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WO2011087160A1 - Module de coussin de sécurité gonflable - Google Patents

Module de coussin de sécurité gonflable Download PDF

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Publication number
WO2011087160A1
WO2011087160A1 PCT/KR2010/000175 KR2010000175W WO2011087160A1 WO 2011087160 A1 WO2011087160 A1 WO 2011087160A1 KR 2010000175 W KR2010000175 W KR 2010000175W WO 2011087160 A1 WO2011087160 A1 WO 2011087160A1
Authority
WO
WIPO (PCT)
Prior art keywords
cushion
seam lines
exhaust outlet
airbag module
gas
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2010/000175
Other languages
English (en)
Inventor
Jung-Sik Ham
Hoon Choi
Jae-Man Ko
Soon-Bok Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
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 Autoliv Development AB filed Critical Autoliv Development AB
Priority to PCT/KR2010/000175 priority Critical patent/WO2011087160A1/fr
Publication of WO2011087160A1 publication Critical patent/WO2011087160A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • 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
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2342—Tear seams

Definitions

  • the present invention relates to an airbag module, and more particularly, to an airbag module capable of controlling the direction, sequence, and time of deployment of an airbag cushion to reduce impact to a body portion of a driver in the case of a vehicle collision.
  • Airbag modules for a vehicle reduces an impact of an interior object of the vehicle to a driver or passenger generated in an accident.
  • the vehicle airbag module includes an airbag module for a driver and an airbag module for a passenger.
  • the airbag module for a driver is installed in a steering wheel of a vehicle while the airbag module for a passenger is installed in an instrument panel in front of a passenger seat. To reduce a loss of lives, recently, almost all vehicles are equipped with the airbag module.
  • the airbag module is designed to deploy from the center portion of the steering wheel toward the outer circumferential portion thereof. That is, it takes more time to deploy the airbag cushion at the upper and lower portions of the steering wheel than the center portion of the steering wheel. Nevertheless, since the safety belt delays the driver's reaching the lower side of the steering wheel, there is no great difficulty completely inflating the airbag cushion.
  • the airbag cushion insufficiently inflates in the area corresponding to the lower portion of the steering wheel so that the bump between the body, particularly, the chest and the abdomen, of the driver and the lower portion of the steering wheel, may not be efficiently reduced.
  • a female driver may be damaged further more in a portion between the chest and the abdomen.
  • a passenger who sits close to the airbag module for a passenger seat may be damaged due to a suddenly inflated airbag cushion.
  • a method of folding an airbag cushion in a predetermined manner and a method of installing a deflector in an airbag cushion have been suggested.
  • the folding method since the airbag cushion is manually folded, the manufacturing time and costs increase and a difference in the initial forward deployment restriction performance of the airbag cushion is generated according to the quality of folding.
  • the deflector installation method the manufacturing costs and the weight of an airbag module increase.
  • the airbag module is designed such that in the case of a collision a portion of an airbag corresponding to the center portion of the steering wheel is inflated first and followed by an outer portion.
  • the impact time between a body portion of the driver and the steering wheel might be very short depending on the driver's posture, and thus, the gas injection pressure needs to be increased so that the airbag cushion can deploy quickly. Accordingly, a higher impact may be applied to the driver's head by the deployment pressure of the airbag cushion.
  • the present invention provides an airbag module which can quickly deploy a cushion in an area corresponding to the lower portion of a steering wheel so that a damage to a driver who did not wear a safety belt. Furthermore, the present invention provides an airbag module which can reduce the head impact of a driver due to the sudden deployment of an airbag cushion.
  • an airbag module comprises (i) a gas generator generating a high pressure gas and ejecting the gas through an exhaust outlet in a vehicle collision, (ii) a cushion adapted to be filled with the the ejected gas and having at least two seam lines formed on the cushion using thread in order to form a path through the ejected gas proceeds, (iii) a housing accommodating the cushion, and (iv) a cover covering the cushion accommodated in the housing.
  • the direction, order, and time of deployment of the cushion can depend upon the the seam lines.
  • At least a portion of the seam lines may be configured to be torn after the ejected gas is at least partly guided through the path.
  • at least a portion of the seam lines may be configured to be torn after the ejected gas is fully guided through the path.
  • the seam lines can be formed to allow the upper and lower portions of the cushion to deploy sooner than any other portions of the cushion.
  • the seam lines can be formed to divide the ejected gas substantially into halves of a gas flowing toward the upper portion of the cushion and a gas flowing toward the lower portion of the cushion.
