Vehicle airbag systems and methods with magnetic elements

• US 10,300,880 B2
• Filed: 05/18/2017
• Issued: 05/28/2019
• Est. Priority Date: 05/18/2017
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Mihm, Russell J.
• Primary Examiner(s): Brown, Drew J
• Application Number:
  US15/599,123
• Publication Number:
  US 20180334130A1
• Time in Patent Office: 740 Days
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 21/013 including means for detecting collisions, impending collisions or roll-over
• CPC Class Codes: B60R 21/16 Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags protective garments with automatically inflatable shock-absorbing means A41D13/018; connection of valves to inflatable elastic bodies B60C29/00
• CPC Class Codes: B60R 21/207 in vehicle seats
• CPC Class Codes: B60R 21/214 in roof panels
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2334 Expansion control features

Abstract

An airbag module for a vehicle includes an airbag cushion; an inflator coupled to the airbag cushion and configured to selectively provide air to inflate and deploy the airbag cushion from a stowed state into a deployed state; an airbag magnetic element coupled to the airbag cushion; and a magnetic guide element arranged at a distance to the airbag magnetic element when the airbag cushion is in the stowed state. Upon deployment of the airbag cushion, the airbag magnetic element and the magnetic guide element magnetically interact with one another to at least one of guide the airbag cushion in a predetermined direction or maintain the airbag cushion in a predetermined deployed position.

Claims

1. An airbag module for a vehicle, comprising:

an airbag cushion, wherein the airbag cushion includes a panel on an outer face of a distal end of the airbag cushion that defines a periphery location of the airbag cushion, the panel having a surface forming a pocket within the airbag cushion;

an inflator coupled to the airbag cushion and configured to selectively provide air to inflate and deploy the airbag cushion from a stowed state into a deployed state;

an airbag magnetic element coupled to the airbag cushion and disposed within the pocket, at the surface, and facing toward a direction of deployment; and

a magnetic guide element arranged at a distance to the airbag magnetic element when the airbag cushion is in the stowed state,

wherein, upon deployment of the airbag cushion, the airbag magnetic element and the magnetic guide element magnetically interact with one another to at least one of guide the airbag cushion in a predetermined direction or maintain the airbag cushion in a predetermined deployed position.

2. The airbag module of claim 1, wherein the airbag magnetic element and the magnetic guide element are arranged for mutual magnetic attraction.

3. The airbag module of claim 2, wherein the airbag magnetic element and the magnetic guide element are arranged such that the mutual magnetic attraction maintains the airbag cushion in the predetermined deployed position.

4. The airbag module of claim 1, wherein the airbag magnetic element and the magnetic guide element are arranged to guide the airbag cushion in the predetermined direction.

5. The airbag module of claim 3, wherein the airbag magnetic element and the magnetic guide element are arranged such that the airbag magnetic element is repelled by the magnetic guide element in the predetermined direction.

6. The airbag module of claim 1, wherein the airbag magnetic element and the airbag cushion are mounted in a seat of the vehicle, and the magnetic guide element is mounted in a frame element of the vehicle.

7. The airbag module of claim 1, wherein the airbag magnetic element and the airbag cushion are mounted in a roof of the vehicle, and the magnetic guide element is mounted in a side frame element of the vehicle.

8. The airbag module of claim 1, further comprising a retention mechanism comprising a first portion proximate to the airbag magnetic element and a second portion proximate to the magnetic guide element, and wherein, upon deployment, the first and second portions cooperate to mechanically maintain the airbag cushion in the predetermined deployed position;

wherein the first portion of the retention mechanism is integrated into the airbag magnetic element, the first portion of the retention mechanism and the airbag magnetic element forming an enlarged section, and

wherein the second portion of the retention mechanism is integrated into the magnetic guide element and form an opening and slot that capture the enlarged section to mechanically retain the airbag cushion in the predetermined deployed position.

9. The airbag module of claim 1, wherein at least one of the airbag magnetic element or the magnetic guide element is formed with neodymium and induces a pull force of approximately 20 lbs to approximately 130 lbs.

