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WO2011142395A1 - Générateur de gaz - Google Patents

Générateur de gaz Download PDF

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Publication number
WO2011142395A1
WO2011142395A1 PCT/JP2011/060877 JP2011060877W WO2011142395A1 WO 2011142395 A1 WO2011142395 A1 WO 2011142395A1 JP 2011060877 W JP2011060877 W JP 2011060877W WO 2011142395 A1 WO2011142395 A1 WO 2011142395A1
Authority
WO
WIPO (PCT)
Prior art keywords
cup
gas generator
gas
shaped member
fragile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/060877
Other languages
English (en)
Japanese (ja)
Inventor
一重 高柳
真也 上田
直樹 井崎
聡 青柳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Kayaku Co Ltd
Original Assignee
Nippon Kayaku Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010110980A external-priority patent/JP2011235837A/ja
Priority claimed from JP2010183744A external-priority patent/JP2012040943A/ja
Application filed by Nippon Kayaku Co Ltd filed Critical Nippon Kayaku Co Ltd
Publication of WO2011142395A1 publication Critical patent/WO2011142395A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
    • 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
    • B60R2021/26076—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 characterised by casing
    • 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
    • B60R2021/2642—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 comprising a plurality of combustion chambers or sub-chambers

Definitions

  • the present invention relates to a gas generator incorporated in an occupant protection device, and more specifically to a gas generator incorporated in an airbag device mounted on a steering wheel of an automobile.
  • airbag devices which are occupant protection devices, have been widely used from the viewpoint of protecting occupants of automobiles and the like.
  • the airbag device is equipped for the purpose of protecting the occupant from the impact generated when the vehicle or the like collides.
  • the airbag is inflated and deployed instantaneously when the vehicle or the like collides, so that the airbag becomes a cushion of the occupant. It is to catch the body.
  • the gas generator is incorporated in the airbag device, and igniters (squibs) are ignited by energization from the control unit (actuator) in the event of a vehicle collision, etc., and the gas generating agent is combusted by the flame generated in the igniter.
  • the airbag device is mounted on, for example, an automobile steering wheel or an instrument panel.
  • a disk-type gas generator As a gas generator that is suitably used for a driver side airbag device equipped on a steering wheel or the like.
  • a disk-type gas generator has a short cylindrical housing closed at both ends in the axial direction, a gas outlet is provided on the peripheral wall of the housing, and a gas generating agent, an igniter, and the like are accommodated inside the housing. It will be.
  • the combustion of the gas generating agent is designed to exhibit desired combustion characteristics so that a desired gas output suitable for inflation and deployment of the airbag can be obtained. is there.
  • flame energy generated in the igniter is transmitted to the gas generating agent with good controllability, and in particular, it is important to control the transmission of flame energy by the transfer agent.
  • an enhancer holder having a high mechanical strength such as a stainless steel alloy is used, and a predetermined size is provided at a predetermined position of the enhancer holder. By providing the opening, the transmission of flame energy due to the combustion of the explosive charge is controlled.
  • an enhancer holder having an opening as described above in order to prevent the transfer agent from moving to the combustion chamber or the gas generating agent from moving to the transfer chamber due to vibration or the like, It is necessary to close the opening with a member.
  • a member Normally, an aluminum foil with an adhesive member applied on one side is used as a sealing member that closes the opening.
  • the aluminum foil is very thin and difficult to handle, and the manufacturing process becomes complicated. is there.
  • an enhancer cup that has a low mechanical strength and is configured to burst or melt as ignition agent is ignited.
  • an enhancer cup it is not necessary to provide an opening in the enhancer cup in advance, and the above-described opening closing operation is not required, so that the manufacturing process can be greatly simplified.
  • the enhancer cup itself can be reduced in weight, and not only the weight of the gas generator can be reduced, but also the amount of material used. From the viewpoints of cost reduction and resource protection accompanying the reduction of the cost, it is very suitable.
  • the spread of the ignited gas generant is restricted by the partition wall by providing the partition in the combustion chamber so as to surround the enhancer cup.
  • the present invention has been made to solve the above-described problems, and the transmission of flame energy by a transfer agent is suitably controllable, and can be manufactured inexpensively and easily. It aims at providing the gas generator which does not produce.
  • the gas generator according to the present invention includes a housing, an igniter, and a cup-shaped member.
  • the housing is composed of a short cylindrical member composed of a top plate portion and a bottom plate portion that closes the end portion in the axial direction, and a peripheral wall portion provided with a gas outlet, and combustion in which a gas generating agent is accommodated Contains chambers inside.
  • the igniter includes an igniter that is attached to the bottom plate and contains an igniting agent that ignites during operation.
  • the cup-shaped member includes a heat transfer chamber in which a charge transfer material is accommodated, and has a bottomed cylindrical shape disposed so as to protrude toward the combustion chamber so that the heat transfer chamber faces the ignition part. It consists of a single member.
  • the cup-shaped member includes a thin fragile portion that bursts or melts due to combustion of the explosive agent accompanying the operation of the igniter, and a side wall portion that divides the transfer chamber and the combustion chamber. And a thick non-fragile portion that remains without being ruptured and melted by the combustion of the above-mentioned transfer charge.
  • the fragile portion reaches from the end portion on the top plate portion side of the cup-shaped member to an intermediate position of the side wall portion in the axial direction of the cup-shaped member. It is preferable that the non-fragile portion is provided so as to reach the end of the cup-shaped member on the bottom plate portion side from the midway position. In that case, it is preferable that the cup-shaped member is configured such that the midway position is positioned closer to the top plate part than the ignition part along the axial direction of the cup-shaped member.
  • the fragile portion is provided in an annular shape along the circumferential direction of the cup-shaped member at an intermediate position of the side wall portion in the axial direction of the cup-shaped member. It is preferable that the brittle portion is sandwiched and positioned along the axial direction of the cup-shaped member. In that case, it is preferable that the said weak part is comprised by the groove
  • the cup-shaped member is preferably a press-formed product made of aluminum or aluminum alloy.
  • a light-weight gas generator that can suitably control the transmission of flame energy by a charge transfer agent, can be manufactured inexpensively, and does not vary in output characteristics.
  • FIG. 1 is a schematic cross section of the gas generator in Embodiment 1 of the present invention. It is a schematic cross section of the gas generator which concerns on the modification of Embodiment 1 of this invention. It is a graph which shows the result of having performed the performance test of the gas generator which concerns on Examples 1, 2 and Comparative Example 1. FIG. It is a graph which shows the result of having performed the performance test of the gas generator which concerns on Examples 1, 2 and Comparative Example 1.
