Multi-angle ankle joint exercise device

Abstract

The invention discloses a multi-angle ankle joint exercise device, which relates to the technical field of medical equipment and comprises a strength adjusting mechanism, a lifting adjusting mechanism, a position adjusting mechanism and an angle adjusting mechanism, the force adjusting mechanism comprises an upper circular ring, a limiting ring, an arc sliding block, an elastic piece, a side plate, a vertical frame, a vertical sliding block, a spiral vertical rasp bar and an elastic rope. The connecting point of the upper portion of the limiting ring is fastened to the upper circular ring through a bolt, the arc sliding block is slidably installed on a sliding rail on the upper circular ring, the elastic pieces are fixedly installed on the two sides of the arc sliding block, the lower portions of the elastic pieces make contact with the upper portion of the upper circular ring, and the side plate is fixedly installed on the side face of the arc sliding block. When the device is used, strength recovery training of different strengths can be conducted according to the requirements of a patient, the elasticity of the elastic rope is changed by replacing the elastic rope and manually adjusting the using length of the elastic rope, and therefore the device adapts to training environments of different strengths.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to a multi-angle ankle joint training device. Background Art

[0002] The ankle joint is the main load-bearing structure and movement joint of the human body, and plays a vital role in daily life and exercise. It not only supports the weight of the human body, but also participates in many complex movements. Therefore, the health of the ankle joint directly affects the individual's athletic ability and quality of life.

[0003] Ankle injury is one of the common bone and joint injuries, including sprains, fractures, etc. These injuries often seriously affect the patient's daily life and exercise ability; in order to restore the function of the ankle joint and improve exercise ability, ankle joint mobility and muscle strength training are particularly important; through targeted training with some recovery devices, the muscles around the ankle joint can be strengthened, the ankle joint mobility can be improved, and the stability and flexibility of the joint can be improved, thereby effectively preventing and treating ankle injuries and dysfunction.

[0004] Existing ankle joint training devices are usually simple in structure, single in function, and cannot be adjusted, including the magnitude of the force cannot be adjusted, the range of motion cannot reach multiple angles, the active and passive cannot be combined, the leg angle cannot be changed, etc., and the efficiency is low. Summary of the invention

[0005] In view of the above technical problems, the present invention discloses a multi-angle ankle joint training device, which can effectively solve the problems in the background technology; when the present invention is used, it can perform strength recovery training of different intensities according to the needs of the patient, and the elastic force of the elastic rope is changed by replacing the elastic rope and manually adjusting the use length of the elastic rope, so as to adapt to the training environment of different intensities; when the present invention is used, the position of the elastic rope can also be adjusted by a sliding device to meet the multi-angle training of the ankle joint, and when sliding to different positions, the vertical height of the elastic rope can be automatically adjusted by the action of a limiting ring, so that the elastic rope floats up and down when rotating, and always maintains a vertical state with the surface in contact with the foot in different circumferential directions of the foot surface, thereby preventing the elastic rope from falling off; when the present invention is used, the height can be adjusted according to the different soles of the patient's feet, and the horizontal position of the heel can be adjusted, so that the device can adapt to different soles of the feet, so as to achieve the best training effect; the present device can also adjust the overall tilt angle of the device, so that the patient's calf can be used when lying flat or sitting with the calf tilted.

[0006] The multi-angle ankle joint exercise device comprises a strength adjustment mechanism, a lifting adjustment mechanism, a position adjustment mechanism and an angle adjustment mechanism; the strength adjustment mechanism comprises: an upper circular ring, a limiting ring, an arc slider, a spring piece, a side plate, a vertical frame, a vertical slider, a spiral vertical threaded rod and an elastic rope; the connection point on the limiting ring is locked on the upper circular ring by bolts, the circular arc slider is slidably mounted on the slide rail on the upper circular ring, the spring piece is fixedly mounted on both sides of the circular arc slider, the bottom of the spring piece contacts the top of the upper circular ring, and the side plate is fixedly mounted on the side of the circular arc slider; the vertical frame is slidably mounted in a slide groove on the side plate, a round rod is provided on the back of the vertical frame, the round rod is slidably connected to the slide groove in the middle of the side plate, the round rod is also slidably connected to the slide groove on the limiting ring, the vertical slider is slidably mounted in the slide groove on the vertical frame, the upper and lower ends of the spiral vertical threaded rod are rotatably mounted in the round hole on the vertical frame, the spiral vertical threaded rod is threadedly connected to the vertical slider, a part of the elastic rope is inserted in the notch on the vertical frame, and the elastic rope is also hung in the notch on the vertical slider.

