Adjustable ankle-foot auxiliary support

Abstract

The invention relates to the technical field of ankle-foot supports, and discloses an adjustable ankle-foot auxiliary support which comprises a fixing frame and a rotating frame, a back supporting plate and a fixing cover are fixed to the fixing frame, a foot protector is fixed to the rotating frame, a first restraining assembly is arranged on the foot protector, and a second restraining assembly is arranged on the fixing frame. A traditional hook-and-loop fastener bonding mode is replaced, the first restraining assembly and the second restraining assembly are matched through the tensioning structure, the binding belts, the connecting belt, the pull wire and the like, a user only needs to operate the rotating cap to drive the related rotating shaft to rotate, then the winding wheel can wind the pull wire, and then the first binding belt and the second binding belt are tensioned; the support can be rapidly fixed at the ankle position, a plurality of bridles do not need to be tensioned and bonded one by one, operation is easy and convenient, and time is saved.

Description

Technical Field

[0001] This invention relates to the field of ankle and foot support technology, and more particularly to an adjustable ankle and foot support. Background Technology

[0002] An ankle-foot brace is a brace that extends from the lower leg to the foot, designed to improve motor function, prevent injury, or assist in rehabilitation by fixing, supporting, or adjusting the position of the ankle and foot.

[0003] Existing ankle-foot support braces use a one-piece plastic structure with multiple Velcro straps for fixation. While the evenly distributed straps improve fit and shaping to some extent, significant drawbacks exist in actual use. First, users need to adjust each strap individually, a process that is tedious and time-consuming, especially in emergency situations or when frequent donning and doffing is required, significantly reducing efficiency. Furthermore, adjusting multiple straps demands high finesse from users (such as post-operative patients or those with mobility issues), increasing the difficulty of use. Second, the Velcro, as a core fixation component, suffers from durability issues; its adhesive layer wears down with repeated application, leading to a continuous decrease in adhesion. This results in strap loosening and reduced fit between the brace and ankle, affecting shaping and potentially increasing the risk of secondary injury due to brace displacement.

[0004] Therefore, an adjustable ankle-foot support bracket needs to be designed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an adjustable ankle-foot support.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable ankle and foot support includes a fixed frame and a rotating frame. A back support plate and a fixed cover are fixed on the fixed frame, and a foot protector is fixed on the rotating frame. A first restraint component is provided on the foot protector, and a second restraint component is provided on the fixed frame. The first restraint assembly includes several tensioning structures and a horizontal plate. Each tensioning structure includes a first strap. The ends of several first straps are fixed to the horizontal plate. A second limiting frame is also fixed on the foot guard. A first connecting strap is fixed on the horizontal plate. The first connecting strap passes through the second limiting frame. A first pull wire is fixed to the end of the first connecting strap away from the horizontal plate. The second restraint assembly includes a second strap. A housing is provided on one side of the fixing frame, and a winding assembly is provided inside the housing for tightening or releasing the second strap and several first straps.

[0007] As a preferred embodiment of the present invention, the tensioning structure further includes a first fixing buckle and a first limiting frame. One end of the first strap is fixed to the foot guard, and both the first fixing buckle and the first limiting frame are fixed to the foot guard. The first strap passes through the first fixing buckle and the first limiting frame.

[0008] As a preferred embodiment of the present invention, the second constraint component further includes a second fixing buckle and a third limiting frame. The second fixing buckle and the third limiting frame are both fixed on the fixing frame. One end of the second strap is fixed on the fixing frame. The second strap passes through the second fixing buckle and the third limiting frame. A second connecting strap is fixed to the end of the second strap. The second connecting strap passes through the third limiting frame. A second pull wire is fixed to the end of the second connecting strap away from the second strap.

[0009] As a preferred embodiment of the present invention, the outer shell is fixed to the mounting frame by four support rods, and two wire holes are provided on the outer shell. The first pull wire and the second pull wire pass through the two wire holes respectively and extend into the interior of the outer shell.

[0010] As a preferred embodiment of the present invention, the winding assembly comprises a winding structure, a control structure, and a rotation structure; The winding structure includes a first rotating shaft and a second rotating shaft, both of which are rotatably mounted inside the housing. Two winding wheels are fixed on the first rotating shaft. The end of the first pull wire is fixed on one of the winding wheels, and the end of the second pull wire is fixed on the other winding wheel. A ratchet is fixedly sleeved on the first rotating shaft, and a pawl is fixed on the second rotating shaft. The pawl is connected to the housing through a spring piece. One end of the second rotating shaft extends to the outside of the housing and is fixed with a control handle.

