Leg exerciser for aerobics training
By designing dynamically adjustable aerobics training equipment, the problem of fixed resistance in traditional equipment being difficult to match the muscle exertion requirements has been solved. The resistance is dynamically adjusted according to the joint angle, which improves the training effect and stability.
Patent Information
- Application Number
- CN202511321041.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-16
- Publication Date
- 2025-11-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional aerobics training equipment provides fixed resistance in seated leg flexion and extension exercises, which is difficult to match the actual force exertion needs of the muscles, resulting in an inability to effectively reflect physiological characteristics.
A leg exercise device for aerobics training was designed. The resistance of the elastic band is dynamically adjusted through a telescopic shell, transmission wheel and gear system, and the position of the fixed roller and connecting rod is adjusted by a motor to achieve dynamic matching of resistance with changes in joint angle.
It achieves dynamic adjustment of resistance as the joint angle changes, which is closer to the muscle exertion needs, improves training effect, and enhances training stability and adaptability.
Smart Images
Figure CN120960731A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of leg exercise equipment technology, and more particularly to a leg exercise equipment for aerobics training. Background Technology
[0002] In aerobics training, leg training equipment enhances lower limb strength and coordination through diverse functions. Common equipment such as resistance bands, balance mats, resistance sleds, and step trainers can specifically improve the endurance of the quadriceps, hamstrings, and glutes, while also enhancing knee joint stability and ankle flexibility. Resistance bands provide progressive resistance, suitable for warm-up and muscle activation; step trainers simulate jumping movements, effectively training cardiovascular endurance and explosive power; balance mats stimulate core muscle groups to work together through an unstable interface, preventing sports injuries. The combination of these equipment can comprehensively shape leg lines, improve the range and expressiveness of aerobics movements, adapt to the needs of different training stages, and help practitioners achieve balanced development of strength, flexibility, and rhythm.
[0003] In practical use, existing devices mostly provide fixed resistance in seated leg flexion and extension exercises. Muscle force output changes with the joint angle, but fixed resistance is difficult to match this physiological characteristic and is difficult to closely match the actual force exertion needs of the muscles. Therefore, a leg exercise device for aerobics training is proposed. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies, where traditional devices in seated leg flexion and extension mostly provide fixed resistance, and the muscle force output changes with the joint angle. However, the fixed resistance is difficult to match this physiological characteristic and is difficult to closely match the actual force exertion needs of the muscles. Therefore, this invention proposes a leg exercise device for aerobics training.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A leg exercise device for aerobics includes a base. A telescopic housing is rotatably connected to the upper part of the base. A fixed roller is located at the lower part of the telescopic housing. A first connecting rod is rotatably connected to one side of the fixed roller. A second connecting rod is rotatably connected to the first connecting rod. An elastic band is rotatably connected to the second connecting rod. A first transmission wheel is fixedly connected to the upper part of the second connecting rod. A transmission belt is driven by the first transmission wheel. A second transmission wheel is driven by the transmission belt. A first gear is fixedly connected to the second transmission wheel. A second gear meshes with the first gear. A resistance adjustment housing is rotatably connected to the lower part of the second gear. The resistance adjustment housing is fixedly connected to the base. A third gear is fixedly connected to the second gear. A fourth gear meshes with the third gear. Third threaded rods are symmetrically fixedly connected to both sides of the fourth gear. Sliding rods are threadedly connected to the third threaded rods.
[0006] During the leg flexion and extension movement of a bodybuilder, the fixed roller rotates upwards, which in turn drives the second connecting rod to rotate, causing the elastic band to stretch and contract, providing resistance for the flexion and extension movement. Simultaneously, the rotation of the second connecting rod also drives the first transmission wheel to rotate, which in turn drives the second gear to rotate. The rotation of the second gear causes the clamps on both sides to close inwards, clamping the elastic band. This ensures that the resistance provided by the elastic band increases synchronously in the latter half of the leg flexion and extension movement, conforming to the force exertion requirements of the leg muscles. The clamps are provided with friction surfaces to prevent slippage during clamping.
