CN116914479A

CN116914479A - Connector and ventricular assist system

Info

Publication number: CN116914479A
Application number: CN202310732053.1A
Authority: CN
Inventors: 倪斌庆; 谢端卿; 余顺周
Original assignee: Shenzhen Core Medical Technology Co Ltd
Current assignee: Shenzhen Core Medical Technology Co Ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-10-20

Abstract

An embodiment of the present application provides a connector including: a connector; the conductive structure is fixed with the connector; the cable comprises a wire core, wherein the wire core is provided with a first end and a second end which are oppositely arranged, and the second end is electrically connected with the conductive structure; and the first fixing piece is fixedly connected with the wire core and the connector, and the position of the first fixing piece fixedly connected with the wire core is located between the first end and the second end. The technical scheme provided by the embodiment of the application can reduce the risk of failure of the electric connection between the cable and the connector.

Description

Connector and ventricular assist system

Technical Field

The application relates to the technical field of medical instruments, in particular to a connector and a ventricular assist system.

Background

When the blood pump is implanted into a human body, the blood pump needs to be electrically connected with an external controller, in general, the blood pump is connected with one connector through a cable, the external controller is connected with the other connector through another cable, and the two connectors are connected together, so that the blood pump and the controller are electrically connected.

However, in use it has been found that when the cable is pulled by an external force, it can lead to a risk of failure of the electrical connection of the cable to the connector, resulting in disconnection of the blood pump and the controller and failure of the blood pump control.

Disclosure of Invention

In view of the foregoing, embodiments of the present application are presented to provide a connector and a ventricular assist system that can reduce the risk of failure of the electrical connection between the cable and the connector.

An embodiment of the present application provides a connector including:

a connector;

the conductive structure is fixed with the connector;

the cable comprises a wire core, wherein the wire core is provided with a first end and a second end which are oppositely arranged, and the second end is electrically connected with the conductive structure; the method comprises the steps of,

the first fixing piece is fixedly connected with the wire core and the connector, and the position of the first fixing piece fixedly connected with the wire core is located between the first end and the second end.

Optionally, the first fixing piece is annular and is tightly sleeved on the wire core.

Optionally, the first fixing piece is a non-closed annular structure.

Optionally, the cable further comprises a kevlar layer, the kevlar layer is wrapped outside the wire core, the kevlar layer comprises a first layer of fiber and a second layer of fiber formed by folding in half, and the first layer of fiber is positioned between the second layer of fiber and the wire core;

the connector comprises a plurality of first fixing pieces, at least one first fixing piece is tightly sleeved on the first layer of fibers and is positioned between the first layer of fibers and the second layer of fibers; at least one first fixing piece is closely sleeved outside the second layer of fibers.

Optionally, the first fixing element is a ductile metal element.

Optionally, the first fixing piece is a copper sleeve.

Optionally, the connector includes a main body portion and an inner connecting sleeve, and the conductive structure is fixed with the main body portion; the inner connecting sleeve surrounds the cable and the first fixing piece, the first fixing piece is fixed with the inner connecting sleeve, and the main body part is fixed with one end of the inner connecting sleeve.

Optionally, the inner connecting sleeve is integrally injection molded on the cable and the main body, and the inner connecting sleeve wraps the first fixing piece and the cable; and/or the number of the groups of groups,

the connector also comprises an outer connecting sleeve, the outer connecting sleeve is sleeved outside the inner connecting sleeve, the outer connecting sleeve extends to cross the inner connecting sleeve in the direction of the second end pointing to the first end, the cable is tightly wrapped by the outer connecting sleeve, and the outer connecting sleeve is a soft rubber piece.

Optionally, the inner peripheral wall of the outer connecting sleeve and the outer peripheral wall of the inner connecting sleeve are respectively arranged in a concave-convex manner to form a mutual engagement structure.

Optionally, the cable further includes an insulating sheath, the wire core includes a first wire segment and a second wire segment, the first wire segment is wrapped by the insulating sheath, the second wire segment is located outside the insulating sheath, the second wire segment has the first end and the second end, and the first end is connected with the first wire segment;

The connector further includes a second fixing member fixedly connecting the first end and the insulating sheath.

Optionally, the second fixing piece includes a first sleeving section with a smaller inner diameter and a second sleeving section with a larger inner diameter, the first sleeving section is tightly sleeved outside the first end, and the second sleeving section is tightly sleeved outside the insulating sheath.

Optionally, the connector further comprises a main body part and an inner connecting sleeve, and the conductive structure is fixed with the main body part;

the inner connecting sleeve is integrally formed in the cable and the main body part in an injection mode, the inner connecting sleeve wraps the first fixing piece, the second line segment and part of the insulating sheath, the hardness of the inner connecting sleeve is larger than that of the insulating sheath, and the second fixing piece is a ductile metal piece.

Optionally, the first fixing piece is tightly sleeved outside the first sleeving section.

Optionally, the connector further comprises an inner connecting sleeve and an outer connecting sleeve, wherein the inner connecting sleeve tightly wraps the cable, and the inner connecting sleeve is a hard rubber piece;

the outer connecting sleeve is sleeved outside the inner connecting sleeve, extends to cross the inner connecting sleeve in the direction of the second end pointing to the first end and tightly wraps the cable, and is a soft rubber piece;

The connector further comprises a third fixing piece located between the inner connecting sleeve and the outer connecting sleeve, the third fixing piece is a ductile metal piece, the third fixing piece comprises a first sleeve body and a second sleeve body, the first sleeve body is tightly sleeved on the outer peripheral surface of the inner connecting sleeve, the second sleeve body is connected with one end, far away from the conductive structure, of the first sleeve body, the cable is tightly sleeved on the second sleeve body, and the second sleeve body is further wrapped by the outer connecting sleeve.

Optionally, the second sleeve body includes a first section and a second section, one end of the first section is connected with the first sleeve body, the other end of the first section is connected with the second section, a gap is formed between the first section and the cable, and the second section is tightly sleeved on the cable;

the connector further comprises an elastic piece sleeved outside the cable, one part of the elastic piece is fixed with the inner connecting sleeve, and the other part of the elastic piece is located in the gap.