  • the seam lines can be formed substantially linearly and vertically on the plane and include a pair of first seam lines that are substantially symmetrical with respect to the exhaust outlet and a pair of second seam lines that are formed outside the first seam lines and are substantially symmetrical with respect to the exhaust outlet.
  • the seam lines can formed such that the amount of the gas flowing from the exhaust outlet toward the lower portion of the cushion is greater than that of the gas flowing from the exhaust outlet toward the upper portion of the cushion.
  • the seam lines comprise a pair of first seam lines substantially symmetrically formed with respect to the exhaust outlet such that an interval between the first seam lines increases from the upper portion of the cushion toward the lower portion of the cushion; and a pair of second seam lines substantially symmetrically formed with respect to the exhaust outlet, outside the first seam lines, such that an interval between the first seam lines increases further than the first seam lines from the upper portion of the cushion toward the lower portion of the cushion.
  • the seam lines can be formed such that the ejected gas flows in three directions including a direction toward the lower portion of the cushion and the amount of the gas flowing from the exhaust outlet toward the lower portion of the cushion is the largest among the gases flowing from the exhaust outlet in the three directions.
  • the seam lines comprise three seam lines formed non-linearly with respect to the exhaust outlet on the plane, and a downward path for the gas from the exhaust outlet formed by a pair of two of the three seam lines is wider than the other two paths formed by the other two pairs of the other two seams lines.
  • Sewn portions of the first seam lines are torn sooner than sewn portions of the second seam lines by the gas generated by the gas generator and exhausted through the exhaust outlet.
  • a breaking strength of the seam lines is adjusted to control a cushion deployment time. For example, if the seam line breaking strength is low, thread of the seam line is quickly torn so that a cushion deployment time is shortened.
  • Sewn portions of the seam lines are sewn to be simultaneously torn at a predetermined pressure.
  • sewn portions of the seam lines are sewn to be gradually removed at a predetermined pressure that gradually increases.
  • the cushion can comprises a front cushion and a rear cushion facing each other, and wherein the at least two seam lines are formed by sewing portions of the front cushion and the rear cushion so as to form a path through the ejected gas proceeds in at least one direction in a virtual plane within the cushion that is overall perpendicular to a first direction, wherein the first direction is an initial ejection direction of the gas generated by the gas generation unit.
  • the at least two seam lines can be formed radially around the exhaust outlet, in a plane where the cushion is unfolded to roughly make a circle around the exhaust outlet.
  • the at least two seam lines can form eight gas paths in radial directions around the exhaust outlet.
  • the at least two seam lines can be horizontally extended in parallel in a plane where the cushion is unfolded to roughly make a circle around the exhaust outlet.
  • the at least two seam lines can be vertically extended in parallel in a plane where the cushion is unfolded to roughly make a circle around the exhaust outlet.
  • the at least two seam lines have circular shapes with different radiuses around the exhaust outlet in a plane where the cushion is unfolded to roughly make a circle around the exhaust outlet.
  • a damage to a driver generated as the driver bumps against the lower portion of the steering wheel can be reduced.
  • an impact to the body, in particular, a portion between the chest and the pelvis, of a driver who does not fasten a safety belt or is out of position by the lower portion of the steering wheel can be reduced.
  • an airbag cushion corresponding to the center or the upper portion of the steering wheel is prevented from suddenly deploying, thereby reducing the head impact of the driver due to the deployment pressure of the airbag cushion.
  • FIG. 1 illustrates the positions of a body portion of a driver before and after a vehicle collision
  • FIGS. 2 through 5 are images sequentially showing the deployment of an airbag cushion of a conventional airbag module
  • FIGS. 6 illustrages the positions of a body portion of a driver before and after a vehicle collision
  • FIG. 7 is a cross-sectional view of an airbag module according to an embodiment of the present invention.
  • FIG. 8 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to an embodiment of the present invention
  • FIG. 9 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to another embodiment of the present invention.
  • FIG. 10 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 11 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIGS. 12 through 15 are images sequentially showing the deployment of an airbag cushion of an airbag module according to an embodiment of the present invention.
  • FIGS. 16 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 17 is a side view of a gas generation unit and the cushion of FIG. 7 at the initial stage of deployment of the airbag cushion illustrated in FIG. 15;
  • FIGS. 18 through 20 are schematic views illustrating a deployment order of the airbag cushion illustrated in FIG. 16;
  • FIG. 21 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 22 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 23 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 24 is a plan view of a cushion of the airbag module of FIG. 7 that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 25 is a plan view illustrating an airbag cushion that is unfolded to roughly make a circle around an exhaust outlet, according to yet another embodiment of the present invention.
