Multifunctional therapeutic instrument under endoscope

Abstract

The embodiment of the application provides a multifunctional treatment instrument under an endoscope, and relates to the field of medical devices, which comprises a handle mechanism, a three-way pipe, a sheath pipe, a pull cable and a snare; the handle mechanism is connected with the first end of the three-way pipe, the second end of the three-way pipe is connected with the sheath pipe, and the third end of the three-way pipe is used for passing liquid or inert gas; the pull cable is arranged in the sheath pipe and the three-way pipe at the same time, one end of the pull cable is connected with the snare, and the other end is connected with the handle mechanism; the handle mechanism is used for driving the snare to move relative to the sheath pipe through the pull cable, so as to adjust the position of the snare relative to the sheath pipe, and make the instrument present different functional instruments such as a high-frequency incision knife, a soft argon electrode or a cold and hot snare. The design of the instrument can save the step of repeatedly switching accessories in the operation process, save a large amount of non-operation time, improve the operation efficiency, simplify the operation, reduce the operation failure, has strong universality, adapts to the use requirements of different scenes, and can provide better treatment for patients.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a multifunctional endoscopic treatment device. Background Technology

[0002] In current clinical practice, surgical instruments such as high-frequency incision knives, soft argon electrodes, and cryo-thermal snares are typically used independently. Frequent switching between these instruments during surgery presents numerous drawbacks. This not only significantly increases surgical time, extending the patient's time on the operating table and increasing psychological stress and physical burden, but also potentially increases patient discomfort and surgical risks. For example, the switching process may cause unnecessary irritation or damage to the patient's tissues. Furthermore, frequent instrument changes severely impact the continuity and efficiency of the surgery, disrupting the surgeon's rhythm and reducing the precision and success rate of the procedure. Utility Model Content

[0003] The purpose of this invention includes, for example, providing a multifunctional endoscopic treatment device that eliminates the need for repeated switching of accessories during surgery, saves a significant amount of non-surgical time, and improves surgical efficiency; it also simplifies operation, reduces operational errors, and is highly versatile, adapting to the needs of different scenarios and providing better treatment for patients.

[0004] The embodiments of this utility model can be implemented as follows:

[0005] In a first aspect, this utility model provides a multifunctional endoscopic treatment device, comprising:

[0006] The device comprises a handle mechanism, a T-joint, a sheath, a cable, and a snare. The handle mechanism is connected to a first end of the T-joint, a second end of the T-joint is connected to the sheath, and a third end of the T-joint is used to introduce liquid or inert gas. The cable passes through both the sheath and the T-joint, with one end connected to the snare and the other end connected to the handle mechanism. The handle mechanism is used to move the snare relative to the sheath via the cable to adjust the position of the snare relative to the sheath.

[0007] In an optional embodiment, the handle mechanism includes a guide rod and a slip ring, the slip ring being slidably engaged with the guide rod, the guide rod being connected to the sheath via the tee tube; the slip ring is connected to the cable, and the slip ring is used to drive the cable to move when sliding relative to the guide rod, so as to adjust the position of the snare relative to the sheath.

[0008] Based on the above scheme, by holding the guide rod and then sliding the slip ring, the cable can be moved, thereby causing the snare to move relative to the sheath. This operation is convenient. The slip ring is guided and positioned by the guide rod, ensuring stable and reliable sliding.

[0009] In an optional embodiment, the guide rod is provided with a first limiting part, and the slip ring is provided with a second limiting part, wherein the first limiting part and the second limiting part can be disengaged and engaged.

[0010] Based on the above scheme, during the sliding process of the slip ring, after sliding to the set position on the guide rod, it is locked by the engagement of the first limiting part and the second limiting part. The position of the slip ring relative to the guide rod is stable and reliable, and the position of the snare relative to the sheath is stable and reliable, which is conducive to carrying out corresponding operations through the snare.

[0011] In an optional embodiment, there are multiple first limiting portions, which are arranged at intervals in a preset direction. The second limiting portion is used to selectively engage with one of the multiple first limiting portions when the slip ring slides relative to the guide rod in the preset direction.

