A k-wire bender

Abstract

The application discloses a Kirschner wire bending device, which comprises left and right clamping blocks for clamping the Kirschner wire, and can be in the shape of a strip. The lower end of the left clamping block and the lower end of the right clamping block are rotationally connected, and the position of the rotationally connected part can be thickened to be in the shape of a pie, which is convenient for connection. A support plate extending to the lower right is connected to the lower end of the left clamping block, and a left clamping arm extending to the lower left is connected to the lower end of the right clamping block. The left and right clamping blocks are used for clamping the Kirschner wire, so that the Kirschner wire is prevented from sliding, and at the same time, force is applied from the lower side, so that the fractured block is prevented from being stressed when being bent. The device further comprises a rotating mechanism arranged on the left clamping block and capable of rotating the Kirschner wire to the left when the left clamping block rotates, and a right clamping arm mechanism rotationally connected to the end of the support plate. When the right clamping arm mechanism rotates to the left, the rotating mechanism is driven to rotate to bend the Kirschner wire. The rotating mechanism drives the upper end of the Kirschner wire to bend, and the left and right clamping blocks prevent force from being applied to the lower fractured block when being bent.

Description

Technical Field

[0001] This invention relates to the field of Kirschner wire bending devices, specifically a Kirschner wire bending device. Background Technology

[0002] Kirschner wires are a commonly used internal fixation material in orthopedics. Their original specifications generally include a length of around 20cm and a diameter ranging from 0.5 to 3.5 millimeters in several different sizes. They are used to fix fracture fragments or avulsion fractures, and are also frequently used for temporary fixation of fracture fragments during orthopedic surgery. Due to their widespread use, the maximum diameter of Kirschner wires has gradually increased to 4 millimeters. Along with external fixation devices, they are used in conjunction with locking screws to fix larger fractures in emergencies such as pelvic fractures and calcaneal fractures.

[0003] In practical use, after the Kirschner wire is fixed, its tail needs to be bent. Bending helps stabilize the Kirschner wire and protects the local skin. Currently, bending is often done by directly clamping it with pliers. The drawback of this is that the end closest to the fracture fragment is tilted and compressed by the bending of the upper pliers, resulting in a relatively large compressive force on the fracture fragment, which may lead to further fracture. Therefore, how to reduce the force on the fracture fragment during bending is an urgent problem that orthopedic surgeons need to solve. Summary of the Invention

[0004] The purpose of this invention is to provide a Kirschner wire bending device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a Kirschner wire bending device, comprising a left clamping block and a right clamping block for holding Kirschner wires, which may be strip-shaped. The lower ends of the left clamping block and the lower ends of the right clamping block are rotatably connected. At the rotatable connection position, the connection can be thickened to a disc shape for easy connection. The lower end of the left clamping block is connected to a support plate extending downward to the right, and the lower end of the right clamping block is connected to a left clamping arm extending downward to the left. The left and right clamping blocks are used to clamp the Kirschner wires, preventing them from slipping. Simultaneously, they apply force from below, preventing stress on the fracture fragments during bending.

[0006] It also includes a rotating mechanism that bends the Kirschner wire to the left when rotating on the left clamping block, and a right clamping arm mechanism rotatably connected to the end of the support plate. When the right clamping arm rotates to the left clamping arm, it drives the rotating mechanism to rotate, thereby bending the Kirschner wire. The rotating mechanism bends the upper end of the Kirschner wire, while the left and right clamping blocks prevent force from being applied to the lower fracture fragment during bending. In this way, the force during bending is distributed among the left and right clamping blocks and the rotating mechanism, thus avoiding stress on the lower fracture fragment.

[0007] Preferably, the rotating mechanism includes a support rod vertically fixed to the lower side of the front end of the left clamping block, and the front end of the support rod is rotatably connected to a rotating rod capable of flipping left and right via a pin. The front end of the rotating rod is fixed with an upward-facing bending block parallel to the right clamping block. The rotating rod extends backward beyond the pin to form a rotating part that applies force for rotation. The shape of the bending block can correspond to that of the right clamping block, and it can flip to the left to bend the Kirschner wires.

[0008] Preferably, the right clamp arm mechanism includes a right clamp arm hinged to the end of the support plate, and the right clamp arm extends upward to form a pull plate that drives the rotating part to rotate, and the end of the pull plate and the end of the rotating part are connected by a connector. The connector is connected between the end of the rotating part and the end of the pull plate, driving the rotating part and the rotating rod to rotate.

[0009] Preferably, the connector is a pull rope. Compared to a pull rod, a pull rope can rotate and has lower installation requirements. If a pull rod is used, the connecting end needs to be able to rotate like a swivel ball.

[0010] Preferably, the length of the pull plate is greater than the distance from the end of the rotating part to the pin to increase the flipping angle. This is mainly to ensure that the pulling angle is greater than 180°, so as to achieve a 180° bend.

