Helmet
Helmet ( 1 ) comprising a first protective collapsible portion ( 2 ), a second protective collapsible portion ( 4 ), and at least one energy absorbing pad ( 3 ) permeable to air arranged between said first and second protective collapsible portions ( 2,4 ), wherein the first collapsible portion ( 2 ) and the second collapsible portion ( 4 ) are coupled to each other through one or more mechanical couplings ( 11 - 16 ).
1 . A helmet comprising:
a first protective collapsible layer,
a second protective collapsible layer, and
at least one energy absorbing pad permeable to air arranged between said first and second protective collapsible layers, wherein each of the at least one energy absorbing pad comprises a plurality of cells connected to each other to form an array of energy absorbing cells,
wherein the first protective collapsible layer and the second protective collapsible layer are coupled to each other;
wherein at least one cavity is formed in a portion of an inner side of the first protective layer for accommodating said at least one energy absorbing pad, so that the at least one energy absorbing pad is entirely accommodated only in the corresponding at least one cavity of the first protective collapsible layer;
wherein said first collapsible protective layer and said second protective collapsible layer are configured to fit each other;
wherein the second protective collapsible layer is dome-shaped and an additional portion of the inner side of the first protective collapsible layer, outside the cavity is shaped to mate with the second protective collapsible layer; and
wherein a low friction layer/coating is applied at a separation surface between the first protective collapsible layer and the second protective collapsible layer, such that the second protective collapsible layer rotates into the first protective collapsible layer like a ball-joint; and wherein one among the first protective collapsible layer and the second protective collapsible layer comprises one or more male elements configured to engage respective one or more female elements of the other one among the first protective collapsible layer and the second protective collapsible layer, whereby a mechanical coupling between the first protective collapsible layer and the second protective collapsible layer is realized by means of the male and female elements.
2 . The helmet according to claim 1 , wherein the first protective collapsible layer is arranged over the second protective collapsible layer.
3 . The helmet according to claim 1 , wherein the first protective collapsible layer and/or the second protective collapsible layer is/are made of a closed-cell polymeric foam.
4 . The helmet according to claim 1 , wherein the first protective collapsible layer and/or the second protective collapsible layer comprise/s a lattice structure.
5 . The helmet according to claim 1 , wherein the at least one energy absorbing pad is enclosed between said first protective collapsible layer and said second protective collapsible layer.
6 . The helmet according to claim 5 , wherein the first protective collapsible layer and/or the second protective collapsible layer is/are shaped so as to entrap and prevent the extraction of the at least one energy absorbing pad from the helmet when the at least one energy absorbing pad is arranged between said first protective collapsible layer and said second protective collapsible layer.
7 . The helmet according to claim 1 , wherein at least a portion of the first protective collapsible layer is protected by a shell connected to said first protective collapsible layer.
8 . The helmet according to claim 1 , wherein said first protective collapsible layer and said second protective collapsible layer comprise one or more vents.
9 . The helmet according to claim 1 , wherein the energy absorbing pad is configured to absorb more energy through deformation than the first protective collapsible layer and/or the second protective collapsible layer.
10 . The helmet according to claim 1 , wherein adjacent cells of the plurality of cells of the at least one energy absorbing pad are bonded to each other via a portion of lateral surfaces.
11 . The helmet according to claim 1 , wherein the low friction layer/coating is also arranged between the first protective collapsible layer and the energy absorbing pad or between the energy absorbing pad and the second protective collapsible layer for allowing a relative movement between them.