Kirschner wire bending device

Abstract

The present invention discloses a Kirschner wire bending device, comprising needle-nosed pliers, wherein two clamping pieces of the jaws of the needle-nosed pliers head clamp the Kirschner wire, one of the two clamping pieces of the jaws is a forming core block, the head of the needle-nosed pliers serves as a rotating axis, a contact of an outer sleeve for applying a bending force to the Kirschner wire rotates around the rotating axis, and the contact rotates toward the forming core block to bend the Kirschner wire clamped by the two clamping pieces around the forming core block. In the prior art, the pliers head is used to clamp the Kirschner wire first, and then another pair of pliers is used to bend it in the clamped state, which is time-consuming and labor-intensive. The present invention first uses the pliers head to clamp the Kirschner wire, which is in line with the usual clamping habits, and then uses a bending and scraping mechanism to move the Kirschner wire around the forming core block by a shifting block rotating around the rotating shaft to bend the Kirschner wire to form a required hook-shaped elbow. If the length of the Kirschner wire is appropriate after bending, the bending device is removed. If the length of the Kirschner wire is long after bending, continue to rotate to scrape the Kirschner wire off. During the scraping process, the Kirschner wire is always clamped; a limit groove is set on one side of the clamp to facilitate disengagement after bending and scraping; a ratchet wrench is set to save effort in the bending and scraping process.

Description

Technical Field

[0001] The invention relates to a forming and cutting method for surgical parts and a forming and cutting device, in particular to a bending and scraping method for orthopedic Kirschner wires and a bending and scraping device. Background Art

[0002] In orthopedic surgery, Kirschner wires are often used as Kirschner wires for broken bone docking and fixation. Generally, Kirschner wires are about 20 centimeters long and have diameters between 0.5 and 4 mm. They are available in several different specifications. They are used to fix fractures with low stress, such as short fractures or avulsion fractures, and are also often used to fix temporary fracture fragments in orthopedic surgery. During the operation, the Kirschner wires can be cut according to the size of the docked bones, and then inserted into the drilled bones for fixation, and the bent Kirschner wires are exposed outside the bones to prevent the needle tails left on the bone surface from piercing the skin or sinking into the bone surface and unable to be removed later. At present, needle holders or pliers are often used to complete the bending work, which is often time-consuming and laborious. The handle in the patent with publication number CN87212315U must be rotated 180 degrees to be able to bend the Kirschner wire. During the bending process, the side plane of the needle pressing block is always in contact with the Kirschner wire, making the entire length of the bender too long and very inconvenient to use. Therefore, there is currently no bender that can bend the Kirschner wire to the required angle at one time, and it is even more inconvenient to use the bender to continue to cut the Kirschner wire. In the previous patent applied by our company, the Kirschner wire is easily dislocated during the bending and scraping process because the fixed groove is used to limit the Kirschner wire; when the fixed groove is used as a rotating axis, the volume on both sides of the fixed groove is very small, and it is difficult to continue to set additional clamps on the fixed groove. Summary of the invention

[0003] The invention solves the technical problem of continuously applying a clamping force to the Kirschner wire during the bending and scraping process of the Kirschner wire.

[0004] A Kirschner wire bending device comprises needle-nosed pliers, wherein the two clamping pieces of the jaws of the needle-nosed pliers head clamp the Kirschner wire, one of the two clamping pieces of the jaws is a forming core block 6, the head of the needle-nosed pliers serves as a rotating axis, and a contact 3 of the outer sleeve that applies a bending force to the Kirschner wire rotates around the rotating axis, and the contact 3 rotates toward the forming core block 6 to bend the Kirschner wire clamped by the two clamping pieces around the forming core block 6.

[0005] The Kirschner wire bending and scraping device has one of the two clamping pieces of the jaws being a forming core block 6, and the other clamping piece of the jaws being provided with a limiting groove 5, which cooperates with the forming core block 6 to clamp the Kirschner wire to prevent the Kirschner wire from falling out during the scraping process.

[0006] In the Kirschner wire bending device, the scraping blade 4 on the contact 3 for scraping the Kirschner wire forms a scraping cut with the forming core block 6. After the contact 3 bends the Kirschner wire, the scraping blade 4 continues to rotate along the scraping cut to scrape and cut the clamped Kirschner wire.

[0007] The Kirschner wire bending device described herein has the head of the needle-nosed pliers as a rotating axis, and the contact 3 that applies bending force to the Kirschner wire rotates around the rotating axis. The head of the needle-nosed pliers, i.e., the rotating axis, is made into a rotating surface, a sleeve 302 is arranged outside the rotating surface, and the rotating member fixes the contact 3.

