Multifunctional digestive endoscopy scissors

Abstract

The utility model relates to a pair of multifunctional digestive endoscopic scissors, belongs to the technical field of medical instruments, and solves the problem that the existing endoscopic scissors are easy to slip to cause incomplete shearing when performing shearing operation. The pair of multifunctional digestive endoscopy scissors comprises a single-edge blade and a double-edge blade, wherein the single-edge blade is provided with a linear edge; the double-edge blade comprises a first tooth-shaped edge and a second tooth-shaped edge; the first tooth-shaped cutting edge and the second tooth-shaped cutting edge are arranged in parallel and are the same in shape; a gap is reserved between the first tooth-shaped cutting edge and the second tooth-shaped cutting edge; when the single-edge blade and the double-edge blade move relatively, the single-edge blade can be clamped into a gap between the first tooth-shaped cutting edge and the second tooth-shaped cutting edge, and then the shearing action is achieved. The pair of multifunctional digestive endoscopy scissors can achieve shearing operation on suture lines or supports, and can prevent a target from sliding in the axial direction or the radial direction in the shearing process.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a multifunctional digestive endoscopy scissors. Background Technology

[0002] With the innovative development of endoscopic instruments, the field of digestive endoscopy has made rapid progress, and a series of digestive endoscopic techniques have been applied and promoted in clinical practice. In practice, the requirements for endoscopic scissors are increasingly stringent. Traditional suture scissors suffer multiple losses of cutting force along their transmission path, resulting in low cutting efficiency. This makes what should be a simple cutting action extremely strenuous, often failing to completely cut the suture in one go, unnecessarily prolonging the operation time and affecting the efficiency and safety of endoscopic surgery.

[0003] Currently, endoscopic surgical scissors are designed with straight blades. When handling smooth and hard tissues or objects, insufficient friction can cause the cutting target to slip, making it difficult to achieve stable and precise cutting operations. Meanwhile, the use of plastic and metal stents under endoscopy requires precise stent cutting based on specific clinical conditions. Clinically, there is a lack of multifunctional scissors capable of precisely and efficiently cutting sutures, plastic stents, and metal stents.

[0004] Therefore, there is a need to provide a multifunctional digestive endoscopy scissor that can further improve the cutting performance of digestive endoscopy scissors. Utility Model Content

[0005] Based on the above analysis, the present invention aims to provide a multifunctional digestive endoscopy scissor to solve the problems of existing endoscopy scissors having low cutting force and being prone to slippage of the cutting target during the cutting process, leading to cutting failure.

[0006] The objective of this utility model is mainly achieved through the following technical solutions:

[0007] A multifunctional digestive endoscopy scissors, comprising: a single-edged blade and a double-edged blade;

[0008] The single-edged blade has a straight cutting edge;

[0009] The double-edged blade includes: a first toothed cutting edge and a second toothed cutting edge;

[0010] The first toothed blade and the second toothed blade are arranged side by side and have the same shape; a gap is left between the first toothed blade and the second toothed blade.

[0011] The single-edged blade and the double-edged blade are hinged together, or the single-edged blade and the double-edged blade are slidably mounted relative to each other; when the single-edged blade and the double-edged blade rotate or move relative to each other, the single-edged blade can be inserted into the gap between the first toothed blade and the second toothed blade, thereby realizing the shearing action.

[0012] Furthermore, the first toothed blade includes multiple sets of first convex blade portions and first concave blade portions arranged at intervals; the first convex blade portion is a semi-circular convex blade, and the first concave blade portion is a semi-circular concave blade.

[0013] Alternatively, the first toothed blade may include a plurality of second convex blades arranged in an array; the second convex blades are triangular convex blades, and the gap between two adjacent triangular convex blades forms a second concave blade.

[0014] Alternatively, the first toothed blade may include a plurality of third convex blades arranged in an array; the third convex blades are arc-shaped convex blades, and the gap between two adjacent arc-shaped convex blades forms a third concave blade.

