Dismantling device for acetabular cup prosthesis

Abstract

The embodiment of the utility model provides a dismantling device for an acetabular cup prosthesis. The dismantling device comprises a main shaft, a driving piece, a cutting piece, an inclination angle adjusting piece and a main shaft driving handle. The main shaft is provided with a first end and a second end which are oppositely arranged in the axial direction of the main shaft, the driving part is arranged at the first end, and the cutting part is rotatably arranged at the second end; the inclination angle adjusting piece is movably arranged on the main shaft relative to the axial direction of the main shaft, the cutting piece is hinged to the inclination angle adjusting piece, and the main shaft is arranged on the main shaft driving handle in a limited and rotatable penetrating mode. The angle of the cutting piece can be adjusted through the dip angle adjusting piece, and meanwhile the main shaft driving handle can apply acting force towards the first end in the rotating process of the main shaft. Therefore, the dismantling device provided by the embodiment of the utility model has the advantage of improving the surgical operation fineness.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a removal device for an acetabular cup prosthesis. Background Art

[0002] With the continuous growth in the number of total hip arthroplasty (THA) surgeries, many of which require acetabular cup revision surgeries due to problems with the initial replacement components. One of the most challenging steps in revision surgery is removing the old acetabular cup prosthesis. In traditional acetabular cup removal techniques, especially for cemented or strongly fused acetabular cups with bone, there are difficulties in removal. Manually removing a fused acetabular cup requires a high level of technical proficiency and physical strength, which places high demands on the physical strength and skills of the surgeon. Removing a fused acetabular cup may lead to problems such as extended surgery time, increased bone damage, and a longer patient recovery period.

[0003] In related technologies, the acetabular cup removal device includes a main shaft, a power driving member, and a cutting member. The cutting member is closely attached to the inner circumferential surface of the acetabular cup and rotates together with the main shaft to cut the acetabular portion attached to the acetabular cup. The cutting member includes a cutting blade, a mounting seat, and an adjustment portion. The cutting blade is disposed on the mounting seat, and the mounting seat is connected to the main shaft to rotate with the main shaft so that the cutting member cuts the acetabular portion along the shape of the acetabular cup. The adjustment portion can be adjusted by pressing to adjust the inclination angle between the mounting seat and the main shaft and make the cutting member closely attached to the acetabular portion of the acetabular cup. However, during the process of pressing the adjustment portion, the angle of the cutting portion will be changed simultaneously, that is, the pressing force and the inclination angle of the cutting member cannot be adjusted separately, resulting in an increase in surgical bone damage due to operation precision and force output deviation. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems in the related technologies to some extent. For this purpose, an embodiment of the utility model provides a removal device for an acetabular cup prosthesis. The removal device for the acetabular cup prosthesis has the advantage of improving the fineness of surgical operation.

[0005] The removal device for the acetabular cup prosthesis according to the embodiment of the utility model includes a main shaft, a driving member, a cutting member, an inclination angle adjusting member, and a main shaft driving handle.

[0006] The main shaft has a first end and a second end oppositely arranged along the axial direction of the main shaft. The driving member is disposed on the first end, and the cutting member is rotatably disposed on the second end. The inclination angle adjusting member is movably disposed on the main shaft relative to the axial direction of the main shaft, and the cutting member is hinged to the inclination angle adjusting member so as to adjust the inclination angle of the cutting member through the movement of the inclination angle adjusting member. The main shaft is disposed through the main shaft driving handle in a limited and rotatable manner.

[0007] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model can adjust the angle of the cutting member through the provided inclination adjustment member. At the same time, the main shaft driving handle can apply a force towards the first end during the rotation of the main shaft, so that the cutting member can abut against the acetabular cup to provide a support point for the cutting process, thereby realizing the independent control of pressing and angle adjustment. Doctors can adjust the pressing force and the inclination angle of the cutting member according to the actual situation of the operation, which helps to improve the accuracy of cutting member control. Furthermore, it helps to reduce complications, shorten the recovery time, and improve the accuracy and success rate of the operation.

[0008] Therefore, the removal device for the acetabular cup prosthesis according to the embodiment of the present utility model has the advantage of improving the fineness of surgical operation.

