KR102615795B1 - Nail - Google Patents

Abstract

A nail capable of improving the clamping force of a nail inserted into a human femur is provided.
A nail according to an embodiment of the present invention includes a nail body inserted into the femur in a vertical direction, a first screw passing through the nail body and obliquely inserted into the femur, and spaced apart from the first screw, the nail body It is characterized in that it includes a second screw that passes through and is obliquely inserted into the femur.

Description

Nail{NAIL}

The present invention relates to a nail (metal nail in the bone marrow), and more specifically to a nail inserted into the human femur.

The femur, the largest joint in the human body, is a joint that connects the pelvic bone and the thigh bone and plays an important role in lower body movement.

The above-described femur includes a femoral head connected to the acetabulum of the pelvis, a femoral neck extending downward from the femoral head, a greater femoral condyle protruding from the femoral neck to have an approximately Y shape at a distance from the femoral head, and a femur. It consists of the lesser trochanter of the femur, which protrudes in the direction opposite to the greater trochanter, and the femur, which extends long in the downward direction.

When the femur is fractured, a nail (or implant) is performed. The nail is inserted into the nail body from the top of the greater trochanter toward the femur, and the nail is inserted obliquely into the femoral head from the lower side of the greater trochanter of the femur. It includes an upper screw (lag screw) that secures the upper part and a lower screw (anti-rotation screw) that is driven horizontally across the thigh and secures the lower part of the nail body. Additionally, a nail insertion tool may be used to insert such nails.

Meanwhile, since the shape and size of the femur of most people are almost similar, nails with fixed shapes and lengths are marketed and performed.

However, the protrusion length of the femoral head is different, so the distance between the greater trochanter of the femur and the femoral head is different, or the protrusion angle of the femoral head is different, so the angle of the upper screw of the nail, which is a commonly used industrial product, is different, making the procedure impossible. there is.

Registered Patent Publication No. 10-1672413

The purpose of the present invention is to provide a nail that can improve the fastening force of the nail inserted into the human femur.

A nail according to an embodiment of the present invention is a nail inserted into a human femur, comprising a nail body inserted in a vertical direction into the femur, and a first nail body passing through the nail body and obliquely inserted into the femur. It is characterized in that it includes a screw and a second screw that is spaced apart from the first screw and is obliquely inserted into the femur through the nail body.

Preferably, the nail body has a main channel formed in a vertical direction inside the nail body, a first insertion hole formed through the main channel to be inclined inside the nail body, and the nail body to be inclined inside the nail body. It is formed through the main channel and includes a second insertion hole vertically spaced apart from the first insertion hole, wherein the first screw is inserted into the first insertion hole and the second screw is inserted into the second insertion hole. Characterized in that a screw is inserted.

Preferably, the first screw is formed at one end of the first screw and has a threaded end inserted into the upper part of the femur and an internal thread formed on the inside of the first screw near the other end of the first screw. It is characterized by including.

Preferably, the first screw further includes a groove formed at the other end of the first screw, and a protrusion of a fastening mechanism that rotates the first screw is coupled to the groove.

Preferably, the second screw is formed at one end of the second screw, has a first thread inserted into the upper part of the femur, is connected to the first thread, and has a diameter larger than the first thread. A second thread is formed and fastened to the nail body, a third thread is connected to the second thread and has a diameter larger than the second thread, and is formed between the second thread and the third thread, It is characterized by including a step portion fixed to the second insertion hole.

Preferably, the pitch of the screw threads formed on the outer peripheral surface of the first thread and the pitch of the screw threads formed on the outer peripheral surface of the third thread are the same, and the pitch of the screw threads formed on the outer peripheral surface of the second thread is equal to the pitch of the screw threads formed on the outer peripheral surface of the second thread. It is characterized in that it is narrower than the pitch of the screw thread formed on the outer peripheral surface of the thread and the pitch of the screw thread formed on the outer peripheral surface of the third thread.

Preferably, the nail body further includes a screw insertion portion formed in the vertical direction inside the proximal end of the nail body, and a third screw that restrains the movement of the first screw is inserted into the screw insertion portion. It is characterized by

Preferably, the nail body further includes a third insertion hole formed inside the nail body through the main channel in a horizontal direction perpendicular to the vertical direction, and the third insertion hole is formed in a circle of the nail body. It is formed near the upper end, and at least one fourth screw is inserted into the third insertion hole in the horizontal direction so as to penetrate the nail body and the femur.

Preferably, the nail body further includes a cap portion coupled to the proximal end of the nail body.

Preferably, the third thread is inserted into the lower part of the greater trochanter of the femur.

Preferably, the second screw is located lower than the first screw based on the femoral head of the femur.

According to the nail of the present invention, the first screw and the second screw are configured to be inserted into the femur so as to be spaced apart, and the second screw is configured with a three-stage thread, thereby improving the fastening force of the nail to the femur.

1 is a diagram showing the overall shape of a nail according to an embodiment of the present invention.
Figure 2 is a diagram showing a nail inserted into the femur.
Figure 3 is an exploded perspective view of a nail according to an embodiment of the present invention.
Figure 4 is a diagram showing the cross-sectional shape of a nail according to an embodiment of the present invention.
Figure 5 is a detailed view of the second screw provided in the nail of the present invention.
Figure 6 is a diagram showing the overall shape of a nail insertion device according to an embodiment of the present invention.
Figure 7 is a diagram showing the cross-sectional shape of a nail insertion device according to an embodiment of the present invention.
Figure 8 is a diagram showing an exploded perspective view of a nail insertion device according to an embodiment of the present invention.
Figure 9 is a diagram showing the sleeve orientation angle adjustment unit provided in the nail insertion device of the present invention.
Figures 10 and 11 are diagrams showing a state in which the orientation angle of the sleeve fixing hole is adjusted according to the rotation of the shaft provided in the sleeve orientation angle adjusting unit of the present invention.
Figure 12 is a diagram showing the operation of the angle adjustment guide portion and the rotation prevention portion provided in the sleeve orientation angle adjustment portion of the present invention.
Figure 13 is a diagram showing the operation of the sleeve locking unit and sleeve locking nut provided in the sleeve orientation angle adjusting unit of the present invention.
Figure 14 is a perspective view showing the sleeve locking nut near one end of the outer peripheral surface of the handle body provided in the nail insertion device of the present invention.
Figure 15 is a diagram showing a mechanism for fixing the sleeve to the nail insertion device of the present invention.
Figure 16 is a diagram showing the process of inserting a nail body into the femur using a nail insertion device.
Figure 17 is a diagram showing the process of inserting the first screw into the nail body.
Figure 18 is a diagram showing the process of inserting the second screw into the nail body.
Figure 19 is a diagram showing the process of inserting the third screw into the nail body.
Figure 20 is a diagram showing the process of inserting the fourth screw into the nail body.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or restricted thereto, and of course, it can be modified and implemented in various ways by those skilled in the art.

