Delivery system and handle assembly thereof

Abstract

The utility model provides a conveying system and a handle assembly thereof. The conveying system comprises a catheter and a handle assembly. The handle assembly comprises a handle, a central pipe shaft and a bending control mechanism; the bending control mechanism is mounted on the handle; the central pipe shaft is at least partially arranged in the handle; the bending control mechanism comprises an opening and closing control structure, a rotating structure and a sliding structure which are arranged around the central pipe shaft; the opening and closing control structure controls the two parts of the rotating structure to be opened or closed in the direction perpendicular to the axial direction. The rotating structure is in threaded fit with the sliding structure when closed, and the sliding structure slides towards the near end along the axial direction of the central tube along with rotation of the rotating structure to tighten the bending control wire; when the rotating structure is opened, threaded fit between the rotating structure and the sliding structure is removed, the sliding structure rebounds along with the bending control wire and axially slides at the far end along the central pipe, and the bending control wire is released. The near end of the catheter is inserted into the central tubular shaft and is connected with the central tubular shaft; the bending control wire is connected with the catheter and the sliding structure; according to the configuration, when guiding pipe bending is relieved, operation is convenient, and the operation difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical devices, and in particular to a delivery system of an in-vivo implanted device and a handle assembly thereof. BACKGROUND

[0002] A cardiac pacemaker is an electronic therapeutic instrument implanted in the body, which generates electrical impulses by a pulse generator powered by a battery, and stimulates the myocardium contacted by the electrode through the conduction of the electrode lead to cause the contraction of the heart. The traditional cardiac pacemaker is composed of a pacing lead implanted in the heart and a pulse generator buried under the skin in front of the chest. The leadless pacemaker is a new type of pacemaker integrating the pulse generator and the electrode lead. The leadless pacemaker does not need to be implanted with an electrode lead, nor does it need to make an incision in the chest area. It only needs to be implanted into the heart chamber through a vein in the form of a capsule.

[0003] For the delivery system of the leadless pacemaker, the delivery system implants the leadless cardiac pacemaker into the right ventricle of the patient through a catheter from the femoral vein. The catheter end carries the pacemaker, and the catheter needs to be bent during the implantation process, pass through the tricuspid valve between the right atrium and the right ventricle, and accurately implant the pacemaker into the preset position. Then the catheter and the end pacemaker are separated, the catheter is withdrawn from the body, and the pacemaker is positioned and fixed in the right ventricle. The catheter is under the control of a control wire, which extends from the distal end (i.e. the end) of the catheter to the proximal end. The end part of the catheter is made of elastic material, and the control wire is pulled at the proximal end, so that the end of the catheter deviates to one side. The catheter delivers the pacemaker to the right position, and after withdrawing from the tricuspid valve, the control bending state needs to be released and returned to the original state. At present, the control bending operation basically realizes the axial displacement of the control wire by rotating the sleeve, thereby driving the end of the catheter to deflect. Moreover, during the release of the control bending process, the sleeve also needs to be rotated in the opposite direction, thereby driving the end of the catheter to return to the normal state. This way, not only is time-consuming, inefficient, and complicated to operate, but also increases the difficulty of operation.

[0004] It should be noted that the information disclosed in the background section of the present application is intended to deepen the understanding of the general background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims to provide a delivery system and a handle assembly thereof to solve the problems of time-consuming, low efficiency, complicated operation, and high operation difficulty in releasing the control bending of the catheter of the existing delivery system.

[0006] To achieve the above object, the utility model provides a handle assembly of conveying system, it includes: handle, center tube shaft and control bending mechanism, the control bending mechanism is installed on the handle, the center tube shaft is at least partially arranged in the handle, and with the handle keeps relative fixed, the control bending mechanism includes the open and close control structure, rotation structure and sliding structure around the center tube shaft,

[0007] The open and close control structure is connected with the rotation structure to control two parts of the rotation structure to open or close in the direction perpendicular to the axial direction;

[0008] The rotation structure is screwed with the sliding structure when closing, so that the sliding structure can slide to the proximal end along the center tube shaft with the rotation of the rotation structure to tighten the control bending wire connected with the sliding structure;

[0009] The rotation structure is unscrewed with the sliding structure when opening, so that the sliding structure can slide to the distal end along the center tube shaft with the rebound of the control bending wire to release the control bending wire.

[0010] Optionally, the open and close control structure is slidably arranged on the handle and can rotate synchronously with the rotation structure; the open and close control structure is sleeved outside the rotation structure, and the rotation structure is sleeved with the sliding structure;

[0011] The open and close control structure is configured to control two parts of the rotation structure to close when in the initial position, and the open and close control structure is further configured to control two parts of the rotation structure to open when moving from the initial position to the release position.

[0012] Optionally, the control bending mechanism further comprises a spring sleeved on the center tube shaft, and the spring is arranged at one end of the open and close control structure; one end of the spring is fixed, and the other end of the spring abuts against the open and close control structure;

[0013] During the process that the open and close control structure is driven to move from the initial position to the release position, the spring stores elastic potential energy; after the open and close control structure is released, the spring releases the elastic potential energy to push the open and close control structure to move from the release position to the initial position.

[0014] Optionally, one of the rotation structure and the open and close control structure is provided with symmetrically arranged convex columns, and the other of the rotation structure and the open and close control structure is provided with symmetrically arranged beveled sliding grooves, each convex column is limited in a corresponding beveled sliding groove to slide along the beveled sliding groove, and the beveled sliding groove forms an angle with the axial direction and the direction perpendicular to the axial direction.

[0015] Optionally, the two parts of the rotating structure are each provided with the protruding posts arranged symmetrically, the opening and closing control structure is provided with the oblique sliding grooves arranged symmetrically, and the oblique sliding grooves are in an acute angle with the direction from the proximal end to the distal end in the axial direction; and / or, the opening and closing control structure has two oppositely arranged side walls, the rotating structure is arranged between the two side walls, the oblique sliding groove or the protruding post is arranged on each side wall, the proximal ends of the two side walls are connected and penetrated by the central pipe shaft, and the distal ends of the two side walls are each provided with a lug partially exposed outside the handle, and the lug enables the opening and closing control structure to rotate synchronously with the rotating structure.

[0016] Optionally, the inner thread of the rotating structure is matched with the outer thread of the sliding structure when the rotating structure is closed, the inner thread of the rotating structure is disengaged from the outer thread of the sliding structure when the rotating structure is opened, and the bending control mechanism further comprises a rotating base rotatably arranged on the handle and arranged at the distal end of the opening and closing control structure, the rotating base is connected with the rotating structure and the opening and closing control structure, and the opening and closing control structure and the rotating structure can rotate synchronously with the rotating base.

[0017] Optionally, the thread of the rotating structure and the thread of the sliding structure are each provided with a similar right angle edge, and the similar right angle edge of the thread is located at the distal end of the thread; and / or, a guide structure is arranged between the two parts of the rotating structure, the guide structure comprises a guide pin and a pin hole, the guide pin is arranged on one part of the rotating structure, the pin hole is arranged on the other part of the rotating structure, and the guide pin is aligned with a corresponding one of the pin holes to limit the movement direction of the two parts of the rotating structure when the rotating structure is opened or closed.

