Conveying device and conveying system

Abstract

The utility model provides a conveying device and a conveying system, the conveying device comprises a conveying steel cable, the conveying steel cable is provided with a main body section and a reducing section, the reducing section is located at the first end side of the conveying steel cable, and the first diameter of the reducing section is smaller than the second diameter of the main body section; the conveying steel cable further comprises a connecting bolt head and an inner inserting core, the first end of the connecting bolt head is provided with an implant connecting part, the second end of the connecting bolt head is connected with the first end of the conveying steel cable, the inner inserting core can be arranged in the conveying steel cable in a penetrating mode, and the first end of the inner inserting core is detachably connected with the connecting bolt head. The conveying system comprises a conveying device, and the conveying device can improve the accuracy of the implantation position of the implant and ensure the plugging effect.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a conveying device and a conveying system equipped with the conveying device. Background Technology

[0002] Delivery cables are a crucial component of structural cardiac stent delivery products. Currently, most delivery cables used in structural cardiac stent products are made of 304 stainless steel. Their operating principle involves connecting the distal end of the delivery cable to the implant, guiding the implant through a sheath to the designated location, then controlling the separation of the delivery cable from the implant to release it, and finally withdrawing the cable and sheath. However, existing delivery cables have the following shortcomings:

[0003] Currently, all delivery cables used in clinical practice, regardless of size, are one-piece structures. This means that the cable's flexibility is not adjustable, and it needs to have a certain degree of rigidity to ensure reliable movement of the implant within the sheath, pushing it out of the distal end of the sheath and to the release position. However, after the implant is pushed out of the distal end of the sheath, the rigidity of the delivery cable makes it impossible to accurately determine the actual implantation position and shape before release. The clinician must rely entirely on experience and the surrounding tissues to determine the actual implantation position, thus posing a risk of incomplete occlusion due to the implant failing to reach the intended position. Summary of the Invention

[0004] To address the aforementioned problems, the main objective of this invention is to provide a delivery device that can improve the accuracy of implant placement and ensure effective sealing.

[0005] Another objective of this invention is to provide a conveying system equipped with the aforementioned conveying device.

[0006] To achieve the main objective of this utility model, this utility model provides a conveying device, including a conveying steel cable, wherein the conveying steel cable has a main body section and a variable diameter section, the variable diameter section is located at the first end of the conveying steel cable, and the first diameter of the variable diameter section is smaller than the second diameter of the main body section; the conveying steel cable also includes a connecting bolt head and an inner insert, the first end of the connecting bolt head has an implant connection part, the second end of the connecting bolt head is connected to the first end of the conveying steel cable, and the inner insert can be inserted into the conveying steel cable, the first end of the inner insert is detachably connected to the connecting bolt head.

[0007] As can be seen from the above, the inner insert can alter the flexibility of the delivery cable. The section of the delivery cable into which the inner insert is inserted becomes more rigid. Therefore, with the cooperation of the inner insert, during the delivery of the implant, the inner insert is inserted into the delivery cable and connected to the connecting bolt, resulting in a higher overall rigidity of the delivery device. This reliably delivers the implant to the designated position. When the implant needs to be released, the inner insert separates from the connecting bolt and retracts a certain distance, allowing the section of the delivery cable not penetrated by the inner insert to regain its original flexibility. This ensures accurate implantation and guarantees the sealing effect. Through the design of the delivery device, the delivery cable can achieve a higher degree of flexibility compared to existing delivery cables, thereby improving the cable's adaptive deformation capability.

[0008] A preferred embodiment is that the first length of the variable diameter section is between 10 cm and 16 cm.

[0009] As can be seen from the above, the length design of the variable diameter section enables the delivery cable to adapt to the complex environment of blood vessels and organs, thereby achieving precise implantation of the implant at the pre-closure position and ensuring the closure effect.

[0010] A further option is that the first end of the variable diameter section is connected to the second end of the connecting bolt, and the second end of the variable diameter section is connected to the first end of the main body section; or the main body section has a first segment and a second segment, the first end of the first segment is connected to the second end of the connecting bolt, the variable diameter section is connected between the second end of the first segment and the first end of the second segment, and the second length of the first segment is between 10 cm and 15 cm.

