CN208975833U - A kind of high-precision pipetting tip - Google Patents

Abstract

The utility model discloses a kind of high-precision pipetting tips, including elongated tubular container, the upper end port of the elongated tubular container is connected with pipettor, the elongated tubular container is an integral molding structure, comprising: the upper end opening for receiving pipette axis on the pipettor, for receiving the tip opening of liquid and liquid separation and the upper wall portions being configured between the upper end opening and tip opening and lower wall portion, the tip opening is the tip inlets with single corner cut or double corner cuts, the range of the shear-face angle of its single corner cut or double corner cuts is 10 ° -60 °, the shear-face angle of the list corner cut or double corner cuts is that tip opening end face and elongated tubular container horizontal axis are formed by angle.The utility model reduces the consuming of liquid, avoids volume error caused by hanging pearl, improves the accuracy of multiple liquid separation, CV value can be made more accurate.

Description

A kind of high-precision pipetting tip

Technical field

The utility model relates to biology, chemical device technical field, more particularly to a kind of high-precision liquid reliefs Suction nozzle.

Background technique

Pipettor is the instrument being commonly used in the experiment in the fields such as chemistry, biology, medical treatment or procedure, liquid relief Suction nozzle is then and the matching used device of pipettor.Now, molecular biology experiment is low anti-with micro updating more and more Volume is answered to carry out, it usually needs shift and equipped with accurate low volume liquid come complete using the pipette of micropipet tip At operation.And for the precision of transfer liquid quantity, maximum influence factor is exactly remaining on pipetting tip The number of liquid.

But be each designed to be horizontal opening at its liquid relief mouth of existing pipetting tip at present, this structure easily goes out Pearl phenomenon is now hung, the liquid separation precision of pipetting tip has been seriously affected.Therefore, the adsorption effect for how improving pipetting tip, makes it The problem of reducing wall built-up, improve the accuracy of liquid separation, becoming as those skilled in the art's urgent need to resolve.

Utility model content

In view of this, the present invention provides a kind of high-precision pipetting tips.

To achieve the goals above, the utility model adopts the following technical solution:

A kind of high-precision pipetting tip, including elongated tubular container, the upper end port and liquid relief of the elongated tubular container Device is connected, and the elongated tubular container is an integral molding structure comprising: for receiving pipette axis on the pipettor Upper end opening, the tip opening for receiving liquid and liquid separation and the upper wall portions being configured between the upper end opening and tip opening And lower wall portion, the tip opening are the tip inlets with single corner cut or double corner cuts, the section angle of single corner cut or double corner cuts The range of degree is 10 ° -60 °, and the shear-face angle of the list corner cut or double corner cuts is tip opening end face and elongated tubular container water Flat axis is formed by angle.

The utility model has the following beneficial effects: having by the way that the tip opening of pipetting tip to be changed to from 0 ° of horizontal angle The tip inlets of single corner cut or double corner cuts, and the shear-face angle of single corner cut or double corner cuts is limited to 10 ° -60 °, such liquid relief is inhaled When distribute liquid, liquid comes out to be not easy to form liquid droplet and hang on suction nozzle head from tip, so as to avoid tip opening extension pearl Caused by volume error, significantly improve the accuracy of suction nozzle liquid relief.

Based on the above technical solution, the utility model can also make following improvement:

Further, the range of the shear-face angle of single corner cut or double corner cuts is 20 ° -50 °.

The range of the shear-face angle of single corner cut or double corner cuts is 10 ° -60 ° in the utility model, and more preferably range is It 20 ° -50 °, because only that the tip opening of pipetting tip just can guarantee the less residual for hanging pearl in liquid relief under this range, protects The accuracy for demonstrate,proving liquid separation, can all cause accurate liquid relief effect not lower than the minimum of above-mentioned angular range or higher than peak It is ideal.

Further, the shear-face angle of single corner cut or double corner cuts is preferably 30 °.

Further, the shear-face angle of single corner cut or double corner cuts is preferably 45 °.

