implant

Abstract

The present disclosure relates to the technical field of medical devices, and proposes an implanter. The implanter includes a main body, an inner core rod, and an elastic member. The main body has a receiving cavity; the inner core rod is arranged in the receiving cavity, and the inner core rod is used to connect with the acetabular cup; the elastic member is arranged in the receiving cavity, one end of the elastic member abuts against the inner core rod, and the other end of the elastic member abuts against the main body, so as to provide a pre-tightening force toward the acetabular cup to the inner core rod. The implanter disclosed in the present disclosure has an elastic member arranged between the main body and the inner core rod. When the acetabular cup is implanted using the implanter, the inner core rod is connected to the acetabular cup. The recoil force received by the inner core rod during the knocking of the implanter will be offset by the pre-tightening force provided to the inner core rod by the elastic member, thereby avoiding the problem of loose implantation caused by the recoil force.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to an implanter. Background Art

[0002] After the acetabular cup implanter is connected to the acetabular cup, the implantation of the acetabular cup is completed by knocking the tail cap of the instrument. During the knocking process, the cup implanter will be subjected to a recoil force, which is a force that drives the implanter out of the acetabular cup. This will cause the acetabular cup to be implanted in an inaccurate position and a loose implantation, and may also damage the implanter. Summary of the Invention

[0003] A main purpose of the present disclosure is to overcome at least one of the above-mentioned defects of the prior art and provide an implanter.

[0004] The present invention provides an implanter, comprising:

[0005] A main body having a receiving cavity;

[0006] An inner core rod is disposed in the accommodating cavity and is used to connect with the acetabulum cup;

[0007] The elastic member is arranged in the accommodating cavity, one end of the elastic member abuts against the inner core rod, and the other end of the elastic member abuts against the main body to provide a pre-tightening force to the inner core rod toward the acetabular cup.

[0008] In one embodiment of the present invention, the inner core rod is movably arranged relative to the axial direction of the main body.

[0009] In one embodiment of the present invention, a protrusion is provided on the inner core rod, one end of the protrusion facing the acetabular cup abuts against the main body, and the other end of the protrusion abuts against the elastic member.

[0010] In one embodiment of the present invention, the inner core rod and the protrusion are integrally formed.

[0011] In one embodiment of the present invention, the inner core rod and the protrusion are combined into an integral structure by two independent components.

[0012] In one embodiment of the present invention, the accommodating cavity comprises:

[0013] A first cavity segment, the first cavity segment being arranged on a side of the main body close to the acetabular cup;

[0014] a second cavity segment, the second cavity segment being arranged on a side of the main body away from the acetabular cup, the first cavity segment being communicated with the second cavity segment, and the diameter of the first cavity segment being smaller than the diameter of the second cavity segment;

[0015] The elastic member and the protrusion are both located in the second cavity segment, and the protrusion is stopped on the cavity opening of the first cavity segment.

[0016] In one embodiment of the present invention, the protrusion is provided in the middle portion of the inner core rod, and the inner core rod comprises a first rod segment and a second rod segment connected to each other, the first rod segment being located in the first cavity segment and being used to connect with the acetabular cup, the second rod segment being located in the second cavity segment, and the elastic member being sleeved on the second rod segment;

[0017] The diameter of the first rod segment is greater than the diameter of the second rod segment.

[0018] In one embodiment of the present invention, the inner core rod is provided with threads for threaded connection with the acetabular cup.

[0019] In one embodiment of the present invention, the elastic member is a spring.

[0020] In one embodiment of the present invention, the subject comprises:

[0021] a main body portion, the main body portion having at least a portion of the accommodating cavity;

[0022] An adapting portion, which is arranged at one end of the main body and is used to adapt to the acetabular cup;

[0023] An end cap portion is provided at the other end of the main body portion, and an elastic member is sandwiched between the inner core rod and the end cap portion;

[0024] An unlocking wrench connected to a side of the inner core rod away from the adapter portion;

[0025] The inner core rod is rotatably arranged relative to the adapter portion, so that after the acetabular cup is installed in place, the unlocking wrench drives the inner core rod to rotate relative to the adapter portion to separate from the acetabular cup.

