Conveying device

Abstract

The present application relates to a kind of conveying device, the conveying device includes: outer sheath, the distal end has flexibility and can be bent;Traction wire, distal end is connected with the distal end of outer sheath;Control handle, including: main shaft, including fixed section and extension section, sliding sleeve, sleeve is set on extension section and is limited on extension section axial sliding;Rotary cylinder, rotatably sleeve is set on the outer wall of extension section and sliding sleeve, rotary cylinder is screwed with sliding sleeve;The proximal end of traction wire extends out of outer sheath and is connected with sliding sleeve;When rotary cylinder is rotated in positive direction or reverse direction relative to main shaft, rotary cylinder can drive sliding sleeve to move in axial direction to proximal end or distal end, make sliding sleeve tighten or loosen traction wire, adjust the bending degree of the distal end of outer sheath by adjusting the tightness of traction wire, better realize the bending and back bending function of the distal end of outer sheath;At the same time, the radial distance between sliding sleeve and outer sheath is reduced, avoid sliding sleeve to damage the surface of outer sheath due to large angle traction traction wire.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a delivery device. Background Technology

[0002] Atrial fibrillation (AF) is a rapid arrhythmia in which the atria replace the normal pacemaker. Currently, AF cardioversion methods include pharmacological cardioversion, electrical cardioversion, and catheter ablation. Currently, only catheter ablation can completely cure AF. Compared to traditional surgery, catheter ablation is an interventional treatment that avoids high-risk procedures such as open-chest surgery that cause massive bleeding. The incision caused by the puncture is very small and generally does not affect cardiac function. It has low risk, few complications, short operation time, high success rate, and fast postoperative recovery.

[0003] One key focus of research in this catheter ablation technique is ensuring the precise delivery of the ablation catheter to the lesion. However, the delivery device structure of related ablation catheters cannot effectively address the issues of bending and returning the distal end of the delivery device. Summary of the Invention

[0004] The purpose of this invention is to provide a conveying device to optimize the structure of the conveying device and better realize the bending and return functions at the far end of the conveying device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] According to one aspect of the present invention, a conveying device is provided, comprising: an outer sheath having a conveying channel formed therein, the distal end of the outer sheath being flexible and bendable; a traction wire disposed within the conveying channel, the distal end of the traction wire being connected to the distal end of the outer sheath; and a control handle comprising: a main shaft including a fixed section and an extension section axially connected, the extension section being disposed at the distal end of the fixed section, and the shaft diameter of the extension section being smaller than the shaft diameter of the fixed section; and a sliding sleeve slidably sleeved on the extension section and limited to axial sliding on the extension section; the outer wall of the sliding sleeve having The device is provided with an external thread; a rotating cylinder is rotatably fitted on the outer peripheral wall of the extension section and the sliding sleeve, and the inner wall of the rotating cylinder is provided with an internal thread, which is threaded with the external thread of the sliding sleeve; wherein, the proximal end of the outer sheath tube passes through the main shaft, and the proximal end of the traction wire extends out of the outer sheath tube and is connected to the sliding sleeve; when the rotating cylinder rotates in the forward or reverse direction relative to the main shaft, the rotating cylinder can drive the sliding sleeve to move axially towards the proximal or distal end, so that the sliding sleeve can tighten or loosen the traction wire, so as to adjust the curvature of the distal end of the outer sheath tube by adjusting the tightness of the traction wire.

[0007] As can be seen from the above technical solutions, the embodiments of the present invention have at least the following advantages and positive effects:

[0008] In the conveying device of this invention embodiment, the main shaft is configured as a fixed section and an extension section connected axially; a sliding sleeve is slidably fitted onto the extension section and limited to axial movement on the extension section; a rotating cylinder is fitted around the outer periphery of the sliding sleeve and the extension section, with the internal thread of the rotating cylinder threadedly connected to the external thread of the sliding sleeve. A guide tube is connected to the main shaft, and a traction wire is connected to the sliding sleeve. Thus, when the rotating cylinder rotates forward relative to the main shaft, it drives the sliding sleeve to move proximally along the axial direction of the extension section, causing the distal end of the traction wire to move relative to the outer sheath. Moving proximally, the traction wire is gradually tightened, causing the distal end of the outer sheath to gradually bend or increase in curvature. When the rotating cylinder rotates in the opposite direction to the main shaft, it drives the sliding sleeve to move distally along the axial direction of the extension section, causing the distal end of the traction wire to move distally relative to the outer sheath, gradually releasing the traction wire and reducing the curvature of the distal end of the outer sheath. This adjusts the curvature of the distal end of the outer sheath, better enabling the bending and retraction functions of the distal end, ensuring precise delivery of the ablation device to the lesion. Simultaneously, by utilizing the smaller shaft diameter of the extension section compared to the fixed section, the overall volume of the main shaft and sliding sleeve is reduced, facilitating axial positioning of the sliding sleeve and reducing the size of the rotating cylinder. This also helps reduce the radial distance between the sliding sleeve and the outer sheath, preventing damage to the surface of the outer sheath caused by the sliding sleeve pulling the traction wire at a large angle. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a conveying device according to an embodiment of the present invention.

[0010] Figure 2 yes Figure 1 A schematic diagram of its breakdown.

[0011] Figure 3 yes Figure 2 A schematic diagram of the middle part of the structure.

[0012] Figure 4 yes Figure 3 A schematic diagram of the structure of the central spindle, front axle section, and sliding sleeve.

[0013] Figure 5 yes Figure 4 A schematic diagram of the middle sliding sleeve.

[0014] Figure 6 yes Figure 2 Assembly diagram of the central spindle, front axle section, sliding sleeve, and outer sheath.

[0015] Figure 7 yes Figure 6 Sectional view along the AA direction.

[0016] Figure 8yes Figure 7 A schematic diagram of the structure of the proximal end of the middle traction wire.

[0017] Figure 9 yes Figure 4 A schematic diagram of the front axle section.

[0018] Figure 10 yes Figure 9 The front view.

[0019] Figure 11 yes Figure 10 Sectional view along the BB direction.

[0020] Figure 12 yes Figure 2 A schematic diagram of the upper and lower shells.

[0021] Figure 13 yes Figure 2 Assembly diagram of the lower housing and spindle.

[0022] Figure 14 yes Figure 13 Sectional view along the CC direction.

[0023] Figure 15 yes Figure 2 A schematic diagram of the structure of the inner and outer sheaths, three-way valve, sealing gasket, three-way assembly, sealing cap, and gland.

[0024] Figure 16 yes Figure 15 Sectional view along the DD direction.

[0025] Figure 17 yes Figure 15 Sectional view of region E in the middle.

[0026] Figure 18 yes Figure 3 A schematic diagram of the structure of the central spindle and sliding sleeve in another embodiment.

[0027] Figure 19 yes Figure 18 A schematic diagram of the middle sliding sleeve.

[0028] Figure 20 Figure 18 Assembly diagram of the central spindle and sliding sleeve with the front axle and outer sheath.

[0029] Figure 21 Figure 20 Sectional view from the FF direction.

[0030] Figure 22 Figure 21 A schematic diagram of the structure in another embodiment.

[0031] The reference numerals in the attached drawings are explained as follows: 1. Outer sheath; 11. First wire exit hole; 12. Second wire exit hole; 2. Traction wire; 2a. First traction wire; 2b. Second traction wire; 21. Fixing sleeve; 22. Fixing ring; 31. Main shell; 311. Upper shell; 3111. Pin; 3112. First extension; 312. Lower shell; 3121. Pin hole; 3122. Second extension; 313. Positioning groove; 31 4. Positioning rib; 32. Front shell; 33. Front cover; 34. Soft rubber nozzle; 35. Tail cover; 41. Main shaft; 410. Shaft cavity; 411. Fixed section; 4111. Circumferential limiting rib; 4112. Axial limiting rib; 412. Extension section; 4121. Slide rail; 4122. Bayonet; 4123. Alternating groove; 413. Folding hole; 414. Second through-hole; 42. Sliding sleeve; 421. Limiting groove; 4 22. Threaded part; 423. Traction hole; 423a. First traction hole; 423b. Second traction hole; 424. First positioning post; 425. Second positioning post; 43. Rotating cylinder; 431. Transmission rib; 44. Knob; 441. Rotating wheel; 4411. Transmission groove; 442. Rubber wheel; 4421. Anti-slip texture; 443. Locking groove; 45. Front axle part; 451. Shaft hole; 452. Insert tube; 4 521. Snap-fit ​​protrusion; 453. Support rib; 454. Connecting part; 455. First through-hole; 51. Three-way valve; 510. Valve cavity; 511. First connector; 512. Second connector; 513. Third connector; 514. Adhesive hole; 515. Sealing cavity; 516. Insertion groove; 52. Sealing gasket; 53. Sealing cap; 531. Through hole; 54. Pressure cap; 541. Through hole; 55. Three-way assembly. Detailed Implementation

[0032] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] Figure 1 This is a schematic diagram of the structure of a conveying device according to an embodiment of the present invention. Figure 2 yes Figure 1 A schematic diagram of its breakdown.

