Medical milling cutter head, medical milling cutter and medical milling cutter

Abstract

The utility model discloses a medical milling cutter head, a medical milling cutter and a medical milling cutter, and the medical milling cutter head comprises a cutter head section, a cutter head section and a cutter head section, the blade part is arranged on the outer wall of the tool bit section and extends in the axial direction of the tool bit section; and the tool nose part is arranged at one end of the tool bit section. According to the technical scheme, the service life of the medical milling cutter head is prolonged, and the cutting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a medical milling cutter head, a medical milling tool and a medical milling cutter. Background Art

[0002] Medical milling cutters are widely used in orthopedic surgery to mill bone tissue.

[0003] There is a medical milling cutter with a spiral blade portion on the outer wall of the cutter head. When the cutter head rotates at high speed, the spiral blade portion mills bone tissue.

[0004] However, this traditional medical milling cutter head design is relatively simple in function, and the spiral design results in a short tool life and low cutting efficiency. Utility Model Content

[0005] The main purpose of the utility model is to provide a medical milling cutter head, aiming to improve the service life and cutting efficiency of the medical milling cutter head.

[0006] To achieve the above-mentioned purpose, the medical milling cutter head proposed in the present invention comprises:

[0007] Cutting head section;

[0008] a blade portion, provided on the outer wall of the cutter head segment and extending along the axial direction of the cutter head segment; and

[0009] The blade tip is arranged at one end of the blade head section.

[0010] In one embodiment, the blade tip portion has two inclined first side walls and two oppositely arranged second side walls, the two first side walls intersect at one end of the blade tip portion away from the blade head segment, and the distance between the two second side walls is less than the thickness of the blade head segment.

[0011] In one embodiment, the blade portion is arranged to be inclined, and the inclination direction of the blade portion is the same as the rotation direction of the cutter head segment.

[0012] In one embodiment, the outer wall of the cutter head segment is provided with a plurality of the cutting edge portions, the plurality of cutting edge portions are arranged at intervals and the inclination direction of each cutting edge portion is the same as the rotation direction of the cutter head segment; and / or,

[0013] The blade head section is prism-shaped and has a plurality of side edges, and each side edge is correspondingly provided with a blade portion.

[0014] In one embodiment, the medical milling cutter head further comprises a cutter body segment, which is provided at an end of the cutter head segment away from the cutter tip portion and is used for connecting to an inner cutter rod assembly.

[0015] The utility model also provides a medical milling tool, comprising:

[0016] The medical milling cutter head described above;

[0017] outer knife barrel assembly; and

[0018] The inner tool rod assembly is rotatably inserted into the outer tool tube assembly. One end of the inner tool rod assembly is connected to the medical milling cutter head, and the other end of the inner tool rod assembly is connected to the driving mechanism.

[0019] In one embodiment, the inner knife rod assembly is provided with a flexible section, and the outer knife tube assembly is provided with a curved section, and the flexible section is correspondingly provided through the curved section.

[0020] In one embodiment, the medical milling tool further includes a limiting structure, which connects the medical milling cutter head and the outer cutter tube assembly to prevent the medical milling cutter head from moving into the outer cutter tube assembly.

[0021] In one embodiment, the medical milling tool further comprises:

[0022] a handle body, the outer blade tube assembly being fixed to the handle body; and

[0023] A rotating shaft assembly is rotatably arranged on the handle body and is transmission-connected to the inner knife rod assembly. The inner knife rod assembly is connected to the driving mechanism through the rotating shaft assembly.

[0024] The utility model also provides a medical milling cutter, comprising:

[0025] The medical milling tool described above; and

[0026] A power handle is provided with a driving mechanism, and is connected to the inner knife rod assembly through the driving mechanism.

[0027] The medical milling cutter head in the technical solution of the present invention includes a cutter head section, a blade portion and a tip portion. The cutter head section is the main part of the milling cutter head, which is used to support the blade portion and the tip portion; the tip portion is located at one end of the cutter head section, and the blade portion is relatively sharp, which is convenient for drilling into bone tissue, thereby realizing the drilling function; the blade portion is arranged on the outer wall of the cutter head section and extends along the axial direction of the cutter head section, thereby reducing the processing difficulty of the blade portion. When the cutter head section rotates at high speed, the straight-line extending blade portion follows the high-speed rotation of the cutter head section, and can perform both milling and grinding, so that the medical milling cutter head in this solution has milling, drilling and grinding functions at the same time, thereby expanding the functions of the medical milling cutter head and can be more flexibly applied in more surgical scenarios, reducing the possibility of replacing the cutter head during surgery, shortening the operation time and improving the safety of the operation. On the other hand, compared with the spiral blade, the straight-line extending blade is less likely to vibrate during cutting, which improves cutting efficiency. The straight-line extending blade is also convenient for sharpening, ensuring the sharpness of the blade and extending the service life of the medical milling head. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the partial structure of the medical milling tool of this utility model Figure 1 ;