[0026] The implanter of the present invention is provided with an elastic member between the main body and the inner core rod. When the acetabular cup is implanted using the implanter, the inner core rod is connected to the acetabular cup. During the process of striking the implanter, the recoil force exerted on the inner core rod is offset by the pre-tightening force provided to the inner core rod by the elastic member, thereby avoiding the problem of loose implantation caused by the recoil force. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The various objects, features, and advantages of the present disclosure will become more apparent upon consideration of the following detailed description of preferred embodiments of the present disclosure in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present disclosure and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout.

[0028] Figure 1 is a schematic structural diagram of an implanter according to an exemplary embodiment;

[0029] Figure 2is a schematic structural diagram of a main body of an implanter according to an exemplary embodiment;

[0030] Figure 3 is a schematic structural diagram of an implanter according to another exemplary embodiment;

[0031] Figure 4 is a schematic diagram of an exploded structure of an implanter according to another exemplary embodiment;

[0032] Figure 5 is a schematic structural diagram of a main body of an implanter according to an exemplary embodiment;

[0033] Figure 6 is a schematic structural diagram of a pressure cap of an implanter from a first perspective according to an exemplary embodiment;

[0034] Figure 7 is a schematic structural diagram of a pressure cap of an implanter from a second perspective according to an exemplary embodiment;

[0035] Figure 8 is a schematic structural diagram of a pressure cap of an implanter from a third perspective according to an exemplary embodiment;

[0036] Figure 9 is a schematic structural diagram of a percussion cap of an implanter according to an exemplary embodiment;

[0037] Figure 10 is a schematic structural diagram of an unlocking wrench of an implanter from a first perspective according to an exemplary embodiment;

[0038] Figure 11 is a schematic structural diagram of an unlocking wrench of an implanter from a second perspective according to an exemplary embodiment;

[0039] Figure 12 is a schematic cross-sectional view of an inner core rod of an implanter according to an exemplary embodiment;

[0040] Figure 13 is a schematic structural diagram showing an inner core rod of an implanter from a first perspective according to an exemplary embodiment;

[0041] Figure 14 is a schematic structural diagram showing an inner core rod of an implanter from a second perspective according to an exemplary embodiment;

[0042] Figure 15 is a schematic structural diagram of an elastic member of an implanter according to an exemplary embodiment;

[0043] Figure 16 It is a schematic diagram of a partial structure of an implanter according to an exemplary embodiment.

[0044] The following are the descriptions of the reference numerals:

[0045] 10. Main body; 11. Accommodating cavity; 111. First cavity segment; 112. Second cavity segment; 12. Main body; 13. Adapter; 14. End cap; 141. Pressing cap; 142. Knocking cap; 15. Unlocking wrench; 151. First connecting part; 20. Inner core rod; 21. First rod segment; 22. Second rod segment; 23. Second connecting part; 30. Elastic member; 40. Protrusion. DETAILED DESCRIPTION

[0046] Typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various variations in different embodiments without departing from the scope of the present disclosure, and the description and drawings therein are essentially for illustrative purposes rather than for limiting the present disclosure.

[0047] In the following description of different exemplary embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part of this disclosure and in which are shown by way of example different exemplary structures, systems and steps that may implement aspects of the present disclosure. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps may be used, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein for convenience only, such as according to the orientation of the examples in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present disclosure.

[0048] One embodiment of the present invention provides an implanter, please refer to Figures 1 to 15 The implanter includes: a main body 10, which has a receiving cavity 11; an inner core rod 20, which is arranged in the receiving cavity 11 and is used to connect with the acetabular cup; an elastic member 30, which is arranged in the receiving cavity 11, one end of the elastic member 30 abuts against the inner core rod 20, and the other end of the elastic member 30 abuts against the main body 10 to provide a pre-tightening force to the inner core rod 20 toward the acetabular cup.

