A double-beam violin without a sound post

Abstract

A double-beam violin without a sound post includes a resonance box, which is composed of a panel, a bottom plate and a side plate, and is characterized in that: two upper sound beams are fixedly arranged in parallel on the inner wall of the panel; two lower sound beams are fixedly arranged in parallel on the inner wall of the bottom plate; an upper cross-shaped groove is provided on the inner wall of the panel, and the upper cross-shaped groove forms an upper cross-shaped sound tunnel on the inner wall of the panel; a lower cross-shaped groove is provided on the inner wall of the bottom plate, and the lower cross-shaped groove forms a lower cross-shaped sound tunnel on the inner wall of the bottom plate. This scheme breaks the constraints of the traditional bass beam and sound post design in the violin resonance box, cancels the sound post in the violin resonance box, and boldly proposes a new improved design scheme, which solves the problem that the high pitch area of ​​the violin is not bright, and the bass area is not thick and round enough, so that the existing violin resonance box can well take into account the high, middle and bass areas and have good timbre.

Description

Technical Field

[0001] The present invention relates to a bowed string instrument, in particular to a double-beam violin without a sound post. The so-called violin refers to a violin, a viola, a cello, a double bass (bass), a children's violin, etc. Background Art

[0002] The violin is one of the typical representatives of Western musical instruments. It is widely spread in countries around the world and is the most important instrument in the string section of the modern orchestra. It occupies an extremely important position in instrumental music and is the backbone of the modern symphony orchestra. The violin can be roughly divided into violin, viola, cello and double bass (bass). These four instruments belong to the violin series and have many similarities in appearance, structure and construction, but the differences are too numerous to mention, such as size, playing method, etc.

[0003] A violin is usually composed of a resonance box (sound box), a headstock, a fingerboard, strings, a bridge, a chin rest, a string block, and pegs. The resonance box (sound box) is an important part that determines the quality of the violin's sound. Figure 1 and 2 As shown, a typical violin resonance box is composed of a panel 1, a bottom plate 2, a side plate 3, a bass beam 4, and a sound column 5, wherein the panel 1, the bottom plate 2 and the side plate 3 constitute the box shell of the resonance box, the bass beam 4 is bonded and fixed to the inner wall of the panel 1, and is located at the position of the bass foot of the bridge, and the sound column 5 is vertically supported between the panel 1 and the bottom plate 2, and is located at the position of the treble foot of the bridge. The range of a violin is usually four and a half octaves, wherein the treble area accounts for a quarter of the violin range, the middle area accounts for a half of the violin range, and the bass area accounts for a quarter of the violin range. At present, due to the limitations of traditional bass beams and sound columns, the common problem of violins is that the timbre of the treble and bass areas is not good, and the timbre effect that the violin should have is not brought into play. The specific performance is that the treble area is not bright, and the bass area is not thick and round enough. The main reason is that the current violin resonance box cannot meet the good broadband vibration from the treble area to the bass area, that is, it cannot simultaneously adapt to the resonance and vibration of the wide frequency changes in the treble area, the middle area and the bass area. Further research shows that there are many factors that affect broadband vibration in the resonance box. In addition to the panel and the bottom plate, the main factors are the bass beam and the sound column. However, the design of the bass beam and the sound column of the existing resonance box is unreasonable, which is not conducive to the resonance box to play a good sound wave resonance and vibration from the high pitch area to the low pitch area. For example, the sound column is supported between the panel and the bottom plate in the resonance box and is located at the position of the treble foot of the bridge. It mainly plays a mechanical role but does not play a good acoustic role. The bass beam is fixed to the bottom surface of the panel in the resonance box and is located at the position of the bass foot of the bridge, and it does not play a good acoustic role.

[0004] In view of this, how to improve the resonance box of the existing violin, especially the improvement of the bass beam and the sound column in the resonance box is the subject of the present invention. Summary of the invention

[0005] The invention provides a double-beam violin without a sound post, and aims to solve the problem that the existing violin resonance box cannot take into account the high, middle and low frequency ranges and have good resonance timbre at the same time.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a double-beam violin without a sound post, including a resonance box, the shell of which is composed of a front panel, a bottom panel and a side panel, and its innovation lies in:

[0007] 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.

