Sound amplifying device for musical instrument playing

Abstract

The invention relates to the technical field of sound amplification equipment, and discloses a sound amplification device for musical instrument playing, which comprises a loudspeaker and a receiver, and is characterized in that the bottom of the loudspeaker is fixedly provided with a hemispherical block. According to the invention, when the loudspeaker is knocked off and the hemisphere block is in contact with the ground firstly, the loudspeaker can be adjusted to be in a vertical state by virtue of the gravity of the hemisphere block, and when the part, far away from the hemisphere block, of the loudspeaker is in contact with the ground firstly and then the side surface of the hemisphere block is in contact with the ground, the loudspeaker can be adjusted to be in a vertical state by canceling positioning of the shifting plate. Through cooperation with the torsion of a first torsion spring, a stirring plate enables the loudspeaker to rotate upwards with a hemispherical block as a fulcrum, so that the loudspeaker leaves water, and then through cooperation with the gravity effect borne by the hemispherical block, the loudspeaker is adjusted to be in a vertical state, so that the loudspeaker can be prevented from being damaged by water, the loudspeaker is protected, and through cleaning of a net cylinder, the practicability is high. The situation that resetting of the piston is affected by blocking of the net cylinder, and then the whole loudspeaker protection process is affected is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of sound amplification equipment, and particularly relates to a sound amplification device for musical instrument performance. Background Art

[0002] Musical instruments are tools for humans to use material objects to produce vibrating sounds to express and communicate thoughts and feelings. There are more than 40,000 kinds of musical instruments in various regions and ethnic groups of the ancient and modern world. These musical instruments are not only used in the field of music but also commonly used in production labor occasions.

[0003] When performing a water-based performance of an orchestral instrument, it is necessary to install a microphone on the instrument to amplify the sound of the instrument. When performing on water, the ground will be covered with a thin layer of water, and the environment beauty can be enhanced by cooperating with lights. The user performs in the water. When using the microphone, if the microphone is accidentally knocked off and cannot be picked up in time, the microphone is easily damaged when soaked in water, which affects the use.

[0004] Therefore, it is very necessary to invent a sound amplification device for musical instrument performance to solve the above problems. Summary of the Invention

[0005] In view of the above problems, the present invention provides a sound amplification device for musical instrument performance to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A sound amplification device for musical instrument performance, including a microphone and a receiver. A hemispherical block is fixedly installed at the bottom of the microphone. Side plates are symmetrically and fixedly installed at the top of the hemispherical block. Installation openings are provided on both sides of the side plates. A toggle plate is provided in the installation openings. Circular holes are symmetrically provided inside the installation openings. Rotating shafts are fixedly installed on both sides of the toggle plate. One end of the rotating shaft is rotatably installed on the inner wall of the corresponding circular hole. A first torsion spring is sleeved on the outside of the rotating shaft. Both ends of the first torsion spring are fixedly connected to the inner wall of the circular hole and the rotating shaft respectively. A positioning component is provided outside the toggle plate for positioning it.

[0007] Further, the positioning component includes a clamping rod. Arc-shaped holes are provided at both ends of the side plate. A positioning hole is provided on the side of the toggle plate close to the arc-shaped hole. An arc-shaped groove is provided on the inner wall of the arc-shaped hole. A slider is slidably installed in the arc-shaped groove. The clamping rod is arranged in the arc-shaped hole. The clamping rod is fixedly connected to the slider. The side of the slider away from the toggle plate is fixedly connected to the inner wall of the arc-shaped groove through a first spring. One end of the clamping rod extends into the positioning hole. An iron block is fixedly installed at the end of the clamping rod away from the toggle plate. First electromagnets are symmetrically and fixedly installed at the top of the hemispherical block. The first electromagnets are located between adjacent side plates. A control component is provided on the hemispherical block for controlling the first electromagnets to be energized.

