| 摘要 |
An assembly of a protected stopper with a test tube consists of a protected stopper for blood sample collecting or biological liquids handling test tubes which contains a substantially cylindrical inner body made of an elastomer, the body including a lower portion for insertion in a test tube, an upper abutment flange, and an abutment step formed between the inner body lower portion and the upper flange. The stopper also includes a substantially cylindrical cover made of a plastic for enclosing an upper part of the test tube and the inner body, the cylindrical cover including a free upper region for insertion of a sampling needle in the stopper and arc-like openings provided in the upper part. The engaging means provided in the cylindrical cover for engaging the inner body are constituted by arc-like protrusions which protrude from the inner wall of cylindrical cover which surrounds the lower portion of the inner body and couple with the abutment step, the protrusions being in an angular position which corresponds to the arc-like openings, a plan area of each one of the protrusions being entirely contained within a plan area of corresponding ones of the openings. The thickness of the cylindrical cover should preferably be 0.055-5.5 mm.
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