CN211294594U

CN211294594U - String instrument with variable timbre

Info

Publication number: CN211294594U
Application number: CN201921673874.8U
Authority: CN
Inventors: 张树岩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-08-18
Anticipated expiration: 2029-10-08

Abstract

The utility model discloses a string instrument with variable timbre, which comprises a resonance box, a rod, a headstock, a bridge, strings and a bow, wherein the rod is fixedly connected with the resonance box, one end of each string is fixedly connected with the rod through a shaft, the other end of each string is fixedly connected with a side panel of the resonance box, the bridge is pressed on front panels at two sides of a sound hole of the resonance box, and the middle part of each string is lapped on the bridge; more than one resonance sub-box which is gradually reduced in equal proportion is sleeved in the resonance box; the sound holes of the resonance box and the common sound sub-box are concentrically arranged, and the sound holes of the resonance box and the common sound sub-box are gradually reduced from outside to inside in equal proportion. The utility model discloses simple structure, the performance of polyphone timbre can be accomplished to a string instrument, can satisfy different performance demands, and the function is various, and when the player had the performance demand of other timbres, need not to change separately or purchase the string instrument of drawing of the resonating box material with this string instrument, shape or variation in size, reduced the burden in the aspect of the economy, avoided extravagant.

Description

String instrument with variable timbre

The technical field is as follows:

the utility model relates to a stringed instrument especially relates to a stringed instrument of variable tone quality.

Background art:

string instruments generally comprise a resonance box, a rod, a headstock, a bridge, strings and a bow, wherein the strings are pulled by the bow, the generated vibration force is transmitted to the resonance box, and the resonance box vibrates to produce sound to play.

The biggest impact on the sound effect of a stringed instrument is the resonator. In order to amplify the sound generated from the strings and transmit the amplified sound to the outside through the resonance box, the front, rear, and side panels of the resonance box are generally processed in a gourd shape using hard wood with linear grains, the front section of the side panel is attached to the inner surface of the edge of the front panel, and the rear section of the side panel is attached to the inner surface of the edge of the rear panel, so that the inside of the resonance box is completely sealed except for the sound holes formed in the front panel.

However, only one resonance box is provided for the existing stringed instruments on the market, so that the tone color of each stringed instrument is single and cannot be changed, one stringed instrument can only meet one playing requirement, the function is single, and when a player has other tone color playing requirements, the player needs to additionally replace or purchase the stringed instrument which is different from the resonance box of the stringed instrument in material, shape or size, so that the economic burden is increased, the waste is greatly caused, and the music expressive force is monotonous, and the playing pleasure of learners and playing is reduced.

The utility model has the following contents:

a first object of the present invention is to provide a variable timbre stringed instrument having a common rear panel for a resonance box and a resonator box.

A second object of the present invention is to provide a variable timbre stringed instrument with a resonator and a resonator box rear panel independent of each other.

The first purpose of the utility model is implemented by the following technical scheme: a string instrument with variable timbre comprises a resonance box, a rod, a headstock, a bridge, strings and a bow, wherein the resonance box comprises a front panel, a side panel and a rear panel, the side edges of the two sides of the side panel are respectively hermetically connected with the front panel and the rear panel, and sound holes are formed in the front panel; the bottom end of the piano rod is fixedly connected with the outer side of the top of the side panel, one end of the string is fixedly connected with the top end of the piano rod through a piano shaft, the other end of the string is fixedly connected with the outer side of the bottom of the side panel, the bridge is arranged outside the front panel on two sides of the sound hole, and the string is lapped with the upper part of the bridge;

more than one resonance sub-box which is gradually reduced in equal proportion is sleeved in the resonance box; each resonance sub-box comprises a sub-box front panel and a sub-box side panel, and one side edge part of the sub-box side panel of each resonance sub-box is hermetically connected with the sub-box front panel of the resonance sub-box; the edge part of the other side of the sub-box side panel of each resonance sub-box is hermetically connected with the rear panel;

sound holes are also formed in a front panel of the sub-box of each resonator, the resonator and the sound holes of the resonator are concentrically arranged, and the sound holes of the resonator are gradually reduced from outside to inside in equal proportion.

