Steering hollow scraping tooth

Abstract

The utility model relates to the field of medical scraping teeth, in particular to a steering hollow scraping tooth which comprises a handle, a connecting rod is rotatably arranged at the end of the handle, a first scraping tooth is fixed at the end of the connecting rod, a pair of second scraping teeth with adjustable space is arranged on one side of the first scraping tooth, a pair of connecting seats is fixed at the end of the handle, and the connecting seats are connected with the connecting rod. The end of the connecting rod is rotationally arranged between the pair of connecting seats, a clamping gear is fixed to the outer side of the rotating shaft, a clamping assembly matched with the clamping gear is arranged at the end of the handle, and an adjusting assembly is arranged at the end of the connecting rod and used for adjusting the distance between the pair of second scraping teeth. The hollow scraping tooth is easy and convenient to operate, the operation angle of the scraping tooth is adjusted by adjusting the angle between the connecting rod and the handle, a user can flexibly adjust the operation angle according to actual requirements, meanwhile, a pair of second scraping teeth with the adjustable distance can be arranged on the outer side of the first scraping tooth, and the overall blade width of the scraping tooth can be adjusted; therefore, the treated intervertebral space is increased.

Description

Technical Field

[0001] This utility model relates to the field of medical scraping teeth, specifically a type of steerable hollow scraping tooth. Background Technology

[0002] In some spinal endoscopic surgeries, it is necessary to remove part of the bone to create a relatively spacious and free working channel for the operation. Especially in the most common lumbar disc herniation nucleus pulposus removal via the intervertebral foramen approach, intervertebral foramen widening and shaping is often required. Simply put, this involves removing or grinding away part of the superior articular process using a stepped trephine saw, bone file, or endoscopic drill to remove obstructions or obstacles to changing the angle of the endoscope, thereby enabling more complex surgical procedures to be completed.

[0003] In general, during surgery, the upper articular process is removed by a series of ring saws. For wounds that have already undergone an initial ring sawing, the removal efficiency of a secondary ring saw is relatively lower than that of a full wound cut, which prolongs the operation time and the operating time for medical staff. Because of the small size of the scraper teeth, using them can be very effective in this situation. However, the commonly used scraper tooth structure makes it inconvenient to adjust the blade width according to the needs of use, and it is also difficult to change the angle of the scraper teeth when encountering blind spots that are difficult to reach. Therefore, there is an urgent need to design a steerable hollow scraper tooth to solve the above problems. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this utility model provides a steerable hollow scraper tooth. By adjusting the angle between the connecting rod and the handle, the operating angle of the scraper tooth can be adjusted. Users can flexibly adjust it according to actual needs. At the same time, a pair of adjustable-gap second scraper teeth can be provided on the outside of the first scraper tooth, so that the overall blade width of the scraper tooth can be adjusted, thereby increasing the processing intervertebral space.

[0005] This utility model provides a steerable hollow scraper, including a handle. A connecting rod is rotatably mounted at the end of the handle, and a first scraper is fixed to the end of the connecting rod. A pair of second scraper teeth, with adjustable spacing and conforming to the side of the first scraper tooth, are provided on one side of the first scraper tooth. By adjusting the angle between the connecting rod and the handle, the operating angle of the scraper tooth can be adjusted, allowing the user to flexibly adjust it according to actual needs. Furthermore, by providing a pair of adjustable-spacing second scraper teeth outside the first scraper tooth, the overall blade width of the scraper tooth can be adjusted, thereby increasing the processing intervertebral space.

[0006] As a further technical solution, a pair of connecting seats are fixed to the end of the handle, and the end of the connecting rod is rotatably disposed between the pair of connecting seats via a rotating shaft. A locking gear is fixed to the outside of the rotating shaft, and a locking component that cooperates with the locking gear is provided at the end of the handle. By adjusting the angle of the connecting rod, the operating angle of the scraping teeth can be adjusted. Then, by the locking component and the locking gear engaging with each other, the connecting rod can be kept at this angle, making it convenient for the user to operate.