[0012] Based on the above scheme, by setting multiple first limiting parts, the second limiting part can selectively engage with one of the multiple first limiting parts, thereby ensuring that the snare can be positioned relative to the sheath tube in different working states, making it safe and reliable to use.

[0013] In an optional embodiment, one of the first limiting portion and the second limiting portion is configured as a snap-fit ​​protrusion, and the other is configured as a snap-fit ​​groove, wherein the snap-fit ​​protrusion is used to snap into the snap-fit ​​groove in a detachable manner.

[0014] Based on the above scheme, the first limiting part and the second limiting part have simple structures, are easy to process and manufacture, and fit tightly, making them difficult to loosen, thus ensuring the stable and reliable position of the snare.

[0015] In an optional embodiment, the slip ring includes an operating body, a support, and a limiting rod; the operating body is provided with a communicating assembly hole and a clearance hole, the guide rod passes through the assembly hole and slidably engages with the slip ring; the support is mounted on the operating body, the limiting rod is rotatably engaged with the support, and a second limiting part is provided on the limiting rod, the second limiting part being used to extend out of the clearance hole and engage with the first limiting part.

[0016] Based on the above scheme, when the slip ring slides to the set position, the first limiting part and the second limiting part engage. When it is necessary to continue sliding the slip ring to adjust the working state of the snare, force is applied to the limiting rod to make it rotate relative to the operating body, thereby separating the first limiting part and the second limiting part. The first limiting part and the second limiting part lose their limiting effect on the operating body and the guide rod, and the operating body can slide relative to the guide rod, making the operation convenient and flexible.

[0017] In an optional embodiment, the limiting rod includes a first rod body and a second rod body connected together, the first rod body and the second rod body are arranged at an angle, the first rod body is rotatably engaged with the operating body, the second rod body passes through the clearance hole, and the second limiting part is disposed at the end of the second rod body.

[0018] Based on the above scheme, the second rod is slidably disposed in the clearance hole, and the position of the second rod is stable and reliable, so that the first limiting part and the second limiting part are firmly and reliably matched.

[0019] In an optional embodiment, the slip ring further includes an elastic reset member, which is connected to both the operating body and the limiting rod, for causing the second limiting portion to tend to extend out of the clearance hole.

[0020] Based on the above scheme, when the slip ring slides relative to the guide rod, and the first limiting part slides to a position that engages with the second limiting part, the first limiting part automatically engages with the second limiting part under the action of the elastic reset member, and this engagement is maintained continuously, thereby preventing the first and second limiting parts from disengaging. When locking is required, simply press the limiting rod to overcome the elastic force of the elastic reset member, causing the first limiting part to move away from the second limiting part; the operation is convenient.

[0021] In an optional embodiment, the guide rod includes a rod body and a knob, the knob being rotatably engaged with the rod body, the cable passing through the knob and connected to the slip ring, the cable being slidably engaged with the knob, and the two being relatively fixed in the rotation direction of the knob.

[0022] Based on the above scheme, by applying force to the knob, the snare can be rotated, thereby adjusting the direction of the snare and facilitating the surgery.

[0023] In an optional embodiment, the outer peripheral surface of the knob is provided with an anti-slip structure.

[0024] Based on the above solution, turning the knob is less likely to slip, saving time and effort.

[0025] The beneficial effects of this utility model embodiment include, for example:

[0026] In summary, the endoscopic multifunctional treatment instrument provided in this embodiment, by applying force to the handle mechanism, can move the snare relative to the sheath via a cable. When the snare is fully extended from the distal end of the sheath, it automatically unfolds into a ring structure, enabling related surgical operations. At this time, the snare is used as a snare electrode, allowing for the removal of tissue within the area enclosed by the snare. As the length of the snare entering the sheath increases, it gradually changes from a ring structure to a strip structure. When the distal end of the snare extends approximately 1.5 mm from the distal end of the sheath, it can be used as a needle electrode. At this time, the third end of the three-way valve can be purged with saline for cleaning. When the snare continues to retract into the sheath and is fully inserted, with the distance between the distal end of the snare and the distal end of the sheath between 0.5 mm and 2.0 mm, it can be used as an argon electrode. At this time, the third end of the three-way valve can be purged with an inert gas such as argon. In this way, by adjusting the position of the snare relative to the sheath, the working state of the snare can be adjusted, so that the treatment device can be used as a snare, a needle electrode or an argon electrode, making it versatile and adaptable to the resection, hemostasis, ablation and vaporization of lesions of different sizes, thus improving the versatility and practicality of the device; and the function switching is achieved through the handle mechanism, which makes the operation convenient, time-saving and minimally invasive to the patient. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an endoscopic multifunctional therapeutic device according to an embodiment of this application;

