External fixation device for calcaneus

Abstract

The application relates to the technical field of medical devices, in particular to a calcaneus external fixing support, which comprises a first screw rod, a sliding base connected to the outer wall of the first screw rod in a sliding mode, a second screw rod connected to the first screw rod in a sliding mode, a sliding seat connected to the outer wall of the sliding base in a sliding mode, the sliding direction of the sliding seat is arranged at an angle with the moving direction of the sliding base, the second screw rod is arranged at an angle with the first screw rod, a limiting assembly for limiting the sliding of the sliding base is arranged on the outer wall of the first screw rod, a first locking piece for limiting the sliding of the sliding seat is arranged on the side wall of the sliding seat, a positioning assembly for limiting the sliding of the second screw rod is arranged on the first screw rod, a second locking piece for fixing a bone needle is arranged on the side wall of the moving seat, and a third locking piece for fixing the bone needle is arranged on the outer wall of the second screw rod. The application has the effects of conveniently adjusting the structure of the heel of a patient and reducing the dislocation of the heel structure in the process of fixing the support.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a calcaneal external fixation bracket. Background Art

[0002] Calcaneus fractures are the most common tarsal fractures, accounting for 60% of tarsal fractures and 2% of all fractures. Treatment is difficult and can lead to numerous sequelae. External fixation is a crucial orthopedic device used to directly treat common fractures and correct certain bone deformities.

[0003] Publication number CN204274610U describes a calcaneal traction brace, comprising a base plate and two support plates. These plates are acrylic, perpendicular to the base plate and symmetrically arranged at either end. The two plates form a one-piece structure, each with a trapezoidal structure and a U-shaped groove at the center of its upper end. When installing the brace, after the doctor corrects the patient's fracture and reduces it, they first manually maintain the reduction position, while another doctor selects the needle insertion position and angle to insert the bone needles, securing the traction brace.

[0004] When installing the above-mentioned traction support on the patient, the cooperation of multiple doctors is required, and the doctors are required to use their hands to maintain the reset position of the patient's heel. Due to human factors during the process of the doctor's hand support, there will inevitably be slight shaking, which may cause the corrected patient's heel to be dislocated. There is room for improvement. Summary of the Invention

[0005] In order to facilitate staff to reposition the patient's heel structure, fix the position of the patient's heel after repositioning, and reduce the possibility of dislocation during the process of fixing the heel structure, the present application provides a calcaneal external fixation bracket.

[0006] The present application provides a calcaneal external fixation bracket, which adopts the following technical solution:

[0007] The cam is secured to a position 400 meters high and has a locking mechanism which allows the cam to move relative to the first support rod and to engage with the locking mechanism, the cam being secured to a position 500 meters high and capable of holding the cam in a position where the cam is locked.

[0008] By adopting the above technical solution, the staff pre-opens a fixing hole in the patient's heel, inserts a bone needle into the fixing hole, and fixes the bone needle inserted into the fixing hole by means of the second locking piece and the third locking piece. The staff drives the sliding base to slide, adjusts the position of the sliding base, drives the second screw to slide, so that the relative position of the second screw and the first screw changes, drives the sliding seat to slide, so that the relative position of the sliding seat changes, adjusts the positions of the sliding base, the sliding seat and the second screw, drives the bone needle to move, thereby adjusting the patient's calcaneus. After the adjustment is completed, the first locking piece limits the sliding of the sliding base, the positioning assembly limits the position of the second screw, and the first locking piece limits the sliding of the sliding seat, thereby fixing the bracket to the patient's calcaneus. The bracket is fixed to the calcaneus in advance, and then the structure of the calcaneus is adjusted to reduce the possibility of dislocation of the calcaneus structure during the process of fixing the bracket.

[0009] Optionally, a snap-in groove is provided on the side wall of the sliding base, and the limiting assembly includes a lifting knob threadedly connected to the outer wall of the first screw and a first locking pin threadedly connected to the sliding base, the first locking pin can abut against the outer wall of the first screw, and the lifting knob is rotatably connected to the snap-in groove on the side close to the sliding base.

