Puncture sampling device and in-vitro detection analyzer

Abstract

The invention relates to a puncture sampling device and an in-vitro detection analyzer. The puncture sampling device comprises a puncture mechanism, a sampling mechanism and a driving mechanism. The puncture mechanism comprises a puncture needle, a first through hole is formed in the puncture needle, the puncture needle is used for puncturing a container cover of A sample container, the sampling mechanism comprises a sampling needle, the sampling needle is used for penetrating through the first through hole and extending into the sample container to sample, the driving mechanism comprises a vertical driving mechanism, and the vertical driving mechanism can drive the puncture needle to move in the axial direction of the sample container to puncture the container cover and can drive the sampling needle to move in the axial direction of the sample container to penetrate through the first through hole to enter the sample container to sample. According to the puncture sampling device, the service life of the sampling needle can be prolonged, pollution to the sampling needle is reduced, and the sampling precision and the sampling success rate can be guaranteed.

Description

technical field [0001] The invention relates to the field of in vitro detection medical devices, in particular to a puncture sampling device and an in vitro detection analyzer equipped with the puncture sampling device. Background technique [0002] At present, when samples are sampled and analyzed, a sampling needle is usually used to puncture the container cover of the sample container and then enter the inside of the sample container for sampling. [0003] Patent document CN202547978U discloses a puncture sampling machine, which discloses that a single sampling needle is used to puncture the container cover of the sample container and enter the sample container for sampling. [0004] Patent document CN106443037A discloses an automatic blood sampling instrument, which discloses that multiple sampling needles are used to enter the sample container to realize multi-channel sampling. Wherein, each sampling needle needs to puncture the container cover of the sample container ...

AI Technical Summary

Problems solved by technology

[0006] (1) When the sampling needle pierces the container cover (usually a rubber cover) of the sample container, the sampling needle and the container cover will have repeated contact friction, which will reduce the service life of the sampling needle; Prolonging the service life of the sampling needle by changing the wall thickness will affect the sampling accuracy of the sampling device, which will have a greater impact on the final test result (especially when the sampling volume is small)

[0007] (2) The contact distance between the sampling needle and the container cover is longer, and the contamination length of the sampling needle is longer, which leads to increased cleaning difficulty and increased probability of cross-contamination;

[0008] (3) The general sampling device has the function of liquid level detection. When the sampling needle is in rigid contact with the container cover, the capacitive liquid level detection device may touch the sample liquid on the container cover and give a wrong judgment, making Sampling error rate increases

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