An arm strength training device for sports

Abstract

The application discloses a kind of arm strength training equipment for sports, belong to sports training equipment technical field.The equipment includes arm strength training mechanism, face scanning mechanism, leg hooking mechanism and arm strength switching mechanism, arm strength training mechanism provides support and power base for whole, arm strength switching mechanism realizes the accurate switching of push / pull training mode by motor drive gear rack transmission, leg hooking mechanism can be adjusted, adapt to different users to realize the reliable fixation of leg, face scanning mechanism is built-in with the creative face scanning identification system, face image is collected by camera and is analyzed by multi-module algorithm to realize fatigue grade determination and grading early warning.The application realizes arm strength mode one-key switching, leg self-adapting fixation, face fatigue accurate monitoring and equipment reset intelligent prompting, structure is stable, operation is convenient, training safety and adaptability are greatly improved, suitable for various sports fitness, arm strength training scene.

Description

Technical Field

[0001] This invention belongs to the field of sports training equipment technology, and in particular relates to a sports arm strength training device. Background Technology

[0002] Arm strength training is a core component of physical fitness and conditioning, and corresponding arm strength training equipment is a fundamental piece of equipment in various fitness venues. However, existing arm strength training equipment suffers from numerous technical shortcomings in practical use, failing to meet users' safety, adaptability, and diverse training needs. Specific problems include: Most arm strength training equipment can only train in one direction, either pushing or pulling. If you need to switch training modes, you have to manually disassemble and adjust the mechanical parts, which is cumbersome and the equipment is unstable after switching. Loose parts can easily cause training safety hazards. Users are prone to over-fatigue during high-intensity arm strength training, which may lead to shock in severe cases. However, existing equipment does not have any fatigue monitoring methods and relies solely on the user's own judgment, making it extremely unsafe.

[0003] Therefore, it is necessary to provide a new arm strength training device for sports to solve the above-mentioned technical problems. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a sports arm strength training device that achieves one-click switching of arm strength mode, adaptive leg fixation, accurate facial fatigue monitoring and intelligent device reset reminder, stable structure, convenient operation, greatly improved training safety and adaptability, and is suitable for various sports fitness and arm strength training scenarios.

[0005] To solve the above-mentioned technical problems, the present invention provides a sports arm strength training device, comprising: an arm strength training mechanism, a face scanning mechanism, a leg clamping mechanism, and an arm strength switching mechanism; The arm strength training mechanism is the basic equipment of the arm strength training device, which is used to provide users with a training support carrier and a mechanical transmission basis for arm strength exertion; The facial scanning mechanism is used to scan and identify human facial images during user training and analyze them using algorithms to determine the fatigue level, promptly reminding trainees to rest and avoid overtraining that could lead to shock. The leg-hooking mechanism is used to hook and fix the user's legs during training to prevent leg movement from affecting the training effect. The arm strength switching mechanism is used to achieve precise switching between two arm strength training modes: pushing and pulling, to meet the diverse training needs of users. The arm strength training mechanism includes two horizontal steel pipe bases, two vertical steel pipe bases fixedly installed between the two horizontal steel pipe bases, and a second horizontal steel pipe base fixedly installed between the two vertical steel pipe bases. A seat support is fixedly installed on the top of the second horizontal steel pipe base. An L-shaped seat base is fixedly installed on the left side of the seat support. A training seat is fixedly installed on the top of the L-shaped seat base. A tilting bracket is fixedly installed on the top of the corresponding first horizontal steel pipe base. A rectangular auxiliary tube is fixedly installed on the top of the tilting bracket. A second rectangular auxiliary tube is fixedly installed on the side of the first rectangular auxiliary tube closer to the training seat. The side of the second rectangular auxiliary tube away from the first rectangular auxiliary tube is fixedly connected to the seat support.

[0006] As a further embodiment of the present invention, the arm strength training mechanism further includes two rectangular robotic arms, with an auxiliary short shaft one and an auxiliary short shaft two disposed between the two rectangular robotic arms. The two ends of the auxiliary short shaft one are fixedly connected to the two rectangular robotic arms, and the two ends of the auxiliary short shaft two are respectively fixedly connected to the two rectangular robotic arms. Training handles are fixedly installed on the inner sides of both rectangular robotic arms. An embedded connecting groove is provided at the bottom of the rectangular robotic arm, and an embedded limiting slider is slidably installed in the embedded connecting groove. A hinge rod is hinged to the embedded limiting slider, and a riveting rod is fixedly installed on the side of the hinge rod near the rectangular auxiliary tube one. The end of the riveting rod away from the hinge rod is rotatably installed on the rectangular auxiliary tube one. The same embedded slider mounting shaft is fixedly installed on the inner walls of both sides of the embedded connecting groove, and the embedded limiting slider is slidably sleeved on the corresponding embedded slider mounting shaft.

[0007] As a further embodiment of the present invention, the arm force switching mechanism includes a rectangular mounting box fixedly installed on one side of a corresponding transverse steel pipe base. An embedded driven box that moves in an up-and-down direction is slidably installed inside the rectangular mounting box. A circular driven rod is fixedly installed on the top of the embedded driven box. The top end of the circular driven rod extends to the outside of the rectangular mounting box and is hinged to a circular sleeve. The circular sleeve is rotatably fitted onto an auxiliary short shaft. Two driven rod connecting holes are provided on the top of the embedded driven box. A counterweight placement rod is slidably installed inside the embedded driven box. Multiple C-shaped counterweights are sleeved on the counterweight placement rod, and the top end of the counterweight placement rod extends into the embedded driven box. An embedded driven shaft is slidably installed inside the rectangular mounting box. The top end of the embedded driven shaft extends into the embedded driven box. A spring pressure plate is fixedly installed at the bottom end of the embedded driven shaft. A telescopic spring is fixedly installed at the bottom of the spring pressure plate, and the bottom end of the telescopic spring is fixedly connected to the bottom inner wall of the rectangular mounting box.

