Support for arthroscopic surgery in sports medicine

Abstract

The invention relates to the technical field of arthroscopic surgery instruments, in particular to a support for a sports medicine arthroscopic surgery, which comprises a support, a lifting platform and a leg fixing mechanism, and the lifting platform locks the height position of the leg fixing mechanism on the support through a limiting bolt; the leg fixing mechanism comprises a fixed frame fixedly connected with the lifting table and a movable frame hinged through a rotating connector. The pull rope is wound around the guide wheel in the sliding rail box to be connected with the shank binding belt, and when the knee joint bends and stretches, the second spring pushes the sliding block to move in a self-adaptive mode; during knee bending, the spring extends to compensate looseness of the pull rope; when the knees stretch, the springs are compressed to absorb redundant tension. The tensile force is always perpendicular to the shank axis through mechanical decomposition, and lateral shearing force is eliminated. A spring dynamic compensation mechanism maintains constant upward effective component force, pulling force direction deviation caused by a traditional fixed fulcrum is avoided, unexpected internal rotation during shank lifting is fundamentally restrained, and knee joint ligaments are protected against abnormal stress damage.

Description

Technical Field

[0001] This invention relates to the field of arthroscopic surgical instruments, specifically to a support for arthroscopic surgery in sports medicine. Background Technology

[0002] With the rapid development of sports medicine, arthroscopic surgery has become one of the mainstream methods for treating sports injuries and restoring motor function. Due to its minimally invasive nature, arthroscopic surgery can perform complex surgical procedures through smaller incisions, reducing patient recovery time and the risk of complications. However, when performing arthroscopic surgery on joints such as the knee and shoulder, the precision and safety of the procedure remain key concerns for clinicians.

[0003] During arthroscopic surgery, such as knee surgery, the patient's knee needs to be repeatedly bent during arthroscopic insertion to visualize the internal structure of the joint. While existing leg braces can stabilize the leg during knee flexion and extension, the knee joint, primarily composed of the femur, tibia, and patella, possesses an anatomical structure that allows the lower leg to not only flex and extend but also rotate internally and externally. During surgery, the surgeon applies force to control the lower leg's position. If this force is applied unevenly, the lower leg may deflect laterally instead of moving along a straight trajectory, leading to a mismatch between the brace's rotation axis and the knee joint's instantaneous rotation center. Repeated bending generates abnormal shear forces, causing the knee joint to be in an unstable position, affecting the surgeon's field of vision and precision, and increasing the risk of surgical failure. Furthermore, if the lower leg deflects during knee flexion and extension, the arthroscopic lens may become misaligned with the target anatomical region. The surgeon must frequently adjust the lens angle or apply additional force to correct the position, not only prolonging the surgery time but also potentially increasing the risk of errors due to blurred vision.

[0004] Therefore, a stent for arthroscopic surgery in sports medicine is proposed to address the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a support for arthroscopic surgery in sports medicine, solving the problem in the prior art where the rotation axis is mismatched with the instantaneous rotation center of the human knee joint due to lower leg deflection during knee surgery. It achieves millimeter-level precision control of the knee joint angle, enabling surgeons to obtain a stable operating field during arthroscopic surgery, while avoiding damage to the joint from abnormal shearing forces, significantly improving surgical safety and operational efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a support for arthroscopic surgery in sports medicine, comprising a support, a lifting platform and a leg fixation mechanism, wherein the lifting platform locks the height position of the leg fixation mechanism on the support by a limiting bolt; The leg fixation mechanism includes a fixed frame fixedly connected to the lifting platform and a movable frame hinged by a rotary joint. The fixed frame is equipped with a thigh binding strap and the movable frame is equipped with a calf binding strap, which are used to fix the patient's lower limbs and ensure that the rotation center matches during knee flexion and extension movements. Also includes: The height adjustment mechanism consists of a ball screw and a ball nut. The ball nut is connected to a fixed plate and pulls a rope to control the lifting angle of the lower leg. The dynamic compensation component includes a slider, a second spring, and a guide wheel mounted on the slide box, which is used to dynamically adjust the length of the pull rope path and maintain the direction of the pull force perpendicular to the axis of the lower leg. The synchronous inflation and fixation mechanism consists of a piston rod, a sleeve, and an airbag inside the calf strap. The airbag automatically inflates and deflates with height adjustment to suppress calf deflection.