[0011] As a preferred embodiment of the present invention, the control component includes a third rotating shaft and a fourth rotating shaft, both of which are rotatably mounted inside the housing, with the third rotating shaft directly opposite the fourth rotating shaft. A groove is formed at the end of the third rotating shaft, and an opening is formed on the fourth rotating shaft. Both the groove and the opening have rectangular cross-sections. A first gear is fixedly mounted on the third rotating shaft, and a second gear is fixedly mounted on the fourth rotating shaft. The control component also includes a third gear and a fourth gear, both of which are fixedly mounted on the first rotating shaft. The first gear meshes with the third gear, and the second gear meshes with the fourth gear.

[0012] As a preferred embodiment of the present invention, the transmission ratio between gear one and gear three is less than 1, and the transmission ratio between gear two and gear four is greater than 1.

[0013] As a preferred embodiment of the present invention, the rotating structure includes a rotating cap, on which a rotating rod is fixed. The rotating rod passes through the outer shell and is slidably connected to the outer shell. A fixing block is fixed at the end of the rotating rod away from the rotating cap. The fixing block has a rectangular cross-section and is positioned opposite the through-hole and the recess. A spring is fixed on the rotating cap, and a rotating ring is fixed at the end of the spring away from the rotating cap. The rotating ring is rotatably mounted on the outer shell.

[0014] As a preferred embodiment of the present invention, a limiting component is provided on the outer shell to provide a limiting position for the fixing block. The limiting component includes a side plate and a crossbar. The side plate is fixed on the rotating cap and has rotatable ball bearings. The crossbar is fixed on the outer shell and has a first limiting ring and a second limiting ring fixed on it. The side plate is located between the first limiting ring and the second limiting ring.

[0015] As a preferred embodiment of the present invention, the fixed frame and the rotating frame are rotatably connected, and an elastic training component is provided on both the fixed frame and the rotating frame. The elastic training component includes several elastic bands and several hanging rings. Several elastic bands are fixed on the fixed frame, and several hanging rings are fixed on the rotating frame. Each elastic band has a hook fixed at its end.

[0016] The present invention has the following beneficial effects: 1. This adjustable ankle and foot support bracket replaces the traditional Velcro fastening method. The first and second restraint components work together through a tensioning structure, straps, connecting straps, and pull lines. Users only need to operate the rotating cap to drive the relevant rotating shaft to rotate, which will cause the winding wheel to wind up the pull line, thereby tightening the first and second straps. This quickly fixes the bracket at the ankle position without having to tighten and glue multiple straps one by one. It is simple to operate and saves time. It is especially suitable for emergency medical scenarios or operations with high time requirements, and can provide patients with an initial restraint and fixation effect in a timely manner. 2. The bracket has a speed adjustment function for the two winding wheels. In the initial stage of fixation, the third rotating shaft drives the first rotating shaft to rotate quickly, and the winding wheels wind up the cable at high speed, so that the strap is tightened quickly, improving the operation efficiency. After initial tightening, the user presses the rotating cap to change the position of the fixing block, controls the fourth rotating shaft to drive the first rotating shaft to rotate slowly, and the winding wheels slowly wind up the cable. The pressure applied by the strap to the patient increases slowly, which allows the user to accurately adjust the clamping force according to the patient's reaction and needs, avoiding discomfort or injury to the patient due to excessive pressure changes, and taking into account the fixation effectiveness, patient comfort and safety. 3. The support frame is equipped with an elastic training component. The design of the fixed frame and the rotating frame can rotate, replacing the traditional one-piece structure. Patients can actively bend their ankles for rehabilitation training. During training, the hooks of the elastic bands are hung on the rings of the rotating frame. The ankle movement causes the rotating frame to rotate relative to the fixed frame, and the elastic bands are stretched to provide resistance, thus achieving the training effect. Moreover, users can flexibly adjust the resistance by controlling the number of elastic bands hanging on the rotating frame to meet different training intensity needs and help patients better carry out rehabilitation training. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an adjustable ankle-foot support proposed in this invention. Figure 1 ; Figure 2 for Figure 1 Enlarged view of the structure at point A; Figure 3 This is a schematic diagram of the adjustable ankle-foot support structure proposed in this invention. Figure 2 ; Figure 4 This is a schematic diagram of the adjustable ankle-foot support structure proposed in this invention. Figure 3 ; Figure 5 This is a schematic diagram of the structure when the rotating frame rotates relative to the fixed frame; Figure 6 for Figure 5 Enlarged view of the structure at point B; Figure 7 This is a schematic diagram of the outer shell and the rotating structure; Figure 8 This is a schematic diagram of the cross-sectional structure of the outer shell; Figure 9 This is a structural diagram of the winding structure and control structure; Figure 10 This is a schematic diagram of the rotating structure.