[0010] By adopting the above technical solution, the first locking pin is loosened, and the staff turns the lifting knob, which slides on the outer wall of the first screw, driving the sliding base to slide on the first screw, and adjusting the position of the sliding base on the first screw. After completing the adjustment of the position of the sliding base, the lifting knob is engaged with the engaging groove, and the first locking pin is tightened, so that the first locking pin abuts against the outer wall of the first screw, limiting the sliding of the sliding base, thereby making the fixation of the bone needle more stable.

[0011] Optionally, a limiting groove is provided at the end of the first screw, and the positioning assembly includes a rotating knob threadedly connected to the outer wall of the second screw and a second locking pin threadedly connected to the first screw, the end of the second locking pin can abut against the outer wall of the second screw, and the rotating knob is rotatably connected to the inner wall of the limiting groove on the side close to the first screw.

[0012] By adopting the above technical solution, the second locking pin is loosened and the rotating knob is turned, and the rotating knob slides on the outer wall of the second screw, so that the position of the second screw and the first screw changes. After the adjustment of the second screw is completed, the second locking pin is tightened so that the second locking pin abuts against the outer wall of the second screw, limiting the sliding of the second screw, thereby making the fixation of the bone needle more stable.

[0013] Optionally, mounting grooves are provided on both side walls of the sliding seat, and the second locking member includes a left clamping block, a right clamping block and several locking screws, the left clamping block is located in one of the mounting grooves, and the right clamping block is located in the other mounting groove, and the left clamping block and the right clamping block are both fixed in the mounting grooves by the locking screws.

[0014] By adopting the above technical solution, the staff puts the bone needle into the installation groove, fixes the left clamping block in the installation groove by locking the screw, and fixes the bone needle under the clamping of the left clamping block; fixes the right clamping block in the installation groove by locking the screw, and the right clamping block clamps the bone needle, thereby fixing the bone needle passed through the sliding seat.

[0015] Optionally, the third locking member includes an upper clamping block and a positioning pin, the upper clamping block is fixed to the outer wall of the second screw rod through the positioning pin, and the bone needle is located between the upper clamping block and the second screw rod.

[0016] By adopting the above technical solution, the bone needle is pre-installed between the upper clamping block and the second screw, and the positioning pin is tightened so that the positioning pin is threadedly connected to the second screw, thereby fixing the bone needle under the clamping of the upper clamping block.

[0017] Optionally, a scale surface is provided on the outer wall of each of the first screw and the second screw, the scale surface is provided along the length direction of the first screw, and scale lines are provided on the side walls of the scale surface.

[0018] By adopting the above technical solution, when the staff tightens the first locking pin, the first locking pin contacts the scale surface, making the contact between the first locking pin and the first screw more stable; tightening the second locking pin causes the end of the second locking pin to contact the scale surface, making the contact between the second locking pin and the second screw more stable. The provision of the scale line makes it easier for the staff to know the sliding distance of the sliding base on the first screw, and the sliding distance of the second screw on the first screw, thereby making the adjustment of the sliding base and the second screw more precise.

[0019] Optionally, a receiving frame is fixed on the side wall of the sliding seat, a supporting frame is slidably connected to the receiving frame, and a driving component for driving the receiving frame and the supporting frame to slide is provided on the side wall of the supporting frame.

[0020] By adopting the above technical solution, after the bracket is fixed to the patient's heel, the patient needs to use crutches to assist in walking. The setting of the support frame is convenient for the patient to use leverage, and the driving component drives the receiving frame to slide on the support frame, thereby adjusting the distance between the first screw and the end of the support frame, so that the distance between the patient's foot and the ground changes, making the patient's walking more comfortable.

[0021] Optionally, the driving assembly includes a spiral rod fixed on the support frame and a driving block rotatably connected to the receiving frame, the driving block is arranged in a conical shape, the driving block is threadedly engaged with the spiral rod, and a rotating pin for driving the driving block to rotate is provided on the side wall of the driving block, and the rotating pin is fixedly connected to the driving block.