[0007] The above technical solution further includes: The elastic band is fixedly connected to an elastic band housing at the end away from the second connecting rod. The elastic band housing is fixedly connected to the device base. A fixing rod is threadedly connected to the lower part of the elastic band housing. A pressure plate is rotatably connected to the fixing rod. The elastic band is coiled inside the elastic band housing. The length of the elastic band can be adjusted by pulling the elastic band.
[0008] A slide rod is fixedly connected inside the resistance adjustment housing, and clamps are slidably connected to both sides of the slide rod.
[0009] An adjustment housing is fixedly connected to the lower part of the fixed roller. A second motor is fixedly connected inside the adjustment housing. An adjustment component is provided at the output end of the second motor. A leather soft pad is provided on the outside of the fixed roller to prevent discomfort to personnel during movement.
[0010] The adjustment assembly includes a first threaded rod disposed at the output end of the second motor, the first threaded rod being threadedly connected to a connecting block, the connecting block being fixedly connected to a movable roller, and a fixed roller being slidably connected to the end of the connecting block away from the movable roller.
[0011] The upper part of the connecting block is rotatably connected to two rotating wheels, and a limit rod is provided in the middle of the two rotating wheels. The limit rod can limit the movement of the connecting block and improve the stability of the connecting block movement.
[0012] The telescopic housing is equipped with a first motor on its upper part, and a telescopic component is provided at the output end of the first motor. The base of the device is equipped with an anti-collision head on its upper part, which can buffer the telescopic housing.
[0013] The telescopic assembly includes a second threaded rod at the output end of a first motor, an adjusting rod threadedly connected to the second threaded rod, the adjusting rod being slidably connected to the telescopic housing, a fixed roller being fixedly connected to the bottom of the adjusting rod, and a slide rail being provided inside the telescopic housing, through which the adjusting rod can be slidably connected.
[0014] A backrest is fixedly connected to the upper part of the device base, a seat cushion is fixedly connected to the front end of the backrest, and handles are fixedly connected to both sides of the seat cushion.
[0015] The present invention has the following beneficial effects: 9. In this invention, during the leg flexion and extension movements of a bodybuilder, the flexion and extension can drive the fixed roller to rotate. The rotation of the fixed roller drives the second connecting rod to rotate, thereby causing the elastic band to stretch and contract, thus providing resistance for the flexion and extension process. At the same time, the rotation of the second connecting rod can also drive the second transmission wheel to rotate. The rotation of the second transmission wheel drives the third gear to rotate. The rotation of the third gear can drive the clamps on both sides to close inward, thereby clamping the elastic band and reducing the length of the elastic band that can stretch and contract, thereby increasing the tensile resistance of the elastic band. This dynamically increases the resistance in the right rear half of the flexion and extension movement, making it easier to match the physiological characteristics of muscle force output changing with joint angle, and more closely close to the actual force exertion needs of the muscles.
[0016] 10. In this invention, starting the first motor can drive the adjusting rod to move, thereby adjusting the position of the fixed roller. This allows the device to be flexibly adjusted according to the athlete's leg length, facilitating better power exertion during training. Starting the second motor can also drive the connecting block to move, thereby moving the movable roller closer to the fixed roller, enabling the device to adjust the appropriate spacing according to the athlete's leg thickness, thus improving stability during exercise. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a leg exercise device for aerobics training proposed in this invention; Figure 2 This is a side view of the overall structure of the device in this invention; Figure 3 This is a schematic diagram of the telescopic shell connection relationship in this invention; Figure 4 This is a schematic diagram of the internal structure of the telescopic shell in this invention; Figure 5 This is a schematic diagram of the connection relationship of the adjusting housing in this invention; Figure 6 This is a schematic diagram of the internal structure of the device base in this invention; Figure 7 This is a schematic diagram of the internal structure of the elastic band shell in this invention; Figure 8 This is a schematic diagram of the connection relationship of the resistance adjustment housing in this invention; Figure 9 This is a schematic diagram of the internal structure of the resistance regulating housing in this invention.
