| 摘要 |
<p>The invention relates a telescopic extension for a vacuum cleaner comprising an internal tube (11), an external tube (12), sliding one inside the other, wherein the internal tube is provided with a row of notches (15) of a preselected shape, appropriately spaced, suitable for receiving a selected element of constraint (22); said element of constraint (22) is provided with an appendix (23) preferably constituted by at least one small plate, with which an element of thrust (30) is capable of coming into contact at least along a line running substantially in the direction of movement of the same element of thrust (30). <IMAGE></p> |
