WO2013008316A1 - Gonfleur de type à sortie à deux étages pour coussin de sécurité gonflable, et dispositif de coussin de sécurité gonflable pour véhicule - Google Patents

Gonfleur de type à sortie à deux étages pour coussin de sécurité gonflable, et dispositif de coussin de sécurité gonflable pour véhicule Download PDF

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Publication number
WO2013008316A1
WO2013008316A1 PCT/JP2011/065892 JP2011065892W WO2013008316A1 WO 2013008316 A1 WO2013008316 A1 WO 2013008316A1 JP 2011065892 W JP2011065892 W JP 2011065892W WO 2013008316 A1 WO2013008316 A1 WO 2013008316A1
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WO
WIPO (PCT)
Prior art keywords
igniter
wall portion
airbag
combustion chamber
ceiling wall
Prior art date
Application number
PCT/JP2011/065892
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English (en)
Japanese (ja)
Inventor
修 深渡瀬
誠 尾関
Original Assignee
トヨタ自動車株式会社
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Filing date
Publication date
Application filed by トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to PCT/JP2011/065892 priority Critical patent/WO2013008316A1/fr
Publication of WO2013008316A1 publication Critical patent/WO2013008316A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
    • B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/263—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output
    • B60R2021/2633—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a variable source, e.g. plural stage or controlled output with a plurality of inflation levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
    • B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
    • B60R2021/2648—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder comprising a plurality of combustion chambers or sub-chambers

Definitions

  • the present invention relates to a two-stage output inflator for an airbag and an airbag apparatus for a vehicle.
  • Patent Document 1 a cylindrical housing, a partition wall provided inside the cylindrical housing, and partitioning the inside of the cylindrical housing into first and second combustion chambers, and first and second combustion chambers are disclosed.
  • a gas generator for a multistage air bag is disclosed that includes first and second gas discharge ports formed in a cylindrical housing corresponding to each.
  • JP 2001-354105 A Japanese Patent Laid-Open No. 11-59318 JP 2001-353438 A JP 2002-274316 A
  • This invention is made
  • the objective is to suppress that gas flows around from one combustion chamber to the other combustion chamber among a 1st combustion chamber and a 2nd combustion chamber.
  • Another object is to provide a two-stage output inflator for an airbag.
  • Another object of the present invention is to provide a vehicle airbag device capable of appropriately protecting a front seat occupant.
  • a two-stage output inflator for an airbag is formed at a lower peripheral wall portion formed in a cylindrical shape and a lower end portion of the lower peripheral wall portion.
  • a cup-shaped lower case having a bottom wall, a first upper peripheral wall formed with a first gas injection hole, and a first ceiling wall formed at the upper end of the first upper peripheral wall. And having an opening-side end fixed to the opening-side end of the lower case, and forming a first combustion chamber for burning the first gas generating agent with the lower case.
  • the first upper case has an inverted cup shape having a second upper peripheral wall portion formed with a second gas injection hole and a second ceiling wall portion formed at the upper end portion of the second upper peripheral wall portion.
  • the vertical direction is defined with the bottom wall portion side of the lower case as the lower side, and the second ceiling wall portion side of the second upper case as the upper side.
  • the vertical direction in a stage output type inflator is shown. Therefore, depending on the mounting position of the inflator on the vehicle, that is, the type of the vehicle airbag device to which the inflator is applied, the vertical direction of the two-stage output inflator for airbags may not match the vertical direction of the vehicle. It is possible.
  • the partition wall that divides the first combustion chamber and the second combustion chamber is formed by the first ceiling wall portion of the first upper case having an inverted cup shape. . Therefore, it is possible to suppress the gas from flowing from one combustion chamber to the other combustion chamber of the first combustion chamber and the second combustion chamber.
  • a two-stage output inflator for an airbag according to a second aspect of the present invention is provided in the first combustion chamber in the two-stage output inflator for an airbag according to the first aspect of the present invention, and the first combustion
  • the upper wall portion of the first inner cylinder member is The first upper case can be positioned with respect to the lower case by contacting the first ceiling wall.
  • the second upper case can be positioned with respect to the first upper case by bringing the upper wall portion of the two inner cylindrical members into contact with the second ceiling wall portion.
  • the first ceiling wall portion of the first upper case need not be subjected to press fitting or the like as in the prior art, and can be formed thick. Therefore, deformation of the first ceiling wall can be suppressed by forming the first ceiling wall to be thick. Thereby, the sealing performance between the inner peripheral surface of the hole part formed in the 1st ceiling wall part and the outer peripheral surface of the 2nd inner cylinder member penetrated by this hole part is securable.
  • the two-stage output inflator for an airbag according to the third aspect of the present invention is the second-stage output inflator for an airbag according to the first aspect or the second aspect of the present invention. It further includes a case fixing portion that protrudes toward the ceiling wall portion and is fitted with an opening-side end portion of the second upper case.
  • this two-stage output inflator for an airbag by fitting the end portion on the opening side of the second upper case to the case fixing portion protruding from the first ceiling wall portion to the second ceiling wall portion side
  • the second upper case can be fixed in a state of being positioned on the first upper case.
  • a two-stage output inflator for an airbag according to a fourth aspect of the present invention is the two-stage output inflator for an airbag according to any one of the first to third aspects of the present invention, which is accommodated in the first combustion chamber. And a first filter formed in an annular shape extending along the first upper peripheral wall portion and sandwiched between the bottom wall portion and the first ceiling wall portion, and housed in the second combustion chamber And a second filter formed in an annular shape extending along the second upper peripheral wall portion and sandwiched between the first ceiling wall portion and the second ceiling wall portion.
  • the first filter is sandwiched between the bottom wall portion and the first ceiling wall portion of the lower case, so that the first filter is placed in the lower case and the first upper case.
  • the second filter can be easily assembled to the first upper case and the second upper case by sandwiching the second filter between the first ceiling wall and the second ceiling wall.
  • a two-stage output inflator for an airbag according to a fifth aspect of the present invention is the two-stage output inflator for an airbag according to the fourth aspect of the present invention, wherein the first filter is protruded from the first ceiling wall. And at least one of the second filters further includes a filter fixing portion into which an end portion on the first ceiling wall portion side is fitted.
  • the end on the first ceiling wall portion side of at least one of the first filter and the second filter is fitted into the filter fixing portion protruding from the first ceiling wall portion.
  • An airbag two-stage output inflator is the airbag two-stage output inflator according to the fourth aspect or the fifth aspect of the present invention, wherein It further includes a fixing portion that protrudes toward the ceiling wall portion and is fitted with an end portion of the second filter on the second ceiling wall portion side.
