Blood pump with pump head that is easy to replace

Abstract

The utility model provides a kind of blood pump with pump head convenient to replace, and the blood pump includes pump head assembly, drive unit and fixed assembly;Pump head assembly includes pump shell, and the pump shell includes pump shell body and installation part;The side of installation part away from drive unit is provided with first clamping portion;Open is set in the limit slot of installation part with opening facing away from pump shell body;First clamping portion has first inclined plane, and one end of first inclined plane extends to installation part;Fixed assembly includes fixed ring;Second clamping portion is arranged on the inner circumferential surface of fixed ring;The clamping groove is formed between the lower end surface of second clamping portion and the upper end surface of drive unit;When pump head assembly is rotated relative to drive unit, the quick disassembly and installation of pump head assembly can be realized, and pump head assembly is replaced conveniently;Through the close cooperation of first inclined plane and the lower end surface of second clamping portion, the limit of pump head assembly circumferential and axial is realized, so that pump head assembly is stably installed on drive unit, and then the stable operation of blood pump is realized.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a blood pump with an easy-to-replace pump head. Background Technology

[0002] Blood pumps typically consist of a drive unit and a pump head. In actual use, the pump head comes into direct contact with blood and is usually disposable, requiring frequent replacement to avoid cross-infection and ensure safety. However, existing blood pump designs generally suffer from complex pump head installation and inconvenient disassembly, leading to time-consuming replacement processes, reduced efficiency, and potentially increased operator workload. Furthermore, there is a risk of improper pump head installation, misalignment, or even detachment during operation, affecting pumping performance and potentially posing safety hazards. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a blood pump with an easily replaceable pump head, comprising a pump head assembly, a drive unit, and a fixing assembly; The pump head assembly includes a pump housing, which includes a pump housing body and a mounting portion disposed on the circumferential surface of the pump housing body; a first snap-fit ​​portion is provided on the side of the mounting portion away from the drive unit; a limiting groove with an opening opposite to the pump housing body is provided on the mounting portion. The first snap-fit ​​portion has a first inclined surface, one end of which extends to the mounting portion; The fixing component includes a fixing ring; a second snap-fit ​​portion is provided on the inner circumferential surface of the fixing ring; a snap-fit ​​groove is formed between the lower end face of the second snap-fit ​​portion and the upper end face of the driving unit. When the pump head assembly rotates relative to the drive unit, the first locking part enters the locking groove from the side, and the circumferential and axial positioning of the pump head assembly is achieved through the tight fit between the first inclined surface and the lower end surface of the second locking part.

[0004] In some embodiments of this application, the lower end surface of the second snap-fit ​​portion is a second inclined surface, and the inclination direction of the second inclined surface is the same as the inclination direction of the first inclined surface.

[0005] In some embodiments of this application, there are multiple first snap-fit ​​portions; the multiple first snap-fit ​​portions are evenly distributed.

[0006] In some embodiments of this application, there are multiple second snap-fit ​​portions; the multiple second snap-fit ​​portions are evenly distributed.

[0007] In some embodiments of this application, the shape of the limiting groove is adapted to the shape of the second snap-fit ​​portion.

[0008] In some embodiments of this application, the fixing component further includes a limiting component; the limiting component is disposed on the fixing ring; one end of the limiting component can extend into the limiting groove to achieve circumferential limiting of the pump head.

[0009] In some embodiments of this application, the limiting component is a reset knob plunger.

[0010] In some embodiments of this application, the extending direction of the limiting component is set at an angle to the radial direction of the pump head.

[0011] In some embodiments of this application, the included angle is 10° to 30°.

