JP2005041460A - Air bag device for back seat and air bag system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for a back seat capable of certainly protecting an occupant seated on the back seat from impact applied to a vehicle from the side in addition to impact applied from the rear. <P>SOLUTION: A rear head air bag 24 is stored in a roof in such a way as to surround the back seat 23 from the rear and left and right sides of it in a folded state. The rear head air bag 24 is furnished with a rear part expanding part 24c to deploy in an indoor rear part in correspondence with the occupant seated in the back seat 23 and left and right side expanding parts 24d provided in such a way as to continue from both left and right side parts of the rear part expanding part 24c and to deploy in a state to cover the whole of a quarter window 29 in correspondence with an area to the front of a front end position of a seat part 23a of the back seat 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rear seat airbag device for protecting a rear seat occupant, and an airbag system including the rear seat airbag device. Here, the rear seat means a rearmost seat of a vehicle having a plurality of rows of seats (for example, a minivan) or a seat of a vehicle having only one row of seats (for example, a sports car).

  As this type of rear seat airbag device, the present applicant has proposed an airbag device that inflates and deploys an airbag from the rear end of a vehicle roof to the rear of the rear seat (see Patent Document 1). However, this airbag device only inflates and deploys so as to partition the rear seat and the rear window glass, and does not correspond to a side collision of another vehicle with respect to the own vehicle.

In addition, as a rear seat airbag device for protecting the rear seat occupant, airbags embedded in the left and right ends of the rear shelf are respectively disposed between the rear seat and the door and the rear seat on the left and right sides of the rear seat. And a rear portion of the passenger compartment expand in a substantially plane L shape (see, for example, Patent Document 2).
JP 2002-362284 A Japanese Utility Model Publication No. 64-7053

  By the way, the rear seat airbag device described in Patent Document 2 is configured to deploy airbags embedded in both right and left ends of the rear shelf, assuming a rear-end collision or a side-impact accident with respect to the rear portion of the vehicle body. And in the right and left sides of the rear seat, the airbag only deploys corresponding to only the rear part of the rear door window. Therefore, the airbag device for the rear seat may not be able to cope with a side collision with the rear part of the vehicle body as well as a side collision of the other vehicle with respect to the center part of the vehicle body.

  In recent years, the number of 7- or 8-seater passenger cars with three rows of seats has increased. As an airbag system for such a vehicle, it is conceivable to provide a curtain airbag device that expands so as to correspond to the front door window, the rear door window, and the quarter window, in addition to the airbag device for the rear seat.

  However, the curtain airbag device that covers three rows of seats has a larger volume than that of two rows of seats and requires a large amount of gas to deploy, so a large inflator or multiple inflators are required. Therefore, it becomes difficult to mount it inside the roof or pillar. Moreover, in order to make the time required for the deployment operation of the curtain airbag device for the three-row seat to be about the same as that for the two-row seat, the deployment speed needs to be higher than that for the two-row seat. Need.

  Alternatively, a dedicated curtain airbag may be provided for each of the front seat, the middle seat, and the rear seat, but in this case, since each airbag requires an inflator, the structure for housing becomes complicated. .

  A first object of the present invention is to provide a rear seat airbag device that can more reliably protect a passenger seated in a rear seat from an impact applied from the side in addition to an impact applied to the vehicle from the rear. Another object of the present invention is to provide an airbag system including the airbag device for the rear seat.

  A second object is an air bag system for protecting passengers from the front seat to the rear seat in a vehicle having three rows of seats, which is easy to mount on the vehicle, and protects passengers. The object is to provide an airbag system that can achieve both at a higher level.

  In order to achieve the first object, an invention according to claim 1 is a rear seat airbag device including a rear seat airbag that is deployed in a vehicle compartment from a state of being accommodated in a vehicle roof. The rear seat airbag is provided so as to correspond to a passenger seated in the rear seat, and a rear inflating portion that is deployed in a rear portion of the passenger compartment, and is continuous to the left and right ends of the rear inflating portion. It has a side part inflating part developed in a compartment side part so that it may correspond to the range to the front including the seat front part end position of a seat.

  According to the first aspect of the present invention, when an impact is applied from behind to the vehicle, the rear inflating portion of the rear seat airbag that is deployed downward from the roof protects the occupant seated in the rear seat. . Further, when an impact is applied from the side to the vehicle, the left and right side inflating portions of the rear seat airbag that expands to correspond to the front range including the front end position of the seat portion of the rear seat, Protects passengers seated in the backseat in a wider area.

