Side airbag device

1 . A side airbag device comprising:

an airbag cushion configured, when supplied with gas, to inflate and deploy between a driver seat and a passenger seat of a vehicle; and

an inflator disposed within the airbag cushion and mounted on a mount disposed in a rear end portion of the airbag cushion,

wherein the airbag cushion includes a restraining portion configured to restrain movement of an occupant of the vehicle, the restraining portion disposed corresponding to a shoulder of the occupant and configured not to be inflated when the airbag cushion is inflated by the gas, and

wherein the restraining portion longitudinally extends parallel to a longitudinal direction of the airbag cushion.

2 . The side airbag device of claim 1 , wherein:

the restraining portion includes a first restraining portion and a second restraining portion that longitudinally extend parallel to the longitudinal direction of the airbag cushion, and

a gas passage through which the gas passes is provided between the first restraining portion and the second restraining portion.

3 . The side airbag device of claim 2 , wherein each of the first restraining portion and the second restraining portion has a structure of which a width decreases from an upper portion toward a lower portion of the airbag cushion.

4 . A side airbag device comprising:

an airbag cushion configured, when supplied with gas, to inflate and deploy between a driver seat and a passenger seat of a vehicle; and

an inflator disposed within the airbag cushion and mounted on a mount disposed in a rear end portion of the airbag cushion,

wherein the airbag cushion includes a restraining portion disposed at a position corresponding to a shoulder of an occupant of the vehicle and configured to restrain movement of the occupant in a state in which the restraining portion is not inflated by the gas,

wherein the restraining portion includes a first restraining portion and a second restraining portion that extend in a longitudinal direction of the airbag cushion,

wherein a gas passage through which the gas passes is provided between the first restraining portion and the second restraining portion, and

wherein the side airbag device further comprises a sub-cushion attached to a surface of the airbag cushion facing the passenger seat and protruding from the airbag cushion when inflated by the gas.

5 . The side airbag device of claim 4 , wherein:

the sub-cushion overlaps the gas passage, and

a gas hole, which is connected to the sub-cushion, is formed in the surface of the airbag cushion facing the passenger seat.

6 . The side airbag device of claim 4 , wherein, when fully inflated, the sub-cushion has a thickness smaller than that of the airbag cushion.

7 . The side airbag device of claim 1 , wherein the restraining portion has a structure surrounded by a sewing line that joins a plurality of panels constituting the airbag cushion.

8 . The side airbag device of claim 1 , further comprising a tether that passes through the airbag cushion to be connected to the airbag cushion.

9 . The side airbag device of claim 8 , wherein the airbag cushion has a tether hole through which the tether passes.

10 . A side airbag device of claim 9 , comprising:

an airbag cushion configured, when supplied with gas, to inflate and deploy between a driver seat and a passenger seat of a vehicle; and

an inflator disposed within the airbag cushion and mounted on a mount disposed in a rear end portion of the airbag cushion,

wherein the airbag cushion includes a restraining portion disposed at a position corresponding to a shoulder of an occupant of the vehicle and configured to restrain movement of the occupant in a state in which the restraining portion is not inflated by the gas,

wherein the side airbag device further comprises a tether that passes through the airbag cushion to be connected to the airbag cushion,

wherein the airbag cushion has a tether hole through which the tether passes, and

wherein the airbag cushion includes:

an inner non-inflatable portion located at a center of a chamber that is surrounded by a sewing line and configured to be inflated when supplied with the gas, and

an outer non-inflatable portion disposed outside the chamber,

wherein the tether hole is located in each of the inner non-inflatable portion and the outer non-inflatable portion.

11 . The side airbag device of claim 1 , wherein the restraining portion has a sunken groove structure.

12 . The side airbag device of claim 1 , wherein the restraining portion is positioned behind a vertical center line that divides the airbag cushion into two in a width direction.

13 . The side airbag device of claim 12 , wherein the restraining portion is positioned at a rear end portion of the airbag cushion.