CN111463627A - Connection structure and wire pulling device - Google Patents

Abstract

The invention provides a connecting structure and a wire pulling device, wherein the connecting structure comprises a first connecting piece and a second connecting piece, and the first connecting piece is provided with a connecting hole which is arranged in a penetrating way; the second connecting piece includes coupling mechanism, connecting rod and spacing cap, and coupling mechanism is used for being connected with connector detachably, and coupling mechanism's the biggest external diameter is greater than the aperture of connecting hole, and the connecting rod is worn to locate the connecting hole, and the connecting rod can swing the central axis of connecting hole relatively, and the one end and the coupling mechanism of connecting rod are connected, and spacing cap is connected with the other end of connecting rod, and spacing cap can prevent the connecting rod to break away from the connecting hole jointly with coupling mechanism. The connecting rod of the connecting structure can swing relative to the central axis of the connecting hole, so that the first connecting piece and the second connecting piece can flexibly move relative to each other, and the operation is more flexible.

Description

Connection structure and wire pulling device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a connecting structure and a wire pulling device.

Background

Generally, after the blood pump is implanted into a body, the connector of the blood pump needs to be pulled out of the body so as to connect the blood pump with an external controller, if an operator directly penetrates the connector out of the body by hands, human body infection is easily caused, and in order to solve the problem, the operator can use an auxiliary tool to penetrate through tissues so as to pull the connector of the bleeding pump, however, the existing auxiliary tool has the problem of inflexible operation.

Disclosure of Invention

The invention aims to provide a connection structure and a wire pulling device which are flexible to operate, so that the pulling work of a blood pump connector is facilitated.

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

the first connecting piece is provided with a connecting hole;

the second connecting piece, including coupling mechanism, connecting rod and spacing cap, coupling mechanism is used for being connected with connector detachably, coupling mechanism's maximum external diameter is greater than the aperture of connecting hole, the connecting rod is worn to locate the connecting hole, just the connecting rod can be relative the central axis swing of connecting hole, the one end of connecting rod with coupling mechanism connects, spacing cap with the other end of connecting rod is connected, spacing cap with coupling mechanism stops jointly the connecting rod breaks away from the connecting hole.

In one embodiment, the connecting mechanism and the limiting cap are fixedly connected with the connecting rod, the limiting cap is provided with an external thread, and the hole wall of the connecting hole is provided with a matching thread matched with the external thread;

or the limiting cap is an elastic part, the maximum outer diameter of the limiting cap is larger than the aperture of the connecting hole so as to prevent the connecting rod from being separated from the connecting hole, the limiting cap can elastically deform, and the limiting cap can penetrate through the connecting hole when elastically deforming;

or at least one of the connecting seat and the limiting cap is detachably connected with the connecting rod.

In one embodiment, the connecting mechanism comprises a connecting seat and a connector, the connecting seat is fixedly connected with one end, far away from the limiting cap, of the connecting rod, the maximum outer diameter of the connecting seat is larger than the aperture of the connecting hole, the connector is mounted on the connecting seat, and the connector can be detachably connected with the connector.

In one embodiment, the connecting seat comprises a cylindrical structure with an open end and a closed end, one end of the connecting rod, which is far away from the limiting cap, is fixedly connected with the closed end of the cylindrical structure, and the connecting head is at least partially accommodated in the cylindrical structure.

In one embodiment, the connector 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 is detachably connected to the connector, the rotating member is provided with a locking protrusion capable of locking with a locking groove of the connector, and the rotating member is capable of rotating relative to the connecting body to lock or separate the locking protrusion with or from the locking groove;

and/or the connector is a waterproof connector capable of being matched with the male connector and the female connector.

In one embodiment, the first connecting piece comprises a cylindrical part, the cylindrical part is provided with a closed end and an open end, the connecting hole is formed in the closed end, and the limiting cap is contained in the cylindrical part.

Another object of the present invention is to provide a wire pulling apparatus, comprising a pulling rod and the connecting structure as described above, wherein the pulling rod is detachably connected with the first connecting piece.

In one embodiment, the wire pulling device further comprises a cutter head, the cutter head comprises a conical part and an extension part extending from the large end of the conical part in a direction opposite to the conical part, and the extension part can be detachably connected to the first connecting piece.