[0008] As a further embodiment of the present invention, the arm force switching mechanism further includes two circular locking holes, which are respectively opened on the counterweight placement rod and the embedded driven shaft. A small DC geared motor is fixedly installed on the inner wall of the embedded driven box near the training seat. A circular gear is fixed on the output shaft of the small DC geared motor. Two rectangular racks mesh on the circular gear, and the two rectangular racks move in opposite directions. A cylindrical locking rod is fixedly installed on the rectangular rack, and the cylindrical locking rod is adapted to the corresponding circular locking hole. The forward start of the small DC geared motor allows the upper cylindrical lever to engage with the corresponding circular locking hole and the lower cylindrical lever to disengage from the corresponding circular locking hole, switching to the thrust training mode; the reverse start of the small DC geared motor allows the lower cylindrical lever to engage with the corresponding circular locking hole and the upper cylindrical lever to disengage from the corresponding circular locking hole, switching to the tension training mode.

[0009] As a further embodiment of the present invention, two U-shaped limiting seats are fixedly installed on the inner wall of the rectangular mounting box on the side away from the training seat. The two U-shaped limiting seats are arranged in an upper and lower position. A rack limiting rod is slidably installed on the U-shaped limiting seat. The rack limiting rod is fixedly connected to the corresponding rectangular rack. The rack limiting rod is used to limit the movement direction of the rectangular rack and prevent it from deviating and falling off.

[0010] As a further embodiment of the present invention, the arm force switching mechanism further includes two circular limiting blocks, namely, circular limiting block 1 and circular limiting block 2. Circular limiting block 1 is fixedly sleeved on the counterweight placement rod and is located inside the embedded driven box. Circular limiting block 1 is in contact with the bottom inner wall of the embedded driven box. Circular limiting block 2 is fixedly sleeved on the embedded driven shaft 1 and is located outside the embedded driven box and in contact with the bottom of the embedded driven box. An alignment sensor 1 is fixedly installed on the outer wall of the embedded driven box away from the embedded driven shaft 1. An alignment sensor 2 is fixedly installed on the inner wall of the rectangular mounting box near the alignment sensor 1. When alignment sensor 1 and alignment sensor 2 are aligned, a home position reminder signal is triggered to remind the user to return the device to its initial position.

[0011] As a further embodiment of the present invention, the facial scanning mechanism includes two longitudinal steel pipe bases II, which are respectively fixedly installed on both sides of a corresponding transverse steel pipe base I. A transverse steel pipe base III is fixedly installed on the two longitudinal steel pipe bases II. A display bracket is fixedly installed on the top of the transverse steel pipe base III. A first display is detachably installed on the display bracket by screws. The first display has a built-in facial scanning and recognition system and a camera that is used to capture the user's facial images. The facial scanning and recognition system can extract facial fatigue features, determine the fatigue level, and provide graded warnings to avoid shock caused by overtraining.

[0012] As a further embodiment of the present invention, the leg hooking mechanism includes a rectangular pipe, which is fixedly installed on the top of a corresponding transverse steel pipe base. A U-shaped pipe is installed on the rectangular pipe via bolts. A transverse connecting shaft is fixedly installed on both sides of the U-shaped pipe. A circular protective sleeve is rotatably sleeved on the transverse connecting shaft. The circular protective sleeve is used to reduce frictional damage between the leg and the transverse connecting shaft.

[0013] As a further aspect of the present invention, the facial scanning and recognition system includes an image acquisition module, an image preprocessing module, a facial feature extraction module, a fatigue level determination module, a graded early warning module, and a data storage module. The image acquisition module is a camera built into the first display, used to capture facial images of the user during the training process in real time. The image preprocessing module is used to perform noise reduction, grayscale conversion, and face region cropping on the acquired facial images. The facial feature extraction module is used to extract fatigue feature parameters such as eye closure degree, corner of mouth drooping degree, and proportion of facial flushing area from the preprocessed image; The fatigue level determination module calculates fatigue characteristic parameters using a weighted algorithm to determine the user's fatigue level. The graded early warning module triggers corresponding audible and visual early warning signals based on the fatigue level. The data storage module is used to store facial images, feature parameters, fatigue levels, and early warning records.

[0014] As a further aspect of the present invention, the weighted algorithm formula of the fatigue level determination module is as follows: ; Where F is the overall fatigue value, E is the degree of eye closure (0≤E≤1), M is the degree of drooping of the corner of the mouth (0≤M≤1), R is the proportion of facial flushing area (0≤R≤1), α, β, and γ are weighting coefficients, and α+β+γ=1, α=0.5, β=0.2, and γ=0.3; Based on the comprehensive fatigue value, the fatigue level is divided into three levels: F < 0.3 is the normal level, 0.3 ≤ F < 0.7 is the mild fatigue level, and F ≥ 0.7 is the severe fatigue level.

[0015] Compared with related technologies, the arm strength training device for sports provided by this invention has the following beneficial effects: This invention uses a small DC geared motor to drive a rack and pinion transmission, realizing electric switching between push and pull training modes without the need for manual disassembly and adjustment of components, making operation convenient; at the same time, the rack and pinion limit rod and the circular limit block one / two limit the transmission direction and position, preventing components from shifting or falling off, ensuring precise transmission and stable structure of the equipment. This invention uses a leg-hooking mechanism with an i-shaped tube and bolts to achieve height adjustment, which can accommodate users of different heights and leg lengths, and achieve reliable leg hooking and fixation, avoiding leg movement during training that affects power generation efficiency; the circular protective sleeve on the transverse connecting shaft effectively reduces friction between the leg and metal parts, prevents skin damage, and provides good protection. This invention utilizes a facial scanning recognition system for accurate fatigue monitoring and tiered early warning: The self-designed facial scanning recognition system integrates image acquisition, preprocessing, feature extraction, algorithm judgment, and tiered early warning functions. It calculates a comprehensive fatigue value through a weighted algorithm, accurately determines the fatigue level, and triggers corresponding early warnings, fundamentally avoiding the risk of shock caused by overtraining and significantly improving training safety. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the arm strength training mechanism in this invention; Figure 3 This is a schematic diagram of the left sectional view of the rectangular mounting box in this invention; Figure 4 for Figure 3 A magnified structural diagram of part A in the middle; Figure 5 This is an assembly drawing of the small and medium-sized DC geared motor, circular gear, rectangular rack, rack limiting rod and return-shaped limiting seat in this invention; Figure 6 This is a partial cross-sectional view of the rectangular robotic arm in this invention.

