CN111463627A - Connection structure and cable pulling device - Google Patents

Abstract

The invention provides a connecting structure and a wire pulling device. The connecting structure includes a first connecting piece and a second connecting piece. The first connecting piece is provided with a connecting hole arranged therethrough; the second connecting piece includes a connecting mechanism, a connecting rod and a limit cap. , the connecting mechanism is used to be detachably connected with the connector, the maximum outer diameter of the connecting mechanism is larger than the diameter of the connecting hole, the connecting rod passes through the connecting hole, and the connecting rod can swing relative to the central axis of the connecting hole, and one end of the connecting rod is connected to the The connecting mechanism is connected, the limiting cap is connected with the other end of the connecting rod, and the limiting cap and the connecting mechanism can jointly prevent the connecting rod from leaving the connecting hole. The connecting rod of the connecting structure can swing relative to the central axis of the connecting hole, so the first connecting piece and the second connecting piece can move flexibly relative to each other, and the operation is more flexible.

Description

Connection structure and cable pulling device

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a connection structure and a wire pulling device.

Background technique

Usually, after the blood pump is implanted into the body, the connector of the blood pump needs to be pulled out of the body to connect the blood pump with the external controller. If the operator directly passes the connector out of the body by hand, it will easily lead to human infection. , in order to solve this problem, the operator will use an auxiliary tool to pass through the tissue to pull the connector of the blood pump. However, the current auxiliary tool has the problem of inflexible operation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a connection structure and a wire pulling device with more flexible operation, so as to facilitate the pulling work of the blood pump connector.

An object of the present invention is to provide a connection structure, comprising:

The first connecting piece is provided with a connecting hole;

The second connecting piece includes a connecting mechanism, a connecting rod and a limit cap, the connecting mechanism is used for detachable connection with the connector, the maximum outer diameter of the connecting mechanism is larger than the diameter of the connecting hole, and the connecting rod Pass through the connecting hole, and the connecting rod can swing relative to the central axis of the connecting hole, one end of the connecting rod is connected with the connecting mechanism, and the limiting cap is connected with the other end of the connecting rod connected, the limiting cap and the connecting mechanism jointly prevent the connecting rod from disengaging from the connecting hole.

In one embodiment, 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 connecting hole is provided with a connection with the connecting rod. The mating thread that matches the external thread;

Or, the limiting cap is an elastic piece, the maximum outer diameter of the limiting cap is larger than the diameter of the connecting hole to prevent the connecting rod from leaving the connecting hole, the limiting cap can be elastically deformed, and The limiting cap can pass through the connecting hole when elastically deformed;

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

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

In one embodiment, the connecting seat comprises 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 with the closed end of the cylindrical structure, the The connecting head is at least partially accommodated in the cylindrical structure.

In one embodiment, the connecting head includes a connecting body and a rotating part rotatably connected with the connecting body, the connecting body is fixedly connected with the connecting seat, and the connecting body can be detached from the connector The rotating member is provided with an engaging protrusion that can be engaged with the engaging groove of the connector, and the rotating member can rotate relative to the connecting body to make the engaging protrusion and the card The slot is snapped or separated;

And/or, the connector is a waterproof connector that can be mated with the male and female of the connector.

In one embodiment, the first connecting member includes a cylindrical portion, the cylindrical portion has a closed end and an open end, the connecting hole is opened at the closed end, and the limiting cap is accommodated in the closed end. inside the cylindrical portion.

Another object of the present invention is to provide a wire pulling device, comprising a pulling rod and the above-mentioned connecting structure, wherein the pulling rod can be detachably connected with the first connecting member.

In one embodiment, the wire pulling device further includes a cutter head, the cutter head includes a tapered portion and an extension portion extending from a large end of the tapered portion in a direction away from the tapered portion, the The extension is detachably connectable to the first connector.

In one embodiment, a fixing groove is formed on the cutter head, and the fixing groove extends from the end face of the end of the extension portion away from the tapered portion toward the tapered portion, and the cutter head is also provided with a fixing groove. A side hole extending in the radial direction is provided, 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. Wherein, the pull rod can be partially accommodated in the fixing groove and be detachably connected with the cutter head.

