Lower limb fixing device for knee joint replacement surgery in orthopedics department

Abstract

The invention provides a lower limb fixing device for knee replacement surgery in the orthopedics department and belongs to the technical field of medical equipment. Comprising a bottom box, a fixing assembly used for fixing the legs of a patient is installed at the top of the bottom box, the fixing assembly comprises two first thigh plates, two first shank plates and two foot boxes which are symmetrically arranged at the top of the bottom box, and a second thigh plate is slidably clamped in one end of each first thigh plate. Through cooperation of the fixing assembly, the adjusting assembly and the positioning assembly, it can be ensured that the leg position of a patient is accurate and stable in an operation, the stretching assembly can promote recovery of knee joints after the operation, the postoperative rehabilitation effect of the patient is overall improved, and meanwhile the stretching assembly is additionally arranged, so that the postoperative rehabilitation effect of the patient is improved. The postoperative knee joint recovery process of a patient is more scientific and efficient, the overall recovery effect is optimized by reducing unhealthy symptoms such as muscle stiffness of the whole body, and the defect that traditional postoperative recovery only depends on drugs and passive methods is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a lower limb fixation device for orthopedic knee replacement surgery. Background Art

[0002] In orthopedic surgeries, especially during knee replacement surgeries, the stable fixation of the patient's lower limb is one of the key factors to ensure the smooth progress of the surgery. During the surgery, doctors need to perform operations such as cutting, replacing, and suturing the knee joint under a clear vision and a stable operation platform.

[0003] In the prior art, a lower limb fixation device for orthopedic knee replacement surgery is proposed in the Chinese patent document with the publication number CN114404209B, which includes a rectangular block. A height adjustment mechanism is provided at the bottom of the rectangular block. A placement groove is opened at the top of the rectangular block. A first placement plate is rotatably connected to the groove wall of the placement groove. The end of the first placement plate is hinged to a second placement plate. The first placement plate and the second placement plate are distributed at an obtuse angle. A pair of restraint straps are fixedly connected to the top edges of both the first placement plate and the second placement plate symmetrically. At the top of the end of the second placement plate away from the first placement plate, a first arc-shaped splint is symmetrically hinged; although this technology facilitates medical staff to perform replacement surgery on the patient's knee joint, there are some defects in its actual use: this technology fixes the patient's leg through two placement plates during the surgery. Since the structure of the placement plate is relatively flat, it is difficult for the placement plate to closely fit the leg, resulting in the problem that the leg is prone to dislocation when bending the patient's leg. Therefore, it is necessary for medical staff to make secondary adjustments, which causes inconvenience in use. In addition, this technology only fixes the leg, and the foot is not effectively fixed. When bending and placing the patient's leg, since the rectangular block provided by this technology is prone to cause the patient's foot to get stuck when the leg is bent and then flattened, it will cause problems of foot injury to the patient. At the same time, although this technology is provided with a leg massage device after the surgery to assist in recovery, during the postoperative rehabilitation training of the patient, especially during the active leg flexion and extension training, only relying on the electric device to achieve leg bending lacks the movement stimulation of other limbs. Prolonged use will cause problems such as insufficient activity and muscle stiffness in other parts of the patient's body. Therefore, it is not conducive to the overall rehabilitation of the patient's body. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a lower limb fixation device for orthopedic knee replacement surgery to solve the problems of unreliable leg fixation, ineffective foot fixation, and lack of whole-body movement stimulation in postoperative rehabilitation training in the existing fixation devices.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] Lower limb fixing device for orthopedic knee replacement surgery, including a bottom box. A fixing component for fixing the patient's leg is installed on the top of the bottom box. The fixing component includes two first thigh plates, two first calf plates and two foot boxes symmetrically arranged on the top of the bottom box. A second thigh plate is slidably clamped inside one end of the first thigh plate. The other end of the second thigh plate is rotatably connected to a side plate through a shaft. The other end of the side plate is rotatably connected to a second calf plate through a shaft. The other end of the second calf plate is slidably clamped inside one end of the first calf plate. The other end of the first calf plate is rotatably connected to a foot box through a shaft. Straps are respectively installed on the tops of the first thigh plate, the second thigh plate, the first calf plate and the second calf plate. Thigh cloths are respectively installed on the bottoms of the first thigh plate and the second thigh plate. Calf cloths are respectively installed on the bottoms of the first calf plate and the second calf plate. An adjusting component for adjusting the knee flexion angle of the patient's leg during the operation is arranged inside the bottom box. The adjusting component is used in cooperation with the fixing component. A positioning component for positioning any position of the adjusting component during the operation is arranged inside the bottom box. The positioning component is used in cooperation with the adjusting component. A stretching component for the patient to perform knee joint exercises after the operation is arranged outside the bottom box. The stretching component cooperates with the adjusting component, can be used for assisting the operation during the operation, and can be used for the patient's rehabilitation exercise after the operation.

[0007] Optionally, the outer shape of the foot box is L-shaped, the outer shapes of the thigh cloth and the calf cloth are U-shaped. Two connecting plates are symmetrically and fixedly connected to one end of the bottom box. An L-shaped plate is slidably clamped inside the other end of the connecting plate. The two ends of the L-shaped plate away from the connecting plate are respectively rotatably connected to one end of the first thigh plate through a shaft. A plurality of adjusting holes are respectively opened on one side of the connecting plate, the first thigh plate and the first calf plate. Adjusting bolts are respectively installed inside one side of one end of the second thigh plate, the second calf plate and the L-shaped plate through spring pieces. One ends of the plurality of adjusting bolts respectively away from the spring pieces penetrate through the side walls of the second thigh plate, the second calf plate and the L-shaped plate and are connected to the inside of the adjusting holes. A positioning plate is fixedly connected to one side of the shaft connecting the foot box and the first calf plate. Limiting blocks are respectively fixedly connected to both sides inside one end of the first calf plate. The positions of the limiting blocks correspond to the positions of the positioning plate.

