An orthopedic knee joint fixing auxiliary training device

Abstract

The application relates to the technical field of knee joint fixation, and discloses an orthopedic knee joint fixation auxiliary training device, which comprises fixed plates one and two. Slotted grooves are arranged on the left and right ends of the adjacent sides of the fixed plates one and two. A plurality of movable rods are slidably connected to the inner sides of the slotted grooves. A rotating shaft is rotatably connected to the bottom of the movable rod on the upper side. The rotating shaft is rotatably connected with the movable rod on the lower side. An auxiliary mechanism is arranged on the outer sides of the fixed plates one and two. The auxiliary mechanism comprises a shell which is arranged on the left wall of the movable rod on the left upper side. The rotating shaft is driven to rotate through cooperation of a servo motor and a speed reducer, power-assisted training is provided for patients in the early stage of rehabilitation, the motor is disconnected by pulling out the connecting piece, at this time, the patient actively bends the leg to drive the fixed plate two to rotate, the connecting rod is compressed or stretched to compress or stretch the damping rod, and convenient switching from passive power assistance to active resistance training mode is realized.

Description

Technical Field

[0001] This invention relates to the field of knee joint fixation technology, specifically to an orthopedic knee joint fixation auxiliary training device. Background Technology

[0002] The knee joint is the largest, most complex, and strongest joint in the human body, playing a vital role in standing, walking, and various sports. However, knee injuries are extremely common in orthopedic clinics, including tibial plateau fractures, femoral condyle fractures, meniscus injuries, and cruciate ligament ruptures. These injuries often require surgical reduction and internal fixation or external fixation with plaster casts and braces to promote bone and soft tissue healing.

[0003] During the rehabilitation process after knee injury or surgery, the affected limb needs to be immobilized and fixed for a long time, which can lead to atrophy of the muscles around the knee joint, joint capsule contracture, and joint adhesions, thus seriously affecting the patient's walking function in the later stage. Therefore, in orthopedic treatment, it is necessary to effectively fix the affected limb to protect the damaged area, and to carry out appropriate functional exercises during the rehabilitation period.

[0004] Existing knee joint fixation and assistive training devices mainly consist of a thigh support and a lower leg support, providing only a single support and fixation function. This leads to joint stiffness in patients after prolonged bed rest. To address this issue, a rotation mechanism has been added to existing technologies. By setting a program, the affected limb is forced to move, enabling early passive rehabilitation training. However, in actual use, the direct-drive or geared motor connection usually has significant transmission resistance or self-locking characteristics. When patients enter the later stages of rehabilitation and their muscle strength recovers, requiring active flexion and extension exercises to strengthen muscles, the motor and geared mechanism become significant obstacles. Patients struggle to overcome the motor's resistance or self-locking torque to actively rotate the device. Although the connection can be disengaged by removing the motor, the process is extremely cumbersome. After disengaging the motor, the device often becomes completely free-rotating, lacking suitable resistance to assist patients in resistance training. This significantly reduces the rehabilitation effect and fails to meet the patient's need for a smooth transition from passive assistance to active resistance rehabilitation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an orthopedic knee joint fixation and auxiliary training device, which solves the problems of existing knee joint auxiliary training devices causing patients to have difficulty overcoming motor resistance or self-locking torque for active flexion and extension training in the later stages of rehabilitation, and lacking suitable damping structures to assist patients in resistance enhancement training.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an orthopedic knee joint fixation auxiliary training device, comprising a fixation plate one and a fixation plate two, wherein sliding grooves are provided on the left and right ends of adjacent sides of the fixation plate one and the fixation plate two, and movable rods are slidably connected to the inner sides of multiple sliding grooves, and a rotating shaft is rotatably connected to the bottom of the upper movable rod, and the outer side of the rotating shaft is rotatably connected to the lower movable rod, an auxiliary mechanism is provided on the outer side of the fixation plate one and the fixation plate two, an adjustment mechanism is provided on adjacent sides of the fixation plate one and the fixation plate two, and a fixing mechanism is provided on the rear side of the fixation plate one and the fixation plate two; The auxiliary mechanism includes a housing, which is disposed on the left wall of the upper left movable rod. A servo motor is fixedly connected inside the housing, and a reducer is fixedly connected to the output end of the servo motor. The left end of the left rotating shaft passes through the housing and is fixedly connected to the output end of the reducer. A connecting rod is rotatably connected to one end of the left and right sides of the first and second fixed plates. The bottom end of the upper connecting rod is rotatably connected to the lower connecting rod. A damping rod is rotatably connected to the middle of the left and right sides of the first and second fixed plates, and the damping rod is rotatably connected to the connecting rod.

