Electric traction prying reset device for calcaneal fracture

Abstract

The application provides a calcaneal fracture electric traction prying reset device, which comprises a bottom plate, a bandage and a flexible pad arranged on the bottom plate, a handle connected to one end of the bottom plate, a sector plate arranged between the bottom plate and the handle, a rotating plate rotatably arranged on the sector plate, an arc-shaped frame slidably arranged at the end of the rotating plate, a needle sleeve rotatably arranged at the end of the arc-shaped frame, and a prying needle arranged in the needle sleeve, wherein the rotating axis of the needle sleeve, the axis of the arc-shaped frame and the rotating axis of the rotating plate are staggered with each other, a driving mechanism connected to the arc-shaped frame is arranged on the rotating plate, and the arc-shaped frame is driven to slide along its axis by the driving mechanism. The reset device directly meets the clinical requirement of single Kirschner wire prying reset in most cases without pre-linkage assembly of multiple Kirschner wires, and the prying needle can be kept in the positioning state after reset, which is convenient for subsequent fixation of other Kirschner wires.

Description

Technical Field

[0001] This invention specifically relates to an electric traction prying reduction device for calcaneal fractures. Background Technology

[0002] Calcaneal fractures are a common type of foot fracture in clinical practice, mostly caused by external impacts such as falls from heights or crushing from heavy objects. Calcaneal fractures are most often treated with an extended lateral incision. Open surgery is more invasive, and patients recover more slowly after surgery, which can easily lead to a series of wound complications, such as delayed wound healing, skin edge necrosis, infection, and exposure of internal fixation devices and bone. In recent years, many scholars have used small incisions to directly reduce the articular surface, using traction, prying and other techniques to reduce the fracture, and implanting plates or screws through small incisions to fix the reduced bone fragments, which has also achieved good results.

[0003] For example, Chinese invention patent CN109758224B provides an electric traction and prying reduction device for calcaneal fractures, including a first Kirschner wire, a first Kirschner wire assembly, a drive mechanism, a second Kirschner wire, a second Kirschner wire assembly, and a third Kirschner wire; the first Kirschner wire assembly includes a first fixed end and an inner sliding end; the first fixed end is hollow inside, and the first Kirschner wire is fitted in the hollow position; the drive mechanism includes a drive rod assembly and a power assembly; the drive rod assembly includes an outer sliding end, a retaining ring, a rack end, and a prying and fixing end, which can solve the technical problem of how to better perform traction and prying reduction of fractured calcaneus.

[0004] For example, Chinese invention patent CN117958928A provides a calcaneal reduction device that uses Kirschner wires A, B, and C to limit the position of the patient's calcaneus. Under the action of the telescopic component, the reduction length of the calcaneus is limited. At the same time, under the action of the pressure rod, the reduction height of the calcaneus can be effectively limited. With the help of Kirschner wires to pry and reduce the joint surface, the Böhler's angle and Gissane's angle of the calcaneus are restored, thereby restoring the entire calcaneal shape. This can effectively reduce operation time, surgical trauma, and complications.

[0005] However, existing calcaneal fracture reduction devices are mostly designed based on a multi-Kirschner wire linkage architecture. This requires pre-inserting multiple Kirschner wires into specific locations on the calcaneus and assembling them with the reduction device, using the coordinated force of multiple wires to achieve reduction. However, in clinical practice, most calcaneal fractures (such as simple calcaneal body fractures and articular surface fractures without significant displacement) can be reduced with only a single Kirschner wire. After reduction, other Kirschner wires or screws are inserted for fixation based on fracture stability. Because existing reduction devices rely on a multi-wire linkage design, they cannot be adapted to reduction operations with a single Kirschner wire. This necessitates the assembly of redundant components or the replacement of specialized instruments by medical staff, increasing surgical steps and operational difficulty, and failing to meet the treatment needs of different fracture types, thus limiting their widespread clinical application. Therefore, this paper proposes an electric traction reduction device for calcaneal fractures to address these issues. Summary of the Invention

