Connector and ventricular assist device

Abstract

The utility model relates to a connector and a ventricular assist device.The connector comprises a first connecting base, a second connecting base and a locking sleeve, the first connecting base is provided with a first connecting part and a slot formed in the first connecting part, the second connecting base comprises a main body and a flexible sleeve wrapping the main body, the flexible sleeve is provided with an inserting part, and the inserting part is inserted into the first connecting part. A first step part is formed on the outer wall of the flexible sleeve, the inserting part is used for being matched with the inserting groove, the locking sleeve is arranged on the flexible sleeve in a sleeving mode and is provided with a first extruding part and a second connecting part, the second connecting part is matched with the first connecting part, and the first extruding part can extrude the inserting part into the inserting groove through the first step part. According to the connector, the second connecting part of the locking sleeve is matched with the first connecting part of the first connecting seat, so that the first extruding part abuts against the first step part and applies force towards the first connecting seat towards the flexible sleeve, the inserting part is extruded towards the interior of the inserting groove, the inserting part is in better contact with the wall of the inserting groove, and the sealing effect of the connector is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a connector and a ventricular assist device. Background Art

[0002] Cardiovascular disease has become a major cause of death in humans, and heart transplantation is an effective means of treating patients with severe heart disease. However, in reality, there are far more heart recipients than heart donors, resulting in the death of patients while waiting for heart transplantation.

[0003] A ventricular assist device is a commonly used device for assisting the treatment of cardiovascular disease. The ventricular assist device includes a blood pump and a controller. When in use, the blood pump is located inside the body, and the controller is located outside the body. The connector connects the blood pump cable and the controller cable together, enabling the controller to control the blood pump, so that the blood pump assists the heart in pumping blood.

[0004] However, the sealing performance of traditional connectors is poor, and external moisture or dust can easily enter, causing adverse effects on the connection performance of the connector. In severe cases, it may even cause the controller and the blood pump to be unable to communicate. Summary of the invention

[0005] Based on this, it is necessary to provide a connector and a ventricular assist device to improve the sealing effect of the connector.

[0006] In one aspect, the present application provides a connector, comprising:

[0007] A first connection seat, comprising a first connection portion and a slot formed in the first connection portion, wherein the first connection seat is provided with a first electrical connection member;

[0008] A second connection seat, comprising a main body and a flexible sleeve covering the main body, the flexible sleeve is formed with a plug-in portion, an outer wall of the flexible sleeve is formed with a first step portion, the second connection seat is provided with a second electrical connector, the plug-in portion cooperates with the slot, and enables the first electrical connector to be electrically connected to the second electrical connector; and

[0009] The locking sleeve is sleeved outside the flexible sleeve and has a first extrusion portion and a second connection portion. The second connection portion cooperates with the first connection portion so that the first extrusion portion can press against the first step portion and apply a force toward the first connection seat to the flexible sleeve.

[0010] In one embodiment, the outer wall of the flexible sleeve is formed with a second step portion spaced apart from the first step portion, the second step portion is located on a side of the first step portion away from the plug-in portion, and the locking sleeve has a second extrusion portion for extruding the second step portion.

[0011] In one embodiment, in the direction in which the plug-in portion and the slot are plugged into each other, the distance between the first step portion and the second step portion is L1, the distance between the first extrusion portion and the second extrusion portion is L2, and L2≥L1.

[0012] In one of the embodiments, a convex ring is formed on the outer wall of the plug-in portion, and when the second connecting portion is matched with the first connecting portion, the convex ring is in sealing contact with the side wall of the insertion slot.

[0013] In one embodiment, the first connecting portion has a first end surface facing the second connecting seat, the slot is opened on the first end surface, and the first step portion is sealed and clamped between the first end surface and the first extrusion portion.

[0014] In one of the embodiments, the first extrusion portion is provided with a chamfer, and the position of the first step portion abutting against the chamfer is adapted to the shape of the chamfer.

[0015] In one embodiment, the first connection portion is threadedly matched with the second connection portion, and the radial dimension of the second connection portion gradually decreases in the direction from the first connection seat to the second connection seat, so that the second connection portion is arranged in a trumpet shape.

[0016] In one embodiment, the plug-in portion has a second end face, the second end face is opposite to the bottom wall of the slot, the distance between the second step portion and the second end face is L3, and the flexible sleeve includes a main body portion formed between the first step portion and the second step portion, the outer diameter of the main body portion is D, 0.8≤L3 / D≤1.2.

