Pressure-adjustable fracture rehabilitation nursing fixing device

Abstract

The invention relates to the technical field of orthopedic rehabilitation nursing instruments, and discloses a pressure-adjustable fracture rehabilitation nursing fixing device which comprises a thigh fixing frame, shank fixing frames are movably mounted on the two sides of the tail end of the thigh fixing frame through movable discs, and movable blocks are movably mounted in through holes; transverse frames are fixedly mounted in the movable blocks, rotating frames are movably mounted on the two sides of each transverse frame, spring plates are fixedly mounted on the two sides of the interior of each transverse frame, and the tail ends of the spring plates extend into the rotating frames on the corresponding sides; and pressing rollers are fixedly mounted at one ends of the inner side walls of the rotating frames, and the tail ends of the pressing rollers abut against the inner surfaces of the spring plates on the corresponding sides. The device is attached to limbs, the supporting force is constant and can be flexibly adjusted, the device can automatically adapt to flexion and extension actions, secondary injury is prevented through electromagnetic damping, the device has the characteristics of breathability, comfort and convenient and fast fixation, and safe, adaptive and comfortable fixing nursing guarantee is provided for fracture rehabilitation.

Description

Technical Field

[0001] This invention relates to the field of orthopedic rehabilitation and nursing equipment technology, specifically to an adjustable pressure fracture rehabilitation and fixation device. Background Technology

[0002] Fractures are a common type of bone injury in clinical practice, and proper fixation during the rehabilitation phase is crucial for ensuring bone healing and preventing secondary injury. Whether it's a lower limb shaft fracture, a periarticular fracture, or a comminuted fracture, fixation devices are necessary to provide stable support to the fracture ends, restricting abnormal movement while creating a favorable environment for bone repair. With advancements in medical concepts, fracture rehabilitation is no longer limited to simple "rigid fixation" but pursues a model that combines "fixation with rehabilitation training." This requires fixation devices to ensure stability at the fracture ends, adapt to the patient's flexion and extension training needs, and simultaneously consider wearing comfort and adjustable pressure to accommodate the individualized needs of different healing stages and limb morphologies. Currently, commonly used fracture fixation devices in clinical practice mainly include traditional plaster casts, ordinary braces, and pneumatic fixation devices. While traditional plaster casts offer strong stability, they suffer from poor breathability, heavy weight, and lack of pressure adjustment. Furthermore, they restrict limb movement after fixation, hindering early rehabilitation training, and may cause skin damage and muscle atrophy after removal. Ordinary braces achieve fixation through straps or splints, offering some breathability and adjustability, but their support force is often rigidly set and cannot be dynamically adjusted according to the patient's limb movements. This can easily lead to either excessively tight clamping causing poor blood circulation or excessively loose clamping resulting in fixation failure. Pneumatic fixation devices provide support through inflated airbags, relieving local pressure, but the airbag pressure adjustment precision is insufficient, and they lack cushioning and protective designs for flexion and extension training. During rehabilitation exercises, patients are prone to abnormal stress on the fracture ends due to sudden force release. The core challenges of existing technologies lie in three main areas: First, it is difficult to balance the stability and adjustability of the supporting pressure; most devices cannot achieve precise adjustment under constant supporting force, and their ability to adapt to different stages of rehabilitation is insufficient. Second, there is a lack of dynamic pressure regulation mechanisms that adapt to limb flexion and extension movements, making the fracture ends susceptible to abnormal stress during rehabilitation training. Third, the fit and safety of the fixation structure need improvement; some devices suffer from localized pressure, poor ventilation, or a lack of protection against secondary injuries. These deficiencies lead to a poor patient rehabilitation experience and may even affect fracture healing outcomes. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an adjustable pressure fracture rehabilitation and fixation device, which solves the problems of traditional fracture fixation devices, such as inaccurate pressure adjustment, unstable support force, inability to dynamically adapt to flexion and extension training, and lack of secondary injury protection.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an adjustable pressure fracture rehabilitation and fixation device, comprising a thigh fixation frame, with a lower leg fixation frame movably mounted on both ends of the thigh fixation frame via movable discs. Several through holes are provided on both sides of the lower leg fixation frame, with movable blocks movably mounted inside each through hole. A crossbar is fixedly mounted inside each movable block, and a rotating frame is movably mounted on both sides of the crossbar. Spring plates are fixedly mounted on both sides of the crossbar, with the ends of the spring plates extending into the interior of the corresponding rotating frame. A pressure roller is fixedly mounted on one end of the inner wall of each rotating frame, with the ends of the pressure rollers abutting against the inner surface of the corresponding spring plate. A connecting rod is movably mounted on the end of each rotating frame near the lower leg fixation frame, with a pressure rod movably mounted at the end of each connecting rod. The ends of the pressure rods extend to the outside of the movable blocks and are respectively fixedly mounted on both sides of the fixation plate.

