Medical pump and in-vitro auxiliary circulation system

Abstract

The invention relates to a medical pump and an in-vitro auxiliary circulation system. The medical pump comprises a pump machine, wherein the top of the pump machine is provided with an upper cover assembly; the bottom of the pump head is provided with a connecting part, and the connecting part is connected with the upper cover assembly in a matched mode so that the pump head can be detachably fixed to the top of the pump machine; the matching part is arranged on the upper cover assembly; and the locking piece is arranged on the connecting part, and the locking piece is matched with the matching piece in a locking mode so that the pump head can be locked to the pump machine. Therefore, the locking piece and the matching piece are directly arranged on the original parts of the pump head and the pump machine, new parts do not need to be added, the cost is reduced, meanwhile, the arrangement form of the locking piece and the matching piece can be simplified, the complexity of the locking structure is reduced, cleaning is convenient, the pump head and the pump machine are convenient to assemble and disassemble, and it is guaranteed that the pump head is reliably locked to the pump machine.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a medical pump and an extracorporeal circulatory system. Background Art

[0002] Extracorporeal assisted circulation systems, such as extracorporeal membrane oxygenation systems, are extracorporeal circulation technologies that have been developed outside the cardiac operating room. The principle is to draw venous blood out of the body, oxygenate it through an artificial heart-lung bypass made of special materials, and then inject it into the patient's arterial or venous system. This system plays the role of extracorporeal respiratory support or cardiac support, maintaining oxygenation and blood supply to human organs and tissues. The extracorporeal assisted circulation system usually includes an intravascular cannula, a connecting tube, a drive pump, an oxygenator (membrane lung) and a host. Among them, the drive pump is generally composed of a pump head and a drive pump / power pump for driving the pump head.

[0003] At present, the locking mechanism of the pump head and the pump machine is generally set on the pump machine, and there is only one protruding or recessed locking feature on the pump head to cooperate with the locking tongue of the locking mechanism to achieve reliable installation of the pump head on the pump machine. However, the locking mechanism on the pump machine is generally large in size, poor in cleanliness, affecting the performance, and high in cost. Summary of the invention

[0004] Based on this, it is necessary to provide a medical pump and an extracorporeal assisted circulation system to address the problems of large size and poor cleanliness of the locking device on the current pump machine. The system can reliably lock the pump head to the pump machine while simplifying the locking structure of the pump head and the pump machine, reducing complexity and facilitating disassembly of the pump head and the pump machine. At the same time, there is no need to design a locking mechanism on the top of the pump machine, which reduces costs and facilitates cleaning.

[0005] A medical pump, comprising:

[0006] A pump machine, wherein the top of the pump machine is provided with an upper cover assembly;

[0007] A pump head, wherein the bottom of the pump head has a connecting portion, and the connecting portion is cooperatively connected with the upper cover assembly so as to detachably fix the pump head to the top of the pump machine;

[0008] A matching piece, disposed on the upper cover assembly; and

[0009] A locking member is arranged on the connecting portion, and the locking member is locked and matched with the matching member to lock the pump head to the pump machine.

[0010] In one embodiment of the present application, the locking member is a first threaded portion, the matching member is a second threaded portion, the first threaded portion is disposed on the connecting portion, and the second threaded portion is disposed on the upper cover assembly;

[0011] The first threaded portion is screwed together with the second threaded portion, so that the pump head can rotate along the central axis of the pump and spirally descend or spirally ascend relative to the pump to lock or unlock the pump head and the pump.

[0012] In one embodiment of the present application, the lead of the first threaded portion and the second threaded portion is adapted to the screw connection length between the pump head and the pump machine;

[0013] Alternatively, the pitches of the first threaded portion and the second threaded portion are adapted to the screwed connection length between the pump head and the pump machine.

[0014] In one embodiment of the present application, the connecting portion has a mounting hole, the locking member is arranged on the inner wall of the mounting hole, the upper cover assembly has a mounting column, and the matching member is arranged on the outer wall of the mounting column.

[0015] In one embodiment of the present application, the upper cover assembly further has a mounting groove, the mounting post is disposed in the mounting groove, and when the mating piece is connected to the locking piece, the connecting portion gradually enters the mounting groove.

[0016] In one embodiment of the present application, the mounting holes and the mounting columns are respectively arranged symmetrically around the central axis of the medical pump.

[0017] In one embodiment of the present application, the connecting portion has a mounting post, the locking member is disposed on an outer wall of the mounting post, the upper cover assembly has a mounting hole, and the mating member is disposed on an inner wall of the mounting hole.

[0018] In one embodiment of the present application, one of the locking member and the matching member is a buckle, and the other is a buckle groove matched with the buckle, or the locking member and the matching member are two buckles connected by buckling;

[0019] By pressing downward or pulling upward on the pump head, the buckle is deformed to achieve locking or unlocking of the pump head and the pump machine.

[0020] In one embodiment of the present application, the medical pump further comprises a limiting structure, which can be raised and lowered at the top of the pump machine to limit the circumferential position of the pump head.

