Auxiliary device for anterior cruciate ligament reconstruction

Abstract

The utility model belongs to the technical field of medical instruments, and discloses an anterior cruciate ligament reconstruction auxiliary device which comprises a fixing seat and a supporting structure arranged on the upper portion of the fixing seat, the supporting structure comprises a lower limb supporting mechanism and a deflection driving assembly, the lower limb supporting mechanism comprises a leg supporting piece, and the leg supporting piece is used for assisting in maintaining a knee bending position. The lower limb supporting mechanism is rotationally connected to the fixing base, and the deflection driving assembly is in transmission connection with the lower limb supporting mechanism and can drive the lower limb supporting mechanism to deflect towards the left and right sides of the human body relative to the fixing base around the axis parallel to the body length direction of the human body. Flexible adjustment of the leg position of a patient in an operation is achieved through deflection of the whole lower limb supporting mechanism relative to the fixing base and deflection of the shank supporting part relative to the thigh supporting part, actual operation requirements of different patients and operation habits of different doctors are better met, the doctors are helped to improve the operation efficiency, the operation success rate is guaranteed, and the operation efficiency is improved. And a patient can obtain a good surgical treatment effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to an auxiliary device for anterior cruciate ligament reconstruction. Background Art

[0002] Anterior cruciate ligament injury of the knee is a common injury in the field of sports medicine. After anterior cruciate ligament injury, anterior cruciate ligament reconstruction surgery is often required to restore the patient's knee joint function. During anterior cruciate ligament reconstruction surgery, the affected knee often needs to maintain a certain knee flexion position to complete the corresponding surgical operation. Traditional intraoperative operations usually use sandbags to block the patient's legs or manually assist the patient to maintain a knee flexion position. However, sandbag blocking has poor stability and is difficult to adjust when the patient's position needs to be adjusted during surgery. Manual assistance has the risk of operational errors due to physical problems or lack of concentration. Therefore, Chinese patent CN217723723U (application number: 202221592111.2) discloses an intraoperative device for anterior cruciate ligament reconstruction of the knee, in which a support rod is used to support the knee joint and move upward, so that the patient can effectively maintain a certain knee flexion angle when undergoing ligament reconstruction surgery. However, in the above technical solution, the patient's thighs and calves lack support, and the popliteal fossa is supported by the support rod for a long time, which can easily cause poor blood flow in the legs, on the one hand, easily leading to leg numbness, and on the other hand, easily affecting surgical operations.

[0003] Therefore, Chinese patent CN221904573U (application number: 202420491843.5) also discloses a device for anterior cruciate ligament reconstruction surgery of the knee joint, in which support guards are set for the patient's thigh and calf, thereby avoiding the problem of poor blood flow in the legs caused by long-term pressure on a single position of the popliteal fossa.

[0004] However, during actual surgical procedures, when using an arthroscopic lens to observe the internal conditions of the knee joint cavity before surgery, the patient's calf must be tilted relative to the thigh to a certain angle to widen the opening of the knee joint cavity for a clearer observation. Furthermore, due to differences in body shape and surgical habits between surgeons, the patient's legs must be tilted to the sides of the body to facilitate better surgical operation. The aforementioned patented technical solution can only assist patients in maintaining an upright, knee-flexed position, and its adaptability to the actual surgical requirements is still relatively poor.

[0005] This shows that the existing technology still has certain defects. Utility Model Content

[0006] In view of this, the present invention aims to propose an auxiliary device for anterior cruciate ligament reconstruction surgery, which realizes flexible adjustment of the patient's leg position during surgery through the deflection of the lower limb support mechanism as a whole relative to the fixed seat and the deflection of the calf support part relative to the thigh support part, so as to better adapt to the actual surgical needs of different patients and the surgical operation habits of different doctors, which is beneficial to assisting doctors to improve surgical efficiency, ensure the success rate of surgery, and help patients obtain good surgical treatment results.

