A attachment
system is formed by a primary device (20, 30, 50, 60, 70, 80, 90) and a secondary device (40) connected to the primary device (20, 30, 50, 60, 70, 80, 90) in a pivoting manner. The primary device (20, 30, 50, 60, 70, 80, 90) has a main body, two lateral sides (27, 62, 71, 88, 91) and a bar (51, 52, 63, 73) for attaching the primary device (20, 30, 50, 60, 70, 80, 90) to another object. Each of the lateral sides (27, 62, 71, 88, 91) has a protrusion (29, 59, 69, 79, 89, 99) extending laterally outward from the lateral sides (27, 62, 71, 88, 91). The secondary device (40) has two lateral sides (42), each equipped with an aperture (43) that corresponds to one of the protrusions (29, 59, 69, 79, 89, 99) on the primary device (20, 30, 50, 60, 70, 80, 90), so that fitting the protrusions (29, 59, 69, 79, 89, 99) into the apertures (43) pivotally connects the primary device (20, 30, 50, 60, 70, 80, 90) to the secondary device (40), with the lateral sides (42) of the secondary device being disposed outside of the lateral sides (27, 62, 71, 88, 91) of the primary device (20, 30, 50, 60, 70, 80, 90). The secondary device (40) can be pivoted between a folded position where the secondary device (40) lies against the primary device (20, 30, 50, 60, 70, 80, 90), and an open position where the secondary device (40) is raised up.