[0017] In one of the embodiments, the plug-in portion has a second end surface, the second end surface is opposite to the bottom wall of the slot, and one of the second end surface and the bottom wall of the slot is provided with an annular protrusion.

[0018] On the other hand, the present application also provides a ventricular assist device, comprising:

[0019] Blood pump;

[0020] a controller; and,

[0021] A connector as described above;

[0022] The first electrical connector is electrically connected to one of the blood pump and the controller, and the second electrical connector is electrically connected to the other of the blood pump and the controller.

[0023] In the connector and ventricular assist device of the present application, the plug-in portion cooperates with the slot so that the second connection seat cooperates with the first connection seat to realize the electrical connection between the first electrical connector and the second electrical connector; after the locking sleeve cooperates with the first connection portion through the second connection portion, the locking sleeve establishes a connection with the first connection seat; at the same time, the first extrusion portion of the locking sleeve applies a thrust toward the first connection seat to the first step portion, thereby, the technical solution has at least one of the following effects:

[0024] 1. The first extrusion part applies pressure to the first step part, and the first step part can be deformed by the force, and transmit the thrust received to the flexible sleeve where it is located, so that the thrust of the locking sleeve can be effectively transmitted to the flexible sleeve, thereby achieving better push locking and resistance sealing;

[0025] 2. The first step portion can better contact with the first connecting seat under the extrusion deformation of the first extrusion portion, thereby improving the sealing performance between the flexible sleeve and the first connecting seat;

[0026] 3. The flexible sleeve is pushed toward the first connection seat, so that the structure of the plug-in portion can extend into the slot as much as possible after deformation, so as to better contact with the wall of the slot of the first connection seat, thereby achieving a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] FIG. 1 is a schematic diagram of a three-dimensional structure of a connector according to an embodiment.

[0029] FIG. 2 is a schematic structural diagram of the connector shown in FIG. 1 from another perspective.

[0030] FIG. 3 is a schematic cross-sectional structure diagram of a connector according to an embodiment.

[0031] Figure 4 FIG. 3 is a schematic diagram of a partial structure of the connector shown in FIG. 3 .

[0032] FIG. 5 is a schematic diagram of the three-dimensional structure of the main body of the second connecting socket in a connector according to an embodiment.

[0033] FIG. 6 is a schematic cross-sectional view of the flexible sleeve of the second connecting socket in a connector according to an embodiment.

[0034] FIG. 7 is a schematic cross-sectional view of a locking sleeve in a connector according to an embodiment.

[0035] FIG. 8 is a front view schematically showing a first connection socket of a connector according to an embodiment.

[0036] FIG. 9 is a schematic cross-sectional structural diagram of the first connecting socket shown in FIG. 8 along section line II.

[0037] Description of reference numerals:

[0038] 100, connector; 10, first connecting seat; 10a, first electrical connector; 10b, first seat body; 11, first connecting portion; 11a, first end face; 12, slot; 12a, bottom wall; 12b, side wall; 12c, annular protrusion; 13, sealing groove; 20, second connecting seat; 20a, second electrical connector; 20b, second seat body; 21, main body; 211, protrusion; 22, flexible sleeve; 22a, main body; 221, plug-in portion; 221a, second end face; 221b, annular groove; 221c, convex ring; 221d, groove; 222, first step portion; 223, second step portion; 224, extension portion; 30, locking sleeve; 31, first extrusion portion; 31a, chamfer; 32, second connecting portion; 33, second extrusion portion; 40, sealing ring. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0045] As shown in Figures 1 and 2, an embodiment of the present application provides a connector 100 that can be used to achieve an electrical connection between two objects. Taking the application of the connector 100 in a ventricular assist device as an example, the ventricular assist device includes a controller and a blood pump. The connector 100 is used to connect the controller and the blood pump, so that the controller and the blood pump can be electrically connected through the connector 100, thereby meeting the controller's control needs for the blood pump. It is understandable that the connector 100 can also be used for electrical connection between two electronic modules in other devices.