[0005] Both sides of the cross frame are movably mounted with support platforms, and the inner ends of the support platforms abut against the outer surface of the corresponding spring plates.

[0006] The movable block has threaded rods movably installed on both sides of the inner wall of the side closest to the crossbeam. The outer diameter of each threaded rod is threaded with a slider, and the inner end of the slider is fixedly connected to the outer end of the corresponding support platform.

[0007] The inner end of each threaded rod is fixedly equipped with a driven bevel gear, and the middle of the outer end of each movable block is movably equipped with an adjustment knob. The middle of each adjustment knob extends through a movable shaft into the interior of the corresponding movable block and is fixedly equipped with a driving bevel gear. The two ends of the driving bevel gear are respectively engaged and connected to the inner ends of the two adjustment knobs.

[0008] The upper and lower ends of the movable block are provided with straight slots. The upper and lower ends of the movable block are connected to a button by a reset spring on the side of the straight slot. The inner end of the button extends into the interior of the movable block and is fixedly installed with a limit plate. The outer end of the limit plate is fixedly connected with several limit teeth. The two sides of the movable plate are fixedly connected with hook plates near each limit plate.

[0009] Both sides of the inner bottom of the lower leg fixation frame are fixedly installed with supporting airbags. A nitrogen storage chamber is movably installed at the bottom end of the lower leg fixation frame. An inner rod is movably installed at the bottom end of the thigh fixation frame. The end of the inner rod extends into the interior of the nitrogen storage chamber and is fixedly installed with a rubber piston.

[0010] The inner end of the support airbag is connected by a connecting pipe, and a vent pipe is fixedly installed in the middle of the connecting pipe, with the end of the vent pipe extending to the inner side of the nitrogen storage chamber.

[0011] A copper cylinder is fixedly installed at the bottom of the nitrogen storage chamber, and a bent rod is fixedly installed at the bottom of the inner rod. The end of the bent rod extends into the interior of the copper cylinder and is fixedly installed with a rubidium magnet.

[0012] Several elastic straps are fixedly installed on one side of the top of both the thigh fixation frame and the calf fixation frame, and strap perforation rings are fixedly installed on the other side of the top of both the thigh fixation frame and the calf fixation frame. Velcro is provided at the end and middle of each elastic strap.

[0013] The outer surfaces of both the thigh fixation bracket and the calf fixation bracket are provided with several ventilation holes.

[0014] This invention provides an adjustable pressure fixation device for fracture rehabilitation and nursing. It has the following beneficial effects: 1. This invention provides multi-point support for the fractured lower leg by using multiple sets of movable blocks on the lower leg fixation frame in conjunction with a fixation splint. The fixation structure can closely conform to the contour of the patient's limb, avoiding uneven local stress. Compared with the traditional single fixation method, the support coverage is more comprehensive, significantly improving the overall support strength, effectively fixing the fracture ends, and creating stable conditions for rehabilitation.

