Modeling micropore drill bit adjusting structure for rat articular cartilage defect

Abstract

The utility model discloses a mouse articular cartilage defect modeling micropore drill bit adjusting structure, which belongs to the technical field of drilling tools and comprises a mounting seat assembled at the output end of an electric drill pen, and a hole is formed in the middle of the mounting seat and a sleeve is welded in the middle of the mounting seat. According to the mouse articular cartilage defect modeling micropore drill bit adjusting structure, the locking block matched with the guide part is extruded when the guide part rotates and descends, so that the locking strip deforms and accumulates force, and the reamer is driven to abut against a hole in the drilling process; when the expanding drill rotates, the hole diameter is expanded through the stepped spiral groove of the expanding drill, and the drilling diameter is adjusted; therefore, the drilling depth and diameter are controllable, drill bits of different specifications do not need to be replaced, the operation time is shortened, the modeling efficiency is improved, the modeling quality is improved, the purchase and storage cost of the drill bits is reduced, finally, the flexibility, precision and efficiency of drilling and modeling operation are improved, the cost and the safety risk are reduced, and animal modeling experiment research is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of drilling tool technology, specifically relating to an adjustable structure for a micro-hole drill bit for modeling rat articular cartilage defects. Background Technology

[0002] Articular cartilage defects and lesions are very common diseases in orthopedic clinics. Trauma and cartilage degeneration are the main factors contributing to articular cartilage defects. Because articular cartilage lacks blood vessels, nerves, and lymphatic tissue, its self-repair capacity is limited, and it is difficult to repair itself once damaged. Articular cartilage defect modeling is a commonly used animal modeling method in joint disease research, mainly used to simulate human articular cartilage defects and explore their repair methods. By selecting appropriate animal types and modeling methods, and conducting rigorous experimental design and data analysis, strong support can be provided for research on articular cartilage defects. In articular cartilage defect modeling, the commonly used animal is the SD rat (Sprague Dawley rat, a commonly used laboratory animal). This animal has advantages such as rapid growth, high reproductive capacity, ease of breeding, and simple experimental operation. Furthermore, their joint structure is highly similar to that of humans; therefore, the modeling results of SD rats can provide effective evidence for the study of human articular cartilage defect diseases.

[0003] The most common method for creating a rat articular cartilage defect model is the drilling method: a 1cm incision is made on the medial side of the rat's knee joint, a small incision is made in the patellar ligament, and the patellar ligament is everted to expose the knee joint. A small hole is then drilled in the cartilage of the distal femoral trochlear groove using a miniature electric drill. Tungsten carbide twist drills are often used as the modeling tool when preparing rat knee articular cartilage defect models because they are characterized by high hardness and resistance to deformation. However, these characteristics of tungsten carbide twist drills limit their flexibility; the diameter is not adjustable, and the depth is uncontrollable. Furthermore, the articular cartilage surface of rats is very small, and the drilling depth and diameter are generally within 2mm. Using this type of drill can easily penetrate into the medullary cavity, causing problems with the model and affecting the experimental results. When experiments require drilling holes of different depths or diameters into the articular cartilage of mice, experimenters must change drill bits of different specifications. This not only reduces modeling efficiency and hole quality, making it difficult to control experimental variables and affecting experimental results, but also causes hand injuries due to frequent drill bit changes. Furthermore, experimenters need to prepare different drill bits for different hole sizes, increasing purchasing and storage costs, affecting the accuracy, efficiency, and flexibility of drilling and modeling operations, and increasing safety risks. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable structure for a micro-hole drill bit for modeling rat articular cartilage defects, aiming to solve the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A micro-drill bit adjustment structure for modeling rat articular cartilage defects includes a mounting base assembled on the output end of an electric drill. The mounting base has a hole in the middle and a sleeve welded thereon. A locking element is fixedly installed inside the sleeve and has a groove on its inner wall with a locking thread. A locking strip is integrally provided on the locking element, and a locking block is integrally provided at the top of the locking strip. A drill bit is slidably connected to the hole in the middle of the locking element.

[0007] The sleeve is threadedly connected to a fixed seat via the locking thread. The fixed seat has a fixed ring and a reamer integrally formed at its bottom and top, respectively. The reamer has a through hole in the middle and a insertion hole.

[0008] In a preferred embodiment of this utility model, the outer wall of the fixing ring is provided with a thread that matches the locking thread, the locking screwing direction of the fixing ring is opposite to the rotation direction of the electric drill, and the length of the fixing ring is the same as the depth of the sleeve.

