Novel minimally invasive femoral nail

Abstract

The utility model discloses a novel minimally invasive femoral nail which comprises a near-end part, a far-end part, a tail cap and a locking screw. The near-end part comprises an upper nail tube, an internal thread arranged on the inner wall of the upper nail tube, a conical surface arranged at the top end of the upper nail tube, a fillet arranged at the edge of the top end of the conical surface and a threaded hole formed in the top of the upper nail tube; the far-end part comprises a lower nail tube arranged at the bottom of the upper nail tube and a static threaded lock hole formed in the lower nail tube, the tail cap is connected into the upper nail tube in a threaded mode, a round hole is formed in the tail cap, and the locking screw is connected into the threaded hole of the upper nail tube in a threaded mode and inserted into the round hole in a penetrating mode. By arranging the near-end part and the locking screw, under the condition that the use of the femoral nail is not influenced, the tail cap can be reinforced, the problem that the tail cap is loosened after being used for a long time is solved, and meanwhile, the femoral nail is convenient and rapid to install and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of femoral nails, in particular to a novel minimally invasive femoral nail. Background Art

[0002] The femoral nail, also known as the metal femoral neck fixation nail, is a commonly used medical device in orthopedic surgeries, mainly used for treating fractures or joint injuries. The main function of the femoral nail is to stabilize the fracture site and promote fracture healing. By passing through the fracture ends or the joint surface, the bone structure is reconnected to prevent further displacement or instability. It provides stability and support, helping the bone to restore its original structure and function during the healing process. To lock and stabilize the femoral nail, a tail cap is installed. The tail cap prevents the femoral nail from withdrawing or shifting, improving stability. However, the existing tail cap is only fixed on the femoral nail by means of threads, and natural loosening is likely to occur after long-term use, and the loosening will cause certain harm to the user. For this reason, we propose a novel minimally invasive femoral nail. Content of the Utility Model

[0003] Therefore, the purpose of the utility model is to provide a novel minimally invasive femoral nail, which realizes the effect of reinforcing the tail cap without affecting the use of the femoral nail, avoids the problem of loosening of the tail cap after long-term use, and is convenient for quick installation.

[0004] To solve the above technical problems, according to one aspect of the utility model, the following technical solutions are provided:

[0005] A novel minimally invasive femoral nail, comprising:

[0006] A proximal part, including a set upper nail tube, an internal thread provided on the inner wall of the upper nail tube, a conical surface provided at the top end of the upper nail tube, a fillet provided at the edge of the top end of the conical surface, and a threaded hole provided at the top of the upper nail tube;

[0007] A distal part, including a lower nail tube provided at the bottom of the upper nail tube and a static thread locking hole provided on the lower nail tube;

[0008] A tail cap, threadedly connected inside the upper nail tube, and a round hole is provided on the tail cap;

[0009] A locking screw, threadedly connected in the threaded hole of the upper nail tube and inserted through the round hole.

[0010] As a preferred scheme of the novel minimally invasive femoral nail described in the utility model, wherein, the proximal part further includes an inclined hole provided on the upper nail tube for installing a screw and a positioning groove provided at the top of the upper nail tube.

[0011] As a preferred embodiment of the novel minimally invasive femoral nail of the present utility model, the distal part further includes a dynamic locking hole formed in the lower nail tube for installing screws.

[0012] As a preferred embodiment of the novel minimally invasive femoral nail of the present utility model, the lower nail tube and the upper nail tube are of an integral structure, and both the lower nail tube and the upper nail tube are of a hollow structure.

[0013] As a preferred embodiment of the novel minimally invasive femoral nail of the present utility model, the static threaded locking hole is a through hole with internal threads on the inner wall.

