Connection structure and wire-pulling device

Abstract

The present invention provides a connection structure and a wire pulling device. The connection structure includes a first connector and a second connector. The first connector is provided with a through connection hole; the second connector includes a connection mechanism, a connecting rod and a limit cap. The connection mechanism is used for detachably connecting with a connector. The maximum outer diameter of the connection mechanism is greater than the aperture of the connection hole. The connecting rod is inserted through the connection hole, and the connecting rod can swing relative to the central axis of the connection hole. One end of the connecting rod is connected to the connection mechanism, and the limit cap is connected to the other end of the connecting rod. The limit cap and the connection mechanism can jointly prevent the connecting rod from disengaging from the connection hole. The connecting rod of this connection structure can swing relative to the central axis of the connection hole. Therefore, the first connector and the second connector can move relative to each other flexibly, and the operation is more flexible.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a connection structure and a wire pulling device. Background Art

[0002] Generally, after implanting a blood pump into the body, it is necessary to pull out the connector of the blood pump outside the body so that the blood pump is connected to an external controller. If the operator directly pulls the connector out of the body by hand, it is easy to cause human infection. To solve this problem, the operator will use an auxiliary tool to pass through the tissue to pull out the connector of the blood pump. However, the current auxiliary tools have the problem of inflexible operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a connection structure and a wire pulling device with relatively flexible operation to facilitate the pulling work of the blood pump connector.

[0004] One object of the present invention is to provide a connection structure, including:

[0005] A first connecting member, which is provided with a connection hole;

[0006] A second connecting member, including a connection mechanism, a connecting rod and a limiting cap. The connection mechanism is used for detachably connecting with the connector. The maximum outer diameter of the connection mechanism is larger than the aperture of the connection hole. The connecting rod passes through the connection hole, and the connecting rod can swing relative to the central axis of the connection hole. One end of the connecting rod is connected to the connection mechanism, and the limiting cap is connected to the other end of the connecting rod. The limiting cap and the connection mechanism together prevent the connecting rod from disengaging from the connection hole.

[0007] In one embodiment, both the connection mechanism and the limiting cap are fixedly connected to the connecting rod. The limiting cap is provided with an external thread, and the hole wall of the connection hole is provided with a mating thread adapted to the external thread;

[0008] Or, the limiting cap is an elastic member. The maximum outer diameter of the limiting cap is larger than the aperture of the connection hole to prevent the connecting rod from disengaging from the connection hole. The limiting cap can undergo elastic deformation, and when the limiting cap undergoes elastic deformation, it can pass through the connection hole;

[0009] Or, at least one of the connection seat and the limiting cap is detachably connected to the connecting rod.

[0010] In one embodiment, the connection mechanism includes a connection seat and a connection head. The connection seat is fixedly connected to the end of the connecting rod away from the limiting cap. The maximum outer diameter of the connection seat is larger than the aperture of the connection hole. The connection head is installed on the connection seat, and the connection head can be detachably connected to the connector.

[0011] In one embodiment, the connecting base includes a cylindrical structure with an open end and a closed end. One end of the connecting rod away from the limiting cap is fixedly connected to the closed end of the cylindrical structure, and at least a part of the connecting head is received in the cylindrical structure.

[0012] In one embodiment, the connecting head includes a connecting body and a rotating member rotatably connected to the connecting body. The connecting body is fixedly connected to the connecting base, and the connecting body can be detachably connected to the connector. The rotating member is provided with a engaging protrusion that can engage with the engaging groove of the connector. The rotating member can rotate relative to the connecting body to engage or disengage the engaging protrusion with the engaging groove.

[0013] And / or, the connecting head is a waterproof connector that can be male-female paired with the connector.

[0014] In one embodiment, the first connecting member includes a cylindrical portion having a closed end and an open end. The connecting hole is opened at the closed end, and the limiting cap is received in the cylindrical portion.

[0015] Another object of the present invention is to provide a wire pulling device, including a pull rod and the connecting structure as described above. The pull rod can be detachably connected to the first connecting member.

[0016] In one embodiment, the wire pulling device further includes a cutter head. The cutter head includes a conical portion and an extension portion extending from the large end of the conical portion in a direction away from the conical portion. The extension portion can be detachably connected to the first connecting member.

[0017] In one embodiment, a fixing groove is opened on the cutter head. The fixing groove extends from the end face of the extension portion away from the conical portion towards the conical portion. A side hole extending radially is also opened on the cutter head. The side hole penetrates the side wall of the cutter head and communicates with the fixing groove, and the hole wall of the side hole and the bottom wall of the fixing groove are co-arc surfaces. Wherein, the pull rod can be partially received in the fixing groove and is detachably connected to the cutter head.

