Plugging device

Abstract

The invention belongs to the technical field of interventional medical instruments and relates to a plugging device which comprises a fixing portion, a sealing portion and a connecting portion, the connecting portion is arranged between the fixing portion and the sealing portion, and a first connecting piece and a second connecting piece of the connecting portion are independently connected with the fixing portion and the sealing portion respectively. The plugging device comprises an initial state and an assembly state, and in the initial state, the first connecting piece and the second connecting piece are mutually independent; in an assembling state, the first connecting piece is connected with the second connecting piece so as to connect the fixing part and the sealing part; therefore, the sealing part and the fixing part can be packaged and produced independently, and can be assembled according to the required size when being implanted, so that the assembled left auricle plugging device has better adaptability and can also adapt to left auricle shapes with special sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of interventional medical devices, and particularly to a plugging device. Background Art

[0002] In interventional medicine, an occlusion device is a device used to close or block blood vessels or cavities, and is usually used to treat vascular abnormalities or lesions to block abnormal blood flow or close abnormal channels. Common occlusion devices mainly include vascular occlusion devices, hole occlusion devices, and catheter occlusion devices. Among them, the hole occlusion device is mainly used to close pores or defects in the heart, such as the left atrial appendage, atrial septal defect, or patent ductus arteriosus. Taking the left atrial appendage as an example, the left atrial appendage is a long, narrow, curved blind-end structure extending forward and downward along the anterior lateral wall of the left atrium, with active contraction and secretion functions. The cerebral stroke caused by atrial fibrillation mainly originates from the left atrial appendage. During interventional surgery, a left atrial appendage occlusion device is usually used to occlude the mouth of the left atrial appendage to prevent thrombus in the left atrial appendage from entering the left atrium and causing cerebral stroke caused by atrial fibrillation, and also to block the blood flow from the left atrium into the left atrial appendage.

[0003] Currently, the left atrial appendage occlusion devices on the market mainly have two structures: plug type and double-disk type. Among them, the double-disk type left atrial appendage occlusion device usually includes a fixing disk and a sealing disk. In the existing disk-type left atrial appendage occlusion devices, the fixing disk and the sealing disk are usually fixedly connected into one body by welding or an intermediate connecting member.

[0004] However, for the left atrial appendage occlusion device implanted in a patient, both the fixing disk and the sealing disk generally need to be adapted according to the shape, size, etc. of the corresponding position of the patient's left atrial appendage. On the one hand, the specifications of the existing left atrial appendage occlusion devices are limited and meet certain relative size limitations; on the other hand, the patient's left atrial appendage size and shape are accurately measured only during the implantation stage. If there is no suitable left atrial appendage occlusion device, the surgery cannot be carried out. If it is re-customized, the patient needs to be re-implanted, bringing greater risks. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to solve the technical problem that the existing plugging device, due to its integral structure, increases the difficulty of inventory and production management when there is too much reserve, and is likely to delay the surgical opportunity when there is too little reserve.

[0006] To solve the above technical problem, the embodiments of the present invention provide a plugging device, including a fixing part, a sealing part, and a connecting part for connecting the fixing part and the sealing part. The connecting part includes:

[0007] A first connecting member, connected to the proximal end of the fixing part;

[0008] A second connecting member, connected to the distal end of the sealing part;

[0009] The plugging device includes an initial state and an assembled state. In the initial state, the first connecting member and the second connecting member are independent of each other; in the assembled state, the first connecting member connects the second connecting member to connect the fixing portion and the sealing portion.

[0010] In one embodiment, after the fixing portion and the sealing portion are connected, the axial relative position and the radial relative position of the fixing portion and the sealing portion are restricted by a locking structure.

[0011] In one embodiment, the locking structure includes a first part and a second part. The first part is disposed or connected to the first connecting member, and the second part is disposed or connected to the second connecting member. In the assembled state, the first part and the second part are always in contact.

[0012] In one embodiment, the locking structure includes a first buckle hole and a first buckle. One of the first connecting member and the second connecting member is provided with the first buckle hole, and the other is provided with the first buckle; in the assembled state, the first buckle extends into the first buckle hole.

[0013] In one embodiment, a first buckle hole is formed in the side wall of the proximal end of the first connecting member, and a first buckle is provided at the distal end of the second connecting member. The first buckle can extend radially out of the side wall of the second connecting member.

[0014] Alternatively, a first insertion hole is formed in the proximal end of the first connecting member and is radially arranged. The inner diameter of the insertion hole of the first insertion hole is radially arranged, and the first insertion hole is a stepped hole with a smaller proximal aperture than the distal aperture. The first buckle axially extends toward the proximal end in the stepped hole, and a first buckle hole is recessed at the distal end of the second connecting member.

[0015] In one embodiment, a second insertion hole is axially formed in the proximal end of the first connecting member. The inner diameter of the insertion hole of the second insertion hole is radially arranged, and the second insertion hole is a stepped hole with a smaller proximal aperture than the distal aperture; the locking structure includes a limit switch that can axially move to open or close the socket of the second insertion hole.

[0016] In one embodiment, one end of the limit switch is fixed to the proximal end of the first connecting member by a spring. In the natural state, the spring maintains the limit switch to close the opening of the second insertion hole.

[0017] In one embodiment, the locking structure includes a screwing structure, a limiting step, and an anti - detachment spring ring. When the proximal end of the first connecting member is inserted into the distal end of the second connecting member, the first connecting member is fixedly connected to the second connecting member through the screwing structure, and at the position where the first connecting member and the second connecting member are axially butted, the anti - detachment spring ring is sleeved on the first connecting member or the second connecting member provided with the limiting step and axially abuts against the limiting step.

[0018] In one embodiment, at least one second buckle is provided on the inner side of the first connecting member. The second buckle inclines from the inner side wall of the first connecting member from the proximal end to the distal end towards the axis direction. At least one second fastener is provided on the side wall of the second connecting member. In the assembled state, the free end of the second buckle extends into the second buckle hole.

[0019] In one embodiment, a limiting step is formed on the outer wall of the second connecting member. In the assembled state, the proximal end of the first connecting member axially abuts against the limiting step.

[0020] Compared with the prior art, the plugging device provided by the embodiment of the present invention mainly has the following beneficial effects:

[0021] The plugging device is provided with a connecting part between the fixing part and the sealing part, and the first connecting member and the second connecting member of the connecting part are respectively independently connected to the fixing part and the sealing part. The plugging device includes an initial state and an assembled state. In the initial state, the first connecting member and the second connecting member are independent of each other; in the assembled state, the first connecting member connects the second connecting member to connect the fixing part and the sealing part. Thus, the sealing part and the fixing part can be packaged and produced relatively independently, and then assembled according to the required size when implantation is needed. Therefore, the assembled left atrial appendage occluder has good adaptability and can also adapt to the left atrial appendage shapes of some special sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the solutions in the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention or the corresponding prior art. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Wherein:

[0024] Figure 1 is a three - dimensional structural schematic diagram of a plugging device in an embodiment of the present invention;

[0025] Figure 2It is a plan sectional view when the connecting part of the plugging device and the locking structure are assembled and connected in the first specific implementation manner of the first embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the assembly principle of the first connecting member and the second connecting member fixedly connected through the locking structure in the first specific implementation manner of the first embodiment of the present invention;

