Knee hyperextension prevention brace and matched training device

Abstract

The invention relates to the technical field of rehabilitation training instruments, in particular to a support for preventing knee hyperextension and a matched training device, and aims to solve the problems that a hemiplegic patient is prone to knee hyperextension and single in equipment function in rehabilitation training, the support comprises a bottom frame and a thigh fixing frame, rotating connection is achieved through a connecting part, and knee hyperextension is prevented through a limiting part. The matched training device comprises a pedal, a supporting pipe, a butt joint frame and a resistance component, reverse resistance is provided for training leg muscles, a connecting component and a limiting component are adjustable, the requirements of patients with different leg lengths are met, the supporting component assists the patients in sitting and repeated standing training, the training safety and effectiveness are improved, and the training efficiency is improved. Body adjusting supporting and muscle training are provided during initial training of a hemiplegic patient, knee hyperextension is prevented, the opening and closing angles of thighs and shanks are stably limited during later walking training, the requirements of different stages are met, and rehabilitation of the patient is assisted.

Description

Technical Field

[0001] This invention relates to the field of rehabilitation training equipment technology, and in particular to a brace for preventing knee hyperextension and a training device for it. Background Technology

[0002] Hemiplegia is a common sequela of neurological diseases, usually caused by stroke, traumatic brain injury, etc., which leads to impaired motor function on one side of the body, seriously affecting the patient's daily living self-care ability and quality of life. In the rehabilitation treatment of hemiplegic patients, standing training and leg flexion and extension training are crucial links. Standing training helps restore the patient's balance, strengthen lower limb muscles, and improve body stability and coordination, laying the foundation for subsequent walking training. Leg flexion and extension training mainly targets the recovery of knee joint function. By regularly flexing and extending the legs, the range of motion of the knee joint can be increased, joint stiffness and muscle atrophy can be prevented, and the reconstruction of lower limb motor function can be promoted. However, hemiplegic patients often face many difficulties when performing standing and leg flexion / extension training. Due to weakened muscle strength and decreased control in the affected limb, patients have difficulty maintaining balance while standing and are prone to knee hyperextension (excessive flexion of the knee joint). Knee hyperextension not only increases pressure on the knee joint, leading to joint pain and injury, but also affects the training effect and hinders the recovery of the patient's lower limb motor function. In addition, most existing rehabilitation training equipment has only one function and cannot simultaneously meet the needs of patients in the early stages of rehabilitation training to adjust their body support function during standing training, the inconvenience of adding appropriate resistance load during training, and the prevention of knee hyperextension during leg flexion / extension training when they can walk independently in the later stages. To address the aforementioned problems, this invention proposes a brace for preventing knee hyperextension and a training device to assist in its application. Summary of the Invention

[0003] This invention provides a brace for preventing knee hyperextension and a training device that addresses the problems of knee hyperextension in rehabilitation training for hemiplegic patients and the limited functionality of existing training equipment.

[0004] This invention provides the following technical solution: A knee hyperextension brace, comprising: The base frame and thigh fixing frame are provided. Connecting bolts are fixed to the bottom of both sides of the base frame, and connecting nuts are threaded onto the connecting bolts. The lower leg fixation frame is fixedly connected to the inner side of the base frame. The lower leg fixation frame is used to tie the patient's lower leg, and the thigh fixation frame is used to tie the patient's thigh. The lower leg fixation frame is fixedly connected to a lower strap and a lower retractable frame on one side. The lower strap passes through the lower retractable frame and is detachably connected to the lower retractable frame via Velcro. The thigh fixation frame is fixedly connected to an upper strap and an upper retractable frame on one side. The upper strap passes through the upper retractable frame and is detachably connected to the upper retractable frame via Velcro. Two connecting parts are symmetrically fixed to the top of the base frame. Both connecting parts are connected to one side of the bottom of the thigh fixation frame to realize the rotational connection between the base frame and the thigh fixation frame. Two limiting components are respectively installed on the two connecting components to limit the extension angle between the lower leg and the thigh during the patient's standing training, so as to prevent the patient from having knee hyperextension problems.

[0005] In one possible design, the connecting component includes a first connecting cover fixed to the top of the base frame, a first connecting plate slidably connected inside the first connecting cover, a hinge shaft fixedly connected through the first connecting plate, and a limiting component installed at one end of the hinge shaft. A second connecting plate is rotatably connected to the hinge shaft, and a second connecting cover is slidably fitted onto the second connecting plate. The second connecting cover is fixedly connected to one side of the bottom of the thigh fixation frame. A limiting groove is provided on the second connecting plate, and one side of the limiting component extends into the corresponding limiting groove to limit the rotation angle of the second connecting plate; The first connecting cover and the second connecting plate are hinged through the hinge shaft, so that the base frame and the thigh fixation frame can rotate around the two hinge shafts, which can adapt to the leg rotation movement of the patient during leg flexion and extension training and provide auxiliary support for the patient's leg.

[0006] In one possible design, a first insert rod is slidably connected through one side of the inner wall of the first connecting cover, and a plurality of first positioning holes are equally spaced on the first connecting cover, and the first insert rod is detachably inserted into the plurality of first positioning holes. The first insertion rod is fitted with a first tension spring located outside the first connecting cover. The two ends of the first tension spring are respectively fixed to one side of the first connecting cover and one end of the first insertion rod by pull hooks. A second insert rod is slidably connected through one side of the inner wall of the second connecting cover. Multiple second positioning holes are equally spaced on the second connecting plate. The second insert rod is detachably inserted into the multiple second positioning holes. The second insertion rod is fitted with a second tension spring located outside the second connecting cover. The two ends of the second tension spring are respectively fixed to one side of the second connecting cover and one end of the second insertion rod via hooks. Specifically, the first insertion rod is pulled into the corresponding first positioning hole by the reset action of the first tension spring, thereby positioning the first connecting cover and the first connecting plate. The second insertion rod is pulled into the corresponding second positioning hole by the reset action of the second tension spring, thereby positioning the second connecting plate and the second connecting cover. This stabilizes and fixes the position of the base frame and the thigh fixation frame, adapting to the usage needs of patients with different leg lengths.