[0018] In one embodiment, a threaded hole is opened on the pull rod. The wire pulling device further includes a handle. The handle can pass through the threaded hole and be threadedly connected to the pull rod.

[0019] And / or, the first connecting member can be threadedly connected to the pull rod.

[0020] The technical effect of the present invention is that when the connecting rod is inserted into the connecting hole, the first connecting member is located between the connecting mechanism and the limiting cap. The limiting cap and the connecting mechanism can jointly prevent the connecting rod from disengaging from the connecting hole. That is to say, both the connecting seat and the limiting cap play a limiting role on the first connecting member to prevent the separation of the first connecting member and the second connecting member. Since the connecting rod can swing relative to the central axis of the connecting hole, the first connecting member and the second connecting member can move relative to each other flexibly. This not only facilitates the connection operation between the pull rod for pulling and the first connecting member, but also facilitates the connection operation between the second connecting member and the connector of the blood pump located in the body, making the operation more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention or the prior art. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the connection structure provided by the embodiment of the present invention;

[0023] Figure 2 is Figure 1 an exploded view of the connection structure shown omitting the connector head;

[0024] Figure 3 is Figure 1 an exploded view of the second connecting member of the connection structure shown;

[0025] Figure 4 is Figure 1 a cross-sectional view of the first connecting member and the second connecting member of the connection structure shown omitting the connector head;

[0026] Figure 5 is Figure 3 a structural schematic diagram of the connector head of the second connecting member shown;

[0027] Figure 6 is Figure 5 a schematic diagram of another angle of the connector head;

[0028] Figure 7 is a structural schematic diagram of an embodiment of the connector of the blood pump;

[0029] Figure 8 is a structural schematic diagram of a wire pulling device of the present invention;

[0030] Figure 9 is Figure 8 an exploded view;

[0031] Figure 10 is Figure 8 a schematic structural view of the cutter head of the wire-pulling device;

[0032] Figure 11 is Figure 10 the front view.

[0033] Description of the reference numerals in the drawings:

[0034] 10. Connection structure; 101. Connection hole; 11. First connecting member; 111. Matching thread; 112. Internal thread; 12. Second connecting member; 121. Limiting cap; 1211. External thread; 122. Connecting rod; 123. Connecting seat; 1231. Engaging protrusion; 124. Connecting head; 1241. Connecting body; 1242. Rotating member; 1243. Ring-shaped protrusion; 1244. Engaging lug; 125. Connecting mechanism; 1201. Guide groove; 1202. Limiting groove; 20. Pull rod; 201. Threaded hole; 21. Rod portion; 22. Head portion; 23. Handle portion; 30. Handle; 40. Cutter head; 41. Conical portion; 42. Extension portion; 401. Fixed groove; 402. Side hole; 90. Connector; 901. Socket; 902. Engaging groove; 91. Insertion end. Detailed implementation manners

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation to the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "head end", "tail end", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0037] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] Please refer to Figure 1 , the present invention provides a connection structure 10, which can be used to pull out the connector 90 of the blood pump (please refer to Figure 8 ) during the operation of pulling it out of the body. The connection structure 10 can connect the connector 90 of the blood pump and the pull rod 20, so as to facilitate pulling out the connector 90 of the blood pump out of the body through the pull rod 20. Among them, the pull rod 20 is a component that can penetrate through human tissues and is used for the operator to apply a pulling force outside the body to achieve the pulling operation. The connection structure 10 includes a first connecting member 11 and a second connecting member 12.

[0040] Please refer to Figure 2 , the first connecting member 11 is provided with a connection hole 101. Specifically, the first connecting member 11 includes a cylindrical portion, the cylindrical portion has a closed end and an open end, and the connection hole 101 is opened at the closed end. Among them, the connection hole 101 communicates with the inner hole of the cylindrical portion. In the illustrated embodiment, the first connecting member 11 is the cylindrical portion. It can be understood that in other embodiments, the first connecting member 11 may further include other structures in addition to the cylindrical portion, or the first connecting member 11 may not include the cylindrical portion, and the first connecting member 11 may be other structures having the connection hole 101. The cylindrical portion is used to connect with the pull rod 20, specifically, it can be connected by threads, for example, by providing internal threads to be screwed with the pull rod 20 or by providing external threads to be screwed with the pull rod 20.

[0041] In one embodiment, the material of the cylindrical portion is stainless steel, so that the cylindrical portion not only has good strength but also has a long service life.

