A CFR-PEEK material containing universal ball shaft type anti-dislocation type tumor knee joint prosthesis

Abstract

The application provides a universal ball shaft type anti-dislocation tumor knee joint prosthesis containing CFR-PEEK material and belongs to the technical field of medical devices. The prosthesis comprises a tibial pad installed in the middle part of the prosthesis, a connecting disc installed at the bottom of the tibial pad, and a universal ball shaft installed at the middle position of the inner wall of the prosthesis. An auxiliary anti-dislocation assembly is used for limiting the universal ball shaft and is connected with the connecting disc. The auxiliary anti-dislocation assembly is arranged, some reinforcing parts are cancelled during the installation of the upper and lower assemblies of the prosthesis, on one hand, the redundant steps during disassembly and assembly are reduced, the flexibility and convenience of disassembly and assembly are improved, on the other hand, the stability of the middle position of the prosthesis is not reduced due to the loosening of the reinforcing parts after a period of use, and the normal use of the knee joint prosthesis is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a CFR-PEEK material containing universal ball shaft type anti-dislocation tumor knee joint prosthesis. BACKGROUND

[0002] The distal femur is a common site for malignant bone tumors. Currently, the main treatment for malignant bone tumors in this area is to remove the diseased tumor segment, and then to reconstruct the large bone defect with an artificial hinge knee joint prosthesis. The commercially available distal femur tumor knee joint prosthesis is more of a simple hinge and a rotating hinge in use, and a small part of the prosthesis realizes fine adjustment of different angles through the setting of a universal ball shaft in the middle to better adapt to the coordination of the body.

[0003] However, when using the universal ball knee joint prosthesis, the installation of the universal ball mainly relies on the cooperation between the upper femoral prosthesis and the lower tibial prosthesis, and some reinforcing components are used to fix the universal ball between the upper and lower prostheses to form the final overall structure. In order to prevent the universal ball from falling off and being unstable during use, reinforcing components are used in multiple places to improve the stability of the universal ball. However, this also increases the complexity of disassembly, reduces the disassembly efficiency of the staff, and affects the subsequent normal use of the knee joint prosthesis.

[0004] Therefore, the present application provides a CFR-PEEK material containing universal ball shaft type anti-dislocation tumor knee joint prosthesis to meet the needs. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a CFR-PEEK material containing universal ball shaft type anti-dislocation tumor knee joint prosthesis to solve the problem that in the prior art, when using the universal ball knee joint prosthesis, the installation of the universal ball mainly relies on the cooperation between the upper femoral prosthesis and the lower tibial prosthesis, and some reinforcing components such as shaft pins and locking pins are used to fix the universal ball between the upper and lower prostheses to form the final overall structure. In order to prevent the universal ball from falling off and being unstable during use, reinforcing components are used in multiple places to improve the stability of the universal ball. However, this also increases the complexity of disassembly, reduces the disassembly efficiency of the staff, and affects the subsequent normal use of the knee joint prosthesis.

[0006] To solve the above technical problems, the present application provides the following technical scheme:

[0007] A CFR-PEEK material containing universal ball shaft type anti-dislocation tumor knee joint prosthesis, comprising a prosthesis, a tibial pad is installed in the middle of the prosthesis, a connecting disc is installed at the bottom of the tibial pad, a universal ball shaft is installed at the middle position of the inner wall of the prosthesis, an auxiliary anti-dislocation assembly is connected with the connecting disc, and the auxiliary anti-dislocation assembly limits the universal ball shaft.

[0008] Optionally, the auxiliary anti-off component comprises a clamping buckle fixedly connected to the outer wall of the adapter disc, a pressing plate fixedly connected to the outer wall of the adapter disc, a contact block fixedly connected to the bottom of the outer wall of the pressing plate, and an elastic sheet fixedly connected to the outer wall of the pressing plate.

[0009] Optionally, the outer wall of the contact block is attached to a limiting pad, a clamping groove is formed in the middle of the inner wall of the prosthesis, a limiting plate one is fixedly connected to the inner wall of the clamping groove, and a limiting plate two is fixedly connected to the bottom of the inner wall of the clamping groove.

[0010] Optionally, the bottom of the clamping groove is fixedly connected to a fixing frame, one end of the fixing frame is rotatably connected to a rotating frame, the middle of the rotating frame is fixedly connected to a protective sleeve, and the outer wall of the rotating frame is fixedly connected to a supporting leg.

[0011] Optionally, the outer wall of the bottom of the universal ball shaft is attached to a buffer pad one, the middle of the outer wall of the buffer pad one is fixedly connected to a connecting pad, the outer wall of the connecting pad is attached to an anti-off clasp, the outer wall of the bottom of the universal ball shaft is attached to a buffer pad two, and the inner wall of the buffer pad two is fixedly connected to a friction pad.