Furthermore, the electronic organ further comprises sub-bridges correspondingly arranged with the resonance sub-boxes, and the bridge corresponding to the resonance box and the sub-bridge corresponding to the resonance sub-box are reduced step by step from outside to inside in equal proportion. And each sub-bridge is smaller than the sound hole on the adjacent outer side resonance sub-box or the adjacent outer side resonance box.

Furthermore, a sound making groove is formed in the front panel and the front panel of the sub-box along the length direction of the musical instrument rod, the sound making groove is concentrically arranged, a sound making rod is inserted into the sound making groove, one end of the sound making rod inserted into the sound making groove is a polygonal guide rod, a positioning strip with a plate surface perpendicular to the sound making rod is fixed on the polygonal guide rod, a sliding strip is sleeved on one side, close to the sound making rod, of the polygonal guide rod, the positioning strip is consistent with the sliding strip in the length direction, the lengths of the positioning strip and the sliding strip are larger than the width of the sound making groove, and the widths of the positioning strip and the sliding strip are smaller than the width of the sound making groove;

the damper rod is fixedly provided with a supporting block, a screw rod which is consistent with the damper rod in the length direction is connected in the supporting block in a threaded mode, and one end of the screw rod is abutted to the sliding strip.

Further, be equipped with the inserted bar on the headstock, be equipped with the jack on the musical instrument pole, still be equipped with on the musical instrument pole with the bolt hole of jack intercommunication, the headstock pass through the inserted bar insert in the jack with the musical instrument pole is connected, the inserted bar pass through the puller bolt that sets up in the bolt hole with inserted bar fixed connection.

The second purpose of the utility model is implemented by the following technical scheme: a string instrument with variable timbre comprises a resonance box, a rod, a headstock, a bridge, strings and a bow, wherein the resonance box comprises a front panel, a side panel and a rear panel, the side edges of the two sides of the side panel are respectively hermetically connected with the front panel and the rear panel, and sound holes are formed in the front panel; the bottom end of the piano rod is fixedly connected with the outer side of the top of the side panel, one end of the string is fixedly connected with the top end of the piano rod through a piano shaft, the other end of the string is fixedly connected with the outer side of the bottom of the side panel, the bridge is arranged outside the front panel on two sides of the sound hole, and the string is lapped with the upper part of the bridge;

more than one resonance sub-box which is gradually reduced in equal proportion is sleeved in the resonance box; each resonance sub-box comprises a sub-box front panel, a sub-box side panel and a sub-box rear panel, and the two side edges of the sub-box side panel of each resonance sub-box are hermetically connected with the sub-box front panel and the sub-box rear panel of the resonance sub-box;

sound holes are also formed in the front panel of each resonator, the resonators and the sound holes of the resonators are concentrically arranged, and the resonators and the sound holes of the resonators are reduced from outside to inside in equal proportion step by step.

Furthermore, the rear panel and the sub-box rear panel are sequentially attached and fixedly connected; the electronic resonance box further comprises sub-bridge bodies correspondingly arranged with the resonance sub-boxes, and the bridge bodies corresponding to the resonance sub-boxes and the sub-bridge bodies corresponding to the resonance sub-boxes are reduced from outside to inside in equal proportion step by step.

Furthermore, the rear panel and the sub-box rear panels are sequentially attached and movably connected through guide rods, the guide rods are fixedly arranged on the inner side of the rear panel along the thickness direction of the resonance box, and the guide rods penetrate through the sub-box rear panels and are in sliding connection with the resonance sub-boxes; the resonance box is also connected with each resonance sub-box through a driving device;

the bridge include with the resonance box with the unanimous pressure shoulder of resonance subbox quantity, fixed connection between the pressure shoulder, just the pressure shoulder on the bridge reduces in proper order.

