JP2015009598A - Gas generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas generator of a simple configuration which can be manufactured inexpensively without increasing the number of components.SOLUTION: A cylinder system gas generator includes: a housing; a holder; a closing member; a partition member; and a cup-shaped member. A combustion chamber and a filter chamber are defined by the housing, the holder, the closing member, and the partition member. A gas generating agent is disposed in the combustion chamber, whereas a filter is disposed in the filter chamber. The cup-shaped member is disposed covering both the combustion chamber and the filer chamber. The cup-shaped member is extended from a portion defining the combustion chamber, and further is interposed between the housing and the holder to fix both of them by caulking, and thereby sealing a gap between them in order to secure airtightness of the gas generator.

Description

  The present invention relates to a gas generator incorporated in an airbag device as an occupant protection device mounted on an automobile or the like, and more particularly to a so-called cylinder type gas generator having a long cylindrical outer shape.

  2. Description of the Related Art Conventionally, airbag devices, which are occupant protection devices, have been widely used from the viewpoint of protecting occupants such as automobiles. An airbag device is installed in a vehicle or the like for the purpose of protecting an occupant from an impact caused by a vehicle or the like, and is an airbag that is deployed by instantly inflating and deploying the airbag at the time of a vehicle or the like collision. It is intended to catch the passenger's body. The gas generator is a device that is incorporated in the airbag device and inflates and deploys the airbag by instantaneously generating gas when a vehicle or the like collides.

  Gas generators of various configurations exist based on specifications such as installation positions and outputs with respect to vehicles and the like. One of them is a gas generator having a structure called “cylinder type”. The cylinder type gas generator has a long cylindrical shape, and is suitably incorporated in a side airbag device, a passenger seat airbag device, a curtain airbag device, a knee airbag device, or the like.

  As documents disclosing the specific structure of the cylinder type gas generator described above, there are, for example, Japanese Patent Application Laid-Open No. 2005-313812 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2010-159051 (Patent Document 2). In the cylinder type gas generators disclosed in Patent Documents 1 and 2, an igniter and a charge transfer agent are disposed at one end of the long cylindrical housing in the axial direction, and the gas is generated at a substantially central portion in the axial direction. A working gas generation chamber is provided in which a working gas is generated by burning the gas generating agent and the gas generating agent is combusted, and a filter chamber in which the filter is housed and a gas outlet are provided at the other end in the axial direction. Yes.

  In the cylinder type gas generator having the above configuration, the flame generated by the operation of the igniter is transmitted to the gas generating agent through the combustion of the charge transfer agent, whereby the gas generating agent burns and the high-temperature and high-pressure working gas is burned. Is generated in the working gas generation chamber, and the generated working gas flows into the filter chamber from the working gas generation chamber along the axial direction of the housing, passes through the filter, and is ejected from the gas outlet to the outside of the housing. The The working gas ejected from the gas ejection port is then used for inflation and deployment of the airbag.

  Among these, Patent Document 2 discloses a gas generator in which a gas generating agent is sealed in a first sealed container and a transfer charge is sealed in a second sealed container. In the gas generator in which the first sealed container and the second sealed container are arranged, it is possible to eliminate the influence on the sealed gas generating agent and the transfer agent and to increase the surface area of the gas generating agent. By increasing the amount of combustion gas produced per unit time, the required amount of gas can be obtained at the beginning of operation.

JP 2005-313812 A JP 2010-159051 A

  In the gas generator disclosed in Patent Document 2 described above, it is necessary not only to seal a plurality of sealed containers but also to seal a holder and a housing including an igniter, which increases the number of parts and the number of assembly steps. There are concerns.

  Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide a gas generator having a simple configuration that can be manufactured at low cost without increasing the number of parts.