[0018] Optionally, the central pipe shaft is provided with the circular metal sliding rods arranged symmetrically, the sliding structure is sleeved on the metal sliding rods to axially slide along the metal sliding rods; and / or, the sliding structure comprises a threaded sliding block and a locking sliding block, the proximal end of the threaded sliding block is provided with the locking sliding block, the locking sliding block is connected with the bending control wire, the inner thread of the rotating structure is matched with the outer thread of the threaded sliding block, and the outer thread of the threaded sliding block has a smaller diameter than the outer diameter of the locking sliding block.

[0019] To achieve the above object, the utility model further provides a conveying system which comprises a catheter and a handle assembly of any one of the conveying systems, the proximal end of the catheter is inserted into the central pipe shaft and connected with the central pipe shaft, and the bending control wire is connected with the catheter and the sliding structure.

[0020] Optionally, the center tube shaft is provided with a wire outlet notch at the position of the proximal end of the catheter for the control bending wire to pass through; and / or, the center tube shaft is of a split structure and comprises a main tube and an extension tube coaxially arranged, the main tube is arranged in the handle, the proximal end of the extension tube is sleeved with the distal end of the main tube, the proximal end of the main tube is connected with the proximal end of the handle, the distal end of the extension tube extends out of the distal end of the handle and is connected with the stress dispersion tube, and the proximal end of the catheter is adhesively fixed with the extension tube and the main tube respectively.

[0021] In the delivery system and the handle assembly thereof provided by the utility model, the handle assembly comprises a handle, a center tube shaft and a control bending mechanism; the control bending mechanism is installed on the handle; the center tube shaft is arranged at least partially in the handle and is kept relatively fixed with the handle; the control bending mechanism comprises an opening and closing control structure, a rotating structure and a sliding structure which are arranged around the center tube shaft; the opening and closing control structure is connected with the rotating structure to control the opening or closing of the two parts of the rotating structure in the direction perpendicular to the axial direction; when the rotating structure is closed, the rotating structure is threadedly matched with the sliding structure, so that the sliding structure can slide towards the proximal end along the center tube shaft with the rotation of the rotating structure to tighten the control bending wire connected with the sliding structure; when the rotating structure is opened, the rotating structure is disengaged from the thread matching with the sliding structure, so that the sliding structure can slide towards the distal end along the center tube shaft with the rebound of the control bending wire to release the control bending wire.

[0022] In this way, when the control bending state of the catheter in the delivery system is released, the user only needs to operate the opening and closing control structure to release the thread matching between the rotating structure and the sliding structure, and when the thread matching between the rotating structure and the sliding structure is released, the rotating structure no longer binds the sliding structure, so that the sliding structure can be automatically reset by the catheter and the control bending wire to realize the rapid return of the catheter, and the rotating structure does not need to be operated in the reverse direction, which avoids the process of operating the rotating structure in the reverse direction, makes the control bending operation more convenient, shortens the operation time, improves the operation efficiency, and reduces the operation difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0023] Those skilled in the art will understand that the provided drawings are for better understanding of the utility model and do not constitute any limitation on the scope of the utility model. Among them:

[0024] Figure 1 The figure is a front view of the structure of the delivery system in an embodiment of the utility model, and only the structure of the proximal end of the catheter is shown. In fact, the catheter should be a relatively long delivery catheter.

[0025] Figure 2 The figure is a front view of the structure of the delivery system in an embodiment of the utility model, and only the structure of the proximal end of the catheter is shown. In fact, the catheter should be a relatively long delivery catheter. Figure 1An isometric view of the delivery system in the middle of the figure;

[0026] Figure 3 An isometric view of the delivery system in the middle of the figure; Figure 1 An isometric view of the delivery system in the middle of the figure;

[0027] Figure 4 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0028] An isometric view of the delivery system in the middle of the figure; Figure 5 An isometric view of the delivery system in the middle of the figure; Figure 4 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0029] An isometric view of the delivery system in the middle of the figure; Figure 6 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0030] An isometric view of the delivery system in the middle of the figure; Figure 7 An isometric view of the delivery system in the middle of the figure; Figure 6 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0031] An isometric view of the delivery system in the middle of the figure; Figure 8 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0032] An isometric view of the delivery system in the middle of the figure; Figure 9 An isometric view of the delivery system in the middle of the figure; Figure 8 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0033] An isometric view of the delivery system in the middle of the figure; Figure 10 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0034] An isometric view of the delivery system in the middle of the figure; Figure 11 An isometric view of the delivery system in the middle of the figure; Figure 10 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0035] An isometric view of the delivery system in the middle of the figure; Figure 12 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0036] An isometric view of the delivery system in the middle of the figure; Figure 13 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0037] An isometric view of the delivery system in the middle of the figure; Figure 14 An isometric view of the delivery system in the middle of the figure; An isometric view of the delivery system in the middle of the figure;

[0038] An isometric view of the delivery system in the middle of the figure; Figure 15This is a schematic diagram of one part of the rotating structure in one embodiment of the present utility model;

[0039] Figure 16 This is a schematic diagram of a rotating base and a rotating structure that achieve synchronous rotation through assembly of a boss and a slot in one embodiment of the present invention.

[0040] Figure 17 This is a schematic diagram of the conveying system in one embodiment of the present invention without the stress diffusion tube installed;

[0041] Figure 18 This is a schematic diagram of the internal structure of the conveying system in one embodiment of the present invention when the system is limited at the far end of the rotating base by an extension rod;

[0042] Figure 19 This is a schematic diagram of the internal structure of the conveying system in one embodiment of the present invention, in which the control bending wire is led out from the proximal end of the guide tube and further extends through the threaded slider and the locking slider for locking connection.

[0043] in,【 Figures 1-19 The annotations in the attached figures are explained as follows:

[0044] 20-Handle assembly, 1-Handle, 101-Distal end face of the handle, 102-Observation window, 110, 120-Two halves of the handle, 2-Center tube shaft, 21-Flange, 22-Cable outlet notch, 210-Extension tube, 211-Annular flange, 220 Main tube, 3-Opening and closing control structure, 31-Slanted slide, 310, 320-Side wall, 32-Lumber, 33-Cavity, 34-Bottom of the cavity, 4-Rotation Structure, 41, 42 - two parts of the rotating structure, 43 - protruding post, 44 - boss, 45 - guide pin, 5 - sliding structure, 51 - threaded slider, 511 - inner hole of the threaded slider, 512 - arc-shaped mating hole of the threaded slider, 52 - locking slider, 6 - spring, 7 - rotating base, 71 - hollow groove, 72 - groove opening, 8 - stress diffusion tube, 9 - metal slide rod, 10 - guide tube, 11 - bending control wire, 12 - gasket. Detailed Implementation

[0045] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.