[0042] Please refer to Figure 3 and Figure 4, the second connecting member 12 includes a connecting mechanism 125, a connecting rod 122 and a limiting cap 121. The connecting mechanism 125 is used for detachably connecting with the connector 90 of the blood pump. The maximum outer diameter of the connecting mechanism 125 is greater than the aperture of the connecting hole 101. The connecting rod 122 passes through the connecting hole 101, and the connecting rod 122 can swing relative to the central axis of the connecting hole 101. One end of the connecting rod 122 is connected to the connecting mechanism 125, and the limiting cap 121 is connected to the other end of the connecting rod 122. The limiting cap 121 and the connecting mechanism 125 can jointly prevent the connecting rod 122 from detaching from the connecting hole 101. Specifically, the maximum outer diameter of the connecting rod 122 is smaller than the aperture of the connecting hole 101, and the length of the connecting rod 122 is greater than the depth of the connecting hole 101. In this way, when the connecting rod 122 passes through the connecting hole 101, the first connecting member 11 is located between the connecting mechanism 125 and the limiting cap 121, and the connecting rod 122 has a movable space both axially and radially to realize swinging relative to the central axis of the connecting hole 101. The connecting mechanism 125 and the limiting cap 121 play a limiting role on the first connecting member 11 to prevent the first connecting member 11 from separating from the second connecting member 12.

[0043] The connecting rod 122 can be prismatic, cylindrical, or elliptical cylindrical, that is, its cross-section along its extending direction is square or rectangular. The connecting rod 122 can also be frustum-shaped, conical frustum-shaped, or elliptical frustum-shaped, that is, its cross-section along its extending direction is trapezoidal. The maximum outer diameter of the connecting rod 122 refers to the maximum value among all the distances between each point on the outer wall of the connecting rod 122 and other points on the cross-section where the point is located. Specifically, in the illustrated embodiment, the connecting rod 122 is a smooth cylindrical shape. The limiting cap 121 is received in the cylindrical portion.

[0044] After the blood pump is implanted into the human body, it is necessary to pull out the connector 90 of the blood pump out of the body to be electrically connected to the connector 90 of the external controller, so as to realize the electrical connection between the controller and the blood pump. In this embodiment, the pull rod 20 and the connector 90 of the blood pump can be respectively connected to the first connecting member 11 and the second connecting member 12 (please refer to Figure 8 ), and by pulling the pull rod 20, the connector 90 is pulled out of the body. Since the connecting rod 122 can swing relative to the central axis of the connecting hole 101, the first connecting member 11 and the second connecting member 12 can move relative to each other flexibly, which is more flexible. This not only facilitates the connection operation between the pull rod 20 for pulling and the first connecting member 11, but also facilitates the connection operation between the second connecting member 12 and the connector 90 of the blood pump located in the body, and the operation is more flexible.

[0045] Please refer to Figure 4 , in the illustrated embodiment, both the connecting mechanism 125 and the limiting cap 121 are fixedly connected to the connecting rod 122. More specifically, please refer to Figure 3, the connecting mechanism 125 includes a connecting seat 123 and a connecting head 124. The connecting seat 123 is fixedly connected to one end of the connecting rod 122 away from the limiting cap 121. The maximum outer diameter of the connecting seat 123 is greater than the aperture of the connecting hole 101. The connecting head 124 is installed on the connecting seat 123 and can be detachably connected to the connector 90. In this way, the connecting seat 123 and the connector 90 can be connected through the connecting head 124. Specifically, the connecting seat 123, the connecting rod 122 and the limiting cap 121 are fixedly connected. More specifically, the connecting seat 123, the connecting rod 122 and the limiting cap 121 are integrally formed. In one embodiment, the materials of the connecting seat 123, the connecting rod 122 and the limiting cap 121 are stainless steel, so that the second connecting member 12 not only has good strength but also has a long service life.

[0046] In the illustrated embodiment, the connecting seat 123 includes a cylindrical structure with one end open and the other end closed. One end of the connecting rod 122 away from the limiting cap 121 is fixedly connected to the closed end of the cylindrical structure, and at least a part of the connecting head 124 is received in the cylindrical structure. Specifically, in the illustrated embodiment, the connecting seat 123 is the cylindrical structure. It can be understood that in other embodiments, the connecting seat 123 may further include other structures other than the cylindrical structure, or the connecting seat 123 may also be other structures that do not include the cylindrical structure.

[0047] Please refer to Figure 5 , specifically, the connecting head 124 includes a connecting body 1241. The connecting body 1241 is fixedly connected to the connecting seat 123 and can be detachably connected to the connector 90 of the blood pump.

[0048] Please refer to again Figure 3 and Figure 4 , the connecting seat 123 further includes a clamping protrusion 1231 provided on the inner wall of the cylindrical structure. The connecting body 1241 is clamped with the clamping protrusion 1231.