[0027] Figure 4 It is a side view of the first connecting member and the second connecting member of the plugging device after being fixedly connected in the second specific implementation manner of the first embodiment of the present invention;

[0028] Figure 5 It is a side view of the first connecting member and the second connecting member of the plugging device being separated and independent from each other before assembly in the second specific implementation manner of the first embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the assembly principle of the first connecting member and the second connecting member fixedly connected through the locking structure in the second specific implementation manner of the first embodiment of the present invention;

[0030] Figure 7 It is a side view of the first connecting member and the second connecting member fixedly connected through the locking structure in the second embodiment of the present invention;

[0031] Figure 8 It is a plan sectional view of the first connecting member and the second connecting member fixedly connected through the locking structure in the second embodiment of the present invention;

[0032] Figure 9 It is a side view of the first connecting member and the second connecting member being separated and independent from each other before assembly and in the initial state in the second embodiment of the present invention;

[0033] Figure 10 It is a side view of the first connecting member and the second connecting member being separated and independent from each other before assembly and in the preparation stage of opening the second insertion hole in the second embodiment of the present invention;

[0034] Figure 11 It is a schematic diagram of the assembly principle of the first connecting member and the second connecting member fixedly connected through the locking structure in the second embodiment of the present invention;

[0035] Figure 12 It is a side view of the first connecting member and the second connecting member fixedly connected through the locking structure in the first specific implementation manner of the third embodiment of the present invention;

[0036] Figure 13 It is a schematic diagram of the assembly principle of the first connecting member and the second connecting member fixedly connected through the locking structure in the first specific implementation manner of the third embodiment of the present invention;

[0037] Figure 14It is a side view when the first connecting member and the second connecting member are fixedly connected through a locking structure in the second specific implementation manner of Embodiment III of the present invention;

[0038] Figure 15 It is a schematic diagram of the assembly principle when the first connecting member and the second connecting member are fixedly connected through a locking structure in the second specific implementation manner of Embodiment III of the present invention;

[0039] Figure 16 It is a side view when the first connecting member and the second connecting member are fixedly connected through a locking structure in the first specific implementation manner of Embodiment IV of the present invention;

[0040] Figure 17 It is a schematic diagram of the assembly principle when the first connecting member and the second connecting member are fixedly connected through a locking structure in the first specific implementation manner of Embodiment IV of the present invention;

[0041] Figure 18 It is a side view when the first connecting member and the second connecting member are fixedly connected through a locking structure in the second specific implementation manner of Embodiment IV of the present invention;

[0042] Figure 19 It is a schematic diagram of the assembly principle when the first connecting member and the second connecting member are fixedly connected through a locking structure in the second specific implementation manner of Embodiment IV of the present invention;

[0043] Figure 20 It is a plane cross-sectional view when the first connecting member and the second connecting member are fixedly connected through a locking structure in Embodiment V of the present invention;

[0044] Figure 21 It is a schematic diagram of the assembly principle when the first connecting member and the second connecting member are fixedly connected through a locking structure in Embodiment V of the present invention.

[0045] The reference numerals in the drawings are as follows:

[0046] 100, plugging device;

[0047] 1, fixing part; 11, fixing support frame; 12, coating film; 13, anchoring member;

[0048] 2, sealing part; 21, sealing support frame;

[0049] 3, connecting part; 31, first connecting member; 311, first jack; 312, second jack; 313, third jack; 32, second connecting member; 321, first limiting step; 322, second limiting step; 323, mounting hole; 324, T-shaped plugging part;

[0050] 4. Locking structure; 41. First buckle hole; 42. First buckle; 421. Stopping surface; 422. Guiding surface; 423. First spring; 43. Limit switch; 431. Second spring; 432. Baffle; 44. Rotating connection structure; 441. Internal thread; 442. External thread; 443. Boss; 444. Locking spiral hole; 4441. Locking point; 45. Third limiting step; 46. Anti - detachment spring ring; 47. Second buckle hole; 48. Second buckle; 49. Fourth limiting step. Detailed implementation mode

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs; the terms used herein in the specification are only for the purpose of describing specific embodiments and are not intended to limit the invention. For example, the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for convenience of description and cannot be construed as a limitation to the technical solution of this application.

[0052] The terms "comprising" and "having" and any variations thereof in the specification and claims of this invention and the above - mentioned drawings are intended to cover non - exclusive inclusion; the terms "first", "second", etc. in the specification and claims of this invention or the above - mentioned drawings are used to distinguish different objects and not to describe a specific order. The meaning of "a plurality" is two or more unless otherwise specifically defined.

[0053] In the specification, claims and the above - mentioned drawings of this invention, when an element is referred to as "fixed to" or "mounted on" or "disposed on" or "connected to" another element, it can be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element.

[0054] In addition, the mention of "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this invention. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] It should be noted that in the field of interventional medical devices, "proximal" and "distal" are conventional terms. Among them, "proximal" refers to the end of the medical device implanted in the body that is closer to the operator, and "distal" refers to the end that is farther from the operator. And based on this principle, the "proximal" and "distal" of any part of the medical device are defined. In addition, the position where the left atrium enters the left atrial appendage is defined as the orifice of the left atrial appendage, and the position adjacent to the entrance of the left atrial appendage inside the left atrial appendage is defined as the neck of the left atrial appendage. "Axial" generally refers to the length direction of the medical device when it is being delivered, and "radial" generally refers to the direction perpendicular to its "axial" direction of the medical device, and based on this principle, the "axial" and "radial" of any part of the medical device are defined. "Middle section" generally refers to the part of any part of the medical device that is different from the two ends, and does not only refer to the part located in the exact middle position of any part of the medical device.

[0056] An embodiment of the present invention provides a occluding device 100, which can be used to occlude the orifice of the left atrial appendage, and can also be used to occlude pores or defects in other internal tissues of humans or animals. The voids or defects described here include but are not limited to atrial septal defect, ventricular septal defect, patent ductus arteriosus, patent foramen ovale, etc. For the convenience of description, the occluding device 100 will be introduced in detail below taking the occlusion of the left atrial appendage as an example.

[0057] As Figures 1 to 6 shown, the occluding device 100 includes a fixing part 1 and a sealing part 2. Generally, the fixing part 1 and the sealing part 2 are arranged at intervals along the axial direction of the occluding device 100. Specifically, the two can be directly connected or indirectly connected through other components, and the sealing part 2 is located at the proximal end of the occluding device 100, and the fixing part 1 is located at the distal end of the occluding device 100. Among them, the fixing part 1 is mainly used to enter the cavity to be occluded and be anchored on the inner wall of the cavity to be occluded. The sealing part 2 is mainly used for occlusion to close the cavity to be occluded. The cavity to be occluded described here includes but is not limited to the left atrial appendage, aneurysm, etc.