[0012] In some embodiments of this application, a rotor is disposed inside the pump casing; under the drive of the drive unit, the rotor can rotate and suspend inside the pump casing.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: The blood pump with easy pump head replacement of this application includes a pump head assembly, a drive unit, and a fixing assembly; the pump head assembly includes a pump housing, which includes a pump housing body and a mounting portion disposed on the circumferential surface of the pump housing body; a first snap-fit ​​portion is provided on the side of the mounting portion away from the drive unit; a limiting groove with an opening opposite to the pump housing body is provided on the mounting portion; the first snap-fit ​​portion has a first inclined surface, one end of which extends to the mounting portion; the fixing assembly includes a fixing ring; a second snap-fit ​​portion is provided on the inner circumferential surface of the fixing ring; a snap-fit ​​groove is formed between the lower end face of the second snap-fit ​​portion and the upper end face of the drive unit; thus, when the pump head assembly rotates relative to the drive unit, the pump head assembly can be quickly disassembled and installed, facilitating the replacement of the pump head assembly; at the same time, through the tight fit of the first inclined surface and the lower end face of the second snap-fit ​​portion, the pump head assembly is limited in both the circumferential and axial directions, so that the pump head assembly is securely installed on the drive unit, thereby making the blood pump operate stably.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0015] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a blood pump with an easily replaceable pump head provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the structure of a pump head assembly provided in an exemplary embodiment of this application; Figure 3 This is a front view of a pump head assembly provided in an exemplary embodiment of this application; Figure 4 This is a front view of a blood pump with an easily replaceable pump head provided in an exemplary embodiment of this application; Figure 5 This is a partial cross-sectional view of a blood pump with an easily replaceable pump head provided in an exemplary embodiment of this application; Figure 6 This is the book Figure 5 Enlarged view at point B in the middle; Figure 7 This is a partial cross-sectional view of a blood pump with an easily replaceable pump head provided in an exemplary embodiment of this application; Figure 8 yes Figure 7 Enlarged view of point A in the middle; Figure 9 This is a partial cross-sectional view of a blood pump with an easily replaceable pump head provided in an exemplary embodiment of this application; Figure 10 This is a partial cross-sectional view of a blood pump with an easily replaceable pump head provided in an exemplary embodiment of this application.

[0016] In the picture: 10. Pump head assembly; 101. Pump housing body; 102. Mounting part; 103. First snap-fit ​​part; 104. First inclined surface; 105. Limiting groove; 20. Drive unit; 30. Fixing component; 31. Fixing ring; 311. Second snap-fit ​​part; 32. Limiting component. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0018] Blood pumps typically consist of a drive unit and a pump head. In actual use, the pump head comes into direct contact with blood and is usually disposable, requiring frequent replacement to avoid cross-infection and ensure safety. However, existing blood pump designs generally suffer from complex pump head installation and inconvenient disassembly, leading to time-consuming replacement processes, reduced efficiency, and potentially increased operator workload. Furthermore, there is a risk of improper pump head installation, misalignment, or even detachment during operation, affecting pumping performance and potentially posing safety hazards.

[0019] Based on this, an exemplary embodiment of this application provides a blood pump with an easily replaceable pump head. The blood pump includes a pump head assembly, a drive unit, and a fixing assembly. The pump head assembly includes a pump housing, which includes a pump housing body and a mounting portion disposed on the circumferential surface of the pump housing body. A first snap-fit ​​portion is provided on the side of the mounting portion away from the drive unit. A limiting groove with an opening opposite to the pump housing body is provided on the mounting portion. The first snap-fit ​​portion has a first inclined surface, one end of which extends to the mounting portion. The fixing assembly includes a fixing ring. A second snap-fit ​​portion is provided on the inner circumferential surface of the fixing ring. A snap-fit ​​groove is formed between the lower end face of the second snap-fit ​​portion and the upper end face of the drive unit. Thus, when the pump head assembly rotates relative to the drive unit, the pump head assembly can be quickly disassembled and installed, facilitating the replacement of the pump head assembly. At the same time, the tight fit between the first inclined surface and the lower end face of the second snap-fit ​​portion achieves circumferential and axial limiting of the pump head assembly, so that the pump head assembly is securely mounted on the drive unit, thereby making the blood pump operate stably.