In one embodiment, a threaded hole is formed on the pull rod, and the pull wire device further includes a handle, and the handle can pass through the threaded hole and be threadedly connected to the pull rod;

And/or, the first connecting member can be screwed with the pull rod.

The technical effect of the present invention is: when the connecting rod passes through the connecting hole, the first connecting piece is located between the connecting mechanism and the limiting cap, and the limiting cap and the connecting mechanism can jointly prevent the connecting rod from leaving the connecting hole, that is, Both the connecting seat and the limiting cap have a limiting effect on the first connecting piece, so as to prevent the first connecting piece from being separated from the second connecting piece. Since the connecting rod can swing relative to the central axis of the connecting hole, the first connecting piece and the second connecting piece can move flexibly relative to each other, which not only facilitates the connecting operation of the pulling rod for pulling and the first connecting piece, but also Moreover, the connection operation of the second connector and the connector of the blood pump located in the body can be facilitated, and the operation is more flexible.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments of the present invention or the prior art. Obviously, the drawings described below are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic three-dimensional structure diagram of a connection structure provided by an embodiment of the present invention;

Fig. 2 is the exploded view that the connection structure shown in Fig. 1 omits the connection head;

Fig. 3 is an exploded view of the second connecting piece of the connecting structure shown in Fig. 1;

4 is a cross-sectional view of the first connector and the second connector of the connecting structure shown in FIG. 1 omitting the connector;

FIG. 5 is a schematic structural diagram of the connector of the second connector shown in FIG. 3;

Fig. 6 is the schematic diagram of another angle of the connector of Fig. 5;

7 is a schematic structural diagram of an embodiment of a connector of a blood pump;

8 is a schematic structural diagram of a wire pulling device of the present invention;

Fig. 9 is the exploded view of Fig. 8;

Fig. 10 is the structural representation of the cutter head of the wire pulling device of Fig. 8;

FIG. 11 is a front view of FIG. 10 .

Description of reference numbers:

10, connecting structure; 101, connecting hole; 11, first connecting piece; 111, mating thread; 112, internal thread; 12, second connecting piece; 121, limit cap; 1211, external thread; 122, connecting rod; 123, connecting seat; 1231, engaging protrusion; 124, connecting head; 1241, connecting body; 1242, rotating part; 1243, annular protrusion; 1244, engaging protrusion; 125, connecting mechanism; 1201, guide groove ; 1202, limit groove; 20, tie rod; 201, threaded hole; 21, rod part; 22, head; 23, handle part; 30, handle; 40, cutter head; 41, tapered part; 42, extension part ; 401, fixed slot; 402, side hole; 90, connector; 901, jack; 902, snap slot; 91, plug end.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the 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 situations.

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

Referring to FIG. 1 , the present invention provides a connection structure 10 , which can be used for pulling the connector 90 (refer to FIG. 8 ) of the blood pump out of the body, and the connection structure 10 can be connected to the blood pump The connector 90 and the pull rod 20 are formed, so that the connector 90 of the blood pump can be pulled out of the body through the pull rod 20 . The pull rod 20 is a component that can be worn through human tissue and used for the operator to apply a pulling force outside the body to achieve pulling work. The connecting structure 10 includes a first connecting member 11 and a second connecting member 12 .

Please refer to FIG. 2 , the first connecting member 11 defines a connecting 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 connecting hole 101 is opened at the closed end. Among them, the connecting hole 101 communicates with the inner hole of the cylindrical portion. In the illustrated embodiment, the first connecting member 11 is a cylindrical portion. It can be understood that, in other embodiments, the first connecting member 11 may also include other structures other than the cylindrical portion, or the first connecting member 11 The connecting member 11 may also not include a cylindrical portion, and the first connecting member 11 may be other structures having a connecting hole 101 . The cylindrical portion is used for connecting with the draw rod 20 , and specifically, it can be connected by a thread, for example, by providing an internal thread to be screwed with the draw rod 20 or by setting an external thread to be screwed with the draw rod 20 .

In one of the embodiments, 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.

