Lateral malleolus bone penetrating and suturing auxiliary tool

Abstract

The utility model provides a lateral malleolus bone penetrating and suturing auxiliary tool. The lateral malleolus bone penetrating and suturing auxiliary tool comprises an angle adjusting assembly, a lateral malleolus bone drilling auxiliary assembly and a lateral malleolus tip initial positioning assembly. Wherein the angle adjusting assembly comprises an arc-shaped sleeve and an arc-shaped inner rod, a locking piece used for locking the arc-shaped inner rod is arranged on the arc-shaped sleeve, and one end of the arc-shaped inner rod is movably inserted into one end of the arc-shaped sleeve; wherein the lateral malleolus bone drilling auxiliary assembly comprises a first round sleeve, a second round sleeve, a first cylindrical hollow barrel and a second cylindrical hollow barrel, and the first round sleeve is fixedly installed at the other end of the arc-shaped sleeve. According to the lateral malleolus bone penetrating and suturing auxiliary tool, an angled bone tunnel of the lateral malleolus can be conveniently and accurately manufactured, ligament tissue at the bone position of the lateral malleolus can be conveniently sutured in a threading mode through the bone tunnel, working efficiency can be greatly improved, and more importantly, the situation that holes need to be drilled again, and extra large injuries are caused to a patient can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an auxiliary tool for transosseous suturing of the lateral ankle. Background Art

[0002] The ankle joint is composed of the distal end of the tibia, the distal end of the fibula and the body of the talus. The medial protrusion of the distal end of the tibia is the medial malleolus, and the protrusion of the distal end of the fibula is the lateral malleolus. The lateral malleolus protrudes from the surface and is slightly posterior to the medial malleolus. The distal end of the lateral malleolus is 1-1.5cm lower than the distal end of the medial malleolus and 1cm posterior. The medial malleolus, lateral malleolus and articular surface of the lower end of the tibia form the ankle cavity. The lateral malleolus is the ankle bone located on the outside of the human body and is the protrusion of the distal end of the fibula. The lateral malleolus is lower and posterior to the medial malleolus, making it prone to ankle fractures.

[0003] At present, when suturing ligament tissue at the lateral malleolus, it is necessary to make an angled bone tunnel at the lateral malleolus to facilitate threading and suturing the ligament tissue. The current method for making the angled bone tunnel at the lateral malleolus is: the doctor uses a drill tool to drill two angled connected holes at the lateral malleolus of the patient based on experience. However, it is still easy to make mistakes based on experience. The two angled holes drilled often misalign with each other, resulting in a disconnected situation, and the holes need to be re-drilled, which not only affects work efficiency, but more importantly, will cause additional greater harm to the patient.

[0004] Therefore, a lateral malleolus transosseous suturing auxiliary tool is proposed. Utility Model Content

[0005] The utility model aims to solve the problems raised in the background technology and provides an auxiliary tool for transosseous suturing of the lateral ankle.

[0006] The specific technical solutions are as follows:

[0007] A lateral ankle transosseous suturing auxiliary tool, comprising:

[0008] An angle adjustment assembly, the angle adjustment assembly comprises an arc-shaped sleeve and an arc-shaped inner rod, the arc-shaped sleeve is provided with a locking member for locking the arc-shaped inner rod, one end of the arc-shaped inner rod is movably inserted into one end of the arc-shaped sleeve;

[0009] A lateral malleolus drilling auxiliary component, the lateral malleolus drilling auxiliary component comprises a first round sleeve, a second round sleeve, a first cylindrical hollow cylinder and a second cylindrical hollow cylinder, the first round sleeve is fixedly mounted on the other end of the arc-shaped sleeve, the second round sleeve is mounted on the other end of the arc-shaped inner rod through a connecting piece, the first cylindrical hollow cylinder penetrates the first round sleeve, and the first cylindrical hollow cylinder is threadedly connected to the first round sleeve, the second cylindrical hollow cylinder penetrates the second round sleeve, and the second cylindrical hollow cylinder is threadedly connected to the second round sleeve;

[0010] The lateral malleolus initial positioning component includes a connecting rod and a lateral malleolus initial positioning plate. The connecting rod is fixedly installed at the junction of the second circular sleeve and the connecting piece, and the connecting rod is located below the arc-shaped inner rod and is inclined toward one side of the arc-shaped sleeve. The lateral malleolus initial positioning plate can be adjusted and sleeved on the connecting rod.

