| 摘要 |
A suction head for a vacuum cleaner is provided with reciprocating means 40 for striking a surface to be cleaned, where the surface is for example bedclothes, the hitting means 40 preventing the fabric from being sucked fully into the head, thus blocking it. The head comprises upper and lower casings 21,22. The lower casing has the usual suction entry, but is also provided with a plurality of sliding holes 124 within which the hitting members 40 can slide up and down. A turbine 31 is mounted in the head and has a camshaft 130 extending laterally from both sides and provided with a series of cams 131. These drive the hitting members up and down. The turbine is driven by a flow of air admitted through an opening 122. In order to cease operation of the hitting members 40 when cleaning a hard floor for example, a slidable shutter 125 is provided to shut off the airflow over the turbine. The cams ca be arranged to thrust the hitting members all simultaneously or in sequence, and if desired, more than once per revolution. A standard hose connection 430 is at the rear of lower casing 22. |