[0018] In the diagram: 1. Fixing frame; 11. Back support plate; 12. Fixing cover; 2. Rotating frame; 21. Foot protection; 31. First strap; 32. First fixing buckle; 33. First limiting frame; 34. Horizontal plate; 35. Second limiting frame; 36. First connecting strap; 37. First pull cable; 41. Second fixing buckle; 42. Second strap; 43. Third limiting frame; 44. Second connecting strap; 45. Second pull cable; 51. Outer shell; 511. Support rod; 512. Wire hole; 61. First rotating shaft; 62. Winding wheel; 63. 64. Ratchet; 64. Second pivot; 641. Control handle; 65. Pawl; 71. Third pivot; 711. Sink; 72. Fourth pivot; 721. Through port; 73. Gear 1; 74. Gear 2; 75. Gear 3; 76. Gear 4; 81. Rotating cap; 82. Rotating rod; 83. Fixing block; 84. Rotating ring; 85. Spring; 91. Side plate; 911. Ball bearing; 92. Crossbar; 93. First limiting ring; 94. Second limiting ring; 101. Elastic band; 102. Hook; 103. Hanging ring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-10 An adjustable ankle and foot support bracket includes a fixed frame 1 and a rotating frame 2, which are rotatably connected. The rotatable design allows the user's ankle to move freely, facilitating rehabilitation training. A back support plate 11 and a fixing cover 12 are fixed on the fixed frame 1. The fixing cover 12 is shaped to fit the natural curve of the human ankle, making it easy to wear. The back support plate 11 supports the fixed frame 1. When the user lies supine on the bed, the back support plate 11 fits against the bed. The back support plate 11 is a flat plate structure, which prevents the fixed frame 1 from easily shaking. A foot brace 21 is fixed on the rotating frame 2. When wearing the bracket, the user's foot is placed on the foot brace 21. The foot brace 21 is provided with a first restraint component, and the fixed frame 1 is provided with a second restraint component. When wearing the bracket, the user uses the first restraint component and the second restraint component to fix the bracket at the ankle position. The first restraint assembly consists of several tensioning structures and a horizontal plate 34. Each tensioning structure is arranged on the foot protector 21. Each tensioning structure includes a first strap 31, a first fixing buckle 32, and a first limiting frame 33. One end of the first strap 31 is fixed to the foot protector 21. The first fixing buckle 32 and the first limiting frame 33 are both fixed to the foot protector 21. The first strap 31 passes through the first fixing buckle 32 and the first limiting frame 33. Figure 3As shown, the first strap 31 passes through the first fixing buckle 32, then bends in the opposite direction and passes through the first limiting frame 33. In this case, when the end of the first strap 31 is tightened, the first strap 31 can gather the foot protector 21, so that the foot protector 21 fits the user's foot and achieves fixed wearing. The setting of the first limiting frame 33 can provide restraint for the first strap 31 and prevent the first strap 31 from shifting position during the retraction and extension process. The horizontal plate 34 is a long strip structure and is set on one side of the foot protector 21. The ends of several first straps 31 are fixed to the horizontal plate 34. A second limiting frame 35 is also fixed to the foot protector 21. A first connecting strap 36 is fixed to the horizontal plate 34. The first connecting strap 36 passes through the second limiting frame 35. The second limiting frame 35 provides a limit to the first connecting strap 36, causing the first connecting strap 36 to apply tension to the horizontal plate 34 in a pre-designed direction. The end of the first connecting strap 36 away from the horizontal plate 34 is fixed with a... The first pull cord 37, when pulled, pulls the first connecting belt 36, causing the first connecting belt 36 to pull the horizontal plate 34, ultimately causing the horizontal plate 34 to pull several first straps 31. The second constraint assembly includes a second fixing buckle 41, a second strap 42, and a third limiting frame 43. The second fixing buckle 41 and the third limiting frame 43 are both fixed to the fixing frame 1. One end of the second strap 42 is fixed to the fixing frame 1, and the second strap 42 passes through the second fixing buckle 41 and the third limiting frame 43. Figure 1 and Figure 3 As shown, the second strap 42 passes through the second fixing buckle 41 and then bends in the opposite direction. In this case, when the end of the second strap 42 is tightened, the second strap 42 can press the user's lower leg tightly against the fixing cover 12 to achieve a fixed wearing. The end of the second strap 42 is fixed with a second connecting strap 44. The second connecting strap 44 passes through a third limiting frame 43. The third limiting frame 43 provides a limit for the second connecting strap 44, so that the second connecting strap 44 can only apply tension to the second strap 42 in a pre-designed direction. The end of the second connecting strap 44 away from the second strap 42 is fixed with a second pull wire 45. When the second pull wire 45 is pulled, the second pull wire 45 will pull the second connecting strap 44, causing the second connecting strap 44 to pull the second strap 42. A housing 51 is provided on one side of the fixing frame 1. The housing 51 is fixed to the fixing frame 1 by four support rods 511. The four support rods 511 provide a gap between the housing 51 and the fixing frame 1. Two wire holes 512 are provided on the housing 51. The first pull wire 37 and the second pull wire 45 pass through the two wire holes 512 respectively and extend into the housing 51. A winding assembly is provided inside the housing 51 for winding or releasing the first pull wire 37 and the second pull wire 45. The winding assembly consists of a winding structure, a control structure, and a rotation structure. The winding structure includes a first rotating shaft 61 and a second rotating shaft 64. Both the first rotating shaft 61 and the second rotating shaft 64 