[0007] Preferably, the adjustment mechanism includes two hollow plates, which are respectively fixedly connected to the front sides of fixed plate one and fixed plate two. Support plates are slidably connected to the inner sides of the two hollow plates. Wedge-shaped blocks are fixedly connected to the left and right ends of the rear walls of the two support plates. Multiple slots are equidistantly opened on the front sides of the multiple movable rods. The outer sides of the multiple wedge-shaped blocks pass through the corresponding fixed plate one and fixed plate two and engage with the slots.

[0008] Preferably, the fixing mechanism includes multiple movable plates, which are rotatably connected to the rear left and right ends of fixed plate one and fixed plate two, respectively. Multiple hollow columns are fixedly connected to the inner sides of fixed plate one, fixed plate two and movable plates. Movable columns are slidably connected to the inner sides of the hollow columns. One end of the movable column passes through the hollow column and is fixedly connected to a ball head. A support ring is fixedly connected to the outer side of the movable column. A spring two is provided on the front side of the support ring. A connecting seat is rotatably connected to the outer side of the ball head. An arc-shaped piece is fixedly connected to the rear side of the connecting seat.

[0009] Preferably, the auxiliary mechanism further includes a square groove, which is formed at the right end of the left rotating shaft. A connecting piece is engaged inside the square groove, and a groove is formed on the top right wall of the lower left movable rod, which engages with the connecting piece.

[0010] Preferably, the auxiliary mechanism further includes a magnet piece, and a magnet piece is fixedly connected to the inner side of the groove, and the magnet piece is attracted to the connecting piece.

[0011] Preferably, the auxiliary mechanism further includes screws, which are threadedly connected to the front and rear sides of the right wall of the housing, and the screws penetrate the housing and are threadedly connected to the movable rod on the upper left side.

[0012] Preferably, the adjustment mechanism further includes a handle, which is fixedly connected to the front side of the support plate. A spring is provided on both the left and right sides of the outer wall of the handle. The front and rear ends of the spring abut against the support plate and the hollow plate, respectively. The front side of the handle passes through the hollow plate.

[0013] Preferably, the adjustment mechanism further includes multiple scale markings, which are respectively disposed on the outer side of the corresponding movable rod.

[0014] Preferably, the fixing mechanism further includes multiple support seats, which are respectively disposed at the upper and lower ends of the outer side of the movable plate, and a strap is fixedly connected to the outer side of the right support seat.

[0015] Preferably, the front left end of the strap is fixedly connected to a Velcro loop, and the front right end of the strap is fixedly connected to a Velcro hook.

[0016] This invention provides an orthopedic knee joint fixation and auxiliary training device. It has the following beneficial effects: 1. This invention uses a servo motor and a reducer to drive the rotating shaft, which in turn drives the fixed plate two to rotate via a movable rod. This provides high-torque, low-speed passive assisted training for patients in the early stages of rehabilitation. The reducer achieves self-locking fixation. When the patient enters the later stages of rehabilitation and needs active training, the connecting piece is pulled out, causing it to disengage from the square groove and recess, thus disconnecting the motor drive. At this time, the patient actively flexes their leg, causing the fixed plate two to rotate. This causes the damping rod to compress or stretch via a connecting rod, providing flexible resistance. This allows for a convenient switch from passive assisted training to active resistance training, improving the rehabilitation effect of the patient's spontaneous leg flexion training.