[0011] As can be seen from the above, the relative position design of the variable diameter section and the main body section allows the delivery cable to adapt to different blood vessels and organ environments, meet different surgical requirements, and ensure that the delivery cable can meet the angle adjustment requirements through its own adaptive deformation ability under the guidance and limitation of blood vessels, organs and / or sheaths, so that the implant can be accurately inserted into the pre-occlusion position.

[0012] A further proposed solution is that the first end of the variable diameter section can be bent relative to the second end of the variable diameter section, with the bending angle ranging from 60° to 180°.

[0013] As can be seen from the above, this design enables the variable diameter section to meet a wide range of angle adjustment requirements, so that the delivery device can be basically applied to various complex vascular and organ environments.

[0014] A further proposed solution is that the main body section and the variable diameter section are integrally spirally wound; the first winding pitch of the main body section is less than or equal to the second winding pitch of the variable diameter section.

[0015] As can be seen from the above, the design ensures that the flexibility of the variable diameter section is higher than that of the main body section, so that different sections of the conveying steel cable can have different degrees of flexibility. This gives the conveying steel cable a certain degree of rigidity to support and limit the implant, ensuring the accuracy of the implantation position, and also ensuring the adaptive deformation capability of the conveying steel cable to prevent the implantation position from shifting after the implant is released.

[0016] Another preferred embodiment is that the connecting bolt head has a socket recessed inward from the second end of the connecting bolt head in the axial direction, and the first end of the inner insert can be inserted into the socket; or the connecting bolt head has a first threaded hole recessed inward from the second end of the connecting bolt head in the axial direction, and the first end of the inner insert has a first external thread section, which can be inserted into the first threaded hole; or the second end of the connecting bolt head is provided with a first magnet, and the first end of the inner insert has a second magnet, and the first magnet and the second magnet generate an attractive magnetic force.

[0017] As can be seen from the above, the above designs are all conducive to the rapid separation between the connecting plug and the inner core, and can reduce the impact on the current position of the implant when the inner core is separated from the connecting plug, thus avoiding the displacement of the current position of the implant.

[0018] A further solution is that when the connector head has a socket, the bottom of the socket is a first hemisphere, the first end face of the inner core is a second hemisphere, the second hemisphere has a similar outline to the first hemisphere, and the second hemisphere can fit into the first hemisphere.

[0019] As can be seen from the above, the second hemisphere design of the inner insert facilitates the insertion of the inner insert into the socket. At the same time, the first hemisphere of the socket allows the inner insert to fit more tightly with the connecting plug, so that the delivery device can more stably deliver and initially position the implant.

[0020] A further proposed solution is to use a screw as the implant connector; when the connector head has a first threaded hole, the screw thread has the opposite helical direction to the first external thread segment.

[0021] As can be seen from the above, this design ensures that the connection between the connector and the implant remains reliable when the internal insert and the connector head are unscrewed, preventing loosening or separation between the connector head and the implant.

[0022] A further embodiment includes a handle sleeve and an operating handle. The first end of the handle sleeve is connected to the second end of the conveying steel cable. The handle sleeve has a second threaded hole. The operating handle has an operating part and an overlapping part. The overlapping part is connected between the operating part and the second end of the inner core. The overlapping part has a second external threaded section, which can be inserted into the second threaded hole. The operating handle can control the inner core to connect or disconnect from the connecting bolt head. The operating handle can also control the movement of the inner core relative to the conveying steel cable.

[0023] As can be seen from the above, the design of the handle sleeve and operating handle makes it easier for the operator to control the separation of the inner insert and the connecting plug. It also helps to ensure that the delivery device can reliably deliver the implant until the inner insert and the connecting plug are reliably connected, thereby ensuring reliable delivery of the implant.

[0024] To achieve another objective of this utility model, this utility model provides a conveying system, including a sheath, which further includes the aforementioned conveying device, and a conveying steel cable can be threaded inside the sheath.

[0025] As can be seen from the above, the delivery system is equipped with the aforementioned delivery device, which enables it to implant the implant more accurately and safely into the pre-sealing position. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the first embodiment of the conveying device of this utility model.