  The gas generator according to the present invention includes a housing, a holder, an igniter, a charge transfer chamber, and a cup-shaped member. The housing is formed of a long cylindrical metal member including a combustion chamber in which a gas generating agent is accommodated. The holder is attached to the housing in a state of being inserted into an opening end in the axial direction of the housing so as to face the combustion chamber, and has a hollow opening extending in a direction parallel to the axial direction of the housing. It consists of a metallic member. The igniter includes an igniter in which an igniting agent is accommodated, and the igniter is disposed in the hollow opening with the igniter positioned on the combustion chamber side and is fixed to the holder. The charge transfer chamber contains the transfer charge in a state facing the ignition part. In the cup-shaped member, the combustion chamber and the charge transfer chamber are arranged inside such that the gas generating agent accommodated in the combustion chamber faces the transfer charge transfer chamber. The cup-shaped member includes a seal portion that extends from a portion that defines the combustion chamber and that is interposed between the housing and the holder and seals a gap therebetween.

  In the gas generator according to the present invention, the cup-shaped member has the combustion chamber containing a gas generating agent and a filter chamber containing a filter inside the cup-shaped member, and the cup-shaped member. It is preferable that it has a partition part which divides the space inside the said housing into the gas generating agent accommodation chamber and the said filter chamber in the axial direction.

  In the gas generator according to the present invention, the peripheral wall portion of the housing has a gas outlet, and a part of the cup-shaped member defining the filter chamber faces the gas outlet. Is preferred.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the gas generator which can be manufactured at low cost which increases a number of parts, and can ensure airtightness between a housing and a holder easily.

It is the schematic of the gas generator in embodiment of this invention. It is an expanded sectional view of the area | region I shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below exemplifies a case where the present invention is applied to a so-called cylinder type gas generator suitably incorporated in a side airbag device or the like.

  FIG. 1 is a schematic cross-sectional view showing the internal structure of a cylinder type gas generator in an embodiment of the present invention. Below, with reference to these FIG. 1, the internal structure of the cylinder type gas generator in this Embodiment is demonstrated.

As shown in FIG. 1, the cylinder type gas generator 1 </ b> A in the present embodiment has a long and substantially cylindrical outer shape, and includes a housing 10, a closing member 12, and a holder 20. The housing 10 is formed of a long cylindrical member having openings at both ends in the axial direction. The closing member 12 is made of a disk-shaped member having a predetermined thickness, and has an annular groove portion 13 for fixing by caulking, which will be described later, on the peripheral surface thereof. The annular groove 13 for caulking and fixing is formed on the peripheral surface of the closing member 12 so as to extend in the circumferential direction.
The holder 20 is formed of a cylindrical member having a hollow opening 21 extending in the same direction as the axial direction of the housing 10, and has an annular groove 23 for caulking and fixing described later at a predetermined position on the outer peripheral surface thereof. The annular groove 23 for fixing by caulking is formed on the outer peripheral surface of the holder 20 so as to extend in the circumferential direction.

  The closing member 12 is attached to the housing 10 so as to close one open end of the housing 10. On the other hand, the holder 20 is attached to the other open end of the housing 10. A partition member 14 made of a substantially cylindrical member is disposed at a predetermined position in the axial direction of the housing 10. The partition member 14 is formed of a cylindrical member having a hollow opening 15 extending in the same direction as the axial direction of the housing 10, and has an annular groove 16 for caulking and fixing described later at a predetermined position on the outer peripheral surface thereof. . The annular groove 16 for caulking and fixing is formed on the outer peripheral surface of the partition member 14 so as to extend in the circumferential direction. The partition member 14 divides the space inside the housing 10 into a combustion chamber 17 and a filter chamber 18 in the axial direction.

  The housing 10, the closing member 12, the partition member 14, and the holder 20 are all made of a metal member such as stainless steel, steel, an aluminum alloy, or a stainless alloy. The housing 10, the closing member 12, the partition member 14 and the holder 20 are connected and fixed by caulking. Specifically, a part of the peripheral wall of the housing 10 corresponding to the annular groove portion 13 provided on the peripheral surface of the closing member 12 in a state in which a part of the closing member 12 is inserted into one opening end of the housing 10. The closure member 12 is caulked and fixed to the housing 10 by reducing the diameter inward in the radial direction (caulking) and engaging with the annular groove 13. One end of the holder 20 is fixed to the other opening end of the housing 10. In a state where the portion is inserted, the peripheral wall of the housing 10 corresponding to the annular groove 23 provided on the outer peripheral surface of the holder 20 is reduced in diameter in the radial direction (caulked) and engaged with the annular groove 23. By doing so, the holder 20 is caulked and fixed to the housing 10. In addition, the partition member 14 inserted in a predetermined position of the housing 10 reduces the diameter of the peripheral wall of the housing 10 corresponding to the annular groove portion 16 provided on the outer peripheral surface of the partition member 14 inward in the radial direction. The partition member 14 is caulked and fixed to the housing 10 by being engaged with the annular groove portion 16.

