Recovery device and recovery system

Abstract

The utility model relates to a recovery device and a recovery system, the recovery device comprises a capturing part, a locking piece and a handle, a holding assembly of the handle comprises a shell and a first locking part connected with the shell; an operation assembly of the handle is arranged in the containing inner cavity of the holding assembly in a penetrating mode, the operation assembly is connected with the near end of the locking piece, and the operation assembly comprises a second locking part; in the unlocking state, the operation assembly can axially move to a first axial position relative to the holding assembly so as to drive the locking piece to axially move to a second axial position relative to the capturing part; when the operation assembly is in the unlocking state and moves to the first axial position, the operation assembly can rotate in the circumferential direction relative to the holding assembly, and when the operation assembly rotates to the first rotating position in the first direction relative to the holding assembly in the circumferential direction, the first locking part and the second locking part are matched with each other; therefore, the holding assembly and the operating assembly are relatively fixed in the axial direction and are in a locked state. The handle is simple and convenient to operate, and the operation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a recycling device and a recycling system. Background Art

[0002] With the increase in the number of implantable cardiac medical devices such as pacemakers, implantable cardioverter defibrillators, and cardiac resynchronization therapy, related complications such as electrode lead fracture and electrode wear are also increasing year by year, which has led to a rapid increase in the demand for electrode lead recycling. Currently, there are two main methods for recycling electrode leads: the first is to remove the electrode leads from the body through a surgical thoracotomy, which has the disadvantages of high surgical costs and large trauma. The second is to recover the electrode leads through intravenous intervention. Under contrast conditions, the recovery device is delivered intravenously to the location of the electrode leads, and then the electrode leads to be recovered are captured and loaded by the recovery device. Finally, the electrode leads are withdrawn from the body together with the recovery device to complete the recovery of the electrode leads. This method has the advantages of low cost and less trauma, but the handle of the current recovery device is not convenient enough. Utility Model Content

[0003] Based on this, the utility model provides a recovery device and a recovery system, and the operation mode of the handles in the recovery device and the recovery system is simple and convenient.

[0004] The utility model provides a recovery device, comprising a capture portion, a locking member and a handle, wherein the handle comprises:

[0005] A grip assembly, comprising a housing and a first locking portion connected to the housing, wherein the housing comprises a proximal opening and a receiving inner cavity communicating with the proximal opening;

[0006] An operating component is inserted into the accommodating inner cavity of the holding component from the proximal opening of the holding component, the operating component is used to control the locking member, and the operating component includes an operating body and a second locking part connected to the operating body;

[0007] The holding assembly and the operating assembly have a locked state and an unlocked state. When in the unlocked state, the operating assembly can axially move to a first axial position relative to the holding assembly to drive the locking member to move axially to a second axial position relative to the capturing portion.

[0008] When in the unlocked state and the operating component moves to the first axial position, the operating component can rotate circumferentially relative to the holding component, and when the operating component rotates circumferentially in the first direction relative to the holding component to the first rotation position, the first locking portion and the second locking portion cooperate with each other to make the holding component and the operating component relatively fixed in the axial direction, in the locked state, and the locking member is axially locked relative to the capturing portion.

[0009] In one embodiment, the operating assembly is connected to the proximal end of the locking member, and when the holding assembly and the operating assembly are in a locked state, the locking member can cooperate with the capture portion to lock the target object.

[0010] In one embodiment, the first locking portion includes a proximal limit member and a distal limit member connected to the inner wall of the outer shell of the holding assembly, and a limit cavity is formed between the proximal limit member and the distal limit member. When the second locking portion is located in the limit cavity and the operating assembly is located at the first rotation position relative to the holding assembly, the second locking portion is axially restricted in the limit cavity, so that the holding assembly and the operating assembly are in a locked state.

[0011] In one embodiment, the limiting cavity includes a limiting groove, and the limiting groove includes a proximal inner wall formed by the distal surface of the proximal limiting member and a distal inner wall formed by the proximal surface of the distal limiting member. The second locking portion includes a cylindrical body and a locking arm connected to the cylindrical body, and the locking arm extends outward from the cylindrical body in a direction away from the central axis of the cylindrical body. When the second locking portion is located in the limiting cavity and the operating assembly is in the first rotation position relative to the holding assembly, the locking arm enters the limiting groove and is confined between the proximal inner wall and the distal inner wall of the limiting groove.

[0012] In one embodiment, the holding assembly further includes a stopper, which is located in the limiting cavity and connected to the inner wall of the outer shell of the holding assembly. The stopper protrudes relative to the inner wall of the outer shell of the holding assembly toward a direction close to the central axis of the holding assembly to limit the operating assembly located at the first rotation position from continuing to rotate circumferentially relative to the holding assembly toward the first direction.

[0013] In one of the embodiments, the distal limit member includes a pressing unit that is elastically retractable in the axial direction, and when the holding assembly and the operating assembly are in a locked state, the pressing unit presses the second locking portion.

[0014] In one embodiment, the pressing unit includes a shell having an inner cavity, a proximal opening located on the proximal surface of the shell, an elastic member located in the inner cavity of the shell and retractable in the axial direction, and a pressing block connected to the elastic member. The pressing block can move axially relative to the shell in the inner cavity of the shell and extend from the inner cavity of the shell to the limiting cavity through the proximal opening of the shell. When the holding assembly and the operating assembly are in a locked state, the pressing block presses the second locking portion toward the proximal end.

[0015] In one embodiment, a stop rib is further provided on the proximal end surface of the second locking portion, and a stop groove with a distal opening is further provided on the proximal limiter; or, a stop groove with a distal opening is further provided on the proximal end surface of the second locking portion, and a stop rib is further provided on the proximal limiter;

[0016] When the holding assembly and the operating assembly are in a locked state, the stopping ridge enters the stopping groove to limit the circumferential rotation of the operating assembly relative to the holding assembly toward a first direction and a second direction opposite to the first direction.

[0017] In one embodiment, the outer wall of the operating body is provided with a blocking strip extending axially, and the holding assembly also includes a first rolling member provided on the inner wall, and when the holding assembly and the operating assembly are in the unlocked state and the operating assembly is in the second rotation position relative to the holding assembly, the first rolling member presses against the blocking strip.

[0018] In one embodiment, the outer wall of the operating body is further provided with a first sliding groove extending along the circumference of the operating body and connected to the blocking strip, and the gripping assembly also includes a second rolling member arranged on the inner wall, and when the operating assembly is in the unlocked state and the operating assembly is located at the first axial position, the second rolling member cooperates with the first sliding groove to guide the operating assembly to rotate circumferentially relative to the gripping assembly; and / or, the outer wall of the operating body is further provided with a second sliding groove extending along the circumference of the operating body and connected to the blocking strip, and when the operating assembly is in the unlocked state and the operating assembly is located at the first axial position, the first rolling member cooperates with the second sliding groove to guide the operating assembly to rotate circumferentially relative to the gripping assembly.

[0019] In one embodiment, the outer wall of the operating body is further provided with a first sliding groove extending along the circumference of the operating body and connected to the blocking strip, and a first guide groove and a second guide groove connected to the first sliding groove and extending along the axial direction of the operating body. The gripping assembly also includes a second rolling member arranged on the inner wall. When in the locked state, the second rolling member is located in the first guide groove. When in the unlocked state and the operating body is in the second rotation position relative to the gripping assembly, the second rolling member is located in the second guide groove. The depths of the first guide groove and the second guide groove are both Greater than the depth of the first sliding groove; and / or, the outer wall of the operating body is also provided with a second sliding groove extending along the circumference of the operating body and connected to the blocking strip, and a third guide groove and a fourth guide groove connected to the second sliding groove and extending along the axial direction of the operating body. When in the locked state, the first rolling element is located in the third guide groove. When in the unlocked state and the operating body is in the second rotation position relative to the grip assembly, the first rolling element is located in the fourth guide groove. The depths of the third guide groove and the fourth guide groove are both greater than the depth of the second sliding groove.

[0020] In one embodiment, the first rolling member includes a receiving groove fixed on the inner wall of the outer shell of the gripping assembly, and a ball received in the receiving groove, the receiving groove has a notch, the ball extends from the notch and can rotate relative to the receiving groove, and the protruding height of the ball relative to the notch is variable; and / or, the gripping assembly also includes a second rolling member arranged on the inner wall, the second rolling member includes a receiving groove fixed on the inner wall of the outer shell of the gripping assembly, and a ball received in the receiving groove, the receiving groove has a notch, the ball extends from the notch and can rotate relative to the receiving groove, and the protruding height of the ball relative to the notch is variable.

[0021] In one embodiment, the recovery device also includes a pushing member in the shape of a hollow tube, the proximal end of the pushing member is fixedly connected to the handle, the distal end of the pushing member is fixedly connected to the proximal end of the capturing portion, the locking member is passed through the pushing member, and can move axially between an initial position and a locking position relative to the pushing member, when the locking member is in the initial position relative to the pushing member, the distal end of the locking member extends out of the distal end of the pushing member and is located between the proximal end and the distal end of the capturing portion, and there is a first distance between the distal end of the locking member and the distal end of the pushing member, and when the locking member is in the locking position relative to the pushing member, there is a second distance between the distal end of the locking member and the distal end of the pushing member, and the second distance is greater than the first distance.

[0022] A recovery system comprises the recovery device, a loader and a hemostatic valve as described above, wherein the proximal end of the loader is detachably connected to the hemostatic valve, the capture portion can be radially compressed and loaded in the loader, and can move axially relative to the loader.

[0023] In one embodiment, the recovery system also includes an outer sheath, an inner sheath, and a transition joint. The transition joint can be inserted into the proximal end of the outer sheath and communicated with the outer sheath. The inner sheath can be inserted into the transition joint and the outer sheath in sequence, and the inner sheath can move axially relative to the outer sheath and the transition joint. The loader can be inserted into the proximal end of the inner sheath and communicated with the inner sheath. The recovery device can pass through the loader and pass out from the distal ends of the outer sheath and the inner sheath, so that the capture portion is located outside the distal ends of the outer sheath and the inner sheath, and the capture portion can be radially compressed in the inner sheath.

