Quantitative suction tube with adjustable suction amount

Abstract

The quantitative suction tube comprises a suction tube main body, an extension component and an excessive overflow component, wherein the extension component is arranged at the lower end of the suction tube main body and is used for extending a liquid suction end; the excessive overflow component is arranged on the side edge of the suction tube main body and is used for limiting the suction volume; the suction tube main body comprises a rubber suction bag at the top, a tube body connected to the lower end of the rubber suction bag through a connecting part, and a liquid storage suction head arranged at the lower end of the tube body; the excessive overflow assembly comprises an overflow pipe connected to the side wall of the pipe body and a plastic pipe connected to the lower portion of the overflow pipe. By means of the threaded connection mode, detachable connection of the liquid storage suction head is achieved, when the liquid suction amount needs to be changed, the liquid storage suction head with the corresponding capacity can be selected for replacement, and the technical problem that in a traditional method, due to the fact that the suction amount can not be adjusted, a whole suction pipe with different suction amounts needs to be replaced, and the application cost is increased is solved.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of straw technology, and more specifically, relate to a metering straw with adjustable suction volume. Background Technology

[0002] In the field of in vitro diagnostic analysis in medicine, it is often necessary to quantitatively add samples to analytical devices for detection and analysis. This quantitative pipetting operation is a step that needs to be performed constantly in all physical, chemical, and biological laboratories and in the medical industry. Currently, for the aspiration of quantitative liquids, especially in medicine, the main methods are pipettes or quantitative sampling tubes. However, pipettes are cumbersome to operate, requiring the replacement of pipette tips for different volumes, and are costly. Quantitative sampling tubes are disposable pipettes that use rubber tips for aspiration; these are time-consuming, inefficient, and inaccurate, and are also prone to over-absorption, drawing liquid into the rubber tip. Therefore, proposing a pipette with superior quantitative performance is of great significance for improving the efficiency and quality of quantitative operations.

[0003] To address the aforementioned technical problems, Chinese invention patent CN115007238A discloses a quantitative pipette, comprising a top air bladder, a connecting tube, an overflow storage tube, and a suction tube. This invention designs the upper and lower ends of the suction tube as conical structures, with the upper end having a conical inner cavity that is smaller at the top and larger at the bottom, and the lower end having a conical inner cavity that is larger at the top and smaller at the bottom. This significantly reduces the diameter of the openings at both ends of the suction tube, thereby reducing the interaction force between the liquid and solid at both ends, greatly minimizing the volume of the liquid's concave or convex shape, significantly improving collection accuracy, and making it easier to squeeze out with minimal residue. Furthermore, Chinese utility model patent CN204768780U discloses a quantitative pipette, relating to the field of medical devices, comprising a liquid conduit, two reservoirs, and a suction bag. The suction bag is connected to the two reservoirs via two gas conduits, and the liquid conduit, the thin tube, and the two reservoirs are interconnected via two lower liquid tubes. In use, pick up the quantitative pipette, squeeze the aspiration bag, immerse the pipette tip into the liquid sample, and slowly release the aspiration bag to allow the liquid sample to fill the liquid delivery tube. Excess liquid flows down through the lower openings of the two dispensing tubes and is stored in the two reservoir bags. Then, squeeze the aspiration bag to expel the liquid into the corresponding detection area for detection. This utility model is ingeniously designed, simple in structure, easy to operate, and provides accurate quantification, making it suitable for quantitative transfer of liquids.

[0004] The above-mentioned patented technologies have all achieved quantitative aspiration by improving the structure of the pipette body, but the following technical problems still exist: (1) Although quantitative aspiration can be achieved, as the aspiration volume requirement changes, since it does not have an adjustable aspiration volume function, it is necessary to replace the entire pipette with different aspiration volumes, which increases the application cost; (2) Since the liquid storage part in the above-mentioned patented technologies is connected to the aspiration bag and is in a closed state, it is easy to cause the solution to be drawn into the aspiration bag, thus there is a technical problem of corrosion of the aspiration bag; (3) In special application scenarios, after the pipette is used for filling, there is a need for micro-replenishment of the liquid, but the above-mentioned patented technologies have not disclosed this technical solution. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides an adjustable-volume metering pipette. By employing a threaded connection, the liquid storage tip can be detachably connected. When it is necessary to change the liquid volume, a liquid storage tip of the corresponding capacity can be selected for replacement. This solves the technical problem of traditional methods, which, due to the lack of adjustable volume functionality, require replacing the entire pipette with one of different volumes, thus increasing application costs.

[0006] To achieve the above objectives, a volume-adjustable metering pipette includes:

[0007] The straw body, the extension assembly installed at the lower end of the straw body for extending the liquid suction end, and the excess overflow assembly provided on the side of the straw body for limiting the suction volume;

[0008] The main body of the straw includes a rubber bladder at the top, a tube body connected to the lower end of the rubber bladder via a connecting part, and a liquid storage tip disposed at the lower end of the tube body;

[0009] The excess overflow assembly includes an overflow pipe connected to the side wall of the pipe body and a plastic pipe connected below the overflow pipe;

[0010] By squeezing the rubber suction bag, the liquid to be sucked enters the liquid storage head and tube body, and the excess liquid flows out from the overflow pipe opening set at a fixed height position on the side of the tube body and is discharged back to the liquid container.

