Pressing trigger type musical scale adjusting electric guitar

Abstract

The invention relates to the technical field of electric guitars, in particular to a pressing trigger type musical scale adjusting electric guitar which comprises a guitar head fixedly connected to a guitar body, a plurality of guitar strings connected between the guitar body and the guitar head, and a sleeve rod connected with the guitar body in a sleeving mode, and one end of each guitar string is wound on the guitar head, and the other end of each guitar string is clamped to the guitar body. The loop bar is fixedly connected to one side of the guitar body, the plurality of ejection blocks are rotatably connected to the loop bar, the plurality of torsional springs are wound on the loop bar, one end of each torsional spring is fixedly connected to the corresponding ejection block, and the other end of each torsional spring is fixedly connected to the adjacent ejection block. According to the invention, the string is cut open, and the torsional spring is converted from a force storage state to a pressure release state, so that the ejection block and the string are driven to move backwards and be pulled out, the broken string can be pushed out of the guitar body, an operator can pull out the string conveniently, and the string replacement efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric guitars, and particularly relates to a press-triggered scale-adjustable electric guitar. Background Art

[0002] An electric guitar is a plucked instrument that uses the principle of electromagnetism to produce sound. In order to maintain good intonation, timbre, and playing feel and to protect the guitar itself and extend its service life, it is necessary to replace the strings of the electric guitar when the strings age or break.

[0003] When the strings of an electric guitar age or break, the strings need to be replaced. First, the string to be replaced needs to be cut. The broken string will be divided into two sections. One section of the string will be wound around the headstock, and the other string will pass through the body of the guitar and be clamped to the rear side of the guitar. The operator needs to first remove the section of the string wound around the headstock. For the other section of the string, the operator needs to push it backward, and the string will move backward a small part from the body of the guitar. Then the operator can pull out the string by pulling the string that has moved backward. After removing the string, it is necessary to first pass the new string through the body of the guitar, and then wind the other end of the string around the headstock again to complete the replacement of the string. In the above operation, the string clamped to the body of the guitar needs to be first pushed out from the body of the guitar and then pulled out, which is time-consuming and laborious. Now, an invention of a press-triggered scale-adjustable electric guitar is provided, which can automatically push the broken string out of the body of the guitar, facilitating the operator to pull out the string and improving the efficiency of string replacement. Summary of the Invention

[0004] The present invention provides a press-triggered scale-adjustable electric guitar, which can automatically push the broken string out of the body of the guitar, facilitating the operator to pull out the string and improving the efficiency of string replacement, and is used to overcome the disadvantages that the string clamped to the body of the guitar needs to be first pushed out from the body of the guitar and then pulled out, which is time-consuming and laborious.

[0005] The technical solution is: a press-triggered scale-adjustable electric guitar, including a headstock, the headstock is fixedly connected to the body of the guitar, multiple strings are connected between the body of the guitar and the headstock, one end of the string is wound around the headstock, and the other end of the string is clamped to the body of the guitar. It further includes a sleeve rod, the sleeve rod is fixedly connected to one side of the body of the guitar, multiple ejecting blocks are rotatably connected to the sleeve rod, multiple torsion springs are wound around the sleeve rod, one end of the torsion spring is fixedly connected to the ejecting block, and the other end of the torsion spring is fixedly connected to the sleeve rod.

[0006] Further, the ejecting block is in clamping cooperation with the string.

[0007] Furthermore, it also includes an expansion mechanism for expanding the third and fourth strings, the expansion mechanism includes sliding rods, the sliding rods are symmetrically arranged and fixedly connected to the inside of the headstock, the expansion piece is slidably connected between the symmetrically arranged sliding rods, a square hole is opened on the headstock, the expansion piece slides in the square hole, the expansion piece is squeezed and matched with the third and fourth strings of the strings, the pull-up spring is wound on the sliding rods, one end of the pull-up spring is fixedly connected to the expansion piece, and the other end of the pull-up spring is fixedly connected to the headstock, and the limiting component is slidably connected to the headstock, and the limiting component is used to limit the expansion piece.