Please refer to FIG. 3 and FIG. 4 together. 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 detachable connection with the connector 90 of the blood pump. The maximum outer diameter is larger than the diameter of the connecting hole 101 , the connecting rod 122 is inserted 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 with the connecting mechanism 125 , and the limiting cap 121 is connected with the other end of the connecting rod 122 . Specifically, the maximum outer diameter of the connecting rod 122 is smaller than the diameter of the connecting hole 101 , and the length of the connecting rod 122 is greater than the depth of the connecting hole 101 , so that when the connecting rod 122 passes through the connecting hole 101 , the first connecting piece 11 is located in the connecting mechanism Between 125 and the limiting cap 121 , the connecting rod 122 has a movable space in both the axial and radial directions, so as to swing 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 and the second connecting member 12 from being separated.

The connecting rod 122 can be prismatic, cylindrical or elliptical, that is, its cross section along its extending direction is square or rectangular, and the connecting rod 122 can also be prismatic, circular truncated, or elliptical truncated, that is, its extending direction is in the shape of a prism. The section is trapezoid. The maximum outer diameter of the connecting rod 122 refers to the maximum value among all distances between each point on the outer wall of the connecting rod 122 and other points on the section where the point is located. Specifically, in the illustrated implementation, the connecting rod 122 is cylindrical with a smooth surface. The limiting cap 121 is accommodated in the cylindrical portion.

After the blood pump is implanted into the human body, the connector 90 of the blood pump needs to be pulled out of the body to be electrically connected with 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 connected to the first connecting member 11 and the second connecting member 12 respectively (refer to FIG. 8 ), and the connector 90 can be pulled out of the body by pulling the pull rod 20 . 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 flexibly relative to each other, which is more flexible, which not only facilitates the pulling rod 20 for pulling The connection operation with the first connector 11 can also facilitate the connection operation between the second connector 12 and the connector 90 of the blood pump located in the body, and the operation is more flexible.

Referring to FIG. 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 FIG. 3 together, the connecting mechanism 125 includes a connecting seat 123 and a connecting head 124, the connecting seat 123 is fixedly connected with the end of the connecting rod 122 away from the limiting cap 121, and the maximum outer diameter of the connecting seat 123 is larger than that of the connecting rod 122. The diameter of the hole 101 is the diameter of the hole 101 , and the connecting head 124 is installed on the connecting seat 123 , and the connecting head 124 can be detachably connected with the connector 90 . In this way, the connection base 123 and the connector 90 can be connected through the connection head 124 . Specifically, the connecting seat 123 , the connecting rod 122 and the limiting cap 121 are fixedly connected, and more specifically, the connecting seat 123 , the connecting rod 122 and the limiting cap 121 are integrally formed. In one embodiment, the material of the connecting seat 123 , the connecting rod 122 and the limiting cap 121 is stainless steel, so that the second connecting member 12 not only has good strength, but also has a long service life.

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 fixed to the closed end of the cylindrical structure, and the connecting head 124 is at least partially accommodated in the cylindrical structure. in a cylindrical structure. Specifically, in the illustrated embodiment, the connecting seat 123 is a cylindrical structure. It can be understood that in other embodiments, the connecting seat 123 may also include other structures other than the cylindrical structure, or the connecting seat 123 may also be Other structures that do not contain cylindrical structures.

Referring to FIG. 5 , specifically, the connecting head 124 includes a connecting body 1241 , which is fixedly connected to the connecting base 123 , and the connecting body 1241 can be detachably connected to the connector 90 of the blood pump.

Please refer to FIG. 3 and FIG. 4 again, the connecting seat 123 further includes an engaging protrusion 1231 disposed on the inner wall of the cylindrical structure, and the connecting body 1241 is engaged with the engaging protrusion 1231 .

The side wall of the connection body 1241 is provided with a guide groove 1201 and a limit groove 1202 , the limit groove 1202 extends along the circumferential direction of the connection body 1241 , the guide groove 1201 extends along the axial direction of the connection body 1241 , and the guide groove 1201 and the limit groove 1202 Communication, the engaging protrusion 1231 is engaged with the limiting groove 1202 to prevent the connection body 1241 from separating from the connecting seat 123 , and the engaging protrusion 1231 can slide into the limiting groove 1202 from the guide groove 1201 . Specifically, the width of the guide groove 1201 along the circumferential direction of the connecting body 1241 is not less than the width of the engaging 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 engaging protrusion 1231 The width along the axial direction of the connecting seat 123 is such that the engaging protrusion 1231 can slide into the limiting groove 1202 from the guide groove 1201 .