  • FIG. 3 is a schematic cross-sectional view of a gas generator according to Comparative Example 1.
  • FIG. 6 is a schematic cross-sectional view of a gas generator according to Comparative Example 2.
  • FIG. 1 is a schematic cross-sectional view of a gas generator in Embodiment 1 of the present invention. First, the structure of the gas generator 1A in the present embodiment will be described with reference to FIG.
  • the gas generator 1A has a short cylindrical housing closed at both ends in the axial direction, and various components are accommodated inside the housing. Yes.
  • the housing is formed by combining an initiator shell 10 and a closure shell 20 each formed in a bottomed cylindrical shape. More specifically, the initiator shell 10 has a bottom plate portion 11 and a peripheral wall portion 12, and the closure shell 20 has a top plate portion 21 and a peripheral wall portion 22. By being combined so that the open ends of the closure shell 20 face each other, a space for accommodating various components is formed therein.
  • the initiator shell 10 and the closure shell 20 are each composed of a metal member such as stainless steel, steel, an aluminum alloy, or a stainless alloy. More specifically, the initiator shell 10 and the closure shell 20 are each forged, drawn, or pressed from a single plate or piece of block-like metal member using a die or the like corresponding to each part. By combining processing and the like, molding is performed by repeated pressurization and flow. For joining the initiator shell 10 and the closure shell 20, electron beam welding, laser welding, friction welding, or the like is preferably used.
  • a holding portion 13 is formed at a substantially central portion of the bottom plate portion 11 of the initiator shell 10.
  • the holding unit 13 is a part for holding the igniter 30 when the igniter 30 is inserted.
  • the igniter 30 is attached to the holding unit 13 from the inside of the initiator shell 10 so that the terminal pin 32 of the igniter 30 is inserted into the opening provided in the holding unit 13.
  • the igniter 30 is caulked and fixed to the holding portion 13 of the initiator shell 10 by caulking the caulking portion 14 a provided at the tip toward the igniter 30 side.
  • a harness connector (not shown) for connecting the igniter 30 and the control unit is connected to the terminal pin 32 disposed so as to be exposed to the outside of the housing.
  • the igniter 30 is an ignition device for generating a flame, and includes an ignition unit 31 and the terminal pin 32 described above.
  • the ignition unit 31 includes therein an igniting agent that ignites during operation and a resistor for burning the igniting agent.
  • the terminal pin 32 is connected to the ignition unit 31 in order to ignite the igniting agent.
  • the igniter 30 includes a base portion through which a pair of terminal pins 32 are inserted and held, and a squib cup attached to the base portion, and the terminal pins 32 inserted into the squib cup.
  • a resistor bridge wire
  • an igniting agent is filled in the squib cup so as to surround the resistor or in contact with the resistor.
  • Nichrome wire or the like is generally used as the resistor, and ZPP (zirconium / potassium perchlorate), ZWPP (zirconium / tungsten / potassium perchlorate), lead tricinate, or the like is generally used as the igniting agent.
  • the squib cup is generally made of metal or plastic.
  • a predetermined amount of current flows through the resistor via the terminal pin 32.
  • Joule heat is generated in the resistor, and the ignition agent starts burning.
  • the high temperature flame generated by the combustion ruptures the squib cup containing the igniting agent.
  • the time from when the current flows through the resistor until the igniter 30 is activated is generally 2 milliseconds or less when a nichrome wire is used as the resistor.
  • a seal member 33 is interposed between the igniter 30 and the holding unit 13.
  • the seal member 33 is for hermetically sealing a gap generated between the igniter 30 and the holding unit 13 to hermetically seal a transfer chamber 44 described later, and the igniter 30 is caulked to the holding unit 13. When it is fixed, it is inserted into the gap.
  • the seal member 33 is preferably made of a material having sufficient heat resistance and durability. For example, an O-ring made of EPDM resin, which is a kind of ethylene propylene rubber, is preferably used.
  • the liquid sealing agent is separately applied to the portion where the sealing member 33 is interposed, the sealing performance of the fire transfer chamber 44 can be further improved.
  • An enhancer cup 40 as a bottomed cylindrical cup-shaped member is fixed to the holding portion 13 of the initiator shell 10 so as to cover the igniter 30.
  • the enhancer cup 40 has a top wall portion 41, a side wall portion 42, and a flange portion 43, and includes a fire transfer chamber 44 in which a charge transfer agent 34 is accommodated.
  • the enhancer cup 40 is a member for partitioning the fire transfer chamber 44 and a combustion chamber 50 described later, and is a press-formed product formed by pressing a single plate-shaped or one-piece block-shaped metal member. Consists of.
  • the enhancer cup 40 is composed of a single member (that is, one part), and is fixed to the holding unit 13 so that the heat transfer chamber 44 provided in the enhancer cup 40 faces the ignition unit 31. More specifically, the enhancer cup 40 is fixed to the holding portion 13 by caulking the flange portion 43 of the enhancer cup 40 by the caulking portion 14 b provided in the holding portion 13.
  • the enhancer cup 40 has no opening in either the top wall portion 41 or the side wall portion 42, and the enhancer cup 40 is fixed to the holding portion 13 of the initiator shell 10 and the transmission provided in the enhancer cup 40.
  • the fire chamber 44 is completely sealed.
  • the enhancer cup 40 ruptures or melts partly with the increase in pressure in the transfer chamber 44 and the conduction of generated heat when the transfer powder 34 is ignited by the operation of the igniter 30.
  • the mechanical strength is lower than that of a conventional stainless steel enhancer cup.
  • metal is preferably used, and aluminum, aluminum alloy, and the like are particularly preferably used from the viewpoints of formability and weight reduction during press working.
  • the side wall portion 42 of the enhancer cup 40 is provided with a thin fragile portion 42a and a thick non-fragile portion 42b.
  • the thin fragile portion 42a is located at an intermediate position of the side wall portion 42 in the axial direction of the enhancer cup 40 from the end portion on the top plate portion 21 side of the enhancer cup 40 (that is, the axial direction end portion on the top wall portion 41 side of the side wall portion 42). (When the top surface of the top wall portion 41 is used as a reference, the height is provided so as to reach a position where the height is h1 in the drawing).
