A new four-string national musical instrument

Abstract

The application discloses a new four-string national musical instrument, relates to the technical field of plucked musical instruments, and comprises a head, a bridge and a resonance box arranged in sequence from top to bottom, characterized in that the plucked musical instrument further comprises a string plucking group arranged in front of the bridge and the resonance box, the string plucking group comprises first, second, third and fourth strings which are parallel to each other, the front side of the resonance box is provided with a sound hole which is opposite to the string plucking group, the top of the string plucking group is connected with a string tuning assembly arranged in the head, the bottom of the string plucking group is connected with a positioning assembly arranged at the bottom of the resonance box, and the string tuning assembly is used for adjusting the tension degree of the first, second, third and fourth strings. The application has the advantages of being capable of forming various complete chords, having a wide tone color range and good use experience.

Description

Technical Field

[0001] This invention relates to the field of plucked string musical instruments, specifically to a novel four-stringed traditional Chinese musical instrument. Background Technology

[0002] Among the Mongolian folk musical instruments, there are various plucked string instruments. However, the current range of plucked string instruments is insufficient, and there is always a shortage of notes when fully expressing a harmony, resulting in the inability to express a complete harmony. Therefore, in order to achieve a variety of timbre expressions and solve the problem of not being able to fully express a complete harmony, it is necessary to design a new plucked string instrument. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a novel four-stringed ethnic musical instrument.

[0004] A novel four-stringed traditional musical instrument includes a headstock, a nut, and a soundbox arranged sequentially from top to bottom. Its distinguishing feature is the inclusion of a plucking assembly positioned in front of the nut and soundbox. The plucking assembly comprises a first string, a second string, a third string, and a fourth string that are parallel to each other. A tone hole is provided on the front side of the soundbox, directly opposite the plucking assembly. A tuning assembly is connected to the top of the plucking assembly and positioned at the headstock. A positioning assembly is connected to the bottom of the plucking assembly and positioned at the bottom of the soundbox. The tuning assembly is used to adjust the tension of the first, second, third, and fourth strings.

[0005] Preferably, the nut includes a retaining frame at the top, the headstock includes a pull-out portion that passes through the retaining frame and can slide along the retaining frame, the tuning assembly is disposed inside the pull-out portion, and a connecting and fixing structure is provided between the pull-out portion and the retaining frame; the resonator includes an outer body and an inner body located inside the outer body, the tone hole is connected to a sound inlet channel that connects to the inner body, the positioning assembly includes a sliding groove and a mounting block, the bottom of the plucking group is fixed on the mounting block, the sliding groove is vertically opened on the front side of the outer body, the mounting block is engaged with the sliding groove and can slide along the surface of the sliding groove, a pushing block is fixed on the mounting block above the bottom surface of the inner wall of the outer body, a first elastic part is provided between the pushing block and the bottom surface of the outer wall of the inner body, and a second elastic part is provided between the top surface of the inner wall of the outer body and the top surface of the outer wall of the inner body; the mounting block is connected to a lifting structure disposed at the bottom of the resonator, the lifting structure being used to drive the mounting block to slide along the surface of the sliding groove.

[0006] Preferably, a sealing and isolation structure connecting the inner cabinet is provided between the sound inlet channel and the outer cabinet. This sealing and isolation structure seals the interior of the outer cabinet and also separates the sound inlet channel from the interior of the outer cabinet. To minimize vibration transmission between the outer cabinet and the sound inlet channel, an integral sealing and isolation structure within the inner cabinet separates the sound inlet channel from the outer cabinet. This does not affect the vibration enhancement effect of the inner cabinet and also isolates the interior of the outer cabinet from the outside environment, preventing the outer cabinet from directly participating in vibration enhancement and affecting the tonal reproduction.

[0007] Preferably, the sealing and isolation structure includes: a side plate portion fixed to the inner cabinet and parallel to the side wall of the sound inlet channel; a sealing ring portion extending from the end of the side plate portion; and a sealing adhesive portion disposed between the outer side of the side plate portion and the inner wall of the outer cabinet; wherein, the sealing ring portion contacts the side wall of the sound inlet channel, a gap exists between the sealing ring portion and the outer cabinet, the side plate portion and the sealing ring portion are used to separate the sound inlet channel from the interior of the outer cabinet, the sealing adhesive portion is used to connect the outer cabinet and the inner cabinet, and the sealing adhesive portion is also used to seal the interior of the outer cabinet. The side plate portion and the sealing ring portion reliably separate the outer cabinet from the sound inlet channel; the sealing adhesive portion has a certain deformation capacity, thereby ensuring that a gap exists between the sealing ring portion and the outer cabinet, forming a certain buffer and vibration reduction, preventing the outer cabinet from participating in the vibration enhancement process of the inner cabinet, and presenting a more accurate tone.

