A simulated varus / valgus stress pressurization device for lower limbs

Abstract

The present invention relates to the field of orthopedic medicine, and particularly relates to a device for simulating varus and valgus stress pressurization of the lower limb, which includes a bed board. A rotating mechanism is provided on the bed board. The rotating mechanism includes a rotating groove provided on the bed board, and two groups of stress components are symmetrically arranged in the rotating groove. Limiting mechanisms are provided on both sides of the rotating mechanism. By driving the stress components to slide in the rotating groove through the limiting mechanisms, in the present invention, when the patient applies a pulling force to the limiting mechanism with his own hand, the rotating mechanism can apply corresponding valgus stress to his own leg. At the same time, after applying the corresponding valgus stress, the joint in this stress state can be positioned in time, so as to assist the doctor in better finding the medial joint space during X-ray diagnosis. At the same time, during the process of the patient applying the valgus force, the auxiliary mechanism can correct the joint to be perpendicular to the X-ray, avoiding interference with the X-ray imaging caused by the rotation of the joint due to the valgus force.

Description

Technical Field

[0001] The present invention relates to the field of medical orthopedics, and particularly to a device for simulating varus and valgus stress compression of the lower limb Background Art

[0002] Anteromedial osteoarthritis (AMOA) is one of the best indications for unicompartmental knee arthroplasty. The manifestation of AMOA is the narrowing of the medial joint space. Clinically, we need to diagnose whether the tension of the medial collateral ligament can be restored through X-ray films to determine whether unicompartmental knee arthroplasty can be performed. Therefore, during the X-ray diagnosis by doctors, an eversion stress needs to be applied to the joint. At present, most hospitals do not have a device suitable for simulating eversion stress. In many hospitals, doctors often apply pressure by hand, and the following problems exist during this process: 1) Doctors' hands are exposed to X-rays, and one hand needs to apply pressure to the patient's calf while the other hand applies an opposite pressure to the patient's thigh to obtain an eversion stress radiograph. This not only increases the risk of radiation exposure for medical staff but also is not conducive to widespread implementation; 2) It is impossible to position the leg after applying stress. Doctors cannot continuously maintain the same force to support the patient's leg, and the repeatability of positioning diagnosis is poor; 3) Applying stress through doctors' hands cannot ensure that the knee joint is perpendicular to the X-ray. Usually, when the patient's leg is subjected to an eversion force, the single leg will involuntarily rotate slightly. At this time, doctors can only judge by the naked eye whether the leg rotates, which causes interference to the X-ray imaging

[0003] To solve the above problems, a device for simulating varus and valgus stress compression of the lower limb is proposed in the present invention Summary of the Invention

[0004] The object of the present invention is to overcome the problem that during the X-ray diagnosis before doctors judge whether unicompartmental knee arthroplasty is needed for anteromedial arthritis, it is impossible to reasonably and effectively apply an appropriate eversion force to the patient's leg to determine whether the tension of the collateral ligament can be restored. In the present invention, by applying a pulling force by the patient's own hand, an appropriate eversion stress can be applied to the patient's own leg. At the same time, after applying the appropriate eversion stress, the joint in this stress state can be positioned in time to assist doctors in better finding the joint space during X-ray diagnosis. At the same time, during the process of the patient applying an eversion force, the joint can be corrected to be perpendicular to the X-ray to avoid interference to the X-ray imaging caused by the rotation of the joint after being subjected to the eversion force

[0005] To solve the above technical problems, the present invention provides a simulated stress pressurizing device for internal and external rotation of the lower limbs, including a bed board. A rotating mechanism is provided on the bed board. The rotating mechanism includes a rotating groove provided on the bed board. Two groups of stress components are symmetrically provided in the rotating groove. Limiting mechanisms are provided on both sides of the rotating mechanism. The stress components are driven to slide in the rotating groove through the limiting mechanisms. An auxiliary mechanism is provided on one side of the rotating mechanism to correct the patient's legs through the auxiliary mechanism.

[0006] The stress component includes a placement block rotatably provided in the rotating groove. A placement groove is provided in the placement block. A thigh resistance rod is slidably provided on one side in the placement groove, and a calf resistance rod is slidably provided on the other side. The thigh resistance rod is connected to the inner wall of the placement groove through a first telescopic spring, and the calf resistance rod is connected to the inner wall of the placement groove through a second telescopic spring.

