SE544258C2 - An airbag comprising a plurality of inflatable air chambers and a non-inflating adjustment section - Google Patents

An airbag comprising a plurality of inflatable air chambers and a non-inflating adjustment section

Info

Publication number
SE544258C2
SE544258C2 SE1950614A SE1950614A SE544258C2 SE 544258 C2 SE544258 C2 SE 544258C2 SE 1950614 A SE1950614 A SE 1950614A SE 1950614 A SE1950614 A SE 1950614A SE 544258 C2 SE544258 C2 SE 544258C2
Authority
SE
Sweden
Prior art keywords
section
airbag
main body
inflating
gas
Prior art date
Application number
SE1950614A
Other languages
Swedish (sv)
Other versions
SE1950614A1 (en
Inventor
Kazushige Hashimoto
Tomotaka Ishikawa
Original Assignee
Nihon Plast Co Ltd
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
Priority claimed from JP2019069071A external-priority patent/JP7223620B2/en
Application filed by Nihon Plast Co Ltd filed Critical Nihon Plast Co Ltd
Publication of SE1950614A1 publication Critical patent/SE1950614A1/en
Publication of SE544258C2 publication Critical patent/SE544258C2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/0406—Accessories for helmets
    • A42B3/0486—Airbags
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/015—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with shock-absorbing means
    • A41D13/018—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with shock-absorbing means inflatable automatically
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/066—Impact-absorbing shells, e.g. of crash helmets specially adapted for cycling helmets, e.g. for soft shelled helmets
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/069—Impact-absorbing shells, e.g. of crash helmets with soft external layer, e.g. for use in impact sports
    • 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
    • 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
    • B60R21/20—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
    • B60R2021/2074—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats in head rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J27/00—Safety equipment
    • B62J27/20—Airbags specially adapted for motorcycles or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J43/00—Arrangements of batteries
    • B62J43/30—Arrangements of batteries for providing power to equipment other than for propulsion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Textile Engineering (AREA)
  • Air Bags (AREA)

Abstract

There is provided an airbag that can obtain an appropriate protection performance with a simple structure. Airbag (10) includes bag-shaped airbag main body section (12) that has a plurality of air chambers (19), into each of which a gas is introduced and which are arranged side by side. Airbag (10) includes adjustment section (31) that regulates an inflated shape of airbag main body section (12) such that the tip side of airbag main body section (12) is pulled onto head (A) toward a base end side.