[0022] By adopting the above technical solution, the staff rotates the rotating pin with a screwdriver, and the rotating pin drives the driving block to rotate. The driving block cooperates with the screw rod thread, thereby driving the receiving frame to slide on the supporting frame, thereby adjusting the distance between the receiving frame and the end of the supporting frame.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The staff opens a fixing hole on the patient's heel in advance, inserts a bone needle into the fixing hole, fixes the bone needle on the sliding seat with the second locking piece, and fixes the bone needle close to the second screw with the third locking piece on the second screw. Then the sliding base is driven to slide on the first screw, the sliding seat is driven to slide on the sliding base, and the second screw is driven to slide on the first screw. The patient's calcaneus is adjusted through the bone needle. After the adjustment is completed, the limit assembly limits the sliding of the sliding base, the first locking piece limits the sliding of the sliding seat, and the positioning assembly limits the sliding of the second screw, thereby completing the fixation of the bracket. This method of fixing the bracket by first fixing and then adjusting reduces the possibility of dislocation of the patient's calcaneus.

[0025] 2. The setting of the scale surface makes the abutment between the first lock pin and the outer wall of the first screw more stable, and the abutment between the second lock pin and the outer wall of the second screw more stable, thereby making the fixation between the sliding base and the first screw more stable, and the fixation between the second screw and the first screw more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the bracket in Example 1 of the present application.

[0027] Figure 2 It is a schematic diagram of the overall structure of the bracket in Example 1 of the present application, used to show the structure on the second screw.

[0028] Figure 3 It is a schematic diagram of the overall structure of the bracket in Example 2 of the present application.

[0029] Figure markings: 1. first screw; 2. sliding base; 3. second screw; 4. sliding seat; 5. limiting assembly; 6. first locking member; 7. positioning assembly; 8. second locking member; 9. third locking member; 10. fixing block; 11. clamping groove; 12. lifting knob; 13. first locking pin; 14. limiting groove; 15. rotating knob; 16. second locking pin; 17. mounting groove; 18. left clamping block; 19. dovetail groove; 20. connecting block; 21. positioning groove; 22. sliding groove; 23. fixing groove; 24. right clamping block; 25. locking screw; 26. upper clamping block; 27. positioning pin; 28. scale surface; 29. ​​scale line; 30. receiving frame; 31. supporting frame; 32. driving assembly; 33. screw rod; 34. driving block; 35. rotating pin; 36. sleeve DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses a calcaneal external fixation bracket.

[0032] Example 1:

[0033] Reference Figure 1 A calcaneal external fixation bracket includes a first screw 1, a sliding base 2 slidably connected to the outer wall of the first screw 1, and a second screw 3 slidably connected to the end of the first screw 1. In this application, the first screw 1 and the second screw 3 are arranged vertically, and a limiting component 5 for limiting the sliding of the sliding base 2 is provided on the outer wall of the first screw 1, and a positioning component 7 for limiting the sliding of the second screw 3 is provided on the outer wall of the first screw 1. The sliding of the sliding base 2 and the second screw 3 facilitates the correction of the patient's calcaneus. Under the restriction of the limiting component 5 and the positioning component 7, the fixation of the patient's calcaneus is more stable.

[0034] Reference Figure 1 A snap-in groove 11 is provided on the side wall of the sliding base 2, and the opening direction of the snap-in groove 11 is perpendicular to the length direction of the first screw rod 1. The limiting assembly 5 includes a lifting knob 12 threadedly connected to the outer wall of the first screw rod 1, and a threaded hole is provided on the side wall of the sliding base 2, and the opening direction of the threaded hole is perpendicular to the length direction of the first screw rod 1. The limiting assembly 5 also includes a first locking pin 13 threadedly connected to the threaded hole, and the side of the lifting knob 12 close to the sliding base 2 is located in the snap-in groove 11. The staff loosens the first locking pin 13 in advance and rotates the lifting knob 12 to make the lifting knob 12 slide on the first screw rod 1, driving the sliding base 2 to slide on the first screw rod 1. After completing the adjustment of the position of the sliding base 2, the first locking pin 13 is tightened so that the end of the first locking pin 13 abuts against the outer wall of the first screw rod 1, thereby limiting the sliding of the sliding base 2.

