Helmet
A helmet of a layered and segmented design including impact attenuation structures may include a series of layers that individually, or in combination, provide the necessary functions of the helmet. The helmet may feature a layer with a low coefficient of friction to act as a slip layer and slide due to rotational force. The present technology includes impact attenuation structures of predetermined geometries, layers, and materials to allow for an appropriate impact response with a certain degree of control over the buckling process and an adaptive impact response. The present technology of impact attenuation structures may be applicable where impact absorption and controlled buckling is desired, such as bike helmets.
1. A helmet comprising:
a plurality of tiles configured to absorb impact, each of the tiles including an impact absorbing material with a profile with at least three sides and including a thickness, each of the at least three sides including a respective straight portion;
a plurality of connections that are flexible; and
another material covering the at least three sides to be between one of the at least three sides and another immediately adjacent one of the at least three sides of another of the tiles and extending from the at least three sides around an edge of and over a face of the impact absorbing material to be transverse to the at least three sides, wherein
each of the plurality of tiles is connected to another immediately adjacent one of the plurality of tiles by one of the plurality of connections at the respective straight portion such that each of the plurality of connections is configured to bend along a respective direction determined by the respective straight portion of immediately adjacent tiles,
the plurality of tiles and the plurality of connections are arranged to form a plurality of panels, each of the plurality of panels including more than one of the plurality of tiles and more than one of the plurality of connections,
the plurality of tiles and the plurality of connections are configured so that the helmet is repeatably changeable from a first configuration to a second configuration,
the first configuration is shaped to be worn on a user's head with the thickness normal to the user's head and the face of the impact absorbing material facing away from the user's head, and
the second configuration is at least partially collapsed to a shape smaller than the first configuration.
2. The helmet according to claim 1 , wherein the helmet is substantially cylindrical in the second configuration.
3. The helmet according to claim 1 , wherein the plurality of connections are elastic.
4. The helmet according to claim 1 , wherein the plurality of connections are inelastic.
5. The helmet according to claim 1 , wherein the profile is a triangle with rounded vertexes.
6. The helmet according to claim 1 , wherein each of the plurality of tiles includes, within the thickness, a base layer, a top layer and an impact absorbing layer between the base layer and the top layer.
7. The helmet according to claim 6 , further comprising a rotation layer between the top layer and the impact absorbing layer, wherein the rotation layer is configured to allow relative rotation between the top layer and the impact absorbing layer.
8. The helmet according to claim 7 , wherein the relative rotation is a limited amount of relative rotation.
9. The helmet according to claim 7 , wherein the rotation layer includes a socket and the top layer includes a ball that together form a ball and socket joint.
10. The helmet according to claim 1 , wherein the impact absorbing material is a honeycomb material.
11. The helmet according to claim 10 , wherein the honeycomb material includes a plurality of cells, each of the cells including walls surrounding a central opening, and the walls extend parallel to the thickness.
12. The helmet according to claim 1 , further comprising an inner layer and an outer layer that sandwich the plurality of tiles.
13. The helmet according to claim 12 , wherein at least one of the inner layer and the outer layer is configured to slip relative to the plurality of tiles during an impact transverse to the thickness.
14. The helmet according to claim 1 , wherein the plurality of tiles are arranged such that each of the plurality of connections corresponds to a gap between two respective ones of the tiles at the respective straight portions and a cross-section of each of the gaps is consistent where the respective straight portions are immediately adjacent.
15. The helmet according to claim 1 , wherein the impact absorbing material is a honeycomb and the other material is an impact attenuation material different from the honeycomb.
16. The helmet according to claim 15 , wherein the other material is bonded to the impact absorbing material.
17. The helmet according to claim 1 , wherein the other material is bonded to the impact absorbing material.