Figure 1 is a diagram showing the overall shape of the nail 100 according to an embodiment of the present invention, Figure 2 is a diagram showing the nail 100 inserted into the femur 1, and Figure 3 is an embodiment of the present invention. This is an exploded perspective view of the nail 100 according to an example, and Figure 4 is a diagram showing the cross-sectional shape of the nail 100 according to an embodiment of the present invention. Here, FIGS. 1(a), 3(a), and 4(a) show a case where the orientation angle between the nail body 110 and the first screw 120 and the second screw 130 is α1, 1(b), 3(b), and 4(b) show a case where the orientation angle between the nail body 110 and the first screw 120 and the second screw 130 is α2.

In the present invention, the values of the orientation angle α1 and the orientation angle α2 are different from each other, and the orientation angle α1 may be 125° and the orientation angle α2 may be 130°, but are not limited to this and a preferred angle is selected according to the shape of the human femur. It can be.

Referring to FIGS. 1 and 2, a nail 100 according to an embodiment of the present invention can be inserted into a human femur 1.

The femur (1) includes a femoral head (2) coupled to the acetabulum of the pelvis, a femoral neck (3) extending downward from the femoral head (2), and a gap between the femoral head (2) and the femoral neck (3). The greater trochanter of the femur (4) is protruded and formed to have an approximately Y shape, the lesser trochanter of the femur (5) protrudes in a direction opposite to the greater trochanter of the femur (4), and the lesser trochanter of the femur (5) is elongated in the vertical direction from the lesser trochanter of the femur (5). It consists of an extended thigh portion (6).

Meanwhile, the nail 100 includes a nail body 110, a first screw 120, a second screw 130, a third screw 140, a fourth screw 150, and a cap portion 160.

The nail body 110 may be inserted into the femur 1 in a vertical direction. More specifically, the nail body 110 may be inserted in a vertical direction from the upper part of the greater trochanter of the femur (4) toward the thigh (6).

The first screw 120 may pass through the nail body 110 and be obliquely inserted into the femur 1 in the first or second direction. More specifically, the first screw 120 is inserted from the lower part of the greater trochanter of the femur 4, passes through the nail body 110, and then is inclined toward the inside of the upper part of the femur (femoral neck 3 and femoral head 2). It can be inserted to fix the upper part of the nail body 110. In addition, as shown in FIGS. 1(a), 3(a), and 4(a), when the orientation angle between the nail body 110 and the first screw 120 is α1, the first screw 120 is aligned with the nail body 110. It may pass through the main body 110 and be obliquely inserted into the femur 1 in a first direction (the X1 axis direction among the first directions), as shown in FIGS. Similarly, when the orientation angle between the nail body 110 and the first screw 120 is α2, the first screw 120 passes through the nail body 110 and is inserted into the femur 1 in a direction different from the first direction. It can be inserted obliquely in two directions (the X1 axis direction among the second directions).

The second screw 120 is spaced apart from the first screw 120 and may pass through the nail body 110 and be obliquely inserted into the femur 1 in the first or second direction.

At this time, the second screw 130 may be positioned below the first screw 120 with respect to the femoral head 2 of the femur 1.

More specifically, it is inserted from the lower part of the greater trochanter of the femur (4) so as to be spaced apart from the first screw (120), passes through the nail body (110), and then is obliquely inserted into the femoral neck (3) and the femoral head (2). and rotation of the nail body 110 can be prevented. In addition, as shown in FIGS. 1(a), 3(a), and 4(a), when the orientation angle between the nail body 110 and the second screw 130 is α1, the second screw 130 is aligned with the nail body 110. It may pass through the main body 110 and be obliquely inserted into the femur 1 in a first direction (the X2 axis direction among the first directions), as shown in FIGS. Likewise, when the orientation angle between the nail body 110 and the second screw 130 is α2, the second screw 130 passes through the nail body 110 and is inserted into the femur 1 in a direction different from the first direction. It can be inserted obliquely in two directions (the X2 axis direction among the second directions).

1 to 4, the nail body 110 includes a main channel 111, a first insertion hole 112, and a second insertion hole 113.

A nail insertion device (200, see FIG. 6) that inserts the nail body 110 into the femur 1 may be coupled to the main channel 111, and the main channel 111 is vertical inside the nail body 110. It can be formed in any direction.

The first insertion hole 112 may be formed through the main channel 111 to be inclined in the first or second direction inside the nail body 110, and the first screw may be installed in the first insertion hole 112. (120) can be inserted.

The second insertion hole 113 is formed through the main channel 111 to be inclined in the first or second direction inside the nail body 110, and may be spaced apart from the first insertion hole 112 in the vertical direction. And the second screw 130 can be inserted into the second insertion hole 113.

The first screw 120 is formed at one end of the first screw 120 and has a threaded end 122 inserted into the upper part of the femur 1 (femoral head 2), and a It includes an internal thread 124 formed on the inside of the first screw 120 near the other end and a groove 126 formed on the other end of the first screw 120.

A protrusion (Xa) of a fastening mechanism (X, see FIG. 17) that rotates the first screw 120 may be coupled to the groove 126.

Figure 5 is a detailed view showing the second screw 130 provided in the nail 100 of the present invention.

1 to 5, the second screw 130 includes a first thread 132, a second thread 134, a third thread 136, and a step portion 138.

The first thread 132 is formed on one end of the second screw 130 and can be inserted into the upper part of the femur 1 (femoral head 2 and femoral neck 3).

The second thread 134 is connected to the first thread 132, has a larger diameter than the first thread 132, and may be fastened to the nail body 110. At this time, a screw thread may be formed on the inner peripheral surface of the second insertion hole 113 into which the second screw 130 is inserted to correspond to the screw thread formed on the outer peripheral surface of the second thread 134.

The third thread 136 is connected to the second thread 134 and may have a larger diameter than the second thread 134. At this time, the third thread 136 may be inserted into the lower part of the greater trochanter of the femur (4).

The step portion 138 is formed between the second thread 134 and the third thread 136 and may be fixed to the second insertion hole 113 (see FIGS. 2 and 18). In this way, the step portion 138 is provided between the second thread 134 and the third thread 136, and the step portion 138 is fixed to the second insertion hole 113, thereby loosening the second screw 130. can be prevented.