[0007] Furthermore, the front end of the movable frame is connected to the footrest via a sliding sleeve, and a multi-degree-of-freedom adjustable rotating connecting plate is provided between the sliding sleeve and the footrest. The movable frame and the sliding sleeve, the rotating connecting plate and the sliding sleeve, and the footrest are all detachably connected by adjusting bolts.

[0008] Furthermore, both the thigh binding strap and the calf binding strap are equipped with buckles to adjust the tightness of the binding.

[0009] Furthermore, a crossbeam is connected above the bracket, and the ball screw is rotatably connected to a fixed switch set on the crossbeam. One end of the ball screw inserted into the fixed switch is connected to a turntable, and the fixed switch is provided with a clamping block to clamp or release the turntable.

[0010] Furthermore, the fixed switch has guide rails on both sides of the turntable. The clamping block is slidably mounted on the guide rails by a first spring. The other end of the first spring is connected to the inner wall of the fixed switch. The fixed switch has a sliding plate provided by a threaded rod. The sliding plate has a push block that can push the clamping block.

[0011] Furthermore, a positioning block is slidably mounted on the surface of the crossbeam, and the slide rail box of the dynamic compensation component is disposed on the positioning block.

[0012] Furthermore, the sleeve is disposed on the surface of the crossbeam and is distributed parallel to the ball screw. One end of the piston rod is inserted into the sleeve, and the other end is connected to the fixed plate. The sleeve is connected to the airbag through a connecting pipe.

[0013] Furthermore, the airbag is positioned on the inner side of the calf strap near the knee joint.

[0014] Furthermore, the outer side of the calf binding strap is provided with a reinforcing hoop for connecting the pull rope, and the reinforcing hoop and the inner airbag together form a fixed constraint on the calf.

[0015] Furthermore, the pull rope slides within a groove on the surface of the second spring to maintain a stable direction of tension.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes a turntable to drive a ball screw, which in turn moves a ball nut linearly. The ball nut pulls a fixing plate and a rope, lifting the lower leg strap upwards. A locking switch secures the turntable with a clamp, achieving height fixation. This allows for millimeter-level precise adjustment of the knee flexion and extension angles, perfectly matching the instantaneous rotation center of the human knee joint. Compared to traditional manual pulling, it eliminates the risk of lower leg deflection due to uneven force application, ensuring a stable arthroscopic view during surgery. The stepless adjustment of the ball screw can adapt to the anatomical differences of patients with different body types, making it particularly suitable for complex surgical scenarios requiring repeated angle adjustments.

[0017] This invention connects a lower leg binding strap via a pull rope that winds around a guide wheel inside a slide rail box. During knee flexion and extension, a second spring pushes a slider to move adaptively. During knee flexion, the spring extends to compensate for rope slack; during knee extension, the spring compresses to absorb excess tension. Through mechanical decomposition, the pulling force is ensured to always be perpendicular to the lower leg axis, eliminating lateral shear force. The dynamic spring compensation mechanism maintains a constant upward effective force component, avoiding the force direction deviation caused by traditional fixed fulcrums, fundamentally suppressing unintended internal rotation during lower leg elevation, and protecting the knee ligaments from abnormal stress damage.

[0018] This invention utilizes a piston rod driven by the movement of a ball bearing nut to compress gas in a sleeve. The gas is then injected through a connecting tube into an air bladder inside the calf binding strap. The air bladder inflates, forming a ring-shaped pressure band to fix the tibia. The air bladder generates evenly distributed flexible pressure in the key contact area of ​​the tibia, creating a rigid-flexible fixation effect combined with the external reinforcing band. The inflation process is synchronized with the lifting action, preventing calf slippage and avoiding vascular and nerve compression caused by rigid fixation. Deflating the air automatically releases the restraint, facilitating quick switching of the knee flexion angle.