[0008] Furthermore, the limiting component includes a shift pin, which is slidably connected to one side of the headstock, a tension spring is wound around the shift pin, one end of the tension spring is fixedly connected to the shift pin, and the other end of the tension spring is fixedly connected to the headstock.

[0009] Furthermore, an inclined surface is provided on the shift latch, and the expansion member is extruded and matched with the inclined surface of the shift latch.

[0010] Furthermore, it also includes a limiting mechanism for limiting the strings, which includes a connecting rod, the connecting rod is fixedly connected to one side of the piano body, the limiting plate is slidably connected to the connecting rod, the return spring is wound on the connecting rod, one end of the return spring is fixedly connected to the limiting plate, the other end of the return spring is fixedly connected to the connecting rod, and a fixing assembly is fixedly connected to the piano body, and the fixing assembly is used to limit the limiting plate.

[0011] Furthermore, the locking assembly includes a limit rod, which is fixedly connected to the piano body, a limit pin which is slidably connected to the limit rod, the limit pin is engaged with the limit plate, a return spring is wound around the limit rod, one end of the return spring is fixedly connected to the limit rod, and the other end of the return spring is fixedly connected to the limit pin.

[0012] Furthermore, the limiting latch is provided with an inclined surface, and the inclined surface of the limiting latch is extruded and matched with the limiting plate.

[0013] Furthermore, it also includes an auxiliary mechanism for assisting the three strings and the four strings to be stretched and reset, the auxiliary mechanism includes a return member, the return member is slidably connected to the inside of the headstock, a linear spring is wound on the return member, one end of the linear spring is fixedly connected to the return member, the other end of the linear spring is fixedly connected to the headstock, a sliding groove is opened in the middle of the return member, the sliding block is slidably connected in the sliding groove of the return member, and the connecting member is rotatably connected to the inside of the headstock.

[0014] Furthermore, a small hole and a large hole are opened at both ends of the connecting piece, the sliding block is sleeved in the small hole of the connecting piece, the expansion piece is sleeved in the large hole of the connecting piece, the connecting piece is squeezed and matched with the expansion piece, and the connecting piece is squeezed and matched with the sliding block.

[0015] The effects achieved by the present invention are as follows:

[0016] 1. By cutting the string of the present invention, the torsion spring is transformed from a state of storing energy to a state of releasing pressure, thereby driving the ejecting block and the string to move backward and be pulled out. In this way, the broken string can be pushed out of the body of the instrument, facilitating the operator to extract the string and improving the efficiency of replacing the string.

[0017] 2. By the forward movement of the spreading member of the present invention, the third string and the fourth string are spread outward, and the spreading member is restricted by the gear pin. In this way, the position of the truss rod can be exposed, facilitating the operator to adjust the neck of the instrument.

[0018] 3. By the blocking plate of the present invention to block the string and the blocking plate is restricted by the blocking pin, when replacing a new string, the blocking plate can prevent the ejecting block from rotating and the torsion spring from releasing pressure. The operator does not need to keep pulling the string to counteract the force of the torsion spring, reducing the risk of the operator being cut by the string.

[0019] 4. When the spreading member moves forward in the present invention, the return member will move backward, and when the return member moves forward, the spreading member will move backward. In this way, after adjusting the neck of the instrument, by pushing the return member forward, the spreading member can quickly move backward and reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 is a three-dimensional structural schematic diagram of components such as the string, sleeve rod and ejecting block of the present invention.

[0022] Figure 3 is a three-dimensional structural schematic diagram of components such as the string, sleeve rod and torsion spring of the present invention.

[0023] Figure 4 is a three-dimensional structural schematic diagram of the sleeve rod, torsion spring and ejecting block of the present invention.

[0024] Figure 5 is a three-dimensional structural schematic diagram of components such as the spreading member, gear pin and tension spring of the present invention.

[0025] Figure 6 is a cross-sectional view of the three-dimensional structure of the headstock, spreading member and pulling spring of the present invention.

