Lower limb rehabilitation training device
By designing a lower limb rehabilitation training device with highly adaptable foot sleeves and elastic ropes, the inconvenience and unstable training effects of existing devices have been solved, achieving efficient and safe lower limb rehabilitation training.
Patent Information
- Application Number
- CN202520410499.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Existing lower limb rehabilitation training devices have problems such as inconvenience to patients, space-consuming and expensive equipment, and unstable training effects. In particular, the elastic bands are prone to slipping, which affects the effect of high-intensity training.
A lower limb rehabilitation training device was designed, which includes a foot sleeve, a fixing strap, and an elastic pull rope. The foot sleeve fits tightly with the patient's foot. The design of the elastic pull rope and pull ring ensures effective force transmission and training effect. It adapts to the foot shape and size of different patients, and the training intensity is monitored by a force gauge.
It improves the stability and safety of training results, enhances the targeting, flexibility and adaptability of training, reduces force loss due to slippage, and provides personalized training needs and comfort.
Smart Images
Figure CN223901167U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of rehabilitation devices, in particular to a lower limb rehabilitation training device. BACKGROUND
[0002] With the development of medical technology and rehabilitation concepts, the training equipment and technology of the rehabilitation department are also constantly progressing. At present, in the rehabilitation treatment of postoperative patients with femoral shaft fracture, tibial plateau fracture, hip and knee joint replacement, knee joint cross ligament injury, etc., it is necessary and routine to recover the flexion and extension joint range of motion of the knee joint, recover the weight-bearing and walking ability of the lower limbs, and enhance the muscle strength of the quadriceps femoris and the hamstrings of the lower limbs. The training devices commonly used in the rehabilitation department include bi odex isokinetic training instrument, quadriceps femoris training chair or muscle strength enhancement training by binding sandbags at the ankle.
[0003] However, these traditional methods have some drawbacks. For patients who cannot be hospitalized for rehabilitation, it is not only inconvenient but also requires family members to accompany them to exercise at the rehabilitation department every day due to the inconvenience of lower limb movement. Purchasing a special quadriceps femoris training chair not only occupies space but also has a high cost. If you train at home by binding sandbags, you need to replace sandbags of different weights as your muscle strength increases, and heavy sandbags tied at the ankle may cause instability and affect the exercise effect.
[0004] Some devices that bind elastic bands above the ankle joint have appeared on the market to assist patients in rehabilitation training. However, during exercise, especially in cases of high resistance, the elastic band is prone to sliding up the lower leg due to increased resistance, resulting in a shortened force arm and affecting the effectiveness of high-intensity training. CONTENT OF THE INVENTION
[0005] The purpose of the present application is to provide a lower limb rehabilitation training device that is more closely matched with the patient's foot and can improve the training effect of the patient.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a lower limb rehabilitation training device, which comprises:
[0007] The foot cover is a sleeve-shaped structure with two open ends, the two openings of the foot cover are respectively a first opening and a second opening, and the inner diameter of the first opening is larger than that of the second opening, so that the foot cover forms a conical side wall.
[0008] The fixing belt is arranged at different positions of the side wall of the first opening of the foot cover at both ends, so as to divide the first opening into a first sub-opening and a second sub-opening.
[0009] An elastic pull rope, one end of the elastic pull rope is fixed, the other end of the elastic pull rope is drivingly connected to the foot cover, so that the foot cover can pull the elastic pull rope to stretch or retract.
[0010] In an optional embodiment, further comprising:
[0011] A pull ring, the pull ring is hingedly mounted on the foot cover, the pull ring can be rotated to one side of the first opening or one side of the second opening of the foot cover, and the other end of the elastic pull rope is arranged on the pull ring, so that the elastic pull rope is drivingly connected to the foot cover through the pull ring.
[0012] In an optional embodiment, further comprising:
[0013] A first force gauge, the first force gauge is arranged on the elastic pull rope close to one end of the foot cover, to detect the force applied by the foot cover to the elastic pull rope.
