CN218602091U - Double-sound-beam lyre - Google Patents

Abstract

The utility model provides a two sound roof beam liuqin, includes the resonant tank, and the box of this resonant tank is formed its characterized in that by panel and bottom plate amalgamation: two upper sound beams are fixedly arranged on the inner wall of the panel in parallel; a transom beam is fixedly arranged between the panel and the bottom plate, and the transom beam and the two upper sound beams are combined to divide the space corresponding to the inner wall of the panel into six resonance areas. The scheme breaks through the constraint of the traditional design of the internal structure of the willow organ resonance box, a new improved design scheme is provided by the container, the problem that the traditional willow organ cannot give consideration to both high, middle and low sound zones and has good resonance tone and penetrating power is solved, the penetrating power (attenuation is small and transmission is far) of the willow organ sound is greatly enhanced, the high sound zone is bright and rigid, the middle sound zone is soft and moist, and the low sound zone is relatively pure and thick in tone quality.

Description

Double-sound-beam lyre

Technical Field

The utility model relates to a chinese tradition plucks musical instrument, in particular to a two tone roof beam willow musical instrument.

Background

The Liuqin, also known as Liuye qin, buddha's warrior attendant legs and native lute, is a traditional plucked instrument in China. The original prevalence is in Su, lu, wan provinces. The current popularity is around the country, mainly in Shandong near Yi and Subei. Belongs to one of the pear-shaped sound box stringed instruments which are popular in folks since the Tang dynasty, and the appearance, the structure and the playing method of the instrument are similar to those of a Ruan.

Nowadays, harp plays a variety of roles in the field of chinese musical performance. In national bands, the Liuqin is a high-pitched musical instrument of a plucked instrument set, has unique sound effect and often plays an important main melody in a high-pitched area. Because the timbre of the instrument is not easy to be covered and fused by other instruments, the instrument can play Chinese passages with high skill. In addition, the Liuqin also has the sound effect of a western musical instrument mandolin, and is peculiar in flavor when cooperating with a western band.

The Liuqin is composed of a headstock, a lyre shaft, a panel, a sound window, a top opening, a lyre product, a lyre code, a fine adjustment, a bottom plate (a back plate) and the like. The fixed string of the Liuqin is generally a fixed string method with fixed pitch, namely a string, also called a sub-string, and the fixed pitch is two groups of small characters d; two strings, also called middle string, the timbre is g of a small character group; three strings, also called inner string, the pitch is d of a small character group; four strings, also called string winding, are the timbre g of the small character group. The Liuqin is small and exquisite in style, bright in tone color and wide in range, and is originally made of the Maoyang wood at the lower end of a willow and shaped like a willow leaf, so that people are called the Liuqin or the Liuye Qin.

The defects of the prior willow organ are as follows: compared with the middle tone region, the tone colors of the high tone region and the low tone region need to be improved, the high tone region cannot be lightened, the low tone region is not perfectly round, and the penetrating power of the piano sound needs to be further improved. The main reason for this is that the current resonance box of the harp cannot meet the requirement of good resonance vibration from the high-pitch area to the low-pitch area, i.e. cannot simultaneously adapt to the resonance and vibration of wide frequency changes of the high-pitch area, the middle-pitch area and the low-pitch area. Further research shows that the factors influencing resonance and vibration in the resonance box are more, and besides the materials and the thickness of the panel and the bottom plate, the internal structure and the structure of the resonance box have larger influence. The existing resonance box of the lyre is unreasonable in design and is not beneficial to the resonance box to play good sound wave resonance and vibration from a high-pitch area to a low-pitch area.

In view of the above, the present invention is to improve the resonator of the existing harp, and particularly to improve the internal structure and structure of the resonator.

Disclosure of Invention

The utility model provides a two tone roof beam willow musical instrument, its purpose is to solve current willow musical instrument resonant tank and can't compromise the problem that high, well, bass district possess good resonance tone and penetrating power simultaneously.

In order to achieve the purpose, the utility model adopts the technical proposal that: the utility model provides a two sound roof beam liuqin, includes the resonant tank, and the box of this resonant tank is formed by panel and bottom 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 on the inner wall of the panel, one 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 when viewed in the width direction of the resonator.