Furthermore, the driving device comprises screw rods with the same number as the resonance sub-boxes, one end of each screw rod is fixedly provided with a stop block, the opposite outer sides of the sub-box back panel or the sub-box side panel of each resonance sub-box are fixedly provided with stop rings, and one end of each screw rod is inserted into the corresponding stop ring of the resonance sub-box and is rotationally connected with the stop ring through the stop block; the other end of each screw rod penetrates through a sub-box rear panel of the resonator corresponding to the outer side of the resonator, and is in threaded connection with the rear panel.

Furthermore, the driving device comprises cam mechanisms with the same number of the resonator boxes, each cam mechanism comprises a cam and a U-shaped groove, the outer side, relative to the side panel, of each resonator box is fixedly provided with the U-shaped groove, the cam is rotatably arranged in each U-shaped groove, and a wheel shaft of each cam penetrates through the cam to correspond to the side panel, relative to the outer side, of the resonator box and is in threaded connection with the side panel.

Furthermore, a sound making groove is formed in the front panel and the front panel of the sub-box along the length direction of the musical instrument rod, the sound making groove is concentrically arranged, a sound making rod is inserted into the sound making groove, one end of the sound making rod inserted into the sound making groove is a polygonal guide rod, a positioning strip with a plate surface perpendicular to the sound making rod is fixed on the polygonal guide rod, a sliding strip is sleeved on one side, close to the sound making rod, of the polygonal guide rod, the length directions of the positioning strip and the sliding strip are consistent, the lengths of the positioning strip and the sliding strip are larger than the width of the sound making groove, and the widths of the positioning strip and the sliding strip are smaller than the width of the sound making groove;

The utility model has the advantages that:

1. the utility model discloses simple structure, a plurality of syntony subboxes are established to the resonator endotheca, consequently, the performance of polyphone tone can be accomplished to a string instrument, can satisfy different performance demands, the function is various, when the player has the performance demand of other timbres, need not to change separately or purchase the resonator material with this string instrument, the string instrument of shape or variation in size, the burden in the aspect of the economy has been reduced, the waste has been avoided, on the other hand music expressive force is diversified, the performance enjoyment of learner and performance has been increased.

2. The utility model discloses convenient operation when changing different syntonizers and resonating and playing, only need to change different bridge, or utilize corresponding syntonizer of drive arrangement drive and bridge contact, can realize the performance of different demands.

3. The utility model discloses still seted up the system sound groove on front panel and subbox front panel, player's accessible slides the system sound pole, makes location strip and slide bar move to system sound inslot different positions to through the lead screw of screwing, make location strip and slide bar clamp front panel or subbox front panel, change the vibration range of resonant tank or resonant tank, change pronunciation effect, in order to reach different performance effects.

4. The utility model discloses well headstock and musical instrument pole set up to components of a whole that can function independently dismantled and assembled type, make things convenient for the change of headstock to adapt to different performance occasions, multiplicable learner's playing interest in addition.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a stringed instrument with variable timbre according to the present invention;

FIG. 2 is a partial schematic view of a stringed musical instrument of variable timbre in embodiment 1;

FIG. 3 is a schematic structural view of a damper of a stringed musical instrument with variable timbre according to the present invention;

FIG. 4 is a schematic view of the connection between the head and the rod of a stringed musical instrument with variable timbre according to the present invention;

FIG. 5 is a partial schematic view of a stringed musical instrument of variable timbre in embodiment 2;

FIG. 6 is a partial schematic view of example 2 with the resonance box removed;

FIG. 7 is another view of FIG. 6;

FIG. 8 is a partial schematic view of a stringed musical instrument of variable timbre in embodiment 3;

fig. 9 is a partial schematic view of example 3 with the resonance box removed.

