Devices, systems, and operating handles for ablation treatment of the digestive tract

Abstract

The application relates to a device for ablation treatment of the digestive tract, comprising an inner guide rod, an outer sleeve, an expandable component and an operating handle, the expandable component comprising a supporting framework and an electrode array film, the supporting framework having a radial-shrinking contracted working state and a radial-expanding expanded working state under the control of the operating handle; the supporting framework comprises a plurality of link mechanisms, which can transform the supporting framework between the contracted working state and the expanded working state; when the supporting component is in the radial-expanding expanded working state, the supporting component supports the electrode array film, and the inner wall of the upper digestive tract, especially the duodenum, can be accurately treated.

Description

Technical Field

[0001] This invention relates to a medical device, particularly a device for applying energy to the digestive tract to ablate its tissues. Background Technology

[0002] In the prior art, CN114786605A discloses a device for duodenal pulsed electric field therapy. This device expands an expandable member by controlling the relative rotation of a first and second elongated body to adapt to the shape of the duodenal wall. However, this patent document does not disclose an operating handle for manipulating the two elongated bodies. The expandable member is generally made of a flexible polymer membrane with electrodes. However, this membrane has poor rigidity after expansion and is easily deformed by pressure from the intestinal wall, resulting in poor circumferential adhesion to the intestinal wall. When an electric field is applied to the intestinal tissue, it is difficult to accurately ablate the approximately 1 mm villous tissue of the intestine. Summary of the Invention

[0003] The purpose of this invention is to provide a device, system, and operating handle for ablation therapy of the digestive tract, which has better rigidity after expansion.

[0004] One of the technical solutions of this invention is:

[0005] A device for ablation therapy of the digestive tract, comprising:

[0006] Inner guide rod;

[0007] An outer tube is fitted onto the inner guide rod, and the inner guide rod is rotatably disposed relative to the outer tube;

[0008] An expandable component surrounds the front of the outer sleeve and / or the front of the inner guide rod. The expandable component includes a support frame and an electrode array membrane. The electrode array membrane is connected to the support frame. When the support frame is in an expanded working state, the electrode array membrane is stretched open. When the support frame is in a contracted working state, the electrode array membrane is contracted onto the support frame. The electrode array membrane has multiple electrodes for receiving electrical signals.

[0009] An operating handle, used to manipulate the inner guide rod to rotate relative to the outer sleeve, causing the expandable component to expand or contract, the operating handle comprising:

[0010] The operating handle body, the rear part of the outer sleeve is fixedly connected to the operating handle body;

[0011] A central gear is rotatably connected to the operating handle body, and the rear part of the inner guide rod is fixedly connected to the central gear.

[0012] An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

[0013] Preferably, the support frame includes multiple X-shaped linkage mechanisms, each including a first link, a second link, and a side link. The first and second links intersect and are pivotally connected at the intersection. One end of the outer end of the first link and the outer end of the second link is slidably connected to the front or rear of the side link, and the other end is pivotally connected to the rear or front of the side link. The front of the inner guide rod is fitted with a front connecting seat, and the two are rotatably connected by a thread. The front end of the outer tube is fixedly connected to a rear connecting seat. The inner end of the first link is rotatably connected to the rear connecting seat via a pivot, and the inner end of the second link is rotatably connected to the front connecting seat via a pivot. During the forward or reverse rotation of the inner guide rod relative to the outer tube, the distance between the rear connecting seat and the front connecting seat changes, and the distance between the outer ends of the first and second links also changes accordingly. Thus, the support frame changes between a contracted working state and an expanded working state.

[0014] Preferably, the central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

[0015] Preferably, the outer sleeve is fixedly connected to the front part of the operating handle body, and the rear part of the outer sleeve is sleeved inside the axial extension section, and the axial extension section and the rear part of the outer sleeve are rotatably arranged relative to each other.

[0016] The second technical solution of the present invention is: a device for ablation therapy of the digestive tract, comprising:

[0017] Inner guide rod;

[0018] An outer sleeve is fitted onto the inner guide rod, and the outer sleeve is rotatably configured relative to the inner guide rod.

[0019] An expandable component surrounds the front of the outer sleeve and / or the front of the inner guide rod. The expandable component includes a support frame and an electrode array membrane. The electrode array membrane is connected to the support frame. When the support frame is in an expanded working state, the electrode array membrane is stretched open. When the support frame is in a contracted working state, the electrode array membrane is contracted onto the support frame. The electrode array membrane has multiple electrodes for receiving electrical signals.

[0020] An operating handle, used to manipulate the outer sleeve to rotate relative to the inner guide rod, causing the expandable component to expand or contract, the operating handle comprising:

[0021] The operating handle body, the rear part of the inner guide rod is fixedly connected to the operating handle body;

[0022] A central gear is rotatably connected to the operating handle body, and the rear part of the outer sleeve is fixedly connected to the central gear.

[0023] An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

[0024] Preferably, the support frame includes multiple X-shaped linkage mechanisms, each including a first link, a second link, and a side link. The first and second links intersect and are pivotally connected at the intersection. One end of the outer end of the first link and the outer end of the second link is slidably connected to the front or rear of the side link, and the other end is pivotally connected to the rear or front of the side link. The front of the inner guide rod is fixedly connected to a front connecting seat, and the front of the outer sleeve is fitted with a rear connecting seat, with the two being rotatably connected by threads. The inner end of the first link is rotatably connected to the rear connecting seat via a pivot, and the inner end of the second link is rotatably connected to the front connecting seat via a pivot. During the forward or reverse rotation of the outer sleeve relative to the inner guide rod, the distance between the rear connecting seat and the front connecting seat changes, and the distance between the outer ends of the first and second links also changes accordingly. Thus, the support frame changes between a contracted working state and an expanded working state.

[0025] Preferably, the central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

[0026] Preferably, the rear part of the inner guide rod is fixedly connected to the rear part of the operating handle body, the rear part of the outer sleeve is sleeved inside the axial extension section and the two are fixedly connected, and the inner guide rod passes through the axis of the central gear and the two are rotatably arranged relative to each other.