[0007] To achieve the above purpose, the technical solution of the utility model is implemented as follows:

[0008] An anterior cruciate ligament reconstruction auxiliary device includes a fixing seat and a support structure arranged on the upper part of the fixing seat, a fixing mechanism is provided at the bottom of the fixing seat, and the fixing seat is detachably connected to the operating table through the fixing mechanism, the support structure includes a lower limb support mechanism and a deflection drive assembly, the lower limb support mechanism includes a leg support member, and the leg support member is used to assist in maintaining a flexed knee position, the lower limb support mechanism is rotatably connected to the fixing seat, and the deflection drive assembly is driven and connected to the lower limb support mechanism and can drive the lower limb support mechanism to deflect toward the left and right sides of the human body relative to the fixing seat around an axis parallel to the length direction of the human body.

[0009] By adopting the above scheme, the deflection of the lower limb support mechanism relative to the fixed seat drives the patient's legs to deflect toward both sides of the body at a certain angle, thereby making it easier for doctors of different heights and body shapes to obtain a good surgical field, and also easier to adapt to the surgical habits of different doctors, facilitate the doctor's surgical operation, improve the surgical efficiency, and help patients obtain better surgical treatment results.

[0010] As a preferred embodiment of the present application, the lower limb support mechanism includes a bottom frame, the leg support member is arranged on the upper portion of the bottom frame, a deflection axis is arranged on the lower portion of the bottom frame, the fixed seat is provided with an axle seat corresponding to the deflection axis, the deflection axis and the axle seat are correspondingly matched, and the deflection drive assembly includes a deflection drive motor arranged on the fixed seat, the deflection drive motor and the deflection axis are driven to drive the bottom frame to deflect relative to the fixed seat. Compared with manual operation, using a deflection drive motor to drive the deflection of the lower limb support mechanism reduces the difficulty of operation and makes the deflection process more stable and efficient.

[0011] As a preferred embodiment of the present application, it also includes a deflection limit mechanism, which includes a limit plate arranged on a fixed seat, a limit pin arranged on the bottom frame, and a limit fastener cooperating with the limit pin. The limit plate is arranged on one side or both sides of the bottom frame along the length direction of the human body, and the limit plate is provided with an arc-shaped channel adapted to the deflection motion trajectory of the bottom frame, and the limit pin passes through the arc-shaped channel and cooperates with the arc-shaped channel; the limit pin and the limit fastener have a locked state and a released state. In the released state, the limit pin can move along the arc-shaped channel with the deflection of the bottom frame, and in the locked state, the limit fastener is locked and cooperated with the limit pin and fixed on the limit plate.

[0012] By setting up a deflection limiting mechanism, the bottom frame can be limited and fixed after the lower limb support mechanism reaches the required deflection position, thereby ensuring the stability of the deflection state of the lower limb support mechanism and ensuring the safe and stable progress of the surgical operation.

[0013] As a preferred embodiment of the present application, it also includes a deflection control mechanism, which includes an angle detection component and a controller connected to the angle detection component and the deflection drive motor respectively. The angle detection component is used to detect the deflection angle of the bottom frame and output angle information. The controller receives the angle information and controls the start and stop of the deflection drive motor.

[0014] By adopting the above scheme, the automatic deflection and automatic control of the lower limb support mechanism can be achieved through the setting of the angle detection member and the controller, which greatly improves the convenience of the auxiliary device.

[0015] As a preferred embodiment of the present application, the leg support member includes a thigh support portion and a calf support portion, the two ends of the thigh support portion are rotatably connected to the bottom frame and the calf support portion respectively, and the lower limb support mechanism also includes a movable seat connected to the bottom frame, the other end of the calf support portion is hinged to the movable seat and can move relative to the bottom frame along the direction of human body length with the movable seat.

[0016] As a preferred embodiment of the present application, one end of the thigh support part is hinged to the bottom frame, and the other end of the thigh support part is connected to the end of the calf support part facing the thigh support part through a ball joint, and the end of the calf support part facing the movable seat is provided with a connecting ring, which is rotatably connected to the end of the calf support part and can rotate relative to the calf support part around a vertical axis, and the connecting ring is sleeved on the connecting shaft on the upper part of the movable seat and can move relative to the connecting shaft along the axial direction of the connecting shaft.

