Water-injectable single-pole high-frequency electrotome for flexible endoscope

Abstract

The utility model provides a water-injectable single-pole high-frequency electrotome for a flexible endoscope, and relates to the field of endoscope consumables. The water-injectable single-pole high-frequency electrotome for the flexible endoscope comprises a handle mechanism, a limiting mechanism, a sheathing canal, an inhaul cable and an electrotome body. The handle mechanism comprises a sliding rod and a core rod which are matched in a sliding mode. The limiting mechanism is slidably matched with the sliding rod and can be locked relative to the sliding rod after sliding, and the limiting mechanism is used for abutting against the core rod so as to limit the sliding range of the core rod; the sheath tube is provided with a water injection channel and installed on the sliding rod, the inhaul cable penetrates through the sheath tube, one end of the inhaul cable is connected with the core rod, and the other end of the inhaul cable is connected with the electrotome body. The electrotome body is in sliding fit with the sheathing canal. The electrotome can adjust the limit position of the electrotome body pushed out of the sheathing canal as required, and is convenient and flexible to use.

Description

Technical Field

[0001] The utility model relates to the field of endoscopic consumables, and more specifically, to a water-injectable monopolar high-frequency electric knife for flexible endoscopes. Background Art

[0002] The water-injectable monopolar high-frequency electric knife for flexible endoscopes is a medical device specifically used for endoscopic examinations and minimally invasive surgeries. The tip of the high-frequency electric knife can generate high-frequency current to coagulate the target tissue or separate it from the surrounding tissue when contacting the tissue, thus achieving the purpose of cutting and hemostasis. The water injection function can wash the cutting site. The main feature of the water-injectable high-frequency electric knife is its water injection function, which is mainly achieved by arranging a water injection channel in the sheath tube at the metal knife head of the electric knife, so that the liquid can flow out from the water injection channel and flow along the metal knife head. In addition, the water injection channel of the high-frequency water-injectable electric knife can also be connected to a liquid flow controller to control the dripping flow rate through this controller. Such a design can effectively prevent the generation of eschar during the cutting process, reduce the adhesion between the metal knife head and the bleeding tissue, and lower the local temperature, thereby better protecting normal tissues. The electric knife uses high-frequency alternating current to cut and coagulate tissues. The electric knife can reduce bleeding, shorten the operation time, and provide a very clean surgical field without the need to ligate all blood vessels. The electric knife heats the tissue with the current itself. The current must pass through the tissue to produce an effect. The current conducts in the tissue to generate heat, and the heat comes from the oscillation of cellular ions. The oscillating ions collide with each other in the cell, and their energy is released in the form of heat.

[0003] After research by the inventor, it is found that the existing water-injectable monopolar high-frequency electric knife for flexible endoscopes has at least the following disadvantages:

[0004] The extreme position of the knife head extension cannot be adjusted through the handle part, which is inconvenient to use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a water-injectable monopolar high-frequency electric knife for flexible endoscopes, which can adjust the extreme position of the electric knife body extending out of the sheath tube as required, and is convenient and flexible to use.

[0006] The embodiments of the utility model are implemented as follows:

[0007] In a first aspect, the utility model provides a water-injectable monopolar high-frequency electric knife for flexible endoscopes, comprising:

[0008] A handle mechanism, a limiting mechanism, a sheath, a cable and an electric knife body; the handle mechanism includes a sliding rod and a core rod that can be slidably matched; the limiting mechanism can be slidably matched with the sliding rod and can be locked relative to the sliding rod after sliding, and the limiting mechanism is used to abut against the core rod to limit the sliding range of the core rod; the sheath is provided with a water injection channel, the sheath is installed on the sliding rod, the cable is passed through the sheath, one end of the cable is connected to the core rod, and the other end of the cable is connected to the electric knife body; the electric knife body is slidably matched with the sheath.

