• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A gas bag cover for a vehicle occupant restraint system has an inner side facing a gas bag to be covered and a wall thickness. The gas bag cover comprises at least one burst line being grooved into the cover from the inner side up to a predefined remaining wall thickness. The burst line comprises an initial point at which the remaining wall thickness has its minimum. The gas bag cover further comprises reinforcement ribs formed on the inner side of the cover, extending along a line which is tangent to the initial point of the burst line.
    公开号:US20010009326A1
    申请号:US09/761,873
    申请日:2001-01-17
    公开日:2001-07-26
    发明作者:John-Oliver Derrick
    申请人:TRW Automotive Safety Systems GmbH；
    IPC主号:B60R21-21656
    专利说明:
    [0001] The invention relates to a gas bag cover for a vehicle occupant restraint system, comprising a burst line grooved into the cover from the inner side. [0001] BACKGROUND OF THE INVENTION
    [0002] Tests have demonstrated that upon bursting of the gas bag cover stress concentrations may occur not only at the initial point but also at other locations. More particularly, if a structure has been applied to the outer side of the cover, for instance a depression or holes for securing a logo badge, the notch effect of these structures results in increased stresses. In this case, there is the risk of the cover not bursting along the provided burst line beginning at the initial point, but at just this location of maximum stress, i.e. for example in the region of an existing badge. This results in the gas bag not deploying as intended and thus in detrimenting proper functioning of the occupant restraint system. Apart from this a danger may arise in the badge releasing from the cover, constituting an additional risk of injury. [0002]
    [0003] The invention provides a gas bag cover which on deployment of the gas bag begins to burst at a precisely predefined point. [0003] BRIEF DESCRIPTION OF THE INVENTION
    [0004] For this purpose, a gas bag cover for a vehicle occupant restraint system, having an inner side facing a gas bag to be covered and a wall thickness, comprises at least one burst line being grooved into the cover from the inner side up to a predefined remaining wall thickness, the burst line comprising an initial point at which the remaining wall thickness has its minimum, and the gas bag cover further comprises reinforcement ribs formed on the inner side of the cover, the reinforcement ribs extending along a line which is tangent to the initial point. This assures that the stresses are directed in the cover to the initial point where the bursting action precisely commences. [0004]
    [0005] In accordance with one embodiment of the invention the gas bag cover comprises a badge which is applied to said cover, with the reinforcement ribs running around this badge. Thus a stress concentration in the region of the badge resulting in the cover bursting there is avoided. [0005] BRIEF DESCRIPTION OF THE DRAWINGS
    [0006] Further advantages of the invention read from the description of the preferred embodiment as illustrated in the attached drawing in which: [0006]
    [0007] FIG. 1 is an overall view of the gas bag cover in accordance with the invention from the side facing the vehicle occupant; [0007]
    [0008] FIG. 2 is a cross-section through the gas bag cover as shown in FIG. 1 taken along the line II—II in FIG. 1. [0008] DETAILED DESCRIPTION OF THE INVENTION
    [0009] Referring now to FIG. 1 there is illustrated the gas bag cover [0009] 10 provided on the inner side facing away from the vehicle occupant and towards a gas bag to be covered with a burst line 12 indicated in the drawing as a broken line. Fitted in a depression 14, roughly in the middle of the gas bag cover 10 is a badge 16.
    [0010] Referring now to FIG. 2 there is illustrated how the badge [0010] 16 is secured in the usual way by means of a rivet 18 and a lockwasher 20 to the cover 10. The cover 10 is secured to a gas bag module comprising a housing 22, a gas bag 24 and an inflator 26. Located between the cover 10 and the gas bag 24 is a contact 27 for activating a horn. In the region of the burst line 12 the wall thickness of the cover 10 is reduced. Located in the run of the burst line 12 is the so-called initial point 28 at which the remaining wall thickness of the cover 10 has its minimum. This initial point 28 serves to establish a location in the cover 10 at which the bursting of the burst line 12 is to commence. Molded to the inner side of the cover 10 are ribs 30 extending along the line 32. The line 32 is guided around the lockwasher 20 of the badge 16 and forms a tangent to the initial point 28 in an elliptic curve. The ribs 30 are achievable at no additional expense in producing the cover 10.
