A Kirschner wire bending device

Abstract

The invention discloses a Kirschner wire bending device, comprising a first clamp arm and a second clamp arm, wherein the first clamp arm and the second clamp arm are movably connected at their front ends, a slider is slidably connected to the front end of the first clamp arm away from the second clamp arm, a push rod is threadedly connected to both sides of the slider, a bending portion is further provided at the front end of the first clamp arm away from the second clamp arm, a Kirschner wire placement groove is formed between the bending portion and the front end of the slider; two clamping plates are integrally formed at the front end of the second clamp arm, the clamping plates are provided with strip holes, and the push rod is slidably connected to the strip holes; a bending arm is hinged at the front end of the first clamp arm, and the bending arm performs a rotational motion perpendicular to the plane formed by the first clamp arm and the second clamp arm. The device can realize the rapid bending of the Kirschner wire, is simple to operate, labor-saving, and has a controllable bending angle, and the entire device is easy to disassemble and assemble, and is convenient for assembly, maintenance, and all-round disinfection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a Kirschner wire bending device. Background Art

[0002] Kirschner wire is a commonly used internal fixation material in orthopedics. It is used to fix fractures with low stress, such as short fractures or avulsion fractures, and is also used to fix temporary fracture fragments in orthopedic surgery. As a commonly used auxiliary reduction and fixation device, Kirschner wire provides great convenience for orthopedic surgery, but there are defects such as damage to surrounding soft tissues and displacement during surgery. In order to solve this problem, a device is needed to bend the exposed Kirschner wire and bury it under the skin.

[0003] A Kirschner wire bender is a basic medical device used to bend Kirschner wires protruding from the bone to prevent the sharp end from damaging the surrounding soft tissue or bone. Therefore, it is widely used in orthopedic surgery. Although existing Kirschner wire benders can bend Kirschner wires, the bending effect is poor and it is easy to cause displacement during the bending process. Summary of the invention

[0004] The present invention aims to provide a Kirschner wire bending device to solve the technical problems that the existing Kirschner wire bender has poor bending effect and is prone to displacement during the bending process.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A Kirschner wire bending device comprises a first clamp arm and a second clamp arm, wherein the first clamp arm and the second clamp arm are movably connected at their front ends, a side of the front end of the first clamp arm facing away from the second clamp arm is slidably connected to a slider, both sides of the slider are threadedly connected to a push rod, a bending portion is also provided at the side of the front end of the first clamp arm facing away from the second clamp arm, a Kirschner wire placement groove is formed between the bending portion and the front end of the slider; two clamping plates are integrally formed at the front end of the second clamp arm, the clamping plates are provided with strip holes, and the push rod is slidably connected to the strip holes; a bending arm is hinged at the front end of the first clamp arm, the bending arm makes a rotational motion perpendicular to the plane formed by the first clamp arm and the second clamp arm, and the front end of the bending arm can be flush with the front end of the slider.

[0007] The technical principle of the present technical solution is as follows: the present device places the end of the Kirschner wire to be bent in the Kirschner wire placement groove, closes the first clamp arm and the second clamp arm, and the bar hole of the second clamp arm pushes the push rod to move the slider forward until the Kirschner wire is clamped, and then the bending arm is rotated, and the front end of the bending arm abuts against the end of the Kirschner wire to be bent and bends it around the bending portion.

[0008] The beneficial technical effects of the technical solution are as follows: the Kirschner wire bending device can realize rapid bending of the Kirschner wire, the Kirschner wire is not easy to shift during the bending process, the operation is simple and labor-saving, the bending angle is controllable, and disassembly and assembly are convenient.

[0009] Preferably, a step surface is provided on the side of the front end portion of the first clamp arm facing away from the second clamp arm, the bending portion is arranged at the front end of the step surface, a protrusion with an inverted trapezoidal cross-section is provided in the middle of the step surface, the rear end of the step surface is magnetically connected to a magnet block, and a groove matching the protrusion is provided on the side of the slider close to the first clamp arm, and when the rear end of the slider abuts the magnet block, the length of the protrusion in the groove is less than the distance from the rear end of the slider to the vertical surface of the step surface.