  • FIG. 26 is a side view of a gas generation unit and the airbag cushion of FIG. 16 at the initial stage of deployment of the airbag cushion illustrated in FIG. 25;
  • FIGS. 27 through 29 are schematic views illustrating a deploying order of the airbag cushion illustrated in FIG. 25.
  • FIG. 7 is a cross-sectional view of an airbag module according to an embodiment of the present invention.
  • An airbag module according to the present embodiment includes a gas generator 30, a cushion 40, a housing 10, and a cover 20.
  • the housing 10 may be fixed to a vehicle and accommodates the cushion 40.
  • the gas generator 30 is installed in the rear of the housing 10. When an impact of over a predetermined amount is generated due to a collision, a high pressure gas is instantly generated by the gas generator 30 and ejected through an exhaust outlet 30a.
  • the gas generator 30 may be accommodated in the housing 10 as shown in FIG. 7. However, the gas generator 30 may not be accommodated in the housing 10.
  • the cover 20 is installed at the front side of the housing 10 and accommodates the cushion 40 and the gas generator 30 with the housing 10. However, the gas generator 30 may not be accommodated by the cover 20 and the housing 10.
  • the cushion 40 is connected to the lower portion of the housing 10. In a vehicle collision, the cushion 40 is filled with the high pressure gas generated by the gas generator 30 and ejected through the exhaust outlet 30a.
  • the cushion 40 is formed of textile. Normally, the cushion 40 is accommodated in the housing 10 in a predetermined form. In a vehicle collision, as the cover 20 is removed by the ejected high pressure gas, the cushion 40 inflates toward a driver.
  • the cushion 40 is generally accommodated in the housing 10 by being folded, the present invention is not limited thereto and the folding shape may be various.
  • FIG. 8 is a plan view of the cushion 40 of the airbag module of FIG. 7 that is unfolded to roughly make a circle around the exhaust outlet 30a, according to an embodiment of the present invention.
  • the first seam lines S1 are vertically formed to be symmetrical to the exhaust outlet 30a.
  • the second seam lines S2 are vertically formed outside the first seam lines S1 to be symmetrical to the exhaust outlet 30a.
  • the length of each of the first seam lines S1 may be greater than the length of each of the second seam lines S2, the present invention is not limited thereto.
  • the first and second seam lines S1 and S2 may be substantially linear, the present invention is not limited thereto.
  • the two seam lines are formed as shown in FIG. 8, the number of the seam line pairs is not limited.
  • “vertical" means the upward or downward directions on the FIG. 8.
  • seam lines 40a and 40b are substantially circularly formed along the edge portion of the cushion 40, which results from sewing two sheets of textile overlapped to make the cushion 40.
  • the seam lines 40a, 40b, and 40c are firmly sewn such that the they are not removed by the high pressure gas in a vehicle collision.
  • Each of the seam lines S1 and S2 is a portion where the sheets of textile forming the cushion 40 facing each other are sewn using thread. Accordingly, the seam lines S1 and S2 prevent the entrance of gas before they are torn. As a result, two seam lines, for example, the pair of first seam lines S1, forms a path through which the gas passes.
  • the gas generated by the gas generator 30 and ejected through the exhaust outlet 30a is divided substantially into halves and spreads out toward the upper and lower portions of the cushion 40 along the path formed by the first seam lines S1.
  • the seam line determines the direction of the deployment of the cushion 40. For example, when the seam lines are formed vertically and substantially linearly, the initial deployment directions of the cushion 40 are upward and downward.
  • the upper and lower portions of the cushion 40 are first deployed.
  • the thread of the first seam lines S1 is torn.
  • the high pressure gas spreads out to the left and right sides of the cushion 40 so that the left and right portions of the cushion 40 are deployed.
  • the time for the cushion 40 to deploy to the left and right directions may be controlled by the amount of the critical pressure at which the thread of the first seam lines S1 is torn. For example, when the critical pressure is low, that is, the strength of the thread of the first seam lines S1, is low, less time is taken for the cushion 40 to deploy in the left and right directions. However, when the critical pressure is too low, since the cushion 40 is deployed in the left and right directions before the cushion 40 is sufficiently deployed in the up and down directions, the critical pressure at which the first seam lines S1 are removed should be set appropriately.
  • the cushion 40 is further deployed in the left and right directions.
  • the critical pressure at which the second seam lines S2 are torn may be the same as, or greater or less than the pressure at which the first seam lines S1 are torn.
