An exercise mat for lower limbs with a gear-adjustable resistance source

Abstract

The utility model relates to a lower limbs exercise pad with gear adjustment type resistance source relates to the technical field of lower limbs training device, including placing pad and resistance box, placing pad is fixedly connected with resistance box, and the inside of resistance box is equipped with torsional spring resistance subassembly, first clutch mechanism and second clutch mechanism, torsional spring resistance subassembly includes the driven rod of being fixedly established in resistance box, rotatable assembly's driving rod and the torsional spring between driving rod and driven rod, and the driving rod is connected leg exercise subassembly, first clutch mechanism is assembled between driving rod and resistance box inner wall, is used for locking torsional spring's torsion angle, second clutch mechanism is equipped between driving rod and leg exercise subassembly, and the torque on-off is realized through second clutch mechanism, can adjust torsional spring pre -tension angle and make leg exercise subassembly reset through leg control mode, realize lower limbs exercise resistance multi -gear adjustable. The utility model can adopt double clutch and torsional spring resistance combination, realize resistance multi -gear stable adjustable.

Description

Technical Field

[0001] This application relates to the field of lower limb training device technology, and more particularly to a lower limb exercise mat with an adjustable resistance source. Background Technology

[0002] Lower limb exercise mats are exercise aids used for muscle strengthening and functional recovery, and are widely used in home fitness and medical rehabilitation. Their core principle is to provide a controllable resistance source to assist users in completing specific limb movements, playing a vital role in improving lower limb muscle strength, joint flexibility, and promoting neuromuscular control recovery. With the rapid development of rehabilitation medicine technology, lightweight equipment integrating adjustable resistance sources and providing good support has become a key focus of industry research and development, aiming to achieve the best balance between exercise effectiveness, operational safety, and ease of use.

[0003] Existing lower limb exercise mats and rehabilitation training equipment have significant shortcomings in terms of resistance adjustment, structural stability, portability, and long-term reliability, making it difficult to meet the comprehensive needs of home fitness and medical rehabilitation. Firstly, traditional weight-based resistance equipment relies on metal weights and large frames, resulting in bulky size, poor portability, and the risk of inertial impact, making it unsuitable for home and rehabilitation settings. Secondly, while non-Newtonian fluid damping solutions are smaller, the resistance fluctuates significantly with exercise frequency, making stable and quantifiable level adjustments impossible, resulting in insufficient training precision.

[0004] In terms of mechanical adjustment structure, the existing positioning pin type gear mechanism has significant shortcomings: it adopts a single-sided cantilever force distribution, and the positioning pin is subjected to alternating shear loads for a long time, which easily leads to stress concentration, pin wear, and radial out-of-roundness of the gear hole. This results in mechanical play in the locking part, a decrease in resistance transmission stiffness, and difficulty in achieving stable and precise resistance adjustment over a long period of time. At the same time, this type of structure is mostly a line contact fit, with high contact pressure and poor fatigue resistance. It is prone to loosening after long-term use, affecting training safety and accuracy.

[0005] In addition, existing products generally suffer from insufficient support and insecure fixation: the mat structure does not conform to the force curve of the human lower limbs, easily causing local pressure and discomfort; the bottom has weak anti-slip ability, making it easy to shift during exercise and affecting the stability of the movement. The resistance mechanism has low integration with the mat, the overall structure is loose, operation is cumbersome, and adjustments mostly rely on manual knobs or pins, making it impossible to easily switch the intensity during exercise, resulting in a low user experience and training efficiency.

[0006] Therefore, it is necessary to propose a lower limb exercise mat with adjustable resistance levels to solve the above problems. Utility Model Content

[0007] This application provides a lower limb exercise mat with an adjustable resistance source. It aims to address the significant shortcomings of existing lower limb exercise equipment in the related technology, such as: the bulky weight-type structure and large inertial impact; unstable fluid damping resistance and difficulty in quantifying the levels; traditional positioning pin adjustment with unilateral cantilever force, which is prone to stress concentration, hole wear, and mechanical play, resulting in poor resistance transmission accuracy and long-term reliability; insufficient support and anti-slip properties of the mat body, low integration, inconvenience in use, and inability to meet the technical problems of stable, accurate, and durable exercise requirements.

[0008] This application provides a lower limb exercise mat with an adjustable resistance source, including a placement mat and a resistance box. The placement mat is fixedly connected to the resistance box, and the resistance box is provided with a torsion spring resistance assembly, a first clutch mechanism and a second clutch mechanism inside.