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

1. in the scheme, the theme is 'lyre', and innovation points are focused on 'a resonance box' of the lyre, so that other structures and structures except the resonance box are not described. It can be considered that the other structures except the resonance box in the willow musical instrument of the utility model are realized by adopting the prior art.

2. In the above solution, the "resonance box" refers to a sound box formed by splicing a front panel and a bottom panel (back panel). The length direction of the willow resonator is the direction approximately consistent with the strings, and the width direction of the resonator is the direction vertical to the length direction. The "inner wall" refers to an inner wall surface of the resonance box, for example, the inner wall surface of the faceplate refers to a wall surface close to the inner side of the faceplate of the resonance box, and the inner wall surface of the soleplate refers to a wall surface close to the inner side of the soleplate of the resonance box.

3. In the above scheme, two lower sound beams may be provided in the resonator, the lower sound beams are strip-shaped sound beam members, one side of each of the two lower sound beams is fixed to the inner wall of the bottom plate in a closely attached manner, the other side of each of the two lower sound beams is suspended in the resonator relative to the panel, the length direction of the two lower sound beams is consistent with that of the resonator, and the two lower sound beams are parallel to each other and separated by a certain distance in the width direction of the resonator.

4. In the above scheme, a transom beam is arranged in the resonator, the transom beam is in a plate shape, wherein the transom beam is arranged in the width direction of the resonator, and is in bilateral symmetry with the central plane in the length direction of the resonator as a reference, the top of the transom beam is fixedly connected with the panel, and the bottom of the transom beam is fixedly connected with the bottom plate.

5. In the above scheme, the upper sound beam is provided with an upper bridge opening, and the upper bridge opening is a hole gap on one side of the upper sound beam and enables the upper sound beam to form an upper bridge type sound beam structure; and a lower bridge opening is arranged on the lower sound beam, and one side of the lower bridge opening on the lower sound beam is a hole gap so that the lower sound beam forms a lower bridge type sound beam structure.

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 be arranged on the fixing frame between the two lower sound beams.

7. In the scheme, the center of the transom beam is provided with a through hole; the side edge of the transom beam connected with the panel and the bottom plate is provided with a circular notch, and a crescent hole is formed between the circular notch and the inner wall of the panel and the inner wall of the bottom plate in an assembly state.

The utility model relates to a principle and design are: in the case of a Liuqin, factors influencing the timbre and the penetrating power of the Liuqin are many, such as the material, thickness and internal structure of a resonance box. The utility model discloses a solve present willow organ resonant tank and can't compromise the problem that high, well, bass district possess good resonance tone and penetrating power simultaneously, mainly set out from the angle of resonance intracavity internal structure and carried out thorough improvement to it. The following measures are specifically adopted: two upper sound beams are fixedly arranged on the inner wall of the panel in the resonance cavity in parallel. The utility model discloses can not come out to present willow musical instrument high pitch area brightness, and the not enough problem of low pitch area muddy and round, to the resonant tank of willow musical instrument, especially resonance chamber structure and sound production mechanism have carried out deep discussion and research, have found out the tone quality and the not good leading cause of penetrating power in current willow musical instrument high pitch area and low pitch area because the resonant tank, especially resonance chamber design is unreasonable to be sent, the sound wave can not produce good sympathetic response and vibration in the resonant chamber when leading to playing. Therefore, the inventor has broken the constraint of the traditional resonance box (especially resonance chamber) design of the willow in the past, and has provided the utility model discloses an improved design scheme has solved the problem that the high-pitched region of willow can not be bright from the angle of transmission, vibration, sympathetic response, sound production of sound wave, and the bass region is muddy and mellow and not enough, and practice proves that this improved design scheme has outstanding substantive characteristics and apparent technological progress, makes the penetrating power (the decay is little, passes far away) of willow sound strengthen greatly, and the high-pitched region is bright and rich in rigidity, and the midtone region is soft and has moist sound, and bass region tone quality is more pure and thick.

Due to the application of the above technical solution, compared with the existing koto resonator, the utility model has the following advantages and effects (best mode is the content of the embodiment of the utility model is illustrated):

1. the utility model discloses all be provided with two sound beam structures at panel central authorities (set up two and go up the sound roof beam promptly on the panel inner wall side by side), because the relative high pitch amplitude of bass is big, the frequency is low, and the bass sympathetic response is concentrated in the central zone of resonant tank, and the high pitch sympathetic response is concentrated in the peripheral region all around of resonant tank, has strengthened panel central authorities regional intensity, has played important effect to improving bass district tone color and penetrating power. On the other hand, the strength of the central area of the panel is enhanced, the thickness difference between the central area of the resonance box and the peripheral area is relatively changed, and the good effect on improving the tone color and the penetrating power of a high-tone area is also achieved.

