CN111951760A - Double-sound beam lute - Google Patents

Abstract

The utility model provides a two tone roof beam pipa, includes the resonant tank, and the box of this resonant tank is formed by panel and bottom plate amalgamation, its characterized in that: two upper sound beams are fixedly arranged on the inner wall of the panel in parallel; a transverse groove and a longitudinal groove are formed in the inner wall of the panel, and the transverse groove and the longitudinal groove are communicated with each other to form a transverse sound tunnel and a longitudinal sound tunnel; 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 traditional lute resonator, a new improved design scheme is provided for the large container, the problem that the traditional lute cannot give consideration to both high, middle and low tone areas and has good resonance tone and penetrating power is solved, the penetrating power (attenuation is reduced and transmission is far) of the lute sound is greatly enhanced, the high tone area is bright and rich in rigidity, the middle tone area is soft and moist, and the tone quality of the low tone area is more pure and thick.

Description

Double-sound beam lute

Technical Field

The invention relates to a Chinese traditional plucked musical instrument, in particular to a double-tone beam lute.

Background

Lute, a traditional plucked instrument in china, has a history of more than two thousand years. The musical instrument, which was originally called "lute", appears approximately in the qin dynasty of china. The lute is the first seat of plucked musical instrument, plucked string type stringed musical instrument. The sound box (sound box) is made of wood or bamboo, is in a half pear shape, is provided with four strings, and is made of silk yarns, steel wires, steel ropes and nylon. The neck and the panel are provided with 'looks' and 'pints' for determining the phoneme. When playing, the instrument is held vertically, the left hand presses strings, and the right hand plays with five fingers, and is an important national musical instrument capable of solo, accompaniment, repetition and ensemble.

The basic structure of the lute is composed of a head part and a body part, wherein the head part comprises a string groove, a string shaft, a mountain opening and the like, and the body part comprises a phase part, a grade part, a sound box (a resonance box), a covering hand and the like. The sound box is formed by splicing a panel and a bottom plate (Chinese lute back), a splayed sound beam (two sound beams form a splayed shape) is arranged on the inner wall of the panel in the sound box, three sound columns are arranged between the panel and the bottom plate, and a sound outlet hole is also arranged on the panel. The lute comprises six phases and twenty-four products to form a twelve-tone equal temperament with a wide range of sound. One string is steel wire, and the second, third and fourth strings are steel rope nylon winding strings. The lute is very special in sounding, and its overtone is in the first place in various instruments in ancient and modern countries, so that it not only has large volume, but also its tone quality is crisp and bright. Meanwhile, the fundamental tone emitted by the lute is accompanied with abundant overtones, the overtones can reduce the attenuation of the musical instrument sound in the transmission process, and the musical instrument sound has certain penetrating power, and when the lute is played in a quiet open place, the musical instrument sound when the lute plays a strong sound can be transmitted to the places other than the places of two miles and three miles.

Compared with western musical instruments, the lute has the following defects at present: the timbre of the high-pitched and the low-pitched areas needs to be improved, the high-pitched areas cannot be lightened, the low-pitched areas are 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 lute resonator can not satisfy the requirement of good resonance vibration from the high pitch region to the low pitch region, i.e. can not adapt to the resonance and vibration of wide frequency changes of the high pitch region, the middle pitch region and the low pitch region. 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 conventional resonance box of the lute is unreasonable in design and is not favorable for 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, it is an object of the present invention to improve the resonator of the existing lute, and particularly to improve the internal structure and structure of the resonator.

Disclosure of Invention

The invention provides a double-tone beam lute, and aims to solve the problem that the existing lute resonator can not give consideration to both high, middle and low tone areas and has good resonance tone and penetrating power.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a two sound roof beam pipa, 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, 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.

A first groove is formed in the inner wall of the panel of the resonator and is formed in the width direction of the resonator; a second groove is formed in the inner wall of the panel of the resonator and is formed in the length direction of the resonator; the first grooves and the second grooves are arranged on the inner wall of the panel in a crossed mode and are communicated with each other, the second grooves are located between the two upper sound beams, and the length direction of the second grooves 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 the Chinese lute, and innovation points are concentrated on a resonance box of the Chinese lute, so that other structures and structures except the resonance box are not described. Other structures except the resonance box in the lute can be realized by adopting the prior art.