  According to a second aspect of the present invention, the rear seat airbag device according to the first aspect is accommodated in a roof at a side of a seat row in front of the rear seat, and is seated on a seat in the same seat row. And a front-seat airbag device having a curtain airbag that is deployed on the side of the passenger compartment so as to correspond to an occupant.

  According to the second aspect of the present invention, the rear seat air developed from the roof when an impact is applied to the rear portion of the vehicle body provided with the rear seat in a direction within a range from right behind to the left and right sides. The occupant seated in the rear seat can be protected by the bag. In addition, when a shock is applied from the side to the vehicle body part where the front seat is provided, the passenger seats in the seats in front of the rear seat by the curtain airbag deployed from inside the roof. Can be protected. Therefore, the rear seat occupant can be more reliably protected from the impact applied from the side in addition to the impact applied to the vehicle from the rear. In addition, it is possible to protect the occupant of the seat on the front side of the rear seat from an impact applied from the side to the vehicle body.

According to a third aspect of the present invention, in the second aspect of the present invention, the curtain airbag is composed of a pair of left and right deploying in the left and right sides of the passenger compartment.
According to the invention described in claim 3, in addition to the operation of the invention described in claim 2, an impact is applied from the left side or the right side to the vehicle body part provided with the front seat from the rear seat. Occasionally, a occupant seated in each seat on the front side of the rear seat can be protected by the curtain airbag deployed from the roof to the left side or the right side of the vehicle. Therefore, it is possible to protect the passenger in the seat on the front side of the rear seat from the impact applied to the vehicle body from the left side and the right side.

  According to a fourth aspect of the present invention, there is provided a rear inflator that supplies gas to the rear seat airbag and a curtain that is provided for each of the curtain airbags. A curtain inflator that supplies gas to the airbag is provided.

  According to the invention described in claim 4, in addition to the action of the invention described in claim 2 or claim 3, the following action is provided. A large-capacity curtain air bag for a plurality of seat rows that is deployed on the side of the passenger compartment so as to correspond to the rear seats and the plurality of seat rows in front of the rear seats, or one inflator with a large capacity, or 2 Unlike the case of deploying with the gas supplied from one inflator, the inflator required to deploy the curtain airbag is small and requires only one. In addition, unlike the case of deploying a curtain air bag for a large number of seats corresponding to the rear seats, the deployment time does not increase, so there is no need to increase the deployment speed and a large capacity inflator is required. do not do. Each seat row is provided with a plurality of independent curtain airbags that are deployed on the side of the passenger compartment so as to correspond only to passengers seated in the seat row, and each curtain is provided with an inflator provided for each seat row. Unlike the case where gas is supplied to each airbag, the number of inflators can be reduced, and the structure for accommodating them can be simplified. Therefore, the ease of mounting on the vehicle and the protection performance for the occupant are compatible at a higher level.

  In order to achieve the second object, the invention according to claim 5 is the invention according to any one of claims 2 to 4, wherein the curtain airbag includes a front seat, a middle seat, and a rear seat. In a vehicle having three rows of seats, the vehicle is developed in the side of the passenger compartment so as to correspond to the front seat and the middle seat.

  According to invention of Claim 5, in addition to the effect | action of the invention as described in any one of Claims 2-4, there exists the following effect | action. A large-capacity three-row seat curtain air bag deployed on the side of the passenger compartment corresponding to the front seat, middle seat, and rear seat is a gas supplied from one inflator or two inflators with a large capacity. Unlike the case of deploying, the inflator required to deploy the curtain airbag is small and requires only one. In addition, unlike the case of deploying a curtain air bag for a three-row seat with a large volume corresponding to the rear seat, the deployment time does not become long, so there is no need to increase the deployment speed and a large capacity inflator is required. do not do. Each seat row is provided with a plurality of independent curtain airbags that are deployed on the side of the passenger compartment so as to correspond only to passengers seated in the seat row. Unlike the case where gas is supplied to each airbag, the number of inflators can be reduced, and the structure for accommodating them can be simplified. Therefore, the ease of mounting on the vehicle and the protection performance for the occupant are compatible at a higher level.

  The invention according to claim 6 is the invention according to any one of claims 2 to 5, wherein an impact of a magnitude exceeding a predetermined value is applied to the vehicle body part where the rear seat is provided, In addition, there is provided an airbag control means for deploying only the rear seat airbag device when an impact exceeding a predetermined value is not applied to the vehicle body portion provided with a seat in front of the rear seat. It is characterized by.