[0046] Combined with Figure 3 and Figure 4 As shown, the connector 100 in the embodiment of the present application includes a first connection seat 10, a second connection seat 20 and a locking sleeve 30. Among them, the first connection seat 10 and the second connection seat 20 are two structural members for the connector 100 to achieve docking, and an electrical connection structure for realizing the conductive function of the connector 100 is arranged between the two. For ease of understanding, the electrical connector arranged in the first connection seat 10 is referred to as the first electrical connector 10a, and correspondingly, the electrical connector arranged in the second connection seat 20 is referred to as the second electrical connector 20a. For the application of the connector 100 to a ventricular assist device, the connector 100 plays the role of electrically connecting the blood pump with the controller. Specifically, the first electrical connector 10a of the first connection seat 10 can be connected to the blood pump through a cable, and the second electrical connector 20a of the second connection seat 20 can be connected to the controller through another cable. In this way, when the first connection seat 10 is matched with the second connection seat 20, so that the first electrical connector 10a is electrically connected to the second electrical connector 20a, the electrical connector 100 can play the role of electrically connecting the blood pump and the controller.

[0047] It is understandable that in other embodiments, the first electrical connector 10a of the first connector 10 can also be used to connect the controller, and in this case, the second electrical connector 100 of the second connector 20 is used to connect the blood pump. The first connector and the cable can be electrically connected to each other by welding. The first connector and the cable can be electrically connected to each other by welding. The second connector and another cable can be electrically connected to each other by welding.

[0048] Continue to combine Figure 3 and Figure 4 As shown, the first connection seat 10 has a first connection portion 11 and a slot 12 formed in the first connection portion 11. The second connection seat 20 includes a main body 21 and a flexible sleeve 22 covering the main body 21, the flexible sleeve 22 is formed with a plug-in portion 221, and the outer wall of the flexible sleeve 22 is formed with a first step portion 222. The second connection seat 20 is provided with a second electrical connector 20a, and the plug-in portion 221 is used to cooperate with the slot 12, and the first electrical connector 10a is electrically connected to the second electrical connector 20a.

[0049] The locking sleeve 30 is sleeved outside the flexible sleeve 22. The locking sleeve 30 has a first extrusion portion 31 and a second connection portion 32. The second connection portion 32 cooperates with the first connection portion 11, so that the first extrusion portion 31 can press the first step portion 222 and apply a force toward the first connection seat 10 to the flexible sleeve 22. In this embodiment, the second connection portion 32 of the locking sleeve 30 cooperates with the first connection portion 11 of the first connection seat 10, not only to achieve the connection between the first connection seat 10 and the second connection seat 20; moreover, because when the first connection portion 11 cooperates with the second connection portion 32, the first extrusion portion 31 presses the first step portion 222 and applies a force toward the first connection seat 10 to the flexible sleeve 22, so that the plug-in portion 221 can extend into the slot 12 as much as possible, and better transmit the thrust of the locking sleeve 30 to the flexible sleeve 22.

[0050] In this way, the plug-in portion 221 can better contact the wall of the slot 12, and then the plug-in portion 221 of the flexible sleeve 22 can be easily deformed in the slot 12, so as to achieve a good sealing effect, so as to prevent liquids, solid particles and other substances from entering the electrical connection structure from the connection position between the first connection seat 10 and the second connection seat 20 to cause a short circuit. It should be noted here that when the first extrusion portion 31 presses the first step portion 222, the first step portion 222 will also be deformed due to the pressure of the first extrusion portion 31. In this way, the first step portion 222 can better contact the first connection seat 10, thereby also improving the sealing performance between the flexible sleeve 22 and the first connection seat 10. One of the first electrical connector 10a and the second electrical connector 20a can be a pin needle, and the other can be a metal cylinder matched with the pin needle. In this way, when the first connection seat 10 and the second connection seat 20 are matched, the pin needle and the metal cylinder are plugged in to achieve electrical connection between the two.

[0051] The number of the first electrical connectors 10a and the second electrical connectors 20a is the same and corresponds one to one, so as to realize the corresponding electrical signal transmission. The number of the first electrical connectors 10a and the second electrical connectors 20a is not limited here. For example, in some embodiments, five first electrical connectors 10a are arranged on the first connection seat 10, and five second electrical connectors 20a are arranged on the second connection seat 20. When the first connection seat 10 and the second connection seat 20 are matched, that is, the plug-in portion 221 is matched with the slot 12, these first electrical connectors 10a and the second electrical connectors 20a are in contact one to one correspondence, so as to realize electrical connection.