[0012] Optionally, the outer wall of the top of the pressing plate is fixedly connected to the outer wall of the adapter disc, the bottom of the pressing plate is in a suspended state, a plurality of slot holes are formed in the middle of the pressing plate, one end of the elastic sheet is fixedly connected to the outer wall of the pressing plate, and the other end of the elastic sheet is fixedly connected to the inner wall of the adapter disc.

[0013] Optionally, the limiting pad is made of elastic material, the size of the clamping groove is consistent with the size of the clamping buckle, the limiting plate one and the limiting plate two are fixedly connected to the inner wall of the clamping groove, and the inner walls are in a hollow shape.

[0014] Optionally, the fixing frame is embedded in the inner wall of the clamping groove, one end of the rotating frame is rotatably connected to the end of the fixing frame, the other end of the rotating frame is provided as a circular ring, the circular ring is rotatably connected to the outer wall of the fixing frame, and the supporting legs are symmetrically and fixedly distributed on the outer wall of the rotating frame with respect to the protective sleeve.

[0015] Optionally, a placing groove is formed in the inner wall of the middle of the prosthesis, the size of the placing groove is consistent with the size of the universal ball shaft, the tibial pad and the adapter disc are in an attached state, and the middle of the adapter disc and the prosthesis are in an attached state.

[0016] Optionally, the size of the buffer pad one is greater than the size of the bottom of the universal ball shaft, the inside of the buffer pad one and the connecting pad is hollow, the outer wall of the buffer pad two is fixedly connected to the inner wall of the prosthesis placing groove, and the buffer groove is arranged on the outer wall of the buffer pad two close to the universal ball shaft.

[0017] Compared with the prior art, the present application has at least the following beneficial effects:

[0018] In the above scheme, by arranging the auxiliary anti-disengagement assembly, some reinforcing parts are not used during the installation of the upper and lower assemblies of the prosthesis, which can reduce the redundant steps during disassembly, improve the flexibility and convenience of disassembly, and also prevent the stability of the prosthesis at the middle position from being reduced due to loosening of the reinforcing parts after a period of use, thereby facilitating the subsequent normal use of the knee prosthesis.

[0019] By arranging the pressing plate, the abutting block and the limiting pad in the auxiliary anti-disengagement assembly, the abutting block drives the pressing plate to automatically pop out of the slot on the side of the adapter disc, and the abutting block abuts against the outer wall of the limiting pad when the abutting block pops out. The outer wall of the limiting pad is provided with a plurality of grooves, and the grooves can increase the friction to prevent the limiting pad from easily shaking and deviating, so that the above series of structures can well guarantee the limiting of the adapter disc after being fixed with the prosthesis, improve the stability of the universal ball shaft during use, and also facilitate the flexibility and convenience during disassembly.

[0020] By arranging the buffer pad one, the connecting pad, the anti-disengagement ring, the buffer pad two and the friction pad, the upper shaft body of the universal ball shaft contacts the outer wall of the buffer pad one, the buffer pad one is deformed and buffered for the second time due to the extrusion of the upper shaft body of the universal ball shaft, and the buffer pad one exerts an action on the connecting pad after being deformed and extruded, so that the connecting pad is better attached to the outer wall of the anti-disengagement ring, the stability between the buffer pad one, the connecting pad and the anti-disengagement ring is improved, the discomfort caused by the excessive speed of the universal ball shaft during overall deflection is reduced, and the comfort and compatibility of the patient during use of the prosthesis are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present application and, together with the description, further serve to explain the principles of the present application and to enable a skilled artisan to make and use the present application.

[0022] Figure 1 A perspective structural schematic view of a universal ball shaft type anti-dislocation tumor knee prosthesis containing CFR-PEEK material;

[0023] Figure 2 A perspective structural schematic view of a universal ball shaft type anti-dislocation tumor knee prosthesis containing CFR-PEEK material;

[0024] Figure 3 Fig. 3 is a perspective view of a cross section of a universal ball shaft type tumor knee joint prosthesis with CFR-PEEK material;

[0025] Figure 4 Fig. 4 is a perspective view of a cross section of a knee joint prosthesis and a universal ball shaft;

[0026] Figure 5 Fig. 5 is a perspective view of a cross section of a connecting disc and a clamping buckle;

[0027] Figure 6 Fig. 6 is a perspective view of a cross section of a connecting disc and a clamping buckle; Figure 5 Fig. 7 is a perspective view of a cross section of a connecting disc and a clamping buckle;

[0028] Figure 7 Fig. 8 is a perspective view of a cross section of a knee joint prosthesis and a limiting pad;