[0015] 2. The fixing splint of this invention uses pressure rods and connecting rods to drive the rotating frame to bend. When the pressure rollers on the rotating frame bend the spring plate, they slide relative to each other, allowing the lever arm of the spring plate to dynamically adjust with the degree of bending. This compensates for the change in spring force with deformation, ensuring that the supporting force of the fixing splint on the lower leg remains constant. This design avoids sudden changes in clamping force due to limb movement during the patient's rehabilitation, preventing abnormal force on the fracture ends and reducing rehabilitation risks.

[0016] 3. This invention allows for adjustment of the clamping force by rotating an adjustment knob. The knob drives the active bevel gear, driven bevel gear, and threaded rod to rotate, which in turn drives the slider and support platform to move synchronously, changing the fulcrum position of the bending spring plate and ultimately adjusting the elastic force generated by the spring plate. Patients can adjust the clamping pressure of each fixation splint according to their fracture healing progress and pain tolerance to meet the needs of different rehabilitation stages and improve wearing comfort and fit.

[0017] 4. When patients perform flexion and extension exercises, bending the lower leg will cause the inner rod and rubber piston to move in the nitrogen storage chamber, causing a change in air pressure on one side of the nitrogen storage chamber. The nitrogen in the support airbag can flow bidirectionally through the connecting tube and the ventilation tube, automatically adjusting the support pressure of the support airbag on the lower leg. The pressure decreases when bending and increases when extending, avoiding abnormal force on the fracture ends during flexion and extension, and providing adaptive support for rehabilitation training.

[0018] 5. When the inner rod of this invention moves, it drives the neodymium magnet at the end of the bending rod to move within the copper cylinder. According to electromagnetic induction and Lenz's law, eddy currents are generated within the copper cylinder, which excite a reverse magnetic field, creating an electromagnetic repulsion force on the neodymium magnet, thus acting as a deceleration and buffer. This design effectively prevents sudden, large-amplitude bending of the lower leg, avoiding secondary injuries when the patient suddenly releases force, and providing safety protection for flexion and extension movements during rehabilitation training. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the internal structure of the active block in this invention; Figure 4 This is a side view of the internal structure of the movable block in this invention; Figure 5 for Figure 4 Enlarged view at point B in the middle; Figure 6 This is a bottom view of the present invention; Figure 7 This is a schematic diagram of the internal structure of the nitrogen storage chamber in this invention.

[0020] The components include: 1. Thigh fixation frame; 2. Movable plate; 3. Lower leg fixation frame; 4. Through hole; 5. Movable block; 6. Horizontal frame; 7. Rotating frame; 8. Spring plate; 9. Pressure roller; 10. Connecting rod; 11. Pressure rod; 12. Fixed clamping plate; 13. Support platform; 14. Threaded rod; 15. Driven bevel gear; 16. Adjustment knob; 17. Driving bevel gear; 18. Slider; 19. Straight groove; 20. Pressure button; 21. Limiting plate; 22. Limiting tooth; 23. Hook plate; 24. Support airbag; 25. Nitrogen storage chamber; 26. Inner rod; 27. Rubber piston; 28. Vent pipe; 29. ​​Copper cylinder; 30. Bending rod; 31. Neodymium magnet; 32. Elastic strap; 33. Strap perforation ring; 34. Velcro; 35. Vent hole. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example:

[0022] Please see the appendix Figure 1 -Appendix Figure 7This invention provides an adjustable pressure fracture rehabilitation and fixation device, such as... Figure 1As shown, the device includes a thigh fixation frame 1, which serves as the core load-bearing structure, providing a stable placement and support base for the patient's thigh. Its overall structure conforms to the physiological contour of the thigh, effectively distributing force and preventing localized compression. Lower leg fixation frames 3 are movably mounted on both ends of the thigh fixation frame 1 via movable discs 2. The movable discs 2 employ a rotatable connection design, allowing the lower leg fixation frames 3 to flex, extend, and rotate flexibly relative to the thigh fixation frame 1, meeting the needs of limb movement during rehabilitation training while ensuring the stability of the connection points and preventing loosening or displacement during activity. Several through holes 4 are provided on both sides of the lower leg fixation frames 3, providing channels for the installation and movement of movable blocks 5. The location and number of these through holes... The design is optimized to accommodate the support needs of different parts of the calf, ensuring that multiple sets of fixed clamps 12 are evenly distributed on both sides of the calf for comprehensive support. Movable blocks 5 are movably installed inside each through hole 4, allowing them to move back and forth along the axial direction of the through hole 4. This moves the fixed clamps 12 closer to or further away from the calf, providing a basis for adjusting the position of the fixed clamps 12. A crossbeam 6 is fixedly installed inside each movable block 5. The crossbeam 6 serves as the core support component inside the movable block 5, providing a mounting platform for components such as the rotating frame 7 and spring plate 8, ensuring that all components are assembled in an orderly manner and operate stably inside the movable block 5. Rotating frames 7 are movably installed on both sides of the crossbeam 6, allowing them to rotate and bend around their connection point with the crossbeam 6, driving the connecting rod through their own rotation. The movement of rod 10 and pressure rod 11 enables the pressure transmission of the fixed clamping plate 12. Spring plates 8 are fixedly installed on both sides of the inner side of the cross frame 6, with the ends of the spring plates 8 extending into the interior of the corresponding rotating frame 7. The spring plates 8 possess good elastic deformation capability; under the pressure of the rotating frame 7, they can bend and generate a reverse elastic force. This elastic force is transmitted to the fixed clamping plate 12 through the rotating frame 7, connecting rod 10, and pressure rod 11, providing continuous support pressure for the fixed clamping plate 12. Pressure rollers 9 are fixedly installed on one end of the inner wall of the rotating frame 7, with the ends of the pressure rollers 9 abutting against the inner surface of the corresponding spring plate 8. The pressure rollers 9 and the inner surface of the spring plate 8 are in close contact. When the rotating frame 7 bends, the pressure rollers 9 will slide relative to the surface of the spring plate 8, changing the bending of the spring plate 8 through this sliding motion. The lever arm compensates for the elastic fluctuations caused by changes in the bending degree of the spring plate 8, ensuring that the supporting force of the fixation splint 12 remains constant. A connecting rod 10 is movably installed at one end of the rotating frame 7 near the lower leg fixation frame 3. The connecting rod 10 acts as a force transmission intermediary, converting the rotational motion of the rotating frame 7 into the linear motion of the pressure rod 11, achieving effective force transmission. A pressure rod 11 is movably installed at the end of each connecting rod 10, directly connecting to the fixation splint 12. This pressure rod 11 transmits the force from the connecting rod 10 to the fixation splint 12, pushing the fixation splint 12 to fit tightly against the lower leg, achieving fixed support for the fracture site. The ends of the pressure rods 11 extend to the outside of the movable block 5 and are fixedly installed on both sides of the fixation splint 12. The fixation splint 12 adopts an arc-shaped design that conforms to the contour of the limb.It can fit closely to the surface of the lower leg, and through the synergistic action of multiple sets of fixation splints 12, it achieves multi-point uniform support for the fracture site of the lower leg, improving fixation stability and comfort. In this embodiment, support platforms 13 are movably installed on both sides of the inner side of the cross frame 6, and the inner ends of the support platforms 13 abut against the outer surface of the corresponding side spring plate 8. The support platforms 13 provide support fulcrums for the spring