Knee joint prosthesis and knee joint prosthesis system

Abstract

The utility model relates to a knee joint prosthesis and a knee joint prosthesis system.The knee joint prosthesis comprises a prosthesis body, an induction stator and a circuit board assembly used for collecting pressure signals are arranged in the prosthesis body, and an induction rotor which is in electromagnetic induction with the induction stator is rotatably arranged in the induction stator; the induction stator is provided with an induction rotor, the induction rotor is provided with an automatic gyroscope, the automatic gyroscope drives the induction rotor to rotate, the induction stator is provided with a lead, the circuit board assembly is provided with a rechargeable battery, and the induction stator is electrically connected with the rechargeable battery through the lead. According to the knee joint prosthesis, the automatic gyroscope type knee joint prosthesis is adopted, the induction rotor is driven to rotate through the automatic gyroscope, the structure is simple and reliable, no complex gear transmission and connecting rod transmission structure exists, the load borne by the structure is small, the knee joint prosthesis is not prone to failure after being used for a long time, and the service life of the knee joint prosthesis is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a knee joint prosthesis and a knee joint prosthesis system. Background Art

[0002] The knee joint is one of the largest and most important joints in the human body. Knee joint lesions will seriously affect the patient's mobility and reduce their quality of life. For some seriously diseased knee joints, total knee arthroplasty (TKA) technology can be used. Total knee arthroplasty can maximize the reconstruction of knee joint function and improve the patient's quality of life. It is an important surgical solution for treating severe knee joint lesions.

[0003] After total knee replacement surgery, problems such as soft tissue imbalance or inaccurate alignment caused by the knee prosthesis may cause patient pain, joint stiffness, limited movement, and joint instability. Therefore, it is necessary to obtain the stress conditions of the knee prosthesis during use. The knee prosthesis must be able to actively collect mechanical parameters, and the collection of mechanical parameters requires relevant devices and power supplies. In order to provide power to the knee joint, the prior art provides an automatic power generation device in the knee prosthesis. The power generation devices of the knee prosthesis in the prior art all use transmission structures such as gears or connecting rods to achieve power generation, and these transmission mechanisms all achieve rotational power generation through the rotational movement between the femur and the tibia. The rotation lock between the femur and the tibia generates a large force, that is, a large workload, and is prone to failure after long-term use, resulting in a short life of the knee prosthesis. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a knee joint prosthesis, which can increase the service life.

[0005] To achieve the above-mentioned purpose, the utility model provides a knee joint prosthesis, including a prosthesis body, wherein an induction stator and a circuit board assembly for collecting pressure signals are arranged in the prosthesis body, an induction rotor for electromagnetic induction with the induction stator is rotatably arranged in the induction stator, an automatic rotor is arranged on the induction rotor, and the automatic rotor drives the induction rotor to rotate, a lead is arranged on the induction stator, a rechargeable battery is arranged on the circuit board assembly, and the lead electrically connects the induction stator with the rechargeable battery.

[0006] In one embodiment of the utility model, the circuit board assembly includes a pressure sensor, the prosthesis body includes a prosthesis upper cover and a prosthesis lower cover, the pressure sensor includes a fixed end and a measuring end, the measuring end is in contact with the prosthesis upper cover, and the fixed end is in contact with the prosthesis lower cover.

[0007] In one embodiment of the utility model, a first force-bearing surface and a second force-bearing surface are provided on the upper cover of the prosthesis, a third force-bearing surface is provided on the lower cover of the prosthesis, and at least two groups of pressure sensors are provided, one group of pressure sensors is provided between the first force-bearing surface and the third force-bearing surface, and the other group of pressure sensors is provided between the second force-bearing surface and the third force-bearing surface.

[0008] In one embodiment of the present invention, the symmetry plane between the first force-bearing surface and the second force-bearing surface is a first plane, and each group of the pressure sensors is symmetrically arranged about the first plane.

[0009] In one embodiment of the utility model, a mounting cavity is provided on the upper cover of the prosthesis, and the induction stator is arranged in the mounting cavity.