[0015] Furthermore, when the single-edged blade and the double-edged blade are slidably mounted relative to each other, the single-edged blade is arranged parallel to the double-edged blade; the multifunctional digestive endoscopy scissors also include: a blade holder, an inner push rod, and an outer sleeve; the single-edged blade is fixedly mounted on one end of the inner push rod; the blade holder is perpendicular to the double-edged blade, and the double-edged blade is fixedly mounted on one end of the outer sleeve via the blade holder; the inner push rod is slidably mounted inside the outer sleeve, and when the inner push rod slides relative to the outer sleeve, the single-edged blade can be engaged in the gap between the first toothed blade and the second toothed blade.

[0016] Furthermore, it also includes: a positioning bracket, a cam pressure block, a pressing handle, and a gripping handle; the positioning bracket is fixedly installed at the other end of the outer tube; the gripping handle is fixedly installed on the positioning bracket; the pressing handle and the cam pressure block are fixedly connected or are an integral structure, and the two are hinged to the positioning bracket via a hinge shaft; the other end of the inner push rod contacts the cam pressure block; when the pressing handle moves toward the gripping handle, it can drive the cam pressure block to rotate in the opposite direction; when the cam pressure block rotates, it can push the inner push rod to move downward relative to the outer tube, thereby the inner push rod can drive the single-edged blade to move toward the double-edged blade.

[0017] Furthermore, the end of the inner push rod that contacts the cam pressure block is provided with a convex circular structure, which is hemispherical or spherical.

[0018] Furthermore, the side of the cam pressure block is provided with a cam arc surface, which is in extrusive contact with the convex circular structure.

[0019] Furthermore, the positioning bracket is a rectangular bracket; the outer sleeve is fixedly connected to the positioning bracket, and the internal through hole of the outer sleeve communicates with the inner surface of the positioning bracket; a return spring is sleeved on the outside of the inner push rod, and the return spring is disposed between the convex structure and the positioning bracket.

[0020] Furthermore, one end of the convex structure contacts the cam pressure block, and the other end is provided with a limiting convex ring; the limiting convex ring is used to limit the return spring, one end of the return spring abuts against the inner surface of the positioning bracket, and the other end abuts against the side of the limiting convex ring.

[0021] The technical solution of this utility model can achieve at least one of the following effects:

[0022] 1. The multifunctional digestive endoscopy scissors of this utility model are equipped with a single-edged blade with a straight cutting edge and a double-edged blade with a double-layered toothed cutting edge. Through the cooperation of the single-edged blade and the double-edged blade, when cutting the target, the double-edged blade can simultaneously apply a cutting force perpendicular to the target object (line / plastic rod) through the double-layered cutting edge. This can effectively prevent the scissors from slipping along the axis of the target object during the cutting process, thereby avoiding problems such as cutting failure or incomplete cutting caused by scissor slippage.

[0023] 2. The multifunctional digestive endoscopy scissors of this utility model, by setting both blades of the double-edged blade to be toothed, allows the target object to be wedged into the gap between two adjacent convex parts of the toothed blade during the cutting operation, thereby preventing the target object from sliding along the blade direction and causing cutting failure; or, by setting the toothed blade, the scissor blade and the target object can be limited, preventing the scissors from sliding along the radial direction of the target object, thereby ensuring the stability and effectiveness of the cutting process.

[0024] 3. The multifunctional digestive endoscopy scissors of this utility model are equipped with a pressing handle that drives the cam pressure block to rotate, thereby pressing down the convex structure at the end of the inner push rod through the cam pressure block, while simultaneously compressing the return spring. When the convex structure moves down, it can drive the inner push rod and its end single-edged blade to move down, and the single-edged blade moves towards the direction of the double-edged blade, thereby enabling the cutting of the target object located at the position of the double-edged blade. During the cutting process, pressure is applied through the pressing handle, and the pressing force is transmitted to the convex structure through the cam pressure block. This utility model promotes the effective transmission of cutting force (downward pressure) by replacing the rotational torque of traditional scissors with the downward thrust of the inner push rod, thereby improving the cutting effect.

[0025] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0026] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0027] Figure 1 This is a schematic diagram of the blade assembly of the multifunctional digestive endoscopy scissors of this utility model.

[0028] Figure 2 One of the schematic diagrams showing the structural composition of the first toothed cutting edge of a double-edged blade;

[0029] Figure 3 The second schematic diagram shows the structural composition of the first toothed cutting edge of a double-edged blade.