2. In the above scheme, the "resonance box" refers to a sound box formed by splicing a panel and a bottom plate (lute back). The length direction of the lute resonator is about the same direction with the strings, and the width direction of the resonator is 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 may be arranged in the resonator, the lower sound beams are long-strip-shaped sound beam members, one sides of the two lower sound beams are closely fixed to the inner wall of the bottom plate, the other sides of the two lower sound beams are 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 and separated by a certain distance in the width direction of the resonator.

A third groove is formed in the inner wall of the bottom plate of the resonator and is formed in the width direction of the resonator; a fourth groove is formed in the inner wall of the bottom plate of the resonator and is formed in the length direction of the resonator; 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, a transom beam is arranged in the resonator, the transom beam is in a plate shape, wherein the transom beam is arranged at the position of the first groove and is in bilateral symmetry with the central plane of the second groove 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, an upper bridge opening can be arranged on the upper sound beam, the upper bridge opening is a 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 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 scheme, the transom beam is arranged in the transverse direction in the resonance box, and a through hole is formed in the center of the transom beam; the connection side of the transom beam, 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.

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

The design principle and concept of the invention are as follows: for the lute, factors influencing the tone and the penetrating power of the lute are many, such as the material, thickness and internal structure of a resonance box. The invention aims to solve the problem that the existing lute resonator can not give consideration to both high, middle and low tone areas and has good resonance tone and penetrating power, and is thoroughly improved mainly from the perspective of the internal structure of the resonance cavity. The concrete aspects are as follows: firstly, two upper sound beams are fixedly arranged on the inner wall of a panel in a resonance cavity in parallel; secondly, offer the slot (namely first slot and second slot) on the panel inner wall in the resonant cavity, this slot forms horizontal sound tunnel and last vertical sound tunnel on the inner wall of panel. Aiming at the problems that the prior lute high-sound area cannot be brightened and the low-sound area is not perfectly round, the invention deeply discusses and researches the resonator of the lute, particularly the structure of the resonance cavity and the sound production mechanism, and finds out that the main reason that the tone quality and the penetrating power of the prior lute high-sound area and the low-sound area are poor is that sound waves cannot generate good resonance and vibration in the resonator during playing due to the unreasonable design of the resonator, particularly the resonance cavity. Therefore, the inventor breaks through the restriction of the traditional Chinese lute resonator (particularly a resonance cavity) design, and the invention provides an improved design scheme of the invention, so that the problems that the lute high-pitched area is not bright and the low-pitched area is not full and round are solved from the angles of sound wave transmission, vibration, resonance and sounding.

Due to the application of the above technical solution, compared with the existing koto resonator, the present invention has the following advantages and effects (as described in the content of the best mode, i.e. the embodiment of the present invention):

1. the invention has the advantages that the center of the panel is provided with the double-tone beam structure (namely, the inner wall of the panel is provided with the two upper tone beams in parallel), because the bass has large amplitude and low frequency relative to the treble, the bass resonance is concentrated in the central area of the resonator, and the treble resonance is concentrated in the peripheral area of the resonator, thereby strengthening the strength of the central area of the panel and playing an important role in improving the tone and the penetrating power of the bass area. 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 inner wall of the panel is provided with grooves (namely a first groove and a second groove), and the grooves are mutually communicated on the inner wall of the panel to actually form a longitudinal sound tunnel and a transverse sound tunnel. The sound tunnels form a sound wave transmission tunnel in the resonance cavity, bass is large in amplitude and low in frequency relative to treble, bass resonance is concentrated in the central area of the resonance box, treble resonance is concentrated in the peripheral area of the resonance box, when string vibration is collected by the central area and is rapidly transmitted to the periphery of the resonance cavity through the sound tunnels (namely the sound tunnels), and therefore the sound tunnel plays a key role in improving the tone quality and the penetrating power of a high-tone area, and plays a good role in improving the tone quality and the penetrating power of a low-tone area.

3. The invention designs the sound beam into a bridge type sound beam structure, and particularly designs a hole on one side of the sound beam to make the sound beam like a 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.

