A multi-directional traction frame for closed reduction of tibial fracture

Abstract

The invention discloses a multi-directional traction frame for closed reduction of tibial fracture, comprising a base plate with a load-bearing function, and the base plate is fixed to an external device through mounting holes at four corners, wherein sliding grooves are provided at both ends of the inner part of the base plate, and a sliding block is slidably connected inside each sliding groove, and the upper sides of the two sliding blocks are rotatably connected to a first support plate and a second support plate respectively, and the upper sides of the first support plate and the second support plate are rotatably connected through hinges, and a plurality of clamping grooves are provided on a fixing rod, and a movable block is movably clamped inside the clamping groove, and the movable block is rotatably connected to a first connecting rod, a second connecting rod, and a supporting plate in sequence, and a rotating knob is rotatably connected inside the supporting plate, and a clamping rod is meshedly connected with the center of the rotating knob, and the present invention can be fixed at any position by any rotation of the first and second connecting rods and by rotating the second screw, and the angle of the supporting plate can be universally adjusted, so that the clamping rod can be displaced laterally, frontally, and rearwardly, thereby achieving effective traction of multiple fractures.

Description

Technical Field

[0001] The invention relates to the technical field of reduction and traction, in particular to a multi-directional traction frame for closed reduction of tibial fractures. Background Art

[0002] Tibial fracture is a common fracture in clinical practice. Surgical reduction of tibial fracture is often difficult, especially for multi-segment comminuted fractures. The fracture fragments are displaced in multiple directions. Closed reduction is often difficult and open reduction is often required. Open reduction causes greater trauma, disrupts blood supply to the fracture ends, and causes nonunion of fractures. In the past, there were fracture distractors in clinical practice, but they were often only uniaxial longitudinal traction. For complex multi-segment fractures, they are often accompanied by shortening, lateral and anterior-posterior displacement, and it is difficult to perfectly reduce them by relying solely on axial traction. During treatment, the treatment of tibial fractures is more troublesome, which affects the efficiency of surgical treatment and is not conducive to the patient's recovery. Therefore, we proposed a multi-directional traction frame for closed reduction of tibial fractures. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-directional traction frame for closed reduction of tibial fractures to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-directional traction frame for closed reduction of tibial fractures, comprising a bottom plate with a load-bearing function, and the bottom plate is fixed to an external device through mounting holes at four corners, both ends of the bottom plate are provided with slide grooves, each slide groove is slidably connected to a slider, each slide groove is rotatably connected to a lead screw, and the lead screw is meshedly connected to the slider, the right end of the lead screw located inside the right slide groove penetrates the side wall of the slide groove and extends to the outside of the bottom plate and is connected to a rotary handle, both ends of the upper sides of the two sliders penetrate the top wall of the slide groove and are rotatably connected to a first support plate and a second support plate respectively, and the upper sides of the first support plate and the second support plate are rotatably connected through hinges;

[0005] A plurality of movable blocks are movably connected to one side of the first support plate, and the movable blocks are connected to a support plate through a universal structure. A knob is rotatably connected inside the support plate, and a clamping rod is meshedly connected to the center of the knob.

[0006] Preferably, the inner end of the lead screw is fixedly sleeved with a first gear, one side of the first gear and located inside the base plate is slidably connected to a top block through a first spring, the top block is rotatably connected to a second gear, and both ends of the second gear are respectively movably engaged with the two first gears, and the side of the top block away from the second gear is movably connected to a first screw rod, the outer end of the first screw rod passes through the side wall of the base plate and extends to the outside thereof and is connected to a rotary handle.

[0007] Preferably, a moving block is movably connected to the upper surface of the base plate and located at the right end of the first support plate, the lower side of the moving block penetrates the side wall of the base plate and extends to the interior of the slide groove and is meshed and sleeved on the lead screw, the left interior of the moving block is slidably connected to an adjusting block via a second spring, a dial is fixedly connected to the right upper end surface of the moving block, a pointing shaft is rotatably connected to the center position of the dial, a torsion spring is provided at the lower end of the pointing shaft, a pull rope is wound around the middle of the pointing shaft, and the outer end of the pull rope is connected to the side wall of the adjusting block, and the left side of the adjusting block is connected to a traction device via a steel wire rope.