[0026] Figure 7 is a three-dimensional structural schematic diagram of the spreading member of the present invention.

[0027] Figure 8 is a three-dimensional structural schematic diagram of components such as the blocking plate, limiting rod and blocking pin of the present invention.

[0028] Figure 9Schematic three-dimensional structure diagram of the ejector block, limiting plate and limiting pin of the present invention.

[0029] Figure 10 Schematic cross-sectional view of the three-dimensional structure of components such as the return member, linear spring and connecting member of the present invention.

[0030] Figure 11 Schematic cross-sectional view of the three-dimensional structure of the return member, connecting member and sliding block of the present invention.

[0031] Names and serial numbers of components in the figure: 1 - guitar body, 11 - strings, 12 - headstock, 13 - sleeve rod, 14 - torsion spring, 15 - ejector block, 2 - spreading member, 21 - gear pin, 22 - tension spring, 23 - upward pull spring, 24 - sliding rod, 3 - limiting plate, 31 - limiting rod, 32 - limiting pin, 33 - return spring, 34 - return spring, 35 - connecting rod, 4 - return member, 41 - linear spring, 42 - connecting member, 43 - sliding block. Detailed implementation manners

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0033] Embodiment 1: A press-triggered scale-adjustable electric guitar, as Figures 1 - 4 shown, includes a guitar body 1, strings 11, a headstock 12, a sleeve rod 13, a torsion spring 14 and an ejector block 15. The headstock 12 is fixedly connected above the guitar body 1. Six strings 11 are connected between the guitar body 1 and the headstock 12. The upper ends of the strings 11 are all wound around the headstock 12, and the lower ends of the strings 11 are all clamped on the guitar body 1. The sleeve rod 13 is fixedly connected behind the guitar body 1. Six ejector blocks 15 are rotatably connected to the sleeve rod 13. The ejector block 15 is in clamping fit with the string 11. Six torsion springs 14 are all wound around the sleeve rod 13. One end of the torsion spring 14 is fixedly connected to the ejector block 15, and the other end of the torsion spring 14 is fixedly connected to the sleeve rod 13.

[0034] During the long-term use of the electric guitar, the strings 11 of the electric guitar will age, resulting in poor tone and slow response. At this time, new strings 11 need to be replaced. If the strings 11 are severely damaged, such as obvious wear or breakage, they also need to be replaced in time. In addition, different string 11 materials and thicknesses will affect the tone and playing feel of the guitar. Players may replace the strings 11 according to personal preferences and playing needs to adjust the tone. When the strings 11 need to be replaced, first use scissors to cut the strings 11. When the strings 11 are not disconnected, as Figure 1 and as Figure 3As shown in the figure, the upper end of the string 11 is wound around the tuning head 12, and the lower end of the string 11 is clamped on the ejector block 15. At this time, the torsion spring 14 is in a state of storing energy. When the string 11 is cut, the string 11 will break into two upper and lower segments. The upper string 11 will be wound around the tuning head 12, and the operator can wind it out and remove it. Because the string 11 is broken, the string 11 no longer pulls the ejector block 15 forward. At this time, the torsion spring 14 in the state of storing energy will be converted into a state of releasing pressure. The conversion of the torsion spring 14 into a state of releasing pressure will drive the ejector block 15 to rotate backward. Because the ejector block 15 is clamped with the string 11, the rotation of the ejector block 15 will drive the lower segment of the string 11 to move backward. The backward movement of the lower string 11 will pull out a section from the body 1 of the instrument. When the string 11 is moved out a section, the operator can hold the string 11 that has been pulled out backward and pull it out completely. After the string 11 is pulled out, the lower end of the new string 11 can be re-clamped on the ejector block 15, and the upper end of the string 11 can be passed through the body 1 of the instrument to straighten the string 11. When the string 11 is re-straightened, the string 11 will drive the ejector block 15 to rotate forward and reset, and the torsion spring 14 will be in a state of storing energy again. Then the upper end of the string 11 can be re-wound around the tuning head 12. In this way, the replacement of the string 11 can be completed. Through the above operations, the broken string 11 can be pushed out of the body 1 of the instrument, which is convenient for the operator to pull out the string 11 from the body 1 of the instrument and improves the efficiency of replacing the string 11.