In one embodiment, the cutting head is provided with a fixing groove, the fixing groove extends from an end surface of one end of the extending portion, which is far away from the tapered portion, to the tapered portion, the cutting head is further provided with a side hole extending in the radial direction, the side hole penetrates through a side wall of the cutting head and is communicated with the fixing groove, a hole wall of the side hole is co-arc with a bottom wall of the fixing groove, and the pull rod can be partially accommodated in the fixing groove and is detachably connected with the cutting head.

In one embodiment, the pull rod is provided with a threaded hole, and the wire pulling device further comprises a handle which can be inserted into the threaded hole and is in threaded connection with the pull rod;

and/or the first connecting piece can be in threaded connection with the pull rod.

The invention has the technical effects that: when the connecting rod wears to locate the connecting hole, first connecting piece is located between coupling mechanism and the spacing cap, and spacing cap and coupling mechanism can stop the connecting rod to break away from the connecting hole jointly, that is to say, the connecting seat just all played limiting displacement to first connecting piece with spacing cap to prevent first connecting piece and second connecting piece separation. Because the connecting rod can be for the central axis swing of connecting hole, consequently first connecting piece and second connecting piece alright in order to move about in a flexible way each other relatively, this not only can conveniently be used for dragging the pull rod and the connection operation of first connecting piece of dragging, also can make things convenient for the connection operation of second connecting piece and the connector that is located internal blood pump moreover, and the operation is more nimble.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a connection structure provided in an embodiment of the present invention;

fig. 2 is an exploded view of the coupling structure shown in fig. 1 with the coupling head omitted;

FIG. 3 is an exploded view of a second connector of the connection shown in FIG. 1;

fig. 4 is a sectional view of the first and second connectors of the coupling structure shown in fig. 1, with the connection heads omitted;

FIG. 5 is a schematic structural diagram of a connecting head of the second connecting member shown in FIG. 3;

FIG. 6 is a schematic view of another angle of the connecting head of FIG. 5;

FIG. 7 is a schematic structural view of an embodiment of a connector for a blood pump;

FIG. 8 is a schematic view of a pull apparatus of the present invention;

FIG. 9 is an exploded view of FIG. 8;

FIG. 10 is a schematic view of the cutter head of the cable pulling device of FIG. 8;

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

Description of reference numerals:

10. a connecting structure; 101. connecting holes; 11. a first connecting member; 111. matching threads; 112. an internal thread; 12. a second connecting member; 121. a limiting cap; 1211. an external thread; 122. a connecting rod; 123. a connecting seat; 1231. clamping the protrusion; 124. a connector; 1241. a connecting body; 1242. a rotating member; 1243. an annular projection; 1244. clamping the convex block; 125. a connecting mechanism; 1201. a guide groove; 1202. a limiting groove; 20. a pull rod; 201. a threaded hole; 21. a rod portion; 22. a head portion; 23. a handle part; 30. a handle; 40. a cutter head; 41. a tapered portion; 42. an extension portion; 401. fixing grooves; 402. a side hole; 90. a connector; 901. a jack; 902. a clamping groove; 91. and (7) inserting the terminals.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "head end", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1, the present invention provides a connection structure 10, the connection structure 10 can be used for pulling a connector 90 (see fig. 8) of a blood pump out of a body, the connection structure 10 can connect the connector 90 of the blood pump and a pull rod 20, and therefore 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 member that can be inserted into a human tissue and is used for pulling by an operator applying a pulling force to the outside of the body. The connecting structure 10 includes a first connecting member 11 and a second connecting member 12.

Referring to fig. 2, the first connecting member 11 has a connecting hole 101. Specifically, the first connecting member 11 includes a cylindrical portion having a closed end and an open end, and the connecting hole 101 is opened at the closed end. Wherein the connection hole 101 communicates with the inner hole of the cylindrical portion. In the illustrated embodiment, the first connecting member 11 is a cylindrical portion, and it is understood that in other embodiments, the first connecting member 11 may include other structures besides the cylindrical portion, or the first connecting member 11 may not include the cylindrical portion, and the first connecting member 11 may have other structures with the connecting hole 101. The cylindrical portion is used for connecting with the pull rod 20, and may be specifically connected by a screw thread, for example, by providing an internal thread to be screwed with the pull rod 20 or by providing an external thread to be screwed with the pull rod 20.

In one embodiment, the cylindrical part is made of stainless steel, so that the cylindrical part not only has better strength, but also has longer service life.