[0007] Preferably, the thigh resistance rod penetrates through the placement block, and a support block is provided on one side of the thigh resistance rod, and a stop block is provided on the other side. The stop block is connected to the inner wall of the placement groove through the first telescopic spring. A rotating shaft is fixedly provided on the stop block, and a first rubber sleeve is rotatably provided on the rotating shaft.

[0008] Preferably, the calf resistance rod penetrates through the placement block, and a connecting block is provided on one side of the calf resistance rod, and a retaining disc is provided on the other side. The retaining disc is connected to the inner wall of the placement groove through the second telescopic spring. A rotating shaft is fixedly provided on the connecting block, and a second rubber sleeve is rotatably provided on the rotating shaft.

[0009] Preferably, a rubber semi-cylinder is provided on the bed board. The rubber semi-cylinder is located in the middle of the placement block, and the first telescopic spring and the second telescopic spring are symmetric about the rubber semi-cylinder. Two joint placement grooves are provided on the rubber semi-cylinder.

[0010] Preferably, the limiting mechanism includes a sliding groove opened on the bed board. A sliding rod is slidably provided in the sliding groove. The sliding rod is connected to the inner wall of the sliding groove through a return spring. A rack is provided on the sliding rod, and the rack meshes with a gear tooth groove provided on the placement block. A handle assembly is also fixedly provided on the sliding rod.

[0011] Preferably, the handle assembly includes a plurality of limiting holes provided along the length direction of the inner wall of the sliding groove, and further includes a through hole opened on the sliding rod. A return spring is slidably provided in the through hole. A disc is sleeved on the return spring. One end face of the disc is connected to the sliding rod through a limiting spring.

[0012] Preferably, the auxiliary mechanism includes a placement cavity, a motor is fixedly arranged in the placement cavity, a screw rod is fixedly arranged at the output shaft end of the motor, a screw rod groove is arranged on the screw rod, and two auxiliary blocks are spirally arranged on the screw rod groove.

[0013] Preferably, a buffer cavity is formed on one end face of the auxiliary block, a pedal is slidably arranged in the buffer cavity, and the pedal is connected with the inner wall of the buffer cavity through a buffer spring.

[0014] Preferably, a communication hole is arranged in the buffer cavity, an air cushion is further arranged on the buffer cavity, and the communication hole is communicated with the air cushion.

[0015] Compared with the prior art, in the present invention, when a patient applies a pulling force to the limiting mechanism with his own hand, the turning mechanism can apply corresponding valgus stress to his own leg. At the same time, after applying the corresponding valgus stress, the joint in this stress state can be positioned in time, so as to assist the doctor in better finding the medial joint space during X-ray diagnosis. At the same time, during the process of the patient applying valgus force, the auxiliary mechanism can correct the joint to be perpendicular to the X-ray, avoiding interference with the X-ray imaging caused by the rotation of the joint under the valgus force. The present invention can also apply pressure to the limiting mechanism with the patient's hand to apply corresponding valgus stress to his own leg, and at the same time, the gap on the outer side of the patient's joint can also be checked. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of a device for simulating varus and valgus stress pressurization of the lower limb according to the present invention;

[0017] Figure 2 is a top view schematic diagram of a device for simulating varus and valgus stress pressurization of the lower limb according to the present invention;

[0018] Figure 3 is an isometric sectional view of a turning mechanism of a device for simulating varus and valgus stress pressurization of the lower limb according to the present invention;

[0019] Figure 4 is a Figure 2 isometric sectional view at A-A of a device for simulating varus and valgus stress pressurization of the lower limb according to the present invention;

[0020] Figure 5 is a Figure 2 isometric sectional view at B-B of a device for simulating varus and valgus stress pressurization of the lower limb according to the present invention.