[0035] Embodiment 2: On the basis of Embodiment 1, as Figures 5 - 7 shown, it further includes a spreading mechanism for spreading the third string and the fourth string. The spreading mechanism includes a spreading member 2, a gear shifting pin 21, a tension spring 22, an upward pulling spring 23 and a sliding rod 24. The gear shifting pin 21 is slidably connected to the left side of the tuning head 12. The gear shifting pin 21 is provided with an inclined surface. The tension spring 22 is wound around the gear shifting pin 21. One end of the tension spring 22 is fixedly connected to the gear shifting pin 21, and the other end of the tension spring 22 is fixedly connected to the tuning head 12. Two sliding rods 24 are fixedly connected inside the tuning head 12. The spreading member 2 is slidably connected between the two sliding rods 24. The spreading member 2 is in extrusion cooperation with the inclined surface of the gear shifting pin 21. A square hole is opened on the tuning head 12. The spreading member 2 slides in the square hole. The spreading member 2 is in extrusion cooperation with the third string and the fourth string of the string 11. The upward pulling springs 23 are all wound around the sliding rods 24. One end of each upward pulling spring 23 is fixedly connected to the spreading member 2, and the other end of each upward pulling spring 23 is fixedly connected to the tuning head 12.

[0036] The neck extends downward from the headstock 12 and is a slender structural part of the body 1. The fingerboard is supported on the neck, enabling the guitar to maintain the correct tension and tone during playing. The basic function of the neck is to provide a playable fingerboard and to provide the tension to support the strings 11. Generally, the strings 11 exert a relatively large pulling force on the neck. If the pulling force of the strings 11 used is too large or the strings 11 are not replaced for a long time, resulting in the aging and tension change of the strings 11, the neck will gradually deform under such a long-term pulling force. In addition, if the guitar is often stood upright against a wall with the neck leaning against the wall, the neck is prone to deformation due to the long-term compression of the body weight. Moreover, long-term placement in high-temperature, strong-light or cold environments, such as being directly exposed to sunlight in summer or in the cold outdoors in winter, will also damage the wooden structure of the neck, and the neck is also prone to deformation. The deformation of the neck will affect the intonation during playing and the player's touch on the strings 11. When the neck is deformed, a specific tool is needed to adjust the truss rod on the headstock 12 to make the neck straight again, so as to avoid the excessive bending of the neck affecting the playing effect. As Figure 5 shown, the truss rod is arranged inside the headstock 12, and the communication port of the truss rod with the outside is between the third string and the fourth string. When adjusting the truss rod, it is necessary to first push the third string and the fourth string to the left and right sides to expose the position where the truss rod is located, so as to facilitate the operator to adjust it. Therefore, a spreading mechanism is provided to spread the third string and the fourth string. The working principle of the spreading mechanism is as follows: The operator first moves the gear pin 21 outward, and the tension spring 22 will be stretched. At this time, the upward-pulling spring 23 in the compressed state will elongate. The elongation of the upward-pulling spring 23 will drive the spreading member 2 to move forward. The forward movement of the spreading member 2 will spread the third string and the fourth string to the outside. After the third string and the fourth string are spread, the operator can release the gear pin 21. At this time, the elongated tension spring 22 will contract, and the contraction of the tension spring 22 will drive the gear pin 21 to move inward and reset. Then the operator can use a specific tool to adjust the truss rod to make the neck straight again. After adjusting the neck, the operator can press the front side of the spreading member 2 downward, so that the spreading member 2 moves backward and resets. During the backward movement of the spreading member 2, it will squeeze the inclined surface of the gear pin 21. Under the squeezing action of the spreading member 2, the gear pin 21 will move outward, and the tension spring 22 will be stretched. After the spreading member 2 moves downward and resets, the spreading member 2 will no longer squeeze the gear pin 21, and the elongated tension spring 22 will contract. The contraction of the tension spring 22 will drive the gear pin 21 to move inward and reset. The inward movement of the gear pin 21 will re-lock the spreading member 2. In this way, the third string and the fourth string can be quickly spread to the outside, facilitating the operator to adjust the neck.