Referring to fig. 3 and 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 detachably connected to the connector 90 of the blood pump, a maximum outer diameter of the connecting mechanism 125 is larger than a bore diameter of the connecting hole 101, the connecting rod 122 is inserted into the connecting hole 101, and the connecting rod 122 can swing relative to a central axis of the connecting hole 101. One end of the connecting rod 122 is connected with the connecting mechanism 125, the limiting cap 121 is connected with the other end of the connecting rod 122, and the limiting cap 121 and the connecting mechanism 125 can jointly prevent the connecting rod 122 from being separated 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, so that when the connecting rod 122 is inserted into 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 moving space in both the axial direction and the radial direction to swing relative to the central axis of the connecting hole 101. The connection mechanism 125 and the limiting cap 121 limit the first connection member 11 to prevent the first connection member 11 from being separated from the second connection member 12.

The connecting rod 122 may be in a shape of a prism, a cylinder, or an elliptic cylinder, i.e., a cross section along the extending direction thereof is square or rectangular, or the connecting rod 122 may be in a shape of a prism, a circular truncated cone, or an elliptic truncated cone, i.e., a cross section along the extending direction thereof is trapezoidal. The maximum outer diameter of the connecting rod 122 means the maximum of all distances between each point on the outer wall of the connecting rod 122 and the other points on the cross section where the point is located. In the illustrated embodiment, the connecting rod 122 is a smooth cylindrical rod. The stopper cap 121 is housed in the cylindrical portion.

After the blood pump is implanted into a human body, the connector 90 of the blood pump needs to be pulled out of the body so as to be electrically connected with the connector 90 of an external controller, so that the controller is electrically connected with the blood pump. In the present embodiment, the pull rod 20 and the connector 90 of the blood pump are respectively connected to the first connector 11 and the second connector 12 (see fig. 8), and the connector 90 is pulled out of the body by pulling the pull rod 20. Because the connecting rod 122 can swing for the central axis of the connecting hole 101, the first connecting piece 11 and the second connecting piece 12 can move flexibly relative to each other, which is more flexible, and not only can be used for conveniently connecting the pulling rod 20 and the first connecting piece 11, but also can be used for conveniently connecting the second connecting piece 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, the connecting mechanism 125 and the position-limiting cap 121 are both fixed to the connecting rod 122. More specifically, referring to fig. 3, the connecting mechanism 125 includes a connecting seat 123 and a connecting head 124, the connecting seat 123 is fixedly connected to an end of the connecting rod 122 far away from the limiting cap 121, a maximum outer diameter of the connecting seat 123 is larger than an aperture of the connecting hole 101, the connecting head 124 is mounted on the connecting seat 123, and the connecting head 124 can be detachably connected to the connector 90. So that the connecting socket 123 and the connector 90 can be connected by the connecting 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 connecting seat 123, the connecting rod 122 and the limiting cap 121 are made of stainless steel, so that the second connecting member 12 has not only better strength but also longer service life.

In the illustrated embodiment, the connecting seat 123 includes a cylindrical structure with an open end and a closed end, 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 the connecting head 124 is at least partially accommodated in the cylindrical structure. Specifically, in the illustrated embodiment, the connection seat 123 is a cylindrical structure, and it is understood that in other embodiments, the connection seat 123 may include other structures besides the cylindrical structure, or the connection seat 123 may also include other structures without the cylindrical structure.

Referring to fig. 5, specifically, the connection head 124 includes a connection body 1241, the connection body 1241 is fixedly connected to the connection seat 123, and the connection body 1241 can be detachably connected to the blood pump connector 90.

Referring to fig. 3 and 4 again, the connecting base 123 further includes a fastening protrusion 1231 disposed on the inner wall of the cylindrical structure, and the connecting body 1241 is fastened to the fastening protrusion 1231.

The side wall of the connecting 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 connecting body 1241, the guide groove 1201 extends along the axial direction of the connecting body 1241, the guide groove 1201 is communicated with the limit groove 1202, the clamping protrusion 1231 is clamped with the limit groove 1202 to prevent the connecting body 1241 from separating from the connecting seat 123, and the clamping protrusion 1231 can slide into the limit groove 1202 from the guide groove 1201. Specifically, the width of the guide groove 1201 in the circumferential direction of the connecting body 1241 is not less than the width of the engaging protrusion 1231 in the circumferential direction of the connecting base 123, and the width of the limiting groove 1202 in the axial direction of the connecting body 1241 is not less than the width of the engaging protrusion 1231 in the axial direction of the connecting base 123, so that the engaging protrusion 1231 can slide into the limiting groove 1202 from the guide groove 1201.

