A traction bracket for a k-wire

Abstract

The application discloses a traction support for traction Kirschner wire, and relates to the technical field of medical devices, and has the technical features that the support comprises a plurality of Kirschner wire distraction forceps, each distraction forceps is formed by connecting a first forceps arm and a second forceps arm through a hinge shaft, the top end of the forceps arm is provided with a double-diameter compatible needle channel and a Kirschner wire fixing knob, and the lower half is provided with a distraction and pressure adjustment assembly. In addition, the support further comprises a clamp for connecting the two distraction forceps. The upper half of the forceps arm is in a small C shape in a closed state and is in a large C shape in a distraction state, and the design of the C shape is used to obtain a larger exposed and visible range in the middle of the distraction forceps. The application realizes multi-plane operation through the clamp, and the distraction and pressure adjustment assembly guarantees the flexibility and accuracy of operation. Compared with traditional devices, the traction support has the advantages of high stability, adaptability to Kirschner wires with different diameters, better exposure and visibility conditions in a distraction range, hard distraction and pressure and soft and hard distraction and pressure, and meets the needs of complex operations.

Description

A traction bracket for traction Kirschner wires Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a traction bracket for traction Kirschner wires. Background Technology

[0002] In the field of medical device technology, the fixation and manipulation effectiveness of traction Kirschner wires plays a crucial role in the success rate of surgeries such as fracture treatment and the quality of patient rehabilitation. In clinical applications, doctors need to use reliable traction frames to achieve precise positioning, stable fixation, and flexible manipulation of the Kirschner wires to ensure accurate reduction and effective fixation of the fracture site, promoting bone healing. However, traditional traction Kirschner wire fixation devices have revealed many limitations in practical applications, making it difficult to meet the complex and ever-changing surgical needs, and urgently requiring innovation and improvement.

[0003] Currently, common traction Kirschner wire fixation devices suffer from three main problems: First, insufficient fixation stability. Most devices struggle to hold the Kirschner wire securely, especially during patient limb movement or surgical traction, leading to displacement or loosening of the wire, affecting the stable fixation of the fracture ends, and potentially causing surgical failure or prolonged rehabilitation. Second, lack of operational flexibility. Existing devices are inconvenient to adjust in terms of opening angle and spreading force, making precise and convenient real-time adjustments impossible based on individual patient differences and surgical progress, limiting the surgeon's operational flexibility and failing to meet the needs of complex fracture reduction and fixation. Third, lack of multi-planar operational support. In some complex three-dimensional fracture reduction surgeries, multi-directional and multi-planar spreading and compression of the Kirschner wire is required, but traditional devices typically only achieve single-planar spreading or compression, failing to adapt to complex surgical scenarios and affecting surgical outcomes and patient rehabilitation quality. With the continuous advancement of medical technology, the shortcomings of existing traction Kirschner wire fixation devices are becoming increasingly apparent, making the development of a traction support that can stably fix, flexibly adjust, and support multi-planar operation an urgent clinical need. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a traction bracket for traction Kirschner wires, which addresses the issues of insufficient fixation stability, lack of operational flexibility, lack of multi-plane operation support, and insufficient exposure and transparency range within the opening range of the prior art.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A traction bracket for traction Kirschner wires includes a plurality of Kirschner wire opening clamps, each Kirschner wire opening clamp including a first clamp arm and a second clamp arm, the connection between the first clamp arm and the second clamp arm being rotatably connected to a hinge shaft to form a symmetrical, openable clamp-like structure; the top ends of the first clamp arm and the second clamp arm are provided with dual-diameter compatible needle channels, the dual-diameter compatible needle channels including parallel large-diameter Kirschner wire holes and small-diameter Kirschner wire holes, respectively adapted to Kirschner wires of different diameters; the top end of the clamp arm is provided with a Kirschner wire fixing knob, the Kirschner wire fixing knob having a threaded hole coaxial with the Kirschner wire hole, and the radial fixing of the Kirschner wire is achieved by rotating the Kirschner wire fixing knob;

[0006] The lower half of the first and second clamp arms is provided with a spreading and pressurizing adjustment assembly. The spreading and pressurizing adjustment assembly includes a screw that passes through the bottom of the clamp arm, a pressurizing knob that is threadedly connected to the screw, and a locking buckle for locking the position of the screw. The traction bracket also includes a clamp for connecting the two Kirschner wire spreading clamps. The clamp includes a symmetrically arranged fastener one and a fastener two, which are connected by a hinge and have a buckle fixing structure. The two Kirschner wire spreading clamps connect the dual-diameter compatible needle tracks at the top of their clamp arms to each other through the clamp to achieve multi-plane operation.