[0018] In the diagram: 100. Arm strength training mechanism; 101. Rectangular robotic arm; 102. Auxiliary short axis one; 103. Auxiliary short axis two; 105. Training handle; 106. Embedded connecting groove; 107. Embedded limiting slider; 108. Hinge rod; 109. Riveting rod; 200. Facial scanning mechanism; 201. Longitudinal steel pipe base two; 202. Transverse steel pipe base three; 203. Monitor bracket; 204. First monitor; 300. Leg clamping mechanism; 301. Rectangular pipe one; 302. C-shaped pipe; 303. Transverse connecting shaft; 304. Circular protective sleeve; 1. Transverse steel pipe base one; 2. Longitudinal steel pipe base one; 3. Transverse steel pipe base two; 4. Seat support; 5. L 6. Training seat; 7. Inclined bracket; 8. Rectangular auxiliary tube one; 9. Rectangular auxiliary tube two; 11. Rectangular mounting box; 12. Embedded driven box; 13. Circular driven rod; 14. Circular sleeve; 15. Driven rod connecting hole; 16. Counterweight placement rod; 17. C-shaped counterweight; 18. Embedded driven shaft one; 19. Spring pressure plate; 20. Telescopic spring; 21. Circular locking hole; 22. Small DC geared motor; 23. Circular gear; 24. Rectangular rack; 25. Cylindrical locking rod; 26. Circular limit block one; 27. Circular limit block two; 28. Alignment sensor one; 29. ​​Alignment sensor two; 2401. Rack limit rod; 2402. Recurve-shaped limit seat. Detailed Implementation

[0019] Please refer to the following: Figure 1 and Figure 6 ,in, Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the arm strength training mechanism in this invention; Figure 3 This is a schematic diagram of the left sectional view of the rectangular mounting box in this invention; Figure 4 for Figure 3 A magnified structural diagram of part A in the middle; Figure 5 This is an assembly drawing of the small and medium-sized DC geared motor, circular gear, rectangular rack, rack limiting rod and return-shaped limiting seat in this invention; Figure 6 This is a partial cross-sectional view of the rectangular robotic arm in this invention. The sports arm strength training equipment is characterized by comprising an arm strength training mechanism 100, a face scanning mechanism 200, a leg hooking mechanism 300, and an arm strength switching mechanism; the arm strength training mechanism 100 is the basic equipment of the arm strength training equipment, used to provide users with a training support carrier and a mechanical transmission basis for arm strength generation; The facial scanning mechanism 200 is used to scan and identify human facial images during user training and analyze them using algorithms to determine the fatigue level, promptly reminding the trainee to rest and avoid overtraining leading to shock. The leg hooking mechanism 300 is used to hook and fix the user's legs during training to prevent leg movement from affecting the training effect. The arm strength switching mechanism is used to achieve precise switching between two arm strength training modes: pushing and pulling, to meet the diverse training needs of users. The arm strength training mechanism 100 includes two transverse steel pipe bases 1, two longitudinal steel pipe bases 2 are fixedly installed between the two transverse steel pipe bases 1, and a transverse steel pipe base 3 is fixedly installed between the two longitudinal steel pipe bases 2. A seat support 4 is fixedly installed on the top of the transverse steel pipe base 3. An L-shaped seat base 5 is fixedly installed on the left side of the seat support 4. A training seat 6 is fixedly installed on the top of the L-shaped seat base 5. A tilting bracket 7 is fixedly installed on the top of the corresponding transverse steel pipe base 1. A rectangular auxiliary tube 8 is fixedly installed on the top of the tilting bracket 7. A rectangular auxiliary tube 9 is fixedly installed on the side of the rectangular auxiliary tube 8 closest to the training seat 6. The side of the rectangular auxiliary tube 9 furthest from the rectangular auxiliary tube 8 is fixedly connected to the seat support 4.

[0020] The arm strength training mechanism 100 also includes two rectangular robotic arms 101. An auxiliary short shaft 102 and an auxiliary short shaft 2 103 are disposed between the two rectangular robotic arms 101. The two ends of the auxiliary short shaft 102 are fixedly connected to the two rectangular robotic arms 101, and the two ends of the auxiliary short shaft 2 103 are respectively fixedly connected to the two rectangular robotic arms 101. Training handles 105 are fixedly installed on the inner side of each of the two rectangular robotic arms 101. An embedded connecting groove 106 is provided at the bottom of each rectangular robotic arm 101. An embedded limiting slider 107 is slidably installed in the embedded connecting groove 106. A hinge rod 108 is hinged to the embedded limiting slider 107. A riveting rod 109 is fixedly installed on the side of the hinge rod 108 near the rectangular auxiliary tube 8. The end of the riveting rod 109 away from the hinge rod 108 is rotatably installed on the rectangular auxiliary tube 8. The same embedded slider mounting shaft is fixedly installed on the inner walls of both sides of the embedded connecting groove 106. The embedded limiting slider 107 is slidably sleeved on the corresponding embedded slider mounting shaft.

[0021] The arm force switching mechanism includes a rectangular mounting box 11 fixedly installed on one side of the corresponding transverse steel pipe base 1. An embedded driven box 12, which moves in the up-down direction, is slidably installed inside the rectangular mounting box 11. A circular driven rod 13 is fixedly installed on the top of the embedded driven box 12. The top end of the circular driven rod 13 extends to the outside of the rectangular mounting box 11 and is hinged to a circular sleeve 14. The circular sleeve 14 is rotatably fitted onto the auxiliary short shaft 102. Two driven rod connecting holes 15 are provided on the top of the embedded driven box 12. A counterweight placement rod 16 is movably installed, and multiple C-shaped counterweights 17 are sleeved on the counterweight placement rod 16. The top end of the counterweight placement rod 16 extends into the embedded driven box 12. An embedded driven shaft 18 is slidably installed in the rectangular mounting box 11. The top end of the embedded driven shaft 18 extends into the embedded driven box 12. A spring pressure plate 19 is fixedly installed at the bottom end of the embedded driven shaft 18. A telescopic spring 20 is fixedly installed at the bottom of the spring pressure plate 19. The bottom end of the telescopic spring 20 is fixedly connected to the bottom inner wall of the rectangular mounting box 11.

