Medical planing tool bit, medical tool bit component and surgical planing device

Abstract

The utility model provides a medical planing tool bit, a medical tool bit component and an operation planing device, and relates to the technical field of medical instruments. The blade face of the first knife edge of the first knife head side face is the curved face, the cutting edge angle of the first knife edge is 35-50 degrees, the small-angle cutting edge angle is achieved through the curved-face-shaped blade face, the sharpness of the knife edge is improved, the tissue smashing efficiency is improved, the cutting force is reduced, and therefore the planing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a medical planing cutter head, a medical cutter head component and a surgical planing device. BACKGROUND

[0002] The surgical planing device is a commonly used medical device in existing medical treatments, such as an endoscopic surgical planing device, which can pulverize tissues in a prostate hyperplasia surgery. The planing cutter head is a key component that affects the planing efficiency of the surgical planing device. The planing cutter head in the existing surgical planing device usually includes a hollow first cutter tube and a second cutter tube arranged in the first cutter tube. The first cutter tube is provided with a cutter edge, the cutter edge is aimed at the tissues to be pulverized, the second cutter tube is rotated to cut the tissues, and the pulverized tissues are sucked out along the inside of the second cutter tube by using a suction device. With the continuous development of technology, people have higher and higher requirements for the planing efficiency of the surgical planing device. SUMMARY

[0003] The present application aims to provide a medical planing cutter head, a medical cutter head component and a surgical planing device, which can improve the tissue pulverization efficiency and thus improve the planing efficiency.

[0004] In a first aspect, the present application provides a medical planing cutter head, comprising:

[0005] The first cutter head has a first cutter edge on a side surface thereof, the cutting edge of the first cutter edge is a curved surface, and the cutting edge angle of the first cutter edge is 35°-50°.

[0006] In a possible implementation manner, the height of the cutting edge is higher at a position closer to the central axis of the first cutter head and lower at a position farther away from the central axis of the first cutter head.

[0007] In a possible implementation manner, the curved surface has a rotation center line.

[0008] In a possible implementation manner, the included angle between the rotation center line and the axis of the first cutter head body is 5°-10°.

[0009] In a possible implementation manner, the included angle between the rotation center line and the axis of the first cutter head body is 6°-8°.

[0010] In a possible implementation manner, the curved surface is a circular arc surface.

[0011] In a possible implementation manner, the radius of the circular arc surface is 1.1-2.2 times the radius of the first cutter head body.

[0012] In a possible implementation manner, the radius of the circular arc surface is 1.5-2 times the radius of the first cutter head body.

[0013] In a possible implementation manner, the method further includes the following steps.

[0014] The second cutter head is arranged inside the first cutter head, and a part of a second top end of the second cutter head exposed from the first cutting edge is less than half of the second top end.

[0015] In a second aspect, the application provides a medical cutter head component, comprising a cutter tube and the medical planing cutter head of the first aspect, and the medical planing cutter head is located at a front end of the cutter tube.

[0016] In a third aspect, the application provides a surgical planer, comprising the medical cutter head component of the second aspect.

[0017] Compared with the prior art, the application has the following advantages:

[0018] In the application, the cutting edge of the first cutting edge of the first cutter head is a curved surface, and the cutting edge angle of the first cutting edge is 35-50°. The curved surface cutting edge realizes a small cutting edge angle, improves the sharpness of the cutting edge, improves the tissue crushing efficiency, reduces the cutting force, and thus improves the planing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application, illustrate embodiments of the application, and together with the description serve to explain the principles of the application. In the drawings:

[0020] Figure 1 is a structural schematic diagram of a surgical planer provided by an embodiment of the application;

[0021] Figure 2 is a structural schematic diagram of a medical planing cutter head for comparison, wherein Figure 2 (b) is Figure 2 (a) a cross-sectional view at A-A;

[0022] Figure 3 is a three-dimensional schematic diagram of the first cutter head in the medical planing cutter head for comparison;

