Adjustable child restraint device

1. A juvenile safety seat, comprising:

a backrest; and

a pair of side guards for protecting the body and shoulder of a person; each of the pair of side guards having a top end and a bottom end; the bottom end of each of the side guards being located a bottom distance from each other and the top end of each of the side guards being located a top distance from each other; each of the pair of side guards being respectively pivotally connected about an axis to the backrest at their bottom ends and movable between a closed position and an open position so that the bottom distance between the respective bottom ends of the side guards remains substantially constant and the top distance between the respective top ends of the side guards is adjustable by pivoting movement of the side guards; the pair of side guards being pivotally connected about the same axis; and

curved guide means, defining a curved travel pathway, in communication with the side guards for guiding movement of the side guards along the curved travel pathway.

2. The juvenile safety seat of claim 1 , wherein the curved guide means is attached to at least one of the pair of side guards.

3. The juvenile safety seat of claim 2 , wherein the curved guide means includes at least two members, which are both hollow and elongated, and of differing diameters from each other with one member being slidably received into another member.

4. The juvenile safety seat of claim 1 , wherein the curved guide means is attached to the back rest.

5. The juvenile safety seat of claim 1 , wherein the curved guide means includes at least one member, which is both hollow and elongated.

6. The juvenile safety seat of claim 1 , wherein the curved guide means is a first member connected to a side guard and a second member, which is hollow and elongated, and connected to the other side guard; wherein the first member is respectively slidably received in the second member.

7. The juvenile safety seat of claim 1 , wherein the curved guide means is at least one curved support member respectively connected to a side guard and respectively received in at least one curved channel in the backrest.

8. The juvenile safety seat of claim 1 , wherein the curved guide means is at least one curved support member respectively connected to a side guard and respectively received in at least one curved channel in the other side guard.

9. The juvenile safety seat of claim 1 , further comprising:

a pair of support members respectively connected to the side guards;

a plate rotatably connected to the backrest about an axis with an outer edge; the plate defining a pair of arcuate guides positioned about the axis; the arcuate guides each running from a position proximal to the axis to a position proximal to the outer edge of the plate; and

the support members being configured to respectively reside in the arcuate guides whereby rotation of the plate causes the side guards to simultaneously pivot about their respective axes.

10. A juvenile safety seat of claim 9 , wherein the plate is a cam rotatably connected to the backrest with the arcuate guides respectively defining two cycloid-shaped pathways therein with each of the side guards having a drive member respectively connected thereto; the drive members being respectively movably positioned within the cycloid-shaped pathways to configure the side guards for simultaneous operation and movement thereof.

11. The juvenile safety seat of claim 1 , wherein the curved guide means and at least one of the side guards are respectively formed as a unitary structure.

12. The juvenile safety seat of claim 1 , wherein the curved guide means and back rest are respectively formed as a unitary structure.