Novel pipetting suction head

Abstract

The utility model relates to the technical field of pipetting tips, and discloses a novel pipetting tip, which comprises a tip main body, and the tip main body is used for bearing the whole body and accommodating liquid; one end of the connecting pipe is fixedly connected to one end of the suction head main body, and the connecting pipe is used for connecting the suction head main body with the pipettor; and the outer wall of the limiting ring is fixedly connected to the other end of the connecting pipe, and the limiting ring is used for preventing the connecting pipe from deforming due to the fact that the diameter of the connecting pipe is expanded. According to the utility model, the connecting pipe and the pipettor are sealed through the sealing ring, the connecting strength of the connecting pipe and the pipettor is improved through the plurality of convex points at the interface of the connecting pipe, and the limiting ring is used for limiting to prevent the connecting pipe from being expanded and deformed, so that the effect of improving the connecting strength is achieved, and the problem that the connecting pipe is not easy to deform when the pipette tip is connected with a pipette is solved. The problems that the pipetting tip is easy to loosen due to plugging connection and the connection part is easy to be expanded to deform and cause insufficient sealing are solved, and the connection strength of the pipetting tip is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipette tip technology, and in particular to a novel pipette tip. Background Technology

[0002] With the development of precision experimental fields such as molecular biology, clinical medicine, and pharmaceutical engineering, higher demands are being placed on the accuracy, sealing, and contamination control in liquid handling processes. As a commonly used liquid transfer tool in laboratories, pipettes are typically used in conjunction with pipette tips to achieve precise liquid aspiration and transfer. The structural design of the pipette tip directly affects the sealing reliability, operational stability, and contamination prevention performance of the entire pipetting system. Therefore, developing new pipette tips with good connection performance and anti-contamination capabilities is of great significance for improving the reliability and safety of experimental operations.

[0003] In existing technologies, pipette tips generally employ a conical design, with their tail end connecting to the tip of the pipette via an insertion method, relying on the shape fit to achieve a preliminary seal. Some products utilize thicker plastic materials to provide a certain degree of mechanical strength, while also incorporating internal flow channels for liquid aspiration. However, because the connection method remains primarily based on simple plug-and-play, lacking structural constraints to enhance connection strength, and typically lacking dedicated negative pressure regulation or splash control devices, improper handling during aspiration can easily lead to liquid surging or even entering the pipette interior, thus affecting equipment lifespan and creating a risk of cross-contamination.

[0004] Meanwhile, existing pipette tips suffer from insufficient stability when connected to the pipette. Traditional designs often rely on a single insertion force for sealing and fixation; however, repeated insertion and removal by the user, or even slight deviations during pipetting, can cause the tip to loosen or detach, leading to decreased sealing and affecting aspiration accuracy. More seriously, a weak connection can cause leakage, splashing, or backflow of reagents into the pipette when aspirating highly volatile or contaminating reagents, damaging the equipment and severely threatening operational safety. Therefore, there is an urgent need for an improved pipette tip that achieves a more stable connection and provides both anti-loosening and effective sealing. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a novel pipette tip, which aims to improve the problem that when the pipette tip is connected to the pipette, the connection is prone to loosening through plugging and unplugging, and the connection is prone to stretching and deformation, resulting in insufficient sealing.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a novel pipette tip, comprising:

[0007] The suction head body is used to support the entire assembly and contain the liquid;

[0008] A connecting tube, one end of which is fixedly connected to one end of the pipette tip body, is used to connect the pipette tip body to the pipette.

[0009] A limiting ring is fixedly connected to the other end of the connecting pipe via its outer wall. The limiting ring is used to prevent the diameter of the connecting pipe from being stretched and deformed.

[0010] The protrusions are arranged in a ring array on the outer wall and fixedly connected to the inner wall of the connecting tube. The protrusions are used to improve the connection strength between the connecting tube and the pipette.

[0011] A sealing ring, the outer wall of which is fixedly connected to the inner wall of the connecting tube, is used to seal the connecting tube and the pipette;

[0012] A reinforcing rib is fixedly connected to the outer wall of the connecting pipe on one side, and the reinforcing rib is used to improve the overall strength of the connecting pipe.

[0013] As a further description of the above technical solution:

[0014] A fixing ring is fixedly connected inside the connecting pipe, and a breathable and hydrophobic membrane is fixedly connected to the inner wall of the fixing ring.