[0007] As a further technical solution, the locking assembly includes a pair of limiting grooves formed at the end of the handle. A limiting rod is fixed to the inner wall of the limiting groove, and a connecting plate is sleeved on the outer side of the limiting rod. A locking rod extending between a pair of connecting seats is fixed on the connecting plate. A limiting block is also fixed to the end of the limiting rod, and a return spring is sleeved on the outer side of the limiting rod, located between the limiting block and the inner wall of the limiting groove. After the connecting rod is moved to a certain angle, the connecting plate is pushed, causing the locking rod to move and engage in the gap between adjacent teeth of the locking gear, thereby maintaining the locking gear at a certain angle. During the process of pushing the connecting plate, the return spring is compressed, allowing the connecting plate to self-reset.

[0008] As a further technical solution, a sliding ring is threaded onto the outer side of the handle end, and the sliding ring abuts against the same side of a pair of connecting plates. Rotating the sliding ring causes it to simultaneously push the connecting plates to the left until the locking rod engages in the gap between adjacent teeth of the locking gear. Conversely, when the sliding ring moves to the right, the return spring can also drive the connecting plates to return to their original position, causing the locking rod to disengage from the locking gear, thus completing the entire adjustment process. The operation is simple and convenient.

[0009] As a further technical solution, the connecting rod consists of two detachably connected rod sections. A threaded connector is fixed to the end of the left rod section, and a threaded groove is provided at the end of the right rod section for threaded connection with the threaded connector. The scraper head can be replaced by unscrewing the left rod section from the end of the right rod section.

[0010] As a further technical solution, the first scraper tooth is T-shaped, and the end of the connecting rod is provided with an adjustment component for adjusting the spacing between a pair of second scraper teeth. The inner surfaces of the two second scraper teeth are fixed to the first scraper tooth via a telescopic rod. Adjusting the spacing between the pair of second scraper teeth via the adjustment component and the telescopic rod enhances stability during adjustment. When the pair of second scraper teeth move in opposite directions, the adjustment of the blade width can increase the intervertebral space being processed, allowing for flexible adjustment according to the actual usage scenario.

[0011] As a further technical solution, the adjustment assembly includes a pair of positioning grooves at the end of the connecting rod. A positioning rod extending to the inner side of the second scraper tooth is movably disposed within the positioning grooves. A moving block is fixed to the positioning rod, and a first U-shaped connecting seat is fixed to the end of the positioning rod. A connecting rod is hinged to the first U-shaped connecting seat, and a second U-shaped connecting seat fixed to the inner side of the second scraper tooth is hinged to the other end of the connecting rod. A positioning spring is sleeved on the outer side of the positioning rod, located between the moving block and the inner wall of the positioning groove. Pushing the moving block to the left causes the positioning rod to move to the left as well, compressing the positioning spring and causing the connecting rod to swing. This causes the end of the connecting rod to push the second scraper tooth away from the first scraper tooth. Conversely, when the moving block moves to the right, under the tension of the positioning spring, the positioning rod moves to the right as well, causing the connecting rod to swing. This causes the end of the connecting rod to pull the second scraper tooth closer to the first scraper tooth, thereby adjusting the spacing between the pair of second scraper teeth and allowing for flexible adjustment of the overall blade width of the scraper teeth.

[0012] As a further technical solution, a movable ring is threaded onto the outer side of the connecting rod end, and the movable ring abuts against the same side of a pair of movable blocks. Rotating the movable ring causes it to simultaneously push the pair of movable blocks to the left. Under the action of the first U-shaped connecting seat, the connecting rod, and the second U-shaped connecting seat, the pair of second scraping teeth move in opposite directions, and the overall cutting width of the scraping teeth increases. Conversely, the movable ring moves to the right, and under the action of the positioning spring, the positioning rod moves to the right simultaneously. Under the action of the first U-shaped connecting seat, the connecting rod, and the second U-shaped connecting seat, the pair of second scraping teeth move relative to each other, and the overall cutting width of the scraping teeth decreases.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This hollow scraper is simple and convenient to operate. By adjusting the angle of the connecting rod and the handle, the operating angle of the scraper can be adjusted. Users can flexibly adjust it according to actual needs. At the same time, a pair of adjustable-spaced second scrapers can be set on the outside of the first scraper to adjust the overall blade width of the scraper, thereby increasing the processing intervertebral space.

[0015] 2. This hollow scraper tooth maintains the connecting rod at a certain angle by moving the connecting rod to a certain angle and then moving the locking rod to engage with the gap between the adjacent teeth of the locking gear, making the operation more stable.