[0052] Continue to combine Figure 3 and Figure 4As shown, the first electrical connector 10a can be connected to the first base body 10b, and the connection between the first base body 10b and the first connection base 10 is realized. It can be understood that the first base body 10b can be connected to the first connection base 10 by snapping, or can be integrally formed with the first connection base 10 by injection molding. The connection method between the first base body 10b and the first connection base 10 is not limited here.

[0053] Based on the fact that the second connection seat 20 includes a main body 21 and a flexible sleeve 22 wrapped around the main body 21, the main body 21 can be connected to the second electrical connector 20a by injection molding. The main body 21 can also be set as an injection molding structure to pass through and fix a cable for connecting to the second electrical connector 20a. In some embodiments, in combination with FIG. 3, the second electrical connector 20a can also be set on the second seat body 20b, and the second seat body 20b is connected to the main body 21 of the second connection seat 20, so that the second electrical connector 20a is stably connected to the second connection seat 20. The second seat body 20b can be integrally molded with the main body 21 of the second connection seat 20 by injection molding, or it can be connected by a snap-on method, which is not limited here.

[0054] As shown in FIG. 5 and FIG. 6 , the outer surface of the main body 21 has a plurality of protrusions 211, and the inner surface of the flexible sleeve 22 has a groove 221d matching the protrusion 211. With this structural arrangement, when the flexible sleeve 22 is wrapped around the main body 21, the connection stability between the flexible sleeve 22 and the main body 21 is good. Moreover, when the first extrusion portion 31 presses the first step portion 222, the protrusion 211 and the groove 221d are more stably matched. The shape of the protrusion 211 includes but is not limited to an arc shape or a ring shape.

[0055] The cross-section of the first connection seat 10 and the second connection seat 20 may be substantially circular. Of course, in some embodiments, the first connection seat 10 and the second connection seat 20 may also be prismatic or conical. The shapes of the first connection seat 10 and the second connection seat 20 are not limited here.

[0056] In some embodiments, in combination with FIG. 3 and Figure 4 As shown, the first connection portion 11 has a first end surface 11a facing the second connection seat 20, and the slot 12 is opened on the first end surface 11a. The first step portion 222 is sealed and clamped between the first end surface 11a and the first extrusion portion 31, so that the first step portion 222 is used to further improve the sealing between the first connection seat 10 and the second connection seat 20.

[0057] The plug-in portion 221 has a second end surface 221a, and the second end surface 221a is opposite to the bottom wall 12a of the slot 12. The bottom wall 12a of the slot 12 is provided with an annular protrusion 12c, so that the annular protrusion 12c and the second end surface 221a are abutted to improve the fit between the plug-in portion 221 and the bottom wall 12a of the slot 12, thereby improving the sealing between the plug-in portion 221 and the bottom wall 12a of the slot 12. In some embodiments, the annular protrusion 12c can also be formed on the second end surface 221a.

[0058] In the embodiment where one of the second end surface 221a and the bottom wall 12a of the slot 12 is provided with an annular protrusion 12c, the other of the second end surface 221a and the bottom wall 12a of the slot 12 is provided with an annular groove 221b. The annular protrusion 12c cooperates with the annular groove 221b, so that the sealing between the two is improved by the cooperation of the annular protrusion 12c and the annular groove 221b. At the same time, the cooperation of the annular protrusion 12c and the annular groove 221b also plays a positioning effect, so that the plug-in portion 221 is not easy to loosen in the slot 12, which is conducive to maintaining the sealing contact between the plug-in portion 221 and the bottom wall 12a of the slot 12.

[0059] A convex ring 221c is formed on the outer wall of the plug-in portion 221. When the second connection portion 32 is matched with the first connection portion 11, the convex ring 221c is in sealing contact with the side wall 12b of the slot 12, thereby achieving a seal between the peripheral side of the plug-in portion 221 and the side wall 12b of the slot 12, thereby improving the overall sealing between the first connection seat 10 and the second connection seat 20.

[0060] It is understandable that the diameter of the convex ring 221c is larger than the diameter of the plug-in portion 221, so that the plug-in portion 221 can be smoothly inserted into the slot 12, and at the same time, the convex ring 221c with a larger diameter can easily and tightly abut against the side wall 12b of the slot 12 when the plug-in portion 221 is squeezed by the first squeezing portion 31, thereby enhancing the sealing between the two. Figure 4 As shown, when the second connection portion 32 of the locking sleeve 30 cooperates with the first connection portion 11 of the first connection seat 10, the locking sleeve 30 will generate a radial extrusion force on the first connection portion 11, so that the first connection portion 11 is gathered toward the middle of the plug-in portion 221, further increasing the extrusion force of the side wall 12b of the plug-in portion 221 and the side wall 12b of the slot 12 on the convex ring 221c, thereby improving the sealing between the plug-in portion 221 and the side wall 12b of the slot 12.