[0008] A first groove and a second groove are provided on the inner wall of the panel, and the first groove and the second groove are cross-arranged and interconnected on the inner wall of the panel, 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.

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

[0010] 1. In the above scheme, the theme is "violin", and the innovation is concentrated on the "resonance box" of the violin, so the headstock, fingerboard, strings, bridge, chin rest, string assembly, string pegs, etc. other than the resonance box are not described. It can be considered that the other structures of the violin of the present invention except the resonance box are realized by using the existing technology.

[0011] 2. In the above scheme, the "resonance box" is also called the sound box or the body of the violin. The length direction of the violin resonance box is roughly consistent with the strings, and the width direction of the resonance box is 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.

[0012] 3. In the above scheme, two lower sound beams can also 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 closely fixed on the inner wall of the bottom plate, and the other side of the two lower sound beams is closely 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. At the same time, a third groove and a fourth groove are opened on the inner wall of the bottom plate. The third groove and the fourth groove are arranged crosswise on the inner wall of the bottom plate and interpenetrate each other, 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 crosses the two lower sound beams in the width direction of the resonance box and forms a lower transverse sound tunnel on the inner wall of the bottom plate, and the fourth groove forms a lower longitudinal sound tunnel on the inner wall of the bottom plate.

[0013] 4. In the above solution, a support column may be provided at the intersection of the first groove and the upper sound beam, with one end of the support column resting on the bottom of the first groove and the other end resting on the upper sound beam.

[0014] 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.

[0015] 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.

[0016] 7. In the above scheme, the length of the first groove is less than the length of the panel at the position corresponding to the first groove, and smooth transition surfaces are provided between the two ends of the first groove and the inner wall of the panel; the length of the second groove is less than the length of the panel at the position corresponding to the second groove, and smooth transition surfaces are provided between the two ends of the second groove and the inner wall of the panel. The length of the third groove is less than the length of the bottom plate at the position corresponding to the third groove, and smooth transition surfaces are provided between the two ends of the third groove and the inner wall of the bottom plate; the length of the fourth groove is less than the length of the bottom plate at the position corresponding to the fourth groove, and smooth transition surfaces are provided between the two ends of the fourth groove and the inner wall of the bottom plate.

[0017] 8. In the above solution, the thickness of the panel and the bottom plate are both of a thickness gradient structure, thick in the central area and thin around.

[0018] 9. In the above scheme, the first groove, the second groove, the third groove and the fourth groove are all arc grooves.

[0019] The design principle and concept of the present invention are: in order to solve the problem that the existing violin resonance box cannot take into account the high, middle and low ranges and have good resonance timbre at the same time, the present invention thoroughly improves the design of the existing violin resonance box, especially the bass beam and the sound column in the resonance box. It is specifically embodied in the following aspects: first, the original sound column design is cancelled; second, the original bass beam fixed on the inner wall of the panel is changed to two upper sound beams fixed and arranged in parallel on the inner wall of the panel; third, an upper cross-shaped groove (i.e., the first groove and the second groove) is opened on the inner wall of the panel, and the upper cross-shaped groove forms an upper horizontal sound tunnel and an upper longitudinal sound tunnel on the inner wall of the panel. Aiming at the problem that the treble area of ​​the existing violin is not bright, and the bass area is not thick and round enough, the present invention conducts in-depth discussion and research on the design of the violin resonance box, especially the bass beam and the sound column inside the resonance box, and the sound generation mechanism, and finds out that the main reason for the poor timbre of the existing violin treble and bass areas is due to the unreasonable design of the bass beam and the sound column in the resonance box. Based on this, the inventor broke the constraints of traditional bass beam and sound post designs in the violin resonance box, and boldly proposed the improved design scheme of the present invention. This improved design scheme changes the previous free vibration mode of the resonance box into the current standard vibration mode, and solves the problems of the violin's high pitch not being bright and the low pitch not being thick and round enough from the perspective of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantive characteristics and remarkable technical progress, and has achieved obvious technical effects.

