WO2013008316A1 - Dual-stage-output inflator for airbag, and vehicle airbag device - Google Patents

Dual-stage-output inflator for airbag, and vehicle airbag device 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
Other languages
French (fr)
Japanese (ja)
Inventor
修 深渡瀬
誠 尾関
Original Assignee
トヨタ自動車株式会社
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 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/en
Publication of WO2013008316A1 publication Critical patent/WO2013008316A1/en

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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

In order to suppress the circulation of gas from one combustion chamber to the other in a first combustion chamber and a second combustion chamber, an inflator (10) is provided with: a cup-shaped lower case (12); an inverted cup-shaped first upper case (14), an end part (14C) on the open side thereof being fixed to an end part (12E) on the open side of the lower case (12), and the first upper case and the lower case (12)forming a first combustion chamber (18) for combusting a first gas forming agent (20); and an inverted cup-shaped second upper case (16) provided on the opposite side of the first upper case (14) from the lower case (12), an end part (16C) on the open side of the second upper case being fixed to the first upper case (14), and the second upper case and a first ceiling wall (14B) of the first upper case (14) forming a second combustion chamber (22) for combusting a second gas forming agent (24).

Description

エアバッグ用二段出力式インフレータ及び車両用エアバッグ装置Two-stage output inflator for airbag and airbag device for vehicle
　本発明は、エアバッグ用二段出力式インフレータ及び車両用エアバッグ装置に関する。 The present invention relates to a two-stage output inflator for an airbag and an airbag apparatus for a vehicle.
　特許文献１には、筒状ハウジングと、この筒状ハウジングの内側に設けられ、筒状ハウジングの内部を第一及び第二の燃焼室に区画する隔壁と、第一及び第二の燃焼室の夫々に対応して筒状ハウジングに形成された第一及び第二のガス排出口とを備えた多段式エアバッグ用ガス発生器が開示されている。 In 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.
特開２００１－３５４１０５号公報JP 2001-354105 A 特開平１１－５９３１８号公報Japanese Patent Laid-Open No. 11-59318 特開２００１－３５３４３８号公報JP 2001-353438 A 特開２００２－２７４３１６号公報JP 2002-274316 A
　しかしながら、この多段式エアバッグ用ガス発生器において、隔壁が筒状ハウジングの内側に圧入される場合、この隔壁の圧入を可能とするためには、隔壁の厚肉化が制限される。従って、例えば、第一及び第二の燃焼室のうち一方の燃焼室にてガスが発生した場合に、隔壁の変形に伴って筒状ハウジングと隔壁との間に隙間が生じ、この隙間を通じて一方の燃焼室から他方の燃焼室にガスが回り込む虞がある。 However, in this multistage air bag gas generator, when the partition wall is press-fitted inside the cylindrical housing, in order to enable the press-fitting of the partition wall, the increase in the thickness of the partition wall is limited. Therefore, for example, when gas is generated in one of the first and second combustion chambers, a gap is formed between the cylindrical housing and the partition wall due to the deformation of the partition wall, and one of the chambers passes through this clearance. There is a risk that gas may flow from one combustion chamber to the other combustion chamber.
　また、この種のエアバッグ用二段出力式インフレータを備えた前席乗員用の車両用エアバッグ装置では、前席乗員を適切に保護できることが望まれる。 Also, in a vehicle airbag device for a front seat occupant equipped with this type of two-stage output inflator for an airbag, it is desired that the front seat occupant can be appropriately protected.
　本発明は、上記課題に鑑みてなされたものであって、その目的は、第一燃焼室及び第二燃焼室のうち一方の燃焼室から他方の燃焼室にガスが回り込むことを抑制することができるエアバッグ用二段出力式インフレータを提供することにある。 This invention is made | formed in view of the said subject, Comprising: 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.
　また、本発明の他の目的は、前席乗員を適切に保護することができる車両用エアバッグ装置を提供することを目的とする。 Another object of the present invention is to provide a vehicle airbag device capable of appropriately protecting a front seat occupant.
　前記課題を解決するために、本発明の第一態様に係るエアバッグ用二段出力式インフレータは、筒状に形成された下側周壁部と、前記下側周壁部の下端部に形成された底壁部とを有するカップ状の下側ケースと、第一ガス噴射孔が形成された第一上側周壁部と、前記第一上側周壁部の上端部に形成された第一天井壁部とを有する逆さカップ状とされると共に、開口側の端部が前記下側ケースにおける開口側の端部に固定され、前記下側ケースとで第一ガス発生剤を燃焼させる第一燃焼室を形成する第一上側ケースと、第二ガス噴射孔が形成された第二上側周壁部と、前記第二上側周壁部の上端部に形成された第二天井壁部とを有する逆さカップ状とされると共に、前記第一上側ケースに対する前記下側ケースと反対側に設けられて開口側の端部が前記第一上側ケースに固定され、前記第一天井壁部とで第二ガス発生剤を燃焼させる第二燃焼室を形成する第二上側ケースと、を備えている。 In order to solve the above problems, a two-stage output inflator for an airbag according to the first aspect of the present invention 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. , Provided on the side opposite to the lower case with respect to the first upper case, Parts is fixed to the first upper case, and a, a second upper case forming the second combustion chamber for burning the second gas generating agent in said first ceiling wall portion.
　なお、本発明では、下側ケースの底壁部側を下側、第二上側ケースの第二天井壁部側を上側として上下方向を規定しているが、この上下方向は、エアバッグ用二段出力式インフレータにおける上下方向を示したものである。従って、インフレータの車両への搭載位置、つまり、インフレータが適用される車両用エアバッグ装置の種類によっては、エアバッグ用二段出力式インフレータにおける上下方向と、車両における上下方向とが一致しない場合も有り得る。 In the present invention, 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.
　このエアバッグ用二段出力式インフレータによれば、逆さカップ状とされた第一上側ケースの第一天井壁部によって、第一燃焼室と第二燃焼室とを区画する隔壁が形成されている。従って、第一燃焼室及び第二燃焼室のうち一方の燃焼室から他方の燃焼室にガスが回り込むことを抑制することができる。 According to the two-stage output inflator for an air bag, 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.
　本発明の第二態様に係るエアバッグ用二段出力式インフレータは、本発明の第一態様に係るエアバッグ用二段出力式インフレータにおいて、前記第一燃焼室に設けられると共に、前記第一燃焼室に収容された前記第一ガス発生剤を燃焼させるための第一伝火薬を収容し、上壁部が前記第一天井壁部に当接された第一内筒部材と、前記第一天井壁部に形成された孔部の内周面と密着された状態で前記孔部に挿通されて、前記第一燃焼室から前記第二燃焼室に亘って設けられると共に、前記第二燃焼室に収容された前記第二ガス発生剤を燃焼させるための第二伝火薬を収容し、上壁部が前記第二天井壁部に当接された第二内筒部材と、をさらに備えている。 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 A first inner cylinder member containing a first explosive for burning the first gas generating agent contained in a chamber and having an upper wall portion in contact with the first ceiling wall portion; and the first ceiling Inserted through the hole in close contact with the inner peripheral surface of the hole formed in the wall, provided from the first combustion chamber to the second combustion chamber, and in the second combustion chamber A second inner cylinder member containing a second explosive for burning the stored second gas generating agent and having an upper wall portion in contact with the second ceiling wall portion;
　このエアバッグ用二段出力式インフレータによれば、下側ケースに第一内筒部材を組み付けた状態で、下側ケースに第一上側ケースを組み付けるときには、第一内筒部材の上壁部を第一天井壁部に当接させることで、第一上側ケースを下側ケースに対して位置決めすることができる。 According to this two-stage output inflator for an airbag, when the first upper case is assembled to the lower case with the first inner cylinder member being assembled to the lower case, 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.
　同様に、下側ケースに第一内筒部材及び第二内筒部材を組み付けると共に、下側ケースに第一上側ケースを組み付けた状態で、第一上側ケースに第二上側ケースを組み付けるときには、第二内筒部材の上壁部を第二天井壁部に当接させることで、第二上側ケースを第一上側ケースに対して位置決めすることができる。 Similarly, when the first inner cylinder member and the second inner cylinder member are assembled to the lower case, and the second upper case is assembled to the first upper case with the first upper case assembled to the lower case, 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.
　なお、第一上側ケースの第一天井壁部については、従来のように圧入等を考慮する必要が無いので、厚肉に形成することが可能である。従って、この第一天井壁部を厚肉に形成することにより、この第一天井壁部の変形を抑制することができる。これにより、第一天井壁部に形成された孔部の内周面と、この孔部に挿通された第二内筒部材の外周面との間のシール性を確保することができる。 Note that 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.
　本発明の第三態様に係るエアバッグ用二段出力式インフレータは、本発明の第一態様又は第二態様に係るエアバッグ用二段出力式インフレータにおいて、前記第一天井壁部から前記第二天井壁部側に突出されると共に、前記第二上側ケースにおける開口側の端部が嵌合されたケース固定部をさらに備えている。 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.
　このエアバッグ用二段出力式インフレータによれば、第二上側ケースにおける開口側の端部を、第一天井壁部から第二天井壁部側に突出されたケース固定部に嵌合することで、第二上側ケースを第一上側ケースに位置決めした状態で固定することができる。 According to 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.
　本発明の第四態様に係るエアバッグ用二段出力式インフレータは、本発明の第一態様～第三態様のいずれか一つのエアバッグ用二段出力式インフレータにおいて、前記第一燃焼室に収容されると共に、前記第一上側周壁部に沿って延びる環状に形成され、前記底壁部と前記第一天井壁部とに挟持された第一フィルタと、前記第二燃焼室に収容されると共に、前記第二上側周壁部に沿って延びる環状に形成され、前記第一天井壁部と前記第二天井壁部とに挟持された第二フィルタと、をさらに備えている。 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.
　このエアバッグ用二段出力式インフレータによれば、第一フィルタを下側ケースの底壁部と第一天井壁部とに挟持させることで、この第一フィルタを下側ケース及び第一上側ケースに容易に組み付けることができる。同様に、第二フィルタを第一天井壁部と第二天井壁部とに挟持させることで、この第二フィルタを第一上側ケース及び第二上側ケースに容易に組み付けることができる。 According to this two-stage output inflator for an airbag, 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. Can be easily assembled. Similarly, 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.
　本発明の第五態様に係るエアバッグ用二段出力式インフレータは、本発明の第四態様に係るエアバッグ用二段出力式インフレータにおいて、前記第一天井壁部から突出され、前記第一フィルタ及び前記第二フィルタの少なくとも一方における前記第一天井壁部側の端部が嵌合されたフィルタ固定部をさらに備えている。 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.
　このエアバッグ用二段出力式インフレータによれば、第一フィルタ及び第二フィルタの少なくとも一方における第一天井壁部側の端部を、第一天井壁部から突出されたフィルタ固定部に嵌合することで、第一フィルタ及び第二フィルタの少なくとも一方を第一上側ケース及び第二上側ケースに位置決めした状態で固定することができる。 According to this two-stage output inflator for an airbag, 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. By doing so, at least one of the first filter and the second filter can be fixed in a state of being positioned on the first upper case and the second upper case.
　本発明の第六態様に係るエアバッグ用二段出力式インフレータは、本発明の第四態様又は第五態様に係るエアバッグ用二段出力式インフレータにおいて、前記第二天井壁部から前記第一天井壁部側に突出され、前記第二フィルタにおける前記第二天井壁部側の端部が嵌合された固定部をさらに備えている。 An airbag two-stage output inflator according to a sixth aspect of the present invention 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.
