Toshiba Tec Kabushiki Kaisha

Yasuhiro Ohtsu

Mitsuru Watanabe

Masatoshi Tanaka

Yukio Machida

Yuji Otsuka

Shuhei Omoto

An electric vacuum cleaner includes a first dust separation device configured to separate sucked dust, a first dust collection section for collecting the separated dust, a second dust separation device configured to separate the dust, a dust removing device configured to remove the dust adhering to the second dust separation device, a second dust collection section for accumulating the removed dust, a partition wall for zoning the first dust collection section and the second dust collection section and an introduction opening for introducing the removed dust into the second dust collection section; the partition wall includes a communication opening for communicating the first dust collection section to the second dust collection section and an opening and closing member for closing either of the introduction opening or the communication opening and switching the closing to the other by rotating, and the opening and closing member closes the introduction opening with a negative pressure by an electric fan and closes the communication opening by its own weight when the electric fan is not driven.

Electric vacuum cleaner

Catching grooves () extending in the axial direction are formed in the cylindrical outer surface of a brush base () that has a slender, substantially cylindrical shape and made of a twistable material. Brush attaching portions () of brush members () and blade attaching portions () of scraping members () are respectively secured in the catching grooves () so that axially aligned bristles () of each brush member () and an axially extending blade () of each scraping member () project from the cylindrical outer surface of the brush base (). Receiving members () are respectively fitted to both ends of a shaft () inserted through a shaft insertion hole () of the brush base (). By rotating the receiving members () in opposite directions, the brush base () is twisted in a spiral and secured. By eliminating the necessity of forming the brush base () in a twisted shape beforehand by means of twist extrusion molding, the invention facilitates production of the brush base (). Adjusting the degree of twisting the brush base () ensures a sufficient twisting precision.

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Kanagawa, Japan

Yasuhiro Ohtsu