[0010] By adopting the above technical solution, the magnet block can restrain the bending arm to prevent the bending arm from rotating randomly when the device is in use and affecting the operation; and after removing the magnet block, the slider can be moved backward and disassembled, making the device easy to disassemble and assemble, and convenient for assembly, maintenance and all-round disinfection.

[0011] Preferably, the bending portion comprises a semicircular cylinder, and the arc surface of the semicircular cylinder is convex to the side of the initial position when the bending arm performs the rotational motion.

[0012] By adopting the above technical solution, the bending effect of the Kirschner wire is good.

[0013] Preferably, there is a smooth transition between the arc surface and the plane of the semicircular cylinder.

[0014] By adopting the above technical solution, the end of the Kirschner wire to be bent is not easily damaged during bending.

[0015] Preferably, a right-angled trapezoidal body is integrally formed on one side of the plane of the semicircular cylinder, the right-angled surface of the right-angled trapezoidal body is parallel to the front end surface of the slider, the upper bottom surface of the right-angled trapezoidal body is far away from the semicircular cylinder, and the lower bottom surface of the right-angled trapezoidal body is the same size as the plane of the semicircular cylinder.

[0016] By adopting the above technical solution, the maximum bending angle of the Kirschner wire can be limited by the right-angle trapezoidal body to avoid excessive bending angle, which is not conducive to subsequent use.

[0017] Preferably, the bending arm is provided with a through inner cavity along the axial direction, the front end of the inner cavity has a first chamber, the first chamber is rotatably connected to a fan-shaped block through a fixed shaft with a torsion spring, the rear end of the inner cavity has a threaded section, and a control rod is threadedly connected through the threaded section, the front end of the control rod abuts against the large end of the fan-shaped block, and the rear end of the control rod extends out of the inner cavity and is fixedly connected to a knob.

[0018] With the above technical solution, when the bending arm does not have a large rotation space, the control rod can be rotated by the knob to make the sector block extend out of the inner cavity. When the bending arm rotates by a certain angle, the Kirschner wire can obtain a bending angle larger than that angle, improving the applicability of the device.

[0019] Preferably, a curved leaf spring is fixed to the inner sides of the rear ends of the first clamping arm and the second clamping arm, and the two leaf springs are bent towards each other, and the free ends of the two leaf springs are connected.

[0020] With the above technical solution, the two leaf springs provide a resetting ability, and the slider can move backward when released, facilitating the removal of the Kirschner wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded view of a Kirschner wire bending device provided by an embodiment of the present invention;

[0022] Figure 2 A front view of a Kirschner wire bending device provided by an embodiment of the present invention;

[0023] Figure 3 A right view of a Kirschner wire bending device provided by an embodiment of the present invention;

[0024] Figure 4 A schematic structural view of a slider of a Kirschner wire bending device provided by an embodiment of the present invention;

[0025] Figure 5 A cross-sectional view of a bending arm of a Kirschner wire bending device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described in detail below with reference to the drawings and embodiments:

[0027] The reference numerals in the accompanying drawings of the specification include: the first clamping arm 1, the second clamping arm 2, the clamping plate 3, the bending part 4, the protrusion 5, the slider 6, the Kirschner wire placement groove 7, the magnet block 8, the push rod 9, the strip-shaped hole 10, the bending arm 11, the inner cavity 12, the first chamber 121, the threaded section 122, the sector block 13, the control rod 14, the knob 15, the leaf spring 16, the square pin 17, the semi-cylindrical body 18, and the right trapezoid body 19.

[0028] The embodiment is basically as Figure 1 、 Figure 2 and Figure 3 shown. A Kirschner wire bending device includes a first clamping arm 1 and a second clamping arm 2. Two clamping plates 3 are integrally formed at the front end of the second clamping arm 2, and the two clamping plates 3 of the second clamping arm 2 and the front end of the first clamping arm 1 are movably connected by a pin shaft.