[0030] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0031] Figure 3 This is a schematic diagram of the partial structure of the medical milling tool of this utility model Figure 2 ;

[0032] Figure 4 This is a cross-sectional view of an embodiment of the medical milling tool of the present utility model;

[0033] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0034] Figure 6 for Figure 4 A partial enlarged view of point C in the middle;

[0035] Figure 7 This is a cross-sectional view of the outer blade tube assembly of the medical milling tool of the present utility model;

[0036] Figure 8 for Figure 7 A partial enlarged view of point D in the middle.

[0037] Description of Figure Numbers:

[0038] 100, medical milling cutter head; 110, cutter head segment; 120, blade portion; 121, third side wall; 122, fourth side wall; 130, cutter tip; 131, first side wall; 132, second side wall; 140, cutter body segment;

[0039] 200, outer knife tube assembly; 210, bending section;

[0040] 300, inner blade assembly; 310, flexible member; 320, protective sleeve;

[0041] 410, limiting member; 420, limiting groove;

[0042] 500, handle;

[0043] 600, rotating shaft assembly; 610, connecting shaft; 620, bearing.

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] The utility model provides a medical milling cutter head.

[0050] See also Figures 1 to 3 , Figure 1 This is a schematic diagram of the partial structure of the medical milling tool of this utility model Figure 1 , Figure 2 for Figure 1 The cross-sectional view at AA in the middle, Figure 3 This is a schematic diagram of the partial structure of the medical milling tool of this utility model Figure 2 .

[0051] In one embodiment of the present invention, the medical milling cutter head 100 comprises:

[0052] Cutting head section 110;

[0053] The blade portion 120 is provided on the outer wall of the blade segment 110 and extends along the axial direction of the blade segment 110; and

[0054] The blade tip 130 is disposed at one end of the blade head section 110 .

[0055] The medical milling cutter head 100 in the technical solution of the present invention includes a cutter head section 110, a blade portion 120 and a blade tip portion 130. The cutter head section 110 is the main part of the milling cutter head and is used to support the blade portion 120 and the blade tip portion 130. The blade tip portion 130 is located at one end of the cutter head section 110. The blade tip portion 130 is relatively sharp and is convenient for drilling into bone tissue to achieve a drilling function. The blade portion 120 is arranged on the outer wall of the cutter head section 110 and extends along the axial direction of the cutter head section 110, reducing The machining difficulty of the blade portion 120 is reduced. When the cutter head section 110 rotates at high speed, the straight-line extending blade portion 120 rotates at high speed with the cutter head section 110, and can perform both milling and grinding. This allows the medical milling cutter head 100 in this solution to have milling, drilling, and grinding functions at the same time, expanding the functions of the medical milling cutter head 100 and enabling more flexible application in more surgical scenarios, reducing the possibility of replacing the cutter head during surgery, shortening the surgical time, and improving the safety of the surgery. On the other hand, compared to a spiral blade, the straight-line extending blade portion 120 is less likely to vibrate during cutting, thereby improving cutting efficiency. The straight-line extending blade portion 120 is also convenient for sharpening, ensuring the sharpness of the blade portion 120 and extending the service life of the medical milling cutter head 100.

[0056] In one embodiment, the blade tip portion 130 has two inclined first side walls 131 and two oppositely arranged second side walls 132. The two first side walls 131 intersect at one end of the blade tip portion 130 away from the blade head segment 110, and the distance between the two second side walls 132 is less than the thickness of the blade head segment 110.

[0057] Reference Figure 1 and Figure 3 In the embodiment of the present invention, the blade tip is in the shape of a triangular prism, with two obliquely arranged first sidewalls 131 intersecting each other. This makes the blade tip 130 of the medical milling cutter head 100 sharper, making it easier to penetrate bone tissue, thereby improving the drilling performance of the medical milling cutter head 100. The spacing between the two second sidewalls 132 is less than the thickness of the cutter head section 110, resulting in a smaller area of the two first sidewalls 131. This reduces the contact area between the first sidewalls 131 and the bone tissue during the milling process, increasing the pressure exerted by the blade tip 130 on the bone tissue under the same pressure, thereby improving the milling efficiency of the blade tip 130.