[0008] Preferably, the mounting block includes: a locking portion that is engaged within a sliding groove; a mounting portion fixed to the locking portion and extending into the interior of the outer casing; and a fixing portion fixed to the locking portion and extending to the outer surface of the outer casing. The mounting portion is secured to the pushing block, and the mounting portion is also fitted with a lifting structure. The lifting structure is used to move the mounting portion, causing the locking portion to slide along the surface of the sliding groove. The locking portion can move along the sliding groove, thereby restricting the movement direction of the mounting portion and the fixing portion. When the lifting structure moves the mounting portion, the locking portion, the mounting portion, and the fixing portion move together.

[0009] Preferably, the lifting structure includes an adjusting screw passing through the bottom of the outer casing and the mounting part, with a rotating head fixed to the bottom of the adjusting screw on the outer bottom surface of the outer casing. Rotating the rotating head can drive the adjusting screw to rotate, thereby allowing the mounting part to move along the centerline of the adjusting screw.

[0010] Preferably, the pull-out part includes an arc-shaped pull-out body passing through the retaining frame. The arc-shaped pull-out body has multiple fixing holes evenly distributed along its circumference on its side. The connecting fixing structure passes through the retaining frame and extends into any of the fixing holes. The arc-shaped pull-out body makes the headstock more three-dimensional and aesthetically pleasing. By allowing the arc-shaped pull-out body to slide along the retaining frame, different fixing holes are positioned within the retaining frame, thereby utilizing the fixing structure passing through the fixing holes within the retaining frame to achieve fixing at different positions.

[0011] Preferably, the outer enclosure includes a first panel on the front, a first side panel on the side, and a first back panel on the rear. The sliding groove is formed at the bottom of the first panel, and the sound hole is formed in the upper middle part of the first panel. The first side panel is formed by folding from the same piece of raw material, which improves the structural stability between the various panels of the outer enclosure.

[0012] Preferably, the inner cabinet includes a second panel on the front, a second side panel on the side, and a second back panel on the rear, with the sound inlet extending from the upper part of the second panel into the interior of the inner cabinet. Similarly, the second side panel is formed by folding from the same piece of raw material, improving the structural stability between the various panels of the inner cabinet.

[0013] Preferably, both the first elastic part and the second elastic part are composed of compression springs. The first elastic part and the second elastic part always generate a certain pressure, that is, the compression spring is always in a compressed state.

[0014] The beneficial effects of this invention are reflected in:

[0015] 1. In this invention, the entire new four-stringed ethnic instrument is formed by the first, second, third, and fourth strings. The basic harmony requires three notes to express a complete harmony. The four strings can easily combine to form a complete harmony. Two- or three-stringed plucked instruments always have a shortage of notes when fully expressing a harmony. This invention solves the problem of insufficient range of Mongolian two- or three-stringed plucked instruments. At the same time, it can use the fifth tuning method based on DADA, and its harmonic effect will be wider than other Mongolian plucked instruments. The fifth tuning method also highlights that the Nairqin has a higher probability of producing natural harmony during the performance, making it more convenient for the player to play the melody and harmony at the same time. The entire instrument can be used to play a solo melody or as a harmonic accompaniment instrument, or the melody and harmony can be played simultaneously.

