Butt joint plug and blood pumping catheter

Abstract

The utility model relates to a butt joint plug and a blood pumping catheter, the butt joint plug comprises a shell, an electronic element and a joint connector, the shell is used for installing a cable of the blood pumping catheter, the electronic element is located in the shell, and the joint connector comprises a connector body, a first pin, a second pin and a third pin. The first pin is used for being electrically connected to a signal transmission port of control equipment, the second pin and the third pin are both located in the shell, the second pin is electrically connected to the electronic element, and the third pin is used for being electrically connected to a signal line in a cable of the blood pumping catheter. According to the embodiment of the invention, the length of the signal line between the electronic component and the control equipment is reduced, the signal line is not easily interfered by other cables or external environment, the signal transmission is not easily distorted, and the working reliability of the electronic component is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a docking plug and a blood pumping catheter. Background Art

[0002] As a minimally invasive medical device, a blood pumping catheter can replace the function of a failing heart and provide circulatory support for patients with critical cardiovascular diseases such as complex coronary heart disease, acute myocardial infarction combined with cardiogenic shock, and acute decompensation of chronic heart failure. The blood pumping catheter at least includes electronic components, which are connected to a control device through some signal lines in a cable to achieve data interaction with the control device. Specifically, the electronic component can be a storage element or other chip.

[0003] At present, electronic components are generally installed in a protective shell close to the patient end, that is, far away from the control device. Since the signal line between the electronic components and the control device is too long, it is susceptible to electromagnetic interference from other cables or the external environment, resulting in distortion of the transmitted signal, affecting the normal use of the electronic components. Utility Model Content

[0004] The embodiment of the present application provides a docking plug and a blood pumping catheter, which can significantly shorten the distance between the electronic component and the control device, are not easily affected by electromagnetic interference from other cables or the external environment, and signal transmission is not easily distorted, thereby improving the working reliability of the electronic component.

[0005] In the first aspect, an embodiment of the present application provides a docking plug, comprising: a shell; an electronic component located inside the shell; a joint connector, comprising a connector body installed on the shell, and a first pin, a second pin, and a third pin all fixedly connected to the connector body, one or more second pins are electrically connected to a portion of the first pins in a one-to-one correspondence, one or more third pins are electrically connected to another portion of the first pins in a one-to-one correspondence, the first pin is used to electrically connect to a signal transmission port of a control device, the second pin and the third pin are both located inside the shell, the second pin is electrically connected to the electronic component, and the third pin is used to electrically connect to a signal line in the cable of a blood pumping catheter.

[0006] In some embodiments, the docking plug further includes a first circuit board, the first circuit board is located in the housing, and the electronic component is electrically connected to the second pin through the first circuit board.

[0007] In some embodiments, the second pin and the third pin are located on the same side of the connector body, the first circuit board is fixed to a side of the connector body close to the second pin, and the first circuit board is provided with an avoidance hole to avoid the third pin.

[0008] In some embodiments, the shell includes a shell body and a cover body that are openably and closably connected, the third pin is located in the shell body, and when the cover body is in a closed state, the cover body and the shell body define a accommodating cavity, and the electronic component is located in the accommodating cavity.

[0009] In some embodiments, there are spaced-apart snap-fit ​​structures and bendable connecting parts between the edge of the cover and the shell body, the connecting parts are used to enable the cover to rotate relative to the shell body, and the cover, shell body and connecting parts are integrally formed by injection molding.

[0010] In some embodiments, the angle between the direction in which the cable extends out of the housing and the direction in which the docking plug is inserted into the control device is n, satisfying 90°≤n≤180°.

[0011] In some embodiments, the third pin is extended toward the end of the cable in the housing.

[0012] In a second aspect, an embodiment of the present application provides a blood pumping catheter, comprising a cable and the above-mentioned docking plug, wherein the cable extends into the housing, and a signal line in the cable is electrically connected to a third pin.

[0013] In some embodiments, the blood pumping catheter also includes a pipeline lead-out assembly installed on the cable, a sheath and a motor connected in sequence from the distal end of the cable, an infusion pipeline and a drainage pipeline passing through the cable and the sheath, the proximal end of the infusion pipeline extends from a port of the pipeline lead-out assembly and is connected to the liquid supply port of the control device, the proximal end of the drainage pipeline extends from another port of the pipeline lead-out assembly and is connected to the return port of the control device, the distal end of the infusion pipeline is connected to the inlet of the heat dissipation cavity of the motor, and the distal end of the drainage pipeline is connected to the outlet of the heat dissipation cavity of the motor.

