WO2022220082A1 - エアバッグ装置 - Google Patents
エアバッグ装置 Download PDFInfo
- Publication number
- WO2022220082A1 WO2022220082A1 PCT/JP2022/014881 JP2022014881W WO2022220082A1 WO 2022220082 A1 WO2022220082 A1 WO 2022220082A1 JP 2022014881 W JP2022014881 W JP 2022014881W WO 2022220082 A1 WO2022220082 A1 WO 2022220082A1
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- WO
- WIPO (PCT)
- Prior art keywords
- airbag
- cushion
- seat
- hole
- occupant
- Prior art date
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- 238000010586 diagram Methods 0.000 description 13
- 238000012986 modification Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 210000001015 abdomen Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009958 sewing Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 101001108245 Cavia porcellus Neuronal pentraxin-2 Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
- B60R2021/23146—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection seat mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R2021/23161—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for protecting at least two passengers, e.g. preventing them from hitting each other
Definitions
- the present invention relates to an airbag device or the like that protects the sides of an occupant.
- airbag devices have been known to protect passengers in the event of a vehicle side collision or rollover.
- the airbag inflates and deploys so as to cover the sides of the passenger seated on the seat.
- Patent Document 1 describes an occupant restraint device that can protect the occupant against both near-side and far-side impacts as this type of airbag device.
- This occupant restraint system includes an airbag that cares for the occupant against impact from the near side, and an upper torso restraint member that cares for the occupant against impact from the far side.
- the upper torso restraint member abuts against the shoulder or chest of the occupant from the front side of the vehicle to restrain the occupant in the seat.
- FIG. 6 of Patent Document 1 describes a mode in which an airbag is used as the upper torso restraint member.
- the conventional airbag device By the way, when a vehicle side collision occurs, the occupant moves toward the side of the collision due to the inertial force at the beginning of the collision, and then moves toward the opposite side due to the impact force due to the collision.
- the near-side airbag and the far-side airbag are independent of each other. Therefore, in the conventional airbag device, the side cushions that are inflated and deployed on both sides of the seat do not cooperate with each other so as to suppress the movement of the occupant in accordance with the direction in which the occupant moves. Therefore, the conventional airbag device may not be able to effectively restrain the moving occupant as described above.
- An object of the present invention is to provide an airbag device capable of stabilizing the position, etc., during inflation and deployment.
- An airbag device includes a first side cushion that inflates and deploys to cover one side of an occupant seated in a vehicle seat, and a second side cushion that inflates and deploys to cover the other side of the occupant.
- an airbag having a cushion, a through hole through which an attachment member for attaching a headrest to the backrest of a seat can be inserted, and a connecting member connecting the first side cushion and the second side cushion; and inflating the airbag. and an inflator for injecting gas to inject air to inflate the airbag, and the attachment member is inserted through the through-hole of the connection member when the airbag is inflated and deployed.
- the mounting member may be a support member that supports the headrest.
- connection member is a duct through which gas can flow, and the periphery of the through hole may be partitioned from the gas flow path of the duct.
- the inflator may be attached to the first side cushion, and part of the gas injected from the inflator to the first side cushion may be supplied to the second side cushion through the duct.
- the shape and size of the through hole may match the shape and size of the mounting member.
- the through-hole may be oval or elliptical, and the through-hole may be arranged so that the major axis direction of the oval or ellipse is the longitudinal direction of the connecting member.
- the through-hole may be slit-shaped.
- the through hole may be provided in the central portion of the connecting member in the width direction.
- the duct has a widened portion whose width is increased in a direction intersecting the extension direction of the duct in a flat state in which an uninflated airbag is spread out and laid flat on a flat surface.
- the widened portion may have a portion that expands toward the rear of the seat in the fully inflated state.
- the widened portion includes a rear chamber located behind the through hole and a front chamber located forward of the through hole in a flat state, and the mounting member is a support member for supporting the headrest, In the fully inflated state, the rear chamber may be located behind the support member and serve as a cushion for protecting the head of the rear seat occupant.
- the width of the rear chamber in the front-rear direction may be longer than the width of the front chamber in the front-rear direction.
- one of the first side cushion and the second side cushion is provided with a fixing portion to the seat, and the other is provided with an inflator storage portion, and the airbag includes the fixing portion and the inflator storage portion. and may be fixed to the seat.
- connection member may not be provided with a fixing portion to the seat.
- connection member that connects the first side cushion and the second side cushion has a through hole through which the attachment member for attaching the headrest to the backrest portion can be inserted.
- the attachment member is inserted through the through hole of the connection member.
- the connecting member is positioned between the upper portion of the backrest portion and the lower portion of the headrest and extends in the width direction of the seat.
- one of the side cushions receives the impact load of the occupant and moves outward in the upper height range of the seat corresponding to the upper range from the shoulder of the occupant.
- the other side cushion is pulled laterally via the connecting member and moves toward the occupant. Also, when the occupant moves toward the side opposite to the initial stage of the collision, the occupant collides with the other side cushion.
- connection member can be stabilized at a position within the height range where the occupant first collides in the fully inflated state. Therefore, a lateral load acts directly on the connecting member. Therefore, both side cushions move laterally as a unit compared to an airbag in which the two side cushions are connected above the occupant's head, for example. As a result, the distance traveled by the occupant moving to the side opposite to that at the initial stage of the collision until it collides with the other side cushion is shortened, and the occupant can be restrained early.
- the mounting member since the mounting member is inserted through the through hole of the connecting member, it is possible to prevent the airbag itself from fluttering during inflation and deployment.