In the figure: the piano comprises a resonator 1, a front panel 1.1, a side panel 1.2, a back panel 1.3, a sound hole 1.4, a piano rod 2, a piano head 3, a piano bridge 4, a shoulder 4.1, strings 5, a piano shaft 6, a damper groove 7, a damper rod 8, a polygonal guide rod 9, a positioning strip 10, a sliding strip 11, a supporting block 12, a screw rod 13, an inserting rod 14, a jack 15, a bolt hole 16, a puller bolt 17, a driving device 18, a screw rod 18.1, a stop block 18.2, a stop ring 18.3, a cam 18.4, a U-shaped groove 18.5, a guide rod 19, a resonator box 20, a front sub-box panel 20.1, a side panel 20.2, a back sub-box panel 20.3 and a piano bridge 21.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

a variable timbre stringed musical instrument comprising a resonance box 1, a shaft 2, a headstock 3, a bridge 4, strings 5 and a bow (not shown in the figure); three resonance sub-boxes 20 which are reduced in an equal proportion step by step are sleeved in the resonance box 1, the resonance box 1 comprises a front panel 1.1, a side panel 1.2 and a rear panel 1.3, the edge parts of two sides of the side panel 1.2 are respectively connected with the front panel 1.1 and the rear panel 1.3 in a sealing way, each resonance sub-box 20 comprises a sub-box front panel 20.1 and a sub-box side panel 20.2, and one edge part of one side of the sub-box side panel 20.2 of each resonance sub-box 20 is connected with the sub-box front panel 20.1 of the resonance sub-box 20 in a sealing way; the other side edge part of the sub-box side panel 20.2 of each resonance sub-box 20 is hermetically connected with the rear panel 1.3;

the bottom end of the piano rod 2 is fixedly connected with the outer side of the top of the side panel 1.2; one end of the string 5 is fixedly connected with the top end of the piano rod 2 through the piano shaft 6, and the other end of the string 5 is fixedly connected with the outer side of the bottom of the side panel 1.2 of the resonance box 1; the bridge 4 is arranged outside the front panel 1.1 at two sides of the sound hole 1.4, and the strings 5 are lapped with the upper part of the bridge 4;

the front panel 1.1 and the front panel 20.1 of the sub-box are both provided with sound holes 1.4, the sound holes 1.4 of the resonance box 1 and the co-sounding sub-box 20 are concentrically arranged, and the sound holes 1.4 of the resonance box 1 and the co-sounding sub-box 20 are reduced from outside to inside in equal proportion step by step.

Each resonance sub-box 20 is correspondingly provided with a sub-bridge 21, the bridge 4 corresponding to the resonance box 1 and the sub-bridge 21 corresponding to the resonance sub-box 20 are reduced from outside to inside in equal proportion step by step, and the size of each sub-bridge 21 is smaller than that of the sound hole 1.4 on the adjacent outer side resonance sub-box 20 or the resonance box 1.

The musical instrument comprises a front panel 1.1 and a subbox front panel 20.1, wherein the front panel 1.1 and the subbox front panel 20.1 are provided with sound making grooves 7 along the length direction of a musical instrument rod 2, each sound making groove 7 is concentrically arranged, a sound making rod 8 is inserted into each sound making groove 7, one end of each sound making rod 8 inserted into each sound making groove 7 is a polygonal guide rod 9, a positioning strip 10 with a plate surface perpendicular to the sound making rod 8 is fixed on each polygonal guide rod 9, one side of each polygonal guide rod 19 close to the sound making rod 8 is sleeved with a sliding strip 11, each sliding strip 11 can only slide along the length direction of the polygonal guide rod 19 and cannot rotate along the circumferential direction of the polygonal guide rod 19, the length directions of the positioning strip 10 and the sliding strip 11 are consistent, the lengths of the positioning strip 10 and the sliding strip 11 are greater than the width of the sound making grooves 7, and the widths; a supporting block 12 is fixed on the damper rod 8, a screw rod 13 which is consistent with the damper rod 8 in length direction is screwed in the supporting block 12, and one end of the screw rod 13 is abutted against the sliding strip 11.

The headstock 3 is provided with an insert rod 14, the rod 2 is provided with a jack 15, the rod 2 is further provided with a bolt hole 16 communicated with the jack 15, the headstock 3 is inserted into the jack 15 through the insert rod 14 to be connected with the rod 2, and the insert rod 14 is fixedly connected with the insert rod 14 through a puller bolt 17 arranged in the bolt hole 16.