The diameters of the first thread 132, the second thread 134, and the third thread 136 may mean the outer diameters of the first thread 132, the second thread 134, and the third thread 136, respectively. there is.

Referring again to FIG. 5 , the relationship of diameter r3 of the third thread 136 > diameter r2 of the second thread 134 > diameter r1 of the first thread 132 is established.

Referring to enlarged portions A, B, and C of FIG. 5, the pitch (d1) of the screw thread formed on the outer peripheral surface of the first thread 132 and the pitch (d3) of the screw thread formed on the outer peripheral surface of the third thread 136 may be the same as each other. At this time, the pitch refers to the distance between screw threads in a male screw.

In addition, the pitch d2 of the screw thread formed on the outer peripheral surface of the second thread 134 is the pitch of the screw thread formed on the outer peripheral surface of the first thread 132 (d1) and the pitch of the screw thread formed on the outer peripheral surface of the third thread 136. (d3) may be narrower.

As described above, according to the nail 100 of the present invention, the first screw 120 and the second screw 130 are configured to be inserted into the femur 1 so as to be spaced apart, and the second screws 130 have diameters similar to each other. Differently, the pitch of the thread formed on the outer peripheral surface of the second thread 134 is composed of a three-stage thread that is narrower than that of the first thread 132 and the third thread 136, thereby increasing the fastening force of the nail 100 to the femur 1. It can be improved.

1 to 4, the nail body 110 further includes a screw insertion portion 114 formed in a vertical direction inside the proximal end of the nail body 110. At this time, the proximal end of the nail body 110 may be the end of the main channel 111.

At this time, a third screw 140 that restrains the movement of the first screw 120 in the first or second direction may be inserted into the screw insertion portion 114, and the third screw 140 may be inserted into the screw insertion portion 114. 1 By inserting the end portion into the recessed portion 128 formed on the outer peripheral surface of the screw 120 (see FIGS. 4 and 19), movement of the first screw 120 in the first or second direction can be restricted .

1 to 4, the nail body 110 further includes a third insertion hole 115 formed through the main channel 111 in a horizontal direction perpendicular to the vertical direction inside the nail body 110. do.

The third insertion hole 115 is formed near the distal end of the nail body 110, and the third insertion hole 115 is formed to penetrate the nail body 110 and the femur 1, specifically the thigh 6. At least one fourth screw 150 may be inserted in the horizontal direction.

Exemplarily, the fourth screw 150 may be provided as two as shown in FIGS. 1 to 4, but is not limited thereto and may be provided as one or three or more depending on the characteristics of the human femur 1. It may also be provided as.

Meanwhile, in the embodiment illustrated in FIGS. 1 to 4, two third insertion holes 115 may be formed vertically spaced apart from each other near the distal end of the nail body 110, and the fourth screw 150 ) Additionally, two are arranged to be spaced apart vertically in the vertical direction of the nail body 110, and each can be inserted into the third insertion hole 115 in the horizontal direction (X3 axis direction). Accordingly, the fourth screw 150 can fix the lower part of the nail body 110.

1 to 4, the cap portion 160 may be coupled to the proximal end of the nail body 110. The cap portion 160 can prevent foreign substances from entering the main channel 111 of the nail body 110 by sealing the proximal end of the nail body 110.

FIG. 6 is a view showing the overall shape of the nail insertion device 200 according to an embodiment of the present invention, and FIG. 7 is a view showing the cross-sectional shape of the nail insertion device 200 according to an embodiment of the present invention. Figure 8 is a diagram showing an exploded perspective view of the nail insertion device 200 according to an embodiment of the present invention. Here, FIG. 7 exemplarily shows the case where the orientation angle of the sleeve is 125°, and in FIG. 8, the angle adjustment guide portion 234, support portion 237, and ring portion 238, which will be described later, are omitted.

6 to 8, the nail insertion device 200 (insertion device of nail) according to an embodiment of the present invention may be a device for inserting and fastening the nail 100 described above into the human femur 1. there is.

In detail, the nail insertion device 200 includes a handle portion 210, a nail connection portion 220, and a sleeve orientation angle adjusting portion 230.

The handle part 210 is The sleeve orientation angle adjusting part 230 includes a handle main body 212 inserted therein, and an extension part 214 whose one end is coupled to the handle main body 212 and the other end is coupled to the nail connection part 220. As an example, handle body 212 may be hollow.

At this time, the coupling between the handle body 212 and the extension part 214 may be achieved through screw coupling, and the extension part 214 may be formed in a curved shape as shown in FIGS. 6 to 8 and has elastic force and It may be made of a material with good strength, but is not limited to this.

One end of the nail connection portion 220 may be coupled to the handle portion 210 and the other end may be coupled to the nail 100 . More specifically, an extension portion 214 may be coupled to one end of the nail connection portion 220.

In addition, the nail connection part 220 includes an insertion hole 222 into which an insertion device (not shown) for inserting the nail 100 into the femur 1 is inserted, and a nail coupling part 224 coupled to the nail 100. . At this time, the nail coupling portion 224 may be coupled to the proximal end of the nail body 110.

When inserting the nail 100 into the femur (1), the skin at the greater trochanter (4) of the femur is cut and drilled in a vertical direction from the upper part of the greater trochanter (4) toward the femur (6) to form the femur (1). A hole through which the nail body 110 of the nail 100 can be inserted in the vertical direction may be formed. After the hole is formed, an insertion device (not shown) can insert the nail body 110 of the nail 100 into the femur 1 through the insertion hole 222 (see FIGS. 6, 7, and 16). .

Figure 9 is a diagram showing the sleeve orientation angle adjusting unit 230 provided in the nail insertion device 200 of the present invention. In FIG. 9, the illustration of the rotation prevention part 235, which will be described later, will be omitted.

Referring to FIGS. 6 to 9 , the sleeve orientation angle adjusting unit 230 is coupled to the handle unit 210 and can adjust the orientation angle of at least one sleeve (not shown) used when nail fastening. As an example, the sleeve may be configured to guide the insertion of the first screw 120, second screw 130, and fourth screw 150 into the nail 100, and may be formed in a hollow shape. Yes, in detail The sleeve includes a first sleeve (S1) that guides the insertion of the first screw (120), a second sleeve (S2) that guides the insertion of the second screw (130), and a fourth sleeve (S2) that guides the insertion of the fourth screw (150). 3 Includes sleeve (S3). At this time, one or two or more third sleeves (S3) may be provided corresponding to the number of fourth screws (150).