[0007] Furthermore, the dual-diameter compatible needle channel has two length specifications: 60cm and 20cm; the diameter of the large-diameter Kirschner wire hole is 2.5mm±0.1mm, and the diameter of the small-diameter Kirschner wire hole is 1.5mm±0.1mm; the edges of the Kirschner wire holes are all provided with a rounded corner structure of R0.2mm.

[0008] Furthermore, the Kirschner wire fixing knob is provided with a self-locking limiting groove to prevent the Kirschner wire from slipping out.

[0009] Furthermore, in the expansion and pressure adjustment assembly, one end of the screw is fixed to the hinge seat at the bottom of the second clamp arm, and the other end passes through the through hole at the bottom of the first clamp arm and is connected to the pressure knob; the locking buckle is an elastic metal sheet structure, located on the first clamp arm near the pressure knob, and its free end is provided with a barb.

[0010] Furthermore, the screw surface is provided with at least two limiting grooves with a depth of 0.5mm along the axial direction, and the barb of the locking buckle cooperates with the limiting grooves to prevent the screw from sliding.

[0011] Furthermore, the upper half of the first and second clamp arms is C-shaped, and several small holes with a length of 0.3cm are evenly distributed on the surface for threading sutures, assisting in fixation, and reducing the weight of the clamp arms.

[0012] Furthermore, the lower half of the first and second clamp arms is provided with a leaf spring, with the two ends of the spring abutting against the two clamp arms respectively, so that the Kirschner wire opens the clamps and automatically closes them when there is no external force.

[0013] Furthermore, the plurality of Kirschner wire spreading clamps, after being combined by a clamp, can be independently controlled to achieve one of the following operating modes:

[0014] 1. Spreading in two directions;

[0015] 2. Applying pressure in two directions;

[0016] 3. Rigidly stretched / compressed on both sides of the same plane;

[0017] 4. Apply soft and hard support / pressure to both sides of the same plane;

[0018] 5. Spread / pressurize in one direction, pressurize / spread in the other direction.

[0019] Furthermore, the clamp has a U-shaped bent structure for fastener one and an I-shaped structure with an inner protrusion for fastener two, with their opening directions opposite. The two openings of the clamp are respectively fitted onto the outer wall of the double-diameter compatible needle channel of the two Kirschner wire opening pliers, and their relative positions are locked by the snap-locking structure.

[0020] Furthermore, the lower half of the outer surface of the first and second clamp arms is provided with a non-slip gripping part with a mesh pattern or raised dot structure.

[0021] Compared with existing technologies, the beneficial effects of this solution are as follows: This invention overcomes the limitations of traditional traction Kirschner wire fixation devices in single-plane operation by using clamps, providing support for complex three-dimensional fracture reduction surgery. In actual operation, firstly, the dual-diameter compatible needle channel of one Kirschner wire retractor is inserted through one opening of the clamp and fixed, and then the dual-diameter compatible needle channel of the other Kirschner wire retractor is inserted through the other opening of the clamp. In this way, the two Kirschner wire retractors are interconnected. After connection, the surgeon can independently control the retraction and pressure adjustment components of each Kirschner wire retractor, achieving the following multi-plane operation modes:

[0022] Two-way dislocation: By adjusting the opening and closing angles of the two Kirschner wire dislocation forceps, dislocation operations in different directions can be achieved, which is suitable for multi-plane fracture reduction needs;

[0023] Compression in two directions: Compression is applied to the two Kirschner wire retractors to ensure stable fixation of multiple fracture ends;

[0024] Bilateral rigid distraction / compression in the same plane: Apply stable distraction or compression to the fracture sites on both sides in the same plane to ensure close fit and stable fixation of the fracture ends and promote bone healing;

[0025] Bilateral soft and hard stretching / compression on the same plane: Depending on the specific situation of the fracture site, one side is subjected to hard stretching / compression, while the other side is subjected to soft stretching / compression. This meets the personalized treatment needs of complex fractures, reduces damage to surrounding soft tissues, and improves surgical outcomes and patient recovery quality.

[0026] Combination of compression in one direction and dilation in one direction: In the same surgical setting, one Kirschner wire dilation forceps is responsible for compression and fixation, while another Kirschner wire dilation forceps is responsible for dilation and reduction, meeting the diverse needs of complex surgeries.

