Wire locking system and wire locking device

Abstract

The present invention provides a wire locking system comprising a conveyor assembly and a locking member. The locking member is mounted on the conveyor assembly and is inserted into the lumen of a wire. The conveyor assembly is configured to adjust the radial dimension of the locking member so that the locking member radially abuts against the inner wall of the wire and can drive the wire for synchronous movement. The present invention also provides a wire locking device comprising the aforementioned wire locking system.

Description

Technical Field

[0001] The present invention relates to the technical field of interventional medical devices, and in particular to a wire locking device for locking an electrode wire implanted in a patient's body for a long period of time, and a wire locking system in the wire locking device. Background Art

[0002] Many medical procedures and surgical procedures require the implantation of elongated structures within the body of a human or livestock patient. These elongated structures may include catheters, sheaths, cardiac electrical leads (e.g., pacemaker leads or defibrillator leads), and a variety of other devices. A pacemaker is typically implanted in a pocket of subcutaneous tissue within the patient's chest wall. Multiple leads extend from the pacemaker through a vein into the patient's heart chambers. Defibrillator leads may be fixed inside or outside the heart.

[0003] Due to factors such as infection, lifespan, and failure, implanted elongated structures may need to be removed from a patient's body. However, after implantation, fibrous tissue adhering to the heart, vein walls, or other surrounding tissues may grow on the surface of the elongated structure over time, even surrounding it. This is particularly true in areas with slow blood flow. The fibrous tissue is very tough, making it difficult to remove the elongated structure without damaging the area.

[0004] Current techniques for removing elongated structures often involve the use of a wire locking device to assist in this process. These devices typically include a handle and a wire locking system. The expandable coil in the wire locking system can be selectively positioned between two states, such as a first state and a second state. In the second state, the expandable coil has a larger radial dimension than in the first state. In the first state, the surgeon inserts the wire locking system into the lumen of the implanted elongated structure. When the distal end of the wire locking system reaches a desired location (e.g., the distal end of the wire), the surgeon controls the expandable coil to switch to the second state, causing the expandable coil to expand radially and secure to the inner wall of the elongated structure, facilitating the surgeon's ability to pull the handle of the wire locking device and move it proximally to extract the wire.

[0005] However, the locations where the slender structures are implanted in the vascular system vary from patient to patient. During actual surgery, since the expandable coil can only expand radially in two states, namely the first state and the second state mentioned above, the radial size options of existing expandable coils are limited, resulting in the locking effect of the expandable coil not meeting expectations in some surgeries, causing surgical failure. Summary of the Invention

[0006] The present invention provides a wire locking system, which includes a conveying assembly and a locking member. The locking member is arranged on the conveying assembly and is used to be inserted into the inner cavity of a wire. The conveying assembly is used to adjust the radial size of the locking member so that the locking member is radially close to the inner wall of the wire and can drive the wire to move synchronously.

[0007] The present invention also provides a wire locking device for removing a slender tubular structure implanted in the body. The wire locking device includes a handle and a wire locking system. The proximal end of the delivery component of the wire locking system is connected to the handle. The wire locking system includes a delivery component and a locking member. The locking member is arranged on the delivery component and is used to be inserted into the inner cavity of a wire. The delivery component is used to adjust the radial size of the locking member so that the locking member is radially close to the inner wall of the wire and can drive the wire to move synchronously.

[0008] After the wire locking system of the wire locking device of the present invention is inserted into the lumen of an elongated tubular structure, the radial dimension of the locking element is gradually increased by operating the delivery assembly until the locking element securely abuts against the inner wall of the elongated tubular structure, thereby firmly connecting the wire locking system to the elongated tubular structure. The elongated tubular structure can then be removed from the body by proximally moving the handle. Because the radial dimension of the locking element is adjustable, the locking element not only locks elongated tubular structures of varying inner diameters, making the wire locking system adaptable to elongated tubular structures of varying inner diameters, but also facilitates stable locking of the wire locking system with the elongated tubular structure in various application environments, thereby enhancing the locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the implementation. Obviously, the drawings described below are some implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 1 is a schematic structural diagram of a wire locking device provided by a first embodiment of the present invention;

[0011] Figure 2 yes Figure 1 A schematic structural diagram of a wire locking system of a wire locking device;

[0012] Figure 3 yes Figure 2 A schematic structural diagram of the wire locking system from another perspective;

[0013] Figure 4 yes Figure 2A schematic structural diagram of a locking member of a wire locking system;

[0014] Figure 5 yes Figure 1 A schematic structural diagram of a handle of a wire locking device;

[0015] Figure 6 yes Figure 3 A schematic diagram of the three-dimensional structure of a locking member of the wire locking system in one of the folded states;

[0016] Figure 7 yes Figure 6 A schematic structural diagram of the wire locking system from another perspective;

[0017] Figure 8 2 is a schematic structural diagram of a locking member of a wire locking system of a wire locking device provided in a second embodiment of the present invention;

[0018] Figure 9 yes Figure 8 Enlarged view of section IX;

[0019] Figure 10 1 is a partial structural diagram of one state of a conveying component of a wire locking system of a wire locking device provided by a third embodiment of the present invention;

[0020] Figure 11 yes Figure 10 A schematic diagram of a partial structure of another state of the conveying component in FIG.

[0021] Figure 12 is a schematic structural diagram of one state of a wire locking system of a wire locking device provided by a fourth embodiment of the present invention;

[0022] Figure 13 yes Figure 12 A schematic structural diagram of another state of the wire locking system;

[0023] Figure 14 1 is a schematic structural diagram of one state of a wire locking system of a wire locking device provided by a fifth embodiment of the present invention;

[0024] Figure 15 yes Figure 14 A schematic structural diagram of another state of the wire locking system;

[0025] Figure 16 1 is a schematic structural diagram of one state of a wire locking system of a wire locking device provided by a sixth embodiment of the present invention;

[0026] Figure 17 yes Figure 16 A schematic structural diagram of another state of the wire locking system in FIG.

[0027] Figure 18 2 is a schematic structural diagram of a wire locking device provided in a seventh embodiment of the present invention.

[0028] Figure 19 yes Figure 18 A schematic structural diagram of one state of a locking member of a wire locking device in FIG.

[0029] Figure 20 yes Figure 19 A structural schematic diagram of another state of the locking member in FIG.

[0030] Figure 21 yes Figure 18 Schematic diagram of the structure of the handle of the wire locking device.

[0031] Figure 22 FIG. 1 is a structural diagram of one state of a locking member of a wire locking device provided in an eighth embodiment of the present invention.

[0032] Figure 23 yes Figure 22 A structural schematic diagram of another state of the locking member in FIG. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0034] In addition, the following descriptions of the embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention may be implemented. Directional terms mentioned in the present invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," and "side," are only used to refer to the directions in the accompanying drawings. Therefore, the use of directional terms is for better and clearer description and understanding of the present invention, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting the present invention.