By adopting the connecting body 1241 and the connecting seat 123 of the above structure, the assembly of the connecting body 1241 and the connecting seat 123 can be simply realized. Then, the assembling method of the connecting body 1241 and the connecting seat 123 is as follows: Align the guide groove 1201, and then insert the connecting body 1241 into the connecting seat 123. At this time, the engaging protrusion 1231 slides into the limiting groove 1202 along the extending direction of the guide groove 1201, and the connecting body 1241 is rotated. The extension direction of the position slot 1202 slides until the engaging protrusion 1231 is misaligned with the guide groove 1201, that is, the engaging of the connecting body 1241 and the connecting seat 123 is realized. At 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 . Wherein, a plurality of engaging protrusions 1231 may 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.

More specifically, in this embodiment, the connecting body 1241 has a fixed end fixed to the connecting seat 123 and a connecting end that can be detachably connected to the connector 90 , and two annular protrusions are provided on the circumference of the outer wall of the connecting body 1241 . 1243, two annular protrusions 1243 are arranged at intervals along the axial direction, a limiting groove 1202 is formed between the two annular protrusions 1243, and the guiding groove 1201 is opened on the annular protrusion 1243 close to the fixed end of the connecting body 1241 and penetrates through the ring The two side walls of the protrusion 1243 in the axial direction.

In order to further tighten the connection between the connecting body 1241 and the connecting seat 123, glue 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, the Glue is used to prevent the connection body 1241 from being separated from the connection base 123 , especially to reduce the risk of accidental loosening during use.

Specifically, the connection body 1241 is detachably connected to the connector 90 by plugging.

In order to further prevent the separation of the connector 124 from the connector 90 of the blood pump, especially the separation of the connector 124 and the connector 90 connected by plugging, the connector 124 also includes a rotating part 1242 that is rotatably connected to the connecting body 1241. The component 1242 is provided with an engaging groove 902 that can be connected with the connector 90 (refer to FIG. 7 , generally, the connector 90 of the blood pump has a plug end 91, and the plug end 91 is provided with a connector for electrical connection with another connector. The socket 901 of the connector body 1241 can be inserted into the socket 901 to realize the plug connection between the connection body 1241 and the connector 90. The outer edge of the plug end 91 of the connector 90 usually has a snap groove 902, The engaging slot 902 is a slot for engaging with another connector. Usually, the engaging slot 902 is in the shape of a hook.) The engaging projection 1244, the rotating part 1242 can rotate relative to the connecting body 1241 to make The engaging protrusions 1244 are engaged with or separated from the engaging grooves 902 . Specifically, the rotating member 1242 is rotatably sleeved outside the connecting body 1241 , and is spaced apart from the outer wall of the connecting end to form a gap for receiving the outer edge of the plug-in end 91 . The engaging protrusions 1244 are disposed on the inner wall of the rotating member 1242 .

When connecting the connector 124 to the connector 90 of the blood pump, the rotating part 1242 is rotated to align the engaging protrusions 1244 with the engaging grooves 902 , and then the connecting end of the connecting body 1241 is inserted into the socket of the connector 90 In 901, at this time, the engaging protrusion 1244 also slides into the engaging groove 902, the rotating member 1242 is released, and the rotating member 1242 is reset. It is engaged with the engaging groove 902 to prevent the connector 124 from disengaging from the connector 90 .

Further, 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 prevent the connector 90 from being poorly connected.

Specifically, the connector 124 is a waterproof connector that can be mated with the connector 90 male and female.

Further, the swing angle of the connecting rod 122 is less than or equal to 40°. That is, 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 .

Please refer to FIG. 3 again, the maximum outer diameter of the limiting cap 121 is smaller than the inner diameter of the cylindrical portion, so that when the limiting cap 121 enters the cylindrical portion through the connecting hole 101 , there is a gap between the limiting cap 121 and the inner wall of the cylindrical portion. A certain movement space is reserved so that the limiting cap 121 can 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 accommodated in the cylindrical portion and is protected from external bumps.