[0058] In one embodiment, the blade portion 120 is tilted, and the tilting direction of the blade portion 120 is the same as the rotation direction of the blade head segment 110 .

[0059] Reference Figure 2In an embodiment of the present invention, the blade portion of the blade portion 120 extends obliquely in a direction away from the axis of the blade head segment 110. The inclination direction of the blade portion 120 is the rotation direction of the blade head segment 110. For example, when facing the tip portion 130, if the blade portion 120 is inclined in a counterclockwise direction, then the rotation direction of the blade head should also be counterclockwise. The inclined blade portion 120 ensures the sharpness of the blade portion 120 and can withstand greater stress when cutting bone tissue, thereby enhancing the milling and grinding performance of the blade portion 120. Specifically in this embodiment, the blade root where the blade portion 120 is connected to the outer wall of the blade head segment 110 is larger in volume, so that the blade portion 120 is firmly connected to the blade head segment 110. The blade portion 120 has a third side wall 121 and a fourth side wall 122. The third side wall 121 is perpendicular to the outer wall of the blade head segment 110, and the fourth side wall 122 is at an acute angle to the third side wall 121.

[0060] In one embodiment, the outer wall of the cutter head segment 110 is provided with a plurality of blade portions 120 , the plurality of blade portions 120 are arranged at intervals and the inclination direction of each blade portion 120 is the same as the rotation direction of the cutter head segment 110 ; and / or,

[0061] The blade head section 110 is prism-shaped and has a plurality of side edges, and each side edge is correspondingly provided with a blade portion 120 .

[0062] Reference Figure 2 In an embodiment of the present invention, multiple blade portions 120 are spaced apart on the outer wall of the cutter head section 110, and each blade portion 120 has the same inclination direction, which is clockwise or counterclockwise, so that the multiple blade portions 120 are subjected to more uniform force during the processing of bone tissue, reducing the possibility of tool jamming or damage to the blade portion 120, and making the medical milling cutter head 100 easier to manufacture.

[0063] Reference Figure 2 In the embodiment of the present invention, the cutter head segment 110 is prismatic, having side edges parallel to its axis. The blade portion 120 is disposed at the side edges, allowing the blade portion 120 to better withstand pressure and shear forces during the milling process, thereby improving milling efficiency and extending the service life of the blade portion 120. Specifically, in this embodiment, the cutter head segment 110 is in the shape of a regular quadrangular prism, having four side edges, each of which is provided with a blade portion. This simplifies the structure and reduces the difficulty of machining the blade portion 120.

[0064] In one embodiment, the medical milling cutter head 100 further includes a cutter body segment 140 . The cutter body segment 140 is disposed at an end of the cutter head segment 110 away from the cutter tip 130 and is used to connect to the inner cutter rod assembly 300 .

[0065] Combine Figure 4 and Figure 6In an embodiment of the present invention, the medical milling cutter head 100 further includes a cutter body segment 140, which is connected to the inner cutter bar assembly 300 of the medical milling cutter tool via the cutter body segment 140. This connection can be achieved through various methods, such as welding or clamping. The blade portion 120 and the blade tip portion 130 are both provided on the cutter head segment 110. Directly connecting the cutter head segment 110 and the inner cutter bar assembly 300 is difficult to operate and prone to accidental injury. However, the provision of the cutter body segment 140 simplifies the assembly difficulty of the medical milling cutter head 100 and the inner cutter bar assembly 300, reduces the possibility of accidental injury during assembly, and improves manufacturing safety.

[0066] The utility model also provides a medical milling tool, comprising:

[0067] The medical milling cutter head 100 described above;

[0068] Outer knife tube assembly 200; and

[0069] The inner tool rod assembly 300 is rotatably disposed in the outer tool tube assembly 200 . One end of the inner tool rod assembly 300 is connected to the medical milling cutter head 100 , and the other end of the inner tool rod assembly 300 is connected to the driving mechanism.

