Blocking device for electric hoover

摘要

A blocking device is provided for the electric vacuum cleaner having an impurities tank (1) with an inlet opening (2) fitted with a bush (3) to air-tightly fasten the hose end (4), and a filtration receptacle (12), placed inside the impurities tank (1), fitted with a stiff plate (11) with an opening (19) which serves to fix this receptacle on the inner end of the bush (3). The blocking device has a slidable diaphragm (9) which covers the inlet opening (2) of the impurities tank (1) to make it impossible to fix the hose end (4) in the bush (3) if the plate (11) of the filtration receptacle (12) is not correctly installed on the inner end of the bush (3). The correct installing of the filtration receptacle (12) makes the diaphragm (9) move and the inlet opening (2) to be uncovered, which makes it possible to fix the hose end (4) in the bush (3) of the inlet opening (2).