JP2016117298A - Gas generator - Google Patents

Abstract

To provide a gas generator capable of achieving both smooth gas discharge and efficient gas cooling. A gas generator 1A includes a partition member 40A and a partition member 60 that partition a space inside a housing into a combustion chamber S1, a gas passage chamber S2, and a gas discharge chamber S3. The partition member 60 has a cylindrical portion 61 that partitions a space inside the housing in the radial direction, and the partition member 40A has a partition portion 41 that separates the space inside the cylindrical portion 61 in the axial direction. The cylindrical portion 61 is provided with a first communication hole 64 for communicating the combustion chamber S1 and the gas passage chamber S2, and a second communication hole 65 for communicating the gas passage chamber S2 and the gas discharge chamber S3. A solid rod portion 42 is provided in the portion corresponding to the space inside the cylindrical portion 61 in the gas discharge chamber S3 so as to face the second communication hole 65. [Selection] Figure 1

Description

  The present invention relates to a gas generator incorporated in an airbag device as an occupant protection device installed in an automobile or the like, and more particularly to a 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. The airbag device is equipped for the purpose of protecting the occupant from the impact generated at the time of the collision of the vehicle, etc. It is something that catches. 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 so-called cylinder type gas generator. The cylinder type gas generator has a long cylindrical shape, and is suitably incorporated in a side airbag device, a passenger side airbag device, a curtain airbag device, a knee airbag device, a seat cushion airbag device, and the like. .

  Usually, in a cylinder-type gas generator, an igniter is installed at one end of the housing in the axial direction, and a combustion chamber containing a gas generating agent is provided in the central portion of the housing in the axial direction. A filter chamber containing a filter is provided at the other end, and a gas outlet is provided in a peripheral wall portion of the housing that defines the filter chamber. In the cylinder type gas generator configured in this way, in general, gas generated in the combustion chamber flows into the filter chamber to pass through the inside of the filter, and the gas after passing through the filter passes through the gas outlet. Will be ejected to the outside. As a gas generator having a long cylindrical outer shape, there is a so-called T-shaped gas generator other than the cylinder type gas generator.

  Here, as a cylinder type gas generator capable of improving the cooling efficiency of the gas generated in the combustion chamber, there is one disclosed in JP-A-11-245760 (Patent Document 1). In the cylinder type gas generator disclosed in Patent Document 1, the flow path is configured so that the gas generated in the combustion chamber is once blown to the peripheral wall portion of the housing before flowing into the filter chamber. Is.

  Specifically, in the cylinder type gas generator disclosed in Patent Document 1, a partition member that partitions the space inside the long, substantially cylindrical housing in the axial direction is provided inside the housing, and the partition member A wire mesh screen is installed coaxially with the housing in the space closer to the igniter, and a filter is installed in a space opposite to the side where the igniter is located when viewed from the partition member. The gas generating agent is accommodated in the portion located on the igniter side in the space inside the screen, and the cup-shaped member is installed in the portion located on the filter side in the space inside the screen. Has been.

  With the configuration described above, the high-temperature gas generated by the combustion of the gas generating agent once moves toward the outside in the radial direction of the housing, passes through the screen, and is sprayed on the inner peripheral surface of the housing. Then, it flows into the inside of the cup-shaped member via the communication hole provided in the cup-shaped member, and then flows into the filter via the communication hole provided in the partition member. Therefore, since the high-temperature gas generated in the combustion chamber is cooled by the housing having a relatively low temperature outside the screen before reaching the filter, the cooling efficiency of the gas is improved. .

  In addition, as another cylinder type gas generator in which the flow path is configured so that the gas generated in the combustion chamber is once blown to the peripheral wall portion of the housing before being ejected to the outside of the housing, for example, There exists a thing disclosed in Table 2008-546513 gazette (patent document 2). In the cylinder type gas generator disclosed in Patent Document 2, a partition portion is formed so that a space inside the housing is partitioned in a radial direction by a cylindrical partition member and the interior of the partition member is separated in the axial direction. Among the spaces partitioned by the partition wall, the gas generating agent is accommodated in the space where the igniter is installed, and the space facing the gas outlet provided in the housing is hollow. A cylindrical member is installed.

  In the cylinder type gas generator configured as described above, the high-temperature gas generated by the combustion of the gas generating agent is once directed outwardly in the radial direction of the housing through the communication hole provided in the partition member. To the space facing the gas jetting port among the spaces partitioned by the partition wall through the other communication holes provided in the partition member. It flows into the gas jet port through a labyrinth channel formed by installing the cylindrical member in the space. Therefore, the high-temperature gas generated in the combustion chamber is cooled by the housing having a relatively low temperature outside the partition member, so that the gas cooling efficiency is improved and the labyrinth flow described above is achieved. By further passing through the path, the gas cooling efficiency can be further improved.

