Connecting mechanism and wire drawing device

Abstract

The invention relates to a connecting mechanism and a wire pulling device. The connecting mechanism comprises a near-end connecting piece, a far-end connecting piece and a locking assembly. The first connecting end of the near-end connecting piece can be connected with a pull rod of the wire pulling device. The far-end connecting piece is connected to the second connecting end of the near-end connecting piece, an accommodating cavity of the far-end connecting piece can accommodate at least part of a connector of the blood pump, and the cavity wall of the accommodating cavity can be clamped with the connector; the far-end connecting piece comprises a first shell and a second shell, the first shell is connected with the near-end connecting piece, one side of the second shell is rotationally connected with the first shell, and the other side of the second shell can be opened or closed relative to the first shell; and the second shell is opened relative to the first shell, so that the far-end connecting piece is separated from the connector. The locking assembly can lock the first shell and the second shell so as to keep the second shell closed relative to the first shell. The connecting mechanism and the wire pulling device can be conveniently connected with or separated from the connector in an operation, and the condition of rotation and slipping is avoided.

Description

Technical Field

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

[0002] After the blood pump is implanted in the patient's body, the connector of the blood pump needs to be pulled out of the body so that the blood pump is electrically connected to an external controller. Usually, the operator uses a wire pulling device to pass through human tissue and connect to the connector to pull the connector of the blood pump. After the connector is pulled out of the body, the wire pulling device is separated from the connector. However, the current wire pulling device and the connector are difficult to separate. Summary of the invention

[0003] Based on this, it is necessary to provide a connection mechanism and a wire pulling device to address the current problem of difficulty in separating the wire pulling device and the connector, which can facilitate connection or separation with the connector during surgery and avoid rotation and slippage.

[0004] In a first aspect, the present application provides a connection mechanism, comprising:

[0005] A proximal connecting member, the proximal connecting member having a first connecting end and a second connecting end opposite to each other, the first connecting end being connectable to a pull rod of a wire pulling device;

[0006] a distal connecting piece, the distal connecting piece being connected to the second connecting end, the distal connecting piece having a receiving cavity, the receiving cavity being capable of receiving at least part of a connector of a blood pump, and the cavity wall of the receiving cavity being capable of engaging with the connector so that the distal connecting piece is connected to the connector; the distal connecting piece comprising a first shell and a second shell, the first shell being connected to the proximal connecting piece, one side of the second shell being rotatably connected to the first shell, and the other side of the second shell being capable of opening or closing relative to the first shell; wherein the second shell is closed relative to the first shell so that the first shell and the second shell enclose the receiving cavity, and the second shell is opened relative to the first shell so that the distal connecting piece is separated from the connector; and

[0007] A locking assembly, wherein the locking assembly can lock the first shell and the second shell to keep the second shell closed relative to the first shell.

[0008] In one embodiment of the present application, the first shell has a first lug, the second shell has a second lug, and the distal connector further includes a connecting shaft, the connecting shaft is passed through the first lug and the second lug, and the connecting shaft can rotate relative to at least one of the first lug and the second lug, so that the second shell can rotate relative to the first shell, and the second shell can be opened or closed relative to the first shell;

[0009] And / or, the second housing has a rotation axis relative to the first housing, and the extension direction of the rotation axis is parallel to the axial direction of the proximal connecting member;

[0010] And / or, the locking assembly is disposed on at least one of the first shell and the second shell.

[0011] In one embodiment of the present application, the locking assembly includes a buckle plate and a locking plate, the buckle plate includes a rotating part, a connecting part and a buckling part, the connecting part is located between the rotating part and the buckling part, and is connected to both the rotating part and the buckling part, the rotating part is rotatably connected to the second shell, and the buckling part can be buckled on the outer circumferential surface of the second shell; the locking plate has a first end and a second end relative to each other, the first end is rotatably connected to the connecting part, the second end is provided with a buckle, the first shell is provided with a slot, and the buckle can be buckled with the slot; wherein, the buckle is buckled with the outer circumferential surface of the second shell, and when the buckle is engaged with the slot, the locking assembly locks the first shell and the second shell.

[0012] In one embodiment of the present application, the outer circumferential surface of the first shell has a first mounting groove, the locking plate can be received in the first mounting groove, and the card groove is arranged on the bottom surface of the first mounting groove; the outer circumferential surface of the second shell has a second mounting groove, the buckle plate can be received in the second mounting groove, and the first mounting groove and the second mounting groove can be connected when the second shell is closed relative to the first shell.

[0013] In one embodiment of the present application, the outer circumferential surface of the second shell further has a first avoidance groove for a finger or an operating tool to extend into, the first avoidance groove is connected to the second mounting groove, and when the snap-fitting portion is snapped onto the outer circumferential surface of the second shell, the first avoidance groove is close to an end of the snap-fitting portion away from the rotating portion; and / or the buckle plate has an inner surface facing the second mounting groove, the inner surface is provided with a second avoidance groove for a finger or an operating tool to extend into, and the second avoidance groove is arranged at an end of the snap-fitting portion away from the rotating portion.

[0014] In one embodiment of the present application, a mounting portion is protruding on the inner wall of the first shell, and the mounting portion is arranged at one end of the first shell close to the proximal connecting member; wherein the side portion of the mounting portion is rotatably connected to the second shell; an assembly hole is provided in the middle portion of the mounting portion, and the connecting mechanism also includes a fastener, which is passed through the second connecting end of the proximal connecting member and assembled in the assembly hole.

[0015] In one embodiment of the present application, the connection mechanism further includes a sealing member, which is received in the receiving cavity and can be sealed and connected to the end of the connector, wherein:

[0016] The sealing member is fixedly connected to the inner wall of at least one of the first shell and the second shell; and / or the first shell includes a mounting portion protruding from its inner wall, the mounting portion is arranged at one end of the first shell close to the proximal connecting member, the mounting portion has a mounting hole on the side away from the proximal connecting member, and the sealing member is provided with a mounting protrusion, which is embedded in the mounting hole.

[0017] In one embodiment of the present application, the connecting mechanism also includes a sealing member accommodated in the accommodating cavity, the sealing member is provided with a central boss and an annular sealing portion arranged around the central boss, the central boss can be plugged into and matched with the port of the connector, and the annular sealing portion can be sealed against the end face of the connector.

[0018] In one embodiment of the present application, the center boss is provided with a center groove, and the center groove is formed by the inward depression of the end surface of the center boss; and / or, the outer periphery of the seal is provided with an annular groove, and the annular groove is arranged around the central axis of the center boss; and / or, the material of the seal is silicone or rubber.

[0019] In a second aspect, the present application provides a wire pulling device, comprising a pull rod and any of the above-mentioned connecting mechanisms, wherein the pull rod is detachably connected to the proximal connecting member.

[0020] After adopting the above technical solution, this application has at least the following technical effects:

[0021] The connection mechanism and wire pulling device of the present application, one side of the second shell of the distal connector of the connection mechanism is rotatably connected to the first shell, and the other side of the second shell can be opened or closed relative to the first shell, and the locking assembly can lock the first shell and the second shell to keep the second shell closed relative to the first shell. When the second shell is closed relative to the first shell, the two enclose a receiving cavity that can accommodate at least part of the connector, and the cavity wall of the receiving cavity is engaged with the connector, so that the distal connector is connected to the connector; the second shell is opened relative to the first shell, the receiving cavity is opened, and the connector can be separated from the first shell and the second shell, so that the connection mechanism is separated from the connector. Compared with the traditional method of rotating the entire connection mechanism to separate the connection mechanism from the connector, the present application can separate the connection mechanism from the connector by opening the second shell relative to the first shell, without the need to rotate the entire connection mechanism additionally, thus avoiding the situation of rotation slippage, facilitating the separation of the connection mechanism from the connector, and having higher operation safety. In addition, the first shell and the second shell are locked and fixed by the locking assembly to improve the reliability of the connection between the connection mechanism and the connector, thereby avoiding the situation of the connector and the connection mechanism being separated during the process of pulling the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the connection mechanism provided in this application from one perspective.