The using method comprises the following steps:

when the stringed instrument in the embodiment selects the resonance box 1 to produce sound, the bridge 4 is pressed on the front panel 1.1 on the two sides of the sound hole 1.4 of the resonance box 1, the strings 5 are pressed on the bridge 4, the shaft 6 is rotated, and the strings 5 are tensioned, so that the stringed instrument can be used.

When the stringed instrument in this embodiment selects the resonator 20 to produce sound, the corresponding sub-bridge 21 is selected, the sub-bridge 21 is pressed on the sub-box front panel 20.1 on both sides of the sound hole 1.4 of the resonator 20, the strings 5 are pressed on the sub-bridge 21, the shaft 6 is rotated, and the strings 5 are tensioned, so that the stringed instrument can be used.

When the stringed instrument in the embodiment uses the damper 8 to adjust the sound effect, one end of the damper 8, which is provided with the positioning strip 10 and the sliding strip 11, is placed into the corresponding resonance box 1 or the corresponding resonance sub-box 20 from the damper groove 7, and the damper 8 is rotated, so that the positioning strip 10 is lapped on the inner side of the front panel 1.1 or the sub-box front panel 20.1, and the sliding strip 11 is lapped on the outer side of the front panel 1.1 or the sub-box front panel 20.1; the damper rod 8 is slid along the damper groove 7 to a designated position, the screw rod 13 is screwed, and the sliding strip 11 is tightly pushed, so that the positioning strip 10 and the sliding strip 11 clamp the front panel 1.1 or the front panel 20.1 of the sub-box at two sides of the damper groove 7, and the vibration amplitude of the resonance box 1 or the resonance sub-box 20 can be changed, and the expected sound production effect is achieved.

Example 2:

a string instrument with variable timbre comprises a resonance box 1, a rod 2, a headstock 3, a bridge 4, strings 5 and a bow; three resonance sub-boxes 20 which are reduced in an equal proportion step by step are sleeved in the resonance box 1, the resonance box 1 comprises a front panel 1.1, a side panel 1.2 and a rear panel 1.3, the side edges of the two sides of the side panel 1.2 are respectively hermetically connected with the front panel 1.1 and the rear panel 1.3, each resonance sub-box 20 comprises a sub-box front panel 20.1, a sub-box side panel 20.2 and a sub-box rear panel 20.3, and the side edges of the two sides of the sub-box side panel 20.2 of each resonance sub-box 20 are respectively hermetically connected with the sub-box front panel 20.1 and the sub-box rear panel 20.3 of the resonance sub-box 20;

the bottom end of the piano rod 2 is fixedly connected with the outer side of the top of the side panel 1.2; one end of the string 5 is fixedly connected with the top end of the piano rod 2 through the piano shaft 6, and the other end of the string 5 is fixedly connected with the outer side of the bottom of the side panel 1.2; the bridge 4 is arranged outside the front panel 1.1 at two sides of the sound hole 1.4, and the strings 5 are lapped with the upper part of the bridge 4;

A guide rod 19 is fixedly arranged on the inner side of the rear panel 1.3 along the thickness direction of the rear panel, and the guide rod 19 penetrates through the rear panels 20.3 of all the sub-boxes and is in sliding connection with all the resonator sub-boxes 20; the resonance box 1 is also connected with each resonance sub-box 20 through a driving device 18;

the bridge 4 comprises pressing shoulders 4.1 with the same number as the resonance box 1 and the resonance sub-box 20, the pressing shoulders 4.1 are fixedly connected, the size of the pressing shoulders 4.1 on the bridge 4 is reduced in sequence, and each pressing shoulder 4.1 is larger than the size of the corresponding opening of the sound hole 1.4 on the resonance box 1 or the resonance sub-box 20 and smaller than the size of the opening of the sound hole 1.4 on the resonance box 1 or the resonance sub-box 20 outside the resonance box 20;

the driving device 18 comprises screw rods 18.1 with the same number as the resonator boxes 20, one end of each screw rod 18.1 is fixedly provided with a stop block 18.2, the opposite outer side of each sub-box side panel 20.2 is fixedly provided with a stop ring 18.3, one end of each screw rod 18.1 is inserted into the stop ring 18.3 of the corresponding resonator box 20 and is rotationally connected with the stop ring 18.3 through the stop block 18.2; the other end of each screw 18.1 penetrates through a sub-box back panel 20.3 of the sub-box 20 on the opposite outer side of the corresponding sub-box 20 and is in threaded connection with the back panel 1.3.