[0046] As used in the present utility model, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise. The term "plurality" is generally employed in its sense including "at least one" unless the context clearly dictates otherwise. The term "at least two" is generally employed in its sense including "two or more" unless the context clearly dictates otherwise. In addition, the terms "first," "second," "third," etc. are used only to describe a particular feature and do not imply relative importance or an implicit indication of the number of features being referred to. Thus, features limited by "first," "second," "third," etc. can expressly or implicitly include one or at least two of the features. The terms "proximal" and "distal" generally refer to two portions that correspond to each other and do not only include end points. In the context of manual or hand-operated applications, the terms "proximal" and "distal" are defined herein relative to an operator such as a surgeon or clinician. The term "proximal" generally refers to a position closer to the operator, and the term "distal" refers to a position closer to the affected area and thus further away from the operator. In addition, as used in the present utility model, "mounting," "connected," "connection," one element "provided" in another element should be understood broadly, and generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through intermediate elements, and cannot be understood as indicating or implying the spatial positional relationship between the two elements, i.e. one element can be in any orientation inside, outside, above, below or one side of another element, unless the context clearly indicates otherwise. For those of ordinary skill in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as they are shown in the figures, with the upward or upward direction being toward the top of the corresponding figure, and the downward or downward direction being toward the bottom of the corresponding figure.

[0047] In the present application, the term "axial" generally refers to the direction along the central axis of the delivery system and handle assembly, the term "circumferential" generally refers to the direction around the central axis of the delivery system and handle assembly, and the direction perpendicular to the axial direction is "radial".

[0048] The utility model discloses a kind of delivery system and handle assembly thereof, to solve the problem that existing delivery system needs artificial manual operation to operate sleeve when releasing catheter bending control, long time-consuming, low efficiency, operation is complicated, operation difficulty etc.

[0049] Please refer to Figures 1-19The embodiments of the present application provide a delivery system, which comprises a catheter 10 and a handle assembly 20. The proximal end of the catheter 10 is connected with the handle assembly 20. Specifically, as shown in Figure 18 and Figure 19 the proximal end of the catheter 10 is inserted into the central tube shaft 2 of the handle assembly 20 and connected with the central tube shaft 2 in a non-limited manner. The proximal end of the catheter 10 is preferably fixed in the lumen of the central tube shaft 2 by adhesive. The handle assembly 20 specifically comprises a handle 1, a central tube shaft 2 and a bending control mechanism. The bending control mechanism is installed on the handle 1. The central tube shaft 2 is at least partially arranged in the handle 1 and is relatively fixed with the handle 1.

[0050] The bending control mechanism comprises a bending wire 11, which is movably arranged in the catheter 10. Specifically, the bending wire 11 is sequentially connected with the distal end of the catheter 10, the proximal end of the catheter 10 and the sliding structure 5 in the bending control mechanism. That is, one end of the bending wire 11 is connected with the distal end of the catheter 10, and the other end of the bending wire 11 is connected with the sliding structure 5 in the bending control mechanism. When the bending wire 11 is tightened, the distal end (i.e. the tip) of the catheter 10 is bent. When the bending wire 11 is released, the distal end of the catheter 10 returns to the unbent state.

[0051] The bending control mechanism further comprises an opening and closing control structure 3, a rotating structure 4 and a sliding structure 5 arranged around the central tube shaft 2. The sliding structure 5 is directly sleeved on the central tube shaft 2 to axially slide along the central tube shaft 2. In addition, the opening and closing control structure 3 is connected with the rotating structure 4, so that the rotating structure 4 is controlled by the opening and closing control structure 3. The opening and closing control structure 3 is used to control the two parts 41 and 42 of the rotating structure 4 to open or close in the direction perpendicular to the axial direction. The rotating structure 4 thus has a closed state and an open state and can be switched between the closed state and the open state. In actual use, the initial state of the rotating structure 4 is the closed state.

[0052] As shown in Figures 6-7 the rotating structure 4 comprises two parts 41 and 42, which are oppositely arranged in the direction perpendicular to the axial direction. The opening and closing control structure 3 is connected with the two parts 41 and 42 of the rotating structure 4, so that the two parts 41 and 42 of the rotating structure 4 can be operatively moved relative to each other in the direction perpendicular to the axial direction, which includes moving towards each other or moving away from each other, thereby realizing the opening or closing of the rotating structure 4 in the direction perpendicular to the axial direction.

[0053] The rotating structure 4 is threadedly engaged with the sliding structure 5 when closed, enabling the sliding structure 5 to slide proximally along the central tube shaft 2 with rotation of the rotating structure 4 to tighten the control wire 11 connected to the sliding structure 5; conversely, the rotating structure 4 is threadedly disengaged from the sliding structure 5 when opened, enabling the sliding structure 5 to slide distally along the central tube shaft 2 with the springback of the control wire 11 to release the control wire 11. The rotating structure 4 is thus releasably threadedly engaged with the sliding structure 5.

[0054] In practice, the first thread on the rotating structure 4 is engaged with the second thread on the sliding structure 5, one of the first thread and the second thread being an internal thread and the other being an external thread. Preferably, the first thread is an internal thread (i.e. a female thread) and the second thread is an external thread (i.e. a male thread).

[0055] As shown in Figure 14 and Figure 15 , in combination with Figure 3 and Figure 6 , in the embodiment, the rotating structure 4 houses the sliding structure 5, and the internal thread of the rotating structure 4 is engaged with the external thread of the sliding structure 5; in use, the internal thread of the rotating structure 4 is engaged with the external thread of the sliding structure 5 when the rotating structure 4 is closed, and the internal thread of the rotating structure 4 is disengaged from the external thread of the sliding structure 5 when the rotating structure 4 is opened.

[0056] When the rotating structure 4 is engaged with the sliding structure 5, the rotating structure 4 and the sliding structure 5 are in a threadedly engaged state, i.e. in a “meshed” state, in which, if the rotating structure 4 is driven to rotate in a certain direction, the sliding structure 5 can be driven to slide axially along the central tube shaft 2 in the proximal direction of the handle assembly 20, thereby pulling the control wire 11 to tighten and bend the catheter 10.

[0057] When the rotating structure 4 is disengaged from the sliding structure 5, the rotating structure 4 and the sliding structure 5 are in a “non-meshed” state, in which the rotating structure 4 does not need to be rotated in the reverse direction, i.e. the rotating structure 4 is in a non-use state, because the catheter 10 has an automatic recovery ability, and the sliding structure 5 can be driven to slide axially along the central tube shaft 2 in the distal direction of the handle assembly 20 by the automatic recovery force of the catheter 10 to reset.

[0058] With the inner thread of the rotating structure 4 and the outer thread of the sliding structure 5 as an example, when the rotating structure 4 is in the open state, the lowest point of the inner thread of the rotating structure 4 should be higher than the highest point of the outer thread of the sliding structure 5, so that the inner thread of the rotating structure 4 no longer binds the outer thread of the sliding structure 5. Specifically, in the open state, the small diameter of the inner thread of the rotating structure 4 is greater than the large diameter of the outer thread of the sliding structure 5, so that the two do not have an engagement relationship. Therefore, in the open state, the rotating structure 4 no longer binds the sliding structure 5, so that the sliding structure 5 can be freely reset by the catheter 10, realizing the quick straightening of the catheter 10 without the need to operate the rotating structure 4 one circle at a time.

