WO2008035568A1 - Dispositif d'airbag - Google Patents

Dispositif d'airbag Download PDF

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Publication number
WO2008035568A1
WO2008035568A1 PCT/JP2007/067271 JP2007067271W WO2008035568A1 WO 2008035568 A1 WO2008035568 A1 WO 2008035568A1 JP 2007067271 W JP2007067271 W JP 2007067271W WO 2008035568 A1 WO2008035568 A1 WO 2008035568A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
flow path
airbag
airbag device
pressure fluid
Prior art date
Application number
PCT/JP2007/067271
Other languages
English (en)
Japanese (ja)
Inventor
Shinichi Sugimoto
Takeshi Sone
Original Assignee
Takata Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takata Corporation filed Critical Takata Corporation
Publication of WO2008035568A1 publication Critical patent/WO2008035568A1/fr

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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
    • B60R21/20—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
    • B60R21/233—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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • 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
    • B60R2021/0002—Type of accident
    • B60R2021/0018—Roll-over
    • 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
    • B60R2021/003—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks characterised by occupant or pedestian
    • B60R2021/0039—Body parts of the occupant or pedestrian affected by the accident
    • B60R2021/0048—Head
    • 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
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts

Definitions

  • the present invention relates to an airbag device installed in a vehicle such as an automobile.
  • Background art
  • An airbag device for a driver's seat that is inflated and deployed from the center of rotation of the steering wheel to the driver side, and an assistant that is inflated and deployed from the instrument panel to the passenger seat side
  • Various airbag devices are used to restrain the occupant's body in the event of a car crash, such as a seat airbag.
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-37011
  • an airbag composed of a bag body combined with a base fabric is stored in a backrest (or headrest) of a vehicle seat, and pressure fluid from an inflator is supplied to the airbag in an emergency.
  • a backrest or headrest
  • pressure fluid from an inflator is supplied to the airbag in an emergency.
  • An object of the present invention is to provide a technique effective for smoothly circulating a pressure fluid between a plurality of bags at the time of inflating and deploying to improve deployment performance.
  • the first invention of the present application is constituted by a bag body to which a base fabric is bonded.
  • a first bag having a supply flow path for supplying the pressure fluid supplied from the inflator to the inside, a lead-out flow path for leading the pressure fluid supplied to the outside to the outside, and a bag body coupled with the base fabric
  • a second bag comprising an introduction flow path configured to introduce a pressure fluid derived from the discharge flow path of the first bag, and the discharge flow path of the first bag and the second bag.
  • a flow path coupling member that couples the introduction flow paths while maintaining the cross-sectional shape of each flow path, a retainer that stores and holds the first and second bags, one side connected to the retainer, and the other side of the retainer And a protective member provided so as to cover the outer peripheral side of the flow path coupling member.
  • the outer peripheral side of the flow path coupling member that couples the lead-out flow path of the first bag and the introduction flow path of the second bag, the protective member having one side connected to the retainer Therefore, the movement of the flow path coupling member is suppressed when the first and second bags are deployed, and the first and second bags are in contact with the outer periphery of the flow path coupling member. To prevent damage.
  • the pressurized fluid can be smoothly circulated from the first bag to the second bag, and the deployment performance of the entire airbag can be improved.
  • a second invention of the present application is the first invention, wherein the flow path coupling member includes a hollow communication pipe that is passed through both the discharge flow path and the introduction flow path, the discharge flow path, and the An outer periphery tightening member that tightens the introduction channel from the outer periphery and fastens it to the hollow communication pipe, and the protective member is disposed so as to cover the outer periphery side of the outer periphery tightening member.
  • the outlet flow channel which is a tubular flow channel and the flow channel cross-sectional shape of both inner peripheral sides by the hollow connecting pipe without being crushed Can be maintained, and can be fastened with high tightness by the outer peripheral fastening member.
  • a third invention of the present application is characterized in that, in the second invention, the outlet channel is coupled in an arrangement inserted between an outer periphery of the hollow communication pipe and an inner periphery of the introduction channel. To do.
  • the end portion of the outlet channel is accommodated in the inlet channel, and even when the pressure fluid is led out from the outlet channel with high pressure, the outlet channel Outside directly from It is possible to prevent the pressure fluid from leaking to the part.
  • a fourth invention is the invention according to any one of the first to third inventions, wherein the first bag has a pressing and expanding portion that is inflated and deployed by the pressure fluid supplied from the inflator.
  • the deployment unit includes a deployment derivation unit that guides the second bag above the occupant's head, and the second bag is inflated and deployed above the occupant's head by the pressure fluid supplied from the inflator. It has the upper expansion part which carries out.