[0027] This invention, through its multi-planar operation mode, demonstrates that employing complex, multi-directional composite operations can fully adapt to the multi-dimensional structure of human bones and complex fracture morphologies, significantly improving surgical outcomes and patient rehabilitation quality. In treating complex intra-articular fractures involving multiple fracture fragments, surgeons can utilize this instrument to simultaneously and precisely reduce and fix fracture fragments at different planes, minimizing surgical trauma and risks, thus revolutionizing clinical practice.

[0028] This invention increases operational flexibility and precision by employing an adjustable pressure mechanism. One end of the screw of the adjustable pressure mechanism is fixed to a hinged base at the bottom of the second clamp arm, while the other end passes through a through-hole at the bottom of the first clamp arm and is threadedly connected to the pressure knob. By rotating the pressure knob, the screw can move axially, thereby precisely controlling the opening angle of the first and second clamp arms and adjusting the opening or pressure intensity. The locking buckle uses an elastic metal sheet structure with a barb at its free end, which engages with a 0.5mm deep limiting groove on the screw surface to ensure that the clamp arm position will not shift due to accidental slippage after adjustment to the target position, thus guaranteeing operational stability and reliability. Furthermore, leaf springs are embedded in the lower half of the first and second clamp arms, using the spring's elasticity to automatically close the Kirschner wire forceps when no external force is applied, simplifying the operation and improving surgical efficiency. The mesh or raised dot structure design of the anti-slip grip further enhances the stability of the surgeon's grip and reduces the risk of accidental slippage during surgical procedures. Overall, the design of this expansion and pressure adjustment component allows doctors to flexibly and precisely adjust the instrument status in real time according to individual patient differences and surgical progress, meeting the needs of complex fracture reduction and fixation, and demonstrating significant advantages in multi-dimensional surgical operations. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the Kirschner wire spreading forceps-clamp connection in an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of the three-dimensional structure of the Kirschner wire opening forceps in an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of the three-dimensional structure of the clamp in an embodiment of the present invention;

[0032] Figure 4 is a front view schematic diagram of the Kirschner wire spreading forceps in an embodiment of the present invention;

[0033] Figure 5 is a schematic cross-sectional view of the top of the clamp arm in an embodiment of the present invention.

[0034] In the diagram: 1. Kirschner wire opening clamps; 101. First clamp arm; 102. Second clamp arm; 103. Hinge shaft; 104. Dual-diameter compatible pin channel; 105. Kirschner wire hole; 1051. Large-diameter Kirschner wire hole; 1052. Small-diameter Kirschner wire hole; 106. Kirschner wire fixing knob; 107. Screw; 108. Pressure knob; 109. Locking buckle; 110. Leaf spring; 111. Self-locking limit groove; 112. Hinge seat; 113. Anti-slip grip; 2. Clamp; 201. Fastener 1; 202. Fastener 2; 203. Hinge; 204. Buckle fixing structure; 205. Opening. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be described in further detail below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the embodiments.

[0037] Example: As shown in Figures 1-5, a traction bracket for traction Kirschner wires includes two Kirschner wire opening clamps 1. The main body of the Kirschner wire opening clamp 1 is a symmetrical clamp-like structure, consisting of a first clamp arm 101 (left arm) and a second clamp arm 102 (right arm) rotatably connected by a hinge shaft 103, forming an openable and closable structure similar to "scissors". The hinge shaft 103 passes through a through hole in the middle of the two clamp arms, and the shaft body is fixed to the clamp arms by tight fit or welding. The upper part of the two clamp arms is small C-shaped in the closed state and large C-shaped in the open state. The C-shaped design provides a larger exposed and transparent area in the middle of the Kirschner wire opening clamp 1, and the surface is evenly distributed with 3-5 small holes of 0.3cm in length for threading sutures, assisting in fixation, and reducing the weight of the clamp arms.

[0038] The tip of the clamp arm (operating end) is the core area that directly contacts the Kirschner wire, and includes the following sub-components:

[0039] (1) Kirschner wire 105 (multi-diameter compatible design)

[0040] Both the first clamp arm 101 and the second clamp arm 102 have dual-diameter compatible needle channels 104 at their top jaws. These are elongated, continuous channels with two different lengths (60cm and 20cm) to accommodate different soft tissue gaps. They can simultaneously accommodate 1.5mm and 2.0mm Kirschner wires passing through in parallel, making them suitable for Kirschner wires of different sizes. The surface of the dual-diameter compatible needle channel 104 has circular Kirschner wire holes 105 with two different diameters:

[0041] Large diameter Kirschner wire hole 1051 (suitable for rigid Kirschner wires, such as 2.0mm in diameter): hole diameter 2.5mm±0.1mm, with rounded edges (R0.2mm) to avoid scratching the wire body;

[0042] Small diameter Kirschner wire hole 1052 (suitable for soft Kirschner wires, such as 1.5mm in diameter): hole diameter 1.5mm±0.1mm, with rounded corners as well.

