Medical grinding device

Abstract

The utility model relates to a medical grinding device which comprises a handle and a cutter. The handle is provided with a handle connector, and the handle connector is provided with first threads. The cutter comprises a supporting handle body, the supporting handle body is provided with second threads matched with the first threads, and the cutter is detachably connected with the handle through the first threads and the second threads. Thus, the handle is matched with the cutter through the first thread and the second thread, the handle connector and the supporting handle body are connected together in a threaded mode, the supporting handle body and the handle connector have no movement allowance in the circumferential direction or the radial direction, and movement in the circumferential direction and the radial direction can be effectively prevented; the installation stability is high, the high-speed operation stability of the cutter can be guaranteed, and therefore the cutter is suitable for an operation with the high requirement for grinding precision or cutting precision.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a medical grinding device. Background Technology

[0002] Medical grinding devices are surgical power devices used for tasks such as grinding and cutting tissues. They are widely used in orthopedic or surgical procedures such as spinal surgery, UBE (unilateral biportal endoscopic) surgery, arthroscopy, joint replacement of large and small bones, craniotomy, ENT surgery, transnasal skull base surgery, laparoscopic surgery, and cosmetic minimally invasive surgery.

[0003] Medical grinding devices in related technologies include a handle and a cutting tool, typically connected via a snap-fit ​​mechanism. Specifically, the cutting tool includes a support shank with a hook at its proximal end. The handle has a handle interface at its distal end, with a resilient retaining part on its outer wall. The handle interface is axially inserted into the support shank. When the handle interface and support shank are in place, the hook and resilient retaining part engage to achieve a secure and aligned assembly. However, regardless of whether it's circumferential or radial, the cutting tool exhibits some degree of movement relative to the handle, resulting in poor installation stability and making it unsuitable for surgeries requiring high grinding or cutting precision. Utility Model Content

[0004] Therefore, it is necessary to overcome the shortcomings of existing technologies and provide a medical grinding device that can improve the installation stability of cutting tools.

[0005] A medical grinding device, the medical grinding device comprising:

[0006] The handle has a handle interface, and the handle interface has a first thread;

[0007] The cutting tool includes a support shank, the support shank being provided with a second thread adapted to the first thread, and the cutting tool and the handle being detachably connected via the first thread and the second thread.

[0008] In one embodiment, the first thread is provided on the outer wall of the handle interface; the support handle has a through hole extending along its axial direction, the second thread is provided on the inner wall of the through hole, and the handle interface is inserted into the through hole and connected to the support handle.

[0009] In one embodiment, the cutting tool further includes a first sealing ring disposed between the outer wall of the handle interface and the inner wall of the through hole.

[0010] In one embodiment, the first sealing ring is disposed at the proximal end of the support handle, and the second thread and the first sealing ring are arranged sequentially at intervals along the axial direction of the support handle; the first thread is disposed at the distal end of the handle interface.

[0011] In one embodiment, a first protrusion is wound around the inner wall of the through hole, and a second thread is formed on the first protrusion; and / or, a second protrusion is wound around the inner wall of the through hole, and a first groove is wound around the second protrusion, and the first sealing ring is installed inside the first groove.

[0012] In one embodiment, the tool further includes an anti-slip sleeve that is fitted over the outside of the support handle.

[0013] In one embodiment, the outer wall of the support handle is provided with a mounting groove extending around its circumference, and the anti-slip sleeve is fitted inside the mounting groove.

[0014] In one embodiment, a spiral groove is formed on the bottom wall of the mounting slot.

[0015] In one embodiment, the first thread extends counterclockwise from the distal end to the proximal end of the handle interface; and,

[0016] The cutting tool also includes a second sealing ring, which is disposed between the proximal end face of the support shank and the handle, and the proximal end face of the support shank abuts against the handle.

[0017] In one embodiment, the handle further includes a housing and a power mechanism, the power mechanism being disposed inside the housing;

[0018] The cutting tool also includes an outer cutting tube and an inner cutting rod. The outer cutting tube is connected to the support handle body, and the inner cutting rod is rotatably inserted through the outer cutting tube and the handle interface. The proximal end of the inner cutting rod is connected to the power mechanism.

