초록 ▼

A curtain airbag apparatus is provided with a curtain airbag that is embedded, in a folded or rolled state, in an upper edge portion of at least one door opening and deploys into a form of a curtain, the curtain airbag having: a first deployment portion deploying downward by inflating with gas suppl

A curtain airbag apparatus is provided with a curtain airbag that is embedded, in a folded or rolled state, in an upper edge portion of at least one door opening and deploys into a form of a curtain, the curtain airbag having: a first deployment portion deploying downward by inflating with gas supplied from upon a side collision and rollover of the vehicle; a second deployment portion deploying downward by inflating with gas supplied at least upon a rollover of the vehicle, such that the second deployment portion is located in an area that does not overlap, as viewed laterally, an area in which the first deployment portion is located; and an internal pressure difference creator that makes an internal pressure of the second deployment portion higher than an internal pressure of the first deployment portion at least upon a rollover of the vehicle.

대표청구항 ▼

1. A curtain airbag apparatus comprising: a curtain airbag that is embedded, in a folded or rolled state, in an upper edge portion of at least one door opening of a vehicle body and deploys into a form of a curtain, the curtain airbag having a first deployment portion that deploys toward a lower sid

1. A curtain airbag apparatus comprising: a curtain airbag that is embedded, in a folded or rolled state, in an upper edge portion of at least one door opening of a vehicle body and deploys into a form of a curtain, the curtain airbag having a first deployment portion that deploys toward a lower side of a vehicle from the upper edge portion of the vehicle by inflating with gas supplied upon a side collision of the vehicle and upon a rollover of the vehicle, and a second deployment portion that deploys toward the lower side of the vehicle from the upper edge portion of the door opening by inflating with gas supplied at least upon a rollover of the vehicle, such that the second deployment portion is located in an area that does not overlap, as viewed laterally, an area in which the first deployment portion is located, the second deployment portion deploys into an elongated generally columnar shape, the generally columnar shape having an axis the extends substantially vertically when viewed laterally on the vehicle, the second deployment portion having an upper edge and a lower edge, as viewed laterally, the upper edge of the secondary deployment portion overlaps a front pillar of the vehicle, the lower edge of the secondary deployment portion is located lower than a beltline of the vehicle, the lower edge overlapping a front portion of a front side door of the vehicle;a gas generator that generates the gas to be fed to the first deployment portion and the second deployment portion; andan internal pressure difference creator that makes an internal pressure of the second deployment portion higher than an internal pressure of the first deployment portion at least upon a rollover of the vehicle. 2. The curtain airbag apparatus according to claim 1, wherein the internal pressure difference creator is provided with a first gas feed portion via which the gas generator feeds the gas to the first deployment portion and a second gas feed portion via which the gas generator feeds the gas to the second deployment portion and at which a gas flow resistance is lower than a gas flow resistance at the first gas feed portion. 3. The curtain airbag apparatus according to claim 1, wherein the gas generator is provided with a first gas generation portion that generates the gas to be fed to the first deployment portion and a second gas generation portion that generates the gas to be fed to the second deployment portion, andthe internal pressure difference creator is provided with a first gas feed portion via which the gas is, upon a side collision of the vehicle and upon a rollover of the vehicle, fed to the first deployment portion from the first gas generation portion and a second gas feed portion via which the gas, upon a rollover of the vehicle, is fed to the second deployment portion from the second gas generation portion such that the internal pressure of the second deployment portion becomes higher than the internal pressure of the first deployment portion. 4. The curtain airbag apparatus according to claim 3, wherein upon a side collision of the vehicle, the second gas generation portion is activated a predetermined time after the first gas generation portion is activated. 5. The curtain airbag apparatus according to claim 1, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and the second deployment portion deploys to an area in front of the first deployment portion. 6. The curtain airbag apparatus according to claim 1, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and a rear deployment portion that deploys so as to overlap a middle pillar of the vehicle, as viewed laterally, is provided at or on a rear side of the first deployment portion. 7. The curtain airbag apparatus according to claim 1, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, anda delayed-deployment portion is provided which deploys, with a time lag from the first deployment portion, to an area below the first deployment portion by being supplied with gas from the first deployment portion via a narrowed passage, such that the delayed-deployment portion overlaps, as viewed laterally, a side door of the vehicle and an upper portion of a side airbag. 