[0058] Exemplarily, taking the left atrial appendage occluder as an example, when the left atrial appendage occluding device 100 is implanted into the left atrial appendage, after the fixing part 1 is released in the left atrial appendage, its fully expanded state includes but is not limited to being columnar or umbrella-shaped to closely fit the cavity wall of the left atrial appendage, so as to facilitate fixing the occluding device 100 in the left atrial appendage and ensure that the left atrial appendage occluding device 100 is implanted in the left atrial appendage effectively for a long time; after the sealing part 2 is released in the left atrium, it closely adheres to the orifice or inner cavity of the left atrial appendage to occlude the left atrial appendage, prevent the thrombus formed in the left atrial appendage from flowing into the left atrium, and prevent the blood flow in the left atrium from flowing into the left atrial appendage.

[0059] Exemplarily, the fixing part 1 may include a fixing support frame 11, a covering film 12, an anchoring member 13, and a proximal restraint member. Among them, the fixing support frame 11 may be circumferentially spliced through support rods (not shown in the figure), or woven into a mesh structure by braided wires, and then heat-set after being closed by the proximal restraint member. Its overall shape is not limited, as long as the released fixing part 1 can fix the occlusion device 100 at a specific position in the body. As Figure 1 shown, at least one layer of covering film 12 may be selectively coated on the inside or outside of the fixing support frame 11 to further occlude the left atrial appendage and avoid excessive stress concentration on the surface of the fixing part 1 while ensuring good sealing of the sealing part 2.

[0060] In addition, to facilitate the long-term and effective implantation of the occlusion device 100 into the left atrial appendage and avoid problems such as device embolism caused by detachment, at least one anchoring member 13 is provided on the support rods or braided wires of the fixing support frame 11. Exemplarily, the anchoring member 13 may be provided on the fixing support frame 11 by means of welding, hot melting, entanglement, bonding, etc. Of course, the anchoring member 13 may also be integrally formed and cut out from the fixing support frame 11 directly.

[0061] Specifically in this embodiment, the anchoring member 13 includes but is not limited to anchor spines, anchor hooks, etc. Exemplarily, as Figure 1 shown, the anchoring member 13 may preferably be an anchor spine, and the anchor spine may extend from the distal end to the proximal end of the fixing part 1 and gradually deviate from the fixing part 1, so that the tip of the anchor spine can more smoothly penetrate into the inner wall of the left atrial appendage and be firmly anchored to the inner wall of the left atrial appendage. On the one hand, it makes the fixing part 1 stably anchored to the inner wall of the left atrial appendage, ensuring that the occlusion device 100 can occlude the left atrial appendage effectively in the long term. On the other hand, during the contraction and relaxation of the left atrial appendage with the heart, it is beneficial to ensure the close contact between the occlusion device 100 and the inner wall of the left atrial appendage.

[0062] In addition, as Figure 1 and Figure 2 shown, the sealing part 2 may at least include a sealing support frame 21 and a distal restraint member (see Figure 2 ), among which, the sealing support frame 21 may be woven into a network tube by multiple braided wires, and the distal and proximal ends of the network tube can be respectively closed and fixed by distal restraint members such as sleeves for the ports of the braided wires, and then heat-set into shapes including but not limited to disc-shaped, columnar, flat-shaped or plug-shaped, etc.

[0063] Of course, at least one flow-blocking film (not shown in the figure) may be provided inside and / or outside the sealing part 2 to block the blood flow in the left atrium from flowing into the left atrial appendage and block the thrombus in the left atrial appendage from entering the left atrium to ensure the tight occlusion of the mouth of the left atrial appendage.

[0064] Specifically, the edge of the flow-blocking film can be fixed to the braided wire at the edge of the sealing part 2 by means including but not limited to sewing, bonding, etc. The size of at least one flow-blocking film on the sealing part 2 is equivalent to the disk size of the sealing part 2, so as to completely cover the disk surface of the sealing part 2 and ensure the tight plugging of the orifice of the left atrial appendage.

[0065] It should be noted that the covering film 12 of the fixing part 1 and the flow-blocking film of the sealing part 2 are both made of polymer materials, and can be preferably but not limited to PTFE (Poly Tetra Fluoro Ethylene) or PET (Poly Ethylene Terephthalate).

[0066] In the embodiment of the present invention, as Figure 1 shown, to realize the fixed connection between the fixing part 1 and the sealing part 2, the occluding device 100 further includes a connecting part 3. Among them, in the using state of the occluding device 100, the connecting part 3 is located between the fixing part 1 and the sealing part 2, and both ends of the connecting part 3 are axially connected to the fixing part 1 and the sealing part 2 respectively.

[0067] Specifically, as Figure 3 , Figure 6 , Figure 11 , Figure 13 , Figure 15 , Figure 17 or Figure 21 shown, the connecting part 3 includes a first connecting member 31 and a second connecting member 32. Among them, the first connecting member 31 is connected to the proximal end of the fixing part 1, and the second connecting member 32 is connected to the distal end of the sealing part 2. And in the initial state, the first connecting member 31 and the second connecting member 32 are independent of each other. When the occluding device 100 needs to be used, determine the corresponding sizes of the required fixing part 1 and sealing part 2, select the appropriate fixing part 1 and sealing part 2, and connect the fixing part 1 and the sealing part 2 through the first connecting member 31 and the second connecting member 32 to achieve assembly to the assembled state. Thus, the fixing part 1 and the sealing part 2 can be used as finished products respectively, and can be individually packaged, transported, sold and stored, etc. When the occluding device 100 needs to be used, then select the appropriate specifications of the fixing part 1 and the sealing part 2 according to the needs for combined use.

[0068] In addition to manufacturing and transportation, more importantly, during the left atrial appendage occlusion procedure, the operator needs to first introduce a sheath and measure the size of the atrial appendage during the implantation process, and then implant an appropriate size of the occluding device according to the measurement results. That is to say, the special feature of the left atrial appendage occlusion procedure is that the process of selecting the left atrial appendage occluder is essentially one of the steps of the operation. Therefore, due to the inability to accurately determine the size required by the user, the operator needs to prepare multiple specifications or all specifications of the left atrial appendage occluders in advance, which undoubtedly increases the cost significantly.

[0069] In addition, it should also be noted that the dimensions of each part of the left atrial appendage occluder in the prior art are fixed and formed after being manufactured, that is, the corresponding specifications have been determined before the operator uses it. The manufacturer manufactures left atrial appendage occluders of multiple specifications to meet the needs of common atrial appendage shapes or dimensions. However, since the dimensions of each user's atrial appendage cannot be predicted in advance, and the common specifications in the prior art only have changes in dimensions (for example, the diameter of the fixing part of the left atrial appendage occluder in the common specifications is about 6-10 mm smaller than the diameter of the sealing part). If the dimensions of the user's atrial appendage do not perfectly fit the dimensions, only a left atrial appendage occluder of a larger model specification can be installed. Most importantly, if the dimensions of the patient's atrial appendage are relatively special (such as the diameters of the required fixing part and sealing part are close or even larger), it exceeds the common preset specifications, and the user can only choose to stop the implantation. The puncture and other steps before implantation undoubtedly become a pure harm to the user. If customized later, another operation is required after the customization is completed, bringing huge risks.

[0070] Therefore, in the prior art, the dimensions of the left atrial appendage occluder often cannot fully fit the atrial appendage, and there are also some dimensions that exceed the specifications of the conventional left atrial appendage occluder. Thus, by using the design in which the fixing part 1 and the sealing part 2 in this embodiment can be assembled, after the operator measures the dimensions of the atrial appendage, the fixing part 1 and the sealing part 2 are assembled, so as to obtain an occluding device 100 that can better fit the user's atrial appendage. Undoubtedly, the occluding device 100 in this embodiment has better adaptability.

