Special drill bit for orthopedic surgery

Abstract

The utility model discloses a special drill bit for orthopedic surgery, which comprises a drill bit body, the drill bit body is provided with a connecting rod, and the connecting rod is provided with a clamping block; the outer wall of the connecting rod is sleeved with a positioning sleeve, a limiting sleeve is arranged on the positioning sleeve, a driving assembly is arranged on the outer wall of the limiting sleeve, a plurality of sets of elastic limiting plates are arranged on the limiting sleeve, and the driving assembly moves in the direction of the elastic limiting plates. The elastic limiting plate shrinks towards the axis direction of the limiting sleeve and wraps the outer wall of the connecting rod for limiting; the drill bit has the advantages that the positioning sleeve slides and is adjusted in the axial direction of the outer wall of the connecting rod, the preset distance is formed between the end, away from the limiting sleeve, of the positioning sleeve and the drill bit tip of the drill bit body, the drilling depth is effectively limited, and the technical bottleneck that a traditional drill bit cannot accurately control the depth is broken through; the size precision of bone hole machining in the orthopedic surgery is remarkably improved, and nerve and blood vessel injuries caused by over-drilling are avoided.

Description

Technical Field

[0001] This utility model relates to a special drill bit for orthopedic surgery. Background Technology

[0002] Bone drilling is a common procedure in orthopedic surgery, used for fracture fixation, bone screw implantation, or bone tissue sampling. Traditional orthopedic drills typically consist of a drill body and a clamping structure, relying on the operator's experience to manually control the drilling depth. However, traditional drills lack depth limiting structures, and the drilling depth depends on the surgeon's subjective judgment. This can easily lead to over-drilling (damaging deep nerves and blood vessels) or insufficient drilling (affecting implant stability) due to operational errors, increasing surgical risks. Therefore, this invention proposes a specialized drill for orthopedic surgery to address the aforementioned problems. Utility Model Content

[0003] The purpose of this invention is to provide a special drill bit for orthopedic surgery to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A special drill bit for orthopedic surgery includes a drill bit body, the drill bit body being provided with a connecting rod, and a clamping block being provided on the connecting rod;

[0006] The outer wall of the connecting rod is fitted with a positioning sleeve, the positioning sleeve is provided with a limiting sleeve, the outer wall of the limiting sleeve is provided with a driving component, and the limiting sleeve is provided with multiple sets of elastic limiting plates. The driving component moves toward the elastic limiting plates, so that the elastic limiting plates contract toward the axis of the limiting sleeve and wrap around the outer wall of the connecting rod for limiting.

[0007] As an improvement to the above technical solution, the inner wall of the positioning sleeve is provided with an annular groove, and the outer wall of the limiting sleeve is provided with an annular protrusion. The annular protrusion is disposed in the annular groove, so that the positioning sleeve and the limiting sleeve are rotatably connected.

[0008] As an improvement to the above technical solution, the driving assembly includes a driving nut, which is sleeved on the outer wall of the limiting sleeve. A driving sleeve is provided on the driving nut, and the driving sleeve is slidably sleeved on the outer wall of the limiting sleeve.

[0009] As an improvement to the above technical solution, the outer wall of the limiting sleeve is provided with an external thread wall, and the driving nut is threadedly sleeved on the external thread wall.

[0010] As an improvement to the above technical solution, multiple sets of the elastic limiting plates are arranged in a ring array on the limiting sleeve, and the wall thickness of the elastic limiting plates gradually increases from the limiting sleeve to the clamping block.

[0011] The elastic limiting plate is also provided with a slope, and the driving sleeve contacts the slope, causing the elastic limiting plate to deform and contract toward the axis of the limiting sleeve.

[0012] As an improvement to the above technical solution, two sets of protective ring plates are symmetrically arranged on the outer wall of the positioning sleeve, and the two sets of protective ring plates are fixedly connected to the positioning sleeve.

