Endoscopic scissors

Abstract

The utility model provides endoscopic scissors, and relates to the field of endoscopic instruments. The pair of endoscopic scissors comprises a handle assembly, a sheath tube, an inhaul cable assembly, a scissor assembly and an electrode plug, the sheath tube is installed on the handle assembly, the inhaul cable assembly is arranged in the sheath tube in a penetrating mode, one end of the inhaul cable assembly is connected with the handle assembly, and the other end of the inhaul cable assembly is connected with the scissor assembly; the scissor assembly is connected with the sheath tube and can rotate; the electrode plug is installed on the handle assembly and electrically connected with the inhaul cable assembly. The handle assembly is used for driving the scissor assembly to be opened or closed through the inhaul cable assembly. The pair of endoscopic scissors can select hot cutting or cold cutting as required, and is flexible to use, wide in application range and good in tissue cutting effect.

Description

Technical Field

[0001] The utility model relates to the field of endoscopic instruments, in particular to an endoscopic scissors. Background Art

[0002] Endoscopic scissors technology refers to the scissors used in the process of medical endoscopic examination or treatment. It is mainly used to remove, peel or cut tissues or organs in the body. This technology is widely used in various endoscopic surgeries, such as gastroenteroscopy, laparoscopy, etc. Generally speaking, endoscopic scissors are composed of a head, a rod or a soft catheter and a handle. The head is a pair of blades. The force is transmitted through the operation of the handle to control the opening and closing of the head. Endoscopic scissors are suitable for a variety of endoscopic surgeries. During the operation, the doctor can choose the appropriate type and size of scissors to cut tissues, separate tissues, etc. according to the specific situation of the patient. For example, in gastrointestinal surgery, endoscopic scissors can be used to remove gastrointestinal tumors, polyps and other lesions; in biliary surgery, endoscopic scissors can be used to remove lesions such as gallbladder stones and bile duct stenosis; in urinary system surgery, endoscopic scissors can be used to remove lesions such as adrenal tumors and bladder tumors; in gynecological surgery, endoscopic scissors can be used to remove lesions such as uterine fibroids and endometriosis.

[0003] The inventors have found that the existing endoscopic scissors have at least the following disadvantages:

[0004] The endoscopic scissors of the prior art are cold-cut operations, that is, they do not provide external energy to cut tissues, and the cutting effect is poor and the scope of use is narrow. In addition, the endoscopic scissors of the prior art cannot rotate, that is, the scissor head cannot rotate relative to the sheath, and the rotation of the scissor assembly can only be controlled by the overall rotation of the handle, which is inconvenient to use and affects the operation of the operator. Utility Model Content

[0005] The utility model aims to provide an endoscopic scissors which can select hot cutting or cold cutting as required, have a wide application range and good tissue cutting effect.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides an endoscopic scissors, comprising:

[0008] A handle assembly, a sheath, a cable assembly, a scissors assembly and an electrode plug, wherein the sheath is installed on the handle assembly, the cable assembly is inserted into the sheath, one end of the cable assembly is connected to the handle assembly, and the other end of the cable assembly is connected to the scissors assembly; the scissors assembly is connected to the sheath and is rotatable; the electrode plug is installed on the handle assembly and is electrically connected to the cable assembly; the handle assembly is used to drive the scissors assembly to open or close through the cable assembly.

[0009] In an optional embodiment, the cable assembly is configured as a monofilament structure.

[0010] The cable components of the delivery system in the common endoscopic scissors on the market currently mostly use stainless steel braided wire for pushing and pulling movements. The existing stainless steel braided wire has poor perception when transmitting force. Although stainless steel braided wire is widely used due to its strong hardness, support, pushing and torque conductivity, its braided surface is easily rubbed with the spring tube, increasing the force when pushing and pulling. Therefore, the cable component of this embodiment is made of nickel-titanium alloy or stainless steel wire monofilament. Nickel-titanium alloy wire or stainless steel wire has good elasticity, which makes the spring tube have better elasticity. Because endoscopic scissors are expected to enter narrow and curved areas, this design can increase the flexibility of surgical operations and force transmission capabilities.

