Locking device

Abstract

The invention relates to a locker, which is used for locking a target component and comprises a locking bolt and a locking nut, the lock cylinder is arranged in the locking bolt; the lock cap is movably arranged on the locking bolt, and when the lock cap moves relative to the locking bolt, the lock cylinder can be gradually clamped, so that the lock cylinder gradually clamps the target component; and the multi-stage locking structure is arranged on the locking bolt and the lock cap, so that the lock cap can gradually extrude the lock cylinder, and the target part is locked step by step through the lock cylinder. By means of the multi-stage locking structure, stage-by-stage locking of the lock cap and the locking bolt in different states can be achieved, the lock cylinder can be limited, a target part can be clamped, and the target part can be clamped, quantitative locking of the locker is achieved, and the influence of manual operation on the performance of the locker for clamping the target part is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a locking device. Background Art

[0002] During the processing of the filter recovery kit, the production staff will connect the locker to the conductive wire by twisting it. This operation is only to prevent the locker from relative displacement with the conductive wire during transportation. At this time, the locking force provided by the locker is relatively small. During the operation, the surgeon tightly connects the locker to the conductive wire by twisting it. Since the end of the conductive wire is connected to the catcher that catches the filter, it will be stressed when the filter is recovered, so this locking requires the locker to provide a larger locking force.

[0003] At present, all locking devices are equipped with long-segment threads. The lock core is squeezed by twisting the lock cap, and then the lock core locks the conductive wire. The degree of squeezing of the lock core by the lock cap determines the locking force of the conductive wire. Due to the limitations of the long-segment threaded connection structure, the degree of squeezing of the lock core is difficult to judge, resulting in the inability to quantitatively control the locking force of the conductive wire. It is greatly affected by human factors, and there is a risk of the locker falling off before use and the filter recovery failure caused by insufficient locking force during surgery, which affects the performance. Summary of the invention

[0004] Based on this, it is necessary to provide a locking device that can achieve quantitative locking and reduce the impact of human operation on the performance of the locking device clamping the conductive wire in order to address the problem that the locking force caused by the current locking device through threaded locking of the conductive wire cannot be quantified.

[0005] A locking device, used for locking a target component, characterized by comprising:

[0006] Locking bolt;

[0007] A lock core, disposed in the locking bolt;

[0008] A lock cap is movably disposed on the locking bolt, and when the lock cap moves relative to the locking bolt, it can gradually clamp the lock core, so that the lock core gradually clamps the target component;

[0009] The multi-stage locking structure is separately arranged on the locking bolt and the locking cap, so that the locking cap can gradually squeeze the lock core and lock the target component step by step through the lock core.

[0010] In one embodiment of the present application, the multi-stage locking structure includes a locking member and a mating member, wherein the locking member is arranged on the locking bolt, and the mating member is arranged on the lock cap, and the lock cap implements step-by-step squeezing of the lock core through the locking member and the mating member, so that the lock core locks the target component step by step.

[0011] In one embodiment of the present application, the locking member includes a first locking member, a second locking member and a third locking member, the first locking member, the second locking member and the third locking member are arranged at intervals along the axial direction of the locking bolt, and the matching member includes a first matching member and a second matching member, the first matching member and the second matching member are arranged at intervals along the axial direction of the lock cap;

[0012] When the locking cap moves relative to the locking bolt, the first mating piece cooperates with the first locking piece to complete the first level locking, the second mating piece cooperates with the second locking piece to complete the second level locking, and the first mating piece cooperates with the third locking piece to complete the third level locking.

[0013] In one embodiment of the present application, the locking member includes a first spiral portion and a fourth locking member, the first spiral portion and the fourth locking member are spaced apart along the axial direction of the locking bolt, and the plurality of matching members include a second spiral portion and a fourth matching member, the second spiral portion and the fourth matching member are spaced apart along the axial direction of the locking cap;

[0014] When the locking cap moves relative to the locking bolt, the first spiral portion cooperates with the second spiral portion to complete the first-stage locking and the second-stage locking, and the fourth locking member cooperates with the fourth matching member to complete the third-stage locking.

[0015] In one embodiment of the present application, the locking member and the matching member are both boss structures.

[0016] In an embodiment of the present application, the lock cap has an annular groove, and the first matching piece and the second matching piece are respectively disposed on opposite side walls of the annular groove.

[0017] In one embodiment of the present application, the locking device further comprises a sealing structure, and the sealing structure is arranged between the lock cap and the lock core;

[0018] The sealing structure comprises a sealing column and a lock core cover, one end of the sealing column abuts against the lock cap, and the other end abuts against the lock core cover, and the lock core cover abuts against the lock core.

[0019] In an embodiment of the present application, the locking bolt further includes a screw-on component, and the screw-on component is disposed on an inner wall of an end of the locking bolt away from the locking cap.

[0020] In one embodiment of the present application, the lock core has a guide slope, and the lock cap has a second mounting hole. When the lock cap moves toward the locking bolt, the edge of the second mounting hole gradually presses against the guide slope to enable the lock core to clamp and tighten the target component.

[0021] In one embodiment of the present application, the lock core further includes a clamping portion and a supporting portion, the guiding slope is arranged on the clamping portion, and the clamping portion is used to clamp the target component.

