Improved structure of pipette tip

Abstract

The invention belongs to the field of experimental equipment and relates to an improved structure of a pipette tip. The improved structure comprises a pipette tip body, wherein the pipette tip body comprises a pipette inserting zone, a liquid accommodating zone and a suction nozzle zone from top to bottom; a first sealing ring and a second sealing ring which are arranged in an upper-and-lower manner are arranged on the inner surface of the lower part of the pipette inserting zone; an air accommodating zone is arranged between the liquid accommodating zone and the pipette inserting zone; the top end of the pipette inserting zone extends out of an external functional ring for facilitating dismounting of the pipette tip. The pipette tip is good in sealing performance, can be connected with and dismounted from a pipette easily, can effectively prevent a liquid from entering the pipette without affecting the correct measuring amount of the liquid and is simple in technology, high in strength and low in cost, and a filter element is not required to be arranged.

Description

technical field [0001] The invention belongs to the field of experimental equipment, and relates to equipment for pipetting, in particular to an improved structure of a pipette tip. Background technique [0002] Pipette tip is a kind of consumable that is widely used in medical, biological, chemical and other fields. It is used with pipette gun to quantitatively measure liquid. However, there are certain problems in the connection between the existing pipette tip and the pipette gun, for example: 1. The sealing is not good enough, liquid leakage occurs, and the accuracy is poor, which affects the experimental results; The gun is tightly locked, press the pipette head with your hand and press it hard or put the pipette into the pipette head, and stamp it hard, which will cause serious wear and tear of the pipette gun, and the former will also cause cross-contamination ; 3. When removing the pipette tip, it cannot be removed only by the thrust of the pipette gun. It needs to ...

AI Technical Summary

Problems solved by technology

However, although this pipette tip solves the problem of difficult insertion and removal of the pipette, the problem of liquid leakage will still occur because the protrusion will affect the sealing performance. Inhaled into the pipette gun, causing cross-contamination. Another example is the Chinese patent CN102921482, which disclosed a pipette tip structure with a filter element on February 13, 2013. Although it can effectively prevent liquid from entering the pipetting chamber , but in actual operation, the filter element is easy to be in contact with the liquid surface, especially when absorbing the liquid with the largest capacity, so that the filter element will touch the liquid, thereby absorbing the liquid, reducing the original amount of liquid, making the measured liquid Too little will affect the experimental results; the setting of the filter element will more or less affect the smooth absorption of liquid

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