[0027] Preferably, the operating handle body has a viewing window, and the viewing window or the edge of the viewing window has scale lines. The slider is visually visible in the viewing window and points to the scale lines to indicate the position of the slider.

[0028] Preferably, two intermediate gears are provided between the inner ring teeth and the central gear, and the rotation axes of the two intermediate gears are symmetrically distributed on both sides of the rotation axis of the central gear.

[0029] Preferably, when the support frame is in a contracted working state and / or an expanded working state, each side rod is parallel to the front part of the inner guide rod, and the side rods are arranged circumferentially around the axis of the inner guide rod.

[0030] Preferably, the length of the side rod in the front-back direction is approximately equal to the width of the electrode array film in the front-back direction, with a difference of less than 1.5 mm, and preferably less than 0.5 mm or equal.

[0031] A system for ablation therapy of the digestive tract, comprising the aforementioned apparatus for ablation therapy of the digestive tract, further comprising: a signal generator configured to generate an electrical signal for therapy and electrically connected to electrodes.

[0032] An operating handle is provided for manipulating an inner guide rod to rotate relative to an outer sleeve, the outer sleeve being fitted onto the inner guide rod. The operating handle comprises:

[0033] The outer sleeve is fixedly connected to the operating handle body;

[0034] A central gear is rotatably connected to the operating handle body, and the inner guide rod is fixedly connected to the central gear.

[0035] An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

[0036] Preferably, the central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

[0037] Preferably, the outer sleeve is fixedly connected to the front part of the operating handle body, the outer sleeve is sleeved inside the axial extension section, and the axial extension section and the rear part of the outer sleeve are rotatably arranged relative to each other.

[0038] An operating handle is provided for manipulating an outer sleeve to rotate relative to an inner guide rod, the outer sleeve being fitted onto the inner guide rod, the operating handle comprising:

[0039] The inner guide rod is fixedly connected to the operating handle body.

[0040] A central gear is rotatably connected to the operating handle body, and the outer sleeve is fixedly connected to the central gear.

[0041] An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

[0042] Preferably, the central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

[0043] Preferably, the rear part of the inner guide rod is fixedly connected to the rear part of the operating handle body, the rear part of the outer sleeve is sleeved inside the axial extension section and the two are fixedly connected, and the inner guide rod passes through the axis of the central gear and the two are rotatably arranged relative to each other.

[0044] Preferably, the operating handle body has a viewing window, and the viewing window or the edge of the viewing window has scale lines. The slider is visually visible in the viewing window and points to the scale lines to indicate the position of the slider.

[0045] Preferably, two intermediate gears are provided between the inner ring teeth and the central gear, and the rotation axes of the two intermediate gears are symmetrically distributed on both sides of the rotation axis of the central gear.

[0046] Compared with the prior art, the present invention has the following advantages:

[0047] The variable speed gear system, consisting of an inner ring gear, an intermediate gear, and a central gear, allows the central gear to rotate at a larger angle after the operating knob is turned at a small angle. This drives the inner guide rod or outer sleeve to rotate, making it easy to operate. Furthermore, the support frame provides support for the electrode array membrane, resulting in better adhesion to the inner wall of the digestive tract. Attached Figure Description

[0048] Appendix Figure 1 This is the front view of the device, with the support frame in a retracted working state at this time;

[0049] Appendix Figure 2 This is a perspective view of the device with the operating handle omitted; in this case, the support frame is in an expanded working state.

[0050] Appendix Figure 3 This is a perspective view of one embodiment of the support frame, in which the support frame is in an expanded working state;

[0051] Appendix Figure 4 for Figure 3 The front view of the supporting frame, at which point the supporting frame is in the retracted working state;

[0052] Appendix Figure 5 for Figure 3 The support frame is only shown in the main view of an X-shaped linkage mechanism, at which point the support frame is in the expanded working state.

[0053] Appendix Figure 6 for Figure 5 The front view of the supporting frame when it is in the retracted working state;

[0054] Appendix Figure 7 for Figure 2 The top view of the electrode array film when the support frame is in the contracted working state is shown, with the support frame rolled up and folded on the support frame.

[0055] Appendix Figure 8 for Figure 2 The top view of the electrode array film folded between the support frame when the support frame is in the contracted working state.

[0056] Appendix Figure 9 for Figure 2 The top view of the electrode array film wrapped around the support frame when the support frame is in the contracted working state.

[0057] Appendix Figure 10 for Figure 9 A top view of the electrode array film wrapped around the support frame when the support frame is in the expanded working state.

[0058] Appendix Figure 11In one embodiment, the main structural view of the support frame of the present invention in its expanded working state is shown when the inner guide rod is used as the rotation drive rod.

[0059] Appendix Figure 12 For the appendix Figure 11 A sectional view along the AA direction;

[0060] Appendix Figure 13 for Figure 11 The main view of the supporting frame in the contracted working state;

[0061] Appendix Figure 14 for Figure 13 BB direction sectional view;

[0062] Appendix Figure 15 for Figure 14 Enlarged cross-sectional view along the CC direction;

[0063] Appendix Figure 16 In another embodiment, the main structural view of the support frame of the present invention in the expanded working state when the outer sleeve is used as the rotation drive rod;

[0064] Appendix Figure 17 for Figure 16 DD-direction sectional view;

[0065] Appendix Figure 18 for Figure 16 The main view of the supporting frame in the contracted working state;

[0066] Appendix Figure 19 for Figure 18 EE direction sectional view;

[0067] Appendix Figure 20 for Figure 19 Enlarged cross-sectional view in the FF direction;

[0068] Appendix Figure 21 A front view of the operating handle located at the proximal end;

[0069] Appendix Figure 22 For the appendix Figure 21 The GG-direction cross-sectional view shows the slider at the front limit position.

[0070] Appendix Figure 23 Rear view of the operating handle located at the proximal end;

[0071] Appendix Figure 24 For the appendix Figure 21 The GG-direction sectional view shows the slider moved to the middle position relative to the operating handle body.

[0072] Appendix Figure 25 For the appendix Figure 21The GG-direction cross-sectional view shows the slider at its rear limit position.