[0007] In one possible design, the limiting component includes a fastening bolt fixed to one end of the hinge shaft, an adjusting bracket sleeved on the fastening bolt, and an anti-slip pad fixed to one side of the first connecting plate, the anti-slip pad being used to limit the adjusting bracket; A limiting frame is fixedly connected to the adjusting frame, and one side of the limiting frame extends into the corresponding limiting groove to limit the second connecting plate. The fastening bolt is threaded with a fastening nut, which is used to press and fix the adjustment frame. The mechanism involves rotating the adjusting frame to drive the limiting frame in an arc-shaped motion, thereby adjusting the position of the limiting frame within the limiting groove. When the second connecting plate rotates with the thigh fixing frame until it contacts the inner wall of the limiting groove, it prevents the second connecting plate from continuing to rotate, thus limiting the opening and closing angle of the thigh and calf and preventing knee hyperextension. The adjusting frame is clamped and fixed by the cooperation of the fastening nut and the anti-slip pad to ensure the stability of the limiting frame position.

[0008] A training device for use with the aforementioned knee hyperextension brace includes two pedals for supporting the patient's left and right feet respectively. Two support tubes are symmetrically fixed to the top of the pedal. An adjusting rod is slidably connected inside the support tube. The tops of the two adjusting rods extend to the top of the corresponding support tube and are fixed to the same docking frame. The base frame is fastened to the top of the corresponding docking frame. Two connecting lugs are symmetrically fixed to the docking frame. The connecting bolts pass through the corresponding connecting lugs and are fixed to the connecting lugs by connecting nuts. One side of each of the two support tubes is provided with a resistance component, which is used to provide reverse resistance to the patient's thighs during standing training, providing load for leg muscle training and helping the patient recover leg strength.

[0009] In one possible design, the resistance component includes a support frame fixed to one side of two support tubes, a movable plate slidably connected through the support frame, an mounting rod fixed to one side of the movable plate, and one side of the mounting rod fixed to one side of the docking frame. A limiting ring is fixedly connected to the top of the movable plate, and a movable frame is slidably connected inside the limiting ring. A force-bearing plate is fixedly connected to the side of the movable frame near the thigh fixation frame. The movable frame is provided with an elastic component, one side of which is fixedly connected to one side of the limiting ring. During the standing training, the patient rotates the thigh fixation frame vertically, which contacts the force plate and pushes it to move. The elastic force of the elastic component provides reverse resistance to the force plate through the moving frame, thereby applying resistance to the patient's thigh and achieving leg muscle training.

[0010] In one possible design, the elastic component includes a first connecting frame fixed to one side of the limiting ring and a second connecting frame fixed to the inner wall of one side of the movable frame, and also includes a first insert plate and a second insert plate, wherein the first insert plate is detachably inserted into the first connecting frame and the second insert plate is detachably inserted into the second connecting frame. The first insert plate and the second insert plate are fixedly connected to the same telescopic tube. A fourth tension spring is sleeved on the telescopic tube. The two ends of the fourth tension spring are respectively fixedly connected to the side of the first insert plate and the second insert plate that are close to each other by pull hooks. The first insert plate, the second insert plate, the telescopic tube, and the fourth tension spring constitute a detachable independent unit. Multiple sets of this unit with different elasticity specifications are provided for patients to choose from. When the mobile frame moves, the second insert plate stretches the fourth tension spring, and the elasticity of the fourth tension spring provides reverse resistance to adapt to the resistance needs of patients at different training stages.

[0011] In one possible design, a third insert rod is slidably connected through the top inner wall of one side of the support tube, and multiple positioning slots are equally spaced on one side of the adjusting rod, and the third insert rod is detachably snapped into the multiple positioning slots; The third insertion rod is fitted with a third tension spring located outside the support tube. The two ends of the third tension spring are respectively fixed to one end of the third insertion rod and the top of one side of the support tube by pull hooks. When adjusting the height of the docking frame according to the length of the patient's lower leg, the adjusting rod is pulled to slide inside the support tube. After the adjustment is completed, the third tension spring resets and drives the third insertion rod to insert into the corresponding positioning slot, thereby achieving the positioning and braking of the adjusting rod and stabilizing the height of the docking frame.

[0012] In one possible design, a base is also included, with the two pedals symmetrically arranged on top of the base; The base has two symmetrical sliding grooves on its top. Slide rails are fixedly connected to the inner walls of both sides of the sliding grooves. Slider blocks are slidably connected to the slide rails. The tops of the two slider blocks are fixedly connected to the bottom of the pedal. A handrail is fixedly connected to the top of the base, and two limiting rods are symmetrically fixedly connected to the top of the base. A sliding sleeve is slidably fitted on the limiting rod, and one side of the sliding sleeve is fixedly connected to one side of the pedal. A positioning bolt is threaded through the inner wall of the top of the sliding sleeve, and the positioning bolt is clamped and fixed with the limiting rod; A support component is provided on one side of the base to provide sitting support for the patient's body; The pedal slides along the slide rail through the cooperation of the slider and the slide rail. After being adjusted to a position suitable for the patient's legs, it is fixed by clamping the limiting rod with positioning bolts. The handrail provides support for the patient's hands, ensuring the patient's body stability during standing training and improving training safety.

[0013] In one possible design, the support component includes a mounting bracket fixed to one side of the base, on which two movable rods are symmetrically slidably connected, and the top ends of the two movable rods are fixed to the same seat plate for the patient to sit on. The bottom ends of the two movable rods are fixed to the same transmission frame, which passes through the mounting frame and is slidably connected to the mounting frame. The top of the transmission frame has two drive frames symmetrically and slidably connected. A rotating rod is rotatably connected to the drive frame, and the top end of the rotating rod is rotatably connected to the mounting frame through a pin. The top of the transmission frame is rotatably connected to a bidirectional screw. The two drive frames are fixedly connected to each other on their adjacent sides. The bidirectional screw has two symmetrically arranged threaded grooves with opposite thread directions. The bidirectional screw passes through the two drive frames and the two transmission nuts, and is threadedly connected to the two transmission nuts through the two threaded grooves respectively. When the bidirectional screw is rotated, the two drive frames move closer or further apart through the threaded transmission with the two transmission nuts, which in turn drives the rotating rod to rotate, pulling the transmission frame and the moving rod up and down to adjust the height of the seat plate to suit the patient's leg strength and assist the patient in completing repetitive standing training.