8. A curtain airbag apparatus comprising: a curtain airbag that is embedded, in a folded or rolled state, in an upper edge portion of at least one door opening of a vehicle body and deploys into a form of a curtain, the curtain airbag having a first deployment portion that deploys toward a lower side of a vehicle from the upper edge portion of the vehicle by inflating with gas supplied upon a side collision of the vehicle and upon a rollover of the vehicle, and a second deployment portion that deploys toward the lower side of the vehicle from the upper edge portion of the door opening by inflating with gas supplied at least upon a rollover of the vehicle, such that the second deployment portion is located in an area that does not overlap, as viewed laterally, an area in which the first deployment portion is located, the second deployment portion deploys into an elongated generally columnar shape, the generally columnar shape having an axis the extends substantially vertically when viewed laterally on the vehicle, the second deployment portion having an upper edge and a lower edge, as viewed laterally, the upper edge of the secondary deployment portion overlaps a front pillar of the vehicle, the lower edge of the secondary deployment portion is located lower than a beltline of the vehicle, the lower edge overlapping a front portion of a front side door of the vehicle;a gas generator that generates gas upon a side collision of the vehicle and upon a rollover of the vehicle; anda first gas feed passage via which the gas generator feeds the gas to the first deployment portion; anda second gas feed passage via which the gas generator feeds the gas to the second deployment portion and which is larger in cross-sectional passage area than the first gas feed passage. 9. The curtain airbag apparatus according to claim 8, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and the second deployment portion deploys to an area in front of the first deployment portion. 10. The curtain airbag apparatus according to claim 8 wherein the second gas feed passage has a one-way valve that allows gas to be fed to the second deployment portion via the second gas feed passage, and that inhibits gas from being discharged from the second deployment portion via the second gas feed passage. 11. The curtain airbag apparatus according to claim 10 wherein: the second gas feed passage includes a tubular piece via which the gas generator feeds the gas to the second deployment portion, the tubular piece is folded or rolled together with the first deployment portion and the second deployment portion; andthe one-way valve is formed by a downstream end portion of the tubular piece being put into the second deployment portion. 12. The curtain airbag apparatus according to claim 10 wherein the first gas feed passage and the second gas feed passage are defined by a tubular piece, and the first deployment portion and the second deployment portion are partitioned off from each other and communicate with each other via the tubular piece. 13. The curtain airbag apparatus according to claim 8, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and a rear deployment portion that deploys so as to overlap a middle pillar of the vehicle, as viewed laterally, is provided at or on a rear side of the first deployment portion. 14. The curtain airbag apparatus according to claim 8, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and a delayed-deployment portion is provided which deploys, with a time lag from the first deployment portion, to an area below the first deployment portion by being supplied with gas from the first deployment portion via a narrowed passage, such that the delayed-deployment portion overlaps, as viewed laterally, a side door of the vehicle and an upper portion of a side airbag. 15. A curtain airbag apparatus comprising: a curtain airbag that is embedded, in a folded or rolled state, in an upper edge portion of at least one door opening of a vehicle body and deploys into a form of a curtain, the curtain airbag having a first deployment portion that deploys toward a lower side of a vehicle from the upper edge portion of the vehicle by inflating with gas supplied upon a side collision of the vehicle and upon a rollover of the vehicle, and a second deployment portion that deploys toward the lower side of the vehicle from the upper edge portion of the door opening by inflating with gas supplied at least upon a rollover of the vehicle, such that the second deployment portion is located in an area that does not overlap, as viewed laterally, an area in which the first deployment portion is located;a first gas generation portion that generates, upon a side collision of the vehicle and upon a rollover of the vehicle, the gas to be fed to the first deployment portion; anda second gas generation portion that generates, upon a rollover of the vehicle, the gas to be fed to the second deployment portion such that an internal pressure of the second deployment portion becomes higher than an internal pressure of the first deployment portion. 16. The curtain airbag apparatus according to claim 15, wherein upon a side collision of the vehicle, the second gas generation portion is activated a predetermined time after the first gas generation portion is activated. 17. The curtain airbag apparatus according to claim 15, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and the second deployment portion deploys to an area in front of the first deployment portion such that a lower end portion of the second deployment portion overlaps a side door of the vehicle, as viewed laterally. 18. The curtain airbag apparatus according to claim 17, wherein the first deployment portion deploys to an area on the outer side, in the lateral direction of the vehicle, of a head of a passenger on a front seat of the vehicle, and the second deployment portion deploys to an area in front of the first deployment portion such that an upper end portion of the second deployment portion overlaps a front pillar of the vehicle, as viewed laterally. 19. The curtain airbag apparatus according to claim 15, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and a rear deployment portion that deploys so as to overlap a middle pillar of the vehicle, as viewed laterally, is provided at or on a rear side of the first deployment portion. 20. The curtain airbag apparatus according to claim 15, wherein the first deployment portion deploys to an area on an outer side, in a lateral direction of the vehicle, of a head of a passenger, and a delayed-deployment portion is provided which deploys, with a time lag from the first deployment portion, to an area below the first deployment portion by being supplied with gas from the first deployment portion via a narrowed passage, such that the delayed-deployment portion overlaps, as viewed laterally, a side door of the vehicle and an upper portion of a side airbag.