Shuttlecock whipping power training device

Abstract

The invention belongs to the technical field of physical training instruments, and relates to a badminton whipping force training device which comprises a tube body, a metal sheet, a metal sliding block, a magnet, a force sensor, a pressing rod, a loudspeaker, a microcontroller, an audio synthesis module and a battery. The force sensor is installed in the top end of the pipe body. The bottom end of the pressing rod is fixed to the top end of the metal sliding block, and a through hole allowing the pressing rod to penetrate through is formed in the center of the metal sheet. The loudspeaker is mounted in the tube body; the microcontroller and the audio synthesis module are both mounted in the lower section of the pipe body; the battery is used for supplying power. The training device can be used for a badminton trainee to simulate a racket swinging mode of whip swinging to carry out badminton hitting and ball hitting training, in the continuous training process, sound feedback that the metal sliding block impacts the metal sheet is generated by correct whip force swinging every time, meanwhile, the impact strength can be detected, the strength is broadcasted through the loudspeaker, and the training effect is good. Therefore, a trainer can visually distinguish the strength change in the continuous whipping, strength generating and racket swinging training process.

Description

Technical Field

[0001] The invention belongs to the technical field of sports training equipment, and in particular relates to a badminton whipping force training device. Background Art

[0002] In badminton, many amateurs often mistakenly believe that the competition is about brute strength, and often swing their arms and rackets to hit the ball very hard, but they still have weak hitting or frequent mistakes. The reason is that they have not mastered the swing force technique. Previously, a badminton whip force trainer was popular. Badminton trainers trained by simulating the whip swing method, which helped them master the swing force technique and improve the explosive power of hitting the ball.

[0003] There are already products on sale called "badminton whip force trainers", such as the Z8Y badminton whip force trainer and Q3H badminton whip force trainer sold online, and the patent with announcement number CN221964444U also proposes a badminton whip force trainer; the above-mentioned badminton whip force training device is mainly composed of a tube body, a metal sheet fixed inside the far end of the tube body, a metal slider slidably arranged inside the tube body, and a magnet fixed inside the middle section of the tube body that can be used to magnetically attract the metal slider; the above-mentioned products on sale and the existing patented technology have a sound feedback function, that is, when badminton trainees train by simulating the whipping swing, the correct whipping force swing will cause the metal slider to separate from the magnet and hit the metal sheet to make a sound similar to "da da da", and the incorrect whipping force swing will make it difficult for the metal slider to separate from the magnet and the above-mentioned sound feedback will not appear, or the metal slider has little power and the impact sound is small.

[0004] The above-mentioned prior art uses sound feedback to detect whether the whipping force is correct during training. During the continuous training process, even if sound feedback can be generated every time due to the correct whipping force swinging, the force of each whipping force swinging is different, and it is difficult to capture the difference in the feedback sound volume, and it is also difficult to intuitively distinguish the changes in force during the continuous whipping force swinging training. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a badminton whipping force trainer, which can detect and broadcast the whipping force intensity, making it easy for badminton trainees to intuitively identify the changes in force intensity during the whipping force training process.

[0006] The present invention is achieved through the following technical solutions: A badminton whipping force training device comprises a tube body, a metal sheet fixedly arranged inside the top end of the tube body, a magnetic metal slider slidably arranged inside the tube body, and a magnet fixedly arranged inside the middle section of the tube body and capable of magnetically attracting the metal slider, wherein the metal slider is located between the metal sheet and the magnet; It further includes: a force sensor, a pressure rod, a speaker, a microcontroller, an audio synthesis module, and a battery; The force sensor is installed inside the top end of the tube body and is located on the top surface of the metal sheet, and is used to measure the impact force; the bottom end of the pressure rod is fixed to the top end of the metal slider. The pressure rod can slide in the tube body along with the metal slider. A through hole for the pressure rod to pass through is opened in the center of the metal sheet, making it a ring-shaped sheet structure. When the metal slider breaks away from the magnet and impacts the metal sheet, the pressure rod passes through the metal sheet and impacts the force sensor. The force sensor can measure the impact force to characterize the whipping force during the training process; The speaker is installed inside the tube body and is used to voice broadcast the magnitude of the impact force measured by the force sensor; during continuous training, the magnitude of the whipping force for each swing of the racket is different. The force sensor can measure the magnitude of the impact force for each swing of the racket, and the speaker voices broadcasts the magnitude of the force, enabling the trainer to intuitively distinguish the change in the force during the continuous whipping force swing training from the heard voice broadcast; Both the microcontroller and the audio synthesis module are installed inside the lower section of the tube body. The force sensor and the audio synthesis module are both electrically connected to the microcontroller, and the speaker is electrically connected to the audio synthesis module. The force sensor detects the impact force in real time and transmits the data to the microcontroller. The microcontroller can convert the data into engineering units, and the audio synthesis module triggers the speaker to broadcast the magnitude of the impact force; The battery is installed inside the lower section of the tube body and is used to supply power to the speaker, the force sensor, the microcontroller, and the audio synthesis module.

