Tip for a pipette

Abstract

This utility model relates to the field of pipette technology, and in particular to a pipette tip for a pipette, including a pipette gun, with a pipette tip fitted onto a connector body at the bottom of the pipette gun; two trapezoidal protrusions are symmetrically arranged on the upper inner wall of the pipette tip, the protrusions fitting into an annular limiting groove of the connector, and a sealing ring is provided on the upper side of the limiting groove on the connector body, forming an interference fit between the sealing ring and the pipette tip to ensure a tight seal between the pipette tip and the connector; the pipette tip of this pipette is easy to install, reducing the reliance on operator skill in traditional installation methods, while ensuring a tight seal between the pipette tip and the connector.

Description

Technical Field

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

[0002] Multichannel pipettes, as core metrological testing tools in laboratories, can achieve batch liquid transfer by simultaneously controlling 8-12 independent channels. The metrological performance of multichannel pipettes directly affects the reliability of experimental data.

[0003] As a precision metrological tool, the correct installation of the pipette tip in a multichannel pipette is crucial for ensuring pipetting accuracy and repeatability. Because each channel of a current multichannel pipette has a tapered end, precise installation angle and force are required when installing the tip. During installation, align the tip with the tapered end of the pipette and insert it at approximately a 15-degree angle. Slightly rock it back and forth or gently wiggle it left and right to ensure even force distribution and proper positioning. This requires a high level of operator skill. However, in practice, it is difficult to precisely control the tilt angle; an excessively large angle may cause the tip to deform on one side, affecting the seal.

[0004] Therefore, this application provides a pipette tip for a pipette to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a pipette tip for pipettes that solves the problem of difficulty in controlling the tilt angle during installation of existing pipette tips.

[0006] To solve the above-mentioned technical problems, this utility model provides a pipette tip for a pipette, including a pipette, and a pipette tip is adapted to be mounted on the connector body at the bottom of the pipette; two trapezoidal protrusions are symmetrically arranged on the upper inner wall of the pipette tip, and the protrusions are adapted to be embedded in the annular groove of the connector. A sealing ring is provided on the upper side of the groove on the connector body, and the sealing ring and the pipette tip form an interference fit so that the pipette tip and the connector are tightly sealed.

[0007] A further improvement of this utility model is that: an annular arc-shaped groove is provided in the middle of the connector, and a sealing ring is embedded in the arc-shaped groove, with the sealing ring protruding 0.1~0.5mm from the outer wall of the connector.

[0008] A further improvement of this utility model is that an annular groove is provided on the lower side of the arc-shaped groove on the outer wall of the connector, and the cross-section of the groove is rectangular.

[0009] A further improvement of this utility model is that two hollowed-out trapezoidal protrusions are integrally and symmetrically arranged on the upper inner wall of the suction head, and the protrusions are adapted to be embedded in the groove.

[0010] A further improvement of this utility model is that a concave touch portion is provided on the outer side of the protrusion on the outer wall of the suction head.

[0011] A further improvement of this utility model is that the horizontal thickness of the protrusion is equal to the groove depth, and the groove depth is 0.5~2mm.

[0012] A further improvement of this utility model is that: several connectors are evenly spaced at the bottom of the pipette, and the connectors are hollow tubular structures.

[0013] A further improvement of this utility model is that: an annular upper piece is provided at the upper part of the connector, the upper piece abuts against the lower piece, and the lower piece is provided at the top of the suction head.

[0014] A further improvement of this utility model is that the sealing ring has a circular cross-section and is made of elastic fluororubber.

[0015] A further improvement of this utility model is that the suction head is made of any one of transparent polypropylene, polycarbonate, or silicone.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] 1. This utility model provides a pipette tip for a pipette. The inner wall of the pipette tip is provided with a hollowed-out trapezoidal protrusion. During installation, simply insert the pipette tip vertically upwards into the connector. When you hear a "click", it means that the protrusion is fully embedded in the limiting groove, and the installation is complete. Through the guiding effect of the trapezoidal protrusion, the pipette tip can be inserted into the connector at the bottom of the pipette more easily without repeatedly adjusting the angle or hitting it forcefully, reducing the dependence on the operator's skills in traditional installation methods. At the same time, when removing the pipette tip, simply press the touch part inward lightly, the hollowed-out protrusion is flattened, and the pipette tip can be pulled down to detach from the connector. The operation is simple.

[0018] 2. The present invention provides a pipette tip for a pipette, wherein the trapezoidal protrusion and the rectangular limiting groove engage to form mechanical resistance, preventing the pipette tip from falling off during pipetting due to liquid backflow or operational vibration.