[0009] In some embodiments, the main shaft driving handle includes a first sleeve seat, a lever arm and a connecting rod. The main shaft is limited and rotatably arranged on the first sleeve seat. One end of the connecting rod is hinged to the inclination adjustment member, the other end of the connecting rod is hinged to the lever arm, and one end of the lever arm is hinged to the first sleeve seat.

[0010] In some embodiments, the inclination adjustment member includes a sleeve driving handle and a main shaft sleeve. A part of the main shaft sleeve is limited and rotatably arranged on the sleeve driving handle. Both ends of the main shaft extend out of the main shaft sleeve. The main shaft sleeve is axially slidably sleeved on the main shaft relative to the main shaft, and the main shaft sleeve and the main shaft are limited by an anti-rotation member so that the main shaft sleeve rotates with the rotation of the main shaft. The main shaft sleeve is hinged to the cutting member so as to adjust the inclination angle of the cutting member through the movement of the main shaft sleeve. The main shaft is rotatably arranged on the sleeve driving handle.

[0011] In some embodiments, the sleeve driving handle includes a second sleeve seat, a handle part and a bearing. The outer wall surface of the bearing is connected to the second sleeve seat, and the inner wall surface of the bearing is connected to the main shaft.

[0012] In some embodiments, the sleeve driving handle further includes a wear-resistant sleeve, and the wear-resistant sleeve is spaced between the main shaft and the second sleeve seat.

[0013] In some embodiments, the removal device for the acetabular cup prosthesis further includes a plug head, and the plug head plugs at both ends of the second sleeve seat along the axial direction of the main shaft.

[0014] In some embodiments, the main shaft sleeve includes an outer cylinder and an inner cylinder. One end of the inner cylinder is rotatably inserted into the limiting hole of the second sleeve seat, and the other end of the inner cylinder is inserted into the outer cylinder. Moreover, the first end extends out of the outer cylinder and is connected to the cutting member. Both the outer cylinder and the inner cylinder are circumferentially limited to the main shaft by the anti-rotation member so that the main shaft sleeve rotates with the rotation of the main shaft.

[0015] In some embodiments, the main shaft includes a handle connection section, a limiting chute section, and a cutting connection section that are connected in sequence. The free end of the handle connection section is connected to the driving member. The limiting chute section has a limiting chute extending along the axial direction of the main shaft. The anti-rotation member is connected to the outer cylinder and the inner cylinder, and the anti-rotation member is inserted into the limiting chute so as to be slidable when the inner cylinder is subjected to an axial driving force along the main shaft.

[0016] In some embodiments, a limiting ring groove is provided on the handle connection section, and a limiting protrusion is provided on the main shaft driving handle. The limiting protrusion is rotatably inserted into the limiting ring groove relative to the limiting ring groove.

[0017] In some embodiments, the acetabular cup prosthesis removal device further includes a pressure elastic member. A hollow cavity is provided on the cutting connection section. The pressure elastic member is inserted into the hollow cavity, and one end of the pressure elastic member abuts against the end of the limiting chute section. The cutting member is inserted into the hollow cavity of the cutting connection section, and the cutting member abuts against the other end of the pressure elastic member.

[0018] In some embodiments, a limiting portion is provided on the outer wall surface of the cutting member so that when the main shaft sleeve moves relative to the main shaft, the end of the main shaft sleeve abuts against the limiting portion.

[0019] In some embodiments, the cutting member includes a mounting seat, a cutting blade, a connecting rod, and a driving rod. The cutting blade is provided on the mounting seat. One end of the connecting rod is connected to the main shaft, and the other end of the connecting rod is hinged to the mounting seat. One end of the driving rod is hinged to the mounting seat, and the other end of the driving rod is hinged to the inclination adjusting member so that the mounting seat rotates when the inclination adjusting member moves. During the rotation of the main shaft and the inclination of the mounting seat, a cutting trajectory corresponding to the acetabular portion is formed. Description of the Drawings

[0020] Figure 1 is a perspective view of the acetabular cup prosthesis removal device according to an embodiment of the present invention.

[0021] Figure 2 is a cross-sectional view of the acetabular cup prosthesis removal device according to an embodiment of the present invention along the axial direction of the main shaft.

[0022] Figure 3 is Figure 2 A partial view near the first end.

[0023] Figure 4 is Figure 2 A partial view of the middle part.

