A fracture reduction and distraction device combining rapidity and distraction force
By designing a fracture reduction stretcher including Kleiner pin, external threaded tube, telescopic mechanism, pulling and guiding mechanism, the problems of insufficient operating space and slow adjustment speed in the traditional method are solved, and the combination of rapid adjustment and opening force is achieved, and surgical efficiency and stability are improved.
Patent Information
- Application Number
- CN202310623867.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-05-29
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2043-05-29
AI Technical Summary
During the operation of traditional fracture reduction stretchers, there are problems such as insufficient operating space and slow adjustment speed, making it difficult to combine rapid stretching and guaranteed stretching.
A fracture reduction stretcher is designed including two left and right K-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H-H
The combination of rapid adjustment and stretching force is achieved, the operation process is simplified, the efficiency and stability of the operation are improved, and the problems of insufficient operating space and slow adjustment speed in traditional methods are avoided.
Smart Images
Figure CN116392176B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of fracture distraction, in particular to a fracture reduction distractor combining rapidity and distraction force. Background Art
[0002] For patients with fractures, in order to avoid shortening during surgery, it is necessary to dilate the fracture site. For example, for patients with calcaneal fractures, Kirschner wires are generally used for dilation during surgery in order to better reduce the fracture. The traditional two-point dilation is not effective. The main reason is that the two Kirschner wires are one on the calcaneus and the other on the side of the calcaneus. The distance is very close, which reduces the operating space and is not conducive to the operation. At present, a Kirschner wire is fixed on the calcaneus and then a Kirschner wire is fixed on the tibia. This distance is large and the operating space is also large, which is more conducive to the smooth progress of the operation. However, there are also problems in actual use. The use of threaded transmission has a strong force, but the distance is large, the width is more than ten centimeters, and the adjustment speed is slow. The telescopic adjustment speed is fast, but the transmission force is small and needs to be manually pulled apart, which is not easy to dilate. Both have advantages and disadvantages. Therefore, how to combine the advantages of the two to achieve rapid dilation while ensuring the dilation force is an urgent problem that technicians in this field need to solve. Summary of the invention
[0003] The object of the present invention is to provide a fracture reduction and distraction device that combines rapidity and distraction force to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fracture reduction and distraction device that combines rapidity and distraction force, comprising two left and right Kirschner wires and a horizontal rightward externally threaded tube connected to the left Kirschner wire, a telescopic mechanism that can be extended and retracted left and right to prevent rotation is arranged between the externally threaded tube and the right Kirschner wire, the telescopic mechanism allows the two Kirschner wires to move left and right without rotating, and plays a left and right guiding role, and the right Kirschner wire is connected to a left-facing internally threaded plate that can fit onto the externally threaded tube, where the thread can be a triangular thread, which is easy to fit, and the inclined side is convenient for sliding to both sides and is not easy to get stuck, while the trapezoidal thread may also need to be moved left and right for fine adjustment when fitting, the cross-section of the internally threaded plate is an arc shape that is convenient for fitting onto the externally threaded tube, and the internally threaded plate can fit onto the external thread of the externally threaded tube after moving down to achieve left and right transmission, and also includes a pulling and closing mechanism arranged between the internally threaded plate and the externally threaded tube, and a guiding mechanism for radial guidance. The pulling and closing mechanism is used to fit the internal thread plate and the external thread pipe to realize thread transmission, and the guiding mechanism ensures that the internal thread plate fits the external thread pipe vertically along the radial direction.
[0005] Preferably, the telescopic mechanism includes a guide rod that is inserted into the outer threaded tube and has a matching shape, and the inner cavity of the outer threaded tube has a square cross section that prevents rotation, and the other end of the guide rod is connected to the Kirschner wire on the right. The guide rod is used to achieve telescopic guidance. Compared with ordinary guidance, the inner cavity of the outer threaded tube is used here, which is more compact and also facilitates the rotation of the inner threaded plate without blocking the rotation of the inner threaded plate.
[0006] Preferably, the pulling and closing mechanism comprises a sliding mechanism sleeved on the external threaded tube and a tension mechanism for pulling the sliding mechanism and the internal threaded plate together. The sliding mechanism facilitates the extension and retraction of the external threaded tube, and the tension mechanism facilitates the fitting transmission of the sliding mechanism and the internal threaded plate.