2. 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.

3. The utility model discloses a design of transom roof beam (first transom roof beam and second transom roof beam), these transom roof beams and two last sound roof beam combinations become six sympathetic response regions with the space division that panel inner wall corresponds under the resonance box overlook the state. When the bottom plate inner wall is provided with the lower sound beams, the transverse sound beams (the first transverse sound beam and the second transverse sound beam) and the two lower sound beams are combined to divide the space corresponding to the bottom plate inner wall into six resonance areas, and twelve resonance areas are calculated. When the willow is played, the vibration of strings is firstly transmitted to the central area of the resonance cavity, then is transmitted to the twelve resonance areas through sound tunnels, 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 Liuqin can only generate five sound wave quantities when played, namely two sound beams divide a resonance cavity into three resonance areas, each resonance area generates one sound wave quantity, one string wave quantity is added, and one percussion wave quantity is added, so that five sound wave quantities are counted. After improving the utility model discloses can produce eight sound wave volume when single face double sound beam liuqin is played, wherein, six sympathetic response regions produce six sound wave volumes, in addition a string wave volume, in addition a percussion wave volume counts eight sound wave volumes altogether. Fourteen sound wave quantities can be generated when the double-faced double-sound-beam Liuqin is played, wherein twelve sound wave quantities are generated in twelve resonance areas, one string wave quantity is added, and one percussion wave quantity is added, so that fourteen sound wave quantities are calculated. The sound wave quantity, i.e. the number of sound waves, for a plucked instrument of a specific resonance box mainly depends on the number of resonance areas in the resonance box, besides one string wave quantity and one percussion wave quantity, and usually, the instrument generates one sound wave quantity per resonance area during playing, and how many resonance areas generate 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 range and bass district, increase the penetrating power and the volume in high range and bass district.

4. The utility model discloses through-hole on the transom beam and the crescent moon hole between transom beam and panel and the bottom plate are the passageway between each sympathetic response region in the sympathetic response intracavity, and this kind of channel design does benefit to mutual transmission sound wave, sympathetic response and vibration.

5. The utility model discloses fixed the mounting and go up the reinforcing plate between two last sound roof beams, the reinforcing plate is established to the mount between two lower sound roof beams, its effect is first can increase panel and bottom plate middle part region, especially go up between the sound roof beam and the intensity between the lower sound roof beam, second can increase two and go up the sound roof beam and two loads when the lower sound roof beam produces the sympathetic response, the tone quality and the penetrating power in bass district have further been improved, on the other hand the central zone of resonant tank has been strengthened, comparatively speaking also pull open with the regional intensity difference in resonant tank all around edge, also be favorable to improving the tone quality and the penetrating power in high sound district.

The above advantages and effects are all explained in an optimum manner. It is particularly emphasized that the provision of the double tone beam structure on the inner wall of the faceplate is more important to the present invention than the use of the equivalent means on the inner wall of the base plate, and the effect and effect are relatively better. The reason is that the strings are arranged on the panel, and the bottom plate is not directly connected with the strings. Therefore it is the key to set up the two tone beam structure on the panel inner wall and be the solution the utility model discloses technical problem, and it is right to set up the two tone beam structure on the bottom plate inner wall the utility model discloses it adds the flower to be better, and this is that the technical staff in the field understands easily.