[0019] In summary, this stent achieves biomimetic motion control while ensuring rigid support through the synergistic effect of mechanical transmission, fluid control, and elastic elements. All innovations revolve around the core goal of precisely matching the biomechanical characteristics of the knee joint, solving key problems such as rotational axis misalignment, abnormal lateral shear force, and unstable fixation inherent in traditional stents, and providing a revolutionary position management solution for arthroscopic surgery. Attached Figure Description

[0020] Figure 1 This is a front view of the overall structure of the arthroscopic surgical support in an embodiment of the present invention; Figure 2 This is a rear view of the overall structure of the arthroscopic surgical support in an embodiment of the present invention; Figure 3 This is a top view schematic diagram of the overall structure of the arthroscopic surgical support in an embodiment of the present invention; Figure 4 This is a front view schematic diagram of the overall structure of the arthroscopic surgical support in an embodiment of the present invention; Figure 5 This is a schematic diagram of the leg fixing mechanism above in an embodiment of the present invention; Figure 6 This is a schematic diagram of the leg fixing mechanism in an embodiment of the present invention. Figure 7 This is a schematic diagram of the synchronous inflation fixing mechanism in an embodiment of the present invention; Figure 8 This is a schematic diagram illustrating the function of the pull rope in an embodiment of the present invention; Figure 9 This is a schematic diagram of the dynamic compensation component structure in an embodiment of the present invention; Figure 10 This is a schematic diagram of the internal structure of the fixed switch in an embodiment of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: 1. Bracket; 2. Lifting platform; 3. Leg fixing mechanism; 301. Fixing frame; 302. Thigh binding strap; 303. Rotary joint; 304. Movable frame; 305. Lower leg binding strap; 306. Sliding sleeve; 307. Rotating connecting plate; 308. Adjusting bolt; 309. Footrest; 310. Reinforcing hoop; 311. Buckle; 4. Limit bolt; 5. Crossbeam; 6. Fixing switch; 601. Guide rail; 602. First spring; 603. Clamping block; 604. Threaded rod; 605. Slide plate; 606. Push block; 7. Ball screw; 8. Ball nut; 9. Fixing plate; 10. Pull rope; 11. Positioning block; 12. Slide rail box; 13. Second spring; 14. Slider; 15. Guide wheel; 16. Piston rod; 17. Sleeve; 18. Connecting pipe; 19. Airbag; 20. Turntable. Detailed Implementation

[0022] The technical solutions of 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.

[0023] This invention provides a technical solution: such as Figure 1 - Figure 10The arthroscopic support shown here, through the synergistic design of a rotating joint, a sliding positioning block, and a dynamic compensation component, combined with the force decomposition of the guide wheel and the pressure dispersion of the reinforcing belt, systematically solves the problems of abnormal shear force on the knee joint, lateral deflection of the lower leg, and intraoperative instability caused by the mismatch of the rotation center of traditional supports. It achieves precise control of traction direction, dynamic matching of anatomical axis, and soft tissue protection, significantly improving the operation accuracy and safety of arthroscopic surgery.

[0024] Specifically, such as Figure 1-4 As shown, a lifting platform 2 for adjusting the height of the leg fixation mechanism 3 is slidably mounted on the surface of the support 1. The leg fixation mechanism 3 is worn on the patient's leg, achieving a stable raised position of the patient's leg on the support 1, providing a stable operating platform for the doctor, reducing the risk of patient movement, and ensuring a clear view of the internal joint. By fixing the support 1 to the operating table, the entire support can be rigidly fixed, ensuring the stability of the doctor's knee joint adjustment during surgery. In addition, by fixing the support 1 to the operating table, the entire support and the operating table can be sterilized simultaneously, ensuring medical and health safety during surgery. The surface of the lifting platform 2 has threaded holes and is fitted with limiting bolts 4. The front end of the limiting bolts 4 penetrates the lifting platform 2 and abuts against the surface of the support 1. By controlling the sliding of the lifting platform 2 on the support 1 and locking it with the limiting bolts 4, the overall height of the leg fixation mechanism 3 can be adjusted, thereby adjusting the raised height of the patient's leg and helping the doctor quickly find the optimal operating angle.

