CN212434223U - Double-sound-beam five-string instrument - Google Patents

Abstract

The utility model provides a two sound roof beam five string musical instruments, includes the resonant box, and the box of this resonant box is formed its characterized in that by panel, bottom plate and curb plate amalgamation: two upper sound beams are fixedly arranged on the inner wall of the panel in parallel; two first infrasound beams are fixedly arranged on the inner wall of the front half part of the bottom plate in parallel; two second lower sound beams are fixedly arranged on the inner wall of the rear half part of the bottom plate in parallel; an upper Feng-shaped groove is formed in the inner wall of the panel to form an upper Feng-shaped sound tunnel; a lower cross-shaped groove is formed in the inner wall of the front half part of the bottom plate to form a cross-shaped sound tunnel of the front half part; a lower cross-shaped groove is formed in the inner wall of the rear half part of the bottom plate to form a cross-shaped sound tunnel of the rear half part; the transverse sound beams are transversely arranged in the resonance cavity and are arranged on the left half part and the right half part of the groove body of the shape like the Chinese character feng. The scheme solves the problems that a high pitch area cannot be bright when a traditional five-string instrument is played, a low pitch area is not perfectly round and smooth, and instrument sound penetrating power is not strong.

Description

Double-sound-beam five-string instrument

Technical Field

The utility model relates to a plucked musical instrument, in particular to two tone roof beam five string musical instruments.

Background

The five-string instrument is a plucked instrument, has a long history and is rare, and belongs to a kind of ancient musical instrument. The five-string instrument has the national characteristics, soft pronunciation and low volume. Can be used for solo or accompany for folk songs and folk dance.

The five-string instrument is divided into an upper part and a lower part and comprises a soundboard, a string nail, a string column, strings, a resonance box and the like. The upper sound board is mostly made of soft pine and fir materials, the length of the board is 40 cm, the width of the board is 12 cm, the thickness of the board is 2 cm, five iron nails serving as string-tying string nails are nailed at one end of the board at a position 2 cm away from the two ends of the sound board, and the nail distance is 2 cm; the other end is provided with five small iron or wood sticks as string columns for tying strings, and the distance between the columns is 2 cm. Five strings are stretched between the string nail and the string column, and a string bridge is not arranged below the strings. Ancient strings are mostly formed by twisting hemp filaments, and then are gradually changed into wire strings or steel wire strings. The resonance box at the lower part is in a rectangular box shape, is formed by nailing various hard wood boards, has the length of 32 cm, the width of 16 cm and the height of 12 cm, and can be replaced by a tin can. The sound board and the resonance box of the five-string instrument are separated and shared, and the instrument is similar to structures of organs, serdes and buildings before 2400 years of the emergence of the great-wait tomb in the world of Hubei of China.

The register of five strings is four octaves, and the problem that exists is: the tone colors of the high tone area and the low tone area are not good, the specific expression is that the high tone area can not be brightened, the low tone area is not perfectly round, the penetrating power of the sound of the five-string instrument is not strong, and the sound needs to be further improved. The main reason for this is that the resonance box of a five-string instrument cannot meet the requirement of good resonance vibration from a high-pitch area to a low-pitch area, namely cannot simultaneously adapt to 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 resonance cavity of the existing five-string instrument is not favorable for exerting good sound wave resonance and vibration from a high-pitch area to a low-pitch area due to unreasonable design.

In view of the above, it is a subject of the present invention to improve the resonator of the existing five-stringed musical instrument, especially to improve the internal structure and structure of the resonator.

Disclosure of Invention

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

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a two sound roof beam five string musical instruments, includes the resonant tank, and the box 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 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.

A first groove is formed in the inner wall of the panel corresponding to the resonator, and the first groove is formed in the width direction of the resonator; a second groove is formed in the inner wall of the panel corresponding to 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 a five-string instrument, and innovation points are concentrated on a resonance box of the five-string instrument, so that other structures except the resonance box are not described. Can think the utility model discloses except that the resonance box other structures in the five string musical instrument adopt original five string musical instruments technique to realize.

