Acetabular cup insertion device and joint replacement device

Abstract

The present disclosure provides a cup impactor and a joint replacement device. The cup impactor includes a striking cylinder, a driving rod, a plurality of clamping arms, a moving rod, and a guiding assembly. The striking cylinder has a first end and a second end that are in communication. The driving rod is rotatably inserted into the first end. The plurality of clamping arms are distributed on the outer periphery of the second end and all extend in a direction away from the first end of the second end, and each clamping arm is hinged to the striking cylinder. The moving rod has a driving end and an abutting end. The driving end is movably inserted into the second end and is threadedly connected to the driving rod. The moving rod is connected to the striking cylinder through the guiding assembly to guide the moving rod to move axially. The plurality of clamping arms are arranged around the abutting end. By rotating the driving rod, the moving rod can be driven to move axially away from the first end of the striking cylinder, so as to abut against each clamping arm through the abutting end, causing the clamping arms to rotate outwards. The present disclosure enables the cup to be more conveniently fixed to the impactor.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and particularly to a cup inserter and a joint replacement device. Background Art

[0002] In joint replacement surgery, it is necessary to fix the cup to the cup inserter, and then apply an impact load to the cup through the cup inserter to drive the cup into a predetermined position.

[0003] In order to fix the cup to the cup inserter, a threaded hole is often provided at the bottom of the cup, and the cup inserter is threadedly connected to the threaded hole. However, the threaded hole is easily damaged, making it difficult to fix the cup to the cup inserter. In addition, after the cup is driven into the predetermined position, it is necessary to drive the cup liner into the cup. Among them, the debris generated during the driving process of the cup liner easily enters the bone surface through the threaded hole, affecting the bonding between the bone and the cup.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a cup inserter and a joint replacement device, which do not require a threaded hole at the bottom of the cup, avoid debris from entering the bone surface, and at the same time can fix the cup to the cup inserter more conveniently.

[0006] According to one aspect of the present disclosure, a cup inserter is provided, including:

[0007] A striking cylinder having a through first end and a second end;

[0008] A driving rod rotatably extending into the first end;

[0009] A plurality of clamping arms distributed on the outer periphery of the second end of the striking cylinder and all extending in the direction away from the first end of the second end, each clamping arm being hinged to the striking cylinder;

[0010] A moving rod having a driving end and an abutting end, the driving end movably extending into the second end of the striking cylinder and threadedly connected to the driving rod, and the plurality of clamping arms being arranged around the abutting end;

[0011] A guiding assembly, the moving rod being connected to the inner wall of the striking cylinder through the guiding assembly, and the guiding assembly being used to guide the moving rod to move axially;

[0012] By rotating the driving rod, the moving rod can be driven to move axially away from the first end, so as to abut against each clamping arm through the abutting end, and each clamping arm is rotated outwards.

[0013] In an exemplary embodiment of the present disclosure, the acetabular cup driving device further includes:

[0014] A positioning member, connected to the striking cylinder, and capable of abutting against the driving rod or separating from the driving rod.

[0015] In an exemplary embodiment of the present disclosure, the distance between the side of each clamping arm facing the moving rod and the axis of the moving rod gradually decreases along the extending direction.

[0016] In an exemplary embodiment of the present disclosure, the abutting end is provided with a plurality of sliding grooves, and each clamping arm is correspondingly matched and passes through each sliding groove.

[0017] In an exemplary embodiment of the present disclosure, the groove wall of the sliding groove has a sliding member, and the side wall of the clamping arm facing the groove wall has a convex rib extending along the extending direction, and the sliding member is slidably abutted against the side of the convex rib close to the moving rod.

[0018] In an exemplary embodiment of the present disclosure, the guiding assembly includes:

[0019] A first limiting member, provided on the inner wall of the striking cylinder;

[0020] A second limiting member, provided on the outer periphery of the moving rod, and the second limiting member is slidably matched with the first limiting member in the axial direction of the striking cylinder.