[0049] The implanter of one embodiment of the present invention is provided with an elastic member 30 between the main body 10 and the inner core rod 20. When the acetabular cup is implanted using the implanter, the inner core rod 20 is connected to the acetabular cup. During the process of striking the implanter, the recoil force exerted on the inner core rod 20 is offset by the pre-tightening force provided to the inner core rod 20 by the elastic member 30, thereby avoiding the problem of loose implantation caused by the recoil force.

[0050] In one embodiment, when the acetabular cup is implanted, the inner core rod 20 is connected to the acetabular cup, and after the acetabular cup is placed in place, the main body 10 is tapped to achieve the implantation of the acetabular cup. Figure 16 As shown, the outside will provide an external force to the implanter in a direction as shown by ①, and the direction of the recoil force on the inner core rod 20 is shown by ②. Since the direction of the preload force generated by the elastic member 30 is shown by ③, the recoil force and the preload force will be offset, thereby avoiding the influence of the recoil force on the inner core rod 20.

[0051] In one embodiment, the inner core rod 20 is movably disposed relative to the main body 10. During the specific implantation process, the main purpose of the elastic member 30 is to prevent the inner core rod 20 from moving relative to the main body 10, that is, to offset the recoil force by providing a pre-tightening force to the inner core rod 20 through the elastic member 30.

[0052] In one embodiment, the inner core rod 20 is movably arranged relative to the main body 10, that is, the inner core rod 20 and the main body 10 are separate components, but under the action of the elastic member 30, the inner core rod 20 and the main body 10 are relatively fixed, and during the implantation process, even if it is subjected to a recoil force, the pre-tightening force provided by the elastic member 30 can prevent the inner core rod 20 from moving relative to the main body 10.

[0053] In one embodiment, the inner core rod 20 is movably disposed relative to the axial direction of the main body 10 so that the inner core rod 20 can be removed from the main body 10 .

[0054] In one embodiment, a protrusion 40 is provided on the inner core rod 20. One end of the protrusion 40 facing the acetabular cup abuts against the main body 10, and the other end of the protrusion 40 abuts against the elastic member 30. The protrusion 40 is provided primarily to retain the inner core rod 20 within the accommodating cavity 11 of the main body 10 via the elastic member 30. That is, under the action of the elastic member 30, the protrusion 40 abuts against the main body 10.

[0055] In one embodiment, Figure 1 and Figure 3 As shown, part of the inner core rod 20, the protrusion 40 and the elastic member 30 are all located in the accommodating cavity 11. The protrusion 40 is stopped on the main body 10 under the action of the elastic member 30, that is, the length of the part of the inner core rod 20 located outside the accommodating cavity 11 is guaranteed to be determined. The part of the inner core rod 20 located outside the accommodating cavity 11 is used to connect with the acetabulum cup.

[0056] In one embodiment, the protrusion 40 is an annular protrusion arranged around the inner core rod 20, or it can be a small protrusion located on the outside of the inner core rod 20. That is, as long as it can ensure the stopping elastic member 30, its specific structure is not limited.

[0057] In one embodiment, the inner core rod 20 and the protrusion 40 are integrally formed. Integrating the inner core rod 20 and the protrusion 40 can improve manufacturing efficiency and increase structural stability.

[0058] In one embodiment, the inner core rod 20 and the protrusion 40 are combined into an integral structure from two separate components. The inner core rod 20 and the protrusion 40 can be manufactured as two separate structures and then connected during use to form a single integral structure. The inner core rod 20 and the protrusion 40 can be connected using various connection methods, such as threaded connection or welding, as long as they are securely connected. Using the inner core rod 20 and the protrusion 40 as separate structures facilitates the preparation of different configurations and makes assembly more convenient.

[0059] In one embodiment, the accommodating cavity 11 includes: a first cavity segment 111, which is disposed on a side of the main body 10 close to the acetabular cup; and a second cavity segment 112, which is disposed on a side of the main body 10 away from the acetabular cup. The first cavity segment 111 is connected to the second cavity segment 112, and the diameter of the first cavity segment 111 is smaller than the diameter of the second cavity segment 112. The elastic member 30 and the protrusion 40 are both located in the second cavity segment 112, and the protrusion 40 stops at the cavity opening of the first cavity segment 111. Designing the accommodating cavity 11 into cavities of different sizes can better accommodate the installation of the inner core rod 20, the elastic member 30, and the protrusion 40.

