JP2010159051A - Gas generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder-type gas generator capable of obtaining a desired gas output in an instant in an early stage of its running. <P>SOLUTION: The gas generator 1A is provided with a housing 10, an igniter 30, a plurality of granular gas-generating agent 53, a plurality of granular primer 27 and a filter 60. The housing 10 includes a long tube-like cylinder member 11 installed with a gas-gushing port 12 on the peripheral wall, a holder 20 constituting one edge in the axis direction and a blocking member 14 constituting the other edge in the axis direction. The gas-generating agent 53 is disposed at a position close to the blocking member 14 within the interior space of the housing 10. The primer 27 is disposed at a position closer to the holder 20 than the position of the gas generator 53 disposed. The filter 60 is disposed at a position closer to the holder 20 than the position of the primer 27 disposed. The gas-generating agent 53 is sealed in a first air-tight container 70 inserted inside the housing 10, and the primer 27 is sealed in a second air-tight container 80 inserted inside the housing 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

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 specifically to a gas generator having a long, substantially 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 the collision of 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, an airbag device for a passenger seat, or the like. In addition, as a gas generator having a long cylindrical outer shape, there is a so-called T-shaped gas generator other than this cylinder type gas generator.

  In general, in a cylinder type gas generator, an igniter and a charge transfer agent are disposed at one end of the housing in the axial direction, and a gas generating agent storage chamber for storing the gas generating agent is provided at a substantially central portion in the axial direction. A filter chamber in which the filter is accommodated and a gas outlet are provided at the other end in the axial direction. In the cylinder-type gas generator having the above-described configuration, the flame generated by the operation of the igniter is transmitted to the gas generating agent through the combustion of the transfer agent, whereby the gas generating agent burns and the high-temperature and high-pressure combustion gas Will occur. The generated high-temperature and high-pressure combustion gas flows from the gas generating agent storage chamber into the filter chamber along the axial direction of the housing, passes through the filter, and is ejected from the gas ejection port to the outside of the housing. The combustion gas ejected from the gas ejection port is then used for inflation and deployment of the airbag.

  Documents disclosing the specific structure of the cylinder type gas generator having the above configuration include, for example, Japanese Patent Application Laid-Open No. 2005-313812 (Patent Document 1) and Japanese Patent Application Laid-Open No. 11-78766 (Patent Document 2). . In these Patent Documents 1 and 2, gas generation in which a plurality of granular gas generating agents are arranged in a space inside a housing by arranging a partition plate inside a long cylindrical housing whose both ends are closed. A cylinder type gas generator partitioned into an agent storage chamber and a filter chamber in which a filter is disposed is disclosed. In the cylinder-type gas generator, a filter having a hollow opening extending along the axial direction of the housing is used, and a gas outlet for ejecting combustion gas is provided on the peripheral wall of the housing defining the filter chamber. It has been.

  Further, as a cylinder type gas generator having a configuration different from the above-described configuration, there is one disclosed in Japanese Patent Laid-Open No. 2006-205893 (Patent Document 3). In the cylinder type gas generator disclosed in Patent Document 3, an igniter is disposed at one end and the other end in the axial direction of the housing, and is a cylindrical gas integrally formed at a substantially central portion in the axial direction. A generating agent molded body is disposed, and a cylindrical filter is disposed between the gas generating agent molded body and the above-described pair of igniters, and a gas is formed on the peripheral wall of the housing where the cylindrical filter is disposed. A spout is provided. The cylinder-type gas generator disclosed in Patent Document 3 is configured to start combustion of the gas generant from the axial end surface of the gas generant molded body by adopting the above configuration, and a pair of ignitions The desired gas output corresponding to the degree of vehicle collision can be obtained by selecting whether the gas generators are operated simultaneously, at different times, or only one of the pair of igniters. It is configured as follows.

JP 2005-313812 A Japanese Patent Laid-Open No. 11-78766 JP 2006-205893 A

  In general, in a gas generator, it is important to obtain a desired gas output instantaneously immediately after a collision. The cylinder-type gas generator is no exception, and it is necessary that the combustion gas be immediately ejected to the outside of the housing via the filter without staying inside the housing. In particular, in the initial stage of operation, a large amount of combustion gas needs to be introduced into the airbag in order to inflate and deploy the airbag, but when the combustion gas stays in the housing in the initial stage of operation, The initial performance of the airbag device will be impaired.

  Here, in the case of the cylinder type gas generator configured as disclosed in Patent Documents 1 and 2, the end portion on the igniter side of the gas generating agent storage chamber in which a plurality of granular gas generating agents are stored. In this case, the gas generating agent starts to burn, and the generated combustion gas reaches the filter chamber via the region filled with the unburned gas generating agent. For this reason, not only the distance between the position where the combustion gas is physically generated in the initial stage of operation and the filter chamber is increased, but also the unburned gas generating agent inhibits the flow of the combustion gas. Therefore, the combustion gas stays in the housing at the initial stage of operation, and it may be difficult to obtain a desired gas output.

  On the other hand, in the case of the cylinder type gas generator configured as disclosed in Patent Document 3, a filter chamber is provided adjacent to an end portion on the igniter side of the integrally formed gas generant molded body. Therefore, the combustion gas generated by the combustion of the gas generant molded body immediately flows into the filter chamber and is ejected to the outside of the housing through the filter. Accordingly, the combustion gas does not stay in the housing in the initial stage of operation, and the combustion gas is immediately ejected from the gas ejection port.

  However, when the configuration as disclosed in Patent Document 3 is adopted, a cylindrical gas generant molded body molded integrally is loaded inside the housing, so that Patent Documents 1 and 2 are used. As shown in FIG. 4, the surface area is significantly smaller than when a plurality of granular gas generating agents are filled in the housing. As a result, the amount of combustion gas generated per unit time during combustion is greatly reduced as compared with the case disclosed in Patent Documents 1 and 2, which is desired at the initial stage of operation. There is a risk that it may be difficult to obtain the gas output of the above.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cylinder type gas generator that can instantaneously obtain a desired gas output in the initial stage of operation.

  The gas generator according to the present invention includes a housing, an igniter, a plurality of granular gas generating agents, and a filter. The housing is made of a long cylindrical member whose one end and the other end in the axial direction are closed. The igniter is attached to the one end of the housing so as to face a space inside the housing. The plurality of granular gas generating agents are arranged in positions close to the other end of the housing in the space inside the housing. The filter is disposed at a position closer to the one end of the housing than a position where the gas generating agent is disposed in a space inside the housing. Here, the filter comprises a cylindrical member having a hollow opening extending along the axial direction of the housing, and the housing has a gas outlet on the peripheral wall of the portion where the filter is disposed. . The gas generating agent is enclosed in a first sealed container inserted into the housing, and the transfer charge is enclosed in a second sealed container inserted into the housing.