[0009] In an optional embodiment, the limiting mechanism includes an input member and an output member, the input member is rotatably matched with the slide rod in the circumferential direction of the slide rod, the output member is slidably matched with the slide rod in the length direction of the slide rod, the input member is transmission-connected with the output member, and when the output member rotates relative to the slide rod, it can drive the output member to slide relative to the slide rod; the output member is used to abut against the core rod to limit the sliding range of the core rod.

[0010] Based on the above scheme, by rotating the input part, the rotational motion can be converted into the linear telescopic motion of the output part, so as to adjust the position of the output part. When the position of the output part is adjusted, the position of the core rod abutting against the output part during the pushing process also changes. After the core rod abuts against the output part, the core rod can no longer push the electrosurgical unit body from the sheath through the cable, thus adjusting the extreme position of the electrosurgical unit body, which is convenient to operate and flexible to use. In addition, by rotating the input part to adjust the position of the output part, the control accuracy is higher and the adjustment range is wider.

[0011] In an optional embodiment, the slide rod is provided with a guide groove extending in the length direction thereof; the input member and the slide rod are relatively fixed in the length direction of the slide rod; the output member is installed in the guide groove, the output member is slidably matched with the guide groove in the length direction of the guide groove, and the output member and the slide rod are relatively fixed in the circumferential direction of the slide rod; the input member is threadedly connected to the output member.

[0012] Based on the above scheme, the matching structure of the input part and the output part is simple, easy to process and manufacture, and has high assembly accuracy and high control accuracy. In addition, the input part and the output part are matched through a threaded structure, which has a self-locking function. When the position adjustment of the input part is completed, it is automatically locked with the output part, and the position of the output part relative to the slide rod is firm, and the limiting effect is good.

[0013] In an alternative embodiment, the input member is provided with an internal thread groove, and the input member is sleeved outside the sliding rod; the output member is provided with an external thread groove, and the output member is located within the area surrounded by the input member, and the internal thread groove is threadedly connected to the external thread groove.

[0014] Based on the above solution, the input member is positioned through the sliding rod, the position of the input member is accurate and reliable, and it is more stable when rotating, which is beneficial to driving the output member to slide in the guiding chute.

[0015] In an alternative embodiment, the sliding rod is provided with scale marks arranged in the circumferential direction of the sliding rod.

[0016] Based on the above solution, when rotating the input member to adjust the position of the output member, the rotation angle of the input member can be determined by observing the scale marks on the sliding rod, and then the distance that the output member moves in the length direction of the sliding rod can be obtained, so as to achieve precise control of the extreme position of the electrosurgical knife body.

[0017] In an alternative embodiment, the output member includes a slider, a limiting rod, and a limiting block. The slider is slidably engaged with the guiding chute, and the input member is threadedly connected to the slider; the limiting rod is fixed to the slider, the limiting block is fixed to the limiting rod, an avoidance hole is provided on the limiting rod, and the cable is threaded through the avoidance hole and is slidably engaged with the avoidance hole; the limiting block is used to abut against the core rod to limit the sliding range of the core rod.

[0018] Based on the above solution, the core rod is limited by the abutment of the limiting block and the core rod, and the limiting structure is simple and reliable.

[0019] In an alternative embodiment, the limiting block is arranged as an annular structure surrounding the limiting rod.

[0020] Based on the above solution, the contact area between the core rod and the limiting block is large, the limiting is stable, and the limiting effect is good.

[0021] In an alternative embodiment, a three-way injection interface is installed on the sheath tube, a sealing ring is arranged inside the sliding rod, the sealing ring is located on the side close to the core rod of the three-way injection interface, and the cable penetrates through the sealing ring.

[0022] Based on the above solution, by providing a three-way injection interface, the liquid delivery is convenient and the use is flexible.

[0023] In an alternative embodiment, the handle mechanism further includes a locking knob, the locking knob is screwed to the core rod, and the locking knob can abut against the sliding rod to limit the sliding of the core rod relative to the sliding rod.