　このエアバッグ用二段出力式インフレータによれば、第二フィルタにおける第二天井壁部側の端部を、第二天井壁部から第一天井壁部側に突出された固定部に嵌合することで、第二フィルタを第一上側ケース及び第二上側ケースに位置決めした状態で固定することができる。 According to this two-stage output inflator for an airbag, 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. Thus, the second filter can be fixed in a state of being positioned on the first upper case and the second upper case.
　本発明の第七態様に係るエアバッグ用二段出力式インフレータは、本発明の第一態様～第五態様のいずれか一つのエアバッグ用二段出力式インフレータにおいて、前記第二燃焼室が、前記第一燃焼室よりも低出力に設定された構成とされている。 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.
　このエアバッグ用二段出力式インフレータによれば、第二燃焼室は、第一燃焼室よりも低出力に設定されている。従って、第二燃焼室が第一燃焼室よりも高出力に設定された場合に比して、第二燃焼室の高さを低くすることができる。これにより、例えば、下側周壁部又は第一上側周壁部に車体への取付部が形成された場合には、この取付部から第二天井壁部までの寸法を小さくすることができる。つまり、エアバッグ用二段出力式インフレータを軸方向に小型化することができる。 According to this two-stage output inflator for an airbag, 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. Thereby, for example, when the attachment part to the vehicle body is formed on the lower peripheral wall part or the first upper peripheral wall part, 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.
　前記課題を解決するために、本発明の第八態様に係る車両用エアバッグ装置は、ガスの供給を受けて前席乗員に向けて膨張展開されるエアバッグと、前記第一伝火薬に着火する第一点火器と、前記第二伝火薬に着火する第二点火器とを備え、前記エアバッグにガスを供給する本発明の第七態様に係るエアバッグ用二段出力式インフレータと、車両の前面衝突時に、車両の減速度に応じて減速度センサから出力された信号に基づいて衝突速度が第一閾値以上第二閾値未満であると判断した場合には、前記第二点火器を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記前席乗員によるシートベルトの着用の有無に応じてシートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していると判断したときには、前記第一点火器を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記シートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していないと判断したときには、前記第一点火器及び前記第二点火器を作動させて前記エアバッグを膨張展開させる制御ユニットと、を備えている。 In order to solve the above-described problem, a vehicle airbag apparatus according to an eighth aspect of the present invention is 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. 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 the signal output from the deceleration sensor according to the vehicle deceleration, the second igniter is activated. 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 When it is determined that the front seat occupant is wearing a seat belt based on the signal output from the switch, the first igniter is activated to inflate and deploy the airbag, and the deceleration sensor outputs When 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. And a control unit that operates the first igniter and the second igniter to inflate and deploy the airbag.
　この車両用エアバッグ装置によれば、制御ユニットは、シートベルトの着用の有無を判断する前に衝突速度を判断しており、衝突速度が第一閾値以上第二閾値未満である場合には、シートベルトの着用の有無を判断せずに、第二点火器を作動させてエアバッグを膨張展開させる。従って、例えば、衝突速度を判断する前にシートベルトの着用の有無を判断する場合に比して、制御ユニットの処理機能を簡素化することができるので、エアバッグの展開開始を早めることができる。 According to this vehicle airbag device, 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. .
　また、衝突速度が第一閾値以上第二閾値未満である場合には、第二点火器が作動されてエアバッグが低圧で膨張展開される。一方、衝突速度が第二閾値以上である場合に、前席乗員がシートベルトを着用しているときには、第一点火器が作動されてエアバッグが中圧で膨張展開される。また、衝突速度が第二閾値以上である場合に、前席乗員がシートベルトを着用していないときには、第一点火器及び第二点火器が作動されてエアバッグが高圧で膨張展開される。従って、衝突速度及びシートベルトの着用の有無に応じた適切な圧力でエアバッグが膨張展開されるので、前席乗員を適切に保護することができる。 Also, when the collision speed is not less than the first threshold value and less than the second threshold value, the second igniter is activated and the airbag is inflated and deployed at a low pressure. On the other hand, when the collision speed is equal to or higher than the second threshold and the front seat occupant wears the seat belt, the first igniter is activated and the airbag is inflated and deployed at medium pressure. When the collision speed is equal to or higher than the second threshold and the front seat occupant is not wearing a seat belt, 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.
　また、前記課題を解決するために、本発明の第九態様に係る車両用エアバッグ装置は、ガスの供給を受けて前席乗員に向けて膨張展開されるエアバッグと、前記第一伝火薬に着火する第一点火器と、前記第二伝火薬に着火する第二点火器とを備え、前記エアバッグにガスを供給する本発明の第七態様に係るエアバッグ用二段出力式インフレータと、車両の前面衝突時に、車両の減速度に応じて減速度センサから出力された信号に基づいて衝突速度が第一閾値以上第二閾値未満であると判断した場合には、前記第二点火器を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記前席乗員の体格の大きさに応じて体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが基準値未満であると判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に一定の遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが前記基準値以上であると判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に前記一定の遅延時間よりも長い遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させる制御ユニットと、を備えている。 In order to solve the above problems, a vehicle airbag apparatus according to a ninth aspect of the present invention 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 signal, a certain delay time has elapsed after operating one of the first igniter and the second igniter. From the above, 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. When it is determined that the size of the physique of the front seat occupant is greater than or equal to the reference value based on the signal output from the physique sensor, 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.
　この車両用エアバッグ装置によれば、制御ユニットは、前席乗員の体格の大きさを判断する前に衝突速度を判断しており、衝突速度が第一閾値以上第二閾値未満である場合には、前席乗員の体格の大きさを判断せずに、第二点火器を作動させてエアバッグを膨張展開させる。従って、例えば、衝突速度を判断する前に前席乗員の体格の大きさを判断する場合に比して、制御ユニットの処理機能を簡素化することができるので、エアバッグの展開開始を早めることができる。 According to this vehicle airbag device, 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.
　また、衝突速度が第二閾値以上である場合には、第一点火器及び第二点火器が作動されて、衝突速度が第一閾値以上第二閾値未満である場合よりも高い圧力でエアバッグが膨張展開される。さらに、衝突速度が第二閾値以上である場合に、前席乗員の体格の大きさが基準値以上であるときには、前席乗員の体格の大きさが基準値未満であるときよりも、第一点火器及び第二点火器の一方が作動されてから他方が作動されるまで遅延時間が長く設定される。従って、体格の小さい乗員に比して車両後方に着座しエアバッグに拘束されるまで時間を要する体格の大きい乗員に対して遅延時間を長く設定することで、より圧力の高い状態にあるエアバッグで体格の大きい乗員を拘束することができる。この結果、衝突速度及び体格の大きさに応じて、前席乗員を適切に保護することができる。 Further, when the collision speed is equal to or higher than the second threshold, 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. Therefore, 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.
　また、本発明の第十態様に係る車両用エアバッグ装置は、本発明の第九態様に係る車両用エアバッグ装置において、前記制御ユニットが、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが基準値未満であると判断し且つ前記前席乗員によるシートベルトの着用の有無に応じてシートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していないと判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に一定の遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが基準値以上であると判断し且つ前記シートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していないと判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に前記一定の遅延時間よりも長い遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させる構成とされている。 The vehicle airbag apparatus according to the tenth aspect of the present invention 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 When it is determined that the front seat occupant is not wearing a seat belt based on a signal output from a seat belt switch according to whether or not the seat belt is worn by the occupant, 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 or equal to a reference value based on the signal output from the physique sensor. When it is determined that the front seat occupant is not wearing a seat belt based on a signal output from the seat belt switch, 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.
　この車両用エアバッグ装置によれば、衝突速度が第二閾値以上である場合には、シートベルトを着用していないことを条件に、前席乗員の体格の大きさが基準値以上であるときの方が、前席乗員の体格の大きさが基準値未満であるときよりも、第一点火器及び第二点火器の一方が作動されてから他方が作動されるまで遅延時間が長く設定される。従って、衝突速度及び前席乗員の体格に加え、シートベルトの着用の有無に応じた適切な圧力でエアバッグが膨張展開されるので、前席乗員を適切に保護することができる。 According to the vehicle airbag device, when the collision speed is equal to or greater than the second threshold, 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. In this case, 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 Therefore, in addition to the collision speed and the physique of the front seat occupant, the airbag is inflated and deployed with an appropriate pressure depending on whether or not the seat belt is worn, and thus the front seat occupant can be appropriately protected.
　また、本発明の第十一態様に係る車両用エアバッグ装置は、本発明の第十態様に係る車両用エアバッグ装置において、前記制御ユニットが、衝突速度が前記第二閾値以上であると判断した場合に、前記前席乗員がシートベルトを着用していると判断したときには、前記前席乗員がシートベルトを着用していないと判断したときよりも、前記第一点火器及び前記第二点火器の一方が作動されてから他方が作動されるまでの遅延時間を長く設定する構成とされている。 The vehicle airbag device according to the eleventh aspect of the present invention 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. When it is determined that the front seat occupant is wearing a seat belt, 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.
　この車両用エアバッグ装置によれば、衝突速度が第二閾値以上である場合に、前席乗員がシートベルトを着用しているときには、前席乗員がシートベルトを着用していないときよりも、第一点火器及び第二点火器の一方が作動されてから他方が作動されるまでの遅延時間が長く設定される。これにより、シートベルトを着用することでエアバッグに拘束されるまでに時間を要する場合でも、前席乗員を適切に保護することができる。 According to 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.
　以上詳述したように、本発明のエアバッグ用二段出力式インフレータによれば、第一燃焼室及び第二燃焼室のうち一方の燃焼室から他方の燃焼室にガスが回り込むことを抑制することができる。 As described in detail above, according to the two-stage output inflator for an air bag of the present invention, 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.
　また、本発明の車両用エアバッグ装置によれば、前席乗員を適切に保護することができる。 Further, according to the vehicle airbag device of the present invention, the front seat occupant can be appropriately protected.
本発明の一実施形態に係るインフレータの側面断面図である。It is side surface sectional drawing of the inflator which concerns on one Embodiment of this invention. 図１に示されるインフレータの第一変形例を示す要部拡大側面断面図である。It is a principal part expanded side surface sectional view which shows the 1st modification of the inflator shown by FIG. 図１に示されるインフレータの第二変形例を示す要部拡大側面断面図である。It is a principal part expanded side surface sectional view which shows the 2nd modification of the inflator shown by FIG. 図１に示されるインフレータが適用された第一適用例に係る車両用エアバッグ装置の全体構成を示すブロック図である。It is a block diagram which shows the whole structure of the airbag apparatus for vehicles which concerns on the 1st application example to which the inflator shown by FIG. 1 was applied. 図４に示される車両用エアバッグ装置が搭載された車両の一部を示す側面断面図である。It is side surface sectional drawing which shows a part of vehicle by which the airbag apparatus for vehicles shown by FIG. 4 is mounted. 図４に示される車両用エアバッグ装置の動作を説明するフローチャートである。It is a flowchart explaining operation | movement of the airbag apparatus for vehicles shown by FIG. 図１に示されるインフレータが適用された第二適用例に係る車両用エアバッグ装置の全体構成を示すブロック図である。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. 図７に示される車両用エアバッグ装置の動作を説明するフローチャートである。It is a flowchart explaining operation | movement of the airbag apparatus for vehicles shown by FIG. 図１に示されるインフレータが適用された第三適用例に係る車両用エアバッグ装置の全体構成を示すブロック図である。It is a block diagram which shows the whole structure of the vehicle airbag apparatus which concerns on the 3rd application example to which the inflator shown by FIG. 1 was applied. 図９に示される車両用エアバッグ装置の動作を説明するフローチャートである。10 is a flowchart for explaining the operation of the vehicle airbag device shown in FIG. 9.
