A positioning auxiliary forceps and a reduction set for fracture surgery

Abstract

The present invention provides a positioning auxiliary forceps, which relates to the technical field of medical devices. The positioning auxiliary forceps include a first forceps arm, a second forceps arm, a positioning mechanism and a guiding mechanism; the first forceps arm and the second forceps arm are hinged to each other, and the first forceps arm and the second forceps arm are respectively connected to the positioning mechanism; the guiding mechanism is arranged on the positioning mechanism; during the swinging process of the second forceps arm relative to the first forceps arm, the drill bit can always point to the midpoint position between the first forceps arm and the second forceps arm through the guiding mechanism. The positioning auxiliary forceps of the present invention use the positioning mechanism to limit the spatial position of the guiding mechanism, so that the drill bit passing through the guiding mechanism can be accurately positioned at the midpoint position between the first forceps arm and the second forceps arm, thereby ensuring the installation accuracy of the anatomical shape plate. On this basis, the present invention also provides a reduction kit for fracture surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a positioning auxiliary forceps and a reduction suit for fracture surgery. Background Art

[0002] During fracture reduction surgery, anatomical plates are usually used to fix the distal and proximal ends of the broken bone, respectively, so that the bone can be accurately reduced and fixed.

[0003] The specific operation process of the operation is: first use screws to fix the head end of the anatomical plate to the distal end of the bone, and then use screws to fix the tail end of the anatomical plate to the proximal end of the bone, so that the bone can be restored and fixed in its original position.

[0004] The main tool for fracture reduction surgery in clinical practice is reduction forceps, but reduction forceps can only clamp and fix the proximal end of the bone. When the anatomical plate swings around its own head end on the bone, it is difficult to detect with the naked eye. At this time, after the tail end of the anatomical plate is fixed to the proximal end of the bone, the distal and proximal ends of the bone will be offset and cannot be restored to their original positions before the fracture. Summary of the invention

[0005] The purpose of the present invention is to provide a positioning auxiliary forceps and a reduction kit for fracture surgery, which helps to assist in observing and keeping the anatomical plate from swinging and displacing when clamping the proximal end of the bone, thereby ensuring that the distal and proximal ends of the bone can be fixed and restored to their original positions after fracture.

[0006] The present invention is achieved in that:

[0007] A positioning auxiliary pliers, comprising a first pliers arm, a second pliers arm, a positioning mechanism and a guide mechanism; the first pliers arm and the second pliers arm are hinged to each other, and the first pliers arm and the second pliers arm are respectively connected to the positioning mechanism; the guide mechanism is arranged on the positioning mechanism; during the swinging process of the second pliers arm relative to the first pliers arm, the drill bit can always point to the midpoint position between the first pliers arm and the second pliers arm through the guide mechanism.

[0008] When the positioning auxiliary forceps are used, the head end of the anatomical plate is first fixed to the distal end of the bone, and then the tail end of the anatomical plate is extended to a suitable position on the proximal end of the bone. At this time, the proximal end of the bone is clamped by the first clamp arm and the second clamp arm, and then the position and angle of the guide mechanism are determined by the positioning mechanism, so that the drill bit accurately points to the midpoint between the first clamp arm and the second clamp arm after passing through the guide mechanism. That is, the position of the tail end of the anatomical plate on the proximal end of the bone can be accurately located, and even if the anatomical plate is slightly displaced, it can be clearly found and quickly repositioned and corrected.

[0009] Furthermore, the positioning mechanism includes a first sling and a second sling; the two ends of the first sling are respectively hinged to the first clamp arm and the outer wall of the guide mechanism, and the two ends of the second sling are respectively hinged to the second clamp arm and the outer wall of the guide mechanism; the length of the first sling is equal to the length of the second sling. The technical effect is that the first sling and the second sling of equal length can ensure that the guide mechanism is located in the symmetry plane of the first clamp arm and the second clamp arm after the first sling and the second sling are respectively straightened.

[0010] Optionally, the first sling and the second sling may also be rigid straight rods, which are respectively hinged to the clamp arm and the guide mechanism.

[0011] Furthermore, the first sling is detachably connected to the first clamp arm, and the second sling is detachably connected to the second clamp arm. The technical effect is that slings of different lengths can be selected for different bones and different locking nail sleeves (used to guide the drill bit). For example, the length of the sling used for the large locking nail sleeve is 10 cm, the length of the sling used for the medium locking nail sleeve is 6 cm, and the length of the sling used for the small locking nail sleeve is 5 to 8 cm. Optionally, the first sling can be detachably installed by being clamped in the mounting hole of the first clamp arm through an elastic hook, and the second sling can also be detachably installed by being clamped in the mounting hole of the second clamp arm through an elastic hook.