  In the gas generator according to the present invention, the space inside the housing is closer to the one end of the housing than the position where the gas generating agent is arranged, and more than the position where the filter is arranged. Preferably, the housing further includes a plurality of granular transfer agents disposed at positions near the other end of the housing, and in this case, the transfer agent is inserted into the housing in a second seal. It is preferable to be enclosed in a container.

  In the gas generator according to the present invention, the filter has one axial end of the filter pressed against the one end of the housing, and the peripheral wall of the housing is caulked inward. Thus, the other axial end of the filter is preferably fixed to the housing by being sandwiched in the radial direction.

  In the gas generator based on the said invention, it is preferable that the said 1st airtight container and the said 2nd airtight container are arrange | positioned along with the axial direction of the said housing.

  In the gas generator according to the present invention, the second sealed container may be disposed inside the first sealed container.

  In the gas generator based on the said invention, it is preferable that the crushing prevention member for preventing crushing of the said gas generating agent by a vibration is accommodated in the said 1st airtight container.

  In the gas generator according to the present invention, the igniter includes an igniter in which an igniting agent that ignites during operation is accommodated, and a terminal pin connected to the igniting unit to ignite the igniting agent. The ignition part is preferably inserted in the hollow opening of the filter located near the one end of the housing.

  In the gas generator according to the present invention, the internal space of the housing is axially arranged in the medicine storage chamber in which the first closed container and the second closed container are stored and the filter chamber in which the filter is stored. It is preferable to further include a partition member that partitions and has a communication hole that communicates the drug storage chamber and the filter chamber.

  In the gas generator according to the present invention, the partition member covers the axial end surface of the filter on the drug storage chamber side in the axial direction, and the hollow of the filter from the inner peripheral edge of the annular plate portion. It is preferable to include a cylindrical portion that continuously extends into the opening and covers the inner peripheral surface of the filter near the end surface in the axial direction. In that case, the communication hole is defined by the inner peripheral surface of the cylindrical portion. Here, it is preferable that the opening area of the communication hole changes as the distance from the annular plate portion increases.

  In the gas generator according to the present invention, the cylindrical portion is gradually reduced or enlarged so that the opening area of the communication hole decreases or increases as the distance from the annular plate portion increases. Is preferred.

  In the gas generator according to the present invention, it is preferable that the partition member is fitted or loosely fitted to the housing.

  In the gas generator according to the present invention, the filter is a metal wire wound in a cylindrical shape so as to include a void inside, or the metal wire is cylindrical so as to include a void inside. It is preferable that it is pressed into a shape.

  In the gas generator according to the present invention, when the partition member and the filter are projected on a plane perpendicular to the axial direction along the axial direction of the housing, the inner edge of the projection region of the filter is The partition member is preferably not located on the inner side of the inner edge of the projection area.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the cylinder type gas generator which can obtain a desired gas output instantaneously at the operation | movement initial stage.

It is the front view and right view which show the external appearance structure of the cylinder type gas generator in Embodiment 1 of this invention. It is a schematic cross section which shows the internal structure of the cylinder type gas generator in Embodiment 1 of this invention. It is a schematic cross section which shows the internal structure of the cylinder type gas generator which concerns on the 1st modification in Embodiment 1 of this invention. It is a schematic cross section which shows the internal structure of the cylinder type gas generator which concerns on the 2nd modification in Embodiment 1 of this invention. It is a schematic cross section which shows the internal structure of the cylinder type gas generator in Embodiment 2 of this invention. It is a schematic cross section which shows the internal structure of the cylinder type gas generator in Embodiment 3 of this invention. It is a principal part expanded sectional view of the cylinder type gas generator in Embodiment 3 of this invention. It is a principal part expanded sectional view of the cylinder type gas generator in Embodiment 4 of this invention. It is a schematic cross section which shows the internal structure of the cylinder type gas generator in Embodiment 5 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiment described below, 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 will be described as an example.

(Embodiment 1)
1A and 1B are views showing an external structure of a cylinder type gas generator according to an embodiment of the present invention. FIG. 1A is a front view and FIG. 1B is a right side view. Moreover, FIG. 2 is a figure which shows the internal structure of the cylinder type gas generator in embodiment of this invention, and is schematic sectional drawing along the II-II line shown to FIG. 1 (A) and FIG. 1 (B) It is. First, with reference to these FIG. 1 (A), FIG. 1 (B), and FIG. 2, the external structure and internal structure of the cylinder type gas generator 1A in this Embodiment are demonstrated.

  As shown in FIG. 1 (A), FIG. 1 (B), and FIG. 2, the cylinder type gas generator 1A in the present embodiment has a long and substantially cylindrical outer shape, and serves as an outer shell member. A housing 10 is provided. The housing 10 includes a cylindrical member 11, a closing member 14 and a holder 20. The cylindrical member 11 is a long cylindrical member having openings at both ends in the axial direction. The closing member 14 is made of a disk-like member having a predetermined thickness, and constitutes one end portion of the housing 10 in the axial direction by closing one axial opening of the cylindrical member 11. The closing member 14 has a groove 14a for caulking and fixing, which will be described later, on the circumferential surface thereof, and the groove 14a is formed in an annular shape so as to extend along the circumferential direction on the circumferential surface of the closing member 14. . The holder 20 is formed of a cylindrical member having a hollow portion 22 that extends along the same direction as the axial direction of the cylindrical member 11, and closes the other opening in the axial direction of the cylindrical member 11, thereby It constitutes the other end of the direction. The holder 20 has a later-described caulking fixing groove 21 at a predetermined position on the outer peripheral surface thereof. The groove 21 is formed in an annular shape on the outer peripheral surface of the holder 20 so as to extend in the circumferential direction. Yes.

  The cylindrical member 11, the closing member 14, and the holder 20 are all made of a metal member such as stainless steel, steel, aluminum alloy, stainless alloy, and are connected and fixed by caulking. Specifically, in a state where a part of the closing member 14 is inserted into one opening end of the cylindrical member 11, a portion of the cylindrical member 11 corresponding to the groove 14 a provided on the peripheral surface of the closing member 14. The closure member 14 is caulked and fixed to the cylindrical member 11 by reducing the diameter of the peripheral wall inward in the radial direction and engaging with the groove 14a. In a state where the portion is inserted, the peripheral wall of the cylindrical member 11 corresponding to the groove 21 provided on the outer peripheral surface of the holder 20 is contracted radially inward and engaged with the groove 21. The holder 20 is caulked and fixed to the cylindrical member 11.