[0008] Optionally, a U-shaped frame is rotatably connected to the outside of the shaft connecting the first calf plate and the foot box. An adjusting box is slidably connected to the top of the bottom box. A moving groove is opened on the top of the adjusting box. The middle part of the bottom of the U-shaped frame is slidably clamped inside the moving groove. A plurality of jacks are respectively opened on both sides of the adjusting box. A plug rod is slidably connected to the inside of the jack. One end of the plug rod penetrates through one side of the adjusting box and the inside of the bottom of the U-shaped frame and is connected to the jack on the other side of the adjusting box.

[0009] Optionally, the adjusting assembly includes a first rack fixedly connected to the inner bottom of the bottom box. A first gear is meshed and connected to the top of the first rack. A fixed shaft is rotatably clamped inside the middle of the first gear. U-shaped plates are fixedly connected to the tops of both ends of the fixed shaft. A slider is fixedly connected to the top of the U-shaped plate. A first chute is opened at the top of the bottom box. The top of the slider penetrates through the inside of the first chute and is fixedly connected to the bottom of the adjusting box.

[0010] Optionally, the positioning assembly includes a positioning rod slidably clamped inside the fixed shaft. A first spring is sleeved outside the positioning rod. One end of the first spring is fixedly connected to the inside of one end of the fixed shaft. The other end of the first spring is fixedly connected to the outside of one end of the positioning rod. A plurality of positioning holes are opened on the inner wall of the bottom box. The positions of the plurality of positioning holes correspond to the position of the positioning rod. When one end of the positioning rod is inserted into the inside of the positioning hole, the first spring is in a rebounding state and the position of the first gear is fixed.

[0011] Optionally, a limiting plate is fixedly connected to the top of the end of the positioning rod away from the positioning hole. A U-shaped block is fixedly connected to one side of the U-shaped plate. An L-shaped block and a connecting rod are slidably connected inside the U-shaped block. The top of the L-shaped block penetrates through the inside of the U-shaped block and is fixedly connected to the top of the connecting rod. The position of the bottom of the L-shaped block corresponds to the position of the top of the limiting plate. Inclined angles are respectively opened on the mutually corresponding sides of the limiting plate and the L-shaped block.

[0012] Optionally, a track plate is fixedly connected to one side of the bottom of the end of the U-shaped block away from the U-shaped plate. A pulley is rotatably connected to the bottom of the track plate. A foot rope is fixedly connected to the end of the positioning rod away from the positioning hole. A third chute is opened at the bottom of one side of the bottom box. The end of the foot rope away from the pulley passes through the outside of the pulley and the inside of the third chute and is placed outside the bottom box. The end of the foot rope away from the positioning rod is circular.

[0013] Optionally, a trapezoidal block is slidably clamped on the top of the track plate. A second spring is sleeved outside the connecting rod. One end of the second spring is fixedly connected to the outside of one end of the connecting rod. The other end of the second spring is fixedly connected to the bottom of the U-shaped block. A connecting block is rotatably connected to the bottom of the connecting rod. The bottom of the connecting block is in contact with the inclined side of the top of the trapezoidal block. A release bolt is fixedly connected to the other side of the trapezoidal block. A third spring is sleeved outside one end of the release bolt. One end of the third spring is fixedly connected to one side of the trapezoidal block. The other end of the third spring is fixedly connected to one side of the bottom of the U-shaped block. A second chute is opened at the top of one side of the bottom box. The end of the release bolt away from the trapezoidal block respectively penetrates through the bottom of the U-shaped block and the inside of the second chute.

[0014] Optionally, the stretching component includes a third rack and a second rack that are symmetrically arranged and slidably clamped to the inner bottom of the bottom box. A second gear is rotatably connected to the inner bottom of the bottom box. The two sides of the second gear are respectively meshed with one side of the third rack and the second rack. The top of one end of the second rack is fixedly connected with an L-shaped rod. An annular groove is formed on one side of the first gear. The end of the L-shaped rod away from the second rack is slidably clamped to the inside of the annular groove. The top of one end of the third rack is fixedly connected with a connecting plate. A fifth chute and a fourth chute are formed on one side of the bottom box. One side of the top of the connecting plate is fixedly connected with a sliding plate. One end of the sliding plate passes through the inside of the fifth chute and is rotatably connected with a foot rod through a shaft. A U-shaped clamp is slidably clamped to one side of the fourth chute. U-shaped elastic pieces are symmetrically arranged inside the U-shaped clamp. The end of the foot rod away from the sliding plate is clamped between the two elastic pieces. When the second thigh plate and the second calf plate are parallel, the position of the foot rod is located on one side of the bottom box away from the foot box.

[0015] Optionally, placing boxes are fixedly connected to the bottoms of both ends of the U-shaped frame. A hand rope is placed inside the two placing boxes. One end of the hand rope is fixedly connected to the inside of the placing box. The outer shape of the end of the hand rope away from the placing box is circular, and the length of the hand rope is greater than the length between the first thigh plate and the first calf plate, and the distance between the two placing boxes is greater than the distance between the two first thigh plates.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, through the cooperation of the fixing component, the adjusting component and the positioning component, the leg position of the patient during the operation can be ensured to be accurate and stable, while the stretching component can promote the recovery of the knee joint after the operation, overall improving the postoperative rehabilitation effect of the patient. At the same time, the addition of the stretching component not only ensures that the knee joint recovery process of the patient after the operation is more scientific and efficient, but also optimizes the overall rehabilitation effect by reducing adverse symptoms such as whole body muscle stiffness, avoiding the disadvantages of only relying on drugs and passive methods in traditional postoperative recovery.

