Biopsy needle with electrocoagulation function and biopsy apparatus

Abstract

Provided are a biopsy needle with an electrocoagulation function and a biopsy apparatus. The biopsy needle with an electrocoagulation function comprises: a housing (21), a puncture assembly (22), a cutting member (23), a first conductive member (24), and a second conductive member (25). The first conductive member (24) is fixed on the housing (21) and provided with a first elastic contact portion (241) and a second elastic contact portion (242). Part of the first elastic contact portion (241) is exposed out of the housing (21). The second elastic contact portion (242) is in elastic contact with a first conductive segment (223). The second conductive member (25) is fixed on the housing (21) and provided with a third elastic contact portion (251) and a fourth elastic contact portion (252). Part of the third elastic contact portion (251) is exposed out of the housing (21). The fourth elastic contact portion (252) is in elastic contact with a second conductive segment (233).

Description

Biopsy needle and biopsy device with electrocoagulation function

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 2023116332538, entitled “BIOPSY NEEDLE AND BIOPSY DEVICE WITH ELECTROCOAGULATION FUNCTION”, filed on November 30, 2023, the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of medical devices, and in particular to a biopsy needle and a biopsy device with an electrocoagulation function. Background Art

[0004] A biopsy device is a device used by doctors to take living samples or remove diseased tissue from a patient's body. It includes a biopsy handle and a biopsy needle locked on the biopsy handle. After the biopsy sampling is completed, the biopsy handle needs to be unlocked and separated from the biopsy needle.

[0005] Some biopsy needles are provided with electrodes for electrocoagulation and / or electrocuting. The electrodes are generally electrically connected to a circuit board in a biopsy handle via a pin assembly. The pin assembly has a complex structure and high cost. Summary of the Invention

[0006] According to various embodiments of the present application, a biopsy needle and a biopsy device with an electrocoagulation function are provided.

[0007] In a first aspect, the present application provides a biopsy needle with an electrocoagulation function, comprising:

[0008] case;

[0009] a puncture assembly, the rear end of which is inserted into and fixed in the front end of the housing;

[0010] a cutting member, mounted in the puncture assembly and capable of sliding relative to the puncture assembly;

[0011] The puncture assembly is provided with a first electrode and a first conductive segment electrically connected thereto, and the cutting member is provided with a second electrode and a second conductive segment electrically connected thereto; or the cutting member is provided with a first electrode, a second electrode, a first conductive segment electrically connected to the first electrode, and a second conductive segment electrically connected to the second electrode;

[0012] Also includes:

[0013] a first conductive member fixed to the housing and having a first elastic contact portion and a second elastic contact portion, wherein a portion of the first elastic contact portion is exposed from the housing, and the second elastic contact portion is in elastic contact with the first conductive segment;

[0014] The second conductive member is fixed on the housing and has a third elastic contact portion and a fourth elastic contact portion. A portion of the third elastic contact portion is exposed from the housing, and the fourth elastic contact portion is in elastic contact with the second conductive segment.

[0015] In one embodiment, the first conductive member has two second elastic contacts, both of which are sheet-shaped and are arranged relative to each other at a distance smaller than the outer diameter of the first conductive segment to form a clamping structure for clamping the first conductive segment; and / or the second conductive member has two fourth elastic contacts, both of which are sheet-shaped and are arranged relative to each other at a distance smaller than the outer diameter of the second conductive segment to form a clamping structure for clamping the second conductive segment.

[0016] In one embodiment, one end of the two second elastic contacts is connected by a first fixing portion, and a clamp is formed between the other ends for the first conductive segment to be snapped into; and / or one end of the two fourth elastic contacts is connected by a second fixing portion, and a clamp is formed between the other ends for the second conductive segment to be snapped into.

[0017] In one embodiment, one end of the first elastic contact portion is a free end, and the other end is connected to the first fixing portion; and / or one end of the third elastic contact portion is a free end, and the other end is connected to the second fixing portion.