[0071] Exemplarily, in the initial state, the proximal end of the fixing part 1 is connected to the first connecting member 31, and the proximal end of the first connecting member 31 is a free end. Among them, the fixing part 1 is restrained by the proximal restraint member, and the proximal restraint member is the proximal end of the fixing part 1. The first connecting member 31 can directly serve as the proximal restraint member of the fixing part 1, or can be set as an integral structure with the proximal restraint member of the fixing part 1; correspondingly, the distal end of the sealing part 2 is restrained by the distal restraint member, and the distal restraint member is the distal end of the sealing part 2. The distal end of the sealing part 2 is connected to the second connecting member 32, and the distal end of the second connecting member 32 is a free end. Among them, the second connecting member 32 can directly serve as the distal restraint member of the sealing part 2, or can be set as an integral structure with the distal restraint member of the sealing part 2. Since the first connecting member 31 and the second connecting member 32 are independent of each other. Thus, the fixing part 1 and the sealing part 2 are connected to each other through a connecting part 3, and the first connecting member 31 and the second connecting member 32 included in the connecting part 3 are respectively connected to the fixing part 1 and the sealing part 2.

[0072] In this embodiment, the first connecting member 31 and the second connecting member 32 do not refer to specially and independently existing components. The correspondingly connectable parts formed by processing the fixing part 1 and / or the sealing part 2 can also be regarded as the first connecting member and / or the second connecting member. For this embodiment, the fixing part 1 and the sealing part 2 can be independent of each other, each as a finished product, and can be separately packaged, transported, sold, stored, etc.

[0073] For the plugging device 100, the specification of the fixing part 1 is M sets, and the specification of the sealing part 2 is N sets. For the operator, preparing the fixing part 1 and the sealing part 2 with corresponding specifications can realize M*N specifications of the plugging device 100, which greatly improves the specification selection of the plugging device 100.

[0074] It should be noted that in the embodiment of the present invention, to simplify the combined splicing structure of the fixing part 1 and the sealing part 2, the proximal restraint of the fixing part 1 and the distal restraint of the sealing part 2 are preferably hollow sleeves. If the proximal restraint of the fixing part 1 can meet the functional requirements of the first connecting member 31 of the connecting part 3, the proximal restraint of the fixing part 1 can be used as the first connecting member 31, or only a slight modification of the proximal restraint of the fixing part 1 is needed to be the first connecting member 31. Similarly, the distal restraint of the sealing part 2 or the slightly modified distal restraint of the sealing part 2 can be used as the second connecting member 32. Of course, the first connecting member 31 and the second connecting member 32 can also be directly connected to the proximal restraint of the fixing part 1 and the distal restraint of the sealing part 2 respectively.

[0075] In summary, the plugging device 100 includes a fixing part 1 and a sealing part 2. The first connecting member 31 of the fixing part 1 and the second connecting member 32 of the sealing part 2 are combined to form a connecting part 3, and the connecting part 3 is located between the fixing part 1 and the sealing part 2.

[0076] Embodiment 1 of the plugging device 100 of the present invention

[0077] In order to enable those skilled in the art to better understand the solution of the present invention, the following will be combined with the attached Figures 1 to 6 to clearly and completely describe the technical solution in the first embodiment of the present invention.

[0078] In the first embodiment of the present invention, as Figures 1 to 6As shown in the figure, to achieve the fixed connection between the first connecting member 31 and the second connecting member 32, the connecting portion 3 includes a locking structure 4. The locking structure 4 includes a first buckle hole 41 and a retractable first buckle 42. One of the first connecting member 31 and the second connecting member 32 is provided with the first buckle hole 41, and the other is provided with the first buckle 42. In this embodiment, the first buckle hole 41 is provided on the side wall of the first connecting member 31, and the first buckle 42 is provided on the side surface of the second connecting member 32. When the first connecting member 31 and the second connecting member 32 are connected, the fixing portion 1 and the sealing portion 2 are connected by the snap connection between the first buckle hole 41 and the first buckle hole 41.

[0079] In this embodiment, the part where the locking structure 4 is provided or connected to the first connecting member 31 is denoted as the first part, and the part where the locking structure 4 is provided or connected to the second connecting member 32 is denoted as the second part. In order to achieve limiting, the first part and the second part always contact after assembly.

[0080] It should be noted that the first buckle 42 can achieve the retractable function through other structures such as springs, or it can have the retractable function itself, and no special limitation is made here. In addition, when the fixing portion 1 and the sealing portion 2 are fixedly connected, the first connecting member 31 can be sleeved on the second connecting member 32 or inserted into the second connecting member 32, which can be specifically determined according to the specific structures, positions, sizes, etc. of the first connecting member 31, the second connecting member 32, the first buckle hole 41, the first buckle 42 and other components.

[0081] It should be noted that when the fixing portion 1 and the sealing portion 2 are separated from each other, at least the following conditions are satisfied: the fixing portion 1 and the sealing portion 2 are axially separated from each other, and / or the fixing portion 1 and the sealing portion 2 are radially separated from each other. To achieve the connection between the fixing portion 1 and the sealing portion 2 when the first connecting member 31 and the second connecting member 32 are connected, in this embodiment, if the mutual insertion of the first connecting member 31 and the second connecting member 32 is regarded as connection, then the cooperation between the first buckle 42 and the first buckle hole 41 is regarded as anti-disconnection. However, objectively, the cooperation between the first buckle 42 and the first buckle hole 41 also belongs to a form of connection, that is, after the first connecting member 31 and the second connecting member 32 are connected, the axial relative position and the radial relative position of the fixing portion 1 and the sealing portion 2 are restricted, preventing the fixing portion 1 and the sealing portion 2 from being directly separated.

[0082] This embodiment 1 includes but is not limited to the following two specific implementation manners, specifically as follows:

[0083] In the first specific implementation manner of Embodiment 1, as Figures 1 to 3As shown, a first jack 311 with an axial socket is axially provided at the proximal end of the first connector 31, and a first snap hole 41 communicating with the first jack 311 is provided on the hole wall of the first jack 311; a limiting step is formed on the outer wall of the second connector 32. In this embodiment, this limiting step is defined as the first limiting step 321, and the second connector 32 is provided with a retractable first snap 42, and the first snap 42 radially protrudes from the second connector 32. When the proximal end of the first connector 31 is sleeved on the distal end of the second connector 32, the first snap 42 can enter the first snap hole 41 from the first jack 311 and snap into the first snap hole 41, and the proximal end of the first connector 31 axially abuts against the first limiting step 321.

[0084] Understandably, in this first specific embodiment, as Figure 3 shown, the first connector 31 and the second connector 32 are axially assembled. Specifically, the first connector 31 and the second connector 32 can be axially relatively close to each other. The distal end of the second connector 32 is axially inserted into the first jack 311 of the first connector 31, so that the proximal end of the first connector 31 is sleeved on the distal end of the second connector 32. During the process of the relative axial movement of the first connector 31 and the second connector 32 to achieve socket fixation, the first snap 42 exposed outside the second connector 32 is completely received into the second connector 32 under the extrusion of the inner wall of the first connector 31 to axially move with the second connector 32 in the first jack 311. When the first connector 31 and the second connector 32 move relative to each other to a position where the first snap 42 and the first snap hole 41 are opposite, the first snap 42 can extend from the first jack 311 into the first snap hole 41 to be snap-connected with the first snap hole 41, preventing the first connector 31 and the second connector 32 from axially separating.