[0006] Therefore, it is necessary to address the issue that most existing calcaneal fracture manipulation reduction devices require multiple Kirschner wires to be linked together before they can be used for manipulation. However, not all calcaneal fractures require multiple Kirschner wires to be punctured. In most cases, only a single Kirschner wire is used for manipulation reduction, and then the remaining Kirschner wires are inserted to fix the calcaneus. This makes the existing reduction devices unsuitable for all medical situations. Therefore, an electric traction manipulation reduction device for calcaneal fractures is needed.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an electric traction lever reduction device for calcaneal fractures, comprising: A base plate, on which straps and a flexible pad are provided, and a handle is connected to one end of the base plate; A fan-shaped plate is disposed between the base plate and the handle, and a rotating plate is rotatably disposed on the fan-shaped plate; An arc-shaped frame is slidably disposed at the end of the rotating plate, and a rotatable needle sleeve is disposed at its end. The rotation axis of the needle sleeve, the axis of the arc-shaped frame, and the rotation axis of the rotating plate intersect each other. A prying needle is inserted inside the needle sleeve. A drive mechanism is disposed on the rotating plate and connected to the arc-shaped frame to drive the arc-shaped frame to slide along its axis.

[0008] In one embodiment, the rotating plate is provided with a slider, the sector plate is provided with an arc groove, the slider is slidably engaged in the arc groove, the sector plate is also provided with an arc scale line, the rotating plate is provided with an indicator groove, and one end of the sector plate is also provided with a U-shaped frame for the arc frame to pass through.

[0009] In one embodiment, a first threaded knob is provided on the rotating plate, and the first threaded knob is screwed to the center of the sector plate.

[0010] In one embodiment, the arc-shaped frame is provided with a mounting sleeve at its end, and the needle sleeve is provided with two sets of connecting frames. The two sets of connecting frames are hinged to both ends of the mounting sleeve. A second threaded knob is provided on one set of connecting frames, and the second threaded knob passes through the mounting sleeve and is screwed to the other set of connecting frames.

[0011] In one embodiment, the drive mechanism includes: A drive motor is fixedly mounted on the rotating plate, and a worm gear is provided on its output shaft; A control switch is disposed on the grip and electrically connected to the drive motor; and A worm gear rack is disposed on the outer arc surface side of the arc-shaped frame and meshes with the worm.

[0012] In one embodiment, the rotating plate is provided with a slidable abutment block, and the arc-shaped frame located on the opposite side of the worm gear rack is slidably connected to the end of the abutment block. The rotating plate is also provided with a propulsion mechanism connected to the rotating plate, which drives the abutment block to slide and self-locks its position.

[0013] In one embodiment, the propulsion mechanism includes: A sliding seat is provided on the rotating plate, and the sliding seat is slidably engaged in the sliding groove. A lever is mounted on the sliding seat; An inclined groove is arranged on the abutment block, and both ends of the groove are connected to straight grooves; and The drive column is located at the bottom of the sliding seat and is slidably engaged within one of the set of straight slots.

[0014] In one embodiment, the rotating plate is further provided with a limiting mechanism that can be connected to the arc-shaped frame, the limiting mechanism comprising: The dial is rotatably mounted on the rotating plate, and multiple sets of teeth are spaced apart around its periphery. A linkage component is mounted on the arc-shaped frame and connected to the dial to convert the rotation of the arc-shaped frame into driving the rotation of the dial. The locking block is engaged within one set of the locking teeth; and A sliding frame is provided at the end of the rotating plate, and a limiting rod is provided on the sliding clamp.

[0015] In one embodiment, the linkage component includes: An arc-shaped rack is arranged on the side of the arc-shaped frame, and an arc-shaped clearance groove is provided on one side of the arc-shaped rack; A spur gear, rotatably mounted on the rotating plate and coaxially connected to the scale, meshes with the arc-shaped rack; and The reset coil spring is connected at one end to the dial and at the other end to the rotating plate.

[0016] In one embodiment, a mounting bracket is rotatably provided on the dial, and the locking block is slidably disposed at the end of the mounting bracket.