[0060] In one embodiment, Figure 2 and Figure 5 As shown, the accommodating cavity 11 is composed of a first cavity segment 111 and a second cavity segment 112. The length of the first cavity segment 111 is greater than the length of the second cavity segment 112. Considering that the elastic member 30 is sleeved on the inner core rod 20 and the protrusion 40 is arranged on the outer surface of the inner core rod 20, the diameter of the first cavity segment 111 is smaller than the diameter of the second cavity segment 112, thereby ensuring that the elastic member 30 and the protrusion 40 are both located in the second cavity segment 112, and the protrusion 40 can stop on the cavity mouth of the first cavity segment 111 without separating from the second cavity segment 112.

[0061] In one embodiment, the protrusion 40 is disposed in the middle of the inner core rod 20. The inner core rod 20 includes a first rod segment 21 and a second rod segment 22 connected to each other. The first rod segment 21 is located in the first cavity segment 111 and is configured to connect to the acetabular cup. The second rod segment 22 is located in the second cavity segment 112. The elastic member 30 is sleeved on the second rod segment 22. The diameter of the first rod segment 21 is larger than the diameter of the second rod segment 22. Designing the inner core rod 20 into rods of different sizes can better accommodate the installation of the elastic member 30 and its mutual adaptation to the accommodating cavity 11.

[0062] In one embodiment, Figure 1 and Figure 12 As shown, the inner core rod 20 is composed of a first rod segment 21 and a second rod segment 22. The length of the first rod segment 21 is greater than that of the second rod segment 22. The first rod segment 21 is used to connect to the acetabular cup, while the second rod segment 22 is used to sleeve the elastic member 30. The protrusion 40 is located between the first rod segment 21 and the second rod segment 22. Considering that the elastic member 30 needs to be sleeved on the second rod segment 22, the diameter of the first rod segment 21 is larger than that of the second rod segment 22, thereby accommodating the installation and accommodation of the components interchangeably.

[0063] In one embodiment, the inner core rod 20 may be composed of an independent first rod segment 21 and a second rod segment 22, with the protrusion 40 connected between the first rod segment 21 and the second rod segment 22, that is, the first rod segment 21 and the second rod segment 22 are connected via the protrusion 40. Alternatively, the first rod segment 21 and the second rod segment 22 are integrally structured, with the protrusion 40 connected to the outer surface of the first rod segment 21 and / or the second rod segment 22. Alternatively, the first rod segment 21, the second rod segment 22, and the protrusion 40 are integrally formed.

[0064] In one embodiment, the first rod segment 21 is located within the first cavity segment 111, the second rod segment 22 is located within the second cavity segment 112, and the inner core rod 20 is movable relative to the accommodating cavity 11. Therefore, the diameter of the first cavity segment 111 is larger than the diameter of the first rod segment 21, while the cross-sectional area of the protrusion 40 and the elastic member is smaller than the cross-sectional area of the second cavity segment 112. For example, when the first cavity segment 111 and the second cavity segment 112 are both cylindrical cavities, the first rod segment 21 and the second rod segment 22 can both be round rods, and the diameters of the inner core rod 20 and the accommodating cavity 11 only need to ensure that they are compatible with each other.

[0065] In one embodiment, the inner core rod 20 is provided with threads for threaded connection with the acetabular cup. One end of the inner core rod 20 is provided with threads for connecting with the threads of the acetabular cup, thereby ensuring the connection between the inner core rod 20 and the acetabular cup. When the implant is struck, the threads of the inner core rod 20 will not move relative to the threads of the acetabular cup due to the presence of the elastic member 30, thereby preventing damage to the threads of the inner core rod 20 and improving the service life of the implant.

[0066] In one embodiment, Figure 4 As shown, the elastic member 30 is a spring. The spring is sleeved on the inner core rod 20 and provides a pre-tightening force to the inner core rod 20 by compressing the spring.