[0008] Furthermore, the control component includes an airbag, which is made of rubber and has a ring shape. An annular groove is provided on the outer side of the hemispherical block, and the airbag is fixedly installed in the annular groove. The top of the airbag is flush with the top of the hemispherical block, and the top of the hemispherical block is provided with a channel connected to the annular groove. A catheter is provided in the channel, and one end of the catheter is connected to the airbag. A pipe corresponding to the channel opening is fixedly installed on the top of the hemispherical block, and a piston is slidably installed inside the pipe. A top plate is fixedly installed on the top of the pipe, and an air hole is provided on the top plate. The piston is fixedly connected to the top plate through a second spring, and a switch is fixedly installed on the middle part of the bottom end of the top plate. The switch is a waterproof press switch, and an anti-blocking component for preventing the air hole from being blocked is provided above the top plate. The switch is used to control the power on and off of the first electromagnet.

[0009] Furthermore, the anti-blocking component includes a mesh cylinder arranged on the top of the pipeline, and a swinging component for driving the mesh cylinder to swing is provided on the outside of the mesh cylinder.

[0010] Furthermore, the swinging assembly includes a pull rod fixedly mounted on the outside of the mesh cylinder, the pull rod is made of iron, a second electromagnet is fixedly mounted on the top of the pipe, a groove is opened on the top of the pipe, the groove is circular in shape, the bottom of the mesh cylinder is rotatably mounted on the bottom wall of the groove, a second torsion spring is sleeved on the outside of the mesh cylinder, the two ends of the second torsion spring are respectively fixedly connected to the bottom wall of the groove and the outside of the mesh cylinder, and a controller is fixedly mounted on the top of the hemispherical block, which cooperates with a switch to control the power on and off of the second electromagnet.

[0011] Furthermore, the weight of the hemispherical block is greater than the sum of all components installed above it.

[0012] Furthermore, when the toggle plate contacts the ground, the torsion of the first torsion spring is sufficient to drive all components above the hemispherical block to move away from the ground. When the toggle plate stops rotating, the angle between the bottom of the toggle plate and the top of the hemispherical block is 140 degrees.

[0013] Furthermore, the mesh holes of the mesh cylinder are opened on the side surface thereof.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention can adjust the loudspeaker to a vertical position by virtue of the gravity exerted on the hemispherical block when the loudspeaker is knocked off and contacts the ground first. When the portion of the loudspeaker away from the hemispherical block contacts the ground first and then the side of the hemispherical block contacts the ground, the toggle plate is released from its position and the torsion force of the first torsion spring causes the toggle plate to rotate the loudspeaker upward with the hemispherical block as a fulcrum, thereby removing the loudspeaker from the water. Subsequently, the gravity exerted on the hemispherical block adjusts the loudspeaker to a vertical position, thereby preventing the loudspeaker from being damaged by water and protecting the loudspeaker.

[0016] 2. The present invention filters impurities through the mesh tube to avoid clogging of the pores. After leaving the water surface and the piston is reset, the swinging component can swing the mesh tube to throw off the impurities and clean the mesh tube, thereby avoiding clogging of the mesh tube and affecting the reset of the piston, thereby affecting the entire loudspeaker protection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a sound amplifying device for playing a musical instrument according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic structural diagram of a loudspeaker according to an embodiment of the present invention is shown;

[0019] Figure 3 The embodiment of the present invention is shown Figure 2 A in the middle is an enlarged structural diagram;

[0020] Figure 4 The embodiment of the present invention is shown Figure 1 The enlarged structural diagram at B in the middle;

[0021] Figure 5 A schematic cross-sectional view of a loudspeaker according to an embodiment of the present invention is shown;

[0022] Figure 6 The embodiment of the present invention is shown Figure 5 Enlarged structural diagram at point C in the middle.