More specifically, the sleeve orientation angle adjustment unit 230 includes a shaft 231, a sleeve locking unit 232, a sleeve locking nut 233, an angle adjustment guide unit 234, and a rotation prevention unit 235. It includes an elastic part 236 and a support part 237.

The shaft 231 is inserted and coupled into the handle main body 212 and includes an enlarged diameter portion 231a and a reduced diameter portion 231b whose diameter is smaller than the enlarged diameter portion 231a.

The sleeve locking portion 232 is formed at the end of the enlarged diameter portion 231a and can rotate the shaft 231.

The sleeve locking nut 233 is coupled to one outer peripheral surface of the handle body 212 by the sleeve locking portion 232, and can apply force to secure the sleeve to the handle body 212 and the shaft 231.

The angle adjustment guide portion 234 is coupled to the end of the shaft diameter portion 231b, and includes a protrusion 234a that rotates in the same direction (e.g., clockwise) as the rotation direction of the shaft 231 according to the rotation of the shaft 231. Includes.

One side of the rotation prevention part 235 is coupled to the extension part 214, and the other side is inserted into the angle adjustment guide part 234, and can prevent movement of the protrusion 234a.

The elastic portion 236 is coupled to the outer peripheral surface of the shaft diameter portion 231b, and exerts an elastic restoring force in the direction opposite to the direction in which the shaft 231 is inserted when the shaft 231 advances and rotates within the handle body 212. It can be done. As an example, the elastic portion 236 may be a spring, but is not limited thereto.

The support part 237 is coupled to the outer peripheral surface of the diameter reduction part 231b, is located between the angle adjustment guide part 234 and the elastic part 236, and can support the elastic restoring force of the elastic part 236. As an example, the support portion 237 may be a washer, but is not limited thereto.

Figures 10 and 11 are diagrams showing a state in which the orientation angle of the sleeve fixing hole is adjusted according to the rotation of the shaft 231 provided in the sleeve orientation angle adjusting unit 230 of the present invention. Here, Figure 10 shows the case where the orientation angle of the first sleeve (S1) and the second sleeve (S2) is α1, and Figure 11 shows the case where the orientation angle of the first sleeve (S1) and the second sleeve (S2) is α2. represents. The orientation angles α1 and α2 shown in FIGS. 10 and 11 may correspond to the orientation angles α1 and α2 between the first screw 120 and the second screw 130 described above. In addition, the values of the orientation angle α1 and the orientation angle α2 are different from each other, and the orientation angle α1 may be 125° and the orientation angle α2 may be 130°, but are not limited to this and a preferred angle is selected according to the shape of the human femur. It can be.

Referring to FIGS. 10 and 11, the shaft 231 is formed to penetrate the inside of the enlarged diameter portion 231a and guides the first sleeve S1 (see FIG. 15) to be inclined in the first direction of the femur 1. It includes a first sleeve fixing hole (H1a) that guides the first sleeve (S1) to be inclined in the second direction of the femur (1) and a second sleeve fixing hole (H1b) that guides the first sleeve (S1).

In addition, the shaft 231 is formed to penetrate the inside of the enlarged diameter portion 231a, and has a third sleeve fixing hole ( H2a) and a fourth sleeve fixing hole (H2b) that guides the second sleeve (S2) to be inclined in the second direction of the femur (1).

10 and 11, the above-described first insertion hole 112, the first sleeve fixing hole (H1a), and the second sleeve fixing hole (H1b) are each oriented coaxially according to the rotation of the shaft 231. The second insertion hole 113, the third sleeve fixing hole H2a, and the fourth sleeve fixing hole H2b can also be oriented coaxially as the shaft rotates.

The first sleeve fixing hole (H1a) and the second sleeve fixing hole (H1b) are configured to guide the insertion of the first screw 120 into the nail 100, and the shaft ( 231) may have different orientation angles for the handle body 212 and the shaft 231 depending on the rotation angle (e.g., 90° clockwise rotation, 180° rotation).

For example, in the case shown in FIG. 10, the handle body 212 is tilted so that the first sleeve fixing hole H1a is inclined in the first direction at the first rotation angle (90° clockwise rotation) according to the rotation of the shaft 231. ) and may be oriented at an angle of α1 with respect to the shaft 231, and accordingly, the first sleeve S1 may have an orientation angle of α1. Meanwhile, in the case shown in FIG. 11, the handle body 212 is tilted so that the second sleeve fixing hole H1b is inclined in the second direction at a second rotation angle (clockwise rotation of 180°) according to the rotation of the shaft 231. and may be oriented at an angle of α2 with respect to the shaft 231, and thus the first sleeve S1 may have an orientation angle of α2.

In addition, the third sleeve fixing hole (H2a) and the fourth sleeve fixing hole (H2b) are configured to adjust the orientation angle of the second sleeve (S2), which is configured to guide the insertion of the second screw 130 into the nail 100. Depending on the rotation angle of the shaft 231 (e.g., 90° clockwise rotation, 180° rotation), the handle body 212 and the shaft 231 may have different orientation angles.

For example, in the case shown in FIG. 10, the handle body 212 is tilted so that the third sleeve fixing hole H2a is inclined in the first direction at the first rotation angle (90° clockwise rotation) according to the rotation of the shaft 231. ) and may be oriented at an angle of α1 with respect to the shaft 231, and accordingly, the second sleeve S2 may have an orientation angle of α1. Meanwhile, in the case shown in FIG. 11, the handle body 212 is tilted so that the fourth sleeve fixing hole H2b is inclined in the second direction at a second rotation angle (clockwise rotation of 180°) according to the rotation of the shaft 231. and may be oriented at an angle of α2 with respect to the shaft 231, and thus the second sleeve S2 may have an orientation angle of α2.

Referring again to FIGS. 10 and 11, the handle body 212 includes a first hole portion 213a1 communicating with the first sleeve fixing hole H1a, and a second hole portion 213a2 communicating with the second sleeve fixing hole H1b. ), a third hole portion 214b1 communicating with the third sleeve fixing hole H2a, and a fourth hole portion 214b2 communicating with the fourth sleeve fixing hole H2b.

