SAMPLING NOZZLE, AUTOMATED ANALYZER USING SAME, AND SAMPLING NOZZLE MANUFACTURING METHOD

摘要

An object of the present invention is to provide a CTS nozzle having functions of: reducing rubber chips produced when the CTS nozzle is inserted into and extracted from a rubber plug; further inhibiting the wear of the tip of the CTS nozzle; and withstanding the repeated use thereof, the CTS nozzle piercing the rubber plug of a sample container and dispensing a sample therein. Since the CTS nozzle of the invention has two cut surfaces at its tip, the pressure applied from the rubber when the nozzle is inserted into the rubber plug is dispersed onto the two cut surfaces without being deflected onto one of the cut surfaces. A tip-side tapered portion 504 (a second surface), which is one of the two cut surfaces, has at a local position of the tip of the nozzle a curved surface that is curved in the circumferential direction of a cylindrically-shaped portion and is tilted linearly lengthwise of the nozzle. The pressure applied to the nozzle due to the resilience of the rubber pushed away by the nozzle is thus dispersed. Consequently, it becomes easier to push away the cut rubber while stably inhibiting the oblique insertion of the nozzle. Moreover, the invention makes it possible to reduce the rubber chips produced by the friction between the cut surfaces of the nozzle and the rubber. As a result of the reduced friction against the rubber, the wear of the tip of the nozzle is minimized, which enables the life of the nozzle to be longer.