  These caulking fixings are caulking fixings called eight-side caulking that uniformly reduce the diameter of the peripheral wall of the housing 10 toward the inside in the radial direction. By performing this caulking, the first to third caulking portions 10 </ b> A to 10 </ b> C are provided on the peripheral wall of the housing 10. Among these caulking portions, the first caulking portion 10 </ b> A is a caulking portion for fixing the closing member 12 to the housing 10, and the second caulking portion 10 </ b> B is a caulking portion for fixing the holder 20 to the housing 10. The third caulking portion 10 </ b> C is a caulking portion for fixing the partition member 14 to the housing 10.

  As shown in FIG. 1, a gas outlet 11 is provided on the peripheral wall near the end of the housing 10 on the side where the holder 20 is attached. The gas ejection ports 11 are holes for ejecting the gas generated inside the cylinder type gas generator 1 </ b> A to the outside, and a plurality of gas ejection ports 11 are provided along the circumferential direction and the axial direction of the housing 10.

As shown in FIG. 1, an igniter 30 as an ignition means and a transfer charge 36 are arranged at one end portion in the axial direction of the housing (that is, a portion near the holder 20). The igniter 30 and the transfer charge 36 as ignition means are for generating a flame for burning a granular gas generating agent 52 to be described later, and the transfer charge 36 is a transfer charge storage member 37.
Is housed in.

  The igniter 30 is inserted into the penetrating portion 21 of the holder 20 and fixed by caulking. More specifically, the holder 20 has a caulking portion 26 at an end portion facing the space inside the housing, and the igniter 30 is inserted into the through portion 21 and is fixed to the holder 20. The igniter 30 is clamped by the holder 20 and the igniter 30 is fixed to the holder 20 by caulking the caulking portion 26 in the state.

  More specifically, the igniter 30 includes a base frame through which the pair of terminal pins 32 are inserted and held, and a squib cup attached to the base frame, and the terminal pins 32 inserted into the squib cup. A resistor (bridge wire) is attached so as to connect the tips of the squib cups, and 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.

  When a collision is detected, a predetermined amount of current flows through the resistor via the terminal pin 32. When a predetermined amount of current flows through the resistor, Joule heat is generated in the resistor, and the ignition powder starts to burn upon receiving this heat. 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 2 milliseconds or less when a nichrome wire is used as the resistor.

  As shown in FIG. 1, a combustion chamber 17 and a filter chamber 18 are provided in a space inside the cylinder type gas generator 1 </ b> A defined by the housing 10, the closing member 12 and the holder 20. The filter chamber 18 is mainly defined by the housing 10, the holder 20, and the partition member 14, and is provided in a portion (a lower portion in the drawing) near one opening end of the housing 10. On the other hand, the combustion chamber 17 is mainly defined by the housing 10, the partition member 14, and the closing member 12, and is provided in a portion near the other opening end of the housing 10 (upper portion in the drawing).

  A cushion material 51 and a gas generating agent 52 are mainly arranged inside the combustion chamber 17. A filter 53 is disposed inside the filter chamber 18.

  The transfer charge accommodating member 37 has a bottomed cylindrical shape and is disposed so as to face the igniter 30. A transfer charge (enhancer) 36 is stored in the space inside the transfer charge storage member 37.