[0014] In some embodiments, the blood pumping catheter also includes a protective shell, a sheath and a motor connected in sequence from the distal end of the cable, a first signal driving line passes through the sheath, the distal end of the first signal driving line is welded to the motor, the signal line passing through the cable includes a second signal driving line, the wire diameter of the first signal driving line is smaller than the wire diameter of the second signal driving line, and the proximal end of the first signal driving line is connected to the distal end of the second signal driving line in the protective shell.

[0015] An embodiment of the present application provides a docking plug and a blood pumping catheter, wherein the docking plug includes a shell, an electronic component and a joint connector, the shell is used to install the cable of the blood pumping catheter, the electronic component is located in the shell, the joint connector includes a connector body, a first pin, a second pin and a third pin, the first pin is used to electrically connect to a signal transmission port of a control device, the second pin and the third pin are both located in the shell, the second pin is electrically connected to the electronic component, and the third pin is used to electrically connect to the signal line in the cable of the blood pumping catheter. Since the electronic component is located inside the docking plug and the first pin of the docking plug can be directly electrically connected to the signal transmission port of the control device, the distance between the electronic component and the control device is significantly shortened compared to the prior art. Therefore, the length of the signal line between the electronic component and the control device is reduced, the signal transmission delay is low, and it is not easily affected by electromagnetic interference from other cables or the external environment. The signal transmission is not easily distorted, which improves the working reliability of the electronic component. In addition, the signal line in the cable is electrically connected to the third pin, which means that the signal transmitted by the signal line in the cable can be directly transmitted to the control device through the third pin and the corresponding first pin, rather than being indirectly transmitted to the control device through the electronic component, which can relatively reduce the interference of the signal transmitted by the signal line to the control device on the normal operation of the electronic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic diagram of the internal structure of a docking plug provided in some embodiments of the present application;

[0018] Figure 2 A schematic diagram of the internal structure of a docking plug provided in some other embodiments of the present application;

[0019] Figure 3 A schematic diagram of the internal structure of a docking plug provided for some embodiments of the present application having a cover;

[0020] Figure 4 This is a structural schematic diagram of some embodiments of the cover body of the present application in which the cover body is in an open state;

[0021] Figure 5 Schematic diagram of the internal structure of a docking plug provided in some other embodiments of the present application having a cover body;

[0022] Figure 6 A schematic diagram of the internal structure of a docking plug provided in some other embodiments of the present application;

[0023] Figure 7 A schematic diagram of the structure of a blood pumping catheter provided in some embodiments of the present application;

[0024] Figure 8 A schematic diagram of the internal structure of a protective shell provided in some embodiments of the present application;

[0025] Fig. 9 A schematic diagram of the structure inside the protective shell provided in some other embodiments of the present application.

[0026] In the figure: 1. shell; 101. cover; 1011. card slot; 102. shell body; 1021. card block; 2. cable; 201. second signal drive line; 3. joint connector; 301. connector body; 302. second pin; 303. first pin; 304. optical fiber ferrule; 305. third pin; 4. electronic component; 5. wire; 6. first circuit board; 7. second circuit board; 8. connecting part; 9. accommodating cavity; 10. pipeline lead-out assembly; 11. protective shell; 12. antibacterial sheath; 13. positioning device; 14. sheath; 1401. first signal drive line; 15. motor; 16. blood passage; 17. control device; 18. perfusion pipeline; 19. drainage pipeline. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0029] In addition, it should be noted that, in the description of the embodiments of the present application, unless otherwise clearly defined, "in vivo" means inside the tissues and organs of the patient, and "in vitro" means outside the tissues and organs of the patient. At the same time, in the embodiments of the present application, "distal" refers to the direction away from the physician, that is, the direction close to the patient; "proximal" refers to the direction close to the physician, that is, the direction away from the patient.