[0029] Figure 2 This is a partial schematic diagram of an endoscopic multifunctional therapeutic device according to an embodiment of this application;

[0030] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0031] Figure 4 This is an exploded view of the handle mechanism according to an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the limiting rod according to an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of a snare device according to an embodiment of this application.

[0034] icon:

[0035] 100-Handle mechanism; 110-Guide rod; 111-Rod body; 112-Knob; 113-Mounting hole; 114-First limiting part; 1141-First groove; 1142-Second groove; 1143-Third groove; 120-Slip ring; 121-Operating body; 1211-Assembly hole; 1212-Allowing hole; 122-Support; 123-Limiting rod; 1231-First rod body; 1232-Second rod body; 124-Elastic reset element; 130-Second limiting part; 200-Tee tube; 300-Sheath tube; 400-Cable; 500-Lasso; 510-Tip; 600-Electric plug. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0042] In existing technologies, to adapt to the surgical needs of different scenarios, surgical instruments need to be changed multiple times during the same surgical procedure. This not only significantly increases surgical time, extending the time patients spend on the operating table and increasing psychological stress and physical burden, but also frequently changing instruments can increase patient pain and surgical risks. For example, the switching process may cause unnecessary irritation or damage to the patient's body tissues. Furthermore, frequent instrument changes can severely affect the continuity and efficiency of the surgery, disrupting the surgeon's rhythm and reducing the accuracy and success rate of the operation.

[0043] In view of this, the designers have provided a multifunctional endoscopic treatment instrument that integrates multiple functions, reduces the difficulty of operation, shortens the time required to change instruments, improves surgical efficiency, and increases the success rate of surgery.

[0044] Please refer to Figures 1-6 This embodiment provides a multifunctional endoscopic treatment device, which includes a handle mechanism 100, a three-way tube 200, a sheath 300, a cable 400, and a snare 500. The handle mechanism 100 is connected to the first end of the three-way tube 200, the second end of the three-way tube 200 is connected to the sheath 300, and the third end of the three-way tube 200 is used to introduce liquid or inert gas. The cable 400 passes through both the sheath 300 and the three-way tube 200. One end of the cable 400 is connected to the snare 500, and the other end is connected to the handle mechanism 100. The handle mechanism 100 is used to drive the snare 500 to move relative to the sheath 300 through the cable 400, so as to adjust the position of the snare 500 relative to the sheath 300.

[0045] As described above, the operation method of the endoscopic multifunctional treatment device provided in this embodiment is as follows:

[0046] By applying force to the handle mechanism 100, the snare 500 moves relative to the sheath 300 via the cable 400. When the snare 500 is fully extended from the distal end of the sheath 300, it unfolds into a ring structure, at which point it can be used as a snare electrode to perform operations such as tissue removal within the area enclosed by the snare 500. As the length of the snare 500 retracting into the sheath 300 increases, it gradually changes from a ring structure to a strip structure. When the distal end of the snare 500 extends approximately 1.5 mm from the distal end of the sheath 300, it can be used as a needle electrode. Physiological saline can be introduced into the third end of the three-way tube 200, flowing out from the distal end of the sheath 300 for cleaning and other procedures. When the snare 500 continues to retract into the sheath 300 and is fully inside the sheath 300, with the distance between the distal end of the snare 500 and the distal end of the sheath 300 between 0.5mm and 2.0mm, the snare 500 can be used as an argon electrode. At this time, an inert gas such as argon can be introduced into the third end of the three-way tube 200.