[0013] As an improvement to the above technical solution, a deformation groove is provided between every two sets of elastic limiting plates.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By adjusting the axial sliding of the positioning sleeve along the outer wall of the connecting rod, a preset distance is formed between the end of the positioning sleeve away from the limiting sleeve and the tip of the drill bit body, effectively limiting the drilling depth. This structure breaks through the technical bottleneck of traditional drill bits being unable to accurately control the depth, significantly improving the dimensional accuracy of bone hole processing in orthopedic surgery, avoiding nerve and blood vessel damage caused by over-drilling. Moreover, combined with the elastic limiting plate radially contracting and deforming under the action of the drive component to form a self-locking limiting mechanism, it ensures that the positioning sleeve can be stably locked in any adjustment position, thereby effectively ensuring the drilling depth. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the positioning sleeve of this utility model;

[0018] Figure 3 This utility model Figure 2 Side view;

[0019] Figure 4 This utility model Figure 3 Sectional view of AA;

[0020] Figure 5 This is a cross-sectional structural diagram of the limiting sleeve of this utility model;

[0021] Figure 6 This is a cross-sectional structural diagram of the positioning sleeve of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the limiting sleeve of this utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the drive component of this utility model.

[0024] In the diagram: 10. Drill bit body; 11. Connecting rod; 12. Clamping block; 20. Positioning sleeve; 21. Protective ring plate; 22. Annular groove; 30. Drive assembly; 31. Drive nut; 32. Drive sleeve; 40. Elastic limiting plate; 41. Slope; 42. Deformation groove; 50. Limiting sleeve; 51. Annular protrusion; 52. External threaded wall. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] like Figure 1-8 As shown, this embodiment proposes a special drill bit for orthopedic surgery, including a drill bit body 10, the drill bit body 10 is provided with a connecting rod 11, and a clamping block 12 is provided on the connecting rod 11;

[0028] The outer wall of the connecting rod 11 is fitted with a positioning sleeve 20, and a limiting sleeve 50 is provided on the positioning sleeve 20. The outer wall of the limiting sleeve 50 is provided with a driving assembly 30, and multiple sets of elastic limiting plates 40 are provided on the limiting sleeve 50. The driving assembly 30 moves toward the elastic limiting plate 40, so that the elastic limiting plate 40 contracts toward the axis of the limiting sleeve 50 and wraps around the outer wall of the connecting rod 11 for limiting.

[0029] In this embodiment, when the drill bit body 10 is in use, the clamping block 12 is placed in the drill bit chuck of the drilling machine, and the drill bit body 10 is fixed on the drilling machine by the drill bit chuck. Then, the positioning sleeve 20 is manually moved to slide on the outer wall of the connecting rod 11 until the distance between the end of the positioning sleeve 20 away from the limiting sleeve 50 and the drill tip of the drill bit body 10 reaches the specified drilling depth. Then, through the cooperation of the drive component 30 and multiple sets of elastic limiting plates 40, the elastic limiting plates 40 are contracted towards the axis of the limiting sleeve 50 and wrapped around the outer wall of the connecting rod 11 for limiting. This can limit the positioning sleeve 20, so that the distance between the end of the positioning sleeve 20 away from the limiting sleeve 50 and the drill tip of the drill bit body 10 is fixed.

[0030] By adjusting the axial sliding of the positioning sleeve 20 along the outer wall of the connecting rod 11, a preset distance is formed between the end of the positioning sleeve 20 away from the limiting sleeve 50 and the tip of the drill bit body 10, effectively limiting the drilling depth. This structure breaks through the technical bottleneck of traditional drill bits being unable to accurately control the depth, significantly improving the dimensional accuracy of bone hole processing in orthopedic surgery, avoiding nerve and blood vessel damage caused by over-drilling. Moreover, combined with the elastic limiting plate 40, which forms a self-locking limiting mechanism under the action of the driving component 30, the positioning sleeve 20 can be stably locked in any adjustment position, thereby effectively ensuring the drilling depth.

[0031] Specifically, the inner wall of the positioning sleeve 20 is provided with an annular groove 22, and the outer wall of the limiting sleeve 50 is provided with an annular protrusion 51. The annular protrusion 51 is disposed in the annular groove 22, so that the positioning sleeve 20 and the limiting sleeve 50 are rotatably connected.

[0032] In this embodiment, the cooperation between the annular groove 22 and the annular protrusion 51 enables the limiting sleeve 50 and the positioning sleeve 20 to be rotatably connected. When the limiting sleeve 50 rotates with the connecting rod 11, the operator can manually hold the positioning sleeve 20 to improve the stability of the drill bit body 10 and thus improve the drilling quality.

[0033] Specifically, the drive assembly 30 includes a drive nut 31, which is sleeved on the outer wall of the limiting sleeve 50. A drive sleeve 32 is provided on the drive nut 31, and the drive sleeve 32 is slidably sleeved on the outer wall of the limiting sleeve 50.

