Yangqin with circular integral sound beam

Abstract

A dulcimer with an annular integral sound beam comprises a resonance box, which comprises a panel and a bottom plate; an upper bridge sound beam is provided on the lower surface of the panel, which is arranged in a ring shape in the center of the lower surface of the panel; four upper grooves are also provided on the lower surface of the panel, and each upper groove is arranged in a cross shape, dividing the panel surface located outside the upper bridge sound beam into four upper resonance areas; each upper groove crosses the upper bridge sound beam in the horizontal direction, and is perpendicular to the upper bridge sound beam in the length direction; the upper groove is concavely arranged on the lower surface of the panel to form a sound tunnel. The present invention changes the panel of the dulcimer from the previous free vibration mode to the current standard vibration mode, and solves the problem that the dulcimer's high pitch area is not bright, and the low pitch area is not thick and round enough from the perspective of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantive characteristics and significant technical progress.

Description

Technical Field

[0001] The invention relates to a stringed instrument, in particular to a dulcimer with an annular integral sound beam. Background Art

[0002] Yangqin, also known as Yangqin, Daqin, Tongsiqin, Fanmianqin, Batqin, and Butterflyqin, is a stringed instrument and an indispensable instrument in Chinese folk bands. The timbre of Yangqin has distinct characteristics, with a large volume and a combination of hardness and softness. When played slowly, the timbre is like the sound of a mountain spring, and when played quickly, the timbre is like the sound of gurgling water. The timbre is bright, as crisp as large and small pearls falling on a jade plate. It has extremely rich expressiveness and can be played solo, in ensemble, or as an accompaniment for Qinshu, rap, and opera. It often plays the role of "piano accompaniment" in folk instrumental ensembles and folk bands, and is an indispensable main instrument.

[0003] The structure of the dulcimer includes a resonance box, a shank, rollers, bridges, and strings. Figures 1 to 5 As shown, the resonance box 1 includes a panel 2 and a bottom plate 3 spaced below the panel 2. A plurality of bridges 4 are provided on the upper surface of the panel 2, a plurality of transverse beams 5 (supporting plates) are spaced between the lower surface of the panel 2 and the upper surface of the bottom plate 3, and a plurality of sound holes 6 are provided on the bottom plate 3. Among them, four to five circular holes 7 are provided on the support plate 5, which are called wind holes, so that the resonated sound waves can convect in the resonance box 1 and then be transmitted from the sound holes 6.

[0004] The range of the dulcimer is usually four octaves, of which the treble area accounts for about two octaves, the middle area accounts for about one and a half octaves, and the bass area accounts for about half an octave. At present, due to the limitations of the traditional structural design, the common problem of the dulcimer is that the timbre of the treble and bass areas is not good, and the timbre effect that the dulcimer should have is not brought into play. The specific performance is that the treble area is not bright, and the bass area is not thick and round enough. The main reason is that the resonance box 1 of the current dulcimer cannot meet the good broadband vibration between the treble area and the bass area, that is, it cannot adapt to the wide frequency change resonance and vibration of the treble area, the middle area and the bass area at the same time. Further research shows that there are many factors affecting the broadband vibration in the resonance box 1, except for the panel 2 and the bottom plate 3, mainly the design problem of the traditional transverse beam 5. The design of the transverse beam 5 of the existing resonance box 1 is unreasonable, which is not conducive to the resonance box 1 to play a good sound wave resonance and vibration between the treble area and the bass area. For example, the transverse beam 5 is supported between the panel 2 and the bottom plate 3 in the resonance box 1 and corresponds to the setting position of the bridge 4. It mainly plays a mechanical role but does not play a good acoustic role.

