A biopsy forceps with easy assembly and processing

Abstract

This utility model discloses a biopsy forceps with convenient assembly and processing, including a forceps head assembly, a mounting base, and a control component. The mounting base includes a base tube. The forceps head assembly includes a male forceps head and a female forceps head hinged to the distal end of the base tube, and also includes an elastic expansion member passing through the interior of the base tube. The proximal end of the elastic expansion member is connected to the distal end of the control component, and the distal end has two elastic arms that expand outwards to both sides. The distal end of one elastic arm is connected to the handle of the proximal end of the male forceps head, and the distal end of the other elastic arm is connected to the handle of the proximal end of the female forceps head. The control component controls the opening and closing state of the male and female forceps heads by controlling the reciprocating movement of the elastic expansion member along the axial direction of the mounting base. This biopsy forceps effectively reduces the total number of parts, simplifies the assembly steps, and reduces the assembly difficulty, thereby helping to improve the overall assembly and processing efficiency and achieving good economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a tissue sampling forceps that is easy to assemble and process. Background Technology

[0002] With the rapid development of minimally invasive diagnostic and treatment technologies, gastrointestinal endoscopy has become a core means of diagnosing and early intervention for digestive system diseases. Among them, disposable biopsy forceps (also known as biopsy forceps) are key instruments for obtaining pathological samples under endoscopy, and their performance directly affects the efficiency, safety, and patient comfort of biopsy procedures.

[0003] Currently, commercially available biopsy forceps typically consist of a forceps head assembly, a mounting and fixing assembly, and a control assembly. The proximal end of the forceps head assembly is usually connected to the distal end of the mounting and fixing assembly via a four-bar linkage. For example, the self-anastomosis sampling forceps disclosed in Chinese utility model patent ZL202010370946.2, the easily adjustable biopsy forceps disclosed in invention patent application ZL202011189953.9, and the biopsy tissue sampling forceps disclosed in invention patent ZL201811146573.X all use a four-bar linkage to connect the proximal end of the forceps head assembly to the distal end of the mounting and fixing assembly. The problem with this structure is that the four-bar linkage between the forceps head assembly and the mounting and fixing assembly involves many components, resulting in a complex and cumbersome assembly process. This requires a high level of operator skill and installation expertise, leading to low overall assembly efficiency and severely limiting the overall efficiency of biopsy forceps assembly and processing. Therefore, this utility model proposes a tissue sampling forceps with convenient assembly and processing to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a biopsy forceps with convenient assembly and processing. The handles at the proximal ends of the male and female forceps heads are connected to the distal end of the control component through an elastic expansion member located inside the mounting base. Compared with the traditional biopsy forceps where the proximal end of the forceps head assembly is connected to the distal end of the control component through a four-bar linkage, this invention effectively reduces the total number of parts, simplifies the assembly steps, and reduces the assembly difficulty, thereby improving the overall assembly and processing efficiency of the biopsy forceps and resulting in good economic benefits. The overall structural design is ingenious and reasonable, with high feasibility for preparation and implementation, and strong practicality.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a biopsy forceps with convenient assembly and processing, including a forceps head assembly, a mounting base, and a control component. The mounting base includes a base tube. The forceps head assembly includes a male forceps head and a female forceps head hinged to the distal end of the base tube, and also includes an elastic expansion member passing through the interior of the base tube. The proximal end of the elastic expansion member is connected to the distal end of the control component. The distal end of the elastic expansion member has two elastic arms that expand outward to both sides. The distal end of one elastic arm is connected to the handle of the proximal end of the male forceps head, and the distal end of the other elastic arm is connected to the handle of the proximal end of the female forceps head. The control component controls the opening and closing state of the male and female forceps heads by controlling the reciprocating motion of the elastic expansion member along the axial direction of the mounting base.

[0006] This utility model discloses a biopsy forceps with convenient assembly and processing. The handles at the proximal ends of the male and female forceps heads are connected to the distal end of the control component via an elastic expansion member located inside the mounting base. Compared to the traditional biopsy forceps where the proximal ends of the forceps head assembly and the distal ends of the control component are connected by a four-bar linkage, this effectively reduces the total number of parts in this biopsy forceps, simplifies the assembly steps, and reduces the assembly difficulty. This helps to improve the overall assembly and processing efficiency of this biopsy forceps, resulting in good economic benefits. The overall structural design is ingenious and reasonable, making it highly feasible to manufacture and implement, and highly practical.