[0024] Figure 5 is Figure 2 A partial view at the second end.

[0025] Figure 6 is another perspective view of the removal device for the acetabular cup prosthesis according to an embodiment of the present utility model.

[0026] Figure 7 is another perspective view of the removal device for the acetabular cup prosthesis according to an embodiment of the present utility model, pressing the main shaft drive handle.

[0027] Figure 8 is a partial exploded view of the removal device for the acetabular cup prosthesis according to an embodiment of the present utility model near the first end.

[0028] Figure 9 is another partial exploded view of the removal device for the acetabular cup prosthesis according to an embodiment of the present utility model near the first end.

[0029] Figure 10 is the front view of the main shaft in an embodiment of the present utility model.

[0030] Figure 11 is the sectional view of the main shaft in an embodiment of the present utility model.

[0031] Reference numerals:

[0032] Main shaft 1; handle connection section 11; limit ring groove 111;

[0033] Limit chute section 12; limit chute 121;

[0034] Cutting connection section 13; hollow cavity 131;

[0035] Driver 2;

[0036] Cutting member 3; mounting seat 31; cutting blade 32; connecting rod 33; limiting portion 331; driving rod 34;

[0037] Inclination adjustment member 4; sleeve drive handle 41; second sleeve body seat 411; handle portion 412; bearing 413;

[0038] Wear-resistant sleeve 414; limit block 4141; wear-resistant cylinder 4142;

[0039] Sealing head 415;

[0040] Spindle sleeve 42; outer cylinder 421; inner cylinder 422; anti-rotation member 423;

[0041] Spindle drive handle 5; first body seat 51; lever arm 52; connecting rod 53; limit projection 54;

[0042] Pressure elastic member 6;

[0043] Limit pin shaft 7. Specific implementation manner

[0044] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0045] Below with reference to Figures 1 - 11 Describe the acetabular cup prosthesis removal device according to the embodiments of the present utility model.

[0046] The acetabular cup prosthesis removal device according to the embodiments of the present utility model includes a main shaft 1, a driving member 2, a cutting member 3, an inclination adjustment member 4, and a main shaft drive handle 5.

[0047] The main shaft 1 has a first end and a second end disposed opposite to each other along the axial direction of the main shaft 1. The driving member 2 is disposed on the first end, and the cutting member 3 is rotatably disposed on the second end. The inclination adjustment member 4 is movably disposed on the main shaft 1 relative to the axial direction of the main shaft 1, and the cutting member 3 is hinged to the inclination adjustment member 4 so as to adjust the inclination angle of the cutting member 3 by the movement of the inclination adjustment member 4. The main shaft 1 is disposed through the main shaft drive handle 5 in a limited and rotatable manner.

[0048] For the acetabular cup prosthesis removal device according to the embodiments of the present utility model, the angle of the cutting member 3 can be adjusted by the provided inclination adjustment member 4. At the same time, the provided main shaft drive handle 5 can apply an axial acting force during the rotation of the main shaft 1, so that the cutting member 3 can abut against the acetabular cup to provide a support site for the cutting process, thereby realizing the separate control of the pressing force and the angle adjustment. The doctor can adjust the pressing force and the inclination of the cutting member 3 according to the actual situation of the operation, which helps to improve the accuracy of the control of the cutting member 3. Furthermore, it helps to reduce complications, shorten the recovery time, and improve the accuracy and success rate of the operation.

[0049] Therefore, the acetabular cup prosthesis removal device according to the embodiments of the present utility model has the advantage of improving the fineness of surgical operation.

[0050] Such as Figure 1 、 Figure 2 、 Figure 6 And Figure 7As shown in the figure, the main shaft driving handle 5 includes a first sleeve seat 51, a lever arm 52, and a connecting rod 53. The main shaft 1 is disposed through the first sleeve seat 51 in a limited and rotatable manner. One end of the connecting rod 53 is hinged to the inclination adjusting member 4, the other end of the connecting rod 53 is hinged to the lever arm 52, and one end of the lever arm 52 is hinged to the first sleeve seat 51. It can be understood that the first sleeve seat 51 does not rotate with the rotation of the main shaft 1, and the movement of the first sleeve seat 51 will drive the main shaft 1 to move.