[0022] The arm strength switching mechanism also includes two circular locking holes 21, which are respectively opened on the counterweight placement rod 16 and the embedded driven shaft 18. A small DC geared motor 22 is fixedly installed on the inner wall of the embedded driven box 12 near the training seat 6. A circular gear 23 is fixed on the output shaft of the small DC geared motor 22. Two rectangular racks 24 mesh on the circular gear 23, and the two rectangular racks 24 move in opposite directions. A cylindrical locking rod 25 is fixedly installed on the rectangular racks 24, and the cylindrical locking rod 25 is adapted to the corresponding circular locking hole 21. Starting the small DC geared motor 22 in the forward direction allows the upper cylindrical clamp 25 to engage with the corresponding circular clamp 21, while the lower cylindrical clamp 25 disengages from the corresponding circular clamp 21, switching to the thrust training mode; starting the small DC geared motor 22 in the reverse direction allows the lower cylindrical clamp 25 to engage with the corresponding circular clamp 21, while the upper cylindrical clamp 25 disengages from the corresponding circular clamp 21, switching to the tension training mode.

[0023] Two U-shaped limiting seats 2402 are fixedly installed on the inner wall of the rectangular mounting box 11 away from the training seat 6. The two U-shaped limiting seats 2402 are arranged in an upper and lower position. A rack limiting rod 2401 is slidably installed on the U-shaped limiting seat 2402. The rack limiting rod 2401 is fixedly connected to the corresponding rectangular rack 24. The rack limiting rod 2401 is used to limit the movement direction of the rectangular rack 24 and prevent it from deviating and falling off.

[0024] The arm force switching mechanism also includes two circular limit blocks 1 26 and 27. The circular limit block 1 26 is fixedly sleeved on the counterweight placement rod 16 and is located inside the embedded driven box 12. The circular limit block 1 26 is in contact with the bottom inner wall of the embedded driven box 12. The circular limit block 27 is fixedly sleeved on the embedded driven shaft 18 and is located outside the embedded driven box 12 and is in contact with the bottom of the embedded driven box 12. An alignment sensor 1 28 is fixedly installed on the outer wall of the embedded driven box 12 away from the embedded driven shaft 18. An alignment sensor 29 is fixedly installed on the inner wall of the rectangular mounting box 11 near the alignment sensor 1 28. When the alignment sensor 1 28 and the alignment sensor 29 are aligned, a home position reminder signal is triggered to remind the user to return the device to the initial position.

[0025] The facial scanning mechanism 200 includes two longitudinal steel pipe bases 201, which are respectively fixedly installed on both sides of the corresponding transverse steel pipe base 1. The same transverse steel pipe base 3 202 is fixedly installed on the two longitudinal steel pipe bases 201. A display bracket 203 is fixedly installed on the top of the transverse steel pipe base 3 202. A first display 204 is detachably installed on the display bracket 203 by screws. The first display 204 has a built-in facial scanning and recognition system. The first display 204 has a built-in camera for capturing the user's facial images. The facial scanning and recognition system can extract facial fatigue features, determine fatigue level, and provide graded warnings to avoid shock caused by overtraining.

[0026] The leg-hooking mechanism 300 includes a rectangular pipe 301, which is fixedly installed on the top of the corresponding transverse steel pipe base 1. A U-shaped pipe 302 is installed on the rectangular pipe 301 by bolts. A transverse connecting shaft 303 is fixedly installed on both sides of the U-shaped pipe 302. A circular protective sleeve 304 is rotatably sleeved on the transverse connecting shaft 303. The circular protective sleeve 304 is used to reduce friction damage between the leg and the transverse connecting shaft 303.

[0027] The facial scanning and recognition system includes an image acquisition module, an image preprocessing module, a facial feature extraction module, a fatigue level determination module, a graded early warning module, and a data storage module. The image acquisition module is a camera built into the first display 204, used to acquire facial images of the user during the training process in real time. The image preprocessing module is used to perform noise reduction, grayscale conversion, and face region cropping on the acquired facial images. The facial feature extraction module is used to extract fatigue feature parameters such as eye closure degree, corner of mouth drooping degree, and proportion of facial flushing area from the preprocessed image; The fatigue level determination module calculates fatigue characteristic parameters using a weighted algorithm to determine the user's fatigue level. The graded early warning module triggers corresponding audible and visual early warning signals based on the fatigue level. The data storage module is used to store facial images, feature parameters, fatigue levels, and early warning records.

[0028] The weighted algorithm formula for the fatigue level determination module is as follows: ; Where F is the overall fatigue value, E is the degree of eye closure (0≤E≤1), M is the degree of drooping of the corner of the mouth (0≤M≤1), R is the proportion of facial flushing area (0≤R≤1), α, β, and γ are weighting coefficients, and α+β+γ=1, α=0.5, β=0.2, and γ=0.3; Based on the comprehensive fatigue value, fatigue levels are divided into three levels: F < 0.3 is the normal level, 0.3 ≤ F < 0.7 is the mild fatigue level, and F ≥ 0.7 is the severe fatigue level. The electrical product models involved in this invention are as follows: The small DC geared motor 22 is model 60BYG250B, and its purpose is to drive gear and rack transmission to realize the switching of push / pull training mode. The parameters of the small DC geared motor 22 are power 120W, speed 100rpm, and it is suitable for fitness equipment. The alignment sensor 28 and alignment sensor 29 are both model E3Z-D61, and their purpose is: equipment reset detection, triggering in-situ reminder signal. The specific parameters are diffuse reflection photoelectric alignment sensor, NPN output, detection distance 5-10mm. The industrial touch display 204, model AM-101T, is used to display warning information, reset prompts, and capture facial images. Its specific parameters are 10.1 inches, a built-in 2-megapixel camera, and it is compatible with embedded systems. The microcontroller is an STM32F103C8T6, used as the core of an electronic control system for control mode switching, fatigue warning, and reset feedback; its specific parameters are a 32-bit microcontroller with an ARM architecture. The image acquisition camera model is OV7670. Its purpose is to acquire facial images of users for analysis by the fatigue monitoring system. Specific parameters include a CMOS image alignment sensor with a resolution of 640×480, and it is compatible with embedded devices. The model of the sound and light warning module is LTE-1101J. Its purpose is to trigger corresponding sound and light warnings according to the fatigue level. The specific parameters are an integrated sound and light alarm, which can switch between yellow / red lights and high and low frequency prompt sounds, and is suitable for small devices. Note: Unlabeled electrical control components are standard, mature parts of this device. Their structure and working principle are well known to those skilled in the art, therefore no additional labeling is required, and this does not affect the integrity of this technical solution or the prerequisites for its implementation. Equipment installation: Place the equipment on a flat, hard surface and check the connection of each steel pipe base, bolt, and weld to ensure that there is no looseness or detachment; Electrical control debugging: Connect the equipment power supply and debug the small DC geared motor, alignment sensor one, alignment sensor two, first display and facial scanning recognition system to ensure that each electrical control component is working properly; Consumable preparation: Based on the user's arm strength level, install the corresponding number of C-shaped counterweights on the counterweight placement rod.