[0007] Further, the magnet is an electromagnet, and the magnet is electrically connected to the microcontroller. The magnetic force of the magnet is adjustable. The magnetic attraction ability of the magnet to the metal slider can be adjusted by adjusting the magnetic force of the magnet. The greater the magnetic force, the greater the force required for the metal slider to break away from the magnet during the whipping force swing training, and the higher the training difficulty. The smaller the magnetic force, the smaller the force required for the metal slider to break away from the magnet during the whipping force swing training, and the lower the training difficulty. The magnetic force of the magnet can be adjusted according to the training difficulty requirements.

[0008] Further, the trainer further includes a non-polar rotary potentiometer installed inside the bottom end of the tube body. The rotating shaft of the non-polar rotary potentiometer extends out of the bottom end of the tube body for easy rotation adjustment. The non-polar rotary potentiometer is connected in series in the connection circuit between the magnet and the microcontroller. The non-polar rotary potentiometer adjusts the current magnitude in the electromagnet coil by changing the resistance value to adjust the magnetic force of the magnet; the magnetic force of the magnet can be adjusted by rotating the rotating shaft of the non-polar rotary potentiometer at the bottom end of the tube body, and the operation is relatively convenient.

[0009] Further, the tube body is composed of an upper tube body, a lower tube body, an upper end cover, and a lower end cover; the bottom end of the upper tube body is threadedly connected to the top end of the lower tube body, the upper end cover is threadedly connected to the top end of the upper tube body, and the lower end cover is connected to the bottom end of the lower tube body by screws. The composition structure of the above-mentioned tube body is convenient for disassembly and assembly; the inner side wall of the top end of the upper tube body is provided with a first annular step, the speaker is fixedly installed on the top surface of the first annular step, the force sensor is fixedly installed on the bottom surface of the first annular step, and the metal sheet is fixedly installed on the bottom surface of the force sensor; the inner side wall of the top end of the lower tube body is provided with a second annular step, and the magnet, the microcontroller, the audio synthesis module, the battery, and the non-polar rotary potentiometer are all installed inside the lower tube body and located between the second annular step and the lower end cover.

[0010] Further, the middle part of the lower end cover is a convex structure upward. The convex part in the middle of the lower tube body is inserted into the bottom end inside the lower tube body, and a through hole for the rotation shaft of the non-polar rotary potentiometer to pass through is opened in the center thereof. A knob is arranged on the inner side of the convex part in the middle of the lower tube body. The bottom end of the rotation shaft of the non-polar rotary potentiometer is fixedly connected to the knob. The rotation shaft of the non-polar rotary potentiometer can be rotated by rotating the knob outside the lower end cover, so as to adjust the non-polar rotary potentiometer.

[0011] Further, the battery is a rechargeable lithium battery. A charging socket is arranged on the lower end cover. The charging socket is electrically connected to the battery, and the battery can be charged by connecting a charging wire to the charging socket.

[0012] Further, a plurality of sliding grooves are opened on the inner side wall of the upper tube body, the inner side wall of the first annular step, and the inner side of the second annular step, and the plurality of sliding grooves are evenly distributed in a ring centered on the central axis of the upper tube body. The circuit wires between the speaker and the audio synthesis module and the circuit wires between the force sensor and the microcontroller can be arranged through the sliding grooves to prevent the circuit wires from hindering the sliding of the metal slider in the upper tube body.

[0013] Further, a detachable skeleton is arranged inside the lower tube body. The top end of the skeleton abuts against the second annular step, and the bottom end of the skeleton abuts against the lower end cover. The magnet, the microcontroller, the audio synthesis module, the battery, and the non-polar rotary potentiometer are all installed on the skeleton; the skeleton serves as an installation base, and the magnet, the microcontroller, the audio synthesis module, the battery, and the non-polar rotary potentiometer can be disassembled and assembled together with the skeleton.