[0024] Based on the above solution, after the position of the electrotome body is adjusted, the locking knob is used to lock the core rod and the sliding rod. The core rod cannot slide relative to the sliding rod, and the position of the electrotome body is locked, so it is not easy to shift automatically during use, and it is convenient and reliable to use.

[0025] In an alternative embodiment, a bead is rotatably mounted on the sliding rod, and the bead is relatively fixed to the sliding rod in the length direction of the sliding rod; the cable is slidably disposed through the bead, and the cable is relatively fixed to the bead in the circumferential direction of the cable.

[0026] Based on the above solution, by rotating the bead, the electrotome body can be driven to rotate through the cable, so as to adjust the angle of the electrotome body, make the electrotome body better contact with the tissue, reduce the surgical difficulty, improve the surgical quality and improve the surgical efficiency.

[0027] The beneficial effects of the embodiments of the present invention are:

[0028] In summary, for the flexible endoscope with water-injectable monopolar high-frequency electrotome provided in this embodiment, during use, after the electrotome body reaches the set position in cooperation with the endoscope, the electrotome body can be first pushed out of the sheath through the core rod and the cable. Then, according to the actual situation, the position of the limit mechanism is adjusted, and then the core rod is continuously pushed to drive the electrotome body to be pushed out of the sheath. When the core rod moves to the position where it abuts against the limit mechanism, at this time, the core rod cannot continue to push the electrotome body out of the sheath, and the limit position of the electrotome body protruding from the sheath is determined, and the electrotome body will not automatically protrude during the operation, improving the surgical safety. And when it is necessary to adjust the limit position of the electrotome body protruding from the sheath again, only the position of the limit mechanism needs to be adjusted continuously. In this way, the limit position of the electrotome body protruding from the sheath can be adaptively adjusted according to the needs, the operation is convenient and flexible, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 is a schematic structural diagram of the flexible endoscope with water-injectable monopolar high-frequency electrotome according to the embodiment of the present invention;

[0031] Figure 2 is a partial exploded structural diagram of the flexible endoscope with water-injectable monopolar high-frequency electrotome according to the embodiment of the present invention;

[0032] Figure 3Structural schematic diagram of the output member of the embodiment of the present utility model;

[0033] Figure 4 Partial sectional structural schematic diagram of the injectable monopolar high-frequency electrotome for flexible endoscope of the embodiment of the present utility model.

[0034] Icon:

[0035] 100 - Handle mechanism; 110 - Slide bar; 111 - First rod body; 112 - Second rod body; 113 - Guide chute; 114 - Scale mark; 120 - Core rod; 200 - Limiting mechanism; 210 - Input member; 220 - Output member; 221 - Slide block; 222 - Limiting rod; 223 - Limiting block; 224 - Avoidance hole; 300 - Sheath tube; 310 - Water injection channel; 400 - Cable; 500 - Electrotome main body; 600 - Locking knob; 700 - Bead; 800 - Three-way liquid injection interface; 900 - Threaded fixing ring. Detailed implementation manners

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

[0037] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings below is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] In the prior art, when a flexible endoscope with a water-injectable monopolar high-frequency electrotome is in use, the handle slides on the rod body, and the handle drives the cutter head to extend and retract through the inner core, in and out of the sheath tube 300. When the handle slides on the rod body to push the cutter head out of the sheath tube 300, there is only one limit position, that is, the position where the handle slides to abut against the front end of the rod body. In this way, the limit position of the cutter head extending out of the sheath tube 300 cannot be adjusted according to the actual situation, and the operation is inconvenient.

[0043] In view of this, the designer provides a flexible endoscope with a water-injectable monopolar high-frequency electrotome, which can adjust the limit position of the electrotome body 500 extending out of the sheath tube 300 as required, is flexible and convenient to use, and has a wide range of uses.