[0016] 3. This hollow scraper tooth moves the positioning rod by rotating the moving ring. Under the action of the first U-shaped connecting seat, the connecting rod and the second U-shaped connecting seat, a pair of second scraper teeth can move relative to each other, and the overall blade width of the scraper tooth becomes smaller. The pair of second scraper teeth can also move in opposite directions, and the overall blade width of the scraper tooth becomes larger. The overall blade width of the scraper tooth can be flexibly adjusted by adjusting the distance between the pair of second scraper teeth. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a steering hollow scraper tooth provided for an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the structure of a snap-fit ​​assembly in a hollow steering tooth provided for an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the structure of an adjusting component in a hollow steering scraper provided for an embodiment of the present utility model.

[0021] Figure 4 This is a schematic diagram of a two-part rod connection structure for a steering hollow scraper tooth provided in an embodiment of the present utility model.

[0022] Figure 5 This is a front view of the structure of a hollow steering scraper provided in an embodiment of the present utility model.

[0023] In the diagram: 1. Handle; 2. Connecting rod; 21. Rod section; 22. Threaded connector; 23. Threaded groove; 3. First scraper tooth; 4. Second scraper tooth; 5. Mounting base; 6. Rotating shaft; 7. Snap-fit ​​gear; 8. Snap-fit ​​assembly; 81. Limiting groove; 82. Limiting rod; 83. Connecting plate; 84. Locking rod; 85. Limiting block; 86. Return spring; 87. Sliding ring; 9. Adjusting assembly; 91. Positioning groove; 92. Positioning rod; 93. Moving block; 94. First U-shaped connecting seat; 95. Connecting rod; 96. Second U-shaped connecting seat; 97. Positioning spring; 98. Moving ring; 10. Telescopic rod. Detailed Implementation

[0024] The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In addition, the technical features of the various embodiments or individual embodiments provided by this utility model can be arbitrarily combined to form new technical solutions. Such combinations are not bound by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] Please see Figure 1-5 This utility model provides a steering hollow scraper tooth, including a handle 1, a connecting rod 2 rotatably provided at the end of the handle 1, a first scraper tooth 3 fixed at the end of the connecting rod 2, and a pair of second scraper teeth 4 provided on one side of the first scraper tooth 3 that fits against the side of the first scraper tooth 3 and whose spacing is adjustable.

[0027] By adjusting the angle between the connecting rod 2 and the handle 1, the operating angle of the scraping teeth can be adjusted. Users can flexibly adjust it according to actual needs. Furthermore, by setting a pair of adjustable-spacing second scraping teeth 4 on the outside of the first scraping tooth 3, the overall blade width of the scraping teeth can be adjusted, thereby increasing the intervertebral space to be processed.

[0028] In this embodiment, as Figure 1 As shown, a pair of mounting seats 5 are fixed to the end of the handle 1, and the end of the connecting rod 2 is rotatably disposed between the pair of mounting seats 5 via a rotating shaft 6. A locking gear 7 is fixed to the outside of the rotating shaft 6, and a locking component 8 that cooperates with the locking gear 7 is provided at the end of the handle 1.

[0029] By adjusting the angle of the connecting rod 2, the operating angle of the scraping teeth can be adjusted. Then, by engaging the locking component 8 with the locking gear 7, the connecting rod 2 can be kept at this angle, making it convenient for the user to operate.

[0030] As a specific structure of a snap-fit ​​component 8, such as Figure 2 As shown, the snap-fit ​​assembly 8 includes a pair of limiting grooves 81 opened at the end of the handle 1. A limiting rod 82 is fixed to the inner wall of the limiting groove 81. A connecting plate 83 is sleeved on the outer side of the limiting rod 82. A snap-fit ​​rod 84 extending between a pair of mounting seats 5 is fixed on the connecting plate 83. A limiting block 85 is also fixed to the end of the limiting rod 82. A return spring 86 located between the limiting block 85 and the inner wall of the limiting groove 81 is sleeved on the outer side of the limiting rod 82.

[0031] After the connecting rod 2 is moved to a certain angle, the connecting plate 83 is pushed, causing the locking rod 84 to move and engage in the gap between the adjacent teeth of the locking gear 7, thereby keeping the locking gear 7 at a certain angle. During the process of pushing the connecting plate 83, the return spring 86 will be squeezed, so that the connecting plate 83 can be reset by itself.

