Fixation devices and extracorporeal circulation system

Abstract

This invention provides a fixing device and an extracorporeal circulation system. The fixing device includes a base, a cover plate, an ejector component, a push-button component, and a fixing member. The base has a first groove, and the side wall of the first groove has a through hole. The fixing member is disposed in the first groove. The cover plate has a second through hole. The ejector component has a first protrusion and is elastically connected to the bottom of the first groove. The push-button component has a third through hole, through which the push-button component passes, and the first protrusion protrudes through the third through hole. When the ejector component is in its initial position, the first protrusion extends out of the second through hole, and the ejector component abuts against the fixing member. When the ejector component is subjected to an external force and moves downward, it moves downward, and the fixing member slides away from the side wall of the first groove, pressing the push-button component, which moves along the first through hole and engages with the ejector component, thus fixing the pump. The pump can be removed by pressing the push-button component with one hand.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a fixation device and an extracorporeal circulation system. Background Technology

[0002] Extracorporeal blood circulation devices, as medical devices that pump blood, typically consist of two parts: a pump head and a pump unit. During use, the pump head is connected and fixed to the pump unit, which is then mounted on a fixed device. Currently, disassembling the pump unit from the fixed device requires both hands, which is inconvenient.

[0003] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a fixing device and an extracorporeal circulation system that enable quick one-handed disassembly / assembly of a pump.

[0005] To achieve the above objectives, this utility model provides a fixing device, comprising: a base, a cover plate, an ejector component, a push-button component, and a fixing member; the base has a first groove, and the side wall of the first groove has a through hole; the cover plate is detachably connected to the base, and the cover plate has a second through hole; the ejector component has a first protrusion, and the ejector component is elastically connected to the bottom of the first groove; the push-button component has a third through hole, the push-button component passes through the first through hole, and the first protrusion protrudes through the third through hole; the push-button component moves axially along the first through hole, so that it can be detachably connected to the ejector component; the fixing member is disposed in the first groove; when the ejector component is in the initial position, the first protrusion extends out of the second through hole, and the ejector component abuts against the fixing member; when the ejector component is subjected to an external force and moves downward, the fixing member slides away from the side wall of the first groove until the ejector component and the fixing member are engaged.

[0006] Optionally, it also includes a housing surrounding the outside of the base, with a receiving space formed between the housing and the base in the vertical direction, and the cover plate located within the receiving space.

[0007] Optionally, the first through hole extends through the side wall near the cover plate, and the axial direction of the first through hole is perpendicular to the extending direction of the groove; and / or, the base is provided with a second groove, which is disposed opposite to the first through hole and located on both sides of the first groove.

[0008] Optionally, it also includes a first elastic component, the two ends of which are respectively connected to the bottom of the first groove and the ejector component; the ejector component also includes a body, the first protrusion is provided on the body, one end of the body has a second protrusion, and the second protrusion is detachably connected to the pressing component.

[0009] Optionally, it may also include an elastic clamping part, which is disposed on the pressing member and is detachably connected to the second protrusion.

[0010] Optionally, it also includes a second elastic component and a third elastic component. The number of the fixing components is two. The two fixing components are respectively connected to the sidewall of the first groove through the second elastic component and the third elastic component, and the two fixing components are arranged symmetrically.

[0011] Optionally, the fixing member has a third protrusion, and the cover plate has a third groove. The third protrusion is adapted to the corresponding third groove, and the third protrusion can slide along the third groove.

[0012] Optionally, it also includes a locking component and a limiting component, wherein the locking component is slidably disposed on the housing, and the limiting component is disposed on the pressing component; when the locking component is in the first position, the locking component is engaged with the limiting component, and when the locking component is in the second position, the locking component is disengaged from the limiting component.

[0013] Optionally, a heat dissipation structure is also included, which is mounted on the cover plate and is used to connect to the pump. The heat dissipation structure includes a housing, a thermally conductive layer, and a circuit board. The thermally conductive layer is disposed inside the housing, and the circuit board is disposed on the thermally conductive layer.

[0014] Optionally, the housing has a cavity, and a protrusion is provided in the cavity. The heat-conducting layer is disposed on the protrusion and is adapted to the protrusion.