[0014] As a preferred embodiment of the novel minimally invasive femoral nail of the present utility model, a plurality of grooves are provided on the outer side of the insertion end of the lower nail tube, and the plurality of grooves are arranged in a circular pattern.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing the proximal part and the locking screw, the effect of reinforcing the tail cap can be achieved without affecting the use of the femoral nail, avoiding the problem of loosening of the tail cap after long-term use, and at the same time facilitating quick installation for use. During use, the user can align the tail cap with the top of the upper nail tube. Since the rounded corner and the conical surface have a guiding function, they can guide the tail cap to quickly dock with the upper nail tube for installation, saving time and effort. Then, the tail cap can be threadedly connected to the upper nail tube. After connection, the round hole of the tail cap will be directly opposite to the threaded hole. Subsequently, the locking screw is aligned with the threaded hole and rotated for connection. The connected locking screw will penetrate through the round hole of the tail cap, thus locking the tail cap to prevent it from rotating and loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0017] Figure 1 is a three-dimensional structure diagram of a novel minimally invasive femoral nail of the present utility model;

[0018] Figure 2 is a novel minimally invasive femoral nail of the present utility model Figure 1 in a three-dimensional structure diagram of the proximal part;

[0019] Figure 3 is a novel minimally invasive femoral nail of the present utility model Figure 1 in a three-dimensional structure diagram of the tail cap.

[0020] In the figure: 100, proximal part; 101, upper nail tube; 102, inclined hole; 103, positioning groove; 104, internal thread; 105, conical surface; 106, fillet; 107, threaded hole;

[0021] 200, distal part; 201, lower nail tube; 202, static thread lock hole; 203, dynamic lock hole; 204, groove;

[0022] 300, tail cap; 301, round hole;

[0023] 400, locking screw. Specific implementation manner

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the specific implementation manner of the present utility model in detail with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementation manners disclosed below.

[0026] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When detailing the implementation manner of the present utility model, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-half scale, and the schematic diagrams are only examples, which should not limit the protection scope of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0027] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following will further describe the implementation manner of the present utility model in detail with reference to the accompanying drawings.

[0028] The present utility model provides a novel minimally invasive femoral nail. By setting the proximal part and the locking screw, the effect of reinforcing the tail cap can be achieved without affecting the use of the femoral nail, avoiding the problem of loosening of the tail cap after long-term use, and at the same time facilitating quick installation.

[0029] Figures 1-3 Shown is a schematic diagram of the overall structure of an embodiment of a novel minimally invasive femoral nail of the present utility model. Please refer to Figures 1-3 , The main body part of a novel minimally invasive femoral nail in this embodiment includes: proximal part 100, distal part 200, tail cap 300 and locking screw 400.

[0030] Specifically, the proximal part 100 includes a set upper nail tube 101, an internal thread 104 provided on the inner wall of the upper nail tube 101, a tapered surface 105 provided at the top end of the upper nail tube 101, a rounded corner 106 provided at the top edge of the tapered surface 105, and a threaded hole 107 opened at the top of the upper nail tube 101. The proximal part 100 further includes an inclined hole 102 opened on the upper nail tube 101 for installing a screw and a positioning groove 103 opened at the top of the upper nail tube 101. During use, the user can align the tail cap 300 with the top of the upper nail tube 101. Due to the guiding functions of the rounded corner 106 and the tapered surface 105, the tail cap 300 can be guided to quickly dock with the upper nail tube 101 for installation, saving time and effort. And through the inclined hole 102, the fixing screw can pass through the upper nail tube 101 to fix the proximal part 100. The positioning groove 103 plays a positioning role and can be connected to an external auxiliary device.

[0031] Specifically, the distal part 200 includes a lower nail tube 201 provided at the bottom of the upper nail tube 101 and a static threaded locking hole 202 provided on the lower nail tube 201. The static threaded locking hole 202 is a through hole with internal threads on the inner wall. The distal part 200 further includes a dynamic locking hole 203 opened on the lower nail tube 201 for installing a screw. During use, the static threaded locking hole 202 can be threadedly connected with the fixing screw to fix the distal part 200. The dynamic locking hole 203 can be penetrated by the fixing screw to fix the distal part 200. At the same time, the fixing screw in the dynamic locking hole 203 mainly bears the lateral torsional force, ensuring the stability after fracture reduction and helping to prevent the fracture fragment from sinking or shifting.