Japanese Patent Laid-Open No. 11-245760 Special table 2008-546513 gazette

  However, although the cylinder type gas generator disclosed in Patent Document 1 is configured to actively cool the gas by the peripheral wall portion of the housing, it is still improved from the viewpoint of further efficient cooling of the gas. It can be said that there is room for.

  On the other hand, the cylinder-type gas generator disclosed in Patent Document 2 has a hollow cylindrical member arranged in a space facing the gas jetting port in a space partitioned by a partition wall. Since it further includes a configuration in which the flow path is made into a labyrinth, it can be said that it is superior to the gas generator disclosed in Patent Document 1 from the viewpoint of efficient gas cooling. However, the cylinder type gas generator has a problem that the flow resistance to the gas is increased by the amount of the maze of the flow path, and it is difficult to smoothly discharge the gas.

  That is, the cylinder type gas generator disclosed in Patent Document 2 has a hollow cylindrical member disposed in a space facing the gas outlet, so that the gas flow direction is substantially along the axial direction of the housing. Since it is configured to include a portion that is folded back by 180 degrees, a very large flow resistance is generated in the portion, and smooth discharge of gas is hindered. As a result, when this configuration is adopted, it may take time to discharge gas in the initial stage of operation of the gas generator, or the amount of gas emission may be reduced throughout the operation phase of the gas generator. Concerns arise.

  In addition, in the configuration disclosed in Patent Document 2, the cylinder-type gas generator has a triple-pipe structure in the portion where the above-described cylindrical member is disposed, and therefore a flow path is more than necessary in the portion. The problem of being narrowed down can occur. In general, in a cylinder type gas generator, it is necessary to maintain the internal pressure of the combustion chamber at a high level so that the combustion of the gas generating agent is maintained during operation. Although it is indispensable that the flow path is properly throttled at any position of the flow path, the cross-sectional area of the flow path of the narrowed portion generally does not need to be extremely small. However, in the cylinder-type gas generator disclosed in Patent Document 2, even if the cross-sectional area of the gas flow path is the maximum in the portion having the triple pipe structure, the cross-sectional area of the housing cannot be substantially divided into three areas. For this reason, as described above, there may occur a problem that the flow path is restricted more than necessary.

  Also in this sense, when the configuration disclosed in Patent Document 2 is adopted, a very large flow resistance is generated in the portion where the cylindrical member described above is arranged, and smooth gas outflow occurs. Will be disturbed. In particular, when the flow path is restricted more than necessary, the internal pressure of the combustion chamber at the time of operation becomes higher than necessary, so that it is necessary to give the housing etc. high pressure resistance performance accordingly. Therefore, there arises a problem that it becomes difficult to reduce the weight and the manufacturing cost.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a gas generator capable of achieving both smooth gas discharge and efficient gas cooling. .

  The gas generator based on this invention is provided with the housing, the igniter, the division member, and the partition member. The housing includes a combustion chamber in which a gas generating agent is disposed, a gas discharge chamber that discharges gas generated in the combustion chamber toward the outside, and a gas passage chamber that connects the combustion chamber and the gas discharge chamber. It is comprised by the elongate cylindrical member with which the one end part and other end part of the axial direction were obstruct | occluded. The igniter is assembled to the one end of the housing so as to face the combustion chamber. The partition member and the partition member are located inside the housing, and the space inside the housing is divided into the combustion chamber, the gas discharge chamber, and the gas passage chamber. The partition member has a cylindrical portion that partitions the space inside the housing in the radial direction by being arranged so that the axial direction thereof is substantially parallel to the axial direction of the housing. The said partition member has a partition part which divides the space inside the said cylindrical part to an axial direction by arrange | positioning inside the said cylindrical part. The combustion chamber is a space closer to the one end portion of the housing than the partition wall portion and includes a space inside the cylindrical portion. The gas passage chamber includes a space outside the cylindrical portion. The gas discharge chamber is a space on the other end side of the housing with respect to the partition wall, and a space on the inner side of the cylindrical portion, and a space on the other end side of the housing with respect to the partition member. Including. A first communication hole for communicating the combustion chamber and the gas passage chamber is provided in a portion of the cylindrical portion that divides the combustion chamber and the gas passage chamber. A second communication hole for communicating the gas passage chamber and the gas discharge chamber is provided in a portion of the cylindrical portion that divides the gas passage chamber and the gas discharge chamber. A portion of the housing defining the gas discharge chamber is provided with a gas outlet for ejecting gas toward the outside of the housing. In the gas generator according to the present invention, in the axial direction of the cylindrical portion so as to face the second communication hole in a portion corresponding to the space inside the cylindrical portion of the gas discharge chamber. A solid rod portion extending along the surface is provided.

