Distraction device for lower limb fractures

Abstract

The application provides a lower limb fracture distraction device, which comprises a first support part and a first support rod hingedly connected, a second support part and a second support rod hingedly connected, an angle adjusting structure arranged between the first support part and the second support part and capable of adjusting the included angle between the first support part and the second support part, a first connecting piece connected with the first support part, a second connecting piece connected with the second support part, a synchronizing piece arranged on the first connecting piece and capable of rotating relative to the first connecting piece or being locked relative to the first connecting piece, a first locking piece connected with the first connecting piece and capable of locking the synchronizing piece, the second connecting piece being movably arranged on the synchronizing piece in a direction perpendicular to the rotation axis of the synchronizing piece, and a second locking piece capable of locking the second connecting piece and the synchronizing piece. The technical scheme of the application effectively solves the problem of large operation difficulty of the lower limb fracture distraction device in the related art.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a traction device for lower limb fractures. Background Technology

[0002] In lower limb surgeries, leg braces are used to position and stabilize the patient's legs, while also opening the joints. External traction widens the joint space, facilitating surgical manipulation or improving joint mobility.

[0003] In related technologies, the thigh support and the calf support are controlled independently, meaning that the swing angles of the thigh support and the calf support are controlled independently. This makes the operation more difficult and makes it difficult to fix and spread the lower limb joints. Summary of the Invention

[0004] The main objective of this invention is to provide a traction device for lower limb fractures, thereby solving the problem of the high operational difficulty of traction devices for lower limb fractures in related technologies.

[0005] To achieve the above objectives, the present invention provides a traction device for lower limb fractures, comprising: a first support structure, the first support structure including a first support rod and a first support portion, the first support portion being hingedly connected to the first support rod; a second support structure, the second support structure including a second support rod and a second support portion, the second support portion being hingedly connected to the second support rod; and an angle adjustment structure disposed between the first support portion and the second support portion and capable of adjusting the included angle between the first support portion and the second support portion, the angle adjustment structure including a first connector, a second connector, a first locking member, a second locking member, and a synchronizing member, the first connector being connected to the first support portion, the second connector being connected to the second support portion, the synchronizing member being disposed on the first connector and capable of rotating relative to the first connector or locking relative to the first connector, the first locking member being connected to the first connector and capable of locking the synchronizing member, the second connector being movably disposed on the synchronizing member along a direction perpendicular to the rotation axis of the synchronizing member, and the second locking member being capable of locking the second connector and the synchronizing member; wherein, when the synchronizing member rotates relative to the first connector, the second connector can move relative to the synchronizing member to adjust the included angle between the first support portion and the second support portion.

[0006] Furthermore, the synchronizing member includes a first mating part and a second mating part that are connected to each other. The first mating part mates with the first connecting member. The second mating part is provided with a sliding groove that extends in a direction perpendicular to the rotation axis of the synchronizing member. The second connecting member is movably inserted into the sliding groove along the extension direction of the sliding groove. The second locking member is connected to the second connecting member and can lock the second connecting member at any position in the sliding groove.

[0007] Furthermore, the first mating part includes a cylindrical part and a first end face tooth disposed on the cylindrical part, and the first connecting member includes a first connecting rod, a disc part and a second end face tooth. The disc part is disposed on the first connecting rod, and the second end face tooth is disposed on the disc part. The first end face tooth and the second end face tooth are meshed together.

[0008] Furthermore, the first locking element includes a first bolt, a first threaded hole is provided in the first connecting rod, and the first bolt passes through the first mating part and is connected to the first threaded hole.

[0009] Furthermore, the second mating part is provided with a first limiting tooth surface on the side away from the second support part, the second locking member includes a second bolt and a first locking block, the first locking block is provided with a second limiting tooth surface, the first locking block passes through the second bolt, the second connecting member is provided with a second threaded hole, and the second bolt is connected to the second threaded hole.