[0029] Example 1: Assembly and basic debugging of arm strength training mechanism

[0030] Two transverse steel pipe bases 1 and two longitudinal steel pipe bases 2 are fixed by welding to form the main base of the equipment. The transverse steel pipe base 3 is welded between the two longitudinal steel pipe bases 2 to serve as the supporting foundation for the training seat 6. The seat support 4 is welded to the top of the horizontal steel pipe base 3. The L-shaped seat frame 5 is bolted to the seat support 4. The training seat 6 is installed on the top of the L-shaped seat frame 5 and the seat angle can be adjusted as needed. The inclined bracket 7 is welded to the top of the horizontal steel pipe base 1. The rectangular auxiliary tube 1 8 and the rectangular auxiliary tube 2 9 are connected to the inclined bracket 7 and the seat support 4 by bolts in sequence to form the support frame of the rectangular robotic arm 101. The rectangular robotic arm 101 is connected as a whole by auxiliary short shaft 102 and auxiliary short shaft 2 103. The training handle 105 is welded to the inside of the rectangular robotic arm 101. The embedded limiting slider 107 is slidably installed in the embedded connecting groove 106 of the rectangular robotic arm 101. One end of the hinge rod 108 is hinged to the embedded limiting slider 107, and the other end is rotatably connected to the rectangular auxiliary tube 8 through the riveting rod 109. The adjustment ensures that the embedded limiting slider 107 can slide smoothly along the embedded slider mounting axis and that the hinge rod 108 can swing flexibly.

[0031] Example 2: Assembly and Mode Switching Operation of Arm Force Switching Mechanism

[0032] A rectangular mounting box 11 is welded to one side of a horizontal steel pipe base 1. An embedded driven box 12 is slidably installed inside the rectangular mounting box 11 to ensure that it can move smoothly up and down in the vertical direction. A circular driven rod 13 is welded to the top of the embedded driven box 12. The circular sleeve 14 at the top of the rod is rotatably fitted onto the auxiliary short shaft 102. The adjustment ensures that the swing of the rectangular robotic arm 101 can drive the circular driven rod 13 and the embedded driven box 12 to move up and down. The counterweight placement rod 16 is slidably installed in the embedded driven box 12, and after the C-shaped counterweight 17 is fitted, it is limited by the circular limit block 26; the embedded driven shaft 18 is slidably installed in the rectangular mounting box 11, and its bottom end is connected to the spring pressure plate 19 and the telescopic spring 20 in sequence. The circular limit block 27 is fitted on the embedded driven shaft 18 and contacts the bottom of the embedded driven box 12. The small DC geared motor 22 is bolted to the inner wall of the embedded driven box 12. The circular gear 23 is fixed to the output shaft of the small DC geared motor 22. Two rectangular racks 24 mesh with the circular gear 23. The rack limit rod 2401 passes through the loop-shaped limit seat 2402 and is fixed to the rectangular rack 24. The cylindrical clamp 25 is welded to the rectangular rack 24. The adjustment ensures that the rotation of the small DC geared motor 22 can drive the two rectangular racks 24 to move towards each other. Thrust mode switching: The small DC geared motor 22 is started in the forward direction. The output shaft drives the circular gear 23 to rotate clockwise. The two rectangular racks 24 move towards each other. The upper cylindrical locking rod 25 is inserted into the circular locking hole 21 of the counterweight placement rod 16. The lower cylindrical locking rod 25 is disengaged from the circular locking hole 21 of the embedded driven shaft 18, thus completing the thrust training mode switching. Pull mode switching: The small DC geared motor 22 is started in reverse, and the output shaft drives the circular gear 23 to rotate counterclockwise. The two rectangular racks 24 move towards each other. The lower cylindrical locking rod 25 is inserted into the circular locking hole 21 of the embedded driven shaft 18, and the upper cylindrical locking rod 25 is disengaged from the circular locking hole 21 of the counterweight placement rod 16, thus completing the pull training mode switching.

[0033] Example 3: Assembly and height adjustment of the leg hook mechanism Rectangular pipe 301 is welded to the top of horizontal steel pipe base 1. C-shaped pipe 302 is installed on rectangular pipe 301 by bolts. The adjustment ensures that C-shaped pipe 302 can be vertically raised and lowered along rectangular pipe 301. The transverse connecting shaft 303 is welded to both sides of the U-shaped pipe 302, and the circular protective sleeve 304 is rotatably sleeved on the transverse connecting shaft 303 to ensure that it can rotate flexibly. Height adjustment: Based on the user's height and leg length, loosen the fixing bolts on the rectangular pipe 301, move the chamfered pipe 302 up and down to the appropriate height. When the user sits on the training seat 6, their legs can be naturally hooked onto the horizontal connecting shaft 303. Tighten the bolts to complete the fixation. The circular protective sleeve 304 contacts the legs to reduce friction damage.

[0034] Example 4: Assembly of the facial scanning mechanism and debugging of the facial scanning recognition system Two longitudinal steel pipe bases 201 are welded to both sides of the transverse steel pipe base 1, and the transverse steel pipe base 3 202 is welded to the top of the longitudinal steel pipe base 201. The monitor bracket 203 is bolted to the transverse steel pipe base 3 202. The first monitor 204 is mounted on the monitor bracket 203 with screws. The angle of the first monitor 204 is adjusted to ensure that the camera built into the first monitor 204 can clearly capture the user's facial image. Facial scanning and recognition system debugging: Start the first display 204, open the facial scanning and recognition system, and debug each module in turn: Image acquisition module: The camera built into the first display 204 captures facial images in real time to ensure clear and unobstructed images; Image preprocessing module: performs noise reduction, grayscale conversion, face cropping, and background interference removal on the acquired images; Facial feature extraction module: Extracts eye closure degree E, corner of mouth drooping degree M, and facial flushing area ratio R to ensure accurate parameter extraction; Fatigue level determination module: Load the weighted algorithm formula F=0.5E+0.2M+0.3R and debug the accuracy of the formula calculation; Graded early warning module: Set early warning thresholds and adjust the early warning signals of the audible and visual early warning modules corresponding to different fatigue levels; Data storage module: Automatic storage function for debugging images, parameters, and fatigue levels.

