WO2023282019A1 - エアバッグ装置 - Google Patents
エアバッグ装置 Download PDFInfo
- Publication number
- WO2023282019A1 WO2023282019A1 PCT/JP2022/024232 JP2022024232W WO2023282019A1 WO 2023282019 A1 WO2023282019 A1 WO 2023282019A1 JP 2022024232 W JP2022024232 W JP 2022024232W WO 2023282019 A1 WO2023282019 A1 WO 2023282019A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- occupant
- head
- airbag
- airbag device
- Prior art date
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Images
Classifications
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- 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
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
-
- 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
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
-
- 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
- B60R21/237—Inflatable members characterised by the way they are folded
-
- 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
- B60R21/239—Inflatable members characterised by their venting means
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23308—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other the individual compartments defining the external shape of the bag
-
- 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
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
- B60R2021/23316—Inner seams, e.g. creating separate compartments or used as tethering means
Definitions
- the present invention relates to an airbag device mounted on a vehicle seat.
- the present invention relates to an airbag device capable of appropriately protecting the head of an occupant.
- Airbag devices include, for example, a so-called driver airbag device that deploys from near the center of the steering wheel to protect the driver, and a device that deploys downward inside the window to prevent lateral impacts, overturns, and rollovers of the vehicle.
- a curtain airbag device that sometimes protects the occupant
- a side airbag device that deploys on the side of the occupant (side of the seat) to protect the occupant in the event of a lateral impact of the vehicle.
- the side airbag device restrains the lateral movement of the occupant by deploying the airbag forward from the side of the seat.
- the head can be protected.
- the deployed airbag can restrain one side of the occupant's head (one of the left and right sides), but the front or opposite side of the head is restrained. It is virtually impossible to protect.
- the present invention has been made in view of the above circumstances, and provides an epoch-making airbag device capable of protecting the occupant's head from one side to the front and further to the other side. intended to
- an airbag device provides an airbag having a head protection cushion that protects the head of an occupant by deploying from the upper portion of one of the left and right sides of a vehicle seat; an inflator that supplies inflation gas to;
- the head protection cushion includes a first chamber that protects the vicinity of one side of the occupant's head; a second chamber that connects to the first chamber and protects the front of the occupant's head; a second chamber that connects to the second chamber; A third chamber that extends from the front of the occupant's head to the other side; and a fourth chamber that is connected to the third chamber and extends near the other side of the occupant's head.
- the third chamber and the fourth chamber communicate with each other through a first vent hole, and are connected to each other by sewing around the first vent hole. Then, in the housed state of the head protection cushion, the fourth chamber is tucked into the third chamber through the first vent hole.
- tucking in means, in a broad sense, folding inward. In the present invention, it can be interpreted as a form of folding, pushing, or stuffing into another chamber connected from the vent hole. can include morphology.
- the airbag surrounds the occupant's head on one side, the front, and the other side, the occupant's head is reliably restrained regardless of the position of the seat, the reclining angle, or the like. It becomes possible to In addition, when deploying the airbag, there is no need to use the steering wheel, instrument panel, etc. as a reaction force surface, and independent and stable performance can be exhibited independently of the position of the seat.
- the fourth chamber on the tip side (downstream side) is tucked into the interior of the adjacent third chamber, the expansion of the fourth chamber is slower than the first to third chambers. . Therefore, the fourth chamber at the tip (most downstream side) is deployed immediately after passing in front of the occupant's head, and the fourth chamber can be deployed without interfering with the occupant's head.
- the second chamber and the third chamber communicate with each other through a second vent hole, and are connected to each other by sewing around the second vent hole. , the third chamber can be tucked into the interior of the second chamber through the second vent hole.
- the first chamber to the fourth chamber are arranged from the upstream side (one side of the occupant's head) to the downstream side. It is possible to deploy stepwise instead of deploying all at once toward (the other side of the occupant's head).
- the outer peripheral portion of the third chamber can be tucked in toward the center of the chamber.
- a tether that regulates the expanded shape of the chamber can be provided inside the third chamber, and the outer peripheral portion of the third chamber can be tucked in toward the tether.