4. The invention adopts the design of the transom beams (the first transom beam and the second transom beam), and the transom beams and the two upper sound beams are combined to divide the space corresponding to the inner wall of the panel into six resonance areas under the overlooking state of the resonance box. 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 lute is played, the vibration of the strings is firstly transmitted to the central area of the resonance cavity, then transmitted to the twelve 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 lute can only generate five sound wave quantities when playing, 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, one percussion wave quantity is added, and five sound wave quantities are counted. After improvement, eight sound wave quantities can be generated when the single-side double-sound-beam lute is played, wherein six sound wave quantities are generated in six resonance areas, one string wave quantity is added, and one percussion wave quantity is added, so that eight sound wave quantities are counted. Fourteen sound wave quantities can be generated when the double-sided double-sound-beam lute 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 counted. 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 design of the invention can obviously improve the timbre of the high-tone area and the low-tone area and increase the penetrating power and the volume of the high-tone area and the low-tone area.

5. The through holes on the transom beam and the crescent moon holes between the transom beam and the panel and the bottom plate are channels among all resonance areas in the resonance cavity, and the channels are designed to be beneficial to mutually transmitting sound waves, resonance and vibration.

6. The upper reinforcing plate is fixedly erected between the two upper sound beams, the lower reinforcing plate is fixedly arranged between the two lower sound beams, the middle areas of the panel and the bottom plate, particularly the strength between the upper sound beams and the strength between the lower sound beams can be increased, the load generated when the two upper sound beams and the two lower sound beams generate resonance can be increased, the tone and the penetrating power of a low-pitch area are further improved, the central area of the resonance box is reinforced, the strength difference between the central area and the peripheral area of the resonance box is relatively opened, and the tone and the penetrating power of a high-pitch area are also improved.

7. The first groove, the second groove, the third groove and the fourth groove are arc-shaped grooves, so that the thickness of the panel and the bottom plate is reduced as much as possible, and resonance and vibration of the resonance box are influenced.

The above advantages and effects are all explained in an optimum manner. It is particularly emphasized that the provision of the beam structure and the grooves on the inner wall of the panel is more important and relatively more effective than the equivalent provision on the inner wall of the base plate for the present invention. 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 easy to understand for those skilled in the art that the provision of the dual tone beam structure and the provision of the grooves on the inner wall of the faceplate are key to solving the technical problems of the present invention, and the provision of the dual tone beam structure and the provision of the grooves on the inner wall of the base plate is a simple addition to the present invention.

Drawings

FIG. 1 is a front view of a prior lute;

FIG. 2 is a left view of a prior lute;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

fig. 4 is a schematic structural diagram of a lute in the embodiment 1 of the present invention;

FIG. 5 is a left view of a lute in embodiment 1 of the present invention;

FIG. 6 is a cross-sectional view 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 main view structure of a lute in embodiment 2 of the present invention;

fig. 10 is a left view of a lute in embodiment 2 of the present invention;

FIG. 11 is a cross-sectional view taken along line 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 an upper sound beam in embodiments 1 and 2 of the present invention;

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

fig. 16 is a front view of a down sound beam in embodiment 2 of the present invention;

fig. 17 is a left side view of a down sound beam 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 in embodiments 1 and 2 of the present invention;

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

In the above drawings: 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 orychophragmus violaceus hole; 23. a first through hole; 24. a second via.

Detailed Description

The invention is further described with reference to the following figures and examples:

example 1: double-tone beam lute (Single-side double-tone beam structure)

Since the innovations of the invention are all concentrated on the resonator, the structure and structure of the lute resonator will be described in the embodiment with emphasis, and other structures related to the lute can be considered to be realized by adopting the prior art, and will not be described in detail in the embodiment.