are rotatably mounted inside the housing 51. Two winding wheels 62 are fixed on the first rotating shaft 61. The end of the first pull wire 37 is fixed on one of the winding wheels 62, and the end of the second pull wire 45 is fixed on the other winding wheel 62. When the first rotating shaft 61 rotates... Two winding wheels 62 rotate accordingly, winding the first pull cable 37 and the second pull cable 45. A ratchet 63 is fixedly sleeved on the first rotating shaft 61, and a pawl 65 is fixed on the second rotating shaft 64. The pawl 65 is connected to the outer shell 51 through a spring. The design of the spring makes the pawl 65 always tend to engage with the ratchet 63. The ratchet 63 and the pawl 65 achieve one-way locking of the first rotating shaft 61, so that the first rotating shaft 61 can only rotate in one direction and cannot reverse. One end of the second rotating shaft 64 extends to the outside of the outer shell 51 and is fixed with a control handle 641. When it is necessary to release the lock, the user presses the control handle 641, which drives the pawl 65 to rotate through the second rotating shaft 64 until the pawl 65 separates from the ratchet 63. Without the constraint of the pawl 65, the ratchet 63 can rotate in the opposite direction, releasing the first pull cable 37 and the second pull cable 45. The control assembly includes a third rotating shaft 71 and a fourth rotating shaft 72, both rotatably mounted inside the housing 51, with the third rotating shaft 71 directly opposite the fourth rotating shaft 72. A recess 711 is formed at the end of the third rotating shaft 71, and a through-hole 721 is formed on the fourth rotating shaft 72. Both the recess 711 and the through-hole 721 have rectangular cross-sections. A gear 1 73 is fixedly mounted on the third rotating shaft 71, and a gear 2 74 is fixedly mounted on the fourth rotating shaft 72. The control assembly also includes a gear 3 75 and a gear 4 76, both fixedly mounted on the first rotating shaft 61. Gear 1 73 meshes with gear 3 75, and gear 2 74 meshes with gear 4 76. The transmission ratio of gear 5 is less than 1, while the transmission ratio of gear 2 74 and gear 4 76 is greater than 1. When the third shaft 71 rotates, it can drive the first shaft 61 to rotate through gear 1 73 and gear 3 75. Since the transmission ratio of gear 1 73 and gear 3 75 is less than 1, the first shaft 61 will rotate rapidly and drive the two winding wheels 62 to rotate at high speed, thus achieving rapid winding of the first pull wire 37 and the second pull wire 45. Furthermore, when the fourth shaft 72 rotates, it can drive the first shaft 61 to rotate through gear 2 74 and gear 4 76. Since the transmission ratio of gear 2 74 and gear 4 76 is greater than 1, the first shaft 61 will rotate slowly, and the two winding wheels 62 will also rotate slowly. The rotating structure includes a rotating cap 81, on which a rotating rod 82 is fixed. The rotating rod 82 passes through the outer shell 51 and is slidably connected to the outer shell 51. A fixing block 83 is fixed to the end of the rotating rod 82 away from the rotating cap 81. The fixing block 83 has a rectangular cross-section and is positioned opposite the through-hole 721 and the sink 711. A spring 85 is fixed to the rotating cap 81. A rotating ring 84 is fixed to the end of the spring 85 away from the rotating cap 81. The rotating ring 84 is rotatably mounted on the outer shell 51. In the initial state, the fixing block 83 is located in the through-hole 721. At this time, the fixing block 83 can drive the fourth rotating shaft 72 to rotate. When the rotating cap 81 is pushed, the rotating cap 81 can drive the rotating rod 82 and the fixing block 83 to move, so that the fixing block 83 moves from the through-hole 721 to the sink 711. At this time, the fixing block 83 can drive the third rotating shaft 71 to rotate. Therefore, the user can control the position of the fixing block 83 to make the two winding wheels 62 rotate at different speeds. When using the bracket proposed in this invention, after the user wears the bracket at the ankle, they can turn the rotating cap 81. When the rotating cap 81 rotates, it drives the fixing block 83 to rotate through the rotating rod 82. Since the fixing block 83 is initially located in the sink 711, the fixing block 83 can drive the third rotating shaft 71 to rotate. When the third rotating shaft 71 rotates, it drives the first rotating shaft 61 to rotate through the meshing gear 1 73 and gear 3 75, thereby causing the two winding wheels 62 to rotate. When the two winding wheels 62 rotate, they respectively wind the first pull wire 37 and the second pull wire 45, which makes the first pull wire 37 tighten the first connecting strap 36 and the second pull wire 45 tighten the second connecting strap 44. In this case, several first straps 31 will press against the patient's instep, and the second straps 42 will press against the patient's calf, achieving quick fixation of the bracket. This design replaces the traditional Velcro fastening method, eliminating the need to tighten and fasten multiple straps one by one, making the operation convenient. In addition, the present invention also has the function of adjusting the speed of the two winding wheels 62. In the initial stage of fixing, the user can control the rotation of the first rotating shaft 61 through the third rotating shaft 71. Since the transmission ratio of gear 1 73 and gear 3 75 is less than 1, the first rotating shaft 61 will rotate rapidly and drive the two winding wheels 62 to rotate at high speed. In this case, the two winding wheels 62 can quickly wind up the first pull wire 37 and the second pull wire 45, so that the second bundle 42 and several first bundles 31 are quickly tightened. After initial tightening, the user presses the rotating cap 81 to bring the rotating cap 81 close to the outer shell 51. When moving, the rotating rod 82 can drive the fixed block 83 to move, causing the fixed block 83 to move out of the through-hole 721 until the fixed block 83 