[0027] Figure 2 This is a structural diagram of the conveying steel cable of the first embodiment of the conveying device of this utility model.

[0028] Figure 3 This is a structural diagram of the connecting bolt head of the first embodiment of the conveying device of this utility model.

[0029] Figure 4 This is a cross-sectional view of the connecting bolt head of the first embodiment of the conveying device of this utility model.

[0030] Figure 5 This is a structural diagram of the inner insert of the first embodiment of the conveying device of this utility model.

[0031] Figure 6 This is a structural diagram of the handle sleeve of the first embodiment of the conveying device of this utility model.

[0032] Figure 7 This is a structural diagram of the operating handle of the first embodiment of the conveying device of this utility model.

[0033] Figure 8 This is a structural diagram of the conveying steel cable of the second embodiment of the conveying device of this utility model.

[0034] Figure 9This is a cross-sectional view of the connecting bolt head of the third embodiment of the conveying device of this utility model.

[0035] Figure 10 This is a structural diagram of the inner insert core of the third embodiment of the conveying device of this utility model.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0037] First embodiment of the conveying device

[0038] Reference Figure 1 The conveying device 100 includes a conveying steel cable 1, a connecting bolt head 2, an inner core 3, a handle sleeve 4, and an operating handle 5.

[0039] Combination Figure 2 The delivery cable 1 has a main body section 11 and a variable diameter section 12. The variable diameter section 12 is located at the first end of the delivery cable 1, wherein the first diameter D1 of the variable diameter section 12 is smaller than the second diameter D2 of the main body section 11. By designing the diameters of the main body section 11 and the variable diameter section 12, the flexibility of the main body section 11 and the variable diameter section 12 is different. Specifically, the flexibility of the variable diameter section 12 is greater than that of the main body section 11. This allows the delivery cable 1 to adaptively deform according to blood vessels and / or organs. In particular, under the action of the variable diameter section 12, the delivery cable 1 can adapt to the complex structure of blood vessels and organs (such as blood vessels with multiple bends or small bends, or the ventricular structure of the heart). This allows the surgeon to more intuitively and accurately judge the actual implantation position and shape of the implant after release through monitoring instruments, thereby ensuring the accurate implantation position and achieving the ideal occlusion effect.

[0040] Combination Figure 3 and Figure 4 The first end of the connecting plug head 2 has an implant connecting portion 21, which is used for detachable connection with the implant, so that the delivery cable 1 can deliver the implant to a preset sealing position and the delivery device 100 can release the implant. In this embodiment, the implant connecting portion 21 is a screw to ensure the reliability of the connection between the implant and the connecting plug head 2. In addition, the third diameter D3 of the implant connecting portion 21 is smaller than the fourth diameter D4 of the body 20 of the connecting plug head 2.

[0041] The second end of the connecting bolt head 2 is connected to the first end of the conveying steel cable 1; in this embodiment, the main body section 11 has a first segment 111 and a second segment 112, the first end of the first segment 111 is connected to the second end of the connecting bolt head 2, and the variable diameter section 12 is connected between the second end of the first segment 111 and the first end of the second segment 112.

[0042] In some embodiments, the second end of the connecting bolt 2 can be directly and fixedly connected to the first end of the first segment 111 by welding.

[0043] In other embodiments, in order to facilitate the welding of the connecting bolt head 2 and the first segment 111, the fourth diameter D4 of the main body 20 of the connecting bolt head 2 can be made smaller than the inner diameter of the first segment 111, which is conducive to the first segment 111 being fitted on the outer periphery of the main body 20, so that the main body 20 and the first segment 111 can be welded and fixed more reliably and stably.

[0044] The second length L2 of the first segment 111 is preferably between 10 cm and 15 cm. Since the rigidity of the main body segment 11 is greater than that of the variable diameter segment 12, the first segment 111 is connected to the connecting bolt 2 and the length design of the first segment 111 is matched so that the conveying steel cable 1 can provide appropriate and reliable support for the connecting bolt 2. Due to the presence of the variable diameter segment 12, the support will not cause unpredictable positional deviation of the implant during the release of the implant, nor will it cause positional deviation due to insufficient support force on the implant, thereby ensuring that the implant can be accurately inserted into the pre-sealing position.