[0030] In some technical solutions, the blood pump catheter includes at least electronic components, which are connected to the control device through some signal lines in the cable to achieve data interaction with the control device. At present, the installation position of the electronic components is generally in a protective shell close to the patient end, that is, far away from the control device.

[0031] Research has found that because the signal line between electronic components and control devices is too long, it is susceptible to electromagnetic interference from other cables or the external environment, causing distortion of the transmitted signal and affecting the normal use of the electronic components.

[0032] In order to solve the problems of the prior art, the embodiment of the present application provides a docking plug and a blood pumping catheter. It can be understood that the blood pumping catheter in the present application can be any kind of blood pumping catheter including a docking plug, and one of the blood pumping catheters will be taken as an example and described in detail in conjunction with the accompanying drawings.

[0033] Figure 7 A schematic diagram of the structure of a blood pumping catheter provided in some embodiments of the present application.

[0034] See also Figure 7 , the blood pump catheter generally includes a docking plug, a cable 2, a protective shell 11 connected to the distal end of the shell 1 through the cable 2, a sheath 14, a bacteria-blocking sheath 12, a positioning device 13, a motor 15, and a blood passage 16 connected to the distal end of the motor 15. Among them, the blood passage 16 is used to intervene in the corresponding ventricle or artery; the motor 15 is located at the proximal end of the blood passage 16, and the impeller of the motor 15 can accelerate the flow of blood in the pumping direction to increase the blood flow; the positioning device 13 and the bacteria-blocking sheath 12 are used to fix and adjust the sheath 14 during the surgical operation, so that the blood passage 16 and the motor 15 intervene in the predetermined position of the corresponding ventricle or artery, and at the same time, provide a barrier outside the body to reduce the risk of external bacteria and microorganisms entering the blood circulation; the protective shell 11 is used to connect the cable 2 and the sheath 14.

[0035] Figure 1 A schematic diagram of the internal structure of a docking plug provided in some embodiments of the present application.

[0036] like Figure 1 and Figure 7As shown, an embodiment of the present application provides a docking plug, which is used to achieve electrical and signal communication between the cable 2 and the control device 17. The docking plug includes a housing 1, an electronic component 4 and a joint connector 3. The electronic component 4 is located in the housing 1, and the housing 1 is used to install the cable 2 of the blood pump catheter. Specifically, one end of the cable 2 and part of the joint connector 3 are respectively inserted into the housing 1, and the signal line in the cable 2 and the electronic component 4 are respectively in signal communication with part of the joint connector 3 located in the housing 1, and the rest of the joint connector 3 is exposed outside the housing 1 for signal communication with the control device 17. Among them, the signal communication mode can be electrical signal communication or optical signal communication, etc.

[0037] In some embodiments, the joint connector 3 includes a connector body 301 mounted on the housing 1, and a first pin 303, a second pin 302, and a third pin 305 all fixedly connected to the connector body 301, more than one second pin 302 is electrically connected to a part of the first pin 303 in a one-to-one correspondence, more than one third pin 305 is electrically connected to another part of the first pin 303 in a one-to-one correspondence, the first pin 303 is used to be electrically connected to the signal transmission port of the control device 17, the second pin 302 and the third pin 305 are both located in the housing 1, the second pin 302 is electrically connected to the electronic component 4, and the third pin 305 is used to be electrically connected to the signal line in the cable 2 of the blood pump catheter. It can be understood that a part of the connector body 301 is located in the housing 1, for fixing the second pin 302 and the third pin 305; another part of the connector body 301 is located outside the housing 1, for fixing the first pin 303; the first pin 303 can be electrically connected to the signal transmission port of the control device 17 by plugging.

[0038] Since the electronic component 4 is located inside the docking plug, and the first pin 303 of the docking plug can be directly electrically connected to the signal transmission port of the control device 17, compared with the prior art, the distance between the electronic component 4 and the control device 17 is significantly shortened. Therefore, the length of the signal line between the electronic component 4 and the control device 17 is reduced, the signal transmission delay is low, and it is not easily affected by electromagnetic interference from other cables 2 or the external environment. The signal transmission is not easily distorted, which improves the working reliability of the electronic component 4. In addition, the signal line in the cable 2 is electrically connected to the third pin 305, which means that the signal transmitted by the signal line in the cable 2 can be directly transmitted to the control device 17 through the third pin 305 and the corresponding first pin 303, rather than indirectly transmitted to the control device 17 through the electronic component 4, which can relatively reduce the interference of the signal transmitted by the signal line to the control device 17 on the normal operation of the electronic component 4.