[0017] 2. This invention moves the support plate by pulling the handle forward and compressing the first spring, causing the support plate to disengage the wedge-shaped locking block from the slot on the movable rod. This releases the sliding limit on the first and second fixed plates, allowing them to slide freely on the outside of the movable rod to adjust their positions. Once adjusted to the appropriate length, the handle is released and reset and locked by the first spring. This allows for flexible adjustment of the device size according to the leg length of different patients, improving the device's applicability to patients of different body types.

[0018] 3. This invention features arc-shaped plates on the inner sides of fixed plates one and two. The connection seat and ball head allow the arc-shaped plates to rotate at multiple angles to conform to the contours of the patient's leg. Simultaneously, the movable column is compressed within the hollow column by the extension and retraction structure of the spring two, enabling the arc-shaped plates to provide slight buffering and adaptive adjustment when in contact with the leg. Furthermore, the tightening and fixing with the straps and the hook and loop surfaces of the Velcro not only ensures the device's secure fixation but also avoids compression and damage to the patient's muscles caused by excessive localized hard contact pressure. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a partial structural breakdown diagram of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the image; Figure 4 This is a partial structural cross-sectional view of the present invention; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a partial structural cross-sectional view of the adjusting mechanism of the present invention; Figure 7 This is a partial structural exploded view of the adjustment mechanism of the present invention; Figure 8 This is a partial structural diagram of the fixing mechanism of the present invention; Figure 9 This is a partial structural cross-sectional view of the fixing mechanism of the present invention.

[0020] The components are as follows: 1. Fixed plate one; 2. Auxiliary mechanism; 21. Outer shell; 22. Servo motor; 23. Reducer; 24. Connecting rod; 25. Damping rod; 26. Square groove; 27. Connecting piece; 28. Groove; 29. ​​Magnet piece; 210. Screw; 3. Adjustment mechanism; 31. Hollow plate; 32. Support plate; 33. Wedge-shaped block; 34. Slot; 35. Handle; 36. Spring one; 37. Scale marking; 4. Fixed mechanism; 41. Hollow column; 42. Movable column; 43. Ball head; 44. Support ring; 45. Spring two; 46. Connecting seat; 47. Arc-shaped piece; 48. Support seat; 49. Strap; 410. Velcro surface; 411. Velcro hook surface; 412. Movable plate; 5. Fixed plate two; 6. Slide groove; 7. Movable rod; 8. Rotating shaft. 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.