[0018] In the diagram: 1. Device base; 2. Backrest; 3. Seat cushion; 4. Handle; 5. Telescopic housing; 6. Adjusting rod; 7. Fixed roller; 8. Movable roller; 9. Elastic band housing; 10. Elastic band; 11. Resistance adjusting housing; 12. Clamping plate; 13. First motor; 14. First connecting rod; 15. Second connecting rod; 16. Adjusting housing; 17. Connecting block; 18. Second motor; 19. First threaded rod; 20. Limiting rod; 21. Rotating wheel; 22. Second threaded rod; 23. First transmission wheel; 24. Transmission belt; 25. Second transmission wheel; 26. Pressure plate; 27. Fixed rod; 28. First gear; 29. Second gear; 30. Third threaded rod; 31. Sliding rod; 32. Third gear; 33. Fourth gear. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Example 1 like Figures 1-9 As shown, an aerobics training leg exercise device includes a device base 1. A telescopic housing 5 is rotatably connected to the upper part of the device base 1. A fixed roller 7 is provided at the lower part of the telescopic housing 5. A first connecting rod 14 is rotatably connected to one side of the fixed roller 7. A second connecting rod 15 is rotatably connected to the first connecting rod 14. An elastic band 10 is rotatably connected to the second connecting rod 15. A first transmission wheel 23 is fixedly connected to the upper part of the second connecting rod 15. A transmission belt 24 is driven by the first transmission wheel 23. A second transmission wheel 25 is driven by the transmission belt 24. A first gear 28 is fixedly connected to the second transmission wheel 25. A second gear 29 is meshed with the first gear 28. A resistance adjustment housing 11 is rotatably connected to the lower part of the second gear 29. The resistance adjustment housing 11 is fixedly connected to the device base 1. A third gear 32 is fixedly connected to the second gear 29. A fourth gear 33 is meshed with the third gear 32. Third threaded rods 30 are symmetrically fixedly connected to both sides of the fourth gear 33. A slide rod 31 is threadedly connected to the third threaded rod 30.
[0021] During the leg flexion and extension movement of the bodybuilder, the fixed roller 7 rotates upward, which in turn drives the second connecting rod 15 to rotate, thereby causing the elastic band 10 to stretch and contract, providing resistance for the flexion and extension movement. During the flexion and extension movement, the rotation of the second connecting rod 15 also synchronously drives the first transmission wheel 23 to rotate, which in turn drives the second gear 29 to rotate. The rotation of the second gear 29 causes the clamps 12 on both the upper and lower sides to close inward and clamp the elastic band 10, so that the resistance provided by the elastic band 10 increases synchronously in the latter half of the bodybuilder's leg flexion and extension movement, conforming to the force exertion needs of the leg muscles. The surface of the clamps 12 is provided with friction surfaces to prevent slippage during clamping.
[0022] The elastic band 10 is fixedly connected to an elastic band housing 9 at the end away from the second connecting rod 15. The elastic band housing 9 is fixedly connected to the device base 1. A fixing rod 27 is threadedly connected to the lower part of the elastic band housing 9. A pressure plate 26 is rotatably connected to the fixing rod 27. The elastic band 10 is coiled inside the elastic band housing 9. The length of the elastic band 10 can be adjusted by pulling the elastic band 10. A sliding rod 31 is fixedly connected inside the resistance adjustment housing 11. Clamping plates 12 are slidably connected to both sides of the sliding rod 31. A backrest 2 is fixedly connected to the upper part of the device base 1. A seat cushion 3 is fixedly connected to the front end of the backrest 2. Handles 4 are fixedly connected to both sides of the seat cushion 3.
[0023] In this embodiment, when the device is used, the athlete first sits on the upper part of the seat cushion 3, with their back against the backrest 2, and their hands can use the handles 4 for leverage. During the leg flexion and extension movement, the flexion and extension can drive the fixed roller 7 to rotate. The rotation of the fixed roller 7 drives the first connecting rod 14 to rotate, and the rotation of the first connecting rod 14 drives the second connecting rod 15 to rotate. The rotation of the second connecting rod 15 can drive the elastic band 10 to stretch and contract, thereby providing resistance for the flexion and extension process. Moreover, before use, the length of the elastic band 10 can be adjusted by pulling it, thereby adjusting the resistance provided by the elastic band 10 during the flexion and extension process. After the length of the elastic band 10 is fixed, the pressure plate 26 can be moved by rotating the fixed rod 27, thereby pressing and fixing the elastic band 10, so that the length of the elastic band 10 is fixed.