- the first chamber and the second chamber can be integrally formed by sticking together two base fabrics.
- the third chamber is formed by bonding at least two base fabrics, and among the base fabrics forming the second chamber, the vicinity of the end of the inner panel facing the occupant and the third chamber are formed.
- the forming backing may be joined near the occupant facing edge of the inner panel.
- the fourth chamber can be formed by folding one base fabric or by pasting two base fabrics together.
- the airbag may further include a side protection chamber connected to the vicinity of the lower end of the first chamber and protecting the side of the occupant's body.
- the inflator is positioned within the protective side chamber and configured to flow inflation gas from the protective side chamber to the first chamber, the second chamber, the third chamber, and the fourth chamber. be able to.
- the first chamber can include an upper portion that first expands upward, and a forward portion that is connected to the upper portion and expands forward.
- the first chamber, the second chamber, the third chamber, and the fourth chamber, which constitute the head protection cushion, are integrally folded in the vertical direction when the airbag is put into the accommodated state, and the vehicle is further folded. It can be rolled or bellows-folded backwards from the tip corresponding to the front.
- the "vertical direction” can be regarded as a direction orthogonal to the longitudinal direction of the head protection cushion.
- the "front end corresponding to the front of the vehicle” corresponds to the front end of the fourth chamber when the head protection cushion is fully deployed.
- the tip of the third chamber or the tip of the second chamber corresponds to the tip.
- the vehicle seat according to the present invention can be provided with a side airbag device that protects the sides of the occupant on the side opposite to the side on which the airbag device is accommodated.
- FIG. 1 is a perspective view mainly showing an external shape of a vehicle seat to which an airbag device according to the present invention can be applied.
- FIG. 2 is a perspective view showing an internal structure (seat frame) functioning as a frame of the vehicle seat shown in FIG. 1, and the illustration of the airbag device is omitted.
- FIG. 3 is a schematic side view of a vehicle seat on which an airbag device according to an embodiment of the present invention is mounted, and shows a state in which the airbag device is accommodated as seen through from the outside in the vehicle width direction.
- FIG. 4 is a top view schematically showing how the airbag is deployed in the airbag device according to the embodiment of the present invention.
- FIG. 5 is a top perspective view (bird's-eye view) showing how the airbag is deployed in the airbag device according to the embodiment of the present invention.
- FIG. 6 is a front perspective view showing how the airbag is deployed in the airbag device according to the embodiment of the present invention.
- FIG. 7 is a plan view showing the shape of the panel that constitutes the airbag used in the airbag device according to the embodiment of the present invention, and forms the first and second chambers.
- FIG. 8 is a plan view showing the shape of the panel that constitutes the airbag used in the airbag device according to the embodiment of the present invention, and forms the side chamber.
- FIG. 9 is a plan view showing the shape of the panel that constitutes the airbag used in the airbag device according to the embodiment of the present invention, which forms the third chamber.
- FIG. 10 is a plan view showing the shape of the panel that constitutes the airbag used in the airbag device according to the embodiment of the present invention, and forms the fourth chamber.
- FIG. 11 is a plan view for explaining the connection of the panels shown in FIGS. 7 to 10.
- FIG. 12 is a plan view showing a state in which the panels shown in FIGS. 7 to 10 are connected.
- FIG. 13 is a plan view showing part of the compression process of the airbag according to the embodiment of the present invention. , illustration is omitted.
- 14A and 14B are plan views (A) and (B) and a cross-sectional view (C) showing a part of the compression process of the airbag according to the embodiment of the present invention. Only the chamber is shown, and illustration of other chambers (FIG.
- 15A and 15B are plan views (A) and (B) and a cross-sectional view (C) showing a part of the compression process of the airbag according to the embodiment of the present invention. ) are omitted from the illustration.
- 16A and 16B are plan views (A) and (B) and a cross-sectional view (C) showing part of an airbag compression process according to another embodiment of the present invention. 12) is omitted from illustration.
