Mechanical lockings of floor panels and a tongue blank

A set of floor panels comprising a locking system, the locking system comprising a displaceable tongue in a displacement groove in a first edge of a first floor panel of the set of floor panels, cooperating with a tongue groove in an adjacent second edge of a second floor panel of the set of floor panels for vertical locking of the first and second edges,

• the locking system further comprises a locking strip including a locking element in one of the first and second edges which cooperates, for horizontal locking of the first and second edges, with a locking groove in the other of the first and second edges,
• the displaceable tongue comprises a protrusion and the displacement groove comprises a cavity, and the protrusion is slideable against a wall of the cavity during locking from a first location along the first and second edges to a second location along the first and second edges to obtain a displacement of the displaceable tongue in a first direction perpendicular to the first and second edges and thereby obtain the vertical locking of the first and second edges,
• wherein the protrusion is located on a lower and/or upper part of the displaceable tongue.