[0008] Preferably, a fixing rod is fixedly connected to one side of the first supporting plate, a plurality of slots are formed on the outer side wall of the fixing rod, and a movable block is movably connected to the interior of the slot via a pre-tightening block.

[0009] Preferably, the universal structure includes a ball head fixedly connected to the movable block, the outside of the ball head is rotatably connected to the first connecting rod in a wrapped form, the top end of the first connecting rod is rotatably connected to the left end of the second connecting rod, and the top end of the first connecting rod and the left end of the second connecting rod are both sleeved on the outside of the second screw, and the end of the second connecting rod away from the second screw is also rotatably connected to the supporting plate through the form of a ball head, and the inside of the first connecting rod and the second connecting rod are both slidably connected with an extrusion rod, one end of the extrusion rod is movably engaged with the ball head, and the other end is movably engaged with the inside of an annular groove, and the annular groove is opened on the side wall of the second screw.

[0010] Preferably, the number of the annular grooves is two and they correspond to the ends of the two extrusion rods respectively, the side wall of the annular groove is an arc-shaped surface and matches with the ends of the extrusion rods, and the end of the second screw rod is meshingly connected with the end of the second connecting rod.

[0011] Preferably, a plurality of inserting pieces are provided at one end of the extrusion rod close to the ball head, and the extrusion rod is movably engaged with the ball head via the inserting pieces.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: when the second gear of the present invention is meshed with the two first gears, the first and second support plates can be slid on the bottom plate by rotating the lead screw, so that the first and second support plates can be moved to a reasonable position of the patient's leg. When the second gear is disengaged from the two first gears, only the lead screw on the right side can be rotated at this time, so that the lower side of the first support plate slides, so that the angle between the first support plate and the second support plate becomes smaller, and can be rotated to an angle even smaller than the vertical angle, so that the patient's knee bends more, making it more convenient to perform minimally invasive implantation of Schanz pins from the patient's knee; by arbitrarily rotating the first and second connecting rods and fixing the second screw rod at any position by rotating it, the angle of the support plate can be arbitrarily changed and then fixed, so that the angle of the clamping rod can be arbitrarily adjusted, so that the clamping rod can be displaced laterally and frontally, and then effective traction is achieved for multiple fractures; and the reduction of the fracture first requires the restoration of the length, and the device is fixed to the calcaneus through the traction device to traction the fracture in the long axis direction, and then the length problem can be partially or completely restored, and a device for measuring the pulling force is provided at the traction position in the long axis direction, so that the traction force can be better controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a cross-sectional view of the bottom plate, the slide groove and the slider of the present invention;

[0015] Figure 3 For the present invention Figure 2 A magnified image of point A;

[0016] Figure 4 It is a cross-sectional view of the bottom plate, the lead screw and the slider of the present invention;

[0017] Figure 5 An exploded view of the first connecting rod, the second connecting rod and the second screw rod of the present invention;

[0018] Figure 6 It is a cross-sectional view of the support plate, the knob and the clamping rod of the present invention;

[0019] Figure 7 It is a cross-sectional view of the moving block and the adjusting block of the present invention;

[0020] Figure 8 It is a structural schematic diagram of the moving block and the first supporting plate of the present invention;

[0021] Fig. 9 It is a cross-sectional view of the top block and the first screw rod of the present invention;

[0022] Fig.10 It is a schematic structural diagram of the clamping rod of the present invention.

[0023] Fig.11 It is a cross-sectional view showing the change in the connection position of the first connecting rod, the second connecting rod and the second screw rod of the present invention.