[0022] After adopting the above technical solution, this application has at least the following technical effects:

[0023] In the locking device of the above embodiment, the multi-stage locking structure can realize the step-by-step locking of the lock cap and the locking bolt in different states, and can limit the lock core, clamp the conductive wire, and clamp the conductive wire respectively. In this way, the multi-stage locking structure can realize the quantitative locking of the locking device, reduce the influence of human operation on the performance of the locking device clamping the conductive wire, and facilitate the operation of the operator. Moreover, the locking device locks the lock cap and the locking bolt through the multi-stage locking structure, so that the structure of the locking device is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the locking device in the first embodiment of the present application.

[0025] Figure 2 for Figure 1 Schematic diagram of the locking bolt in the locking device shown.

[0026] Figure 3 for Figure 2 A cross-sectional view of the locking bolt is shown.

[0027] Figure 4 for Figure 3 A cross-sectional view of the locking bolt is shown.

[0028] Figure 5 for Figure 1 A cross-sectional view of the locking cap in the locking device shown looking downward.

[0029] Figure 6 for Figure 1 The schematic diagram of the structure of the lock core in the locking device shown.

[0030] Figure 7 for Figure 6 A top view of the lock cylinder is shown.

[0031] Figure 8 It is a cross-sectional view of the locking device in the second embodiment of the present application.

[0032] Fig. 9 for Figure 8 A bottom view of the locking cap in the locking device is shown.

[0033] Fig.10 for Fig. 9 A cross-sectional view of the locking cap is shown.

[0034] Fig.11 for Figure 8 Schematic diagram of the locking bolt in the locking device shown.

[0035] Fig.12 for Fig.11 A cross-sectional view of the locking bolt is shown.

[0036] Fig.13 for Figure 8 Schematic diagram of the sealing column in the locking bolt shown.

[0037] Fig.14 for Figure 8 Schematic diagram of the lock cylinder cover in the lock shown.

[0038] Fig.15 for Fig.14 A cross-sectional view of the lock cylinder cover is shown.

[0039] Fig.16 for Figure 8 The schematic diagram of the locking device when locked three times is shown; wherein Figure (a) is a schematic diagram of the first-level locking of the locking device, Figure (b) is a schematic diagram of the second-level locking of the locking device, and Figure (c) is a schematic diagram of the third-level locking of the locking device.

[0040] Fig.17 It is a cross-sectional view of the locking device in the third embodiment of the present application.

[0041] Fig.18 For Fig.17 Schematic diagram of the locking bolt in the locking device shown.

[0042] Fig.19 for Fig.18 A cross-sectional view of the locking bolt is shown.

[0043] Wherein: 10, locking device; 100, locking bolt; 110, first mounting hole; 120, first connecting column; 130, second connecting column; 140, screw-on member; 200, lock core; 210, second through hole; 230, guide slope; 240, clamping part; 250, supporting part; 300, locking cap; 310, first through hole; 320, annular groove; 330, second mounting hole; 340, supporting column; 400, three-level locking structure; 410, first locking member; 420, second locking member; 430, third locking member; 440, first matching member; 450, second matching member; 460, first spiral portion; 470, second spiral portion; 480, fourth locking member; 490, fourth matching member; 500, sealing structure; 510, sealing column; 511, third through hole; 520, lock core cover; 521, fourth through hole; 522, fourth mounting hole; 70, conductive wire. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the present application, "proximal end" and "distal end" are used to describe the relative positions and orientations of various elements and components of a medical device. Although non-limiting, the "distal end" is usually the end of the medical device that first enters the patient's body during use, and the "proximal end" is the end opposite to the "distal end", which is the end closer to the operator.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0051] The present application provides a locking device 10 for locking a target component, comprising: a locking bolt 100, a lock core 200, a lock cap 300 and a multi-stage locking structure. The lock core 200 is arranged in the locking bolt 100; the lock cap 300 is movably arranged on the locking bolt 100, and the lock cap 300 can gradually clamp the lock core 200 when it moves relative to the locking bolt 100, so that the lock core 200 gradually clamps the target component; the multi-stage locking structure is separately arranged on the locking bolt 100 and the lock cap 300, so that the lock cap 300 can gradually squeeze the lock core 200, and the target component is locked step by step through the lock core 200, so as to realize the multi-stage locking and quantitative locking of the locking device 10, reduce the influence of human operation on the performance of the locking device 10 when locking, and facilitate the operation of the operator. It can be understood that the technical solution of the present application does not specifically limit the applicable application scenarios and the number of locking levels. For ease of description, the following will take the application scenario of the locker 10 locking the target component, that is, the conductive wire 70, and the three-level locking as an example for description.

[0052] See also Figure 1 , Figure 8 and Fig.17The present application provides a locking device 10. The locking device 10 can lock the conductive wire 70 so that the conductive wire 70 does not move relative to the locking device 10. The locking device 10 can be locked in three times to achieve quantitative locking of the locking device 10, reduce the impact of manual operation on the performance of the locking device 10 during locking, and facilitate the operation of the operator. The specific structure of the locking device 10 of an embodiment is introduced below.