[0007] The preferred technical solution is that the elastic expansion member is a folded connecting wire, and the control component includes a push-pull rod. A traction wire is connected to the proximal end of the push-pull rod, and the connecting wire, located in the middle of the proximal end, connects to the distal end of the push-pull rod. The two ends of the connecting wire at the distal end form the two elastic arms. The elastic expansion member has a clever and reasonable structural design. After the connecting wire is folded in half, its two ends naturally form elastic arms that expand outwards to both sides due to their own elasticity. This design is economical and universally applicable, ensuring the smooth preparation and implementation of the biopsy forceps of this invention.

[0008] A further preferred technical solution includes that both the proximal handle of the male forceps head and the proximal handle of the female forceps head are provided with insertion holes. The middle part of the connecting wire passes through the through hole at the distal end of the push-pull rod, and both ends of the connecting wire are bent with "Z"-shaped locking connectors. One end of the connecting wire passes through and is locked into the insertion hole at the proximal end of the male forceps head via the "Z"-shaped locking connector, and the other end passes through and is locked into the insertion hole at the proximal end of the female forceps head via the "Z"-shaped locking connector. The fixed connection method between the connecting wire and the distal end of the push-pull rod, the proximal end of the male forceps head, and the proximal end of the female forceps head is simple, which helps to further reduce the assembly and processing difficulty of the biopsy forceps of this utility model, and at the same time further improves the assembly and processing efficiency.

[0009] A further preferred technical solution is that the connecting wire forms an "8" shape with the proximal ends of the male and female clamp heads. During the process of closing the clamp assembly to cut and sample living tissue by pulling the push-pull rod and connecting wire towards the proximal end using the control component, the "8" shape formed by the connecting wire and the proximal ends of the male and female clamp heads helps reduce the elastic tension on both sides of the connecting wire after folding, thereby improving the smoothness of closing the clamp assembly to cut and sample living tissue by pulling the push-pull rod and connecting wire towards the proximal end using the control component. This allows for effective closure of the clamp assembly without requiring excessive force.

[0010] A further preferred technical solution includes an enveloping fit between the male and female pliers heads, and an interlocking fit between the proximal shank of the male pliers head and the proximal shank of the female pliers head. When the male pliers head shifts during use, the proximal shank of the male pliers head shifts accordingly, and the proximal shank of the male pliers head drives the proximal shank of the female pliers head to shift in the same direction. Consequently, the proximal shank of the female pliers head synchronously drives the female pliers head to shift in the same direction, ensuring that the male and female pliers heads self-adjust and re-engage, effectively improving the self-matching accuracy of the male and female pliers heads during sampling.

[0011] A further preferred technical solution is that the outer diameter of the distal end of the male forceps head is the same as the outer diameter of the distal end of the female forceps head, and in a mutually enclosing state, the distal ends of the male and female forceps heads combine to form a cylindrical outer surface. The cylindrical outer surface can prevent the outer surface of the forceps assembly from scratching the tissue surface and facilitates smooth passage through the endoscope channel.

[0012] A further preferred technical solution includes a male long handle on one side and a male short handle on the other side at the proximal end of the male pliers head, a female long handle on one side and a female short handle on the other side at the proximal end of the female pliers head, and arm plates on both sides at the distal end of the seat tube. Pin holes are provided on the distal ends of the arm plates, the male long handle, the male short handle, the female long handle, and the female short handle. The male and female pliers heads are rotatably mounted between the two arm plates by pins passing through the pin holes on the two arm plates, the male long handle, the male short handle, the female long handle, and the female short handle. The male short handle is fitted to the inner side of the female long handle, and the female short handle is fitted to the inner side of the male long handle. Insertion holes are provided at the proximal ends of both the male and female long handles. When the male jaws shift, the male long and short shanks shift as a whole. At the same time, the female long and short shanks shift synchronously in the same direction under the deflection driving force of the male long and short shanks. Furthermore, the female long and short shanks drive the female jaws to shift synchronously in the same direction, thereby achieving precise self-fitting between the male and female jaws.

[0013] A further preferred technical solution includes a flexible protective tube further comprising the mounting base. The base tube is coaxially fixed to the proximal end of the flexible protective tube, and the proximal end of the connecting wire and the push-pull rod both pass through the interior of the flexible protective tube. The flexible protective tube protects the proximal end of the connecting wire and the push-pull rod, effectively preventing scratches on the tissue surface caused by the node formed between the proximal end of the forceps assembly and the distal end of the control assembly, further ensuring smooth passage through the endoscope channel.