[0024] Fig.12 This is an intraoperative X-ray of a patient's leg fracture;

[0025] Fig.13 This is an X-ray of a patient's leg fracture being reduced using a plate during surgery;

[0026] Fig.14 This is an X-ray of a patient's leg fracture being reduced using a Schanz pin during surgery.

[0027] In the figure: 1, bottom plate, 2, slide groove, 3, slider, 4, first support plate, 5, second support plate, 6, hinge, 7, screw, 8, first gear, 9, top block, 10, first spring, 11, first screw, 12, fixed rod, 13, slot, 14, preload block, 15, movable block, 16, ball head, 17, first connecting rod, 18, second connecting rod, 19, supporting plate, 20, knob, 21, clamping rod, 22, second screw, 23, ring groove, 24, moving block, 25, adjusting block, 26, second spring, 27, pull rope, 28, pointing axis, 29, dial, 30, torsion spring, 31, extrusion rod, 32, second gear, 33, insert, 34, traction needle, 35, pull plate, 36, bolt. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-14 The present invention provides a technical solution: a multi-directional traction frame for closed reduction of tibial fractures, comprising a base plate 1 with a load-bearing function. When in use, the base plate 1 is fixed to a bed or an operating table through mounting holes opened at four corners. Slide grooves 2 are opened at both ends of the base plate 1. A slider 3 is slidably connected to the inside of each slide groove 2. Figure 2Both sides of the slide 2 are provided with guide rods, which have a guiding function. The slider 3 slides horizontally inside the slide 2 through the guide rods. The inside of each slide 2 is rotatably connected with a lead screw 7, and the lead screw 7 is meshed with the slider 3. The right end of the lead screw 7 located inside the right slide 2 passes through the side wall of the slide 2 and extends to the outside of the bottom plate 1 and is connected with a rotary handle. When the rotary handle is turned, the lead screw 7 on the right side rotates, so that the lower side of the first support plate 4 slides on the bottom plate 1, so that the first support plate 4 and the second support plate 5 are relatively bent, and the upper sides of the two sliders 3 are Both ends penetrate the side wall of the slide groove 2 and extend to the upper side of the bottom plate 1 and are respectively hinged with a first support plate 4 and a second support plate 5, and the first support plate 4 and the second support plate 5 are made of aluminum material, so that X-ray can be performed on the lower side of the first support plate 4 and the second support plate 5 to facilitate surgery. The upper side of the first support plate 4 and the second support plate 5 can be connected with a plurality of belts (not shown in the figure) to fix the patient's legs, so that when the first support plate 4 rotates to the left, the patient's knees will bend accordingly, and the upper sides of the first support plate 4 and the second support plate 5 are rotatably connected through a hinge 6;

[0030] One side of the first support plate 4 is movably connected with a plurality of movable blocks 15. Since the fracture sites of different patients are different, the position of the movable block 15 can be set to be adjustable within a certain range. Specifically, one side of the first support plate is fixedly connected with a fixed rod 12. The outer side wall of the fixed rod 12 is provided with a plurality of slots 13. The interior of the slots 13 is movably connected with the movable block 15 through a pre-tightening block 14. The slots 13 are arranged on the fixed rod 12 in the form of a linear array. According to actual needs, the movable block 15 can be arbitrarily fixed inside any slot 13. The pre-tightening block 14 is engaged with the side wall of the slot 13. By turning the handle on the pre-tightening block 14, the end of the pre-tightening block 14 will extend into the interior of the slot 13 and generate an extrusion force on the side wall of the movable block 15, thereby fixing the movable block 15 on the fixed rod 12.

