The present invention concerns a portable electronic apparatus, such as a mobile phone, having an upper part being moveable in relation to a lower part of the apparatus. The movement of the upper part may both be a sliding and a tilting movement. The sliding movement is controlled by means of a sleeve and a guide placed in the upper part of the apparatus. The sleeve is connected to the lower partby means of pair of links at opposite sides of the apparatus. The links are received at opposite ends of each sleeve at fulcrums at the sleeve and lower part, respectively. The links are designed andpositioned to give self-locking in at least two of three distinct positions of the upper part of the portable electronic apparatus in relation to the lower part of the apparatus.