[0005] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a subject to be studied and solved by the present invention. Summary of the invention

[0006] The purpose of the invention is to provide a dulcimer with an annular integral sound beam.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A dulcimer with an annular integral sound beam comprises a resonance box, the resonance box comprises a panel and a bottom plate; an upper bridge sound beam is mounted on the lower surface of the panel, and the upper bridge sound beam is mounted in a ring shape at the center of the lower surface of the panel;

[0009] Four upper grooves are also provided on the lower surface of the panel, and each of the upper grooves is arranged in a cross shape with the center of the panel in the horizontal direction as the reference, thereby dividing the panel surface located outside the upper bridge-type sound beam into four upper resonance areas; each upper groove crosses the upper bridge-type sound beam in the horizontal direction, and the length direction of the upper groove is perpendicular to the upper bridge-type sound beam;

[0010] Wherein, the upper groove is recessed on the lower surface of the panel to form a sound tunnel.

[0011] The relevant contents in the above technical solution are explained as follows:

[0012] 1. In the above scheme, a lower bridge type sound beam is arranged on the upper surface of the bottom plate, and the lower bridge type sound beam is arranged in a ring shape at the center of the upper surface of the bottom plate;

[0013] Four lower grooves are also provided on the upper surface of the bottom plate, and each of the lower grooves is arranged in a cross shape with the horizontal center of the bottom plate as the reference, thereby dividing the bottom plate surface located outside the lower bridge-type sound beam into four lower resonance areas; each lower groove crosses the lower bridge-type sound beam in the horizontal direction, and is perpendicular to the lower bridge-type sound beam in the length direction of the lower groove;

[0014] Wherein, the lower groove is recessed on the upper surface of the bottom plate to form a sound tunnel.

[0015] 2. In the above scheme, "the upper grooves are arranged in a cross shape with the horizontal center of the panel as the reference", which helps to quickly transmit the vibration of the strings to the surroundings of the panel through the cross-shaped sound tunnel (i.e., the sound tunnel) formed by the grooves;

[0016] "The lower grooves are arranged in a cross shape with the horizontal center of the bottom plate as a reference", which helps to quickly transmit the vibration to the surrounding areas of the bottom plate through the cross-shaped sound tunnel formed by the grooves.

[0017] 3. In the above scheme, the panel and the bottom plate both include a high-pitched area at the periphery, a middle-pitched area at the middle section, and a low-pitched area at the center in terms of the sound frequency band; wherein the wall thickness of the panel and the bottom plate gradually increases from the outside to the inside, the wall thickness of the low-pitched area is greater than that of the middle-pitched area, and the wall thickness of the middle-pitched area is greater than that of the high-pitched area; the upper bridge-type sound beam is located in the low-pitched area of ​​the panel, and the lower bridge-type sound beam is located in the low-pitched area of ​​the bottom plate.

[0018] With this design, by setting the thicker bass area close to the center, the low-frequency vibration with lower frequency and larger amplitude can be made to produce thicker and rounder bass in the bass area of ​​the panel and bottom plate; by setting the thinner treble area far away from the center, the high-frequency vibration with higher frequency and smaller amplitude can be made to produce more transparent and bright treble in the treble area of ​​the panel and bottom plate, thereby effectively improving the timbre and sound quality produced by the yangqin in the entire frequency band.

[0019] 4. In the above solution, the upper bridge-type sound beam and the lower bridge-type sound beam are arranged in a positional relationship in the height direction of the resonance box.

[0020] 5. In the above scheme, each of the upper resonance areas of the panel is provided with a plurality of upper radiation beams, each of the upper radiation beams in the same upper resonance area is arranged in parallel, and one end of at least one of the upper radiation beams faces the geometric center of the panel;

[0021] A plurality of lower radiating sound beams are respectively arranged in each of the lower resonance areas of the bottom plate, and the lower radiating sound beams in the same lower resonance area are arranged in parallel, and one end of at least one of the lower radiating sound beams faces the geometric center of the bottom plate.

[0022] 6. In the above scheme, it also includes a plurality of joists, each of which is vertically arranged and has an upper supporting foot and a lower supporting foot;

[0023] The upper supporting foot is supported and positioned in the upper groove on the lower surface of the panel, and the lower supporting foot is supported and positioned in the lower groove on the upper surface of the base plate, and the width of the upper supporting foot is smaller than the width of the upper groove, and the width of the lower supporting foot is smaller than the width of the lower groove.