The assembly of the connecting body 1241 and the connecting socket 123 can be simply realized by adopting the connecting body 1241 and the connecting socket 123 having the above-mentioned structures, and then, the assembly manner of the connecting body 1241 and the connecting socket 123 is specifically as follows: firstly, the clamping protrusion 1231 is aligned with the guide groove 1201, and then the connecting body 1241 is inserted into the connecting seat 123, at this time, the clamping protrusion 1231 slides into the limit groove 1202 along the extending direction of the guide groove 1201, the connecting body 1241 is rotated, the clamping protrusion 1231 slides along the extending direction of the limit groove 1202 until the clamping protrusion 1231 is dislocated with the guide groove 1201, namely, the clamping of the connecting body 1241 and the connecting seat 123 is realized, so that when the connecting body 1241 and/or the connecting seat 123 are/is pulled along the axial direction, the groove wall of the limit groove 1202 abuts against the clamping protrusion 1231 to limit the axial movement of the connecting body 1241, and the connecting body 1241 is prevented from being separated from the connecting seat 123. Preferably, the engaging protrusion 1231 is attached to both sidewalls of the limiting groove 1202. A plurality of engaging protrusions 1231 may be disposed at intervals, correspondingly, a plurality of guide grooves 1201 are disposed, and the positions of the guide grooves 1201 correspond to the positions of the engaging protrusions 1231, respectively.

More specifically, in this embodiment, the connecting body 1241 has a fixed end fixedly connected to the connecting seat 123 and a connecting end capable of being detachably connected to the connector 90, two annular protrusions 1243 are circumferentially disposed on an outer wall of the connecting body 1241, the two annular protrusions 1243 are axially spaced apart from each other, a limiting groove 1202 is formed between the two annular protrusions 1243, and the guide groove 1201 is opened on the annular protrusion 1243 near the fixed end of the connecting body 1241 and penetrates through two axial side walls of the annular protrusion 1243.

In order to further fasten the connection between the connecting body 1241 and the connecting socket 123, an adhesive may be applied on the fixing end and/or the connecting socket 123, so that after the connecting body 1241 is fastened with the connecting socket 123 by the fastening protrusion 1231, the connecting body 1241 and the connecting socket 123 are adhered by the adhesive, thereby preventing the connecting body 1241 from being separated from the connecting socket 123, and particularly reducing the risk caused by accidental loosening during the use process.

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

In order to further prevent the connection head 124 from being separated from the blood pump connector 90, particularly, the connection head 124 and the connector 90 connected by a plugging manner are separated, the connection head 124 further includes a rotating member 1242 rotatably connected to the connection body 1241, the rotating member 1242 is provided with a latching groove 902 capable of being connected with the connector 90 (see fig. 7, generally, the blood pump connector 90 has a plugging end 91, the plugging end 91 is provided with a plug hole 901 for electrically connecting with another connector, a connection end of the connection body 1241 can be inserted into the plug hole 901 to realize the plugging of the connection body 1241 and the connector 90, an outer edge of the plugging end 91 of the connector 90 is generally provided with a latching groove 902, the latching groove 902 is a groove for realizing the latching with another connector, generally, the latching groove 902 is a latching bump 1244 which is in a hook shape), and the rotating member 1242 can rotate relative to the connection body 1241 to enable the latching bump 902 to be latched or separated with the latching groove 902. Specifically, the rotating component 1242 can be rotatably sleeved outside the connecting body 1241 and is spaced from the outer wall of the connecting end to form a gap for accommodating the outer edge of the plugging end 91. The engaging protrusion 1244 is provided on an inner wall of the rotating member 1242.

When the connection head 124 is connected to the connector 90 of the blood pump, the rotation member 1242 is rotated to align the engaging protrusion 1244 with the engaging slot 902, and then the connection end of the connection body 1241 is inserted into the insertion hole 901 of the connector 90, at this time, the engaging protrusion 1244 also slides into the engaging slot 902, the rotation member 1242 is released, the rotation member 1242 is reset, at this time, the engaging protrusion 1244 slides into the hook-shaped portion of the engaging slot 902 and engages with the engaging slot 902 to prevent the connection head 124 from being disengaged from the connector 90.

