Delivery cables for occluder delivery devices and occluder delivery devices

Abstract

The application provides a conveying steel cable for an occluder conveying device and an occluder conveying device. The conveying steel cable for the occluder conveying device comprises a steel cable main body, the steel cable main body comprises a bolt head part and an elastic part, the bolt head part is used for being connected with an occluder, the elastic part is connected with the bolt head part, the elastic part comprises a plurality of spiral structures, the directions of rotation of at least two spiral structures are opposite, and the spiral structures with opposite directions of rotation are sleeved together inward and outward. An inner core is arranged in the elastic part and detachably connected with the bolt head part, and the rigidity of the inner core is higher than that of the elastic part. The application solves the problem of poor torsional force transmission of the conveying steel cable in the prior art.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a delivery cable for an occluder delivery device and an occluder delivery device. Background Technology

[0002] To better support the actual use of the sealing device, the delivery system must meet the different requirements of various application scenarios. For example, when the sealing device is retracted into the loader from the outside, the internal cable core must exhibit high rigidity so that the operator can apply tension evenly and smoothly retract it into the sheath. When the sealing device is pushed towards the far end of the delivery sheath after being retracted into the loader, the internal cable core must exhibit high rigidity so that the retracted sealing device can be pushed more smoothly into the delivery sheath. After the sealing device is fully released, the internal cable core connected to the sealing device must exhibit flexible characteristics to eliminate connection stress and ensure that the sealing device maintains a good sealing state before and after the internal cable core is released, thereby improving the effectiveness of the sealing device.

[0003] Existing conveyor cable connection sealing devices, after being pushed to the designated location and released, suffer from cable tension that prevents the sealing device from maintaining its final shape and position. After removing the cable, the sealing device is prone to deformation and displacement, and sometimes even the cable bolt head gets caught on the product. Current conveyor cables are primarily made of 304 stainless steel wire wound unidirectionally, with a 10-15 cm difference in hardness between the distal and distal ends, making it impossible to adjust the hardness of the distal end. Existing conveyor cables with adjustable or removable cores primarily consist of a single strand of metal wire wound unidirectionally, which suffers from poor torsional force transmission, easy longitudinal stretching and elongation, easy deformation at large bending angles, and the need for thicker wires, resulting in limited cable flexibility. Summary of the Invention

[0004] The main objective of this invention is to provide a conveying steel cable for a plugging device and a plugging device for conveying a plugging device, so as to solve the problem of poor torsional force transmission in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a conveying steel cable for a occluder conveying device is provided, comprising: a steel cable body, the steel cable body including a plug head and an elastic part, the plug head being for connection with an occluder, the elastic part being connected to the plug head, the elastic part including a plurality of helical structures, at least two of the helical structures having opposite directions of rotation, and the helical structures having opposite directions of rotation being inner and outer sleeved together; an inner core, the inner core being inserted inside the elastic part and detachably connected to the plug head, the rigidity of the inner core being higher than the rigidity of the elastic part.

[0006] Furthermore, along the radial direction of the helical structure, the helical directions of two adjacent helical structures are opposite to each other.

[0007] Furthermore, the spiral structure includes multiple metal wires, which are spirally wound and arranged in parallel with each other in the same spiral structure.

[0008] Furthermore, the wire diameter is 0.1-1.0 mm, the outer diameter of the spiral structure is 0.3-3.0 mm, and the number of strands of the same spiral structure is 2-10.

[0009] Furthermore, the plug head has a first thread for connection with the plugging device, and a second thread for connection between the inner core and the plug head, the tightening direction of the second thread being opposite to the tightening direction of the first thread.

[0010] Furthermore, the second thread includes a second external thread and a second internal thread. The end of the bolt head facing the elastic part is provided with a mounting hole, which has a second internal thread. The end of the inner core has a second external thread, and the second external thread and the second internal thread are threadedly engaged.

[0011] Furthermore, the plug head has a first thread for connection with the plugger, and the delivery cable also includes a fixing member, with one end of the inner core away from the plug head connected to the fixing member. There is a third thread for connection between the fixing member and the cable body, and the tightening direction of the third thread is opposite to that of the first thread.