- the airbag device when the occupant is seated on the seat in a normal posture, the direction in which the occupant is facing is called “forward”, and the opposite direction is called “rear”. Direction.” Also, when the occupant is seated on the seat in a normal posture, the right side of the occupant is called the “right direction” and the left side of the occupant is called the “left direction”. Also, when the occupant is seated on the seat in a normal posture, the direction of the occupant's head is called “upward”, the direction of the occupant's waist is called “downward”, and the axis of coordinates is called “vertical direction”. In the deployed airbag, the side facing the occupant (head) is defined as the inside, and the opposite side is defined as the outside.
- FIG. 1 is a perspective view mainly showing the external shape of a vehicle seat used in the passenger protection system according to the present invention.
- FIG. 2 is a perspective view showing an internal structure (seat frame) that functions as a frame of the vehicle seat shown in FIG. 1, and the illustration of the airbag device (20) is omitted here.
- a vehicle seat to which the present invention can be applied includes, as shown in FIGS. and a headrest 3 connected to the upper end.
- the airbag device 20 As shown in FIG. 1, the airbag device 20 according to this embodiment is accommodated in the side support portion (far side) of the vehicle seat.
- Reference numeral 21 denotes a housing that accommodates a part of the airbags (head protection cushions 32, 34, 36, 38) that constitute the airbag device 20. Fixed. The housing 21 is torn apart at the front or diagonally forward when the airbag device 20 is activated and the airbag 30 is deployed.
- the head protection cushions (32, 34, 36, 38) can be housed inside the seatback 1 in the vicinity of the upper end, in addition to being housed in the housing 21 configured as a separate body.
- the head protection cushions in the case of a vehicle seat in which the headrest 3 is integrated with the seat back 1, it is possible to flexibly set the accommodation space for the head protection cushion.
- a seatback frame 1f that forms the framework of the seat is provided inside the seatback 1, and a pad made of urethane foam or the like is provided on the surface and surroundings of the seatback frame 1f. It is covered with an epidermis such as leather or fabric.
- a seating frame 2f is arranged on the bottom side of the seat cushion 2, and a pad made of urethane foam material or the like is provided on the upper surface and the periphery thereof, and the surface of the pad is covered with a skin such as leather or fabric.
- the seat frame 2 f and the seat back frame 1 f are connected via a reclining mechanism 4 .
- the seatback frame 1f connects a seat frame 10 that is spaced apart from the left and right and extends vertically, an upper frame that connects the upper end of the seat frame 10, and a lower end. It is configured in a frame shape with the lower frame.
- a headrest 3 is configured by providing a cushion member outside the headrest frame.
- FIG. 3 is a schematic side view of the occupant protection system according to the present invention, showing a state in which the airbag device 20 is housed on the side (far side) of the vehicle seat farther from the door, as viewed from the outside in the vehicle width direction. indicates
- the airbag device 20 is housed in the vicinity of the right upper end of the seat back 1 of the vehicle seat.
- the airbag 30 includes head protection cushions (32, 34, 36, 38) that protect the head of the occupant, and a side chamber 40 that protects the sides of the torso of the occupant.
- the airbag device 20 is arranged on the so-called far side, but it can also be arranged on the near side.
- FIG. 4 is a top view schematically showing how the airbag (30) deploys in the airbag device 20 according to the embodiment of the present invention.
- FIG. 5 is a top perspective view (bird's-eye view) showing how the airbag (30) is deployed.
- FIG. 6 is a front perspective view showing how the airbag (30) is deployed.
- a broken line shall show a sewing line.
- the airbag device 20 includes an inflator 160 (see FIGS. 6 and 8) that generates inflation gas; It has
- the airbag 30 includes head protection cushions (32, 34, 36, 38) that protect the area around the head of the occupant P by deploying from near the right upper end of the vehicle seat, and side cushions (32, 34, 36, 38) that protect the sides of the torso of the occupant. chamber 40.
- the head protection cushion includes a first chamber 32 that protects the right side of the head of the occupant P; a second chamber 34 that connects to the first chamber 32 and protects the front of the head of the occupant P; A third chamber 36 that is connected and expands from the front of the occupant's P head to the left side; and a fourth chamber 38 that is connected to the third chamber 36 and is expanded to the left side of the occupant's P head.