  The explosive charge 36 is ignited by a flame generated by the operation of the igniter 30 and burns to generate hot particles. The charge transfer agent 36 must be capable of reliably starting the combustion of the gas generating agent 52, and is generally a composition comprising a metal powder / oxidant represented by B / KNO3 or the like. Or a composition comprising B / 5-aminotetrazole / potassium nitrate / molybdenum trioxide is used. As the charge transfer agent 36, a powdery one, a one molded into a predetermined shape by a binder, or the like is used. Examples of the shape of the transfer charge molded 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 gas generating agent 52 is ignited by the heat particles generated by the combustion of the charge transfer agent 36 ignited by the igniter 30, and generates gas by burning. The gas generating agent 52 is generally formed as a molded body containing a fuel, an oxidant, and an additive. As the fuel, for example, a triazole derivative, a tetrazole derivative, a guanidine derivative, an azodicarbonamide derivative, a hydrazine derivative, or a combination thereof is used. Specifically, for example, nitroguanidine, guanidine nitrate, cyanoguanidine, 5-aminotetrazole and the like are preferably used. In addition, as the oxidizing agent, for example, nitrate containing a cation selected from alkali metals, alkaline earth metals, transition metals, and ammonia is used. As the nitrate, for example, sodium nitrate, potassium nitrate and the like are preferably used. In addition, examples of the additive include a binder, a slag forming agent, and a combustion adjusting agent. As 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.
As the slag forming agent, silicon nitride, silica, acid clay, etc. can be suitably used. Moreover, as 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 52 includes various shapes such as a granular shape, a pellet shape, a cylindrical shape, and a disk shape. In addition, a porous (for example, a single-hole cylindrical shape or a porous cylindrical shape) having a hole inside the molded body is also used. These shapes are preferably appropriately selected according to the specifications of the airbag apparatus in which the cylinder type gas generator 1A is incorporated. For example, the shape in which the gas generation rate changes with time when the gas generating agent 52 is burned. It is preferable to select an optimal shape according to the specification, such as selecting. In addition to the shape of the gas generating agent 52, it is preferable to appropriately select the size and filling amount of the molded body in consideration of the linear combustion rate, the pressure index, etc. of the gas generating agent 52.

  A filter 53 is accommodated in the filter chamber 18. The filter chamber 18 communicates with the outside through the gas outlet 11 provided on the peripheral wall of the housing 10 described above.

  The filter 53 is a cylindrical member having a hollow portion extending in the same direction as the axial direction of the housing 10. By using the filter 53 made of a cylindrical member in this way, the flow resistance of the working gas flowing through the filter chamber 18 during operation can be kept low, and an efficient gas flow can be realized. As the filter 53, for example, a wire made of a metal such as stainless steel or steel, a wire wound around a net, or a material compressed by pressing is used. Specifically, a knitted wire mesh, a plain weave wire mesh, an assembly of crimped metal wires, or the like is used. When the gas generated in the combustion chamber 17 passes through the filter 53, the filter 53 functions as a cooling unit that cools the gas by taking away the high-temperature heat of the gas, and the slag contained in the gas. It also functions as a removing means for removing the like.

  A female connector (not shown) is attached to the end of the cylinder type gas generator 1A where the holder 20 is disposed. This female connector is a part to which a male connector of a harness for transmitting a signal from a collision detection means provided separately from the cylinder type gas generator 1A is connected. A shorting clip (not shown) is attached to the female connector as necessary. The shorting clip is attached to prevent the cylinder type gas generator 1A from malfunctioning due to electrostatic discharge or the like during the transportation of the cylinder type gas generator 1A. In the stage, the male connector of the harness is inserted into the female connector, so that the contact with the terminal pin 32 is released.

  Next, the operation | movement at the time of the action | operation of the cylinder type gas generator 1A demonstrated above is demonstrated. When a vehicle equipped with an airbag device incorporating the cylinder-type gas generator 1A according to the present embodiment collides, the collision is detected by a collision detection means provided separately in the vehicle, and ignition is performed based on this. The device 30 is activated. When the igniter 30 is activated, the pressure in the igniter 31 increases due to combustion of the igniting agent, whereby the igniter 31 is ruptured and the flame flows out of the igniter 31. The explosive charge 36 accommodated in the explosive charge accommodating member 37 is ignited and burned by the flame generated by the operation of the igniter 30, and generates a large amount of heat particles. By the combustion of the charge transfer agent 36, the pressure in the transfer charge storage member 37 rises, whereby the transfer charge storage member 37 is ruptured, and the above-described heat particles reach the gas generating agent 52.