[0012] Furthermore, the main body of the steel cable also includes a handle portion, which is connected to the end of the elastic portion away from the bolt head. The fixing member is connected to the handle portion, and a third thread is provided between the fixing member and the handle portion. The handle portion has a hollow structure for the inner core to pass through.

[0013] Furthermore, the third thread includes a third external thread and a third internal thread, the fastener includes a connecting section and an operating section, one of the handle portion and the connecting section has a third external thread, the other of the handle portion and the connecting section has a third internal thread, the third external thread and the third internal thread are threadedly engaged, and the operating section is located at the end face of the handle portion.

[0014] Furthermore, the inner core and the bolt head have a second thread for connection, the conveying cable also includes a fixing member, the inner core is connected to the fixing member, and the fixing member and the cable body have a third thread for connection, the axial length of the third thread is greater than the axial length of the second thread; and / or the pitch of the second thread is equal to the pitch of the third thread.

[0015] According to another aspect of the present invention, a plug delivery device is provided, comprising a delivery sheath, a loader, and the aforementioned delivery cable, wherein the loader is capable of being inserted into the delivery sheath, the delivery cable is capable of being inserted into the loader, and is delivered within the delivery sheath under the drive of the loader.

[0016] By applying the technical solution of this invention, the conveying steel cable is configured with a combination of a main body and an inner core. The main body of the steel cable incorporates an elastic section, the rigidity of which is lower than that of the inner core. The inner core can be inserted within the elastic section. During the delivery of the sealing device, the inner core can be inserted into the main body of the steel cable and connected to the sealing device via a bolt head. The rigidity of the inner core supports the main body of the steel cable, ensuring that the rigidity requirements for delivery are met. After delivery, the inner core can be removed from the main body of the steel cable. Because the elastic section has good flexibility, the main body of the steel cable is no longer supported by the inner core, thus eliminating connection stress and improving the effectiveness of the sealing device. Furthermore, this embodiment employs multiple spiral structures nested within the elastic section, with the spirals rotating in opposite directions. This ensures excellent torsional force transmission from the main cable. When rotating the main cable, torsional force transmission is virtually instantaneous and timely. Upon release of the plug, rotation around the axis does not deform the entire cross-sectional shape of the elastic section, resulting in uniform stress distribution along the length. This significantly reduces elastic deformation loss and rotational inertia loss, minimizing bending and twisting during cable rotation. The excellent synchronization of torsional force transmission ensures timely transmission of torsional force from the near end to the far end, effectively preventing rapid rebound of the cable or handle upon release and guaranteeing reliability. This design satisfies the rigidity and flexibility requirements of the conveying cable under different usage conditions while simultaneously improving torsional force transmission and preventing significant deformation, bending, or twisting. These two aspects work together to ensure stable and reliable delivery and release of the plug, guaranteeing safety and reliability in use. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of the transmission steel cable of the present invention is shown;

[0019] Figure 2 It shows Figure 1 Exploded view of the steel cable used for transmission;

[0020] Figure 3 It shows Figure 1 A schematic diagram of the structure of the transmission steel cable during the disassembly of the inner core;

[0021] Figure 4 It shows Figure 1 A schematic diagram of the elastic part in the middle;

[0022] Figure 5A schematic diagram of the plug delivery device of the present invention is shown;

[0023] Figure 6 It shows Figure 5 A schematic diagram of the delivery sheath in the middle;

[0024] Figure 7 It shows Figure 5 A schematic diagram of the loader in the diagram;

[0025] Figure 8 A schematic diagram of the expander is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. Steel cable body; 11. Bolt head; 111. First thread; 112. Second thread; 12. Elastic part; 121. Helical structure; 13. Handle part; 20. Inner core; 30. Fixing part; 31. Third thread; 40. Delivery sheath; 50. Loader; 60. Expander. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0031] To address the problem of poor torsional force transmission in existing technologies, this invention provides a conveying steel cable and a blocker conveying device for use in a blocker conveying device.

[0032] like Figures 1 to 4The cable shown is a conveying cable for a occluder delivery device, comprising a cable body 10 and an inner core 20. The cable body 10 includes a plug head 11 and an elastic part 12. The plug head 11 is used to connect with the occluder, and the elastic part 12 is connected to the plug head 11. The elastic part 12 includes a plurality of helical structures 121, at least two of which have opposite directions of rotation, and the helical structures 121 with opposite directions of rotation are arranged together inside and outside each other. The inner core 20 passes through the elastic part 12 and is detachably connected to the plug head 11. The rigidity of the inner core 20 is higher than that of the elastic part 12.