10. A vehicle, comprising:

a frame structure forming a cabin, the frame structure including a floor, a roof, and at least two side structures;

at least one seat mounted to the floor within the cabin;

an airbag module coupled to at least one of the frame structure or the at least one seat,

the airbag module including;

an airbag cushion, wherein the airbag cushion includes a panel on an outer face of a distal end of the airbag cushion that defines a periphery location of the airbag cushion, the panel having a surface forming a pocket within the airbag cushion;

an inflator coupled to the airbag cushion and configured to selectively provide air to inflate and deploy the airbag cushion from a stowed state into a deployed state; and

an airbag magnetic element coupled to the airbag cushion and disposed within the pocket, at the surface, and facing toward a direction of deployment; and

a magnetic guide element coupled to at least one of the frame structure or the at least one seat and arranged at a distance to the airbag magnetic element when the airbag cushion is in the stowed state,

wherein, upon deployment of the airbag cushion, the airbag magnetic element and the magnetic guide element magnetically interact with one another to at least one of guide the airbag cushion in a predetermined direction or maintain the airbag cushion in a predetermined deployed position.

11. The vehicle of claim 10, wherein the airbag module is mounted on the at least one seat, and the magnetic guide element is mounted on the frame structure.

12. The vehicle of claim 10, wherein the airbag module is mounted on the frame structure, and the magnetic guide element is mounted on the at least one seat.

13. The vehicle of claim 10, wherein the airbag module and the magnetic guide element are mounted on the frame structure.

14. The vehicle of claim 13, wherein one of the airbag module or the magnetic guide element is mounted on the roof of the frame structure and the other one of the airbag module or the magnetic guide element is mounted on the floor of the frame structure.

15. The vehicle of claim 10, further comprising a retention mechanism comprising a first portion proximate to the airbag magnetic element and a second portion proximate to the magnetic guide element, and wherein, upon deployment, the first and second portions cooperate to mechanically maintain the airbag cushion in the predetermined deployed position.

16. The vehicle of claim 10, wherein at least one of the airbag magnetic element or the magnetic guide element is formed with neodymium and induces a pull force of approximately 20 lbs to approximately 130 lbs.

17. A vehicle comprising:

a frame structure forming a cabin, the frame structure including a floor, a roof, and at least two side structures;

at least one seat mounted to the floor within the cabin;

an airbag module coupled to at least one of the frame structure or the at least one seat,

the airbag module including;

an airbag cushion;

an inflator coupled to the airbag cushion and configured to selectively provide air to inflate and deploy the airbag cushion from a stowed state into a deployed state; and

an airbag magnetic element coupled to the airbag cushion, the airbag magnetic element having a diameter; and

a magnetic guide element coupled to at least one of the frame structure or the at least one seat and arranged at a distance to the airbag magnetic element when the airbag cushion is in the stowed state, the magnetic guide element comprising a receiving portion forming a slot comprising;

an enlarged opening that is greater than the diameter of the airbag magnetic element, such that the airbag magnetic element may be initially directed trough the enlarged opening of the slot in a first normal direction as a result of magnetic attraction; and

two narrowed side sections on opposing sides of the enlarged opening, both of the narrowed side sections having a width that is less than the diameter of the airbag magnetic element, such that the airbag magnetic element, and thereby the airbag cushion, is held into place in an opposing normal direction, opposite the first normal direction, with lateral movement of the airbag magnetic element;

wherein, upon deployment of the airbag cushion, the airbag magnetic element and the magnetic guide element magnetically interact with one another to at least one of guide the airbag cushion in a predetermined direction or maintain the airbag cushion in a predetermined deployed position.

18. The vehicle of claim 17, wherein:

the airbag metallic element comprises;

a first magnetic section;

a second magnetic section; and

a neck connecting the first magnetic section and the second magnetic section; and

the enlarged opening allows passage of the first magnetic section, but not the second magnetic section, therethrough.

19. The vehicle of claim 18, wherein:

the first magnetic section has a first diameter;

the second magnetic section has a second diameter; and

the enlarged opening of the magnetic guide element is greater than the first diameter and less than the second diameter.

20. The vehicle of claim 18, wherein:

the first magnetic section comprises a sphere; and

the second magnetic shape comprises a rectangular prism.