[0024] In one embodiment, the outer sheath is a bending-adjustable sheath, the outer sheath includes a first sheath body and a first reinforcement segment arranged at the distal end of the first sheath body, the hardness of the first reinforcement segment is higher than the hardness of the first sheath body; and / or, the inner sheath includes a second sheath body and a second reinforcement segment arranged at the distal end of the second sheath body, the hardness of the second reinforcement segment is higher than the hardness of the second sheath body, and a bendable segment is further provided between the second sheath body and the second reinforcement segment, the bending stiffness of the bendable segment is lower than the bending stiffness of the second sheath body.

[0025] The operator can realize the movement of the locking member relative to the capture part and the position locking of the locking member by controlling the axial movement and circumferential rotation of the operating assembly relative to the gripping assembly, and the operation method is simple and convenient, which is conducive to improving the efficiency of the operation. When the gripping assembly and the operating assembly are in a locked state, the locking member can cooperate with the capture part to lock the target object, and at this time, the relative position of the locking member and the capture part is locked, so that the capture part and the locking member can always keep the target object locked, which can effectively reduce the risk of displacement of the locking member caused by the operator's accidental touch, thereby reducing the probability of the target object falling out in subsequent operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a recycling system in one embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of a handle in one embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the operating assembly of the handle in one embodiment of the utility model;

[0029] Figure 4An exploded view of a handle in one embodiment of the utility model;

[0030] Figure 5 This is a partial structural diagram of a handle in one embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the partial structure of the handle in one embodiment of the utility model (the operating assembly is in the first axial position at this time);

[0032] Figure 7 This is a schematic diagram of the partial structure of the handle in one embodiment of the utility model (the operating component is in the first rotation position at this time);

[0033] Figure 8 This is a partial structural diagram of a handle in one embodiment of the utility model;

[0034] Fig. 9 This is a partial structural diagram of a handle in one embodiment of the utility model;

[0035] Fig.10 This is a three-dimensional structural schematic diagram of the operating assembly of the handle in one embodiment of the utility model from another angle;

[0036] Fig.11 It is a schematic diagram of the capture part in a first state in one embodiment of the utility model;

[0037] Fig.12 It is a schematic diagram of the capture part in the second state in one embodiment of the utility model;

[0038] Fig.13 It is a schematic diagram of the capture portion in the second state in one embodiment of the utility model (the locking member is not shown);

[0039] Fig.14 for Fig.11 Schematic diagram of the matching relationship between the capture member, transition member and push member (with the first sleeve and the second sleeve removed);

[0040] Fig.15 It is a schematic diagram of the matching relationship between the transition piece, the locking piece and the pushing piece in one embodiment of the utility model;

[0041] Fig.16 It is a schematic cross-sectional structure diagram of the cooperation between the transition piece and the pushing piece in one embodiment of the utility model;

[0042] Fig.17 It is a schematic diagram of the cross-sectional structure of a transition piece in one embodiment of the utility model;

[0043] Fig.18 for Fig.14 A schematic diagram of the structure after adding the first sleeve (the second sleeve is not shown);

[0044] Fig.19 This is a schematic diagram of the three-dimensional structure of the capture part in one embodiment of the utility model;

[0045] Fig. 20 It is a three-dimensional structural schematic diagram of another angle of the capture part in one embodiment of the utility model;

[0046] Fig.21 It is a schematic diagram of the capture portion and the locking member cooperating to lock a target object in one embodiment of the utility model. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model 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 utility model. However, the utility model 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 utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0048] In the description of the present invention, it should be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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 the present invention can be understood according to specific circumstances.

[0051] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a 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.

[0052] It should be noted that when 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. When 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. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0053] It should be noted that in the field of interventional medical devices, the end of a medical device implanted in a human or animal body that is closer to the operator is generally called the "proximal end", and the end that is farther from the operator is called the "distal end", and the "proximal end" and "distal end" of any component of a medical device are defined based on this principle. "Axial" generally refers to the length direction of a medical device when it is transported, and "radial" generally refers to the direction of a medical device that is perpendicular to its "axial direction", and the "axial" and "radial" of any component of a medical device are defined based on this principle.

[0054] Please refer to Figure 1 This embodiment provides a recovery device 300, which can be used to remove a slender target object from a living body, such as a guide wire, a guide wire, etc. For ease of understanding, this embodiment is described by taking a guide wire of a cardiac implantable medical device as an example of the target object.

[0055] The recovery device 300 of this embodiment includes a capture portion 70 , a handle 80 and a locking member 801 .

[0056] The capture portion 70 is used to capture the target object in the body. The capture portion 70 has radial expansion capability, can realize radial contraction under the action of external force, and can self-expand or mechanically expand to restore to a natural expanded shape (also called a fully expanded shape, a state without radial compression) after the external force is removed and maintain the natural expanded shape.

[0057] The locking member 801 can cooperate with the capture portion 70 to lock the target object. The proximal end of the locking member 801 is connected to the handle 80, and the locking member 801 can be moved axially relative to the capture portion 70 by the control of the handle 80.

[0058] Reference Figures 2 to 5 In this embodiment, the handle 80 includes a gripping component 81 and an operating component 82.

[0059] The holding assembly 81 includes a shell 83 and a first locking portion 84 connected to the shell 83 , and the shell 83 includes a proximal opening and a receiving inner cavity connected to the proximal opening.

[0060] The operating component 82 is inserted into the accommodating inner cavity of the holding component 81 from the proximal opening of the holding component 81. The operating component 82 is connected to the proximal end of the locking member 801, and can drive the locking member 801 to move relative to the capturing portion 70. The operating component 82 includes an operating body 85 and a second locking portion 86 connected to the operating body 85. In this embodiment, the second locking portion 86 is fixedly connected to the distal end of the operating body 85, and the distal end of the second locking portion 86 is fixedly connected to the proximal end of the locking member 801. In other embodiments, the locking member 801 can be connected to any position of the operating component 82, as long as the operating component 82 can drive the locking member 801 to move. In addition, the second locking portion 86 is not limited to being set at the distal end of the operating body 85, and the second locking portion 86 can be set at other positions of the operating body 85.

[0061] The gripping assembly 81 and the operating assembly 82 have a locked state and an unlocked state. When in the unlocked state, the operating assembly 82 can move axially relative to the gripping assembly 81 to a first axial position (refer to Figure 6 The first locking portion 84 and the second locking portion 86 cooperate with each other to fix the gripping component 81 and the operating component 82 in the axial direction relative to the gripping component 81, and the first locking portion 84 and the second locking portion 86 cooperate with each other to fix the gripping component 81 and the operating component 82 in the axial direction relative to the gripping component 81, and the locking component 801 is in the unlocked state and the operating component 82 is moved to the first axial position. Figure 7 ), and the locking member 801 is locked axially relative to the capturing portion 70.

[0062] In the handle 80 of this embodiment, the operator can realize the movement of the locking member 801 relative to the capture portion 70 and the position locking of the locking member 801 by controlling the axial movement and circumferential rotation of the operating component 82 relative to the gripping component 81. The operation method is simple and convenient, which is conducive to improving the efficiency of the operation. When the gripping component 81 and the operating component 82 are in a locked state, the locking member 801 can cooperate with the capture portion 70 to lock the target object, and at this time, the relative position of the locking member 801 and the capture portion 70 is locked, so that the capture portion 70 and the locking member 801 can always keep the target object locked, which can effectively reduce the risk of displacement of the locking member 801 caused by the operator's accidental touch, thereby reducing the probability of the target object falling out in subsequent operations.

[0063] Reference Figure 4 , Figure 5 In this embodiment, the gripping assembly 81 may be a hollow cylindrical structure, which includes a first shell 83a and a second shell 83b. The first shell 83a and the second shell 83b are joined together to form the shell 83 of the gripping assembly 81, and the first shell 83a and the second shell 83b are enclosed inside to form a containing inner cavity. The containing inner cavity includes a limiting cavity 831 and a sliding cavity 832 that are interconnected, wherein the sliding cavity 832 is used to provide a moving space for the operating assembly 82, for example, the operating body 85 and the second locking portion 86 can slide axially in the sliding cavity 832, and can enter the limiting cavity 831 from the sliding cavity 832, and can also exit from the limiting cavity 831 and enter the sliding cavity 832. The limiting cavity 831 is used to limit the second locking portion 86 when the gripping assembly 81 and the operating assembly 82 are in a locked state.

[0064] In this embodiment, the first locking portion 84 includes a proximal stopper 841 and a distal stopper 842 connected to the inner wall of the housing 83 of the gripping assembly 81, and a stopper cavity 831 is formed between the proximal stopper 841 and the distal stopper 842. The second locking portion 86 can slide from the sliding cavity 832 into the stopper cavity 831 along with the operating body 85. When the second locking portion 86 is located in the stopper cavity 831 and the operating assembly 82 is located at the first rotation position relative to the gripping assembly 81 (refer to Figure 7 ), the second locking portion 86 is axially restricted in the limiting cavity 831. The limiting cavity 831 cooperates with the second locking portion 86, so that the locking structure is located in the accommodating inner cavity of the gripping assembly 81, which can further reduce the risk of accidental touch by the operator and improve the stability of the locking function. In other embodiments, the gripping assembly 81 and the operating assembly 82 can also be removably locked by mutual engagement, threaded connection, etc.

[0065] In this embodiment, the limiting cavity 831 includes a limiting groove 8311, and the limiting groove 8311 includes a proximal inner wall formed by the distal end surface of the proximal limiting member 841 and a distal inner wall formed by the proximal end surface of the distal limiting member 842. Figure 3 The second locking portion 86 includes a cylindrical body 861 and a locking arm 862 connected to the cylindrical body 861, and the locking arm 862 extends from the cylindrical body 861 in a direction away from the central axis of the cylindrical body 861, for example, Figure 3 The locking arm 862 in the embodiment extends outward from the outer wall of the cylindrical body 861 along the radial direction of the cylindrical body 861, and is approximately perpendicular to the central axis of the cylindrical body 861. It can be understood that the angle between the central axis of the locking arm 862 and the central axis of the cylindrical body 861 is 90°±5°. In other embodiments, the angle between the locking arm 862 and the central axis of the cylindrical body 861 may be different from that of this embodiment, and can be selected according to actual needs. The number of the locking arms 862 can be one or more, for example, Figure 3 The number of locking arms 862 in the embodiment is two, and they are symmetrically arranged on both sides of the radial direction of the columnar body 861. In other embodiments, the number of locking arms 862 can be set according to actual needs, and when there are multiple locking arms 862, their arrangement positions can be different from that in this embodiment. For example, the locking arms 862 can be arranged asymmetrically in the radial direction of the columnar body 861, or multiple locking arms 862 can also be arranged along the axial direction of the columnar body 861.