[0012] Furthermore, the first sling is detachably connected to the guide mechanism, and the second sling is detachably connected to the guide mechanism. The technical effect is that guide mechanisms with different calibers can be selected for different bones and different locking screw sleeves. For example, the caliber of the guide mechanism used for the large locking screw sleeve is 4.8 mm, the caliber of the guide mechanism used for the medium locking screw sleeve is 2.8 mm, and the caliber of the guide mechanism used for the small locking screw sleeve is 1.8 mm to 2.0 mm. Optionally, the first sling can be plugged into the slot of the guide mechanism through an anchor structure with a large end size, and the second sling can also be plugged into the slot of the guide mechanism through an anchor structure with a large end size.

[0013] Furthermore, the first clamp arm is provided with a first hook tooth, and the second clamp arm is provided with a second hook tooth; the extension direction of the first hook tooth is opposite to the extension direction of the first sling, and the extension direction of the second hook tooth is opposite to the extension direction of the second sling. Its technical effect is that the hook tooth structure can change the contact surface between the clamping section and the bone from a complete plane or curved surface to multiple point-to-point contacts, which can further enhance the clamping and fixing effect of the clamping section on the bone.

[0014] Furthermore, the first hook tooth and the second hook tooth are both arc-shaped, the free end of the first hook tooth is bent toward the second hook tooth, and the free end of the second hook tooth is bent toward the first hook tooth. The technical effect is that the arc-shaped first hook tooth and the second hook tooth can wrap and clamp the bone according to the shape of the bone, preventing the proximal end of the bone from rolling after the fracture.

[0015] Optionally, the first hook tooth and the second hook tooth are both provided with a plurality of racks, and the plurality of racks on the first hook tooth and the plurality of racks on the second hook tooth are arranged in an interlaced manner. When clamping a larger bone, it is not affected, and when clamping a smaller bone, the racks can also be staggered for clamping, thereby improving the adaptability of the two hook teeth to different bones.

[0016] Furthermore, the first hook tooth is located at the free end of the first clamp arm, and the second hook tooth is located at the free end of the second clamp arm; the distance between the first hook tooth and the second hook tooth is smaller than the maximum distance between the first clamp section and the second clamp section. The technical effect is that since the first hook tooth and the second hook tooth are located at the front end, and the distance between the two is smaller than the distance between the first clamp arm and the second clamp arm at the rear end, the first clamp arm and the second clamp arm are preferably set to an elliptical structure with an open middle, which does not block the surgical incision and is convenient for the surgeon to observe.

[0017] Furthermore, a locking mechanism is also provided; the first clamp arm includes a first clamp section and a first clamp handle that are fixedly connected, and the second clamp arm includes a second clamp section and a second clamp handle that are fixedly connected; the first clamp arm is hinged to the second clamp arm through the connection position between the first clamp section and the first clamp handle, and the second clamp arm is hinged to the first clamp arm through the connection position between the second clamp section and the second clamp handle; the locking mechanism is provided on the first clamp handle and the second clamp handle, and is used to limit the first clamp arm from swinging relative to the second clamp arm around the rotation axis. Its technical effect is that after the locking mechanism limits the swing of the first clamp arm relative to the second clamp arm, the surgeon can operate with only one hand, freeing up the other hand, thereby improving the surgical efficiency.

[0018] Furthermore, the locking mechanism includes a first locking bar and a second locking bar; the first locking bar is arranged on the first clamping section, and the second locking bar is arranged on the second clamping section; when the first clamp arm swings relative to the second clamp arm, the first locking bar can be attached to and move relative to the second locking bar; the first locking bar and the second locking bar are provided with a plurality of corresponding latching teeth, and the first locking bar and the second locking bar are engaged with each other through the latching teeth. The technical effect is that the first locking bar and the second locking bar are engaged and locked by the corresponding latching teeth, and the locking function is ensured without affecting the swing of the first clamp arm relative to the second clamp arm.

[0019] A reduction kit for fracture surgery comprises a locking nail sleeve and the above-mentioned positioning auxiliary pliers, wherein the locking nail sleeve is arranged between the first pliers arm, the second pliers arm and the guide mechanism, and when the drill bit passes through the guide mechanism, it can penetrate the locking nail sleeve.