[0049] A guiding groove 1201 and a limiting groove 1202 are formed on the side wall of the connecting body 1241. The limiting groove 1202 extends along the circumferential direction of the connecting body 1241, and the guiding groove 1201 extends along the axial direction of the connecting body 1241 and is communicated with the limiting groove 1202. The clamping protrusion 1231 is clamped with the limiting groove 1202 to prevent the connecting body 1241 from separating from the connecting seat 123, and the clamping protrusion 1231 can slide from the guiding groove 1201 into the limiting groove 1202. Specifically, the width of the guiding groove 1201 along the circumferential direction of the connecting body 1241 is not less than the width of the clamping protrusion 1231 along the circumferential direction of the connecting seat 123, and the width of the limiting groove 1202 along the axial direction of the connecting body 1241 is not less than the width of the clamping protrusion 1231 along the axial direction of the connecting seat 123, so that the clamping protrusion 1231 can slide from the guiding groove 1201 into the limiting groove 1202.

[0050] By adopting the connecting body 1241 and the connecting seat 123 with the above structure, the assembly of the connecting body 1241 and the connecting seat 123 can be simply realized. Then, the assembly method of the connecting body 1241 and the connecting seat 123 is as follows: First, align the engaging protrusion 1231 with the guiding groove 1201, and then insert the connecting body 1241 into the connecting seat 123. At this time, the engaging protrusion 1231 slides along the extending direction of the guiding groove 1201 into the limiting groove 1202. Rotate the connecting body 1241, and the engaging protrusion 1231 slides along the extending direction of the limiting groove 1202 until the engaging protrusion 1231 is misaligned with the guiding groove 1201, that is, the engagement between the connecting body 1241 and the connecting seat 123 is realized. In this way, when axially pulling the connecting body 1241 and / or the connecting seat 123, the groove wall of the limiting groove 1202 abuts against the engaging protrusion 1231 to limit the axial movement of the connecting body 1241 and prevent the connecting body 1241 from separating from the connecting seat 123. Preferably, the engaging protrusion 1231 is in contact with both side walls of the limiting groove 1202. Among them, a plurality of engaging protrusions 1231 can be provided at intervals. Correspondingly, a plurality of guiding grooves 1201 are provided, and the positions of the plurality of guiding grooves 1201 correspond to the positions of the plurality of engaging protrusions 1231 respectively.

[0051] More specifically, in this embodiment, the connecting body 1241 has a fixed end fixedly connected to the connecting seat 123 and a connecting end that can be detachably connected to the connector 90. Two annular protrusions 1243 are provided circumferentially on the outer wall of the connecting body 1241. The two annular protrusions 1243 are arranged at intervals along the axis. A limiting groove 1202 is formed between the two annular protrusions 1243. The guiding groove 1201 is opened on the annular protrusion 1243 near the fixed end of the connecting body 1241 and penetrates through both side walls of the annular protrusion 1243 axially.

[0052] To further fasten the connection between the connecting body 1241 and the connecting seat 123, adhesive can be applied to the fixed end and / or the connecting seat 123, so that after the connecting body 1241 and the connecting seat 123 are engaged by the engaging protrusion 1231, they are adhered by the adhesive to prevent the connecting body 1241 from separating from the connecting seat 123, especially reducing the risk of accidental loosening during its use.

[0053] Specifically, the connecting body 1241 is detachably connected to the connector 90 by means of plugging.

[0054] To further prevent the separation of the connecting head 124 from the connector 90 of the blood pump, especially the separation of the connecting head 124 and the connector 90 connected by means of plugging, the connecting head 124 further includes a rotating member 1242 rotatably connected to the connecting body 1241. The rotating member 1242 is provided with an engaging groove 902 that can be engaged with the connector 90 (please refer toFigure 7 , generally, the connector 90 of the blood pump has a plug end 91, and a jack 901 for electrically connecting with another connector is provided on the plug end 91. The connecting end of the connecting body 1241 can be inserted into the jack 901 to achieve the plug connection between the connecting body 1241 and the connector 90. A engaging groove 902 is usually formed on the outer edge of the plug end 91 of the connector 90, and the engaging groove 902 is a groove for engaging with another connector. Usually, the engaging groove 902 is hook-shaped. A engaging projection 1244 for engaging, and the rotating member 1242 can rotate relative to the connecting body 1241 to engage or disengage the engaging projection 1244 with the engaging groove 902. Specifically, the rotating member 1242 is rotatably sleeved outside the connecting body 1241 and is spaced from the outer wall of the connecting end to form a gap for receiving the outer edge of the plug end 91. The engaging projection 1244 is provided on the inner wall of the rotating member 1242.

[0055] When connecting the connector 124 to the connector 90 of the blood pump, rotate the rotating member 1242 to align the engaging projection 1244 with the engaging groove 902, and then insert the connecting end of the connecting body 1241 into the jack 901 of the connector 90. At this time, the engaging projection 1244 also slides into the engaging groove 902. Release the rotating member 1242, and the rotating member 1242 resets. At this time, the engaging projection 1244 slides into the hook-shaped portion of the engaging groove 902 and engages with the engaging groove 902 to prevent the connector 124 from disengaging from the connector 90.