[0015] To achieve the above objectives, this utility model provides an extracorporeal circulation system, including the aforementioned fixation device.

[0016] Compared with the prior art, the present invention provides the following beneficial effects:

[0017] The aforementioned fixing device includes a base, a cover plate, an ejector component, a push-button component, and a fixing member. The base has a first groove, and the side wall of the first groove has a through hole. The fixing member is disposed in the first groove. The cover plate is detachably connected to the base, and a second through hole is provided on the cover plate. The ejector component has a first protrusion, and the ejector component is elastically connected to the bottom of the first groove. A third through hole is provided on the push-button component, and the push-button component passes through the first through hole. The first protrusion passes through the third through hole, and the push-button component moves axially along the first through hole, so that the push-button component and the ejector component can be detachably connected. When the ejector component is in its initial position, before the pump is placed on the cover plate, the first protrusion extends out of the second through hole under the action of elastic force, and the ejector component abuts against the fixing component, which remains fixed in place. When the ejector component is subjected to external force and moves downward, i.e., when the pump is installed on the cover plate, the ejector component moves downward under the weight of the pump, and the abutment force of the ejector component against the fixing component gradually disappears, causing the fixing component to slide away from the side wall of the first groove until the ejector component moves downward and engages with the fixing component. At this point, pressing the actuating component causes it to move along the first through hole and engage with the ejector component, thus fixing the pump. When it is necessary to remove the pump, the pump is lifted, and the ejector component is no longer subjected to external force. Under the action of elastic force, the ejector component moves upward, causing it to disengage from the actuating component and push the fixing component towards the side wall of the first groove until it abuts against the fixing component, thus removing the pump. Therefore, the pump can be dismantled by pressing the fixed parts and removing them, thus enabling the pump to be quickly dismantled and installed, and can be done with one hand. Attached Figure Description

[0018] Figure 1 A schematic diagram of the fixing device provided in one embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the heat dissipation structure provided in one embodiment of the present invention;

[0020] Figure 3 This is a structural diagram of a portion of the fixing device provided in one embodiment of the present utility model. Detailed Implementation

[0021] The fixing device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, only for the purpose of conveniently and clearly illustrating the embodiments of this utility model. Please refer to the drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in proportions, or adjustments to the size, provided that the effects and purposes achieved by this utility model are the same or similar, should still fall within the scope of the technical content disclosed in this utility model. Specific design features of this utility model disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and usage environment. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different figures to denote the same parts or parts having the same function, and their repeated descriptions are omitted. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The singular forms “a,” “one,” and “the” include plural objects. The term “or” is generally used to mean “and / or.” The term “several” is generally used to mean “at least one.” The term “at least two” is generally used to mean “two or more.” The term “multiple” is generally used to mean “at least two.”

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The core idea of ​​this utility model is to provide a fixing device that enables quick one-handed disassembly / assembly of the pump machine. Please refer to... Figures 1-3 One embodiment of the fixing device 100 includes a base 110, a cover plate 120, an ejector 130, a push-button member 140, and a fixing member 150. This fixing device 100 is used in an extracorporeal circulation system, enabling quick disassembly and assembly of its pump.

[0025] The base 110 has a first groove 111, and the sidewall of the first groove has a through hole 112. In one embodiment, the extending direction of the first groove 111 is perpendicular to the central axis direction of the first through hole 112, thereby facilitating the pressing of the subsequent pressing component and making operation convenient. Further, the base 110 is cylindrical, thereby facilitating installation with the pump and reducing the floor space occupied during use. In one embodiment, the fixing device also includes a housing 160, which surrounds the outside of the base 110. The housing 160 and the base 110 form a receiving space in the vertical direction, and a cover plate 120 is located within this receiving space. Here, the vertical direction refers to the vertical direction. When the base 110 is cylindrical, the vertical direction is the extending direction of its central axis. The height of the housing 160 in the vertical direction is greater than the height of the base 110 in the vertical direction, thereby forming a receiving space in the vertical direction. The height of the cover plate 120 can be less than the height of the receiving space, thereby making the overall structure more compact.

