JP7409286B2 - Vehicle side impact airbag system - Google Patents

Description

The present invention relates to a side impact airbag system for a vehicle.

Patent Document 1 listed below discloses a vehicle equipped with a curtain airbag. This curtain airbag is supported by the roof side rail of the vehicle. When a vehicle is involved in a side collision, gas generated from the inflator is supplied to the curtain airbag. As a result, the curtain airbag pushes down the side portion of the roof headlining and is inflated and deployed toward the lower side of the vehicle along the side window. As a result, the heads of the occupants seated in the front and rear seats are restrained and protected by the curtain airbags.

Japanese Patent Application Publication No. 2007-050847

If, for example, a longitudinally intermediate portion of the front side door collides with the pole from the side, the front side door is deformed so as to bend toward the interior of the vehicle. Accordingly, the curtain airbag is also pushed by the bending portion of the front side door and bends inward in the vehicle width direction. As a result, the rear part of the curtain airbag, particularly the head protection area (rear chamber) of the rear seat occupant, is drawn toward the front of the vehicle. Generally, when the rear chamber is viewed in plan view, the thickness of the rear end portion of the rear chamber is thinner than the thickness of the main body portion of the rear chamber. Therefore, when the rear chamber is pulled toward the front of the vehicle due to the above phenomenon, the rear end of the rear chamber will be located outside the head of the rear seat occupant in the vehicle width direction, and the head will be located at the rear end of the rear chamber. Contact time until contact is delayed. Therefore, there is a risk that restraint of the head of the rear seat occupant by the curtain airbag may be delayed.

In consideration of the above facts, the present invention provides a vehicle capable of maintaining good head restraint performance for rear seat occupants in the event of a side collision with a pole at a portion located to the side of the front seat on the side of the vehicle. The purpose is to obtain a side-impact airbag system for use.

The side-impact airbag system for a vehicle according to claim 1 is characterized in that, when a vehicle is involved in a side collision, gas supplied inside the vehicle causes the lumbar region, chest, and head of an occupant seated in a front seat to be damaged from the outside in the width direction of the vehicle. A front-seat airbag that inflates and deploys to face each other is provided separately and independently from the front-seat airbag, and in the event of a side collision of the vehicle, gas supplied to the interior allows the occupant to sit in the rear seat. The airbag is inflated and deployed so as to face the head of the front seat airbag from the outside in the vehicle width direction, and when the deployment is complete, the front end is located away from the rear end of the front seat airbag toward the rear of the vehicle. and a rear seat airbag, the front seat airbag is at least partially stored in the outer side of the seat back of the front seat, and when gas is supplied inside, the front seat airbag is The rear seat airbag is a side airbag that is inflated and deployed so as to face the lower back, chest, and head of an occupant seated in the vehicle from the outside in the width direction of the vehicle. When gas is supplied to the inside of the curtain airbag, the curtain airbag is inflated and deployed toward the lower side of the vehicle so as to face the head of the occupant seated in the rear seat from the outside in the width direction of the vehicle, rather than the waist. The side airbag has a lower chamber that is inflated and deployed to face the occupant's waist and chest from the outside in the vehicle width direction when gas is supplied therein, and the side airbag communicates with the lower chamber; When looking in the longitudinal direction of the vehicle in a fully deployed state with gas supplied inside, the rear surface of the webbing on the shoulder side that restrains the occupant's upper body and the occupant's head are located on the upper side of the vehicle at the outer shoulder of the occupant. an upper chamber that is inflated and deployed to restrain the head of the occupant, and the webbing is attached to the occupant before gas is supplied to the interior of the front seat. When viewed from the front, an end portion of the upper chamber on the inner side in the vehicle width direction is located on the inner side in the vehicle width direction than a portion of the shoulder-side webbing that is located at the same height as the upper chamber .

In the side-impact airbag system for a vehicle according to the first aspect, a front-seat airbag is inflated and deployed by gas supplied inside the vehicle at the time of a side collision of the vehicle. As a result, the front seat airbag faces the lumbar region, chest, and head of the occupant seated in the front seat from the outside in the vehicle width direction, so the lumbar region, chest, and head of the occupant are restrained by the front seat airbag. be done.

Further, when the vehicle is involved in a side collision, a rear seat airbag, which is provided separately and independently from the front seat airbag, is inflated and deployed by gas supplied inside the vehicle. As a result, the rear seat airbag faces the head of the occupant seated in the rear seat from the outside in the vehicle width direction.

By the way, if a part of the side of the vehicle located to the side of the front seat (for example, the front-rear intermediate part of the front side door, hereinafter sometimes referred to as the "collision part") collides with the pole from the side, the collision part It is deformed so that it bends toward the inside of the vehicle. As a result, the rear end of the front seat airbag may be drawn toward the front of the vehicle.

However, in the present invention, as described above, the rear seat airbag is provided separately and independently from the front seat airbag, so the rear seat airbag is not affected by the behavior of the front seat airbag. I don't accept it. Further, in the present invention, the front end of the rear seat airbag in a fully deployed state is located at a position away from the rear end of the front seat airbag in a fully deployed state toward the rear of the vehicle, and The front part of the rear seat airbag does not overlap the rear part of the rear seat airbag when viewed from the vehicle width direction. For this reason, even if the collision site bends, the rear part of the rear seat airbag will not be drawn forward by the collision site.

Generally, the protection area of a rear seat airbag for a side collision has a thinner inflated thickness at the front and rear ends, and a thicker inflated thickness at the other main parts. Therefore, if the rear part of the rear seat airbag is pulled forward by the collision site, the rear end of the rear seat airbag will protect the occupant's head, and the rear end of the rear seat airbag will protect the passenger's head. The contact time with the rear end of the airbag is delayed. However, in the present invention, even if the rear end portion of the front seat airbag is pulled toward the front side of the vehicle, the rear seat airbag is not affected by the rear end portion of the front seat airbag. Therefore, there is a high possibility that the head of the rear seat occupant will be restrained by the portion located forward of the rear end of the rear seat airbag. Therefore, there is little risk that restraint of the head of the rear seat occupant by the rear seat airbag will be delayed.

Furthermore, in the invention as set forth in claim 1 , the front seat airbag is a side airbag attached to the seat, while the rear seat airbag is a curtain airbag. When the curtain airbag is inflated and deployed, the curtain airbag faces the head of the occupant seated in the rear seat from the outside in the vehicle width direction. That is, the curtain airbag may have a size that does not face the waist and chest of the occupant. Therefore, the capacity of the curtain airbag can be reduced, and the output of the inflator that supplies gas to the curtain airbag can be reduced. Therefore, the manufacturing cost of the vehicle side impact airbag system can be reduced.