[0029] Figure 8 Fig. 9 is a perspective view of a cross section of a knee joint prosthesis and a limiting pad; Figure 7 Fig. 10 is a perspective view of a cross section of a knee joint prosthesis and a limiting pad;

[0030] Figure 9 Fig. 11 is a perspective view of a cross section of a limiting plate one and a limiting plate two;

[0031] Figure 10 Fig. 12 is a perspective view of a cross section of a fixing frame, a rotating frame and a protective sleeve;

[0032] Figure 11 Fig. 13 is a perspective view of a cross section of a buffer pad one, a clamping ring and a buffer pad two;

[0033] Figure 12 Fig. 14 is a perspective view of a cross section of a universal ball shaft;

[0034] Figure 13 Fig. 15 is a perspective view of a cross section of a clamping ring, a buffer pad two and a friction pad.

[0035] Reference signs:

[0036] 1, prosthesis; 101, placing groove; 2, tibial pad; 3, connecting disc; 301, clamping buckle; 302, pressing plate; 303, abutting block; 304, elastic sheet; 305, limiting pad; 306, clamping groove; 307, limiting plate one; 308, limiting plate two; 309, fixing frame; 310, rotating frame; 311, protective sleeve; 312, supporting frame; 313, notch; 314, circular ring; 4, universal ball shaft; 401, buffer pad one; 402, connecting pad; 403, clamping ring; 404, buffer pad two; 405, friction pad; 406, buffer groove.

[0037] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0038] The following is a detailed description of a universal ball-axis anti-dislocation knee joint prosthesis for tumors containing CFR-PEEK material, provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0039] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0040] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0041] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0042] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0043] like Figures 1 to 13 As shown, an embodiment of the present invention provides a universal ball-axis type anti-dislocation knee joint prosthesis for tumors containing CFR-PEEK material, comprising a prosthesis 1, a tibial pad 2 installed in the middle of the prosthesis 1, a connecting plate 3 installed at the bottom of the tibial pad 2, and a universal ball axis installed in the middle of the inner wall of the prosthesis 1. An auxiliary anti-dislocation component is included, which limits the movement of the universal ball axis 4 and is connected to the connecting plate 3. The prosthesis 1 is divided into upper and lower parts; the upper part is a femoral component, and the lower part is a tibial component, which are existing components and will not be described in detail. The size of the tibial pad 2 is adapted to the movement between the upper and lower components of the prosthesis 1. The side of the connecting plate 3 is provided with a groove 313. The connecting plate 3 is fixed in the middle position of the tibial pad 2 and is located below the tibial pad 2, close to the bottom of the tibial pad 2. The universal ball shaft 4 is divided into an upper part of the shaft and a lower part of the universal ball. The femoral condyle in the femoral component of the conventional prosthesis is made of cobalt-chromium-molybdenum material, which can ensure excellent wear resistance and mechanical strength. However, there are still problems when using it as an implant prosthesis. Now, CFR-PEEK material is used to ensure the mechanical properties of the femoral condyle are adapted, lightweight and translucent. At the same time, the universal ball shaft 4 is designed to be made of CFR-PEEK material, which can reduce the generation of the "stress shielding" effect. CFR-PEEK material can ensure its stability after implantation into the human joint.

[0044] By setting up auxiliary anti-dislodgement components, some reinforcing parts can be eliminated during the installation of the upper and lower components of the prosthesis. On the one hand, this reduces unnecessary steps during disassembly and assembly, improving the flexibility and convenience of disassembly and assembly. On the other hand, after a period of use, the stability of the middle position of the prosthesis will not decrease due to the loosening of the reinforcing parts, which facilitates the normal use of the knee prosthesis in the future.