[0025] More specifically, such as Figure 5 and Figure 6 As shown, the leg fixation mechanism 3 includes a fixation frame 301 mounted on the lifting platform 2. A thigh binding strap 302 is connected to the side of the fixation frame 301 facing away from the support 1. By wrapping the thigh binding strap 302 around the patient's leg and securing it with buckles 311 on its surface, the inner wall of the thigh binding strap 302 is in close contact with the surface of the patient's thigh, thus fixing the patient's thigh on the thigh binding strap 302. A rotating joint 303 is connected to the front end of the fixation frame 301, and a movable frame 304 is rotatably connected to it through the rotating joint 303. A lower leg binding strap 305 is connected to the surface of the movable frame 304 facing away from the support 1. Buckles 311 are also provided on the lower leg binding strap 305. By wrapping the lower leg binding strap 305 around the surface of the patient's lower leg, the patient's lower leg can be fixed on the leg fixation mechanism 3. This ensures that the patient's leg remains in a stable raised position during the operation. Furthermore, the tightness of the thigh binding strap 302 and the calf binding strap 305 can be adjusted by using the buckle 311, which can avoid the poor adaptability of the device due to differences in the leg thickness of different patients.

[0026] The fixed frame 301 and the movable frame 304 are rotatably connected via a rotating joint 303. The position of the rotating joint 303 matches the center of the patient's knee joint, allowing the doctor to control the swinging of the patient's lower leg by performing flexion and extension movements around the patient's knee joint. This enables bending control between the thigh and lower leg, effectively exposing the operating field of vision at the knee joint and improving operational accuracy. Furthermore, the rigid structure of the fixed frame 301 and the movable frame 304 prevents horizontal displacement of the patient's knee joint during flexion and extension movements, thus ensuring the horizontal fixation of the knee joint position.

[0027] A footrest 309 is slidably mounted on the front end of the movable frame 304 to support the patient's foot. During arthroscopic surgery, the surgeon needs to repeatedly adjust the flexion and extension angles of the leg; the footrest 309 reduces accidental movement caused by unsupported feet. The footrest 309 is rotatably connected to and fixedly positioned on the rotating connecting plate 307 via an adjusting bolt 308. The rotating connecting plate 307 is also rotatably connected to and fixedly positioned on the sliding sleeve 306 via an adjusting bolt 308. The sliding sleeve 306 is slidably mounted on the front end of the movable frame 304 and fixedly positioned via the adjusting bolt 308. This allows the footrest 309 to naturally invert or evert with the patient's foot, avoiding stress concentration in the joint caused by forced fixation.

[0028] The difference is, for example Figure 4 , Figure 7 , Figure 8As shown, a crossbeam 5 is connected above the support 1. A fixed switch 6, rotatably connected to a ball screw 7, is located at the front end of the crossbeam 5. A ball nut 8 is fitted onto the surface of the ball screw 7. By rotating the ball screw 7, the rotational motion can be converted into linear sliding of the ball nut 8 on its surface. A fixed plate 9 is fixedly connected to the surface of the ball nut 8. A pull rope 10 is connected to the side of the fixed plate 9 facing the leg fixation mechanism 3. The other end of the pull rope 10 is connected to a reinforcing hoop 310 on the surface of the calf binding strap 305. When the ball screw 7 controls the ball nut 8 to slide away from the fixed switch 6, the sliding of the ball nut 8 directly drives the fixed plate 9 to move synchronously, causing the tension of the pull rope 10 to change synchronously. The pull of the pull rope 10 then lifts the calf binding strap 305, achieving control over the patient's calf elevation. Furthermore, through the stepless height adjustment of the ball screw 7 and ball nut 8, millimeter-level precise control of the calf elevation height can be achieved compared to manual pulling. In particular, compared to the difficulty in precisely controlling the lifting angle when manually pulling, the sliding distance of the ball nut 8 corresponds linearly to the lifting angle, allowing for more precise control during knee surgery. Since the patient's thigh is fixed to the fixation frame 301, when the patient's lower leg is lifted, it rotates around the rotating joint 303, perfectly matching the instantaneous rotation axis of the human knee joint—that is, rotating around the patient's knee joint. Simultaneously, the reinforcing clamp 310 evenly distributes the traction force of the pull rope 10 to the surface of the lower leg, making the leg lifting more stable, suppressing unintended internal rotation during lower leg lifting, and ensuring that the knee joint only performs pure flexion and extension movements along the axis of the rotating joint 303. This solves the problems of inaccuracy and abnormal joint stress during manual lower leg lifting, and is especially suitable for complex arthroscopic surgeries requiring repeated adjustments to leg position.