[0033] This embodiment uses a combination of a main cable 10 and an inner core 20 for the conveying cable. The main cable 10 incorporates an elastic section 12, which has a lower rigidity than the inner core 20. The inner core 20 can be inserted into the elastic section 12. During the conveying of the plug, the inner core 20 can be inserted into the main cable 10 and connected to the conveying plug via the bolt head 11. The rigidity of the inner core 20 supports the main cable 10, ensuring that the rigidity requirements for conveying are met. After the conveying is completed, the inner core 20 can be removed from the main cable 10. Since the elastic section 12 has good flexibility, the main cable 10 is no longer supported by the inner core 20, thus eliminating connection stress and improving the effectiveness of the plug. Furthermore, this embodiment employs multiple spiral structures 121 nested within the elastic part 12, with the spiral structures 121 rotating in opposite directions. This ensures excellent torsional force transmission from the main body 10 of the steel cable. When rotating the main body 10, the torsional force transmission is virtually instantaneous and timely. Upon release of the plug, rotation around the axis does not cause deformation of the entire cross-sectional shape of the elastic part 12, resulting in uniform stress distribution along the length. This significantly reduces elastic deformation loss and rotational inertia loss, minimizing bending and twisting during cable rotation. The excellent synchronization of torsional force transmission ensures timely transmission of torsional force from the near end to the far end, effectively preventing rapid rebound of the cable or handle upon release and guaranteeing reliable operation. This configuration satisfies the rigidity and flexibility requirements of the conveying cable under different usage conditions while simultaneously improving torsional force transmission and preventing significant deformation, bending, or twisting. These two aspects work together to ensure stable and reliable delivery and release of the plug, guaranteeing safety and reliability in use.

[0034] It should be noted that the spiral direction of the spiral structure 121 mentioned in this embodiment refers to the spiral direction of all spiral structures 121 determined according to a unified standard, such as the direction of the steel cable body 10 from the near end to the far end, or from the far end to the near end. As long as the determination standard is unified, the spiral direction of the spiral structure 121 can be guaranteed to be opposite.

[0035] In this embodiment, the elastic part 12 is essentially formed as a hollow spring tube structure. The hollow through hole in the center is used for the inner core 20 to pass through. The spring-like structure can give it a certain degree of elasticity and flexibility, thereby achieving the effect of the steel cable body 10 restoring its own flexibility after the inner core 20 is pulled out.

[0036] The number of spiral structures 121 can be set as needed, and two or more can be set. When two spiral structures 121 are set, their rotation directions are opposite. At this time, the two spiral structures 121 are radially adjacent and in contact with each other. This embodiment uses a method of setting two spiral structures 121, such as... Figure 4 As shown. When there are more than one spiral structure 121, in order to further improve the torsional force transmission effect, this embodiment adopts a radial arrangement where the spiral directions of adjacent spiral structures 121 are opposite to each other. That is, from the inside to the outside, the spiral directions of the spiral structures 121 are successively opposite. In this way, except for the innermost and outermost spiral structures 121, each other spiral structure 121 has spiral structures 121 with opposite directions of rotation on both its inner and outer sides. This allows it to be influenced by the surrounding spiral structures 121, thereby improving the anti-torsional effect and thus improving the overall torsional force transmission effect. Of course, the specific arrangement can also be adjusted as needed. For example, three spiral structures 121 can be used, where two spiral structures 121 with the same direction of rotation are arranged close to each other, and the other spiral structure 121 with the opposite direction of rotation is located on the innermost or outermost side.

[0037] Optionally, the spiral structure 121 includes multiple metal wires wound in a spiral shape, with the metal wires of the same spiral structure 121 arranged in parallel. Such a spiral structure 121 is formed by multiple parallel spiral metal wires, thus giving the spiral structure 121 a certain structural strength and avoiding the problem of easy twisting and deformation caused by a single metal wire. It improves the structural strength while ensuring flexibility, satisfying both flexibility and strength requirements. Through the aforementioned multi-strand, double-layer, bidirectional special structure, the elastic part 12 does not exhibit significant deformation or elongation when stretched. Therefore, the hollow spring tube of this structure can use metal wires with a much smaller diameter than conventional wires, achieving the effect of the steel cable body 10 being less prone to deformation at large bending angles and exhibiting excellent overall flexibility.