[0035] In order to more clearly describe the structure of the wire locking system and the wire locking device, the limiting terms "proximal", "distal" and "axial" described in the present invention are commonly used terms in the field of interventional medicine. Specifically, "distal" refers to the end away from the operator during the surgical operation; "proximal" refers to the end close to the operator during the surgical operation; the proximal end in the present invention is closer to the operator (surgeon) than the distal end. After the device is assembled, each component includes a proximal end and a distal end, and the proximal end of each component is closer to the operator than the distal end. "Axial" refers to the direction of the central axis of the device, and the radial direction is the direction perpendicular to the central axis. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The common terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not to be understood as limiting the present invention.

[0036] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, the element may be directly connected to the other element or indirectly connected to the other element through one or more connecting elements. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or connected to the other element through one or more connecting elements.

[0037] See also Figure 1 , Figure 1 FIG2 is a schematic diagram of the structure of a lead locking device 100 provided in a first embodiment of the present invention. The present invention provides a lead locking device 100 for removing an elongated tubular structure implanted in a patient. Such elongated tubular structures include, but are not limited to, implanted catheters, sheaths, cardiac electrical leads, and various other devices; such cardiac electrical leads include pacemaker leads or defibrillator leads. For convenience, the present invention uses a pacemaker lead 500 as an example. The distal end of the pacemaker lead 500 is also connected to an electrode fixed to the heart. The lead locking device 100 is used to remove at least the pacemaker lead 500 during pacemaker electrode removal surgery or other surgical procedures.

[0038] The wire locking device 100 includes a wire locking system 20 and a handle 50 disposed at the proximal end of the wire locking system 20. The distal end of the wire locking system 20 is used to be inserted into the inner lumen 502 of a wire 500 and lock the inner wall of the wire 500. The wire locking system 20 includes a locking member 22 and a conveying assembly 26 connected to the locking member 22. By operating the conveying assembly 26, the radial dimension of the locking member 22 is adjusted so that the locking member 22 radially contacts the inner wall of the wire 500 and drives the wire 500 for synchronous movement. Specifically, locking member 22 is connected to the distal end of delivery assembly 26, and handle 50 is connected to the proximal end of delivery assembly 26. Locking member 22 and the distal end of delivery assembly 26 are used to be inserted into the lumen of guidewire 500. When locking member 22 is adjacent to the distal end of guidewire 500, the radial dimension of locking member 22 is gradually increased by controlling delivery assembly 26 until locking member 22 radially abuts against the inner wall of guidewire 500. This allows proximal movement of handle 500 to drive locking member 22 and guidewire 500 out of the body. Locking member 22 radially abutting against the inner wall of guidewire 500 means that locking member 22 has an interference fit or abuts against the inner wall of guidewire 500 in the radial direction, thereby locking member 22 securely to guidewire 500.

[0039] After the wire locking system 20 of the wire locking device 100 of the present invention is inserted into the inner lumen 502 of the wire 500 and moved to the appropriate position, the radial dimension of the locking element 22 is gradually increased by controlling the conveyor assembly 26 until the locking element 22 firmly abuts the inner wall of the wire 500, thereby firmly connecting the wire locking system 20 to the wire 500. The handle 50 is then moved proximally to remove the wire 500 from the body. Because the radial dimension of the locking element 22 is adjustable, the locking element 22 can lock wires 500 of varying inner diameters, making the wire locking system 20 suitable for slender tubular structures with varying inner diameters. This facilitates stable locking of the wire locking system 20 with the slender tubular structure in various application environments, improving the locking effect and preventing surgical failure.

[0040] Please also refer to Figures 2 to 4 , Figure 2 yes Figure 1 A schematic structural diagram of a wire locking system 20 of a wire locking device; Figure 3 yes Figure 2 A schematic structural diagram of the wire locking system 20 from another perspective; Figure 4 yes Figure 2Schematic diagram of the locking element 22 of the wire locking system 20 in FIG. The delivery assembly 26 includes an inner core 261 and a sleeve 265, which are nested together. The locking element 22 is disposed between the inner core 261 and the sleeve 265. The inner core 261 and the sleeve 265 are capable of relative movement, causing the forces exerted on the locking element 22 by the inner core 261 and the sleeve 265 to change, thereby adjusting the radial dimension of the locking element 22. Specifically, the sleeve 265 is cylindrical and nests around the outer periphery of the inner core 261. The sleeve 265 and the inner core 261 are axially slidable relative to each other. The proximal end of the inner core 261 is connected to the handle 50. The locking element 22 is disposed at the distal end of the inner core 261 and is located distal to the sleeve 265. The sleeve 265 slides distally relative to the inner core 261, causing the locking element 22 to be squeezed and deformed by the sleeve 265 and the inner core 261, thereby gradually increasing the radial dimension of the locking element 22. In the initial state, the distal end of the sleeve 265 and the proximal end of the locking member 22 may be connected or not connected. Preferably, the proximal end of the locking member 22 and the distal end of the sleeve 265 are not connected.

[0041] In this embodiment, the locking element 22 is at least one spring element disposed within the inner core 261. The inner core 261 and the sleeve 265 move axially relative to each other, compressing the spring element to deform it and change its radial dimension. The spring element is a strip-shaped structure, inserted through multiple through-holes in the inner core 261. Specifically, the distal end of the spring element is fixedly connected to the distal end of the inner core 261. The relative axial movement of the sleeve 265 and the inner core 261 causes the force exerted by the sleeve 265 on the other end of the spring element to change. Specifically, as the sleeve 265 slides relative to the inner core 261 toward the spring element, the distal end of the sleeve 265 gradually approaches the proximal end of the spring element. As the sleeve 265 continues to move distally and compress the proximal end of the spring element, the spring element is squeezed and contracted distally, causing it to fold and deform. Specifically, the axial dimension of the spring element gradually decreases, while its radial dimension gradually increases. The force exerted by the end of the sleeve 265 on the spring element gradually increases, and the elastic deformation of the spring element also gradually increases. Specifically, after the sleeve 265 contacts the locking member 22, the greater the force with which the sleeve 265 squeezes the proximal end of the locking member 22, the greater the radial expansion of the locking member 22, that is, the larger the radial size of the locking member 22, the shorter it is compressed in the axial direction, thereby enabling the locking member 22 to lock a variety of wires with different inner diameters, thereby improving the applicability of the wire locking device.

[0042] In other embodiments, the proximal end of the spring is fixedly connected to the distal end of the sleeve 265, and the distal end of the inner core 261 is connected to the distal end of the spring. The inner core 261 moves toward the proximal end relative to the sleeve 265 to squeeze the spring to shrink toward the proximal end and fold and deform, so that the axial size of the spring gradually decreases and the radial size of the spring gradually increases.