[0017] As a preferred embodiment of the present application, an axial limiting device is further provided on the connecting shaft, and the axial limiting device is matched with the connecting ring in a limiting manner.

[0018] As a preferred embodiment of the present application, both the thigh support portion and the calf support portion adopt a telescopic structure. Preferably, the thigh support portion includes a first fixed section and a first telescopic section, the first fixed section having a first accommodating cavity disposed therein, the first telescopic section being disposed in the first accommodating cavity and being capable of telescoping into and out of the first accommodating cavity, and the calf support portion includes a second fixed section and a second telescopic section, the second fixed section having a second accommodating cavity disposed therein, the second telescopic section being disposed in the second accommodating cavity and being capable of telescoping into and out of the second accommodating cavity, the first fixed section being hinged to the bottom frame, the first telescopic section and the second telescopic section being connected via a spherical joint, and the second fixed section being hinged to the movable seat.

[0019] This structure can adapt to the horizontal deflection of the calf support part relative to the thigh support part on the one hand, and on the other hand, it can also adapt to the needs of patients with different heights and leg lengths, thereby improving the versatility and ease of use of the device.

[0020] As a preferred embodiment of the present application, the bottom frame includes a main frame and a sub-frame, the sub-frame is arranged inside the main frame and can move horizontally relative to the main frame, the thigh support part is hinged to the main frame, and the movable seat is provided on the sub-frame.

[0021] As a preferred embodiment of the present application, the lower limb support mechanism further includes a hip extension connected to the thigh support portion and a foot brace connected to the calf support portion. The hip extension is used to support the patient's hip-femoral connection, and the foot brace is used to support the patient's foot and stabilize the ankle joint. The hip extension can provide support for the patient's hip-leg connection, improving comfort while preventing the edge of the thigh support from abutting the hip-leg connection for a long time, which could lead to poor blood circulation in the legs. The foot brace ensures the relative stability between the patient's foot and calf, preventing the swinging of the foot from causing the calf to deflect and affect the surgical procedure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of a partial structure of an anterior cruciate ligament reconstruction assistive device from one perspective;

[0024] Figure 2A schematic diagram of a partial structure of an anterior cruciate ligament reconstruction assistive device from another perspective;

[0025] Figure 3 A schematic diagram of the structure of a lower limb support assembly when it deflects relative to a fixed seat in an example;

[0026] Figure 4 is a structural diagram of a deflection limiting mechanism in an example;

[0027] Figure 5 A side view of a partial structure of an anterior cruciate ligament reconstruction assist device in one example;

[0028] Figure 6 Schematic diagram of the control structure of the deflection control mechanism.

[0029] List of parts and reference numerals:

[0030] 1 fixed seat, 11 shaft seat;

[0031] 21 waterproof cover, 22 limiting plate, 23 limiting fastener;

[0032] 3 lower limb support mechanism, 31 bottom frame, 311 main frame, 3111 deflection axis, 312 sub-frame, 3121 lead screw, 3122 moving seat, 3123 connecting shaft, 3124 lead screw motor;

[0033] 4 leg support, 41 thigh support part, 411 first fixed section, 412 first telescopic section, 42 calf support part, 421 second fixed section, 4211 connecting ring, 422 second telescopic section, 43 ball joint, 44 hip extension part, 45 foot support;

[0034] 51: Angle detection component, 52: Controller. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0036] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific implementation methods disclosed below.

[0037] like Figures 1-6As shown, the present application provides an auxiliary device for anterior cruciate ligament reconstruction surgery, which includes a fixed seat 1 and a support structure arranged on the upper part of the fixed seat 1. The bottom of the fixed seat 1 is provided with a fixing mechanism, and the fixed seat 1 is detachably connected to the operating table through the fixing mechanism. The support structure includes a lower limb support mechanism 3 and a deflection drive assembly. The lower limb support mechanism 3 includes a leg support member 4, and the leg support member 4 is used to assist in maintaining a flexed knee position. The lower limb support mechanism 3 is rotatably connected to the fixed seat 1. The deflection drive assembly is driven by the lower limb support mechanism 3 and is capable of driving the lower limb support mechanism 3 to deflect toward the left and right sides of the human body relative to the fixed seat 1 around an axis parallel to the length of the human body. Preferably, the bottom surface of the fixed seat is also provided with an anti-slip structure such as an anti-slip rubber pad.