[0038] Optionally, the wire diameter is 0.1-1.0 mm, preferably 0.2 mm. The outer diameter of the spiral structure 121 is 0.3-3.0 mm, preferably 1.5 mm. The number of strands of the wire in the same spiral structure 121 is 2-10, preferably 4. This results in better overall structural performance of the elastic part 12. Of course, the above parameters can also be adjusted according to actual needs and are not limited to the data described in this embodiment.

[0039] It should be noted that, Figure 4The elastic section 12 is formed by stretching a portion of the elastic section 12. For a single helical structure 121, the number of strands of the metal wire is always consistent along the helical direction. The number of strands of the metal wire in the inner and outer helical structures 121 can be the same or different. The helix direction of adjacent helical structures 121 has the same angle with the cross-section. Of course, the angle between the helix direction of the helical structure 121 and the cross-section or the number of layers can be adjusted according to the actual needs of the flexibility of the main body 10 of the steel cable.

[0040] like Figures 1 to 3 As shown, in this embodiment, the plug head 11 has a first thread 111 for connection with the plug, and a second thread 112 for connection between the inner core 20 and the plug head 11, the tightening direction of the second thread 112 being opposite to the tightening direction of the first thread 111. Similarly, the conveying cable also includes a fixing member 30, the end of the inner core 20 away from the plug head 11 being connected to the fixing member 30, and a third thread 31 for connection between the fixing member 30 and the cable body 10, the tightening direction of the third thread 31 being opposite to the tightening direction of the first thread 111. Thus, the second thread 112 and the third thread 31 have the same direction of rotation, but opposite to the direction of rotation of the first thread 111. This allows for tightening the plug and plug head 11 together by rotating in the first direction when connecting the plug and plug head 11. When connecting the inner core 20 to the plug head 11 and the fixing member 30 to the cable body 10, tightening is done in the second direction, opposite to the first direction. During disassembly, the fixing member 30 is rotated in the first direction, causing the fixing member 30 to be tightened against the cable body 10. The threads are separated, and then the fixing member 30 is rotated further, causing the fixing member 30 to drive the inner core 20 to rotate in the first direction. The inner core 20 gradually separates from the threaded part of the plug head 11, thus achieving the disassembly of the inner core 20. During this process, since the first direction of rotation between the plug head 11 and the plug is the tightening direction, the plug head 11 will only maintain the connection with the plug and will not be disassembled. This ensures that the disassembly of the inner core 20 will not affect the connection between the plug head 11 and the plug, guaranteeing the smooth disassembly of the inner core 20. The rotation directions of the first thread 111, the second thread 112, and the third thread 31 can be set as needed, as long as their positive and negative relationships are maintained.

[0041] In this embodiment, the second thread 112 includes a second external thread and a second internal thread. A mounting hole is provided at the end of the plug head 11 facing the elastic part 12. The mounting hole has a second internal thread, and the end of the inner core 20 has a second external thread. The second external thread and the second internal thread are threadedly engaged. In this embodiment, the plug head 11 includes a large-diameter section and a small-diameter section connected sequentially. The small-diameter section has an external thread as the first thread 111. The end face of the large-diameter section away from the small-diameter section can be connected to the end of the elastic part 12 by welding. Simultaneously, a mounting hole is provided on the end face of the large-diameter section away from the small-diameter section, and the inner wall of the mounting hole has a second internal thread. Thus, the small-diameter section of the plug head 11 can be threadedly engaged with the plugging device, and the large-diameter section of the plug head 11 can be threadedly engaged with the end of the inner core 20, thereby achieving a detachable engagement between the plug head 11, the plugging device, and the inner core 20. Of course, the above-mentioned arrangement of the internal and external threads can also be interchanged, i.e., a second external thread can be provided on the outside of the large-diameter section of the plug head 11, and a first internal thread can be provided on the end of the inner core 20.

