Broken nail extractor for orthopedics department

Abstract

The utility model relates to the technical field of medical auxiliary instruments and equipment, in particular to an orthopedic broken nail extractor which comprises a cylindrical body, the cylindrical body is divided into two sections, one section is an installation portion, and the other section is a locking portion. The mounting part is a solid rod, and an assembling groove is formed in the upper end of the mounting part. The locking part is of a hollow structure; a circle of sawteeth are arranged on the end opening part of the locking part, the caliber of the hollow inside the locking part is gradually reduced from the end opening part to the inside, the internal space of the locking part is in a trapezoidal cylinder shape, and internal threads are arranged on the inner wall of the locking part from the end opening part to the inside; the utility model discloses a universal taking-out drill bit applied to a broken nail taking-out device, which can improve the efficiency of taking out broken nails, can be matched with broken nails in different states and models at the same time, and can reduce secondary damage.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary equipment, in particular to an orthopedic broken nail extractor. Background Art

[0002] When a fracture occurs, doctors use medical devices such as metal screws, steel plates, intramedullary nails, wires or bone plates to directly connect and fix the broken bones at the fracture site. This diagnosis and treatment method is called fracture internal fixation. Fracture internal fixation is an important fracture treatment method, which can effectively maintain the stability of the fracture ends and promote fracture healing.

[0003] After the patient undergoes fracture internal fixation, after 1-2 years of postoperative growth, the fractured bone blocks can heal again. When the fractured bone blocks heal, some patients will have adverse conditions such as rejection reactions, and generally a nail removal operation will be performed. However, due to the long-term healing growth, the condition of the screws is relatively complex, and some may have become stripped or even broken. If this happens, it is difficult to remove the screws. The existing removal method requires first using a tungsten carbide drill bit to grind off the stripped nut, then removing the steel plate. After the steel plate is removed, the screw position is reamed. After the broken nail becomes loose, it is removed. The removal process is likely to cause secondary injuries to the patient. The whole removal process is complex, difficult and time-consuming.

[0004] Therefore, those skilled in the art are committed to developing an orthopedic broken nail extractor that can improve the efficiency of broken nail removal, is simple to operate, and can reduce secondary trauma. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an orthopedic broken nail extractor, which is simple to operate, can effectively improve the broken nail removal rate, and can reduce secondary trauma.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] An orthopedic broken nail extractor includes a cylindrical body, which is divided into two sections. One section is an installation part, and the other section is a locking part;

[0008] The installation part is a solid rod, and an assembly groove is opened at its upper end;

[0009] The locking part is a hollow structure; a circle of sawteeth is provided at its port part. The hollow diameter inside the locking part gradually decreases from the port part inwards. The internal space of the locking part is a trapezoidal cylinder, and an internal thread is provided on the inner wall of the locking part from the port part inwards;

[0010] Discharge holes are equally spaced on the circumference of the port part, and the discharge holes are opened at a position close to the sawteeth.

[0011] The beneficial effects of adopting the above solution are as follows: By connecting the installation part with medical device tools such as a T-shaped wrench or a T-shaped handle, the lower end meshes with the outer wall of the broken nail through the locking part. Relying on the complete internal thread on the inner wall of the lower end and the internal thread left on the outer wall of the broken nail, and the diameter of the internal thread continuously shrinking, the locking of the broken nail is gradually achieved. After it is locked, the broken nail can be quickly pulled out at one time. At the same time, the port part of the locking part is provided with helical teeth, which can clean the tissues around the broken nail, avoiding the reaming process and minimizing secondary damage.

[0012] On the basis of the above technical solution, the present utility model can also be improved as follows.

[0013] Further, the discharge hole is a strip-shaped hole opened along the axial direction of the locking part.

[0014] The beneficial effects of adopting the above further solution are: Since the internal space of the locking part gradually shrinks and its lower end does not completely cooperate with the outer surface of the broken nail for locking, it is necessary to set a strip-shaped hole in the axial direction to facilitate the discharge of blood or other tissues inside the locking part and avoid affecting the cooperation between the locking part and the broken nail.

[0015] Further, 2n discharge holes are opened.

[0016] The beneficial effects of adopting the above further solution are: It can ensure the uniformity of discharging blood or other tissues during the rotation of the broken nail extractor.