When the shear-face angle of single corner cut or double corner cuts is 30 ° or 45 °, liquid flows out from the tip opening of pipetting tip When its tip inlets wall built-up residual be it is relatively minimal, volume error caused by liquid relief can be preferably minimized.

Further, the upper wall portions and lower wall portion are from top to bottom integrally conical shape, and the minimum of the upper wall portions Diameter is greater than the maximum gauge of the lower wall portion, and the two is connected by the connecting tube of a trapezoidal shape.The structure can be utmostly Reduction liquid relief error.

Further, gasket seal is equipped on the upper end opening and the pipettor between pipette axis.It can keep away in this way Exempt from pipetting tip and pipettor to leak air during the work time or the case where leakage, influence whole device collect and liquid separation Work.

It can be seen via above technical scheme that compared with prior art, the utility model, which discloses, provides a kind of high-precision Pipetting tip tip opening is designed to that the tip with single corner cut or double corner cuts is opened by improving the shape of liquid relief mouth Mouthful, reduce and hang pearl residual, improves the accuracy of pipetting tip, improve the accuracy of multiple liquid separation, CV value can be made more smart It is quasi-.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 attached drawing is the structural schematic diagram of the pipetting tip under existing design；

Fig. 2 attached drawing is the structural schematic diagram I that the utility model tip opening is single corner cut；

Fig. 3 attached drawing is the structural schematic diagram II that the utility model tip opening is single corner cut；

Fig. 4 attached drawing is the structural schematic diagram III that the utility model tip opening is single corner cut；

Fig. 5 attached drawing is the structural schematic diagram IV that the utility model tip opening is single corner cut；

Fig. 6 attached drawing is the schematic diagram of Fig. 2 the midsagittal plane angle:

Fig. 7 attached drawing is the structural schematic diagram I that the utility model tip opening is double corner cuts；

Fig. 8 attached drawing is the structural schematic diagram II that the utility model tip opening is double corner cuts；

Fig. 9 attached drawing is the structural schematic diagram III that the utility model tip opening is double corner cuts；

Figure 10 attached drawing is the structural schematic diagram IV that the utility model tip opening is double corner cuts；

Figure 11 attached drawing is the schematic diagram of Fig. 7 the midsagittal plane angle.

Wherein, in figure,

1- upper end opening；2- upper wall portions；3- lower wall portion；4- tip opening, the mono- corner cut of 41-, the bis- corner cuts of 42-；5- connecting tube.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1, it is disclosed that the structural schematic diagram of the pipetting tip under existing design, for comparison.

As shown in figs. 2-11, the utility model embodiment discloses a kind of high-precision pipetting tip, including elongated tubular product The upper end port of container, the elongated tubular container is connected with pipettor, and elongated tubular container is an integral molding structure, and specifically exists It directlys adopt corresponding mold when production to be made, production method is simple, and Expenses Cost is low.

Include: in elongated tubular container for receive the upper end opening 1 of pipette axis on the pipettor, for receive liquid and The tip opening 4 of liquid separation and the upper wall portions 2 being configured between the upper end opening 1 and tip opening 4 and lower wall portion 3.

Wherein, gasket seal can be equipped on upper end opening 1 and pipettor between pipette axis or be taken other kinds of close The case where envelope measure to ensure pipetting tip and pipettor is during the work time not in gas leakage or leakage, avoids influencing whole The receipts liquid of a device and liquid separation work.

Specifically, upper wall portions 2 and lower wall portion 3 are from top to bottom integrally conical shape, and the minimum diameter of upper wall portions 2 is greater than The maximum gauge of lower wall portion 3, the two are connected by the connecting tube 5 of a trapezoidal shape, and the purpose being designed in this way is: first ensuring that Pipetting tip can contain the solution of sufficient amount, but because caliber is smaller, and the height of liquid is got in the case where given volume Height, therefore upper wall portions 2 and 3 bottom end of lower wall portion are narrower, can be more easier to judge the volume change of liquid by the variation of height, And then convenient accurately liquid relief, liquid relief error is reduced to the greatest extent.