[0007] Preferably, the sliding mechanism comprises an annular sliding sleeve sleeved on the external threaded tube, arc-shaped chamfers are arranged at both ends of the inner cavity of the sliding sleeve, and the internal threaded plate is recessed outward to form a receiving portion for receiving the sliding sleeve. The sliding sleeve has left and right widths, and plays a role of support, balance and guidance. The inner diameter of the sliding sleeve is consistent with the outer diameter of the external threaded tube, and the receiving portion receives the sliding sleeve when the internal threaded plate and the external threaded tube are fitted.
[0008] Preferably, the tension mechanism comprises a threaded rod rotatably connected to the sleeve, and the threaded rod is connected to a rotary handle after passing through the accommodating portion, the threaded rod is threadedly connected to the accommodating portion, and a threaded barrel that is sleeved on the threaded rod and adapted to the threaded rod is fixed on the accommodating portion, the threaded barrel increases the connection length, has better stability, and is easy to rotate. The threaded rod rotates, and the internal threaded plate and the external threaded tube are driven to fit together through the sleeve.
[0009] Preferably, the left and right ends of the sliding sleeve respectively abut against the left and right walls of the corresponding inner cavity of the accommodating part to achieve guidance. The sliding sleeve cooperates with the inner cavity of the accommodating part to achieve left end guidance and ensure that the axes of the internal thread plate and the external thread tube are parallel. Here, the accommodating part plays a dual role of accommodation and guidance.
[0010] Preferably, the guide mechanism includes an annular rotating groove opened on the right side of the guide rod and an annular rotating block installed in the rotating groove, and the internal thread plate extends to the right to form a rotating part that can fit the rotating block when moving downward, the inner wall of the rotating part is smooth, and the inner diameter is consistent with the outer diameter of the rotating block. A guide block with a square cross-section passing through the rotating part outward is fixed on the rotating block, and a guide sleeve sleeved on the guide block is fixed on the outer end of the rotating part. The guide sleeve guides the guide block to move more smoothly along the radial direction, and at the same time, ensures that the axis of the internal thread plate is parallel to the axis of the external thread tube. Here, two guide blocks are set along the length direction of the inner rotating part to improve the parallelism of the axis of the internal thread plate and the external thread tube and avoid skewing.
[0011] Preferably, the invention further comprises a sphere provided in the middle for inserting a Kirschner wire, a socket provided in the middle for inserting the Kirschner wire, and a spherical shell with upper and lower openings is sleeved on the outer side of the sphere, the socket extends outward to form a cannula for inserting the Kirschner wire, a first tightening knob capable of pressing against the Kirschner wire is threadedly connected on the cannula, and a second tightening knob with an inner end pressing against the sphere is threadedly connected on the spherical shell, the left end of the externally threaded tube is fixed on the spherical shell on the left side, and the guide rod is fixed on the spherical shell on the right side. There is a gap between the socket and the Kirschner wire, which is convenient for using Kirschner wires of different diameters. The sphere can be rotated by loosening the second tightening knob to adjust the angle, and the depth adjustment and replacement of the Kirschner wire can be achieved by loosening the first tightening knob.
[0012] Preferably, the rotating groove extends rightward to the right spherical shell, and the right end of the rotating block is spherical and fits the right spherical shell to achieve right end guiding and positioning. To achieve right end positioning and guidance, the right end of the rotating block is spherical, with a large fitting area, to achieve circumferential positioning, and to improve the stability of the right end. The guide block is located on the left side, which is equivalent to the middle guide, and the sliding sleeve and the accommodating part realize the left end guide. In this way, the three guides ensure stability.
[0013] Preferably, a square fixing block is fixed to the upper end of the threaded rod, and a rotating cylinder with the other end fixed on the rotating handle is sleeved on the fixing block, a circular guide hole extending into the interior of the threaded rod is opened on the fixing block, and an anti-slip rod fixed on the rotating handle is inserted into the guide hole, and the fixing block and the rotating handle are connected by a spring sleeved on the anti-slip rod. When rotating around the external threaded rod, the rotating handle is pulled outward, and the rotating cylinder slides off the fixing block, thereby avoiding driving the threaded rod to rotate. After loosening, under the action of the spring, the rotating cylinder returns to its original position and sleeves on the fixing block, thus ensuring that when the threaded rod rotates around the external threaded tube, the threaded rod will not rotate around its own axis, thereby ensuring the fitting effect of the internal thread plate and the external threaded tube.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. In the initial state, the Kirschner wire is inserted into the bones on both sides of the fracture site. Under the support of the threaded rod, a gap is left between the internal thread plate and the external thread tube, so that the two Kirschner wires can be directly pulled closer or farther from each other to adjust the approximate position, thereby achieving rapid adjustment. Then, the rotary handle is turned, and the threaded rod drives the internal thread plate and the external thread tube to fit together to achieve thread matching. With the external thread tube as the axis, the rotary handle is rotated and the thread transmission is used to open the fracture, thereby ensuring the opening force and achieving a combination of rapid opening and opening force. At the same time, both are achieved through the rotary handle and the threaded rod. Only by changing the rotation direction, two operations can be achieved without changing the operating position, which is more concise and ingenious.