[0042] To facilitate welding between the bolt head 11 and the elastic part 12, this embodiment uses an outer diameter of the large diameter section of the bolt head 11 that is smaller than or equal to the inner diameter of the elastic part 12. This allows the large diameter section of the bolt head 11 to be connected to the end of the elastic part 12, and a portion of the large diameter section can extend into the elastic part 12, thereby making the welding between the bolt head 11 and the elastic part 12 more stable and reliable.

[0043] In this embodiment, the fixing member 30 is not directly connected to the elastic part 12, but rather through a handle part 13 located in the middle. Specifically, the steel cable body 10 also includes a handle part 13, which is connected to the end of the elastic part 12 away from the bolt head 11. The handle part 13 and the elastic part 12 can be connected by means of integral molding, thereby eliminating the need for handle screws in conventional methods, making the fixing method simple and reliable. The handle part 13 has a hollow structure for the inner core 20 to pass through, and a portion of one end of the elastic part 12 can extend into the hollow structure, thereby achieving a reliable connection with the handle part 13. Meanwhile, the fixing member 30 and the handle part 13 are detachably connected. A third thread 31 is provided between the fixing member 30 and the handle part 13. In this way, when the fixing member 30 is rotated, the fixing member 30 can be connected and disconnected from the handle part 13 through the third thread 31. Since the other end of the inner core 20 away from the bolt head 11 is connected to the fixing member 30, the movement of the fixing member 30 can drive the inner core 20 to move synchronously, thereby realizing the disassembly of the inner core 20.

[0044] Similarly, in this embodiment, the third thread 31 includes a third external thread and a third internal thread. The hollow structure of the handle portion 13 has a third internal thread at the end away from the bolt head 11, and the fixing member 30 has a third external thread. The third external thread and the third internal thread are threadedly engaged. The operating section is located at the end face of the handle portion 13. In this embodiment, the fixing member 30 includes a connecting section and an operating section. The connecting section can be integrally injection molded to connect with the inner core 20. The diameter of the connecting section is smaller than that of the operating section. The connecting section has a third external thread, which allows the connecting section to extend into the hollow structure to achieve threaded engagement between the third external thread and the third internal thread. The operating section does not extend into the hollow structure and is located on the outside of the handle portion 13, allowing the operator to easily operate the fixing member 30 and the inner core 20. Of course, the third external thread can also be located near the handle portion 13. The connecting section of the fixing member 30 has a hollow structure. In this case, the diameter of the connecting section and the operating section can be the same or different. The hollow structure has a third internal thread, as long as the handle portion 13 and the fixing member 30 can be stably connected. To ensure that the inner core 20 and the bolt head 11 are rotatably connected in place, the third thread 31 at the fixing member 30 adopts a redundancy design, that is, the axial length of the third thread 31 is greater than the axial length of the second thread 112, so that the third thread 31 has redundancy when the second thread 112 is tightened or untightened, ensuring that the second thread 112 can be fully tightened or untightened.

[0045] In this embodiment, the pitch of the third thread 31 and the second thread 112 are equal to ensure that the third thread 31 and the second thread 112 can move synchronously or relatively while the fixing member 30 is rotating and advancing or retracting, so as to avoid squeezing or stretching the inner core 20.

[0046] In this embodiment, the inner core 20 is formed by winding single or multiple strands of wire. The wire material can be stainless steel wire, nickel-titanium wire, platinum-nickel wire, platinum-tungsten wire, etc. In this embodiment, nickel-titanium wire with good hardness and toughness is preferred. Since multiple strands of wire have better torque transmission effect than single strands of wire, multiple strands of wire are preferred in this embodiment.

[0047] The occluder delivery device of this embodiment also includes a protective membrane located on the circumferential outer side of the steel cable body 10 and covering the steel cable body 10. The protective membrane's primary function is to prevent bleeding from the hemostatic valve of the loader 50 during use. The protective membrane can be made of materials such as FEP, PTFE, PE, or PET, and should cover the outer surface of the steel cable body 10 as evenly and compactly as possible, possessing good flexibility and having minimal impact on the rigidity of the delivery steel cable.

