CN212434220U - A fretless two-beam violin - Google Patents

Abstract

A column-less double-sound-beam violin, comprising a resonance box, the resonance box is assembled by a panel, a bottom plate and a side plate, and is characterized in that: two upper sound beams are fixed in parallel on the inner wall of the panel; Two lower sound beams are arranged; an upper cross-shaped groove is formed 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 opened on the inner wall of the bottom plate, and the lower cross-shaped The groove forms a lower cross-shaped sound tunnel on the inner wall of the bottom plate. This scheme breaks the shackles of the traditional bass beam and sound column design in the previous violin resonance box, cancels the sound column in the violin resonance box, and boldly proposes a new improved design scheme to solve the problem that the treble region of the violin is not bright, and the bass region is thick The problem of insufficient roundness makes the existing violin resonator able to take into account the high, middle and low frequency regions with good timbre.

Description

Double-sound-beam violin without sound column

Technical Field

The utility model relates to a bow string musical instrument, in particular to a two sound beam violin of no sound column. Violins are violins, violas, cellos, bass violins (bass), children violins and the like.

Background

Violins are one of typical representatives of western musical instruments. It is widely spread in all countries of the world and is the most important musical instrument in the string music group of modern orchestra. The music instrument plays an extremely important role in instrumental music and is a pillar of a modern symphony band. Violins can be roughly divided into violins, violas, cellos and bass violins (bass), and these four musical instruments belong to the violin series, and have many similarities in appearance, structure and construction, but it is said that differences are not enumerated, such as volume, playing mode, etc.

Violins are generally composed of a resonance box (sound box), a headstock, a fingerboard, strings, a bridge, a chin rest, a string assembly, a peg, and the like, wherein the resonance box (sound box) is an important part for determining whether the quality of the violin is good or bad. Referring to fig. 1 and 2, a typical violin resonator is composed of a panel 1, a bottom plate 2, side plates 3, a bass beam 4 and a sound post 5, wherein the panel 1, the bottom plate 2 and the side plates 3 form a housing of the resonator, the bass beam 4 is bonded and fixed on the inner wall of the panel 1 and is positioned at the position of a bass foot of a bridge, and the sound post 5 is vertically supported between the panel 1 and the bottom plate 2 and is positioned at the position of a treble foot of the bridge. The register of a violin is typically four and a half octaves, with the high pitch region occupying one quarter of the register of the violin, the mid-range region occupying one half of the register of the violin, and the low pitch region occupying one quarter of the register of the violin. The ubiquitous problem of present violin is owing to receive the restriction of traditional bass beam and sound column: the tone colors of the high tone area and the low tone area are not good, and the proper tone color effect of the violin is not exerted. The specific expression is that the high pitch area is not bright, and the low pitch area is not thick and mellow. The main reason for this is that the existing violin resonance box can not satisfy the good wide-frequency vibration from the high-pitch area to the low-pitch area, i.e. can not adapt to the wide frequency variation resonance and vibration of the high-pitch area, the middle-pitch area and the low-pitch area at the same time. Further studies have shown that many factors affect the broadband vibration in the resonator, mainly the bass beam and the sound post, except for the front and bottom plates. The existing resonance box has unreasonable design of the bass beam and the sound column, which is not beneficial to the resonance box to play 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 resonator and is positioned at the position of the treble foot of the bridge, and the sound column mainly plays a mechanical role but does not play a good acoustic role. The bass beam is fixed on the bottom surface of the panel in the resonance box and is positioned on the position of the bridge bass foot, and the good acoustic effect is not exerted.

In view of the above, the present invention is to improve the resonator of the existing violin, and particularly to improve the bass beam and the sound column in the resonator.