　以下、本発明の一実施形態について説明する。 Hereinafter, an embodiment of the present invention will be described.
　図１に示されるインフレータ１０は、本発明におけるエアバッグ用二段出力式インフレータの一例である。このインフレータ１０は、下側ケース１２と、第一上側ケース１４と、第二上側ケース１６とを備えている。 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.
　下側ケース１２は、円筒状に形成された下側周壁部１２Ａと、この下側周壁部１２Ａの下端部に形成された底壁部１２Ｂとを有するカップ状とされている。底壁部１２Ｂには、その中心部を挟んだ両側に厚さ方向に貫通する取付穴１２Ｃ，１２Ｄが形成されている。 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.
　第一上側ケース１４は、円筒状に形成された第一上側周壁部１４Ａと、この第一上側周壁部１４Ａの上端部に形成された第一天井壁部１４Ｂとを有する逆さカップ状とされている。この第一上側ケース１４における開口側の端部１４Ｃの内側には、下側ケース１２における開口側の端部１２Ｅが挿入されており、この端部１２Ｅと端部１４Ｃとは、互いに嵌合されている。 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.
　また、この両方の端部１２Ｅ，１４Ｃは、互いに嵌合された状態でさらに例えばレーザ溶接等により接合されている。そして、この第一上側ケース１４は、下側ケース１２とで第一燃焼室１８を形成している。この第一燃焼室１８には、第一ガス発生剤２０が収容されている。 Further, 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.
　また、上述の第一上側周壁部１４Ａには、その周方向に並んで複数の第一ガス噴射孔１４Ｄが形成されている。また、この第一上側ケース１４における開口側の端部１４Ｃには、この第一上側ケース１４の径方向外側に向けて延びるフランジ状の取付部１４Ｅが形成されている。この取付部１４Ｅは、図示しない車体に取り付けるためのものである。 Further, a plurality of first gas injection holes 14D are formed in the above-described first upper peripheral wall portion 14A in the circumferential direction. Further, 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).
　一方、第一天井壁部１４Ｂには、その中心部から偏芯した位置に嵌合部１４Ｆが形成されている。この嵌合部１４Ｆは、第一天井壁部１４Ｂから後述する第二天井壁部１６Ｂ側に突出されており、第一天井壁部１４Ｂの厚さ方向に貫通する孔部１４Ｇを有している。 On the other hand, 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. .
　また、第一天井壁部１４Ｂには、その外周側の端部に周方向に沿って延びる環状の突条部１４Ｈが形成されている。この突条部１４Ｈは、本発明におけるケース固定部及びフィルタ固定部の一例であり、第一天井壁部１４Ｂから後述する第二天井壁部１６Ｂ側に突出されている。 Further, the 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.
　第二上側ケース１６は、円筒状に形成された第二上側周壁部１６Ａと、この第二上側周壁部１６Ａの上端部に形成された第二天井壁部１６Ｂとを有する逆さカップ状とされており、第一上側ケース１４に対する下側ケース１２と反対側に設けられている。 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.
　第二上側ケース１６における開口側の端部１６Ｃの内側には、突条部１４Ｈが挿入されており、この端部１６Ｃと突条部１４Ｈとは、互いに嵌合されて固定されている。この端部１６Ｃと突条部１４Ｈとは、互いに嵌合された状態でさらに例えばレーザ溶接等により接合されている。また、この端部１６Ｃは、第一天井壁部１４Ｂにおける突条部１４Ｈよりも外側の縁部１４Ｉと当接されている。そして、この第二上側ケース１６は、第一天井壁部１４Ｂとで第二燃焼室２２を形成している。 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.
　この第二燃焼室２２には、上述の第一ガス発生剤２０と同様の第二ガス発生剤２４が収容されている。この第二燃焼室２２は、上述の第一燃焼室１８よりも高さが低くされることで小容量とされており、この第二燃焼室２２に収容された第二ガス発生剤２４は、第一燃焼室１８に収容された第一ガス発生剤２０よりも少量とされている。そして、これにより、第二燃焼室２２は、第一燃焼室１８よりも低出力に設定されている。また、上述の第二上側周壁部１６Ａには、その周方向に並んで複数の第二ガス噴射孔１６Ｄが形成されている。 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. Thereby, the second combustion chamber 22 is set to a lower output than the first combustion chamber 18. In addition, a plurality of second gas injection holes 16D are formed in the above-described second upper peripheral wall portion 16A in the circumferential direction.
　また、第一燃焼室１８には、円筒状の第一内筒部材２６が設けられている。この第一内筒部材２６の下端部２６Ａは、取付穴１２Ｃに圧入されることによって底壁部１２Ｂに固定されており、この第一内筒部材２６の上壁部２６Ｂは、第一天井壁部１４Ｂに当接されている。この第一内筒部材２６には、周方向に並び第一燃焼室１８に開口する複数の伝火孔２６Ｃが形成されており、この第一内筒部材２６の内部には、第一燃焼室１８に収容された第一ガス発生剤２０を燃焼させるための第一伝火薬２８が収容されている。 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.
　また、この第一内筒部材２６の隣には、この第一内筒部材２６よりも軸方向に長く形成された円筒状の第二内筒部材３０が設けられている。この第二内筒部材３０の下端部３０Ａは、取付穴１２Ｄに圧入されることによって底壁部１２Ｂに固定されている。また、この第二内筒部材３０は、孔部１４Ｇに挿通されて第一燃焼室１８から第二燃焼室２２に亘って設けられており、その上壁部３０Ｂは、第二天井壁部１６Ｂに当接されている。 Further, next to the first inner cylinder member 26, a cylindrical second inner cylinder member 30 formed longer in the axial direction than the first inner cylinder member 26 is provided. 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.
　第二内筒部材３０の外周面は、孔部１４Ｇの内周面と例えば圧入やレーザ溶接等により密着された状態とされている。また、この第二内筒部材３０のうち第二燃焼室２２の内部に設けられた上部３０Ｃには、周方向に並び第二燃焼室２２に開口する複数の伝火孔３０Ｄが形成されている。さらに、この第二内筒部材３０の内部には、第二燃焼室２２に収容された第二ガス発生剤２４を燃焼させるための第二伝火薬３２が収容されている。 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. . Further, 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.
　また、この第一内筒部材２６の下部、及び、第二内筒部材３０の下部には、それぞれ第一点火器３４及び第二点火器３６が収容されている。この第一点火器３４及び第二点火器３６は、作動電流が供給されると点火し、上述の第一伝火薬２８及び第二伝火薬３２をそれぞれ着火する構成とされている。 Also, a 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.
　また、第一燃焼室１８には、第一フィルタ３８が収容されている。この第一フィルタ３８は、第一ガス発生剤２０が燃焼することで発生した高温のガスを冷却すると共に、その燃焼残渣を濾過するための部材である。この第一フィルタ３８は、第一上側周壁部１４Ａに沿って延びる環状に形成されており、底壁部１２Ｂと第一天井壁部１４Ｂとに挟持されている。 Further, 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.
　一方、第二燃焼室２２には、第一フィルタ３８と同様の第二フィルタ４０が収容されている。この第二フィルタ４０は、第二上側周壁部１６Ａに沿って延びる環状に形成されており、第一天井壁部１４Ｂと第二天井壁部１６Ｂとに挟持されている。この第二フィルタ４０における第一天井壁部１４Ｂ側の端部４０Ａは、突条部１４Ｈの内側に挿入されており、この端部４０Ａと突条部１４Ｈとは、互いに嵌合されている。 Meanwhile, 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.
　また、第一内筒部材２６には、円板状の第一リテーナ４２が装着されており、第一フィルタ３８は、この第一リテーナ４２によって内周側から支持されている。この第一リテーナ４２には、第二内筒部材３０が挿通された挿通孔４２Ａが形成されている。 Further, the 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.
　一方、第二内筒部材３０には、円板状の第二リテーナ４４が装着されており、第二フィルタ４０は、この第二リテーナ４４によって内周側から支持されている。さらに、第二フィルタ４０と第二上側周壁部１６Ａとの間には、環状の支持部材４６が設けられており、第二フィルタ４０は、この支持部材４６によって外周側から支持されている。また、上述の第一ガス噴射孔１４Ｄ及び第二ガス噴射孔１６Ｄは、第一上側周壁部１４Ａ及び第二上側周壁部１６Ａの各々の内周面に貼り付けられたテープ４８，５０によって封止されている。 On the other hand, 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. Further, 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.
　なお、本発明の一実施形態では、底壁部１２Ｂ側を下側、第二天井壁部１６Ｂ側を上側として上下方向を規定しているが、この上下方向は、インフレータ１０における上下方向を示したものである。従って、インフレータ１０の車両への搭載位置、つまり、インフレータ１０が適用される車両用エアバッグ装置の種類によっては、インフレータ１０における上下方向と、車両における上下方向とが一致しない場合も有り得る。 In the embodiment of the present invention, 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.
　次に、上述のインフレータ１０の組立方法について説明する。 Next, a method for assembling the inflator 10 will be described.
　このインフレータ１０では、先ず、第一内筒部材２６及び第二内筒部材３０の内部に第一伝火薬２８及び第二伝火薬３２がそれぞれ投入される。そして、第一内筒部材２６及び第二内筒部材３０の下部に第一点火器３４及び第二点火器３６がそれぞれ組み付けられる。 In the inflator 10, first, 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. And the 1st igniter 34 and the 2nd igniter 36 are each assembled | attached to the lower part of the 1st inner cylinder member 26 and the 2nd inner cylinder member 30. As shown in FIG.
　次いで、第一内筒部材２６の下端部２６Ａ及び第二内筒部材３０の下端部３０Ａが、それぞれ取付穴１２Ｃ，１２Ｄに圧入されることによって底壁部１２Ｂに固定される。また、下側ケース１２に第一フィルタ３８が組み付けられると共に、この第一フィルタ３８の内側に第一ガス発生剤２０が投入され、第一内筒部材２６に第一リテーナ４２が装着される。 Next, 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. In addition, 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.
　続いて、第二内筒部材３０が孔部１４Ｇに挿入されて、第一上側ケース１４が下側ケース１２に近づけられる。そして、第一内筒部材２６の上壁部２６Ｂが第一天井壁部１４Ｂに当接されるまで、第一上側ケース１４における開口側の端部１４Ｃの内側に下側ケース１２における開口側の端部１２Ｅが挿入され、この端部１２Ｅと端部１４Ｃとが互いに嵌合される。また、この両方の端部１２Ｅ，１４Ｃは、互いに嵌合された状態でさらに例えばレーザ溶接等により接合される。 Subsequently, 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.
　そして、このようにして、第一上側ケース１４が下側ケース１２に組み付けられることにより、第一フィルタ３８が底壁部１２Ｂと第一天井壁部１４Ｂとに挟持される。 In this way, 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.
