Protective helmet

Abstract

A protective helmet includes a helmet shell, a support cage, and a securing device for securing the support cage to the helmet shell. An impact absorption device is arranged between the support cage and the helmet shell.

1 . A protective helmet comprising:
 a helmet shell;   a support cage:   a first securing device for securing the support cage on the helmet shell;   a second securing device for securing a component other than the support cage to the helmet shell; and   an impact absorption device disposed between the support cage and the helmet shell;   wherein the second securing device aids in positioning the impact absorption device.   
     
     
         2 . The protective helmet according to  claim 1 , wherein the impact absorption device is in part positively arranged on the helmet shell or the support cage. 
     
     
         3 . The protective helmet according to  claim 1 , wherein the impact absorption device is in part non-positively arranged on the helmet shell or the support cage. 
     
     
         4 . The protective helmet according to  claim 1 , wherein the impact absorption device comprises a substantially plastic deformation behavior responsive to an impact on the helmet shell. 
     
     
         5 . The protective helmet according  claim 1 , wherein the impact absorption device composes a plurality of cavities, at least a first cavity separated from a second cavity by a wall. 
     
     
         6 . The protective helmet according to  claim 5 , wherein the pluralities of cavities comprises a plurality of tubes. 
     
     
         7 . The protective helmet according to  claim 6 , wherein the plurality of tubes comprises an extruded copolymer. 
     
     
         8 . The protective helmet according to  claim 6 ,
 wherein a first tube of the plurality of tubes comprises a first inner wall and a first outer wall, the second tube of the plurality of tubes comprises a second inner wall and a second outer wall, the first outer wall being in contact with the second outer wall; and   wherein the first inner wall is thicker than the first outer wall or the second inner wall is thicker than the second outer wall.   
     
     
         9 . The protective helmet according to  claim 6 ,
 wherein a first tube of the plurality of tubes comprises a first inner wall and a first outer wall, the second tube of the plurality of tubes comprises a second inner wall and a second outer wall, the first outer wall being in contact with the second outer wall; and   wherein the first outer wall and the second outer wall are connected by heat.   
     
     
         10 . The protective helmet according to  claim 1 , wherein the impact absorption device comprises Koroyd. 
     
     
         11 . (canceled) 
     
     
         12 . The protective helmet according to  claim 1 , wherein the second securing device prevents the impact absorption device from shifting between the helmet shell and the support cage. 
     
     
         13 . The protective helmet according to  claim 1 , wherein the first securing device is designed so that the support cage assumes an end position with respect to the first securing device in a used state of the protective helmet, and the support cage applies a force to the impact absorption device in an end position to prevent movement of the impact absorption device between the helmet shell and the support cage. 
     
     
         14 . The protective helmet according to  claim 1 , wherein the impact absorption device comprises a plurality of grooves forming ventilation channels together with the helmet shell on a side of the impact absorption device facing the helmet shell. 
     
     
         15 . The protective helmet according to  claim 14 , further comprising openings in the helmet shell, the ventilation channels communicate with the openings.