    [0011] When the gas bag [0011] 24 is inflated by the inflator 26 it begins to deploy and is urged against the cover 10, as a result of which the cover 10 expands outwardly, i.e. a stress materializing in the material of the cover 10. This stress peaks where the material thickness has a minimum, i.e. in the run of the burst line 12, more particularly at the initial point 28. However, also the opening in the cover 10 through which the rivet 18 protrudes constitutes a potential point at which a stress concentration could materialize. The stress is, however, guided by the greater material thickness in the region of the ribs 30 along the line 32 to the initial point 28 in bypassing the badge 16 so that the stress concentration occurs at the initial point 28 and the cover 10 first bursts at this location. Due to the notch effect of the burst line 12 it is assured that the cover 10 then opens in the manner as intended. Even if the burst should not propagate along the burst line 12 as intended it is prevented by the increased material thickness of the ribs 30 from spreading out under the badge 16. There is thus no risk of the badge 16 being released from the material of the cover 10.
    [0012] A further advantage of the ribs [0012] 30 is that they reinforce the cover 10 so that the force needed to activate the contact 27 is better distributed.
    [0013] It will readily be appreciated that the arrangement and run of the ribs is not, of course, limited to that shown in the embodiment. If needed, more ribs may also be provided. [0013]
    权利要求:
    Claims (2)
    [1" id="US-20010009326-A1-CLM-00001] 1. A gas bag cover for a vehicle occupant restraint system, having an inner side facing a gas bag to be covered and a wall thickness, said gas bag cover comprising at least one burst line being grooved into said cover from said inner side up to a predefined remaining wall thickness, said burst line comprising an initial point at which said remaining wall thickness has its minimum, said gas bag cover further comprising reinforcement ribs formed on said inner side of said cover, said reinforcement ribs extending along a line which is tangent to said initial point.
    [2" id="US-20010009326-A1-CLM-00002] 2. The cover of
    claim 1 , comprising a badge which is applied to said cover, said reinforcement ribs running around said badge.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP0358230B1|1994-12-14|Closure for an air bag deployment opening
    US5564739A|1996-10-15|Side impact airbag module with soft cover
    US7128337B2|2006-10-31|Cushion for air bag systems
    US4752083A|1988-06-21|Cover for an air bag unit
    US7246819B2|2007-07-24|Airbag module and method of restraining a vehicle occupant with such an airbag module
    US6286858B1|2001-09-11|Energy absorbing air bag module
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    KR100522870B1|2005-10-20|Mounting Structure of Air-Bag Case
    EP2116430B1|2013-03-20|Passenger airbag cushion having tether holder used in a vehicle
    KR100288087B1|2001-05-02|Passenger seat airbag device
    GB2239434A|1991-07-03|Airbag cover
    US5704635A|1998-01-06|Air bag cover holding structure
    US6464248B2|2002-10-15|Gas bag cover with burst line
    JPH07285408A|1995-10-31|Air bag device
    JP3895896B2|2007-03-22|Airbag module
    EP0881129A2|1998-12-02|Means for attaching an airbag cover
    JP2947412B2|1999-09-13|Gas bag module for passengers
    US6293626B1|2001-09-25|Tongue for an inflatable belt and an inflatable belt device