Description

Technical Field id="p-1"
[0001] The present invention relates to an airbag that protects a head of an occupant.
Background Art id="p-2"
[0002] In the related art, a head protection airbag apparatus that covers and protectsa head of an occupant of a tWo-Wheeled vehicle such as a bicycle, or covers and protectsa head of an occupant seated in a seat of an automobile is known as an airbag apparatusincluding an airbag that inflates and deploys as a gas is introduced. For example, anairbag main body section used in such an airbag apparatus includes a plurality oflongitudinal air chambers, and the air chambers are arranged side by side. The airbagmain body section is accommodated in a folded state, and inflates and deploys due to thegas introduced from near a back of the head, thereby covering a portion ranging from theback of the head to a forehead including both sides of the head. id="p-3"
[0003] ln a case of this configuration, When the airbag main body section inflates dueto the infloW of a gas introduced from a deployment base end side, the airbag main bodysection is pulled due to the inflation, and a forehead protection portion, Which is adeployment tip side, is lifted from the forehead of the occupant. id="p-4"
[0004] For example, a configuration Where a surface of an inner bag that maintains thegas and deploys is covered by an outer bag, and thereby a shape is maintained is known (for example, refer to PTL 1).
Citation List Patent Literature id="p-5"
[0005] PTL 1 Japanese Translation of a PCT Application Laid-Open No. 2013-540209 (Page 6-10, FIG. 2) Summary of Invention Technical Problem id="p-6"
[0006] HoWeVer, it is difficult to reduce manufacturing costs under a complicatedstructure of the airbag main body section. id="p-7"
[0007] The present invention is devised in view of such a point, and an object thereof isto provide an airbag that can obtain an appropriate protection performance With a simple structure.
Solution to Problem id="p-8"
[0008] According to Claim 1, there is provided an airbag that is inflated by anintroduced gas to protect a head of an occupant. The airbag includes a bag-shapedairbag main body section that has a plurality of air chambers, into each of Which the gas w is introduced :ïësc-:ïa 9 ffïsàas: àtr~fifiï=çizcfïífni: seflíråígaïx: and Which are arranged side by side, and an adjustment section that regulates an inflated shape of the airbag main body section such that a tip side of the airbag main body section is pulled onto the head toWard y ' :the adjustment section is formed in a non-inflating section into Which the gas is not introducedgfi. n: * .w ~ v: ÉV_°ÉÉ~'ÉÉT¶~'TI ¿; si; fin. 1, J: 1111:; ;::f;.fï>::;g§ :Ä ~'"Éi.l::f:;:i; íÉï, the adjustment section is formed /1»z1+ by folding and fixing a part of the non-inflating section.
According to Claim in the airbag ofwàsl.y1~~e§se~~~s:sš5 Claims a reinforcement section that ;.f.^:,.i::,ffíí:ï ïïiffqf :t“Tj;,;ï^.:,1:'_fi;:*: ':'1~f:.ïi{1:_ to s: o: a load Which accompanies inflation , each of the adjustmentsection and the reinforcement section is a seWing section formed of a sewing thread, and the reinforcement section eXtends as: :md sms~vlzíxi>sis of a átš :i In the airbag of Claim 1, by the adjustment section regulating the tip sideof the inflated shape of the airbag main body section that has the plurality of airchambers, into each of Which the gas is introduced and Which are arranged side by side,to be pulled onto the head toWard the base end side, the tip side of the airbag main bodysection can be inflated to appropriately cover a protection target area of the head of theoccupant. Thus, it is possible to obtain an appropriate protection performance With a simple configuration.
In the airbag of Claim 2, in addition to an effect of the airbag of Claim 1, byforming the adjustment section in the non-inflating section, it is possible to easily form the adjustment section Without obstructing the flow of a gas in each of the air chambers.
In the airbag of Claim 3, in addition to an effect of the airbag of Claim 2, byfolding and fixing a part of the non-inflating section and forming the adjustment section,an amount by Which the tip side of the airbag main body section is pulled to the headcan be easily adjusted by folding the non-inflating section. [i In the airbag of Claim 4, in addition to an effect of the airbag of any one of Claims 1 to 3, by the reinforcement section protecting the adjustment section from theload Which accompanies the inflation of the airbag main body section, the adjustmentsection can be reliably prevented from being damaged at the time of inflation of theairbag main body section, and it is possible for the adjustment section to alloW the tipside of the airbag main body section to inflate such that the protection target area of thehead of the occupant is appropriately covered. lïQ. ïrïï] In the airbag of Claim 5, in addition to an effect of the airbag of Claim 4, by forming the adjustment section and the reinforcement section as the seWing sectionsformed of the seWing threads and extending the reinforcement section along the directionintersecting the adjustment section toWard the tip side of the airbag main body section,the reinforcement section can effectively receive the load Which accompanies theinflation of the airbag main body section, and the adjustment section can be reliably prevented from being damaged due to rupture of the seWing thread caused by this load.