Further, the connector 124 also has a waterproof structure, and when the connector 124 is connected to the connector 90, the waterproof structure can prevent blood from entering the connector 90, thereby avoiding a situation of poor connection of the connector 90.

Specifically, the connecting head 124 is a waterproof connector that can mate with the connector 90.

Further, the swing angle of the connecting rod 122 is less than or equal to 40 °. That is, the second link 12 can swing with respect to the first link 11 within a range of 40 ° from the central axis of the connection hole 101.

Referring to fig. 3 again, the maximum outer diameter of the position-limiting cap 121 is smaller than the inner diameter of the cylindrical portion, so that when the position-limiting cap 121 enters the cylindrical portion through the connecting hole 101, a certain moving space is left between the position-limiting cap 121 and the inner wall of the cylindrical portion, so that the position-limiting cap 121 can swing in the inner hole of the cylindrical portion. Preferably, the length of the cylindrical portion is greater than the length of the stopper cap 121 in the axial direction of the cylindrical portion, so that the stopper cap 121 is completely received in the cylindrical portion and is not knocked by the outside.

In the illustrated embodiment, in order to facilitate the assembly of the first connecting member 11 and the second connecting member 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, please refer to fig. 2 and 3, an external thread 1211 is provided on the limiting cap 121, and a hole wall of the connecting hole 101 is provided with a matching thread 111 matched with the external thread 1211. Specifically, the stopper cap 121 has a cylindrical shape and is coaxially disposed with the connecting rod 122, and the external thread 1211 is disposed in a circumferential direction of the stopper cap 121. Then, the maximum outer diameter of the stopper cap 121 means the outer diameter of the external thread 1211. Wherein the aperture of the coupling hole 101 refers to the inner diameter of the mating thread 111. The engagement of the engaging screw 111 and the external screw 1211 enables the stopper cap 121 to be received in the inner hole of the cylindrical portion from the outside of the cylindrical portion through the connecting hole 101, thereby allowing the connecting rod 122 to be inserted into the connecting hole 101, and enabling the first connecting member 11 and the second connecting member 12 to be movably connected.

Then, the assembly operation of the first connecting member 11 and the second connecting member 12 may be achieved as follows:

the central axis of the limiting cap 121 is aligned with the central axis of the connecting hole 101, then one of the first connecting piece 11 and the second connecting piece 12 is rotated, so that the external thread 1211 of the limiting cap 121 is in threaded fit with the matching thread 111 of the first connecting piece 11, in the process of threaded fit, the limiting cap 121 gradually passes through the connecting hole 101 until the external thread 1211 of the limiting cap 121 is separated from the matching thread 111 of the first connecting piece 11, at the moment, the connecting rod 122 penetrates through the connecting hole 101, the external thread 1211 of the limiting cap 121 is abutted against the edge of the connecting hole 101, so that the limiting cap 121 is prevented from penetrating through the connecting hole 101, and the connection of the first connecting piece 11 and the second connecting piece 12 is realized. If the first connecting piece 11 is to be separated from the second connecting piece 12, the central axis of the limiting cap 121 is aligned with the central axis of the connecting hole 101 to be overlapped, and then one of the first connecting piece 11 and the second connecting piece 12 is rotated in the opposite direction, so that the external thread 1211 of the limiting cap 121 is in threaded fit with the matching thread 111 of the connecting hole 101 again, in the process of threaded fit, the limiting cap 121 gradually penetrates through the connecting hole 101 until the external thread 1211 of the limiting cap 121 is separated from the matching thread 111 of the first connecting piece 11, at this time, the limiting cap 121 is separated 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 separation of the position-limiting cap 121 from the connecting hole 101 requires complicated operation steps, and the position-limiting cap 121 and the first connecting member 11 cannot move and separate from the connecting hole 101 in the axial direction without alignment and rotation. That is, if the operation is not manually performed intentionally, the stopper cap 121 cannot be accidentally removed from the connecting hole 101, so that the reliability is high, and the risk of separation between the first connecting member 11 and the second connecting member 12 is low. The first connecting piece 11 and the second connecting piece 12 which are connected in this way can be made of rigid materials with good strength, such as stainless steel, so that the connecting structure 10 has a long service life, is not easy to break and the like, so as to reduce surgical risks, facilitate replacement of the first connecting piece 11 or the second connecting piece 12, and reduce resource waste. In addition, by adopting the connection mode, the limiting cap 121, the connecting seat 123 and the connecting rod 122 can be in an integrally formed structure, so that the manufacturing and assembling of the connecting structure 10 can be simplified, the risk of loosening is reduced for the form that single small elements are assembled together by the integrally formed structure, and the operation risk can be further reduced.