[0021] In one embodiment of the present application, the limiting structure includes an elastic member and a blocking member. The elastic member is arranged on the pump and connected to the blocking member. The elastic force of the elastic member can make the blocking member protrude from the top of the pump to block the circumferential movement of the pump head.

[0022] In one embodiment of the present application, the pump head further has an outlet pipe, which is arranged and extended in a tangential manner, and the top of the pump machine has an avoidance gap, which corresponds to the outlet pipe.

[0023] In one embodiment of the present application, the medical pump is a magnetically levitated blood pump.

[0024] In one embodiment of the present application, the connecting part has a first accommodating cavity inside, and the first accommodating cavity is used to accommodate the magnetic coupling component. The upper cover assembly has a second accommodating cavity inside, and the second accommodating cavity is used to accommodate the magnetic field generating component. The magnetic coupling component forms a magnetic coupling with the magnetic field generating component to drive the impeller in the pump head to rotate under the action of the magnetic moment.

[0025] An extracorporeal assisted circulation system comprises a host, an oxygenator and a medical pump as described in any of the above technical features, wherein the medical pump and the oxygenator are respectively connected to the host, an outlet pipe of the medical pump is connected to the oxygenator, and the host controls the operation of the medical pump and the oxygenator.

[0026] After adopting the above technical solution, this application has at least the following technical effects:

[0027] The medical pump and extracorporeal assisted circulation system of the present application, in which the bottom of the pump head has a connecting part, the top of the pump machine has an upper cover assembly, a locking piece is arranged on the connecting part, and a matching piece is arranged on the upper cover assembly, and the pump head is locked or unlocked to the pump machine through the cooperation of the locking piece and the matching piece. When the medical pump is working, the pump head is installed on the top of the pump machine, and the pump head is installed on the top of the pump machine. The locking piece can be locked and matched with the matching piece to reliably lock the pump head to the pump machine to prevent the pump head from falling off from the top of the pump machine when working. After the work is completed, the pump head is operated to separate the locking piece from the matching piece to realize the disassembly of the pump head.

[0028] The medical pump is provided with a locking piece at the connection part of the pump head, and a matching piece is provided at the upper cover assembly of the pump machine, and the pump head and the pump machine are locked by connecting or disengaging the locking piece and the matching piece. Moreover, the locking piece and the matching piece are directly provided on the original parts of the pump head and the pump machine, and no new parts need to be added, which reduces the cost. At the same time, the setting form of the locking piece and the matching piece can be simplified, the complexity of the locking structure can be reduced, the cleaning is convenient, the installation and disassembly of the pump head and the pump machine is convenient, and the pump head can be reliably locked to the pump machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional diagram of a medical pump according to an embodiment of the present application.

[0030] Figure 2 for Figure 1 A schematic diagram of a medical pump in a cross-section with the hatching removed according to one embodiment is shown.

[0031] Figure 3 for Figure 1 Schematic diagram of a pump head in a medical pump shown.

[0032] Figure 4 for Figure 2 Schematic diagram of the mating parts in the medical pump shown.

[0033] Figure 5 for Figure 1 Schematic diagram of the pump mechanism in a medical pump is shown.

[0034] Figure 6 for Figure 1 The schematic diagram of the pump head in the medical pump is shown installed in the pump machine.

[0035] Figure 7 for Figure 1 A partial schematic diagram of a medical pump in which a pump head is removed from a pump machine is shown.

[0036] Figure 8 for Figure 1 A schematic diagram of a medical pump in another embodiment is shown in section with the hatching removed.

[0037] Fig. 9 for Figure 1 The schematic diagram of the medical pump shown is applied to an extracorporeal circulatory system.

[0038] Wherein: 10, medical pump; 100, pump head; 110, outlet pipe; 120, connection part; 121, mounting hole; 200, pump machine; 210, avoidance gap; 220, upper cover assembly; 221, mounting column; 222, mounting groove; 300, first threaded part; 400, second threaded part; 500, limiting structure; 600, buckle; 70, oxygenator; 80, main unit; H, screw connection length; P, pitch. 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] See also Figure 1 and Figure 2 The present application provides a medical pump 10. The medical pump 10 is used in an extracorporeal circulatory system and cooperates with a host 80 and an oxygenator 70 of the extracorporeal circulatory system. The host 80 can control the operation of the medical pump 10 and the oxygenator 70. Figure 1 This is a three-dimensional diagram of a medical pump 10 according to an embodiment of the present application. Figure 2 for Figure 1 The schematic diagram of the medical pump 10 after the section view is shown. The principle of the extracorporeal circulatory system is to draw the venous blood in the body out of the body, and then inject it into the patient's arterial or venous system after oxygenation through an artificial heart-lung bypass (oxygenator 70) made of special materials. The extracorporeal circulatory system plays the role of extracorporeal respiratory support or cardiac support through the host 80, the medical pump 10 and the oxygenator 70, and is used to realize the oxygenation and blood supply of human organs and tissues.

