Femoral neck fracture multi-nail fixation auxiliary navigation system

Abstract

The invention discloses a femoral neck fracture multi-nail fixation auxiliary navigation system, and belongs to the technical field of medical instruments, the femoral neck fracture multi-nail fixation auxiliary navigation system comprises a lifting frame and a kirschner wire, a connecting seat is arranged at the upper end of the lifting frame, a connecting block is hinged to the upper end of the connecting seat, a locking handle is arranged at the hinged position, and a guide rail is fixedly arranged at the upper end of the connecting block; the kirschner wire feeding device further comprises an auxiliary assembly used for assisting kirschner wire feeding and an angle measuring instrument, and a driving assembly used for driving the movable frame to move so that the movable frame can drive the angle measuring instrument to turn over is arranged in the guide rail. The guide rail and the two sighting frames are arranged, the two sighting frames can flexibly slide on the guide rail and are fixed through the locking rotary knobs, the position is convenient to adjust, the multiple sighting holes distributed in the sighting frames in a scattering mode can help a doctor to accurately plan the kirschner wire inserting direction according to actual operation requirements, the needle inserting angle deviation is effectively avoided, and the operation efficiency is improved. The accuracy of multi-nail fixing is remarkably improved, the operation effect is improved, and postoperative recovery of a patient is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a multi-nail fixation auxiliary navigation system for femoral neck fractures. Background Art

[0002] Femoral neck fracture is a common hip injury that often occurs in the elderly. Due to the special blood supply to this area, it is difficult to heal after fracture, and it is also easy to cause complications such as avascular necrosis of the femoral head. Multi-nail fixation surgery is a commonly used treatment method, which aims to fix the fracture site with multiple Kirschner wires or screws to promote fracture healing. However, there are many challenges in traditional surgical operations. Traditional surgical operations lack effective real-time navigation assistance, and the angle and position of the needle are difficult to control accurately. During the operation, the doctor needs to rely on his own experience and two-dimensional imaging data to determine the angle and position of the Kirschner wire. However, the anatomical structure of the human femoral neck is complex and there are large individual differences. Even experienced doctors find it difficult to ensure that each needle is inserted accurately. Deviation in the needle angle may lead to unstable fixation, affect the fracture healing effect, and even require a second operation. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems and to propose a multi-nail fixation auxiliary navigation system for femoral neck fractures.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-nail fixation auxiliary navigation system for femoral neck fractures, comprising a lifting frame and a Kirschner wire, wherein the upper end of the lifting frame is provided with a connecting seat, the upper end of the connecting seat is hinged with a connecting block and a locking handle is provided at the hinge, the upper end of the connecting block is fixed with a guide rail, and further comprising: An auxiliary component for assisting the insertion of a Kirschner wire: the number of the auxiliary components is two, and the auxiliary components include a moving block slidably connected to the guide rail and an aiming frame fixedly arranged on the upper end of the moving block, and a locking knob matching the guide rail is arranged on the side of the moving block; Angle measuring instrument: A movable frame is slidably provided inside the guide rail, the upper end surface of the movable frame is flush with the upper end surface of the guide rail, a mounting plate is hingedly provided on the upper end of the movable frame, the angle measuring instrument is fixedly mounted on the surface of the mounting plate, and a driving component is provided inside the guide rail for driving the movable frame to move so as to drive the angle measuring instrument to flip.

[0005] As a further description of the above technical solution: The driving assembly includes a screw rod and end plates respectively fixed at both ends of the guide rail, and the two ends of the screw rod are rotatably connected to the end plates respectively. A motor for driving the screw rod to rotate is arranged on the outer side of one of the end plates, and a notch groove matching with the movable frame is opened on the other end plate. A threaded seat matching with the threaded connection of the screw rod is slidably arranged inside the guide rail, and the threaded seat is connected to the movable frame by a first spring. A buffer matching with the mounting plate is arranged on one side of the movable frame.

[0006] As a further description of the above technical solution: The buffer comprises a deflection plate and a fixed plate arranged on one side of the moving frame. The deflection plate is rotatably connected to the fixed plate and a torsion spring is arranged at the rotation connection. One of the end plates is provided with a deflection groove matched with the deflection plate.