[0018] By setting the fixing component, including components such as the first thigh plate, the second thigh plate, the first calf plate, the second calf plate and the L-shaped foot box, and designing in combination with the human leg through the belt-shaped binding strap and the U-shaped cloth surface structure, the stability of the patient's leg during the operation is ensured. At the same time, when fixing the leg, the fixation of the foot is added, which is convenient for adjusting the patient's leg during the operation and also avoids the problem of foot injury caused by the lack of foot fixation when moving the leg. At the same time, through multiple adjustable sliding and rotating connections, it can adapt to the leg shapes of different patients, enhancing the versatility and comfort of the device.

[0019] By setting the adjustment component, through the meshing of the first rack and the first gear, combined with the cooperation of the slider and the chute, the patient's leg can be accurately adjusted to the required knee-flexion angle, ensuring the accuracy of the posture during the operation, reducing intraoperative problems caused by uncomfortable angles. At the same time, the adjustment component can not only assist in adjusting the position of the patient's leg during the operation, but also provide additional convenience for the doctor, ensuring that the operation is carried out at the optimal operation angle.

[0020] By setting the positioning component, through the cooperation of the positioning rod and the spring, the adjustment component can be accurately positioned at the required position, ensuring that each adjustment can be accurately in place, thus guaranteeing the accuracy during the operation. At the same time, it can also ensure that the adjustment component remains stable during the operation and will not be affected by external interference or movement, thereby improving the safety of the patient. During the use process, by pulling the positioning rod with the foot rope, the limiting plate is urged to resist against one side of the bottom of the L-shaped block, thereby unlocking the position of the first gear, and then facilitating the adjustment of the leg position. At the same time, when the position is located, by pressing the unlocking bolt, the connecting rod drives the L-shaped block to rise. At this time, the positioning rod automatically rebounds through the first spring, and one end of the positioning rod is again inserted into the corresponding positioning hole, thereby fixing the position of the leg, which is convenient for the medical staff to use during the operation.

[0021] By setting the stretching component, the patient can perform stretching and exercise of the knee joint after the operation, helping to accelerate the recovery process. In cooperation with the adjustment component, the patient's leg can be appropriately stretched and moved at different positions, promoting the recovery of joint mobility. At the same time, through the set foot rod and hand rope, the other leg and the arm are used to drive the operated leg for training, thereby promoting the blood circulation of the patient's whole body, guiding the patient to carry out beneficial rehabilitation exercises, and avoiding problems such as muscle atrophy and limited activity caused by long-term bed rest. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0023] Figure 1 It is a schematic three-dimensional overall structure diagram during the operation of the present invention;

[0024] Figure 2 For the present invention Figure 1 The enlarged structure diagram at A in it;

[0025] Figure 3 It is a schematic three-dimensional overall structure diagram of the rehabilitation training after the operation of the present invention;

[0026] Figure 4 For the present invention Figure 3 The enlarged structure diagram at B in it;

[0027] Figure 5 This is a schematic diagram of a partial structure of the fixing component of the present invention;

[0028] Figure 6 This is a schematic diagram of a partial structure inside the bottom box of the present invention;

[0029] Figure 7 This is a schematic diagram of a side - view sectional structure of the bottom box of the present invention;

[0030] Figure 8 This is a schematic diagram of a partial structure inside the bottom box of the present invention;

[0031] Figure 9 This is a schematic diagram of a partial structure of the adjusting component and the positioning component of the present invention;

[0032] Figure 10 This is a schematic diagram of a sectional structure at the connection between the foot box and the first calf plate of the present invention.

[0033] [Reference Signs]

[0034] 1. Bottom box; 2. First thigh plate; 3. Second thigh plate; 4. Side plate; 5. First calf plate; 6. Second calf plate; 7. Foot box; 8. Thigh cloth; 9. Calf cloth; 10. Strap; 11. Connecting plate; 12. L - shaped plate; 13. U - shaped frame; 14. Placing box; 15. Adjusting box; 16. Insertion hole; 17. Insertion rod; 18. First chute; 19. Hand rope; 20. Slide block; 21. U - shaped plate; 22. First gear; 23. U - shaped block; 24. Fixed shaft; 25. First spring; 26. Positioning rod; 27. Positioning hole; 28. Limiting plate; 29. L - shaped block; 30. Connecting rod; 31. Second spring; 32. Connecting block; 33. Trapezoidal block; 34. Third spring; 35. Track plate; 36. Pulley; 37. Annular groove; 38. L - shaped rod; 39. First rack; 40. Second gear; 41. Second rack; 42. Third rack; 43. Connecting plate; 44. Second chute; 45. Third chute; 46. Foot rope; 47. Fourth chute; 48. Fifth chute; 49. Slide plate; 50. U - shaped clamp; 51. Elastic piece; 52. Foot rod; 53. Alignment plate; 54. Limiting block; 55. Adjusting bolt; 56. Adjusting hole; 57. Release bolt.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed Embodiments

[0036] The following will describe in detail the lower limb fixation device for orthopedic knee replacement surgery provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0037] As Figures 1 to 10 shown, the embodiment of the present invention provides a lower limb fixation device for orthopedic knee replacement surgery, including a bottom box 1. A fixation component for fixing the patient's leg is installed on the top of the bottom box 1. The fixation component includes two first thigh plates 2, two first calf plates 5, and two foot boxes 7 that are symmetrically arranged on the top of the bottom box 1. A second thigh plate 3 is slidably clamped inside one end of the first thigh plate 2. The other end of the second thigh plate 3 is rotatably connected to a side plate 4 through a shaft. The other end of the side plate 4 is rotatably connected to a second calf plate 6 through a shaft. The other end of the second calf plate 6 is slidably clamped inside one end of the first calf plate 5. The other end of the first calf plate 5 is rotatably connected to a foot box 7 through a shaft. Straps 10 are respectively installed on the tops of the first thigh plate 2, the second thigh plate 3, the first calf plate 5, and the second calf plate 6. Thigh cloths 8 are respectively installed on the bottoms of the first thigh plate 2 and the second thigh plate 3. Calf cloths 9 are respectively installed on the bottoms of the first calf plate 5 and the second calf plate 6. An adjustment component for adjusting the knee flexion angle of the patient's leg during the operation is arranged inside the bottom box 1. The adjustment component is used in cooperation with the fixation component. A positioning component for positioning any position of the adjustment component during the operation is arranged inside the bottom box 1. The positioning component is used in cooperation with the adjustment component. A stretching component for the patient to perform knee joint exercises after the operation is arranged outside the bottom box 1. The stretching component cooperates with the adjustment component, can be used for assisting operations during the operation, and is used for the patient's rehabilitation exercise after the operation;