[0018] In one embodiment, the first elastic contact portion is sheet-shaped, comprising a first pressure-bearing portion and a first connecting portion, one end of the first pressure-bearing portion is a free end, and the other end is connected to the first fixed portion via the first connecting portion; and / or, the third elastic contact portion is sheet-shaped, comprising a second pressure-bearing portion and a second connecting portion, one end of the second pressure-bearing portion is a free end, and the other two ends are connected to the second fixed portion via the second connecting portion.

[0019] In one embodiment, the first pressure-bearing portion and / or the second pressure-bearing portion is in the shape of an arc convex toward the side away from the second elastic contact portion; or the first pressure-bearing portion and / or the second pressure-bearing portion is in the shape of a flat plate, and an elastic component is provided between the first pressure-bearing portion and / or the second pressure-bearing portion and the shell.

[0020] In one embodiment, the first elastic contact portion, the first fixing portion and the second elastic contact portion are an integrated structure; and / or the third elastic contact portion, the second fixing portion and the fourth elastic contact portion are an integrated structure.

[0021] In one embodiment, the first fixing portion is in a sheet shape, the housing is provided with a fixing groove that matches the first fixing portion, and the first fixing portion is snapped into the fixing groove.

[0022] In one embodiment, the second fixing portion is in a sheet shape and is integrally injection-molded with the housing.

[0023] In the second aspect, a biopsy device of the present application includes a handle and the biopsy needle with electrocoagulation function. The handle is provided with a third conductive part and a fourth conductive part. When the handle and the biopsy needle are buckled together, the third conductive part is in elastic contact with the first elastic contact part, and the fourth conductive part is in elastic contact with the third elastic contact part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without any creative work.

[0025] FIG1 is a front view of a biopsy needle with an electrocoagulation function in one embodiment of the present application;

[0026] FIG2 is a cross-sectional view along line AA in FIG1 ;

[0027] FIG3 is a partial enlarged schematic diagram of point A in FIG2 ;

[0028] FIG4 is a perspective view of a first conductive member of a biopsy device according to one embodiment of the present application;

[0029] FIG5 is a partial enlarged schematic diagram of point B in FIG3 ;

[0030] FIG6 is a perspective view of a second conductive member of a biopsy device according to one embodiment of the present application;

[0031] FIG. 7 is a perspective view of a biopsy device having the biopsy needle with electrocoagulation function shown in FIG. 1 .

[0032] Reference numerals:

[0033] 11. Housing; 12. Third conductive member; 13. Fourth conductive member;

[0034] 20. Biopsy needle;

[0035] 21. Housing; 211. Support surface; 212. Fixing groove;

[0036] 22. Puncture assembly; 221. Tip; 222. Sampling slot; 223. First conductive segment;

[0037] 23. Cutting element; 231. Cutting element body; 232. Cutting edge; 233. Second conductive segment;

[0038] 24, first conductive member; 241, first elastic contact portion; 2411, first pressure-bearing portion; 2412, first connecting portion; 242, second elastic contact portion; 243, first fixing portion; 244, clamping opening;

[0039] 25, second conductive member; 251, third elastic contact portion; 2511, second pressure-bearing portion; 2512, second connecting portion; 252, fourth elastic contact portion; 253, second fixing portion; 254, clamping opening;

[0040] 26. Elastic components. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] Figure 1 is a main view of a biopsy needle with an electrocoagulation function in one of the embodiments of the present application; Figure 2 is a cross-sectional view along line AA in Figure 1; Figure 3 is a partially enlarged schematic diagram of point A in Figure 2; Figure 4 is a stereoscopic view of a first conductive part of a biopsy device in one of the embodiments of the present application; Figure 5 is a partially enlarged schematic diagram of point B in Figure 3; Figure 6 is a stereoscopic view of a second conductive part of a biopsy device in one of the embodiments of the present application.