2. In the above scheme, the "resonance box" refers to a body formed by splicing a panel, a bottom plate and side plates. The length direction of the resonance box of the five-stringed instrument is a direction approximately coincident with the strings, and the width direction of the resonance box is a direction perpendicular to the length direction. The term "inner wall" refers to the inner wall of the resonator, for example, the inner wall of the faceplate refers to the wall surface closer to the inner side of the resonator faceplate, and the inner wall of the base refers to the wall surface closer to the inner side of the resonator base.

3. In the above-mentioned scheme, can be in be equipped with two first infrasound roof beams and two second infrasound roof beams in the resonance box, first infrasound roof beam and second infrasound roof beam are rectangular form sound roof beam component, wherein: one side of each of the two first lower sound beams is tightly fixed on the inner wall of the bottom plate and is positioned at the front half part of the bottom plate, the other side of each of the two first lower sound beams is suspended in the resonator relative to the panel, the length direction of each of the two first lower sound beams is consistent with the length direction of the resonator, and the two first lower sound beams are parallel and separated by a certain distance when viewed in the width direction of the resonator; one side of the two second lower sound beams is tightly attached and fixed on the inner wall of the bottom plate and is positioned at the rear half part of the bottom plate, the other side of the two second lower sound beams is suspended in the resonator relative to the panel, the length directions of the two second lower sound beams are consistent with the length direction of the resonator, and the two second lower sound beams are parallel and separated by a certain distance when being seen in the width direction of the resonator.

The sound box comprises a bottom plate and is characterized in that a third groove and a fourth groove are arranged on the inner wall of the front half part of the bottom plate corresponding to the resonance box, wherein the third groove is formed along the width direction of the resonance box, the fourth groove is formed along the length direction of the resonance box, the third groove and the fourth groove are arranged at the position of the front half part of the inner wall of the bottom plate in a crossed manner and are communicated with each other, the fourth groove is positioned between the two first infrasound beams, the length direction of the fourth groove is consistent with the length direction of the first infrasound beams, the third groove stretches across the two first infrasound beams in the width direction of the resonance box, a lower transverse sound tunnel of the front half part is formed on the inner wall of the bottom plate, and a lower longitudinal sound tunnel of the front half part is formed on the inner wall of the bottom plate by the fourth.

Be equipped with fifth slot and sixth slot on the latter half inner wall of the bottom plate that the resonator corresponds, wherein, the fifth slot is seted up along the width direction of resonator, the sixth slot is seted up along the length direction of resonator, fifth slot and sixth slot are cross arrangement and link up each other on the latter half position of inner wall of bottom plate, wherein, the sixth slot is located the position between two second transoms, the length direction of sixth slot is unanimous with the length direction of second transom, the fifth slot spans two second transoms on the width direction of resonator, and form the lower horizontal sound tunnel of latter half on the inner wall of bottom plate, the sixth slot forms the lower vertical sound tunnel of latter half on the inner wall of bottom plate.

4. In the above scheme, a transom beam may be provided in the resonance box, the transom beam being in a plate shape, the transom beam being arranged at a first groove position of the resonance box; the transom beam is bilaterally symmetrical by taking the central plane of the second groove as a reference, the top of the transom beam is fixedly connected with the panel, the bottom of the transom beam is fixedly connected with the bottom plate, and the side part of the transom beam is fixedly connected with the side plate of the corresponding side.

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. Or a first lower bridge opening is arranged on the first lower sound beam, the first lower bridge opening is a gap at one side of the first lower sound beam and enables the first lower sound beam to form a lower bridge type sound beam structure, and the first lower bridge opening is erected on the third groove. And a second lower bridge opening can be arranged on the second lower sound beam, the second lower bridge opening is a hole gap on one side of the second lower sound beam and enables the second lower sound beam to form a lower bridge type sound beam structure, and the second lower bridge opening is erected on the fifth groove (14).

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

7. In the above scheme, the transom beam is provided with an avoiding opening corresponding to the transom beam, a pillar is arranged in the avoiding opening, and the pillar is fixedly connected with the transom beam.