[0046] It is understandable that the locking mechanism of the pump head and the pump machine is generally arranged on the pump machine, and there is only one protruding or recessed locking feature on the pump head to cooperate with the locking tongue of the locking mechanism to achieve reliable installation of the pump head on the pump machine. However, the locking mechanism on the pump machine is generally large in size and poor in cleanliness, which affects the performance of use, and the cost is relatively high. For this reason, the present application provides a new type of medical pump 10, which can reliably lock the pump head 100 to the pump machine 200 while simplifying the locking structure of the pump head 100 and the pump machine 200, reducing the complexity, facilitating the disassembly of the pump head 100 and the pump machine 200, reducing costs, and facilitating cleaning. The specific structure of the medical pump 10 of an embodiment is introduced below.

[0047] See also Figures 1 to 4 In one embodiment, the medical pump 10 includes a pump 200, a pump head 100, a locking piece and a matching piece. The top of the pump 200 has an upper cover assembly 220, and the bottom of the pump head 100 has a connecting portion 120, and the connecting portion 120 is matched and connected with the upper cover assembly 220 to detachably fix the pump head 100 to the top of the pump 200; the locking piece is provided on the connecting portion 120, and the matching piece is provided on the upper cover assembly 220, and the locking piece and the matching piece are locked and matched to lock the pump head 100 to the pump 200. Figure 3 for Figure 1A schematic diagram of a pump head 100 in a medical pump 10 is shown. Figure 4 for Figure 2 A schematic diagram of the mating parts in the medical pump 10 is shown.

[0048] The medical pump 10 is a power component of the extracorporeal assisted circulation system, providing power for the flow of liquids such as blood. The medical pump 10 is set in the host 80 and connected to the oxygenator 70. When the host 80 controls the operation of the medical pump 10, the medical pump 10 can drive the blood entering it to flow, so that the blood enters the oxygenator 70 from the medical pump 10 for oxygenation, and the oxygenated blood returns to the body. Figure 1 The direction shown is used as a reference, the upper part of the medical pump 10 is the top, and the lower part of the medical pump 10 is the bottom. In addition, this orientation is also applicable to other components of the medical pump 10, which will not be described in detail below.

[0049] The pump machine 200 is the main structure of the medical pump 10, providing power for the movement of the medical pump 10, and the pump head 100 provides blood flow. After the pump head 100 is installed on the pump machine 200, blood can enter the pump head 100. When the pump machine 200 outputs a rotational motion, it can drive the pump head 100 to rotate and make the blood do centrifugal motion in the pump head 100, providing power for the flow of blood, and then the blood can circulate through the pump head 100 to the outside of the pump head 100 and enter other circulation equipment, such as the oxygenator 70. The pump head 100 is detachably installed on the top of the pump machine 200. In this way, the operator can disassemble the pump head 100 for replacement.

[0050] The bottom of the pump head 100 has a connecting portion 120, which is protruding from the bottom surface of the pump head 100 and extending in a direction toward the pump machine 200. The pump machine 200 includes a pump machine body and an upper cover assembly 220, and the upper cover assembly 220 is sealingly arranged on the top of the pump machine body to seal the pump machine 200. At the same time, the upper cover assembly 220 can also be connected to the connecting portion 120 to achieve a detachable connection between the pump machine 200 and the pump head 100. It is worth noting that the specific structure of the upper cover assembly 220, the pump machine body and the pump head is prior art and will not be repeated here. The main purpose of this application is how to achieve reliable locking and convenient unlocking of the pump head 100 and the pump machine 200, which will be described centered on this point later.

[0051] In order to ensure that the pump head 100 can be reliably locked on the top of the pump machine 200, the present application provides a locking member and a matching member, wherein the locking member is provided on the connecting portion 120, and the matching member is provided on the upper cover assembly 220. When the pump head 100 is installed on the pump machine 200, the connecting portion 120 of the pump head 100 is aligned with the upper cover assembly 220 of the pump machine 200, and the pump head 100 is operated to connect the connecting portion 120 with the upper cover assembly 220, so that the locking member and the matching member can be locked and matched, so that the pump head 100 can be reliably fixed on the pump machine 200, and the pump head 100 is prevented from being separated from the pump machine 200. When disassembling, the pump head 100 is operated so that the locking member and the matching member can be separated, and at this time, the connecting portion 120 gradually moves away from the upper cover assembly 220, so as to realize the disassembly of the pump head 100.

[0052] The pump head 100 is reliably fixed to the pump machine 200 by the locking cooperation of the locking member and the matching member. At the same time, since the connecting portion 120 is the original structure of the pump head 100 and the upper cover assembly 220 is the original structure of the pump machine 200, after the locking member is arranged on the connecting portion 120 of the pump head 100 and the matching member is arranged on the upper cover assembly 220 of the pump machine 200, there is no need to add new components to the pump head 100 and the pump machine 200, and there is no need to change the original structure of the pump head 100 and the pump machine 200, thereby simplifying the specific structure of the locking structure, avoiding the setting of too many locking structures on the pump machine 200, reducing the complexity of the structure, and facilitating the design and production of the medical pump 10. Moreover, after the locking member is connected to the matching member, the pump head 100 can be directly fixed to the top of the pump machine 200, reducing the distance between the pump head 100 and the pump machine 200, and facilitating the pump machine 200 to drive the blood in the pump head 100 to rotate.