[0073] Appendix Figure 26 for Figure 22 HH direction cross-sectional view;

[0074] The components include: 1. Inner guide rod; 2. Outer sleeve; 3. Expandable component; 4. Electrode array film; 5. Electrode; 6. Operating handle; 7. Operating handle body; 8. Central gear; 9. Operating knob; 10. Knob cavity; 11. Inner ring gear; 12. Intermediate gear; 13. Support frame; 14. X-shaped linkage mechanism; 15. First link; 16. Second link; 17. Side rod; 18. Rear connecting seat; 19. Front connecting seat; 20. Rear locking block; 21. Front locking block; 22. Axial extension section; 23. Slider; 24. Front limit stop; 25. Rear limit stop; 26. Viewing window; 27. Scale line; 28. Front guide cap; 29. ​​Rear guide cap; 30. Guide groove; 31. Guide wire through hole; 32. Insulating layer; 33. Front end connector; 34. Rear end connector; 35. Outer sheath. Detailed Implementation

[0075] In this invention, the digestive tract refers to the oral cavity, esophagus, stomach, duodenum, small intestine, large intestine, and anus. The upper digestive tract refers to the areas that a gastroscopy can penetrate, including the esophagus, stomach, and duodenum. This invention is particularly applicable to the upper digestive tract. "Front" in this invention refers to the direction in which the device advances into the digestive tract, and "rear" refers to the direction of retraction, for example, as shown in the attached image. Figure 1 In this context, the left-facing direction is considered the front, and the right-facing direction is considered the rear. The terms "front" and "rear" in this article are defined in the same direction. The front end also refers to the end furthest from the operator (doctor), and is also known in the industry as the distal end; the rear end refers to the end closest to the operator, and is also known in the industry as the proximal end.

[0076] See Figures 1 to 15 ,and Figures 21 to 26 One embodiment of a device for ablation therapy of the digestive tract includes:

[0077] Inner guide rod 1;

[0078] Outer tube 2, which is sleeved on the inner guide rod 1, the inner guide rod 1 is rotatably arranged relative to the outer tube 2, but the inner guide rod 1 is prohibited from moving in the front-back direction relative to the outer tube 2;

[0079] Expandable component 3 surrounds the front part of the inner guide rod 1. The expandable component 3 includes a support frame 13 and an electrode array film 4. The electrode array film 4 has a plurality of electrodes 5 for receiving electrical signals.

[0080] The operating handle 6 is used to manipulate the inner guide rod 1 to rotate relative to the outer tube 2, so that the expandable component 3 expands or contracts.

[0081] See Figure 21-26 The operating handle 6 includes:

[0082] The rear part of the outer sleeve 2 is fixedly connected to the operating handle body 7.

[0083] The central gear 8 is rotatably connected to the operating handle body 7. The rear part of the inner guide rod 1 is fixedly connected to the central gear 8, and the axis of the inner guide rod 1 coincides with the rotation axis of the central gear 8.

[0084] The operating knob 9 has a knob cavity 10 and is rotatably connected to the operating handle body 7. The inner wall of the knob cavity 10 has inner ring teeth 11 arranged along the circumferential direction. The central gear 8 is located in the knob cavity 10, and the central gear 8 and the operating knob 9 have a rotation axis that coincides with each other. (See attached diagram) Figure 26 Two intermediate gears 12 are also provided between the inner ring gear 11 and the central gear 8. The two intermediate gears 12 are rotatably connected to the operating handle body 7, and the rotation axis of the intermediate gears 12 is parallel to the rotation axis of the central gear 8. The rotation axes of the two intermediate gears 12 are symmetrically distributed on both sides of the rotation axis of the central gear 8. Both intermediate gears 12 mesh with the central gear 8 and also mesh with the inner ring gear 11. Since the number of teeth in one revolution of the inner ring gear 11 is greater than the number of teeth in one revolution of the intermediate gears 12, the gear set composed of the inner ring gear 11, intermediate gears 12, and central gear 8 has a speed-changing function. For example, under certain gear transmission ratios, when the operating knob 9 is rotated one revolution, the central gear 8 rotates two revolutions, thereby driving the inner guide rod 1 to rotate two revolutions relative to the outer sleeve 2.

[0085] See appendix Figures 22-25 The central gear 8 has a forward axial extension section 22, on which a slider 23 is sleeved and threadedly connected. The slider 23 is slidably connected to the operating handle 6 body in the front-rear direction. The operating handle body 7 is also provided with a front limit stop 24 and a rear limit stop 25, which limit the slider 23 in the front-rear direction. When the slider 23 moves forward relative to the operating handle body 7 to the front limit position (e.g. Figure 22As shown), the slider 23 abuts against the front limit block 24; when the slider 23 moves backward relative to the operating handle body 7 to the rear limit position (e.g. Figure 25 As shown, the slider 23 abuts against the rear limit block 25.

[0086] like Figure 22 , Figure 23 As shown, the operating handle body 7 has a viewing window 26, which is made of transparent material or is a direct opening. A scale line 27 is provided on or around the edge of the viewing window 26, corresponding to the expansion diameter of the expandable component 3. The slider 23 is visually visible within the viewing window 26 and points towards the scale line 27, indicating its position. When the operating knob 9 is rotated, the intermediate gear 12 drives the central gear 8 to rotate faster. The thread on the forward extension section 22 causes the slider 23 to slide along the front-rear direction of the operating handle body 7. The operator (e.g., a doctor) can directly observe the position of the scale line 27 corresponding to the slider 23 through the viewing window 26, thus determining the expansion diameter of the expandable component 3.

