Helmet and helmet element for use in a helmet

1. A helmet element for use as a component of a helmet which is provided with a helmet shell and a cranium strap for encircling the user's cranium, the helmet element providing a connection between said cranium strap and helmet shell, the helmet element comprising

a first spring member comprising a first leaf spring extending between first and second ends of the first leaf spring; and

a second spring member comprising a second leaf spring extending between first and second ends of the second leaf spring, the first ends of the first and second leaf spring being coupled to each other and the second ends of the first and second leaf spring being coupled to each other, the first and second leaf springs having curved surfaces that form a space between parts of the first and second leaf spring, wherein the space narrows in two directions from the center of the space toward the connected first and second ends,

wherein the first and second leaf springs are interconnected directly at their first and second ends,

wherein the first leaf spring includes a first mounting opening configured to connect to the helmet shell and the second leaf spring includes a second mounting opening configured to connect to the cranium strap, and

wherein a first spacing collar, integral with the first leaf spring and protruding from the curved surface of the first leaf spring and away from the space, encircles the first mounting opening and a second spacing collar, integral with the second leaf spring and protruding from the curved surface of the second leaf spring and away from the space, encircles the second mounting opening.

2. A helmet element according to claim 1 , comprising a buffer member located at least partly in said space between the first and second leaf spring.

3. A helmet element according to claim 2 , wherein the first and second spring members are configured to allow the installation of buffer members having different thicknesses and/or densities between the leaf springs.

4. A helmet element according to claim 2 , wherein the buffer member is made from a foamy synthetic material or rubber.

5. A helmet element according to claim 1 , wherein the first and second mounting openings are configured to connect to the helmet shell and the cranium strap respectively, at positions between the first and second ends.

6. A helmet element according to claim 5 , wherein the first and second mounting openings are configured to connect to the helmet shell and the cranium strap respectively, at positions substantially midway between the first and second ends.

7. A helmet element according to claim 1 , wherein the first and second leaf spring form an integral spring member, made of a thermoplastic or thermosetting synthetic material.

8. A helmet element as claimed in claim 1 , wherein the first and second leaf springs form an integral spring member, the first and second leaf spring being integrally interconnected at their first and second ends.

9. A helmet, comprising

a helmet shell,

a cranium strap for encircling the user's cranium, and

at least one helmet element connected to the helmet shell and to the cranium strap, the helmet element comprising

a first spring member, connected to the helmet shell, the first spring member comprising a first leaf spring extending between first and second ends of the first leaf spring; and

a second spring member, connected to the cranium strap, the second spring member comprising a second leaf spring extending between first and second ends of the second leaf spring, the first ends of the first and second leaf spring being coupled to each other and the second ends of the first and second leaf spring being coupled to each other, leaving a space between parts of the first and second leaf spring between the connected first and second ends,

wherein the first and second leaf springs are interconnected directly at their first and second ends.

10. A helmet according to claim 9 , comprising a plurality of helmet elements at mutually different positions along the cranium strap.

11. A kit, comprising the helmet of claim 9 , and a set of buffer members of respective different thicknesses and/or densities, and/or parts suitable for composing buffer members of respective different thicknesses and/or densities, wherein the buffer members are configured for insertion in the space between the first and second leaf spring.

12. A method of adjusting head fit of a helmet that comprises a helmet shell and a cranium strap for enclosing the user's cranium, and at least one helmet element connecting said cranium strap and helmet shell, wherein the helmet element comprises first and second spring members, connected to the helmet shell and the cranium strap respectively, the first and second spring members comprising leaf springs interconnected directly at their respective first and second ends, leaving a space of eye-shaped cross-section between the leaf springs, the adjustment comprising fitting the helmet to the head of a user by inserting a buffer member of a selected thickness and/or density in said space between the first and second leaf spring.

13. A helmet comprising

a helmet shell,

a cranium strap for encircling the user's cranium, and

a helmet element providing a connection between said cranium strap and helmet shell, the helmet element comprising

a first spring member, connected to the helmet shell, the first spring member comprising a first leaf spring extending between first and second ends of the first leaf spring; and

a second spring member, connected to the cranium strap, the second spring member comprising a second leaf spring extending between first and second ends of the second leaf spring, and

a buffer member located between the first and second leaf spring,

wherein the first ends of the first and second leaf spring are coupled to each other outside the buffer member and the second ends of the first and second leaf spring being coupled to each other outside the buffer member, leaving a space between parts of the first and second leaf spring between the connected first and second ends, the buffer member being located at least partly in said space.

14. A helmet comprising

a helmet shell,

a cranium strap for encircling the user's cranium, and

a helmet element providing a connection between said cranium strap and helmet shell, the helmet element comprising

a first spring member, connected to the helmet shell, the first spring member comprising a first leaf spring extending between first and second ends of the first leaf spring; and

a second spring member, connected to the cranium strap, the second spring member comprising a second leaf spring extending between first and second ends of the second leaf spring, the first ends of the first and second leaf spring being coupled to each other and the second ends of the first and second leaf spring being coupled to each other, leaving a space between parts of the first and second leaf spring between the connected first and second ends, wherein the first and second leaf springs form an integral spring member, the first and second leaf spring being integrally interconnected at their first and second ends.

15. A cranium strap assembly for use in a helmet, the cranium strap assembly comprising

a cranium strap for encircling the user's cranium,

a helmet element connected to the cranium strap, the helmet element configured to provide a connection between said cranium strap and a helmet shell, the helmet element comprising

a first spring member comprising a first leaf spring extending between first and second ends of the first leaf spring; and

a second spring member, connected to the cranium strap, the second spring member comprising a second leaf spring extending between first and second ends of the second leaf spring, the first ends of the first and second leaf spring being coupled to each other and the second ends of the first and second leaf spring being coupled to each other, leaving a space between parts of the first and second leaf spring between the connected first and second ends,

wherein the first and second leaf springs are interconnected directly at their first and second ends.

16. The cranium strap assembly of claim 15 , further comprising a buffer member located at least partly in said space between the first and second leaf spring.

17. The cranium strap assembly of claim 16 , wherein the first and second spring members are configured to allow the installation of buffer members having different thicknesses and/or densities between the leaf springs.

18. The cranium strap assembly of claim 16 , wherein the buffer member is made from a foamy synthetic material or rubber.

19. The cranium strap assembly of claim 15 , wherein the first and second leaf spring form an integral spring member, made of a thermoplastic or thermosetting synthetic material.