Pipetting needle and pipetting device

Abstract

The present invention relates to the field of reagent transport, and provides a pipetting needle and pipetting device. The pipetting needle and pipetting device comprises a fixed block, a needle sheath, a needle and an electrode; the fixed block is provided with a fixed block through-hole for putting the needle sheath; fixed block through-hole comprises a first through-hole and a second through-hole; the second through-hole is located on the first through-hole; the needle is vertically fixed on the needle sheath and passed through the first through-hole; the needle sheath is movebly fixed to the second through-hole; the electrode comprises a first needle sheath electrode and a fixed block through-hole electrode; the first needle sheath electrode is arranged on the side of the needle sheath; the fixed block through-hole electrode is arranged on the inner wall of the fixed block, and corresponding to the first needle sheath electrode; and there is gaps between the first needle sheath electrode and the fixed block through-hole electrode, and when collision occurs to the needle, the two electrodes are communicated. According to the pipetting needle and pipetting device disclosed by the present invention, immediate detection of collision occurring to the needle is realized, collision resistance is improved, damage of the pipetting needle and pipetting device is avoided, and a service life of the pipetting needle and pipetting device is prolonged.

Description

technical field [0001] The invention relates to the field of reagent transmission, in particular to a pipetting needle and a pipetting device. Background technique [0002] In the prior art, rapid transport of reagents at any position is often achieved by installing a pipetting needle on the mechanical arm. In order to avoid the phenomenon that the mechanical arm moves inaccurately during operation, causing the pipetting needle to collide with the reagent storage container, thereby damaging the instrument, in the prior art, the needle in the pipetting needle is often fixed by a spring, so that It acts as a buffer after a collision to avoid damage to the equipment. However, this technical solution cannot detect the collision immediately after the collision, and the movement of the pipette needle will not stop. When the movement of the pipette needle exceeds a certain degree, the damage of the instrument is inevitable, and the anti-collision performance bad. The liquid pipe...

AI Technical Summary

Problems solved by technology

[0004] One of the objects of the present invention is to provide a new pipette needle, aiming to solve the problem of immediate detection of the impact on the needle in the prior art

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