Abstract: A telescopic spring unit with two telescopic parts capable of being shifted, one in relation to the other, along a telescopic axis, which telescopic spring unit, when in its lengthened state, is lockable by means of a locking unit that is arranged on one of the telescopic parts and is pivotable around a tilting joint into a stop position. First and second pivoting elements are provided on the two telescopic parts, respectively, for pivotally connecting the spring unit to an articulated structural assembly. The pivoting elements of the telescopic part connected to the locking unit is attached to the locking unit, and the tilting joint and the pivoting elements are coordinated with one another in a manner such that, in the lengthened state of the telescopic spring unit, a force that acts on the telescopic spring unit through the two pivoting points in the compressive direction exerts a tilting moment on the locking unit which biases the locking unit around the tilting joint towards the stop position.