  • the pressing and deploying portion of the first nodule is inflated, and at the time of the inflation, the second bag is unfolded by the unfolding lead-out portion.
  • the upper deployment portion of the second bag is inflated and deployed to the upper side of the occupant's head, thereby restraining the movement of the occupant's head upward.
  • the pressing and deploying portion of the first bag is inflated and deployed on the side facing the occupant's rear head, and the second bag is inflated and deployed on the side opposite to the occupant. It is characterized by comprising a lower development part arranged so as to overlap with the pressing development part.
  • the posture can be changed so that the occupant's occipital region is bent forward more effectively by the two thicknesses of the pressing expansion portion and the downward expansion portion.
  • the first bag is first supplied with pressure fluid directly from the inflator and begins to inflate and deploy.In the subsequent order, pressure fluid is introduced into the second bag and the upper deploying portion inflates and deploys above the head of the occupant. By starting, it is possible to smoothly inflate and deploy the entire airbag without causing unnatural bends or breaks in the upper deployment portion.
  • FIG. 1 is a schematic side view of an automobile seat 1 provided with an embodiment of an airbag device of the present invention
  • FIG. 1 (a) is when the airbag device is not in operation
  • FIG. It shows when the airbag device is in operation.
  • the seat (seat) 1 includes a seat portion 1A on which an occupant 2 is seated, and a backrest portion 1B that protrudes upward from the seat portion 1A that supports the back of the seated occupant 2.
  • Backrest Headrest 1C is attached to the top of part IB.
  • the seat 1 is provided with an airbag device 10 in the backrest portion 1B for restraining the head 2A of the occupant 2 when the vehicle rolls over due to an accident.
  • the airbag device 10 includes a first bag 35 (see FIGS. 5 and 6 to be described later) obtained by sewing and joining a first base fabric 35A and a second base fabric 35B, and a third base fabric 36A and a fourth base fabric 36B.
  • a second bag 36 (see FIGS. 5 and 7 to be described later) and a flow path coupling member 60 (see FIGS. 4 and 12 to be described later) for connecting the first bag 35 and the second bag 36 to each other.
  • An airbag 11 that is configured to be deployed above the head 2A of the occupant 2 when inflated, a retainer 12 that is stored in a state in which the airbag 11 is folded, and the airbag 11 is inflated and deployed.
  • an inflator 13 (see FIGS. 2 and 3) for supplying gas (pressure fluid) for the purpose.
  • the seat 1 includes a side plate 14A (see FIG. 2), a cross member 14B (see FIG. 2), and the like, and has a seat frame 14 that forms a skeleton of the seat 1 inside.
  • the inflator 13 is provided on the seat frame 14 (details will be described later).
  • an automobile in which the airbag device 1 is mounted has an occurrence (or prediction of occurrence) when the automobile collides (including a side collision) or rolls over.
  • Various sensors are provided to detect).
  • An inflator control circuit (not shown) activates an initiator (not shown) of the inflator 13 based on detection signals from these sensors.
  • the airbag 11 is housed in a folded state in the retainer 12 in a normal state.
  • the sensor detects this, and the inflator control circuit force is also input to the initiator of the inflator 13 to start the initiator, and the initiator is activated as shown in FIG.
  • the airbag 11 is inflated and deployed between the roof 3 of the automobile and the head 2A of the occupant 2 (in the case of an automobile such as an open car without the roof 3, the airbag 11 is 2A above).
  • the airbag 11 causes the head 2A of the occupant 2 to be lifted by inflating and deploying the pressing portion of the first bag 35 (see FIGS.
  • FIG. 2 is a perspective view showing a structure for fixing the airbag device 10 to the seat frame 14, and FIG. 3 is an exploded perspective view of the airbag device 10 showing the fixing structure in more detail.
  • the seat frame 14 includes a pair of side plates 14 A, 14 A provided on both sides in the vehicle width direction (both sides in the left-right direction in FIG. 2) in the backrest portion 1 B of the seat 1.
  • the side plate 14A has a cross member 14B extending between the side plates 14A and 14A so as to be substantially along the vehicle width direction and connecting the side plates 14A and 14A.
  • the side plates 14A, 14A and the cross member 14B are both provided in the backrest portion 1B of the seat 1.
  • the seat frame 14 also has a base plate provided in the seat 1A.
  • the mounting pieces 35b, 35b are respectively provided with two bolt holes 22 through which mounting bolts 21a (see FIG. 3) for fixing the airbag 11 and the retainer 12 are passed.