[0085] Exemplarily, in this first specific embodiment, as Figure 2 and Figure 3 shown, for the convenience of installing the first snap 42 and ensuring the retractability of the first snap 42, a first spring 423 is radially provided on the first snap 42, and an installation hole 323 is provided on the second connector 32. The installation hole 323 communicates with the outside radially. The first spring 423 is radially installed in the installation hole 323 and can radially expand and contract. Understandably, the first snap 42 can protrude from the second connector 32 through the installation hole 323, and when being extruded by the inner wall of the first connector 31, it can be completely retracted into the installation hole 323, and at the position where the first snap hole 41 is located, it extends into the first snap hole 41 under the resilience of the first spring 423 to be snap-connected with the first snap hole 41 to achieve axial limit.

[0086] In addition, as Figure 2 and Figure 3As shown, when the first buckle 42 is buckled in the first buckle hole 41, that is, when the fixing part 1 and the sealing part 2 are fixedly connected and are in a combined fixed state, the proximal end of the first connecting member 31 is axially abutted against the first limiting step 321, that is, by locking the side wall of the proximal end of the first connecting member 31, the second connecting member 32 can no longer move distally relative to the first connecting member 31, which is conducive to ensuring the stability of the buckling of the first buckle 42 and the first buckle hole 41, and secondly, the first connecting member 31 and the second connecting member 32 are locked in the direction from the proximal end to the distal end of the occluding device 100, so that the sealing part 2 located in the left atrium will not be driven by the impact of the blood flow in the left atrium toward the left atrial appendage orifice, and the connecting member 31 will not move toward the distal position and leave the locking area, thereby separating the sealing part 2 from the fixing part 1, ensuring that the sealing part 2 and even the occluding device 100 can be effectively implanted in the predetermined position for a long time.

[0087] Preferably, if Figure 2 and Figure 3 As shown, a stop surface 421 is provided at the proximal end of the first buckle 42. When the first buckle 42 extends into the first buckle hole 41, the stop surface 421 axially abuts against the wall of the first buckle hole 41, so as to realize the axial fixed connection between the first buckle 42 and the first buckle hole 41, and prevent the second connecting member 32 from continuing to move toward the distal end, so as to further improve the locking effect of the first connecting member 31 and the second connecting member 32 in the proximal to distal direction of the blocking device 100.

[0088] In addition, in the first specific embodiment or other specific embodiments, if Figure 2 and Figure 3 As shown, a convex arc-shaped guide surface 422 is provided on the distal outer wall of the first buckle 42 so as to be more smoothly sleeved on the second connecting member 32 when the first connecting member 31 moves axially toward the second connecting member 32 .

[0089] In the second specific implementation of Example 1, its technical features are substantially the same as those of the first specific implementation of Example 1, for example, the locking principle of the first limiting step 321 is the same, etc. The same parts of the two are no longer repeated. The main difference lies in: the specific snap-in structure between the first connecting member 31 and the second connecting member 32, and the corresponding assembly principle are different.

[0090] In the second specific implementation of Example 1, Figures 4 to 6 As shown, the proximal end of the first connecting member 31 is axially provided with a first socket 311 radially arranged with a socket, the first socket 311 is a stepped hole with a proximal aperture smaller than a distal aperture, and a first buckle 42 is exposed axially outwardly toward the proximal end in the stepped hole. Exemplarily, the first buckle 42 is located on the axial locking end side of the stepped hole, and the head extends axially into the first socket 311.

[0091] In addition, a first limiting step 321 is formed on the outer wall of the second connecting member 32, and a first buckling hole 41 is recessed at the distal end of the second connecting member 32. When the proximal end of the first connecting member 31 is sleeved on the distal end of the second connecting member 32, the first buckle 42 can enter the first buckling hole 41 from the first jack 311 and buckle to the first buckling hole 41, and the proximal end of the first connecting member 31 axially abuts against the first limiting step 321.

[0092] Understandably, in this second specific embodiment, as Figure 6 shown, Figure 6 FIG. is a schematic assembly principle diagram of the first connecting member 31 and the second connecting member 32 fixedly connected by the locking structure 4 in the second specific embodiment of the first embodiment. The first connecting member 31 and the second connecting member 32 are radially assembled. Specifically, the first connecting member 31 and the second connecting member 32 can be radially relatively close to each other, so that the distal end of the second connecting member 32 is inserted laterally into the first jack 311 of the first connecting member 31, thereby realizing that the proximal end of the first connecting member 31 is sleeved on the distal end of the second connecting member 32. And in the process of the relative radial movement of the first connecting member 31 and the second connecting member 32 to realize the socket fixing, the first buckle 42 radially extending into the first jack 311 is axially extruded by the second connecting member 32 and completely withdrawn from the first jack 311. When the first connecting member 31 and the second connecting member 32 move radially relative to each other to a position where the first buckle 42 and the first buckling hole 41 are opposite, the first buckle 42 can extend from the first jack 311 to the first buckling hole 41 provided at the distal end of the second connecting member 32 to be buckled with the first buckling hole 41 to prevent the first connecting member 31 and the second connecting member 32 from radially separating.

[0093] Exemplarily, in this second specific embodiment, as Figure 6 shown, for the convenience of installing the first buckle 42 and ensuring the scalability of the first buckle 42, an axially arranged first spring 423 is provided on the first buckle 42. The first connecting member 31 forms a mounting hole 323 (not shown in the figure) axially communicating with the first jack 311 at the distal end of the first jack 311. The first spring 423 is axially installed in the mounting hole 323 and can axially expand and contract. Understandably, the first buckle 42 can extend into the first jack 311 through the mounting hole 323, and when axially extruded by the second connecting member 32, it can retract completely into the mounting hole 323, and at the position where the first buckling hole 41 is located, it extends to the first buckling hole 41 under the action of the resilience of the first spring 423 to be buckled with the first buckling hole 41 to realize radial limitation.

[0094] Also exemplarily, as Figure 5 and Figure 6As shown, to be adapted to the first socket 311 in the shape of a stepped hole, the distal end of the second connecting member 32 has a T-shaped plugging portion 324. Among them, the first latching hole 41 is recessed at the top of the T-shaped plugging portion 324. It can be understood that the proximal end of the first connecting member 31 and the distal end of the second connecting member 32 are in a T-shaped concave-convex fit within the first socket 311. On the one hand, it can ensure that the T-shaped plugging portion 324 of the second connecting member 32 can be fixed axially within the first socket 311, which is beneficial to ensuring the stability of the latching between the first latch 42 and the first latching hole 41. On the other hand, it realizes the locking of the first connecting member 31 and the second connecting member 32 in both the axial and radial directions of the sealing device 100, which is beneficial to ensuring the stability of the fixed installation of the sealing portion 2 located in the left atrium and the fixing portion 1 located in the left atrial appendage, and ensuring that the sealing portion 2 and even the sealing device 100 can be implanted in the predetermined position effectively for a long time.