[0014] In this invention, during the initial training of a hemiplegic patient who cannot walk independently, the base frame is first attached to the connecting frame. Based on the patient's leg length, the connecting frame is pulled to slide the adjusting rod within the support tube. After adjusting to a suitable height, the third tension spring drives the third insert rod to insert into the positioning groove of the adjusting rod, completing the height positioning of the connecting frame. Next, according to the patient's leg's suitable position, the pedal is pushed to slide within the groove of the base. The slider moves along the slide rail, and the sliding sleeve slides on the limiting rod. After adjustment, the positioning bolt is twisted to clamp the limiting rod, completing the pedal positioning. The patient then sits on the seat. On the board, rotate the bidirectional screw according to the patient's leg strength. Through the threaded transmission with the two drive nuts, the two drive frames move, which in turn rotates the rotating rod, pulling the transmission frame and the moving rod to adjust the seat plate to a suitable height. Then, strap the lower leg fixation frame to the patient's lower leg, pass the lower strap through the lower retractable frame, and attach it using Velcro and Velcro fasteners. Strap the thigh fixation frame to the patient's thigh, pass the upper strap through the upper retractable frame, and attach it using Velcro and Velcro fasteners. Move the base frame and thigh fixation frame so that the two hinge axes are at the knee. On both sides, corresponding to the knee rotation area, after adjusting the position according to the patient's leg length, release the first and second insert rods. The first tension spring pulls the first insert rod into the first positioning hole of the first connecting cover, and the second tension spring pulls the second insert rod into the second positioning hole of the second connecting plate, completing the positioning of the base frame and thigh fixation frame. Rotate the adjusting frame to drive the limiting frame to move in an arc shape, adjusting the position of the limiting frame so that when the second connecting plate rotates, the inner wall of the limiting groove on the side closest to the second connecting cover contacts the limiting frame and prevents the second connecting plate from continuing to rotate. After adjustment, turn the fastening screw. The mother moves closer to the adjustment frame, using the fastening nut and anti-slip pad to clamp the adjustment frame, completing the limiting frame limit. The patient steps on the pedal with both feet and holds the handrail with both hands to perform standing training. The thigh fixation frame rotates vertically to contact the force plate, causing the force plate to move. The moving frame slides within the limiting ring. The second insert plate stretches the fourth tension spring. The elastic force of the fourth tension spring provides reverse resistance to the moving frame, preventing the thigh fixation frame from rotating vertically and providing reverse resistance to the patient's thigh, training the leg muscles. At the same time, the limiting component prevents the patient from experiencing knee hyperextension during standing training. During the later stages of independent walking training, by twisting the fastening nut to disengage it from the corresponding connecting ear plate, the base frame can be removed from the docking frame and individually strapped to the patient. Simultaneously, the thigh fixation frame is also strapped to the patient's thigh. Rotating the adjustment frame causes the limiting frame to move in an arc, thus adjusting its position. When the second connecting plate rotates, the inner wall of the limiting groove near the second connecting cover contacts the limiting frame, preventing further rotation of the second connecting plate. This limits the opening angle between the thigh and calf muscles as the patient's leg extends to a certain angle, preventing knee hyperextension during walking training. After adjusting the position of the limiting frame, the fastening nut can be rotated closer to the adjustment frame until it is clamped and positioned using the fastening nut and anti-slip pad, thus limiting the limiting frame. This ensures stable limiting of the opening angle between the patient's thigh and calf muscles during each standing training session, effectively preventing knee hyperextension during independent walking.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0016] Beneficial effects: 1. By setting the limiting component, the angle between the lower leg and thigh can be limited when the patient is performing standing training, which can effectively prevent the patient from having knee hyperextension during standing training, protect the patient's knee joint, avoid secondary damage caused by hyperextension, and help the patient's knee joint rehabilitation training. 2. The design of the connecting components allows the base frame and thigh fixation frame to be flexibly adjusted according to the length of the patient's leg. Through the insertion of the first and second insert rods into the corresponding positioning holes, and the reset action of the first and second tension springs, the base frame and thigh fixation frame can be stably tied to the patient's lower leg and thigh respectively, meeting the usage needs of patients with different heights and leg lengths, and improving the versatility and applicability of the brace. 3. The adjusting frame in the limiting component can drive the limiting frame to make arc-shaped movements, thereby flexibly adjusting the position of the limiting frame to limit the opening and closing angle of the patient's thigh and calf. The adjusting frame is clamped and positioned by fastening nuts and anti-slip pads to ensure the stability of the limiting frame position. It can provide a stable limiting effect during each standing training session for the patient. At the same time, the lower and upper straps pass through the lower and upper retractable frames respectively and are attached with Velcro, which can stably bind the base frame and thigh fixation frame to the patient's leg, providing reliable auxiliary support for the patient to perform leg flexion and extension training. 4. The resistance components provide reverse resistance to the patient's thighs during standing training. When the patient rotates the thigh fixation frame vertically, the thigh fixation frame contacts the force plate. Under the elastic force of the elastic component, the moving frame provides resistance to the force plate, thereby enabling the patient to effectively train their leg muscles during standing, which helps to strengthen leg muscle strength and promote the recovery of leg function. 5. The elastic components are designed as detachable independent units. The first and second insert plates are connected by a telescopic tube and a fourth tension spring. In actual use, multiple sets of elastic components of different specifications can be set for patients to choose according to their own training conditions. After selecting the appropriate elastic component, the first and second insert plates are inserted into the corresponding first and second connecting frames, respectively, which can realize the function of providing reverse resistance for the movement of the mobile frame, meeting the needs of patients for different resistance intensities at different training stages. 6. The seat in the support component provides support when the patient is sitting, assisting in repeated standing training. By rotating the bidirectional screw and utilizing the threaded transmission with the two transmission nuts, the two drive frames are moved closer or further apart, which in turn drives the two rotating rods to rotate, achieving flexible adjustment of the seat height. This allows the seat to be adjusted to a suitable height according to the patient's leg strength. At the same time, the handrails on the top of the base allow the patient to hold onto them with both hands, maintaining body stability during standing training and further ensuring the safety and effectiveness of the training.