[0019] The aforementioned medical grinding device features a handle and a cutting tool that are detachably connected via a first thread and a second thread. This allows the handle interface and the support shank to be connected together by threads, ensuring that there is no room for movement between the support shank and the handle interface in either the circumferential or radial direction. This effectively prevents movement along the circumferential and radial directions, resulting in high installation stability and ensuring the smooth operation of the cutting tool at high speeds. Consequently, it is suitable for surgeries requiring high grinding or cutting precision. Attached Figure Description

[0020] Figure 1This is a structural diagram of a medical grinding apparatus according to an embodiment of this application.

[0021] Figure 2 for Figure 1 The exploded view of the medical grinding device shown.

[0022] Figure 3 for Figure 2 The diagram shows the structure of the handle of the medical grinding device.

[0023] Figure 4 for Figure 1 The diagram shows the internal structure of the medical grinding device.

[0024] Figure 5 for Figure 4 Enlarged structural diagram at point A.

[0025] 10. Handle; 11. Handle interface; 111. First thread; 12. Housing; 13. Power mechanism; 131. First mating joint; 20. Cutting tool; 21. Support shank body; 211. First protrusion; 2111. Second thread; 212. Second protrusion; 2121. First groove; 213. Clearance area; 214. Mounting slot; 2141. Groove; 215. Second groove; 22. First sealing ring; 23. Anti-slip sleeve; 24. Outer blade tube; 25. Inner blade shank; 26. Second mating joint; 27. Inner shank body; 28. Bearing; 29. ​​Third sealing ring. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be noted that "proximal end" refers to the end of the instrument or component closer to the operator, and "distal end" refers to the end of the instrument or component farther from the operator; "axial" refers to the direction parallel to the line connecting the centers of the distal and proximal ends of the instrument or component, "radial" refers to the direction perpendicular to the axial direction, and "circumferential" refers to the direction surrounding the axial direction. It should be noted that the axial direction in this embodiment refers to... Figure 1 or Figure 2 The direction indicated by Z.

[0028] See Figures 1 to 3 , Figure 1 A structural diagram of a medical grinding apparatus according to an embodiment of this application is shown. Figure 2 It shows Figure 1The exploded view of the medical grinding device shown. Figure 3 It shows Figure 2 The diagram shows the structure of the handle 10 of the medical grinding device. One embodiment of this application provides a medical grinding device, which includes a handle 10 and a cutting tool 20.

[0029] Please see Figures 3 to 5 , Figure 4 It shows Figure 1 The diagram shows the internal structure of the medical grinding device. Figure 5 It shows Figure 4 Enlarged structural view at point A. The handle 10 is provided with a handle interface 11, and the handle interface 11 is provided with a first thread 111. Optionally, the first thread 111 may be provided at the distal end of the handle interface 11, or it may be provided at any part or in the entire area from the distal end to the proximal end of the handle interface 11 according to actual needs.

[0030] In addition, the cutting tool 20 includes a support shank 21. The support shank 21 is provided with a second thread 2111 that is adapted to the first thread 111, and the cutting tool 20 and the handle 10 are detachably connected via the first thread and the second thread.

[0031] In the aforementioned medical grinding device, the handle 10 and the cutting tool 20 are engaged by the first thread 111 and the second thread 2111, so that the handle interface 11 and the support handle 21 are detachably connected together by threads. In this way, the support handle 21 and the handle interface 11 have no room for movement in either the circumferential or radial direction, which can effectively prevent movement in the circumferential and radial directions, resulting in high installation stability and ensuring the smooth operation of the cutting tool 20 at high speed. Therefore, it is suitable for surgeries with high requirements for grinding or cutting accuracy.

[0032] When it is necessary to separate the handle 10 from the tool 20, it can be done by rotating the handle 10 and the tool 20 relative to each other. The disassembly and assembly operation is simple and easy to implement.