[0045] In some embodiments, the first length L1 of the variable diameter section 12 is preferably between 10 cm and 16 cm. The length design of the variable diameter section 12 allows the delivery cable 1 to adapt to complex vascular and organ environments, ensuring accurate implantation of the implant at the pre-occlusion position and guaranteeing the occlusion effect.

[0046] Furthermore, the design of the variable diameter section 12 allows the first end of the variable diameter section 12 to be bent relative to the second end of the variable diameter section 12; for example, in this embodiment, the first segment 111 can be bent relative to the second segment 112 via the variable diameter section 12. In some embodiments, the bending angle α can be between 60° and 180°. It is evident that the variable diameter section 12 allows a wide range of angle adjustment requirements to be met locally in the transport cable 1, thereby enabling the transport device 100 to be basically applicable to various complex vascular and organ environments.

[0047] The main body section 11 and the variable diameter section 12 of the conveying steel cable 1 are integrally spirally wound. In this embodiment, a single wire is spirally wound to the required length for the first segment 111, then to the required length for the variable diameter section 12, and finally to the required length for the second segment 112. This makes the main body section 11 and the variable diameter section 12 an integral structure, and no additional connection or fixation is required between the variable diameter section 12 and the first and second segments 111. It is understood that the above winding sequence is one possible sequence. Other possible sequences, such as in some embodiments, may involve spirally winding a single wire to the required length for the second segment 112, then to the required length for the variable diameter section 12, and finally to the required length for the first segment 111. In addition, since the main body section 11 and the variable diameter section 12 of the conveying steel cable 1 are integrally spirally wound, it can be known that the middle part of the formed conveying steel cable 1 is hollow, that is, the middle part of the conveying steel cable 1 has a channel 10, which runs through the conveying steel cable 1 along the extension direction of the conveying steel cable 1.

[0048] Furthermore, in some embodiments, the aforementioned filament can be a single strand (i.e., a single, relatively thick filament). In other embodiments, the aforementioned filament can be multiple strands (i.e., multiple strands) of relatively thin filament twisted together to form a relatively thick filament, which is then spirally wound to form the aforementioned conveyor cable 1. The advantage of using multiple strands of relatively thin filament twisted together to form a relatively thick filament and then spirally wound to form the conveyor cable 1 is that it can both ensure the flexibility of the conveyor cable 1 and improve its structural strength. In still other embodiments, the filament used to wind the conveyor cable 1 is also formed from multiple strands of thin filament, which are distributed in parallel spirals. This can be understood as each individual thin filament being spirally arranged, and the multiple spirally arranged thin filaments forming the relatively thick filament constitute the conveyor cable 1. The filament can be nickel-titanium wire, platinum-nickel wire, platinum-tungsten wire, or stainless steel, etc. In this embodiment, nickel-titanium wire is preferred.

[0049] To ensure that the flexibility of the variable diameter section 12 is higher than that of the main body section 11, so that different sections of the delivery cable 1 can have different levels of flexibility, the first winding pitch of the main body section 11 is smaller than the second winding pitch of the variable diameter section 12, meaning that the winding density of the main body section 11 is higher than that of the variable diameter section 12. Of course, as another optional solution, the first winding pitch of the main body section 11 can also be equal to the second winding pitch of the variable diameter section 12. The design of the first diameter D1 of the variable diameter section 12 and the second diameter D2 of the main body section 11 allows the delivery cable 1 to support and limit the implant through the relatively rigid main body section 11, ensuring the implant can be reliably pushed to the preset sealing position. The relatively flexible variable diameter section 12 allows the delivery cable 1 to better adapt and deform when there is no inner insert 3 inside, enabling micro-angle adjustment and preventing displacement of the implant position after release.

