CN217645259U - Rotary-cut biopsy needle tool bit structure - Google Patents
Rotary-cut biopsy needle tool bit structure Download PDFInfo
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- CN217645259U CN217645259U CN202221408699.1U CN202221408699U CN217645259U CN 217645259 U CN217645259 U CN 217645259U CN 202221408699 U CN202221408699 U CN 202221408699U CN 217645259 U CN217645259 U CN 217645259U
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Abstract
The utility model relates to a rotary-cut needle cutter technical field specifically is a rotary-cut biopsy needle cutter structure. It comprises a tool bit main body, a cutting edge and a tool tip; the tool bit main body is of a double-cone structure; a plurality of cutting edges are arranged on the tool bit main body; the outer side of the cutting edge is a cutting edge, and a plurality of cutting edge edges are converged at the front end of the cutter head main body to form a cutter point; the cutting edge consists of a curved cutting edge part and a linear cutting edge part, the curved cutting edge part is arranged at the front part of the cutting edge, and the linear cutting edge part is arranged at the rear part of the cutting edge. The beneficial effects of the technical scheme are as follows: the design of two cutting edges of circular arcs or spline curves can reduce the contact area with a patient, facilitate puncture operation in the operation process, reduce pulling on the focus part of the patient, improve operation efficiency and reduce injury to the patient.
Description
Technical Field
The utility model relates to a rotary-cut needle cutter technical field specifically is a rotary-cut biopsy needle cutter structure.
Background
The biopsy needle puncture tool bit is used for puncturing skin tissues in clinical biopsy and comprises a tool bit main body and a plurality of cutting edges, wherein the edges of the cutting edges are converged to form a tool tip. The cutting edge consists of two circular arcs or spline curves and a straight cutting edge part; in the prior art, a three-concave puncture tool bit is generally adopted, and the puncture strength of the three-concave puncture tool bit is increased along with the increase of the outer diameter. For example, a triangular blade tip with an outer diameter of 5.1mm, the processing results of different manufacturers, and the puncturing force is distributed between 3.0 and 6N, wherein the puncturing force close to 3.0N puts extremely high requirements on the process requirements of the processing and production processes. And no matter how the puncture angle and the triangular angle are adjusted in the process, the puncture force can not be reduced any more. The puncture force is large, so that the operation difficulty of a doctor is increased, tissues move under pressure in the puncture process, the tissue positioning difficulty is increased, and the operation time is prolonged.
Disclosure of Invention
The technical problem to be solved by the technical scheme is as follows: the existing rotary cutting biopsy needle head design has large puncture force when in use, and easily causes the condition of overlarge injury and pain in the sampling process of a patient.
In order to realize the purpose, the invention adopts the technical scheme that: a rotary cutting biopsy needle cutter head structure comprises a cutter head main body, a cutting edge and a cutter point; the tool bit main body is of a double-cone structure; a plurality of cutting edges are arranged on the tool bit main body; the outer side of the cutting edge is a cutting edge, and a plurality of cutting edge edges are converged at the front end of the cutter head main body to form a cutter point; the cutting edge consists of a curved cutting edge part and a linear cutting edge part, the curved cutting edge part is arranged at the front part of the cutting edge, and the linear cutting edge part is arranged at the rear part of the cutting edge.
The technical scheme has the beneficial effects that: the design of two cutting edges of the circular arc or spline curve can reduce the contact area with the patient, facilitate the puncture operation in the operation process, reduce the pulling on the focus part of the patient, improve the operation efficiency and reduce the injury to the patient.
The technical problem to be solved by the improvement of the technical scheme is as follows: further optimization of the knife edge radian and the blade face included angle is required.
In order to realize the purposes, the invention creates the technical scheme adopted after improvement: the cutter head main body is provided with two cutting edges, and the intersection angle of two curve tangents of the curve cutting edge part is 50-60 degrees; the included angle of the blade surface of the blade is 12-18 degrees.
The beneficial effect after this technical scheme improves does: the sharpness of the puncture knife tip is further improved through the two cutting edges of the arc or spline curve and the blade face included angle with a proper angle.
The technical problem to be solved by the improvement of the technical scheme is as follows: further optimization of the main cutting edge is required.
In order to realize the purposes, the invention creates the technical scheme adopted after improvement: the cutting edge that sets up on the great cone of tool bit main part is the main cutting edge, the start-stop point length and the high proportion B/A of main cutting edge are 1.9 ~ 2.
The beneficial effect after this technical scheme improves does: when the proportion of the length of the starting point and the stopping point of the main cutting edge to the height of the main cutting edge is 1.9-2, the puncture efficiency can be better improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic view of the front view structure of the present invention.
