Segmented lengthened pipette tip

Abstract

The utility model relates to the technical field of pipette tip manufacturing, in particular to a sectional lengthened pipette tip. Comprising a front section body and a rear section body, a suction head tip and a front tube body are integrally arranged on the front section body, a rear tube body is arranged on the rear section body, the end parts of the front tube body and the rear tube body are in ultrasonic welding connection, and the suction head tip is arranged at one end, far away from the rear tube body, of the front tube body; one end, far away from the front tube body, of the rear tube body is connected with an adapter, and the adapter comprises a tubular plug matched with the pipettor; the front section body, the rear section body and the adapter are provided with axially-penetrating and connected fluid through cavities, and the fluid through cavities comprise a fluid through cavity corresponding to the tip of the suction head, a first fluid storage cavity corresponding to the front pipe body, a second fluid storage cavity corresponding to the rear pipe body and a flow channel through cavity corresponding to the adapter. The shape and size precision of the pipette tip can be ensured, and the manufacturing cost of the pipette tip mold is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipette tip manufacturing, in particular to a segmented and lengthened pipette tip. Background Art

[0002] Pipette tips are commonly used tools in laboratories to accurately and efficiently distribute and transfer liquids in experiments, especially in micro-experiments that require high precision and repeatability. By using pipette tips, experimenters can quickly and accurately transfer liquids, avoid cross-contamination, and ensure the accuracy of experimental results. The design and material of pipette tips are optimized to ensure that there is no adsorption, volatilization or residue, thereby ensuring the reliability of experimental results.

[0003] The injection molding manufacturing process is used in the pipette tip. The length of the conventional pipette tip is: A-Bmm, and it is manufactured by one-piece injection molding using a 180T injection molding machine. When the length of the pipette tip is extended due to customization requirements and exceeds Cmm, the 180T injection molding machine cannot adapt to the manufacturing of pipette tips with such parameters. When the extended pipette tip is injected in one piece, the depth of the corresponding mold core needs to be lengthened, which makes it difficult to ensure the uniformity of temperature, affecting the shape and dimensional accuracy of the tip molding, especially the verticality. Utility Model Content

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a segmented extended pipette tip, which is suitable for the situation where the length of the pipette tip is extended to be incompatible with the injection molding machine, can ensure the accuracy of the shape and size of the pipette tip, and save the manufacturing cost of the pipette tip mold.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A segmented elongated pipette tip, comprising a front section and a rear section; the front section is integrally provided with a tip tip and a front tube body, the rear section is provided with a rear tube body, the ends of the front tube body and the rear tube body are connected by ultrasonic welding, and the tip tip is arranged at an end of the front tube body away from the rear tube body;

[0007] The end of the rear tube body away from the front tube body is connected with an adapter head, the adapter head includes a tubular plug head adapted to the pipette, and the end of the tubular plug head close to the rear tube body is provided with a radially outwardly extending annular connecting plate, and the annular connecting plate is sealed and connected to the end of the rear tube body;

[0008] The front section body, the rear section body and the adapter are provided with an axially penetrating and connected fluid through cavity, and the fluid through cavity includes: a liquid through cavity corresponding to the tip of the suction head, a first liquid storage cavity corresponding to the front tube body, a second liquid storage cavity corresponding to the rear tube body and a flow channel cavity corresponding to the adapter.

[0009] Based on the above structure, the principle of the segmented elongated pipette tip is as follows: the adapter head is connected to the external pipette through the tubular plug head, and the flow channel cavity is connected to the pipette. When performing a pipetting operation, the tip of the pipette tip is placed in the liquid storage container, the pipette works to perform liquid extraction, and the liquid in the container is sucked from the liquid passage cavity into the first liquid storage cavity and the second liquid storage cavity, wherein the first liquid storage cavity and the second liquid storage cavity are used to store liquid; when performing a liquid discharge operation, the tip of the pipette tip is aligned with the target container, the pipette works to perform liquid discharge, and the liquid stored in the first liquid storage cavity and the second liquid storage cavity is discharged from the liquid passage cavity into the target container.

[0010] The present application adopts the front and rear sections of the pipette tip that are molded by segmented injection molding. Compared with the pipette tip that is directly molded by one-piece injection molding, it is suitable for the situation where the length of the pipette tip is extended to one-piece injection molding and is not compatible with the general injection molding machine. Therefore, a segmented and lengthened pipette tip in the present application can adapt to the molding and manufacturing of long-sized pipette tips, and ensure the accuracy of the shape and size of the pipette tip, saving the manufacturing cost of the pipette head mold. In addition, the segmented manufacturing of the adapter head can imitate the shape of the tubular plug according to the connecting end of different pipettes, so it can flexibly match different models of pipettes.