[0095] Embodiment 2 of the plugging device 100 of the present invention

[0096] The main technical features of the second embodiment are generally the same as those of the first embodiment above, and are closer to the second specific implementation manner of the first embodiment. Both are axially plugged through radial assembly and radially limited. The same parts of the second embodiment and the first embodiment will not be described in detail. The main difference between it and the second specific implementation manner of the first embodiment lies in:

[0097] The specific structure of the locking structure 4 is different, and the relevant structures of the first connecting member 31 and the second connecting member 32 adapted to the locking structure 4 are correspondingly different.

[0098] In the second embodiment, as Figures 7 to 11 shown, the proximal end of the first connecting member 31 is axially provided with a second socket 312 with a radially arranged plugging hole. The second socket 312 is a stepped hole with a smaller proximal aperture than the distal aperture. A limiting step is formed on the outer wall of the second connecting member 32. In this embodiment, this limiting step is defined as the second limiting step 322. The locking structure 4 includes a limiting switch 43 that can axially move to open or close the socket of the second socket 312. When the proximal end of the first connecting member 31 is sleeved on the distal end of the second connecting member 32, the limiting switch 43 is radially abutted against the outer wall of the second connecting member 32 at the socket of the second socket 312, and the proximal end of the first connecting member 31 is axially abutted against the second limiting step 322.

[0099] It can be understood that in the second embodiment, as Figure 11 shown, Figure 11Schematic diagram of the assembly principle of the first connector 31 and the second connector 32 fixedly connected through the locking structure 4 in the second embodiment. The first connector 31 and the second connector 32 are radially assembled. Specifically, manually push the limit switch 43 to axially move in the distal direction to open the second socket 312 in the shape of a stepped hole on the first connector 31. Then, the first connector 31 and the second connector 32 can be radially relatively close to each other, so that the distal end of the second connector 32 is inserted laterally into the first socket 311 of the first connector 31. Furthermore, the proximal end of the first connector 31 is sleeved on the distal end of the second connector 32. And during the process of the relative radial movement of the first connector 31 and the second connector 32 to achieve socket fixing, when the distal end of the second connector 32 is completely located on the side of the limit switch 43 facing the second socket 312, the limit switch 43 can axially extend from the radial gap between the outer wall of the second connector 32 and the hole wall of the second socket 312 to the outer wall side of the second connector 32 to radially limit the distal end of the second connector 32 at the corresponding position of the second socket 312, preventing the second connector 32 from radially moving out of the second socket 312 and disengaging from the first connector 31.

[0100] It should be noted that in the second embodiment, by controlling the limit switch 43 to radially open or close the second socket 312, the first connector 31 and the second connector 32 can be assembled and disassembled.

[0101] It should be noted that in this embodiment, the connection of the fixing part 1 or the sealing part 2 is not prohibited from being movable. However, after the fixing part 1 and the sealing part 2 of this embodiment are assembled and before unlocking, the first connector 31 cannot be disengaged from the second connector 32.

[0102] Exemplarily, as Figures 9 to 11 shown, to achieve the function of the limit switch 43 to open or close the second socket 312, the limit switch 43 includes an L-shaped baffle 432 and a second spring 431. Among them, the second spring 431 is axially arranged on the termination end side of the second socket 312, and the proximal end is axially connected to the L-shaped baffle 432. At least part of the vertical plate (not shown in the figure) of the L-shaped baffle 432 is located in the first socket 311, and the horizontal plate of the L-shaped baffle 432 radially extends from the first socket 311 to the outside or is located in the socket of the first socket 311 for manually axially pushing and pulling the L-shaped baffle 432.

[0103] Embodiment 3 of the plugging device 100 of the present invention

[0104] The main technical features of the third embodiment are generally the same as those of the first embodiment above. The same parts of the third embodiment and the first embodiment will not be described in detail. The main difference between it and the first embodiment lies in: the specific structure of the locking structure 4 is different, and the relevant structures of the first connector 31 and the second connector 32 adapted to the locking structure 4 are correspondingly different.

[0105] In the third embodiment, as Figures 12 to 15 shown, the locking structure 4 includes a screwing structure 44, a limiting step (defined as the third limiting step 45 in this embodiment), and an anti-loosening spring ring 46. Among them, when the proximal end of the first connecting member 31 is inserted into the distal end of the second connecting member 32, the first connecting member 31 is fixedly connected to the second connecting member 32 through the screwing structure 44. And at the position where the first connecting member 31 and the second connecting member 32 are axially butted, the anti-loosening spring ring 46 is sleeved on the first connecting member 31 or the second connecting member 32 provided with the third limiting step 45 and axially abuts against the third limiting step 45.

[0106] It should be noted that when the fixing portion 1 and the sealing portion 2 are fixedly connected, the first connecting member 31 can be sleeved on the second connecting member 32 or inserted into the second connecting member 32. Similarly, the anti-loosening spring ring 46 can be sleeved on the first connecting member 31 or the second connecting member 32. Specifically, it can be determined according to the specific structures, positions, sizes, etc. of components such as the first connecting member 31, the second connecting member 32, and the screwing structure 44. Generally, it only needs to satisfy that when the two are sleeved, the first connecting member 31 and the second connecting member 32 will not reverse and loosen from each other, and they cannot be disassembled after being connected. Specifically, it can be determined according to actual needs.

[0107] It should also be noted that there can be various specific structures of the screwing structure 44, as long as it can achieve the fixed connection between the first connecting member 31 and the second connecting member 32 by relatively rotating the first connecting member 31 and the second connecting member 32 when they are inserted into each other.

[0108] Exemplarily, in the third embodiment, as Figures 12 to 15 shown, the screwing structure 44 includes an internal thread 441 and an external thread 442. Among them, one of the proximal end of the first connecting member 31 and the distal end of the second connecting member 32 is provided with the internal thread 441, and the other is provided with the external thread 442. The proximal end of the first connecting member 31 is spirally inserted into the distal end of the second connecting member 32 through the engagement of the internal thread 441 and the external thread 442; the third limiting step 45 is located on the side of the termination end of the external thread 442, and the anti-loosening spring ring 46 is sleeved on the external thread 442 on the side of the starting end of the internal thread 441.

[0109] Exemplarily, as Figure 12 and Figure 13 shown, Figure 13Schematic diagram of the assembly principle of the first connecting member 31 and the second connecting member 32 fixedly connected through the locking structure 4 in the first specific embodiment of the third embodiment. Specifically, an internal thread 441 is provided at the proximal end of the first connecting member 31, an external thread 442 is provided at the distal end of the second connecting member 32, a third limiting step 45 is provided on the second connecting member 32 where the external thread 442 is located, and an anti-loosening spring ring 46 is sleeved on the second connecting member 32 where the external thread 442 is located on the proximal side of the first connecting member 31. When the distal end of the second connecting member 32 is inserted into the proximal end of the first connecting member 31, manually rotate the second connecting member 32 and the first connecting member 31 relative to each other. By meshing the internal thread 441 of the first connecting member 31 and the external thread 442 of the second connecting member 32, the proximal end of the first connecting member 31 can be fixedly screwed with the distal end of the second connecting member 32.