[0014] A further preferred technical solution includes a cutting edge on the distal edge of the male forceps head facing the female forceps head, and a groove on the distal edge of the female forceps head facing the male forceps head and correspondingly engaging with the cutting edge. When the male and female forceps heads are closed, the cutting edge and groove achieve linear-surface contact cutting of the tissue. When the forceps assembly is closed to sample living tissue, the cutting edge on the male forceps head and the groove on the female forceps head achieve linear-surface contact cutting of the tissue. Due to the small linear-surface contact cutting area and good cutting sharpness, it can effectively prevent large-area tearing damage to surrounding tissues during sampling, reduce the probability of bleeding, and improve sampling accuracy and safety.

[0015] A further preferred technical solution is that the cutting edge has a tapered cross-section. When the pliers assembly is closed to sample living tissue, the tapered cutting edge on the male pliers head can self-correct and enter the groove on the female pliers head due to the guiding effect of the inclined surface, which helps to further improve the self-matching accuracy of the pliers assembly when it is closed.

[0016] The advantages and beneficial effects of this utility model are as follows:

[0017] 1. This utility model provides a biopsy forceps with convenient assembly and processing. The handles at the proximal ends of the male and female forceps heads are connected to the distal end of the control component via an elastic expansion member located inside the mounting base. Compared to the traditional biopsy forceps where the proximal ends of the forceps head assembly and the distal ends of the control component are connected by a four-bar linkage, this effectively reduces the total number of parts in the biopsy forceps of this utility model, simplifies the assembly steps, and reduces the assembly difficulty. This helps to improve the overall assembly and processing efficiency of the biopsy forceps of this utility model, resulting in good economic benefits. The overall structural design is ingenious and reasonable, making it highly feasible to manufacture and implement, and highly practical.

[0018] 2. The elastic expansion member is a folded connecting wire. The control component includes a push-pull rod, with a traction wire connected to the proximal end of the push-pull rod. The connecting wire, located in the middle of the proximal end, connects to the distal end of the push-pull rod. The two ends of the connecting wire at the distal end form the two elastic arms. The elastic expansion member has a clever and reasonable structural design. After the connecting wire is folded in half, its two ends naturally form elastic arms that expand outward to both sides due to their own elasticity. It is economical and universally applicable, ensuring the smooth preparation and implementation of the biopsy forceps of this utility model.

[0019] 3. Both the proximal handles of the male and female forceps heads are provided with insertion holes. The middle part of the connecting wire passes through the through hole at the distal end of the push-pull rod, and both ends of the connecting wire are bent with "Z"-shaped locking connectors. One end of the connecting wire passes through and is locked into the insertion hole at the proximal end of the male forceps head via the "Z"-shaped locking connector, and the other end passes through and is locked into the insertion hole at the proximal end of the female forceps head via the "Z"-shaped locking connector. The fixed connection method between the connecting wire and the distal end of the push-pull rod, the proximal end of the male forceps head, and the proximal end of the female forceps head is simple, which helps to further reduce the assembly and processing difficulty of the biopsy forceps of this utility model, and at the same time further improves the assembly and processing efficiency.

[0020] 4. The connecting wire forms an "8" shape with the proximal ends of the male and female clamp heads. During the process of closing the clamp assembly to cut and sample living tissue by pulling the push-pull rod and connecting wire towards the proximal end using the control component, the "8" shape formed by the connecting wire and the proximal ends of the male and female clamp heads helps reduce the elastic tension on both sides of the connecting wire after folding. This improves the smoothness of closing the clamp assembly to cut and sample living tissue by pulling the push-pull rod and connecting wire towards the proximal end using the control component, allowing for effective closure of the clamp assembly without applying excessive force.

[0021] 5. The male and female pliers are designed for a wrap-around fit, with the proximal shank of the male pliers and the proximal shank of the female pliers interlocking. When the male pliers shift during use, the proximal shank of the male pliers shifts accordingly, and the proximal shank of the male pliers drives the proximal shank of the female pliers to shift in the same direction. Consequently, the proximal shank of the female pliers synchronously drives the female pliers to shift in the same direction, ensuring that the male and female pliers self-adjust and re-engage, effectively improving the self-matching accuracy of the male and female pliers when they are closed for sampling.

