Active material actuated headrest assemblies
First Claim
Patent Images
1. A headrest adapted for use with the head of an occupant, the headrest comprising:
- a post extending from a seatback;
a padded covering defining an engaging surface at a first location relative to the head, wherein the surface presents a first modulus property;
a frame disposed within the padded covering; and
an active material selected from the group consisting essentially of shape memory alloy, a ferromagnetic shape memory alloy, a shape memory polymer, a magnetorheological elastomer, an electrorheological elastomer, an electroactive polymer, a piezoelectric material, a magnetorheological fluid, an electrorheological fluid, a shear thickening fluid, a shear thinning fluid, and combinations thereof, disposed within the padded covering, in operative communication with a portion of the surface, and presenting a first condition,said material being configured to undergo a change in at least one property upon receipt of an activation signal, so as to achieve a second condition,said covering, frame, and material being cooperatively configured such that the change in at least one property is effective to re-position the surface to a second location relative to the head or change the modulus property of the surface to a second modulus property, and deactivating the signal autonomously returns the surface to the first location or first modulus property.
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Accused Products
Abstract
A headrest assembly including active material drivenly coupled to a headrest component, such as for example, an interior frame member, bag, or gear device ,wherein the material is actuated upon receipt of an activation signal, and configured to morph, reposition, reduce the resistance of, change a modulus property of, or otherwise modify an engaging surface defined by the headrest when actuated, and autonomously restore the headrest upon the deactivation of the material.
66 Citations
12 Claims
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1. A headrest adapted for use with the head of an occupant, the headrest comprising:
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a post extending from a seatback; a padded covering defining an engaging surface at a first location relative to the head, wherein the surface presents a first modulus property; a frame disposed within the padded covering; and an active material selected from the group consisting essentially of shape memory alloy, a ferromagnetic shape memory alloy, a shape memory polymer, a magnetorheological elastomer, an electrorheological elastomer, an electroactive polymer, a piezoelectric material, a magnetorheological fluid, an electrorheological fluid, a shear thickening fluid, a shear thinning fluid, and combinations thereof, disposed within the padded covering, in operative communication with a portion of the surface, and presenting a first condition, said material being configured to undergo a change in at least one property upon receipt of an activation signal, so as to achieve a second condition, said covering, frame, and material being cooperatively configured such that the change in at least one property is effective to re-position the surface to a second location relative to the head or change the modulus property of the surface to a second modulus property, and deactivating the signal autonomously returns the surface to the first location or first modulus property. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A headrest assembly comprising:
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a central portion; a first wing portion coupled to one side of the central portion; a second wing portion coupled to an other side of the central portion; a frame for supporting and defining the wing and central portions, wherein the frame has interconnecting members formed of an active material selected from the group consisting essentially of a shape memory alloy, a ferromagnetic shape memory alloy, a shape memory polymer, a magnetorheological elastomer, an electrorheological elastomer, an electroactive polymer, a piezoelectric material, a magnetorheological fluid, an electrorheological fluid, a shear thickening fluid, a shear thinning fluid, and combinations thereof, wherein the active material is configured to selectively change a position of the wing and/or central portions or change a modulus property of the wing portions relative to the central portion. - View Dependent Claims (11, 12)
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Specification