  These caulking fixings are caulking fixings called eight-side caulking that uniformly reduce the diameter of the peripheral wall of the cylindrical member 11 radially inward. By performing this caulking, the caulking portions 13 a and 13 b are provided on the peripheral wall of the cylindrical member 11. By using the above-mentioned eight-side caulking, it is possible to ensure a considerable degree of airtightness without interposing a sealing member in particular between the two members to be caulked and fixed.

  As shown in FIG. 2, the space inside the cylindrical gas generator 1 </ b> A defined by the cylindrical member 11, the closing member 14, and the holder 20 mainly includes an igniter 30, a charge transfer agent 27, a gas generating agent 53, and A filter 60 is accommodated. Hereinafter, each of the internal components including these will be described in detail.

  An igniter (squib) 30 is disposed in the hollow portion 22 of the holder 20 constituting one end portion of the housing 10 in the axial direction. The igniter 30 is an ignition device for generating a flame, and includes an ignition unit 31 and a terminal pin 32. The ignition unit 31 is disposed so as to face the space inside the housing 10 and is inserted into the hollow opening 61 of the filter 60 described later from the side where the holder 20 is located. The ignition unit 31 includes 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.

  More specifically, the igniter 30 includes a base portion through which the pair of terminal pins 32 are inserted and held, and a squib cup attached to the base portion, and the tip of the terminal pin 32 inserted into the squib cup. A resistor (bridge wire) is attached so as to connect 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 3 milliseconds or less when a nichrome wire is used as the resistor.

  Between the holder 20 and the igniter 30, the resin molding part 24 is located. The resin molding part 24 is a part for fixing the igniter 30 to the holder 20, and is fixed to the surface of the holder 20 and the surface of the igniter 30 to hermetically seal the gap between them. . The resin molding portion 24 is formed by, for example, insert molding, and as a raw material, a thermosetting resin typified by an epoxy resin or the like, a polybutylene terephthalate resin, a polyethylene terephthalate resin, a polyamide resin (for example, nylon 6, nylon 66, etc.) ), Thermoplastic resins represented by polypropylene sulfide resin, polypropylene oxide resin and the like can be used.

  A filter 60 is disposed in a region adjacent to the holder 20 in the space inside the housing 10. The filter 60 is formed of a cylindrical member having a hollow opening 61 extending in the same direction as the axial direction of the housing 10, and one axial end thereof is pressed against the holder 20 to be in contact with the other shaft. A direction end is sandwiched in the radial direction by a caulking portion 13 c provided on the cylindrical member 11. The caulking portion 13c provided in the cylindrical member 11 is formed by the above-described eight-side caulking, and more specifically, a predetermined position of the peripheral wall of the cylindrical member 11 is set in a state where the filter 60 is inserted into the cylindrical member 11. It is formed by reducing the diameter toward the inside in the radial direction.

  As described above, the ignition portion 31 of the igniter 30 is inserted into the hollow opening 61 located on the one axial end side of the filter 60. Further, the outer peripheral surface of the filter 60 is in contact with the inner peripheral surface of the cylindrical member 11. If the filter 60 made of such a cylindrical member is used, the flow resistance of the combustion gas flowing in the region where the filter 60 is arranged can be kept low during operation, and efficient combustion gas flow can be realized. It becomes.

  As the filter 60, for example, a metal wire material such as stainless steel or steel, or a mesh material in which a metal wire material is knitted is wound or pressed by pressing or the like. Specifically, a knitted wire mesh, a plain weave wire mesh, an assembly of crimped metal wires or the like is used as the mesh material. Thus, the filter 60 formed by winding or compacting the metal wire rod in a cylindrical shape includes voids therein, and enables the above-described combustion gas flow. When the generated combustion gas passes through the filter 60, the filter 60 functions as a cooling means that cools the combustion gas by taking away the high-temperature heat of the combustion gas, and a residue ( It also functions as a removing means for removing slag).

  A gas outlet 12 is provided on the peripheral wall of the cylindrical member 11 at a portion corresponding to the region where the filter 60 is disposed. The gas outlet 12 is a hole for discharging combustion gas generated inside the cylinder type gas generator 1 </ b> A to the outside, and a plurality of gas outlets 12 are provided along the circumferential direction and the axial direction of the cylindrical member 11. .

  A medicine storage chamber is formed in a region adjacent to the filter 60 on the side opposite to the side where the holder 20 is located in the space inside the housing 10. In this medicine storage chamber, in order from the side where the filter 60 is located, a second sealed container 80 in which a plurality of granular transfer agents 27 are sealed and a first sealed container 70 in which a plurality of granular gas generating agents 53 are sealed. The second sealed container 80 and the first sealed container 70 are both inserted into the cylindrical member 11.

  The second sealed container 80 includes a bottomed cylindrical cup portion 81 and a cap portion 82 that closes the opening of the cup portion 81, and the cup portion 81 and the cap portion 82 are combined and joined. Thus, the accommodation space 84 formed inside thereof is hermetically sealed from the outside of the second sealed container 80. As the cup part 81 and the cap part 82, a metal thin plate (foil) such as copper, aluminum, copper alloy, or aluminum alloy formed by press working or the like is used. In addition, brazing, bonding, or the like is preferably used for joining the cup portion 81 and the cap portion 82.

The storage space 84 of the second sealed container 80 is filled with a plurality of granular explosives 27 as described above. The explosive charge 27 is ignited by a flame generated by the operation of the igniter 30 and burns to generate hot particles. The charge transfer agent 27 needs to be able to reliably start the gas generating agent 53 described later, and generally, from a metal powder / oxidant represented by B / KNO ₃ or the like. The composition etc. which become are used. As the charge transfer agent 27, a powdery material, a material formed into a predetermined shape by a binder, or the like can be 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 first sealed container 70 includes a bottomed cylindrical cup portion 71 and a cap portion 72 that closes the opening of the cup portion 71, and the cup portion 71 and the cap portion 72 are combined and joined. Thus, the accommodation space 74 formed inside is hermetically sealed from the outside of the first sealed container 70. As the cup part 71 and the cap part 72, a metal thin plate (foil) such as copper, aluminum, copper alloy, aluminum alloy or the like formed by press working or the like is used. In addition, brazing, bonding, or the like is suitably used for joining the cup portion 71 and the cap portion 72.

  In addition to the plurality of granular gas generating agents 53 described above, the cushion material 52 is accommodated in the accommodation space 74 of the first sealed container 70. More specifically, the cushion material 52 is disposed in the end portion on the side where the closing member 14 is located in the accommodation space 74 of the first sealed container 70, and the remaining accommodation space 74 of the first sealed container 70 is defined. A plurality of granular gas generating agents 53 are accommodated so as to be filled.