[0024] 7. In the above solution, the upper supporting leg is in the shape of an elongated strip, and its length direction corresponds to the length direction of the upper groove; the lower supporting leg is in the shape of an elongated strip, and its length direction corresponds to the length direction of the lower groove.

[0025] 8. In the above solution, the bottom plate is provided with a plurality of sound outlet holes, and the sound outlet holes are located in the lower groove.

[0026] 9. In the above solution, an upper bridge hole is provided at the bottom of the upper bridge-type sound beam, and the upper bridge hole is arranged through the width direction of the upper bridge-type sound beam, and the lower opening of the upper bridge hole corresponds to the upper groove.

[0027] 10. In the above solution, a lower bridge hole is provided at the bottom of the lower bridge-type sound beam, and the lower bridge hole is arranged through the width direction of the lower bridge-type sound beam, and the lower opening of the lower bridge hole corresponds to the lower groove.

[0028] 11. In the above solution, the upper groove and the lower groove are both arc-shaped grooves, which can minimize the thickness change of the panel and the bottom plate, and avoid affecting the resonance and vibration of the panel and the bottom plate.

[0029] 12. In the above solution, a smooth transition surface is provided between the outer end of the upper groove and the lower surface of the panel; a smooth transition surface is provided between the outer end of the lower groove and the upper surface of the bottom plate.

[0030] The working principle and advantages of the present invention are as follows:

[0031] The present invention discloses a dulcimer with an annular integral sound beam, comprising a resonance box, which comprises a panel and a bottom plate; an upper bridge-type sound beam is arranged on the lower surface of the panel in a ring shape at the center of the lower surface of the panel; four upper grooves are also arranged on the lower surface of the panel, and each upper groove is arranged in a cross shape, dividing the panel surface located outside the upper bridge-type sound beam into four upper resonance areas; each upper groove crosses the upper bridge-type sound beam in the horizontal direction, and is perpendicular to the upper bridge-type sound beam in the length direction; the upper groove is recessed on the lower surface of the panel to form a sound tunnel.

[0032] Compared with the prior art, in order to solve the problem that the existing dulcimer cannot take into account the high, middle and low ranges and have good resonance timbre, the present invention improves the existing dulcimer, especially the panel design of the dulcimer. It is specifically embodied in the following aspects: first, an upper bridge-type sound beam is set on the panel; second, a cross-shaped groove is opened on the panel, thereby forming a cross-shaped sound tunnel on the panel.

[0033] Aiming at the problem that the high pitch of the existing dulcimer is not bright, and the bass is not thick and round enough, the present invention conducts in-depth discussion and research on the design and sound-generating mechanism of the dulcimer, and finds out that the main reason for the poor timbre of the high and bass of the existing dulcimer is due to the unreasonable design of the panel. Based on this, the inventor breaks the constraints of the previous dulcimer composition design and boldly proposes the improved design scheme of the present invention. This improved design scheme changes the panel from the previous free vibration mode to the current standard vibration mode, and solves the problem that the high pitch of the dulcimer is not bright, and the bass is not thick and round enough from the perspective of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantive characteristics and significant technical progress, and has achieved obvious technical effects.

[0034] Due to the application of the above technical solution, the present invention has the following advantages and effects compared with the existing dulcimer:

[0035] 1. The present invention sets an upper bridge-type sound beam on the panel. Since the bass has a larger amplitude and lower frequency than the treble, the bass resonance is concentrated in the central area of ​​the panel, and the treble resonance is concentrated in the surrounding edge areas of the panel. Strengthening the strength of the central area of ​​the panel plays an important role in improving the timbre and sound quality of the bass area. Since the thickness of the panel is a gradual thickness structure with thicker central area and thinner surrounding areas, the strength of the central area of ​​the panel is strengthened, and the thickness difference between the central area of ​​the panel and the surrounding edge areas is relatively changed, which plays an important role in improving the timbre and sound quality of the treble area.