[0038] Through the cooperation of the set fixation component, adjustment component, and positioning component, it can ensure the accurate and stable position of the patient's leg during the operation, while the stretching component can promote the recovery of the knee joint after the operation, overall improving the postoperative rehabilitation effect of the patient. At the same time, the addition of the stretching component not only ensures that the knee joint recovery process of the patient after the operation is more scientific and efficient, but also optimizes the overall rehabilitation effect by reducing adverse symptoms such as whole body muscle stiffness, avoiding the drawbacks of only relying on drugs and passive methods in traditional postoperative recovery.

[0039] As Figures 1 to 5As shown, the outer shape of the foot box 7 is L-shaped, the outer shapes of the thigh cloth 8 and the calf cloth 9 are U-shaped. One end of the bottom box 1 is symmetrically fixedly connected with two connecting plates 11. The inner part of the other end of the connecting plate 11 is slidably clamped with an L-shaped plate 12. One ends of the two L-shaped plates 12 away from the connecting plate 11 are respectively rotationally connected with one end of the first thigh plate 2 through a shaft;

[0040] Through the set fixing components, including components such as the first thigh plate 2, the second thigh plate 3, the first calf plate 5, the second calf plate 6 and the L-shaped foot box 7, through the strip-shaped binding straps 10 and the U-shaped cloth surface structure, it is designed in combination with the human leg to ensure the stability of the patient's leg during the operation. At the same time, when fixing the leg, the fixation of the foot is added, which is convenient for adjusting the patient's leg during the operation. At the same time, it also avoids the problem of foot injury caused by the lack of foot fixation when moving the leg. When in use, first place the patient's thigh on the top of the thigh cloth 8 and be clamped between the two first thigh plates 2 and the two second thigh plates 3. At this time, the patient's foot will be placed on the top of the L-shaped foot box 7, automatically adapting to the human foot. At this time, the patient's calf will be placed on the top of the calf cloth 9 and be clamped between the two second calf plates 6 and the two first calf plates 5. Then fix it through the binding strap 10. At this time, through the set side plate 4, the largest space at the knee of the leg is exposed outside, which is convenient for the operation of medical staff.

[0041] As Figures 1 to 6 As shown, a plurality of adjustment holes 56 are respectively opened on one side of the connecting plate 11, the first thigh plate 2 and the first calf plate 5. Adjustment bolts 55 are respectively installed inside one side of one end of the second thigh plate 3, the second calf plate 6 and the L-shaped plate 12 through spring pieces. One ends of the plurality of adjustment bolts 55 away from the spring pieces respectively penetrate the side walls of the second thigh plate 3, the second calf plate 6 and the L-shaped plate 12 and are connected with the inside of the adjustment holes 56. One side of the shaft connecting the foot box 7 and the first calf plate 5 is fixedly connected with an alignment plate 53. On both sides of the inside of one end of the first calf plate 5, limit blocks 54 are respectively fixedly connected. The position of the limit block 54 corresponds to the position of the alignment plate 53. A U-shaped frame 13 is rotationally connected to the outside of the shaft connecting the first calf plate 5 and the foot box 7. An adjustment box 15 is slidably connected to the top of the bottom box 1. A moving groove is opened on the top of the adjustment box 15. The inside of the moving groove is slidably clamped with the middle part of the bottom of the U-shaped frame 13. A plurality of jacks 16 are respectively opened on both sides of the adjustment box 15. A plug rod 17 is slidably connected inside the jack 16. One end of the plug rod 17 penetrates one side of the adjustment box 15 and the inside of the bottom of the U-shaped frame 13 and is connected with the jack 16 on the other side of the adjustment box 15;

[0042] Through the provided adjusting bolt 55 and adjusting holes 56, it is designed by imitating the "umbrella rib pull rod" and the "lifting shed support", enabling the fixing component to be adapted to the legs of different patients. During adjustment, first use the adjusting component to adjust the first thigh plate 2 and the first calf plate 5 to a parallel state. At this time, press the adjusting bolt 55, and due to the action of the spring piece, it moves to the side away from the adjusting hole 56. Then, pull out the insertion rod 17 from the inside of the insertion hole 16. After that, pull the first calf plate 5 and the first thigh plate 2, causing the second thigh plate 3, the second calf plate 6, and the L-shaped plate 12 to elongate. Furthermore, it makes the adjusting bolt 55 move and the spring piece rebound into the next adjusting hole 56. At the same time, insert the insertion rod 17 through the bottom of the U-shaped frame 13 and into the insertion hole 16 for positioning, thus making the overall leg plate and the L-shaped plate 12 grow, facilitating the use by patients with longer legs. Moreover, it enables the patient's leg knee joint to always be between the two side plates 4, which is convenient for the medical staff during the operation. It should be noted here that the number and spacing of the insertion holes 16 are adapted to the number and spacing of the adjusting holes 56 to avoid inaccurate positioning during adjustment. At the same time, through the provided limit block 54 and alignment plate 53, as Figure 10 shown, it limits the rotation angle of the foot box 7, preventing the foot box 7 from rotating too much and causing sprain problems. At the same time, it makes the rotation angle of the foot box 7 limited to the angle adapted to the bending of the patient's leg, which not only avoids foot injuries but also provides a certain degree of comfort for the patient's foot.