Drawings

FIG. 1 is a front view of a conventional Liuqin;

FIG. 2 is a left side view of a conventional Liuqin;

FIG. 3 isbase:Sub>A sectional view A-A of FIG. 1;

fig. 4 is a schematic view of the major structure of the liuqin according to embodiment 1 of the present invention;

fig. 5 is a left side view of the liuqin according to embodiment 1 of the present invention;

FIG. 6 is a sectional view taken along line B-B of FIG. 4;

FIG. 7 is a cross-sectional view of the resonator tank of FIG. 6;

FIG. 8 is a cross-sectional view C-C of FIG. 4;

fig. 9 is a schematic view of a major structure of a lyre in embodiment 2 of the present invention;

fig. 10 is a left side view of the liuqin according to embodiment 2 of the present invention;

FIG. 11 is a cross-sectional view D-D of FIG. 9;

FIG. 12 is a cross-sectional view of the resonator tank of FIG. 11;

FIG. 13 is a cross-sectional view E-E of FIG. 9;

fig. 14 is a front view of a sound beam in embodiments 1 and 2 of the present invention;

fig. 15 is a left side view of the upper sound beam in embodiments 1 and 2 of the present invention;

fig. 16 is a front view of a woofer in embodiment 2 of the present invention;

fig. 17 is a left side view of a woofer in embodiment 2 of the present invention;

fig. 18 is a front view of a first transom beam in embodiments 1 and 2 of the present invention;

fig. 19 is a left side view of a first transom beam in embodiments 1 and 2 of the present invention;

fig. 20 is a front view of a second transom beam according to embodiments 1 and 2 of the present invention;

fig. 21 is a left side view of a second transom beam in embodiment 1 and embodiment 2 of the present invention.

In the drawings above: 1. a panel; 2. a base plate; 3. a sound beam; 4. a splayed 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; 14. a sound outlet hole; 15. a first transom beam; 16. a second transom beam; 17. an upper reinforcing plate; 18. a lower reinforcing plate; 19. a first segment; 20. a first bud aperture; 21. a second segment; 22. a second Orifice hole; 23. a first through hole; 24. a second via.

Detailed Description

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

example 1: double-sound beam liuqin (Single-side double-sound beam structure)

Because the innovation of the utility model is concentrated on the resonator, the structure and the structure of the willow organ resonator will be described in this embodiment with emphasis, and other structures related to the willow organ can be considered to be realized by adopting the prior art, and detailed description is not provided in this embodiment.

The structure and the structure of the willow organ resonance box of the embodiment are as follows: as shown in fig. 4 to 8, 14, 15, 18 to 21, the cabinet of the resonance box is formed by splicing the face plate 1 and the base plate 2 (see fig. 5 to 8).

Two upper sound beams 6 (see fig. 4 and 6) are arranged in the resonance box, the upper sound beams 6 are long-strip-shaped sound beam components (see fig. 14 and 15), one sides of the two upper sound beams 6 are tightly fixed on the inner wall of the panel 1, the other sides of the two upper sound beams 6 are suspended in the resonance box relative to the bottom plate 2 (see fig. 6), the length directions of the two upper sound beams 6 are consistent with the length direction of the resonance box (see fig. 4), 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. 6). The upper sound beam 6 is provided with an upper bridge opening 12 (see fig. 14), the upper bridge opening 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 opening 12 is erected on the first groove 8.

Two first grooves 8 (see fig. 4) are arranged on the inner wall of the panel 1 of the resonance box, the two first grooves 8 are both formed along the width direction of the resonance box, and the two first grooves 8 are arranged in the length direction of the resonance box at intervals. A second groove 9 (see fig. 4) is provided on the inner wall of the faceplate 1 of the resonance box, the second groove 9 is formed along the length direction of the resonance box, and the second groove 9 is located at the center in the width direction of the resonance box. Two first grooves 8 and one second groove 9 intersect on the inner wall of the panel 1 and penetrate each other (see fig. 7), wherein the second groove 9 is located at a position between the two upper sound beams 6, and the length direction of the second groove 9 is identical to the length direction of the upper sound beams 6. The two first grooves 8 cross over the two upper sound beams 6 in the width direction of the resonance box and form two upper transverse sound tunnels (see fig. 4) on the inner wall of the panel 1, and the second grooves 9 form upper longitudinal sound tunnels (see fig. 4) on the inner wall of the panel 1.

The length of the first groove 8 is less than the length of the panel 1 in the resonance box at the corresponding position of the first groove 8 (see fig. 4), and smooth transition surfaces are arranged 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 in the resonance box at the corresponding position of the second groove 9 (see fig. 4), and smooth transition surfaces are arranged between the two ends of the second groove 9 and the inner wall of the panel 1.