[0037] Please see Figure 1 and Figure 2 As shown, the delivery device provided in this embodiment of the invention is mainly used in interventional therapy to precisely deliver interventional instruments, such as ablation catheters, to the lesion site. The delivery device mainly includes an outer sheath 1, a traction wire 2, and a control handle.

[0038] For ease of description and understanding, the term "proximal end" as defined in this article refers to the end closer to the operator, and "distal end" refers to the end farther from the operator.

[0039] The outer sheath 1 contains a delivery channel primarily used for delivering ablation devices such as ablation catheters. The outer sheath 1 extends axially, with one end being the proximal end, closer to the operator; the other end is the distal end, further away from the operator and closer to the lesion. By moving the outer sheath 1 axially, the distal end is brought closer to the lesion, allowing the interventional device to be precisely delivered to the lesion location via the delivery channel within the outer sheath 1.

[0040] The distal end of the outer sheath 1 is flexible and bendable, allowing it to bend or bend back to adapt to different vascular curvatures, thus enabling the distal end of the outer sheath 1 to smoothly approach the lesion.

[0041] The traction wire 2 is used to adjust the bending angle of the distal end of the outer sheath 1, so that the interventional device can be smoothly delivered to the lesion through the outer sheath 1. Specifically, the traction wire 2 is located in the delivery channel of the outer sheath 1, and the distal end of the traction wire 2 is connected to the distal end of the outer sheath 1. By moving the traction wire 2 axially relative to the outer sheath 1, the traction wire 2 is tightened or loosened, and the tightness of the traction wire 2 is adjusted, thereby adjusting the bending angle of the distal end of the outer sheath 1.

[0042] It should be noted that the traction wire 2 can be made of steel wire or other flexible linear material.

[0043] Please see Figure 1 and Figure 2 As shown, the control handle mainly includes a housing, a bending module, and a sealing module.

[0044] The housing is constructed as the outer shell of the conveying device for being held by the operator's hand.

[0045] Please see Figure 1 and Figure 2 As shown, the bending module is located inside the housing. The bending module is used to control the traction wire 2 to move axially relative to the outer sheath tube 1, thereby realizing the bending or rewinding function of the distal end of the outer sheath tube 1.

[0046] Figure 3 yes Figure 2 A schematic diagram of the middle part of the structure. Figure 4 yes Figure 3 A schematic diagram of the structure of the central spindle 41, the front axle 45, and the sliding sleeve 42.

[0047] Please see Figures 1 to 4 As shown, in some embodiments, the bending module mainly includes a spindle 41, a sliding sleeve 42, and a rotating cylinder 43.

[0048] The main shaft 41 is located inside the housing and provides installation space for components such as the outer sheath 1, the sliding sleeve 42, and the rotating cylinder 43. The main shaft 41 has an axially extending shaft cavity 410, and the proximal end of the outer sheath 1 passes through and is fixed in the shaft cavity 410.

[0049] The main shaft 41 includes a fixed section 411 and an extension section 412 connected axially. The extension section 412 is located at the distal end of the fixed section 411, meaning that the distal end of the fixed section 411 and the proximal end of the extension section 412 are axially connected as a single unit. The shaft diameter of the extension section 412 is smaller than that of the fixed section 411. The fixed section 411 is used to fix the shaft within the housing, while the extension section 412 provides space for the installation and movement of the sliding sleeve 42.

[0050] Please see Figure 3 and Figure 4As shown, the sliding sleeve 42 has an annular structure and is slidably sleeved on the extension section 412 of the main shaft 41, and is limited to axial sliding on the extension section 412. That is, the sliding sleeve 42 is limited to sliding within the axial length range of the extension section 412 and is limited to axial movement in the axial direction of the extension section 412. At the same time, the proximal end of the traction wire 2 is fixed on the sliding sleeve 42. Therefore, the sliding sleeve 42 moves axially relative to the extension section 412 of the main shaft 41, thereby driving the traction wire 2 to move axially relative to the outer sheath tube 1, tightening or loosening the traction wire 2, so that the distal end of the traction wire 2 can move towards the proximal or distal end of the outer sheath tube 1, tightening or loosening the distal end of the outer sheath tube 1, thereby adjusting the curvature of the distal end of the outer sheath tube 1.

[0051] Figure 5 yes Figure 4 A schematic diagram of the middle sliding sleeve 42. Please refer to the diagram. Figures 2 to 5 As shown, in some embodiments, an axially extending slide rail 4121 protrudes from the outer peripheral wall of the extension section 412. Simultaneously, a limiting groove 421, which slides against the slide rail 4121, is recessed on the inner peripheral wall of the slide sleeve 42, extending axially along the slide sleeve 42. When the slide sleeve 42 is fitted onto the extension section 412 of the main shaft 41, the slide rail 4121 can slide relative to it within the limiting groove 421, thereby limiting the slide sleeve 42 to move axially in the extending direction of the slide rail 4121.

[0052] It should be noted that, in other embodiments, the inner peripheral wall of the sliding sleeve 42 may also be provided with an axially extending slide rail 4121, while the outer peripheral wall of the extension section 412 is recessed with a limiting groove 421 that cooperates with the slide rail 4121. The limiting groove 421 extends axially along the extension section 412. Therefore, the sliding sleeve 42 can also be slidably connected to the limiting groove 421 of the extension section 412 via the slide rail 4121, and thus slidably fitted onto the extension section 412.

[0053] Please see Figures 2 to 5 As shown, in some embodiments, the rotating cylinder 43 is rotatably sleeved on the outer peripheral wall of the extension 412 of the main shaft 41. The rotating cylinder 43 can rotate circumferentially relative to the main shaft 41, and thus rotate circumferentially relative to the extension 412. Specifically, the rotating cylinder 43 can rotate circumferentially relative to the main shaft 41 in either the forward or reverse direction.

[0054] The inner wall of the rotating cylinder 43 is provided with internal threads. At the same time, the sliding sleeve 42 is located inside the rotating cylinder 43, and the rotating cylinder 43 is fitted around the outer periphery of the sliding sleeve 42. The outer wall of the sliding sleeve 42 is provided with a threaded portion 422, which is threadedly connected to the internal threads of the rotating cylinder 43.

[0055] When the operator holds the control handle, the circumferential freedom of the main shaft 41 is restricted. This, combined with the slide rail 4121 on the extension section 412, further restricts the circumferential freedom of the sleeve 42. The rotating cylinder 43 is fitted around the outer periphery of the extension section 412 and the sleeve 42, thus restricting the radial freedom of the sleeve 42. Therefore, the sleeve 42 retains only the axial freedom to move along the slide rail 4121 and to tighten or loosen the traction wire 2 axially. Therefore, when the rotating cylinder 43 rotates circumferentially relative to the main shaft 41, it drives the sleeve 42 to move axially along the slide rail 4121, thereby causing the sleeve 42 to move axially relative to the extension section 412, tightening or loosening the traction wire 2, and adjusting the curvature of the distal end of the outer sheath 1.

[0056] Specifically, when the rotating cylinder 43 rotates forward relative to the main shaft 41, it drives the sliding sleeve 42 to move along the slide rail 4121 towards the proximal end of the extension section 412, thereby causing the distal end of the traction wire 2 to move towards the proximal end relative to the outer sheath tube 1, tightening the traction wire 2 and pulling the distal end of the outer sheath tube 1, causing the distal end of the outer sheath tube 1 to gradually bend or the degree of bending to gradually increase. When the rotating cylinder 43 rotates in the opposite direction relative to the main shaft 41, it drives the sliding sleeve 42 to move along the slide rail 4121 towards the distal end of the extension section 412, thereby causing the distal end of the traction wire 2 to move towards the distal end relative to the outer sheath tube 1, releasing the traction wire 2 and the distal end of the outer sheath tube 1, causing the degree of bending of the distal end of the outer sheath tube 1 to gradually decrease.