For example, in the case shown in FIG. 10, the handle body 212 is tilted so that the first sleeve fixing hole H1a is inclined in the first direction at the first rotation angle (90° clockwise rotation) according to the rotation of the shaft 231. ) and may be oriented at an angle of α1 with respect to the shaft 231, and the first sleeve (S1) has an orientation angle of α1 and penetrates the first sleeve fixing hole (H1a) and the first hole portion (213a1). 1 Insertion of the screw 120 can be guided. Meanwhile, in the case shown in FIG. 11, the handle body 212 is tilted so that the second sleeve fixing hole H1b is inclined in the second direction at a second rotation angle (clockwise rotation of 180°) according to the rotation of the shaft 231. and may be oriented at an angle of α2 with respect to the shaft 231, and the first sleeve (S1) has an orientation angle of α2 and penetrates the second sleeve fixing hole (H1b) and the second hole portion (213a2) to form the first sleeve (S1). Insertion of the screw 120 can be guided.

In addition, in the case shown in FIG. 10, the handle body 212 is tilted so that the third sleeve fixing hole H2a is inclined in the first direction at the first rotation angle (90° clockwise rotation) according to the rotation of the shaft 231. and may be oriented at an angle of α1 with respect to the shaft 231, and the second sleeve (S2) has an orientation angle of α1 and penetrates the third sleeve fixing hole (H2a) and the third hole portion (214b1) to form the second sleeve (S2). Insertion of the screw 130 can be guided. Meanwhile, in the case shown in FIG. 11, the handle body 212 is tilted so that the fourth sleeve fixing hole H2b is inclined in the second direction at a second rotation angle (clockwise rotation of 180°) according to the rotation of the shaft 231. and may be oriented at an angle of α2 with respect to the shaft 231, and the second sleeve S2 has an orientation angle of α2 and penetrates the fourth sleeve fixing hole H2b and the fourth hole portion 214b2 to form the second sleeve S2. Insertion of the screw 130 can be guided.

Referring again to FIGS. 10 and 11, the shaft 231 is formed to penetrate the inside of the enlarged diameter portion 231a and guides the third sleeve S3 (see FIG. 20) in a horizontal direction perpendicular to the vertical direction. It further includes a 5th sleeve fixing hole (H3a) and a 6th sleeve fixing hole (H3b).

At this time, referring to FIGS. 10 and 11, the above-described third insertion hole 115, fifth sleeve fixing hole (H3a), and sixth sleeve fixing hole (H3b) are coaxially aligned with the rotation of the shaft 231. can be oriented.

The fifth sleeve fixing hole (H3a) and the sixth sleeve fixing hole (H3b) may be configured to insert a third sleeve (S3) configured to guide the insertion of the fourth screw 150 into the nail 100, , Unlike the above-described first to fourth sleeve fixing holes (H1a, H1b, H2a, H2b), the horizontal direction (X3 axis) regardless of the rotation of the shaft 231 (e.g., 90° clockwise rotation, 180° rotation) direction) can be oriented.

For example, in the case shown in FIG. 10, the fifth sleeve fixing hole H3a may be oriented in the horizontal direction at the first rotation angle (90° clockwise rotation) according to the rotation of the shaft 231. Accordingly, the third sleeve S3 can be inserted into the fifth sleeve fixing hole H3a in the horizontal direction to guide the insertion of the fourth screw 150. Meanwhile, in the case shown in FIG. 11, the sixth sleeve fixing hole (H3b) may be oriented in the horizontal direction at the second rotation angle (180° clockwise rotation) according to the rotation of the shaft 231, and accordingly, the sixth sleeve fixing hole (H3b) may be oriented in the horizontal direction. 3 The sleeve S3 may be inserted into the sixth sleeve fixing hole H3b in the horizontal direction to guide the insertion of the fourth screw 150.

Referring again to FIGS. 10 and 11 , the handle body 212 further includes a fifth hole portion 215c communicating with the fifth sleeve fixing hole H3a and the sixth sleeve fixing hole H3b. As an example, the fifth hole portion 215c may be provided in one or two or more pieces corresponding to the number of the third sleeve S3 and the fourth screw 150.

For example, in the case shown in FIG. 10, the fifth sleeve fixing hole H3a may be oriented in the horizontal direction at the first rotation angle (90° clockwise rotation) according to the rotation of the shaft 231, and the fifth sleeve fixing hole H3a may be oriented in the horizontal direction. 3 The sleeve S3 is also oriented in the horizontal direction and can guide the insertion of the fourth screw 150 through the fifth sleeve fixing hole H3a and the fifth hole portion 215c. Meanwhile, in the case shown in FIG. 11, the sixth sleeve fixing hole (H3b) may be oriented in the horizontal direction at the second rotation angle (clockwise rotation of 180°) according to the rotation of the shaft 231, and the third sleeve (S3) is also oriented in the horizontal direction and can guide the insertion of the fourth screw 150 by penetrating the sixth sleeve fixing hole (H3b) and the fifth hole portion (215c).

Figure 12 is a diagram showing the operation of the angle adjustment guide portion 234 and the rotation prevention portion 235 provided in the sleeve orientation angle adjustment portion 230 of the present invention. For convenience of explanation, the illustration of other members except the angle adjustment guide part 234 and the rotation prevention part 235 is omitted in FIG. 12 as much as possible.

Referring to FIGS. 6 to 12, as described above, the angle adjustment guide portion 234 provided in the sleeve orientation angle adjusting portion 230 of the present invention is coupled to the end of the reduced diameter portion 231b, and is connected to the shaft 231. It includes a protrusion 234a that rotates clockwise according to the rotation of .

In addition, the rotation prevention part 235 may be configured so that one side is coupled to the extension part 214 and the other side is inserted into the angle adjustment guide part 234 to prevent movement of the protrusion 234a.

More specifically, the rotation prevention part 235 includes a first locking part 235a, a second locking part 235b, and a third locking part 235c, and each of the first locking part 235a and the third locking part 235c The second locking portion 235b and the third locking portion 235c may be formed in the shape of a concave groove in the radial direction to accommodate the protrusion 234a provided on the angle adjustment guide portion 234. Preferably, as shown in FIG. 12, the angle between the first engaging portion 235a and the second engaging portion 235b may be 90°, and the second engaging portion 235b and the third engaging portion 235c ) may be 90°, and the angle between the first engaging portion 235a and the third engaging portion 235c may be 180°.

Additionally, the connection portion between the first engaging portion 235a, the second engaging portion 235b, and the third engaging portion 235c may be formed in a streamlined shape.

12(a) of FIG. 12 shows the state in which the shaft 231 is first inserted into the handle body 212, and the user (or operator) pushes the shaft 231 into the handle body 212 to insert the shaft ( 231) can be inserted into the handle body 212.