[0053] In one embodiment, the lock 10 includes a locking bolt 100, a lock core 200, a lock cap 300, and a multi-stage locking structure. The lock core 200 is disposed in the locking bolt 100. The lock cap 300 is movably disposed at one end of the locking bolt 100, and the lock cap 300 can gradually clamp the lock core 200 when it moves relative to the locking bolt 100, so that the lock core 200 gradually clamps the conductive wire 70. Specifically, the multi-stage locking structure is a three-stage locking structure 400. The three-stage locking structure 400 is separately disposed in the locking bolt 100 and the lock cap 300, so as to realize the three-stage locking connection between the lock cap 300 and the locking bolt 100, and gradually lock the conductive wire 70 therein.

[0054] See also Figure 1 and Figure 8 The conductive wire 70 can pass through the lock cap 300, the lock core 200 and the locking bolt 100 and extend out of the locker 10. The two ends of the conductive wire 70 are respectively connected to the operating instrument and the filter catcher. When the user recycles the filter, the locker 10 needs to be used to lock the conductive wire 70 to prevent the conductive wire 70 from moving relative to the locker 10, so as to facilitate the recovery of the filter. When the locker 10 locks the conductive wire 70, the locker 10 can provide a large clamping force for the conductive wire 70 to ensure that the locker 10 can reliably clamp the conductive wire 70.

[0055] Optionally, the lock cap 300 has a first through hole 310, the lock core 200 has a second through hole 210, the first through hole 310 and the second through hole 210 are coaxially arranged and connected, and the conductive wire 70 is passed through. The locking bolt 100 has a hollow first mounting hole 110, the lock core 200 is located in the first mounting hole 110, and the first mounting hole 110 can communicate with the first through hole 310 and the second through hole 210. In this way, the conductive wire 70 can pass through the first through hole 310, the second through hole 210 and the first mounting hole 110 in sequence and extend out of the locker 10.

[0056] Specifically, the lock core 200 is a structural member for locking the conductive wire 70, and the locking bolt 100 is equivalent to the fixed seat of the lock 10. The lock 10 clamps the conductive wire 70 through the cooperation of the lock core 200 and the lock cap 300, and connects the filter catcher through the conductive wire 70. The lock cap 300 is equivalent to the fixed cover of the lock 10, and the lock cap 300 can abut the lock core 200. The connection between the locking bolt 100 and the lock cap 300 is realized by the three-level locking structure 400, so that the lock cap 300 is installed at one end of the locking bolt 100, and the lock core 200 is limited to limit the lock core 200 in the locking bolt 100. The lock cap 300 is moved axially so that the lock core 200 clamps or clamps the conductive wire 70. It is worth noting that the axial direction in this application refers to the length direction along the lock 10, and the circumferential direction refers to the axial direction around the lock 10.

[0057] In order to better explain the locking principle of the three-level locking structure 400, the three-level locking structure 400 is described in detail here. The three-level locking structure 400 is respectively a first-level locking structure, a second-level locking structure and a third-level locking structure.

[0058] In some embodiments, before the lock 10 leaves the factory, the locking bolt 100, the lock core 200 and the lock cap 300 may be assembled. The lock core 200 is installed in the locking bolt 100, the lock cap 300 is movably installed at one end of the locking bolt 100, and the lock cap 300 and the locking bolt 100 are locked for the first time through the first-level locking structure, so that the lock cap 300 is reliably installed at one end of the locking bolt 100, and the lock core 200 is prevented from falling from the locking bolt 100. In this way, the first-level locking of the locking bolt 100 and the lock cap 300 is completed. In this way, when the lock 10 is transported, due to the locking of the first-level locking structure, the lock cap 300 will not fall off the locking bolt 100, and the lock core 200 is prevented from falling from the locking bolt 100.

[0059] When assembling the lock 10, the conductive wire 70 needs to be inserted into the lock 10. To prevent the conductive wire 70 from moving in the lock 10, the lock 10 needs to clamp the conductive wire 70. The operator inserts the conductive wire 70 into the lock 10 and operates (presses) the lock cap 300 to move the lock cap 300 toward the direction close to the locking bolt 100. During the movement, the lock cap 300 can squeeze the lock core 200, so that the lock core 200 can gradually approach the conductive wire 70 and clamp the conductive wire 70, completing the second-level locking of the locking bolt 100 and the lock cap 300, and preventing the conductive wire 70 from falling off from the lock 10. At this time, the lock core 200 can clamp the conductive wire 70, but the lock core 200 will not clamp the conductive wire 70 too much, and the conductive wire 70 just cannot move relative to the lock 10.

[0060] During the operation of retrieving the filter, when the conductive wire 70 reaches the predetermined position, the snare (not shown) at the distal end of the conductive wire 70 will trap the filter recovery hook (not shown). At this time, the operator pushes the snare tube (not shown) and the Y-shaped valve (not shown) toward the distal end along the conductive wire to reduce the size of the snare at the distal end of the conductive wire 70, so that the conductive wire 70 and the filter recovery hook are firmly fixed; then the locking cap 300 is withdrawn toward the proximal end, and the locking device 10 is pushed to move on the conductive wire 70. When the locking device 10 abuts against the proximal end of the Y-shaped valve, the locking cap 300 is pressed to move the locking cap 300 toward the direction close to the locking bolt 100. During the movement, the locking cap 300 can continue to squeeze the lock core 200. When the locking cap 300 moves into place, the lock core 200 can clamp the conductive wire 70. In this way, the third-level locking of the locking bolt 100 and the locking cap 300 is completed. At this time, the locking device 10 can clamp the conductive wire 70 while ensuring that the position of the snare tube relative to the snare does not change. Subsequently, the locking device 10 is pulled to keep it stationary and the recovery sheath is pushed toward the distal end to collect the captured filter into the recovery sheath, and finally the entire system is withdrawn from the body.