- the mounting member since the mounting member is inserted through the through hole of the connecting member, the amount of outward movement of the side cushion, which receives the impact load when the occupant first collides, can be suppressed.
- the side cushions on both sides of the seat behave integrally in the event of a side collision or the like, and the position of the connection member when inflated and deployed can be stabilized.
- FIG. 1A is a diagram showing a state in which the inflation and deployment of the airbag according to the embodiment is completed, and is a diagram of a seat on which an occupant is seated as seen from the front.
- FIG. 1B is a diagram showing a state in which inflation and deployment of the airbag is completed, and is a diagram of a seat with no occupant as viewed from the front.
- FIG. 1C is a diagram showing a state in which the inflation and deployment of the airbag is completed, and is a diagram of the seat with no occupant seen from the side of the first side cushion.
- FIG. 1D is a diagram showing a state in which the inflation and deployment of the airbag is completed, and is a diagram of the seat with no occupant seen from the side of the second side cushion.
- FIG. 1A is a diagram showing a state in which the inflation and deployment of the airbag according to the embodiment is completed, and is a diagram of a seat on which an occupant is seated as seen from the front.
- FIG. 1E is a diagram showing a state in which the inflation and deployment of the airbag is completed, and is a diagram of the seat with no occupant as viewed from above.
- FIG. 2 is a plan view of the airbag in a flat state.
- FIG. 3A(a) is a plan view of an airbag for explaining an embodiment in which through holes are oval
- FIG. 3A(b) is a plan view for explaining an embodiment in which through holes are oval.
- It is a top view of an airbag.
- FIG. 3B is a plan view of an airbag for explaining an embodiment in which the through-holes are one continuous slit.
- FIG. 3C is a plan view of the airbag for explaining an embodiment in which the through hole is divided into two slits.
- FIG. 4A(a) is a plan view of an airbag for explaining an example of an airbag folding method
- FIG. 4A(b) is a cross-sectional view taken along line AA in FIG. 4A(a).
- FIG. 4B is a plan view of the airbag for explaining another example of the folding method of the airbag.
- FIG. 5 is a front view of the seat with the airbag retracted.
- FIG. 6 is a view for explaining the behavior of the first side cushion when an occupant collides with the second side cushion, and is a view of the fully inflated airbag seen obliquely from behind the headrest.
- FIGS. 7(a) and 7(b) are diagrams for explaining a state in which the first side cushion is interposed between the seat belt and the occupant.
- FIG. 8 is a plan view of the airbag according to the first modified example of the embodiment in a flat state.
- FIG. 9 is a diagram of the airbag according to the first modified example of the embodiment, viewed obliquely from the upper rear side of the headrest in the fully inflated state.
- FIG. 10(a) is a plan view of an airbag according to a second modification of the embodiment in a flat state
- FIG. 10(b) is a front view of the upper part of the seat in the fully inflated state.
- FIGS. 11(a) and 11(b) are diagrams for explaining problems when the connection member (gas duct) is not provided with through holes.
- the terms “upper” and “upper” mean the direction of the head of the occupant 5 seated in the normal position of the seat 1, and the terms “lower” and “lower” mean the direction of the feet of the occupant 5.
- the "normal position” is the center position of the seat cushion 2 in the seat 1 in the left-right direction, and the position where the back of the occupant 5 is in contact with the backrest portion 3 of the seat 1 from above and below.
- the terms “front” and “front side” may mean the front direction of the occupant 5 seated in the normal position of the seat 1
- the terms “rear” and “rear side” may mean the back direction of the occupant 5 .
- the terms “left” and “left side” may refer to the left side of the occupant 5 seated in the normal position of the seat 1, and the terms “right” and “right side” may refer to the right side of the occupant 5.
- the occupant 5 is assumed to be a WorldSID (World Side Impact Dummy) AM50 (50th percentile of American adult males).
- the "regular position” may be referred to as "regular seating position”.
- the present embodiment is an airbag device 10 in which side cushions 21 and 22 provided on both sides of a seat 1 in a vehicle behave integrally in the event of a side collision or rollover of a vehicle such as a passenger car. is.
- the side cushions 21 and 22 on both sides are integrated into one airbag 11 .
- the seat 1 on which the airbag device 10 is mounted will be described below.
- the seat 1 includes a seat cushion 2 and a backrest portion 3, as shown in FIGS. 1A to 1E.
- a headrest 4 is attached to the upper end portion of the backrest portion 3 via a rod-shaped support member 6 .
- the support member 6 is positioned between the upper portion of the backrest portion 3 and the lower portion of the headrest 4 .
- the support member 6 corresponds to an attachment member for attaching the headrest 4 to the backrest portion 3 .
- the side closer to the door for seat 1 may be called “near side”
- the side farther from the door for seat 1 may be called "far side”.
- the airbag device 10 includes an airbag 11 and an inflator 12 (see FIG. 1C).
- the airbag 11 is a fabric bag.
- the inflator 12 is a device that injects gas for inflating the airbag 11 .
- an example of an airbag device 10 provided on a driver's seat or a passenger's seat 1 adjacent to each other on the left and right will be described.
- the airbag 11 includes a first side cushion 21 that inflates and deploys so as to cover one side of the occupant 5 in the normal seating position, and the other side of the occupant 5 in the normal seating position. and a gas duct 23 that communicates the first side cushion 21 and the second side cushion 22 with each other.