[0011] Furthermore, in a segmented elongated pipette tip in the present application, a positioning plug tube is extended from one end of the annular connecting plate, and the positioning plug tube is arranged in the tube cavity of the rear tube body.

[0012] Furthermore, in a segmented elongated pipette tip in the present application, the radial dimension of the liquid passage cavity is smaller than the radial dimension of the first liquid storage cavity, and the radial dimension of the flow channel cavity is smaller than the radial dimension of the second liquid storage cavity.

[0013] Furthermore, a segmented elongated pipette tip in the present application also includes a first annular protrusion and a first annular groove adapted to the first annular protrusion, wherein the first annular protrusion and the first annular groove are respectively provided on the end faces on both sides between the front tube body and the tip tip. As a preferred embodiment of the present application, before ultrasonic welding, the first annular protrusion and the first annular groove are positioned to ensure the accuracy of the connection and positioning of the tip tip and the front tube body. The first annular protrusion can ensure the circumferential sealing between the front tube body and the tip tip after welding.

[0014] Furthermore, a segmented elongated pipette tip in the present application also includes a second annular protrusion and a second annular groove adapted to the second annular protrusion, wherein the second annular protrusion and the second annular groove are respectively arranged on the end faces on both sides between the front tube body and the annular connecting plate, and the front tube body and the annular connecting plate are connected by ultrasonic welding. As a preferred embodiment of the present application, the accuracy of the connection and positioning of the front tube body and the adapter head is ensured by positioning the second annular protrusion and the second annular groove. The second annular protrusion can ensure the circumferential sealing between the front tube body and the adapter head after welding.

[0015] Furthermore, in a segmented and elongated pipette tip in the present application, a third annular positioning groove is provided on the annular connecting plate corresponding to the radial outer side of the tubular plug.

[0016] Furthermore, in the present application, a segmented elongated pipette tip has a radial dimension from one end of the front tube body near the tip tip to the other end that continuously increases, and a radial dimension of the rear section body that continuously increases in the same direction as the front tube body. As a preferred embodiment of the present application, correspondingly, the radial dimensions of the first liquid storage chamber and the second liquid storage chamber also continuously increase in the same direction.

[0017] Furthermore, in a segmented elongated pipette tip in the present application, a first annular flange is radially extended from one end of the rear tube body near the adapter head, and the radial size of the first annular flange is adapted to the radial size of the annular connecting plate.

[0018] Furthermore, in the present application, a segmented elongated pipette tip has a second annular flange radially extending from one end of the rear tube body near the front section, and a third annular flange adapted to the second annular flange is provided at one end of the front tube body near the rear tube body. As a preferred embodiment of the present application, the first annular flange, the second annular flange, and the third annular flange can increase the contact area of ​​the welding end face without increasing the thickness of the tube wall, thereby ensuring the reliability of the welding.

[0019] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0020] 1. The utility model provides a segmented elongated pipette tip. The present application adopts segmented injection molding of the front and rear segments. Compared with the pipette tip directly molded by one-piece injection molding, the present application is suitable for the situation that the pipette tip is not compatible with the general injection molding machine when the length of the pipette tip is extended to one-piece injection molding. Therefore, the segmented elongated pipette tip in the present application can adapt to the molding and manufacturing of long-sized pipette tips, and ensure the accuracy of the shape and size of the pipette tip, saving the manufacturing cost of the pipette tip mold.

[0021] 2. The utility model provides a segmented elongated pipette tip. The segmented manufacturing of the adapter head can imitate the shape of the tubular plug according to the connecting end of different pipettes, so it can flexibly match different models of pipettes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of a segmented and lengthened pipette tip in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A partial enlarged view of the area A in the middle circle;

[0024] Figure 3 for Figure 1A partial enlarged view of the area in the middle circle B.