[0044] Please combine Figures 1 - 4In this embodiment, the water-injectable monopolar high-frequency electric knife for flexible endoscope includes a handle mechanism 100, a limiting mechanism 200, a sheath tube 300, a cable 400 and an electric knife body 500; the handle mechanism 100 includes a sliding rod 110 and a core rod 120 that can be slidably matched; the limiting mechanism 200 can be slidably matched with the sliding rod 110 and can be locked relative to the sliding rod 110 after sliding, and the limiting mechanism 200 is used to abut against the core rod 120 to limit the sliding range of the core rod 120; the sheath tube 300 is provided with a water injection channel 310, the sheath tube 300 is installed on the sliding rod 110, the cable 400 is passed through the sheath tube 300, one end of the cable 400 is connected to the core rod 120, and the other end of the cable 400 is connected to the electric knife body 500; the electric knife body 500 is slidably matched with the sheath tube 300.

[0045] Based on the above, the working principle of the water-fillable monopolar high-frequency electrosurgical unit for flexible endoscope provided in this embodiment is as follows:

[0046] During use, after the electrosurgical knife body 500 reaches the set position with the endoscope, the electrosurgical knife body 500 can be pushed out of the sheath tube 300 through the core rod 120 and the cable 400. Then, according to the actual situation, adjust the position of the limit mechanism 200, and then continue to push the core rod 120 to drive the electrosurgical knife body 500 to push out the sheath tube 300. When the core rod 120 moves to the position abutting against the limit mechanism 200, the core rod 120 can no longer push the electrosurgical knife body 500 out of the sheath tube 300. The limit position of the electrosurgical knife body 500 extending out of the sheath tube 300 is determined. During the operation, the electrosurgical knife body 500 will not automatically extend, thereby improving the safety of the operation. When it is necessary to adjust the limit position of the electrosurgical knife body 500 extending out of the sheath tube 300 again, continue to adjust the position of the limit mechanism 200. In this way, the limit position of the electrosurgical knife body 500 extending out of the sheath tube 300 can be adjusted adaptively according to the needs, and the operation is convenient and flexible, and the scope of use is wide.

[0047] The following embodiments illustrate the details of the water-fillable monopolar high-frequency electrosurgical unit for flexible endoscope provided in the present application by way of examples.

[0048] In this embodiment, optionally, the limiting mechanism 200 includes an input member 210 and an output member 220. The input member 210 is rotatably matched with the slide rod 110 in the circumferential direction of the slide rod 110, and the output member 220 is slidably matched with the slide rod 110 in the length direction of the slide rod 110. The input member 210 and the output member 220 are transmission connected. When the output member 220 rotates relative to the slide rod 110, it can drive the output member 220 to slide relative to the slide rod 110; the output member 220 is used to abut against the core rod 120 to limit the sliding range of the core rod 120.

[0049] With such a design, by rotating the input member 210, the rotational motion can be converted into the linear telescopic motion of the output member 220, thereby realizing the adjustment of the position of the output member 220. After the position of the output member 220 is adjusted, the position where the core rod 120 abuts against the output member 220 during the pushing process of the core rod 120 also changes. After the core rod 120 abuts against the output member 220, the core rod 120 can no longer push the electrosurgical knife body 500 out of the sheath tube 300 through the cable 400, realizing the adjustment of the limit position of the electrosurgical knife body 500, with convenient operation and flexible use. Moreover, by rotating the input member 210 to adjust the position of the output member 220, the control accuracy is higher and the adjustment range is wider.

[0050] Please combine Figure 1 and Figure 2 , optionally, the slide rod 110 includes a first rod body 111 and a second rod body 112. One end of the first rod body 111 and one end of the second rod body 112 can be detachably connected through a snap structure, which is convenient for disassembly and assembly. The core rod 120 is slidably engaged with the first rod body 111, and a guiding chute 113 extending in its length direction is provided on the second rod body 112; the input member 210 is rotatably mounted on the second rod body 112. For example, a bearing can be provided between the input member 210 and the second rod body 112, with flexible sliding and making the input member 210 and the slide rod 110 relatively fixed in the length direction of the slide rod 110. The output member 220 is installed in the guiding chute 113, and the output member 220 is slidably engaged with the guiding chute 113 in the length direction of the guiding chute 113, and the output member 220 and the second rod body 112 are relatively fixed in the circumferential direction of the second rod body 112. The input member 210 is threadedly connected to the output member 220.

