Bar code scanning device and blood cell analyzer thereof

Abstract

Embodiments of the invention disclose a bar code scanning device and a blood cell analyzer thereof. The bar code scanning device comprises: a main support, a bar code scanner, a slide carriage, a cylinder, a pressure head support assembly, a pressure head and an elastic element, wherein the main support is used to connect the bar code scanning device to a host; the bar code scanner is fixedly connected to the main support or the host; the slide carriage is fixedly connected on the main support; the cylinder is fixedly connected to the slide carriage or the main support and the cylinder comprises a cylinder piston rod which is extended out of the cylinder body; the pressure head support assembly is connected with the cylinder piston rod and forms cooperation connection with the slide carriage through a kinematic pair, and a motor is arranged on the pressure head support assembly; the pressure head can be rotatablely connected with the pressure head support assembly and the motor can drive the pressure head to rotate; one end of the elastic element is connected with the pressure head support assembly and the other end is connected with the slide carriage or the main support. In the invention, the elastic element provides a resilience force for the pressure head support assembly and the resilience force can buffer impact of the pressure head to a test tube. When the power is off or gas is off, the scanning device can automatically restore to an original state so that the test tube or a test tube rack can be conveniently to be taken out.

Description

technical field [0001] The invention relates to a blood cell analyzer, in particular to a barcode scanning device in the blood cell analyzer. Background technique [0002] In the automatic sample-injecting blood cell analysis instrument, in order to distinguish each test tube, a barcode is usually attached to the test tube. The blood cell analyzer is equipped with a test tube barcode scanning device to scan and identify the test tube barcodes one by one. However, usually the test tubes are placed arbitrarily in the test tube rack, and the side with the barcode on the test tube is not necessarily facing the barcode scanner of the barcode scanning device. When the barcode on the test tube does not face the barcode scanner, the barcode The scanner will not be able to scan. Therefore, a rotating device is generally provided in the barcode scanning device, and when the barcode of the test tube is not facing the barcode scanner, the test tube is rotated so that the barcode on the...

AI Technical Summary

Problems solved by technology

However, the existing bar code scanning device has the following deficiencies: 1) when a fault occurs and the instrument is powered off and the gas is cut off, if the pressure head is in a downward state at this time, the pressure head will not be able to reset, and will be stuck on or between the test tubes. It makes it difficult to take out the test tube rack; 2) The cylinder descends quickly, which has a large impact on the test tube and corresponding components, and is easy to damage the test tube or test tube rack

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