[0034] Specifically, the outer wall of the limiting sleeve 50 is provided with an external threaded wall 52, and the driving nut 31 is threadedly sleeved on the external threaded wall 52.

[0035] In this embodiment, when the elastic limiting plate 40 is contracted, the drive nut 31 is rotated, and the drive sleeve 32 is displaced toward the elastic limiting plate 40 under the threaded engagement of the drive nut 31 and the external threaded wall 52, so that the elastic limiting plate 40 contracts toward the axial direction of the limiting sleeve 50.

[0036] Specifically, multiple sets of the elastic limiting plates 40 are arranged in a ring array on the limiting sleeve 50, and the wall thickness of the elastic limiting plates 40 gradually increases from the limiting sleeve 50 to the clamping block 12.

[0037] The elastic limiting plate 40 is also provided with a slope 41, and the driving sleeve 32 contacts the slope 41, so that the elastic limiting plate 40 deforms and contracts toward the axis of the limiting sleeve 50.

[0038] In this embodiment, when the drive sleeve 32 moves toward the elastic limiting plate 40, the drive sleeve 32 contacts the slope 41. Since the wall thickness of the elastic limiting plate 40 gradually increases from the limiting sleeve 50 to the clamping block 12, the elastic limiting plate 40 can shrink toward the axis of the limiting sleeve 50.

[0039] Specifically, the outer wall of the positioning sleeve 20 is symmetrically provided with two sets of protective ring plates 21, and the two sets of protective ring plates 21 are fixedly connected to the positioning sleeve 20.

[0040] In this embodiment, the fixed connection structure between the protective ring plate 21 and the positioning sleeve 20 can effectively enhance the anti-slip properties and force stability when the operator holds the device.

[0041] Specifically, a deformation groove 42 is provided between every two sets of elastic limiting plates 40.

[0042] In this embodiment, the deformation groove 42 facilitates the deformation of the elastic limiting plate 40 toward the axial direction of the limiting sleeve 50.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special drill bit for orthopedic surgery, characterized in that: Includes a drill bit body (10), the drill bit body (10) is provided with a connecting rod (11), and a clamping block (12) is provided on the connecting rod (11); The outer wall of the connecting rod (11) is fitted with a positioning sleeve (20), and a limiting sleeve (50) is provided on the positioning sleeve (20). The outer wall of the limiting sleeve (50) is provided with a setting drive assembly (30), and the limiting sleeve (50) is provided with multiple sets of elastic limiting plates (40). The drive assembly (30) moves toward the elastic limiting plate (40), so that the elastic limiting plate (40) contracts and wraps around the outer wall of the connecting rod (11) in the direction of the axis of the limiting sleeve (50) for limiting.

2. The special drill bit for orthopedic surgery according to claim 1, characterized in that: The inner wall of the positioning sleeve (20) is provided with an annular groove (22), and the outer wall of the limiting sleeve (50) is provided with an annular protrusion (51). The annular protrusion (51) is disposed in the annular groove (22), so that the positioning sleeve (20) and the limiting sleeve (50) are rotatably connected.

3. The special drill bit for orthopedic surgery according to claim 1, characterized in that: The drive assembly (30) includes a drive nut (31), which is sleeved on the outer wall of the limiting sleeve (50). A drive sleeve (32) is provided on the drive nut (31), and the drive sleeve (32) is slidably sleeved on the outer wall of the limiting sleeve (50).

4. The special drill bit for orthopedic surgery according to claim 3, characterized in that: The outer wall of the limiting sleeve (50) is provided with an external threaded wall (52), and the drive nut (31) is threaded onto the external threaded wall (52).

5. A special drill bit for orthopedic surgery according to claim 3, characterized in that: Multiple sets of the elastic limiting plates (40) are arranged in a ring array on the limiting sleeve (50), and the wall thickness of the elastic limiting plates (40) gradually increases from the limiting sleeve (50) to the clamping block (12); The elastic limiting plate (40) is also provided with a slope (41), and the driving sleeve (32) contacts the slope (41), so that the elastic limiting plate (40) deforms and contracts in the direction of the axis of the limiting sleeve (50).

6. The special drill bit for orthopedic surgery according to claim 1, characterized in that: The outer wall of the positioning sleeve (20) is symmetrically provided with two sets of protective ring plates (21), and the two sets of protective ring plates (21) are fixedly connected to the positioning sleeve (20).

7. A special drill bit for orthopedic surgery according to claim 1, characterized in that: A deformation groove (42) is provided between each pair of elastic limiting plates (40).

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