[0010] In one embodiment of the utility model, it also includes a locking bolt. The circuit board assembly is provided with a plurality of mounting holes. The prosthesis upper cover is provided with mounting columns corresponding to the mounting holes. The locking bolt passes through the mounting holes and cooperates with the mounting columns to connect the circuit board assembly with the prosthesis upper cover.

[0011] In one embodiment of the utility model, a rotating shaft is provided on the induction rotor, a first mounting portion is provided on the prosthesis upper cover, a second mounting portion is provided on the circuit board assembly, one end of the rotating shaft is rotatably provided on the first mounting portion, and the other end of the rotating shaft is rotatably provided on the second mounting portion.

[0012] In one embodiment of the utility model, a receiving cavity is formed between the prosthesis lower cover and the circuit board assembly, the automatic rotor is arranged on one end of the rotating shaft close to the circuit board assembly, and the automatic rotor is located in the receiving cavity.

[0013] In one embodiment of the present invention, a controller and a wireless transmission module are provided on the circuit board assembly, and the controller is communicatively connected with both the pressure sensor and the wireless transmission module.

[0014] On the other hand, a knee joint prosthesis system is provided, comprising the above-mentioned knee joint prosthesis and a terminal, wherein the terminal is communicatively connected with the knee joint prosthesis.

[0015] The above technical solution of the utility model has the following advantages compared with the prior art:

[0016] (1) The knee joint prosthesis described in the utility model adopts an automatic rotor type knee joint prosthesis, which drives the induction rotor to rotate through the automatic rotor. The structure is simple and reliable, without complicated gear transmission and connecting rod transmission structure. The load borne by the structure is small, and it is not easy to fail after long-term use, which greatly improves the service life of the knee joint prosthesis.

[0017] (2) The knee joint prosthesis system described in the utility model includes a terminal. The wireless transmission module on the knee joint prosthesis can transmit the pressure value to the terminal, so that the pressure value can be visualized and displayed through the terminal, which is convenient for medical staff to evaluate the user's condition and improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the exploded structure of the knee joint prosthesis of the utility model;

[0020] Figure 2 It is a three-dimensional cross-sectional view of the knee joint prosthesis of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the prosthesis upper cover of the knee joint prosthesis of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a knee joint prosthesis of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the knee joint prosthesis system of the utility model.

[0024] Description of the Figures in the Specification:

[0025] 1. Prosthesis body; 2. Induction stator; 3. Circuit board assembly; 4. Induction rotor; 5. Automatic rotor; 6. Lead wire; 7. Rechargeable battery; 8. Pressure sensor; 9. Prosthesis upper cover; 10. Prosthesis lower cover; 11. Fixed end; 12. Measuring end; 13. First force-bearing surface; 14. Second force-bearing surface; 15. Third force-bearing surface; 16. Mounting cavity; 17. Locking bolt; 18. Mounting hole; 19. Mounting column; 20. Rotating shaft; 21. First mounting part; 22. Second mounting part; 23. Accommodating cavity; 24. Controller; 25. Connecting column; 26. Bearing. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] Reference Figure 1 to Figure 5 As shown, the knee joint prosthesis of the utility model comprises a prosthesis body 1, wherein the prosthesis body 1 is provided with an induction stator 2 and a circuit board assembly 3 for collecting pressure signals, wherein the induction stator 2 is rotatably provided with an induction rotor 4 for electromagnetic induction therewith, wherein the induction rotor 4 is provided with an automatic rotor 5, wherein the automatic rotor 5 drives the induction rotor 4 to rotate, wherein the induction stator 2 is provided with a lead 6, wherein the circuit board assembly 3 is provided with a rechargeable battery 7, wherein the lead 6 electrically connects the induction stator 2 with the rechargeable battery 7.