[0087] The outer sleeve 2 is fixedly connected to the front of the operating handle body 7. The rear part of the outer sleeve 2 is fitted inside the axial extension section 22. The axial extension section 22 and the rear part of the outer sleeve 2 are rotatably arranged relative to each other. The rear part of the inner guide rod 1 is fixedly connected to the central gear 8. See attached diagram for details. Figure 22 , Figure 24 , Figure 25 The front part of the operating handle body 7 is fixedly connected to a front connector 33, and the rear part of the operating handle body 7 is fixedly connected to a rear connector 34. The outer sleeve 2 is fixedly connected to the front connector 33, which is equivalent to the outer sleeve 2 being fixedly connected to the operating handle body 7. The rear part of the outer sleeve 2 is sleeved inside the axial extension section 22, and the axial extension section 22 and the rear part of the outer sleeve 2 are rotatably arranged relative to each other. The inner guide rod 1 is inserted into the hole where the rotation axis of the central gear 8 is located, and the inner guide rod 1 is fixedly connected to the central gear 8, which is equivalent to the inner guide rod 1 being fixedly connected to the central gear 8. The rear part of the inner guide rod 1 is inserted into the rear connector 34, and the inner guide rod 1 and the rear connector 34 are rotatably arranged relative to each other.

[0088] See appendix Figure 2 -Appendix Figure 6 The expandable component 3 also includes a support frame 13, which has a radially shrinking contraction working state (as shown in the attached figure). Figure 4 ) and radially increasing expansion working state (as shown in the appendix) Figure 3The supporting frame 13 includes multiple linkage mechanisms, preferably 5-8, and particularly preferably 6-7. The linkage mechanism is an X-type linkage mechanism 14, see attached figure. Figure 5 and attached Figure 6 The X-shaped linkage mechanism 14 includes a first link 15, a second link 16, and a side link 17. The first link 15 and the second link 16 intersect and are pivotally connected at the intersection. One end of the outer end of the first link 15 and the outer end of the second link 16 is pivotally connected to the front or rear part of the side link 17, and the other end is slidably connected to the guide groove 30 of the rear or front part of the side link 17 along the front-rear direction. The inner end of the first link 15 is pivotally rotatably connected to the rear connecting seat 18, and the inner end of the second link 16 is pivotally rotatably connected to the front connecting seat 19. When the support frame 13 is in a retracted working state and / or an expanded working state, the side links 17 on each linkage mechanism are parallel to the front part of the inner guide rod 1, and the side links 17 are arranged circumferentially around the axis of the inner guide rod 1.

[0089] See appendix Figure 2 The length of the side rod 17 in the front-back direction is approximately equal to the width of the electrode array film 4 in the front-back direction, with a difference of less than 1.5 mm, preferably less than 0.5 mm or equal.

[0090] See Figures 11 to 15 The inner guide rod 1 is fitted with a front connecting seat 19 at its front end, and the two are rotatably connected by a thread. The front end of the outer sleeve 2 is fixedly connected to a rear connecting seat 18. The inner end of the first connecting rod 15 is pivotally connected to the rear connecting seat 18, and the inner end of the second connecting rod 16 is pivotally connected to the front connecting seat 19. During the forward or reverse rotation of the inner guide rod 1 relative to the outer sleeve 2, the thread at the front of the inner guide rod 1 causes the front connecting seat 19 to move forward or backward relative to the rear connecting seat 18. This changes the distance between the rear connecting seat 18 and the front connecting seat 19, further changing the distance between the outer ends of the first connecting rod 15 and the second connecting seat 16. Therefore, the support frame 13 is in a retracted working state (as shown in the attached diagram). Figure 13 and attached Figure 14 ), Expanded working status (as shown in the attached document) Figure 11 and attached Figure 12 The transformation occurs between ) and ).

[0091] See appendix Figure 12 Appendix Figure 14 and attached Figure 15The inner guide rod 1 is fixed with a radially outwardly protruding rear locking block 20. The rear locking block 20 is used to prevent the rear connecting seat 18 from moving forward or backward axially relative to the inner guide rod 1, but allows the inner guide rod 1 to rotate relative to the rear connecting seat 18. The rear locking block 20 engages in a radially recessed groove on the rear connecting seat 18 or the front end of the outer sleeve 2. When the inner guide rod 1 rotates, the front connecting seat 19 moves axially (front-back direction) under the action of the thread. The rear locking block 20 can prevent the rear connecting seat 18 or the outer sleeve 2 from moving axially (front-back direction) relative to the inner guide rod 1, so the support frame 13 can change between a contracted working state and an expanded working state.

[0092] Referring to the accompanying drawings, the support frame 13 is in an expanded working state, and each side rod 17 supports the electrode array film 4 so that the outer surface of the electrode array film 4 is as cylindrical as possible (see attached figures). Figure 10 (This is to adhere tightly to the inner wall of the digestive tract. See appendix.) Figure 7 To be continued Figure 9 When the support frame 13 is in its retracted working state, the electrode array film 4 is rolled or / and folded onto the support frame 13. The substrate of the electrode array film 4 is a commonly used flexible polymer insulating film, such as polyimide or PET material. Various electrode array films 4 and their connection methods with the support frame 13 can be selected. When the support frame 13 is in its retracted working state, the electrode array film 4 has a folded and rolled structure (as shown in the attached diagram). Figure 7 (as shown); or the electrode array film 4 has a folded structure (as shown in the attached image). Figure 8 (as shown); or the electrode array film 4 has a wound structure (as shown in the attached image). Figure 9 As shown, the connection relationship between the electrode array film 4 and the support frame 13, as well as the state of the electrode array film 4 when it is contracted, are only some of the listed embodiments.

[0093] Optionally, see Appendix Figure 9 and attached Figure 10 The electrode array membrane 4 is shaped like a spiral spring, possessing radially self-contracting elastic force. The electrode array membrane 4 is wound around each of the side rods 17, with its inner end connected to the side rod 17 and its outer end being a free end. The supporting frame 13... Figure 9 The contraction working state shown is towards Figure 10 During the expansion working state transition shown, each side rod 17 expands the electrode array film 4 outward, causing the diameter of the outermost electrode array film 4 on each side rod 17 to gradually increase, and the total number of circles of the electrode array film 4 to gradually decrease; as the supporting frame 13 moves from... Figure 10 The expansion working state towards Figure 9During the contraction and retraction process, the outermost electrode array membrane 4 gradually decreases in diameter due to its self-contracting elastic force, while the total number of rings gradually increases. To ensure the electrode array membrane 4 possesses this self-contracting elastic force, it is provided with shape memory alloy strips, for example, made of nickel-titanium alloy. When the support frame 13 is in the contraction state, the attached... Figure 9 The electrode array film 4 described herein has a shape that is a shape memory alloy strip.