A first transom beam 15 and a second transom beam 16 (see fig. 4) are arranged in the resonance box, the first transom beam 15 and the second transom beam 16 are both in a plate shape, wherein the two first transom beams 15 are arranged at the position of one first groove 8 and are in bilateral symmetry with the central plane of the second groove 9 as a reference (see fig. 4), the top of each first transom beam 15 is fixedly connected with the panel 1, and the bottom of each first transom beam 15 is fixedly connected with the bottom plate 2 (see fig. 6). Two second transom beams 16 are arranged at the position of the other first groove 8 and are in bilateral symmetry with the center plane of the second groove 9 as a reference (see fig. 4), the top of each second transom beam 16 is fixedly connected with the panel 1, and the bottom of each second transom beam 16 is fixedly connected with the bottom plate 2 (see fig. 8). The first transom beam 15 and the second transom beam 16 are both arranged in the horizontal direction in the resonance box, and a first through hole 23 is formed in the center of the first transom beam 15 (see fig. 18). A second through hole 24 (see fig. 20) is opened in the center of the second transom beam 16. The first transom beam 15 is provided with a first round notch 19 (see fig. 18) at the connecting side of the panel 1 and the bottom plate 2, and a first crescent hole 20 (see fig. 6) is formed between the first round notch 19 and the inner walls of the panel 1 and the bottom plate 2 in an assembling state. The second transom beam 16 is provided with a second round gap 21 (see fig. 20) at the connecting side with the panel 1 and the bottom plate 2, and a second bud hole 22 (see fig. 8) is formed between the second round gap 21 and the inner walls of the panel 1 and the bottom plate 2 in the assembled state.

An upper reinforcing plate 17 (see fig. 6) is arranged between the two upper sound beams 6, a sound post 5 (see fig. 4) is arranged at the position where the first groove 8 and the second groove 9 are crossed, the sound post 5 is of a supporting column structure, one end of the sound post 5 is supported on the panel 1, and the other end of the sound post 5 is supported on the bottom plate 2 (see fig. 6). The first grooves 8 and the second grooves 9 are both arc-shaped grooves (see fig. 7).

Example 2: double sound beam willow organ (double-face double sound beam structure)

Example 2 differs from example 1 in that: the base plate 2 of embodiment 1 is a thick plate and the inner wall of the base plate 2 is not provided with the beam and groove structure, while the base plate of embodiment 2 is a thin plate and the inner wall of the base plate 2 is provided with the beam and groove structure. The specific content is as follows:

as shown in fig. 9 to 13, 16, and 17, two bottom sound beams 7 (see fig. 10 and 11) are provided in the resonator, the bottom sound beams 7 are elongated sound beam members (see fig. 16 and 17), one sides of the two bottom sound beams 7 are closely fixed to the inner wall of the base plate 2, the other sides of the two bottom sound beams 7 are suspended in the resonator with respect to the panel 1 (see fig. 11), the longitudinal directions of the two bottom sound beams 7 are aligned with the longitudinal direction of the resonator (see fig. 10), and the two bottom sound beams 7 are parallel to each other and spaced apart from each other in the width direction of the resonator (see fig. 11). The lower sound beam 7 is provided with a lower bridge opening 13 (see fig. 16), the lower bridge opening 13 is a hole on 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.

Two third grooves 10 (see fig. 10) are arranged on the inner wall of the bottom plate 2 of the resonance box, the two third grooves 10 are both arranged along the width direction of the resonance box, and the two third grooves 10 are arranged at intervals in the length direction of the resonance box. A fourth groove 11 (see fig. 12) is provided on the inner wall of the bottom plate 2 of the resonance box, the fourth groove 11 is formed along the length direction of the resonance box, and the fourth groove 11 is located at the center in the width direction of the resonance box. Two third grooves 10 and one fourth groove 11 intersect on the inner wall of the bottom plate 2 and are mutually communicated, wherein the fourth groove 11 is positioned between the two bottom sound beams 7 (see fig. 11), and the length direction of the fourth groove 11 is consistent with the length direction of the bottom sound beams 7. The two third grooves 10 transversely span the two lower sound beams 7 in the width direction of the resonance box, form two lower transverse sound tunnels on the inner wall of the bottom plate 2, and the fourth grooves 11 form lower longitudinal sound tunnels 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 in the resonance box 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 less than the length of the bottom plate 2 in the resonance box at the position corresponding to 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.