[0066] Reference Figure 5 , Figure 7 In this embodiment, the limiting groove 8311 is located at the radial end of the limiting cavity 831. When the second locking portion 86 is located in the limiting cavity 831 and the operating component 82 is located at the first rotation position relative to the holding component 81 (refer to Figure 7 ), the locking arm 862 enters the limiting groove 8311 and is restricted between the proximal inner wall and the distal inner wall of the limiting groove 8311, thereby realizing mutual locking between the gripping assembly 81 and the operating assembly 82. When the locking arm 862 is located in the limiting groove 8311, the operator controls the operating assembly 82 to rotate circumferentially relative to the gripping assembly 81 in a second direction opposite to the first direction to a second rotation position, the gripping assembly 81 and the operating assembly 82 are unlocked (refer to Figure 6 ), in the unlocked state, the operating component 82 can move axially relative to the holding component 81.

[0067] In this embodiment, stable locking between the holding component 81 and the operating component 82 can be achieved through the cooperation of the locking arm 862 and the limiting groove 8311. In particular, when the two locking arms 862 are symmetrically arranged on both radial sides of the cylindrical body 861, it is beneficial to further improve the locking stability, and unlocking can be achieved through a simple rotation operation, further improving the convenience of operation.

[0068] Reference Figure 4 , Figure 5 , Figure 7 In this embodiment, one of the locking arms 862 is recorded as the first locking arm, and the other locking arm 862 is recorded as the second locking arm. The gripping assembly 81 includes two first locking portions 84, which are respectively connected to the inner wall of the first shell 83a and the inner wall of the second shell 83b. Each first locking portion 84 includes a distal stopper 842 and two proximal stoppers 841, and the two proximal stoppers 841 are symmetrically arranged on the inner wall of the housing 8422 of the gripping assembly 81 along the radial direction of the gripping assembly 81. A stopper groove 8311 is formed between each proximal stopper 841 and the distal stopper 842, so that two stopper grooves 8311 can be formed in each first locking portion 84, and the two stopper grooves 8311 are arranged opposite to each other along the radial direction of the gripping assembly 81. The two limiting grooves 8311 in the first housing 83a are respectively recorded as the first limiting groove and the second limiting groove, the first limiting groove is located on the opposite side of the second limiting groove, and the two limiting grooves 8311 in the second housing 83b are respectively recorded as the third limiting groove and the fourth limiting groove, the third limiting groove is located on the opposite side of the fourth limiting groove, and the first limiting groove and the third limiting groove are located on the same side, and the second limiting groove and the fourth limiting groove are located on the same side. When the second locking portion 86 is located in the limiting cavity 831, and the operating component 82 is located at the first rotation position relative to the gripping component 81, a part of the first locking arm is located in the first limiting groove, and a part is located in the third limiting groove, and a part of the second locking arm is located in the second limiting groove, and a part is located in the fourth limiting groove. Such a setting is conducive to further improving the stability of the locking between the gripping component 81 and the operating component 82. It can be understood that in other embodiments, the number of the first locking portion 84 can be one or more than two, which can be set according to actual needs.

[0069] Reference Figure 5 , Figure 8In this embodiment, the holding assembly 81 also includes one or more stop members 843, which are located in the limiting cavity 831 and connected to the inner wall of the outer shell 83 of the holding assembly 81. The stop member 843 protrudes relative to the inner wall of the outer shell 83 of the holding assembly 81 toward the direction close to the central axis of the holding assembly 81 to limit the operating assembly 82 located at the first rotation position from continuing to rotate circumferentially relative to the holding assembly 81 toward the first direction. Exemplarily, the stop member 843 includes one or more stop plates 8431, which are triangular in shape. The base of the triangular stop plate 8431 is connected to the inner wall of the outer shell 83 of the holding assembly 81 (for example, fixedly connected), and the vertex of the triangular stop plate 8431 is closer to the central axis of the holding assembly 81 relative to the base of the triangle. An edge connected to the triangular stop plate 8431 and its vertex is a stop edge. When the operating assembly 82 is rotated to a first rotation position relative to the holding assembly 81, the stop edge and the locking arm 862 abut against each other to limit the operating assembly 82 from continuing to rotate circumferentially relative to the holding assembly 81 in the first direction. In this embodiment, the stopper 843 includes two stopper pieces 8431 arranged at intervals along the axial direction of the gripping assembly 81. This arrangement can not only achieve a better limiting effect, but also reduce the weight of the stopper 843. In particular, when the gripping assembly 81 is injection molded by a polymer material, the stopper 843 is not likely to deform too much during the molding process, and the molding effect is good. The gripping assembly 81 may include two stopper pieces 843, which are respectively arranged on the first shell 83a and the second shell 83b (refer to Figure 4 ), and the two stoppers 843 are used to limit the circumferential position of the first locking arm and the second locking arm respectively, and such a setting is conducive to uniform circumferential limiting. In other embodiments, the number of stoppers 843 and the number and shape of stopper pieces 8431 in the stoppers 843 may be different from those in this embodiment, as long as they can protrude relative to the inner wall of the housing 83 of the gripping assembly 81 toward the direction close to the central axis of the gripping assembly 81, and play a role in limiting the operating assembly 82 in the first rotation position from continuing to rotate circumferentially relative to the gripping assembly 81 toward the first direction.

[0070] Reference Figure 4 , Figure 5 , Fig. 9 The distal limit member 842 includes a pressing unit 8421 that can elastically expand and contract in the axial direction. When the holding component 81 and the operating component 82 are in a locked state, the pressing unit 8421 presses the second locking portion 86, so that the second locking portion 86 can be more firmly locked relative to the first locking portion 84, and the operating component 82 and the holding component 81 can be more firmly axially locked, and are not easily unlocked due to accidental touch by the operator.

[0071] Exemplarily, the pressing unit 8421 includes a housing 8422 having an inner cavity, a proximal opening located at the proximal surface of the housing 8422, an elastic member 8423 (e.g., a spring, an elastic wire, etc.) located in the inner cavity of the housing 8422 and axially retractable, and a pressing block 8424 connected to the elastic member 8423, wherein the pressing block 8424 can axially move relative to the housing 8422 in the inner cavity of the housing 8422, and extend from the inner cavity of the housing 8422 through the proximal opening of the housing 8422 to the limiting cavity 831. When the pressing block 8424 is not in contact with the second locking portion 86, the elastic member 8423 is in a natural state without being compressed or stretched, and the pressing block 8424 extends from the proximal opening of the housing 8422 to the limiting cavity 831. In this embodiment, the second locking portion 86 is located at the distal end of the operating assembly 82. When in the unlocked state, and the second locking portion 86 moves into the limiting cavity 831 and contacts the pressing block 8424, if the operator continues to push the operating assembly 82 toward the distal end relative to the holding assembly 81, the elastic member 8423 will be compressed to produce elastic feedback, so that the operator can feel the pushing resistance, thereby prompting the operator to push the axial push into place and perform the locking operation. When the holding assembly 81 and the operating assembly 82 are in the locked state, the pressing block 8424 presses the second locking portion 86 toward the proximal end, and the operating assembly 82 and the holding assembly 81 can maintain the axial lock more firmly, and it is not easy to be unlocked due to the operator's accidental touch. In this embodiment, the gripping assembly 81 includes two first locking portions 84, which are respectively arranged on the first shell 83a and the second shell 83b, and are symmetrically spaced in the radial direction of the gripping assembly 81. Each first locking portion 84 is provided with a pressing unit 8421, that is, there are two pressing units 8421 in the gripping assembly 81, and the two pressing units 8421 are also symmetrically spaced in the radial direction of the gripping assembly 81. Therefore, the pressing blocks 8424 of the two pressing units 8421 are symmetrically spaced in the radial direction. When the gripping assembly 81 and the operating assembly 82 are in a locked state, the two pressing blocks 8424 can press the second locking portion 86 uniformly in the radial direction of the second locking portion 86, so that the second locking portion 86 is uniformly stressed. In addition, a passage for the locking member 801 to pass through is provided between the two first locking portions 84 spaced apart, which does not affect the axial movement of the locking member 801 operating assembly 82 relative to the gripping assembly 81. It can be understood that in other embodiments, the number of the pressing units 8421 can be one or more than two, which can be set according to actual needs.

[0072] Reference Figure 8 , Fig.10In this embodiment, a stop rib 8621 may be further provided on the proximal end surface of the second locking portion 86, and a stop groove 8411 with a distal opening is provided on the proximal stop member 841. When the grip assembly 81 and the operating assembly 82 are in a locked state, the stop rib 8621 enters the stop groove 8411 to limit the circumferential rotation of the operating assembly 82 relative to the grip assembly 81 in a first direction and a second direction opposite to the first direction. Such a configuration is conducive to further preventing the operator from accidentally unlocking the assembly. Figure 8 The stop groove 8411 has two side walls spaced apart along the circumference of the gripping assembly 81. Therefore, when the stop rib 8621 enters the stop groove 8411, it can limit the circumferential rotation of the operating assembly 82 relative to the gripping assembly 81 in the second direction and can also limit the circumferential rotation in the first direction. In other embodiments, the stop groove 8411 can be provided on the proximal end surface of the second locking portion 86, and the stop rib 8621 can be provided on the distal end surface of the proximal stopper 841.