[0026] The cover plate 120 is detachably connected to the base 110, and a second through hole 121 is provided on the cover plate 120. The cover plate 120 is disposed on the base 110, and the lower surface of the cover plate 120 and the upper surface of the base 110 have the same dimensions and are compatible. When the base 110 is cylindrical, the cross-section of the cover plate 120 is also circular. In one embodiment, the side wall of the first through hole near the cover plate 120 is through-hole, that is, the side wall of the first through hole 112 is through-hole to form a groove structure. In this case, it can be seen that an approximately "T"-shaped groove is provided on the base 110. This structure is easy to process and has a compact structure. The cover plate 120 and the base 110 can be detachably connected by fixing screws 170, etc.

[0027] The ejector component 130 has a first protrusion 131, and is elastically connected to the bottom of the first groove. Specifically, the end of the ejector component 130 away from the first protrusion 131 is elastically connected to the bottom of the first groove, and the end of the ejector component 130 with the first protrusion 131 is a free end. The actuating component 140 has a third through hole 141, the actuating component passes through the first through hole 112, the first protrusion 131 protrudes out of the third through hole 141, and the actuating component 140 moves axially along the first through hole 112, that is, the actuating component 140 moves along the central axis of the first through hole 112, so that the actuating component 140 and the ejector component 130 can be detached. In other words, when a pressing force is applied to the actuating component 140, the actuating component 140 moves forward and can engage with the ejector component 130. When the pump is removed, the actuating component 140 can disengage from the ejector component 130. The third through hole 141 can be an oblong hole, allowing the ejector component 130 to slide along the third through hole 141. Furthermore, one end of the pressing component 140 can be elastically connected to the side wall of the housing 160 via a spring 142, thereby facilitating the pressing of the pressing component 140.

[0028] The fixing member 150 is disposed in the first groove 111. When the ejector member 130 is in the initial position, the first protrusion 131 passes through the third through hole 141 and extends out of the second through hole 121, and the ejector member 130 abuts against the fixing member 150. When the ejector member 130 is subjected to an external force and moves downward, the fixing member 150 slides away from the side wall of the first groove until the ejector member 130 and the fixing member 150 are engaged. Specifically, when the ejector member 130 is in the initial position, that is, when the pump has not yet been placed on the cover plate 120 and the ejector member 130 is not subjected to an external force, the first protrusion 131 extends out of the second through hole 121, and the side of the ejector member 130 abuts against the fixing member 150. Since one end of the ejector component 130 is elastically connected to the bottom of the first groove, when the ejector component 130 is in its initial position, under the action of elastic force, the ejector component 130 extends out of the second through hole 121, and the fixing member 150 is fixed in place by the ejector component 130. Furthermore, the side of the ejector component 130 can abut against the middle area of ​​the fixing member 150 in the vertical direction.

[0029] When the ejector component 130 is subjected to an external force and moves downward, i.e., when the pump is installed on the cover plate, the ejector component 130 moves downward under the gravity of the pump. At the same time, the contact force between the ejector component 130 and the fixing member gradually decreases, causing the fixing member 150 to slide away from the side wall of the first groove until the ejector component 130 moves downward and engages with the fixing member 150. In other words, when the ejector component 130 moves vertically downward under the gravity of the pump, the ejector component 130 moves downward along the side wall of the fixing member 150, and the fixing member 150 moves to the side until the ejector component 130 is compressed to the point where it can no longer move downward. At this time, because the ejector component 130 moves downward, it can engage with the lower area of ​​the fixing member 150. Next, the pressing component 140 is pressed, causing it to move along the first through hole 112 and engage with the ejector component 130, thus securing the pump. When the pump needs to be removed, it is lifted, and the ejector component 130, no longer under external force, moves upward under elastic force, disengaging from the pressing component 140 and pushing the fixing component 150 towards the side wall of the first groove until it abuts against the fixing component 150, thus removing the pump. The ejector component 130 then returns to its initial position. Therefore, the pump can be removed simply by fixing it with the pressing component 140 and removing it, enabling rapid removal and installation of the pump, which can be done with one hand.