[0021] The reference numerals are as follows:

[0022] Bed board 1, rotating mechanism 2, rotating groove 20, stress component 21, placement block 22, placement groove 220, thigh resistance rod 23, support block 231, rotating shaft 232, first rubber sleeve 233, stop block 234, first telescopic spring 235, calf resistance rod 24, connecting block 241, rotating shaft 242, second rubber sleeve 243, retaining disc 244, second telescopic spring 245, rubber semi-cylinder 25, joint placement groove 251, gear tooth groove 26, limiting mechanism 3, sliding groove 30, limiting hole 301, sliding rod 31, through hole 310, return spring 32, disc 33, limiting spring 34, auxiliary mechanism 4, placement cavity 40, motor 41, screw rod 42, screw rod groove 420, auxiliary block 43, buffer spring 431, communication hole 432, inflatable pad 433, pedal 434. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Next, in combination with the attached Figures 1-5 And the embodiments further illustrate the present invention:

[0025] In this embodiment, as shown in Figure 1 A stress pressurizing device for simulating internal and external rotation stress of the lower limbs includes a bed board 1. A rotating mechanism 2 is provided on the bed board 1. The rotating mechanism 2 includes a rotating groove 20 provided on the bed board 1. Two groups of stress components 21 are symmetrically provided in the rotating groove 20. Limiting mechanisms 3 are provided on both sides of the rotating mechanism 2. The stress components 21 are driven to slide in the rotating groove 20 through the limiting mechanisms 3. An auxiliary mechanism 4 is provided on one side of the rotating mechanism 2. The legs of the patient are corrected through the auxiliary mechanism 4. During the X-ray shooting and diagnosis process using the present invention, after the patient lies flat on the bed board 1, the legs are located on the rotating mechanism 2. Then, the left and right legs are respectively located on the stress components 21. After the legs are located on the auxiliary mechanism 4, when the patient's hands respectively apply a certain pulling force to the limiting mechanisms 3, this pulling force is transmitted to the patient's legs through the stress components 21, applying corresponding valgus stress to the patient's legs. After the internal joint is opened by a certain angle in this way, it is judged whether the joint space opens after applying a certain valgus stress to the patient's joint, so as to judge whether the ligaments of the internal joint are intact. When the gap opens by a certain angle, it indicates that the patient's ligaments are intact and unicompartmental replacement surgery can be performed. After applying the corresponding valgus stress, if the gap of the patient's internal joint cannot open, it indicates that the medial ligament at the patient's joint is damaged and cannot be treated by unicompartmental replacement surgery.

[0026] Further, the stress component 21 includes a placement block 22 rotatably arranged in the rotation groove 20. A placement groove 220 is provided in the placement block 22. A thigh resistance rod 23 is slidably arranged on one side in the placement groove 220, and a calf resistance rod 24 is slidably arranged on the other side. The thigh resistance rod 23 is connected to the inner wall of the placement groove 220 through a first telescopic spring 235, and the calf resistance rod 24 is connected to the inner wall of the placement groove 220 through a second telescopic spring 245. During the process of applying an eversion force to the patient's leg, a blocking force can be applied to the patient's thigh through the end of the thigh resistance rod 23, and a pushing force can be applied to the patient's calf through the end of the calf resistance rod 24. In this way, an eversion stress is applied to the patient's leg. During this process, the auxiliary mechanism 4 can support the patient's foot to a certain extent to prevent the leg from rotating during the application of the eversion stress to the leg, thereby preventing the joint bone from rotating, and thus preventing the bone shadow from repeating under X-ray. And during this process, when the eversion stress reaches a certain value, the limiting mechanism 3 can timely limit the value of this eversion stress and maintain it for a certain period of time, which is convenient for doctors to take X-ray pictures.

[0027] First of all, it should be noted that in the prior art, during the X-ray film diagnosis before doctors judge whether a unicompartmental knee arthroplasty is needed, when applying a corresponding eversion force to the patient's leg to judge whether the collateral ligament tension can be restored, during the process of applying an eversion stress to the patient's leg, the doctor's hands are exposed to the X-ray, there is a safety hazard of being irradiated, and at the same time, it is impossible to maintain a certain value of the corresponding eversion force for a certain period of time, resulting in poor repeatable positioning diagnosis effect. And during the process of applying the eversion stress, it is impossible to ensure that the patient's knee joint is perpendicular to the X-ray in the anteroposterior position.

[0028] In the present invention, by the patient's own hand applying a pulling force to the limiting mechanism 3, a corresponding eversion stress can be applied to his own leg through the rotating mechanism 2. At the same time, after applying the corresponding eversion stress, the joint in this stress state can be positioned in time, so as to assist the doctor to better find the medial joint space during X-ray diagnosis. At the same time, during the process of the patient applying the eversion force, the auxiliary mechanism 4 can correct the joint anteroposterior position perpendicular to the X-ray to avoid interference with the X-ray imaging caused by the rotation of the joint under the eversion force.