[0043] As Figures 1 to 9 shown, the adjusting component includes a first rack 39 fixedly connected to the inner bottom of the bottom box 1. The top of the first rack 39 is meshed with a first gear 22. A fixed shaft 24 is rotationally clamped inside the middle of the first gear 22. At the top of both ends of the fixed shaft 24, U-shaped plates 21 are fixedly connected. The top of the U-shaped plates 21 is fixedly connected with sliders 20. A first sliding groove 18 is opened at the top of the bottom box 1. The top of the slider 20 penetrates through the inside of the first sliding groove 18 and is fixedly connected with the bottom of the adjusting box 15;

[0044] Through the provided adjusting component, through the meshing of the first rack 39 and the first gear 22, combined with the cooperation of the slider 20 and the sliding groove, the patient's leg can be accurately adjusted to the required knee bending angle, ensuring the accuracy of the posture during the operation and reducing intraoperative problems caused by uncomfortable angles. At the same time, the adjusting component can not only assist in adjusting the position of the patient's leg during the operation but also provide additional convenience for the doctor, ensuring that the operation is carried out at the best operation angle. When in use, by pushing the patient's calf, the bottom of the adjusting box 15 drives the first gear 22 to roll on the top of the first rack 39 through the slider 20 and the U-shaped plate 21. At this time, since the position of the first thigh plate 2 is fixed and can only perform rotational movement, it causes the calf and the thigh to form a bend, facilitating the medical staff to operate on the patient's knee joint.

[0045] As shown in Figures 6 to 9 the figure, the positioning assembly includes a positioning rod 26 that is slidably clamped inside the fixed shaft 24. A first spring 25 is sleeved outside the positioning rod 26. One end of the first spring 25 is fixedly connected to the inside of one end of the fixed shaft 24, and the other end of the first spring 25 is fixedly connected to the outside of one end of the positioning rod 26. A plurality of positioning holes 27 are formed in the inner wall of the bottom box 1, and the positions of the plurality of positioning holes 27 correspond to the position of the positioning rod 26. When one end of the positioning rod 26 is inserted into the inside of the positioning hole 27, the first spring 25 is in a rebounding state and the position of the first gear 22 is fixed;

[0046] By means of the provided positioning assembly, through the cooperation of the positioning rod 26 and the spring, the adjusting assembly can be accurately positioned at the required position, ensuring that each adjustment can be accurately in place, thereby guaranteeing the accuracy during the operation. At the same time, it can also ensure that the adjusting assembly remains stable during the operation and will not be affected by external force interference or movement, thus improving the safety of the patient. When in use, the first spring 25 is in a rebounding state, prompting one end of the positioning rod 26 to be inserted into the positioning hole 27 at the corresponding position, and further prompting the position of the first gear 22 to be fixed, so that the position of the calf bracket is fixed, which is convenient for the operation of medical staff. At the same time, through the provided fixed shaft 24, restricted by the U-shaped plate 21, when the first gear 22 rotates, the inside of the first gear 22 rotates outside the fixed shaft 24, prompting the fixed shaft 24 not to rotate accordingly, and further prompting the positioning rod 26 not to rotate accordingly, thus facilitating the use of the limiting plate 28. At the same time, when the first gear 22 rotates and moves on the top of the first rack 39 by using the tooth grooves, it will also drive the fixed shaft 24 to move, and further prompt the fixed shaft 24 to drive the U-shaped plate 21 to move, thus facilitating the movement of the slider 20 with the adjusting box 15, and further facilitating the adjustment of the position of the calf bracket.

[0047] As shown in Figures 1 to 9 the figure, a limiting plate 28 is fixedly connected to the top of the end of the positioning rod 26 far from the positioning hole 27. A U-shaped block 23 is fixedly connected to one side of the U-shaped plate 21. An L-shaped block 29 and a connecting rod 30 are slidably connected inside the U-shaped block 23. The top of the L-shaped block 29 penetrates through the inside of the U-shaped block 23 and is fixedly connected to the top of the connecting rod 30. The position of the bottom of the L-shaped block 29 corresponds to the position of the top of the limiting plate 28. Inclined angles are respectively formed on the mutually corresponding sides of the limiting plate 28 and the L-shaped block 29. A track plate 35 is fixedly connected to one side of the bottom of the end of the U-shaped block 23 far from the U-shaped plate 21. A pulley 36 is rotatably connected to the bottom of the track plate 35. A foot rope 46 is fixedly connected to the end of the positioning rod 26 far from the positioning hole 27. A third chute 45 is formed in the bottom of one side of the bottom box 1. One end of the foot rope 46 far from the pulley 36 passes through the outside of the pulley 36 and the inside of the third chute 45 and is placed outside the bottom box 1. One end of the foot rope 46 far from the positioning rod 26 is circular;

[0048] By means of the arranged foot rope 46, limiting plate 28 and L-shaped block 29, as Figure 6 , Figure 7 and Figure 9 shown, when adjusting the position of the lower leg, by pulling the foot rope 46, one end of the positioning rod 26 is urged away from the inside of the positioning hole 27. At the same time, since the positioning rod 26 is slidably clamped inside the fixed shaft 24, the positioning rod 26 will slide inside the fixed shaft 24 and compress the first spring 25. At this time, the limiting plate 28 at the top of the other end of the positioning rod 26 will continuously move towards one side at the bottom of the L-shaped block 29. At this time, by providing an inclined angle at the top of the limiting plate 28 and the bottom of the L-shaped block 29, the limiting plate 28 will push against the top of the L-shaped block 29 and move upward, thereby causing the limiting plate 28 to pass through the bottom of the L-shaped block 29. At the same time, under the action of the second spring 31, the bottom of the L-shaped block 29 will resist the limiting plate 28 on one side of the L-shaped block 29, thereby fixing the position of the positioning rod 26, facilitating the movement of the first gear 22. At the same time, by providing one end of the foot rope 46 to be circular, it is convenient for medical staff to pull the foot rope 46 with their feet for movement. Since medical staff's hands need to operate other instruments during the operation, it is convenient for medical staff to use.