　次いで、第二フィルタ４０における第一天井壁部１４Ｂ側の端部４０Ａが突条部１４Ｈの内側に挿入されて、この端部４０Ａと突条部１４Ｈとが互いに嵌合され、第二フィルタ４０が第一上側ケース１４に組み付けられる。そして、この第二フィルタ４０の内側に第二ガス発生剤２４が投入され、第二内筒部材３０に第二リテーナ４４が装着される。 Next, 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.
　続いて、支持部材４６が第二上側ケース１６の内側に組み付けられる。そして、第二内筒部材３０の上壁部３０Ｂが第二天井壁部１６Ｂに当接されると共に、第二上側ケース１６における開口側の端部１６Ｃが第一天井壁部１４Ｂにおける突条部１４Ｈよりも外側の縁部１４Ｉと当接されまで、第二上側ケース１６における開口側の端部１６Ｃの内側に突条部１４Ｈが挿入されて、この端部１６Ｃと突条部１４Ｈとが互いに嵌合される。また、この端部１６Ｃと突条部１４Ｈとが互いに嵌合された状態でさらに例えばレーザ溶接等により接合される。 Subsequently, the support member 46 is assembled inside the second upper case 16. And while the upper wall part 30B of the 2nd inner cylinder member 30 is contact | abutted to the 2nd ceiling wall part 16B, 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.
　そして、このようにして、第二上側ケース１６が第一上側ケース１４に組み付けられることにより、第二フィルタ４０が第一天井壁部１４Ｂと第二天井壁部１６Ｂとに挟持される。 Then, 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.
　以上の要領で、インフレータ１０が組み立てられる。なお、上記組立方法は、一例であり、適宜、順序を入れ替えることが可能である。また、テープ４８，５０は、上記組立順序のいずれかの段階で第一上側ケース１４の内周面及び第二上側ケース１６の内周面に貼り付けられる。 The inflator 10 is assembled as described above. In addition, 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.
　次に、上述のインフレータ１０の動作について説明する。 Next, the operation of the above-described inflator 10 will be described.
　このインフレータ１０では、第一点火器３４に作動電流が供給されると、この第一点火器３４が点火し、これにより、第一内筒部材２６に収容された第一伝火薬２８が着火される。すると、第一燃焼室１８に収容された第一ガス発生剤２０が燃焼されてガスが発生し、このガスは、テープ４８を突き破って第一ガス噴射孔１４Ｄから図示しないエアバッグの内部に噴射される。 In the inflator 10, when an operating current is supplied to the first igniter 34, 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.
　一方、第二点火器３６に作動電流が供給されると、この第二点火器３６が点火し、これにより、第二内筒部材３０に収容された第二伝火薬３２が着火される。すると、第二燃焼室２２に収容された第二ガス発生剤２４が燃焼されてガスが発生し、このガスは、テープ５０を突き破って第二ガス噴射孔１６Ｄから図示しないエアバッグの内部に噴射される。 On the other hand, 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.
　また、第一点火器３４及び第二点火器３６を同時に点火させることも可能であり、この場合には、第一ガス噴射孔１４Ｄ及び第二ガス噴射孔１６Ｄから図示しないエアバッグの内部にガスが噴射される。 It is also possible to ignite the first igniter 34 and the second igniter 36 at the same time. In this case, 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.
　このインフレータ１０では、上述の通り、第二燃焼室２２は、第一燃焼室１８よりも低出力に設定されている。従って、第二燃焼室２２で第二ガス発生剤２４が燃焼されて第二ガス噴射孔１６Ｄからガスが噴射されるときには、図示しないエアバッグが低圧で膨張展開される。 In the inflator 10, as described above, 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.
　一方、第一燃焼室１８で第一ガス発生剤２０が燃焼されて第一ガス噴射孔１４Ｄからガスが噴射されるときには、図示しないエアバッグが中圧で膨張展開され、第一燃焼室１８及び第二燃焼室２２でそれぞれ第一ガス発生剤２０及び第二ガス発生剤２４が燃焼されて第一ガス噴射孔１４Ｄ及び第二ガス噴射孔１６Ｄからそれぞれガスが噴射されるときには、図示しないエアバッグが高圧で膨張展開される。 On the other hand, when the first gas generating agent 20 is combusted in the first combustion chamber 18 and gas is injected from the first gas injection hole 14D, 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.
　次に、本発明の一実施形態の作用及び効果について説明する。 Next, the operation and effect of one embodiment of the present invention will be described.
　本発明の一実施形態に係るインフレータ１０によれば、逆さカップ状とされた第一上側ケース１４の第一天井壁部１４Ｂによって、第一燃焼室１８と第二燃焼室２２とを区画する隔壁が形成されている。従って、第一燃焼室１８及び第二燃焼室２２のうち一方の燃焼室から他方の燃焼室にガスが回り込むことを抑制することができる。 According to the inflator 10 which concerns on one Embodiment of this invention, 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.
　つまり、低出力側の第二燃焼室２２にて第二ガス発生剤２４を燃焼させても、高出力側の第一燃焼室１８に燃焼ガスが回り込むことが無い。また、高出力側の第一燃焼室１８にて第一ガス発生剤２０を燃焼させても、第二点火器３６を作動させない限り、低出力側の第二燃焼室２２にて第二ガス発生剤２４が燃焼されることは無い。これにより、所望のタイミングで所望の圧力のガスを発生させることができる。 That is, even if the second gas generating agent 24 is combusted in the second combustion chamber 22 on the low output side, 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.
　また、第一上側ケース１４の第一天井壁部１４Ｂについては、従来のように圧入等を考慮する必要が無いので、厚肉に形成することが可能である。従って、この第一天井壁部１４Ｂを厚肉に形成することにより、この第一天井壁部１４Ｂの変形を抑制することができる。これにより、第一天井壁部１４Ｂに形成された孔部１４Ｇの内周面と、この孔部１４Ｇに挿通された第二内筒部材３０の外周面との間のシール性を確保することができる。 Further, 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.
　また、下側ケース１２の上側に取り付けられる上側ケースを、軸方向に分割して第一上側ケース１４及び第二上側ケース１６により構成しているので、深さの深い一つの上側ケースを用いた場合に比して、第一上側ケース１４及び第二上側ケース１６の夫々の深さを浅くすることができる。これにより、第一上側ケース１４及び第二上側ケース１６の夫々を絞り加工により形成する場合でも、この第一上側ケース１４及び第二上側ケース１６を容易に製造することができる。 Moreover, since 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.
　また、下側ケース１２に第一内筒部材２６を組み付けた状態で、下側ケース１２に第一上側ケース１４を組み付けるときには、第一内筒部材２６の上壁部２６Ｂを第一天井壁部１４Ｂに当接させることで、第一上側ケース１４を下側ケース１２に対して位置決めすることができる。 When the first upper case 14 is assembled to the lower case 12 with the first inner cylinder member 26 assembled to the lower case 12, 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.
　同様に、下側ケース１２に第一内筒部材２６及び第二内筒部材３０を組み付けると共に、下側ケース１２に第一上側ケース１４を組み付けた状態で、第一上側ケース１４に第二上側ケース１６を組み付けるときには、第二内筒部材３０の上壁部３０Ｂを第二天井壁部１６Ｂに当接させることで、第二上側ケース１６を第一上側ケース１４に対して位置決めすることができる。 Similarly, the 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. When the case 16 is assembled, 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. .
　また、第二上側ケース１６における開口側の端部１６Ｃを突条部１４Ｈに嵌合することで、第二上側ケース１６を第一上側ケース１４に位置決めした状態で固定することができる。 Also, 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.
　同様に、第二フィルタ４０における第一天井壁部１４Ｂ側の端部４０Ａを突条部１４Ｈに嵌合することで、第二フィルタ４０を第一天井壁部１４Ｂに位置決めした状態で固定することができる。 Similarly, 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.
　また、第一フィルタ３８を下側ケース１２の底壁部１２Ｂと第一天井壁部１４Ｂとに挟持させることで、この第一フィルタ３８を下側ケース１２及び第一上側ケース１４に容易に組み付けることができる。同様に、第二フィルタ４０を第一天井壁部１４Ｂと第二天井壁部１６Ｂとに挟持させることで、この第二フィルタ４０を第一上側ケース１４及び第二上側ケース１６に容易に組み付けることができる。 Further, the 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. Similarly, the 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.
　また、第二燃焼室２２は、第一燃焼室１８よりも低出力に設定されている。従って、第二燃焼室２２が第一燃焼室１８よりも高出力に設定された場合に比して、第二燃焼室２２の高さを低くすることができる。これにより、第一上側周壁部１４Ａに形成された車体への取付部１４Ｅから第二天井壁部１６Ｂまでの寸法を小さくすることができる。つまり、インフレータ１０を軸方向に小型化することができる。 Also, 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.
　この結果、例えば、このインフレータ１０が、後述するインストルメントパネル６６に装備されたエアバッグユニット６２（図５参照）に適用された場合には、このインストルメントパネル６６を高さ方向に小型化することができる。つまり、インストルメントパネル６６の上部６６Ａの位置を低くすることができる。 As a result, for example, when the inflator 10 is applied to an airbag unit 62 (see FIG. 5) mounted on the instrument panel 66 described later, 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.
　次に、本発明の一実施形態に係るインフレータ１０の変形例について説明する。 Next, a modification of the inflator 10 according to an embodiment of the present invention will be described.
　上述の本発明の一実施形態において、取付部１４Ｅは、第一上側周壁部１４Ａに形成されていたが、下側周壁部１２Ａに形成されていても良い。また、この場合に、下側ケース１２における開口側の端部１２Ｅの内側に、第一上側ケース１４における開口側の端部１４Ｃが挿入され、この端部１２Ｅと端部１４Ｃとが互いに嵌合されても良い。 In the above-described embodiment of the present invention, 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.
　また、突条部１４Ｈの内側に、第二上側ケース１６における開口側の端部１６Ｃが挿入され、この端部１６Ｃと突条部１４Ｈとが互いに嵌合されても良い。 Also, 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.
　また、突条部１４Ｈは、第一天井壁部１４Ｂから下側ケース１２側に突出されても良い。そして、第一フィルタ３８における第一天井壁部１４Ｂ側の端部３８Ａが突条部１４Ｈの内側に挿入され、この端部３８Ａと突条部１４Ｈとが互いに嵌合されても良い。 Further, 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.
　また、突条部１４Ｈが第一天井壁部１４Ｂから下側ケース１２側に突出された場合には、この突出部１４Ｈが第一フィルタ３８における第一天井壁部１４Ｂ側の端部３８Ａの内側に挿入されて、この突条部１４Ｈと端部３８Ａとが互いに嵌合されても良い。 Further, when 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.
　また、第二上側ケース１６における開口側の端部１６Ｃの内側に、第一上側周壁部１４Ａにおける第二上側ケース１６側の端部１６Ｆが挿入されて、この端部１６Ｆと端部１６Ｃとが互いに嵌合されても良い。 Further, the 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.
　また、第一上側ケース１４と第二上側ケース１６との固定に突条部１４Ｈが用いられていたが、この突条部１４Ｈの代わりに、例えば、第一天井壁部１４Ｂに形成された段部等が用いられても良い。 Further, 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.
　同様に、第二フィルタ４０と第一天井壁部１４Ｂとの固定にも突条部１４Ｈが用いられていたが、この突条部１４Ｈの代わりに、例えば、第一天井壁部１４Ｂに形成された段部等が用いられても良い。 Similarly, the ridge 14H is used to fix the second filter 40 and the first ceiling wall 14B. Instead of the ridge 14H, for example, the ridge 14H is formed on the first ceiling wall 14B. A stepped portion or the like may be used.