Brief Description of DraWings [i FIG. 1A is a side view illustrating an inflated and deployed state of an airbagaccording to Embodiment 1 of the present invention, and FIG. 1B is a side view illustrating an inflated and deployed state of an airbag according to a comparative example; FIG. 2 is a plan view iIIustrating a state of a base c1oth configuring the airbag; FIG. 3A is a side view illustrating a part of the airbag, and FIG. 3B is a sectionalview taken at a position corresponding to I-I in FIG. 3A; FIGS. 4A to 4G are explanatory views illustrating a manufacturing process ofan airbag main body section of the airbag, and FIG. 4D is a sectional view taken at aposition corresponding to II-II in FIG. 4G; FIG. 5A is a side view iIIustrating a part of an airbag according to Embodiment2 of the present invention, and FIG. 5B is a sectional view taken at a positioncorresponding to III-III in FIG. 5A; FIG. 6A is a side view iIIustrating a part of an airbag according to Embodiment8 of the present invention, and FIG. 6B is a sectional view taken at a positioncorresponding to IV-IV in FIG. 6A; FIG. 7A is a side View illustrating an inflated and deployed state of an airbagaccording to Embodiment 4 of the present invention, and FIG. 7B is an enIarged sideview illustrating a part of FIG. 7A; FIG. 8 is a plan view illustrating a state of a base c1oth configuring an airbagaccording to Embodiment 5 of the present invention; and FIG. 9A is a side view illustrating a part of the airbag, and FIG. 9B is a sectional view taken at a position corresponding to I-I in FIG. 9A.
Description of Embodiments I Hereinafter, Embodiment 1 of the present invention Will be described With reference to the draWings.
In FIG. 1A, the reference sign 10 indicates an airbag. Airbag apparatus11, Which includes this airbag 10 and is illustrated in FIG. 2, is a head protection airbagapparatus that protects headA of an occupant of a bicycle or the like, which is a movingbody. ln the embodiment, airbag apparatus 11 is, for example, an airbag apparatus fora two-wheeled vehicle, which is mounted in the vicinity of a neck of the occupant.Hereinafter, description will be made based on each of a front-and-rear direction (anarrow FR direction and an arrow RR direction), a right-and-left direction (an arrow Ldirection and an arrow R direction), and an up-and-down direction (an arrow U directionand an arrow D direction), which are set with a state where the occupant has mountedairbag apparatus 11 as reference. [ii ~] Since this airbag apparatus 11 can also be called as an airbag module, the airbag apparatus includes an inflator that supplies a gas to airbag main body section 12,a control section that controls operation of the inflator, and a battery (secondary battery),which is a power supply of the inflator and the control section, in addition to airbag 10having airbag main body section 12 which is a bag-shaped outer shell section. Airbag10 (airbag main body section 12), which is in a folded state through a predeterminedmethod, the inflator, the control section, and the battery are accommodated, for example,inside a fabric cover, and airbag apparatus 11 is mounted by being wrapped in the vicinity of the neck of the occupant. [<2 il The inflator includes a main body section having a disk shape or acylindrical shape. An igniter and a chemical are accommodated inside the main bodysection. An electric signal from the control section, which is transmitted via a connectorconnected thereto, causes the igniter to combust the chemical, and a gas for inflation is rapidly supplied into airbag main body section 12 from a gas ejection port formed in the main body section.
The control section includes a sensor that detects impact and a controlapparatus. The control apparatus is connected to the inflator via a signal line, and operates the inflator When the sensor detects predetermined impact.
Airbag main body section 12 is formed in a bag shape as a Whole bycombining and joining a single, or a plurality of base cloths through seWing, bonding, orWelding. That is, airbag main body section 12 may be a so-called one-piece Woven(OPW) airbag formed by Weaving one base cloth, or may be an airbag formed in a bagshape by joining tWo or more base cloths through seWing. In addition, airbag main bodysection 12 includes gas introduction section 15 into Which a gas is introduced from theinflator, inflating section 16 that inflates due to the gas introduced from gas introductionsection 15, and non-inflating section 17 into Which the gas is not introduced. Airbagmain body section 12 is joined by joining section 18 formed through seWing, and is formedto have a helmet-like three-dimensional shape that covers the head from the vicinity of the neck of the occupant in an inflated and deployed state.
Gas introduction section 15 is formed as an opening portion. Gasintroduction section 15 is a section that becomes a deployment base end side of airbagmain body section 12. In the embodiment, gas introduction section 15 is positioned atthe rear of the vicinity of the neck of the occupant. For example, a part of the main body section of the inflator may be inserted in gas introduction section 15. [<2 l Inflating section 16 includes a plurality of air chambers (chambers) 19 that inflate due to the introduction of a gas from gas introduction section 15. In addition,gas guide section 20 that controls the flow of the gas, Which is introduced into air chambers 19, is formed in inflating section 16.
A plurality of first air Chambers 22 that extend along the right-and-leftdirection and a plurality of second air Chambers 23 that extend radially are set in air Chambers 19.
