The invention relates to an actuation device for a flap mounted moveably on a component between a closed position and an opened position, in particular for a flap mounted moveably on a housing of an automobile, comprising: a first actuation part and a second actuation part which are designed to engage with one another in a movement direction, locking means with a locking reception provided on the first or second actuation part and a locking element provided on the other of the first or second actuation part, wherein the locking element engages in the locking reception during engagement of the actuation parts and thus holds the actuation parts together in a locking position, wherein the locking reception has sufficient size so that in the locking position a relative movement between the locking element and the locking reception in the movement direction of the actuation parts and thereby a corresponding relative movement of the actuation parts in their movement direction with regard to one another is possible, and a sensor device which is designed to detect a relative movement between the locking element and the locking reception in the movement direction in the locking position.