[0045] like Figures 5 to 10As shown, the auxiliary anti-detachment component includes a snap fastener 301 fixedly connected to the outer wall of the connecting plate 3. A pressing plate 302 is fixedly connected to the outer wall of the connecting plate 3. An abutment block 303 is fixedly connected to the outer wall of the bottom of the pressing plate 302. A spring piece 304 is fixedly connected to the outer wall of the pressing plate 302. A limiting pad 305 is attached to the outer wall of the abutment block 303. A snap groove 306 is provided in the middle of the inner wall of the prosthesis 1. A limiting plate 307 is fixedly connected to the inner wall of the snap groove 306. A limiting plate 308 is fixedly connected to the bottom of the inner wall of the snap groove 306. A fixing frame 309 is fixedly connected to the bottom of the snap groove 306. A rotating frame 310 is rotatably connected to one end of the fixing frame 309. A protective sleeve 311 is fixedly connected to the middle of the rotating frame 310. A support frame 312 is fixedly connected to the outer wall of the rotating frame 310. The outer wall of the top of the pressing plate 302 is fixedly connected to the outer wall of the connecting plate 3. The bottom of the pressing plate 302 is suspended. Several slots are provided in the middle of the pressing plate 302. One end of the spring piece 304 is fixedly connected to the outer wall of the pressing plate 302, and the other end of the spring piece 304 is fixedly connected to the inner wall of the connecting plate 3. The limiting pad 305 is made of elastic material. The size of the snap-fit ​​groove 306 is the same as that of the snap-fit ​​buckle 301. The first limiting plate 307 and the second limiting plate 308 are both fixedly connected to the inner wall of the snap-fit ​​groove 306, and the inner wall is hollow. The fixing frame 309 is embedded in the inner wall of the snap-fit ​​groove 306. One end of the rotating frame 310 is rotatably connected to the end of the fixing frame 309, and the other end of the rotating frame 310 is set as a ring 314, which is rotatably connected to the outer wall of the fixing frame 309. The support brackets 312 are symmetrically fixed to the outer wall of the rotating frame 310 about the protective sleeves 311. The bottom of the snap-fit ​​buckle 301 is made of elastic material, and the rest is made of rigid material. The size of the slot 313 on the side of the connecting plate 3 is the same as the size of the pressing plate 302. There are two spring pieces 304, one fixedly connected to the outer wall of the middle position of the pressing plate 302, and the other fixedly connected to the outer wall of the pressing plate 302 near the contact block 303. Lightweight grooves are provided on both the pressing plate 302 and the contact block 303. The limiting pad 305 is made of elastic material and is fixed in the middle position of the prosthesis 1. The snap-fit ​​groove 306 is not a closed loop structure, but has a notch. The position of the notch is consistent with the position of the limiting pad 305, and there is only one limiting pad 305. Figure 7 The notches of the limiting pad 305 and the snap-fit ​​groove 306 are both located on the left side. The lengths of the first limiting plate 307 and the second limiting plate 308 are the same as the length of the snap-fit ​​buckle 301. The fixing bracket 309 is fixed to the bottom of the inner wall of the snap-fit ​​groove 306, and its side is also fixed to the bottom of the inside of the snap-fit ​​groove 306. The rotating bracket 310 can rotate on the fixing bracket 309.

[0046] With the above structure, before installation, rotate the upper part of the prosthesis 1 180° clockwise or counterclockwise, as long as the upper and lower parts of the prosthesis 1 are not on the same surface. Then, snap the tibial pad 2 onto the top surface of the connecting plate 3 to ensure that the upper part of the prosthesis 1 can work normally. The connecting plate 3 drives the universal ball shaft 4 to move downward and approach the placement groove 101 in the middle of the prosthesis 1. When the bottom of the universal ball shaft 4 contacts the placement groove 101, the snap fastener 301 is exactly in contact with the position of the limiting pad 305. Manually press the pressing plate 302 near the lower half, so that the abutment block 303 and the lower half of the pressing plate 302 move into the groove 313 of the connecting plate 3, so that the abutment block 303 will not obstruct the normal movement of the connecting plate 3 after it is retracted. Figure 7It can be seen that at this time, the abutment block 303 is located on the right side and the latch 301 is located on the left side. Then, it starts to rotate clockwise. During the rotation, the latch 301 rotates from the left to the right and slides on the inner wall of the latch groove 306. At this time, it is no longer necessary to manually press the pressing plate 302. Relying on the squeezing force between the latch groove 306 and the abutment block 303, the pressing plate 302 and the abutment block 303 are automatically squeezed into the slot 313 of the connecting plate 3, and rotate synchronously in opposite directions with the latch 301. When the latch 301 approaches the position of the first limiting plate 307 and the second limiting plate 308, The protective sleeve 311 is initially placed vertically upon initial contact. When the bottom of the latch 301 contacts the protective sleeve 311, the protective sleeve 311 is deflected by the rotational force of the latch 301, causing it to tilt from vertical to the side. During this tilting, the support leg 312 on the stressed side is compressed, deforming as the bottom of the latch 301 slides out of the protective sleeve 311. The support leg 312 then gradually returns to its original vertical position, no longer under compression, as the bottom of the latch 301 slides out of the protective sleeve 311. To ensure the support leg 312 returns to its original position as quickly as possible, the compressed support leg 312 tilts to the other side at the moment of reset, allowing the other support leg 312 to provide support and limit its movement. Furthermore, the material of the protective sleeve 311 is the same as the bottom material of the snap fastener 301. The friction between the elastic materials is greater, which ensures that the bottom of the snap fastener 301 slides better on the protective sleeve 311. At the same time, after the bottom of the snap fastener 301 has completely slid off the protective sleeve 311, the side of the support bracket 312 that is under pressure will spring back to its original position. During the process of springing back to its original position, the other side of the support bracket 312 can promptly provide support when facing the rebound of the protective sleeve 311. To prevent the protective sleeve 311 from deflecting excessively to the other side due to the inertia of its rebound force, and to effectively limit the sliding latch 301, after the latch 301 slides off the protective sleeve 311, it falls on top of the second limiting plate 308. The first limiting plate 307 and the second limiting plate 308 jointly compress the latch 301, further limiting it. Combined with the designed trajectory of the latching groove 306, the position of the latch 301 is restricted under the combined limiting action of these three elements. To improve the comfort of the latch 301 during operation, the interiors of the first limiting plate 307 and the second limiting plate 308 are both hollowed out, allowing the degree of compression to be adjusted according to the force applied, creating a certain buffering effect. At this time, the latch 301 is located... Figure 7 On the right side, the contact block 303 is located Figure 7 On the left side, once the connecting plate 3 is fixed, the position of the tibial pad 2 is also fixed along with the connecting plate 3, at which point the prosthesis 1 can be used normally. It is worth mentioning that, when the contact block 303... Figure 7When the right side of the plate rotates to the left side, there is no corresponding obstruction on the left side. The abutment block 303 will drive the pressing plate 302 to automatically pop out from the slot 313 on the side of the connecting plate 3. When the abutment block 303 pops out, it will abut against the outer wall of the limiting pad 305. The outer wall of the limiting pad 305 is provided with several textures. The textures can increase the friction, so that the limiting pad 305 will not easily shake or shift. Thus, the above series of structures can well ensure the limiting formed by the connecting plate 3 after it is fixed with the prosthesis 1, improve the stability of the universal ball shaft 4 during use, and also facilitate the flexibility and convenience of disassembly and assembly.