  • the thick non-fragile portion 42b is provided so as to reach the end portion on the bottom plate portion 11 side of the enhancer cup 40 (that is, the axial end portion on the flange portion 43 side of the side wall portion 42) from the midway position. Yes.
  • the fragile portion 42a is configured to be ruptured or melted by the combustion of the charge transfer 34 accompanying the operation of the igniter 30 by forming the fragile portion 42a thinner than the non-fragile portion 42b.
  • the non-fragile portion 42b is configured to remain without being ruptured and melted by the combustion of the charge transfer 34 accompanying the operation of the igniter 30 by being formed thicker than the fragile portion 42a. Has been.
  • the thickness t12 of the weak part mentioned above and the thickness t13 of a non-fragile part are adjusted suitably based on the kind, filling amount, etc. of the explosive 34 used, the example is shown below.
  • the thickness t12 of the fragile portion 42a is 1.0 mm or less, preferably 0.5 mm or less, and more preferably 0.3 mm or less. It is said.
  • the thickness t13 of the non-fragile portion 42b is 0.5 mm or more and 1.2 mm or less on condition that the thickness t13 is larger than the thickness t12 of the fragile portion 42a.
  • the thickness t11 of the top wall portion 41 of the enhancer cup 40 is not particularly limited. However, when the formability during press molding is taken into consideration, the thickness t11 is approximately equal to the thickness t13 of the non-fragile portion 42b. It is preferable. However, when the thickness t11 of the top wall portion 41 is set to be approximately equal to the thickness t12 of the fragile portion 42a, the top wall portion 41 is also ruptured or burned by the combustion of the transfer charge 34 accompanying the operation of the igniter 30. It will function as a fragile part that melts.
  • the explosive charge 34 filled in the heat transfer chamber 44 is ignited by a flame generated by the operation of the igniter 30 and burns to generate hot particles.
  • the charge transfer agent 34 must be capable of reliably starting the combustion of a gas generating agent 51 to be described later.
  • a gas generating agent 51 to be described later.
  • the metal powder / oxidant represented by B / KNO 3 or the like represented by B / KNO 3 or the like.
  • the composition etc. which become are used.
  • As the explosive charge 34 a powdery one, a one formed into a predetermined shape by a binder, or the like is used.
  • Examples of the shape of the charge transfer agent formed by the binder include various shapes such as a granular shape, a columnar shape, a sheet shape, a spherical shape, a single-hole cylindrical shape, a porous cylindrical shape, and a tablet shape.
  • the combustion chamber 50 in which the gas generating agent 51 is accommodated is located in the space surrounding the portion where the enhancer cup 40 is arranged in the space inside the housing formed of the initiator shell 10 and the closure shell 20. More specifically, the above-described enhancer cup 40 is disposed so as to protrude into a combustion chamber 50 formed inside the housing, and a portion and a side wall facing the outer surface of the top wall portion 41 of the enhancer cup 40. A space provided in a portion facing the outer surface of the portion 42 is configured as a combustion chamber 50.
  • the gas generating agent 51 is accommodated only in the space of the combustion chamber 50 that faces the outer surface of the side wall portion 42 of the enhancer cup 40.
  • a filter 55 is disposed along the inner periphery of the housing.
  • the filter 55 has a cylindrical shape, and the center axis thereof is disposed so as to substantially coincide with the axial direction of the housing.
  • the gas generating agent 51 is ignited by the hot particles generated by the combustion of the charge transfer agent 34 ignited by the igniter 30, and generates gas by burning.
  • the gas generating agent 51 is preferably a non-azide gas generating agent, and is generally formed as a molded body containing a fuel, an oxidant, and an additive.
  • a fuel for example, a triazole derivative, a tetrazole derivative, a guanidine derivative, an azodicarbonamide derivative, a hydrazine derivative, or a combination thereof is used.
  • nitroguanidine, guanidine nitrate, cyanoguanidine, 5-aminotetrazole and the like are preferably used.
  • nitrate containing a cation selected from alkali metals, alkaline earth metals, transition metals, and ammonia is used.
  • nitrate for example, sodium nitrate, potassium nitrate and the like are preferably used.
  • examples of the additive include a binder, a slag forming agent, and a combustion adjusting agent.
  • the binder for example, an organic binder such as a metal salt of carboxymethyl cellulose or a stearate, or an inorganic binder such as synthetic hydroxytalcite or acidic clay can be suitably used.
  • the slag forming agent silicon nitride, silica, acid clay, etc. can be suitably used.
  • a combustion regulator a metal oxide, ferrosilicon, activated carbon, graphite, etc. can be used suitably.
  • the shape of the molded body of the gas generating agent 51 includes various shapes such as granular shapes, pellet shapes, cylindrical shapes such as columnar shapes, and disk shapes.
  • a porous for example, a single-hole cylindrical shape or a porous cylindrical shape
  • These shapes are preferably selected as appropriate according to the specifications of the airbag apparatus in which the gas generator 1A is incorporated.
  • the shape in which the gas generation rate changes with time during the combustion of the gas generating agent 51 is selected. It is preferable to select an optimal shape according to the specifications.
  • the filter 55 is, for example, one obtained by winding and sintering a metal wire such as stainless steel or steel, one obtained by pressing a net material knitted with a metal wire, or by winding a perforated metal plate. Things are used.
  • a metal wire such as stainless steel or steel
  • a net material specifically, a knit metal mesh, a plain weave metal mesh, an assembly of crimped metal wires, or the like is used.
  • a perforated metal plate for example, expanded metal that has been cut into a zigzag pattern on the metal plate and expanded to form a hole and processed into a mesh shape, or a hole is formed in the metal plate and at that time
  • a hook metal or the like obtained by flattening the burr generated at the periphery of the hole is used.
  • the size and shape of the hole to be formed can be appropriately changed as necessary, and holes of different sizes and shapes may be included on the same metal plate.
  • a metal plate a steel plate (mild steel), a stainless steel plate, for example can be used suitably, and nonferrous metal plates, such as aluminum, copper, titanium, nickel, or these alloys, can also be utilized.
  • the filter 55 When the working gas generated in the combustion chamber 50 passes through the filter 55, the filter 55 functions as a cooling means that cools the working gas by taking high-temperature heat of the working gas, and in the working gas. It also functions as a removing means for removing the residue (slag) and the like contained in. Therefore, in order to sufficiently cool the working gas and prevent the residue from being discharged to the outside, it is necessary to ensure that the working gas generated in the combustion chamber 50 passes through the filter 55. is there.
