Driving seat airbag device

1. A driving seat airbag device, comprising:

a driving seat airbag that is inflated and deployed at a vehicle rear side of a steering wheel on being supplied with gas; and

a sliding cloth that is deployed in conjunction with inflation and deployment of the driving seat airbag, that covers an airbag rear face at a vehicle rear side of the driving seat airbag, and that is capable of movement in a vehicle width direction with respect to the airbag rear face,

wherein a space between the sliding cloth and the airbag rear face of the driving seat airbag is free of a connection to an interior of the driving seat airbag,

wherein the sliding cloth covers the airbag rear face of the driving seat airbag in an inflated and expanded state of the driving seat airbag, and

wherein an opening that exposes a central region of the airbag rear face is formed in the sliding cloth.

2. The driving seat airbag device of claim 1 , wherein:

an outer peripheral section of the driving seat airbag is inflated and deployed further toward an outer side than a rim of the steering wheel as viewed from an axial direction of the steering wheel;

an outer peripheral section of the sliding cloth is joined to the outer peripheral section of the driving seat airbag; and

the opening is disposed at an inner side of the rim as viewed from the axial direction of the steering wheel.

3. The driving seat airbag device of claim 2 , wherein the sliding cloth covers the deployed airbag rear face from the inner side across to the outer side of the rim as viewed from the axial direction of the steering wheel.

4. The driving seat airbag device of claim 1 , wherein a plurality of slits are formed in the sliding cloth.

5. The driving seat airbag device of claim 4 , wherein each of the plurality of slits extends from a center side toward an outer peripheral side of the steering wheel and are disposed along a circumferential direction of the steering wheel.

6. The driving seat airbag device of claim 4 , wherein at least one slit of the plurality of slits configures an inner side slit extending out from a peripheral edge of the opening toward a radial direction outer side of the steering wheel.

7. The driving seat airbag device of claim 6 , wherein one or more of the plurality of slits configures an outer side slit that is disposed further toward an outer peripheral side of the steering wheel than the inner side slit, and that extends in a radial direction of the steering wheel.

8. The driving seat airbag device of claim 7 , wherein the inner side slit and the outer side slit are disposed offset from each other in a circumferential direction of the steering wheel.

9. The driving seat airbag device of claim 8 , wherein:

a plurality of the inner side slits are disposed along the circumferential direction of the steering wheel; and

the one or more outer side slits extend out toward the radial direction outer side of the steering wheel from between adjacent slits of the inner side slits.

10. The driving seat airbag device of claim 1 , wherein an elongation ratio of the sliding cloth is higher than an elongation ratio of an occupant-side base cloth that forms the airbag rear face.

11. A driving seat airbag device, comprising:

a driving seat airbag that is inflated and deployed at a vehicle rear side of a steering wheel on being supplied with gas; and

a sliding cloth that is deployed in conjunction with inflation and deployment of the driving seat airbag, that covers an airbag rear face at a vehicle rear side of the driving seat airbag, and that is capable of movement in a vehicle width direction with respect to the airbag rear face,

wherein a space between the sliding cloth and the airbag rear face of the driving seat airbag is free of a connection to an interior of the driving seat airbag,

wherein the sliding cloth covers the airbag rear face of the driving seat airbag in an inflated and expanded state of the driving seat airbag, and

wherein a plurality of slits are formed in the sliding cloth.

12. The driving seat airbag device of claim 11 , wherein the plurality of slits extend from a center side toward an outer peripheral side of the steering wheel and are disposed along a circumferential direction of the steering wheel.

13. The driving seat airbag device of claim 11 , wherein a coefficient of friction of a contact face of the sliding cloth that contacts the airbag rear face is lower than a coefficient of friction of the airbag rear face.

14. A driving seat airbag device, comprising:

a driving seat airbag that is inflated and deployed at a vehicle rear side of a steering wheel on being supplied with gas; and

a sliding cloth that is deployed in conjunction with inflation and deployment of the driving seat airbag, that covers an airbag rear face at a vehicle rear side of the driving seat airbag, and that is capable of movement in a vehicle width direction with respect to the airbag rear face,

wherein a space between the sliding cloth and the airbag rear face of the driving seat airbag is free of a connection to an interior of the driving seat airbag,

wherein the sliding cloth covers the airbag rear face of the driving seat airbag in an inflated and expanded state of the driving seat airbag,

wherein the driving seat airbag is inflated and deployed in a circular shape as viewed from an axial direction of the steering wheel, and

wherein the sliding cloth is deployed in a circular ring shape as viewed from the axial direction of the steering wheel.