Disclosure of Invention

The utility model provides a two sound beam violins of no sound column, its purpose is to solve current violin resonant tank and can't compromise the problem that high, well, bass district possesses good sympathetic response tone quality simultaneously.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a no sound post double tone beam violin, includes the resonant tank, and the case shell of this resonant tank is formed by panel, bottom plate and curb plate amalgamation, and its innovation lies in:

two upper sound beams are arranged in the resonator, the upper sound beams are long-strip-shaped sound beam components, one sides of the two upper sound beams are tightly attached and fixed to the inner wall of the panel, the other sides of the two upper sound beams are suspended in the resonator relative to the bottom plate, the length directions of the two upper sound beams are consistent with the length direction of the resonator, and the two upper sound beams are parallel and separated by a certain distance in the width direction of the resonator.

The inner wall of the panel is provided with a first groove and a second groove, the first groove and the second groove are arranged on the inner wall of the panel in a crossed mode and are communicated with each other, the second groove is located between the two upper sound beams, and the length direction of the second groove is consistent with that of the upper sound beams; two last sound roof beams are transversely striden to first slot in the width direction of resonant tank to horizontal sound tunnel is formed on the inner wall of panel, and vertical sound tunnel is formed on the inner wall of panel to the second slot.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the theme is 'violin', and innovation points are focused on a 'resonance box' of the violin, so that a headstock, a fingerboard, strings, a bridge, a chin rest, a string assembly, tuning pegs and the like outside the resonance box are not described. It can be considered that the utility model discloses except that the resonant tank other structures adopt prior art to realize in the violin.

2. In the above scheme, the "resonance box" is also called a sound box or a body for a violin. The length direction of the violin resonance box is about the same as the strings, and the width direction of the resonance box is a direction perpendicular to the length direction. The term "inner wall" refers to an inner wall surface of the resonator, for example, an inner wall surface of the faceplate refers to a wall surface closer to the inner side of the faceplate of the resonator, and an inner wall surface of the base plate refers to a wall surface closer to the inner side of the base plate of the resonator.

3. In the above scheme, two lower sound beams can be further arranged in the resonator, the lower sound beams are long-strip-shaped sound beam components, one sides of the two lower sound beams are tightly attached and fixed on the inner wall of the bottom plate, the other sides of the two lower sound beams are tightly attached and suspended in the resonator relative to the panel, the length directions of the two lower sound beams are consistent with the length direction of the resonator, and the two lower sound beams are seen in parallel in the width direction of the resonator and are separated by a distance. Meanwhile, a third groove and a fourth groove are formed in the inner wall of the bottom plate, the third groove and the fourth groove are arranged on the inner wall of the bottom plate in a crossed mode and are communicated with each other, the fourth groove is located between the two lower sound beams, and the length direction of the fourth groove is consistent with that of the lower sound beams; the third slot transversely strides two lower sound beams in the width direction of the resonator, and forms a lower transverse sound tunnel on the inner wall of the bottom plate, and the fourth slot forms a lower longitudinal sound tunnel on the inner wall of the bottom plate.

4. In the above scheme, the first groove and the upper sound beam are all provided with a strut at the crossing position, one end of the strut is propped against the bottom of the first groove, and the other end of the strut is propped against the upper sound beam.

5. In the above scheme, the upper tuning beam may be provided with an upper bridge opening, the upper bridge opening is a hole gap on one side of the upper tuning beam and enables the upper tuning beam to form an upper bridge type tuning beam structure, and the upper bridge opening is erected on the first groove. The lower sound beam is provided with a lower bridge opening, the lower bridge opening is a hole gap on one side of the lower sound beam, the lower sound beam forms a lower bridge type sound beam structure, and the lower bridge opening is erected on the third groove.

6. In the above scheme, an upper reinforcing plate can be arranged on the fixing frame between the two upper sound beams, and a lower reinforcing plate can also be arranged on the fixing frame between the two lower sound beams.