plate 8. The movement of their positions will change the force fulcrum when the spring plate 8 bends, thereby adjusting the magnitude of the elastic force generated by the bending of the spring plate 8, which plays a key role in adjusting the clamping force. The tight contact between the support platforms 13 and the outer surface of the spring plate 8 ensures the stability of the fulcrum and avoids the fulcrum shift when the spring plate 8 bends. Furthermore, threaded rods 14 are movably installed on both sides of the inner wall of the movable block 5 near the crossbeam 6. The threaded rods 14 drive the sliders 18 to move linearly through rotation. The threaded structure design ensures the smoothness and accuracy of the sliders 18's movement, providing power transmission for the position adjustment of the support platform 13. The outer diameter of the threaded rods 14 is threaded with sliders 18, and the inner end of the sliders 18 is fixedly connected to the outer end of the corresponding support platform 13. The sliders 18 convert the rotational motion of the threaded rods 14 into their own linear motion, thereby driving the support platform 13 to move synchronously, achieving precise adjustment of the position of the support platform 13. The fixed connection between the sliders 18 and the support platform 13 ensures the effective transmission of force and prevents them from falling off or loosening during movement. Furthermore, driven bevel gears 15 are fixedly installed on the inner ends of the threaded rod 14. The driven bevel gears 15 mesh with the driving bevel gears 17, transmitting the rotational motion of the driving bevel gears 17 to the threaded rod 14, thus realizing the conversion of the power direction and ensuring that the rotation of the adjusting knob 16 can effectively drive the threaded rod 14 to rotate. Adjusting knobs 16 are movably installed in the middle of the outer ends of the movable block 5. The adjusting knobs 16 provide an operating interface for the user. The user can start the clamping force adjustment function by rotating the adjusting knobs 16. The operation is convenient and intuitive. The middle of the adjusting knobs 16 extends through the movable shaft. An active bevel gear 17 is fixedly installed inside the corresponding movable block 5. The active bevel gear 17 rotates under the drive of the adjustment knob 16. Through the meshing transmission with the driven bevel gear 15, the power is transmitted to the threaded rods 14 on both sides, realizing the synchronous rotation of the threaded rods 14 on both sides. The two ends of the active bevel gear 17 are respectively meshed and connected to the inner ends of the two adjustment knobs 16. This meshing structure ensures that when the active bevel gear 17 rotates, it can simultaneously drive the two driven bevel gears 15 and the threaded rods 14 to rotate, realizing the synchronous movement of the support platforms 13 on both sides and ensuring that the force on both sides of the spring plate 8 is balanced. Furthermore, straight slots 19 are provided at both the upper and lower ends of the movable block 5. The straight slots 19 provide space for the movement of the button 20, ensuring that the button 20 can move smoothly in and out without jamming. The upper and lower ends of the movable block 5 near the straight slots 19 are connected to the button 20 by a return spring. The return spring provides a return force to the button 20. When the user releases the button 20, the return spring can push the button 20 back to its initial position, thereby driving the limiting plate 21 and the limiting tooth 22 to reset. The inner end of the button 20 extends into the interior of the movable block 5 and is fixedly installed with the limiting plate 21. The limiting plate 21 moves with the button. 20 moves synchronously, driving the limiting teeth 22 to engage or disengage with the hook plate 23, completing the switching of the limiting function. Several limiting teeth 22 are fixedly connected to the outer ends of the limiting plates 21. The teeth 22 and the hook plate 23 are matched with each other. The locking action fixes the position of the movable block 5, preventing the movable block 5 from moving accidentally during rehabilitation. Hook plates 23 are fixedly connected to both sides of the movable plate 2 near the position of each limiting plate 21. The toothed structure on the hook plate 23 cooperates with the limiting teeth 22 to form a reliable limiting mechanism, ensuring that the movable block 5 can be stably fixed after being adjusted to the appropriate position. Furthermore, support airbags 24 are fixedly installed on both sides of the inner bottom of the calf fixation frame 3. The support airbags 24 are made of flexible material, and after inflation, they can fit tightly against the bottom of the calf, providing additional support pressure while also having good cushioning performance to reduce localized pressure. A nitrogen storage chamber 25 is movably