[0037] As Figure 8 and Figure 9As shown in the figure, it further includes a limiting mechanism for restricting the string 11. The limiting mechanism includes a limiting plate 3, a limiting rod 31, a limiting pin 32, a return spring 33, a return spring 34 and a connecting rod 35. The connecting rod 35 is fixedly connected to the rear of the body 1. The limiting plate 3 is slidably connected to the connecting rod 35. The return spring 34 is wound around the connecting rod 35. One end of the return spring 34 is fixedly connected to the limiting plate 3, and the other end of the return spring 34 is fixedly connected to the connecting rod 35. The limiting rod 31 is fixedly connected to the rear side of the body 1. The limiting pin 32 is slidably connected to the limiting rod 31. An inclined surface is provided on the limiting pin 32. The inclined surface of the limiting pin 32 is in pressing fit with the limiting plate 3. The limiting pin 32 is in snap fit with the limiting plate 3. The return spring 33 is wound around the limiting rod 31. One end of the return spring 33 is fixedly connected to the limiting rod 31, and the other end of the return spring 33 is fixedly connected to the limiting pin 32.

[0038] As described above, when the string 11 needs to be replaced, the ejecting block 15 will drive the string 11 to rotate backward together, and the string 11 will be pulled out from the back. At this time, the torsion spring 14 is already in a pressure-relieved state. After the broken string 11 is pulled out, it is necessary to first reconnect the lower end of the new string 11 to the ejecting block 15, then tighten the string 11, and rewind the upper end of the string 11 around the tuning head 12. In the above operations, the torsion spring 14 in a pressure-relieved state is re-energized by pulling the string 11. After the torsion spring 14 is re-energized, the operator still needs to use a relatively large force to pull the string 11 to prevent the torsion spring 14 from returning to the pressure-relieved state. While the operator uses a relatively large force to pull the string 11, the upper end of the string 11 also needs to be wound around the tuning head 12. The whole process consumes a lot of manpower. And because the strings 11 of an electric guitar are usually made of nickel-iron alloy, this alloy has a high hardness, a smooth surface, and is easy to scratch the skin. When pulling the string 11 with a relatively large force for a long time, the operator is easily cut by the string 11. Therefore, a limiting mechanism for restricting the string 11 is provided. The working principle of the limiting mechanism is as follows: As Figure 8As shown, in the initial state, the return spring 34 is in a natural elongation state, and the limiting plate 3 blocks the headstock 12. When the string 11 needs to be cut, the operator pushes the limiting plate 3 upward, and the return spring 34 will be compressed. When the limiting plate 3 moves upward, it will squeeze the inclined surface of the limiting pin 32. Under the squeezing action of the limiting plate 3, the limiting pin 32 will move to the right, and the return spring 33 will be stretched. When the limiting plate 3 moves upward to the uppermost position and no longer blocks the string 11 and the ejector block 15, the limiting plate 3 no longer squeezes the inclined surface of the limiting pin 32, and the return spring 33 will contract. The contraction of the return spring 33 will drive the limiting pin 32 to move to the left, and the limiting pin 32 moves to the left to lock the limiting plate 3. The limiting pin 32 can limit the limiting plate 3 above. Then the string 11 can be cut, and the ejector block 15 drives the string 11 to move backward. When replacing the new string 11, the string 11 is clamped into the ejector block 15, and the string 11 is pulled to reset the ejector block 15, and the torsion spring 14 is in a pre-loaded state again. At the same time, the operator needs to pull the limiting pin 32 to the right, the return spring 33 elongates, the limiting pin 32 moves to the right and no longer restricts the limiting plate 3, and the compressed return spring 34 will elongate. The return spring 34 will drive the limiting plate 3 to move downward, and the limiting plate 3 moving downward will block the string 11 and the ejector block 15 again. The ejector block 15 will be restricted by the limiting plate 3, and the torsion spring 14 cannot drive the ejector block 15 to rotate. At this time, when the operator pulls the string 11, there is no need to overcome the force of the torsion spring 14 releasing pressure. The operator can use less force to pull the string 11 to make the string 11 at the required tightness. Then the upper end of the string 11 is wound around the headstock 12. Through the above operations, the ejector block 15 can be restricted, so that when the upper end of the string 11 is wound around the headstock 12, there is no need to continuously pull the string 11 with a large force, which saves time and effort, and at the same time can reduce the risk of the operator being cut by the string 11.