The using method comprises the following steps:

when the stringed instrument in the embodiment selects the resonance box 1 to produce sound, the shoulder 4.1 corresponding to the resonance box 1 on the bridge 4 is contacted with the front panels 1.1 on the two sides of the sound hole 1.4 of the resonance box 1, and the tensioning degree of the strings 5 is adjusted through the shaft 6, so that the stringed instrument can be used.

When the string instrument in this embodiment selects the resonator box 20 to produce sound, the screw 18.1 connected to the resonator box 20 is screwed to move the resonator box 20 along the guide rod 19 toward the front panel 1.1, and the bridge 4 is jacked up by the front panel 20.11.1 of the sub-box on both sides of the sound hole 1.4 of the resonator box 20 until the bridge 4 is disconnected from the resonator box 1 and other resonator boxes 20, and then the screw 18.1 is stopped to rotate, and the tension degree of the strings 5 is adjusted by the shaft 6, so that the string instrument can be used.

The stringed musical instrument in this embodiment is used in a manner identical to that in embodiment 1 when the sound effect is adjusted using the damper 8.

Example 3:

the driving device 18 comprises cam mechanisms with the same number with the resonator boxes 20, each group of cam mechanisms comprises a cam 18.4 and a U-shaped groove 18.5, the relative outer side of each sub-box side panel 20.2 is fixedly provided with the U-shaped groove 18.5, each U-shaped groove 18.5 is internally provided with the cam 18.4 in a rotating mode, and the wheel shaft of each cam 18.4 penetrates through the sub-box side panel 20.2 of the resonator box 20, corresponding to the resonator box 20, on the relative outer side of the resonator box 20, and is in threaded connection with the side panel 1.2.

The using method comprises the following steps:

When the stringed instrument in the embodiment selects the resonator box 20 to produce sound, the axle of the cam 18.4 connected with the resonator box 20 is rotated to move the resonator box 20 along the guide rod 19 toward the front panel 1.1, the front panel 20.1 of the sub-box on both sides of the sound hole 1.4 of the resonator box 20 jacks up the bridge 4, the bridge 4 is disconnected from the resonator box 1 and other resonator boxes 20, and the tension degree of the strings 5 is adjusted through the shaft 6, so that the stringed instrument can be used.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A string instrument with variable timbre comprises a resonance box, a rod, a headstock, a bridge, strings and a bow, wherein the resonance box comprises a front panel, a side panel and a rear panel, the side edges of the two sides of the side panel are respectively hermetically connected with the front panel and the rear panel, and sound holes are formed in the front panel; the bottom end of the piano rod is fixedly connected with the outer side of the top of the side panel, one end of the string is fixedly connected with the top end of the piano rod through a piano shaft, the other end of the string is fixedly connected with the outer side of the bottom of the side panel, the bridge is arranged outside the front panel on two sides of the sound hole, and the string is lapped with the upper part of the bridge;

the device is characterized in that more than one resonance sub-box which is gradually reduced in equal proportion is sleeved in the resonance box; each resonance sub-box comprises a sub-box front panel and a sub-box side panel, and one side edge part of the sub-box side panel of each resonance sub-box is hermetically connected with the sub-box front panel of the resonance sub-box; the edge part of the other side of the sub-box side panel of each resonance sub-box is hermetically connected with the rear panel;

2. The stringed musical instrument with variable timbre according to claim 1, further comprising a sub-bridge corresponding to each of the resonator boxes, wherein the bridge corresponding to the resonator box and the sub-bridge corresponding to the resonator box are reduced in equal proportion from outside to inside.