As shown in figs. 2-11, the tip opening 4 in elongated tubular container is the tip with single corner cut 41 or double corner cuts 42 The range of the shear-face angle of opening, single corner cut 41 or double corner cuts 42 is 10 ° -60 °, and preferred range is 20 ° -50 °, more more Preferred value range is 30 ° and 45 °.The shear-face angle of single corner cut 41 or double corner cuts 42 described in the utility model is opened for tip Mouthful 4 end faces and elongated tubular container horizontal axis are formed by angle, i.e., as shown in Fig. 6 and Figure 11 in ∠ A.

The tip opening 4 of pipetting tip just can guarantee in liquid relief under the range of above-mentioned shear-face angle hangs the less residual of pearl It stays, guarantees the accuracy of liquid separation, accurate liquid relief can all be caused to imitate lower than the minimum of above-mentioned angular range or higher than peak Fruit it is undesirable.

The utility model provides the structural schematic diagram of the pipetting tip under existing design, tip opening as shown in Figure 1 Place is horizontal configuration.

The utility model provides tip opening 4 for four kinds of structural schematic diagrams of single corner cut 41, in Fig. 2 as shown in Figure 2-5 The shear-face angle of single corner cut 41 is 15 °, and the shear-face angle of single corner cut 41 is 30 ° in Fig. 3, the shear-face angle of single corner cut 41 in Fig. 4 It is 45 °, the shear-face angle of single corner cut 41 is 60 ° in Fig. 5.

The utility model provides tip opening 4 for four kinds of structural schematic diagrams of double corner cuts 42, in Fig. 6 as is seen in figs 7-10 The shear-face angle of double corner cuts 42 is 15 °, and the shear-face angle of double corner cuts 42 is 30 ° in Fig. 7, the shear-face angle of double corner cuts 42 in Fig. 8 It is 45 °, the shear-face angle of double corner cuts 42 is 60 ° in Fig. 9.

The tip opening structure of existing pipetting tip is improved to angled point from horizontal 0 ° by the utility model End opening, the extension pearl that this sample liquid pearl generates under the action of surface tension can reduce, and liquid is not easy to be formed small when coming out from tip Drop remains at the tip opening 4 of pipetting tip, reduces the consuming of liquid, avoids volume error caused by hanging pearl, mentions The accuracy of high repeatedly liquid separation, keeps CV value more accurate.

It is quick and precision is high that drawing liquid, the process of liquid relief are carried out using the utility model, and there is very strong practicability, be suitable for big Range, multi-field popularization and use.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims (6)

1. a kind of high-precision pipetting tip, including elongated tubular container, the upper end port and pipettor of the elongated tubular container It is connected, it is characterised in that: the elongated tubular container is an integral molding structure comprising: for receiving the pipettor The upper end opening of pipette axis, the tip opening for receiving liquid and liquid separation and be configured at the upper end opening and tip opening it Between upper wall portions and lower wall portion, the tip opening be the tip inlets with single corner cut or double corner cuts, single corner cut or double cut The range of the shear-face angle at angle be 10 ° -60 °, it is described list corner cut or double corner cuts shear-face angle be tip opening end face with it is elongated Tubular container horizontal axis is formed by angle.

2. a kind of high-precision pipetting tip according to claim 1, it is characterised in that: the list corner cut or double corner cuts The range of shear-face angle is 20 ° -50 °.

3. a kind of high-precision pipetting tip according to claim 1 or 2, it is characterised in that: the list corner cut double is cut The shear-face angle at angle is preferably 30 °.

4. a kind of high-precision pipetting tip according to claim 1 or 2, it is characterised in that: the list corner cut double is cut The shear-face angle at angle is preferably 45 °.

5. a kind of high-precision pipetting tip according to claim 1, it is characterised in that: the upper wall portions and lower wall portion by Shape is integrally conical under, and the minimum diameter of the upper wall portions is greater than the maximum gauge of the lower wall portion, the two is by one The connecting tube of trapezoidal shape is connected.

6. a kind of high-precision pipetting tip according to claim 1, it is characterised in that: the upper end opening and the shifting Gasket seal is equipped on liquid device between pipette axis.