- the gas duct 23 corresponds to a connecting member that connects the first side cushion 21 and the second side cushion 22 .
- the first side cushion 21 is provided on the near side of the seat 1.
- the rear side of the first side cushion 21 is fixed to the near side of the seat 1.
- the first side cushion 21 extends forward from its fixed position to the seat 1, as shown in FIG. 1C.
- the first side cushions 21 include a first head cushion portion 31 that inflates and deploys so as to cover one side of the head of the occupant 5 in the normal sitting position, and a torso (shoulder area) of the occupant 5 in the normal sitting position. and a first body cushion portion 41 that is inflated and deployed so as to cover one side of the body (from the body to the abdomen).
- the first head cushion portion 31 stands obliquely upward in a rearward direction from the front portion of the first body cushion portion 41 .
- the second side cushion 22 is provided on the far side of the seat 1.
- the rear side of the second side cushion 22 is fixed to the far side of the seat 1.
- the second side cushion 22 extends forward from its fixed point to the seat 1, as shown in FIG. 1D.
- the second side cushions 22 include a second head cushion portion 32 that inflates and deploys so as to cover the other side of the head of the occupant 5 in the normal sitting position, and a torso (shoulder area) of the occupant 5 in the normal seating position. part) is inflated and deployed to cover the other side of the body.
- the second head cushion portion 32 stands obliquely upward in a rearward direction from the front portion of the second body cushion portion 42 .
- the gas duct 23 is formed in a tubular shape so that gas can flow inside.
- the gas duct 23 is provided with a through hole 24 through which the support member 6 is inserted.
- the support member 6 is inserted through the through hole 24 of the gas duct 23 when the first side cushion 21 and the second side cushion 22 are inflated and deployed. Therefore, the first side cushion 21 and the second side cushion 22 do not flutter even in the middle of inflation and deployment. Further, since the support member 6 is inserted through the through hole 24 of the gas duct 23, the gas duct 23 is stabilized at a position between the upper end of the backrest 3 and the lower end of the headrest 4 during inflation and deployment.
- the gas duct 23 extends in the width direction of the seat 1 at a position between the upper end of the backrest portion 3 and the lower end of the headrest 4 .
- One end of the gas duct 23 opens inside the first side cushion 21
- the other end of the gas duct 23 opens inside the second side cushion 22 .
- the gas duct 23 is thick enough to touch both the upper end of the backrest 3 and the lower end of the headrest 4 .
- two circular through-holes 24 are provided at intervals in the central portion of the gas duct 23 in the width direction (diameter direction). 6 are respectively inserted.
- a through-hole 24 is provided in the central portion of the gas duct 23 in the width direction (diameter direction). Therefore, the gas duct 23 can be positioned directly below the headrest 4 .
- the gas duct 23 extends in the width direction of the seat 1 along the upper end surface of the backrest portion 3 below the headrest 4 .
- the airbag 11 is a bag formed by stacking two base fabrics of the same shape and size and sewing them at predetermined locations such as the outer periphery. In FIG. 2, the sewing location is represented by a thick dashed line. As shown in FIG. 2, the airbag 11 has a laterally long substantially rectangular shape. In the description of the airbag 11 in a flat state, the longitudinal direction of the airbag 11 is called the "left-right direction” and the short direction thereof is called the “front-rear direction”. 2) is called the "rear side", and the opposite side is called the "front side”. Note that the upper side of the airbag shown in FIG. 2 is the rear side even in the fully inflated state.
- the airbag 11 includes a gas duct 23 extending in the left-right direction, a first side cushion 21 connected to one end of the gas duct 23, and a second side cushion 22 connected to the other end of the gas duct 23.
- the gas duct 23 is provided on the rear side of the airbag 11 and has a horizontally long, substantially rectangular shape.
- the longitudinal dimension (thickness) of the gas duct 23 is half or less than the longitudinal dimension of each of the side cushions 21 and 22 .
- two circular through-holes 24 are provided in the central portion of the gas duct 23 in the front-rear direction at intervals.
- One through-hole 24 is disposed at a position in the same direction as the flow of gas flowing through the gas duct 23 with respect to the other through-hole 24 .
- the shape of the through hole 24 is circular, the shape of the support member 6 is cylindrical, and the inner diameter of the through hole 24 matches the outer diameter of the support member 6 . That is, the shape and size of the through holes 24 match the shape and size of the support member 6 .
- the term “matched” means that the shapes and sizes are uniform while providing a margin for inserting the support member 6 into the through hole 24 .
- the gas duct 23 is sewn around the through hole 24 as shown in FIG.
- the through hole 24 is separated from the gas flow path in the gas duct 23 by sewing.
- the front end of the gas duct 23 (the position of the horizontal slit 35 in FIG. 2) is located behind the front ends of the first side cushion 21 and the second side cushion 22 .
- the first side cushion 21 has a first body cushion portion 41 positioned outside the gas duct 23 in the left-right direction, and a first head cushion portion 31 positioned in front of the gas duct 23 .
- the first body cushion portion 41 extends forward beyond the front end of the gas duct 23 .
- the first head cushion portion 31 extends inward in the left-right direction (to the left in FIG. 2) from a portion of the first body cushion portion 41 that extends forward.
- the first body cushion portion 41 corresponds to the outer cushion portion, and the first head cushion portion 31 corresponds to the inner cushion portion.
- the first head cushion part 31 has a substantially rectangular shape (or a substantially square shape).
- the first head cushion portion 31 is adjacent to the gas duct 23 via a horizontal slit 35 extending in the left-right direction.