installed at the bottom of the calf fixation frame 3. The nitrogen storage chamber 25 stores nitrogen, providing a gas source for the inflation and deflation of the support airbags 24. Its sealed structure design ensures that the nitrogen will not leak, guaranteeing the pressure stability of the support airbags 24. (Thigh fixation frame...) An inner rod 26 is movably installed at the bottom of the 1. One end of the inner rod 26 is connected to the thigh fixation frame 1, and the other end is fixed to the rubber piston 27. It can drive the rubber piston 27 to move in the nitrogen storage chamber 25 with the flexion and extension of the lower leg. The end of the inner rod 26 extends into the interior of the nitrogen storage chamber 25 and is fixedly installed with the rubber piston 27. The rubber piston 27 fits tightly against the inner wall of the nitrogen storage chamber 25 and has good sealing performance. Its movement can change the air pressure inside the nitrogen storage chamber 25, thereby driving the flow of nitrogen in the support airbag 24 and realizing automatic adjustment of the support pressure. Furthermore, the inner ends of the support airbags 24 are connected by a connecting pipe, which allows the nitrogen inside the two support airbags 24 to circulate with each other, ensuring that the pressure of the two support airbags 24 is consistent and providing balanced support for the lower leg. A vent pipe 28 is fixedly installed in the middle of the connecting pipe, and the end of the vent pipe 28 extends to the inside side of the nitrogen storage chamber 25. The vent pipe 28 serves as a gas flow channel between the support airbags 24 and the nitrogen storage chamber 25, realizing bidirectional flow of nitrogen between the two and ensuring automatic adjustment of the support pressure. Furthermore, a copper cylinder 29 is fixedly installed at the bottom of the nitrogen storage chamber 25. The copper cylinder 29 provides a channel for the movement of the rubidium magnet 31. Its copper material has good conductivity, which can generate eddy currents when the rubidium magnet 31 moves, thereby forming a reverse magnetic field. The structural design of the copper cylinder 29 ensures the stable generation of eddy currents. A bent rod 30 is fixedly installed at the bottom of the inner rod 26. The bent rod 30 converts the linear movement of the inner rod 26 into the linear movement of the rubidium magnet 31, thus providing a path for the rubidium magnet to move. 31 provides power transmission, and its bending structure design is adapted to the overall layout of the device to ensure that the neodymium magnet 31 can be accurately inserted into the copper cylinder 29. The end of the bending rod 30 extends into the interior of the copper cylinder 29 and is fixedly installed with the neodymium magnet 31. The neodymium magnet 31 has strong magnetism, and when it moves inside the copper cylinder 29, it will cause a change in magnetic flux, thereby generating eddy currents and reverse magnetic fields, forming an electromagnetic repulsion force, which plays a role in slowing down and buffering the movement of the neodymium magnet 31, and preventing the lower leg from bending suddenly and significantly. Furthermore, several elastic straps 32 are fixedly installed on one side of the top of both the thigh fixation frame 1 and the lower leg fixation frame 3. The elastic straps 32 have good elasticity and can adapt to different limb sizes of patients, while providing continuous restraint for fixation, ensuring that the device fits tightly to the limb. On the other side of the top of both the thigh fixation frame 1 and the lower leg fixation frame 3, strap perforation rings 33 are fixedly installed. The strap perforation rings 33 provide a passage for the elastic straps 32 to pass through, facilitating the fixation operation of the elastic straps 32. Its structural design ensures that the elastic straps 32 will not easily fall off when passing through. Velcro 34 is provided at the end and middle of the elastic straps 32. The Velcro 34 has a convenient sticking and fixing function. Users can adjust the sticking position of the Velcro 34 to precisely adjust the tightness of the elastic straps 32, realizing quick wearing and fixing of the device, while ensuring the stability of the fixation. Furthermore, the outer surfaces of both the thigh fixation frame 1 and the calf fixation frame 3 are provided with several ventilation holes 35. The ventilation holes 35 penetrate the inner and outer surfaces of the fixation frame, which can promote air circulation between the inside and outside of the device, effectively dissipate the heat and moisture generated by the limbs, avoid the skin from becoming stuffy and damp due to prolonged wear, reduce discomfort, and improve wearing comfort. At the same time, the design of the ventilation holes 35 will not affect the structural strength of the fixation frame, ensuring that the support stability of the device is not affected.