  • the end on the second ceiling wall portion side of the second filter is fitted to the fixed portion protruding from the second ceiling wall portion to the first ceiling wall portion side.
  • the second filter can be fixed in a state of being positioned on the first upper case and the second upper case.
  • the two-stage output inflator for an airbag according to the seventh aspect of the present invention is the two-stage output inflator for an airbag according to any one of the first to fifth aspects of the present invention, wherein the second combustion chamber comprises: The output is set to be lower than that of the first combustion chamber.
  • the second combustion chamber is set to have a lower output than the first combustion chamber. Therefore, the height of the second combustion chamber can be made lower than when the second combustion chamber is set to have a higher output than the first combustion chamber.
  • the dimension from the attachment part to the second ceiling wall part can be reduced. That is, the air bag two-stage output inflator can be reduced in size in the axial direction.
  • a vehicle airbag apparatus configured to ignite an airbag that is inflated and deployed toward a front seat occupant upon supply of gas, and the first explosive charge.
  • a second-stage output inflator for an airbag according to a seventh aspect of the present invention comprising: a first igniter that performs operation; a second igniter that ignites the second transfer charge; and a vehicle that supplies gas to the airbag.
  • the airbag is inflated and deployed, and it is determined that the collision speed is equal to or higher than the second threshold based on the signal output from the deceleration sensor, and the front seat occupant is wearing the seat belt.
  • Seat belt depending on the presence or absence
  • the first igniter is activated to inflate and deploy the airbag
  • the deceleration sensor outputs
  • it is determined that the collision speed is greater than or equal to the second threshold value based on the received signal and it is determined that the front seat occupant is not wearing a seat belt based on the signal output from the seat belt switch.
  • a control unit that operates the first igniter and the second igniter to inflate and deploy the airbag.
  • the control unit determines the collision speed before determining whether or not the seat belt is worn, and when the collision speed is not less than the first threshold value and less than the second threshold value, The air bag is inflated and deployed by operating the second igniter without determining whether or not the seat belt is worn. Therefore, for example, the processing function of the control unit can be simplified as compared with the case of determining whether or not the seat belt is worn before determining the collision speed, so that the start of airbag deployment can be accelerated. .
  • the second igniter is activated and the airbag is inflated and deployed at a low pressure.
  • the first igniter is activated and the airbag is inflated and deployed at medium pressure.
  • the first igniter and the second igniter are activated to inflate and deploy the airbag at a high pressure. Therefore, since the airbag is inflated and deployed at an appropriate pressure according to the collision speed and whether or not the seat belt is worn, the front seat occupant can be appropriately protected.
  • a vehicle airbag apparatus includes an airbag that is inflated and deployed toward a front seat occupant upon receipt of gas, and the first explosive charge.
  • a second-stage output inflator for an air bag according to a seventh aspect of the present invention comprising: a first igniter that ignites the gas; and a second igniter that ignites the second transfer charge; When it is determined that the collision speed is greater than or equal to the first threshold value and less than the second threshold value based on a signal output from the deceleration sensor according to the deceleration of the vehicle during a frontal collision of the vehicle, the second igniter The airbag is inflated and deployed, and it is determined that the collision speed is greater than or equal to the second threshold based on the signal output from the deceleration sensor, and the size of the physique of the front seat occupant Depending on the size, it is output from the physique sensor When it is determined that the size of the front seat occupant is less than a reference value based on the
  • the other of the first igniter and the second igniter is operated to inflate and deploy the airbag, and based on the signal output from the deceleration sensor, it is determined that the collision speed is greater than or equal to the second threshold value.
  • the first igniter and the second igniter A control unit for inflating and deploying the airbag by operating the other of the first igniter and the second igniter after a delay time longer than the predetermined delay time has elapsed after activating one. I have.
  • the control unit determines the collision speed before determining the size of the front seat occupant, and when the collision speed is not less than the first threshold and less than the second threshold. Operates the second igniter to inflate and deploy the airbag without judging the size of the front seat occupant. Therefore, for example, the processing function of the control unit can be simplified as compared with the case where the size of the front seat occupant is determined before the collision speed is determined. Can do.
  • the first igniter and the second igniter are operated, and the airbag is operated at a higher pressure than when the collision speed is equal to or higher than the first threshold and lower than the second threshold. Is expanded. Furthermore, when the collision speed is equal to or higher than the second threshold and the size of the front seat occupant is greater than or equal to the reference value, the first seat occupant size is less than the reference value. A long delay time is set from when one of the igniter and the second igniter is activated until the other is activated.
  • an airbag in a higher pressure state is set by setting a longer delay time for an occupant with a large physique, which takes time until the passenger sits behind the vehicle and is restrained by the airbag as compared to an occupant with a small physique. Can restrain a large occupant. As a result, the front seat occupant can be appropriately protected according to the collision speed and the size of the physique.
  • the vehicle airbag apparatus is the vehicle airbag apparatus according to the ninth aspect of the present invention, wherein the control unit collides based on a signal output from the deceleration sensor. It is determined that the speed is greater than or equal to the second threshold, and based on a signal output from the physique sensor, the size of the physique of the front seat occupant is determined to be less than a reference value and the front seat
  • the first igniter and the second igniter After a certain delay time has elapsed after actuating one of the first igniter, the other of the first igniter and the second igniter is actuated to inflate and deploy the airbag, and from the deceleration sensor
  • the collision speed is determined to be greater than or equal to the second threshold based on the applied signal, and the size of the physique of the front seat occupant is greater than
  • one of the first igniter and the second igniter is operated. After that, after a delay time longer than the predetermined delay time has elapsed, the other of the first igniter and the second igniter is operated to inflate and deploy the airbag.
  • the size of the front seat occupant is greater than or equal to the reference value on the condition that the seat belt is not worn.
  • the delay time is set longer after one of the first igniter and the second igniter is activated than when the size of the front seat occupant is less than the reference value.
  • the vehicle airbag device is the vehicle airbag device according to the tenth aspect of the present invention, wherein the control unit determines that the collision speed is equal to or higher than the second threshold value.
  • the first igniter and the second ignition are determined more than when the front seat occupant is determined not to be wearing a seat belt.
  • the delay time from when one of the devices is activated until the other is activated is set to be long.
  • the vehicle airbag device when the collision speed is equal to or higher than the second threshold, when the front seat occupant is wearing the seat belt, than when the front seat occupant is not wearing the seat belt, the delay time from when one of the first igniter and the second igniter is activated until the other is activated is set to be long. Thereby, even when it takes time to be restrained by the airbag by wearing the seat belt, the front seat occupant can be appropriately protected.