[0021] In an exemplary embodiment of the present disclosure, the first limiting member is a protrusion, the second limiting member is a groove, and at least one of the first limiting member and the second limiting member extends along a direction parallel to the axial direction of the striking cylinder; or, the first limiting member is a groove, the second limiting member is a protrusion, and at least one of the first limiting member and the second limiting member extends along a direction parallel to the axial direction of the striking cylinder.

[0022] In an exemplary embodiment of the present disclosure, a first protruding portion is provided on the side of each clamping arm facing away from the moving rod, and a second protruding portion is provided at one end of each clamping arm away from the striking cylinder.

[0023] According to one aspect of the present disclosure, a joint replacement device is provided, including an acetabular cup and the acetabular cup driving device described in any one of the above.

[0024] In an exemplary embodiment of the present disclosure, a plurality of recessed portions are provided on the end face of the cup opening of the acetabular cup. Each of the recessed portions has an abutting surface inclined relative to the end face, and the included angle between the end face and the abutting surface is an acute angle. A second protruding portion is provided at one end of each clamping arm away from the striking cylinder, and one surface of each second protruding portion facing away from the striking cylinder can be in one-to-one fit with a plurality of the abutting surfaces.

[0025] For the acetabular cup driving device and joint replacement device of the present disclosure, by rotating the driving rod, the moving rod can be driven to move axially away from the first end of the striking cylinder, so as to abut against each clamping arm through the abutting end of the moving rod, and each clamping arm can be rotated outwards, so that each clamping arm can abut against the inner side of an acetabular cup, making it more convenient to fix the acetabular cup to the driving device. There is no need to provide a threaded hole at the bottom of the acetabular cup, reducing the processing procedures, increasing the contact area between the acetabular cup and the bone surface, and also avoiding debris from entering the bone surface through the threaded hole; while effectively fixing the acetabular cup, the acetabular cup can also be driven into the bone by this device, and the same instrument is used to realize the fixation and driving of the acetabular cup. At the same time, an acetabular cup driving device can be applicable to multiple acetabular cups with different specifications, reducing the number of instruments.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the accompanying drawings to describe its exemplary embodiments in detail, the above and other features and advantages of the present disclosure will become more obvious. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Schematic diagram of the acetabular cup driving device according to the embodiment of the present disclosure;

[0029] Figure 2 Exploded schematic diagram of the acetabular cup driving device according to the embodiment of the present disclosure;

[0030] Figure 3 Schematic diagram of the acetabular cup driving device and the acetabular cup according to the embodiment of the present disclosure;

[0031] Figure 4 Schematic diagram when the positioning member is at a preset position according to the embodiment of the present disclosure;

[0032] Figure 5 Schematic diagram after the positioning member rotates a preset angle from the preset position according to the embodiment of the present disclosure;

[0033] Figure 6Schematic three-dimensional view of the clamping arm of the acetabular cup driving device according to the embodiment of the present disclosure;

[0034] Figure 7 Schematic plan view of the clamping arm of the acetabular cup driving device according to the embodiment of the present disclosure;

[0035] Figure 8 Schematic view of the guiding assembly of the acetabular cup driving device according to the embodiment of the present disclosure;

[0036] Figure 9 Top view of the acetabular cup according to the embodiment of the present disclosure;

[0037] Figure 10 Cross-sectional view of the acetabular cup according to the embodiment of the present disclosure.

[0038] In the figure: 1, striking cylinder; 101, first end; 102, second end; 103, first limiting member; 2, driving rod; 3, clamping arm; 31, convex rib; 32, first protruding portion; 33, second protruding portion; 4, moving rod; 401, abutting end; 402, driving end; 403, second limiting member; 5, turntable; 6, acetabular cup; 61, recessed portion; 62, end face; 63, abutting surface; 7, positioning member; 8, sliding groove; 9, convex strip; 10, thread; 11, sliding member; 12, enlarged head; 13, through hole; 14, annular groove; 15, groove. Specific embodiments

[0039] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, materials, devices, etc. can be used. In other cases, well-known technical solutions are not shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the figures denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0040] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated description will be omitted. The terms "a" and "the" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.