Each of first air Chambers 22 is an air Chamber into Which a gas is directlyintroduced from gas introduction section 15 via the inflator. Each of first air Chambers22 is longitudinally formed in the right-and-left direction, and protrudes to the right orto the left from gas introduction section 15. Respective first air Chambers 22 arepositioned to wrap the vicinity of the neck of the occupant such that respective tip sidesoppose each other at positions in front of the neck of the occupant, thereby protecting the neck of the occupant in an inflated and deployed state. [iiC Respective second air Chambers 23 are positioned above each first airChamber 22, and are arranged side by side on the right and the left. In the embodiment,respective second air Chambers 23 are arranged, for example, symmetrically on the rightand the left. Although three second air Chambers 23 are formed on each of both rightand left side portions and one second air Chamber is formed in a middle portion in theembodiment, the number or the shape of second air Chambers is not limited. In addition,each of second air Chambers 23 spreads open in a so-Called finger shape such that adistance between edge portions gradually increases from a base end side (lower side)toward a tip side (upper side) thereof, for example, in a state where the base Cloth is yetto be joined by joining section 18 (FIG. 2). Therefore, there is notch portion 25 betweensecond air Chambers 23 in a state where the base Cloth is yet to be joined by joiningsection 18 in the embodiment, and thereby second air Chambers 23 are formed to beseparated away from each other. In an inflated and deployed state, each of second air Chambers 23 protects a position ranging from a back portion to both side portions and a front portion of head A of the occupant.
Although it is possible to form gas guide section 20 at any position and inany shape insofar as the gas guide section can effectively introduce gas into air chambers19, for example, first gas guide sections 27 that are positioned close to gas introductionsection 15 and lead a gas upWards, second gas guide sections 28 that further lead the gasfrom first gas guide sections 27 to the right and the left, and third gas guide section 29that further leads the gas from first gas guide section 27 to the upper right and left areset in the embodiment. Gas guide section 20 is formed, for example, by joining the basecloth through seWing. -šïl Non-inflating section 17 is formed in a fin shape along an outer edge of each of air chambers 19 of inflating section 16 in a state Where the base cloth is yet to be joinedby joining section 18. Non-inflating section 17 of the embodiment is formed, for example,as joining alloWance (seam alloWance) for air chambers 19 in the base cloth. In theembodiment, adjustment section 31 is formed in non-inflating section 17. Adjustmentsection 31 regulates an inflated shape of airbag main body section 12 such that thedeployment tip side (upper front side) of airbag main body section 12 is pulled onto headA of the occupant toward the deployment base end side (lower rear side). In theembodiment, adjustment section 31 is formed by being fixed through seWing in a stateWhere a part of non-inflating section 17 is picked and folded, as illustrated in FIGS. 3Aand 3B. For example, adjustment section 31 of the embodiment is a seWing sectionformed by a seWing thread. In the embodiment, a folded shape of non-inflating section17 for forming adjustment section 31 may be, for example, linearly formed along first airchambers 22 in the right-and-left direction. A folded position of non-inflating section 17 for forming adjustment section 31 is on a base end side of each of first air chambers 22, that is, a position close to gas introduction section 15. In addition, adjustmentsection 31 of the embodiment is formed in each position of non-inflating section 17between each first air chamber 22 and each second air chamber 23. For this reason, inan inflated and deployed state of airbag main body section 12, adjustment section 31 ispositioned above each first air chamber 22 and is arranged on each of both sides of theneck (jaw) of the occupant.
IW ifs] Joining section 18 is formed, for example, through sewing, and finalizes a position of non-inflating section 17 on the tip sides of second air chambers 23. In theembodiment, for example, in a state where second air chambers 23 are arranged side byside on the right and the left to overlap a part of each other as illustrated in FIG. 4Bafter a state of the base cloth illustrated in FIG. 4A, joining section 18 is formed byjoining the tip sides of second air chambers 23 through sewing as illustrated in FIG. 4GFor this reason, as illustrated in FIG. 4D, joining section 18 allows a part of each ofadjacent second air chambers 23 to be formed to overlap each other in the right-and-leftdirection and the up-and-down direction, and allows second air chambers 23 to beintegrated with each other in a state of being close to each other in the right-and-leftdirection. More specifically, adjacent second air chambers 23 are arranged side by sidewhile overlapping each other in a diagonal direction from a top of the head to both sideportions of the head of the occupant in airbag main body section 12. Thus, airbag mainbody section 12 is disposed to have a three-dimensional shape. That is, second airchambers 23 are arranged to overlap each other such that the deployment tip side ofairbag main body section 12 shrinks. J oining section 18 may be formed after forming adjustment section 31, or may be formed before forming adjustment section 31.
Next, deployment operation of airbag apparatus 11 will be described.