  The gas generating agent 53 is ignited by the heat particles generated by the combustion of the charge transfer agent 27 ignited by the igniter 30, and generates gas by burning. The gas generating agent 53 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 53 formed into a granular shape includes various shapes such as a granular shape, a pellet shape, a cylindrical shape, and a disk shape. Also, a porous (for example, a single-hole cylindrical shape or a porous cylindrical shape) having a hole inside the molded body can be used. These shapes are preferably selected as appropriate 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 53 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 53, 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, and the like of the gas generating agent 53.

  The cushion material 52 corresponds to a crushing prevention member for preventing the gas generating agent 53 made of a molded body from being crushed by vibration or the like, and a ceramic fiber molded body, foamed silicon, or the like is preferably used.

  In the space inside the housing 10, a cushion material 51 is disposed in a region adjacent to the medicine storage chamber on the side opposite to the side where the filter 60 is located. The cushion material 51 is a member for fixing the above-described various internal components in the axial direction inside the housing 10, and is also a member for absorbing variations in the axial length of the internal components described above. . The cushion material 51 is sandwiched between the closing member 14 constituting the other end portion of the housing 10 in the axial direction and the first sealed container 70. As the cushion material 51, for example, a ceramic fiber molded body, foamed silicon, or the like can be used.

  A female connector (not shown) is attached to the end of the cylinder type gas generator 1A on the side where the holder 20 is disposed. This female connector is a part to which a male connector of a harness that transmits a signal from a collision detection sensor 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.

  The characteristic configuration of the cylinder type gas generator 1A in the present embodiment described above is summarized as follows. The cylinder type gas generator 1A in the present embodiment mainly includes a housing 10, an igniter 30, a plurality of granular gas generating agents 53, a plurality of granular explosives 27, and a filter 60. The housing 10 includes a long cylindrical cylindrical member 11, a holder 20 constituting one end portion in the axial direction, and a closing member 14 constituting the other end portion in the axial direction. The igniter 30 is attached to the holder 20 so that the ignition part 31 faces the space inside the housing 10. The plurality of granular gas generating agents 53 are arranged at positions close to the closing member 14 in the space inside the housing 10. The plurality of granular explosives 27 are arranged in a position closer to the holder 20 than the position where the gas generating agent 53 is arranged in the space inside the housing 10. The filter 60 is disposed in a position closer to the holder 20 than the position where the charge transfer agent 27 is disposed in the space inside the housing 10. Here, the filter 60 is formed of a cylindrical member having a hollow opening 61 extending along the axial direction of the housing 10, and the housing 10 has the gas outlet 12 on the peripheral wall of the portion where the filter 60 is disposed. ing. The gas generating agent 53 is sealed in a first sealed container 70 inserted into the housing 10, and the transfer charge 27 is sealed in a second sealed container 80 inserted into the housing 10.

  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 flame blown out from the ignition unit 31 reaches the second sealed container 80 via the hollow opening 61 of the filter 60 and melts or ruptures it. As a result, the explosive charge 27 accommodated in the second sealed container 80 is ignited and burned by the flame generated by the operation of the igniter 30 and generates a large amount of heat particles.

  The large amount of generated heat particles reaches the first sealed container 70 and melts or ruptures it. Thereby, the gas generating agent 53 is ignited and burned, and a large amount of combustion gas is generated. The generated combustion gas flows in the hollow opening 61 of the filter 60 along the axial direction of the housing 10, and then enters the filter 60 while changing the flow direction, and reaches the predetermined temperature through the filter 60. And is ejected from the gas ejection port 12 to the outside of the cylinder type gas generator 1A. The combustion gas ejected from the gas ejection port 12 is guided into the airbag to inflate and deploy the airbag.

  By adopting a configuration like the cylinder type gas generator 1A in the present embodiment described above, the gas generating agent 53 is disposed from the end on the igniter 30 side in the region where the gas generating agent 53 is accommodated. Since the combustion can be started, not only the distance between the position where the combustion gas is generated and the filter 60 in the initial stage of operation can be reduced, but also the flow of the generated combustion gas is generated as an unburned gas. It is possible to prevent the combustion gas from being obstructed by the agent or the like, and the generated combustion gas is immediately allowed to flow into the region in which the filter 60 is accommodated, and then ejected from the gas outlet 12 to the outside of the housing 10 via the filter 60. Can be. In addition, by adopting a configuration such as the cylinder type gas generator 1A in the present embodiment, the inside of the housing 10 in a state where a plurality of granular gas generating agents 53 are sealed using the first sealed container 70. Therefore, the surface area of the gas generating agent 53 can be greatly increased, and the amount of combustion gas generated per unit time can be increased to obtain the required amount of combustion gas in the initial stage of operation. it can. Therefore, it can be set as the high performance cylinder type gas generator which can obtain a desired gas output instantaneously at the initial stage of operation, and it can contribute to improvement in the performance of the airbag apparatus.

  Further, as described above, in the cylinder type gas generator 1A in the present embodiment, since the gas generating agent 53 and the transfer agent 27 are sealed in the first sealed container 70 and the second sealed container 80, respectively, By sealing these chemicals in a sealed container in advance, not only the assembly work of the cylinder type gas generator 1A is facilitated, but it is also unnecessary to separately perform a hermetic treatment on the housing 10, thereby reducing the number of parts. The configuration can be simplified. Therefore, by adopting a configuration like the cylinder type gas generator 1A in the present embodiment, a high performance cylinder type gas generator capable of instantaneously obtaining a desired gas output at the initial stage of operation can be manufactured at low cost. it can.

  3 and 4 are schematic cross-sectional views showing the internal structure of the cylinder type gas generator according to the first and second modifications of the present embodiment. Next, with reference to these FIG. 3 and FIG. 4, it demonstrates in full detail about the cylinder type gas generators 1B and 1C which concern on the 1st and 2nd modification in this Embodiment.

  As shown in FIG. 3, the cylinder type gas generator 1 </ b> B according to the first modification is the same as that in the above-described embodiment in the configuration of the first sealed container 70 and the second sealed container 80 that are housed and disposed in the medicine housing chamber. It is different from the cylinder type gas generator 1A. Specifically, in the cylinder type gas generator 1A in the above-described embodiment, the first sealed container 70 in which the gas generating agent 53 is accommodated and the second sealed container 80 in which the transfer charge 27 is accommodated are separately provided. However, in the cylinder type gas generator 1B according to the present modification, the second hermetic container 80 in which the explosive agent 27 is accommodated is used as the gas. The inside of the 1st airtight container 70 in which the generating agent 53 was accommodated is enclosed. Here, the cap part 72 of the first sealed container 70 also serves as the cup part of the second sealed container 80. By comprising in this way, in addition to the effect acquired when it is set as the cylinder type gas generator 1A in the above-mentioned this Embodiment, the effect which can further facilitate an assembly operation can be acquired.

