Child safety seat with energy absorbing apparatus

• US 8,348,337 B2
• Filed: 03/17/2010
• Issued: 01/08/2013
• Est. Priority Date: 03/17/2010
• Status: Active Grant

• Current Assignee: Britax Child Safety Incorporated (Cc 1 (2011) Ltd.)
• Original Assignee: Britax Child Safety Incorporated (Cc 1 (2011) Ltd.)
• Inventors: Franck, Christopher G., Strong, L. Curtis
• Primary Examiner(s): Dunn, David
• Assistant Examiner(s): Allred, David E
• Application Number:
  US12/725,907
• Publication Number:
  US 20110227376A1
• Time in Patent Office: 1,028 Days
• Field of Search: 297/216.11, 297/216.16, 297/216.19, 297/256.13, 297/256.14
• US Class Current: 297/216.11
• CPC Class Codes: B60N 2/2809 with additional tether connected to the top of the child seat and passing above the top of the back-rest
• CPC Class Codes: B60N 2/2821 having a seat and a base part
• CPC Class Codes: B60N 2/286 forward facing B60N2/2866 takes precedence
• CPC Class Codes: B60N 2/2884 with protection systems against abnormal g-forces
• CPC Class Codes: B60N 2/2887 Fixation to a transversal anchorage bar, e.g. isofix

Abstract

A child safety seat configured for installation in a vehicle may include a base and a seat that includes a bottom, whereby the seat is connected to the base along an axis. The base and the seat together define a cavity that is disposed therebetween and the seat bottom is configured to rotate about the axis that connects the seat to the base during a frontal impact such that the seat bottom advances into the cavity. The safety seat may include energy absorbing member disposed within the cavity wherein the energy absorbing member is configured to be deformed as the seat bottom advances into the cavity during frontal impact. The energy absorbing member may be deformed by substantially vertical movement of the seat bottom into the cavity.

Claims

1. A safety seat comprising:

a base; and

a rigid seat shell including a bottom and a back, wherein the seat shell is connected proximate the bottom of the seat shell to the base by a pivot mechanism comprising a pivot axis at a connection between the seat shell and the base, wherein the seat shell is pivotable relative to the base about the axis between the base and the seat shell, and wherein the axis remains fixed relative to the seat shell and the base;

wherein the axis is disposed proximate an end of the bottom of the seat shell opposite an end of the bottom that is proximate the back of the seat shell, and the axis is disposed at an end of the base opposite an end of the base that is proximate the back of the seat shell;

wherein the base and seat shell define a cavity disposed there between; and

wherein the seat shell bottom is configured to rotate about the axis and advance into the cavity during a frontal impact of a vehicle in which the safety seat is installed in a vehicle seat with the back of the safety seat proximate a back of the vehicle seat.

2. The safety seat of claim 1, further comprising an energy absorbing member disposed within the cavity, wherein the energy absorbing member is configured to be deformed as the seat shell bottom advances into the cavity during the frontal impact.

3. The safety seat of claim 2, wherein the energy absorbing member is deformed by substantially vertical movement of the seat shell bottom into the cavity.

4. The safety seat of claim 1, wherein the base and the seat shell are configured with a motion guide to direct the motion of the seat shell bottom along a path into the cavity during the frontal impact.

5. The safety seat of claim 4, wherein the path of the seat shell bottom with respect to the base is substantially perpendicular to the direction of the frontal impact.

6. The safety seat of claim 4, wherein the motion guide includes a motion inhibitor that precludes motion of the seat shell bottom along the path when force from the frontal impact is below a threshold value.

7. The safety seat of claim 4, wherein the motion guide is fixed relative to the base and includes a groove, wherein the seat shell includes a pin that is fixed relative to the seat shell, wherein the pin is arranged within the groove, and wherein the groove defines the path of the pin during the frontal impact.

8. The safety seat of claim 4, wherein the motion guide is configured to provide a visual indication of the seat shell bottom relative to the cavity.

9. The safety seat of claim 1, wherein the seat shell is pivotally coupled to the base along the axis and the seat shell is configurable between at least two angles of recline with respect to the base.

10. The safety seat of claim 2, wherein the energy absorbing member disposed within the cavity is configured to allow the seat shell to adjust between at least two angles of recline with respect to the base.

11. The safety seat of claim 10, wherein a top surface of the energy absorbing member includes a concave curvature and wherein the concave curvature is configured to cradle a convex curvature of the bottom of the seat shell.

12. A safety seat comprising:

a base; and

a rigid seat shell including a bottom and a back, wherein the seat shell is connected to the base at an axis fixed relative to the seat shell and the base;

wherein the base and seat shell define a cavity disposed there between;

wherein the seat shell bottom is configured to advance into the cavity during a frontal impact producing a force when the safety seat is installed in a vehicle in a forward-facing position;

wherein the axis is disposed proximate an end of the bottom of the seat shell opposite an end of the bottom proximate the back of the seat shell, and the axis is disposed at an end of the base opposite an end of the base that is proximate the back of the seat shell;

wherein the seat shell and the base remain connected to each other at the axis during the frontal impact of a vehicle in which the safety seat is installed in a vehicle seat with the back of the safety seat proximate a back of the vehicle seat; and

wherein the safety seat is configured to attach to a vehicle by at least one strap.

13. The safety seat of claim 12, wherein the at least one strap is configured to restrict the motion of the seat shell during a frontal impact and cause the seat shell bottom to advance towards the cavity when the safety seat is installed in a forward-facing position.

14. The safety seat of claim 12, further comprising energy absorbing member disposed within the cavity, wherein the energy absorbing member is configured to be deformed as the seat shell bottom advances into the cavity.

15. The safety seat of claim 12, wherein the seat shell bottom is configured to remain fixed relative to the base during a frontal impact when the safety seat is installed in a vehicle in a rearward facing position.

16. The safety seat of claim 12, further comprising a motion guide configured to direct motion of the seat shell bottom into the cavity during the frontal impact and wherein the motion guide comprises a pin ridge that prevents the seat shell bottom from advancing into the cavity when the force of the frontal impact is below a threshold value.

17. A safety seat comprising:

a rigid seat shell including a bottom and a back;

a base;

a pivot mechanism having a pivot axis, the pivot mechanism interconnecting the seat shell and the base at the pivot axis, the pivot axis being at a fixed location relative to the seat shell and the base wherein the axis is disposed proximate an end of the bottom of the seat shell opposite an end of the bottom proximate the back of the seat shell, and the axis is disposed at an end of the base opposite an end of the base that is proximate the back of the seat shell;

an energy absorbing member disposed between the bottom of the seat shell and the base; and

a motion guide comprising a groove extending lengthwise generally perpendicularly to a forward facing direction of the seat shell, the motion guide configured to direct the bottom of the seat shell into the energy absorbing member and the bottom of the seat shell deforming the energy absorbing member during a frontal impact when the safety seat is installed in a vehicle in a forward-facing position, in which the safety seat is installed in a vehicle seat with the back of the safety seat proximate a back of the vehicle seat, and wherein the motion guide engages a pin at one end of the motion guide such that the motion guide is configured to preclude the bottom of the seat shell from deforming the energy absorbing member during a frontal impact when the safety seat is installed in a vehicle in a rearward-facing position.

18. The safety seat of claim 17, wherein the motion guide is further configured to prevent the bottom of the seat shell from deforming the energy absorbing member during a frontal impact producing a force below a threshold value.

19. The safety seat of claim 17, further comprising attachment straps that attach the safety seat to the vehicle and cooperate with the motion guide to direct the bottom of the seat shell into the energy absorbing member during a frontal impact.