Optionally, the connector further comprises an inner connecting sleeve, the inner connecting sleeve tightly wrapping the cable; the connector further comprises an elastic piece sleeved outside the cable, one part of the elastic piece is tightly sleeved by the inner connecting sleeve, the other part of the elastic piece is exposed out of the inner connecting sleeve in a direction away from the second end, and the first fixing piece is located between the elastic piece and the second end.

Optionally, the elastic piece is a spring, an elastic sleeve or a soft rubber sleeve.

The embodiment of the application also provides a ventricular assist system, which comprises a blood pump, a controller and a connector, wherein one end of the connector is connected with the blood pump through one cable, and the other end of the connector is connected with the controller through the other cable.

The inventor researches find that: in general, the cable includes the sinle silk and wraps up the insulating crust of sinle silk, and not absolute relative fixed between sinle silk and the insulating crust, when the cable receives external force to be pulled, can remove relative insulating crust, and then lead to the hookup location disconnection of sinle silk and connector, lead to blood pump and controller to lose connection. In the technical scheme of the embodiment of the application, a contact position is formed between the second end of the wire core and the conductive structure, and a fixed position is formed between the wire core and the connector at the first fixing piece. When the wire core is pulled from the second end to the first end, or the cable is bent at the position with the insulating sheath, the wire core is stressed at the fixed position, and the first fixing piece transfers the stress of the wire core at the fixed position to the connecting head, so that the contact position is not affected by external force basically, the risk that the second end of the wire core is disconnected from the conductive structure at the contact position is reduced, and the stability of the electrical contact of the wire core and the conductive structure is further ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a part of a connector according to an embodiment of the present application;

FIG. 2 is a schematic view of the connector of FIG. 1 from another perspective;

FIG. 3 is a schematic cross-sectional view of the connector of FIG. 1;

FIG. 4 is a schematic view of the first fixing member shown in FIG. 3;

FIG. 5 is a schematic plan view of the first fixing member of FIG. 4;

FIG. 6 is a schematic view illustrating the first fastener and the Kevlar layer of FIG. 3;

FIG. 7 is a schematic view of the second fixing member shown in FIG. 3;

FIG. 8 is a schematic cross-sectional view of the second mount of FIG. 7;

FIG. 9 is a schematic view of the third fixing member shown in FIG. 3;

FIG. 10 is a schematic cross-sectional view of the third mount of FIG. 9;

FIG. 11 is a schematic view of the inner coupling sleeve of FIG. 3;

FIG. 12 is a schematic view of the inner joint sleeve of FIG. 11 from another perspective;

FIG. 13 is a schematic plan view of the inner coupling sleeve of FIG. 12;

FIG. 14 is a schematic view of the outer adapter sleeve of FIG. 3;

fig. 15 is a schematic view of the outer adapter sleeve of fig. 14 in cross-section.

Reference numerals:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Connector with a plurality of connectors	31	Wire core	51	First sleeve joint section
10	Connector head	311	First line segment	52	Second sleeve joint section
						11	Main body part	312	Second line segment	60	Third fixing piece
12	Inner connecting sleeve	3121	First end	61	First sleeve body
						121	Groove	3122	Second end	62	Second sleeve body
122	Arc-shaped section	32	Insulating sheath	621	First section
						123	Straight line segment	33	Kevlar layer	622	Second section
13	External connecting sleeve	331	First layer of fibers	623	Step surface
						131	Protrusions	332	Second layer of fibers	70	Elastic piece
20	Conductive structure	40	First fixing piece	10a	Male head
						30	Cable with improved heat dissipation	50	Second fixing piece	10b	Female head

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the embodiments of the present disclosure.

It should be noted that, in the description of the present application, if the terms "first," "second," and the like are used merely for convenience in describing different components or names, they should not be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme where a and B meet at the same time.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Referring to fig. 1, an embodiment of the present application provides a connector 100 for connecting a controller (not shown) and a blood pump (not shown) in a ventricular assist system, such that the controller and the blood pump can be electrically connected through the connector 100, thereby achieving control and power supply of the blood pump. It will be appreciated that in other embodiments, the connector 100 may also be used to connect two other removable components.

Referring to fig. 1 to 3 in combination, a connector 100 according to an embodiment of the present application includes a header 10, a conductive structure 20, and a cable 30, wherein the header 10 may be a male header 10a or a female header 10b. Only a part of the structure of the male 10a is shown in fig. 1 to 3, and the conductive structure 20 shown in fig. 2 is a conductive structure of the male 10 a.

Specifically, the conductive structure 20 is fixed to the connector 10, the cable 30 includes a core 31, the core 31 has a first end 3121 and a second end 3122 disposed opposite to each other, and the second end 3122 is electrically connected to the conductive structure 20.

Referring to fig. 3 to 5 in combination, the connector 100 in the embodiment of the application further includes a first fixing member 40, where the first fixing member 40 is fixedly connected to the wire core 31 and the connector 10, and a position where the first fixing member 40 is fixedly connected to the wire core 31 is located between the first end 3121 and the second end 3122, so as to avoid a position stress of the electrical connection between the second end 3122 and the conductive structure 20 when the wire core 30 is pulled away from the conductive structure 20.

In the technical solution of the embodiment of the present application, a contact position is formed between the second end 3122 of the wire core 31 and the conductive structure 20, and a fixing position is formed between the wire core 31 and the connector 10 at the first fixing member 40. When the wire core 31 is pulled from the second end 3122 to the first end 3121 or the cable 30 is bent, the wire core 31 will be stressed at the fixing position, and the first fixing member 40 transfers the stress of the wire core 31 at the fixing position to the connector 10, so that the contact position is not affected by external force, thereby protecting the second end 3122 of the wire core 31 from being disconnected from the conductive structure 20 at the contact position, and further ensuring the stability of the electrical contact between the wire core 31 and the conductive structure 20.

Further, the cable 30 includes a core 31 and an insulating sheath 32, the core 31 includes a first line segment 311 and a second line segment 312, the first line segment 311 is wrapped by the insulating sheath 32, the second line segment 312 is located outside the insulating sheath 32, the second line segment 312 has a first end 3121 and a second end 3122 that are oppositely disposed, the first end 3121 is connected with the first line segment 311, the second end 3122 is electrically connected with the conductive structure 20, and the first fixing member 40 is fixedly connected with the second line segment 312 and the connector 10.