[0030] Figure 4 The third schematic diagram of the structural composition of the first toothed cutting edge of a double-edged blade;

[0031] Figure 5 This is a schematic diagram of the structure of a multifunctional digestive endoscopy scissors according to the present invention;

[0032] Figure 6 for Figure 5 A magnified view of the force application mechanism of the multifunctional digestive endoscope scissors in the image;

[0033] Figure 7 for Figure 5 A schematic diagram illustrating the working principle of the force application mechanism in the multifunctional digestive endoscope scissors.

[0034] Figure 8 This is a schematic diagram of the initial state of the blade assembly of a multifunctional digestive endoscopy scissors according to the present invention.

[0035] Figure 9 This is a schematic diagram of the cutting state of the blade assembly of a multifunctional digestive endoscopy scissors according to the present invention.

[0036] Figure label:

[0037] 1-Single-edged blade; 2-Double-edged blade; 3-Tool holder; 4-Inner push rod; 5-Outer sleeve; 6-Return spring; 7-Convex structure; 8-Positioning bracket; 9-Cam pressure block; 10-Press handle; 11-Holding handle; 12-Hinge shaft; 13-Limiting convex ring;

[0038] 21-First toothed cutting edge; 22-Second toothed cutting edge;

[0039] 211-First convex cutting edge; 212-First concave cutting edge; 213-Second convex cutting edge; 214-Third convex cutting edge. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0041] Example 1

[0042] A specific embodiment of this utility model discloses a multifunctional digestive endoscopy scissors, such as... Figure 1 As shown, it includes: a single-edged blade 1 and a double-edged blade 2; the single-edged blade 1 has a straight cutting edge; the double-edged blade 2 includes: a first toothed cutting edge 21 and a second toothed cutting edge 22; the first toothed cutting edge 21 and the second toothed cutting edge 22 are arranged side by side and have the same shape; a gap is left between the first toothed cutting edge 21 and the second toothed cutting edge 22; when the single-edged blade 1 and the double-edged blade 2 rotate relative to each other, the single-edged blade 1 can be inserted into the gap between the first toothed cutting edge 21 and the second toothed cutting edge 22, thereby realizing a cutting action.

[0043] In this embodiment, by setting a double-edged blade 2 with double-layered toothed blades, when cutting the target, the double-layered blades simultaneously apply a shearing force perpendicular to the target object (line / support) to the target object. This can effectively prevent the scissors from slipping along the axis of the target object during the cutting process. In other words, it can prevent the target from sliding perpendicular to the blade direction during cutting, thereby avoiding problems such as cutting failure or incomplete cutting caused by scissor slippage.

[0044] In this embodiment, the single-edged blade 1 and the double-edged blade 2 are hinged together.

[0045] In this embodiment, the toothed cutting edge of the double-edged blade 2 has at least the following three structural forms:

[0046] The first type, such as Figure 2 As shown, the first toothed blade 21 includes multiple sets of first convex blade portions 211 and first concave blade portions 212 spaced apart; the first convex blade portion 211 is a semi-circular convex blade, and the first concave blade portion 212 is a semi-circular concave blade. In use, the target to be cut is inserted into the semi-circular concave blade, which can restrict its sliding along the blade direction, thereby preventing the cutting operation from failing.

[0047] The second type, such as Figure 3 As shown, the first toothed blade 21 includes a plurality of second convex blade portions 213 arranged in an array; the second convex blade portion 213 is a triangular convex blade, and the gap between two adjacent triangular convex blade portions forms a second concave blade portion. Figure 3 As shown, a triangular concave edge is formed between two adjacent triangular convex edges. During implementation, the target to be cut is inserted into the triangular concave edge, which can restrict its sliding along the blade direction and thus prevent the cutting operation from failing.

[0048] The third type, such as Figure 4 As shown, the first toothed blade 21 includes a plurality of arrayed third convex blade portions 214; the third convex blade portion 214 is an arc-shaped convex blade, and the gap between two adjacent arc-shaped convex blade portions forms a third concave blade portion. Figure 4 As shown, a γ-shaped concave edge is formed between two adjacent arc-shaped convex edges. During implementation, the target to be cut is inserted into the γ-shaped concave edge, which can restrict the sliding of the target along the blade direction and thus prevent the cutting operation from failing.