[0022] Reference Figure 2 , Figure 3 and Figure 4 This invention provides an orthopedic knee joint fixation auxiliary training device, including a fixation plate 1 and a fixation plate 2. Slide grooves 6 are provided on the left and right ends of adjacent sides of the fixation plate 1 and the fixation plate 2. Movable rods 7 are slidably connected to the inner sides of multiple slide grooves 6. The bottom of the upper movable rod 7 is rotatably connected to a rotating shaft 8. The outer side of the rotating shaft 8 is rotatably connected to the lower movable rod 7. An auxiliary mechanism 2 is provided on the outer side of the fixation plate 1 and the fixation plate 2. An adjustment mechanism 3 is provided on adjacent sides of the fixation plate 1 and the fixation plate 2. A fixing mechanism 4 is provided on the rear side of the fixation plate 1 and the fixation plate 2. Auxiliary mechanism 2 includes a housing 21, which is located on the left wall of the upper left movable rod 7. A servo motor 22 is fixedly connected inside the housing 21, and a reducer 23 is fixedly connected to the output end of the servo motor 22. The left end of the left rotating shaft 8 passes through the housing 21 and is fixedly connected to the output end of the reducer 23. When the servo motor 22 starts, it can drive the left rotating shaft 8 to rotate through the reducer 23. A connecting rod 24 is rotatably connected to one end of the left and right sides of the first fixed plate 1 and the second fixed plate 5. The bottom end of the upper connecting rod 24 is rotatably connected to the lower connecting rod 24. A damping rod 25 is rotatably connected to the middle of the left and right sides of the first fixed plate 1 and the second fixed plate 5. The damping rod 25 is connected to the connecting rod 24. The rotating connection allows the damping rod 25 to extend or shorten via the connecting rod 24 when the patient's lower leg moves the fixation plate 25. The auxiliary mechanism 2 also includes a square groove 26, which is located at the right end of the left rotating shaft 8. A connecting piece 27 is engaged inside the square groove 26. A groove 28 is provided on the top right wall of the lower left movable rod 7, which engages with the connecting piece 27. When the rotating shaft 8 rotates, the lower movable rod 7 can be rotated via the connecting piece 27. The auxiliary mechanism 2 also includes a magnet 29, which is fixedly connected inside the groove 28. The magnet 29 attracts the connecting piece 27, preventing the connecting piece 27 from detaching. Specifically, when using the knee joint fixation auxiliary training device for rehabilitation, if passive training mode is required, the servo motor 22 is activated. The servo motor 22 operates and drives the reducer 23. The output of the reducer 23 drives the rotating shaft 8 to rotate. This process achieves high torque output and low speed control. The reducer 23 maintains a self-locking state when stopped. The rotation of the rotating shaft 8 drives the lower movable rod 7 to swing, thereby driving the fixation plate 25 to rotate synchronously, forcing the patient's lower leg to move around the knee joint axis, completing the passive assisted flexion and extension of the knee joint. When the patient's rehabilitation progresses to the later stage and they have active mobility, force is applied to the right to pull out the connecting piece 27, so that the connecting piece 27 overcomes the magnetic attraction of the magnet piece 29, thereby detaching from the square groove 26 and the concave groove. When the mechanical engagement position of groove 28 is reached, the power transmission between servo motor 22 and rotating shaft 8 is cut off. At this time, the lower movable rod 7 returns to a free rotation state. The patient actively exerts force to perform a leg flexion movement, which drives the fixed plate 25 and movable rod 7 to perform a circular motion around the rotating shaft 8. Since the upper and lower connecting rods 24 are hinged to each other, the position change of fixed plate 25 will cause the connecting rod 24 to change its angle. The connecting rod 24 then exerts a compression or tension effect on the damping rod 25. The damping characteristics of the damping rod 25 provide reverse resistance for the patient's active leg flexion movement, thereby enhancing the intensity of muscle training. After the training is completed, the connecting piece 27 is reset and inserted into the groove 28 and square groove 26 to relock the relative position of rotating shaft 8 and movable rod 7, restoring the fixed support for the knee joint.

[0023] Reference Figure 5 , Figure 6 and Figure 7 The adjusting mechanism 3 includes two hollow plates 31, which are fixedly connected to the front sides of fixed plate 1 and fixed plate 2, respectively. Support plates 32 are slidably connected to the inner sides of both hollow plates 31. Wedge-shaped blocks 33 are fixedly connected to the left and right ends of the rear walls of both support plates 32. The support plates 32 move the wedge-shaped blocks 33. Multiple slots 34 are equidistantly provided on the front sides of multiple movable rods 7. The outer sides of the multiple wedge-shaped blocks 33 pass through the corresponding fixed plates 1 and 2, respectively, and engage with the slots 34. When the support plates 32 move the wedge-shaped blocks 33, they release the connection between the fixed plates 1 and 2, respectively. The relative locking of plate 2 5 and movable rod 7, the adjustment mechanism 3 also includes a handle 35, which is fixedly connected to the front side of support plate 32. Spring 1 36 is provided on both the left and right sides of the outer wall of handle 35. The front and rear ends of spring 1 36 abut against support plate 32 and hollow plate 31 respectively. Spring 1 36 is used to push support plate 32 to reset. The front side of handle 35 passes through hollow plate 31. The adjustment mechanism 3 also includes multiple scale marks 37, which are respectively set on the outside of the corresponding movable rod 7. The scale marks 37 enable the operator to adjust the position of fixed plate 1 and fixed plate 2 5 more accurately. Specifically, when adapting the device size to patients of different heights, pull the handle 35 forward. The displacement of the handle 35 causes the support plate 32 to move forward. During this process, the spring 36 is compressed simultaneously. The displacement of the support plate 32 causes the wedge-shaped locking block 33 to disengage from the slot 34 on the surface of the movable rod 7, releasing the locking state of the fixed plate 1 and the fixed plate 2 5 relative to the movable rod 7. At this time, push or pull the fixed plate 1 or the fixed plate 2 5 along the axis of the movable rod 7, so that the fixed plate 1 or the fixed plate 2 5 slides on the outside of the movable rod 7, changing the distance between the fixed plate 1 and the fixed plate 2 5 and the overall length. After adjusting to the position suitable for the patient's leg length, release the handle 35. Under the rebound action of the spring 36, the wedge-shaped locking block 33 re-locks into the corresponding slot 34, completing the size adjustment of the device.