[0035] Reference Figure 1 Figure 2 A fixing block 10 is integrally fixed to the end of the first screw rod 1. The fixing block 10 and the first screw rod 1 are arranged in a colinear manner. In this application, the fixing block 10 is cylindrical, and a limiting groove 14 is provided on the side wall of the fixing block 10. The positioning assembly 7 includes a rotating knob 15 threadedly connected to the outer wall of the second screw rod 3. The side of the rotating knob 15 close to the fixing block 10 is located in the limiting groove 14. A threaded hole is provided at the end of the fixing block 10. The positioning assembly 7 preferably includes a second locking pin 16 threadedly connected in the threaded hole. When the staff rotates the rotating knob 15, the rotating knob 15 is rotationally connected to the limiting groove 14, and the rotating knob 15 slides on the second screw rod 3, driving the fixing block 10 to slide on the second screw rod 3, thereby achieving adjustment of the position of the second screw rod 3.

[0036] Reference Figure 1 Figure 2 A dovetail groove 19 is provided at the end of the sliding base 2, and the sliding base 2 is slidably connected to the sliding base 4 at one end near the dovetail groove 19. In this application, the sliding seat 4 is in the shape of a rectangular parallelepiped, and two sliding grooves 22 are provided on the side wall of the sliding seat 4. The dovetail groove 19 and the convex sliding connection formed by the two sliding grooves 22 are provided. A fixing groove 23 is provided through the side wall of the sliding seat 4, and a first locking member 6 for limiting the sliding of the sliding seat 4 is provided on the side wall of the sliding seat 4. The first locking member 6 includes a fixing pin slidably connected to the fixing groove 23. In this application, the shape of the fixing pin is cylindrical, and the fixing pin is threadedly connected to the side wall of the sliding base 2. The staff drives the sliding seat 4 to slide and adjusts the relative position of the sliding seat 4 and the sliding base 2. After completing the adjustment of the position of the sliding seat 4, the fixing pin is tightened to limit the sliding of the sliding seat 4.

[0037] Reference Figure 1 Figure 2A second locking member 8 for fixing the bone needle is provided on the side wall of the sliding seat 4. After the staff inserts the bone needle into the patient's calcaneus, the second locking member 8 is used to fix the bone needle. There are mounting grooves 17 on both side walls of the sliding seat 4, and several positioning holes are provided on the inner wall of the mounting groove 17. In this application, two positioning holes are provided on the inner wall of one mounting groove 17, and the second locking member 8 includes a left clamping block 18, a right clamping block 24 and several locking screws 25. The left clamping block 18 is located in the mounting groove 17 on the left side of the sliding seat 4, and the right clamping block 24 is located in the mounting groove 17 on the right side of the sliding seat 4. The left clamping block 18 is rotatably connected to the two locking screws 25, and the right clamping block 24 is rotatably connected to the two locking screws 25. The left clamping block 18 is provided with two positioning holes on the side facing the inner wall of the mounting groove 17, and the right clamping block 24 is provided with two positioning holes on the side facing the inner wall of the mounting groove 17. The staff inserts the bone needle into the positioning hole and tightens the locking screw 25 on the sliding seat 4 to fix the bone needle under the clamping of the two positioning holes.

[0038] Reference Figure 1 Figure 2 The end of the second screw 3 is integrally fixed to the connecting block 20. In this application, the connecting block 20 is cylindrical in shape, and a positioning groove 21 is provided on the side wall of the connecting block 20. A positioning hole is provided on the inner wall of the positioning groove 21. A third locking member 9 for fixing the bone needle is provided on the outer wall of the second screw 3. The third locking member 9 includes an upper clamping block 26 and a positioning pin 27 rotatably connected to the clamping block 18. In this application, two positioning pins 27 are provided, and the positioning pins 27 are threadedly connected to the connecting block 20. Two positioning holes are provided on the side of the upper clamping block 26 facing the positioning groove 21. The staff inserts the bone needle into the cylindrical hole formed by the upper clamping block 26 and the positioning holes on the inner wall of the positioning groove 21, and tightens the positioning pin 27 to fix the bone needle.