[0014] In an optional embodiment, the side wall at the first opening is an elastic area.
[0015] In an optional embodiment, the side wall at the second opening is an elastic area.
[0016] In an optional embodiment, further comprising:
[0017] A fixing member, the fixing member is arranged on one end of the elastic pull rope, and the fixing member is used to fix one end of the elastic pull rope.
[0018] In an optional embodiment, the fixing member comprises a buckle part, and the buckle part is a U-shaped plate structure.
[0019] In an optional embodiment, the fixing member further comprises a locking bolt, the locking bolt is threadedly mounted at the opening of the U-shaped structure of the buckle part, and rotating the locking bolt can open or close the opening of the U-shaped structure of the buckle part.
[0020] In an optional embodiment, the fixing member comprises a fixing clamp, and one end of the elastic pull rope is connected to the fixing clamp.
[0021] In an optional embodiment, further comprising:
[0022] A second force gauge, the second force gauge is arranged on the elastic pull rope close to one end of the fixing member, to detect the force applied by the foot cover to the elastic pull rope.
[0023] In the present application, the patient uses the protruding structure of the calcaneus to abut against the inner wall of the second opening during the flexion and extension training, which limits the displacement of the foot cover and prevents the foot cover from sliding relative to the patient's foot. This ensures effective transmission of force during the training process, so that the patient can more fully feel the training effect.
[0024] Other features and advantages of the present application will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0026] Figure 1 A structure schematic diagram of one view of one of the embodiments of the lower limb rehabilitation training device provided by the present application;
[0027] Figure 2 A structure schematic diagram of two views of one of the embodiments of the lower limb rehabilitation training device provided by the present application;
[0028] Figure 3 An assembly schematic diagram of three views of one of the embodiments of the lower limb rehabilitation training device provided by the present application;
[0029] Figure 4 A schematic diagram of one of the use states of four views of one of the embodiments of the lower limb rehabilitation training device provided by the present application;
[0030] Figure 5 A schematic diagram of another use state of four views of one of the embodiments of the lower limb rehabilitation training device provided by the present application;
[0031] Figure 6 A schematic diagram of one of the use states of four views of one of the embodiments of the lower limb rehabilitation training device provided by the present application.
[0032] FIG.:
[0033] 100 - foot cover; 110 - first opening; 112 - first sub-opening; 114 - second sub-opening; 120 - second opening; 130 - elastic region;
[0034] 200 - fixing belt; 210 - elastic pull rope; 220 - pull ring; 230 - first force gauge; 240 - fixing member. DETAILED DESCRIPTION
[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0036] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0037] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “set”, “connected” should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0038] The embodiments of the present application provide a lower limb rehabilitation training device, which comprises a foot cover 100, a fixing belt 200 and an elastic pull rope 210.
[0039] Figure 1 And Figure 2 are respectively schematic views of the foot cover 100 after being unfolded in different viewing angles, as shown in Figure 1 and Figure 2 The foot cover 100 is a sleeve structure with two open ends, the foot cover 100 has an internal space, the internal space of the foot cover 100 is used to cooperate with the foot of a patient, the inner wall of the foot cover 100 abuts against the foot of the patient, and the movement of the lower limb of the patient drives the movement of the foot cover 100.
[0040] As shown in Figure 1 and Figure 2 The two openings of the foot cover 100 are respectively a first opening 110 and a second opening 120, the inner diameter of the first opening 110 is greater than that of the second opening 120, so that the foot cover 100 forms a conical annular side wall, and the second opening 120 is arranged at the conical top of the foot cover 100, thereby making the whole foot cover 100 form a circular truncated cone appearance.