[0017] This invention allows for adjustment of the height of the support frame and pedal, as well as the position of the seat, during the initial training of hemiplegic patients. This provides adjustable support for the body and also provides reverse resistance to train the thigh muscles, preventing knee hyperextension. During later walking training, by adjusting and fixing the position of the limiting frame, the opening and closing angles of the thigh and calf can be stably limited, meeting the needs of different stages and assisting in patient rehabilitation. Attached Figure Description

[0018] Figure 1 This is a first-view three-dimensional structural diagram of the knee hyperextension brace and training device provided in an embodiment of the present invention. Figure 2 This is a second-view three-dimensional structural diagram of the knee hyperextension brace and training device provided in an embodiment of the present invention. Figure 3 This is a three-dimensional structural diagram of the knee hyperextension prevention brace provided in an embodiment of the present invention from a first-view perspective. Figure 4 This is a two-dimensional structural diagram of the knee hyperextension brace provided in an embodiment of the present invention from a second perspective. Figure 5 This is a three-dimensional schematic diagram of the anti-knee hyperextension brace and the brace and docking connection structure for the training device provided in the embodiments of the present invention; Figure 6 A three-dimensional schematic diagram of the connection structure of the two support pipes, the docking frame, the moving frame and the force plate of the cooperative training device provided in the embodiment of the present invention; Figure 7 A three-dimensional schematic diagram of the connection structure of the limiting ring, the movable frame and the fourth tension spring of the cooperative training device provided in the embodiment of the present invention; Figure 8 This is a three-dimensional cross-sectional schematic diagram of the support tube structure of the cooperative training device provided in an embodiment of the present invention; Figure 9 A three-dimensional schematic diagram of the connection structure of the limiting ring, the movable frame, the second connecting frame, and the second insert plate of the cooperative training device provided in the embodiment of the present invention; Figure 10 A three-dimensional schematic diagram of the connection structure of the first insert plate, telescopic tube, second insert plate, and fourth tension spring of the cooperative training device provided in the embodiment of the present invention; Figure 11 This is a three-dimensional schematic diagram of the mounting frame and base plate connection structure of the cooperative training device provided in an embodiment of the present invention.

[0019] Figure label: 1. Base frame; 2. Lower leg support frame; 3. Lower strap; 4. Lower retractable frame; 5. First connecting cover; 6. First connecting plate; 7. Hinge shaft; 8. Second connecting plate; 9. Limiting groove; 10. Second connecting cover; 11. Thigh support frame; 12. Fastening bolt; 13. Adjusting frame; 14. Limiting frame; 15. First insert rod; 16. First tension spring; 17. Anti-slip pad; 18. Second insert rod; 19. Second tension spring; 20. Upper strap; 21. Upper retractable frame; 22. Fastening nut; 23. Connecting bolt; 24. Connecting nut; 25. Base; 26. Handrail; 27. Slide rail; 28. Pedal; 29. 30. Support tube; 31. Adjusting rod; 32. Connecting frame; 33. Connecting ear plate; 34. Limiting rod; 35. Sliding sleeve; 36. Positioning bolt; 37. Support frame; 38. Moving plate; 39. Mounting rod; 40. Limiting ring; 41. Moving frame; 42. Force plate; 43. Third insert rod; 44. Third tension spring; 45. First connecting frame; 46. Second connecting frame; 47. First insert plate; 48. Second insert plate; 49. Telescopic tube; 50. Fourth tension spring; 51. Mounting frame; 52. Moving rod; 53. Seat plate; 54. Transmission frame; 55. Drive frame; 56. Rotating rod; 57. Double-acting screw; 58. Transmission nut. Detailed Implementation

[0020] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0022] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0023] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0024] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0025] Example 1: Refer to Figure 1-4A brace includes a base frame 1 and a thigh fixation frame 11. Connecting bolts 23 are fixedly installed on both sides of the bottom of the base frame 1, and connecting nuts 24 are threaded onto the connecting bolts 23. A lower leg fixation frame 2 is fixedly installed on the inner side of the base frame 1, used for binding to the patient's lower leg. The thigh fixation frame 11 is used for binding to the patient's thigh. A lower binding strap 3 is fixedly installed on one side of the lower leg fixation frame 2, and a lower retractable frame 4 is fixedly installed on the other side of the lower leg fixation frame 2. The lower binding strap 3 passes through and connects to the lower retractable frame 4. An upper binding strap 20 is fixedly installed on one side of the thigh fixation frame 11, and an upper retractable frame 21 is fixedly installed on the other side of the thigh fixation frame 11. The upper binding strap 20 passes through and connects to the upper retractable frame 21. Velcro fasteners and Velcro tabs are sewn onto both the lower strap 3 and the upper strap 20. The lower strap 3 and upper strap 20 are secured to each other using these fasteners. Two connecting components are symmetrically installed on the top of the base frame 1, each connecting to one side of the bottom of the thigh fixation frame 11, allowing for rotatable connection between the base frame 1 and the thigh fixation frame 11. The brace also includes two limiting components, each mounted on one of the connecting components, to limit the angle of extension between the lower leg and thigh during standing training, preventing knee hyperextension.