It should be noted that, in order to facilitate the assembly of the first connecting member 11 and the second connecting member 12 while the limiting cap 121 and the connecting mechanism 125 jointly prevent the connecting rod 122 from separating from the connecting hole 101, the above method is not limited, in other embodiments, the limiting cap 121 is fixedly connected to the connecting rod 111 and is an elastic member, the maximum outer diameter of the limiting cap 121 is larger than the aperture of the connecting hole 101 to prevent the connecting rod 111 from separating from the connecting hole 101, the limiting cap 121 can elastically deform, and the limiting cap 121 can pass through the connecting hole 101 when elastically deformed. At this time, the position limiting cap 121 is made of an elastic material, the position limiting cap 121 has a compressed state in which it is compressed in the radial direction of the connecting rod 122 and generates an elastic force, and a released state in which it releases the elastic force in the radial direction of the connecting rod 122, and the position limiting cap 121 is switched from the released state to the compressed state when it is pressed by an external force, and from the compressed state to the released state when the external force is removed. When the limiting cap 121 is in a compressed state, the maximum outer diameter of the limiting cap is smaller than or equal to the aperture of the connecting hole 101, and when the limiting cap 121 is in a released state, the maximum outer diameter of the limiting cap is larger than the aperture of the connecting hole 101. It should be noted that, because the limiting cap 121 is compressible, the bore diameter of the inner bore of the cylindrical portion only needs to be larger than the maximum outer diameter of the limiting cap 121 in the compressed state, and when the limiting cap 121 is in the expanded state, the outer wall thereof can elastically abut against the bore wall of the inner bore of the cylindrical portion. For example, the limiting cap 121 may be an arrow-shaped elastic sheet, and the arrow direction of the elastic sheet faces away from the connecting rod 122. When the first connecting piece 11 and the second connecting piece 12 need to be assembled, the limiting cap 121 can penetrate into the connecting hole 101 along the arrow direction, in the process that the limiting cap 121 penetrates, the elastic sheet is elastically deformed and elastically abuts against the hole wall of the connecting hole 101, at the moment, the limiting cap 121 is in a compression state, when the limiting cap 121 penetrates through the connecting hole 101 and enters the cylindrical portion, because the hole diameter of the cylindrical portion is larger than that of the connecting hole, the arrow-shaped elastic sheet releases elastic force and opens outwards, at the moment, the limiting cap 121 is switched to a release state from the compression state, namely, the maximum diameter length of the limiting cap 121 is larger than that of the connecting hole 101, the elastic sheet can be arranged at intervals with the hole wall of the cylindrical portion, and can also abut against the hole wall of the cylindrical. If the limiting cap is pulled out from the connecting hole reversely, the distance between the arrow-shaped spring pieces is larger than the aperture of the connecting hole 101, so that the spring pieces can be abutted against the inner end surface of the closed end of the cylindrical part and cannot enter the connecting hole 101, and the first connecting piece 11 and the second connecting piece 12 are prevented from being separated accidentally.

Alternatively, the position limiting cap 121 may be a bladder-shaped structure which is made of a flexible material and has a cavity capable of being filled with a medium. The stopper cap 121 has a contracted state before being filled with a medium and an expanded state after being filled with a medium. The medium may be a gas, a liquid or solid particles. The maximum outer diameter of the sac-like structure is smaller than the diameter of the connecting hole 101 in the contracted state, and larger than the diameter of the connecting hole 101 in the expanded state. Thus, the stop cap 121 can be deformed to pass through the connection hole 101, that is, when the stop cap 121 needs to pass through the connection hole 101, the stop cap 121 can be switched to the contracted state by removing the medium in the capsule structure or taking out a part of the medium from the capsule structure in the expanded state, and the capsule structure can pass through the connection hole 101 to enter the inner hole of the cylindrical part. When the limiting cap 121 is required to limit, media can be filled into the capsular structure until the capsular structure is switched from the contraction state to the expansion state, and at this time, the maximum outer diameter of the limiting cap 121 is larger than the aperture of the connecting hole 101, so that the limiting cap is prevented from being separated from the connecting hole 101. Similarly, since the bag-like structure is deformable, when the stopper cap 121 is in the expanded state, it can be fitted to the hole wall of the cylindrical portion.