Since the wire core 31 and the insulating sheath 32 are not absolutely fixed relatively, when the cable 30 is pulled by an external force, the cable moves relatively to the insulating sheath 32, and thus the contact position between the second end 3122 of the wire core 31 and the conductive structure 20 is disconnected, and when the connector 100 is applied in a ventricular assist system, the connection between the blood pump and the controller is lost, which affects the life safety. Therefore, the first fixing member 40 is fixedly connected with the second line segment 312 and the connector 10, so as to avoid loosening of the contact position when the wire core 31 is pulled.

The connector 100 in the embodiment of the application may include two connectors 10, one of the two connectors 10 is a male connector 10a and the other connector is a female connector 10b, and the male connector 10a and the female connector 10b are respectively provided with a conductive structure 20, and when the male connector 10a and the female connector 10b are matched, for example, are plugged, the two conductive structures 20 are contacted with each other to realize electrical connection. For example, the connector 100 may be used in a ventricular assist system, the male portion 10a may be connected to a blood pump via a cable 30, and the female portion 10b may be connected to a controller via another cable 30. It will be appreciated that in other embodiments, the male 10a may be used to connect to a controller and the female 10b may be used to connect to a blood pump. The male 10a and the female 10b may have the same structure or different structures, and the two cables 30 may have the same or different structures. The same or different structure of the cable 30 means that the structural shape itself does not include a length parameter. In some embodiments of the present application, the cross-sections of the male 10a and female 10b may be generally circular in configuration.

Since the blood pump is disposed in the body, the cable 30 connected to the blood pump is also substantially located in the body, so that there is less possibility of being pulled. The controller is arranged outside the body, so that the connector 10 and the cable 30 connected with the controller are more easily pulled by external force. Thus, in some embodiments, the connector 10 and the cable 30 connected to the controller may be used in combination with the first fixing member 40 described above, so as to avoid or reduce the risk of breaking the contact position when the core 31 in the cable 30 is subjected to other external forces such as pulling or bending.

Examples of the application are described in further detail below in connection with the detailed description.

In some embodiments, the second end 3122 of the wire core 31 is fixed with the connector 10 or the conductive structure 20, so that the relative fixing of the position between the second end 3122 of the wire core 31 and the conductive structure 20 of the connector 10 is ensured, and further, the stability of the electrical connection between the wire core 31 and the conductive structure 20 is ensured. Wherein the second end 3122 of the core 31 may be directly fixed with the conductive structure 20; alternatively, the second end 3122 of the wire core 31 is fixed with the connector 10, and the second end 3122 of the wire core 31 is only in contact with the conductive structure 20, but not fixed; alternatively, the second end 3122 of the core 31 is fixed with both the joint head 10 and the conductive structure 20.

Specifically, the second end 3122 of the wire core 31 and the conductive structure 20 may be fixed by welding, for example, the second end 3122 of the wire core 31 may be directly welded to the conductive structure 20, so the contact position mentioned above refers to the welding position. Or, the conductive structure 20, the wire core 31 and the connector 10 may be integrally injection molded, and when integrally injection molding, the conductive structure 20 and the wire core 31 are used as inserts, and after the two are contacted, the connector 10 is integrally injection molded.

The wire core 31 is used as a lead and directly transmits an electric signal; the insulating sheath 32 serves as a protective layer for protecting and insulating the inner core 31. The insulating sheath 32 may be made of a relatively soft plastic material, such as silicone.

In some embodiments, the first fixing member 40 is annular and is tightly sleeved on the core 31, that is, the first fixing member 40 is in interference fit with the core 31, so that the first fixing member 40 generates a clamping force on the core 31 to tightly hold the core 31, thereby preventing the first fixing member 40 from being separated from the core 31. The first fixing piece 40 is tightly sleeved on the wire core 31, so that on one hand, the first fixing piece can be fixed in contact with the wire core 31 in the whole circumferential direction of the wire core 31, the contact area is increased, and the fixing effect is improved; on the other hand, the assembling mode of direct sleeving is simpler, and the shape of the wire core 31 is not damaged.

To make the assembly of the first fixing member 40 and the wire core 31 easier and faster, in some embodiments, the first fixing member 40 is a non-closed ring structure. In the present embodiment, in order to match the first fixing member 40 with the size of the core 31, the inner diameter of the first fixing member 40 is smaller than the diameter of the core 31, so it is difficult for the first fixing member 40 of an annular structure to be directly sleeved outside the core 31 and to move axially along the core 31. By providing the first fixing member 40 as a non-closed loop, a greater elastic deformation of the first fixing member 40 can be facilitated, facilitating the assembly of the first fixing member 40 into the core 31.

Specifically, the first fixing member 40 has two ends distributed in the circumferential direction, and in some embodiments, there is a small space between the two ends, so the first fixing member 40 may have a major arc shape. Alternatively, in other embodiments, the first fixing member 40 may be regarded as a closed loop when both ends of the first fixing member 40 are in contact with each other in the original state by cutting a knife on a closed loop to form a slit; when subjected to an external force, the two ends can be separated, i.e. a space is created, so that the first fixing member 40 is more easily sleeved to the core 31.

The first fixing member 40 may be an annular structure formed by an integral part; alternatively, the first fixing member 40 is an annular structure formed by combining at least two parts, for example, the first fixing member 40 includes two semicircular structures, the two semicircular structures are butted to form a circular hole for the wire core 31 to pass through, and the two semicircular structures jointly clamp the wire core 31.

Of course, in other embodiments, the first fixing member 40 may be a closed loop. The first fixing member 40 is not limited to the annular structure described above, and the first fixing member 40 may be a fixing member integrally injection-molded on the core 31. The structure for fixing the core 31 and the connector 10 may be various, and the first fixing member 40 may be an injection-molded member, for example, the first fixing member 40 is the inner connecting sleeve 12 described in the following embodiment, so that no fixing structure is additionally provided, and the core 31 is fixed by using the structure of the connector 10 itself.