[0110] And when the proximal end of the first connecting member 31 is fixedly screwed with the distal end of the second connecting member 32, that is, when the fixing part 1 and the sealing part 2 of the plugging device 100 are combined and fixed into one body, the proximal end of the anti-loosening spring ring 46 axially abuts against the third limiting step 45, and the distal end axially abuts against the proximal end of the first connecting member 31 to prevent the second connecting member 32 and the first connecting member 31 from loosening. The specific anti-loosening principles are at least the following three:

[0111] (1) During the relative rotation and axial movement of the second connecting member 32 and the first connecting member 31, the anti-loosening spring ring 46 can provide a certain amount of compressive deformation to generate a pre-tightening force, thereby generating a frictional force on the threaded connection surface, which is beneficial to increasing the frictional resistance between the first connecting member 31 and the second connecting member 32, realizing the damped rotation of the two, and avoiding loosening; and the elastic performance of the anti-loosening spring ring 46 can maintain the stability of the above-mentioned pre-tightening force, which is beneficial to the plugging device 100 remaining in a tightened state during the process of being impacted by blood flow in the body and stretching with the contraction of the heart.

[0112] (2) When the plugging device 100 is impacted by blood flow, the elastic anti-loosening spring ring 46 can absorb and disperse part of the energy to reduce the vibration transmitted to the threaded connection part 3, thereby being beneficial to reducing the risk of loosening of the threaded connection and improving the stability and reliability of the threaded connection structure between the first connecting member 31 and the second connecting member 32.

[0113] (3) The anti-loosening spring ring 46 can fill the small gaps or looseness existing in the threaded connection structure between the first connecting member 31 and the second connecting member 32 due to manufacturing and installation errors, so as to provide an additional tightening force, thereby compensating for the loosening of the threaded connection, helping to maintain the tightened state of the thread, and preventing loosening.

[0114] It should be noted that the anti-loosening spring ring 46 can have various setting methods. Specifically, in the first specific embodiment of the third embodiment, such as Figure 12 and Figure 13As shown, the anti-dropping elastic ring 46 is independently provided. Exemplarily, the anti-dropping elastic ring 46 is preferably a rubber gasket.

[0115] Alternatively, in the second specific implementation of Example 3, as Figure 14 and Figure 15 As shown, the anti-dropping elastic ring 46 is integrally formed on the first connecting member 31 or the second connecting member 32 provided with an internal thread 441. Exemplarily, the anti-dropping elastic ring 46 is integrally formed on the proximal end of the first connecting member 31 provided with an internal thread 441, sleeved on the second connecting member 32 provided with an external thread 442, and the outer wall of the anti-dropping elastic ring 46 is flush with that of the second connecting member 32.

[0116] It is particularly important that in this embodiment, since the fixing portion 1 and the sealing portion 2 also need to rotate when they are finally released and the steel cable is released, or the contraction and relaxation of the heart after implantation will also cause changes in the angle, only the threaded connection is unreliable (even if the setting is opposite to the rotation direction of the steel cable transmission, shaking and rotation will occur), therefore, the anti-detachment elastic ring 46 in this embodiment is necessary.

[0117] Embodiment 4 of the plugging device 100 of the present invention

[0118] The main technical features of the fourth embodiment are substantially the same as those of the third embodiment. For example, both embodiments are first axially plugged and then the first connecting member 31 and the second connecting member 32 are fixedly connected by relative rotation. The same parts of the fourth embodiment and the third embodiment are not repeated here. The main differences between the fourth embodiment and the third embodiment are as follows:

[0119] The specific structures of the rotational connection structures 44 are different, and the corresponding assembly principles for the fixed connection between the first connecting member 31 and the second connecting member 32 are also different.

[0120] In the fourth embodiment, Figures 16 to 19 As shown, when the proximal end of the first connecting member 31 and the distal end of the second connecting member 32 are plugged into each other, in order to achieve a fixed connection between the first connecting member 31 and the second connecting member 32 through relative rotation of the first connecting member 31 and the second connecting member 32, the screw-on structure 44 includes a boss 443 and a locking screw hole 444 having at least one locking point 4441, the third limiting step 45 is located on the side of the boss 443 away from the locking screw hole 444, and the anti-dropping elastic ring 46 is located on the starting end side of the locking screw hole 444.

[0121] In addition, one of the proximal end of the first connecting member 31 and the distal end of the second connecting member 32 is provided with a boss 443, and the other is provided with a locking spiral hole 444; after the proximal end of the first connecting member 31 is plugged into the distal end of the second connecting member 32, the boss 443 can reach the locking point 4441 along the locking spiral hole 444 through the relative rotation of the first connecting member 31 and the second connecting member 32, so as to lock and cooperate with the locking point 4441.

[0122] Exemplarily, as Figures 16 to 19 shown Figure 17 and Figure 19 are schematic diagrams of the assembly principle of the first connecting member 31 and the second connecting member 32 fixedly connected through the locking structure 4 in different specific embodiments of the fourth embodiment. Specifically, a locking screw hole 444 is provided at the proximal end of the first connecting member 31, a boss 443 is provided at the distal end of the second connecting member 32, a third limiting step 45 is provided on the second connecting member 32 where the boss 443 is located, and an anti-loosening elastic ring 46 is sleeved on the second connecting member 32 where the boss 443 is located on the proximal side of the first connecting member 31. When the distal end of the second connecting member 32 is inserted into the proximal end of the first connecting member 31, manually rotate the second connecting member 32 and the first connecting member 31 relative to each other. During the relative rotation of the two, the boss 443 reaches the locking point 4441 along the direction from the starting end to the ending end of the locking screw hole 444, and is in concave-convex fit with the locking point 4441 to stay at the position where the locking point 4441 is located, realizing the relative rotation locking of the second connecting member 32 and the first connecting member 31.

[0123] Moreover, when the proximal end of the first connecting member 31 is fixedly screwed to the distal end of the second connecting member 32, that is, when the fixing part 1 and the sealing part 2 of the plugging device 100 are fixedly combined into one body, the proximal end of the anti-loosening elastic ring 46 is axially abutted against the third limiting step 45, and the distal end is axially abutted against the proximal end of the first connecting member 31 to prevent the second connecting member 32 and the first connecting member 31 from loosening.

[0124] It should be noted that an internal thread 441 may be provided in the insertion hole of the first connecting member 31, and an external thread 442 may be provided at the distal end of the second connecting member 32; or, the insertion hole of the first connecting member 31 may be a smooth hole, and the distal end of the second connecting member 32 may be a smooth rod. The principle of the anti-loosening elastic ring 46 to achieve anti-loosening is basically similar to that of the anti-loosening elastic ring 46 in the third embodiment, and will not be elaborated here.

[0125] Specifically, there are various setting methods for the anti-loosening elastic ring 46. Specifically, in the first specific embodiment of the fourth embodiment, as Figure 16 and Figure 17 shown, the anti-loosening elastic ring 46 is independently provided. Exemplarily, the anti-loosening elastic ring 46 is preferably a rubber gasket.

