AUTOMATIC ANALYZER

摘要

An automatic analyzer is capable of controlling the gap between the tip of the sample nozzle and the bottom surface of the reaction container and restricting the sample attached to the tip of the sample nozzle. A movement distance of an arm is calculated and stored while the tip of the sample nozzle contacts a coordinate measurement stand until a stop position detector detects a stop position detection plate. The sample nozzle is moved toward the bottom surface of the reaction container and is stopped at the time when the stop position detector detects the stop position detection plate. The arm is moved upwardly for the movement distance stored in memory from this position. The sample nozzle can be stopped such that the tip of the sample nozzle is contacted to the bottom surface of the reaction container and the bend (warp) of the sample nozzle is restricted.

主权项

1. An automatic analyzer comprising:
a dispensing mechanism including a sample dispensing nozzle for dispensing a sample into a reaction container and a supporting arm for supporting the sample nozzle through an elastic member; a controller for controlling an up down movement and a rotation movement of the supporting arm and for analyzing a sample in the reaction container; a capacitance detector set on the dispensing mechanism, the capacitance detector detecting a change of a capacitance of the sample nozzle; a detection member formed on the sample nozzle; and a stop position detector set on the supporting arm, the stop position detector detecting the detection member, wherein the controller calculates and stores a contact movement distance on the basis of a position of the supporting arm when the capacitance detector detects that a capacitance of the sample nozzle changes more than or equal to a constant value and a position of the supporting member when the stop position detector detects the detection member, moving the sample nozzle downwardly toward the reaction container, stopping a downward movement of the sample nozzle when the stop position detector detects the detection member, moving the supporting arm upwardly for the contact movement distance.