  • the time for the cushion 40 to deploy in the left and right directions decreases. The order of the deployment of the cushion 40 is adjusted from the upward and downward directions to the left and right directions by the first and second seam lines S1 and S2.
  • FIGS. 12-15 are images sequentially showing the deployment of the cushion 40 of an airbag module installed in an actual vehicle, according to an embodiment of the present invention.
  • FIG. 13 is compared with FIG. 3 at the same time point, it can be seen that the cushion 40 is deployed more quickly.
  • the damage to a driver by the lower portion of the steering wheel 1 can be reduced.
  • an impact to the body, in particular, a portion between the chest and the pelvis, of a driver who does not wear a safety belt by the lower portion of the steering wheel 1 can be reduced.
  • a plurality of exhaust holes 41 may be formed in the cushion 40.
  • the exhaust holes 41 are small vent holes through which the high pressure gas is exhausted to reduce the impact or damage of the cushion 40 that may be generated as too much amount of the gas is ejected when the cushion 40 is suddenly deployed by the high pressure gas.
  • the arrangement and number of the exhaust air 41 may be changed diversely.
  • FIG. 9 is a plan view of a cushion 140 of the airbag module of FIG. 7 that is unfolded to roughly make a circle around the exhaust outlet 30a, according to another embodiment of the present invention.
  • a pair of first seam lines S11 and a pair of second seam lines S12 are formed on the cushion 140.
  • the first seam lines S11 are formed symmetrically with respect to the exhaust outlet 30a such that an interval between the first seam lines S11 increases from the upper portion of the cushion 140 toward the lower portion of the cushion 140.
  • the second seam lines S12 are also formed outside the first seam lines S11 and symmetrically with respect to the exhaust outlet 30a such that an interval between the second seam lines S12 increases from the upper portion of the cushion 140 toward the lower portion of the cushion 140.
  • each of the first seam lines S11 may be greater than that of each of the second seam lines S12, the present invention is not limited thereto.
  • first and second seam lines S11 and S12 may be substantially linear, they may be curves and the present invention is not limited thereto.
  • the upper portion of the cushion 140 is blocked by the first seam lines S11, part of the gas ejected through the exhaust outlet 30a flows upward while most gas flows downward. That is, since the amount of gas generated by the gas generator 30, ejected through the exhaust hole 30a, and flowing downward is greater than the amount of the gas flowing upward, the lower portion of the cushion 140 is first deployed at the initial stage of a collision. Then, as thread of the first seam lines S11 is torn, the gas flows in a space sectioned by the second seam lines S12 of the cushion 140 to deploy a portion of the cushion 140 corresponding to the sectioned portion. Finally, as thread of the second seam lines S12 is torn, all portions of the cushion 140 are completely deployed.
  • the first and second seam lines S11 and S12 control not only the order of the deployment of the cushion 140 but also the direction of the deployment of the cushion 140. Also, the time of the deployment of the cushion 140 may be controlled by adjusting the critical pressure at which the threads of the first and second seam lines S11 and S12 are torn. In the embodiments shown in FIGS. 8 and 9, the threads of the first seam lines S1 and S11 are respectively designed to be torn sooner than those of the second seam lines S2 and S12 respectively.
  • the lower portion of the cushion 140 is first deployed and then the left, right and upper portions of the cushion 140 are deployed later.
  • a damage to a driver generated as the driver bumps against the lower portion of the steering wheel 1 can be reduced.
  • an impact to the body, in particular, a portion between the chest and the pelvis, of a driver who does not wear a safety belt by the lower portion of the steering wheel 1 can be reduced.
  • FIG. 10 is a plan view of a cushion 240 of the airbag module of FIG. 7 that is unfolded to roughly make a circle around the exhaust outlet 30a, according to yet another embodiment of the present invention.
  • first through third seam lines S21, S22, and S23 are formed on the cushion 240.
  • the first seam line S21 guides the gas generated by the gas generator 30 and ejected through the exhaust outlet 30a to flow toward the lower portion and the upper right portion of the cushion 240.
  • the second seam line S22 guides the gas generated by the gas generator 30 and ejected through the exhaust outlet 30a to flow from the exhaust outlet 30a toward the lower portion and the upper left portion of the cushion 240.
  • the third seam line S23 guides the gas generated by the gas generator 30 and ejected through the exhaust outlet 30a to flow from the exhaust outlet 30a toward the upper left and upper right portions of the cushion 240.