[0007] As a further description of the above technical solution: One side of the threaded seat is provided with an extrusion rod for extruding the deflection plate to deflect and retract, and the surface of the mounting plate is provided with a clamping groove matched with the extrusion rod.

[0008] As a further description of the above technical solution: A cover plate for protecting the angle measuring instrument is hingedly provided at one end of the mounting plate through a reset hinge, a top plate for squeezing the cover plate to close it is provided at the upper end of the threaded seat through an elastic connecting piece, an embedding groove matching with the top plate is provided at the upper end of the threaded seat, a fixing strip matching with the elastic connecting piece is provided on the inner bottom surface of the guide rail, and a sliding groove matching with the fixing strip is provided at the lower end of the threaded seat.

[0009] As a further description of the above technical solution: Two T-shaped rods are symmetrically penetrated through the surface of the threaded seat, and the smaller ends of the two T-shaped rods are fixedly connected to the moving frame.

[0010] As a further description of the above technical solution: A plurality of aiming holes for Kirschner wires to pass through are provided on the surface of the aiming frame, and the plurality of aiming holes are distributed in a scattered manner.

[0011] As a further description of the above technical solution: The guide rail is fixedly connected to the connecting block by countersunk bolts, and the inner bottom surface of the guide rail is provided with countersunk holes matched with the countersunk bolts.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In the present invention, by providing a guide rail and two aiming frames, the two aiming frames can slide flexibly on the guide rail and be fixed by a locking knob, so that the position can be adjusted conveniently. The multiple aiming holes distributed in a scattered manner on the aiming frames can help doctors accurately plan the insertion direction of the Kirschner wire according to actual surgical needs, effectively avoiding the deviation of the insertion angle, significantly improving the accuracy of multi-nail fixation, helping to improve the surgical effect, and promoting the patient's postoperative recovery. In the present invention, by providing an angle measuring instrument, a mounting plate, a mobile frame, and a driving assembly, the angle measuring instrument can be flipped to a horizontal state and fit the guide rail through the driving assembly before the operation, so that the doctor can quickly measure the inclination angle of the guide rail and then accurately determine the insertion angle of the Kirschner wire. After the measurement is completed, the angle measuring instrument can be flipped down and stored to avoid it hindering the subsequent insertion of the guide needle. The whole process is convenient and efficient, and the continuity of the surgical operation is ensured while improving the convenience of operation. In the present invention, by providing a cover plate, a top plate, an elastic connector, and a fixing strip, the cover plate remains open under the action of the reset hinge, which does not affect the use of the angle measuring instrument; when the angle measuring instrument is stored, the threaded seat first drives the top plate to move upward and then drives the top plate to squeeze the cover plate closed, effectively protecting the angle measuring instrument from damage such as collision and contamination during surgery. At the same time, the buffer member acts as a buffer during the flipping process of the angle measuring instrument, and the cooperation between the extrusion rod and the clamping groove plays a limiting role, ensuring its stable storage state, reducing the risk of equipment damage, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The overall appearance of the auxiliary navigation system provided by the embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of the auxiliary navigation system in use state provided by an embodiment of the present invention is shown; Figure 3 A schematic diagram of the storage state structure of the auxiliary navigation system provided by an embodiment of the present invention is shown; Figure 4 A schematic diagram of the structure of a moving block and a sighting frame provided in an embodiment of the present invention is shown; Figure 5 It shows a schematic structural diagram of the guide rail and the end plate in a separated state according to an embodiment of the present invention; Figure 6 A schematic diagram of the tilt state structure of an angle measuring instrument provided in an embodiment of the present invention is shown; Figure 7 A schematic diagram of the vertical state structure of an angle measuring instrument provided by an embodiment of the present invention is shown; Figure 8 A schematic diagram of a local structure of a driving assembly provided according to an embodiment of the present invention is shown; Fig. 9It shows a structural schematic diagram of the connection state between the threaded seat and the mobile frame provided in an embodiment of the present invention; Fig.10 A partial structural cross-sectional view of a driving assembly provided according to an embodiment of the present invention is shown; Fig.11 It shows a schematic structural diagram of a mobile frame, an end plate and a mounting plate in a separated state according to an embodiment of the present invention; Fig.12 A schematic diagram of the structure of one of the end plates provided according to an embodiment of the present invention is shown.