In some embodiments, the first securing member 40 is a ductile metallic member. Ductility is a characteristic property of metal and refers to a mechanical property of matter that refers to the ability of a material to plastically deform before it is subjected to a force to break. The property that an object can be stretched into filaments without breaking under the action of external force is called ductility; the property of being able to roll into flakes without breaking under the action of an external force (hammering or rolling) is called spreadability. When the metal is acted by external force, the atomic layers in the metal are easy to relatively displace, and the metal is deformed and is not easy to break, so that the metal has good deformability. Because the first fixing member 40 is disposed on the cable 30, the cable 30 is generally soft and can bend, so that the first fixing member 40 is also subjected to external force; or, when the wire core 31 is pulled, the external force is also transmitted to the first fixing member 40. When the first fixing member 40 is subjected to an external force, the first fixing member 40 is ductile and is not easily broken under the external force; and the first fixing member 40 can absorb a part of external force to deform together with the connector 10 and the cable 30, thereby reducing the risk of cracking and falling off caused by excessive extrusion of the connector 10 and the cable 30 connected with the first fixing member. Furthermore, the first fixing member 40 may transfer a portion of the external force applied to the core 31 to the connector 10, so as to reduce or avoid the transmission of the external force to the second end 3122 of the core 31.

When the cable 30 is stretched by a small extent, the first fixing member 40 resists deformation of the cable 30 by its own ductility, reducing the risk of breakage of the cable 30 at the location of the first fixing member 40 due to pulling. The first fixing member 40 deforms and stretches under the tensile force, so that the fixing of the cable 30 and the fixing of the connector can be always maintained, and a stable state is achieved when the tensile force disappears. Compared with elastic deformation, when the tensile force disappears, the first fixing piece 40 does not retract, but the cable 30 is kept in a stable state, so that the number of times of re-stressing the cable 30 and surrounding parts can be reduced, the risk that the joint of the first fixing piece 40 and the cable 30 and the joint of the first fixing piece 40 and the inner connecting sleeve 12 are cracked and shed is reduced, and the overall connectivity is more stable.

The arrangement of the malleable first fixing member 40 enhances the flexibility of the connector 10 at the position corresponding to the first fixing member 40, has better bending extensibility, and prolongs the service life of the connector 100.

The metal piece may be a pure metal or an alloy, wherein gold, platinum, copper, silver, tungsten, and aluminum are all ductile. For example, in some embodiments, the first securing member 40 is a copper sleeve.

The number of the first fixing members 40 may be one or more, and when a plurality of first fixing members 40 are provided, the plurality of first fixing members 40 are distributed in the length direction of the cable 30 to further enhance the effect of fixing the core 31 and the connector 10.

Referring to fig. 6 in combination, the cable 30 further includes a kevlar layer 33, where the kevlar layer 33 is wrapped around the core 31 and located between the core 31 and the insulating sheath 32, and the kevlar layer 33 has good flexibility, and can form a protective film outside the core 31 to protect the core 31 from damage. The kevlar layer 33 may also be referred to as a buffer layer or coating layer. When the first fixing member 40 is tightly sleeved outside the kevlar layer 33, the kevlar layer 33 and the wire core 31 are tightly adhered, so that the kevlar layer 33 and the wire core 31 do not generate relative movement. Furthermore, by sleeving the first fixing member 40 outside the kevlar layer 33, instead of directly acting on the core 31, the first fixing member 40 can be prevented from scraping the core 31 due to direct contact with the core 31. Of course, in other embodiments, the first securing member 40 may also directly contact the wire core 31 when other factors are considered.

In some embodiments, the kevlar layer 33 includes a first layer of fibers 331 and a second layer of fibers 332 formed in half; the connector 100 includes a plurality of first fixing members 40, at least one first fixing member 40 is tightly sleeved on the first layer of fibers 331 and is located between the first layer of fibers 331 and the second layer of fibers 332; at least one first fastener 40 is tightly nested with the first layer of fibers 331 and the second layer of fibers 332. Taking two first fixing pieces 40 and the left-right direction in fig. 6 as an example, the kevlar layer 33 is firstly wrapped on the wire core 31 to form a first layer of fiber 331, and then the first fixing piece 40 is sleeved outside the first layer of fiber 331; next, the first layer of fibers 331 positioned on the left side of the first fixing member 40 is folded to the right to form a second layer of fibers 332, the second layer of fibers 332 spans the first fixing member 40 to the right, at this time, the first fixing member 40 is covered by the second layer of fibers 332, then the second first fixing member 40 is sleeved on the second layer of fibers 332, the second first fixing member 40 is positioned on the right side of the first fixing member 40, and the second first fixing member 40 clamps the first layer of fibers 331 and the second layer of fibers 332 together.

When the core 31 is subjected to a rightward external force, in order to resist the rightward movement of the core 31, both the first fixing members 40 generate a leftward force on the first layer of fibers 331, so as to eliminate the rightward external force applied to the core 31 and avoid the movement of the core 31. When the external force is larger and the first layer fiber 331 generates a pulling force to the left of the second layer fiber 332, the second fixing member 50 is clamped outside the second layer fiber 332, so that the second layer fiber 332 is further prevented from being pulled to the left, and the kevlar layer 33 and the wire core 31 are further prevented from moving to the right.

In other embodiments, the kevlar layer 33 may be folded in half, or the kevlar layer 33 may be folded in half more times, and at least one first fixing member 40 is disposed in each folding.

Since relative movement between insulating sheath 32 and wire core 31 is induced, such movement tends to loosen where first anchor 40 is located and tends to cause a loss of connection between second end 3122 of cable 30 and conductive structure 20.

In view of this, referring to fig. 7 and 8 in combination, the connector 100 further includes a second fixing member 50, where the second fixing member 50 is fixedly connected to the first end 3121 and the insulating sheath 32, so that the core 31 can be prevented from moving relative to the insulating sheath 32. Specifically, the first fixing member 40 forms a first fixing position, the second fixing member 50 forms a second fixing position, when the wire core 31 is pulled from the second end 3122 to the first end 3121, the wire core 31 will be stressed at the second fixing position, the second fixing member 50 can avoid the wire core 31 moving relative to the insulating sheath 32, so that the second fixing position and the contact position are not affected by the pulling force, and in this embodiment, the first fixing member 40 and the second fixing member 50 form a double protection effect, so that the contact position is protected from being disconnected, and the stability of the electrical contact between the wire core 31 and the conductive structure 20 is further ensured.