[0048] As shown in Figures 1-6, a biopsy needle 20 in one embodiment of the present application includes a housing 21, a puncture assembly 22, a cutting member 23, a first conductive member 24, and a second conductive member 25. The housing 21, as an example, is in the shape of a bar extending axially, having a front end and a rear end. The housing 21 snaps into a slot 111 on the handle to connect the biopsy needle 20 to the handle. The puncture assembly 22 includes a puncture tube and a puncture head disposed at the end of the tube away from the housing 21. The puncture head has a tip 221, which pierces tissue with the aid of ultrasound or X-ray imaging equipment. A sampling groove 222 is provided on the wall of the puncture tube near the puncture head. The rear end of the puncture tube extends into and is fixed within the front end of the housing 21. In this embodiment, the puncture tube and / or puncture head are made of a conductive material (such as stainless steel) to form a first electrode. The rear end of the puncture assembly 22 extends into the housing 21 to form a first conductive segment 223.

[0049] The cutting element 23 is mounted within the puncture assembly 22 and can move forward and backward and rotate along the axis of the puncture assembly 22. The cutting element 23 comprises an insulated cutting element body 231 and a cutting edge 232 disposed at the front end of the cutting element body 231. The cutting element body 231 is tubular, sheet-like, or rod-shaped. The cutting edge 232 is made of a conductive material to form a second electrode. In this embodiment, the cutting element body 231 comprises a metal tube and an insulating layer covering the surface of the tube. The front end of the tube is exposed from the insulating layer and is processed into a pointed shape to form the cutting edge 232. The rear end of the tube, which extends beyond the puncture assembly 22, is exposed from the insulating layer to form the second conductive segment 233.

[0050] The first conductive member 24 is fixed to the housing 21 and includes a first elastic contact portion 241 and a second elastic contact portion 242. The first elastic contact portion 241 is partially exposed from the housing 21, and the second elastic contact portion 242 is in elastic contact with the first conductive segment 223. The second conductive member 25 is fixed to the housing 21 and includes a third elastic contact portion 251 and a fourth elastic contact portion 252. The third elastic contact portion 251 is partially exposed from the housing 21, and the fourth elastic contact portion 252 is in elastic contact with the second conductive segment 233.

[0051] In the aforementioned biopsy needle with electrocoagulation function, the second elastic contact portion 242 elastically contacts the first conductive segment 223, and the fourth elastic contact portion 252 elastically contacts the second conductive segment 233. When the handle and biopsy needle 20 are engaged, the third conductive member 12 of the handle elastically contacts the first elastic contact portion 241, and the fourth conductive member 13 of the handle elastically contacts the third elastic contact portion 251. This design utilizes the electrical conductivity, deformation, and rebound properties of the elastic contact, ensuring good contact between the conductive components while also simplifying the structure, improving versatility, and reducing manufacturing costs.

[0052] As shown in FIG4 , in one example, the first conductive member 24 has two second elastic contact portions 242 . Both second elastic contact portions 242 are sheet-shaped and are arranged relative to each other at a distance less than the outer diameter of the first conductive segment 223 to form a clamping structure for clamping the first conductive segment 223. This design makes the connection between the first conductive member 24 and the first conductive segment 223 more stable and reliable, helps reduce electrical connection failures, and improves the accuracy and efficiency of biopsy operations.

[0053] Preferably, one end of the two second elastic contacts 242 is connected by a first fixing portion 243, and the other ends thereof form a clipping opening for the first conductive segment 223 to engage. With this structure, the puncture assembly 22 is inserted through the clipping opening 244 between the lower ends of the two second elastic contacts 242, establishing an electrical connection between the puncture assembly 22 and the first conductive member 24. This design simplifies the installation process of the biopsy needle 20 and improves operational convenience.

[0054] Preferably, one end of the first elastic contact portion 241 is a free end, and the other end is connected to the first fixing portion 243. With this structure, the deformation of the first elastic contact portion 241 is increased, which helps increase the elastic force. Preferably, the first elastic contact portion 241 is sheet-shaped and includes a first pressure-bearing portion 2411 and a first connecting portion 2412. The first pressure-bearing portion 2411 is arched and convex toward the side away from the second elastic contact portion 242. One end of the first pressure-bearing portion 2411 is a free end, and the other end is connected to the first fixing portion 243 via the first connecting portion 2412. With this structure, when the first pressure-bearing portion 2411 is subjected to pressure from the third conductive member 12, the free end of the first pressure-bearing portion 2411 expands along the support surface 211 on the housing 21, the first pressure-bearing portion 2411 deforms more, and comes into close contact with the third conductive member 12. When the handle and the biopsy needle are separated, the first pressure-bearing portion 2411 returns to its original shape. As an alternative, the first pressure-bearing portion 2411 is in the shape of a flat plate, and an elastic component, such as a spring, is provided between the first pressure-bearing portion 2411 and the housing 21 .