- the first body cushion portion 41 has a laterally long substantially rectangular shape. Strictly speaking, the first body cushion portion 41 is an outer portion in the left-right direction, and the dimension in the front-rear direction gradually decreases toward the outer end.
- a portion of the first body cushion portion 41 on the side of the gas duct 23 constitutes an upper cushion portion 41 a for protecting the side portion of the shoulder of the occupant 5 .
- a portion of the first body cushion portion 41 opposite to the gas duct 23 constitutes a lower cushion portion 41b for protecting the sides of the chest and abdomen of the occupant 5 .
- a housing portion 45 for the inflator 12 is formed on the rear side of the first body cushion portion 41 .
- a gas guide 18 is provided in the storage portion 45 .
- the gas guide 18 has a first outlet 18a that opens to the upper cushion portion 41a and a second outlet 18b that opens to the lower cushion portion 41b as outlets for the gas injected from the inflator 12 .
- the second side cushion 22 has a second body cushion portion 42 positioned outside the gas duct 23 in the left-right direction, and a second head cushion portion 32 positioned in front of the gas duct 23 .
- the second body cushion portion 42 extends forward beyond the front end of the gas duct 23 .
- the second head cushion portion 32 extends inward in the left-right direction (to the right in FIG. 2) from a portion of the second body cushion portion 42 that extends forward.
- the second body cushion portion 42 corresponds to the outer cushion portion
- the second head cushion portion 32 corresponds to the inner cushion portion.
- the second head cushion part 32 has a substantially rectangular shape (or a substantially square shape).
- the second head cushion portion 32 is adjacent to the gas duct 23 via the horizontal slit 35 described above.
- the second body cushion portion 42 has a substantially rectangular shape that is slightly vertically long.
- the second body cushion part 42 is a part for protecting the side part of the shoulder of the occupant 5 .
- the tips of the first head cushion part 31 and the second head cushion part 32 are adjacent to each other via a longitudinal slit 36 extending in the front-rear direction.
- the first head cushion part 31 and the second head cushion part 32 are formed symmetrically with the vertical slit 36 interposed therebetween.
- the vertical slit 36 is a slit extending in the front-rear direction from the front end of the airbag 11 and connected to the center position of the horizontal slit 35 on the rear side.
- the horizontal slits 35 extend leftward and rightward from the positions of the rear ends of the vertical slits 36 . Combining the horizontal slit 35 and the vertical slit 36 forms a substantially T-shaped notch.
- a tab 16 is provided at the rear end of the airbag 11 as a fixing portion for fixing the airbag 11 to the seat frame 1 a of the seat 1 .
- the tab 16 is provided at the outer end of the second side cushion 22 (the left end in FIG. 2).
- the tab 16 may be provided at the outer end of the first side cushion 21 (the right end in FIG. 2).
- the airbag 11 is attached to the seat 1 at two points: the tab 16 that fixes the outer end of either one of the first side cushion 21 or the second side cushion 22, and the storage portion 45 of the inflator 12. can be fixed.
- the tab 16 may be, for example, the end of the gas duct 23 on the side of the first side cushion 21 (the right end in FIG. 2), the end of the gas duct 23 on the side of the second side cushion 22 (in FIG. It is also possible to provide a tab on the left end, etc., and fix the airbag 11 with a plurality of tabs.
- the position of the gas duct 23 can be stabilized because the support member 6 that supports the headrest 4 is inserted through the through hole 24 in the fully inflated state. For this reason, the number of tabs 16 used for attaching the airbag 11 to the seat frame 1a can be reduced, and only one tab 16 can be used as in the present embodiment. By minimizing the number of tabs 16, modification of the seat frame 1a to match the airbag 11 is facilitated.
- the through hole 24 may be oval with the longitudinal direction of the gas duct 23 (horizontal direction in FIG. 3A(a)) as the major axis direction.
- the gas duct 23 may have an elliptical shape whose major axis is the longitudinal direction (horizontal direction in FIG. 3A(b)).
- the support member 6 It is possible to increase the degree of freedom for the distance between. Therefore, it is possible to increase the number of products of the seat 1 that can accommodate the airbag 11 .
- the through hole 24 may be slit-shaped.
- one continuous slit may be used as shown in FIG. 3B, or two separate slits may be used as shown in FIG. 3C. Both slits have cuts in the same direction as the longitudinal direction of the gas duct 23 (horizontal direction in FIGS. 3B and 3C).
- Such a slit-shaped through-hole 24 can also increase the degree of freedom regarding the distance between the two support members 6, and can increase the number of products corresponding to the airbag 11.
- FIG. In this embodiment, the slit of the through-hole 24 is a cut with almost no gap, but it may be a cut with a certain amount of gap.
- the circumference of the through hole 24 is sewn as shown in FIGS. 3A to 3C.
- the through hole 24 is separated from the gas flow path in the gas duct 23 by sewing the perimeter of the through hole 24 .
- the airbag 11 When the airbag 11 is laid flat as shown in FIG. 2, it is rolled from the front side to the rear side or folded from the front side to the rear side in a bellows shape, thereby shortening the dimension in the front-rear direction. It becomes a storage form when it is stored in the seat 1.
- the airbag 11 may be wound on the front side or the back side of FIG. Also, substantially the entire airbag 11 may be rolled, or may be rolled halfway in the front-rear direction.
- each head cushion is placed inside each of the body cushion portions 41 and 42 as shown in FIG. 4A.
- the parts 31 and 32 may be pushed.