[0016] 2. The guide rod is installed in the external threaded tube, which has a more compact structure and is also convenient for the rotation of the internal threaded plate. Compared with setting the guide on the lower side, this will not affect the operation and can be directly rotated without obstruction;
[0017] 3. The sliding sleeve can be received in the accommodating part. At the same time, the accommodating part guides the sliding sleeve and guides the left end of the internal thread plate, while the guide block guides the middle side. The fitting of the rotating block and the right spherical shell realizes the right side guidance. At the same time, the right end of the rotating block is spherical, which can also realize circumferential rotation positioning to ensure the fitting of the internal thread plate and the external thread tube.
[0018] 4. When rotating the threaded rod itself, turn the handle, and the barrel drives the threaded rod to rotate through the fixed block. When rotating around the external threaded rod, pull the handle outward, and the barrel slides out of the fixed block, thereby avoiding driving the threaded rod to rotate around itself. After loosening, under the action of the spring, the barrel returns to its original position and is sleeved on the fixed block. In this way, when the threaded rod rotates around the external threaded tube, the threaded rod will not rotate around its own axis, thereby ensuring the fitting effect of the internal thread plate and the external threaded tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;
[0020] Figure 2 It is a front view of the first embodiment of the present invention;
[0021] Figure 3 is an isometric view of a first embodiment of the present invention;
[0022] Figure 4 An exploded view of a first embodiment of the present invention;
[0023] Figure 5 It is a front view of a second embodiment of the present invention;
[0024] Figure 6 It is a schematic diagram of the connection between the rotary drum and the fixed block of the second embodiment of the present invention;
[0025] Figure 7 This is an exploded view of the connection between the rotor and the fixed block according to the second embodiment of the present invention.
[0026] In the figure: 1. Kirschner wire; 2. external threaded tube; 3. internal threaded plate; 4. guide rod; 5. sliding sleeve; 6. accommodating portion; 7. threaded rod; 8. rotary handle; 9. rotary block; 10. rotating portion; 11. guide block; 12. guide sleeve; 13. sphere; 14. spherical shell; 15. cannula; 16. first tightening knob; 17. second tightening knob; 18. fixing block; 19. rotary cylinder; 20. anti-drop rod; 21. spring. DETAILED DESCRIPTION
[0027] 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.
[0028] Example 1
[0029] See also Figures 1 to 4 The present invention provides a technical solution of a fracture reduction and distraction device that combines rapidity and distraction force: a fracture reduction and distraction device that combines rapidity and distraction force, comprising two left and right Kirschner wires 1 and a horizontal rightward external threaded tube 2 connected to the left Kirschner wire 1, a telescopic mechanism that can be extended and retracted left and right to prevent rotation is arranged between the external threaded tube 2 and the right Kirschner wire 1, the telescopic mechanism enables the two Kirschner wires 1 to move left and right without rotating, and plays a left and right guiding role, and the right Kirschner wire 1 is connected to a leftward internal threaded plate that can fit on the external threaded tube 2 3. The threads of the external threaded tube 2 and the internal threaded plate 3 are both triangular threads, which are easier to slide in than the trapezoidal threads. The inclined sides are convenient for sliding to both sides and are not easy to get stuck. However, the trapezoidal threads may need to be moved left and right for fine adjustment when fitting. The cross section of the internal threaded plate 3 is an arc shape that is convenient for fitting on the external threaded tube 2, and the angle is less than 180°. The telescopic mechanism includes a guide rod 4 that is plugged into the external threaded tube 2 and has a square cross section that prevents rotation. The other end of the guide rod 4 is connected to the Kirschner wire 1 on the right. The telescopic guide is realized by the guide rod 4. Compared with the ordinary guide, the inner cavity of the external threaded tube 2 is used here, which is more compact and convenient for the rotation of the internal threaded plate 3. The rotation of the internal threaded plate 3 will not be blocked. It should be noted that in order to ensure the pressure balance in the external threaded tube 2, an exhaust hole can be set at the left end of the external threaded tube 2, or a ventilation groove that runs through the left and right sides is opened at the lower end of the guide rod 4.