  According to the invention described in claim 6, in addition to the operation of the invention described in any one of claims 2 to 5, the size exceeding a predetermined value with respect to the vehicle body part provided with the rear seat. Even if the impact is applied, the curtain airbag will not be deployed and only the airbag for the rear seat will not be deployed if there is no impact exceeding a predetermined value on the vehicle body part where the seat on the front side of the rear seat is provided. Expands. Therefore, even when protecting the rear seat occupant with the rear seat airbag deployed, the curtain airbag is not unnecessarily deployed when there is no need to protect the front seat occupant relative to the rear seat.

  According to a seventh aspect of the present invention, in the invention of the sixth aspect, the airbag control means applies an impact exceeding a predetermined value to a vehicle body part provided with a front seat from the rear seat. In addition, when no impact exceeding a predetermined value is applied to the vehicle body part where the rear seat is provided, only the front seat airbag device is deployed.

  According to the invention described in claim 7, in addition to the operation of the invention described in claim 6, an impact having a magnitude exceeding a predetermined value is applied to the vehicle body part provided with the front seat from the rear seat. However, when an impact exceeding a predetermined value is not applied to the vehicle body portion where the rear seat is provided, the rear seat airbag is not deployed and only the curtain airbag is deployed. Therefore, even when the curtain airbag is inflated and deployed to protect the occupant of the seat on the front side of the rear seat, the rear seat airbag is not unnecessarily deployed when protection of the rear seat occupant is unnecessary.

  It is possible to provide a rear seat airbag device that can more reliably protect an occupant seated in a rear seat from an impact applied from the side in addition to an impact applied from behind to the vehicle.

Hereinafter, an embodiment in which the present invention is embodied in an airbag system used in a vehicle having three rows of seats will be described with reference to FIGS.
As shown in FIG. 2, inside the left and right ends of the roof 11 in the vehicle body 10, passengers seated on the front seat 15 and the middle seat 16 over the range from the A pillar 12 to the C pillar 14 through the B pillar 13 are shown. A pair of left and right curtain airbags 17 for protection are accommodated in a folded state. As shown in FIG. 4, each curtain airbag 17 is arranged along the inner panel 51 of the roof side rail 50. The curtain airbag 17 housed inside the right end of the roof 11 is supplied with gas from the right curtain inflator 18R, which is also fixed to the inner panel 51, so that the roof trim is shown in the two-dot chain line. The lower end of 52 is pushed open to be developed in the passenger compartment 53. Further, the curtain airbag 17 housed inside the left end of the roof 11 is supplied with gas from the left curtain inflator 18L (shown in FIG. 9) fixed to the inner panel 51, so that the curtain on the right side of the passenger compartment. The air bag 17 is deployed in the same manner.

  As shown in FIG. 2, the rear end of each curtain airbag 17 is connected to a ring (not shown) guided in the vertical direction along the first guide rails 19 provided inside the left and right C pillars 14, respectively. ing. As shown in FIG. 3, each curtain airbag 17 is deployed so as to correspond to the front door window 20, the B pillar 13, and the rear door window 21 on the left and right sides of the passenger compartment. Accordingly, both curtain airbags 17 are deployed so as to correspond to the occupants seated in the front seat 15 and the middle seat 16 on both the left and right sides. The left and right curtain airbags 17 and the curtain inflators 18R and 18L constitute a front seat airbag device.

  Further, as shown in FIGS. 2 and 6, in the rear peripheral end of the roof 11, the rear seat 23 extends from the right C pillar 14 through the left and right D pillars 22 to the left C pillar 14. A rear head airbag 24 for protecting a seated passenger is accommodated in a folded state. The rear head airbag 24 is disposed along the roof side rail 50 between the C pillar 14 and the D pillar 22, as in the curtain airbag 17, and is illustrated in FIG. 5 between the left and right D pillars 22. Thus, it arrange | positions along the inner side lower end side of the roof inner panel 54. As shown in FIG. Then, the rear head airbag 24 pushes the lower end of the roof trim 52 as shown by a two-dot chain line in FIG. 5 when gas is supplied from the rear inflator 25 which is also fixed to the roof inner panel 54. It opens in the passenger compartment 53 by opening.