[0035] Example 5: Debugging and Use of Reset Feedback Mechanism Alignment sensor 1 28 is bolted to the outer wall of the embedded slave box 12, and alignment sensor 2 29 is bolted to the inner wall of the rectangular mounting box 11. The two are installed in corresponding positions. The adjustment ensures that when the embedded slave box 12 returns to the initial position, alignment sensor 1 28 and alignment sensor 2 29 are precisely aligned. After alignment sensor 1 28 and alignment sensor 2 29 are aligned, an audible and visual in-situ reminder signal is triggered, and the first display 204 simultaneously displays "Device reset, training can begin"; if not aligned, there is no reminder signal, and the first display 204 displays "Device not reset, do not train," ensuring that the user begins training after the device is reset. V. Working Principle and Four Beneficial Effects The core working principle of the sports arm strength training equipment of this invention is the combination of mechanical transmission and intelligent electronic control. The arm strength training mechanism realizes the mechanical transmission of arm strength, the arm strength switching mechanism realizes precise electric switching between push and pull modes, the leg clamping mechanism ensures reliable leg fixation, the facial scanning recognition system realizes accurate fatigue monitoring and graded early warning, and the reset feedback mechanism realizes intelligent on-site reminders. All parts work together to achieve safe, efficient, and suitable arm strength training. Specifically, it consists of five core parts: mechanical transmission principle, mode switching principle, leg fixation principle, facial fatigue monitoring principle, and reset feedback principle. Mechanical transmission principle The user sits on the training chair 6, grips the training handle 105, and exerts force to drive the rectangular robotic arm 101 to swing around the rotation point of the riveting rod 109 and the rectangular auxiliary tube 8. When the rectangular robotic arm 101 swings, the embedded limit slider 107 slides along the slider mounting shaft in the embedded connecting groove 106 of the rectangular robotic arm 101. At the same time, the hinge rod 108 performs hinge motion with the swing of the rectangular robotic arm 101, converting the user's arm force into the regular swing of the rectangular robotic arm 101. This, in turn, drives the circular sleeve 14 and the circular driven rod 13 to move through the auxiliary short shaft 102, realizing the transmission connection between the arm force and the mechanical components.

[0036] Arm strength mode switching principle The upper cylindrical lever 25 engages with the circular locking hole 21 of the counterweight placement lever 16, while the lower cylindrical lever 25 disengages from the circular locking hole 21 of the embedded driven shaft 18. When the user pushes the training handle 105 upward, the rectangular robotic arm 101 drives the circular driven lever 13 downward, pushing the embedded driven box 12 downward. The circular limit block 27 then presses down on the embedded driven shaft 18 and the spring pressure plate 19, causing the telescopic spring 20 to compress and deform. The reaction force of the telescopic spring 20 forms the training resistance, realizing arm strength pushing force training. The C-shaped counterweight 17 can increase the resistance value of the pushing force training. The lower cylindrical lever 25 engages with the circular locking hole 21 of the embedded driven shaft 18, while the upper cylindrical lever 25 disengages from the circular locking hole 21 of the counterweight placement rod 16. When the user pulls down the training handle 105, the rectangular robotic arm 101 drives the circular driven rod 13 to move upward, pulling the embedded driven box 12 upward. The circular limit block 26 then pulls the counterweight placement rod 16 upward, and the gravity of the C-shaped counterweight 17 forms training resistance, thus achieving arm strength and pulling force training.

[0037] The leg fixation principle: The I-shaped tube 302 of the leg hooking mechanism 300 is adjusted vertically via bolts to accommodate the leg size of users of different heights. When the user sits on the training seat 6, the legs are hooked onto the horizontal connecting shaft 303. The circular protective sleeve 304 contacts the skin of the leg and rotates with slight leg movements, reducing friction damage between the metal parts and the skin. After the legs are reliably fixed, it prevents the legs from sliding or shifting during training, ensuring that the user's arm strength is concentrated and improving training efficiency.

[0038] The principle of facial fatigue monitoring: The facial scanning and recognition system achieves accurate monitoring and graded early warning of facial fatigue through multi-module collaboration and algorithm judgment. The core steps are as follows: The camera built into the first display 204 captures the user's facial images in real time during the training process at a rate of 1 frame per second. Gaussian noise reduction is applied to the acquired color images to remove noise, grayscale conversion is performed to reduce the amount of data, and face regions are cropped to remove background interference, resulting in grayscale images containing only faces. The fatigue feature parameters in grayscale images are extracted using image recognition algorithms: eye closure degree E (eye closure area / total eye area), mouth corner drooping degree M (mouth corner drooping distance / vertical length of face), and facial flushing area ratio R (flushed area / total face area). Substitute the extracted feature parameters into the weighted algorithm formula F=0.5E+0.2M+0.3R to calculate the fatigue comprehensive value F, and determine the fatigue level based on the F value: Normal level (F < 0.3): The user's face shows no obvious signs of fatigue and can train normally; Mild fatigue level (0.3 ≤ F < 0.7): The user shows signs of fatigue such as slightly closed eyes and slightly drooping corners of the mouth and needs to slow down the training pace appropriately. Severe fatigue level (F≥0.7): Users exhibit severe fatigue characteristics such as tightly closed eyes, visibly drooping corners of the mouth, and facial flushing, and must immediately stop training; Tiered warning: The warning signal of the corresponding sound and light warning module is triggered according to the fatigue level: no warning for normal level, yellow light and low frequency prompt sound for mild fatigue level, and red light and high frequency alarm sound for severe fatigue level. The warning text and rest prompt are displayed simultaneously on the first display 204. Data storage: The system automatically stores facial images, feature parameters, fatigue comprehensive values, fatigue levels, and early warning records, making it convenient for users to view fatigue changes during the training process.

