Driver air bag apparatus for vehicle

1. A driver airbag apparatus for a vehicle, the driver airbag apparatus being located at a rear of a steering wheel having an obstacle at a center portion of the steering wheel and configured to deploy toward a front of the steering wheel while avoiding the obstacle, the driver airbag apparatus comprising:

an airbag cushion configured to inflate and deploy toward a front of a driver of the vehicle via a gap between the obstacle and the steering wheel when a gas is supplied to the airbag cushion;

a gas injector located below the airbag cushion and configured to supply the gas into the airbag cushion via a gas outlet; and

a diffuser configured to inflate and deploy within the airbag cushion when the gas is supplied to the diffuser, the diffuser at least partially covering the gas outlet, having an opening at a front portion of the diffuser, and configured to guide the gas supplied from the gas injector via the gas outlet toward the front of the driver of the vehicle.

2. The driver airbag apparatus of claim 1 , wherein:

the diffuser has first and second end portions, and the first end portion of the diffusor is folded toward the second end portion of the diffuser to form a first folded portion, and

the first folded portion is configured to deploy toward a front portion of the airbag cushion when the gas is supplied to the diffuser.

3. The driver airbag apparatus of claim 2 , wherein:

the second end portion of the diffuser is folded toward the first end of the diffuser to form a second folded portion, and

the second folded portion is configured to deploy upwardly when the gas is supplied to the diffuser.

4. The driver airbag apparatus of claim 3 , wherein the second end portion of the diffuser has first and second side portions expanding outward with respect to a longitudinal direction of the diffuser.

5. The driver airbag apparatus of claim 4 , wherein the second folded portion has an inner space having a dome shape.

6. The driver airbag apparatus of claim 1 , wherein the diffuser comprises:

a first folded portion located at a first end of the diffuser and at least partially overlapping the gas outlet; and

a second folded portion located at a second end of the diffuser and spaced apart from the first folded portion of the diffuser.

7. The driver airbag apparatus of claim 1 , wherein the diffuser has a portion connected to an upper portion of the airbag cushion.

8. The driver airbag apparatus of claim 1 , wherein the diffuser comprises:

a first end portion configured to form, when deployed, a shape having a first height corresponding to a second height of the obstacle; and

a second end portion configured to deploy upwardly within the airbag cushion.

9. The driver airbag apparatus of claim 1 , wherein:

the diffuser has a gas inlet located between first and second end portions thereof,

the gas outlet is connected to the gas inlet, and

the diffuser has a portion coupled to an upper portion of the airbag cushion.

10. The driver airbag apparatus of claim 1 , wherein the obstacle comprises a display device mounted to the steering wheel.

11. A driver airbag apparatus for a vehicle, the driver airbag apparatus being located at a rear of a steering wheel having an obstacle at a center portion of the steering wheel and configured to deploy toward a front of the steering wheel while avoiding the obstacle, the driver airbag apparatus comprising:

an airbag cushion configured to deploy toward a front of a driver of the vehicle via a gap between the obstacle and the steering wheel when a gas is supplied to the airbag cushion;

a gas injector located below the airbag cushion and configured to supply the gas into the airbag cushion via a gas outlet;

a diffuser configured to deploy within the airbag cushion when the gas is supplied to the diffuser, the diffuser at least partially covering the gas outlet, having an opening at a front portion of the diffuser, and configured to guide the gas supplied from the gas injector via the gas outlet toward the front of the driver of the vehicle;

an airbag housing located at the rear of the steering wheel and having an inner storage space for storing the airbag cushion and a top opening exposing the inner storage space; and

an airbag cover configured to cover the top opening of the airbag housing and having a front end configured to rotate upwardly with respect to a rear end thereof when the airbag cushion is deployed, the airbag cover comprising a pair of sidewalls extending vertically on both sides of the airbag housing, respectively.

12. The driver airbag apparatus of claim 11 , wherein the airbag cover further comprises a coupling portion configured to couple the rear end of the airbag cover and the airbag housing.

13. The driver airbag apparatus of claim 12 , wherein the airbag cover further comprises a hinge portion located at an upper portion of the coupling portion and configured to rotate the airbag cover to allow the front end of the airbag cover to move upwardly when the airbag cushion is deployed.

14. The driver airbag apparatus of claim 11 , wherein the sidewalls are configured to prevent an interference between the sidewalls and the airbag housing when the airbag cover rotates.

15. The driver airbag apparatus of claim 11 , wherein the airbag cover further comprises a reinforcement portion configured to reinforce a coupling between the pair of sidewalls and the airbag cover.

16. The driver airbag apparatus of claim 11 , wherein the airbag cover is configured to prevent the airbag cushion from deploying away from the front of the driver of the vehicle.

17. The driver airbag apparatus of claim 11 , wherein the airbag cover further comprises a tear line extending in a longitudinal direction of the vehicle.

18. The driver airbag apparatus of claim 11 , wherein:

the airbag cover further comprises a locking protrusion located on an outer surface of the sidewall,

airbag housing comprises a locking groove configured to engage the locking protrusion, and

the locking protrusion is disengaged from the locking groove when the airbag cushion is deployed.