In the illustrated embodiment, in order to facilitate the assembly of the first connecting piece 11 and the second connecting piece 12 while the limiting cap 121 and the connecting mechanism 125 jointly prevent the connecting rod 122 from leaving the connecting hole 101 , please refer to FIG. 2 Referring to FIG. 3 , the limiting cap 121 is provided with an external thread 1211 , and the hole wall of the connecting hole 101 is provided with a matching thread 111 which is adapted to the external thread 1211 . Specifically, the limiting cap 121 has a cylindrical shape and is disposed coaxially 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 . The diameter of the connection hole 101 refers to the inner diameter of the mating thread 111 . Through the cooperation between the matching 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 accommodated in the inner hole of the cylindrical portion, so that the connecting rod 122 can pass through the connecting hole 101. The active connection of the first connector 11 and the second connector 12 is realized.

Then, the assembly operation of the first connector 11 and the second connector 12 can be realized as follows:

Align the central axis of the limiting cap 121 with the central axis of the connecting hole 101 , and then rotate one of the first connecting piece 11 and the second connecting piece 12 so that the outer thread 1211 of the limiting cap 121 is aligned with the first connecting piece 11 The matching thread 111 of the first connecting piece 111 is threadedly matched. During the threading process, the limiting cap 121 gradually passes through the connecting hole 101 until the outer thread 1211 of the limiting cap 121 is disengaged from the matching thread 111 of the first connector 11. At this time, the connection The rod 122 passes through the connecting hole 101, and the outer thread 1211 of the limiting cap 121 abuts against the edge of the connecting hole 101, thereby preventing the limiting cap 121 from passing through the connecting hole 101, and realizing the connection between the first connecting piece 11 and the second connecting piece 101. 12 connection. To separate the first connecting piece 11 from the second connecting piece 12 , it is also necessary to first align the central axis of the limiting cap 121 with the central axis of the connecting hole 101 , and then reversely rotate the first connecting piece 11 and the second connecting piece 12, so that the outer thread 1211 of the limiting cap 121 is re-threaded with the mating thread 111 of the connecting hole 101. During the threading process, the limiting cap 121 gradually passes through the connecting hole 101 until the limiting cap The external thread 1211 of the 121 is disengaged from the mating thread 111 of the first connecting piece 11 . At this time, the limiting cap 121 is disengaged from the connecting hole 101 , and the second connecting piece 12 is separated from the first connecting piece 11 . It can be seen that the removal of the limiting cap 121 from the connecting hole 101 requires complicated and complicated operation steps, and the limiting cap 121 and the first connecting piece 11 cannot be moved axially and disengaged from the connecting hole 101 without being aligned and rotated. . That is to say, if it is not manually and deliberately operated, the limiting cap 121 will not accidentally come off from the connecting hole 101 , the reliability is high, and the risk of the first connecting member 11 and the second connecting member 12 being disconnected is small. The first connecting piece 11 and the second connecting piece 12 that are connected in this way can be made of rigid materials with good strength, such as stainless steel, which not only makes the connecting structure 10 have a longer service life, but is less prone to breakage, etc. problem, in order to reduce the risk of surgery, and to facilitate the replacement of the first connecting piece 11 or the second connecting piece 12, thereby reducing waste of resources. In addition, by adopting this connection method, the limiting cap 121 , the connecting seat 123 and the connecting rod 122 can be integrally formed, which not only simplifies the fabrication and assembly of the connection structure 10 , but also can be assembled on the The combined form reduces the risk of loosening, further reducing the risk of surgery.