[0039] The reset feedback principle is based on the fact that the first alignment sensor 28 moves with the up-and-down movement of the embedded driven box 12, while the second alignment sensor 29 is fixed in the initial position of the rectangular mounting box 11. After the arm force mode is switched, the embedded driven box 12 returns to its initial position under the reset force of the telescopic spring 20 or the gravity of the C-shaped counterweight 17. At this time, the first alignment sensor 28 and the second alignment sensor 29 are precisely aligned, triggering an electrical signal and converting it into an audible and visual in-situ reminder signal. The first display 204 simultaneously displays a reset prompt. If the embedded driven box 12 does not return to its initial position and the two are not aligned, there is no reminder signal, and the first display 204 displays a non-reset prompt, ensuring that the user starts training after the equipment transmission components are reset, thus avoiding damage to mechanical components due to abnormal transmission.

[0040] The electronic control system of this invention uses a microcontroller as its core, a conventional and mature component (not labeled), and connects to a small DC geared motor, two alignment sensors, a display, a facial scanning recognition system, and an audible and visual warning module. It achieves integrated electronic control for mode switching, reset detection feedback, and fatigue monitoring and early warning. The core electronic control principle and feedback logic are as follows: Mode switching control logic: The user sends a push / pull mode switching command to the microcontroller via the control button. After receiving the command, the microcontroller sends a forward / reverse electrical signal to the small DC geared motor. The small DC geared motor drives the gear and rack transmission to achieve the engagement / disengagement of the cylindrical clamp and the circular clamp hole. After the transmission is completed, the microcontroller determines whether the small DC geared motor has stopped by detecting the current. If it stops, the mode switching is determined to be completed and the display shows the corresponding mode. Otherwise, a motor fault warning is triggered. Reset detection feedback logic: Two alignment sensors transmit position signals to the microcontroller in real time. If the two are aligned, the microcontroller determines that the device is reset, triggers the in-situ reminder signal, and displays a reset prompt on the display. If the two are misaligned, the microcontroller determines that the device is not reset, prohibits the sending of the training start signal, and displays a non-reset prompt on the display until the two are aligned. Fatigue monitoring and early warning logic: The facial scanning and recognition system transmits the extracted feature parameters and calculated comprehensive fatigue value to the microcontroller in real time. The microcontroller determines the fatigue level based on the F value and sends corresponding early warning signals to the sound and light early warning module and the display, triggering graded sound and light early warnings and text prompts. If it is determined to be severe fatigue, the microcontroller can selectively cut off the power transmission of the equipment (optional function) to force the user to stop training.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the invention. In other related technical fields, the scope of the invention is defined by the appended claims and their equivalents, and they are similarly included within the scope of patent protection of the invention.

Claims

1. An arm strength training device for sports, characterized in that It includes an arm strength training mechanism (100), a face scanning mechanism (200), a leg hooking mechanism (300), and an arm strength switching mechanism; The arm strength training mechanism (100) is the basic equipment of the arm strength training device, which is used to provide users with a training support carrier and a mechanical transmission basis for arm strength generation; The facial scanning mechanism (200) is used to scan and identify human facial images and analyze them using algorithms to determine the fatigue level during user training, and promptly remind trainees to rest to avoid overtraining and shock. The leg hooking mechanism (300) is used to hook and fix the user's legs during training to prevent leg movement from affecting the training effect. The arm strength switching mechanism is used to achieve precise switching between two arm strength training modes: pushing and pulling, to meet the diverse training needs of users. The arm strength training mechanism (100) includes two horizontal steel pipe bases (1), two vertical steel pipe bases (2) are fixedly installed between the two horizontal steel pipe bases (1), and a horizontal steel pipe base (3) is fixedly installed between the two vertical steel pipe bases (2). A seat support (4) is fixedly installed on the top of the horizontal steel pipe base (3). An L-shaped seat frame (5) is fixedly installed on the left side of the seat support (4). A training seat (6) is fixedly installed on the top of the L-shaped seat frame (5). An inclined bracket (7) is fixedly installed on the top of the corresponding horizontal steel pipe base (1). A rectangular auxiliary tube (8) is fixedly installed on the top of the inclined bracket (7). A rectangular auxiliary tube (9) is fixedly installed on the side of the rectangular auxiliary tube (8) close to the training seat (6). The side of the rectangular auxiliary tube (9) away from the rectangular auxiliary tube (8) is fixedly connected to the seat support (4).

2. The sports arm strength training device according to claim 1, characterized in that: The arm strength training mechanism (100) also includes two rectangular robotic arms (101). An auxiliary short shaft one (102) and an auxiliary short shaft two (103) are provided between the two rectangular robotic arms (101). The two ends of the auxiliary short shaft one (102) are fixedly connected to the two rectangular robotic arms (101), and the two ends of the auxiliary short shaft two (103) are fixedly connected to the two rectangular robotic arms (101) respectively. Training handles (105) are fixedly installed on the inner side of the two rectangular robotic arms (101). An embedded connecting groove (106) is provided at the bottom of the rectangular robotic arms (101). An embedded limiting slider (107) is slidably installed in the embedded connecting groove (106). A hinge rod (108) is hinged on the embedded limiting slider (107). A riveting rod (109) is fixedly installed on the side of the hinge rod (108) near the rectangular auxiliary tube (8). The end of the riveting rod (109) away from the hinge rod (108) is rotatably installed on the rectangular auxiliary tube (8). The same embedded slider mounting shaft is fixedly installed on the inner walls of both sides of the embedded connecting groove (106). The embedded limiting slider (107) is slidably sleeved on the corresponding embedded slider mounting shaft.