[0023] Figure 4 is a cutting edge angle schematic diagram of the first cutter head in the medical planing cutter head for comparison, wherein Figure 4 (b) is Figure 4 (a) a cross-sectional view at B-B;

[0024] Figure 5 is a structural schematic diagram of a medical planing cutter head provided by an embodiment of the application, wherein Figure 5 (b) is Figure 5 (a) a cross-sectional view at C-C;

[0025] Figure 6 is a perspective view of a first cutter head of a medical planing cutter head according to an embodiment of the present application;

[0026] Figure 7 is a schematic view of a cutting edge of a first cutter head of a medical planing cutter head according to an embodiment of the present application, wherein Figure 7 (b) is Figure 7 (a) is a schematic view of a cross section at D-D;

[0027] Figure 8 is a schematic view of another medical planing cutter head according to an embodiment of the present application.

[0028] In the figure: 100: cutter head component;

[0029] 200: handle;

[0030] 110, 10: planing cutter head;

[0031] 120: cutter tube;

[0032] 11, 101: first cutter head;

[0033] 12, 102: second cutter head;

[0034] 1101, 1010: first cutting edge;

[0035] 1102, 1011: blade surface;

[0036] 1012: first tip;

[0037] 1021: second tip. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar scenarios without creative labor on the basis of these drawings. Unless it is clear from the language context or otherwise indicated, the same reference numbers in the figures represent the same structures or operations.

[0039] As shown in the present application, unless the context clearly indicates otherwise, the words "one", "a", "an", and / or "the" do not mean to specify a single number, but can also include a plurality. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0040] The foregoing is considered as illustrative only of the principles of the application. Other variations and modifications can be made to the embodiments disclosed in this application without departing from the spirit or scope of the application. Therefore, it is to be understood that this application is not to be limited to the particular embodiments disclosed, but is intended to cover any and all uses of the application, including modifications, adaptations, combinations, and guides that are within the scope and spirit of the present application. In the drawings, like numerals represent similar components throughout several views.

[0041] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "horizontal", "top", "bottom", and the like are generally based on the orientation or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0042] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0043] In addition, it should be noted that the use of the terms "first", "second", etc. to describe components is merely intended to differentiate a corresponding component. Unless otherwise stated, the terms have no special meaning and should not be construed as limiting the scope of the present application. In addition, although the terms used in the present application are selected from commonly known terms, some terms mentioned in the present application may be selected by the applicant according to his or her judgment, and the detailed meanings thereof are described in the relevant part of the description. In addition, the present application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0044] It should be understood that when a component is referred to as "on", "connected to", "coupled to", or "contacting" another component, it can be directly on, connected to, coupled to, or contacting the other component, or intervening components can be present. In contrast, when a component is referred to as "directly on", "directly connected to", "directly coupled to", or "directly contacting" another component, there are no intervening components present.

[0045] Figure 1 is a structural schematic diagram of a surgical planer provided by an embodiment of the present application. As shown in Figure 1 The surgical planer includes a cutter head component 100 and a handle 200. The front end of the handle 200 has an opening, and the cutter head component 100 is installed at the front end of the handle 200 through the opening.

[0046] The cutter head component 100 includes a medical planer cutter head (hereinafter referred to as a planer cutter head) 110 and a cutter tube 120, and the planer cutter head 110 is located at the front end of the cutter tube 120. In some embodiments, the cutter tube 120 and the planer cutter head 110 are both double-layer structures, the cutter tube 120 includes a first cutter tube and a second cutter tube sleeved together, and the planer cutter head 110 includes a first cutter head and a second cutter head sleeved together, the first cutter head is connected with the first cutter tube, and the second cutter head is connected with the second cutter tube. The side surface of the first cutter head and the second cutter head both has a cutting edge through which the tissue is cut. In other embodiments, the cutter tube 120 and the planer cutter head 110 are both single-layer structures, the cutter tube 120 can be the first cutter tube or the second cutter tube in the above-mentioned double-layer structure, and correspondingly, the planer cutter head 110 can be the first cutter head or the second cutter head in the above-mentioned double-layer structure. It should be noted that the planer cutter head 110 can be a part of the cutter tube 120, or a component independent of the cutter tube 120.