[0047] In this way, by adjusting the position of the snare 500 relative to the sheath 300, the working state of the snare 500 can be adjusted as needed, so that the treatment device can be used as a snare 500, a needle electrode or an argon electrode, making it versatile and adaptable to the resection, hemostasis, ablation and vaporization of lesions of different sizes, thus improving the versatility and practicality of the device; and the function switching is achieved through the handle mechanism 100, which is convenient to operate, takes little time and causes little damage to the patient.

[0048] The following embodiments illustrate the details of the endoscopic multifunctional therapeutic device of this application by way of example.

[0049] Please refer to Figures 1-6 In this embodiment, optionally, the endoscopic multifunctional therapeutic instrument includes a handle mechanism 100, a three-way tube 200, a sheath 300, a pull cable 400, a snare 500, and an electrical plug 600. The handle mechanism 100 is connected to the first end of the three-way tube 200, the second end of the three-way tube 200 is connected to the sheath 300, and the third end of the three-way tube 200 is used to introduce liquid or inert gas. The pull cable 400 passes through both the sheath 300 and the three-way tube 200, with one end connected to the snare 500 and the other end connected to the handle mechanism 100. The electrical plug 600 is mounted on the handle mechanism 100 and is electrically connected to the snare 500 via the pull cable 400. The electrical plug 600 is used to connect to the high-frequency electrical interface of the entire device, thereby providing high-frequency electricity to the snare 500. The handle mechanism 100 is used to move the snare 500 relative to the sheath 300 via the cable 400, so as to adjust the position of the snare 500 relative to the sheath 300 and thus adjust the shape of the snare 500.

[0050] It should be understood that when operating the handle mechanism 100, depending on the relative position of the snare 500 and the sheath 300, the snare 500 can be used as a snare electrode, a needle electrode, or an argon electrode.

[0051] Please refer to Figures 1-4 Optionally, the handle mechanism 100 includes a guide rod 110 and a slip ring 120. The slip ring 120 is sleeved on the guide rod 110 and can slide back and forth relative to the guide rod 110 along its length. The slip ring 120 is connected to the cable 400, and the guide rod 110 is connected to the sheath 300 through a three-way tube 200. When the slip ring 120 slides, it drives the cable 400 to move.

[0052] Specifically, the guide rod 110 includes a rod body 111 and a knob 112. The outer contour of the cross-section of the rod body 111 is approximately rectangular. A slip ring 120 is sleeved on the outside of the rod body 111. The slip ring 120 does not rotate relative to the rod body 111, and the rod body 111 guides the slip ring 120 to slide relative to the rod body 111. A mounting hole 113 is provided near the distal end of the rod body 111. The knob 112 is rotatably mounted in the mounting hole 113. The rotation axis of the knob 112 and the rod body 111 is parallel to the length direction of the rod body 111. Furthermore, the knob 112 is positioned by the wall of the mounting hole 113 and will not slide along the length direction of the rod body 111. A cable 400 passes through the knob 112 and extends into the rod body 111, connecting with the slip ring 120 mounted on the rod body 111. Meanwhile, the cable 400 and the knob 112 can slide together along the length of the rod body 111, and the cable 400 and the knob 112 are relatively fixed in the circumferential direction of the rod body 111. In this way, when the slip ring 120 slides, it can drive the snare 500 to move through the cable 400, while the knob 112 will not slide with the cable 400. Furthermore, by applying force to the knob 112, the cable 400 can be rotated through the knob 112, thereby driving the snare 500 to rotate through the cable 400, thus adaptively adjusting the direction of the snare 500 and improving flexibility.

[0053] To facilitate the rotation of knob 112, an anti-slip structure is provided on the outer circumference of knob 112, which can be multiple anti-slip grooves.

[0054] Please refer to Figure 4Furthermore, a first limiting portion 114 is provided on the surface of the rod body 111. The number of first limiting portions 114 can be one or more; for example, in this embodiment, there are three first limiting portions 114. The three first limiting portions 114 are arranged at intervals in a predetermined direction, i.e., the length direction of the rod body 111. Each first limiting portion 114 can be configured as a snap-fit ​​groove. Obviously, in other embodiments, the first limiting portion 114 can also be configured as a snap-fit ​​protrusion. For ease of description, in the direction from the distal end to the proximal end of the rod body 111, the three first limiting portions 114 are respectively a first groove 1141, a second groove 1142, and a third groove 1143.