[0059] It should be noted that the rotating structure 4 does not move axially when rotating, that is, it is limited in the axial direction, and can rely on other components for limiting. The specific limiting method is not limited. Similarly, the sliding structure 5 does not move circumferentially when moving, and its circumferential movement is mainly limited by the center tube shaft 2. Generally, the center tube shaft 2 and the sliding structure 5 are limited in the direction of concave-convex cooperation, and the sliding structure 5 is controlled to slide on the center tube shaft 2 in the axial direction.

[0060] As can be seen, when the bending control state of the catheter 10 is released, the user only needs to operate the opening and closing control structure 3 to actuate the opening and closing control structure 3 to release the thread cooperation between the rotating structure 4 and the sliding structure 5. When the thread cooperation between the rotating structure 4 and the sliding structure 5 is released, the rotating structure 4 no longer binds the sliding structure 5, and the sliding structure 5 can be automatically reset by the catheter 10 and the bending control wire 11 without using the rotating structure 4, thereby realizing the quick straightening of the catheter 10. In this way, it is not necessary to operate the rotating structure 4 one circle at a time in the reverse direction, avoiding the process of operating the rotating structure 4 in the reverse direction, making the bending operation more convenient, shortening the operation time and improving the operation efficiency, and reducing the operation difficulty.

[0061] Those skilled in the art should understand that the opening and closing control structure 3 can have different structural forms. For example, Figures 8 to 12As shown, in the preferred embodiment provided by the present application, the opening and closing control structure 3 is slidably arranged on the handle 1 and can rotate synchronously with the rotation structure 4. The opening and closing control structure 3 is arranged to be sleeved on the rotation structure 4. When the bending control state of the catheter 10 needs to be released, the opening and closing control structure 3 is only needed to be axially slid along the handle assembly 20 to cause the two parts 41 and 42 of the rotation structure 4 to open in the direction perpendicular to the axial direction. In the embodiment, the opening and closing control structure 3 has an initial position and a release position and can be switched between the initial position and the release position. When the opening and closing control structure 3 is in the initial position, the two parts 41 and 42 of the rotation structure 4 are controlled to be closed in the direction perpendicular to the axial direction. Conversely, when the opening and closing control structure 3 is operated to move from the initial position to the release position, the two parts 41 and 42 of the rotation structure 4 are controlled to be opened in the direction perpendicular to the axial direction.

[0062] The opening and closing control structure 3 described above can be realized by various mechanical structures understood by those skilled in the art, as long as the axial sliding of the opening and closing control structure 3 can be converted into the opening and closing movement of the rotation structure 4 in the direction perpendicular to the axial direction. For example, in one way, the opening and closing control structure 3 and the rotation structure 4 are matched by a slope, the outer circumferential surface of the rotation structure 4 is a conical surface, and the opening and closing control structure 3 is provided with an inner recessed conical surface. The outer conical surface of the rotation structure 4 matches the inner conical surface of the opening and closing control structure 3. A counterbore is arranged on the joint surface between the two parts 41 and 42 of the rotation structure 4, and a compressible spring is arranged in the counterbore. By axially pushing the opening and closing control structure 3, the inner conical surface of the opening and closing control structure 3 is separated from the outer conical surface of the rotation structure 4. At this time, the spring in the counterbore loses the extrusion of the inner conical surface, and the spring is in a natural elongation state after the force is released, thereby separating the two parts 41 and 42 of the rotation structure 4 in the direction perpendicular to the axial direction. In another way, a closing force is applied to the two parts 41 and 42 of the rotation structure 4 by a spring or other device, so that the rotation structure 4 is always in a closed state. The opening and closing control structure 3 is designed as a special-shaped cam and is arranged on the joint surface between the two parts 41 and 42 of the rotation structure 4. When the short axis of the cam of the opening and closing control structure 3 is parallel to the joint surface, the cam is pressed against the joint surface, and the rotation structure 4 is in a closed state. When the opening and closing control structure 3 is axially pushed, when the long axis of the cam of the opening and closing control structure 3 is parallel to the joint surface, the rotation structure 4 is in an open state.

[0063] In another way, the opening and closing control structure 3 and the rotation structure 4 are matched by a beveled sliding groove 31 and a convex column 43 to realize the opening and closing of the rotation structure 4 in the direction perpendicular to the axial direction. The following is an exemplary description.

[0064] Continuing to refer to Figures 8 to 12In the preferred embodiment provided by the present application, the two parts 41 and 42 of the rotating structure 4 are each provided with protruding posts 43 arranged symmetrically, and the opening and closing control structure 3 is provided with oblique slots 31 arranged symmetrically, each protruding post 43 is limited in a corresponding oblique slot 31 to slide along the oblique slot 31. The oblique slots 31 and the protruding posts 43 are arranged one-to-one. At this time, the axial movement of the opening and closing control structure 3 can be converted into the opening and closing movement of the two parts 41 and 42 of the rotating structure 4 in the direction perpendicular to the axial direction through the relative movement of the oblique slots 31 and the protruding posts 43. This structure is relatively easy to process and realize, and is also more stable and reliable. In specific implementation, the two parts 41 and 42 of the rotating structure 4 are respectively provided with at least two protruding posts 43, and correspondingly, the opening and closing control structure 3 is provided with at least four oblique slots 31. All the oblique slots 31 form an angle with the axial direction and the direction perpendicular to the axial direction, in this way, the axial degree of freedom of the opening and closing control structure 3 is converted into the degree of freedom of the rotating structure 4 in the direction perpendicular to the axial direction, and the oblique slots 31 can also limit the opening and closing size of the rotating structure 4 in the direction perpendicular to the axial direction.

[0065] Further, the oblique slots 31 on the opening and closing control structure 3 are preferably arranged to form an acute angle with the direction from the proximal end to the distal end in the axial direction, so that when the opening and closing control structure 3 slides towards the proximal end of the handle assembly 20, the rotating structure 4 is opened, and when the opening and closing control structure 3 slides towards the distal end of the handle assembly 20, the rotating structure 4 is closed. For the convenience of understanding, an exemplary description is made in the manner of Figures 8 to 11 In this exemplary embodiment, the oblique slots 31 form an acute angle with the direction from the proximal end to the distal end in the axial direction, so that when the opening and closing control structure 3 slides towards the proximal end of the delivery system, the rotating structure 4 is opened. Specifically, as shown in Figure 8 and Figure 9 Initially, the protruding posts 43 on the rotating structure 4 are limited at the proximal end of the oblique slots 31, and the two parts 41 and 42 of the rotating structure 4 are in the closed state. Then, as shown in Figure 10 and Figure 11 When the rotating structure 4 slides towards the proximal end, the protruding posts 43 on the rotating structure 4 are limited at the distal end of the oblique slots 31, and the two parts 41 and 42 of the rotating structure 4 are in the opened state. However, it should be known that in some other cases, the oblique slots 31 can be arranged to form an acute angle with the direction from the distal end to the proximal end in the axial direction, so that when the opening and closing control structure 3 slides towards the distal end of the handle assembly 20, the rotating structure 4 is opened, and when the opening and closing control structure 3 slides towards the proximal end of the handle assembly 20, the rotating structure 4 is closed.