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

The design principle and the conception of the utility model are as follows: in the case of a five-stringed instrument, there are many factors that affect the timbre and penetration thereof, such as the material, thickness, internal structure, and the like of the resonance box. The utility model discloses a solve present five string musical instruments resonant tank and can't compromise the problem that high, well, bass district possess good resonance tone and penetrating power simultaneously, mainly follow the resonant tank, especially the angle of resonant tank inner structure is set out and is carried out thorough improvement to it. The concrete aspects are as follows: firstly, two upper sound beams are fixedly arranged on the inner wall of a panel in a resonance box in parallel; secondly, offer the slot (being first slot and second slot) on the panel inner wall in the resonance box, this slot forms horizontal sound tunnel and last vertical sound tunnel on the inner wall of panel. The utility model discloses bright not coming out to current five string musical instruments high pitch district, and the low pitch district is muddy mellow and mellow not enough and the not strong problem of musical instrument sound penetrating power, to the resonant tank of five string musical instruments, especially resonant tank structure and sound production mechanism have carried out deep discussion and research, the tone quality and the volume that have found current five string musical instruments high pitch district and low pitch district are not good and the main reason that the penetrating power is not enough are because the resonant tank, especially the resonant tank 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. In view of the above, the inventor has broken the constraint of the traditional resonance box design of five string musical instruments in the past, and the bold has proposed the utility model discloses an improve design, solved five string musical instruments high pitch zone from the angle of vibration, sympathetic response, sound production and can not come out, and the low pitch zone is muddy mellow and mellow not enough and musical instrument sound penetrating power is not strong problem, practice proves that this improves design has outstanding substantive characteristics and apparent technological progress to obvious technological effect has been obtained.

Due to the application of the above technical solution, compared with the prior art, the present invention has the following advantages and effects (best mode is the content of the embodiments of the present invention is illustrated):

1. the utility model discloses 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 first sound roof beams side by side on the first half inner wall of bottom plate, set up two second sound roof beams side by side on the latter half inner wall of bottom plate, 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, panel and bottom plate central authorities regional intensity has been strengthened, have 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 and the bottom plate is enhanced, the thickness difference between the central area of the resonance box and the peripheral edge area is relatively changed, and the sound quality and the penetrating power of a high-sound area are improved.

2. The utility model discloses seted up "rich" font slot (being first slot and second slot) on the panel inner wall, this "rich" font slot has actually formed "rich" font sound tunnel on the inner wall of panel. Meanwhile, the inner wall of the front half part of the bottom plate is provided with cross-shaped grooves (namely a third groove and a fourth groove), the inner wall of the rear half part of the bottom plate is provided with cross-shaped grooves (namely a fifth groove and a sixth groove), and the cross-shaped grooves form cross-shaped sound tunnels on the inner walls of the front half part and the rear half part of the bottom plate. Because the bass is big, the frequency is low relatively the high pitch amplitude, the bass sympathetic response is concentrated in the central zone of resonant tank, the high pitch sympathetic response is concentrated in the peripheral edge region of resonant tank, the string vibration is collected by the criss-cross central zone of sound tunnel to pass through the tunnel of upper and lower sound tunnel (being the sound) and transmit around to the resonant chamber rapidly, this tone quality and the penetrating power to improving the high tone zone have played the key effect, played the good effect to tone quality and the penetrating power of improving the low tone zone simultaneously.

3. 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.

4. The utility model discloses adopted the combination design of three transversal sound roof beams of transversal arrangement and two last sound roof beams on the resonator panel inner wall, these transversal sound roof beams and two last sound roof beam combinations become eight sympathetic response regions with the space division that panel inner wall corresponds overlooking the state, simultaneously, these transversal sound roof beams and two first infrasound roof beams and two second infrasound roof beam combinations become eight sympathetic response regions with the space division that the bottom plate inner wall corresponds, total sixteen sympathetic response regions. When the five-stringed instrument is played, the string vibration is firstly transmitted to the center area of the sound tunnel intersection, then is transmitted to the sixteen 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 five-string instrument can only generate four sound wave quantities when being played, namely, the front half part and the rear half part of the resonance box are divided into two resonance areas, and each resonance area generates one sound wave quantity, one string wave quantity and one percussion wave quantity to totally calculate four sound wave quantities. And after improving the utility model discloses eighteen sound wave volume can be produced when five string musical instruments play, wherein, sixteen sympathetic response regions produce sixteen sound wave volume, in addition a string wave volume, in addition a percussion wave volume, total eighteen sound wave volume. 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.