[0036] The same design concept is also applicable to the improvement of the bottom plate, that is, by setting a lower bridge-type sound beam on the bottom plate, it can play an auxiliary role in improving the timbre and sound quality of the dulcimer.

[0037] 2. The present invention provides a cross-shaped groove on the panel, which actually forms a cross-shaped sound tunnel on the panel. The vibration is collected by the center of the panel and quickly transmitted to the edges of the panel through the cross-shaped sound tunnel (i.e., the sound tunnel), which plays a key role in improving the timbre and sound quality of the bass and treble areas.

[0038] The same design concept is also applicable to the improvement of the bottom plate, that is, by opening a cross-shaped groove on the bottom plate, it can help improve the tone and sound quality of the dulcimer.

[0039] 3. The present invention divides the panel into four equal resonance areas through the design of the upper bridge sound beam and the cross-shaped groove. When the dulcimer is played, the vibration of the strings is first transmitted to the central area of ​​the panel, and then transmitted to each resonance area through the sound tunnel, and resonance and vibration are generated, thereby amplifying the string sound into the resonance sound of the panel. Before the improvement, the dulcimer can only produce four sound waves when playing, that is, in the resonance cavity, the area corresponding to the panel is a resonance area, and the area corresponding to the bottom plate is a resonance area. Each resonance area produces a sound wave, plus a string wave, plus a percussion wave, a total of four sound waves. After the improvement, the dulcimer of the present invention can produce seven sound waves when playing, among which the four resonance areas of the panel produce four sound waves, one sound wave of the bottom plate, plus a string wave, plus a percussion wave, a total of seven sound waves.

[0040] If a cross-shaped groove is also provided on the bottom plate, by equally dividing the bottom plate into four resonance areas, the improved dulcimer of the present invention can generate ten sound waves when playing, wherein the four resonance areas of the panel generate four sound waves, the four resonance areas of the bottom plate generate four sound waves, plus one string wave, plus one firing wave, for a total of ten sound waves.

[0041] The sound wave quantity is the number of sound waves. For a stringed instrument with a specific resonance box, in addition to a string wave quantity and a percussion wave quantity, it mainly depends on the number of resonance areas in the resonance box. Usually, when the instrument is played, each resonance area generates a sound wave quantity, and the number of sound waves generated depends on the number of resonance areas. In addition, the sound wave quantity directly affects the timbre, penetration and volume of the instrument. Therefore, the invention design can significantly improve the timbre of the high and low pitch areas and increase the penetration of the high and low pitch areas.

[0042] 4. The grooves of the present invention are all arc-shaped, which can reduce the thickness mutation of the panel as much as possible and avoid affecting the resonance and vibration of the panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Attached Figure 1 This is a schematic diagram of the structure of a traditional dulcimer (the strings are not shown);

[0044] Attached Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0045] Attached Figure 3 for Figure 1 Schematic diagram of the cross section along the BB direction;

[0046] Attached Figure 4 It is a schematic diagram of the structure of the lower surface of the panel of a traditional dulcimer;

[0047] Attached Figure 5 This is a schematic diagram of the structure of the bottom plate of a traditional dulcimer;

[0048] Attached Figure 6 This is a schematic diagram of the structure of the lower surface of the panel according to an embodiment of the present invention;

[0049] Attached Figure 7 for Figure 6 Schematic diagram of the AA section;

[0050] Attached Figure 8 This is a schematic diagram of the structure of the upper surface of the bottom plate according to an embodiment of the present invention;

[0051] Attached Fig. 9 for Figure 8 Schematic diagram of the AA section;

[0052] Attached Fig.10 It is a schematic diagram of the structure of the upper radiation sound beam of an embodiment of the present invention;

[0053] Attached Fig.11 It is a side view schematic diagram of the upper radiation sound beam of an embodiment of the present invention;

[0054] Attached Fig.12 This is a schematic diagram of the structure of a joist according to an embodiment of the present invention;

[0055] Attached Fig.13 It is a schematic side view of a joist according to an embodiment of the present invention.

