Self-locking arc-shaped nail

Abstract

The utility model discloses a self-locking arc-shaped nail, which relates to the field of fracture fixing nails, and comprises a middle connecting end comprising a plurality of connecting joints, the axial head end and the axial tail end of each connecting joint are respectively provided with a hinge shaft and a hinge hole, and the connecting joints are axially provided with wire passing holes in a penetrating manner; the arc screw thread end is connected with one end of the middle connecting end, and threads are arranged on the peripheral surface of the arc screw thread end; the front-end outer sleeve is connected with the other end of the middle connecting end, a pull wire is arranged in the front-end outer sleeve, one end of the pull wire is connected with an inner shrinkage pipe arranged in the front-end outer sleeve, the other end of the pull wire penetrates through a wire passing hole of the connecting joint to be connected with the threaded end of the arc screw, and the inner shrinkage pipe is matched with the front-end outer sleeve; according to the self-locking arc-shaped nail, the whole arc-shaped nail is driven by the thread end of the arc-shaped nail to rotate and advance along the arc-shaped nail channel, after the arc-shaped nail reaches a preset position, the thread and the front-end outer sleeve lock and fix a pull wire, and finally the arc-shaped nail is bent, locked and fixed along the arc-shaped channel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fracture fixation nail, more particularly, relate to a self locking arc nail. BACKGROUND

[0002] After the reduction of the pelvic fracture is completed, the reduced pelvis needs to be fixed, because the structure of the pelvis is irregularly curved, the traditional built-in straight linear bone nail will exist when perforating the pelvis and reduce the fixing effect, or the fixing is difficult, in order to solve the problem, a bone nail capable of free deformation and embedded in the cortical bone of the pelvis along the arc-shaped channel is needed to solve the problem of reliable fixation after the reduction of the pelvis. SUMMARY

[0003] The utility model discloses in order to solve the technical problem in the prior art, provide a self locking arc nail, the self locking arc nail is driven by the arc screw thread end and is rotated forward along the arc screw channel, after reaching the predetermined position, the thread and the front end outer sleeve tube lock the traction line, finally realize the bending locking of the arc screw along the arc channel.

[0004] In order to realize the above-mentioned purpose, the utility model provides a self locking arc nail, including:

[0005] The middle connecting end includes a plurality of connecting sections, the connecting sections are provided with hinged shafts and hinged holes at the axial ends, the hinged shafts and the hinged holes are perpendicular to each other, the connecting sections are provided with wire passing holes along the axial direction, and all the connecting sections are sequentially connected to form the middle connecting end.

[0006] The arc screw thread end is connected with one end of the middle connecting end, and the outer peripheral surface of the arc screw thread end is provided with threads.

[0007] The front end outer sleeve tube is connected with the other end of the middle connecting end, the front end outer sleeve tube is provided with a traction line, one end of the traction line is connected with a shrinkable tube arranged in the front end outer sleeve tube, the other end of the traction line is connected with the arc screw thread end through the wire passing hole of the connecting section, and the shrinkable tube is matched with the front end outer sleeve tube.

[0008] Optionally, two hinged shafts are arranged on the end face of the connecting section, the hinged shafts include a round head and a connecting part, and the round head is connected with the end face of the connecting section through the connecting part.

[0009] Optionally, a hinge hole is centrally formed on the other end face of the connecting segment, the two ends of the hinge hole communicate with the outside of the connecting segment, the hinge hole comprises a round hole part and a strip hole part, the round hole part communicates with the outside of the end face of the connecting segment through the strip hole part, the round hole part is rotationally matched with the round head part, and the axial length of the connecting part is greater than the axial length of the strip hole part.

[0010] Optionally, four wire passing holes are uniformly arranged on the connecting segment, and the traction wire is arranged in each wire passing hole.

[0011] Optionally, a connecting hole is arranged at the threaded end of the arc screw, and the connecting hole is clamped and matched with the hinge shaft.

[0012] Optionally, a connecting block is arranged at one end of the front end sleeve pipe, and the connecting block is clamped and matched with the hinge hole.

[0013] Optionally, a plurality of locking blocks are circumferentially and interval arranged at the other end of the front end sleeve pipe, and a locking hole is formed between adjacent locking blocks.