[0019] 3. The present invention provides a pipette tip for a pipette, wherein the sealing ring protrudes 0.1~0.5mm from the outer wall of the connector, so that the connector and the pipette tip form an interference fit. After the pipette tip is installed, the pipette tip generates a pre-tightening force, which makes the pipette tip and the connector fit more tightly and significantly reduces the risk of reagent leakage.

[0020] 4. The present invention provides a pipette tip for a pipette, wherein the upper plate abuts against the lower plate to indicate that the pipette tip is installed in place. During use, the distance between the upper and lower plates can be observed to determine whether the pipette tip is installed in place or has been displaced. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a pipette tip used in a pipette;

[0023] Figure 2 This is a schematic diagram of the pipette and its connector;

[0024] Figure 3 Enlarged view of the connector and sealing ring;

[0025] Figure 4 This is a cross-sectional view of the connector and suction head;

[0026] Figure 5 This is a schematic diagram of the suction head.

[0027] Reference numerals: 1. Pipette; 2. Connector; 21. Limiting groove; 22. Sealing ring; 23. Arc-shaped groove; 24. Upper plate; 3. Pipe tip; 31. Protrusion; 32. Touch part; 33. Lower plate. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0031] The present invention will be further explained below with reference to specific embodiments.

[0032] like Figures 1-5 As shown, this embodiment provides a pipette tip for a pipette, including a pipette 1, with a pipette tip 3 adapted to be mounted on the connector 2 body at the bottom of the pipette 1; two trapezoidal protrusions 31 are symmetrically arranged on the upper inner wall of the pipette tip 3, and the protrusions 31 are adapted to be embedded in the annular limiting groove 21 of the connector 2. A sealing ring 22 is provided on the upper side of the limiting groove 21 on the connector 2 body, and the sealing ring 22 and the pipette tip 3 form an interference fit to make the pipette tip 3 and the connector 2 tightly seal; specifically, eight connectors 2 are provided at the bottom of the pipette 1 body, the connectors 2 are hollow tubular bodies, and the sealing rings 2 are nested on the outer wall of the connectors 2. 2. During installation, the sealing ring 22 is used to tightly abut against the inner wall of the suction head 3, so that the suction head 3 and the connector 2 are tightly sealed. When the protrusion 31 on the inner wall of the suction head 3 "clicks" into the limiting groove 21, the suction head 3 is installed. Through the guiding effect of the trapezoidal protrusion 31, the connector 2 can be inserted into the suction head 3 more easily without repeatedly adjusting the angle or hitting it hard, reducing the dependence on the operator's skills in the traditional installation method. At the same time, when disassembling the suction head 3, simply press the touch part 32 inward, the hollow protrusion 31 is flattened, and the suction head 3 can be pulled down to detach from the connector 2. The operation is simple.

[0033] like Figures 3-4 As shown, in this embodiment, an annular arc-shaped groove 23 is provided in the middle of the connector 2, and a sealing ring 22 is embedded in the arc-shaped groove 23. The sealing ring 22 protrudes 0.1~0.5mm from the outer wall of the connector 2. Specifically, the sealing ring 22 protrudes 0.3mm from the outer wall of the connector 2, so that the connector 2 and the pipette tip 3 form an interference fit. After the pipette tip 3 is installed, the pipette tip 3 generates a pre-tightening force, so that the pipette tip 3 and the connector 2 fit more tightly, significantly reducing the risk of reagent leakage.

[0034] like Figure 1 , Figure 3 , Figure 4As shown, in this embodiment, an annular limiting groove 21 is provided on the lower side of the arc-shaped groove 23 on the outer wall of the connector 2. The limiting groove 21 has a rectangular cross-section. Two hollow trapezoidal protrusions 31 are symmetrically and integrally provided on the upper inner wall of the suction head 3. The protrusions 31 are adapted to be embedded in the limiting groove 21. The horizontal thickness of the protrusions 31 is equal to the depth of the limiting groove 21, which is 0.5~2mm deep. A concave touch part 32 is provided on the outer side of the protrusions 31 on the outer wall of the suction head 3. Specifically, the limiting groove 21 has a depth of 1mm. The engagement of the trapezoidal protrusions 31 with the rectangular limiting groove 21 forms mechanical resistance, preventing the suction head 3 from falling off due to liquid backflow or operational vibration during the liquid transfer process. At the same time, the hollow protrusions 31 have a certain degree of elasticity. When disassembling the suction head 3, simply press the touch part 32 inward, and the hollow protrusions 31 will be compressed and contracted. At the same time, pull the suction head 3 downward, and the protrusions 31 can be disengaged from the limiting groove 21, making disassembly convenient.