  As shown in FIG. 4, the cylinder type gas generator 1 </ b> C according to the second modified example is located at a position where the cylinder type gas generator 1 </ b> B according to the first modified example and the cushion material 52 as the crushing preventing member are disposed. It is different. Specifically, in the cylinder type gas generator 1B according to the first modification described above, the cushion material 51 is arranged at the end of the first sealed container 70 on the closing member 14 side. In the cylinder type gas generator 1 </ b> C according to the example, this is disposed at the end of the first sealed container 70 on the filter 60 side. Even in such a configuration, as shown in FIG. 4, by providing an opening at a substantially central portion of the cushion material 51, the flow of the combustion gas generated at the initial stage of operation may be hindered by the cushion material 51. Since it can prevent, the effect similar to the case where it is set as the cylinder type gas generator 1B which concerns on the 2nd modification mentioned above can be acquired.

(Embodiment 2)
FIG. 5 is a schematic cross-sectional view showing the internal structure of the cylinder-type gas generator according to Embodiment 2 of the present invention. Below, with reference to this FIG. 5, the internal structure of cylinder type gas generator 1D in this Embodiment is demonstrated. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the cylinder type gas generator 1A in Embodiment 1 of this invention mentioned above, and the description is not repeated here.

  As shown in FIG. 5, the cylinder type gas generator 1 </ b> D in the present embodiment has a partition plate 40 as a partition member at a predetermined position in the space inside the housing 10. The partition plate 40 is disposed at a boundary portion between the region in which the filter 60 is accommodated and the medicine accommodating chamber, and divides the space inside the housing 10 in the axial direction. The partition plate 40 continuously extends from the inner peripheral edge of the annular plate portion 41 into the hollow opening 61 of the filter 60 and covers the axial end surface of the filter 60 on the closing member 14 side. A cylindrical portion 42 that covers the inner peripheral surface of the 60 near the end surface in the axial direction, and a communication hole 43 that is defined by the inner peripheral surface of the cylindrical portion 42 and communicates the region in which the filter 60 is accommodated with the medicine accommodating chamber. Including. The partition plate 40 is preferably attached in advance to the axial end portion of the filter 60, and cannot be moved in the axial direction by the caulking portion 13c provided in the cylindrical member 11 when the cylinder type gas generator 1D is assembled. Fixed.

  The partition plate 40 is formed by, for example, pressing a metal plate-like member such as stainless steel, steel, aluminum alloy, stainless steel alloy, etc., and when the cylinder type gas generator 1D is operated, It functions as a pressure partition that maintains the internal pressure and prevents the filter 60 from being damaged.

  By adopting a configuration like the cylinder type gas generator 1D in the present embodiment described above, in addition to the effects of the cylinder type gas generator 1A in the first embodiment of the present invention described above, the operation In some cases, the partition plate 40 serving as a pressure partition keeps the internal pressure of the medicine storage chamber high, and the combustion of the gas generating agent 53 is promoted. In addition, by adopting the above configuration, the high-temperature and high-pressure combustion gas generated in the medicine storage chamber can be decompressed by the communication hole 43 provided in the partition plate 40 and flow into the region in which the filter 60 is stored. Therefore, the filter 60 can be prevented from being damaged, and the flow rate of the combustion gas ejected from the gas ejection port 12 can be appropriately adjusted by appropriately adjusting the size of the communication hole 43. Become. Therefore, it can be set as a cylinder type gas generator which can adjust gas output easily with high performance.

(Embodiment 3)
FIG. 6 is a schematic cross-sectional view showing the internal structure of the cylinder type gas generator according to Embodiment 3 of the present invention, and FIG. 7 shows the position at which the partition plate of the cylinder type gas generator shown in FIG. 6 is provided. It is the principal part expanded sectional view which expanded the vicinity. 7A is a diagram showing a state immediately after the start of the operation of the cylinder-type gas generator, and FIG. 7B is a diagram showing a state after a predetermined time has elapsed since the start of the operation. Here, in FIGS. 7A and 7B, the flow direction of the combustion gas is indicated by an arrow G. In the following, the internal structure of the cylinder type gas generator 1E in the present embodiment will be described with reference to FIGS. 6, 7A and 7B, and the cylinder type in the present embodiment will be described. The configuration of the partition plate of the gas generator 1E, the assembly structure, and the behavior of the partition plate during operation will be described in detail. In addition, the same code | symbol is attached | subjected in the figure about the part similar to cylinder type gas generator 1D in Embodiment 2 of this invention mentioned above, and the description is not repeated here.

  As shown in FIG. 6, FIG. 7 (A) and FIG. 7 (B), in cylinder type gas generator 1E in the present embodiment, it is arranged at the boundary portion between the region in which filter 60 is accommodated and the medicine accommodating chamber. As the cylindrical portion 42 of the partition plate 40 is moved away from the annular plate portion 41 (away from the drug storage chamber and toward the tip of the cylindrical portion 42), the opening portion of the communication hole 43 is gradually reduced. It has a conical plate shape with a diameter.

  The partition plate 40 is fitted or loosely fitted to the cylindrical member 11, and the cylindrical member 11 is not subjected to caulking processing for fixing the partition plate 40. Here, the fitting includes so-called press-fitting and refers to a state where the outer peripheral end of the annular plate portion 41 of the partition plate 40 is attached in a state of being in contact with the inner peripheral surface of the cylindrical member 11. In addition, the loose fitting means that the outer peripheral end of the annular plate portion 41 of the partition plate 40 and the inner peripheral surface of the cylindrical member 11 are not necessarily in contact with each other over the entire circumference, and are inserted with a slight gap (play). Say state.

  The partition plate 40 is attached to the end of the filter 60 on the side of the medicine storage chamber, and is supported by the cylindrical member 11 by being sandwiched between the filter 60 and the second hermetic container 80 that stores the above-described transfer charge. Has been. In addition, the partition plate 40 is formed by, for example, pressing a metal plate-like member such as stainless steel, steel, an aluminum alloy, or a stainless alloy.