[0056] Furthermore, the connector 124 also has a waterproof structure. When the connector 124 is connected to the connector 90, the waterproof structure can prevent blood from entering the connector 90 and avoid the situation of poor connection of the connector 90.

[0057] Specifically, the connector 124 is a waterproof connector that can be male-female paired with the connector 90.

[0058] Furthermore, the swing angle of the connecting rod 122 is less than or equal to 40°. That is to say, the second connecting member 12 can swing relative to the first connecting member 11 within a range of 40° with respect to the central axis of the connecting hole 101.

[0059] Please refer to again Figure 3 , the maximum outer diameter of the limiting cap 121 is smaller than the inner diameter of the cylindrical portion. In this way, when the limiting cap 121 passes through the connecting hole 101 and enters the cylindrical portion, there is a certain movement space between the limiting cap 121 and the inner wall of the cylindrical portion, so as to facilitate the limiting cap 121 to shake in the inner hole of the cylindrical portion. Preferably, in the axial direction of the cylindrical portion, the length of the cylindrical portion is greater than the length of the limiting cap 121 so that the limiting cap 121 is completely received in the cylindrical portion and is protected from external bumps.

[0060] In the illustrated embodiment, in order to prevent the connecting rod 122 from disengaging from the connecting hole 101 while the limiting cap 121 and the connecting mechanism 125 work together, and to facilitate the assembly of the first connecting member 11 and the second connecting member 12, please refer to Figure 2 and Figure 3 , an external thread 1211 is provided on the limiting cap 121, and a mating thread 111 adapted to the external thread 1211 is provided on the hole wall of the connecting hole 101. Specifically, the limiting cap 121 is cylindrical and coaxially arranged with the connecting rod 122, and the external thread 1211 is provided in the circumferential direction of the limiting cap 121. Then, the maximum outer diameter of the limiting cap 121 refers to the outer diameter of the external thread 1211. Among them, the aperture of the connecting hole 101 refers to the inner diameter of the mating thread 111. Through the cooperation of the mating thread 111 and the external thread 1211, the limiting cap 121 can pass through the connecting hole 101 from the outside of the cylindrical portion and be received in the inner hole of the cylindrical portion, so that the connecting rod 122 passes through the connecting hole 101, and the movable connection between the first connecting member 11 and the second connecting member 12 is realized.

[0061] Then, the assembly operation of the first connecting member 11 and the second connecting member 12 can be as follows:

[0062] Align the central axis of the limit cap 121 with the central axis of the connection hole 101, and then rotate one of the first connecting member 11 and the second connecting member 12 so that the external thread 1211 of the limit cap 121 is in threaded engagement with the mating thread 111 of the first connecting member 11. During the threaded engagement process, the limit cap 121 gradually passes through the connection hole 101 until the external thread 1211 of the limit cap 121 disengages from the mating thread 111 of the first connecting member 11. At this time, the connecting rod 122 passes through the connection hole 101, and the external thread 1211 of the limit cap 121 abuts against the edge of the connection hole 101, thereby preventing the limit cap 121 from passing out of the connection hole 101, realizing the connection between the first connecting member 11 and the second connecting member 12. If the first connecting member 11 and the second connecting member 12 are to be separated, it is also necessary to first align the central axis of the limit cap 121 with the central axis of the connection hole 101, and then rotate one of the first connecting member 11 and the second connecting member 12 in the reverse direction so that the external thread 1211 of the limit cap 121 is again in threaded engagement with the mating thread 111 of the connection hole 101. During the threaded engagement process, the limit cap 121 gradually passes out of the connection hole 101 until the external thread 1211 of the limit cap 121 disengages from the mating thread 111 of the first connecting member 11. At this time, the limit cap 121 disengages from the connection hole 101, and the second connecting member 12 is separated from the first connecting member 11. It can be seen that the removal of the limit cap 121 from the connection hole 101 requires cumbersome and complex operation steps, and the limit cap 121 and the first connecting member 11 cannot move axially and disengage from the connection hole 101 without alignment and rotation. That is to say, unless manually and deliberately operated, the limit cap 121 will not accidentally disengage from the connection hole 101, with high reliability and a small risk of disconnection between the first connecting member 11 and the second connecting member 12. For the first connecting member 11 and the second connecting member 12 connected in this way, rigid materials with good strength, such as stainless steel, can be used. This not only makes the connection structure 10 have a long service life and is not prone to problems such as breakage, reducing the surgical risk, but also enables the replacement of the first connecting member 11 or the second connecting member 12 to be convenient, reducing resource waste. In addition, with this connection method, the limit cap 121, the connection seat 123 and the connecting rod 122 can be of an integrally formed structure, which not only simplifies the manufacturing and assembly of the connection structure 10, but also reduces the risk of loosening compared with the form of assembling individual small components together, further reducing the surgical risk.