It should be noted that, in order to facilitate the assembly of the first connecting piece 11 and the second connecting piece 12 while the limiting cap 121 and the connecting mechanism 125 jointly prevent the connecting rod 122 from being separated from the connecting hole 101 , it is not limited to the above-mentioned method. In other embodiments, the limiting cap 121 is fixedly connected to the connecting rod 111 and is an elastic member, and the maximum outer diameter of the limiting cap 121 is larger than the diameter of the connecting hole 101 to prevent the connecting rod 111 from disengaging from the connecting hole 101, and the limiting cap 121 can Elastically deformed, and the limiting cap 121 can pass through the connecting hole 101 when elastically deformed. At this time, the limit cap 121 is made of an elastic material, the limit cap 121 has a compressed state in which it is compressed along the radial direction of the connecting rod 122 and generates elastic force, and a released state in which the elastic force is released along the radial direction of the connecting rod 122 , the limit cap 121 When squeezed by an external force, it switches from a released state to a compressed state, and when the external force is removed, it switches from a compressed state to a released state. When the limiting cap 121 is in a compressed state, its maximum outer diameter is smaller than or equal to the diameter of the connecting hole 101 , and when the limiting cap 121 is in a released state, its maximum outer diameter is larger than the diameter of the connecting hole 101 . It should be noted that since the limit cap 121 is compressible, the inner hole diameter of the cylindrical portion only needs to be larger than the maximum outer diameter of the limit cap 121 in the compressed state. When the limit cap 121 is in the expanded state, its outer wall can be It elastically contacts with the inner hole wall of the cylindrical portion. For example, the limiting cap 121 may be an arrow-shaped elastic piece, the direction of the arrow facing away from the connecting rod 122 . When the first connector 11 and the second connector 12 need to be assembled, the limiting cap 121 can be inserted into the connecting hole 101 in the direction of the arrow. During the passage of the limiting cap 121 , the elastic piece is elastically deformed and elastically resists the connecting hole The hole wall of 101, the limit cap 121 is in a compressed state at this time, when the limit cap 121 passes through the connecting hole 101 and enters the cylindrical part, because the inner hole diameter of the cylindrical part is larger than the connecting hole diameter, the arrow-shaped elastic pieces release the elastic force and open outward, at this time, the limit cap 121 is switched from the compressed state to the release state, that is, the maximum diameter of the limit cap 121 is greater than the diameter of the connecting hole 101, wherein the elastic sheet can be spaced from the inner hole wall of the cylindrical portion. , and can also interfere with the inner hole wall of the cylindrical portion. If the limiting cap is to be pulled out from the connecting hole in the reverse direction, since the distance between the arrow-shaped elastic pieces is larger than the diameter of the connecting hole 101, the elastic pieces will abut on the inner end face of the closed end of the cylindrical part and cannot enter the connecting hole 101, so that the The accidental separation of the first connector 11 and the second connector 12 is prevented.

Alternatively, the limiting cap 121 may also be a bladder-shaped structure, and the bladder-shaped structure is made of a flexible material and has a cavity capable of being filled with a medium. The limiting cap 121 has a contracted state before being filled with the medium and an expanded state after being filled with the medium. The medium can be gas, liquid or solid particles. When the bladder-like structure is in a contracted state, its maximum outer diameter is smaller than the diameter of the connection hole 101 , and when it is in an expanded state, its maximum outer diameter is larger than the diameter of the connection hole 101 . In this way, the limiting cap 121 can pass through the connecting hole 101 through deformation, that is, when it is necessary to pass through the connecting hole 101, the media in the bladder-like structure can be removed or a part of the media can be taken out from the bladder-like structure in an expanded state. In this way, the limiting cap 121 is switched to the retracted state, and at this time, the bag-like structure can pass through the connecting hole 101 and enter the inner hole of the cylindrical portion. When the limiting cap 121 is required to limit the position, the bag-shaped structure can be filled with a medium until the bladder-shaped structure is switched from the contracted state to the expanded state. At this time, the maximum outer diameter of the limiting cap 121 is larger than the diameter of the connecting hole 101 , so that the Avoid it coming out of the connection hole 101 . Likewise, since the bladder-shaped structure can be deformed, when the limiting cap 121 is in the expanded state, it can be in close contact with the hole wall of the cylindrical portion.