[0039] Reference Figure 1 Figure 2 The outer walls of the first screw rod 1 and the second screw rod 3 are both provided with a scale surface 28. The scale surface 28 on the first screw rod 1 is parallel to the length direction of the first screw rod 1, and the scale surface 28 on the second screw rod 3 is parallel to the length direction of the second screw rod 3. After the staff tightens the first locking pin 13 and the second locking pin 16, the first locking pin 13 abuts against the scale surface 28 on the first screw rod 1, and the second locking pin 16 abuts against the scale surface 28 on the second screw rod 3, thereby making the fixation of the sliding base 2 and the second screw rod 3 more stable.

[0040] Reference Figure 1 Figure 2, scale lines 29 are provided on the scale surface 28. The staff can refer to the scale surface 28 when turning the lifting knob 12, so that the sliding distance of the sliding base 2 on the first screw 1 is constant; when turning the rotating knob 15, refer to the scale line 29 on the second screw 3, so that the relative position of the first screw 1 and the second screw 3 is constant, so that the staff can adjust the patient's calcaneus more accurately.

[0041] Example 1 of the present application: The implementation principle of a calcaneal external fixation bracket is as follows: the staff pre-opens a fixing hole on the patient's heel, inserts a bone needle into the fixing hole, inserts the bone needle in the length direction of the patient's foot into the sliding seat 4, tightens the locking screw 25 to fix the bone needle; inserts the bone needle in the width direction of the patient's foot into the connecting block 20, tightens the positioning pin 27, and completes the fixation of the bone needle. Loosen the fixing pin to drive the sliding seat 4 to slide on the sliding base 2, and adjust the position of the sliding seat 4. After completing the adjustment of the position of the sliding seat 4, tighten the fixing pin to limit the sliding of the sliding seat 4; turn the lifting knob 12 to drive the sliding base 2 to slide, and refer to the scale line 29 on the outer wall of the first screw 1 to accurately adjust the position of the sliding base 2. After completing the sliding of the sliding base 2, tighten the first locking pin 13 to limit the sliding of the sliding base 2; turn the rotating knob 15 to make the first screw 1 and the second screw 3 slide. After completing the position adjustment of the second screw 3, tighten the second locking pin 16 to limit the sliding of the second screw 3, thereby achieving the adjustment of the calcaneus and the fixation of the bracket.

[0042] Example 2:

[0043] Example 2: The difference from Example 1 is: Figure 3 A support frame 30 is fixed to the side of the sliding base 2 facing away from the sliding base 4 by screws. A support frame 31 is slidably connected to the side wall of the support frame 30. A driving assembly 32 is provided on the side wall of the support frame 31 for driving the support frame 30 to slide on the support frame 31. After the bracket is fixed to the patient's foot, the driving assembly 32 drives the support frame 30 to slide and adjust the position of the support frame 30. The patient walks with the assistance of crutches and the support frame 31.

[0044] Reference Figure 3A sleeve 36 is welded and fixed on the receiving frame 30, and the sleeve 36 is slidingly connected to the outer wall of the support frame 31. The driving assembly 32 includes a spiral rod 33 coaxially fixed on the support frame 31 and a driving block 34 rotatably connected to the end of the receiving frame 30. In this application, the driving block 34 is a frustum, and the driving block 34 is threadedly engaged with the spiral rod 33. A rotating pin 35 for driving the driving block 34 to rotate is welded and fixed on the driving block 34. When the staff rotates the driving block 34, the driving block 34 slides along the spiral groove of the spiral rod 33, thereby realizing the adjustment of the position of the receiving frame 30, making it convenient for the patient to adjust the height of the receiving frame 30, and making it more convenient for the patient to walk.