[0094] See appendix Figure 1 The front end of the inner guide rod 1 is connected to a front guide cap 28 made of silicone material, and the front end of the outer tube 2 is connected to a rear guide cap 33 made of silicone material. The soft front guide cap 32 and rear guide cap 33 facilitate guiding the expandable component 3 forward or backward in the curved digestive tract without damaging the inner wall tissue of the digestive tract.

[0095] Assuming the electrode array membrane 4 has the same width in the front-to-back direction, regardless of whether the support frame 13 is in a contracted or expanded working state, the length of the side rod 17 in the front-to-back direction represents the front-to-back length of the expandable component 3 and remains constant. Therefore, the structure of the support frame 13 in this device makes its length in the front-to-back direction relatively short. In particular, the shorter length in the contracted working state is one of the advantages of this invention. When this invention moves forward or backward in the human digestive tract, the expandable component 3 needs to be designed to be as short as possible because it cannot bend, so as not to damage the inner wall of the digestive tract.

[0096] See appendix Figure 12 and attached Figure 14 The outer sleeve 2 is also wrapped with an outer sheath 35, and a wire (not shown) for transmitting electrical signals to the electrodes 5 on the electrode array film 4 is provided between the outer sleeve 2 and the outer sheath 35.

[0097] See appendix Figure 12 Appendix Figure 14 Appendix Figure 15 The inner guide rod 1 has an axial guide wire through hole 31 in the center for placing a surgical guide wire, and an insulating layer 32 is fixedly attached to the inner wall of the guide wire through hole 31.

[0098] See Figures 1 to 10 ,and Figures 16 to 20 , Figures 21 to 26 Another embodiment of a device for ablation therapy of the digestive tract. The diagrams of the operating handles are the same in both embodiments, but the connection relationships are different. The following borrows... Figures 21 to 26 To illustrate the structure of the operating handle in this embodiment, this embodiment will explain... Figures 21 to 26The description of the operating handle structure differs from that of the previous embodiment. This embodiment mainly describes the differences between this embodiment and the previous embodiment, while the similarities are briefly described or not repeated.

[0099] A device for ablation therapy of the digestive tract, comprising:

[0100] Inner guide rod 1;

[0101] Outer tube 2, which is sleeved on the inner guide rod 1, is rotatably mounted relative to the inner guide rod 1, but the inner guide rod 1 is prohibited from moving in the front-back direction relative to the outer tube 2;

[0102] Expandable component 3, see appendix Figure 16 To be continued Figure 20 The expandable component 3 surrounds the front of the outer sleeve 2 and / or the front of the inner guide rod 1. The expandable component 3 includes a support frame 13 and an electrode array membrane 4. The electrode array membrane 4 has multiple electrodes 5 for receiving electrical signals. The support frame 13 has a radially shrinking contraction working state and a radially expanding expansion working state. The support frame 13 includes multiple linkage mechanisms, which are X-type linkage mechanisms 14. The X-type linkage mechanism 14 includes a first link 15, a second link 16, and a side rod 17. The first link 15 and the second link 16 intersect. One end of the outer end of the first link 15 and the outer end of the second link 16 is pivotally connected to the front or rear of the side rod 17, and the other end is slidably connected to the rear or front of the side rod 17 along the front-rear direction guide groove 30. The front of the inner guide rod 1 is fixedly connected to a front connecting seat 19. The outer sleeve 2 is fitted with a rear connecting seat 18 at its front, and the two are rotatably connected by threads; the inner end of the first connecting rod 15 is pivotally connected to the rear connecting seat 18, and the inner end of the second connecting rod 16 is pivotally connected to the front connecting seat 19; during the forward or reverse rotation of the outer sleeve 2 relative to the inner guide rod 1, the distance between the rear connecting seat 18 and the front connecting seat 19 changes, and the distance between the outer ends of the first connecting rod 15 and the outer ends of the second connecting rod 16 also changes accordingly, so the support frame 13 changes between a contracted working state and an expanded working state.

[0103] Operating handle 6, see appendix Figure 21 To be continued Figure 26 The operating handle 6 is used to manipulate the outer tube 2 to rotate relative to the inner guide rod 1, so that the expandable component 3 expands or contracts.

[0104] The operating handle 6 includes:

[0105] The operating handle body 7, the rear part of the inner guide rod 1 is fixedly connected to the operating handle body 7;

[0106] The central gear 8 is rotatably connected to the operating handle body 7, and the rear part of the outer sleeve 2 is fixedly connected to the central gear 8.

[0107] An operating knob 9 has an inner cavity 10 and is rotatably connected to the operating handle body 7. The inner cavity 10 has inner ring teeth 11 arranged along its circumferential direction on its cavity wall. A central gear 8 is located within the inner cavity 10 and shares a rotation axis with the operating knob 9. At least one intermediate gear 12 is also provided between the inner ring teeth 11 and the central gear 8. The intermediate gear 12 is rotatably connected to the operating handle body 7, and its rotation axis is parallel to that of the central gear 8. The intermediate gear 12 meshes with the central gear 8 and also meshes with the inner ring teeth 11.

[0108] The central gear 8 has an axial extension section 22, on which a slider 23 is sleeved and threadedly connected. The slider 23 is slidably connected to the operating handle 6 body in the front-rear direction. The operating handle body 7 is also provided with a front limit block 24 and a rear limit block 25. When the slider 23 moves forward relative to the operating handle body 7 to the front limit position, the slider 23 abuts against the front limit block 24; when the slider 23 moves backward relative to the operating handle body 7 to the rear limit position, the slider 23 abuts against the rear limit block 25. The front limit block 24 and the rear limit block 25 play a limiting role.