[0023] In the figure: 1. loudspeaker; 2. hemispherical block; 3. toggle plate; 4. rotating shaft; 5. first torsion spring; 6. positioning hole; 7. iron block; 8. clamping rod; 9. slider; 10. first spring; 11. first electromagnet; 12. catheter; 13. airbag; 14. pipe; 15. piston; 16. top plate; 17. air hole; 18. switch; 19. second spring; 20. mesh tube; 21. pull rod; 22. second electromagnet; 23. second torsion spring; 24. controller; 25. side panel; 26. receiver. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0025] The present invention provides a sound reinforcement device for musical instrument performance, as Figures 1 to 6 shown, which includes a microphone 1 and a receiver 26. The microphone 1 and the receiver 26 are wireless microphones and receivers for musical instrument performance in the prior art. A hemispherical block 2 is fixedly installed at the bottom of the microphone 1. Side plates 25 are symmetrically and fixedly installed at the top of the hemispherical block 2. Installation openings are provided on both sides of the side plates 25. A toggle plate 3 is arranged in the installation openings. Circular holes are symmetrically provided inside the installation openings. Rotating shafts 4 are fixedly installed on both sides of the toggle plate 3. One end of each rotating shaft 4 is rotatably installed on the inner wall of the corresponding circular hole. A first torsion spring 5 is sleeved outside the rotating shaft 4. Both ends of the first torsion spring 5 are fixedly connected to the inner wall of the circular hole and the rotating shaft 4 respectively. A positioning component is provided outside the toggle plate 3 for positioning it.

[0026] During use, the receiver 26 is inserted into the sound system, and the microphone 1 is clamped on the musical instrument through its own clamping plate. During performance, the sound of the music is picked up by the microphone of the microphone 1 and transmitted to the receiver 26, and then played through the sound system to achieve sound reinforcement for the musical instrument. When a water-based musical instrument concert is held, the ground is level and covered with a thin layer of water. The height of the hemispherical block 2 is greater than the depth of the water. If the microphone 1 is accidentally knocked off, most of the knocked-off microphone 1 on the ground is soaked in water and is prone to damage. Therefore, when the microphone 1 is accidentally knocked off, if the hemispherical block 2 contacts the ground first, at this time, due to the center of gravity of the hemispherical block 2 being at its bottom, under the action of gravity, the hemispherical block 2 drives the microphone 1 to gradually swing until the microphone 1 is in a vertical state, so that the microphone 1 and its built-in microphone are away from the water on the ground, thus avoiding the microphone 1 and the microphone being damaged by water. If, during the fall, the part of the microphone 1 away from the hemispherical block 2 contacts the ground first, and then the side surface of the hemispherical block 2 contacts the ground, at this time, the positioning component is triggered to cancel the positioning of the toggle plate 3, and the first torsion spring 5 with torsional deformation releases the acting force to drive the rotating shaft 4 and the toggle plate 3 to rotate, so that the toggle plate 3 abuts against the ground, so as to support the entire microphone 1, and the microphone 1 rotates upward with the hemispherical block 2 as the fulcrum, so that the microphone 1 leaves the water. Subsequently, with the gravity acting on the hemispherical block 2, the microphone 1 is adjusted to a vertical state, so as to avoid the microphone 1 being damaged by water and realize the protection of the microphone 1. Then, the microphone 1 is picked up, the toggle plate 3 is rotated to reset it, driving the rotating shaft 4 to twist the first torsion spring 5 to generate torsional deformation and acting force, and then the positioning of the toggle plate 3 by the positioning component is restored. By putting away the toggle plate 3, the unfolded toggle plate 3 is prevented from affecting the use. Subsequently, the microphone 1 is fixed again to complete the installation of the microphone 1.