[0029] On the side of the front end of the first clamping arm 1 facing away from the second clamping arm 2, there is a stepped surface. A bent portion 4 is fixedly connected to the front end of the stepped surface, and a convex portion 5 with a trapezoidal cross-section is fixedly connected to the middle of the stepped surface. The stepped surface is slidably connected to a slider 6 through the convex portion 5, that is, a groove matching the convex portion 5 is formed on the side of the slider 6 close to the first clamping arm 1. Refer to Figure 4 . A Kirschner wire placement groove 7 is formed between the bent portion 4 and the front end of the slider 6. A magnet block 8 is magnetically connected to the rear end of the stepped surface. When the rear end of the slider 6 abuts against the magnet block 8, the length of the convex portion 5 located in the groove is less than the distance from the rear end of the slider 6 to the vertical surface of the stepped surface. When the magnet block 8 is removed, the slider 6 can be moved backward and taken out, which is convenient for disassembly, installation and replacement. A push rod 9 is threadedly connected to both sides of the slider 6. The clamping plate 3 is provided with a strip-shaped hole 10, and the push rod 9 is slidably connected to the strip-shaped hole 10.

[0030] A bent arm 11 is hinged to the front end of the first clamping arm 1. The bent arm 11 rotates perpendicular to the plane formed by the first clamping arm 1 and the second clamping arm 2. The front end of the bent arm 11 can be flush with the front end of the slider 6. An iron block is provided at the position of the bent arm 11 corresponding to the magnet block 8. When the bent arm 11 approaches the first clamping arm 1 and the second clamping arm 2, the magnet block 8 can be magnetically connected to the iron block to prevent the bent arm 11 from shaking randomly during operation.

[0031] Refer to Figure 5 , a through cavity 12 is provided along the axial direction of the bent arm 11. The front end of the cavity 12 has a first chamber 121. A sector block 13 is rotatably connected to the first chamber 121 through a fixed shaft with a torsion spring. The rear end of the cavity 12 has a threaded section 122, and a control rod 14 is threadedly connected through the threaded section 122. The front end of the control rod 14 abuts against the large head end of the sector block 13. The rear end of the control rod 14 extends out of the cavity 12 and is fixedly connected with a knob 15.

[0032] On the inner sides of the rear ends of the first clamping arm 1 and the second clamping arm 2, a bent leaf spring 16 is fixed. It is fixed by a square pin 17 to prevent the leaf spring 16 from rotating relative to the first clamping arm 1 and the second clamping arm 2. The two leaf springs 16 are bent towards each other. The free end of one leaf spring 16 has a concave portion, and the free end of the other leaf spring 16 has a convex portion. The two leaf springs 16 are cooperatively lapped through the concave portion and the convex portion, which is convenient for disassembly and installation without affecting its reset performance.

[0033] The bent portion 4 includes a semi-cylindrical body 18, and the arc surface of the semi-cylindrical body 18 protrudes towards the initial position side when the bent arm 11 makes a rotary motion. The arc surface and the plane of the semi-cylindrical body 18 are smoothly transitioned. A right-angled trapezoid body 19 is integrally formed on the plane side of the semi-cylindrical body 18. The right-angled surface of the right-angled trapezoid body 19 is parallel to the front end surface of the slider 6. The upper bottom surface of the right-angled trapezoid body 19 is far from the semi-cylindrical body 18, and the lower bottom surface of the right-angled trapezoid body 19 is of the same size as the plane of the semi-cylindrical body 18.

[0034] An arc-shaped groove is provided along the radial direction at the front end of the bent arm 11 and the front end of the slider 6, and transverse teeth covering the arc-shaped groove are provided at the front end of the bent arm 11 and the front end of the slider 6, so as to prevent the Kirschner wire from deflecting or falling off during bending.

