less than the length of the bottom plate 2 at the corresponding position of the fourth groove 11, and smooth transition surfaces are provided between both ends of the fourth groove 11 and the inner wall of the bottom plate 2 (see Fig. 9 ).

[0058] The "Feng" - shaped grooves on the inner wall of the panel 1 and the "Feng" - shaped grooves on the inner wall of the bottom plate 2 are corresponding in position in the height direction of the resonance box. Six transverse sound beams 16 are respectively provided at six positions of the left - half parts and right - half parts of the three horizontal parts in the "Feng" - shaped grooves (see Figure 8 ), and these six transverse sound beams 16 are all plate - shaped (see Fig.16 and Fig.17 ), wherein the top of each transverse sound beam 16 is fixedly connected to the panel 1, and the bottom is fixedly connected to the bottom plate 2 (see Fig.14 ). The transverse sound beams 16 are arranged transversely in the resonance box, and through holes 23 are provided in the center of the transverse sound beams 16 (see Fig.16 ). A first circular notch 19 is provided on the side of the transverse sound beam 16 connected to the panel 1 (see Fig.16 ), and a first crescent - shaped hole 20 is formed between the first circular notch 19 and the inner wall of the panel 1 in the assembled state (see Fig.14 ). A second circular notch 21 is provided on the side of the transverse sound beam 16 connected to the bottom plate 2 (see Fig.16 ), and a second crescent - shaped hole 22 is formed between the second circular notch 21 and the inner wall of the bottom plate 2 in the assembled state (see Fig.14 ).

[0059] An upper reinforcing plate 17 can be fixedly installed between the two upper sound beams 6 (see Figure 8 and Fig.14 ), and similarly, a lower reinforcing plate 18 can also be fixedly installed between the two lower sound beams 7 (see Fig. 9 and Fig.14 ). It is optimal that the first groove 8, the second groove 9, the third groove 10, and the fourth groove 11 are all arc - shaped grooves.

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

[0061] 1. In the above embodiment, the two upper beams 6 are parallel and juxtaposed in the width direction of the resonance box (see Fig.14 ). The two lower beams 7 are parallel and juxtaposed (see Fig.14 ). However, the present invention is not limited thereto, and the two upper sound beams 6 do not necessarily have to be parallel, and the two lower sound beams 7 do not necessarily have to be parallel, but parallel arrangement is optimal, which is easily understood and accepted by those skilled in the art.

[0062] 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. However, the present invention is not limited to this. The double-tone beams and grooves on the inner wall of the bottom plate 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 panel 1, but the effect is slightly worse. For the guqin resonance box, 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.

[0063] 3. In the above embodiments, a double beam structure is provided on the inner wall of the panel 1 and the bottom plate 2. That is, two upper beams 6 are provided on the panel 1, and two lower beams 7 are provided on the bottom plate 2. However, the present invention is not limited thereto, and the two upper beams 6 can be changed in form to four upper beams 6 used in parallel. For the present invention, although the four upper beams 6 and the two upper beams 6 are different in number and form, they are essentially the same. Assuming that the two outer beams of the four upper beams 6 are close to the two inner beams, it can be equivalent to a double beam. Therefore, it can be considered that this change does not bring unexpected effects and should be understood as being substantially equivalent. Similarly, the double beam structure on the bottom plate 2 should also include such a change. In the present invention, the double beam includes the meaning of symmetrical arrangement of even-numbered beams, so the symmetrical arrangement of six beams is also an equivalent variation of the present invention. This is easy to understand for those skilled in the art.

[0064] 4. In the above embodiment, the inner wall of the panel 1 is provided with three first grooves 8 (see Figure 8 ), three third grooves 10 are provided on the inner wall of the bottom plate 2 (see Fig. 9 ). However, the present invention is not limited thereto, and the number of the first groove 8 and the third groove 10 can be one, two, four or five, etc. Such changes can be determined according to actual conditions. In essence, the number of the first groove 8 and the third groove 10 is at least one.

[0065] 5. In the above embodiment, six transverse beams 16 (see Figure 8 ). Among them, the six transverse beams 16 are divided into three groups, and the two transverse beams 16 in each group are bilaterally symmetrical with respect to the center plane of the second groove 9 (see Figure 8), but the present invention is not limited to this, each group of two transverse beams 16 can be combined into one transverse beam 16 by being connected to each other, which is easily understood and accepted by those skilled in the art.

[0066] 6. In the above embodiment, an upper bridge hole 12 is provided on the upper sound beam 6, and a lower bridge hole 13 is provided on the lower sound beam 7. However, the present invention is not limited thereto, and the upper bridge hole 12 and the lower bridge hole 13 may not be provided, or even only one of the upper sound beam 6 and the lower sound beam 7 may be provided with a bridge hole. This is easily understood and accepted by those skilled in the art.

[0067] 7. In the above embodiment, an upper reinforcing plate 17 is fixedly mounted between the two upper sound beams 6 (see Figure 8 and Fig.14 ), a lower reinforcement plate 18 is fixedly mounted between the two lower sound beams 7 (see Fig. 9 and Fig.14 ). However, the present invention is not limited thereto, and the upper reinforcing plate 17 may not be provided, and the two upper sound beams 6 may be suspended in the resonance box. Similarly, the lower reinforcing plate 18 may not be provided, and the two lower sound beams 7 may be suspended in the resonance box. The upper reinforcing plate 17 and the lower reinforcing plate 18 may increase the strength of the middle area of ​​the front panel and the back panel, especially between the upper sound beams and between the lower sound beams, and may increase the load when the two upper sound beams and the two lower sound beams resonate.