[0024] Reference Figure 1 , Figure 8 and Figure 9 The fixing mechanism 4 includes multiple movable plates 412, which are rotatably connected to the left and right rear ends of the fixing plate 1 and the fixing plate 2. The movable plates 412 can rotate to match the patient's leg. Multiple hollow columns 41 are fixedly connected to the inner sides of the fixing plate 1, the fixing plate 2, and the movable plates 412. Movable columns 42 are slidably connected to the inner side of the hollow columns 41. One end of the movable column 42 passes through the hollow column 41 and is fixedly connected to a ball head 43. A support ring 44 is fixedly connected to the outer side of the movable column 42. A spring 2 45 is provided on the front side of the support ring 44. The spring 2 45 can push the movable column 42 to reset through the support ring 44. A connecting seat 4 is rotatably connected to the outer side of the ball head 43. 6. An arc-shaped piece 47 is fixedly connected to the rear side of the connecting seat 46. The arc-shaped piece 47 is connected to the ball head 43 through the connecting seat 46, so that the arc-shaped piece 47 can be finely adjusted so that the arc-shaped piece 47 can fit the patient's leg. The fixing mechanism 4 also includes multiple support seats 48. The multiple support seats 48 are respectively set at the upper and lower ends of the outer side of the movable plate 412. A strap 49 is fixedly connected to the outer side of the right support seat 48. A Velcro surface 410 is fixedly connected to the front left end of the strap 49, and a Velcro hook surface 411 is fixedly connected to the front right end of the strap 49. The strap 49 passes around the left support seat 48, and the device can be fixed by sticking the Velcro hook surface 411 to the Velcro surface 410. Specifically, when installing and fixing the knee joint fixation auxiliary training device onto the patient's leg, the movable plates 412 on both sides of the fixation mechanism 4 are pried open outwards, and the fixation plate 1 and fixation plate 2 5 are respectively placed against the patient's thigh and calf. At this time, the inner arc-shaped piece 47 contacts the patient's leg skin. Since the connecting seat 46 on the rear side of the arc-shaped piece 47 is connected to the movable column 42 through the ball head 43, the connecting seat 46 can be rotated and adjusted around the ball head 43 at multiple angles. At the same time, the movable column 42 is elastically supported inside the hollow column 41 by the spring 2 45 and the support ring 44. It can stretch and buffer along the axial direction. When the arc-shaped piece 47 is compressed, it automatically adapts to the muscle contour of the patient's leg and fits tightly through the combined action of rotation and stretching. Then, the strap 49 is passed through the support seat 48 on the left side and pulled tight. The hook and loop face 411 at the end of the strap 49 is pressed and pasted onto the hook and loop face 410. Through the wrapping and tightening force of the strap 49 and the adaptive fitting structure of the arc-shaped piece 47, the device is firmly locked to the affected limb. The arc-shaped piece 47 is used to disperse the contact pressure and avoid soft tissue injury to the patient due to excessive force at a single point.

[0025] Reference Figure 1 , Figure 2 and Figure 3 The auxiliary mechanism 2 also includes screws 210, which are threaded to the front and rear sides of the right wall of the housing 21. The screws 210 penetrate the housing 21 and are threaded to the upper left movable rod 7. Specifically, when it is necessary to disassemble and maintain the servo motor 22 and the reducer 23, the housing 21 can be removed by unscrewing multiple screws 210, making it convenient to maintain the servo motor 22 and the reducer 23.