[0057] Furthermore, the sliding sleeve 42 can slide within the space between the outer peripheral wall of the extension section 412 and the inner wall of the rotating cylinder 43, which helps to reduce the overall volume of the extension section 412 and the sliding sleeve 42, and also helps to reduce the size of the rotating cylinder 43 and the housing, thereby reducing the overall radial dimension of the conveying device, making it easier for the operator to hold and operate. At the same time, it helps to bring the connection point between the sliding sleeve 42 and the traction wire 2 closer to the center of the main shaft 41, reducing the radial distance between the sliding sleeve 42 and the outer sheath tube 1, and thus bringing it closer to the surface of the outer sheath tube 1. This allows the sliding sleeve 42 to drive the traction wire 2 to be pulled radially outward at a small angle, effectively avoiding damage to the surface of the outer sheath tube 1 due to pulling the traction wire 2 at a large angle.

[0058] In some embodiments, the threaded portion 422 includes a plurality of right-hand threads arranged in parallel at intervals. Simultaneously, the internal thread within the rotating cylinder 43 is a right-hand internal thread. Therefore, when the rotating cylinder 43 rotates relative to the main shaft 41, the rotating cylinder 43 can drive the sliding sleeve 42 to perform axial relative movement relative to the main shaft 41.

[0059] It should be noted that in some other embodiments, the threaded portion 422 includes multiple left-handed threads, which are arranged in parallel at intervals. Meanwhile, the internal thread within the cylinder 43 is a left-handed internal thread.

[0060] In some embodiments, the rotating cylinder 43 completely covers the extension 412 of the main shaft 41. Specifically, the rotating cylinder 43 has an elongated cylindrical structure and extends along the axial direction of the main shaft 41. The axial length of the rotating cylinder 43 is greater than or equal to the axial length of the extension 412, thereby enabling the rotating cylinder 43 to completely cover the outer periphery of the extension 412. Simultaneously, the axial length of the internal thread on the inner wall of the rotating cylinder 43 corresponds to the axial length of the extension 412. Therefore, when the rotating cylinder 43 rotates forward or backward relative to the main shaft 41, the sliding sleeve 42 can move axially within the entire range of the extension 412.

[0061] Please see Figures 1 to 3 As shown, in some embodiments, the bending module further includes a knob 44, which is annular and sleeved on the outer peripheral wall of the rotating cylinder 43. The knob 44 can rotate forward or backward relative to the housing, thereby driving the rotating cylinder 43 to rotate forward or backward relative to the extension 412 of the main shaft 41.

[0062] In some embodiments, an axially extending transmission rib 431 is provided on the outer peripheral wall of the rotary cylinder 43. A transmission groove 4411, which mates with the transmission rib 431, is recessed on the annular inner sidewall of the knob 44 and extends axially. When the knob 44 is fitted onto the outer peripheral wall of the rotary cylinder 43, the transmission rib 431 is engaged within the transmission groove 4411. Therefore, when the knob 44 rotates, it can drive the rotary cylinder 43 to rotate synchronously via the transmission rib 431.

[0063] In some embodiments, multiple transmission ribs 431 are provided, and the multiple transmission ribs 431 are arranged circumferentially around the outer peripheral wall of the rotating cylinder 43 at intervals. Correspondingly, multiple transmission grooves 4411 are recessed on the annular inner sidewall of the knob 44, and the multiple transmission grooves 4411 are engaged with the multiple transmission ribs 431 one by one, thereby ensuring that the knob 44 and the rotating cylinder 43 can rotate stably and synchronously.

[0064] It should be noted that in other embodiments, the transmission rib 431 may also protrude from the annular inner wall of the knob 44, and correspondingly, the transmission groove 4411 is recessed from the outer peripheral wall of the cylinder 43.

[0065] Please see Figure 2 and Figure 3 As shown, in some embodiments, the knob 44 includes a rotating wheel 441 and a rubber wheel 442. The rotating wheel 441 is annular and is fitted onto the outer peripheral wall of the rotating cylinder 43, with a transmission groove 4411 located on the inner sidewall of the rotating wheel 441. The rubber wheel 442 is fitted onto the outer periphery of the rotating wheel 441 and can be made of rubber or other elastic materials with a high coefficient of friction to increase friction between the operator's hand and the knob 44, thereby increasing the comfort of operating the instrument and facilitating precise control of the knob 44's rotation.

[0066] In some embodiments, the rubber wheel 442 can be fixed to the outer peripheral wall of the rotating wheel 441 by adhesive bonding. It should be noted that in other embodiments, the rubber wheel 442 can also be fixed to the outer peripheral wall of the rotating wheel 441 by means of tight fit or snap-fit.

[0067] Please see Figure 3 As shown, in some embodiments, the outer peripheral wall of the rubber wheel 442 is provided with anti-slip textures 4421, which extend axially. Multiple anti-slip textures 4421 are provided, and these textures are densely distributed circumferentially around the outer peripheral wall of the rubber wheel 442. The anti-slip textures 4421 can further improve the friction between the operator's hand and the knob 44. Figure 6 yes Figure 2 Assembly diagram of the central spindle 41, front axle 45, sliding sleeve 42 and outer sheath 1. Figure 7 yes Figure 6 Sectional view along the AA direction.

[0068] Please see Figures 2 to 7 As shown, in some embodiments, the sliding sleeve 42 is provided with a traction hole 423 that axially penetrates the sliding sleeve 42, that is, the traction hole 423 penetrates the sliding sleeve 42 in the axial direction. The proximal end of the traction wire 2 passes through and is fixed in the traction hole 423. Therefore, when the sliding sleeve 42 moves along the slide rail 4121 towards the proximal end of the extension section 412, the sliding sleeve 42 can drive the distal end of the traction wire 2 to move towards the proximal end of the outer sheath tube 1 through the traction hole 423, causing the distal end of the outer sheath tube 1 to bend or the degree of bending to increase. When the sliding sleeve 42 moves along the slide rail 4121 towards the distal end of the extension section 412, the sliding sleeve 42 can release the distal end of the traction wire 2 through the traction hole 423, allowing the distal end of the traction wire 2 to move towards the distal end of the outer sheath tube 1, causing the degree of bending of the distal end of the outer sheath tube 1 to gradually decrease.

[0069] In some embodiments, a first positioning post 424 protrudes from the proximal end of the sliding sleeve 42, and the first positioning post 424 is located on one side of the proximal port of the traction wire 2. The first positioning post 424 is located on the side of the sliding sleeve 42 near the traction hole 423, and the proximal end of the traction wire 2 can pass through the traction hole 423 and be fixed to the first positioning post 424 through the traction hole 423. Therefore, when the sliding sleeve 42 moves along the slide rail 4121 towards the proximal end of the extension section 412, the sliding sleeve 42 can tighten the traction wire 2 in the traction hole 423 through the first positioning post 424, thereby driving the distal end of the traction wire 2 to move towards the proximal end of the outer sheath tube 1.

[0070] In some embodiments, when the sliding sleeve 42 slides along the proximal end of the axially extending section 412, the first positioning post 424 can abut against the end face of the fixed section 411, thereby limiting the range of movement of the proximal end of the sliding sleeve 42.

[0071] In some embodiments, the proximal end of the sliding sleeve 42 is provided with a plurality of first positioning posts 424, which are arranged circumferentially at intervals. When the sliding sleeve 42 slides along the proximal end of the axially extending section 412, the plurality of first positioning posts 424 can simultaneously abut against the end face of the fixed section 411, thereby keeping the sliding sleeve 42 able to smoothly stop in the proximal region of the extending section 412.

[0072] Figure 8 yes Figure 7 A schematic diagram of the structure near the proximal end of the middle traction wire 2. Please refer to [link / reference]. Figures 2 to 8 As shown, in some embodiments, the proximal end of the traction wire 2 is provided with a fixing sleeve 21 and a fixing ring 22. Both the fixing sleeve 21 and the fixing ring 22 can be made of steel. The proximal end of the traction wire 2 passes through the traction hole 423, and then passes through the fixing sleeve 21 and the fixing ring 22 in sequence, before bending the traction wire 2 back into the fixing sleeve 21. The fixing sleeve 21 clamps the traction wire 2 by means such as mechanical clamping. The fixing sleeve 21 and the traction wire 2 can be inserted into the traction hole 423, and the fixing ring 22 is located on the proximal side of the traction hole 423 and can be hooked onto the first positioning post 424. Therefore, when the sliding sleeve 42 slides along the proximal end of the axially extending section 412, the sliding sleeve 42 can tighten the traction wire 2 through the fixing ring 22 and drive the distal end of the traction wire 2 to move towards the proximal end of the outer sheath tube 1.