[0055] Preferably, the first elastic contact portion 241, the first fixing portion 243 and the second elastic contact portion 242 are an integrated structure. With this structure, the first conductive member 24 can be formed by punching, which is easy to process and low in cost.

[0056] 3 and 4, the first fixing portion 243 is in the form of a sheet, and the housing 21 is provided with a fixing groove 212 that matches the first fixing portion 243. The first fixing portion 243 is snapped into the fixing groove 212. This structure eliminates the need for pins, simplifies assembly, and helps reduce costs.

[0057] As shown in Figure 6, the second conductive member 25 has two fourth elastic contacts 252. Both fourth elastic contacts 252 are sheet-shaped and arranged relative to each other at a spacing less than the outer diameter of the second conductive segment 233 to form a clamping structure for clamping the second conductive segment 233. This design makes the connection between the second conductive member 25 and the second conductive segment 233 more stable and reliable, helping to reduce electrical connection failures and improve the accuracy and efficiency of the biopsy operation. Preferably, one end of the two fourth elastic contacts 252 is connected by a second fixing portion 253, and a clamping opening 254 is formed between the other ends to allow the second conductive segment 233 to snap into place. With this structure, the cutting member 23 is inserted through the clamping opening 254 between the lower ends of the two fourth elastic contacts 252, achieving electrical connection between the cutting member 23 and the second conductive member 25. This design helps simplify the installation process of the biopsy needle 20 and improves operational convenience.

[0058] Preferably, one end of the third elastic contact portion 251 is a free end, and the other end is connected to the second fixing portion 253. With this structure, the deformation of the third elastic contact portion 251 is larger, which is conducive to increasing the elastic force.

[0059] Preferably, the third elastic contact portion 251 is sheet-shaped and includes a second pressure-bearing portion 2511 and a second connecting portion 2512. The second pressure-bearing portion 2511 is flat and located above the second fixing portion 253. An elastic component 26 is disposed between the second pressure-bearing portion 2511 and the housing 21. One end of the second pressure-bearing portion 2511 is free, and the other two ends are connected to the second fixing portion 253 via the second connecting portion 2512. As an example, the elastic component 26 is a spring mounted in a mounting hole in the housing 21, with one end extending out of the mounting hole and contacting the lower surface of the second pressure-bearing portion 2511. With this structure, when the second pressure-bearing portion 2511 is subjected to pressure from the fourth conductive member 13, the second pressure-bearing portion 2511 compresses the elastic component 26, placing the second pressure-bearing portion 2511 in close contact with the fourth conductive member 13. When the handle and biopsy needle are separated, the second pressure-bearing portion 2511 returns to its original position, ensuring good contact between the second conductive member 25 and the handle. As an alternative, the second pressure-bearing portion 2511 is in an arcuate shape that protrudes toward the side away from the fourth elastic contact portion 252 .

[0060] Preferably, the third elastic contact portion 251, the second fixing portion 253 and the fourth elastic contact portion 252 are an integral structure. The second conductive member 25 can be formed by punching, which is easy to process and low in cost.

[0061] Preferably, the second fixing portion 253 is integrally injection-molded with the housing 21. This structure eliminates the need to assemble the second conductive member 25, simplifies assembly, and contributes to lower costs.

[0062] As an alternative, the cutting member 23 is provided with two electrodes, and the puncture assembly is not provided with an electrode, that is, the cutting member 23 is provided with a first electrode, a first conductive segment 223 electrically connected to the first electrode, a second electrode and a second conductive segment 233 electrically connected to the second electrode.