[0056] In the above drawings: 1. resonance box; 2. top plate; 3. bottom plate; 4. bridge; 5. transverse sound beam; 6. sound hole; 7. hole; 8. top plate; 8a. upper resonance area; 9. bottom plate; 9a. lower resonance area; 10. upper bridge beam; 11. lower bridge beam; 12. upper groove; 13. upper bridge hole; 14. sound hole; 15. lower groove; 16. lower bridge hole; 17. upper radiating sound beam; 18. hole; 19. lower radiating sound beam; 20. joist; 20a. upper supporting foot; 20b. lower supporting foot. DETAILED DESCRIPTION

[0057] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0058] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0059] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0060] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0061] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0062] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0063] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0064] See attached Figures 6 to 13 As shown, a dulcimer with an annular integral sound beam comprises a resonance box, which includes a panel 8 and a bottom plate 9.

[0065] Wherein, an upper bridge type sound beam 10 is mounted on the lower surface of the panel 8, and the upper bridge type sound beam 10 is mounted in a ring shape at the center of the lower surface of the panel 8;

[0066] Four upper grooves 12 are also provided on the lower surface of the panel 8, and each of the upper grooves 12 is arranged in a cross shape with the center of the panel 8 in the horizontal direction as the reference, thereby dividing the surface of the panel 8 located outside the upper bridge-type sound beam 10 into four upper resonance areas 8a; each upper groove 12 crosses the upper bridge-type sound beam 10 in the horizontal direction, and the length direction of the upper groove 12 is perpendicular to the upper bridge-type sound beam 10;

[0067] The upper groove 12 is recessed on the lower surface of the panel 8 to form a sound tunnel.

[0068] A lower bridge-type sound beam 11 is arranged on the upper surface of the bottom plate 9, and the lower bridge-type sound beam 11 is arranged in a ring shape at the center of the upper surface of the bottom plate 9;

[0069] Four lower grooves 15 are also provided on the upper surface of the bottom plate 9, and each of the lower grooves 15 is arranged in a cross shape with the horizontal center of the bottom plate 9 as the reference, thereby dividing the surface of the bottom plate 9 located outside the lower bridge-type sound beam 11 into four lower resonance areas 9a; each lower groove 15 crosses the lower bridge-type sound beam 11 in the horizontal direction, and is perpendicular to the lower bridge-type sound beam 11 in the length direction of the lower groove 15;

[0070] The lower groove 15 is recessed on the upper surface of the bottom plate 9 to form a sound tunnel.

[0071] Preferably, an upper bridge hole 13 is provided at the bottom of the upper bridge-type sound beam 10, and the upper bridge hole 13 is arranged through the width direction of the upper bridge-type sound beam 10, and the lower opening of the upper bridge hole 13 corresponds to the upper groove 12. The sound beam is designed as an upper bridge-type sound beam 10 structure, especially an upper bridge hole 13 (hole gap) is designed on one side of the sound beam, so that the upper bridge-type sound beam 10 is like a bridge arch structure. When such an upper bridge-type sound beam 10 is erected on the sound tunnel, it is more conducive to transmitting vibration through the sound tunnel, so as to be more conducive to the resonance and rapid vibration response of the panel 8.

[0072] Preferably, a lower bridge hole 16 is provided at the bottom of the lower bridge-type sound beam 11, and the lower bridge hole 16 is arranged through the width direction of the lower bridge-type sound beam 11, and the lower opening of the lower bridge hole 16 corresponds to the lower groove 15. The sound beam is designed as a lower bridge-type sound beam 11 structure, especially a lower bridge hole 16 (hole gap) is designed on one side of the sound beam, so that the lower bridge-type sound beam 11 is like a bridge arch structure. When such a lower bridge-type sound beam 11 is erected on the sound tunnel, it is more conducive to transmitting vibration through the sound tunnel, so as to be more conducive to the resonance and rapid vibration response of the bottom plate 9.