[0011] Preferably, the liquid storage pipette tip and the tube body are detachably connected via a first mounting assembly.

[0012] Preferably, the first mounting component includes:

[0013] External and internal threads are respectively provided at the lower port of the tube body and the upper port of the liquid storage suction head, and an assembly buffer layer is provided on the upper surface of the upper port of the liquid storage suction head; the internal thread and the external thread are detachably connected by threads.

[0014] Preferably, the assembly buffer layer is made of rubber.

[0015] Preferably, the tube body includes a first measuring line disposed on its side wall.

[0016] Preferably, the extension component includes:

[0017] An extension tube, an inner rubber layer and an outer rubber layer respectively located at the top port of the extension tube and the bottom port of the liquid storage nozzle;

[0018] The friction between the inner and outer rubber layers maintains a detachable, sealed connection.

[0019] Preferably, the excess overflow component further includes:

[0020] An overflow container is provided between the overflow pipe and the plastic tube for storing overflow, a second measuring line is provided on the surface of the overflow container, and a clamp is provided for controlling the on / off state of the plastic tube.

[0021] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0022] (1) The present invention provides a quantitative pipette with adjustable suction volume. By adopting a threaded connection, the liquid storage pipette head can be detached. When it is necessary to change the suction volume, the corresponding liquid storage pipette head can be selected for replacement. This solves the technical problem in the traditional method that the pipette with different suction volume needs to be replaced due to the lack of adjustable suction volume function, which increases the application cost.

[0023] (2) The present invention provides a quantitative pipette with adjustable suction volume. By adding an excess overflow component on the side wall of the pipette body, when the liquid is sucked in and the liquid level rises to the overflow pipe opening, the excess liquid sucked in afterward will overflow through the component, ensuring that the liquid storage volume inside the pipette body and the liquid storage head is the quantitative requirement value. At the same time, it solves the technical problem in the prior art that the solution is easily sucked into the suction bag, thus causing the suction bag to be corroded. Furthermore, by setting an overflow container and clamping component, the technical effect of micro-volume replenishment of liquid is achieved. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an adjustable-volume metering pipette according to an embodiment of the present invention;

[0025] Figure 2 A partial enlarged view A shows an embodiment of the present invention: an adjustable-volume metering pipette.

[0026] Figure 3 This is an enlarged view of the main body of a metering straw with adjustable suction volume according to an embodiment of the present invention;

[0027] Figure 4This is an enlarged view of the liquid storage tip of an adjustable volume metering pipette according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the extension component structure of an adjustable metering pipette according to an embodiment of the present invention;

[0029] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-pissor body, 101-rubber aspirator, 102-connector, 103-tube body, 104-liquid storage tip, 105-first measuring line, 110-first mounting assembly, 111-external thread, 112-bevel, 113-internal thread, 114-assembly buffer layer, 2-extension assembly, 200-extension tube, 210-second mounting assembly, 211-inner rubber layer, 212-outer rubber layer, 3-overflow assembly, 301-overflow tube, 302-overflow container, 303-second measuring line, 304-plastic tube, 305-clamp, 306-overflow bevel. Detailed Implementation

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figures 1-5 As shown in this embodiment of the invention, the adjustable-volume metering pipette includes:

[0035] The straw body 1, the extension component 2 installed at the lower end of the straw body 1 for extending the liquid suction end, and the excess overflow component 3 provided on the side of the straw body 1 for limiting the suction volume;

[0036] The straw body 1 includes a rubber suction bag 101 at the top, a tube body 103 connected to the lower end of the rubber suction bag 101 via a connecting part 102, and a liquid storage suction head 104 disposed at the lower end of the tube body 103.

[0037] The excess overflow assembly 3 includes an overflow pipe 301 connected to the side wall of the pipe body 103 and a plastic pipe 304 connected below the overflow pipe 301.

[0038] By squeezing the rubber suction bag 101, the liquid to be sucked enters the liquid storage suction head 104 and the tube body 103. Excess liquid flows out from the overflow pipe 301 located at a fixed height on the side of the tube body 103 and is discharged back to the liquid container.

[0039] like Figure 1 , Figure 3 and Figure 4 As shown in this embodiment of the present invention, the liquid storage suction head 104 and the tube body 103 are detachably connected by the first mounting assembly 110.

[0040] like Figure 1 , Figure 3 and Figure 4 As shown in this embodiment of the present invention, the first mounting component 110 includes:

[0041] An external thread 111 and an internal thread 113 are respectively provided at the lower port of the tube body 103 and the upper port of the liquid storage suction head 104, and an assembly buffer layer 114 is provided on the upper surface of the upper port of the liquid storage suction head 104; the internal thread 113 and the external thread 111 are connected by a threaded detachable connection.

[0042] like Figure 1 , Figure 3 and Figure 4As shown in this embodiment of the present invention, the assembly buffer layer 114 is made of rubber.

[0043] like Figure 1 As shown in this embodiment of the utility model, the tube body 103 includes a first measuring line 105 disposed on its side wall.