[0031] The movable block 15 is connected to a support plate 19 through a universal structure. A knob 20 is rotatably connected to the support plate 19. A clamping rod 21 is meshedly connected to the center of the knob 20. The clamping rod 21 is used to connect to an external bone screw. Fig.10The end of the clamping rod 21 shown is three open elastic claws, and the end is also engaged with a tightening wheel. When the tightening wheel is rotated toward the end, the three open elastic claws will squeeze toward the middle, thereby clamping the bone nail. The supporting plate 19 can be rotated and moved in any direction, so it is suitable for multi-directional traction and displacement. The clamping rod 21 is connected to the fixed tail fixed on the fracture block in advance. When the knob 20 is turned, since the supporting plate 19 is fixed, the clamping rod 21 clamps the bone nail and will pull and reset the fracture block (the traction and reset direction is along the axial direction of the clamping rod 21). In order to achieve fixation at multiple angles and orientations, the universal structure must have multiple nodes, and in order to be able to quickly position and pre-tighten during surgery, specifically, the universal structure includes a ball head 16 fixedly connected to the movable block 15, and the outside of the ball head 16 is rotatably connected to the first connecting rod 17 in a wrapped form, and the top end of the first connecting rod 17 is rotatably connected to the left end of the second connecting rod 18, and the top end of the first connecting rod 17 is rotatably connected to the second connecting rod 1 The left ends of the first and second connecting rods 17 and 18 are sleeved on the outside of the second screw rod 22, and the end of the second connecting rod 18 away from the second screw rod 22 is also rotatably connected to the supporting plate 19 in the form of a ball head 16. The ends of the first and second connecting rods 17 and 18 are interference fit with the ball head 16, that is, there is a certain friction between them to maintain a certain angle, and can be quickly swung to a required angle. However, such an interference fit is unreliable in angle fixation, and it is easy to be displaced due to contact during surgery. Therefore, specifically, an extrusion rod 31 is slidably connected inside the first and second connecting rods 17 and 18, one end of the extrusion rod 31 is movably engaged with the ball head 16, and the other end is movably engaged with the inside of the annular groove 23, the annular groove 23 is opened on the side wall of the second screw rod 22, and the number of the annular grooves 23 is two and corresponds to the ends of the two extrusion rods 31, the side wall of the annular groove 23 is an arc surface and cooperates with the end of the extrusion rod 31, and the end of the second screw 22 is meshed and connected with the end of the second connecting rod 18.

[0032] like Fig.11 As shown, through the threaded arrangement of the end of the second screw 22 and the end of the second connecting rod 18, when the second screw 22 is rotated in the forward direction, the second screw 22 will slide toward the inside of the first connecting rod 17 and the second connecting rod 18, so that the connection between the first connecting rod 17 and the second connecting rod 18 will be tightly fitted together, so that the connection angle between the first connecting rod 17 and the second connecting rod 18 is fixed, and at the same time, because the annular groove 23 will also move with the second screw 22, the arc-shaped side wall of the annular groove 23 will push the extrusion rod 31 to move to the other end (the process is shown in the left and right figures of 11), so the extrusion rod 31 will be squeezed by the side wall of the second screw 32 toward the ball head 16, so that the friction between the two ball heads 16 and the first connecting rod 17 and the second connecting rod 18 at the connection points respectively will increase, thereby fixing the position and angle of the supporting plate 19.

[0033] In addition, on the basis of this universal structure, a plurality of inserts 33 are provided at one end of the extrusion rod 31 close to the ball head 16, and the extrusion rod 31 is movably connected to the ball head 16 through the inserts 33, and the inserts 33 have a certain elasticity, such as the fixation between the first connecting rod 17 and the ball head 16. When the extrusion rod 31 slides toward the ball head 16, the inserts 33 will be stretched outward, so that each insert 22 will be inserted between the ball head 16 and the inner side wall of the first connecting rod 17, so that the rotation space of the ball head 16 is squeezed and becomes smaller, and thus it cannot rotate. When the extrusion rod 31 is no longer squeezed by the side wall of the second screw rod 22, the inserts 33 are elastically reset and the inserts 33 are pulled out from between the ball head 16 and the inner side wall of the first connecting rod 17, so that the first connecting rod 17 and the ball head 16 can rotate relative to each other; the rotation and fixing principles of the ball head 16 and the second connecting rod 18 are the same as described above.