[0029] like Figure 10As shown, a turntable 20 is connected to one end of the ball screw 7 inserted into the fixed switch 6. Inside the fixed switch 6, guide rails 601 are provided on both sides of the turntable 20. Clamping blocks 603 are slidably mounted on the guide rails 601. A first spring 602 is connected to the surface of the clamping blocks 603, and the other end of the first spring 602 is connected to the inner wall of the fixed switch 6. Under the tension of the first spring 602, the clamping blocks 603 always tend to move away from the turntable 20. A threaded hole is provided on the surface of the fixed switch 6 facing the leg fixing mechanism 3, and a threaded rod 604 is inserted accordingly. A sliding plate 605 is connected to one end of the threaded rod 604 inside the fixed switch 6. Two sets of symmetrically distributed push blocks 606 are provided on the surface of the sliding plate 605, with the two sets of push blocks 606 located outside the two sets of clamping blocks 603, respectively. Both sets of clamping blocks 603 and two sets of push blocks 606 are trapezoidal in shape. The inclined surface of the clamping block 603 is located on the side facing away from the turntable 20, and the inclined surface of the push block 606 is located on the side facing the inclined surface of the clamping block 603. When the ball screw 7 is used to adjust the movement of the ball nut 8 and control the pull rope 10 to lift the patient's lower leg, after the patient's knee joint rotates to a suitable angle, the rotating threaded rod 604 controls the slide plate 605 to slide into the fixed switch 6, thereby causing the push block 606 to slide towards the clamping block 603. The inclined surface of the push block 606 will abut against the inclined surface of the clamping block 603 and push the clamping block 603 to overcome the tension of the first spring 602 and slide towards the turntable 20, thereby clamping and fixing the turntable 20 with the two sets of clamping blocks 603, and locking the ball screw 7. At this time, the ball nut 8 will not shift due to the weight of the patient's leg pulling the rope 10, thus achieving fixation of the patient's knee joint position after adjustment and avoiding positional displacement during surgery. When it is necessary to readjust the ball screw 7, by rotating the threaded rod 604 in the opposite direction, the push block 606 can be moved away from the clamping block 603, thereby causing the clamping block 603 to reset under the tension of the first spring 602, releasing the clamping fixation on the turntable 20.

[0030] After the fixed switch 6 releases the lock on the turntable 20, the ball screw 7 is slowly and manually released, causing the ball nut 8 to slide towards the fixed switch 6 under the weight of the patient's leg, thereby controlling the flexion and extension of the patient's knee joint. This eliminates the need for an assistant to manually position the device, allowing the doctor to complete multi-angle switching with just one hand by operating the ball screw 7.

[0031] It is worth noting that, such as Figure 8 , Figure 9As shown, a positioning block 11 is slidably mounted on the surface of the crossbeam 5. A slide rail box 12 is connected to the front end of the positioning block 11, and a slider 14 is slidably mounted on the slide rail box 12 via a second spring 13. A guide wheel 15 is rotatably connected to the surface of the slider 14, and the guide wheel 15 is located directly above the calf binding strap 305. A pull rope 10 connected to the surface of the fixing plate 9 passes around the surface of the guide wheel 15 and is connected to the calf binding strap 305. When the ball nut 8 controls the pull rope 10 to pull the calf binding strap 305 and controls the patient's calf to rise, the guide wheel 15 serves as the force conversion fulcrum of the pull rope 10. The guide wheel 15 can be used to adjust the horizontal application point of the traction force of the pull rope 10, keeping the direction of the pull force always perpendicular to the calf. The traction force of the pull rope 10 is always decomposed into an effective component perpendicular to the calf axis, eliminating the lateral shear component, thereby avoiding axial inward rotation when the calf is lifted, which would cause the knee joint position to shift. When the knee joint flexes and extends, the change in its axial internal rotation angle causes a certain displacement of the lower leg binding strap 305, which in turn causes a change in the length of the pull rope 10. The elasticity of the second spring 13 compensates for this change in the length of the pull rope 10, maintaining a constant direction of tension. Specifically: When the knee is bent: the lower leg is close to the thigh, the length of the pull rope 10 increases and relaxes. At this time, the second spring 13 is in the extended state, pushing the guide wheel 15 to move towards the patient, tightening the pull rope 10, and maintaining stable tension. When the knee is extended: the lower leg moves away from the thigh, the rope length decreases and becomes too tight. At this time, the second spring 13 is in a compressed state, absorbing excess tension, causing the guide wheel 15 to move away from the patient, thus relieving the excessive tightness of the rope 10.