[0073] Figure 9 yes Figure 4 A schematic diagram of the structure of the front axle section 45. Figure 10 yes Figure 9 The front view. Figure 11 yes Figure 10 Sectional view along the BB direction.

[0074] Please see Figures 2 to 11 As shown, in some embodiments, the bending module further includes a front axle portion 45, which is coaxially disposed on the distal end of the extension 412 of the main shaft 41, and the proximal end of the front axle portion 45 is detachably connected to the distal end of the extension 412. The front axle portion 45 is located at the distal end of the main shaft 41. A front housing 32 is sleeved on the outer peripheral wall of the front axle portion 45, and a shaft hole 451 is provided at the axial center of the front axle portion 45, which communicates directly with the shaft cavity 410 of the main shaft 41. An outer sheath tube 1 is sequentially inserted into the main shaft 41 and the front axle portion 45, and extends distally from the distal end of the front axle portion 45.

[0075] In some embodiments, the front axle portion 45 includes a cannula 452 protruding from its proximal end, the cannula 452 being aligned and inserted into the distal end of the extension 412 of the spindle 41, i.e., the distal end of the extension 412 is detachably sleeved on the cannula 452.

[0076] In some embodiments, when the sliding sleeve 42 slides along the axial direction toward the distal end of the extension 412, the sliding sleeve 42 can abut against the front axle portion 45, thereby preventing the sliding sleeve 42 from disengaging from the distal end of the extension 412 and limiting the sliding sleeve 42 to move axially on the extension 412.

[0077] Please see Figures 4 to 7 As shown, in some embodiments, a second positioning post 425 protrudes from the distal end of the sliding sleeve 42, and the second positioning post 425 is located on one side of the distal port of the traction hole 423. When the sliding sleeve 42 slides along the distal end of the axially extending section 412, the second positioning post 425 of the sliding sleeve 42 can abut against the front axle portion 45, thereby limiting the range of movement of the distal end of the sliding sleeve 42.

[0078] In some embodiments, the distal end of the sliding sleeve 42 is provided with a plurality of second positioning posts 425, which are arranged circumferentially at intervals. When the sliding sleeve 42 slides along the distal end of the axial extension 412, the plurality of second positioning posts 425 can simultaneously abut against the end face of the front axle portion 45, thereby keeping the sliding sleeve 42 able to smoothly stop in the distal region of the extension 412.

[0079] Please see Figures 2 to 11 As shown, in some embodiments, a locking protrusion 4521 protrudes from the outer peripheral wall of the insertion tube 452, and a locking slot 4122 that mates with the locking protrusion 4521 is provided on the outer peripheral wall of the distal end of the extension section 412. When the insertion tube 452 is inserted into the interior of the distal end of the spindle 41, the locking protrusion 4521 can engage with the locking slot 4122 to confine the insertion tube 452 within the shaft cavity 410 at the distal end of the extension section 412.

[0080] In some embodiments, a plurality of locking protrusions 4521 are provided on the outer peripheral wall of the insertion tube 452, and the plurality of locking protrusions 4521 are arranged circumferentially at intervals on the outer peripheral wall of the insertion tube 452. At the same time, a plurality of locking slots 4122 are provided on the outer peripheral wall of the distal end of the extension section 412, and the plurality of locking protrusions 4521 can be engaged with the plurality of locking slots 4122 in a corresponding manner, thereby stably confining the insertion tube 452 within the shaft cavity 410 at the distal end of the extension section 412.

[0081] Please see Figures 4 to 7As shown, in some embodiments, a recessed clearance groove 4123 is provided on the inner wall of the shaft cavity 410 at the distal end of the extension section 412. The clearance groove 4123 extends axially, with its distal end extending to the distal port of the extension section 412 and its proximal end extending to the bayonet 4122. The bayonet 4122 is located on one side of the proximal end of the clearance groove 4123 and communicates with it. Therefore, when it is necessary to insert the insertion tube 452 into the shaft cavity 410 at the distal end of the extension section 412, the locking protrusion 4521 can move along the clearance groove 4123 to the proximal end of the clearance groove 4123, and then by rotating the front shaft portion 45, the locking protrusion 4521 can be engaged with the bayonet 4122.

[0082] Please see Figures 3 to 11 As shown, in some embodiments, a first insertion port 455 is provided on the outer wall of the front axle portion 45, and a first thread outlet 11 is provided on the outer wall of the outer sheath tube 1, which is arranged opposite to the first insertion port 455. The first insertion port 455 is located on the distal end side of the insertion tube 452, so that when the insertion tube 452 is inserted into the interior of the distal end of the extension section 412, the first insertion port 455 can be exposed on the outer wall of the front axle portion 45 and is not covered by the extension section 412. The distal end of the traction wire 2 is arranged in the delivery channel inside the outer sheath tube 1, and the proximal end of the traction wire 2 extends out of the outer sheath tube 1 from the first thread outlet 11, then extends out of the front axle portion 45 through the first insertion port 455, and then connects with the sliding sleeve 42 and is fixed at the traction hole 423 of the sliding sleeve 42.

[0083] In some embodiments, the first wire outlet 11 is located at the distal end of the first through outlet 455, which is located at the distal end of the extension section 412. Therefore, the sliding sleeve 42 can sequentially pull the traction wire 2 at a small angle through the first through outlet 455 and the first wire outlet 11, effectively avoiding damage to the surface of the outer sheath tube 1 due to pulling the traction wire 2 at a large angle.

[0084] Figure 12 yes Figure 2 A schematic diagram of the upper shell 311 and the lower shell 312. Figure 13 yes Figure 2 Assembly diagram of the lower housing 312 and the spindle 41. Figure 14 yes Figure 13 Sectional view along the CC direction.

[0085] Please see Figures 2 to 14As shown, in some embodiments, the housing of the control handle includes a main housing 31, which is fitted onto the outer peripheral wall of the proximal end of the main shaft 41. Specifically, the main housing 31 is fitted onto the outer peripheral wall of the entire fixed section 411 and onto a portion of the outer peripheral wall of the extension section 412, the proximal end of which is located within the main housing 31. Furthermore, the proximal end of the rotating cylinder 43 is rotatably disposed inside the main housing 31, while a knob 44 fitted onto the rotating cylinder 43 is located on the distal end side of the main housing 31.

[0086] Please see Figures 12 to 14 As shown, in some embodiments, the main shell 31 includes an upper shell 311 and a lower shell 312, which are spliced ​​together and then fitted onto the outer peripheral wall of the near end of the main shaft 41.

[0087] In some embodiments, the upper shell 311 has a downwardly extending pin 3111 protruding inside. Meanwhile, the lower shell 312 has a pin hole 3121 that mates with the pin 3111. When the upper shell 311 and lower shell 312 are joined together, the pin 3111 can be properly engaged in the pin hole 3121, thereby axially limiting the relative positioning of the upper shell 311 and lower shell 312 and preventing axial misalignment during the joining process.

[0088] In some embodiments, the upper shell 311 is provided with a plurality of pins 3111, which are arranged at intervals. Correspondingly, the lower shell 312 is provided with a plurality of pin holes 3121, which are arranged in a one-to-one correspondence with the plurality of pins 3111.

[0089] It should be noted that in some embodiments, the pin 3111 may also be located within the lower housing 312, and the pin 3111 extends upward. Correspondingly, the pin hole 3121 may be located within the upper housing 311.

[0090] Please see Figures 2 to 14 As shown, in some embodiments, at least one circumferential limiting rib 4111 protrudes from the outer wall of the fixed section 411 of the main shaft 41. The circumferential limiting rib 4111 is elongated and extends along the axial direction of the fixed section 411. Simultaneously, the main housing 31 is provided with a positioning groove 313 that mates with the circumferential limiting rib 4111. When the main housing 31 is fitted onto the outer peripheral wall of the main shaft 41, the circumferential limiting rib 4111 engages within the positioning groove 313, restricting the rotation of the circumferential limiting rib 4111 through the positioning groove 313, thereby restricting the circumferential rotation of the main shaft 41 relative to the main housing 31, i.e., restricting the circumferential degree of freedom of the main shaft 41.

[0091] It should be noted that multiple circumferential limiting ribs 4111 can be provided. The multiple circumferential limiting ribs 4111 are arranged circumferentially at intervals on the outer peripheral wall of the main shaft 41. Correspondingly, the main shell 31 is provided with positioning grooves 313 that correspond to and cooperate with the multiple circumferential limiting ribs 4111, so that the multiple circumferential limiting ribs 4111 and the multiple positioning grooves 313 are engaged one-to-one.