[0009] The torsion spring resistance assembly includes a driven rod fixed in the resistance box, a rotatably assembled active rod, and a torsion spring disposed between the active rod and the driven rod, wherein the active rod is externally connected to a leg exercise assembly;

[0010] The first clutch mechanism is assembled between the drive rod and the inner wall of the resistance box to lock the torsion angle of the torsion spring;

[0011] The second clutch mechanism is located between the active rod and the leg exercise component. The torque is switched on and off through the second clutch mechanism. The preload angle of the torsion spring can be adjusted and the leg exercise component can be reset via leg control, so as to achieve multiple adjustable levels of resistance for lower limb exercise.

[0012] The technical solutions described in this application embodiment have at least the following technical effects: The combination of dual clutches and torsion spring resistance enables stable and adjustable resistance at multiple levels. By locking the angle through the first clutch mechanism and resetting through the second clutch mechanism, the adjustment accuracy and locking reliability are significantly improved, eliminating the defects of traditional positioning pins such as stress concentration and large play.

[0013] In this embodiment, the first clutch mechanism comprises a lead screw, a trapezoidal block, and a limiting tooth disposed on the inner wall of the resistance box. By rotating the handle, the lead screw drives the trapezoidal block to engage with the limiting tooth and lock the rotation angle of the torsion spring.

[0014] This technical solution utilizes a first clutch mechanism comprised of a lead screw, a trapezoidal block, and limiting teeth to achieve efficient locking of the torsion spring angle and precise adjustment of resistance. The structure is simple, operation is convenient, and locking is robust. Employing surface contact meshing and lead screw self-locking, it fundamentally improves upon the wear, play, and loosening defects of traditional mechanisms, enhancing long-term reliability.

[0015] In this embodiment, the second clutch mechanism includes a clutch block that is spring-loaded and a paddle block disposed on the limiting tooth.

[0016] This technical solution employs a second clutch mechanism consisting of a spring-loaded clutch block and a limiting toothed block to achieve rapid torque switching and automatic reset of the exercise components. It features a simple structure, reliable operation, and rapid response.

[0017] In this embodiment, the leg exercise assembly includes a connecting rod sleeved on the active rod and an exercise rod fixed on the connecting rod. A horizontal shaft is provided on the output shaft of the exercise rod for abutting against the user's calf for exercise. The second clutch mechanism is disposed between the connecting rod and the active rod.

[0018] This technical solution utilizes a connecting rod, an exercise rod, and a horizontal axis to form a direct force-generating structure. Combined with a second clutch mechanism, it enables leg-controlled resistance adjustment and automatic reset. The structure is simple, the transmission is efficient, and the operation is intuitive. The horizontal axis conforms to the lower leg for support, resulting in natural force generation, high comfort, and reduced fatigue even with prolonged use.

[0019] In this embodiment, the exercise bar is a telescopic extension bar.

[0020] Through this technical solution, the present invention sets the exercise bar as a telescopic sleeve, so that the lever arm and length can be flexibly adjusted, greatly improving the adaptability of the equipment to different groups of people, making it more comfortable to use and more scientific to exercise.

[0021] In this embodiment, the horizontal axis is covered with a flexible pad.

[0022] Through this technical solution, the present invention covers the outer side of the horizontal axis with a flexible pad, which greatly improves the comfort and safety of use with a flexible buffer and anti-slip fit design, avoiding hard contact pressure and slippage during movement.

[0023] Beneficial Effects: The first clutch mechanism, consisting of a lead screw, trapezoidal block, and limiting teeth, works in conjunction with the second clutch mechanism, consisting of a spring clutch block and a lever block. This structurally solves the problems of unstable resistance adjustment, easy loosening of locking mechanisms, and large transmission play in traditional lower limb exercise equipment. The lead screw's self-locking and surface contact engagement significantly reduce stress concentration and wear, improving long-term reliability. The exercise bar uses a telescopic sleeve and is covered with a flexible pad on the horizontal axis, adaptable to users with different leg lengths, providing cushioning, pressure reduction, and a non-slip fit, significantly improving comfort and movement stability. The dual-clutch mechanism enables leg-controlled adjustment, torque on / off, and automatic reset, making operation simple, requiring no manual intervention, and offering higher adjustment precision. The overall structure is compact and portable, eliminating bulky counterweights, and providing stable and adjustable resistance, eliminating inertial impact and avoiding the defects of fluid damping fluctuating with frequency. This solution has high integration, stable support, and uniform force distribution, effectively improving training accuracy, safety, and equipment lifespan, making it more suitable for home fitness and rehabilitation training scenarios. Attached Figure Description