[0017] Further, the assembly groove is opened at the end close to the installation part and is opened in a circle along the outer circumference of the installation part; the installation part is provided with a notch from the end face downward, and the notch penetrates the area of the assembly groove to form an end face downward; the end face is located below the assembly groove.

[0018] The beneficial effects of adopting the above further solution are: In order to facilitate the quick assembly of the broken nail extractor onto a T-shaped wrench or a T-shaped handle. During specific use, an installation hole is opened inside the T-shaped wrench or the T-shaped handle, and a convex part matching the assembly groove is provided in the installation hole. When the assembly groove of the broken nail extractor cooperates with the convex part inside the T-shaped wrench or the T-shaped handle, a screw is screwed in from the outside of the T-shaped wrench or the T-shaped handle and abuts against the notch surface, thereby realizing the fixed combination of the broken nail extractor and the T-shaped wrench or the T-shaped handle.

[0019] Further, the outer diameter of the locking part is greater than the outer diameter of the installation part.

[0020] The beneficial effects of adopting the above further solution are: Since the inside of the locking part is hollow and the installation part is solid, the outer diameter of the locking part is greater than the outer diameter of the installation part, which is convenient for the one-time forming manufacturing of the product by 3D printing and can also improve the overall structural strength of the product.

[0021] Further, the saw teeth are unidirectional helical teeth, and the shape of the helical teeth is an inclined triangular shape.

[0022] The beneficial effect of adopting the above further solution is: to ensure that the extractor can only rotate in one direction, which can reduce secondary injuries to a certain extent. Description of the Drawings

[0023] Figure 1 It is a schematic three-dimensional structure diagram of the orthopedic broken nail extractor of the present invention;

[0024] Figure 2 is Figure 1 the plan view of;

[0025] Figure 3 is Figure 2 the schematic cross-sectional structure diagram in the A-A direction in;

[0026] Figure 4 is Figure 1 the enlarged structure diagram at B in;

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 10 - mounting part; 11 - assembly groove; 12 - end face;

[0029] 20 - locking part; 21 - saw teeth; 22 - discharge hole; 23 - internal thread. Detailed Embodiments

[0030] The principles and features of the present invention will be described below with reference to the drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, an orthopedic broken nail extractor includes a cylindrical body, which is divided into two sections. One section is the installation part 10, and the other section is the locking part 20;

[0036] The installation part 10 is a solid rod, and an assembly groove 11 is opened at its upper end.

[0037] The locking part 20 is a hollow structure; a circle of sawteeth 21 is provided at its port part. The inner diameter of the hollow part inside the locking part 20 gradually decreases from the port part inward. The internal space of the locking part 20 is a trapezoidal cylinder, and an internal thread is provided on the inner wall of the locking part 20 from the port part inward;

[0038] Discharge holes 22 are equally spaced on the circumference of the port part, and the discharge holes 22 are opened at a position close to the sawteeth 21.

[0039] In the present utility model, the broken nail extractor is connected to a tungsten carbide drill, a T-shaped wrench or a T-shaped handle through the installation part 10. The sawteeth at the end of the locking part 20 are used to clean the tissue around the broken nail. The cleaned surrounding tissue is discharged through the discharge holes, ensuring that the internal thread inside the locking part can be rotated downward to continue locking with the external thread on the broken nail. After the locking part is completely locked with the broken nail, the broken nail can be pulled out. The operation of removing the broken nail is simple, the nail removal efficiency is high, and secondary damage can be minimized as much as possible. In addition, since the inside of the locking part has a full-wall internal thread and the inner hole diameter gradually decreases, it can adapt to various types of screws, making its versatility better. At the same time, the full-wall internal thread can also better cooperate with the external thread of the broken nail for locking, and the locking effect is better. The broken nail extractor involved in the present utility model is actually a universal extraction tool.