[0039] It should be noted that the cable 2 contains at least a signal line for transmitting electrical signals. The signal line can be used as a driving line to provide power to the motor 15, sensors and other devices of the blood pumping catheter; the signal line can also transmit data signals collected by the sensors in the blood pumping catheter to the control device 17 in the form of electrical signals. In some embodiments, the cable 2 also contains an optical fiber for transmitting optical signals, and the connector body 301 is fixed with an optical fiber ferrule 304 spaced apart from the first pin 303. The optical fiber extending from the cable 2 to the housing 1 is installed on the end of the optical fiber ferrule 304 extending into the housing 1, and the end of the optical fiber ferrule 304 extending outside the housing 1 is used to be plugged into the signal transmission port of the control device 17 to transmit data to the control device 17. Specifically, the optical fiber can transmit data signals collected by the optical fiber pressure sensor, optical fiber temperature sensor, etc. in the blood pumping catheter to the control device 17 in the form of optical signals.

[0040] like Figure 1 As shown, in some embodiments, the electronic component 4 and the second pin 302 can be connected through the corresponding wire 5. The structure is simple, the wire 5 occupies a small space, and the specific position of the electronic component 4 in the shell 1 can be arranged more flexibly, which is convenient for improving the space utilization in the shell 1.

[0041] Figure 2 Schematic diagram of the internal structure of the docking plug provided in some other embodiments of the present application.

[0042] like Figure 2As shown, in some embodiments, the docking plug also includes a first circuit board 6 located in the housing 1, and the electronic component 4 is electrically connected to the second pin 302 through the first circuit board 6. It can be understood that the electronic component 4 and the second pin 302 are respectively welded to the first circuit board 6 and are electrically connected through the conductive layer in the first circuit board 6. In the scheme of connecting the electronic component 4 and the second pin 302 through the wire 5, since the end of the wire 5 is easy to shake, it is not easy to fix the welding position of the wire 5 during the process of welding the wire 5 to the electronic component 4 or welding the wire 5 to the second pin 302, and it is easy to have a cold solder joint. In the technical solution, a first circuit board 6 is provided, and the first circuit board 6 is easier to position than the wire 5. Therefore, it is easy to achieve a higher connection strength between the first circuit board 6 and the second pin 302, and between the first circuit board 6 and the electronic component 4 through welding, and it is not easy to have a cold solder joint, which has the advantage of stable connection. In other embodiments, the signal line extending from the cable 2 into the shell 1 and the third pin 305 are also respectively welded to the first circuit board 6 and electrically connected through the corresponding conductive layer of the first circuit board 6. It is easy to achieve a high connection strength between the first circuit board 6 and the third pin 305, and between the first circuit board 6 and the corresponding signal line through welding. It is not easy to have cold solder joints, and has the advantage of stable connection. It can be understood that in the first circuit board 6, the conductive layer welded to the second pin 302 and the conductive layer welded to the third pin 305 are arranged at intervals.

[0043] In some embodiments, the second pin 302 and the third pin 305 are located on the same side of the connector body 301, the first circuit board 6 is fixedly connected to the side of the connector body 301 close to the second pin 302, and the first circuit board 6 is provided with an avoidance hole to avoid the third pin 305, so that the signal line can be smoothly soldered to the third pin 305, and the mutual interference between the conductive layer of the first circuit board 6 and the signal line can be reduced. Specifically, the first circuit board 6 can be fixedly connected to the connector body 301 by bonding, screw connection, etc. The second pin 302 and the third pin 305 are located on the same side of the connector body 301, which can minimize the interval between the second pin 302 and the third pin 305 and improve the integration; the avoidance hole is set on the first circuit board 6 to avoid the third pin, indicating that the size of the first circuit board 6 is relatively large, which is convenient for the staff to clamp the first circuit board 6 during the assembly process. Since the electronic component 4 is soldered to the first circuit board 6, the position of the electronic component 4 in the housing 1 can be kept relatively fixed by fixing the first circuit board 6, so as to prevent the electronic component 4 from shaking randomly in the housing 1 and causing damage to the electronic component 4; in addition, when the first circuit board 6 is fixed to the connector body 301 by bonding or other means, the risk of desoldering between the first circuit board 6 and the second pin 302 can be reduced. In other embodiments, the avoidance hole may not be provided, and the first circuit board 6 may avoid the third pin 305 by reducing the size of the first circuit board 6 or providing a larger interval between the third pin 305 and the second pin 302.