[0051] In the acetabular cup prosthesis removal device according to the embodiment of the present invention, by dividing the main shaft driving handle 5 into a first sleeve seat 51, a lever arm 52, and a connecting rod 53, and through the cooperation of the lever arm 52 and the connecting rod 53, a lever structure is formed, thereby reducing the pressing force during the doctor's pressing process, making it easier for the doctor to apply a downward pressure, and reducing the physical consumption of the doctor during operation. Thus, the removal device has the advantage of being labor-saving.

[0052] As Figures 2 to 5 shown in the figure, the inclination adjusting member 4 includes a sleeve driving handle 41 and a main shaft sleeve 42. A part of the main shaft sleeve 42 is disposed through the sleeve driving handle 41 in a limited and rotatable manner. Both ends of the main shaft 1 extend out of the main shaft sleeve 42. The main shaft sleeve 42 is sleeved on the main shaft 1 in an axially slidable manner relative to the main shaft 1, and the main shaft sleeve 42 and the main shaft 1 are limited by an anti-rotation member 423 so that the main shaft sleeve 42 rotates with the rotation of the main shaft 1, and the main shaft sleeve 42 is hinged to the cutting member 3 so as to adjust the inclination angle of the cutting member 3 through the movement of the main shaft sleeve 42. The main shaft 1 is rotatably disposed through the sleeve driving handle 41. It can be understood that both the sleeve driving handle 41 and the main shaft sleeve 42 can slide relative to the main shaft 1.

[0053] In the acetabular cup prosthesis removal device according to the embodiment of the present invention, by dividing the inclination adjusting member 4 into a sleeve driving handle 41 and a main shaft sleeve 42, the main shaft sleeve 42 is sleeved on the main shaft 1 in an axially movable manner relative to the main shaft 1 so that the main shaft sleeve 42 rotates with the rotation of the main shaft 1, and the main shaft sleeve 42 is hinged to the cutting member 3, and the inclination angle of the cutting member 3 is adjusted through the movement of the main shaft sleeve 42, which has the advantages of simple structure and good structural integrity. In addition, the provided sleeve driving handle 41 facilitates the driving of the main shaft sleeve 42, making it easier for the doctor to apply a downward pressure. Thus, the removal device has the advantage of high operation convenience, thereby improving the accuracy and efficiency of the operation.

[0054] As Figures 2 to 5 shown in the figure, the sleeve driving handle 41 includes a second sleeve seat 411, a handle portion 412, and a bearing 413. The outer wall surface of the bearing 413 is connected to the second sleeve seat 411, and the inner wall surface of the bearing 413 is connected to the main shaft 1.

[0055] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model divides the sleeve driving handle 41 into a second sleeve seat 411, a handle part 412, and a bearing 413. Taking the bearing 413 as the interval between the second sleeve seat 411 and the main shaft 1, when ensuring that the second sleeve seat 411 exerts a thrust to push the main shaft sleeve 42 to slide, it will not rotate due to the rotation of the main shaft 1, and the main shaft 1 and the main shaft sleeve 42 can rotate smoothly relative to the second sleeve seat 411. Thus, the friction during the rotation of the main shaft 1 is reduced.

[0056] Specifically, one end of the connecting rod 53 is connected to the second sleeve seat 411, and the other end of one end of the connecting rod 53 is arranged in the area approximately in the middle of the lever arm 52. Further, the connecting rod 53 is arranged opposite to the handle part 412 along the radial direction of the main shaft sleeve 42.

[0057] Further, the second sleeve seat 411 and the handle part 412 can be integrally arranged. Thus, the removal device has the advantage of good structural integrity.

[0058] Optionally, the bearing 413 can be a thrust bearing 413.

[0059] As Figures 2 to 5 shown, the sleeve driving handle 41 further includes an anti-wear sleeve 414, and the anti-wear sleeve 414 is spaced between the main shaft 1 and the second sleeve seat 411.

[0060] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model can further improve the stability of the system and reduce the friction when the main shaft 1 rotates by arranging the interval between the main shaft 1 and the second sleeve seat 411.

[0061] Optionally, the anti-wear sleeve 414 can include a limit block 4141 and an anti-wear cylinder 4142. The second sleeve seat 411 has a sleeve cylinder, and the sleeve cylinder has a first limit groove and a second limit groove arranged at intervals. The limit block 4141 is embedded in the first limit groove and the second limit groove, and the anti-wear cylinder 4142 is sleeved on the main shaft 1, and both ends of the anti-wear cylinder 4142 are respectively abutted against the limit block 4141. Thus, the removal device has the advantage of convenient disassembly.

