A deformable, polypropylene-moulding lining ( 11 ), is provided in a head rest. It has a crosspiece ( 12 ), clipped ( 14 ) to the head support ( 5 ) and right and left deformable wings ( 15, 16 ). These are longer than the support wings ( 5, 6 ) of the head part ( 4 ), extending past distal edges ( 17 ) of the support wings. The deformable wings are spaced inwards from the support wings, with voids ( 18 ) defined between them. The deformable wings are divided into two in their forwards extent by a living hinge ( 19 ) into a front portion ( 20 ) and a rear portion ( 21 ). The living hinge is positioned just inside the distal edges of the shell wings. The injection moulded lining has its own foam materiel lining ( 22 ), the whole being covered with upholstery ( 23 ). The result of the arrangement is that if an occupant's head H impacts the lining in side impact of the vehicle equipped with the seat, the relevant lining wing will be pressed against the shell wing. This involves energy absorbing (maximum acceleration limiting) deformation of not only the foam material, but also of the lining wing and to a less extent of the shell wing. With the lining wing deformation ( 24 ), the front portion ( 20 ) of the lining wing pivots forwards about the shell edge ( 17 ), from a position swept back with respect to the shell wing to a position generally in line with the compressed inner portion of the lining.
1. A safety seat comprising:
(a) a winged head rest, the head rest having:
(i) a rear head support,
(ii) forwards-and-sideways extending support wings, fixed to the rear head support at respective opposite sides thereof and
(iii) deformable extensions of the support wings, each extension being hingedly connected to its support wing remote from the rear head support and normally extending obliquely forwards and laterally outwards of its support wing,
(b) whereby on lateral impact including impact of the winged headrest with a side part of a vehicle with the extension on the impacted side striking the side part first, the extension hinges inwards.
2. A safety seat as claimed in claim 1 , wherein the deformable extensions are formed integrally with support wings.
3. A safety seat as claimed in claim 1 , wherein the rear head support, the support wings and the deformable extensions are an integral injection moulding with living hinges being provided between the support wings and the extensions.
4. A safety seat comprising a wingedged head rest, the head rest having:
(a) a rear head support and
(b) forwards-and-sideways extending support wings, fixed to the rear head support at respective opposite sides thereof
(c) deformable lining wings for the support wings, each lining wing
(i) being secured to the headrest at a root between the rear head support and its support wing and
(ii) abutting the distal end of its support wing and
(iii) defining a void between itself and its support wing,
whereby on lateral impact including impact of the head of an occupant of the safety seat with one of the lining wings, head acceleration energy is absorbed in deformation of the lining wing towards its support wing.
5. A safety seat as claimed in claim 4 ,wherein the deformable lining wings each have a forwards extension past the distal end of its support wing, whereby on such lateral impact, as the lining wing is deformed towards its support wing, it pivots about the distal end and the forwards extension is pivotally moved inwards with respect to the lateral extent of the wings.
6. A safety seat as claimed in claim 5 , wherein the lining wings and their forwards extension are of uniform cross-section.
7. A safety seat as claimed in claim 5 , wherein the lining wings and their forwards extension are provided with a hinge line therebetween close to but set in from the respective distal end, whereby they are weakened to enable the hinge lines to abut the support wings on deformation to provide predictable inwards movement of the support wings.
8. A safety seat as claimed in claim 7 , wherein the weakening is a living hinge.
9. A safety seat as claimed in claim 4 , further comprising an energy absorbent pad positioned on a side of the deformable lining about a seat occupant's head.
10. A safety seat as claimed in claim 4 , wherein the lining wings and their pads where provided, together with their crosspiece where provided, are covered with upholstery fabric.
11. A safety seat comprising:
(a) a winged head rest, the head rest comprising:
(i) a rear head support, and
(ii) forwards-and-sideways extending support wings fixed to the rear head support at respective opposite sides thereof and defining distal edges; and
(b) a deformable lining secured to the winged head rest, the deformable lining comprising:
(i) a head support crosspiece, and
(ii) deformable wings fixed to the crosspiece, the deformable wings extending beyond the support wings and divided into front and rear portions by a hinge positioned within the distal edges of the support wings;
(c) whereby on lateral impact of the winged headrest with a side part of a vehicle the front portions of the deformable wings hinge inwards.
12. A safety seat as claimed in claim 11 , wherein the lining abuts the distal ends of the support wings and defines voids between itself and the support wings, whereby on lateral impact including impact of the head of an occupant of the safety seat with one of the deformable wings:
(i) head acceleration energy is absorbed in deformation of the deformable wing towards its support wing and
(ii) as the deformable wing is deformed towards its support wing, the front portion extending past the distal edge of its support wing pivots about the distal edge and moves inwards with respect to the support wing.
13. A safety seat as claimed in claim 11 , further comprising an energy absorbent pad positioned on a side of the deformable lining about a seat occupant's head.
14. A safety seat as claimed in claim 13 , wherein the energy absorbent pad is covered with an upholstery fabric.