[0034] When a fracture patient lies on the bed, if the fractured leg is not in a suitable position, the patient's body will be moved and adjusted, thereby causing great pain to the patient. In order to relieve the patient's pain, specifically, the inner end of the lead screw 7 is fixedly sleeved with a first gear 8, and one side of the first gear 8 and located inside the bottom plate 1 is slidably connected with a top block 9 through a first spring 10. The first spring 10 connects the top block 9 to the side wall of the bottom plate 1 and has a certain pulling force. When the top block 9 is not subjected to the top force of the first screw rod 11, the top block 9 is pulled by the first spring 10 to disengage the second gear 32 from the first gear 8. A second gear 32 is rotatably connected to the top block 9 (the central axis of the second gear 32 is rotatably connected to the side wall of the top block 9), and the two ends of the second gear 32 are respectively movably meshed with the two first gears 8. When the second gear 32 is meshed with the two first gears 8, the two The first and second support plates 4, 5 are in a reasonable position on the patient's legs while the patient remains motionless, thereby reducing the patient's pain. At this time, the bending angles of the first and second support plates 4, 5 remain unchanged, and the first screw rod 11 is movably connected to the side of the top block 9 away from the second gear 32. The outer end of the first screw rod 11 passes through the side wall of the bottom plate 1 and extends to the outside thereof and is connected to a rotary handle (the surface of the first screw rod 11 is provided with a thread that meshes with the inside of the bottom plate 1, and the thread line is not shown in the figure, so as to facilitate the control of movement, and the connection between the first screw rod 11 and the top block 9 is a rotational clamping connection with a T-shaped structure). When the first screw rod 11 moves inward, it will slide against the top block 9, thereby making the second gear 32 mesh with the two first gears 8, thus ensuring that the two screw rods 7 rotate at the same time.

[0035] Most tibia fractures require the use of a traction device to reposition the fracture. Currently, other devices are used to connect heavy objects to pull, which is difficult to operate during surgery. Therefore, the present invention can also integrate the traction part. Specifically, a moving block 24 is movably connected to the upper surface of the bottom plate 1 and located at the right end of the first support plate 4. The moving block 24 moves with the movement of the first support plate 4. The lower side of the moving block 24 penetrates the side wall of the bottom plate 1 and extends to the inside of the slide groove 2 and is meshed and sleeved on the lead screw 7. An adjusting block 25 is slidably connected to the left side of the moving block 24 through a second spring 26. The right end of the second spring 26 is connected to the inner wall of the moving block 24, and the left end is connected to the side wall of the adjusting block 25. The second spring 26 is in a contracted state when not traction. When the adjusting block 25 is pulled to the left, the adjusting block 25 stretches and expands the second spring 26. The elongation of the second spring 26 will be different depending on the pulling force, and then the adjusting block 25 will rotate the pointing shaft 28 through the pull rope 27 at different degrees, so that the pointing shaft 28 The pointer on the dial 29 will also point differently so that real-time readings can be made. The dial 29 is fixedly connected to the upper right end surface of the moving block 24. The upper end surface of the dial 29 is engraved with a force scale. The center position of the dial 29 is rotatably connected to the pointing shaft 28. The lower end of the pointing shaft 28 is provided with a torsion spring 30. When the pull rope 27 is unfolded from the pointing shaft 28, the torsion spring 30 will generate a torque to reset the pointing shaft 28, so that the pull rope 27 is wound around the pointing shaft 28 again (the torque of the torsion spring 30 is small and is only used to reel in the pull rope 27, so there is no need to consider the impact on the traction force of the adjustment block 25, or the elastic coefficients of the torsion spring 30 and the second spring 26 can be taken into account in advance in the display value of the dial 29). The pull rope 27 is wound around the middle of the pointing shaft 28, and the outer end of the pull rope 27 is connected to the side wall of the adjustment block 25. The left side of the adjustment block 25 is connected to a traction device through a wire rope. Generally, fracture reduction requires restoration of limb length first. Traction in the long axis direction of the fracture can partially or completely restore the length problem. Traction in the long axis direction of the fracture is most effective when the calcaneal traction or distal tibia traction is performed. The traction device in the long axis direction of the fracture in the device includes (such as Figure 8 As shown in the figure, the traction needle 34, two pull plates 35, and two bolts 36 are inserted into the calcaneus of the human body, and the two ends are sleeved on a pull plate 35. The two pull plates 35 are connected by bolts 36. The distance between the two pull plates 35 can be adjusted by rotating the bolts 36, so that the pulling force of the traction needle 34 can be adjusted, so as to effectively reset and fix. Similarly, when the traction device is traction, the lower pull plate 35 will pull the adjustment block 25 in the opposite direction, so that the adjustment block 25 slides to the left, so that the adjustment block 25 will pull the pull rope 27 to rotate the pointing shaft 28, so that the pointer on the pointing shaft 28 rotates, and then the traction force can be clearly observed on the dial 29, so that the traction force can be better grasped.