  As shown in FIG. 7A, immediately after the start of the operation of the cylinder type gas generator 1E, the thrust of the high-temperature and high-pressure combustion gas generated in the drug storage chamber (that is, the increase in the internal pressure of the drug storage chamber) , And the annular plate portion 41 of the partition plate 40 receives a force toward the filter 60 along the axial direction of the cylindrical member 11. Thereby, the annular plate portion 41 of the partition plate 40 starts to move toward the filter 60 side, and the portion of the filter 60 surrounded by the partition plate 40 and the cylindrical member 11 (that is, the medicine storage chamber of the filter 60). The portion near the end on the side, the portion included in the region R1 shown in the figure) is compressed along the axial direction of the cylindrical member 11 by the movement of the annular plate portion 41.

  Here, inside the filter 60, there is a void formed by winding or pressing a metal wire or a net member knitted with a metal wire, or by pressing and compacting, as shown in FIG. As shown in FIG. 4, the volume of the gap decreases with the movement of the annular plate portion 41, the metal wire is more densely filled in the region R1, and is along the radial direction of the cylindrical member 11. In order to spread, a force is generated to push the tubular portion 42 of the partition plate 40 inward along the radial direction of the cylindrical member 11. However, a force (a force indicated by an arrow B1 in the figure) directed outward along the generally radial direction of the cylindrical member 11 is applied to the tubular portion 42 of the partition plate 40 as the internal pressure increases. Therefore, the force to push the tubular portion 42 of the partition plate 40 inward along the radial direction of the cylindrical member 11 is defeated by the force, and the reaction force (indicated by the arrow C1 in the figure). Force) is applied to a contact portion between the cylindrical member 11 and the filter 60 (region D1 shown in the drawing). Thereby, a frictional force is generated at the contact portion between the cylindrical member 11 and the filter 60, and the frictional force becomes a braking force that suppresses the partition plate 40 from further moving toward the filter 60 side.

  Here, the reaction force (the force indicated by the arrow C1 in the figure) is a force that acts in a direction that intersects the radial direction and the axial direction of the cylindrical member 11, so that it is divided into a wide range of the cylindrical member 11. It will act as a high braking force that prevents the movement of the plate 40, and the amount of movement of the partition plate 40 will remain small based on the braking force. Therefore, the function as a pressure partition is substantially secured by the partition plate 40 after the movement and the filter 60 which is pressed together with the partition plate 40, and the internal pressure of the medicine storage chamber is kept high. Damage to the filter 60 is prevented. Accordingly, even if the cylindrical member 11 is not caulked to fix the partition plate 40, the partition plate 40 functions sufficiently as a pressure partition.

  Further, in the cylinder type gas generator 1E according to the present embodiment, the cylindrical portion 42 of the partition plate 40 is configured to cover only the vicinity of the end portion of the filter 60 on the drug storage chamber side. Therefore, a state in which a sufficient gap is formed is maintained inside the filter 60 at the portion located in the region R2 shown in FIG. 7B, and the movement and deformation of the partition plate 40 described above are maintained. The combustion gas can flow smoothly in the portion without being affected. Therefore, the combustion gas cooling function and the slag collecting function of the filter 60 are not impaired.

  Furthermore, in the cylinder type gas generator 1E in the present embodiment, when the partition plate 40 and the filter 60 are projected on a plane orthogonal to the axis along the axial direction of the cylindrical member 11, the projection of the filter 60 is performed. The inner edge of the region is configured not to be located inside the inner edge of the projection region of the partition plate 40. That is, the relative positional relationship between the partition plate 40 and the filter 60 is adjusted so that the filter 60 is completely covered by the partition plate 40 when the partition plate 40 and the filter 60 are viewed from the side of the medicine storage chamber. Yes. With this configuration, the high-temperature and high-pressure combustion gas that has passed through the communication hole 43 of the partition plate 40 flows along the inner peripheral surface of the filter 60, so that the combustion gas is directly blown onto the filter 60. The ratio can be greatly reduced.

  In the cylinder type gas generator 1E according to the present embodiment, the partition plate 40 is held by the portion of the filter 60 located in the above-described region R1 during operation, so that the combustion is performed only by the partition plate 40. There is no need to design the partition plate 40 so that it can withstand the thrust force of the gas, and the thickness can be reduced as compared with the prior art. Specifically, when the specifications of a general cylinder type gas generator are taken into account, when a steel material is used as the partition plate 40, it is sufficient that the thickness is approximately 0.7 mm or more.

  As described above, by adopting the configuration like the cylinder type gas generator 1E in the present embodiment, the effect of the cylinder type gas generator 1D in the second embodiment of the present invention described above is achieved. In addition, it is possible to obtain an effect that it is not necessary to carry out caulking processing on the housing 10 for attaching the partition plate 40 and an effect that the partition plate 40 can be thinned. Therefore, when viewed as a cylinder type gas generator as a whole, it is possible to reduce the length, the diameter, and the weight without reducing the performance. In addition, by adopting the above configuration, the work of caulking the partition plate 40 to the housing 10 becomes unnecessary, and the manufacturing cost can be reduced. Therefore, a cylinder type gas generator that can be reduced in size and weight without degrading performance and can be easily manufactured can be provided.

(Embodiment 4)
FIG. 8 is an enlarged cross-sectional view of the main part in which the vicinity of the position where the partition plate of the cylinder type gas generator according to Embodiment 4 of the present invention is provided, and FIG. 8 (A) shows the cylinder type gas generator. FIG. 8B is a diagram illustrating a state after a predetermined time has elapsed from the start of the operation. The cylinder type gas generator 1F in the present embodiment is different only in the structure and assembly structure of the cylinder type gas generator 1E and the partition plate 40 in the above-described third embodiment of the present invention. Since these are the same, description of the other parts will be omitted. 8A and 8B, the flow direction of the combustion gas is indicated by an arrow G.

  As shown in FIG. 8 (A), in the cylinder type gas generator 1F in the present embodiment, the cylindrical portion of the partition plate 40 arranged at the boundary portion between the region in which the filter 60 is accommodated and the medicine accommodating chamber. In a conical plate shape in which the diameter is gradually increased so that the opening area of the communication hole 43 increases as the distance 42 moves away from the annular plate portion 41 (away from the drug storage chamber and toward the tip of the cylindrical portion 42). It is configured.

  The partition plate 40 is fitted or loosely fitted to the cylindrical member 11, and the cylindrical member 11 is not caulked to fix the partition plate 40. Here, the fitting includes so-called press-fitting and refers to a state where the outer peripheral end of the annular plate portion 41 of the partition plate 40 is attached in a state of being in contact with the inner peripheral surface of the cylindrical member 11. In addition, the loose fitting means that the outer peripheral end of the annular plate portion 41 of the partition plate 40 and the inner peripheral surface of the cylindrical member 11 are not necessarily in contact with each other over the entire circumference, and are inserted with a slight gap (play). Say state.

