| 摘要 |
A telescopic rod (100,200,300,400,500) in order to use objects or tools (80) at a desired height above the head of a user, in particular for harvesting fruit from trees or for pruning tree branches or painting high walls or ceilings, comprises a rod base (10) with a base end (11), a rod extension (20) slidingly engaging with the rod base (10), a support member (23) configured to support a tool (80), arranged at a support end (21) of the rod extension (20) opposite to the rod base (10), an actuation means (50) to automatically push/pull the rod extension (20) with respect to the rod base (10), a rod actuation command (12) at said base end to operate the actuation means (50) between a push position, in which the actuation means (50) pushes said rod extension (20) to elongate said rod, a pull position, in which the actuation means (50) pulls the rod extension (20) to shorten the rod, a standby position in which the actuation means (50) is inoperative and the rod can be used at a desired rod length to manoeuvre the tool (80) at a desired height. The telescopic rod allows raising/lowering the objects, in particular the tools,very quickly, and does not require to lay the rod on a plane for changing the length of the rod. An actuation unit (50) comprises: a nut element (30) integral to said rod extension (20), and a longitudinal screw member (40) that pivotally engages with said rod base (10); a motor means that causes said screw member (40) to rotate upon operation by said rod actuation command. The nut element (30) is arranged to slide within said rod base (10) and to engage with said screw member (40) in such a way that upon rotation of said screw member (40) said rod extension (20) slides within said rod base (10), and wherein said rod base (10) has a longitudinal channel (13) in which said screw member (40) engages with play, wherein said longitudinal channel (13) has a polygonal shaped cross-section. |