[0029] The present application proposes a knee joint prosthesis, which can have a long service life, so that users can evaluate the pressure balance state of the knee joint. Specifically, the knee joint prosthesis includes a prosthesis body 1, and a circuit board assembly 3 for collecting pressure signals is arranged in the prosthesis body 1, that is, the force data of the knee joint prosthesis during use by the user is collected and analyzed through the circuit board assembly 3 to evaluate the pressure balance state of the user's knee joint. An induction rotor 4 and an induction stator 2 are arranged in the knee joint prosthesis, and the induction stator 2 and the induction rotor 4 generate electricity through electromagnetic induction, which is equivalent to a small generator, and the current generated by the induction rotor 4 and the induction stator 2 provides power to the circuit board assembly 3. Furthermore, the interior of the induction stator 2 is hollow to form a cylindrical cavity, and the induction rotor 4 is installed in the cylindrical cavity. The induction rotor 4 is coaxially arranged with the induction stator 2, wherein an automatic rotor 5 is arranged at one end of the induction rotor 4. The automatic rotor 5 is an eccentric weight that can rotate and is generally made of heavy metal, such as K gold, titanium alloy, etc., similar to the automatic rotor in a mechanical watch. The inertia of the user during movement drives the automatic rotor 5 to rotate, and the automatic rotor 5 is connected to the induction rotor 4. Therefore, the automatic rotor 5 drives the induction rotor 4 to rotate, and the rotating induction rotor 4 and the induction stator 2 generate current through electromagnetic induction. Since the induction stator 2 is provided with a lead 6, and the circuit board assembly 3 is provided with a rechargeable battery 7, the lead 6 on the induction stator 2 is electrically connected to the rechargeable battery 7, therefore, the current generated on the induction stator 2 flows into the rechargeable battery 7 through the lead 6 to charge the rechargeable battery 7, so as to ensure that the knee joint prosthesis can be in a working state for a long time, and the force data of the user's knee joint prosthesis is collected through the circuit board assembly 3. The charging device of the knee joint prosthesis in the prior art is implemented by means of complex gears and transmission rods, and these transmission mechanisms all realize rotational power generation through the rotational movement between the femur and the tibia. The rotation lock between the femur and the tibia generates a large force, that is, a large workload, and is prone to failure after long-term use, resulting in a short life of the knee joint prosthesis. The knee joint prosthesis of the present application adopts an automatic rotor type, in which the induction rotor 4 is driven to rotate by the automatic rotor 5. The structure is simple and reliable, without complex gear transmission and connecting rod transmission structures. The load borne by the structure is small, and it is not easy to fail after long-term use, which greatly improves the service life of the knee joint prosthesis.

[0030] In one embodiment, the circuit board assembly 3 includes a pressure sensor 8, the prosthesis body 1 includes a prosthesis upper cover 9 and a prosthesis lower cover 10, the pressure sensor 8 includes a fixed end 11 and a measuring end 12, the measuring end 12 is connected to the prosthesis upper cover 9, and the fixed end 11 is in contact with the prosthesis lower cover 10.

[0031] The circuit board component 3 collects and analyzes the force data of the knee joint prosthesis during use by the user. Specifically, Figure 1 and Figure 2 As shown, the circuit board assembly 3 includes a pressure sensor 8, and the pressure data is collected through the pressure sensor 8. Further, the prosthesis body 1 of the knee joint prosthesis includes a prosthesis upper cover 9 and a prosthesis lower cover 10, which are connected to each other and placed between the femur and the tibia to withstand the force between the tibia and the femur when the user walks. The femur is connected to the prosthesis upper cover 9, and the tibia is connected to the prosthesis lower cover 10, so the force between the femur and the tibia is transmitted between the prosthesis upper cover 9 and the prosthesis lower cover 10. Furthermore, the pressure sensor 8 includes a fixed end 11 and a measuring end 12. The fixed end 11 is in contact with the lower cover 10 of the prosthesis, and the measuring end 12 is in contact with the upper cover 9 of the prosthesis. When the user is walking, a force is generated between the femur and the tibia, and the deformation between the upper cover 9 of the prosthesis and the lower cover 10 of the prosthesis is transmitted to the measuring end 12 and the fixed end 11 of the pressure sensor 8. The relative change between the measuring end 12 and the fixed end 11 reflects the pressure, so as to realize the collection of pressure data. Furthermore, as Figure 3 As shown, corresponding connecting columns 25 may be provided on the prosthesis upper cover 9 and the prosthesis lower cover 10 , and the connecting columns 25 are abutted against the corresponding measuring ends 12 and the fixing ends 11 .