  • the downward path for the gas from the exhaust outlet 30a formed by the seam lines S21 and S22 is wider than either the upper right path for the gas from the exhaust outlet 30a formed by the seam lines S21 and S23 or the upper left path for the gas from the exhaust outlet 30a formed by the seam lines S22 and S23. Therefore, the amount of the gas flowing through the downward path is greater than that of the gas flowing through the upper right path or the upper left path.
  • the amounts of the gases flowing toward the upper left portion and the upper right portion of the cushion 240 are substantially the same.
  • each of the first and second seam lines S21 and S22 may be greater than that of the third seam line S23, the present invention is not limited thereto.
  • each of the first through third seam lines S21, S22, and S23 may be a curve or a crooked straight line, the present invention is not limited thereto.
  • the lower portion of the cushion 240 is most deployed at the initial stage and then the upper left and upper right portions of the cushion 240 are deployed.
  • the threads of the first through third seam lines S21, S22, and S23 are torn, all portions of the cushion 240 are completely deployed.
  • FIG. 11 is a plan view of a cushion 340 of the airbag module of FIG. 7 that is unfolded to roughly make a circle around the exhaust outlet 30a, according to yet another embodiment of the present invention.
  • a pair of first seam lines S31, a pair of second seam lines S32, and a third seam line S33 are formed on the cushion 340.
  • the first seam lines S31 are vertically formed to be substantially symmetrical with respect to the exhaust outlet 30a.
  • the second seam lines S32 are vertically formed outside the first seam lines S31 and to be substantially symmetrical with respect to the exhaust outlet 30a.
  • the first and second seam lines S31 and S32 may be substantially linear, the present invention is not limited thereto.
  • the third seam line S33 is formed above the exhaust outlet 30a at a position substantially blocking a gas flow path made by the first and second seam lines S31 and S32.
  • the third seam line S33 may be substantially curved or linear, the present invention is not limited thereto.
  • FIG. 8 illustrates two seam lines S31 and S32 are formed in a vertical direction, the number of the seam lines in the vertical direction is not limited.
  • the lower portion of the cushion 340 is first deployed in a vehicle collision.
  • the left and right portions of the cushion 340 are deployed and finally the upper portion of the cushion 340 is deployed, thus completing the deployment of the cushion 340.
  • the direction and order of the deployment of the cushion 340 may be changed according to the order that the threads of the seam lines are torn.
  • the above-described critical pressure values at which the threads of the seam lines are torn are set to control the direction, order, and time of the deployment of the cushion 340.
  • the seam lines can be sewn to be simultaneously removed at a predetermined pressure or sequentially removed at a predetermined increasing pressure.
  • the order and time of the deployment of the cushion 340 can be controlled.
  • FIG. 16 is a plan view of the cushion 440 of the airbag module that is unfolded to roughly make a circle around the exhaust outlet 30a, according to yet another embodiment of the present invention.
  • the cushion 440 includes a first seam line S41, a second seam line S42, a third seam line S43, a fourth seam line S44, a fifth seam line S45, a sixth seam line S46, a seventh seam line S47, and an eighth seam line S48.
  • the first through eighth seam lines S41 through S48 are formed by sewing the front cushion 441 and the rear cushion 442.
  • the first through eighth seam lines S41 through S48 are formed radially around the exhaust outlet 30a.
  • Two adjacent seam lines form a gas path through which gas ejected through the exhaust outlet 30a is spread.
  • the first and second seam lines S41 and S42 form a path to the right side
  • the third and fourth seam lines S43 and S44 form a path in a downward direction
  • the fifth and sixth seam lines S45 and S46 form a path to the left side
  • the seventh and eighth seam lines S47 and S48 form a path in an upward direction.
  • a gas generated by the gas generation unit 30 initially proceeds in a first direction, and then is spread out radially in a plane that is overall perpendicular to the first direction by the first through eighth seam lines S41 through S48. That is, until the first through eighth seam lines S41 through S48 are torn, the cushion 440 is deployed radially on the plane that is overall perpendicular to the first direction.
  • FIG. 17 is a side view of the cushion 440 after the first through eighth seam lines S41 through S48 are torn.
  • a virtual line T1 corresponds to end portions of the first seam line S41 and the sixth line S46
  • a virtual line T2 corresponds to end portions of the second seam line S42 and the fifth seam line S45
  • a virtual line T3 corresponds to end portions of the seventh seam line S47 and the eighth seam line S48
  • a virtual line T4 corresponds to end portions of the third seam line S43 and the fourth seam line S44.
  • the first through eighth seam lines S41 through S48 are torn.