To describe the outline of the operation of airbag apparatus 11, if the sensordetects predetermined impact When a collision of the tWo-Wheeled vehicle occurs, thecontrol apparatus operates the inflator, and causes the inflator to eject a gas. Then, thegas ejected from the inflator floWs into airbag main body section 12 from gas introductionsection 15, and is introduced into each of first air chambers 22 and second air chambers23 by gas guide section 20. By airbag main body section 12 inflating and deploying froma folded state, the airbag main body section ruptures a part of the cover at a deploymentpressure and protrudes, thereby covering head A from the back of the head to the forehead of the occupant.
[W At this time, second air chambers 23 deploy While falling forWard tosurround an upper portion and both side portions of head A of the occupant from the rearas the introduced gas passes from the base end side to the tip side. For this reason, ininflating section 16, first air chambers 22 inflate and deploy nearby the neck of theoccupant, and second air chambers 23 deploy in a rounded three-dimensional shape(Which surrounds head A from the rear) that matches the shape of head A. That is,inflating section 16 deploys in a pocket shape (half dome shape) of Which an inner sideis an occupant opposing portion that opposes head A of the occupant. At this time, byadjustment section 31 regulating the deployment tip side of the inflated shape of airbagmain body section 12 to be pulled onto head A toWard the deployment base end side, thedeployment tip side of airbag main body section 12 can be inflated and deployed toappropriately cover the front portion of head A of the occupant, Which is a protectiontarget area of head A of the occupant, that is, the forehead. Specifically, as illustratedin FIG. 1A, adjustment section 31 acts such that front end portion P, Which is a tip side of airbag main body section 12 in an inflated and deployed state, is pulled to a position of the forehead of the occupant, and front end portion P of airbag main body section 12is inclined to cover the forehead of the occupant from above compared to airbag mainbody section 12a of airbag 10a of a comparative example, Which does not includeadjustment section 31 and is illustrated in FIG. 1B. That is, even When airbag 10aformed of a flat base cloth is joined to have a three-dimensional shape, it is difficult tomake the airbag three-dimensional such that the forehead of head A of the occupant iscovered. ln the embodiment, on the other hand, Without performing complicated joining,an inclination of airbag main body section 12 in a deployed state can be easily changedonly With adjustment section 31, and the airbag main body section can be deployed tocover the forehead of the occupant. As a result, it is possible for airbag 10 to obtain anappropriate protection performance With a simple structure, for example, compared to acase of taking measures such as making the shape of the base cloth or seWingcomplicated, or increasing the capacity of airbag main body section 12 by taking into account a lifted amount from the protection target area.
In addition, by forming adjustment section 31 in non-inflating section 17,it is possible to easily form adjustment section 31 Without obstructing the flow of a gas in each of air chambers 19.
'If-l By folding and fixing a part of non-inflating section 17 and formingadjustment section 31, an amount by Which the deployment tip side of airbag main body section 12 is pulled to head A can be easily adjusted by folding non-inflating section 17.
For example, adjustment section 31 may be formed by folding and fixingnon-inflating section 17 in an inclined shape as in Embodiment 2 shoWn in FIGS. 5A and5B, or may be formed by folding and fixing non-inflating section 17 tWice or more as in Embodiment 3 shoWn in FIGS. 6A and 6B. By adjusting a folded point or a folding amount of non-inflating section 17 in such a manner, an angle or a position of thedeployment tip side of airbag main body section 12 can be adjusted as appropriate. Thatis, adjustment section 31 can be formed by folding non-inflating section 17 at any foldedpoint by any folding amount according to a desired shape of airbag main body section 12in an inflated and deployed state. [i :Tåšl Next, Embodiment 4 Will be described With reference to FIGS. 7A and 7B.
The same configurations and effects as each embodiment Will be assigned With the samereference signs, and description thereof Will be omitted. [i fiïšl Airbag 10 of the embodiment includes reinforcement section 35 that protects adjustment section 31 from a load Which accompanies the inflation of airbagmain body section 12. [il] As illustrated in FIG. 7A, reinforcement section 35 is a seWing section formed of a seWing thread as adjustment section 31, and reinforcement section 35 of theembodiment is an extended seWing section formed by extending the seWing threadconfiguring adjustment section 31. That is, reinforcement section 35 and adjustmentsection 31 are formed of the same seWing thread. In the embodiment, reinforcementsection 35 is disposed in non-inflating section 17. For example, reinforcement section35 is formed to extend in a part of non-inflating section 17, in Which adjustment section31 is formed. Reinforcement section 35 may be formed in a portion of non-inflatingsection 17, in Which adjustment section 31 is positioned and Which is picked and folded,or may extend in a portion of non-inflating section 17, Which is not picked and folded.ln a case of forming in the portion of non-inflating section 17, Which is picked and folded,for example, reinforcement section 35 may be formed along bent portion 36 Which is formed by bending a part of non-inflating section 17 at a portion Where adjustment section 81 is positioned, as illustrated in FIG. 7 B. Reinforcement section 85 isconnected to adjustment section 81, and is formed in an inclined shape along a directionintersecting adjustment section 81. Reinforcement section 85 eXtends from an endportion of adjustment section 81 toWard the tip side of airbag main body section 12, that is, the upper front side.