[0063] As shown in FIG7 , the present application also provides a biopsy device having the biopsy needle of the above embodiment, which includes a handle and a biopsy needle 20. The handle includes a housing 11, a third conductive member 12, a fourth conductive member 13, and a circuit board (not shown) disposed within the housing 11. The third conductive member 12 and the fourth conductive member 13 are fixed to the housing 11 and electrically connected to the circuit board. A card slot 111 is provided on one side of the housing 11. When the handle and the biopsy needle are buckled together, the third conductive member 12 elastically contacts the first elastic contact portion 241, and the fourth conductive member 13 elastically contacts the third elastic contact portion 251.

[0064] During operation of the biopsy device in this embodiment, after the puncture assembly 22 pierces the tissue and reaches the target position, the cutting member 23 moves back and forth along the axis of the puncture assembly 22. At the same time, the host outputs high-frequency radio waves, and the current flows from the fourth conductive member 13 through the second conductive member 25 to the cutting member 23. When the cutting member 23 rotates forward, the cutting edge 232 contacts the human tissue attracted by the negative pressure and discharges to achieve an electrocoagulation effect. After flowing through the human tissue, the current passes through the puncture assembly 22 and returns to the handle from the first conductive member 24 and the third conductive member 12.

[0065] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present application, and all such modifications and improvements fall within the scope of protection of the present application.

Claims

1. A biopsy needle with electrocoagulation function, comprising: case; A puncture assembly, the rear end of which is inserted into and fixed in the front end of the housing; A cutting member, installed in the puncture assembly; The puncture assembly is provided with a first electrode and a first conductive segment electrically connected thereto, and the cutting member is provided with a second electrode and a second conductive segment electrically connected thereto; or the cutting member is provided with a first electrode, a second electrode, a first conductive segment electrically connected to the first electrode, and a second conductive segment electrically connected to the second electrode; It is characterized by further comprising: A first conductive member, fixed on the housing, and having a first elastic contact portion and a second elastic contact portion, wherein a portion of the first elastic contact portion is exposed from the housing, and the second elastic contact portion is in elastic contact with the first conductive segment portion; The second conductive member is fixed on the housing and has a third elastic contact portion and a fourth elastic contact portion. Part of the third elastic contact portion is exposed from the housing, and the fourth elastic contact portion is in elastic contact with the second conductive segment portion.

2. The biopsy needle with electrocoagulation function according to claim 1, characterized in that: The first conductive member has two second elastic contact portions, both of which are sheet-shaped and are arranged relative to each other at a distance smaller than the outer diameter of the first conductive segment to form a clamping structure for clamping the first conductive segment.

3. The biopsy needle with electrocoagulation function according to claim 2, characterized in that: One ends of the two second elastic contact parts are connected via the first fixing part, and a clamping opening is formed between the other ends for the first conductive segment to be clamped.

4. The biopsy needle with electrocoagulation function according to claim 3, characterized in that: One end of the first elastic contact portion is a free end, and the other end is connected to the first fixing portion.

5. The biopsy needle with electrocoagulation function according to claim 4, characterized in that: The first elastic contact portion is sheet-shaped and includes a first pressure-bearing portion and a first connecting portion. One end of the first pressure-bearing portion is a free end, and the other end is connected to the first fixing portion through the first connecting portion.

6. The biopsy needle with electrocoagulation function according to claim 5, characterized in that: The first pressure-bearing portion is in an arcuate shape that protrudes toward a side away from the second elastic contact portion.

7. The biopsy needle with electrocoagulation function according to claim 1, characterized in that: The second conductive member has two fourth elastic contact portions, both of which are sheet-shaped and are relatively arranged at a distance smaller than the outer diameter of the second conductive segment to form a clamping structure for clamping the second conductive segment.

8. The biopsy needle with electrocoagulation function according to claim 7, characterized in that: One ends of the two fourth elastic contact portions are connected via the second fixing portion, and a clamping opening is formed between the other ends for the second conductive segment portion to be clamped in.

