CN210729571U

CN210729571U - Trace liquid transfer device gun head accessory

Info

Publication number: CN210729571U
Application number: CN201921054516.9U
Authority: CN
Inventors: 新井崇之
Original assignee: MBL Hangzhou Biotech Co Ltd
Current assignee: Enbile (Shenzhen) Biotechnology Co.,Ltd.
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-06-12
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a micropipettor gun head accessory, which comprises a part A, a part B and a part C from top to bottom in sequence, wherein the internal structure of the part A is gradually thinned towards the tail end of the part A, the internal structure of the part B is gradually thickened towards the tail end of the part B, and the internal structure of the part C is gradually thinned towards the tail end of the part C; the part A, the part B and the part C are communicated; the part A is matched with the tail end of the micropipette head, and when the micropipette head is used, the tail end of the micropipette head is inserted into the micropipette head. The utility model discloses only through inserting on current general micropipettor's rifle head (for example, the capacity is 1000 mu L), just can realize simultaneously that the removal of large capacity and meticulous accurate liquid gets the operation. By additionally using the gun head accessory, the standard universal pipettor and the gun head thereof can realize the trace liquid transferring operation, thereby expanding the operation range.

Description

Trace liquid transfer device gun head accessory

Technical Field

The utility model relates to a liquid moves gets technical field, concretely relates to micropipettor rifle head annex.

Background

In the field of biological and chemical industries, a micropipette is commonly used to perform operations of transferring a liquid (pipetting, draining, dispersing, washing, etc.). In particular, in the development and production of diagnostic reagents, the precision of the operation affects the experimental results and product performance, and therefore, it is necessary to be able to perform extremely fine and minute liquid removal operations. However, a typical micropipette has a capacity that can only meet the liquid transfer requirements of a few μ L to 200 μ L. The tips of the micropipettes which can handle the large capacity of 1000-5000 mu L are thick, so that the error is extremely large, and the micropipettes are not suitable for fine and micro liquid transfer operation. In general, the operator often inserts a small volume micropipette into the tip of the micropipette to use the micropipette. However, as shown in FIG. 3, the joint portion of the 2 tips has a gap, and the connection thereof is extremely unstable; further, the liquid flows into the gap of the joint portion, which affects not only the accuracy of liquid suction and discharge but also cross contamination, and thus cannot be continuously used stably in actual operation.

On the other hand, the shape of tips that are used in combination with various micropipettes of different structures and capacities has already been subject to a correspondingly fixed international standard in the industry, and the problems described above cannot be solved by using a universal large-capacity tip.

In summary, the tip attachment can be used in a conventional universal micropipette and a fixed mounting tip thereof, so that a precise and precise transfer operation can be realized when transferring a liquid of hundreds of μ L or more.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a micropipettor rifle head annex to solve prior art not enough.

The utility model adopts the following technical scheme:

a micropipettor tip attachment sequentially comprises a part A, a part B and a part C from top to bottom, wherein the internal structure of the part A is gradually thinned towards the tail end of the part A, the internal structure of the part B is gradually thickened towards the tail end of the part B, and the internal structure of the part C is gradually thinned towards the tail end of the part C; the part A, the part B and the part C are communicated; the part A is matched with the tail end of the micropipette head, and when the micropipette head is used, the tail end of the micropipette head is inserted into the micropipette head.

Further, the length of the part A is 10.0-40.0mm, the length of the part B is 5.0-30.0mm, and the length of the part C is 10.0-35.0 mm.

Furthermore, the external diameter of the top end of the part A is 4.0-6.0mm, the internal diameter is 3.0-5.0mm, and the difference between the external diameter and the internal diameter is 1.0-2.0 mm; the outer diameter of the tail end of the part A is 2.0-6.0mm, the inner diameter is 1.0-3.0mm, and the difference between the outer diameter and the inner diameter is 1.0-5.0 mm.

Furthermore, the outer diameter of the tail end of the part B is 2.0-5.0mm, the inner diameter is 1.5-3.0mm, and the difference between the outer diameter and the inner diameter is 0.5-2.0 mm.

Further, the outer diameter of the end of the C part is 1.0-2.0mm, the inner diameter is 0.7-1.0mm, and the difference between the outer diameter and the inner diameter is 0.3-1.0 mm.

The utility model has the advantages that:

the utility model discloses an install the annex that uses on general micropipettor rifle head, only through inserting on current general micropipettor's rifle head (for example, the capacity is 1000 mu L), just can realize simultaneously that the removal of large capacity and meticulous accurate liquid gets the operation. By using the attachment for the lance tip, the problems of error and cross-contamination due to joint gaps, which are caused by emergency methods (i.e. the comparative example shown in fig. 3) by operators, can be avoided, and thus solved.

By additionally using the attachment for the tip, a standard general-purpose pipette and the tip thereof used for research or production in the fields of biology and chemistry can perform a trace liquid transfer operation, and the operation range thereof can be expanded.