[0053] When the medical pump 10 of the present application is used, the connecting portion 120 of the pump head 100 is installed to the upper cover assembly 220 of the pump machine 200, and then the pump head 100 is operated so that the connecting portion 120 is installed to the upper cover assembly 220 through the locking member and the matching member, so that the pump head 100 is reliably installed to the pump machine 200. At this time, the medical pump 10 can work and provide power for the flow of blood. After the medical pump 10 is completed, the pump head 100 needs to be disassembled to facilitate the installation of the next pump head 100. At this time, the pump head 100 is operated to disengage the matching member, and then the pump head 100 can be disassembled from the top of the pump machine 200.

[0054] In the medical pump 10 of the above embodiment, a locking member is provided at the connection portion 120 of the pump head 100, and a matching member is provided at the upper cover assembly 220 of the pump machine 200, and the pump head 100 and the pump machine 200 are locked by connecting or disconnecting the locking member and the matching member. Moreover, the locking member and the matching member are directly provided on the original components of the pump head 100 and the pump machine 200, without adding new components, thus reducing costs. At the same time, the arrangement of the locking member and the matching member can be simplified, the complexity of the locking structure can be reduced, cleaning can be facilitated, the installation and disassembly of the pump head 100 and the pump machine 200 can be facilitated, and the pump head 100 can be reliably locked to the pump machine 200.

[0055] See also Figures 1 to 4 In one embodiment of the present application, the locking member and the matching member are threaded matching structures, and the locking member and the matching member are screwed together by rotating the pump head 100 to achieve locking or unlocking of the pump head 100 and the pump machine 200. That is to say, one of the locking member and the matching member is an external thread, and the other is an internal thread. After the external thread and the internal thread are screwed together, the connection between the connecting portion 120 and the upper cover assembly 220 can be achieved, and then the pump head 100 is locked on the top of the pump machine 200.

[0056] Optionally, the locking member is an internal thread and the matching member is an external thread. In this way, the internal thread of the locking member can be screwed and connected with the external thread of the matching member in one direction to fix the pump head 100. When disassembling the pump head 100, the pump head 100 can be loosened by operating it in another direction. In other embodiments of the present application, the locking member may also have an external thread, and correspondingly, the matching member has an internal thread.

[0057] The present application ingeniously utilizes the threaded structure on the surface where the locking member and the mating member interfere with each other to realize the connection between the connecting portion 120 and the upper cover assembly 220, so that the pump head 100 can be reliably locked to the pump machine 200. When installing the pump head, the connecting portion 120 of the pump head 100 is connected to the upper cover assembly 220 of the pump machine 200 through the threaded structure, and the pump head 100 rotates around the central axis of the pump machine 200 and gradually descends, so that the pump head 100 is screwed and connected to the top of the pump machine 200, ensuring that the pump head 100 is reliably installed on the top of the pump machine 200. When disassembling the pump head 100, the pump head 100 is rotated in the opposite direction around the central axis of the pump machine 200 to gradually rise, so that the connecting portion 120 gradually separates from the upper cover assembly 220, and the pump head 100 is disassembled from the pump machine 200.

[0058] Optionally, the medical pump 10 is a magnetically suspended blood pump. That is, the pump head 100 and the pump machine 200 are adsorbed by magnetic force. The locking member and the matching member with a threaded structure can realize the locking function without taking up extra space and design complexity of the entire blood pump, and can significantly reduce the structural size of the locking member and the matching member, without having to set a complex locking mechanism on the pump machine 200, thereby reducing costs and being particularly convenient for cleaning.

[0059] At the same time, the locking member and the mating member of the threaded structure can also facilitate the detachable connection between the pump head 100 and the pump machine 200. In conventional operation, when the pump head is installed and locked, the pump head is usually inserted into the pump machine by a rotation action and then locked by a locking mechanism specially provided on the side. When unlocking, the locking mechanism is driven by one hand to release the locking relationship, and the pump head is rotated by the other hand to remove it from the pump machine.

[0060] In the present application, the pump head 100 and the pump machine 200 are cleverly utilized to rotate during the installation and unlocking process, and a threaded locking member and a matching member are directly set on the central interference surface between the traditional pump head 100 and the pump machine 200, eliminating the locking mechanism in the traditional technology. In addition, the entire installation and unlocking operation process of the pump head 100 and the pump machine 200 can be achieved by rotating the pump head 100 smoothly with two hands. Especially for the magnetic suspension blood pump, due to the magnetic attraction between the pump head 100 and the pump machine 200, when the pump head 100 is moved upward to remove it from the pump machine 200, the pump head 100 is operated with both hands to apply a larger and more reliable force, which is convenient for performing the disassembly operation. Specifically, when the pump head 100 is disassembled, it can be spirally ascended through the locking member and the matching member. During the spiral ascending process, the distance between the pump head 100 and the pump machine 200 will gradually increase to reduce the magnetic attraction applied by the pump machine 200 to the pump head 100, so as to facilitate the removal of the pump head 100.