When the cable 30 is bent at a position having the insulating sheath 32, a part of the bending force may also constitute a pulling force of the wire core 31 in a direction from the second end 3122 toward the first end 3121.

In some embodiments, second anchor 50 includes a first socket segment 51 having a smaller inner diameter and a second socket segment 52 having a larger inner diameter, first socket segment 51 being closely received over first end 3121 and second socket segment 52 being closely received over insulating sheath 32. In this embodiment, the second fixing member 50 forms a sleeve structure similar to a stepped structure, and adopts a direct sleeving manner, so that the assembly process is simple and quick. In addition, first socket segment 51 grips wire core 31 and second socket segment 52 grips insulating sheath 32, thus equivalently making wire core 31 and insulating sheath 32 relatively fixed. In addition, in other embodiments, the second fixing member 50 may be integrally formed on the cable 30. Alternatively, second fixture 50 may be snapped into place with insulating sheath 32.

In some embodiments, the first fixing member 40 is tightly sleeved outside the first sleeve-connecting section 51, so that the second fixing member 50 can be fixed by the first fixing member 40, thereby ensuring that the second fixing member 50 can be fixed with the wire core 31.

In the technical solution of the present application, the second line segment 312 of the first fixing member 40 fixedly connected to the wire core 31 means that the first fixing member 40 may directly contact with the wire core 31 to be fixedly connected to the wire core 31; alternatively, the first fixing member 40 is fixed with other structures fixed on the wire core 31, thereby achieving fixed connection with the wire core 31; alternatively, the first fixing member 40 contacts with other structures and abuts the other structures against the core 31, thereby achieving mutual fixing of the first fixing member 40, the core 31, and the other structures. Taking the example that the first fixing member 40 is tightly sleeved outside the first sleeving section 51, the first sleeving section 51 is tightly matched with the wire core 31, and meanwhile, the first fixing member 40 can generate a holding force on the first sleeving section 51, which is equivalent to that the first fixing member 40 is fixed relative to the wire core 31.

In some embodiments, the second securing member 50 is a ductile metallic member. Since the second fixing member 50 is disposed on the cable 30, the cable 30 is generally soft and may bend, so that the second fixing member 50 is also subjected to external force; or, when the wire core 31 is pulled, the external force is also transmitted to the second fixing member 50. When the second fixing member 50 is subjected to an external force, the second fixing member 50 is not easily broken due to the ductility of the second fixing member 50; and the second fixing member 50 can absorb a part of external force to deform and stretch along with the connector 10 and the cable 30 so as to resist the deformation of the cable 30, and when the external force disappears, the second fixing member 50 is kept in a stable state, so that the cable 30 is prevented from being stressed again, and the falling risk is reduced. In some embodiments, the second fixture 50 is a copper sleeve.

Referring to fig. 3 in combination, further, the connector 10 further includes a main body 11, and the conductive structure 20 is fixed to the main body 11. The main body 11 provides a carrier for mounting and fixing the conductive structure 20, and the main body 11 may be made of an insulating material, such as a plastic member. The conductive structure 20 refers to a metallic structure, such as a metallic dome or pin needle. The conductive structure 20 and the main body 11 are fixed in various manners, for example, the main body 11 is provided with a slot or a jack, and the conductive structure 20 is in interference fit with the slot or the jack; alternatively, the conductive structure 20 is integrally injection molded with the body portion 11 as an insert.

The outer contour of the cross section of the main body 11 may be generally circular, square or other shape, where the cross section refers to a cross section perpendicular to the length direction of the cable 30.

Referring to fig. 3 and 11-13, the connector 10 further includes an inner connecting sleeve 12, wherein the inner connecting sleeve 12 surrounds the cable 30 and the first fixing member 40, and one end of the inner connecting sleeve 12 is fixed to the main body 11 when the main body 11 is disposed.

Optionally, inner connecting sleeve 12 tightly encloses second wire segment 312 and a portion of insulating sheath 32, such that second wire segment 312 is hidden within inner connecting sleeve 12, and inner connecting sleeve 12 protects second wire segment 312. Alternatively, inner sleeve 12 extends from second wire segment 312 to insulating sheath 32, such that inner sleeve 12 wraps around the transition between second wire segment 312 and insulating sheath 32.

In some embodiments, the first fixing member 40 is fixed to the inner connection sleeve 12, so that when the wire core 31 is stressed, the first fixing member 40 can transfer the external force to the inner connection sleeve 12, thereby preventing the second end 3122 of the wire core 31 from being stressed loose.

Similarly, the second fixing member 50 may be fixed to the inner connecting sleeve 12 by any one of fastening, bonding, and screw connection.

The inner connecting sleeve 12 can be a structure directly sleeved outside the cable 30, or in some embodiments, the inner connecting sleeve 12 is integrally injection molded on the surfaces of the cable 30 and the main body 11, and the inner connecting sleeve 12 wraps the first fixing member 40 and the cable 30, so that no additional fixing structure is needed between the inner connecting sleeve 12 and the first fixing member 40, thereby simplifying the structure and achieving good fixing effect due to the integral injection molding mode.

Specifically, the inner connecting sheath 12 wraps the second wire segment 312 and a portion of the insulating sheath 32, and the first fixing member 40 and the second wire segment 312 are all wrapped and covered by the inner connecting sheath 12, so that the first fixing member 40 and the second wire segment 312 are well fixed to the inner connecting sheath 12, and the second wire segment 312 is prevented from moving.