[0044] Figure 3 A schematic diagram of the internal structure of a docking plug provided in some embodiments of the present application having a cover body 101; Figure 4 Schematic diagram of the structure of some embodiments of the cover body 101 of the present application, in which the cover body 101 is in an open state; Figure 5 Schematic diagram of the internal structure of a docking plug provided in some other embodiments of the present application having a cover body 101.

[0045] like Figures 3 to 5As shown, in some embodiments, the housing 1 includes a housing body 102 and a cover body 101 that can be opened and closed, the third pin 305 is located in the housing body 102, and when the cover body 101 is in a closed state, the cover body 101 and the housing body 102 define a receiving cavity 9, and the ends of the electronic component 4 and the second pin 302 are both located in the receiving cavity 9. It can be understood that the portion of the cable 2 extending into the housing 1, the portion of the connector body 301 extending into the housing 1, and the third pin 305 are all located inside the housing body 102, and the positions where the cable 2, the connector body 301, and the cover body 101 are installed to the housing body 102 are spaced apart. When the electronic component 4 has a process error such as a cold solder joint or the electronic component 4 itself is damaged, the cover body 101 can be opened to replace the electronic component 4, which is convenient to operate and has a lower cost than directly replacing the docking plug or directly replacing the blood pump catheter; in addition, since the third pin 305 and the portion of the cable 2 extending into the housing 1 are isolated from the electronic component 4, the signal interference between the two is relatively reduced. It should be noted that the end of the second pin 302 refers to an end of the second pin 302 away from the connector body 301 .

[0046] like Figures 3 to 5 As shown, in some embodiments, there are spaced-apart snap-fit ​​structures and bendable connecting parts 8 between the edge of the cover 101 and the shell body 102. The connecting parts 8 are used to enable the cover 101 to rotate relative to the shell body 102. The cover 101, the shell body 102 and the connecting parts 8 are integrally formed by injection molding, so that the docking plug has a high production efficiency. When the cover 101 is in a closed state, the snap-fit ​​structure is in a snap-fit ​​state, so that the cover 101 can be in a relatively stable closed state; it can be understood that the snap-fit ​​structure and the connecting part 8 are arranged at the opposite edges of the cover 101, respectively, and the snap-fit ​​force of the snap-fit ​​structure has a relatively large force arm relative to the connecting part 8, which can further improve the stability of the cover 101 when it is in a closed state. Specifically, in this embodiment, the snap-fit ​​structure includes a snap-fitting slot 1011 disposed on the cover 101 and a snap-fitting block 1021 disposed on the shell body 102. When the cover 101 is in a closed state, the snap-fitting block 1021 is snap-fitted into the snap-fitting slot 1011. In other embodiments, the snap-fitting slot 1011 may be disposed on the shell body 102, and the snap-fitting block 1021 may be disposed on the cover 101. In addition, the shell body 102 may be filled with injection liquid, so as to fix the components such as the cable 2, the joint connector 3 and / or the electronic component 4 inside the shell body 102.

[0047] In some embodiments, the edge of the cover 101 and the shell body 102 may also be rotatably connected via a rotating shaft or the like.

[0048] like Figures 1 to 5As shown, in some embodiments, the angle between the direction in which the cable 2 extends out of the housing 1 and the direction in which the docking plug is inserted into the control device 17 is n, satisfying 90°≤n≤180°. Specifically, in this embodiment, by limiting the angle range of n, it is possible to avoid interference between the structure at the position where the cable 2 extends out of the housing 1 and the control device 17 during the process of the docking plug being plugged into the signal transmission port of the control device 17.

[0049] Figure 6 Schematic diagram of the internal structure of the docking plug provided in some other embodiments of the present application.