[0023] Working principle: Place the thigh and calf in the thigh fixation bracket 1 and calf fixation bracket 3 respectively. Then, thread all the elastic straps 32 through the corresponding strap perforation rings 33 and secure them with Velcro 34. The support airbag 24 will provide additional support pressure. Then, press the buttons 20 at the upper and lower ends of the movable block 5 by hand. When the buttons 20 move inward, they will drive the limiting plate 21 to move accordingly, causing the limiting teeth 22 to release the limiting effect on the hook plate 23. At this time, push the movable block 5 inward with force. When the fixing clamp 12 contacts the calf, continue to push inward. At this time, the fixing clamp 12 will drive the rotating frame 7 to bend through the pressure rod 11 and the connecting rod 10. When the rotating frame 7 bends, it will bend the spring plate 8 through the pressure roller 9. The bent spring plate 8 will generate elastic force that reverses through the connecting rod 10 and the pressure rod 11. The fixation splint 12 provides pressure support, thereby supporting and fixing the fracture site of the lower leg. Using multiple sets of fixation splints 12 to support the lower leg allows the entire fixation structure to better conform to the patient's limb, increasing support strength. Furthermore, the pressure roller 9 slides relative to the surface of the bending spring plate 8 when bending it, causing the lever arm of the bent spring plate 8 to change. This compensates for the changing elastic force as the bending degree of the spring plate 8 changes, ensuring that the support force of the fixation splint 12 on the lower leg remains constant. This effectively prevents changes in the clamping force of the fixation splint 12 during rehabilitation exercises. When adjusting the clamping force of the fixation splint 12, rotating the adjustment knob 16 drives the active bevel gear 17 to rotate, which in turn drives the driven bevel gear 15 and... When the threaded rod 14 rotates, it drives the sliders 18 on both sides and the support platform 13 to move inward or outward synchronously. When the position of the support platform 13 changes, the fulcrum of the spring plate 8 when it bends also changes, and the elastic force generated when bending also changes, thereby realizing the adjustment of the clamping force of the fixation splint 12. The patient can adjust the clamping pressure of each fixation splint 12 according to the specific fracture location, making the clamping effect of the entire clamping structure more comfortable. When the patient performs flexion and extension exercises, when the lower leg is bent, the inner rod 26 drives the rubber piston 27 to move in the nitrogen storage chamber 25. At this time, the air pressure on one side of the nitrogen storage chamber 25 decreases, and the nitrogen in the support airbag 24 enters the nitrogen storage chamber 25 through the connecting pipe and the ventilation pipe 28. The supporting pressure of the airbag 24 on the lower leg decreases. When the lower leg extends, the nitrogen in the nitrogen storage chamber 25 returns to the supporting airbag 24 through the connecting pipe and the vent pipe 28, increasing the supporting pressure of the airbag 24 on the lower leg. This automatic adjustment of the supporting pressure of the airbag 24 on the lower leg prevents abnormal stress on the fracture ends. In addition, when the inner rod 26 moves, it also drives the neodymium magnet 31 at the end of the bending rod 30 to move within the copper cylinder 29. According to the combined effect of electromagnetic induction and Lenz's law, when the neodymium magnet 31 moves, the magnetic flux within the copper cylinder 29 changes with its position and generates eddy currents. These eddy currents excite a reverse magnetic field, which hinders the movement of the neodymium magnet 31 that causes the change in magnetic flux. The reverse magnetic field interacts with the original magnetic field of the magnet, producing opposite electromagnetic repulsion.This slows down the rubidium magnet 31, which is visually apparent as a noticeable resistance felt by the patient during flexion and extension movements. This prevents secondary injury caused by a sudden, large bend in the lower leg when the force is suddenly released.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable pressure fracture rehabilitation and fixation device, comprising a thigh fixation frame (1), characterized in that, Both ends of the thigh fixation bracket (1) are movably mounted with calf fixation brackets (3) via movable plates (2). Several through holes (4) are provided on both sides of the calf fixation bracket (3). Movable blocks (5) are movably installed inside each through hole (4). A crossbeam (6) is fixedly installed inside each movable block (5). Rotating brackets (7) are movably mounted on both sides of the crossbeam (6). Spring plates (8) are fixedly installed on both sides of the crossbeam (6), and the ends of the spring plates (8) extend to... Inside the rotating frame (7) on the corresponding side, a pressure roller (9) is fixedly installed on one end of the inner side wall of the rotating frame (7), and the end of the pressure roller (9) abuts against the inner surface of the spring plate (8) on the corresponding side. A connecting rod (10) is movably installed on one end of the rotating frame (7) near the lower leg fixing frame (3). A pressure rod (11) is movably installed at the end of the connecting rod (10). The end of the pressure rod (11) extends to the outside of the movable block (5) and is fixedly installed on both sides of the fixed clamping plate (12).