[0016] 2. In this invention, the resonator is designed with separate outer and inner cabinets to prevent mutual interference between them. This design ensures that the inner cabinet is not exposed to external forces, allowing for more reliable and complete vibration with the air and enhancing vibration energy. Simultaneously, the entire sound hole connects to the sound inlet channel within the inner cabinet, ensuring that air vibrations are transmitted solely to the inner cabinet. This effectively prevents the outer cabinet from directly participating in the vibration enhancement process, further preventing external interference from affecting the inner cabinet's vibration enhancement process, resulting in a fuller, more three-dimensional, and clearer tone. Furthermore, a first and second elastic section are provided between the outer and inner cabinets. This improves the structural stability of the inner cabinet, thereby extending the overall lifespan of the resonator. Additionally, adjusting the length of the first elastic section changes the pressure on the inner cabinet. This adjusts the vibrability of the inner enclosure, thereby regulating its vibration enhancement effect and allowing the entire resonator to produce resonant sounds across various ranges, including deep, mellow, crisp, and resonant. More importantly, the lifting structure moves the mounting block, adjusting the distance between the push block and the inner enclosure, ultimately adjusting the length of the first elastic section. Furthermore, by fixing the bottom of the plectrum assembly to the outside of the mounting block, and the top of the plectrum assembly to the pull-out section, which slides along the retaining frame and is fixed to it via a connecting structure, the pull-out section matches the moved mounting block. That is, after the mounting block rises along the sliding groove, the pull-out section also moves upward along the retaining frame, maintaining the tension of the effective playing part of the plectrum assembly. This not only allows for more accurate adjustment of the vibration enhancement effect of the inner enclosure but also significantly improves the player's experience. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a front view of the structure of the present invention;

[0019] Figure 2 This is a structural connection diagram of the headstock of the present invention;

[0020] Figure 3 This is a perspective view of the resonator box of the present invention.

[0021] Figure label:

[0022] 1-Headstock, 11-Tuning assembly, 12-Drawer, 121-Arched drawer, 122-Fixing hole, 13-Connecting and fixing structure, 2-Nut, 21-Retaining frame, 3-Soundbox, 31-Soundhole, 32-Outer body, 321-First top plate, 322-First side plate, 323-First back plate, 33-Inner body, 331-Second top plate, 332-Second side plate, 333-Second back plate, 34-Sound entrance channel, 4- String assembly, 41-First string, 42-Second string, 43-Third string, 44-Fourth string, 5-Positioning component, 51-Sliding groove, 52-Mounting block, 521-Card slot, 522-Mounting part, 523-Fixing part, 53-Push block, 6-First elastic part, 7-Second elastic part, 8-Lifting structure, 81-Adjusting screw, 82-Rotating head, 9-Sealing and isolation structure, 91-Side plate part, 92-Sealing ring part, 93-Sealing glue part. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0027] like Figures 1 to 3As shown, a novel four-stringed folk musical instrument includes a headstock 1, a nut 2, and a soundbox 3 arranged sequentially from top to bottom. Its distinguishing feature is that it further includes a plucking assembly 4 disposed in front of the nut 2 and the soundbox 3. The plucking assembly 4 includes a first string 41, a second string 42, a third string 43, and a fourth string 44 that are parallel to each other. A tone hole 31 is provided on the front side of the soundbox 3, facing the plucking assembly 4. A tuning assembly 11 disposed on the headstock 1 is connected to the top of the plucking assembly 4, and a positioning assembly 5 disposed on the bottom of the soundbox 3 is connected to the bottom of the plucking assembly 4. The tuning assembly 11 is used to adjust the tension of the first string 41, the second string 42, the third string 43, and the fourth string 44.

[0028] In this embodiment, it should be noted that the entire new four-stringed instrument is formed by the first string 41, the second string 42, the third string 43, and the fourth string 44. The basic harmony requires three notes to express a complete harmony. The four strings can easily combine to form a complete harmony. Two- or three-stringed plucked instruments always have a shortage of notes when fully expressing a harmony. This solves the problem of insufficient range of Mongolian two- or three-stringed plucked instruments. At the same time, it can use the fifth tuning method based on DADA, and its harmonic effect is wider than other Mongolian plucked instruments. The fifth tuning method also highlights that the Nairqin has a higher probability of producing natural harmony during the performance, making it more convenient for the player to play the melody while playing the harmony. The entire instrument can be used to play a solo melody or as a harmonic accompaniment instrument, or the melody and harmony can be played simultaneously.