[0061] The locker 10 of the present application is designed with a three-level locking structure 400 according to its use state to achieve a three-level locking function. It should be noted here that clamping means clamping, and clamping means tightly clamping, and the force of clamping on the conductive wire 70 is less than the force of clamping on the conductive wire 70. After the lock core 200 clamps the conductive wire 70, the conductive wire 70 will not move relative to the lock core 200 without the action of external force. After the lock core 200 clamps the conductive wire 70, the lock core 200 applies a large clamping force to the conductive wire 70, and the conductive wire 70 will not move relative to the lock core 200 regardless of whether there is an external force.

[0062] The lock 10 of the above embodiment can realize the step-by-step locking of the lock cap 300 and the locking bolt 100 in different states through the three-level locking structure 400, and can limit the lock core 200, clamp the conductive wire 70, and clamp the conductive wire 70 respectively. In this way, the three-level locking structure 400 can realize the quantitative locking of the lock 10, reduce the impact of human operation on the performance of the lock 10 clamping the conductive wire 70, and facilitate the operation of the operator. Moreover, the lock 10 locks the lock cap 300 and the locking bolt 100 through the three-level locking structure 400, so that the structure of the lock 10 is simple and easy to use.

[0063] See also Figure 1 , Figure 8 and Fig.17 In one embodiment, the three-level locking structure 400 includes a plurality of locking members and a plurality of matching members, wherein the plurality of locking members are arranged on the locking bolt 100, and the plurality of matching members are arranged on the lock cap 300. The lock cap 300 gradually squeezes the lock core 200 through the locking members and the matching members, so that the lock core 200 locks the conductive wire 70 step by step.

[0064] The locking member is located on the inner wall and the outer wall of the locking bolt 100, and the matching member is located in the locking cap 300. When the locking cap 300 is sleeved on the locking bolt 100, the locking member can cooperate with the matching member to lock the locking cap 300 to the locking bolt 100. Moreover, there can be multiple locking members and matching members, and multiple locking members and multiple matching members cooperate with each other to realize the three-level locking of the lock 10.

[0065] In one embodiment, the locking member and the matching member adopt a boss-boss matching structure. Specifically, it is an annular boss. When the locking member and the matching member adopt a boss-boss matching structure, such as Figures 1 to 7 As shown, the locking member can slide over the matching member, and the locking cap 300 is locked by the locking member and the matching member. When the bosses are engaged, the operator will be given subjective feedback, such as a sound when engaged, so that the operator can intuitively feel the position of the lock cap 300 and the locking bolt 100, so as to quantify the locking operation and reduce the difficulty of the operator. Of course, in other embodiments of the present application, the locking member and the matching member can also adopt the matching form of a boss and a groove, and the specific structure is not limited here.

[0066] It is worth noting that there is no principled limitation on the location, specific structure and number of the locking member and the matching member, as long as the three-level locking of the lock 10 can be satisfied. For example, the lock cap 300 has two matching members arranged at intervals, and the locking bolt 100 has three locking members corresponding to the matching members. Of course, in other embodiments of the present application, the lock cap 300 has three locking members arranged at intervals, and the locking bolt 100 has three matching members corresponding to the locking member, or the number of the locking member and the matching member can be other numbers, which will not be repeated here. The following introduces several location and specific structure of the locking member and the matching member.

[0067] First embodiment

[0068] See also Figures 1 to 7In one embodiment, the plurality of locking members include a first locking member 410, a second locking member 420, and a third locking member 430, which are spaced apart along the axial direction of the locking bolt 100, and the plurality of matching members include a first matching member 440 and a second matching member 450, which are spaced apart along the axial direction of the locking cap 300. More specifically, the first locking member 410 and the third locking member 430 are disposed on the outer wall of the locking bolt 100, the second locking member 420 is disposed on the inner wall of the locking bolt 100, the first matching member 440 is disposed on the inner wall of the locking cap 300, and the second matching member 450 is disposed on the opposite wall surface of the inner wall of the locking cap 300. When the locking cap 300 moves relative to the locking bolt 100, the first matching piece 440 first cooperates with the first locking piece 410 to perform the first level locking, and then the second matching piece 450 cooperates with the second locking piece 420 to perform the second level locking, and finally the first matching piece 440 cooperates with the third locking piece 430 to perform the third level locking.

[0069] See also Figure 4 and Figure 5 In one embodiment, the lock cap 300 has an annular groove 320, which extends along the circumference of the lock cap 300 and is provided for the end of the locking bolt 100 to be installed. The annular groove 320 has opposite side walls, and the first matching piece 440 and the second matching piece 450 are respectively provided on the opposite side walls. Specifically, the outer side wall of the annular groove 320 is the first side wall, and the inner side wall of the annular groove 320 is the second side wall. The first side wall and the second side wall are arranged oppositely, and the first matching piece 440 is arranged on the first side wall, and the second matching piece 450 is arranged on the second side wall. When the lock cap 300 is installed on one end of the locking bolt 100, the end of the locking bolt 100 can be located in the annular groove 320. Optionally, the first matching piece 440 is located at the bottom of the first side wall, and the second matching piece 450 is located at the bottom of the second side wall.

