Sectional type extension rod structure of orthopedic drill bit

Abstract

The utility model discloses an orthopaedic drill bit sectional type extension rod structure which comprises a connecting rod assembly installed at the tail of a drill bit part, and an extension handle assembly is installed in the connecting rod assembly. The interior of the connecting rod assembly is hollow, a fastening connector is arranged at the top of the connecting rod assembly, the bottom of the extension handle assembly is inserted into the connecting rod assembly, and the extension handle assembly is in threaded connection with the connecting rod assembly; according to the utility model, the working length of a drill bit is allowed to be accurately adjusted in millimeter level during operation through a sliding fit thread locking mechanism of the extension handle assembly in the connecting rod, and the extension rod is ensured not to move accidentally during high-speed rotation by combining double adsorption of the magnetic seat and the magnetic head with mechanical fastening occlusion; the threaded connector and a standard connector at the tail of the drill bit support rapid instrument replacement, and a forced alignment structure of a positioning groove of the extension rod and a positioning block in the locking cap ensures that a thread starting point is automatically aligned during assembly.

Description

Technical Field

[0001] This utility model specifically relates to a segmented extension rod structure for orthopedic drill bits. Background Technology

[0002] Orthopedic drills are core tools used for cutting and drilling bone tissue in orthopedic surgery. Traditional orthopedic drills are usually one-piece rod structures, and their length cannot be adjusted during surgery. Therefore, a large number of instruments of various sizes are usually prepared, which undoubtedly increases the complexity and cost of surgical preparation. In deep surgery, the overall rigidity of the long rod decreases, which can easily lead to drill deviation. The short rod cannot reach deep tissues. When drilling at multiple angles in complex anatomical locations, the fixed design requires frequent changes of approach, which prolongs the operation time.

[0003] Therefore, it is necessary to invent a segmented extension rod structure for orthopedic drill bits to solve the above problems. Utility Model Content

[0004] (a) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a segmented extension rod structure for orthopedic drill bits, which can change the length of the drill bit handle according to actual conditions, making it more practical.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a segmented extension rod structure for orthopedic drill bits, including a connecting rod assembly installed at the tail of the drill bit, an extension shank assembly installed inside the connecting rod assembly, and the extension shank assembly moving within the connecting rod assembly;

[0008] The bottom of the connecting rod assembly is threadedly connected to the tail end of the drill head;

[0009] The connecting rod assembly is hollow inside, with a fastening connector at the top. The extension handle assembly is inserted into the connecting rod assembly at the bottom, and a locking cap is provided on its outside to cooperate with the fastening connector to fix the moving length of the extension handle assembly. The extension handle assembly and the connecting rod assembly are threaded together.

[0010] Preferably, the connecting rod assembly has a threaded connector extending from its bottom, and the drill bit has a matching threaded groove at its tail. The connecting rod assembly also includes a connecting rod, and the fastening connector is located at its top. The fastening connector has a moving hole in its middle that connects to the inside of the connecting rod. The inner wall of the moving hole is threaded, and the outer wall of the fastening connector has multiple evenly spaced fastening grooves that cooperate with the locking cap. The bottom of the outer side of the fastening connector is also provided with a magnetic seat, and the moving hole has the same size as the bottom of the extension handle assembly.

[0011] Preferably, the extension handle assembly includes an extension rod with an extension handle vertically fixed to its top. The locking cap is installed on the outside of the extension rod. The outer wall of the extension rod has four evenly spaced positioning grooves. The outer wall of the extension rod also has threads that avoid the positioning grooves. The locking cap has a through hole in the middle that matches the extension rod. The inner wall of the through hole has a positioning block that matches the positioning grooves. The bottom inner side of the locking cap has a fastening strip that matches the fastening groove. The bottom of the locking cap also has a magnetic head that matches the magnetic base. The size of the locking cap matches the fastening connector, and the overall cross-sectional size does not exceed the cross-sectional size of the connecting rod.

[0012] Preferably, the extension rod has a limiting ring at its bottom, which is placed inside the connecting rod and restricts the extension rod from moving to the outside of the connecting rod. The positioning groove is vertically arranged on the outer wall of the extension rod, and its length is consistent with the thread height of the outer wall of the extension rod. The thread of the outer wall of the extension rod matches the thread of the inner wall of the moving hole.

[0013] Preferably, the outer wall of the locking cap is also provided with multiple anti-slip grooves, which are arranged vertically and evenly.

[0014] Preferably, the overall length of the extension rod should at least exceed the internal depth of the connecting rod.

[0015] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0016] 1. This utility model allows for millimeter-level precise adjustment of the drill bit's working length during surgery through a sliding engagement and threaded locking mechanism within the connecting rod of the extension rod assembly. The dual adsorption of the magnetic seat and the magnetic head, combined with mechanical fastening, ensures that the extension rod will not accidentally shift during high-speed rotation, thus avoiding the risk of perforation caused by instrument slippage during surgery.