[0030] After the internal thread plate 3 moves downward, it can fit the external thread of the external thread tube 2 to achieve left-right transmission, and also includes a pulling and closing mechanism arranged between the internal thread plate 3 and the external thread tube 2 and a guiding mechanism for radial guidance. The pulling and closing mechanism is used to fit the internal thread plate 3 and the external thread tube 2 to achieve thread transmission, and the guiding mechanism ensures that the internal thread plate 3 fits the external thread tube 2 vertically along the radial direction.
[0031] The pulling and closing mechanism includes a sliding mechanism sleeved on the external threaded tube 2 and a tension mechanism for pulling the sliding mechanism and the internal threaded plate 3 together. The sliding mechanism is convenient for the expansion and contraction of the external threaded tube 2, and the tension mechanism is convenient for the fitting transmission of the sliding mechanism and the internal threaded plate 3. The sliding mechanism includes an annular sliding sleeve 5 sleeved on the external threaded tube 2, and arc-shaped chamfers are set at both ends of the inner cavity of the sliding sleeve 5, and the internal threaded plate 3 is recessed outward to form a receiving portion 6 for accommodating the sliding sleeve 5. The sliding sleeve 5 has a left and right width, which plays a role of support, balance and guidance. The inner diameter of the sliding sleeve 5 is consistent with the outer diameter of the external threaded tube 2, and the receiving portion 6 is used to accommodate the sliding sleeve 5 when the internal threaded plate 3 and the external threaded tube 2 are fitted. The tension mechanism includes a threaded rod 7 rotatably connected to the sliding sleeve 5, and the threaded rod 7 is connected with a rotary handle 8 after passing through the receiving portion 6. The threaded rod 7 is threadedly connected to the receiving portion 6, and a threaded barrel sleeved on the threaded rod 7 is fixed on the receiving portion 6. The threaded barrel increases the connection length, has better stability, and is also easy to rotate. The threaded rod 7 rotates, driving the internal thread plate 3 and the external thread tube 2 to fit together through the sliding sleeve 5. The left and right ends of the sliding sleeve 5 respectively abut against the left and right walls of the inner cavity corresponding to the accommodating portion 6 to achieve guidance. The sliding sleeve 5 cooperates with the inner cavity of the accommodating portion 6 to achieve left end guidance, ensuring that the axes of the internal thread plate 3 and the external thread tube 2 are parallel. Here, the accommodating portion 6 plays a dual role of accommodation and guidance.
[0032] The guide mechanism includes an annular rotating groove opened on the right side of the guide rod 4 and an annular rotating block 9 installed in the rotating groove, and the internal thread plate 3 extends to the right to form a rotating part 10 that can fit the rotating block 9 when moving downward. The inner wall of the rotating part 10 is smooth, and the inner diameter is consistent with the outer diameter of the rotating block 9. A guide block 11 with a square cross-section that passes through the rotating part 10 outward is fixed on the rotating block 9, and a guide sleeve 12 that is sleeved on the guide block 11 is fixed on the outer end of the rotating part 10. The guide sleeve 12 guides the guide block 11 to move more smoothly along the radial direction. At the same time, it ensures that the axis of the internal thread plate 3 is parallel to the axis of the external thread tube 2. Here, two guide blocks 11 are set along the length direction of the internal rotating part 10 to improve the parallelism of the axis of the internal thread plate 3 and the external thread tube 2 and avoid skewing.