[0070] In this embodiment, the lock cap 300 further has a second mounting hole 330, which is located in the middle area inside the lock cap 300 and extends along the circumference of the lock cap 300. When the lock cap 300 moves relative to the locking bolt 100, the lock cap 300 can gradually squeeze the top of the lock core 200, so that the top of the lock core 200 gradually enters the second mounting hole 330 of the lock cap 300. In the process of the lock core 200 gradually entering the second mounting hole 330, the head end of the lock core 200 will be squeezed to reduce the cross-sectional area of ​​the second through hole 210 at the head end of the lock core 200, so that the lock core 200 clamps and then clamps the conductive wire 70.

[0071] See also Figure 1-Figure 3In one embodiment, the locking bolt 100 includes a first connecting column 120 and a second connecting column 130 which are hollow, a first locking member 410 and a third locking member 430 are located on the outer wall of the first connecting column 120, and a second locking member 420 is located on the inner wall of the first connecting column 120, and the first locking member 410, the second locking member 420 and the third locking member 430 are spaced apart along the axial direction of the first connecting column 120. The lock core 200 is located at the connection between the first connecting column 120 and the second connecting column 130. In this way, when the first connecting column 120 is installed in the annular groove 320, the first locking member 410 first cooperates with the first matching member 440, the second locking member 420 cooperates with the second matching member 450, and finally the third locking member 430 cooperates with the first matching member 440.

[0072] Optionally, the first mounting hole 110 includes a first hole and a second hole, the first hole and the second hole are connected and coaxially arranged, the first hole is located in the first connecting column 120, the second hole is located in the second connecting column 130, and the inner diameter of the first hole is larger than the inner diameter of the second hole, and the first hole and the second hole are arranged in a stepped shape to form a limiting step at the connection between the first connecting column 120 and the second connecting column 130, so as to limit the lock core 200 and prevent the lock core 200 from falling from the bottom of the locking bolt 100. Of course, in other embodiments of the present application, a limiting groove can also be provided on the outer wall of the lock core 200, and a limiting boss can be provided on the inner wall of the first mounting hole 110, and the limiting of the lock core 200 can be achieved by the cooperation between the limiting boss and the limiting groove.

[0073] See also Figure 1 , Figure 6 and Figure 7 In one embodiment, the lock core 200 has a guide slope 230. When the lock cap 300 moves toward the direction close to the locking bolt 100, the guide slope 230 gradually contacts the edge of the second mounting hole 330, and the edge of the second mounting hole 330 gradually presses against the guide slope 230, so that the head end of the lock core 200 at the guide slope 230 gradually shrinks, thereby gradually reducing the cross-sectional area of ​​the second through hole 210 at the head end of the lock core 200, so that the lock core 200 clamps and then clamps the conductive wire 70. It is worth noting that the structure of the lock core 200 in the following embodiments is substantially the same as that of this embodiment, and will not be repeated in the following text.

[0074] Optionally, the lock core 200 includes a clamping portion 240 and a supporting portion 250, the guiding bevel 230 is provided on the clamping portion 240, and the clamping portion 240 is used to clamp the conductive wire 70. The supporting portion 250 is installed in the second connecting column 130 of the locking bolt 100, the clamping portion 240 is located in the first connecting column 120 of the locking bolt 100, and the guiding bevel 230 is located on the outer wall of the clamping portion 240. Optionally, the clamping portion 240 includes a plurality of clamping blocks, and the plurality of clamping blocks are evenly distributed along the circumference of the axis of the lock core 200. When the clamping blocks abut against the edges of the second mounting holes 330, the plurality of clamping blocks can be brought close to each other along the radial direction of the lock core 200 to clamp and tighten the conductive wire 70. The radial direction here refers to the direction perpendicular to the axis of the lock core 200.

[0075] In some embodiments, before the lock 10 leaves the factory, the lock cap 300 may be pressed first, and the first matching piece 440 of the lock cap 300 is engaged with the first locking piece 410 of the locking bolt 100 to perform the first-level locking, so that the lock cap 300 and the locking bolt 100 are connected. In this way, the lock cap 300 will not fall off the locking bolt 100 during the transportation of the lock 10.

[0076] When assembling the lock 10, insert the conductive wire 70, and the conductive wire 70 passes through the first mounting hole 110 of the locking bolt 100 and the second through hole 210 of the lock core 200 in sequence, and then passes the conductive wire 70 through the first through hole 310 of the lock cap 300. Press the lock cap 300, and the second matching piece 450 is engaged with the second locking piece 420 to perform the second level of locking. At this time, the first matching piece 440 is not engaged with the third locking piece 430, and the lock 10 clamps the conductive wire 70, and will not be locked too much, but only prevents the conductive wire 70 and the lock 10 from moving relative to each other when there is no external force, so as to prevent the conductive wire 70 from falling off from the lock 10, and thus the assembly of the lock 10 and the conductive wire 70 is completed.