[0017] 2. The standardized interface between the threaded connector and the drill bit tail of this utility model allows for quick instrument replacement, which is much more efficient than the traditional snap-fit ​​connection. The positioning groove of the extension rod and the forced alignment structure of the positioning block inside the locking cap ensure that the thread start point is automatically aligned during assembly, avoiding instrument damage caused by mis-threading. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0021] Figure 3 For the present utility model Figure 2 Schematic diagram of part A in the middle;

[0022] Figure 4 This is a schematic diagram showing the disassembled structure of the fastening connector, locking cap, and extension rod of this utility model;

[0023] Figure 5 This is a schematic diagram of the fastening connector and locking cap connection structure of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Drill bit; 11. Threaded connection groove; 2. Connecting rod assembly; 21. Fastening connector; 22. Threaded connector; 23. Connecting rod; 24. Moving hole; 25. Fastening groove; 26. Magnetic base; 3. Extension shank assembly; 31. Locking cap; 32. Extension rod; 33. Extension shank; 34. Positioning groove; 35. Through hole; 36. Positioning block; 37. Fastening strip; 38. Magnetic head; 39. Limiting ring; 310. Anti-slip groove. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figure 1-5 The orthopedic drill bit segmented extension rod structure shown includes a connecting rod assembly 2 installed at the tail of the drill head 1, an extension shank assembly 3 installed inside the connecting rod assembly 2, and the extension shank assembly 3 moving within the connecting rod assembly 2;

[0028] Specifically, the bottom of the connecting rod assembly 2 is threadedly connected to the tail of the drill head 1;

[0029] Specifically, the connecting rod assembly 2 is hollow inside, and a fastening connector 21 is provided at the top. The bottom of the extension handle assembly 3 is inserted into the connecting rod assembly 2, and a locking cap 31 is provided on its outside to cooperate with the fastening connector 21 to fix the moving length of the extension handle assembly 3. The extension handle assembly 3 and the connecting rod assembly 2 are connected by threads.

[0030] In this embodiment, the threaded connector 22 at the bottom of the connecting rod assembly 2 is screwed into the threaded connection groove 11 at the tail of the drill head 1 to ensure a tight connection between the two. The threaded connection design ensures the stability of the drill head 1 and the connecting rod assembly 2, preventing loosening during surgery.

[0031] Reference Figure 2-5 The connecting rod assembly 2 has a threaded connector 22 extending from its bottom. The drill head 1 has a matching threaded groove 11 at its tail. The connecting rod assembly 2 also includes a connecting rod 23. A fastening connector 21 is located on its top. The fastening connector 21 has a moving hole 24 in the middle that connects to the inside of the connecting rod 23. The inner wall of the moving hole 24 is threaded. The outer wall of the fastening connector 21 has multiple evenly spaced fastening grooves 25. The fastening grooves 25 cooperate with the locking cap 31. A magnetic seat 26 is also provided at the bottom of the outer side of the fastening connector 21. The moving hole 24 has the same size as the bottom of the extension handle assembly 3.

[0032] Specifically, the extension handle assembly 3 includes an extension rod 32, an extension handle 33 vertically fixed to the top of the extension rod 32, a locking cap 31 installed on the outside of the extension rod 32, four evenly spaced positioning grooves 34 on the outer wall of the extension rod 32, and threads on the outer wall of the extension rod 32 that avoid the positioning grooves 34. The locking cap 31 has a through hole 35 in the middle that matches the extension rod 32, a positioning block 36 on the inner wall of the through hole 35 that matches the positioning groove 34, a fastening strip 37 on the inner bottom of the locking cap 31 that matches the fastening groove 25, and a magnetic head 38 at the bottom of the locking cap 31 that matches the magnetic base 26. The size of the locking cap 31 matches the fastening connector 21, and the overall cross-sectional size does not exceed the cross-sectional size of the connecting rod 23.

[0033] In this embodiment, the bottom of the extension rod 32 is inserted into the movable hole 24 of the connecting rod 23, and the extension handle assembly 3 is telescopically adjusted by rotating the thread (the outer thread of the extension rod 32 matches the inner thread of the movable hole 24). The limiting ring 39 at the bottom of the extension rod 32 prevents it from completely disengaging from the connecting rod 23, ensuring operational safety.

[0034] Specifically, the extension rod 32 is provided with a limiting ring 39 at the bottom. The limiting ring 39 is placed inside the connecting rod 23 and restricts the extension rod 32 from moving to the outside of the connecting rod 23. The positioning groove 34 is vertically arranged on the outer wall of the extension rod 32 and its length is consistent with the thread height of the outer wall of the extension rod 32. The thread on the outer wall of the extension rod 32 matches the thread on the inner wall of the moving hole 24.

[0035] Specifically, the outer wall of the locking cap 31 is also provided with multiple anti-slip grooves 310, which are arranged vertically and evenly.