[0073] Reference Figure 3 , Figure 4 , Figure 8The outer wall of the operating body 85 is provided with a blocking strip 851 extending in the axial direction, and the gripping assembly 81 further includes a first rolling member 844 provided on the inner wall. When the gripping assembly 81 and the operating assembly 82 are in an unlocked state, and the operating assembly 82 is in a second rotation position relative to the gripping assembly 81, the first rolling member 844 presses against the blocking strip 851. Exemplarily, the blocking strip 851 includes a plurality of short grooves spaced apart along the axial direction of the operating body 85, and the first rolling member 844 includes a receiving groove fixed on the inner wall of the housing 83 of the gripping assembly 81, and a ball received in the receiving groove. The receiving groove has a notch, and the ball extends from the notch and can rotate relative to the receiving groove. A spring (not shown) is provided between the ball and the receiving groove. When the ball is pressed, the ball can move toward the direction of the receiving groove, so that the protruding height of the ball relative to the notch is reduced. When the pressure is removed, the ball can restore the protruding height relative to the notch. When the grip assembly 81 and the operating assembly 82 are in an unlocked state and the operating assembly 82 is in the second rotation position relative to the grip assembly 81, the operating assembly 82 can move axially relative to the grip assembly 81. During this movement, the first rolling member 844 pressed against the blocking bar 851 can make the operator feel a sense of resistance during the pushing process, thereby helping to improve the operating feel and accuracy. In addition, since the protruding height of the ball relative to the notch is variable, during the axial movement of the operating assembly 82 relative to the grip assembly 81, it rolls with the blocking bar 851 and can make a sound, thereby providing the operator with voice feedback. In this embodiment, the operating body 85 is roughly cylindrical, and two blocking bars 851 are arranged on the operating body 85. The two blocking bars 851 are symmetrically arranged on the outer wall of the operating body 85 along the radial direction. The first outer shell 83a and the second outer shell 83b are respectively provided with first rolling members 844. The first rolling member 844 is located in the sliding cavity 832 and is arranged close to the proximal end of the gripping assembly 81. Since the first rolling member 844 protrudes from the inner wall of the outer shell of the gripping assembly 81, when the operating assembly 82 is in the second rotation position and slides in the sliding cavity 832, the first rolling member 844 can also cooperate with the locking arm 862 to limit the operating assembly 82 from continuing to slide toward the proximal end relative to the gripping assembly 81. In other embodiments, only one blocking bar 851 and a matching first rolling member 844 can be provided, or the number of the blocking bar 851 and the first rolling member 844 can be more than two. In addition, the number and position of the first rolling member 844 and the blocking bar 851 can be set according to actual needs.

[0074] Reference Figure 3 , Fig. 9The outer wall of the operating body 85 is also provided with a first sliding groove 852 extending along the circumference of the operating body 85 and communicating with the blocking strip 851. The gripping assembly 81 also includes a second rolling member 845 provided on the inner wall. The specific structure of the second rolling member 845 can refer to the first rolling member 844. When the operating assembly 82 is in the unlocked state and is located at the first axial position, the second rolling member 845 cooperates with the first sliding groove 852 to guide the operating assembly 82 to rotate circumferentially relative to the gripping assembly 81. The outer wall of the operating body 85 is also provided with a second sliding groove 853 extending along the circumference of the operating body 85 and communicating with the blocking strip 851. When the operating assembly 82 is in the unlocked state and is located at the first axial position, the first rolling member 844 cooperates with the second sliding groove 853 to guide the operating assembly 82 to rotate circumferentially relative to the gripping assembly 81. It can be understood that in other embodiments, the first sliding groove 852 and the second rolling member 845 can be omitted, or the second sliding groove 853 can be omitted. The cooperation between the sliding groove and the rolling element facilitates the stable and smooth relative rotation of the operating component 82 relative to the holding component 81, thereby improving the operating performance.

[0075] In this embodiment, a guide groove may be further provided on the operating body 85. Exemplarily, the outer wall of the operating body 85 is further provided with a first guide groove 8541 and a second guide groove 8542 which are connected with the first sliding groove 852 and extend along the axial direction of the operating body 85. When in a locked state, the operating body 85 is located at a first rotation position relative to the grip assembly 81, and the second rolling element 845 is located in the first guide groove 8541. When in an unlocked state, and the operating body 85 is located at a second rotation position relative to the grip assembly 81, the second rolling element 845 is located in the second guide groove 8542. The depths of the first guide groove 8541 and the second guide groove 8542 are both greater than the depth of the first sliding groove 852. Both the first guide groove 8541 and the second guide groove 8542 have a guiding function, and because they have a greater depth, when the second rolling element 845 enters the first sliding groove 852, the second rolling element 845 can generate sound feedback. The outer wall of the operating body 85 is also provided with a third guide groove 8543 and a fourth guide groove 8544 which are connected with the second sliding groove 853 and extend along the axial direction of the operating body 85. When in the locked state, the first rolling member 844 is located in the third guide groove 8543. When in the unlocked state, and the operating body 85 is located at the second rotation position relative to the grip assembly 81, the first rolling member 844 is located in the fourth guide groove 8544. The depths of the third guide groove 8543 and the fourth guide groove 8544 are greater than the depth of the second sliding groove 853. The third guide groove 8543 and the fourth guide groove 8544 both have a guiding function, and because they have a large depth, when the first rolling member 844 enters therein from the second sliding groove 853, the first rolling member 844 can generate sound feedback. It can be understood that in other embodiments, one or more of the first guide groove 8541, the second guide groove 8542, the third guide groove 8543, and the fourth guide groove 8544 can be omitted.

[0076] Reference Figure 2 , Figure 3 In this embodiment, the operating assembly 82 may further include an operating handle 87 disposed at the proximal end of the operating body 85. The operating handle 87 is located outside the accommodating inner cavity of the grip assembly 81. The maximum outer diameter of the operating handle 87 is greater than the maximum outer diameter of the operating body 85, so as to facilitate the operator to hold and manipulate. The outer wall of the operating handle 87 and / or the grip assembly 81 may be provided with a mark 871 to prompt the operator to lock the rotation direction, the locked state, and the unlocked state. In other embodiments, the mark 871 may be omitted.

[0077] Reference Figure 1The recovery device also includes a pushing member 802, which is a hollow tubular structure. The proximal end of the pushing member 802 is fixedly connected to the handle 80, and the distal end of the pushing member 802 is fixedly connected to the proximal end of the capturing portion 70. The locking member 801 is penetrated in the pushing member 802 and can move axially between an initial position and a locking position relative to the pushing member 802. When the locking member 801 is in the initial position relative to the pushing member 802, the distal end of the locking member 801 extends out of the distal end of the pushing member 802 and is located between the proximal end and the distal end of the capturing portion 70, and there is a first distance between the distal end of the locking member 801 and the distal end of the pushing member 802. When the locking member 801 is in the locking position relative to the pushing member 802, there is a second distance between the distal end of the locking member 801 and the distal end of the pushing member 802, and the second distance is greater than the first distance. Such a configuration can improve the success rate of the locking member 801 and the capture portion 70 in locking the target object, and can reduce the travel of the locking member 801 to move to the locking position, thereby improving the efficiency of locking the target object.

[0078] Please also refer to Fig.11 The capture portion 70 includes a first capture member 71 and a second capture member 72. The distal ends of the first capture member 71 and the second capture member 72 are both free ends, so the distal ends of the first capture member 71 and the second capture member 72 can move relative to each other.

[0079] The first catching member 71 and the second catching member 72 have a first state and a second state which are switchable with each other. Fig.11 What is shown is the unfolded state of the first catch member 71 and the second catch member 72 (i.e., the first state of this embodiment). The first catch member 71 and the second catch member 72 have at least one distal section, which is an axial region of the catch portion 70, and the axial region is closer to the distal end of the catch portion 70 than the proximal end of the first catch member 71 and the proximal end of the second catch member 72. In the first state, the distal sections of the first catch member 71 and the second catch member 72 are spaced apart in the radial direction and separated from each other. For example, the catch portion 70 has at least one axial plane (i.e., a plane parallel to the central axis, and the present invention uses the virtual central axis of the push member 802 as the central axis of the catch portion 70), and in the distal section, the first catch member 71 and the second catch member 72 are arranged on both sides of the radial direction of the axial plane.

[0080] In this embodiment, the first catch member 71 and the second catch member 72 both have an inner side surface located inside and an outer side surface located outside. Fig.11It can be seen that when in the first state, the distal end of the first capture member 71 is located inside the second capture member 72. Similarly, the distal end of the second capture member 72 is located inside the first capture member 71. In this embodiment, the side where the first capture member 71 and the second capture member 72 face each other in the first state is defined as the inner side, and the side where the first capture member 71 and the second capture member 72 are separated in the first state is defined as the outer side. A capture space 70a with a distal opening is formed between the first capture member 71 and the second capture member 72. The capture space 70a is used to accommodate a target object. The target object can enter the capture space 70a from the distal opening of the capture space 70a. In order to make it easier for the target object to enter the capture space 70a from the distal opening in the first state, the radial distance between the distal end of the first capture member 71 and the distal end of the second capture member 72 in this embodiment is greater than the radial distance between the proximal end of the first capture member 71 and the proximal end of the second capture member 72. The radial distance between two objects in the utility model refers to the projection length of the line connecting the two objects on the radial plane (ie, the plane perpendicular to the axial direction).

[0081] Reference Fig.12 , Fig.13 When in the second state, the distal sections of the first catch member 71 and the second catch member 72 are radially close to each other and cross-arranged. It can be understood that the cross here refers to the cross and stagger in space, and does not mean that there must be a contact intersection between the first catch member 71 and the second catch member 72.

[0082] Reference Fig.11 The first catch member 71 and the second catch member 72 both have an annular structure, wherein the annular structure of the first catch member 71 has a first through hole 73, and the annular structure of the second catch member 72 has a second through hole 74. Fig.12 , Fig.13When in the second state, at least a portion of the first catch member 71 passes through the second through hole 74 from the inner side of the second catch member 72 and passes through the outer side of the second catch member 72, so that a portion of the first catch member 71 (for example, the distal end of the first catch member 71) is located outside the second catch member 72 to form a first overhanging section 71a, and another portion is located inside the second catch member 72. At least a portion of the second catch member 72 is sleeved outside the first catch member 71, so that a portion of the second catch member 72 (for example, the distal end of the second catch member 72) is located outside the first catch member 71 to form a second overhanging section 72a, and another portion is located inside the first catch member 71. The first through hole 73 and the second through hole 74 intersect and have a common area, and the first overhanging section 71a and the second overhanging section 72a enclose and form an axial third through hole 75 at one side of the distal end of the common area, and the locking member 801 can move from the proximal end to the distal end of the catch portion 70 and pass through the third through hole 75. It can be understood that in other embodiments, the first catch member 71 does not necessarily have an annular structure, as long as it can form an interlaced configuration in the second state, so that a catch space 70a with a limiting function at the distal end is formed between the first catch member 71 and the second catch member 72.