  Due to the flowing heat particles, the gas generating agent 52 is ignited and burned to generate a large amount of gas. Due to the combustion of the gas generating agent 52, the pressure in the combustion chamber 17 increases, and the gas generated thereby flows into the filter chamber 18. Then, the gas that has flowed in is cooled to a predetermined temperature via the filter 53. A large amount of the cooled gas raises the pressure in the cup-shaped member 40, bursts the cup-shaped member 40 near the gas jetting port 11, and passes from the gas jetting port 11 to the outside of the cylinder type gas generator 1 </ b> A. Is ejected. The gas ejected from the gas ejection port 11 is guided into the airbag to inflate and deploy the airbag.

  FIG. 2 is an enlarged cross-sectional view of region I shown in FIG. Next, with reference to FIGS. 1 and 2, the structure in the vicinity of the igniter 30 of the cylinder type gas generator 1A in the present embodiment will be described in more detail.

As shown in FIG. 1, in the cylinder type gas generator 1 </ b> A according to the present embodiment, the cup-shaped member 40 includes a bottomed cylindrical cup portion 41 that defines the combustion chamber 17 and the filter chamber 18, and the cup portion. It is comprised with the single member containing the seal | sticker part 42 further extended from 41 further.
Inside the bottomed cylindrical cup portion 41, the gas generating agent 52 accommodated in the combustion chamber 17 described above, the filter 53 accommodated in the filter chamber 18, and the partition member 14 are accommodated. The partition member 14 is arranged side by side in the axial direction so as to face the combustion chamber 17 and the filter chamber 18.

  As shown in FIG. 2, the seal portion extends from the cup portion 41, and is interposed between the inner peripheral surface 10 d of the housing 10 and a portion of the outer peripheral surface of the holder 20 near the end surface. And the holder 20 are filled. The seal portion 42 is formed in a cylindrical shape so as to surround the outer peripheral surface 22 of the holder 20, and fills the entire gap in the circumferential direction with a gap between the housing 10 and the holder 20.

  The cup-shaped member 40 is configured by a member made of a metal material. When the cup-shaped member 40 is formed of a metal material, for example, aluminum, copper, an aluminum alloy, a copper alloy, steel, or the like can be suitably used as the specific material, and in particular, an aluminum foil or a copper foil It is particularly preferred to use a member called

  An annular groove portion 23 provided on the outer peripheral surface 22 of the holder 20 by applying a force toward the holder 20 and the peripheral wall portion of the housing 10 in the direction of arrow A in the figure in the area to be caulked and fixed. So that the peripheral wall portion of the housing 10 is reduced in diameter (caulked) along the outer peripheral surface 22 of the holder 20 to be plastically deformed, and the caulking portion 10C is engaged with the annular groove portion 23. It is configured. As a result, the holder 20 is securely fixed to the housing 10. Here, all of the caulking portions 10C are in direct contact with the outer peripheral surface 22 of the holder 20, thereby ensuring the pressure resistance during operation (that is, preventing gas leakage).

In the area to be caulked and fixed, it is preferable to arrange an adhesive or a rubber elastic body on the inside or outside in the radial direction of the seal portion 42 because it becomes possible to ensure sealing performance when caulking.
Examples of adhesives preferably include a resin material having excellent heat resistance, durability, corrosion resistance, etc. after curing as a raw material, for example, a material containing a cyanoacrylate resin or a silicone resin as a raw material. Is particularly preferably used. In addition to the above resin materials, phenolic resins, epoxy resins, melamine resins, urea resins, polyester resins, alkyd resins, polyurethane resins, polyimide resins, polyethylene resins, polypropylene resins, Polyvinyl chloride resin, polystyrene resin, polyvinyl acetate resin, polytetrafluoroethylene resin, acrylonitrile butadiene styrene resin, acrylonitrile styrene resin, acrylic resin, polyamide resin, polyacetal resin, polycarbonate resin, Polyphenylene ether resin, polyphenylene sulfide resin, polysulfone resin, polyether sulfone resin, polyarylate resin, polyether ether ketone resin, polyamideimide resin, liquid crystal polymer Styrene rubber, those containing olefin rubbers such as is available as an adhesive as described above. By interposing the adhesive in this manner, the holder 20 and the housing 10 are more firmly bonded, so that an improvement in sealing performance can be expected.
As an example of rubber elastic body, an elastic body containing ethylene-propylene rubber (EPM), ethylene-propylene-butadiene rubber (EPDM), chloroprene rubber, propylene rubber, or ethylene rubber as a main component is used. it can. More preferably, the elastic body 70 is preferably composed of a foamed body mainly composed of these materials. In this case, the foamed body is configured such that bubbles contained therein are not in communication with each other. It may be a closed-cell porous body, or may be an open-cell porous body in which bubbles contained inside communicate with each other. By arranging the rubber elastic body in this way, it is compressed and deformed by caulking. As a result, an elastic force is generated from the rubber elastic body, so that the sealing property between the holder 20 and the housing 10 can be further increased.