[0038] It should be noted here that the present application does not make any specific restrictions on the specific structural form of the fixing mechanism and the method of connection between it and the operating bed. The fixing mechanism can adopt mechanical locks or straps or other fixing parts that are convenient for connecting and fixing with the operating bed, and can also be adaptively adjusted according to the actual connection structure of the operating bed.

[0039] By adopting the above structure, while utilizing the lower limb support mechanism 3 to assist the patient in positioning the patient in the knee-flexed position, the deflection of the lower limb support mechanism 3 relative to the fixed seat 1 can drive the patient's legs to deflect toward both sides of the body at a certain angle, thereby facilitating doctors of different heights and body shapes to obtain a good surgical field, and also facilitating the adaptation to the surgical habits of different doctors, facilitating the doctor's surgical operation, improving the surgical efficiency, and helping patients to obtain better surgical treatment results.

[0040] Further, refer to Figure 1 、 Figure 2 and Figure 5 As shown, the lower limb support mechanism 3 includes a bottom frame 31, a leg support member 4 is disposed on the upper portion of the bottom frame 31, a deflection shaft 3111 is disposed on the lower portion of the bottom frame 31, and a fixed base 1 is provided with an axis seat 11 corresponding to the deflection shaft 3111. The deflection shaft 3111 corresponds to the axis seat 11. The deflection drive assembly includes a deflection drive motor disposed on the fixed base 1 and shielded by a waterproof cover 21. The deflection drive motor and the deflection shaft 3111 drive the bottom frame 31 relative to the fixed base 1. Compared to manual operation, using the deflection drive motor to drive the deflection of the lower limb support mechanism 3 reduces the operational difficulty and makes the deflection process more stable and efficient. At the same time, because a large amount of physiological saline is required for intraoperative arthroscopic flushing and surgical field cleaning, a waterproof structure such as a waterproof cover 21 is also provided on the fixed base 1 in the present application to shield the deflection drive motor, thereby preventing physiological saline from leaking into the motor and causing motor damage or accidents such as electric shock.

[0041] Continue to refer to Figure 4As shown, it also includes a deflection limit mechanism, the deflection limit mechanism includes a limit plate 22 arranged on the fixed seat 1, a limit pin arranged on the bottom frame 31, and a limit fastener 23 cooperating with the limit pin. The limit plate 22 is arranged on one side or both sides of the bottom frame 31 along the length direction of the human body, and an arc-shaped channel adapted to the deflection movement trajectory of the bottom frame 31 is opened on the limit plate 22. The limit pin passes through the arc-shaped channel and cooperates with the arc-shaped channel. In actual use, the limit pin and the limit fastener 23 have a locked state and a released state. In the released state, the limit pin can move along the arc-shaped channel with the deflection of the bottom frame 31. In the locked state, the limit fastener 23 is locked and cooperated with the limit pin to be fixed on the limit plate 22. Preferably, the limit fastening clip is a buckle. After the bottom frame 31 is deflected into place, the buckle can be manually operated to clamp the buckle on the limit plate 22, and the friction between the buckle and the limit plate 22 is used to achieve limitation. In the above scheme, by setting up a deflection limiting mechanism, the stability of the deflection path of the bottom frame 31 and the lower limb support mechanism 3 can be guaranteed, and the bottom frame 31 can be limited and fixed after the lower limb support mechanism 3 reaches the required deflection position, thereby ensuring the stability of the deflection state of the lower limb support mechanism 3 and ensuring the safe and stable progress of the surgical operation.

[0042] It should be noted here that the deflection limiting mechanism in the present application is not limited to the above example. The above example is only a preferred example of the present application. It can also achieve deflection limiting by using a clamp to clamp the deflection shaft 3111, or by setting a corresponding anti-rotation gear set on the deflection shaft 3111 and the fixed seat 1. An auxiliary support structure can also be provided to perform deflection limiting on the bottom frame 31. The present application does not make any specific restrictions on this.