  • the gas is prevented from flowing from one combustion chamber to the other combustion chamber of the first combustion chamber and the second combustion chamber. be able to.
  • the front seat occupant can be appropriately protected.
  • FIG. 9 It is a block diagram which shows the whole structure of the vehicle airbag apparatus which concerns on the 2nd application example to which the inflator shown by FIG. 1 was applied. It is a flowchart explaining operation
  • the inflator 10 shown in FIG. 1 is an example of a two-stage output inflator for an airbag according to the present invention.
  • the inflator 10 includes a lower case 12, a first upper case 14, and a second upper case 16.
  • the lower case 12 has a cup shape having a lower peripheral wall portion 12A formed in a cylindrical shape and a bottom wall portion 12B formed at a lower end portion of the lower peripheral wall portion 12A.
  • Mounting holes 12C and 12D penetrating in the thickness direction are formed on both sides of the bottom wall portion 12B with the center portion therebetween.
  • the first upper case 14 has an inverted cup shape having a first upper peripheral wall portion 14A formed in a cylindrical shape and a first ceiling wall portion 14B formed at the upper end portion of the first upper peripheral wall portion 14A. Yes. An opening end 12E of the lower case 12 is inserted inside the opening end 14C of the first upper case 14, and the end 12E and the end 14C are fitted to each other. ing.
  • both the end portions 12E and 14C are further joined by, for example, laser welding in a state of being fitted to each other.
  • the first upper case 14 and the lower case 12 form a first combustion chamber 18.
  • a first gas generating agent 20 is accommodated in the first combustion chamber 18.
  • first gas injection holes 14D are formed in the above-described first upper peripheral wall portion 14A in the circumferential direction.
  • a flange-shaped attachment portion 14 ⁇ / b> E extending toward the radially outer side of the first upper case 14 is formed at the opening-side end portion 14 ⁇ / b> C of the first upper case 14.
  • the attachment portion 14E is for attachment to a vehicle body (not shown).
  • the first ceiling wall portion 14B is formed with a fitting portion 14F at a position eccentric from the center portion.
  • the fitting portion 14F protrudes from the first ceiling wall portion 14B to the second ceiling wall portion 16B described later, and has a hole portion 14G penetrating in the thickness direction of the first ceiling wall portion 14B. .
  • first ceiling wall portion 14B is formed with an annular ridge portion 14H extending along the circumferential direction at an outer peripheral end portion thereof.
  • This protrusion 14H is an example of the case fixing part and the filter fixing part in the present invention, and protrudes from the first ceiling wall part 14B to the second ceiling wall part 16B described later.
  • the second upper case 16 has an inverted cup shape having a second upper peripheral wall portion 16A formed in a cylindrical shape and a second ceiling wall portion 16B formed at the upper end portion of the second upper peripheral wall portion 16A. It is provided on the opposite side of the lower case 12 with respect to the first upper case 14.
  • a protrusion 14H is inserted inside the opening-side end 16C of the second upper case 16, and the end 16C and the protrusion 14H are fitted and fixed to each other.
  • the end portion 16C and the protruding portion 14H are further joined by, for example, laser welding or the like while being fitted to each other. Further, the end portion 16C is in contact with an edge portion 14I outside the protruding portion 14H in the first ceiling wall portion 14B.
  • the second upper case 16 forms a second combustion chamber 22 with the first ceiling wall portion 14B.
  • the second gas generating agent 24 similar to the first gas generating agent 20 described above is accommodated in the second combustion chamber 22.
  • the second combustion chamber 22 has a smaller capacity than the first combustion chamber 18 described above, and the second gas generating agent 24 accommodated in the second combustion chamber 22 has a first capacity.
  • the amount is smaller than that of the first gas generating agent 20 accommodated in one combustion chamber 18.
  • the second combustion chamber 22 is set to a lower output than the first combustion chamber 18.
  • a plurality of second gas injection holes 16D are formed in the above-described second upper peripheral wall portion 16A in the circumferential direction.
  • the first combustion chamber 18 is provided with a cylindrical first inner cylinder member 26.
  • the lower end portion 26A of the first inner cylinder member 26 is fixed to the bottom wall portion 12B by being press-fitted into the mounting hole 12C, and the upper wall portion 26B of the first inner cylinder member 26 is the first ceiling wall. It is in contact with the portion 14B.
  • the first inner cylinder member 26 is formed with a plurality of heat transfer holes 26 ⁇ / b> C aligned in the circumferential direction and opened to the first combustion chamber 18.
  • a first explosive 28 for burning the first gas generating agent 20 accommodated in 18 is accommodated.
  • a cylindrical second inner cylinder member 30 formed longer in the axial direction than the first inner cylinder member 26 is provided next to the first inner cylinder member 26 .
  • the lower end portion 30A of the second inner cylinder member 30 is fixed to the bottom wall portion 12B by being press-fitted into the mounting hole 12D.
  • the second inner cylindrical member 30 is inserted from the first combustion chamber 18 to the second combustion chamber 22 through the hole 14G, and the upper wall portion 30B is formed of the second ceiling wall portion 16B. It is in contact with.
  • the outer peripheral surface of the second inner cylinder member 30 is in close contact with the inner peripheral surface of the hole 14G, for example, by press-fitting or laser welding.
  • a plurality of heat transfer holes 30 ⁇ / b> D that are arranged in the circumferential direction and open to the second combustion chamber 22 are formed in the upper portion 30 ⁇ / b> C provided in the second combustion chamber 22 of the second inner cylindrical member 30.
  • a second explosive 32 for burning the second gas generating agent 24 accommodated in the second combustion chamber 22 is accommodated in the second inner cylinder member 30.
  • first igniter 34 and a second igniter 36 are accommodated in the lower part of the first inner cylinder member 26 and the lower part of the second inner cylinder member 30, respectively.
  • the first igniter 34 and the second igniter 36 are configured to ignite when an operating current is supplied, and to ignite the above-described first transfer charge 28 and second transfer charge 32, respectively.
  • the first filter 38 is accommodated in the first combustion chamber 18.
  • the first filter 38 is a member for cooling the high-temperature gas generated by the combustion of the first gas generating agent 20 and filtering the combustion residue.
  • the first filter 38 is formed in an annular shape extending along the first upper peripheral wall portion 14A, and is sandwiched between the bottom wall portion 12B and the first ceiling wall portion 14B.
  • a second filter 40 similar to the first filter 38 is accommodated in the second combustion chamber 22.
  • the second filter 40 is formed in an annular shape extending along the second upper peripheral wall portion 16A, and is sandwiched between the first ceiling wall portion 14B and the second ceiling wall portion 16B.
  • the end 40A on the first ceiling wall 14B side of the second filter 40 is inserted inside the ridge 14H, and the end 40A and the ridge 14H are fitted to each other.