[0023] Figure 2 for Figure 1 The structural schematic diagram of the connecting mechanism shown is from another perspective.

[0024] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0025] Figure 4 for Figure 1 The schematic diagram of the structure is that the second shell is opened relative to the first shell after the connecting mechanism is connected to the connector.

[0026] Figure 5 for Figure 4 The structural diagram of the connector is shown.

[0027] Figure 6 for Figure 1 The structure diagram of the connecting mechanism shown is from another perspective.

[0028] Figure 7 for Figure 1 Exploded view of the connection mechanism shown.

[0029] Figure 8 for Figure 7 The structural schematic diagram of the connecting mechanism shown is from another perspective.

[0030] Fig. 9 for Figure 7 The structure schematic diagram of the first shell shown in one viewing angle.

[0031] Fig.10 for Fig. 9 The structure schematic diagram of the first shell shown in another viewing angle.

[0032] Fig.11 for Figure 7 The structure schematic diagram of the second shell shown in one viewing angle.

[0033] Fig.12 for Fig.11 The structure schematic diagram of the second shell shown in another viewing angle.

[0034] Fig.13 for Figure 1 The connecting mechanism shown is a schematic structural diagram when the locking assembly is in an unlocked state.

[0035] Fig.14 for Fig.13 The structural schematic diagram of the connecting mechanism shown is from another perspective.

[0036] Fig.15 for Fig.13 A schematic structural diagram of the locking assembly of the connecting mechanism shown.

[0037] Fig.16 for Figure 1 A schematic structural diagram of the sealing component of the connecting mechanism shown.

[0038] Fig.17 This is a schematic diagram of the structure of the wire pulling device and the connector provided in this application.

[0039] Fig.18 for Fig.17 The schematic diagram of the structure of the pull rod of the wire pulling device and the cutter head are shown.

[0040] Wherein: 1, wire pulling device; 10, connecting mechanism; 100, proximal connecting piece; 110, first connecting end; 120, second connecting end; 101, first connecting hole; 102, second connecting hole; 200, distal connecting piece; 201, engaging portion; 202, receiving cavity; 203, opening; 210, first shell; 211, first end surface; 2111, receiving groove; 212, second end surface; 213, first lug; 2131, first axial hole; 214, first inner side surface; 215, first outer peripheral surface; 216, slot; 217, first mounting slot; 218, mounting portion; 2181, assembly hole; 2182, mounting hole; 220, second housing; 221, third end surface; 222, fourth end surface; 223, second lug; 2231, second axial hole; 224, second inner side surface; 225, second outer peripheral surface; 226, second mounting portion slot; 227, first avoidance slot; 230, connecting shaft; 240, third connection end; 250, fourth connection end; 260, sealing member; 261, mounting protrusion; 262, center boss; 2621, center groove; 263, annular sealing portion; 264, annular groove; 300, fastener; 400, locking assembly; 410, locking plate; 411, first end; 412, second end; 413, buckle; 420, buckle plate; 4201, rotating part; 4202, connecting part; 4203, buckling part; 423, second avoidance groove; 424, inner surface; 430, first pin shaft; 440, second pin shaft; 50, connector; 501, end face; 510, matching part; 520, outer shell surface; 530, port; 60, pull rod; 610, rod part; 620, connector; 70, handle; 80, cutter head; O, rotating axis. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] It should be noted that the terms “distal end” and “proximal end” throughout the text are only used to indicate relative positional relationships. The “distal end” of a component refers to the end of the component that enters the patient's body first compared to the other end during normal operation and / or the end that is farther away from the operator, while the “proximal end” refers to the end that enters the patient's body later than the other end and / or the end that is closer to the operator.

[0044] After the blood pump is implanted in the patient's body, the connector of the blood pump needs to be pulled out of the body so that the blood pump is electrically connected to an external controller. Usually, the operator uses a wire pulling device to pass through human tissue and connect to the connector to pull the connector of the blood pump, and then separate the wire pulling device from the connector. However, in the current wire pulling device, the connection mechanism and the connector are connected in a rotating manner. When the connection mechanism is separated from the connector, the entire connection mechanism needs to be rotated, but the operator (especially when wearing gloves) is prone to slipping when rotating the connection mechanism, resulting in difficulty in separating the connection mechanism and the connector, and the operation is not safe enough.

[0045] To this end, the present application provides a connection mechanism, which is used to connect medical instruments to pull the medical instruments out of the body or into a target location such as the body. Optionally, the connection mechanism can connect the pull rod of the pull wire device with the connector of the blood pump (not shown) to pull the connector out of the body, so that the blood pump is electrically connected to an external controller through the connector. Of course, in other embodiments of the present application, the connection mechanism can also connect other types of surgical instruments, parts to be implanted, or parts to be pulled out.

[0046] See also Figures 1 to 5 , this application only uses the connection mechanism 10 and the connector 50 (such as Figure 5 The connection mechanism 10 can be easily connected or separated with the connector 50 during surgery, avoiding rotation slippage, shortening the time for connecting or separating the connection mechanism 10 and the connector 50, and improving the operation safety. The following introduces the specific structure of the connection mechanism 10 of an embodiment. Here is a brief introduction to the structure and principle of the wire pulling device 1. Fig.17 As shown, the wire pulling device 1 includes a pull rod 60, a handle 70 and a connecting mechanism 10 in the present application. The handle 70 is provided at one end of the pull rod 60, and the connecting mechanism 10 is detachably mounted on the other end of the pull rod 60.

[0047] See also Figures 1 to 3In one embodiment, the connection mechanism 10 includes a proximal connection member 100, a distal connection member 200 and a locking assembly 400. The proximal connection member 100 has a first connection end 110 and a second connection end 120 opposite to each other. The first connection end 110 can be connected to the pull rod 60 of the wire pulling device 1. For example, the first connection end 110 and the pull rod 60 are threadedly connected, clamped or connected in other ways. The distal connection member 200 is connected to the second connection end 120. The distal connection member 200 has a receiving cavity 202. The receiving cavity 202 can accommodate at least part of the connector 50 of the blood pump, and the cavity wall of the receiving cavity 202 can be clamped with the connector 50 to connect the distal connection member 200 to the connector 50. The distal connector 200 includes a first shell 210 and a second shell 220. The first shell 210 is connected to the proximal connector 100. One side of the second shell 220 is rotatably connected to the first shell 210, and the other side of the second shell 220 can be opened or closed relative to the first shell 210. The second shell 220 is closed relative to the first shell 210 so that the first shell 210 and the second shell 220 enclose a receiving cavity 202; the second shell 220 is opened relative to the first shell 210 so that the distal connector 200 is separated from the connector 50. The locking assembly 400 can lock the first shell 210 and the second shell 220 to keep the second shell 220 closed relative to the first shell 210.

[0048] The connection mechanism 10 of the above embodiment is rotatably connected to the first housing 210 through one side of the second housing 220, and the other side of the second housing 220 can be closed or opened relative to the first housing 210. The locking assembly 400 can lock the first housing 210 and the second housing 220 to keep the second housing 220 closed relative to the first housing 210. When the second housing 220 is closed relative to the first housing 210, the first housing 210 and the second housing 220 can be connected and fixed, so that the first housing 210 and the second housing 220 are surrounded by a receiving cavity 202 that can receive at least part of the connector 50, and the cavity wall of the receiving cavity 202 can be engaged with the connector 50, so that the distal connector 200 is connected to the connector 50. The second housing 220 rotates to open relative to the first housing 210, the receiving cavity 202 is opened, and the connector 50 can be separated from the first housing 210 and the second housing 220, so that the connection mechanism 10 is separated from the connector 50. Compared to the conventional method of separating the connecting mechanism from the connector by rotating the entire connecting mechanism, the present application separates the connecting mechanism 10 from the connector 50 by opening the second shell 220 relative to the first shell 210, without the need to rotate the entire connecting mechanism, thus avoiding the situation of rotation slippage, facilitating the separation of the connecting mechanism 10 from the connector 50, and providing higher operational safety. In addition, the first shell 210 and the second shell 220 are locked and fixed by the locking assembly 400 to improve the reliability of the connection between the connecting mechanism 10 and the connector 50, thereby avoiding the situation of the connector 50 being separated from the connecting mechanism 10 during the process of pulling the connector 50, and facilitating the wire pulling device 1 to pull the connector 50 out of the body through the connecting mechanism 10.