[0007] Preferably, the lifting and lowering adjustment mechanism includes: an upper support rod, a lower support rod, a lower ring, a buckle I, a short shaft, and a spring; the upper end of the upper support rod is fixedly connected to the lower end of the upper ring, and the lower end of the upper support rod is provided with a long shaft, which is slidably installed in the circular hole on the lower support rod, and the lower end of the lower support rod is fixedly installed on the lower ring; the buckle I is slidably installed on the short shaft, and the short rod at the lower end of the buckle I is inserted into the circular hole on the side of the lower support rod, the short shaft is fixedly installed on the side of the lower end of the upper support rod, and the spring is installed on the short shaft, one end of the spring is in contact with the buckle I, and the other end of the spring is in contact with the short shaft.

[0008] Preferably, the position adjustment mechanism includes: a support plate, a buckle II, a foot rest, a baffle, a strap, and a slot; a lower ring is fixedly mounted on the support plate, buckle II is inserted into the round hole on the lower ring, and buckle II is inserted into the round hole on the side of the foot rest, and a round rod slide is also provided on the lower ring, and the foot rest is slidably mounted on the round rod slide; the baffle is fixedly mounted on the inner end of the foot rest, and two straps are provided, one end of the strap is rotatably mounted on the rotating shaft on one side of the foot rest, and the other end is clamped in the slot, and the slot is fixedly mounted on the other side of the foot rest.

[0009] Preferably, the angle adjustment mechanism includes: a base, an extension bracket, a connecting rod, a horizontal slider, and a horizontal threaded rod; a support plate is rotatably mounted on a hinge seat on the base; four extension brackets are provided, which are slidably mounted in slide grooves at the four corners of the base; one end of the connecting rod is rotatably mounted on the hinge seat under the support plate, and the other end of the connecting rod is rotatably mounted on the long axes on both sides of the horizontal slider, the horizontal slider is slidably mounted on the slide groove above the limit ring, and both ends of the horizontal threaded rod are rotatably mounted in the circular holes on the base, and the horizontal threaded rod is threadedly connected to the horizontal slider.

[0010] Preferably, the shape of the slide groove in the limiting ring is undulating.

[0011] Preferably, the bottom of the spring piece is covered with frosted rubber material.

[0012] Preferably, the contact surface between the baffle and the heel is made of flexible rubber material.

[0013] Working principle: When the present invention is in use, it can carry out strength recovery training of different intensities according to the needs of the patient. The elastic force of the elastic rope is increased by replacing the elastic rope and manually adjusting the use length of the elastic rope, so as to adapt to the training environment of different intensities. When the present invention is in use, the position of the elastic rope can also be adjusted by a sliding device to meet the multi-angle range of motion and strength training of the ankle joint, and when sliding to different positions, the vertical height of the elastic rope can be automatically adjusted through the action of the limiting ring, so that the elastic rope floats up and down when rotating, and always maintains a vertical state with the surface in contact with the foot in different circumferential directions of the foot surface, thereby preventing the elastic rope from falling off. When the present invention is in use, it can also adjust the height according to the different soles of the patient's feet, as well as the horizontal position of the heel, so that the device can adapt to different soles of the feet, so as to achieve the best training effect. The device can also adjust the overall tilt angle of the device, so that the patient's calf can be used lying flat or sitting with the calf tilted.

