Patent ID: 8316512
Filing Date: 2012-11-27
Classification: A42B,Y10T

Abstract:
1. Locking device ( 2 ) for fixation of the position of an outer layer ( 4 ) relative to an inner layer ( 6 ), of a protective helmet ( 3 ), the outer layer is displaceable, relative to the inner layer during an oblique impact towards the protective helmet, characterized in that the locking device ( 2 ) comprises a layer-guiding member ( 10 ), that has an upper portion ( 12 ), which upper portion ( 12 ) is intended to be arranged in an opening ( 13 ) in the outer layer ( 4 ), and a resilient lower portion ( 16 ), extending from the upper portion ( 12 ), that in its free end ( 17 ) is arranged in connection to the inner layer ( 6 ), whereby the upper portion ( 12 ) is arranged in a first position (P 1 ) relative to the inner layer ( 6 ), in such a way that the outer layer ( 4 ) is fixed in position relative to the inner layer ( 6 ) in an unloaded condition, or during insignificant load on the protective helmet, the locking device ( 2 ) is arranged such that the fixed position ends when exceeding a certain load towards the protective helmet, owing to that the lower portion ( 16 ) of the layer-guiding member ( 10 ) can be elastic in its longitudinal direction (L) and in the direction of propagation plane (P) of the inner layer and the outer layer ( 4 , 6 ), whereby the upper portion ( 12 ) of the locking device ( 2 ) can be moved to a second position (P 2 ) relative to the inner layer ( 6 ), during displacement of the outer layer ( 4 ) relative to the inner layer ( 6 ), and that the locking device comprises a display member that indicates when displacement has taken place to the second position (p 2 ).