  • the retainer 12 is provided with mounting portions 12a and 12b each having a bolt hole 24 through which a mounting bolt 23 for fixing the retainer 12 is passed, on both sides in the vehicle width direction.
  • a mounting part 12c At the lower part (the inflator side, the lower side in FIG. 3), there is provided a mounting part 12c in which a bolt hole 25 is similarly drilled at a position corresponding to the bolt hole 22 of the airbag mounting part 35b.
  • a plurality (four in the present embodiment) of the mounting bolts 21a includes a bolt hole 25 formed in the retainer mounting portion 12c in a state in which the airbag 11 is folded and stored in the retainer 12, and an airbag.
  • the bolt hole 22 of the mounting portion 35b and the bolt hole 27 drilled at the position corresponding to the bolt hole 22 of the airbag mounting portion 35b of the mounting plate 26 are respectively passed through and fastened to the nut 21b. Thereby, the airbag 11 is fixed to the retainer 12 in a folded state.
  • a plurality (two in this embodiment) of the mounting bolts 23 are passed through the bolt holes 24 of the retainer mounting portions 12a and 12b and then fastened to fastening holes (not shown) provided in the cross member 14B. .
  • the pipe member 20 is, for example, a metal pipe bent at a plurality of locations (two locations in the present embodiment), and is provided below the retainer 12.
  • the pipe member 20 and the airbag 11 are connected by covering the bag side end portion 20a of the pipe member 20 with the gas supply port 35a of the airbag 11 and caulking and fixing with a metal clamp band 30, for example. Yes.
  • the pipe member 20 and the inflator 13 are connected by connecting (or welding, etc.) the connecting portion 20b provided on the inflator side end portion of the pipe member 20 to the upper end portion 13a of the inflator 13. Has been. In this way, the airbag 11 and the inflator 13 are connected via the pipe member 20! /.
  • the inflator 13 is provided further below the pipe member 20, and is attached to the side plate 14A on one side (the left side in the vehicle width direction in the present embodiment) by an attachment member 31.
  • the mounting member 31 includes a pair of mounting plates 31A and 31B that sandwich and support the inflator 13, and there are a plurality of mounting plates 31A and 31B (four in this embodiment) formed on the mounting plate 31A.
  • the rivets 31a are fixed through the inflator 13 by being threaded through and connected to a plurality of (four in this embodiment) rivet holes 31b drilled at corresponding positions on the mounting plate 31B.
  • the one end (left side in the vehicle width direction) of the mounting plate 31A is provided with a mounting portion 31c formed by being bent approximately 90 degrees, and a plurality of (two in this embodiment) mounting bolts (in this embodiment) (Not shown) are passed through the bolt holes 33 drilled in the mounting portion 31c and fastened to fastening holes (not shown) provided in the side plate 14A, so that the mounting member 31 is attached to the side plate 14A. It is supposed to be fixed. As a result, the inflator 13 is fixed to the side plate 14A via the attachment member 31.
  • inflator 13 and the above-described control unit are connected by a cable 34, and ignition control of the inflator 13 is performed via the cable 34.
  • FIG. 4 is a perspective view showing the entire structure of the airbag 11 in a fully inflated and deployed state.
  • the airbag 11 has a pressing deployment portion 37 and a supporting deployment portion 38.
  • pressurized fluid is supplied from the inflator 13 so that the pressing deployment portion 37 faces the occupant's rear head.
  • a first bag 35 that is inflated and deployed on the side to be operated, an upper deployment portion 39, and a lower deployment portion 50, and is supplied with pressure fluid through the first bag 35 so that the upper deployment portion 39 is occupant.
  • a second bag 36 inflating and deploying above the head of the vehicle and inflating and deploying the lower deployment portion 50 on the opposite side of the occupant with the pressing deployment portion 37, and the interior of the first bag 35 and the second bag 36.
  • a flow path coupling member 60 coupled so as to be communicable. Two outlet channels 35t formed in the first bag 35 with tubular channels and two inlet channels 36i formed in the second bag 36 with tubular channels are highly sealed by the channel coupling member 60. (See Figure 11 and Figure 12).
  • the gas supply port 35a described above is provided in the lower portion of the first bag 35, and the gas ejected from the inflator 13 shown in FIG. 2 is the pipe member 20 and the gas supply port 35a. Then, it is supplied to the pressing and unfolding portion 37 and the supporting and unfolding portion 38 in the first bag 35. And it is located on both sides of the lower part of the second bag 36 from the two outlet channels 35t (see FIGS. 5, 6, and 12) located on both sides of the gas supply port 35a at the lower part of the first bag 35, respectively.