[0041] As Figure 1 and Figure 2 shown, the two ends of the fixing band 200 are arranged at different positions of the sidewall at the first opening 110 of the foot cover 100, and the two ends of the fixing band 200 can be detachably connected, for example, by magic tape, buckle or clasp, etc. As Figure 3 shown, after the two ends of the fixing band 200 are connected, the foot cover 100 is curled to form a conical annular sleeve structure, and the fixing band 200 divides the first opening 110 into a first sub-opening 112 and a second sub-opening 114.
[0042] As Figure 4 shown, the patient's heel passes through the second opening 120 of the foot cover 100, the patient's lower leg passes through the first sub-opening 112, and the patient's foot passes through the second sub-opening 114. During the flexion and extension training, the patient uses the protruding structure of the calcaneus to abut against the inner wall at the second opening 120 to limit the displacement of the foot cover 100, preventing the foot cover 100 from sliding relative to the patient's foot. This ensures effective force transmission during training, allowing the patient to more fully experience the training effect.
[0043] One end of the elastic pull rope 210 is fixed, for example, the one end of the elastic pull rope 210 is fixedly connected to a fixed entity, such as a building, furniture, etc., and the other end of the elastic pull rope 210 is drivingly connected to the foot cover 100, so that the foot cover 100 can pull the elastic pull rope 210 to stretch and retract.
[0044] During use, the patient's lower limb flexion and extension drives the foot cover 100 to move, and the foot cover 100 moves to drive the elastic pull rope 210 to stretch and retract, while the elastic pull rope 210 can exert a reaction force on the foot cover 100 to increase the load of the patient's flexion and extension movement and improve the rehabilitation training effect.
[0045] The reaction force design of the elastic pull rope 210 not only increases the load of the patient's flexion and extension movement, but also provides stable resistance or assistance to help the patient better control the amplitude and speed of the movement, avoiding injuries caused by excessive or improper movement, and improving the safety of the training.
[0046] In addition, in the present application, the foot cover 100 is designed to closely fit the patient's foot, and the abutment between the inner wall and the patient's foot ensures that the lower limb movement can be accurately transmitted to the foot cover 100, thereby driving the elastic pull rope 210 to stretch and retract. This design makes the rehabilitation training more targeted to the patient's lower limb muscles and joints, improving the effectiveness of the training.
[0047] In the present application, the conical annular sidewall design of the foot cover 100 and the detachable connection design of the fixing band 200 make the device adaptable to the shape and size of different patients' feet. This adaptability makes the device more versatile and can meet the rehabilitation needs of more patients.
[0048] In the present application, the inner space of the foot cover 100 cooperates with the patient's foot to provide good wrapping and support, so that the patient feels comfortable during the training process.
[0049] In one embodiment, the lower limb rehabilitation training device includes a plurality of elastic pull ropes 210 with different elasticities. By changing the fixed positions of the elastic pull ropes 210 or replacing pull ropes with different elasticities, the training load can be flexibly adjusted to meet the individual training needs of the patient.
[0050] As shown in Figure 4 , in one embodiment, the lower limb rehabilitation training device further includes a pull ring 220, which is hingedly installed on the foot cover 100, as shown in Figure 5 and Figure 6 , the pull ring 220 can be rotated to the side of the first opening 110 or the second opening 120 of the foot cover 100.
[0051] The other end of the elastic pull rope 210 is arranged on the pull ring 220, so that the elastic pull rope 210 is drivingly connected to the foot cover 100 through the pull ring 220. During the training process, the patient's lower limbs make flexion and extension movements to drive the foot cover 100 and the pull ring 220 arranged on the foot cover 100 to move, and the movement of the pull ring 220 drives the elastic pull rope 210 to stretch and contract, while the elastic pull rope 210 exerts a reaction force on the pull ring 220, thereby exerting a reaction force on the foot cover 100 and the patient's lower limbs.
[0052] As shown in Figure 5 and Figure 6 , by hingedly installing the pull ring 220 on the foot cover 100 and enabling the pull ring 220 to rotate to the side of the first opening 110 or the second opening 120 of the foot cover 100, the patient can adjust the position of the pull ring 220 according to different rehabilitation needs and training goals, thereby performing different flexion and extension rehabilitation training. This design increases the flexibility and diversity of training, which helps the patient to more comprehensively exercise the lower limb muscles and joints.