7. In the above scheme, the length of the first groove is smaller than the length of the panel at the corresponding position of the first groove, and smooth transition surfaces are arranged between two ends of the first groove and the inner wall of the panel; the length of the second groove is smaller than that of the panel at the corresponding position of the second groove, and smooth transition surfaces are arranged between two ends of the second groove and the inner wall of the panel. The length of the third groove is smaller than that of the corresponding position of the bottom plate in the third groove, and smooth transition surfaces are arranged between two ends of the third groove and the inner wall of the bottom plate; the length of the fourth groove is smaller than that of the corresponding position of the bottom plate in the fourth groove, and smooth transition surfaces are arranged between two ends of the fourth groove and the inner wall of the bottom plate.

8. In the scheme, the thickness of the panel and the bottom plate is a thickness gradually changing structure with the thickness of the central area being thick and the thickness of the periphery being thin.

9. In the above scheme, the first groove, the second groove, the third groove and the fourth groove are all arc-shaped grooves.

The design principle and the conception of the utility model are as follows: in order to solve the problem that the existing violin resonance box can not take into account that the high, middle and low sound zones simultaneously have good resonance tone, the utility model discloses to the existing violin resonance box, especially the design of the bass beam and the sound column in the resonance box has carried out thorough improvement. The concrete aspects are as follows: firstly, the original sound column design is cancelled; secondly, the original mode that a bass beam is fixedly arranged on the inner wall of the panel is changed into the mode that two upper sound beams are fixedly arranged on the inner wall of the panel in parallel; thirdly, an upper cross-shaped groove (namely a first groove and a second groove) is formed on the inner wall of the panel, and the upper cross-shaped groove forms an upper transverse sound tunnel and an upper longitudinal sound tunnel on the inner wall of the panel. The utility model discloses bright not coming out to current violin treble zone, and the not enough problem of bass zone soundness, carried out deep discussion and research to inside bass beam and sound column design and the vocal mechanism of the especially resonant tank of violin resonant tank, found out the not good leading cause of tone quality in current violin treble zone and bass zone because bass beam and sound column design unreasonable the result in the resonant tank. In view of the above, the inventor has broken the constraint of traditional bass roof beam and sound column design in the violin resonant tank in the past, and the bold has proposed the utility model discloses an improve design, this kind of improve design changes the free vibration mode in the past of resonant tank into present standard vibration mode, has solved the violin high sound zone from the angle of vibration, sympathetic response, sound production and has not come out, and the low sound zone is muddy mellow and full not enough problem, practice proves that this improves design has outstanding substantive characteristics and the technological progress that is showing to obvious technological effect has been obtained.

Due to the application of the above technical scheme, the utility model discloses compare with current violin resonant tank and have following advantage and effect (promptly with best mode the utility model discloses the content of embodiment explains):

1. the utility model discloses cancelled the sound column, all be provided with two sound beam structures at panel and bottom plate central authorities (set up two and go up the sound roof beam promptly on panel inner wall side by side, set up two and go down the sound roof beam on the bottom plate inner wall side by side), because the relative high pitch amplitude of bass is big, the frequency is low, the bass sympathetic response is concentrated in the central zone of resonant tank, the high pitch sympathetic response is concentrated in the edge region all around of resonant tank, strengthen panel and bottom plate central zone region intensity, played important effect to improving bass district tone color and tone quality. Because the thickness of the panel and the bottom plate of the violin is a thickness-changing structure with thick central area and thin periphery, the strength of the central area of the panel and the bottom plate is enhanced, the thickness difference between the central area of the resonance box and the peripheral area is relatively changed, and the violin plays a good role in improving the tone color and tone quality of a high-pitch area.

2. The utility model discloses seted up cross slot (first slot and second slot promptly) on the panel inner wall, should go up cross slot and actually form cross sound tunnel on the inner wall of panel. Meanwhile, a lower cross-shaped groove (namely a third groove and a fourth groove) is formed in 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. Because the relative high pitch amplitude of bass is big, the frequency is low, the bass sympathetic response is concentrated on the central zone of resonant tank, the high pitch sympathetic response is concentrated on the peripheral edge region all around of resonant tank, the string vibration is collected by the central zone of cross sound tunnel, and pass through last cross sound tunnel and lower cross sound tunnel (the tunnel of sound promptly) to transmit around the resonant tank rapidly, this tone and tone quality to improving the high tone area have played the key effect, good effect has also been played to tone color and tone quality to improving the low tone area simultaneously.