[0027] As Figures 1 to 6As shown, the positioning assembly includes a clamping rod 8, arc-shaped holes are provided at both ends of the side plate 25, a positioning hole 6 is provided on the side of the toggle plate 3 close to the arc-shaped hole, an arc-shaped groove is provided on the inner wall of the arc-shaped hole, a slider 9 is slidably installed in the arc-shaped groove, the clamping rod 8 is set in the arc-shaped hole, the clamping rod 8 is fixedly connected to the slider 9, and the side of the slider 9 away from the toggle plate 3 is fixedly connected to the inner wall of the arc-shaped groove through a first spring 10, one end of the clamping rod 8 extends into the positioning hole 6, and an iron block 7 is fixedly installed on the end of the clamping rod 8 away from the toggle plate 3, and a first electromagnet 11 is symmetrically fixedly installed on the top of the hemispherical block 2, the first electromagnet 11 is located between adjacent side plates 25, and a control assembly for controlling the power supply of the first electromagnet 11 is provided on the hemispherical block 2.

[0028] When the part of the loudspeaker 1 away from the hemispherical block 2 first contacts the ground, and then the side of the hemispherical block 2 contacts the ground, the control component controls the first electromagnet 11 to be energized to make it magnetic, so that the iron block 7 is attracted to move with the clamping rod 8 and the slider 9, and the slider 9 compresses the first spring 10 to deform it and generate a force. Finally, the iron block 7 is adsorbed and fixed to the first electromagnet 11, and the clamping rod 8 leaves the positioning hole 6, canceling the positioning of the toggle plate 3. Conversely, the toggle plate 3 is reset, and the control component cancels the power to the first electromagnet 11. At this time, the first electromagnet 11 loses its adsorption and fixation on the iron block 7, and the first spring 10 releases its force to reset the slider 9 and the clamping rod 8, and enters the positioning hole 6 to restore the positioning of the toggle plate 3.

[0029] like Figures 5 to 6 As shown, the control component includes an airbag 13, which is made of rubber and has a ring shape. An annular groove is provided on the outer side of the hemispherical block 2. The airbag 13 is fixedly installed in the annular groove. The top of the airbag 13 is flush with the top of the hemispherical block 2. A channel connected to the annular groove is provided on the top of the hemispherical block 2. A conduit 12 is provided in the channel. One end of the conduit 12 is connected to the airbag 13. A pipe 14 corresponding to the channel opening is fixedly installed on the top of the hemispherical block 2. A piston 15 is slidably installed inside the pipe 14. A top plate 16 is fixedly installed on the top of the pipe 14. An air hole 17 is provided on the top plate 16. The piston 15 is fixedly connected to the top plate 16 by a second spring 19. A switch 18 is fixedly installed on the middle part of the bottom end of the top plate 16. The switch 18 is a waterproof press switch. An anti-blocking component for preventing the air hole 17 from being blocked is provided above the top plate 16. The switch 18 is used to control the power on and off of the first electromagnet 11.

[0030] The part of the loudspeaker 1 away from the hemispherical block 2 first contacts the ground, and then the side of the hemispherical block 2 contacts the ground. At this time, the airbag 13 is squeezed, causing the air inside it to be squeezed outwards. At this time, the air pushes the piston 15 to move towards the direction close to the push switch 18, and at the same time compresses the second spring 19 to deform and generate a force. Then the piston 15 squeezes the push switch 18 to press it. At this time, the first electromagnet 11 is energized and has magnetism. When the airbag 13 leaves the ground, it returns to its original state, sucks the air back, and at this time the second spring 19 releases the force and drives the piston 15 to reset and leave the switch 18, and the switch 18 resets, and the first electromagnet 11 is de-energized and loses magnetism.

[0031] As Figure 6 shown, the anti-blocking component includes a net cylinder 20 arranged on the top of the pipeline 14, and a shaking component for driving the net cylinder 20 to shake is arranged outside the net cylinder 20.

[0032] When the part of the loudspeaker 1 away from the hemispherical block 2 first contacts the ground, and then the side of the hemispherical block 2 contacts the ground, at this time, some impurities in the water will adhere to the air holes 17. In the long run, it will cause the air holes 17 to be blocked. When the air holes 17 are blocked, the piston 15 cannot move, which will further cause the first electromagnet 11 to be unable to be energized, affecting the use. Therefore, during use, the net cylinder 20 filters the impurities to avoid blocking of the air holes 17. After leaving the water surface and the piston 15 resets, the shaking component can shake the net cylinder 20 to shake off the impurities and clean the net cylinder 20 to avoid blocking of the net cylinder 20 and affecting the use.