[0011] In an optional embodiment, the handle assembly includes a base rod and a sliding handle, the sliding handle is sleeved on the base rod, and the sliding handle and the base rod are slidably matched in the length direction of the base rod; one end of the sheath is connected to the base rod; the pull cable assembly is connected to the sliding handle; and the electrode plug is installed on the sliding handle.

[0012] Based on the above solution, the handle assembly has a simple structure and is easy to operate.

[0013] In an optional embodiment, the handle assembly further comprises a rotating body, the rotating body and the base rod are rotatably matched around a preset axis, and the rotating body and the base rod are relatively fixed in an extension direction of the preset axis; the cable assembly is passed through the rotating body, the cable assembly and the rotating body are slidably matched in an extension direction of the preset axis, and the cable assembly and the rotating body are relatively fixed in a circumferential direction of the preset axis; the cable assembly and the sliding handle are rotatably matched around the preset axis; and the extension direction of the preset axis is consistent with the length direction of the base rod.

[0014] Based on the above scheme, by moving the rotating body, the cable assembly can be driven to rotate, thereby driving the scissors assembly at the front end to rotate together through the cable assembly, so that the opening direction of the scissors assembly changes, which is more flexible to use and can adapt to the shearing of tissues in different positions. It has a wide range of uses and high operating efficiency.

[0015] In an optional embodiment, the base rod includes a connected rod body and a connecting frame, and the sliding handle is slidably matched with the rod body; the connecting frame is provided with an assembly hole and a first through hole and a second through hole connected to the assembly hole, and the sheath is connected to the connecting frame and connected to the first through hole; the rotating body is provided with a hollow area, the rotating body is embedded in the assembly hole, and the first through hole and the second through hole are both connected to the hollow area; the cable assembly is simultaneously passed through the first through hole, the hollow area and the second through hole.

[0016] Based on the above solution, the rotating body is positioned by the connecting frame, and the rotating body rotates more stably. It should be understood that anti-skid grooves can also be set on the surface of the rotating body to increase friction and prevent slipping during rotation.

[0017] In an optional embodiment, a protrusion is provided on an inner wall of the connection frame which is perpendicular to the preset axis, and the rotating body is in contact with the protrusion.

[0018] Based on the above solution, the rotating body contacts the protrusion, and the rotating body does not contact the entire inner wall of the connecting frame. The contact area is small, the friction between the rotating body and the connecting frame is small, the wear is small, and the rotation is more flexible.

[0019] In an optional embodiment, when the scissors assembly switches from an open state to a closed state, the sliding handle slides on the base rod by a distance L, and the length of the base rod is greater than L.

[0020] Based on the above solution, the length of the base rod is longer. During operation, the user can hold the base rod in the area that is not covered by the sliding handle during the sliding process. The user can deeply perceive the movement state of the scissors assembly, that is, the user can better feel the closing and opening of the scissors assembly, so as to improve the accuracy and safety of the operation.

[0021] In an optional embodiment, the scissors assembly includes two hingedly coupled wings, and one side of the cutting edge of each wing is configured as a concave structure.

[0022] Based on the above scheme, the blades of the common endoscopic scissors on the market are designed as straight planes. When cutting, the blades are easily misaligned with each other and cannot effectively cut the tissue at one time. However, this embodiment improves the design of the shear force application point, that is, one side of the blade edge of the two blades is in a concave state. When cutting, the force application point of the blade is concentrated on the blade edge. As the cable assembly is pushed and pulled, the shear force application point moves on the blade edge. This design adjusts the shape and size of the scissors to ensure that the tissue can be cut accurately and smoothly during the cutting process.

[0023] In an optional embodiment, each of the wing pieces has a connected working section and a force transmission section, the cutting edge is provided on the working section, and the force transmission section is connected to the cable assembly; the working section and the force transmission section are arranged at an angle, and the force transmission sections of the two wing pieces are bent toward the same side.

[0024] Based on the above scheme, the common endoscopic scissors on the market are mostly straight, that is, a set of scissor blades are in a horizontal overlap state. Since the operation of endoscopic scissors needs to be observed and operated through an endoscope, the field of view of the endoscope is limited, and the details of the surgical area may not be completely and clearly observed. Therefore, in order to see the scissor assembly more clearly, the wing of this embodiment is designed to be bent at a certain angle, so that more details of the endoscopic scissors cutting can be seen in the field of view of the endoscope.