3. The utility model discloses the combined design of two sound roof beams and cross sound tunnel cuts apart into four sympathetic response regions with the space that the resonant box panel corresponds under the state of overlooking, simultaneously, also cuts apart into four sympathetic response regions with the space that the resonant box bottom plate corresponds, totally eight sympathetic response regions. When the violin is played, the string vibration is firstly transmitted to the center area of the sound tunnel intersection, then transmitted to the eight resonance areas through the sound tunnel, and resonance and vibration are generated, so that the string sound is amplified to be the resonance sound of the resonance box. The improved front-end piano can only produce four sound wave quantities when playing, namely, a resonance area is formed in the space corresponding to the panel, a resonance area is formed in the space corresponding to the bottom plate, two resonance areas are counted, one sound wave quantity is produced in each resonance area, a string wave quantity is added, and four sound wave quantities are counted by one percussion wave quantity. And after improving the utility model discloses can produce ten sound wave volume when the violin is played, wherein, eight sympathetic response regions produce eight sound wave volumes, and a string wave volume in addition, in addition a percussion wave volume counts ten sound wave volumes altogether. The sound wave quantity, i.e., the number of sound waves, for a specific resonance box for plucked instrument to be refined depends mainly on the number of resonance regions in the resonance box, in addition to one sound wave quantity and one percussion wave quantity, and in general, the instrument produces one sound wave quantity per resonance region during playing, and how many resonance regions produce how many sound wave quantities. In addition, the sound volume directly affects the timbre, penetration and volume of the instrument. Therefore, the utility model relates to a can obviously improve the tone quality in high-pitched sound district and bass district, increase the penetrating power in high-pitched sound district and bass district.

4. The utility model discloses design into bridge type sound roof beam structure with the sound roof beam, especially have the hole to lack in one side design of sound roof beam, make the sound roof beam like bridge arch structure. When the sound beam is erected on the sound tunnel, the sound beam is more favorable for transmitting vibration through the sound tunnel, and resonance of the resonance box is also more favorable.

5. The utility model discloses set up the pillar between first slot and last sound roof beam, can strengthen the support intensity between panel and the last sound roof beam on the one hand, on the other hand does not hinder the sound wave yet from central zone through first slot to transmission all around.

6. First slot, second slot, third slot and fourth slot all adopt the arc wall, can be so that panel and bottom plate minimize thickness sudden change in thickness, influence the sympathetic response and the vibration of resonant tank.

7. The utility model discloses fixed the setting up reinforcing plate between two last sound roof beams, the reinforcing plate is established down to the mount between two lower sound roof beams, its effect can increase panel and bottom plate middle part region firstly, especially go up the intensity between the sound roof beam and between the lower sound roof beam, secondly can increase two last sound roof beams and two load when the lower sound roof beam produces the sympathetic response, improve the tone quality in bass district, solve the problem that bass district muddy and mellow and full is not enough better, on the other hand has strengthened the central zone of resonant tank, relatively speaking also pull open with the regional intensity gap of resonant tank all around edge, also be favorable to improving high pitch district tone quality and tone quality.

The above advantages and effects are all explained in an optimum manner. It should be particularly emphasized that the provision of the beam structure and the grooves on the inner wall of the panel is more important than the equivalent provision on the inner wall of the base plate, and the effect and effect are relatively better. The reason is that the bridge and strings are arranged on the panel, and the bottom plate is not directly connected with the bridge and strings. It is therefore the solution to set up the two sound beam structures on the panel inner wall and set up the slot the utility model discloses technical problem's key, and it is right to set up the two sound beam structures on the bottom plate inner wall and set up the slot the utility model discloses it is better to add the flower, and this is that technical staff in the field understands easily.