[0033] As Figure 3 and Figure 6 shown, the shaking component includes a pull bar 21 fixedly installed on the outside of the net cylinder 20. The material of the pull bar 21 is iron. A second electromagnet 22 is fixedly installed on the top of the pipeline 14. A groove is opened on the top of the pipeline 14. The shape of the groove is circular. The bottom of the net cylinder 20 is rotatably installed on the bottom wall of the groove. A second torsion spring 23 is sleeved outside the net cylinder 20. The two ends of the second torsion spring 23 are respectively fixedly connected with the bottom wall of the groove and the outside of the net cylinder 20. A controller 24 for cooperating with the switch 18 to control the energization and de-energization of the second electromagnet 22 is fixedly installed on the top of the hemispherical block 2.

[0034] When the airbag 13 leaves the ground, the piston 15 is reset and the switch 18 is not pressed. After 3S, the controller 24 is cooperated to control the second electromagnet 22 to be repeatedly powered on and off three times. When the second electromagnet 22 is powered on, the attraction strip 21 is made to rotate with the net tube 20, and the second torsion spring 23 is twisted to cause it to be twisted and deformed. When the second electromagnet 22 is powered off, the second torsion spring 23 releases the force to rotate and reset the net tube 20 quickly. During the rotation, the impurities on the surface of the net tube 20 are thrown outward, so that the impurities are separated from the net tube 20. By continuously powering on and off the second electromagnet 22, the net tube 20 can be continuously swung, and then cleaned.

[0035] like Figure 1 As shown, the weight of the hemispherical block 2 is greater than the sum of all components installed above it.

[0036] The hemispherical block 2 can rely on its own gravity to drive the loudspeaker 1 above it to a vertical state.

[0037] like Figure 1 As shown, when the toggle plate 3 contacts the ground, the torsion force of the first torsion spring 5 is sufficient to drive all components above the hemispherical block 2 to move away from the ground. When the toggle plate 3 stops rotating, the angle between the bottom of the toggle plate 3 and the top of the hemispherical block 2 is 140 degrees.

[0038] like Figure 3 and Figure 6 As shown, the mesh holes of the mesh cylinder 20 are opened on its side.

[0039] When the net cylinder 20 is swung, impurities on the side thereof can be swung away from the net cylinder 20 , thereby achieving cleaning of the net cylinder 20 .

[0040] Working principle: When in use, insert the receiver 26 into the speaker and clamp the loudspeaker 1 on the musical instrument through its own clamping plate. When playing, the music is picked up by the microphone of the loudspeaker 1, transmitted to the receiver 26, and then released through the speaker to achieve the sound amplification of the instrument. When holding a water instrument concert, the ground is level and covered with a thin layer of water. The height of the hemispherical block 2 is greater than the depth of the water. If the loudspeaker 1 is accidentally knocked off, most of the loudspeaker 1 that falls on the ground will be soaked in water, which is easy to cause Therefore, when the loudspeaker 1 is accidentally knocked off, if the hemispherical block 2 contacts the ground first, at this time, since the center of gravity of the hemispherical block 2 is at its bottom, under the action of gravity, the hemispherical block 2 gradually swings with the loudspeaker 1 until the loudspeaker 1 is in a vertical state, so that the loudspeaker 1 and its built-in microphone are away from the water on the ground, thereby preventing the loudspeaker 1 and the microphone from being damaged by water. If, when dropped, the part of the loudspeaker 1 away from the hemispherical block 2 contacts the ground first, and then the side of the hemispherical block 2 contacts the ground, at this time the airbag 13 is squeezed, so that the air inside it is squeezed out. At this time, the air pushes the piston 15 to move it in the direction close to the press switch 18, and at the same time compresses the second spring 19 to deform it to generate a force. Then the piston 15 squeezes the press switch 18 to press it. At this time, the first electromagnet 11 is energized with magnetism, so that the iron block 7 is attracted to move with the clamping rod 8 and the slider 9. The slider 9 compresses the first spring 10 to deform it and generate a force. Finally, the iron block 7 is adsorbed and fixed to the first electromagnet 11. The clamping rod 8 leaves the positioning hole 6, canceling the positioning of the toggle plate 3. The torsionally deformed first torsion spring 5 releases the force to rotate the shaft 4 and the toggle plate 3, so that the toggle plate 3 contacts the ground, thereby supporting the entire loudspeaker 1, so that the loudspeaker 1 rotates upward with the hemispherical block 2 as the fulcrum, so that the loudspeaker 1 leaves the water, and subsequently, with the gravity of the hemispherical block 2, the loudspeaker 1 is adjusted to a vertical state, so that the loudspeaker 1 can be prevented from being damaged by water, thereby protecting the loudspeaker 1.