[0017] Compared with the prior art, the present invention has at least the following advantages: When using this reduction device, it is fixed to the patient's foot with a strap. The rotating plate, arc frame, and needle sleeve are rotated to align the needle sleeve with the needle insertion position. The three-axis motion allows the position of the needle sleeve to match various spatial positions, and the angle and position of the prying needle can be adjusted in multiple dimensions to adapt to different reduction angle requirements of calcaneal fractures. The positions of the rotating plate, arc frame, and needle sleeve are then fixed, and the prying needle is then punctured. After puncture, the arc frame is controlled to slide along its axis through the drive mechanism, thereby applying power to the end of the prying needle to complete the prying action. It does not require the pre-assembly of multiple Kirschner wires and directly meets the clinical needs of single Kirschner wire prying reduction in most cases. Moreover, the positioning state of the prying needle can be retained after reduction, which is convenient for subsequent insertion of other Kirschner wires for fixation. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 A three-dimensional structural diagram of an electric traction lever reduction device for calcaneal fractures provided by the present invention; Figure 2 This is a side view of an electric traction lever reduction device for calcaneal fractures according to the present invention; Figure 3 This is a schematic diagram of the structure of the base plate in an electric traction lever reduction device for calcaneal fractures according to the present invention. Figure 4 This is a schematic diagram of the rotating plate and its upper parts in an electric traction prying reduction device for calcaneal fractures according to the present invention. Figure 5 This is a schematic diagram of the arc-shaped frame in an electric traction lever reduction device for calcaneal fractures according to the present invention; Figure 6 This is a schematic diagram of the rotating plate in an electric traction lever reduction device for calcaneal fractures according to the present invention. Figure 7 for Figure 6 Enlarged view of region A in the middle; Figure 8 This is a schematic diagram of the limiting component in an electric traction lever reduction device for calcaneal fractures according to the present invention.

[0020] Figure label: 1. Base plate; 2. Flexible pad; 3. Strap; 4. Fan-shaped plate; 5. Arc-shaped scale line; 6. Arc-shaped groove; 7. U-shaped frame; 8. Handle; 9. Control switch; 10. Rotating plate; 11. First threaded knob; 12. Slider; 13. Indicator groove; 14. Drive motor; 15. Worm gear; 16. Sliding frame; 17. Limiting rod; 18. Spur gear; 19. Dial; 20. Mounting bracket; 21. Abutment block; 22. Sliding groove; 23. Inclined groove; 24. Straight groove; 25. Sliding seat; 26. Drive column; 27. Lever; 28. Arc-shaped frame; 29. ​​Worm gear rack; 30. Arc-shaped rack; 31. Arc-shaped clearance groove; 32. Mounting sleeve; 33. Pin sleeve; 34. Connecting frame; 35. Pry pin; 36. Second threaded knob; 37. Reset coil spring; 38. Locking block. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Example: Please see Figures 1 to 3This invention provides an electric traction prying reduction device for calcaneal fractures, comprising a base plate 1, a strap 3 and a flexible pad 2 on the base plate 1, a handle 8 connected to one end of the base plate 1, a fan-shaped plate 4 between the base plate 1 and the handle 8, a rotating plate 10 rotatably mounted on the fan-shaped plate 4, an arc-shaped frame 28 slidably mounted at the end of the rotating plate 10, and a rotatable needle sleeve 33 mounted at the end of the arc-shaped frame 28. The rotation axis of the needle sleeve 33, the axis of the arc-shaped frame 28 and the rotation axis of the rotating plate 10 are intersected, and a prying needle 35 is inserted inside the needle sleeve 33.

[0025] The rotating plate 10 can rotate along its hinge point with the sector plate 4, the arc frame 28 can slide along its axis at the end of the rotating plate 10, and the needle sleeve 33 can rotate along its hinge point with the arc frame 28. Thus, the position of the needle sleeve 33 can be adjusted in multiple dimensions so that the axis of the needle sleeve 33 can coincide with the needle insertion position. The needle 35 can be punctured and pried first, and then the needle sleeve 33 can be installed. Finally, the position of the base plate 1 can be fixed. Alternatively, the position of the needle sleeve 33 can be rotated, adjusted, and fixed first, and then the needle insertion can be performed.