[0073] Preferably, the upper bridge type sound beam 10 and the lower bridge type sound beam 11 are arranged in alignment in the height direction of the resonance box.

[0074] Preferably, a plurality of upper radiation beams 17 are respectively provided in each of the upper resonance regions 8a of the panel 8, and the upper radiation beams 17 in the same upper resonance region 8a are arranged in parallel, and one end of at least one of the upper radiation beams 17 faces the geometric center of the panel 8;

[0075] A plurality of lower radiating sound beams 19 are respectively provided in each of the lower resonance areas 9a of the bottom plate 9, and each of the lower radiating sound beams 19 in the same lower resonance area 9a is arranged in parallel, and one end of at least one of the lower radiating sound beams 19 faces the geometric center of the bottom plate 9. The inner end thickness of the upper radiating sound beam 17 and the lower radiating sound beam 19 is greater than the outer end thickness, and the central area of ​​the panel 8 and the bottom plate 9 can be strengthened respectively.

[0076] Preferably, it also includes several supporting beams 20, each of which is vertically arranged and has an upper supporting foot 20a and a lower supporting foot 20b, so as to strengthen the overall structure of the dulcimer; the upper supporting foot 20a is supported and positioned in the upper groove 12 on the lower surface of the panel 8, and the lower supporting foot 20b is supported and positioned in the lower groove 15 on the upper surface of the base plate 9, and the width of the upper supporting foot 20a is smaller than the width of the upper groove 12, and the width of the lower supporting foot 20b is smaller than the width of the lower groove 156.

[0077] A circular hole 18 (air eye) is opened on the supporting beam 20 to allow the resonated sound waves to convect in the resonance box and then be transmitted through the sound outlet 14 .

[0078] Among them, the upper supporting foot 20a is in the shape of a slender strip, and its length direction corresponds to the length direction of the upper groove 12, which can avoid interference with the sound tunnel; the lower supporting foot 20b is in the shape of a slender strip, and its length direction corresponds to the length direction of the lower groove 15, which can avoid interference with the sound tunnel.

[0079] The bottom plate 9 is provided with a plurality of sound outlet holes 14 , and the sound outlet holes 14 are located in the lower groove 15 .

[0080] Preferably, the panel 8 and the bottom plate 9 both include a high-pitched area at the periphery, a middle-pitched area at the middle section, and a low-pitched area at the center in terms of the sound frequency band; wherein the wall thickness of the panel 8 and the bottom plate 9 gradually increases from the outside to the inside, the wall thickness of the low-pitched area is greater than the wall thickness of the middle-pitched area, and the wall thickness of the middle-pitched area is greater than the wall thickness of the high-pitched area. With this design, by setting the thicker low-pitched area close to the center, the low-frequency vibration with a lower frequency and a larger amplitude can emit a more mellow and rounded bass in the low-pitched area of ​​the panel 8 and the bottom plate 9; by setting the thinner high-pitched area far from the center, the high-frequency vibration with a higher frequency and a smaller amplitude can emit a more transparent and bright high-pitched sound in the high-pitched area of ​​the panel 8 and the bottom plate 9. The upper bridge-type sound beam 10 and the lower bridge-type sound beam 11 are both located in the low-pitched area, which can further increase the load of the middle area of ​​the panel 8 and the bottom plate 9.

[0081] Preferably, each of the grooves is an arc-shaped groove, which can minimize the thickness change of the panel 8 and the bottom plate 9 and avoid affecting the resonance and vibration of the panel 8 and the bottom plate 9.