[0062] For example, the limit block 4141 can be a polyethylene cushion block. Thus, setting the limit block 4141 as a polyethylene cushion block has the advantages of good wear resistance and low cost.

[0063] As Figures 2 to 5 shown, the removal device for the acetabular cup prosthesis according to the embodiment of the present utility model further includes a plugging head 415, and the plugging head 415 plugs the two ends of the second sleeve seat 411 along the axial direction of the main shaft 1.

[0064] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model can prevent pollutants from entering the second sleeve seat 411 and the bearing 413 by means of the provided plugging head 415. Thus, the removal device helps to improve the cleanliness inside the instrument.

[0065] Optionally, the plugging head 415 can be a sealing gasket, and the sealing gasket can be fixed to both ends of the second sleeve seat 411 by screws.

[0066] As Figures 2 to 5 shown, the main shaft sleeve 42 includes an outer cylinder 421 and an inner cylinder 422. One end of the inner cylinder 422 is rotatably inserted into the limiting hole of the second sleeve seat 411, the other end of the inner cylinder 422 is inserted into the outer cylinder 421, and the first end extends out of the outer cylinder 421 and is connected to the cutting member 3. Both the outer cylinder 421 and the inner cylinder 422 are circumferentially limited to the main shaft 1 by the anti-rotation member 423 so that the main shaft sleeve 42 rotates with the rotation of the main shaft 1.

[0067] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model has the main shaft sleeve 42 divided into an outer cylinder 421 and an inner cylinder 422. One end of the inner cylinder 422 is rotatably inserted into the limiting hole of the second sleeve seat 411, the other end of the inner cylinder 422 is inserted into the outer cylinder 421, and the first end extends out of the outer cylinder 421 and is connected to the cutting member 3. Thus, the removal device has the advantage of simple structure.

[0068] As Figure 10 and Figure 11 shown, the main shaft 1 includes a handle connection section 11, a limiting chute section 12, and a cutting connection section 13 connected in sequence. The free end of the handle connection section 11 is connected to the driving member 2. The limiting chute section 12 has a limiting chute 121 extending along the axial direction of the main shaft 1. The anti-rotation member 423 is connected to the outer cylinder 421 and the inner cylinder 422, and the anti-rotation member 423 is inserted into the limiting chute 121 so as to be slidable when the inner cylinder 422 is subjected to an axial driving force along the main shaft 1.

[0069] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model divides the main shaft 1 into a handle connection section 11, a limiting chute section 12, and a cutting connection section 13 connected in sequence. The limiting chute section 12 has a limiting chute 121 extending along the axial direction of the main shaft 1, and the relative sliding between the main shaft 1 and the inclination adjustment member 4 is realized by setting the structure of the key groove. Thus, the removal device has the advantages of simple structure and high processing convenience.

[0070] As Figure 10 and Figure 11 shown, the handle connection section 11 has a limiting ring groove 111, and a limiting projection 54 is inserted through the main shaft driving handle 5. The limiting projection 54 is arranged in the limiting ring groove 111. It can be understood that the limiting projection 54 can rotate relative to the limiting ring groove 111.

[0071] The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model is provided with a limit ring groove 111 on the handle connection section 11. A limit projection 54 is disposed through the spindle drive handle 5. The limit projection 54 is rotatably disposed within the limit ring groove 111. Thus, while ensuring that the spindle drive handle 5 does not rotate with the spindle 1, an axial force can be applied to the spindle 1 by pressing the spindle drive handle 5. That is, the rotation of the spindle 1 will not be interfered during the application of the pressing force. This removal device has the advantages of high safety and simple structure.

[0072] Optionally, the first sleeve seat 51 is provided with a positioning hole and a first sleeve hole. The positioning pin is disposed through the positioning hole and protrudes from the inner wall surface of the first sleeve hole. The positioning pin forms the limit projection 54. During disassembly, the positioning pin can be pulled out first and then the first sleeve seat 51 can be removed.