- each head is folded at a position overlapping the outer surfaces of the body cushion portions 41 and 42 as shown in FIG. 4B .
- the part cushion parts 31 and 32 may be folded in a bellows shape.
- the head cushion portions 31 and 32 are pushed into the body cushion portions 41 and 42 in the stored state of the airbag 11 .
- the folding method of FIG. 4B the head cushion portions 31 and 32 are folded so as to overlap the outer surfaces of the body cushion portions 41 and 42 in the stored state of the airbag 1 .
- the airbag 11 moves the whole or most of the head cushions 31 and 32 outside the positions of the roots of the head cushions 31 and 32 in the flat state. , the portion of the gas duct 23 becomes thinner than the other portions.
- the stored airbag 11 is stored in the seat 1 while being folded along the seat frame 1a.
- the gas duct 23 is housed in the upper end of the backrest part 3
- the first side cushion 21 is housed in the near side of the seat 1
- the second side cushion 22 is housed in the far side of the seat 1.
- a pair of support members 6 are provided at the upper end of the backrest portion 3 to support the headrest 4 with respect to the seat frame 1a.
- the airbag 11 can be stored on the front side or the rear side between the pair of support members 6 at the upper end portion of the backrest portion 3. part will be secured.
- the width that can be secured as the storage portion for the airbag 11 is narrow.
- both the front side and the rear side of the pair of support members 6 are used as storage portions, and the storage portion for the airbag 11 is widened.
- the installed airbag 11 housed in the seat 1 is fixed to the seat frame 1a of the seat 1 at two points, the tab 16 and the housing portion 45 of the inflator 12 .
- the inflator 12 is fixed to the seat frame 1a by stud bolts (not shown).
- the storage portion 45 is also fixed to the seat frame 1a by passing the stud bolt through the insertion hole of the storage portion 45. As shown in FIG.
- the support member 6 for supporting and attaching the headrest 4 to the seat frame 1 a is inserted through the through hole 24 of the gas duct 23 . Therefore, in this embodiment, when the gas injected from the inflator 12 flows, the shape of the gas duct 23 is stabilized, and the gas flows smoothly in the gas duct 23 . Further, in the present embodiment, the support member 6 is inserted through the through hole 24, and the position of the gas duct 23 is stabilized. The amount of outward movement of the side cushion 22 can be suppressed. In this embodiment where these effects are obtained, tabs for fixing the inlet side and/or the outlet side of the gas duct 23 can be omitted. As shown in FIG. 5, the gas duct 23 is not provided with a fixture (tab 16) for the seat frame 1a. As a result, the number of tabs 16 is reduced to one, and modification of the seat frame 1a to match the airbag 11 is facilitated.
- the outer lateral sides of the body cushion portions 41 and 42 in the flat state are on the lower side.
- the body cushion portion 42 is fixed to the seat frame 1a by the tab 16 at its leftward outer end portion in the flat state.
- a vertical slit 36 is provided between the head cushion portions 31 and 32 . Therefore, when the body cushion portions 41 and 42 inflate and deploy forward, the head cushion portions 31 and 32 rise upward.
- the inflator 12 when the vehicle is impacted by, for example, a side collision or a rollover, the inflator 12 receives a signal from the sensor and injects gas into the first side cushion 21, thereby The side cushions 21 are inflated and deployed. Also, part of the gas injected from the inflator 12 to the first side cushion 21 is supplied to the second side cushion 22 through the gas duct 23 . Thereby, the second side cushion 22 is inflated and deployed. In the fully inflated state, the gas duct 23 connecting the first side cushion 21 and the second side cushion 22 is positioned between the upper portion of the backrest portion 3 and the lower portion of the headrest 4 of the seat 1 . In addition, the first side cushion 21 and the second side cushion 22 are opposed to each other with the occupant 5 interposed therebetween.
- the occupant 5 seated in the seat 1 largely moves laterally above the shoulder of the torso and collides with the second side cushion 22 .
- the second side cushion 22 receives the impact load of the occupant 5 and moves outward in the upper height range of the seat 1 corresponding to the upper range from the shoulder of the occupant 5 .
- the first side cushion 21 is pulled laterally through the gas duct 23 and moves toward the occupant 5 .
- the occupant 5 collides with the first side cushion 21 .
- the first side cushion 21 receives the impact load of the occupant 5 and moves outward, and along with this movement, the second side cushion 22 moves laterally through the gas duct 23. , and moves toward the occupant 5 side.
- the gas duct 23 is positioned in the height range where the occupant 5 first collides. Therefore, a lateral load acts directly on the gas duct 23 . Therefore, both side cushions 21 and 22 move laterally together as compared with an airbag in which both side cushions are connected above the head of the occupant, for example. As a result, the distance traveled by the occupant 5 moving in the opposite direction to that at the beginning of the collision until it collides with the side cushions 21 and 22 is shortened, and the occupant 5 can be restrained early. Further, in this embodiment, since the mounting member is inserted through the through hole 24 of the gas duct 23, it is possible to prevent the first side cushion 21 and the second side cushion 22 from fluttering even in the middle of inflation and deployment.
- the support member 6 since the support member 6 is inserted through the through hole 24 of the gas duct 23 at the time of inflation and deployment, the side cushions 21 and 22 that receive the impact load when the occupant 1 first collides are held back, thereby The amount of movement to the outside can be suppressed. This amount of movement can be made smaller if the shape and size of the through hole 24 match the shape and size of the support member 6 . Further, in the present embodiment, since the support member 6 is inserted into the through-hole 24 of the gas duct 23 in the expanded state, the shape of the duct can be stabilized.