3. A string instrument with variable timbre comprises a resonance box, a rod, a headstock, a bridge, strings and a bow, wherein the resonance box comprises a front panel, a side panel and a rear panel, the side edges of the two sides of the side panel are respectively hermetically connected with the front panel and the rear panel, and sound holes are formed in the front panel; the bottom end of the piano rod is fixedly connected with the outer side of the top of the side panel, one end of the string is fixedly connected with the top end of the piano rod through a piano shaft, the other end of the string is fixedly connected with the outer side of the bottom of the side panel, the bridge is arranged outside the front panel on two sides of the sound hole, and the string is lapped with the upper part of the bridge;

the device is characterized in that more than one resonance sub-box which is gradually reduced in equal proportion is sleeved in the resonance box; each resonance sub-box comprises a sub-box front panel, a sub-box side panel and a sub-box rear panel, and the two side edges of the sub-box side panel of each resonance sub-box are hermetically connected with the sub-box front panel and the sub-box rear panel of the resonance sub-box;

4. The stringed musical instrument of variable timbre according to claim 3, wherein said rear panel and said sub-case rear panel are sequentially fitted and fixedly connected; the electronic resonance box further comprises sub-bridge bodies correspondingly arranged with the resonance sub-boxes, and the bridge bodies corresponding to the resonance sub-boxes and the sub-bridge bodies corresponding to the resonance sub-boxes are reduced from outside to inside in equal proportion step by step.

5. The stringed musical instrument of claim 3, wherein the back plate and the sub-box back plate are sequentially attached and movably connected by a guide bar, the guide bar is fixedly disposed inside the back plate along the thickness direction of the resonator box, and the guide bar penetrates each sub-box back plate and is slidably connected to each resonator box; the resonance box is also connected with each resonance sub-box through a driving device;

6. The stringed musical instrument with variable timbre according to claim 5, wherein the driving means comprises a number of screws corresponding to the number of the resonator boxes, each screw has a stopper fixed to one end thereof, and a retainer is fixed to an opposite outer side of a back plate or a side plate of each resonator box, and each screw has one end thereof inserted into the retainer corresponding to the resonator box and rotatably connected to the retainer through the stopper; the other end of each screw rod penetrates through a sub-box rear panel of the resonator corresponding to the outer side of the resonator, and is in threaded connection with the rear panel.

7. The variable timbre stringed instrument as in claim 5, wherein the driving means comprises a number of cam mechanisms corresponding to the number of resonator boxes, each of the cam mechanisms comprises a cam and a U-shaped groove, the U-shaped groove is fixedly provided on the opposite outer side of the sub-box side panel of each resonator box, the cam is rotatably provided in each of the U-shaped grooves, and the wheel shaft of each cam penetrates through the cam corresponding to the sub-box side panel of the resonator box on the opposite outer side of the resonator box and is screwed to the side panel.

8. The stringed musical instrument with variable timbre according to any one of claims 1 to 7, wherein a damper groove is formed in the front panel and each of the front panels of the sub-cases along the length direction of the rod, the damper grooves are concentrically arranged, a damper rod is inserted into the damper groove, one end of the damper rod inserted into the damper groove is a polygonal guide rod, a positioning bar having a plate surface perpendicular to the damper rod is fixed to the polygonal guide rod, a slide bar is sleeved on the polygonal guide rod on the side close to the damper rod, the positioning bar and the slide bar are identical in the length direction, the length of the positioning bar and the slide bar is greater than the width of the damper groove, and the width of the positioning bar and the slide bar is smaller than the width of the damper groove;

9. A stringed musical instrument with variable timbre according to any one of claims 1 to 7, wherein the headstock is provided with a peg, the peg is provided with a hole, the peg is further provided with a bolt hole communicating with the hole, the headstock is connected to the peg by inserting the peg into the hole, and the peg is fixedly connected to the peg by a tightening bolt provided in the bolt hole.

10. The stringed musical instrument with variable timbre according to claim 8, wherein the headstock is provided with a plug rod, the rod is provided with a plug hole, the rod is further provided with a bolt hole communicating with the plug hole, the headstock is connected to the rod by inserting the plug rod into the plug hole, and the plug rod is fixedly connected to the plug rod by a tightening bolt provided in the bolt hole.