[0049] In this embodiment, the single-edged blade 1 and the double-edged blade 2 are hinged together and can be combined with existing digestive endoscopy scissors, which drive the single-edged blade 1 and the double-edged blade 2 to rotate relative to each other.

[0050] In the field of digestive endoscopy scissors, the technology of using a drive mechanism to achieve relative rotation and shearing action of two hinged blades is already disclosed. The single-edged blade 1 and double-edged blade 2 of this embodiment can be used in conjunction with traditional endoscopic scissors. In this embodiment, only the blade structure of the existing digestive endoscopy scissors is improved. By setting the first toothed cutting edge 21 and the second toothed cutting edge 22 of the double-edged blade 2, the problems of shearing failure and incomplete shearing caused by the axial or radial sliding of the target being sheared (thread, plastic support, metal support, etc.) relative to the scissor blade can be solved.

[0051] Example 2

[0052] The multifunctional digestive endoscopy scissors in this embodiment are an improved design based on Embodiment 1:

[0053] Considering that existing endoscopic scissors (traditional wire scissors) mostly use a pull wire to drive a lever mechanism to rotate the scissor blades to achieve the cutting operation, when dealing with tissues or items with smooth surfaces and high hardness, the cutting target is prone to slippage due to insufficient friction, making it difficult to achieve a stable and precise cutting operation.

[0054] In this embodiment, the single-edged blade 1 and the double-edged blade 2 are slidably mounted relative to each other, with the single-edged blade 1 arranged parallel to the double-edged blade 2. The shearing action is achieved through the relative movement of the single-edged blade 1 and the double-edged blade 2.

[0055] In this embodiment, as Figure 5 As shown, the multifunctional digestive endoscopy scissors also include: a blade 3, an inner push rod 4, and an outer tube 5. Preferably, the inner push rod 4 adopts a flexible guide wire structure, a metal rod, or a plastic rod; the outer tube 5 adopts a flexible metal tube or a plastic tube.

[0056] Specifically, the single-edged blade 1 is fixedly installed at one end of the inner push rod 4; when the inner push rod 4 is displaced, it can drive the single-edged blade 1 to move synchronously.

[0057] Specifically, the blade shank 3 is perpendicular to the double-edged blade 2, and the double-edged blade 2 is fixedly mounted on one end of the outer sleeve 5 via the blade shank 3; for example... Figure 8 As shown, the tool holder 3 is located on the side of the double-edged blade 2, and a U-shaped annular groove is formed between the double-edged blade 2, the tool holder 3 and the outer sleeve 5.

[0058] Specifically, the inner push rod 4 is slidably installed inside the outer sleeve 5, and when the inner push rod 4 slides relative to the outer sleeve 5, the single-edged blade 1 can be engaged in the gap between the first toothed blade 21 and the second toothed blade 22.

[0059] In use, the target material to be cut, such as thread, plastic, or metal, is hooked into the U-shaped annular groove. The concave edge of the double-edged blade 2 restricts the slippage of the target. Further displacement of the inner push rod 4 causes the single-edged blade 1 to move towards the double-edged blade 2, thereby achieving the cutting action. Figure 9 As shown.

[0060] In this embodiment, by replacing the rotational shearing of traditional endoscopic wire cutters with relative displacement shearing (guillotine type), when cutting the target, the double-edged blades can simultaneously apply a shearing force perpendicular to the target object (wire / support) through the double-edged blades. This effectively prevents the shears from slipping along the axis of the target object during the cutting process, avoiding problems such as cutting failure or incomplete cutting due to shear slippage. Furthermore, the inner push rod 4 directly applies a pushing force to the single-edged blade 1, which can significantly increase the shearing force between the single-edged blade 1 and the double-edged blade 2, enhancing the shearing effect. It can not only cut wires, but also cut plastic supports / metal supports.

[0061] Furthermore, in order to facilitate the displacement of the inner push rod 4 and enhance the effect of applying thrust to the single-edged blade 1, this embodiment also includes a push rod assembly for pushing the inner push rod 4 to move.