- the side cushions 21 and 22 on both sides of the seat 1 behave integrally, and the position and shape of the gas duct 23 when inflated and deployed are stabilized, so that the occupant 1 can be recovered quickly. can be constrained.
- the effect of stabilizing the shape of the gas duct 23 obtained by this embodiment will be visually explained. Assuming that the configuration in which the support members 6 are inserted through the through holes 24 of the gas ducts 23 as in the present embodiment is not adopted, as shown in FIG. In the case of storage, as shown in FIG. 11(b), there is a risk that the gas duct 23 may be bent at the central portion in the longitudinal direction during inflation and deployment.
- the gas duct 23 has the support member 6 inserted through the through-hole 24 , and is sandwiched between the upper end portion of the backrest portion 3 and the lower end portion of the headrest 4 when inflation is completed, thereby extending the width of the seat 1 . Extends straight in one direction. In this embodiment, the shape of the gas duct 23 is stable, and the flow of gas is not hindered.
- the airbag device 10 can restrain the occupant 5 at an early stage because the side cushions 21 and 22 on both sides act integrally.
- a curtain airbag that protects the head of the occupant in a near-side collision a near-side airbag that protects the range from the shoulder to the waist of the occupant in the near-side collision, and , and fur side airbags may be provided to protect the head in the event of a far side collision.
- an airbag device that can cope with automatic driving. In automated driving, it is assumed that the occupant will tilt the backrest of the seat backward to take a comfortable posture, and the occupant will switch the direction of the seat between the front and the rear of the vehicle.
- it is necessary to expand the protection range of each airbag in order to be able to cope with automatic driving which causes problems in terms of cost and design.
- the occupant 5 can be restrained at an early stage. Since the size can be adjusted, the airbag 11 with good design can be constructed. In addition, since the head cushions 31 and 32 are slightly tilted toward the head, the head restraint position is closer to the occupant 5, and restraint performance can be improved. Furthermore, since the first side cushion 21 covers the area from the head to the abdomen of the occupant 5, the curtain airbag can be omitted. This eliminates the need to mount an airbag on the roof of the vehicle, improving the flexibility of the vehicle layout. Moreover, according to this embodiment, it is possible to reduce cost and weight compared to the case where separate side airbags are provided on both sides of the seat 1 .
- the airbag device 10 can be installed on either the front seat or the rear seat of the vehicle, and can also be installed on the seat of a single-seater vehicle. Further, since the airbag device 10 does not depend on the layout of the vehicle, it is possible to modularize part or all of the airbag device 10 so that it can be applied to a plurality of vehicle types.
- the entire airbag 11 can be inflated by one inflator 12, so an increase in the number of parts of the airbag device 10 can be suppressed.
- the airbag 11 when the airbag 11 is fully inflated, the rear portion of the first head cushion portion 31 and the rear portion of the second head cushion portion 32 face each other with the headrest 4 of the seat 1 interposed therebetween. (see FIGS. 1C and 1D).
- the second side cushion 22 rotates about the vertical axis at the rear end thereof and moves toward the outside of the seat 1 .
- the first head cushion portion 31 of the first side cushion 21 is pulled by the second side cushion 22 via the gas duct 23 and collides with the side surface of the headrest 4 . Due to this collision, the airbag 11 receives a reaction force from the headrest 4, so that the swinging of the airbag 11 can be suppressed, and the restraint performance of the occupant 5 by the airbag 11 is improved.
- the seat belt 7 when the seat belt 7 is stretched diagonally downward from the first side cushion 21 side to the second side cushion 22 side, the torso of the occupant 5 seated on the seat 1 is in the inflated state. Then, as shown in FIG. 7, the first side cushion 21 is interposed between the seat belt 7 and the passenger 5. As shown in FIG. The front portion of the first side cushion 21 is received by the seat belt 7 . Therefore, the reaction force from the first side cushion 21 to the occupant 5 acts early, and the occupant 5 can be quickly restrained laterally and forwardly. This effect can be obtained regardless of the installation position of the upper anchor 7a of the seat belt 7 (B-pillar, seat, etc.).
- the first side cushion 21 to which the inflator 12 is attached is provided on the near side of the seat 1 . Also, on the near side, two outlets 18a and 18b of the gas guide 18 open to the upper cushion portion 41a and the lower cushion portion 41b. Therefore, at the time of a near-side collision, the first body cushion portion 41, which takes little time to protect the occupant 5 from the collision, can be inflated and deployed ahead of the other cushion portions.
- the airbag device 10 also includes the following configuration.
- the first side cushion 21 includes a first head cushion portion 31 that inflates and deploys so as to cover one side of the head of the occupant 5, and one side of the torso of the occupant 5.
- the second side cushion 22 has a second head cushion portion 32 that inflates and deploys to cover the other side of the head.
- each of the first side cushion 21 and the second side cushion 22 in the flat state is positioned outside the gas duct 23 in the left-right direction of the airbag 11 and extends forward from the front end of the gas duct 23 . and an inner cushion portion extending inward from a portion of the outer cushion portion extending forward.
- the airbag device 10 when an occupant 5 seated in the seat 1 collides with one of the first side cushion 21 and the second side cushion 22 in the fully inflated state, the other side cushion is pushed through the gas duct 23 into one of the side cushions. It may collide with the side of the headrest 4 of the seat 1 by being pulled by the side cushion.