[0020] Due to the application of the above technical solution, the present invention has the following advantages and effects compared with the existing violin resonance box (described in detail with the best implementation mode, i.e., the content of the embodiment of the present invention):

[0021] 1. The present invention eliminates the sound column, and a double sound beam structure is set in the center of the panel and the bottom plate (that is, two upper sound beams are set in parallel on the inner wall of the panel, and two lower sound beams are set in parallel on the inner wall of the bottom plate). Since the bass has a larger amplitude and lower frequency than the treble, the bass resonance is concentrated in the central area of ​​the resonance box, and the treble resonance is concentrated in the surrounding edge areas of the resonance box. Strengthening the strength of the central area of ​​the panel and the bottom plate plays an important role in improving the timbre and sound quality of the bass area. Since the thickness of the violin's panel and bottom plate are both thick in the central area and thin around the edges, the strength of the central area of ​​the panel and the bottom plate is strengthened, and the thickness difference between the central area and the surrounding edge areas of the resonance box is relatively changed, which plays a good role in improving the timbre and sound quality of the treble area.

[0022] 2. The present invention has an upper cross-shaped groove (i.e., the first groove and the second groove) on the inner wall of the panel, and the upper cross-shaped groove actually forms an upper cross-shaped sound tunnel on the inner wall of the panel. At the same time, a lower cross-shaped groove (i.e., the third groove and the fourth groove) is provided on the inner wall of the bottom plate, and the lower cross-shaped groove actually forms a lower cross-shaped sound tunnel on the inner wall of the bottom plate. Since the bass has a larger amplitude and a lower frequency than the treble, the bass resonance is concentrated in the central area of ​​the resonance box, and the treble resonance is concentrated in the surrounding edge areas of the resonance box. The string vibration is collected by the central area of ​​the cross-shaped sound tunnel and quickly transmitted to the surrounding areas of the resonance box through the upper cross-shaped sound tunnel and the lower cross-shaped sound tunnel (i.e., the sound tunnel), which plays a key role in improving the timbre and sound quality of the treble area, and also plays a good role in improving the timbre and sound quality of the bass area.

[0023] 3. The combined design of the double sound beam and the cross-shaped sound tunnel of the present invention divides the space corresponding to the resonance box panel into four resonance areas in a top view, and at the same time, divides the space corresponding to the bottom plate of the resonance box into four resonance areas, for a total of eight resonance areas. When the violin is played, the vibration of the strings is first transmitted to the central area where the sound tunnels intersect, and then transmitted to the eight resonance areas through the sound tunnels, and resonance and vibration are generated, thereby amplifying the string sound into the resonance sound of the resonance box. Before the improvement, only four sound waves can be generated when the violin is played, that is, the space corresponding to the panel forms a resonance area, and the space corresponding to the bottom plate forms a resonance area, for a total of two resonance areas, each resonance area generates a sound wave amount, plus a string wave amount, plus a firing wave amount, for a total of four sound waves. After the improvement, the violin of the present invention can generate ten sound waves when it is played, among which eight resonance areas generate eight sound waves, plus a string wave amount, plus a firing wave amount, for a total of ten sound waves. 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 of the high and low pitch areas.

[0024] 4. The present invention designs the sound beam into a bridge-type sound beam structure, especially a hole is designed on one side of the sound beam, so that the sound beam is like a bridge arch structure. When such a sound beam is erected on the sound tunnel, it is more conducive to the transmission of vibration through the sound tunnel and also more conducive to the resonance of the resonance box.

[0025] 5. The present invention sets a support between the first groove and the upper sound beam, which can strengthen the supporting strength between the panel and the upper sound beam on the one hand, and on the other hand does not hinder the transmission of sound waves from the central area to the surrounding areas through the first groove.

[0026] 6. 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.

[0027] 7. The present invention fixes an upper reinforcing plate between two upper sound beams and a lower reinforcing plate between two lower sound beams, which can increase the strength of the middle area of ​​the 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, improve the timbre of the bass area, and better solve the problem of insufficient richness and roundness in the bass area. On the other hand, the central area of ​​the resonance box is strengthened, and the strength gap with the peripheral areas of the resonance box is relatively widened, which is also conducive to improving the timbre and sound quality of the treble area.