[0043] As a preferred embodiment of this application, refer to Figure 6 As shown, a deflection control mechanism is also provided, comprising an angle detection member 51 and a controller 52 connected to the angle detection member 51 and the deflection drive motor, respectively. The angle detection member 51 is used to detect the deflection angle of the bottom frame 31 and output angle information. The controller 52 receives the angle information and controls the start and stop of the deflection drive motor. Preferably, the angle detection member 51 uses an absolute value encoder. The absolute value encoder can directly output the absolute angle value of the deflection axis 3111 rather than a relative angle or incremental signal, and can determine the angle without relying on an external counter or reference point. The absolute value encoder has strong anti-interference ability and can realize power-off memory. After restarting, it can directly output the current angle without re-finding the origin, simplifying the system design and reducing maintenance costs. In addition, the absolute value encoder is easy to install, compact in structure, and supports self-diagnosis functions, making it easy to integrate into the bottom frame 31. By adopting the above solution, automatic deflection and automatic control of the lower limb support mechanism 3 can be achieved, greatly improving the convenience of the auxiliary device.

[0044] It should be noted here that the present application also does not make any specific restrictions on the type and structure of the angle detection component 51. The use of an absolute encoder is only a preferred example of the present application, and it can also use other more different types of angle sensors.

[0045] Further, refer to Figure 1 and Figure 2 As shown, the leg support 4 includes a thigh support portion 41 and a calf support portion 42. The two ends of the thigh support portion 41 are rotatably connected to the bottom frame 31 and the calf support portion 42 respectively. The lower limb support mechanism 3 also includes a movable seat 3122 connected to the bottom frame 31. The other end of the calf support portion 42 is hinged to the movable seat 3122 and can move relative to the bottom frame 31 along the length direction of the human body with the movable seat 3122. With the above structure, the deflection of the calf support portion 42 relative to the thigh support portion 41 in the horizontal direction can drive the patient's calf to deflect relative to the thigh at a certain angle, so that the knee joint cavity can be expanded to a certain extent compared to the normal state, making it easier to use an arthroscope to observe the internal state of the joint, and making it easier for doctors to grasp the patient's condition more accurately and adopt more targeted surgical operations to enable patients to obtain better treatment effects. In one example, continue to refer to Figures 1-4 As shown, one end of the thigh support portion 41 is hinged to the bottom frame 31, and the other end of the thigh support portion 41 is connected to the end of the calf support portion 42 facing the thigh support portion 41 through a ball joint 43. The end of the calf support portion 42 facing the movable seat 3122 is provided with a connecting ring 4211, which is rotatably connected to the end of the calf support portion 42 and can rotate relative to the calf support portion around a vertical axis. Figure 4 The connecting ring 4211 is sleeved on the connecting shaft 3123 at the upper portion of the movable seat 3122 and slidably engages with the connecting shaft 3123. The connecting ring 4211 can move relative to the connecting shaft 3123 along the axial direction of the connecting shaft 3123. Preferably, the connecting shaft 3123 is also provided with an axial limiting device, which cooperates with the connecting ring 4211 to limit the position. In a preferred embodiment, the axial limiting device is a detachable clamp (not shown) provided on the connecting shaft 3123. When in use, the clamp is provided on both sides of the connecting ring 4211. When the connecting ring 4211 is moved into position along the connecting shaft 3123, the clamp is locked and fixed on the connecting shaft 3123, thereby clamping the connecting ring 4211 in the desired position, which is convenient to use and has reliable limiting function. It should be noted that the axial limiting device in this application is not limited to the clamp in the above example. The above example is only a preferred example of this application. The axial limiting device can also be a limiting member in other structural forms such as a limit block, and this application does not specifically limit this.