[0026] Please see Figure 3 , 4 In this embodiment, a slider 12 is provided on the rotating plate 10, an arc groove 6 is provided on the sector plate 4, the slider 12 is slidably locked in the arc groove 6, an arc scale line 5 is also provided on the sector plate 4, an indicator groove 13 is provided on the rotating plate 10, and a U-shaped frame 7 for the arc frame 28 to pass through is also provided at one end of the sector plate 4.

[0027] The rotation of the rotating plate 10 can be guided by the slider 12 to prevent the position of the rotating plate 10 from shifting, thereby improving the stability of the resetter structure. At the same time, the position of the rotating plate 10 can be precisely adjusted by the cooperation of the arc-shaped scale line 5 and the indicator groove 13.

[0028] Please see Figure 4 , 5 In this embodiment, a first threaded knob 11 is threaded through the rotating plate 10 and screwed to the center of the sector plate 4. The position of the rotating plate 10 can be fixed by rotating the first threaded knob 11. An installation sleeve 32 is provided at the end of the arc-shaped frame 28. Two sets of connecting frames 34 are provided on the needle sleeve 33. The two sets of connecting frames 34 are hinged to both ends of the installation sleeve 32. A second threaded knob 36 is threaded through one set of connecting frames 34. The second threaded knob 36 passes through the installation sleeve 32 and is screwed to the other set of connecting frames 34. The position of the needle sleeve 33 can also be fixed by rotating the second threaded knob 36 to ensure stability during subsequent prying.

[0029] Please see Figure 4 , 5In this embodiment, a drive mechanism connected to the arc-shaped frame 28 is provided on the rotating plate 10, and the arc-shaped frame 28 is driven to slide along its axis by the drive mechanism. The drive mechanism includes a drive motor 14 fixedly mounted on the rotating plate 10, a worm gear 15 is provided on the output shaft of the drive motor 14, a control switch 9 electrically connected to the drive motor 14 is provided on the handle 8, and a worm gear rack 29 is provided on the outer arc surface of the arc-shaped frame 28, and the worm gear rack 29 meshes with the worm gear 15.

[0030] After the pry needle 35 is inserted, the drive motor 14 can be started by gripping the handle 8 and pressing the control switch 9. The drive motor 14 controls the worm gear 15 to rotate, and then the worm gear 15 and the worm wheel rack 29 work together to drive the arc frame 28 to slide, thereby moving the needle sleeve 33 to perform the prying action. The worm gear 15 and the worm wheel rack 29 can also self-lock the arc frame 28 after it has moved, thus maintaining the positioning state of the pry needle 35 and traction and fixing the pry needle 35, which is convenient for subsequent insertion of other Kirschner wires for fixation. There is no need to manually forcefully pry the pry needle 35, thus reducing the labor intensity of medical staff.

[0031] Please see Figures 4 to 7 In this embodiment, a slidable abutment block 21 is provided on the rotating plate 10. The arc-shaped frame 28 is slidably connected to the end of the abutment block 21 on the opposite side of the worm gear rack 29. The rotating plate 10 is also provided with a propulsion mechanism connected to the rotating plate 10. The propulsion mechanism drives the abutment block 21 to slide and locks its position. The propulsion mechanism includes a sliding seat 25. A groove 22 is provided on the rotating plate 10. The sliding seat 25 is slidably locked in the groove 22. A lever 27 and a drive column 26 are respectively provided on both sides of the sliding seat 25. An inclined groove 23 is provided on the abutment block 21. Both ends of the inclined groove 23 are connected to straight grooves 24. The drive column 26 is slidably locked in one of the straight grooves 24.

[0032] The sliding seat 25 can be moved within the groove 22 by moving the lever 27. This, in turn, controls the sliding of the abutment block 21 through the cooperation of the drive column 26 and the inclined groove 23. The arrangement of the straight groove 24 allows the drive column 26 to lock the position of the abutment block 21 after sliding in, preventing it from sliding independently. During the sliding of the abutment block 21, the arc-shaped frame 28 can follow, causing the worm gear rack 29 to disengage from the worm 15, thus facilitating manual adjustment of the initial position of the arc-shaped frame 28.