[0036] Working principle: This device can be used during surgery or in the postoperative rehabilitation in the ward. During the operation, the device is fixed to the operating table according to the situation, and the first screw 11 is rotated forward to make the second gear 32 mesh with the two first gears 8. The two screws 7 will rotate at the same time, and the first support plate 4 and the second support plate 5 will move to the right or left on the bottom plate 1 at the same time, so that the patient can adjust the first support plate 4 and the second support plate 5 to a reasonable position on the patient's legs while remaining motionless; after fixing the patient's legs on the first support plate 4 and the second support plate 5; when traction is performed in the longitudinal direction of the fracture, the traction needle 34 is punctured into the calcaneus of the foot, and the two ends are sleeved on a pull plate 35. The distance between the two pull plates 35 can be adjusted by rotating the bolt 36, so that the downward pulling force of the traction needle 34 can be adjusted, thereby effectively resetting and fixing, and the traction force is adjusted to a moderate level according to the device for detecting the pulling force on the moving block 24;

[0037] During the operation, an X-ray machine is used to perform real-time intraoperative examinations, and then bone screws are driven into the fractured bone (pay attention to the location of the bone screws to avoid the blood vessels and nerves in the outer half circle). Fig.12 As shown in the figure, the universal structure is rotated to connect the clamping rod 21 with the bone screw, and then by rotating the knob 20, the clamping rod 21 will bring the fracture fragments to be relocated and pulled along the axis direction of the clamping rod 21, so that multiple fracture fragments can be spliced ​​and relocated, and a steel plate can be placed on the side of the leg bone for fixation. The effect is as follows: Fig.13 As shown;

