A device for removing a tail of a pedicle screw in orthopedics

Abstract

The application relates to the technical field of medical devices, in particular to a tail tooth taking-out device for a vertebral pedicle screw in orthopedics, which comprises a warped block, a sliding table is arranged on the warped block, the sliding table is in sliding fit with a sliding rod, a connecting shaft is arranged in the warped block, the connecting shaft is in rotary fit with a transmission rod, a driving block is slidably arranged in the warped block, the driving block is connected with a second spring, the second spring is connected with a clamping block, the driving block is connected with a transmission block, the transmission block penetrates through a limiting groove and is in sliding fit with a transmission groove, and a driven block is connected with a first spring and an abutting block. The transmission rod can be driven to rotate by pushing and pulling the sliding rod, the driving block and the driven block can be driven to move at different times in the process of rotating the transmission rod, meanwhile, the driving block can drive the second spring and the clamping block to move synchronously and complete the clamping and taking-off operation of a tail tooth body; the driven block can drive the first spring and the abutting block to move synchronously and guide the instant breaking of the tail tooth body.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device for removing the coccyx screw in orthopedics. Background Technology

[0002] Pedicle screws are widely used in the surgical treatment of spinal diseases. After the connecting rod is installed, breaking the tail end of the pedicle screw is an important step in the surgery. A tail end breaker is commonly used in the process of breaking the screw tail.

[0003] Existing coccyx tooth breakers have the following problems during operation: when breaking the coccyx, the broken part of the coccyx will deform along with the bending angle of the breaker. After the breaker breaks the coccyx, the bent and deformed coccyx is very easy to get stuck in the breaker. That is, pulling out the coccyx from the breaker requires the cooperation of other medical staff, which is difficult to operate. Therefore, we propose a coccyx tooth removal device for orthopedic pedicle screws. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for quickly clamping and removing the coccyx screw in orthopedic pedicle screws, thereby improving the efficiency of coccyx screw breakage.

[0005] The objective of this invention can be achieved through the following technical solutions: A device for removing the coccyx screw in orthopedics includes a lifting block with a clamping groove and a sliding platform. The sliding platform has a sliding groove that slides with a sliding rod. The lifting block has a clamping slot that communicates with the clamping groove. The clamping slot and the sliding groove are connected via a connecting groove. A connecting shaft is fixedly installed in the connecting groove and rotates with the middle of a transmission rod. A connecting ring is fitted onto one end of the sliding rod. An active block is slidably installed in the clamping slot, and a rotating platform is mounted on the active block. Both ends of the transmission rod are rotatably connected to the connecting ring and the rotating platform, respectively. The active block is connected to one end of a second spring, and the other end of the second spring is connected to the clamping block. The rocker block has a stop groove located below the clamping block groove. A limit groove is provided at the top of the stop groove. A transmission block is connected to the driving block. A driven block is slidably installed in the stop groove. A transmission groove is provided on the driven block. The transmission block passes through the limit groove and slides with the transmission groove. The driven block is connected to one end of the first spring. The other end of the first spring is connected to the moving block. An abutment block is installed on the moving block. The sliding table has a clamping platform on its sliding opening. The inner wall of the clamping platform is fitted with the sliding rod, and the external thread of the clamping platform is threadedly connected to the internal thread of the threaded ring.

[0006] As a further optimization or improvement of this solution, a circular groove is provided on the lifting block, the circular groove is connected to the clamping groove and is located below the clamping groove, and a locking tooth is provided on the inner wall of the clamping groove, the locking tooth and the abutting block both abut against the breaking groove.

[0007] As a further optimization or improvement of this solution, the clamping block is arc-shaped at one end near the clamping groove, and the clamping block fits the tail tooth body.

[0008] As a further optimization or improvement of this solution, both the clamping platform and the threaded ring are frustum-shaped, and a through groove is provided on the clamping platform.

[0009] As a further optimization or improvement to this solution, the diameter of the circular groove is larger than the diameter of the clamping groove.

[0010] As a further optimization or improvement of this solution, a frustum-shaped connecting platform is provided at one end of the sliding rod located in the sliding groove, and an annular groove is provided on the connecting platform, which slides in cooperation with the connecting ring.

[0011] The beneficial effects of this invention are: (1) By pushing and pulling the sliding rod, the sliding rod moves along the direction of the sliding groove. When the sliding rod is pushed, the sliding rod moves into the sliding groove. At this time, the sliding rod is rotatably connected to the transmission rod through the connecting ring. While pushing the sliding rod, the connecting ring can drive the transmission rod to rotate. At the same time, the transmission rod can pull the active block through the lever principle, so that the active block can drive the clamping block to move into the clamping block groove through the second spring. At this time, the clamping block releases the clamping of the tail tooth body, and it is easy to remove the broken tail tooth body. When the sliding rod is pulled, the sliding rod moves outward of the sliding groove. While pulling the sliding rod, the connecting ring can drive the transmission rod to rotate. At the same time, the transmission rod can push the active block, so that the active block can drive the clamping block to move outward of the clamping block groove, so that the clamping block clamps the tail tooth body. By pushing and pulling the sliding rod, the tail tooth body is loosened and clamped, thereby improving the breaking efficiency of the tail tooth body.