[0025] In an optional embodiment, the surface of the scissors assembly is coated with a coating, and the material of the coating includes but is not limited to nickel, chromium, titanium nitride, gold or silver.

[0026] Based on the above scheme, by providing a coating on the surface of the scissor assembly, the recognition can be increased. For example, the scissor assembly is electroplated with a purple nickel-chromium coating to increase the recognition of the endoscopic scissors in the cavity. The nickel-chromium alloy can enhance the corrosion resistance, hardness and smoothness of the endoscopic scissor blades.

[0027] In an optional embodiment, the endoscopic scissors are made of materials such as tungsten steel or titanium alloy, and the relatively smooth structural design of the endoscopic scissors can reduce the risks of sharp edges and accidental tissue damage. At the same time, the surface of each component is pickled, polished and metal-plated, making the endoscopic scissors more applicable.

[0028] In an optional embodiment, the sheath tube is made of a spring tube with good permeability, and a plastic layer is provided outside the sheath tube to increase the smoothness of the outer wall of the sheath tube and reduce the friction force encountered when moving in the endoscope cavity.

[0029] The beneficial effects of the embodiments of the utility model are:

[0030] In summary, the endoscopic scissors provided in this embodiment are configured with an electrode plug, and the electrode plug is electrically connected to the cable assembly, and the cable assembly is connected to the scissors assembly. The electrode plug, the cable assembly and the scissors assembly are all conductors. When it is necessary to use hot cutting to shear tissue, the electrode plug is electrically connected to the high-frequency device, and the high-frequency device can transfer energy to the scissors assembly through the cable assembly, so that the scissors assembly is heated to achieve hot cutting of the tissue, which can better shear the tissue and improve the efficiency and success rate of the operation. The electrode plug is used selectively, that is, when it is not necessary to cut the tissue by hot cutting, the electrode plug is not electrically connected to the high-frequency device, and the tissue can be cold-cut only through the scissors assembly. The endoscopic scissors are flexible in use and can be selected as needed. They have a wide range of uses, high shearing efficiency, and high surgical success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the structure of the endoscopic scissors according to an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the exploded structure of the endoscopic scissors according to an embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the connection frame of an embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the scissors assembly and the mounting tube in the embodiment of the utility model;

[0036] Figure 5 This is a schematic diagram of the structure of the scissors assembly of an embodiment of the utility model;

[0037] Figure 6 It is a structural schematic diagram of a modified example of the scissors assembly of the embodiment of the utility model;

[0038] Figure 7 It is a structural schematic diagram of another modified example of the scissors assembly of the embodiment of the utility model.

[0039] icon:

[0040] 100-handle assembly; 110-base rod; 111-rod body; 112-connecting frame; 113-protrusion; 120-sliding handle; 130-rotating body; 140-threaded sleeve; 200-sheath tube; 210-spring tube; 220-plastic tube; 230-installing tube; 300-pull cable assembly; 400-scissors assembly; 410-wing; 411-working section; 412-force transmission section; 413-arc groove; 420-hinge shaft; 430-force transmission column; 500-electrode plug. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the prior art, the scissor blades of endoscopic scissors perform cold cutting operations when shearing tissues, cannot be adjusted according to needs, have a small scope of use, low surgical efficiency, and low surgical success rate.

[0048] In view of this, the designer provides an endoscopic scissors that can be adjusted to hot cutting or cold cutting working mode according to needs. It is flexible to use, has a wide range of uses, high surgical efficiency, and high surgical success rate.

[0049] Please combine Figure 1 and Figure 2 In this embodiment, the endoscopic scissors include a handle assembly 100, a sheath 200, a cable assembly 300, a scissors assembly 400 and an electrode plug 500. The sheath 200 is installed on the handle assembly 100, the cable assembly 300 is inserted into the sheath 200, one end of the cable assembly 300 is connected to the handle assembly 100, and the other end of the cable assembly 300 is connected to the scissors assembly 400; the scissors assembly 400 is connected to the sheath 200 and is rotatable, that is, the scissors assembly 400 is rotatably matched with the sheath 200; the electrode plug 500 is installed on the handle assembly 100 and is electrically connected to the cable assembly 300; the handle assembly 100 is used to drive the scissors assembly 400 to open or close through the cable assembly 300.