[0014] Further, an annular gasket is fixedly arranged on the top surface of the second annular step. The annular gasket can buffer the metal slider and reduce the impact when the metal slider slides towards the magnet. Based on the magnetic field of the magnet, the metal slider can be magnetically attracted and fixed on the second annular step.

[0015] Furthermore, a first sound outlet hole is provided at the center of the upper end cover to help the sound emitted by the speaker to diffuse outward; a second sound outlet hole is provided on the upper side wall of the upper tube body to help the sound generated by the collision between the metal slider and the metal sheet to diffuse outward.

[0016] It can be seen from the above technical solution that the badminton whipping force training device provided by the present invention has the following beneficial effects: The trainer can be used for badminton trainees to simulate the whip-swinging method to perform badminton hitting training. Correct whipping and force swinging can make the metal slider separate from the magnet and slide inside the upper tube body. The metal slider hits the metal sheet and makes a sound similar to "da da da". When the correct whipping and force swinging produces sound feedback, the metal slider hits the metal sheet and the pressure rod hits the force sensor at the same time. The force sensor detects the impact force in real time and transmits the data to the microcontroller. The microcontroller can convert the data into engineering units (such as the unit N of impact force) and send it to the audio synthesis module. The audio synthesis module triggers the loudspeaker to broadcast the size of the impact force. During the continuous training process, each correct whipping and force swing produces sound feedback of the metal slider hitting the metal sheet. At the same time, the impact force can also be detected, and the strength is broadcast by the loudspeaker, so that the trainee can intuitively distinguish the change of force during the continuous whipping and force swinging training. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged local structure in the middle.

[0020] Figure 3 for Figure 1 Enlarged schematic diagram of the local structure at point B in the middle.

[0021] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure in the CC direction.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 6 It is a schematic diagram of the explosion structure of the present invention.

[0024] Names of components in the figure: 1. Pipe body; 1.1 Upper pipe body; 1.2 Lower pipe body; 1.3 Lower end cover; 1.4 Upper end cover; 1.5 Chute; 1.6 First sound hole; 1.7 First annular step; 1.8 Second sound hole; 1.9 Second annular step; 2. Metal sheet; 3. Speaker; 4. Force sensor; 5. Pressure rod; 6. Metal slider; 7. Magnet; 8. Microcontroller; 9. Audio synthesis module; 10. Battery; 11. Infinite rotation potentiometer; 12. Charging socket; 13. Skeleton; 14. Annular gasket. Specific embodiments

[0025] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0027] A badminton whipping force training device, as Figure 1 shown, mainly consists of a pipe body 1, a metal sheet 2, a speaker 3, a force sensor 4, a pressure rod 5, a metal slider 6, a magnet 7, a microcontroller 8, an audio synthesis module 9, a battery 10, an infinite rotation potentiometer 11 and a skeleton 13.

[0028] As Figure 1 shown, the pipe body 1 is composed of an upper pipe body 1.1, a lower pipe body 1.2, an upper end cover 1.4 and a lower end cover 1.3. Both the upper pipe body 1.1 and the lower pipe body 1.2 are circular tubular structures; the bottom end of the upper pipe body 1.1 is threadedly connected to the top end of the lower pipe body 1.2, the upper end cover 1.4 is threadedly connected to the top end of the upper pipe body 1.1, and the lower end cover 1.3 is connected to the bottom end of the lower pipe body 1.2 by screws. The above composition structure of the pipe body 1 is convenient for disassembly and assembly; As Figure 2 shown, a first annular step 1.7 is provided on the inner side wall of the top end of the upper pipe body 1.1. The speaker 3 is fixedly installed on the top surface of the first annular step 1.7, the force sensor 4 is fixedly installed on the bottom surface of the first annular step 1.7, and the metal sheet 2 is fixedly installed on the bottom surface of the force sensor 4. Specifically, to improve the stability of the metal sheet 2, screws extending radially (not shown in the figure) can be provided on the outer side wall of the upper pipe body 1.1, and the screws are threadedly connected to the outer side wall of the metal sheet 2 to apply a radial binding force to the metal sheet 2, thereby enhancing the stability of the metal sheet 2 in the upper pipe body 1.1; As Figure 1 and Figure 3 shown, a second annular step 1.9 is provided on the inner wall of the top end of the lower tube body 1.2. The magnet 7, the microcontroller 8, the audio synthesis module 9, the battery 10, and the stepless rotary potentiometer 11 are all installed inside the lower tube body 1.2 and are located between the second annular step 1.9 and the lower end cover 1.3.