[0012] (2) By pressing down the sliding rod, the lever principle is used to make the sliding rod drive the rocker to lift up and break the tail tooth body, reducing the bending deformation of the tail tooth body during the breaking process, avoiding the tail tooth body from getting stuck in the device, and the broken tail tooth body can be removed by pushing the sliding rod. It is convenient to operate and the structure is labor-saving.

[0013] (3) During the process of the active block pushing the clamping block to clamp the tail tooth body, the active block slides with the transmission block on the active block, thereby causing the active block to drive the driven block to compress the first spring, so that the abutting block abuts against the breakage groove and the first spring stores force on the abutting block. At the moment when the tail tooth body breaks along the breakage groove, the abutting block is ejected from the breakage opening of the tail tooth body, so that the abutting block moves between the tail tooth body and the breakage groove, thereby guiding the breakage process of the tail tooth body, ensuring that the tail tooth body breaks along the breakage groove, avoiding the situation of incomplete breakage of the tail tooth body. At the same time, during the breakage process of the tail tooth body, the abutting block can remove burrs on the breakage opening and improve the flatness of the breakage opening. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the rocker block structure.

[0017] Figure 3 This is a schematic diagram of the internal structure of the rocker block.

[0018] Figure 4 This is a schematic diagram of the connection structure between the transmission rod and the driving block.

[0019] Figure 5 This is a schematic diagram of the clamping block groove and the abutment block groove.

[0020] Figure 6 This is a schematic diagram of the working state of the present invention.

[0021] Figure 7 This is a schematic diagram of the working state of the present invention.

[0022] Figure 8 This is a schematic diagram of the connection structure between the clamping platform and the threaded ring.

[0023] The following are labeled in the diagram: 1. Tilt block; 2. Clamping groove; 3. Sliding table; 4. Sliding rod; 5. Circular groove; 6. Sliding groove; 7. Clamping table; 8. Threaded ring; 9. Connecting ring; 10. Transmission rod; 11. Connecting shaft; 12. Driving block; 13. Rotating table; 14. Transmission block; 15. Second spring; 16. Clamping block; 17. Driven block; 18. Transmission groove; 19. First spring; 20. Moving block; 21. Abutting block; 22. Clamping block groove; 23. Abutting block groove; 24. Limiting groove; 25. Connecting groove; 26. Locking tooth; 27. Tail tooth body; 28. Breaking groove; 29. ​​Cutting groove. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] See Figures 1-8 A device for removing the coccyx screw in orthopedics includes a lifting block 1, a clamping groove 2 on the lifting block 1, a sliding platform 3 on the lifting block 1, a sliding groove 6 inside the sliding platform 3, the sliding groove 6 slidingly engaging with a sliding rod 4, a clamping block groove 22 inside the lifting block 1, the clamping block groove 22 communicating with the clamping groove 2, the clamping block groove 22 and the sliding groove 6 communicating through a connecting groove 25, a connecting shaft 11 fixedly installed in the connecting groove 25, the connecting shaft 11 rotatably engaging with the middle part of a transmission rod 10, a connecting ring 9 sleeved on one end of the sliding rod 4, an active block 12 slidably installed in the clamping block groove 22, a rotating platform 13 on the active block 12, both ends of the transmission rod 10 rotatably connected to the connecting ring 9 and the rotating platform 13 respectively, the active block 12 connected to one end of a second spring 15, and the other end of the second spring 15 connected to a clamping block 16; The rocker block 1 has a stop groove 23, which is located below the clamping block groove 22. The top of the stop groove 23 has a limit groove 24. The driving block 12 is connected to a transmission block 14. The driven block 17 is slidably installed in the stop groove 23. The driven block 17 has a transmission groove 18. The transmission block 14 passes through the limit groove 24 and slides with the transmission groove 18. The driven block 17 is connected to one end of the first spring 19. The other end of the first spring 19 is connected to the moving block 20. The moving block 20 is equipped with a stop block 21. The sliding port of the sliding table 3 is provided with a clamping platform 7, the inner wall of the clamping platform 7 is in contact with the sliding rod 4, and the external thread of the clamping platform 7 is threadedly connected to the internal thread of the threaded ring 8.