  • first inner cylindrical member 26 is provided with a disk-shaped first retainer 42, and the first filter 38 is supported by the first retainer 42 from the inner peripheral side.
  • the first retainer 42 is formed with an insertion hole 42A through which the second inner cylinder member 30 is inserted.
  • a disc-shaped second retainer 44 is attached to the second inner cylindrical member 30, and the second filter 40 is supported by the second retainer 44 from the inner peripheral side.
  • an annular support member 46 is provided between the second filter 40 and the second upper peripheral wall portion 16A, and the second filter 40 is supported by the support member 46 from the outer peripheral side.
  • the first gas injection hole 14D and the second gas injection hole 16D are sealed by tapes 48 and 50 attached to the inner peripheral surfaces of the first upper peripheral wall part 14A and the second upper peripheral wall part 16A. Has been.
  • the vertical direction is defined with the bottom wall portion 12B side as the lower side and the second ceiling wall portion 16B side as the upper side, but this vertical direction indicates the vertical direction in the inflator 10. It is a thing. Therefore, depending on the mounting position of the inflator 10 on the vehicle, that is, the type of the vehicle airbag device to which the inflator 10 is applied, the vertical direction of the inflator 10 may not match the vertical direction of the vehicle.
  • the first transfer charge 28 and the second transfer charge 32 are respectively introduced into the first inner cylinder member 26 and the second inner cylinder member 30.
  • the 1st igniter 34 and the 2nd igniter 36 are each assembled
  • the lower end portion 26A of the first inner cylinder member 26 and the lower end portion 30A of the second inner cylinder member 30 are fixed to the bottom wall portion 12B by being press-fitted into the mounting holes 12C and 12D, respectively.
  • the first filter 38 is assembled to the lower case 12, the first gas generating agent 20 is charged inside the first filter 38, and the first retainer 42 is attached to the first inner cylinder member 26.
  • the second inner cylinder member 30 is inserted into the hole 14G, and the first upper case 14 is brought closer to the lower case 12. Then, until the upper wall portion 26B of the first inner cylinder member 26 is in contact with the first ceiling wall portion 14B, the opening side end portion 14C of the first upper case 14 is located on the opening side of the lower case 12.
  • the end 12E is inserted, and the end 12E and the end 14C are fitted to each other. Further, both the end portions 12E and 14C are further joined by, for example, laser welding or the like in a state of being fitted to each other.
  • the first upper case 14 is assembled to the lower case 12, whereby the first filter 38 is sandwiched between the bottom wall portion 12B and the first ceiling wall portion 14B.
  • the end 40A of the second filter 40 on the first ceiling wall 14B side is inserted inside the ridge 14H, and the end 40A and the ridge 14H are fitted to each other. Is assembled to the first upper case 14. Then, the second gas generating agent 24 is introduced into the second filter 40, and the second retainer 44 is attached to the second inner cylinder member 30.
  • the support member 46 is assembled inside the second upper case 16.
  • the edge part 16C of the opening side in the 2nd upper case 16 is the protrusion part in the 1st ceiling wall part 14B.
  • the ridge 14H is inserted inside the opening-side end 16C of the second upper case 16 until it is in contact with the edge 14I outside of 14H, and the end 16C and the ridge 14H are mutually connected. Mated. Further, the end portion 16C and the protruding portion 14H are further joined by, for example, laser welding or the like in a state where they are fitted to each other.
  • the second upper case 16 is assembled to the first upper case 14 in this manner, whereby the second filter 40 is sandwiched between the first ceiling wall portion 14B and the second ceiling wall portion 16B.
  • the inflator 10 is assembled as described above.
  • the said assembly method is an example and it is possible to change an order suitably.
  • the tapes 48 and 50 are attached to the inner peripheral surface of the first upper case 14 and the inner peripheral surface of the second upper case 16 at any stage of the assembly sequence.
  • the first igniter 34 ignites, and thereby the first transfer charge 28 accommodated in the first inner cylinder member 26 is ignited. The Then, the first gas generating agent 20 accommodated in the first combustion chamber 18 is burned to generate gas, and this gas breaks through the tape 48 and is injected from the first gas injection hole 14D into the interior of the airbag (not shown). Is done.
  • the second igniter 36 when the operating current is supplied to the second igniter 36, the second igniter 36 is ignited, and thereby the second transfer charge 32 accommodated in the second inner cylinder member 30 is ignited. Then, the second gas generating agent 24 accommodated in the second combustion chamber 22 is burned to generate gas, and this gas breaks through the tape 50 and is injected from the second gas injection hole 16D into the interior of the airbag (not shown). Is done.
  • first igniter 34 and the second igniter 36 it is also possible to ignite the first igniter 34 and the second igniter 36 at the same time.
  • gas is introduced from the first gas injection hole 14D and the second gas injection hole 16D into the interior of the airbag (not shown). Is injected.
  • the second combustion chamber 22 is set to have a lower output than the first combustion chamber 18. Therefore, when the second gas generating agent 24 is combusted in the second combustion chamber 22 and gas is injected from the second gas injection hole 16D, an airbag (not shown) is inflated and deployed at a low pressure.
  • an airbag (not shown) is inflated and deployed at an intermediate pressure, and the first combustion chamber 18 and When the first gas generating agent 20 and the second gas generating agent 24 are burned in the second combustion chamber 22, respectively, and gas is injected from the first gas injection hole 14D and the second gas injection hole 16D, respectively, an airbag (not shown) Is expanded at a high pressure.
  • the partition which divides the 1st combustion chamber 18 and the 2nd combustion chamber 22 with the 1st ceiling wall part 14B of the 1st upper case 14 made into the inverted cup shape. Is formed. Therefore, it is possible to suppress the gas from flowing from one combustion chamber of the first combustion chamber 18 and the second combustion chamber 22 to the other combustion chamber.
  • the combustion gas does not enter the first combustion chamber 18 on the high output side. Even if the first gas generating agent 20 is burned in the first combustion chamber 18 on the high output side, the second gas is generated in the second combustion chamber 22 on the low output side unless the second igniter 36 is operated. The agent 24 is not burned. Thereby, the gas of a desired pressure can be generated at a desired timing.
  • the first ceiling wall portion 14B of the first upper case 14 does not need to consider press-fitting or the like as in the prior art, and can be formed thick. Therefore, deformation of the first ceiling wall portion 14B can be suppressed by forming the first ceiling wall portion 14B thick. Thereby, it is possible to ensure the sealing performance between the inner peripheral surface of the hole 14G formed in the first ceiling wall portion 14B and the outer peripheral surface of the second inner cylindrical member 30 inserted through the hole 14G. it can.