9. The biopsy needle with electrocoagulation function according to claim 8, characterized in that: One end of the third elastic contact portion is a free end, and the other end is connected to the second fixing portion.

10. The biopsy needle with electrocoagulation function according to claim 9, characterized in that: The third elastic contact portion is in a sheet shape and includes a second pressure-bearing portion and a second connecting portion. One end of the second pressure-bearing portion is a free end, and the other two ends are connected to the second fixing portion through the second connecting portion.

11. The biopsy needle with electrocoagulation function according to claim 9, characterized in that: The second pressure-bearing portion is in the shape of a flat plate, and an elastic component is provided between the second pressure-bearing portion and the housing.

12. The biopsy needle with electrocoagulation function according to claim 1, characterized in that: The first conductive member has two second elastic contacts, both of which are sheet-shaped and are relatively arranged at a distance smaller than the outer diameter of the first conductive segment to form a clamping structure for clamping the first conductive segment. The second conductive member has two fourth elastic contacts, both of which are sheet-shaped and are relatively arranged at a distance smaller than the outer diameter of the second conductive segment to form a clamping structure for clamping the second conductive segment.

13. The biopsy needle with electrocoagulation function according to claim 12, characterized in that: One ends of the two second elastic contacts are connected by a first fixing portion, and a clamp is formed between the other ends for the first conductive segment to be inserted into. One ends of the two fourth elastic contacts are connected by a second fixing portion, and a clamp is formed between the other ends for the second conductive segment to be inserted into.

14. The biopsy needle with electrocoagulation function according to claim 13, characterized in that: One end of the first elastic contact portion is a free end, and the other end is connected to the first fixing portion; one end of the third elastic contact portion is a free end, and the other end is connected to the second fixing portion.

15. The biopsy needle with electrocoagulation function according to claim 14, characterized in that: The first elastic contact portion is sheet-shaped, and includes a first pressure-bearing portion and a first connecting portion. One end of the first pressure-bearing portion is a free end, and the other end is connected to the first fixed portion through the first connecting portion. The third elastic contact portion is sheet-shaped, and includes a second pressure-bearing portion and a second connecting portion. One end of the second pressure-bearing portion is a free end, and the other two ends are connected to the second fixed portion through the second connecting portion.

16. The biopsy needle with electrocoagulation function according to claim 15, characterized in that: At least one of the first pressure-bearing portion and the second pressure-bearing portion is in an arcuate shape that is convex toward a side away from the second elastic contact portion.

17. The biopsy needle with electrocoagulation function according to claim 15, characterized in that: At least one of the first pressure-receiving portion and the second pressure-receiving portion is in a flat plate shape, and an elastic component is provided between at least one of the first pressure-receiving portion and the second pressure-receiving portion and the housing.

18. The biopsy needle with electrocoagulation function according to any one of claims 4, 5, 6, 13, 14, 15, 16 or 17, characterized in that: The first elastic contact portion, the first fixing portion and the second elastic contact portion are an integrated structure.

19. The biopsy needle with electrocoagulation function according to any one of claims 9, 10, 11, 14, 15, 16 or 17, characterized in that: The third elastic contact portion, the second fixing portion and the fourth elastic contact portion are an integrated structure.

20. The biopsy needle with electrocoagulation function according to any one of claims 3, 4, 5, 6, 13, 14, 15, 16 or 17, characterized in that: The first fixing portion is in a sheet shape, and the housing is provided with a fixing groove matched with the first fixing portion, and the first fixing portion is inserted into the fixing groove.

21. The biopsy needle with electrocoagulation function according to any one of claims 8, 9, 10, 11, 13, 14, 15, 16 or 17, characterized in that: The second fixing portion is in a sheet shape and is integrally injection-molded with the housing.

22. A biopsy device, comprising a handle, characterized in that: It also includes a biopsy needle with an electrocoagulation function as described in any one of claims 1 to 21, wherein a third conductive member and a fourth conductive member are provided on the handle, and when the handle and the biopsy needle are buckled together, the third conductive member is in elastic contact with the first elastic contact portion, and the fourth conductive member is in elastic contact with the third elastic contact portion.

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