[0051] With such a design, the matching structure of the input member 210 and the output member 220 is simple, which is convenient for processing and manufacturing, and has high assembly accuracy and high control accuracy. Moreover, the input member 210 and the output member 220 are matched through a threaded structure and have a self-locking function. When the position adjustment of the input member 210 is completed, automatic locking with the output member 220 is realized, and the position of the output member 220 relative to the slide rod 110 is firm and the limiting effect is good.

[0052] In an optional embodiment, the input member 210 is provided with an internal thread groove, and the input member 210 is sleeved outside the slide rod 110; the output member 220 is provided with an external thread groove, and the output member 220 is located within the area surrounded by the input member 210, and the internal thread groove is threadedly connected to the external thread groove.

[0053] With such a design, the input member 210 is positioned through the slide rod 110, the position of the input member 210 is accurate and firm, and it is more stable when rotating, which is beneficial to driving the output member 220 to slide in the guiding chute 113.

[0054] Further, scale marks 114 are arranged on the outer peripheral surface of the second rod body 112 in the circumferential direction of the slide rod 110. For example, the scale marks 114 are set as ten integers from 1 to 10. A scale groove is provided on the input member 210. When the scale groove is aligned with one of the ten numbers, the position of the output member 220 relative to the second rod body 112 can be known through this number, and the adjustment is convenient and flexible. That is to say, when rotating the input member 210 to adjust the position of the output member 220, the angle of rotation of the input member 210 can be determined by observing the scale marks 114 on the slide rod 110, and then the distance that the output member 220 moves in the length direction of the slide rod 110 can be obtained, so as to realize the precise control of the extreme positions of the electrosurgical knife body 500.

[0055] It should be understood that the scale marks 114 are not limited to ten gears and can be designed according to requirements. In addition, in this embodiment, optionally, when the input member 210 rotates one week, it can complete ten gears. When rotating from the 1 scale to the 10 scale, the output member 220 travels 10 mm in the length direction of the second rod body 112.

[0056] Please refer to Figure 3 , in this embodiment, optionally, the output member 220 includes a slider 221, a limiting rod 222 and a limiting block 223. The slider 221 is slidably engaged with the guiding chute 113, and the input member 210 is threadedly connected to the slider 221. The limiting rod 222 is fixed to the slider 221, the limiting block 223 is fixed to the limiting rod 222, an avoidance hole 224 is provided on the limiting rod 222, and the cable 400 is threaded through the avoidance hole 224 and is slidably engaged with the avoidance hole 224; the limiting block 223 is used to abut against the core rod 120 to limit the sliding range of the core rod 120. By abutting the limiting block 223 against the core rod 120, the limiting of the core rod 120 is realized, and the limiting structure is simple and reliable.

[0057] Further, the limiting block 223 is arranged as an annular structure surrounding the limiting rod 222. The contact area between the core rod 120 and the limiting block 223 is large, the limiting is stable, and the limiting effect is good.

[0058] In other embodiments, optionally, the handle mechanism further includes a locking knob 600. The locking knob 600 is screwed to the core rod 120 and can abut against the slide rod 110 to limit the relative sliding of the core rod 120 with respect to the slide rod 110. After the position of the electrosurgical knife body 500 is adjusted, the core rod 120 and the slide rod 110 are locked by using the locking knob 600, and the core rod 120 cannot slide relative to the slide rod 110, so the position of the electrosurgical knife body 500 is locked, and it is not easy to automatically shift during use, and the use is convenient and reliable.

[0059] It should be understood that the locking knob 600 can be, but is not limited to, a screw.