[0050] Based on the above, the working principle of the endoscopic scissors provided in this embodiment is as follows:

[0051] By configuring the electrode plug 500, the electrode plug 500 is electrically connected to the cable assembly 300, and the cable assembly 300 is connected to the scissors assembly 400. The electrode plug 500, the cable assembly 300 and the scissors assembly 400 are all conductors. When it is necessary to use hot cutting to shear tissue, the electrode plug 500 is electrically connected to the high-frequency device, and the high-frequency device can transfer energy to the scissors assembly 400 through the cable assembly 300, so that the scissors assembly 400 is heated to achieve hot cutting of the tissue, which can better shear the tissue and improve the efficiency and success rate of the operation. The electrode plug 500 is selectively used, that is, when it is not necessary to cut the tissue by hot cutting, the electrode plug 500 is not electrically connected to the high-frequency device, and the tissue can be cold cut only by the scissors assembly 400. The endoscopic scissors are flexible in use, can be selected as needed, have a wide range of uses, high shearing efficiency, and high surgical success rate.

[0052] The following embodiments illustrate the details of the endoscopic scissors provided in the present application by way of examples.

[0053] In this embodiment, the cable assembly 300 is optionally configured as a monofilament structure. The cable assembly 300 of the delivery system in the common endoscopic scissors on the market currently mostly uses stainless steel braided wire for push-pull action. The existing stainless steel braided wire has poor perception when transmitting force. Although stainless steel braided wire is widely used due to its strong hardness, support, push and torque conductivity, its braided surface is easy to rub against the spring tube 210, increasing the force when pushing and pulling. Therefore, the cable assembly 300 of this embodiment is made of nickel-titanium alloy or stainless steel wire monofilament. Nickel-titanium alloy wire or stainless steel wire has good elasticity, which makes the spring tube 210 have better elasticity. Because the endoscopic scissors are expected to enter narrow and curved parts, this design can increase the flexibility of surgical operations and the ability to transmit force.

[0054] Please combine Figure 2 In this embodiment, the handle assembly 100 optionally includes a base rod 110 and a sliding handle 120, the sliding handle 120 is sleeved on the base rod 110, and the sliding handle 120 and the base rod 110 are slidably matched in the length direction of the base rod 110; one end of the sheath tube 200 is connected to the base rod 110; the cable assembly 300 is connected to the sliding handle 120; and the electrode plug 500 is installed on the sliding handle 120. The handle assembly 100 has a simple structure and is easy to operate.

[0055] In addition, the base rod 110 can be set as a rod-shaped structure with a rectangular cross-section. Correspondingly, the sliding handle 120 has a rectangular hole. After the sliding handle 120 is sleeved on the outside of the base rod 110, the sliding handle 120 can only slide back and forth along the length direction of the base rod 110. The sliding handle 120 will not rotate relative to the base rod 110, and the sliding is more stable.

[0056] Further, for ease of operation, a pull ring is provided at the distal end of the base rod 110, that is, the end away from the patient during surgery. Similarly, two pull rings arranged symmetrically are provided on the sliding handle 120. During operation, the fingers of the user can hold the pull rings, and the force application is more stable and reliable.

[0057] Please combine Figure 1 and Figure 2 In other embodiments, the handle assembly 100 may also include a rotating body 130, the rotating body 130 and the base rod 110 are rotatably matched around a preset axis, and the rotating body 130 and the base rod 110 are relatively fixed in the extension direction of the preset axis; the cable assembly 300 is inserted into the rotating body 130, the cable assembly 300 and the rotating body 130 are slidably matched in the extension direction of the preset axis, and the cable assembly 300 and the rotating body 130 are relatively fixed in the circumferential direction of the preset axis; the cable assembly 300 and the sliding handle 120 are rotatably matched around the preset axis; the extension direction of the preset axis is consistent with the length direction of the base rod 110. By turning the rotating body 130, the cable assembly 300 can be driven to rotate together, so that the cable assembly 300 drives the front scissors assembly 400 to rotate together, so that the opening direction of the scissors assembly 400 changes, and the use is more flexible, suitable for the shearing of tissues in different positions, with a wide range of uses and high operating efficiency.