[0014] When the present invention is used, multiple parameters are adjusted before use according to different patients. First, the overall adjustment of the device is performed. If the user wants to use the device while sitting, the lower leg is tilted and drooped, and the device as a whole needs to be adjusted to a certain angle. First, the extension bracket is pulled out to increase the support area and make the support more stable. Then, the horizontal threaded rod is manually rotated to drive the horizontal slider to slide. When the horizontal slider slides, the supporting plate is driven to rotate through the connecting rod, so that the mechanism on the supporting plate is tilted to a certain angle as a whole to achieve a comfortable angle.

[0015] Then adjust the lifting mechanism according to the size of the patient's foot, manually turn the buckle I to make the short rod at the lower end of the buckle I disengage from the round hole on the side of the lower support rod, then slide the upper support rod up and down to make the round rod at the lower end of the buckle I correspond to the position of the other round holes on the side of the lower support rod, and insert it, so as to adjust the height of the device to make the sole of the foot in a suitable position;

[0016] Then put the elastic rope around the toes, and drive the vertical slider to slide up and down by rotating the vertical threaded rod, thereby tightening or relaxing the elastic rope, thereby increasing or reducing the elastic force of the elastic rope, so that tension training can be performed. Sliding the arc slider on the upper ring can also make the elastic rope drive the toes to pull in different directions. While sliding, the short stick on the vertical frame will slide in the slide groove on the limit ring. Since the slide groove is up and down, the vertical frame floats up and down, so that the elastic rope can remain vertical to the contact surface of the foot when it is rotated to different positions, thereby preventing the elastic rope from falling off, thereby achieving all-round exercise. The spring piece is in contact with the upper ring, which can provide a certain pre-tightening force to prevent the arc slider from sliding when it is not manually turned.

[0017] The beneficial effects of the present invention compared with the prior art are:

[0018] 1. When the present invention is used, strength recovery training of different intensities can be performed according to the needs of patients. The elastic force of the elastic rope can be changed by replacing the elastic rope and manually adjusting the length of the elastic rope, thereby adapting to training environments of different intensities.

[0019] 2. When the present invention is in use, the position of the elastic rope can also be adjusted by a sliding device to meet the multi-angle mobility and strength training of the ankle joint, and when sliding to different positions, the vertical height of the elastic rope can be automatically adjusted through the action of the limiting ring, so that the elastic rope floats up and down when rotating, and always maintains a vertical state with the surface in contact with the foot in different circumferential directions of the foot surface, thereby preventing the elastic rope from falling off.

[0020] 3. When the present invention is in use, the height can be adjusted according to the different soles of the patient's feet, as well as the horizontal position of the heel, so that the device can adapt to different soles of the feet, thereby achieving the best exercise effect; the device can also adjust the overall tilt angle of the device, so that the patient can use it while lying flat on the calf or sitting with the calf tilted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an isometric view of the overall structure of the present invention.

[0022] Figure 2 It is a side view of the overall structure of the present invention.

[0023] Figure 3 It is an isometric view of the force adjustment mechanism of the present invention.

[0024] Figure 4 This is a first perspective view of the force adjustment mechanism of the present invention.

[0025] Figure 5 This is a second viewing angle diagram of the force adjustment mechanism of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the lifting and lowering adjustment mechanism of the present invention.

[0027] Figure 7 For the present invention Figure 6 Magnified view at A in the middle.

[0028] Figure 8 This is a first viewing angle diagram of the position adjustment mechanism of the present invention.

[0029] Fig. 9 This is a second viewing angle diagram of the position adjustment mechanism of the present invention.

[0030] Fig.10 This is a first viewing angle diagram of the angle adjustment mechanism of the present invention.

[0031] Fig.11 This is a second viewing angle diagram of the angle adjustment mechanism of the present invention.

[0032] Fig.12 It is a diagram of the internal structure of the angle adjustment mechanism of the present invention.