[0050] like Figure 6 As shown, in some embodiments, the third pin 305 is extended toward the end of the cable 2 in the housing 1. Specifically, in this embodiment, the connector body 301 is columnar, and the first pin 303 and the second pin 302 are respectively located at two ends along the axis of the connector body 301; the direction in which the cable 2 extends into the housing 1 is perpendicular to the axis of the connector body 301, and the third pin 305 is located on the peripheral side of the connector body 301 near the cable 2 in the housing 1. The length of the signal line extending from the cable 2 into the housing 1 can be relatively reduced, and the signal line extending from the cable 2 into the housing 1 can be welded to the third pin 305 without bending, which can reduce the risk of the signal line breaking due to bending.

[0051] like Figure 7 As shown, the embodiment of the present application also provides a blood pumping catheter, including a cable 2 and a docking plug in the above embodiment. Since the blood pumping catheter includes the docking plug in the above embodiment, it has at least all the beneficial effects brought by the above embodiment, which will not be repeated here. It can be understood that other forms of blood pumping catheters with the above docking plug are also within the protection scope of the present application.

[0052] like Figure 7As shown, in some embodiments, the blood pumping catheter also includes a pipeline lead-out assembly 10 installed on the cable 2, a sheath 14 and a motor 15 connected in sequence from the distal end of the cable 2, an infusion pipeline 18 and a drainage pipeline 19 pass through the cable 2 and the sheath 14, the proximal end of the infusion pipeline 18 extends from a port of the pipeline lead-out assembly 10 and is connected to the liquid supply port of the control device 17, the proximal end of the drainage pipeline 19 extends from another port of the pipeline lead-out assembly 10 and is connected to the return port of the control device 17, the distal end of the infusion pipeline 18 is connected to the inlet of the heat dissipation cavity of the motor 15, and the distal end of the drainage pipeline 19 is connected to the outlet of the heat dissipation cavity of the motor 15. The prior art does not have a drainage pipeline 19. After the perfusion fluid flows through the heat dissipation cavity through the perfusion pipeline 18, it will further flow into the patient's body, which is likely to cause discomfort to the patient. In addition, since the total amount of perfusion fluid that the patient can absorb is limited, it is necessary to control the flow rate of the perfusion fluid within a predetermined range to control the total amount of perfusion fluid entering the patient's body during the operation to meet the requirements, resulting in unsatisfactory heat dissipation effect of the motor 15. After the present application sets the drainage pipeline 19, the perfusion fluid flowing through the heat dissipation cavity can flow to the reflux port of the control device 17 through the drainage pipeline 19, which can prevent the perfusion fluid from flowing into the patient's body and reduce the risk of discomfort to the patient. In addition, the heat dissipation effect of the motor 15 can be improved by increasing the flow rate of the perfusion fluid.

[0053] Figure 8 Schematic diagram of the internal structure of the protective shell 11 provided in some embodiments of the present application.

[0054] like Figure 8As shown, in some embodiments, the blood pump catheter further includes a protective shell 11, a sheath 14 and a motor 15 connected in sequence from the distal end of the cable 2, a first signal driving line 1401 runs through the sheath 14, the distal end of the first signal driving line 1401 is welded to the motor 15, the signal line running through the cable 2 includes a second signal driving line 201, the wire diameter of the first signal driving line 1401 is smaller than the wire diameter of the second signal driving line 201, and the proximal end of the first signal driving line 1401 and the distal end of the second signal driving line 201 are connected in the protective shell 11. Specifically, the proximal end of the first signal driving line 1401 and the distal end of the second signal driving line 201 can be electrically connected by direct welding, wire 5 connector connection, etc. Since the sheath 14 needs to be inserted into the patient's body, the diameter of the sheath 14 is smaller than that of the cable 2. The diameter of the first signal driving line 1401 accommodated in the sheath 14 should not be too large. Installing the second signal driving line 201 with a relatively large diameter in the cable 2 can reduce the risk of the second signal driving line 201 breaking during the bending process of the cable 2. In addition, the distal end of the first signal driving line 1401 can be welded to the motor 15 in advance at the motor 15 manufacturer. In the final assembly of the blood pumping catheter, it is only necessary to connect the first signal driving line 1401 and the second signal driving line 201 in the protective shell 11, which can reduce the operational difficulty and defective rate of the blood pumping catheter and improve the assembly efficiency.