[0024] Figure 1A three-dimensional structural diagram of a lower limb exercise mat with an adjustable resistance source provided in an embodiment of this application;

[0025] Figure 2 A cross-sectional structural schematic diagram of the resistance box provided in an embodiment of this application;

[0026] Figure 3 A cross-sectional structural schematic diagram of the first clutch mechanism and the second clutch mechanism provided in the embodiments of this application;

[0027] The following are the labeling elements in the figure:

[0028] 1. Placement pad; 2. Resistance box; 3. Torsion spring resistance assembly; 31. Driving rod; 32. Driven rod; 33. Torsion spring; 4. First clutch mechanism; 41. Lead screw; 42. Trapezoidal block; 43. Limiting tooth; 44. Handle; 5. Second clutch mechanism; 51. Spring; 52. Clutch block; 53. Pulley; 6. Leg exercise assembly; 61. Connecting rod; 62. Exercise rod; 63. Horizontal shaft. Detailed Implementation

[0029] Existing lower limb exercise mats and rehabilitation training equipment have significant shortcomings in terms of resistance adjustment, structural stability, portability, and long-term reliability, making it difficult to meet the comprehensive needs of home fitness and medical rehabilitation. Firstly, traditional weight-based resistance equipment relies on metal weights and large frames, resulting in bulky size, poor portability, and the risk of inertial impact, making it unsuitable for home and rehabilitation settings. Secondly, while non-Newtonian fluid damping solutions are smaller, the resistance fluctuates significantly with exercise frequency, making stable and quantifiable level adjustments impossible, resulting in insufficient training precision.

[0030] In terms of mechanical adjustment structure, the existing positioning pin type gear mechanism has significant shortcomings: it adopts a single-sided cantilever force distribution, and the positioning pin is subjected to alternating shear loads for a long time, which easily leads to stress concentration, pin wear, and radial out-of-roundness of the gear hole. This results in mechanical play in the locking part, a decrease in resistance transmission stiffness, and difficulty in achieving stable and precise resistance adjustment over a long period of time. At the same time, this type of structure is mostly a line contact fit, with high contact pressure and poor fatigue resistance. It is prone to loosening after long-term use, affecting training safety and accuracy.

[0031] In addition, existing products generally suffer from insufficient support and insecure fixation: the mat structure does not conform to the force curve of the human lower limbs, easily causing local pressure and discomfort; the bottom has weak anti-slip ability, making it easy to shift during exercise and affecting the stability of the movement. The resistance mechanism has low integration with the mat, the overall structure is loose, operation is cumbersome, and adjustments mostly rely on manual knobs or pins, making it impossible to easily switch the intensity during exercise, resulting in a low user experience and training efficiency.

[0032] Based on this, in order to improve the obvious defects of existing lower limb exercise equipment in related technologies, such as: the counterweight structure is bulky and has a large inertial impact; the fluid damping resistance is unstable and difficult to quantify the levels; the traditional positioning pin adjustment is a single-sided cantilever force, which is prone to stress concentration, hole wear, mechanical play, poor resistance transmission accuracy and long-term reliability; at the same time, the pad support and anti-slip are insufficient, the integration is low, and the use is inconvenient, and it cannot meet the technical problems of stable, accurate and durable exercise requirements, the embodiments of this application provide the following solutions.

[0033] Please refer to the following: Figures 1 to 3 This application provides a lower limb exercise mat with an adjustable resistance source. The lower limb exercise mat with an adjustable resistance source includes a placement mat 1 and a resistance box 2. The placement mat 1 and the resistance box 2 are fixedly connected. The resistance box 2 is provided with a torsion spring resistance assembly 3, a first clutch mechanism 4 and a second clutch mechanism 5 inside.

[0034] The torsion spring resistance assembly 3 includes a driven rod 32 fixed in the resistance box 2, a rotatably assembled active rod 31, and a torsion spring 33 disposed between the active rod 31 and the driven rod 32. The active rod 31 is externally connected to the leg exercise assembly 6.

[0035] The first clutch mechanism 4 is assembled between the drive rod 31 and the inner wall of the resistance box 2, and is used to lock the torsion angle of the torsion spring 33;

[0036] The second clutch mechanism 5 is located between the active rod 31 and the leg exercise component 6. The torque is switched on and off through the second clutch mechanism 5. The preload angle of the torsion spring 33 can be adjusted and the leg exercise component 6 can be reset via the leg control method, so as to realize the adjustable resistance of the lower limb exercise.