  • a plurality of gas outlets 23 are provided on the peripheral wall 22 of the closure shell 20 that faces the filter 55.
  • the gas outlet 23 is for leading the working gas that has passed through the filter 55 to the outside of the housing.
  • a seal member 24 is affixed to the main surface located on the filter 55 side of the peripheral wall portion 22 of the closure shell 20 so as to close the gas ejection port 23.
  • a closure shell side holding member 52 for fixing the upper end of the filter 55 to the housing is disposed at the end of the closure shell 20 on the top plate portion 21 side in the space inside the housing.
  • the closure shell side holding member 52 has a portion that comes into contact with the top plate portion 21 of the closure shell 20 and a portion that comes into contact with the inner peripheral surface of the upper end portion of the filter 55.
  • a cushion member 53 is disposed inside the closure shell side holding member 52 so as to come into contact with the gas generating agent 51 accommodated in the combustion chamber 50.
  • the cushion material 53 is provided for the purpose of preventing the gas generating agent 51 made of a molded body from being pulverized by vibration or the like, and a ceramic fiber molded body, foamed silicon, or the like is preferably used.
  • an initiator shell side holding member 54 for fixing the lower end of the filter 55 to the housing is disposed at the end of the initiator shell 10 on the bottom plate portion 11 side in the space inside the housing.
  • the initiator shell side holding member 54 has a portion that contacts the inner bottom surface of the bottom plate portion 11 of the initiator shell 10 and a portion that contacts the inner peripheral surface of the lower end portion of the filter 55.
  • the closure shell side holding member 52 and the initiator shell side holding member 54 are formed by, for example, pressing a single metal plate-like member, and preferably steel plates such as ordinary steel and special steel. (For example, a cold rolled steel plate (SPCC), a stainless steel plate (SUS304), etc.) is used. Since the closure shell side holding member 52 and the initiator shell side holding member 54 are formed by bending a part of the metal plate-like member as described above, the closure shell side holding member 52 and the initiator shell side holding member 54 are held. Each member 54 has appropriate elasticity. Therefore, the closure shell side holding member 52 and the initiator shell side holding member 54 are in appropriate pressure contact with the inner peripheral surface of the filter 55, whereby the filter 55 is held and fixed by the housing. .
  • SPCC cold rolled steel plate
  • SUS304 stainless steel plate
  • Each of the closure shell side holding member 52 and the initiator shell side holding member 54 includes a gap between the upper end of the filter 55 and the top plate portion 21 of the closure shell 20 and the lower end of the filter 55 and the bottom plate portion 11 of the initiator shell 10. It also functions to prevent the outflow of gas from the gap between the two.
  • the igniter 30 is caulked and fixed by attaching the seal member 33 to the holding portion 13 of the initiator shell 10.
  • the enhancer cup 40 in which the transfer charge 34 is accommodated is caulked and fixed to the holding portion 13 of the initiator shell 10.
  • the initiator shell side holding member 54 and the filter 55 are inserted and arranged toward the inner bottom surface of the initiator shell 10.
  • the gas generating agent 51 is filled inside the filter 55, and the closure shell side holding member 52 interposing the cushion material 53 is inserted into the upper end portion of the filter 55. Thereafter, the closure shell 20 whose gas outlet 23 is closed by the seal member 24 is placed on the initiator shell 10, and the initiator shell 10 and the closure shell 20 are welded together. Thus, the assembly of the gas generator 1A having the structure shown in FIG. 1 is completed.
  • the enhancer cup 40 since the enhancer cup 40 is not provided with an opening, the process of filling the transfer chamber 44 provided in the enhancer cup 40 with the transfer agent 34 is extremely necessary. Easy to do. This is because the enhancer cup 40 itself is composed of a fragile member having low mechanical strength so that a part of the enhancer cup 40 is ruptured or melted during operation of the gas generator 1A. That is, an operation for closing the opening provided in the enhancer cup to fill the explosive charge, which is necessary when using the enhancer holder having the opening as disclosed in the above-mentioned JP-A-2002-370607. This eliminates the need for this and greatly simplifies the manufacturing process.
  • the collision is detected by the collision detection means provided separately in the vehicle, and the igniter 30 is operated based on this.
  • the charge transfer agent 34 accommodated in the transfer chamber 44 is ignited and burned by the flame generated by the operation of the igniter 30, and generates a large amount of heat particles.
  • the pressure in the enhancer cup 40 increases due to the combustion of the charge transfer agent 34, the weakened portion 42 a of the enhancer cup 40 is ruptured or melted by the pressure or heat, and the above-described hot particles flow into the combustion chamber 50. At this time, the non-fragile portion 42b of the enhancer cup 40 remains without being ruptured and melted.
  • the gas generating agent 51 accommodated in the combustion chamber 50 is ignited and burned by the flowing heat particles, and a large amount of working gas is generated.
  • the working gas generated in the combustion chamber 50 passes through the filter 55. At that time, heat is taken away by the filter 55 and cooled, and the residue contained in the working gas is removed by the filter 55.
  • the working gas after passing through the filter 55 flows into the outer peripheral edge of the housing, and then is ejected from the gas ejection port 23 provided in the peripheral wall portion 22 of the closure shell 20 to the outside of the housing.
  • the jetted gas is introduced into an airbag provided adjacent to the gas generator 1A, and the airbag is inflated and deployed.
  • the thickness t12 of the side wall portion 42 near the top wall portion 41 of the enhancer cup 40 is made thinner than other portions.
  • the weak part 42b is comprised by comprising the weak part 42a and making thickness t13 of the part which the side wall part 42 of the enhancer cup 40 remains thicker than the thickness t12 of the said weak part 42a.
  • the position at which the boundary portion between the fragile portion 42a and the non-fragile portion 42b is not particularly limited, but the closure shell 20 is more than the igniter portion 31 of the igniter 30 along the axial direction of the enhancer cup 40. It is preferable to be on the top plate portion 21 side.
  • the height h1 of the boundary portion with respect to the upper surface of the top wall portion 41 of the enhancer cup 40 is smaller than the height H1 of the upper surface of the ignition portion 31 with respect to the upper surface. (That is, satisfying the condition of h1 ⁇ H1).
  • the gas generating agent 51 is rapidly burned by providing the enhancer cup 40 with the fragile portion 42a and the non-fragile portion 42b and appropriately adjusting the position and size of the fragile portion 42a and the non-fragile portion 42b.