is inserted into the recess 711. In this case, the user controls the rotating cap 81 to rotate while keeping it pressed down, which in turn causes the fixed block 83 to drive the fourth rotating shaft 72 to rotate. When the fourth rotating shaft 72 rotates, it can drive the first rotating shaft 61 to rotate through the meshing gears 2 74 and 4 76. Since the transmission ratio of gears 2 74 and 4 76 is greater than 1, the first rotating shaft 61 will rotate slowly, and the two winding wheels 62 will also rotate slowly. During this process, the pressure applied to the patient by the second strap 42 and several first straps 31 gradually increases, allowing the user to precisely adjust the clamping force of the second strap 42 and several first straps 31. In summary, in the initial fixation stage, the first rotating shaft 61 can rotate rapidly, thereby driving the two winding wheels 62 to rotate at high speed, quickly winding the first pull wire 37 and the second pull wire 45, so that the second strap 42 and several first straps 31 are quickly tightened. This process greatly saves the initial operation time, improves the overall operation efficiency, and allows the user to quickly complete the initial fixation action, especially in some emergency medical scenarios or when time is of the essence. In operations requiring high precision, it can provide patients with initial restraint or fixation in a timely manner. After initial tightening, the user presses the rotating cap 81, causing the two winding wheels 62 to rotate slowly. During this process, the pressure applied to the patient by the second strap 42 and several first straps 31 will increase slowly. This slow pressure change gives the user sufficient time and precise control, allowing for precise adjustment of the strap's tension according to the patient's specific reaction and actual needs. This avoids discomfort or injury to the patient due to excessively rapid pressure changes, ensuring both the effectiveness of fixation and the patient's comfort and safety. A limiting assembly is provided on the outer casing 51 to provide a limit for the fixing block 83. The limiting assembly includes a side plate 91 and a crossbar 92. The side plate 91 is fixed to the rotating cap 81 and has a rotatable ball bearing 911. The crossbar 92 is fixed to the outer casing 51 and has a first limiting ring 93 and a second limiting ring 94. The side plate 91 is located between the first limiting ring 93 and the second limiting ring 94. In the initial state, under the elastic force of the spring 85, the ball bearing 911 on the side plate 91 is positioned relative to the first limiting ring 94. In the state of contact of the three phases, the fixing block 83 is located in the through opening 721. When the user pushes the rotating cap 81, the side plate 91 moves with the rotating cap 81. When the fixing block 83 is inserted into the recess 711, the ball bearing 911 on the side plate 91 just contacts the second limiting ring 94. Therefore, the user can accurately control the position of the fixing block 83 according to the first limiting ring 93 and the second limiting ring 94, which makes it convenient to adjust the speed of the first rotating shaft 61. In addition, the setting of the ball bearing 911 can reduce the frictional resistance encountered by the side plate 91 when it rotates. An elastic training component is jointly provided on both the fixed frame 1 and the rotating frame 2. The elastic training component includes several elastic bands 101 and several hanging rings 103. The elastic bands 101 are all fixed on the fixed frame 1, and the hanging rings 103 are all fixed on the rotating frame 2. Each elastic band 101 has a hook 102 fixed to its end, forming a structure as follows: Figure 1 and Figure 2 As shown, the ankle-foot brace proposed in this invention has an auxiliary training function. When wearing the brace, patients can perform rehabilitation training by actively bending their ankles. Specifically, the ankle-foot brace proposed in this invention replaces the traditional one-piece brace structure. The fixed frame 1 and the rotating frame 2 adopt a rotatable design, allowing the patient to control ankle movement. When the patient's ankle moves, the rotating frame 2 rotates relative to the fixed frame 1. During training, the patient can hang the hook 102 on the elastic band 101 on the hanging ring 103. When the rotating frame 2 rotates relative to the fixed frame 1, the elastic band 101 is stretched. At this time, the elastic band 101 can provide resistance to the rotation of the rotating frame 2, so that the patient's ankle feels resistance, thereby achieving the training effect. Furthermore, the user can also control the number of elastic bands 101 hanging on the rotating frame 2 to control the resistance.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adjustable ankle-foot support bracket, characterized in that, It includes a fixed frame (1) and a rotating frame (2). The fixed frame (1) is fixed with a back support plate (11) and a fixed cover (12). The rotating frame (2) is fixed with a foot guard (21). The foot guard (21) is provided with a first restraint component. The fixed frame (1) is provided with a second restraint component. The first constraint assembly includes several tensioning structures and a horizontal plate (34). Each tensioning structure includes a first strap (31). The ends of several first straps (31) are fixed to the horizontal plate (34). A second limiting frame (35) is also fixed to the foot guard (21). A first connecting strap (36) is fixed to the horizontal plate (34). The first connecting strap (36) passes through the second limiting frame (35). A first pull wire (37) is fixed to one end of the first connecting strap (36) away from the horizontal plate (34). The second constraint assembly includes a second strap (42). The fixing frame (1) has a housing (51) on one side, and a winding assembly is provided inside the housing (51) for tightening or releasing the second strap (42) and several first straps (31).