  In the aspect with the gas generator based on the said invention, the said gas generator may further be equipped with the partition part arrange | positioned at the said other end part side of the said housing rather than the said partition member. The partition portion divides the space inside the housing in the axial direction so that the gas discharge chamber is located on the one end side of the housing and on the other end side of the housing. Partitioning into a second space. In this case, it is preferable that the gas ejection port is provided in a portion of the housing that defines the second space, and the partition portion communicates the first space and the second space. It is preferable that a third communication hole is provided. In that case, the rod portion may be located only in the first space.

  In the above aspect of the gas generator according to the present invention, of the total opening areas of the first communication hole, the second communication hole, the third communication hole, and the gas outlet, the third communication hole is provided. It is preferable that the total opening area of the holes is the smallest.

  In the above-described aspect of the gas generator according to the present invention, it is preferable that the rod portion is erected from the partition wall portion and / or the partition portion.

  In the above aspect of the gas generator according to the present invention, the rod part and the partition part are configured by a part of the partition member, so that the rod part, the partition part, and the partition part are formed. , And may be composed of a single integrated part.

  In the above-described aspect of the gas generator according to the present invention, a filter through which the gas generated in the combustion chamber passes may be disposed in the second space.

  In another aspect of the gas generator according to the present invention, the gas generator may not include the partition part. In that case, it is preferable that the rod portion is erected from the partition wall portion.

  In the other aspect of the gas generator according to the present invention, the rod portion is constituted by a part of the partition member, so that the rod portion and the partition portion are integrated into a single unit. It may be composed of parts.

  In the other aspect of the gas generator according to the present invention, the rod portion may be in contact with the other end portion of the housing.

  In the gas generator according to the present invention, the partition member has an axial end located on the one end side of the housing and / or an end of the skirt whose diameter is larger than that of the cylindrical portion. You may have in the axial direction edge part located in the said other end part side, and it is preferable that the said skirt part is in contact with the surrounding wall part of the said housing in that case.

  In the gas generator according to the present invention, a wound body of a metal wire may be extrapolated to the rod portion.

  ADVANTAGE OF THE INVENTION According to this invention, it can be set as the gas generator in which coexistence with smooth gas discharge | emission and efficient gas cooling was achieved.

It is the schematic of the cylinder type gas generator in Embodiment 1 of this invention. It is an expanded sectional view of the igniter vicinity of the cylinder type gas generator shown in FIG. It is an expanded sectional view of the gas outlet vicinity of the cylinder type gas generator shown in FIG. FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 3. It is sectional drawing along the VV line shown in FIG. It is the figure which represented typically the flow of the gas at the time of the action | operation of the cylinder type gas generator shown in FIG. It is the schematic of the gas jet nozzle vicinity of the cylinder type gas generator in Embodiment 2 of this invention. It is the schematic of the gas jet nozzle vicinity of the cylinder type gas generator in Embodiment 3 of this invention. It is the schematic of the gas jet nozzle vicinity of the cylinder type gas generator in Embodiment 4 of this invention. It is the schematic of the gas jet nozzle vicinity of the cylinder type gas generator in Embodiment 5 of this invention. It is the schematic of the gas jet nozzle vicinity of the cylinder type gas generator in Embodiment 6 of this invention.

  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 cylinder type gas generator incorporated in a side airbag device. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a schematic diagram of a cylinder type gas generator according to Embodiment 1 of the present invention. 2 and 3 are an enlarged sectional view in the vicinity of the igniter and an enlarged sectional view in the vicinity of the gas outlet of the cylinder type gas generator shown in FIG. 1, respectively. 4 and 5 are sectional views taken along lines IV-IV and VV shown in FIG. 3, respectively. First, with reference to these FIG. 1 thru | or FIG. 5, the structure of 1 A of cylinder type gas generators in this Embodiment is demonstrated.

  As shown in FIGS. 1 to 3, the cylinder type gas generator 1 </ b> A in the present embodiment has a long cylindrical outer shape, and one end and the other end positioned in the axial direction are closed. It has a housing. In the space provided inside the housing, an igniter 30 as an internal component, a partition member 40A, a partition member 60, a gas generating agent 70, a cushion member 80, a filter 90, and the like are arranged. The space provided inside the housing is divided into a plurality of spaces by the partition member 40A and the partition member 60 described above, and the combustion chamber S1 in which the gas generating agent 70 is mainly accommodated in the plurality of spaces. And a gas discharge chamber S3 for discharging the gas generated in the combustion chamber S1 toward the outside of the housing, and a gas passage chamber S2 connecting the combustion chamber S1 and the gas discharge chamber S3.

  The housing has a bottomed long cylindrical housing main body 10 that is closed on one side in the axial direction and has a peripheral wall portion 11 and a closing portion 12, and a through portion 21 that extends along the same direction as the axial direction of the housing main body 10. A cylindrical holder 20 is used. The holder 20 has an annular groove 23 for caulking and fixing, which will be described later, at a predetermined position on the outer peripheral surface thereof. The annular groove 23 is formed on the outer peripheral surface of the holder 20 so as to extend in the circumferential direction. Yes.