[0035] like Figure 2-4 As shown in this embodiment, a plurality of connectors 2 are evenly spaced at the bottom end of the pipette 1. The connectors 2 are hollow tubular structures. An annular upper plate 24 is provided on the upper part of the connector 2. The upper plate 24 abuts against the lower plate 33. The lower plate 33 is located at the top of the pipette tip 3. Specifically, eight connectors 2 are evenly spaced at the bottom end of the pipette 1. The eight connectors 2 respectively pass through eight channels. After the pipette tip 3 is installed, the upper plate 24 abuts against the lower plate 33. In actual use, the distance between the upper plate 24 and the lower plate 33 can be observed to determine whether the pipette tip 3 is installed in place or whether the pipette tip 3 has been displaced.

[0036] like Figure 3 , Figure 5 As shown, in this embodiment, the sealing ring 22 has a circular cross-section and is made of elastic fluororubber; the suction head 3 is made of any one of transparent polypropylene, polycarbonate, or silicone; specifically, the sealing ring 22 is made of fluororubber, which has good corrosion resistance, the suction head 3 has scale lines on its outer surface, and the suction head 3 is made of transparent polypropylene.

[0037] This utility model provides a working principle for a pipette tip: In use, the operator holds the pipette body 1 with one hand and pinches the touch part 32 of the pipette tip 3 with the thumb and forefinger of the other hand, with the top of the pipette tip 3 perpendicular to the bottom of the connector 2, and inserts the pipette tip 3 vertically upwards into the connector 2. When a "click" is heard, it means that the protrusion 31 is fully embedded in the limiting groove 21, and the installation is completed. At this time, the upper piece 24 abuts against the lower piece 33. When disassembling the pipette tip 3, simply press the touch part 32 inward with the thumb and forefinger, and the hollow protrusion 31 will be compressed and retracted. At the same time, pull the pipette tip 3 downwards, and the protrusion 31 can be disengaged from the limiting groove 21, making disassembly convenient.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pipette tip for a pipette, characterized in that, Includes a pipette (1), and a pipette tip (3) is fitted on the connector (2) at the bottom of the pipette (1); two trapezoidal protrusions (31) are symmetrically arranged on the upper inner wall of the pipette tip (3), and the protrusions (31) are fitted into the annular limiting groove (21) of the connector (2). A sealing ring (22) is provided on the upper side of the limiting groove (21) on the connector (2) body, and the sealing ring (22) and the pipette tip (3) form an interference fit so that the pipette tip (3) and the connector (2) are tightly sealed.

2. A pipette tip for a pipette according to claim 1, characterized in that, The connector (2) has an annular arc groove (23) in the middle, and a sealing ring (22) is embedded in the arc groove (23). The sealing ring (22) protrudes 0.1~0.5mm from the outer wall of the connector (2).

3. A pipette tip for a pipette according to claim 2, characterized in that, An annular limiting groove (21) is provided on the lower side of the arc-shaped groove (23) on the outer wall of the connector (2), and the cross section of the limiting groove (21) is rectangular.

4. A pipette tip for a pipette according to claim 1, characterized in that, The upper inner wall of the suction head (3) is symmetrically and integrally provided with two hollowed trapezoidal protrusions (31), and the protrusions (31) are adapted to be embedded in the limiting groove (21).

5. A pipette tip for a pipette according to claim 4, characterized in that, A recessed touch portion (32) is provided on the outer side of the protrusion (31) on the outer wall of the suction head (3).

6. A pipette tip for a pipette according to claim 5, characterized in that, The horizontal thickness of the protrusion (31) is equal to the depth of the limiting groove (21), and the depth of the limiting groove (21) is 0.5~2mm.

7. A pipette tip for a pipette according to claim 1, characterized in that, The bottom of the pipette (1) is evenly spaced with several connectors (2), and the connectors (2) are hollow tubular structures.

8. A pipette tip for a pipette according to claim 7, characterized in that, The connector (2) has an annular upper piece (24) on its upper part, which abuts against the lower piece (33), and the lower piece (33) is located at the top of the suction head (3).

9. A pipette tip for a pipette according to claim 1, characterized in that, The sealing ring (22) has a circular cross-section and is made of elastic fluororubber.

10. A pipette tip for a pipette according to claim 1, characterized in that, The suction head (3) is any one of transparent polypropylene, polycarbonate or silicone.

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