[0067] In one embodiment, the elastic member 30 may be other elastic components as long as they can provide a certain pre-tightening force, such as elastic rubber.

[0068] In one embodiment, Figure 2 and Figure 4 As shown, the main body 10 includes: a main body portion 12, the main body portion 12 has at least a portion of the accommodating cavity 11; an adapter portion 13, the adapter portion 13 is arranged at one end of the main body portion 12, and is used to adapt to the acetabular cup; an end cap portion 14, the end cap portion 14 is arranged at the other end of the main body portion 12, and the elastic member 30 is clamped between the inner core rod 20 and the end cap portion 14; an unlocking wrench 15, the unlocking wrench 15 is connected to the side of the inner core rod 20 away from the adapter portion 13; wherein, the inner core rod 20 is rotatably arranged relative to the adapter portion 13, so that after the acetabular cup is installed in place, the unlocking wrench 15 drives the inner core rod 20 to rotate relative to the adapter portion 13 to disengage from the acetabular cup.

[0069] In one embodiment, the main body 10 is composed of an adapter 13, an end cap 14, and an unlocking wrench 15. During the implantation of the acetabular cup, the inner core rod 20 is fixedly connected to the acetabular cup, while the adapter 13 is connected to the acetabular cup. The two can be fixedly connected or simply limited, but it is necessary to ensure that the adapter 13 and the acetabular cup are easy to disassemble. After the acetabular cup is installed in place, the adapter 13 can play a certain role in fixing the acetabular cup, while the inner core rod 20 can rotate relative to the adapter 13. That is, when the inner core rod 20 rotates to separate from the acetabular cup, it will not cause the acetabular cup to rotate, thereby preventing the acetabular cup from moving relative to the implanted site.

[0070] In one embodiment, the inner core rod 20 is movably arranged relative to the main body 12 so that when the inner core rod 20 is rotated, the inner core rod 20 rotates relative to the main body 12 , that is, rotates relative to the adapter 13 and the main body 12 at the same time.

[0071] In one embodiment, the end cap portion 14 seals the accommodating cavity 11 of the main body portion 12 , that is, one end of the inner core rod 20 abuts against the end cap portion 14 , and one end of the elastic member 30 also abuts against the end cap portion 14 .

[0072] In one embodiment, Figure 4As shown, the end cap portion 14 includes a pressing cap 141 and a knocking cap 142, the elastic member 30 is clamped between the inner core rod 20 and the pressing cap 141, and the knocking cap 142 is sleeved on the main body portion 12, wherein the inner core rod 20 is connected to the pressing cap 141, and the pressing cap 141 can be fixedly connected to the inner core rod 20, or can be detachably connected to the inner core rod 20, for example, the pressing cap 141 is threadedly connected to the inner core rod 20, and is adjustably positioned relative to the inner core rod 20 to adjust the size of the pre-tightening force provided by the elastic member 30 to the inner core rod 20, or the pressing cap 141 is pressed into the inner core rod 20 and the two are welded, etc., which is not limited here, as long as the pressing cap 141 is ensured not to separate from the inner core rod 20. The knocking cap 142 is sleeved on the inner core rod 20, and the pressing cap 141 is located inside the knocking cap 142. For the specific structure of the pressing cap 141, please refer to Figures 6 to 8 , and the specific structure of the knock cap 142 can be found in Figure 9 .

[0073] In one embodiment, the pressing cap 141 and the knocking cap 142 may also be an integral structure, that is, it is sufficient to ensure that the end cap portion 14 can press the elastic member 30 and facilitate subsequent knocking installation.

