Curtain airbag apparatus

A curtain airbag apparatus for a vehicle, the curtain airbag apparatus comprising:

• an airbag cushion comprising a first main chamber, a second main chamber, and a third main chamber respectively arranged in a first-row area, a second-row area, and a third-row area in the vehicle;
• an extra chamber arranged or disposed between the second main chamber and the third main chamber;
• and
• a diffuser coupled to the airbag cushion and is configured, upon deployment of the airbag cushion, to:
• distribute gas directed towards the first main chamber and the second main chamber;
• and
• distribute gas from the second main chamber to the third main chamber,
• wherein the extra chamber is configured to pull the third main chamber downward to increase airflow from the second chamber and accelerate deployment of the third main chamber,
• wherein the curtain airbag apparatus is configured to be installed between a plurality of pillar trims in the vehicle,
• wherein the third main chamber comprises:
• a first inflation portion configured to be inflated by gas distributed through the diffuser during deployment of the airbag cushion;
• and
• a second inflation portion connected to the first inflation portion and configured to be inflated by gas flowing into the first inflation portion, and
• wherein the second inflation portion is configured to maintain a folded state inside the first inflation portion before deployment of the airbag cushion.