- the airbag device 20 further includes a tether 200 that extends in the deployment direction (forward) of the airbag 30 and regulates the deployment shape of the airbag 30; and a holding member 202 that holds along. Details of tether 200 and retaining member 202 will be described later with reference to FIG.
- the tether 200 has a first end 201a connected to the inner surface of the second chamber 34 and a second end 201b opposite the first end 201a. And the second end 201b is connected to the seat frame.
- the second end 201b (rear end) of the tether 200 can be connected to a structure other than the seat frame, or can be directly connected near the rear end of the first chamber 32.
- the first chamber 32 and the second chamber 34 are integrally molded as one chamber.
- the vicinity of the rear of the second chamber 34 is bent in a direction approaching the head of the occupant P, so that the second chamber 34 can be reliably deployed in front of the head of the occupant.
- a tether 200 is connected so as to bridge the first chamber 32 and the second chamber 34, and the second chamber 34 can be bent by the tension of the tether 200 when the airbag 30 is deployed.
- One end of the tether 200 is connected to the inner surface of the second chamber 34, and the other end can be connected to the surface of the first chamber 32 or another member such as a seat frame.
- a side chamber 40 is connected below the first chamber 32.
- the side chamber 40 restrains at least the vicinity of the right shoulder of the occupant P, but may be configured to restrain the waist as well.
- the side chamber 40 and the first chamber 32 are deployed at the same time or whichever is earlier.
- inflation gas is emitted from an inflator 160 housed within the side chamber 40 and is directed into the first chamber and/or the side chamber 40, followed by the second chamber 34 and the third chamber. The flow is arranged in order of the chamber 36 and the fourth chamber 38 .
- four chambers (32, 34, 36, 38) are deployed to surround the occupant P from near the right side of the head to near the left side of the head.
- the second chamber 34 bends from the first chamber 32 toward the occupant (inward), and at the same time, as shown in FIG. It is designed to protect the front including the diagonal front. Since the airbag 30 (at least the first chamber 32 and the fourth chamber 38) is positioned above the shoulders of the occupant P, it is possible to prevent the shoulders of the occupant P from interfering with each other and deteriorating the deployment behavior. Moreover, since the airbag 30 is placed on the shoulders of the occupant P, the distance between the airbag 30 and the head of the occupant P can be reduced, and the head of the occupant can be quickly restrained.
- the longitudinal direction of the second chamber 34 extends from the bending region 200a with respect to the longitudinal direction of the first chamber 32, which is long in the longitudinal direction. It is provided so as to extend forward of the occupant P at an angle. Further, the direction of expansion and deployment of the third chamber 36 from the gas introduction port of the third chamber 36 near the end of the second chamber 34 toward the gas introduction port of the fourth chamber 38 is the longitudinal direction of the first chamber 32. , and is provided at an angle from the terminal end of the second chamber 34 to the longitudinal direction of the inflated and deployed second chamber 34 in a direction approaching the occupant P. .
- the direction in which the fourth chamber 38 inflates and deploys from the gas inlet of the fourth chamber 38 near the end of the third chamber 36 is generally opposite in the longitudinal direction to the longitudinal inflation and deployment direction of the first chamber 32. , and is provided at an angle in a direction from the terminal end of the third chamber 36 toward the occupant side P with respect to the inflation and deployment direction of the third chamber 36 .
- the airbag 30 inflates and deploys from one shoulder of the occupant P so as to wrap around the head of the occupant P. As shown in FIG.
- FIG. 7 is a plan view showing a panel (base fabric) forming the first chamber 32 and the second chamber 34.
- the first chamber 32 and the second chamber 34 are integrally formed by bonding two sheets of base cloth 130a (inner panel) and 130b (outer panel).
- reference numeral 132 denotes a region corresponding to the first chamber 32
- 134 denotes a region corresponding to the second chamber.
- the inner panel 130a faces the occupant P side when the first chamber 32 and the second chamber 34 are deployed.
- the first chamber 32 (region 132 ) has an opening 154 connected with the side chamber 40 and a tab 152 connected with the tab 164 of the side chamber 40 .
- Inflation gas flows into the first chamber 32 from the vicinity of the rear end of the side chamber 40 through the opening 154 .