[0061] In one embodiment, the connection portion 120 has a first accommodating cavity inside, the first accommodating cavity is used to accommodate the magnetic coupling member, the upper cover assembly 220 has a second accommodating cavity inside, the second accommodating cavity is used to accommodate the magnetic field generating member, and the magnetic coupling member and the magnetic field generating member form a magnetic coupling to drive the impeller in the pump head 100 to rotate under the action of the magnetic moment. Optionally, the magnetic field generating member is a magnetic ring or the like.

[0062] That is to say, the connecting portion 120 and the upper cover assembly 220 have internal cavities, which are the first accommodating cavity and the second accommodating cavity respectively. The first accommodating cavity and the second accommodating cavity can be used to accommodate the magnetic coupling component in the pump head 100 and the magnetic field generating component in the pump machine 200 respectively. The magnetic field generating component and the magnetic coupling component cooperate to form magnetic coupling, thereby driving the impeller in the pump head 100 to rotate under the action of the magnetic moment.

[0063] In another embodiment of the present application, the locking member and the matching member are a buckle matching structure or a buckle groove matching structure. One of the locking member and the matching member is a buckle, and the other is a buckle groove that matches the buckle, or the locking member and the matching member are two buckles that are buckled and connected. By pressing downward or pulling upward on the pump head 100, the buckle is deformed to achieve locking or unlocking of the pump head 100 and the pump machine 200.

[0064] Optionally, one of the locking member and the matching member is a buckle 600 (eg, a deformable elastic buckle) and the other is a buckle groove (not shown). Figure 8 As shown, the connection between the connecting portion 120 and the upper cover assembly 220 is realized by buckling the buckle 600 in the buckle groove, so that the pump head 100 is installed on the top of the pump machine 200. When disassembling, an external force is applied to the pump head 100 to separate the buckle 600 from the buckle groove. Optionally, the locking member and the matching member are buckles, and the pump head 100 is installed on the top of the pump machine 200 by buckling the buckles. When disassembling, an external force is applied to the pump head 100 to separate the buckles from each other.

[0065] Of course, in other embodiments of the present application, the pump head 100 can also be detachably mounted on the top of the pump machine 200 in other ways, as long as the pump head 100 can be reliably locked and easily disassembled and installed. The following description will only take the threaded matching structure of the locking member and the matching member as an example.

[0066] See also Figures 1 to 4 In one embodiment, the locking member is a first threaded portion 300, and the matching member is a second threaded portion 400. The first threaded portion 300 is disposed on the connecting portion 120, and the second threaded portion 400 is disposed on the upper cover assembly 220. The first threaded portion 300 and the second threaded portion 400 are screwed together to enable the pump head 100 to rotate along the central axis of the pump machine 200 and spirally descend or spirally ascend relative to the pump machine 200 to lock or unlock the pump heads 100 and 200.

[0067] The first threaded portion 300 is disposed on the connection portion 120, and the second threaded portion 400 is disposed on the upper cover assembly 220. When the pump head 100 is installed on the top of the pump machine 200, the connection portion 120 corresponds to the upper cover assembly 220, and the first threaded portion 300 is aligned with the second threaded portion 400. When the operator operates the pump head 100 to rotate clockwise relative to the pump machine 200, the first threaded portion 300 can be screwed and connected with the second threaded portion 400, and then the connection portion 120 and the upper cover assembly 220 cooperate with each other, so that the pump head 100 is installed on the pump machine 200.

[0068] Optionally, the first threaded portion 300 and the second threaded portion 400 are internal threads and external threads. One of the connecting portion 120 and the upper cover assembly 220 is hollow cylindrical, and the other is a mounting groove 222. When the first threaded portion 300 and the second threaded portion 400 are screwed together, the hollow cylindrical shape is set in the mounting groove 222.

[0069] See also Figures 1 to 4In one embodiment, the lead of the first threaded portion 300 and the second threaded portion 400 is adapted to the screwing length of the pump head 100 and the pump 200. Alternatively, the pitch P of the first threaded portion 300 and the second threaded portion 400 is adapted to the screwing connection length H of the pump head 100 and the pump 200. This makes it easier to install and remove the pump head 100.

[0070] This application only uses the pitch P for explanation. When the internal and external threads of the first threaded portion 300 and the second threaded portion 400 are single-start threads, the pitch P of the internal and external threads of the first threaded portion 300 and the second threaded portion 400 is equal to the screw connection length H of the pump head 100 screwed into the pump machine 200. In this way, when disassembling the pump head 100, the operator can operate the pump head 100 to rotate one circle to disengage the internal and external threads, so that the pump head 100 can be easily removed from the pump machine 200.

[0071] When the internal threads and external threads of the first threaded portion 300 and the second threaded portion 400 are multi-start threads, the pitch of the internal threads and external threads of the first threaded portion 300 and the second threaded portion 400 is equal to the screw connection length H of the pump head 100 screwed into the pump machine 200. In this way, when disassembling the pump machine 200, the operator can disengage the internal threads and the external threads by rotating the pump head 100 one circle, so that the pump head 100 can be easily removed from the pump machine 200.