[0020] The beneficial effects of the present invention are:

[0021] The positioning auxiliary forceps and the reduction kit for fracture surgery of the present invention utilize a positioning mechanism to determine the position of a guide mechanism, so that a drill bit passing through the guide mechanism can accurately point to the midpoint between the first forceps arm and the second forceps arm, thereby ensuring the installation accuracy of the anatomical shape plate and avoiding deviation of the distal and proximal ends of the bone. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A front view of a positioning auxiliary pliers provided in a first embodiment of the present invention;

[0024] Figure 2 A bottom view of the positioning auxiliary pliers provided by the first embodiment of the present invention;

[0025] Figure 3 A front view of a positioning auxiliary pliers provided in a second embodiment of the present invention;

[0026] Figure 4 A bottom view of the positioning auxiliary pliers provided by the second embodiment of the present invention;

[0027] Figure 5 A bottom view of a first clamp arm of a positioning auxiliary clamp provided in a second embodiment of the present invention;

[0028] Figure 6 A front view of a positioning auxiliary pliers provided in a third embodiment of the present invention;

[0029] Figure 7 A bottom view of the positioning auxiliary pliers provided in the third embodiment of the present invention;

[0030] Figure 8 A schematic structural diagram of a fracture surgery reduction kit provided by a fourth embodiment of the present invention;

[0031] Fig. 9 This is a schematic diagram of the surgical operation of a reduction kit for fracture surgery provided in the fourth embodiment of the present invention.

[0032] In the figure: 100-first clamp arm; 110-first clamping section; 111-first hook tooth; 120-first clamp handle; 200-second clamp arm; 210-second clamping section; 211-second hook tooth; 220-second clamp handle; 300-first sling; 400-second sling; 500-guide mechanism; 700-rack; 800-locking mechanism; 801-first locking strip; 802-second locking strip; 803-grip tooth. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and marked in the drawings can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] First embodiment:

[0041] Figure 1 A front view of the positioning auxiliary pliers provided by the first embodiment of the present invention; Figure 2 This is a bottom view of the positioning auxiliary pliers provided by the first embodiment of the present invention. Figure 1 , Figure 2 The present embodiment provides a positioning auxiliary pliers, which includes a first pliers arm 100, a second pliers arm 200, a positioning mechanism and a guide mechanism 500; the first pliers arm 100 and the second pliers arm 200 are hinged to each other, and the first pliers arm 100 and the second pliers arm 200 are respectively connected to the positioning mechanism; the guide mechanism 500 is arranged on the positioning mechanism; during the swinging process of the second pliers arm 200 relative to the first pliers arm 100, the drill bit can always point to the midpoint position between the first pliers arm 100 and the second pliers arm 200 by passing through the guide mechanism 500.

[0042] Furthermore, if Figure 1 , Figure 2 As shown, the positioning mechanism includes a first sling 300 and a second sling 400; the two ends of the first sling 300 are respectively hinged to the first clamp arm 100 and the outer wall of the guide mechanism 500, and the two ends of the second sling 400 are respectively hinged to the second clamp arm 200 and the outer wall of the guide mechanism 500; the length of the first sling 300 is equal to the length of the second sling 400.

[0043] The working principle and operation method of the above positioning auxiliary pliers are as follows:

[0044] When the positioning auxiliary forceps are used, the head end of the anatomical plate C is first fixed to the distal end of the bone B, and then the tail end of the anatomical plate C is extended to a suitable position on the proximal end of the bone B. At this time, the proximal end of the bone B is clamped by the first clamp arm 100 and the second clamp arm 200. Then, the first sling 300 and the second sling 400 are pulled up. Since the length of the first sling 300 and the length of the second sling 400 are equal, the position and angle of the guide mechanism 500 can be determined, so that the drill bit can accurately point to the midpoint between the first clamp arm 100 and the second clamp arm 200 after passing through the guide mechanism 500. Even if the anatomical plate C is slightly displaced, it can be clearly found and quickly repositioned and corrected.

[0045] Optionally, the first sling 300 and the second sling 400 may also be rigid straight rods, which are respectively hinged to the clamp arm and the guide mechanism 500 .

[0046] The first sling 300 is detachably connected to the first clamp arm 100, and the second sling 400 is detachably connected to the second clamp arm 200. Preferably, the first sling 300 can be detachably installed by being connected to the mounting hole of the first clamp arm 100 through an elastic hook, and the second sling 400 can also be detachably installed by being connected to the mounting hole of the second clamp arm 200 through an elastic hook. For different bones B and different locking nail sleeves A (used to guide the drill bit), slings of different lengths can be selected. For example, the sling length used by the large locking nail sleeve A is 10 cm, the sling length used by the medium locking nail sleeve A is 6 cm, and the sling length used by the small locking nail sleeve A is 5 to 8 cm.