[0032] Furthermore, to improve operational convenience, the connecting plate 83 can be moved simultaneously. A sliding ring 87 is threadedly connected to the outer side of the handle 1. The sliding ring 87 abuts against the same side of the pair of connecting plates 83. Rotating the sliding ring 87 causes the connecting plate 83 to move to the left simultaneously until the locking rod 84 engages in the gap between the adjacent teeth of the locking gear 7. Conversely, when the sliding ring 87 moves to the right, the return spring 86 can also drive the connecting plate 83 to reset, causing the locking rod 84 to disengage from the locking gear 7, thus completing the entire adjustment process. The operation is simple and convenient.

[0033] The outer side of the sliding ring 87 is also provided with an anti-slip sleeve, which can improve the stability when rotating the sliding ring 87 and prevent slippage.

[0034] Furthermore, the scraper head can be replaced, allowing users to easily switch to different models of scraper heads, such as... Figure 1 , Figure 5 As shown, the connecting rod 2 is detachably connected by two rods 21. The end of the left rod 21 is fixed with a threaded connector 22, and the end of the right rod 21 has a threaded groove 23 that is threaded to the threaded connector 22. The scraper head can be replaced by unscrewing the left rod 21 from the end of the right rod 21.

[0035] Furthermore, the first scraper tooth 3 is T-shaped, and the inner sides of the two second scraper teeth 4 are fixed to the first scraper tooth 3 by the telescopic rod 10. The end of the connecting rod 2 is provided with an adjustment component 9 for adjusting the spacing between the pair of second scraper teeth 4.

[0036] The spacing between the pair of second scraping teeth 4 is adjusted by adjusting component 9, and the telescopic rod 10 makes the pair of second scraping teeth 4 more stable when adjusted. When the pair of second scraping teeth 4 move in opposite directions, the adjustment of the blade width of the scraping teeth can increase the intervertebral space to be processed, and can be flexibly adjusted according to the actual use scenario.

[0037] As a specific structure of adjustment component 9, such as Figure 3As shown, the adjustment assembly 9 includes a pair of positioning grooves 91 opened at the end of the connecting rod 2. A positioning rod 92 extending to the inner side of the second scraper tooth 4 is movably installed in the positioning groove 91. A moving block 93 is fixed on the positioning rod 92. A first U-shaped connecting seat 94 is fixed at the end of the positioning rod 92. A connecting rod 95 is hinged to the first U-shaped connecting seat 94. A second U-shaped connecting seat 96 fixed to the inner side of the second scraper tooth 4 is hinged to the other end of the connecting rod 95. A positioning spring 97 is sleeved on the outer side of the positioning rod 92 between the moving block 93 and the inner wall of the positioning groove 91.

[0038] Pushing the moving block 93 to the left causes the positioning rod 92 to move to the left as well, compressing the positioning spring 97. The connecting rod 95 swings, causing the end of the connecting rod 95 to push the second scraper tooth 4 away from the first scraper tooth 3. Conversely, when the moving block 93 moves to the right, the positioning rod 92 moves to the right under the tension of the positioning spring 97. The connecting rod 95 swings, causing the end of the connecting rod 95 to pull the second scraper tooth 4 closer to the first scraper tooth 3, thereby adjusting the spacing between the pair of second scraper teeth 4, allowing the overall blade width of the scraper teeth to be flexibly adjusted.

[0039] Furthermore, to improve the ease of operation and simultaneously move the connecting plate 83, a moving ring 98 is threadedly connected to the outer side of the end of the connecting rod 2, and the moving ring 98 abuts against the same side of a pair of moving blocks 93.

[0040] Rotating the moving ring 98 causes it to simultaneously push a pair of moving blocks 93 to the left. Under the action of the first U-shaped connecting seat 94, the connecting rod 95, and the second U-shaped connecting seat 96, a pair of second scraping teeth 4 move in opposite directions, and the overall cutting width of the scraping teeth increases. Conversely, the moving ring 98 moves to the right, and under the action of the positioning spring 97, the positioning rod 92 moves to the right at the same time. Under the action of the first U-shaped connecting seat 94, the connecting rod 95, and the second U-shaped connecting seat 96, a pair of second scraping teeth 4 move relative to each other, and the overall cutting width of the scraping teeth decreases.