[0028] 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 panel are more important than adopting equivalent measures on the inner wall of the bottom plate, and the effect and result are relatively better. The reason is that the bridge and strings are provided on the panel, while the bottom plate is not directly connected to the bridge and strings. Therefore, setting a double beam structure and opening a groove on the inner wall of the panel is 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 is icing on the cake for the present invention, which is easy to understand for those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Attached Figure 1 It is a cross-sectional view of an existing violin resonance box;

[0030] Attached Figure 2 It is a stereogram of the existing bass beam;

[0031] Attached Figure 3 A cross-sectional view of a violin resonance box according to an embodiment of the present invention;

[0032] Attached Figure 4 A three-dimensional diagram of two upper bridge-type sound beams in a violin resonance box according to an embodiment of the present invention;

[0033] Attached Figure 5 It is a three-dimensional diagram of two lower bridge-type sound beams in the violin resonance box according to an embodiment of the present invention;

[0034] Attached Figure 6 It is a front view of the inner wall of the panel and the upper bridge-type sound beam in the violin resonance box of an embodiment of the present invention;

[0035] Attached Figure 7 for Figure 6 AA section view;

[0036] Attached Figure 8 for Figure 6 BB view;

[0037] Attached Fig. 9 It is a front view of the inner wall of the bottom plate and the lower bridge type sound beam in the violin resonance box of the embodiment of the present invention;

[0038] Attached Fig.10 is a cross-sectional view of a violin resonance box according to an embodiment of the present invention;

[0039] Attached Fig.11 This is a front view of the inner wall of the panel in the violin resonance box according to an embodiment of the present invention;

[0040] Attached Fig.12 This is a front view of the inner wall of the bottom plate in the violin resonance box according to an embodiment of the present invention;

[0041] Attached Fig.13 A cross-sectional view of a resonance box in which an upper reinforcement plate is added between upper sound beams and a lower reinforcement plate is added between lower sound beams of the present invention;

[0042] Attached Fig.14 A front view of the inner wall of the resonance box panel of the present invention in which an upper reinforcement plate is added between the upper sound beams;

[0043] Attached Fig.15 The front view of the inner wall of the bottom plate of the resonance box of the present invention is provided with a lower reinforcing plate between the lower sound beams.

[0044] In the above figures: 1. panel; 2. bottom panel; 3. side panel; 4. bass beam; 5. sound column; 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. pillar; 17. upper reinforcement plate; 18. lower reinforcement plate. DETAILED DESCRIPTION

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

[0046] Embodiment: A double-beam violin without a sound post

[0047] The violin is composed of a resonance box, a headstock, a fingerboard, strings, a bridge, a chin rest, a string assembly, and a string peg. Since the innovation of the present invention is concentrated on the resonance box, this embodiment will focus on describing the structure and construction of the violin resonance box, while the structures of the headstock, the fingerboard, the strings, the bridge, the chin rest, the string assembly, and the string peg can be considered to be realized by using the existing technology and will not be described in detail in this embodiment.

[0048] This embodiment takes the violin resonance box as an example to further describe the structure and construction of the resonance box: Figure 3-12 As shown, the violin resonance box shell is composed of a panel 1, a bottom panel 2 and a side panel 3 (see Figure 3 and Fig.10 ).

[0049] The resonance box is provided with two upper sound beams 6 and two lower sound beams 7 (see Figure 3 ), the upper sound beam 6 and the lower sound beam 7 are both long strip sound beam components (see Figure 4 and Figure 5 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 (see Figure 4 ), 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, and 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 (see Figure 5 ), the lower bridge hole 13 is erected on the third groove 10. One side of the two upper sound beams 6 is closely fixed on the inner wall of the panel 1, and the other side of the two upper sound beams 6 is closely 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. In the width direction of the resonance box, the two upper sound beams 6 are parallel and separated by a distance (see Figure 3 and Figure 6 One side of the two lower sound beams 7 is closely fixed to the inner wall of the bottom plate 2, and one side of the two lower sound beams 7 is closely suspended in the resonance box relative to the panel 1. The length direction of the two lower sound beams 7 is consistent with the length direction of the resonance box. In the width direction of the resonance box, the two lower sound beams 7 are parallel and separated by a distance (see Figure 3 and Fig. 9 ).