[0030] In one embodiment, the base 110 has a second groove 113, which is opposite to the first through hole 113, and the second groove 113 and the first through hole 112 are located on both sides of the first groove 111. That is, the groove on the base 110 is opened along a first direction, and the second groove 113 and the first through hole 112 are both opened in a second direction. The first direction and the second direction are perpendicular, and both the first direction and the second direction are radial to the base 110. In addition, the first through hole 112 and the second groove 113 extend in the same direction, which is radial to the base 110. The second groove 113 provides space for the movement of the pressing member 140. Furthermore, the width of the second groove 113 can be adapted to the width of the pressing member 140, so that when one end of the pressing member 140 is pushed, the pressing member 140 moves in the direction of the ejector member 130, and the other end of the pressing member 140 can be engaged in the second groove 113.

[0031] Furthermore, in one embodiment, the fixing device 100 further includes a first elastic member 180, with its two ends connected to the bottom of the first groove 111 and the ejector member 130, respectively. The first elastic member 180 can be a spring or the like. The first elastic member 180 provides an elastic force to the ejector member 130 when the pump is removed, causing it to move upwards. Even further, in one embodiment, the ejector member 130 also includes a body 132, with a first protrusion 131 on the body 132. One end of the body 132 has a second protrusion 133, which is detachably connected to the pressing member 140. For more details, please refer to [link to relevant documentation]. Figure 1 A first protrusion 131 is provided on the body 132, extending in a vertical direction. A second protrusion 133 extends perpendicularly to the vertical direction and faces the direction of the pressing member 140. Both sides of the body 132 abut or engage with the fixing member 150 during the up-and-down movement of the ejector member 130. Furthermore, there is a smooth transition between the body 132 and the second protrusion 133.

[0032] In one embodiment, the fixing device further includes an elastic clamping portion 190, which is disposed on the pressing member 140 and is detachably connected to the second protrusion 133. Specifically, the elastic clamping portion 190 is located below the pressing member 140 and can be detachably connected to the pressing member 140 via a fixing screw 191. Further, the elastic clamping portion 190 has an opening 192 facing the ejector member 130. When the pressing member 140 is pressed, the opening 192 of the elastic clamping portion 190 clamps the third protrusion 133. The arms on both sides of the opening 192 are elastic, thereby facilitating the clamping of the third protrusion 133. Furthermore, the width of the opening 192 matches the width of the third through hole 141, which, as described above, is an oblong hole. Furthermore, the maximum width of the third protrusion 133 can be the same as the width of the third through hole 141, so that when the pump is removed, the ejector 130 moves upward under the action of the first elastic member 180, and the third protrusion 133 disengages from the opening 192. Further, to better achieve the disengagement of the third protrusion 133 from the elastic clamping part 190, one end of the third protrusion 133 is connected to the body 132, and the other end has a protrusion extending vertically. This protrusion includes upper and lower parts with different cross-sections; the lower part has a smaller cross-section than the upper part, and the two parts transition smoothly. With this structure, the position of the upper and lower parts can be detachably connected to the elastic clamping part 190. The difference in cross-section between the upper and lower structures makes it easier for the third protrusion 133 to disengage from the elastic clamping part 190.

[0033] To better achieve the abutment or snap-fit ​​between the ejector component 130 and the fixing member 150, in one embodiment, there are two fixing members 150, which are symmetrically arranged. In this embodiment, the fixing device 100 also includes a second elastic member 193 and a third elastic member 194, and the two fixing members 150 are respectively connected to the sidewall of the first groove through the second elastic member 193 and the third elastic member 194. The second elastic member 193 and the third elastic member 194 can both be springs or the like. With this structure, through the elastic connection between the two fixing members 150 and the sidewall of the first groove, when the ejector component 130 is in its initial position, the two sides of the ejector component 130 abut against the middle area of ​​the fixing member 150. At this time, the second elastic member 193 and the third elastic member 194 are in a compressed state under the force of the ejector component 130. When the ejector component 130 is subjected to the gravity of the pump, it moves downward in the vertical direction. Simultaneously, the contact force between the ejector component 130 and the fixing member 150 gradually decreases. Under the elastic potential energy of the second elastic member 193 and the third elastic member 194, the two fixing members 150 slide away from the sidewall of the first groove, and the second elastic member 193 and the third elastic member 194 are released until the ejector component 130 engages with the fixing member 150. In other words, as the ejector component 130 moves downward, the first elastic member is compressed until it is fully compressed, at which point the side of the ejector component 130 engages with the lower region of the fixing member 150. It should be noted that in some embodiments, the cross-section of the lower region of the fixing part 150 is smaller than the cross-section of the middle region of the fixing member 150, and the lower region and the middle region are arc transitioned, which facilitates the downward movement of the ejector member 130 and its engagement with the lower region of the fixing part 150. Furthermore, when the pump is removed, the ejector member 130 moves upward under the action of the first elastic member. Due to the arc transition, the ejector member 130 can quickly abut against the fixing part 150 under the action of the elastic potential energy of the first elastic member.

