Lengthened gun head capable of stringing and sleeving pipettor

Abstract

A pipette head body comprises a pipette action area, a pipette transition area, a liquid storage area, a stringing area and a suction nozzle area from top to bottom, frosted annular connecting grooves are formed in the inner sides of the pipette action area and the pipette transition area of the pipette head, two elastic annular connecting protrusions are arranged on the outer side of the stringing area, and the two elastic annular connecting protrusions are connected with the pipette action area and the liquid storage area. The pipette head connecting device is simple in structure and convenient to use, realizes serial sleeve connection between pipette heads of different specifications, prolongs the length of the pipette head, improves the pipetting precision, is used for pipetting operation of deep-cavity container pipetting in a laboratory, and effectively prevents the problem of microbiological contamination. The utility model has the advantages of simple structure, stable joint, good air tightness and convenience in use.

Description

Technical Field

[0001] This utility model relates to the technical field of pipette tip devices, and in particular to an extended pipette tip that can be nested together. Background Technology

[0002] A pipette, also known as a pipette tip, is commonly used in biological and chemical research experiments for the quantitative transfer of liquids and is one of the most frequently used consumables in laboratories. Correspondingly, the pipette tip is called a pipette tip, and different sizes of tips are used with different pipette capacities. Common pipette tip sizes include 10ul, 200ul, and 1ml; their overall structure is relatively short, and their length is fixed and cannot be extended. In routine microbiological experiments such as strain culture, protein expression, and fermentation, deep-cavity containers such as test tubes and Erlenmeyer flasks are often used. When transferring bacterial solutions from test tubes or Erlenmeyer flasks, due to the length limitation of the pipette tip, it is often necessary to tilt the test tube or Erlenmeyer flask to a certain extent so that the pipette tip can contact and aspirate the bacterial solution before fully entering the container. This operation increases the risk of bacterial contamination. To mitigate the risk of contamination, pipette tips of the same or different specifications are often nested together to extend tip length or improve pipetting accuracy. However, this method suffers from problems such as unstable connections, poor airtightness, and limited length extension. Therefore, there is an urgent need to develop a pipette tip suitable for pipetting in deep-cavity containers. Summary of the Invention

[0003] To address the above problems, the purpose of this invention is to provide a pipette tip that can be strung together for extended length. The pipette tip of this invention has a simple structure and good airtightness at the connection. When it is necessary to increase the length of the pipette tip, pipette tips of the same specification can be strung together, mainly for experimental operations such as pipetting from deep-cavity containers, effectively avoiding bacterial contamination. When it is necessary to improve pipetting accuracy, smaller pipette tips can also be strung together.

[0004] This invention provides a pipette tip that can be chained together, characterized in that: it is an integrated pipette tip composed of a pipette action area and transition area (1), a liquid storage area (2), a chaining area (3), and a nozzle area (4) from top to bottom; the pipette action area and transition area are tapered structures from top to bottom, and an annular connecting groove is provided on their inner side; the liquid storage area is a cylindrical structure; the chaining area is a truncated cone structure with a diameter that gradually decreases from top to bottom, and an upper annular connecting protrusion and a lower annular connecting protrusion are respectively provided on its outer side.

[0005] Furthermore, the taper angle between the pipette's action area and transition area is smaller than the taper angle of the pipette tip sleeve area of ​​the same specification.

[0006] Furthermore, the inner diameter of the liquid storage area is smaller than the overall inner diameter of the pipette action area and the transition area.

[0007] Furthermore, the outer diameter of the liquid storage area is smaller than the inner diameter of the pipette action area and transition area above the annular connecting groove.

[0008] Furthermore, the tapering angle of the sleeved area is smaller than the tapering angle between the action area and the transition area of ​​the smaller pipette tip.

[0009] Furthermore, the outer diameter of the sleeved area is smaller than the inner diameter of the pipette action area and transition area above the annular connecting groove of the smaller pipette tip.

[0010] Furthermore, the annular connecting groove has a frosted surface and a sloped trapezoidal structure, which is adapted to the upper annular connecting protrusion.

[0011] Furthermore, the annular connecting protrusion is made of an elastic material and has a sloped trapezoidal structure.

[0012] Furthermore, the upper annular connecting protrusion is larger than the lower annular connecting protrusion.

[0013] Furthermore, the upper annular connecting protrusion is adapted to the annular connecting groove of the same specification gun head.

[0014] Furthermore, the lower annular connecting protrusion is adapted to the annular connecting groove of a smaller-sized gun head.

[0015] Furthermore, the gun head body is made of plastic.

[0016] Furthermore, the gun head body is a polypropylene gun head.

[0017] Furthermore, the pipette's action area, transition area, reservoir area, sleeve area, and tip area are coaxially arranged.

[0018] The beneficial effects of this utility model are as follows: When it is necessary to increase the length of the pipette tip, the annular connecting protrusion of the pipette tip's connecting area is inserted into the annular connecting groove between the pipette's action area and transition area of ​​another pipette tip of the same specification until they fit together, thereby realizing the connection between the pipette tips, thus increasing the tip length and enabling pipetting in deep-cavity containers; at the same time, smaller pipette tips can also be used in series, thereby improving pipetting accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the extended pipette tip structure of the device of this utility model.

[0020] Figure 2 This is a schematic diagram of the connection structure between the extended pipette tip of this utility model device and the extended pipette tip of the same specification.

[0021] Figure 3 This is a schematic diagram of a smaller version of the extended pipette tip structure of the device of this utility model.

[0022] Figure 4 This is a schematic diagram of the connection structure between a smaller-sized, interlocking extended pipette tip and a similar-sized interlocking extended pipette tip in the device of this utility model.