[0073] As Figures 2 to 5 As shown, the removal device for the acetabular cup prosthesis according to the embodiment of the present utility model further includes a pressure elastic member 6. A hollow cavity 131 is formed on the cutting connection section 13. The pressure elastic member 6 is inserted into the hollow cavity 131 and one end of the pressure elastic member 6 abuts against the end of the limit chute section 12. The cutting member 3 is disposed through the hollow cavity 131 of the cutting connection section 13, and the cutting member 3 abuts against the other end of the pressure elastic member 6.

[0074] For the removal device for the acetabular cup prosthesis according to the embodiment of the present utility model, by providing the elastic member, when it is necessary to disassemble the cutting member 3, the cutting member 3 can be directly abutted out by the pressure elastic member 6. Thus, the convenience of disassembling the cutting member 3 is improved for this removal device.

[0075] Specifically, one end of the hollow cavity 131 is in a closed state. One end of the pressure elastic member 6 is supported at one end of the hollow portion, and the connecting member supports the other end of the pressure elastic member 6.

[0076] As Figures 2 to 5 As shown, a limit portion 331 is provided on the outer wall surface of the cutting member 3, so that when the spindle sleeve 42 moves relative to the spindle 1, the end of the spindle sleeve 42 abuts against the limit portion 331.

[0077] For the removal device for the acetabular cup prosthesis according to the embodiment of the present utility model, by providing the limit portion 331 on the outer wall surface of the cutting member 3, so that when the spindle sleeve 42 moves relative to the spindle 1, the end of the spindle sleeve 42 abuts against the limit portion 331, so that when the handle portion 412 is continuously pressed, it can act on the cutting member 3.

[0078] That is to say, the doctor can control the spindle 1 by holding the inclination adjustment member 4 with one hand and holding the spindle drive handle 5 with the other hand. The removal device for the acetabular cup prosthesis according to the embodiment of the present utility model helps to improve the stability of the force on the spindle 1.

[0079] As Figure 8 and Figure 9 shown, the cutting member 3 includes a mounting seat 31, a cutting blade 32, a connecting rod 33, and a driving rod 34. The cutting blade 32 is disposed on the mounting seat 31. One end of the connecting rod 33 is connected to the main shaft 1, and the other end of the connecting rod 33 is hinged to the mounting seat 31. The mounting seat 31 is connected to the main shaft 1 through the connecting rod 33. One end of the driving rod 34 is hinged to the mounting seat 31, and the other end of the driving rod 34 is hinged to the main shaft sleeve 42 so that the mounting seat 31 rotates when the main shaft sleeve 42 moves axially along the main shaft 1.

[0080] In the removal device of the acetabular cup prosthesis according to the embodiment of the present invention, by dividing the cutting member 3 into a mounting seat 31, a cutting blade 32, a connecting rod 33, and a driving rod 34, therefore, the surface of the acetabular part can be evenly cut. By moving in the front-back direction, the cutting member 3 can be directly located at the position where more cutting is required in the acetabular cup part, and the inclination angle of the cutting member 3 can be directly adjusted to the previous angle. Therefore, it is convenient to use and reduces the operation time.

[0081] Specifically, the limiting portion 331 is disposed on the outer wall surface of the connecting rod 33. One end of the connecting rod 33 passes through the hollow cavity 131 of the cutting connection section 13. One end of the connecting rod 33 abuts against the pressure elastic member 6, and the connecting rod 33 and the main shaft 1 are limited by a limiting pin shaft 7. During disassembly, the limiting pin shaft 7 can be removed first, and the pressure elastic member 6 can directly push the connecting rod 33 out of the hollow cavity 131. Thus, the convenience of removing the cutting member 3 of this removal device is improved.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0083] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0084] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0085] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0086] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0087] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A removal device for an acetabular cup prosthesis, characterized in that Comprising: A main shaft, a driving member, and a cutting member. The main shaft has a first end and a second end oppositely arranged along the axial direction of the main shaft. The driving member is arranged on the first end, and the cutting member is rotatably arranged on the second end; An inclination adjusting member, which is movably arranged on the main shaft relative to the axial direction of the main shaft, and the cutting member is hinged to the inclination adjusting member so as to adjust the inclination angle of the cutting member by the movement of the inclination adjusting member; A main shaft driving handle, and the main shaft is arranged through the main shaft driving handle in a limited and rotatable manner.