[0041] Embodiments of the present disclosure provide a cup insertion device. As Figure 1 and Figure 2 shown, the cup insertion device may include a striking cylinder 1, a driving rod 2, a plurality of clamping arms 3, a moving rod 4, and a guiding assembly, wherein:

[0042] The striking cylinder 1 has a through first end 101 and a second end 102. The driving rod 2 is rotatably inserted into the first end 101 of the striking cylinder 1. The plurality of clamping arms 3 are distributed on the outer periphery of the second end 102 of the striking cylinder 1 and all extend in the direction away from the first end 101 of the second end 102, and each clamping arm 3 is hinged to the striking cylinder 1. The moving rod 4 has a driving end 402 and an abutting end 401. The driving end 402 is movably inserted into the second end 102 of the striking cylinder 1 and is threadedly connected to the driving rod 2. The moving rod 4 is connected to the inner wall of the striking cylinder 1 through a guiding assembly. The guiding assembly is used to guide the moving rod 4 to move axially. The plurality of clamping arms 3 are arranged around the abutting end 401. By rotating the driving rod 2, the moving rod 4 can be driven to move axially away from the first end 101 of the striking cylinder 1, so as to abut against each clamping arm 3 through the abutting end 401, and each clamping arm 3 is rotated outwards.

[0043] As Figures 1 to 3 shown, for the cup insertion device according to the embodiments of the present disclosure, by rotating the driving rod 2, the moving rod 4 can be driven to move axially away from the first end 101 of the striking cylinder 1, so as to abut against each clamping arm 3 through the abutting end 401 of the moving rod 4, and each clamping arm 3 is rotated outwards, so that each clamping arm 3 can abut against the inner side of a cup 6, making it more convenient to fix the cup 6 to the insertion device, eliminating the need to provide a threaded hole at the bottom of the cup 6, reducing the processing procedures, increasing the contact area between the cup 6 and the bone surface, and also avoiding debris from entering the bone surface through the threaded hole; at the same time, a cup insertion device can be applicable to a plurality of cups 6 with different specifications, reducing the number of instruments.

[0044] The following will detail each part of the cup insertion device according to the embodiments of the present disclosure:

[0045] As Figure 2As shown, the cross-section of the striking cylinder 1 can be circular, but not limited thereto, and can also be rectangular or other shapes. Both ends of the striking cylinder 1 are open ends to accommodate the above-mentioned moving rod 4 and driving rod 2. In the present disclosure, one end of the striking cylinder 1 is referred to as the first end 101, and the other end is referred to as the second end 102. A plurality of ridges 9 can be provided on the outer peripheral surface of the first end 101 of the striking cylinder 1. The plurality of ridges 9 can be distributed along the circumferential direction of the striking cylinder 1, and each ridge 9 can extend along the axial direction of the striking cylinder 1. By rotating the driving rod 2 to make the driving rod 2 rotate relative to the striking cylinder 1, the provided ridges 9 can increase the friction force and improve the stability of the striking cylinder 1.

[0046] As Figure 2 shown, the driving rod 2 is used to drive the moving rod 4 to move along the axial direction of the striking cylinder 1. The above-mentioned striking cylinder 1 is sleeved on the driving rod 2, and one end of the driving rod 2 extends out of the first end 101 of the striking cylinder 1. The material of the driving rod 2 can be steel to endow it with good strength. Of course, the material of the driving rod 2 can also be iron or other materials with good strength. One end of the driving rod 2 away from the striking cylinder 1 can be a striking end for bearing a striking load to drive the acetabular cup 6 into a predetermined position, avoiding the setting of additional components to form the striking end, simplifying the structure and facilitating the operation. Among them, a turntable 5 can be fixedly provided at one end of the driving rod 2 away from the striking cylinder 1. The turntable 5 can have the same axis as the driving rod 2, and the area of the turntable 5 is larger than the cross-sectional area of the driving rod 2, thereby increasing the stress area of the driving rod 2 and making the striking load easily applied to the driving rod 2. In addition, the driving rod 2 can rotate relative to the striking cylinder 1, and the present disclosure embodiment does not make special limitations on the rotation angle of the driving rod 2. Among them, the driving rod 2 can be rotated manually, and of course, it can also be driven to rotate by a driving mechanism. The driving mechanism can be a motor, but not limited thereto, and can also be other driving mechanisms such as a cylinder. In addition, a thread 10 is provided at one end of the driving rod 2.