5. The utility model discloses the crescent moon hole between transom beam and panel and the bottom plate is the passageway between each sympathetic response region in the resonant tank, and this kind of passageway design does benefit to mutual transmission sound wave, sympathetic response and vibration.

6. The utility model discloses fixed reinforcing plate of setting up between two last sound roof beams, fixed first reinforcing plate of setting up between two first sound roof beams, fixed reinforcing plate of setting up under the second under two second sound roof beams, its effect can increase panel and bottom plate middle part region firstly, especially go up between the sound roof beam and down the intensity between the sound roof beam, secondly can increase the load when sound roof beam and lower sound roof beam produce the sympathetic response, the tone quality and the penetrating power of bass district have further been improved, on the other hand the central zone of resonant tank has been strengthened, relatively speaking also pull open with the regional intensity difference of resonant tank all around edge, also be favorable to improving the tone quality and the penetrating power of bass district.

7. First slot, second slot, third slot, fourth slot, fifth slot and sixth 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.

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 strings are arranged on the panel, and the bottom plate is not directly connected with the 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 schematic view of a front view structure of a resonator of a five-stringed instrument according to an embodiment of the present invention;

FIG. 2 is a front view of the inner wall of the panel of the resonator of the five-stringed plucked instrument in the embodiment of the present invention;

FIG. 3 is a front view of the inner wall of the bottom plate of the resonance box of the five-stringed instrument in the embodiment of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 1;

FIG. 5 is a cross-sectional view of the resonator tank of FIG. 4;

FIG. 6 is a cross-sectional view B-B of FIG. 1;

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

fig. 8 is a front view of an upper sound beam of the five-stringed instrument according to the embodiment of the present invention;

fig. 9 is a left view of an upper sound beam of a five-stringed instrument according to an embodiment of the present invention;

fig. 10 is a front view of a first bass beam of the five-stringed instrument according to the embodiment of the present invention;

fig. 11 is a left view of a first tuning beam of a five-stringed instrument according to an embodiment of the present invention;

fig. 12 is a front view of a second bass beam of the five-stringed instrument according to the embodiment of the present invention;

fig. 13 is a left view of a second bottom beam of a five-stringed instrument according to an embodiment of the present invention;

fig. 14 is a front view of a large transom beam of a five-stringed instrument according to an embodiment of the present invention;

fig. 15 is a left side view of a large transom beam of a five-stringed instrument according to an embodiment of the present invention;

fig. 16 is a front view of a small transom beam of a five-stringed instrument according to an embodiment of the present invention;

fig. 17 is a left view of a small beam of a five-stringed instrument according to an embodiment of the present invention.

In the above drawings: 1. a panel; 2. a base plate; 3. a side plate; 4. a first bottom sound beam; 5. a small transom beam; 6. a sound-feeding beam; 7. a second 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 first lower bridge opening; 14. a fifth trench; 15. a sixth trench; 16. a large transom beam; 17. an upper reinforcing plate; 18. a first lower reinforcing plate; 19. a first segment; 20. a first bud aperture; 21. a second segment; 22. a second orychophragmus violaceus hole; 23. a second lower bridge opening; 24. a second lower reinforcing plate; 25. a large dodging port; 26. a small dodging port; 27. and a support pillar.

Detailed Description

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

example (b): double-sound-beam five-string instrument

Because the innovation of the utility model is concentrated on the resonance box, the structure and the structure of the five-stringed instrument resonance box will be described in the important way in the embodiment, and other structures can be realized by adopting the prior art, and detailed description is not provided in the embodiment.

The structure and the structure of the resonance box of the five-stringed instrument are as follows: as shown in fig. 1 to 17, the cabinet of the resonance box is formed by splicing a face plate 1, a bottom plate 2 and side plates 3 (see fig. 5).