[0043] In other embodiments, the distal end of the spring is fixedly connected to a position other than the distal end of the inner core 261; and / or the proximal end of the spring is connected to the distal end of the sleeve 265; and / or the sleeve 265 is arranged at the distal periphery of the inner core relative to the locking member 22, and the proximal end of the locking member 22 is connected to the inner core 261.

[0044] like Figures 2 to 4 As shown, the locking member 22 has a plurality of through holes 220 spaced apart along its length, and the inner core 261 is sequentially inserted into these through holes 220. The distal end of the sleeve 265 and the distal end of the inner core 261 are brought close to each other to squeeze the locking member 22 and cause it to elastically deform, so that the portion between two adjacent through holes 220 of the locking member 22 bends in a direction away from the axis of the inner core 261, thereby gradually increasing the radial dimension of the locking member 22. The width of the spring is less than or equal to the outer diameter of the sleeve 265, so that the largest diameter component in the locking system 200 is the sleeve 265, which facilitates the insertion of the inner core 261 and the spring into the wire 500 ( Figure 1 The width of the shrapnel is greater than the inner diameter of the sleeve 265, so that when the sleeve 265 squeezes one end of the shrapnel, the shrapnel is prevented from being inserted into the sleeve 265, thereby facilitating operation.

[0045] Preferably, the width of the spring is equal to the outer diameter of the sleeve 265. When the inner core 261 is sequentially inserted into the through-holes 220, and before the locking member 22 is squeezed, the locking member 22 is in an extended state. At this point, the radial dimension of the locking member 22 is less than or equal to the outer diameter of the sleeve 265 and greater than the inner diameter of the sleeve 265. When the sleeve 265 slides distally relative to the inner core 261, it can abut against the end of the locking member 22. Furthermore, each through-hole 220 is a bar-shaped hole, extending axially. In this embodiment, each through-hole 220 is a waist-shaped hole. After the distal end of the inner core 261 is sequentially inserted through the plurality of through-holes 220, the distal end of the locking element 22 is fixedly attached to the distal end of the inner core 261 by welding or adhesive bonding. When the locking element 22 is extended, the proximal end of the locking element 22 is either in contact with or barely in contact with the distal end of the sleeve 265, and the locking element 22 is not subjected to pressure from the sleeve 265. In this state, the wire locking system 20 can be inserted into the lumen of any wire with an inner diameter larger than the outer diameter of the sleeve 265. Because the locking element 22 fixedly attached to the inner core 261 has different degrees of curvature at different distances from the distal end of the inner core 261, the dimensions of the through-holes 220 at different locations of the locking element 22 vary. Specifically, the closer the spring portion of the locking element 22 is to the distal end of the inner core 261, the greater the curvature, and the shorter the length of the through-hole 220 can be set. The dimensions of the multiple through-holes 220 on the locking element 22 can be set to be the same.

[0046] like Figure 2 and Figure 3As shown, sleeve 265 is a stainless steel tube with an inner diameter of 0.2-0.4 mm and an outer diameter of 0.4-0.6 mm. The wire locking system 20 in this embodiment can lock wires 500 with inner diameters greater than 0.4-0.6 mm. In practical applications, the inner and outer diameters of sleeve 265 can be adjusted as needed to lock wires 500 of varying sizes. The inner core 261 is linear and supports sleeve 265 and locking member 22. Preferably, inner core 261 is a 0.1-0.3 mm stainless steel wire.

[0047] See also Figure 5 , Figure 5 yes Figure 1 Schematic diagram of the structure of the handle 50 of the wire locking device 100 in FIG. The handle 50 includes a first connector 53 and a second connector 54 movably connected to the first connector 53. The first connector 53 is used to connect to the inner core 261, and the second connector 54 is used to connect to the sleeve 265. The first connector 53 and the second connector 54 are mutually engaged. Specifically, the first connector 53 includes a main body 52 and a connector 56. The main body 52 is cylindrical and has a threading cavity 520 extending axially therethrough. The second connector 54 is engaged with the distal opening of the threading cavity 520. The proximal end of the inner core 261 extends from the distal end of the threading cavity 520 to the proximal end of the threading cavity 520. The connector 56 is inserted into the proximal opening of the threading cavity 520 and fixes the proximal end of the inner core 261 between the connector 56 and the main body 52. The main body 52 is used for the operator to grasp and control the relative movement between the inner core 261 and the sleeve 265. The second connector 54 and the connector 56 are both detachably connected to the main body 52. ​​Further, the second connector 54 and the connector 56 are both detachably engaged with the main body 52.

[0048] Specifically, the second connector 54 includes a fixing portion 541, a cylindrical neck portion 543, and a hook portion 545, which are arranged in sequence. The diameters of the three are arranged from large to small as follows: fixing portion 541, hook portion 545, and neck portion 543. The diameter of the fixing portion 541 is close to or equal to the diameter of the main body 52. ​​The threading cavity 520 of the main body 52 includes a card slot cavity 521, a connecting hole 525, and an insertion cavity 523 from the distal end to the proximal end. The neck portion 543 and the hook portion 545 are used to be accommodated in the card slot cavity 521. The hook portion 545 and the card slot cavity 521 are engaged with each other, so that the second connector 54 is detachably connected to the distal end of the main body 52.

[0049] The second connector 54 has an inner cavity 542 extending axially through its two opposing ends. The inner cavity 542 comprises a first cavity 5421 at the distal end of the second connector 54 and a second cavity 5423 at the proximal end of the second connector 54. The first cavity 5421 and the second cavity 5423 are interconnected. The first cavity 5421 accommodates and secures the proximal end of the sleeve 265, while the second cavity 5423 allows for the insertion of the inner core 261.

[0050] The connector 56 engages with the insertion cavity 523 at the proximal end of the main body 52. ​​The communication hole 525 is located between the slot cavity 521 of the main body 52 and the insertion cavity 523, connecting the slot cavity 521 and the insertion cavity 523. The proximal end of the inner core 261 passes through the first cavity 5421, the second cavity 5423, and the communication hole 525 in sequence and enters the insertion cavity 523. After the connector 56 is inserted and secured in the insertion cavity 523, the proximal end of the inner core 261 in the insertion cavity 523 is clamped between the connector 56 and the inner wall of the main body 52 adjacent to the insertion cavity 523, thereby securing the inner core 261 to the interior of the handle 50.

[0051] It is understood that the outer surface of the plug connector 56 and the inner wall of the main body 52 adjacent to the insertion cavity 523 can be provided with grooves and protrusions that can engage with each other, and the engagement of the grooves and protrusions allows the plug connector 56 to be detachably plugged into the main body 52. ​​When the plug connector 56 is removed from the main body 52, the inner core 261 can be removed.

