Mechanical locking of floor panels with a flexible bristle tongue

A building panel having an edge portion provided with a groove, in which a tongue formed as a separate part is received, wherein the tongue comprises at least two bow shaped protrusions at a first long edge of the tongue, wherein the protrusions are arranged bendable in the groove, and wherein a part of the protrusions extends outside the groove.

A building panel having an edge portion provided with a groove, in which a tongue formed as a separate part is received, wherein the tongue comprises at least two bow shaped protrusions at a first long edge of the tongue, wherein the protrusions are arranged bendable in the groove, and wherein the length of each protrusion is larger than the total width of the tongue, whereby the total width is the width of the tongue plus the distance, perpendicular to a length direction of the tongue, from a tongue body to a tip of the protrusion.

A building panel having an edge portion provided with a groove, in which a tongue formed as a separate part is received, wherein the tongue comprises at least two bow shaped protrusions at a first long edge of the tongue, wherein the protrusions are arranged bendable in the groove, and wherein a force to compress the tongue 1 mm in a width direction per 100 mm length of the tongue is about 20 to about 30 N.

A building panel having an edge portion provided with a groove, in which a tongue formed as a separate part is received, wherein the tongue comprises at least two bow shaped protrusions at a first long edge of the tongue, the protrusions are arranged bendable in the groove, and wherein a vertical protrusion is arranged at the upper side and/or at the lower side of at least one of the protrusions.