Abstract: A slide track (6) interacts with a slide (8) arranged on a connecting rod (7), the slide track being arranged on one of the elements (1, 2, 3) and the connecting rod being articulated on the other element. As a result, two positions of the elements are determinable with respect to each other, one of them being defined by a catch. The slide track (6) has an elongated guide track (12) and a flexible strip (11). The catch is designed as a catch recess (9), which is located at the one end of the guide track (12). The other end of the guide track (12) forms with the flexible strip (11) a slit which can be varied in its width by elastic deformation of the strip (11), brought about by the slide (8). The guide track is preferably designed as a rising surface (12), which together with a lower strip (13) forms a clasp-shaped central part (14). An elongated basic strip runs under the guide track ( 12) and also the catch recess (9) to an outlet from the element.