  As described above, the sealing performance is ensured by distorting the seal portion 42 after assembly. Therefore, the thickness before assembly of the seal portion 42 is preferably adjusted to approximately 0.05 mm to 0.8 mm, although it varies somewhat depending on the specific material, and the amount of distortion after the assembly is as follows. The strain value is preferably set to 0.2% or more with respect to the initial state. When the thickness before assembling of the seal portion 42 and the thickness after assembling satisfy the above conditions, the sealing performance at the portion is stably maintained over a long period of time.

  By using the cylinder type gas generator 1A in the present embodiment described above, the housing 10 and the holder 20 are separated by the seal portion 42 which is a part of the cup-shaped member 40 in which the combustion chamber 17 and the filter chamber 18 are accommodated. The gap between the two is filled, and the sealing process at that portion is realized. Therefore, the combustion chamber 17 can be easily and airtightly sealed without increasing the number of parts, and it is possible to prevent the gas generating agent 52 from absorbing moisture due to outside air containing moisture entering the combustion chamber 17. It becomes. Therefore, a highly reliable cylinder type gas generator that can be manufactured easily and at low cost can be obtained.

  Thus, the above-described embodiment disclosed herein is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1A cylinder type gas generator, 10
Housing, 10A to 10C Caulking portion, 10d inner peripheral surface, 11 gas outlet, 12
Closing member, 13 annular groove, 14 partition member, 15 hollow opening, 16 annular groove, 17 combustion chamber, 18 filter chamber, 20 holder, 21
Hollow opening portion, 23 annular groove portion, 26 caulking portion, 30 igniter, 31 ignition portion, 32 terminal pin, 36 transfer charge, 37 transfer charge storage member, 40 cup-shaped member, 41
Cup part, 42 Seal part, 51 Cushion material, 52 Gas generating agent, 53 Filter, A Force direction

Claims (3)

A long cylindrical housing containing therein a combustion chamber containing a gas generating agent;
A metal holder including a hollow opening extending in a direction parallel to the axial direction of the housing so as to face the combustion chamber;
An igniter including an igniter in which an igniting agent is stored, the igniter being disposed on the combustion chamber side and disposed in the hollow opening and fixed to the holder;
The igniter includes a charge transfer chamber containing a transfer charge in a state facing the ignition unit,
A cup-shaped member in which the combustion chamber and the charge transfer chamber are arranged so that the gas generating agent accommodated in the combustion chamber faces the transfer charge chamber;
The said cup-shaped member is a gas generator which is extended from the part which prescribes | regulates the said combustion chamber, and is interposed between the said housing and the said holder, and contains the seal | sticker part which seals the clearance gap between these. The inside of the cup-shaped member has a filter chamber containing the combustion chamber containing a gas generating agent and a filter,
It is located inside the cup-shaped member, and has a partition portion that partitions the space inside the housing into the gas generating agent storage chamber and the filter chamber in the axial direction.
The gas generator according to claim 1. The gas according to any one of claims 1 to 2, wherein the peripheral wall portion of the housing has a gas jet port, and a part of a portion defining the filter chamber of the cup-shaped member faces the gas jet port. Generator.

Images