  The holder 20 is fixed to the housing body 10 so as to close the opening end of the housing body 10. Specifically, in a state where the holder 20 is inserted into the opening end of the housing body 10, the peripheral wall portion 11 of the housing body 10 corresponding to the annular groove portion 23 provided on the outer peripheral surface of the holder 20 is radially aligned. The holder 20 is caulked and fixed to the housing body 10 by reducing the diameter toward the inside and engaging with the annular groove 23. As a result, one end of the housing in the axial direction is constituted by the holder 20, and the other end in the axial direction of the housing is constituted by the closing portion 12 of the housing body 10.

  The caulking fixing is caulking fixing called eight-side caulking, in which the diameter of the peripheral wall portion 11 of the housing body 10 is reduced substantially uniformly toward the inside in the radial direction. By performing this caulking, the caulking portion 14 is provided on the peripheral wall portion 11 of the housing body 10, and the caulking portion 14 comes into close contact with the annular groove portion 23. This prevents a gap from being generated between the housing body 10 and the holder 20.

  The housing body 10 may be made of a metal member such as stainless steel, steel, an aluminum alloy, or a stainless alloy, or is formed into a bottomed cylindrical shape by pressing a rolled steel plate represented by SPCE. Even if it is constituted by a metal press-molded product made of metal or a metal molded product molded into a bottomed cylindrical shape by closing one of the axial ends of an electric resistance welded pipe represented by STKM Good. In particular, when the housing main body 10 is formed of a rolled steel plate press-formed product or an electric-welded tube molded product, the housing main body is cheaper and easier than using a metal member such as stainless steel or steel. 10 can be formed, and the weight can be significantly reduced. On the other hand, the holder 20 is made of a metal member such as stainless steel, steel, an aluminum alloy, or a stainless alloy.

  As shown in FIGS. 1 and 2, the igniter 30 is supported by the holder 20 and assembled to the above-described one end portion in the axial direction of the housing. The igniter 30 is for burning the gas generating agent 70 and is installed so as to face the space inside the housing. More specifically, the holder 20 has a caulking portion 22 for caulking and fixing the igniter 30 at an axial end facing the space inside the housing, and the igniter 30 is connected to the penetration portion 21. The igniter 30 is clamped and fixed to the holder 20 by caulking the above-described caulking portion 22 in a state where the caulking portion 22 is caulked with the wall portion of the holder 20 defining the penetrating portion 21 of the holder 20.

  The igniter 30 includes an ignition unit 31 and a pair of terminal pins 32. A resistor (bridge wire) is attached to the inside of the ignition unit 31 so as to be connected to the pair of terminal pins 32, and the ignition unit 31 is surrounded by or in contact with the resistor. Filled with sparks. Moreover, in the ignition part 31, the transfer charge may be loaded as needed.

Here, the resistance body is generally a nichrome wire or a resistance wire made of an alloy containing platinum and tungsten, and the igniter is generally ZPP (zirconium / potassium perchlorate) or ZWPP (zirconium / tungsten / peroxide). Potassium chlorate), lead tricynate and the like are used. As the transfer _charge, consisting of _{B / KNO 3, B / NaNO} 3, Sr (NO 3) such as composition and consisting of metal powder / oxidant represented by _2, potassium titanium hydride / perchloric acid composition And a composition composed of B / 5-aminotetrazole / potassium nitrate / molybdenum trioxide. The squib cup that surrounds the ignition unit 31 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 agent starts burning. The high temperature flame generated by the combustion ruptures the squib cup containing the igniting agent. The time from when the current flows through the resistor until the igniter 30 is activated is generally 2 milliseconds or less when a nichrome wire is used as the resistor.

  On the outer peripheral surface of the holder 20, another annular groove portion 24 different from the above-described annular groove portion 23 is provided. A seal member 26 made of an O-ring or the like is accommodated in the annular groove portion 24. Thereby, the sealing member 26 accommodated in the annular groove part 24 provided in the holder 20 will be pinched | interposed by the said holder 20 and the surrounding wall part 11 of the housing main body 10, and the airtightness in the said part is ensured. It will be.

  Further, a seal member 27 made of an O-ring or the like is interposed between the igniter 30 and the holder 20. The seal member 27 is for preventing a gap from being generated between the igniter 30 and the holder 20, and thereby the space inside the housing is hermetically sealed.

  A recess 25 is provided at the end in the axial direction that is exposed to the outside of the holder 20 so as to be continuous with the through-hole 21 described above. The hollow portion 25 forms a female connector portion that receives a male connector (not shown) of a harness for connecting the igniter 30 and a control unit (not shown). The portion near the tip of the terminal pin 32 of the igniter 30 is exposed and positioned. A male connector is inserted into the recess 25 as the female connector, thereby realizing electrical continuity between the harness core wire and the terminal pin 32.