[0049] As Figures 6 to 9 shown, a trapezoidal block 33 is slidably clamped on the top of the track plate 35. A second spring 31 is sleeved outside the connecting rod 30. One end of the second spring 31 is fixedly connected to the outside of one end of the connecting rod 30, and the other end of the second spring 31 is fixedly connected to the bottom of the U-shaped block 23. The bottom of the connecting rod 30 is rotatably connected to a connecting block 32, and the bottom of the connecting block 32 is in contact with the inclined side at the top of the trapezoidal block 33. A release bolt 57 is fixedly connected to the other side of the trapezoidal block 33. A third spring 34 is sleeved outside one end of the release bolt 57. One end of the third spring 34 is fixedly connected to one side of the trapezoidal block 33, and the other end of the third spring 34 is fixedly connected to one side of the bottom of the U-shaped block 23. A second chute 44 is opened at the top of one side of the bottom box 1, and the end of the release bolt 57 away from the trapezoidal block 33 respectively penetrates through the bottom of the U-shaped block 23 and the inside of the second chute 44;

[0050] By means of the arranged trapezoidal block 33, release bolt 57 and connecting block 32, as Figure 6 , Figure 7 and Figure 9As shown, when the first gear 22 is adjusted to the proper position, the medical staff can use their body or arm to push the release bolt 57 to move. At this time, the third spring 34 is stretched. Meanwhile, by setting the inclination angle on one side of the top of the trapezoidal block 33, it is urged that the trapezoidal block 33 pushes the connecting block 32 to move upward. Further, when the connecting rod 30 moves upward, it drives the second spring 31 to contract, and at the same time drives the L-shaped block 29 to move upward. At this time, the bottom of the L-shaped block 29 will move away from the top of the limit plate 28. At this time, the first spring 25 drives the positioning rod 26 to automatically rebound, so that one end of the positioning rod 26 is inserted into the corresponding positioning hole 27 again, thereby fixing the position of the first gear 22. When the release bolt 57 is released at this time, the third spring 34 automatically rebounds and drives the trapezoidal block 33 to move back to its original position. At this time, the second spring 31 drives the connecting rod 30 to automatically rebound, so that the L-shaped block 29 moves back to the position corresponding to the limit plate 28, which is convenient for the next use. At the same time, by setting the U-shaped block 23 to be fixedly connected to the U-shaped plate 21, it can be ensured that these mechanisms can move along with the movement of the first gear 22, which is convenient for the fixing of the positioning rod 26 at different positions. At the same time, by setting the second chute 44 and the third chute 45, it is convenient for the release bolt 57 and the foot rope 46 to move inside. It should be noted here that in actual use, the elastic coefficient of the second spring 31 is greater than that of the first spring 25.

[0051] As Figures 1 to 8 shown, the stretching assembly includes third racks 42 and second racks 41 that are symmetrically arranged and slidably clamped to the inner bottom of the bottom box 1. The inner bottom of the bottom box 1 is rotatably connected with a second gear 40. The two sides of the second gear 40 are respectively meshed with one side of the third rack 42 and the second rack 41. The top of one end of the second rack 41 is fixedly connected with an L-shaped rod 38. An annular groove 37 is formed on one side of the first gear 22. The end of the L-shaped rod 38 away from the second rack 41 is slidably clamped inside the annular groove 37. The top of one end of the third rack 42 is fixedly connected with a connecting plate 43. A fifth chute 48 and a fourth chute 47 are formed on one side of the bottom box 1. One side of the top of the connecting plate 43 is fixedly connected with a sliding plate 49. One end of the sliding plate 49 passes through the inside of the fifth chute 48 and is rotatably connected with a foot rod 52 through a shaft. A U-shaped clamp 50 is slidably clamped on one side of the fourth chute 47. U-shaped elastic pieces 51 are symmetrically arranged inside the U-shaped clamp 50. The end of the foot rod 52 away from the sliding plate 49 is clamped between the two elastic pieces 51. When the second thigh plate 3 and the second calf plate 6 are in a parallel state, the position of the foot rod 52 is on one side of the bottom box 1 away from the foot box 7;

[0052] Through the setting of the stretching component, the patient can stretch and exercise the knee joint after the operation, which helps to accelerate the recovery process. In cooperation with the adjustment component, the patient's legs can be properly stretched and exercised at different positions to promote the recovery of joint mobility. At the same time, through the setting of the foot rod 52 and the hand rope 19, the other leg and arm are used to drive the operated leg for training, thereby promoting blood circulation throughout the patient's body, guiding the patient to perform beneficial rehabilitation exercises, and avoiding muscle atrophy and limited activity problems caused by long-term bed rest. When the operation is completed, the foot rope 46 is pulled to cause one end of the positioning rod 26 to move away from the inside of the positioning hole 27, and the limiting plate 28 is fixed on one side of the L-shaped block 29. At this time, the limit of the first gear 22 is released, so that the calf support can move freely. At this time, one end of the foot rope 46 is wrapped around the outside of the release bolt 57 that passes through one end of the second slide groove 44, thereby preventing the foot rope 46 from affecting the later exercise use. Later, when rehabilitation training is needed after the leg operation, such as Figure 3 and Figure 4 As shown, one end of the foot rod 52 is taken out from between the two spring pieces 51, and the foot rod 52 will be parallel to the slide plate 49. Then, the other foot is used to step on the foot rod 52, so that the connecting plate 43 and the third rack 42 move toward one end of the bottom box 1, and at the same time, the second rack 41 moves in the opposite direction through the second gear 40. At this time, the L-shaped rod 38 and the first gear 22 are fixed on the top of the first rack 39 through the annular groove 37, thereby prompting the calf plate to move with the calf, thereby prompting the other leg to flex the knee joint with the operated leg, so that both legs can achieve a circular motion. The U-shaped card 50, the fourth slide groove 47 and the fifth slide groove 48 are arranged, and during the early stage of the operation, one end of the foot rod 52 can be inserted between the two spring pieces 51 by utilizing the spring force of the spring piece 51, thereby avoiding the problem of the foot rod 52 affecting the operation. At the same time, when the first gear 22 is moved during the operation, the U-shaped card 50 and the slide plate 49 can slide in the fourth slide groove 47 and the fifth slide groove 48, thereby facilitating the movement of the first gear 22 and the storage of the foot rod 52.