As shown in FIG. 12(a), the first locking portion 235a can prevent the protrusion 234a from moving when the shaft 231 is inserted into the handle body 212.

12(b) of FIG. 12 shows the state when the shaft 231 is rotated at the first rotation angle, and in the state of FIG. 12(a), the user (or operator) moves the shaft 231 to the handle body ( While pushing in the inner direction of 212), the shaft 231 is advanced to separate from the first locking portion 235a, and then rotated at a first rotation angle (90° clockwise), the protrusion is formed according to the rotation of the shaft 231. (234a) can also be rotated at a first rotation angle (90° clockwise), and as the shaft 231 moves backward due to the elastic restoring force of the elastic part 236 that was compressed by the forward movement of the shaft 231, the protrusion ( 234a) may be seated on the second engaging portion 235b.

As shown in FIG. 12(b), the second locking portion 235b rotates the protruding portion 234a at a first rotation angle (90° clockwise) from the state in which the shaft 231 is first inserted into the handle body 212. ), movement of the protrusion 234a can be prevented.

Meanwhile, as described above in the state of FIG. 12(b) (corresponding to the state of FIG. 10 described above), the first sleeve fixing hole ( H1a) and the third sleeve fixing hole (H2a) may be oriented to be inclined in the first direction. Additionally, in the state of FIG. 12(b), the fifth sleeve fixing hole H3a may be oriented in the horizontal direction.

12(c) of FIG. 12 shows the state when the shaft 231 is rotated at the second rotation angle, and in the state of FIG. 12(b), the user (or operator) moves the shaft 231 to the handle body ( 212), the shaft 231 is advanced and separated from the second locking portion 235b, and then the shaft 231 is rotated 90° more clockwise than the state in FIG. 12(b) (as shown in FIG. 2 rotation angle), the protrusion 234a may also be further rotated 90° clockwise (rotated at a second rotation angle) according to the rotation of the shaft 231, and is compressed by the advancement of the shaft 231. As the shaft 231 moves backward due to the elastic restoring force of the elastic part 236, the protrusion 234a may be seated on the third locking part 235c.

As shown in FIG. 12(c), the third locking portion 235c rotates the protruding portion 234a at a second rotation angle (180° clockwise) from the state in which the shaft 231 is initially inserted into the handle body 212. ), movement of the protrusion 234a can be prevented.

Meanwhile, as described above in the state of FIG. 12(c) (corresponding to the state of FIG. 11 described above), the second sleeve fixing hole ( H1b) and the fourth sleeve fixing hole (H2b) may be oriented. Additionally, in the state of FIG. 12(c), the sixth sleeve fixing hole H3b may be oriented in the horizontal direction.

As described above, the first sleeve fixing hole H1a and the second sleeve fixing hole H1b when the protrusion 234a is located in the second locking part 235b and the third locking part 235c. The orientation angles may be different from α1 and α2, respectively.

In addition, the orientation of the third sleeve fixing hole H2a and the fourth sleeve fixing hole H2b when the protrusion 234a is located in the second locking part 235b and the third locking part 235c. The angles may be different from α1 and α2, respectively.

According to the nail insertion device 200 of the present invention, the orientation angle of the sleeve used when fastening the nail 100 is configured to be adjustable with respect to the sleeve orientation angle adjusting unit 230 provided in the nail insertion device 200, thereby allowing various A nail insertion device 200 capable of selecting a fastening angle can be provided.

Figure 13 is a diagram showing the operation of the sleeve locking part 232 and the sleeve locking nut 233 provided in the sleeve orientation angle adjusting part 230 of the present invention, and Figure 14 is a diagram showing the operation of the nail insertion device 200 of the present invention. This is a perspective view of the sleeve locking nut 233 near one end of the outer peripheral surface of the handle body 212 provided. Here, in FIG. 13, FIG. 13(a) is a diagram showing a state in which the sleeve locking nut 233 is coupled to one end of the outer peripheral surface of the handle body 212, and FIG. 13(b) shows the sleeve locking nut 233 on the handle body 212. This is a diagram showing the state before combining (233).

Referring to Figures 13 and 14, the sleeve locking part 232 described above is formed at the end of the enlarged diameter part 231a and can rotate the shaft 231. Additionally, the sleeve locking nut 233 is coupled to one outer peripheral surface of the handle body 212 by the sleeve locking portion 232 and can apply force to secure the sleeve to the handle body 212 and the shaft 231.

More specifically, the sleeve locking part 232 is formed with a larger diameter than the bolt part 232a and the bolt part 232a on which a thread is formed on the outer peripheral surface to rotate the sleeve locking nut 233, and is connected to the shaft 231. It includes a gripping portion 232b that rotates. Although not shown, threads may be formed on some of the inner peripheral surfaces of the sleeve locking nut 233 to correspond to the bolt portion 232a of the sleeve locking portion 232. Additionally, the user (or operator) may advance or rotate the shaft 231 while holding the grip portion 232b of the sleeve locking portion 232.

13 and 14, the sleeve locking nut 233 includes a ring guide groove 233a that is seated on the outer peripheral surface of the ring portion 238 inserted into the ring insertion groove 212a formed on one outer peripheral surface of the handle body 212, and It includes a pin portion (233b) seated in the pin insertion groove (212b) of the handle body 212, which is formed to be spaced apart from the ring insertion groove (212a) in the vertical direction. As an example, the ring portion 238 may be a C-shaped C-ring, but is not limited thereto. In addition, the pin portion 233b may be formed to protrude in the inner direction of the sleeve locking nut 233 and may be integrally formed by welding to the main body of the sleeve locking nut 233, but is not limited thereto.

Referring to FIG. 13(a) of FIG. 13, the user (or operator) pushes the grip portion 232b of the sleeve locking portion 232 and tightens the bolt portion 232a of the sleeve locking portion 232 with the sleeve locking nut 233. ), and while rotating the sleeve locking nut 233 through the grip portion 232b, the sleeve locking nut 233 can be coupled to one outer peripheral surface of the handle body 212 as shown in FIG. 13(a). there is.

At this time, as shown in the enlarged cross-sectional view of FIG. 13(a) and FIG. 14, a guide groove 233a is formed on the inner peripheral surface of the sleeve locking nut 233, and as the sleeve locking nut 233 rotates, the ring guide groove ( When 233a) is seated on the ring portion 238 and the sleeve locking nut 233 is fastened to the handle body 212, separation of the sleeve locking nut 233 from the handle body 212 in the vertical direction can be prevented. . In addition, as shown in the enlarged cross-sectional view of FIG. 13(a) and FIG. 14, the pin portion 233b is seated in the pin insertion groove 212b of the handle body 212b, so that the pin portion 233b is connected to the sleeve locking nut 233. By restricting the rotation of the sleeve locking nut 233 from the handle body 212, loosening of the sleeve locking nut 233 from the handle body 212 can be prevented while the sleeve locking nut 233 is coupled to the handle body 212.