  • the pressure fluid flows into the two introduction flow paths 36i (see FIGS. 7 and 12), and is supplied to the upper expanding portion 39 and the lower expanding portion 50.
  • each of the first bag 35 and the second bag 36 includes a base fabric on the occupant 2 side (vehicle front side) and a base fabric on the side opposite to the occupant 2 (vehicle rear side).
  • Two independent bags 35 and 36 that are sewn together are configured as an airbag 11 by connecting the respective flow paths.
  • FIG. 5 shows a second base fabric 35 B representing the entire structure of the first bag 35 and the second bag 36 that are sewn and joined to each other before being expanded and deployed (before being folded for storage).
  • FIG. 6 is a plan view seen from the side (ie, the second bag 36 located on the upper surface side from the first bag 35 side)
  • FIG. 7 is a plan view seen from the cloth 35B side (that is, the lower surface side of the first bag 35)
  • FIG. 7 shows the overall structure of the second bag 36 in a state before being expanded and deployed (a state before being folded for storage).
  • FIG. 8 is a developed view of the connection panel
  • FIG. 9 is a sectional view taken along line AA in FIG. 5
  • FIG. 10 is a sectional view taken along line BB in FIG.
  • the first bag 35 includes a first base fabric 35A and a second base fabric 35B having substantially the same shape, excluding the gas supply port 35a and the outlet channel 35t. All the circumferences are sewn together It is formed as one bag body.
  • reference numeral 40 denotes the sewing joint portion
  • reference numeral 41 denotes a sealing material portion made of an appropriate sealing material provided along the sewing joint portion 40 for sealing the sewing joint portion 40.
  • the second base fabric 35B includes a substantially trapezoidal press-deployed portion 37 that expands from the gas supply port 35a side (lower side in FIG. 6) toward the opposite side (upper side in FIG. 6),
  • the pressing and unfolding portion 37 has a pair of supporting and unfolding portions 38 provided above the left and right sides in the drawing.
  • the first base fabric 35A has substantially the same shape as the second base fabric 35B.
  • the first base fabric 35A, the second base fabric 35B and the force S having such a shape are sewn and joined over the entire circumference excluding the gas supply port 35a and the two outlet passages 35t as described above.
  • a press development part 37 Between the first base fabric 35A and the second base fabric 35B, there are formed a press development part 37, a pair of support development parts 38 arranged on the left and right sides of the press development part 37, and a lead-out flow path 35t.
  • the pressing and unfolding portion 37, the supporting and unfolding portion 38, and the lead-out flow path 35t 1S are arranged so that their outer edge portions are enveloped by the sewing joint portion 40 and the sealing material portion 41 as a whole.
  • the pressing and expanding portion 37 is provided at a substantially central portion thereof so as to be substantially along the gas inflow direction and on both sides (left and right sides in Fig. 6) of the sewing connecting portion 40a.
  • the gas supplied from the gas supply port 35a can be smoothly introduced to the downstream side (upper side in FIG. 6) of the pressing and expanding portion 37 and smoothly introduced.
  • substantially triangular deployment lead-out portions 90, 90 are provided on the left and right sides of the first bag 35, respectively.
  • the first bag 35 having the above-described configuration is first sewn with the first base fabric 35A and the second base fabric 35B overlapped along the sewing joint portion 40 in a state where the first base fabric 35A and the second base fabric 35B are overlapped. It is formed by sewing along the sewing joint portions 40a, 40b, 40c, etc. of the pressing force developing portion 37. At this time, non-expandable portions L and R whose outer circumferences are sewn in a circular shape by the sewn joint portions SL and SR are formed at the ends of the sewn joint portions 40b and 40c.
  • the support development portions 38 on both sides are bent with respect to the first bag 35 so as to sandwich the left and right sides of the head of the occupant 2, and the state is maintained and inflated and deployed.
  • the above-mentioned provided on the left and right sides of the first bag 35 The unfolding portions 90 and 90 are joined to the to-be-derived portions 91 and 91 (see FIG. 7 described later) provided on both sides of the upper unfolding portion 39 of the second bag 36 by sewing.
  • the second bag 36 includes a third base cloth 36A and a fourth base cloth having substantially the same shape.
  • the fourth base fabric 36B has a substantially rectangular shape extending from the introduction flow path 36i side (lower side in FIG. 7) toward the opposite side (upper side in FIG. 7). It has a middle and upper upper development part 39 and a lower development part 50 in the lower part of the figure.