[0011] As a preferred solution of the utility model, the locking piece is arranged near the end of the arc-shaped sleeve away from the first round sleeve, and the locking piece includes a threaded sleeve and a locking screw, the threaded sleeve is fixedly mounted on the side wall of the arc-shaped sleeve, the screw of the locking screw is threaded on the threaded sleeve, and the distal end of the screw of the locking screw is tightly pressed against the surface of the arc-shaped inner rod.

[0012] As a preferred solution of the utility model, the arc-shaped inner rod and the arc-shaped sleeve cannot rotate relative to each other after being assembled.

[0013] As a preferred solution of the utility model, the connecting member includes a connecting seat and a fixing screw, the connecting seat is fixedly mounted on the outer side of the second circular sleeve, one end of the arc-shaped inner rod located outside the arc-shaped sleeve is inserted into the interior of the connecting seat, the screw of the fixing screw is screwed on the connecting seat, and the distal end of the screw of the fixing screw is tightly pressed against the surface of the arc-shaped inner rod.

[0014] As a preferred solution of the utility model, a plurality of mounting holes arranged side by side are provided on the lateral malleolus initial positioning plate, and a plurality of sleeves arranged side by side are fixedly installed on the lateral malleolus initial positioning plate, the sleeves are arranged in one-to-one correspondence with the mounting holes, and threaded holes are provided on the side walls of the sleeves, an adjusting screw is threaded in the threaded hole, the connecting rod passes through one of the mounting holes and one of the sleeves at the corresponding position, and the distal end of the screw of the adjusting screw is tightly pressed against the surface of the connecting rod.

[0015] As a preferred solution of the utility model, a first cylindrical handle is fixedly mounted on one end of the first cylindrical hollow tube, and the first cylindrical handle is coaxial with and connected to the first cylindrical hollow tube.

[0016] As a preferred solution of the utility model, the outer surface of the first cylindrical hollow tube is provided with a first external thread, and the inner surface of the first round sleeve is provided with a first internal thread matching the first external thread.

[0017] As a preferred solution of the utility model, a second cylindrical handle is fixedly installed on one end of the second cylindrical hollow tube, and the second cylindrical handle is coaxial with and connected to the second cylindrical hollow tube.

[0018] As a preferred solution of the utility model, the outer surface of the second cylindrical hollow tube is provided with a second external thread, and the inner surface of the second sleeve is provided with a second internal thread matching the second external thread.

[0019] The utility model has the following beneficial effects:

[0020] The utility model provides an auxiliary tool for trans-bone suturing of the lateral malleolus, which is composed of an angle adjustment component, an auxiliary component for drilling holes in the lateral malleolus, and an initial positioning component for the lateral malleolus tip. The angle adjustment component is mainly composed of an arc-shaped sleeve and an arc-shaped inner rod. The auxiliary component for drilling holes in the lateral malleolus is mainly composed of a first round sleeve, a second round sleeve, a first cylindrical hollow tube, and a second cylindrical hollow tube. The initial positioning component for the lateral malleolus tip is mainly composed of a connecting rod and an initial positioning plate for the lateral malleolus tip. When in use, the angle between the first cylindrical hollow tube and the second cylindrical hollow tube is adjusted by adjusting the position of one end of the arc-shaped inner rod inside the arc-shaped sleeve, and then the position of the initial positioning plate for the lateral malleolus tip is adjusted on the connecting rod. The distal end of the lateral malleolus initial positioning plate can be placed at the initial position of the lateral malleolus of the lateral malleolus bone, and then the first cylindrical hollow tube and the second cylindrical hollow tube are rotated respectively so that the distal ends of the first cylindrical hollow tube and the second cylindrical hollow tube are against the side of the lateral malleolus bone, and then the drill bit of the drilling tool can be passed through the first cylindrical hollow tube and the second cylindrical hollow tube to drill holes in the lateral malleolus bone, and the two angled holes drilled are connected to each other, so that an angled bone channel of the lateral malleolus can be produced, and the ligament tissue at the lateral malleolus bone position can be sutured through the bone channel, which can greatly improve work efficiency. More importantly, it can effectively avoid the need for re-drilling to cause additional greater harm to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a lateral ankle transbone suturing auxiliary tool provided by an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of the lateral ankle bone transosseous suture auxiliary tool provided by the embodiment of the utility model from another perspective Figure 1 ;

[0023] Figure 3 A schematic diagram of the structure of the lateral ankle bone transosseous suture auxiliary tool provided by the embodiment of the utility model from another perspective Figure 2 ;

[0024] Figure 4 A schematic diagram of the application of the lateral ankle transosseous suturing auxiliary tool provided in an embodiment of the utility model.

[0025] In the attached figure:

[0026] 1. arc-shaped sleeve; 101. arc-shaped inner rod; 102. locking screw; 103. threaded sleeve;

[0027] 2. First round sleeve; 201. Second round sleeve; 202. First cylindrical hollow cylinder; 203. First cylindrical handle; 204. Second cylindrical hollow cylinder; 205. Connecting seat; 206. Fixing screw; 207. Second cylindrical handle;

[0028] 3. Connecting rod; 301. Initial positioning plate for lateral malleolus; 302. Sleeve; 303. Threaded hole; 304. Adjusting screw; 305. Mounting hole;

[0029] 4. Lateral ankle bone. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example

[0035] The lateral ankle transbone suturing auxiliary tool provided in this embodiment is as follows: Figure 1-Figure 4As shown, it includes: an angle adjustment component, a lateral malleolus bone drilling auxiliary component and a lateral malleolus tip initial positioning component.

[0036] The angle adjustment assembly includes an arc-shaped sleeve 1 and an arc-shaped inner rod 101. The arc-shaped sleeve 1 is provided with a locking member for locking the arc-shaped inner rod 101. One end of the arc-shaped inner rod 101 is movably inserted into one end of the arc-shaped sleeve 1.

[0037] The lateral malleolus drilling auxiliary assembly includes a first circular sleeve 2, a second circular sleeve 201, a first cylindrical hollow cylinder 202 and a second cylindrical hollow cylinder 204. The first circular sleeve 2 is fixedly mounted on the other end of the arc sleeve 1, and the second circular sleeve 201 is mounted on the other end of the arc inner rod 101 through a connecting piece. The first cylindrical hollow cylinder 202 penetrates the first circular sleeve 2, and the first cylindrical hollow cylinder 202 is threadedly connected to the first circular sleeve 2. The second cylindrical hollow cylinder 204 penetrates the second circular sleeve 201, and the second cylindrical hollow cylinder 204 is threadedly connected to the second circular sleeve 201.

[0038] Among them, the lateral malleolus initial positioning component includes a connecting rod 3 and a lateral malleolus initial positioning plate 301. The connecting rod 3 is fixedly installed at the junction of the second circular sleeve 201 and the connecting piece, and the connecting rod 3 is located below the arc-shaped inner rod 101 and is inclined toward one side of the arc-shaped sleeve 1. The lateral malleolus initial positioning plate 301 can be adjusted and sleeved on the connecting rod 3.