Although a load of non-inflating section 17, Which is picked and folded andis fixed by adjustment section 81, returning to an original shape in response to theregulation of adjustment section 81 is generated in airbag main body section 12 in thedirection intersecting adjustment section 81, that is on the upper rear side (arrow Fdirection) in the embodiment, the load can be received by reinforcement section 85extending along a direction intersecting or orthogonal to the load. Therefore, loadcapacity can be improved, and the seWing thread of adjustment section 81 can be prevented from being ruptured by the load.
In addition, When a gas ejected from the inflator floWs into airbag mainbody section 12 from gas introduction section 15, and is introduced into each of first airchambers 22 and second air chambers 28 by gas guide section 20, and airbag main bodysection 12 inflates and deploys from a folded state, second air chambers 28 deploy Whilefalling forWard to surround the upper portion and both side portions of head A of theoccupant from the rear as the introduced gas passes from the base end side to the tipside. Therefore, in an early stage of deployment, a load Which accompanies the inflationof airbag main body section 12 is generated toWard the upper rear side, that is, thedirection intersecting adjustment section 81, in other Words, a direction of shearing theseWing thread configuring adjustment section 81. That is, a load is generated along the same direction as a load of non-inflating section 17 of airbag main body section 12 returning to an original shape in response to the regulation of adjustment section 31.By reinforcement section 35 being formed to extend along the direction intersectingadjustment section 31, the load is effectively received by the reinforcement section 35,and the load is prevented from concentrating on only a front end portion of adjustmentsection 31. By reinforcement section 35 protecting adjustment section 31 from the loadWhich accompanies the inflation of airbag main body section 12 in such a manner, loadcapacity can be improved, and adjustment section 31 can be reliably prevented frombeing damaged at the time of inflation of airbag main body section 12. That is, theseWing thread of adjustment section 31 can be prevented from shearing caused by theload. For this reason, it is possible for adjustment section 31 to alloW the tip side ofairbag main body section 12 to inflate such that the protection target area of the head ofthe occupant is appropriately covered. [i In addition, since non-inflating section 17 is narroW in a direction intersecting a direction Where adjustment section 31 eXtends, that is, the up-and-doWndirection in the embodiment by being folded by adjustment section 31, the folded portionis connected to an end portion of linearly extending adjustment section 31, andreinforcement section 35 is formed over a length necessary for receiving a load. Thus,it is possible to efficiently dispose adjustment section 31 and reinforcement section 35With respect to narroW non-inflating section 17, compared to a case Where the entireseWing section is inclined. [i . _] Since reinforcement section 35 is formed by being connected to adjustment section 31 by the seWing thread configuring adjustment section 31, it is possible to formthe reinforcement section by extending this seWing section When forming adjustment section 31, costs are unlikely to be high since manufacturing is easy, and it is possible to easily improve load capacity.
In addition, adjustment section 31 may be formed by fixing, through, forexample, seWing of edge portions of non-inflating section 17 While overlapping each otherthe edge portions of non-inflating section 17 in a U-shape obtained by cutting out a partof non-inflating section 17, as in Embodiment 5 illustrated in FIGS. 8, 9A and 9B. Thus,as in the case illustrated in FIG 1A, adjustment section 31 regulates an inflated shapeof airbag main body section 12 such that the deployment tip side (upper front side) ofairbag main body section 12 is pulled onto headA of the occupant toward the deploymentbase end side (lower rear side).
Thus, it is possible to easily manufacture airbag main body section 12.
Further, it is possible to easily set reinforcement section 35 in a case of formingreinforcement section 35, Which is an extended portion of the seWing section as described in FIG. 7B.
Without being limited to being formed in non-inflating section 17,adjustment section 31 and reinforcement section 35 may be formed, for example, byfolding and joining a part of the base cloth, Which configures inflating section 16 (air chambers 19), in each Embodiment.
In addition to being formed in airbag main body section 12, adjustmentsection 31 and reinforcement section 35 may be formed as a shape regulating section, forexample, a tether or a strap. [i i] In addition, airbag apparatus 11 can also be used as, for example, an airbag apparatus disposed in a headrest positioned at the rear of headA of the occupant seated in a seat of an automobile.
Industrial Applicability [är _] The present invention can be suitably used, for example, as a head protection airbag apparatus for a tWo-Wheeled vehicle.
Reference Signs List [i ] airbag 12 airbag main body section17 non-inflating section 19 air chamber 31 adjustment section reinforcement section A head