[0061] 6 and 7 , the outer wall of the flexible sleeve 22 is formed with a second step portion 223, which is located on a side of the first step portion 222 away from the plug portion 221. The locking sleeve 30 has a second extrusion portion 33 for extruding the second step portion 223.

[0062] When the locking sleeve 30 applies pressure to the left flexible sleeve 22, the second pressing portion 33 pushes against the second step portion 223 to apply the pushing force to the flexible sleeve 22, and at the same time, the locking sleeve 30 also uses the first pressing portion 31 to push against the first step portion 222. Since the first step portion 222 is located between the second step portion and the first connecting seat, the middle portion of the flexible sleeve 22 is also effectively pushed, thereby preventing the middle area of ​​the flexible sleeve 22 from being unable to be effectively pushed due to deformation of the flexible sleeve 22, thereby preventing the sealing performance of the flexible sleeve 22, the first connecting seat 10 and the locking sleeve 30 from being weakened.

[0063] In the direction in which the plug-in portion 221 and the slot 12 are plugged into each other, the distance between the first step portion 222 and the second step portion 223 is L1, and the distance between the first extrusion portion 31 and the second extrusion portion 33 is L2, where L2≥L1. With this structural arrangement, when the locking sleeve 30 is used to fasten the first connection seat 10 and the second connection seat 20, the amount of extrusion of the first extrusion portion 31 on the first step portion 222 is greater than or equal to the amount of extrusion of the second extrusion portion 33 on the second step portion 223. Therefore, when the second extrusion portion 33 extrudes the second step portion 223, the first extrusion portion 31 will also inevitably extrude the first step portion 222, thereby ensuring that the force of the locking sleeve 30 on the flexible sleeve 22 in the direction of the slot 12 can effectively deform different regions of the flexible sleeve 22, thereby achieving a better sealing effect. Specifically, since the first extrusion portion 31 can extrude the first step portion 222 and the second extrusion portion 33 can extrude the second step portion 223 at the same time, the two extrusion portions can be used to extrude the corresponding step portions respectively, thereby increasing the deformation of the flexible sleeve 22, and then the flexible sleeve 22 is more easily pressed against the first connecting seat 10 to improve the sealing effect between the lifting.

[0064] There is no limitation on the shape of the first step portion 222, as long as it can abut against the first extrusion portion 31 to push the flexible sleeve 22. For example, the first step portion 222 can be a plurality of convex portions arranged at intervals around the circumference of the flexible sleeve 22, or a convex ring, so as to effectively conduct the thrust applied by the first extrusion portion 31. The second step portion 223 receives the pressure applied by the second extrusion portion 33, and it can also be a plurality of convex portions arranged at intervals around the circumference of the flexible sleeve 22, or a convex ring arranged around the circumference of the flexible sleeve 22; however, the second step portion 223 can preferably be a convex ring arranged around the circumference of the flexible sleeve 22, so as to be able to deform while conducting the thrust applied by the locking sleeve 30 to achieve the sealing fit between the second step portion 223 and the locking sleeve 30.

[0065] In some embodiments, as shown in FIG. 6 , the distance between the second step portion 223 and the second end face 221a is L3. For ease of explanation, the portion of the flexible sleeve 22 corresponding to the first step portion 222 and the second step portion 223 is referred to as the "main body 22a", that is, the flexible sleeve 22 includes a main body 22a formed between the first step portion 222 and the second step portion 223. It can be understood that based on the overall shape of the flexible sleeve 22, the main body 22a is also in the shape of a sleeve. In this embodiment, the outer diameter of the main body 22a is D, 0.8≤L3 / D≤1.2. Through this structural setting, the second step portion 223 has a sufficiently long dimension to the second end face 221a, so that it is easy to be squeezed and deformed. In this way, the first step portion 222 and the second step portion 223 can be squeezed better by the first extrusion portion 31 and the second extrusion portion 33, respectively, to increase the deformation of the flexible sleeve 22, so as to better achieve the tight sealing effect between the flexible sleeve 22 and the first connecting seat 10. It should be noted that, for a flexible sleeve 22 with a circular outer contour, the diameter of the flexible sleeve 22 is the diameter of the circle at the corresponding position of the outer contour. For a flexible sleeve 22 with a non-circular outer contour, the diameter of the flexible sleeve 22 refers to the diameter of the circumscribed circle of its circumferential contour.