The structure and structure of the lute resonator 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 a face plate 1 and a 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 arranged along the width direction of the resonance box, and the two first grooves 8 are arranged at intervals in the length direction of the resonance box. A second groove 9 (see fig. 4) is provided on the inner wall of the panel 1 of the resonance box, the second groove 9 is opened along the length direction of the resonance box, and the second groove 9 is located at the center in the width direction of the resonance box. Two first grooves 8 and one second groove 9 intersect and penetrate each other on the inner wall of the panel 1 (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 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 an upper longitudinal sound tunnel (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 bilaterally symmetrical with the center 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. A second round notch 21 (see fig. 20) is arranged on the connecting side of the second transom beam 16 with the panel 1 and the bottom plate 2, and a second bud hole 22 (see fig. 8) is formed between the second round notch 21 and the inner walls of the panel 1 and the bottom plate 2 in an assembling 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 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-tone beam lute (double-face double-tone 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 contents are 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 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.

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 opened in 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 variations of the present invention are described below:

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 juxtaposed (see fig. 11). The present invention is not limited thereto and the two upper sound beams 6 need not be parallel, nor does the two lower sound beams 7 need to be parallel, but the parallel arrangement is preferable, as will be readily 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 two upper sound beams 6 may be changed from the form to the use of four upper sound beams 6 in parallel. For the purposes of the present invention, the four upper sound beams 6 are the same in nature as the two upper sound beams 6, although the number and the form are different. 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. In the invention, the double sound beams include the meaning of symmetrical arrangement of even number of sound beams, so the symmetrical arrangement of six sound beams is also the equivalent variation of the invention. 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. The present invention is not limited thereto, and the number of the first trenches 8 and the third trenches 10 may be one, three, four, or five, etc. 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 bilaterally symmetrical 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, as will be readily 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 and lower bridge holes 12 and 13 may be omitted, or even the bridge hole may be provided only in one of the upper and lower sound beams 6 and 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 resonance box 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 grooves may be designed in 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 from the cross section of the resonance box (see fig. 11). The invention is not limited thereto and may be arranged out of alignment, but the alignment arrangement works best. As would be readily understood and accepted by those 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 bottom sound beams 7 are identical in shape and size (see fig. 16). However, the present invention is not limited to this, and the two upper sound beams 6 and the two lower sound beams 7 may be different in shape and size. 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 merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to 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 within the protection scope of the present invention.

Claims (10)

1. The utility model provides a two tone roof beam pipa, includes the resonant tank, and the box of this resonant tank is formed by panel (1) and bottom plate (2) amalgamation, its characterized in that:

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 being seen in the width direction of the resonator;

a first groove (8) is formed in the inner wall of the panel (1) of the resonator, and the first groove (8) is formed in the width direction of the resonator; a second groove (9) is formed in the inner wall of the panel (1) of the resonator, and the second groove (9) is formed in the length direction of the resonator; 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 that 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 lute of claim 1, wherein: two lower sound beams (7) are arranged in the resonator, the lower sound beams (7) are 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 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 are separated by a certain distance when being seen in the width direction of the resonator;

a third groove (10) is formed in the inner wall of the bottom plate (2) of the resonator, and the third groove (10) is formed in the width direction of the resonator; a fourth groove (11) is formed in the inner wall of the bottom plate (2) of the resonator, and the fourth groove (11) is formed in the length direction of the resonator; the third grooves (10) and the fourth grooves (11) are arranged on the inner wall of the bottom plate (2) in a crossed mode and are communicated with each other, the fourth grooves (11) are located between the two lower sound beams (7), and the length direction of the fourth grooves (11) is consistent with that 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 lute of claim 1, wherein: the 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 at the position of the first groove (8) and is bilaterally symmetrical by taking the central plane of the second groove (9) 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 lute 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 lute 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 lute of claim 1, wherein: the length of the first groove (8) is smaller than that of the panel (1) in the resonator 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) in the resonator 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 lute of claim 2, wherein: the length of the third groove (10) is smaller than that 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 smaller than that of the corresponding position of the bottom plate (2) in the resonance box at 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 lute of claim 3, wherein: the transom beam is arranged in the transverse direction in the resonance box, and a through hole is formed in the center of the transom beam; the connection side of the transom beam, 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.

9. The lute of claim 1, wherein: the sound column (5) is arranged at the crossed position of the first groove (8) and the second groove (9), the sound column (5) is of a supporting column structure, one end of the sound column (5) is supported on the panel (1), and the other end of the sound column is supported on the bottom plate (2).

10. The lute 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.

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