Two upper sound beams 6 (see fig. 1, 2 and 4) are arranged in the resonator, the upper sound beams 6 are long-strip-shaped sound beam components (see fig. 8 and 9), 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 resonator relative to the bottom plate 2 (see fig. 4), the length directions of the two upper sound beams 6 are consistent with the length direction of the resonator (see fig. 2), 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 resonator. The upper sound beam 6 is provided with an upper bridge opening 12 (see fig. 8), 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.

Three first grooves 8 (see fig. 2) are arranged on the inner wall of the panel 1 corresponding to the resonance box, the three first grooves 8 are all formed along the width direction of the resonance box, and the three first grooves 8 are arranged in the length direction of the resonance box at intervals. A second groove 9 (see fig. 2) is provided on the inner wall of the panel 1 corresponding to 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 central position in the width direction of the resonance box. The three first grooves 8 and the one second groove 9 are in a shape like a Chinese character feng on the inner wall of the panel 1 and are communicated with each other, wherein the second groove 9 is positioned between the two upper sound beams 6 (see fig. 2), and the length direction of the second groove 9 is consistent with the length direction of the upper sound beams 6. Three first grooves 8 cross two upper sound beams 6 in the width direction of the resonance box (see fig. 4), and form three upper transverse sound tunnels on the inner wall of the panel 1, and second grooves 9 form an upper longitudinal sound tunnel on the inner wall of the panel 1 (see fig. 2).

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

Two first muffling beams 4 and two second muffling beams 7 (see fig. 3) are provided in the resonance box, and each of the first muffling beams 4 and the second muffling beams 7 is an elongated sound beam member (see fig. 10 to 13), in which: one side of the two first beams 4 is closely fixed on the inner wall of the base plate 2 (see fig. 3 and 4) and is positioned at the front half part of the base plate 2, the other side of the two first beams 4 is suspended in the resonator relative to the panel 1, the length direction of the two first beams 4 is consistent with the length direction of the resonator, and the two first beams 4 are parallel and parallel at a certain distance when viewed in the width direction of the resonator. One side of each of the two second infrasound beams 7 is closely fixed to the inner wall of the base plate 2 (see fig. 3 and 6) and is located at the rear half part of the base plate 2, the other side of each of the two second infrasound beams 7 is suspended in the resonator relative to the panel 1, the length direction of each of the two second infrasound beams 7 is identical to the length direction of the resonator, and the two second infrasound beams 7 are parallel and parallel to each other and are separated by a certain distance when viewed in the width direction of the resonator. The first lower sound beam 4 is provided with a first lower bridge opening 13 (see fig. 10), the first lower bridge opening 13 is a hole at one side of the first lower sound beam 4 and enables the first lower sound beam 4 to form a lower bridge type sound beam structure, and the first lower bridge opening 13 is erected on the third groove 10. A second lower bridge opening 23 (see fig. 12) is arranged on the second lower sound beam 7, the second lower bridge opening 23 is a hole at one side of the second lower sound beam 7 and enables the second lower sound beam 7 to form a lower bridge type sound beam structure, and the second lower bridge opening 23 is erected on the fifth groove 14.

A third groove 10 and a fourth groove 11 (see fig. 3) are arranged on the inner wall of the front half part of the bottom plate 2 corresponding to the resonator, wherein the third groove 10 is arranged along the width direction of the resonator, the fourth groove 11 is arranged along the length direction of the resonator, the third groove 10 and the fourth groove 11 are cross-shaped grooves at the position of the front half part of the inner wall of the bottom plate 2 and are communicated with each other, the fourth groove 11 is arranged between the two first lower sound beams 4 (see fig. 3), the length direction of the fourth groove 11 is consistent with the length direction of the first lower sound beams 4, the third groove 10 spans the two first lower sound beams 4 in the width direction of the resonator, and forms a lower transverse sound tunnel of the front half part on the inner wall of the bottom plate 2, and the fourth groove 11 forms a lower longitudinal sound of the front half part 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 (see fig. 3), 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 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. 3).