  • the first through eighth seam lines S41 through S48 are designed to be torn when a predetermined pressure is reached.
  • Portions of the cushion 440 along the virtual lines T1 and T2 corresponding to the end portions of the first and second seam lines S41 and S42 are slim, and portions of the cushion 440 between the virtual lines T1 and T2 are bulge.
  • FIGS. 18 through 20 are schematic views illustrating a deployment order of the cushion 440 illustrated in FIG. 16.
  • Gas generated by the gas generation unit 30 is spread out in a direction approximately perpendicular to the first direction such that the cushion 440 is sufficiently deployed in the same direction, and immediately after the first through eighth seam lines S41 through S48 are torn, the cushion 440 may be deployed as illustrated in FIG. 18. As the amount of injected gas increases, portions of the cushion 440 corresponding to the torn seam lines are inflated suddenly, and the cushion 440 may be inflated overall as illustrated in FIG. 12B. Then, when all of the provided gas is injected, the cushion 440 may be completely deployed in the first direction as illustrated in FIG. 20.
  • the cushion 440 of the airbag module according to the current embodiment of the present invention is deployed first radially in the plane that is overall perpendicular to the first direction, that is, approximately in a plane similar to a plane of the steering wheel. Then, as the first through eighth seam lines S41 through S48 are torn, all of the portions of the cushion 440 are inflated in the first direction, thereby being deployed a second time. That is, the cushion 440 is deployed in two steps, and during the second step, all portions of the cushion 440 are uniformly deployed, and thus, concentration of a gas injection pressure in the portions of the cushion 440 corresponding to the center or upper portion of the steering wheel is prevented. Accordingly, even when the driver's head hits these portions, the impact applied to the head may be reduced.
  • the first through eighth seam lines S41 through S48 determine the deployment direction, order, and time of the cushion 440 due to the gas ejected through the exhaust outlet 30a.
  • the cushion 440 is deployed radially in the plane perpendicular to the first direction.
  • the deployment order the cushion 440 is first deployed radially in the plane approximately perpendicular to the first direction, and then after the first through eighth seam lines S41 through S48 are torn, the cushion 440 is deployed in the first direction.
  • the deployment time of the cushion 440 may be adjusted by adjusting the time instants when the first through eighth seam lines S41 through S48 are torn.
  • FIGS. 21 through 25 are modified embodiments of the cushion 440 of the airbag module in FIG. 16.
  • a cushion 540 illustrated in FIG. 21 is different from the cushion 440 of FIG. 16 in that first through fifth seam lines S51, S52, S53, S54 and S55 are horizontally extended. At the initial stage, the cushion 540 is deployed first in left and right directions, and then in upward and downward directions.
  • the order in which each of the first through fifth seam lines S51, S52, S53, S54 and S55 is torn may be set variously.
  • the strength of a thread for forming the first through fifth seam lines S51, S52, S53, S54 and S55 may also vary.
  • a cushion 640 illustrated in FIG. 22 is different from the cushion 440 of FIG. 16 in that first through fifth seam lines S61, S62, S63, S64, and S65 are vertically extended.
  • the cushion 640 is deployed first in upward and downward directions around an exhaust outlet 30a, and then in left and right directions.
  • the order in which each of first through fifth seam lines S61, S62, S63, S64, and S64 is torn may be set variously.
  • the strength of a thread for forming first through fifth seam lines S61, S62, S63, S64, and S65 may also vary.
  • a cushion 740 illustrated in FIG. 23 is different from the cushion 440 of FIG. 16 in that first and second seam lines S71 and S72 have circular shapes of different sizes.
  • first and second seam lines S71 and S72 have circular shapes of different sizes.
  • a portion of the cushion 740 close to an exhaust outlet 30a is deployed first, and then as the first seam line S71 is torn, another broader portion of the cushion 740 is deployed. Then, as the second seam line S72 is torn, the cushion 340 is deployed completely.
  • the order in which each of the first and second seam lines S71 and S72 is torn may be set variously.
  • the strength of a thread for forming the first and second seam lines S71 and S72 may also vary.
  • First through third seam lines S81, S82, and S83 of an cushion 840 illustrated in FIG. 24 are identical to the combination of the seam lines of the cushion 440 of FIG. 16 and the cushion 740 of FIG. 23.
  • the cushion 840 is deployed radially around an exhaust outlet 30a due to the third seam line S83.
  • the first seam line S81 is torn and the cushion 840 is deployed over a broader surface accordingly, and finally, the second seam line S82 is torn, thereby completely deploying the cushion 840.