[0033] It also includes a sphere 13 for inserting the Kirschner wire 1 in the middle, a socket for inserting the Kirschner wire 1 in the middle of the sphere 13, and a spherical shell 14 with upper and lower openings is sleeved on the outer side of the sphere 13, and the socket extends outward to form a cannula 15 for inserting the Kirschner wire 1, and the cannula 15 is threadedly connected with a first tightening knob 16 that can press against the Kirschner wire 1, and the spherical shell 14 is threadedly connected with a second tightening knob 17 whose inner end presses against the sphere 13, the left end of the external threaded tube 2 is fixed on the spherical shell 14 on the left, and the guide rod 4 is fixed on the spherical shell 14 on the right. There is a gap between the socket and the Kirschner wire 1, which is convenient for the use of Kirschner wires of different diameters. The sphere 13 can be rotated by loosening the second tightening knob 17 to achieve angle adjustment, and the depth adjustment and replacement of the Kirschner wire 1 can be achieved by loosening the first tightening knob 16.
[0034] The rotating groove extends to the right to the ball shell 14 on the right, and the right end of the rotating block 9 is spherical and fits the ball shell 14 on the right to achieve right end guidance and positioning. To achieve right end positioning and guidance, the right end of the rotating block 9 is spherical, with a large fitting area, to achieve circumferential positioning, and improve the stability of the right end. The guide block 11 is located on the left, which is equivalent to the middle guide, and the sliding sleeve 5 and the accommodating portion 6 realize the left end guidance. In this way, the three guides ensure stability.
[0035] Example 2
[0036] See also Figures 5 to 7 The present invention provides a technical solution of a fracture reduction and distraction device that combines rapidity and distraction force: a fracture reduction and distraction device that combines rapidity and distraction force, comprising two left and right Kirschner wires 1 and a horizontal rightward external threaded tube 2 connected to the left Kirschner wire 1, a telescopic mechanism that can be extended and retracted left and right to prevent rotation is arranged between the external threaded tube 2 and the right Kirschner wire 1, the telescopic mechanism enables the two Kirschner wires 1 to move left and right without rotating, and plays a left and right guiding role, and the right Kirschner wire 1 is connected to a leftward internal threaded plate that can fit on the external threaded tube 2 3. The threads of the external threaded tube 2 and the internal threaded plate 3 are both triangular threads, which are easier to slide in than the trapezoidal threads. The inclined sides are convenient for sliding to both sides and are not easy to get stuck. However, the trapezoidal threads may need to be moved left and right for fine adjustment when fitting. The cross section of the internal threaded plate 3 is an arc shape that is convenient for fitting on the external threaded tube 2, and the angle is less than 180°. The telescopic mechanism includes a guide rod 4 that is plugged into the external threaded tube 2 and has a square cross section that prevents rotation. The other end of the guide rod 4 is connected to the Kirschner wire 1 on the right. The telescopic guide is realized by the guide rod 4. Compared with the ordinary guide, the inner cavity of the external threaded tube 2 is used here, which is more compact and convenient for the rotation of the internal threaded plate 3. The rotation of the internal threaded plate 3 will not be blocked. It should be noted that in order to ensure the pressure balance in the external threaded tube 2, an exhaust hole can be set at the left end of the external threaded tube 2, or a ventilation groove that runs through the left and right sides is opened at the lower end of the guide rod 4.
[0037] After the internal thread plate 3 moves downward, it can fit the external thread of the external thread tube 2 to achieve left-right transmission, and also includes a pulling and closing mechanism arranged between the internal thread plate 3 and the external thread tube 2 and a guiding mechanism for radial guidance. The pulling and closing mechanism is used to fit the internal thread plate 3 and the external thread tube 2 to achieve thread transmission, and the guiding mechanism ensures that the internal thread plate 3 fits the external thread tube 2 vertically along the radial direction.
[0038] The pulling and closing mechanism includes a sliding mechanism sleeved on the external threaded tube 2 and a tension mechanism for pulling the sliding mechanism and the internal threaded plate 3 together. The sliding mechanism is convenient for the expansion and contraction of the external threaded tube 2, and the tension mechanism is convenient for the fitting transmission of the sliding mechanism and the internal threaded plate 3. The sliding mechanism includes an annular sliding sleeve 5 sleeved on the external threaded tube 2, and arc-shaped chamfers are set at both ends of the inner cavity of the sliding sleeve 5, and the internal threaded plate 3 is recessed outward to form a receiving portion 6 for accommodating the sliding sleeve 5. The sliding sleeve 5 has a left and right width, which plays a role of support, balance and guidance. The inner diameter of the sliding sleeve 5 is consistent with the outer diameter of the external threaded tube 2, and the receiving portion 6 is used to accommodate the sliding sleeve 5 when the internal threaded plate 3 and the external threaded tube 2 are fitted. The tension mechanism includes a threaded rod 7 rotatably connected to the sliding sleeve 5, and the threaded rod 7 is connected with a rotary handle 8 after passing through the receiving portion 6. The threaded rod 7 is threadedly connected to the receiving portion 6, and a threaded barrel sleeved on the threaded rod 7 is fixed on the receiving portion 6. The threaded barrel increases the connection length, has better stability, and is also easy to rotate. The threaded rod 7 rotates, driving the internal thread plate 3 and the external thread tube 2 to fit together through the sliding sleeve 5. The left and right ends of the sliding sleeve 5 respectively abut against the left and right walls of the inner cavity corresponding to the accommodating portion 6 to achieve guidance. The sliding sleeve 5 cooperates with the inner cavity of the accommodating portion 6 to achieve left end guidance, ensuring that the axes of the internal thread plate 3 and the external thread tube 2 are parallel. Here, the accommodating portion 6 plays a dual role of accommodation and guidance.
