Crash-helmet for cyclists and sportspeople in general

Crash helmet for cyclists and sportspeople comprising

• a protection cap of rigid expanded material opportunely shaped and provided with means defining openings suitable to ensure an adequate ventilation within said cap, and means defining slots suitable to permit the passage of chin-straps;
• at least two elements for fastening chin-straps on two external sides of said cap, constituted by a small frame provided with two holding and engagement means placed in opposite position with respect to one another along the edges of said frame and by a strap-holding bar suitable to fit in and be stably held between said holding and engagement means;
• at least two chin-straps provided on one end with an eyelet loop suitable to be engaged on said strap-holding bar;
• said frame has basically the profile of an isosceles triangle, dihedron-bent at 90.degree. along its height to form an edge, said holding and engagement means being placed in correspondence of the vertex and the centre of the basis of said isosceles triangle respectively, so that said strap-holding bar, fitted in said holding means is placed in correspondence of the edge of the dihedron.