[0058] It should be understood that in order to realize the rotation of the cable assembly 300, the cable assembly 300 and the sliding handle 120 are rotatably matched, that is, the sliding handle 120 can not only drive the cable assembly to pull the scissors assembly 400 to open and close by sliding, but the cable assembly 300 can also rotate relative to the sliding handle 120 under the drive of the rotating body 130. In other words, the cable assembly 300 and the sliding handle 120 are rotatably matched, and the two are relatively fixed in the length direction of the cable assembly 300. For example, a slot can be provided in the sliding handle 120, a bearing is provided in the slot, and the end of the cable assembly 300 is inserted into the bearing. Alternatively, a first annular protrusion is provided in the slot, a second annular protrusion is provided on the cable assembly 300, the cable assembly 300 is inserted into the slot, the second annular protrusion is located between the first annular protrusion and the bottom wall of the slot, and the cable assembly 300 is prevented from escaping from the slot, and the cable assembly 300 can rotate in the slot.

[0059] Please combine Figure 2 and Figure 3Further, the base rod 110 includes a connected rod body 111 and a connecting frame 112, and the sliding handle 120 is slidably matched with the rod body 111; the connecting frame 112 is provided with an assembly hole and a first through hole and a second through hole connected to the assembly hole, and the sheath tube 200 is connected to the connecting frame 112 and connected to the first through hole; the rotating body 130 is provided with a hollow area, and the hollow area can be a rectangular hole, and the cross section of the part of the cable assembly 300 can be rectangular, and the part of the cable assembly 300 with a rectangular cross section is inserted into the rectangular hole, and the cable assembly 300 can slide relative to the rotating body 130, but cannot rotate relative to the rotating body 130. At the same time, the rotating body 130 is embedded in the assembly hole, and the first through hole and the second through hole are both connected to the hollow area; the cable assembly 300 is simultaneously inserted into the first through hole, the hollow area, and the second through hole. The rotating body 130 is positioned by the connecting frame 112, and the rotation of the rotating body 130 is more stable. It should be understood that anti-skid grooves may be provided on the surface of the rotating body 130 to increase the friction force and prevent slipping during rotation.

[0060] It should be understood that the rod body 111 and the connection frame 112 can be connected by a buckle structure, which is convenient for disassembly and assembly. The sheath tube 200 can be fixed on the connection frame 112 by a threaded sleeve 140, and the connection structure is simple and reliable. Alternatively, the sheath tube 200 can be directly fixed on the connection frame 112.

[0061] Furthermore, a protrusion 113 is provided on the inner wall of the connection frame 112 which is perpendicular to the preset axis, and the rotating body 130 contacts the protrusion 113. With such a design, the rotating body 130 contacts the protrusion 113, and the rotating body 130 does not contact the entire inner wall of the connection frame 112, the contact area is small, the friction between the rotating body 130 and the connection frame 112 is small, the wear is small, and the rotation is more flexible. Specifically, the connection frame 112 has two inner walls in a direction perpendicular to the preset axis, and each inner wall is provided with two symmetrically arranged protrusions 113, and the surface of the protrusion 113 is an arc surface, which contacts the rotating body 130, further reducing the contact area, thereby reducing the friction between the rotating body 130 and the connection frame 112.

[0062] In this embodiment, optionally, when the scissor assembly 400 switches from the open state to the closed state, the sliding distance of the sliding handle 120 on the base rod 110 is L, and the length of the base rod 110 is greater than L. The base rod 110 is relatively long, and during operation, the user can hold the base rod 110 in an area not covered by the sliding handle 120, and the user can deeply perceive the movement state of the scissor assembly 400, that is, the user can better feel the closing and opening of the scissor assembly 400, so as to improve the accuracy and safety of the operation.