[0070] Reference Figure 4 The specific structure of the medical milling cutter head 100 refers to the above-mentioned embodiments. Since the present medical milling cutter adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. Among them, the inner tool rod assembly 300 is rotatably arranged in the outer tool tube assembly 200, and the inner tool rod assembly 300 is connected to the power handle and the medical milling cutter head 100. The inner tool rod assembly 300 rotates with the power handle and drives the medical milling cutter head 100 to rotate, so that the medical milling cutter head 100 can perform milling, drilling and other operations on bone tissue. The inner tool rod assembly 300 rotates in the outer tool tube assembly 200, and the outer tool tube assembly 200 supports and protects the inner tool rod assembly 300, thereby improving the stability and safety during the milling process.

[0071] In one embodiment, the inner blade rod assembly 300 is provided with a flexible section, and the outer blade tube assembly 200 is provided with a curved section 210 , and the flexible section is correspondingly provided through the curved section 210 .

[0072] Reference Figure 4 and Figure 5In an embodiment of the present invention, the outer blade tube assembly 200 is provided with a curved section 210. This not only provides more surgical operating angles, allowing the medical milling tool to be suitable for surgical sites with complex angles, but also provides the user with a more convenient surgical field of view, thereby improving surgical precision and safety. The inner blade rod assembly 300 is provided with a flexible section. This flexible section allows the inner blade rod assembly 300 to bend at any angle. When the inner blade rod assembly 300 is inserted into the outer blade tube assembly 200, the flexible section is inserted into the curved section 210, allowing the inner blade rod assembly 300 to rotate within the outer blade tube assembly 200.

[0073] Specifically in this embodiment, the inner tool rod assembly 300 is of flexible design as a whole, so that the same inner tool rod assembly 300 can be applied to outer tool tube assemblies 200 with different bending positions and different bending angles, thereby broadening the adaptability of the inner tool rod assembly 300 and improving the interchangeability of medical milling tools. Figure 5 The inner tool rod assembly 300 includes a flexible part 310 and a protective sleeve 320. The flexible part 310 can be made of metal wire, such as steel wire or copper wire, which not only ensures the flexibility of the inner tool rod assembly 300, but also makes the inner tool rod assembly 300 have a certain strength, reducing the possibility of the inner tool rod assembly 300 breaking during rotation. The protective sleeve 320 is mounted on the outside of the flexible part 310 to protect the flexible part 310. On the one hand, it avoids direct friction between the flexible part 310 and the inner wall of the outer knife tube assembly 200, reduces the possibility of breakage of the flexible part 310, and extends the service life of the flexible part 310. On the other hand, even if the flexible part 310 breaks, the broken flexible part 310 is wrapped inside the protective sleeve 320 to avoid the inner tool rod assembly 300 from breaking and causing the medical milling cutter head 100 to fall into the surgical site, thereby improving the safety of the operation. On the other hand, the protective sleeve 320 is made of wear-resistant and self-lubricating materials, such as polyvinyl fluoride, polyvinylidene fluoride, etc., to reduce the friction between the inner tool rod assembly 300 and the inner wall of the outer knife tube assembly 200 during rotation, thereby reducing the heat generated during the milling process.

[0074] In one embodiment, the medical milling tool further includes a limiting structure, which connects the medical milling tool head 100 and the outer tool tube assembly 200 to prevent the medical milling tool head 100 from moving into the outer tool tube assembly 200 .

[0075] In the embodiment of the present invention, when milling bone tissue, the bone tissue will generate a reaction force on the medical milling cutter head 100. The setting of the limiting structure can prevent the medical milling cutter head 100 from moving toward the inside of the outer knife tube assembly 200, thereby preventing the flexible section of the inner knife rod assembly 300 from being compressed under the action of the above reaction force, thereby avoiding the problem of the medical milling cutter head 100 being retracted into the inside of the outer knife tube assembly 200, and ensuring smooth milling of bone tissue. Specifically in this embodiment, refer to Figures 6 to 8 The limiting structure includes a limiting member 410 and a limiting groove 420. The limiting member 410 is sleeved on the outside of the blade body section 140 and welded and fixed. The limiting groove 420 is provided at the end of the outer blade tube assembly 200 facing the blade tip 130. The limiting member 410 is accommodated in the interior of the limiting groove 420 and the outer diameter of the limiting member 410 is greater than the inner diameter of the outer blade tube assembly 200, so that the limiting member 410 cannot enter the outer blade tube assembly 200, thereby blocking the medical milling cutter head 100 from moving toward the inside of the outer blade tube assembly 200. The structure is simple, easy to implement, and low cost.