  The partition plate 40 is attached to the end of the filter 60 on the drug storage chamber side, and is sandwiched between the filter 60 and the second sealed container 80 that stores the gas generating agent 52 described above, thereby allowing the inside of the cylindrical member 11 to be sandwiched. Is supported by In addition, the partition plate 40 is formed by, for example, pressing a metal plate-like member such as stainless steel, steel, an aluminum alloy, or a stainless alloy.

  Even when the configuration and the assembly structure of the partition plate 40 as in the present embodiment are adopted, the partition plate 40 is provided with the medicine storage chamber as in the case of the cylinder type gas generator 1E in the third embodiment described above. It functions as a pressure partition that maintains the internal pressure and prevents the filter 60 from being damaged. The reason will be described in detail below.

  As shown in FIG. 8A, immediately after the start of the operation of the cylinder type gas generator 1F, the thrust of the high-temperature and high-pressure combustion gas generated in the drug storage chamber (that is, the increase in the internal pressure of the drug storage chamber). , And the annular plate portion 41 of the partition plate 40 receives a force toward the filter 60 along the axial direction of the cylindrical member 11. Thereby, the annular plate portion 41 of the partition plate 40 starts to move toward the filter 60 side, and the portion of the filter 60 surrounded by the partition plate 40 and the cylindrical member 11 (that is, the medicine storage chamber of the filter 60). The portion near the end on the side, the portion included in the region R1 shown in the figure) is compressed along the axial direction of the cylindrical member 11 by the movement of the annular plate portion 41.

  Here, inside the filter 60, there is a void formed by winding a metal wire or a net material knitted with a metal wire, or by pressing and solidifying the wire, as shown in FIG. As shown in FIG. 4, the volume of the gap decreases with the movement of the annular plate portion 41, the metal wire is more densely filled in the region R1, and is along the radial direction of the cylindrical member 11. In order to spread, a force is generated to push the tubular portion 42 of the partition plate 40 inward along the radial direction of the cylindrical member 11. However, a force (a force indicated by an arrow B2 in the drawing) toward the outside along the generally radial direction of the cylindrical member 11 is applied to the cylindrical portion 42 of the partition plate 40 as the internal pressure increases. Therefore, the force to push the tubular portion 42 of the partition plate 40 inward along the radial direction of the cylindrical member 11 is defeated by the force, and the reaction force (indicated by an arrow C2 in the figure). Force) is applied to the contact portion between the cylindrical member 11 and the filter 60 (region D2 shown in the drawing). Thereby, a frictional force is generated at the contact portion between the cylindrical member 11 and the filter 60, and the frictional force becomes a braking force that suppresses the partition plate 40 from further moving toward the filter 60 side.

  Here, the reaction force (the force indicated by the arrow C2 in the figure) is a force that acts in a direction that intersects the radial direction and the axial direction of the cylindrical member 11, so that the reaction force is divided into a wide range of the cylindrical member 11. It will act as a high braking force that prevents the movement of the plate 40, and the amount of movement of the partition plate 40 will remain small based on the braking force. Therefore, the function as a pressure partition is substantially secured by the partition plate 40 after the movement and the filter 60 which is pressed together with the partition plate 40, and the internal pressure of the medicine storage chamber is kept high. Damage to the filter 60 is prevented. Accordingly, even if the cylindrical member 11 is not caulked to fix the partition plate 40, the partition plate 40 functions sufficiently as a pressure partition.

  Moreover, in the cylinder type gas generator 1F in the present embodiment, the cylindrical portion 42 of the partition plate 40 is configured to cover only the vicinity of the end portion of the filter 60 on the drug storage chamber side. Therefore, a state in which a sufficient gap is formed is maintained inside the filter 60 at the portion located in the region R2 shown in FIG. 8B, and the movement and deformation of the partition plate 40 described above are maintained. The combustion gas can flow smoothly in the portion without being affected. Therefore, the combustion gas cooling function and the slag collecting function of the filter 60 are not impaired.

  Further, in the cylinder type gas generator 1F in the present embodiment, when the partition plate 40 and the filter 60 are projected on a plane orthogonal to the axis along the axial direction of the cylindrical member 11, the projection of the filter 60 is performed. The inner edge of the region is configured not to be located inside the inner edge of the projection region of the partition plate 40. That is, the relative positional relationship between the partition plate 40 and the filter 60 is adjusted so that the filter 60 is completely covered by the partition plate 40 when the partition plate 40 and the filter 60 are viewed from the side of the medicine storage chamber. Yes. With this configuration, the high-temperature and high-pressure combustion gas that has passed through the communication hole 43 of the partition plate 40 flows along the inner peripheral surface of the filter 60, so that the combustion gas is directly blown onto the filter 60. The ratio can be greatly reduced.

  In the cylinder type gas generator 1F in the present embodiment, the partition plate 40 is held by the filter 60 in the portion located in the above-described region R1 during operation, and therefore combustion is performed only by the partition plate 40. There is no need to design the partition plate 40 so that it can withstand the thrust force of the gas, and the thickness can be reduced as compared with the prior art. Specifically, when the specifications of a general cylinder type gas generator are taken into account, when a steel material is used as the partition plate 40, it is sufficient that the thickness is approximately 0.7 mm or more.

  In Embodiments 3 and 4 of the present invention described above, the case where the shape of the cylindrical portion 42 of the partition plate 40 is a conical plate has been described as an example, but the shape of the cylindrical portion 42 is described. Is not limited to this. For example, the cross-sectional shape may be curved. In any case, the shape of the cylindrical portion 42 is such that the force applied to the cylindrical portion 42 as the internal pressure increases acts in a direction that intersects both the radial direction and the axial direction of the cylindrical member 11. And the inner peripheral surface of the cylindrical portion 42 may not be arranged in parallel with the axial direction of the housing 10.

(Embodiment 5)
FIG. 9 is a schematic cross-sectional view showing the internal structure of the cylinder type gas generator in the fifth embodiment of the present invention. Below, with reference to this FIG. 9, the internal structure of the cylinder type gas generator 1G in this Embodiment is demonstrated. In addition, the same code | symbol is attached | subjected in the figure about the part similar to cylinder type gas generator 1D in Embodiment 2 of this invention mentioned above, and the description is not repeated here.