The inner connecting sleeve 12 is arranged, so that the wire core 31 and the first fixing piece 40 are combined with the inner connecting sleeve 12, on one hand, the fixing of the first fixing piece 40 is realized, and a fixing position is formed; on the other hand, the first fixing member 40 is caused to transfer the external force such as the bending force and the right-side pulling force, which the wire core 31 receives, to the inner joint 12, thereby protecting the welding position or the contact position from being broken; furthermore, the inner connecting sleeve 12 wraps the whole wire core 31 exposed outside the insulating sheath 32, so that a larger area of the wire core 31 is fixed, and the effect that the wire core 31 transfers external force to the inner connecting sleeve 12 is further realized, and the stress of a welding position or a contact position is avoided.

In addition, if the first fixing member 40 is not provided, the second wire segment 312 is directly injection-molded with the inner connecting sleeve 12, and the second wire segment 312 (the wire core 31 is necessarily made of a conductive material) and the inner connecting sleeve 12 (is made of a non-conductive material) have two structures with different hardness, so that when an external force is applied, the position where the hardness is combined is easily cracked. When the first fixing member 40 is disposed, the first fixing member 40 protrudes from the surface of the core 31 and forms a mutually embedded structure with the inner connecting sleeve 12, so that the contact area between the core 31 and the inner connecting sleeve 12 is increased, and the risk of detachment of the core 31 relative to the inner connecting sleeve 12 can be effectively reduced.

When the first fixing member 40 is a ductile metal member, the metal member can absorb a part of the external force to deform, and deform and stretch along with the inner connecting sleeve 12 and the wire core 31, so that the connecting portion of the inner connecting sleeve 12 and the wire core 31 is not cracked due to excessive extrusion of the inner connecting sleeve 12 and the wire core 31 connected with the metal member.

In addition, the inner joint 12 is integrally injection-molded to the surface of the main body 11, and thus can be fixed to the main body 11. To make the coupling effect of the inner coupling sleeve 12 and the main body 11 better, the main body 11 and the inner coupling sleeve 12 may be formed in a mutually engaged structure, for example, in some embodiments, the main body 11 is provided with grooves, and a portion of the inner coupling sleeve 12 is engaged with the grooves.

Further, the inner connecting sleeve 12 also wraps the second fixing member 50, thereby fixing the second fixing member 50 to the connecting head 10, so that the second fixing member 50 transfers the external force to the inner connecting sleeve 12.

In some embodiments, the hardness of the inner connecting sleeve 12 is greater than that of the insulating sheath 32, so that the connection between the inner connecting sleeve 12 and the insulating sheath 32 is a combination of a hard structure and a soft structure, when the softer insulating sheath 32 is subjected to an external force, the end of the inner connecting sleeve 12 far from the main body 11 of the insulating sheath 32 bends relative to the inner connecting sleeve 12, and when the bending times are greater, the combination of the hard structure and the soft structure is easy to crack, and finally other properties such as tightness are affected. Therefore, the second fixing member 50 is formed of a ductile metal, and deformation of the junction between the hard structure and the soft structure can be alleviated by the deformation of the second fixing member 50.

If the second fixing member 50 is not provided, the insulating sheath 32 is directly injection-molded with the inner connecting sleeve 12, the insulating sheath 32 is softer, the inner connecting sleeve 12 is relatively harder, and when receiving bending force, the softer insulating sheath 32 is continuously rubbed and bent at the end part of the harder inner connecting sleeve 12, and the connection part of the softer insulating sheath 32 and the inner connecting sleeve is easily broken. When second fixing member 50 is disposed, second fixing member 50 having ductility can absorb a part of the external force to deform along with insulation sheath 32, so that second fixing member 50 buffers the deformation amount of insulation sheath 32 with respect to inner joint sleeve 12 by being spread; meanwhile, the deformation is ductile, and compared with elastic deformation, after the external force is eliminated, the second fixing piece 50 does not retract, so that the cable 30 is kept in a stable state, the number of times that the cable 30 and surrounding parts are stressed and deformed again is reduced, and the risk of cracking and falling between the insulating sheath 32 and the inner connecting sleeve 12 is reduced.

Further, since second fixture 50 protrudes into the interior of inner connecting sleeve 12, assuming that second fixture 50 is considered as a part of insulating sheath 32 (which may be considered as an integral component because second fixture 50 is already clamped to insulating sheath 32), this corresponds to an increase in the connecting area and connecting depth of insulating sheath 32 and inner connecting sleeve 12, and further ensures the connecting stability between insulating sheath 32 and inner connecting sleeve 12.

Referring to fig. 3, 14 and 15 in combination, further, the connector 10 further includes an outer connecting sleeve 13, the outer connecting sleeve 13 is sleeved outside the inner connecting sleeve 12, the outer connecting sleeve 13 extends to span the inner connecting sleeve 12 in the direction of the second end 3122 pointing to the first end 3121 and tightly wraps the cable 30, and the outer connecting sleeve 13 is a soft rubber member, so that the outer connecting sleeve 13 has better elasticity and forms sealing contact with the cable 30 and the inner connecting sleeve 12, thereby avoiding the contact of the core 31 inside the cable 30 with water vapor, dust and the like. In addition, when applied to a ventricular assist system, the outer connecting sleeve 13 is in direct contact with biological tissue, so that the softer outer connecting sleeve 13 can avoid damage to the biological tissue. Optionally, the outer connecting sleeve 13 is made of liquid silica gel to reduce rejection.

Further, both ends of the outer connecting sleeve 13 may be disposed beyond both ends of the inner connecting sleeve 12, so that the inner connecting sleeve 12 is completely located inside the outer connecting sleeve 13. Optionally, outer connection sleeve 13 also extends across inner connection sleeve 12 at second end 3122 in a direction toward first end 3121 and tightly encloses insulating sheath 32.

In some embodiments, the inner connecting sleeve 12 is a hard plastic piece, and the hardness of the inner connecting sleeve 12 is greater than that of the outer connecting sleeve 13. The use of the harder inner sheath 12 provides a sizing function that prevents the core 31 from bending within the inner sheath 12, thereby maintaining the relative stability of the second end 3122 of the core 31 in contact with the conductive structure 20.