[0050] The inner wall of the panel 1 is provided with a first groove 8 and a second groove 9 (see Figure 7 , Figure 8 and Fig.11 ), the first groove 8 and the second groove 9 are cross-intersecting on the inner wall of the panel 1 and are interconnected (see Fig.11 ), 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 (see Figure 6 The first groove 8 spans across 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 (see Figure 6 and Figure 7 ), the second groove 9 forms an upper longitudinal sound tunnel on the inner wall of the panel 1 (see Figure 6 and Figure 8 ).

[0051] A support 16 is provided at the intersection of the first groove 8 and the upper sound beam 6, one end of the support 16 is against the bottom of the first groove 8, and the other end is against the upper sound beam 6 (see Figure 7 ).

[0052] The length of the first groove 8 is smaller than the length of the panel 1 at the position corresponding to the first groove 8, and a smooth transition surface is provided between the two ends of the first groove 8 and the inner wall of the panel 1 (see Fig.11 The length of the second groove 9 is smaller than the length of the panel 1 at the corresponding position of 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 (see Fig.11 ).

[0053] The inner wall of the bottom plate 2 is provided with a third groove 10 and a fourth groove 11 (see Figure 3 and Fig.12 ), the third groove 10 and the fourth groove 11 are cross-intersecting on the inner wall of the bottom plate 2 and are interconnected (see Fig.12 ), wherein the fourth groove 11 is located between the two lower sound beams 7, and the length direction of the fourth groove 11 is consistent with the length direction of the lower sound beam 7 (see Fig. 9 The third groove 10 spans across 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 (see Figure 3 ), the fourth groove 11 forms a lower longitudinal sound tunnel on the inner wall of the base plate 2.

[0054] The length of the third groove 10 is smaller than the length of the bottom plate 2 at the corresponding position of the third groove 10, and a smooth transition surface is provided between the two ends of the third groove 10 and the inner wall of the bottom plate 2 (see Fig.12 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 the two ends of the fourth groove 11 and the inner wall of the bottom plate 2 (see Fig.12 ).

[0055] The thickness of the panel 1 and the bottom plate 2 are both of a thickness gradient structure with a thick center area and thin surrounding areas (see Figure 3 and Figure 7 The first groove 8, the second groove 9, the third groove 10 and the fourth groove 11 are all arc grooves (see Figure 3 , Figure 7 and Figure 8 ). Of the two upper sound beams 6, one is located at a position corresponding to the bass foot of the violin bridge, and the other is located at a position corresponding to the treble foot of the violin bridge (not shown). Observing from the cross section of the resonance box, the two lower sound beams 7 and the two upper sound beams 6 are arranged in a corresponding position in the vertical direction (see Figure 3 The two upper sound beams 6 have the same shape and size (see Figure 4 The two lower sound beams 7 have the same shape and size (see Figure 5 ).

[0056] The following is an explanation of other implementations and structural changes of the present invention:

[0057] 1. In the above embodiments, although the embodiments are given for violin resonance box, the present invention is not limited thereto, and may be viola, cello, double bass (bass), or even children's violin, etc. This is easily understood and accepted by those skilled in the art.

[0058] 2. In the above embodiments, double-tone beam structures and cross-shaped 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 cross-shaped grooves on the inner wall of the bottom plate 2 can be eliminated 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 violin resonance box, the panel 1 is more important than the bottom plate 2. The reason is that the bridge and strings are provided on the panel 1, while the bottom plate 2 is not directly connected to the bridge and strings, which is easy to understand for those skilled in the art.

[0059] 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.

[0060] 4. In the above embodiment, the two upper beams 6 are parallel and juxtaposed in the width direction of the resonance box (see Figure 6 ). The two lower beams 7 are parallel and juxtaposed (see Fig. 9 ). 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.

[0061] 5. In the above embodiments, a support 16 is provided at the intersection of the first groove 8 and the upper sound beam 6, one end of the support 16 is against the bottom of the first groove 8, and the other end is against the upper sound beam 6. However, the present invention is not limited to this, and the support 16 may not be provided. The support 16 may also be provided between the first groove 8 and the upper sound beam 6 and between the third groove 10 and the lower sound beam 7. This is easily understood and accepted by those skilled in the art.

