An apparatus includes a panel swingably mounted relative to a frame, and a locking element supported by a support arrangement. The support arrangement supports the locking element relative to the frame so as to be displaceable between a locked position in which at least part of the locking element is interposed between a pressure surface of the panel and a contact surface of the frame, thereby locking the panel to the frame, and an unlocked position. The support arrangement defines a path of motion of the locking element from an unlocked position to the locked position in which at least a terminal part of the path of motion is in a direction obliquely angled relative to a plane of closure of the panel within the frame.