[0052] The second connector 54 is used to maintain the relative position between the sleeve 265 and the inner core 261. When the sleeve 265 is not required to slide relative to the inner core 261, the second connector 54 is used to fix the sleeve 265 to the handle 50, which can effectively reduce the probability of malfunction. When the sleeve 265 needs to be pushed forward, the operator pushes the second connector 54 distally from the housing 50, causing the hook 545 to withdraw from the slot 521, that is, the second connector 54 is removed from the main body 52. ​​The second connector 54 moves distally to drive the sleeve 265 to move distally relative to the inner core 261, so that the distal end of the sleeve 265 presses against the locking member 22. The second connector 54, the main body 52, and the connector 56 can all be elastic members; or only the main body 52 can be an elastic member, and the second connector 54 and the connector 56 can be hard members; or the main body 52 can be a hard member, and the second connector 54 and the connector 56 can be elastic members.

[0053] Please also refer to Figures 1 to 7 , Figure 6 yes Figure 3 A schematic diagram of the three-dimensional structure of the wire locking system 20 in one of the folded states; Figure 7 yes Figure 6Schematic diagram of the structure of the lead locking system 20 from another perspective. During surgery, the lead locking system 20 is inserted into the lumen 502 of the lead 500 in the body. The handle 50 is pushed distally along the lumen of the lead 500 until the locking element 22 reaches a predetermined position. This predetermined position is generally the distal end of the lead 500, close to the heart and the electrodes at the end of the lead 500. The operator uses the first connector 52 to hold the inner core 261 stationary. The second connector 54 is moved distally, driving the sleeve 265 distally relative to the inner core 261. The distal end of the sleeve 265 presses against the proximal end of the locking element 22, causing the proximal end of the locking element 22 to move toward its distal end, reducing the axial dimension of the locking element 22. Since the distal end of the locking member 22 is fixed to the distal end of the inner core 261, the multiple through holes 220 on the locking member 22 penetrate the inner core 261, so that the spring portion between at least two adjacent through holes 220 undergoes elastic deformation and protrudes in a direction away from the axis of the inner core 261, presenting a Figure 6-Figure 7 In the folded shape shown, the radial dimension of the locking element 22 increases, enabling it to firmly grip the inner wall of the wire 500, thereby locking the distal end of the wire 500. The greater the driving force applied to the second connector 54 toward the distal end, the greater the force exerted by the sleeve 265 on the proximal end of the locking element 22, and the greater the radial expansion of the locking element 22. This results in a larger radial dimension of the locking element 22 and a shorter axial compression. When the radial dimension of the locking element 22 is too large, the driving force applied to the second connector 54 can be reduced, allowing the locking element 22 to recover some of its deformation, thereby reducing its radial dimension.

[0054] The wire locking probe 20 provided in this embodiment can gradually increase the radial size of the locking member 22 according to the needs of actual application to achieve a better locking effect. For example, after the locking member 22 reaches the predetermined position, the operator pushes the sleeve 265 toward the distal end, and the radial size of the locking member 22 will gradually increase; if the operator pulls the inner core 261 toward the proximal end, the inner core 261 cannot drive the sleeve 265 to move synchronously, and it is concluded that the locking member 22 is not effective in locking the wire 500. That is, when inner core 261 is pulled, inner core 261 and sleeve 265 will slide relative to each other. The operator can then continue to push sleeve 265 distally, increasing the force of sleeve 265 squeezing the proximal end of locking member 22. This causes sleeve 265 to further squeeze locking member 22, causing locking member 22 to expand radially to a greater extent, and the radial dimension of locking member 22 to continue to increase until inner core 261 completely locks sleeve 265 (i.e., when inner core 261 is pulled proximally, inner core 261 and sleeve 265 do not slide relative to each other). The wire locking device 100 provided by the present invention can adjust the radial dimension of the wire locking probe 20 according to actual needs to accommodate slender tubular structures with different inner diameters, and can ensure that the locking member 22 is securely locked to the slender tubular structure.

[0055] Please also refer to Figure 8 and Figure 9 , Figure 8 2 is a schematic structural diagram of a locking member 22a of a wire locking system of a wire locking device provided in a second embodiment of the present invention; Figure 9 yes Figure 8 An enlarged view of section IX in FIG. The structure of the wire locking device provided in the second embodiment of the present invention is similar to that of the first embodiment, except that, in the second embodiment, a barb 222 is provided between each pair of adjacent through-holes 220 of the locking member 22a. Specifically, at least one barb 222 is laser-cut between each pair of adjacent through-holes 220 of the locking member 22a. Preferably, each barb 222 is located in the middle or near the middle between the corresponding two through-holes 220 of the locking member 22a, so that the barb 222 tilts upward when the spring sheet deforms. The tip of each barb 222 faces proximally, that is, toward the sleeve 265. When the spring sheet is squeezed and deformed by the inner core 261 and the sleeve 265, the tip of the barb 222 tilts proximally, allowing the operator to pull the wire 500 through the inner core 261.

[0056] In other embodiments, by performing surface treatment on the locking element 22a to increase its surface roughness, the wire locking probe can be made to lock onto the inner wall of the elongated tubular structure more easily.

[0057] The method of using the wire locking device in the second embodiment is the same as that in the first embodiment, and will not be described again here.

[0058] Please also refer to Figure 10 and Figure 11 The structure of the wire locking device provided in the third embodiment of the present invention is similar to that of the first embodiment, except that, in the third embodiment, the delivery assembly 26 further includes a positioning member 266 disposed at or near the proximal end of the sleeve 265. The positioning member 266 is connected between the inner core 261 and the sleeve 265. The positioning member 266 is used to secure the inner core 261 and the sleeve 265. Specifically, the inner core 261 and the sleeve 265 are secured to each other by the positioning member 266, and the positioning member 266 prevents relative axial movement between the inner core 261 and the sleeve 265. Preferably, the positioning member 266 is disposed at the distal end of the handle 50.

[0059] The positioning member 266 includes a first positioning member 267 fixedly connected to the inner core 261 and a second positioning member 268 fixedly connected to the sleeve 265. The first positioning member 267 and the second positioning member 268 cooperate with each other to obtain multiple positioning positions, so as to keep the locking member in a state of different radial dimensions, which can adapt to the needs of the slender tube structure; after the first positioning member 267 and the second positioning member 268 are engaged and positioned, the operator does not need to always grasp the sleeve 265 and the inner core 261 to maintain the relative position relationship between the two, which facilitates the operator to subsequently pull the wire 500 or other operations.

[0060] In this embodiment, the second positioning member 268 is tubular, and the first positioning member 267 can be inserted into the inner cavity of the second positioning member 268. The first positioning member 267 and the second positioning member 268 are positioned by an elastic block and a hole. Preferably, the first positioning member 267 and the second positioning member 268 are both tubular, the first positioning member 267 is fixedly mounted on the periphery of the inner core 261, and the distal end of the second positioning member 268 is fixedly mounted on the proximal periphery of the sleeve 265. The inner diameter of the second positioning member 268 is larger than the outer diameter of the first positioning member 267, and one of the two is an elastic member; the hole and the block are respectively provided on the outer circumference of the first positioning member 267 and the inner circumference of the second positioning member 268. When the sleeve 265 slides relative to the inner core 261, the relative position between the second positioning member 268 and the first positioning member 267 also changes, and the second positioning member 268 is positioned by the block snapping into the corresponding hole.