[0043] A Kirschner wire fixing knob 106 is installed at the connection between the front end of the clamp arm and the dual-diameter compatible needle track 104. The Kirschner wire fixing knob 106 is a cylindrical block structure with a self-locking limiting groove 111 inside. It can cooperate with the Kirschner wire fixing knob 106 of an external device to limit the swing range of the Kirschner wire (maximum swing angle 5°) and prevent the Kirschner wire from slipping out. The Kirschner wire fixing knob has a threaded hole coaxial with the Kirschner wire hole 105 along the axial direction. The front end of the threaded hole extends to the edge of the Kirschner wire hole 105. In use, rotating the Kirschner wire fixing knob can move it axially. By pressing the Kirschner wire in the Kirschner wire hole 105 through the end face, the Kirschner wire is radially fixed, preventing its axial slippage.

[0044] The outer surface of the lower half of the two clamp arms is provided with a handle of anti-slip grip 113 and a pressure adjustment component. The anti-slip grip 113 has a mesh or raised dot structure to increase friction and prevent the operator from slipping when holding it. A leaf spring 110 is embedded in the inner side of the lower half of the two clamp arms. The two ends of the spring abut against the inner side of the lower half of the two clamp arms respectively. The spring elastic force is used to realize the automatic reset of the clamp arms, thereby realizing that the main body of the Kirschner wire opening clamp 1 tends to close when there is no external force.

[0045] The bottom of the second clamp arm 102 is fixedly connected to a screw 107 via a hinge seat 112. The other end of the screw 107 passes through a through hole at the bottom of the first clamp arm 101 and is threadedly connected to a pressure knob 108. When the pressure knob 108 is rotated, the screw 107 moves axially, pushing the first clamp arm 101 to open or close relative to the second clamp arm 102. A locking buckle 109 is provided at the rear end of the first clamp arm 101 near the pressure knob 108. It is a claw structure made of elastic metal sheet. One end of the locking buckle 109 is fixed to the first clamp arm 101, and the other end is a free end with a barb on the inside. When the clamp arm is adjusted to the target opening angle, the free end of the locking buckle 109 is pressed to make it engage with the limiting groove on the screw 107. Two grooves with a depth of 0.5 mm and a spacing of 2 mm are opened axially on the surface of the screw 107. The engagement of the barb with the groove prevents the screw 107 from sliding accidentally, thus fixing the position of the clamp arm.

[0046] Two Kirschner wire retractor forceps 1 are connected by a clamp 2, which includes a first fastener 201 and a second fastener 202, both of which are elastic plastic or metal snap-fit ​​structures. The first fastener 201 is L-shaped (opening to the left), and the second fastener 202 has an I-shaped protrusion on its inner side (opening to the right). The two are symmetrically arranged and connected by a hinge 203 and secured by the snap-fit. After one Kirschner wire retractor forceps 1 fixes the Kirschner wire, one opening 205 of the clamp 2 is fixed to the dual-diameter compatible needle channel at the top of the forceps arm of the Kirschner wire retractor forceps 1. The dual-diameter compatible needle channel of the other Kirschner wire retractor forceps 1 passes through the other opening 205 of the clamp 2, allowing the second Kirschner wire retractor forceps 1 to be combined when the wire is retracted. In this way, the two Kirschner wire retractor forceps 1 are interconnected. After connection, the doctor can independently control the retracting pressure adjustment component of each Kirschner wire retractor forceps 1, achieving the following multi-plane operation modes:

[0047] Two-way opening: By adjusting the opening and closing angles of the two Kirschner wire opening forceps 1 respectively, opening operations in different directions can be achieved, which is suitable for multi-plane fracture reduction needs;

[0048] Compression in two directions: Compression is applied to the two Kirschner wire spreading clamps 1 respectively to ensure stable fixation of multiple fracture ends;

[0049] Bilateral rigid distraction / compression in the same plane: Apply stable distraction or compression to the fracture sites on both sides in the same plane to ensure close fit and stable fixation of the fracture ends and promote bone healing;

[0050] Bilateral soft and hard stretching / compression on the same plane: Depending on the specific situation of the fracture site, one side is subjected to hard stretching / compression, while the other side is subjected to soft stretching / compression. This meets the personalized treatment needs of complex fractures, reduces damage to surrounding soft tissues, and improves surgical outcomes and patient recovery quality.