[0066] The opening and closing control structure 3 can actually have various structural forms, such as the structure of a sleeve or the structure of a frame, etc., which are not limited by the present application.

[0067] AsFigure 3 , and Figures 8 to 12 As shown in FIG. 1, in an exemplary embodiment, the opening and closing control structure 3 has two oppositely arranged side walls 310 and 320, which are oppositely arranged along a preset direction. The preset direction is perpendicular to the sliding direction of the sliding structure 5 and the opening and closing direction of the rotating structure 4. Moreover, the rotating structure 4 is arranged between the two side walls 310 and 320. Therefore, the opening and closing control structure 3 can be arranged as a simple frame structure. In this way, each side wall 310 and 320 of the opening and closing control structure 3 is provided with a beveled sliding groove 31, and the beveled sliding grooves 31 on the two side walls 310 and 320 are symmetrically arranged. Alternatively, each side wall 310 and 320 of the opening and closing control structure 3 is provided with a convex column 43.

[0068] As shown in the figure, in the embodiment, the two parts 41 and 42 of the rotating structure 4 are respectively provided with four symmetrically distributed convex columns 43, which are preferably distributed at the proximal end and the distal end of the rotating structure 4, so that the entire rotating structure 4 is balanced in force and stable. Correspondingly, the two side walls 310 and 320 of the opening and closing control structure 3 are respectively provided with four beveled sliding grooves 31. In order to enable the two parts 41 and 42 of the rotating structure 4 to be relatively close or relatively far away, there are beveled sliding grooves 31 with opposite directions on the same side wall 310 and 320, i.e., the direction of the beveled sliding groove 31 matched with the two parts 41 and 42 of the rotating structure 4 is exactly opposite, and the two beveled sliding grooves 31 at the corresponding positions are basically in the shape of an "eight".

[0069] As a variant, the beveled sliding grooves 31 and the convex columns 43 can also be arranged reversely, i.e., the beveled sliding grooves 31 are symmetrically arranged on the two parts 41 and 42 of the rotating structure 4, and the convex columns 43 are symmetrically arranged on the opening and closing control structure 3, which can also achieve basically the same or similar effect.

[0070] It should be noted that although the embodiment is described in combination with the structure of the convex column 43 and the beveled sliding groove 31, it should be understood that other structures capable of converting axial sliding into movement perpendicular to the axial direction can also be used. Therefore, in addition to the opening and closing control structure 3 listed in the drawings, those skilled in the art can also find other alternative ways to achieve the functions / achieve the above effects based on the description in the specification of the present application, not just the scheme disclosed in the embodiment.

[0071] Please refer to Figures 8-12 , in combination with Figures 1-3 , and Figures 16-18, the proximal ends of the two side walls 310 and 320 of the opening and closing control structure 3 can be further connected, and the connection allows the central tube shaft 2 to pass through, so that the central tube shaft 2 can be connected to the proximal end of the handle 1 smoothly. Further preferably, the distal end of each of the two side walls 310 and 320 is provided with a lug 32, and the lugs 32 are arranged substantially symmetrically, and the lugs 32 are partially exposed outside the handle 1 for the user to operate manually. The lugs 32 also serve to enable the opening and closing control structure 3 to rotate synchronously with the rotation of the rotating structure 4.

[0072] Further, please refer to Figure 12 , and Figures 18-19 In the preferred embodiments provided in the present application, the bending control mechanism further comprises a spring 6; the spring 6 is arranged at the proximal end of the opening and closing control structure 3 and is sleeved on the central tube shaft 2; one end of the spring 6 is fixed, and the fixing manner is not limited, such as connecting one end of the spring 6 to the handle 1, or connecting one end of the spring 6 to the central tube shaft 2, etc.; the other end of the spring 6 abuts against the opening and closing control structure 3, and the abutment can be just abutting together or fixedly connected together.

[0073] Based on this, during the process that the opening and closing control structure 3 is driven to move from the initial position to the released position, the spring 6 stores elastic potential energy; after the opening and closing control structure 3 is released, the force acting on the spring 6 is also released at the same time, and the spring 6 releases the elastic potential energy to push the opening and closing control structure 3 to move from the released position to the initial position. In this way, on the one hand, the opening and closing control structure 3 can automatically and quickly return to the initial position, making the operation more convenient and efficient, and on the other hand, the elastic force helps the rotating structure 4 to be kept in the closed state stably, increasing the stability and reliability.

[0074] The spring 6 can be arranged not only at the proximal end of the opening and closing control structure 3, but also at the distal end of the opening and closing control structure 3, and the specific arrangement should be determined according to the moving direction of the opening and closing control structure 3 to open the rotating structure 4. For example, when the opening and closing control structure 3 slides towards the proximal end to open the rotating structure 4, the spring 6 is arranged at the proximal end of the opening and closing control structure 3; if the opening and closing control structure 3 slides towards the distal end to open the rotating structure 4, the spring 6 is arranged at the distal end of the opening and closing control structure 3.

[0075] In this embodiment, the opening and closing control structure 3 is operated to move in the proximal direction of the handle assembly 20, the spring 6 is deformed by the extrusion of the opening and closing control structure 3; then when the catheter 10 is released, the opening and closing control structure 3 is released, and the spring 6 pushes the opening and closing control structure 3 to return to the initial position in the distal direction of the handle assembly 20 by the elastic force of the spring 6, so that the rotating structure 4 returns to the closed state. Here, after the opening and closing control structure 3 switches to the release position, the catheter 10 can automatically and quickly return to the normal position because the rotating structure 4 no longer binds the sliding structure 5. Then, the opening and closing control structure 3 is released, and the opening and closing control structure 3 automatically and quickly returns to the initial position under the action of the spring 6.

[0076] The limit position of the opening and closing control structure 3 moving in the proximal direction and the limit position of the opening and closing control structure 3 moving in the distal direction can be limited by corresponding structures, and the present application has no special limitation. The following is exemplarily described.

[0077] As an optional solution, as shown in Figure 18 The lug 32 of the opening and closing control structure is provided with a cavity 33, and the cavity 33 is open in the proximal direction; when the bottom 34 of the cavity 33 is attached to the distal end surface 101 of the handle 1, the opening and closing control structure 3 can be prevented from continuing to move in the proximal direction.

[0078] As a preferred solution, the limit position of the opening and closing control structure 3 moving in the distal direction is limited by the rotating base 7. Specifically, the bending control mechanism further comprises a rotating base 7, which is rotatably arranged on the handle 1 and arranged at the distal end of the opening and closing control structure 3. The rotating base 7 is connected with the rotating structure 4 and the opening and closing control structure 3, so that the opening and closing control structure 3 and the rotating structure 4 can be synchronously rotated with the rotating base 7. At this time, the rotating base 6 can be used as a part actually controlling the rotation of the rotating structure 4, and arranged at the distal end of the handle assembly 20.