　また、第二上側ケース１６における開口側の端部１６Ｃ、及び、第二フィルタ４０における第一天井壁部１４Ｂ側の端部４０Ａは、いずれも突条部１４Ｈと嵌合されていたが、この突条部１４Ｈとは別の突条部が第一天井壁部１４Ｂに設けられ、この端部１６Ｃ及び端部４０Ａのどちらか一方は、この別の突条部と嵌合されていても良い。この場合には、端部１６Ｃと嵌合された突条部が本発明におけるケース固定部に相当し、端部４０Ａと嵌合された突条部が本発明におけるフィルタ固定部に相当する。 Further, 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. . In this case, the protruding portion fitted to the end portion 16C corresponds to the case fixing portion in the present invention, and the protruding portion fitted to the end portion 40A corresponds to the filter fixing portion in the present invention.
　また、図２に示されるように、突条部１４Ｈが形成されることにより第一天井壁部１４Ｂにおける第一燃焼室１８側の面１４Ｊに形成された凹部１４Ｋに、第一フィルタ３８における第一天井壁部１４Ｂ側の端部３８Ａが食い込むことで挿入されていても良い。このように構成されていると、第一上側ケース１４に対する第一フィルタ３８の支持剛性を向上させることができる。 In addition, as shown in FIG. 2, 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.
　また、図３に示されるように、突条部１４Ｈと同様の突条部１６Ｅが第二天井壁部１６Ｂから第一天井壁部１４Ｂ側に突出されていても良い。そして、この突条部１６Ｅの内側に第二フィルタ４０における第二天井壁部１６Ｂ側の端部４０Ｂが挿入され、この端部４０Ｂと突条部１６Ｅとが互いに嵌合されても良い。なお、突条部１６Ｅは、本発明における固定部の一例である。 Further, as shown in FIG. 3, 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. And 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. In addition, the protrusion part 16E is an example of the fixing | fixed part in this invention.
　このように構成されていても、第二フィルタ４０を第一上側ケース１４及び第二上側ケース１６に位置決めした状態で固定することができる。 Even in such a configuration, 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.
　また、突条部１６Ｅが第二天井壁部１６Ｂから第一天井壁部１４Ｂ側に突出された場合に、この突条部１６Ｅが第二フィルタ４０における第二天井壁部１６Ｂ側の端部４０Ａの内側に挿入され、この端部４０Ａと突条部１６Ｅとが互いに嵌合されても良い。 Further, when 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.
　また、図３に示される変形例では、第二フィルタ４０と第二天井壁部１６Ｂとの固定に突条部１６Ｅが用いられていたが、この突条部１６Ｅの代わりに、例えば、第二天井壁部１６Ｂに形成された段部等が用いられても良い。 In the modification shown in FIG. 3, the ridge 16E is used to fix the second filter 40 and the second ceiling wall 16B. Instead of the ridge 16E, for example, a second A stepped portion or the like formed on the ceiling wall portion 16B may be used.
　次に、本発明の一実施形態に係るインフレータ１０の適用例について説明する。 Next, an application example of the inflator 10 according to an embodiment of the present invention will be described.
　［第一適用例］
　図４に示されるように、第一適用例に係る車両用エアバッグ装置Ｓ１は、エアバッグユニット６２と、制御ユニット６４とを備えている。 [First application example]
As shown in FIG. 4, the vehicle airbag device S <b> 1 according to the first application example includes an airbag unit 62 and a control unit 64.
　エアバッグユニット６２は、図５に示されるように、インストルメントパネル６６における助手席６８の前方に位置する部分に設けられている。インストルメントパネル６６は、車両上側を向く上部６６Ａと、グラブボックスのドア７０が設けられた下部６６Ｂとの間に、車両後側且つ車両上側に凸を成すように湾曲して形成された上下方向中間部６６Ｃを有している。エアバッグユニット６２は、より具体的には、この上下方向中間部６６Ｃに設けられている。このエアバッグユニット６２は、上述のインフレータ１０に加え、ケース７２と、エアバッグ７４とを備えている。 As shown in FIG. 5, 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. More specifically, 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.
　ケース７２は、上下方向中間部６６Ｃの裏側に配置されており、上下方向中間部６６Ｃの表側に開口する箱状に形成されている。エアバッグ７４は、ケース７２の内側に折畳状態で収納されており、取付部１４Ｅは、エアバッグ７４の基部と共にケース７２の底部に設けられている。 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.
　インフレータ１０に形成された第一ガス噴射孔１４Ｄ及び第二ガス噴射孔１６Ｄ（図１参照）は、エアバッグ７４の内部に開口されている。このエアバッグ７４は、上述のインフレータ１０の第一燃焼室１８及び第二燃焼室２２の少なくとも一方にて発生したガスの供給を受けることにより、助手席６８の乗員Ｐに向けてインストルメントパネル６６の表側に膨張展開されるようになっている。 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.
　図４に示される制御ユニット６４は、演算処理装置や記憶装置等を有する電子回路によって構成されている。制御ユニット６４の記憶装置には、エアバッグ７４を膨張展開させるためのプログラムが予め記憶されている。このプログラムの内容については、車両用エアバッグ装置Ｓ１の動作と併せて後に詳述する。また、この制御ユニット６４には、減速度センサ８４と、シートベルトスイッチ８６が接続されている。 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. In the storage device of the control unit 64, 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.
　減速度センサ８４は、車体に設けられており、車両の減速度に応じた信号を制御ユニット６４に出力する構成とされている。減速度センサ８４は、図４において単数で示されているが、通常は、車体に複数設けられている。 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.
　また、図５に示されるように、助手席６８には、シートベルト８８が装備されている。このシートベルト８８には、タング９０が設けられており、車体には、タング９０と係合可能なバックル９２が設けられている。図４に示されるシートベルトスイッチ８６は、上述のバックル９２に内蔵されており、上述のタング９０とバックル９２との係合状態及び係合解除状態に応じた信号を制御ユニット６４に出力する構成とされている。 Further, as shown in FIG. 5, the passenger seat 68 is equipped with a seat belt 88. The seat belt 88 is provided with a tongue 90, and 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.
　次に、第一適用例に係る車両用エアバッグ装置Ｓ１の動作について説明する。 Next, the operation of the vehicle airbag device S1 according to the first application example will be described.
　図４に示される制御ユニット６４は、減速度センサ８４から車両の減速度に応じて出力された信号を一定の間隔で検出する。そして、制御ユニット６４は、車両が前面衝突したことに伴い、減速度センサ８４から出力された信号に基づいて衝突速度が予め定められた第一閾値以上であると判断した場合には、記憶装置に記憶していたエアバッグ７４を膨張展開させるためのプログラムを実行し、図６に示される各ステップを実行する。 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. When 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.
　先ず、制御ユニット６４は、図６に示されるステップＳＴ１において、上述の減速度センサ８４から出力された信号に基づき、車両の前面衝突時における衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満であるか、又は、衝突速度Ｖが第二閾値ｖ２以上であるかを判断する。ここでは、一例として、第一閾値ｖ１は、１６ｍｐｈ、第二閾値ｖ２は、２０ｍｐｈにそれぞれ設定されている。 First, in step ST1 shown in FIG. 6, 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. Here, as an example, the first threshold value v1 is set to 16 mph, and the second threshold value v2 is set to 20 mph.
　そして、制御ユニット６４は、図６に示されるステップＳＴ１において、上述の車両が前面衝突したときの衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満であると判断した場合には、ステップＳＴ２に移行し、図５に示される第二点火器３６に作動電流を出力する。 Then, when the control unit 64 determines in step ST1 shown in FIG. 6 that 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.
　第二点火器３６は、作動電流が入力されると作動し、第二内筒部材３０の内部に充填された第二ガス発生剤２４に着火する。また、第二ガス発生剤２４が着火されて発生したガスは、第二ガス噴射孔１６Ｄを通じて図５に示されるエアバッグ７４の内部に供給され、これにより、エアバッグ７４が低圧で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 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.
　一方、制御ユニット６４は、図６に示されるステップＳＴ１において、衝突速度Ｖが第二閾値ｖ２以上であると判断した場合には、ステップＳＴ３に移行する。そして、制御ユニット６４は、シートベルトスイッチ８６から出力された信号に基づいて、図５に示されるタング９０とバックル９２とが係合状態であるか又は係合解除状態であるか、すなわち、助手席６８の乗員Ｐがシートベルト８８を着用しているか否かを判断する。 On the other hand, if the control unit 64 determines in step ST1 shown in FIG. 6 that 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.
　そして、制御ユニット６４は、図６に示されるステップＳＴ３において、助手席の乗員がシートベルトを着用していると判断した場合には、ステップＳＴ４に移行し、図４に示される第一点火器３４に作動電流を出力する。 When the 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.
　第一点火器３４は、作動電流が入力されると作動し、第一内筒部材２６の内部に充填された第一ガス発生剤２０に着火する。また、第一ガス発生剤２０が着火されて発生したガスは、第一ガス噴射孔１４Ｄを通じて図５に示されるエアバッグ７４の内部に供給され、これにより、エアバッグ７４が中圧で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 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.
　これに対し、制御ユニット６４は、図６に示されるステップＳＴ３において、助手席の乗員がシートベルトを着用していないと判断した場合には、ステップＳＴ５に移行し、図５に示される第一点火器３４及び第二点火器３６に作動電流を出力する。これにより、第一燃焼室１８及び第二燃焼室２２からガスが発生されて、エアバッグ７４が高圧で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 On the other hand, 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.
　なお、本適用例では、理解の容易のために、制御ユニット６４が行う上記各種判断について概念的に記載したが、実際には、この概念的に記載された判断に相当する情報処理が制御ユニット６４において実行される。このことは、後述する第二適用例及び第三適用例でも同様である。 In this application example, 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.
　次に、第一適用例の作用及び効果について説明する。 Next, the operation and effect of the first application example will be described.
　以上詳述したように、第一適用例に係る車両用エアバッグ装置Ｓ１によれば、制御ユニット６４は、シートベルトの着用の有無を判断する前に衝突速度を判断しており、衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満である場合には、シートベルトの着用の有無を判断せずに、第二点火器３６を作動させてエアバッグ７４を膨張展開させる。従って、例えば、衝突速度を判断する前にシートベルトの着用の有無を判断する場合に比して、制御ユニット６４のプログラムを簡素化することができるので、エアバッグ７４の展開開始を早めることができる。 As described above in detail, according to the vehicle airbag device S1 according to the first application example, 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.
　また、衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満である場合には、第二点火器３６が作動されてエアバッグ７４が低圧で膨張展開される。一方、衝突速度Ｖが第二閾値ｖ２以上である場合に、助手席の乗員がシートベルトを着用しているときには、第一点火器３４が作動されてエアバッグ７４が中圧で膨張展開される。また、衝突速度Ｖが第二閾値ｖ２以上である場合に、助手席の乗員がシートベルトを着用していないときには、第一点火器３４及び第二点火器３６が作動されてエアバッグ７４が高圧で膨張展開される。従って、衝突速度及びシートベルトの着用の有無に応じた適切な圧力でエアバッグ７４が膨張展開されるので、助手席の乗員を適切に保護することができる。 Further, when the collision speed V is not less than the first threshold value v1 and less than the second threshold value v2, the second igniter 36 is operated and the airbag 74 is inflated and deployed at a low pressure. On the other hand, when the collision speed V is equal to or higher than the second threshold v2 and the passenger in the passenger seat is wearing the seat belt, the first igniter 34 is activated and the airbag 74 is inflated and deployed at medium pressure. . In addition, when the collision speed V is equal to or higher than the second threshold value v2, when the passenger in the passenger seat is not wearing the seat belt, 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.