[0009] In a preferred embodiment of this utility model, the insertion hole is adapted to the drill bit and maintains a sliding connection, and the length of the drill bit is greater than the sum of the lengths of the sleeve and the fixing seat.

[0010] In a preferred embodiment of this utility model, the reaming drill is stepped and has a spiral groove on its outer wall.

[0011] In a preferred embodiment of this utility model, the bottom wall of the fixing ring is provided with a guide portion at an inclination, and the guide portion is adapted to the locking block.

[0012] In a preferred embodiment of this utility model, the locking strips are arranged in a circumferential array and a locking gap is reserved, and the sleeve and the locking member both have through holes in the middle to maintain a sliding connection with the drill bit.

[0013] In a preferred embodiment of this utility model, the locking strip is made of metal and has elasticity.

[0014] In a preferred embodiment of this utility model, the diameter of the fixing seat is larger than the diameter of the sleeve, and the outer circumferential wall of the fixing seat is provided with anti-slip protrusions.

[0015] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0016] This invention relates to a micro-drill adjustment structure for modeling rat articular cartilage defects. When the guide part rotates and descends, it compresses a corresponding locking block. This compression causes the locking block to converge towards the center, deforming the locking strip and storing force, effectively locking the drill bit's outer wall and fixing it in place. By reverse-screwing the fixing seat, the guide part at the bottom of the fixing ring separates from the locking block, releasing the compression and thus the locking of the drill bit. This allows the drill bit to slide and adjust within the insertion hole, adjusting the drill bit's extension length and thus the drilling depth. The drilling process involves adjusting the drill bit; simultaneously, the drill bit is slid into the insertion hole, making the end of the drill bit flush with the insertion hole. This causes the reamer to come into contact with the hole during drilling, and as the reamer rotates, its stepped spiral grooves expand the hole diameter, thus adjusting the drilling diameter. This allows for controllable drilling depth and diameter, eliminating the need to change drill bits of different specifications, reducing operation time, improving modeling efficiency and quality, and lowering the purchase and storage costs of drill bits. Ultimately, this enhances the flexibility, accuracy, and efficiency of drilling and modeling operations, reduces costs and safety risks, and is beneficial for animal modeling experimental research. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0019] Figure 3 This is a schematic diagram of a partially disassembled structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0022] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Mounting base; 2. Sleeve; 3. Locking thread; 4. Locking element; 5. Locking strip; 6. Locking block; 7. Drill bit; 8. Fixing base; 9. Fixing ring; 10. Reamer; 11. Anti-slip protrusion; 12. Insertion hole; 13. Guide part. Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0024] Example:

[0025] like Figure 1-5 As shown, this embodiment provides a micro-hole drill bit adjustment structure for modeling rat articular cartilage defects, including a mounting base 1 assembled on the output end of an electric drill. The mounting base 1 has an opening in the middle and a sleeve 2 welded thereon. A locking component 4 is fixedly installed inside the sleeve 2 and the inner wall is grooved with a locking thread 3. A locking strip 5 is integrally provided on the locking component 4. A locking block 6 is integrally provided at the top of the locking strip 5. A drill bit 7 is slidably connected to the opening in the middle of the locking component 4.

[0026] The sleeve 2 is threadedly connected to the fixing seat 8 via the locking thread 3. The bottom and top of the fixing seat 8 are respectively provided with a fixing ring 9 and a reamer 10. The reamer 10 has a through hole in the middle and a insertion hole 12.

[0027] In a specific application scenario, when the guide part 13 rotates and descends, it squeezes the locking block 6 that is adapted to it. This squeezing of the locking block 6 causes it to move towards the center, causing the locking strip 5 to deform and store force. In effect, this locks the outer wall of the drill bit 7, fixing the drill bit 7 in place. By rotating the fixing seat 8 in the opposite direction, the guide part 13 at the bottom of the fixing ring 9 is separated from the locking block 6, releasing the squeezing of the locking block 6 and thus releasing the locking of the drill bit 7. This allows the drill bit 7 to slide and adjust within the insertion hole 12, adjusting the extension length of the drill bit 7 from the insertion hole 12, thereby adjusting the drilling depth of the drill bit 7. At the same time, the drill bit 7 is slid into the insertion hole 12, making the end of the drill bit 7 flush with the insertion hole 12. This causes the reamer 10 to come into contact with the hole during the drilling process. As the reamer 10 rotates, the stepped spiral groove of the reamer 10 expands the hole diameter, thus adjusting the drilling diameter. The following description further illustrates the micro-hole drill bit adjustment structure for modeling rat articular cartilage defects, based on this application scenario.