Drawings

FIG. 1 is a cross-sectional view of a conventional violin resonance box;

FIG. 2 is a perspective view of a prior art bass beam;

FIG. 3 is a sectional view of a resonating box of a violin in accordance with an embodiment of the present invention;

fig. 4 is a perspective view of two upper bridge-type sound beams in a violin resonance box according to an embodiment of the present invention;

fig. 5 is a perspective view of two lower bridge type sound beams in a violin resonance box according to an embodiment of the present invention;

FIG. 6 is a front view of the inner wall of the panel and the upper bridge type sound beam in the violin resonance box of the embodiment of the present invention;

FIG. 7 is a cross-sectional view A-A of FIG. 6;

FIG. 8 is a view of section B-B of FIG. 6;

FIG. 9 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;

FIG. 10 is a sectional view of the case shell of the violin resonance box of the embodiment of the present invention;

FIG. 11 is a front view of the inner wall of the faceplate in the resonating box of the violin in accordance with the embodiment of the present invention;

FIG. 12 is a front view of the inner wall of the bottom plate in the resonating box of the violin according to the embodiment of the present invention;

fig. 13 is a cross-sectional view of a resonance box in which an upper reinforcing plate is added between upper sound beams and a lower reinforcing plate is added between lower sound beams according to the present invention;

FIG. 14 is a front view of the inner wall of the resonator panel with an upper reinforcing plate added between the upper sound beams of the present invention;

figure 15 is the front view of the inner wall of the bottom plate of the resonator of the utility model which adds the lower reinforcing plate between the lower sound beams.

In the above drawings: 1. a panel; 2. a base plate; 3. a side plate; 4. a bass beam; 5. a sound post; 6. a sound-feeding beam; 7. a bottom sound beam; 8. a first trench; 9. a second trench; 10. a third trench; 11. a fourth trench; 12. putting the bridge opening; 13. a lower bridge opening; 16. a pillar; 17. an upper reinforcing plate; 18. a lower reinforcing plate.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): double-sound-beam violin without sound column

The violin is composed of a resonance box, a violin head, a fingerboard, strings, a bridge, a chin rest, a string assembly, a peg and the like. Because the utility model discloses an innovation all concentrates on the resonant tank, consequently this embodiment will focus on describing the structure and the structure of violin resonant tank, and structures such as headstock, fingerboard, string, bridge, chin rest, string always, peg can be considered to adopt prior art to realize, do not describe in detail in this embodiment again.

The present embodiment further describes the structure and construction of a violin resonance box as an example: as shown in fig. 3 to 12, the cabinet of the violin resonance box is formed by splicing a face plate 1, a bottom plate 2 and side plates 3 (see fig. 3 and 10).

Two upper sound beams 6 and two lower sound beams 7 (see fig. 3) are arranged in the resonance box, and the upper sound beams 6 and the lower sound beams 7 are both long-strip-shaped sound beam components (see fig. 4 and 5). The upper sound beam 6 is provided with an upper bridge opening 12, the upper bridge opening 12 is a hole on one side of the upper sound beam 6, the upper sound beam 6 forms an upper bridge type sound beam structure (see fig. 4), and the upper bridge opening 12 is erected on the first groove 8. The lower sound beam 7 is provided with a lower bridge opening 13, the lower bridge opening 13 is a hole at one side of the lower sound beam 7 and enables the lower sound beam 7 to form a lower bridge type sound beam structure (see fig. 5), and the lower bridge opening 13 is erected on the third groove 10. One side of each of the two upper sound beams 6 is tightly fixed on the inner wall of the panel 1, the other side of each of the two upper sound beams 6 is tightly suspended in the resonance box relative to the bottom plate 2, the length direction of each 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 are separated by a certain distance when being seen in the width direction of the resonance box (see fig. 3 and 6). One side of each of the two lower sound beams 7 is tightly fixed on the inner wall of the bottom plate 2, one side of each of the two lower sound beams 7 is tightly suspended in the resonance box relative to the panel 1, the length direction of each 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 are separated by a certain distance when viewed in the width direction of the resonance box (see fig. 3 and 9).