[0053] The rotating design of the pull ring 220 enables the elastic pull rope 210 to more accurately exert a reaction force on the patient's lower limbs. Whether on the side of the first opening 110 or the second opening 120, the pull ring 220 can ensure that the reaction force of the elastic pull rope 210 is effectively transmitted to the foot cover 100 and the patient's foot, thereby increasing the load of the patient's flexion and extension movement and improving the effect of rehabilitation training.
[0054] By adjusting the position of the pull ring 220, the patient can specifically exercise different muscle groups of the lower limbs, such as the quadriceps on the front side of the thigh, the hamstrings on the back side of the thigh, and the calf muscles, etc. This targeted training helps to speed up the patient's rehabilitation process.
[0055] Exemplarily, in one embodiment, the foot sleeve 100 is provided with a fixing seat which is fixedly arranged on the foot sleeve 100 by means of clamping, gluing, bolt connection or riveting, and the like. Exemplarily, the fixing seat is arranged at a position close to the ankle of the patient on the foot sleeve 100. The pull ring 220 is hingedly installed on the fixing seat, so that the pull ring 220 can rotate relative to the foot sleeve 100.
[0056] As shown in Figures 1 to 3 , in one embodiment, the side wall at the second opening 120 is an elastic region 130 which can stretch and rebound.
[0057] In the present application, the side wall at the second opening 120 is designed as the elastic region 130, so that the foot sleeve 100 can adapt to different sizes of heels. This design takes into account the difference in foot size between patients, ensuring that the foot sleeve 100 can tightly and comfortably wrap around the foot regardless of the size of the patient's heel, improving the versatility and adaptability of the device.
[0058] The elastic region 130 can stretch and rebound, which means that when the patient wears the foot sleeve 100, the elastic region 130 can adaptively adjust according to the shape and size of the patient's foot, thereby better fitting the patient's foot skin. This fit reduces friction and compression between the foot sleeve 100 and the foot, improving the patient's comfort during training.
[0059] Since the elastic region 130 can better fit the patient's foot skin, it ensures that the foot sleeve 100 can stably follow the foot movement during the flexion and extension training, reducing the loss of strength caused by the sliding or loosening of the foot sleeve 100. This stability makes the training more efficient, helping the patient better exercise the lower limb muscles and joints.
[0060] As shown in Figures 1 to 3 , in one embodiment, the side wall at the first opening 110 is an elastic region 130 which can stretch and rebound.
[0061] Exemplarily, as shown in Figures 1 to 4 , the fixing belt 200 divides the first opening 110 into a first sub-opening 112 and a second sub-opening 114, so that the elastic region 130 is arranged at the first sub-opening 112 and the second sub-opening 114, and the elastic region 130 at the first opening 110 can adapt the foot sleeve 100 to different sizes of lower legs. The elastic region 130 at the second opening 120 can adapt the foot sleeve 100 to different sizes of foot soles.
[0062] The elastic region 130 can adaptively adjust according to the shape and size of the patient's lower leg and foot sole, thereby better fitting the patient's skin, reducing friction and compression between the foot sleeve 100 and the skin, and improving the patient's comfort during training.
[0063] Exemplarily, the area outside the elastic region 130 of the foot sleeve 100 is a non-elastic region that cannot stretch and rebound. The non-elastic region reduces the deformation of the foot sleeve 100 after being subjected to force, prevents the foot sleeve 100 from deforming too much and reducing the contact area with the patient's foot, thereby avoiding causing the foot sleeve 100 to slide relative to the patient's foot, ensuring that the foot sleeve 100 can ensure the fit with the patient's foot, prevent the foot sleeve 100 from sliding, improve the training effect, and also ensure that the foot sleeve 100 has a certain tension, improving the adaptability and use comfort of the foot sleeve 100 with the patient's foot.
