Box comprising main portion and lid portion pivotably connected to main portion

A box comprising

• a main portion having a bottom wall and a side wall;
• a lid portion having a top wall and a side wall, these portions being pivotably connected to each other about an axial direction which lays in the corresponding side walls of these portions;
• at least one recess formed in the side wall of lid portion and extending in said axial direction;
• first and second shafts provided at a lower edge of the side wall of lid portion and extending along said recess, a length of the first shaft being longer than that of the second shaft;
• and
• first and second grooves formed in the side wall of main portion and being aligned in the axial direction, a distance between the first and second grooves being slightly different from a distance between a base of the first shaft and a top of the second shaft;
• whereby the first shaft is first fully inserted into the first recess by relatively moving the main and lid portions in one direction in the axial direction and then these portions are relatively moved in the other direction so as to insert the second shaft into the second groove.