In the vehicle side impact airbag system according to the invention set forth in claim 2 , in the invention set forth in claim 1 , when gas is supplied inside the side airbag, the side airbag is configured to cause damage to the waist and chest of the occupant. Lower chambers that are inflated and deployed to face each other from the outside in the vehicle width direction, and the outer shoulder of the occupant when viewed in the vehicle longitudinal direction in a fully deployed state where the lower chambers are in communication with the lower chambers and gas is supplied inside. an upper chamber that is inflated and deployed between the rear surface of shoulder-side webbing that restrains the upper body of the occupant on the upper side of the vehicle and the side surface of the occupant's head to restrain the occupant's head; The tear seam provided on the side of the surface of the seat back of the front seat includes a portion adjacent to the front and side surfaces of the surface of the seat back, a portion adjacent to the side surface and the top surface of the surface, and a portion adjacent to the top surface of the surface. It is provided at the upper end of the adjacent portion of the side surface and the rear surface, and near the upper end of the rear surface.

In the invention according to claim 2 , when the expanded state of the upper chamber is viewed in the longitudinal direction of the vehicle, the upper chamber has a webbing on the shoulder side that restrains the upper body of the occupant at the upper side of the vehicle at the outer shoulder portion of the occupant. It is inflated and deployed between the rear surface of the vehicle and the side of the occupant's head. Therefore, when the occupant's head is displaced outward in the vehicle width direction during a side collision, the upper chamber is sandwiched between the outer side surface of the head and the rear surface of the shoulder-side webbing. Thereby, the upper chamber restrains the head of the occupant by taking a reaction force from the rear surface of the webbing on the shoulder side (that is, using the rear surface as a support surface). As a result, the upper chamber faces the side surface of the occupant's head while receiving a reaction force from the rear surface of the webbing on the shoulder side in a direction toward the head, thereby exhibiting high initial restraint performance. Furthermore, since the rear surface of the webbing on the shoulder side presses the upper chamber, when an oblique collision occurs in the vehicle, restraint of the head by the upper chamber is hardly delayed.

As explained above, the vehicle side impact airbag system according to the present invention provides head restraints for rear seat occupants in the event of a side collision with a pole at a portion of the side of the vehicle located to the side of the front seat. It has the excellent effect of being able to maintain good performance.

FIG. 1 is a schematic side view of a vehicle equipped with a side impact airbag system for a vehicle according to a first embodiment. FIG. 2 is a schematic plan view of the vehicle shown in FIG. 1 with the roof omitted. FIG. 2 is a schematic cross-sectional view taken at a front seat position of the vehicle shown in FIG. 1. FIG. FIG. 4 is a schematic enlarged front view of the outer upper portions of the left and right front seats shown in FIG. 3; FIG. 4 is a schematic enlarged perspective view of the left and right front seats shown in FIG. 3 viewed from the front. FIG. 4 is a schematic enlarged perspective view of the left and right front seats shown in FIG. 3 viewed from behind. FIG. 3 is a plan view corresponding to FIG. 2 showing a situation when a pole side collision occurs on the left side of the vehicle shown in FIG. 2; FIG. 2 is a schematic side view of a vehicle equipped with a side impact airbag system for a vehicle according to a second embodiment. FIG. 8 is a schematic plan view showing the vehicle shown in FIG. 7 with the roof omitted. 8 is a schematic cross-sectional view taken at a rear seat position of the vehicle shown in FIG. 7. FIG. 10 is a schematic enlarged front view of both left and right sides of the seat back of the rear seat shown in FIG. 9. FIG. 10 is a schematic enlarged perspective view of the left and right sides of the seat back of the rear seat shown in FIG. 9, viewed from the front. FIG. 10 is a schematic enlarged perspective view of the left and right sides of the seat back of the rear seat shown in FIG. 9, viewed from the rear. FIG. FIG. 9 is a plan view corresponding to FIG. 8 showing a situation when a pole side collision occurs on the left side of the vehicle shown in FIG. 8; FIG. 7 is a plan view corresponding to FIG. 6 illustrating a situation when a pole side collision occurs in a vehicle of a comparative example.

<First embodiment>
Hereinafter, a first embodiment of a vehicle side-impact airbag system 10 (hereinafter abbreviated as airbag system 10) according to the present invention will be described with reference to FIGS. 1 to 6. Note that the arrow UP shown in each figure indicates the upper side in the vehicle vertical direction, the arrow FR indicates the front side in the vehicle longitudinal direction, and the arrow LH indicates the left side in the vehicle left-right direction (vehicle width direction). In the following description, the up-down direction, the front-rear direction, and the left-right direction mean the vehicle up-down direction, the vehicle front-rear direction, and the vehicle left-right direction, respectively.

Openings are formed on both left and right sides of a vehicle body 14 of a vehicle 12 in which the airbag system 10 is mounted. A B-pillar 20 is provided at the center of the left and right openings in the front-rear direction to divide these openings into a front opening 16 on the front side and a rear opening 18 on the rear side. Roof side rails 22 extending in the front-rear direction are provided at both left and right ends of the roof that constitutes the upper end of the vehicle body 14 (only the left roof side rail 22 is shown in FIG. 1). The upper end portions of the left and right B-pillars 20 are connected to the center portions of the left and right roof side rails 22 in the front-rear direction, respectively.

Front side doors 24 for opening and closing the front openings 16 are provided at the left and right front openings 16 of the vehicle body 14. The interior side surfaces of the lower halves of the left and right front side doors 24 are constituted by door trims 26 made of resin. Rear side doors 28 for opening and closing the rear openings 18 are provided at the left and right rear openings 18 of the vehicle body 14. The interior surfaces of the lower halves of the left and right rear side doors 28 are constituted by door trims 30 made of resin. Furthermore, a pair of left and right rear wheel houses 32, which are part of the vehicle body frame, are provided at the rear of the vehicle body 14.

As shown in FIGS. 1 and 2, a right front seat 34 and a left front seat 36 are provided in a vehicle interior 14A, which is an internal space of the vehicle body 14. The front seats 34 and 36 are seats in the front row. A pair of left and right slide rail devices (not shown) that slidably support the front seats 34 and 36 in the front and rear directions are provided on the floor of the vehicle compartment 14A. The slide rail device is provided with a locking mechanism for fixing the front and rear seats 34 and 36 at predetermined positions.