[0064] The design of the elastic region 130 also takes into account the durability of the foot sleeve 100. Since the elastic region 130 can stretch and rebound, it can absorb and alleviate the impact force of the patient's foot during exercise to some extent, reducing the risk of wear and damage to the foot sleeve 100, thereby prolonging the service life of the foot sleeve 100.
[0065] To realize the connection of the elastic stretching and the fixed entity, as shown in Figure 5 and Figure 6 In one embodiment, the lower limb rehabilitation training device further comprises a fixing member 240, which is arranged on one end of the elastic pull rope 210. The fixing member 240 can be connected with the fixed entity to fix one end of the elastic pull rope 210.
[0066] Therefore, in this application, one end of the elastic pull rope 210 is firmly connected to the fixed entity through the fixing member 240, ensuring the stability of the elastic pull rope 210 during the patient's flexion and extension rehabilitation training. This fixed connection prevents the elastic pull rope 210 from slipping or falling off during training, thereby ensuring the continuity and safety of the training process.
[0067] After the end of the elastic pull rope 210 is fixed, the elastic force it provides will remain relatively stable, which means that the patient can feel consistent resistance throughout the training process. This constant training intensity helps the patient better control the training rhythm and intensity, improving the training effect.
[0068] The design of the fixing member 240 allows the elastic pull rope 210 to be easily connected to different fixed entities, such as training equipment, walls, or bed frames, etc. This flexibility allows the lower limb rehabilitation training device to adapt to different training environments and scenarios, meeting the diverse needs of patients.
[0069] In one embodiment, the fixing member 240 comprises a buckle part, which is a U-shaped plate body structure. The buckle part can be clamped or hooked to the fixed entity, such as a table leg, a bed leg, a bed frame, etc.
[0070] In one embodiment, the fastener 240 further includes a locking bolt threaded onto the opening of the U-shaped structure of the latching portion. Rotating the locking bolt opens or closes the opening of the U-shaped structure of the latching portion. When the opening of the U-shaped structure of the latching portion is closed, the latching portion is locked to the fixed entity. When the opening of the U-shaped structure of the latching portion is open, the latching portion can be removed from the fixed entity.
[0071] Unlike the above embodiment where the fixing member 240 includes a snap-fit part and a locking bolt, in another embodiment, the fixing member 240 includes a fixing clip, and one end of the elastic pull rope 210 is connected to the fixing clip. The fixing clip can clamp the fixing entity, thereby fixing one end of the elastic pull rope 210 relative to the fixing entity.
[0072] In one embodiment, the fixing member 240 includes an adsorption member, one end of the elastic pull rope 210 is connected to the adsorption member, and the adsorption member can be adsorbed onto the fixing entity, thereby fixing one end of the elastic pull rope 210 relative to the fixing entity.
[0073] For example, the adsorption element is a suction cup or a magnetic connector, etc.
[0074] Furthermore, for patients who require fixed resistance training, it is difficult to precisely control the change in the point of force and maintain a constant maximum resistance.
[0075] like Figure 5 and Figure 6 As shown, in one embodiment, the lower limb rehabilitation training device further includes a first force gauge 230, which is disposed on one end of the elastic pull rope 210 near the foot sleeve 100 to detect the magnitude of the force exerted by the foot sleeve 100 on the elastic pull rope 210.
[0076] Unlike the technical solution of setting the first force gauge 230 in the above embodiments, in one embodiment, the lower limb rehabilitation training device also includes a second force gauge. The second force gauge is set on the elastic rope 210 at one end near the fixing member 240 to detect the magnitude of the force applied by the foot sleeve 100 to the elastic rope 210.
[0077] For patients requiring constant resistance training, precise control of the applied force is crucial. A first or second force gauge can detect the force exerted by the foot sleeve 100 on the elastic resistance rope 210 in real time, ensuring the patient maintains constant resistance during training. This helps the patient adhere to the predetermined training plan, avoiding insufficient or excessive training intensity, thereby improving training effectiveness.