[0063] It should be noted that, in order to prevent the connecting rod 122 from disengaging from the connecting hole 101 while the limiting cap 121 and the connecting mechanism 125 work together, and to facilitate the assembly of the first connecting member 11 and the second connecting member 12, the above method is not limited. In other embodiments, the limiting cap 121 is fixedly connected to the connecting rod 122 and is an elastic member. The maximum outer diameter of the limiting cap 121 is greater than the aperture of the connecting hole 101 to prevent the connecting rod 122 from disengaging from the connecting hole 101. The limiting cap 121 can undergo elastic deformation, and when the limiting cap 121 undergoes elastic deformation, it can pass through the connecting hole 101. At this time, the limiting cap 121 is made of an elastic material. The limiting cap 121 has a compressed state in which it is compressed radially along the connecting rod 122 and generates an elastic force, and a released state in which the elastic force is released radially along the connecting rod 122. When the limiting cap 121 is externally squeezed, it switches from the released state to the compressed state, and when the external force is removed, it switches from the compressed state to the released state. When the limiting cap 121 is in the compressed state, its maximum outer diameter is less than or equal to the aperture of the connecting hole 101. When the limiting cap 121 is in the released state, its maximum outer diameter is greater than the aperture of the connecting hole 101. It should be noted that since the limiting cap 121 can be compressed, the inner hole aperture of the cylindrical portion only needs to be greater than the maximum outer diameter of the limiting cap 121 in the compressed state. When the limiting cap 121 is in the expanded state, its outer wall can elastically abut against the inner hole wall of the cylindrical portion. For example, the limiting cap 121 can be an arrow-shaped elastic piece, and the arrow direction is away from the connecting rod 122. When the first connecting member 11 and the second connecting member 12 need to be assembled, the limiting cap 121 can be inserted into the connecting hole 101 along the arrow direction. During the insertion process of the limiting cap 121, the elastic piece undergoes elastic deformation and elastically abuts against the hole wall of the connecting hole 101. At this time, the limiting cap 121 is in the compressed state. When the limiting cap 121 passes through the connecting hole 101 and enters the cylindrical portion, since the inner hole aperture of the cylindrical portion is greater than the aperture of the connecting hole, the arrow-shaped elastic piece releases the elastic force and expands outward. At this time, the limiting cap 121 switches from the compressed state to the released state, that is, the maximum diameter length of the limiting cap 121 is greater than the aperture of the connecting hole 101. Among them, the elastic piece can be spaced from the inner hole wall of the cylindrical portion or can abut against the inner hole wall of the cylindrical portion. If you want to reverse the extraction of the limiting cap from the connecting hole, since the distance between the arrow-shaped elastic pieces is greater than the aperture of the connecting hole 101, the elastic pieces will abut against the inner end face of the closed end of the cylindrical portion and cannot enter the connecting hole 101, thereby preventing the accidental separation of the first connecting member 11 and the second connecting member 12.

[0064] Alternatively, the limiting cap 121 can also be a sac-like structure made of a flexible material and having a cavity capable of filling a medium. The limiting cap 121 has a contracted state before filling the medium and an expanded state after filling the medium. The medium can be a gas, a liquid or solid particles. When the sac-like structure is in the contracted state, its maximum outer diameter is smaller than the aperture of the connecting hole 101, and when in the expanded state, its maximum outer diameter is larger than the aperture of the connecting hole 101. In this way, the limiting cap 121 can pass through the connecting hole 101 by deforming. That is to say, when it is necessary to pass through the connecting hole 101, the medium in the sac-like structure can be removed or part of the medium can be taken out from the expanded sac-like structure to make the limiting cap 121 switch to the contracted state. At this time, the sac-like structure can pass through the connecting hole 101 and enter the inner hole of the cylindrical part. When it is necessary to limit the position of the limiting cap 121, the medium can be filled into the sac-like structure until the sac-like structure switches from the contracted state to the expanded state. At this time, the maximum outer diameter of the limiting cap 121 is larger than the aperture of the connecting hole 101, thus preventing it from coming out of the connecting hole 101. Similarly, because the sac-like structure can be deformed, when the limiting cap 121 is in the expanded state, it can fit against the hole wall of the cylindrical part.