[0049] The proximal connecting member 100 is a component for connecting the connecting mechanism 10 and the pull rod 60. The proximal connecting member 100 is detachably connected to the pull rod 60 via the first connecting end 110. When the connector 50 needs to be pulled, the proximal connecting member 100 is installed on the pull rod 60 to achieve the connection between the connecting mechanism 10 and the pull rod 60. Fig.17 As shown, the wire pulling device 1 can then be pulled. After pulling, the proximal connector 100 can be removed from the pull rod 60, and the proximal connector 100 and the distal connector 200 can be reliably connected by screw fixation or the like to avoid separation of the proximal connector 100 and the distal connector 200 during pulling of the pull rod 60.

[0050] See also Figure 1 and Fig.17 Optionally, the proximal connector 100 is roughly cylindrical, so that the outer peripheral surface of the proximal connector 100 is smooth and has no edges. When the pull rod 60 pulls the connector 50 through the connecting mechanism 10, the outer peripheral surface of the proximal connector 100 will not scratch human tissue, thereby avoiding damage to human tissue.

[0051] See also Figure 3 and Figure 4 Optionally, the first connection end 110 is provided with a first connection hole 101, and the end of the pull rod 60 is accommodated in the first connection hole 101 and is detachably connected to the hole wall of the first connection hole 101. Optionally, the proximal connection member 100 and the pull rod 60 are connected by threads. Of course, in other embodiments of the present application, the proximal connection member 100 and the pull rod 60 can also be connected by snap-fitting or other methods, as long as the detachable connection between the proximal connection member 100 and the pull rod 60 can be achieved.

[0052] Optionally, the second connection end 120 has a second connection hole 102, the second connection hole 102 is connected to the first connection hole 101, and the diameter of the second connection hole 102 is smaller than the diameter of the first connection hole 101. In other words, the first connection hole 101 is connected to the second connection hole 102 along the axial direction of the proximal connection member 100 and penetrates the proximal connection member 100.

[0053] In the present embodiment, the axial direction of the proximal connector 100 refers to the extension direction with respect to the central axis of the proximal connector 100; the radial direction of the proximal connector 100 refers to the radius or diameter direction of the circular cross-section of the proximal connector 100, and this direction is perpendicular to the axial direction of the proximal connector 100; the circumferential direction of the proximal connector 100 refers to the circumferential direction of the circular cross-section of the proximal connector 100.

[0054] The distal connecting member 200 is a component that connects the connecting mechanism 10 and the connector 50 , and the distal connecting member 200 can be detachably connected to the connector 50 .

[0055] See also Figure 1 , Figure 3 and Figure 6 In one embodiment, the distal connection member 200 has a third connection end 240 and a fourth connection end 250 opposite to each other along the axial direction of the proximal connection member 100. The third connection end 240 is connected to the proximal connection member 100. Specifically, the third connection end 240 is connected to the second connection end 120, and the fourth connection end 250 is connected to or separated from the connector 50. The third connection end 240 is located at one end of the first shell 210 and one end of the second shell 220; the fourth connection end 250 is located at the other end of the first shell 210 and the other end of the second shell 220. Figure 1 , Figure 3 , Figure 6 The connector 50 can be installed to the fourth connection end 250, or detached from the fourth connection end 250, so as to achieve connection or separation of the connector 50 with the distal connection member 200.

[0056] The receiving cavity 202 is provided at the fourth connection end 250, so that the connector 50 is connected to the fourth connection end 250, so that the connection mechanism 10 and the connector 50 can be connected, and it is convenient for the pull rod 60 to pull the connector 50 out of the body later. After the connector 50 is pulled out of the body, the connector 50 is disassembled from the fourth connection end 250 to separate the connection mechanism 10 from the connector 50. The receiving cavity 202 also has an opening 203 for the connector 50 to enter, so that the connector 50 can be accommodated in the receiving cavity 202 through the opening 203.

[0057] The first shell 210 and the second shell 220 extend along the axial direction of the proximal connector 100. Both the first shell 210 and the second shell 220 are semi-cylindrical structures. After the first shell 210 and the second shell 220 are installed, a complete cylindrical distal connector 200 can be formed to be connected to the connector 50. Specifically, the first shell 210 and the second shell 220 are rotatably connected, so that the second shell 220 can be closed or opened relative to the first shell 210.

[0058] See also Figure 1 , Figure 3 and Figure 4 In one embodiment, the second housing 220 has a rotation axis O relative to the first housing 210, and the extension direction of the rotation axis O is parallel to the axial direction of the proximal connector 100. The second housing 220 can rotate relative to the first housing 210 around the rotation axis O, so that the second housing 220 can be closed or opened relative to the first housing 210.

[0059] In this embodiment, the extending direction of the rotation axis O is parallel to the axial direction of the proximal connecting member 100, that is, the rotation axis O extends along the Figure 3 The second housing 220 extends in the vertical direction shown, so that when the second housing 220 rotates relative to the first housing 210, for example, when the second housing 220 is opened relative to the first housing 210, the second housing 220 will not collide with the proximal connecting member 100, so that the second housing 220 can be smoothly opened relative to the first housing 210. In other embodiments, the rotation axis O can also deviate from the axial direction of the proximal connecting member 100 by a certain angle, for example, the deviation angle does not exceed 5°.

[0060] In this embodiment, the second housing 220 is rotatably connected to the first housing 210, so that after the second housing 220 rotates relative to the first housing 210, the second housing 220 is closed or opened relative to the first housing 210. Of course, in other embodiments of the present application, the first housing 210 may rotate relative to the second housing 220, or the first housing 210 and the second housing 220 may rotate relative to each other, and the principle is substantially the same as the principle of the second housing 220 rotating relative to the first housing 210, which will not be described in detail below.

[0061] When the second shell 220 rotates to be closed relative to the first shell 210, the first shell 210 and the second shell 220 can form a complete cylindrical structure. At this time, the first shell 210 and the second shell 220 are surrounded by a hollow receiving chamber 202, which is located at the end of the distal connector 200 away from the proximal connector 100. The receiving chamber 202 can receive the connector 50 to fix the connector 50 to the first shell 210 and the second shell 220, so as to achieve a reliable connection between the connector 50 and the connecting mechanism 10, and facilitate the subsequent pulling of the connector 50.

[0062] When the second shell 220 rotates to open relative to the first shell 210, the receiving cavity 202 is opened, and an opening is formed between the first shell 210 and the second shell 220. At this time, the connector 50 can be removed from between the first shell 210 and the second shell 220, so that the connector 50 and the connecting mechanism 10 are separated. Figure 4 shown.

[0063] See also Figure 1 , Figure 7 and Figure 8 In one embodiment, the first shell 210 has a first end face 211 and a second end face 212 along the circumference of the proximal connector 100. The second shell 220 has a third end face 221 and a fourth end face 222 along the circumference of the proximal connector 100. When the first shell 210 and the second shell 220 are closed, the first end face 211 is opposite to the third end face 221, and the second end face 212 is opposite to the fourth end face 222. When the second shell 220 is closed or opened relative to the first shell 210, the fourth end face 222 can approach or move away from the second end face 212. After the second shell 220 is closed relative to the first shell 210, a complete cylindrical structure can be formed, and a receiving cavity 202 is formed inside the cylindrical structure to receive the connector 50, so as to achieve a stable connection between the connecting mechanism 10 and the connector 50.