[0041] When the part of the loudspeaker 1 away from the hemispherical block 2 first contacts the ground, and then the side of the hemispherical block 2 contacts the ground, some impurities in the water will attach to the air hole 17, which will cause the air hole 17 to be blocked in the long run. When the air hole 17 is blocked, the piston 15 cannot move, which in turn causes the first electromagnet 11 to be unable to be energized, affecting the use. Therefore, when in use, the mesh tube 20 filters the impurities to avoid clogging of the air hole 17. When the air bag 13 leaves the ground, the piston 15 is reset, and the pressing of the switch 18 is cancelled. After 3S, the controller 24 controls the second electromagnet 22 to be repeatedly energized. The power is turned on and off three times. When the second electromagnet 22 is energized, the attraction strip 21 is caused to rotate with the net cylinder 20, and the second torsion spring 23 is twisted to deform it. When the second electromagnet 22 is de-energized, the second torsion spring 23 releases its force and causes the net cylinder 20 to rotate and reset quickly. During the rotation, impurities on the surface of the net cylinder 20 are thrown outward, so that the impurities are separated from the net cylinder 20. By continuously energizing and de-energizing the second electromagnet 22, the net cylinder 20 can be continuously swung, thereby cleaning it, thereby preventing impurities from being attached to the net cylinder 20 for a long time and not being cleaned, thereby clogging and affecting the movement of the piston 15.

[0042] When the loudspeaker 1 needs to be installed again, the airbag 13 is pressed, and the iron block 7 is attracted according to the same principle. Then the toggle plate 3 is rotated to reset it, and the first torsion spring 5 is twisted with the rotating shaft 4 to torsionally deform it to generate a force, and the airbag 13 is released. According to the same principle, the first electromagnet 11 is powered off, and the adsorption and fixation of the iron block 7 are lost. The first spring 10 releases the force and resets the slider 9 and the card rod 8, and enters the positioning hole 6 to restore the positioning of the toggle plate 3. By retracting the toggle plate 3, the unfolded toggle plate 3 is prevented from affecting the use. The loudspeaker 1 is subsequently fixed again to complete the installation of the loudspeaker 1.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A sound reinforcement device for musical instrument performance, comprising a microphone (1) and a receiver (26), characterized in that: A hemispherical block (2) is fixedly mounted on the bottom of the loudspeaker (1), and a side panel (25) is symmetrically fixedly mounted on the top of the hemispherical block (2). Both sides of the side panel (25) are provided with mounting openings, a toggle plate (3) is provided in the mounting opening, and circular holes are symmetrically provided inside the mounting opening. A rotating shaft (4) is fixedly mounted on both sides of the toggle plate (3), and one end of the rotating shaft (4) is rotatably mounted on the inner wall of the corresponding circular hole. A first torsion spring (5) is sleeved on the outside of the rotating shaft (4), and the two ends of the first torsion spring (5) are fixedly connected to the inner wall of the circular hole and the rotating shaft (4) respectively. A positioning component for positioning the toggle plate (3) is provided on the outside.