[0026] like Figure 4 As shown, the connecting components include a first connecting cover 5 fixedly installed on the top of the base frame 1, and a first connecting plate 6 slidably connected inside the first connecting cover 5. A hinge shaft 7 is fixedly installed through the first connecting plate 6, and a limiting component is installed at one end of the hinge shaft 7. A second connecting plate 8 is rotatably connected to the hinge shaft 7, and a second connecting cover 10 is slidably sleeved on the second connecting plate 8. The second connecting cover 10 is fixedly installed on one side of the bottom of the thigh fixation frame 11. A limiting groove 9 is formed on the second connecting plate 8, and one side of the limiting component extends into the corresponding limiting groove 9 to limit the rotation of the second connecting plate 8. The hinge shafts 7 can be used to hinge the first connecting cover 5 and the second connecting plate 8, so that the base frame 1 and the thigh fixation frame 11 are rotatably connected around the two hinge shafts 7. After the brace is assembled on the patient's leg, the two hinge shafts 7 are located on both sides of the knee and correspond to the knee rotation area. When the patient performs leg flexion and extension exercises, the base frame 1 and the thigh fixation frame 11 can rotate and adjust with the patient's lower leg and thigh respectively, thereby providing auxiliary support for the patient's legs.

[0027] like Figure 4As shown, a first insert rod 15 is slidably connected through one side of the inner wall of the first connecting cover 5. Multiple first positioning holes are evenly spaced on the first connecting cover 5, and the first insert rod 15 is movably inserted into each of the multiple first positioning holes. A first tension spring 16 is sleeved on the first insert rod 15, located outside the first connecting cover 5. The two ends of the first tension spring 16 are fixedly connected to one side of the first connecting cover 5 and one end of the first insert rod 15 via hooks located at both ends. A second insert rod 18 is slidably connected through one side of the inner wall of the second connecting cover 10. Multiple second positioning holes are evenly spaced on the second connecting plate 8, and the second insert rod 18 is inserted into each of the multiple second positioning holes. A second tension spring 19 is sleeved on the second insert rod 18, located outside the second connecting cover 10. The two ends of the second tension spring 19 are fixedly connected to one side of the second connecting cover 10 and one end of the second insert rod 18 via hooks located at both ends. After adjusting the positions of the two hinge axes 7 to correspond to the rotation area of ​​the knee, the base frame 1 and the thigh fixation frame 11 can be moved separately according to the length of the patient's leg to adjust them to suitable positions. After the position adjustment is completed, the first insertion rod 15 and the second insertion rod 18 are released. The first tension spring 16, under tension, can pull the first insertion rod 15 to insert into the corresponding first positioning hole, positioning the first connecting cover 5 and the first connecting plate 6. At the same time, the second tension spring 19, under tension, can pull the second insertion rod 18 to insert into the corresponding second positioning hole, positioning the second connecting plate 8 and the second connecting cover 10, thereby achieving the positioning of the base frame 1 and the thigh fixation frame 11. Then, the lower strap 3 is passed through the lower retractable frame 4 and attached using Velcro and Velcro fasteners on the lower strap 3, which can stably bind the base frame 1 to the patient's lower leg. Meanwhile, the upper strap 20 is passed through the upper retractable frame 21 and attached using Velcro and Velcro straps on the upper strap 20, so that the thigh fixation frame 11 can be stably tied to the patient's thigh to support the thigh and calf when assisting the patient in flexion and extension training.

[0028] This application can be used in the field of rehabilitation training equipment technology, or in other fields applicable to this application.

[0029] Example 2: Reference Figure 1-11An improvement upon Embodiment 1: A knee hyperextension brace, applied in the field of rehabilitation training equipment technology, includes a limiting component comprising a fastening bolt 12 fixedly mounted on one end of a hinge shaft 7, with an adjusting bracket 13 fitted onto the fastening bolt 12. An anti-slip pad 17 is fixedly mounted on one side of a first connecting plate 6, used to limit the position of the adjusting bracket 13. A limiting bracket 14 is fixedly mounted on the adjusting bracket 13, with one side extending into a corresponding limiting groove 9, used to limit the position of a corresponding second connecting plate 8. The first connecting plate 6 has graduated lines, providing a reference when the limiting bracket 14 is rotated for adjustment. A fastening nut 22 is threaded onto the fastening bolt 12, used to press the adjusting bracket 13. Rotating the adjusting bracket 13 causes the limiting bracket 14 to move in an arc, thereby adjusting the position of the limiting bracket 14 within the limiting groove 9. When the second connecting plate 8 rotates with the thigh fixation frame 11, causing the inner wall of the limiting groove 9 near the second connecting cover 10 to contact the limiting frame 14, further rotation of the second connecting plate 8 will be hindered. This allows the thigh fixation frame 11 to limit the opening and closing angle between the thigh and calf after the patient's leg extends to a certain angle, preventing knee hyperextension during standing training. After adjusting the position of the limiting frame 14, the fastening nut 22 is rotated to move it closer to the adjusting frame 13. The fastening nut 22 and the anti-slip pad 17 are used to clamp and position the adjusting frame 13, thereby achieving stable limiting of the limiting frame 14 and ensuring stable limitation of the opening and closing angle during each standing training session.

[0030] This device is equipped with two sets of braces to prevent knee hyperextension, which can provide auxiliary support for the patient's left leg, right leg, or both legs during training.

[0031] like Figure 1 , Figure 2 , Figures 5-11 As shown, a training device, used in the aforementioned knee hyperextension brace, includes two pedals 28 for supporting the patient's left or right foot, respectively. Two support tubes 29 are symmetrically fixed to the top of each pedal 28. Adjustable rods 30 are slidably connected within each support tube 29. The tips of the two adjustable rods 30 extend above the two support tubes 29 and are fixedly mounted on the same connecting frame 31. A base frame 1 is snapped onto the top of the corresponding connecting frame 31. Two connecting ear plates 32 are symmetrically fixed to the connecting frame 31. Connecting bolts 23 pass through the corresponding connecting ear plates 32 and are fixedly connected to the connecting ear plates 32 via connecting nuts 24. Resistance components are provided on one side of each of the two support tubes 29. These resistance components provide resistance to the patient's thigh during standing training, providing a load for the training.