[0032] In one embodiment, a first force-bearing surface 13 and a second force-bearing surface 14 are provided on the prosthesis upper cover 9, a third force-bearing surface 15 is provided on the prosthesis lower cover 10, and at least two groups of pressure sensors 8 are provided, one group of pressure sensors is provided between the first force-bearing surface 13 and the third force-bearing surface 15, and the other group of pressure sensors is provided between the second force-bearing surface 14 and the third force-bearing surface 15.

[0033] like Figure 1 and Figure 2As shown, the upper cover 9 of the prosthesis is provided with a first force-bearing surface 13 and a second force-bearing surface 14, and the first force-bearing surface 13 and the second force-bearing surface 14 are in contact with the two osteotomy surfaces on the femur respectively; the lower cover 10 of the prosthesis is provided with a third force-bearing surface 15, and the third force-bearing surface 15 is in contact with the osteotomy surface on the tibia. When the knee joint prosthesis is in use, the force between the tibia and the femur is transmitted to between the upper cover 9 of the prosthesis and the lower cover 10 of the prosthesis, wherein the first force-bearing surface 13, the second force-bearing surface 14 and the third force-bearing surface 15 are the main force-bearing parts, therefore, the pressure sensor 8 should be set to the main force-bearing parts to obtain the most effective force data. Furthermore, a plurality of pressure sensors 8 are provided, and the pressure sensors 8 are divided into at least two groups. Preferably, the pressure sensors 8 are divided into two groups, and the number of pressure sensors in each group is the same and the distribution is symmetrical, so as to improve the uniformity of pressure data collection. One group of pressure sensors is arranged between the first force-bearing surface 13 and the third force-bearing surface 15, and the other group of pressure sensors is arranged between the second force-bearing surface 14 and the third force-bearing surface 15 to obtain force data. The data of the two groups of pressure sensors can be compared to analyze whether the pressure at the knee joint is in a balanced state, so as to facilitate the evaluation of the user's knee joint condition.

[0034] In one embodiment, the symmetry plane between the first force-bearing surface 13 and the second force-bearing surface 14 is a first plane, and each group of the pressure sensors 8 is symmetrically arranged with respect to the first plane.

[0035] The first force-bearing surface 13 and the second force-bearing surface 14 on the prosthesis upper cover 9 are arranged symmetrically, so the symmetry plane between the first force-bearing surface 13 and the second force-bearing surface 14 is defined as a first plane (not shown in the figure). Figure 1 As shown, there are six pressure sensors in total, three pressure sensors in each group, and two groups of pressure sensors in total. The two groups of pressure sensors are symmetrically arranged about the first plane, so that the pressure values ​​collected by the pressure sensors 8 are relatively comparable, so as to effectively evaluate the user's knee joint status. In addition, the position of each group of pressure sensors 8 on the circuit board is set according to actual needs, and the distance between two adjacent pressure sensors 8 is set according to actual needs, and the number of pressure sensors is set according to actual needs, and each group of pressure sensors has at least three, so as to improve the validity of the collected data.

[0036] In one embodiment, a mounting cavity 16 is disposed on the prosthetic upper cover 9 , and the induction stator 2 is disposed in the mounting cavity 16 .

[0037] like Figure 2 As shown, a mounting cavity 16 is provided on the prosthesis upper cover 9 , and the mounting cavity 16 is a cylindrical cavity, so that the induction stator 2 can be arranged in the mounting cavity 16 .

[0038] In one embodiment, it also includes a locking bolt 17, a plurality of mounting holes 18 are provided on the circuit board assembly 3, and mounting columns 19 corresponding to the mounting holes 18 are provided on the prosthesis upper cover 9. The locking bolt 17 passes through the mounting holes 18 and cooperates with the mounting columns 19 to connect the circuit board assembly 3 with the prosthesis upper cover 9.

[0039] like Figure 2 As shown, the knee joint prosthesis further includes a locking bolt 17 to fix the circuit board assembly 3 on the prosthesis upper cover 9. Specifically, a plurality of mounting holes 18 are provided on the circuit board assembly 3, and a mounting column 19 is provided on the prosthesis upper cover 9. The mounting holes 18 correspond to the mounting columns 19 one by one, and the mounting columns 19 are provided with threaded holes. The locking bolt 17 passes through the mounting holes 18 on the circuit board and is matched and locked with the threaded holes on the mounting columns 19 to fix the circuit board assembly 3 on the prosthesis upper cover 9 to prevent the circuit board assembly 3 from loosening.