[0037] The lower limb exercise mat with adjustable resistance provided in this embodiment enhances overall structural stability by fixing the pad 1 to the resistance box 2. The torsion spring resistance assembly 3 provides stable linear resistance through the cooperation of the active rod 31, the driven rod 32, and the torsion spring 33. The first clutch mechanism 4 reliably locks the torsion angle of the torsion spring 33, ensuring a fixed resistance level. The second clutch mechanism 5 controls the torque switching and resets the leg exercise assembly 6, supporting leg-controlled adjustment. The coordinated operation of these structures avoids adjustment play and locking failure, resulting in precise resistance adjustment, easy operation, and improved exercise stability and safety.

[0038] In this embodiment, the first clutch mechanism 4 consists of a lead screw 41, a trapezoidal block 42, and a limiting tooth 43 disposed on the inner wall of the resistance box 2. By rotating the handle 44, the lead screw 41 drives the trapezoidal block 42 to engage with the limiting tooth 43 and lock the rotation angle of the torsion spring 33.

[0039] In this configuration, the first clutch mechanism 4 of this invention consists of a lead screw 41, a trapezoidal block 42, and a limiting tooth 43 on the inner wall of the resistance box 2. Rotating the handle 44 drives the lead screw 41 to push the trapezoidal block 42 into engagement with the limiting tooth 43, thus precisely locking the rotation angle of the torsion spring 33. The lead screw 41 provides smooth transmission and strong self-locking performance. The trapezoidal block 42 and the limiting tooth 43 have a large meshing area and uniform force distribution, effectively avoiding the stress concentration, shear wear, and out-of-roundness problems that are common with traditional single-sided positioning pins. This significantly reduces the mechanical play in the locking part, improves the angle locking accuracy and structural fatigue resistance, ensures long-term stability of the resistance level without loosening, and ensures reliable resistance transmission and sufficient rigidity during exercise. The first clutch mechanism 4, the torsion spring resistance assembly 3, the second clutch mechanism 5, and the resistance box 2 housing form an integrated unit, with a reasonable overall structural layout and clear transmission path. The locking mechanism of lead screw 41, trapezoidal block 42, and limiting tooth 43 works in conjunction with driving rod 31, driven rod 32, and torsion spring 33 to achieve graded adjustable preload angle of torsion spring 33. This, combined with the torque switching and reset functions of the second clutch mechanism 5, enables leg control adjustment and stable exercise. This mechanism simplifies the internal transmission structure, improves space utilization, enhances the overall structural strength and operational stability of the device, and solves problems such as unstable adjustment, unreliable locking, and loose structure in existing technologies.

[0040] In this embodiment, the second clutch mechanism 5 includes a clutch block 52 that is abutted by a spring 51 and a paddle block 53 disposed on the limiting tooth 43.

[0041] In this configuration, the second clutch mechanism 5 of this invention consists of a clutch block 52 abutted by a spring 51 and a lever 53 on a limiting tooth 43. The spring 51 provides a stable clamping force, keeping the clutch block 52 in a normally engaged state, while the lever 53 enables rapid disengagement and reset control. The second clutch mechanism 5, together with the first clutch mechanism 4, the torsion spring resistance assembly 3, and the leg exercise assembly 6, forms a complete transmission cooperation, undertaking the core functions of torque switching and reset in the overall structure. When adjusting the resistance, the lever 53 drives the clutch block 52 to disengage, thus disconnecting the power and facilitating the adjustment of the preload angle of the torsion spring 33 by the leg control. After adjustment, the spring 51 pushes the clutch block 52 to re-engage, allowing the leg exercise assembly 6 to reset smoothly. This mechanism works collaboratively with the lead screw 41, trapezoidal block 42, limiting tooth 43, and other structures without interference, ensuring clear transmission, optimizing the internal space layout, improving the overall compactness of the device, and solving problems such as cumbersome adjustment, difficult reset, and large transmission play in traditional structures.

[0042] In this embodiment, the leg exercise component 6 includes a connecting rod 61 sleeved on the active rod 31 and an exercise rod 62 fixed on the connecting rod 61. A horizontal shaft 63 is provided on the output shaft of the exercise rod 62 for abutting against the user's calf to exercise. The second clutch mechanism 5 is disposed between the connecting rod 61 and the active rod 31.