[0011] Preferably, a torsion spring is also included between the pin and the rotating rod. This keeps the bending block on the right side, allowing it to open up relative to the left clamping block, while also pressing the pull plate against the support plate to prevent wobbling.

[0012] Preferably, the support plate is in the shape of an arc that curves to the right at its lower end. This increases the opening distance and facilitates the rotation of the right clamp arm.

[0013] Preferably, the pull plate is an arc shape with its center on the right, and the lower end of the rotating part is curved to the left in an arc to increase the rotation range and the flipping range.

[0014] Preferably, the end of the pull plate extends forward to form an extension portion that extends forward from the pin, and the end of the pull rope is tied to the end of the extension portion. The extension portion increases the forward height, facilitating a 180° bend and improving the bending angle.

[0015] Preferably, both the left and right clamping blocks have arc-shaped clamping grooves at their opposite ends, and multiple sets of clamping grooves with different diameters are provided along the length direction. The left end of the bending block also has a corresponding clamping groove. The clamping grooves are to prevent the Kirschner wires from sliding.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The left and right clamping blocks hold the Kirschner wire. When the left and right clamping arms are squeezed, the right clamping arm applies a compressive force to the support plate. The support plate drives the left clamping block, and the left clamping arm drives the right clamping block. The two clamp the Kirschner wire together. At the same time, the pull plate connected to the right clamping arm rotates around the support plate, pulling the pull rope, which in turn drives the rotating part and the rotating rod to rotate. This causes the bending block to push the Kirschner wire to the left, achieving bending. Here, due to the obstruction of the left clamping block, the Kirschner wire will not compress the fracture fragment, avoiding stress on the fracture fragment and protecting it.

[0018] 2. The bending block rotates around the pin and there is a distance between it and the left clamping block. When it gets close to the left clamping block, it will press down and the distance will decrease, thereby reducing the bending arc and improving the bending effect. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 This is a first axonometric view of the present invention;

[0021] Figure 3 This is a second isometric view of the present invention.

[0022] In the diagram: 1. Left clamping block; 11. Support plate; 12. Right clamping arm; 13. Pull plate; 14. Pull rope; 15. Torsion spring; 16. Extension; 2. Right clamping block; 21. Left clamping arm; 3. Support rod; 31. Rotating rod; 32. Bending block; 33. Rotating part. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 3This invention provides a Kirschner wire bending device: a Kirschner wire bending device includes a left clamping block 1 and a right clamping block 2 for holding Kirschner wires. These clamping blocks can be strip-shaped. The lower ends of the left clamping block 1 and the right clamping block 2 are rotatably connected. At the rotatable connection point, the clamping blocks can be thickened to a disc shape for easier connection. A support plate 11 extending downwards to the right is connected to the lower end of the left clamping block 1, and a left clamping arm 21 extending downwards to the left is connected to the lower end of the right clamping block 2. The left clamping block 1 and the right clamping block 2 are used to clamp the Kirschner wires, preventing them from slipping. Simultaneously, force is applied from below to prevent stress on the fracture fragments during bending. Each of the opposite ends of the left clamping block 1 and the right clamping block 2 has an arc-shaped clamping groove, and multiple sets of grooves with different diameters are provided along the length direction. A corresponding clamping groove is also provided on the left end of the bending block 32. The clamping grooves prevent the Kirschner wires from slipping.

[0025] It also includes a rotating mechanism that bends the Kirschner wire to the left when the left clamping block 1 rotates, and a right clamping arm mechanism rotatably connected to the end of the support plate 11. When the right clamping arm mechanism rotates towards the left clamping arm 21, it drives the rotating mechanism to rotate and bend the Kirschner wire. The rotating mechanism bends the upper end of the Kirschner wire, while the left clamping block 1 and the right clamping block 2 prevent force from being applied to the lower fracture fragment during bending. In this way, the force during bending is distributed among the left clamping block 1, the right clamping block 2, and the rotating mechanism, thereby avoiding force on the lower fracture fragment.

[0026] The rotating mechanism includes a support rod 3 vertically fixed to the lower front end of the left clamping block 1. The front end of the support rod 3 is rotatably connected to a rotating rod 31 capable of flipping left and right via a pin. The front end of the rotating rod 31 is fixed with an upward-facing bending block 32 parallel to the right clamping block 2. The rotating rod 31 extends backward beyond the pin to form a rotating part 33 that applies force for rotation. The shape of the bending block 32 can correspond to that of the right clamping block 2, and it can flip to the left to bend the Kirschner wires.

[0027] The right clamp arm mechanism includes a right clamp arm 12 hinged to the end of the support plate 11, and the right clamp arm 12 extends upward to form a pull plate 13 that drives the rotating part 33 to rotate. The end of the pull plate 13 is connected to the end of the rotating part 33 by a connector. The connector is connected between the end of the rotating part 33 and the end of the pull plate 13, driving the rotating part 33 and the rotating rod 31 to rotate. The connector is a pull rope 14. Compared to the pull rod, the pull rope 14 can rotate, which reduces installation requirements. If a pull rod is used, the connecting end needs to be able to rotate like a swivel ball. The length of the pull plate 13 is greater than the distance from the end of the rotating part 33 to the pin to increase the flipping angle. This is mainly to ensure that the pulling angle is greater than 180°, achieving a 180° bend.