[0039] The guide mechanism includes an annular rotating groove opened on the right side of the guide rod 4 and an annular rotating block 9 installed in the rotating groove, and the internal thread plate 3 extends to the right to form a rotating part 10 that can fit the rotating block 9 when moving downward. The inner wall of the rotating part 10 is smooth, and the inner diameter is consistent with the outer diameter of the rotating block 9. A guide block 11 with a square cross-section that passes through the rotating part 10 outward is fixed on the rotating block 9, and a guide sleeve 12 that is sleeved on the guide block 11 is fixed on the outer end of the rotating part 10. The guide sleeve 12 guides the guide block 11 to move more smoothly along the radial direction. At the same time, it ensures that the axis of the internal thread plate 3 is parallel to the axis of the external thread tube 2. Here, two guide blocks 11 are set along the length direction of the internal rotating part 10 to improve the parallelism of the axis of the internal thread plate 3 and the external thread tube 2 and avoid skewing.
[0040] It also includes a sphere 13 for inserting the Kirschner wire 1 in the middle, a socket for inserting the Kirschner wire 1 in the middle of the sphere 13, and a spherical shell 14 with upper and lower openings is sleeved on the outer side of the sphere 13, and the socket extends outward to form a cannula 15 for inserting the Kirschner wire 1, and the cannula 15 is threadedly connected with a first tightening knob 16 that can press against the Kirschner wire 1, and the spherical shell 14 is threadedly connected with a second tightening knob 17 whose inner end presses against the sphere 13, the left end of the external threaded tube 2 is fixed on the spherical shell 14 on the left, and the guide rod 4 is fixed on the spherical shell 14 on the right. There is a gap between the socket and the Kirschner wire 1, which is convenient for the use of Kirschner wires of different diameters. The sphere 13 can be rotated by loosening the second tightening knob 17 to achieve angle adjustment, and the depth adjustment and replacement of the Kirschner wire 1 can be achieved by loosening the first tightening knob 16.
[0041] The rotating groove extends to the right to the ball shell 14 on the right, and the right end of the rotating block 9 is spherical and fits the ball shell 14 on the right to achieve right end guidance and positioning. To achieve right end positioning and guidance, the right end of the rotating block 9 is spherical, with a large fitting area, to achieve circumferential positioning, and improve the stability of the right end. The guide block 11 is located on the left, which is equivalent to the middle guide, and the sliding sleeve 5 and the accommodating portion 6 realize the left end guidance. In this way, the three guides ensure stability.
[0042] A square fixing block 18 is fixed to the upper end of the threaded rod 7, and a rotating cylinder 19 is sleeved on the fixing block 18, and the other end of the rotating cylinder 19 is fixed on the rotating handle 8. A circular guide hole extending into the interior of the threaded rod 7 is provided on the fixing block 18, and an anti-slip rod 20 fixed on the rotating handle 8 is inserted in the guide hole. The fixing block 18 and the rotating handle 8 are connected by a spring 21 sleeved on the anti-slip rod 20. When rotating around the external threaded rod 2, the rotating handle 8 is pulled outward, and the rotating cylinder 19 slides out of the fixing block 18, thereby avoiding driving the threaded rod 7 to rotate. After loosening, under the action of the spring 21, the rotating cylinder 19 returns to the fixing block 18 again, so as to ensure that when the threaded rod 7 rotates around the external threaded tube 2, the threaded rod 7 will not rotate around its own axis, and the fitting effect of the internal threaded plate 3 and the external threaded tube 2 is ensured. In order to better return the rotating cylinder 19, the upper end of the fixing block 18 can be chamfered in the circumference, and the open end of the rotating cylinder 19 can also be chamfered. Alternatively, initially the rotary cylinder 19 does not contact the fixed block 18. When the externally threaded tube 2 and the internally threaded plate 3 are fitted, the rotary handle 8 is pressed in the direction of the externally threaded rod 2, and the rotary cylinder 19 is sleeved on the fixed block 18, thereby realizing rotation. When it is necessary to rotate around the externally threaded tube 2, under the action of the spring 21, the rotary cylinder 19 is separated from the fixed block 18 to avoid contact, and there will be no accidental touch during rotation.