2. The adjustable pressure fracture rehabilitation and fixation device according to claim 1, characterized in that, Both sides of the cross frame (6) are movably mounted with support platforms (13), and the inner ends of the support platforms (13) abut against the outer surface of the corresponding spring plate (8).

3. The adjustable pressure fracture rehabilitation and fixation device according to claim 2, characterized in that, The movable block (5) has threaded rods (14) movably installed on both sides of the inner wall of the side closest to the cross frame (6). The outer diameter of the threaded rods (14) is threaded with sliders (18), and the inner end of the sliders (18) is fixedly connected to the outer end of the support platform (13) on the corresponding side.

4. The adjustable pressure fracture rehabilitation and fixation device according to claim 3, characterized in that, The inner end of each threaded rod (14) is fixedly equipped with a driven bevel gear (15), and the middle of the outer end of each movable block (5) is movably equipped with an adjustment knob (16). The middle of each adjustment knob (16) extends through a movable shaft to the interior of the corresponding movable block (5) and is fixedly equipped with a driving bevel gear (17). The two ends of the driving bevel gear (17) are respectively engaged and connected to the inner ends of the two adjustment knobs (16).

5. The adjustable pressure fracture rehabilitation and fixation device according to claim 1, characterized in that, The upper and lower ends of the movable block (5) are provided with straight slots (19). The upper and lower ends of the movable block (5) are connected to a button (20) by a reset spring on the side of the straight slot (19). The inner end of the button (20) extends into the interior of the movable block (5) and is fixedly installed with a limiting plate (21). The outer end of the limiting plate (21) is fixedly connected with several limiting teeth (22). The two sides of the movable disc (2) are fixedly connected with hook plates (23) near each limiting plate (21).

6. The adjustable pressure fracture rehabilitation and fixation device according to claim 1, characterized in that, The lower leg fixation frame (3) has a support airbag (24) fixedly installed on both sides of the inner bottom. The lower leg fixation frame (3) has a nitrogen storage chamber (25) movably installed at the bottom end. The thigh fixation frame (1) has an inner rod (26) movably installed at the bottom end. The end of the inner rod (26) extends into the nitrogen storage chamber (25) and is fixedly installed with a rubber piston (27).

7. The adjustable pressure fracture rehabilitation and fixation device according to claim 6, characterized in that, The inner end of the support airbag (24) is connected by a connecting pipe, and a vent pipe (28) is fixedly installed in the middle of the connecting pipe and the end of the vent pipe (28) extends to the inside side of the nitrogen storage chamber (25).

8. The adjustable pressure fracture rehabilitation and fixation device according to claim 7, characterized in that, A copper cylinder (29) is fixedly installed at the bottom of the nitrogen storage chamber (25), and a bent rod (30) is fixedly installed at the bottom of the inner rod (26). The end of the bent rod (30) extends into the interior of the copper cylinder (29) and is fixedly installed with a rubidium magnet (31).

9. The adjustable pressure fracture rehabilitation and fixation device according to claim 1, characterized in that, Several elastic straps (32) are fixedly installed on one side of the top of the thigh fixation frame (1) and the calf fixation frame (3), and strap perforated rings (33) are fixedly installed on the other side of the top of the thigh fixation frame (1) and the calf fixation frame (3). Velcro (34) is provided at the end and middle of the elastic straps (32).

10. The adjustable pressure fracture rehabilitation and fixation device according to claim 1, characterized in that, The outer surfaces of the thigh fixation frame (1) and the calf fixation frame (3) are provided with several ventilation holes (35).

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