[0010] Furthermore, the second mating part is provided with a receiving space, which is connected to the slide groove. A friction-reducing structure is provided in the receiving space, which is located on at least one side of the second connector and engages with the second connector to reduce friction.

[0011] Furthermore, the friction-reducing structure includes multiple rolling shafts arranged in two rows at intervals, with the friction-reducing structure positioned between the two rows of rolling shafts.

[0012] Furthermore, the second connecting member includes a second connecting rod and a third connecting rod. The second connecting rod is fixedly connected to the second support part. A connecting hole is provided on the second connecting rod. The third connecting rod is inserted into the connecting hole and can move along the axial direction of the connecting hole. A second threaded hole is provided on the third connecting rod. The second connecting rod and the third connecting rod are anti-rotationally engaged.

[0013] Furthermore, the second connecting rod is provided with a strip-shaped hole extending along the axial direction of the second connecting rod, and the synchronizing element also includes a screw, which is inserted into the strip-shaped hole and connected to the third connecting rod.

[0014] Furthermore, the first support part and the first support rod are hinged together by a first hinge axis, and the second support part and the second support rod are hinged together by a second hinge axis. An angle adjustment structure is disposed between the first hinge axis and the second hinge axis. Alternatively, the lower limb fracture traction device also includes a footrest structure, which includes a footrest part and a second locking block. The footrest part is hinged to the second locking block. The second locking block includes a first locking block, a second locking block, a ball-head component, and a third locking component. The first locking block has a first hemispherical cavity on the side facing the second locking block, and the second locking block has a second hemispherical cavity on the side facing the first locking block. The ball-head component... The device includes a ball head and an extension. The ball head is located between the first and second hemispherical cavities. The extension is hinged to the foot support. The first locking block and the second locking block are hinged together. A third locking element is connected between the first and second locking blocks. The lower limb fracture traction device also includes a first fixing part with a first slot. A first support rod is detachably connected to the first fixing part. The lower limb fracture traction device also includes a second fixing part, which includes a support frame and a clamping structure. The support frame is movably mounted on the clamping structure, and the second support rod and the foot support structure are movably mounted on the support frame.

[0015] Applying the technical solution of this invention, the first support part is hingedly connected to the first support rod, and the second support part is hingedly connected to the second support rod. An angle adjustment structure is disposed between the first and second support parts and can adjust the included angle between them. The angle adjustment structure includes a first connecting member, a second connecting member, a first locking member, a second locking member, and a synchronizing member. The first connecting member is connected to the first support part, the second connecting member is connected to the second support part, and the synchronizing member is disposed on the first connecting member and can rotate or lock relative to it. The first locking member is connected to the first connecting member and can lock the synchronizing member. The second connecting member is movably disposed on the synchronizing member along a direction perpendicular to the rotation axis of the synchronizing member, and the second locking member can lock the second connecting member and the synchronizing member. With the above configuration, the first support part can support the thigh portion, and the second support part can support the calf portion. When the synchronizing member rotates relative to the first connecting member, the second connecting member can move relative to the synchronizing member, thereby adjusting the angle between the first and second supporting parts. In other words, the synchronizing member ensures that the angles of the first and second supporting parts are adjusted simultaneously, thus achieving angle adjustment. Then, the synchronizing member and the first connecting member are locked by the first locking member, and the synchronizing member and the second connecting member are locked by the second locking member, thereby fixing the angle between the first and second supporting parts. This design makes adjusting the angle between the first and second supporting parts relatively easy. Therefore, the technical solution of this application effectively solves the problem of the high operational difficulty of lower limb fracture traction devices in related technologies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the lower limb fracture traction device according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A two-dimensional structural diagram of a traction device for lower limb fractures from a second perspective;

[0019] Figure 3 It shows Figure 1 A three-dimensional structural diagram of a lower limb fracture traction device from a third-person perspective;