　また、この車両用エアバッグ装置Ｓ１に備えられたインフレータ１０では、低出力に設定された第二燃焼室２２が第一燃焼室１８の上側（インストルメントパネル６６に設けられた図示しないエアバッグドアに近い側）に位置されている。従って、例えば、助手席６８の乗員Ｐがシートベルト８８を着用しないでインストルメントパネル６６に近接している状態であっても、エアバッグ７４を早期に膨張展開させることができる。これにより、この乗員Ｐを素早く拘束することができる。 Further, in the inflator 10 provided in the vehicle airbag apparatus S1, 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 | crew P can be restrained quickly.
　［第二適用例］
　次に、第二適用例について説明する。 [Second application example]
Next, a second application example will be described.
　図７に示される第二適用例に係る車両用エアバッグ装置Ｓ２は、図４に示される第一適用例に係る車両用エアバッグ装置Ｓ１に対し、シートベルトスイッチ８６の代わりに、体格センサ１０２が制御ユニット６４に接続されると共に、制御ユニット６４の記憶装置に記憶されたプログラムが変更されている。 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.
　体格センサ１０２は、例えば、助手席のシートクッションに内蔵された体重センサや、助手席のスライド位置を検出する位置センサ等によって構成されており、助手席の乗員の体格の大きさに応じた信号を制御ユニット６４に出力する構成とされている。 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.
　制御ユニット６４の記憶装置に記憶されたプログラムの変更点については、車両用エアバッグ装置Ｓ２の動作と併せて後に詳述する。 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 S2.
　次に、第二適用例に係る車両用エアバッグ装置Ｓ２の動作について説明する。 Next, the operation of the vehicle airbag device S2 according to the second application example will be described.
　図７に示される制御ユニット６４は、車両が前面衝突したことに伴い、減速度センサ８４から出力された信号に基づいて衝突速度が第一閾値以上であると判断した場合には、記憶装置に記憶していたエアバッグ７４を膨張展開させるためのプログラムを実行し、図８に示される各ステップを実行する。 When the control unit 64 shown in FIG. 7 determines that the collision speed is equal to or higher than the first threshold based on the signal output from the deceleration sensor 84 due to the frontal collision of the vehicle, A program for inflating and deploying the stored airbag 74 is executed, and each step shown in FIG. 8 is executed.
　そして、制御ユニット６４は、図８に示されるステップＳＴ１１において、衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満であると判断した場合には、ステップＳＴ１２に移行し、図５に示される第二点火器３６に作動電流を出力する。これにより、エアバッグ７４が低圧で膨張展開される。以上のステップは、図６に示される第一適用例におけるステップＳＴ２までのステップと同一である。 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. The above steps are the same as the steps up to step ST2 in the first application example shown in FIG.
　一方、制御ユニット６４は、図８に示されるステップＳＴ１１において、衝突速度Ｖが第二閾値ｖ２以上であると判断した場合には、ステップＳＴ１３に移行する。そして、制御ユニット６４は、体格センサ１０２から出力された信号に基づいて、助手席の乗員の体格の大きさＷが基準値ｗ０未満であるか否かを判断する。なお、一例として、この場合の助手席の乗員の体格の大きさＷが基準値ｗ０未満である場合とは、ＡＦ０５ダミー人形を想定しており、助手席の乗員の体格の大きさＷが基準値ｗ０以上である場合とは、ＡＭ５０ダミー人形を想定している。 On the other hand, if 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. Based on the signal output from the physique sensor 102, the control unit 64 determines whether the size W of the passenger in the passenger seat is less than the reference value w0. As an example, the case where the size W of the passenger in the passenger seat is less than the reference value w0 assumes an AF05 dummy doll, and 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.
　そして、制御ユニット６４は、図８に示されるステップＳＴ１３において、助手席の乗員の体格の大きさＷが基準値ｗ０未満であると判断した場合には、ステップＳＴ１４に移行し、図５に示される第二点火器３６に作動電流を出力する。これにより、第二燃焼室２２からエアバッグ７４にガスが供給され、エアバッグ７４が膨張し始める。 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.
　続いて、制御ユニット６４は、図８に示されるステップＳＴ１５に移行し、ステップＳＴ１４の実行後の経過時間Ｔが予め定められた一定の遅延時間ｔ１以上となったか否かを判断する。 Subsequently, the 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.
　そして、制御ユニット６４は、図８に示されるステップＳＴ１５において、経過時間Ｔが予め定められた一定の遅延時間ｔ１以上となったと判断した場合には、図８に示されるステップＳＴ１６に移行し、図５に示される第一点火器３４に作動電流を出力する。これにより、第一燃焼室１８からエアバッグ７４にガスが供給され、エアバッグ７４が上述のステップＳＴ１２の場合よりも高い圧力で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 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.
　これに対し、制御ユニット６４は、図８に示されるステップＳＴ１３において、助手席の乗員の体格の大きさＷが基準値ｗ０以上であると判断した場合には、ステップＳＴ１７に移行し、図５に示される第二点火器３６に作動電流を出力する。これにより、第二燃焼室２２からエアバッグ７４にガスが供給され、エアバッグ７４が膨張し始める。 In contrast, if the 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.
　続いて、制御ユニット６４は、図８に示されるステップＳＴ１８に移行し、ステップＳＴ１７の実行後の経過時間Ｔが予め定められた一定の遅延時間ｔ２以上となったか否かを判断する。この場合の遅延時間ｔ２は、上述のステップＳＴ１５における遅延時間ｔ１よりも長く設定されている。ここでは、一例として、遅延時間ｔ１は、１０ｍｓ、遅延時間ｔ２は、３０ｍｓにそれぞれ設定されている。 Subsequently, the control unit 64 proceeds to 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. In this case, the delay time t2 is set longer than the delay time t1 in the above-described step ST15. Here, as an example, the delay time t1 is set to 10 ms, and the delay time t2 is set to 30 ms.
　そして、制御ユニット６４は、図８に示されるステップＳＴ１８において、経過時間Ｔが予め定められた一定の遅延時間ｔ２以上となったと判断した場合には、図８に示されるステップＳＴ１９に移行し、図５に示される第一点火器３４に作動電流を出力する。これにより、第一燃焼室１８からエアバッグ７４にガスが供給され、エアバッグ７４が上述のステップＳＴ１２の場合よりも高い圧力で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 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.
　次に、第二適用例の作用及び効果について説明する。 Next, the operation and effect of the second application example will be described.
　以上詳述したように、第二適用例に係る車両用エアバッグ装置Ｓ２によれば、制御ユニット６４は、助手席の乗員の体格の大きさを判断する前に衝突速度を判断しており、衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満である場合には、助手席の乗員の体格の大きさを判断せずに、第二点火器３６を作動させてエアバッグ７４を膨張展開させる。従って、例えば、衝突速度を判断する前に助手席の乗員の体格の大きさを判断する場合に比して、制御ユニット６４のプログラムを簡素化することができるので、エアバッグ７４の展開開始を早めることができる。 As described above in detail, according to the vehicle airbag device S2 according to the second application example, 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. Let Therefore, for example, 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.
　また、衝突速度Ｖが第二閾値ｖ２以上である場合には、第一点火器３４及び第二点火器３６が作動されて、衝突速度Ｖが第一閾値ｖ１以上第二閾値ｖ２未満である場合よりも高い圧力でエアバッグ７４が膨張展開される。さらに、衝突速度Ｖが第二閾値ｖ２以上である場合に、助手席の乗員の体格の大きさＷが基準値ｗ０以上であるときには、助手席の乗員の体格の大きさＷが基準値ｗ０未満であるときよりも、第二点火器３６が作動されてから第一点火器３４が作動されるまで遅延時間が長く設定される。従って、体格の小さい乗員に比して車両後方に着座しエアバッグ７４に拘束されるまで時間を要する体格の大きい乗員に対して遅延時間を長く設定することで、より圧力の高い状態にあるエアバッグ７４で体格の大きい乗員を拘束することができる。この結果、衝突速度及び体格の大きさに応じて、助手席の乗員を適切に保護することができる。 Further, when 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. Further, when 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. Therefore, by setting a longer delay time for an occupant with a large physique that takes time to sit behind the vehicle and to be restrained by the airbag 74 as compared to an occupant with a small physique, air in a higher pressure state can be obtained. An occupant with a large physique can be restrained by the bag 74. As a result, the passenger in the passenger seat can be appropriately protected according to the collision speed and the size of the physique.
　なお、上述のステップＳＴ１４～ステップＳＴ１６では、第二点火器３６が作動された後に一定の遅延時間ｔ１が経過してから第一点火器３４が作動されていたが、第一点火器３４が作動された後に一定の遅延時間ｔ１が経過してから第二点火器３６が作動されても良い。 In steps ST14 to ST16 described above, 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.
　同様に、上述のステップＳＴ１７～ステップＳＴ１９では、第二点火器３６が作動された後に一定の遅延時間ｔ２が経過してから第一点火器３４が作動されていたが、第一点火器３４が作動された後に一定の遅延時間ｔ２が経過してから第二点火器３６が作動されても良い。 Similarly, in the above-described steps ST17 to ST19, 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.
　［第三適用例］
　次に、第三適用例について説明する。 [Third application example]
Next, a third application example will be described.
　図９に示される第三適用例に係る車両用エアバッグ装置Ｓ３は、図７に示される第二適用例に係る車両用エアバッグ装置Ｓ２に対し、シートベルトスイッチ８６が追加されると共に、制御ユニット６４の記憶装置に記憶されたプログラムが変更されている。 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.
　シートベルトスイッチ８６は、上述の第一適用例で用いられたものと同一である。制御ユニット６４の記憶装置に記憶されたプログラムの変更点については、車両用エアバッグ装置Ｓ３の動作と併せて後に詳述する。 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.
　次に、第三適用例に係る車両用エアバッグ装置Ｓ３の動作について説明する。 Next, the operation of the vehicle airbag device S3 according to the third application example will be described.
　なお、図１０に示されるステップＳＴ２１の実行を開始するまでの処理と、ステップＳＴ２１及びステップＳＴ２２と、ステップＳＴ２３は、図８に示されるステップＳＴ１１の実行を開始するまでの処理と、ステップＳＴ１１及びステップＳＴ１２と、ステップＳＴ１３とそれぞれ同一である。 Note that the processing until the start of the execution of step ST21 shown in FIG. 10, 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.
　図９に示される制御ユニット６４は、図１０に示されるステップＳＴ２３において、助手席の乗員の体格の大きさＷが基準値ｗ０未満であると判断した場合には、ステップＳＴ２４に移行する。そして、制御ユニット６４は、シートベルトスイッチ８６から出力された信号に基づいて、助手席の乗員がシートベルトを着用しているか否かを判断する。 When the 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.
　そして、制御ユニット６４は、図１０に示されるステップＳＴ２４において、助手席の乗員がシートベルトを着用していると判断した場合には、ステップＳＴ２５に移行し、図５に示される第一点火器３４に作動電流を出力する。これにより、第一燃焼室１８からエアバッグ７４にガスが供給され、エアバッグ７４が膨張し始める。 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.