[0025] In the figure: 1-front section; 11-tip of the suction head; 12-front tube body; 13-third annular flange; 2-rear section; 21-rear tube body; 22-first annular flange; 23-second annular flange; 3-adapter head; 31-tubular plug; 32-annular connecting plate; 321-third annular positioning groove; 33-positioning plug tube; 41-liquid passage cavity; 42-first liquid storage cavity; 43-second liquid storage cavity; 44-flow passage cavity; 511-first annular convex portion; 512-first annular groove; 521-second annular convex portion; 522-second annular groove. DETAILED DESCRIPTION Example

[0026] A segmented elongated pipette tip: comprising a front body 1 and a rear body 2; the front body 1 is integrally provided with a tip tip 11 and a front tube body 12, the rear body 2 is provided with a rear tube body 21, the ends of the front tube body 12 and the rear tube body 21 are connected by ultrasonic welding, and the tip tip 11 is arranged at an end of the front tube body 12 away from the rear tube body 21;

[0027] The end of the rear tube body 21 away from the front tube body 12 is connected to the adapter head 3, and the adapter head 3 includes a tubular plug head 31 adapted to the pipette. The end of the tubular plug head 31 close to the rear tube body 21 is provided with a radially extending annular connecting plate 32, and the annular connecting plate 32 is sealed and connected to the end of the rear tube body 21;

[0028] The front section body 1, the rear section body 2 and the adapter head 3 are provided with axially penetrating and connected fluid through cavities, and the fluid through cavities include: a liquid through cavity 41 corresponding to the tip 11 of the suction head, a first liquid storage cavity 42 corresponding to the front tube body 12, a second liquid storage cavity 43 corresponding to the rear tube body 21 and a flow channel cavity 44 corresponding to the adapter head 3.

[0029] Based on the above structure, the principle of the segmented elongated pipette tip is as follows: the adapter head 3 is connected to the external pipette through the tubular plug 31, and the flow channel cavity 44 is connected to the pipette. When performing the pipetting operation, the tip 11 of the pipette tip is placed in the liquid storage container, the pipette works to perform liquid extraction, and the liquid in the container is sucked from the liquid cavity 41 into the first liquid storage cavity 42 and the second liquid storage cavity 43, wherein the first liquid storage cavity 42 and the second liquid storage cavity 43 are used to store liquid; when performing the liquid discharge operation, the tip 11 of the pipette tip is aligned with the target container, the pipette works to perform liquid discharge, and the liquid stored in the first liquid storage cavity 42 and the second liquid storage cavity 43 is discharged from the liquid cavity 41 into the target container.

[0030] The present application adopts the front section body 1 and the rear section body 2 of segmented injection molding, which is suitable for the situation that the length of the pipette head is extended to the integral injection molding and does not match the general injection molding machine, compared with the pipette tip of direct integral injection molding. Therefore, a segmented elongated pipette tip in the present application can adapt to the molding and manufacturing of long-sized pipette tips, and ensure the accuracy of the shape and size of the pipette tip, saving the manufacturing cost of the pipette head mold. In addition, the segmented manufacturing of the adapter head 3 is to imitate the shape of the tubular plug 31 according to the connecting end of different pipettes, so it can flexibly match different types of pipettes. In the present embodiment, the overall length of a segmented elongated pipette tip is 209mm, and the lengths of the front section body 1 and the rear section body 2 are 93.3mm and 100mm, respectively. The overall capacity is 15ml.

[0031] In this embodiment, a positioning plug tube 33 is extended from one end of the annular connecting plate 32 , and the positioning plug tube 33 is disposed in the tube cavity of the rear tube body 21 .

[0032] In this embodiment, the radial dimension of the liquid passage cavity 41 is smaller than the radial dimension of the first liquid storage cavity 42 , and the radial dimension of the flow passage cavity 44 is smaller than the radial dimension of the second liquid storage cavity 43 .

[0033] In this embodiment, it also includes a first annular protrusion 511 and a first annular groove 512 adapted to the first annular protrusion 511 . The first annular protrusion 511 and the first annular groove 512 are respectively provided on the end surfaces on both sides between the front tube body 12 and the tip 11 of the suction head.

[0034] Before ultrasonic welding, the first annular protrusion 511 and the first annular groove 512 are positioned to ensure the accuracy of the connection and positioning of the tip 11 and the front tube body 12. The first annular protrusion 511 can ensure the sealing of the front tube body 12 and the tip 11 in the circumferential direction after welding.

[0035] In this embodiment, a second annular protrusion 521 and a second annular groove 522 adapted to the second annular protrusion 521 are further included, and the second annular protrusion 521 and the second annular groove 522 are respectively arranged on the end surfaces on both sides between the front tube body 12 and the annular connecting plate 32, and the front tube body 12 and the annular connecting plate 32 are connected by ultrasonic welding. The positioning of the second annular protrusion 521 and the second annular groove 522 ensures the accuracy of the connection and positioning of the front tube body 12 and the adapter head 3. The second annular protrusion 521 can ensure the sealing performance of the front tube body 12 and the adapter head 3 in the circumferential direction after welding.