[0039] The lateral malleolus transbone suturing auxiliary tool using the above technical solution is composed of an angle adjustment component, a lateral malleolus bone drilling auxiliary component and a lateral malleolus tip initial positioning component. The angle adjustment component is mainly composed of an arc sleeve 1 and an arc inner rod 101. The lateral malleolus bone drilling auxiliary component is mainly composed of a first round sleeve 2, a second round sleeve 201, a first cylindrical hollow tube 202 and a second cylindrical hollow tube 204. The lateral malleolus tip initial positioning component is mainly composed of a connecting rod 3 and a lateral malleolus tip initial positioning plate 301. When in use, the angle between the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 is adjusted by adjusting the position of one end of the arc inner rod 101 inside the arc sleeve 1, and then the lateral malleolus tip initial positioning plate 301 is adjusted on the connecting rod 3. The position of the lateral malleolus initial positioning plate 301 allows the distal end of the lateral malleolus initial positioning plate 301 to be placed at the initial position of the lateral malleolus of the lateral malleolus 4, and then the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 are rotated respectively, so that the distal ends of the first cylindrical hollow tube 202 and the distal ends of the second cylindrical hollow tube 204 are against the side of the lateral malleolus 4, and then the drill bit of the drilling tool can be passed through the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 to drill holes in the lateral malleolus 4, and the two angled holes drilled are connected to each other, so that an angled bone channel of the lateral malleolus can be produced, and the ligament tissue at the lateral malleolus position can be sutured through the bone channel, which can greatly improve work efficiency. More importantly, it can effectively avoid the need for re-drilling to cause additional greater harm to the patient.

[0040] Specifically, in this embodiment, the locking member is arranged near the end of the arc sleeve 1 away from the first round sleeve 2, and the locking member includes a threaded sleeve 103 and a locking screw 102. The threaded sleeve 103 is fixedly installed on the side wall of the arc sleeve 1, and the screw of the locking screw 102 is threaded on the threaded sleeve 103, and the distal end of the screw of the locking screw 102 is tightly pressed against the surface of the arc inner rod 101. The locking screw 102 is used to lock the position of the arc inner rod 101 in the arc sleeve 1.

[0041] Specifically, in this embodiment, the arc-shaped inner rod 101 and the arc-shaped sleeve 1 cannot rotate relative to each other after being assembled. This arrangement can prevent the arc-shaped inner rod 101 and the arc-shaped sleeve 1 from rotating relative to each other after being assembled, thereby preventing the accuracy of the angle between the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 from being affected.

[0042] Specifically, in this embodiment, the connecting member includes a connecting seat 205 and a fixing screw 206. The connecting seat 205 is fixedly installed on the outer surface of the second circular sleeve 201. The end of the arc-shaped inner rod 101 located outside the arc-shaped sleeve 1 is inserted into the interior of the connecting seat 205. The screw of the fixing screw 206 is screwed on the connecting seat 205, and the distal end of the screw of the fixing screw 206 is tightly pressed against the surface of the arc-shaped inner rod 101. The connecting seat 205 and the fixing screw 206 cooperate with each other to facilitate the assembly between the arc-shaped inner rod 101 and the second circular sleeve 201.

[0043] Specifically, in the present embodiment, in order to facilitate the adjustment of the position of the lateral malleolus initial positioning plate 301 on the connecting rod 3 to meet the use requirements of different patients, a plurality of side-by-side mounting holes 305 are provided on the lateral malleolus initial positioning plate 301, and a plurality of side-by-side sleeves 302 are fixedly installed on the lateral malleolus initial positioning plate 301, and the sleeves 302 are arranged in a one-to-one correspondence with the mounting holes 305, and a threaded hole 303 is provided on the side wall of the sleeve 302, and an adjusting screw 304 is threadedly connected in the threaded hole 303, and the connecting rod 3 is passed through one of the mounting holes 305 and a sleeve 302 at a corresponding position, and the distal end of the screw of the adjusting screw 304 is pressed against the surface of the connecting rod 3, and the arranged adjusting screw 304, sleeve 302 and mounting hole 305 cooperate with each other to facilitate the adjustment of the position of the lateral malleolus initial positioning plate 301 on the connecting rod 3.