[0029] Specifically, the nut 2 includes a retaining frame 21 at the top, the headstock 1 includes a pull-out part 12 that passes through the retaining frame 21 and can slide along the retaining frame 21, the tuning assembly 11 is disposed inside the pull-out part 12, and a connecting and fixing structure 13 is provided between the pull-out part 12 and the retaining frame 21; the soundbox 3 includes an outer box 32 and an inner box 33 located inside the outer box 32, the tone hole 31 is connected to a sound inlet channel 34 that connects to the inner box 33, the positioning assembly 5 includes a sliding groove 51 and a mounting block 52, the bottom of the plectrum 4 is fixed on the mounting block 52, and the sliding groove... 51 is vertically opened on the front side of the outer box 32. The mounting block 52 is engaged on the sliding groove 51 and can slide along the surface of the sliding groove 51. A pushing block 53 is fixed on the mounting block 52 and is located above the bottom surface of the inner wall of the outer box 32. A first elastic part 6 is provided between the pushing block 53 and the bottom surface of the outer wall of the inner box 33. A second elastic part 7 is provided between the top surface of the inner wall of the outer box 32 and the top surface of the outer wall of the inner box 33. The mounting block 52 is connected to a lifting structure 8 located at the bottom of the resonance box 3. The lifting structure 8 is used to drive the mounting block 52 to slide along the surface of the sliding groove 51.

[0030] In this embodiment, it should be noted that the resonator 3, through the separate arrangement of the outer cabinet 32 ​​and the inner cabinet 33, prevents mutual interference between the outer cabinet 32 ​​and the inner cabinet 33. To a certain extent, this ensures that the inner cabinet 33 is not exposed to external contact, allowing for more complete and reliable vibration with the air and enhancing vibration energy. Simultaneously, the entire sound hole 31 connects to the sound inlet 31 channel in the inner cabinet 33, ensuring that air vibration is transmitted only to the inner cabinet 33. Therefore, the outer cabinet 32 ​​is effectively prevented from directly participating in the vibration enhancement process, further preventing external interference from affecting the vibration enhancement process of the inner cabinet 33, resulting in a fuller, more three-dimensional, and clearer tone. Furthermore, a first elastic part 6 and a second elastic part 7 are provided between the outer cabinet 32 ​​and the inner cabinet 33. On the one hand, this improves the structural stability of the inner cabinet 33, thereby increasing the service life of the entire resonator 3. On the other hand, adjusting the length of the first elastic part 6 changes the pressure on the inner cabinet 33. This adjusts the vibrability of the inner enclosure 33, thereby regulating the vibration enhancement effect of the inner enclosure 33, allowing the entire resonance box 3 to produce resonant sounds in various ranges, such as deep, mellow, crisp, and loud. More importantly, the lifting structure 8 moves the mounting block 52, adjusting the distance between the push block 53 and the inner enclosure 33, ultimately adjusting the length of the first elastic part 6. Based on this, by fixing the bottom of the plectrum 4 to the outside of the mounting block 52, and fixing the top of the plectrum 4 to the pull-out part 12, the pull-out part 12 can slide along the retaining frame 21 and be fixed to the retaining frame 21 through the connecting fixing structure 13. This allows the pull-out part 12 to match the moved mounting block 52. That is, after the mounting block 52 rises along the sliding groove 51, the pull-out part 12 also moves upward along the retaining frame 21, keeping the tension of the effective playing part of the plectrum 4 unchanged. This not only allows for more accurate adjustment of the vibration enhancement effect of the inner enclosure 33, but also greatly improves the user experience for the performer.

[0031] Specifically, a sealing and isolation structure 9 is provided between the sound inlet channel 34 and the outer cabinet 32 ​​to connect the inner cabinet 33. The sealing and isolation structure 9 is used to seal the inside of the outer cabinet 32 ​​and also to separate the sound inlet channel 34 from the inside of the outer cabinet 32.

[0032] In this embodiment, it should be noted that in order to minimize the vibration transmission between the outer cabinet 32 ​​and the sound inlet channel 34, the sound inlet channel 34 and the outer cabinet 32 ​​are separated by an integral sealed isolation structure 9 of the inner cabinet 33. At the same time, the vibration enhancement effect of the inner cabinet 33 is not affected, and the interior of the outer cabinet 32 ​​is isolated from the outside world, preventing the outer cabinet 32 ​​from directly participating in vibration enhancement and affecting the timbre.