[0083] Please refer again Fig.11 In the first state, the first catch member 71 and the second catch member 72 are both curved structures that are concave in the direction away from the central axis of the catch portion 70 (the virtual central axis of the push member 802 is used as the central axis of the catch portion 70 in the present invention), that is, they are curved structures that are concave in the outward direction. This arrangement makes it easier for the first catch member 71 and the second catch member 72 to approach each other in the radial direction to form a cross shape.

[0084] In the first state, the annular structure of the first catch member 71 and the annular structure of the second catch member 72 are arranged opposite to each other in the radial direction, the openings of the first through hole 73 and the second through hole 74 are opposite to each other in the radial direction (i.e., facing each other), and the first through hole 73 and the second through hole 74 are at least partially located in the distal section. The annular structure is formed by the wire extending from the proximal end to the distal end, bending and then extending to the proximal end, forming a structure with a closed distal end, and the proximal end can be closed or open. In other embodiments, only one of the first catch member 71 or the second catch member 72 needs to have an annular structure.

[0085] Reference Fig.11, illustratively, the first capture member 71 and the second capture member 72 each include two segments of capture wire 711. In the first state and in the same capture member, from the proximal end to the distal end, the two segments of capture wire 711 extend in a direction away from each other and then bend to extend in a direction close to each other, and intersect and connect at the distal end to form a petal-shaped or teardrop-shaped ring structure. In other embodiments, it can be any other suitable shape such as an ellipse, a circle, a diamond, a triangle, etc. The capture wire 711 is made of a solid or hollow wire, which can be made of a shape memory metal material (such as nickel titanium alloy, nickel titanium tantalum alloy, etc.) and / or a shape memory polymer material, and can be a wire made of a single wire or a wire wound with multiple wires. In other embodiments, the wire can be made of, for example, stainless steel or other elastic materials. The two segments of capture wire 711 are integrally formed. In other embodiments, the two segments of capture wire 711 can be made separately and then spliced ​​together.

[0086] The annular structures formed by the two sections of the catching wire 711 in the first catching member 71 and the second catching member 72 can be the same or different. For example, when in the first state, the two sections of the catching wire 711 are arranged roughly in an inverted V shape at the distal end of the first catching member 71, and the two sections of the catching wire 711 are arranged roughly in an inverted U shape at the distal end of the second catching member 72, so that the distal end of the first catching member 71 is easier to insert into the second catching member 72; or, the two sections of the catching wire 711 are arranged roughly in an inverted U shape at the distal end of the first catching member 71, and the two sections of the catching wire 711 are arranged roughly in an inverted V shape at the distal end of the second catching member 72; or, the two sections of the catching wire 711 are arranged roughly in an inverted V shape or inverted U shape at the distal ends of the first catching member 71 and the second catching member 72.

[0087] The bending stiffness of the capture wire 711 in the same capture element along the axial direction may be the same or different. For example, the capture wire 711 may be divided into a proximal section and a distal section in the axial direction. The bending stiffness of the proximal section is greater than that of the distal section. Since the distal section is more easily deformed, it is easier to cooperate with the locking element 801 to lock the target object. In other embodiments, the bending stiffness of the proximal section is less than that of the distal section, which can reduce the sheathing force of the capture part 70 to a certain extent.

[0088] In this embodiment, the proximal ends of the two sections of the capturing wire 711 in the same capturing member are both fixedly connected to the pushing member 802 as the proximal ends of the capturing member. In other embodiments, the distal ends of the two sections of the capturing wire 711 intersect and connect, wherein the proximal end of the first section of the capturing wire 711 is directly fixedly connected to the pushing member 802 as the proximal end of the capturing member, and the proximal end of the second section of the capturing wire 711 is fixedly connected to the first section of the capturing wire 711 without continuing to extend toward the proximal end. In other embodiments, the proximal and distal ends of the two sections of the capturing wire 711 are both intersected and connected to form an annular structure, and the proximal ends of the two sections of the capturing wire 711 are connected to the pushing member 802 through other capturing wires 711. This arrangement is conducive to reducing the radial compression size of the proximal end of the capturing portion 70, making it easier to sheath the capturing portion 70.

[0089] In this embodiment, in the first state, the distal end of the first catch member 71 is axially closer to the proximal end of the recovery device 300 than the distal end of the second through hole 74. This arrangement makes it easier for the first catch member 71 to pass through the second catch member 72 to form the second state.

[0090] Furthermore, in the first state, with reference to any cross section perpendicular to the axial direction and cutting the first catch member 71, the second catch member 72 and the second through hole 74 at the same time, the width of the first catch member 71 in the cross section is smaller than the width of the second through hole 74 in the cross section. In other embodiments, only in the distal section, with reference to any cross section perpendicular to the axial direction and cutting the first catch member 71, the second catch member 72 and the second through hole 74 at the same time, the width of the first catch member 71 in the cross section is smaller than the width of the second through hole 74 in the cross section. This arrangement enables the second catch member 72 to provide a larger space inside the ring, so that the first catch member 71 can pass through the ring of the second catch member 72, and in the second state, a larger third through hole 75 can be formed.

[0091] Reference Figure 14 to Figure 17 The capture portion 70 of this embodiment further includes a transition piece 90, a first sleeve 901 and a second sleeve 902 ( Fig.11 ). The first catch member 71 and the second catch member 72 both include two sections of catch wire 711, and the first catch member 71 also includes two sections of fixing wire 712, and the two sections of fixing wire 712 of the first catch member 71 are respectively connected to the two sections of catch wire 711 of the first catch member 71. The second catch member 72 also includes two sections of fixing wire 712, and the two sections of fixing wire 712 of the second catch member 72 are respectively connected to the two sections of catch wire 711 of the second catch member 72.

[0092] The transition piece 90 includes a first fixing body 91 and a second fixing body 92 from the proximal end to the distal end. The first fixing body 91 is fixedly connected to the distal end of the push piece 802, and the second fixing body 92 is fixedly connected to the proximal end of the catch piece. By adding the transition piece 90, the first catch piece 71 and the second catch piece 72 and the push piece 802 are respectively fixed at different positions of the transition piece 90, which can reduce the damage to the distal end of the push piece 802 during the manufacturing process, which is conducive to improving the connection strength between the catch piece and the push piece 802.

[0093] The radial dimension of the first fixed body 91 is greater than the radial dimension of the second fixed body 92, and a certain space is reserved around the second fixed body 92 for the proximal end of the catch member to connect with the outer surface of the second fixed body 92. The first fixed body 91 includes a first fixed portion 912 and a second fixed portion 913 from the proximal end to the distal end. The first fixed portion 912 includes a first sub-cavity 914, and the second fixed portion 913 includes a second sub-cavity 915. The caliber (also called diameter, radial dimension) of the first sub-cavity 914 is greater than the caliber of the second sub-cavity 915. The distal end of the push member 802 is inserted into the first sub-cavity 914 and fixed to the transition member 90. In this embodiment, the transition member 90 is fixedly connected to the distal end of the push member 802 by welding, bonding, clamping, etc. In other embodiments, the transition member 90 can be integrally formed with the push member 802. The second sub-cavity 915 is connected to the inner cavity of the push member 802. From the distal end to the proximal end, the outer diameter of the first fixed portion 912 gradually decreases, and this arrangement is conducive to sheathing. The second fixed body 92 includes a third sub-cavity 916, and the third sub-cavity 916 is communicated with the second sub-cavity 915. The locking member 801 passes through the inner cavity of the pushing member 802, passes through the second sub-cavity 915 and the third sub-cavity 916, and passes through the distal end opening of the transition member 90. The locking member 801 can move axially relative to the second fixed body 92 and the pushing member 802 in the channel formed by the second sub-cavity 915, the third sub-cavity 916 and the pushing member 802.

[0094] Furthermore, the calibers of the second sub-cavity 915 and the third sub-cavity 916 may be substantially consistent with the caliber of the inner cavity of the pushing member 802, and the calibers of the three are all larger than the outer diameter of the locking member 801, so as to jointly form a smoother channel to facilitate smoother movement of the locking member 801 therein.

[0095] The first fixing body 91 and the second fixing body 92 are cylindrical structures extending in the axial direction. In this embodiment, the cross-sectional outer contour of the first fixing portion 912 may be elliptical, and in other embodiments may be circular, triangular, quadrilateral, and other shapes. The cross-sectional outer contour of the second fixing portion 913 may be circular, and in other embodiments may be elliptical, triangular, quadrilateral, and other shapes.

[0096] The fixing wire 712 is disposed on the outer surface of the second fixing body 92 and extends from the proximal end to the distal end of the second fixing body 92 to be connected with the catching wire 711 . The catching wire 711 is located at one side of the distal end of the second fixing body 92 .

[0097] Please also refer to Fig.19 , Fig. 20 In one implementation manner of this embodiment, the first capturing member 71 includes a first capturing wire 7111, a second capturing wire 7112, a first fixed wire 7121 and a second fixed wire 7122, the second capturing member 72 includes a third capturing wire 7113, a fourth capturing wire 7114, a third fixed wire 7123 and a fourth fixed wire 7124, the capturing portion 70 of this embodiment also includes a connecting portion 716 and an end wire 714, wherein the connecting portion 716 includes a first connecting portion 716a, a second connecting portion 716b and a third connecting portion 716c, and the end wire 714 includes a first end wire 714a and a second end wire 714b.