[0045] Embodiment 2 of the present application; The implementation principle of a calcaneal external fixation bracket is: after fixing the bracket to the patient's foot according to the principle of embodiment 1, the driving block 34 is rotated according to the patient's needs, so that the driving block 34 slides along the outer wall of the spiral rod 33, so that the height of the receiving frame 30 changes, making it convenient for the patient to adjust the height of the foot from the ground during walking.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A calcaneal external fixator, characterized in that: The invention comprises a first screw rod (1), a sliding base (2) slidably connected to the outer wall of the first screw rod (1), and a second screw rod (3) slidably connected to the first screw rod (1); a sliding seat (4) is slidably connected to the outer wall of the sliding base (2); the sliding direction of the sliding seat (4) is set at an angle to the moving direction of the sliding base (2); the second screw rod (3) is set at an angle to the first screw rod (1); a limiting component (5) for limiting the sliding of the sliding base (2) is provided on the outer wall of the first screw rod (1); a first locking member (6) for limiting the sliding of the sliding seat (4) is provided on the side wall of the sliding seat (4); a positioning member (7) for limiting the sliding of the second screw rod (3) is provided on the first screw rod (1); a second locking member (8) for fixing the bone needle is provided on the side wall of the moving seat; and a third locking member (9) for fixing the bone needle is provided on the outer wall of the second screw rod (3).

2. The calcaneal external fixator according to claim 1, characterized in that: A snap-fit ​​groove (11) is provided on the side wall of the sliding base (2), and the limiting assembly (5) includes a lifting knob (12) threadedly connected to the outer wall of the first screw rod (1) and a first locking pin (13) threadedly connected to the sliding base (2), the first locking pin (13) can abut against the outer wall of the first screw rod (1), and the lifting knob (12) is rotatably connected to the snap-fit ​​groove (11) on the side close to the sliding base (2).

3. The calcaneal external fixator according to claim 1, characterized in that: A limiting groove (14) is provided at the end of the first screw (1), and the positioning assembly (7) comprises a rotating knob (15) threadedly connected to the outer wall of the second screw (3) and a second locking pin (16) threadedly connected to the first screw (1), the end of the second locking pin (16) can abut against the outer wall of the second screw (3), and the rotating knob (15) is rotatably connected to the inner wall of the limiting groove (14) on the side close to the first screw (1).

4. The calcaneal external fixator according to claim 3, characterized in that: The side walls of both sides of the sliding seat (4) are provided with mounting grooves (17), and the second locking member (8) includes a left clamping block (18), a right clamping block (24) and a plurality of locking screws (25). The left clamping block (18) is located in one of the mounting grooves (17), and the right clamping block (24) is located in the other mounting groove (17). The left clamping block (18) and the right clamping block (24) are both fixed in the mounting grooves (17) by the locking screws (25).

5. The calcaneal external fixator according to claim 1, characterized in that: The third locking member (9) comprises an upper clamping block (26) and a positioning pin (27), wherein the upper clamping block (26) is fixed to the outer wall of the second screw rod (3) via the positioning pin (27), and the bone needle is located between the upper clamping block (26) and the second screw rod (3).

6. The calcaneal external fixator according to claim 1, characterized in that: The outer walls of the first screw (1) and the second screw (3) are both provided with scale surfaces (28), the scale surfaces (28) are provided along the length direction of the first screw (1), and scale lines (29) are provided on the side walls of the scale surfaces (28).

7. The calcaneal external fixator according to claim 1, characterized in that: A receiving frame (30) is fixed on the side wall of the sliding seat (4), a support frame (31) is slidably connected to the receiving frame (30), and a driving component (32) for driving the receiving frame (30) and the support frame (31) to slide is provided on the side wall of the support frame (31).

8. The calcaneal external fixator according to claim 7, characterized in that: The driving assembly (32) includes a screw rod (33) fixed on the support frame (31) and a driving block (34) rotatably connected to the receiving frame (30); the driving block (34) is arranged in a conical shape, the driving block (34) is threadedly engaged with the screw rod (33), and a rotating pin (35) for driving the driving block (34) to rotate is provided on the side wall of the driving block (34); the rotating pin (35) is fixedly connected to the driving block (34).

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