[0041] In summary, when using this utility model, after the connecting rod 2 is moved to a certain angle, the sliding ring 87 is rotated, so that the sliding ring 87 simultaneously pushes the connecting plate 83 to move to the left until the locking rod 84 is engaged in the gap between the adjacent teeth of the locking gear 7, thereby keeping the locking gear 7 at a certain angle, making the scraping teeth more stable during use.

[0042] Rotating the moving ring 98 causes it to simultaneously push a pair of moving blocks 93 to the left. Under the action of the first U-shaped connecting seat 94, the connecting rod 95, and the second U-shaped connecting seat 96, a pair of second scraping teeth 4 move in opposite directions, increasing the overall blade width of the scraping teeth. Conversely, the moving ring 98 moves to the right, and under the action of the positioning spring 97, the positioning rod 92 moves to the right simultaneously. Under the action of the first U-shaped connecting seat 94, the connecting rod 95, and the second U-shaped connecting seat 96, a pair of second scraping teeth 4 move relative to each other, decreasing the overall blade width of the scraping teeth. By adjusting the spacing between the pair of second scraping teeth 4, the overall blade width of the scraping teeth can be flexibly adjusted.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A type of hollow steering scraper tooth, characterized in that, Includes a handle (1), the end of the handle (1) is rotatably provided with a connecting rod (2), the end of the connecting rod (2) is fixed with a first scraper tooth (3), and one side of the first scraper tooth (3) is provided with a pair of second scraper teeth (4) that fit against the side of the first scraper tooth (3) and have an adjustable spacing.

2. The steering hollow scraper tooth according to claim 1, characterized in that, The handle (1) has a pair of mounting seats (5) fixed at its end. The end of the connecting rod (2) is rotatably disposed between the pair of mounting seats (5) via a rotating shaft (6). A snap-fit ​​gear (7) is fixed on the outside of the rotating shaft (6). The handle (1) has a snap-fit ​​assembly (8) that cooperates with the snap-fit ​​gear (7) at its end.

3. The steering hollow scraper tooth according to claim 2, characterized in that, The snap-fit ​​assembly (8) includes a pair of limiting grooves (81) opened at the end of the handle (1). A limiting rod (82) is fixed to the inner wall of the limiting groove (81). A connecting plate (83) is sleeved on the outer side of the limiting rod (82). A locking rod (84) extending between a pair of mounting seats (5) is fixed on the connecting plate (83). A limiting block (85) is also fixed to the end of the limiting rod (82). A return spring (86) located between the limiting block (85) and the inner wall of the limiting groove (81) is sleeved on the outer side of the limiting rod (82).

4. The steering hollow scraper tooth according to claim 3, characterized in that, The outer side of the end of the handle (1) is threaded with a sliding ring (87), which abuts against the same side of a pair of connecting plates (83).

5. The steering hollow scraper tooth according to claim 1, characterized in that, The connecting rod (2) is detachably connected by two rods (21). The end of the left rod (21) is fixed with a threaded connector (22), and the end of the right rod (21) is provided with a threaded groove (23) that is threadedly connected to the threaded connector (22).

6. The steering hollow scraper tooth according to claim 1, characterized in that, The first scraper tooth (3) is T-shaped, and the end of the connecting rod (2) is provided with an adjustment component (9) for adjusting the spacing of a pair of second scraper teeth (4). The inner sides of the two second scraper teeth (4) are fixed to the first scraper tooth (3) by a telescopic rod (10).

7. A hollow steering scraper tooth according to claim 6, characterized in that, The adjustment assembly (9) includes a pair of positioning grooves (91) opened at the end of the connecting rod (2). A positioning rod (92) extending to the inner side of the second scraper tooth (4) is movable in the positioning groove (91). A moving block (93) is fixed on the positioning rod (92). A first U-shaped connecting seat (94) is fixed at the end of the positioning rod (92). A connecting rod (95) is hinged on the first U-shaped connecting seat (94). A second U-shaped connecting seat (96) fixed to the inner side of the second scraper tooth (4) is hinged at the other end of the connecting rod (95). A positioning spring (97) is sleeved on the outer side of the positioning rod (92) between the moving block (93) and the inner wall of the positioning groove (91).

8. The steering hollow scraper tooth according to claim 7, characterized in that, The outer side of the end of the connecting rod (2) is threaded with a movable ring (98), which abuts against the same side of a pair of movable blocks (93).

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