[0022] 6. The distal edge of the male forceps head has a cutting edge facing the female forceps head, and the distal edge of the female forceps head has a groove facing the male forceps head and correspondingly engaging with the cutting edge. When the male and female forceps heads are closed, the cutting edge and the groove achieve linear-surface contact cutting of the tissue. When the forceps assembly is closed to sample living tissue, the cutting edge on the male forceps head and the groove on the female forceps head achieve linear-surface contact cutting of the tissue. Due to the small linear-surface contact cutting area and good cutting sharpness, it can effectively prevent large-area tearing damage to surrounding tissues during sampling, reduce the probability of bleeding, and improve sampling accuracy and safety.

[0023] 7. The cutting edge has a tapered cross-section. When the pliers assembly is closed to sample live tissue, the tapered cutting edge on the male pliers head can self-correct and enter the groove on the female pliers head due to the guiding effect of the inclined plane, which helps to further improve the self-matching accuracy of the pliers assembly when it is closed. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of a tissue sampling forceps of this utility model that is easy to assemble and process;

[0025] Figure 2 This is a perspective view (partial cross-section) of a biopsy forceps with convenient assembly and processing according to this utility model;

[0026] Figure 3 This is a 3D view of the clamp head assembly in the closed state;

[0027] Figure 4 This is a cross-sectional view of the pliers head assembly along the axial direction;

[0028] Figure 5 yes Figure 4 A magnified view of a section at point H in the middle;

[0029] Figure 6 It is a 3D view showing the male and female pliers heads in their disassembled state;

[0030] Figure 7 This is a 3D view of the pliers head assembly;

[0031] Figure 8 It is a 3D diagram of the connecting wires.

[0032] In the diagram: 1. Male pliers head; 2. Female pliers head; 3. Pin; 4. Connecting thread; 5. Seat tube; 6. Flexible protective tube; 7. Push-pull rod; 8. Traction thread; 1-1. Male long handle; 1-2. Male short handle; 1-3. Cutting edge; 2-1. Female long handle; 2-2. Female short handle; 2-3. Groove; 4-1. "Z" snap-fit ​​connector; 5-1. Arm plate; 7-1. Through hole; A. Pin hole; B. Insertion hole. Detailed Implementation

[0033] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0034] Example

[0035] like Figures 1-8 As shown, a biopsy forceps with convenient assembly and processing includes a forceps head assembly, a mounting base, and a control assembly. The mounting base includes a base tube 5. The forceps head assembly includes a male forceps head 1 and a female forceps head 2 hinged to the distal end of the base tube 5, and also includes an elastic expansion member passing through the interior of the base tube 5. The proximal end of the elastic expansion member is connected to the distal end of the control assembly. The distal end of the elastic expansion member has two elastic arms that expand outward to both sides. The distal end of one elastic arm is connected to the handle of the proximal end of the male forceps head 1, and the distal end of the other elastic arm is connected to the handle of the proximal end of the female forceps head 2. The control assembly controls the opening and closing state of the male forceps head 1 and the female forceps head 2 by controlling the reciprocating motion of the elastic expansion member along the axial direction of the mounting base.

[0036] Preferably, the elastic expansion member is a folded connecting wire 4, and the control component includes a push-pull rod 7. A traction wire 8 is connected to the proximal end of the push-pull rod 7, and the connecting wire 4 is located at the middle of the proximal end and connected to the distal end of the push-pull rod 7. The two ends of the connecting wire 4 at the distal end form the two elastic arms. Specifically, the connecting wire 4 is a 304 stainless steel wire or other shape memory metal wire.

[0037] More preferably, both the handle of the male pliers head 1 and the handle of the female pliers head 2 are provided with insertion holes B. The middle part of the connecting wire 4 passes through the through hole 7-1 at the far end of the push-pull rod 7, and both ends of the connecting wire 4 are bent with "Z" clamps 4-1. One end of the connecting wire 4 passes through the "Z" clamp 4-1 and is clamped in the insertion hole B at the near end of the male pliers head 1, and the other end passes through the "Z" clamp 4-1 and is clamped in the insertion hole B at the near end of the female pliers head 2.

[0038] More preferably, the connecting wire 4 forms an "8" shape with the proximal end of the male pliers head 1 and the proximal end of the female pliers head 2.

[0039] More preferably, the male pliers head 1 and the female pliers head 2 are fitted together in an enveloping manner, and the shank of the male pliers head 1 and the shank of the female pliers head 2 are interlocked.