[0020] Figure 4 It shows Figure 1 A schematic diagram of the exploded structure of a traction device for lower limb fractures;

[0021] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the first support structure, the second support structure, and the angle adjustment structure of the lower limb fracture traction device;

[0022] Figure 6 It shows Figure 5 A three-dimensional structural diagram of the first support structure, the second support structure, and the angle adjustment structure from another perspective;

[0023] Figure 7 It shows Figure 5 A top view of the first support structure, the second support structure, and the angle adjustment structure;

[0024] Figure 8 It shows Figure 7 A schematic diagram of the first support structure, the second support structure, and the angle adjustment structure in section AA.

[0025] Figure 9 It shows Figure 7 A BB-direction cross-sectional view of the first support structure, the second support structure, and the angle adjustment structure;

[0026] Figure 10 It shows Figure 7 A three-dimensional structural diagram of the first support structure, the second support structure, and the angle adjustment structure;

[0027] Figure 11 It shows Figure 7 A schematic diagram of the exploded structure of the angle adjustment structure;

[0028] Figure 12 It shows Figure 1 A three-dimensional structural diagram of the foot support structure of a traction device for lower limb fractures;

[0029] Figure 13 It shows Figure 12 An exploded view of the footrest structure;

[0030] Figure 14 It shows Figure 12 A schematic diagram of the exploded structure of the footrest from another perspective.

[0031] The above figures include the following reference numerals:

[0032] 10. First support structure; 11. First support rod; 12. First support part; 20. Second support structure; 21. Second support rod; 22. Second support part; 30. Angle adjustment structure; 31. First connector; 311. First connecting rod; 312. Disc body; 313. Second end face tooth; 32. Second connector; 321. Second connecting rod; 3211. Connecting hole; 3212. Strip hole; 322. Third connecting rod; 33. First locking member; 34. Second locking member; 341. Second bolt; 342. First locking block; 3421. Second limiting tooth surface; 35. Same Step component; 351, first mating part; 3511, cylindrical part; 3512, first end face tooth; 352, second mating part; 3521, sliding groove; 3522, first limiting tooth surface; 3523, accommodating space; 3524, friction reduction structure; 35241, rolling shaft; 40, foot support structure; 41, foot support part; 42, second locking block; 421, first locking block; 422, second locking block; 423, ball head; 4231, ball head; 4232, extension part; 424, third locking component; 50, first fixing part; 60, second fixing part; 61, support frame; 62, clamping structure. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] like Figures 1 to 4 As shown, in some embodiments, the lower limb fracture traction device includes: a first support structure 10, a second support structure 20, and an angle adjustment structure 30. The first support structure 10 includes a first support rod 11 and a first support portion 12, the first support portion 12 being hingedly connected to the first support rod 11. The second support structure 20 includes a second support rod 21 and a second support portion 22, the second support portion 22 being hingedly connected to the second support rod 21. An angle adjustment structure 30 is disposed between the first support portion 12 and the second support portion 22 and can adjust the included angle between the first support portion 12 and the second support portion 22. The angle adjustment structure 30 includes a first connecting member 31, a second connecting member 32, a first locking member 33, a second locking member 34, and a synchronizing member 35. The first connecting member 31 is connected to the first support portion 12, and the second connecting member 32 is connected to the second support portion 22. The synchronizing member 35 is disposed on the first connecting member 31 and can rotate or lock relative to the first connecting member 31. The first locking member 33 is connected to the first connecting member 31 and can lock the synchronizing member 35. The second connecting member 32 is movably disposed on the synchronizing member 35 along a direction perpendicular to the rotation axis of the synchronizing member 35. The second locking member 34 can lock the second connecting member 32 and the synchronizing member 35. When the synchronizing member 35 rotates relative to the first connecting member 31, the second connecting member 32 can move relative to the synchronizing member 35 to adjust the included angle between the first support portion 12 and the second support portion 22.