[0026] Working principle: During the use of the knee joint fixation assistive training device, when training is required, the servo motor 22 is activated. The servo motor 22 drives the rotating shaft 8 to rotate via the reducer 23, thereby increasing the output torque of the servo motor 22 and reducing its speed. The reducer 23 also provides self-locking. When the rotating shaft 8 rotates, it drives the fixing plate 25 to rotate via the lower movable rod 7, thereby driving the patient's lower leg to rotate and providing assisted training for the patient's knee joint. In the later stages of rehabilitation, when the patient's knee joint can bend, the connecting piece 27 is pulled out to the right. At this time, the connecting piece 27 will overcome the attraction force of the magnetic piece 29 and thus detach from the square groove 26 and the concave groove. With the slot 28 engaged, the lower movable rod 7 can rotate freely. When the patient flexes their leg, it will cause the fixing plate 25 and the movable rod 7 to rotate around the pivot 8. At this time, the fixing plate 25 will perform circular motion. Since the upper connecting rod 24 is connected to the lower connecting rod 24, the movement of the fixing plate 25 will drive the upper and lower connecting rods 24 to move. When the connecting rod 24 moves, it compresses or stretches the damping rod 25. The damping rod 25 provides resistance for the patient's leg flexion training, thereby improving the effect of the patient's spontaneous leg flexion training. After the training is completed, the connecting piece 27 is reinserted into the groove 28 and the inside of the square groove 26, thereby providing fixation for the patient's knee joint. Furthermore, when different patients have different leg lengths and need to adjust the fixed auxiliary training device, pulling the handle 35 forward will cause the support plate 32 to move forward and compress the spring 36. When the support plate 32 moves, it will cause the wedge-shaped block 33 to move forward, causing the wedge-shaped block 33 to disengage from the slot 34, thereby releasing the sliding limit of the fixed plate 1 and the fixed plate 2 5 on the outside of the movable rod 7. At this time, pulling the fixed plate 1 or the fixed plate 2 5 will cause the fixed plate 1 and the fixed plate 2 5 to slide on the outside of the movable rod 7. By moving the fixed plate 1 and the fixed plate 2 5, the fixed auxiliary training device can be used by patients of different body sizes. Finally, when it is necessary to fix the fixed auxiliary training device to the patient's leg, first pry open the movable plates 412 on both sides, and place the first fixed plate 1 and the second fixed plate 5 against the patient's leg. At this time, the inner arc-shaped piece 47 will fit against the patient's leg, and the connecting seat 46 on the back of the arc-shaped piece 47 can rotate around the ball head 43. The movable column 42 on the back of the ball head 43 can perform slight extension and contraction under the action of the second spring 45 and the support ring 44, so that the arc-shaped piece 47 can rotate to a certain extent and fit against the patient's leg. Then, insert the strap 49 into the left support seat 48 and tighten it. Then, stick the hook side 411 of the Velcro onto the loop side 410 of the Velcro. The device can be easily fixed to the patient's leg by the strap 49, and the arc-shaped piece 47 allows the device to fit against the patient's leg muscles, so as not to cause damage to the patient's leg due to excessive local pressure.

[0027] 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 orthopedic knee joint fixation auxiliary training device, comprising a fixed plate one (1) and a fixed plate two (5), characterized in that, Slide grooves (6) are provided on the left and right ends of adjacent sides of the first fixed plate (1) and the second fixed plate (5). Movable rods (7) are slidably connected to the inner sides of multiple slide grooves (6). A rotating shaft (8) is rotatably connected to the bottom of the upper movable rod (7). The outer side of the rotating shaft (8) is rotatably connected to the lower movable rod (7). An auxiliary mechanism (2) is provided on the outer side of the first fixed plate (1) and the second fixed plate (5). An adjustment mechanism (3) is provided on adjacent sides of the first fixed plate (1) and the second fixed plate (5). A fixing mechanism (4) is provided on the rear side of the first fixed plate (1) and the second fixed plate (5). The auxiliary mechanism (2) includes a housing (21), which is located on the left wall of the upper left movable rod (7). A servo motor (22) is fixedly connected inside the housing (21). A reducer (23) is fixedly connected to the output end of the servo motor (22). The left end of the left rotating shaft (8) passes through the housing (21) and is fixedly connected to the output end of the reducer (23). A connecting rod (24) is rotatably connected to one end of the left and right sides of the first fixed plate (1) and the second fixed plate (5). The bottom end of the upper connecting rod (24) is rotatably connected to the lower connecting rod (24). A damping rod (25) is rotatably connected to the middle of the left and right sides of the first fixed plate (1) and the second fixed plate (5). The damping rod (25) is rotatably connected to the connecting rod (24).