A fifth groove 14 and a sixth groove 15 (see fig. 3) are arranged on the inner wall of the rear half portion of the bottom plate 2 corresponding to the resonator, wherein the fifth groove 14 is formed along the width direction of the resonator, the sixth groove 15 is formed along the length direction of the resonator, the fifth groove 14 and the sixth groove 15 are cross-shaped grooves at the rear half portion of the inner wall of the bottom plate 2 and are communicated with each other, the sixth groove 15 is positioned between the two second lower sound beams 7 (see fig. 3), the length direction of the sixth groove 15 is consistent with the length direction of the second lower sound beams 7, the fifth groove 14 crosses the two second lower sound beams 7 in the width direction of the resonator, a lower transverse sound tunnel at the rear half portion is formed on the inner wall of the bottom plate 2, and the sixth groove 15 forms a lower longitudinal sound at the rear half portion on the inner wall of the bottom plate 2.

The length of the fifth groove 14 is smaller than the length of the bottom plate 2 in the resonance box at the position corresponding to the fifth groove 14 (see fig. 3), and smooth transition surfaces are arranged between the two ends of the fifth groove 14 and the inner wall of the bottom plate 2. The length of the sixth groove 15 is smaller than the length of the bottom plate 2 in the resonance box at the corresponding position of the sixth groove 15 (see fig. 3), and smooth transition surfaces are arranged between the two ends of the sixth groove 15 and the inner wall of the bottom plate 2.

Two large transom beams 16 (see fig. 4) and one small transom beam 5 (see fig. 6) are provided in the resonance box, and the large transom beams 16 and the small transom beams 5 are each plate-like (see fig. 14 to 17), wherein one of the two large transom beams 16 is disposed at the position of the first groove 8 in the front portion of the resonance box, the other is disposed at the position of the first groove 8 in the middle portion of the resonance box, and the one small transom beam 5 is disposed at the position of the first groove 8 in the rear portion of the resonance box (see fig. 2). The large transom beam 16 and the small transom beam 5 are bilaterally symmetrical with the central plane of the second groove 9 as a reference, wherein the tops of the large transom beam 16 and the small transom beam 5 are fixedly connected with the panel 1 (see fig. 4 and 6), the bottoms of the large transom beam 16 and the small transom beam 5 are fixedly connected with the bottom plate 2, and the side parts of the large transom beam 16 and the small transom beam 5 are fixedly connected with the side plates 3 on the corresponding sides.

The big transom beam 16 is provided with a big avoiding opening 25 corresponding to the upper beam 6, a strut 27 is arranged in the big avoiding opening 25, and the strut 27 is fixedly connected with the big transom beam 16 (see fig. 14). The small transom 5 is provided with a small evasion port 26 corresponding to the upper sound beam 6 (see fig. 16). The side of the large transom beam 16 connected with the panel 1 and the side plate 3 is provided with a first round notch 19 (see fig. 14), and a first crescent hole 20 (see fig. 4) is formed between the first round notch 19 and the inner walls of the panel 1 and the side plate 3 in an assembled state. The side of the small transom beam 5 connected with the bottom plate 2 and the side plate 3 is provided with a second round notch 21 (see fig. 16), and a second bud hole 22 (see fig. 6) is formed between the second round notch 21 and the inner walls of the bottom plate 2 and the side plate 3 in an assembling state.

An upper reinforcing plate 17 (see fig. 2 and 4) is fixed between the two upper sound beams 6, a first lower reinforcing plate 18 (see fig. 3 and 4) is fixed between the two first lower sound beams 4, and a second lower reinforcing plate 24 (see fig. 3 and 6) is fixed between the two second lower sound beams 7. The first groove 8, the second groove 9, the third groove 10, the fourth groove 11, the fifth groove 14 and the sixth groove 15 are all arc-shaped grooves.

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. 2). The two first muffling beams 4 are juxtaposed in parallel, and the two second muffling beams 7 are juxtaposed in parallel (see fig. 3). However, the present invention is not limited to this, and the two upper sound beams 6 need not be parallel, and the two first lower sound beams 4 and the two second lower sound beams 7 need not be parallel, but the parallel arrangement is optimal, which is easily 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 grooves. However, the present invention is not limited to this, and the measures such as the beam and the groove that are adopted on the inner wall of the bottom plate 2 can be cancelled or changed into other structural forms, and only the technical measures that are set on the inner wall of the panel 1 are kept are also feasible, and only the effect is slightly poor. The panel 1 is more important than the bottom panel 2 for a five-stringed instrument resonator. The reason is that the panel 1 is provided with strings, while the base plate 2 is not directly related to the strings, as will be readily 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, three first grooves 8 (see fig. 2) are formed on the inner wall of the panel 1, and one third groove 10 and one fifth groove 14 (see fig. 3) are formed on the inner wall of the bottom plate 2. However, the present invention is not limited thereto, and the number of the first groove 8, the third groove 10, and the fifth groove 14 may be one, two, three, four, or five, etc. Such variations may be determined on an actual basis. The number of the first trenches 8, the third trenches 10 and the fifth trenches 14 is at least one in nature.