[0055] Fig. 9 Schematic diagram of the structure inside the protective shell 11 provided in some other embodiments of the present application.

[0056] like Fig. 9 As shown, a second circuit board 7 is installed in the protective shell 11, and the first signal driving line 1401 and the second signal driving line 201 are respectively welded to the second circuit board 7, and the first signal driving line 1401 and the corresponding second signal driving line 201 are electrically connected through the corresponding conductive layer in the second circuit board 7. In the scheme of directly welding the first signal driving line 1401 and the second signal driving line 201, since the proximal end of the first signal driving line 1401 to be welded and the distal end of the second signal driving line 201 are prone to shaking, the welding is difficult and cold welding is prone to occur. In the technical solution, a second circuit board 7 is provided, and the second circuit board 7 is easy to position, so the welding difficulty can be relatively reduced and the risk of cold welding can be reduced.

[0057] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A butt plug for a blood pump catheter, characterized in that: include: case; An electronic component is located in the housing; A joint connector comprises a connector body mounted on the housing, and a first pin, a second pin and a third pin all fixedly connected to the connector body, wherein at least one of the second pins is electrically connected to a part of the first pins in a one-to-one correspondence, and at least one of the third pins is electrically connected to another part of the first pins in a one-to-one correspondence. The first pin is used to electrically connect to the signal transmission port of the control device, the second pin and the third pin are both located in the shell, the second pin is electrically connected to the electronic component, and the third pin is used to electrically connect to the signal line in the cable of the blood pumping catheter.

2. The docking plug according to claim 1, characterized in that: It also includes a first circuit board, which is located in the housing, and the electronic component is electrically connected to the second pin through the first circuit board.

3. The docking plug according to claim 2, characterized in that: The second pin and the third pin are located on the same side of the connector body, the first circuit board is fixedly connected to a side of the connector body close to the second pin, and the first circuit board is provided with an avoidance hole to avoid the third pin.

4. The docking plug according to claim 1, characterized in that: The shell comprises a shell body and a cover body which are openably and closably connected, the third pin is located in the shell body, and when the cover body is in a closed state, the cover body and the shell body define a containing cavity, and the electronic component is located in the containing cavity.

5. The docking plug according to claim 4, characterized in that: There are spaced-apart snap-fit ​​structures and bendable connecting parts between the edge of the cover and the shell body, and the connecting parts are used to enable the cover to rotate relative to the shell body. The cover, the shell body and the connecting parts are integrally formed by an injection molding process.

6. The docking plug according to claim 1, characterized in that: An angle n is formed between a direction in which the cable extends out of the housing and a direction in which the docking plug is inserted into the control device, satisfying 90°≤n≤180°.

7. The docking plug according to claim 1, characterized in that: The third pin is extended toward the end of the cable in the housing.

8. A blood pumping catheter, characterized in that: The invention comprises a cable and the docking plug according to any one of claims 1 to 7, wherein the cable extends into the housing, and a signal line in the cable is electrically connected to the third pin.

9. The blood pumping catheter according to claim 8, characterized in that: The blood pumping catheter also includes a pipeline lead-out assembly installed on the cable, a sheath and a motor connected in sequence from the distal end of the cable, an infusion pipeline and a drainage pipeline passing through the cable and the sheath, the proximal end of the infusion pipeline extends from a port of the pipeline lead-out assembly and is connected to the liquid supply port of the control device, the proximal end of the drainage pipeline extends from another port of the pipeline lead-out assembly and is connected to the reflux port of the control device, the distal end of the infusion pipeline is connected to the inlet of the heat dissipation chamber of the motor, and the distal end of the drainage pipeline is connected to the outlet of the heat dissipation chamber of the motor.

10. The blood pumping catheter according to claim 8, characterized in that: The blood pumping catheter also includes a protective shell, a sheath and a motor connected in sequence from the distal end of the cable, a first signal driving line passes through the sheath, the distal end of the first signal driving line is welded to the motor, the signal line passing through the cable includes a second signal driving line, the wire diameter of the first signal driving line is smaller than the wire diameter of the second signal driving line, and the proximal end of the first signal driving line and the distal end of the second signal driving line are connected in the protective shell.

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