[0072] It is worth noting that if the rotation angle of the pump head 100 needs to be increased or decreased according to demand, the lead or pitch P of the internal and external threads of the first threaded portion 300 and the second threaded portion 400 needs to be increased or shortened proportionally, which will not be elaborated here.

[0073] See also Figures 1 to 4 In one embodiment, the connecting portion 120 has a mounting hole 121, a locking member is disposed on the inner wall of the mounting hole 121, the upper cover assembly 220 has a mounting post 221, a matching member is disposed on the outer wall of the mounting post 221, and the locking member and the matching member are threadedly screwed together so that the mounting post 221 is mounted in the mounting hole 121. Specifically, the connecting portion 120 has an annular profile and defines the mounting hole 121. Optionally, the mounting hole 121 surrounds the central axis of the medical pump 10 (e.g., Figure 2The first threaded portion 300 is arranged on the inner wall of the mounting hole 121, and the upper cover assembly 220 has a mounting column 221 extending into the mounting hole. Optionally, the mounting column 221 is also arranged around the central axis of the medical pump 10, and further selectively, for example, symmetrically arranged around the central axis of the medical pump 10; the second threaded portion 400 is arranged on the outer wall of the mounting column 221, and the first threaded portion 300 and the second threaded portion 400 can be screwed together to enable the mounting column 221 to be stably installed in the mounting hole 121 or to be stably and conveniently separated by rotation.

[0074] That is to say, the first threaded portion 300 is an internal thread, and the second threaded portion 400 is an external thread. The connecting column is arranged in a hollow cylindrical shape, and the hollow space in the upper cover body is the mounting hole 121, and the first threaded portion 300 is an internal thread arranged on the inner wall of the mounting hole 121. The upper cover assembly 220 has a mounting column 221, and the second threaded portion 400 is an external thread arranged on the outer wall of the mounting column 221. When the pump head 100 is installed on the top of the pump machine 200, the first threaded portion 300 is screwed and connected with the second threaded portion 400, and the mounting column 221 gradually extends into the mounting hole 121, so that the connecting portion 120 is gradually installed in the upper cover assembly 220 under the screwing action.

[0075] Of course, in other embodiments of the present application, the connection portion 120 has a mounting post 221, the locking member is disposed on the outer wall of the mounting post 221, the upper cover assembly 220 has a mounting hole 121, the matching member is disposed on the inner wall of the mounting hole 121, and the locking member and the matching member are threadedly engaged to enable the mounting post 221 to be mounted on the mounting hole 121. In other words, the first threaded portion 300 of the locking member is an internal thread, and the second threaded portion 400 of the matching member is an external thread, and the operating principle is substantially the same as that of the above embodiment, and will not be described in detail hereinafter.

[0076] See also Figures 2 to 4 The upper cover assembly 220 also has a mounting groove 222, and the mounting column 221 is disposed in the mounting groove 222. When the first threaded portion 300 is screwed and connected with the second threaded portion 400, the connecting portion 120 gradually enters the mounting groove 222. The mounting groove 222 is a recessed portion at the top of the pump 200. When the pump head 100 is installed on the pump 200, the connecting portion 120 gradually rotates into the mounting groove 222 under the action of the screwing of the thread. When the pump head is disassembled, the connecting portion 120 gradually rotates out of the mounting groove 222 under the action of the screwing of the thread.

[0077] See also Figures 1 to 4In one embodiment, the depth of the mounting groove 222 and the height of the connecting portion 120 are adapted to the lead or pitch P of the first threaded portion 300 and the second threaded portion 400. When the first threaded portion 300 and the second threaded portion 400 are single-start threads, the pitch P of the first threaded portion 300 and the second threaded portion 400 is equal to the depth of the pump head 100 screwed into the mounting space. In this way, when disassembling the pump head 100, the operator can disengage the internal thread and the external thread by rotating the pump head 100 one circle, so that the pump head 100 can be easily removed from the pump machine 200.

[0078] When the first threaded portion 300 and the second threaded portion 400 are multi-start threads, the pitch of the first threaded portion 300 and the second threaded portion 400 is equal to the depth of the pump head 100 screwed into the installation space. In this way, when disassembling the pump 200, the operator can operate the pump head 100 to rotate one circle to disengage the internal thread from the external thread, so that the pump head 100 can be removed from the pump 200.

[0079] See also Figures 1 to 4 In one embodiment, the first threaded portion 300 and the second threaded portion 400 are clearance-matched. That is, after the first threaded portion 300 and the second threaded portion 400 are screwed together, there is a gap between the first threaded portion 300 and the second threaded portion 400, so that the first threaded portion 300 and the second threaded portion 400 can be prevented from being tightly matched, which facilitates the rotation of the pump head 100. Optionally, the threads of the first threaded portion 300 and the second threaded portion 400 have a slope. When the pump head 100 is rotated, the slope of the threads of the first threaded portion 300 and the second threaded portion 400 can facilitate the rotation of the pump head 100.