2. The adjustable ankle-foot support according to claim 1, characterized in that, The tensioning structure also includes a first fixing buckle (32) and a first limiting frame (33). One end of the first strap (31) is fixed to the foot guard (21). The first fixing buckle (32) and the first limiting frame (33) are both fixed to the foot guard (21). The first strap (31) passes through the first fixing buckle (32) and the first limiting frame (33).

3. An adjustable ankle-foot support according to claim 2, characterized in that, The second constraint assembly also includes a second fixing buckle (41) and a third limiting frame (43). The second fixing buckle (41) and the third limiting frame (43) are both fixed on the fixing frame (1). One end of the second strap (42) is fixed on the fixing frame (1). The second strap (42) passes through the second fixing buckle (41) and the third limiting frame (43). A second connecting strap (44) is fixed to the end of the second strap (42). The second connecting strap (44) passes through the third limiting frame (43). A second pull wire (45) is fixed to the end of the second connecting strap (44) away from the second strap (42).

4. An adjustable ankle-foot support according to claim 3, characterized in that, The outer shell (51) is fixed to the mounting bracket (1) by four support rods (511). Two wire holes (512) are opened on the outer shell (51). The first pull wire (37) and the second pull wire (45) pass through the two wire holes (512) respectively and extend into the interior of the outer shell (51).