[0037] Using the above technical solution, the first support part 12 is hinged to the first support rod 11, and the second support part 22 is hinged to the second support rod 21. An angle adjustment structure 30 is disposed between the first support part 12 and the second support part 22 and can adjust the included angle between them. The angle adjustment structure 30 includes a first connecting member 31, a second connecting member 32, a first locking member 33, a second locking member 34, and a synchronizing member 35. The first connecting member 31 is connected to the first support part 12, the second connecting member 32 is connected to the second support part 22, and the synchronizing member 35 is disposed on the first connecting member 31 and can rotate or lock relative to it. The first locking member 33 is connected to the first connecting member 31 and can lock the synchronizing member 35. The second connecting member 32 is movably disposed on the synchronizing member 35 along a direction perpendicular to the rotation axis of the synchronizing member 35, and the second locking member 34 can lock the second connecting member 32 and the synchronizing member 35. With the above configuration, the first support part 12 can support the thigh portion, and the second support part 22 can support the lower leg portion. When the synchronizing member 35 rotates relative to the first connecting member 31, the second connecting member 32 can move relative to the synchronizing member 35, thereby adjusting the angle between the first support part 12 and the second support part 22. That is, the synchronizing member 35 can ensure that the first support part 12 and the second support part 22 can be adjusted at the same time, thereby achieving the adjustment of the angle between the first support part 12 and the second support part 22. Then, the first locking member 33 locks the synchronizing member 35 and the first connecting member 31, and the second locking member 34 locks the synchronizing member 35 and the second connecting member 32, thereby fixing the angle between the first support part 12 and the second support part 22. This configuration makes the adjustment of the angle between the first support part 12 and the second support part 22 relatively easy. Therefore, the above technical solution effectively solves the problem of the high operational difficulty of lower limb fracture traction devices in related technologies.

[0038] It should be noted that the aforementioned lower limb fracture distraction device can be placed on the operating table, thereby stabilizing the patient's posture. Preferably, the lower limb fracture distraction device is used to distract the knee joint.

[0039] The first support part 12 has a first support surface, and the second support part 22 has a second support surface.

[0040] The included angle in the phrase “angle adjustment structure 30 is disposed between the first support part 12 and the second support part 22 and can adjust the included angle between the first support part 12 and the second support part 22” refers to the included angle between the first support surface and the second support surface.

[0041] like Figures 4 to 11As shown, in some embodiments, the synchronizing member 35 includes a first mating part 351 and a second mating part 352 connected to each other. The first mating part 351 mates with the first connecting member 31. The second mating part 352 is provided with a sliding groove 3521, which extends in a direction perpendicular to the rotation axis of the synchronizing member 35. The second connecting member 32 is movably inserted into the sliding groove 3521 along the extension direction of the sliding groove 3521. The second locking member 34 is connected to the second connecting member 32 and can lock the second connecting member 32 at any position in the sliding groove 3521. The second connecting member 32 can move within the sliding groove 3521. When the first mating part 351 rotates, the second connecting member 32 can move within the sliding groove 3521. This ensures the adjustment of the angle between the first support part 12 and the second support part 22 and prevents the second connecting member 32 from jamming with the sliding groove 3521. When the first mating part 351 stops rotating, the second connecting part 32 can move within the slide groove 3521, thereby adjusting the distance between the first support part 12 and the second support part 22, and thus adjusting the opening size of the lower limb joint.

[0042] In this embodiment, the lower limb joint mentioned above is the knee joint. Of course, the lower limb joint mentioned above can also be the hip joint, ankle joint, etc.