[0098] The proximal end of the first catching wire 7111 is connected to the distal end of the first fixing wire 7121, the proximal end of the second catching wire 7112 is connected to the distal end of the second fixing wire 7122, and the proximal end of the first fixing wire 7121 is also connected to the first end wire 714a through the first connecting portion 716a. The proximal end of the second fixing wire 7122 is also connected to the proximal end of the third fixing wire 7123 through the second connecting portion 716b, and the distal end of the third fixing wire 7123 is connected to the third catching wire 7113, the proximal end of the fourth catching wire 7114 is connected to the distal end of the fourth fixing wire 7124, and the proximal end of the fourth fixing wire 7124 is also connected to the second end wire 714b through the third connecting portion 716c. The distal end of the first catching wire 7111 is connected to the distal end of the second catching wire 7112, and the distal end of the third catching wire 7113 is connected to the distal end of the fourth catching wire 7114. The first fixing wire 7121, the second fixing wire 7122, the third fixing wire 7123, the fourth fixing wire 7124, the first end wire 714a and the second end wire 714b all extend substantially along the axial direction of the second fixing body 92 (i.e., the axial direction of the transition piece 90). Along the outer periphery of the second fixing body 92, the first end wire 714a, the first fixing wire 7121, the third fixing wire 7123, the second end wire 714b, the fourth fixing wire 7124 and the second fixing wire 7122 are arranged in sequence. It can be understood that in other embodiments, one or more of the first fixing wire 7121, the second fixing wire 7122, the third fixing wire 7123, the fourth fixing wire 7124, the first end wire 714a and the second end wire 714b may extend obliquely relative to the axial direction of the second fixing body 92.

[0099] The connecting portion 716 is an arc-shaped structure that is bent toward the proximal end. One end of the first connecting portion 716a is connected to the proximal end of the first fixed wire 7121, and the other end of the first connecting portion 716a is connected to the proximal end of the first end wire 714a. One end of the second connecting portion 716b is connected to the proximal end of the second fixed wire 7122, and the other end of the second connecting portion 716b is connected to the proximal end of the third fixed wire 7123. The second connecting portion 716 is closer to the proximal end of the capture portion 70 than the first connecting portion 716a. One end of the third connecting portion 716c is connected to the proximal end of the fourth fixed wire 7124, and the other end of the third connecting portion 716c is connected to the proximal end of the second end wire 714b. In other embodiments, the connecting portion 716 is not necessarily a filament, and can be any other applicable shape such as a sheet or a mesh.

[0100] The end wire 714 extends from the proximal end to the distal end to form a tail end, and the tail end is located between the proximal end and the distal end of the second fixing body 92 or is flush with the distal end of the second fixing body 92 .

[0101] In the present embodiment, the first fixed wire 7121, the third fixed wire 7123 and the second end wire 714b are all located at one radial side of the third sub-cavity 916 (also can be called to be located at one radial side of the second fixed body 92 or the locking piece 801), the second fixed wire 7122, the fourth fixed wire 7124 and the first end wire 714a are all located at the other radial side of the third sub-cavity 916 (also can be called to be located at the other radial side of the second fixed body 92 or the locking piece 801). The wire located at the radial same side of the third sub-cavity 916 is defined as the same side wire, and the wire located at the radial different sides of the third sub-cavity 916 is defined as the opposite side wire, and the distance between the far ends of the same side wire is less than the distance between the far ends of the wires on the opposite sides. For example, the distance between the far ends of the first fixed wire 7121 and the far ends of the second fixed wire 7122 is greater than the distance between the far ends of the first fixed wire 7121 and the far ends of the third fixed wire 7123. Since the circumferentially adjacent opposite-side wires in this embodiment are connected by the connecting portion 716, the connection firmness between the first catching member 11 and the second catching member 72 and the second fixed body 92 can be greatly improved, so the risk of the first catching member 71 and the second catching member 72 coming off the second fixed body 92 due to excessive pulling force during the recovery process can be reduced. In addition, the first fixing wire 7121 and the second fixing wire 7122 of the first catching member 71 are arranged on both sides of the radial direction of the second fixed body 92, and the third fixing wire 7123 and the fourth fixing wire 7124 of the second catching member 72 are arranged on both sides of the radial direction of the second fixed body 92, which not only provides a larger inner ring space for the first catching member 71 and the second catching member 72, but also further improves the connection strength between the catching member and the transition member 90.

[0102] It can be understood that in other embodiments, the arrangement positions of the above-mentioned fixing wire 712 and the end wire 714 can be different, as long as they can be firmly connected to the second fixing body 92. In addition, in other embodiments, the above-mentioned end wire 714 and the connecting portion 716 can be omitted.

[0103] In this embodiment, the first capturing member 71 and the second capturing member 72 can be integrally formed and formed from the same wire material. In other embodiments, they can be separately manufactured and then spliced ​​together.

[0104] Reference Fig.18 The first sleeve 901 of the capture part 70 is sleeved outside the second fixed body 92 and the fixed wire 712 to wrap the fixed wire 712 and the end wire 714 between the second fixed body 92 and the first sleeve 901. The first sleeve 901 is fixedly connected to the second fixed body 92, and the distal end of the first sleeve 901 can be flush with the distal end of the second fixed body 92. In other embodiments, the distal end of the first sleeve 901 can be located between the distal end of the second fixed body 92 and the proximal end of the second fixed body 92, or the distal end of the first sleeve 901 can exceed the distal end of the second fixed body 92, that is, farther away from the proximal end of the recovery device 300 than the distal end of the second fixed body 92. In this embodiment, the proximal end of the first sleeve 901 is roughly flush with the proximal end of the second fixed body 92. In other embodiments, the proximal end of the first sleeve 901 may be located between the distal end of the second fixed body 92 and the proximal end of the second fixed body 92, or the proximal end of the first sleeve 901 may exceed the proximal end of the second fixed body 92, that is, closer to the proximal end of the recovery device 300 than the proximal end of the second fixed body 92. The first sleeve 901 may be made of metal materials, such as stainless steel, nickel-titanium alloy and other metal materials, and the first sleeve 901 may be fixedly connected to the second fixed body 92 by welding, bonding, clamping and other methods. In this embodiment, the first sleeve 901 is provided, and the first sleeve 901 is fixedly connected to the second fixed body 92, so that the second fixed body 92 and the fixing wire 712 and the end wire 714 are firmly connected, without the need to weld the fixing wire 712, the end wire 714 and the second fixed body 92, thereby avoiding damage to the fixing wire 712 and the end wire 714 caused by direct welding between the fixing wire 712, the end wire 714 and the second fixed body 92.

[0105] The cross-sectional shape of the first sleeve 901 is similar to an ellipse. In other embodiments, the cross-sectional shape of the first sleeve 901 may be any other suitable shape such as a circle, a triangle, a quadrilateral, etc. Along the long diameter (similar to the long diameter of an ellipse) direction of the first sleeve 901, the first fixing wire 7121, the third fixing wire 7123 and the second end wire 714b are all located on one radial side of the second fixed body 92 (or transition piece 90), and the second fixing wire 7122, the fourth fixing wire 7124 and the first end wire 714a are all located on the other radial side of the second fixed body 92.

[0106] Reference Fig.18 , Fig.19 , Fig. 20 The first connection portion 716a, the second connection portion 716b and the third connection portion 716c are at least partially not wrapped by the first sleeve 901, and extend beyond the proximal end of the first sleeve 901 to the radially outer side of the transition piece 90. In addition, the first connection portion 716a, the second connection portion 716b and the third connection portion 716c are all arranged obliquely relative to the central axis of the transition piece 90, and the proximal ends of the first connection portion 716a, the second connection portion 716b and the third connection portion 716c are farther away from the central axis of the pusher 802 than the distal ends. The inclined first connection portion 716a, the second connection portion 716b and the third connection portion 716c can play a limiting role, which can prevent the fixing wire 712 from moving toward the distal end relative to the second fixing body 92, and further improve the connection stability.

[0107] Please also refer to Fig.11 The second sleeve 902 of the capture part 70 is sleeved outside the first sleeve 901, and the second sleeve 902 completely covers the circumferential outer surface of the first sleeve 901 and all the connecting parts 716, and the proximal end of the second sleeve 902 at least extends to the second fixing part 913 and covers the circumferential outer surface of the second fixing part 913. The second sleeve 902 can be made of a relatively soft polymer material (for example, PEBAX, etc.), and the second sleeve 902 can cover the first sleeve 901 and the step formed between the first sleeve 901 and the outer surface of the transition piece 90, thereby reducing the risk of causing damage to biological tissues.

[0108] In this embodiment, the pusher 802 is a tubular structure with an inner cavity, and the material used can be one or more of metals and polymers, such as nickel-titanium alloy, stainless steel, polyester, silicone, etc.

[0109] The pushing member 802 includes, from the proximal end to the distal end, a pushing portion and a guiding portion connected to the distal end of the pushing portion. The pushing portion and the guiding portion can be an integrated structure, or they can be made separately and then spliced ​​and fixed. Under the same external force, the guiding portion is easier to deform than the pushing portion, and the bending stiffness of the guiding portion is smaller than the bending stiffness of the pushing portion. In the process of pushing the capturing portion 70, the guiding portion is easier to deform and easier to approach the target object, thereby improving the capturing efficiency.

[0110] Exemplarily, both the guide portion and the push portion can be made of a tube formed by twisting a single or multiple wires. For example, the guide portion and the push portion can be made of the same tube, the distal end of the tube is ground to form the guide portion, and the remaining area serves as the push portion.

[0111] The locking member 801 has an elongated structure and is inserted into the inner cavity of the pushing member 802. Fig.21 When the first capturing member 71 and the second capturing member 72 are in the second state, the handle 80 can be operated to make the locking member 801 move toward the distal direction of the capturing portion 70 and pass through the first capturing member 71 and / or the second capturing member 72 to cooperate with the first capturing member 71 and / or the second capturing member 72 to form a distal closed locking space, which can enclose the target object in the locking space to prevent the target object from escaping from between the first capturing member 71 and the second capturing member 72.

[0112] Reference Fig.15 The locking member 801 includes a main body section 8011 and a protruding structure 8012 connected to the distal end of the main body section 8011. The main body section 8011 and the protruding structure 8012 can be an integrated structure, or they can be made separately and then spliced ​​and fixed. The protruding structure 8012 can make it easier for the locking member 801 to bypass the target object and continue to move to the distal end, thereby improving the capture efficiency. In addition, even if the protruding structure 8012 touches human tissue, it is not easy to damage human tissue, thereby improving the safety performance of the recovery device 300. The material used for the protruding structure 8012 can be selected from one or more of metal, polymer or inorganic non-metallic materials. For example, relatively hard materials such as nickel-titanium alloy, ceramic, PTFE, PET, etc. can be selected, and soft materials such as silicone can also be selected. The protruding structure 8012 can be directly connected to the main body section 8011 by welding, hot melting, entanglement, bonding, etc. The protruding structure 8012 can be a spherical, hemispherical, teardrop-shaped, etc. shape with a relatively rounded distal end. In order to make it easier for the locking member 801 to bypass the target object, the distal end of the protruding structure 8012 may have a smooth outer surface by polishing, coating with a biocompatible smooth coating, etc. In addition, the protruding structure 8012 may be a solid structure or a hollow structure, and the hollow structure is conducive to reducing the weight of the head end, and preventing the head end of the head section 8012 from being excessively tilted compared to the pushing section due to excessive weight.