- the second A side cushion 21 may be interposed between the seat belt and the occupant 5 .
- the widened portion consists of a rear chamber 23a located behind the through hole 24 (upper side in FIG. 8) and a front chamber 23b located in front of the through hole 24 (lower side in FIG. 8).
- the width of the rear chamber 23a in the front-rear direction is longer than the width of the front chamber 23b in the front-rear direction.
- the diameter of the gas duct 23 is increased by providing the widened portions (23a, 23b), the flow rate of the gas flowing from the first side cushion 21 to the second side cushion 22 is increased, and the second side cushion can be inflated and deployed at an early stage.
- the width of the rear chamber 23a is made longer than the width of the front chamber 23b, so that the rear chamber located behind the support member 6 of the headrest 4 in the fully inflated state as shown in FIG.
- the size of 23a can be increased.
- the rear chamber 23a positioned behind the support member 6 in the fully inflated state, can be provided with a function as a cushion for protecting the head of the occupant in the rear seat.
- the length of the gas duct 23 in the completed expansion state is increased by the length of the lateral slit 35 that is slightly increased. Therefore, the movable range of the gas duct 23 positioned between the upper end face of the backrest part 3 and the lower end face of the headrest 4 can be increased, and the airbag 11 can be easily applied to a vehicle having a vertically movable headrest 4.
- the headrest 4 is movable up and down, and as shown in FIG. It becomes easier to accompany the position.
- connection member 23 that connects the first side cushion 21 and the second side cushion 22 may be a member through which gas cannot flow.
- a belt-shaped member using, for example, one sheet of base fabric can be used as the connecting member 23, and the through-holes 24 can be provided in this belt-shaped member.
- a second inflator may be attached to the second side cushion 22, or a bifurcated pipeline may be used so that gas is supplied from one inflator to both side cushions 21 and 22.
- the airbag device 10 may be constructed.
- the through hole 24 may be provided near one end of the connecting member 23 in the width direction.
- the connection member 23 is divided into a gas duct (expansion portion) and a portion (non-expansion portion) through which gas cannot flow. You may make it provide in an expansion part.
- the support member 6 may be integrated with the backrest portion 3 or may be integrated with the headrest 4 .
- the shape of the support member 6 may be a prism, and the number of the support members 6 may be one or three or more. In this case, the shape and number of the through-holes 24 may be appropriately changed according to the shape and number of the support members 6 .
- the mounting member 6 may be a member different from the member that supports the headrest 4 .
- the length of the lateral slit 35 can be adjusted according to the width of the upper end of the seat frame 1a.
- the length of the horizontal slit 35 may be freely adjusted.
- the slits 35 and 36 are notches with almost no gap, but they may be notches with a certain amount of gap.
- the airbag 11 may be configured so that the protection range of the first side cushion 21 extends from the head of the occupant 5 to the waist.
- the airbag 11 may be configured so that the protection range of the second side cushion 22 covers only the head, or the airbag 11 is configured so that the protection range extends to the abdomen or waist. You may Alternatively, the head cushion portions 31 and 32 may be provided on only one of the first side cushion 21 and the second side cushion 22 . Also, when the center console of the vehicle is large, the space in which the second side cushions 22 can be inflated and deployed becomes narrow. good too.