[0029] As Figure 1 shown, the metal sheet 2 is a hollow cylindrical structure made of stainless steel or iron, and the metal slider 6 is a cylindrical structure made of magnetic iron. The metal slider 6 can be magnetically attracted by the magnet 7, and the metal slider 6 can slide between the metal sheet 2 and the second annular step 1.9 inside the upper tube body 1.1; the bottom end of the pressure rod 5 is fixed to the top end of the metal slider 6, and the pressure rod 5 can slide with the metal slider 6 inside the tube body 1; when the metal slider 6 breaks away from the magnet 7 and impacts the metal sheet 2, the pressure rod 5 passes through the metal sheet 2 and impacts the force sensor 4, and the force sensor 4 can measure the impact force to characterize the whipping force during the training process.

[0030] As Figure 1 and Figure 6 shown, the skeleton 13 is detachably arranged inside the lower tube body 1.2. The top end of the skeleton 13 abuts against the second annular step 1.9, and the bottom end of the skeleton 13 abuts against the lower end cover 1.3. The magnet 7, the microcontroller 8, the audio synthesis module 9, the battery 10, and the stepless rotary potentiometer 11 are all installed on the skeleton 13, and the rotating shaft of the stepless rotary potentiometer 11 extends out of the lower end cover 1.3 for easy rotation adjustment; the skeleton 13 serves as an installation base, and the magnet 7, the microcontroller 8, the audio synthesis module 9, the battery 10, and the stepless rotary potentiometer 11 can be disassembled and assembled with the skeleton 13.

[0031] The magnet 7 is an electromagnet, and the magnetic force of the magnet 7 is adjustable. The magnetic attraction ability of the magnet 7 to the metal slider 6 can be adjusted by adjusting the magnetic force of the magnet 7. The greater the magnetic force, the greater the force required for the metal slider 6 to break away from the magnet 7 during the whipping force swing training, and the higher the training difficulty. The smaller the magnetic force, the smaller the force required for the metal slider 6 to break away from the magnet 7 during the whipping force swing training, and the lower the training difficulty. The magnetic force of the magnet 7 can be adjusted according to the training difficulty requirements.

[0032] The force sensor 4, the magnet 7, and the audio synthesis module 9 are all electrically connected to the microcontroller 8, the speaker 3 is electrically connected to the audio synthesis module 9, and the stepless rotary potentiometer 11 is connected in series in the connection circuit between the magnet 7 and the microcontroller 8; As Figure 1As shown, the battery 10 is installed inside the lower section of the tube body 1 and is used to supply power to the speaker 3, the force sensor 4, the microcontroller 8, and the audio synthesis module 9. The battery 10 is a rechargeable lithium battery. A charging socket 12 is provided on the lower end cap 1.3. The charging socket 12 is electrically connected to the battery 10. By connecting a charging cable to the charging socket 12, the battery 10 can be charged. In addition, it can also be a dry battery, but it is relatively inconvenient to replace the battery. Specifically, the force sensor 4 is a strain gauge force sensor, a piezoresistive force sensor, an impact force sensor, or a piezoelectric force sensor. Its specific structure and working principle are both prior arts. The microcontroller 8 can be an Arduino, and the audio synthesis module 9 can be a DFPlayer Mini and a Micro SD card. Voice files (such as "100N.mp3") can be pre-stored in the Micro SD card, and the DFPlayer Mini is used to trigger the corresponding voice files. The above hardware connections can be as follows: The force sensor 4 is connected to the Arduino analog input pin (such as A0), the DFPlayerMini (connected to the SD card with pre-stored voices) is connected to the Arduino serial port pins (RX / TX), and the speaker 3 is connected to the audio output port of the DFPlayerMini. The force sensor 4 detects the impact force in real time and transmits the data to the microcontroller 8. The microcontroller 8 can convert the data into engineering units (such as the unit N of the impact force), and the audio synthesis module 9 triggers the speaker 3 to broadcast the magnitude of the impact force.

[0033] As Figures 1 to 4 shown, a plurality of sliding grooves 1.5 are provided on the inner side wall of the upper tube body 1.1, the inner side wall of the first annular step 1.7, and the inner side of the second annular step 1.9. The plurality of sliding grooves 1.5 are evenly distributed in a ring centered on the central axis of the upper tube body 1.1. The circuit lines between the speaker 3 and the audio synthesis module 9 and the circuit lines between the force sensor 4 and the microcontroller 8 can be arranged through the sliding grooves 1.5 to prevent the circuit lines from hindering the sliding of the metal slider 6 in the upper tube body 1.1.