Meanwhile, referring to the enlarged cross-sectional view of FIG. 13(a) and FIG. 14, the handle body 212 is connected to the pin insertion groove 212b, and the pin portion 233b of the sleeve locking nut 233 is connected to the pin insertion groove ( A rotation groove formed so that the pin portion 233b of the sleeve locking nut 233 is inserted when separated from 212b and moved in the vertical direction so that the sleeve locking nut 233 can rotate along the outer peripheral surface of the handle main body 212. (212c) and a stepped portion connected to the rotation groove 212c and formed to protrude outward in the radial direction of the handle body 212 to prevent the sleeve locking nut 233 from being separated from the handle body 212 in the vertical direction. (212d) is further included.

Due to the configuration of the rotation groove 212c, the pin portion 233b is not restricted in the state shown in FIG. 13(b), so the sleeve locking nut 233 can rotate freely. In addition, when the sleeve locking nut 233 is moved in the vertical direction in a state in which the sleeve locking nut 233 is not coupled to the handle body 212 as shown in FIG. 13(b) due to the stepped portion 212d configuration, Since the pin portion 233b is caught on the step portion 212d, separation of the sleeve locking nut 233 from the handle main body 212 in the vertical direction can be prevented.

Figure 15 is a diagram showing a mechanism for fixing the sleeve to the nail insertion device 200 of the present invention. Here, FIG. 15(a) of FIG. 15 shows a mechanism for fixing the first sleeve S1, and FIG. 15(b) of FIG. 15 shows a mechanism for fixing the second sleeve S2.

Referring to FIG. 15(a), the first sleeve S1 used to insert the first screw 120 into the nail 100 is shown inserted into the handle body 212 and the shaft 231. .

As described above in the state of Figure 15 (a), the user (or operator) pushes the grip part 232b of the sleeve locking part 232 and tightens the bolt part 232a of the sleeve locking part 232 with the sleeve locking nut ( 233), and while rotating the sleeve locking nut 233 through the grip portion 232b, the sleeve locking nut 233 is coupled to one outer peripheral surface of the handle body 212 as shown in FIG. 13(a). You can.

At this time, as shown in FIG. 15(a), the first force due to the advancement of the shaft 231 and the rotation of the sleeve locking nut 233 (tightening of the sleeve locking nut 233) is applied to the first sleeve S1. It may act on, and a second force is applied to the first sleeve (S1) in the opposite direction to the force generated by the advancement of the shaft 231 and the rotation of the sleeve locking nut 233 by the elastic restoring force of the elastic portion 236. It can work. Accordingly, the first sleeve S1 can be fixed to the handle body 212 and the shaft 231.

Also, referring to FIG. 15(b), the second sleeve S2 used to insert the second screw 130 into the nail 100 is shown inserted into the handle body 212 and the shaft 231. The process of fixing the second sleeve (S2) is the same as the process described with reference to FIG. 15(a) except for fixing the second sleeve (S2) to the handle body 212 and the shaft 231. Detailed explanation about this will be omitted.

Meanwhile, although not shown in FIG. 15, the mechanism for fixing the third sleeve (S3) can also be implemented similarly to the mechanism for fixing the first sleeve (S1) or the second sleeve (S2) described above, and a detailed description thereof will be provided. should be omitted.

As described above, the nail insertion device 200 of the present invention is provided with a sleeve locking portion 232 and a sleeve locking nut 233, so that the sleeve used when fastening the nail 100 is connected to the handle body 212 and the shaft 231. It can be fixed stably, and thus accurate procedures can be performed.

Hereinafter, the process of inserting the nail 100 into the femur 1 will be described with reference to FIGS. 16 to 20.

Figure 16 is a diagram showing the process of inserting the nail body 110 into the femur 1 using the nail insertion device 200.

Referring to FIG. 16, when inserting the nail 100 into the femur 1 as described above, the skin at the greater trochanter 4 of the femur is cut and the thigh 6 is cut from the upper part of the greater trochanter 4 of the femur 4. By drilling in the vertical direction toward the femur 1, a hole through which the nail body 110 of the nail 100 can be inserted in the vertical direction can be formed. After the hole is formed, an insertion device (not shown) can insert the nail body 110 of the nail 100 into the femur 1 through the insertion hole 222 of the nail connector 220 described above.

Figure 17 is a diagram showing the process of inserting the first screw 120 into the nail body 110.

After inserting the nail body 110 into the femur 1 as shown in FIG. 16, the first screw 120 passes through the nail body 110 and enters the inside of the femur 1 as shown in FIG. 2. It can be inserted obliquely in the first or second direction.

In order to insert the first screw 120, the skin below the greater trochanter of the femur (4) is cut, and the first screw is inserted into the femoral neck (3) from the lower part of the greater trochanter (4) toward the femoral head (2). Drilling may be performed to pass through the insertion hole 112.

Referring to FIGS. 17(a) and 17(b) of FIG. 17, as described above, a groove 126 may be formed at the other end of the first screw 120, and a fastening mechanism (X) may be formed in the groove 126. ) of the protrusions (Xa) may be combined. As an example, as shown in FIG. 17(c), the number of grooves 126 and the protrusions Xa coupled thereto may be two, but is not limited thereto. Additionally, the fastening mechanism (X) may be a driver, but is not limited thereto.

Referring to FIG. 17(b) of FIG. 17, after inserting the first screw 120 into the nail body 110, the inserted first screw 120 is separated from the nail body 110 and the femur 1. To prevent this, a fastening mechanism (X) can be used.

In FIG. 17(b), the protrusion (Xa) of the fastening mechanism (X) and the groove portion 126 of the first screw 120 are combined, and then the fastening mechanism ( By engaging the internal thread 124 of the screw 120, the first screw 120 can be rotated to fix the first screw 120 to the nail body 110 and the femur 1.

Meanwhile, although not shown in detail, the first sleeve S1 may guide the insertion of the first screw 120 during the insertion process of the first screw 120 into the nail body 110. In detail, drilling may be performed through the inside of the first sleeve (S1), and after drilling, the first screw 120 passes through the inside of the first sleeve (S1) through a separate guide configuration (not shown). It can be inserted, and after the first screw 120 is inserted into the nail body 110, the fastening mechanism (X) is inserted into the first screw 120 through the inside of the first sleeve (S1) to (120) can be concluded.