[0082] A smooth transition surface is provided between the outer end of the upper groove 12 and the lower surface of the panel 8, so that the vibration is more evenly transmitted to the periphery of the panel 8. A smooth transition surface is provided between the outer end of the lower groove 15 and the upper surface of the bottom plate 9, so that the vibration is more evenly transmitted to the periphery of the bottom plate 9.

[0083] The following is an explanation of other implementations and structural changes of the present invention:

[0084] 1. In the above embodiments, the dulcimer shown in the figure is only used as an example for illustration, and its structure is not used to limit the protection scope of the present invention. Other dulcimers with similar structures that adopt the technical features of the present invention should be covered within the protection scope of the present invention.

[0085] 2. In the above embodiments, an upper bridge hole 13 is provided on the upper bridge-type sound beam 10, and a lower bridge hole 16 is provided on the lower bridge-type sound beam 11, but the present invention is not limited to this. No bridge hole may be provided, or other structures similar to the bridge hole may be provided to facilitate the transmission of vibration through the sound tunnel, which is easily understood and accepted by those skilled in the art.

[0086] 3. In the above embodiments, the number of the upper bridge type sound beam 10 and the lower bridge type sound beam 11 is not limited to one group, and can also be multiple groups arranged in parallel or other designs that help to strengthen the load on the middle part of the panel 8 and the bottom plate 9, which is easily understood and accepted by those skilled in the art.

[0087] 4. In the above embodiments, the upper groove 12 and the lower groove 15 are arc-shaped grooves. However, the present invention is not limited thereto, and the grooves can be designed into other shapes, such as V-shaped, U-shaped, W-shaped and other concave structures. This is easily understood and accepted by those skilled in the art.

[0088] 5. In the above embodiments, when observing from the cross section of the resonance box, the upper bridge beam 10 and the lower bridge beam 11 are arranged in a corresponding position in the vertical direction (see Figure 3 ). However, the present invention is not limited thereto, and the arrangement may not be aligned, and may be specifically determined when the resonance box is debugging the timbre and sound quality. This is easily understood and accepted by those skilled in the art.

[0089] 6. In the above embodiment, the upper bridge-type sound beam 10 and the lower bridge-type sound beam 11 have the same shape and size. However, the present invention is not limited thereto, and the shape and size of the upper bridge-type sound beam 10 and the lower bridge-type sound beam 11 may also be different. Specifically, it can be determined when the resonance box is adjusted for timbre and sound quality. This is easily understood and accepted by those skilled in the art.

[0090] Aiming at the problem that the high pitch of the existing dulcimer is not bright, and the bass is not thick and round enough, the present invention conducts in-depth discussion and research on the design and sound-generating mechanism of the dulcimer, and finds out that the main reason for the poor timbre of the high and bass of the existing dulcimer is due to the unreasonable design of the panel. Based on this, the inventor breaks the constraints of the previous dulcimer composition design and boldly proposes the improved design scheme of the present invention. This improved design scheme changes the panel from the previous free vibration mode to the current standard vibration mode, and solves the problem that the high pitch of the dulcimer is not bright, and the bass is not thick and round enough from the perspective of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantive characteristics and significant technical progress, and has achieved obvious technical effects.

[0091] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A dulcimer with an annular integral sound beam, characterized in that: The resonant box comprises a panel (8) and a bottom plate (9); An upper bridge-type sound beam (10) is mounted on the lower surface of the panel (8); the upper bridge-type sound beam (10) is ring-shaped and is mounted at the center of the lower surface of the panel (8); Four upper grooves (12) are also provided on the lower surface of the panel (8), and each of the upper grooves (12) is arranged in a cross shape with the center of the panel (8) in the horizontal direction as a reference, thereby dividing the surface of the panel (8) located outside the upper bridge-type sound beam (10) into four upper resonance areas (8a); each of the upper grooves (12) crosses the upper bridge-type sound beam (10) in the horizontal direction, and the length direction of the upper groove (12) is perpendicular to the upper bridge-type sound beam (10); Wherein, the upper groove (12) is recessed on the lower surface of the panel (8) to form a sound tunnel; The panel (8) is divided into a high-pitched area at the periphery, a middle-pitched area at the middle section, and a low-pitched area at the center in terms of the sound frequency band; The wall thickness of the panel (8) gradually increases from the outside to the inside, the wall thickness of the bass region is greater than the wall thickness of the mid-range region, and the wall thickness of the mid-range region is greater than the wall thickness of the treble region; The upper bridge-type sound beam (10) is located in the bass region of the panel (8).