5. In the above embodiment, the large transom beam 16 and the small transom beam 5 provided in the resonance box are each bilaterally symmetrical with respect to the center plane of the second groove 9 (see fig. 4 and 6). However, the present invention is not limited to this, and each of the large transom beam 16 and the small transom beam 5 may be divided into two beams, and the beams are symmetrically arranged with respect to the center plane of the second groove 9. 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, the first lower sound beam 4 is provided with the first lower bridge opening 13, and the second lower sound beam 7 is provided with the second lower bridge opening 23. However, the present invention is not limited to this, and the upper bridge opening 12 may not be provided, the first lower bridge opening 13 may not be provided, and even the bridge opening is provided only on one or both of the upper sound beam 6, the first lower sound beam 4 and the second lower sound beam 7. As would be readily understood and accepted by those skilled in the art.

7. In the above embodiment, the upper reinforcing plate 17 (see fig. 4) is fixed between the two upper sound beams 6, the first lower reinforcing plate 18 (see fig. 4) is fixed between the two first lower sound beams 4, and the second lower reinforcing plate 24 (see fig. 6) is fixed between the two second 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 first lower sound beams 4 may be suspended in the resonance box without providing the first lower reinforcing plate 18, or the second lower reinforcing plate 24 may not be provided.

8. In the above embodiments, the first groove 8, the second groove 9, the third groove 10, the fourth groove 11, the fifth groove 14 and the sixth groove 15 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, the two first lower sound beams 4 and the two upper sound beams 6 are arranged in correspondence with each other in the vertical direction (see fig. 4), and the two second lower sound beams 7 and the two upper sound beams 6 are arranged in correspondence with each other in the vertical direction (see fig. 6), as viewed from the cross section of the resonance box. 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 those skilled in the art.

10. In the above embodiment, the two upper sound beams 6 have the same shape and size (see fig. 8), the two first lower sound beams 4 have the same shape and size (see fig. 10), and the two second lower sound beams 7 have the same shape and size (see fig. 12). However, the utility model discloses be not limited to this, two shape and the size of a dimension of going up sound roof beam 6 can be inequality, and the shape and the size of a dimension of two first infrasound roof beams 4 also can be inequality, and the shape and the size of a dimension of two second infrasound roof beams 7 also can be inequality. 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 roof beam five string musical instruments, includes the resonant box, and the box of this resonant box 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), 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;

a first groove (8) is formed in the inner wall of the panel (1) corresponding to 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) corresponding to 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 five-stringed instrument of claim 1, wherein: be equipped with two first beams of downing (4) and two second beams of downing (7) in the resonance box, first beams of downing (4) and second beams of downing (7) are rectangular form sound beam component, wherein: one side of each of the two first lower sound beams (4) is tightly fixed on the inner wall of the bottom plate (2) and is positioned at the front half part of the bottom plate (2), the other side of each of the two first lower sound beams (4) is suspended in the resonator relative to the panel (1), the length direction of each of the two first lower sound beams (4) is consistent with the length direction of the resonator, and the two first lower sound beams (4) are parallel and separated by a certain distance when viewed in the width direction of the resonator; one side of each of the two second lower sound beams (7) is tightly fixed on the inner wall of the bottom plate (2) and is positioned at the rear half part of the bottom plate (2), the other side of each of the two second lower sound beams (7) is suspended in the resonator relative to the panel (1), the length direction of each of the two second lower sound beams (7) is consistent with the length direction of the resonator, and the two second lower sound beams (7) are parallel and separated by a certain distance when viewed in the width direction of the resonator;