- a vent opening 150a in fluid communication with the third chamber 36 is formed near the end of the inner panel of the second chamber 34 and extends in a direction along the lower edge of the second chamber to allow the inner panel of the third chamber 36 to extend. Together with the vent opening 150b of 136a (see FIG. 9), it is connected by sewing around it.
- a vent hole 37 is formed by the vent openings 150a and 150b.
- the first chamber 32 roughly includes an upper direction portion 132a that guides upward the gas that has flowed in from the opening 154, and a forward direction portion 132b that is connected to the upper direction portion 132a and expands forward. It is in addition, in FIG. 7, dashed lines other than the upper portion 132a and the front portion 132b indicate sewing lines.
- the inflation gas first flows into the upper direction portion 132a, so that the first chamber 32 can be quickly and reliably lifted above the shoulders of the occupant P, thereby preventing interference with the occupant's head. can be avoided.
- FIG. 8 is a plan view showing a panel (base fabric) that forms the side chamber 40.
- the side chamber 40 is formed by bonding two base fabrics 140a (inner panel) and 140b (outer panel).
- reference numeral 166 denotes an opening connected to the opening 154a of the first chamber 32
- reference numeral 162 denotes an inflator holding portion that accommodates the inflator 160.
- reference numeral 164 is a tab connected to the tab 152 of the first chamber 32 .
- the side chamber 40 and the first chamber 32 are directly connected at their respective openings 154a and 166, and by connecting the tabs 152 and 164 to each other, the deployment posture can be controlled.
- broken lines other than the inflator 160 indicate sewing lines.
- This connection tab 164 is provided on the upper edge of the side protection cushion 40 .
- the tab 152 of the first chamber 32 is provided at the lower edge of the first chamber.
- FIG. 9 is a plan view showing a panel (base fabric) forming the third chamber 36.
- FIG. 9 the broken lines around the perimeter and the broken lines around the openings 150b and 170a indicate sewing lines.
- the third chamber 36 is formed by bonding two base fabrics 136a (inner panel) and 136b (outer panel).
- a vent opening 150b connected to the vent opening 150a of the second chamber 34 is formed near one end of the inner panel 136a.
- a vent opening 170a connected to the vent opening 170b of the fourth chamber 38 is also formed near the other end of the inner panel 136a.
- a vent hole 39 (FIGS. 7 and 9) is formed by the vent openings 170a and 170b.
- the vent hole opening 150b is longer in the lateral direction than the vent opening 170a and has a larger opening area.
- two internal tethers 137a and 137b extending substantially parallel along the direction of gas flow are provided near the center. These internal tethers 137a and 137b connect the inner panel 136a and the outer panel 136b and regulate the expanded thickness of the third chamber 36 (in the direction perpendicular to the plane of the paper). In place of the tether, the inner panel 136a and the outer panel 136b can be connected by simple sewing, thereby restricting the expansion thickness of the third chamber 36.
- FIG. 10 is a plan view showing a panel (base fabric) 138 forming the fourth chamber 38.
- FIG. 10 dashed lines indicate sewing lines.
- the fourth chamber 38 is shaped like a bag by folding one panel 138 in half from the central portion.
- a vent hole 170b connected to the vent hole 170a of the third chamber is formed in the vicinity of the longitudinal center of the panel 138, and the longitudinal centerline of the vent hole 170b serves as the fold line of the panel 138.
- FIG. 11 is a plan view for explaining the connection of the panels shown in FIGS. 7 to 10.
- FIG. 12 is a plan view showing a state in which the panels shown in FIGS. 7 to 10 are connected.
- the chamber obtained by integrating the first chamber 32 and the second chamber 34 has the largest capacity, followed by the side chamber 40 having the largest capacity.
- the capacity of the third chamber 36 is designed to be small, and the capacity of the fourth chamber 38 is designed to be even smaller.
- the second chamber 34 and the third chamber 36 are connected by sewing only around the vent openings 150a and 150b. Also, the third chamber 36 and the fourth chamber 38 are connected by sewing only around the vent openings 170a and 170b.
- FIG. 13 is a plan view showing part of the compression process of the airbag 30 according to the embodiment of the present invention. Chamber 36, fourth chamber 38, side chamber 40) are not shown. In practice, the compression step is performed after all the chambers have been sewn together as shown in FIG.