[0048] like Figures 5 to 7As shown, this embodiment also provides a occluder delivery device, including a delivery sheath 40, a loader 50, and the aforementioned delivery cable. The loader 50 can be inserted into the delivery sheath 40, and the delivery cable can be inserted into the loader 50, and is delivered within the delivery sheath 40 under the drive of the loader 50. The delivery cable of this embodiment features adjustable distal end stiffness, good torsional force, resistance to stretching and elongation, resistance to bending and deformation, and excellent overall flexibility, resulting in a superior user experience for the delivery device and ensuring that the shape and position of the occluder are consistent with the effect after the cable is removed.

[0049] In this embodiment, the delivery sheath 40 adopts a three-layer composite structure. The inner layer is made of polytetrafluoroethylene, the middle layer is made of 304 stainless steel wire mesh, and the outer layer is made of nylon elastic foam material Pebax. A contrasting material is added. A contrasting ring is provided at the distal end of the delivery sheath 40. The connector is made of ABS plastic, the marking tube is made of polyurethane (PU), the end cap is made of ABS plastic, the hemostatic valve is made of silicone rubber, the side tube is made of PVC plastic, the three-way switch valve is made of high-density polyethylene (HDPE), and the three-way switch seat is made of polycarbonate (PC).

[0050] In this embodiment, the loader 50 tube body is made of high-density polyethylene (HDPE) and is semi-transparent in color; the connector is made of ABS plastic; the marking tube is made of polyurethane (PU); the end cap is made of ABS plastic; the hemostatic valve is made of silicone rubber; the side tube is made of PVC plastic; the three-way switch valve is made of high-density polyethylene (HDPE); and the three-way switch base is made of polycarbonate (PC).

[0051] like Figure 8 As shown, the occluder delivery device of this embodiment also includes an expander 60. The expander 60 can be inserted into the delivery sheath 40 between the loader 50 and the delivery sheath 40, thereby expanding the delivery sheath 40. After expansion, the expander 60 can be removed and inserted into the loader 50 which contains the occluder and delivery device. The main body material of the expander 60 in this embodiment is high-density polyethylene (HDPE), and the joint material is also high-density polyethylene (HDPE).

[0052] The usage process of the plug delivery device in this embodiment is as follows:

[0053] Before use, the inner core 20 is rotated and connected to the bolt head 11, and the fixing part 30 is rotated and connected to the handle part 13 in a synchronous manner, so that the components for conveying steel cables are connected as a whole.

[0054] In use, the plug head 11 is rotatably connected to the nut of the plug. The plug is then retracted into the loader 50 by pulling back the main body 10 of the steel cable. During this process, the inner core 20 and the main body 10 of the steel cable form a single unit, ensuring the conveying steel cable has sufficient rigidity for smooth retraction into the loader 50. After the loader 50 is connected to the conveying sheath 40, the plug is pushed to the location to be plugged by pushing the main body 10 of the steel cable. During this process, the inner core 20 remains integral with the main body 10 of the steel cable, ensuring the conveying steel cable has sufficient rigidity for smooth pushing. When the plug is fully released, the inner core 20 is disengaged from the plug head 11 by rotating the fixing member 30 in the opposite direction. Simultaneously, the fixing member 30 is also disengaged from the handle part 13. Due to the design of the thread direction, this operation will not cause the plug head 11 to accidentally detach from the plug. Pull the released fixing member 30 outwards, and the inner core 20 will separate from the steel cable body 10. During this process, the elastic part 12 of the steel cable body 10, having lost the support of the inner core 20, possesses good bending flexibility, which also gives the plug head 11 good flexibility, eliminating the stress connected to the plug and ensuring that the plug is in a more natural unfolded state. Finally, rotate the handle 13 to release the steel cable body 10 from the plug, pull back the delivery sheath 40 to withdraw from the entire delivery system, and the operation is complete.

[0055] It should be noted that "multiple" in the above embodiments refers to at least two.

[0056] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0057] 1. This technology solves the problem of poor torsional force transmission in existing steel cables;

[0058] 2. When connected, the inner core and the main body of the steel cable form an integral whole, ensuring that the conveying steel cable has good rigidity. When released and withdrawn, the inner core separates from the main body of the steel cable, ensuring that the far end of the main body of the steel cable has good flexibility, thereby eliminating connection stress and improving the effectiveness of the sealing device.

[0059] 3. The main body of the steel cable has a good effect on transmitting torsional force. When the main body of the steel cable is rotated, the torsional force is transmitted with almost no delay and the torsional force is transmitted in a timely manner.