[0033] Please see Figure 4 , 5In this embodiment, the rotating plate 10 is further provided with a limiting mechanism that can be connected to the arc-shaped frame 28. The limiting mechanism includes a rotatable dial 19 mounted on the rotating plate 10. Multiple sets of locking teeth are spaced apart around the circumference of the dial 19. The arc-shaped frame 28 is provided with a linkage component connected to the dial 19. The linkage component converts the rotation of the arc-shaped frame 28 into the rotation of the dial 19. A locking block 38 is locked in one set of locking teeth. A sliding frame 16 is provided at the end of the rotating plate 10. A limiting rod 17 is slidably locked in the sliding frame 16. A mounting bracket 20 is rotatably mounted on the dial 19. The locking block 38 is slidably mounted at the end of the mounting bracket 20.

[0034] The linkage component includes an arc-shaped rack 30 arranged on the side of the arc-shaped frame 28, an arc-shaped clearance groove 31 provided on one side of the arc-shaped rack 30, a spur gear 18 rotatably provided on the rotating plate 10, the spur gear 18 being coaxially connected to the dial 19, the spur gear 18 meshing with the arc-shaped rack 30, and a reset coil spring 37 provided on the dial 19, one end of the reset coil spring 37 being connected to the rotating plate 10.

[0035] In the initial stage of prying, without sliding the limiting rod 17, the locking block 38 does not abut against the limiting rod 17 when the dial 19 rotates. During the sliding of the arc frame 28, the dial 19 can be rotated through the cooperation of the arc rack 30 and the spur gear 18. The change in prying angle can be accurately determined by the number of rotations of the dial 19 and the scale. In the later stage of prying, when precise control of the prying angle is required, the locking block 38 can be locked onto the corresponding locking tooth by sliding the locking block 38 and rotating the mounting bracket 20. Then, the limiting rod 17 can be slid to extend it, thereby limiting the angle between the locking block 38 and the limiting rod 17. Continue to control the movement of the arc frame 28 until the locking block 38 abuts against the limiting rod 17, thereby completing the precise limiting of prying and improving the safety and reliability of the operation. After the prying is completed, the abutment block 21 can be controlled to retract and drive the arc frame 28 to slide, so that the spur gear 18 disengages from the arc rack 30 and moves into the arc relief groove 31. Under the action of the reset coil spring 37, the dial 19 is controlled to reset, so as to complete the overall reset of the resetter for subsequent use.

[0036] Specific usage and beneficial effects of the present invention: When using this reduction device, it is fixed to the patient's foot with a strap 3. The needle sleeve 33 is aligned with the needle insertion position by rotating the rotating plate 10, the arc frame 28, and the needle sleeve 33. The three-axis motion allows the position of the needle sleeve 33 to match various spatial positions, and the angle and position of the prying needle 35 can be adjusted in multiple dimensions to adapt to different reduction angle requirements of calcaneal fractures. The positions of the rotating plate 10, the arc frame 28, and the needle sleeve 33 are then fixed, and the prying needle 35 is then punctured. After puncture, the arc frame 28 can be controlled by the drive mechanism to slide along its axis, thereby applying power to the end of the prying needle 35 to complete the prying action. There is no need for multiple Kirschner wires to be pre-assembled in conjunction, which directly meets the clinical needs of single Kirschner wire prying reduction in most cases. Moreover, the positioning state of the prying needle 35 can be retained after reduction, which is convenient for subsequent insertion of other Kirschner wires for fixation.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An electric traction lever reduction device for calcaneal fractures, characterized in that, Including: The base plate (1) is provided with a strap (3) and a flexible pad (2), and a handle (8) is connected to one end of the base plate (1). A fan-shaped plate (4) is disposed between the base plate (1) and the handle (8), and a rotating plate (10) is rotatably disposed on the fan-shaped plate (4). An arc-shaped frame (28) is slidably disposed at the end of the rotating plate (10), and a rotatable needle sleeve (33) is disposed at its end. The rotation axis of the needle sleeve (33), the axis of the arc-shaped frame (28), and the rotation axis of the rotating plate (10) intersect each other. A prying needle (35) is inserted inside the needle sleeve (33). A drive mechanism is provided on the rotating plate (10) and connected to the arc frame (28) to drive the arc frame (28) to slide along its axis.