[0033] Specifically, the sealing and isolation structure 9 includes: a side plate portion 91 fixed to the inner cabinet 33 and parallel to the side wall of the sound inlet channel 34; a sealing ring portion 92 extending from the end of the side plate portion 91; and a sealing adhesive portion 93 disposed between the outer side of the side plate portion 91 and the inner wall of the outer cabinet 32; wherein the sealing ring portion 92 contacts the side wall of the sound inlet channel 34, and there is a gap between the sealing ring portion 92 and the outer cabinet 32; the side plate portion 91 and the sealing ring portion 92 are used to separate the sound inlet channel 34 from the interior of the outer cabinet 32; the sealing adhesive portion 93 is used to connect the outer cabinet 32 ​​and the inner cabinet 33; and the sealing adhesive portion 93 is also used to seal the interior of the outer cabinet 32.

[0034] In this embodiment, it should be noted that, as Figure 3 As shown, the side plate 91 and the sealing ring 92 reliably separate the outer cabinet 32 ​​from the sound inlet channel 34; the sealing part 93 has a certain deformation capability, thereby ensuring that there is a gap between the sealing ring 92 and the outer cabinet 32, forming a certain buffer and vibration reduction, preventing the outer cabinet 32 ​​from participating in the vibration enhancement process of the inner cabinet 33, and presenting a more accurate tone.

[0035] Specifically, the mounting block 52 includes: a locking part 521 that is locked in the sliding groove 51; a mounting part 522 that is fixed on the locking part 521 and extends into the outer casing 32; and a fixing part 523 that is fixed on the locking part 521 and extends to the outer side of the outer casing 32; wherein, a pushing block 53 is fixed on the mounting part 522, and a lifting structure 8 is also provided on the mounting part 522. The lifting structure 8 is used to drive the mounting part 522 to move so that the locking part 521 slides along the surface of the sliding groove 51.

[0036] In this embodiment, it should be noted that the locking part 521 can restrict the movement direction of the mounting part 522 and the fixing part 523 by sliding through the groove 51, and when the lifting structure 8 moves the mounting part 522, the locking part 521, the mounting part 522 and the fixing part 523 will move together.

[0037] Specifically, the lifting structure 8 includes an adjusting screw 81 that passes through the bottom of the outer housing 32 and the mounting part 522, and a rotating head 82 located on the outer bottom surface of the outer housing 32 is fixed at the bottom of the adjusting screw 81.

[0038] In this embodiment, it should be noted that rotating the rotating head 82 can drive the adjusting screw 81 to rotate, thereby allowing the mounting part 522 to move along the center line of the adjusting screw 81.

[0039] Specifically, the pull-out part 12 includes an arc-shaped pull-out body 121 that passes through the retaining frame 21. The side of the arc-shaped pull-out body 121 is evenly provided with a plurality of fixing holes 122 along the circumferential direction. The connecting and fixing structure 13 passes through the retaining frame 21 and extends into any fixing hole 122.

[0040] In this embodiment, it should be noted that the arc-shaped pull-out body 121 can make the headstock 1 more three-dimensional and beautiful; by letting the arc-shaped pull-out body 121 slide along the retaining frame 21, different fixing holes 122 are located in the retaining frame 21, thereby using the fixing structure to pass through the fixing holes 122 located in the retaining frame 21 to achieve fixing at different positions.

[0041] Specifically, the outer enclosure 32 includes a first panel 321 on the front, a first side panel 322 on the side, and a first back panel 323 on the rear. A sliding groove 51 is formed at the bottom of the first panel 321, and a sound hole 31 is formed in the upper middle part of the first panel 321.

[0042] In this embodiment, it should be noted that the first panel 321 on the side is made by folding the same piece of raw material, which improves the structural stability between the various panels of the outer box 32.

[0043] Specifically, the inner cabinet 33 includes a second panel 331 on the front, a second side panel 332 on the side, and a second back panel 333 on the rear. The sound inlet channel 34 extends from the upper part of the second panel 331 into the interior of the inner cabinet 33.

[0044] In this embodiment, it should be noted that, similarly, the second panel 331 on the side is made by folding the same piece of raw material, which improves the structural stability between the various panels of the inner box 33.

[0045] Specifically, both the first elastic part 6 and the second elastic part 7 are composed of compression springs.