Fig. 3 is a schematic view of the structure of the right side of the present invention.
Fig. 4 is a schematic view of the top view structure of the present invention.
The character labels in the figure are 1, a tool bit main body; 2. a blade; 3. a knife tip; 201. a blade edge; 202. a curved knife edge; 203. a linear knife edge part.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1:
a rotary cutting biopsy needle cutter head structure comprises a cutter head main body 1, a cutter edge 2 and a cutter point 3; the tool bit main body 1 is of a double-cone structure; a plurality of cutting edges 2 are arranged on the tool bit main body 1; the outer side of the cutting edge 2 is provided with a cutting edge 201, and a plurality of cutting edge edges 201 are converged at the front end of the cutter head main body 1 to form a cutter tip 3; the blade edge 201 is composed of a curved blade portion 202 and a linear blade portion 203, the curved blade portion 202 is arranged in the front of the blade 2, and the linear blade portion 203 is arranged in the rear of the blade 2.
Example 2:
as a further optimization of the above embodiment: a rotary cutting biopsy needle cutter head structure comprises a cutter head main body 1, a cutter edge 2 and a cutter point 3; the tool bit main body 1 is of a double-cone structure; a plurality of cutting edges 2 are arranged on the tool bit main body 1; the outer side of the cutting edge 2 is provided with a cutting edge 201, and a plurality of cutting edge edges 201 are converged at the front end of the cutter head main body 1 to form a cutter tip 3; the blade edge 201 is composed of a curved blade portion 202 and a linear blade portion 203, the curved blade portion 202 is arranged in the front of the blade 2, and the linear blade portion 203 is arranged in the rear of the blade 2. The cutter head main body 1 is provided with two cutting edges 2, and the intersection angle of two curve tangents of the curve cutting edge part 202 is 50-60 degrees; the included angle of the edge surface of the blade 2 is 12-18 degrees.
Example 3:
as a further optimization of the above embodiment: a rotary cutting biopsy needle cutter head structure comprises a cutter head main body 1, a cutter edge 2 and a cutter point 3; the tool bit main body 1 is of a double-cone structure; a plurality of cutting edges 2 are arranged on the tool bit main body 1; the outer side of the cutting edge 2 is provided with a cutting edge 201, and a plurality of cutting edge edges 201 are converged at the front end of the cutter head main body 1 to form a cutter tip 3; the knife edge 201 is composed of a curved knife edge part 202 and a linear knife edge part 203, the curved knife edge part 202 is arranged at the front part of the knife edge 2, and the linear knife edge part 203 is arranged at the rear part of the knife edge 2. The cutting edge 2 arranged on the larger cone on the tool bit main body 1 is a main cutting edge, and the ratio B/A of the length of the starting point to the length of the stopping point of the main cutting edge to the height of the main cutting edge is 1.9-2.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the above technical features may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (3)
1. The utility model provides a rotary-cut biopsy needle tool bit structure which characterized in that: the utility model comprises a tool bit main body (1), a cutting edge (2) and a tool tip (3); the tool bit main body (1) is of a double-cone structure; a plurality of cutting edges (2) are arranged on the tool bit main body (1); the outer side of the cutting edge (2) is provided with a cutting edge (201), and a plurality of cutting edge edges (201) are converged into a cutter point (3) at the front end of the cutter head main body (1); the knife edge (201) consists of a curved knife edge part (202) and a linear knife edge part (203), the curved knife edge part (202) is arranged in the front of the knife edge (2), and the linear knife edge part (203) is arranged in the rear of the knife edge (2).
2. The rotational atherectomy biopsy needle head structure of claim 1, wherein: the tool bit main body (1) is provided with two cutting edges (2), and the intersection angle of two curve tangents of the curve cutting edge part (202) is 50-60 degrees; the included angle of the edge surface of the cutting edge (2) is 12-18 degrees.
3. The rotational atherectomy biopsy needle head structure of claim 1, wherein: the cutting edge (2) arranged on the larger cone on the cutter head main body (1) is a main cutting edge, and the B/A ratio of the length of the starting point to the dead point of the main cutting edge to the height of the main cutting edge is 1.9-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221408699.1U CN217645259U (en) | 2022-06-07 | 2022-06-07 | Rotary-cut biopsy needle tool bit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221408699.1U CN217645259U (en) | 2022-06-07 | 2022-06-07 | Rotary-cut biopsy needle tool bit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217645259U true CN217645259U (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221408699.1U Active CN217645259U (en) | 2022-06-07 | 2022-06-07 | Rotary-cut biopsy needle tool bit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217645259U (en) |
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2022
- 2022-06-07 CN CN202221408699.1U patent/CN217645259U/en active Active
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