[0028] Furthermore, referring to Figure 1-5 The outer wall of the retaining ring 9 is provided with a thread that matches the locking thread 3. The locking screwing direction of the retaining ring 9 is opposite to the rotation direction of the electric drill. The length of the retaining ring 9 is the same as the depth of the sleeve 2.

[0029] In this embodiment, in order to maintain a tight connection between the sleeve 2 and the fixed seat 8 and prevent the sleeve 2 and the fixed seat 8 from separating due to high-speed rotation during the drilling operation of the electric drill, the sleeve 2 and the fixed seat 8 are connected by a locking thread 3, while the locking and tightening direction of the fixing ring 9 is restricted to be opposite to the rotation direction of the electric drill. At the same time, the length of the fixing ring 9 is set to be consistent with the depth of the sleeve 2, so that the fixing ring 9 can be completely accommodated in the sleeve 2 after the sleeve 2 and the fixed seat 8 are connected by threads, thereby improving the overall integrity.

[0030] In more detail, refer to Figure 1-5 The insertion hole 12 is adapted to the drill bit 7 and maintains a sliding connection. The length of the drill bit 7 is greater than the sum of the lengths of the sleeve 2 and the fixed seat 8.

[0031] In this embodiment, in order to allow the drill bit 7 to freely adjust and extend within the insertion hole 12, the length of the drill bit 7 is limited to be greater than the sum of the lengths of the sleeve 2 and the fixing seat 8, so that the drill bit 7 will not be completely retracted into the insertion hole 12, causing the drilling function to fail. At the same time, in order to maintain the smooth adjustment of the drill bit 7, the insertion hole 12 is designed to be compatible with the drill bit 7 and maintain a sliding connection.

[0032] More preferably, refer to Figure 1-5 The reaming drill 10 is stepped and has spiral grooves on its outer wall.

[0033] In this embodiment, in order to adjust the borehole diameter during the drilling process for modeling cartilage defects in rat articular articulars, the reamer 10 is set in a stepped shape and has a spiral groove on its outer wall. As the reamer 10 rotates, the borehole diameter is enlarged according to the depth of the reamer 10, thereby adjusting the borehole diameter.

[0034] More preferably, refer to Figure 1-5 The bottom wall of the fixing ring 9 is inclined and has a guide part 13, which is adapted to the locking block 6.

[0035] In this embodiment, in order to lock and fix the drill bit 7, a guide part 13 is inclinedly provided on the bottom wall of the fixing ring 9. The guide part 13 is adapted to the locking block 6, so that when the guide part 13 descends, it squeezes the locking block 6, thereby squeezing the locking block 6 and causing the locking block 6 to move towards the middle synchronously, so that the locking strip 5 deforms and stores force, which essentially locks the outer wall of the drill bit 7 and fixes the drill bit 7.

[0036] Furthermore, referring to Figure 1-5 The locking strips 5 are arranged in a circular array and have a reserved locking gap. The sleeve 2 and the locking part 4 both have through holes in the middle and are slidably connected to the drill bit 7.

[0037] In this embodiment, as the locking block 6 is squeezed and retracted by the guide part 13, the locking strip 5 will also deform. In order to avoid collision and jamming between the locking strips 5 during the deformation process, a locking gap is reserved between the locking strips 5 to preserve the deformation space of the locking strips 5 and maintain the independence of the locking strips 5. The sleeve 2 and the locking part 4 are both provided with through holes in the middle to maintain a sliding connection with the drill bit 7, so that the drill bit 7 can be slidably adjusted within the sleeve 2 and the locking part 4.

[0038] Furthermore, referring to Figure 1-5 The locking strip 5 is made of metal and is elastic.

[0039] In this embodiment, since the locking bar 5 will deform during the process of the locking block 6 being squeezed and retracted, in order to prevent the locking bar 5 from failing to reset after deformation, the locking bar 5 is made of metal and has elasticity, so that the locking bar 5 and the locking block 6 can reset themselves after the pressure of the guide part 13 is removed, thus avoiding interference with the sliding of the drill bit 7.

[0040] More specifically, refer to Figure 1-5 The diameter of the fixed seat 8 is larger than the diameter of the sleeve 2, and the outer circumferential wall of the fixed seat 8 is provided with anti-slip protrusions 11.

[0041] In this embodiment, in order to facilitate the user to rotate and adjust the fixed seat 8 from the outside, anti-slip protrusions 11 are provided on the outer circumferential wall of the fixed seat 8 to increase the friction of the outer circumferential wall of the fixed seat 8, making it easier to rotate and drive the fixed seat 8 and improving convenience.