[0060] Please refer to Figure 1 In this embodiment, optionally, a three-way liquid injection interface 800 is installed on the sheath tube 300. A sealing ring is arranged inside the sliding rod 110. The sealing ring is located on the side of the three-way liquid injection interface 800 close to the core rod 120. The cable 400 penetrates through the sealing ring. By providing the three-way liquid injection interface 800, liquid transportation is convenient and the use is flexible. In addition, in other embodiments, a pressure extension tube, a flow regulator, etc. can also be configured on the sheath tube 300. By cooperating with the three-way liquid injection interface 800, the function of regulating the water pressure can be achieved.

[0061] In this embodiment, optionally, a bead 700 is rotatably installed on the sliding rod 110. The bead 700 and the sliding rod 110 are relatively fixed in the length direction of the sliding rod 110. The cable 400 is slidably disposed inside the bead 700. The cable 400 and the bead 700 are relatively fixed in the circumferential direction of the cable 400. By rotating the bead 700, the electric knife body 500 can be driven to rotate through the cable 400, so as to adjust the angle of the electric knife body 500, enabling the electric knife body 500 to better contact the tissue, reducing the surgical difficulty, improving the surgical quality, and improving the surgical efficiency.

[0062] For example, the bead 700 is provided with a through hole for the cable 400 to pass through. The through hole is flat. A part of the cable 400 is also flat. The flat part of the cable 400 is disposed in the through hole of the bead 700. The cable 400 can slide relative to the through hole, but cannot rotate relative to the through hole. At this time, by rotating the bead 700, the cable 400 can be driven to rotate, thereby driving the electric knife body 500 to rotate.

[0063] In this embodiment, optionally, the types of the head ends of the knife heads of the electric knife body 500 are diverse, such as sword-shaped, spherical, right-angled, cylindrical straight-shaped, triangular, and spiral-shaped, etc. Different types of head ends of the knife heads are convenient for application in different surgeries, and their diversity increases the wide applicability of the product.

[0064] Please refer to Figure 4 In this embodiment, optionally, a threaded fixing ring 900 is screwed and fixed at the distal end of the sheath tube 300, that is, the end of the sheath tube 300 where the electric knife body 500 extends. The threaded fixing ring 900 is made of polytetrafluoroethylene, and the material is the same as that of the sheath tube 300, with high insulation. The threaded fixing ring 900 is for the electric knife body 500 to pass through, and the threaded fixing ring 900 can limit the electric knife body 500 from disengaging from the sheath tube 300. There is a gap between the electric knife body 500 and the threaded fixing ring 900, and this gap communicates with the lumen of the sheath tube 300. The lumen of the sheath tube 300 is the water injection channel 310.

[0065] The injectable monopolar high-frequency electrotome for flexible endoscope provided in this embodiment can adjust the position of the limiting mechanism 200, thereby adjusting the position of the core rod 120 relative to the sliding rod 110 when the core rod 120 abuts against the limiting mechanism 200. After the core rod 120 abuts against the limiting mechanism 200, the core rod 120 can no longer push the electrotome main body 500 out of the sheath tube 300, thus limiting the extreme position of the electrotome main body 500 extending out of the sheath tube 300, that is, the adjustment of the extreme position of the electrotome main body 500 can be realized, and the application range is wide.

[0066] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-injectable monopolar high-frequency electrotome for flexible endoscopes, characterized in that, include: A handle mechanism (100), a limiting mechanism (200), a sheath (300), a pull cable (400) and an electric knife body (500); the handle mechanism (100) comprises a slide bar (110) and a core bar (120) that can be slidably matched; the limiting mechanism (200) can be slidably matched with the slide bar (110) and can be locked relative to the slide bar (110) after sliding, and the limiting mechanism (200) is used to abut against the core bar (120) to limit the The sheath tube (300) is provided with a water injection channel (310), the sheath tube (300) is installed on the sliding rod (110), the cable (400) is passed through the sheath tube (300), one end of the cable (400) is connected to the core rod (120), and the other end of the cable (400) is connected to the electric knife body (500); the electric knife body (500) and the sheath tube (300) are slidably matched.

