Protective helmet

Abstract

A protective helmet comprises an external protective cap having a protective shell positioned therein, a protective internal liner positioned at least partially inside the protective shell to contact a user's head. A first portion of the internal liner partially surrounds the user's skull, and second and third portions at least partially protect left and right lateral portions of the user's face, each portion independently detachable from the protective shell. The second and third portions are each provided with first magnetic coupling means that cooperate with corresponding second magnetic coupling means to maintain the second and third portions in position with respect to the protective shell, and first mechanical centering means that cooperate with corresponding second mechanical centering means to center the second and third portions with respect to the protective shell. The first and second magnetic coupling means are respectively spaced apart from the first and second mechanical centering means.

What is claimed is: 
     
         1 . A protective helmet, particularly for sport and similar activities, comprising:
 an external protective cap;   at least a first protective shell positioned inside said external protective cap;   a protective internal liner positioned at least partially inside said first protective shell and removably fixed thereto, and adapted to come into contact with the head of a user, wherein said protective internal liner comprises a first portion adapted to surround at least a portion of the skull of a user and a second and a third portion adapted to protect at least partially the left and right lateral portion of the face of a user,   said first, second and third portion of said protective internal liner being fixable to/removable from said first protective shell independently from each other,   said second and third portion of said protective internal liner being each provided with
 first magnetic coupling means which cooperate with corresponding second magnetic coupling means positioned on said first protective shell to maintain in position said second and third portion of said protective internal liner with respect to said first protective shell, and with 
 first mechanical centering means which cooperate with corresponding second mechanical centering means positioned on said first protective shell to center said second and third portion of said protective internal liner with respect to said first protective shell, 
 said first magnetic coupling means and said second magnetic coupling means being respectively spaced apart from said first mechanical centering means and said second mechanical centering means. 
   
     
     
         2 . The protective helmet of  claim 1 , wherein said first protective shell comprises a first portion of central protection and a second and a third portion of lateral protection, said second magnetic coupling means being positioned in corresponding seats in said first portion of central protection and in said second and third portion of lateral protection. 
     
     
         3 . The protective helmet of  claim 2 , wherein said second and third portion of lateral protection each comprises a first closing plate having a first interface surface with said second and third portion of lateral protection of said first protective shell, and a second interface surface with the corresponding second and third portion of said protective internal liner, said second mechanical centering means being positioned on said second interface surface. 
     
     
         4 . The protective helmet of  claim 1 , wherein said second and third portion of said protective internal liner are each provided with a first interface plate having a first coupling surface with the corresponding second and third portion of said protective internal liner provided with housing seats for said first magnetic coupling means, and a second coupling surface with the corresponding second and third portion of lateral protection of said first protective shell, said first mechanical centering means being positioned on said second coupling surface of said first interface plate. 
     
     
         5 . The protective helmet of  claim 3 , wherein said first portion of central protection of said first protective shell comprises at least a second closing plate having a third interface surface with said first portion of central protection of said first protective shell and a fourth interface surface with said first portion of said protective internal liner, said second mechanical centering means being positioned on said fourth interface surface. 
     
     
         6 . The protective helmet of  claim 5 , wherein said first portion of said protective internal liner is provided with at least a second interface plate having a third coupling surface with said first portion of said protective internal liner provided with housing seats for said first magnetic coupling means, and a fourth coupling surface with said first portion of central protection of said first protective shell, said first mechanical centering means being positioned on said fourth coupling surface of said second interface plate. 
     
     
         7 . The protective helmet of  claim 6 , wherein said first portion of central protection of said first protective shell is provided with a frontally positioned second closing plate and a rear positioned second closing plate and in that said first portion of said protective internal liner is provided with a frontally positioned second interface plate and a rear positioned second interface plate. 
     
     
         8 . The protective helmet of  claim 6 , wherein said first portion of central protection of said first protective shell is provided with a frontally positioned second closing plate and said first portion of said protective internal liner is provided with a frontally positioned second interface plate, and in that said first portion of central protection of said first protective shell is provided with rear positioned third magnetic coupling means and said first portion of said protective internal liner is provided with fourth magnetic coupling means couplable to said third magnetic coupling means. 
     
     
         9 . The protective helmet of  claim 1 , wherein said first portion of central protection of said first protective shell comprises third magnetic coupling means and in that said first portion of said protective internal liner is provided with fourth magnetic coupling means couplable to said third magnetic coupling means. 
     
     
         10 . The protective helmet of  claim 9 , wherein said third magnetic coupling means are housed in a seat provided in first mechanical retaining means, said first mechanical retaining means comprising a male element provided with snap-locking means and positioned in a corresponding seat in said first protective shell, and a female element adapted to engage said snap-locking means of said male element, said first mechanical retaining means being provided with a conical seat for housing a corresponding conical element positioned on said first portion of said protective internal liner and housing said fourth magnetic coupling means. 
     
     
         11 . The protective helmet of  claim 9 , wherein said first portion of central protection of said first protective shell is provided with a frontally positioned second closing plate and said first portion of said protective internal liner is provided with a frontally positioned second interface plate, and in that said first portion of central protection of said first protective shell is provided with rear positioned third magnetic coupling means and said first portion of said protective internal liner is provided with fourth magnetic coupling means couplable to said third magnetic coupling means. 
     
     
         12 . The protective helmet of  claim 11 , wherein said third magnetic coupling means are housed in a seat provided in rear positioned first mechanical retaining means, said first mechanical retaining means comprising a male element provided with snap-locking means positioned in a corresponding rear seat in said first protective shell, and a female element adapted to engage said snap-locking means of said male element, said first mechanical retaining means being provided with a conical seat for housing a corresponding conical element rear positioned on said first portion of said protective internal liner and housing said fourth magnetic coupling means. 
     
     
         13 . The protective helmet of  claim 1 , further comprising a second protective shell positioned between said external protective cap and said first protective shell.