- the present invention can be applied to an airbag device or the like that protects the sides of an occupant.
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Abstract
Description
座席1は、図1A~図1Eに示すように、シートクッション2と、背もたれ部3とを備えている。背もたれ部3の上端部には、棒状の支持部材6を介して、ヘッドレスト4が取り付けられている。支持部材6は、背もたれ部3の上部とヘッドレスト4の下部との間に位置している。支持部材6は、背もたれ部3にヘッドレスト4を取り付ける取付部材に相当する。以下では、座席1用のドアに近い側を「ニアサイド」、座席1用のドアから遠い側を「ファーサイド」と言う場合がある。
エアバッグ装置10は、エアバッグ11と、インフレータ12(図1C参照)とを備えている。エアバッグ11は、布製の袋体である。インフレータ12は、エアバッグ11を膨張させるガスを噴射する装置である。以下では、左右に隣り合う運転席又は助手席の座席1に設けられるエアバッグ装置10を例にして説明を行う。
まず、膨張展開が完了した状態(以下、「膨張完了状態」と言う。)のエアバッグ11について、図1A~図1Eを参照しながら説明を行う。
次に、未膨張のエアバッグ11を広げて平坦面に平置きした状態(以下、「平置き状態」と言う。)におけるエアバッグ11の構成について、図2を参照しながら説明を行う。
次に、ガスダクト23に設ける貫通孔24の形状について、上述の実施形態で示した円形以外の例を、図3A~図3Cを参照しながら説明する。
続いて、座席1にエアバッグ11を収納するための折り方法について図4A及び図4Bを参照しながら説明し、座席1へのエアバッグ11の設置状態について、図5を参照しながら説明を行う。
本実施形態に係るエアバッグ装置10は、例えば側面衝突や横転などによって車両に衝撃が加わると、センサーからの信号を受けたインフレータ12が、第1サイドクッション21内にガスを噴射し、第1サイドクッション21が膨張展開する。また、インフレータ12から第1サイドクッション21に噴射されたガスの一部は、ガスダクト23を通じて第2サイドクッション22に供給される。これにより、第2サイドクッション22が膨張展開する。そして、膨張完了状態では、第1サイドクッション21と第2サイドクッション22とを接続するガスダクト23が、座席1の背もたれ部3の上部とヘッドレスト4の下部との間に位置する。また、第1サイドクッション21と第2サイドクッション22とは、乗員5を挟んで互いに対向する。
以上の説明から理解されるように、エアバッグ装置10は、以下の構成についても含むものである。
本変形例は、エアバッグ11の平置き状態において、図8に示すように、ガスダクト23の延伸方向に交差する方向(図8において上下方向)に幅が拡大している拡幅部(23a,23b)を有している。拡幅部(23a,23b)は、膨張完了状態では、座席の後方に向かって膨張する部分23aを有している。
本変形例は、エアバッグ11の平置き状態において、図10(a)に示すように、上述の実施形態に比べて、横スリット35の切れ込みの長さを、左右方向に長くしたものである。
上述の実施形態において、第1サイドクッション21と第2サイドクッション22とを接続する接続部材23が、ガスが内部を流通不能な部材であってもよい。接続部材23には、例えば1枚の基布を用いた帯状部材を使用し、この帯状部材に貫通孔24を設けることができる。この場合、第2サイドクッション22に第2のインフレータを取り付けてもよいし、二又に分岐する管路を用いて、1つのインフレータから両方のサイドクッション21,22にガスが供給されるようにエアバッグ装置10を構成してもよい。
3 背もたれ部
4 ヘッドレスト
5 乗員
6 支持部材(取付部材)
10 エアバッグ装置
11 エアバッグ
12 インフレータ
16 タブ(固定部)
21 第1サイドクッション
22 第2サイドクッション
23 ガスダクト(接続部材)
23a 後方チャンバー(拡幅部)
23b 前方チャンバー(拡幅部)
24 貫通孔
31 第1頭部用クッション部(内側クッション部)
32 第2頭部用クッション部(内側クッション部)
41 第1胴体用クッション部(外側クッション部)
42 第2胴体用クッション部(外側クッション部)
Claims (13)
- 車両の座席に着座した乗員の一方の側部を覆うように膨張展開する第1サイドクッションと、
前記乗員の他方の側部を覆うように膨張展開する第2サイドクッションと、
前記座席の背もたれ部にヘッドレストを取り付ける取付部材を挿通可能な貫通孔を有すると共に、前記第1サイドクッションと前記第2サイドクッションとを接続する接続部材と、
を有するエアバッグと、
前記エアバッグを膨張させるガスを噴射するインフレータとを備え、
前記エアバッグの膨張展開時には、前記接続部材は、前記貫通孔に前記取付部材が挿通されている、エアバッグ装置。 - 前記取付部材は、前記ヘッドレストを支持する支持部材である、請求項1に記載のエアバッグ装置。
- 前記接続部材は、ガスが内部を流通可能なダクトであり、
前記貫通孔の周囲は、前記ダクトのガス流路から区画されている、請求項1又は2に記載のエアバッグ装置。 - 前記インフレータは、前記第1サイドクッションに取り付けられ、
前記インフレータから前記第1サイドクッションに噴射されたガスの一部が、前記ダクトを通じて前記第2サイドクッションに供給される、請求項3に記載のエアバッグ装置。 - 前記貫通孔の形状及びサイズは、前記取付部材の形状及びサイズに一致している、請求項1乃至4の何れか1つに記載のエアバッグ装置。
- 前記貫通孔は長円形又は楕円形であり、その長円又は楕円の長軸方向が前記接続部材の長手方向となる向きに前記貫通孔が配設されている、請求項1乃至4の何れか1つに記載のエアバッグ装置。
- 前記貫通孔は、スリット状である、請求項1乃至4の何れか1つに記載のエアバッグ装置。
- 前記貫通孔は、前記接続部材の幅方向の中央部に設けられている、請求項1乃至7の何れか1つに記載のエアバッグ装置。
- 未膨張のエアバッグを広げて平坦面に平置きにした平置き状態において、前記ダクトには、前記ダクトの延伸方向に交差する方向に幅が拡大している拡幅部を有しており、前記拡幅部は、膨張完了状態では、座席の後方に向かって膨張する部分を有している、請求項3乃至8の何れか1つに記載のエアバッグ装置。
- 前記拡幅部は、前記平置き状態において、前記貫通孔の後ろ側に位置する後方チャンバーと、前記貫通孔の前側に位置する前方チャンバーとからなり、前記取付部材は前記ヘッドレストを支持する支持部材であり、膨張完了状態では、前記後方チャンバーが、前記支持部材の後方に位置して後部座席の乗員の頭部保護用のクッションとなる、請求項9に記載のエアバッグ装置。
- 前記後方チャンバーの前後方向の幅は、前記前方チャンバーの前後方向の幅よりも長い、請求項10に記載のエアバッグ装置。
- 前記エアバッグでは、前記第1サイドクッション及び前記第2サイドクッションの一方に前記座席への固定部が設けられ、他方に前記インフレータの収納部が設けられ、
前記エアバッグは、前記固定部と前記インフレータの収納部とで、前記座席に固定される、請求項1乃至11の何れか1つに記載のエアバッグ装置。 - 前記接続部材には、前記座席への固定部が設けられていない、請求項12に記載のエアバッグ装置。
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WO2024128054A1 (ja) * | 2022-12-16 | 2024-06-20 | オートリブ ディベロップメント エービー | サイドエアバッグ装置 |
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JPWO2022220082A1 (ja) | 2022-10-20 |
CN117062735A (zh) | 2023-11-14 |
EP4324707A1 (en) | 2024-02-21 |
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