  • the combustion progress can be intentionally delayed, and it is very easy to optimize the gas output adjustment according to the specifications, such as maintaining the gas output for a predetermined time. It will be.
  • the fragile portion 42a is ruptured or melted when the transfer charge 34 is ignited, so that the top wall portion 41 is detached from the non-fragile portion 42b toward the top plate portion 21 side of the housing. Therefore, the gas output is not delayed when the enhancer holder as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2002-370607 is used.
  • the gas generator 1A in the present embodiment it is possible to suitably control the transmission of the flame energy by the charge transfer agent, and it is possible to produce light weight and output characteristics that can be easily and inexpensively manufactured. It is possible to provide a gas generator in which no variation occurs.
  • FIG. 2 is a schematic cross-sectional view of a gas generator according to a modification of the first embodiment of the present invention.
  • the boundary portion between the fragile portion 42a and the non-fragile portion 42b is disposed at a position near the substantially central portion of the enhancer cup 40 in the axial direction.
  • the size of the fragile portion 42a becomes larger than in the case of the gas generator 1A in the present embodiment described above, and the transfer charge 34 is caused by the operation of the igniter 30.
  • the non-fragile portion 42b remaining without being ruptured and melted is reduced, and the flame flowing into the combustion chamber 50 is increased from the upper end portion of the enhancer cup 40 to the position near the central portion. Will be.
  • the spread of the gas generating agent 51 progresses radially centering on the upper end portion and the substantially central portion of the transfer chamber 44, compared to the gas generator 1A in the present embodiment described above, at the initial operation time. Gas output can be increased. Note that the spread of the gas generating agent 51 is schematically represented by broken-line arrows in FIG.
  • the non-fragile portion 42b remains without being ruptured and melted, so that all of the gas generating agent 51 adjacent to the enhancer cup 40 is not simultaneously ignited at the same time. It is possible to intentionally delay the progress of the combustion by preventing the agent 51 from burning rapidly.
  • FIGS. 3 and 4 show the gas generators according to Examples 1 and 2 and Comparative Example 1, respectively, and adjust the combustion characteristics of the gas generant by applying the present invention by operating them. It is a graph which shows the result of the test which verified whether it became possible.
  • the graph shown in FIG. 3 shows the tank internal pressure [kPa] on the vertical axis and the time [ms] on the horizontal axis
  • the graph shown in FIG. 4 shows the working gas from the gas outlet on the vertical axis.
  • the ejection amount [mol / s] is obtained by taking time [ms] on the horizontal axis.
  • FIG. 5 is a schematic cross-sectional view showing the structure of the gas generator according to Comparative Example 1.
  • a gas generator according to Examples 1 and 2 based on the present invention and a gas generator according to Comparative Example 1 not based on the present invention are prepared, and these are hermetically sealed to a predetermined capacity.
  • the output performance of each gas generator was evaluated by installing each in a tank and operating each of them and measuring the pressure in the tank over time. At that time, the amount of the working gas ejected was calculated based on the gas state equation from the change in the tank pressure.
  • the capacity of the tank used was 60 liters, and the ambient temperature was a room temperature environment (about 23 ° C.).
  • the same amount of the same type of transfer charge and gas generating agent was used, and the structures other than the shape of the enhancer cup were all the same.
  • the gas generator 1X having the structure shown in FIG. 5 was used. That is, in the gas generator 1X according to the comparative example 1, the enhancer cup 40 is configured such that the side wall portion 42 becomes a fragile portion (that is, non-fragile that does not rupture or melt even by combustion of the charge transfer agent 34). Used). In the gas generator 1X according to the comparative example 1, since all the portions of the side wall portion 42 are configured to be fragile, the spreading of the gas generating agent 51 is caused by the upper end portion, the substantially central portion, and the lower end portion of the fire transfer chamber 44. It progresses radially around all of the above. Note that the spread of the gas generating agent 51 is schematically represented by broken-line arrows in FIG.
  • the enhancer cup 40 made of aluminum is used in the structure shown in FIG. 1 described above, the thickness t12 of the fragile portion 42a is set to 0.3 mm, and the thickness t13 of the non-fragile portion 42b is set. 1.0 mm. About the position of the boundary part of the weak part 42a and the non-fragile part 42b, it was set as the position where the height h1 shown in FIG. 1 will be 4.0 mm. In addition, the full length along the axial direction of the enhancer cup 40 was 30.0 mm, and the internal diameter was 14.0 mm. Moreover, the thickness t11 of the top wall part 41 was 1.2 mm, and the thickness of the flange part 43 was 1.0 mm.
  • the aluminum enhancer cup 40 is used, the thickness t12 of the fragile portion 42a is set to 0.3 mm, and the thickness t13 of the non-fragile portion 42b is set. 1.0 mm.
  • the full length along the axial direction of the enhancer cup 40 was 30.0 mm, and the internal diameter was 14.0 mm.
  • the thickness t11 of the top wall part 41 was 1.2 mm, and the thickness of the flange part 43 was 1.0 mm.
  • the enhancer cup 40 made of aluminum was used in the structure shown in FIG. 5 described above, and the thickness t14 of the side wall portion 42 was set to 0.15 mm.
  • the full length along the axial direction of the enhancer cup 40 was 33.0 mm, and the inner diameter was 14.0 mm.
  • the thickness t11 of the top wall part 41 was 0.15 mm
  • the thickness of the flange part 43 was 0.18 mm.
  • Example 1 and Example 2 it can be seen that the pressure rise is not as steep as in Comparative Example 1, and a gentle pressure rise occurs. That is, as shown in FIG. 4, in Example 1 and Example 2, compared to Comparative Example 1, a relatively high gas ejection amount is obtained even after the time when the working gas ejection amount per unit time becomes maximum. It can be seen that it can be obtained over a period of time.
  • pressure is adjusted by adjusting the position of the boundary portion between the fragile portion 42 a and the non-fragile portion 42 b (ie, adjusting the size of the fragile portion 42 a and the non-fragile portion 42 b). It can also be seen that it is possible to easily control the degree of the rise of.
  • FIG. 6 is a schematic cross-sectional view of a gas generator according to Embodiment 2 of the present invention.
  • symbol is attached
  • the gas generator 1 ⁇ / b> C As shown in FIG. 6, in the gas generator 1 ⁇ / b> C according to the present embodiment, not only the combustion chamber 50 of the portion facing the outer surface of the side wall portion 42 of the enhancer cup 40 but also the top wall portion of the enhancer cup 40.