  The assembly structure of the igniter 30 with respect to the housing and the seal structure between the housing and the igniter 30 are not limited to the above-described assembly structure or seal structure, and other assembly structures or seal structures may be used. Of course it is good to adopt.

  As shown in FIGS. 1 and 3, a partition member 40 </ b> A and a partition member 60 are arranged at predetermined positions in the space inside the housing. The partition member 40A and the partition member 60 function as members that divide the space inside the housing from each other as described above.

  The partition member 40 </ b> A includes a partition part 41 and a partition part 43, which are a pair of disk-shaped parts, and a columnar rod part 42 that connects the partition part 41 and the partition part 43. The partition wall portion 41 and the partition portion 43 are arranged so that their main surfaces are substantially orthogonal to the axial direction of the housing, and the rod portion 42 is arranged so that the axial direction is substantially parallel to the axial direction of the housing. Has been.

  The partition member 40 </ b> A is disposed at an intermediate position in the axial direction of the housing body 10, and is fixed to the housing body 10. Specifically, in a state where the partition wall member 40A is inserted into the housing body 10, the peripheral wall portion 11 of the housing body 10 corresponding to the annular groove portion 44 provided on the outer peripheral surface of the partition portion 43 of the partition wall member 40A. The partition wall member 40 </ b> A is caulked and fixed to the housing body 10 by reducing the diameter toward the inside in the radial direction and engaging with the annular groove 44. Thereby, the space inside the housing is partitioned in the axial direction by the partition portion 43.

  The caulking is also caulking, which is called the above-mentioned caulking. By performing this caulking, the caulking portion 15 is provided on the peripheral wall portion 11 of the housing body 10, and the caulking portion 15 comes into close contact with the annular groove portion 44. This prevents a gap from being generated between the housing body 10 and the partition member 40A.

  Here, the annular groove 44 accommodates a seal member 47 made of an O-ring or the like. Thereby, the seal member 47 accommodated in the annular groove 44 provided in the partition portion 43 is sandwiched between the partition portion 43 and the peripheral wall portion 11 of the housing body 10 when the caulking is fixed. The airtightness in the case will be ensured.

  In addition, the partition member 40A is comprised by metal members, such as stainless steel, steel, an aluminum alloy, a stainless alloy, etc. similarly to the holder 20 mentioned above. Here, the rod portion 42 of the partition member 40A is formed in a solid shape so as to have a larger heat capacity.

  Moreover, the seal tape 46 is affixed on the main surface located in the closure part 12 side of the housing main body 10 among a pair of main surfaces of the partition part 43 of the partition member 40A. The seal tape 46 is for closing a plurality of third communication holes 45 provided in a partition portion 43 to be described later. As the seal tape 46, an aluminum foil or the like coated with an adhesive member on one side is used. Used.

  On the other hand, the partition member 60 has a long cylindrical tubular portion 61 and a skirt portion 62 provided at one axial end of the tubular portion 61. The cylindrical portion 61 is arranged so that the axial direction thereof is substantially parallel to the axial direction of the housing body 10, whereby the space inside the housing is partitioned in the radial direction by the cylindrical portion 61. . The skirt portion 62 is formed so as to expand radially outward from the above-described one end side of the housing of the cylindrical portion 61, and a part of the skirt portion 62 is formed at the outer edge portion of the space inside the housing. Are partitioned in the axial direction.

  The partition member 60 is positioned between the partition member 40A and the holder 20 so as to be adjacent to the partition member 40A fixed to the housing body 10, and is fixed to the housing body 10 and the partition member 40A. Specifically, the end of the partition member 60 on the partition member 40A side is abutted so as to contact the partition portion 43 of the partition member 40A, and the skirt is the end of the partition member 60 on the holder 20 side. A part of the portion 62 is disposed so as to contact the inner peripheral surface of the peripheral wall portion 11 of the housing body 10. Thereby, the partition member 60 is arrange | positioned with predetermined distance from each of the one end part and other end part which were mentioned above of the housing in the axial direction of the housing.

  The partition member 60 is formed of a member having a sufficiently high mechanical strength so that the gas generating agent 70 does not rupture with an increase in pressure even when the gas generating agent 70 burns. As the partition member 60, for example, a member formed by pressing a metal plate-like member is used, and preferably a steel plate such as ordinary steel or special steel (for example, a cold-rolled steel plate or a stainless steel plate). ) Is used.