  • the third base fabric 36A has almost the same shape as this fourth base fabric 36B! As described above, the third base cloth 36A and the fourth base cloth 36B are sewn and joined over the entire circumference except for the two introduction flow paths 36i, as described above. Between the four base fabrics 36B, an upper developed part 39 in the upper half in the figure, a lower developed part 50 in the lower half in the figure, and two introduction flow paths 36i are formed. As a result, the upper development part 39, the lower development part 50, and the introduction flow path 36i are arranged so that the outer edge part is enveloped by the sewing joint part 40 and the sealing material part 41 as a whole.
  • the upper portions of the upper development portion 39 and the lower development portion 50 are two sewn joint portions 40d provided so as to be approximately along the gas inflow direction in an arrangement in which the width direction is equally divided into three. , 40ei and has three upper and lower development chambers 39a, 39b, 39c. As a result, the gas introduced from the introduction flow path 36i can be smoothly introduced to the downstream side (upper side in FIG. 7) of the upper development portions 39a, 39b, 39c.
  • a circular non-expandable portion C is disposed at a substantially central portion of the lower development portion 50.
  • the non-expandable portion C is circularly joined and sealed by a sewing joint SC at the periphery, and sealed. A pair of mounting holes are formed in the center.
  • the second bag 36 having the above-described configuration is first sewn at the outer edge portion along the sewing joint portion 40 in a state where the third base fabric 36A and the fourth base fabric 36B are overlapped, and the above-described sewing joint. Sew along the portions 40d, 40e, etc., and then bend forward so that the upper deployment portions 39a, 39b, 39c are deployed above the head of the occupant 2 with respect to the first bag 35 as shown in FIG.
  • the to-be-derived portions 91 and 91 on both sides of the above-described upper deploying portion 39 are joined to the first bag 35 (see FIGS. 5 to 7) with the unfolding portions 90 and 90 of the supporting and deploying portion 38 on both sides by sewing.
  • the first bag 35 and the second bag 36 overlap with each other in the pressing deployment portion 37 and the lower deployment portion 50. Further, in the overlapping portion of the press development part 37 and the lower development part 50, three sewing joint parts 40a, 40b, 40c of the press development part 37 and two sewing joint parts 40d of the lower development part 50 are provided. 40e are formed so as to be displaced from each other. As a result, the four press deployment chambers 37a, 37b, 37c, and 37d and the upper and lower deployment chambers 39a, 39b, and 39c that are respectively formed are also inflated and deployed in an arrangement shifted from each other.
  • the pressing and unfolding portion 37 of the first bag 35 and the lower unfolding portion 50 of the second bag 36 are sewn and connected via a connection panel PN (see FIG. 8 described later). .
  • connection panel PN has the first and second bags 35 and 36 deployed when the pressing and unfolding portions 37 and 50 of the first bag 35 and the second bag 36 are inflated and deployed.
  • the shape of both sides is the same as the outer shape of the first bag 35 and the second bag 36, and the first and second bags 35, As with 36, four mounting pieces PNa, PNa, PNb, and PNb are projected, and a recess Q is formed in the lower center.
  • the attachment pieces PNa, PNa, PNb, and PNb are attached together with attachment pieces formed on both sides of the corresponding first bag 35 and second bag 36.
  • the upper side of the connection panel PN has three sewing joints 40b, 40c that define four pressing development chambers 37a, 37b and 37c, 37d of the first bag 35.
  • two sewing joint portions 40b, 40c arranged on both sides thereof, a sewing joint portion 40 for joining both sides of the second bag 36 together with the sealant 41, and a substantially lower center of the lower deployment portion 50 are provided.
  • the circular non-expandable portions C are connected by circular sewing connecting portions SC forming the respective non-expandable portions C.
  • connection panel PN includes a sewing joint 40 for sewing both sides of the second bag 36, and pressing and unfolding chambers 37a, 37b, 37c, and 37d of the second knot 35 as shown in FIG.
  • the two circular non-expandable portions L and R are defined and joined by annular sewing joints SL and SR, respectively.
  • connection panel PN is located on the upper side of the first bag 35 (see FIG.
  • FIG. 11 (a) is an enlarged perspective view of a coupling portion between one outlet flow path 35t and the introduction flow path 36i in FIG. 4, and FIG. 11 (b) is one lead out.
  • FIG. 12 is an external perspective view of a covering portion having a fitting covering the outer periphery of the joint portion between the flow path 35t and the introduction flow path 36i, and FIG. 12 is a CC cross-sectional view in FIG. 11 (a).
  • the outlet flow path 35t of the first bag 35 is inserted into the introduction flow path 36i of the second bag 36, and an overlapping portion thereof is caused by the flow path coupling member 60.