[0043] like Figures 4 to 11 As shown, in some embodiments, the first mating part 351 includes a cylindrical part 3511 and a first end face tooth 3512 disposed on the cylindrical part 3511. The first connecting member 31 includes a first connecting rod 311, a disc part 312, and a second end face tooth 313. The disc part 312 is disposed on the first connecting rod 311, and the second end face tooth 313 is disposed on the disc part 312. The first end face tooth 3512 and the second end face tooth 313 are engaged. The engagement of the first end face tooth 3512 and the second end face tooth 313 can lock the included angle between the first support part 12 and the second support part 22. When the first end face tooth 3512 and the second end face tooth 313 are separated, the first support part 12 and the second support part 22 can be adjusted in angle.

[0044] like Figures 4 to 11 As shown, in some embodiments, the first locking member 33 includes a first bolt, and the first connecting rod 311 has a first threaded hole. The first bolt passes through the first mating part 351 and is connected to the first threaded hole. The first bolt can be inserted into the first threaded hole, which ensures the locking effect.

[0045] like Figures 4 to 11As shown, in some embodiments, the second mating part 352 has a first limiting tooth surface 3522 on the side away from the second support part 22. The second locking member 34 includes a second bolt 341 and a first locking block 342. The first locking block 342 has a second limiting tooth surface 3421 and passes through the second bolt 341. The second connecting member 32 has a second threaded hole, and the second bolt 341 is connected to the second threaded hole. The second limiting tooth surface 3421 and the first limiting tooth surface 3522 can be engaged, thereby locking the relative position of the second connecting member 32 in the slide groove 3521, and thus ensuring the relative position between the first support part 12 and the second support part 22. When the second bolt 341 is separated from the second threaded hole, the first limiting tooth surface 3522 and the second limiting tooth surface 3421 can separate. When the second bolt 341 is connected and locked to the second threaded hole, the first limiting tooth surface 3522 and the second limiting tooth surface 3421 can engage and achieve position locking.

[0046] like Figures 4 to 11 As shown, in some embodiments, a receiving space 3523 is provided within the second mating part 352. The receiving space 3523 communicates with the slide groove 3521. A friction-reducing structure 3524 is provided within the receiving space 3523, disposed on at least one side of the second connector 32, and engages with the second connector 32 to reduce friction. The provision of the receiving space 3523 facilitates the placement of the friction-reducing structure 3524 and ensures the stability of the position of the friction-reducing structure 3524. At the same time, the provision of the friction-reducing structure 3524 allows the second connector 32 to move more smoothly within the slide groove 3521, preventing jamming.

[0047] like Figures 4 to 11 As shown, in some embodiments, the friction-reducing structure 3524 includes a plurality of rolling shafts 35241, which are arranged in two rows at intervals. The friction-reducing structure 3524 is disposed between the two rows of rolling shafts 35241. The arrangement of the rolling shafts 35241 can reduce the contact area with the second connecting member 32, and since the rolling shafts 35241 rotate, the cooperation between the second connecting member 32 and the rolling shafts 35241 is rolling friction, thus achieving a friction-reducing fit.

[0048] like Figures 4 to 11As shown, in some embodiments, the second connecting member 32 includes a second connecting rod 321 and a third connecting rod 322. The second connecting rod 321 is fixedly connected to the second support portion 22. A connecting hole 3211 is provided on the second connecting rod 321. The third connecting rod 322 is inserted into the connecting hole 3211 and can move along the axial direction of the connecting hole 3211. A second threaded hole is provided on the third connecting rod 322. The second connecting rod 321 and the third connecting rod 322 are anti-rotationally engaged. Since the third connecting rod 322 can move relative to the second connecting rod 321, the first locking block 342 can be moved, thereby enabling the separation and engagement of the first limiting tooth surface 3522 and the second limiting tooth surface 3421.