[0046] Reference Figure 1 、 Figure 2 and Figure 5 As shown, as a preferred embodiment of the present application, the thigh support portion 41 and the calf support portion 42 in the present application both adopt a telescopic structure. In a preferred example, continue to refer to Figure 1 、 Figure 2 As shown, the bottom frame 31 includes a main frame 311 and a sub-frame 312. The sub-frame 312 is arranged inside the main frame 311, and a slide groove is provided on the inner side of the main frame 311. A matching portion corresponding to the slide groove is provided on the side wall of the sub-frame 312. The sliding fit between the main frame 311 and the sub-frame 312 is achieved through the fit between the matching portion and the slide groove. Preferably, a limit buckle is also provided on the sub-frame 312. When in use, the sub-frame 312 is pushed to move horizontally relative to the main frame 311 according to the patient's leg length to drive the thigh support part 41 and / or the calf support part 42 to expand and contract to adapt to the patient's leg length. After the sub-frame 312 moves relative to the main frame 311 to meet the leg length requirement or the leg length requirement, the sub-frame 312 is locked by the limit buckle to limit the position of the sub-frame 312, thereby avoiding the unnecessary risk of the surgery caused by the slipping of the sub-frame 312 during the operation.

[0047] Continue to refer to Figure 1 and Figure 2 As shown, the inner side of the sub-frame 312 is also provided with a screw 3121, a screw motor 3124 and a moving seat 3122 provided on the screw 3121. The screw motor 3124 drives the screw 3121 to rotate and then drives the moving seat 3122 to drive the calf support part 42 to move relative to the thigh support part 41 to support the patient's legs to maintain a flexed knee position. As a preferred embodiment of the present application, a waterproof shell is also provided on the outside of the screw motor 3124 to prevent physiological saline used for flushing during the operation from entering the screw motor 3124 and causing damage to the motor, thereby ensuring the normal use of the auxiliary device and also avoiding the risk of electric shock. Figure 1 and Figure 2 As shown, the thigh support portion 41 includes a first fixed section 411 and a first telescopic section 412. The first fixed section 411 has a first accommodating cavity disposed therein, and the first telescopic section 412 is disposed within the first accommodating cavity and can be telescoped into and out of the first accommodating cavity. The calf support portion 42 includes a second fixed section 421 and a second telescopic section 422. The second fixed section 421 has a second accommodating cavity disposed therein, and the second telescopic section 422 is disposed within the second accommodating cavity and can be telescoped into and out of the second accommodating cavity. The first fixed section 411 is hingedly connected to the main frame 311, and the first telescopic section 412 and the second telescopic section 422 are connected by the aforementioned ball joint 43. The second fixed section 421 is hingedly connected to the movable seat 3122. This structure can accommodate horizontal deflection of the calf support portion 42 relative to the thigh support portion 41, and can also accommodate the needs of patients of different heights and leg lengths, thereby improving the versatility and ease of use of the device.

[0048] As a preferred embodiment of this application, refer to Figure 5 As shown, the lower limb support mechanism 3 also includes a hip extension 44 connected to the thigh support 41 and a foot support 45 connected to the calf support 42. The hip extension 44 is used to support the patient's hip-femoral connection, and the foot support 45 is used to support the patient's foot and stabilize the ankle joint. The hip extension 44 provides support for the patient's hip-leg connection, improving comfort while preventing the edge of the thigh support from abutting the hip-leg connection for a long time, which could lead to poor blood circulation in the leg. The foot support 45 ensures the relative stability between the patient's foot and calf, preventing the swinging of the foot from causing the calf to deflect and affect the surgical procedure.

[0049] The technical solutions protected by this utility model are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of this utility model. Although the above description of this utility model has been provided in detail using general instructions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on this utility model. Therefore, such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An auxiliary device for anterior cruciate ligament reconstruction, characterized in that: It includes a fixing seat and a support structure arranged on the upper part of the fixing seat, a fixing mechanism is provided at the bottom of the fixing seat, and the fixing seat is detachably connected to the operating bed through the fixing mechanism, the support structure includes a lower limb support mechanism and a deflection drive assembly, the lower limb support mechanism includes a leg support member, and the leg support member is used to assist in maintaining a knee-flexed position, the lower limb support mechanism is rotatably connected to the fixing seat, and the deflection drive assembly is driven by the lower limb support mechanism and can drive the lower limb support mechanism to deflect toward the left and right sides of the human body relative to the fixing seat around an axis parallel to the length direction of the human body.