[0113] In other embodiments, in order to further improve the ability of the locking member 801 to bypass obstacles, the protruding structure 8012 can be rotatably connected to the main body section 8011. Exemplarily, a receiving groove (not shown) is formed at the distal end of the main body section 8011 to accommodate the protruding structure 8012, and after it is inserted into the receiving groove, it can rotate in multiple directions in the receiving groove. The diameter of the protruding structure 8012 is larger than the opening diameter of the receiving groove to prevent the protruding structure 8012 from falling out of the receiving groove, but it can rotate freely in the receiving groove.

[0114] In other embodiments, the distal end of the locking member 801 may be annular, or the locking member 801 includes a core wire, the distal end of the core wire is connected to a spring, or the distal end of the core wire includes a tapered segment, the outer surface of the tapered segment is wound with a spring (for example, the distal end of the spring is fixedly connected to the distal end of the tapered segment, and the spring is wound toward the proximal end), the diameter of the tapered segment is less than or equal to other segments of the core wire, and the diameter of the tapered segment gradually decreases from the proximal end to the distal end. Such a configuration makes it easier for the locking member 801 to bypass the target object.

[0115] It is understandable that the present invention does not limit the number of locking members 801, which may be one or more. When there are multiple locking members 801, multiple inner cavities may be provided inside the pushing member 802, each inner cavity containing a locking member 801, so that multiple locking members 801 can pass through different positions of the distal opening of the pushing member 802, which can improve the efficiency of forming a locking space with the first catching member 71 and / or the second catching member 72. In other embodiments, the locking member 801 may not be provided in the inner cavity of the pushing member 802, but may be slidably provided outside the pushing member 802.

[0116] Reference Figure 1 This embodiment also provides a recovery system, including the above-mentioned recovery device 300, a loader 101 and a hemostatic valve 102, wherein the proximal end of the loader 101 is detachably connected to the hemostatic valve 102, the capture portion 70 can be radially compressed and loaded in the loader 101, and can move axially relative to the loader 101.

[0117] Further, the above-mentioned recovery system may also include an outer sheath 103, an inner sheath 104, and a transition joint 105, wherein the transition joint 105 may be inserted into the proximal end of the outer sheath 103 and communicated with the outer sheath 103, the inner sheath 104 may be sequentially inserted into the transition joint 105 and the outer sheath 103, and the inner sheath 104 may move axially relative to the outer sheath 103 and the transition joint 105, the loader 101 may be inserted into the proximal end of the inner sheath 104 and communicated with the inner sheath 104, the recovery device 300 may penetrate the loader 101, and pass out from the distal ends of the outer sheath 103 and the inner sheath 104, so that the capture portion 70 is located outside the distal ends of the outer sheath 103 and the inner sheath 104, and the capture portion 70 may be radially compressed in the inner sheath 104. The inner sheath 104 and the outer sheath 103 are used in combination to improve the anti-bending performance.

[0118] The outer sheath 103, the inner sheath 104, the transition joint 105, and the loader 101 all have hollow tubular components, and can be made of suitable polymer and / or metal materials. The pusher 802 can be sequentially arranged in the loader 101 and the inner sheath 104, and can be axially movable relative to the loader 101 and the inner sheath 104. The distal end of the pusher 802 is connected with the capture part 70, and the capture part 70 can also be axially movable relative to the loader 101 and the inner sheath 104, and the handle 80 is connected with the pusher 802, and the pusher 802 can be controlled to move relative to other parts by operating the handle 80, so as to move relative to other parts with the capture part 70. The setting of the transition joint 105 can reduce the resistance of the inner sheath 104 when passing through the outer sheath 103, and can reduce the damage of the inner sheath 104 when passing through the outer sheath 103, and can also avoid the leakage of blood caused by damaging the outer sheath 103 gasket when the larger foreign body is taken out from the outer sheath 103.

[0119] In this embodiment, the outer sheath 103 has a distal bending adjustment function, or the distal end of the outer sheath 103 forms a pre-bending structure. The inner sheath 104 may have a distal bending adjustment function, or the distal end of the inner sheath 104 forms a pre-bending structure, or the inner sheath 104 may not have a bending adjustment function or a pre-bending structure. The outer sheath 103 may include a first sheath body and a first reinforcement section arranged at the distal end of the first sheath body, and the hardness of the first reinforcement section is higher than the hardness of the first sheath body. The inner sheath 104 may include a second sheath body and a second reinforcement section arranged at the distal end of the second sheath body, and the hardness of the second reinforcement section is higher than the hardness of the second sheath body. An easy-bending section may also be arranged between the second sheath body and the second reinforcement section, and the bending stiffness of the easy-bending section is less than the bending stiffness of the second sheath body. The arrangement of the first reinforcement section and the second reinforcement section is conducive to improving the hardness of the distal ends of the inner sheath 104 and the outer sheath 103, which is not easy to expand and deform in the process of auxiliary drawing and tissue adhesion. The first reinforcement section and the second reinforcement section can be obtained by selecting a material with higher hardness, increasing the material thickness, and arranging a reinforcement layer. The provision of the flexible section can make the inner sheath 104 more compliant with deformation, and the flexible section can also be obtained by selecting a flexible material, changing the pitch of the spring provided therein, etc. In other embodiments, one or more of the first reinforcement section, the second reinforcement section, and the flexible section can be omitted.

[0120] The following specifically describes the process of recovering the electrode lead 200 of the cardiac implantable medical device using the recovery system of this embodiment (see Fig.21 ), the method comprising:

[0121] Step 1: Connect the hemostatic valve 102 to the proximal end of the loader 101 , and place the capture portion 70 into the loader 101 .

[0122] Step 2: Connect the loader 101 to the inner sheath 104 and push the capture portion 70 into the inner sheath 104 .

[0123] Step 3: Use the outer sheath 103 to establish a delivery channel, pass the inner sheath 104 equipped with the capture part through the transition joint 105, and connect it with the outer sheath 103, and the capture part 70 enters the outer sheath 103 together with the inner sheath 104 and reaches the distal end.

[0124] Step 4: Push the push member 802 to extend the capture portion 70 out of the distal ends of the inner sheath 104 and the outer sheath 103 and approach the electrode wire 200. Adjust the angle of the outer sheath 103 and rotate and move the push member 802 back and forth to position the electrode wire 200 between the first capture member 71 and the second capture member 72.

[0125] Step 5: Keep the capturing part 70 stationary and push the inner sheath 104 forward. The first capturing part 71 and the second capturing part 72 are squeezed by the distal opening of the inner sheath 104 so that the parts outside the inner sheath 104 are brought closer together until the first capturing part 71 and the second capturing part 72 form an interlaced configuration. At this time, the first capturing part 71 and the second capturing part 72 are in the second state, thereby preventing the electrode wire 200 from escaping from the distal end of the capturing part 70.

[0126] Step six: Control the operating component 82 to be pushed toward the distal end relative to the holding component 81. At this time, the locking component 801 moves toward the distal end relative to the capturing part 70 until it is inserted into the first capturing component 71 and / or the second capturing component 72 to cooperate with the first capturing component 71 and / or the second capturing component 72 to form a locking space. The electrode wire 200 is enclosed in the locking space. After confirming that the locking is successful, rotate the operating component 82 relative to the holding component 81 to a locked state.

[0127] Step 7: Keep the inner sheath 104 still, pull the pusher 802 so that the electrode wire 200 enters the inner sheath 104 together with the capture part 70. For the electrode wire 200 with severe adhesion, the inner sheath 104 or the outer sheath 103 can be pushed forward during the pulling process (the outer sheath 103 can adjust the angle to follow the direction of the electrode wire 200), and the heart tissue is peeled off along the electrode wire 200 by the reaction force, so as to better remove the electrode wire 200. When the electrode wire 200 completely enters the inner sheath 104, the inner sheath 104 and the capture part 70 together remove the electrode along the inner cavity of the outer sheath 103.

[0128] Step 7 can be replaced by step 8:

[0129] Step eight: Keep the inner sheath 104 and the retrieval device 300 relatively fixed (the tail hemostasis valve 102 fixes the two, and the inner sheath 104 is pulled together with the retrieval device 300 when pulling), push the outer sheath 103 forward during the pulling process (the outer sheath 103 can adjust the angle to follow the direction of the electrode wire 200), follow the electrode wire 200, use the reaction force to peel off the heart tissue, and better remove the electrode wire 200, when the electrode wire 200 is separated from the heart tissue, pull the inner sheath 104 and the retrieval device 300 together, when the electrode wire 200 is about to reach the proximal end of the outer sheath 103, insert the transition joint 105, so that the electrode wire 200 comes out of the outer sheath 103 through the transition joint 105.

[0130] In the above steps 7 and 8, if only one electrode wire 200 needs to be removed, after the electrode wire 200 completely enters the inner sheath 104 / outer sheath 103, the inner sheath 104, the outer sheath 103 and the recovery device 300 can be removed from the body together.

[0131] It is understandable that the above-mentioned recycling method may vary depending on the structure of the recycling device 300 , and those skilled in the art may select an appropriate recycling method according to the specific application scenario and the structure of the recycling device 300 .

[0132] The first catch member 71 and the second catch member 72 of the recovery device 300 of this embodiment are in the second state, so the target object can be confined in the catch space 70a therebetween, and the size of the catch space 70a is adjustable. By reducing the size of the catch space 70a, the first catch member 71 and the second catch member 72 can form a clamping force on the target object, so that the target object can be firmly confined between the first catch member 71 and the second catch member 72, and a firm catch can be achieved; in addition, when in the second state, the locking member 801 can pass through at least one of the first capture member 71 and the second capture member 72 more conveniently and efficiently, thereby cooperating with the first capture member 71 and / or the second capture member 72 to lock the target object. In particular, in the second state, the distal ends of the first capture member 71 and the second capture member 72 enclose a third through hole 75. When the locking member 801 passes through the third through hole 75 in the axial direction, it can be simultaneously penetrated in the first capture member 71 and the second capture member 72, and can simultaneously cooperate with the first capture member 71 and the second capture member 72 to lock the target object. Therefore, the recovery device 300 of this embodiment can efficiently and firmly capture the electrode wire 200, greatly reducing the operation time and improving the success rate of the operation.