[0062] like Figure 6As shown, the push rod assembly includes: a positioning bracket 8, a cam pressure block 9, a pressing handle 10, and a gripping handle 11; the positioning bracket 8 is fixedly installed on the other end of the outer tube 5; the gripping handle 11 is fixedly installed on the positioning bracket 8; the other end of the inner push rod 4 contacts the cam pressure block 9; the pressing handle 10 and the cam pressure block 9 are fixedly connected or are an integral structure, and the two are hinged to the positioning bracket 8 through a hinge shaft 12; when the pressing handle 10 moves towards the gripping handle 11, it can drive the cam pressure block 9 to rotate in the opposite direction; when the cam pressure block 9 rotates, it can push the inner push rod 4 to move downward relative to the outer tube 5, thereby the inner push rod 4 can drive the single-edged blade 1 to move towards the double-edged blade 2.

[0063] like Figure 6 , Figure 7 As shown, the end of the inner push rod 4 that contacts the cam pressure block 9 is provided with a convex circular structure 7; preferably, the convex circular structure 7 is hemispherical or spherical.

[0064] Furthermore, such as Figure 7 As shown, the cam pressure block 9 has a cam arc surface on its side, which presses against the convex circular structure 7 at the end of the inner push rod 4. When the cam pressure block 9 rotates, the distance between the contact point between the cam arc surface and the surface of the convex circular structure 7 and the hinge shaft 12 gradually increases. As a result, the cam pressure block 9 can push the convex circular structure 7 away from the hinge shaft 12. In other words, the cam pressure block 9 can press down on the convex circular structure 7 to make it move towards the outer sleeve 5, ultimately driving the single-edged blade 1 at the end of the inner push rod 4 to move towards the double-edged blade 2.

[0065] During implementation, the surgeon presses down the pressing handle 10 to rotate it toward the grip handle 11 (this can be achieved with one hand). When the pressing handle 10 rotates, it drives the cam pressing block 9 to rotate relative to the positioning bracket 8. As a result, the cam arc surface of the cam pressing block 9 continuously presses down on the convex circular structure 7, and pushes the inner push rod 4 and the single-edged blade 1 downward through the convex circular structure 7, thereby achieving the displacement of the single-edged blade 1 toward the double-edged blade 2 and realizing rapid shearing of the target.

[0066] Furthermore, the positioning bracket 8 is a rectangular bracket; one end of the positioning bracket 8 is fixedly connected to the outer sleeve 5, and the internal through hole of the outer sleeve 5 communicates with the inner surface of the positioning bracket 8; the other end of the positioning bracket 8 is rotatably mounted with the cam pressure block 9 and the pressing handle 10 through the hinge shaft 12.

[0067] Furthermore, in order to separate the single-edged blade 1 and the double-edged blade 2 when no shearing operation is performed, a return spring 6 is sleeved on the outside of the inner push rod 4, and the return spring 6 is disposed between the convex structure 7 and the positioning bracket 8.

[0068] Specifically, such as Figure 7 As shown, one end of the convex circular structure 7 contacts the cam pressure block 9, and the other end is provided with a limiting convex ring 13; the limiting convex ring 13 is used to limit the return spring 6, one end of the return spring 6 abuts against the inner surface of the positioning bracket 8, and the other end abuts against the side of the limiting convex ring 13. Specifically, the convex circular structure 7, the limiting convex ring 13, the inner push rod 4, and the single-edged blade 1 are all fixed as one piece.

[0069] In this embodiment, when the pressing handle 10 drives the cam block 9 to press down the convex structure 7, the return spring 6 is compressed; after the pressing handle 10 is released, the convex structure 7, the limiting convex ring 13, the inner push rod 4 and the single-edged blade 1 can be reset by the return spring 6.

[0070] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multifunctional digestive endoscopy scissors, characterized in that, include: Single-edged blade (1) and double-edged blade (2); The single-edged blade (1) has a straight cutting edge; The double-edged blade (2) includes: a first toothed blade (21) and a second toothed blade (22); The first toothed blade (21) and the second toothed blade (22) are arranged side by side and have the same shape; there is a gap between the first toothed blade (21) and the second toothed blade (22); The single-edged blade (1) and the double-edged blade (2) are hinged together, or the single-edged blade (1) and the double-edged blade (2) are slidably mounted relative to each other; when the single-edged blade (1) and the double-edged blade (2) rotate or move relative to each other, the single-edged blade (1) can be inserted into the gap between the first toothed blade (21) and the second toothed blade (22), thereby realizing the shearing action.