  As shown in FIGS. 2 and 6, the left and right front ends of the rear head airbag 24 have a ring (not shown) that is guided substantially vertically along a second guide rail 26 provided inside the C pillar 14. ing. Further, as shown in FIGS. 1 (a) and 1 (b), tethers for connecting the inner base fabric 24a and the outer base fabric 24b are formed at the left and right bent portions of the rear head airbag 24 corresponding to the D pillars 22. 37 is provided. The left and right bent portions of the rear head airbag 24 include a ring 38 that is guided substantially vertically along a third guide rail 27 provided inside the D pillar 22.

  The rear head airbag 24 is guided by the guide rails 26 and 27. As shown in FIGS. 3 and 7, the rear head airbag 24 is guided to the tailgate window 28, the left and right D pillars 22 and the left and right quarter windows 29 on the side of the passenger compartment. Expand to accommodate. That is, the rear head airbag 24 is provided so as to be continuous with the rear inflating portion 24c that extends so as to correspond to the tailgate window 28, and the left and right ends of the rear inflating portion 24c, and corresponds to the entire quarter window 29. And a pair of left and right side inflatable portions 24d that expand into the right side. Accordingly, the rear inflating part 24c is deployed in the rear part of the passenger compartment so as to correspond to an occupant sitting on the rear seat 23. As shown in FIG. 1A, the side inflating part 24d is deployed in the side part of the passenger compartment so as to correspond to the range from the front end position of the seat part 23a of the rear seat 23 to the front. The rear head airbag 24 and the rear inflator 25 constitute a rear seat airbag device.

Next, the electrical configuration of the present embodiment will be described.
As shown in FIG. 8, the lower part corresponding to the left and right A pillars 12, the lower part corresponding to the B pillar 13 on the left and right vehicle body side parts, and the lower part corresponding to the C pillar 14 on the left and right car body side parts were added from the side. Impact sensors 30R, 30L, 31R, 31L, 32R, and 32L for detecting impacts are provided. In the lower part corresponding to the left and right D pillars 22, impact sensors 33 </ b> R and 33 </ b> L that detect impact applied from the side and obliquely rearward are provided. An impact sensor 34 for detecting an impact applied to the rear portion of the vehicle body is provided inside the tailgate.

As shown in FIG. 1 (a), seating sensors 35R and 35L for detecting whether or not an occupant is seated in the rear seat 23 are provided at the left and right seating positions of the seat portion 23a of the rear seat 23. ing.
As shown in FIG. 9, the control device 36 determines the part of the vehicle body 10 to which an impact has been applied based on the detection information input from each of the impact sensors 30R, 30L, 31R, 31L, 32R, 32L, 33R, 33L, and 34. To do. The control device 36 selectively activates the left and right curtain inflators 18R and 18L and the rear inflator 25 based on the determination result.

Next, the operation of the present embodiment configured as described above will be described.
As shown in FIG. 10, when another vehicle 41 collides with the host vehicle 40 having the airbag system of the present embodiment from substantially behind and the impact sensor 34 detects an impact exceeding a predetermined value, The control device 36 inflates and deploys only the rear head airbag 24. Further, as shown in FIG. 11, when the other vehicle 41 collides with the rear part of the host vehicle 40 substantially obliquely from behind and the impact sensor 33R or 33L detects an impact exceeding a predetermined value, the control device 36 inflates and deploys only the rear head airbag 24. Further, as shown in FIG. 12, the other vehicle 41 collides from the side of the vehicle body of the host vehicle 40 almost from the side, and any of the impact sensors 32R, 32L, 33R, 33L exceeds a predetermined value. Is detected, the control device 36 inflates and deploys only the rear head airbag 24. Further, in each case described above, the control device 36 does not inflate and deploy the rear head airbag 24 when it is determined from the detection results of the seating sensors 35R and 35L that no occupant is seated on the rear seat 23.

  Therefore, when the other vehicle 41 collides with the rear portion of the vehicle body of the host vehicle 40, the rear head airbag 24 that is deployed protects the rear seat occupant from collision with the tailgate window 28, the left and right D pillars 22, and the left and right quarter windows 29. Is done. At this time, the left and right side inflatable portions 24d of the rear head airbag 24 are deployed so as to correspond to the entire quarter window 29 beyond the range from the front end position of the seat portion 23a of the rear seat 23 to the front. The crew is effectively protected. When the rear head airbag 24 is deployed downward from the roof 11, the left and right bent portions are guided and restrained by the third guide rail 27, so that the left and right bent portions are stretched to the rear seat 23 side. I will not put it out.