[0047] As Figure 2 shown, the acetabular cup driving device of the present disclosure can further include a positioning member 7. The positioning member 7 can be connected to the striking cylinder 1 and can abut against the driving rod 2 or be separated from the driving rod 2. For example, the positioning member 7 is an eccentric rod structure, passed through the through hole 13 of the striking cylinder 1 and located between the striking cylinder 1 and the driving rod 2. As Figure 4 shown, when the positioning member 7 rotates to a preset position, the positioning member 7 is separated from the driving rod 2 so that the driving rod 2 can rotate relative to the striking cylinder 1; as Figure 5As shown, after the positioning member 7 is rotated by a preset angle from a preset position, one side of the positioning member 7 abuts against the inner wall of the striking cylinder 1 or the inner surface of the through hole 13, and the other side of the positioning member 7 abuts against the driving rod 2, so that the driving rod 2 cannot rotate relative to the striking cylinder 1. When the striking turntable 5 is struck, the striking load is transmitted to the striking cylinder 1. Preferably, an enlarged head 12 may be provided on the part of the striking cylinder 1 where the positioning member 7 is provided, and the above-mentioned through hole 13 may be provided in the enlarged head 12 for the positioning member 7 having an eccentric rod structure to pass through; a ring groove 14 may be provided on the part of the driving rod 2 located in the enlarged head 12, so that the eccentric member structure passes through the through hole 13 of the striking cylinder 1 and passes through the ring groove 14.

[0048] As Figures 1 to 3 shown, the clamping arm 3 is used to clamp a cup 6 to be driven in. The number of the clamping arms 3 of the present disclosure may be two, three, four, etc., but is not limited thereto, and may also be more. Among them, a plurality of clamping arms 3 may be distributed along the circumferential direction of the striking cylinder 1. One end of each clamping arm 3 is hinged to the outer peripheral surface of the second end 102 of the striking cylinder 1. The distance between the side of each clamping arm 3 facing the moving rod 4 and the axis of the moving rod 4 gradually decreases along the extending direction of the clamping arm 3, so that the moving rod 4 moving axially away from the first end 101 of the striking cylinder 1 can abut against each clamping arm 3 to cause each clamping arm 3 to rotate outwards. The axis of the moving rod 4 may be the central axis of the moving rod 4. For example, a connecting shaft is provided at one end of each clamping arm 3, and a plurality of bushings are provided on the outer peripheral surface of the second end 102 of the striking cylinder 1, and the plurality of connecting shafts are rotationally matched with the plurality of bushings one by one. Among them, each connecting shaft may be perpendicular to the axis of the striking cylinder 1. Each clamping arm 3 extends in the direction away from the first end 101 of the second end 102 of the striking cylinder 1, and the dimension of each clamping arm 3 in the radial direction of the striking cylinder 1 gradually increases along the extending direction of each clamping arm 3. When each clamping arm 3 rotates outwards to be away from the above-mentioned moving rod 4, the end of each clamping arm 3 away from the striking cylinder 1 can abut against the inner side of the cup 6 to fix the cup 6 to the cup driving device of the present disclosure.

[0049] As Figure 6 and Figure 7 shown, a first protrusion 32 is provided on the side of each clamping arm 3 facing away from the moving rod 4, and a second protrusion 33 is provided at the end of each clamping arm 3 away from the striking cylinder 1. Among them, when each clamping arm 3 rotates outwards, the second protrusion 33 can abut against the inner side of the cup 6 to clamp the cup 6; the first protrusion 32 can abut against the cup mouth end face 62 of the cup 6, so that the striking load borne by the driving rod 2 can also be applied to the cup mouth end face 62 of the cup 6 through each clamping arm 3, so that the load received by the cup 6 is greater, more uniform, and more stable, and at the same time, the phenomenon of stress concentration on the inner side of the cup 6 is avoided.