A steering wheel 42 is provided at a portion located to the left of the center in the left-right direction of a dashboard 40 provided at the front end of the vehicle interior 14A. That is, in this embodiment, the left front seat 36 is a driver's seat, and the right front seat 34 is a passenger seat. The front seats 34 and 36 include seat cushions 34A, 36A (not shown in FIG. 6), seat backs 34B, 36B, and headrests 34C, 36C. Side support portions (side portions) 34B1, 36B1 are provided at the inner and outer ends of the seatbacks 34B, 36B in the vehicle width direction. As shown in FIG. 4, inside each side support part 34B1, 36B1, metal side frames 34B2, 36B2 are provided that extend in the vertical direction of each side support part 34B1, 36B1. The seat backs 34B, 36B are rotatable about a rotation axis in the vehicle width direction with respect to the seat cushions 34A, 36A. A reclining mechanism (not shown) that can adjust the inclination angle (rotation angle) of the seat backs 34B, 36B with respect to the seat cushions 34A, 36A is provided between the seat backs 34B, 36B and the seat cushions 34A, 36A. .

As shown in FIGS. 5A and 5B, the surfaces of the seat backs 34B and 36B include front surfaces 34B3 and 36B3, a pair of left and right side surfaces 34B4 and 36B4, top surfaces 34B5 and 36B5, and rear surfaces 34B6 and 36B6. The surfaces of the seat backs 34B and 36B are composed of a plurality of skin materials. Furthermore, the peripheral edges of adjacent skin materials are sewn together with thread. That is, a sewn portion is provided at the peripheral edge of each skin material.

Further, a part of the sewn portions of the seat backs 34B and 36B are constituted by tear seams 34D and 36D shown in bold lines in FIGS. 5A and 5B. A tear seam 34D is provided on the right side of the seat back 34B, and a tear seam 36D is provided on the left side of the seat back 36B. The left and right tear seams 34D, 36D are adjacent to the front surfaces 34B3, 36B3 and the side surfaces 34B4, 36B4, adjacent to the side surfaces 34B4, 36B4 and the top surfaces 34B5, 36B5, and adjacent to the side surfaces 34B4, 36B4 and the rear surfaces 34B6, 36B6. It is provided at the upper end and near the upper ends of the rear surfaces 34B6 and 36B6.

In FIGS. 1 to 3, a dummy P1 for crash testing is seated in the front seats 34, 36. Dummy P1 is AM50 (50th percentile of American adult males) of the International Side Impact Dummy (WorldSID). Each dummy P1 is seated in the front seats 34 and 36 in a seating manner specified in the side impact test method. Further, the front and back positions of the seat cushions 34A, 36A with respect to the vehicle 12 and the inclination angles of the seat backs 34B, 36B with respect to the seat cushions 34A, 36A are adjusted to reference setting positions corresponding to the seating method described above. A webbing 46 of a three-point seat belt device 44, which will be described later, is attached to the dummy P1. Hereinafter, the dummy P1 may be referred to as the passenger P1. The seat cushions 34A and 36A support the waist P1w and thigh P1t (not shown in FIGS. 2 and 6) of the occupant P1. The seat backs 34B and 36B can support the back (back) of the chest P1b of the occupant P1. The headrests 34C and 36C can support the head P1h of the occupant P1.

As shown in FIGS. 2 and 3, the vehicle 12 is provided with a pair of left and right seat belt devices 44. The seat belt device 44 includes a webbing 46, a take-up device 48, a shoulder anchor 50, a lap anchor 52, a tongue 54, and a buckle 56.

One end of the flexible long band-shaped webbing 46 (belt) is provided inside a winding device 48 (see FIG. 3) provided at the lower end of both left and right sides of the vehicle body 14. . As is well known, the take-up device 48 can take up the webbing 46 into the take-up device 48 and can pull the webbing 46 out of the take-up device 48 . Further, the take-up device 48 can lock the webbing 46 from being pulled out from the take-up device 48 when the webbing 46 is suddenly pulled out from the take-up device 48 .

Shoulder anchors 50 are fixed to the left and right B pillars 20. An insertion hole is formed in the shoulder anchor 50. The webbing 46 is inserted through the insertion hole of the shoulder anchor 50, and the webbing 46 is folded back at the insertion hole of the shoulder anchor 50.

A lap anchor 52 is fixed to the outer end of the seat cushions 34A, 36A of the front seats 34, 36 in the vehicle width direction. The other end of the webbing 46 is supported by a lap anchor 52.

A tongue 54 is provided in a portion of the webbing 46 between the shoulder anchor 50 and the lap anchor 52. An insertion hole is formed in the tongue 54, and the webbing 46 is movably inserted through the insertion hole.

A buckle 56 is provided at the inner end of the seat cushions 34A, 36A of the front seats 34, 36 in the vehicle width direction. The tongue 54 can be attached to and detached from the buckle 56. As shown in FIG. 3, when the tongue 54 is attached to the buckle 56, the shoulder anchor 50 of the webbing 46 is attached to the upper body (chest P1b and shoulder P1s) of each passenger P1 seated in the front seats 34, 36. The shoulder webbing 46A, which is the part between the tongue 54, is in close contact with the shoulder webbing 46A.

The vehicle interior 14A is provided with a rear seat 58 located on the rear side of the front seats 34 and 36. The rear seat 58 includes a single seat cushion 58A (not shown in FIG. 6), a single seat back 58B, and three headrests 58C. The dimensions of the seat cushion 58A and the seat back 58B in the vehicle width direction are approximately the same as the dimensions of the vehicle interior 14A in the vehicle width direction.

As shown in FIG. 2, a dummy P2 is seated on the left and right sides of the rear seat 58. Dummy P2 is AM50, an internationally standardized side impact dummy. The dummy P2 is seated in the rear seat 58 in a seating manner stipulated by the side impact test method. A webbing 62 of a three-point seat belt device 60, which will be described later, is attached to the dummy P2. Hereinafter, the dummy P2 may be referred to as the passenger P2. The seat cushion 58A supports the waist P2w and thigh P2t (not shown in FIGS. 2 and 6) of the occupant P2. The seat back 58B can support the back surface (back) of the chest P2b of the occupant P2. The headrest 58C can support the head P2h of the occupant P2.

As shown in FIG. 2, two seat belt devices 60 are provided in the rear seat 58. The seat belt device 60 includes a webbing 62, a take-up device 64, a shoulder anchor, a lap anchor 66, a tongue 68, and a buckle 70.