[0077] During the operation of recovering the filter, when the conductive wire 70 reaches the predetermined position, the snare at the distal end of the conductive wire 70 will wrap around the recovery hook of the filter. At this time, the operator pushes the snare tube and the Y-shaped valve toward the distal end along the conductive wire to reduce the size of the snare at the distal end of the conductive wire 70, so that the conductive wire 70 and the recovery hook of the filter are firmly fixed; then withdraw the locking cap 300 toward the proximal end, so that the second matching piece 450 and the second locking piece 420 are out of engagement, thereby releasing the clamping of the conductive wire 70. At this time, the first matching piece 440 and the first locking piece 410 are still in a buckled state to ensure that the locking cap 300 will not fall off during the operation; the locking device 10 is pushed to move on the conductive wire 70. When the locking device 10 abuts the proximal end of the Y-type valve, the locking cap 300 is pressed to move the locking cap 300 toward the direction close to the locking bolt 100, and the second matching piece 450 in the locking cap 300 is buckled with the second locking piece 420 of the locking bolt 100, and the first matching piece 440 in the locking cap 300 is buckled with the third locking piece 430 of the locking bolt 100 in turn, completing the third level of locking, while completely locking the conductive wire 70, it can also ensure that the position of the snare tube relative to the snare does not change, and then the locking device 10 is pulled to keep it stationary and the recovery sheath is pushed to the distal end to put the captured filter into the recovery sheath, and finally the entire system is withdrawn from the body.

[0078] Second embodiment

[0079] It is worth noting that the structure of the locker 10 in this embodiment is substantially the same as that of the locker 10 in the first embodiment, except that the locker 10 in this embodiment has an additional sealing function. In this embodiment, the specific coordination of the three-level locking structure 400 is not described, and only the difference between this embodiment and the first embodiment is described.

[0080] See also Figures 8 to 16 In one embodiment, the locking device 10 further includes a sealing structure 500, which is disposed in the locking bolt 100, between the locking cap 300 and the locking core 200 and abuts against the locking cap 300 and the locking core 200. In this way, after the sealing structure 500 is installed on the locking bolt 100, the sealing performance of the locking device 10 can be ensured. In this way, the locking device 10 can ensure its sealing effect without being matched with the Y valve when in use, and then the locking device 10 can be directly connected to the Luer connector of the snare tube through the conductive wire 70, which is simple and convenient to operate and easy to use.

[0081] See also Figure 8 , Figures 13 to 16In one embodiment, the sealing structure 500 includes a sealing column 510 and a lock core cover 520. One end of the sealing column 510 abuts against the lock cap 300, and the other end abuts against the lock core cover 520. The lock core cover 520 abuts against the lock core 200. The lock core cover 520 is located on the side of the lock core 200 close to the lock cap 300, and the sealing column 510 is located on the side of the lock core cover 520 away from the lock core 200. In this way, the bottom of the lock core cover 520 squeezes the lock core 200, and the top of the sealing column 510 abuts against the lock cap 300. The sealing column 510 is squeezed to ensure the sealing of the lock 10.

[0082] See also Figure 8 and Fig.13 Optionally, the sealing column 510 has a third via hole 511, and the third via hole 511 is connected to the first via hole 310 and the second via hole 210 for the conductive wire 70 to pass through. Optionally, the sealing column 510 is made of silicone material. Of course, in other embodiments of the present application, the sealing column 510 can also be made of other sealing materials.

[0083] See also Figure 8 , Fig.14 and Fig.15 Optionally, the lock core cover 520 has a fourth through hole 521 and a fourth mounting hole 522, wherein the fourth through hole 521 is located on a side of the fourth mounting hole 522 away from the lock core 200 and communicates with the fourth through hole 521. The conductive wire 70 is passed through the fourth through hole 521, and the fourth mounting hole 522 is used to accommodate the clamping portion 240 of the lock core 200.

[0084] See also Figure 8 , Fig. 9 and Fig.10 The lock cap 300 has a support column 340, which is located in the middle area of ​​the lock cap 300 and is surrounded by an annular groove 320 with the inner wall of the lock cap 300. The first through hole 310 passes through the support column 340. When the lock cap 300 is installed on the locking bolt 100, at least part of the support column 340 can extend into the first installation hole 110 and press the sealing column 510, and then squeeze the clamping part 240 of the lock core 200 through the lock core cover 520, so as to limit the lock core 200, clamp the conductive wire 70, and clamp the conductive wire 70.

[0085] In one embodiment, the locking bolt 100 further includes a screw-on member 140, which is disposed on the inner wall of the locking bolt 100 away from the locking cap 300 and located at the bottom of the first mounting hole 110, and is used to connect a loop tube with a Luer connector, thereby ensuring the connection reliability and the sealing effect. It is understandable that in order to ensure the sealing effect of the locking device 10, the sealing structure 500 can also be applied to the first and third embodiments, and those skilled in the art can reasonably set it according to the needs, which will not be repeated here.

[0086] See also Fig.16 In some embodiments, before the lock 10 leaves the factory, the lock core 200, the sealing column 510, and the lock core cover 520 are placed in the locking bolt 100 in advance, and the lock cap 300 is pressed, and the first matching piece 440 of the lock cap 300 is engaged with the first locking piece 410 of the locking bolt 100 to perform the first-level locking, such as Fig.16 As shown in (a), the lock cap 300 is connected to the locking bolt 100. In this way, the lock cap 300 will not fall off from the locking bolt 100 during transportation of the lock 10.