[0126] Or, in the second specific embodiment of the fourth embodiment, as Figure 18 and Figure 19As shown, the anti - detachment elastic ring 46 is integrally formed on the first connecting member 31 or the second connecting member 32 provided with the locking spiral hole 444. Exemplarily, the anti - detachment elastic ring 46 is integrally formed at the proximal end of the first connecting member 31 provided with the locking spiral hole 444, sleeved on the second connecting member 32 provided with the boss 443, and the outer wall of the anti - detachment elastic ring 46 is flush with that of the second connecting member 32.

[0127] Exemplarily, to form a spiral elastic structure, the proximal end restraint of the first connecting member 31 or the fixing part 1 can be processed into a spring structure to achieve the same function as the above - mentioned rubber gasket.

[0128] Embodiment 5 of the plugging device 100 of the present invention

[0129] The main technical features of the fifth embodiment are generally the same as those of the first embodiment above. The same parts of the fifth embodiment and the first embodiment will not be described in detail. The main difference between it and the first embodiment lies in: the specific structure of the locking structure 4 is different, and the relevant structures of the first connecting member 31 and the second connecting member 32 adapted to the locking structure 4 are correspondingly different.

[0130] In the fifth embodiment, as Figure 20 and Figure 21 shown, Figure 21 is a schematic diagram of the assembly principle of the fixed connection between the first connecting member 31 and the second connecting member 32 through the locking structure 4 in the fifth embodiment of the present invention. Exemplarily, the locking structure 4 includes a second buckle hole 47, a second buckle 48 and a limiting step (in this embodiment, this limiting step is defined as the fourth limiting step 49). Among them, the second buckle hole 47 is recessed in the outer wall of the second connecting member 32, the second buckle 48 has elasticity, and the second buckle 48 is arranged on the side wall of the first connecting member 31 or integrally formed on the first connecting member 31. In the natural state, the second buckle 48 extends laterally and obliquely into the third jack 313. Specifically, in this embodiment, the second buckle 48 gradually inclines towards the center of the third jack 313 from the proximal end to the distal end.

[0131] In addition, the fourth limiting step 49 is formed on the outer wall of the second connecting member 32, and the proximal end of the first connecting member 31 is axially provided with a third jack 313. When the first connecting member 31 is sleeved on the second connecting member 32, the proximal end of the second buckle 48 after being squeezed and returned is clamped in the second buckle hole 47, and the proximal end of the first connecting member 31 abuts axially against the fourth limiting step 49.

[0132] Exemplarily, as Figure 20 and Figure 21As shown in the figure, the first connecting member 31 and the second connecting member 32 are axially assembled. Specifically, the first connecting member 31 and the second connecting member 32 can approach each other axially. The distal end of the second connecting member 32 is inserted axially into the first jack 311 of the first connecting member 31, so that the proximal end of the first connecting member 31 is sleeved on the distal end of the second connecting member 32. During the axial forward movement of the distal end of the second connecting member 32 relative to the first connecting member 31, the second buckle 48 extending into the third jack 313 is radially withdrawn in a direction away from the center of the third jack 313 under the extrusion of the outer wall of the second connecting member 32, so that the distal end of the second connecting member 32 can continue to move smoothly towards the distal end. When the first connecting member 31 and the second connecting member 32 move relative to each other to a position where the second buckle 48 and the second buckle hole 47 are opposite, the second buckle 48 can rebound under its own resilience to extend from the third jack 313 into the first buckle hole 41 to be buckled with the first buckle hole 41, preventing the second connecting member 32 from retreating towards the proximal end relative to the first connecting member 31 and avoiding axial detachment of the two.

[0133] Preferably, the second buckle 48 is integrally formed on the first connecting member 31. The first connecting member 31 can be the proximal constraint member of the fixing portion 1. Since the proximal constraint member of the fixing portion 1 is usually made of a material with elasticity and good shape memory ability such as nickel-titanium alloy, it is beneficial to greatly simplify the structure of the connecting portion 3 and facilitate the separate manufacture and installation of the fixing portion 1 and the sealing portion 2. Further preferably, a barb structure can be provided at the free end of the second buckle 48, so as to better snap into and be restricted in the second buckle hole 47.

[0134] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A plugging device, characterized in that, It includes a fixing part, a sealing part, and a connecting part for connecting the fixing part and the sealing part. The connecting part includes: A first connecting member, connected to the proximal end of the fixing part; A second connecting member, connected to the distal end of the sealing part; The plugging device includes an initial state and an assembled state. In the initial state, the first connecting member and the second connecting member are independent of each other; in the assembled state, the first connecting member connects the second connecting member to connect the fixing part and the sealing part.

2. The plugging device according to claim 1, characterized in that, After the fixing part and the sealing part are connected, the axial relative position and the radial relative position of the fixing part and the sealing part are restricted by a locking structure.

3. The plugging device according to claim 2, characterized in that, The locking structure includes a first part and a second part. The first part is provided or connected to the first connecting member, and the second part is provided or connected to the second connecting member. In the assembled state, the first part and the second part are always in contact.

4. The plugging device according to claim 2, wherein, The locking structure includes a first buckle hole and a first buckle. One of the first connecting member and the second connecting member is provided with the first buckle hole, and the other is provided with the first buckle; in the assembled state, the first buckle extends into the first buckle hole.

5. The plugging device according to claim 4, characterized in that, The first buckle hole is formed in the side wall of the proximal end of the first connecting member, and the first buckle is provided at the distal end of the second connecting member. The first buckle can extend radially out of the side wall of the second connecting member; Alternatively, a first insertion hole is formed in the proximal end of the first connecting member in the radial direction. The insertion diameter of the first insertion hole is radially arranged, and the first insertion hole is a stepped hole with a smaller proximal aperture than the distal aperture. The first buckle extends axially toward the proximal end in the stepped hole, and the first buckle hole is recessed in the distal end of the second connecting member.

6. The plugging device according to claim 2, characterized in that, A second insertion hole is axially formed in the proximal end of the first connecting member. The insertion diameter of the second insertion hole is radially arranged, and the second insertion hole is a stepped hole with a smaller proximal aperture than the distal aperture; the locking structure includes a limit switch that can axially move to open or close the socket of the second insertion hole.

7. The plugging device according to claim 6, characterized in that, One end of the limit switch is fixed to the proximal end of the first connecting member by a spring. In the natural state, the spring maintains the limit switch to close the opening of the second insertion hole.

8. The plugging device according to claim 2, wherein, The locking structure includes a screwing structure, a limit step, and an anti - detachment spring ring. When the proximal end of the first connecting member and the distal end of the second connecting member are inserted into each other, the first connecting member is fixedly connected to the second connecting member through the screwing structure. And at the position where the first connecting member and the second connecting member are axially butted, the anti - detachment spring ring is sleeved on the first connecting member or the second connecting member provided with the limit step and axially abuts against the limit step.

9. The plugging device according to claim 1, wherein, At least one second buckle is provided on the inner side of the first connecting member. The second buckle inclines from the inner side wall of the first connecting member from the proximal end to the distal end toward the axis direction. At least one second buckle hole is provided on the side wall of the second connecting member. In the assembled state, the free end of the second buckle extends into the second buckle hole.

10. The plugging device according to any one of claims 1-9, characterized in that, A limit step is formed on the outer wall of the second connecting member. In the assembled state, the proximal end of the first connecting member axially abuts against the limit step.

Images