[0034] Furthermore, in one embodiment, the fixing part 150 has a third protrusion 151, and the cover plate 120 has a third groove. The third protrusion 151 is adapted to the corresponding third groove, and the third protrusion 151 can slide along the third groove. Specifically, the third protrusion 151 is inverted "L" shape, extends vertically, and the cover plate 120 has a third groove. The third protrusion 151 can extend into the third groove and slide along the bottom of the third groove. When the ejector 130 is in the initial position, the fixing part 150 is pressed, and the third protrusion 151 abuts against the side wall of the third groove; when the ejector moves downward, the third protrusion 151 slides along the bottom of the third groove. Furthermore, in one embodiment, the cover plate 120 has a body 122 and a protrusion 123, the protrusion 123 being formed by extending from the body 122 in a vertical direction, and a second through hole 121 penetrating the protrusion 123 and the body 122 in a vertical direction. A third groove is formed on the sidewall of the second through hole 121, and the third groove communicates with the second through hole 121.

[0035] In one embodiment, to prevent the pump from accidentally detaching from the fixing device, the fixing device 100 further includes a locking component 195 and a limiting component 196. The locking component 195 is slidably disposed on the housing 160, and the limiting component 196 is disposed on the pressing component 140. When the locking component 195 is in a first position, the locking component 195 is engaged with the limiting component 196; when the locking component 196 is in a second position, the locking component 195 is disengaged from the limiting component 196. Specifically, the locking component 195 can be a button that can slide left and right along the housing 160. The housing 160 may have a through hole, through which the locking component 195 passes and can slide left and right along the through hole. The limiting component 196 can be a limiting screw, etc., and is disposed on the pressing component. When the locking component 195 slides in a certain direction, such as to the left, it engages with the limiting component 196. Since the limiting component 196 is located on the pressing component 140, it locks the pressing component 140, thus preventing the pump from being removed and achieving the purpose of preventing accidental activation. When the locking component 195 slides in the opposite direction, i.e., to the right, it disengages from the limiting component 196, allowing the pump to be removed.

[0036] In one embodiment, such as Figure 2 and Figure 3 As shown, the fixing device 100 also includes a heat dissipation structure 197, which is mounted on the cover plate 120 and is used to connect to the pump. That is, the heat dissipation structure 197 is detachably connected to the pump. When the pump is placed, the heat dissipation structure 197 is mounted on the cover plate 120. When the pump is removed, the heat dissipation structure 197 is removed along with the pump, and the heat dissipation structure 197 is separated from the cover plate 120.

[0037] The heat dissipation structure 197 includes a housing 1110, a heat-conducting layer 1120, and a circuit board 1130. The heat-conducting layer 1120 is disposed within the housing 1110, and the circuit board 1130 is disposed on the heat-conducting layer 1120. Specifically, the circuit board 1130 has multiple chips 1131, and the heat-conducting layer 1120 is located between the circuit board 1130 and the housing 1110. The heat-conducting layer 1120 can be thermal grease, and the housing 1110 can be made of metal, thereby improving heat conduction and dissipation. The sum of the height of the housing 1110 and the height of the cover plate 120 can be the same as the height of the aforementioned accommodating space, making the overall structure of the device more compact. Further, in one embodiment, the housing 1110 has a cavity 1111, within which a protrusion 1112 is provided. The heat-conducting layer 1120 is disposed on the protrusion 1112, and the heat-conducting layer 1120 is adapted to the protrusion 1112. In other words, the thermally conductive layer 1120 is completely fitted to the protrusion 1112, thereby reducing the thermal resistance of the entire device. Furthermore, this structure of the heat dissipation structure 197 avoids wasting the space between the housing 1110 and the circuit board 1130, while also providing space for the pump's hot shoe 200 to be enclosed, resulting in a flat bottom for easy placement on any surface. Additionally, in this embodiment, the heat conduction path of the heat dissipation structure 197 is from the heat generated by the operation of chips on the circuit board 1130 to the thermally conductive layer 1120, and then to the housing 1110, facilitating heat dissipation.