  • the upper case attached to the upper side of the lower case 12 is divided by the first upper case 14 and the second upper case 16 in the axial direction, one upper case having a deep depth is used. As compared with the case, the depth of each of the first upper case 14 and the second upper case 16 can be reduced. Thus, even when each of the first upper case 14 and the second upper case 16 is formed by drawing, the first upper case 14 and the second upper case 16 can be easily manufactured.
  • the upper wall portion 26B of the first inner cylinder member 26 is replaced with the first ceiling wall portion.
  • the first upper case 14 can be positioned with respect to the lower case 12 by being brought into contact with 14B.
  • first inner case member 26 and the second inner case member 30 are assembled to the lower case 12, and the first upper case 14 is assembled to the second upper case 14 with the first upper case 14 assembled to the lower case 12.
  • the second upper case 16 can be positioned with respect to the first upper case 14 by bringing the upper wall portion 30B of the second inner cylindrical member 30 into contact with the second ceiling wall portion 16B.
  • the second upper case 16 can be fixed in a state where the second upper case 16 is positioned on the first upper case 14 by fitting the end 16C on the opening side of the second upper case 16 to the protrusion 14H.
  • the second filter 40 is fixed in a state where the second filter 40 is positioned on the first ceiling wall portion 14B by fitting the end portion 40A on the first ceiling wall portion 14B side of the second filter 40 to the ridge portion 14H. Can do.
  • first filter 38 is easily assembled to the lower case 12 and the first upper case 14 by sandwiching the first filter 38 between the bottom wall portion 12B and the first ceiling wall portion 14B of the lower case 12. be able to.
  • second filter 40 is easily assembled to the first upper case 14 and the second upper case 16 by sandwiching the second filter 40 between the first ceiling wall portion 14B and the second ceiling wall portion 16B. Can do.
  • the second combustion chamber 22 is set to a lower output than the first combustion chamber 18. Therefore, the height of the second combustion chamber 22 can be made lower than when the second combustion chamber 22 is set to have a higher output than the first combustion chamber 18. Thereby, the dimension from the attaching part 14E to the vehicle body formed in the first upper peripheral wall part 14A to the second ceiling wall part 16B can be reduced. That is, the inflator 10 can be reduced in size in the axial direction.
  • the instrument panel 66 is downsized in the height direction. be able to. That is, the position of the upper portion 66A of the instrument panel 66 can be lowered.
  • the attachment portion 14E is formed on the first upper peripheral wall portion 14A, but may be formed on the lower peripheral wall portion 12A. Further, in this case, the opening side end portion 14C of the first upper case 14 is inserted inside the opening side end portion 12E of the lower case 12, and the end portion 12E and the end portion 14C are fitted to each other. May be.
  • the end 16C on the opening side of the second upper case 16 may be inserted inside the protrusion 14H, and the end 16C and the protrusion 14H may be fitted to each other.
  • the ridge 14H may protrude from the first ceiling wall 14B to the lower case 12 side. Then, the end 38A on the first ceiling wall portion 14B side of the first filter 38 may be inserted inside the protrusion 14H, and the end 38A and the protrusion 14H may be fitted to each other.
  • the protrusion 14H protrudes from the first ceiling wall 14B to the lower case 12 side, the protrusion 14H is inside the end 38A of the first filter 38 on the first ceiling wall 14B side.
  • the protrusion 14H and the end 38A may be fitted to each other.
  • end 16F on the second upper case 16 side of the first upper peripheral wall portion 14A is inserted inside the end 16C on the opening side of the second upper case 16, and the end 16F and the end 16C are connected to each other. They may be fitted together.
  • the ridge 14H is used to fix the first upper case 14 and the second upper case 16, but instead of the ridge 14H, for example, a step formed on the first ceiling wall 14B. A part or the like may be used.
  • the ridge 14H is used to fix the second filter 40 and the first ceiling wall 14B.
  • the ridge 14H is formed on the first ceiling wall 14B. A stepped portion or the like may be used.
  • the end portion 16C on the opening side in the second upper case 16 and the end portion 40A on the first ceiling wall portion 14B side in the second filter 40 are all fitted with the protrusion 14H.
  • a ridge portion different from the ridge portion 14H is provided on the first ceiling wall portion 14B, and either one of the end portion 16C and the end portion 40A may be fitted with the other ridge portion.
  • the protruding portion fitted to the end portion 16C corresponds to the case fixing portion in the present invention
  • the protruding portion fitted to the end portion 40A corresponds to the filter fixing portion in the present invention.
  • the protrusion 14H is formed, so that the first filter 38 in the first filter 38 is formed in the recess 14K formed in the surface 14J on the first combustion chamber 18 side in the first ceiling wall portion 14B.
  • the end portion 38A on the one ceiling wall portion 14B side may be inserted by biting in. If comprised in this way, the support rigidity of the 1st filter 38 with respect to the 1st upper side case 14 can be improved.
  • a ridge portion 16E similar to the ridge portion 14H may protrude from the second ceiling wall portion 16B to the first ceiling wall portion 14B side.
  • the edge part 40B by the side of the 2nd ceiling wall part 16B in the 2nd filter 40 may be inserted inside this protrusion part 16E, and this edge part 40B and the protrusion part 16E may mutually be fitted.
  • the protrusion part 16E is an example of the fixing
  • the second filter 40 can be fixed in a state of being positioned on the first upper case 14 and the second upper case 16.
  • the ridge 16E protrudes from the second ceiling wall 16B toward the first ceiling wall 14B, the ridge 16E is the end 40A on the second ceiling wall 16B side of the second filter 40.
  • the end 40A and the protrusion 16E may be fitted to each other.
  • the ridge 16E is used to fix the second filter 40 and the second ceiling wall 16B.
  • a second A stepped portion or the like formed on the ceiling wall portion 16B may be used.
  • the vehicle airbag device S ⁇ b> 1 includes an airbag unit 62 and a control unit 64.
  • the airbag unit 62 is provided in a portion of the instrument panel 66 positioned in front of the passenger seat 68.
  • the instrument panel 66 is formed between the upper part 66A facing the upper side of the vehicle and the lower part 66B provided with the glove box door 70 so as to be curved so as to protrude toward the rear side and the upper side of the vehicle.
  • An intermediate portion 66C is provided.
  • the airbag unit 62 is provided in the vertical middle portion 66C.
  • the airbag unit 62 includes a case 72 and an airbag 74 in addition to the inflator 10 described above.
  • the case 72 is disposed on the back side of the middle portion 66C in the vertical direction, and is formed in a box shape that opens to the front side of the middle portion 66C in the vertical direction.