[0032] The surface of the second spring 13 is provided with a groove, and the pull rope 10 is inserted into the groove in a matching manner, which can prevent the pull rope 10 from shifting position during the stretching process, thus causing the direction of the pulling force to change.

[0033] The surface of the positioning block 11 is also provided with threaded holes and a limit bolt 4 is inserted therein. The positioning block 11 is locked after the position on the surface of the crossbeam 5 is adjusted. By adjusting the position of the positioning block 11, the position of the guide wheel 15 relative to the lower leg binding strap 305 can be changed, and the traction angle of the pull rope 10 can be adjusted so that it is perpendicular to the upper part of the lower leg.

[0034] Special attention should be paid to, such as Figure 7 , Figure 8As shown, a sleeve 17 is fixedly connected to the surface of the crossbeam 5, and the sleeve 17 and the ball screw 7 are distributed in parallel. A piston rod 16 is connected to the surface of the fixing plate 9, and the other end of the piston rod 16 is inserted into the inside of the sleeve 17. The sleeve 17 is connected to the airbag 19 provided on the inner wall of the lower leg binding strap 305 through the connecting tube 18. The airbag 19, the connecting tube 18, and the sleeve 17 are filled with gas. When the ball nut 8 drives the fixing plate 9 to move synchronously, it controls the piston rod 16 to slide linearly in the sleeve 17, thereby regulating the gas in the sleeve 17. When the ball nut 8 slides away from the fixed switch 6 and controls the pull rope 10 to pull the patient's lower leg up, the fixing plate 9 will synchronously control the piston rod 16 to slide in the sleeve 17 towards the fixed switch 6, and squeeze the gas in the sleeve 17 into the airbag 19 through the connecting tube 18. The airbag 19 will then inflate. Because the lower leg binding strap 305 is tightly bound to the surface of the patient's lower leg, the inflated airbag 19 forms a ring-shaped pressure band with the outer reinforcing band 310, eliminating the risk of slippage between the patient's lower leg and the lower leg binding strap 305 during leg elevation, while also inhibiting the tendency of the lower leg to rotate internally during elevation, thus effectively preventing knee joint displacement. The airbag 19 is made of a flexible silicone-like material, which can prevent pressure injury to the tibia and increase friction. The airbag 19 is located on the upper left inner wall of the lower leg binding strap 305, corresponding to the tibia of the patient's lower leg. During knee flexion and extension, the medial rotation of the lower leg is mainly concentrated in the early to middle stages of knee flexion. At this time, the femoral condyle slides on the tibial plateau, causing the lower leg to shift medially. The area above the femoral condyle, near the knee joint, is the initial path of medial rotation of the lower leg. Therefore, the airbag 19 is located on the upper part of the lower leg binding strap 305 (anatomically based on the patient's right leg), close to the knee joint. When the lower leg begins to rotate inward, the upper airbag 19 will be the first to contact the inner surface of the lower leg. After inflating, it can directly block the initial displacement of the rotation, thus limiting it in advance. This can more effectively block the initial force of the inward rotation and prevent the rotation amplitude from expanding. In addition, the position of the upper airbag 19 is also more ergonomic. When the lower leg is naturally flexed and extended, the upper airbag 19 fits the lower leg more closely, and the pressure of the inflated airbag 19 is transmitted more evenly, making it less likely to cause local pressure.