[0033] Figure numbers: 1. Upper ring; 2. Limit ring; 3. Arc slider; 4. Spring piece; 5. Side panel; 6. Vertical frame; 7. Vertical slider; 8. Vertical threaded rod; 9. Elastic rope; 10. Upper support rod; 11. Lower support rod; 12. Lower ring; 13. Buckle I; 14. Short shaft; 15. Spring; 16. Support plate; 17. Buckle II; 18. Footrest; 19. Baffle; 20. Strap; 21. Slot; 22. Base; 23. Extension bracket; 24. Connecting rod; 25. Horizontal slider; 26. Horizontal threaded rod. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use. They are only for the convenience of describing the simplified description of the present invention patent, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention patent. In addition, spatially relative terms, such as "below", "below", "below", "above", "above", etc., may be used in the text for the convenience of description to describe the relationship of an element or feature relative to other elements or features as shown in the figure. Spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptors used in the text may also be interpreted accordingly.

[0036] Implementation example Figure 1-Figure 12 As shown, the multi-angle ankle joint training device includes a strength adjustment mechanism, a lifting adjustment mechanism, a position adjustment mechanism, and an angle adjustment mechanism;

[0037] In an optional implementation manner of the embodiment of the present invention, Figure 3 , Figure 4 , Figure 5 As shown, the force adjustment mechanism includes: an upper circular ring 1, a limiting ring 2, an arc slider 3, a spring piece 4, a side plate 5, a vertical frame 6, a vertical slider 7, a spiral vertical threaded rod 8, and an elastic rope 9; the connection point on the limiting ring 2 is locked on the upper circular ring 1 by bolts, the circular arc slider 3 is slidably mounted on the slide rail on the upper circular ring 1, the spring piece 4 is fixedly mounted on both sides of the circular arc slider 3, the bottom of the spring piece 4 contacts the top of the upper circular ring 1, and the side plate 5 is fixedly mounted on the side of the circular arc slider 3; the vertical frame 6 is slidably mounted in the slide groove on the side plate 5, a round rod is provided on the back of the vertical frame 6, the round rod is slidably connected to the slide groove in the middle of the side plate 5, and the round rod is also slidably connected to the slide groove on the limiting ring 2, the vertical slider 7 is slidably mounted in the slide groove on the vertical frame 6, the upper and lower ends of the spiral vertical threaded rod 8 are rotatably mounted in the round hole on the vertical frame 6, the spiral vertical threaded rod 8 is threadedly connected to the vertical slider 7, a part of the elastic rope 9 is inserted in the notch on the vertical frame 6, and the elastic rope 9 is also hung in the notch on the vertical slider 7.

[0038] In an optional implementation manner of the embodiment of the present invention, Figure 6 , Figure 7As shown, the lifting and lowering adjustment mechanism includes: an upper support rod 10, a lower support rod 11, a lower ring 12, a buckle Ⅰ13, a short shaft 14, and a spring 15; the upper end of the upper support rod 10 is fixedly connected to the lower end of the upper ring 1, and the lower end of the upper support rod 10 is provided with a long shaft, which is slidably mounted in a circular hole on the lower support rod 11, and the lower end of the lower support rod 11 is fixedly mounted on the lower ring 12; the buckle Ⅰ13 is slidably mounted on the short shaft 14, and the short rod at the lower end of the buckle Ⅰ13 is inserted into the circular hole on the side of the lower support rod 11, and the short shaft 14 is fixedly mounted on the side of the lower end of the upper support rod 10, and the spring 15 is mounted on the short shaft 14, one end of the spring 15 contacts with the buckle Ⅰ13, and the other end of the spring 15 contacts with the short shaft 14, and the spring 15 generates elastic force.

[0039] In an optional implementation manner of the embodiment of the present invention, Figure 8 , Fig. 9 As shown, the position adjustment mechanism includes: a support plate 16, a buckle II 17, a footrest 18, a baffle 19, a strap 20, and a slot 21; a lower ring 12 is fixedly mounted on the support plate 16, the buckle II 17 is inserted into the round hole on the lower ring 12, and the buckle II 17 is inserted into the round hole on the side of the footrest 18, and a round rod slide is also provided on the lower ring 12, and the footrest 18 is slidably mounted on the round rod slide; the baffle 19 is fixedly mounted on the inner end of the footrest 18, and two straps 20 are provided, one end of the strap 20 is rotatably mounted on the rotating shaft on one side of the footrest 18, and the other end is clamped in the slot 21, and the slot 21 is fixedly mounted on the other side of the footrest 18.