  • the airbag 74 is housed in a folded state inside the case 72, and the attachment portion 14 ⁇ / b> E is provided at the bottom of the case 72 together with the base portion of the airbag 74.
  • the first gas injection hole 14D and the second gas injection hole 16D (see FIG. 1) formed in the inflator 10 are opened inside the airbag 74.
  • the airbag 74 receives the supply of gas generated in at least one of the first combustion chamber 18 and the second combustion chamber 22 of the inflator 10 described above, so that the instrument panel 66 faces the passenger P in the passenger seat 68. It is designed to be inflated and deployed on the front side.
  • the control unit 64 shown in FIG. 4 is configured by an electronic circuit having an arithmetic processing device, a storage device, and the like.
  • a program for inflating and deploying the airbag 74 is stored in advance. The contents of this program will be described in detail later together with the operation of the vehicle airbag device S1. Further, a deceleration sensor 84 and a seat belt switch 86 are connected to the control unit 64.
  • the deceleration sensor 84 is provided on the vehicle body, and is configured to output a signal corresponding to the deceleration of the vehicle to the control unit 64. Although a single deceleration sensor 84 is shown in FIG. 4, a plurality of deceleration sensors 84 are usually provided on the vehicle body.
  • the passenger seat 68 is equipped with a seat belt 88.
  • the seat belt 88 is provided with a tongue 90
  • the vehicle body is provided with a buckle 92 that can be engaged with the tongue 90.
  • the seat belt switch 86 shown in FIG. 4 is built in the above-described buckle 92, and outputs a signal corresponding to the engagement state and the disengagement state of the tongue 90 and the buckle 92 to the control unit 64. It is said that.
  • the control unit 64 shown in FIG. 4 detects a signal output from the deceleration sensor 84 according to the deceleration of the vehicle at regular intervals.
  • the control unit 64 determines that the collision speed is greater than or equal to a predetermined first threshold based on the signal output from the deceleration sensor 84 due to the frontal collision of the vehicle, the storage device A program for inflating and deploying the airbag 74 stored in the above is executed, and each step shown in FIG. 6 is executed.
  • the control unit 64 determines that the collision speed V during a frontal collision of the vehicle is greater than or equal to the first threshold v1 and less than the second threshold v2 based on the signal output from the deceleration sensor 84 described above. Or whether the collision speed V is equal to or higher than the second threshold value v2.
  • the first threshold value v1 is set to 16 mph
  • the second threshold value v2 is set to 20 mph.
  • step ST1 the collision speed V when the above-mentioned vehicle collides in front is less than or equal to the first threshold value v1 and less than the second threshold value v2
  • step ST2 The operation current is output to the second igniter 36 shown in FIG.
  • the second igniter 36 operates when an operating current is input, and ignites the second gas generating agent 24 filled in the second inner cylinder member 30. Further, the gas generated when the second gas generating agent 24 is ignited is supplied to the inside of the airbag 74 shown in FIG. 5 through the second gas injection hole 16D, whereby the airbag 74 is inflated and deployed at a low pressure. The Then, the control unit 64 ends the series of steps.
  • step ST1 the collision speed V is greater than or equal to the second threshold value v2
  • the control unit 64 proceeds to step ST3. Then, based on the signal output from the seat belt switch 86, the control unit 64 determines whether the tongue 90 and the buckle 92 shown in FIG. It is determined whether or not the passenger P in the seat 68 is wearing the seat belt 88.
  • control unit 64 determines in step ST3 shown in FIG. 6 that the passenger in the passenger seat is wearing the seat belt, the control unit 64 proceeds to step ST4, and the first igniter shown in FIG. An operating current is output to 34.
  • the first igniter 34 operates when an operating current is input, and ignites the first gas generating agent 20 filled in the first inner cylinder member 26. Further, the gas generated when the first gas generating agent 20 is ignited is supplied into the airbag 74 shown in FIG. 5 through the first gas injection hole 14D, whereby the airbag 74 is inflated and deployed at an intermediate pressure. Is done. Then, the control unit 64 ends the series of steps.
  • step ST3 if the control unit 64 determines in step ST3 shown in FIG. 6 that the passenger in the passenger seat does not wear the seat belt, the control unit 64 proceeds to step ST5, and the first shown in FIG. An operating current is output to the igniter 34 and the second igniter 36. As a result, gas is generated from the first combustion chamber 18 and the second combustion chamber 22, and the airbag 74 is inflated and deployed at a high pressure. Then, the control unit 64 ends the series of steps.
  • control unit 64 for the sake of easy understanding, the various determinations performed by the control unit 64 are conceptually described. However, in reality, information processing corresponding to the conceptually described determination is performed by the control unit 64. At 64. The same applies to the second application example and the third application example described later.
  • the control unit 64 determines the collision speed before determining whether or not the seat belt is worn, and the collision speed V Is equal to or greater than the first threshold value v1 and less than the second threshold value v2, the second igniter 36 is operated to inflate and deploy the airbag 74 without determining whether or not the seat belt is worn. Therefore, for example, the program of the control unit 64 can be simplified as compared with the case where the presence or absence of the seat belt is determined before the collision speed is determined. it can.
  • the second igniter 36 is operated and the airbag 74 is inflated and deployed at a low pressure.
  • the first igniter 34 is activated and the airbag 74 is inflated and deployed at medium pressure.
  • the collision speed V is equal to or higher than the second threshold value v2
  • the first igniter 34 and the second igniter 36 are operated, and the airbag 74 has a high pressure. It is inflated and deployed. Therefore, since the airbag 74 is inflated and deployed at an appropriate pressure according to the collision speed and whether or not the seat belt is worn, the passenger in the passenger seat can be appropriately protected.
  • the second combustion chamber 22 set to a low output is located above the first combustion chamber 18 (an airbag door (not shown) provided on the instrument panel 66). It is located on the side close to. Therefore, for example, even when the passenger P of the passenger seat 68 is in the vicinity of the instrument panel 66 without wearing the seat belt 88, the airbag 74 can be inflated and deployed at an early stage. Thereby, this passenger
  • the vehicle airbag device S2 according to the second application example shown in FIG. 7 is different from the vehicle airbag device S1 according to the first application example shown in FIG. Is connected to the control unit 64, and the program stored in the storage device of the control unit 64 is changed.
  • the physique sensor 102 includes, for example, a weight sensor built in the seat cushion of the passenger seat, a position sensor that detects the sliding position of the passenger seat, and the like, and a signal corresponding to the size of the occupant of the passenger seat Is output to the control unit 64.
  • a program for inflating and deploying the stored airbag 74 is executed, and each step shown in FIG. 8 is executed.