[0008] In the Kirschner wire bending device, the rotating surface forms a conical profile, and the conical profile is outer-engaged with a sleeve 302 that cooperates with it, so that the jaws of the head of the needle-nosed pliers can be opened to accommodate the Kirschner wire, and the sleeve 302 fixes the contact 3.

[0009] In the Kirschner wire bending device, the sleeve 302 is provided with a limit ring 3021, and during scraping, the limit ring 3021 prevents the sleeve 302 from escaping from the conical profile clamping part 1.

[0010] In the Kirschner wire bending device, the sleeve 302 is provided with a lever handle 3022, and the lever handle 3022 provides bending force and scraping force for the contact 3 and its scraping blade 4.

[0011] In the Kirschner wire bending device, a fixed handle 3023 cooperating with the lever handle 3022 is disposed on the side of the needle-nosed pliers 10, and the lever handle 3022 and the fixed handle 3023 cooperate to form a pair of handles to be held by hands.

[0012] In the Kirschner wire bending and scraping device, the lever handle 3022 is a ratchet wrench, and the shape of the portion where the sleeve 302 cooperates with the ratchet wrench is the shape of a nut that cooperates with the ratchet wrench.

[0013] In the prior art, the pliers head is used to clamp the Kirschner wire first, and then another pair of pliers is used to bend it in the clamped state, which is time-consuming and labor-intensive. The present invention first uses the pliers head to clamp the Kirschner wire, which is in line with the usual clamping habits, and then uses a bending and scraping mechanism to move the Kirschner wire around the forming core block by a shifting block rotating around the rotating shaft to bend the Kirschner wire to form a required hook-shaped elbow. If the length of the Kirschner wire is appropriate after bending, the bending device is removed. If the length of the Kirschner wire is long after bending, continue to rotate to scrape the Kirschner wire off. During the scraping process, the Kirschner wire is always clamped; a limit groove is set on one side of the clamp to facilitate disengagement after bending and scraping; a ratchet wrench is set to save effort in the bending and scraping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the clamping member opening structure of the present invention.

[0015] Figure 2 It is a schematic diagram of a scraping cut structure formed by closing the clamping member of the present invention and the scraping blade and the side of the forming core block.

[0016] Figure 3 yes Figure 1 Schematic diagram of the clamp holding the Kirschner wire.

[0017] Figure 4 It is a schematic cross-sectional structure diagram of a tapered sleeve sleeve tapered rotating shaft and a tapered sleeve fixed limit stop ring of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure of needle-nosed pliers.

[0019] Figure 6 It is a schematic diagram of the structure of the sleeve or conical sleeve fixing lever handle of the present invention.

[0020] Figure 7 It is a schematic diagram of the bending process of the Kirschner wire of the present invention. DETAILED DESCRIPTION

[0021] A Kirschner wire bending and scraping device, such as Figure 1 Figure 2 Figure 3 , including a clamping member 1 for clamping a Kirschner wire, the clamping member 1 includes two opening and closing parts for clamping the Kirschner wire, the two opening and closing parts of the clamping member 1 serve as a rotating axis, and the rotating axis can be a cylinder or a cone, so that a contact 3 provided with a bending force to apply a bending force to the Kirschner wire can be rotated around the clamping member 1, that is, the contact 3 rotates around the rotating axis, and the contact 3 presses the Kirschner wire to bend around the forming core block 6. After the Kirschner wire is bent, if the length of the Kirschner wire after bending is appropriate, then the bending device is removed. If the length of the Kirschner wire after bending is long, a scraping blade 4 on the contact 3 for scraping the Kirschner wire forms a scraping cut with a side 61 of the forming core block 6 at one end of the clamping member 1. Figure 2 The scraping blade 4 continues to rotate along the scraping cut, scraping the Kirschner wire during the rotation process until the scraping blade 4 contacts the side 61 of the forming core block 6 (the distance can also be very short so that the Kirschner wire is disconnected), and the clamped Kirschner wire is scraped and cut off.

[0022] The Kirschner wire bending and scraping device described above, the clamping member 1 includes two clamping plates for clamping the Kirschner wire, and at the ends of the two clamping plates, one of the clamping plates is provided with a limiting groove 5, and the limiting groove 5 prevents the Kirschner wire from falling out during the scraping process. The limiting groove 5 is provided on one side of the clamping plate because the bent Kirschner wire 80 abuts against two or three surfaces of the forming core block 6. For example, the patent for which this patent claims priority number is, after the bent Kirschner wire 80 is scraped off, it needs to be removed from the forming core block 6. The surface of the forming core block 6 that clamps the Kirschner wire is provided with a groove, which is not conducive to the Kirschner wire from falling out of the forming core block 6. Of course, a demoulding slope can be designed on the side of the forming core block 6 to facilitate the separation of the forming core block 6 from the bent and scraped Kirschner wire 80.