2. The dulcimer with annular integral sound beam according to claim 1, characterized in that: A lower bridge-type sound beam (11) is mounted on the upper surface of the bottom plate (9); the lower bridge-type sound beam (11) is ring-shaped and is mounted at the center of the upper surface of the bottom plate (9); Four lower grooves (15) are also provided on the upper surface of the bottom plate (9), and each of the lower grooves (15) is arranged in a cross shape with the center of the bottom plate (9) in the horizontal direction as a reference, thereby dividing the surface of the bottom plate (9) located outside the lower bridge-type sound beam (11) into four lower resonance areas (9a); each of the lower grooves (15) crosses the lower bridge-type sound beam (11) in the horizontal direction, and the length direction of the lower groove (15) is perpendicular to the lower bridge-type sound beam (11); The lower groove (15) is recessed on the upper surface of the bottom plate (9) to form a sound tunnel.

3. The dulcimer with annular integral sound beam according to claim 2, characterized in that: The bottom plate (9) is divided into a high-pitched area at the periphery, a mid-pitched area at the middle section, and a low-pitched area at the center in terms of the sound frequency band; The wall thickness of the bottom plate (9) gradually increases from the outside to the inside, and the wall thickness of the bass region is greater than the wall thickness of the mid-range region, and the wall thickness of the mid-range region is greater than the wall thickness of the treble region; The lower bridge-type sound beam (11) is located in the bass area of ​​the bottom plate (9).

4. The dulcimer with annular integral sound beam according to claim 2, characterized in that: The upper bridge-type sound beam (10) and the lower bridge-type sound beam (11) are arranged in a symmetrical manner in the height direction of the resonance box.

5. The dulcimer with annular integral sound beam according to claim 2, characterized in that: It also includes a plurality of joists (20), each of the joists (20) being vertically arranged and having an upper supporting foot (20a) and a lower supporting foot (20b); The upper supporting foot (20a) is supported and positioned in the upper groove (12) on the lower surface of the panel (8), and the lower supporting foot (20b) is supported and positioned in the lower groove (15) on the upper surface of the base plate (9), and the width of the upper supporting foot (20a) is smaller than the width of the upper groove (12), and the width of the lower supporting foot (20b) is smaller than the width of the lower groove (15).

6. The dulcimer with annular integral sound beam according to claim 5, characterized in that: The upper supporting foot (20a) is in the shape of an elongated strip, and its length direction corresponds to the length direction of the upper groove (12); The lower supporting foot (20b) is in the shape of an elongated strip, and its length direction corresponds to the length direction of the lower groove (15).

7. The dulcimer with annular integral sound beam according to claim 2, characterized in that: A plurality of sound outlet holes (14) are provided on the bottom plate (9), and the sound outlet holes (14) are located in the lower groove (15).

8. The dulcimer with annular integral sound beam according to claim 1, characterized in that: An upper bridge hole (13) is provided at the bottom of the upper bridge-type sound beam (10), and the upper bridge hole (13) is arranged to penetrate in the width direction of the upper bridge-type sound beam (10), and the lower opening of the upper bridge hole (13) corresponds to the upper groove (12).

9. The dulcimer with annular integral sound beam according to claim 2, characterized in that: A lower bridge hole (16) is provided at the bottom of the lower bridge-type sound beam (11), and the lower bridge hole (16) is arranged to penetrate in the width direction of the lower bridge-type sound beam (11), and the lower opening of the lower bridge hole (16) corresponds to the lower groove (15).

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