2. The multifunctional digestive endoscopy scissors according to claim 1, characterized in that, The first toothed blade (21) includes multiple sets of first convex blade portions (211) and first concave blade portions (212) spaced apart; the first convex blade portion (211) is a semi-circular convex blade, and the first concave blade portion (212) is a semi-circular concave blade.

3. The multifunctional digestive endoscopy scissors according to claim 1, characterized in that, The first toothed blade (21) includes a plurality of second convex blades (213) arranged in an array; the second convex blades (213) are triangular convex blades, and the gap between two adjacent triangular convex blades forms a second concave blade.

4. The multifunctional digestive endoscopy scissors according to claim 1, characterized in that, The first toothed blade (21) includes multiple arrayed third convex blades (214); the third convex blades (214) are arc-shaped convex blades, and the gap between two adjacent arc-shaped convex blades forms a third concave blade.

5. The multifunctional digestive endoscopy scissors according to any one of claims 1-4, characterized in that, When the single-edged blade (1) and the double-edged blade (2) are slidably installed relative to each other, the single-edged blade (1) is set parallel to the double-edged blade (2); the multifunctional digestive endoscopy scissors also include: a blade bar (3), an inner push rod (4) and an outer tube (5); the single-edged blade (1) is fixedly installed at one end of the inner push rod (4); the blade bar (3) is perpendicular to the double-edged blade (2), and the double-edged blade (2) is fixedly installed at one end of the outer tube (5) through the blade bar (3); the inner push rod (4) is slidably installed inside the outer tube (5), and when the inner push rod (4) slides relative to the outer tube (5), the single-edged blade (1) can be inserted into the gap between the first toothed blade (21) and the second toothed blade (22).

6. The multifunctional digestive endoscopy scissors according to claim 5, characterized in that, Also includes: Positioning bracket (8), cam pressure block (9), pressing handle (10), and grip handle (11); the positioning bracket (8) is fixedly installed on the other end of the outer tube (5); the grip handle (11) is fixedly installed on the positioning bracket (8); the pressing handle (10) is fixedly connected to the cam pressure block (9) or is an integral structure, and the two are hinged on the positioning bracket (8) through a hinge shaft (12); the other end of the inner push rod (4) is in contact with the cam pressure block (9); when the pressing handle (10) moves toward the grip handle (11), it can drive the cam pressure block (9) to rotate in the opposite direction; when the cam pressure block (9) rotates, it can push the inner push rod (4) to move downward relative to the outer tube (5), and then the inner push rod (4) can drive the single-edged blade (1) to move toward the double-edged blade (2).

7. The multifunctional digestive endoscopy scissors according to claim 6, characterized in that, The inner push rod (4) has a convex circular structure (7) at one end that contacts the cam pressure block (9). The convex circular structure (7) is hemispherical or spherical.

8. The multifunctional digestive endoscopy scissors according to claim 7, characterized in that, The cam pressure block (9) has a cam arc surface on its side, and the cam arc surface is in contact with the convex circular structure (7) by compression.

9. The multifunctional digestive endoscopy scissors according to claim 8, characterized in that, The positioning bracket (8) is a rectangular bracket; the outer tube (5) is fixedly connected to the positioning bracket (8), and the internal through hole of the outer tube (5) is connected to the inner surface of the positioning bracket (8); the inner push rod (4) is sleeved with a reset spring (6), and the reset spring (6) is located between the convex structure (7) and the positioning bracket (8).

10. The multifunctional digestive endoscopy scissors according to claim 9, characterized in that, One end of the convex circular structure (7) is in contact with the cam pressure block (9), and the other end is provided with a limiting convex ring (13); the limiting convex ring (13) is used to limit the return spring (6), one end of the return spring (6) abuts against the inner surface of the positioning bracket (8), and the other end abuts against the side of the limiting convex ring (13).

Images