[0036] In this embodiment, a third annular positioning groove 321 is provided on the annular connecting plate 32 corresponding to the radial outer side of the tubular plug 31 .

[0037] In this embodiment, the radial dimension of the front tube body 12 from one end near the tip 11 to the other end increases continuously, and the radial dimension of the rear section body 2 increases continuously in the same direction as the front tube body 12. Correspondingly, the radial dimensions of the first liquid storage chamber 42 and the second liquid storage chamber 43 also increase continuously in the same direction.

[0038] In this embodiment, a first annular flange 22 is radially extended from one end of the rear tube body 21 close to the adapter head 3 , and the radial dimension of the first annular flange 22 is adapted to the radial dimension of the annular connecting plate 32 .

[0039] In this embodiment, the rear tube body 21 has a second annular flange 23 radially extending from one end near the front section 1, and the front tube body 12 has a third annular flange 13 adapted to the second annular flange 23 at one end near the rear tube body 21. The first annular flange 22, the second annular flange 23, and the third annular flange 13 can increase the contact area of ​​the welding end face without increasing the thickness of the tube wall, thereby ensuring the reliability of welding.

[0040] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A segmented elongated pipette tip, characterized in that: The device comprises a front body (1) and a rear body (2); the front body (1) is integrally provided with a suction head tip (11) and a front tube body (12); the rear body (2) is provided with a rear tube body (21); the ends of the front tube body (12) and the rear tube body (21) are connected by ultrasonic welding; the suction head tip (11) is arranged at an end of the front tube body (12) away from the rear tube body (21); The end of the rear tube body (21) away from the front tube body (12) is connected to an adapter head (3), the adapter head (3) comprises a tubular plug head (31) adapted to the pipette, the end of the tubular plug head (31) close to the rear tube body (21) is provided with a radially outwardly extending annular connecting plate (32), the annular connecting plate (32) is sealedly connected to the end of the rear tube body (21); The front section body (1), the rear section body (2) and the adapter head (3) are provided with axially penetrating and connected fluid passage cavities, the fluid passage cavities comprising: a liquid passage cavity (41) corresponding to the tip (11) of the suction head, a first liquid storage cavity (42) corresponding to the front tube body (12), a second liquid storage cavity (43) corresponding to the rear tube body (21) and a flow passage cavity (44) corresponding to the adapter head (3).

2. A segmented elongated pipette tip according to claim 1, characterized in that: A positioning plug tube (33) is provided extending from one end of the annular connecting plate (32), and the positioning plug tube (33) is arranged in the tube cavity of the rear tube body (21).

3. The segmented elongated pipette tip according to claim 1, characterized in that: The radial dimension of the liquid passage cavity (41) is smaller than the radial dimension of the first liquid storage cavity (42), and the radial dimension of the flow passage cavity (44) is smaller than the radial dimension of the second liquid storage cavity (43).

4. The segmented elongated pipette tip according to claim 1, characterized in that: It also comprises a first annular protrusion (511) and a first annular groove (512) adapted to the first annular protrusion (511), wherein the first annular protrusion (511) and the first annular groove (512) are respectively provided on the end surfaces on both sides between the front tube body (12) and the tip (11) of the suction head.

5. The segmented elongated pipette tip according to claim 1, characterized in that: It also comprises a second annular protrusion (521) and a second annular groove (522) adapted to the second annular protrusion (521); the second annular protrusion (521) and the second annular groove (522) are respectively arranged on the end surfaces on both sides between the front tube body (12) and the annular connecting plate (32); the front tube body (12) and the annular connecting plate (32) are connected by ultrasonic welding.

6. The segmented elongated pipette tip according to claim 1, characterized in that: A third annular positioning groove (321) is provided on the annular connecting plate (32) corresponding to the radial outer side of the tubular plug (31).

7. The segmented elongated pipette tip according to claim 1, characterized in that: The radial dimension of the front tube body (12) from one end near the tip (11) of the suction head to the other end increases continuously, and the radial dimension of the rear section body (2) increases continuously in the same direction as the front tube body (12).

8. The segmented elongated pipette tip according to claim 1, characterized in that: A first annular flange (22) radially extends from one end of the rear tube body (21) near the adapter head (3), and the radial dimension of the first annular flange (22) is adapted to the radial dimension of the annular connecting plate (32).

9. The segmented elongated pipette tip according to claim 1, characterized in that: A second annular flange (23) radially extends from one end of the rear tube body (21) near the front section (1), and a third annular flange (13) adapted to the second annular flange (23) is provided on one end of the front tube body (12) near the rear tube body (21).

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