[0033] For example, the first thread may be provided on the outer wall of the handle interface 11. The support handle 21 has a through hole extending along its axial direction, and the second thread is correspondingly provided on the inner wall of the through hole. The handle interface 11 is inserted into the through hole and connected to the support handle 21. Alternatively, the first thread may be provided on the inner wall of the handle interface 11; the second thread may be correspondingly provided on the outer wall of the support handle 21, and the support handle 21 may be inserted into the handle interface 11 and connected to the handle interface 11.

[0034] In this embodiment, the first thread is provided on the outer wall of the handle interface 11, the support handle 21 has a through hole extending along its axial direction, and the second thread is provided on the inner wall of the through hole, but this is not a limitation.

[0035] Please see Figures 3 to 5 In one embodiment, the first thread 111 extends counterclockwise from the distal end to the proximal end of the handle interface 11. Thus, when the cutter 20 is rotated clockwise, it locks with the handle 10; when rotated counterclockwise, it separates from the handle 10. Therefore, during operation of the medical grinding device, medical personnel typically rotate the cutter 20 clockwise for various surgical procedures. Based on the rotation direction of the first thread 111, the cutter 20 locks with the handle 10, preventing loosening and effectively preventing circumferential and radial movement. This ensures high installation stability and smooth high-speed operation of the cutter 20, making it suitable for surgeries requiring high grinding or cutting precision.

[0036] Of course, as some alternatives, the first thread 111 may also be provided to extend in a clockwise direction from the distal end to the proximal end of the handle interface 11.

[0037] In one embodiment, the cutting tool 20 further includes a first sealing ring 22. The first sealing ring 22 is disposed between the outer wall of the handle interface 11 and the inner wall of the through hole. In this way, the first sealing ring 22 can achieve a good sealing effect between the handle interface 11 and the support handle body 21, thereby reducing the noise generated by the power mechanism 13 inside the handle 10 during operation, reducing vibration, and eliminating radial movement, so that the handle interface 11 and the support handle body 21 form a stable and reliable fit, and at the same time, it provides damping during insertion and removal, thereby improving the feel of the assembly operation.

[0038] Optionally, the first sealing ring 22 is an elastic ring, which can play a better role in vibration reduction.

[0039] Optionally, the first sealing ring 22 may include, but is not limited to, a structure with an axial cross-section of a circle, ellipse, polygon, or other regular or irregular shapes. The specific shape can be flexibly adjusted and set according to actual needs, and is not limited here.

[0040] It should be noted that the first thread 111 can be arranged at any part or in all areas of the handle interface 11 from the proximal end to the distal end. The specific arrangement can be flexibly adjusted and set according to actual needs, and is not limited here. Similarly, the first sealing ring 22 can also be arranged at any part of the handle interface 11 from the proximal end to the distal end, as long as it can achieve a sealing fit between the outer wall of the handle interface 11 and the inner wall of the through hole. The specific setting position is not limited here.

[0041] In one specific embodiment, the first sealing ring 22 is disposed at the proximal end of the support handle 21, and the second thread 2111 and the first sealing ring 22 are arranged sequentially and at intervals along the axial direction of the support handle 21. The first thread 111 is disposed at the distal end of the handle interface 11. Thus, the first sealing ring 22 is positioned close to the junction of the support handle 21 and the handle 10, and thus close to the connection position between the power mechanism 13 of the handle 10 and the inner shank 25 of the tool 20, thereby providing a better buffering effect and a better vibration reduction effect.

[0042] In one embodiment, a first protrusion 211 is wound around the inner wall of the through hole, and a second thread 2111 is formed on the first protrusion 211. A second protrusion 212 is wound around the inner wall of the through hole, and a first groove 2121 is wound around the second protrusion 212. A first sealing ring 22 is installed inside the first groove 2121. An air gap 213 is formed in the area between the first protrusion 211 and the second protrusion 212 on the inner wall of the through hole. The air gap 213 can prevent over-positioning. The air in the cavity formed is a poor conductor of heat, which can help to isolate the heat generated by the high-speed rotating bearing 28 and reduce the heat generation of the handle 10. In addition, the thin-walled structure formed by the air gap 213 can help the tool absorb vibration when rotating at high speed, ensuring the effect of the sealing ring at the rear end of the cavity. In addition, it can also reduce the material, thereby reducing weight and saving costs.