[0063] Please combine Figure 4-Figure 6In this embodiment, optionally, the scissors assembly 400 includes two hinged wings 410, and the outer side of each wing 410 opposite to the cutting edge is set to a concave structure. The wings 410 of the common endoscopic scissors on the market are designed as a straight plane. When shearing, the wings 410 are easily misaligned with each other and cannot effectively cut the tissue at one time. However, this embodiment improves the design of the shear force application point, that is, one side of the cutting edge of the two wings 410 is in a concave state. When shearing, the force application point of the wing 410 is concentrated on the cutting edge of the blade. As the cable assembly 300 is pushed and pulled, the shear force application point moves on the cutting edge of the blade. Such a design adjusts the shape and size of the scissors to ensure that the tissue can be cut accurately and smoothly during the shearing process.

[0064] It should be understood that the outer side of the fin 410 may be crescent-shaped.

[0065] Please combine Figure 7 Furthermore, each wing 410 has a connected working section 411 and a force transmission section 412, the cutting edge is provided on the working section 411, and the force transmission section 412 is connected to the cable assembly 300; a plate surface of the working section 411 and a plate surface of the force transmission section 412 are arranged at an angle, and the two wing pieces 410 are bent toward the same side, for example, Figure 7 With the viewing angle as a reference, the working section 411 is bent upward at a set angle relative to the connecting section. Currently, most of the common endoscopic scissors on the market are straight, that is, a set of scissor blades are in a horizontal overlap state. Since the operation of endoscopic scissors needs to be observed and operated through an endoscope, the field of view of the endoscope is limited, and the details of the surgical area may not be completely and clearly observed. Therefore, in order to see the scissor assembly 400 more clearly, the wing 410 of this embodiment is designed to be bent at a certain angle, so that more details of the endoscopic scissors cutting can be seen in the field of view of the endoscope.

[0066] It should be understood that the angle between the working section 411 and the force transmission section 412 may be 8-12°. For example, the angle between the working section 411 and the force transmission section 412 may be 8°, 10°, or 12°.

[0067] Furthermore, the surface of the scissor assembly 400 is coated with a coating, and the material of the coating includes but is not limited to nickel, chromium, titanium nitride, gold or silver. By providing a coating on the surface of the scissor assembly 400, the recognition can be increased. For example, the scissor assembly 400 is electroplated with a purple nickel-chromium coating to increase the recognition of the endoscopic scissors in the cavity. The nickel-chromium alloy can enhance the corrosion resistance, hardness and smoothness of the endoscopic scissor blade.

[0068] It should be noted that endoscopic scissors are made of materials such as tungsten steel or titanium alloy, and the surface of the endoscopic scissors adopts a relatively smooth structural design, which can reduce the risk of sharp edges and accidental tissue damage. At the same time, the surface of each component is pickled, polished and metal-plated, making the endoscopic scissors more applicable.

[0069] It should be noted that the sheath tube 200 includes a spring tube 210 and an external plastic tube 220 , and the plastic tube 220 can increase the smoothness of the outer wall of the sheath tube 200 and reduce the friction force when the sheath tube 200 moves in the endoscope cavity. The plastic tube 220 can bend together with the spring tube 210 .

[0070] In addition, the sheath tube 200 also includes a mounting tube 230 at the head end, which is fixedly connected to the plastic tube 220. The mounting tube 230 has a relatively high hardness. The hinge shafts 420 of the two winglets 410 are mounted on the mounting tube 230. When the winglets 410 rotate around the hinge shafts 420, the mounting tube 230 is not easily deformed, and plays a supporting role. That is to say, when in use, the rod body 111 is held, the sheath tube 200 and the rod body 111 remain stationary, and force is applied to the sliding handle 120. The sliding handle 120 drives the force transmission column 430 to move through the cable assembly 300, and the two winglets 410 are driven to rotate relative to the mounting tube 230 through the force transmission column 430 to achieve closing and opening. In addition, an arc groove 413 is provided on the force transmission section 412 of the winglet 410, and the same force transmission column 430 is inserted into the arc grooves 413 of the two winglets 410, and the cable assembly 300 is connected to the force transmission column 430. The cable assembly 300 pulls the force transmission column 430 , and the force transmission column 430 can slide in the two arc-shaped grooves 413 , thereby driving the two wing pieces 410 to rotate relative to each other, so as to realize the opening or closing of the two wing pieces 410 .