[0023] Figure 5 This is a schematic diagram of the connection structure between the extended pipette tip and the smaller extended pipette tip of the present invention.

[0024] In the diagram: 1-Pipette action area and transition area; 2-Liquid storage area; 3-Cast-in area; 4-Nipple area; 5-Annular connecting groove; 6-Upper annular connecting protrusion; 7-Lower annular connecting protrusion. Detailed Implementation

[0025] The objective of this utility model is achieved through the following technical solution:

[0026] The present invention will now be described in detail with reference to the accompanying drawings and examples.

[0027] like Figure 1 As shown in this example, a chainable extended pipette tip includes a pipette action area and transition area 1, a reservoir area 2, a chainable area 3, and a tip area 4. The pipette action area and transition area of ​​the chainable extended pipette tip have a tapering structure from top to bottom, with a tapering angle smaller than the tapering angle of the chainable area of ​​a pipette tip of the same specification. An annular connecting groove is provided on its inner surface for chainable connection with another pipette tip of the same specification. The chainable extended pipette tip has a cone-shaped structure with a gradually decreasing diameter from top to bottom, with a tapering angle smaller than the tapering angle of the action area and transition area of ​​a smaller pipette tip. An annular connecting protrusion at the upper end and an annular protrusion at the lower end are respectively provided on its outer surface. The connecting protrusion has an upper annular connecting protrusion for connecting with an annular connecting groove of the same specification pipette tip, and a lower annular connecting protrusion for connecting with an annular connecting groove of a smaller specification pipette tip. The inner diameter of the liquid storage area is smaller than the overall inner diameter of the pipette action area and transition area, and the outer diameter is smaller than the inner diameter of the pipette action area and transition area above the annular connecting groove, so as to facilitate the insertion of the same specification pipette tip. The outer diameter of the sleeve area is smaller than the inner diameter of the pipette action area and transition area above the smaller specification annular connecting groove, so as to facilitate the insertion of the smaller specification pipette tip.

[0028] The annular connecting groove has a frosted surface, while the annular connecting protrusion is made of an elastic material, which increases friction, stabilizes the connection, and increases airtightness.

[0029] A corner is provided at the junction of the pipette's action area, transition area, and storage area to facilitate the placement of the pipette tip in the tip box.

[0030] The method of using this invention is as follows: After sterilizing the pipette tip in the tip box, use it. When it is necessary to increase the length of the pipette tip or the pipetting accuracy, gradually insert the annular connecting protrusion of the pipette tip stringing area into the annular connecting groove between the pipette tip's working area and the transition area of ​​another pipette tip of the same or smaller specification, thereby achieving a tight connection between the pipette tips. Repeat the connection until the required pipette tip length is reached, and then perform pipetting operations on the liquid in the deep cavity container. This pipette tip lengthening design can easily solve the problem of liquid transfer in deep cavity containers, effectively avoid the problem of bacterial contamination, and improve the pipetting accuracy.

[0031] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit this utility model. Those skilled in the art can make other variations or modifications based on the above description. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A pipette tip that can be nested together, characterized in that: It is an integrated pipette tip consisting of a pipette action area and transition area (1), a liquid storage area (2), a connecting area (3) and a nozzle area (4) from top to bottom; the pipette action area and transition area are a tapered structure from top to bottom, and an annular connecting groove is provided on its inner side; the liquid storage area is a cylindrical structure; the connecting area is a cone-shaped structure with a diameter that gradually decreases from top to bottom, and an upper annular connecting protrusion and a lower annular connecting protrusion are provided on its outer side.

2. The extendable pipette tip according to claim 1, characterized in that: The taper angle between the action zone and the transition zone of the pipette is smaller than the taper angle of the pipette tip sleeve zone of the same specification.

3. The extendable pipette tip according to claim 1, characterized in that: The inner diameter of the liquid storage area is smaller than the overall inner diameter of the pipette action area and transition area.

4. The extendable pipette tip according to claim 1, characterized in that: The outer diameter of the liquid storage area is smaller than the inner diameter of the pipette action area and transition area above the annular connecting groove.

5. The extendable pipette tip according to claim 1, characterized in that: The tapering angle of the sleeved area is less than the tapering angle between the action area and the transition area of ​​the smaller pipette tip.

6. The extendable pipette tip according to claim 1, characterized in that: The outer diameter of the sleeved area is smaller than the inner diameter of the pipette tip action area and transition area above the annular connecting groove of a smaller specification.

7. The extendable pipette tip according to claim 1, characterized in that: The annular connecting groove has a frosted surface and a sloped trapezoidal structure, which is adapted to the upper annular connecting protrusion.

8. The extendable pipette tip according to claim 1, characterized in that: The annular connecting protrusion is made of an elastic material and has a sloped trapezoidal structure.

9. The extendable pipette tip according to claim 1, characterized in that: The upper annular connecting protrusion is larger than the lower annular connecting protrusion.

10. A pipette tip with a cascading extension as described in claim 9, characterized in that: The upper annular connecting protrusion is adapted to the annular connecting groove of the same specification gun head.

11. The extendable pipette tip according to claim 9, characterized in that: The lower annular connecting protrusion is adapted to the annular connecting groove of a smaller-sized gun head.

12. The extendable pipette tip according to claim 1, characterized in that: The gun head itself is made of plastic.

13. The extendable pipette tip according to claim 1, characterized in that: The nozzle body is made of polypropylene.

14. The extendable pipette tip according to claim 1, characterized in that: The pipette's action area, transition area, reservoir area, sleeve area, and tip area are coaxially arranged.

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