[0014] Optionally, a threaded section is arranged at one end of the inner shrink tube, the other end of the inner shrink tube is provided with a pin hole, a detachable pin is arranged on the pin hole, and the two ends of the pin are clamped and matched with the locking hole.

[0015] Optionally, an inner hexagonal hole is arranged at the middle part of the other end of the inner shrink tube.

[0016] Optionally, the traction wire is a metal wire.

[0017] The self-locking arc-shaped nail has the advantages that: the arc-shaped nail is connected with a plurality of connecting segments in a hinged mode, so that the middle part of the arc-shaped nail can rotate freely, the arc-shaped nail can rotate and advance along a curved path in an arc-shaped channel, the metal wire can be tightened by rotating the inner locking tube after the arc-shaped nail reaches a preset position, the arc-shaped nail can be fixed in a curved state, the fixing demand after the pelvic fracture is reset is better met, the actual situation of the irregular shape of the pelvis is better met, trauma can be reduced, penetration of the cortical bone can be avoided, and the difficulty of planning and placing the bone nail is reduced.

[0018] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the figures, and in which:

[0020] Figure 1 A structure diagram of a self-locking arc-shaped nail is shown according to one embodiment of the present application.

[0021] Figure 2 A cross-sectional view of A-A of Figure 1 is shown.

[0022] Figure 3 A cross-sectional view of B-B of Figure 1 is shown.

[0023] Figure 4 An enlarged view of C of Figure 3 is shown.

[0024] Figure 5 A cross-sectional view of D-D of Figure 4 is shown.

[0025] Figure 6 A structure diagram of a connecting joint is shown according to one embodiment of the present application.

[0026] Explanation of reference signs:

[0027] 1, connecting joint; 101, hinged shaft; 102, hinged hole; 103, wire passing hole; 104, round head; 105, connecting part; 2, arc screw threaded end; 3, front end sleeve; 301, locking block; 302, locking hole; 4, metal wire; 5, inner shrink tube; 501, pin; 502, inner hexagonal hole. DETAILED DESCRIPTION

[0028] Preferred embodiments of the present application will be described in more detail below. Although the following describes preferred embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thorough and complete, and so that the scope of the present application is fully conveyed to those skilled in the art.

[0029] The present application provides a self-locking arc-shaped nail, comprising:

[0030] The middle connecting end comprises a plurality of connecting segments, and a hinge shaft and a hinge hole are arranged at the axial head and tail of the connecting segment respectively, the arrangement direction of the hinge shaft and the hinge hole is perpendicular to each other, a wire passing hole is arranged through the connecting segment in the axial direction, all the connecting segments are sequentially connected to form the middle connecting end, and the wire passing hole of each connecting segment in the middle connecting end is correspondingly arranged;

[0031] The arc screw threaded end is connected with one end of the middle connecting end, and a thread is arranged on the outer peripheral surface of the arc screw threaded end;

[0032] The front end sleeve pipe is connected with the other end of the middle connecting end, the front end sleeve pipe is internally provided with a traction line, one end of the traction line is connected with an internal shrinkable pipe arranged in the front end sleeve pipe, the other end of the traction line is connected with the arc screw threaded end through the wire passing hole of the connecting segment, and the internal shrinkable pipe is matched with the front end sleeve pipe.

[0033] Specifically, the arc-shaped nail is sequentially provided with the arc screw threaded end, the middle connecting end and the front end sleeve pipe in the order of implanting into a fracture, the arc screw threaded end can be screwed into the reset bone, the connecting segments are hingedly connected to the middle connecting end, the connecting segments can be deformed along the arc-shaped nail channel, the traction line can be pulled tight by rotating the internal shrinkable pipe after the arc-shaped nail is fixed in place, the gap between the connecting segments is eliminated, the arc-shaped nail can be bent and locked in the arc-shaped channel, and finally the front end sleeve pipe and the internal shrinkable pipe are relatively fixed, and the implantation of the arc-shaped nail is completed.

[0034] Optionally, two hinge shafts are correspondingly arranged on the end face of one end of the connecting segment, the hinge shaft comprises a round head part and a connecting part, and the round head part is connected with the end face of the connecting segment through the connecting part.