The inner wall of the panel 1 is provided with a first groove 8 and a second groove 9 (see fig. 7, 8 and 11), the first groove 8 and the second groove 9 are crossed on the inner wall of the panel 1 and are mutually communicated (see fig. 11), wherein the second groove 9 is positioned 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 beams 6 (see fig. 6). The first grooves 8 cross over the two upper sound beams 6 in the width direction of the resonance box and form upper lateral sound tunnels on the inner wall of the panel 1 (see fig. 6 and 7), and the second grooves 9 form upper longitudinal sound tunnels on the inner wall of the panel 1 (see fig. 6 and 8).

A strut 16 is arranged at the position where the first groove 8 and the upper sound beam 6 intersect, one end of the strut 16 is against the bottom of the first groove 8, and the other end is against the upper sound beam 6 (see fig. 7).

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, and smooth transition surfaces are arranged 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 arranged between the two ends of the second groove 9 and the inner wall of the panel 1 (see fig. 11).

The inner wall of the bottom plate 2 is provided with a third groove 10 and a fourth groove 11 (see fig. 3 and 12), the third groove 10 and the fourth groove 11 are crossed on the inner wall of the bottom plate 2 and are communicated with each other (see fig. 12), wherein the fourth groove 11 is positioned 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 beams 7 (see fig. 9). 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 (see fig. 3) 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.

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, and smooth transition surfaces are arranged between both 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 smaller than the length of the bottom plate 2 at the corresponding position of the fourth groove 11, and smooth transition surfaces are arranged between the two ends of the fourth groove 11 and the inner wall of the bottom plate 2 (see fig. 12).

The thickness of the panel 1 and the bottom plate 2 are both of a thickness gradient structure with a thick central area and a thin periphery (see fig. 3 and 7). The first groove 8, the second groove 9, the third groove 10 and the fourth groove 11 are all arc-shaped grooves (see fig. 3, 7 and 8). Of the two upper sound beams 6, one upper sound beam 6 is located at a position corresponding to a bass foot of the violin bridge, and the other upper sound beam 6 is located at a position corresponding to a treble foot of the violin bridge (not shown). The two lower sound beams 7 are arranged in correspondence with the two upper sound beams 6 in the up-down direction as viewed from the cross section of the resonance box (see fig. 3). The two upper sound beams 6 are identical in shape and size (see fig. 4). The two bottom sound beams 7 are identical in shape and size (see fig. 5).

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiments, the present invention is not limited to the embodiments described above, but may be a viola, a cello, a viola (bass), a viola for children, or the like. As would be readily understood and accepted by those skilled in the art.

2. In the above embodiments, the inner walls of the panel 1 and the bottom plate 2 are both provided with the dual-sound beam structure and are both provided with the cross-shaped grooves. However, the utility model discloses be not limited to this, can cancel or change into other structural style with measures such as the two sound roof beams that adopt on the 2 inner walls of bottom plate and cross slot, it is feasible only to remain the technical measure who sets up on the panel 1 inner wall also, only slightly less in the aspect of the effect. The panel 1 is more important than the sole plate 2 for a violin resonance box. The reason is that the bridge and strings are provided on the face plate 1, and the base plate 2 is not directly connected to the bridge and strings, as will be understood by those skilled in the art.