[0064] Along the circumference of the proximal connector 100, the two end faces of the first housing 210 are respectively the first end face 211 and the second end face 212, and the first end face 211 and the second end face 212 also extend along the axial direction of the proximal connector 100. Along the circumference of the proximal connector 100, the two end faces of the second housing 220 are respectively the third end face 221 and the fourth end face 222, and the third end face 221 and the fourth end face 222 also extend along the axial direction of the proximal connector 100.

[0065] The second housing 220 is rotatably connected to the first housing 210, and the third end surface 221 of the second housing 220 is rotatably connected to the first end surface 211 of the first housing 210. Thus, when the second housing 220 rotates relative to the first housing 210, the second housing 220 can drive the fourth end surface 222 to approach or move away from the second end surface 212 of the first housing 210.

[0066] See also Figure 3 , Figure 6 , Fig.10 and Fig.12 In one embodiment, the distal connecting member 200 also includes a connecting shaft 230, the first shell 210 has a first lug 213, the second shell 220 has a second lug 223, the connecting shaft 230 is passed through the first lug 213 and the second lug 223, and the connecting shaft 230 can rotate relative to at least one of the first lug 213 and the second lug 223, so that the second shell 220 can rotate relative to the first shell 210, and the second shell 220 can be opened or closed relative to the first shell 210.

[0067] Specifically, the second lug 223 is disposed on the third end surface 221. The extending direction of the connecting shaft 230 is parallel to the axial direction of the proximal connecting member 100. In some embodiments, the first lug 213 has a first shaft hole 2131, the second lug 223 has a second shaft hole 2231, and the connecting shaft 230 is rotatably disposed in the first shaft hole 2131 and the second shaft hole 2231. In some embodiments, the second housing 220 can rotate around the connecting shaft 230, that is, the connecting shaft 230 can rotate relative to the second housing 220, and is fixedly connected to the first lug 213 of the first housing 210, so that the second housing 220 rotates relative to the first housing 210. Of course, in other embodiments, the second housing 220 can also drive the connecting shaft 230 to rotate relative to the first housing 210, that is, the connecting shaft 230 can rotate relative to the first housing 210, and is fixedly connected to the second lug 223 of the second housing 220.

[0068] The first end surface 211 has a receiving groove 2111 , and the second lug 223 protrudes from the third end surface 221 and can be installed in the receiving groove 2111 .

[0069] See also Figure 4 , Figure 5 , Fig.10 and Fig.12 In one embodiment, the inner wall of at least one of the first housing 210 and the second housing 220 has a snap-fitting portion 201, and the outer wall of the connector 50 is provided with a matching portion 510 corresponding to the snap-fitting portion 201. When the second housing 220 is closed relative to the first housing 210, the snap-fitting portion 201 is snap-fitted with the matching portion 510. One of the snap-fitting portion 201 and the matching portion 510 is a protrusion, and the other is a groove matched with the protrusion.

[0070] The inner surface of the first shell 210 is a first inner side surface 214. The first inner side surface 214 connects the first end surface 211 and the second end surface 212 on the inner side of the first shell 210. Fig.10The inner surface of the second shell 220 is a second inner side surface 224, and the second inner side surface 224 connects the third end surface 221 and the fourth end surface 222 on the inner side of the second shell 220. Fig.12 Accordingly, the connector 50 has a housing surface 520, as shown in FIG. Figure 5 After the receiving cavity 202 receives the connector 50 , the outer shell surface 520 abuts against the first inner side surface 214 and the second inner side surface 224 , so that the first shell 210 and the second shell 220 can clamp the connector 50 , thereby improving the reliability of the connection between the connection mechanism 10 and the connector 50 .

[0071] The engaging portion 201 is disposed on at least one of the first inner side surface 214 and the second inner side surface 224. Correspondingly, the matching portion 510 is disposed on the outer shell surface 520, and the position of the engaging portion 201 corresponds to the position of the matching portion 510. In this way, after the receiving cavity 202 receives the connector 50, the engaging portion 201 and the matching portion 510 cooperate with each other to achieve a stable connection between the connecting mechanism 10 and the connector 50, and improve the connection strength between the connecting mechanism 10 and the connector 50.

[0072] See also Figure 5 , Figure 6 , Fig.10 and Fig.12 In this embodiment, both the first inner side surface 214 and the second inner side surface 224 have a snap-fitting portion 201, and accordingly, the outer shell surface 520 is provided with two matching portions 510, and the two matching portions 510 correspond to the two snap-fitting portions 201 respectively. Of course, in other embodiments of the present application, the first inner side surface 214 may be provided with a snap-fitting portion 201, or the second inner side surface 224 may be provided with a snap-fitting portion 201, and the outer shell surface 520 may be provided with a matching portion 510, and the matching portion 510 corresponds to and matches the snap-fitting portion 201.

[0073] In this embodiment, the engaging portion 201 is a protrusion, which is protruding on the first inner side surface 214 and the second inner side surface 224, and correspondingly, the matching portion 510 is a groove, which is recessed in the outer shell surface 520. After the receiving cavity 202 receives the connector 50, the protrusion is locked in the groove. Of course, in other embodiments of the present application, the engaging portion 201 can also be a groove, which is recessed in the first inner side surface 214 and the second inner side surface 224, and the matching portion 510 is a protrusion, which is protruding on the outer shell surface 520.

[0074] In one embodiment, the height of the protrusion is less than or equal to the depth of the groove. In this way, the protrusion can be accurately locked into the groove, avoiding the protrusion being exposed from the groove and causing the outer shell surface 520 of the connector 50 to fail to effectively abut the first inner side surface 214 and the second inner side surface 224, thereby improving the reliability of the connection between the connector 50 and the connection mechanism 10.

[0075] See also Figures 13 to 15In this embodiment, the locking assembly 400 can be rotatably disposed on the second housing 220, and can be engaged with the first housing 210 to lock the first housing 210 with the second housing 220, thereby keeping the second housing 220 closed relative to the first housing 210. In an embodiment, the locking assembly 400 can also be disposed on the first housing 210 and the second housing 220. Exemplarily, the locking assembly 400 is sleeved on the outer periphery of the first housing 210 and the second housing 220 to keep the second housing 220 closed relative to the first housing 210.

[0076] When the connector 50 ( Figure 5 ) After being pulled out of the body, by unlocking the locking assembly 400, the second shell 220 can be rotated and opened relative to the first shell 210, the accommodating cavity 202 is opened, and the connector 50 can be detached from the first shell 210 and the second shell 220, so that the connecting mechanism 10 and the connector 50 are separated.

[0077] The locking assembly 400 has a locked state and an unlocked state. When the locking assembly 400 is in the locked state, the locking assembly 400 can lock the first shell 210 and the second shell 220, thereby fixing the first shell 210 and the second shell 220, and the second shell 220 remains closed relative to the first shell 210. When the locking assembly 400 is in the unlocked state, the second shell 220 can be opened relative to the first shell 210. The locking assembly 400 can switch between the locked state and the unlocked state. After the connection mechanism 10 is connected to the connector 50, the locking assembly 400 can switch from the unlocked state to the locked state to prevent the connector 50 from being separated from the connection mechanism 10; when the locking assembly 400 switches from the locked state to the unlocked state, the connector 50 can be separated from the connection mechanism 10. Specifically, the locking assembly 400 is disposed at at least one of the first shell 210 and the second shell 220, so that when the second shell 220 is opened relative to the first shell 210, the locking assembly 400 is connected to at least one of the first shell 210 and the second shell 220, that is, the locking assembly 400 will not be separated from both the first shell 210 and the second shell 220, thereby avoiding the loss of the locking assembly 400 and facilitating the recycling of the locking assembly 400.