[0047] The present application will be described in detail below taking the planer cutter head 110 as an example.

[0048] Please refer to Figures 2-4As a comparison, the planing cutter head 10 includes a first cutter head 11 and a second cutter head 12, and the second cutter head 12 is arranged in the first cutter head 11. The side surface of the first cutter head 11 has a first cutting edge 1101. The edge surface 1102 of the first cutting edge 1101 is a bevel plane, so that the edge angle θ1 of the first cutting edge 1101 is large, such as θ1 is 67°, the cutting edge is not sharp, and the cutting efficiency is affected.

[0049] Please refer to Figures 5-8 The planing cutter head 110 provided by the embodiment of the present application includes a first cutter head 101 and a second cutter head 102, and the second cutter head 102 is arranged in the first cutter head 101. The side surface of the first cutter head 101 has a first cutting edge 1010. The edge surface 1011 of the first cutting edge 1010 is a curved surface, which can or can not have an axis as a rotation center.

[0050] Please refer to Figure 7 As shown in the figure, on the longitudinal section of the first cutter head 101 perpendicular to the length direction, the intersection J of the edge surface 1011 and the inner wall surface S1 of the first cutter head 101 is higher than the intersection K of the edge surface 1011 and the outer wall surface S2 of the first cutter head 101, so that the edge angle of the first cutting edge 1010 can be reduced. Here, the height can be based on the tangent line L of the bottom of the outer wall surface S1. For example, the edge angle θ2 of the first cutting edge 1010 is between 35°-50°, such as 35°, 40°, 45°, 49°, 50°, etc. In the embodiment of the present application, the edge angle θ2 on each longitudinal section of the first cutter head 101 perpendicular to the length direction can be the same or different.

[0051] The embodiment of the present application reduces the edge angle of the first cutting edge 1010 by the curved edge surface 1011, improves the sharpness of the first cutting edge 1010, improves the tissue pulverization efficiency, reduces the cutting force, and thus improves the planing efficiency.

[0052] In some embodiments, the closer to the central axis X of the first cutter head 101, the higher the height of the edge surface 1011, and the farther away from the central axis X of the first cutter head 101, the lower the height of the edge surface 1011, as shown in the figure. The embodiment gradually reduces the height of the edge surface from the middle to the edge, simplifies the edge surface profile, and thus is easy to process. Similarly, the height can be based on the tangent line L of the bottom of the outer wall surface S1. Figure 5

[0053] In some embodiments, the edge surface 1011 is symmetrical about the central axis X. In other embodiments, the edge surface 1011 is not symmetrical about the central axis X.

[0054] Please refer to Figure 8 In some embodiments, the curved surface of the edge surface 1011 has an axis M as a rotation center, which is referred to as the rotation center line of the curved surface, as shown in the figure. Figure 8 ​The dotted line in the figure shows the point. In this embodiment, the curved surface of the cutting edge 1011 has a rotation center line, so the regular shape is easy to process and the cost is low.

[0055] In some embodiments, the rotation center line of the curved surface of the cutting edge 1011 is parallel to the axis N of the body of the first cutting head 101 (e.g., ...). Figure 8 The included angle β between the two points (shown by the dashed lines in the diagram) is between 5° and 10°, such as 6° to 8°, specifically 5°, 6°, 7°, 8°, 9°, 10°, etc. This embodiment improves planing efficiency by using appropriate cutting edge tilt angles and rotation centerline positions.

[0056] In some embodiments, the curved surface of the cutting edge 1011 is an arc surface with a rotation center line. The radius of this arc surface is approximately 1.1-2.2 times the radius of the first cutting head 101 body, such as 1.5-2 times, specifically 1.1 times, 1.3 times, 1.5 times, 1.7 times, 2 times, 2.2 times, etc. This embodiment improves planing efficiency by setting a suitable cutting edge radius.