[0038] In addition, sometimes it is necessary to fix it in the form of an intramedullary nail. In this case, the present invention can reversely rotate the first screw rod 11 to make the first screw rod 11 slide out. At this time, the second gear 32 is disengaged from the two first gears 8. In this way, when the right screw 7 is rotated, the lower side of the first support plate 4 slides left and right alone, thereby increasing the angle between the first support plate 4 and the second support plate 5, so that the patient's knee bending degree is maximized. In this way, the Schanz pin can be minimally invasively implanted from the patient's knee, and its effect is as follows. Fig.14 After surgery, the device can be removed after the patient has rested for a period of time.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional traction frame for closed reduction of tibial fractures, comprising a base plate (1) having a load-bearing function, wherein the base plate (1) is fixed to an external device via mounting holes at four corners, and characterized in that: Both ends of the bottom plate (1) are provided with a slide groove (2), each slide groove (2) is slidably connected to a slider (3), each slide groove (2) is rotatably connected to a lead screw (7) inside, and the lead screw (7) is meshingly connected to the slider (3), the right end of the lead screw (7) located inside the right slide groove (2) passes through the side wall of the slide groove (2) and extends to the outside of the bottom plate (1) and is connected to a rotary handle, the upper ends of the two sliders (3) pass through the top wall of the slide groove (2) and are rotatably connected to the first support plate (4) and the second support plate (5), respectively, the upper sides of the first support plate (4) and the second support plate (5) are rotatably connected via a hinge (6); A plurality of movable blocks (15) are movably connected to one side of the first support plate (4); the movable blocks (15) are connected to a support plate (19) via a universal structure; a knob (20) is rotatably connected to the inside of the support plate (19); a clamping rod (21) is meshedly connected to the center of the knob (20); a first gear (8) is fixedly sleeved to the inner end of the lead screw (7); a top block (9) is slidably connected to one side of the first gear (8) and is located inside the bottom plate (1) via a first spring (10); a second gear (32) is rotatably connected to the top block (9); and two ends of the second gear (32) are respectively movably meshed with the two first gears (8); a first screw rod (11) is movably connected to the side of the top block (9) away from the second gear (32); an outer end of the first screw rod (11) penetrates through the side wall of the bottom plate (1) and extends The bottom plate (1) is provided with a movable block (24) on the upper surface of the bottom plate (1) and at the right end of the first support plate (4). The lower side of the movable block (24) passes through the side wall of the bottom plate (1) and extends to the inside of the slide groove (2) and is meshed and sleeved on the lead screw (7). The left side of the movable block (24) is slidably connected to an adjusting block (25) via a second spring (26). The right upper end surface of the movable block (24) is fixedly connected to a dial (29). The center position of the dial (29) is rotatably connected to a pointing shaft (28). The lower end of the pointing shaft (28) is provided with a torsion spring (30). A pull rope (27) is wound around the middle of the pointing shaft (28), and the outer end of the pull rope (27) is connected to the side wall of the adjusting block (25). The left side of the adjusting block (25) is connected to a traction device via a steel wire rope. The traction device comprises a traction needle (34), two pulling plates (35), and two bolts (36). The traction needle (34) is inserted into the calcaneus of a human body and its two ends are sleeved on a pulling plate (35). The two pulling plates (35) are connected by the bolt (36). By rotating the bolt (36), the distance between the two pulling plates (35) is adjusted, thereby adjusting the downward pulling force of the traction needle (34).

2. A multi-directional traction frame for closed reduction of tibial fracture according to claim 1, characterized in that: A fixing rod (12) is fixedly connected to one side of the first support plate (4); a plurality of slots (13) are formed on the outer wall of the fixing rod (12); and a movable block (15) is movably engaged inside the slot (13) via a pre-tightening block (14).

3. The multi-directional traction frame for closed reduction of tibial fracture according to claim 1, characterized in that: The universal structure comprises a ball head (16) fixedly connected to the movable block (15); the outside of the ball head (16) is rotatably connected to a first connecting rod (17) in a wrapped manner; the top end of the first connecting rod (17) is rotatably connected to the left end of the second connecting rod (18); the top end of the first connecting rod (17) and the left end of the second connecting rod (18) are both sleeved on the outside of the second screw rod (22); one end of the second connecting rod (18) away from the second screw rod (22) is also rotatably connected to the supporting plate (19) in the form of a ball head (16); the insides of the first connecting rod (17) and the second connecting rod (18) are both slidably connected to an extrusion rod (31); one end of the extrusion rod (31) is movably engaged with the ball head (16), and the other end is movably engaged with the inside of an annular groove (23); the annular groove (23) is opened on the side wall of the second screw rod (22).

4. A multi-directional traction frame for closed reduction of tibial fracture according to claim 3, characterized in that: The number of the annular grooves (23) is two and they correspond to the ends of the two extrusion rods (31). The side wall of the annular groove (23) is an arc-shaped surface and matches the end of the extrusion rod (31). The end of the second screw rod (22) is meshedly connected with the end of the second connecting rod (18).

5. The multi-directional traction frame for closed reduction of tibial fracture according to claim 4, characterized in that: A plurality of inserting pieces (33) are provided at one end of the extrusion rod (31) close to the ball head (16), and the extrusion rod (31) is movably engaged with the ball head (16) via the inserting pieces (33).

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