[0062] 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 bridge hole may be provided. This is easily understood and accepted by those skilled in the art.

[0063] 7. In the above embodiment, the two upper sound beams 6 are fixed in parallel on the inner wall of the panel 1, and the two upper sound beams 6 are suspended in the resonance box (see Figure 3 ). However, the present invention is not limited thereto, and an upper reinforcing plate 17 can be fixedly mounted between the two upper sound beams 6 (see Fig.13 and Fig.14 ). Similarly, in the above embodiment, the two lower sound beams 7 are fixed in parallel on the inner wall of the bottom plate 2, and the two lower sound beams 7 are suspended in the resonance box (see Figure 3 ). However, the present invention is not limited thereto, and a lower reinforcing plate 18 can be fixedly mounted between the two lower sound beams 7 (see Fig.13 and Fig.15 The upper reinforcing plate 17 and the lower reinforcing plate 18 can increase the strength of the middle area of ​​the panel and the bottom plate, especially between the upper sound beams and the lower sound beams, and can increase the load when the two upper sound beams and the two lower sound beams resonate.

[0064] 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.

[0065] 9. In the above embodiment, one upper sound beam 6 is located at a position corresponding to the bass foot of the violin bridge, and the other upper sound beam 6 is located at a position corresponding to the treble foot of the violin bridge. However, the present invention is not limited thereto, and these positions may be deviated from, and may be specifically determined according to the timbre and sound quality of the resonance box. This is easily understood and accepted by those skilled in the art.

[0066] 10. 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 Figure 3). However, the present invention is not limited thereto, and the arrangement may not be aligned, and may be specifically determined when the resonance box is debugging the timbre and sound quality. This is easily understood and accepted by those skilled in the art.

[0067] 11. In the above embodiments, the two upper sound beams 6 have the same shape and size (see Figure 4 The two lower sound beams 7 have the same shape and size (see Figure 5 ). 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.

[0068] 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 violin without a sound post, comprising a resonance box, the shell of which is composed of a panel (1), a bottom panel (2) and a side panel (3), 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; The inner wall of the panel (1) is provided with a first groove (8) and a second groove (9), the first groove (8) and the second groove (9) are arranged crosswise on the inner wall of the panel (1) and are interpenetrating with each other, wherein the second groove (9) is located between the two upper sound beams (6), and the length direction of the second groove (9) is consistent with the length direction of the upper sound beam (6); the first groove (8) spans the two upper sound beams (6) in the width direction of the resonance box 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).

2. The violin according to claim 1, characterized in that: Two lower sound beams (7) are arranged in the resonance box, the lower sound beams (7) are long strip-shaped sound beam components, one side of the two lower sound beams (7) is closely fixed to the inner wall of the bottom plate (2), and the other side of the two lower sound beams (7) is closely suspended in the resonance box relative to the panel (1), the length direction of the two lower sound beams (7) is consistent with the length direction of the resonance box, and the two lower sound beams (7) are parallel and separated by a distance when viewed in the width direction of the resonance box; A third groove (10) and a fourth groove (11) are provided on the inner wall of the bottom plate (2); the third groove (10) and the fourth groove (11) are arranged crosswise on the inner wall of the bottom plate (2) and are interconnected; the fourth groove (11) is located between the two lower sound beams (7); the length direction of the fourth groove (11) is consistent with the length direction of the lower sound beams (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 violin according to claim 1, characterized in that: A support (16) is provided at the intersection of the first groove (8) and the upper sound beam (6), one end of the support (16) rests on the bottom of the first groove (8), and the other end rests on the upper sound beam (6).

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

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

6. The violin 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).

7. The violin 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).

8. The violin 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.

9. The violin according to claim 1, characterized in that: Of the two upper sound beams (6), one upper sound beam (6) is located at a position corresponding to the bass foot of the violin bridge, and the other upper sound beam (6) is located at a position corresponding to the treble foot of the violin bridge.

10. The violin according to claim 2, characterized in that: Observing from the cross section of the resonance box, the two lower sound beams (7) and the two upper sound beams (6) are arranged in a corresponding position in the up and down direction.

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