- the tether 200 is pulled backward (pulled together) to form a wrinkled region 210 around the tether 200 in the first chamber 32 and the second chamber 34 (FIG. 13). (B)). Thereafter, the upper portion of the wrinkled region 210 is compressed toward the center (downward) by a method such as bellows folding.
- a method such as bellows folding.
- the "wrinkles" of the wrinkle region 210 may adopt a form of casually shrinking (shrinking), or a somewhat regular folding form such as bellows folding.
- FIGS. 14A and 14B are plan views (A) and (B) and a cross-sectional view (C) showing a part of the airbag compression process according to the embodiment of the present invention. Only four chambers 38 are shown, and illustration of the other chambers is omitted.
- the fourth chamber 38 connected to the third chamber 36 is tucked into the third chamber 36 through the vent hole 39 .
- "tuck-in” broadly means to fold inward. In this embodiment, it is as if the fourth chamber 38 is put inside the vent hole 39 while being turned upside down. At this time, since internal tethers 137a and 137b are provided inside the third chamber 36, the fourth chamber 38 is actually inserted between these internal tethers 137a and 137b ( Figure 15).
- the fourth chamber 38 on the tip side (downstream side) is tucked into the interior of the adjacent third chamber 36, compared to the first to third chambers (32, 34, 36), the , the deployment of the fourth chamber 38 slows down. Therefore, the fourth chamber 38 at the tip (most downstream side) is deployed immediately after passing in front of the occupant's head, and the fourth chamber 38 can be deployed without interfering with the occupant's head. , can be deployed so as to wrap around the head of the occupant P. be.
- FIG. 15A and 15B are plan views (A) and (B) and a cross-sectional view (C) showing a part of the airbag compression process according to the embodiment of the present invention.
- the first chamber 32 is , illustration is omitted.
- FIG. 15(A) shows the fourth chamber 38 already tucked inside the third chamber 36 .
- the second chamber 34 actually has a wrinkled area 210 as shown in FIG. 13B, it is shown in a flat state for the sake of convenience.
- edges 37b of the third chamber 36 facing each other in the front-rear direction are folded toward the center along the folding lines 37a. tuck in.
- internal tethers 137a and 137b are provided inside the third chamber 36, so that the edge 37b can be folded up to a position reaching the internal tethers 137a and 137b.
- FIG. 16A and 16B are plan views (A) and (B) and a cross-sectional view (C) showing part of an airbag compression process according to another embodiment of the present invention. 12) is omitted from illustration.
- the state shown in FIG. 16(A) is the same as the state shown in FIG. 15(A). 15(A) and (B), the second chamber 34 is actually formed with a wrinkled region 210 as shown in FIG. 13(B). For convenience, it is shown in a flat state.
- the third chamber 36 with the fourth chamber 38 tucked in (accommodated) is further tucked into the second chamber 34 through the vent hole 37. It is.
- the whole head protection cushion (32, 34, 36, 38) is folded vertically, It is rolled or bellows-folded toward the (first chamber 32) side.
- the "vertical direction” is generally the vertical direction on the plane of the paper, or the direction orthogonal to the line L0 with the first chamber 32 side inclined slightly higher. can be Alternatively, it can be expressed as a direction orthogonal to the longitudinal direction of the head protection cushion.
- "from the tip side (downstream side) to the upstream side” is a direction from left to right along the line L0, and can be regarded as a direction from the tip side to the rear in the longitudinal direction of the head protection cushion. .
- the forward deployment of the second chamber 34 is restricted,
- the tether 200 is bent starting from the bent portion 200a of the tether 200, that is, the bent region 202a of the holding member 202, and is deployed forward of the occupant (FIGS. 4 and 5).
- the second chamber 34 is bent so that the tip side faces upward, and the vent opening 150a is unfolded so as to be substantially vertically long.
- the inflation gas flows from the second chamber 34 into the third chamber 36 through the vent hole 37, and the third chamber 36 deploys from the front of the occupant P to the vicinity of the left head. Since the inner panel 134a of the second chamber 34 and the inner panel 136a of the third chamber 36 are connected around the vent hole 37, the third chamber 36 expands outward (in the direction away from the occupant's head). A curved shape is created to surround the occupant P's head.