[0035] When the ball nut 8 slides closer to the fixed switch 6, the fixed plate 9 controls the piston rod 16 to slide away from the fixed switch 6 inside the sleeve 17, thereby drawing the gas in the airbag 19 back into the sleeve 17 through the connecting pipe 18, realizing the deflation and contraction of the airbag 19, and realizing the switching of the knee flexion angle.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] 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. A support for arthroscopic surgery in sports medicine, comprising a support (1), a lifting platform (2), and a leg fixation mechanism (3), characterized in that, The lifting platform (2) locks the height position of the leg fixing mechanism (3) on the bracket (1) by the limiting bolt (4); The leg fixation mechanism (3) includes a fixed frame (301) fixedly connected to the lifting platform (2) and a movable frame (304) hinged through a rotating joint (303). The fixed frame (301) is provided with a thigh binding strap (302), and the movable frame (304) is provided with a calf binding strap (305) for fixing the patient's lower limbs and ensuring that the rotation center matches during knee flexion and extension movements. Also includes: The height adjustment mechanism consists of a ball screw (7) and a ball nut (8). The ball nut (8) is connected to a fixed plate (9) and pulls a rope (10) to control the lifting angle of the lower leg. The dynamic compensation component includes a slider (14), a second spring (13), and a guide wheel (15) mounted on the slide box (12) for dynamically adjusting the path length of the pull rope (10) and maintaining the direction of the pull force perpendicular to the axis of the lower leg. The synchronous inflation and fixation mechanism consists of a piston rod (16), a sleeve (17), and an airbag (19) inside the calf binding strap (305). The airbag (19) automatically inflates and deflates with height adjustment to suppress calf deflection.

2. The arthroscopic surgical support for sports medicine according to claim 1, characterized in that, The front end of the movable frame (304) is connected to the footrest (309) via a sliding sleeve (306). A multi-degree-of-freedom adjustable rotating connecting plate (307) is provided between the sliding sleeve (306) and the footrest (309). The movable frame (304) and the sliding sleeve (306), the rotating connecting plate (307) and the sliding sleeve (306), and the footrest (309) are all detachably connected via adjusting bolts (308).

3. The arthroscopic surgical support for sports medicine according to claim 1, characterized in that, Both the thigh binding strap (302) and the calf binding strap (305) are equipped with buckles (311) for adjusting the tightness of the binding.

4. The arthroscopic surgical support for sports medicine according to claim 1, characterized in that, A crossbeam (5) is connected above the bracket (1). The ball screw (7) is rotatably connected to a fixed switch (6) set on the crossbeam (5). One end of the ball screw (7) inserted into the fixed switch (6) is connected to a turntable (20). The fixed switch (6) is provided with a clamping block (603) for clamping or releasing the turntable (20).

5. A stent for arthroscopic surgery in sports medicine according to claim 4, characterized in that, The fixed switch (6) is provided with guide rails (601) on both sides of the turntable (20). The clamp (603) is slidably mounted on the guide rail (601) by a first spring (602). The other end of the first spring (602) is connected to the inner wall of the fixed switch (6). The fixed switch (6) is provided with a sliding plate (605) by a threaded rod (604). The sliding plate (605) is provided with a pusher (606) that can push the clamp (603).

6. A stent for arthroscopic surgery in sports medicine according to claim 4, characterized in that, The surface of the crossbeam (5) is slidably mounted with a positioning block (11), and the slide box (12) of the dynamic compensation component is set on the positioning block (11).

7. A stent for arthroscopic surgery in sports medicine according to claim 4, characterized in that, The sleeve (17) is set on the surface of the crossbeam (5) and is distributed in parallel with the ball screw (7). One end of the piston rod (16) is inserted into the sleeve (17) and the other end is connected to the fixing plate (9). The sleeve (17) is connected to the airbag (19) through the connecting pipe (18).

8. A stent for arthroscopic surgery in sports medicine according to claim 1, characterized in that, The airbag (19) is positioned on the inner side of the lower leg strap (305) near the knee joint.

9. A stent for arthroscopic surgery in sports medicine according to claim 8, characterized in that, The lower leg binding strap (305) is provided with a reinforcing hoop (310) on the outside of the connecting rope (10), and the reinforcing hoop (310) and the inner airbag (19) together form a fixed constraint on the lower leg.

10. A stent for arthroscopic surgery in sports medicine according to claim 9, characterized in that, The pull rope (10) slides in the groove provided on the surface of the second spring (13) to keep the direction of the pulling force stable.

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