[0049] like Figures 4 to 11 As shown, in some embodiments, the second connecting rod 321 is provided with a strip-shaped hole 3212 extending along the axial direction of the second connecting rod 321. The synchronizing element 35 also includes a screw, which is inserted into the strip-shaped hole 3212 and connected to the third connecting rod 322. This arrangement prevents the second connecting rod 321 and the third connecting rod 322 from separating; that is, the second connecting rod 321 can move along the direction of the strip-shaped hole 3212 and can be engaged by the screw, thereby achieving relative movement between the second connecting rod 321 and the third connecting rod 322. In other words, the arrangement of the screw being inserted into the strip-shaped hole 3212 and connected to the third connecting rod 322 restricts relative rotation between the second connecting rod 321 and the third connecting rod 322, thereby achieving an anti-rotation engagement between the second connecting rod 321 and the third connecting rod 322.

[0050] Furthermore, a tension spring is provided between the second connecting rod 321 and the third connecting rod 322, which allows the second connecting rod 321 and the third connecting rod 322 to move closer to each other. When the user pulls the second bolt, it can drive the third connecting rod 322 to move and cause the tension spring to stretch. When the user releases the tension spring, the first limiting tooth surface 3522 and the second limiting tooth surface 3421 can engage under the action of the tension spring.

[0051] like Figures 4 to 11 As shown, in some embodiments, the first support portion 12 and the first support rod 11 are hinged together by a first hinge axis, and the second support portion 22 and the second support rod 21 are hinged together by a second hinge axis. An angle adjustment structure 30 is disposed between the first hinge axis and the second hinge axis. This arrangement ensures the adjustment of the angles of the first support portion 12 and the second support portion 22.

[0052] like Figures 1 to 4 as well as Figures 11 to 14As shown, in some embodiments, the lower limb fracture traction device further includes a foot support structure 40, which includes a foot support portion 41 and a second locking block 42. The foot support portion 41 is hinged to the second locking block 42. The second locking block 42 includes a first locking block 421, a second locking block 422, a ball head member 423, and a third locking member 424. The first locking block 421 has a first hemispherical cavity on the side facing the second locking block 422, and the second locking block 422 has a second hemispherical cavity on the side facing the first locking block 421. The ball head member 423 includes a ball head 4231 and an extension portion 4232. The ball head 4231 is located between the first hemispherical cavity and the second hemispherical cavity. The extension portion 4232 is hinged to the foot support portion 41. The first locking block 421 and the second locking block 422 are hinged together, and the third locking member 424 is connected between the first locking block 421 and the second locking block 422. The ball head 4231 can be clamped within the first and second hemispherical cavities. When the first locking block 421 and the second locking block 422 are connected via the third locking member 424, the ball head 4231 can be clamped by the first and second locking blocks 421 and 422. When the third locking member 424 is released, the ball head 4231 can rotate or swing within the first and second locking blocks 421 and 422. When locked by the third locking member 424, the position of the ball head 4231 is relatively stable, and the footrest 41 can be fixed. At the same time, the ball head 4231 and the extension 4232 are hinged, which allows for adjustment of the angle of the footrest 41.

[0053] Specifically, the first locking block 421 and the second locking block 422 are hinged together.

[0054] like Figures 1 to 4 as well as Figures 11 to 14 As shown, in some embodiments, the lower limb fracture traction device further includes a first fixing part 50, which has a first slot. The first support rod 11 is detachably connected to the first fixing part 50. The first fixing part 50 enables the first support structure 10 to be fixed on the operating table. Specifically, the first fixing part 50 includes a locking block, a rotation adjustment part, a fourth locking member, and a fifth locking member. The locking block has a slot that engages with the operating table. The fourth locking member is connected to the locking block and engages with the operating table, thereby fixing the first support structure 10 on the operating table. The rotation adjustment part is rotatably disposed on the side of the locking block. The rotation axis of the rotation adjustment part is perpendicular to the axis of the first support rod 11 and the length direction of the operating table. The fifth locking member locks the rotation adjustment part and the locking block. The first support rod 11 is disposed on the rotation adjustment part. When the fifth locking member is released, the rotation adjustment part can rotate, thereby allowing the first support rod 11 to swing. When locked by the fifth locking member, the position of the first support rod 11 is fixed.

