| 摘要 |
A self-inflating screening shield, in particular umbrella, has an inflatable envelope (11) made of a flexible material. The interior of the envelope (11) is evacuated prior to use, and by means of a chemical reaction a gaseous substance can be produced therein with which the interior of the envelope (11) is inflated. The chemical reaction may consist in dissolving a sodium (bi)carbonate granulate in citric acid. The citric acid may be accommodated in a container which is made to rupture by pressure being applied externally to the envelope (11) by a user, for example at a predetermined breaking point, or by being torn at a predetermined tearing point, thus triggering the chemical reaction. A self-inflating balloon can also be produced in this way.
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