[0109] The rear part of the inner guide rod 1 is fixedly connected to the rear part of the operating handle body 7. The rear part of the outer sleeve 2 is fitted inside the axial extension section 22 and the two are fixedly connected. The inner guide rod 1 passes through the axis of the central gear 8 and the two are rotatably arranged relative to each other. Specifically, see the appendix. Figure 22 , Figure 24 , Figure 25The front part of the operating handle body 7 is fixedly connected to a front connector 33, and the rear part of the operating handle body 7 is fixedly connected to a rear connector 34. Unlike the previous embodiment, the outer sleeve 2 is rotatably connected to the front connector 33. The axial extension section 22 is fitted inside the rear part of the outer sleeve 2, and the axial extension section 22 is fixedly connected to the rear part of the outer sleeve 2, which is equivalent to the central gear 8 being fixedly connected to the outer sleeve 2. The inner guide rod 1 passes through the hole where the rotation axis of the central gear 8 is located, and the inner guide rod 1 is rotatably connected to the central gear 8. The rear part of the inner guide rod 1 is inserted into the rear connector 34, and the inner guide rod 1 is fixedly connected to the rear connector 34, which is equivalent to the inner guide rod 1 being fixedly connected to the operating handle body 7.

[0110] See appendix Figure 21 To be continued Figure 25 The operating handle body 7 is provided with a viewing window 26, and a scale line 27 is provided on the viewing window 26 or at the edge of the viewing window 26. The slider 23 is visually located within the viewing window 26 and points to the scale line 27, which is used to display the position of the slider 23, so that the operator can observe and confirm the degree of expansion of the expandable component 3.

[0111] See appendix Figure 17 Appendix Figure 19 Appendix Figure 20 The outer tube 2 is fixed with a front locking block 21. The front locking block 21 is used to prevent the outer tube 2 from moving forward or backward axially relative to the front connecting seat 19, but allows the outer tube 2 to rotate relative to the front connecting seat 19. The front locking block 21 is engaged with the front connecting seat 19 or the inner guide rod 1.

[0112] A system for ablation therapy of the digestive tract, further comprising: a signal generator (not shown) configured to generate an electrical signal for therapy and electrically connected to electrode 5.

[0113] One embodiment of an operating handle is provided, which is not limited to the ablation therapy device for the digestive tract proposed in this application. See appendix. Figure 21 To be continued Figure 26 The operating handle 6 is used to manipulate the inner guide rod 1 to rotate relative to the outer sleeve 2. The outer sleeve 2 is fitted onto the inner guide rod 1. The operating handle 6 includes:

[0114] The outer sleeve 2 is fixedly connected to the operating handle body 7;

[0115] The central gear 8 is rotatably connected to the operating handle body 7, and the inner guide rod 1 is fixedly connected to the central gear 8.

[0116] An operating knob 9 has an inner cavity 10 and is rotatably connected to the operating handle body 7. The inner cavity 10 has inner ring teeth 11 arranged along its circumferential direction on its cavity wall. A central gear 8 is located within the inner cavity 10 and shares a rotation axis with the operating knob 9. At least one intermediate gear 12 is also provided between the inner ring teeth 11 and the central gear 8. The intermediate gear 12 is rotatably connected to the operating handle body 7, and its rotation axis is parallel to that of the central gear 8. The intermediate gear 12 meshes with the central gear 8 and also meshes with the inner ring teeth 11.

[0117] The central gear 8 has an axial extension section 22, on which a slider 23 is sleeved and threadedly connected. The slider 23 is slidably connected to the operating handle body 7 in the front-rear direction. The operating handle body 7 is also provided with a front limit block 24 and a rear limit block 25. When the slider 23 slides forward relative to the operating handle body 7 to the front limit position, the slider 23 abuts against the front limit block 24. When the slider 23 slides backward relative to the operating handle body 7 to the rear limit position, the slider 23 abuts against the rear limit block 25.

[0118] The outer sleeve 2 is fixedly connected to the front of the operating handle body 7. The outer sleeve 2 is fitted inside the axial extension section 22, and the axial extension section 22 and the rear of the outer sleeve 2 are rotatably arranged relative to each other. See attached diagram for details. Figure 22 , Figure 24 , Figure 25 The front part of the operating handle body 7 is fixedly connected to a front connector 33, and the rear part of the operating handle body 7 is fixedly connected to a rear connector 34. The outer sleeve 2 is fixedly connected to the front connector 33, which is equivalent to the outer sleeve 2 being fixedly connected to the operating handle body 7. The rear part of the outer sleeve 2 is sleeved inside the axial extension section 22, and the axial extension section 22 and the rear part of the outer sleeve 2 are rotatably arranged relative to each other. The inner guide rod 1 is inserted into the hole where the rotation axis of the central gear 8 is located, and the inner guide rod 1 is fixedly connected to the central gear 8, which is equivalent to the inner guide rod 1 being fixedly connected to the central gear 8. The rear part of the inner guide rod 1 is inserted into the rear connector 34, and the inner guide rod 1 and the rear connector 34 are rotatably arranged relative to each other.

[0119] The operating handle body 7 has a viewing window 26, and a scale line 27 is provided on or around the edge of the viewing window 26. The slider 23 is visually visible within the viewing window 26 and points to the scale line 27, indicating the position of the slider 23. When the operating knob 9 is rotated, the intermediate gear 12 drives the central gear 8 to rotate faster. The thread on the axially extended section 22 causes the slider 23 to slide along the front-rear direction of the operating handle body 7. The operator (e.g., a doctor) can directly observe the position of the scale line 27 corresponding to the slider 23 through the viewing window 26, thus determining the expansion diameter of the expandable component 3.

[0120] See appendix Figure 26 Two intermediate gears 12 are provided between the inner ring tooth 11 and the central gear 8, and the rotation axis of the two intermediate gears 12 is symmetrically distributed on both sides of the rotation axis of the central gear 8.