[0038] This application also provides an extracorporeal circulation system, including a pump and the aforementioned fixation device. The components of the fixation device and their connections are as described in the previous embodiment and will not be repeated here. In this extracorporeal circulation system, the pump is securely fixed and effectively dissipates heat. Furthermore, the pump can be quickly installed and removed with one hand, making operation convenient, and it also prevents accidental contact, thus preventing the pump from detaching from the fixation device.

[0039] It should be noted that in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] It should also be noted that the above description is only a description of the preferred embodiment of this utility model and is not intended to limit the scope of this utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure are within the protection scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixing device, characterized in that, include: The base, cover plate, ejector component, push-button component, and fixing component; the base has a first groove, and the side wall of the first groove has a through hole. The cover plate is detachably connected to the base, and the cover plate has a second through hole; the ejector component has a first protrusion, and the ejector component is elastically connected to the bottom of the first groove; the pusher component has a third through hole, the pusher component passes through the first through hole, and the first protrusion protrudes out of the third through hole; the pusher component moves axially along the first through hole, so that it can be detachably connected to the ejector component; the fixing member is disposed in the first groove; when the ejector component is in the initial position, the first protrusion extends out of the second through hole, and the ejector component abuts against the fixing member; when the ejector component is subjected to an external force and moves downward, the fixing member slides away from the side wall of the first groove until the ejector component and the fixing member are engaged.

2. The fixing device according to claim 1, characterized in that, It also includes a housing surrounding the outside of the base, with a vertically oriented receiving space between the housing and the base, and the cover plate located within the receiving space; and / or, The first through hole extends through the side wall near the cover plate, and the axial direction of the first through hole is perpendicular to the extending direction of the groove; and / or, the base is provided with a second groove, which is disposed opposite to the first through hole and located on both sides of the first groove.

3. The fixing device according to claim 1 or 2, characterized in that, It also includes a first elastic component, the two ends of which are respectively connected to the bottom of the first groove and the ejector component; the ejector component also includes a body, the first protrusion is provided on the body, one end of the body has a second protrusion, and the second protrusion is detachably connected to the pusher component.

4. The fixing device according to claim 3, characterized in that, It also includes an elastic clamping part, which is disposed on the pressing member, and the elastic clamping part is detachably connected to the second protrusion.

5. The fixing device according to claim 1 or 2, characterized in that, It also includes a second elastic component and a third elastic component. There are two fasteners. The two fasteners are connected to the sidewall of the first groove through the second elastic component and the third elastic component, respectively, and the two fasteners are arranged symmetrically.

6. The fixing device according to claim 5, characterized in that, The fixing member has a third protrusion, and the cover plate has a third groove. The third protrusion is adapted to the corresponding third groove, and the third protrusion can slide along the third groove.

7. The fixing device according to claim 2, characterized in that, It also includes a locking component and a limiting component. The locking component is slidably disposed on the housing, and the limiting component is disposed on the pressing component. When the locking component is in the first position, the locking component is engaged with the limiting component. When the locking component is in the second position, the locking component is disengaged from the limiting component.

8. The fixing device according to claim 1, characterized in that, It also includes a heat dissipation structure, which is mounted on the cover plate and is used to connect to the pump; the heat dissipation structure includes a housing, a thermally conductive layer and a circuit board, the thermally conductive layer is disposed inside the housing and the circuit board is disposed on the thermally conductive layer.

9. The fixing device according to claim 8, characterized in that, The housing has a cavity, and a protrusion is provided in the cavity. The heat-conducting layer is disposed on the protrusion and is adapted to the protrusion.

10. An extracorporeal circulation system, characterized in that, Includes the fixing device as described in any one of claims 1-9.

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