Referring to fig. 11 to 15, further, the inner peripheral wall of the outer connecting sleeve 13 and the outer peripheral wall of the inner connecting sleeve 12 are respectively provided with projections and depressions to form a mutually engaged structure. For example, the inner peripheral wall of the outer connecting sleeve 13 is provided with a plurality of protrusions 131, the outer peripheral wall of the inner connecting sleeve 12 is provided with a plurality of grooves 121, and the protrusions 131 are in one-to-one corresponding insertion with the grooves 121, so that a mutually engaged structure is formed, the inner connecting sleeve 12 and the outer connecting sleeve 13 are connected more stably, and separation of the inner connecting sleeve and the outer connecting sleeve is avoided.

Further, the outer contour of at least a part of the cross section of the inner connecting sleeve 12 is non-circular, and the inner peripheral wall of the outer connecting sleeve 13 is adapted to the inner connecting sleeve 12, so that the positions of the outer connecting sleeve 13 corresponding to the non-circular outer contour of the inner connecting sleeve 12 are also non-circular, thereby achieving the purpose of preventing the inner connecting sleeve 12 and the outer connecting sleeve 13 from rotating relatively. Alternatively, the outer contour of the cross-section of a portion of the inner connecting sleeve 12 approximates a racetrack shape, i.e. the inner contour of the cross-section of a portion of the outer connecting sleeve 13 approximates a racetrack shape with two opposing arcuate segments 122 and two opposing linear segments 123. The cross section in this embodiment refers to a cross section perpendicular to the axial direction of the inner joint sleeve 12, and the axial direction of the inner joint sleeve 12 refers to the direction in which the cable 30 is threaded inside the inner joint sleeve 12.

In addition, the outer connecting sleeve 13 can be integrally injection molded on the inner connecting sleeve 12, so that the two connecting sleeves are more tightly matched, and the outer connecting sleeve 13 can be sleeved outside the inner connecting sleeve 12 after being molded.

Because the inner connecting sleeve 12 and the outer connecting sleeve 13 have different hardness, when the outer connecting sleeve 13 is bent, one end of the harder inner connecting sleeve 12 far away from the main body 11 abuts against the softer outer connecting sleeve 13, so that the risk of cracking of the outer connecting sleeve 13 at a position corresponding to one end of the inner connecting sleeve 12 far away from the main body 11 is easy to occur, and further, blood or other substances enter the connector 10 from the cracked position.

Referring to fig. 3, 9 and 10 in combination, further, the connector 100 further includes a third fixing member 60 disposed between the inner connecting sleeve 12 and the outer connecting sleeve 13, the third fixing member 60 is a ductile metal member, the third fixing member 60 includes a first sleeve body 61 and a second sleeve body 62 connected to each other, the first sleeve body 61 is tightly sleeved on the outer peripheral surface of the inner connecting sleeve 12, and the second sleeve body 62 is connected to an end of the first sleeve body 61 remote from the conductive structure 20 and is tightly sleeved on the cable 30 such as the insulating sheath 32.

The third fixing member 60 has better ductility, and can absorb a part of external force by using the ductility of itself, so as to avoid concentration of stress at one end of the inner connecting sleeve 12 far from the main body 11, thereby reducing the risk of cracking of the outer connecting sleeve 13. Further, the third fixing member 60 is fixed to both the inner joint sleeve 12 and the cable 30, which corresponds to fixing the inner joint sleeve 12 and the cable 30, so that the connection stability between the inner joint sleeve 12 and the cable 30 can be ensured.

When the elastic member 70 is provided (described in the following embodiments), the third fixing member 60 is tightly sleeved on the elastic member 70, and the elastic member 70 is fixed to the cable 30, so that the third fixing member 60 is tightly sleeved on the cable 30, but the sleeve is not in direct contact but in indirect contact. Of course, the inner peripheral wall of the third fixing member 60, i.e., the inner peripheral wall of the first segment 621 and the elastic member 70 may also be in contact with or have a small gap therebetween, without generating an abutment force, so as to facilitate deformation of the elastic member 70.

Further, the second sleeve 62 includes a first segment 621 and a second segment 622, one end of the first segment 621 is connected to the first sleeve 61, the other end of the first segment 621 is connected to the second segment 622, a gap is formed between the first segment 621 and the cable 30, and the second segment 622 is tightly sleeved on the cable 30. The connector 100 further includes an elastic member 70 fitted over the cable 30, a portion of the elastic member 70 being closely fitted over the inner connecting sleeve 12, and another portion of the elastic member 70 being located in the gap. In this embodiment, the elastic member 70 and the third fixing member 60 have larger elasticity, and the overlapping position of the elastic member 70 and the third fixing member 60 corresponds to the position of the first segment 621, which is the position with the highest elasticity in the whole connector 10, when the cable 30 is bent, the positions of the elastic member 70 and the third fixing member 60 are most easily deformed, so the elastic member 70 and the third fixing member 60 can unload the stress in advance through deformation, thereby changing the stress point, and the stress point at the original positions of the first fixing member 40 and the second fixing member 50 is moved to the right side of the elastic member 70 and the third fixing member 60, so that the stress of the first fixing member 40 and the second fixing member 50 is avoided, and the first fixing member 40 and the second fixing member 50 are prevented from being disconnected from the cable 30 due to the bending of the cable 30, and the connection stability of the first fixing member 40 and the second fixing member 50 and the cable 30 is ensured.

The inner diameter of the second section 622 is smaller than the inner diameter of the first section 621, so that a step surface 623 is formed between the first section 621 and the second section 622, and the other portion of the elastic member 70 is exposed outside the inner joint sleeve 12 in a direction away from the second end 3122 and can abut against the step surface 623, thereby limiting the elastic deformation length of the elastic member 70 by the step surface 623. And, the provision of second section 622, avoiding resilient member 70, directly contacts insulating sheath 32, allowing insulating sheath 32 to be more stably secured relative to inner joint member 12.

