Vehicle occupant support

1. In a vehicle Child Restraint System a mechanism for protection of an occupant in an impact, comprising a support shell for the occupant pivotally attached about a substantially vertical pivot axis to a support frame attached to the vehicle, wherein the support shell is retained in a normal position by a combination of a lock and brace arm, on each side of said shell, wherein in each combination the lock and brace arm are pivotally attached to each other such that compressive forces on said lock and brace arm reinforce a locked engagement of the support shell with respect to the support frame and said lock and brace arm are adapted to fracture at a predetermined lateral load on the support shell to allow the shell to reorient with respect to the support frame.

2. In a Child Restraint System a mechanism for protection of an occupant in an impact comprising: a seatshell; a support structure; and a central main deformable shock strip, wherein the seatshell is supported on the support structure by the central main deformable shock strip, such that deformation of the central main deformable shock strip enables reorientation of the seat shell with respect to the support structure under both front and lateral impact; said central main deformable shock strip is u-shaped and comprises a first leg, a second leg vertically spaced from said first leg and a connecting section joining said first leg and said second leg; wherein free ends of said first leg and said second leg are oriented towards a back of said seatshell; and wherein said first leg is attached to said seat shell and said second leg is attached to said support structure; wherein under front impact loading said first leg reorients towards or away from said second leg and wherein under lateral impact loading said connecting section twists enabling side to side reorientation of said first leg relative to said second leg.

3. In a Child Restraint System a mechanism for protection of the occupant in an impact as in claim 2 wherein the central arm comprises a torsion resisting tube to resist torsion of the central main deformable shock strip during lateral impact loading, wherein the torsion resisting tube is attached at its front end to the central main deformable shock strip and at its rear end to the support structure of the Child Restraint System.

4. In a Child Restraint System a mechanism for protection of the occupant in an impact as in claim 3 , wherein the central arm is attached to a outer shell/frame which is pivotally attached to the support frame of the Child Restraint System with a central axle, and wherein the attachment of the rear end of the torsion resistant tube is to the central axle.

5. In a Child Restraint System a mechanism for protection of the occupant in an impact as in claim 2 , the seat shell supporting the occupant, wherein a head rest and harness support are attached to said dynamic innershell with a adjustment mechanism for raising and lowering the headrest and harness support, further comprising a routing of the harness on an inside of a back of the seat shell from the adjustable head rest and harness support, and below a bottom of the seat shell in a slot above the central main deformable shock strip to a harness adjustment lock at a front bottom of the seat shell.

6. In a Child Restraint System a mechanism for protection of the occupant in an impact as in claim 2 , wherein the support structure comprises an outershell pivoted to a frame and wherein the seat shell is supported by the central main deformable shock strip attached to the outer shell, to enable rotation of the outershell for egress and ingress relative to the frame attached to a vehicle, and a pair of legs on the seat shell supported by a sliding surface on the frame to support the seat shell under lateral impact conditions.