[0050] As Figure 2As shown, the moving rod 4 can reciprocate axially along the striking cylinder 1 to abut against each support arm, causing each support arm to rotate outwards. The cross-section of the moving rod 4 can be circular, rectangular, etc. Of course, it can also be a regular shape such as trapezoidal. In other embodiments of the present disclosure, the cross-section of the moving rod 4 can also be an irregular shape. The material of the moving rod 4 can be the same as that of the driving rod 2, but this is not a limitation, and it can also be different. For example, the material of the moving rod 4 is the same as that of the driving rod 2, and both are steel. The moving rod 4 has a driving end 402 and an abutting end 401. The above-mentioned striking cylinder 1 can be sleeved on the moving rod 4, and the driving end 402 of the moving rod 4 is threadedly connected to the end of the driving rod 2 located inside the striking cylinder 1. The abutting end 401 of the moving rod 4 extends out of the striking cylinder 1, and a plurality of clamping arms 3 are arranged around the abutting end 401.

[0051] Optionally, as Figure 2 shown, the abutting end 401 can be provided with a plurality of sliding grooves 8. The number of the sliding grooves 8 can be the same as the number of the clamping arms 3, and the plurality of clamping arms 3 pass through the plurality of sliding grooves 8 in a one-to-one correspondence, preventing the clamping arms 3 from disengaging from both sides of the sliding grooves 8, so that the clamping arms 3 can rotate outwards away from the moving rod 4. In addition, the groove wall of the sliding groove 8 can have a sliding member. The sliding member can be cylindrical, but is not limited thereto, and can also be other shapes such as cuboid. In one embodiment, as Figure 6 and Figure 7 shown, the side wall of the clamping arm 3 facing the groove wall of the sliding groove 8 can be provided with a convex rib 31. The convex rib 31 can extend along the extending direction of the clamping arm 3. When each clamping arm 3 passes through each sliding groove 8, each sliding member 11 can slidably abut against the side of each convex rib 31 close to the moving rod 4. In another embodiment, the side wall of the clamping arm 3 facing the groove wall of the sliding groove 8 can be provided with a strip-shaped groove. The strip-shaped groove can extend along the extending direction of the clamping arm 3. When each clamping arm 3 passes through each sliding groove 8, each sliding member 11 can slidably cooperate with each strip-shaped groove.

[0052] The moving rod of the present disclosure can be connected to the inner wall of the striking cylinder through a guiding assembly. The guiding assembly is used to guide the moving rod to move axially along the striking cylinder to prevent the moving rod from rotating relative to the striking cylinder. During the use of the acetabular cup driving device of the present disclosure, the striking cylinder is held by hand and the driving rod is rotated. Since the driving rod is threadedly connected to the moving rod, and the guiding assembly can prevent the moving rod from rotating relative to the striking cylinder, the moving rod moves axially along the striking cylinder. Among them, as Figure 8As shown, the guiding assembly may include a first limiting member 103 and a second limiting member 403. The first limiting member 103 may be provided on the inner wall of the striking cylinder 1, and the second limiting member 403 may be provided on the outer periphery of the moving rod 4. The second limiting member 403 and the first limiting member 103 may be slidably engaged axially of the striking cylinder 1. In one embodiment, the first limiting member 103 is a protrusion, and the second limiting member 403 is a groove, and at least one of the protrusion and the groove extends along an axis parallel to the striking cylinder 1.

[0053] In other embodiments of the present disclosure, the first limiting member is a groove, the second limiting member is a protrusion, and at least one of the first limiting member and the second limiting member extends along an axis parallel to the striking cylinder.

[0054] The embodiments of the present disclosure also provide an arthroplasty device. The arthroplasty device may include an acetabular cup and the acetabular cup driving device described in any of the above embodiments. Of course, it may also include other components such as an acetabular cup liner, which will not be elaborated here. Among them, the material of the liner may be ultra-high molecular weight polyethylene. The acetabular cup driving device adopted by the arthroplasty device of the present disclosure is the same as the acetabular cup driving device in the embodiments of the above acetabular cup driving device, and thus has the same beneficial effects, which will not be repeated here.