[0035] The specific implementation process is as follows: During use, first place the end of the Kirschner wire to be bent in the Kirschner wire placement groove 7, close the first clamp arm 1 and the second clamp arm 2. The strip-shaped hole 10 of the second clamp arm 2 makes the slider 6 slide forward along the protrusion 5 by pushing the push rod 9 until the arc-shaped groove and the bent portion 4 jointly clamp the Kirschner wire. Then rotate the bent arm 11, and the front end of the bent arm 11 abuts against the end of the Kirschner wire to be bent and bends it around the bent portion 4. When the rotation space is not enough to bend the bent arm 11 to the predetermined angle, the knob 15 can be rotated to make the control rod 14 move forward. The control rod 14 pushes the sector block 13 to rotate around the fixed axis until part of the sector block 13 is exposed from the cavity, so that when the bent arm 11 rotates, the bending angle of the Kirschner wire is greater than the rotation angle of the bent arm 11. After use, rotate the knob 15 in the reverse direction to make the control rod 14 move backward, and the sector block 13 resets under the action of the torsion spring, that is, the sector block 13 retracts into the first chamber 121.

[0036] The above are only embodiments of the present invention, and common general technical solutions and / or characteristics in the solutions are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A Kirschner wire bending device, characterized in that: It includes a first clamp arm and a second clamp arm. The front ends of the first clamp arm and the second clamp arm are movably connected by a pin shaft. On the side of the front end of the first clamp arm facing away from the second clamp arm, a slider is slidably connected. On both sides of the slider, a push rod is threadedly connected. On the side of the front end of the first clamp arm facing away from the second clamp arm, there is also a bent portion. A Kirschner wire placement groove is formed between the bent portion and the front end of the slider. At the front end of the second clamp arm, two clamping plates are integrally formed. The clamping plates are provided with strip-shaped holes, and the push rod is slidably connected with the strip-shaped holes. The front end of the first clamp arm is hinged with a bent arm, and the bent arm makes a rotary motion perpendicular to the plane formed by the first clamp arm and the second clamp arm. The front end of the bent arm can be flush with the front end of the slider. On the side of the front end of the first clamp arm facing away from the second clamp arm, there is a stepped surface. The bent portion is arranged at the front of the stepped surface. In the middle of the stepped surface, there is a protrusion with an inverted trapezoidal cross-section. At the rear end of the stepped surface, a magnet block is magnetically connected. On the side of the slider close to the first clamp arm, a groove matching the protrusion is provided. When the rear end of the slider abuts against the magnet block, the length of the protrusion located in the groove is less than the distance from the rear end of the slider to the vertical surface of the stepped surface.

2. The Kirschner wire bending device according to claim 1, wherein: The bent portion includes a semi-cylindrical body, and the arc surface of the semi-cylindrical body protrudes towards the initial position side when the bent arm makes a rotary motion.

3. The Kirschner wire bending device according to claim 2, characterized in that: The arc surface and the plane of the semi-cylindrical body are smoothly transitioned.

4. The k-wire bending device according to claim 2, characterized in that: On the plane side of the semi-cylindrical body, a right-angled trapezoid body is integrally formed. The right-angled surface of the right-angled trapezoid body is parallel to the front end surface of the slider. The upper bottom surface of the right-angled trapezoid body is far from the semi-cylindrical body, and the lower bottom surface of the right-angled trapezoid body is of the same size as the plane of the semi-cylindrical body.

5. A Kirschner wire bending device according to any one of claims 3 or 4, characterized in that: The bent arm is provided with a through cavity along the axial direction. The front end of the cavity has a first chamber. A sector block is rotatably connected to the first chamber through a fixed shaft with a torsion spring. The rear end of the cavity has a threaded section, and a control rod is threadedly connected through the threaded section. The front end of the control rod abuts against the large end of the sector block. The rear end of the control rod extends out of the cavity and is fixedly connected with a knob.

6. The Kirschner wire bending device according to claim 5, characterized in that: On the inner sides of the rear ends of the first clamp arm and the second clamp arm, a bent leaf spring is fixed. The two leaf springs are bent towards each other, and the free ends of the two leaf springs are connected.

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