[0032] like Figure 7-10As shown, the resistance component includes a support frame 36, which is fixedly installed on one side of each of the two support tubes 29. A movable plate 37 is slidably connected through the support frame 36, and an mounting rod 38 is fixedly installed on one side of the movable plate 37. One side of the mounting rod 38 is fixedly connected to one side of the docking frame 31. A limiting ring 39 is fixedly installed on the top of the movable plate 37, and a movable frame 40 is slidably connected inside the limiting ring 39. A force-bearing plate 41 is fixedly installed on the side of the movable frame 40 near the thigh fixation frame 11. An elastic component is provided inside the movable frame 40, and one side of the elastic component is fixedly connected to one side of the limiting ring 39. When the base frame 1 is clamped onto the docking frame 31 and the patient's foot is on the pedal 28, the patient will rotate the thigh fixation frame 11 in the vertical direction when performing standing training. During the rotation, the thigh fixation frame 11 will contact the force-bearing plate 41, pushing the force-bearing plate 41 and the movable frame 40 to move. At this time, under the elastic force of the elastic component, the moving frame 40 can provide reverse resistance to the force plate 41, thereby providing resistance to the patient's thigh and training the leg muscles during the patient's standing process.

[0033] like Figure 9-10 As shown, the elastic component includes a first connecting frame 44 and a second connecting frame 45. The first connecting frame 44 is fixedly installed on one side of the limiting ring 39, and the second connecting frame 45 is fixedly installed on the inner wall of one side of the movable frame 40. It also includes a first insert plate 46 and a second insert plate 47. The first insert plate 46 is inserted into the first connecting frame 44, and the second insert plate 47 is inserted into the second connecting frame 45. A telescopic tube 48 is fixedly installed between the first insert plate 46 and the second insert plate 47, and a fourth tension spring 49 is sleeved on the telescopic tube 48. The two ends of the fourth tension spring 49 are fixedly installed on the sides of the first insert plate 46 and the second insert plate 47 that are close to each other by hooks provided at both ends. The first insert plate 46 and the second insert plate 47 are connected by the telescopic tube 48 and the fourth tension spring 49 to form a detachable independent unit. In actual use, multiple sets of this unit with different elastic forces can be provided for patients to choose from. After selection, the first insert plate 46 and the second insert plate 47 are inserted into the corresponding first connecting frame 44 and second connecting frame 45, respectively. When the movable frame 40 moves, the fourth tension spring 49 is stretched through the second insert plate 47, and the elastic force of the fourth tension spring 49 provides reverse resistance to the movement of the movable frame 40. Therefore, after the force plate 41 contacts the thigh fixation frame 11, it can prevent the thigh fixation frame 11 from rotating in the vertical direction, providing appropriate resistance for the patient's standing training.

[0034] like Figure 8As shown, a third insert rod 42 is slidably connected through the inner wall of the top of one side of the support tube 29. Multiple positioning slots are evenly spaced on one side of the adjusting rod 30, and the third insert rod 42 is movably engaged with each of these positioning slots. A third tension spring 43 is sleeved on the third insert rod 42, located outside the support tube 29. Both ends of the third tension spring 43 are fixedly connected to one end of the third insert rod 42 and the top of one side of the support tube 29 via hooks located at both ends. Before engaging the docking frame 31 with the base frame 1, the height of the two docking frames 31 can be pre-adjusted according to the length of the patient's lower leg. After the height adjustment is completed, the two third insert rods 42 are released. The tension spring 43, under tension, can move the corresponding third insert rod 42, causing it to insert into the corresponding positioning slot on the adjusting rod 30, thereby positioning and braking the adjusting rod 30 and achieving stable limiting of the height of the docking frame 31.

[0035] like Figure 1 , Figure 2 , Figures 5-11 As shown, the training device also includes a base 25, with two pedals 28 symmetrically arranged on the top of the base 25. Two symmetrical grooves are formed on the top of the base 25, and slide rails 27 are fixedly installed on the inner walls of both sides of the grooves. Sliding blocks are slidably connected to the slide rails 27, and the tops of the two sliding blocks are fixedly connected to the bottom of the pedals 28. A handrail 26 is fixedly installed on the top of the base 25. Two limiting rods 33 are symmetrically fixedly installed on the top of the base 25, with sliding sleeves 34 slidably fitted onto the limiting rods 33. One side of the sliding sleeves 34 is fixedly connected to one side of the pedals 28. A positioning bolt 35 is threaded through the inner wall of the top of the sliding sleeve 34, and the positioning bolt 35 can clamp the limiting rod 33. A support component is provided on one side of the base 25 to provide sitting support for the patient. By sliding the two pedals 28 onto the base 25, the forward and backward position of the pedals 28 can be adjusted according to the position adapted to the patient's legs. After adjustment, tighten the positioning bolt 35 to clamp the limiting rod 33, thus positioning the pedal 28 and providing stable support for the patient during training. The handrail 26 provides support for the patient's hands, helping them maintain stability during standing training.

[0036] like Figure 11As shown, the support components include a mounting frame 50 fixedly mounted on one side of the base 25. Two movable rods 51 are symmetrically slidably connected to the mounting frame 50, and a single seat plate 52 is fixedly mounted at the top of each of the two movable rods 51 for the patient to sit on. A single transmission frame 53 is fixedly mounted at the bottom of each of the two movable rods 51, passing through the mounting frame 50 and slidably connected to it. Two drive frames 54 are symmetrically slidably connected to the top of the transmission frame 53, and a rotating rod 55 is rotatably connected to each drive frame 54. The top of the rotating rod 55 is rotatably connected to the mounting frame 50 via a pin. A double-acting screw 56 is rotatably connected to the top of the transmission frame 53, and a transmission nut 57 is fixedly mounted on each side of the two drive frames 54 that are close to each other. The double-acting screw 56 has two symmetrically arranged threaded grooves with opposite thread directions. The double-acting screw 56 passes through the two drive frames 54 and the two transmission nuts 57 respectively, and is threadedly connected to the two transmission nuts 57 via the two threaded grooves. The seat plate 52 provides support for the patient's body when sitting, assisting the patient in sitting up and standing during repetitive standing exercises. By rotating the bidirectional screw 56, the two drive frames 54 are moved closer or further apart through the threaded transmission with the two transmission nuts 57, thereby causing the two rotating rods 55 to rotate horizontally or vertically. When the rotating rods 55 rotate horizontally, they pull the transmission frame 53 upward, which in turn moves the seat plate 52 upward via the two moving rods 51. This allows the seat plate 52 to be adjusted to a suitable height according to the patient's leg strength. When the rotating rods 55 rotate downward, the seat plate 52 can be lowered. Therefore, during the patient's standing training, this support component can conveniently assist in adjusting the patient's sitting posture height.