[0068] 8. In the above embodiments, the first groove 8, the second groove 9, the third groove 10 and the fourth groove 11 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. This is easily understood and accepted by those skilled in the art.

[0069] 9. In the above embodiment, from the cross section of the resonance box, the two lower sound beams 7 and the two upper sound beams 6 are arranged in a corresponding position in the vertical direction (see Fig.14 ). 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.

[0070] 10. In the above embodiment, the two upper sound beams 6 have the same shape and size (see Fig.10 The two lower sound beams 7 have the same shape and size (see Fig.12 ). However, the present invention is not limited thereto, and the shapes and sizes of the two upper sound beams 6 may be different, and the shapes and sizes of the two lower sound beams 7 may also be different. Specifically, it can be determined when the resonance box is debugging the timbre and sound quality. This is easily understood and accepted by those skilled in the art.

[0071] 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 guqin, comprising a resonance box, the body of which is composed of a panel (1) and a bottom plate (2), the bottom plate (2) being provided with a dragon pool (3) and a phoenix pond (4), characterized in that: Two upper sound beams (6) are arranged in the resonance box, the upper sound beams (6) are long strip-shaped sound beam components, one side of the two upper sound beams (6) is tightly fixed to the inner wall of the panel (1), and the other side of the two upper sound beams (6) is suspended in the resonance box relative to the bottom plate (2), the length direction of the two upper sound beams (6) is consistent with the length direction of the resonance box, and the two upper sound beams (6) are parallel and separated by a distance when viewed in the width direction of the resonance box; A first groove (8) is provided on the inner wall of the panel (1), 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), 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 mutually connected, wherein the second groove (9) is located between the two upper sound beams (6), and the length direction of the second groove (9) is consistent with the length direction of the upper sound beam (6); the first groove (8) spans the two upper sound beams (6) in the width direction of the resonance box 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); A transverse sound beam (16) is provided in the resonance box. The transverse sound beam (16) is in the shape of a plate. The transverse sound beam (16) is arranged at the position of the first groove (8) and is bilaterally symmetrical with respect to the central plane of the second groove (9). The top of the transverse sound beam (16) is fixedly connected to the panel (1), the bottom of the transverse sound beam (16) is fixedly connected to the bottom plate (2), and the side of the transverse sound beam (16) is fixedly connected to the side plate (3) on the corresponding side. The transverse sound beams (16) are divided into a plurality of groups, and the two transverse sound beams (16) in each group are bilaterally symmetrical with respect to the central plane of the second groove (9) as a reference, and the two transverse sound beams (16) in each group can be connected to each other and combined into one transverse sound beam (16).

2. The guqin according to claim 1, characterized in that: Two lower sound beams (7) are arranged in the resonance box, the lower sound beams (7) being long strip-shaped sound beam components, one side of the two lower sound beams (7) being closely fixed to the inner wall of the bottom plate (2), the other side of the two lower sound beams (7) being suspended in the resonance box relative to the panel (1), the length direction of the two lower sound beams (7) being consistent with the length direction of the resonance box, and the two lower sound beams (7) being arranged side by side and spaced a certain distance apart in the width direction of the resonance box; A third groove (10) is provided on the inner wall of the bottom plate (2), and the third groove (10) is opened along the width direction of the resonance box; a fourth groove (11) is provided on the inner wall of the bottom plate (2), and the fourth groove (11) is opened along the length direction of the resonance box; the third groove (10) and the fourth groove (11) are cross-arranged on the inner wall of the bottom plate (2) and are interconnected, wherein the fourth groove (11) is located between the two lower sound beams (7), and the length direction of the fourth groove (11) is consistent with the length direction of the lower sound beam (7); the third groove (10) spans the two lower sound beams (7) in the width direction of the resonance box and forms a lower transverse sound tunnel on the inner wall of the bottom plate (2), and the fourth groove (11) forms a lower longitudinal sound tunnel on the inner wall of the bottom plate (2).

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

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

5. The guqin according to claim 1, characterized in that: The length of the first groove (8) is smaller than the length of the panel (1) at a position corresponding to the first groove (8), and smooth transition surfaces are provided between both 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) at a position corresponding to the second groove (9), and smooth transition surfaces are provided between both ends of the second groove (9) and the inner wall of the panel (1).

6. The guqin according to claim 2, characterized in that: The length of the third groove (10) is smaller than the length of the bottom plate (2) at a position corresponding to the third groove (10), and smooth transition surfaces are provided between both ends of the third groove (10) and the inner wall of the bottom plate (2); the length of the fourth groove (11) is smaller than the length of the bottom plate (2) at a position corresponding to the fourth groove (11), and smooth transition surfaces are provided between both ends of the fourth groove (11) and the inner wall of the bottom plate (2).

7. The guqin according to claim 1, characterized in that: The transverse sound beam (16) is arranged in a lateral direction in the resonance box, and a through hole (23) is provided at the center of the transverse sound beam (16).

8. The guqin according to claim 7, characterized in that: A first notch (19) is provided on the side where the transverse tone beam (16) is connected to the panel (1), and a first crescent hole (20) is formed between the first notch (19) and the inner wall of the panel (1) in an assembled state; a second notch (21) is provided on the side where the transverse tone beam (16) is connected to the bottom plate (2), and a second crescent hole (22) is formed between the second notch (21) and the inner wall of the bottom plate (2) in an assembled state.

9. The guqin according to claim 2, characterized in that: The first groove (8), the second groove (9), the third groove (10) and the fourth groove (11) are all arc-shaped grooves.

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