  • the flow path coupling member 60 is attached so as to be tightened from the outer periphery of the introduction flow path 36i at the same overlap portion with the hollow communication pipe 61 that is passed through the overlap portion between the discharge flow path 35t and the introduction flow path 36i.
  • an outer peripheral fastening member 62 is an outer peripheral fastening member 62.
  • the hollow communication pipe 61 is made of, for example, a relatively hard plastic, and has an inner diameter formed in a circular pipe (pipe) shape that is large enough to allow the pressure fluid to flow smoothly. Is.
  • the outer peripheral fastening member 62 is fastened to the hollow communication pipe 61 while securing high sealing performance by tightening the overlapping portion of the outlet flow passage 35t and the introduction flow passage 36i from the outer periphery. Can be used.
  • the first bag 35 and the second bag 36 combined in this way are combined into a single airbag 11, which is folded and stored in the retainer 12 when it is attached to the retainer 12.
  • the hollow communication pipe 61 is made of a hard material, the shape of the hollow communication pipe 61 is not crushed even when the airbag 11 is folded, that is, the flow path in the overlapping portion of the outlet flow path 35t and the inlet flow path 36i. The cross-sectional shape and the communication state are maintained.
  • the lead-out flow path 35t of the first bag 35 is inserted into the introduction flow path 36i of the second bag 36.
  • the outer peripheral side of the outer peripheral fastening member 62 coupled to the outer periphery of the communication pipe 61 is covered with a pipe band B as a protective member. Further, on the upper side surface of the pipe band B, a mounting piece T having two mounting holes H corresponding to the mounting screw holes at the lower part of the retainer 12 protrudes.
  • the pipe band B is covered with, for example, a cloth, iron, or resin cylinder.
  • the outlet channel 35t and the inlet channel 36i communicate the interior of the two chambers of the first bag 35 and the second bag 36.
  • the cross-sectional shape of the flow path can be maintained by the flow path coupling member 60 without being pressed by the expansion of the bag.
  • the pressure fluid can be smoothly circulated from the first bag 35 to the second bag 36, and the deployment performance of the airbag 11 as a whole can be improved.
  • the coupling portion is coupled by sewing or the like, such a harmful effect can be suppressed by providing a force flow path coupling member 60 that may cause pressure loss of the sewing partial force pressure fluid.
  • the deployment performance of the airbag 11 as a whole can be improved.
  • the coupling portion (in other words, the flow path coupling member) of the lead-out flow path 35t and the introduction flow path 36i communicating the insides of the two chambers of the first bag 35 and the second bag 36. (Positioning position of 60) force
  • the first bag 35 and the second bag 36 are provided at such positions that do not hinder the expansion and deployment of the first bag 35 and the second bag 36 (in this example, the pressing of the first bag 35, which is the expansion portion)
  • the deployment portion 37 and the lower deployment portion 50 of the second bag 36 are arranged on the inflator supply side outside the expansion range so that bending or the like does not occur).
  • the joint part itself becomes difficult to be pressed due to the expansion of the bag at the time of inflating and deploying, so that the reduction in the cross-sectional shape of the flow path can be reduced and the first bag to the second bag can be reduced.
  • the deployment performance of the entire airbag can be improved by smoothly circulating the pressure fluid.
  • the flow path coupling member 60 includes the hollow communication pipe 61 that passes through both the lead-out flow path 35t and the lead-in flow path 36i, and the lead-out flow path 35t. And the outer periphery fastening member 62 that tightens the introduction passage 36i from the outer periphery and fastens it to the hollow communication pipe 61, so that the lead-out passage 35t that is a tubular passage and the introduction flow even if the airbag 11 is folded.
  • the hollow connection pipe 61 maintains the channel cross-sectional shape on both inner peripheral sides without being crushed, and the outer peripheral tightening member 62 is fastened with high sealing performance by the force S.
  • the outlet channel 35t is inserted into the inner periphery of the inlet channel 36i.
  • the hollow communication pipe 61 is inserted into the inner periphery of the outlet flow path 35t, even when a pressurized fluid is led out from the outlet flow path 35t at a high pressure, the pressure directly from the outlet flow path 35t to the outside. Forces all the pressure fluid that does not leak out into the second bag 36.
  • the outer peripheral side of the flow path coupling member 60 that couples the outlet flow path 35t of the first bag 35 and the introduction flow path 36i of the second bag 36, and one side is connected to the retainer 12. Since the first and second bags 35, 36 are deployed, the movement of the flow path coupling member 60 is suppressed, and the first and second bags 35, 36 are It is possible to prevent 36 from coming into contact with the outer periphery of the outer peripheral fastening member 62 and damaging it. As a result, the pressure fluid can be smoothly circulated from the first bag 35 to the second bag 36, and the deployment performance of the airbag 11 as a whole can be improved.