[0028] It also includes a torsion spring 15 disposed between the pin and the rotating rod 31. Keeping the bending block 32 on the right side, it can open up between itself and the left clamping block 1, while also allowing the pull plate 13 to be pressed against the support plate 11 to prevent wobbling.

[0029] The support plate 11 is an arc shape with its lower end curved to the right. This increases the opening distance, facilitating the rotation of the right clamp arm 12. The pull plate 13 is an arc shape with its center on the right side, and the lower end of the rotating part 33 is curved to the left to increase the rotation range. This also increases the flipping range.

[0030] The end of the pull plate 13 extends forward to form an extension 16 that extends forward from the pin, and the end of the pull rope 14 is tied to the end of the extension 16. The extension 16 increases the forward height, making it easier to bend up to 180° and increasing the bending angle.

[0031] Working principle: The left clamping block 1 and the right clamping block 2 hold the Kirschner wire. When the left clamping arm 21 and the right clamping arm 12 are squeezed, the right clamping arm 12 applies a compressive force to the support plate 11. The support plate 11 drives the left clamping block 1, and the left clamping arm 21 drives the right clamping block 2. The two clamp the Kirschner wire together. At the same time, the pull plate 13 connected to the right clamping arm 12 rotates around the support plate 11, pulling the pull rope 14, which in turn drives the rotating part 33 and the rotating rod 31 to rotate. This causes the bending block 32 to push the Kirschner wire to the left, achieving bending. Here, due to the obstruction of the left clamping block 1, the Kirschner wire will not compress the fracture fragment, avoiding stress on the fracture fragment and protecting it. The bending block 32 rotates around the pin and has a distance between it and the left clamping block 1. When it gets closer to the left clamping block, it will press down, reducing the distance and thus reducing the bending arc, resulting in a better bending effect.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A Kirschner wire bender, comprising a left clamp block (1) and a right clamp block (2) clamping a Kirschner wire, the lower end of the left clamp block (1) and the lower end of the right clamp block (2) being pivotally connected, characterized in that: The lower end of the left clamp block (1) is connected with a support plate (11) extending to the lower right, and the lower end of the right clamp block (2) is connected with a left clamp arm (21) extending to the lower left; Further comprising a rotating mechanism arranged on the left clamp block (1) and capable of rotating and bending the Kirschner wire to the left when rotating, and a right clamp arm mechanism rotatably connected to the end of the support plate (11), which is capable of rotating the rotating mechanism to bend the Kirschner wire when the left clamp arm (21) rotates; The rotating mechanism comprises a support rod (3) vertically fixed to the lower side of the front end of the left clamp block (1), and the front end of the support rod (3) is rotatably connected with a rotary rod (31) capable of left-right flipping through a pin shaft, and the front end of the rotary rod (31) is fixed with a bending block (32) upward and parallel to the right clamp block (2), and the rotary rod (31) extends backward to form a rotating part (33) for force rotation after the pin shaft; The right clamp arm mechanism comprises a right clamp arm (12) hingedly connected to the end of the support plate (11), and the right clamp arm (12) extends upward to form a pull plate (13) for rotating the rotating part (33), and the end of the pull plate (13) is connected with the end of the rotating part (33) through a connecting piece; The bending block (32) rotates around the pin shaft and has a distance from the left clamp block (1), when close to the left clamp block (1), it will be pressed down, the distance will be reduced, so as to reduce the bending curvature.

2. The K-wire bender of claim 1, wherein: The connecting piece is a pull rope (14).

3. A K-wire bender according to claim 2, wherein: The length of the pull plate (13) is greater than the distance from the end of the rotating part (33) to the pin shaft, so as to increase the flipping angle.

4. The K-wire bender of claim 3, wherein: Further comprising a torsion spring (15) arranged between the pin shaft and the rotary rod (31).

5. The K-wire bender of claim 4, wherein: The support plate (11) is arc-shaped with the lower end bending to the right.

6. The K-wire bender of claim 5, wherein: The pull plate (13) is arc-shaped with the center of the circle located on the right side, and the lower end of the rotating part (33) is bent to the left arc to increase the rotating range.

7. The K-wire bender of claim 6, wherein: The end of the pull plate (13) extends forward to form an extension part (16) extending out of the pin shaft, and the end of the pull rope (14) is tied to the end of the extension part (16).

8. The K-wire bender of claim 1, wherein: The opposite ends of the left clamp block (1) and the right clamp block (2) are both provided with arc-shaped clamping grooves, and the clamping grooves are provided with multiple groups of different diameters along the length direction, and the left end of the bending block (32) is also provided with a clamping groove.

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