In addition, in order to facilitate the assembly of the first connecting member 11 and the second connecting member 12 while achieving the effect that the stopper cap 121 and the connecting mechanism 125 together prevent the connecting rod 122 from being separated from the connecting hole 101, in other embodiments, at least one of the connecting seat 123 and the stopper cap 121 may be detachably connected to the connecting rod 122, and then, the assembly operation of the first connecting member 11 and the second connecting member 12 may be achieved as follows:

if the connecting rod 122 is detachably connected with the connecting mechanism 125 and fixedly connected with the limiting cap 121, when assembly is required, the connecting rod 122 can penetrate through the connecting hole 101 along the direction back to the limiting cap 121, and then the connecting rod 122 is detachably connected with the connecting mechanism 125 at the other side of the connecting hole 101. When disassembly is required, the connecting rod 122 can be removed from the connecting hole 101 in the reverse direction of the installation path by simply detaching the connecting mechanism 125 from the other end of the connecting rod 122. Wherein, the detachable connection mode can be screw connection, clamping connection and the like.

If the connecting rod 122 is detachably connected with the limiting cap 121 and fixedly connected with the connecting mechanism 125, when the device is needed, the connecting rod 122 can penetrate through the connecting hole 101 along the direction back to the connecting mechanism 125, and then the connecting rod 122 is detachably connected with the limiting cap 121 on the other side of the connecting hole 101. When the connection rod 122 needs to be detached, the connection rod 122 can be pulled out from the connection hole 101 along the installation path in the reverse direction only by detaching the limiting cap 121 from the other end of the connection rod 122. Wherein, the detachable connection mode can be screw connection, clamping connection and the like.

Referring to fig. 8 and 9, the present embodiment provides a wire pulling device, which includes a pulling rod 20, a handle 30, and the connecting structure 10 mentioned in any of the above embodiments. The pull rod 20 is capable of penetrating human tissue and detachably connected to the first connector 11, and the user pulls the connector 90 out of the body by pulling the pull rod 20 from 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, wherein the rod portion 21 can be bent, and the pull rod 20 is made of stainless steel, so that the pull rod 20 is not only convenient to penetrate through human tissues, 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 internal thread 112 is provided on an end of the cylindrical portion near the open end, the tie rod 20 can be partially received in the cylindrical portion and threadedly engaged with the internal thread 112, and preferably, the head portion 22 of the tie rod 20 is fully or partially received in the cylindrical portion and threadedly engaged with the internal thread 112.

The handle portion 23 is opened with a threaded hole 201, and the handle 30 is inserted into the threaded hole 201 and is in threaded connection with 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 into the threaded hole 201 and is in threaded connection with the handle portion 23. The handle 30 is bar-shaped and is used for a user to hold to pull the pull rod 20.

The pulling device further comprises a cutter head 40, and the cutter head 40 can be detachably connected with the pull rod 20. When the pull rod 20 needs to be penetrated from the outside of the body to the inside of the body, the pull rod 20 can be more conveniently penetrated into the tissue through the cutter head 40.

Referring to fig. 10 and 11, the cutting head 40 includes a tapered portion 41 and an extending portion 42 extending from a large end of the tapered portion 41 in a direction away from the tapered portion 41, the extending portion 42 can be detachably connected to the first connecting member 11, so that when a user pushes the pull rod 20 into the body, a tip end of the tapered portion 41 faces in a forward direction, and the tapered portion 41 can reduce resistance of the cutting head 40 to enter, thereby facilitating the cutting head 40 to penetrate through tissue.

Referring to fig. 10 and 11 again, in the illustrated embodiment, the cutting head 40 is provided with a fixing groove 401, the fixing groove 401 extends from an end surface of one end of the extending portion 42 away from the tapered portion 41 toward the tapered portion 41, and the pull rod 20 can be partially received in the fixing groove 401 and detachably connected to the cutting head 40. Specifically, the head 22 of the drawbar 20 can be wholly or partially received in the fixing groove 401 and threadedly engaged with the tool bit 40. The material of tool bit 40 is stainless steel to make tool bit 40 not only have better intensity, still have longer life.