[0046] In this embodiment, it should be noted that the first elastic part 6 and the second elastic part 7 always generate a certain pressure, that is, the compression spring is always in a compressed state.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit the scope of the invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A novel four-stringed traditional musical instrument, comprising a headstock, a nut, and a soundbox arranged sequentially from top to bottom, characterized in that, It also includes a plucking assembly located in front of the nut and the soundbox. The plucking assembly includes a first string, a second string, a third string, and a fourth string that are parallel to each other. The front side of the soundbox has a tone hole facing the plucking assembly. The top of the plucking assembly is connected to a tuning assembly located in the headstock. The bottom of the plucking assembly is connected to a positioning assembly located at the bottom of the soundbox. The tuning assembly is used to adjust the tension of the first string, the second string, the third string, and the fourth string. The nut includes a retaining frame disposed at the top, the headstock includes a pull-out portion that passes through the retaining frame and can slide along the retaining frame, the tuning assembly is disposed inside the pull-out portion, and a connecting and fixing structure is provided between the pull-out portion and the retaining frame; The resonator includes an outer cabinet and an inner cabinet located inside the outer cabinet. The tone hole is connected to a sound inlet channel that connects to the inner cabinet. The positioning component includes a sliding groove and a mounting block. The bottom of the plectrum is fixed on the mounting block. The sliding groove is vertically opened on the front side of the outer cabinet. The mounting block is engaged with the sliding groove and can slide along the surface of the sliding groove. A pushing block is fixed on the mounting block and disposed above the bottom surface of the inner wall of the outer cabinet. A first elastic part is provided between the pushing block and the bottom surface of the outer wall of the inner cabinet. A second elastic part is provided between the top surface of the inner wall of the outer cabinet and the top surface of the outer wall of the inner cabinet. The mounting block is connected to a lifting structure located at the bottom of the resonating chamber. The lifting structure is used to drive the mounting block to slide along the surface of the sliding groove.

2. The novel four-stringed ethnic musical instrument according to claim 1, characterized in that, A sealing and isolation structure connecting the inner cabinet is provided between the sound inlet channel and the outer cabinet. The sealing and isolation structure is used to seal the inside of the outer cabinet and to separate the sound inlet channel from the inside of the outer cabinet.

3. The novel four-stringed ethnic musical instrument according to claim 2, characterized in that, The sealing and isolation structure includes: The side panel is fixed to the inner cabinet and is parallel to the side wall of the sound inlet channel; The sealing ring extends from the end of the side panel; and A sealing section is provided between the outer side of the side panel and the inner wall of the outer casing; wherein... The sealing ring contacts the side wall of the sound inlet channel, and there is a gap between the sealing ring and the outer cabinet. The side plate and the sealing ring are used to separate the sound inlet channel from the interior of the outer cabinet. The sealing glue is used to connect the outer cabinet and the inner cabinet, and the sealing glue is also used to seal the interior of the outer cabinet.

4. The novel four-stringed ethnic musical instrument according to claim 1, characterized in that, The mounting block includes: A locking part that is fitted into the sliding groove; The mounting part is fixed to the locking part and extends into the outer casing; and A fixing part that is fixed to the locking part and extends to the outer surface of the outer casing; wherein, The push block is fixed on the mounting part, and the lifting structure is also provided on the mounting part. The lifting structure is used to drive the mounting part to move so that the locking part slides along the surface of the sliding groove.

5. The novel four-stringed ethnic musical instrument according to claim 1, characterized in that, The lifting structure includes an adjusting screw that passes through the bottom of the outer box and the mounting part, and a rotating head located on the bottom of the outer side of the outer box is fixed at the bottom of the adjusting screw.

6. The novel four-stringed ethnic musical instrument according to claim 1, characterized in that, The pull-out part includes an arc-shaped pull-out body that passes through the retaining frame. The side of the arc-shaped pull-out body is evenly provided with multiple fixing holes along the circumferential direction. The connecting and fixing structure passes through the retaining frame and extends into any of the fixing holes.

7. The novel four-stringed ethnic musical instrument according to claim 1, characterized in that, The outer enclosure includes a first panel on the front, a first side panel on the side, and a first back panel on the rear. The sliding groove is located at the bottom of the first panel, and the sound hole is located in the upper middle part of the first panel.

8. The novel four-stringed ethnic musical instrument according to claim 7, characterized in that, The inner enclosure includes a second panel on the front, a second side panel on the side, and a second back panel on the rear. The sound inlet channel extends from the upper part of the second panel into the interior of the inner enclosure.

9. The novel four-stringed ethnic musical instrument according to claim 1, characterized in that, Both the first elastic part and the second elastic part are composed of compression springs.

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