Vehicular Curtain Air-Bag Device, and Mounting Structure for Same

A vehicular curtain airbag apparatus having a vehicular curtain airbag that is deployed and inflated along a side surface portion of a vehicle interior from an upper side to a lower side of the side surface portion, the vehicular curtain airbag apparatus comprising:

• a main chamber having a plurality of main chamber tabs disposed along an upper edge of the main chamber for attachment and fixation to the upper side of the side surface portion of the vehicle, a front end of the main chamber being enabled to be deployed and inflated downward at a position near a front pillar of the vehicle;
• an additional chamber positioned further toward a vehicle front side than the front end of the main chamber and enabled to be deployed and inflated, and separated from the main chamber by a partition portion set between the front pillar and an inflation area of a driver seat airbag or a passenger seat airbag;
• a communication portion formed in the partition portion so as to penetrate the partition portion thereby allowing the main chamber and the additional chamber to communicate with each other;
• and
• a first tab that allows a vicinity of an upper end of the partition portion to be attached and fixed to the vehicle when the additional chamber is folded back near the partition portion toward the vehicle interior and toward a rear of the vehicle so as to overlap the main chamber, wherein the first tab allows upper portions of front ends of both the additional chamber and the main chamber to be fixed to the vehicle when the additional chamber is folded back and the vehicular curtain airbag is deployed,
• wherein the additional chamber is deployed and inflated in a predetermined area in front of the inflation area of the driver seat airbag or the passenger seat airbag in the vehicle.

An attachment structure for a vehicular curtain airbag apparatus having a vehicular curtain airbag that is deployed and inflated along a side surface portion of a vehicle interior from an upper side to a lower side of the side surface portion, the attachment structure comprising:

• a main chamber having a plurality of tabs disposed along an upper edge of the main chamber for attachment and fixation to the upper side of the side surface portion of the vehicle, a front end of the main chamber being enabled to be deployed and inflated downward at a position near a front pillar of the vehicle;
• an additional chamber positioned further toward a vehicle front side than the front end of the main chamber and enabled to be deployed and inflated, and separated from the main chamber by a partition portion set between the front pillar and an inflation area of a driver seat airbag or a passenger seat airbag;
• a communication portion formed in the partition portion so as to penetrate the partition portion thereby allowing the main chamber and the additional chamber to communicate with each other;
• and
• a first tab that allows a vicinity of an upper end of the partition portion to be attached and fixed to the vehicle when the additional chamber is folded back near the partition portion toward the vehicle interior and toward a rear of the vehicle so as to overlap the main chamber,
• wherein, to allow the additional chamber to be deployed and inflated in a predetermined area in front of the inflation area of the driver seat airbag or the passenger seat airbag in the vehicle, the main chamber is attached and fixed to the vehicle with the plurality of main chamber tabs, and the vicinity of the upper end of the partition portion is attached and fixed to the vehicle with the first tab such that upper portions of front ends of both the additional chamber and the main chamber are fixed by the first tab to the vehicle with the additional chamber folded back.