  Here, the partition wall portion 41 of the partition wall member 40 </ b> A is disposed at a predetermined position inside the tubular portion 61 of the partition member 60. Specifically, the rod portion 42 of the partition wall member 40 </ b> A is erected from the partition portion 43 so as to be inserted into the cylindrical portion 61 of the partition member 60, so that the partition wall portion 41 is connected to the axis of the rod portion 42. It is located by entering the inside of the cylindrical portion 61 of the partition member 60 by the length in the direction. Therefore, the inner space of the tubular portion 61 is separated into two spaces in the axial direction by the partition wall portion 41, and the rod portion 42 is located in the space on the partition portion 43 side of the two spaces. It will be. The partition wall portion 41 is preferably press-fitted into the cylindrical portion 61. By comprising in this way, the outer peripheral surface of the partition part 41 and the inner peripheral surface of the cylindrical part 61 will closely_contact | adhere, and it can prevent that a clearance gap produces between these.

  As described above, the space inside the housing is divided into a plurality of spaces by the partition member 40 </ b> A and the partition member 60. Specifically, the inner space of the housing is formed by the cylindrical portion 61 and the skirt portion 62 of the partition member 60 and the outer edge portion of the partition portion 43 of the partition member 40A so that the combustion chamber S1, the gas discharge chamber S3, and the gas passage chamber S2 The combustion chamber S1 and the gas discharge chamber S3 are separated by the partition wall 41 of the partition wall member 40A. Furthermore, the central portion of the partition portion 43 of the partition wall member 40A causes the above-described gas discharge chamber S3 to be separated from the first space S3A located on the partition member 60 side (that is, the one end portion side of the housing) and the housing body 10. It will be partitioned off into the second space S3B located on the closing portion 12 side (that is, the other end portion side of the housing).

  As shown in FIGS. 1 to 3, the space located on the igniter 30 side in the space inside the partition member 60 partitioned by the partition wall 41 described above, and between the igniter 30 and the partition member 60. A gas generating agent 70 is loaded in the combustion chamber S1 constituted by the space located, and the holder 20 and the gas generating agent 70 are disposed in a portion near the igniter 30 in the combustion chamber S1. The cushion member 80 is disposed so as to be interposed between the two.

  The gas generating agent 70 is a chemical that generates gas by being ignited and burned by hot particles generated by the operation of the igniter 30. As the gas generating agent 70, it is preferable to use a non-azide-based gas generating agent, and it is generally configured as a molded body containing a fuel, an oxidizing agent, 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. The oxidizing agent is selected from basic nitrates such as basic copper nitrate, perchlorates such as ammonium perchlorate and potassium perchlorate, alkali metals, alkaline earth metals, transition metals, and ammonia. Nitrate containing cation 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 70 includes various shapes such as a granular shape, a pellet shape, a granular shape such as a cylindrical shape, and a disk shape. In addition, in the cylindrical shape, a porous (for example, a single-hole cylindrical shape or a porous cylindrical shape) having a through hole inside the molded body is also 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 70 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 70, it is preferable to appropriately select the size and the filling amount of the molded body in consideration of the linear combustion rate, the pressure index, etc.

  The cushion member 80 is provided for the purpose of preventing the gas generating agent 70 made of a molded body from being pulverized by vibration or the like, and a spring portion 81 and a pressing portion formed by bending a metal wire. 82. The spring portion 81 is disposed so that one end thereof is in contact with the holder 20, and a pressing portion 82 is formed at the other end. The pressing portion 82 is configured by arranging metal wires approximately in parallel with a predetermined interval, and is in contact with the gas generating agent 70. Thereby, the gas generating agent 70 is urged toward the partition member 40A by the cushion member 80, and is prevented from moving inside the housing. In place of the cushion member 80 as described above, a cushion made of a ceramic fiber molded body, rock wool, foamed resin (for example, foamed silicone, foamed polypropylene, foamed polyethylene, etc.), rubber represented by chloroprene and EPDM, or the like. It is good also as using material.

  Of the internal space of the housing, the second space S3B is a space adjacent to the space where the partition member 40A is disposed and sandwiched between the partition member 40A and the closed portion 12 of the housing body 10. The filter 90 is arranged. The filter 90 is formed of a cylindrical member having a hollow portion extending in the same direction as the axial direction of the housing main body 10, and one end surface in the axial direction is in contact with the closing portion 12, and the other end surface in the axial direction. Is affixed to the partition portion 43 of the partition member 40 </ b> A via the seal tape 46 described above.

  The filter 90 functions as a cooling means for cooling the gas by taking away the high-temperature heat of the gas when the gas generated by the combustion of the gas generating agent 70 passes through the filter 90, and in the gas. It also functions as a removing means for removing slag (residue) and the like contained in. As described above, by using the filter 90 made of a cylindrical member, the flow resistance against the gas can be kept low during operation, and an efficient gas flow can be realized.