One end of the flexible long band-shaped webbing 62 (belt) is provided inside a winding device 64 provided on the rear side of the rear seat 58. As is well known, the take-up device 64 can take up the webbing 62 into the take-up device 64 and can pull the webbing 62 out of the take-up device 64 . Further, the take-up device 64 can lock the webbing 62 from being pulled out from the take-up device 64 when the webbing 62 is suddenly pulled out from the take-up device 64 .

The vehicle 12 is provided with a shoulder anchor (not shown) provided on the rear side of the rear seat 58 and above the winding device 64. An insertion hole is formed in the shoulder anchor. A webbing 62 is inserted through the insertion hole of the shoulder anchor, and the webbing 62 is folded back at the insertion hole of the shoulder anchor.

A lap anchor 66 is fixed to the vehicle body 14. The other end of the webbing 62 is supported by a lap anchor 66.

A tongue 68 is provided on the webbing 62. An insertion hole is formed in the tongue 68, and the webbing 62 is movably inserted through the insertion hole.

A buckle 70 is provided on the seat cushion 58A. The tongue 68 is attachable to and detachable from the buckle 70. When the tongue 68 is attached to the buckle 70, the shoulder webbing 62A, which is the portion between the shoulder anchor of the webbing 62 and the tongue 68, comes into close contact with the chest P2b and shoulder P2s of each occupant P2 seated in the rear seat 58. . At this time, the shoulder webbing 62A of the left and right seat belt devices 60 is inclined in the vertical direction so as to extend inward in the vehicle width direction as it goes downward in the vertical direction when viewed from the front.

Next, the detailed structure of the airbag system 10 will be explained. The airbag system 10 includes a side airbag (front seat airbag) 72, a first inflator 74, a curtain airbag (rear seat airbag) 78, a second inflator 80, an ECU (electronic control unit) 82, and a side impact airbag. It has a sensor 84 and an oblique collision sensor 86.

As shown in FIG. 4, a side airbag 72 and a first inflator 74 are provided inside the side support parts 34B1 and 36B1 on the outside in the vehicle width direction of the seatbacks 34B and 36B of the front seats 34 and 36.

As shown in FIGS. 1, 3, 4, 5A, and 5B, the side airbag 72 has a lower chamber 72A and an upper chamber 72C that communicate with each other. During normal times when the vehicle 12 is not in a collision, the side airbag 72 is stored inside the seatbacks 34B and 36B in a folded state. A portion of the upper chamber 72C and the lower chamber 72A are housed inside the side support parts 34B1 and 36B1. At this time, when viewed from the front, the lower chamber 72A is approximately parallel to the up-down direction, and the upper chamber 72C is approximately parallel to the left-right direction.

As shown in FIGS. 3 and 4, when the tongues 54 of the left and right seat belt devices 44 are attached to the buckles 56, the left and right shoulder webbings 46A extend toward the vehicle width as they move downward in the vertical direction when viewed from the front. It is inclined with respect to the vertical direction so as to extend inward. Further, when the tongue 54 is attached to the buckle 56, when viewed from the front, the inner end of the upper chamber 72C of the side airbag 72 in the vehicle width direction is lower than the portion located at the same height as the upper chamber 72C of the shoulder webbing 46A. Located on the inside in the vehicle width direction.

The substantially cylindrical first inflator 74 is a so-called cylinder type inflator. As shown in FIG. 4, the first inflator 74 is housed inside the side airbag 72 so that its axial direction is along the vertical direction of the seatbacks 34B and 36B. Further, the first inflator 74 is formed with a plurality of gas ejection ports (not shown) along the circumferential direction of the first inflator 74 . Further, inside the side airbag 72, a diffuser 76, which is a cylindrical flexible member with open ends, is provided. The first inflator 74 is provided inside the diffuser 76. Furthermore, as shown in FIG. 4, a plurality of stud bolts 74A protruding from the outer circumference of the first inflator 74 penetrate the diffuser 76, the side airbag 72, and the side frames 34B2, 36B2, and each stud A nut 38 is screwed onto the tip of the bolt 74A. Thereby, the first inflator 74 is fixed to the side frames 34B2 and 36B2 together with the side airbag 72 and the diffuser 76.

As shown in FIG. 1, a curtain airbag 78 and a second inflator 80 are provided on the vehicle-inward side surfaces of the left and right roof side rails 22.

The curtain airbag 78 is an airbag provided separately and independently from the side airbag 72. In normal times when the vehicle 12 is not in a collision, the curtain airbag 78 is folded up and down, and a portion (the upper end) is supported by the side surface of the roof side rail 22 on the inside of the vehicle. For example, the curtain airbag 78 is folded into a roll or folded into a bellows.

The substantially cylindrical second inflator 80 is a so-called cylinder type inflator. The second inflator 80 is supported on the vehicle-inward side surface of the roof side rail 22 so that its axial direction is along the front-rear direction. Further, the second inflator 80 is formed with a gas jet port (not shown). This gas injection port and the interior space of the curtain airbag 78 are connected by a tube (not shown).

As shown in FIG. 2, the vehicle 12 is provided with an ECU 82. The first inflator 74 and the second inflator 80 are electrically connected to the ECU 82 . The ECU 82 is an electronic control circuit having a microcomputer including a CPU, ROM, RAM, interface, etc. as a main component. The CPU implements various functions described below by executing instructions stored in a memory (ROM).

Furthermore, as shown in FIG. 2, the vehicle 12 is provided with a side impact sensor 84 and an oblique impact sensor 86. The side collision sensor 84 is configured to output a side collision signal to the ECU 82 when a side collision of the vehicle 12 is detected or predicted. The oblique collision sensor 86 is configured to output an oblique collision signal to the ECU 82 when an oblique collision of the vehicle 12 is detected or predicted.

(action and effect)
Next, the functions and effects of the first embodiment will be explained. In the following description, the occupant P1 will be referred to as the front seat occupant P1, the occupant P2 will be referred to as the rear seat occupant P2, the side airbag 72 will be referred to as the front seat side airbag 72, and the curtain airbag 78 will be referred to as the rear seat curtain airbag 78. It is sometimes called.