[0036] In this embodiment, the locking cap 31 is rotated so that the positioning block 36 in its through hole 35 is aligned with the positioning groove 34 of the extension rod 32, ensuring that the linear movement of the extension rod 32 is without deviation. After the extension handle assembly 3 is adjusted to the required length, the locking cap 31 is pressed down so that the fastening strip 37 is inserted into the fastening groove 25 of the fastening connector 21, and at the same time, the magnetic head 38 is attracted to the magnetic base 26, achieving double fixation.

[0037] Specifically, the overall length of the extension rod 32 should at least exceed the internal depth of the connecting rod 23.

[0038] In this embodiment, the extension rod 32 is rotated to extend outward along the thread of the moving hole 24 until the target length is reached. The threaded design provides precise length adjustment. Pressing down the locking cap 31 ensures that the extension handle assembly 3 does not shift during the procedure through the mechanical engagement of the fastening strip 37 and the fastening groove 25, and the magnetic attraction of the magnetic head 38 and the magnetic seat 26.

[0039] Specifically, the anti-slip groove 310 on the outer wall of the locking cap 31 makes it easier for doctors to apply force when wearing gloves, thus enhancing operational stability.

[0040] In this embodiment, the threaded extension rod 32 allows for millimeter-level length adjustment to accommodate surgical needs at different bone hole depths. Mechanical fastening combined with magnetic fixation provides strong vibration resistance, eliminating the need for repeated adjustments during surgery. Under simulated vibration conditions, the locking structure showed no displacement. The modular design allows for separate disinfection or replacement of the drill head 1 and the extension shank assembly 3, reducing the risk of cross-infection. Assembly time is shorter than with traditional welded extension rods. The anti-slip groove 310 and lightweight extension rod 32 reduce surgeon fatigue.

[0041] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A segmented extension rod structure for orthopedic drill bits, characterized in that: Includes a connecting rod assembly (2) installed at the tail of the drill bit (1), wherein an extension shank assembly (3) is installed inside the connecting rod assembly (2), and the extension shank assembly (3) moves within the connecting rod assembly (2); The bottom of the connecting rod assembly (2) is threaded to the tail of the drill head (1); The connecting rod assembly (2) is hollow inside, and a fastening connector (21) is provided on its top. The bottom of the extension handle assembly (3) is inserted into the connecting rod assembly (2), and a locking cap (31) is provided on its outside to cooperate with the fastening connector (21) to fix the moving length of the extension handle assembly (3). The extension handle assembly (3) and the connecting rod assembly (2) are threaded together.

2. The segmented extension rod structure for orthopedic drill bits according to claim 1, characterized in that: The bottom of the connecting rod assembly (2) extends a threaded connector (22), and the tail of the drill head (1) is provided with a matching threaded connection groove (11). The connecting rod assembly (2) also includes a connecting rod (23), and the fastening connector (21) is located on its top. The fastening connector (21) is provided with a moving hole (24) in the middle that connects to the inside of the connecting rod (23). The inner wall of the moving hole (24) is provided with threads. The outer wall of the fastening connector (21) is provided with multiple evenly spaced fastening grooves (25). The fastening grooves (25) cooperate with the locking cap (31). The bottom of the outer side of the fastening connector (21) is also provided with a magnetic seat (26). The moving hole (24) is the same size as the bottom of the extension handle assembly (3).

3. The segmented extension rod structure for orthopedic drill bits according to claim 2, characterized in that: The extension handle assembly (3) includes an extension rod (32), an extension handle (33) is vertically fixed to the top of the extension rod (32), a locking cap (31) is installed on the outside of the extension rod (32), four evenly spaced positioning grooves (34) are provided on the outer wall of the extension rod (32), the outer wall of the extension rod (32) is also provided with threads, and the threads are set to avoid the positioning grooves (34), the middle part of the locking cap (31) is provided with a through hole (35) matching the extension rod (32), the inner wall of the through hole (35) is provided with a positioning block (36) matching the positioning groove (34), the bottom of the inner side of the locking cap (31) is provided with a fastening strip (37) matching the fastening groove (25), the bottom of the locking cap (31) is also provided with a magnetic head (38) matching the magnetic base (26), the size of the locking cap (31) matches the fastening connector (21), and the overall cross-sectional size does not exceed the cross-sectional size of the connecting rod (23).

4. The segmented extension rod structure for an orthopedic drill bit according to claim 3, characterized in that: The extension rod (32) is provided with a limiting ring (39) at the bottom. The limiting ring (39) is placed inside the connecting rod (23) and restricts the extension rod (32) from moving to the outside of the connecting rod (23). The positioning groove (34) is vertically arranged on the outer wall of the extension rod (32) and its length is consistent with the thread height of the outer wall of the extension rod (32). The thread of the outer wall of the extension rod (32) matches the thread of the inner wall of the moving hole (24).

5. The segmented extension rod structure for orthopedic drill bits according to claim 3, characterized in that: The outer wall of the locking cap (31) is also provided with multiple anti-slip grooves (310), which are arranged vertically and evenly.

6. The segmented extension rod structure for an orthopedic drill bit according to claim 3, characterized in that: The overall length of the extension rod (32) should at least exceed the internal depth of the connecting rod (23).

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