[0043] It should be noted that in this embodiment, the "first protrusion 211 and the second protrusion 212" can be a part of the "support handle 21", that is, the "first protrusion 211 and the second protrusion 212" are integrally formed with the "other parts of the support handle 21"; or they can be an independent component that can be separated from the "other parts of the support handle 21", that is, the "first protrusion 211 and the second protrusion 212" can be manufactured independently and then combined with the "other parts of the support handle 21" to form a whole.

[0044] Please see Figure 3 and Figure 5 In one embodiment, the cutting tool 20 further includes an anti-slip sleeve 23. The anti-slip sleeve 23 is fitted over the outside of the support handle 21. Thus, the anti-slip sleeve 23 serves to prevent slippage and improve ease of operation.

[0045] In one embodiment, the support handle 21 is provided with a mounting groove 214 extending around its circumference, and the anti-slip sleeve 23 is installed inside the mounting groove 214. In this way, the mounting groove 214 limits the anti-slip sleeve 23 along its axial direction, effectively preventing the anti-slip sleeve 23 from moving along the axial direction of the support handle 21, so that the anti-slip sleeve 23 is stably installed on the support handle 21.

[0046] Specifically, the outer wall surface of the anti-slip sleeve 23 is flush with the outer wall surface of the support handle 21.

[0047] Optionally, the anti-slip sleeve 23 may include, but is not limited to, a sleeve made of silicone or other rubber materials. This improves the grip feel, helps absorb vibrations, and effectively prevents the handle 10 from overheating.

[0048] Optionally, the outer wall of the anti-slip sleeve 23 may be provided with anti-slip textures of various patterns and / or multiple anti-slip protrusions, so that the anti-slip sleeve 23 can play an anti-slip role.

[0049] In one embodiment, a spiral groove 2141 is formed on the bottom wall of the mounting groove 214. Thus, when the spiral groove 2141 contacts the inner wall of the anti-slip sleeve 23, it can effectively prevent the anti-slip sleeve 23 from rotating relative to the support handle 21, thereby improving the stability of the anti-slip sleeve 23 on the support handle 21.

[0050] In one embodiment, the cutting tool 20 further includes a second sealing ring (not shown in the figure). The second sealing ring is disposed between the proximal end face of the support shank 21 and the handle 10, with the proximal end face of the support shank 21 abutting against the handle 10. Thus, the second sealing ring provides a sealing function, effectively reducing noise and, due to its elasticity, absorbing vibration, thereby preventing loosening between the handle 10 and the cutting tool 20.

[0051] Optionally, the specific shape of the second sealing ring is similar to that of the first sealing ring 22, including but not limited to a structure with an axial cross-section of a circle, ellipse, polygon, or other regular or irregular shapes. The specific shape can be flexibly adjusted and set according to actual needs, and is not limited here.

[0052] Based on the aforementioned embodiment, a second groove 215 is formed on the proximal end face of the support handle 21, and a second sealing ring is installed inside the second groove 215.

[0053] In one embodiment, the handle 10 further includes a housing 12 and a power mechanism 13. The handle interface 11 is connected to the distal end face of the housing 12, and the power mechanism 13 is disposed inside the housing 12. Furthermore, the cutting tool 20 includes an outer cutting tube 24 and an inner cutting shank 25. The outer cutting tube 24 is connected to the support handle body 21, and the inner cutting shank 25 is rotatably inserted through the outer cutting tube 24 and the handle interface 11. The proximal end of the inner cutting shank 25 is connected to the power mechanism 13.

[0054] Optionally, the power mechanism 13 may include, but is not limited to, a micro motor. Specifically, the micro motor is connected to the host computer via a cable, transmitting signals between them. The power shaft of the micro motor is connected to the inner tool holder 25. Under the control of the host computer, the tool holder is driven to rotate, thereby achieving operations such as grinding and cutting.