[0047] like Figures 11 to 13 As shown, a buffer pad 401 is attached to the outer wall of the bottom of the universal ball shaft 4. A connecting pad 402 is fixedly connected to the middle of the outer wall of the buffer pad 401. An anti-detachment retaining ring 403 is attached to the outer wall of the connecting pad 402. A second buffer pad 404 is attached to the outer wall of the bottom of the universal ball shaft 4. A friction pad 405 is fixedly connected to the inner wall of the second buffer pad 404. The outer wall of the second buffer pad 404 is fixedly connected to the inner wall of the placement groove 101 of the prosthesis 1. A buffer groove 406 is formed on the second buffer pad 404 near the outer wall of the universal ball shaft 4. Both the buffer pad 401 and the connecting pad 402 are hollow inside. The anti-detachment ring 403 and the buffer pad 404 are placed in close contact. The outer wall size of the buffer pad 404 near the universal ball shaft 4 is the same as the size of the universal ball at the bottom of the universal ball shaft 4. The buffer pad 401, the connecting pad 402, the anti-detachment ring 403 and the buffer pad 404 are all made of elastic material.

[0048] With the above structure, while fixing the tibial pad 2 and the connecting plate 3, it is also necessary to fix the universal ball shaft 4. Since the universal ball shaft 4 is located below the connecting plate 3, it needs to be installed first during the installation of the prosthesis 1. In the explanation of the process of fixing and limiting the connecting plate 3, it is clearly stated that when the bottom of the universal ball shaft 4 contacts the placement groove 101, the placement groove 101 in the middle of the prosthesis 1 only has the second buffer pad 404 and the friction pad 405 attached and fixed to the bottom of the second buffer pad 404. After the universal ball at the bottom of the universal ball shaft 4 contacts the top of the second buffer pad 404, it will pass through the second buffer pad 404 and reach the bottom of the second buffer pad 404 under the action of gravity and thrust, and contact and squeeze with the friction pad 405. The diameter of the top of the second buffer pad 404 is smaller than the diameter of the lower universal ball joint of the universal joint shaft 4, so it needs to be pressed down firmly. Then, place the anti-disengagement ring 403 on top of the second buffer pad 404 and press it tightly against the inner wall of the placement groove 101 in the middle of the prosthesis 1. Then, continue to place the first buffer pad 401. When placing the first buffer pad 401, you can choose to slide it tightly against the outer wall of the anti-disengagement ring 403 near the universal joint shaft 4 from top to bottom. The middle position of the outer wall of the anti-disengagement ring 403 has a groove that matches the shape of the protrusion on the outer wall of the first buffer pad 401. When the groove on the anti-disengagement ring 403... Once the connecting pad 402 on the outer wall of the buffer pad 401 is properly engaged, it indicates that the designated position has been reached. At this point, the buffer pad 401 is still some distance from the outer wall of the universal ball shaft 4 and the upper shaft body of the universal ball shaft 4, which is used to buffer the universal ball shaft 4 during slight deflection. After the buffer pad 401, connecting pad 402, and anti-disengagement ring 403 are all in place, the position of the connecting plate 3 is then fixed. Therefore, the steps for fixing the connecting plate 3 mentioned above are after the installation process in this chapter, that is, after the overall structure of the universal ball shaft 4 is installed, the fixing of the connecting plate 3 begins. In this situation, if the lower part of the universal ball joint 4 deflects, the tilted position will cause compression. This compression acts on the outer wall of the second buffer pad 404. The buffer groove 406 on the second buffer pad 404 will first be compressed and deformed, followed by the main body of the second buffer pad 404. This is the first buffer deformation. Afterward, the upper part of the universal ball joint 4 will contact the outer wall of the first buffer pad 401. The first buffer pad 401 will undergo a second deformation and buffering due to the compression of the upper part of the universal ball joint 4. After the first buffer pad 401 deforms and is compressed, it will affect the connecting pad. The function of 402 is that, after the connecting pad 402 is activated, it will fit better against the outer wall of the anti-disengagement ring 403, improving the stability between the buffer pad 401, the connecting pad 402, and the anti-disengagement ring 403. It is worth mentioning that during the deflection of the lower universal ball of the universal ball shaft 4, it will come into contact with the friction pad 405. When several friction pads 405 come into contact with the lower universal ball of the universal ball shaft 4, they will have a certain friction force, reducing the discomfort caused by the excessive speed of the universal ball shaft 4 when it deflects as a whole, and improving the comfort and compatibility of the patient when using the prosthesis 1.