2. The electric traction lever reduction device for calcaneal fractures according to claim 1, characterized in that: The rotating plate (10) is provided with a slider (12), the sector plate (4) is provided with an arc groove (6), the slider (12) is slidably locked in the arc groove (6), the sector plate (4) is also provided with an arc scale line (5), the rotating plate (10) is provided with an indicator groove (13), and one end of the sector plate (4) is also provided with a U-shaped frame (7) for the arc frame (28) to pass through.

3. The electric traction lever reduction device for calcaneal fractures according to claim 1, characterized in that: The rotating plate (10) is provided with a first threaded knob (11), which is screwed to the center of the sector plate (4).

4. The electric traction lever reduction device for calcaneal fractures according to claim 1, characterized in that: The arc-shaped frame (28) is provided with an installation sleeve (32) at its end. The needle sleeve (33) is provided with two sets of connecting frames (34). The two sets of connecting frames (34) are hinged to both ends of the installation sleeve (32). A second threaded knob (36) is provided on one set of connecting frames (34). The second threaded knob (36) passes through the installation sleeve (32) and is screwed to the other set of connecting frames (34).

5. The electric traction lever reduction device for calcaneal fractures according to claim 1, characterized in that, The driving mechanism includes: A drive motor (14) is fixedly mounted on the rotating plate (10), and a worm gear (15) is mounted on its output shaft. A control switch (9) is provided on the grip (8) and electrically connected to the drive motor (14); The worm gear rack (29) is disposed on the outer arc surface of the arc frame (28) and meshes with the worm (15).

6. The electric traction lever reduction device for calcaneal fractures according to claim 5, characterized in that: The rotating plate (10) is provided with a slidable abutment block (21). The arc frame (28) located on the opposite side of the worm gear rack (29) is slidably connected to the end of the abutment block (21). The rotating plate (10) is also provided with a propulsion mechanism connected to the rotating plate (10). The propulsion mechanism drives the abutment block (21) to slide and self-locks its position.

7. The electric traction lever reduction device for calcaneal fractures according to claim 6, characterized in that, The propulsion mechanism includes: The sliding seat (25) is provided with a groove (22) on the rotating plate (10), and the sliding seat (25) is slidably engaged in the groove (22); A lever (27) is mounted on the sliding seat (25); An inclined groove (23) is arranged on the abutment block (21), and both ends of the groove are connected to straight grooves (24); and The drive column (26) is located at the bottom of the sliding seat (25) and is slidably engaged in one of the straight grooves (24).

8. The electric traction lever reduction device for calcaneal fractures according to claim 7, characterized in that, The rotating plate (10) is also provided with a limiting mechanism that can be connected to the arc frame (28), the limiting mechanism including: The dial (19) is rotatably mounted on the rotating plate (10), and multiple sets of teeth are spaced around its periphery. A linkage component is provided on the arc frame (28) and connected to the dial (19) to convert the rotation of the arc frame (28) into driving the dial (19) to rotate; The locking block (38) is engaged within one set of the locking teeth; and A sliding frame (16) is provided at the end of the rotating plate (10), and a limiting rod (17) is provided on the sliding frame.

9. The electric traction lever reduction device for calcaneal fractures according to claim 8, characterized in that, The linkage components include: An arc-shaped rack (30) is arranged on the side of the arc-shaped frame (28), and an arc-shaped clearance groove (31) is provided on one side of the arc-shaped rack (30). A spur gear (18) is rotatably mounted on the rotating plate (10) and coaxially connected to the dial (19). The spur gear (18) meshes with the arc-shaped rack (30). The reset coil spring (37) is connected at one end to the dial (19) and at the other end to the rotating plate (10).

10. The electric traction lever reduction device for calcaneal fractures according to claim 8, characterized in that: The dial (19) is rotatably provided with a mounting bracket (20), and the locking block (38) is slidably disposed at the end of the mounting bracket (20).

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