[0014] Legend: 1. Lifting frame; 2. Connecting seat; 3. Connecting block; 4. Guide rail; 5. Moving block; 6. Aiming frame; 7. Angle measuring instrument; 8. Kirschner wire; 9. Motor; 10. Through hole; 11. Cover plate; 12. Threaded seat; 13. End plate; 14. Countersunk hole; 15. Fixing strip; 16. Mounting plate; 17. Screw rod; 18. T-bar; 19. First spring; 20. Bracket; 21. Fixing block; 22. Top plate; 23. Slide groove; 24. Lifting rod; 25. Second spring; 26. Pressure block; 27. Deflection plate; 28. Fixing plate; 29. ​​Extrusion rod; 30. Deflection groove; 31. Notch groove; 32. Snap-in groove; 33. Aiming hole. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1-Figure 12 As shown, the multi-nail fixation auxiliary navigation system for femoral neck fracture includes a lifting frame 1 and a Kirschner wire 8. The upper end of the lifting frame 1 is provided with a connecting seat 2, and the connecting seat 2 is fixedly connected to the lifting frame 1 by bolts. The upper end of the connecting seat 2 is hinged with a connecting block 3 and a locking handle is provided at the hinge. The upper end of the connecting block 3 is fixed with a guide rail 4. The inclination angle of the connecting seat 2 can be adjusted by loosening the locking handle, that is, the inclination angle of the guide rail 4 can be adjusted. After the angle adjustment is completed, the locking handle is tightened. The system also includes: Auxiliary components for assisting the insertion of the Kirschner wire 8: There are two auxiliary components, which include a moving block 5 slidably connected to the guide rail 4 and an aiming frame 6 fixedly arranged on the upper end of the moving block 5. A locking knob matched with the guide rail 4 is arranged on the side of the moving block 5. The moving block 5 can slide in the guide rail 4 to adjust its position. After the adjustment is completed, the locking knob can be tightened. The aiming frame 6 is fixedly connected to the moving block 5 by bolts. A plurality of aiming holes 33 for the Kirschner wire 8 to pass through are opened on the surface of the aiming frame 6. The plurality of aiming holes 33 are scatteredly distributed. The staff passes the Kirschner wire 8 through the aiming holes 33. The two points are in a straight line, which can play a role in navigation assistance for the insertion direction of the Kirschner wire 8. Angle measuring instrument 7: A movable frame is slidably arranged inside the guide rail 4, and the upper end surface of the movable frame is flush with the upper end surface of the guide rail 4. The movable frame includes a bracket 20 slidably arranged inside the guide rail 4 and a fixed block 21 fixedly arranged at the upper end of one side of the bracket 20. The upper end of the fixed block 21 is hingedly provided with a mounting plate 16. The angle measuring instrument 7 is fixedly mounted on the surface of the mounting plate 16. The angle measuring instrument 7 is fixedly connected to the mounting plate 16 by bolts. When the angle measuring instrument 7 is on the upper end surface of the guide rail 4 (refer to the attached manual), the angle measuring instrument 7 is fixedly connected to the mounting plate 16 by bolts. Figure 2 ), at this time, the angle measuring instrument 7 can measure the inclination angle of the guide rail 4, that is, the insertion angle of the subsequent Kirschner wire 8. The surface of the angle measuring instrument 7 has a display screen for displaying the inclination angle. The guide rail 4 is provided with a driving component for driving the moving frame to move so that it drives the angle measuring instrument 7 to flip. The driving component causes the moving frame to move to one end of the guide rail 4 (refer to the attached manual). Figure 2 With the instruction manual Figure 7 ), because the movement of the mobile frame drives the installation plate 16 to move, which in turn causes the installation plate 16 to be separated from the upper end surface of the guide rail 4. Therefore, under the action of gravity, the installation plate 16 will flip downward and be on one side of the guide rail 4 (refer to the attached manual). Figure 3 ), so that an operating space is reserved at the upper end of the guide rail 4, so that subsequent staff can use external tools to connect the Kirschner wire 8 with the external tool, and the external tool drives the Kirschner wire 8 to gradually advance the needle.