[0066] It should be noted that the distance L1 between the first step portion 222 and the second step portion 223 is also the length of the main body portion 22 a.

[0067] Continuing with FIG. 7 , in the embodiment where the distance between the first step portion 222 and the second step portion 223 is L1, the distance between the second step portion 223 and the second end face 221a is L3, 0.4≤L1 / L3≤0.6. With this arrangement, the first step portion 222 and the second step portion 223 are appropriately spaced apart from each other, and the distance from the second end face 221a is more suitable for extrusion deformation at the corresponding position, so that when the flexible sleeve 22 is extruded at the first step portion 222 and the second step portion 223, the deformation strength of each region is equivalent, so as to better seal with the first connection seat 10 and the locking sleeve 30.

[0068] In some embodiments, the value range of L1 is 4mm-5mm, and the value range of L3 is 8mm-10mm. It should be noted that the flexible sleeve 22 is not limited to including the plug-in portion 221, the first step portion 222 and the second step portion 223. In some embodiments, an extension portion 224 is also connected to the end of the second step portion 223 away from the first step portion 222. It can be understood that the end of the main body 22a away from the plug-in portion 221 is connected to the extension portion 224. The extension portion 224, as an extension of the main body 22a, can be easily connected to the cable and provide good support for the cable. In some embodiments, the total length of the flexible sleeve 22 can be 18mm-22mm, and the length of the flexible sleeve 22 is not limited here.

[0069] Continuing with FIG. 6 and FIG. 7 , the first extrusion portion 31 is provided with a chamfer 31a, and the position P of the first step portion 222 for abutting against the chamfer 31a is adapted to the shape of the chamfer 31a to prevent the edge of the first extrusion portion 31 from cutting the flexible sleeve 22 due to its sharpness. It should be noted that the chamfer 31a of the first extrusion portion 31 can be a rounded corner, so that the surface of the first extrusion portion 31 is rounded, so that when the first step portion 222 is extruded, it is not easy to damage the flexible sleeve 22. In some embodiments, the chamfer 31a of the first extrusion portion 31 can also be a 45-degree angle, which is not limited here.

[0070] It should be noted that the first connection part 11 and the second connection part 32 can be a snap connection or other connection methods, as long as the first connection part 11 and the second connection part 32 cooperate to achieve the sealing and extrusion of the flexible sleeve 22 to the first connection seat 10, thereby achieving the sealing of the first connection seat 10 and the second connection seat 20.

[0071] For example, combining Figure 3 and Figure 4 As shown, the first connection part 11 is threadedly matched with the second connection part 32. Specifically, the first connection part 11 has an external thread, and the second connection part 32 has an internal thread, and the internal thread and the external thread are matched, so that the first connection part 11 is connected to the second connection part 32, that is, the connection between the locking sleeve 30 and the first connection seat 10 is realized. With the locking of the locking sleeve 30, the first connection seat 10 and the second connection seat 20 are stably connected. Since the locking sleeve 30 can squeeze the flexible sleeve 22 of the second connection seat 20, the flexible sleeve 22 is sealed against the first connection seat 10, and the flexible sleeve 22 is sealed against the locking sleeve 30, so that the connector 100 as a whole has good sealing performance.

[0072] Furthermore, in the direction from the first connection seat 10 to the second connection seat 20, the radial dimension of the second connection portion 32 is gradually reduced, so that the second connection portion 32 is arranged in a trumpet shape. When the first connection portion 11 is threadedly matched with the second connection portion 32, the locking sleeve 30 moves in the direction from the first connection seat 10 to the second connection seat 20. Since the radial dimension of the second connection portion 32 is gradually reduced in this direction, the locking sleeve 30 will produce radial extrusion on the first connection portion 11, so that the first connection portion 11 produces an extrusion effect on the flexible sleeve 22, increasing the deformation of the flexible sleeve 22, and then strengthening the sealing effect of the flexible sleeve 22 between the first connection portion 11 and the flexible sleeve 22. It can be understood that the tighter the locking sleeve 30 is locked, the greater the extrusion force on the flexible sleeve 22, and the greater the deformation, so as to achieve a better seal.