[0065] In addition, in order to prevent the connecting rod 122 from detaching from the connecting hole 101 jointly by the limiting cap 121 and the connecting mechanism 125 while facilitating the assembly of the first connecting member 11 and the second connecting member 12, in other embodiments, at least one of the connecting seat 123 and the limiting cap 121 can be detachably connected to the connecting rod 122. Then, the assembly operation of the first connecting member 11 and the second connecting member 12 can be as follows:

[0066] If the connecting rod 122 is detachably connected to the connecting mechanism 125 and fixedly connected to the limiting cap 121, when assembling, the connecting rod 122 can be passed through the connecting hole 101 in the direction away from the limiting cap 121, and then the connecting rod 122 can be detachably connected to the connecting mechanism 125 on the other side of the connecting hole 101. When disassembling, only by disassembling the connecting mechanism 125 from the other end of the connecting rod 122, the connecting rod 122 can be made to come out of the connecting hole 101 in the reverse direction along the installation path. Among them, the detachable connection method can be screw connection, snap connection, etc.

[0067] If the connecting rod 122 is detachably connected to the limiting cap 121 and fixedly connected to the connecting mechanism 125, when in use, the connecting rod 122 can be passed through the connecting hole 101 in the direction away from the connecting mechanism 125, and then the connecting rod 122 can be detachably connected to the limiting cap 121 on the other side of the connecting hole 101. When disassembling, only by disassembling the limiting cap 121 from the other end of the connecting rod 122, the connecting rod 122 can be made to come out of the connecting hole 101 in the reverse direction along the installation path. Among them, the detachable connection method can be screw connection, snap connection, etc.

[0068] Please refer to Figure 8 and Figure 9 In this embodiment, a wire pulling device is provided, which includes a pull rod 20, a handle 30, and the connecting structure 10 mentioned in any of the above embodiments. The pull rod 20 can penetrate through human tissue and is detachably connected to the first connecting member 11. The user pulls the pull rod 20 from outside the body to pull out the connector 90 from inside the body.

[0069] The pull rod 20 has a rod portion 21, a head portion 22 formed at one end of the rod portion 21, and a handle portion 23 formed at the other end of the rod portion 21. Among them, the rod portion 21 can be bent, and the material of the pull rod 20 is stainless steel, so that the pull rod 20 is not only convenient to penetrate into human tissue, but also has a long service life.

[0070] The first connecting member 11 is detachably connected to the head portion 22, and the second connecting member 12 is detachably connected to the connector 90. Preferably, an internal thread 112 is provided at one end of the cylindrical portion close to the opening end, and the pull rod 20 can be partially received in the cylindrical portion and screwed with the internal thread 112. Preferably, the head portion 22 of the pull rod 20 is fully or partially received in the cylindrical portion and screwed with the internal thread 112.

[0071] A threaded hole 201 is formed in the handle portion 23, and the handle 30 penetrates through the threaded hole 201 and is threadedly connected to the pull rod 20. Preferably, the opening direction of the threaded hole 201 is perpendicular to the extending direction of the rod portion 21, and the handle 30 penetrates through the threaded hole 201 and is threadedly connected to the handle portion 23. The handle 30 is strip-shaped and is used for the user to hold to pull the pull rod 20.

[0072] The wire pulling device further includes a cutter head 40, and the cutter head 40 can be detachably connected to the pull rod 20. When the pull rod 20 needs to penetrate from outside the body into the body, the cutter head 40 can make the pull rod 20 penetrate into the tissue more conveniently.

[0073] Please refer to Figure 10 and Figure 11 The cutter head 40 includes a conical portion 41 and an extension portion 42 extending from the large head end of the conical portion 41 in a direction away from the conical portion 41. The extension portion 42 can be detachably connected to the first connecting member 11. In this way, when the user pushes the pull rod 20 into the body, the pointed end of the conical portion 41 faces the advancing direction, and the conical portion 41 can reduce the resistance of the cutter head 40 to enter and facilitate the cutter head 40 to penetrate through the tissue.

[0074] Please refer to again Figure 10 and Figure 11, in the illustrated embodiment, the cutter head 40 is provided with a fixing groove 401. The fixing groove 401 extends from the end face of the extension portion 42 away from the tapered portion 41 towards the tapered portion 41. Among them, the pull rod 20 can be partially received in the fixing groove 401 and detachably connected to the cutter head 40. Specifically, the head 22 of the pull rod 20 can be fully or partially received in the fixing groove 401 and screwed to the cutter head 40. The material of the cutter head 40 is stainless steel, so that the cutter head 40 not only has good strength but also has a long service life.

[0075] In order to facilitate the cleaning and disinfection of the cutter head 40, in this embodiment, the cutter head 40 is provided with a side hole 402 extending along the radial direction of the cutter head 40. The side hole 402 penetrates the side wall of the cutter head 40 and communicates with the fixing groove 401, and the hole wall of the side hole 402 and the bottom wall of the fixing groove 401 are co-arc surfaces. In this way, the fixing groove 401 can be comprehensively cleaned and disinfected through the side hole 402 without cleaning dead corners. At the same time, the blood that enters the bottom of the fixing groove 401 can flow out of the cutter head 40 through the side hole 402, thereby reducing the amount of blood remaining in the fixing groove 401 and reducing pollution.

