Front Seat Airbag Device, Method for Controlling Front Seat Airbag Device, and Method for Folding Airbag

Content Provider	The Lens
Abstract	A front seat airbag device includes an inflator configured to operate and generate gas when a frontal collision of a vehicle is detected or predicted and an airbag configured to include a main chamber stored in front of a front seat in the vehicle, inflation-deployed by the gas being supplied from the inflator, and inflation-deployed to a position facing the front seat and a parietal chamber inflation-deployed upward and rearward from an upper end portion of the main chamber.
Related Links	https://www.lens.org/lens/patent/011-510-527-222-144/frontpage
Language	English
Publisher Date	2019-01-17
Access Restriction	Open
Content Type	Text
Resource Type	Patent
Jurisdiction	United States of America
Date Applied	2018-06-14
Applicant	Toyota Motor Co Ltd
Application No.	201816008700
Claim	A front seat airbag device comprising: an inflator configured to generate gas when a frontal collision of a vehicle is detected or predicted; and an airbag configured to include a main chamber stored in front of a front seat in the vehicle, the main chamber being configured to inflate and deploy to a position facing the front seat by the gas being supplied from the inflator, and a parietal chamber configured to inflate and deploy upward and rearward from an upper end portion of the main chamber. The front seat airbag device according to claim 1 , wherein: the inflator is connected to the main chamber; the front seat airbag device further comprises a partition portion partitioning the parietal chamber and the main chamber from each other; and the partition portion has a communication hole allowing the parietal chamber and the main chamber to communicate with each other. The front seat airbag device according to claim 2 , wherein a plurality of the communication holes is provided bilaterally symmetrical with respect to a vehicle width direction middle portion of the airbag. The front seat airbag device according to claim 1 , further comprising a tension member connecting a lower portion of the main chamber and an upper portion of the parietal chamber, wherein a length of the tension member is set such that tension acts on the tension member in an inflation deployment state of the airbag. The front seat airbag device according to claim 4 , wherein the tension member is configured to include a wide tension cloth facing the front seat in the inflation deployment state of the airbag. The front seat airbag device according to claim 5 , wherein a width of an upper end portion of the wide tension cloth is longer than a width of a lower end portion of the wide tension cloth in an inflation deployment state of the wide tension cloth. The front seat airbag device according to claim 5 , wherein the upper end portion of the wide tension cloth is sewn and connected to an upper side of the parietal chamber and a lower end portion of the wide tension cloth is sewn and connected to a lower side of the main chamber. The front seat airbag device according to claim 4 , wherein the tension member is configured to include a pair of right and left narrow tension cloths connecting vehicle width direction end portions of the main chamber and the parietal chamber to each other in the inflation deployment state of the airbag. The front seat airbag device according to claim 1 , wherein the parietal chamber is provided with an expansion portion expanding in a vehicle width direction with respect to the main chamber when the parietal chamber is in an inflated and deployed state. The front seat airbag device according to claim 1 , wherein the parietal chamber has a vent hole communicating with an outside. A method for controlling the front seat airbag device according to claim 1 , the method comprising controlling an amount of gas supply from the inflator to the airbag such that an internal pressure of the main chamber is higher in a case where the front seat faces rearward than in a case where the front seat faces forward when the frontal collision of the vehicle is detected or predicted. The method according to claim 11 , wherein the control includes: generating the gas from a first gas generation unit and a second gas generation unit in the inflator in a case where the front seat faces rearward when the frontal collision of the vehicle is detected or predicted; and generating the gas from one of the first gas generation unit and the second gas generation unit in the inflator in a case where the front seat faces forward when the frontal collision of the vehicle is detected or predicted. A method for folding the airbag constituting the front seat airbag device according to claim 1 , the method comprising: folding each of a right and a left of the main chamber and the parietal chamber in a pre-folding state in a bellows shape, a polygonal line of the bellow shape extending in an up-down direction; folding each of a top and a bottom of the main chamber in a bellows shape such that the main chamber faces the front seat in an inflation deployment state of the airbag, a polygonal line of the bellow shape extending in a right-left direction after the folding of each of a right and a left of the main chamber and the parietal chamber; and disposing the parietal chamber on the main chamber after the parietal chamber is folded in a bellows shape, a polygonal line of the bellows shape extending in the right-left direction or folded in a roll shape from an upper end toward a lower end such that the parietal chamber faces the front seat in the inflation deployment state of the airbag after the folding of each of a top and a bottom of the main chamber. A method for folding the airbag constituting the front seat airbag device according to claim 1 , the method comprising: folding each of a right and a left of the main chamber and the parietal chamber in a pre-folding state in a bellows shape, a polygonal line of the bellow shape extending in an up-down direction; folding the main chamber in a roll shape from an upper end toward a lower end such that the main chamber faces the front seat in an inflation deployment state of the airbag and disposing the main chamber on the inflator after the folding of each of a right and a left of the main chamber and the parietal chamber; and folding the parietal chamber in a roll shape from an upper end toward a lower end such that the parietal chamber faces the front seat in the inflation deployment state of the airbag and disposing the parietal chamber on the main chamber folded in the roll shape after the folding of the main chamber.
CPC Classification	Vehicles; Vehicle Fittings; Or Vehicle Parts; Not Otherwise Provided For Seats Specially Adapted For Vehicles;Vehicle Passenger Accommodation Not Otherwise Provided For
Extended Family	119-838-842-265-326 004-314-430-436-603 011-510-527-222-144 041-208-704-510-368 058-579-671-757-662 024-644-959-284-408 006-512-299-551-429 015-529-115-490-439
Patent ID	20190016294
Inventor/Author	Hayashi Shigeki
IPC	B60R21/237 B60R21/015 B60R21/233 B60R21/2338 B60R21/239
Status	Active
Owner	Toyota Jidosha Kabushiki Kaisha
Simple Family	058-579-671-757-662 004-314-430-436-603 011-510-527-222-144 041-208-704-510-368 119-838-842-265-326 024-644-959-284-408 006-512-299-551-429 015-529-115-490-439
CPC (with Group)	B60R21/231 B60N2/28 B60R21/20 B60R21/237 B60R21/233 B60R21/2338 B60R2021/23308 B60R2021/23324 B60R2021/23386 B60R21/01554 B60R21/239 B60R2021/0004
Issuing Authority	United States Patent and Trademark Office (USPTO)
Kind	Patent Application Publication