[0133] It is understandable that in another embodiment, the first state and the second state can be switched in other ways. The difference between this embodiment and the aforementioned embodiment is that when the capture portion 70 is completely released from the inner sheath 104, it is in the second state, and the recovery device 300 also includes a pull line connected to the capture portion 70, and the pull line can drive the first capture member 71 and / or the second capture member 72 to move, so that the first capture member 71 and the second capture member 72 in the second state are separated from each other and switched to the first state. In this embodiment, the push member 802 can be omitted, and the capture portion 70 can be connected to the distal end of the inner sheath 104, and the capture portion 70 is pushed to the vicinity of the target object by the inner sheath 104.

[0134] 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.

[0135] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A recovery device, characterized in that: It comprises a catch portion, a locking member and a handle, wherein the handle comprises: A grip assembly, comprising a housing and a first locking portion connected to the housing, wherein the housing comprises a proximal opening and a receiving inner cavity communicating with the proximal opening; An operating assembly is inserted into the receiving inner cavity of the holding assembly from the proximal opening of the holding assembly, the operating assembly is used to control the locking member, and the operating assembly includes an operating body and a second locking part connected to the operating body; The holding assembly and the operating assembly have a locked state and an unlocked state. When in the unlocked state, the operating assembly can axially move to a first axial position relative to the holding assembly to drive the locking member to move axially to a second axial position relative to the capturing portion. When in the unlocked state and the operating component moves to the first axial position, the operating component can rotate circumferentially relative to the holding component, and when the operating component rotates circumferentially in the first direction relative to the holding component to the first rotation position, the first locking portion and the second locking portion cooperate with each other to make the holding component and the operating component relatively fixed in the axial direction, in the locked state, and the locking member is axially locked relative to the capturing portion.

2. The recovery device according to claim 1, characterized in that: The operating assembly is connected to the proximal end of the locking member, and when the holding assembly and the operating assembly are in a locked state, the locking member can cooperate with the capture portion to lock the target object.

3. The recovery device according to claim 1, characterized in that: The first locking portion includes a proximal limit piece and a distal limit piece connected to the inner wall of the outer shell of the holding assembly, and a limit cavity is formed between the proximal limit piece and the distal limit piece. When the second locking portion is located in the limit cavity and the operating assembly is located at the first rotation position relative to the holding assembly, the second locking portion is axially restricted in the limit cavity so that the holding assembly and the operating assembly are in a locked state.

4. The recovery device according to claim 3, characterized in that: The limiting cavity includes a limiting groove, and the limiting groove includes a proximal inner wall formed by the distal surface of the proximal limiting member and a distal inner wall formed by the proximal surface of the distal limiting member. The second locking portion includes a cylindrical body and a locking arm connected to the cylindrical body, and the locking arm extends outward from the cylindrical body in a direction away from the central axis of the cylindrical body. When the second locking portion is located in the limiting cavity and the operating assembly is located at the first rotation position relative to the holding assembly, the locking arm enters the limiting groove and is confined between the proximal inner wall and the distal inner wall of the limiting groove.

5. The recovery device according to claim 3, characterized in that: The holding assembly also includes a stopper, which is located in the limiting cavity and connected to the inner wall of the outer shell of the holding assembly. The stopper protrudes relative to the inner wall of the outer shell of the holding assembly toward the direction close to the central axis of the holding assembly to limit the operating assembly located at the first rotation position from continuing to rotate circumferentially relative to the holding assembly toward the first direction.

6. The recovery device according to claim 3, characterized in that: The distal end limiting member includes a pressing unit that is elastically retractable in the axial direction, and when the holding assembly and the operating assembly are in a locked state, the pressing unit presses the second locking portion.

7. The recovery device according to claim 6, characterized in that: The pressing unit includes a shell having an inner cavity, a proximal opening located on the proximal surface of the shell, an elastic member located in the inner cavity of the shell and retractable in the axial direction, and a pressing block connected to the elastic member. The pressing block can move axially relative to the shell in the inner cavity of the shell and extend from the inner cavity of the shell to the limiting cavity through the proximal opening of the shell. When the holding assembly and the operating assembly are in a locked state, the pressing block presses the second locking portion toward the proximal end.

8. The recovery device according to claim 3, characterized in that: The proximal end surface of the second locking portion is further provided with a stop ridge, and the proximal limiter is further provided with a stop groove with a distal opening; or, the proximal end surface of the second locking portion is further provided with a stop groove with a distal opening, and the proximal limiter is further provided with a stop ridge; When the holding assembly and the operating assembly are in a locked state, the stopping ridge enters the stopping groove to limit the circumferential rotation of the operating assembly relative to the holding assembly toward a first direction and a second direction opposite to the first direction.

9. The recovery device according to claim 1, characterized in that: The outer wall of the operating body is provided with a blocking strip extending axially, and the holding assembly also includes a first rolling member arranged on the inner wall. When the holding assembly and the operating assembly are in the unlocked state and the operating assembly is in the second rotation position relative to the holding assembly, the first rolling member presses against the blocking strip.

10. The recovery device according to claim 9, characterized in that: The outer wall of the operating body is also provided with a first sliding groove extending along the circumference of the operating body and connected to the blocking strip, and the gripping assembly also includes a second rolling member arranged on the inner wall. When the operating assembly is in the unlocked state and the operating assembly is located at the first axial position, the second rolling member cooperates with the first sliding groove to guide the operating assembly to rotate circumferentially relative to the gripping assembly; and / or, the outer wall of the operating body is also provided with a second sliding groove extending along the circumference of the operating body and connected to the blocking strip. When the operating assembly is in the unlocked state and the operating assembly is located at the first axial position, the first rolling member cooperates with the second sliding groove to guide the operating assembly to rotate circumferentially relative to the gripping assembly.

11. The recovery device according to claim 9, characterized in that: The outer wall of the operating body is also provided with a first sliding groove extending along the circumference of the operating body and connected to the blocking strip, and a first guide groove and a second guide groove connected to the first sliding groove and extending along the axial direction of the operating body, and the gripping assembly also includes a second rolling member arranged on the inner wall, when in the locked state, the second rolling member is located in the first guide groove, when in the unlocked state, and the operating body is located in the second rotation position relative to the gripping assembly, the second rolling member is located in the second guide groove, and the depths of the first guide groove and the second guide groove are both greater than the depth of the first sliding groove; and / or, the outer wall of the operating body is also provided with a second sliding groove extending along the circumference of the operating body and connected to the blocking strip, and a third guide groove and a fourth guide groove connected to the second sliding groove and extending along the axial direction of the operating body, when in the locked state, the first rolling member is located in the third guide groove, when in the unlocked state, and the operating body is located in the second rotation position relative to the gripping assembly, the first rolling member is located in the fourth guide groove, and the depths of the third guide groove and the fourth guide groove are both greater than the depth of the second sliding groove.

12. The recovery device according to claim 9, characterized in that: The first rolling member includes a receiving groove fixed on the inner wall of the outer shell of the gripping assembly, and a ball received in the receiving groove, the receiving groove has a notch, the ball extends out from the notch and can rotate relative to the receiving groove, and the protruding height of the ball relative to the notch is variable; and / or the gripping assembly also includes a second rolling member arranged on the inner wall, the second rolling member includes a receiving groove fixed on the inner wall of the outer shell of the gripping assembly, and a ball received in the receiving groove, the receiving groove has a notch, the ball extends out from the notch and can rotate relative to the receiving groove, and the protruding height of the ball relative to the notch is variable.

13. The recovery device according to claim 1, characterized in that: The recovery device also includes a pushing member in the shape of a hollow tube, the proximal end of the pushing member is fixedly connected to the handle, the distal end of the pushing member is fixedly connected to the proximal end of the capturing portion, the locking member is inserted into the pushing member, and can move axially between an initial position and a locking position relative to the pushing member, when the locking member is in the initial position relative to the pushing member, the distal end of the locking member extends out of the distal end of the pushing member and is located between the proximal end and the distal end of the capturing portion, and there is a first distance between the distal end of the locking member and the distal end of the pushing member, and when the locking member is in the locking position relative to the pushing member, there is a second distance between the distal end of the locking member and the distal end of the pushing member, and the second distance is greater than the first distance.

14. A recycling system, characterized in that: It comprises a recovery device, a loader and a hemostatic valve as described in any one of claims 1 to 13, wherein the proximal end of the loader is detachably connected to the hemostatic valve, the capturing portion can be radially compressed and loaded in the loader, and can move axially relative to the loader.

15. The recovery system according to claim 14, characterized in that The recovery system also includes an outer sheath, an inner sheath, and a transition joint. The transition joint can be inserted into the proximal end of the outer sheath and communicated with the outer sheath. The inner sheath can be inserted into the transition joint and the outer sheath in sequence, and the inner sheath can move axially relative to the outer sheath and the transition joint. The loader can be inserted into the proximal end of the inner sheath and communicated with the inner sheath. The recovery device can pass through the loader and pass out from the distal ends of the outer sheath and the inner sheath, so that the capture part is located outside the distal ends of the outer sheath and the inner sheath, and the capture part can be radially compressed in the inner sheath.

16. The recovery system according to claim 15, characterized in that The outer sheath is a bending-adjustable sheath, comprising a first sheath body and a first reinforcement segment arranged at the distal end of the first sheath body, the hardness of the first reinforcement segment being higher than the hardness of the first sheath body; and / or, the inner sheath comprises a second sheath body and a second reinforcement segment arranged at the distal end of the second sheath body, the hardness of the second reinforcement segment being higher than the hardness of the second sheath body, and an easy-to-bend segment is further arranged between the second sheath body and the second reinforcement segment, the bending stiffness of the easy-to-bend segment being lower than the bending stiffness of the second sheath body.

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