[0024] While the second connecting rod 15 rotates, it can also synchronously drive the first transmission wheel 23 to rotate. The rotation of the first transmission wheel 23 drives the second transmission wheel 25, which is rotated through the transmission belt 24, to rotate. The rotation of the second transmission wheel 25 drives the first gear 28, which is fixedly connected, to rotate. The rotation of the first gear 28 drives the second gear 29, which is meshed with it, to rotate. The rotation of the second gear 29 drives the third gear 32, which is fixedly connected, to rotate. The rotation of the third gear 32 drives the fourth gear 33, which is meshed with it, to rotate. The rotation of the fourth gear 33 drives the third threaded rod 30, which is fixedly connected on both sides, to rotate. This causes the threaded clamping plate 12 to move. During the movement of the clamping plate 12, the sliding resistance adjustment housing 11 ensures the stability of the clamping plate 12. The clamping plates 12 on both sides of the resistance adjustment housing 11 close inward, thereby clamping the elastic band 10 and reducing the length of the elastic band 10 during extension and contraction. This increases the tensile resistance of the elastic band 10, dynamically increasing the resistance in the right rear half of the flexion and extension movement. This makes it easier to match the physiological characteristics of muscle force output changing with joint angle, and is closer to the actual force exertion needs of the muscles.
[0025] Example 2 like Figures 1-9 As shown, an adjusting housing 16 is fixedly connected to the lower part of the fixed roller 7. A second motor 18 is fixedly connected inside the adjusting housing 16. An adjusting component is provided at the output end of the second motor 18. The fixed roller 7 is covered with a leather soft pad to prevent discomfort to personnel during movement. The adjusting component includes a first threaded rod 19 provided at the output end of the second motor 18. A connecting block 17 is threadedly connected to the first threaded rod 19. A movable roller 8 is fixedly connected to the connecting block 17. The fixed roller 7 is slidably connected to the end of the connecting block 17 away from the movable roller 8. Two rotating wheels 21 are rotatably connected to the upper part of the connecting block 17. A limit rod 20 is provided in the middle of the two rotating wheels 21. The limit rod 20 can limit the movement of the connecting block 17 and improve the movement stability of the connecting block 17.
[0026] A first motor 13 is provided on the upper part of the telescopic housing 5. A telescopic component is provided at the output end of the first motor 13. An anti-collision head is provided on the upper part of the device base 1. The anti-collision head can buffer the telescopic housing 5. The telescopic component includes a second threaded rod 22 provided at the output end of the first motor 13. An adjusting rod 6 is threadedly connected to the second threaded rod 22. The adjusting rod 6 is slidably connected to the telescopic housing 5. A fixed roller 7 is fixedly connected to the bottom of the adjusting rod 6. A slide is provided inside the telescopic housing 5. The sliding rod 6 can be slidably connected to the adjusting rod 6 through the slide.
[0027] In this embodiment, starting the first motor 13 drives the second threaded rod 22 to rotate. The rotation of the second threaded rod 22 moves the threaded adjustment rod 6, thereby adjusting the position of the fixed roller 7. This allows the device to be flexibly adjusted according to the athlete's leg length, facilitating better power exertion during training. Starting the second motor 18 also drives the first threaded rod 19 to rotate. The rotation of the first threaded rod 19 moves the threaded connecting block 17. During the movement of the connecting block 17, the upper rotating wheel 21 can rotate synchronously along the limiting rod 20, effectively improving the stability of the connecting block 17 during movement. The movement of the connecting block 17 can drive the fixedly connected movable roller 8 to move closer to the fixed roller 7, allowing the device to adjust the appropriate spacing according to the athlete's leg thickness, thus improving stability during exercise.