[0092] In some embodiments, at least one axial limiting rib 4112 protrudes from the outer wall of the fixed section 411 of the main shaft 41. The axial limiting rib 4112 is annular and circumferentially arranged on the outer peripheral wall of the main shaft 41. Simultaneously, a positioning rib 314, which cooperates with the axial limiting rib 4112, protrudes from the inner wall of the main housing 31. The positioning rib 314 is annular and circumferentially arranged on the inner wall of the main housing 31. When the main housing 31 is fitted onto the outer peripheral wall of the main shaft 41, the axial limiting rib 4112 and the positioning rib 314 abut axially to restrict the axial movement of the main shaft 41 relative to the main housing 31, that is, to restrict the axial degree of freedom of the main shaft 41, thereby fixing the main shaft 41 inside the main housing 31.

[0093] It should be noted that in other embodiments, the axial limiting rib 4112 may also be arc-shaped and arranged around the outer peripheral wall of the main shaft 41. Correspondingly, the positioning rib 314 may also be arc-shaped and arranged around the inner wall of the main shell 31.

[0094] In some embodiments, the positioning groove 313 is formed on the positioning rib 314, thereby causing the circumferential limiting rib 4111 to engage with the positioning rib 314.

[0095] In some embodiments, multiple axial limiting ribs 4112 may be provided, and the multiple axial limiting ribs 4112 are arranged axially at intervals on the outer peripheral wall of the main shaft 41. Correspondingly, multiple positioning ribs 314 may also be provided, and the multiple positioning ribs 314 are arranged axially at intervals on the inner sidewall of the main shell 31. Some positioning ribs 314 are engaged with the proximal side of the axial limiting ribs 4112, and some positioning ribs 314 are engaged with the distal side of the axial limiting ribs 4112.

[0096] It should be noted that the positioning rib 314 and the positioning groove 313 can be provided on the inner wall of the upper shell 311, or on the inner wall of the lower shell 312, or on the inner walls of both the upper shell 311 and the lower shell 312.

[0097] Please see Figures 2 to 12As shown, in some embodiments, a first extension 3112 protrudes from the distal end face of the upper shell 311, and a second extension 3122 protrudes from the distal end face of the lower shell 311. When the upper shell 311 and the lower shell 311 are joined together, the first extension 3112 and the second extension 3122 form an annular structure, the outer diameter of which is smaller than the outer diameters of the upper shell 311 and the lower shell 311. Simultaneously, an annular locking groove 443 is recessed into the inner wall of the proximal end of the rotating wheel 441 or the rubber wheel 442. Both the first extension 3112 and the second extension 3122 extend into and are arranged in the locking groove 443, thereby allowing the proximal end of the rotating wheel 441 or the rubber wheel 442 to be fitted around the outer periphery of the first extension 3112 and the second extension 3122, thus restricting the radial degrees of freedom of the upper shell 311 and the lower shell 311 through the locking groove 443 of the rotating wheel 441 or the rubber wheel 442.

[0098] Please see Figures 1 to 4 As shown, in some embodiments, the housing of the control handle further includes a front housing 32, which is fitted onto the outer peripheral wall of the distal end of the extension 412 of the main shaft 41. The front housing 32 and the main housing 31 are axially spaced apart, and the knob 44 is located between the distal end of the main housing 31 and the proximal end of the front housing 32. The distal end of the rotating cylinder 43 is rotatably disposed inside the front housing 32. Therefore, when the knob 44 is rotated, the knob 44 can drive the rotating cylinder 43 to rotate inside the main housing 31 and the front housing 32, thereby driving the sliding sleeve 42 to move axially relative to the extension 412 of the main shaft 41.

[0099] In some embodiments, the proximal end face of the rotating cylinder 43 abuts against the inner wall of the main shell 31, and the distal end face of the rotating cylinder 43 abuts against the inner wall of the front shell 32, so as to axially limit the rotating cylinder 43, thereby limiting the rotating cylinder 43 to rotate between the main shell 31 and the front shell 32 and preventing the rotating cylinder 43 from moving axially relative to the extension 412 of the main shaft 41.

[0100] Please see Figures 2 to 11 As shown, in some embodiments, a plurality of support ribs 453 protrude from the outer peripheral wall of the front axle portion 45, and the front shell 32 is fitted onto the plurality of support ribs 453, thereby fixing the front shell 32 to the distal end of the main shell 31. The support ribs 453 are used to restrict the circumferential degree of freedom of the front shell 32, that is, to restrict the front shell 32 from rotating.

[0101] In some embodiments, the front axle portion 45 includes a connecting portion 454 protruding from its distal end, and the outer peripheral wall of the connecting portion 454 is provided with external threads. A front cover 33 is also provided at the distal end of the front housing 32, and the front cover 33 is threaded onto the connecting portion 454 to lock the front housing 32 onto the outer peripheral wall of the front axle portion 45, thereby restricting the axial degree of freedom of the front housing 32. Furthermore, the outer sheath tube 1 extends from the front axle portion 45, passes through the axis of the front cover 33, and extends distally.

[0102] Please see Figure 2As shown, in some embodiments, the distal end of the front cover 33 is provided with a soft rubber nozzle 34, which is made of a flexible material. The proximal end of the outer sheath 1 passes through the center of the soft rubber nozzle 34 and extends into the interior of the front shaft portion 45 and the main shaft 41. Therefore, when the operator holds the control handle, the distal end of the control handle can make flexible contact with the outer sheath 1 through the soft rubber nozzle 34. When the outer sheath 1 is bent, the soft rubber nozzle 34 can effectively prevent the distal end of the control handle from damaging the outer sheath 1, while also making the distal end of the control handle more aesthetically pleasing.

[0103] Figure 15 yes Figure 2 A schematic diagram of the structure of the inner and outer sheaths 1, three-way valve 51, sealing gasket 52, three-way assembly 55, sealing cap 53 and pressure cap 54. Figure 16 yes Figure 15 Sectional view along the DD direction. Figure 17 yes Figure 15 Sectional view of region E in the middle.

[0104] Please see Figures 15 to 17 and combined Figure 1 and Figure 2 As shown, the sealing module is located within the proximal end of the housing and is connected to the proximal end of the main shaft 41. The sealing module is used to create a pressure-maintaining environment with the outer sheath 1 and the patient's vein. The sealing module mainly includes a three-way valve 51, a sealing gasket 52, a sealing cap 53, and a three-way assembly 55.

[0105] The three-way valve 51 has a valve chamber 510 inside, and a first connector 511, a second connector 512, and a third connector 513 on the outside. The first connector 511 is located at the far end of the three-way valve 51, the proximal end of the main shaft 41 is sleeved on the first connector 511, and the proximal end of the outer sheath tube 1 is inserted and fixed inside the first connector 511, that is, the proximal end of the outer sheath tube 1 is connected to the valve chamber 510.

[0106] In some embodiments, the first connector 511 is provided with an axially extending adhesive hole 514, which communicates with the valve cavity 510. The proximal end of the outer sheath tube 1 is inserted into and fixed in the adhesive hole 514.

[0107] In some embodiments, the diameter of the adhesive hole 514 gradually increases in the direction from the proximal end to the distal end. Therefore, the proximal end of the outer sheath 1 can be glued into the adhesive hole 514 by means of adhesive, allowing more adhesive to flow between the outer wall of the proximal end of the outer sheath 1 and the inner wall of the adhesive hole 514, ensuring a gapless seal at the joint.

[0108] Please see Figures 15 to 17As shown, the second connector 512 is located near the three-way valve 51, and is axially opposite to the first connector 511. The second connector 512 has a sealing cavity 515 located near the valve cavity 510. A sealing gasket 52 is located within the sealing cavity 515, which seals the sealing cavity 515 and thus the near end of the valve cavity 510. A perforation (not shown) is located at the axial center of the sealing gasket 52, axially opposite to the outer sheath 1. The ablation device can enter the valve cavity 510 through the perforation and then through the valve cavity 510 into the outer sheath 1.

[0109] In some embodiments, recessed grooves (not shown in the figure) are respectively provided on both axial sides of the sealing gasket 52, and a perforation is provided at the center of the recessed groove. When the ablation device passes through the sealing gasket 52 through the perforation, the sealing gasket 52 can undergo axial deformation in the recessed groove to maintain the sealing performance of the sealing gasket 52 at the perforation.