Figure 18 is a diagram showing the process of inserting the second screw 130 into the nail body 110.

As described above, after inserting the first screw 120 into the nail body 110 and the femur 1, the second screw 130 passes through the nail body 110 and is inserted into the femur as shown in FIG. 2. (1) It can be inserted inside at an angle in the first or second direction.

In order to insert the second screw 130, the skin below the greater trochanter of the femur (4) is cut, and a second screw is inserted from the lower part of the greater trochanter (4) into the femoral neck (3) toward the femoral head (2). Drilling may be performed to pass through the insertion hole 113. In addition, although not shown in detail, during the insertion process of the second screw 130, a separate fastening means (not shown) is used to rotate the second screw 130, so that the pitch formed on the outer peripheral surface of the second thread 134 is 2 The second screw 130 can be fastened to the nail body 110 by engaging the thread formed on the inner peripheral surface of the insertion hole 113.

Meanwhile, although not shown in detail, the second sleeve S2 guides the insertion of the second screw 130 in the process of inserting the second screw 130 into the nail body 110 in a similar manner to the first sleeve S1. can do.

Referring to FIG. 18 , the step portion 138 is formed between the second thread 134 and the third thread 136 and may be fixed to the second insertion hole 113. In this way, the step portion 138 is provided between the second thread 134 and the third thread 136, and the step portion 138 is fixed to the second insertion hole 113, thereby loosening the second screw 130. can be prevented.

Figure 19 is a diagram showing the process of inserting the third screw 140 into the nail body 110.

As described above, after inserting the second screw 130 into the nail body 110 and the femur 1, the third screw 140 is inserted into the nail body 110 as shown in FIG. 19. It can be done as much as possible.

At this time, the third screw 140 may be inserted into the screw insertion portion 114 formed in a vertical direction inside the proximal end of the nail body 110, and the third screw 140 may be inserted into the screw insertion portion 114. When inserted, the end portion is inserted into the recessed portion 128 formed on the outer peripheral surface of the first screw 120, thereby restricting movement of the first screw 120 in the first or second direction.

Figure 20 is a diagram showing the process of inserting the fourth screw 150 into the nail body 110. At this time, illustration of the first screw 120, second screw 130, and third screw 140 described above in FIG. 20 will be omitted.

As described above, after inserting the third screw 140 into the nail body 110, the fourth screw 150 moves the nail body 110 and the thigh portion 6 in the vertical direction as shown in FIG. 20. It can be inserted through penetration in a vertical or horizontal direction.

In order to insert the fourth screw 150, the skin of the thigh 6 may be cut, and drilling may be performed to pass through the third insertion hole 115 so as to penetrate the thigh 6 in a horizontal direction. In addition, although not shown in detail, during the insertion process of the fourth screw 150, a separate fastening means (not shown) is used to rotate the fourth screw 150 to attach the fourth screw 150 to the nail body 110. And it can be fixed to the femur (1, specifically the femur (6)).

Meanwhile, although not shown in detail, the third sleeve S3 is connected to the fourth screw 150 in the process of inserting the fourth screw 150 into the nail body 110 in a similar manner to the first sleeve S1 and the second sleeve S2. The insertion of (150) can be guided.

Meanwhile, in the embodiment of the present invention, the process of inserting the fourth screw 150 into the nail body 110 is not an essential process, and the fourth screw 150 does not need to be inserted into the nail body 110.

After inserting the fourth screw 150 into the nail body 110, the cap portion 160 is coupled to the proximal end of the nail body 110 as shown in FIGS. 1 to 4 to attach the cap portion 160 to the proximal end of the nail body 110. The end can be sealed.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Nail
110: Nail body
120: first screw
130: second screw
140: third screw
150: 4th screw
160: cap part
200: Nail insertion device
210: handle part
220: Nail connection part
230: Sleeve orientation angle adjustment unit

Claims (11)

In the nail inserted into the human femur,
a nail body inserted into the femur in a vertical direction;
a first screw passing through the nail body and obliquely inserted into the femur; and
A second screw is spaced apart from the first screw, passes through the nail body, and is obliquely inserted into the femur.
The second screw is,
a first thread formed on one end of the second screw and inserted into the upper part of the femur;
a second thread connected to the first thread, having a larger diameter than the first thread, and fastened to the nail body; and
A third thread connected to the second thread and having a larger diameter than the second thread,
The pitch of the screw threads formed on the outer peripheral surface of the first thread and the pitch of the screw threads formed on the outer peripheral surface of the third thread are the same,
The pitch of the screw threads formed on the outer peripheral surface of the second thread is narrower than the pitch of the screw threads formed on the outer peripheral surface of the first thread and the pitch of the screw threads formed on the outer peripheral surface of the third thread,
Nail, characterized in that the second screw is located below the first screw with respect to the femoral head of the femur. According to clause 1,
The nail body is,
a main channel formed in a vertical direction inside the nail body;
A first insertion hole formed through the main channel to be inclined inside the nail body, and
A second insertion hole is formed through the main channel to be inclined inside the nail body and is vertically spaced apart from the first insertion hole,
Nail, characterized in that the first screw is inserted into the first insertion hole, and the second screw is inserted into the second insertion hole. According to clause 1,
The first screw is,
a threaded end formed at one end of the first screw and inserted into the upper part of the femur; and
A nail comprising an internal thread formed on the inside of the first screw near the other end of the first screw. According to clause 3,
The first screw further includes a groove formed at the other end of the first screw,
Nail, characterized in that the protrusion of a fastening mechanism that rotates the first screw is coupled to the groove portion. According to clause 1,
The second screw is,
A nail further comprising a step portion formed between the second thread and the third thread and fixed to the second insertion hole. delete According to clause 2,
The nail body is,
Further comprising a screw insertion portion formed in the vertical direction inside the proximal end of the nail body,
Nail, characterized in that a third screw that restrains the movement of the first screw is inserted into the screw insertion portion. According to clause 2,
The nail body is,
Further comprising a third insertion hole formed inside the nail body through the main channel in a horizontal direction perpendicular to the vertical direction,
The third insertion hole is formed near the distal end of the nail body, and at least one fourth screw is inserted into the third insertion hole in the horizontal direction so as to penetrate the nail body and the femur. . According to clause 1,
A nail further comprising a cap portion coupled to the proximal end of the nail body. delete delete

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