Fastener device having a winding element

A fastener device, having a first fastener part and a second fastener part which can be mounted on one another along a closing direction, are held against one another in a closed position, and are releasable from one another in order to open the fastener device,

• wherein the second fastener part has an actuating element with a first engagement means and has a winding element which is arranged on the actuating element and which is rotatable in a winding direction in order to wind up a tension element and which has a second engagement means, wherein the first engagement means and the second engagement means, in a release position, are not in engagement with one another, such that the winding element is rotatable relative to the actuating element, and can be placed in engagement with one another, such that, in an engagement position, the winding element is rotatable by means of the actuating element, wherein the first fastener part has a first toothing means and the second fastener part has a second toothing means, and the first toothing means and the second toothing means, in the closed position of the fastener device, are in engagement with one another such that the first fastener part and the second fastener part are held in positive locking fashion relative to one another along the winding direction, wherein the first fastener part and the second fastener part are, in the closed position, mechanically detained together in order to hold the fastener parts against one another counter to the closing direction, wherein one of the first and second fastener parts has a detent means with at least one movable detent element which, in a detained position, engages into a detent recess of the other fastener part of the first and second fastener parts and thus holds the first and second fastener parts against one another counter to the closing direction.