[0050] Combination Figure 5 The inner insert 3 can be inserted into the channel of the conveying steel cable 1, and the inner insert 3 can move relative to the conveying steel cable 1 in the extension direction of the conveying steel cable 1 to achieve connection or separation with the connecting bolt 2; that is, the connection between the inner insert 3 and the connecting bolt 2 is a detachable connection. The inner insert 3 can change the overall flexibility of the conveying steel cable 1. It can be understood that when the inner insert 3 is inserted into the channel, the hardness of the section of the conveying steel cable 1 through which the inner insert 3 is inserted will be greater than the hardness of the section of the conveying steel cable 1 without the inner insert 3 being inserted. In some embodiments, the flexibility of the inner insert 3 is less than the flexibility of the main body section 11 of the conveying steel cable 1.

[0051] In this embodiment, the connecting plug 2 has a insertion hole 22, which is recessed into the connecting plug 2 from its second end in the axial direction. This allows the first end of the inner insert 3 to be inserted into the insertion hole 22, establishing a reliable connection between the inner insert 3 and the connecting plug 2. This design also ensures that the delivery device 100 exhibits high rigidity (i.e., low flexibility) in this state, enabling the delivery device 100 to reliably push the implant to the preset occlusion position. Furthermore, this design makes the assembly and disassembly of the connecting plug 2 and the inner insert 3 more convenient and faster, while also reducing the impact on the current position of the implant when the inner insert 3 separates from the connecting plug 2, thereby preventing displacement of the implant's current position.

[0052] Furthermore, the end face of the first end of the inner insert 3 can be set to form a second hemispherical surface 31, so as to guide the first end of the inner insert 3 when it is inserted into the socket 22 of the connecting head 2, thereby making the operation more convenient when the first end of the inner insert 3 is inserted into the socket 22. Furthermore, to enable a tighter fit between the inner insert 3 and the insertion hole 22, and to allow the delivery device 100 to more stably deliver and initially position the implant, the bottom of the insertion hole 22 is designed as a first hemisphere 221. The first hemisphere 221 has a similar outline to the second hemisphere 31 of the inner insert 3. This allows the inner insert 3 to be inserted into the insertion hole 22, and the second hemisphere 31 to fit tightly against the first hemisphere 221. This allows for more precise control of the connecting plug head 2 to move the implant, ensuring accurate implantation. In particular, when the spiral winding structure of the main body section 11 and the split sections has gaps (i.e., there is a non-zero gap between two adjacent turns of wire, indicating a non-adjacent state), this design can prevent the delivery cable 1 from being compressed in its extension direction, ensuring that the implant can be accurately implanted into the pre-sealing position and reducing uncontrollable risks during the operation.

[0053] Combination Figure 6 The first end of the handle sleeve 4 is connected to the second end of the conveying steel cable 1. The connection method includes, but is not limited to, adhesive fixing, interference fit, threaded connection, etc.; the handle sleeve 4 has a second threaded hole 41.

[0054] Combination Figure 7 The operating handle 5 has an operating part 51 and an overlapping part 52, with the overlapping part 52 connecting the operating part 51 and the second end of the inner insert 3. The connection methods between the inner insert 3 and the overlapping part 52 include, but are not limited to, adhesive bonding, interference fit, and threaded connection. The overlapping part 52 has a second external thread section 521. When the operating handle 5 is assembled with the handle sleeve 4, the operating part 51 is located outside the handle sleeve 4, the overlapping part 52 is inserted into the second threaded hole 41, and the second external thread section 521 is threadedly connected to the second threaded hole 41. When the second external thread section 521 is screwed tightly into the second threaded hole 41, under the action of the operating handle 5, the second hemispherical surface 31 of the inner insert 3 can move to fit tightly against the first hemispherical surface 221 of the insertion hole 22.

[0055] In some embodiments, the thread of the second external thread section 521 is opposite in direction to the thread of the screw of the connecting plug head 2 (i.e., the implant connection part 21), so that when the operating handle 5 operates to unscrew the second external thread section 521 and the second threaded hole 41, the threaded connection between the connecting plug head 2 and the implant is not affected, ensuring that the connecting plug head 2 and the implant still maintain a reliable connection and preventing loosening or separation between the connecting plug head 2 and the implant; similarly, when the overlapping part 52 and the inner insert 3 are threadedly connected, the direction of the thread structure of the threaded connection is opposite to the direction of the thread of the second external thread section 521; the understanding of the thread direction is common knowledge to those skilled in the art, so it will not be elaborated on here.