[0037] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A brace for preventing knee hyperextension, characterized in that, include: The base frame (1) and the thigh fixing frame (11) are fixed with connecting bolts (23) on both sides of the bottom of the base frame (1), and connecting nuts (24) are threaded on the connecting bolts (23). The base frame (1) is fixed to the inner side of the lower leg fixation frame (2), which is used to tie the patient's lower leg and the thigh fixation frame (11) is used to tie the patient's thigh. The lower leg fixing bracket (2) is fixedly connected to a lower strap (3) and a lower retractable bracket (4) on one side. The lower strap (3) passes through the lower retractable bracket (4) and is detachably connected to the lower retractable bracket (4) via a Velcro tab. The thigh fixation frame (11) is fixedly connected to an upper strap (20) and an upper retractable frame (21) on one side. The upper strap (20) passes through the upper retractable frame (21) and is detachably connected to the upper retractable frame (21) via a Velcro tab. The base frame (1) has two symmetrically fixed connecting parts at the top. Both connecting parts are connected to one side of the bottom of the thigh fixation frame (11) to realize the rotational connection between the base frame (1) and the thigh fixation frame (11). Two limiting components are respectively installed on the two connecting components to limit the extension angle between the lower leg and the thigh during the patient's standing training, so as to prevent the patient from having knee hyperextension problems.

2. The knee hyperextension brace according to claim 1, characterized in that, The connecting component includes a first connecting cover (5) fixed to the top of the base frame (1), a first connecting plate (6) slidably connected inside the first connecting cover (5), a hinge shaft (7) passing through and fixed on the first connecting plate (6), and the limiting component is installed at one end of the hinge shaft (7). A second connecting plate (8) is rotatably connected to the hinge shaft (7), and a second connecting cover (10) is slidably fitted on the second connecting plate (8). The second connecting cover (10) is fixed to one side of the bottom of the thigh fixation frame (11). A limiting groove (9) is provided on the second connecting plate (8), and one side of the limiting component extends into the corresponding limiting groove (9) to limit the rotation angle of the second connecting plate (8); The first connecting cover (5) and the second connecting plate (8) are hinged through the hinge shaft (7), so that the base frame (1) and the thigh fixation frame (11) can rotate around the two hinge shafts (7) to adapt to the leg rotation movement of the patient during leg flexion and extension training, and play an auxiliary support role for the patient's leg.

3. The knee hyperextension brace according to claim 2, characterized in that, A first insert rod (15) is slidably connected through one side of the inner wall of the first connecting cover (5). Multiple first positioning holes are equally spaced on the first connecting cover (5). The first insert rod (15) is detachably inserted into the multiple first positioning holes. The first insertion rod (15) is fitted with a first tension spring (16) located outside the first connecting cover (5). The two ends of the first tension spring (16) are respectively fixed to one side of the first connecting cover (5) and one end of the first insertion rod (15) by hooks. A second insert rod (18) is slidably connected through one side of the inner wall of the second connecting cover (10). A plurality of second positioning holes are equally spaced on the second connecting plate (8). The second insert rod (18) is detachably inserted into the plurality of second positioning holes. The second insertion rod (18) is fitted with a second tension spring (19) located outside the second connecting cover (10). The two ends of the second tension spring (19) are respectively fixed to one side of the second connecting cover (10) and one end of the second insertion rod (18) through hooks. The first insertion rod (15) is pulled into the corresponding first positioning hole by the reset action of the first tension spring (16), thereby positioning the first connecting cover (5) and the first connecting plate (6). The second insertion rod (18) is pulled into the corresponding second positioning hole by the reset action of the second tension spring (19), thereby positioning the second connecting plate (8) and the second connecting cover (10), thereby stabilizing and fixing the position of the base frame (1) and the thigh fixation frame (11) to meet the usage needs of patients with different leg lengths.

4. The knee hyperextension brace according to claim 2, characterized in that, The limiting component includes a fastening bolt (12) fixed to one end of the hinge shaft (7), an adjusting bracket (13) is sleeved on the fastening bolt (12), and an anti-slip pad (17) is fixed to one side of the first connecting plate (6). The anti-slip pad (17) is used to limit the adjusting bracket (13). A limiting frame (14) is fixedly connected to the adjusting frame (13). One side of the limiting frame (14) extends into the corresponding limiting groove (9) to limit the second connecting plate (8). A fastening nut (22) is threaded onto the fastening bolt (12), and the fastening nut (22) is used to press and fix the adjusting bracket (13). In this process, by rotating the adjusting frame (13) to drive the limiting frame (14) to move in an arc, the position of the limiting frame (14) in the limiting groove (9) is adjusted. When the second connecting plate (8) rotates with the thigh fixing frame (11) to contact the inner wall of the limiting groove (9) and the limiting frame (14), it blocks the second connecting plate (8) from continuing to rotate, thereby limiting the opening and closing angle of the thigh and calf and preventing knee hyperextension. The adjusting frame (13) is clamped and fixed by the cooperation of the fastening nut (22) and the anti-slip pad (17) to ensure the stability of the position of the limiting frame (14).

5. A training device for use with any of the knee hyperextension prevention braces according to claims 1 to 4, characterized in that, It includes two pedals (28) for supporting the patient's left and right feet respectively; Two support tubes (29) are symmetrically fixed to the top of the pedal (28). An adjusting rod (30) is slidably connected inside the support tube (29). The top ends of the two adjusting rods (30) extend to the top of the corresponding support tube (29) and are fixed to the same docking frame (31). The base frame (1) is clamped on the top of the corresponding docking frame (31). Two connecting ear plates (32) are symmetrically fixed on the docking frame (31). The connecting bolt (23) passes through the corresponding connecting ear plate (32) and is fixed to the connecting ear plate (32) by the connecting nut (24). One side of each of the two support tubes (29) is provided with a resistance component, which is used to provide reverse resistance to the patient's thigh during standing training, to provide load for leg muscle training, and to help the patient recover leg strength.