[0040] In some embodiments, the discharge holes 22 are strip-shaped holes opened along the axial direction of the locking portion, and 2n discharge holes 22 are provided. Specifically, two, four or six discharge holes 22 can be provided, and the optimal embodiment is to provide four discharge holes 22. The four discharge holes arranged at equal intervals along the axial direction can, on the one hand, expand the height and area for discharging blood or other tissues; on the other hand, it can ensure that in the rotation process, each area on the outer periphery of the locking portion can discharge blood or other tissues, ensuring the internal pressure of the locking portion, and being more conducive to the gradual discharge of the blood or other tissues after cleaning from the inside of the locking portion 20, providing environmental conditions for the locking between the locking portion 20 and the inner wall of the broken nail.

[0041] In some embodiments, in order to facilitate the assembly of the broken nail extractor involved in the present invention to other auxiliary tools, such as a T-shaped wrench, a T-shaped handle or a tungsten steel drill, the assembly groove 11 is opened near the end of the installation portion 10 and is opened in a circle along the outer periphery of the installation portion 10; a notch is opened downward from the end face of the installation portion 10, the notch penetrates through the area of the assembly groove 11, and a end face 12 is formed downward, and a notch surface 13 is formed on the side; the end face 12 is located below the assembly groove 11. Specifically, the connection end of the T-shaped wrench, the T-shaped handle or the tungsten steel drill is provided with an installation hole, and a convex portion matching the assembly groove 11 is provided in the installation hole. Since a notch is provided on the installation portion 10, the notch is a relief notch. After the installation portion 10 is inserted into the connection end of the T-shaped wrench, the T-shaped handle or the tungsten steel drill, it is positioned through the end face 12, and then the assembly groove 11 is matched with the convex portion inside the T-shaped wrench, the T-shaped handle or the tungsten steel drill, and then a screw is screwed in from the side wall of the T-shaped wrench, the T-shaped handle or the tungsten steel drill, so that the screw abuts against the notch surface 13, thereby assembling the broken nail extractor to other auxiliary tools. Since the specific fixed connection method is the prior art, this embodiment exemplifies one of the connection methods in words. There are other existing connection methods that can achieve fixed connection, which also belong to the protection scope of the present invention.

[0042] In some embodiments, the outer diameter of the locking portion 20 is larger than the outer diameter of the installation portion 10. On the one hand, it can ensure the hardness and strength of the overall structure, and on the other hand, it is convenient for 3D printing to produce product entities in one step.

[0043] In some embodiments, the serrations 21 are one-way inclined teeth 23, and the shape of the inclined teeth 23 is an inclined triangular shape. The inclined teeth 23 are in one direction, which can ensure that it cleans relevant tissues during the downward movement and locking with the broken nail, and will not damage tissues during the reverse rotation, thereby further avoiding secondary injuries.

[0044] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An orthopedic broken nail extractor, comprising a cylindrical body, characterized in that: The cylindrical body is divided into two sections, one is the installation part (10), and the other is the locking part (20); The installation part (10) is a solid rod, and an assembly groove (11) is opened at its upper end; The locking part (20) is a hollow structure; a circle of sawteeth (21) is provided at its port part. The inner diameter of the hollow part inside the locking part (20) gradually decreases from the port part inwards. The inner space of the locking part (20) is trapezoidal cylindrical, and an internal thread is provided on the inner wall of the locking part (20) from the port part inwards; Discharge holes (22) are equally spacedly opened on the circumference of the port part, and the discharge holes (22) are opened at positions close to the sawteeth (21).

2. The orthopedic broken nail extractor according to claim 1, characterized in that: The discharge holes (22) are strip-shaped holes opened along the axial direction of the locking part.

3. The orthopedic broken nail extractor according to claim 1 or 2, characterized in that: 2n discharge holes (22) are opened.

4. The orthopedic broken nail extractor according to claim 1, characterized in that: The assembly groove (11) is opened at the end of the installation part (10) close to it and is opened in a circle along the outer circumference of the installation part (10); a notch is opened downward from the end surface of the installation part (10), and the notch penetrates through the area of the assembly groove (11) and forms an end surface (12) downward; the end surface (12) is located below the assembly groove (11).

5. The orthopedic broken nail extractor according to claim 1, characterized in that: The outer diameter of the locking part (20) is larger than the outer diameter of the installation part (10).

6. The orthopedic broken nail extractor according to claim 1, wherein: The sawteeth (21) are one-way inclined teeth (23), and the shape of the inclined teeth (23) is an inclined triangular shape.

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