[0053] like Figures 1 to 3 As shown, a placement box 14 is fixedly connected to the bottom of both ends of the U-shaped frame 13, and a hand rope 19 is placed inside the two placement boxes 14. One end of the hand rope 19 is fixedly connected to the inside of the placement box 14, and the shape of the hand rope 19 away from the end of the placement box 14 is circular, and the length of the hand rope 19 is greater than the length between the first thigh board 2 and the first calf board 5, and the distance between the two placement boxes 14 is greater than the distance between the two first thigh boards 2;

[0054] By providing the placement box 14 and the hand strap 19, as Figure 1 , Figure 2 andFigure 3 As shown, during rehabilitation training, when the other leg is training with the operated leg, the placement box 14 can also be opened, and the two hand ropes 19 can be taken out from the inside of the placement box 14. At this time, one end of the hand rope 19 is circularly placed on the patient's hand, and the patient can pull the hand rope 19 with the hand to drive the U-shaped frame 13 to move, so that the calf bends, and further achieves the effect of assisting the other leg to drive the operated leg to perform bending training, thereby enabling all four limbs of the patient to achieve the training effect, avoiding stiffness of the patient's four limbs after surgery, resulting in poor blood circulation, and thus affecting the recovery of the operated leg. At the same time, it also avoids the problems of muscle atrophy and limited mobility caused by long-term bed rest. At the same time, through the provided placement box 14, during the operation, the hand rope 19 can be stored inside the placement box 14, thereby preventing the hand rope 19 from affecting the operation.

[0055] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions. Additionally, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A lower limb fixation device for orthopedic knee replacement surgery, characterized in that: The invention comprises a bottom box (1), the top of which is provided with a fixing assembly for fixing the patient's legs, the fixing assembly comprising two first thigh boards (2), two first calf boards (5) and two foot boxes (7) which are symmetrically arranged on the top of the bottom box (1), the first thigh board (2) having one end internally slidably clamped with a second thigh board (3), the other end of the second thigh board (3) being rotatably connected to a side board (4) via an axis, the other end of the side board (4) being rotatably connected to a second calf board (6) via an axis, The other end of the second calf plate (6) is slidably engaged with the inside of one end of the first calf plate (5); the other end of the first calf plate (5) is rotatably connected to a foot box (7) via an axis; the tops of the first thigh plate (2), the second thigh plate (3), the first calf plate (5) and the second calf plate (6) are respectively provided with straps (10); the bottoms of the first thigh plate (2) and the second thigh plate (3) are respectively provided with thigh cloths (8); the bottoms of the first calf plate (5) and the second calf plate (6) are respectively provided with calf cloths (9); An adjustment component for adjusting the knee flexion angle of a patient's legs during surgery is arranged inside the base box (1), and the adjustment component is used in conjunction with the fixing component; A positioning component for positioning the adjustment component at any position during surgery is arranged inside the base box (1), and the positioning component is used in conjunction with the adjustment component; The outside of the base box (1) is provided with a stretching component for the patient to perform knee joint exercises after surgery; The stretching component cooperates with the adjusting component and can be used for auxiliary operation during surgery and for patient rehabilitation exercise after surgery.

2. The lower limb fixation device for orthopedic knee replacement surgery according to claim 1, characterized in that: The foot box (7) is L-shaped in shape, and the thigh cloth (8) and the calf cloth (9) are U-shaped in shape. One end of the bottom box (1) is symmetrically fixedly connected with two connecting plates (11). The other end of the connecting plate (11) is internally slidably clamped with an L-shaped plate (12). The ends of the two L-shaped plates (12) away from the connecting plate (11) are respectively rotatably connected to one end of the first thigh plate (2) through an axis. One side of the connecting plate (11), the first thigh plate (2) and the first calf plate (5) are all provided with a plurality of adjustment holes (56). The second thigh plate (3) and the second calf plate (5) are The inside of one side of the second thigh plate (6) and the L-shaped plate (12) is respectively installed with an adjustment bolt (55) through a spring sheet, and the ends of the plurality of adjustment bolts (55) away from the spring sheet respectively penetrate the side walls of the second thigh plate (3), the second calf plate (6) and the L-shaped plate (12) and are connected to the inside of the adjustment hole (56), and the foot box (7) is fixedly connected with an alignment plate (53) on one side of the axis connecting the first calf plate (5), and the two sides of the inside of one end of the first calf plate (5) are respectively fixedly connected with a limiting block (54), and the position of the limiting block (54) corresponds to the position of the alignment plate (53).

3. The lower limb fixation device for orthopedic knee replacement surgery according to claim 2, characterized in that: The outside of the connecting shaft of the first calf plate (5) and the foot box (7) is rotatably connected to a U-shaped frame (13); the top of the bottom box (1) is slidably connected to an adjustment box (15); a movable groove is provided on the top of the adjustment box (15); the interior of the movable groove is slidably engaged with the middle part of the bottom of the U-shaped frame (13); a plurality of insertion holes (16) are provided on both sides of the adjustment box (15); the interior of the insertion hole (16) is slidably connected to an insertion rod (17); one end of the insertion rod (17) passes through one side of the adjustment box (15) and the interior of the bottom of the U-shaped frame (13) and is connected to the insertion hole (16) on the other side of the adjustment box (15).