[0032] It should be noted that the lower nail tube 201 and the upper nail tube 101 are of an integral structure, and both the lower nail tube 201 and the upper nail tube 101 are hollow structures.

[0033] Furthermore, several grooves 204 are provided on the outer side of the insertion end of the lower nail tube 201. The several grooves 204 are arranged in a circular pattern. During use, the several grooves 204 facilitate the insertion of the lower nail tube 201 and the discharge of marrow fluid.

[0034] Specifically, the tail cap 300 is threadedly connected inside the upper nail tube 101, and a round hole 301 is opened on the tail cap 300. During use, the round hole 301 of the tail cap 300 can be directly opposite to the threaded hole 107. After alignment, the locking screw 400 can be aligned with the threaded hole 107 and rotationally connected. After connection, the locking screw 400 will penetrate through the round hole 301 of the tail cap 300, and then the tail cap 300 can be locked to prevent the tail cap 300 from rotating and loosening.

[0035] Specifically, the locking screw 400 is threadedly connected in the threaded hole 107 of the upper nail tube 101 and penetrates through the round hole 301. During use, the locking screw 400 can fix the tail cap 300 on the upper nail tube 101 to prevent the tail cap 300 from loosening.

[0036] Combined with Figures 1-3 , for a novel minimally invasive femoral nail of this embodiment, during specific use, the user can align the tail cap 300 with the top of the upper nail tube 101. Since the rounded corner 106 and the tapered surface 105 have a guiding function, they can guide the tail cap 300 to quickly dock with the upper nail tube 101 for installation, which is time-saving and labor-saving. Then, the tail cap 300 can be threadedly connected to the upper nail tube 101. After connection, the round hole 301 of the tail cap 300 will be directly opposite the threaded hole 107. Subsequently, the locking screw 400 is aligned with the threaded hole 107 and rotated for connection. After connection, the locking screw 400 will penetrate through the round hole 301 of the tail cap 300, and the tail cap 300 can be locked to prevent the tail cap 300 from rotating and loosening.

[0037] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and its components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The exhaustive description of these combinations is omitted in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A novel minimally invasive femoral nail, characterized in that: include: The proximal portion (100) comprises an upper nail tube (101), an internal thread (104) provided on the inner wall of the upper nail tube (101), a conical surface (105) provided at the top end of the upper nail tube (101), a fillet (106) provided at the top edge of the conical surface (105), and a threaded hole (107) provided at the top of the upper nail tube (101); The distal end portion (200) comprises a lower nail tube (201) arranged at the bottom of the upper nail tube (101) and a static thread lock hole (202) arranged on the lower nail tube (201); A tail cap (300) is threadedly connected in the upper nail tube (101), and a round hole (301) is formed on the tail cap (300); A locking screw (400) is threadedly connected in the threaded hole (107) of the upper nail tube (101) and inserted into the circular hole (301).

2. A novel minimally invasive femoral nail according to claim 1, characterized in that: The proximal portion (100) further comprises an oblique hole (102) provided on the upper nail tube (101) for installing a screw and a positioning groove (103) provided on the top of the upper nail tube (101).

3. A novel minimally invasive femoral nail according to claim 2, characterized in that: The distal end portion (200) further comprises a dynamic locking hole (203) provided on the lower nail tube (201) for installing a screw.

4. The novel minimally invasive femoral nail according to claim 3, characterized in that: The lower nail tube (201) and the upper nail tube (101) are an integral structure, and the lower nail tube (201) and the upper nail tube (101) are hollow structures.

5. The novel minimally invasive femoral nail according to claim 4, characterized in that: The static thread lock hole (202) is a through hole with a threaded inner wall.

6. The novel minimally invasive femoral nail according to claim 5, characterized in that: A plurality of grooves (204) are arranged on the outer side of the insertion end of the lower nail tube (201), and the plurality of grooves (204) are arranged in a circular pattern.

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