[0121] A second embodiment of the operating handle is not limited to the ablation therapy device for the digestive tract proposed in this application; see attached document. Figure 21 To be continued Figure 26 Although Embodiment 2 of this operating handle uses the same drawings as Embodiment 1, the related connection structures are still different, as detailed in the text description. The operating handle 6 is used to manipulate the outer sleeve 2 to rotate relative to the inner guide rod 1. The outer sleeve 2 is fitted onto the inner guide rod 1. The operating handle 6 includes:

[0122] The central gear 8 is rotatably connected to the operating handle body 7, and the outer sleeve 2 is fixedly connected to the central gear 8.

[0123] An operating knob 9 has an inner cavity 10 and is rotatably connected to the operating handle body 7. The inner cavity 10 has inner ring teeth 11 arranged along its circumferential direction on its cavity wall. A central gear 8 is located within the inner cavity 10 and shares a rotation axis with the operating knob 9. At least one intermediate gear 12 is also provided between the inner ring teeth 11 and the central gear 8. The intermediate gear 12 is rotatably connected to the operating handle body 7, and its rotation axis is parallel to that of the central gear 8. The intermediate gear 12 meshes with the central gear 8 and also meshes with the inner ring teeth 11.

[0124] The central gear 8 has an axial extension section 22, on which a slider 23 is sleeved and threadedly connected. The slider 23 is slidably connected to the operating handle body 7 in the front-rear direction. The operating handle body 7 is also provided with a front limit block 24 and a rear limit block 25. When the slider 23 slides forward relative to the operating handle body 7 to the front limit position, the slider 23 abuts against the front limit block 24. When the slider 23 slides backward relative to the operating handle body 7 to the rear limit position, the slider 23 abuts against the rear limit block 25.

[0125] The rear part of the inner guide rod 1 is fixedly connected to the rear part of the operating handle body 7. The rear part of the outer sleeve 2 is fitted inside the axial extension section 22 and the two are fixedly connected. The inner guide rod 1 passes through the axis of the central gear 8 and the two are rotatably arranged relative to each other. Specifically, see the appendix. Figure 22 , Figure 24 , Figure 25 The front part of the operating handle body 7 is fixedly connected to a front connector 33, and the rear part of the operating handle body 7 is fixedly connected to a rear connector 34. Unlike the previous embodiment, the outer sleeve 2 is rotatably connected to the front connector 33. The axial extension section 22 is fitted inside the rear part of the outer sleeve 2, and the axial extension section 22 is fixedly connected to the rear part of the outer sleeve 2, which is equivalent to the central gear 8 being fixedly connected to the outer sleeve 2. The inner guide rod 1 passes through the hole where the rotation axis of the central gear 8 is located, and the inner guide rod 1 is rotatably connected to the central gear 8. The rear part of the inner guide rod 1 is inserted into the rear connector 34, and the inner guide rod 1 is fixedly connected to the rear connector 34, which is equivalent to the inner guide rod 1 being fixedly connected to the operating handle body 7.

[0126] The operating handle body 7 has a viewing window 26, and a scale line 27 is provided on or around the edge of the viewing window 26. The slider 23 is visually visible within the viewing window 26 and points to the scale line 27, indicating the position of the slider 23. When the operating knob 9 is rotated, the intermediate gear 12 drives the central gear 8 to rotate faster. The thread on the axially extended section 22 causes the slider 23 to slide along the front-rear direction of the operating handle body 7. The operator (e.g., a doctor) can directly observe the position of the scale line 27 corresponding to the slider 23 through the viewing window 26, thus determining the expansion diameter of the expandable component 3.

[0127] See appendix Figure 26 Two intermediate gears 12 are provided between the inner ring tooth 11 and the central gear 8, and the rotation axis of the two intermediate gears 12 is symmetrically distributed on both sides of the rotation axis of the central gear 8.

Claims

1. A device for ablation therapy of the digestive tract, characterized in that, It includes: Inner guide rod; An outer tube is fitted onto the inner guide rod, and the inner guide rod is rotatably disposed relative to the outer tube; An expandable component surrounds the front of the outer sleeve and / or the front of the inner guide rod. The expandable component includes a support frame and an electrode array membrane. The electrode array membrane is connected to the support frame. When the support frame is in an expanded working state, the electrode array membrane is stretched open. When the support frame is in a contracted working state, the electrode array membrane is contracted onto the support frame. The electrode array membrane has multiple electrodes for receiving electrical signals. An operating handle, used to manipulate the inner guide rod to rotate relative to the outer sleeve, causing the expandable component to expand or contract, the operating handle comprising: The operating handle body, the rear part of the outer sleeve is fixedly connected to the operating handle body; A central gear is rotatably connected to the operating handle body, and the rear part of the inner guide rod is fixedly connected to the central gear. An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

2. The device for ablation therapy of the digestive tract according to claim 1, characterized in that, The supporting frame includes multiple X-shaped linkage mechanisms, each comprising a first link, a second link, and a side link. The first and second links intersect and are pivotally connected at the intersection. One end of the outer end of the first link and the outer end of the second link is slidably connected to the front or rear of the side link, while the other end is pivotally connected to the rear or front of the side link. The front of the inner guide rod is fitted with a front connecting seat, and the two are rotatably connected by a thread. The front end of the outer tube is fixedly connected to a rear connecting seat. The inner end of the first link is rotatably connected to the rear connecting seat via a pivot, and the inner end of the second link is rotatably connected to the front connecting seat via a pivot. During the forward or reverse rotation of the inner guide rod relative to the outer tube, the distance between the rear and front connecting seats changes, as does the distance between the outer ends of the first and second links, thus causing the supporting frame to switch between a contracted working state and an expanded working state.

3. The apparatus for ablation therapy of the digestive tract according to claim 1, characterized in that, The central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

4. The apparatus for ablation therapy of the digestive tract according to claim 3, characterized in that, The outer sleeve is fixedly connected to the front part of the operating handle body, and the rear part of the outer sleeve is sleeved inside the axial extension section. The axial extension section and the rear part of the outer sleeve are rotatably arranged relative to each other.

