CN201105224Y - a pipette - Google Patents

Abstract

A pipette includes a pipette body with a port on its upper end, a through hole is opened on the side wall of the upper part of the pipette body or a tube body with a through hole is opened on the upper end of the pipette body. Because the utility model opens a through hole on the side wall of the upper part of the existing pipette body or covers a section of pipe body with a through hole on the upper end of the existing pipette, so that the air intake of the pipette is even, and when in use When the liquid level is close to the scale line, you can use your index finger to cover the port of the pipette liquid, put your ring finger or index finger or middle finger near the through hole, but do not cover the small hole, let the liquid level drop slowly until the liquid level drops to the scale Quickly cover the through hole with your ring finger, index finger or middle finger when drawing the line, so as to achieve the precision of pipetting and dosing.

Description

a pipette

technical field

The utility model relates to a chemical experiment instrument, in particular to a pipette which can conveniently control liquid discharge.

Background technique

The pipette is a very commonly used chemical experiment instrument, which is widely used in the laboratories of schools, factories and research institutes. Existing pipettes control the amount of air entering the pipette by adjusting the size of the gap between the finger and the pipette, so as to achieve the purpose of controlling the liquid level in the tube. Because the gap between the finger and the pipette is generally crescent-shaped, it is difficult to control the amount of air intake, and it is not easy to maintain a constant speed (too fast or too slow) for the liquid level to drop, and it is difficult to make the liquid level stop accurately. At the scale line, the amount of liquid released is either too much or too little, which makes it difficult for the operator to grasp, and it is difficult for even a skilled person to guarantee a success. This will not only waste a lot of time and medicines for the operator, but also affect the accuracy of the experiment.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned shortcoming of prior art, provide a kind of simple in structure, simple in operation, easy to control, the pipette of uniform air intake.

In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: comprise the pipette body that is provided with the port on the upper end, offer a through hole on the side wall of the upper part of the pipette body or set a cover on the upper end of the pipette body There is a through-hole tube body.

The through hole of the present invention is opened at a distance of 0.1cm-10cm from the uppermost end of the pipette body 2, and the diameter of the through hole is 0.001mm-5mm.

Because the utility model opens a through hole on the side wall of the upper part of the existing pipette body or puts a section of pipe body with a through hole on the upper end of the existing pipette, so that the air intake of the pipette is even, and when in use When the liquid level is close to the scale line, you can use your index finger to cover the port of the pipette liquid, put your ring finger or index finger or middle finger near the through hole, but do not cover the small hole, let the liquid level drop slowly until the liquid level drops to the scale Quickly cover the through hole with your ring finger, index finger or middle finger when drawing the line, so as to achieve the accuracy of pipetting and dosing.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic structural view of Embodiment 2 of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Embodiment 1, referring to Fig. 1, the utility model comprises the pipette body 2 that upper end is provided with port 1, offers a through hole 3 on the side wall of the top of pipette body 2, and this through hole 3 openings are at a distance from The diameter of the through hole is 0.001mm-5mm at the top 0.1cm-10cm of the pipette body 2 .

Embodiment 2, referring to Fig. 2, the utility model comprises the pipette body 2 that is provided with port 1 on the upper end, is provided with through-hole 3 pipe body 4 in the upper end cover of pipette body 2, and this through-hole 3 perforates at a distance The diameter of the through hole is 0.001mm-5mm at the top 0.1cm-10cm of the pipette body 2 .

The liquid suction operation of the utility model is the same as that of the current pipette. The through hole 3 can be covered or not covered when the liquid is suctioned, because the air intake of the through hole is very small, which will not affect the liquid suction. The operation is also the same. When the liquid level is close to the scale line, you can cover the nozzle with the index finger of your left hand, and place the ring finger, index finger or middle finger near the through hole 3, but do not cover the through hole 3, and let the liquid level drop slowly. The hole 3 is very small, and the air intake is also very small, so the liquid level drops slowly. When the liquid level drops to the scale line, quickly cover the through hole 3 with your ring finger, index finger or middle finger, so as to achieve accurate pipetting and liquid addition. Spend. The rest of the operations are the same as the current pipette operation.

Claims (2)

1. A pipette, comprising a pipette body (2) with a port (1) on the upper end, characterized in that: a through hole (3) is provided on the upper side wall of the pipette body (2) Or the upper end of the pipette body (2) is provided with a through hole (3) tube body (4). 2. The pipette according to claim 1, characterized in that: said through hole (3) is opened at a distance of 0.1cm-10cm from the uppermost end of the pipette body (2), and the diameter of the through hole is 0.001mm -5mm..

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