| 摘要 |
The invention relates to a longitudinal-adjustable pipe apparatus for a cleaning device (10), comprising at least one first pipe (46), one second pipe (48), one third pipe (52), wherein the first pipe (46) is guided in the second pipe (48) in a longitudinal-adjustable manner and the second pipe (48) is guided in the third pipe (52) in a longitudinal-adjustable manner, a first locking apparatus (240), which acts between the first pipe (46) and the second pipe (48), wherein, in a releasable locking position of the first locking apparatus (240), the first pipe (46) is fixed to the second pipe (48) in respect of a longitudinal adjustability, a second locking apparatus (242), which acts between the second pipe (48) and the third pipe (52), wherein, in a releasable locking position of the second locking apparatus (242), the second pipe (48) is fixed to the third pipe (52) in respect of a longitudinal adjustability, and a third locking apparatus (244), which acts on the first pipe (46), the second pipe (48), and the third pipe (52), wherein the third locking apparatus (244) has a releasable locking position, in which the second pipe (48) is fixed to the third pipe (52) in respect of a longitudinal adjustability, and has a locking position, in which a longitudinal adjustment of the second pipe (48) to the third pipe (52) is released, wherein the third locking apparatus (244) is controlled, in respect of the transition from the locking position to the unlocking position, by a position of the first pipe (46) relative to the second pipe (48) and/or by a force by means of which the third locking apparatus (244) acts on the second pipe (48). |