[0017] Further, the driving assembly includes a screw rod 17 and end plates 13 respectively fixed at both ends of the guide rail 4, the two ends of the screw rod 17 are respectively connected to the end plates 13 for rotation, and a through hole 10 matching the screw rod 17 is opened in the middle of the moving block 5. A motor 9 for driving the screw rod 17 to rotate is arranged on the outer side of one of the end plates 13, and the output shaft of the motor 9 is connected to the screw rod 17 through a coupling. The other end plate 13 is provided with a notch groove 31 matching the fixed block 21 (refer to the appendix of the specification). Fig.11), so that the fixing block 21 slides into the notch groove 31, which will cause the mounting plate 16 to break away from the support of the upper end surface of the end plate 13. A threaded seat 12 is provided inside the guide rail 4 for sliding, and the threaded seat 12 is threadedly connected with the screw rod 17. The threaded seat 12 is connected to the bracket 20 through the first spring 19. The motor 9 drives the screw rod 17 to rotate. Under the action of the threaded connection, the screw rod 17 rotates to drive the threaded seat 12 to move. The movement of the threaded seat 12 pushes the bracket 20 to move through the first spring 19. The movement of the bracket 20 drives the mounting plate 16 to move through the fixing block 21, and then drives the angle measuring instrument 7 to move. Under the cooperation of the mounting plate 16 and the guide rail 4, the storage effect of the angle measuring instrument 7 is achieved (refer to the attached manual). Figure 7 When the screw rod 17 drives the threaded seat 12 to move to the right, the mounting plate 16 will gradually flip upward, and then the mounting plate 16 will flip to a horizontal state, and then slide on the upper end surface of the guide rail 4). A buffer member that cooperates with the mounting plate 16 is provided on one side of the bracket 20. Under the action of the buffer member, a buffer effect is played on the downward flipping of the mounting plate 16.

[0018] Furthermore, the buffer member includes a deflection plate 27 and a fixed plate 28 arranged on one side of the movable frame. The deflection plate 27 is rotatably connected to the fixed plate 28 and a torsion spring is provided at the rotatable connection. One of the end plates 13 is provided with a deflection groove 30 that matches the deflection plate 27. When in use, as the bracket 20 moves to the end of the guide rail 4, the bracket 20 drives the fixed plate 28 to move, and the fixed plate 28 drives the deflection plate 27 to move, so that the deflection plate 27 moves from the deflection groove 30 to the outside of the end plate 13 to prepare for buffering. Then, when the mounting plate 16 is flipped downward, the deflection plate 27 will be squeezed to deflect it. At this time, under the action of the torsion spring, a buffering effect is achieved.

[0019] Furthermore, a squeeze rod 29 is provided on one side of the threaded seat 12 for squeezing the deflection plate 27 to deflect and retract, and a clamping groove 32 is provided on the surface of the mounting plate 16 to cooperate with the squeeze rod 29. When the mounting plate 16 is turned down and contacts the deflection plate 27 (see the attached manual), the mounting plate 16 is Figure 6 ), then the screw 17 continues to rotate (refer to the instruction manual Figure 8 And the instruction manual Fig.11 , the screw rod 17 continues to drive the threaded seat 12 to move to the left). At this time, since the bracket 20 is in contact with the end plate 13, the movement is restricted. Therefore, when the screw rod 17 continues to rotate to drive the threaded seat 12 to move, the first spring 19 will be gradually compressed. In this process, the threaded seat 12 moves relative to the bracket 20. The movement of the threaded seat 12 drives the extrusion rod 29 to move. The extrusion rod 29 gradually squeezes one side of the deflection plate 27, causing the deflection plate 27 to deflect (refer to the attached manual). Fig.11, the extrusion rod 29 squeezes the deflection plate 27, which will cause the deflection plate 27 to deflect counterclockwise, which is the same direction as the mounting plate 16 squeezes the deflection plate 27 to deflect it). After the deflection plate 27 is deflected, the support for the mounting plate 16 is released. At this time, the mounting plate 16 will slowly flip downward with the deflection of the deflection plate 27 until it flips to a vertical state and contacts the outer surface of the end plate 13, preparing for the extrusion rod 29 to be clamped into the clamping groove 32. Then the extrusion rod 29 continues to move and will be inserted into the clamping groove 32, achieving the effect of limiting the flipping of the mounting plate 16, thereby ensuring the stability of the mounting plate 16 in the vertical state, that is, ensuring the stability of the angle measuring instrument 7 in the storage state.

