Abstract: A safety device 1 includes a telescopic tubular body 2 with an axial space which is bounded by an outer casing 3 and through which an extending part 4 is axially movable. The outer casing 3 and the extending part 4 are adjustable relative to each other between a relatively compact starting position and at least one extended position. At least one blocking body 7 is provided in the space between the outer casing 3 and the extending part 4 which blocks a movement of the extending part 4 into the outer casing 3, while the at least one blocking body 7 allows a reverse movement of the extending part out of the outer casing.

Abstract: A safety device 1 includes a telescopic tubular body 2 with an axial space which is bounded by an outer casing 3 and through which an extending part 4 is axially movable. The outer casing 3 and the extending part 4 are adjustable relative to each other between a relatively compact starting position and at least one extended position. At least one blocking body 7 is provided in the space between the outer casing 3 and the extending part 4 which blocks a movement of the extending part 4 into the outer casing 3, while the at least one blocking body 7 allows a reverse movement of the extending part out of the outer casing.