[0055] In some embodiments, the power mechanism 13 is provided with a first mating joint 131, and the proximal end of the inner tool holder 25 is provided with a second mating joint 26. The first mating joint 131 and the second joint are connected, for example, by insertion. When the first mating joint 131 and the second joint are connected to each other, the power mechanism 13 drives the first mating joint 131 to rotate, and the first mating joint 131 transmits power to the second mating joint 26. The second mating joint 26 correspondingly drives the inner tool holder 25 to rotate, thereby realizing the grinding or cutting action.

[0056] In some embodiments, the cutting tool 20 further includes an inner shank 27. The inner shank 27 extends into the handle interface 11 and forms a supporting engagement with the inner wall of the handle interface 11. Furthermore, an inner shank 25 is rotatably disposed within the inner shank 27. Additionally, the cutting tool 20 includes a bearing 28 disposed within the inner shank 27, and the inner shank 25 passes through the bearing 28. This significantly reduces the cantilever length in the product structure of related technologies, improves the performance of the structure during high-speed operation, reduces noise and vibration, and enhances operational stability.

[0057] In some embodiments, the tool 20 further includes a third sealing ring 29. The third sealing ring 29 is disposed between the outer wall of the inner shank body 27 and the inner wall of the handle interface 11. The number of third sealing rings 29 includes, but is not limited to, one, two, three, or any other arbitrary number, which can be flexibly adjusted and set according to actual needs. In this way, not only is a first sealing ring 22 provided on the outer wall of the handle interface 11, but a third sealing ring 29 is also provided on the inner wall of the handle interface 11, which can improve the sealing effect, thereby reducing the noise generated by the power mechanism 13 inside the handle 10 during operation, reducing vibration, and eliminating radial movement, so that the handle interface 11 and the support shank body 21 form a stable and reliable fit, while forming damping during insertion and removal, thus improving the feel of the assembly operation.

[0058] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A medical grinding device, characterized in that, The medical grinding device includes: The handle has a handle interface, and the handle interface has a first thread; The cutting tool includes a support shank, the support shank being provided with a second thread adapted to the first thread, and the cutting tool and the handle being detachably connected via the first thread and the second thread.

2. The medical grinding device according to claim 1, characterized in that, The first thread is provided on the outer wall of the handle interface; the support handle has a through hole extending along its axial direction, the second thread is provided on the inner wall of the through hole, and the handle interface is inserted into the through hole and connected to the support handle.

3. The medical grinding device according to claim 2, characterized in that, The cutting tool also includes a first sealing ring, which is disposed between the outer wall of the handle interface and the inner wall of the through hole.

4. The medical grinding device according to claim 3, characterized in that, The first sealing ring is disposed at the proximal end of the support handle, and the second thread and the first sealing ring are arranged alternately along the axial direction of the support handle; the first thread is disposed at the distal end of the handle interface.

5. The medical grinding device according to claim 4, characterized in that The inner wall of the through hole is provided with a first protrusion, and the second thread is formed on the first protrusion; and / or, the inner wall of the through hole is provided with a second protrusion, the second protrusion is provided with a first groove, and the first sealing ring is installed inside the first groove.

6. The medical grinding device according to claim 1, characterized in that The cutting tool also includes an anti-slip sleeve, which is fitted over the outside of the support handle.

7. The medical grinding device according to claim 6, characterized in that, The outer wall of the support handle is provided with a mounting groove extending around its circumference, and the anti-slip sleeve is installed inside the mounting groove.

8. The medical grinding device according to claim 7, characterized in that, The bottom wall of the mounting groove has a spiral groove.

9. The medical grinding device according to claim 1, characterized in that, The first thread extends counterclockwise from the distal end to the proximal end of the handle interface; and, The cutting tool also includes a second sealing ring, which is disposed between the proximal end face of the support shank and the handle, and the proximal end face of the support shank abuts against the handle.

10. The medical grinding device according to claim 1, characterized in that, The handle also includes a housing and a power mechanism, the power mechanism being disposed inside the housing; The cutting tool also includes an outer cutting tube and an inner cutting rod. The outer cutting tube is connected to the support handle body, and the inner cutting rod is rotatably inserted through the outer cutting tube and the handle interface. The proximal end of the inner cutting rod is connected to the power mechanism.

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