[0044] Specifically, in this embodiment, in order to facilitate the operation of rotating the first cylindrical hollow cylinder 202, a first cylindrical handle 203 is fixedly installed at one end of the first cylindrical hollow cylinder 202. In order to prevent the first cylindrical handle 203 from affecting the use of the first cylindrical hollow cylinder 202, the first cylindrical handle 203 is coaxial with the first cylindrical hollow cylinder 202 and connected.

[0045] Specifically, in this embodiment, in order to facilitate the adjustment of the position of the first cylindrical hollow cylinder 202 on the first sleeve 2, a first external thread is provided on the outer surface of the first cylindrical hollow cylinder 202, and a first internal thread matching the first external thread is provided on the inner surface of the first sleeve 2.

[0046] Specifically, in this embodiment, in order to facilitate the operation of rotating the second cylindrical hollow cylinder 204, a second cylindrical handle 207 is fixedly installed at one end of the second cylindrical hollow cylinder 204. In order to prevent the second cylindrical handle 207 from affecting the use of the second cylindrical hollow cylinder 204, the second cylindrical handle 207 is coaxial with the second cylindrical hollow cylinder 204 and connected.

[0047] Specifically, in this embodiment, in order to facilitate the adjustment of the position of the second cylindrical hollow tube 204 on the second sleeve 201, a second external thread is provided on the outer surface of the second cylindrical hollow tube 204, and a second internal thread matching the second external thread is provided on the inner surface of the second sleeve 201.

[0048] In summary, the lateral ankle transbone suture auxiliary tool provided in this embodiment is referred to Figure 4 When in use, the angle between the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 is adjusted by adjusting the position of one end of the arc-shaped inner rod 101 inside the arc-shaped sleeve 1. After the adjustment is completed, the locking screw 102 is tightened, and then the position of the lateral malleolus initial positioning plate 301 on the connecting rod 3 is adjusted so that the distal end of the lateral malleolus initial positioning plate 301 can be placed at the initial position of the lateral malleolus of the lateral malleolus 4. After the adjustment is completed, the adjusting screw 304 is tightened, and then the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 are rotated respectively. The distal ends of the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 are placed against the sides of the lateral malleolus 4, and then the drill bit of the drilling tool can be passed through the first cylindrical hollow tube 202 and the second cylindrical hollow tube 204 to drill holes in the lateral malleolus 4. The two angled holes drilled are interconnected to create an angled bone channel of the lateral malleolus, and the ligament tissue at the lateral malleolus can be sutured through the bone channel, which can greatly improve work efficiency. More importantly, it can effectively avoid the need for re-drilling to cause additional greater harm to the patient.

[0049] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A lateral ankle bone transosseous suturing auxiliary tool, characterized in that: include: An angle adjustment component, the angle adjustment component comprising an arc-shaped sleeve (1) and an arc-shaped inner rod (101), the arc-shaped sleeve (1) being provided with a locking piece for locking the arc-shaped inner rod (101), one end of the arc-shaped inner rod (101) being movably inserted into one end of the arc-shaped sleeve (1); A lateral malleolus drilling auxiliary component, the lateral malleolus drilling auxiliary component comprising a first round sleeve (2), a second round sleeve (201), a first cylindrical hollow cylinder (202) and a second cylindrical hollow cylinder (204), the first round sleeve (2) being fixedly mounted on the other end of the arc-shaped sleeve (1), the second round sleeve (201) being mounted on the other end of the arc-shaped inner rod (101) through a connecting piece, the first cylindrical hollow cylinder (202) passing through the first round sleeve (2), and the first cylindrical hollow cylinder (202) being threadedly connected to the first round sleeve (2), the second cylindrical hollow cylinder (204) passing through the second round sleeve (201), and the second cylindrical hollow cylinder (204) being threadedly connected to the second round sleeve (201); A lateral malleolus initial positioning component, the lateral malleolus initial positioning component comprising a connecting rod (3) and a lateral malleolus initial positioning plate (301), the connecting rod (3) being fixedly mounted at the junction of the second circular sleeve (201) and the connecting piece, and the connecting rod (3) being located below the arc-shaped inner rod (101) and being inclined toward one side of the arc-shaped sleeve (1), and the lateral malleolus initial positioning plate (301) being adjustable and sleeved on the connecting rod (3).