[0055] Please refer to Figures 2-3 Optionally, the slip ring 120 includes an operating body 121, a support 122, a limiting rod 123, and an elastic reset member 124. The operating body 121 is provided with a communicating mounting hole 1211 and a clearance hole 1212. The rod body 111 of the guide rod 110 passes through the mounting hole 1211 and slidably engages with the operating body 121 in a preset direction. The mounting hole 1211 is approximately rectangular, adapted to fit the rod body 111, preventing relative rotation between the guide rod 110 and the operating body 121, resulting in more stable sliding. The clearance hole 1212 is approximately perpendicular to the mounting hole 1211 and can be rectangular, etc. The support 122 is mounted on the operating body 121. The limiting rod 123 is rotatably engaged with the support 122. A second limiting part 130 is provided at the distal end of the limiting rod 123. The second limiting part 130 is used to extend out of the clearance hole 1212 and can selectively engage with one of a plurality of second limiting parts 130. The elastic reset member 124 is connected to both the operating body 121 and the limiting rod 123, and is used to make the second limiting part 130 tend to extend out of the clearance hole 1212.

[0056] It should be understood that the second limiting part 130 can be configured as a snap-fit ​​protrusion that engages with the first limiting part 114. Obviously, when the first limiting part 114 is configured as a snap-fit ​​protrusion, the second limiting part 130 can also be configured as a snap-fit ​​groove. When the operating body 121 slides relative to the rod body 111, the limiting rod 123 slides along with the operating body 121. When it slides to the point where the first limiting part 114 engages with the corresponding second limiting part 130, under the action of the elastic reset member 124, the limiting rod 123 rotates, and the second limiting part 130 can automatically snap into the first limiting part 114, thereby locking the relative position of the slip ring 120 and the guide rod 110, ensuring the stable and reliable position of the snare 500. Since there are three first limiting parts 114, the second limiting part 130 can engage with the first groove 1141, the second groove 1142, and the third groove 1143 respectively. Specifically, when the second limiting part 130 engages with the first groove 1141, the snare 500 extends fully out of the sheath 300 and is used as a snare electrode. When the second limiting part 130 engages with the second groove 1142, the snare 500 partially retracts into the sheath 300, and the snare 500 can be used as a needle electrode. When the second limiting part 130 engages with the third groove 1143, the snare 500 retracts fully into the sheath 300, and the snare 500 can be used as an argon electrode.

[0057] Please refer to Figure 5 Optionally, the limiting rod 123 includes a first rod body 1231 and a second rod body 1232 connected together. The first rod body 1231 and the second rod body 1232 are set at an angle, for example, they can be set as an integral structure and set at 90°. The first rod body 1231 is rotatably engaged with the operating body 121, the second rod body 1232 passes through the clearance hole 1212, and the second limiting part 130 is provided at the end of the second rod body 1232. The second limiting part 130 is directly integrated into the second rod body 1232, which is convenient for processing and manufacturing.

[0058] It should be understood that the elastic reset member 124 can be a spring. One end of the elastic reset member 124 is fixed to the first rod 1231, and the other end is in contact with the operating body 121. The spring is in a compressed state, so that the first rod 1231 always tends to extend out of the clearance hole 1212. In this way, under the action of the elastic reset member 124, the first limiting part 114 can automatically engage with the second limiting part 130, and the engagement between the two can be maintained continuously, thereby preventing the first limiting part 114 and the second limiting part 130 from disengaging. When it is necessary to engage and lock, press the limiting rod 123 to overcome the elastic force of the elastic reset member 124, so that the first limiting part 114 moves away from the second limiting part 130. The operation is convenient.

[0059] Please refer to Figure 6In this embodiment, optionally, the proximal end of the snare 500 is fixedly connected to the cable 400, and the distal end of the snare 500 can be an arc-shaped tip 510. The current is more concentrated at the tip 510, which is convenient for cutting tissue and also facilitates the formation of a needle-shaped electrode at the tip 510 when part of the snare 500 is retracted into the sheath 300.