[0061] like Figure 10 As shown, the outer circumference of the first positioning member 267 defines a plurality of axially spaced locking holes 2670. These holes 2670 are spaced apart axially, meaning that each hole 2670 is positioned at a different distance from the distal end of the first positioning member 267. A locking block 2680 is provided on the inner circumference of the second positioning member 268. The locking block 2680 can be selectively engaged with any of the locking holes 2670, allowing the first positioning member 267 and the second positioning member 268 to cooperate and position themselves at different locations. When the locking blocks 2680 are engaged with different locking holes 2670, the radial dimensions of the locking member differ.

[0062] Preferably, chamfers are provided on the side walls at the openings of the respective locking holes 2670 to facilitate the sliding of the locking block 2680 ; and / or chamfers are provided around the ends of the locking block 2680 to facilitate the sliding of the locking block 2680 .

[0063] In other embodiments, the inner wall (inner circumference) of the second positioning member 268 is provided with a plurality of spaced-apart holes along the axial direction, and the outer circumference of the first positioning member 267 is provided with an elastic block, which can be selectively inserted into any of the holes, so that the first positioning member 267 and the second positioning member 268 cooperate with each other to be positioned at different positioning positions, so that the radial dimensions of the locking member 22 are different.

[0064] Please also refer to Figure 12 and Figure 13The structure of the wire locking device provided in the fourth embodiment of the present invention is similar to that of the first embodiment, except that in the fourth embodiment, the locking element 22b is formed by at least one spring element, which is annular or partially annular in shape. Two opposing through-holes are defined in the peripheral wall of the spring element, and the distal end of the inner core 261 is inserted through the two through-holes of the spring element. When the sleeve 265 and the inner core 261 move relative to each other in the axial direction, the force exerted by the sleeve 265 on the other end of the spring element changes, compressing the spring element and causing it to elastically deform, thereby changing the radial and axial dimensions of the locking element 22b.

[0065] Sleeve 265 slides distally relative to inner core 261. The distal end of sleeve 265 presses against the spring element in locking member 22b, causing it to deform. Specifically, the spring element's axial dimension decreases with respect to inner core 261, while its radial dimension gradually increases, thereby securely locking locking member 22b to the inner wall of wire 500. The spring element can be in the shape of a circular ring, an elliptical ring, a square ring, or other irregular closed annular structures. Two opposing through-holes are defined in the circumferential wall of the spring element, and the specific locations of the through-holes on the circumferential wall of the spring element are not limited.

[0066] In this embodiment, there are multiple spring pieces, which are sleeved onto the distal end of the inner core 261 through through-holes, with the most distal spring piece fixedly connected to the inner core 261. When the sleeve 265 slides distally relative to the inner core 261, the distal end of the sleeve 265 presses against the spring pieces, deforming them. This causes the axial dimension of each spring piece to decrease, while the radial dimension of each spring piece gradually increases, thereby facilitating the secure locking of the locking member 22b to the inner wall of the wire 500. The peripheral wall of the most distal spring piece may be provided with only one through-hole. After the distal end of the inner core 261 passes through the single through-hole of the most distal spring piece, it is then welded or adhesively secured to the most distal spring piece.

[0067] In this embodiment, each spring fragment is annular in shape, with two through-holes disposed opposite each other. When the spring fragments are uncompressed, the axial dimension of the inner core 261 occupied by each spring fragment is relatively large, and the radial dimension is relatively small. When the spring fragments are compressed, the axial dimension of each spring fragment along the inner core decreases, while the radial dimension increases, thereby deforming the spring fragment into an elliptical ring or similar shape. The closer the distal end of the sleeve 265 is to the distal end of the inner core 261, the larger the radial dimension of the locking member 22b.

[0068] Please also refer to Figure 14 and Figure 15The structure of the wire locking device provided in the fifth embodiment of the present invention is similar to that of the first embodiment, except that: in the fifth embodiment, the locking member 22c is an elastic locking piece 223 provided on the inner core 261, the distal end of the locking piece 223 is connected to the inner core 261, and the sleeve 265 is adjacent to the proximal end of the inner core 261 relative to the locking member 22c. The distal end of the sleeve 265 is provided with a guide portion 2650, and a gap is formed between the proximal end of the locking piece 223 and the outer surface of the inner core 261. The sleeve 265 slides relative to the inner core 261, causing the position of the guide portion 2650 inserted into the gap to change, thereby adjusting the radial dimension of the locking member 22c.

[0069] Specifically, the locking piece 22c includes an elastic locking piece 223 provided at the distal end of the inner core 261, and a fixed tube 225 connected to the distal end of the locking piece 223. The distal end of the locking piece 223 is connected to the distal end of the inner core 261 through the fixed tube 225. The inner core 261 and the sleeve 265 move relative to each other in the axial direction so that the guide portion 2650 at the distal end of the sleeve 265 is slidably inserted into the gap and pushes the inner surface of the proximal end of the locking piece 223 to push the locking piece 223 to elastically deform so that the proximal end of the locking piece 223 moves toward the axis away from the inner core 261 and changes the radial dimension.

[0070] When the sleeve 265 slides toward the distal end relative to the inner core 261, the guide portion 2650 slides into the gap and pushes against the inner surface of the proximal end of the locking piece 223, causing the proximal end of the locking piece 223 to move away from the axis of the inner core 261, that is, toward the guide wire 500 ( Figure 1 ) moves toward the inner wall of the inner core 261; when the sleeve 265 slides toward the proximal end relative to the inner core 261, the guide portion 2650 slides out of contact with the inner surface of the proximal end of the locking piece 223, causing the proximal end of the locking piece 223 to move toward the axis of the inner core 261, that is, toward the direction away from the wire 500 ( Figure 1 ) moves toward the inner wall of the casing, thereby returning to its initial state.

[0071] The diameter of the guide portion 2650 gradually decreases from the proximal end to the distal end, i.e., the distal end diameter of the guide portion 2650 is smaller than the diameter of the sleeve 265. This facilitates the distal end of the guide portion 2650 to be inserted into the gap between the locking piece 223 and the inner core 261, thereby slidingly pressing against the inner surface of the proximal end of the locking piece 223. The locking piece 223 is made of a highly elastic metal, such as spring steel or nickel-titanium steel.

[0072] Preferably, the cross section of the locking piece 223 is arc-shaped. Before the locking piece 223 is elastically deformed, the diameter of the outer circumference of the locking piece 223 is less than or equal to the diameter of the outer circumference of the sleeve 265 .