[0020] Furthermore, a cover plate 11 for protecting the angle measuring instrument 7 is hingedly provided at one end of the mounting plate 16 through a reset hinge. Under the action of the reset hinge, the cover plate 11 is in an open state, that is, in a parallel state with the mounting plate 16 (see the appendix of the manual). Figure 3 Or the instruction manual Figure 7 ), the upper end of the threaded seat 12 is provided with a top plate 22 for squeezing the cover plate 11 to close it through an elastic connector, the upper end of the threaded seat 12 is provided with an embedding groove that matches the top plate 22, the inner bottom surface of the guide rail 4 is provided with a fixing strip 15 that matches the elastic connector, and the lower end of the threaded seat 12 is provided with a slide groove 23 that matches the fixing strip 15. The elastic connector includes a lifting rod 24 that is movably penetrated by the threaded seat 12, the upper end of the lifting rod 24 is fixedly connected to the top plate 22, and the lower end of the lifting rod 24 is fixedly provided with a pressure block 26, the pressure block 26 is hemispherical, and the top surface of the slide groove 23 is provided with a mounting cavity that matches the pressure block 26, and the upper end of the pressure block 26 is connected to the top surface of the mounting cavity through a second spring 25 (refer to the attached manual Fig.10 ), during the process in which the first spring 19 is gradually compressed (refer to the appendix of the specification Figure 7 ), the continued movement of the threaded seat 12 will cause the pressure block 26 to gradually contact the fixed bar 15. A slope that matches the pressure block 26 is provided on one side of the fixed bar 15, which will cause the pressure block 26 to move upward. The upward movement of the pressure block 26 will compress the second spring 25. At the same time, the upward movement of the pressure block 26 drives the top plate 22 to move upward through the lifting rod 24. The upward movement of the top plate 22 is ready for squeezing the cover plate 11 to flip and close. When the pressure block 26 slides in contact with the upper surface of the fixed bar 15, the threaded seat 12 continues to move to drive the top plate 22 to move. The top plate 22 will gradually squeeze the cover plate 11, so that it covers the outside of the angle measuring instrument 7, thereby achieving a protective effect.

[0021] Furthermore, two T-shaped rods 18 are symmetrically provided on the surface of the threaded seat 12, and the smaller ends of the two T-shaped rods 18 are fixedly connected to the moving frame. When the screw rod 17 rotates in the reverse direction to drive the threaded seat 12 to move in the reverse direction (refer to the appendix of the manual), the threaded seat 12 moves in the reverse direction. Figure 7When the threaded seat 12 moves to the right, the threaded seat 12 will contact the larger end of the T-bar 18, thereby driving the bracket 20 to move, thereby preventing the first spring 19 from being stretched and deformed during the reverse movement.

[0022] Furthermore, the guide rail 4 is fixedly connected to the connecting block 3 by countersunk bolts. The inner bottom surface of the guide rail 4 is provided with countersunk holes 14 that match the countersunk bolts. There are multiple countersunk holes 14 that are linearly distributed, which is convenient for adjusting the installation position of the guide rail 4 and the connecting block 3.