[0040] In one embodiment, a rotating shaft 20 is provided on the induction rotor 4, a first mounting portion 21 is provided on the prosthetic upper cover 9, a second mounting portion 22 is provided on the circuit board assembly 3, one end of the rotating shaft 20 is rotatably provided on the first mounting portion 21, and the other end of the rotating shaft 20 is rotatably provided on the second mounting portion 22.

[0041] like Figure 2 As shown, the induction rotor 4 performs a rotational motion, and therefore, a rotating shaft 20 is provided on the induction rotor 4. A first mounting portion 21 is provided on the dummy upper cover 9, and a second mounting portion 22 is provided on the circuit board assembly 3. One end of the rotating shaft 20 is rotatably provided on the first mounting portion 21, and the other end of the rotating shaft 20 is rotatably provided on the second mounting portion 22. Specifically, a bearing 26 is provided between the first mounting portion 21 and one end of the rotating shaft 20 and between the second mounting portion 22 and the other end of the rotating shaft 20 to reduce the rotational friction of the induction rotor 4, improve the rotational efficiency, and thus improve the power generation efficiency.

[0042] In one embodiment, a receiving cavity 23 is formed between the prosthetic lower cover 10 and the circuit board assembly 3 , and the rotor 5 is disposed on one end of the rotating shaft 20 close to the circuit board assembly 3 , and the rotor 5 is located in the receiving cavity 23 .

[0043] The automatic rotor 5 rotates by its inertia when the user is walking, so it is necessary to provide a space for the rotation of the automatic rotor 5. After the circuit board assembly 3 is installed on the prosthesis upper cover 9 and the prosthesis upper cover 9 is connected to the prosthesis lower cover 10, as shown in FIG. Figure 2As shown, a receiving cavity 23 is formed between the prosthesis lower cover 10 and the circuit board assembly 3, and the automatic rotor 5 is installed on one end of the rotating shaft 20 close to the circuit board assembly 3. Therefore, the automatic rotor 5 is located in the receiving cavity 23, and the rotation of the automatic rotor 5 is accommodated by the receiving cavity 23.

[0044] In one embodiment, a controller 24 and a wireless transmission module are disposed on the circuit board assembly 3 , and the controller 24 is communicatively connected with both the pressure sensor 8 and the wireless transmission module.

[0045] like Figure 2 As shown, the circuit board assembly 3 is provided with a controller 24 and a wireless transmission module (not shown in the figure), and the controller 24 is used to receive the pressure signal from the pressure sensor 8 and perform corresponding processing and storage operations on the pressure signal. The wireless transmission module is used to transmit the stored pressure value for reference by medical staff to evaluate the user's knee joint status, or to perform operations such as visual display of the pressure value.

[0046] Embodiment 2

[0047] A knee joint prosthesis system is provided, comprising a knee joint prosthesis and a terminal, wherein the terminal is communicatively connected with the knee joint prosthesis. The knee joint prosthesis comprises a prosthesis body 1, wherein an induction stator 2 and a circuit board assembly 3 for collecting pressure signals are arranged in the prosthesis body 1, wherein an induction rotor 4 for electromagnetic induction is rotatably arranged in the induction stator 2, wherein an automatic rotor 5 is arranged on the induction rotor 4, wherein the automatic rotor 5 drives the induction rotor 4 to rotate, wherein a lead wire 6 is arranged on the induction stator 2, wherein a rechargeable battery 7 is arranged on the circuit board assembly 3, wherein the lead wire 6 electrically connects the induction stator 2 with the rechargeable battery 7.

[0048] The knee joint prosthesis of the knee joint prosthesis system of the present application adopts an automatic rotor type knee joint prosthesis, which drives the induction rotor 4 to rotate through the automatic rotor 5. The structure is simple and reliable, and there is no complicated gear transmission and connecting rod transmission structure. The load borne by the structure is small, and it is not easy to fail after long-term use, which greatly improves the service life of the knee joint prosthesis.