3. In the above embodiments, the dual sound beam structure is disposed on the inner walls of the panel 1 and the bottom plate 2. That is, two upper sound beams 6 are provided on the panel 1, and two lower sound beams 7 are provided on the bottom plate 2. However, the present invention is not limited to this, and the two beams 6 can be changed from the form to four beams 6 for parallel use. For the present invention, the four upper sound beams 6 and the two upper sound beams 6 are different in number and form, but are identical in nature. Assuming that two outer sound beams of the four upper sound beams 6 are close to two inner sound beams, the two outer sound beams can be equivalent to a double sound beam. It is therefore believed that such a change does not bring about an unexpected effect and should be understood to be substantially equivalent. Similarly, the structure of the dual tone beam on the base plate 2 should also include such variations. The utility model discloses well two sound roof beams include the meaning of even number sound roof beam symmetrical arrangement, therefore six sound roof beam symmetrical arrangement are also the utility model discloses equate the variation. As will be readily understood by those skilled in the art.

4. In the above embodiment, the two upper sound beams 6 are juxtaposed in parallel as viewed in the width direction of the resonance box (see fig. 6). The two bottom beams 7 are parallel and parallel (see fig. 9). However, the present invention is not limited thereto, and the two upper sound beams 6 need not be parallel, and the two lower sound beams 7 need not be parallel, but the parallel arrangement is preferably, as will be understood and accepted by those skilled in the art.

5. In the above embodiment, the pillars 16 are disposed at the positions where the first grooves 8 and the upper sound beams 6 intersect, and one end of each pillar 16 abuts against the bottom of the first groove 8, and the other end abuts against the upper sound beam 6. However, the present invention is not limited to this, and the support column 16 may not be provided. It is also possible to provide the stay 16 between the first groove 8 and the upper sound beam 6 and between the third groove 10 and the lower sound beam 7 at the same time. As would be readily understood and accepted by those skilled in the art.

6. In the above embodiment, the upper sound beam 6 is provided with the upper bridge opening 12, and the lower sound beam 7 is provided with the lower bridge opening 13. However, the present invention is not limited to this, and the upper bridge opening 12, the lower bridge opening 13, or even only one bridge opening may not be provided. As would be readily understood and accepted by those skilled in the art.

7. In the above embodiment, 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 fig. 3). However, the present invention is not limited to this, and the upper reinforcing plate 17 may be fixedly installed between the two upper sound beams 6 (see fig. 13 and 14). Similarly, in the above embodiment, two lower sound beams 7 are fixed on the inner wall of the bottom plate 2 in parallel, and the two lower sound beams 7 are suspended in the resonance box (see fig. 3). However, the present invention is not limited to this, and the lower reinforcing plate 18 may be fixed between the two lower sound beams 7 (see fig. 13 and 15). The upper and lower reinforcing plates 17 and 18 can increase the strength of the middle regions of the panel and the bottom plate, particularly between the upper and lower sound beams, and can increase the load when the two upper and lower sound beams resonate.

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 groove may be designed into other shapes, such as a V-shape, a U-shape, a W-shape, and other concave structures. As would be readily understood and accepted by those skilled in the art.

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 to this, and can deviate from these positions, and can be specified specifically when tone color and tone quality are to be tuned according to the resonance box. As would be readily understood and accepted by those skilled in the art.

10. In the above embodiment, the two lower sound beams 7 and the two upper sound beams 6 are arranged in correspondence with each other in the up-down direction as viewed from the cross section of the resonance box (see fig. 3). However, the utility model discloses be not limited to this, can not align and arrange, confirm when specifically can debug tone color and tone quality according to the resonant tank. As would be readily understood and accepted by those skilled in the art.

11. In the above embodiment, the two upper sound beams 6 are the same in shape and size (see fig. 4). The two bottom sound beams 7 are identical in shape and size (see fig. 5). However, the present invention is not limited to this, and the shape and the size of the two upper sound beams 6 may not be the same, and the shape and the size of the two lower sound beams 7 may not be the same. The sound quality can be determined according to the tone color and tone quality of the resonance box. As would be readily understood and accepted by those skilled in the art.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides a two sound beam violins of no sound post, includes the resonant tank, and the case shell of this resonant tank is formed its characterized in that by panel (1), bottom plate (2) and curb plate (3) amalgamation:

two upper sound beams (6) are arranged in the resonator, the upper sound beams (6) are long-strip-shaped sound beam components, one sides of the two upper sound beams (6) are tightly attached and fixed on the inner wall of the panel (1), the other sides of the two upper sound beams (6) are suspended in the resonator relative to the bottom plate (2), the length directions of the two upper sound beams (6) are consistent with the length direction of the resonator, and the two upper sound beams (6) are parallel and separated by a certain distance when viewed in the width direction of the resonator;