For example, as shown in FIG. 6, it is assumed that the longitudinally intermediate portion of the left front side door 24 of the moving vehicle 12 side-collides with a pole 88, which is a fixed object. In this case, the portion of the front side door 24 that collides with the pole 88 (hereinafter referred to as the collision portion 12C) is deformed so as to be bent toward the interior of the vehicle. Further, when a side collision occurs with the vehicle 12, the side collision sensor 84 outputs a side collision signal, or the oblique collision sensor 86 outputs an oblique collision signal. Alternatively, the side collision sensor 84 outputs a side collision signal and the oblique collision sensor 86 outputs an oblique collision signal. When at least one of the side collision signal and the oblique collision signal is output in this manner, the ECU 82 transmits an activation signal to the first inflator 74 and the second inflator 80 on the left side.

As a result, as shown by the imaginary lines in FIGS. 1, 2, and 6, gas is injected from the gas outlet of the first inflator 74 on the left side, and the injected gas is transferred to the inside of the left side front seat side airbag 72. flows into. As a result, the inflated and deployed left front seat side airbag 72 ruptures the tear seam 36D of the seat back 36B of the front seat 36 and deforms the skin material constituting the left side of the seat back 36B (Figs. 5A and 5). 5B), the side support portion 36B1 is inflated and deployed toward the front side, the lower side, and the upper side. As a result, the lower chamber 72A expands and deploys on the left side of the front seat occupant P1. That is, the lower chamber 72A of the left front seat side airbag 72 faces the waist P1w and chest P1b of the front seat occupant P1 from the outside in the vehicle width direction. As shown in FIG. 1, the longitudinal dimension of the upper part 72B of the lower chamber 72A when the front seat side airbag 72 is inflated and deployed is smaller than the longitudinal dimension of the portion other than the upper chamber 72B of the lower chamber 72A and the longitudinal dimension of the upper chamber 72C.

Further, as shown in FIG. 3, when the expanded state of the upper chamber 72C is viewed in the front-rear direction, the upper chamber 72C is located above the front seat occupant P1 on the upper side of the outer shoulder P1s of the front seat occupant P1. The shoulder webbing 46A, which restrains the body, is inflated and deployed between the rear surface and the side surface of the head P1h. Therefore, when the head P1h of the front seat occupant P1 is displaced outward in the vehicle width direction during a side collision, the upper chamber 72C is sandwiched between the outer side surface of the head P1h and the rear surface of the shoulder webbing 46A. Thereby, the upper chamber 72C takes a reaction force from the rear surface of the shoulder webbing 46A (that is, uses the rear surface of the shoulder webbing 46A as a support surface) to restrain the head P1h of the front seat occupant P1. As a result, the upper chamber 72C faces the head P1h while receiving a reaction force in the direction of approaching the head P1h from the rear surface of the shoulder webbing 46A. The left front seat side airbag 72 inflated and deployed in this manner restrains the waist P1w, chest P1b, and head P1h of the front seat occupant P1, who has moved relative to the left with respect to the vehicle 12 due to inertia caused by the collision.

In this way, the upper chamber 72C faces the head P1h while receiving a reaction force from the rear surface of the shoulder webbing 46A, and therefore exhibits high initial restraint performance. Furthermore, since the rear surface of the shoulder webbing 46A presses the upper chamber 72C, when an oblique collision occurs in the vehicle 12, the restraint of the head P1h by the upper chamber 72C is hardly delayed.

Furthermore, as shown by the phantom lines in FIGS. 1 and 2, gas is injected from the gas outlet of the second inflator 80 on the left side, and the injected gas flows into the inside of the rear seat curtain airbag 78 on the left side. As a result, the left rear seat curtain airbag 78 deforms the left side edge of the roof headlining downward, and the left side rear seat curtain airbag 78 deforms the left side edge of the roof headlining downward, and the left side rear seat curtain airbag 78 deforms the left side edge of the roof headlining downward, and the left side rear seat curtain airbag 78 deforms the left side edge of the roof headlining. It expands and deploys toward the lower side of the side rail 22. That is, the rear seat curtain airbag 78 inflates and deploys between the head P2h of the left rear seat occupant P2 seated in the rear seat 58 and the side window of the left rear side door 28. As a result, as shown in FIGS. 1, 2, and 6, the left rear seat curtain airbag 78 faces the head P2h of the left rear seat occupant P2 from the outside in the vehicle width direction.

By the way, FIG. 13 shows a case where the front-rear intermediate portion of the left front side door 124 of the vehicle 112 according to the comparative example of the present invention collides with a pole 188, which is a fixed object, from the side. One curtain airbag 170 and one inflator (not shown) are provided on the inner side surfaces of the left and right roof side rails (not shown) of the vehicle 112, respectively. When the curtain airbag 170 provided in this vehicle 112 is inflated and deployed, the head P1h of the left front seat occupant P1 and the head P2h of the rear seat occupant P2 seated in the front seat 136 and the rear seat 158 are exposed to the curtain airbag 170. be restrained and protected. In this case, the front side door 124 is deformed so as to be bent toward the interior of the vehicle. Accordingly, the inflated and deployed left curtain airbag 170 is also pushed by the bending portion 112C of the front side door 124 and bent inward in the vehicle width direction. As a result, the rear chamber 170R formed at the rear of the left curtain airbag 170 is drawn toward the front of the vehicle. When the rear chamber 170R is viewed in a plan cross-sectional view, the thickness of the rear end portion of the rear chamber 170R is thinner than the thickness of the main body portion of the rear chamber 170R. Therefore, when the rear chamber 170R is pulled toward the front of the vehicle due to the above phenomenon, the rear end of the rear chamber 170R is located outside the head P2h of the rear seat occupant P2 seated on the left side of the rear seat 158 in the vehicle width direction. Therefore, the contact time until the head P2h contacts the rear end portion of the rear chamber 170R is delayed. Therefore, restraint of the head P2h of the rear seat occupant P2 by the curtain airbag 170 may be delayed.

Furthermore, in the vehicle shown in FIG. 13, the curtain airbag 170 is inflated and deployed by gas generated by one inflator. However, the curtain airbag 170 is designed to face the front seats 134, 136 and the rear seat 158 from the outside in the vehicle width direction. That is, since the curtain airbag 170 has a large longitudinal dimension, the capacity of the curtain airbag 170 is large. Therefore, the time from when gas is supplied to the interior of the curtain airbag 170 until the curtain airbag 170 completes inflation and deployment is longer than that of a curtain airbag with a small capacity. Therefore, restraint of the head P2 of the rear seat occupant P2 in the rear seat 158 by the curtain airbag 170 tends to be delayed compared to a curtain airbag having a small capacity.