[0060] 4. When the plug is released, the rotation around the axis will not cause the entire cross-sectional shape of the elastic part to deform. The stress distribution along the length direction is uniform, which greatly reduces the loss of elastic deformation and rotational inertia. During the rotation of the main body of the steel cable, bending and twisting are not easy to occur, and the torsional force transmission synchronization is excellent.

[0061] 5. Effectively prevents the steel cable or handle from rebounding rapidly during release, ensuring reliable use;

[0062] 6. To prevent the sealing device from being accidentally released when the inner core is rotated and released from the main body of the steel cable, thus ensuring the safety of use;

[0063] 7. The third thread has redundancy to ensure that the second thread can be fully tightened or loosened;

[0064] 8. Ensure that the third and second threads can move synchronously or relative to each other while the fastener is rotating and advancing or retracting, so as to avoid squeezing or stretching the inner core.

[0065] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0066] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0067] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A conveying steel cable for a plugging device conveying apparatus, characterized in that, include: The steel cable body (10) includes a bolt head (11) and an elastic part (12). The bolt head (11) is used to connect with the plug, and the elastic part (12) is connected to the bolt head (11). The elastic part (12) includes a plurality of spiral structures (121), at least two of the spiral structures (121) have opposite directions of rotation, and the spiral structures (121) with opposite directions of rotation are fitted together inside and outside. The inner core (20) is inserted into the elastic part (12) and is detachably connected to the bolt head (11). The rigidity of the inner core (20) is higher than that of the elastic part (12). The plug head (11) has a first thread (111) for connection with the plug, and a second thread (112) for connection between the inner core (20) and the plug head (11), wherein the tightening direction of the second thread (112) is opposite to the tightening direction of the first thread (111); The transmission cable also includes a fixing member (30), and the end of the inner core (20) away from the bolt head (11) is connected to the fixing member (30). The fixing member (30) and the cable body (10) have a third thread (31) for connection. The tightening direction of the third thread (31) is opposite to the tightening direction of the first thread (111). The main body (10) of the steel cable also includes a handle (13), which is connected to the end of the elastic part (12) away from the bolt head (11). The fixing member (30) is connected to the handle (13), and the fixing member (30) and the handle (13) are provided with the third thread (31). The handle (13) has a hollow structure for the inner core (20) to pass through.

2. The steel cable for transmission according to claim 1, characterized in that, Along the radial direction of the spiral structure (121), the spiral directions of two adjacent spiral structures (121) are opposite to each other.

3. The steel cable for transmission according to claim 1, characterized in that, The spiral structure (121) includes multiple metal wires, which are spirally wound and arranged in parallel with each of the metal wires in the same spiral structure (121).

4. The steel cable for transmission according to claim 3, characterized in that, The diameter of the metal wire is 0.1-1.0 mm, the outer diameter of the spiral structure (121) is 0.3-3.0 mm, and the number of strands of the metal wire in the same spiral structure (121) is 2-10.

5. The transmission cable according to any one of claims 1 to 4, characterized in that, The second thread (112) includes a second external thread and a second internal thread. The bolt head (11) has a mounting hole at one end facing the elastic part (12). The mounting hole has a second internal thread. The end of the inner core (20) has a second external thread. The second external thread and the second internal thread are threaded together.

6. The transmission cable according to any one of claims 1 to 4, characterized in that, The third thread (31) includes a third external thread and a third internal thread. The fastener (30) includes a connecting section and an operating section. One of the handle portion (13) and the connecting section has the third external thread, and the other of the handle portion (13) and the connecting section has a third internal thread. The third external thread and the third internal thread are threadedly engaged. The operating section is located at the end face of the handle portion (13).

7. The transmission cable according to any one of claims 1 to 4, characterized in that, The axial length of the third thread (31) is greater than the axial length of the second thread (112); and / or The pitch of the second thread (112) is equal to the pitch of the third thread (31).

8. A plugging device delivery apparatus, characterized in that, The device includes a delivery sheath (40), a loader (50), and a delivery cable according to any one of claims 1 to 7, wherein the loader (50) is capable of being inserted into the delivery sheath (40), and the delivery cable is capable of being inserted into the loader (50) and is delivered within the delivery sheath (40) under the drive of the loader (50).

Images