[0034] As a preferred embodiment, in this embodiment, as Figure 1 shown, the middle part of the lower end cap 1.3 is a structure that bulges upward. The middle bulging part of the lower tube body 1.2 is inserted into the bottom inside of the lower tube body 1.2, and a through hole is provided at its center for the rotation shaft of the potentiometer 11 to pass through. A knob is provided on the inner side of the middle bulging part of the lower tube body 1.2. The bottom end of the rotation shaft of the potentiometer 11 is fixedly connected to the knob. The rotation shaft of the potentiometer 11 can be rotated by rotating the knob outside the lower end cap 1.3 to adjust the potentiometer 11.

[0035] As a preferred embodiment, in this embodiment, as Figure 1 andFigure 3 As shown, an annular gasket 14 is fixedly provided on the top surface of the second annular step 1.9. The annular gasket 14 can buffer the metal slider 6 and reduce the impact when the metal slider 6 slides toward the magnet 7. Based on the magnetic field of the magnet 7, it can magnetically attract the metal slider 6 and magnetically fix the metal slider 6 on the second annular step 1.9.

[0036] As a preferred embodiment, in this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, a first sound outlet hole 1.6 is provided at the center of the upper end cover 1.4 to help the sound emitted by the speaker 3 to diffuse outward, making it easier for the trainee to hear the voice broadcast; a second sound outlet hole 1.8 is provided on the upper side wall of the upper tube body 1.1 to help the sound generated by the collision between the metal slider 6 and the metal sheet 2 to diffuse outward.

[0037] The working principle of this embodiment: When using the trainer to simulate the whip-swinging method for badminton batting training, the trainee holds the lower tube 1.2 with his hand and swings the trainer. The correct whipping force swinging will make the metal slider 6 separate from the magnet 7 and slide in the upper tube 1.1, and the metal slider 6 hits the metal sheet 2 to make a sound similar to "da da da". The wrong whipping force swinging or insufficient swinging force will make it difficult for the metal slider 6 to separate from the magnet 7 and the above-mentioned sound feedback will not appear, or the metal slider 6 has little power and causes a small impact sound. When the correct whipping force swing produces sound feedback, the metal slider 6 hits the metal sheet 2 at the same time, and the pressure rod 5 hits the force sensor 4. The force sensor 4 detects the impact force in real time and transmits the data to the microcontroller The microcontroller 8 can convert the data into engineering units (such as the unit of impact force N), and the audio synthesis module 9 triggers the loudspeaker 3 to broadcast the magnitude of the impact force. During the continuous training process, each correct whipping and swinging will generate sound feedback of the metal slider 6 hitting the metal sheet 2. At the same time, the impact force can also be detected, and the loudspeaker 3 will broadcast the magnitude of the force, so that the trainee can intuitively distinguish the change of the force during the continuous whipping and swinging training; the trainee turns the shaft of the stepless rotary potentiometer 11, and the stepless rotary potentiometer 11 adjusts the current flowing through the coil of the magnet 7 by changing the resistance value to adjust the magnetic force of the magnet 7, and can be quickly adjusted according to the difficulty requirements of the training.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A badminton whipping force training device, comprising a tube body (1), a metal sheet (2) fixedly arranged inside the top end of the tube body (1), a magnetic metal slider (6) slidably arranged inside the tube body (1), and a magnet (7) fixedly arranged inside the middle section of the tube body (1) and capable of magnetically attracting the metal slider (6). The metal slider (6) is located between the metal sheet (2) and the magnet (7), and is characterized in that, Also includes: A force sensor (4), the force sensor (4) being installed inside the top end of the tube body (1) and located on the top surface of the metal sheet (2), and being used to measure the impact force; A pressure rod (5), the bottom end of the pressure rod (5) is fixed to the top end of the metal slider (6), a through hole is provided in the center of the metal sheet (2) for the pressure rod (5) to pass through, and when the metal slider (6) is separated from the magnet (7) and hits the metal sheet (2), the pressure rod (5) passes through the metal sheet (2) and hits the force sensor (4); A loudspeaker (3), the loudspeaker (3) being installed inside the tube body (1) and used for voice broadcasting the magnitude of the impact force measured by the force sensor (4); A microcontroller (8) and an audio synthesis module (9), wherein the microcontroller (8) and the audio synthesis module (9) are both installed inside the lower section of the tube body (1), the force sensor (4) and the audio synthesis module (9) are both electrically connected to the microcontroller (8), and the speaker (3) is electrically connected to the audio synthesis module (9); A battery (10) is installed inside the lower section of the tube body (1) and is used to supply power to the speaker (3), the force sensor (4), the microcontroller (8) and the audio synthesis module (9).