[0043] Here, the external threaded tube 2, the internal threaded plate 3, the guide rod 4, the sliding sleeve 5, the accommodating portion 6, the threaded rod 7, the rotary handle 8, the rotary block 9, the rotating portion 10, the guide block 11 and the guide sleeve 12 can all be made of carbon fiber, which is light in weight, high in strength, and can also be X-ray-transmissive, which is better than stainless steel. The spheres 13 and the sphere shells 14 at both ends can be made of stainless steel.
[0044] Working principle: In the initial state, under the support of the threaded rod 7, there is a gap between the internal threaded plate 3 and the external threaded tube 2, so that the two Kirschner wires 1 can be directly pulled closer or farther from each other to achieve the adjustment of the approximate position, thereby achieving rapid adjustment. Then, the handle 8 is turned, and the threaded rod 7 drives the internal threaded plate 3 and the external threaded tube 2 to fit together to achieve thread matching. With the external threaded tube 2 as the axis, the handle 8 is rotated, and the thread transmission is used to open the tube, ensuring the opening force, thereby achieving the combination of rapid opening and opening force. At the same time, both are realized by the handle 8 and the threaded rod 7. Only by changing the rotation direction, two operations can be realized without changing the operating position, which is more concise and clever. The guide rod 4 is installed in the external threaded tube 2, and the structure is more compact, which is also convenient for the rotation of the internal threaded plate 3. Compared with setting the guide on the lower side, it will not affect the operation here, and it can be directly rotated without obstruction. The sleeve 5 can be received in the accommodating portion 6. At the same time, the accommodating portion 6 guides the sleeve 5 and guides the left end of the internal threaded plate 3. That is to say, the sleeve 5 can simultaneously guide in the left and right directions and in the radial direction of the external threaded tube 2, and the guide block 11 plays a central side guide. The fitting of the rotary block 9 and the right side ball shell 14 realizes right side guidance. At the same time, the right end of the rotary block 9 is spherical and can also realize circumferential rotation positioning to ensure the fitting of the internal threaded plate 3 and the external threaded tube 2. When the threaded rod 7 itself is rotated, the handle 8 is turned, and the rotary cylinder 19 drives the threaded rod 7 to rotate through the fixed block 18. When rotating around the external threaded rod 2, the handle 8 is pulled outward, and the rotary cylinder 19 slides out from the fixed block 18, thereby avoiding driving the threaded rod 7 to rotate around itself. After loosening, under the action of the spring 21, the rotary cylinder 19 returns to its original position and is sleeved on the fixed block 18. In this way, when the threaded rod 7 rotates around the external threaded tube 2, the threaded rod 7 will not rotate around its own axis, thereby ensuring the fitting effect of the internal threaded plate 3 and the external threaded tube 2.
[0045] 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 fracture reduction and distraction device combining rapidity and distraction force, comprising two left and right Kirschner wires (1) and a horizontal rightward externally threaded tube (2) connected to the left Kirschner wire (1), characterized in that: A telescopic mechanism capable of extending and retracting to the left and right and preventing rotation is provided between the externally threaded tube (2) and the Kirschner wire (1) on the right side, and the Kirschner wire (1) on the right side is connected to an internally threaded plate (3) capable of being attached to the externally threaded tube (2) to the left, the cross section of the internally threaded plate (3) being in an arc shape convenient for being attached to the externally threaded tube (2), and the internally threaded plate (3) being able to be attached to the external threads of the externally threaded tube (2) after being moved downward to achieve left-right transmission, and further comprising a pulling and closing mechanism provided between the internally threaded plate (3) and the externally threaded tube (2) and a guiding mechanism for radial guidance, the pulling and closing mechanism being used for attaching the internally threaded plate (3) and the externally threaded tube (2) to achieve threaded transmission, and the guiding mechanism ensuring that the internally threaded plate (3) is vertically attached to the externally threaded tube (2) along the radial direction.