5. An adjustable ankle-foot support according to claim 3, characterized in that, The winding assembly consists of a winding structure, a control structure, and a rotation structure. The winding structure includes a first rotating shaft (61) and a second rotating shaft (64). Both the first rotating shaft (61) and the second rotating shaft (64) are rotatably mounted inside the outer casing (51). Two winding wheels (62) are fixed on the first rotating shaft (61). The end of the first pull wire (37) is fixed on one of the winding wheels (62), and the end of the second pull wire (45) is fixed on the other winding wheel (62). A ratchet (63) is fixedly sleeved on the first rotating shaft (61), and a pawl (65) is fixed on the second rotating shaft (64). The pawl (65) is connected to the outer casing (51) through a spring. One end of the second rotating shaft (64) extends to the outside of the outer casing (51) and is fixed with a control handle (641).

6. An adjustable ankle-foot support according to claim 5, characterized in that, The control component includes a third rotating shaft (71) and a fourth rotating shaft (72). The third rotating shaft (71) and the fourth rotating shaft (72) are rotatably installed inside the outer casing (51), and the third rotating shaft (71) is positioned directly opposite the fourth rotating shaft (72). A groove (711) is provided at the end of the third rotating shaft (71), and a through-hole (721) is provided on the fourth rotating shaft (72). The cross-sections of the groove (711) and the through-hole (721) are both rectangular. A gear 1 (73) is fixedly sleeved on the third rotating shaft (71), and a gear 2 (74) is fixedly sleeved on the fourth rotating shaft (72). The control component also includes a gear 3 (75) and a gear 4 (76). The gear 3 (75) and the gear 4 (76) are both fixedly sleeved on the first rotating shaft (61). The gear 1 (73) meshes with the gear 3 (75), and the gear 2 (74) meshes with the gear 4 (76).

7. An adjustable ankle-foot support according to claim 6, characterized in that, The transmission ratio between gear 1 (73) and gear 3 (75) is less than 1, and the transmission ratio between gear 2 (74) and gear 4 (76) is greater than 1.

8. An adjustable ankle-foot support according to claim 6, characterized in that, The rotating structure includes a rotating cap (81), on which a rotating rod (82) is fixed. The rotating rod (82) passes through the outer shell (51) and is slidably connected to the outer shell (51). A fixing block (83) is fixed at the end of the rotating rod (82) away from the rotating cap (81). The cross-section of the fixing block (83) is rectangular. The fixing block (83) is positioned opposite the through-hole (721) and the recess (711). A spring (85) is fixed on the rotating cap (81). A rotating ring (84) is fixed at the end of the spring (85) away from the rotating cap (81). The rotating ring (84) is rotatably mounted on the outer shell (51).

9. An adjustable ankle-foot support according to claim 8, characterized in that, The outer shell (51) is provided with a limiting component for limiting the fixed block (83). The limiting component includes a side plate (91) and a crossbar (92). The side plate (91) is fixed on the rotating cap (81). The side plate (91) is provided with a rotatable ball bearing (911). The crossbar (92) is fixed on the outer shell (51). The crossbar (92) is fixed with a first limiting ring (93) and a second limiting ring (94). The side plate (91) is located between the first limiting ring (93) and the second limiting ring (94).

10. An adjustable ankle-foot support according to claim 1, characterized in that, The fixed frame (1) and the rotating frame (2) are rotatably connected. An elastic training component is provided on both the fixed frame (1) and the rotating frame (2). The elastic training component includes several elastic bands (101) and several hanging rings (103). Several elastic bands (101) are fixed on the fixed frame (1), and several hanging rings (103) are fixed on the rotating frame (2). Each elastic band (101) has a hook (102) fixed at its end.

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