[0020] Example 1: An exemplary embodiment of this application provides a blood pump with an easy-to-replace pump head, such as... Figure 1 and 4 As shown, the blood pump includes a pump head, a drive unit 20, and a fixing assembly 30; the pump head assembly 10 includes a pump housing, within which a rotor is disposed; the drive unit 20 can be an electric motor capable of generating electromagnetic force, allowing the rotor to rotate and levitate within the pump housing under the drive of the drive unit 20. Figure 2 and 3 As shown, the pump housing includes a pump housing body 101 and a mounting portion 102 disposed on the circumferential surface of the pump housing body 101. A first engaging portion 103 is disposed on the upper surface of the mounting portion 102 away from the drive unit 20. The first engaging portion 103 has a first inclined surface 104, one end of which extends to the mounting portion 102 and is smoothly connected to the mounting portion 102. A limiting groove 105 with an opening facing away from the pump housing body 101 is provided on the mounting portion 102 on the side where the first inclined surface 104 connects to the mounting portion 102. Preferably, in order to shorten the rotation stroke of the pump head assembly 10, the limiting groove 105 is disposed near the first inclined surface 104. The fixing component 30 includes a fixing ring 31, which includes a ring body and a boss on the upper part of the ring body. The boss has a first mounting hole extending vertically. The end face of the drive unit 20 has a first mounting hole that matches the position of the first mounting hole. Fasteners enter the first and second mounting holes from the top of the boss, thus connecting and fixing the fixing ring 31 and the drive unit 20. Figure 5 and 6As shown, a second snap-fit ​​portion 311 is provided on the inner circumferential surface of the boss; the second snap-fit ​​portion 311 protrudes from the inner circumferential surface of the boss, and a snap-fit ​​groove is formed between the lower end face of the second snap-fit ​​portion 311 and the upper end face of the drive unit 20; in order to facilitate installation, the cross-sectional dimension of the limiting groove 105 is larger than the cross-sectional dimension of the second snap-fit ​​portion 311.

[0021] When installing the pump head assembly 10, first fix the retaining ring 31 onto the drive unit 20; then align the limiting groove 105 on the pump head assembly 10 with the second snap-fit ​​portion 311 on the retaining ring 31, and insert the pump head assembly 10 into the drive unit 20; rotate the pump head assembly 10 from high to low in the direction of the first inclined surface 104. When the pump head assembly 10 rotates relative to the drive unit 20, the first snap-fit ​​portion 103 enters the snap-fit ​​groove from the side. Continue to rotate the pump head assembly 10. As the height of the first inclined surface 104 continuously increases, the first inclined surface 104 and the lower end face of the second snap-fit ​​portion 311 can be locked together, achieving a tight fit between the first inclined surface 104 and the lower end face of the second snap-fit ​​portion 311, thereby achieving circumferential and axial limiting of the pump head assembly 10. In this application, the first snap-fit ​​portion 103 rotates into the snap-fit ​​groove, which can achieve circumferential positioning of the pump head assembly 10; the tight fit between the first inclined surface 104 and the lower end surface of the second snap-fit ​​portion 311 can achieve axial and circumferential limiting of the pump head assembly 10. Thus, the pump head assembly 10 can be quickly disassembled and installed, making it easy to replace the pump head assembly 10; at the same time, the pump head assembly 10 is stably installed on the drive unit 20, thereby making the blood pump operate stably.

[0022] For example, there are multiple first latching portions 103; the multiple first latching portions 103 are evenly distributed. There are multiple second latching portions 311; the multiple second latching portions 311 are evenly distributed. The number and position of the first latching portions 103 are adapted to the number and position of the second latching portions 311. Preferably, there are four first latching portions 103, four limiting grooves 105, and four second latching portions 311, and the four first latching portions 103, four limiting grooves 105, and four second latching portions 311 are evenly distributed along the circumferential direction.

[0023] Preferably, the shape of the limiting groove 105 is adapted to the shape of the second engaging portion 311, so that the second engaging portion 311 can be inserted into the limiting groove 105. For example, the cross-sectional shape of the limiting groove 105 is semi-circular, and the cross-sectional shape of the second engaging portion 311 is semi-circular.