[0078] For patients who need fixed resistance training, it is difficult to accurately control the change of the force point, which may cause muscle or joint injury. Through the monitoring of the dynamometer, it can be ensured that the patient will not be injured due to improper force during the training process. Accurate control of the force size helps the patient to maintain a comfortable posture and force during the training process, reducing the discomfort caused by uneven force.
[0079] By setting the dynamometer, the force of the patient can be monitored to prevent the elastic pull rope 210 from being stretched or broken due to excessive force, protecting the safety of the patient.
[0080] The data provided by the dynamometer can be fed back to the doctor or patient in real time, so that they can know the training effect in time. If the force is less than the predetermined value, the resistance can be appropriately increased; if the force is too large, the resistance can be appropriately reduced, ensuring the scientificity and effectiveness of the training.
[0081] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.
[0082] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A lower extremity rehabilitation training device, characterized by, The utility model relates to a kind of foot coverings, including: Foot coverings (100), the foot coverings (100) are sleeve-like structure of two ends open, two openings of the foot coverings (100) are first opening (110) and second opening (120) respectively, the inner diameter of the first opening (110) is greater than the inner diameter of the second opening (120), so that the foot coverings (100) form conical side wall; Fixed band (200), two ends of the fixed band (200) are arranged at different positions of the side wall at the first opening (110) of the foot coverings (100) respectively, to divide the first opening (110) into first sub-opening (112) and second sub-opening (114); Elastic pull rope (210), one end of the elastic pull rope (210) is fixed, and the other end of the elastic pull rope (210) is drivingly connected to the foot coverings (100), so that the foot coverings (100) can pull the elastic pull rope (210) to stretch and contract.
2. The lower limb rehabilitation training device according to claim 1, characterized in that, Also including: Pull ring (220), the pull ring (220) is hingedly installed on the foot coverings (100), and the pull ring (220) can be rotated to the first opening (110) side or the second opening (120) side of the foot coverings (100), and the other end of the elastic pull rope (210) is arranged on the pull ring (220), so that the elastic pull rope (210) is drivingly connected to the foot coverings (100) through the pull ring (220).
3. The lower limb rehabilitation training device according to claim 1, characterized in that, Also including: First force gauge (230), the first force gauge (230) is arranged on the elastic pull rope (210) close to one end of the foot coverings (100), to detect the size of force exerted by the foot coverings (100) on the elastic pull rope (210).
4. The lower limb rehabilitation training device according to claim 1, characterized in that, The side wall at the first opening (110) is an elastic region (130).
5. The lower limb rehabilitation training device according to claim 1, characterized in that, The side wall at the second opening (120) is an elastic region (130).
6. The lower limb rehabilitation training device according to claim 1, characterized in that, Also including: Fixing part (240), the fixing part (240) is arranged on one end of the elastic pull rope (210), and the fixing part (240) is used to fix one end of the elastic pull rope (210).
7. The lower limb rehabilitation training device according to claim 6, characterized in that, The fixing part (240) includes a buckle part, and the buckle part is a U-shaped plate body structure.
8. The lower limb rehabilitation training device according to claim 7, characterized in that, The fixing part (240) further includes a locking bolt, and the locking bolt is threadedly installed at the opening of the U-shaped structure of the buckle part, and rotating the locking bolt can open or close the opening of the U-shaped structure of the buckle part.
9. The lower limb rehabilitation training device according to claim 6, characterized in that, The fixing part (240) includes a fixing clamp, and one end of the elastic pull rope (210) is connected to the fixing clamp.
10. The lower limb rehabilitation training device according to claim 6, characterized in that, Also including: Second force gauge, the second force gauge is arranged on the elastic pull rope (210) close to one end of the fixing part (240), to detect the size of force exerted by the foot coverings (100) on the elastic pull rope (210).