[0047] The first sling 300 is detachably connected to the guide mechanism 500, and the second sling 400 is detachably connected to the guide mechanism 500. Preferably, the first sling 300 can be plugged into the slot of the guide mechanism 500 through an anchor structure with a large end size, and the second sling 400 can also be plugged into the slot of the guide mechanism 500 through an anchor structure with a large end size. Guide mechanisms 500 with different calibers can be selected for different bones B and different locking screw sleeves A. For example, the caliber of the guide mechanism 500 used in the large locking screw sleeve A is 4.8 mm, the caliber of the guide mechanism 500 used in the medium locking screw sleeve A is 2.8 mm, and the caliber of the guide mechanism 500 used in the small locking screw sleeve A is 1.8 mm to 2.0 mm.

[0048] Second embodiment:

[0049] Figure 3 A front view of a positioning auxiliary pliers provided in a second embodiment of the present invention; Figure 4 A bottom view of the positioning auxiliary pliers provided by the second embodiment of the present invention; Figure 5This is a bottom view of the first clamp arm 100 of the positioning auxiliary clamp provided in the second embodiment of the present invention. Figure 3 , Figure 4 , Figure 5 The present embodiment provides a positioning auxiliary pliers, which is substantially the same as the positioning auxiliary pliers of the first embodiment. The difference between the two is that in the positioning auxiliary pliers of the present embodiment, a first hook tooth 111 is provided on the first clamp arm 100, and a second hook tooth 211 is provided on the second clamp arm 200; an extension direction of the first hook tooth 111 is opposite to an extension direction of the first sling 300, and an extension direction of the second hook tooth 211 is opposite to an extension direction of the second sling 400.

[0050] Furthermore, both the first hook tooth 111 and the second hook tooth 211 are arc-shaped, the free end of the first hook tooth 111 is bent toward the second hook tooth 211 , and the free end of the second hook tooth 211 is bent toward the first hook tooth 111 .

[0051] Furthermore, the first hook tooth 111 and the second hook tooth 211 each include a plurality of racks 700 , and the plurality of racks 700 on the first hook tooth 111 and the plurality of racks 700 on the second hook tooth 211 are arranged alternately.

[0052] Furthermore, if Figure 4 , Figure 5 As shown, the first hook tooth 111 is located at one end of the first clamping section 110 away from the rotation axis, and the second hook tooth 211 is located at one end of the second clamping section 210 away from the rotation axis; the distance between the first hook tooth 111 and the second hook tooth 211 is smaller than the maximum distance between the first clamping section 110 and the second clamping section 210.

[0053] Third embodiment:

[0054] Figure 6 A front view of a positioning auxiliary pliers provided in a third embodiment of the present invention; Figure 7 This is a bottom view of the positioning auxiliary pliers provided by the third embodiment of the present invention. Figure 6 , Figure 7 The present embodiment provides a positioning auxiliary pliers, which is substantially the same as the positioning auxiliary pliers of the first embodiment or the second embodiment, and the difference between the two is that the positioning auxiliary pliers of the present embodiment is further provided with a locking mechanism 800; wherein the first clamp arm 100 includes a first clamping section 110 and a first clamping handle 120 which are fixedly connected, and the second clamp arm 200 includes a second clamping section 210 and a second clamping handle 220 which are fixedly connected; the first clamp arm 100 is hinged to the second clamp arm 200 through the connection position between the first clamping section 110 and the first clamping handle 120, and the second clamp arm 200 is hinged to the first clamp arm 100 through the connection position between the second clamping section 210 and the second clamping handle 220. The locking mechanism 800 is provided on the first clamping handle 120 and the second clamping handle 220, and is used to limit the first clamp arm 100 from swinging around the rotation axis relative to the second clamp arm 200.

[0055] Among them, the locking mechanism 800 includes a first locking strip 801 and a second locking strip 802; the first locking strip 801 is arranged on the first clamping section 110, and the second locking strip 802 is arranged on the second clamping section 210; when the first clamp arm 100 swings relative to the second clamp arm 200, the first locking strip 801 can be attached to and move relative to the second locking strip 802; the first locking strip 801 and the second locking strip 802 are provided with corresponding multiple latching teeth 803, and the first locking strip 801 and the second locking strip 802 are engaged with each other through the latching teeth 803.