- the inflation gas flows from the third chamber 36 into the fourth chamber 38 through the vent hole 39, and the fourth chamber 38 is deployed near the occupant's P left head. Since the inner panel 136a of the third chamber 36 and the fourth chamber 36 are connected around the vent hole 39, the movement of the fourth chamber 36 to expand outward (away from the occupant's head) is restricted. and a curved shape surrounding the head of the occupant P is created.
- the third chamber 36 is deployed later than the first chamber 32 and the second chamber 34. That is, the first chamber 32 to the fourth chamber 38 achieve a deployment behavior in which they are deployed in stages from the upstream side (one side of the occupant's head) to the downstream side (the other side of the occupant's head). can do. As a result, it is possible to prevent the third chamber 36 and the fourth chamber 38 from interfering with and coming into contact with the occupant's head at the initial stage of deployment of the airbag 30 .
- the structure is such that the tether 200 slides along the surface of the airbag 30, the tether 200 does not protrude like a bridge from the surface of the airbag 30, and unnecessary interference with the occupant P can be avoided. can.
- the far-side airbag was mainly described in the examples, but near-side airbags (the side of the vehicle seat farther from the vehicle door), small mobility, etc. It can also be used for single-seat vehicles such as small vehicles (vehicles that include a portion where there is only one seat in a line regardless of whether there is a door) or the like.
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Abstract
Description
図13は、本発明の実施例に係るエアバッグ30の圧縮工程の一部を示す平面図であり、説明の便宜上、第1チャンバ32及び第2チャンバ34のみを示し、他のチャンバ(第3チャンバ36、第4チャンバ38、サイドチャンバ40)については、図示を省略する。実際には、図12に示すように全てのチャンバを縫製によって連結した後に、圧縮工程が行われる。
る。
図4~図6に示すように、本実施例に係るエアバッグ装置20においては、車両の衝突事象が発生すると、インフレータ160が作動し、膨張ガスがサイドチャンバ40の後端部近傍にあるインフレータ保持部162から、第1チャンバ32に流れ込む。第1チャンバ32に膨張ガスが流れ込むと、最初に上部方向部132a(図7)が膨張し、続いて前方方向部132bが膨張する。次に、第1チャンバ32から第2チャンバ34にガスが流れ込む。
Claims (12)
- 車両用シートの左右一方の上部から展開することで乗員の頭部を保護する頭部保護クッションを有するエアバッグと:
前記エアバッグに膨張ガスを供給するインフレータと;を備え、
前記頭部保護クッションが、乗員の一方の側頭部付近を保護する第1チャンバと;前記第1チャンバに繋がり、乗員の頭部前方を保護する第2チャンバと;前記第2チャンバに繋がり、乗員の頭部前方から他方の側部に渡って展開する第3チャンバと;前記第3チャンバと繋がり、乗員の他方の側頭部付近で展開する第4チャンバと;を備え、
前記第3チャンバと前記第4チャンバとは、第1のベントホールによって連通し、当該第1のベントホールの周囲を縫製することによって互いに連結される構造であり、
前記頭部保護クッションの収容状態において、前記第4チャンバは前記第1のベントホールから前記第3チャンバの内部にタックインされた構造を有することを特徴とするエアバッグ装置。 - 前記第2チャンバと前記第3チャンバとは、第2のベントホールによって連通し、当該第2のベントホールの周囲を縫製することによって互いに連結される構造であり、