  As the filter 90, a filter composed of a metal wire material or a metal net material preferably made of stainless steel or steel can be used. Specifically, a knitted wire mesh, a plain weave wire mesh, an assembly of crimp-woven metal wires, or a material obtained by pressing them together by pressing can be used. Moreover, it can use instead of this what wound the perforated metal plate. In this case, as the perforated metal plate, for example, expanded metal that has been cut in a zigzag pattern on the metal plate and expanded to form a hole and processed into a mesh, In addition, it is possible to use a hook metal or the like that is flattened by crushing burrs generated at the periphery of the hole.

  The first space S3A, which is a space defined by the partition 41 and the partition 43 of the partition member 40A, and the tubular portion 61 of the partition member 60, has the partition member 40A along the axial direction of the housing. Only the rod part 42 is located.

  As shown in FIGS. 1 to 4, a portion of the cylindrical portion 61 of the partition member 60 that partitions the combustion chamber S <b> 1 and the gas passage chamber S <b> 2 (that is, closer to the holder 20 than a portion where the partition wall portion 41 is located). A plurality of first communication holes 64 are provided along the circumferential direction and the axial direction of the cylindrical portion 61 in the positioned cylindrical portion 61). The plurality of first communication holes 64 are for communicating the combustion chamber S1 and the gas passage chamber S2, and allows the gas generated in the combustion chamber S1 to pass through when the gas generating agent 70 burns. Thus, the gas flows out toward the gas passage chamber S2.

  Further, as shown in FIGS. 1, 3 and 5, a portion that divides the gas passage chamber S2 in the cylindrical portion 61 of the partition member 60 and the first space S3A in the gas discharge chamber S3 (that is, A plurality of second communication holes 65 are provided along the circumferential direction and the axial direction of the cylindrical portion 61 in a portion of the cylindrical portion 61) which is located closer to the closing portion 12 than the portion where the partition wall portion 41 is located. Yes. The plurality of second communication holes 65 are for communicating the gas passage chamber S2 and the gas discharge chamber S3, and allow the gas flowing into the gas passage chamber S2 to pass therethrough, thereby causing the gas to pass through the gas discharge chamber S3. It is for making it flow toward the said 1st space S3A. Here, each of the plurality of second communication holes 65 is provided so as to face the rod portion 42 of the partition member 40A.

  In addition, as shown in FIGS. 1, 3, and 5, a plurality of third communication holes 45 are provided in the partition portion 43 of the partition wall member 40 </ b> A along the circumferential direction. The plurality of third communication holes 45 are for communicating the first space S3A and the second space S3B, and allow the gas flowing into the first space S3A to pass therethrough, thereby allowing the gas to pass through the first space S3A. It is for making it flow toward 2nd space S3B. Here, the plurality of third communication holes 45 provided in the partition portion 43 are closed by a seal tape 46 attached to the partition portion 43. Thereby, when the cylinder type gas generator 1A is not operated, the airtightness of the combustion chamber S1, the gas passage chamber S2, and the first space S3A is ensured.

  On the other hand, as shown in FIGS. 1 and 3, a plurality of gas outlets 13 are provided along the circumferential direction and the axial direction of the peripheral wall portion 11 in the peripheral wall portion 11 of the housing facing the filter 90. . The plurality of gas ejection ports 13 are for communicating the space inside the housing and the outside space, and for guiding the gas after passing through the filter 90 to the outside of the housing.

  FIG. 6 is a diagram schematically showing a gas flow when the cylinder type gas generator shown in FIG. 1 is operated. Next, with reference to this FIG. 6, the operation | movement at the time of the action | operation of the cylinder type gas generator 1A in this Embodiment is demonstrated.

  When a vehicle equipped with the cylinder type gas generator 1A according to the present embodiment collides, a collision is detected by a collision detection means provided separately in the vehicle, and a control unit provided separately in the vehicle based on this is detected. The igniter 30 is actuated by energization from.

  As shown in FIG. 6, the gas generating agent 70 loaded in the combustion chamber S1 is ignited and burned by the flame generated by the operation of the igniter 30, and generates a large amount of gas. As a result, the gas generated in the combustion chamber S1 flows into the gas passage chamber S2 through the first communication hole 64 provided in the partition member 60. At that time, the gas flowing into the gas passage chamber S2 is blown to the inner peripheral surface of the peripheral wall portion 11 of the housing main body 10 along the radial direction of the housing, and the slag contained in the gas is transferred to the peripheral wall portion 11. It is removed to some extent by adhering to the inner peripheral surface of the.

  The gas blown to the inner peripheral surface of the peripheral wall portion 11 of the housing body 10 then flows in the gas passage chamber S2 along the axial direction of the housing. At that time, the gas is brought into contact with the peripheral wall portion 11 of the housing body 10 so that the heat is removed and the gas is cooled. Thereafter, the gas flowing through the gas passage chamber S2 flows into the first space S3A in the gas discharge chamber S3 through the second communication hole 65 provided in the partition member 60.