A lower reinforcing plate 18 is arranged between the two lower sound beams 7 in a fixed frame mode (see figure 11). The third groove 10 and the fourth groove 11 are both arc-shaped grooves.

The rest of embodiment 2 is the same as embodiment 1, and the description thereof will not be repeated.

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

1. 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 sound beams 7 are parallel and parallel (see fig. 11). 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.

2. 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 tuning beams 6 may be changed from the form to the four tuning beams 6 to be used in parallel. 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. Likewise, the dual tone beam structure 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.

3. In the above embodiment, two first grooves 8 (see fig. 4) are disposed on the inner wall of the panel 1, and two third grooves 10 (see fig. 10) are disposed on the inner wall of the bottom plate 2. However, the present invention is not limited thereto, and the number of the first grooves 8 and the third grooves 10 may be one, three, four, or five. Such variations may be determined on an actual basis. The number of the first grooves 8 and the third grooves 10 is at least one in nature.

4. In the above embodiment, two first transom beams 15 and two second transom beams 16 (see fig. 4 and 9) are provided. The two first transom beams 15 and the two second transom beams 16 are both symmetrical left and right with respect to the center plane of the second groove 9 (see fig. 4 and 9) but the present invention is not limited thereto, and the two first transom beams 15 may be combined into one first transom beam 15 by being connected to each other, and the two second transom beams 16 may be combined into one second transom beam 16 by being connected to each other, which is easily understood and accepted by those skilled in the art.

5. 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 the bridge opening may be provided only on one of the upper sound beam 6 and the lower sound beam 7. As would be readily understood and accepted by those skilled in the art.

6. In the above embodiment, the upper reinforcing plate 17 (see fig. 6) is fixed between the two upper sound beams 6, and the lower reinforcing plate 18 (see fig. 11) is fixed between the two lower sound beams 7. However, the present invention is not limited to this, and the two upper sound beams 6 may be suspended in the resonator without providing the upper reinforcing plate 17. Similarly, the two lower sound beams 7 may be suspended in the resonance box without the lower reinforcing plate 18. The upper and lower reinforcing plates 17 and 18 can increase the strength of the middle regions of the front and rear panels, particularly between the upper and lower sound beams, and can increase the load when the two upper and lower sound beams resonate.

7. 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.

8. In the above embodiment 2, the two lower sound beams 7 and the two upper sound beams 6 are arranged in correspondence with each other in the vertical direction as viewed in the cross section of the resonance box (see fig. 11). However, the present invention is not limited to this, and the alignment arrangement may be performed in a non-aligned manner, but the alignment arrangement is most effective. As would be readily understood and accepted by one skilled in the art.

9. In the above embodiment, the two upper sound beams 6 are the same in shape and size (see fig. 14). The two transoms 7 are identical in shape and size (see fig. 16). 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 one 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 in the protection scope of the present invention.

Claims (6)

1. The utility model provides a two tone roof beam willow musical instrument, includes the resonant tank, and the box of this resonant tank is formed its characterized in that by panel (1) and bottom plate (2) 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 to the inner wall of the panel (1), one 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 being seen in the width direction of the resonator.

2. The willowherb 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 to the inner wall of the bottom plate (2), the other sides of the two lower sound beams (7) are 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.

3. The willowherb of claim 1, wherein: the acoustic horn structure is characterized in that a transom beam is arranged in the resonator, the transom beam is in a plate shape, the transom beam is arranged in the width direction of the resonator, and is bilaterally symmetrical by taking the central plane in the length direction of the resonator as a reference, the top of the transom beam is fixedly connected with the panel (1), and the bottom of the transom beam is fixedly connected with the bottom plate (2).

4. The harp of claim 2, wherein: an upper bridge opening (12) is formed in the upper sound beam (6), and the upper bridge opening (12) is a hole gap on one side of the upper sound beam (6) so that the upper sound beam (6) forms an upper bridge type sound beam structure; and a lower bridge opening (13) is formed in the lower sound beam (7), and 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.

5. The harp 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 willowherb of claim 3, wherein: a through hole is formed in the center of the transom beam; the side edge of the transom beam connected with the panel (1) and the bottom plate (2) is provided with a circular notch, and a crescent hole is formed between the circular notch and the inner walls of the panel (1) and the bottom plate (2) in an assembly state.

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