A k-wire assembly

Abstract

This utility model relates to the field of Kirschner wires and discloses a Kirschner wire assembly, including a needle body (1) and a protective head (2) for mounting on one end of the needle body (1). One end of the needle body (1) is the needle tip end (3), and the other end is the needle tail end (4). The needle tail end (4) has a hook structure. The protective head (2) has a mounting groove (5) for mounting the hook structure inside. In the installation state, the hook structure is fixedly installed in the mounting groove (5). This Kirschner wire assembly has the advantages of good protection and convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of Kirschner wires, specifically, it relates to a Kirschner wire assembly. Background Technology

[0002] Kirschner wires are one of the most commonly used internal fixation materials in hand and foot microsurgery. When orthopedic surgeons use Kirschner wires to fix and reduce fractures in the hand and other areas, they often cut the wires, leaving the exposed end protruding from the skin. However, this clinical use presents several problems: the exposed end easily snags on the body or clothing and can be pulled out, causing psychological distress to the patient, increasing the risk of injury, and potentially becoming a source of infection.

[0003] Existing patent application CN211749983U discloses a tail button structure for Kirschner wires, which uses a snap-lock structure to restrict and protect the tail of the wire. However, this structure has the following disadvantages: it is inconvenient to operate and the Kirschner wire is easy to shake, which may cause secondary injury. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a Kirschner wire assembly.

[0005] A Kirschner wire assembly includes a needle body and a protective head for mounting on one end of the needle body. One end of the needle body is the needle tip end, and the other end is the needle tail end. The needle tail end has a hook structure. The protective head has a mounting groove inside for mounting the hook structure. In the installation state, the hook structure is fixedly mounted in the mounting groove.

[0006] Preferably, the protective head includes a housing and an internal movable sleeve, and also includes a spring that supports the movable sleeve to move up and down. The housing is provided with a plug hole, and a limit post is provided on the plug hole. The mounting groove is provided on the movable sleeve, and the hook structure passes through the plug hole and is installed in the mounting groove, with the hook hooked on the limit post.

[0007] Preferably, there are two insertion holes symmetrically distributed on both sides of the movable sleeve. The insertion holes are connected to the internal mounting groove. The needle tail end installed in the mounting groove is restricted between the bottom surface of the mounting groove and the upper side of the insertion hole under the action of the spring. When the movable sleeve is pressed down, the needle tail end is released from the restriction of the upper side of the insertion hole.

[0008] Preferably, the bottom of the movable sleeve is provided with a spring hole, and the spring is installed in the spring hole.

[0009] Preferably, the movable sleeve includes an upper pressing end, a bottom plate, and a connecting post connecting the bottom plate and the pressing end, with the axial projection of the connecting post falling within the axial projection of the bottom plate and the pressing end.

[0010] Preferably, the insertion hole is keyway shaped, and the limiting post is connected to the upper and lower sides of the insertion hole.

[0011] Preferably, the diameter of the needle body is 0.6 mm to 2.0 mm.

[0012] Compared with existing technologies, this solution has the following advantages: the protective structure uses a spring clip to ensure that the installation process does not require closing the cover, making it very convenient to remove and install, and it provides better protection and can be adapted to Kirschner wires of different sizes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the device.

[0014] Figure 2 This is a schematic diagram of the overall structure of the device.

[0015] Figure 3 This is a cross-sectional view of the device.

[0016] The technical names of the reference numerals in the figure are as follows: 1—needle body, 2—protective head, 3—needle tip end, 4—needle tail end, 5—mounting groove, 6—movable sleeve, 7—spring, 8—insertion hole, 9—limiting post, 10—needle one, 11—needle two, 12—bending part, 13—protrusion, 14—spring hole, 15—connecting post, 16—pressing end, 17—base plate. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Example 1

[0019] A Kirschner wire assembly includes a needle body 1 and a protective head 2 for mounting at one end of the needle body 1. One end of the needle body 1 is a needle tip 3, and the other end is a needle tail 4. The needle tail 4 has a hook structure. The protective head 2 has a mounting groove 5 inside for mounting the hook structure. In the installed state, the hook structure is fixedly installed in the mounting groove 5. The needle body 1 is a Kirschner wire, with the needle tip 3 inserted into the skin and the needle tail 4 exposed outside the body. In this embodiment, the needle tail 4 is U-shaped, with the entire tail 4, except for the bent portion 12 which is hooked externally, located inside the protective head 2. The diameter of the needle body is 0.6 mm to 2.0 mm.

[0020] The protective head 2 includes an outer shell and an internal movable sleeve 6, as well as a spring 7. The spring 7 supports the movable sleeve 6 to move up and down. The outer shell is provided with a plug hole 8, and a limit post 9 is provided on the plug hole 8. The mounting groove 5 is provided on the movable sleeve 6. A hook structure passes through the plug hole 8 and is installed in the mounting groove 5, with the hook hooked on the limit post 9. The needle tail includes a needle 10 on the left and a needle 2 11 on the right. The needle 10 extends to the needle tip. The needle 10 and the needle 2 11 are connected by a bending part 12. The needle 10 and the needle 2 11 are arranged in parallel. In the installed state, the needle 10 and the needle 2 11 are located on both sides of the limit post 9, and the bending part 12 hooks on the outside of the limit post 9.