2. The water-fillable monopolar high-frequency electrosurgical unit for flexible endoscope according to claim 1, characterized in that: The limiting mechanism (200) comprises an input member (210) and an output member (220); the input member (210) is rotatably matched with the slide bar (110) in the circumferential direction of the slide bar (110); the output member (220) is slidably matched with the slide bar (110) in the length direction of the slide bar (110); the input member (210) and the output member (220) are transmission-connected; when the output member (220) rotates relative to the slide bar (110), it can drive the output member (220) to slide relative to the slide bar (110); the output member (220) is used to abut against the core rod (120) to limit the sliding range of the core rod (120).

3. The water-fillable monopolar high-frequency electrosurgical unit for flexible endoscope according to claim 2, characterized in that: The slide bar (110) is provided with a guide groove (113) extending in the length direction thereof; the input member (210) and the slide bar (110) are relatively fixed in the length direction of the slide bar (110); the output member (220) is installed in the guide groove (113), the output member (220) is slidably matched with the guide groove (113) in the length direction of the guide groove (113), and the output member (220) and the slide bar (110) are relatively fixed in the circumferential direction of the slide bar (110); the input member (210) and the output member (220) are threadedly connected.

4. The water-fillable monopolar high-frequency electrosurgical unit for flexible endoscope according to claim 3, characterized in that: The input member (210) is provided with an internal thread groove, and the input member (210) is sleeved on the outside of the sliding rod (110); the output member (220) is provided with an external thread groove, and the output member (220) is located in the area surrounded by the input member (210), and the internal thread groove is threadedly connected to the external thread groove.

5. The water-injectable monopolar high-frequency electrotome for flexible endoscope according to claim 3, wherein: Scale marks (114) arranged in the circumferential direction of the sliding rod (110) are provided on the sliding rod (110).

6. The water-injectable monopolar high-frequency electrotome for flexible endoscope according to claim 3, wherein: The output member (220) includes a slider (221), a limit rod (222) and a limit block (223). The slider (221) is slidably engaged with the guiding chute (113), and the input member (210) is threadedly connected to the slider (221); the limit rod (222) is fixed to the slider (221), the limit block (223) is fixed to the limit rod (222), an avoidance hole (224) is provided on the limit rod (222), and the cable (400) is threaded through the avoidance hole (224) and is slidably engaged with the avoidance hole (224); the limit block (223) is used for abutting against the core rod (120) to limit the sliding range of the core rod (120).

7. The water-injectable monopolar high-frequency electrotome for flexible endoscope according to claim 6, wherein: The limit block (223) is arranged as an annular structure surrounding the limit rod (222).

8. The water-injectable monopolar high-frequency electrotome for flexible endoscope according to claim 1, wherein: A three-way liquid injection interface (800) is installed on the sheath tube (300), a sealing ring is arranged in the sliding rod (110), the sealing ring is located on the side of the three-way liquid injection interface (800) close to the core rod (120), and the cable (400) penetrates through the sealing ring.

9. The water-injectable monopolar high-frequency electrotome for flexible endoscope according to claim 1, wherein: The handle mechanism further includes a locking knob (600). The locking knob (600) is screwed to the core rod (120), and the locking knob (600) can abut against the sliding rod (110) to limit the sliding of the core rod (120) relative to the sliding rod (110).

10. The water-injectable monopolar high-frequency electrotome for flexible endoscope according to claim 1, wherein: A bead (700) is rotatably installed on the sliding rod (110). The bead (700) is relatively fixed to the sliding rod (110) in the length direction of the sliding rod (110); the cable (400) is slidably threaded through the bead (700), and the cable (400) is relatively fixed to the bead (700) in the circumferential direction of the cable (400).

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