Helmet

Abstract

The invention relates to a helmet having an outer shell with an apex and having an inner envelope demarcated by a lower edge, the helmet further comprising an internal structure arranged within the inner envelope, the internal structure including a plurality of ribs, each rib extending from the apex to the lower edge.

1 . A helmet comprising:
 an outer shell comprising:
 an apex; 
 a lower edge; and 
 an inner envelope demarcated by the lower edge; 
   an internal structure positioned within the inner envelope of the outer shell;   the internal structure comprising a plurality of ribs, each of the plurality of ribs extending between the apex to the lower edge; and   a bonding layer irremovably securing the internal structure to the outer shell.   
     
     
         2 . A helmet according to  claim 1 , wherein:
 the bonding layer is an injected bonding layer.   
     
     
         3 . A helmet according to  claim 1 , wherein:
 the plurality of ribs includes a pair of laterally successive and spaced-apart pair of ribs; and   the bonding layer binds together at least the pair of laterally successive and spaced-apart pair of ribs.   
     
     
         4 . A helmet according to  claim 1 , wherein:
 the bonding layer has, at least in a transverse cross section of the helmet, a height less than a height of the ribs.   
     
     
         5 . A helmet according to  claim 1 , wherein:
 the bonding layer and the ribs are made of respectively different materials.   
     
     
         6 . A helmet according to  claim 1 , wherein:
 the bonding layer and at least some the plurality of ribs are made of materials having respectively different densities.   
     
     
         7 . A helmet according to  claim 1 , wherein:
 the plurality of ribs and/or the bonding layer are made of EPP or EPS.   
     
     
         8 . A helmet according to  claim 1 , wherein:
 the plurality of ribs is made of a material having a density between 60 and 60 g/l.   
     
     
         9 . A helmet according to  claim 1 , wherein:
 the bonding layer is made of a material having a density between 10 and 100 g/l.   
     
     
         10 . A helmet according to  claim 1 , wherein:
 all of the plurality of ribs do not have an identical density and/or are not made of an identical material.   
     
     
         11 . A helmet according to  claim 10 , wherein:
 each of at least some of the plurality of ribs has a surface having a shape of the inner envelope of the outer shell, each of the surfaces extending along a meridian extending through the apex.   
     
     
         12 . A helmet according to  claim 1 , wherein:
 each of at some of the plurality of ribs has a thickness (e) less than or equal to its height.   
     
     
         13 . A helmet according to  claim 1 , wherein:
 at least one of the plurality of ribs has an inner profile designed to face a head of a wearer in a use position when the helmet is worn by the wearer;   the inner profile comprises a plurality of cutouts extending between the apex and the lower edge of the outer shell.   
     
     
         14 . A helmet according to  claim 1 , wherein:
 the internal structure comprises an assembly of separate pieces, each of the plurality of ribs forming a separate one of the pieces.   
     
     
         15 . A helmet according to  claim 1 , wherein:
 each of the plurality of ribs has a first end and a second end;   the first end is arranged at the apex of the outer shell; and   a connecting strip interconnects all of the second ends.   
     
     
         16 . A helmet according to  claim 1 , wherein:
 each of the plurality of ribs has a respective free surface designed to face and to be engageable with a head of a wearer in a use position of the helmet when the helmet is worn by the wearer.   
     
     
         17 . A helmet according to  claim 16 , wherein:
 the internal structure is an innermost structure of the helmet.   
     
     
         18 . A helmet according to  claim 1 , wherein:
 each of the plurality of ribs has a respective free surface designed to face a head of a wearer in a use position of the helmet when the helmet is worn by the wearer; and   no additional structure of the helmet extends laterally across the free surfaces of the plurality of ribs at respective lengthwise intermediate portions of the plurality of ribs.   
     
     
         19 . A helmet according to  claim 1 , wherein:
 each of at least some of the plurality of ribs has a height that varies between the apex and the lower edge.   
     
     
         20 . A helmet according to  claim 1 , wherein:
 each of at least some of the plurality of ribs has a greatest height at a lengthwise intermediate portion between the apex and the lower edge.