[0078] Continue to see Figures 13 to 15 In one embodiment, the locking assembly 400 includes a pinch plate 420 and a locking plate 410. The pinch plate 420 includes a rotating portion 4201, a connecting portion 4202, and a buckling portion 4203 connected in sequence, that is, the connecting portion 4202 is located between the rotating portion 4201 and the buckling portion 4203, and is connected to both the rotating portion 4201 and the buckling portion 4203. The rotating portion 4201, the connecting portion 4202, and the buckling portion 4203 are sequentially arranged along the circumference of the proximal connector 100, and the rotating portion 4201, the connecting portion 4202, and the buckling portion 4203 also extend along the axial direction of the proximal connector 100.

[0079] The rotating part 4201 is rotatably connected to the second shell 220, and the locking part 4203 can be locked on the outer peripheral surface of the second shell 220, that is, the locking plate 420 is locked with the outer peripheral surface of the second shell 220. For example, the locking plate 420 can be rotated in a direction away from the first shell 210 to make the locking part 4203 lock with the outer peripheral surface of the second shell 220.

[0080] The locking plate 410 has a first end 411 and a second end 412 opposite to each other. The first end 411 is rotatably connected to the connecting portion 4202, and the second end 412 is provided with a buckle 413. Specifically, the buckle 413 is convexly provided on the inner side of the second end 412. The first housing 210 is provided with a slot 216. When the locking plate 410 rotates in a direction away from the second housing 220, the buckle 413 can be engaged with the slot 216. The buckle portion 4203 is buckled with the outer circumference of the second housing 220, and when the buckle 413 is engaged with the slot 216, the locking assembly 400 locks the first housing 210 and the second housing 220. The slot 216 is recessed and arranged on the outer circumference of the first housing 210, and corresponds to the position of the buckle 413. The buckle 413 can be engaged in the slot 216. The second housing 220 can be reliably locked to the first housing 210 by the cooperation between the buckle 413 and the buckle plate 420 , thereby preventing the connection between the first housing 210 and the second housing 220 from being loosened.

[0081] Please also read Figures 9 to 11 , the first end 411 and the second end 412 also extend along the axial direction of the proximal connector 100. The first housing 210 has a first outer peripheral surface 215, which is the outer peripheral surface of the first housing 210, and the first outer peripheral surface 215 connects the first end surface 211 and the second end surface 212 on the outside. The second housing 220 has a second outer peripheral surface 225, which is the outer peripheral surface of the second housing 220, and the second outer peripheral surface 225 connects the third end surface 221 and the fourth end surface 222 on the outside.

[0082] When the locking assembly 400 is locked, the buckle 413 is aligned with the slot 216, and the locking plate 410 is pushed to rotate relative to the first housing 210, so that the locking plate 410 fits the first outer peripheral surface 215 of the first housing 210. At the same time, the locking plate 410 can drive the buckle plate 420 to move synchronously when it moves, and then the buckle plate 420 can drive the rotating part 4201 to rotate relative to the second housing 220, so that the buckle plate 420 fits the second outer peripheral surface 225 of the second housing 220. In this way, the locking assembly 400 can lock the second housing 220 to the first housing 210, and the locking assembly 400 is in a locked state.

[0083] When the locking assembly 400 is unlocked, the buckle portion 4203 of the buckle plate 420 is pulled, and the rotating portion 4201 of the buckle plate 420 can rotate relative to the second housing 220, so that the buckle portion 4203 gradually moves away from the second outer peripheral surface 225. At this time, the buckle plate 420 opens relative to the second housing 220. At the same time, the buckle plate 420 drives the locking plate 410 away from the first outer peripheral surface 215 through the rotatable first end 411, and then the locking plate 410 can drive the buckle 413 to disengage from the locking groove 216, and the locking plate 410 moves away from the first housing 210 to open relative to the first housing 210, and the locking assembly 400 is in an unlocked state.

[0084] See also Fig.13 In one embodiment, both the pinch plate 420 and the locking plate 410 are arc-shaped plate structures. When the locking assembly 400 locks the second housing 220 to the first housing 210, the locking plate 410 can fit the first outer peripheral surface 215 of the first housing 210, and the pinch plate 420 can fit the second outer peripheral surface 225 of the second housing 220, thereby improving the locking reliability of the locking assembly 400 and preventing the locking plate 410 from being separated from the first housing 210 and the pinch plate 420 from being separated from the second housing 220 by accidental touch. At the same time, the arc-shaped pinch plate 420 and the locking plate 410 can also adapt to the shapes of the first housing 210 and the second housing 220.

[0085] See also Fig. 9 , Fig.11 and Fig.14 In one embodiment, the first outer peripheral surface 215 has a first mounting groove 217, and the locking plate 410 can be accommodated in the first mounting groove 217, and the card groove 216 is arranged at the bottom surface of the groove of the first mounting groove 217. The first mounting groove 217 is recessed in the first outer peripheral surface 215, and the first mounting groove 217 extends along the circumferential direction of the proximal connecting member 100. The first mounting groove 217 provides an installation space for the locking plate 410, and the locking plate 410 does not need to be arranged on the outside of the first housing 210. In this embodiment, the first mounting groove 217 extends along the circumferential direction of the proximal connecting member 100. In other embodiments, the first mounting groove 217 can also extend along the axial direction of the proximal connecting member 100, or extend along other directions, as long as it can accommodate the locking plate 410.

[0086] When the second housing 220 is closed relative to the first housing 210, the locking plate 410 can be received in the first mounting groove 217, so that the locking plate 410 will not protrude outward in the radial direction of the proximal connector 100, and when the wire pulling device 1 pulls the connector 50 through the connecting mechanism 10, the connecting mechanism 10 will not scratch the human tissue, and at the same time, the overall structure can be made more compact and occupy less space. In addition, the card slot 216 is located at the bottom surface of the first mounting groove 217, and when the locking plate 410 is received in the first mounting groove 217, the buckle 413 can be buckled in the card slot 216.

[0087] See also Fig. 9 , Fig.11 and Fig.14 In one embodiment, the second outer peripheral surface 225 has a second mounting groove 226, and the pinch plate 420 can be accommodated in the second mounting groove 226, and the first mounting groove 217 and the second mounting groove 226 can be connected when the second shell 220 is closed relative to the first shell 210. The second mounting groove 226 is recessed in the second outer peripheral surface 225, and the second mounting groove 226 extends along the circumferential direction of the proximal connector 100. The second mounting groove 226 provides an installation space for the pinch plate 420, and the pinch plate 420 does not need to be arranged on the outside of the second shell 220. In this embodiment, the second mounting groove 226 extends along the circumferential direction of the proximal connector 100. In other embodiments, the second mounting groove 226 can also extend along the axial direction of the proximal connector 100, or extend along other directions, as long as it can accommodate the pinch plate 420.

[0088] When the second shell 220 is closed relative to the first shell 210, the clasp plate 420 can be accommodated in the second mounting groove 226, so that the clasp plate 420 will not protrude outward in the radial direction of the proximal connector 100, and when the wire pulling device 1 pulls the connector 50 through the connecting mechanism 10, the connecting mechanism 10 will not scratch the human tissue, and at the same time, the overall structure can be made more compact and occupy less space. When the second shell 220 is closed relative to the first shell 210, the first mounting groove 217 is connected to the second mounting groove 226, so that when the locking assembly 400 locks the second shell 220 to the first shell 210, part of the locking plate 410 is located in the first mounting groove 217, and part of the locking plate 410 is located in the second mounting groove 226.

[0089] Optionally, the thickness of the locking plate 410 along the radial direction of the proximal connector 100 is matched with the depth of the depression of the first mounting groove 217. In this way, after the locking plate 410 is installed in the first mounting groove 217, the locking plate 410 will not protrude from the first outer peripheral surface 215. Optionally, the thickness of the pinch plate 420 along the radial direction of the proximal connector 100 is matched with the depth of the depression of the second mounting groove 226. In this way, after the pinch plate 420 is installed in the second mounting groove 226, the pinch plate 420 will not protrude from the second outer peripheral surface 225.

