| 摘要 |
The needle assembly consists of a plastic cannula (11) with a hollow hub (12) at its dital end, a steel needle (16) adapted for insertion into the plastic cannula (11) and having a ground tip (17) and a needle head (15) adapted for being detachably coupled with the hollow hub (12), and of a tube-like protecting cap for the elongated parts. According to the inventon the protecting cap (22) has a closed, thick-walled bottom (23) into which the ground tip (17) of the steel needle (16) is clampingly pierceable, thus providing a reliable connection between these two parts. The steel needle (16) can be thrown into the commonly used waste containers without the protecting cap (22) falling off.
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