[0040] More preferably, the outer diameter of the distal end of the male pliers head 1 is the same as the outer diameter of the distal end of the female pliers head 2, and in a mutually enclosing state, the distal ends of the male pliers head 1 and the distal ends of the female pliers head 2 combine to form a cylindrical outer surface.

[0041] More preferably, the male pliers head 1 has a male long handle 1-1 on one side and a male short handle 1-2 on the other side near its proximal end; the female pliers head 2 has a female long handle 2-1 on one side and a female short handle 2-2 on the other side near its proximal end; the seat tube 5 has arm plates 5-1 on both sides near its distal end; and pin holes A are provided on the distal ends of the arm plates 5-1, the male long handle 1-1, the male short handle 1-2, the female long handle 2-1, and the female short handle 2-2. The male pliers head 1 and the female pliers head 2 are rotatably mounted between the two side arm plates 5-1 by a pin 3 that passes through the pin hole A on the two side arm plates 5-1, the male long handle 1-1, the male short handle 1-2, the female long handle 2-1, and the female short handle 2-2. The male short handle 1-2 is fitted to the inside of the female long handle 2-1, and the female short handle 2-2 is fitted to the inside of the male long handle 1-1. The insertion hole B is provided at the proximal end of the male long handle 1-1 and the proximal end of the female long handle 2-1.

[0042] More preferably, the mounting base further includes a flexible protective tube 6, with the seat tube 5 coaxially fixed to the proximal end of the flexible protective tube 6. The proximal end of the connecting wire 4 and the push-pull rod 7 both pass through and are located inside the flexible protective tube 6. Specifically, the flexible protective tube 6 can be one of a flexible tube body that can be bent, such as a spring tube or a snake-bone tube.

[0043] More preferably, the distal edge of the male pliers head 1 has a cutting edge 1-3 facing the female pliers head 2, and the distal edge of the female pliers head 2 has a groove 2-3 facing the male pliers head 1 and correspondingly engaging with the cutting edge 1-3. When the male pliers head 1 and the female pliers head 2 are closed, the cutting edge 1-3 and the groove 2-3 achieve linear-surface contact cutting of the tissue.

[0044] More preferably, the cross-section of the cutting edge 1-3 is a conical structure.

[0045] The working principle of this utility model of a tissue sampling forceps that is easy to assemble and process:

[0046] By pulling the push-pull rod 7 and connecting wire 4 proximally using the traction wire 8, most of the two elastic arms at the distal end of the connecting wire 4 gradually enter the seat tube 5 and flexible protective tube 6 until the male forceps head 1 and female forceps head 2 are closed. At this time, the cutting edges 1-3 on the male forceps head 1 are embedded in the grooves 2-3 on the female forceps head 2. Then, the flexible protective tube 6 is controlled to guide the forceps assembly through the channel inside the endoscope to the tissue location where sampling is required. By pushing the push-pull rod 7 and connecting wire 4 distally using the traction wire 8, most of the two elastic arms at the distal end of the connecting wire 4 extend out from inside the seat tube 5 and flexible protective tube 6, and the male forceps head 1 and female forceps head 2 gradually... The endoscope gradually transitions to an open state; by controlling the flexible protective tube 6, the tissue to be sampled enters the jaws between the male forceps head 1 and the female forceps head 2. The traction wire 8 pulls the push rod 7 and the connecting wire 4 proximally, causing most of the two elastic arms at the distal end of the connecting wire 4 to gradually re-enter the seat tube 5 and the flexible protective tube 6 until the male forceps head 1 and the female forceps head 2 close. At this time, the cutting edge 1-3 on the male forceps head 1 is embedded in the groove 2-3 on the female forceps head 2 and cuts off the component to be sampled. Finally, by controlling the flexible protective tube 6, the forceps assembly is pulled out through the channel inside the endoscope to the outside, completing one biopsy operation.