[0110] In some embodiments, the sealing gasket 52 has cross-shaped grooves (not shown) recessed on both axial sides, and the two cross-shaped grooves are respectively arranged around the periphery of the perforation. The centers of the two cross-shaped grooves are respectively connected to the perforation, and the two cross-shaped grooves are not connected to each other, that is, the sealing gasket 52 does not cut through the two cross-shaped grooves. When the ablation device passes through the sealing gasket 52 through the perforation, the sealing gasket 52 deforms axially, the cross-shaped groove on one side of the sealing gasket 52 becomes smaller, and the cross-shaped groove on the other side of the sealing gasket 52 becomes larger, thereby smoothly guiding the ablation device through the perforation and reducing the resistance of the ablation device to pierce the sealing gasket 52.

[0111] In some embodiments, the radial dimension of the sealing gasket 52 is slightly larger than the dimension of the sealing cavity 515. Therefore, when the sealing gasket 52 is installed in the sealing cavity 515, the entire sealing gasket 52 can be in a state of mutual compression towards the center, ensuring that when the ablation device passes through the sealing gasket 52, the sealing gasket 52 around the perforation is in a state of compression towards the center of the ablation device, thereby ensuring the sealing performance of the sealing gasket 52 at the perforation.

[0112] In some embodiments, a sealing cap 53 is fitted onto the second connector 512, and a through hole 531, coaxial with the perforation, is provided at the axial center of the sealing cap 53. When the sealing cap 53 is fitted onto the second connector 512, the sealing cap 53 abuts against the sealing gasket 52, thereby causing the sealing gasket 52 to seal the sealing cavity 515. At the same time, the through hole 531 can communicate with the perforation, allowing the ablation device to enter the valve cavity 510 sequentially through the through hole 531 and the perforation, and then enter the outer sheath 1 through the valve cavity 510.

[0113] In some embodiments, the sealing module further includes a pressure cap 54, which is disposed in the sealing cavity 515 within the second connector 512 and between the sealing cover 53 and the sealing gasket 52. A through hole 541 is provided at the axial center of the pressure cap 54, with both ends of the through hole 541 axially opposite and communicating with the through hole 531 and the perforation, respectively. When the sealing cover 53 is fitted onto the second connector 512, the sealing cover 53 abuts against the pressure cap 54, allowing the pressure cap 54 to compress the sealing gasket 52, thereby sealing the sealing cavity 515. Simultaneously, the through hole 531, the through hole 541, and the perforation are sequentially connected, allowing the ablation device to sequentially enter the valve cavity 510 through the through hole 531, the through hole 541, and the perforation, and then enter the outer sheath 1 through the valve cavity 510.

[0114] Please see Figures 15 to 17 As shown, the third connector 513 protrudes from the peripheral wall of the three-way valve 51. The interior of the third connector 513 is connected to the valve cavity 510, and the third connector 513 is used to connect the three-way assembly 55. The three-way assembly 55 can be used to connect to the patient's vein, thereby forming a pressure-maintaining environment between the three-way valve 51, the outer sheath 1, and the patient's vein.

[0115] In some embodiments, the outer periphery of the third connector 513 is provided with a insertion groove 516, which is annular and arranged around the periphery of the third connector 513. One connecting end of the tee assembly 55 is sleeved on the third connector 513 and inserted and fixed in the insertion groove 516, thereby connecting the interior of the tee assembly 55 with the valve cavity 510. This connecting end can be glued and fixed to the third connector 513.

[0116] In some embodiments, the diameter of the third connector 513 gradually decreases in the direction away from the axis of the three-way valve 51. Therefore, when one end of the three-way assembly 55 is fitted onto the third connector 513, the opening of that end can be gradually enlarged, thereby improving the structural strength of the adhesive bond and ensuring that the seal is airtight.

[0117] Please see Figure 1 and Figure 2 As shown, in some embodiments, the housing also includes a tail cap 35 located near the end of the main housing 31. The tail cap 35 is threaded onto the near end of the main housing 31 and encapsulates the sealing cap 53 inside the main housing 31.

[0118] Figure 18 yes Figure 3 A schematic diagram of the structure of the central spindle 41 and the sliding sleeve 42 in another embodiment. Figure 19 yes Figure 18 A schematic diagram of the structure of the middle sliding sleeve 42. Figure 20 Figure 18 A schematic diagram of the assembly of the central spindle 41 and the sliding sleeve 42 with the front shaft part 45 and the outer sheath tube 1.

[0119] Please see Figure 18 and Figure 20 As shown, in some embodiments, the end face of the fixed section 411 connected to the extension section 412 is provided with two return holes 413 arranged axially opposite to the traction hole 423. Both return holes 413 extend from the distal end of the fixed section 411 to the proximal end, and the proximal ends of the two return holes 413 are interconnected. Therefore, the proximal end of the traction wire 2 can pass through the traction hole 423, enter from the distal end of the traction hole 423 and exit from the proximal end of the traction hole 423, extending the traction wire 2 to the distal end face of the fixed section 411, entering through one return hole 413 and exiting through the other return hole 413, then passing back through the traction hole 423, entering from the proximal end of the traction hole 423 and exiting from the distal end of the traction hole 423, finally fixing the traction wire 2 to the second positioning post 425. The second positioning post 425 is located on the side of the sliding sleeve 42 near the traction hole 423.

[0120] When the rotating cylinder 43 rotates in the forward direction relative to the main shaft 41 and drives the sliding sleeve 42 to move towards the proximal end of the extension section 412, part of the traction wire 2 that passes through the return hole 413 is loosened, thereby loosening the distal end of the traction wire 2, so that the distal end of the traction wire 2 can move towards the distal end of the outer sheath tube 1, and the curvature of the distal end of the outer sheath tube 1 gradually decreases.

[0121] When the rotating cylinder 43 rotates in the opposite direction to the main shaft 41 and drives the sliding sleeve 42 to move towards the distal end of the extension section 412, the traction wire 2 that passes through the return hole 413 can move with the sliding sleeve 42 towards the distal end of the extension section 412, thereby tightening the traction wire 2 and driving the distal end of the traction wire 2 to move towards the proximal end of the outer sheath tube 1, causing the distal end of the outer sheath tube 1 to bend or the degree of bending to increase.

[0122] In some embodiments, the proximal end of the traction wire 2 has a flexible segment, which can be made of the flexible material of suture thread. The proximal end of the traction wire 2 passes through the flexible segment into and out of the two return holes 413 respectively, then passes through the traction hole 423 in the opposite direction, enters from the proximal end of the traction hole 423 and exits from the distal end of the traction hole 423, and finally fixes the flexible segment to the second positioning post 425. Therefore, by utilizing the flexible material of the flexible segment, the traction wire 2 can bend and move smoothly at the two return holes 413.

[0123] Figure 21 Figure 20 Sectional view from the FF direction.

[0124] Please see Figure 18 and Figure 21As shown, in some embodiments, the sliding sleeve 42 is provided with two traction holes 423, namely a first traction hole 423a and a second traction hole 423b, which are arranged circumferentially spaced on the sliding sleeve 42. Two return holes 413 are arranged axially opposite to the second traction hole 423b. Simultaneously, two traction wires 2 are provided, namely a first traction wire 2a and a second traction wire 2b. The distal end of the first traction wire 2a is connected to one side of the distal end of the outer sheath tube 1, and the distal end of the second traction wire 2b is connected to the other side of the distal end of the outer sheath tube 1. The proximal end of the first traction wire 2a can pass through the first traction hole 423a and be fixed to a first positioning post 424 at the proximal end of the sliding sleeve 42. The proximal end of the second traction wire 2b can pass through the second traction hole 423b and extend to the distal end face of the fixed section 411. It enters through a folding hole 413 and exits through another folding hole 413. After passing through the second traction hole 423b in the opposite direction, it is finally fixed to a second positioning post 425 at the distal end of the sliding sleeve 42.

[0125] When the rotating cylinder 43 rotates forward relative to the main shaft 41 and drives the sliding sleeve 42 to move towards the proximal end of the extension section 412, the sliding sleeve 42 tightens the first traction wire 2a, allowing the distal end of the first traction wire 2a to move towards the proximal end of the outer sheath tube 1, tightening one side of the distal end of the outer sheath tube 1; at the same time, the sliding sleeve 42 releases the second traction wire 2b, allowing the distal end of the second traction wire 2b to move towards the distal end of the outer sheath tube 1, releasing the other side of the distal end of the outer sheath tube 1, thereby causing the distal end of the outer sheath tube 1 to bend towards one side of the first traction wire 2a.