In addition, in order to facilitate the assembly of the first connecting piece 11 and the second connecting piece 12 while the limiting cap 121 and the connecting mechanism 125 jointly prevent the connecting rod 122 from leaving the connecting hole 101, in other embodiments, the connecting At least one of the seat 123 and the limiting cap 121 is detachably connected with the connecting rod 122, then, the assembly operation of the first connecting piece 11 and the second connecting piece 12 can be realized as follows:

If the connecting rod 122 is detachably connected to the connecting mechanism 125 and is fixedly connected with the limiting cap 121, when it needs to be assembled, 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 inserted into the connecting hole 101 The other side of the connecting rod 122 and the connecting mechanism 125 are detachably connected. When it needs to be disassembled, it is only necessary to disassemble the connecting mechanism 125 from the other end of the connecting rod 122, so that the connecting rod 122 can be disengaged from the connecting hole 101 in the reverse direction of the installation path. Among them, the detachable connection method may be screw connection, snap connection, and the like.

If the connecting rod 122 is detachably connected to the limiting cap 121 and is fixedly connected with the connecting mechanism 125, when it is needed, 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 inserted into the connecting hole 101. On the other side, the connecting rod 122 is detachably connected with the limiting cap 121 . When it needs to be disassembled, it is only necessary to disassemble the limiting cap 121 from the other end of the connecting rod 122, so that the connecting rod 122 can be removed from the connecting hole 101 in the reverse direction of the installation path. Among them, the detachable connection method may be screw connection, snap connection, and the like.

Referring to FIG. 8 and FIG. 9 , the present embodiment provides a wire pulling device including a pulling rod 20 , a handle 30 and the connecting structure 10 mentioned in any of the above embodiments. The pull rod 20 can pass through the human tissue and be detachably connected to the first connector 11 . The user pulls the pull rod 20 from outside the body to pull the connector 90 out of the body.

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. The rod portion 21 can be bent, and the material of the pull rod 20 is stainless steel. In this way, the tie rod 20 is not only convenient to be pierced in human tissue, but also has a long service life.

The first connector 11 is detachably connected to the head 22 , and the second connector 12 is detachably connected to the connector 90 . Preferably, an inner thread 112 is provided on one end of the cylindrical portion close to the open end, and the tie rod 20 can be partially accommodated in the cylindrical portion and screwed with the inner thread 112. inside and screwed with the internal thread 112.

The handle portion 23 is provided with a threaded hole 201 , and the handle 30 is threaded 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 is inserted through the threaded hole 201 and is threadedly connected to the handle portion 23 . The handle 30 is in the shape of a strip, which is used for the user to hold to pull the pull rod 20 .

The wire pulling device further includes a cutter head 40 , and the cutter head 40 can be detachably connected with the pulling rod 20 . When the pulling rod 20 needs to be penetrated from the outside to the inside of the body, the cutting head 40 can make the pulling rod 20 penetrate the tissue more conveniently.

10 and FIG. 11 , the cutter head 40 includes a tapered portion 41 and an extension portion 42 extending from the large end of the tapered portion 41 away from the tapered portion 41 . The extension portion 42 can be detachably connected to the first The connecting piece 11 is used so that when the user pushes the pull rod 20 into the body, the pointed end of the tapered portion 41 faces the forward direction, and the tapered portion 41 can reduce the resistance of the cutter head 40 to enter and facilitate the cutter head 40 to pass through the tissue.

Referring to FIGS. 10 and 11 again, in the illustrated embodiment, the cutter head 40 is provided with a fixing groove 401 , and the fixing groove 401 extends from the end face of the end of the extension portion 42 away from the tapered portion 41 toward the tapered portion 41 , wherein , the pull rod 20 can be partially accommodated in the fixing groove 401 and be detachably connected with the cutter head 40 . Specifically, the head 22 of the tie rod 20 can be fully or partially accommodated in the fixing groove 401 and screwed with 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.

In order to facilitate cleaning and sterilization 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 , and 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 slot 401 share an arc surface. In this way, the fixing groove 401 can be thoroughly cleaned and sterilized through the side hole 402, and there will be no dead angle for cleaning. At the same time, the blood entering the bottom of the fixing groove 401 can flow out of the cutter head 40 through the side hole 402, thereby reducing the residual The amount of blood in the tank 401 is fixed and contamination is reduced.

When in use, first install the cutter head 40 on the head 22 of the pull rod 20, then insert the pull rod 20 into the body from outside the body, when the head 22 reaches the vicinity of the connector 90 of the blood pump, remove the cutter head 40, The first connecting piece 11 is connected with the head of the pull rod 20, and the connecting head 124 of the second connecting piece 12 is connected with the connector 90 of the blood pump, so as to realize the connection between the pull rod 20 and the connector 90 through the connecting structure 10. The pull rod 20 is pulled outside the body to pull the connector 90 out of the body to the outside of the body.