2. The anterior cruciate ligament reconstruction assisting device according to claim 1, wherein: The lower limb support mechanism includes a bottom frame, the leg support member is arranged on the upper part of the bottom frame, the lower part of the bottom frame is provided with a deflection axis, the fixed seat is provided with an axle seat corresponding to the deflection axis, the deflection axis corresponds to the axle seat, and the deflection drive assembly includes a deflection drive motor arranged on the fixed seat, and the deflection drive motor is matched with the deflection axis to drive the bottom frame to deflect relative to the fixed seat.

3. The anterior cruciate ligament reconstruction assisting device according to claim 2, wherein: It also includes a deflection limit mechanism, which includes a limit plate arranged on a fixed seat, a limit pin arranged on the bottom frame, and a limit fastener cooperating with the limit pin. The limit plate is arranged on one side or both sides of the bottom frame along the length direction of the human body, and the limit plate is provided with an arc-shaped channel adapted to the deflection motion trajectory of the bottom frame, and the limit pin passes through the arc-shaped channel and cooperates with the arc-shaped channel; the limit pin and the limit fastener have a locked state and a released state, in the released state, the limit pin can move along the arc-shaped channel with the deflection of the bottom frame, and in the locked state, the limit fastener is locked and cooperated with the limit pin and fixed on the limit plate.

4. The anterior cruciate ligament reconstruction assisting device according to claim 2, wherein: It also includes a deflection control mechanism, which includes an angle detection component and a controller connected to the angle detection component and the deflection drive motor respectively. The angle detection component is used to detect the deflection angle of the bottom frame and output angle information. The controller receives the angle information and controls the start and stop of the deflection drive motor.

5. The anterior cruciate ligament reconstruction assisting device according to claim 2, wherein: The leg support member includes a thigh support part and a calf support part, and the two ends of the thigh support part are respectively rotatably connected to the bottom frame and the calf support part. The lower limb support mechanism also includes a movable seat connected to the bottom frame, and the other end of the calf support part is hinged to the movable seat and can move relative to the bottom frame along the direction of the human body length with the movable seat.

6. The anterior cruciate ligament reconstruction assisting device according to claim 5, wherein: One end of the thigh support part is hinged to the bottom frame, and the other end of the thigh support part is connected to the end of the calf support part facing the thigh support part through a ball joint. The end of the calf support part facing the movable seat is provided with a connecting ring, which is rotatably connected to the end of the calf support part and can rotate relative to the calf support part around a vertical axis. The connecting ring is sleeved on the connecting shaft on the upper part of the movable seat and can move relative to the connecting shaft along the axial direction of the connecting shaft.

7. The anterior cruciate ligament reconstruction assisting device according to claim 6, wherein: The connecting shaft is also provided with an axial limiting device, and the axial limiting device is in limiting cooperation with the connecting ring.

8. The anterior cruciate ligament reconstruction assisting device according to claim 6, wherein: The thigh support portion includes a first fixed section and a first telescopic section, a first accommodating cavity is provided inside the first fixed section, the first telescopic section is provided in the first accommodating cavity and can be telescoped into and out of the first accommodating cavity, the calf support portion includes a second fixed section and a second telescopic section, a second accommodating cavity is provided inside the second fixed section, the second telescopic section is provided in the second accommodating cavity and can be telescoped into and out of the second accommodating cavity, the first fixed section is hinged to the bottom frame, the first telescopic section and the second telescopic section are connected via the spherical joint, and the second fixed section is hinged to the movable seat.

9. The anterior cruciate ligament reconstruction assisting device according to claim 6, wherein: The bottom frame includes a main frame and a sub-frame. The sub-frame is arranged inside the main frame and can move horizontally relative to the main frame. The thigh support part is hinged to the main frame, and the moving seat is arranged on the sub-frame.

10. The anterior cruciate ligament reconstruction assisting device according to claim 5, wherein: The lower limb support mechanism also includes a hip extension portion connected to the thigh support portion and a foot support connected to the calf support portion. The hip extension portion is used to support the human hip-femoral connection portion, and the foot support is used to support the human foot and fix the ankle joint.

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