  Further, as shown in FIG. 13, the other vehicle 41 collides almost from the side in the vicinity of the front seat 15 and any of the impact sensors 30R, 30L, 31R, 31L detects an impact exceeding a predetermined value. Sometimes, the control device 36 inflates and deploys only the curtain airbag 17 on the side on which the other vehicle 41 collides. Therefore, the occupants of the front seat 15 and the middle seat 16 are protected by the curtain airbag 17 on the side that has collided with the other vehicle 41. At this time, the control device 36 determines that no occupant is seated in the front seat 15 and the middle seat 16 from the detection results of the seating sensors 39FR, 39FL, 39MR, and 39ML provided in the front seat 15 and the middle seat 16. When this is done, the curtain airbag 17 is not inflated and deployed.

  Further, as shown in FIG. 14, the other vehicle 41 collides almost from the side near the middle seat 16 and the impact sensors 31R and 32R or the impact sensors 31L and 32L detect an impact exceeding a predetermined value. When this happens, the curtain airbag 17 and the rear head airbag 24 on the side where the other vehicle 41 collides are inflated and deployed. For this reason, the occupants of the front seat 15, the middle seat 16, and the rear seat 23 are protected by the curtain airbag 17 and the rear head airbag 24 on the side collided with the other vehicle 41. At this time, the control device 36 determines that no occupant is seated in the front seat 15 and the middle seat 16 from the detection results of the seating sensors 39FR, 39FL, 39MR, and 39ML provided in the front seat 15 and the middle seat 16. When this is done, the curtain airbag 17 is not inflated and deployed. The control device 36 does not inflate and deploy the rear head airbag 24 when it is determined from the detection results of the seating sensors 35R and 35L provided on the rear seat 23 that no occupant is seated on the rear seat 23.

Next, effects of the present embodiment described in detail above will be listed.
(1) When an impact is applied from the rear to the rear part of the vehicle body provided with the rear seat 23, the rear inflating part 24c of the rear head airbag 24 deployed from the roof 11 to the rear part of the passenger compartment is seated on the rear seat 23. Protect the occupants. Further, when an impact is applied from the side to the rear part of the vehicle body, the side part of the rear head airbag 24 that is deployed on the side of the passenger compartment so as to correspond to the range from the seat front end position of the rear seat 23 to the front side. The portion 24d reliably protects the rear seat occupant. Therefore, the passenger sitting on the rear seat 23 can be more reliably protected from the impact applied from the side in addition to the impact applied to the rear portion of the vehicle body from the rear.

  (2) The rear head airbag 24 described in (1) above is deployed with gas supplied from one rear inflator 25. Further, the pair of left and right curtain airbags 17 accommodated in the roof 11 on the left and right sides of the front seat 15 and the middle seat 16 are supplied by the gas supplied from the curtain inflators 18R and 18L, respectively. And it expand | deploys in a vehicle compartment right-and-left side part so that it may respond | correspond to each passenger | crew seated in the middle seat 16. FIG.

  For this reason, instead of the curtain airbag 17 of the present embodiment, one large-capacity curtain airbag for a three-row seat that is deployed so as to correspond to the passengers of the front seat 15, the middle seat 16, and the rear seat 23 is provided. Or, unlike a case where the gas is supplied from two inflators, only one small inflator is used. In addition, unlike the case of deploying a large curtain airbag for a three-row seat, the deployment time does not become long, so there is no need to increase the deployment speed and a large capacity inflator is not necessary. Also, unlike the case where three curtain airbags provided to correspond to each row are deployed with gas supplied from one inflator provided for each curtain airbag, the number of inflators can be reduced. The structure for accommodating them is simple. Therefore, both the ease of mounting on the vehicle and the protection performance for the passenger can be achieved at a higher level.

  (3) Even when an impact exceeding a predetermined value is applied to the rear part of the vehicle body provided with the rear seat 23, the predetermined value from the side with respect to the central part of the vehicle body provided with the front seat 15 and the middle seat 16 When the impact of more than is not applied, only the rear head airbag 24 is inflated and deployed, and the left and right curtain airbags 17 are not inflated and deployed. Therefore, even when the rear head airbag 24 is deployed to protect the passengers in the rear seat 23, the left and right curtain airbags 17 are unnecessarily deployed when there is no need to protect the passengers in the front seat 15 and the middle seat 16. There is nothing.

  (4) Even when an impact greater than a predetermined value is applied from the side to the center of the vehicle body where the front seat 15 and the middle seat 16 are provided, an impact greater than a predetermined value is applied to the rear portion of the vehicle body. When not, only the curtain airbag 17 on the impacted side is inflated and deployed, and the rear head airbag 24 is not inflated and deployed. Therefore, even when the curtain airbag 17 is inflated and deployed to protect the occupants of the front seat 15 and the middle seat 16, the rear head airbag 24 is unnecessarily deployed when it is not necessary to protect the occupants of the rear seat 23. There is no.