2. The acetabular cup prosthesis removal device according to claim 1, wherein The main shaft driving handle includes a first sleeve seat, a lever arm, and a connecting rod. The main shaft is arranged through the first sleeve seat in a limited and rotatable manner. One end of the connecting rod is hinged to the inclination adjusting member, the other end of the connecting rod is hinged to the lever arm, and one end of the lever arm is hinged to the first sleeve seat.

3. The removal device for the acetabular cup prosthesis according to claim 1, wherein, The inclination adjusting member includes a sleeve driving handle and a main shaft sleeve. A part of the main shaft sleeve is arranged through the sleeve driving handle in a limited and rotatable manner. Both ends of the main shaft extend out of the main shaft sleeve. The main shaft sleeve is slidably sleeved on the main shaft relative to the axial direction of the main shaft, and the main shaft sleeve and the main shaft are limited by an anti-rotation member so that the main shaft sleeve rotates with the rotation of the main shaft. The main shaft sleeve is hinged to the cutting member so as to adjust the inclination angle of the cutting member by the movement of the main shaft sleeve. The main shaft is rotatably arranged through the sleeve driving handle.

4. The removal device for the acetabular cup prosthesis according to claim 3, wherein, The sleeve driving handle includes a second sleeve seat, a handle part, and a bearing. The outer wall surface of the bearing is connected to the second sleeve seat, and the inner wall surface of the bearing is connected to the main shaft.

5. The removal device for the acetabular cup prosthesis according to claim 4, characterized in that, The sleeve driving handle further includes a wear-resistant sleeve, and the wear-resistant sleeve is spaced between the main shaft and the second sleeve seat; And / or, the sleeve driving handle further includes a plug head, and the plug head plugs at both ends of the second sleeve seat along the axial direction of the main shaft.

6. The device for removing the acetabular cup prosthesis according to claim 5, characterized in that, The main shaft sleeve includes an outer cylinder and an inner cylinder. One end of the inner cylinder is rotatably arranged in the limit hole of the second sleeve seat, the other end of the inner cylinder is arranged in the outer cylinder, and the first end extends out of the outer cylinder and is connected to the cutting member. Both the outer cylinder and the inner cylinder are circumferentially limited to the main shaft by the anti-rotation member so that the main shaft sleeve rotates with the rotation of the main shaft.

7. The removal device for the acetabular cup prosthesis according to claim 6, characterized in that, The main shaft includes a handle connection section, a limit chute section, and a cutting connection section connected in sequence. The free end of the handle connection section is connected to the driving member. The limit chute section has a limit chute extending along the axial direction of the main shaft. The anti-rotation member is connected to the outer cylinder and the inner cylinder, and the anti-rotation member passes through the limit chute so as to be slidable when the inner cylinder is subjected to an axial driving force along the main shaft.

8. The removal device for the acetabular cup prosthesis according to claim 7, characterized in that, The handle connection section has a limit ring groove, and a limit protrusion is arranged through the main shaft driving handle. The limit protrusion is rotatably arranged in the limit ring groove relative to the limit ring groove; And / or, it further includes a pressure elastic member. A hollow cavity is formed in the cutting connection section. The pressure elastic member is inserted into the hollow cavity, and one end of the pressure elastic member abuts against the end of the limit chute section. The cutting member passes through the hollow cavity of the cutting connection section, and the cutting member abuts against the other end of the pressure elastic member.

9. The removing device for the acetabular cup prosthesis according to claim 8, wherein, A limiting portion is provided on the outer wall surface of the cutting member so that when the spindle sleeve moves relative to the spindle, the end of the spindle sleeve abuts against the limiting portion.

10. The removal device for the acetabular cup prosthesis according to any one of claims 1-9, characterized in that The cutting member includes a mounting seat, a cutting blade, a connecting rod, and a driving rod. The cutting blade is arranged on the mounting seat. One end of the connecting rod is connected to the spindle, and the other end of the connecting rod is hinged to the mounting seat. One end of the driving rod is hinged to the mounting seat, and the other end of the driving rod is hinged to the inclination adjustment member so that the mounting seat rotates when the inclination adjustment member moves. During the rotation of the spindle and the inclination of the mounting seat, a cutting trajectory corresponding to the acetabular part is formed.

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