[0023] The device for bending and scraping the Kirschner wire described above has a forming core block 6 at the end of the two clamping pieces, and the other clamping piece is provided with the forming core block 6. After the contact 3 applies a bending force to the Kirschner wire to bend the Kirschner wire around the forming core block 6, the forming core block 6 is a column, and the scraping blade 4 on the contact 3 used for scraping the Kirschner wire forms a scraping cut with the side of the forming core block 6. The side of the forming core block 6 that forms the scraping cut with the scraping blade 4 can be the intersection line 61 of the two side surfaces of the forming core block 6, or can be a circular arc surface concentric with the rotation path of the scraping blade 4, such as the side circular arc surface of the forming core block 6 in the figure, and the scraping blade 4 continues to rotate along the scraping cut to scrape and cut the bent Kirschner wire. The shape of the forming core block 6 corresponds to the inner curved surface or inner curve of the bending of the Kirschner wire, and the inner curved surface or inner curve is equivalent to the inner contour shape of the hook.

[0024] At this time, if Figure 1 , the two opening and closing parts of the clamping member 1 are opened, the Kirschner wire 80 is placed in the opening, and then the two opening and closing parts of the clamping member 1 are closed, as shown in FIG. Figure 3 The Kirschner wire 80 is clamped by the limiting groove 5 and the corresponding side of the forming core block 6, and the contact 3 rests on the Kirschner wire. The contact 3 is rotated, and the contact 3 presses the Kirschner wire 80 to bend. The Kirschner wire 80 is bent to the desired bending shape, and the scraping edge 4 of the contact 3 and the intersection line 61 of the two side surfaces of the forming core block 6 form a scraping cut. The contact 3 continues to rotate, and the scraping edge 4 of the contact 3 scrapes and cuts the Kirschner wire 80. Then, the two opening and closing parts are opened, and the forming core block 6 is separated from the bent and scraped Kirschner wire 80.

[0025] In the Kirschner wire bending and scraping device, the outer sides of the two clamping pieces form a tapered profile. When the end diameters are the same, the tapered profile can withstand a greater torque, so that the end diameter is as small as possible; the outer side of the tapered profile is connected to the sleeve 302, and the sleeve 302 is connected to the fixed contact 3. The inner profile of the sleeve 302 matches the tapered profile formed on the outer sides of the two clamping pieces. Of course, if the outer sides of the two clamping pieces form a cylinder, the inner profile of the sleeve 302 is a matching circular tube, and the outer profile of the sleeve 302 can be a tapered profile or a cylindrical profile.

[0026] like Figure 4 In the device for bending and scraping the Kirschner wire, the sleeve 302 is provided with a limit ring 3021. During scraping, the limit ring 3021 and the conical surface jointly prevent the sleeve 302 from coming off the conical profile clamp 1. Of course, an annular boss or annular groove may be provided on the outside of the clamp 1, and the inner surface of the sleeve 302 matches the annular groove or annular boss to prevent the sleeve 302 from coming off the clamp 1.

[0027] like Figure 4 Figure 5 In the Kirschner wire bending and scraping device, the clamping member 1 for clamping the Kirschner wire is a needle-nosed pliers. Figure 4The shape of the cross-section of the needle-nosed pliers is shown, but the needle-nosed pliers is one of two parts hinged to each other. Along the two ends of the hinge axis of the ordinary needle-nosed pliers, a rotating body is arranged with the outer contour of the mouth of the part, leaving a groove for the movement of the other hinged part, so that the two clamping pieces of the jaws of the needle-nosed pliers are the two clamping pieces of the clamping member 1 that clamp the Kirschner wire, the limiting grooves 5 at the ends of the two clamping pieces of the jaws and the forming core block 6 clamp the Kirschner wire, and the clamping handle 10 of the needle-nosed pliers provides clamping force.

[0028] like Figure 6 In the Kirschner wire bending and scraping device, the sleeve 302 is provided with a trigger handle 3022, and the trigger handle 3022 provides a bending and scraping force for the contact 3 and its scraping blade 4. In this way, the clamping handle 10 of the needle-nosed pliers provides a clamping force and fixes the needle-nosed pliers, and the trigger handle 3022 provides a bending and scraping force. At this time, it is generally suitable for Kirschner wires with a diameter of 2 mm or less.