　続いて、制御ユニット６４は、図１０に示されるステップＳＴ２６に移行し、ステップＳＴ２５の実行後の経過時間Ｔが予め定められた一定の遅延時間ｔ３以上となったか否かを判断する。この場合の遅延時間ｔ３は、後述するステップＳＴ２９及びステップＳＴ３６における遅延時間ｔ４，ｔ６よりも長く設定されている。ここでは、一例として、遅延時間ｔ３は、１００ｍｓに設定されている。 Subsequently, 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. Here, as an example, the delay time t3 is set to 100 ms.
　そして、制御ユニット６４は、図１０に示されるステップＳＴ２６において、経過時間Ｔが予め定められた一定の遅延時間ｔ３以上となったと判断した場合には、ステップＳＴ２７に移行し、図５に示される第二点火器３６に作動電流を出力する。これにより、第二燃焼室２２からエアバッグ７４にガスが供給され、エアバッグ７４が上述のステップＳＴ２２の場合よりも高い圧力で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 If 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.
　これに対し、制御ユニット６４は、図１０に示されるステップＳＴ２４において、助手席の乗員がシートベルトを着用していないと判断した場合には、上述のステップＳＴ２５～ステップＳＴ２７と同様であるステップＳＴ２８～ステップＳＴ３０を実行する。つまり、制御ユニット６４は、第一点火器３４を作動させた後に一定の遅延時間ｔ４が経過してから第二点火器３６を作動させてエアバッグ７４を膨張展開させる。そして、制御ユニット６４は、一連のステップを終了する。なお、一例として、遅延時間ｔ４は、１０ｍｓに設定されている。 On the other hand, if the control unit 64 determines in step ST24 shown in FIG. 10 that the passenger in the passenger seat is not wearing the seat belt, the control unit 64 is the same as step ST25 to step ST27 described above. 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. As an example, the delay time t4 is set to 10 ms.
　一方、制御ユニット６４は、図１０に示されるステップＳＴ２３において、助手席の乗員の体格の大きさＷが基準値ｗ０以上であると判断した場合には、ステップＳＴ３１に移行する。そして、制御ユニット６４は、シートベルトスイッチ８６から出力された信号に基づいて、助手席の乗員がシートベルトを着用しているか否かを判断する。 On the other hand, if 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.
　そして、制御ユニット６４は、図１０に示されるステップＳＴ３１において、助手席の乗員がシートベルトを着用していると判断した場合には、上述のステップＳＴ２５～ステップＳＴ２７と同様であるステップＳＴ３２～ステップＳＴ３４を実行する。つまり、制御ユニット６４は、第一点火器３４を作動させた後に一定の遅延時間ｔ５が経過してから第二点火器３６を作動させてエアバッグ７４を膨張展開させる。そして、制御ユニット６４は、一連のステップを終了する。なお、ステップＳＴ３３における遅延時間ｔ５は、上述のステップＳＴ２６における遅延時間ｔ３と同一に設定されている。つまり、ここでは、一例として、遅延時間ｔ５は、１００ｍｓに設定されている。 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. Note that 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.
　これに対し、制御ユニット６４は、図１０に示されるステップＳＴ３１において、助手席の乗員がシートベルトを着用していないと判断した場合には、ステップＳＴ３５に移行し、図５に示される第二点火器３６に作動電流を出力する。これにより、第二燃焼室２２からエアバッグ７４にガスが供給され、エアバッグ７４が膨張し始める。 On the other hand, if the control unit 64 determines in 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.
　続いて、制御ユニット６４は、図１０に示されるステップＳＴ３６に移行し、ステップＳＴ３５の実行後の経過時間Ｔが予め定められた一定の遅延時間ｔ６以上となったか否かを判断する。この場合の遅延時間ｔ６は、上述のステップＳＴ２９における遅延時間ｔ４よりも長く設定されている。ここでは、一例として、遅延時間ｔ６は、３０ｍｓに設定されている。 Subsequently, the control unit 64 proceeds to step ST36 shown in FIG. 10, and 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. Here, as an example, the delay time t6 is set to 30 ms.
　そして、制御ユニット６４は、図１０に示されるステップＳＴ３６において、経過時間Ｔが予め定められた一定の遅延時間ｔ６以上となったと判断した場合には、ステップＳＴ３７に移行し、図５に示される第一点火器３４に作動電流を出力する。これにより、第一燃焼室１８からエアバッグ７４にガスが供給され、エアバッグ７４が上述のステップＳＴ２２の場合よりも高い圧力で膨張展開される。そして、制御ユニット６４は、一連のステップを終了する。 If the control unit 64 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. 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 ST22 described above. Then, the control unit 64 ends the series of steps.
　次に、第三適用例の作用及び効果について、上述の第二適用例と異なる点を説明する。 Next, the points and effects of the third application example that are different from the second application example will be described.
　第三適用例に係る車両用エアバッグ装置Ｓ３によれば、衝突速度Ｖが第二閾値ｖ２以上である場合には、シートベルトを着用していないことを条件に、助手席の乗員の体格の大きさＷが基準値ｗ０以上であるときの方が、助手席の乗員の体格の大きさＷが基準値ｗ０未満であるときよりも、第一点火器３４及び第二点火器３６の一方が作動されてから他方が作動されるまで遅延時間が長く設定される。従って、衝突速度及び助手席の乗員の体格に加え、シートベルトの着用の有無に応じた適切な圧力でエアバッグ７４が膨張展開されるので、助手席の乗員を適切に保護することができる。 According to the vehicle airbag device S3 according to the third application example, when the collision speed V is equal to or greater than the second threshold value v2, the size of the passenger's physique is determined on the condition that the seat belt is not worn. When 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.
　また、衝突速度Ｖが第二閾値ｖ２以上である場合に、助手席の乗員がシートベルトを着用しているときには、助手席の乗員がシートベルトを着用していないときよりも、第一点火器３４及び第二点火器３６の一方が作動されてから他方が作動されるまでの遅延時間が長く設定される。これにより、シートベルトを着用することでエアバッグ７４に拘束されるまでに時間を要する場合でも、助手席の乗員を適切に保護することができる。 Further, when the collision speed V is equal to or higher than the second threshold value v2, 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.
　なお、上述のステップＳＴ２５～ステップＳＴ２７、ステップＳＴ２８～ステップＳＴ３０、ステップＳＴ３２～ステップＳＴ３４では、第一点火器３４が作動された後に一定の遅延時間が経過してから第二点火器３６が作動されていたが、第二点火器３６が作動された後に一定の遅延時間が経過してから第一点火器３４が作動されても良い。 In steps ST25 to ST27, steps ST28 to ST30, and steps ST32 to ST34 described above, the second igniter 36 is activated after a certain delay time has elapsed after the first igniter 34 is activated. However, the first igniter 34 may be activated after a certain delay time has elapsed after the second igniter 36 is activated.
　同様に、上述のステップＳＴ３５～ステップＳＴ３７では、第二点火器３６が作動された後に一定の遅延時間が経過してから第一点火器３４が作動されていたが、第一点火器３４が作動された後に一定の遅延時間が経過してから第二点火器３６が作動されても良い。 Similarly, in steps ST35 to ST37 described above, 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.
　また、上記各実施形態において、エアバッグユニット６２は、図５に示されるように、インストルメントパネル６６における助手席６８の前方に位置する部分に設けられていたが、その他にも、例えば、ステアリングホイールに設けられていても良い。つまり、エアバッグユニット６２は、助手席用として設けられる以外に、運転席用として設けられていても良い。 In each of the above embodiments, as shown in FIG. 5, 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.
　また、上記各実施形態において、制御ユニット６４におけるエアバッグ７４を膨張展開させるための処理機能は、プログラムとされていたが、ロジック回路とされていても良い。 In each of the above embodiments, 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.
　以上、本発明の一実施形態について説明したが、本発明は、上記に限定されるものでなく、上記以外にも、その主旨を逸脱しない範囲内において種々変形して実施可能であることは勿論である。 Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.
　以下、符合の説明を記す。
１０　インフレータ（エアバッグ用二段出力式インフレータ）
１２　下側ケース
１２Ａ　下側周壁部
１２Ｂ　底壁部
１２Ｅ　下側ケースにおける開口側の端部
１４　第一上側ケース
１４Ａ　第一上側周壁部
１４Ｂ　第一天井壁部
１４Ｃ　第一上側ケースにおける開口側の端部
１４Ｄ　第一ガス噴射孔
１４Ｅ　取付部
１４Ｆ　嵌合部
１４Ｇ　孔部
１４Ｈ　突条部（ケース固定部，フィルタ固定部）
１６　第二上側ケース
１６Ａ　第二上側周壁部
１６Ｂ　第二天井壁部
１６Ｃ　第二上側ケースにおける開口側の端部
１６Ｄ　第二ガス噴射孔
１６Ｅ　突条部（固定部）
１８　第一燃焼室
２０　第一ガス発生剤
２２　第二燃焼室
２４　第二ガス発生剤
２６　第一内筒部材
２６Ａ　下端部
２６Ｂ　上壁部
２６Ｃ　伝火孔
２８　第一伝火薬
３０　第二内筒部材
３０Ａ　下端部
３０Ｂ　上壁部
３０Ｃ　上部
３０Ｄ　伝火孔
３２　第二伝火薬
３４　第一点火器
３６　第二点火器
３８　第一フィルタ
４０　第二フィルタ
４０Ａ　第二フィルタにおける第一天井壁部側の端部
４０Ｂ　第二フィルタにおける第二天井壁部側の端部
６２　エアバッグユニット
６４　制御ユニット
６６　インストルメントパネル
６８　助手席
７４　エアバッグ
８４　減速度センサ
８６　シートベルトスイッチ
８８　シートベルト
１０２　体格センサ
Ｓ１，Ｓ２，Ｓ３　車両用エアバッグ装置 In the following, the description of the sign will be described.