[0049] In addition, if Figure 5 As shown, the knee prosthesis system of the present application includes a terminal, such as a smart terminal such as a computer, a tablet, a mobile phone, and a smart watch. The wireless transmission module on the knee prosthesis can transmit the pressure value to the terminal, so that the pressure value can be visualized and displayed through the terminal, which is convenient for medical staff to evaluate the user's condition and improves convenience of use.

[0050] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A knee joint prosthesis, characterized in that: The invention comprises a prosthesis body (1), wherein an induction stator (2) and a circuit board assembly (3) for collecting pressure signals are arranged in the prosthesis body (1), an induction rotor (4) for electromagnetic induction with the induction stator (2) is rotatably arranged in the induction stator (2), an automatic rotor (5) is arranged on the induction rotor (4), and the automatic rotor (5) drives the induction rotor (4) to rotate, a lead wire (6) is arranged on the induction stator (2), a rechargeable battery (7) is arranged on the circuit board assembly (3), and the lead wire (6) electrically connects the induction stator (2) and the rechargeable battery (7).

2. The knee joint prosthesis according to claim 1, characterized in that: The circuit board assembly (3) includes a pressure sensor (8), the prosthesis body (1) includes a prosthesis upper cover (9) and a prosthesis lower cover (10), the pressure sensor (8) includes a fixed end (11) and a measuring end (12), the measuring end (12) is in contact with the prosthesis upper cover (9), and the fixed end (11) is in contact with the prosthesis lower cover (10).

3. The knee joint prosthesis according to claim 2, characterized in that: The prosthesis upper cover (9) is provided with a first force-bearing surface (13) and a second force-bearing surface (14), the prosthesis lower cover (10) is provided with a third force-bearing surface (15), and at least two groups of pressure sensors (8) are provided, wherein one group of pressure sensors (8) is provided between the first force-bearing surface (13) and the third force-bearing surface (15), and the other group of pressure sensors (8) is provided between the second force-bearing surface (14) and the third force-bearing surface (15).

4. The knee joint prosthesis according to claim 3, characterized in that: The symmetry plane between the first force-bearing surface (13) and the second force-bearing surface (14) is a first plane, and each group of pressure sensors (8) is arranged symmetrically with respect to the first plane.

5. The knee joint prosthesis according to claim 2, characterized in that: The prosthesis upper cover (9) is provided with a mounting cavity (16), and the induction stator (2) is arranged in the mounting cavity (16).

6. The knee joint prosthesis according to claim 2, characterized in that: It also includes a locking bolt (17), the circuit board assembly (3) is provided with a plurality of mounting holes (18), the prosthesis upper cover (9) is provided with mounting columns (19) corresponding to the mounting holes (18), and the locking bolt (17) passes through the mounting holes (18) and cooperates with the mounting columns (19) to connect the circuit board assembly (3) with the prosthesis upper cover (9).

7. The knee joint prosthesis according to claim 2, characterized in that: The induction rotor (4) is provided with a rotating shaft (20), the prosthetic upper cover (9) is provided with a first mounting portion (21), and the circuit board assembly (3) is provided with a second mounting portion (22); one end of the rotating shaft (20) is rotatably provided on the first mounting portion (21), and the other end of the rotating shaft (20) is rotatably provided on the second mounting portion (22).

8. The knee joint prosthesis according to claim 7, characterized in that: An accommodating cavity (23) is formed between the prosthesis lower cover (10) and the circuit board assembly (3); the automatic rotor (5) is arranged on one end of the rotating shaft (20) close to the circuit board assembly (3); and the automatic rotor (5) is located in the accommodating cavity (23).

9. The knee joint prosthesis according to any one of claims 2 to 8, characterized in that: The circuit board assembly (3) is provided with a controller (24) and a wireless transmission module, and the controller (24) is communicatively connected with both the pressure sensor (8) and the wireless transmission module.

10. A knee joint prosthesis system comprising the knee joint prosthesis according to any one of claims 1 to 9, characterized in that: It also includes a terminal, which is communicatively connected to the knee joint prosthesis.

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