  • the gas generating agent 51 is also accommodated in the combustion chamber 50 of the portion facing the outer surface of 41. That is, the gas generator 1 ⁇ / b> C according to the present embodiment has a structure in which the gas generating agent 51 is accommodated in all portions of the combustion chamber 50 that is a space surrounding the enhancer cup 40.
  • the non-fragile portion 42b remains without being ruptured and melted during operation, and the enhancer cup 40 All of the gas generating agents 51 adjacent to the gas generating agent 51 are not ignited at the same time, and the gas generating agent 51 can be prevented from burning rapidly and the progress of the combustion can be intentionally delayed. Therefore, it is very easy to optimize the adjustment of the gas output such as maintaining the gas output for a predetermined time according to the specification.
  • FIG. 7 is a schematic cross-sectional view of a gas generator according to Embodiment 3 of the present invention.
  • the structure of gas generator 1D in this Embodiment is demonstrated.
  • symbol is attached
  • a thin fragile portion 42a and a pair of thick non-fragile portions 42b1 and 42b2 are provided on the side wall portion 42 of the enhancer cup 40.
  • the fragile portion 42a is a thin portion of the enhancer cup 40 formed by providing an annular groove on the outer peripheral surface of the side wall portion 42 of the enhancer cup 40 so as to extend along the circumferential direction.
  • the non-fragile portions 42b1 and 42b2 are configured by thick portions of the enhancer cup 40 that are not provided with the annular groove.
  • the thin fragile portion 42a is provided at an intermediate position of the side wall portion 42 in the axial direction of the enhancer cup 40 (a position where the height is h2 in the drawing when the top surface of the top wall portion 41 is used as a reference). Yes.
  • one non-fragile portion 42b1 is provided so as to reach the axial end on the flange 43 side of the side wall portion 42 of the enhancer cup 40 from the middle position, and the other non-fragile portion 42b2
  • the intermediate wall is provided so as to reach the axial end on the top wall 41 side of the side wall 42 of the enhancer cup 40 from the midway position.
  • the thin fragile portion 42 a is positioned between the pair of thick non-fragile portions 42 b 1 and 42 b 2 along the axial direction of the enhancer cup 40.
  • the position where the fragile portion 42a is provided is a position near the top wall portion 41 in the axial direction of the enhancer cup 40.
  • the fragile portion 42a is configured to be ruptured or melted by the combustion of the transfer charge 34 accompanying the operation of the igniter 30 by being formed thinner than the non-fragile portions 42b1 and 42b2. Yes.
  • the non-fragile portions 42b1 and 42b2 are formed so as to be thicker than the fragile portion 42a, so that the non-fragile portions 42b1 and 42b2 remain without being ruptured and melted by combustion of the charge transfer agent 34 accompanying the operation of the igniter 30. It is configured.
  • the thickness t22 of the weak part 42a mentioned above and the thickness t23, t24 of the non-fragile parts 42b1 and 42b2 are suitably adjusted based on the kind, filling amount, etc. of the explosive 34 used, the example Is shown below.
  • the thickness t22 of the fragile portion 42a is 1.0 mm or less, preferably 0.5 mm or less, and more preferably 0.3 mm or less. It is said.
  • the thicknesses t23 and t24 of the non-fragile portions 42b1 and 42b2 are 0.5 mm or more on condition that they are larger than the thickness t22 of the fragile portion 42a. It is set to 1.2 mm or less, preferably 0.5 mm to 1.0 mm, and more preferably 0.6 mm to 0.9 mm.
  • the thickness t21 of the top wall portion 41 of the enhancer cup 40 is not particularly limited. However, when the formability during press molding is taken into consideration, the thicknesses t23 and t24 of the non-fragile portions 42b1 and 42b2 It is preferable that the degree is equivalent.
  • the igniter 30 is caulked and fixed by attaching the seal member 33 to the holding portion 13 of the initiator shell 10.
  • the enhancer cup 40 in which the transfer charge 34 is accommodated is caulked and fixed to the holding portion 13 of the initiator shell 10.
  • the initiator shell side holding member 54 and the filter 55 are inserted and arranged toward the inner bottom surface of the initiator shell 10.
  • the gas generating agent 51 is filled inside the filter 55, and the closure shell side holding member 52 interposing the cushion material 53 is inserted into the upper end portion of the filter 55. Thereafter, the closure shell 20 whose gas outlet 23 is closed by the seal member 24 is placed on the initiator shell 10, and the initiator shell 10 and the closure shell 20 are welded together. Thus, the assembly of the gas generator 1D having the structure shown in FIG. 7 is completed.
  • the enhancer cup 40 since the enhancer cup 40 is not provided with an opening, the process of filling the transfer chamber 44 provided in the enhancer cup 40 with the transfer agent 34 is extremely necessary. Easy to do. This is because the enhancer cup 40 itself is composed of a fragile member having low mechanical strength so that a part of the enhancer cup 40 is ruptured or melted during operation of the gas generator 1D. That is, an operation for closing the opening provided in the enhancer cup to fill the explosive charge, which is necessary when using the enhancer holder having the opening as disclosed in the above-mentioned JP-A-2002-370607. This eliminates the need for this and greatly simplifies the manufacturing process.
  • FIG. 8 is a schematic cross-sectional view showing the behavior of the cup-shaped member during operation of the gas generator in the present embodiment. Next, with reference to this FIG. 8, the operation
  • the collision is detected by a collision detection unit provided separately in the vehicle, and the igniter 30 is activated based on this.
  • the charge transfer agent 34 accommodated in the transfer chamber 44 is ignited and burned by the flame generated by the operation of the igniter 30, and generates a large amount of heat particles.
  • the pressure in the enhancer cup 40 increases due to the combustion of the charge transfer agent 34, the weakened portion 42 a of the enhancer cup 40 is ruptured or melted by the pressure or heat, and the above-described hot particles flow into the combustion chamber 50. At this time, the non-fragile portions 42b1 and 42b2 of the enhancer cup 40 will remain without being ruptured and melted.
  • the air is blown toward the closure shell 20 side.
  • the gas generating agent 51 accommodated in the combustion chamber 50 is ignited and burned by the flowing heat particles, and a large amount of working gas is generated.