[0021] There are two insertion holes 8, which are symmetrically distributed on both sides of the movable sleeve 6. The insertion holes 8 are connected to the internal mounting groove 5. The needle tail end 4 installed in the mounting groove 5 is restricted between the bottom surface of the mounting groove 5 and the upper side of the insertion hole 8 under the action of the spring 7. When the movable sleeve 6 is pressed down, the needle tail end 4 is released from the restriction of the upper side of the insertion hole 8.

[0022] In this design, the bottom of the movable sleeve 6 is provided with a spring hole 14, and the spring 7 is installed in the spring hole 14. This design can reduce the size of the entire protective head 2 axially, while the spring hole 14 can also serve as a guide.

[0023] The movable sleeve 6 includes an upper pressing end 16, a bottom plate 17, and a connecting post 15 connecting the bottom plate 17 and the pressing end 16. The axial projection of the connecting post 15 falls within the axial projection of the bottom plate 17 and the pressing end 16. The upper end of the outer shell is provided with an extension opening 13, from which the pressing end 16 extends outward. Pressing the pressing end 16 allows for axial movement. After the external force is withdrawn, the spring 7 will return to its original position and drive the pressing end 16 back to its original position.

[0024] In this design, the plug hole 8 is keyway shaped, and the limiting post 9 is connected to the upper and lower sides of the plug hole 8.

[0025] When in use, the pressing part is in the pressing state, at which time the axial space of the mounting groove 5 is at its maximum. The Kirschner wire is inserted from one insertion hole 8 and extends out from the opposite insertion hole 8. Then the tail end 4 of the wire hooks onto the limiting post 9 of the opposite insertion hole 8. The first wire 10 and the second wire 11 are located in the mounting groove 5. Then the pressing part is released, and under the action of the spring 7, the base plate 17 pushes the first wire 10 and the second wire 11 to abut against the upper side of the insertion hole 8 to achieve fixation.

[0026] Example 2

[0027] The difference between this embodiment and embodiment 1 is that both the shell and the movable sleeve 6 are cylindrical in shape.

[0028] Example 3

[0029] The difference between this embodiment and embodiment 1 is that a limiting structure is provided on the inner side of the protrusion hole to allow the movable sleeve 6 to extend and detach.

Claims

1. A Kirschner wire assembly, characterized in that: It includes a needle body (1) and a protective head (2) for mounting on one end of the needle body (1). One end of the needle body (1) is the needle tip end (3) and the other end is the needle tail end (4). The needle tail end (4) has a hook structure. The protective head (2) has an installation groove (5) for mounting the hook structure inside. When installed, the hook structure is fixedly installed in the installation groove (5).

2. The Kirschner wire assembly according to claim 1, characterized in that: The protective head (2) includes an outer shell and an inner movable sleeve (6), and also includes a spring (7). The spring (7) supports the movable sleeve (6) to move up and down. The outer shell is provided with a plug hole (8), and a limit post (9) is provided on the plug hole (8). The mounting groove (5) is provided on the movable sleeve (6). The hook structure passes through the plug hole (8) and is installed in the mounting groove (5), and the hook is hooked on the limit post (9).

3. A Kirschner wire assembly according to claim 2, characterized in that: The needle tail includes a needle one (10) on the left and a needle two (11) on the right. The needle one (10) extends to the needle tip. The needle one (10) and the needle two (11) are connected by a bent part (12). The needle one (10) and the needle two (11) are arranged in parallel. In the installation state, the needle one (10) and the needle two (11) are located on both sides of the limiting post (9), and the bent part (12) is hooked on the outside of the limiting post (9).

4. A Kirschner wire assembly according to claim 2, characterized in that: There are two insertion holes (8) symmetrically distributed on both sides of the movable sleeve (6). The insertion holes (8) are connected to the internal mounting groove (5). The needle tail end (4) installed in the mounting groove (5) is restricted between the bottom surface of the mounting groove (5) and the upper side of the insertion hole (8) under the action of the spring (7). When the movable sleeve (6) is pressed down, the needle tail end (4) is released from the restriction of the upper side of the insertion hole (8).

5. A Kirschner wire assembly according to claim 2, characterized in that: The upper end of the outer shell is provided with an extension opening (13), and the pressing end (16) extends outward from the extension opening (13). Pressing the pressing end (16) allows for axial movement. After the external force is withdrawn, the spring (7) will restore and drive the pressing end (16) back to its original position.

6. A Kirschner wire assembly according to claim 1, 2, 3, 4, or 5, characterized in that: The bottom of the movable sleeve (6) is provided with a spring hole (14), and the spring (7) is installed in the spring hole (14).

7. A Kirschner wire assembly according to claim 1, 2, 3, 4, or 5, characterized in that: The movable sleeve (6) includes an upper pressing end (16), a bottom plate (17), and a connecting post (15) connecting the bottom plate (17) and the pressing end (16). The axial projection of the connecting post (15) falls within the axial projection of the bottom plate (17) and the pressing end (16).

8. A Kirschner wire assembly according to claim 2, characterized in that: The plug hole (8) is keyway shaped, and the limiting post (9) is connected to the upper and lower sides of the plug hole (8).

9. A Kirschner wire assembly according to claim 5, characterized in that: A limit structure is provided on the inside of the protruding hole.

10. A Kirschner wire assembly according to claim 1, characterized in that: The diameter of the needle body is 0.6mm to 2.0mm.

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