[0015] As a further description of the above technical solution:

[0016] The breathable and hydrophobic membrane has micropores inside, and the diameter of the micropores is 0.22 to 0.45 μm.

[0017] As a further description of the above technical solution:

[0018] The breathable and hydrophobic membrane is used to prevent liquid from entering the connecting tube and contacting the pipette.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the suction head body is fixedly connected with guide rods arranged in a ring array, which are used to guide liquid into the suction head body.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the connecting tube and the pipette are first sealed by a sealing ring. At the same time, the connecting tube has multiple protrusions at the interface to improve the connection strength between the connecting tube and the pipette. The connecting tube is also limited by a limiting ring to prevent it from being stretched and deformed. This achieves the effect of improving the connection strength and solves the problem that when connecting pipette tips and pipettes in the traditional way, the connection is easy to loosen by plugging and unplugging, and the connection is easy to be stretched and deformed, resulting in insufficient sealing. This improves the connection strength of the pipette tip.

[0023] 2. In this utility model, the liquid is guided into the pipette head body through the guide rod on the inner wall of the pipette head body. At the same time, the gas permeates through the micropores on the breathable and hydrophobic membrane in the connecting tube, creating a negative pressure inside the pipette head body to draw in the liquid. This achieves the effect of preventing liquid from splashing inside, solving the problem of easy internal splashing of the pipette head, causing liquid to come into contact with the pipette itself, resulting in pipette contamination and cross-contamination, and improving the practicality of the pipette head. Attached Figure Description

[0024] Figure 1 This is a perspective view of a novel pipette tip proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the main body of a novel pipette tip proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the breathable and hydrophobic membrane structure of a novel pipette tip proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the guide rod structure of a novel pipette tip proposed in this utility model.

[0028] Legend:

[0029] 1. Suction head body; 2. Connecting tube; 3. Limiting ring; 4. Reinforcing rib; 5. Protrusion; 6. Sealing ring; 7. Fixing ring; 8. Breathable and hydrophobic membrane; 9. Micropores; 10. Guide rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 and Figure 2 One embodiment of this utility model is a novel pipette tip, comprising:

[0032] The pipette head body 1 is used to support the whole and contain the liquid. Its interior is a hollow structure, which can be used to temporarily store the sample liquid being aspirated, while providing a liquid flow path. It is suitable for various liquid transfer operations and ensures stability and compatibility during the liquid aspiration process.

[0033] Connecting tube 2, one end of which is fixedly connected to one end of the pipette tip body 1. Connecting tube 2 is used to connect the pipette tip body 1 to the pipette. Its shape is conical, which makes it easy to insert and adapt to various types of pipette nozzles. At the same time, the rigid material improves the connection stability.

[0034] The limiting ring 3 is fixedly connected to the other end of the connecting tube 2 on its outer wall. The limiting ring 3 is used to prevent the diameter of the connecting tube 2 from being stretched and deformed, thereby suppressing the deformation of the connection part under the action of external insertion force, maintaining the consistency of the insertion size, extending the service life of the suction head and improving the reliability and firmness of the assembly.

[0035] The reinforcing rib 4 is fixedly connected to the outer wall of the connecting tube 2 on one side. The reinforcing rib 4 is used to improve the overall strength of the connecting tube 2, enhance the resistance to deformation of the suction head during the insertion and removal process, and avoid structural fatigue or loose connection due to long-term use or repeated insertion and removal.

[0036] The protrusions 5 are arranged in a ring array on the outer wall and fixedly connected to the inner wall of the connecting tube 2. The protrusions 5 are used to improve the connection strength between the connecting tube 2 and the pipette. By increasing the frictional contact area, they enhance the mechanical interlocking force of the connection, prevent the pipette tip from accidentally falling off during aspiration or pipetting, and improve the safety of use.

[0037] The sealing ring 6 is fixedly connected to the inner wall of the connecting tube 2. The sealing ring 6 is used to seal the connecting tube 2 and the pipette. It is made of elastic sealing material and can automatically fit the outer wall of the pipette during the insertion process, effectively preventing gas or liquid leakage and ensuring the pipetting accuracy and system cleanliness.