[0049] The working principle of the technical solution provided by this invention is as follows:

[0050] Before installation, rotate the upper part of prosthesis 1 180° clockwise or counterclockwise, ensuring that the upper and lower parts of prosthesis 1 are not on the same surface. Then, snap the tibial liner 2 onto the top surface of the connecting plate 3, ensuring that the upper part of prosthesis 1 can function normally. The connecting plate 3 moves the universal ball shaft 4 downwards and towards the placement groove 101 in the middle of prosthesis 1. When the bottom of the universal ball shaft 4 contacts the placement groove 101, the snap fastener 301 is precisely engaged with the limiting pad 305. Manually press the lower half of the pressing plate 302, causing the contact block 303 and the lower half of the pressing plate 302 to move into the groove 313 of the connecting plate 3. This ensures that the contact block 303 will not obstruct the normal movement of the connecting plate 3 after retraction. Figure 7It can be seen that at this time, the contact block 303 is located on the right side and the latch 301 is located on the left side. Then, it starts to rotate clockwise. During the rotation, the latch 301 rotates from the left to the right and slides on the inner wall of the latch groove 306. The contact block 303 is too small to enter the interior of the latch groove 306, so it is pressed against it. At this time, there is no need to manually press the pressing plate 302. Relying on the pressing force between the latch groove 306 and the contact block 303, the pressing plate 302 and the contact block 303 are automatically pushed into the slot 313 of the connecting plate 3, and rotate synchronously with the latch 301 in opposite directions. When the latch 301 approaches the position of the first limiting plate 307 and the second limiting plate 308, it first contacts the protective sleeve. 311. Initially, the protective sleeve 311 is placed vertically. When the bottom of the latch 301 contacts the protective sleeve 311, the protective sleeve 311 is deflected by the rotational force of the latch 301, causing the protective sleeve 311 to tilt from vertical to the side. During this tilting, the support leg 312 on the stressed side is compressed. During the compression process, the support leg 312 deforms. As the bottom of the latch 301 slides out of the protective sleeve 311, one side of the support leg 312 is no longer compressed, thus gradually returning to its original position and being vertical. In order to ensure the return of the support leg 312 as quickly as possible, the support leg 312 that was compressed on one side will tilt and deflect to the other side at the moment of return. One of the support legs 312 can provide support and limit the movement. The protective sleeve 311 is made of the same material as the bottom of the snap-fit ​​301, resulting in greater friction between the elastic materials. This ensures better sliding of the bottom of the snap-fit ​​301 on the protective sleeve 311. Simultaneously, after the bottom of the snap-fit ​​301 has completely slid off the protective sleeve 311, the support leg 312, no longer under pressure, will spring back to its original position. During this springback process, the other support leg 312 can promptly support the snap-fit ​​311 as it rebounds, preventing the protective sleeve 311 from excessively deflecting to the other side due to the inertia of the rebound force. This is to ensure proper support after the snap-fit ​​has slid. The snap fastener 301 is effectively limited. After the snap fastener 301 slides off the protective sleeve 311, it lands on top of the second limiting plate 308. The combined pressure of the first limiting plate 307 and the second limiting plate 308 further restricts the snap fastener 301. Combined with the designed trajectory of the snap fastener groove 306, the position of the snap fastener 301 is limited by the combined limiting action of these three elements. Furthermore, to improve the comfort of the snap fastener 301 during operation, the interiors of the first limiting plate 307 and the second limiting plate 308 are hollowed out, allowing the degree of compression to be adjusted according to the force applied, thus creating a certain buffering effect. At this time, the snap fastener 301 is located... Figure 7 On the right side, the contact block 303 is located Figure 7 On the left side, once the connecting plate 3 is fixed, the position of the tibial pad 2 is also fixed along with the connecting plate 3. At this point, the prosthesis 1 can be used normally. It is worth mentioning that when the abutment block 303 moves from...Figure 7 When the right side of the plate rotates to the left side, there is no corresponding obstruction on the left side. The abutment block 303 will drive the pressing plate 302 to automatically pop out from the slot 313 on the side of the connecting plate 3. When the abutment block 303 pops out, it will abut against the outer wall of the limiting pad 305. The outer wall of the limiting pad 305 is provided with several textures. The textures can increase the friction, so that the limiting pad 305 will not easily shake or shift. Thus, the above series of structures can well ensure the limiting formed by the connecting plate 3 after it is fixed with the prosthesis 1, improve the stability of the universal ball shaft 4 during use, and also facilitate the flexibility and convenience of disassembly and assembly.