[0090] See also Figure 1 , Figure 2 and Figure 6 In one embodiment, the first outer peripheral surface 215 smoothly transitions to the outer peripheral surface of the second shell 220 (i.e., the second outer peripheral surface 225) when the second shell 220 is closed relative to the first shell 210. In other words, when the second shell 220 is closed relative to the first shell 210, the first shell 210 and the second shell 220 can form a complete cylindrical distal connector 200 without ridges at the connection, thereby avoiding scratching of human tissue.

[0091] See also Figure 6 , Figure 8 and Fig.17 In one embodiment, the second outer peripheral surface 225 further has a first avoidance groove 227 for a finger or an operating tool to extend into. The first avoidance groove 227 is recessed in the second outer peripheral surface 225, and the first avoidance groove 227 is connected to the second mounting groove 226. When the buckle portion 4203 is buckled on the outer peripheral surface of the second shell 220, the first avoidance groove 227 is close to the end of the buckle portion 4203 away from the rotating portion 4201. The operating tool can be a tool with a small end that is large enough to extend into the first avoidance groove 227, such as a screwdriver. After the buckle plate 420 is installed in the second mounting groove 226, the first avoidance groove 227 is located on the peripheral side of the buckle portion 4203.

[0092] The first avoidance groove 227 allows the operator's finger or operating tool to extend therein, so that the finger or operating tool can easily push the buckle portion 4203 of the buckle plate 420 to unlock the locking assembly 400. The second installation groove 226 can increase the space of the first avoidance groove 227, so that the operator's finger or operating tool can easily extend therein.

[0093] For example, when the locking assembly 400 needs to be unlocked, the operator's finger can be inserted into the first avoidance groove 227, and then into the buckle portion 4203 of the pinch plate 420. At this time, the finger can press the buckle portion 4203 of the pinch plate 420 to open the pinch plate 420 relative to the second housing 220, thereby unlocking the second housing 220 from the first housing 210, so as to facilitate the separation of the connection mechanism 10 from the connector 50.

[0094] See also Figure 6 and Fig.15 In one embodiment, the pinch plate 420 has an inner surface 424 facing the second mounting groove 226, and the inner surface 424 is provided with a second avoidance groove 423, and the second avoidance groove 423 is arranged at an end of the buckling portion 4203 away from the rotating portion 4201. The surface of the pinch plate 420 facing the second mounting groove 226 is the inner surface 424, and the second avoidance groove 423 is recessed in the inner surface 424. After the pinch plate 420 is installed in the second mounting groove 226, the second avoidance groove 423 is connected to the second mounting groove 226.

[0095] The second avoidance groove 423 can be inserted by the operator's finger or operating tool, so that the operator can apply force to the buckle portion 4203 of the buckle plate 420 to pull the buckle plate 420, thereby unlocking the locking assembly 400. When the locking assembly 400 needs to be unlocked, the operator's finger can be inserted into the second avoidance groove 423. At this time, the finger is located between the buckle portion 4203 of the buckle plate 420 and the second housing 220, which further facilitates the operator to apply force to pull the buckle portion 4203 of the buckle plate 420, so that the buckle plate 420 opens relative to the second housing 220, thereby unlocking the second housing 220 from the first housing 210, thereby facilitating the connection mechanism 10 and the connector 50 to be separated.

[0096] In this embodiment, the second housing 220 has a first avoidance groove 227, and the pinch plate 420 has a second avoidance groove 423. At this time, the first avoidance groove 227, the second avoidance groove 423 and the second installation groove 226 are connected, so that the operator's finger can be inserted into the second avoidance groove 423 through the first avoidance groove 227, so as to apply force to the buckle part 4203 of the pinch plate 420 to pull the pinch plate 420. In other embodiments, only the first avoidance groove 227 can be provided, and the operator's finger or operating tool can be inserted into the first avoidance groove 227 to pull the buckle part 4203 of the pinch plate 420. Alternatively, only the second avoidance groove 423 can be provided, and the operator's finger or operating tool can be inserted into the second avoidance groove 423 to pull the buckle part 4203 of the pinch plate 420.

[0097] See also Figures 13 to 15 In one embodiment, the locking assembly 400 further includes a first pin 430 and a second pin 440 extending axially along the proximal connector 100. The first pin 430 is rotatably disposed at the first end 411 and rotatably connected to the connecting portion 4202 of the pinch plate 420. The second pin 440 is rotatably disposed at the rotating portion 4201 and rotatably connected to the second housing 220.

[0098] The first end 411 of the locking plate 410 is provided with a first pin 430, and the first pin 430 extends along the axial direction of the proximal connector 100 and penetrates the connecting portion 4202 of the pinch plate 420, so as to rotatably connect the first end 411 of the locking plate 410 to the connecting portion 4202 of the pinch plate 420. The rotating portion 4201 of the pinch plate 420 is provided with a second pin 440 extending along the axial direction of the proximal connector 100, and the rotating portion 4201 of the pinch plate 420 is rotatably connected to the second housing 220 through the second pin 440.

[0099] The locking plate 410 is locked in the slot 216 through the buckle 413 to lock the locking plate 410 to the first housing 210. On this basis, the buckle plate 420 is buckled to the second housing 220. At this time, the locking assembly 400 is in a locked state and can lock the second housing 220 to the first housing 210. The buckle portion 4203 of the buckle plate 420 is buckled, and the rotating portion 4201 of the buckle plate 420 rotates around the second pin 440, so that the buckle plate 420 is opened relative to the first housing 210, and then the buckle plate 420 drives the locking plate 410 to disengage from the first housing 210 through the first pin 430, so that the buckle 413 is disengaged from the slot 216. At this time, the locking assembly 400 is in an unlocked state.

[0100] See also Figure 3 , Figure 7 and Fig.10 In one embodiment, a mounting portion 218 is convexly provided on the inner wall of the first housing 210, the mounting portion 218 is disposed at one end of the first housing 210 close to the proximal connector 100, and the second housing 220 is rotatably connected to the mounting portion 218. In other words, the first inner side surface 214 is convexly provided with the mounting portion 218, and the mounting portion 218 is located at the third connecting end 240 of the distal connector 200.

[0101] The side of the mounting portion 218 is rotatably connected to the second housing 220. Specifically, the side of the first housing 210 is rotatably connected to the side of the second housing 220, which can increase the volume of the receiving cavity 202 as much as possible to better accommodate the fixed connector 50.

[0102] See also Figure 1 and Figure 3 In one embodiment, the connection mechanism 10 further includes a fastener 300, which is passed through the proximal connection member 100 and fixed to the third connection end 240 of the distal connection member 200. For example, the fastener 300 passes through the second connection hole 102 and is installed to the third connection end 240 of the distal connection member 200 to achieve a fastened connection between the proximal connection member 100 and the distal connection member 200, improve the reliability of the connection between the proximal connection member 100 and the distal connection member 200, and prevent the proximal connection member 100 from being separated from the distal connection member 200 during the pulling process of the pull rod 60.

[0103] The fastener 300 can be assembled on the mounting portion 218 to fix the proximal connector 100 to the first housing 210. An assembly hole 2181 is provided in the middle of the mounting portion 218, and the assembly hole 2181 is coaxially arranged with the second connection hole 102, so that the fastener 300 can pass through the second connection hole 102 and be assembled into the assembly hole 2181 to fix the proximal connector 100 to the first housing 210, and then when the locking assembly 400 locks the second housing 220 to the first housing 210, the proximal connector 100 can be fixed to the third connection end 240 of the distal connector 200.

[0104] In one embodiment, the fastener 300 and the assembly hole 2181 are interference fit. In this way, the fastener 300 can be reliably assembled into the mounting hole 2182, thereby improving the reliability of the connection between the proximal connector 100 and the first housing 210. Of course, in other embodiments of the present application, the fastener 300 and the assembly hole 2181 can also be connected by thread or other connection methods, as long as a reliable connection between the proximal connector 100 and the first housing 210 can be achieved.