[0028] 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 without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A leg exercise device for aerobics training, comprising a device base (1), characterized in that, The upper part of the device base (1) is rotatably connected to a telescopic housing (5), and a fixed roller (7) is provided at the lower part of the telescopic housing (5). A first connecting rod (14) is rotatably connected to one side of the fixed roller (7), and a second connecting rod (15) is rotatably connected to the first connecting rod (14). An elastic belt (10) is rotatably connected to the second connecting rod (15), and a first transmission wheel (23) is fixedly connected to the upper part of the second connecting rod (15). A transmission belt (24) is driven by the first transmission wheel (23), and a second transmission wheel (25) is driven by the transmission belt (24). A first gear (28) is fixedly connected to a transmission wheel (25). The first gear (28) is meshed with a second gear (29). A resistance adjustment housing (11) is rotatably connected to the lower part of the second gear (29). The resistance adjustment housing (11) is fixedly connected to the device base (1). A third gear (32) is fixedly connected to the second gear (29). A fourth gear (33) is meshed with the third gear (32). A third threaded rod (30) is symmetrically fixedly connected to both sides of the fourth gear (33). A slide rod (31) is threadedly connected to the third threaded rod (30). During the leg flexion and extension of the bodybuilder, the fixed roller (7) rotates upward. The rotation of the fixed roller (7) drives the second connecting rod (15) to rotate, thereby causing the elastic band (10) to stretch and contract, providing resistance for the flexion and extension movement. During the flexion and extension movement, the rotation of the second connecting rod (15) also drives the first transmission wheel (23) to rotate. The rotation of the first transmission wheel (23) drives the second gear (29) to rotate. The rotation of the second gear (29) drives the clamps (12) on the upper and lower sides to close inward and clamp the elastic band (10), so that the resistance provided by the elastic band (10) increases synchronously in the second half of the leg flexion and extension movement, which meets the needs of the leg muscles to exert force.
2. The aerobics training leg exercise device according to claim 1, characterized in that, The elastic band (10) is fixedly connected to an elastic band housing (9) at the end away from the second connecting rod (15). The elastic band housing (9) is fixedly connected to the device base (1). A fixing rod (27) is threadedly connected to the lower part of the elastic band housing (9). A pressure plate (26) is rotatably connected to the fixing rod (27).
3. The aerobics training leg exercise device according to claim 1, characterized in that, The resistance adjustment housing (11) is fixedly connected to a slide rod (31), and the slide rod (31) is slidably connected to two sides by clamps (12).
4. The aerobics training leg exercise device according to claim 1, characterized in that, The lower part of the fixed roller (7) is fixedly connected to an adjustment housing (16), and a second motor (18) is fixedly connected inside the adjustment housing (16). An adjustment component is provided at the output end of the second motor (18).
5. The aerobics training leg exercise device according to claim 4, characterized in that, The adjustment assembly includes a first threaded rod (19) provided at the output end of the second motor (18), the first threaded rod (19) being threadedly connected to a connecting block (17), the connecting block (17) being fixedly connected to a movable roller (8), and a fixed roller (7) being slidably connected to one end of the connecting block (17) away from the movable roller (8).
6. The aerobics training leg exercise device according to claim 5, characterized in that, The upper part of the connecting block (17) is rotatably connected to two rotating wheels (21), and a limit rod (20) is provided in the middle of the two rotating wheels (21).
7. The aerobics training leg exercise device according to claim 1, characterized in that, The telescopic housing (5) is provided with a first motor (13) on its upper part, and the output end of the first motor (13) is provided with a telescopic component.
8. The aerobics training leg exercise device according to claim 7, characterized in that, The telescopic assembly includes a second threaded rod (22) provided at the output end of the first motor (13), the second threaded rod (22) is threadedly connected to an adjusting rod (6), the adjusting rod (6) is slidably connected to the telescopic housing (5), and a fixed roller (7) is fixedly connected to the bottom of the adjusting rod (6).
9. The aerobics training leg exercise device according to claim 1, characterized in that, The device base (1) is fixedly connected to a backrest (2), the backrest (2) is fixedly connected to a seat cushion (3) at the front end, and the seat cushion (3) is fixedly connected to handles (4) on both sides.