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 .

The above are only 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 principles of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (10)

1. a connection structure, is characterized in that, comprises: The first connecting piece is provided with a connecting hole; The second connecting piece includes a connecting mechanism, a connecting rod and a limit cap, the connecting mechanism is used for detachable connection with the connector, the maximum outer diameter of the connecting mechanism is larger than the diameter of the connecting hole, and the connecting rod Pass through the connecting hole, and the connecting rod can swing relative to the central axis of the connecting hole, one end of the connecting rod is connected with the connecting mechanism, and the limiting cap is connected with the other end of the connecting rod The limiting cap and the connecting mechanism can jointly prevent the connecting rod from being separated from the connecting hole. 2 . The connection structure according to claim 1 , wherein the connection mechanism and the limit cap are fixedly connected to the connecting rod, the limit cap is provided with an external thread, and the connection hole is provided with an external thread. 3 . The hole wall of the hole is provided with a mating thread that is adapted to the external thread; Or, the limiting cap is an elastic piece, the maximum outer diameter of the limiting cap is larger than the diameter of the connecting hole to prevent the connecting rod from leaving the connecting hole, the limiting cap can be elastically deformed, and The limiting cap can pass through the connecting hole when elastically deformed; Or, at least one of the connecting seat and the limiting cap is detachably connected to the connecting rod. 3 . The connecting structure according to claim 1 , wherein the connecting mechanism comprises a connecting seat and a connecting head, the connecting seat is fixedly connected with an end of the connecting rod away from the limiting cap, and the The maximum outer diameter of the connection seat is larger than the diameter of the connection hole, the connection head is mounted on the connection seat, and the connection head can be detachably connected with the connector. 4 . The connecting structure according to claim 3 , wherein the connecting seat comprises a cylindrical structure with one end open and the other end closed, and one end of the connecting rod away from the limiting cap is connected to the cylindrical structure. 5 . The closed end of the structure is fixedly connected, and the connecting head is at least partially accommodated in the cylindrical structure. 5 . The connecting structure according to claim 3 , wherein the connecting head comprises a connecting body and a rotating part rotatably connected with the connecting body, the connecting body is fixedly connected with the connecting seat, and the connecting The main body can be detachably connected with the connector, the rotating member is provided with an engaging projection that can be engaged with the engaging groove of the connector, and the rotating member can rotate relative to the connecting body to make the the engaging protrusion is engaged with or separated from the engaging groove; And/or, the connector is a waterproof connector capable of mating with the male and female of the connector. 6 . The connection structure according to claim 1 , wherein the first connecting member comprises a cylindrical portion, the cylindrical portion has a closed end and an open end, and the connecting hole is opened at the closed end, 6 . The limiting cap is accommodated in the cylindrical portion. 7 . A wire pulling device, characterized in that it comprises a pull rod and the connecting structure according to any one of claims 1 to 6 , wherein the pull rod can be detachably connected to the first connecting piece. 8 . 8 . The wire pulling device according to claim 7 , wherein the wire pulling device further comprises a cutter head, the cutter head comprises a tapered portion and a large end of the tapered portion faces away from the tapered portion. 9 . An extension portion extending in the direction of the extension portion can be detachably connected to the first connector. 9 . The wire pulling device according to claim 8 , wherein a fixing groove is formed on the cutter head, and the fixing groove faces the cone from an end of the extension portion away from the end of the tapered portion. 10 . The cutter head is also provided with a radially extending side hole, 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 is connected to the The bottom walls of the fixing groove share a common arc surface, wherein the tie rod can be partially accommodated in the fixing groove and is detachably connected with the cutter head. 10. The wire pulling device according to any one of claims 7 to 9, wherein a threaded hole is formed on the pulling rod, and the pulling wire device further comprises a handle, the handle passing through the threaded hole and being connected with the threaded hole. The tie rod threaded connection; And/or, the first connector can be screwed with the pull rod.

Images