Side airbag device

1. A side airbag device disposed between a vehicle body and a seat, the side airbag device comprising:

an airbag;

an inflator configured to supply the airbag with gas;

a base member configured to accommodate the airbag and the inflator, and to be fixed to the vehicle body; and

an outer covering member configured to cover at least a front side of the base member, the outer covering including an interior surface facing frontward, and the interior surface being laid over the front side of the base member,

wherein the base member comprises:

an inner portion located laterally farther inward within the vehicle body relative to the airbag;

an outer portion located laterally farther outward within the vehicle body relative to the airbag;

a rear portion located farther rearward relative to the airbag with respect to a front-rear direction of the seat, the rear portion connecting the inner portion and the outer portion; and

a bridging portion made of a metal rod, and located apart from and farther frontward relative to the rear portion, the bridging portion connecting the inner portion and the outer portion,

wherein the outer portion extends from the rear portion frontward beyond the bridging portion, the inner portion extends from the rear portion frontward beyond the bridging portion, and front edge portions of the outer portion and the inner portion are separate from each other.

2. The side airbag device according to claim 1 , wherein the bridging portion includes a first bridging portion connecting an upper portion of the outer portion and an upper portion of the inner portion, the first bridging portion being located apart from and farther frontward relative to the rear portion.

3. The side airbag device according to claim 1 , wherein the bridging portion includes a second bridging portion connecting a lower portion of the outer portion and a lower portion of the inner portion.

4. The side airbag device according to claim 1 , wherein the bridging portion includes:

a first bridging portion connecting an upper portion of the outer portion and an upper portion of the inner portion, and

a second bridging portion connecting a lower portion of the outer portion and a lower portion of the inner portion,

wherein the first bridging portion and the second bridging portion are located apart from and farther frontward relative to the rear portion.

5. The side airbag device according to claim 1 ,

wherein the inflator includes a cylindrical main body and a bolt provided protrusively from the main body, and

wherein the bridging portion is located farther, than a center of the main body, away from the interior surface.

6. The side airbag device according to claim 5 , wherein the bridging portion is located farther, than every part of the main body, away from the interior surface.

7. The side airbag device according to claim 1 , further comprising:

a mounting bracket that includes an inflator fixing portion to which the inflator is fixed; and

a base member fixing portion that is located in a position different from a position of the inflator fixing portion and fixed to the base member,

wherein the inflator fixing portion has an inflator fixing hole through which a bolt of the inflator is disposed, and

wherein the bridging portion is located farther, than the inflator fixing hole, away from the interior surface.

8. The side airbag device according to claim 1 ,

wherein the base member includes a wire frame made of a metal rod,

wherein the wire frame includes an outer wire frame making up at least part of the outer portion, and an inner wire frame making up at least part of the inner portion, and

wherein the bridging portion connects the outer wire frame and the inner wire frame.