[0039] As Figure 10 and 11 shown, it further includes an auxiliary mechanism for assisting the three-string and four-string to expand and reset. The auxiliary mechanism includes a return member 4, a linear spring 41, a connecting member 42, and a sliding block 43. The return member 4 is slidably connected inside the headstock 12. The linear spring 41 is wound around the return member 4. One end of the linear spring 41 is fixedly connected to the return member 4, and the other end of the linear spring 41 is fixedly connected to the headstock 12. A chute is provided in the middle of the return member 4, and the sliding block 43 is slidably connected in the chute of the return member 4. The connecting member 42 is rotatably connected inside the headstock 12. Two holes of different sizes are provided at both ends of the connecting member 42. The sliding block 43 is sleeved in the small hole of the connecting member 42, and the spreading member 2 is sleeved in the large hole of the connecting member 42. The connecting member 42 is in extrusion fit with the spreading member 2, and the connecting member 42 is in extrusion fit with the sliding block 43.

[0040] As described above, when the neck needs to be adjusted, after the gear pin 21 no longer restricts the spreading member 2, the spreading member 2 will move forward to spread the third string and the fourth string apart. Then, the operator can use a specific tool to adjust the truss rod on the headstock 12 to straighten the deformed neck. After adjusting the neck, finally, the operator presses the spreading member 2 backward to reset the spreading member 2. When the operator presses the spreading member 2 downward, the strings 11 will quickly move inward to reset. At this time, the operator's fingers are still between the third string and the fourth string, and the movement of the strings 11 to reset is likely to cut the operator. Therefore, an auxiliary mechanism for assisting the reset of the spreading member 2 is provided, and the working principle of the auxiliary mechanism is as follows: When the spreading member 2 moves forward, the spreading member 2 will drive the connecting member 42 to rotate clockwise. The clockwise rotation of the connecting member 42 will squeeze the sliding block 43, and the sliding block 43 will move backward. The backward movement of the sliding block 43 will drive the return member 4 to move backward as well, and the linear spring 41 will be stretched. After adjusting the neck, the operator can press the rear end of the return member 4, and the return member 4 will move forward. The linear spring 41 will contract and reset. The forward movement of the return member 4 will squeeze the sliding block 43, and the sliding block 43 will also move forward. The forward movement of the sliding block 43 will drive the connecting member 42 to rotate counterclockwise. The counterclockwise rotation of the connecting member 42 will drive the spreading member 2 to move downward to reset. The spreading member 2 moving downward no longer presses the third string and the fourth string, and the third string and the fourth string will move inward to reset. In this way, the reset of the spreading member 2 can be achieved by pressing the return member 4.

[0041] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A push-trigger scale-adjustable electric guitar, comprising a headstock (12), the headstock (12) being fixedly connected to a body (1), a plurality of strings (11) being connected between the body (1) and the headstock (12), one end of the string (11) being wound around the headstock (12), and the other end of the string (11) being clamped on the body (1), wherein: The instrument further comprises a sleeve rod (13), the sleeve rod (13) being fixedly connected to one side of the instrument body (1), a plurality of ejection blocks (15) being rotatably connected to the sleeve rod (13), a plurality of torsion springs (14) being wound around the sleeve rod (13), one end of the torsion spring (14) being fixedly connected to the ejection block (15), and the other end of the torsion spring (14) being fixedly connected to the sleeve rod (13).