Drawings

Fig. 1 is the structure diagram of the present invention (the left side is the longitudinal section diagram of the present invention, and the right side is the transverse section diagram of the corresponding part).

Fig. 2 is a schematic view of the present invention.

FIG. 3 is a schematic diagram of a comparative example.

Detailed Description

The invention is further explained below with reference to examples and figures. The following examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.

A micropipette tip attachment, as shown in FIG. 1, comprises a part A, a part B and a part C in sequence from top to bottom, wherein the internal structure of the part A is gradually thinned towards the tail end of the part A, the internal structure of the part B is gradually thickened towards the tail end of the part B, and the internal structure of the part C is gradually thinned towards the tail end of the part C; the part A, the part B and the part C are communicated; the part A is matched with the tail end of the micropipette head, and when the micropipette head is used, the tail end of the micropipette head is inserted into the micropipette head.

The specific size of the gun head accessory can be adjusted according to the corresponding size of the gun head. Taking a 1000. mu.L lance tip as an example, the following are illustrated:

the diameter of the front end part of the micropipette is 6-10 mm, the diameter of the micropipette installation part of the applicable 1000-microliter gun head is 8-12 mm, the diameter of the front end part is 1-3 mm, and the total length is 60-100 mm; the attachment of the lance tip is shown in table 1: part A is 10.0-40.0mm long, part B is 5.0-30.0mm long, and part C is 10.0-35.0mm long; the external diameter (D) of the top end of the part A (namely the part shown by the section D-E) is 4.0-6.0mm, the internal diameter (E) is 3.0-5.0mm, and the difference between the external diameter and the internal diameter (D-E) is 1.0-2.0 mm; the outer diameter (F) at the end of the part A (i.e. the part shown by the section F-G) is 2.0-6.0mm, the inner diameter (G) is 1.0-3.0mm, and the difference between the outer diameter and the inner diameter (F-G) is 1.0-5.0 mm; the outer diameter (H) of the tail end of the part B (namely the part shown by the section H-I) is 2.0-5.0mm, the inner diameter (I) is 1.5-3.0mm, and the difference between the outer diameter and the inner diameter (H-I) is 0.5-2.0 mm; the outer diameter (J) of the end of the C part (i.e., the part shown by the section J-K) is 1.0-2.0mm, the inner diameter (K) is 0.7-1.0mm, and the difference between the outer diameter and the inner diameter (J-K) is 0.3-1.0 mm.

TABLE 1

	mm
		A	10.0-40.0
B	5.0-30.0
		C	10.0-35.0
D	4.0-6.0
		E	3.0-5.0
D-E	1.0-2.0
		F	2.0-6.0
G	1.0-3.0
		F-G	1.0-5.0
H	2.0-5.0
		I	1.5-3.0
H-I	0.5-2.0
		J	1.0-2.0
K	0.7-1.0
		J-K	0.3-1.0

The accessory material meets the general requirement of drug resistance (pH and organic solvent resistance) when used in the fields of biology and chemistry, and can not adsorb substances with negative charges such as protein; such as polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, acrylic resins, polycarbonate, polyether ketone, and the like.

As shown in fig. 2, the use process of the gun head accessory is as follows:

1. and (4) mounting the matched gun head on a micropipettor.

2. The gun head accessory is arranged at the tail end of the matched gun head.

3. The liquid is removed according to the general operation guidance of the micropipette.

Claims

1. A micropipettor tip attachment is characterized by sequentially comprising a part A, a part B and a part C from top to bottom, wherein the internal structure of the part A is gradually thinned towards the tail end of the part A, the internal structure of the part B is gradually thickened towards the tail end of the part B, and the internal structure of the part C is gradually thinned towards the tail end of the part C; the part A, the part B and the part C are communicated; the part A is matched with the tail end of the micropipette head, and when the micropipette head is used, the tail end of the micropipette head is inserted into the micropipette head.

2. A micropipette tip attachment according to claim 1, wherein part a is 10.0-40.0mm long, part B is 5.0-30.0mm long and part C is 10.0-35.0mm long.

3. A micropipette tip attachment according to claim 2, wherein the part a has an external diameter of 4.0 to 6.0mm at its tip end, an internal diameter of 3.0 to 5.0mm, and a difference between the external diameter and the internal diameter of 1.0 to 2.0 mm; the outer diameter of the tail end of the part A is 2.0-6.0mm, the inner diameter is 1.0-3.0mm, and the difference between the outer diameter and the inner diameter is 1.0-5.0 mm.

4. A micropipette tip attachment according to claim 2, wherein the tip of part B has an external diameter of from 2.0 to 5.0mm, an internal diameter of from 1.5 to 3.0mm and a difference between the external and internal diameters of from 0.5 to 2.0 mm.

5. A micropipette tip attachment according to claim 2, wherein the tip of the part C has an external diameter of 1.0 to 2.0mm, an internal diameter of 0.7 to 1.0mm and a difference between the external diameter and the internal diameter of 0.3 to 1.0 mm.