前記頭部保護クッションの収容状態において、前記第3チャンバは前記第2のベントホールから前記第2チャンバの内部にタックインされた構造を有することを特徴とする請求項1に記載のエアバッグ装置。 - 前記頭部保護クッションの収容状態において、前記第3チャンバの外周部分が当該チャンバの中心に向かってタックインされた構造を有することを特徴とする請求項1に記載のエアバッグ装置。
- 前記第3チャンバの内部には、当該チャンバの展開形状を規制するテザーが設けられており、
前記第3チャンバの外周部分が前記テザーに向かってタックインされた構造を有することを特徴とする請求項3に記載のエアバッグ装置。 - 前記第1チャンバと前記第2チャンバとは、2枚の基布を貼り合わせることにより一体に成形された構造を有することを特徴とする請求項1乃至4の何れか1項に記載のエアバッグ装置。
- 前記第3チャンバは、少なくとも2枚の基布を貼り合わせることにより成形されており、
前記第2チャンバを形成する基布のうち、乗員に面する内側パネルの端部近傍と、前記第3チャンバを形成する基布の乗員に面する内側パネルの端部近傍とが連結された構造を有することを特徴とする請求項5に記載のエアバッグ装置。 - 前記第4チャンバは、1枚の基布を折り畳んで、又は2枚の基布を貼り合わせることによって成形された構造を有することを特徴とする請求項5に記載のエアバッグ装置。
- 前記エアバッグは、前記第1チャンバの下端付近に繋がり、乗員の体側部を保護する側部保護チャンバを更に含むことを特徴とする請求項1乃至4の何れか1項に記載のエアバッグ装置。
- 前記インフレータは、前記側部保護チャンバ内部に配置され、
前記側部保護チャンバから、前記第1チャンバ、前記第2チャンバ、前記第3チャンバ、前記第4チャンバへと膨張ガスが流れるように構成されていることを特徴とする請求項8に記載のエアバッグ装置。 - 前記第1チャンバは、上方に向かって最初に展開する上部方向部と、当該上部方向部に繋がり、前方に向かって展開する前方方向部とを含むことを特徴とする請求項1乃至4の何れか1項に記載のエアバッグ装置。
- 前記エアバッグを収容状態にする際に、前記頭部保護クッションを構成する前記第1チャンバ、前記第2チャンバ、前記第3チャンバ及び前記第4チャンバを一体として、上下方向に折畳まれた構造を有し、車両前方に該当する先端部から後方に向かってロール又は蛇腹折りされた構造を有することを特徴とする請求項1乃至4の何れか1項に記載のエアバッグ装置。
- 請求項1乃至4の何れか1項に記載のエアバッグ装置に加え、
当該エアバッグ装置が収容される側とは反対側に、乗員の側部を保護するサイドエアバッグ装置が設けられていることを特徴とする車両用シート。
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JP2006008105A (ja) * | 2004-05-27 | 2006-01-12 | Toyoda Gosei Co Ltd | サイドエアバッグ装置 |
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JP2019018791A (ja) * | 2017-07-20 | 2019-02-07 | Joyson Safety Systems Japan株式会社 | エアバッグ及び乗員拘束装置 |
JP2019034710A (ja) * | 2017-08-18 | 2019-03-07 | 現代自動車株式会社Hyundai Motor Company | 車両用エアバッグ |
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JP6278006B2 (ja) * | 2015-07-13 | 2018-02-14 | トヨタ自動車株式会社 | 乗員保護装置 |
US9932011B2 (en) * | 2015-12-28 | 2018-04-03 | Toyoda Gosei Co., Ltd. | Side airbag apparatus |
JP6565776B2 (ja) * | 2016-04-13 | 2019-08-28 | トヨタ自動車株式会社 | 乗員保護装置 |
US10710539B2 (en) * | 2018-03-23 | 2020-07-14 | Ford Global Technologies, Llc | Seatback-mounted restraint system |
EP4180278A4 (en) * | 2020-07-07 | 2024-08-14 | Autoliv Dev | AIRBAG DEVICE |
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JP2006008105A (ja) * | 2004-05-27 | 2006-01-12 | Toyoda Gosei Co Ltd | サイドエアバッグ装置 |
US20120013107A1 (en) * | 2010-07-14 | 2012-01-19 | Autoliv Asp, Inc. | Inflatable airbag assemblies with arm-manipulating side airbags |
JP2019018791A (ja) * | 2017-07-20 | 2019-02-07 | Joyson Safety Systems Japan株式会社 | エアバッグ及び乗員拘束装置 |
JP2019034710A (ja) * | 2017-08-18 | 2019-03-07 | 現代自動車株式会社Hyundai Motor Company | 車両用エアバッグ |
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