[0076] During use, first install the cutter head 40 on the head 22 of the pull rod 20, and then pass the pull rod 20 into the body from outside the body. When the head 22 reaches near the connector 90 of the blood pump, remove the cutter head 40, connect the first connector 11 to the head of the pull rod 20, and connect the connecting head 124 of the second connector 12 to the connector 90 of the blood pump, so as to realize the connection between the pull rod 20 and the connector 90 through the connection structure 10. The user pulls the pull rod 20 from outside the body to pull the connector 90 out of the body to the outside.

[0077] In other embodiments, the first connector 11 can also be detachably connected to the connector 90, and the second connector 12 can be detachably connected to the head 22 of the pull rod 20.

[0078] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connection structure, characterized in that, Comprising: A first connecting member, having a connection hole formed therein; A second connecting member, including a connecting mechanism, a connecting rod, and a limiting cap. The connecting mechanism is used for detachably connecting with a connector. The maximum outer diameter of the connecting mechanism is greater than the aperture of the connection hole. The connecting rod is inserted through the connection hole, and the connecting rod can swing relative to the central axis of the connection hole. One end of the connecting rod is connected to the connecting mechanism, the limiting cap is connected to the other end of the connecting rod, and the limiting cap and the connecting mechanism can jointly prevent the connecting rod from detaching from the connection hole.

2. The connection structure according to claim 1, characterized in that, Both the connecting mechanism and the limiting cap are fixedly connected to the connecting rod. The limiting cap is provided with an external thread, and the hole wall of the connection hole is provided with a mating thread adapted to the external thread; Or, the limiting cap is an elastic member. The maximum outer diameter of the limiting cap is greater than the aperture of the connection hole to prevent the connecting rod from detaching from the connection hole. The limiting cap can undergo elastic deformation, and when the limiting cap undergoes elastic deformation, it can pass through the connection hole; Or, at least one of the connecting mechanism and the limiting cap is detachably connected to the connecting rod.

3. The connection structure according to claim 1, characterized in that The connecting mechanism includes a connecting seat and a connecting head. The connecting seat is fixedly connected to the end of the connecting rod away from the limiting cap. The maximum outer diameter of the connecting seat is greater than the aperture of the connection hole. The connecting head is mounted on the connecting seat, and the connecting head can be detachably connected to the connector.

4. The connection structure according to claim 3, wherein, The connecting seat includes a cylindrical structure with one end open and the other end closed. The end of the connecting rod away from the limiting cap is fixedly connected to the closed end of the cylindrical structure, and the connecting head is at least partially received in the cylindrical structure.

5. The connection structure according to claim 3, characterized in that, The connecting head includes a connecting body and a rotating member rotatably connected to the connecting body. The connecting body is fixedly connected to the connecting seat. The connecting body can be detachably connected to the connector. The rotating member is provided with a engaging convex block that can engage with the engaging groove of the connector. The rotating member can rotate relative to the connecting body to make the engaging convex block engage with or disengage from the engaging groove; And / or, the connecting head is a waterproof connector capable of male-female mating with the connector.

6. The connection structure according to claim 1, characterized in that, The first connecting member includes a cylindrical portion having a closed end and an open end. The connection hole is formed in the closed end, and the limiting cap is received in the cylindrical portion.

7. A wire-pulling device, characterized in that, Including a pull rod and the connecting structure according to any one of claims 1 to 6, the pull rod can be detachably connected to the first connecting member.

8. The wire drawing device according to claim 7, characterized in that, The cable pulling device further includes a cutter head. The cutter head includes a conical portion and an extension portion extending from the large end of the conical portion in a direction away from the conical portion. The extension portion can be detachably connected to the first connecting member.

9. The wire drawing device according to claim 8, wherein A fixing groove is formed in the cutter head. The fixing groove extends from the end face of the extension part far away from the conical part towards the conical part. A side hole extending radially is also formed in the cutter head. The side hole penetrates through the side wall of the cutter head and communicates with the fixing groove, and the hole wall of the side hole and the bottom wall of the fixing groove are of a common arc surface. Wherein, the pull rod can be partially received in the fixing groove and is detachably connected to the cutter head.

10. The wire drawing device according to any one of claims 7 to 9, characterized in that, A threaded hole is formed in the pull rod. The wire pulling device further includes a handle. The handle penetrates through the threaded hole and is threadedly connected to the pull rod. And / or, the first connecting piece can be threadedly connected to the pull rod.

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