[0074] In one embodiment, the unlocking wrench 15 is detachably connected to one end of the inner core rod 20, wherein a first connecting portion 151 is provided at one end of the unlocking wrench 15, and a second connecting portion 23 is provided at one end of the inner core rod 20. The first connecting portion 151 and the second connecting portion 23 are detachably connected. After the unlocking wrench 15 is connected to the inner core rod 20, the inner core rod 20 is driven to separate from the acetabular cup by rotating the unlocking wrench 15. The first connecting portion 151 and the second connecting portion 23 can be any structure of protrusions and depressions, as long as it can be ensured that after the unlocking wrench 15 and the inner core rod 20 are connected, the unlocking wrench 15 and the inner core rod 20 will not move relative to each other during the process of rotating the unlocking wrench 15. For the structure of the unlocking wrench 15, please refer to Figure 10 and Figure 11 , and the structure of the second connecting portion 23 can be seen in Figure 13 and Figure 14 .

[0075] In one embodiment, Figure 4As shown, the implanter includes a body 12, an inner core rod 20, an elastic member 30, a pressure cap 141, a knock cap 142, and an unlocking wrench 15 for the inner core rod 20. The body 12 is mainly used for installing, positioning, and supporting the acetabular cup, the inner core rod 20 is mainly used for connecting the acetabular cup, the release spring (elastic member 30) is mainly used to offset the recoil force, the pressure cap 141 is mainly used to block the release spring and can also adjust the preload force, the knock cap 142 is used to knock the acetabular cup during implantation, and the unlocking wrench 15 is used to unlock the inner core rod 20 after the acetabular cup is implanted. The inner core rod 20 has a stopper (protrusion 40) that limits the position of the inner core rod 20. A cavity is located between the stopper and the pressure cap 141 (the pressure cap 141 can be threaded to the body 12, can be pressed into place with a light beam and then welded, or can be replaced with a percussion cap 142). This cavity houses the anti-loosening spring, which counteracts the recoil force of the percussion during implantation and prevents the acetabular cup from loosening. To install the acetabular cup, simply align the internal thread of the acetabular cup with the external thread structure on the inner core rod 20 and rotate the cup to tighten it in place. The unlocking wrench 15 is a detachable structure and is only used when unlocking the inner core rod 20 after the acetabular cup is implanted. The unlocking method is to pass the unlocking wrench 15 through the knock cap 142 and connect it to the tail end of the inner core rod 20, and rotate the wrench counterclockwise (the above explanation is right-handed thread, and left-handed is the opposite. Among them, when the right-handed thread is unlocked, rotate the unlocking wrench 15 counterclockwise, and when the left-handed thread is unlocked, rotate the unlocking wrench 15 clockwise). It can drive the inner core rod 20 to rotate, thereby unlocking it. The interface between the unlocking wrench 15 and the inner core rod 20 is a matching relationship between a male head and a female head. The shape of the inner core rod tail cap can be commonly used unlocking shapes such as straight-line, cross-shaped, hexagonal, plum blossom-shaped, square, etc.

[0076] The implanter of the present invention is an acetabular cup implanter, whose main function is to hold and implant the acetabular cup. The acetabular cup implanter mainly consists of three key components: a main body 10, an inner core rod 20 and an anti-loosening spring (elastic member 30). The inner core rod 20 is threadedly connected to the acetabular cup. The inner core rod 20 runs through the entire main body 10. There is a blocking platform (protrusion 40) at its tail to limit the position of the inner core rod 20. The anti-loosening spring is inserted into the rear part of the blocking platform. The two ends of the spring are in contact with the blocking platform and the main body 10 respectively, and generate a certain pre-tightening force. When the acetabular cup implanter is implanting the acetabular cup, the anti-loosening spring keeps pressurizing the blocking platform due to the pre-tightening force to prevent the inner core rod 20 from loosening, offsetting the recoil force, and preventing the threaded connection from loosening, thereby avoiding thread loosening and thread failure. The anti-loosening spring is located at the rear of the blocking platform. Figure 16 As shown in the figure, when the tail end is hit with a hammer, the direction of the force is as follows Figure 16The direction of the recoil force is shown in ①, and the direction of the recoil force is shown in ②. Since the preload force generated by the anti-loosening spring located at the rear of the blocking platform is shown in ③, the forces in ② and ③ are in opposite directions and cancel each other out. The inner core rod 20 is separated from the main body 10. When the implant is complete and the device needs to be removed, simply rotate the inner core rod 20 to unlock the connection, thus preventing the implanted acetabular cup from loosening.