[0105] See also Figure 3 , Figure 7 and Figure 8 In one embodiment, the connection mechanism 10 further includes a sealing member 260, which is received in the receiving cavity 202. For example, the sealing member 260 is disposed on a side of the receiving cavity 202 close to the proximal connector 100 to be sealed and connected with the end of the connector 50. The sealing member 260 is disposed in the connection mechanism 10 and is located at the top of the receiving cavity 202. After the receiving cavity 202 receives the connector 50, the sealing member 260 can be sealed and disposed on the end of the connector 50. In this embodiment, the sealing member 260 is fixedly disposed on the first inner side surface 214 of the first housing 210. Of course, in other embodiments of the present application, the sealing member 260 can also be fixedly disposed on the second inner side surface 224 of the second housing 220.

[0106] When the second housing 220 is closed relative to the first housing 210, the sealing member 260 is disposed on a side of the receiving cavity 202 close to the proximal connector 100. When the connecting mechanism 10 is connected to the connector 50, the end of the connector 50 is received in the receiving cavity 202, and the outer shell surface 520 of the connector 50 abuts against the first inner side surface 214 and the second inner side surface 224, thereby fixing the connector 50. At the same time, the sealing member 260 is disposed at the end of the connector 50 and seals the port 530 of the connector 50 to prevent blood from entering the connector 50.

[0107] In one embodiment, the seal 260 is fixedly connected to the inner wall of at least one of the first shell 210 and the second shell 220, wherein the fixing method may be bonding, welding or other fixing methods. Exemplarily, the seal 260 is fixed to the first inner side surface 214 or the second inner side surface 224, or to the first inner side surface 214 and the second inner side surface 224 by gluing, so that the seal 260 can be reliably received in the receiving cavity 202, thereby improving the sealing effect of the seal 260 on the port 530 of the connector 50.

[0108] In one embodiment, the sealing member 260 is located on a side of the mounting portion 218 away from the proximal connector 100. The side of the mounting portion 218 away from the proximal connector 100 (i.e., the side of the sealing member 260 close to the fourth connector 250) has a mounting hole 2182. The side of the sealing member 260 close to the proximal connector 100 is provided with a mounting protrusion 261, that is, the side of the sealing member 260 facing the third connector 240 has a mounting protrusion 261, and the mounting protrusion 261 is embedded in the mounting hole 2182 to improve the reliability of the sealing member 260 being fixed to the first housing 210.

[0109] In one embodiment, the mounting protrusion 261 is bonded to the inner wall of the mounting hole 2182. That is, the mounting protrusion 261 is fixed to the inner wall of the mounting hole 2182 by gluing to improve the reliability of the sealing member 260 being fixed to the first housing 210. It is worth noting that the structural form of the sealing member 260 is not limited in principle, as long as the sealing member 260 can be fixed to the first inner side surface 214 and seal the port 530 of the connector 50.

[0110] See also Fig.16 In this embodiment, the seal 260 is provided with a central boss 262 and an annular sealing portion 263 arranged around the central boss 262. Exemplarily, the central boss 262 is arranged at the end of the seal 260 away from the proximal connector 100. The central boss 262 can be plugged and matched with the port 530 of the connector 50, and the annular sealing portion 263 can be sealed against the end face 501 of the connector 50, wherein the end face 501 of the connector 50 is arranged around the port 530. Through the plug-in cooperation between the central boss 262 and the port 530 of the connector 50, and the abutment between the annular sealing portion and the end face 501 of the connector 50, the seal 260 can seal the port 530 to prevent blood from entering the interior of the connector 50. In this embodiment, the annular sealing portion 263 is a step surface surrounding the central boss 262. In other embodiments, the annular sealing portion 263 can also be a sealing ring surrounding the central boss 262.

[0111] The central boss 262 is roughly cylindrical. The central boss 262 is provided with a central groove 2621, which is formed by the inward depression of the end surface of the central boss 262, so that the central boss 262 can be deformed inward toward the central axis of the central boss 262 under the action of external force, so that the central boss 262 can be adapted to the port 530 of the connector 50 with a smaller size, avoiding the situation that the port 530 is too small due to processing errors, so that the sealing member 260 cannot be plugged and matched with the port 530 of the connector 50. Among them, the inward depression of the end surface of the central boss 262 refers to the depression of the end surface of the central boss 262 toward the side of the proximal connector 100.

[0112] In this embodiment, an annular groove 264 is provided on the outer periphery of the seal 260, and the annular groove 264 is arranged around the central axis of the central boss 262, so that the seal 260 is easier to deform under the action of external force, so as to better fit with the end face 501 of the connector 50, thereby improving the sealing performance of the connector 50.

[0113] The material of the sealing member 260 is silicone or rubber, so that the sealing member 260 can be deformed under the action of external force to seal the connector 50 .

[0114] See also Figure 1 and Figure 3 When the connection mechanism 10 of the present application is connected to the connector 50, the second housing 220 rotates relative to the first housing 210 so that the second housing 220 opens relative to the first housing 210, the end of the connector 50 is placed between the first housing 210 and the second housing 220, and the matching portion 510 of the connector 50 corresponds to the engaging portion 201 of the distal connector 200. Subsequently, the second housing 220 rotates relative to the first housing 210 so that the second housing 220 closes relative to the first housing 210. At this time, the first housing 210 and the second housing 220 are surrounded by a receiving cavity 202, and the engaging portion 201 and the matching portion 510 cooperate with each other, and the connector 50 is received through the receiving cavity 202.

[0115] The buckle 413 of the first end 411 of the locking plate 410 is placed in the buckle slot 216, and the second end 412 of the locking plate 410 rotates around the first pin 430 to buckle in the first installation slot 217. On this basis, the buckle plate 420 rotates relative to the second housing 220 through the second pin 440 to buckle in the second installation slot 226. In this way, the locking assembly 400 is in a locked state, and the locking assembly 400 can lock the second housing 220 to the first housing 210. While the receiving cavity 202 receives the connector 50, the sealing member 260 seals the end of the connector 50 to seal the port 530 of the connector 50.

[0116] In this way, the distal connector 200 can be stably connected to the connector 50, and the distal connector 200 can be prevented from being separated from the connector 50. Since the connecting mechanism 10 has been connected to the pull rod 60 through the proximal connector 100, when the connecting mechanism 10 is connected to the connector 50 outside the body, the pull rod 60 can pull the connector 50 through the connecting mechanism 10, so that the connector 50 enters the body through the opening of the human tissue, and then is pulled out of the body through the perforation, completing the installation operation of the connector 50.

[0117] When the connector 50 is pulled out of the body, the connection mechanism 10 needs to be separated from the connector 50 so that the connector 50 is electrically connected to the external controller. The operator's finger extends into the second escape groove 423 through the first escape groove 227, and applies force to the buckle portion 4203 of the buckle plate 420 to buckle the buckle plate 420, and the rotating portion 4201 of the buckle plate 420 rotates around the second pin 440 to open the buckle plate 420 relative to the second housing 220.

[0118] During the rotation of the pinch plate 420, the pinch plate 420 drives the locking plate 410 to rotate through the first pin 430, so that the buckle 413 of the second end 412 of the locking plate 410 is disengaged from the slot 216, so that the locking plate 410 is opened relative to the first housing 210. In this way, the locking assembly 400 is unlocked, so that the second housing 220 is unlocked relative to the first housing 210. Subsequently, the second housing 220 rotates relative to the first housing 210, so that the second housing 220 is opened relative to the first housing 210. At this time, the connector 50 can be separated from the first housing 210 and the second housing 220, so that the connection mechanism 10 and the connector 50 are separated.

[0119] Compared to the traditional rotating connection mechanism to separate the connection mechanism from the connector, the present application rotates the second shell 220 relative to the first shell 210 to close or open the first shell 210 and the second shell 220, thereby avoiding rotational slippage, facilitating the connection and separation of the connection mechanism 10 and the connector 50, shortening the time for connection and separation of the connection mechanism 10 and the connector 50, and providing higher operational safety.