In order to facilitate the cleaning and disinfection of the cutter head 40, in the present embodiment, the cutter head 40 is provided with a side hole 402 extending in the radial direction of the cutter head 40, the side hole 402 penetrates through the side wall of the cutter head 40 and communicates with the fixing groove 401, and the hole wall of the side hole 402 is co-cambered with the bottom wall of the fixing groove 401. Therefore, the fixing groove 401 can be comprehensively cleaned and disinfected through the side hole 402 without cleaning dead corners, and blood entering the groove bottom of the fixing groove 401 can flow out of the cutter head 40 through the side hole 402, so that the amount of blood remaining in the fixing groove 401 is reduced, and pollution is reduced.

When the blood pump connector is used, the cutter head 40 is firstly installed on the head portion 22 of the pull rod 20, the pull rod 20 penetrates into the body from the outside of the body, when the head portion 22 reaches the position close to the blood pump connector 90, the cutter head 40 is detached, the first connecting piece 11 is connected with the head portion of the pull rod 20, the connecting head 124 of the second connecting piece 12 is connected with the blood pump connector 90, therefore, the connection of the pull rod 20 and the connector 90 is achieved through the connecting structure 10, and a user pulls the pull rod 20 from the outside of the body to pull the connector 90 out of the body from the body.

In other embodiments, the first connecting member 11 may be detachably connected to the connector 90, and the second connecting member 12 may be detachably connected to the head 22 of the drawbar 20.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A connecting structure, characterized by comprising:

the first connecting piece is provided with a connecting hole;

the second connecting piece, including coupling mechanism, connecting rod and spacing cap, coupling mechanism is used for being connected with connector detachably, coupling mechanism's maximum external diameter is greater than the aperture of connecting hole, the connecting rod is worn to locate the connecting hole, just the connecting rod can be relative the central axis swing of connecting hole, the one end of connecting rod with coupling mechanism connects, spacing cap with the other end of connecting rod is connected, spacing cap with coupling mechanism can stop jointly the connecting rod breaks away from the connecting hole.

2. The connecting structure according to claim 1, wherein the connecting mechanism and the limiting cap are fixedly connected with the connecting rod, the limiting cap is provided with an external thread, and the hole wall of the connecting hole is provided with a matching thread matched with the external thread;

or the limiting cap is an elastic part, the maximum outer diameter of the limiting cap is larger than the aperture of the connecting hole so as to prevent the connecting rod from being separated from the connecting hole, the limiting cap can elastically deform, and the limiting cap can penetrate through the connecting hole when elastically deforming;

or at least one of the connecting seat and the limiting cap is detachably connected with 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 one end of the connecting rod, which is far away from the limiting cap, the maximum outer diameter of the connecting seat is larger than the aperture of the connecting hole, the connecting head is mounted on the connecting seat, and the connecting head can be detachably connected with the connector.

4. The connecting structure according to claim 3, wherein the connecting base includes a cylindrical structure with an open end and a closed end, 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 accommodated in the cylindrical structure.

5. The connecting structure according to claim 3, wherein 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, the connecting body is detachably connected to the connector, the rotating member is provided with a locking protrusion capable of locking with a locking groove of the connector, and the rotating member is capable of rotating relative to the connecting body to lock or unlock the locking protrusion with or from the locking groove;

and/or the connector is a waterproof connector capable of being matched with the male connector and the female connector.

6. The connecting structure according to claim 1, wherein 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 stopper cap is accommodated in the cylindrical portion.

7. A cable pulling device, comprising a pull rod and a connecting structure as claimed in any one of claims 1 to 6, wherein the pull rod is detachably connectable to the first connecting member.

8. The cable pulling device as defined in claim 7, further comprising a cutter head, the cutter head including a tapered portion and an extension extending from a larger end of the tapered portion in a direction away from the tapered portion, the extension being detachably connectable to the first connector.

9. The wire pulling device according to claim 8, wherein the tool bit has a fixing groove formed therein, the fixing groove extending from an end surface of the extension portion at an end thereof remote from the tapered portion toward the tapered portion, the tool bit further having a side hole extending in a radial direction, the side hole penetrating through a side wall of the tool bit and communicating with the fixing groove, and a hole wall of the side hole being co-arc with a bottom wall of the fixing groove, wherein the pull rod is partially received in the fixing groove and detachably connected to the tool bit.

10. The wire pulling device as claimed in any one of claims 7 to 9, wherein the pull rod is provided with a threaded hole, the wire pulling device further comprises a handle, and the handle is inserted into the threaded hole and is in threaded connection with the pull rod;

and/or the first connecting piece can be in threaded connection with the pull rod.

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