VEHICLE CHILD SEAT

• US 20100264706A1
• Filed: 04/14/2010
• Published: 10/21/2010
• Est. Priority Date: 04/16/2009
• Status: Active Grant

• Current Assignee: Recaro Child Safety GmbH & Co. KG. (Martin Putsch,)
• Original Assignee: Recaro Child Safety GmbH & Co. KG. (Martin Putsch,)
• Inventors: Pöhner, Jens, Gebhardt, Stefan, VOGT, Thomas
• Granted Patent: US 8,328,275 B2
• Time in Patent Office: Days
• US Class Current: 297/250.100
• CPC Class Codes: B60N 2/2812 for securing the child to the child seat
• CPC Class Codes: B60N 2/2851 provided with head-rests
• CPC Class Codes: B60N 2/2884 with protection systems against abnormal g-forces
• CPC Class Codes: B60R 22/105 for children adaptation of children's seats for seat belts B60N2/265, B60N2/2803

Abstract

A vehicle child seat is provided for directly or indirectly fastening to a vehicle seat and/or a vehicle structure. The vehicle child seat includes a backrest, a seat surface, an integrated belt system for fastening a child in the vehicle child seat and a belt tensioning device (31). The belt tensioning device (31) includes a trigger sensor, an energy storage device and a tensioning mechanism which, when exceeding a defined force acting on the vehicle child seat, in particular a crash force, abruptly tensions the belt system. All components of the belt tensioning device (31) required for the belt tensioning function being fastened to or in the vehicle child seat and being able to be removed therewith from the vehicle. A belt force limiting function is incorporated in the belt tensioning device (31). After triggering the belt tensioning device (31) when exceeding a limit force F_grenz on the belt portion (11, 12, 13, 15) at least one belt deflector (137, 171) is displaced sufficiently far in the direction of a normal position, until the limit force F_grenz has fallen below or the belt deflector (137, 171) has completely reached its normal position.

Claims

1. A vehicle child seat for directly or indirectly fastening to a vehicle seat and/or a vehicle structure, the vehicle child seat comprising:

a backrest;

a seat surface;

an integrated belt system for fastening a child in the vehicle child seat; and

a belt tensioning device comprising a trigger sensor, an energy storage device and a tensioning mechanism, the tensioning mechanism abruptly tensioning the belt system when a force acting on the vehicle child seat exceeds a defined crash force, all components of the belt tensioning device required for the belt tensioning function being fastened to the vehicle child seat or in the vehicle child seat and being able to be removed therewith from the vehicle, the tensioning device including a belt force limiting function incorporated therewith in the belt tensioning device, and after triggering the belt tensioning device when exceeding a limit force F_grenz on the belt portion at least one belt deflector is displaced sufficiently far in the direction of the at least one belt deflector normal position, until the limit force F_grenz has fallen below or the belt deflector has completely reached its normal position.

2. The vehicle child seat as claimed in claim 1, wherein the trigger sensor comprises a sensor mass, the inertia force of the sensor mass, in the event of a crash, acting on the tensioning mechanism and triggering the belt tensioning device.

3. The vehicle child seat as claimed in claim 1, wherein the energy storage device comprises one or more springs.

4. The vehicle child seat as claimed in claim 1, wherein the tensioning mechanism comprises a belt deflector acted upon by the energy storage device, the first belt deflector deflecting a belt portion of the belt system and in the event of a crash being moved from a normal position into a crash position.

5. The vehicle child seat as claimed in claim 4, wherein the tensioning mechanism comprises an additional belt deflector which additionally deflects the belt portion.

6. The vehicle child seat as claimed in claim 5, wherein the belt portion, the belt deflector and the additional belt deflector form a pulley block.

7. The vehicle child seat as claimed in claim 1, wherein the tensioning mechanism comprises a connector for locking a movable counter element of the first belt deflector.

8. The vehicle child seat as claimed in claim 7, wherein the connector corresponds in construction to an ISOFIX connector and may be unlocked by a triggering device.

9. The vehicle child seat as claimed in claim 8, wherein the sensor mass is attached directly or indirectly to the triggering device.

10. The vehicle child seat as claimed in claim 1, wherein the trigger sensor, the energy storage device and the tensioning mechanism are accommodated or attached in and/or on a single housing.

11. A vehicle child seat for directly or indirectly fastening to a vehicle seat and/or a vehicle structure, the vehicle child seat comprising:

a backrest;

a seat surface;

an integrated belt system for fastening a child in the vehicle child seat; and

a belt tensioning device fully connected to the vehicle child seat to form a system with the backrest, the seat surface and the integrated belt system, wherein the system may be inserted into the vehicle and removed from the vehicle as a unit, the belt tensioning device comprising a trigger sensor, an energy storage device and a tensioning mechanism, the tensioning mechanism tensioning the belt system when a force acting on the vehicle child seat exceeds a defined crash force, the tensioning device incorporating a belt force limiting means including at least one displaceable belt deflector for limiting a force applied via the belt system upon displacement of the displaceable belt deflector caused by force exceeding a limit force.

12. The vehicle child seat as claimed in claim 11, wherein the trigger sensor comprises a sensor mass, the inertia force of the sensor mass, in the event of a crash, acting on the tensioning mechanism and triggering the belt tensioning device.

13. The vehicle child seat as claimed in claim 12, wherein the energy storage device comprises one or more springs.

14. The vehicle child seat as claimed in claim 13, wherein the tensioning mechanism comprises a belt deflector acted upon by the energy storage device, the first belt deflector deflecting a belt portion of the belt system and in the event of a crash being moved from a normal position into a crash position.

15. The vehicle child seat as claimed in claim 14, wherein the tensioning mechanism comprises an additional belt deflector which additionally deflects the belt portion.

16. The vehicle child seat as claimed in claim 15, wherein the belt portion, the belt deflector and the additional belt deflector form a pulley block.

17. The vehicle child seat as claimed in claim 11, wherein the tensioning mechanism comprises a connector for locking a movable counter element of the first belt deflector.

18. The vehicle child seat as claimed in claim 17, wherein the connector corresponds in construction to an ISOFIX connector and may be unlocked by a triggering device.

19. The vehicle child seat as claimed in claim 18, wherein the sensor mass is attached directly or indirectly to the triggering device.

20. The vehicle child seat as claimed in claim 11, wherein the trigger sensor, the energy storage device and the tensioning mechanism are accommodated or attached in and/or on a single housing.