[0126] When the rotating cylinder 43 rotates in the opposite direction to the main shaft 41 and drives the sliding sleeve 42 to move toward the distal end of the extension section 412, the sliding sleeve 42 releases the first traction wire 2a, allowing the distal end of the first traction wire 2a to move toward the distal end of the outer sheath tube 1, thus releasing one side of the distal end of the outer sheath tube 1; at the same time, the sliding sleeve 42 tightens the second traction wire 2b, allowing the distal end of the second traction wire 2b to move toward the proximal end of the outer sheath tube 1, tightening the other side of the distal end of the outer sheath tube 1, thereby causing the distal end of the outer sheath tube 1 to bend toward one side of the second traction wire 2b.

[0127] In some embodiments, the first traction hole 423a and the second traction hole 423b are radially symmetrically disposed on the sliding sleeve 42. Correspondingly, the distal ends of the first traction wire 2a and the second traction wire 2b are respectively connected to the opposite sides of the distal end of the outer sheath tube 1, thereby adjusting the curvature of the distal end of the outer sheath tube 1 towards the opposite sides.

[0128] It should be noted that in other embodiments, the distance between the first traction hole 423a and the second traction hole 423b, as well as the included angle relative to the center of the sliding sleeve 42, can be adjusted as needed, and no limitation is imposed here.

[0129] It should also be noted that in some other embodiments, the two return holes 413 are arranged axially opposite to the first traction hole 423a. Alternatively, two sets of return holes 413 can be provided, each set of return holes 413 including two adjacent return holes 413, one set of return holes 413 being arranged axially opposite to the first traction hole 423a, and the other set of return holes 413 being arranged axially opposite to the second traction hole 423b.

[0130] In some embodiments, the sliding sleeve 42 has two sets of first positioning posts 424 and second positioning posts 425 at both ends of its axial direction. One set of first positioning posts 424 and second positioning posts 425 is located on the side of the sliding sleeve 42 near the first traction hole 423a and is located at both ends of the first traction hole 423a in the axial direction. The other set of first positioning posts 424 and second positioning posts 425 is located on the side of the sliding sleeve 42 near the second traction hole 423b and is located at both ends of the second traction hole 423b in the axial direction.

[0131] In some embodiments, only one of the first positioning post 424 and the second positioning post 425 may be provided. The first positioning post 424 protrudes from the side of the near end of the sliding sleeve 42 near the first traction hole 423a, and the second positioning post 425 protrudes from the side of the far end of the sliding sleeve 42 near the second traction hole 423b, so that the first positioning post 424 and the second positioning post 425 are arranged diagonally, and the second positioning post 425, the second traction hole 423b and the corresponding set of return holes 413 are arranged axially opposite each other.

[0132] Figure 22 yes Figure 21 A schematic diagram of the structure in another embodiment.

[0133] Please see Figure 18 and Figure 22 As shown, in some embodiments, the proximal end of the extension 412 of the main shaft 41 is provided with a second through-hole 414, and the outer wall of the outer sheath 1 is provided with a second wire outlet hole 12 arranged opposite to the second through-hole 414. The distal end of the traction wire 2 extends into the conveying channel arranged inside the outer sheath 1, and the proximal end of the traction wire 2 extends out of the outer sheath 1 from the second wire outlet hole 12, and extends out of the outside of the proximal end of the extension 412 from the second through-hole 414, and then passes through the traction hole 423 of the sliding sleeve 42 in the opposite direction, and is fixed on a second positioning post 425 at the distal end of the sliding sleeve 42.

[0134] When the rotating cylinder 43 rotates in the forward direction relative to the main shaft 41 and drives the sliding sleeve 42 to move towards the proximal end of the extension section 412, the traction wire 2 extending through the second through-hole 414 is loosened, thereby loosening the distal end of the traction wire 2, so that the distal end of the traction wire 2 can move towards the distal end of the outer sheath tube 1, and the curvature of the distal end of the outer sheath tube 1 gradually decreases.

[0135] When the rotating cylinder 43 rotates in the opposite direction to the main shaft 41 and drives the sliding sleeve 42 to move toward the distal end of the extension section 412, the traction wire 2 extending through the second through-hole 414 can move with the sliding sleeve 42 toward the distal end of the extension section 412, thereby tightening the traction wire 2 and driving the distal end of the traction wire 2 to move toward the proximal end of the outer sheath tube 1, causing the distal end of the outer sheath tube 1 to bend or the degree of bending to increase.

[0136] In some embodiments, the second through-hole 414 is arranged close to two return holes 413, with the two return holes 413 located on the proximal side of the second through-hole 414. After the proximal end of the traction wire 2 extends out of the outer sheath 1 from the second wire outlet 12, it can pass through one return hole 413, exit through the other return hole 413, and then pass in the opposite direction through the traction hole 423 of the sliding sleeve 42 before being fixed to a second positioning post 425 at the distal end of the sliding sleeve 42. Therefore, the sliding sleeve 42 can engage with the second through-hole 414 through the return hole 413 to pull the proximal end of the traction wire 2 at a small angle, effectively preventing damage to the surface of the outer sheath 1 due to pulling the traction wire 2 at a large angle.

[0137] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A delivery device for interventional therapy, characterized in that, include: An outer sheath tube having a delivery channel formed therein, the distal end of which is flexible and bendable; A traction wire is disposed within the conveying channel, and the distal end of the traction wire is connected to the distal end of the outer sheath. Control handle, including: A spindle includes a fixed section and an extension section connected axially, the extension section being located at the distal end of the fixed section, and the shaft diameter of the extension section being smaller than the shaft diameter of the fixed section. A sliding sleeve is slidably fitted onto the extension section and limited to slide axially on the extension section; the outer side wall of the sliding sleeve is provided with external threads; A rotating cylinder is rotatably fitted onto the outer peripheral wall of the extension section and the sliding sleeve. The inner wall of the rotating cylinder is provided with an internal thread, and the internal thread of the rotating cylinder is threadedly connected to the external thread of the sliding sleeve. The proximal end of the outer sheath passes through the main shaft, and the proximal end of the traction wire extends out of the outer sheath and is connected to the sliding sleeve; the sliding sleeve is provided with a traction hole that passes through the sliding sleeve axially, and the proximal end of the traction wire passes through the traction hole. There are two traction wires, namely the first traction wire and the second traction wire. The proximal end of the sliding sleeve is provided with a first positioning post, and the proximal end of the first traction wire can pass through the traction hole and be fixed on the first positioning post; when the sliding sleeve slides axially toward the proximal end of the extension section, the first positioning post can abut against the fixed section. The distal end of the sliding sleeve is provided with a second positioning post; the end face of the fixed section connected to the extension section is provided with two return holes arranged axially opposite to the traction hole, and the proximal ends of the two return holes are connected to each other; the proximal end of the second traction wire can pass through the traction hole, enter through one of the return holes, and exit through the other return hole, and then pass through the traction hole in the opposite direction and be fixed on the second positioning post. When the rotating cylinder rotates in the forward or reverse direction relative to the main shaft, the rotating cylinder can drive the sliding sleeve to move axially towards the proximal or distal end, so that the sliding sleeve can tighten the first traction wire while releasing the second traction wire, or release the first traction wire while tightening the second traction wire, so as to adjust the curvature of the distal end of the outer sheath by adjusting the tightness of the first traction wire and the second traction wire.

2. The conveying device as described in claim 1, characterized in that, The outer peripheral wall of the extension section is provided with an axially extending slide rail, and the inner peripheral wall of the sleeve is provided with a limiting groove that slides with the slide rail; or, the inner peripheral wall of the sleeve is provided with an axially extending slide rail, and the outer peripheral wall of the extension section is provided with a limiting groove that slides with the slide rail. When the sliding sleeve is fitted onto the extension section, the slide rail can slide into the limiting groove.

3. The conveying device as described in claim 1, characterized in that, The rotating cylinder has a long, cylindrical structure and is arranged along the axial direction of the main shaft; The axial length of the rotating cylinder is greater than or equal to the axial length of the extension section, and the rotating cylinder completely covers the extension section, so that the sliding sleeve can slide axially over the entire extension section.

4. The conveying device as described in claim 1, characterized in that, The control handle also includes a front axle portion, which is coaxially disposed on the distal end side of the extension section, and the proximal end of the front axle portion is detachably connected to the distal end of the extension section. When the sliding sleeve slides axially toward the distal end of the extension, the sliding sleeve can abut against the front axle portion; When the sliding sleeve slides axially toward the proximal end of the extension section, the sliding sleeve can abut against the fixed section.

5. The conveying device as described in claim 4, characterized in that, The front axle portion includes a cannula protruding from its proximal end; The spindle has an axially extending cavity at its center, and the cavity is located within the fixed section and the extending section. The cannula can be inserted into the shaft cavity at the distal end of the extension section to fix the front shaft portion at the distal end of the extension section.