[0077] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and illustrative embodiments are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0078] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An implanter, characterized in that: include: A main body (10), wherein the main body (10) has a receiving cavity (11); An inner core rod (20), the inner core rod (20) being disposed in the accommodating cavity (11), and the inner core rod (20) being used to connect with the acetabulum cup; an elastic member (30), wherein the elastic member (30) is disposed in the accommodating cavity (11), one end of the elastic member (30) abuts against the inner core rod (20), and the other end of the elastic member (30) abuts against the main body (10) to provide a pre-tightening force to the inner core rod (20) in the direction of the acetabular cup; An annular protrusion (40) is provided on the inner core rod (20), one end of the protrusion (40) facing the acetabular cup abuts against the main body (10), and the other end of the protrusion (40) abuts against the elastic member (30); The accommodating cavity (11) comprises: A first cavity segment (111), the first cavity segment (111) being arranged on a side of the main body (10) close to the acetabular cup; a second cavity segment (112), the second cavity segment (112) being arranged on a side of the main body (10) away from the acetabular cup, the first cavity segment (111) being communicated with the second cavity segment (112), and the diameter of the first cavity segment (111) being smaller than the diameter of the second cavity segment (112); Wherein, the elastic member (30) and the protrusion (40) are both located in the second cavity segment (112), and the protrusion (40) is stopped on the cavity opening of the first cavity segment (111); The protrusion (40) is arranged in the middle of the inner core rod (20), and the inner core rod (20) includes a first rod segment (21) and a second rod segment (22) connected to each other, the first rod segment (21) is located in the first cavity segment (111) and is used to connect with the acetabular cup, the second rod segment (22) is located in the second cavity segment (112), and the elastic member (30) is sleeved on the second rod segment (22); wherein the diameter of the first rod segment (21) is larger than the diameter of the second rod segment (22); The main body (10) comprises: a main body portion (12), the main body portion (12) having at least a portion of the accommodating cavity (11); An adapting portion (13), the adapting portion (13) being arranged at one end of the main body (12) and adapted to be adapted to the acetabular cup; An end cap portion (14), the end cap portion (14) being arranged at the other end of the main body portion (12), and the elastic member (30) being sandwiched between the inner core rod (20) and the end cap portion (14); one end of the inner core rod (20) abuts against the end cap portion (14), and one end of the elastic member (30) also abuts against the end cap portion (14); An unlocking wrench (15) is connected to a side of the inner core rod (20) away from the adapting portion (13); wherein one end of the unlocking wrench (15) is provided with a first connecting portion (151), and one end of the inner core rod (20) is provided with a second connecting portion (23), the first connecting portion (151) and the second connecting portion (23) are detachably connected, and after the unlocking wrench (15) is connected to the inner core rod (20), the inner core rod (20) is driven to separate from the acetabular cup by rotating the unlocking wrench (15); The inner core rod (20) is rotatably arranged relative to the adapter (13), so that after the acetabular cup is installed in place, the unlocking wrench (15) drives the inner core rod (20) to rotate relative to the adapter (13) to disengage from the acetabular cup; The end cap portion (14) comprises a pressing cap (141) and a knocking cap (142), the elastic member (30) is sandwiched between the inner core rod (20) and the pressing cap (141), and the knocking cap (142) is sleeved on the main body portion (12), wherein the inner core rod (20) is connected to the pressing cap (141), and the pressing cap (141) is connected to the inner core rod (20).

2. The implanter according to claim 1, wherein The inner core rod (20) is movably arranged relative to the axial direction of the main body (10).

3. The implanter according to claim 1, wherein: The inner core rod (20) and the protrusion (40) are integrally formed.

4. The implanter according to claim 1, wherein: The inner core rod (20) and the protrusion (40) are composed of two independent components combined into an integral structure.

5. The implanter according to any one of claims 1 to 4, characterized in that The inner core rod (20) is provided with a thread for threaded connection with the acetabulum cup.

6. The implanter according to any one of claims 1 to 4, characterized in that The elastic member (30) is a spring.

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