[0076] In one embodiment, the medical milling tool further comprises:

[0077] A handle body 500, to which the outer blade tube assembly 200 is fixed; and

[0078] The rotating shaft assembly 600 is rotatably mounted on the handle body 500 and is transmission-connected to the inner knife bar assembly 300 . The inner knife bar assembly 300 is connected to the driving mechanism via the rotating shaft assembly 600 .

[0079] Reference Figure 4 In an embodiment of the present invention, the medical milling tool also includes a handle body 500 and a rotating shaft assembly 600. The outer knife tube assembly 200 is fixed to the handle body 500, and the rotating shaft assembly 600 is rotatably arranged inside the handle body 500. The handle body 500 supports and protects the rotating shaft assembly 600, and the rotating shaft assembly 600 plays a role in transmitting and connecting the power handle and the inner knife rod assembly 300. Specifically, in this embodiment, the rotating shaft assembly 600 includes a connecting shaft 610 and a bearing 620. The bearing 620 is sleeved on the outside of the connecting shaft 610 and is arranged inside the handle body 500. One end of the connecting shaft 610 is provided with a joint for connecting the power handle, and the other end of the rotating shaft assembly 600 is provided with a slot. The flexible part 310 of the inner knife rod assembly 300 is inserted into the inside of the slot and welded and fixed. By setting the connecting shaft 610, the connection between the medical milling tool and the power handle is facilitated, and the difficulty of disassembly and assembly of the medical milling tool is reduced.

[0080] The utility model also provides a medical milling cutter, comprising:

[0081] The medical milling tool described above; and

[0082] The power handle is provided with a driving mechanism, which drives and connects the inner knife rod assembly 300.

[0083] The specific structure of the medical milling cutter refers to the above embodiments. Since the medical milling cutter adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0084] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A medical milling cutter head, characterized in that: include: Cutting head section; A blade portion, provided on the outer wall of the cutter head segment and extending along the axial direction of the cutter head segment; as well as The blade tip is arranged at one end of the blade head section.

2. The medical milling cutter head according to claim 1, wherein: The blade tip portion has two inclined first side walls and two oppositely arranged second side walls, the two first side walls intersect at one end of the blade tip portion away from the blade head segment, and the distance between the two second side walls is less than the thickness of the blade head segment.

3. The medical milling cutter head according to claim 1, wherein: The blade portion is arranged tilted, and the tilting direction of the blade portion is the same as the rotation direction of the cutter head segment.

4. The medical milling cutter head according to claim 3, wherein: The outer wall of the cutter head segment is provided with a plurality of the cutting edge portions, the plurality of the cutting edge portions are arranged at intervals and the inclination direction of each of the cutting edge portions is the same as the rotation direction of the cutter head segment; and / or, The blade head section is prism-shaped and has a plurality of side edges, and each side edge is correspondingly provided with a blade portion.

5. The medical milling cutter head according to claim 1, wherein: The medical milling cutter head further comprises a cutter body section, which is arranged at one end of the cutter head section away from the cutter tip portion and is used for connecting to an inner cutter rod assembly.

6. A medical milling tool, characterized in that: include: The medical milling cutter head according to any one of claims 1 to 5; Outer knife barrel assembly; as well as The inner tool rod assembly is rotatably inserted into the outer tool tube assembly. One end of the inner tool rod assembly is connected to the medical milling cutter head, and the other end of the inner tool rod assembly is connected to the driving mechanism.

7. The medical milling tool according to claim 6, wherein: The inner knife rod assembly is provided with a flexible section, and the outer knife tube assembly is provided with a curved section, and the flexible section is correspondingly penetrated through the curved section.

8. The medical milling tool according to claim 7, wherein: The medical milling tool further includes a limiting structure, which connects the medical milling cutter head and the outer cutter tube assembly to prevent the medical milling cutter head from moving into the outer cutter tube assembly.

9. The medical milling tool according to claim 6, wherein: The medical milling tool also includes: a handle body, the outer blade tube assembly being fixed to the handle body; and A rotating shaft assembly is rotatably arranged on the handle body and is transmission-connected to the inner knife rod assembly. The inner knife rod assembly is connected to the driving mechanism through the rotating shaft assembly.

10. A medical milling cutter, characterized in that: include: The medical milling tool according to any one of claims 6 to 9; as well as A power handle is provided with a driving mechanism, and is connected to the inner knife rod assembly through the driving mechanism.

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