  • the third seam line S83 may be torn after the first and second seam lines S81 and S82 are torn, but the present invention is not limited thereto, and the order in which the third seam line S83 is torn may be set variously.
  • FIG. 25 is a plan view illustrating a cushion 940 that is unfolded to roughly make a circle around an exhaust outlet 30a, according to yet another embodiment of the present invention.
  • the cushion 940 includes a first seam line S91, a second seam line S92, and a third seam line S93.
  • the first and second seam lines S91 and S92 are disposed parallel to each other in a downward direction of the exhaust outlet 30a, thereby forming a path in the downward direction of the exhaust outlet 30a.
  • the third seam line S93 is disposed to roughly surround the exhaust outlet 30a, thereby forming a path that divides a gas ejected in the downward direction into two equal amounts respectively flowing in an upward direction.
  • the gas generated by a gas generation unit proceeds in a downward direction in a virtual plane that is substantially perpendicular to the first direction along a gas path formed by the first and second seam lines S91 and S92, and then is spread out in left and right directions within the cushion 940 and then in an upward direction.
  • a lower portion of the cushion 940 corresponding to a lower portion of the steering wheel that may hit the driver's abdomen is first deployed and then the two side portions and the upper portion of the cushion 940 are deployed.
  • first through third seam lines S91, S92, and S93 may be either torn or not torn during the deployment of the cushion 940.
  • a front cushion 941 is inflated overall.
  • the cushion 940 is inflated in two steps, and thus a pressure during the inflation of the cushion 940 is distributed and the impact to the driver's head may be reduced accordingly.
  • the cushion 940 is first inflated by the gas ejected through the exhaust outlet 30a in a downward direction and then along both sides of the cushion 940 in an upward direction, and then the cushion 940 is inflated overall a second time toward the driver in the first direction as the first through third seam lines S91, S92, and S93 are torn.
  • first and second seam lines S91 and S92 may be torn at or after a predetermined pressure, but the third seam line S93 may not be torn.
  • FIG. 26 is a side view of the gas generation unit and the cushion 940 of FIG. 25 at the initial stage of deployment. Referring to FIG. 26, a lower portion of the cushion 940 is first deployed and then an upper portion of the cushion 940 is deployed. Accordingly, in addition to the above-described advantages, a sudden impact of the steering wheel against the driver's abdomen in a vehicle collision in the case when the driver does not wear the safety belt may be prevented.
  • FIGS. 27 through 29 are schematic views illustrating an order that the cushion 940 illustrated in FIG. 25 is deployed.
  • gas ejected from the gas generation unit 30 is spread out in a downward direction that is approximately perpendicular to the first direction and thus the cushion 940 is deployed from a lower portion to an upper portion. Then, as illustrated in FIG. 28, the cushion 940 is deployed in all directions in a plane that is approximately perpendicular to the first direction. Afterwards, as illustrated in FIG. 29, the cushion 940 is deployed in the first direction, thereby completing the deployment.
  • the cushion 940 of the airbag module according to the current embodiment is deployed sequentially from a lower portion to an upper portion in the plane that is overall perpendicular to the first direction at the initial stage of a vehicle collision.
  • the deployment of the cushion 940 toward the driver takes place during this stage, and thus the deployment pressure in the first direction may be reduced, and the impact to the driver's head may be reduced accordingly.
  • the first through third seam lines S91, S92, and S93 determine the deployment direction, order, and time of the cushion 940 that is deployed by the gas ejected through the exhaust outlet 30a.
  • the gas is ejected in a downward direction by the first and second seam lines S91 and S92, and then in left and right directions by the third seam line S93, and finally in an upward direction.
  • the deployment order a lower portion of the cushion 940 is first deployed, followed by two side portions thereof, and an upper portion thereof.
  • the deployment time of the cushion 940 may be adjusted in consideration of tearing of the first through third seam lines S91, S92, and S93.
  • the deployment time of the cushion 940 may be adjusted by varying the time instants when the first through third seam lines S91, S92, and S93 tear.
  • the present invention can also be applied to an airbag module installed in an instrument panel at a passenger seat.
  • the displacement and shape of the seam lines formed in the cushion can be modified accordingly.
  • the displacement and shape of the seam lines formed in the cushion can be designed such that the cushion can deploy in a region with which a body portion of the passenger collides.
  • the displacement and shape of the seam lines can be designed such that the cushion should not deploy toward the passenger but deploy circumferentially.