[0051] Combination operation of applying pressure in one direction and opening in one direction: In the same surgical scenario, one Kirschner wire opening forceps 1 is responsible for applying pressure and fixing, while another Kirschner wire opening forceps 1 is responsible for opening and repositioning, meeting the diverse needs of complex surgeries.

[0052] Workflow: First, prepare two Kirschner wire retracting pliers 1 (Kirschner wire retracting pliers one and Kirschner wire retracting pliers two). For example, select one Kirschner wire retracting pliers 1 with a dual-diameter compatible needle track length of 60cm and another with a dual-diameter compatible needle track length of 20cm. Select a Kirschner wire of appropriate diameter (such as 1.5mm or 2.0mm) as needed, and pass the Kirschner wire through the corresponding Kirschner wire hole 105 (large diameter Kirschner wire hole 1051 or small diameter Kirschner wire hole 1052). By rotating the Kirschner wire fixing knob 106, the knob moves axially, and the end face presses the Kirschner wire in the Kirschner wire hole 105 to achieve radial fixation of the Kirschner wire and prevent its axial slippage. Thus, the Kirschner wire is fixed on the Kirschner wire retracting pliers 1. Hold the anti-slip grip part 113 of the lower half of the Kirschner wire retracting pliers 1, and control the opening and closing of the pliers arm by opening the pressure adjustment component (rotating the pressure knob 108). Rotating the pressure knob 108 clockwise or counterclockwise moves the screw 107 axially, pushing the first clamp arm 101 to open or close relative to the second clamp arm 102, thereby achieving the operation of opening or pressing soft tissue. After reaching the appropriate position, the locking buckle 109 is used to fix it, preventing the screw 107 from slipping accidentally and ensuring the stability of the clamp arm position. If multi-planar opening and pressing is required, the two Kirschner wire opening clamps 1 are connected by the clamp 2. The dual-diameter compatible needle channel of one Kirschner wire opening clamp 1 is passed through one opening 205 of the clamp 2 and fixed, while the dual-diameter compatible needle channel of the other Kirschner wire opening clamp 1 is passed through the other opening 205 of the clamp 2. Then, by adjusting the opening and pressing adjustment components of the two Kirschner wire opening clamps 1 respectively, opening in two directions, pressing in two directions, or pressing in one direction plus opening in one direction can be achieved, thereby meeting the needs of complex surgical operations.

[0053] Working Principle: The arms of the Kirschner wire retractor forceps 1 of this invention are rotatably connected via a hinge shaft 103, forming an openable and closable structure similar to "scissors." Utilizing the lever principle, when the surgeon applies force to the lower half of the forceps arm (at the handle), the upper half of the forceps arm (at the Kirschner wire hole 105) produces a corresponding movement, realizing the retraction or compression of the Kirschner wire. The upper half of the forceps arm of the Kirschner wire retractor forceps 1 is C-shaped and has small holes on its surface for threading sutures or assisting in fixation, enhancing its applicability and flexibility during surgery. The Kirschner wire hole 105 at the top of the forceps arm adopts a multi-diameter compatible design, which can accommodate Kirschner wires of different diameters, expanding the instrument's applicability range. The Kirschner wire fixing knob 106, through its threaded hole and Kirschner wire hole 105, reliably fixes the Kirschner wire, preventing it from sliding or shifting during operation. The screw 107 in the pressure adjustment assembly is threadedly connected to the pressure knob 108, allowing precise control of the axial movement of the screw 107 by rotating the pressure knob 108, thereby controlling the opening angle of the clamp arms. The elastic metal sheet structure and barb design of the locking buckle 109 prevent accidental slippage of the screw 107 after adjustment to the appropriate position, ensuring the clamp arms are fixed in place. This adjustment and locking mechanism makes the instrument operation more precise and stable, meeting the needs of different surgical scenarios. The clamp 2, through the symmetrical arrangement of fastener 1 201 and fastener 202 and the connection of the hinge 203, allows the two Kirschner wire opening clamps 1 to be easily connected together and fixed by the fastener. This combined connection method enables the transformation from single-plane operation to multi-plane operation, providing more possibilities for complex surgical procedures and better adapting to the multi-dimensional structure of human tissues and surgical requirements.