2. The badminton whipping force training device according to claim 1, characterized in that: The magnet (7) is an electromagnet. The magnet (7) is electrically connected to the microcontroller (8). The magnetic force of the magnet (7) is adjustable.

3. The badminton whipping force training device according to claim 2, wherein: The training device further comprises a stepless rotary potentiometer (11) installed inside the bottom end of the tube body (1), wherein the rotating shaft of the stepless rotary potentiometer (11) extends out of the bottom end of the tube body (1) for easy rotation adjustment, and the stepless rotary potentiometer (11) is connected in series to the connection circuit between the magnet (7) and the microcontroller (8), and the stepless rotary potentiometer (11) adjusts the current in the electromagnet coil by changing the resistance value to adjust the magnetic force of the magnet (7).

4. The badminton whipping force training device according to claim 3, characterized in that: The tube body (1) is composed of an upper tube body (1.1), a lower tube body (1.2), an upper end cover (1.4) and a lower end cover (1.3); the bottom end of the upper tube body (1.1) is threadedly connected to the top end of the lower tube body (1.2), the upper end cover (1.4) is threadedly connected to the top end of the upper tube body (1.1), and the lower end cover (1.3) is connected to the bottom end of the lower tube body (1.2) by screws; a first annular step (1.7) is provided on the inner side wall of the top end of the upper tube body (1.1), and the speaker (3) is fixedly mounted on the first annular step. The top surface of the step (1.7), the force sensor (4) is fixedly mounted on the bottom surface of the first annular step (1.7), and the metal sheet (2) is fixedly mounted on the bottom surface of the force sensor (4); a second annular step (1.9) is arranged on the inner side wall of the top end of the lower tube body (1.2); the magnet (7), the microcontroller (8), the audio synthesis module (9), the battery (10), and the stepless rotary potentiometer (11) are all mounted inside the lower tube body (1.2) and are located between the second annular step (1.9) and the lower end cover (1.3).

5. The badminton whipping force training device according to claim 4, characterized in that: The middle part of the lower end cover (1.3) is a convex structure upward. The convex part in the middle of the lower tube body (1.2) is inserted into the bottom inside of the lower tube body (1.2), and a through hole for the rotation shaft of the endless rotary potentiometer (11) to pass through is provided at its center. A knob is arranged on the inner side of the convex part in the middle of the lower tube body (1.2), and the bottom end of the rotation shaft of the endless rotary potentiometer (11) is fixedly connected with the knob.

6. The badminton whipping force training device according to claim 4, characterized in that: The battery (10) is a rechargeable lithium battery. A charging socket (12) is arranged on the lower end cover (1.3), and the charging socket (12) is electrically connected with the battery (10).

7. The badminton whipping force training device according to claim 4, characterized in that: A plurality of sliding grooves (1.5) are provided on the inner side wall of the upper tube body (1.1), the inner side wall of the first annular step (1.7) and the inner side of the second annular step (1.9), and the plurality of sliding grooves (1.5) are evenly distributed in a ring centered on the central axis of the upper tube body (1.1). The circuit lines between the speaker (3) and the audio synthesis module (9) and the circuit lines between the force sensor (4) and the microcontroller (8) can be arranged through the sliding grooves (1.5).

8. The badminton whipping force training device according to any one of claims 4 to 7, characterized in that: A detachable skeleton (13) is arranged in the lower tube body (1.2). The top end of the skeleton (13) abuts against the second annular step (1.9), and the bottom end of the skeleton (13) abuts against the lower end cover (1.3). The magnet (7), the microcontroller (8), the audio synthesis module (9), the battery (10) and the endless rotary potentiometer (11) are all installed on the skeleton (13).

9. The badminton whipping force training device according to claim 8, characterized in that: An annular gasket (14) is fixedly arranged on the top surface of the second annular step (1.9).

10. The badminton whipping force training device according to claim 4, characterized in that: A first sound outlet hole (1.6) is provided at the center of the upper end cover (1.4); a second sound outlet hole (1.8) is provided on the upper side wall of the upper tube body (1.1).

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