[0026] It should be noted that in this design, the sliding rod 4 drives the transmission rod 10 to rotate. During the rotation of the transmission rod 10, the driving block 12 and the driven block 17 move in a time-sharing manner. Simultaneously, the driving block 12 drives the second spring 15 and the clamping block 16 to move synchronously and complete the clamping and removal operation of the tail tooth body 27. The driven block 17 drives the first spring 19 and the abutment block 21 to move synchronously and guide the tail tooth body 27 at the moment of breakage. The time-sharing operation of the driving block 12 and the driven block 17 ensures that the second spring 15 and the first spring 19 can be compressed to the optimal range, ensuring that the clamping block 16 can firmly clamp the tail tooth body 27 while the abutment block 21 can accumulate sufficient force to abut against the breakage groove 28.

[0027] See Figures 2-3 The lifting block 1 has a circular groove 5, which communicates with and is located below the clamping groove 2. The inner wall of the clamping groove 2 has locking teeth 26, which abut against the breaking groove 28 along with the abutting block 21. Specifically, the diameter of the circular groove 5 is larger than the diameter of the clamping groove 2.

[0028] It should be noted that when the clamping groove 2 on the pry bar 1 is placed on the tail tooth body 27 for the breakage operation, in order to prevent the pry bar 1 from hitting the nail seat at the bottom of the tail tooth body 27 during the breakage process, a circular groove 5 is opened at the bottom of the clamping groove 2. When the clamping groove 2 is placed on the tail tooth body 27, the nail seat at the bottom of the tail tooth body 27 is located in the circular groove 5, and the diameter of the circular groove 5 is much larger than the diameter of the clamping groove 2. When the tail tooth body 27 is broken, the movement trajectory of the pry bar 1 does not interfere with the nail seat.

[0029] See Figures 4-5 The clamping block 16 is arc-shaped at one end near the clamping groove 2, and the clamping block 16 fits against the tail tooth body 27. It should be noted that the clamping block 16 is driven by the active block 12. When the sliding rod 4 is pulled, the sliding rod 4 drives the transmission rod 10 to rotate through the connecting ring 9. The rotation of the transmission rod 10 can drive the active block 12 to push outward of the clamping block groove 22. At the same time, the second spring 15 is compressed, so that the second spring 15 drives the clamping block 16 to clamp the outer wall of the tail tooth body 27. The arc-shaped surface on the clamping block 16 can increase the contact area with the tail tooth body 27 and improve the clamping stability of the tail tooth body 27.

[0030] See Figure 8 Both the clamping platform 7 and the threaded ring 8 are frustum-shaped, and a through-cut groove 29 is provided on the clamping platform 7. It should be noted that the clamping platform 7 has a certain degree of elasticity. By twisting the threaded ring 8, the sliding rod 4 can be fixed. When the threaded ring 8 is twisted towards the sliding platform 3, the internal and external threads of the threaded ring 8 connect with the clamping platform 7, and the threaded ring 8 drives the clamping platform 7 to gradually close, so that the clamping platform 7 can fit against the outer wall of the sliding rod 4 and fasten it. When the threaded ring 8 is twisted in the opposite direction of the sliding platform 3, the threaded ring 8 drives the clamping platform 7 to gradually loosen, so that the clamping platform 7 gradually disengages from the sliding rod 4 and releases the fixation of the sliding rod 4.

[0031] See Figure 4 The sliding rod 4 has a frustum-shaped connecting platform at one end within the sliding groove 6. An annular groove is formed on the connecting platform, and the annular groove slides in conjunction with the connecting ring 9. It should be noted that a connecting hole is formed in the middle of the transmission rod 10, which is rotatably connected to the connecting shaft 11. Both ends of the transmission rod 10 are rotatably connected to the driving block 12 and the sliding rod 4 respectively via the rotating platform 13 and the connecting ring 9.

[0032] The operation steps of this invention are as follows: The first step is to place the clamping groove 2 on the pry bar 1 onto the tail tooth body 27, and clamp the tail tooth body 27 using the clamping block 16. The operation is as follows: Place the pry bar 1 onto the tail tooth body 27, then pull the sliding rod 4 to move it outward from the sliding groove 6. At this time, the sliding rod 4 is rotatably connected to the transmission rod 10 through the connecting ring 9. While pulling the sliding rod 4, the connecting ring 9 drives the transmission rod 10 to rotate. Simultaneously, the transmission rod 10, through the lever principle, can push the active block 12 to move outward from the clamping groove 22. During the movement of the active block 12, through the cooperation of the transmission block 14 and the transmission groove 18, the transmission... The moving block 14 begins to move from one end of the transmission groove 18. As the moving block 14 moves, the driving block 12 compresses the second spring 15, and the clamping block 16 gradually comes into contact with the tail tooth body 27. When the moving block 14 moves to the other end of the transmission groove 18, the transmission rod 10 can simultaneously push the driving block 12 and the driven block 17 to move. At this time, the driven block 17 gradually compresses the first spring 19, so that the abutting block 21 abuts against the break groove 28. When the clamping block 16 clamps and secures the tail tooth body 27, the threaded ring 8 is rotated. Through the threaded connection between the threaded ring 8 and the clamping table 7, the clamping table 7 is gradually tightened, so that the clamping table 7 clamps and limits the sliding rod 4.