[0047] This utility model discloses a biopsy forceps with convenient assembly and processing. The handles at the proximal ends of the male and female forceps heads are connected to the distal end of the control component via an elastic expansion member located inside the mounting base. Compared to the traditional biopsy forceps where the proximal ends of the forceps head assembly and the distal ends of the control component are connected by a four-bar linkage, this effectively reduces the total number of parts in this biopsy forceps, simplifies the assembly steps, and reduces the assembly difficulty. This helps to improve the overall assembly and processing efficiency of this biopsy forceps, resulting in good economic benefits. The overall structural design is ingenious and reasonable, making it highly feasible to manufacture and implement, and highly practical.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A biopsy forceps with good assembly convenience, comprising a forceps head assembly, a mounting fixing seat and a control assembly, the mounting fixing seat comprises a seat tube (5), the forceps head assembly comprises a male forceps head (1) and a female forceps head (2) hingedly mounted at the distal end of the seat tube (5), characterized in that, It also includes an elastic expansion member that passes through the inside of the seat tube (5). The proximal end of the elastic expansion member is connected to the distal end of the control component. The distal end of the elastic expansion member has two elastic arms that expand outward to both sides. The distal end of one elastic arm is connected to the handle of the proximal end of the male pliers head (1), and the distal end of the other elastic arm is connected to the handle of the proximal end of the female pliers head (2). The control component controls the opening and closing state of the male pliers head (1) and the female pliers head (2) by controlling the reciprocating motion of the elastic expansion member along the axial direction of the mounting base.

2. The biopsy forceps according to claim 1, wherein The elastic expansion member is a folded connecting wire (4), the control component includes a push-pull rod (7), the proximal end of the push-pull rod (7) is connected to a traction wire (8), the middle part of the proximal end of the connecting wire (4) is connected to the distal end of the push-pull rod (7), and the two ends of the connecting wire (4) at the distal end form the two elastic arms.

3. The biopsy forceps according to claim 2, wherein Both the handle of the male pliers (1) and the handle of the female pliers (2) have insertion holes (B). The middle part of the connecting wire (4) passes through the through hole (7-1) at the far end of the push-pull rod (7). Both ends of the connecting wire (4) are bent with "Z" clips (4-1). One end of the connecting wire (4) passes through the "Z" clip (4-1) and is clipped into the insertion hole (B) at the near end of the male pliers (1), and the other end passes through the "Z" clip (4-1) and is clipped into the insertion hole (B) at the near end of the female pliers (2).

4. The biopsy forceps according to claim 3, wherein The connecting wire (4) forms an "8" shape with the proximal end of the male pliers head (1) and the proximal end of the female pliers head (2).

5. The biopsy forceps according to claim 4, wherein The male pliers head (1) and the female pliers head (2) are fitted together in an enveloping manner, and the shank of the male pliers head (1) and the shank of the female pliers head (2) are interlocked.

6. The biopsy forceps according to claim 5, wherein The outer diameter of the distal end of the male pliers (1) is the same as the outer diameter of the distal end of the female pliers (2), and in a mutually enclosing state, the distal ends of the male pliers (1) and the distal ends of the female pliers (2) combine to form a cylindrical outer surface.

7. The biopsy forceps according to claim 6, wherein The male pliers head (1) has a male long handle (1-1) on one side and a male short handle (1-2) on the other side at its proximal end. The female pliers head (2) has a female long handle (2-1) on one side and a female short handle (2-2) on the other side at its proximal end. The seat tube (5) has arm plates (5-1) on both sides at its distal end. The distal end of the arm plate (5-1), the male long handle (1-1), the male short handle (1-2), the female long handle (2-1), and the female short handle (2-2) are all provided with pin holes (A). (1) and (2) are rotatably mounted between the two arm plates (5-1) by a pin (3) passing through the pin hole (A) on the two arm plates (5-1), the male long handle (1-1), the male short handle (1-2), the female long handle (2-1), and the female short handle (2-2). The male short handle (1-2) is fitted to the inside of the female long handle (2-1), and the female short handle (2-2) is fitted to the inside of the male long handle (1-1). The proximal end of the male long handle (1-1) and the proximal end of the female long handle (2-1) are both provided with the insertion hole (B).

8. The biopsy forceps according to claim 7, wherein The mounting base also includes a flexible protective tube (6), the seat tube (5) is coaxially fixed to the proximal end of the flexible protective tube (6), and the proximal end of the connecting wire (4) and the push-pull rod (7) are both inserted inside the flexible protective tube (6).

9. The biopsy forceps according to any one of claims 1 to 8, wherein The distal edge of the male pliers (1) has a cutting edge (1-3) facing the female pliers (2), and the distal edge of the female pliers (2) has a groove (2-3) facing the male pliers (1) and correspondingly cooperating with the cutting edge (1-3). When the male pliers (1) and the female pliers (2) are closed, the cutting edge (1-3) and the groove (2-3) achieve linear-surface contact cutting of the tissue.

10. The biopsy forceps of claim 9, wherein the handle is configured to be held by a user's thumb and index finger. The cutting edge (1-3) has a tapered cross-section.

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