3. The sports arm strength training device according to claim 2, characterized in that: The arm force switching mechanism includes a rectangular mounting box (11) fixedly installed on one side of the corresponding transverse steel pipe base (1). An embedded driven box (12) that moves in the up and down direction is slidably installed inside the rectangular mounting box (11). A circular driven rod (13) is fixedly installed on the top of the embedded driven box (12). The top of the circular driven rod (13) extends to the outside of the rectangular mounting box (11) and is hinged to a circular sleeve (14). The circular sleeve (14) is rotatably sleeved on the auxiliary short shaft (102). Two driven rod connecting holes (15) are opened on the top of the embedded driven box (12). The embedded driven box (12) slides inside the rectangular mounting box (12). A counterweight placement rod (16) is installed, and multiple C-shaped counterweights (17) are sleeved on the counterweight placement rod (16). The top end of the counterweight placement rod (16) extends into the embedded driven box (12). An embedded driven shaft (18) is slidably installed in the rectangular mounting box (11). The top end of the embedded driven shaft (18) extends into the embedded driven box (12). A spring pressure plate (19) is fixedly installed at the bottom end of the embedded driven shaft (18). A telescopic spring (20) is fixedly installed at the bottom of the spring pressure plate (19). The bottom end of the telescopic spring (20) is fixedly connected to the bottom inner wall of the rectangular mounting box (11).

4. The sports arm strength training device according to claim 3, characterized in that: The arm force switching mechanism also includes two circular locking holes (21). The two circular locking holes (21) are respectively opened on the counterweight placement rod (16) and the embedded driven shaft (18). A small DC geared motor (22) is fixedly installed on the inner wall of the embedded driven box (12) near the training seat (6). A circular gear (23) is fixed on the output shaft of the small DC geared motor (22). Two rectangular racks (24) mesh on the circular gear (23), and the two rectangular racks (24) move in opposite directions. A cylindrical locking rod (25) is fixedly installed on the rectangular rack (24), and the cylindrical locking rod (25) is adapted to the corresponding circular locking hole (21). The forward start of the small DC geared motor (22) enables the upper cylindrical clamp (25) to engage with the corresponding circular clamp (21) and the lower cylindrical clamp (25) to disengage from the corresponding circular clamp (21), switching to the thrust training mode; the reverse start of the small DC geared motor (22) enables the lower cylindrical clamp (25) to engage with the corresponding circular clamp (21) and the upper cylindrical clamp (25) to disengage from the corresponding circular clamp (21), switching to the tension training mode.

5. The sports arm strength training device according to claim 4, characterized in that: Two loop-shaped limiting seats (2402) are fixedly installed on the inner wall of the rectangular mounting box (11) away from the training seat (6). The two loop-shaped limiting seats (2402) are arranged in an upper and lower position. A rack limiting rod (2401) is slidably installed on the loop-shaped limiting seat (2402). The rack limiting rod (2401) is fixedly connected to the corresponding rectangular rack (24). The rack limiting rod (2401) is used to limit the movement direction of the rectangular rack (24) and prevent it from deviating and falling off.

6. The sports arm strength training device according to claim 4, characterized in that: The arm force switching mechanism also includes two circular limiting blocks: a first circular limiting block (26) and a second circular limiting block (27). The first circular limiting block (26) is fixedly sleeved on the counterweight placement rod (16) and is located inside the embedded driven box (12). The first circular limiting block (26) is in contact with the bottom inner wall of the embedded driven box (12). The second circular limiting block (27) is fixedly sleeved on the embedded driven shaft (18) and is located inside the driven shaft (18). The embedded driven box (12) is located outside and in contact with the bottom of the embedded driven box (12). An alignment sensor (28) is fixedly installed on the outer wall of the embedded driven shaft (12) away from the embedded driven shaft (18). An alignment sensor (29) is fixedly installed on the inner wall of the rectangular mounting box (11) near the alignment sensor (28). When the alignment sensor (28) and the alignment sensor (29) are aligned, an in-situ reminder signal is triggered to remind the user to restore the device to its initial position.

7. The sports arm strength training device according to claim 1, characterized in that: The facial scanning mechanism (200) includes two longitudinal steel pipe bases (201), which are fixedly installed on both sides of the corresponding transverse steel pipe base (1). The same transverse steel pipe base (202) is fixedly installed on the two longitudinal steel pipe bases (201). A display bracket (203) is fixedly installed on the top of the transverse steel pipe base (202). A first display (204) is detachably installed on the display bracket (203) by screws. The first display (204) has a built-in facial scanning and recognition system. The first display (204) has a built-in camera for collecting facial images of the user. The facial scanning and recognition system can extract facial fatigue features, determine fatigue level and provide graded warnings to avoid shock caused by overtraining.

8. The sports arm strength training device according to claim 1, characterized in that: The leg hooking mechanism (300) includes a rectangular pipe (301), which is fixedly installed on the top of the corresponding transverse steel pipe base (1). A U-shaped pipe (302) is installed on the rectangular pipe (301) by bolts. A transverse connecting shaft (303) is fixedly installed on both sides of the U-shaped pipe (302). A circular protective sleeve (304) is rotatably sleeved on the transverse connecting shaft (303). The circular protective sleeve (304) is used to reduce friction damage between the leg and the transverse connecting shaft (303).

9. The sports arm strength training device according to claim 7, characterized in that: The facial scanning and recognition system includes an image acquisition module, an image preprocessing module, a facial feature extraction module, a fatigue level determination module, a graded early warning module, and a data storage module. The image acquisition module is a camera built into the first display (204), used to acquire facial images of the user during the training process in real time; The image preprocessing module is used to perform noise reduction, grayscale conversion, and face region cropping on the acquired facial images. The facial feature extraction module is used to extract fatigue feature parameters such as eye closure degree, corner of mouth drooping degree, and proportion of facial flushing area from the preprocessed image; The fatigue level determination module calculates fatigue characteristic parameters using a weighted algorithm to determine the user's fatigue level. The graded early warning module triggers corresponding audible and visual early warning signals based on the fatigue level. The data storage module is used to store facial images, feature parameters, fatigue levels, and early warning records.

10. The sports arm strength training device according to claim 9, characterized in that: The weighted algorithm formula for the fatigue level determination module is as follows: ； Where F is the overall fatigue value, E is the degree of eye closure (0≤E≤1), M is the degree of drooping of the corner of the mouth (0≤M≤1), R is the proportion of facial flushing area (0≤R≤1), α, β, and γ are weighting coefficients, and α+β+γ=1, α=0.5, β=0.2, and γ=0.3; Based on the comprehensive fatigue value, the fatigue level is divided into three levels: F < 0.3 is the normal level, 0.3 ≤ F < 0.7 is the mild fatigue level, and F ≥ 0.7 is the severe fatigue level.

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