  • the working gas generated in the combustion chamber 50 passes through the filter 55. At that time, heat is taken away by the filter 55 and cooled, and the residue contained in the working gas is removed by the filter 55.
  • the working gas after passing through the filter 55 flows into the outer peripheral edge of the housing, and then is ejected from the gas ejection port 23 provided in the peripheral wall portion 22 of the closure shell 20 to the outside of the housing.
  • the jetted gas is introduced into the inside of an airbag provided adjacent to the gas generator 1D, and the airbag is inflated and deployed.
  • the weakened portion is obtained by making the thickness t ⁇ b> 22 at the midway position of the side wall portion 42 in the axial direction of the enhancer cup 40 thinner than other portions.
  • the non-fragile portions 42b1 and 42b2 are configured by forming the thickness 42a of the enhancer cup 40 and making the remaining portions t23 and t24 of the side wall portion 42 thicker than the thickness t22 of the weakened portion 42a.
  • the position at which the fragile portion 42 a is provided is not particularly limited, but is closer to the top plate portion 21 side of the closure shell 20 than the ignition portion 31 of the igniter 30 along the axial direction of the enhancer cup 40. It is preferable.
  • the height h2 of the intermediate position when the upper surface of the top wall portion 41 of the enhancer cup 40 is used as a reference takes a value smaller than the height H2 of the upper surface of the ignition unit 31 when the upper surface is used as a reference. (That is, it satisfies the condition of h2 ⁇ H2).
  • the flame flowing into the combustion chamber 50 is throttled by the gap generated between the non-fragile portion 42b1 and the moved non-fragile portion 42b2, and all of the gas generant 51 adjacent to the enhancer cup 40 Are not ignited simultaneously at the same time, and the spread of the gas generating agent 51 proceeds radially around the gap.
  • the spread of the gas generating agent 51 is schematically represented by broken-line arrows in FIG.
  • the axial size d2 (see FIG. 8) of the gap generated between the non-fragile portion 42b1 and the moved non-fragile portion 42b2 is the upper surface of the top wall portion 41 of the enhancer cup 40 during non-operation.
  • the distance D2 (see FIG. 7) between the inner surface of the closure shell 20 (more specifically, the lower surface of the closure shell side holding member 52) and the axial size w2 of the fragile portion 42a (see FIG. 7). Determined. Therefore, the fragile portion 42a and the non-fragile portions 42b1 and 42b2 are provided in the enhancer cup 40, the position and size of the fragile portion 42a and the non-fragile portions 42b1 and 42b2, and the top wall portion 41 and the closure shell of the enhancer cup 40.
  • the gas generating agent 51 can be prevented from rapidly burning and the progress of the combustion can be intentionally delayed. It is very easy to optimize the adjustment of the gas output according to the specification, such as sustaining over a period of time.
  • the end portion near the top wall portion 41 of the enhancer cup 40 including the non-fragile portion 42b2 by the fragile portion 42a bursting or melting when the transfer charge 34 is ignited becomes a non-fragile portion. 42b1 is detached and moved toward the top plate portion 21 side of the housing. Therefore, there is a delay in gas output that occurs when using the enhancer holder as disclosed in the above-mentioned JP-A-2002-370607. It does not occur.
  • the side wall 42 of the enhancer cup 40 is continuously provided along the circumferential direction when the transfer charge 34 is ignited. Since the gap is formed, the flame energy of the charge transfer agent 34 is transmitted to the gas generating agent 51 through the annular gap. Therefore, it is possible to secure a sufficiently large flame energy transmission area, and to effectively suppress variations in gas output.
  • the gas generator 1D in the present embodiment it is possible to suitably control the transmission of the flame energy by the charge transfer agent, and the light output characteristics that can be manufactured inexpensively and easily. It is possible to provide a gas generator in which no variation occurs.
  • FIG. 9 is a schematic cross-sectional view showing a gas generator according to a modification of the present embodiment
  • FIG. 10 shows the behavior of the cup-shaped member during operation of the gas generator according to the modification of the present embodiment. It is a schematic cross section shown.
  • the position where the fragile portion 42a is provided is closer to the substantially central portion in the axial direction of the enhancer cup 40 than the gas generator 1D in the present embodiment described above. While arrange
  • the position where the gap is formed becomes a position closer to the igniter 30, the size of the gap becomes larger, and the spread of the gas generating agent 51 becomes larger.
  • the gas generator 1E according to the present modification, the output characteristics of gas different from those of the gas generator 1D in the present embodiment described above are shown.
  • the spread of the gas generating agent 51 is schematically represented by broken-line arrows in FIG.
  • the present invention it is possible to control the transmission of energy by the transfer charge by appropriately changing the position of the weakened portion provided in the enhancer cup and the size in the axial direction, and a desired It can be set as the gas generator from which a gas output is obtained.
  • FIGS. 11 and 12 show the gas generators according to Examples 3 and 4 and Comparative Example 2, respectively, and adjust the combustion characteristics of the gas generant by applying the present invention by operating them. It is a graph which shows the result of the test which verified whether it became possible.
  • the graph shown in FIG. 11 shows the tank internal pressure [kPa] on the vertical axis and the time [ms] on the horizontal axis
  • the graph shown in FIG. 12 shows the working gas from the gas outlet on the vertical axis.
  • the ejection amount [mol / s] is obtained by taking time [ms] on the horizontal axis.
  • FIG. 13 is a schematic cross-sectional view showing the structure of the gas generator according to Comparative Example 2.
  • the gas generator which concerns on the comparative example 2 differs in the specification in part in the gas generator which concerns on the comparative example 1 in the verification test 1 mentioned above, Therefore, the gas output is also different.
  • a gas generator according to Examples 3 and 4 based on the present invention and a gas generator according to Comparative Example 2 not based on the present invention are prepared, and these are hermetically sealed to a predetermined capacity.
  • the output performance of each gas generator was evaluated by installing each in a tank and operating each of them and measuring the pressure in the tank over time. At that time, the amount of the working gas ejected was calculated based on the gas state equation from the change in the tank pressure.
  • the capacity of the tank used was 60 liters, and the ambient temperature was a room temperature environment (about 23 ° C.).
  • the same amount of the same type of transfer agent and gas generating agent was used, and all the structures other than the shape of the enhancer cup were made common.