On the other hand, as shown in FIGS. 2 and 6, in the first embodiment, the rear seat curtain airbag 78 is provided separately and independently from the front seat side airbag 72. Therefore, the rear curtain airbag 78 is not affected by the behavior of the front seat side airbag 72 that is deformed by the collision site 12C. Further, the front end of the rear seat curtain airbag 78 in the fully deployed state in the front-rear direction is located at a position away from the rear end in the front-rear direction of the front seat side airbag 72 in the fully deployed state. Therefore, the front part of the rear curtain airbag 78 does not overlap the rear part of the front seat side airbag 72 when viewed from the vehicle width direction. For these reasons, the collision site 12C does not bend the rear curtain airbag 78 inward in the vehicle width direction, so the rear curtain airbag 78 is not drawn forward. Therefore, as shown in FIG. 6, there is a high possibility that the head P2h of the rear seat occupant P2 will be restrained by a portion located forward of the rear end of the rear seat curtain airbag 78. That is, there is a high possibility that the head P2h of the rear seat occupant P2 will be restrained by a portion that is thicker (dimension in the vehicle width direction) than the rear end of the rear seat curtain airbag 78. Further, the rear seat curtain airbag 78 is provided separately and independently from the front seat side airbag 72. Therefore, the capacity of the rear curtain airbag 78 is smaller than the capacity of an airbag in which the rear curtain airbag 78 and the front seat side airbag 72 are integrated. Therefore, the time from when gas is supplied to the inside of the rear curtain airbag 78 until the inflation and deployment of the rear curtain airbag 78 is completed is short. Therefore, there is little risk that restraint of the head P2h of the rear seat occupant P2 by the rear seat curtain airbag 78 will be delayed.

Further, the waist P2w and chest P2b of the rear seat occupant P2, which move relative to the left with respect to the vehicle 12 due to the inertial force caused by the collision, are protected by the resin door trim 30 of the left rear side door 28. Furthermore, since the rear wheel house 32 has high rigidity, the rear wheel house 32 secures a living space for the waist P2w and chest P2b of the left rear seat occupant P2. Therefore, as shown in FIG. 1, when the rear seat curtain airbag 78 is inflated and deployed, it faces the head P2h of the rear seat occupant P2 from the outside in the vehicle width direction, and faces the waist P2w and chest P2b. It is possible to make the size smaller than that. Therefore, the capacity of the rear curtain airbag 78 can be reduced, and the output of the second inflator 80 can be reduced. Therefore, the manufacturing cost of the airbag system 10 can be reduced.

In addition, when the front-rear middle part of the right front side door 24 of the running vehicle 12 has a side collision with the pole 88, which is a fixed object, the part where the pole 88 of the right front side door 24 collided (collision part 12C) ) is deformed so as to be bent toward the inside of the vehicle. Further, the ECU 82 sends an activation signal to the first inflator 74 and the second inflator 80 on the right side. In this case, the right front seat side airbag 72 ruptures the tear seam 34D of the seat back 34B of the front seat 34 and deforms the skin material constituting the right side of the seat back 34B. , expands downward and upward. As a result, as shown in FIGS. 2 and 3, the lower chamber 72A expands and deploys on the right side of the right front seat occupant P1.

Further, as shown in FIG. 3, when the expanded state of the upper chamber 72C is viewed in the front-rear direction, the upper chamber 72C is located above the outer shoulder P1s of the front seat occupant P1 on the right side. The shoulder webbing 46A, which restrains the upper body, is inflated and deployed between the rear surface and the side surface of the head P1h. The right front seat side airbag 72 inflated and deployed in this manner restrains the waist P1w, chest P1b, and head P1h of the front seat occupant P1, who has moved relative to the right side with respect to the vehicle 12 due to the inertia force caused by the collision.

Further, when the ECU 82 determines that a rollover has occurred in the vehicle 12 based on the signals output from the side impact sensor 84 and/or the oblique impact sensor 86, the ECU 82 Sends an activation signal to.

<Second embodiment>
Next, a second embodiment of a vehicle side-impact airbag system 90 (hereinafter abbreviated as airbag system 90) according to the present invention will be described with reference to FIGS. 7 to 12. Note that the same configurations as those in the first embodiment are given the same reference numerals, and description thereof will be omitted as appropriate.

As shown in FIG. 10, side support portions (side portions) 58B1 are provided at both ends of the seat back 58B of the rear seat 58 in the vehicle width direction on the outside in the vehicle width direction. Inside the left and right side support portions 58B1, metal side frames 58B2 are provided that extend in the vertical direction of each side support portion 58B1.

As shown in FIGS. 11A and 11B, the surface of the seat back 58B includes a front surface 58B3, a pair of left and right side surfaces 58B4, a top surface 58B5, and a rear surface 58B6. The surface of the seat back 58B is composed of a plurality of skin materials. Furthermore, the peripheral edges of adjacent skin materials are sewn together with thread. That is, a sewn portion is provided at the peripheral edge of each skin material.

Furthermore, a part of the sewn portion of the seat back 58B is constituted by a tear seam 58D shown in bold lines in FIGS. 11A and 11B. The tear seams 58D are provided on both left and right sides of the seat back 58B. The left and right tear seams 58D are provided at an adjacent portion between the front surface 58B3 and the side surface 58B4, an adjacent portion between the side surface 58B4 and the top surface 58B5, an upper end portion of the adjacent portion between the side surface 58B4 and the rear surface 58B6, and a portion near the upper end of the rear surface 58B6. There is.

The airbag system 90 of the second embodiment includes a side airbag 72, a first inflator 74, a side airbag (rear seat airbag) 92, a second inflator 94, an ECU 82, a side impact sensor 84, and an oblique impact sensor 86. have Airbag system 90 does not include curtain airbag 78 and second inflator 80.

As shown in FIG. 10, a side airbag 92 and a second inflator 94 are provided inside the left and right side support portions 58B1 of the seat back 58B. The side airbag 92 has the same specifications as the side airbag 72, and the second inflator 94 has the same specifications as the first inflator 74. That is, as shown in FIGS. 7, 9, 11A, and 11B, the side airbag 92 has a lower chamber 92A and an upper chamber 92C. Further, an upper portion 92B of the lower chamber 92A communicates with an upper chamber 92C.