[0040] In an optional implementation manner of the embodiment of the present invention, Fig.10 , Fig.11 , Fig.12 As shown, the angle adjustment mechanism includes: a base 22, an extension bracket 23, a connecting rod 24, a horizontal slider 25, and a horizontal threaded rod 26; a support plate 16 is rotatably mounted on the hinge seat on the base 22; four extension brackets 23 are provided, which are slidably mounted in the slide grooves at the four corners of the base 22 for strengthening the support; one end of the connecting rod 24 is rotatably mounted on the hinge seat under the support plate 16, and the other end of the connecting rod 24 is rotatably mounted on the long axes on both sides of the horizontal slider 25, and the horizontal slider 25 is slidably mounted on the slide groove above the limit ring 2, and both ends of the horizontal threaded rod 26 are rotatably mounted in the circular holes on the base 22, and at the same time, the horizontal threaded rod 26 is threadedly connected to the horizontal slider 25. Since the threaded connection is self-locking, the horizontal slider 25 will not slide without rotating the horizontal threaded rod 26.

[0041] In an optional implementation manner of the embodiment of the present invention, Figure 3 As shown, the shape of the slide groove in the limiting ring 2 is undulating.

[0042] In an optional implementation manner of the embodiment of the present invention, Figure 3 , Figure 4 As shown, the bottom of the spring piece 4 is covered with frosted rubber material.

[0043] In an optional implementation manner of the embodiment of the present invention, Figure 8 , Fig. 9 As shown, the contact surface between the baffle plate 19 and the heel is made of flexible rubber material.

[0044] Working principle: When the present invention is used, multiple parameters are adjusted before use according to different patients. First, the overall adjustment of the device is performed. If you want to use it while sitting, the lower leg is tilted and hanging down, and the device as a whole needs to be adjusted to a certain angle. First, the extension bracket 23 is pulled out to increase the support area and make the support more stable. Then, the horizontal threaded rod 26 is manually rotated to drive the horizontal slider 25 to slide. When the horizontal slider 25 slides, the supporting plate 16 is driven to rotate through the connecting rod 24, so that the mechanism on the supporting plate 16 is tilted at a certain angle as a whole to achieve a comfortable angle.

[0045] Then adjust the lifting mechanism according to the size of the patient's foot, manually turn the buckle I13 to make the short rod at the lower end of the buckle I13 disengage from the round hole on the side of the lower support rod 11, and then slide the upper support rod 10 up and down to make the round rod at the lower end of the buckle I13 correspond to the position of the other round holes on the side of the lower support rod 11, and insert it, so as to adjust the height of the device to make the sole of the foot in a suitable position;

[0046] Then, the elastic rope 9 is put on the toes, and the vertical slider 7 is driven to slide up and down by rotating the vertical threaded rod 8, thereby driving the tightening or relaxation of the elastic rope 9, thereby increasing or reducing the elasticity of the elastic rope 9, so that tension training can be carried out. Sliding the arc slider 3 on the upper ring 1 can also make the elastic rope 9 drive the toes to pull in different directions. While sliding, the short rod on the vertical frame 6 will slide in the slide groove on the limiting ring 2. Since the slide groove is up and down, the vertical frame 6 floats up and down, so that the elastic rope 9 can maintain a vertical state with the foot contact surface when it is rotated to different positions, thereby preventing the elastic rope 9 from falling off, thereby providing all-round exercise. The spring piece 4 is in contact with the upper ring 1, and can provide a certain pre-tightening force, so that the arc slider 3 does not slide when it is not manually dialed.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Multi-angle ankle joint training device, characterized in that: The invention comprises a force adjustment mechanism, a lifting adjustment mechanism, a position adjustment mechanism and an angle adjustment mechanism; the force adjustment mechanism comprises: an upper circular ring (1), a limiting ring (2), an arc slider (3), a spring piece (4), a side plate (5), a vertical frame (6), a vertical slider (7), a screw vertical thread rod (8) and an elastic rope (9); the connection point on the limiting ring (2) is fixed to the upper circular ring (1) by bolts, the arc slider (3) is slidably mounted on the slide rail on the upper circular ring (1), the spring piece (4) is fixedly mounted on both sides of the arc slider (3), the lower side of the spring piece (4) contacts the upper side of the upper circular ring (1), and the side plate (5) is fixedly mounted on the upper side of the arc slider (3). The vertical frame (6) is mounted on the side of the arc slider (3); the vertical frame (6) is slidably mounted in the slide groove on the side plate (5); a round rod is provided on the back of the vertical frame (6); the round rod is slidably connected to the slide groove in the middle of the side plate (5); the round rod is also slidably connected to the slide groove on the limit ring (2); the vertical slider (7) is slidably mounted in the slide groove on the vertical frame (6); the upper and lower ends of the screw vertical thread rod (8) are rotatably mounted in the round hole on the vertical frame (6); the screw vertical thread rod (8) is threadedly connected to the vertical slider (7); a part of the elastic rope (9) is inserted into the notch on the vertical frame (6); and the elastic rope (9) is also hung in the notch on the vertical slider (7).