[0087] When assembling the lock 10, the conductive wire 70 is inserted, and the conductive wire 70 passes through the first mounting hole 110 of the locking bolt 100, the second through hole 210 of the lock core 200, the fourth through hole 521 of the lock core 200, the third through hole 511 of the sealing column 510, and the first through hole 310 of the lock cap 300, and then passes out of the lock 10. Press the lock cap 300, and the second matching piece 450 is engaged with the second locking piece 420 to perform the second level of locking. At this time, the first matching piece 440 is not engaged with the third locking piece 430, as shown in FIG. Fig.16 As shown in (b), the conductive wire 70 is clamped by squeezing the lock core 200, and the locking force is small, which only prevents the conductive wire 70 and the locker 10 from moving relative to each other, preventing the conductive wire 70 from falling off from the locker 10. In this way, the assembly of the locker 10 and the conductive wire 70 is completed.

[0088] During the filter recovery operation, after the conductive wire 70 is partially implanted into the human body and reaches the predetermined position, the snare at the distal end of the conductive wire 70 will trap the filter recovery hook, and the operator will withdraw the locking cap 300 proximally, so that the second matching piece 450 and the second locking piece 420 are disengaged, thereby releasing the clamping of the conductive wire 70. At this time, the first matching piece 440 and the first locking piece 410 are still in a buckled state to ensure that the locking cap 300 will not fall off during the operation; then grasp the locking device and push the snare tube toward the distal end along the conductive wire to reduce the size of the snare at the distal end of the conductive wire 70; press the locking cap 300 to move the locking cap 300 toward the direction close to the locking bolt 100, and sequentially buckle the second matching piece 450 in the locking cap 300 with the second locking piece 420 of the locking bolt 100, and buckle the first matching piece 440 in the locking cap 300 with the third locking piece 430 of the locking bolt 100, to complete the third level of locking, and completely lock the conductive wire 70, such as Fig.16 As shown in (c), the snare on the conductive wire 70 is firmly fixed to the filter recovery hook; subsequently, the locking device is pulled to keep it stationary and the recovery sheath is pushed toward the distal end to receive the captured filter into the recovery sheath, and finally the entire system is withdrawn from the body.

[0089] Third embodiment

[0090] It is worth noting that the structure of the locking device 10 in this embodiment is substantially the same as that of the locking device 10 in the first embodiment, and only the differences between this embodiment and the first embodiment are described here.

[0091] See also Figures 17 to 19 In one embodiment, the plurality of locking members include a first spiral portion 460 and a fourth locking member 480, and the plurality of matching members include a second spiral portion 470 and a fourth matching member 490. The first spiral portion 460 and the fourth locking member 480 are arranged on the locking bolt 100 and are spaced apart along the axial direction of the locking bolt 100. The second spiral portion 470 and the fourth matching member 490 are arranged on the lock cap 300 and are spaced apart along the axial direction of the lock cap 300. The second spiral portion 470 is screwed and connected with the first spiral portion 460, and the fourth locking member 480 is snapped and matched with the fourth matching member 490. In this embodiment, the first spiral portion 460 and the second spiral portion 470 are threaded structures, and the fourth locking member 480 and the fourth matching member 490 are boss structures. It can be understood that the matching structure of the fourth locking member 480 and the fourth matching member 490 can also be the matching of a boss and a groove.

[0092] In some embodiments, when the lock 10 is assembled at the factory, the lock core 200 is installed in the locking bolt 100, the lock cap 300 is installed at one end of the locking bolt 100, and the lock cap 300 is slightly tightened so that the first spiral portion 460 and the second spiral portion 470 are screwed together to prevent the lock cap 300 from falling off the locking bolt 100, thereby achieving the first level of locking. In this way, the lock cap 300 is prevented from falling off the locking bolt 100 during transportation of the lock 10.

[0093] When assembling the lock 10, the conductive wire 70 is inserted, and the conductive wire 70 passes through the first mounting hole 110 of the locking bolt 100 and the second through hole 210 of the lock core 200 in sequence, and then the conductive wire 70 passes through the first through hole 310 of the lock cap 300. The lock cap 300 is tightened continuously, and the first spiral portion 460 and the second spiral portion 470 are screwed together continuously. The lock cap 300 will squeeze the clamping portion 240 of the lock core 200, so that a locking force is formed on the conductive wire 70, a tightening effect is generated, and the conductive wire 70 is clamped to perform the second-level locking. When there is no external force between the conductive wire 70 and the lock 10, there will be no relative movement, and the conductive wire 70 is prevented from falling off from the lock 10, so that the assembly of the lock 10 and the conductive wire 70 is completed. It is worth noting that during the assembly process, the tightening state only needs to make the fourth matching member 490 contact the fourth locking member 480, and there is no need to perform the buckling operation between the two.