[0056] Both the handle sleeve 4 and the operating handle 5 are preferably made of polymer material and molded by injection molding process, so that the handle sleeve 4 has an assembly structure for connecting with the conveying steel cable 1 and the operating handle 5 has an assembly structure for connecting with the inner core 3, thereby making the assembly simpler and more convenient.

[0057] By connecting the handle sleeve 4 to the delivery cable 1 and the operating handle 5 to the inner insert 3, the surgeon can quickly separate the inner insert 3 from the connecting plug 2 during the operation using the handle sleeve 4 and the operating handle 5, and easily control the retraction of the inner insert 3 relative to the connecting plug 2. At the same time, when the delivery device 100 pushes the implant to the preset sealing position, the cooperation of the handle sleeve 4 and the operating handle 5 ensures that the inner insert 3 always maintains a reliable connection with the connecting plug 2, thus eliminating the surgeon's need to focus on maintaining the connection between the inner insert 3 and the connecting plug 2 (such as in this embodiment, keeping the inner insert 3 always inserted in the insertion hole 22 and ensuring that the second hemisphere 31 of the inner insert 3 is tightly fitted with the first hemisphere 221 of the insertion hole 22), and ensuring reliable pushing of the implant.

[0058] When it is necessary to implant the implant, first connect the implant to the connecting head 2; at this time, the inner core 3 is connected to the connecting head 2 (for example, in this embodiment, the inner core 3 is inserted into the socket 22, and the second hemisphere 31 of the inner core 3 is in close contact with the first hemisphere 221 of the socket 22).

[0059] Next, guided by the sheath, the delivery device 100 pushes the implant along the sheath until it is pushed out of the sheath and roughly reaches the preset sealing position; then, based on the image displayed by the monitoring instrument, the required distance, position and structure of the implant to be sealed are determined.

[0060] Next, when releasing the implant, based on the image fed back by the monitoring instrument, the operating handle 5 is rotated to separate it from the handle sleeve 4; then, the inner insert 3 is pulled out by the operating handle 5, so that the first end of the inner insert 3 moves a preset distance in the extension direction of the conveying steel cable 1 (at this time, along the retraction direction of the inner insert 3, the first end of the inner insert 3 basically crosses the diameter-changing section 12), so that the inner insert 3 is disconnected from the connection head 2 (for example, in this embodiment, the inner insert 3 is pulled out from the insertion hole 22 of the connection head 2). As the inner core 3 retracts, the section of the delivery cable 1 not penetrated by the inner core 3 regains its flexibility (such as the first segment 111, the variable diameter segment 12, and part of the second segment 112 in this embodiment). Therefore, under the influence of the implant's own weight and / or the structural influence of blood vessels and / or organs, the section of the delivery cable 1 not penetrated by the inner core 3 can adaptively deform according to the surrounding structure of the sealing position, so that the position of the implant during and after release is not affected by the delivery cable 1, ensuring that the implant is in a more natural unfolded state and that the implant is accurately placed in the preset sealing position.

[0061] Next, control the handle sleeve 4 to separate the connecting plug head 2 from the implant; finally, withdraw the delivery device 100 from the sheath and remove the sheath from the patient's body.

[0062] In summary, the design of the delivery device 100 enables the delivery cable 1 to achieve adaptive angle adjustment during implantation, and makes the release of the implant during the operation easier and more convenient. Furthermore, since the section of the delivery cable 1 not penetrated by the inner core 3 can achieve multiple angle changes according to different pre-sealing position structures, the implant can achieve precise sealing, reducing the risk of repeated sealing, and has no adverse effects on the patient.

[0063] Second embodiment of the conveying device

[0064] Reference Figure 8 The difference between this embodiment and the first embodiment of the conveying device lies in the relative position between the main body section and the variable diameter section of the conveying cable, and the connection between the conveying cable and the connecting bolt. Specifically, in this embodiment:

[0065] The main body section 61 of the conveying steel cable 6 no longer includes the first segment and the second segment; it can be understood that the main body section 61 preferably has only one segment. Under this design, the first end of the variable diameter section 62 is connected to the second end of the connecting bolt, and the second end of the variable diameter section 62 is connected to the first end of the main body section 61. Similarly, the second end of the connecting bolt can be directly and fixedly connected to the first end of the variable diameter section 62 by welding.