[0079] Optionally, the lug 32 on the opening and closing control structure 3 passes through the hollow slot 71 on the rotating base 7, and the hollow slot 71 only limits the lug 32 in the circumferential direction and allows the lug 32 to move in the proximal direction in the axial direction. Then, when the distal end surface of the lug 32 is blocked in the axial direction by the hollow slot 71, the opening and closing control structure 3 is prevented from continuing to move in the distal direction.

[0080] Here, those skilled in the art should also know that there are many ways to limit the axial movement of the opening and closing control structure 3, and the above axial limiting way is only for illustration and does not constitute a limitation on the protection scope of the present application.

[0081] In order to realize the synchronous movement of the rotating base 7 and the rotating structure 4, the rotating base 7 and the rotating structure 4 are preferably relatively fixed by the concave-convex matching mode. As shown in Figure 16 The rotating base 7 and the rotating structure 4 are connected by the concave-convex matching mode, and the rotating base 7 is arranged in the rotating structure 4.Figure 7 In an exemplary embodiment, the rotating base 7 is provided with symmetrically distributed notches 72, and the distal end of the rotating structure 4 is provided with symmetrically distributed protrusions 44, which are inserted into the notches 72 to tightly fit, so that the two can rotate synchronously.

[0082] To ensure that the two parts 41 and 42 of the rotating structure 4 can be accurately aligned, as shown in Figure 13 the two parts 41 and 42 of the rotating structure 4 are preferably provided with a guide structure, which includes guide pins 45 and pin holes. The guide pins 45 are arranged on one of the two parts 41 of the rotating structure 4, and the pin holes are arranged on the other part 42 of the rotating structure 4. The guide pins 45 are aligned with the corresponding pin holes to limit the movement direction of the two parts 41 and 42 of the rotating structure 4 when opening or closing. There are at least two guide pins 45 symmetrically arranged between the two parts 41 and 42 of the rotating structure 4. Preferably, the two parts 41 and 42 of the rotating structure 4 are aligned when opening or closing through four guide pins 45, which ensures the accuracy of the opening and closing operation and avoids the misalignment of the threads of the two parts 41 and 42.

[0083] Here, continuing to refer to Figure 8 and Figure 9 when the protrusions 43 on the rotating structure 4 are limited to the proximal end of the beveled sliding groove 31, the rotating structure 4 is in a closed state, at which time each guide pin 45 is inserted into the corresponding pin hole; and referring to Figure 10 and Figure 11 when the protrusions 43 on the rotating structure 4 are limited to the distal end of the beveled sliding groove 31, the rotating structure 4 is in an open state, at which time each guide pin 45 is pulled out of the pin hole.

[0084] In another aspect, when the rotating structure 4 is operated to perform the bending control operation, the catheter 10 itself has a certain elastic restoring force, which will act as a counterforce on the rotating structure 4. Therefore, to some extent, the bending control operation needs to overcome this counterforce to avoid the rebound of the catheter 10. For example, in some cases, a self-locking mechanism can be provided to lock the catheter 10 at the current bending angle to avoid the rebound of the catheter 10.

[0085] However, in the embodiment of the present application, the self-locking mechanism is omitted, and the locking of the bending position of the catheter 10 is achieved only through the self-locking function of the threads. For this purpose, the threads of the rotating structure 4 and the threads of the sliding structure 5 are preferably provided with similar right-angle edges A, and the similar right-angle edges A of the threads of the rotating structure 4 and the threads of the sliding structure 5 are located at the distal end of the threads. For details, please refer to Figure 14 and Figure 15For example, the thread of the rotating structure 4 and the thread of the sliding structure 5 are set as similar right triangle or similar right trapezoid. When the thread is set as similar right side A, the angle of the thread distal end tends to 90°, which can realize the locking of the catheter 10 at any bending angle, thereby simplifying the structure and the bending operation.

[0086] Please refer to Figures 3 to 19 In the preferred embodiment provided in the present application, the sliding structure 5 can be set as including a threaded sliding block 51 and a locking sliding block 52; the threaded sliding block 51 is used to cooperate with the rotating structure 4, and the locking sliding block 52 is used to lock the connection of the bending wire 11. Please refer to Figure 19 In some embodiments, the bending wire 11 passes through the threaded sliding block 51 and the locking sliding block 52 at the same time and is locked at the locking sliding block 52. The bending wire 11 and the locking sliding block 52 can be connected in various ways, for example, adhesively, by welding, crimping or other ways.

[0087] The threaded sliding block 51 and the locking sliding block 52 can be integrally formed. Actually, in order to reduce the difficulty of mold processing, the threaded sliding block 51 and the locking sliding block 52 are preferably separately processed, that is, the threaded sliding block 51 and the locking sliding block 52 are separately processed. When the threaded sliding block 51 and the locking sliding block 52 are separately processed, the proximal end of the threaded sliding block 51 and the distal end of the locking sliding block 52 can be connected or only attached.

[0088] Whether integrally or separately processed, the proximal end of the threaded sliding block 51 is provided with the locking sliding block 52, and the locking sliding block 52 is connected with the bending wire 11; when the threaded sliding block 51 is driven to slide axially by the rotating structure 4, the locking sliding block 52 is also driven to slide axially synchronously; when the locking sliding block 52 is pulled to slide axially by the bending wire 11, the threaded sliding block 51 is also driven to slide axially synchronously and returns to the initial position. Preferably, the internal thread of the rotating structure 4 cooperates with the external thread of the threaded sliding block 51, wherein the rotating structure 4 adopts a threaded sleeve to realize it.

[0089] Preferably, the external thread of the threaded sliding block 51 has a smaller diameter than the external diameter of the locking sliding block 52; in this way, on the one hand, the end faces of the threaded sliding block 51 and the locking sliding block 52 can be closely attached, and on the other hand, the external diameter of the locking sliding block 52 can be prevented from invading the internal thread of the rotating structure 4, thereby avoiding the problem that the sliding structure 5 is stuck.

[0090] Furthermore, the locking slider 52 preferably adopts a structure that is easy to observe and identify with the naked eye. For example, the locking slider 52 can be set to a bright color (such as red, yellow, etc.), or a brightly colored marking strip can be set on the locking slider 52. In short, it is convenient for the user to directly observe the sliding position of the locking slider 52. The handle 1 is preferably provided with an observation window 102, through which the locking slider 52 can be directly seen. The observation window 102 can be a hole or a transparent structure. In addition, for easy observation, at least some parts of the rotating structure 4, the threaded slider 51, and the locking slider 52 can be made into transparent parts. In addition, as an option, the edge of the observation window 102 can be provided with a bending stroke scale line. The sliding stroke of the locking slider 52 can be determined by the stroke scale line, thereby determining the bending state of the guide tube 10. Secondly, the handle 1 can also be equipped with some indicator marks for bending, opening and closing operations, etc., to give the user clear operation prompts.