[0073] In this embodiment, two opposing locking tabs 223 are disposed at the distal end of the inner core 261. These two locking tabs 223 are connected to the distal end of the inner core 261 via a fixed tube 225. Both locking tabs 223 are strip-shaped and extend axially toward the proximal end. The gap between the two locking tabs 223 also extends axially. The two locking tabs 223 form a hollow tubular shape. The axially extending inner cavity defined between the two locking tabs 223 accommodates a portion of the inner core 261. The distal end of the inner core 261 is welded or adhesively secured to the interior of the fixed tube 225 through this inner cavity.

[0074] Before the sleeve 265 pushes against the locking piece 223, the guide portion 2650 of the sleeve 265 does not enter the inner cavity surrounded by the two locking pieces 223, the locking pieces 223 do not deform, the proximal ends of the two locking pieces 223 are close to each other, and the diameter of the outer circumferential surface of the two locking pieces 223 is less than or equal to the diameter of the outer circumferential surface of the sleeve 265. The operator uses handle 50 to control inner core 261, driving locking element 22c to move within the lumen of guidewire 500. When locking element 22c reaches a predetermined position, such as near the heart and the electrode, the operator uses handle 50 to hold inner core 261 stationary and push sleeve 265 distally, causing guide portion 2650 at the distal end of sleeve 265 to gradually enter the lumen bounded by the two locking tabs 223 and slidably push against the locking tabs 223, causing the proximal ends of the two locking tabs 223 to open. Specifically, the spacing between the proximal ends of the two locking tabs 223 gradually increases, causing the radial dimension of locking element 22c to gradually increase, thereby firmly gripping the inner wall of guidewire 500 and locking the distal end of the slender tubular structure. The closer guide portion 2650 is to the distal end of locking tab 223 in the lumen, the larger the radial dimension of locking element 22c. When the radial dimension of the locking member 22c is too large, the sleeve 265 can be pulled proximally to restore a portion of the deformation of the locking piece 223 to reduce the radial dimension of the locking member 22c.

[0075] In other embodiments, a plurality of locking pieces 223 are disposed on the outer periphery of the distal end of the inner core 261. The plurality of locking pieces 223 are arranged circumferentially of the inner core 261 and form an inner cavity for facilitating insertion of the distal end of the sleeve 265. That is, the plurality of locking pieces 223 are connected to the distal end of the inner core 261 via the fixing tube 225. The locking pieces 223 are arranged in a circle at intervals along the circumference of the inner core 261 and form an inner cavity for facilitating insertion of the distal end of the sleeve 265. Each locking piece 223 is strip-shaped and extends axially toward the proximal end. The gap between two adjacent locking pieces 223 also extends axially. These locking pieces 223 are arranged into a hollow tubular shape. When the guide portion 2650 of the sleeve 265 does not enter the inner cavity surrounded by the locking pieces 223, the locking pieces 223 do not deform, the proximal ends of the locking pieces 223 are close to each other, and the outer peripheral surface of the locking pieces 223 is coplanar with the outer peripheral surface of the sleeve 265; when the guide portion 2650 of the sleeve 265 is inserted into the inner cavity surrounded by the locking pieces 223, the guide portion 2650 slides against the locking pieces 223, causing the distal ends of the locking pieces 223 to elastically deform, resulting in a gradual increase in the intervals between the proximal ends of the locking pieces 223, so that the radial size of the locking piece 22c gradually increases, so as to firmly clamp the inner wall of the slender tubular structure, thereby locking the distal end of the slender tubular structure.

[0076] It can be understood that adjacent locking pieces 223 can be arranged at intervals.

[0077] Please also refer to Figure 16 and Figure 17 The structure of the wire locking device provided in the sixth embodiment of the present invention is similar to that of the fifth embodiment, except that: in the sixth embodiment, the locking member 22d is an elastic locking piece 223 disposed around the distal end of the sleeve 265. The proximal end of the locking piece 223 is connected to the distal end of the sleeve 265. The distal end of the inner core 261 is provided with a guide portion 2610. A gap is defined between the distal end of the locking piece 223 and the outer surface of the inner core 261. The inner core 261 and the sleeve 265 move relative to each other in the axial direction, so that the guide portion 2610 of the inner core 261 is inserted into the gap, thereby pushing the locking piece 223 to elastically deform, causing the distal end of the locking piece 223 to move away from the axis of the inner core 261, thereby adjusting the radial dimension of the locking member 22d. After the guide portion 2610 is located in the gap, the closer the guide portion 2610 is to the proximal end of the sleeve 265 in the gap, the greater the degree of elastic deformation of the locking piece 223 and the larger the radial size of the locking piece 223; the farther the guide portion 2610 is from the proximal end of the sleeve 265 in the gap, the smaller the degree of elastic deformation of the locking piece 223 and the smaller the radial size of the locking piece 223.

[0078] Specifically, the inner core 261 slides proximally relative to the sleeve 265, and the outer surface of the guide portion 2610 slidably pushes against the inner surface of the locking piece 223, causing the distal end of the locking piece 223 to move toward the axis away from the inner core 261. The diameter of the guide portion 2610 gradually decreases from the distal end to the proximal end, that is, the distal end diameter of the guide portion 2610 is larger than the diameter of the inner core 261, thereby facilitating the proximal end of the guide portion 2610 to be inserted between the locking piece 223 and the inner core 261, thereby changing its position and enabling it to slidably push against the inner surface of the locking piece 223.

[0079] Preferably, the cross section of the locking piece 223 is arc-shaped. Before the locking piece 223 is elastically deformed, the diameter of the outer circumference of the locking piece 223 is less than or equal to the diameter of the outer circumference of the sleeve 265 .

[0080] In this embodiment, two locking tabs 223 are disposed at the distal end of the sleeve 265, spaced apart from each other. These two locking tabs 223 are directly connected to the distal end of the sleeve 265. The locking tabs 223 are integrally formed with the sleeve 265, or welded to the periphery of the distal end of the sleeve 265. Both locking tabs 223 are strip-shaped and extend axially toward the proximal end. The gap between the two locking tabs 223 also extends axially. The two locking tabs 223 form a hollow tube, and the inner core 261 is disposed within the hollow tube formed by the two locking tabs 223.

[0081] Before the inner core 261 pushes the locking piece 223, the guide portion 2610 of the inner core 261 does not enter the inner cavity surrounded by the two locking pieces 223, the locking piece 223 does not deform, the distal ends of the two locking pieces 223 are close to each other, and the diameter of the outer circumference of the two locking pieces 223 is less than or equal to the diameter of the outer circumference of the sleeve 265; the inner core 261 is pushed to drive the guide portion 2610 to move toward the distal end, and the control sleeve 265 follows the guide portion 2610 to move toward the distal end. When the distal end of the sleeve 265 reaches When the predetermined position is reached, the control sleeve 265 remains stationary, and the inner core 261 is pulled proximally, causing the proximal end of the guide portion 2610 to gradually enter the inner cavity surrounded by the two locking pieces 223 and slide against the inner surface of the locking pieces 223, causing the distal ends of the two locking pieces 223 to open. That is, the distance between the distal ends of the two locking pieces 223 gradually increases, causing the radial dimension of the locking member 22d to gradually increase, thereby firmly clamping the inner wall of the slender tubular structure and locking the distal end of the slender tubular structure. The closer the guide portion 2610 is to the connecting sleeve 265 in the inner cavity, the larger the radial dimension of the locking member 22d. If the radial dimension of the locking member 22d is too large, the radial dimension of the locking member 22d can be reduced by pulling the sleeve 265 proximally or pushing the inner core 261 distally to restore some of the deformation of the locking pieces 223.