  • the present invention can be used in an industry in which airbag modules and all sorts of vehicles employing the airbag modules are manufactured and used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention porte sur un module de coussin de sécurité gonflable comprenant un générateur de gaz générant un gaz haute pression et éjectant le gaz à travers une sortie d'échappement en cas de collision du véhicule, un coussin conçu pour être rempli avec le gaz éjecté et possédant au moins une ligne de couture formée sur le coussin à l'aide d'un fil devant être déchiré par le gaz généré par le générateur de gaz et éjecté par la sortie d'échappement, le sens, l'ordre, et la durée de déploiement du coussin dépendant des lignes de couture, sur un boîtier contenant le coussin, et sur un capot recouvrant le coussin contenu dans le boîtier.
PCT/KR2010/000175 2010-01-12 2010-01-12 Module de coussin de sécurité gonflable Ceased WO2011087160A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2010/000175 WO2011087160A1 (fr) 2010-01-12 2010-01-12 Module de coussin de sécurité gonflable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2010/000175 WO2011087160A1 (fr) 2010-01-12 2010-01-12 Module de coussin de sécurité gonflable

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WO2011087160A1 true WO2011087160A1 (fr) 2011-07-21

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WO (1) WO2011087160A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014024046A3 (fr) * 2012-06-07 2014-04-10 Zodiac Seats France Système de coussin gonflable pour avion
JP2014210521A (ja) * 2013-04-19 2014-11-13 豊田合成株式会社 車両用エアバッグ
DE102014116333A1 (de) 2014-11-10 2016-05-12 Autoliv Development Ab Airbagmodul für ein Lastkraftfahrzeug mit einem eine Entfaltungsrichtung vorgebenden Kanal aufweisenden Gassack
CN106515649A (zh) * 2016-12-15 2017-03-22 浙江吉利控股集团有限公司 非对称式安全气囊、安全气囊总成及车辆
CN114771455A (zh) * 2022-04-24 2022-07-22 重庆长安汽车股份有限公司 汽车安全气囊气袋、汽车安全气囊及车辆
WO2023030803A1 (fr) * 2021-09-03 2023-03-09 ZF Automotive Safety Germany GmbH Volant comprenant un coussin de sécurité gonflable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0614786A1 (fr) * 1993-03-11 1994-09-14 Morton International, Inc. Sac gonflable côté conducteur à déploiement contrôlé
US5683109A (en) * 1995-10-31 1997-11-04 Alliedsignal Inc. Two piece air bag with built in tether
KR100286985B1 (ko) * 1998-08-27 2001-04-16 이승복 운전석용에어백의에어쿠션
KR20100031370A (ko) * 2008-09-12 2010-03-22 아우토리브 디벨롭먼트 아베 에어백 모듈

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0614786A1 (fr) * 1993-03-11 1994-09-14 Morton International, Inc. Sac gonflable côté conducteur à déploiement contrôlé
US5683109A (en) * 1995-10-31 1997-11-04 Alliedsignal Inc. Two piece air bag with built in tether
KR100286985B1 (ko) * 1998-08-27 2001-04-16 이승복 운전석용에어백의에어쿠션
KR20100031370A (ko) * 2008-09-12 2010-03-22 아우토리브 디벨롭먼트 아베 에어백 모듈

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014024046A3 (fr) * 2012-06-07 2014-04-10 Zodiac Seats France Système de coussin gonflable pour avion
US9428132B2 (en) 2012-06-07 2016-08-30 Zodiac Seats France Aircraft airbag system
JP2014210521A (ja) * 2013-04-19 2014-11-13 豊田合成株式会社 車両用エアバッグ
DE102014116333A1 (de) 2014-11-10 2016-05-12 Autoliv Development Ab Airbagmodul für ein Lastkraftfahrzeug mit einem eine Entfaltungsrichtung vorgebenden Kanal aufweisenden Gassack
DE102014116333B4 (de) 2014-11-10 2019-02-07 Autoliv Development Ab Lenkrad eines Lastkraftfahrzeugs mit einem Gassack, der einen eine Entfaltungsrichtung vorgebenden Kanal aufweist
CN106515649A (zh) * 2016-12-15 2017-03-22 浙江吉利控股集团有限公司 非对称式安全气囊、安全气囊总成及车辆
WO2023030803A1 (fr) * 2021-09-03 2023-03-09 ZF Automotive Safety Germany GmbH Volant comprenant un coussin de sécurité gonflable
CN114771455A (zh) * 2022-04-24 2022-07-22 重庆长安汽车股份有限公司 汽车安全气囊气袋、汽车安全气囊及车辆

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