  • the first bag 35 includes a pressing and expanding portion 37 that is inflated and deployed by the pressure fluid supplied from the inflator 13, and the second bag 36 is supplied by the pressure fluid supplied from the inflator 13.
  • the press deployment part 37 of the first bag 35 is inflated.
  • the upper deployment section 39 of the second bag 36 is inflated and deployed above the head of the occupant 2 and above the head of the occupant 2 Can be restricted.
  • the pressing and expanding portion 37 of the first bag 35 is inflated and deployed on the side facing the occipital portion of the occupant 2, and the second bag 36 is inflated and deployed on the side opposite to the occupant 2.
  • the first bag 35 is first supplied with the pressure fluid from the inflator 13 and starts inflating and deploying.
  • the pressure fluid is introduced into the second bag 36 and the upper deploying portion 39 is located above the head of the occupant 2.
  • the pressure fluid is supplied from the inflator 13 to the airbag 11.
  • the pressing and deploying portion 37 of the first bag 35 is inflated, and the unfolding of the second bag 36 is promoted by the deploying and guiding portion 90 during the expansion. This also improves the deployment performance of the entire airbag 11.
  • the sewn joint portion formed in the press development portion 37 and the sewn joint portion formed in the lower development portion 50 in FIGS. 4, 6, and 7 are shifted from each other. It is formed with.
  • the sewn joint parts 40a, 40b, 40c, 40d, and 40e are formed in the respective thickness directions.
  • the arrangement of the thick part between the upper thin collar and the sewing joints 40a, 40b, 40c, 40d, 40e is arranged so as to be shifted from each other in the pressing development part 37 and the lower development part 50.
  • the pressing deployment part 37 and the lower deployment part 50 overlap and press the occupant's 2 rear head, the above-described thin part and thin part or thick part and thick part do not overlap, that is, the thickness of the airbag 11 as a whole.
  • the back of the occupant 2 can be naturally pressed without causing a large bias.
  • the outlet flow path 35t of the first bag 35 is provided so as to be separated from the extension line of the pressure fluid flowing in from the gas supply port 35a.
  • the pressure fluid does not flow directly from the gas supply port 35a into the outlet flow path 35t, but flows in a detour over time. For this reason, a time difference can be provided between the inflated deployment of the first bag 35 and the inflated deployment of the second bag 36.
  • the order of inflating and deploying the two chambers is clarified, and the airbag 1 1 Smooth expansion and deployment of the whole becomes possible.
  • the bag 36 is disposed at a position that does not hinder the expansion and expansion of the bag 36, and the coupling portion is further connected by the flow path coupling member 60.
  • the coupling site of the outlet channel 35t and the inlet channel 36i is not a rigid body like the channel coupling member 60, but is configured by a substantially cylindrical passage by, for example, normal base fabric sewing, 1 bar Do not obstruct the expansion and deployment of the bag 35 and the second bag 36! Even in such a configuration, at least the path of the base fabric stitching is inflated and deployed in the first bag 35 and the second bag 36 (each bag base fabric when the shape is changed from the stored state and inflated and deployed.
  • the pressure due to the effect of the expansion of the knot is reduced, reducing the reduction in the cross-sectional shape of the flow path, and smoothing the pressure fluid from the first bag to the second bag.
  • deployment performance of the whole airbag is acquired.
  • the coupling portion of the outlet channel 35t and the inlet channel 36i is connected by the channel coupling member 60, and the channel coupling member 60 is inflated and deployed in the first bag 35 and the second bag 36 (stored state).
  • the channel coupling member 60 is inflated and deployed in the first bag 35 and the second bag 36 (stored state).
  • the coupling portion of the outlet channel 35t and the inlet channel 36i is caused by the expansion of the bag as compared with the case where the coupling channel is formed by a substantially cylindrical passage made of, for example, a normal base cloth.
  • the cross-sectional shape of the flow path can be maintained without being pressed.
  • the pressure fluid can be smoothly circulated from the first knot to the second bag to improve the deployment performance of the entire airbag. .
  • FIG. 1 is a schematic side view of a seat of an automobile provided with an embodiment of an airbag device of the present invention, (a) when the airbag device is not in operation, and (b) is an airbag device. This shows the time of operation.
  • FIG. 2 is a perspective view showing a fixing structure to a seat frame according to an embodiment of the airbag apparatus of the present invention.
  • FIG. 3 is an exploded perspective view of the airbag apparatus showing the fixing structure in more detail.