[0071] The endoscopic scissors provided in this embodiment can be adjusted to hot cutting or cold cutting mode according to needs, have a wide range of uses, are flexible to use, and are conducive to surgical operations.

[0072] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An endoscopic scissors, characterized in that: include: A handle assembly (100), a sheath tube (200), a cable assembly (300), a scissors assembly (400) and an electrode plug (500), wherein the sheath tube (200) is mounted on the handle assembly (100), the cable assembly (300) is inserted into the sheath tube (200), one end of the cable assembly (300) is connected to the handle assembly (100), and the other end of the cable assembly (300) is connected to the scissors assembly (400); the scissors assembly (400) is connected to the sheath tube (200) and is rotatable; the electrode plug (500) is mounted on the handle assembly (100) and is electrically connected to the cable assembly (300); the handle assembly (100) is used to drive the scissors assembly (400) to open or close through the cable assembly (300).

2. The endoscopic scissors according to claim 1, characterized in that: The cable assembly (300) is configured as a monofilament structure.

3. The endoscopic scissors according to claim 1, characterized in that: The handle assembly (100) comprises a base rod (110) and a sliding handle (120), wherein the sliding handle (120) is sleeved on the base rod (110), and the sliding handle (120) and the base rod (110) are slidably matched in the length direction of the base rod (110); one end of the sheath tube (200) is connected to the base rod (110); the pull cable assembly (300) is connected to the sliding handle (120); and the electrode plug (500) is installed on the sliding handle (120).

4. The endoscopic scissors according to claim 3, characterized in that: The handle assembly (100) further comprises a rotating body (130), wherein the rotating body (130) and the base rod (110) are rotatably matched around a preset axis, and the rotating body (130) and the base rod (110) are relatively fixed in the extension direction of the preset axis; the cable assembly (300) is inserted into the rotating body (130), wherein the cable assembly (300) and the rotating body (130) are slidably matched in the extension direction of the preset axis, and the cable assembly (300) and the rotating body (130) are relatively fixed in the circumferential direction of the preset axis; the cable assembly (300) and the sliding handle (120) are rotatably matched around the preset axis; and the extension direction of the preset axis is consistent with the length direction of the base rod (110).

5. The endoscopic scissors according to claim 4, characterized in that: The base rod (110) includes a connected rod body (111) and a connecting frame (112), and the sliding handle (120) is slidably matched with the rod body (111); the connecting frame (112) is provided with an assembly hole and a first through hole and a second through hole connected to the assembly hole, and the sheath tube (200) is connected to the connecting frame (112) and connected to the first through hole; the rotating body (130) is provided with a hollow area, and the rotating body (130) is embedded in the assembly hole, and the first through hole and the second through hole are both connected to the hollow area; the cable assembly (300) is simultaneously penetrated into the first through hole, the hollow area, and the second through hole.

6. The endoscopic scissors according to claim 5, characterized in that: A protrusion (113) is provided on an inner wall of the connection frame (112) which is perpendicular to the preset axis, and the rotating body (130) is in contact with the protrusion (113).

7. The endoscopic scissors according to claim 3, characterized in that: When the scissor assembly (400) switches from an open state to a closed state, the sliding handle (120) slides on the base rod (110) by a distance L, and the length of the base rod (110) is greater than L.

8. The endoscopic scissors according to claim 1, characterized in that: The scissors assembly (400) comprises two hingedly matched wings (410), and one side of the cutting edge of each wing (410) is arranged as a concave structure.

9. The endoscopic scissors according to claim 8, characterized in that: Each of the wing pieces (410) has a connected working section (411) and a force transmission section (412); the cutting edge is provided on the working section (411), and the force transmission section (412) is connected to the cable assembly (300); the working section (411) and the force transmission section (412) are arranged at an angle, and the force transmission sections (412) of the two wing pieces (410) are bent toward the same side.

10. The endoscopic scissors according to any one of claims 1 to 9, characterized in that: The surface of the scissors assembly (400) is coated with a coating.

Images