[0029] like Figure 7 In the device for bending and scraping a Kirschner wire, a fixed handle 3023 cooperating with the trigger handle 3022 is disposed on the side of the needle-nosed pliers 10, and the trigger handle 3022 and the fixed handle 3023 are matched to form a pair of hand-held handles. Since the trigger handle 3022 and the fixed handle 3023 are matched to form a pair of hand-held handles, the clamping handle 10 of the needle-nosed pliers is basically not affected by the bending and scraping force provided by the trigger handle 3022, and at this time, it is generally suitable for Kirschner wires with a diameter of 2mm-4mm.

[0030] In the Kirschner wire bending and scraping device, the trigger handle 3022 is a ratchet wrench, and the shape of the part where the sleeve 302 cooperates with the ratchet wrench is the shape of a nut that cooperates with the ratchet wrench. Since the trigger handle 3022 is a ratchet wrench, it is more convenient to use.

[0031] A Kirschner wire bending and scraping method comprises the following steps:

[0032] ⑴Clamp the Kirschner wire at the end of the rotating shaft, leaving the end of the Kirschner wire that needs to be bent and scraped exposed;

[0033] (2) Apply a bending force rotating around the axis to the end that needs to be bent and scraped to bend the Kirschner wire;

[0034] ⑶ The Kirschner wire is restricted from further bending after being bent to the required angle, and the Kirschner wire is restricted from further bending by the core block at the end of the rotating shaft;

[0035] (4) The blade rotating around the axis continues to apply scraping force to cut off the Kirschner wire.

[0036] The explanation of the Kirschner wire bending and scraping method of the present invention can refer to the implementation method of the Kirschner wire bending and scraping device.

Claims

1. A Kirschner wire bending device, comprising needle-nosed pliers, characterized in that: The two clamping pieces of the jaws of the needle-nosed pliers head clamp the Kirschner wire, one of the two clamping pieces of the jaws is a forming core block (6), the head of the needle-nosed pliers serves as a rotation axis, and the contact (3) of the outer sleeve that applies a bending force to the Kirschner wire rotates around the rotation axis, and the contact (3) rotates in the direction of the forming core block (6) to bend the Kirschner wire clamped by the two clamping pieces around the forming core block (6).

2. The Kirschner wire bending device according to claim 1, characterized in that: One of the two clamping pieces of the jaws is a shaped core block (6), and a limiting groove (5) is provided on the other clamping piece of the jaws. When the limiting groove (5) cooperates with the shaped core block (6) to clamp the Kirschner wire, the Kirschner wire is prevented from falling out during the scraping process.

3. The Kirschner wire bending device according to claim 1 or 2, characterized in that: The scraping blade (4) on the contact (3) for scraping the Kirschner wire forms a scraping cut with the forming core block (6); after the contact (3) bends the Kirschner wire, the scraping blade (4) continues to rotate along the scraping cut to scrape and cut the clamped Kirschner wire.

4. The Kirschner wire bending device according to claim 3, characterized in that: The head of the needle-nosed pliers serves as a rotation axis, and a contact (3) with an outer sleeve that applies a bending force to the Kirschner wire rotates around the rotation axis. A rotating surface is formed for the head of the needle-nosed pliers, i.e., the rotation axis, and a sleeve (302) is disposed outside the rotating surface. The rotating member fixes the contact (3).

5. The Kirschner wire bending device according to claim 4, characterized in that: The rotating surface forms a conical profile, and a sleeve (302) matching with the conical profile is sleeved outside the conical profile, so that the jaws of the head of the needle-nosed pliers can be opened to accommodate the Kirschner wire, and the sleeve (302) fixes the contact (3).

6. The Kirschner wire bending device according to claim 5, characterized in that: The sleeve (302) is provided with a limit ring (3021), and during scraping, the limit ring (3021) prevents the sleeve (302) from falling off the conical profile clamp (1).

7. The Kirschner wire bending device according to claim 6, characterized in that: The sleeve (302) is provided with a toggle handle (3022), and the toggle handle (3022) provides bending force and scraping force for the contact (3) and its scraping blade (4).

8. The Kirschner wire bending device according to claim 7, characterized in that: A fixed handle (3023) that cooperates with the lever handle (3022) is disposed on the side of the needle-nosed pliers (10); the lever handle (3022) and the fixed handle (3023) cooperate to form a pair of handles that can be gripped by hands.

9. The Kirschner wire bending device according to claim 8, characterized in that: The lever handle (3022) is a ratchet spanner, and the shape of the portion of the sleeve (302) that cooperates with the ratchet spanner is the shape of a nut that cooperates with the ratchet spanner.

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