  • step ST11 If the control unit 64 determines in step ST11 shown in FIG. 8 that the collision speed V is not less than the first threshold value v1 and less than the second threshold value v2, the control unit 64 proceeds to step ST12 and is shown in FIG. An operating current is output to the second igniter 36. Thereby, the airbag 74 is inflated and deployed at a low pressure.
  • step ST12 An operating current is output to the second igniter 36. Thereby, the airbag 74 is inflated and deployed at a low pressure.
  • step ST11 the control unit 64 determines in step ST11 shown in FIG. 8 that the collision speed V is equal to or higher than the second threshold value v2
  • the control unit 64 proceeds to step ST13.
  • the control unit 64 determines whether the size W of the passenger in the passenger seat is less than the reference value w0.
  • the control unit 64 determines whether the size W of the passenger in the passenger seat is less than the reference value w0.
  • the reference value w0 assumes an AF05 dummy doll
  • the size W of the passenger in the passenger seat is the reference.
  • the case where the value is greater than or equal to w0 assumes an AM50 dummy.
  • step ST13 When the control unit 64 determines in step ST13 shown in FIG. 8 that the size W of the passenger in the passenger seat is less than the reference value w0, the control unit 64 proceeds to step ST14 and shows in FIG. The operating current is output to the second igniter 36. Thereby, gas is supplied from the second combustion chamber 22 to the airbag 74, and the airbag 74 starts to expand.
  • control unit 64 proceeds to step ST15 shown in FIG. 8, and determines whether or not the elapsed time T after execution of step ST14 is equal to or longer than a predetermined delay time t1.
  • step ST15 shown in FIG. 8 If the control unit 64 determines in step ST15 shown in FIG. 8 that the elapsed time T is equal to or greater than a predetermined delay time t1, the control unit 64 proceeds to step ST16 shown in FIG. An operating current is output to the first igniter 34 shown in FIG. As a result, gas is supplied from the first combustion chamber 18 to the airbag 74, and the airbag 74 is inflated and deployed at a higher pressure than in the case of step ST12 described above. Then, the control unit 64 ends the series of steps.
  • control unit 64 determines in step ST13 shown in FIG. 8 that the size W of the passenger in the passenger seat is equal to or greater than the reference value w0, the control unit 64 proceeds to step ST17, and FIG. The operating current is output to the second igniter 36 shown in FIG. Thereby, gas is supplied from the second combustion chamber 22 to the airbag 74, and the airbag 74 starts to expand.
  • step ST18 shown in FIG. 8, and determines whether or not the elapsed time T after execution of step ST17 is equal to or longer than a predetermined delay time t2.
  • the delay time t2 is set longer than the delay time t1 in the above-described step ST15.
  • the delay time t1 is set to 10 ms
  • the delay time t2 is set to 30 ms.
  • step ST18 shown in FIG. 8 If the control unit 64 determines in step ST18 shown in FIG. 8 that the elapsed time T is equal to or longer than a predetermined delay time t2, the control unit 64 proceeds to step ST19 shown in FIG. An operating current is output to the first igniter 34 shown in FIG. As a result, gas is supplied from the first combustion chamber 18 to the airbag 74, and the airbag 74 is inflated and deployed at a higher pressure than in the case of step ST12 described above. Then, the control unit 64 ends the series of steps.
  • the control unit 64 determines the collision speed before determining the size of the occupant of the passenger seat, When the collision speed V is greater than or equal to the first threshold value v1 and less than the second threshold value v2, the second igniter 36 is operated to inflate and deploy the airbag 74 without determining the size of the passenger seat passenger size.
  • the program of the control unit 64 can be simplified compared with the case where the size of the passenger in the passenger seat is determined before the collision speed is determined. You can expedite.
  • the collision speed V is equal to or higher than the second threshold v2
  • the first igniter 34 and the second igniter 36 are operated, and the collision speed V is equal to or higher than the first threshold v1 and lower than the second threshold v2.
  • the airbag 74 is inflated and deployed at a higher pressure.
  • the collision speed V is equal to or greater than the second threshold value v2 and the size W of the passenger in the passenger seat is greater than or equal to the reference value w0
  • the size W of the passenger in the passenger seat is less than the reference value w0.
  • the delay time is set longer than the time when the second igniter 36 is operated until the first igniter 34 is operated.
  • the first igniter 34 was activated after a certain delay time t1 had elapsed after the second igniter 36 was activated, but the first igniter 34 was activated.
  • the second igniter 36 may be activated after a certain delay time t1 has elapsed.
  • the first igniter 34 has been activated after a certain delay time t2 has elapsed after the second igniter 36 has been activated.
  • the second igniter 36 may be activated after a certain delay time t2 has elapsed after being activated.
  • the vehicle airbag device S3 according to the third application example shown in FIG. 9 has a seat belt switch 86 added to the vehicle airbag device S2 according to the second application example shown in FIG.
  • the program stored in the storage device of the unit 64 has been changed.
  • the seat belt switch 86 is the same as that used in the first application example described above.
  • the changes in the program stored in the storage device of the control unit 64 will be described in detail later together with the operation of the vehicle airbag device S3.
  • step ST21 the steps ST21 and ST22, and the step ST23 are the processing until the execution of step ST11 shown in FIG. Step ST12 is the same as step ST13.
  • control unit 64 shown in FIG. 9 determines in step ST23 shown in FIG. 10 that the size W of the passenger in the passenger seat is less than the reference value w0, the control unit 64 proceeds to step ST24. Then, the control unit 64 determines whether or not the passenger in the passenger seat is wearing the seat belt based on the signal output from the seat belt switch 86.
  • step ST24 When the control unit 64 determines in step ST24 shown in FIG. 10 that the passenger in the passenger seat is wearing the seat belt, the control unit 64 proceeds to step ST25, and the first igniter shown in FIG. An operating current is output to 34. As a result, gas is supplied from the first combustion chamber 18 to the airbag 74, and the airbag 74 begins to expand.
  • step ST26 the control unit 64 proceeds to step ST26 shown in FIG. 10, and determines whether or not the elapsed time T after execution of step ST25 is equal to or longer than a predetermined delay time t3.
  • the delay time t3 in this case is set longer than delay times t4 and t6 in steps ST29 and ST36 described later.
  • the delay time t3 is set to 100 ms.
  • step ST26 the control unit 64 determines in step ST26 shown in FIG. 10 that the elapsed time T is equal to or greater than a predetermined delay time t3
  • the control unit 64 proceeds to step ST27 and is shown in FIG.
  • An operating current is output to the second igniter 36. Thereby, gas is supplied from the second combustion chamber 22 to the airbag 74, and the airbag 74 is inflated and deployed at a higher pressure than in the case of step ST22 described above. Then, the control unit 64 ends the series of steps.