  • a gas generator 1Y having a structure shown in FIG. 13 was used as a gas generator according to Comparative Example 2. That is, in the gas generator 1Y according to the comparative example 2, the enhancer cup 40 is configured such that the side wall portion 42 is a weak portion (that is, non-fragile that does not rupture or melt even when the explosive 34 is burned). Used). In the gas generator 1Y according to the comparative example 2, since all the portions of the side wall portion 42 are configured to be fragile, the spreading of the gas generating agent 51 is caused by the upper end portion, the substantially central portion, and the lower end portion of the fire transfer chamber 44. It progresses radially around all of the above. Note that the spread of the gas generating agent 51 is schematically represented by broken-line arrows in FIG.
  • the enhancer cup 40 made of aluminum is used in the structure shown in FIG. 7 described above, the thickness t22 of the fragile portion 42a is 0.3 mm, and the thicknesses of the non-fragile portions 42b1 and 42b2 are used. Both t23 and t24 were 1.0 mm.
  • the position where the fragile portion 42a is provided is a position where the height h2 shown in FIG. 7 is 6.0 mm, and the size of the fragile portion 42a in the axial direction is 2.2 mm as shown in FIG. It became the size.
  • the full length along the axial direction of the enhancer cup 40 was 21.5 mm, and the inner diameter was 14.0 mm.
  • the thickness t21 of the top wall part 41 was 1.2 mm, and the thickness of the flange part 43 was 1.0 mm.
  • the enhancer cup 40 made of aluminum is used in the structure shown in FIG. 7 described above, the thickness t22 of the fragile portion 42a is set to 0.3 mm, and the thicknesses of the non-fragile portions 42b1 and 42b2 are used. Both t23 and t24 were 1.0 mm.
  • the position where the fragile portion 42a is provided is a position where the height h2 shown in FIG. 7 is 9.0 mm, and the size in the axial direction of the fragile portion 42a is 2.2 mm as shown in FIG. It became the size.
  • the full length along the axial direction of the enhancer cup 40 was 21.5 mm, and the inner diameter was 14.0 mm.
  • the thickness t21 of the top wall part 41 was 1.2 mm, and the thickness of the flange part 43 was 1.0 mm.
  • the enhancer cup 40 made of aluminum was used in the structure shown in FIG. 13 described above, and the thickness t25 of the side wall portion 42 was set to 0.15 mm. In addition, the full length along the axial direction of the enhancer cup 40 was 21.5 mm, and the inner diameter was 14.0 mm.
  • the top wall 41 has a thickness t21 of 0.15 mm, and the flange 43 has a thickness of 0.18 mm.
  • Example 3 and Example 4 it can be seen that the pressure rise is not as steep as in Comparative Example 2, and a gentle pressure rise occurs. That is, as shown in FIG. 12, in Example 3 and Example 4, compared with Comparative Example 2, a relatively high gas ejection amount is obtained even after the time when the working gas ejection amount per unit time becomes maximum. It can be seen that it can be obtained over a period of time.
  • FIGS. 11 and 12 it can be seen that the degree of pressure rise can be easily controlled by adjusting the position where the weakened portion 42 a is provided.
  • Embodiments 1 to 3 of the present invention described above and modifications thereof the case where the present invention is applied to a so-called disk-type gas generator has been described as an example. It is not limited to.
  • 1A to 1E gas generator 10 initiator shell, 11 bottom plate portion, 12 peripheral wall portion, 13 holding portion, 14a, 14b caulking portion, 20 closure shell, 21 top plate portion, 22 peripheral wall portion, 23 gas outlet, 24 seal member , 30 igniter, 31 ignition part, 32 terminal pin, 33 sealing member, 34 transfer agent, 40 enhancer cup, 41 top wall part, 42 side wall part, 42a weak part, 42b, 42b1, 42b2, non-fragile part, 43 flange part , 44 Fire transfer chamber, 50 Combustion chamber, 51 Gas generating agent, 52 Closure shell side holding member, 53 Cushion material, 54 Initiator shell side holding member, 55 Filter.

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

Abstract

Le générateur de gaz (1A) de l'invention est équipé : d'un logement cylindrique court dont les deux extrémités constituées d'une coque d'initiateur (10) et d'une coque de fermeture (20), sont fermées; d'un allumeur (30) installé sur la coque d'initiateur (10); et d'un godet d'amplification (40) constitué d'un élément unique en forme de cylindre avec un fond qui accueille une matière de mise à feu (34) s'enflammant à l'aide de l'allumeur (30). Le godet d'amplification (40) possède sur des parties paroie latérales (42) : une partie de faible résistance (42a) mince qui éclate ou fond sous l'effet de la combustion de la matière de mise à feu (34) provoquée par l'actionnement de l'allumeur (30); et une partie de résistance (42b) épaisse qui demeure sans éclater ni fondre sous l'effet de la combustion de la matière de mise à feu (34) provoquée par l'actionnement de l'allumeur (30).
PCT/JP2011/060877 2010-05-13 2011-05-11 Générateur de gaz Ceased WO2011142395A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2010110980A JP2011235837A (ja) 2010-05-13 2010-05-13 ガス発生器
JP2010-110980 2010-05-13
JP2010-183744 2010-08-19
JP2010183744A JP2012040943A (ja) 2010-08-19 2010-08-19 ガス発生器

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WO2011142395A1 true WO2011142395A1 (fr) 2011-11-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240132011A1 (en) * 2021-01-22 2024-04-25 Nippon Kayaku Kabushiki Kaisha Gas generator
DE112018003685B4 (de) * 2017-07-20 2025-10-23 Daicel Corporation Gasgenerator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004217059A (ja) * 2003-01-15 2004-08-05 Daicel Chem Ind Ltd ガス発生器
JP2007015675A (ja) * 2005-06-08 2007-01-25 Daicel Chem Ind Ltd エアバッグ用ガス発生器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004217059A (ja) * 2003-01-15 2004-08-05 Daicel Chem Ind Ltd ガス発生器
JP2007015675A (ja) * 2005-06-08 2007-01-25 Daicel Chem Ind Ltd エアバッグ用ガス発生器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112018003685B4 (de) * 2017-07-20 2025-10-23 Daicel Corporation Gasgenerator
US20240132011A1 (en) * 2021-01-22 2024-04-25 Nippon Kayaku Kabushiki Kaisha Gas generator
EP4282520A4 (fr) * 2021-01-22 2024-12-11 Nippon Kayaku Kabushiki Kaisha Générateur de gaz
US12365305B2 (en) * 2021-01-22 2025-07-22 Nippon Kayaku Kabushiki Kaisha Gas generator

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