Vacuum cleaner or vacuum cleaning robot with a dust collector unit, which has - at least one interlocking unit for releasably fixing the dust collector unit to the vacuum cleaner, - an operating element for operating the interlocking unit and - at least one transfer element for transferring a movement of the operating element to the interlocking unit, wherein the operating element is embodied as a handle for removing the dust collector unit, and wherein the operating element is mounted such that it can pivot between its blocking position and its removal position, wherein the interlocking unit, together with a corresponding counter-unit on the vacuum cleaner or on the vacuum cleaning robot, embodies a motion link, wherein the interlocking unit positions the motion link in an end position when the handle is pivoted into the blocking position, so that a unit acting as a sliding block thus forms a counter-bearing at the end of the motion link, via which the operating element pushes the dust collector unit into an interlocking position when pivoting into the end position of the blocking position, characterised in that the motion link has a curved slot, a web or a curved groove, which corresponds to an oval segment or circle segment, the centre point of which coincides with the pivot axis of the handle when the dust collector unit is inserted into the vacuum cleaner or into the vacuum cleaning robot and is not pulled in the direction of the interlocking position. - at least one interlocking unit for releasably fixing the dust collector unit to the vacuum cleaner, - an operating element for operating the interlocking unit and - at least one transfer element for transferring a movement of the operating element to the interlocking unit, wherein the operating element is embodied as a handle for removing the dust collector unit, and wherein the operating element is mounted such that it can pivot between its blocking position and its removal position, wherein the interlocking unit, together with a corresponding counter-unit on the vacuum cleaner or on the vacuum cleaning robot, embodies a motion link, wherein the interlocking unit positions the motion link in an end position when the handle is pivoted into the blocking position, so that a unit acting as a sliding block thus forms a counter-bearing at the end of the motion link, via which the operating element pushes the dust collector unit into an interlocking position when pivoting into the end position of the blocking position, wherein the operating element is embodied as a handle for removing the dust collector unit, and wherein the operating element is mounted such that it can pivot between its blocking position and its removal position, wherein the interlocking unit, together with a corresponding counter-unit on the vacuum cleaner or on the vacuum cleaning robot, embodies a motion link, wherein the interlocking unit positions the motion link in an end position when the handle is pivoted into the blocking position, so that a unit acting as a sliding block thus forms a counter-bearing at the end of the motion link, via which the operating element pushes the dust collector unit into an interlocking position when pivoting into the end position of the blocking position,