[0044] like Figure 1 and 5 As shown, in this embodiment of the present invention, the extension component 2 includes:

[0045] Extension tube 200, inner rubber layer 211 and outer rubber layer 212 respectively provided at the top port of the extension tube 200 and the bottom port of the liquid storage suction head 104;

[0046] The friction between the inner rubber layer 211 and the outer rubber layer 212 is used to maintain a detachable and sealed connection.

[0047] like Figure 1 and Figure 2 As shown in this embodiment of the invention, the excess overflow component 3 further includes:

[0048] An overflow container 302 for storing overflow is provided between the overflow pipe 301 and the plastic pipe 304; a second measuring line 303 is provided on the surface of the overflow container 302; and a clamp 305 for controlling the on / off state of the plastic pipe 304.

[0049] The working principle of this utility model is as follows: First, determine whether it is necessary to add an extension component based on the container being aspirated to facilitate internal aspiration, and replace the storage pipette 104 with one of the corresponding capacity according to the aspiration volume requirements; then, manually align the opening of the plastic tube 304 with the container being aspirated to facilitate the return of the aspirated liquid; next, by squeezing the rubber aspiration bladder 101, the aspirated liquid enters the storage pipette 104 and the tube body 103, and excess liquid flows out from the overflow pipe 301 located at a fixed height on the side of the tube body 103 and enters the overflow container 302. After aspiration is completed, if a small amount of aspirated liquid needs to be added during the solution dispensing process, the liquid in the overflow container 302 can be added as supplementary liquid by opening the clamp 305; if no supplementation is required, the clamp 305 can be kept open during the solution aspiration process to allow the aspirated liquid to be discharged back into its storage container.

[0050] In this embodiment of the utility model, a threaded connection is used to achieve a detachable connection of the liquid storage pipette tip. When it is necessary to change the liquid volume, a liquid storage pipette tip of the corresponding capacity can be selected for replacement. This solves the technical problem in the traditional method where the lack of adjustable liquid volume function leads to the need to replace the entire pipette with a different liquid volume, resulting in increased application costs.

[0051] Furthermore, by adding an excess overflow component to the side wall of the tube, when liquid is drawn in and the liquid level rises to the overflow pipe opening, any excess liquid drawn in afterward will overflow through this component, ensuring that the liquid volume inside the tube and the liquid storage head is the required quantitative value. At the same time, it solves the technical problem in the prior art that the solution is easily drawn into the suction bag, thus causing corrosion of the suction bag. Moreover, by setting an overflow container and clamping assembly, the technical effect of micro-volume replenishment of liquid is achieved.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A metering pipette with adjustable suction volume, characterized in that, include: The straw body (1), the extension assembly (2) installed at the lower end of the straw body (1) for extending the liquid suction end, and the excess overflow assembly (3) provided on the side of the straw body (1) for limiting the amount of liquid inhaled; The main body of the straw (1) includes a rubber suction bag (101) at the top, a tube body (103) connected to the lower end of the rubber suction bag (101) via a connecting part (102), and a liquid storage tip (104) disposed at the lower end of the tube body (103). The excess overflow assembly (3) includes an overflow pipe (301) connected to the side wall of the pipe body (103) and a plastic pipe (304) connected below the overflow pipe (301). By squeezing the rubber suction bag (101), the liquid to be sucked enters the liquid storage suction head (104) and the tube body (103). Excess liquid flows out from the outlet of the overflow pipe (301) set at a fixed height position on the side of the tube body (103) and is discharged back to the liquid container.

2. The adjustable-volume metering pipette according to claim 1, characterized in that, The liquid storage pipette tip (104) and the tube body (103) are detachably connected via the first mounting assembly (110).

3. The adjustable-volume metering pipette according to claim 2, characterized in that, The first installation component (110) includes: External thread (111) and internal thread (113) are respectively provided at the lower port of the tube body (103) and the upper port of the liquid storage suction head (104), and an assembly buffer layer (114) is provided on the upper surface of the upper port of the liquid storage suction head (104); the internal thread (113) and the external thread (111) are connected by a threaded detachable connection.

4. The adjustable-volume metering pipette according to claim 3, characterized in that, The assembly buffer layer (114) is made of rubber.

5. A metering pipette with adjustable suction volume according to claim 4, characterized in that, The tube body (103) includes a first measuring line (105) disposed on its side wall.

6. The adjustable-volume metering pipette according to claim 1, characterized in that, The extension component (2) includes: Extension tube (200), inner rubber layer (211) and outer rubber layer (212) respectively provided at the top port of the extension tube (200) and the bottom port of the liquid storage nozzle (104); The friction between the inner rubber layer (211) and the outer rubber layer (212) is used to maintain a detachable sealed connection.

7. A volume-adjustable metering pipette according to any one of claims 1 to 6, characterized in that, The excess overflow component (3) further includes: An overflow container (302) for storing overflow is provided between the overflow pipe (301) and the plastic pipe (304), a second measuring line (303) is provided on the surface of the overflow container (302), and a clamp (305) for controlling the on / off state of the plastic pipe (304).

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