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 on the inner wall of the panel (1) in a crossed mode and are communicated with each other, 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 beams (6); the first groove (8) stretches across the two upper sound beams (6) in the width direction of the resonator, an upper transverse sound tunnel is formed 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 of claim 1, wherein: two lower sound beams (7) are arranged in the resonator, the lower sound beams (7) are long-strip-shaped sound beam components, one sides of the two lower sound beams (7) are tightly attached and fixed on the inner wall of the bottom plate (2), the other sides of the two lower sound beams (7) are tightly attached and suspended in the resonator relative to the panel (1), the length directions of the two lower sound beams (7) are consistent with the length direction of the resonator, and the two lower sound beams (7) are parallel and separated by a certain distance when being seen in the width direction of the resonator;

the inner wall of the bottom plate (2) is provided with a third groove (10) and a fourth groove (11), the third groove (10) and the fourth groove (11) are arranged on the inner wall of the bottom plate (2) in a crossed mode and are communicated with each other, 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 beams (7); the third groove (10) stretches across two lower sound beams (7) in the width direction of the resonator, a lower transverse sound tunnel is formed on the inner wall of the bottom plate (2), and a lower longitudinal sound tunnel is formed on the inner wall of the bottom plate (2) by the fourth groove (11).

3. The violin of claim 1, wherein: and the positions where the first grooves (8) and the upper sound beams (6) are crossed are provided with support columns (16), one ends of the support columns (16) are propped against the bottoms of the first grooves (8), and the other ends of the support columns (16) are propped against the upper sound beams (6).

4. The violin of claim 2, wherein: an upper bridge opening (12) is formed in the upper sound beam (6), the upper bridge opening (12) is a hole gap 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 opening (12) is erected on the first groove (8);

and a lower bridge opening (13) is formed in the lower sound beam (7), the lower bridge opening (13) is in a hole gap at one side of the lower sound beam (7) and enables the lower sound beam (7) to form a lower bridge type sound beam structure, and the lower bridge opening (13) is erected on the third groove (10).

5. The violin of claim 2, wherein: an upper reinforcing plate (17) is arranged on the fixing frame between the two upper sound beams (6), and a lower reinforcing plate (18) is arranged on the fixing frame between the two lower sound beams (7).

6. The violin of claim 1, wherein: the length of the first groove (8) is smaller than that of the panel (1) at the corresponding position of the first groove (8), and smooth transition surfaces are arranged between 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 that of the panel (1) at the corresponding position of the second groove (9), and smooth transition surfaces are arranged between the two ends of the second groove (9) and the inner wall of the panel (1).

7. The violin of claim 2, wherein: the length of the third groove (10) is smaller than that of the bottom plate (2) at the position corresponding to the third groove (10), and smooth transition surfaces are arranged between the two 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 that of the bottom plate (2) at the corresponding position of the fourth groove (11), and smooth transition surfaces are arranged between the two ends of the fourth groove (11) and the inner wall of the bottom plate (2).

8. The violin of claim 2, wherein: 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 of claim 1, wherein: of the two upper sound beams (6), one upper sound beam (6) is positioned at the position corresponding to the bass foot of the violin bridge, and the other upper sound beam (6) is positioned at the position corresponding to the treble foot of the violin bridge.

10. The violin of claim 2, wherein: and when the cross section of the resonance box is observed, the two lower sound beams (7) and the two upper sound beams (6) are correspondingly arranged in the vertical direction.

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