  • FIG. 4 is a perspective view showing the entire structure of the airbag in a fully inflated and deployed state.
  • FIG. 5 is a plan view seen from the second base fabric side showing the overall structure of the first bag and the second bag that are sewn together and in a state before inflation and deployment.
  • FIG. 6 Viewed from the second base fabric side showing the overall structure of the first bag before inflated deployment It is a top view.
  • Fig. 8 is a development view of the connection panel.
  • FIG. 9 is a cross-sectional view of A-A spring in FIG.
  • FIG. 10 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 11 (a) is a perspective view showing a partially enlarged perspective view of a coupling portion between one lead-out flow path and the introduction flow path in FIG. 4, and (b) is one lead-out flow path and the introduction flow path.
  • FIG. 12 is a CC cross-sectional view in FIG. 11 (a).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne une technique efficace destinée à améliorer la performance d'expansion d'un airbag en permettant à un fluide sous pression de s'écouler en douceur entre les corps d'airbag lors du gonflement et de l'expansion de l'airbag. Un dispositif d'airbag ayant un premier airbag (35) réalisé à partir de corps d'airbag que l'on réalise en reliant des morceaux de tissu de base et ayant une trajectoire d'écoulement d'alimentation (35a) et une trajectoire d'écoulement de sortie (35t), la trajectoire d'écoulement d'alimentation (35a) amenant un fluide sous pression apporté par un gonfleur jusqu'à l'intérieur du premier airbag, la trajectoire d'écoulement de sortie (35t) menant le fluide sous pression jusqu'à l'extérieur ; un deuxième airbag (36) réalisé à partir de corps d'airbag que l'on réalise en reliant des morceaux de tissu de base et ayant une trajectoire d'écoulement d'entrée (36i) pour amener le fluide sous pression sortant par la trajectoire d'écoulement de sortie (35t) du premier airbag (35) jusqu'à l'intérieur du deuxième airbag (36) ; un organe d'accouplement de trajectoires d'écoulement (60) permettant de relier ensemble la trajectoire d'écoulement de sortie (35t) du premier airbag (35) et la trajectoire d'écoulement d'entrée (36i) du deuxième airbag (36), les formes transversales des trajectoires d'écoulement étant maintenues ; un dispositif de retenue permettant de recevoir et de tenir le premier airbag (35) et le deuxième airbag (36) ; et un collier de tuyau (B) ayant un côté raccordé sur le dispositif de retenue et l'autre côté disposé de manière à recouvrir le côté périphérique extérieur de l'organe d'accouplement de trajectoires d'écoulement (60).
PCT/JP2007/067271 2006-09-21 2007-09-05 Dispositif d'airbag WO2008035568A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-255805 2006-09-21
JP2006255805A JP2008074247A (ja) 2006-09-21 2006-09-21 エアバッグ装置

Publications (1)

Publication Number Publication Date
WO2008035568A1 true WO2008035568A1 (fr) 2008-03-27

Family

ID=39200395

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/067271 WO2008035568A1 (fr) 2006-09-21 2007-09-05 Dispositif d'airbag

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JP (1) JP2008074247A (fr)
WO (1) WO2008035568A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1071915A (ja) * 1996-08-30 1998-03-17 Tachi S Co Ltd 車両用シートの頭部拘束方法およびエアバッグ内蔵シート
JP2002037011A (ja) * 2000-06-13 2002-02-06 Takata Corp 車両乗員のための保護装置および乗員の保護方法
JP2004210048A (ja) * 2002-12-27 2004-07-29 Takata Corp エアバッグ装置
JP2005224565A (ja) * 2004-02-13 2005-08-25 Kiyobumi Nagasaka 両手に取り付けられたリボンにより物を持つぬいぐるみ。
JP2006088840A (ja) * 2004-09-22 2006-04-06 Honda Motor Co Ltd 車両用乗員保護装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1071915A (ja) * 1996-08-30 1998-03-17 Tachi S Co Ltd 車両用シートの頭部拘束方法およびエアバッグ内蔵シート
JP2002037011A (ja) * 2000-06-13 2002-02-06 Takata Corp 車両乗員のための保護装置および乗員の保護方法
JP2004210048A (ja) * 2002-12-27 2004-07-29 Takata Corp エアバッグ装置
JP2005224565A (ja) * 2004-02-13 2005-08-25 Kiyobumi Nagasaka 両手に取り付けられたリボンにより物を持つぬいぐるみ。
JP2006088840A (ja) * 2004-09-22 2006-04-06 Honda Motor Co Ltd 車両用乗員保護装置

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