6. The conveying device as described in claim 5, characterized in that, The outer peripheral wall of the cannula is provided with a locking protrusion, and the peripheral side wall of the extension section is provided with a locking slot that communicates with the shaft cavity. When the cannula is inserted into the shaft cavity at the distal end of the extension section, the locking protrusion can be aligned and engaged with the locking slot to fix the cannula in the shaft cavity at the distal end of the extension section.

7. The conveying device as described in claim 6, characterized in that, An axially extending clearance groove is recessed on the inner wall of the shaft cavity at the distal end of the extension section. The distal end of the clearance groove extends to the distal end of the extension section; The bayonet is located on one side of the near end of the clearance groove and is connected to the clearance groove; When the cannula is inserted into the shaft cavity at the distal end of the extension section, the locking protrusion can move along the clearance groove to the proximal end of the clearance groove and then lock into the bayonet.

8. The conveying device as described in claim 5, characterized in that, The proximal end of the outer sheath penetrates the front shaft portion and extends into the shaft cavity; The outer wall of the front axle is provided with a first through-hole, which is located at the distal end of the insertion tube. The outer sheath is provided with a first wire outlet hole arranged opposite to the first through-hole. The distal end of the traction wire extends into the interior of the outer sheath, and the proximal end of the traction wire extends out of the outer sheath from the first wire exit hole and out of the exterior of the front shaft from the first through-hole, and then connects to the sliding sleeve.

9. The conveying device as claimed in claim 1, characterized in that, The sliding sleeve is provided with two traction holes, which are located on opposite sides of the sliding sleeve; The two reversing holes and one traction hole are arranged axially opposite to each other. The traction wire is provided in two parts. The proximal end of one traction wire can pass through one traction hole and be fixed on the first positioning post. The proximal end of the other traction wire can pass through another traction hole, enter through one folding hole, exit through another folding hole, and then pass through another traction hole in the opposite direction before being fixed on the second positioning post.

10. The conveying device as claimed in claim 9, characterized in that, The first positioning post is located on the proximal end of the sliding sleeve, near one of the traction holes, and the second positioning post is located on the distal end of the sliding sleeve, near the other traction hole.

11. The conveying device as claimed in claim 1, characterized in that, The proximal end of the extension section is provided with a second through-hole, and the outer sheath is provided with a second wire outlet hole arranged opposite to the second through-hole; the distal end of the sliding sleeve is provided with a second positioning post. The distal end of the second traction wire extends into the interior of the outer sheath, and the proximal end of the second traction wire extends out of the outer sheath from the second wire exit hole and extends out of the proximal end of the extension section from the second through-hole, then passes through the traction hole in the opposite direction and is fixed on the second positioning post.

12. The conveying device as claimed in claim 11, characterized in that, After the proximal end of the second traction wire extends out of the outer sheath from the second wire outlet hole, it can pass through one of the folding holes, exit through another folding hole, and then pass through the traction hole in the opposite direction before being fixed on the second positioning post.

13. The conveying device as claimed in claim 4, characterized in that, The control handle also includes a knob, which is ring-shaped and sleeved on the outer peripheral wall of the rotating cylinder. The knob is used to drive the rotating cylinder to rotate in the forward or reverse direction relative to the extension section.

14. The conveying device as claimed in claim 13, characterized in that, The outer peripheral wall of the rotary cylinder is provided with an axially extending transmission rib, and the inner annular sidewall of the knob is provided with a transmission groove that cooperates with the transmission rib. The transmission groove is arranged along the axial direction. Alternatively, the outer peripheral wall of the rotary cylinder is recessed with an axially extending transmission groove, and the inner annular sidewall of the knob is provided with a transmission rib that cooperates with the transmission groove, and the transmission rib is arranged axially. When the knob is fitted onto the outer peripheral wall of the cylinder, the transmission rib is engaged in the transmission groove so that the knob and the cylinder can rotate synchronously.

15. The conveying device as claimed in claim 14, characterized in that, The knob includes a rotary wheel and a rubber wheel; The rotating wheel is sleeved on the outer peripheral wall of the rotating cylinder, and the transmission groove or the transmission rib is provided on the inner side wall of the rotating wheel; The rubber wheel is fitted onto the outer circumference of the rotating wheel, and the outer circumferential wall of the rubber wheel is provided with anti-slip texture.

16. The conveying device as claimed in claim 13, characterized in that, The control handle also includes a main housing, which is sleeved on the outer peripheral wall of the fixed section, and the proximal end of the extension section is located inside the main housing; The proximal end of the rotating cylinder is rotatably disposed inside the main housing, and the knob is disposed on the distal end of the main housing.

17. The conveying device as claimed in claim 16, characterized in that, The outer wall of the fixed section is provided with an axially extending circumferential limiting rib. The main shell is provided with a positioning groove that cooperates with the circumferential limiting rib; When the main shell is fitted onto the outer peripheral wall of the fixed section, the circumferential limiting rib is engaged in the positioning groove to restrict the main shaft from rotating circumferentially relative to the main shell.

18. The conveying device as claimed in claim 17, characterized in that, The outer wall of the fixed section is provided with axial limiting ribs arranged in a circumferential manner; The main shell is provided with circumferentially arranged positioning ribs, and the positioning groove is provided on the positioning ribs; When the main shell is fitted onto the outer peripheral wall of the fixed section, the axial limiting rib and the positioning rib abut against each other axially to restrict the main shaft from moving axially relative to the main shell.

19. The conveying device as claimed in claim 16, characterized in that, The control handle also includes a front housing, which is fitted onto the outer peripheral wall of the distal end of the extension. The distal end of the rotating cylinder is rotatably disposed inside the front shell, and the knob is disposed between the distal end of the main shell and the proximal end of the front shell. The proximal end face of the rotating cylinder abuts against the inner wall of the main shell, and the distal end face of the rotating cylinder abuts against the inner wall of the front shell, so that the rotating cylinder is axially limited between the main shell and the front shell.

20. The conveying device as claimed in claim 19, characterized in that, The front axle portion includes a connecting portion protruding from its distal end, and the outer peripheral wall of the connecting portion is provided with external threads; The front housing is further provided with a front cover on its distal end. The front cover is threaded onto the connecting part to lock the front housing onto the outer peripheral wall of the front axle.

21. The conveying device as claimed in claim 20, characterized in that, The distal end of the front cover is provided with a soft rubber nozzle; the proximal end of the outer sheath passes through the center of the soft rubber nozzle and extends sequentially into the front shaft and the main shaft.

22. The conveying device according to any one of claims 1-21, characterized in that, The control handle also includes a three-way valve, which has a first connector, a second connector, and a third connector; The first connector is located at the distal end of the three-way valve, and the proximal end of the outer sheath is inserted and fixed inside the first connector. The second connector is located at the proximal end of the three-way valve. The second connector is axially opposite to the first connector. The second connector has a sealing cavity inside. The sealing cavity has a sealing gasket inside. The sealing gasket has a through hole at its axial center. The through hole is axially opposite to the outer sheath. The third connector protrudes from the peripheral sidewall of the three-way valve and is connected to the three-way assembly.

23. The conveying device as claimed in claim 22, characterized in that, The first joint has an axially extending adhesive hole, the proximal end of the outer sheath is inserted into the adhesive hole, and the diameter of the adhesive hole gradually increases from the proximal end to the distal end.

24. The conveying device as claimed in claim 22, characterized in that, The third connector has a plug groove on its outer periphery, and the plug groove is annular and arranged around the periphery of the third connector. One end of the tee assembly is sleeved on the third connector and inserted and fixed in the insertion slot; The diameter of the third connector gradually decreases in the direction away from the axis of the three-way valve.

25. The conveying device as claimed in claim 22, characterized in that, The control handle also includes a sealing cover, which is threaded onto the second connector, and the sealing cover has a through hole at its axis that is coaxial with the through hole. When the sealing cap is fitted onto the second connector, the sealing cap abuts against the sealing gasket, so that the sealing gasket seals the sealing cavity.

26. The conveying device as claimed in claim 25, characterized in that, The control handle also includes a pressure cap, which is disposed in the sealing cavity and between the sealing cover and the sealing gasket; the pressure cap has a through hole at its axial center, and the two ends of the through hole are respectively axially opposite to the through hole and the through hole; When the sealing cap is fitted onto the second connector, the sealing cap abuts against the pressure cap, so that the pressure cap can squeeze the sealing gasket, thereby sealing the sealing cavity.

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