[0051] While fixing the tibial liner 2 and the connecting plate 3, the universal joint 4 also needs to be fixed. Since the universal joint 4 is located below the connecting plate 3, it needs to be installed first during the installation of the prosthesis 1. The explanation of fixing the limiting connecting plate 3 clearly states that when the bottom of the universal joint 4 contacts the placement groove 101, the placement groove 101 in the middle of the prosthesis 1 only contains the second buffer pad 404 and the friction pad 405 attached to the bottom of the second buffer pad 404. After the lower universal joint of the universal joint 4 contacts the top of the second buffer pad 404, under the action of gravity and thrust, it will pass through the second buffer pad 404 and reach the bottom of the second buffer pad 404, contacting and pressing against the friction pad 405. The diameter of the part is smaller than the diameter of the lower universal ball of the universal ball shaft 4, so it needs to be pressed down with force. Then, place the anti-disengagement ring 403 above the second buffer pad 404 and close to the inner wall of the middle placement groove 101 of the prosthesis 1. Then continue to place the first buffer pad 401. When placing the first buffer pad 401, you can choose to slide it from top to bottom close to the outer wall of the anti-disengagement ring 403 near the universal ball shaft 4. The middle position of the outer wall of the anti-disengagement ring 403 has a groove that matches the shape of the protrusion on the outer wall of the first buffer pad 401. When the groove on the anti-disengagement ring 403 and the connecting pad 402 on the outer wall of the first buffer pad 401 are just engaged, it means that the designated position has been reached. At this time, the outer wall of the first buffer pad 401 near the universal ball shaft 4 is still close to the shaft of the upper part of the universal ball shaft 4. A certain distance is provided for buffering the universal ball shaft 4 during slight deflection. After the buffer pad 401, connecting pad 402, and anti-detachment ring 403 are all in place, the connecting plate 3 is then fixed in position. Therefore, the steps for fixing the connecting plate 3 mentioned above are after the installation process in this chapter, that is, after the overall structure of the universal ball shaft 4 is installed, the position of the connecting plate 3 is fixed. At this time, if the universal ball at the bottom of the universal ball shaft 4 deflects, the tilted position will be squeezed. The squeeze acts on the outer wall of the buffer pad 404. The buffer groove 406 on the buffer pad 404 will first be squeezed and deformed, and then the body of the buffer pad 404 will be squeezed and deformed. This is the first buffer deformation. After that, the upper part of the universal ball shaft 4 will contact the buffer pad 401. On the outer wall of 401, the first buffer pad 401 undergoes a second deformation buffer due to the compression of the shaft body on the universal ball shaft 4. After the first buffer pad 401 deforms and is compressed, it will act on the connecting pad 402. After the connecting pad 402 is acted on, it will fit better with the outer wall of the anti-disengagement ring 403, improving the stability between the first buffer pad 401, the connecting pad 402 and the anti-disengagement ring 403. It is worth mentioning that during the deflection of the lower universal ball of the universal ball shaft 4, it will come into contact with the friction pad 405. When several friction pads 405 come into contact with the lower universal ball of the universal ball shaft 4, they will have a certain friction force, reducing the discomfort caused by the excessive speed of the universal ball shaft 4 when it deflects as a whole, and improving the comfort and compatibility of the patient when using the prosthesis 1.