[0043] With this configuration, the leg exercise component 6, the active rod 31, the connecting rod 61, the second clutch mechanism 5, and the torsion spring resistance component 3 form a complete transmission system, which, together with the placement pad 1, the resistance box 2, and the first clutch mechanism 4, constitutes an integrated lower limb exercise device. The connecting rod 61 is sleeved on the active rod 31, and works with the second clutch mechanism 5 to achieve rapid engagement and disengagement of the exercise rod 62 and the resistance source. When adjusting the resistance, the connecting rod 61 can be rotated independently to set the preload angle of the torsion spring 33. After adjustment, it automatically resets and enters the exercise state.

[0044] In this embodiment, the exercise bar 62 is a telescopic sleeve bar.

[0045] With this configuration, the exercise bar 62 is a telescopic extension bar, forming a complete transmission connection with the connecting rod 61, horizontal shaft 63, second clutch mechanism 5, and active rod 31. Together with the resistance box 2, torsion spring resistance assembly 3, and first clutch mechanism 4, it constitutes an integrated lower limb exercise system. The telescopic adjustment function can match the lower limb movement range of different users, accurately matching the exercise intensity and range of motion, making the resistance transmission more even and the force application more reasonable.

[0046] In this embodiment, a flexible pad is wrapped around the outside of the horizontal axis 63.

[0047] With this configuration, the flexible pad on the outer side of the horizontal axis 63, together with the retractable exercise bar 62, connecting rod 61, second clutch mechanism 5, and active rod 31, form a complete force transmission system, working in conjunction with the resistance box 2, torsion spring resistance assembly 3, and first clutch mechanism 4. The flexible pad provides cushioning and anti-slip support during the force exertion phase of exercise, allowing the leg force to be transmitted more smoothly to the resistance source, avoiding force deviation and movement deformation due to localized hard contact, thus improving resistance utilization efficiency and training accuracy. This structure, in conjunction with leg control adjustment, dual-clutch locking, and retractable lever arm adjustment functions, further optimizes ergonomics and solves problems such as stiff contact, easy slippage, poor comfort, and non-standard training movements associated with traditional equipment.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lower limb exercise mat with an adjustable resistance source, characterized in that: It includes a placement pad (1) and a resistance box (2), wherein the placement pad (1) and the resistance box (2) are fixedly connected, and the resistance box (2) is provided with a torsion spring resistance assembly (3), a first clutch mechanism (4) and a second clutch mechanism (5) inside; The torsion spring resistance assembly (3) includes a driven rod (32) fixed in the resistance box (2), a rotatably mounted active rod (31), and a torsion spring (33) disposed between the active rod (31) and the driven rod (32). The active rod (31) is externally connected to the leg exercise assembly (6). The first clutch mechanism (4) is assembled between the drive rod (31) and the inner wall of the resistance box (2) to lock the torsion angle of the torsion spring (33); The second clutch mechanism (5) is located between the active rod (31) and the leg exercise component (6). The torque is switched on and off through the second clutch mechanism (5). The pre-tension angle of the torsion spring (33) can be adjusted by the leg control method and the leg exercise component (6) can be reset, so that the lower limb exercise resistance can be adjusted in multiple levels.

2. The lower limb exercise mat with an adjustable resistance source according to claim 1, characterized in that: The first clutch mechanism (4) consists of a lead screw (41), a trapezoidal block (42) and a limiting tooth (43) located on the inner wall of the resistance box (2). By rotating the handle (44), the lead screw (41) drives the trapezoidal block (42) to engage with the limiting tooth (43) and lock the torsion spring (33) at the rotation angle.

3. The lower limb exercise mat with an adjustable resistance source according to claim 1, characterized in that: The second clutch mechanism (5) includes a clutch block (52) abutted by a spring (51) and a paddle block (53) disposed on the clutch block (52).

4. The lower limb exercise mat with an adjustable resistance source according to claim 3, characterized in that: The leg exercise assembly (6) includes a connecting rod (61) sleeved on the active rod (31) and an exercise rod (62) fixed on the connecting rod (61). A horizontal shaft (63) is provided on the output shaft of the exercise rod (62) for abutting against the user's calf for exercise. The second clutch mechanism (5) is provided between the connecting rod (61) and the active rod (31).

5. The lower limb exercise mat with an adjustable resistance source according to claim 4, characterized in that: The exercise bar (62) is a telescopic sleeve bar.

6. The lower limb exercise mat with an adjustable resistance source according to claim 4, characterized in that: The horizontal axis (63) is covered with a flexible pad on the outside.

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