4. The lower limb fixation device for orthopedic knee replacement surgery according to claim 3, characterized in that: The adjustment component comprises a first rack (39) fixedly connected to the bottom of the bottom box (1); the top of the first rack (39) is meshedly connected with a first gear (22); the middle of the first gear (22) is internally rotatably engaged with a fixed shaft (24); the tops of both ends of the fixed shaft (24) are fixedly connected with U-shaped plates (21); the top of the U-shaped plate (21) is fixedly connected with a slider (20); the top of the bottom box (1) is provided with a first slide groove (18); the top of the slider (20) passes through the inside of the first slide groove (18) and is fixedly connected to the bottom of the adjustment box (15).

5. The lower limb fixation device for orthopedic knee replacement surgery according to claim 4, characterized in that: The positioning assembly comprises a positioning rod (26) which is slidably engaged with the interior of a fixed shaft (24); a first spring (25) is sleeved on the exterior of the positioning rod (26); one end of the first spring (25) is fixedly connected to the interior of one end of the fixed shaft (24); the other end of the first spring (25) is fixedly connected to the exterior of one end of the positioning rod (26); a plurality of positioning holes (27) are provided on the inner wall of the base box (1); the positions of the plurality of positioning holes (27) correspond to the positions of the positioning rod (26); when one end of the positioning rod (26) is inserted into the interior of the positioning hole (27), the first spring (25) is in a rebound state and the position of the first gear (22) is fixed.

6. The lower limb fixation device for orthopedic knee replacement surgery according to claim 5, characterized in that: The top of one end of the positioning rod (26) away from the positioning hole (27) is fixedly connected to a limiting plate (28); one side of the U-shaped plate (21) is fixedly connected to a U-shaped block (23); the interior of the U-shaped block (23) is slidably connected to an L-shaped block (29) and a connecting rod (30); the top of the L-shaped block (29) passes through the interior of the U-shaped block (23) and is fixedly connected to the top of the connecting rod (30); the position of the bottom of the L-shaped block (29) corresponds to the position of the top of the limiting plate (28); and the limiting plate (28) and the L-shaped block (29) are provided with an inclination angle on the corresponding sides thereof.

7. The lower limb fixation device for orthopedic knee replacement surgery according to claim 6, characterized in that: A track plate (35) is fixedly connected to one side of the bottom of one end of the U-shaped block (23) away from the U-shaped plate (21); a pulley (36) is rotatably connected to the bottom of the track plate (35); a foot rope (46) is fixedly connected to one end of the positioning rod (26) away from the positioning hole (27); a third slide groove (45) is provided at the bottom of one side of the bottom box (1); an end of the foot rope (46) away from the pulley (36) passes through the outside of the pulley (36) and the inside of the third slide groove (45) and is placed outside the bottom box (1); and an end of the foot rope (46) away from the positioning rod (26) is round.

8. The lower limb fixation device for orthopedic knee replacement surgery according to claim 7, characterized in that: The top of the track plate (35) is slidably connected with a trapezoidal block (33), the outside of the connecting rod (30) is sleeved with a second spring (31), one end of the second spring (31) is fixedly connected to the outside of one end of the connecting rod (30), and the other end of the second spring (31) is fixedly connected to the bottom of the U-shaped block (23), the bottom of the connecting rod (30) is rotatably connected with a connecting block (32), the bottom of the connecting block (32) is in contact with the inclined side of the top of the trapezoidal block (33), and the trapezoidal block (33) The other side of the bottom box (1) is fixedly connected with a release bolt (57), one end of the release bolt (57) is sleeved with a third spring (34), one end of the third spring (34) is fixedly connected to one side of the trapezoidal block (33), and the other end of the third spring (34) is fixedly connected to one side of the bottom of the U-shaped block (23), and a second slide groove (44) is provided on the top of one side of the bottom box (1), and one end of the release bolt (57) away from the trapezoidal block (33) passes through the bottom of the U-shaped block (23) and the inside of the second slide groove (44) respectively.

9. The lower limb fixation device for orthopedic knee replacement surgery according to claim 4, characterized in that: The stretching assembly comprises a third rack (42) and a second rack (41) which are symmetrically arranged and slidably engaged with the bottom of the bottom box (1); the bottom of the bottom box (1) is rotatably connected to a second gear (40); the two sides of the second gear (40) are respectively meshed with the third rack (42) and one side of the second rack (41); the top of one end of the second rack (41) is fixedly connected to an L-shaped rod (38); an annular groove (37) is provided on one side of the first gear (22); one end of the L-shaped rod (38) away from the second rack (41) is slidably engaged with the inside of the annular groove (37); the top of one end of the third rack (42) is fixedly connected to a connecting plate (43); A fifth slide groove (48) and a fourth slide groove (47) are provided on one side of the bottom box (1); a slide plate (49) is fixedly connected to one side of the top of the connecting plate (43); one end of the slide plate (49) passes through the inside of the fifth slide groove (48) and is rotatably connected to a foot rod (52) via an axis; a U-shaped card (50) is slidably connected to one side of the fourth slide groove (47); a U-shaped spring sheet (51) is symmetrically arranged inside the U-shaped card (50); an end of the foot rod (52) away from the slide plate (49) is clamped between the two spring sheets (51); when the second thigh plate (3) and the second calf plate (6) are in a parallel state, the position of the foot rod (52) is located on the side of the bottom box (1) away from the end of the foot box (7).

10. The lower limb fixation device for orthopedic knee replacement surgery according to claim 3, characterized in that: The bottoms of both ends of the U-shaped frame (13) are fixedly connected with a placement box (14), and a hand rope (19) is placed inside the two placement boxes (14). One end of the hand rope (19) is fixedly connected to the inside of the placement box (14), and the shape of the hand rope (19) away from the end of the placement box (14) is circular, and the length of the hand rope (19) is greater than the length between the first thigh board (2) and the first calf board (5), and the distance between the two placement boxes (14) is greater than the distance between the two first thigh boards (2).

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