5. A device for ablation therapy of the digestive tract, characterized in that, It includes: Inner guide rod; An outer sleeve is fitted onto the inner guide rod, and the outer sleeve is rotatably configured relative to the inner guide rod. An expandable component surrounds the front of the outer sleeve and / or the front of the inner guide rod. The expandable component includes a support frame and an electrode array membrane. The electrode array membrane is connected to the support frame. When the support frame is in an expanded working state, the electrode array membrane is stretched open. When the support frame is in a contracted working state, the electrode array membrane is contracted onto the support frame. The electrode array membrane has multiple electrodes for receiving electrical signals. An operating handle, used to manipulate the outer sleeve to rotate relative to the inner guide rod, causing the expandable component to expand or contract, the operating handle comprising: The operating handle body, the rear part of the inner guide rod is fixedly connected to the operating handle body; A central gear is rotatably connected to the operating handle body, and the rear part of the outer sleeve is fixedly connected to the central gear. An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

6. The apparatus for ablation therapy of the digestive tract according to claim 5, characterized in that, The supporting frame includes multiple X-shaped linkage mechanisms, each comprising a first link, a second link, and a side link. The first and second links intersect and are pivotally connected at the intersection. One end of the outer end of the first link and the outer end of the second link is slidably connected to the front or rear of the side link, while the other end is pivotally connected to the rear or front of the side link. A front connecting seat is fixedly connected to the front of the inner guide rod, and a rear connecting seat is fitted onto the front of the outer sleeve, with the two being rotatably connected by threads. The inner end of the first link is rotatably connected to the rear connecting seat via a pivot, and the inner end of the second link is rotatably connected to the front connecting seat via a pivot. During the forward or reverse rotation of the outer sleeve relative to the inner guide rod, the distance between the rear and front connecting seats changes, as does the distance between the outer ends of the first and second links, thus causing the supporting frame to switch between a contracted working state and an expanded working state.

7. The apparatus for ablation therapy of the digestive tract according to claim 5, characterized in that, The central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

8. The apparatus for ablation therapy of the digestive tract according to claim 7, characterized in that, The rear part of the inner guide rod is fixedly connected to the rear part of the operating handle body. The rear part of the outer sleeve is fitted inside the axial extension section and the two are fixedly connected. The inner guide rod passes through the axis of the central gear and the two are rotatably arranged relative to each other.

9. The apparatus for ablation therapy of the digestive tract according to claim 3 or 7, characterized in that, The operating handle body has a viewing window, and scale lines are provided on or around the viewing window. The slider is visually visible within the viewing window and points to the scale lines to indicate the position of the slider.

10. The apparatus for ablation therapy of the digestive tract according to claim 1 or 5, characterized in that, Two intermediate gears are provided between the inner ring teeth and the central gear, and the rotation axes of the two intermediate gears are symmetrically distributed on both sides of the rotation axis of the central gear.

11. The apparatus for ablation therapy of the digestive tract according to claim 2 or 6, characterized in that, When the supporting frame is in a contracted working state and / or an expanded working state, each side rod is parallel to the front of the inner guide rod, and the side rods are arranged circumferentially around the axis of the inner guide rod.

12. The apparatus for ablation therapy of the digestive tract according to claim 2 or 6, characterized in that, The length of the side rod in the front-to-back direction is approximately equal to the width of the electrode array film in the front-to-back direction, with a difference of less than 1.5 mm, preferably less than 0.5 mm or equal.

13. A system for ablation therapy of the digestive tract, characterized in that, It includes an apparatus for ablation treatment of the digestive tract as described in any one of claims 1-12, and further includes: a signal generator configured to generate an electrical signal for treatment and electrically connected to electrodes.

14. An operating handle, characterized in that, The operating handle is used to manipulate the inner guide rod to rotate relative to the outer sleeve, the outer sleeve being fitted onto the inner guide rod, and the operating handle includes: The outer sleeve is fixedly connected to the operating handle body; A central gear is rotatably connected to the operating handle body, and the inner guide rod is fixedly connected to the central gear. An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

15. The operating handle according to claim 14, characterized in that, The central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

16. The operating handle according to claim 15, characterized in that, The outer sleeve is fixedly connected to the front part of the operating handle body, and the outer sleeve is sleeved inside the axial extension section. The axial extension section and the rear part of the outer sleeve are rotatably arranged relative to each other.

17. An operating handle, characterized in that, The operating handle is used to manipulate the outer sleeve to rotate relative to the inner guide rod. The outer sleeve is fitted onto the inner guide rod. The operating handle includes: The inner guide rod is fixedly connected to the operating handle body. A central gear is rotatably connected to the operating handle body, and the outer sleeve is fixedly connected to the central gear. An operating knob has an inner cavity and is rotatably connected to the operating handle body. The inner cavity wall has inner ring teeth arranged along the circumferential direction. A central gear is located within the inner cavity and shares a rotation axis with the operating knob. At least one intermediate gear is also provided between the inner ring teeth and the central gear. The intermediate gear is rotatably connected to the operating handle body, and its rotation axis is parallel to that of the central gear. The intermediate gear meshes with the central gear and also meshes with the inner ring teeth.

18. The operating handle according to claim 17, characterized in that, The central gear has an axial extension section, on which a slider is sleeved and threadedly connected. The slider is slidably connected to the operating handle body in the front-rear direction. The operating handle body is also provided with a front limit block and a rear limit block. When the slider slides forward relative to the operating handle body to the front limit position, the slider abuts against the front limit block; when the slider slides backward relative to the operating handle body to the rear limit position, the slider abuts against the rear limit block.

19. The operating handle according to claim 18, characterized in that, The rear part of the inner guide rod is fixedly connected to the rear part of the operating handle body. The rear part of the outer sleeve is fitted inside the axial extension section and the two are fixedly connected. The inner guide rod passes through the axis of the central gear and the two are rotatably arranged relative to each other.

20. The operating handle according to claim 15 or 18, characterized in that, The operating handle body has a viewing window, and scale lines are provided on or around the viewing window. The slider is visually visible within the viewing window and points to the scale lines to indicate the position of the slider.

21. The operating handle according to claim 14 or 17, characterized in that, Two intermediate gears are provided between the inner ring teeth and the central gear, and the rotation axes of the two intermediate gears are symmetrically distributed on both sides of the rotation axis of the central gear.

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