[0091] The structure of the central tube shaft 2 will be further explained next.

[0092] As described above, the central tube shaft 2 and the handle 1 are kept relatively fixed. To this end, the proximal end of the central tube shaft 2 is connected to the handle 1, thereby locking the handle 1. Optionally, a flange 21 is provided at the proximal end of the central tube shaft 2, and the flange 21 is engaged and fixed with the proximal end of the handle 1. Furthermore, in the embodiment where the spring 6 is provided, one end of the spring 6 can be directly fixed to the distal end of the flange 21.

[0093] like Figure 3 As shown, the handle 1 is typically composed of two halves, 110 and 120, which are engaged and locked onto the flange 21. Additionally, the distal end of the handle 1 can optionally be locked via a rotating base 7.

[0094] The central tube shaft 2 adopts an integral or one-piece structure. Given the relatively long length of the central tube shaft 2, to reduce the difficulty of mold making and installation, the central tube shaft 2 preferably adopts a split structure. Specifically, as shown... Figure 3 , Figures 18-19As shown, the central tube shaft 2 comprises a coaxially arranged extension tube 210 and a main tube 220, the main tube 220 is arranged in the handle 1; the proximal end of the extension tube 210 is sleeved with the distal end of the main tube 220; the proximal end of the main tube 220 is connected with the proximal end of the handle 1; the distal end of the extension tube 210 extends out of the distal end of the handle 1 and is connected with the stress diffusion tube 8. The stress diffusion tube 8 is made of soft plastic and is generally inlaid on the extension tube 210 through reverse buckle features, so as to realize the stress diffusion effect of the connecting part of the catheter 10 and the extension tube 210, and prevent the catheter 10 from being broken when it is subjected to bending force. Among them, the proximal end of the extension tube 210 is sleeved on the outside of the main tube 220, or the proximal end of the extension tube 210 is sleeved on the inside of the main tube 220.

[0095] In the specific assembly, the main tube 220 is arranged in the handle 1 as a whole, the proximal end of the catheter 10 is inserted into the main tube 220 and is adhesively fixed with the main tube 220, then the extension tube 210 is sleeved on the catheter 10 and the main tube 220, and the catheter 10 is adhesively fixed with the extension tube 210. In this way, the difficulty of mold opening processing of the long central tube shaft 2 can be effectively reduced, and the catheter 10 can be easily installed. The extension tube 210 and the main tube 220 only have a sleeving relationship, and do not need to be fixed through additional mechanical structures.

[0096] Therefore, the sliding structure 5 is directly sleeved on the main tube 220 and axially slides along the main tube 220, and the sliding structure 5 is limited by the main tube 220 and can only axially slide and cannot circumferentially rotate.

[0097] As shown in Figures 4-6 , and Figure 14 In the preferred embodiment provided in the present application, the central tube shaft 2 is provided with symmetrically arranged circular metal sliding rods 9, the metal sliding rods 9 extend along the axial direction of the central tube shaft 2; and the sliding structure 5 is directly sleeved on the metal sliding rods 9 to axially slide along the metal sliding rods 9. The arrangement of the metal sliding rods 9 can change the sliding contact between the plastic (sliding structure 5) and the plastic (central tube shaft 2) into the sliding contact between the metal (metal sliding rod 9) and the plastic (sliding structure 5), and at the same time, the traditional concave-convex matching mode of non-circular contact is replaced by the concave-convex matching mode of circular contact. In this way, the friction contact area is effectively reduced, and the friction force in the sliding process of the sliding structure 5 is reduced.

[0098] The sliding structure 5 is preferably arranged to only contact with the metal sliding rods 9 and is in a suspended state without contacting with the central tube shaft 2 at other positions, so that the sliding contact area is smaller and the friction force in the sliding process is effectively reduced. In the embodiment, the threaded sliding block 51 and the locking sliding block 52 are arranged on the two cylindrical metal sliding rods 9 and axially slide along the two metal sliding rods 9.

[0099] As shown in Figure 14 , the inner hole 511 of the threaded slider 51 is provided with symmetrically distributed arc-shaped matching holes 512, which are matched with the metal slide rod 9. When matched, the inner hole surface of the threaded slider 51 is not in contact with the outer surface of the main tube 220, and there is a gap. For the same reason, the inner hole surface of the locking slider 52 is not in contact with the surface of the main tube 220, and there is a gap. Therefore, the metal slide rod 9 can lift the sliding structure 5 in the radial direction, avoiding direct contact between the sliding structure 5 and the center tube shaft 2. When specifically arranged, symmetrically distributed long grooves (not labeled) can be provided on the outer surface of the main tube 220. The long grooves are usually hollow, and the metal slide rod 9 is embedded in the long grooves for fixation. Most of the surface of the metal slide rod 9 protrudes from the outer surface of the main tube 220. The length of the long groove can be set and adjusted according to the moving stroke of the sliding structure 5.

[0100] Further, as shown in Figure 4 , the center tube shaft 2 is provided with a wire outlet notch 22 at the position of the proximal end of the catheter 10 for the control bending wire 11 to pass through. The wire outlet notch 22 extends from the distal end to the proximal end. In this way, the control bending wire 11 is led out from the proximal end of the catheter 10, then passes through the wire outlet notch 22, further passes through the threaded slider 51 and the locking slider 52, and is locked and connected at the locking slider 52.

[0101] As shown in Figure 3 , Figure 18 , and Figure 19 , in some embodiments, the distal end of the rotating base 7 can also be limited by means of the extension tube 210. When specifically installed, a part of the extension tube 210 passes through the rotating base 7 and the opening and closing control structure 3, and is sleeved with the main tube 220 in the handle 1. Another part of the extension tube 210 is limited at the distal end of the rotating base 7, and the distal end of the extension tube 220 is assembled and connected with the stress diffusion tube 8. In order to limit the rotating base 7, the extension tube 220 is provided with an annular flange 211, which is arranged at the distal end of the rotating base 7 to avoid axial displacement of the rotating base 7 to the distal end. Further, there is a gasket 12 between the rotating base 7 and the annular flange 211, which can reduce the friction force that needs to be overcome when the rotating base 7 rotates. The gasket 12 can be made of PTFE (polytetrafluoroethylene) or other materials with small friction coefficient.

[0102] In summary, the handle assembly 20 of the conveying system comprises: a handle 1, a center tube shaft 2 and a bending control mechanism; the bending control mechanism is installed on the handle 1; the center tube shaft 2 is arranged in the handle 1 and is kept relatively fixed with the handle 1; the bending control mechanism comprises an opening and closing control structure 3, a rotating structure 4 and a sliding structure 5 which are arranged around the center tube shaft 2; the opening and closing control structure 3 is connected with the rotating structure 4 to control the opening or closing of two parts 41 and 42 of the rotating structure 4 in the direction perpendicular to the axial direction; when the rotating structure 4 is closed, the sliding structure 5 is threadedly matched with the rotating structure 4, so that the sliding structure 5 can slide along the center tube shaft 2 to the proximal end along with the rotation of the rotating structure 4 to tighten the bending wire 11 connected with the sliding structure 5; when the rotating structure 4 is opened, the sliding structure 5 is threadedly disengaged from the rotating structure 4, so that the sliding structure 5 can slide along the center tube shaft 2 to the distal end along with the rebound of the bending wire 11 to release the bending wire 11.