[0033] The second step is to break the tail tooth body 27, which is to do the following: press down the sliding rod 4 to break the tail tooth body 27 using the lever principle. At the moment the tail tooth body 27 breaks along the break groove 28, the first spring 19 rebounds and drives the abutment block 21 to move along the break opening of the break groove 28, thereby guiding the break of the break groove 28 and ensuring the neatness of the break opening.

[0034] The third step is to remove the tail tooth body 27, which is done as follows: Tighten the threaded ring 8 to gradually loosen the clamping table 7 until it disengages from the sliding rod 4. Then push the sliding rod 4 into the sliding groove 6. At this time, the sliding rod 4 is rotatably connected to the transmission rod 10 through the connecting ring 9. While pushing the sliding rod 4, the connecting ring 9 drives one end of the transmission rod 10 to rotate. At the same time, the other end of the transmission rod 10 can drive the active block 12 to pull into the clamping block groove 22. Meanwhile, the active block 12 can drive the clamping block 16 to move into the clamping block groove 22 through the second spring 15, so that the clamping block 16 releases its clamping of the tail tooth body 27, and then removes the tail tooth body 27. The operation is simple, time-saving and labor-saving.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for removing the coccyx screw in orthopedic pedicle screws, characterized in that: It includes a rocker block (1), on which a clamping groove (2) is provided, and a sliding table (3) is provided on the rocker block (1). A sliding groove (6) is provided in the sliding table (3), and the sliding groove (6) is slidably engaged with a sliding rod (4). A clamping groove (22) is provided inside the rocker block (1), and the clamping groove (22) is connected to the clamping groove (2). The clamping groove (22) and the sliding groove (6) are connected through a connecting groove (25). A connecting shaft (11) is fixedly installed in the connecting groove (25). The connecting shaft (11) is rotatably engaged with the middle part of the transmission rod (10). One end of the sliding rod (4) is fitted with a connecting ring (9). An active block (12) is slidably installed in the clamping block groove (22). A rotating platform (13) is provided on the active block (12). The two ends of the transmission rod (10) are rotatably connected to the connecting ring (9) and the rotating platform (13) respectively. The active block (12) is connected to one end of the second spring (15), and the other end of the second spring (15) is connected to the clamping block (16). The rocker block (1) has a stop groove (23) inside, which is located below the clamping block groove (22). A limit groove (24) is provided at the top of the stop groove (23). A transmission block (14) is connected to the active block (12). A driven block (17) is slidably installed in the stop groove (23). A transmission groove (18) is provided on the driven block (17). The transmission block (14) passes through the limit groove (24) and slides with the transmission groove (18). The driven block (17) is connected to one end of the first spring (19). The other end of the first spring (19) is connected to the moving block (20). An abutment block (21) is installed on the moving block (20). The sliding table (3) has a clamping table (7) on its sliding opening. The inner wall of the clamping table (7) is in contact with the sliding rod (4). The external thread of the clamping table (7) is threadedly connected to the internal thread of the threaded ring (8).

2. The device for removing the coccyx screw in orthopedics according to claim 1, characterized in that: The lifting block (1) has a circular groove (5) which is connected to the clamping groove (2) and located below the clamping groove (2). The inner wall of the clamping groove (2) is provided with a locking tooth (26), which abuts the breaking groove (28) with the abutting block (21).

3. The device for removing the coccyx screw in orthopedics according to claim 1, characterized in that: The clamping block (16) is arc-shaped at one end near the clamping groove (2), and the clamping block (16) fits the tail tooth body (27).

4. The device for removing the coccyx screw in orthopedics according to claim 1, characterized in that: Both the clamping platform (7) and the threaded ring (8) are frustum-shaped, and a through groove (29) is provided on the clamping platform (7).

5. The device for removing the coccyx screw in orthopedics according to claim 2, characterized in that: The diameter of the circular groove (5) is larger than the diameter of the clamping groove (2).

6. The device for removing the coccyx screw in orthopedics according to claim 1, characterized in that: The sliding rod (4) has a frustum-shaped connecting platform at one end located in the sliding groove (6). An annular groove is provided on the connecting platform, and the annular groove slides in conjunction with the connecting ring (9).

Images