[0038] Reference Figure 3 and Figure 4A fixing ring 7 is fixedly connected inside the connecting tube 2. The fixing ring 7 is used to support and stably install the breathable and hydrophobic membrane 8 structure. Its material should have a certain rigidity to ensure that the membrane does not shift or deform under negative pressure. The breathable and hydrophobic membrane 8 is fixedly connected to the inner wall of the fixing ring 7. The breathable and hydrophobic membrane 8 is used to prevent liquid from entering the connecting tube 2 and contacting the pipette. Its material is a microporous membrane material with excellent hydrophobic properties, such as polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF), to ensure that liquid backflow is effectively blocked while gas flows normally. The breathable and hydrophobic membrane 8 has micropores 9 inside, with a diameter of 0.22 to 0.45 μm. The diameter range enables effective blocking of liquid droplets, especially suitable for preventing liquid splashing caused by operational errors or liquid backflow, while allowing air to escape smoothly to maintain negative pressure for liquid aspiration, ensuring stable and safe pipetting operations; the addition of a breathable structure enhances the safety and applicability of the entire pipette tip system and avoids contamination of the pipette tubing; the inner wall of the pipette tip body 1 is fixedly connected with guide rods 10 arranged in a ring array. The guide rods 10 are used to guide liquid into the pipette tip body 1. Their structural design helps to change the liquid flow path, reduce liquid column fluctuation, and reduce the risk of liquid forming eddies or bubbles during liquid aspiration, thereby improving aspiration accuracy and liquid level control stability.

[0039] Working principle: When using this new type of pipette tip, the tip body 1 is first connected to the pipette through the connecting tube 2. The connecting tube 2 and the pipette are sealed by the sealing ring 6. At the same time, the connecting tube 2 has multiple protrusions 5 at the interface to improve the connection strength between the connecting tube 2 and the pipette. The connecting tube 2 is limited by the limiting ring 3 to prevent the connecting tube 2 from being stretched and deformed. At the same time, the multiple reinforcing ribs 4 set on the outer wall of the connecting tube 2 can improve the overall strength of the connecting tube 2, thus achieving the effect of improving the connection strength.

[0040] When liquid needs to be drawn, the pipette is operated. Gas passes through the micropores 9 on the breathable and hydrophobic membrane 8 in the connecting tube 2, creating a negative pressure inside the pipette head body 1. Under the action of negative pressure, the liquid is guided into the pipette head body 1 through the guide rod 10 on the inner wall of the pipette head body 1. At the same time, when the volume inside the pipette head body 1 is ≥80%, the breathable and hydrophobic membrane 8 can prevent liquid from passing through the breathable and hydrophobic membrane 8 into the connecting tube 2, avoiding liquid contamination of the pipette and achieving the effect of preventing liquid splashing.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel pipette tip, characterized in that, include: The suction head body (1) is used to receive the whole and contain the liquid; Connecting tube (2), one end of which is fixedly connected to one end of the pipette tip body (1), the connecting tube (2) is used to connect the pipette tip body (1) to the pipette; The limiting ring (3) is fixedly connected to the other end of the connecting pipe (2) on its outer wall. The limiting ring (3) is used to prevent the diameter of the connecting pipe (2) from being stretched and deformed. The protrusions (5) are arranged in a ring array on the outer wall and fixedly connected to the inner wall of the connecting tube (2). The protrusions (5) are used to improve the connection strength between the connecting tube (2) and the pipette. A sealing ring (6) is fixedly connected to the inner wall of the connecting tube (2) on its outer wall. The sealing ring (6) is used to seal the connecting tube (2) and the pipette. A reinforcing rib (4) is fixedly connected to the outer wall of the connecting pipe (2) on one side. The reinforcing rib (4) is used to improve the overall strength of the connecting pipe (2).

2. The novel pipette tip according to claim 1, characterized in that: The connecting tube (2) is fixedly connected to a fixing ring (7), and the inner wall of the fixing ring (7) is fixedly connected to a breathable and hydrophobic membrane (8).

3. The novel pipette tip according to claim 2, characterized in that: The breathable and hydrophobic membrane (8) has micropores (9) inside, and the diameter of the micropores (9) is 0.22 to 0.45 μm.

4. The novel pipette tip according to claim 2, characterized in that: The breathable and hydrophobic membrane (8) is used to prevent liquid from entering the connecting tube (2) and contacting the pipette.

5. A novel pipette tip according to claim 1, characterized in that: The inner wall of the suction head body (1) is fixedly connected with guide rods (10) arranged in a ring array, and the guide rods (10) are used to guide liquid into the suction head body (1).

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