2. The multi-angle ankle joint strength active training device according to claim 1, characterized in that: The lifting and lowering adjustment mechanism comprises: an upper support rod (10), a lower support rod (11), a lower ring (12), a buckle I (13), a short shaft (14), and a spring (15); the upper end of the upper support rod (10) is fixedly connected to the lower end of the upper ring (1); the lower end of the upper support rod (10) is provided with a long shaft, the long shaft is slidably mounted in a circular hole on the lower support rod (11), and the lower end of the lower support rod (11) is fixedly mounted on the lower ring (12); the buckle I (13) is slidably mounted on the short shaft (14), the short rod at the lower end of the buckle I (13) is inserted into the circular hole on the side of the lower support rod (11), the short shaft (14) is fixedly mounted on the side of the lower end of the upper support rod (10), and the spring (15) is mounted on the short shaft (14), one end of the spring (15) is in contact with the buckle I (13), and the other end of the spring (15) is in contact with the short shaft (14).

3. The multi-angle ankle joint training device according to claim 1, characterized in that: The position adjustment mechanism comprises: a support plate (16), a buckle II (17), a footrest (18), a baffle (19), a binding strap (20), and a slot (21); a lower ring (12) is fixedly mounted on the support plate (16); the buckle II (17) is inserted into a round hole on the lower ring (12); and the buckle II (17) is inserted into a round hole on the side of the footrest (18); a round rod slide rail is also provided on the lower ring (12); and the footrest (18) is slidably mounted on the round rod slide rail; the baffle (19) is fixedly mounted on the inner side end of the footrest (18); two binding straps (20) are provided; one end of the binding strap (20) is rotatably mounted on a rotating shaft on one side of the footrest (18); and the other end is clamped in the slot (21); and the slot (21) is fixedly mounted on the other side of the footrest (18).

4. The multi-angle ankle joint training device according to claim 1, characterized in that: The angle adjustment mechanism comprises: a base (22), an extension bracket (23), a connecting rod (24), a horizontal slider (25), and a horizontal threaded rod (26); a support plate (16) is rotatably mounted on a hinge seat on the base (22); four extension brackets (23) are provided, which are slidably mounted in slide grooves at four corners of the base (22); one end of the connecting rod (24) is rotatably mounted on the hinge seat below the support plate (16), and the other end of the connecting rod (24) is rotatably mounted on the long axis on both sides of the horizontal slider (25); the horizontal slider (25) is slidably mounted on the slide groove above the limit ring (2), and both ends of the horizontal threaded rod (26) are rotatably mounted in the circular holes on the base (22), and the horizontal threaded rod (26) is threadedly connected to the horizontal slider (25).

5. The multi-angle ankle joint training device according to claim 1, characterized in that: The shape of the slide groove in the limiting ring (2) is undulating.

6. The multi-angle ankle joint training device according to claim 1, characterized in that: The bottom of the spring piece (4) is covered with frosted rubber material.

7. The multi-angle ankle joint training device according to claim 3, characterized in that: The contact surface between the baffle plate (19) and the heel is made of flexible rubber material.

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