[0035] Optionally, a hinge hole is arranged in the middle of the end face of the other end of the connecting segment, the hinge hole is communicated with the outside of the connecting segment at both ends, the hinge hole comprises a round hole part and a strip hole part, the round hole part is communicated with the outside of the end face of the connecting segment through the strip hole part, the round hole part is rotationally matched with the round head part, and the axial length of the connecting part is greater than the axial length of the strip hole part.

[0036] Optionally, four wire passing holes are uniformly arranged on the connecting segment, and the wire passing hole is provided with the traction line.

[0037] Specifically, the connecting segments connected in sequence, the gap between the round head part and the round hole part and the gap between the connecting part and the strip hole part, the hinge shaft of one connecting segment can be relatively bent and adjusted with the hinge hole of another connecting segment, the arrangement direction of the hinge shaft is perpendicular to the arrangement direction of the hinge hole, the connecting segment can be bent in any direction, the traction line is arranged in the four wire passing holes, and the separation between the hinge hole and the hinge shaft can be prevented.

[0038] Optionally, the threaded end of the arc screw is provided with a connecting hole, which engages with the hinge shaft.

[0039] Optionally, a connecting block is provided at one end of the front outer sleeve, and the connecting block engages with the hinge hole.

[0040] Specifically, connecting holes and connecting blocks are provided on the threaded end of the arc screw and the front outer sleeve, respectively. This allows the threaded end of the arc screw and the front outer sleeve to be adjusted relative to the middle connecting end. The arc nail is then connected by a snap-fit ​​to form a whole, making it convenient to move the arc nail to the fracture site by screwing in the threaded end of the arc screw.

[0041] Optionally, multiple locking blocks are provided at circumferential intervals at the other end of the front outer sleeve, and locking holes are formed between adjacent locking blocks.

[0042] Optionally, one end of the inner tightening tube is provided with a threaded section, the end of the threaded section near the locking hole is connected to the traction line, and the other end of the inner tightening tube is provided with a pin hole, on which a detachable pin is provided, and the two ends of the pin are engaged with the locking hole.

[0043] Optionally, an internal hexagonal hole is provided in the middle of the other end of the inner tightening tube.

[0044] Optionally, the traction line is made of metal wire.

[0045] Specifically, once the curved nail is moved to the designated position, the internal tightening tube can be rotated using an Allen wrench. This allows the metal wire to be wound around the threaded section, thereby press-fitting the metal wire in the middle connecting end into the gap between the connecting sections. The relative position between the connecting sections is then fixed. When the internal tightening tube cannot be rotated, it indicates that the curved nail has been bent and locked in place. A pin can then be inserted into the internal tightening tube, and the pin simultaneously engages with the locking hole.

[0046] Example

[0047] like Figures 1 to 6 As shown, this utility model provides a self-locking arc-shaped nail, comprising:

[0048] The middle connecting end includes multiple connecting sections 1. The first and last ends of the axial direction of the connecting section 1 are respectively provided with a hinge shaft 101 and a hinge hole 102. The hinge shaft 101 and the hinge hole 102 are perpendicular to each other. The connecting section 1 is provided with a wire hole 103 through it along the axial direction. All the connecting sections 1 are connected end to end in sequence to form the middle connecting end. The wire hole 103 of each connecting section 1 in the middle connecting end is provided accordingly.

[0049] The threaded end 2 of the arc screw is connected to one end of the middle connecting end, and the outer peripheral surface of the threaded end 2 of the arc screw is provided with threads.

[0050] The front end sleeve pipe 3 is connected with the other end of the middle connecting end, and a metal wire 4 is arranged in the front end sleeve pipe 3. One end of the metal wire 4 is connected with an inner shrinkable pipe 5 arranged in the front end sleeve pipe 3, and the other end of the metal wire 4 is connected with the arc screw threaded end 2 through the wire hole 103 of the connecting joint 1. The inner shrinkable pipe 5 cooperates with the front end sleeve pipe 3.

[0051] In the embodiment, two hinge shafts 101 are arranged on the end face of one end of the connecting joint 1 correspondingly. The hinge shaft 101 comprises a round head part 104 and a connecting part 105. The round head part 104 is connected with the end face of the connecting joint 1 through the connecting part 105.