[0073] The flexible sleeve 22 may be made of medical silicone to obtain good deformation capability. The first connection seat 10 may be made of metal to provide sufficient structural strength for the connector 100. Accordingly, the locking sleeve 30 may be made of plastic or metal, which is not limited here.

[0074] Combined with Figure 3 and Figure 4 As shown, the connector 100 includes a sealing ring 40, which is used to seal the first connection seat 10 and the locking sleeve 30. In this way, not only the first connection seat 10 and the second connection seat 20 have good sealing, but also the first connection seat 10 and the locking sleeve 30 have good sealing, thereby improving the overall sealing performance of the connector 100. The sealing ring 40 can be arranged on the outer wall of the first connection seat 10, or on the inner wall of the locking sleeve 30. For example, in some embodiments, as shown in Figures 8 and 9, the outer wall of the first connection seat 10 is provided with a sealing groove 13, and the sealing groove 13 is used to assemble the sealing ring 40. As shown in Figure 3, when the locking sleeve 30 is connected to the first connection seat 10, the sealing ring 40 is sandwiched between the locking sleeve 30 and the first connection seat 10, so as to achieve sealing between the first connection seat 10 and the locking sleeve 30.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A connector, It is characterized in that include: A first connection seat, comprising a first connection portion and a slot formed in the first connection portion, wherein the first connection seat is provided with a first electrical connection member; A second connection seat, comprising a main body and a flexible sleeve covering the main body, the flexible sleeve is formed with a plug-in portion, an outer wall of the flexible sleeve is formed with a first step portion, the second connection seat is provided with a second electrical connector, the plug-in portion cooperates with the slot, and enables the first electrical connector to be electrically connected to the second electrical connector; and The locking sleeve is sleeved outside the flexible sleeve and has a first extrusion portion and a second connection portion. The second connection portion cooperates with the first connection portion so that the first extrusion portion can press against the first step portion and apply a force toward the first connection seat to the flexible sleeve.

2. The connector according to claim 1, It is characterized in that The outer wall of the flexible sleeve is formed with a second step portion spaced apart from the first step portion, the second step portion is located at a side of the first step portion away from the plug-in portion, and the locking sleeve has a second extrusion portion for extruding the second step portion.

3. The connector according to claim 2, It is characterized in that In the direction in which the plug-in portion and the slot are plugged into each other, the distance between the first step portion and the second step portion is L1, the distance between the first extrusion portion and the second extrusion portion is L2, and L2≥L1.

4. The connector according to claim 1, It is characterized in that A convex ring is formed on the outer wall of the plug-in portion. When the second connection portion is matched with the first connection portion, the convex ring is in sealing contact with the side wall of the insertion slot.

5. The connector according to claim 1, It is characterized in that The first connecting portion has a first end surface facing the second connecting seat, the slot is opened on the first end surface, and the first step portion is sealed and clamped between the first end surface and the first extrusion portion.

6. The connector according to claim 1, It is characterized in that The first extrusion portion is provided with a chamfer, and the position of the first step portion abutting against the chamfer is adapted to the shape of the chamfer.

7. The connector according to claim 1, It is characterized in that The first connection portion is threadedly matched with the second connection portion, and in the direction from the first connection seat to the second connection seat, the radial dimension of the second connection portion gradually decreases, so that the second connection portion is arranged in a trumpet shape.

8. The connector according to claim 2, It is characterized in that The plug-in portion has a second end face, which is opposite to the bottom wall of the slot, and the distance from the second step portion to the second end face is L3. The flexible sleeve includes a main body portion formed between the first step portion and the second step portion, and the outer diameter of the main body portion is D, 0.8≤L3 / D≤1.

2.

9. The connector according to any one of claims 1 to 7, It is characterized in that The plug-in portion has a second end surface, the second end surface is opposite to the bottom wall of the slot, and one of the second end surface and the bottom wall of the slot is provided with an annular protrusion.

10. A ventricular assist device, It is characterized in that include: Blood pump; Controller; as well as, The connector according to any one of claims 1 to 9; The first electrical connector is electrically connected to one of the blood pump and the controller, and the second electrical connector is electrically connected to the other of the blood pump and the controller.

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