2. The orthopedic knee joint fixation auxiliary training device according to claim 1, characterized in that, The adjustment mechanism (3) includes two hollow plates (31), which are fixedly connected to the front sides of the first fixed plate (1) and the second fixed plate (5), respectively. The inner sides of the two hollow plates (31) are slidably connected to the support plates (32), and the left and right ends of the rear walls of the two support plates (32) are fixedly connected to the wedge-shaped blocks (33). The front sides of the multiple movable rods (7) are provided with multiple slots (34) at equal intervals. The outer sides of the multiple wedge-shaped blocks (33) pass through the corresponding first fixed plate (1) and second fixed plate (5) and engage with the slots (34).

3. The orthopedic knee joint fixation auxiliary training device according to claim 1, characterized in that, The fixing mechanism (4) includes multiple movable plates (412), which are rotatably connected to the left and right rear ends of the fixed plate one (1) and the fixed plate two (5). Multiple hollow columns (41) are fixedly connected to the inner sides of the fixed plate one (1), the fixed plate two (5) and the movable plate (412). A movable column (42) is slidably connected to the inner side of the hollow column (41). One end of the movable column (42) passes through the hollow column (41) and is fixedly connected to a ball head (43). A support ring (44) is fixedly connected to the outer side of the movable column (42). A spring two (45) is provided on the front side of the support ring (44). A connecting seat (46) is rotatably connected to the outer side of the ball head (43). An arc-shaped piece (47) is fixedly connected to the rear side of the connecting seat (46).

4. The orthopedic knee joint fixation auxiliary training device according to claim 1, characterized in that, The auxiliary mechanism (2) also includes a square groove (26), which is located at the right end of the left rotating shaft (8). A connecting piece (27) is engaged inside the square groove (26), and a groove (28) is provided on the top of the right wall of the lower left movable rod (7). The groove (28) engages with the connecting piece (27).

5. The orthopedic knee fixation training aid of claim 4, wherein, The auxiliary mechanism (2) also includes a magnet (29), which is fixedly connected to the inner side of the groove (28) and is attracted to the connecting piece (27).

6. The orthopedic knee fixation training aid of claim 1, wherein, The auxiliary mechanism (2) also includes a screw (210), which is threaded to the front and rear sides of the right wall of the housing (21). The screw (210) passes through the housing (21) and is threaded to the movable rod (7) on the upper left side.

7. The orthopedic knee fixation training aid of claim 2, wherein, The adjustment mechanism (3) also includes a handle (35), which is fixedly connected to the front side of the support plate (32). The handle (35) is provided with springs (36) on both the left and right sides of the outer wall of the handle (35). The front and rear ends of the springs (36) abut against the support plate (32) and the hollow plate (31) respectively. The front side of the handle (35) passes through the hollow plate (31).

8. The orthopedic knee fixation training aid of claim 2, wherein, The adjustment mechanism (3) also includes multiple scale markings (37), which are respectively set on the outside of the corresponding movable rod (7).

9. The orthopedic knee joint fixation auxiliary training device according to claim 3, characterized in that, The fixing mechanism (4) also includes multiple support seats (48), which are respectively arranged at the upper and lower ends of the outer side of the movable plate (412), and the outer side of the right support seat (48) is fixedly connected with a strap (49).

10. The orthopedic knee fixation training aid of claim 9, wherein, The front left end of the strap (49) is fixedly connected to a Velcro surface (410), and the front right end of the strap (49) is fixedly connected to a Velcro hook surface (411).

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