  • Step ST30 is executed. That is, the control unit 64 operates the second igniter 36 and inflates and deploys the airbag 74 after a certain delay time t4 has elapsed after the first igniter 34 is operated. Then, the control unit 64 ends the series of steps.
  • the delay time t4 is set to 10 ms.
  • step ST23 the control unit 64 determines in step ST23 shown in FIG. 10 that the size W of the passenger in the passenger seat is greater than or equal to the reference value w0
  • the control unit 64 proceeds to step ST31. Then, the control unit 64 determines whether or not the passenger in the passenger seat is wearing the seat belt based on the signal output from the seat belt switch 86.
  • step ST31 When the control unit 64 determines in step ST31 shown in FIG. 10 that the passenger in the passenger seat is wearing the seat belt, the control unit 64 performs the same steps ST32 to ST27 as those described above. Execute ST34. That is, the control unit 64 operates the second igniter 36 to inflate and deploy the airbag 74 after a certain delay time t5 has elapsed after the first igniter 34 is operated. Then, the control unit 64 ends the series of steps.
  • the delay time t5 in step ST33 is set to be the same as the delay time t3 in step ST26 described above. That is, here, as an example, the delay time t5 is set to 100 ms.
  • step ST31 shown in FIG. 10 that the passenger in the passenger seat does not wear the seat belt
  • the control unit 64 proceeds to step ST35 and performs the second operation shown in FIG. An operating current is output to the igniter 36. Thereby, gas is supplied from the second combustion chamber 22 to the airbag 74, and the airbag 74 starts to expand.
  • step ST36 determines whether or not the elapsed time T after execution of step ST35 is equal to or longer than a predetermined delay time t6.
  • the delay time t6 in this case is set longer than the delay time t4 in the above-described step ST29.
  • the delay time t6 is set to 30 ms.
  • step ST36 determines in step ST36 shown in FIG. 10 that the elapsed time T is equal to or greater than a predetermined delay time t6
  • the control unit 64 proceeds to step ST37 and is shown in FIG.
  • An operating current is output to the first igniter 34.
  • gas is supplied from the first combustion chamber 18 to the airbag 74, and the airbag 74 is inflated and deployed at a higher pressure than in the case of step ST22 described above. Then, the control unit 64 ends the series of steps.
  • the size of the passenger's physique is determined on the condition that the seat belt is not worn.
  • the size W is greater than or equal to the reference value w0
  • one of the first igniter 34 and the second igniter 36 is greater than when the size W of the passenger in the passenger seat is less than the reference value w0.
  • a long delay time is set from the time of being activated until the other is activated. Therefore, since the airbag 74 is inflated and deployed with an appropriate pressure according to whether or not the seat belt is worn, in addition to the collision speed and the size of the passenger in the passenger seat, the passenger in the passenger seat can be appropriately protected.
  • the first igniter is more effective when the passenger in the passenger seat is wearing the seat belt than when the passenger in the passenger seat is not wearing the seat belt.
  • the delay time from when one of 34 and the second igniter 36 is activated until the other is activated is set long. Thus, even when it takes time to be restrained by the airbag 74 by wearing the seat belt, the passenger in the passenger seat can be appropriately protected.
  • the second igniter 36 is activated after a certain delay time has elapsed after the first igniter 34 is activated.
  • the first igniter 34 may be activated after a certain delay time has elapsed after the second igniter 36 is activated.
  • the first igniter 34 was activated after a certain delay time had elapsed after the second igniter 36 was activated, but the first igniter 34 was activated.
  • the second igniter 36 may be activated after a certain delay time has elapsed.
  • the airbag unit 62 is provided in a portion of the instrument panel 66 positioned in front of the passenger seat 68. It may be provided on the wheel. That is, the airbag unit 62 may be provided for the driver's seat in addition to being provided for the passenger seat.
  • the processing function for inflating and deploying the airbag 74 in the control unit 64 is a program, but it may be a logic circuit.

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

Abstract

L'invention a pour objectif d'empêcher un gaz provenant d'une chambre de combustion, première ou seconde chambre de combustion, de contourner l'autre chambre de combustion. Le gonfleur (10) de l'invention est équipé : d'une enveloppe côté inférieur (12) en forme de gobelet; d'une première enveloppe côté supérieur (14) qui tout en prenant une forme de gobelet inversé, présente une partie extrémité côté ouverture (14C) fixée à une partie extrémité côté ouverture (12E) au niveau de l'enveloppe côté inférieur (12),et forme avec l'enveloppe côté inférieur (12) la première chambre de combustion (18) dans laquelle un premier agent générateur de gaz (20) est soumis à une combustion; et d'une seconde enveloppe côté supérieur (16) qui tout en étant agencée côté opposé à l'enveloppe côté inférieur (12) par rapport à la première enveloppe côté supérieur (14), prend aussi une forme de gobelet inversé, présente une partie extrémité côté ouverture (16C) fixée à la première enveloppe côté supérieur (14), et forme avec une première partie paroi de dessus (14B) de la première enveloppe côté supérieur (14), la seconde chambre de combustion (22) dans laquelle un second agent générateur de gaz (24) est soumis à une combustion.
PCT/JP2011/065892 2011-07-12 2011-07-12 Gonfleur de type à sortie à deux étages pour coussin de sécurité gonflable, et dispositif de coussin de sécurité gonflable pour véhicule WO2013008316A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/065892 WO2013008316A1 (fr) 2011-07-12 2011-07-12 Gonfleur de type à sortie à deux étages pour coussin de sécurité gonflable, et dispositif de coussin de sécurité gonflable pour véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/065892 WO2013008316A1 (fr) 2011-07-12 2011-07-12 Gonfleur de type à sortie à deux étages pour coussin de sécurité gonflable, et dispositif de coussin de sécurité gonflable pour véhicule

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WO2013008316A1 true WO2013008316A1 (fr) 2013-01-17

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PCT/JP2011/065892 WO2013008316A1 (fr) 2011-07-12 2011-07-12 Gonfleur de type à sortie à deux étages pour coussin de sécurité gonflable, et dispositif de coussin de sécurité gonflable pour véhicule

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109641567A (zh) * 2016-08-29 2019-04-16 株式会社大赛璐 气体发生器
KR20210013710A (ko) 2018-05-22 2021-02-05 주식회사 다이셀 가스 발생기

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CN109641567B (zh) * 2016-08-29 2021-10-08 株式会社大赛璐 气体发生器
KR20210013710A (ko) 2018-05-22 2021-02-05 주식회사 다이셀 가스 발생기
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