[0055] As Figure 6 、 Figure 9 and Figure 10 As shown, the cup end face 62 of the acetabular cup 6 in the embodiments of the present disclosure may be provided with a plurality of recesses 61, that is, the number of recesses 61 is at least two. Each recess 61 has an abutting surface 63 inclined relative to the cup end face 62, and the angle A between the cup end face 62 and the abutting surface 63 is an acute angle; a second protrusion 33 is provided at one end of each clamping arm 3 away from the striking cylinder 1, and one surface of each second protrusion 33 facing away from the striking cylinder 1 can be in one-to-one fit with a plurality of abutting surfaces 63. Among them, each abutting surface 63 is an arc surface. Further, the abutting surface 63 may be a conical surface. The conical surface may include two parallel arc-shaped edges. In addition, as Figure 9 shown, a plurality of grooves 15 are evenly provided at the cup mouth of the acetabular cup 6 in the related art for matching with the liner. The recesses 61 of the present disclosure partially overlap with the grooves, which does not affect the cooperation between the liner and the acetabular cup 6.

[0056] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practice. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A cup implanting device, characterized in that, it includes: a striking cylinder having a through first end and a second end; a driving rod rotatably extending into the first end; a plurality of clamping arms distributed on the outer periphery of the second end of the striking cylinder and all extending in a direction away from the first end of the second end, and each clamping arm is hinged to the striking cylinder; a moving rod having a driving end and an abutting end, the driving end movably extending into the second end of the striking cylinder and threadedly connected to the driving rod, and the plurality of clamping arms are arranged around the abutting end; a plurality of sliding grooves are provided at the abutting end, and each clamping arm correspondingly passes through each sliding groove; a guiding assembly, the moving rod is connected to the striking cylinder through the guiding assembly, and the guiding assembly is used to guide the moving rod to move axially; by rotating the driving rod, the moving rod can be driven to move axially away from the first end, so as to abut against each clamping arm through the abutting end, and each clamping arm is rotated outwards; the guiding assembly includes: a first limiting member provided on the inner wall of the striking cylinder; a second limiting member provided on the outer periphery of the moving rod, and the second limiting member is slidably engaged with the first limiting member in the axial direction of the striking cylinder; wherein, the first limiting member is a protrusion, the second limiting member is a groove, and at least one of the first limiting member and the second limiting member extends along a direction parallel to the axial direction of the striking cylinder; or, the first limiting member is a groove, the second limiting member is a protrusion, and at least one of the first limiting member and the second limiting member extends along a direction parallel to the axial direction of the striking cylinder.

2. The cup implanting device according to claim 1, characterized in that, the cup implanting device further includes: a positioning member connected to the striking cylinder and capable of abutting against the driving rod or separating from the driving rod.

3. The cup implanting device according to claim 1, characterized in that, the distance between the side of each clamping arm facing the moving rod and the axis of the moving rod gradually decreases along the extending direction.

4. The cup implanting device according to claim 1, characterized in that, the groove wall of the sliding groove has a sliding member, and the side wall of the clamping arm facing the groove wall has a convex rib extending along the extending direction, and the sliding member is slidably abutted against the side of the convex rib close to the moving rod.

5. The cup implanting device according to claim 1, characterized in that, a first protruding portion is provided on the side of each clamping arm facing away from the moving rod, and a second protruding portion is provided at one end of each clamping arm away from the striking cylinder.

6. An arthroplasty device, characterized in that, it includes a cup and the cup implanting device according to any one of claims 1-5.

7. The arthroplasty device according to claim 6, characterized in that, a plurality of recessed portions are provided on the cup end face of the cup, each recessed portion has an abutting surface inclined relative to the cup end face, and the included angle between the cup end face and the abutting surface is an acute angle, a second protruding portion is provided at one end of each clamping arm away from the striking cylinder, and one surface of each second protruding portion facing away from the striking cylinder can be correspondingly attached to the plurality of abutting surfaces.

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