[0055] like Figures 1 to 4 as well as Figures 11 to 14 As shown, in some embodiments, the lower limb fracture traction device further includes a second fixation part 60. The second fixation part 60 includes a support frame 61 and a clamping structure 62. The support frame 61 is movably mounted on the clamping structure 62, and the second support rod 21 and the foot support structure 40 are movably mounted on the support frame 61. The support frame 61 includes a slide rail, a first limiting block, a second limiting block, and a plug-in block. The first limiting block is provided with a clearance groove, and the second limiting block is provided with multiple plug-in holes spaced apart along the height direction. The slide rail is located on the top of the second limiting block, the clamping structure is connected to the first limiting block, the second limiting block is movably mounted in the clearance groove along the height direction, and the plug-in block can be inserted into the plug-in hole and connected to the first limiting block, thus enabling adjustment of the slide rail height. The second support structure 20 and the foot support structure 40 are both movably mounted on the slide rail, thus enabling adjustment of the distance between the second support structure 20 and the foot support structure 40.

[0056] Specifically, the first support part 12 is provided with a first positioning structure, the second support part 22 is provided with a second positioning structure, and the foot support structure 40 is provided with a third positioning structure. The first support part 12 has a first elongated hole on its side, the second support part 22 has a second elongated hole, and the foot support structure 40 has a third elongated hole. The first positioning structure is movably positioned at the first elongated hole, the second positioning structure is movably positioned at the second elongated hole, and the third positioning structure is movably positioned at the third elongated hole. The first positioning structure has multiple positioning holes, into which Kirschner wires can be selectively inserted. The second and third positioning structures have the same structure as the first positioning structure.

[0057] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A traction device for lower limb fractures, characterized in that, include: The first support structure (10) includes a first support rod (11) and a first support part (12), wherein the first support part (12) is hinged to the first support rod (11); The second support structure (20) includes a second support rod (21) and a second support part (22), and the second support part (22) is hinged to the second support rod (21); An angle adjustment structure (30) is disposed between the first support part (12) and the second support part (22) and is capable of adjusting the included angle between the first support part (12) and the second support part (22). The angle adjustment structure (30) includes a first connector (31), a second connector (32), a first locking member (33), a second locking member (34), and a synchronizing member (35). The first connector (31) is connected to the first support part (12), and the second connector (32) is connected to the second support part (22). The synchronizing element (35) is disposed on the first connecting element (31) and can rotate relative to the first connecting element (31) or lock relative to the first connecting element (31). The first locking element (33) is connected to the first connecting element (31) and can lock the synchronizing element (35). The second connecting element (32) is movably disposed on the synchronizing element (35) in a direction perpendicular to the rotation axis of the synchronizing element (35). The second locking element (34) can lock the second connecting element (32) and the synchronizing element (35). When the synchronizing member (35) rotates relative to the first connecting member (31), the second connecting member (32) can move relative to the synchronizing member (35) to adjust the included angle between the first support (12) and the second support (22).

2. The lower limb fracture distraction device according to claim 1, characterized in that, The synchronizing member (35) includes a first mating part (351) and a second mating part (352) connected to each other. The first mating part (351) is mated with the first connecting member (31). The second mating part (352) is provided with a sliding groove (3521). The sliding groove (3521) extends in a direction perpendicular to the rotation axis of the synchronizing member (35). The second connecting member (32) is movably inserted into the sliding groove (3521) along the extension direction of the sliding groove (3521). The second locking member (34) is connected to the second connecting member (32) and can lock the second connecting member (32) at any position in the sliding groove (3521).

3. The lower limb fracture traction device according to claim 2, characterized in that, The first mating part (351) includes a cylindrical part (3511) and a first end face tooth (3512) disposed on the cylindrical part (3511). The first connecting member (31) includes a first connecting rod (311), a disc part (312) and a second end face tooth (313). The disc part (312) is disposed on the first connecting rod (311), and the second end face tooth (313) is disposed on the disc part (312). The first end face tooth (3512) and the second end face tooth (313) are engaged.