[0080] See also Figure 1 , Figure 2 , Figures 5 to 7 In one embodiment, the medical pump 10 further includes a limiting structure 500 , which can be lifted and lowered on the top of the pump machine 200 to limit the circumferential position of the pump head 100 . That is, the limiting structure 500 is located on the upper cover assembly 220 . Figure 5 for Figure 1 The schematic diagram of the pump machine 200 in the medical pump 10 shown in FIG. Figure 6 for Figure 1 The schematic diagram of the medical pump 10 in which the pump head 100 is installed on the pump machine 200 is shown. Figure 7 for Figure 1 The medical pump 10 is shown as a partial schematic diagram of the pump head 100 being removed from the pump machine 200. It can be understood that when the pump head 100 is installed, the pump head 100 rotates clockwise relative to the pump machine 200 to be installed on the top of the pump machine 200, and when removed, the pump head 100 rotates counterclockwise relative to the pump machine 200.

[0081] That is to say, when the limiting structure 500 pops up, the limiting structure 500 can lock the pump head 100, and the pump head 100 can be installed and removed only after pressing the limiting structure 500. It is worth noting that the setting position of the limiting structure 500 is related to the rotation direction of the pump head 100. In this application, only the clockwise rotation of the pump head 100 when installing and the counterclockwise rotation of the pump head 100 when removing are used as examples for explanation.

[0082] When the pump head 100 is installed on the top of the pump machine 200, the pump head 100 tends to rotate counterclockwise. For this reason, the present application sets a limiting structure 500 on the top of the pump machine 200, and the limiting structure 500 can be raised and lowered in the clockwise direction of the outlet pipe 110 of the pump head 100. When installing the pump head 100, press the limiting structure 500. At this time, the pump head 100 can rotate in the clockwise direction. When the pump head 100 is installed in place, release the limiting structure 500. At this time, the limiting structure 500 is reset, and the limiting structure 500 protrudes from the top surface of the pump machine 200. If the pump head 100 rotates counterclockwise at this time, the limiting structure 500 will abut against the outlet pipe 110 of the pump head 100, so as to limit the circumferential rotation of the pump head 100. Figure 6 shown.

[0083] When the pump head 100 is disassembled, the limiting structure 500 is pressed, and the limiting structure 500 is retracted into the pump machine 200. At this time, the pump head 100 is operated to rotate counterclockwise, and the outlet pipe 110 of the pump head 100 can pass through the limiting structure 500 and be screwed out. Figure 7 When the pump head 100 passes over the limiting structure 500, the limiting structure 500 can be released.

[0084] See also Figure 1 , Figure 2 , Figures 5 to 7 In one embodiment, the limiting structure 500 includes an elastic member and a blocking member, the elastic member is disposed on the pump 200 and connected to the blocking member, and the elastic force of the elastic member can make the blocking member protrude from the top of the pump 200 to block the circumferential movement of the pump head 100. Optionally, the elastic member is a spring. Optionally, the blocking member is a sleeve.

[0085] The top of the pump 200 has a groove, the elastic member is arranged in the groove, and the blocking member is sleeved on the elastic member and can be slidably arranged in the groove. When the blocking member is pressed, the blocking member can compress the elastic member and retract into the groove. After the blocking member is released, the elastic member drives the blocking member to reset. Of course, in other embodiments of the present application, the limiting structure 500 can also be other structural forms that can achieve limiting.

[0086] See also Figure 1 , Figure 2 , Figures 5 to 7In one embodiment, the pump head 100 further has an outlet pipe 110, which is arranged and extended in a tangential manner, and the top of the pump machine 200 has an avoidance notch 210, and the avoidance notch 210 corresponds to the outlet pipe 110. The pump head 100 has an outlet pipe 110 and an inlet pipe, the inlet pipe inputs blood, and the outlet pipe 110 outputs blood. After the pump head 100 is installed on the pump machine 200, the outlet pipe 110 is located in the avoidance notch 210, and the outlet pipe 110 is limited by the avoidance notch 210 to prevent the pump head 100 from rotating in the circumferential direction. Moreover, the number of the avoidance notches 210 is multiple but not more than four, so as to correspond to the multiple outlet pipes 110.

[0087] When the medical pump 10 of the present application is in use, the pump head 100 is placed on the top of the pump machine 200, the limiting structure 500 is pressed, and then the pump head 100 is rotated clockwise, the first threaded portion 300 and the second threaded portion 400 are gradually screwed together, and the connecting portion 120 is gradually moved into the mounting groove 222 of the upper cover assembly 220. When the pump head 100 is installed in place, the outlet pipe 110 is located in the avoidance gap 210. Then, the limiting structure 500 is released, and the limiting structure 500 axially limits the pump head 100. When disassembling the pump head 100, the limiting structure 500 is pressed, and the pump head 100 is operated to rotate so that the first threaded portion 300 is separated from the second threaded portion 400, and then the limiting structure 500 is released.