[0066] Since the diameter of the reducing section 62 is relatively small, in some embodiments, a countersunk hole can be added to the connecting bolt head. This countersunk hole is recessed into the insertion hole from the opening of the insertion hole (i.e., the first end of the connecting bolt head) in the axial direction of the connecting bolt head, so that a countersunk hole structure is formed between the countersunk hole and the insertion hole. The countersunk hole is a countersunk head, and the insertion hole is a straight hole. At this time, the first end of the reducing section 62 is inserted into the countersunk hole, and the first end of the reducing section 62 and the countersunk hole are preferably interference fit. Then, the reducing section 62 and the countersunk hole are further fixed by welding to make the connection between the reducing section 62 and the connecting bolt head more secure.

[0067] Correspondingly, when the conveying steel cable 6 is wound with wire, a single wire is first wound in a spiral structure to the required length of the variable diameter section 62, and then wound in a spiral structure to the required length of the main body section 61. This makes the main body section 61 and the variable diameter section 62 an integral structure, and no additional connection or fixation is required between the variable diameter section 62 and the main body section 61. It is understood that the above winding sequence is one of the optional sequences. As for other optional sequences, in some embodiments, a single wire can be wound in a spiral structure to the required length of the main body section 61, and then wound in a spiral structure to the required length of the variable diameter section 62. Furthermore, the winding density and winding length of the variable diameter section 62 and the main body section 61 can be referred to the first embodiment of the conveying device, and therefore will not be repeated here.

[0068] Except for the differences mentioned above, the other structural designs of the delivery device in this embodiment are the same as those in the first embodiment of the delivery device. It can be seen that the relative position design of the variable diameter section 62 and the main body section 61 allows the delivery cable 6 to adapt to different vascular and organ environments, meet different surgical requirements, and ensures that the delivery cable 6, guided and limited by blood vessels, organs, and / or sheaths, can meet angle adjustment requirements through its own adaptive deformation capability, allowing the implant to be precisely inserted into the pre-occlusion position.

[0069] Third embodiment of the conveying device

[0070] Reference Figure 9 and Figure 10 The difference between this embodiment and the other embodiments of the conveying device lies in the connection structure between the inner insert and the connecting bolt head. Specifically, in this embodiment:

[0071] The design of the insertion hole on the connecting bolt head 71 is cancelled, and a first threaded hole 711 is used instead. That is, the first threaded hole 711 is recessed into the connecting bolt head 71 from the second end of the connecting bolt head 71 in the axial direction. Correspondingly, a first external thread section 721 is provided at the first end of the inner insert 72. When the inner insert 72 is connected to the connecting bolt head 71, the first external thread section 721 is inserted into the first threaded hole 711 and threadedly connected to the first threaded hole 711.

[0072] In some embodiments, the thread of the screw 712 of the connecting plug head 71 is opposite to the helical direction of the first external thread segment 721, so as to ensure that the connecting plug head 71 and the implant remain reliably connected when the inner insert 72 and the connecting plug head 71 are unscrewed, and to prevent the connecting plug head 71 from loosening or separating from the implant.

[0073] Furthermore, the pitch of the first threaded hole 711, the pitch of the first external thread segment 721, the pitch of the second threaded hole, and the pitch of the second external thread segment are equal to ensure that when the operating handle is unscrewed relative to the handle sleeve, the first external thread segment 721 can be unscrewed relative to the first threaded hole 711.

[0074] Apart from the differences mentioned above, the other structural designs of the conveying device in this embodiment are the same as those in other embodiments of the conveying device.

[0075] Fourth embodiment of the conveying device

[0076] The difference between this embodiment and the three embodiments of the conveying device lies in the connection structure between the inner insert and the connecting bolt head. Specifically, in this embodiment:

[0077] The design of the first threaded hole on the connector head and the first threaded section on the inner insert are cancelled; and the following design changes are made to the connector head and the inner insert:

[0078] A first magnet is provided at the second end of the connector head and a second magnet is provided at the first end of the inner insert, so that when the connector head is connected to the inner insert, the first magnet and the second magnet generate an attractive magnetic force, and the first magnet and the second magnet are attracted and fixed together, thereby achieving a fixed connection between the connector head and the inner insert.