[0060] The endoscopic multifunctional treatment instrument provided in this embodiment has multiple switchable working states, and the switching operation between each state is simple, efficient, and has minimal impact on the patient, greatly improving surgical efficiency and success rate. By switching between working states, it can adapt to procedures such as resection, hemostasis, ablation, and vaporization of lesions of different sizes.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multifunctional endoscopic treatment device, characterized in that, include: The device comprises a handle mechanism (100), a three-way tube (200), a sheath (300), a cable (400), and a snare (500). The handle mechanism (100) is connected to the first end of the three-way tube (200), the second end of the three-way tube (200) is connected to the sheath (300), and the third end of the three-way tube (200) is used to introduce liquid or inert gas. The cable (400) passes through both the sheath (300) and the three-way tube (200), with one end of the cable (400) connected to the snare (500) and the other end connected to the handle mechanism (100). The handle mechanism (100) is used to move the snare (500) relative to the sheath (300) via the cable (400) to adjust the position of the snare (500) relative to the sheath (300). The handle mechanism (100) includes a guide rod (110) and a slip ring (120). The slip ring (120) is slidably engaged with the guide rod (110). The guide rod (110) is connected to the sheath (300) through the tee tube (200). The slip ring (120) is connected to the cable (400). The slip ring (120) is used to drive the cable (400) to move when sliding relative to the guide rod (110), so as to adjust the position of the snare (500) relative to the sheath (300). The guide rod (110) is provided with a first limiting part (114), and the slip ring (120) is provided with a second limiting part (130). The first limiting part (114) and the second limiting part (130) can be disengaged and engaged. The number of the first limiting part (114) is multiple, and the multiple first limiting parts (114) are arranged at intervals in a preset direction. The second limiting part (130) is used to selectively engage with one of the multiple first limiting parts (114) when the slip ring (120) slides relative to the guide rod (110) in the preset direction.

2. The endoscopic multifunctional treatment device according to claim 1, characterized in that: One of the first limiting part (114) and the second limiting part (130) is configured as a snap-fit ​​protrusion, and the other is configured as a snap-fit ​​groove. The snap-fit ​​protrusion is used to snap into the snap-fit ​​groove in a detachable manner.

3. The endoscopic multifunctional treatment device according to claim 2, characterized in that: The slip ring (120) includes an operating body (121), a support (122), and a limiting rod (123). The operating body (121) is provided with a connecting assembly hole (1211) and a clearance hole (1212). The guide rod (110) passes through the assembly hole (1211) and is slidably engaged with the slip ring (120). The support (122) is installed on the operating body (121). The limiting rod (123) is rotatably engaged with the support (122). The second limiting part (130) is provided on the limiting rod (123). The second limiting part (130) is used to extend out of the clearance hole (1212) and engage with the first limiting part (114).

4. The endoscopic multifunctional treatment device according to claim 3, characterized in that: The limiting rod (123) includes a first rod body (1231) and a second rod body (1232) connected together. The first rod body (1231) and the second rod body (1232) are set at an angle. The first rod body (1231) is rotatably engaged with the operating body (121). The second rod body (1232) passes through the clearance hole (1212). The second limiting part (130) is disposed at the end of the second rod body (1232).

5. The endoscopic multifunctional treatment device according to claim 3, characterized in that: The slip ring (120) also includes an elastic reset member (124), which is connected to both the operating body (121) and the limiting rod (123) to make the second limiting part (130) tend to extend out of the clearance hole (1212).

6. The endoscopic multifunctional treatment device according to claim 1, characterized in that: The guide rod (110) includes a rod body (111) and a knob (112). The knob (112) is rotatably engaged with the rod body (111). The cable (400) passes through the knob (112) and is connected to the slip ring (120). The cable (400) is slidably engaged with the knob (112), and the two are relatively fixed in the rotation direction of the knob (112).

7. The endoscopic multifunctional treatment device according to claim 6, characterized in that: The outer circumference of the knob (112) is provided with an anti-slip structure.

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