[0082] In other embodiments, more than two locking tabs 223 are disposed on the outer periphery of the distal end of the sleeve 265. These locking tabs 223 are spaced apart along the circumference of the sleeve 265, forming an inner cavity into which the distal end of the guide portion 2610 of the inner core 261 is inserted. Each locking tab 223 is strip-shaped and extends axially toward the proximal end. The gap between adjacent locking tabs 223 also extends axially. These locking tabs 223 form a hollow tubular shape. When the guide portion 2610 of the inner core 261 does not enter the inner cavity formed by the locking tabs 223, the locking tabs 223 do not deform. The distal ends of these locking tabs 223 are close together, and the diameter of the outer circumference of the locking tabs 223 is less than or equal to the diameter of the outer circumference of the sleeve 265. When the guide portion 2610 of the inner core 261 is inserted into the inner cavity surrounded by the locking piece 223, the guide portion 2610 slides against the inner surface of the distal end of the locking piece 223, causing the proximal end of the locking piece 223 to elastically deform, resulting in a gradual increase in the spacing between the distal ends of these locking pieces 223, and gradually increasing the radial dimension of the locking piece 22d to firmly clamp the inner wall of the slender tubular structure, thereby achieving locking of the distal end of the slender tubular structure.

[0083] Please also refer to Figures 18 to 21 The structure of the wire locking device provided in the seventh embodiment of the present invention is similar to that of the first embodiment, except that the structure of the locking member 22e and the handle 50a in the seventh embodiment are different from those in the first embodiment. Specifically:

[0084] The wire locking device of the seventh embodiment includes an inner core 261, a sleeve 265, and a locking member 22e. Sleeve 265 is a steel sleeve that fits around the outer periphery of inner core 261, i.e., inner core 261 is housed within the lumen of sleeve 265. Inner core 261 is longer than sleeve 265, and sleeve 265 is capable of sliding axially over inner core 261.

[0085] The locking member 22e is a radially adjustable tube that is sleeved around the outer periphery of the inner core 261. The sleeve 265 moves relative to the inner core 261 to change the force exerted by the sleeve 265 on the tube in the axial direction, thereby changing the radial dimension of the tube. In this embodiment, the tube is a resilient braided mesh tube that is sleeved around the outer periphery of the inner core 261. The distal end of the braided mesh tube may or may not be fixed to the inner core 261. The braided mesh tube is positioned adjacent to the distal end of the inner core 261 relative to the sleeve 265, i.e., the braided mesh tube is sleeved around the distal end of the inner core 261, while the sleeve 265 is sleeved around the proximal end of the inner core 261.

[0086] The distal end of the inner core 261 is provided with a blocking portion 269 for preventing the braided mesh tube from sliding out of the distal end of the inner core 261. The diameter of the blocking portion 269 is larger than the diameter of the distal end of the braided mesh tube. For example, a steel sleeve can be put on the distal end of the inner core 261 and fixed by welding to obtain a blocking portion 269 with a slightly larger diameter.

[0087] The braided mesh tube is elastic in both the axial and radial directions and can be made of filamentous metals such as stainless steel wire or nickel-titanium wire or polymer materials such as nylon. The two ends of the metal braided mesh tube are soldered.

[0088] When the sleeve 265 moves toward the distal end relative to the inner core 261, it abuts the proximal end of the braided mesh tube. Since the distal end of the braided mesh tube is blocked by the blocking portion 269 and cannot continue to move toward the distal end, the axial dimension of the elastic braided mesh tube gradually decreases as the sleeve 265 is squeezed, and the radial dimension gradually increases, that is, the braided mesh tube expands radially, thereby abutting the inner wall of the wire to lock the wire.

[0089] In a modified embodiment, the sleeve 265 is located at the distal end of the inner core 261 relative to the locking member 22e, and the blocking portion 269 is provided at the proximal end of the locking member 22e. When the diameter of the locking member 22e is adjusted, the sleeve 265 compresses the locking member 22e from the distal end to the proximal end.

[0090] like Figure 21 As shown, due to the relatively small diameters of the inner core 261 and the sleeve 265, direct manipulation is inconvenient during actual use. In this embodiment, to facilitate operation by medical personnel, the wire locking device is further provided with a handle 50a. The handle 50a includes a first joint 57 and a second joint 58 that are movably connected. The first joint 57 is used to connect to the inner core 261, and the second joint is used to connect to the sleeve 265. The first joint 57 is located proximal to the second joint 58. The inner core 261 axially passes through the second joint 58 and is connected to the first joint 57. The first joint 57 is connected to the proximal end of the inner core 261 by welding, bonding, screwing, or clamping, and the second joint 58 is connected to the proximal end of the sleeve 265 by welding, bonding, screwing, or clamping. The first joint 57 and the second joint 58 are used by the operator to manually control the relative movement of the inner core 261 and the sleeve 265.

[0091] In this embodiment, the first connector 57 and the second connector 58 are movably connected by means of threads or snaps. When the braided mesh tube does not need to expand, the first connector 57 and the second connector 58 are locked by the threads or snaps for synchronous movement. When the wire 500 needs to be locked, the first connector 57 and the second connector 58 are controlled to disengage from each other, and the sleeve 265 slides distally relative to the inner core 261. The force exerted by the sleeve 265 on the braided mesh tube increases, causing the braided mesh tube to expand, that is, the axial dimension of the braided mesh tube decreases while the radial dimension increases, until the braided mesh tube radially locks the inner wall of the wire 500. After the braided mesh tube locks the wire 500, it can be relocked by withdrawing the second connector 58.

[0092] Please also refer to Figures 22 to 23 The structure of the wire locking device provided in the eighth embodiment of the present invention is similar to that of the seventh embodiment. The locking member 22f in the eighth embodiment is a tube. The difference from the seventh embodiment lies in the different structure of the tube. Specifically, the locking member 22f in the eighth embodiment is a heat shrink tubing, which can be made of materials such as PTFE, FEP, and PET.

[0093] It should be noted that, without departing from the principles of the embodiments of the present invention, the specific technical solutions in the above embodiments can be applied to each other and will not be described in detail here.