[0029] As a further effect, the present invention can also apply a pressure to the limiting mechanism 3 by the patient's hand to apply a corresponding eversion stress to his own leg, and at the same time, the joint lateral space of the patient can also be checked.

[0030] In one embodiment, referring to Figures 2-3As shown, the thigh resistance rod 23 passes through the placement block 22. On one side of the thigh resistance rod 23, there is a support block 231, and on the other side, there is a stop block 234. The stop block 234 is connected to the inner wall of the placement groove 220 through a first telescopic spring 235. A rotating shaft 232 is fixedly provided on the stop block 234, and a first rubber sleeve 233 is rotatably provided on the rotating shaft 232. During use, the first rubber sleeve 233 is in contact with the outer side of the patient's thigh. Then, during the rotation of the placement block 22, since the first rubber sleeve 233 is blocked by the outer side of the patient's thigh, the first telescopic spring 235 is subjected to a certain tensile force, and the magnitude of this tensile force is the magnitude of the blocking force of the first rubber sleeve 233 on the patient's thigh.

[0031] In one embodiment, referring to as Figures 2-3 As shown, the calf resistance rod 24 passes through the placement block 22. On one side of the calf resistance rod 24, there is a connection block 241, and on the other side, there is a stop plate 244. The stop plate 244 is connected to the inner wall of the placement groove 220 through a second telescopic spring 245. The second telescopic spring 245 and the first telescopic spring 235 preferably have the same elastic coefficient under the same vertical size. A rotating shaft 242 is fixedly provided on the connection block 241, and a second rubber sleeve 243 is rotatably provided on the rotating shaft 242. During use, the second rubber sleeve 243 is in contact with the inner side of the patient's calf. Then, during the rotation of the placement block 22, since the second rubber sleeve 243 is blocked by the inner wall of the patient's calf, the second telescopic spring 245 is subjected to a certain compressive force, and this compressive force is the thrust of the second rubber sleeve 243 on the patient's calf. By applying a blocking force to the outer side of the patient's thigh by the first telescopic spring 235 and a thrust to the inner side of the patient's calf by the second telescopic spring 245 during the rotation of the placement block 22, the patient receives two opposite stresses respectively above and below the joint center point, thereby forming an eversion stress at the joint part, and judging whether the medial joint space can open a certain angle in this way.

[0032] In an alternative embodiment, the first rubber sleeve 233 can be in contact with the inner side of the patient's thigh, and the second rubber sleeve 243 can be in contact with the outer side of the patient's calf. In this way, during the reverse rotation of the placement block 22, the inner wall of the patient's thigh is blocked by the first rubber sleeve 233, and a certain thrust is applied to the outer side of the calf by the second rubber sleeve 243. At this time, the patient is subjected to an inversion stress with the joint center, thereby assisting the doctor to check the gap of the outer joint and whether the lateral ligament is damaged.

[0033] In a preferred embodiment, referring to as Figures 1-2As shown, a rubber semi-cylinder 25 is provided on the bed board 1. The rubber semi-cylinder 25 is located in the middle of the placement block 22, and the first telescopic spring 235 and the second telescopic spring 245 are symmetric about the rubber semi-cylinder 25. Two joint placement grooves 251 are provided on the rubber semi-cylinder 25. During use, the joints of the patient can be respectively located on the two joint placement grooves 251. By symmetrically arranging the first telescopic spring 235 and the second telescopic spring 245 about the rubber semi-cylinder 25 and selecting the same elastic coefficient, when the first telescopic spring 235 and 255 convert the elastic force into the blocking force on the thigh and the pulling force on the lower leg, the thigh and the lower leg take the bone joint as the center point, and the force on both sides is balanced, so as to achieve the force balance of the joint and avoid the swinging of the leg when the forces on both sides of the joint are inconsistent.

[0034] In this embodiment, referring to Figure 2 and Figure 4 As shown, the limiting mechanism 3 includes a sliding groove 30 opened on the bed board 1. A sliding rod 31 is slidably arranged in the sliding groove 30. The sliding rod 31 is connected with the inner wall of the sliding groove 30 through a return spring 32. A rack 311 is provided on the sliding rod 31. The rack 311 meshes with a gear tooth groove 26 provided on the placement block 22. A handle assembly is also fixedly provided on the sliding rod 31. The patient can apply a pulling force to the sliding rod 31 by holding the handle assembly, driving the sliding rod 31 to slide in the sliding groove 30. During the sliding process of the sliding groove 30, through the meshing of the gear tooth groove 26 and the rack 311, the placement block 22 is driven to rotate, so as to apply an eversion stress to the patient's leg.