[0088] The medical pump 10 of the present application is provided with a locking piece at the connection portion 120 of the pump head 100, and a matching piece is provided at the upper cover assembly 220 of the pump machine 200, and the pump head 100 and the pump machine 200 are locked by connecting or disconnecting with the matching piece. Moreover, the locking piece and the matching piece are directly provided on the original parts of the pump head 100 and the pump machine 200, without adding new parts, reducing costs, and at the same time, it can also simplify the setting form of the locking piece and the matching piece, reduce the complexity of the locking structure, facilitate cleaning, facilitate the installation and disassembly of the pump head 100 and the pump machine 200, and ensure that the pump head 100 is reliably locked to the pump machine 200.

[0089] See also Fig. 9 The present application also provides an extracorporeal assisted circulation system, including a host 80, an oxygenator 70 and a medical pump 10 with any of the above technical features, the medical pump 10 and the oxygenator 70 are respectively connected to the host 80, the outlet pipe 110 of the medical pump 10 is connected to the oxygenator 70, and the host 80 controls the operation of the medical pump 10 and the oxygenator 70. Fig. 9 for Figure 1 The medical pump shown is applied to an extracorporeal circulatory system. The extracorporeal circulatory system adopts the medical pump 10 of the above embodiment, which can facilitate the assembly of the pump head 100 and the pump machine 200, improve assembly efficiency, simplify the locking structure, facilitate operation, and reduce costs.

[0090] 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.

[0091] 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 medical pump, It is characterized in that include: A pump machine, wherein the top of the pump machine is provided with an upper cover assembly; A pump head, wherein the bottom of the pump head has a connecting portion, and the connecting portion is cooperatively connected with the upper cover assembly so as to detachably fix the pump head to the top of the pump machine; A matching piece, disposed on the upper cover assembly; and A locking member is arranged on the connecting portion, and the locking member is locked and matched with the matching member to lock the pump head to the pump machine.

2. The medical pump according to claim 1, It is characterized in that The locking member is a first threaded portion, the matching member is a second threaded portion, the first threaded portion is arranged on the connecting portion, and the second threaded portion is arranged on the upper cover assembly; The first threaded portion is screwed together with the second threaded portion, so that the pump head can rotate along the central axis of the pump and spirally descend or spirally ascend relative to the pump to lock or unlock the pump head and the pump.

3. The medical pump according to claim 2, It is characterized in that The leads of the first threaded portion and the second threaded portion are adapted to the screw connection length between the pump head and the pump machine; Alternatively, the pitches of the first threaded portion and the second threaded portion are adapted to the screwed connection length between the pump head and the pump machine.

4. The medical pump according to claim 1, It is characterized in that The connecting portion has a mounting hole, the locking piece is arranged on the inner wall of the mounting hole, the upper cover assembly has a mounting column, and the matching piece is arranged on the outer wall of the mounting column.

5. The medical pump according to claim 4, It is characterized in that The upper cover assembly also has a mounting groove, the mounting post is arranged in the mounting groove, and when the matching piece is connected to the locking piece, the connecting part gradually enters the mounting groove.

6. The medical pump according to claim 4, It is characterized in that The mounting holes and the mounting columns are symmetrically arranged around the central axis of the medical pump.

7. The medical pump according to claim 1, It is characterized in that The connecting portion has a mounting post, the locking piece is arranged on the outer wall of the mounting post, the upper cover assembly has a mounting hole, and the matching piece is arranged on the inner wall of the mounting hole.

8. The medical pump according to claim 1, It is characterized in that One of the locking member and the matching member is a buckle, and the other is a buckle groove matched with the buckle, or the locking member and the matching member are two buckles connected in a buckling manner; By pressing downward or pulling upward on the pump head, the buckle is deformed to achieve locking or unlocking of the pump head and the pump machine.

9. The medical pump according to any one of claims 1 to 8, It is characterized in that The medical pump further comprises a limiting structure, which is liftably arranged at the top of the pump machine and is used for circumferentially limiting the pump head.

10. The medical pump according to claim 9, It is characterized in that The limiting structure includes an elastic member and a blocking member. The elastic member is arranged on the pump and connected to the blocking member. The elastic force of the elastic member can make the blocking member protrude from the top of the pump to block the circumferential movement of the pump head.

11. The medical pump according to any one of claims 1 to 8, It is characterized in that The pump head also has an outlet pipe, which is arranged and extended in a tangential manner. The top of the pump machine has an avoidance gap, which corresponds to the outlet pipe.

12. The medical pump according to any one of claims 1 to 8, It is characterized in that The medical pump is a magnetically levitated blood pump, the connecting portion has a first accommodating chamber inside, the first accommodating chamber is used to accommodate a magnetic coupling component, the upper cover assembly has a second accommodating chamber inside, the second accommodating chamber is used to accommodate a magnetic field generating component, the magnetic coupling component forms a magnetic coupling with the magnetic field generating component to drive the impeller in the pump head to rotate under the action of a magnetic moment.

13. An extracorporeal circulatory system, It is characterized in that It comprises a host, an oxygenator and the medical pump according to any one of claims 1 to 12, wherein the medical pump and the oxygenator are respectively connected to the host, an outlet pipe of the medical pump is connected to the oxygenator, and the host controls the operation of the medical pump and the oxygenator.

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