[0052] In the embodiment, a hinge hole 102 is arranged on the end face of the other end of the connecting joint 1 centrally. The two ends of the hinge hole 102 communicate with the outside of the connecting joint 1. The hinge hole 102 comprises a round hole part and a strip hole part. The round hole part communicates with the outside of the end face of the connecting joint 1 through the strip hole part. The round hole part is rotationally matched with the round head part 104. The axial length of the connecting part 105 is greater than the axial length of the strip hole part.

[0053] In the embodiment, four wire holes 103 are uniformly arranged on the connecting joint 1. Each wire hole 103 is arranged with a metal wire 4.

[0054] In the embodiment, the end of the arc screw threaded end 2 is provided with a connecting hole. The connecting hole is clamped and matched with the hinge shaft 101.

[0055] In the embodiment, one end of the front end sleeve pipe 3 is provided with a connecting block. The connecting block is clamped and matched with the hinge hole 102.

[0056] In the embodiment, the other end of the front end sleeve pipe 3 is provided with a plurality of locking blocks 301 along the circumference. The locking holes 302 are formed between the adjacent locking blocks 301.

[0057] In the embodiment, one end of the inner shrinkable pipe 5 is provided with a threaded section. The end of the threaded section close to the locking hole 302 is connected with the metal wire 4. The other end of the inner shrinkable pipe 5 is provided with a pin hole. A detachable pin 501 is arranged on the pin hole. The two ends of the pin 501 are clamped and matched with the locking hole 302.

[0058] In the embodiment, the middle part of the other end of the inner shrinkable pipe 5 is provided with an inner hexagonal hole 502.

[0059] In summary, when fixing the well-reduced pelvis, the arc screw is first screwed into the pre-planned arc-shaped channel through the threaded end 2, driving the connecting joint 1 and the front end sleeve tube 3 of the arc-shaped nail to enter along the arc-shaped channel, the front end sleeve tube 3 and the threaded end 2 of the arc-shaped nail form an axial compression force extending along the arc-shaped nail body, thereby tensioning the fractured pelvis, when the threaded end 2 of the arc screw reaches the planned position, the rotation of the inner shrinkage tube 5 realizes the interference compression of the metal rope 4, thereby realizing the curved fixation of the arc-shaped nail.

[0060] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A self-locking arcuate staple comprising: The utility model relates to a kind of arc screw thread end, and the utility model discloses a kind of arc screw thread end, which is connected with the one end of the middle connecting end, and the outer peripheral surface of the arc screw thread end is provided with thread. The other end of the middle connecting end is connected with the front end sleeve tube, the front end sleeve tube is provided with traction line in, one end of the traction line is connected with the inner shrink tube of being arranged in the front end sleeve tube, the other end of the traction line is connected with the arc screw thread end by being penetrated in the through line hole of the connecting section, and the inner shrink tube cooperates with the front end sleeve tube. Two hinging shafts are correspondingly arranged on the end face of one end of the connecting section, and the hinging shaft includes a round head and a connecting part. A hinging hole is centrally arranged on the end face of the other end of the connecting section, and the hinging hole is communicated with the outside of the connecting section at both ends.

2. The self-locking arcuate staple of Claim 1, wherein, Four through line holes are uniformly arranged on the connecting section, and the traction line is arranged in each through line hole.

3. The self-locking arcuate staple of Claim 2, wherein, The end of the arc screw thread end is provided with a connecting hole, and the connecting hole is snap-fitted with the hinging shaft.

4. The self-locking arcuate staple of Claim 3, wherein, One end of the front end sleeve tube is provided with a connecting block, and the connecting block is snap-fitted with the hinging hole.

5. The self-locking arcuate staple of claim 1, wherein, The other end of the front end sleeve tube is circumferentially and intervaliy provided with a plurality of locking blocks, and a locking hole is formed between adjacent locking blocks.

6. The self-locking arcuate staple of claim 1, wherein, One end of the inner shrink tube is provided with a threaded section, and the other end of the inner shrink tube is provided with a pin hole.

7. The self-locking arcuate staple of claim 6, wherein, The other end of the inner shrink tube is provided with an internal hexagonal hole in the middle.

8. The self-locking arcuate staple of claim 7, wherein, The traction line is a metal wire.

9. The self-locking arcuate staple of claim 8, wherein, ​ 10. The self-locking arcuate staple of claim 1, wherein, ​

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