[0035] Furthermore, referring to Figure 2 and Figure 4 As shown, the handle assembly includes a plurality of limiting holes 301 arranged along the length direction of the inner wall of the sliding groove 30, and further includes a through hole 310 opened on the sliding rod 31. A return spring 32 is slidably arranged in the through hole 310. A disc 33 is sleeved on the return spring 32. One end face of the disc 33 is connected with the sliding rod 31 through a limiting spring 34. During the process that the patient manually pulls the return spring 32 to apply a certain pulling force to the sliding rod 31, and then applies a corresponding eversion stress to the patient's leg through the rotating mechanism 2, after the gap on the outer side of the patient's joint opens, at this time, the patient can manually press the disc 33, so that the disc 33 drives the return spring 32 to slide in the through hole 310. At this time, one end of the return spring 32 enters into the limiting hole 301, and at this time, the sliding rod 31 can be limited, so as to limit the rotating mechanism 2, so that the eversion stress applied by the rotating mechanism 2 to the patient can be maintained for a certain period of time, so as to assist the doctor to find the gap on the outer side of the joint and perform imaging during the X-ray examination.

[0036] In this embodiment, referring to Figure 2 and Figure 5As shown, the auxiliary mechanism 4 includes an installation cavity 40. A motor 41 is fixedly arranged in the installation cavity 40. A screw rod 42 is fixedly arranged at the output shaft end of the motor 41. A screw rod groove 420 is arranged on the screw rod 42. Two auxiliary blocks 43 are spirally arranged on the screw rod groove 420. Preferably, the screw rod groove 420 on the screw rod 42 is preferably two threads with opposite spiral directions. Through this implementation method, after the patient's feet step on the auxiliary blocks 43 respectively, when adjusting the distance between the two auxiliary blocks 43 in the early stage, by starting the motor 41, the motor 41 rotates to drive the screw rod 42 to rotate. The screw rod 42 rotates to drive the two auxiliary blocks 43 to move away from or close to each other through the screw rod groove 420, so as to adjust the gap between the two auxiliary blocks 43, so as to assist the distance between the two legs.

[0037] In this embodiment, referring to Figure 1 and Figure 5 As shown, a buffer cavity 430 is opened on one end face of the auxiliary block 43. A pedal 434 is slidably arranged in the buffer cavity 430. The pedal 434 is connected with the inner wall of the buffer cavity 430 through a buffer spring 431. The patient can step on the pedal 434 with the foot. Under the action of the stepping force of the foot, the pedal 434 slides into the buffer cavity 430. At this time, the buffer spring 431 is subjected to a compression force, so that the patient's feet are subjected to a certain extrusion force. Under the action of this extrusion force, when the patient's legs are subjected to an eversion stress, the legs will not rotate, avoiding that after the legs rotate, the joints cannot be perpendicular to the X-ray.

[0038] Furthermore, referring to Figure 1 and Figure 5 As shown, a communication hole 432 is arranged in the buffer cavity 430. An air cushion 433 is also arranged on the buffer cavity 430. The communication hole 432 is communicated with the air cushion 433. Preferably, the pedal 434 is slidably and sealingly connected with the buffer cavity 430. During the process of the pedal 434 sliding into the buffer cavity 430, the gas in the buffer cavity 430 is transmitted to the air cushion 433 through the communication hole 432. Then, after the air cushion 433 expands, it can clamp the patient's ankle, avoiding damage to the ankle when the legs are subjected to an eversion stress and the angle is subjected to a vertical force. By wrapping and clamping the ankle with the air cushion 433, damage to the ankle can be avoided;

[0039] In another alternative embodiment of the present invention, when the patient's hands are weak or the patient is inconvenient to move, at this time, the first rubber sleeve 233 and the second rubber sleeve 243 can be placed on the outer sides of the patient's thighs and calves. At this time, both of them give a blocking force to the legs. At this time, by starting the motor 41, the motor 41 starts to drive the screw rod 42 to rotate. The screw rod 42 rotates to drive the two auxiliary blocks 43 to move away from each other. At this time, the auxiliary blocks 43 apply a thrust force to the patient's feet, and the first rubber sleeve 233 and the second rubber sleeve 243 apply a blocking force to the patient's legs. Through this implementation method, an eversion stress can be applied to the legs of the patient who is weak or inconvenient for surgery.