[0054] The above specific embodiments are merely explanations of the present invention and are not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A traction bracket for traction Kirschner wires, characterized in that: The device includes several Kirschner wire opening pliers (1), each of which includes a first clamp arm (101) and a second clamp arm (102). A hinge shaft (103) is rotatably connected to the connection between the first clamp arm (101) and the second clamp arm (102), forming a symmetrical, openable clamp structure. The top ends of both the first clamp arm (101) and the second clamp arm (102) are provided with dual-diameter compatible pin channels (104). The dual-diameter compatible pin channels (104) include parallel large-diameter Kirschner wire holes (1051) and small-diameter Kirschner wire holes (1052), respectively adapted to Kirschner wires of different diameters. The top end of each clamp arm is provided with a Kirschner wire fixing knob (106). The Kirschner wire fixing knob (106) has a threaded hole coaxial with the Kirschner wire hole (105). By rotating the Kirschner wire fixing knob (1051), a Kirschner wire fixing mechanism can be established. 6) Achieve radial fixation of Kirschner wires; The lower half of the first clamp arm (101) and the second clamp arm (102) is provided with a spreading and pressurizing adjustment assembly, which includes a screw (107) passing through the bottom of the clamp arm, a pressurizing knob (108) threadedly connected to the screw (107), and a locking buckle (109) for locking the position of the screw (107); The traction bracket also includes a clamp (2) for connecting the two Kirschner wire spreading clamps (1), which includes a fastener one (201) and a fastener two (202) symmetrically arranged, which are connected by a hinge (203) and provided with a buckle fixing structure (204); The two Kirschner wire spreading clamps (1) are connected to each other by the clamp (2) with the dual-diameter compatible needle track (104) at the top of their clamp arms to achieve multi-plane operation.

2. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The dual-diameter compatible needle channel (104) has two length specifications: 60cm and 20cm; the diameter of the large-diameter Kirschner wire hole (1051) is 2.5mm±0.1mm, and the diameter of the small-diameter Kirschner wire hole (1052) is 1.5mm±0.1mm; the edges of the Kirschner wire holes (105) are all provided with a rounded corner structure of R0.2mm.

3. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The Kirschner wire fixing knob (106) has a self-locking limiting groove (111) inside to prevent the Kirschner wire from slipping out.

4. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: In the pressure adjustment assembly, one end of the screw (107) is fixed to the hinge seat (112) at the bottom of the second clamp arm (102), and the other end passes through the through hole at the bottom of the first clamp arm (101) and is connected to the pressure knob (108); the locking buckle (109) is an elastic metal sheet structure, located on the first clamp arm (101) near the pressure knob (108), and its free end is provided with a barb.

5. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The screw (107) has at least two limiting grooves with a depth of 0.5 mm along the axial direction on its surface. The barb of the locking buckle (109) cooperates with the limiting groove to prevent the screw (107) from sliding.

6. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The upper half of the first clamp arm (101) and the second clamp arm (102) are "C" shaped, and several small holes with a length of 0.3cm are evenly distributed on the surface for threading sutures, assisting in fixation, and reducing the weight of the clamp arms.

7. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The lower half of the first clamp arm (101) and the second clamp arm (102) are provided with a leaf spring (110), and the two ends of the spring abut against the two clamp arms respectively, so that the Kirschner wire opens the clamp (1) and closes automatically when there is no external force.

8. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The plurality of Kirschner wire spreading clamps (1), when combined by the clamps (2), can be independently controlled to achieve one of the following operating modes:

1. Spreading in two directions; 2. Applying pressure in two directions; 3. Rigid spreading / applying pressure on both sides of the same plane; 4. Apply soft and hard support / compression to both sides of the same plane; 5. Spread / pressurize in one direction, pressurize / spread in the other direction.

9. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The clamp (2) has a U-shaped bent structure for fastener one (201) and an I-shaped structure with a protrusion on the inner side for fastener two (202). The opening directions of the two fasteners are opposite. The two openings (205) of the clamp (2) are respectively sleeved on the outer wall of the double-diameter compatible needle channel (104) of the two Kirschner wire opening pliers (1) and the relative positions are locked by the snap-locking structure (204).

10. The traction bracket for traction Kirschner wires as described in claim 1, characterized in that: The lower half of the outer surface of the first clamp arm (101) and the second clamp arm (102) is provided with a non-slip grip part (113) with a mesh pattern or raised dot structure.

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