As shown in FIG. 10, under normal conditions when the vehicle 12 is not in a collision, the side airbags 92 are stored in a folded state inside the left and right sides of the seat back 58B. A portion of the upper chamber 92C and the lower chamber 92A are housed inside the left and right side support portions 58B1. At this time, when viewed from the front, the lower chamber 92A is approximately parallel to the up-down direction, and the upper chamber 92C is approximately parallel to the left-right direction.

As shown in FIGS. 9 and 10, when the tongues 68 of the left and right seat belt devices 60 are attached to the buckles 70 (not shown in FIGS. 9 and 10), the left and right shoulder webbings 62A are It is inclined with respect to the vertical direction so as to extend inward in the vehicle width direction toward the lower side in the vertical direction. Furthermore, when the tongue 68 is attached to the buckle 70, when viewed from the front, the inner end in the vehicle width direction of the upper chamber 92C of the side airbag 92 is located at the same height as the upper chamber 92C of the shoulder webbing 62A. Located on the inside in the vehicle width direction.

The left and right second inflators 94 are housed inside each side support portion 58B1 so that their axial directions extend along the vertical direction of the seat back 58B. Furthermore, each second inflator 94 is formed with a plurality of gas jet ports (not shown) along the circumferential direction of the second inflator 94 . Further, inside each of the left and right side airbags 92, a diffuser 96, which is a cylindrical flexible member with both ends open, is provided. Each second inflator 94 is provided inside the diffuser 96. Further, as shown in FIG. 10, a plurality of stud bolts 94A protruding from the outer periphery of each second inflator 94 penetrate through the diffuser 96, the side airbag 92, and the side frame 58B2, and each stud bolt A nut 98 is screwed onto the tip of 94A. Thereby, the left and right second inflators 94 are fixed to the side frame 58B2 together with the side airbag 92 and the diffuser 96.

(action and effect)
Next, the functions and effects of the second embodiment will be explained. In the following description, the occupant P1 will be referred to as the front seat occupant P1, the occupant P2 will be referred to as the rear seat occupant P2, the side airbag 72 will be referred to as the front seat side airbag 72, and the side airbag 92 will be referred to as the rear seat side airbag 92. It is sometimes called.

For example, as shown in FIG. 12, it is assumed that the front-rear intermediate portion of the left front side door 24 of the vehicle 12 while running is in a side collision with a pole 88, which is a fixed object. In this case, the collision site 12C of the front side door 24 is deformed so as to be bent toward the interior of the vehicle. Further, at least one of a side collision signal and an oblique collision signal is output, and the ECU 82 transmits an activation signal to the first inflator 74 and the second inflator 94 on the left side.

As a result, gas is injected from the gas outlet of the first inflator 74 on the left side, as shown by the imaginary line in FIG. As a result, the left front seat side airbag 72 is inflated and deployed forward, below, and above the side support portion 36B1, similarly to the first embodiment. Therefore, the waist P1w, chest P1b, and head P1h of the front seat occupant P1, which have moved relative to the left with respect to the vehicle 12 due to the inertial force caused by the collision, are restrained by the left front seat side airbag 72.

Further, gas is injected from the gas outlet of the second inflator 94 on the left side, and the injected gas flows into the inside of the rear seat side airbag 92 on the left side. As a result, the left rear seat side airbag 92 ruptures the left tear seam 58D of the seat back 58B and deforms the skin material forming the left side of the seat back 58B (see imaginary lines in FIGS. 11A and 11B). , inflates and deploys toward the front side, lower side, and upper side of the side support portion 58B1. As a result, as shown in FIG. 7, the lower chamber 92A expands and deploys on the left side of the rear seat occupant P2. That is, the lower chamber 92A of the left rear seat side airbag 92 faces the waist P2w and chest P2b of the rear seat occupant P2 from the outside in the vehicle width direction.

Furthermore, as shown in FIGS. 9 and 10, when the expanded state of the upper chamber 92C is viewed in the front-rear direction, the upper chamber 92C is located above the outer shoulder P2s of the rear seat occupant P2. The shoulder webbing 62A that restrains the upper body of P2 is inflated and deployed between the rear surface of the shoulder webbing 62A and the side surface of the head P2h. Therefore, when the head P2h of the rear seat occupant P2 is displaced outward in the vehicle width direction during a side collision, the upper chamber 92C is sandwiched between the outer side surface of the head P2h and the rear surface of the shoulder webbing 62A. Thereby, the upper chamber 92C takes a reaction force from the rear surface of the shoulder webbing 62A and restrains the head P2h of the rear seat occupant P2. As a result, the upper chamber 92C faces the head P2h while receiving a reaction force from the rear surface of the shoulder webbing 62A in a direction toward the head P2h. The left rear seat side airbag 92 inflated and deployed in this way restrains the waist P2w, chest P2b, and head P2h of the rear seat occupant P2, who has moved relative to the left with respect to the vehicle 12 due to the inertia force caused by the collision.

In this way, the upper chamber 92C faces the head P2h while receiving a reaction force from the rear surface of the shoulder webbing 62A, and therefore exhibits high initial restraint performance. Furthermore, since the rear surface of the shoulder webbing 62A presses the upper chamber 92C, when an oblique collision occurs in the vehicle 12, restraint of the head P2h by the upper chamber 92C is hardly delayed.

Furthermore, in the second embodiment as well, the rear seat side airbag 92 is provided separately and independently from the front seat side airbag 72, so that the rear seat side airbag 92 behaves differently than the front seat side airbag 72. Not affected by Further, the front end in the longitudinal direction of the rear seat side airbag 92 in the fully deployed state is located at a position farther rearward from the rear end in the longitudinal direction of the front seat side airbag 72 in the fully deployed state. Therefore, the front part of the rear seat side air bag 92 does not overlap the rear part of the front seat side air bag 72 when viewed from the vehicle width direction. For these reasons, the collision site 12C does not bend the rear seat side air bag 92 inward in the vehicle width direction, so the rear seat side air bag 92 is not drawn forward. Further, as described above, the rear seat side airbag 92 is fixed to the metal side frame 58B2 provided inside the side support portion 58B1 with stud bolts 94A and nuts 98. Therefore, the rear seat side airbag 92 is not drawn forward by the collision site 12C. Therefore, as shown in FIG. 12, there is a high possibility that the head P2h of the rear seat occupant P2 will be restrained by the center portion of the rear seat side airbag 92 in the longitudinal direction. That is, there is a high possibility that the head P2h of the rear seat occupant P2 will be restrained by the central portion of the rear seat side airbag 92, which has a large thickness (dimension in the vehicle width direction). Further, the rear seat side airbag 92 is separate and independent from the front seat side airbag 72. Therefore, the capacity of the rear seat side airbag 92 is smaller than the capacity of an airbag in which the front seat side airbag 72 and the rear seat side airbag 92 are integrated. Therefore, the time from when gas is supplied to the inside of the rear seat side airbag 92 until the inflation and deployment of the rear seat side airbag 92 is completed is short. Therefore, there is little possibility that restraint of the head P2h of the rear seat occupant P2 by the rear seat side airbag 92 will be delayed.