[0040] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A simulated stress pressurizing device for varus and valgus of lower limbs, comprising a bed board (1), characterized in that: A rotating mechanism (2) is provided on the bed board (1). The rotating mechanism (2) includes a rotating groove (20) provided on the bed board (1). Two groups of stress components (21) are symmetrically provided in the rotating groove (20). Limiting mechanisms (3) are provided on both sides of the rotating mechanism (2). The stress components (21) are driven to slide in the rotating groove (20) through the limiting mechanisms (3). An auxiliary mechanism (4) is provided on one side of the rotating mechanism (2). The legs of the patient are corrected through the auxiliary mechanism (4). The stress component (21) includes a placement block (22) rotatably provided in the rotating groove (20). A placement groove (220) is provided in the placement block (22). A thigh resistance rod (23) is slidably provided on one side in the placement groove (220), and a calf resistance rod (24) is slidably provided on the other side. The thigh resistance rod (23) is connected to the inner wall of the placement groove (220) through a first telescopic spring (235). The calf resistance rod (24) is connected to the inner wall of the placement groove (220) through a second telescopic spring (245). A rubber semi-cylinder (25) is provided on the bed board (1). The rubber semi-cylinder (25) is located in the middle of the placement block (22). The first telescopic spring (235) and the second telescopic spring (245) are symmetric about the rubber semi-cylinder (25). Two joint placement grooves (251) are provided on the rubber semi-cylinder (25). The limiting mechanism (3) includes a sliding groove (30) opened on the bed board (1). A sliding rod (31) is slidably provided in the sliding groove (30). The sliding rod (31) is connected to the inner wall of the sliding groove (30) through a return spring (32). A rack (311) is provided on the sliding rod (31). The rack (311) is engaged with a gear tooth groove (26) provided on the placement block (22). A handle assembly is also fixedly provided on the sliding rod (31). The handle assembly includes a plurality of limiting holes (301) provided along the length direction of the inner wall of the sliding groove (30), and further includes a through hole (310) opened on the sliding rod (31). A return spring (32) is slidably provided in the through hole (310). A disc (33) is sleeved on the return spring (32). One end face of the disc (33) is connected to the sliding rod (31) through a limiting spring (34).

2. The simulated varus / valgus stress pressurizing device for lower limbs according to claim 1, characterized in that: The thigh resistance rod (23) penetrates through the placement block (22). A support block (231) is provided on one side of the thigh resistance rod (23), and a stop block (234) is provided on the other side. The stop block (234) is connected to the inner wall of the placement groove (220) through the first telescopic spring (235). A rotating shaft (232) is fixedly provided on the stop block (234). A first rubber sleeve (233) is rotatably provided on the rotating shaft (232).

3. The simulated varus / valgus stress pressurizing device for lower limbs according to claim 1, wherein: The calf resistance rod (24) passes through the placement block (22). A connecting block (241) is provided on one side of the calf resistance rod (24), and a stop disc (244) is provided on the other side. The stop disc (244) is connected to the inner wall of the placement groove (220) through the second telescopic spring (245). A rotating shaft (242) is fixedly provided on the connecting block (241), and a second rubber sleeve (243) is rotatably provided on the rotating shaft (242).

4. The simulated lower limb varus / valgus stress pressurizing device according to claim 1, wherein: The auxiliary mechanism (4) includes a placement cavity (40). A motor (41) is fixedly provided in the placement cavity (40). A screw rod (42) is fixedly provided at the output shaft end of the motor (41). A screw rod groove (420) is provided on the screw rod (42), and two auxiliary blocks (43) are spirally provided on the screw rod groove (420).

5. The simulated lower limb varus / valgus stress pressurizing device according to claim 4, characterized in that: A buffer cavity (430) is formed on one end face of the auxiliary block (43). A pedal (434) is slidably provided in the buffer cavity (430). The pedal (434) is connected to the inner wall of the buffer cavity (430) through a buffer spring (431).

6. The simulated varus / valgus stress pressurizing device for lower limbs according to claim 5, characterized in that: A communication hole (432) is provided in the buffer cavity (430). An air cushion (433) is further provided on the buffer cavity (430). The communication hole (432) is communicated with the air cushion (433).

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