    KR20000071782A|2000-11-25|A knee restraint device for vehicles
    JPH05278548A|1993-10-26|Lid setting structure of air bag unit for front passenger' s seat
    US6572135B2|2003-06-03|Assembly, in particular gas bag module
    KR20040024280A|2004-03-20|Side air bag
    KR200387312Y1|2005-06-17|Air bag housing assembly for vehicles
    KR200387313Y1|2005-06-17|Air bag housing assembly for vehicles
    US20210291776A1|2021-09-23|Covering cap for an airbag module and airbag module having a covering cap of this type
    同族专利:
    公开号 | 公开日
    EP1118510B1|2003-11-12|
    DE50100927D1|2003-12-18|
    DE20000956U1|2000-05-31|
    ES2210039T3|2004-07-01|
    EP1118510A1|2001-07-25|
    US6464248B2|2002-10-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH0726209Y2|1988-12-29|1995-06-14|トヨタ自動車株式会社|Airbag cover|
    JP3102691B2|1989-10-30|2000-10-23|豊田合成株式会社|Steering wheel with airbag device|
    JPH05131888A|1991-11-13|1993-05-28|Kansei Corp|Storage cover body for automobile air bag device and manufacture thereof|
    US5338060A|1993-06-18|1994-08-16|Morton International, Inc.|Energy dissipation features in air bag closures|
    JP3185515B2|1994-02-17|2001-07-11|豊田合成株式会社|Airbag device pad|
    JP3327104B2|1996-03-27|2002-09-24|豊田合成株式会社|Steering wheel|
    DE19626416A1|1996-07-01|1998-01-08|Takata Europ Gmbh|Airbag module cover cap|
    DE19732022B4|1996-07-29|2004-02-12|Autoliv Development Ab|Airbag device with integrated horn switch|
    DE19648138A1|1996-11-21|1998-05-28|Opel Adam Ag|Airbag cover|
    US5893581A|1996-11-22|1999-04-13|General Motors Corporation|Air bag cover|
    DE19701106B4|1997-01-15|2004-05-27|Autoliv Development Ab|Reinforced cover cap for an airbag arrangement|
    JP3419240B2|1997-03-21|2003-06-23|豊田合成株式会社|Airbag pad and method of manufacturing the same|
    JPH1134777A|1997-07-01|1999-02-09|Takata Europ Vehicle Safety Technol Gmbh|Cover cap for air bag module|
    JP3430915B2|1998-04-15|2003-07-28|トヨタ自動車株式会社|Vehicle interior member having an airbag door|
    DE19829755B4|1998-07-03|2004-07-22|Daimlerchrysler Ag|Airbag device for a motor vehicle|
    US6135489A|1998-10-07|2000-10-24|Trw Vehicle Safety Systems Inc.|Tear seam for air bag module cover|
    JP2000118343A|1998-10-13|2000-04-25|Toyota Motor Corp|Instrument panel with integrated airbag door portion|
    DE29913741U1|1999-08-06|1999-12-16|Trw Automotive Safety Sys Gmbh|Cover for an airbag of a vehicle occupant restraint system|DE10162611A1|2001-12-20|2003-09-11|Opel Adam Ag|Cover for an airbag of an impact protection device for vehicle occupants|
    US7004497B2|2003-01-07|2006-02-28|General Motors Corporation|Styling flexible driver air bag module and method of making same|
    法律状态:
    2001-01-17| AS| Assignment|Owner name: TRW AUTOMOTIVE SAFETY SYSTEMS GMBH & COMPANY, GERM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DERRICK, JOHN-OLIVER;REEL/FRAME:011479/0898 Effective date: 20001129 |
    2006-03-28| FPAY| Fee payment|Year of fee payment: 4 |
    2010-05-24| REMI| Maintenance fee reminder mailed|
    2010-10-15| LAPS| Lapse for failure to pay maintenance fees|
    2010-11-15| STCH| Information on status: patent discontinuation|Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
    2010-12-07| FP| Expired due to failure to pay maintenance fee|Effective date: 20101015 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE20000956.7||2000-01-20||
    DE20000956U|DE20000956U1|2000-01-20|2000-01-20|Airbag cover with tear line|
    DE20000956||2000-01-20||
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