[0094] During the operation of retrieving the filter, after the conductive wire 70 is partially implanted in the human body, the snare at the distal end of the conductive wire 70 will trap the filter's retrieval hook. The operator pushes the snare tube and the Y-shaped valve toward the distal end along the conductive wire to reduce the size of the snare at the distal end of the conductive wire 70, so that the conductive wire 70 and the filter's retrieval hook are firmly fixed. At this time, the locking cap 300 and the locking bolt 100 are screwed (spirally connected), and the fourth matching piece 490 is located on the side of the fourth locking piece 480 away from the lock core 300, and the two are not engaged. When the conductive wire 70 reaches the predetermined position, the operator can slightly loosen the locking cap 300 backwards and push the locking device 10 to move on the conductive wire 70. When the locking device 10 reaches the predetermined position, the operator continues to tighten the locking cap 300 and engages the fourth matching piece 490 with the fourth locking piece 480 to complete the third-level locking. While completely locking the conductive wire 70, it can also ensure that the position of the snare tube relative to the snare does not change. Subsequently, the locking device is pulled to keep it stationary and the retrieval sheath is pushed toward the distal end to receive the captured filter into the retrieval sheath, and finally the entire system is withdrawn from the body.

[0095] It is worth noting that the locking device 10 can use different types of conductive wires 70 to recover the filter. Depending on the specifications of the conductive wires 70 used, for example, the thickness of the conductive wires 70 is different, the positions from the second-stage locking to the third-stage locking are also different. Taking the first embodiment as an example, in the axial direction, the distance between the first locking member 410 and the second locking member 420 is increased or decreased to use conductive wires 70 of different thicknesses. In this way, the quantitative locking operation of the locking device 10 is realized, the locking state is controlled, and the influence of human operation is reduced.

[0096] The lock 10 of the present application can realize the step-by-step locking of the lock cap 300 and the locking bolt 100 in different states through the three-level locking structure 400, and can limit the lock core 200, clamp the conductive wire 70, and clamp the conductive wire 70 respectively. In this way, the three-level locking structure 400 can realize the quantitative locking of the lock 10, reduce the impact of human operation on the performance of the lock 10 clamping the conductive wire 70, and facilitate the operation of the operator. Moreover, the lock 10 locks the lock cap 300 and the locking bolt 100 through the three-level locking structure 400, so that the structure of the lock 10 is simple and easy to use.

[0097] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A locking device for locking a target component, characterized in that: include: Locking bolt; A lock core, disposed in the locking bolt; A lock cap is movably disposed on the locking bolt, and when the lock cap moves relative to the locking bolt, it can gradually clamp the lock core, so that the lock core gradually clamps the target component; The multi-stage locking structure is separately arranged on the locking bolt and the locking cap, so that the locking cap can gradually squeeze the lock core and lock the target component step by step through the lock core.

2. The locking device according to claim 1, characterized in that: The multi-stage locking structure includes a locking member and a matching member, wherein the locking member is arranged on the locking bolt, and the matching member is arranged on the lock cap. The lock cap gradually squeezes the lock core through the locking member and the matching member, so that the lock core locks the target component step by step.

3. The locking device according to claim 2, characterized in that: The locking member includes a first locking member, a second locking member and a third locking member, the first locking member, the second locking member and the third locking member are arranged at intervals along the axial direction of the locking bolt, the matching member includes a first matching member and a second matching member, the first matching member and the second matching member are arranged at intervals along the axial direction of the locking cap; When the locking cap moves relative to the locking bolt, the first mating piece cooperates with the first locking piece to complete the first level locking, the second mating piece cooperates with the second locking piece to complete the second level locking, and the first mating piece cooperates with the third locking piece to complete the third level locking.

4. The locking device according to claim 2, characterized in that: The locking member comprises a first spiral portion and a fourth locking member, the first spiral portion and the fourth locking member are spaced apart along the axial direction of the locking bolt, the matching member comprises a second spiral portion and a fourth matching member, the second spiral portion and the fourth matching member are spaced apart along the axial direction of the locking cap; When the locking cap moves relative to the locking bolt, the first spiral portion cooperates with the second spiral portion to complete the first-stage locking and the second-stage locking, and the fourth locking member cooperates with the fourth matching member to complete the third-stage locking.

5. The locking device according to claim 3, characterized in that: The locking piece and the matching piece are both boss structures.

6. The locking device according to claim 3, characterized in that: The lock cap has an annular groove, and the first matching piece and the second matching piece are respectively arranged on opposite side walls of the annular groove.

7. The locking device according to claim 3, characterized in that: The locker further comprises a sealing structure, wherein the sealing structure is arranged between the lock cap and the lock core; The sealing structure comprises a sealing column and a lock core cover, one end of the sealing column abuts against the lock cap, and the other end abuts against the lock core cover, and the lock core cover abuts against the lock core.

8. The locking device according to claim 7, characterized in that: The locking bolt further comprises a screw-on component, and the screw-on component is arranged on an inner wall of an end of the locking bolt away from the locking cap.

9. The locking device according to claim 1, characterized in that: The lock core has a guide slope, and the lock cap has a second mounting hole. When the lock cap moves toward the locking bolt, the edge of the second mounting hole gradually presses against the guide slope, so that the lock core clamps and clamps the target component.

10. The locking device according to claim 9, characterized in that: The lock core further includes a clamping portion and a supporting portion, the guiding slope is arranged on the clamping portion, and the clamping portion is used to clamp the target component.

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