Note that when the longitudinally intermediate portion of the right front side door 24 of the vehicle 12 of the second embodiment that is running collides with the pole 88, which is a fixed object, the pole 88 of the right front side door 24 collides with the pole 88, which is a fixed object. The portion (collision portion 12C) is deformed so as to be bent toward the interior of the vehicle. Further, the ECU 82 sends an activation signal to the first inflator 74 and the second inflator 94 on the right side. In this case, similarly to the first embodiment, the right front seat side airbag 72 is inflated and deployed. Further, the right rear seat side airbag 92 ruptures the right tear seam 58D of the seat back 58B of the rear seat 58 and deforms the skin material constituting the right side of the seat back 58B, while moving the front side of the side support portion 58B1. , expands downward and upward. As shown in FIG. 9, when the right side upper chamber 92C is viewed in the front-rear direction when the expanded state is completed, the upper chamber 92C is located above the outer shoulder P2s of the right rear seat occupant P2 in the rear seat. The shoulder webbing 62A, which restrains the upper body of the occupant P2, is inflated and deployed between the rear surface and the side surface of the head P2h.

Further, when the ECU 82 determines that a rollover has occurred in the vehicle 12 based on the signals output from the side collision sensor 84 and/or the oblique collision sensor 86, the ECU 82 Sends an activation signal to.

Although the first and second embodiments of the present invention have been described above, the present invention is not limited to these embodiments.

When the fully deployed state of the upper chambers 72C, 92C of the side airbags 72, 92 is viewed in the front-rear direction, the upper chambers 72C, 92C are positioned above the outer shoulders P1s, P2s of the occupant P1, P2. , the front seats 34, 36, the rear seats 58, the seat belt devices 44, 60 and Side airbags 72 and 92 may also be configured.

Three or more rows of seats arranged in the front-rear direction may be provided in the cabin 14A of the vehicle 12. In this case, the seats in the front row will be the "front seats" in the scope of the claims, and the seats in the second row and the seats behind the second row seats will be the "rear seats" in the scope of the claims. Furthermore, in this case, the "rear seat airbag" in the claims is a single curtain airbag located on the side of two or more seats arranged in the front and back direction that constitute the rear seat when inflated and deployed. may also be used.

The front seat 36 may be a passenger seat, and the front seat 34 may be a driver's seat.

10 Vehicle side impact airbag system (airbag system)
12 Vehicle 34 36 Front seat 44 Seat belt device 46 Webbing 46A Shoulder webbing 58 Rear seat 60 Seat belt device 62 Webbing 62A Shoulder webbing 72 Side airbag (front seat airbag)
72A Lower chamber 72C Upper chamber 74 First inflator 78 Curtain airbag (rear seat airbag)
80 Second inflator 82 ECU
84 Side collision sensor 86 Oblique collision sensor 88 Pole 90 Vehicle side collision airbag system (airbag system)
92 Side airbag (rear seat airbag)
92A Lower chamber 92C Upper chamber 94 Second inflator P1 Dummy (crew)
P1b Chest P1h Head P1w Waist P2 Dummy (crew)
P2b Chest P2h Head P2w Waist

Claims (2)

A front seat airbag that is inflated and deployed from the outside in the width direction of the vehicle against the waist, chest, and head of an occupant seated in the front seat using gas supplied inside the vehicle in the event of a side collision of the vehicle;
The airbag is provided separately and independently from the front seat airbag, and in the event of a side collision of the vehicle, the airbag faces the head of an occupant seated in the rear seat from the outside in the width direction of the vehicle using gas supplied inside. a rear seat airbag that is inflated and deployed as shown in FIG.
Equipped with
The front seat airbag is at least partially stored in the outer side of the seatback of the front seat, and when gas is supplied inside the front seat airbag, the front seat airbag is designed to protect the lower back, chest, and head of an occupant seated in the front seat. A side airbag that is inflated and deployed from the outside in the vehicle width direction,
The upper end of the rear seat airbag is supported by the roof side rail of the vehicle, and when gas is supplied to the inside, the rear seat airbag is located outside in the vehicle width direction with respect to the head rather than the waist of the occupant seated in the rear seat. It is a curtain airbag that inflates and deploys toward the lower side of the vehicle, facing from the
The side airbag is
a lower chamber that is inflated and deployed to face the waist and chest of the occupant from the outside in the vehicle width direction when gas is supplied therein;
Webbing on the shoulder side that is in communication with the lower chamber and restrains the upper body of the occupant at the upper side of the vehicle at the outer shoulder portion of the occupant when viewed in the longitudinal direction of the vehicle in a fully deployed state in which gas is supplied to the inside. an upper chamber that is inflated and deployed between the rear surface and the side surface of the occupant's head to restrain the occupant's head;
has
When the front seat is viewed from the front with the webbing attached to the passenger before gas is supplied to the interior, the inner end of the upper chamber in the vehicle width direction is located above the upper part of the webbing on the shoulder side. A side impact airbag system for vehicles that is located on the inside in the vehicle width direction from the part located at the same height as the chamber . The side airbag is
a lower chamber that is inflated and deployed to face the waist and chest of the occupant from the outside in the vehicle width direction when gas is supplied therein;
The fully deployed state where the lower chamber is in communication and gas is supplied inside is shown in the longitudinal direction of the vehicle.
When viewed from above, the webbing on the shoulder side that restrains the upper body of the occupant is inflated and deployed between the rear surface of the webbing on the shoulder side that restrains the occupant's upper body on the outer side of the vehicle, and the side surface of the occupant's head. an upper chamber that restrains the
has
The tear seam provided on the side of the surface of the seat back of the front seat includes a portion adjacent to the front and side surfaces of the surface of the seat back, a portion adjacent to the side surface and the top surface of the surface, and a portion adjacent to the top surface of the surface. The side impact airbag system for a vehicle according to claim 1, wherein the side impact airbag system for a vehicle is provided at an upper end of a portion where a side surface and a rear surface are adjacent to each other and near an upper end of the rear surface.