a third groove (10) and a fourth groove (11) are arranged on the inner wall of the front half part of the bottom plate (2) corresponding to the resonance box, wherein, the third groove (10) is arranged along the width direction of the resonance box, the fourth groove (11) is arranged along the length direction of the resonance box, the third groove (10) and the fourth groove (11) are arranged in a crossed way at the front half part of the inner wall of the bottom plate (2) and are mutually communicated, wherein the fourth groove (11) is positioned between the two first lower sound beams (4), the length direction of the fourth groove (11) is consistent with the length direction of the first lower sound beams (4), the third groove (10) spans the two first lower sound beams (4) in the width direction of the resonance box, a lower transverse sound tunnel of the front half part is formed on the inner wall of the bottom plate (2), and a lower longitudinal sound tunnel of the front half part is formed on the inner wall of the bottom plate (2) by the fourth groove (11);

a fifth groove (14) and a sixth groove (15) are arranged on the inner wall of the back half part of the bottom plate (2) corresponding to the resonance box, wherein, the fifth groove (14) is arranged along the width direction of the resonance box, the sixth groove (15) is arranged along the length direction of the resonance box, the fifth groove (14) and the sixth groove (15) are arranged crosswise on the rear half part of the inner wall of the bottom plate (2) and are mutually communicated, wherein the sixth groove (15) is positioned between the two second lower sound beams (7), the length direction of the sixth groove (15) is consistent with the length direction of the second lower sound beams (7), the fifth groove (14) spans the two second lower sound beams (7) in the width direction of the resonance box, and a lower transverse sound tunnel of the rear half part is formed on the inner wall of the bottom plate (2), and a lower longitudinal sound tunnel of the rear half part is formed on the inner wall of the bottom plate (2) by the sixth groove (15).

3. The five-stringed instrument of claim 1, wherein: a transom beam is arranged in the resonance box, is in a plate shape and is arranged at the position of a first groove (8) of the resonance box; the transom beam 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), the bottom of the transom beam is fixedly connected with the bottom plate (2), and the side part of the transom beam is fixedly connected with the side plate (3) on the corresponding side.

4. The five-stringed instrument 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);

a first lower bridge hole (13) is formed in the first lower sound beam (4), a hole is formed in one side of the first lower sound beam (4) of the first lower bridge hole (13), the first lower sound beam (4) forms a lower bridge type sound beam structure, and the first lower bridge hole (13) is erected on the third groove (10);

and a second lower bridge opening (23) is formed in the second lower sound beam (7), the second lower bridge opening (23) is in a hole gap at one side of the second lower sound beam (7) and enables the second lower sound beam (7) to form a lower bridge type sound beam structure, and the second lower bridge opening (23) is erected on the fifth groove (14).

5. The five-stringed instrument of claim 2, wherein: an upper reinforcing plate (17) is arranged on a fixed frame between the two upper sound beams (6), a first lower reinforcing plate (18) is arranged on a fixed frame between the two first lower sound beams (4), and a second lower reinforcing plate (24) is arranged on a fixed frame between the two second lower sound beams (7).

6. The five-stringed instrument 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 five-stringed instrument 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 five-stringed instrument of claim 2, wherein: the length of the fifth groove (14) is smaller than that of the bottom plate (2) in the resonance box at the position corresponding to the fifth groove (14), and smooth transition surfaces are arranged between two ends of the fifth groove (14) and the inner wall of the bottom plate (2); the length of the sixth groove (15) is smaller than that of the corresponding position of the bottom plate (2) in the resonance box at the sixth groove (15), and smooth transition surfaces are arranged between the two ends of the sixth groove (15) and the inner wall of the bottom plate (2).

9. The five-stringed instrument of claim 3, wherein: an avoiding opening is formed in the transom beam corresponding to the upper sound beam (6), a supporting column (27) is arranged in the avoiding opening, and the supporting column (27) is fixedly connected with the transom beam.

10. The five-stringed instrument of claim 2, wherein: the first groove (8), the second groove (9), the third groove (10), the fourth groove (11), the fifth groove (14) and the sixth groove (15) are all arc-shaped grooves.

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