2. A push-trigger scale-adjustable electric guitar according to claim 1, characterized in that: The ejection block (15) is engaged with the strings (11).

3. A push-trigger scale-adjustable electric guitar according to claim 2, characterized in that: The instrument also includes a spreading mechanism for spreading the third and fourth strings, the spreading mechanism including a sliding rod (24), the sliding rods (24) being symmetrically arranged and fixedly connected to the inside of the headstock (12), a spreading member (2) being slidably connected between the symmetrically arranged sliding rods (24), a square hole being opened on the headstock (12), the spreading member (2) sliding in the square hole, the spreading member (2) being squeezed and matched with the third and fourth strings of the strings (11), an upper pull spring (23) being wound on the sliding rod (24), one end of the upper pull spring (23) being fixedly connected to the spreading member (2), the other end of the upper pull spring (23) being fixedly connected to the headstock (12), a limiting component being slidably connected to the headstock (12), the limiting component being used to limit the spreading member (2).

4. A push-trigger scale-adjustable electric guitar according to claim 3, characterized in that: The limiting component comprises a shift latch (21), the shift latch (21) is slidably connected to one side of the headstock (12), a tension spring (22) is wound around the shift latch (21), one end of the tension spring (22) is fixedly connected to the shift latch (21), and the other end of the tension spring (22) is fixedly connected to the headstock (12).

5. A push-trigger scale-adjustable electric guitar according to claim 4, characterized in that: The shift latch (21) is provided with an inclined surface, and the expansion member (2) is pressed and matched with the inclined surface of the shift latch (21).

6. The push-trigger scale-adjustable electric guitar according to claim 5, characterized in that: The instrument also includes a limiting mechanism for limiting the strings (11), the limiting mechanism including a connecting rod (35), the connecting rod (35) being fixedly connected to one side of the instrument body (1), a limiting plate (3) being slidably connected to the connecting rod (35), a return spring (34) being wound around the connecting rod (35), one end of the return spring (34) being fixedly connected to the limiting plate (3), the other end of the return spring (34) being fixedly connected to the connecting rod (35), a locking assembly being fixedly connected to the instrument body (1), and the locking assembly being used to limit the limiting plate (3).

7. The push-trigger scale-adjustable electric guitar according to claim 6, characterized in that: The locking assembly comprises a limit rod (31), the limit rod (31) is fixedly connected to the piano body (1), a limit pin (32) is slidably connected to the limit rod (31), the limit pin (32) is engaged with the limit plate (3), a return spring (33) is wound on the limit rod (31), one end of the return spring (33) is fixedly connected to the limit rod (31), and the other end of the return spring (33) is fixedly connected to the limit pin (32).

8. The push-trigger scale-adjustable electric guitar according to claim 7, characterized in that: The limiting latch (32) is provided with an inclined surface, and the inclined surface of the limiting latch (32) is pressed and matched with the limiting plate (3).

9. The push-trigger scale-adjustable electric guitar according to claim 8, characterized in that: The invention also comprises an auxiliary mechanism for assisting the three strings and the four strings to be stretched and reset, the auxiliary mechanism comprising a return member (4), the return member (4) is slidably connected to the inside of the headstock (12), a linear spring (41) is wound on the return member (4), one end of the linear spring (41) is fixedly connected to the return member (4), the other end of the linear spring (41) is fixedly connected to the headstock (12), a sliding groove is provided in the middle of the return member (4), a sliding block (43) is slidably connected in the sliding groove of the return member (4), and a connecting member (42) is rotatably connected to the inside of the headstock (12).

10. The push-trigger scale-adjustable electric guitar according to claim 9, characterized in that: The two ends of the connecting member (42) are provided with a small hole and a large hole, the sliding block (43) is sleeved in the small hole of the connecting member (42), the opening member (2) is sleeved in the large hole of the connecting member (42), the connecting member (42) and the opening member (2) are pressed together, and the connecting member (42) and the sliding block (43) are pressed together.

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