Side airbag for vehicle
A side airbag for a vehicle is provided. The side airbag includes an airbag cushion and a diffuser that is configured to diffuse gas within the interior of the airbag cushion. A vent aperture is configured to communicate within an interior of the airbag cushion to an exterior of the airbag cushion. A first seam line is formed in a shape that obstructs the vent aperture.
1. A side airbag for a vehicle, comprising:
an airbag cushion disposed between an occupant and a door trim;
a diffuser disposed at a first side of the airbag cushion, and configured to diffuse gas supplied from an inflator within the airbag cushion;
a vent aperture disposed at a second side of the airbag cushion, and configured to communicate within an interior of the airbag cushion to an exterior thereof;
a first seam line spaced apart from the vent aperture by a predetermined distance in a direction toward the diffuser, and formed in a shape that obstructs the vent aperture;
a second seam line spaced apart from the first seam line by a predetermined distance in a direction toward the diffuser, and formed in a shape that obstructs a second end of the first seam line; and
a third seam line that crosses the airbag cushion in a direction from the diffuser to a position below the vent aperture and separates the airbag cushion into upper and lower portions,
wherein a seamed portion of the second seam line is separated when a force equal to or greater than a predetermined level is applied to the second seam line such that the gas is vented out by making a detour toward a position below the first seam line after the cushion is inflated, the force being generated by an inflation pressure of the airbag cushion.
2. The side airbag of claim 1 , wherein a first end of the first seam line coincides with an outer seam line of the airbag cushion.
3. The side airbag of claim 2 , wherein the first end of the first seam line coincides with the outer seam line of the airbag cushion at a position above the vent aperture, and a second end of the first seam line is spaced apart from the vent aperture by a predetermined distance in the direction toward the diffuser.
4. The side airbag of claim 1 , wherein when the airbag cushion is fully inflated, the vent aperture is disposed between the door trim and an armrest.
5. The side airbag of claim 1 , wherein the airbag cushion is configured to be inflated from a side portion of a seatback, and a size of the airbag cushion corresponds to a length of the seatback.