[0120] See also Figure 1 , Fig.17 and Fig.18 The present application also provides a wire pulling device 1, which includes a handle 70, a pull rod 60 and a connecting mechanism 10 as in any of the above embodiments, wherein the handle 70 is disposed at one end of the pull rod 60, and the other end of the pull rod 60 is detachably connected to a proximal connecting member 100 of the connecting mechanism 10. Fig.17 As shown, the top end of the pull rod 60 is detachably provided with a handle 70, and the bottom end of the pull rod 60 is detachably mounted with a connecting mechanism 10. In this way, the pull rod 60 can be connected to the connector 50 through the connecting mechanism 10, and then the connector 50 can be pulled out of the body.

[0121] See also Fig.17 and Fig.18 In one embodiment, the pull rod 60 includes a rod portion 610 and a connector 620. The connector 620 and the handle 70 are disposed at opposite ends of the rod portion 610. The connector 620 is detachably connected to the proximal connector 100. The rod portion 610 is made of stainless steel. The rod portion 610 can be bent to pass through the perforation of human tissue and extend into the body, and then extend out of the body through the opening of the human tissue. Fig.17 and Fig.18 In the embodiment, a connector 620 is disposed at the bottom of the rod 610, and is detachably connected to the proximal connector 100 through the connector 620, such as by threaded connection or snap connection, etc. The top of the rod 610 is detachably connected to the handle 70, such as by threaded connection or snap connection, etc.

[0122] See also Fig.17 and Fig.18 In one embodiment, the wire pulling device 1 further includes a cutter head 80, which is detachably disposed at an end of the pull rod 60 away from the handle 70. The cutter head 80 is detachably connected to the connector 620, and the cutter head 80 can form a perforation in human tissue so that the pull rod 60 can pass through the perforation and extend into the body.

[0123] When the connector 50 needs to be pulled out of the body, the blade head 80 is installed on the connector 620. The blade head 80 forms a perforation in the human tissue, and the blade head 80 drives the pull rod 60 so that the pull rod 60 passes through the perforation from the outside of the body into the outside of the body, and then extends out of the body through the opening of the human tissue. Subsequently, the blade head 80 is removed from the connector 620, and the proximal connector 100 is connected to the connector 620 to install the connection mechanism 10 on the pull rod 60.

[0124] Then, the connection mechanism 10 is connected to the connector 50 placed outside the body through the opening. After the connection is completed, the pull rod 60 is pulled, and the pull rod 60 drives the connector 50 to move through the connection mechanism 10, and the connector 50 is pulled from the opening into the body, and then pulled out of the body through the perforation. When the installation operation of the connector 50 is completed, the connection mechanism 10 is separated from the connector 50, and then the connector 50 can be electrically connected to the external controller.

[0125] 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.

[0126] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A connecting mechanism, characterized in that: include: A proximal connecting member, the proximal connecting member having a first connecting end and a second connecting end opposite to each other, the first connecting end being connectable to a pull rod of a wire pulling device; A distal connecting piece, the distal connecting piece is connected to the second connecting end, the distal connecting piece has a receiving cavity, the receiving cavity can receive at least part of the connector of the blood pump, and the cavity wall of the receiving cavity can be engaged with the connector so that the distal connecting piece is connected to the connector; the distal connecting piece includes a first shell and a second shell, the first shell is connected to the proximal connecting piece, one side of the second shell is rotatably connected to the first shell, and the other side of the second shell can be opened or closed relative to the first shell; wherein the second shell is closed relative to the first shell so that the first shell and the second shell enclose the receiving cavity, and the second shell is opened relative to the first shell so that the distal connecting piece is separated from the connector; as well as A locking assembly, wherein the locking assembly can lock the first shell and the second shell to keep the second shell closed relative to the first shell.

2. The connection mechanism according to claim 1, characterized in that: The first shell has a first lug, the second shell has a second lug, and the distal connector further includes a connecting shaft, the connecting shaft is passed through the first lug and the second lug, and the connecting shaft can rotate relative to at least one of the first lug and the second lug, so that the second shell can rotate relative to the first shell, and the second shell can be opened or closed relative to the first shell; And / or, the second housing has a rotation axis relative to the first housing, and the extension direction of the rotation axis is parallel to the axial direction of the proximal connecting member; And / or, the locking assembly is disposed on at least one of the first shell and the second shell.

3. The connection mechanism according to claim 1, characterized in that: The locking assembly includes a buckle plate and a locking plate, the buckle plate includes a rotating part, a connecting part and a buckling part, the connecting part is located between the rotating part and the buckling part, and is connected to both the rotating part and the buckling part, the rotating part is rotatably connected to the second shell, and the buckling part can be buckled on the outer circumferential surface of the second shell; the locking plate has a first end and a second end relative to each other, the first end is rotatably connected to the connecting part, the second end is provided with a buckle, the first shell is provided with a slot, and the buckle can be buckled with the slot; wherein, the buckle is buckled on the outer circumferential surface of the second shell, and when the buckle is engaged with the slot, the locking assembly locks the first shell and the second shell.

4. The connection mechanism according to claim 3, characterized in that: The outer circumferential surface of the first shell has a first mounting groove, the locking plate can be accommodated in the first mounting groove, and the card groove is arranged on the bottom surface of the first mounting groove; the outer circumferential surface of the second shell has a second mounting groove, the buckle plate can be accommodated in the second mounting groove, and the first mounting groove and the second mounting groove can be connected when the second shell is closed relative to the first shell.

5. The connection mechanism according to claim 4, characterized in that: The outer circumferential surface of the second shell also has a first avoidance groove for a finger or an operating tool to extend into, the first avoidance groove is connected to the second mounting groove, and when the snap-fitting portion is snapped onto the outer circumferential surface of the second shell, the first avoidance groove is close to an end of the snap-fitting portion away from the rotating portion; and / or the buckle plate has an inner surface facing the second mounting groove, the inner surface is provided with a second avoidance groove for a finger or an operating tool to extend into, and the second avoidance groove is arranged at an end of the snap-fitting portion away from the rotating portion.

6. The connection mechanism according to any one of claims 1 to 5, characterized in that: A mounting portion is protruding on the inner wall of the first shell, and the mounting portion is arranged at one end of the first shell close to the proximal connecting piece; wherein the side portion of the mounting portion is rotatably connected to the second shell; an assembly hole is provided in the middle portion of the mounting portion, and the connecting mechanism also includes a fastener, which is passed through the second connecting end of the proximal connecting piece and assembled in the assembly hole.

7. The connection mechanism according to any one of claims 1 to 5, characterized in that: The connection mechanism further includes a sealing member, which is received in the receiving cavity and can be sealed and connected to the end of the connector, wherein: The sealing member is fixedly connected to the inner wall of at least one of the first shell and the second shell; and / or the first shell includes a mounting portion protruding from its inner wall, the mounting portion is arranged at one end of the first shell close to the proximal connecting member, the mounting portion has a mounting hole on the side away from the proximal connecting member, and the sealing member is provided with a mounting protrusion, which is embedded in the mounting hole.

8. The connection mechanism according to any one of claims 1 to 5, characterized in that: The connection mechanism also includes a seal received in the receiving cavity, the seal is provided with a central boss and an annular sealing portion arranged around the central boss, the central boss can be plugged into and matched with the port of the connector, and the annular sealing portion can be sealed against the end face of the connector.

9. The connection mechanism according to claim 8, characterized in that: The center boss is provided with a center groove, which is formed by the inward depression of the end surface of the center boss; and / or, the outer periphery of the seal is provided with an annular groove, which is arranged around the central axis of the center boss; and / or, the material of the seal is silicone or rubber.

10. A wire pulling device, characterized in that: It comprises a pull rod and a connecting mechanism as claimed in any one of claims 1 to 9, wherein the pull rod is detachably connected to the proximal connecting piece.

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