[0094] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, multiple improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A wire locking system, characterized in that: The wire locking system includes a conveying assembly and a locking member, wherein the locking member is arranged on the conveying assembly and is used to be inserted into the inner lumen of a wire, and the conveying assembly is used to adjust the radial size of the locking member so that the locking member is closely attached to the inner wall of the wire in the radial direction and can drive the wire to move synchronously; the conveying assembly includes an inner core and a sleeve sleeved outside the inner core, and the locking member is arranged between the inner core and the sleeve. The inner core and the sleeve move relative to each other, so that the force applied by the inner core and the sleeve to the locking member to generate deformation changes, thereby adjusting the radial size of the locking member; The wire locking system is connected to the handle, and the handle includes a first connector and a second connector. The first connector is used to connect to the inner core, and the second connector is used to connect to the sleeve. The first connector includes a main body and a connector. The main body includes a card slot cavity, a communication hole, and an inserting cavity that pass through in the axial direction. The communication hole is located between the card slot cavity and the inserting cavity. The connector is inserted into and fixed in the inserting cavity. The second connector includes a fixing portion, a cylindrical neck portion, and a hook portion, which are sequentially arranged. The neck portion and the hook portion are accommodated in a card slot cavity, and the hook portion and the card slot cavity are engaged with each other. The second connector also includes a first cavity provided at the distal end of the second connector and a second cavity provided at the proximal end of the second connector. The first cavity and the second cavity are connected. The first cavity is used to accommodate and fix the proximal end of the sleeve, and the second cavity is used for inserting the inner core. The proximal end of the inner core sequentially passes through the first cavity, the second cavity, and the communicating hole into the plug-in cavity, and the proximal end of the inner core is clamped between the plug-in component and the inner wall of the main body adjacent to the plug-in cavity; The second joint is used to maintain the relative position relationship between the sleeve and the inner core. When the sleeve is not required to slide relative to the inner core, the second joint is used to fix the sleeve on the handle. When the sleeve needs to be pushed, the hook is withdrawn from the slot cavity, and the second joint moves toward the distal end to drive the sleeve to move toward the distal end relative to the inner core.

2. The wire locking system according to claim 1, wherein: The locking piece is arranged on the periphery of the inner core, and the inner core and the sleeve move relative to each other in the axial direction, so that the force applied to the locking piece by the end of the sleeve changes, thereby adjusting the radial size of the locking piece.

3. The wire locking system according to claim 2, wherein: The locking element is at least one elastic piece sleeved on the inner core.

4. The wire locking system according to claim 3, wherein: One end of the elastic sheet is fixedly connected to the inner core, and the sleeve and the inner core move relative to each other in the axial direction so that the force of the sleeve squeezing the other end of the elastic sheet changes.

5. The wire locking system according to claim 3, wherein: The spring sheet is provided with a plurality of through holes, the inner core is inserted into the plurality of through holes, and the sleeve slides axially relative to the inner core, so that the force of the end of the sleeve squeezing the spring sheet changes.

6. The wire locking system according to claim 5, wherein: The spring piece is in a strip shape, and a plurality of through holes are provided at intervals along the length direction of the spring piece, and the inner cores are sequentially inserted into the plurality of through holes.

7. The wire locking system according to claim 5, wherein: The spring piece is in a ring shape or a partial ring shape, a peripheral wall of the spring piece is provided with the plurality of through holes, and the inner core is inserted into the plurality of through holes of the spring piece.

8. The wire locking system according to claim 7, wherein: There are multiple spring pieces, which are arranged on the inner core along the axial direction, and the spring piece at the farthest end is fixedly connected to the inner core.

9. The wire locking system according to claim 5, wherein: A barb for inserting into the inner wall of the wire is provided between each two adjacent through holes of the elastic sheet.

10. The wire locking system according to claim 2, wherein: The locking piece is an elastic locking plate arranged on the inner core, the distal end of the locking plate is connected to the inner core, the sleeve is adjacent to the proximal end of the inner core relative to the locking piece, and a guide portion is provided at the distal end of the sleeve. There is a gap between the proximal end of the locking plate and the outer surface of the inner core. The sleeve slides relative to the inner core, so that the position of the guide portion inserted into the gap changes, thereby adjusting the radial size of the locking piece.

11. The wire locking system according to claim 10, wherein: A plurality of locking pieces are arranged on the outer periphery of the distal end of the inner core. The plurality of locking pieces are arranged along the circumference of the inner core and form an inner cavity for facilitating the insertion of the distal end of the sleeve.

12. The wire locking system according to claim 2, wherein: The locking piece is a radially adjustable tube sleeved on the periphery of the inner core. The sleeve and the inner core move relative to each other to change the force of the sleeve squeezing the tube axially, thereby changing the radial size of the tube.

13. The wire locking system according to claim 12, wherein: The tube body is an elastic braided mesh tube or a heat shrink tube.

14. The wire locking system according to claim 12, wherein: A blocking portion is protruding from the inner core, and the blocking portion is used to abut against one end of the tube body to limit the movement range of the tube body in the axial direction.

15. The wire locking system according to claim 1, wherein: The locking piece is an elastic locking plate arranged on the sleeve, the proximal end of the locking plate is connected to the distal end of the sleeve, the inner core and the sleeve move relative to each other in the axial direction, so that the distal end of the inner core squeezes the distal end of the locking plate, causing the locking plate to elastically deform to change the radial size of the locking piece.

16. The wire locking system according to claim 15, wherein: A guide portion is provided at the distal end of the inner core, and the diameter of the guide portion gradually increases from the proximal end to the distal end. There is a gap between the distal end of the locking plate and the outer surface of the inner core. The inner core and the sleeve move relative to each other in the axial direction to change the position of the guide portion in the gap, thereby adjusting the radial size of the locking piece.

17. The wire locking system according to claim 15, wherein: A plurality of locking pieces are provided at the distal end of the sleeve, and the plurality of locking pieces are arranged along the circumference of the sleeve. The plurality of locking pieces form an inner cavity for facilitating the insertion of the end portion of the inner core.

18. The wire locking system according to any one of claims 1 to 17, wherein: The conveying assembly further includes a positioning assembly disposed between the inner core and the sleeve, and the positioning assembly is used to limit relative movement between the inner core and the sleeve along the axial direction.

19. The wire locking system according to claim 18, wherein: The positioning assembly includes a first positioning member fixedly connected to the inner core and a second positioning member fixedly connected to the sleeve. The second positioning member is cylindrical and forms an inner cavity. The first positioning member is used to be inserted axially into the inner cavity of the second positioning member to fix the first positioning member and the second positioning member together.

20. The wire locking system according to claim 19, wherein: The outer circumference of the first positioning member is provided with a plurality of spaced-apart locking holes along the axial direction, and the inner circumference of the second positioning member is provided with an elastic locking block, which can be selectively inserted into any of the locking holes to position the first positioning member at different positions of the inner cavity of the second positioning member.

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