2. The lateral malleolus transosseous suturing auxiliary tool according to claim 1, characterized in that: The locking member is arranged near one end of the arc-shaped sleeve (1) away from the first circular sleeve (2), and the locking member comprises a threaded sleeve (103) and a locking screw (102), the threaded sleeve (103) is fixedly mounted on the side wall of the arc-shaped sleeve (1), the screw of the locking screw (102) is screwed on the threaded sleeve (103), and the distal end of the screw of the locking screw (102) is tightly pressed against the surface of the arc-shaped inner rod (101).

3. The lateral malleolus transosseous suturing auxiliary tool according to claim 2, characterized in that: The arc-shaped inner rod (101) and the arc-shaped sleeve (1) cannot rotate relative to each other after being assembled.

4. The lateral malleolus transosseous suturing auxiliary tool according to claim 3, characterized in that: The connecting member comprises a connecting seat (205) and a fixing screw (206); the connecting seat (205) is fixedly mounted on the outer surface of the second circular sleeve (201); one end of the arc-shaped inner rod (101) located outside the arc-shaped sleeve (1) is inserted into the interior of the connecting seat (205); the screw of the fixing screw (206) is screwed onto the connecting seat (205), and the distal end of the screw of the fixing screw (206) is tightly pressed against the surface of the arc-shaped inner rod (101).

5. The lateral malleolus transosseous suturing auxiliary tool according to claim 1, characterized in that: The lateral malleolus initial positioning plate (301) is provided with a plurality of mounting holes (305) arranged in parallel, and the lateral malleolus initial positioning plate (301) is fixedly provided with a plurality of sleeves (302) arranged in parallel, the sleeves (302) are arranged in one-to-one correspondence with the mounting holes (305), and a threaded hole (303) is provided on the side wall of the sleeve (302), an adjusting screw (304) is screwed into the threaded hole (303), the connecting rod (3) passes through one of the mounting holes (305) and a sleeve (302) at a corresponding position, and the distal end of the screw of the adjusting screw (304) is tightly pressed against the surface of the connecting rod (3).

6. The lateral malleolus transosseous suturing auxiliary tool according to claim 1, characterized in that: A first cylindrical handle (203) is fixedly mounted on one end of the first cylindrical hollow tube (202), and the first cylindrical handle (203) is coaxial with and connected to the first cylindrical hollow tube (202).

7. The lateral malleolus transosseous suturing auxiliary tool according to claim 6, characterized in that: The outer surface of the first cylindrical hollow tube (202) is provided with a first external thread, and the inner surface of the first circular sleeve (2) is provided with a first internal thread matching the first external thread.

8. The lateral malleolus transosseous suturing auxiliary tool according to claim 1, characterized in that: A second cylindrical handle (207) is fixedly mounted on one end of the second cylindrical hollow tube (204), and the second cylindrical handle (207) is coaxial with and connected to the second cylindrical hollow tube (204).

9. The lateral malleolus transosseous suturing auxiliary tool according to any one of claims 1 to 8, characterized in that: The outer surface of the second cylindrical hollow cylinder (204) is provided with a second external thread, and the inner surface of the second sleeve (201) is provided with a second internal thread matching the second external thread.

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