[0079] Except for the differences mentioned above, the other structural designs of the conveying device in this embodiment are the same as those in the third embodiment of the conveying device.

[0080] Conveying System Implementation Examples

[0081] The delivery system includes a sheath and a delivery device, wherein the delivery device is the delivery device described in any of the first to fourth embodiments of the above-mentioned delivery device. When the delivery system implants an implant, the implant is connected to a connecting plug, and then the implant is placed inside the sheath. A portion of the delivery device (including a part of the delivery cable, a part of the inner core, and the connecting plug, etc.) passes through the sheath. The implant is then pushed to a preset occlusion position by the delivery device, adjusted, and then released. The delivery system using the above-mentioned delivery device can more accurately and safely implant the implant into the pre-occlusion position.

[0082] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A conveying device, comprising a conveying steel cable, characterized in that: The conveying steel cable has a main body section and a variable diameter section. The variable diameter section is located at the first end of the conveying steel cable, and the first diameter of the variable diameter section is smaller than the second diameter of the main body section. The transmission cable also includes a connecting bolt and an inner insert. The first end of the connecting bolt has an implant connection portion, and the second end of the connecting bolt is connected to the first end of the transmission cable. The inner insert can be inserted into the transmission cable, and the first end of the inner insert is detachably connected to the connecting bolt.

2. The conveying device according to claim 1, characterized in that: The first length of the variable diameter section is between 10 cm and 16 cm.

3. The conveying device according to claim 2, characterized in that: The first end of the variable diameter section is connected to the second end of the connecting bolt, and the second end of the variable diameter section is connected to the first end of the main body section; or The main body section has a first segment and a second segment. The first end of the first segment is connected to the second end of the connecting bolt head. The variable diameter segment is connected between the second end of the first segment and the first end of the second segment. The second length of the first segment is between 10 cm and 15 cm.

4. The conveying device according to claim 3, characterized in that: The first end of the variable diameter section can be bent relative to the second end of the variable diameter section, with the bending angle between 60° and 180°.

5. The conveying device according to claim 3, characterized in that: The main body section and the variable diameter section are integrally spirally wound; The first winding pitch of the main body section is less than or equal to the second winding pitch of the variable diameter section.

6. The conveying device according to claim 1, characterized in that: The connector head has a recessed hole, which is recessed into the connector head axially from the second end of the connector head, and the first end of the inner insert can be inserted into the recessed hole; or The connecting bolt head has a first threaded hole, which is recessed into the connecting bolt head from the second end in the axial direction. The first end of the inner insert has a first external threaded section, which can be inserted into the first threaded hole. or The second end of the connector head is provided with a first magnet, and the first end of the inner core is provided with a second magnet. The first magnet and the second magnet generate an attractive magnetic force.

7. The conveying device according to claim 6, characterized in that: When the connector head has the socket, the bottom of the socket is a first hemisphere, the first end face of the inner core is a second hemisphere, the second hemisphere has a similar outline to the first hemisphere, and the second hemisphere can fit against the first hemisphere.

8. The conveying device according to claim 6, characterized in that: The implant connection part is a screw; When the connecting bolt head has the first threaded hole, the thread of the screw is opposite to the helical direction of the first external thread segment.

9. The conveying device according to any one of claims 1 to 8, characterized in that: The conveying device further includes: A handle sleeve, the first end of which is connected to the second end of the conveying steel cable, and the handle sleeve having a second threaded hole; The operating handle has an operating part and an overlapping part. The overlapping part is connected between the operating part and the second end of the inner core. The overlapping part has a second external thread section that can be inserted into the second threaded hole. The operating handle can control the connection or separation of the inner core from the connecting bolt head. The operating handle can also control the movement of the inner core relative to the conveying steel cable.

10. A conveying system, comprising a sheath, characterized in that, It also includes a conveying device as described in any one of claims 1 to 9, wherein the conveying cable may be threaded through the sheath.

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