10 Inflator (Two-stage output inflator for airbag)
12 Lower case 12A Lower peripheral wall portion 12B Bottom wall portion 12E Open end 14 in the lower case First upper case 14A First upper peripheral wall portion 14B First ceiling wall portion 14C Open end in the first upper case Part 14D First gas injection hole 14E Mounting part 14F Fitting part 14G Hole part 14H Projection part (case fixing part, filter fixing part)
16 2nd upper case 16A 2nd upper peripheral wall part 16B 2nd ceiling wall part 16C End part 16D of the opening side in 2nd upper case 2nd gas injection hole 16E Projection part (fixing part)
18 1st combustion chamber 20 1st gas generating agent 22 2nd combustion chamber 24 2nd gas generating agent 26 1st inner cylinder member 26A Lower end part 26B Upper wall part 26C Fire transfer hole 28 1st transfer powder 30 2nd inner cylinder member 30A Lower end part 30B Upper wall part 30C Upper part 30D Fire transfer hole 32 Second transfer charge 34 First igniter 36 Second igniter 38 First filter 40 Second filter 40A End part on the first ceiling wall part side in the second filter 40B End 62 on the second ceiling wall side of the second filter 62 Airbag unit 64 Control unit 66 Instrument panel 68 Passenger seat 74 Airbag 84 Deceleration sensor 86 Seat belt switch 88 Seat belt 102 Body size sensors S1, S2, S3 Airbag device for vehicle

Claims (11)

  1. 　筒状に形成された下側周壁部と、前記下側周壁部の下端部に形成された底壁部とを有するカップ状の下側ケースと、
    　第一ガス噴射孔が形成された第一上側周壁部と、前記第一上側周壁部の上端部に形成された第一天井壁部とを有する逆さカップ状とされると共に、開口側の端部が前記下側ケースにおける開口側の端部に固定され、前記下側ケースとで第一ガス発生剤を燃焼させる第一燃焼室を形成する第一上側ケースと、
    　第二ガス噴射孔が形成された第二上側周壁部と、前記第二上側周壁部の上端部に形成された第二天井壁部とを有する逆さカップ状とされると共に、前記第一上側ケースに対する前記下側ケースと反対側に設けられて開口側の端部が前記第一上側ケースに固定され、前記第一天井壁部とで第二ガス発生剤を燃焼させる第二燃焼室を形成する第二上側ケースと、
    　を備えたエアバッグ用二段出力式インフレータ。     A cup-shaped lower case having a lower peripheral wall portion formed in a cylindrical shape and a bottom wall portion formed at a lower end portion of the lower peripheral wall portion;
    The first upper peripheral wall portion in which the first gas injection hole is formed and the first ceiling wall portion formed at the upper end portion of the first upper peripheral wall portion are formed in an inverted cup shape, and the end portion on the opening side Is fixed to an end of the lower case on the opening side, and forms a first combustion chamber for burning the first gas generating agent with the lower case, and
    The first upper case is formed into an inverted cup shape having a second upper peripheral wall portion in which a second gas injection hole is formed and a second ceiling wall portion formed at an upper end portion of the second upper peripheral wall portion. An opening-side end portion is fixed to the first upper case, and a second combustion chamber for burning the second gas generating agent is formed with the first ceiling wall portion. A second upper case;
    -Stage inflator for airbags equipped with
  2. 　前記第一燃焼室に設けられると共に、前記第一燃焼室に収容された前記第一ガス発生剤を燃焼させるための第一伝火薬を収容し、上壁部が前記第一天井壁部に当接された第一内筒部材と、
    　前記第一天井壁部に形成された孔部の内周面と密着された状態で前記孔部に挿通されて、前記第一燃焼室から前記第二燃焼室に亘って設けられると共に、前記第二燃焼室に収容された前記第二ガス発生剤を燃焼させるための第二伝火薬を収容し、上壁部が前記第二天井壁部に当接された第二内筒部材と、
    　を備えた請求項１に記載のエアバッグ用二段出力式インフレータ。     The first combustion chamber is provided in the first combustion chamber and stores a first transfer charge for burning the first gas generating agent stored in the first combustion chamber, and the upper wall portion is in contact with the first ceiling wall portion. A contacted first inner cylinder member;
    The hole is inserted into the hole in close contact with the inner peripheral surface of the hole formed in the first ceiling wall, and is provided from the first combustion chamber to the second combustion chamber. A second inner cylinder member containing a second explosive for burning the second gas generating agent accommodated in the two combustion chambers, the upper wall portion being in contact with the second ceiling wall portion;
    A two-stage output inflator for an airbag according to claim 1, comprising:
  3. 　前記第一天井壁部から前記第二天井壁部側に突出されると共に、前記第二上側ケースにおける開口側の端部が嵌合されたケース固定部を備えた、
    　請求項１又は請求項２に記載のエアバッグ用二段出力式インフレータ。     A case fixing portion that protrudes from the first ceiling wall portion to the second ceiling wall portion side and that is fitted with an opening-side end portion in the second upper case,
    The two-stage output inflator for an airbag according to claim 1 or 2.
  4. 　前記第一燃焼室に収容されると共に、前記第一上側周壁部に沿って延びる環状に形成され、前記底壁部と前記第一天井壁部とに挟持された第一フィルタと、
    　前記第二燃焼室に収容されると共に、前記第二上側周壁部に沿って延びる環状に形成され、前記第一天井壁部と前記第二天井壁部とに挟持された第二フィルタと、
    　を備えた請求項１～請求項３のいずれか一項に記載のエアバッグ用二段出力式インフレータ。     A first filter housed in the first combustion chamber, 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;
    A second filter housed in the second combustion chamber and 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 two-stage output inflator for an airbag according to any one of claims 1 to 3, further comprising:
  5. 　前記第一天井壁部から突出され、前記第一フィルタ及び前記第二フィルタの少なくとも一方における前記第一天井壁部側の端部が嵌合されたフィルタ固定部を備えた、
    　請求項４に記載のエアバッグ用二段出力式インフレータ。     A filter fixing portion protruding from the first ceiling wall portion and fitted with an end portion on the first ceiling wall portion side in at least one of the first filter and the second filter;
    The two-stage output inflator for an airbag according to claim 4.
  6. 　前記第二天井壁部から前記第一天井壁部側に突出され、前記第二フィルタにおける前記第二天井壁部側の端部が嵌合された固定部を備えた、
    　請求項４又は請求項５に記載のエアバッグ用二段出力式インフレータ。     The first ceiling wall portion side is protruded from the second ceiling wall portion, and the second filter includes a fixing portion to which an end portion on the second ceiling wall portion side is fitted.
    The two-stage output type inflator for an airbag according to claim 4 or 5.
  7. 　前記第二燃焼室は、前記第一燃焼室よりも低出力に設定されている、
    　請求項１～請求項６のいずれか一項に記載のエアバッグ用二段出力式インフレータ。     The second combustion chamber is set to a lower output than the first combustion chamber.
    The two-stage output inflator for an airbag according to any one of claims 1 to 6.
  8. 　ガスの供給を受けて前席乗員に向けて膨張展開されるエアバッグと、
    　前記第一伝火薬に着火する第一点火器と、前記第二伝火薬に着火する第二点火器とを備え、前記エアバッグにガスを供給する請求項７に記載のエアバッグ用二段出力式インフレータと、
    　車両の前面衝突時に、車両の減速度に応じて減速度センサから出力された信号に基づいて衝突速度が第一閾値以上第二閾値未満であると判断した場合には、前記第二点火器を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記前席乗員によるシートベルトの着用の有無に応じてシートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していると判断したときには、前記第一点火器を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記シートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していないと判断したときには、前記第一点火器及び前記第二点火器を作動させて前記エアバッグを膨張展開させる制御ユニットと、
    　を備えた車両用エアバッグ装置。     An airbag that is inflated and deployed toward the front seat occupant upon receiving gas supply;
    The two-stage output for an airbag according to claim 7, comprising a first igniter for igniting the first transfer charge and a second igniter for igniting the second transfer charge, and supplying gas to the airbag. An expression inflator,
    When it is determined that the collision speed is greater than or equal to the first threshold and less than the second threshold based on a signal output from the deceleration sensor according to the deceleration of the vehicle at the time of a frontal collision of the vehicle, the second igniter is The airbag is operated to inflate and deploy, and when it is determined that the collision speed is equal to or higher than the second threshold based on a signal output from the deceleration sensor, the front seat occupant wears a seat belt When it is determined that the front seat occupant is wearing a seat belt based on the signal output from the seat belt switch according to the presence or absence of, the first igniter is operated to inflate and deploy the airbag, When 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 based on the signal output from the seat belt switch When the seat occupant is determined not to wear a seat belt, a control unit for inflating and deploying the air bag is actuated the first igniter and the second point firearms,
    A vehicle airbag device comprising:
  9. 　ガスの供給を受けて前席乗員に向けて膨張展開されるエアバッグと、
    　前記第一伝火薬に着火する第一点火器と、前記第二伝火薬に着火する第二点火器とを備え、前記エアバッグにガスを供給する請求項７に記載のエアバッグ用二段出力式インフレータと、
    　車両の前面衝突時に、車両の減速度に応じて減速度センサから出力された信号に基づいて衝突速度が第一閾値以上第二閾値未満であると判断した場合には、前記第二点火器を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記前席乗員の体格の大きさに応じて体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが基準値未満であると判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に一定の遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが前記基準値以上であると判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に前記一定の遅延時間よりも長い遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させる制御ユニットと、
    　を備えた車両用エアバッグ装置。     An air bag that is inflated and deployed toward the front seat occupant upon receiving gas supply;
    The two-stage output for an airbag according to claim 7, comprising a first igniter that ignites the first transfer charge and a second igniter that ignites the second transfer charge, and supplies gas to the airbag. An expression inflator,
    When it is determined that the collision speed is greater than or equal to the first threshold and less than the second threshold 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 is The airbag is operated to inflate and deploy, and when it is determined that the collision speed is equal to or higher than the second threshold based on a signal output from the deceleration sensor, the size of the physique of the front seat occupant When it is determined that the size of the front seat occupant is less than a reference value based on the signal output from the physique sensor, one of the first igniter and the second igniter is operated. After a certain delay time has elapsed, the other one of the first igniter and the second igniter is operated to inflate and deploy the airbag, and the collision speed is determined based on the signal output from the deceleration sensor. Above the second threshold If it is determined that the size of the physique of the front seat occupant is greater than or equal to the reference value based on a signal output from the physique sensor, 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 operating one of the igniters. When,
    A vehicle airbag device comprising:
  10. 　前記制御ユニットは、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが基準値未満であると判断し且つ前記前席乗員によるシートベルトの着用の有無に応じてシートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していないと判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に一定の遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させ、前記減速度センサから出力された信号に基づいて衝突速度が前記第二閾値以上であると判断した場合であって、前記体格センサから出力された信号に基づいて前記前席乗員の体格の大きさが基準値以上であると判断し且つ前記シートベルトスイッチから出力された信号に基づいて前記前席乗員がシートベルトを着用していないと判断したときには、前記第一点火器及び前記第二点火器の一方を作動させた後に前記一定の遅延時間よりも長い遅延時間が経過してから前記第一点火器及び前記第二点火器の他方を作動させて前記エアバッグを膨張展開させる、
    　請求項９に記載の車両用エアバッグ装置。     The control unit determines that the collision speed is greater than or equal to the second threshold value based on a signal output from the deceleration sensor, and is based on the signal output from the physique sensor. And the front seat occupant wears the seat belt based on a signal output from the seat belt switch according to whether the front seat occupant wears the seat belt. When it is determined that the first igniter and the second igniter are activated, the other one of the first igniter and the second igniter is activated after a certain delay time elapses after the one igniter is activated. 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 is output from the physique sensor. Based on the signal, the size of the front seat occupant is determined to be greater than or equal to a reference value, and based on the signal output from the seat belt switch, it is determined that the front seat occupant is not wearing a seat belt. Sometimes, after activating one of the first igniter and the second igniter, the other one of the first igniter and the second igniter is activated after a delay time longer than the certain delay time elapses. Let the airbag inflate and deploy,
    The airbag apparatus for vehicles of Claim 9.
  11. 　前記制御ユニットは、衝突速度が前記第二閾値以上であると判断した場合に、前記前席乗員がシートベルトを着用していると判断したときには、前記前席乗員がシートベルトを着用していないと判断したときよりも、前記第一点火器及び前記第二点火器の一方が作動されてから他方が作動されるまでの遅延時間を長く設定する、
    　請求項１０に記載の車両用エアバッグ装置。     When the control unit determines that the front seat occupant is wearing a seat belt when the collision speed is determined to be equal to or greater than the second threshold, the front seat occupant does not wear the seat belt. Rather than when it is determined that the delay time until one of the first igniter and the second igniter is activated until the other is activated,
    The vehicle airbag device according to claim 10.
PCT/JP2011/065892 2011-07-12 2011-07-12 Dual-stage-output inflator for airbag, and vehicle airbag device WO2013008316A1 (en)

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