Mechanical locking device for building panels

Abstract

A set of building panels such as floor panels, including similar or essentially identical building panels. Each building panel having a first mechanical locking device configured to horizontally and vertically lock a first edge of a building panel to a second edge of an adjacent building panel, and a second mechanical locking device configured to horizontally and vertically lock a third edge of a building panel to a fourth edge of an adjacent building panel, wherein the first mechanical locking device and/or the second mechanical locking device includes, at one of the first edge or second edge, and/or at one of the third edge or fourth edge, a locking strip extending from a respective edge in a direction away from the respective edge, wherein the locking strip includes a locking element having an impact surface.

1 . A set of building panels comprising similar or essentially identical building panels wherein each building panel comprises a first mechanical locking device configured to horizontally and vertically lock a first edge of a building panel to a second edge of an adjacent building panel, and a second mechanical locking device configured to horizontally and vertically lock a third edge of a building panel to a fourth edge of an adjacent building panel,
 wherein the first edge and the second edge of the building panels are configured to be assembled with the first mechanical locking device by means of a pivoting motion or a snapping motion,   wherein the first mechanical locking device and/or the second mechanical locking device comprises, at one of the first edge or second edge, and/or at one of the third edge or fourth edge, a locking strip extending from a respective edge in a direction away from said respective edge,   wherein the locking strip comprises, at its outermost portion, a locking element extending in a direction perpendicular to the extension of the locking strip,   wherein the locking element is configured to cooperate with a locking groove arranged in the other of the first edge or second edge, and/or in the other of the third edge or fourth edge, such that adjacent building panels are locked in a horizontal direction in an assembled position,   wherein the locking element comprises an impact surface extending from an outer surface of the locking element in a direction towards a back surface of the building panel, at an acute angle (β) in relation to the horizontal plane,   wherein the locking groove comprises an impact surface extending from an inner surface of the locking groove in a direction towards the back surface of the building panel, at an acute angle in relation to the horizontal plane,   wherein a play is arranged between the impact surface of the locking element and the impact surface of the locking groove in an assembled position,   wherein the impact surface of the locking groove is configured to cooperate with the impact surface of the locking element in an assembled position, when a force, acting, at least partially, in a vertical direction, is applied to at least one of the building panels.   
     
     
         2 . The set of building panels according to  claim 1 , wherein the impact surface of the locking element is arranged at the acute angle (β) of between 40° and 70° in relation to the horizontal plane. 
     
     
         3 . The set of building panels according to  claim 1 , wherein the impact surface of the locking groove is arranged at the acute angle (ϕ) of between 40° and 70° in relation to the horizontal plane. 
     
     
         4 . The set of building panels according to  claim 1 , wherein the impact surface of the locking element is essentially parallel to the impact surface of the locking groove. 
     
     
         5 . The set of building panels according to  claim 1 , wherein the impact surface of the locking element is non-parallel to the impact surface of the locking groove. 
     
     
         6 . The set of building panels according to  claim 1 , wherein the third edge and the fourth edge of the building panels are assembled with the second mechanical locking device by means of a vertical displacement. 
     
     
         7 . The set of building panels according to  claim 1 , wherein the building panel has a thickness of between 3 and 8 mm. 
     
     
         8 . The set of building panels according to  claim 1 , wherein the building panel has a thickness of between 3 and 4.5 mm and the impact surface of the locking element is arranged at the acute angle (β) of between 40° and 60° in relation to the horizontal plane. 
     
     
         9 . The set of building panels according to  claim 1 , wherein the building panel has a thickness of between 4.5 and 8 mm and the impact surface of the locking element is arranged at the acute angle (β) of between 40° and 70° in relation to the horizontal plane. 
     
     
         10 . The set of building panels according to  claim 1 , wherein the locking element further comprises a locking surface configured to cooperate with a locking surface of the locking groove in an assembled position. 
     
     
         11 . The set of building panels according to  claim 10 , wherein the locking surface of the locking element and the locking surface of the locking groove are essentially parallel. 
     
     
         12 . The set of building panels according to  claim 10 , wherein the locking surface of the locking element is arranged at an acute angle (α) of between 40° and 60° in relation to the horizontal plane. 
     
     
         13 . The set of building panels according to  claim 1 , wherein the locking groove comprises a chamfer arranged below the impact surface. 
     
     
         14 . The set of building panels according to  claim 13 , wherein the chamfer comprises a surface tilted in a direction down and in towards the rest of the building panel in which it is arranged. 
     
     
         15 . The set of building panels according to  claim 1 , wherein the mechanical locking device further comprises, at one of the first edge or second edge, and/or at one of the third edge or fourth edge, an upper locking tongue extending from respective edge in a direction away from said edge, and configured to be received in and cooperate with an upper tongue groove arranged in the other of the first edge or second edge, and in the other of the third edge or fourth edge. 
     
     
         16 . The set of building panels according to  claim 15 , wherein the height of the upper locking tongue is greater than the height of the upper tongue groove in order to create a tight seal between the adjacent building panels. 
     
     
         17 . The set of building panels according to  claim 16 , wherein the difference between the height of the upper locking tongue and the height of the upper tongue groove is in the range of 0.01 to 0.2 mm. 
     
     
         18 . The set of building panels according to  claim 1 , wherein at least a substrate of the building panel comprises a thermoplastic material. 
     
     
         19 . The set of building panels according to  claim 1 , wherein each building panel comprises a single layered substrate, wherein the impact surface of the locking element and the impact surface of the locking groove are arranged in said substrate. 
     
     
         20 . The set of building panels according to  claim 1 , wherein the building panels are provided with a pre-attached foam layer attached to the back surface of the building panel.