[0024] To further secure the pump head assembly 10 and improve the operational stability of the blood pump, the fixing assembly 30 also includes a limiting assembly 32. The limiting assembly 32 is disposed on the fixing ring 31, and its extension direction is directed toward the pump head assembly 10. Preferably, the limiting assembly 32 is a reset knob plunger. Pulling the end away from the pump head assembly 10 causes the end near the pump head assembly 10 to retract away from the pump head assembly 10, and then automatically spring back to its reset position. Thus, when installing the pump head assembly 10, after inserting the pump head assembly 10 into the drive unit 20, the end of the limiting assembly 32 away from the pump head assembly 10 can be pulled, causing the pump head assembly 10 to fall to the end face close to the drive unit 20. Then, the limiting assembly 32 can be released to reset it, and the end near the pump head assembly 10 can extend into the limiting groove 105 to achieve circumferential limiting of the pump head.

[0025] For example, such as Figure 9 and 10 As shown, the extension direction of the limiting component 32 is set at an angle to the radial direction of the pump head, preferably 10° to 30°; thus, the limiting component 32 can simultaneously limit the radial and tangential directions of the pump head assembly 10, and has the functions of radially pressing the pump head assembly 10 and circumferentially tightening the pump head assembly 10, so as to make the pump head assembly 10 more stable.

[0026] Example 2: Based on the above embodiment 1, the difference between this embodiment and embodiment 1 is that, as follows: Figure 7 and 8 As shown, the lower end face of the second snap-fit ​​portion 311 is a second inclined surface, and the inclination direction of the second inclined surface is the same as that of the first inclined surface 104. In this way, the contact area between the first inclined surface 104 and the second inclined surface can be increased, avoiding local stress on the first inclined surface 104, and improving the snap-fit ​​stability between the two, so that the pump head assembly 10 is firmly installed on the drive unit 20.

[0027] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0028] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0029] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. A blood pump with an easily replaceable pump head, characterized in that, Includes pump head assembly, drive unit, and mounting components; The pump head assembly includes a pump housing, which includes a pump housing body and a mounting portion disposed on the circumferential surface of the pump housing body; a first snap-fit ​​portion is provided on the side of the mounting portion away from the drive unit; a limiting groove with an opening opposite to the pump housing body is provided on the mounting portion. The first snap-fit ​​portion has a first inclined surface, one end of which extends to the mounting portion; The fixing component includes a fixing ring; a second snap-fit ​​portion is provided on the inner circumferential surface of the fixing ring; a snap-fit ​​groove is formed between the lower end face of the second snap-fit ​​portion and the upper end face of the driving unit. When the pump head assembly rotates relative to the drive unit, the first locking part enters the locking groove from the side, and the circumferential and axial positioning of the pump head assembly is achieved through the tight fit between the first inclined surface and the lower end surface of the second locking part.

2. The blood pump with an easily replaceable pump head according to claim 1, characterized in that, The lower end face of the second snap-fit ​​portion is a second inclined surface, and the inclination direction of the second inclined surface is the same as that of the first inclined surface.

3. The blood pump with an easily replaceable pump head according to claim 1 or 2, characterized in that, There are multiple first snap-fit ​​parts; the multiple first snap-fit ​​parts are evenly distributed.

4. The blood pump with an easily replaceable pump head according to claim 1, characterized in that, There are multiple second snap-fit ​​parts; the multiple second snap-fit ​​parts are evenly distributed.

5. The blood pump with an easily replaceable pump head according to claim 1, characterized in that, The shape of the limiting groove is adapted to the shape of the second snap-fit ​​part.

6. The blood pump with an easily replaceable pump head according to claim 1, characterized in that, The fixing component also includes a limiting component; the limiting component is disposed on the fixing ring; one end of the limiting component can extend into the limiting groove to achieve circumferential limiting of the pump head.

7. The blood pump with an easily replaceable pump head according to claim 6, characterized in that, The limiting component is a reset knob plunger.

8. The blood pump with an easily replaceable pump head according to claim 6, characterized in that, The extension direction of the limiting component is set at an angle to the radial direction of the pump head.

9. The blood pump with an easily replaceable pump head according to claim 8, characterized in that, The included angle is between 10° and 30°.

10. The blood pump with an easily replaceable pump head according to claim 1, characterized in that, A rotor is installed inside the pump casing; driven by the drive unit, the rotor can rotate and suspend inside the pump casing.

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