[0023] Working principle: First, let the patient lie on the traction bed, and use the Kirschner wire 8 to make a positioning on the patient's skin (fixed with tape). After determining the position, use the laser generator to shoot a "straight line" laser vertically downward just above the Kirschner wire 8, so that the straight line of the laser overlaps with the Kirschner wire 8, and then remove the Kirschner wire 8. At this time, the straight line laser is the needle insertion direction for multi-pin fixation of femoral neck fracture (that is, the direction of the neck angle is determined). After determining the direction, move the auxiliary navigation system to the side of the traction bed, adjust the angle and height of the guide rail, and after aligning the direction, the guide needle can be accurately inserted into the femoral neck; Specifically, in the process of adjusting the angle, it is necessary to use the angle measuring instrument 7 to accurately measure the angle of the guide rail 4. The angle measuring instrument 7 is flipped into a horizontal state through the driving component and fits with the upper end surface of the guide rail 4, which is convenient for the quick installation and use of the angle measuring instrument 7. When inserting the guide needle later, the angle measuring instrument 7 is flipped downward and stored through the driving component to avoid the angle measuring instrument 7 being above the guide rail 4 and affecting the operation of external tools. After the angle measuring instrument 7 is stored, the staff can use external tools to accurately insert the guide needle.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-pin fixation auxiliary navigation system for femoral neck fractures, comprising a lifting frame (1) and a Kirschner wire (8), characterized in that: The lifting frame (1) has a connecting seat (2) at the upper end, a connecting block (3) is hingedly provided at the upper end of the connecting seat (2), and a locking handle is provided at the hinge, a guide rail (4) is fixedly provided at the upper end of the connecting block (3), and further comprises: An auxiliary component for assisting the insertion of a Kirschner wire (8): the auxiliary components are two in number, the auxiliary components comprising a moving block (5) slidably connected to the guide rail (4) and an aiming frame (6) fixedly arranged on the upper end of the moving block (5), and a locking knob cooperating with the guide rail (4) is arranged on the side of the moving block (5); Angle measuring instrument (7): a movable frame is slidably provided inside the guide rail (4), the upper end surface of the movable frame is flush with the upper end surface of the guide rail (4), a mounting plate (16) is hingedly provided at the upper end of the movable frame, the angle measuring instrument (7) is fixedly mounted on the surface of the mounting plate (16), and a driving component is provided inside the guide rail (4) for driving the movable frame to move so as to drive the angle measuring instrument (7) to flip.

2. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 1, characterized in that: The driving assembly comprises a screw rod (17) and end plates (13) respectively fixed at two ends of the guide rail (4), the two ends of the screw rod (17) are respectively rotatably connected to the end plates (13), one of the end plates (13) is provided with a motor (9) for driving the screw rod (17) to rotate, and the other end plate (13) is provided with a notch groove (31) matching with the moving frame, and the guide rail (4) is slidably provided with a threaded seat (12) threadedly connected with the screw rod (17), the threaded seat (12) and the moving frame are connected via a first spring (19), and a buffer member matching with the mounting plate (16) is provided on one side of the moving frame.

3. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 2, characterized in that: The buffer member comprises a deflection plate (27) and a fixed plate (28) arranged on one side of the movable frame, the deflection plate (27) and the fixed plate (28) being rotatably connected and a torsion spring is provided at the rotatable connection, and one of the end plates (13) is provided with a deflection groove (30) matching the deflection plate (27).

4. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 3, characterized in that: A squeezing rod (29) for squeezing the deflection plate (27) to deflect and retract is provided on one side of the threaded seat (12), and a clamping groove (32) matching with the squeezing rod (29) is provided on the surface of the mounting plate (16).

5. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 2, characterized in that: A cover plate (11) for protecting the angle measuring instrument (7) is hingedly provided at one end of the mounting plate (16) via a reset hinge, a top plate (22) for squeezing the cover plate (11) to close it is provided at the upper end of the threaded seat (12) via an elastic connecting piece, an embedding groove matching with the top plate (22) is provided at the upper end of the threaded seat (12), a fixing strip (15) matching with the elastic connecting piece is provided on the inner bottom surface of the guide rail (4), and a sliding groove (23) matching with the fixing strip (15) is provided at the lower end of the threaded seat (12).

6. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 2, characterized in that: Two T-shaped rods (18) are symmetrically provided through the surface of the threaded seat (12), and the smaller ends of the two T-shaped rods (18) are fixedly connected to the movable frame.

7. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 1, characterized in that: A plurality of aiming holes (33) for Kirschner wires (8) to pass through are formed on the surface of the aiming frame (6), and the plurality of aiming holes (33) are distributed in a scattered manner.

8. The multi-nail fixation auxiliary navigation system for femoral neck fracture according to claim 1, characterized in that: The guide rail (4) is fixedly connected to the connection block (3) via countersunk bolts, and a countersunk hole (14) matching the countersunk bolt is provided on the inner bottom surface of the guide rail (4).

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