Claims (3)

1. An airbag (10) that is inflated by an introduced gas to protect a head of anoccupant, the airbag (10) comprising: a bag-shaped airbag main body section (12) that has a plurality of air Chambers(22, 23), into each of Which the gas is introduced from a gas introduction section (15) andWhich are arranged side by side; and an adjustment section (31) that regulates an inflated shape of the airbag mainbody section (12) such that a tip side of the airbag main body section (12) is pu11ed ontothe head toward the gas introduction section (15) side that constitutes a base end side, Wherein the adjustment section (31) is formed in a non-inflating section (17) intoWhich the gas is not introduced, Wherein the adjustment section (31) is formed by folding and fixing a part of the non-inflating section (17).
2. The airbag (10) according to Claim 1, further comprising:a reinforcement section (35) that extends along a direction intersecting ororthogonal to a direction of a load Which accompanies inflation of the airbag main body section (12).
3. The airbag (10) according to Claim 2, Wherein each of the adjustment section and the reinforcement section (35) is aseWing section formed of a sewing thread, and the reinforcement section (35) extends from an end portion of a tip side of theadjustment section (31) toward the tip side of the airbag main body section (12) in a direction intersecting the adjustment section (31).
SE1950614A 2018-05-25 2019-05-24 An airbag comprising a plurality of inflatable air chambers and a non-inflating adjustment section SE544258C2 (en)

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JP2019069071A JP7223620B2 (en) 2018-05-25 2019-03-29 Airbag

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DE102021129767A1 (en) * 2021-11-15 2023-05-17 Autoliv Development Ab Portable protection device
WO2023110215A1 (en) * 2021-12-16 2023-06-22 Autoliv Development Ab Helmet comprising a basic body, an inflator and an airbag

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CN110525555A (en) 2019-12-03
DE102019114015A1 (en) 2019-11-28
SE1950614A1 (en) 2019-11-26

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