  As shown in FIG. 9, the cylinder type gas generator 1 </ b> G in the present embodiment has a porous plate 90 at a predetermined position inside the medicine storage chamber. The porous plate 90 has a bottomed cylindrical shape, and has a plurality of communication holes 93 in the bottom plate portion 91. The porous plate 90 is inserted into the cylindrical member 11 so that the bottom plate portion 91 is positioned between the first sealed container 70 in which the gas generating agent 53 is accommodated and the second sealed container 80 in which the transfer charge 27 is accommodated. The front end of the peripheral wall portion 92 is abutted against the partition plate 40.

  The communication holes 93 provided in the perforated plate 90 are all formed smaller than the outer shape of the gas generating agent 53. The perforated plate 90 corresponds to an entry preventing member for preventing the gas generating agent 53 from entering the filter chamber, and preferably a metal member such as stainless steel, steel, aluminum alloy, stainless alloy or the like is used. . The perforated plate 90 also has a function of rectifying the flow of combustion gas passing through the perforated plate 90 during operation.

  By adopting a configuration like the cylinder type gas generator 1G in the present embodiment described above, in addition to the effects of the cylinder type gas generator 1D in the second embodiment of the present invention described above, the operation In some cases, the gas generating agent 53 can be prevented from being blocked by the perforated plate 90 and moving to the filter chamber side. Therefore, the internal pressure of the drug storage chamber in the portion where the gas generating agent 53 is stored can be maintained high, and the combustion of the gas generating agent 53 can be further promoted. On the other hand, the bottom plate portion 91 of the perforated plate 90 is disposed between the first sealed container 70 in which the gas generating agent 53 is accommodated and the second sealed container 80 in which the transfer charge 27 is accommodated, thereby igniting. Since the ignition of the charge transfer agent 27 by the vessel 30 is not hindered by the perforated plate 90, the ignition performance is not lowered. Therefore, by adopting the above configuration, it is possible to provide a cylinder-type gas generator that has high performance and can easily adjust the gas output.

  In Embodiments 1 to 5 of the present invention described above, a cylinder type gas generator in which a charge transfer agent is loaded in order to promote combustion of the gas generation agent has been described as an example. The explosive is not necessarily an essential component, and it is possible to eliminate the need to load the explosive by improving the sensitivity of the gas generating agent for starting combustion. Moreover, also when employ | adopting the structure which loads a transfer charge to a cylinder type gas generator, it is also possible to integrate the said transfer charge in an igniter, and to assemble | attach.

  In the first to fifth embodiments of the present invention described above, the case where the present invention is applied to a cylinder type gas generator incorporated in a side airbag device is described as an example. The scope of application is not limited to this, and a so-called T-shaped gas generator having a long gas output portion similar to a cylinder-type gas generator or a cylinder-type gas generator incorporated in a passenger-side airbag device. The same applies to the generator.

  As described above, the above-described embodiments and modifications thereof disclosed herein are illustrative in all respects and are 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 to 1G Cylinder type gas generator, 10 housing, 11 cylindrical member, 12 gas outlet, 13a to 13c caulking part, 14 closing member, 14a groove, 20 holder, 21 groove, 22 hollow part, 24 resin molding part, 27 transfer powder, 30 igniter, 31 ignition part, 32 terminal pin, 40 partition plate, 41 annular plate part, 42 cylindrical part, 43 communication hole, 51, 52 cushion material, 53 gas generating agent, 60 filter, 61 hollow Opening part, 70 1st airtight container, 71 cup part, 72 cap part, 74 accommodation space, 80 2nd airtight container, 81 cup part, 82 cap part, 84 accommodation space, 90 perforated plate, 91 bottom plate part, 92 peripheral wall part , 93 communication holes.

Claims (13)

A long cylindrical housing in which one end and the other end in the axial direction are closed;
An igniter attached to the one end of the housing so as to face a space inside the housing;
Among the internal space of the housing, a plurality of granular gas generating agents arranged at a position near the other end of the housing;
A filter disposed in a position closer to the one end of the housing than a position in which the gas generating agent is disposed in a space inside the housing;
The filter is a cylindrical member having a hollow opening extending along the axial direction of the housing,
The housing has a gas outlet on a peripheral wall of a portion where the filter is disposed,
The gas generator is sealed in a first sealed container inserted into the housing. Of the space inside the housing, the position closer to the one end of the housing than the position where the gas generating agent is disposed, and the position closer to the other end of the housing than the position where the filter is disposed And further comprising a plurality of granular explosives disposed in the
The gas generator according to claim 1, wherein the transfer charge is enclosed in a second sealed container inserted into the housing.   One axial end of the filter is pressed against the one end of the housing, and the other axial end of the filter is held in the radial direction by caulking the peripheral wall of the housing inward. The gas generator according to claim 2, wherein the filter is fixed to the housing.   The gas generator according to claim 2 or 3, wherein the first sealed container and the second sealed container are arranged side by side in the axial direction of the housing.   The gas generator according to claim 2 or 3, wherein the second sealed container is disposed inside the first sealed container.   The gas generator according to any one of claims 2 to 5, wherein a crushing prevention member for preventing crushing of the gas generating agent due to vibration is accommodated in the first sealed container. The igniter includes an igniter that contains an igniting agent that ignites during operation, and a terminal pin connected to the igniting unit to ignite the igniting agent,
The gas generator according to any one of claims 2 to 6, wherein the ignition unit is inserted into the hollow opening of the filter located near the one end of the housing.   An internal space of the housing is partitioned in an axial direction into a medicine storage chamber in which the first sealed container and the second sealed container are housed and a filter chamber in which the filter is housed. The gas generator according to any one of claims 2 to 7, further comprising a partition member having a communication hole communicating with the filter chamber. The partition member continuously extends from the inner peripheral edge of the annular plate portion toward the hollow opening of the filter, covering the axial end surface of the filter on the drug storage chamber side. A cylindrical portion covering an inner peripheral surface near the axial end surface,
The communication hole is defined by an inner peripheral surface of the cylindrical portion,
The gas generator according to claim 8, wherein an opening area of the communication hole changes as the distance from the annular plate portion increases.   10. The gas generator according to claim 9, wherein the cylindrical portion is gradually reduced in diameter or increased in diameter so that an opening area of the communication hole decreases or increases as the distance from the annular plate portion increases.   The gas generator according to claim 9 or 10, wherein the partition member is fitted or loosely fitted to the housing.   The filter is obtained by winding a metal wire in a cylindrical shape so that a void is included therein, or by pressing and solidifying a metal wire in a cylindrical shape so that a void is included therein. The gas generator according to any one of 11.   When the partition member and the filter are projected on a plane perpendicular to the axial direction along the axial direction of the housing, the inner edge of the projection area of the filter is located inside the inner edge of the projection area of the partition member. 13. A gas generator according to any of claims 8 to 12, which is not located.

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