[0056] Fourth embodiment:

[0057] Figure 8 A schematic structural diagram of a fracture surgery reduction kit provided by a fourth embodiment of the present invention; Fig. 9 This is a schematic diagram of the operation of the fracture reduction kit provided by the fourth embodiment of the present invention. Figure 8 , Fig. 9 This embodiment provides a reduction kit for fracture surgery, which includes a locking sleeve A and a positioning auxiliary pliers of any of the above embodiments. The locking sleeve A is arranged between the first sling 300, the second sling 400 and the guide mechanism 500. When the drill bit passes through the guide mechanism 500, it can penetrate the locking sleeve A.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning auxiliary pliers, characterized in that: It comprises a first clamp arm (100), a second clamp arm (200), a positioning mechanism and a guiding mechanism (500); The first clamp arm (100) and the second clamp arm (200) are hinged to each other, and the first clamp arm (100) and the second clamp arm (200) are respectively connected to the positioning mechanism; the guide mechanism (500) is arranged on the positioning mechanism; during the swinging process of the second clamp arm (200) relative to the first clamp arm (100), the drill bit can always point to the midpoint between the first clamp arm (100) and the second clamp arm (200) by passing through the guide mechanism (500); The positioning mechanism comprises a first sling (300) and a second sling (400); two ends of the first sling (300) are respectively hinged to the first clamp arm (100) and the outer wall of the guide mechanism (500), and two ends of the second sling (400) are respectively hinged to the second clamp arm (200) and the outer wall of the guide mechanism (500); the length of the first sling (300) is equal to the length of the second sling (400); The first sling (300) is detachably connected to the first clamp arm (100), and the second sling (400) is detachably connected to the second clamp arm (200); The first sling (300) is detachably connected to the guide mechanism (500), and the second sling (400) is detachably connected to the guide mechanism (500).

2. The positioning auxiliary pliers according to claim 1, characterized in that: The first clamp arm (100) is provided with a first hook tooth (111), and the second clamp arm (200) is provided with a second hook tooth (211); The extending direction of the first hook tooth (111) is opposite to the extending direction of the first sling (300), and the extending direction of the second hook tooth (211) is opposite to the extending direction of the second sling (400).

3. The positioning auxiliary pliers according to claim 2, characterized in that: The first hook tooth (111) and the second hook tooth (211) are both arc-shaped; the free end of the first hook tooth (111) is bent toward the second hook tooth (211), and the free end of the second hook tooth (211) is bent toward the first hook tooth (111).

4. The positioning auxiliary pliers according to claim 2, characterized in that: The first hook tooth (111) is located at the free end of the first clamp arm (100), and the second hook tooth (211) is located at the free end of the second clamp arm (200); The distance between the first hook tooth (111) and the second hook tooth (211) is smaller than the maximum distance between the first clamp arm (100) and the second clamp arm (200).

5. The positioning auxiliary pliers according to any one of claims 2 to 4, characterized in that: A locking mechanism (800) is also provided; The first clamp arm (100) comprises a first clamp section (110) and a first clamp handle (120) which are fixedly connected, and the second clamp arm (200) comprises a second clamp section (210) and a second clamp handle (220) which are fixedly connected; the first clamp arm (100) is hinged to the second clamp arm (200) via a connection position between the first clamp section (110) and the first clamp handle (120), and the second clamp arm (200) is hinged to the first clamp arm (100) via a connection position between the second clamp section (210) and the second clamp handle (220); The locking mechanism (800) is arranged on the first clamp handle (120) and the second clamp handle (220) and is used to limit the first clamp arm (100) from swinging relative to the second clamp arm (200).

6. The positioning auxiliary pliers according to claim 5, characterized in that: The locking mechanism (800) comprises a first locking strip (801) and a second locking strip (802); The first locking strip (801) is arranged on the first clamping section (110), and the second locking strip (802) is arranged on the second clamping section (210); When the first clamp arm (100) swings relative to the second clamp arm (200), the first locking strip (801) can be attached to and move relative to the second locking strip (802); The first locking strip (801) and the second locking strip (802) are provided with a corresponding plurality of latching teeth (803), and the first locking strip (801) and the second locking strip (802) are engaged with each other via the latching teeth (803).

7. A fracture reduction kit, characterized in that: It comprises a locking nail sleeve and a positioning auxiliary pliers according to any one of claims 1 to 6, wherein the locking nail sleeve is arranged between the first pliers arm (100), the second pliers arm (200) and the guide mechanism (500), and when the drill bit passes through the guide mechanism (500), it can penetrate the locking nail sleeve.

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