4. The lower limb fracture traction device according to claim 3, characterized in that, The first locking member (33) includes a first bolt, and the first connecting rod (311) has a first threaded hole. The first bolt passes through the first mating part (351) and is connected to the first threaded hole.

5. The lower limb fracture traction device according to claim 2, characterized in that, The second mating part (352) is provided with a first limiting tooth surface (3522) on the side away from the second support part (22). The second locking member (34) includes a second bolt (341) and a first locking block (342). The first locking block (342) is provided with a second limiting tooth surface (3421). The first locking block (342) passes through the second bolt (341). The second connecting member (32) is provided with a second threaded hole. The second bolt (341) is connected to the second threaded hole.

6. The lower limb fracture traction device according to claim 2, characterized in that, The second mating part (352) is provided with a receiving space (3523), the receiving space (3523) is connected to the slide groove (3521), the receiving space (3523) is provided with a friction-reducing structure (3524), the friction-reducing structure (3524) is provided on at least one side of the second connector (32) and is in friction-reducing cooperation with the second connector (32).

7. The lower limb fracture traction device according to claim 6, characterized in that, The friction-reducing structure (3524) includes multiple rolling shafts (35241), which are arranged in two rows at intervals. The friction-reducing structure (3524) is disposed between the two rows of rolling shafts (35241).

8. The lower limb fracture traction device according to claim 5, characterized in that, The second connecting member (32) includes a second connecting rod (321) and a third connecting rod (322). The second connecting rod (321) is fixedly connected to the second support part (22). A connecting hole (3211) is provided on the second connecting rod (3211). The third connecting rod (322) is inserted into the connecting hole (3211) and can move along the axial direction of the connecting hole (3211). The second threaded hole is provided on the third connecting rod (322). The second connecting rod (321) and the third connecting rod (322) are anti-rotationally engaged.

9. The lower limb fracture traction device according to claim 8, characterized in that, The second connecting rod (321) is provided with a strip hole (3212) extending along the axial direction of the second connecting rod (321). The synchronizing element (35) also includes a screw, which is inserted into the strip hole (3212) and connected to the third connecting rod (322).

10. The lower limb fracture traction device according to any one of claims 1 to 9, characterized in that, The first support part (12) and the first support rod (11) are hinged together by a first hinge axis, and the second support part (22) and the second support rod (21) are hinged together by a second hinge axis. The angle adjustment structure (30) is disposed between the first hinge axis and the second hinge axis. Alternatively, the lower limb fracture traction device further includes a foot support structure (40). The foot support structure (40) includes a foot support part (41) and a second locking block (42). The foot support part (41) is hinged to the second locking block (42). The second locking block (42) includes a first locking block (421), a second locking block (422), a ball head (423), and a third locking member (424). The first locking block (421) has a first hemispherical cavity on the side facing the second locking block (422), and the second locking block (422) has a second hemispherical cavity on the side facing the first locking block (421). The ball head (423) includes a ball head (4231) and a... The extension (4232) and the ball head (4231) are located between the first hemispherical cavity and the second hemispherical cavity. The extension (4232) is hinged to the foot support (41). The first locking block (421) and the second locking block (422) are hinged to each other. The third locking member (424) is connected between the first locking block (421) and the second locking block (422). The lower limb fracture traction device also includes a first fixing part (50). The first fixing part (50) is provided with a first slot. The first support rod (11) is detachably connected to the first fixing part (50). The lower limb fracture traction device also includes a second fixing part (60). The second fixing part (60) includes a support frame (61) and a clamping structure (62). The support frame (61) is movably disposed on the clamping structure (62). The second support rod (21) and the foot support structure (40) are movably disposed on the support frame (61).

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