[0052] The disassembly process follows the same principle: first rotate connecting plate 3 counterclockwise, as shown... Figure 7 As shown, the snap fastener 301 will return from the right side to the left side, and the abutment block 303 will return from the left side to the right side. If the abutment block 303 does not automatically rebound during rotation, the pressing plate 302 should be pressed manually. Automatic rebound means that during rotation, the abutment block 303 will press against the limiting pad 305, and the rotational force will cause the abutment block 303 to move towards the slot 313 of the connecting plate 3. Then remove the connecting plate 3. At this time, the connecting plate 3 has been loosened. Then remove the buffer pad 401 and the anti-dislodgement ring 403 from the placement slot 101 in the middle of the prosthesis 1 in sequence. Finally, pull the universal ball shaft 4 out of the placement slot 101 in the middle of the prosthesis 1 with force.

[0053] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A universal ball-axis anti-dislocation knee joint prosthesis containing CFR-PEEK material, comprising a prosthesis, characterized in that, A tibial liner is installed in the middle of the prosthesis, a connecting plate is installed at the bottom of the tibial liner, a universal ball joint is installed in the middle of the inner wall of the prosthesis, an auxiliary anti-dislodgement component is connected to the connecting plate, and the auxiliary anti-dislodgement component limits the universal ball joint. The auxiliary anti-detachment component includes a snap-fit ​​fastener fixedly connected to the outer wall of the connecting plate, a pressing plate fixedly connected to the outer wall of the connecting plate, an abutment block fixedly connected to the outer wall at the bottom of the pressing plate, and a spring piece fixedly connected to the outer wall of the pressing plate. The outer wall of the abutment block is fitted with a limiting pad, and a snap-fit ​​groove is provided in the middle of the inner wall of the prosthesis. A limiting plate one is fixedly connected to the inner wall of the snap-fit ​​groove, and a limiting plate two is fixedly connected to the bottom of the inner wall of the snap-fit ​​groove. A fixed frame is fixedly connected to the bottom of the snap-fit ​​groove, a rotating frame is rotatably connected to one end of the fixed frame, a protective sleeve is fixedly connected to the middle position of the rotating frame, and a support frame is fixedly connected to the outer wall of the rotating frame.

2. The universal ball-axis anti-dislocation type tumor knee joint prosthesis containing CFR-PEEK material according to claim 1, characterized in that, A buffer pad one is attached to the outer wall of the bottom of the universal ball shaft. A connecting pad is fixedly connected to the middle position of the outer wall of the buffer pad one. An anti-detachment retaining ring is attached to the outer wall of the connecting pad. A buffer pad two is attached to the outer wall of the bottom of the universal ball shaft. A friction pad is fixedly connected to the inner wall of the buffer pad two.

3. The universal ball-axis anti-dislocation type tumor knee joint prosthesis containing CFR-PEEK material according to claim 1, characterized in that, The outer wall of the top of the pressing plate is fixedly connected to the outer wall of the connecting plate. The bottom of the pressing plate is suspended. Several slots are opened in the middle of the pressing plate. One end of the spring is fixedly connected to the outer wall of the pressing plate, and the other end of the spring is fixedly connected to the inner wall of the connecting plate.

4. The universal ball-axis anti-dislocation type tumor knee joint prosthesis containing CFR-PEEK material according to claim 1, characterized in that, The limiting pad is made of elastic material, the size of the snap-fit ​​groove is the same as the size of the snap-fit ​​buckle, and both the limiting plate one and the limiting plate two are fixedly connected to the inner wall of the snap-fit ​​groove, and the inner wall is hollow.

5. The universal ball-axis anti-dislocation type tumor knee joint prosthesis containing CFR-PEEK material according to claim 1, characterized in that, The fixed frame is embedded in the inner wall of the snap-fit ​​groove. One end of the rotating frame is rotatably connected to the end of the fixed frame, and the other end of the rotating frame is set as a ring. The ring is rotatably connected to the outer wall of the fixed frame. The support legs are symmetrically fixedly distributed on the outer wall of the rotating frame about the protective sleeve.

6. The universal ball-axis anti-dislocation type tumor knee joint prosthesis containing CFR-PEEK material according to claim 2, characterized in that, The inner wall of the middle part of the prosthesis has a placement groove, the size of which is the same as the size of the universal ball joint. The tibial pad and the connecting plate are in a fitted state, and the connecting plate is in a fitted state with the middle position of the prosthesis.

7. The universal ball-axis anti-dislocation type tumor knee joint prosthesis containing CFR-PEEK material according to claim 6, characterized in that, The size of the first buffer pad is larger than the size of the bottom of the universal ball joint. The interior of the first buffer pad and the connecting pad is hollow. The outer wall of the second buffer pad is fixedly connected to the inner wall of the placement groove of the prosthesis. The second buffer pad has a buffer groove on its outer wall near the universal ball joint.

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