Further, the connector 10 further includes an inner connecting sleeve 12, and the inner connecting sleeve 12 tightly surrounds the cable 30. The connector 100 further comprises an elastic member 70 sleeved outside the cable 30, wherein a part of the elastic member 70 is tightly sleeved by the inner connecting sleeve 12, and is fixed by the inner connecting sleeve 12, and the other part of the elastic member 70 is exposed outside the inner connecting sleeve 12 in a direction away from the second end 3122; the first fixing member 40 is located between the elastic member 70 and the second end 3122. In this embodiment, the elastic member 70 has a larger elasticity, belongs to a position with a larger elasticity of the whole connector 10, and when the cable 30 is bent, the portion of the elastic member 70 located outside the inner connecting sleeve 12 is most likely to deform, so the elastic member 70 can unload the stress in advance through deformation, thereby changing the stress point, and moving the stress point at the original first fixing member 40 to the right of the elastic member 70, so as to avoid the stress of the first fixing member 40, thereby avoiding the disconnection of the first fixing member 40 and the cable 30 due to the bending of the cable 30, and ensuring the connection stability of the first fixing member 40 and the cable 30.

When the second fixing member 50 is disposed, the second fixing member 50 is also located between the elastic member 70 and the second end 3122, so that, similarly, the elastic member 70 can unload stress in advance through deformation, so that the stress point is changed, the stress point at the original second fixing member 50 is moved to the right side of the elastic member 70, and the stress of the second fixing member 50 is avoided, so that the second fixing member 50 is prevented from being disconnected from the cable 30 due to bending of the cable 30, and the connection stability of the second fixing member 50 and the cable 30 is ensured.

The elastic member 70 is a spring, which has good elasticity and can release stress in advance. It will be appreciated that the elastic member 70 may also be an elastic sleeve or a soft rubber sleeve.

Because the first and second fasteners 40, 50 are positioned within the relatively rigid inner joint sleeve 12, the inner joint sleeve 12 is generally more stable in shape and less flexible, and the cable 30 is substantially unaffected by bending forces within the inner joint sleeve 12, and more is subject to pulling forces from the second end 3122 toward the first end 3121. Thus, the first and second fixing members 40 and 50 are provided as ductile metallic members to conform to the ductile deformation of the cable 30 when pulled and to maintain the stability of the form.

The softer cable 30 easily bends at the end of the rigid inner joint sleeve 12 (referred to as the end remote from the second end 3122) at the point of origin at which the cable 30 breaks during the continuing bending. By adding the third fixing member 60, the stability of the cable 30 in the vicinity of the base point can be maintained by the ductility of the third fixing member 60, and the magnitude and the number of times the cable 30 is bent can be reduced, thereby reducing the risk of breakage of the cable 30 at the base point.

Furthermore, the arrangement of the elastic member 70 is equivalent to making the cable 30 have better elasticity near the base point, and the elastic member 70 can support the cable 30, so that the cable 30 and the end of the hard inner connecting sleeve 12 can be prevented from wearing away from each other and the amplitude of relative bending can be reduced.

Further, the embodiment of the application also provides a ventricular assist system. Specifically, the ventricular assist system includes a blood pump, a controller, and the connector 100 of any of the foregoing embodiments. The blood pump and the controller are connected to the connector 100, respectively. The structure of the connector 100 is shown in the above embodiments, and will not be described herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A connector, comprising:

a connector;

the conductive structure is fixed with the connector;

2. The connector of claim 1, wherein the first fixing member is ring-shaped and is tightly sleeved on the wire core.

3. The connector of claim 2, wherein the first securing member is a non-closed loop structure.

4. The connector of claim 2, wherein the cable further comprises a kevlar layer, the kevlar layer being wrapped around the core, the kevlar layer comprising a first layer of fibers and a second layer of fibers folded in half, the first layer of fibers being located between the second layer of fibers and the core;

5. The connector of claim 1, wherein the first securing member is a ductile metallic member.

6. The connector of claim 5, wherein the first securing member is a copper sleeve.

7. The connector according to any one of claims 1 to 6, wherein the connecting head includes a main body portion and an inner connecting sleeve provided around the cable and the first fixing member, the first fixing member being fixed with the inner connecting sleeve; the main body part is fixed with one end of the inner connecting sleeve, and the conductive structure is arranged on the main body part.

8. The connector of claim 7, wherein the inner connecting sleeve is integrally injection molded to the cable and the main body, the inner connecting sleeve surrounding the first securing member and the cable; and/or the number of the groups of groups,

9. The connector of claim 8, wherein the inner peripheral wall of the outer sleeve and the outer peripheral wall of the inner sleeve are each provided with a concavity and convexity to form a mutually engaging structure.

10. The connector of claim 1, wherein the cable further comprises an insulating sheath, the wire core comprising a first wire segment and a second wire segment, the first wire segment being surrounded by the insulating sheath, the second wire segment being located outside the insulating sheath, the second wire segment having the first end and the second end, the first end being connected to the first wire segment;

11. The connector of claim 10, wherein the second securing member comprises a first socket section having a smaller inner diameter and a second socket section having a larger inner diameter, the first socket section being closely sleeved outside the first end, the second socket section being closely sleeved on the insulating sheath.

12. The connector of claim 11, wherein the header further comprises a body portion and an inner connecting sleeve, the conductive structure being secured to the body portion;

13. The connector of claim 11, wherein the first securing member fits snugly around the first socket section.

14. The connector of claim 1, wherein the header further comprises an inner connecting sleeve and an outer connecting sleeve, the inner connecting sleeve tightly surrounding the cable, the inner connecting sleeve being a hard plastic;

15. The connector of claim 14, wherein the second sleeve comprises a first section and a second section, one end of the first section is connected to the first sleeve, the other end of the first section is connected to the second section, a gap is provided between the first section and the cable, and the second section is tightly sleeved on the cable;

16. The connector of claim 1, wherein the header further comprises an inner connecting sleeve that tightly encloses the cable;

the connector further comprises an elastic piece sleeved outside the cable, one part of the elastic piece is tightly sleeved by the inner connecting sleeve, the other part of the elastic piece is exposed out of the inner connecting sleeve in a direction away from the second end, and the first fixing piece is located between the elastic piece and the second end.

17. The connector of claim 16, wherein the elastic member is a spring, an elastic sleeve, or a soft rubber sleeve.

18. A ventricular assist system, comprising: a blood pump, a controller and a connector as claimed in any one of claims 1 to 17, one end of the connector being connected to the blood pump by a cable and the other end of the connector being connected to the controller by another cable.