[0042] It should be noted that the drill pen is a miniature power tool that combines the design of a drill and a pen, enabling drilling operations down to the millimeter level.

[0043] Working principle:

[0044] The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects of this utility model, during the assembly of the drill bit 7, first inserts the drill bit 7 into the insertion hole 12 and the through hole of the sleeve 2 and the locking part 4, and adjusts the extension length of the drill bit 7 from the insertion hole 12 by sliding. Then, the fixing seat 8 is screwed so that the thread on the outer wall of the fixing ring 9 is threadedly locked with the locking thread 3 on the inner wall of the sleeve 2. During the locking process, the fixing ring 9 is actually rotated and inserted into the sleeve 2, which drives the guide part 13 on the bottom wall of the fixing ring 9 to descend synchronously. When the guide part 13 descends, it also squeezes the locking block 6 that is adapted to it. Thus, by squeezing the locking block 6, the locking block 6 is driven to shrink towards the middle synchronously, so that the locking strip 5 deforms and stores force, which essentially locks the outer wall of the drill bit 7 and fixes the drill bit 7.

[0045] During the process of creating a model of a mouse articular cartilage defect, the installation base 1 mounted on the output end is rotated by starting the electric drill. The installation base 1 is welded to the sleeve 2, thereby causing the sleeve 2 to rotate as a whole. The sleeve 2 then causes the drill bit 7 locked inside the internal locking part 4 to rotate synchronously, thus drilling a hole in the mouse articular cartilage.

[0046] To adjust the drilling depth and diameter of the rat articular cartilage, the guide portion 13 at the bottom of the fixing ring 9 is separated from the locking block 6 by reverse screwing the fixing seat 8, thereby releasing the compression of the locking block 6 and releasing the locking of the drill bit 7. This allows the drill bit 7 to slide within the insertion hole 12, adjusting the extension length of the drill bit 7 from the insertion hole 12, thus adjusting the drilling depth of the drill bit 7. Simultaneously, the drill bit 7 is slid into the insertion hole 12, making the end of the drill bit 7 flush with the insertion hole 12. This causes the reamer 10 to come into contact with the hole during drilling, and as the reamer 10 rotates, the stepped spiral groove of the reamer 10 expands the hole diameter, thus adjusting the drilling diameter.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A micro-drill bit adjustment structure for modeling rat articular cartilage defects, comprising a mounting base (1) assembled on the output end of an electric drill, characterized in that... : The mounting base (1) has a hole in the middle and a sleeve (2) is welded thereon. A locking component (4) is fixedly installed inside the sleeve (2) and the inner wall is grooved with a locking thread (3). A locking strip (5) is integrally provided on the locking component (4). A locking block (6) is integrally provided at the top of the locking strip (5). A drill bit (7) is slidably connected to the hole in the middle of the locking component (4). The sleeve (2) is threadedly connected to a fixed seat (8) via the locking thread (3). The fixed seat (8) is integrally provided with a fixed ring (9) at the bottom and a reamer (10) at the top. The reamer (10) has a through hole (12) in the middle.

2. The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects according to claim 1, characterized in that, The outer wall of the fixing ring (9) is provided with a thread that matches the locking thread (3). The locking screwing direction of the fixing ring (9) is opposite to the rotation direction of the electric drill. The length of the fixing ring (9) is consistent with the depth of the sleeve (2).

3. The micro-hole drill bit adjustment structure for rat articular cartilage defect modeling according to claim 1, characterized in that, The insertion hole (12) is adapted to the drill bit (7) and maintains a sliding connection. The length of the drill bit (7) is greater than the sum of the lengths of the sleeve (2) and the fixing seat (8).

4. The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects according to claim 1, characterized in that, The reamer (10) is stepped and has spiral grooves on its outer wall.

5. The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects according to claim 1, characterized in that, The bottom wall of the fixing ring (9) is inclined and has a guide part (13), which is adapted to the locking block (6).

6. The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects according to claim 1, characterized in that, The locking strips (5) are arranged in a circumferential array and have a reserved locking gap. The sleeve (2) and the locking member (4) both have through holes in the middle and are slidably connected to the drill bit (7).

7. The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects according to claim 1, characterized in that, The locking strip (5) is made of metal and has elasticity.

8. The micro-hole drill bit adjustment structure for modeling rat articular cartilage defects according to claim 1, characterized in that, The diameter of the fixed seat (8) is larger than the diameter of the sleeve (2), and the outer circumferential wall of the fixed seat (8) is provided with anti-slip protrusions (11).

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