2. The fracture reduction and distraction device combining rapidity and distraction force according to claim 1, characterized in that: The telescopic mechanism comprises a guide rod (4) which is inserted into the external threaded tube (2) and has a matching shape, and the inner cavity cross-section of the external threaded tube (2) is in the shape of a square to prevent rotation, and the other end of the guide rod (4) is connected to the Kirschner wire (1) on the right side.
3. The fracture reduction and distraction device combining rapidity and distraction force according to claim 2, characterized in that: The pulling and closing mechanism comprises a sliding mechanism sleeved on the external threaded tube (2) and a pulling mechanism for pulling the sliding mechanism and the internal threaded plate (3) together.
4. The fracture reduction and distraction device combining rapidity and distraction force according to claim 3, characterized in that: The sliding mechanism comprises an annular sliding sleeve (5) sleeved on the externally threaded tube (2), and the internally threaded plate (3) is recessed outwards to form a receiving portion (6) for receiving the sliding sleeve (5).
5. The fracture reduction and distraction device combining rapidity and distraction force according to claim 4, characterized in that: The tension mechanism comprises a threaded rod (7) rotatably connected to the sliding sleeve (5), and the threaded rod (7) is connected to a rotary handle (8) after passing through the accommodating portion (6), the threaded rod (7) is threadedly connected to the accommodating portion (6), and a threaded barrel that is sleeved on the threaded rod (7) and matches the threaded rod (7) is fixed on the accommodating portion (6).
6. The fracture reduction and distraction device combining rapidity and distraction force according to claim 5, characterized in that: The left and right ends of the sliding sleeve (5) respectively abut against the left and right walls of the inner cavity corresponding to the accommodating portion (6) to achieve guidance.
7. The fracture reduction and distraction device combining rapidity and distraction force according to claim 2, characterized in that: The guide mechanism comprises an annular rotating groove formed on the right side of the guide rod (4) in the circumferential direction and an annular rotating block (9) installed in the rotating groove, and the internal thread plate (3) extends rightward to form a rotating portion (10) capable of abutting against the rotating block (9) when moving downward, and a guide block (11) having a square cross-section and passing through the rotating portion (10) outwardly is fixed to the rotating block (9), and a guide sleeve (12) sleeved on the guide block (11) is fixed to the outer end of the rotating portion (10).
8. The fracture reduction and distraction device combining rapidity and distraction force according to claim 2, characterized in that: The invention also comprises a sphere (13) in the middle of which a Kirschner wire (1) is inserted, a socket in the middle of the sphere (13) for inserting the Kirschner wire (1), and a spherical shell (14) with upper and lower openings is sleeved on the outer side of the sphere (13), the socket extending outwardly forms a cannula (15) for inserting the Kirschner wire (1), a first tightening knob (16) capable of pressing against the Kirschner wire (1) being threadedly connected to the cannula (15), and a second tightening knob (17) with an inner end pressing against the sphere (13) being threadedly connected to the spherical shell (14), the left end of the externally threaded tube (2) being fixed to the spherical shell (14) on the left side, and the guide rod (4) being fixed to the spherical shell (14) on the right side.
9. The fracture reduction and distraction device combining rapidity and distraction force according to claim 7, characterized in that: The rotating groove extends rightward to the right spherical shell (14), and the right end of the rotating block (9) is spherical and fits the right spherical shell (14) to achieve right end guiding and positioning.
10. The fracture reduction and distraction device combining rapidity and distraction force according to claim 5, characterized in that: A square fixing block (18) is fixed to the upper end of the threaded rod (7), and a rotating cylinder (19) is sleeved on the fixing block (18), the other end of which is fixed on the rotating handle (8). A circular guide hole extending into the interior of the threaded rod (7) is formed on the fixing block (18), and an anti-slip rod (20) fixed on the rotating handle (8) is inserted into the guide hole. The fixing block (18) and the rotating handle (8) are connected via a spring (21) sleeved on the anti-slip rod (20).
Citation Information
Patent Citations
Calcaneal posterior knot fixator for orthopedics department
CN112603509A
Pelvic osteotomy spreader
CN113491546A