2. The sound reinforcement device for musical instrument performance according to claim 1, characterized in that: The positioning assembly includes a clamping rod (8), arc holes are provided at both ends of the side plate (25), a positioning hole (6) is provided on the side of the toggle plate (3) close to the arc hole, an arc groove is provided on the inner wall of the arc hole, a slider (9) is slidably installed in the arc groove, the clamping rod (8) is arranged in the arc hole, the clamping rod (8) is fixedly connected to the slider (9), the side of the slider (9) away from the toggle plate (3) is fixedly connected to the inner wall of the arc groove through a first spring (10), one end of the clamping rod (8) extends into the positioning hole (6), the end of the clamping rod (8) away from the toggle plate (3) is fixedly installed with an iron block (7), a first electromagnet (11) is symmetrically fixedly installed on the top of the hemispherical block (2), the first electromagnet (11) is located between adjacent side plates (25), and a control assembly for controlling the power supply of the first electromagnet (11) is provided on the hemispherical block (2).

3. The sound reinforcement device for musical instrument performance according to claim 2, characterized in that: The control component includes an airbag (13), the material of the airbag (13) is rubber, and the shape is annular. An annular groove is provided on the outer side of the hemispherical block (2). The airbag (13) is fixedly installed in the annular groove. The top of the airbag (13) is flush with the top of the hemispherical block (2). The top of the hemispherical block (2) is provided with a channel connected to the annular groove. A conduit (12) is provided in the channel. One end of the conduit (12) is connected to the airbag (13). A pipe (14) corresponding to the channel opening is fixedly installed on the top of the hemispherical block (2). The pipe A piston (15) is slidably mounted inside the pipe (14), a top plate (16) is fixedly mounted on the top of the pipe (14), an air hole (17) is provided on the top plate (16), the piston (15) is fixedly connected to the top plate (16) through a second spring (19), a switch (18) is fixedly mounted at the middle of the bottom end of the top plate (16), the switch (18) is a waterproof press switch, an anti-blocking component for preventing the air hole (17) from being blocked is provided above the top plate (16), and the switch (18) is used to control the power on and off of the first electromagnet (11).

4. The sound reinforcement device for musical instrument performance according to claim 3, wherein: The anti-blocking component comprises a net cylinder (20) arranged on the top of the pipeline (14), and a swinging component for driving the net cylinder (20) to swing is provided on the outside of the net cylinder (20).

5. The sound reinforcement device for musical instrument performance according to claim 4, characterized in that: The swinging assembly includes a pull rod (21) fixedly mounted on the outside of the net cylinder (20), the pull rod (21) is made of iron, a second electromagnet (22) is fixedly mounted on the top of the pipe (14), a groove is provided on the top of the pipe (14), the groove is circular in shape, the bottom of the net cylinder (20) is rotatably mounted on the bottom wall of the groove, a second torsion spring (23) is sleeved on the outside of the net cylinder (20), the two ends of the second torsion spring (23) are respectively fixedly connected to the bottom wall of the groove and the outside of the net cylinder (20), and a controller (24) is fixedly mounted on the top of the hemispherical block (2) for cooperating with the switch (18) to control the power on and off of the second electromagnet (22).

6. The sound reinforcement device for musical instrument performance according to claim 5, wherein: The weight of the hemispherical block (2) is greater than the sum of all components installed above it.

7. The sound reinforcement device for musical instrument performance according to claim 6, characterized in that: When the toggle plate (3) contacts the ground, the torsion force of the first torsion spring (5) is sufficient to drive all components above the hemispherical block (2) to move in a direction away from the ground. When the toggle plate (3) stops rotating, the angle between the bottom of the toggle plate (3) and the top of the hemispherical block (2) is 140 degrees.

8. The sound reinforcement device for musical instrument performance according to claim 7, wherein: The mesh holes of the mesh cylinder (20) are opened on the side thereof.

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