[0103] In this way, when it is needed to release the bending state of the catheter 10, the user only needs to operate the opening and closing control structure 3 to disengage the thread matching between the rotating structure 4 and the sliding structure 5, and when the thread matching between the rotating structure 4 and the sliding structure 5 is disengaged, the rotating structure 4 no longer binds the sliding structure 5, so that the sliding structure 5 can be automatically reset by the catheter 10 and the bending wire 11, thereby avoiding the process of reverse operation of the rotating structure 4, making the bending operation more convenient, shortening the operation time and improving the operation efficiency, and reducing the operation difficulty.

[0104] It should be noted that the innovation of the present application is derived from the conveying system of the leadless pacemaker, but those skilled in the art can understand that the present application can be applied to any in-vivo implanted device which needs to be delivered through a catheter. The following will be described with reference to the accompanying drawings.

[0105] It should be noted that the above several embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present application, and does not limit the scope of the present application, and any modification made by those skilled in the art according to the above disclosure is within the protection scope of the present application.

Claims

1. A handle assembly for a delivery system, the handle assembly comprising: The application relates to a handle, a central tube shaft and a bending control mechanism; the bending control mechanism is installed on the handle; the central tube shaft is arranged at least partially in the handle and is kept relatively fixed with the handle; the bending control mechanism comprises opening and closing control structure, rotating structure and sliding structure arranged around the central tube shaft. The opening and closing control structure is connected with the rotating structure to control the opening and closing of two parts of the rotating structure in the direction perpendicular to the axial direction. When the rotating structure is closed, the rotating structure is screwed with the sliding structure, so that the sliding structure can slide along the central tube shaft to the proximal end with the rotation of the rotating structure to tighten the bending wire connected with the sliding structure. When the rotating structure is opened, the rotating structure is unscrewed with the sliding structure, so that the sliding structure can slide along the central tube shaft to the distal end with the rebound of the bending wire to release the bending wire. The opening and closing control structure is slidably arranged on the handle and can rotate synchronously with the rotating structure; the opening and closing control structure is sleeved outside the rotating structure, and the rotating structure is sleeved with the sliding structure.

2. The handle assembly of the delivery system of claim 1, wherein, The opening and closing control structure is configured to control the closing of the two parts of the rotating structure in the initial position, and the opening and closing control structure is further configured to control the opening of the two parts of the rotating structure when moving from the initial position to the release position. The bending control mechanism further comprises a spring sleeved on the central tube shaft, and the spring is arranged at one end of the opening and closing control structure; one end of the spring is fixed, and the other end of the spring abuts against the opening and closing control structure.

3. The handle assembly of the delivery system of claim 2, wherein, During the driving of the opening and closing control structure from the initial position to the release position, the spring stores elastic potential energy; after the opening and closing control structure is released, the spring releases the elastic potential energy to push the opening and closing control structure from the release position to the initial position. One of the rotating structure and the opening and closing control structure is provided with symmetrically arranged convex columns, and the other of the rotating structure and the opening and closing control structure is provided with symmetrically arranged oblique sliding grooves; each convex column is limited in a corresponding oblique sliding groove to slide along the oblique sliding groove, and the oblique sliding groove is at an angle with the axial direction and the direction perpendicular to the axial direction.

4. The handle assembly of the delivery system of claim 2, wherein, The two parts of the rotating structure are provided with symmetrically arranged convex columns, the opening and closing control structure is provided with symmetrically arranged oblique sliding grooves, and the oblique sliding grooves are at an acute angle with the direction from the proximal end to the distal end in the axial direction; and / or the opening and closing control structure has two oppositely arranged side walls, the rotating structure is arranged between the two side walls, the oblique sliding grooves or the convex columns are arranged on each side wall, the proximal ends of the two side walls are connected and penetrated by the central tube shaft, and the distal ends of the two side walls are respectively provided with convex ears which are partially exposed outside the handle, and the convex ears enable the opening and closing control structure to rotate synchronously with the rotating structure.

5. The handle assembly of the delivery system of claim 4, wherein, ​ 6. The handle assembly of the delivery system of claim 2, wherein, The inner thread of the rotating structure matches the outer thread of the sliding structure when the rotating structure is closed; the inner thread of the rotating structure is disengaged from the outer thread of the sliding structure when the rotating structure is opened; the bending control mechanism further comprises a rotating base which is rotatably arranged on the handle and arranged at the distal end of the opening and closing control structure, the rotating base is connected with the rotating structure and the opening and closing control structure, so that the opening and closing control structure and the rotating structure can be synchronously rotated with the rotation of the rotating base.

7. The handle assembly of the delivery system of any one of claims 1-6, wherein, The thread of the rotating structure and the thread of the sliding structure are both provided with similar right-angle edges, and the similar right-angle edges of the threads are located at the distal end of the threads; and / or, a guide structure is arranged between the two parts of the rotating structure, the guide structure comprises a guide pin and a pin hole, the guide pin is arranged on one of the two parts of the rotating structure, and the pin hole is arranged on the other part of the rotating structure, the guide pin is aligned with a corresponding one of the pin holes to limit the movement direction of the two parts of the rotating structure when the rotating structure is opened or closed.

8. The handle assembly of the delivery system of any one of claims 1-6, wherein, A circular metal slide rod is arranged on the central tube shaft in a symmetrical manner, the sliding structure is sleeved on the metal slide rod to axially slide along the metal slide rod; and / or, the sliding structure comprises a threaded slide block and a locking slide block, the proximal end of the threaded slide block is provided with the locking slide block, the locking slide block is connected with the bending control wire, the inner thread of the rotating structure matches the outer thread of the threaded slide block, and the small diameter of the outer thread of the threaded slide block is greater than the outer diameter of the locking slide block.

9. A delivery system characterized by, The handle assembly comprises a catheter and a delivery system as claimed in any one of claims 1-8; the proximal end of the catheter is inserted into the central tube shaft and connected with the central tube shaft; the bending control wire is connected with the catheter and the sliding structure.

10. The delivery system of claim 9, wherein, The central tube shaft is provided with a wire outlet gap at the position of the proximal end of the catheter for the bending control wire to pass through; and / or, the central tube shaft is a split structure and comprises an extension tube and a main tube which are coaxially arranged, the main tube is arranged in the handle, the proximal end of the extension tube is sleeved with the distal end of the main tube, the proximal end of the main tube is connected with the proximal end of the handle, the distal end of the extension tube extends out of the distal end of the handle and is connected with a stress dispersion tube, and the proximal end of the catheter is adhesively fixed with the extension tube and the main tube respectively.

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