6. The cooperative training device according to claim 5, characterized in that, The resistance component includes a support frame (36) fixed to one side of two support tubes (29), a movable plate (37) is slidably connected through the support frame (36), an installation rod (38) is fixed to one side of the movable plate (37), and one side of the installation rod (38) is fixed to one side of the docking frame (31). The top of the movable plate (37) is fixedly connected to a limiting ring (39), and a movable frame (40) is slidably connected inside the limiting ring (39). A force plate (41) is fixedly connected to the side of the movable frame (40) near the thigh fixing frame (11). An elastic component is provided inside the movable frame (40), and one side of the elastic component is fixedly connected to one side of the limiting ring (39); During the standing training, the patient rotates the thigh fixation frame (11) in the vertical direction, and the thigh fixation frame (11) contacts the force plate (41) and pushes it to move. The elastic force of the elastic component provides reverse resistance to the force plate (41) through the moving frame (40), thereby applying resistance to the patient's thigh and realizing the training of leg muscles.

7. The cooperative training device according to claim 6, characterized in that, The elastic component includes a first connecting frame (44) fixed to one side of the limiting ring (39) and a second connecting frame (45) fixed to the inner wall of one side of the movable frame (40), and also includes a first insert plate (46) and a second insert plate (47). The first insert plate (46) is detachably inserted into the first connecting frame (44), and the second insert plate (47) is detachably inserted into the second connecting frame (45). The first insert plate (46) and the second insert plate (47) are fixedly connected to the same telescopic tube (48). A fourth tension spring (49) is sleeved on the telescopic tube (48). The two ends of the fourth tension spring (49) are fixedly connected to the side of the first insert plate (46) and the second insert plate (47) that are close to each other by pull hooks. Among them, the first insert plate (46), the second insert plate (47), the telescopic tube (48) and the fourth tension spring (49) constitute an independent unit that can be disassembled and assembled. Multiple sets of this unit with different elasticity specifications are provided for patients to choose from. When the mobile frame (40) moves, the fourth tension spring (49) is stretched through the second insert plate (47). The elasticity of the fourth tension spring (49) provides reverse resistance to adapt to the resistance requirements of patients at different training stages.

8. The cooperative training device according to claim 5, characterized in that, A third insert rod (42) is slidably connected through the top inner wall of one side of the support tube (29). Multiple positioning slots are equally spaced on one side of the adjusting rod (30). The third insert rod (42) and the multiple positioning slots can be detachably snapped together. The third insertion rod (42) is fitted with a third tension spring (43) located outside the support tube (29). The two ends of the third tension spring (43) are respectively fixed to one end of the third insertion rod (42) and the top of one side of the support tube (29) by hooks. When adjusting the height of the docking frame (31) according to the length of the patient's lower leg, the adjusting rod (30) is pulled to slide in the support tube (29). After the adjustment is completed, the third tension spring (43) resets and drives the third insertion rod (42) to insert into the corresponding positioning groove, thereby realizing the positioning and braking of the adjusting rod (30) and stabilizing the height of the docking frame (31).

9. The cooperative training device according to claim 5, characterized in that, It also includes a base (25), with the two pedals (28) symmetrically arranged on the top of the base (25); The base (25) has two symmetrical sliding grooves on its top. Slide rails (27) are fixedly connected to the inner walls on both sides of the sliding grooves. Slider blocks are slidably connected to the slide rails (27). The tops of the two slider blocks are fixedly connected to the bottom of the pedal (28). The base (25) is fixedly connected to the top of the handrail (26), and two limiting rods (33) are symmetrically fixedly connected to the top of the base (25). A sliding sleeve (34) is slidably fitted on the limiting rod (33), and one side of the sliding sleeve (34) is fixedly connected to one side of the pedal (28). A positioning bolt (35) is threaded through the inner wall of the top of the sliding sleeve (34), and the positioning bolt (35) is clamped and fixed with the limiting rod (33); A support component is provided on one side of the base (25) for supporting the patient's body while sitting. Among them, the pedal (28) slides along the slide groove through the cooperation of the slider and the slide rail (27). After being adjusted to a position suitable for the patient's legs, it is fixed by clamping the limiting rod (33) with the positioning bolt (35). The handrail (26) is provided for the patient to hold with both hands, ensuring the stability of the patient's body during standing training and improving the safety of training.

10. The cooperative training device according to claim 9, characterized in that, The support component includes a mounting bracket (50) fixed to one side of the base (25), and two movable rods (51) are symmetrically slidably connected on the mounting bracket (50). The top ends of the two movable rods (51) are fixed to the same seat plate (52) for patients to sit on. The bottom ends of the two moving rods (51) are fixed to the same transmission frame (53), which passes through the mounting frame (50) and is slidably connected to the mounting frame (50). The transmission frame (53) has two drive frames (54) symmetrically slidably connected to its top. A rotating rod (55) is rotatably connected to the drive frame (54). The top end of the rotating rod (55) is rotatably connected to the mounting frame (50) through a pin. The top of the transmission frame (53) is rotatably connected to a bidirectional screw (56), and the two drive frames (54) are fixed with transmission nuts (57) on the side that is close to each other. The bidirectional screw (56) is symmetrically provided with two threaded grooves with opposite thread directions. The bidirectional screw (56) passes through the two drive frames (54) and the two transmission nuts (57), and is threadedly connected to the two transmission nuts (57) through the two threaded grooves respectively. When the bidirectional screw (56) is rotated, the two drive frames (54) are driven to move closer or further apart through the threaded transmission with the two transmission nuts (57), which in turn drives the rotating rod (55) to rotate, pulls the transmission frame (53) and the moving rod (51) to move up and down, adjusts the height of the seat plate (52), adapts to the patient's leg strength, and assists the patient in completing repetitive standing training.

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