[0057] Continue to refer to Figure 8 The second cutting head 102 is fitted inside the first cutting head 101, and the second tip 1021 of the second cutting head 102 can protrude from the first cutting edge 1010. The first tip 1012 of the first cutting head 101 at least partially covers the second tip 1021 of the second cutting head 102. In some embodiments, the portion of the second tip 1021 of the second cutting head 102 protruding from the first cutting edge 1010 is less than half of the second tip 1021, to increase the stability of the second cutting head 102 selected inside the first cutting head 101, thereby improving the planing efficiency. Furthermore, through the above-mentioned appropriate cutting edge inclination angle and rotation center line position, a small number of openings are left on both sides of the second cutting head 102 to meet the needs of the cutting function.

[0058] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0059] Also, the use of "a" or "an" to describe an item or feature of the application should be understood to refer to one or more of the items specified, unless otherwise indicated. As such, "a" or "an" should be understood to refer to at least one of the possible alternative. Also, the use of "another" to describe an item or feature of the application should be understood to refer to one or more of the items specified, unless otherwise indicated.

[0060] It should also be noted that, as used in the specification and the claims, the singular form "a," "an," and "the" include plural references unless the context clearly dictates otherwise. As such, the terms "comprises," "comprising," "includes," "including," and the like, are to be construed in an inclusive rather than an exclusive sense, unless otherwise indicated herein. As used herein, "and / or" means and, or, and / or.

[0061] Some embodiments use numerical ranges to describe quantities of attributes. It should be understood that such numerical ranges recited in the description of embodiments are used to help illustrate the embodiments and are not to be construed as limiting the scope of the embodiments. In some examples, such numerical ranges are used to describe the approximate amount of an attribute. In some examples, the numerical ranges are used to describe the approximate amount of an attribute using the modifier "about," "approximately," or "substantially." Unless otherwise indicated, "about," "approximately," or "substantially" means that the amount of the attribute can vary by ±20%. Accordingly, in some embodiments, numerical values used in the specification are approximations that can vary depending on the desired properties of the individual embodiments. In some embodiments, numerical values used in the specification are provided with a margin of error. Although the numerical ranges and parameters setting forth the broadest scope of the embodiments herein are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, can contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0062] While the application has been described with reference to the currently preferred embodiments, those skilled in the art will recognize that changes can be made within the spirit of the application.

Claims

1. A medical planing tool head, characterized in that Comprising: a first cutting head, a side surface of the first cutting head having a first cutting edge, a blade surface of the first cutting edge being curved, and a blade edge angle of the first cutting edge being 35°-50°.

2. The medical gouging bur head of claim 1, wherein, The higher the position is close to the central axis of the first cutting head, the higher the height of the blade surface is, and the farther the position is away from the central axis of the first cutting head, the lower the height of the blade surface is.

3. The medical gouging bur head of claim 1, wherein, The curved surface has a rotation center line.

4. The medical gouging bur head of claim 3, wherein, An included angle between the rotation center line and the axis of the first cutting head body is 5°-10°.

5. A medical gouging tool head as defined in claim 4, wherein An included angle between the rotation center line and the axis of the first cutting head body is 6°-8°.

6. A medical gouging tool head according to any one of claims 1-5, characterized in that The curved surface is a circular arc surface.

7. The medical gouging bur head of claim 6, wherein, A radius of the circular arc surface is 1.1-2.2 times of a radius of the first cutting head body.

8. The medical gouging bur head of claim 7, wherein, A radius of the circular arc surface is 1.5-2 times of a radius of the first cutting head body.

9. A medical gouging tool head according to any one of claims 1-5, characterized in that Further comprising: a second cutting head, the second cutting head being arranged inside the first cutting head, and a second top end of the second cutting head being exposed from the first cutting edge by less than half of the second top end.

10. A medical blade head member characterized by, A medical planing cutter head as claimed in any one of claims 1-9 is arranged at a front end of a cutter tube.

11. A surgical shaver characterized by, A medical cutter head assembly as claimed in claim 10 is provided.

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