Next, embodiments other than the one embodiment will be listed.
The left and right side inflatable portions 24 d of the rear head airbag 24 are configured to be expanded below the quarter window 29.

  The air bag system of the present invention is embodied in a vehicle having two rows of seats as a configuration including a curtain airbag that protects the front seat occupant and a rear head airbag that protects the rear seat occupant. thing.

The air bag system according to the present invention is implemented in a vehicle that does not maintain a B-pillar, such as a vehicle in which the front door and the rear door are double doors.
-The rear seat airbag device of the present invention is implemented in a vehicle having only one row of seats such as a sports car.

  The airbag system according to the present invention includes a rear seat airbag device and a front seat airbag device having a curtain airbag that is deployed only on the left side or the right side of the vehicle.

(A) is a top view which shows the rear head airbag of this embodiment, (b) is a principal part plane sectional view of (a). The side view which shows the accommodation state of a curtain airbag. The side view which shows an unfolded state similarly. The longitudinal cross-sectional view of a roof side rail. The longitudinal cross-sectional view of a roof rear end. The side view which shows the accommodation state of a rear head airbag. The side view which shows an unfolded state similarly. The perspective view of the vehicle which shows an impact sensor and a control apparatus. The block diagram which shows an electrical structure. The schematic diagram which shows a rear collision state. The schematic diagram which shows an oblique back collision state. The schematic diagram which shows the side collision state with respect to a vehicle body rear part. The schematic diagram which shows the side collision state with respect to the vehicle body center part front side. The schematic diagram which shows the side collision state with respect to the vehicle body center part rear side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle body, 11 ... Roof, 15 ... Front seat, 16 ... Middle seat, 17 ... Curtain airbag which comprises the airbag apparatus for front seats, 18R ... Inflator for right curtains which comprise the airbag apparatus for front seats, 18L ... the left curtain inflator, 23 ... rear seat, 23a ... seat part, 24 ... rear head airbag as a rear seat airbag constituting the rear seat airbag device, 24c ... rear inflatable part, 24d ... side part Inflatable portion 25 ... Rear inflator constituting rear seat airbag device, 30R, 30L, 31R, 31L, 32R, 32L, 33R, 33L, 34 ... Shock sensor as airbag control means, 36 ... Airbag control Control device as means, 53.

Claims (7)

A rear seat airbag device including a rear seat airbag that is deployed in a passenger compartment from a state accommodated in a vehicle roof,
The rear seat airbag is provided in a rear inflatable portion that is deployed at the rear of the passenger compartment so as to correspond to an occupant seated in the rear seat, and is provided so as to be continuous with the left and right ends of the rear inflatable portion. A rear seat airbag device comprising: a side inflatable portion that is deployed in a vehicle compartment side portion so as to correspond to a front range including a seat front end position. A rear seat airbag device according to claim 1;
A front-seat airbag having a curtain airbag that is accommodated in a roof at a side of a seat row in front of the rear seat and that is deployed at a side of the passenger compartment so as to correspond to an occupant seated on the seat in the same row. And an air bag system.   The airbag system according to claim 2, wherein the curtain airbag is composed of a pair of left and right deploying at left and right sides of the passenger compartment. A rear inflator for supplying gas to the rear seat airbag;
The airbag system according to claim 2 or 3, further comprising a curtain inflator provided for each curtain airbag and supplying gas to the corresponding curtain airbag.   3. The curtain airbag is deployed in a vehicle compartment side portion so as to correspond to a front seat and a middle seat in a vehicle having three rows of seats, a front seat, a middle seat, and a rear seat. The airbag system according to any one of claims 4 to 5.   An impact greater than a predetermined value is applied to the vehicle body part provided with the rear seat, and an impact greater than a predetermined value is applied to the vehicle body part provided with a seat on the front side of the rear seat. The airbag system according to any one of claims 2 to 5, further comprising an airbag control means for deploying only the rear seat airbag device when not added.   The airbag control means applies an impact exceeding a predetermined value to a vehicle body part provided with a seat in front of the rear seat, and has a predetermined value for the vehicle body part provided with the rear seat. 7. The airbag system according to claim 6, wherein when the impact exceeding the above is not applied, only the front seat airbag device is deployed.

Images