  The gas that has flowed into the first space S3A is blown onto the rod portion 42 disposed in the first space S3A. Here, since the rod portion 42 is configured to be solid so as to have a larger heat capacity as described above, the gas blown to the rod portion 42 is applied to the outer peripheral surface of the rod portion 42. The contact removes heat and further cools, and the slag contained in the gas is further removed by adhering to the outer peripheral surface of the rod portion 42.

  Further, when the gas flows into the first space S3A, the pressure of the first space S3A increases, and accordingly, the seal tape 46 that closes the third communication hole 45 provided in the partition wall member 40A is provided. Will be broken. Thereby, the gas after sprayed on the rod part 42 flows into the second space S3B in the gas discharge chamber S3 through the third communication hole 45.

  The gas flowing into the second space S3B flows along the axial direction of the housing and is blown onto the closing portion 12 of the housing body 10. At that time, the gas blown to the closed portion 12 is further cooled by contact with the inner surface of the closed portion 12 to remove heat and the slag contained in the gas is transferred to the inner surface of the closed portion 12. It is further removed to a considerable extent by adhering to the surface.

  The gas blown to the blocking portion 12 then reaches the filter 90 in a different direction and passes through the filter 90. When the gas passes through the filter 90, heat is further removed by the filter 90 to cool the gas, and slag contained in the gas is further removed by the filter 90.

  The gas after passing through the filter 90 is ejected to the outside of the housing through the gas ejection port 13 provided in the housing body 10. The jetted gas is introduced into an airbag provided adjacent to the cylinder type gas generator 1A, and the airbag is inflated and deployed.

  The cylinder type gas generator 1A in the present embodiment described above cools the gas in the first space S3A of the gas discharge chamber S3 located downstream of the gas passage chamber S2 along the gas flow direction. Therefore, since the solid rod portion 42 having a large heat capacity is provided, the gas cooling efficiency can be remarkably improved as compared with the case where the rod portion 42 is not provided.

  Further, by providing the columnar rod portion 42 in the first space S3A, the flow path in the gas discharge chamber S3 is not unnecessarily mazed, and the gas flow direction extends over about 180 degrees. Since there is no portion forcibly folded, the flow resistance against the gas in the gas discharge chamber S3 is not significantly increased.

  In addition, by adopting the above configuration, the structure of the portion of the gas discharge chamber S3 where the first space S3A is provided has a double tube structure in which a columnar rod portion 42 is disposed at the center. Will stay. Therefore, the cross-sectional area of the gas flow path in the part can be secured to a size close to the area obtained by dividing the cross-sectional area of the housing into approximately equal parts, and the flow path is restricted more than necessary. Can be avoided. As a result, even in this sense, a large flow resistance does not occur in the portion.

  Therefore, by adopting the above configuration, both the smooth gas discharge and the efficient gas cooling can be achieved, and a high-performance cylinder type gas generator can be obtained.

  Further, by adopting the above configuration, the flow path is not restricted more than necessary in the portion of the gas discharge chamber S3 where the first space S3A is provided, so that the internal pressure of the combustion chamber S1 during operation is more than necessary. Therefore, it is not necessary to provide the housing with high pressure resistance, and as a result, the weight can be reduced and the manufacturing cost can be reduced.

  Further, by adopting the above-described configuration, more slag can be collected by blowing gas onto the rod portion 42.

  Furthermore, by adopting the above configuration, it is possible to achieve both high cooling efficiency and smooth gas discharge with a very simple configuration in which the solid rod portion 42 is provided in the first space S3A. The device configuration is not complicated. In particular, as described above, the partition 41, the partition 43, and the rod 42 are integrated as a single partition member 40A, thereby facilitating the assembling operation and reducing the cost and the high cooling efficiency and smoothness. It is also possible to manufacture a gas generator that is compatible with the discharge of various gases.

  Here, the total opening area of the plurality of first communication holes 64 provided in the cylindrical part 61 of the partition member 60 is D1, and the plurality of second communication holes 65 provided in the cylindrical part 61 of the partition member 60 are The total opening area is D2, the total opening area D3 of the plurality of third communication holes 45 provided in the partition portion 43 of the partition wall member 40A, and the plurality of gas outlets 13 provided in the peripheral wall portion 11 of the housing body 10. When the total opening area is D4, among these total opening areas D1 to D4, the total opening area D3 of the plurality of third communication holes 45 is smaller than the other total opening areas D1, D2, and D4. It is preferable that it is comprised.

  In such a configuration, the partition portion 43 of the partition wall member 40A functions exclusively as a pressure partition wall in addition to the housing, and the internal pressure of the space inside the housing (especially when the cylinder type gas generator 1A is operated) The internal pressure of the combustion chamber S1) can be maintained at a considerably high pressure by the partition portion 43. Therefore, the continuous combustion of the gas generating agent 70 can be maintained, and unintended deformation of the partition member 60, the partition wall portion 41, the rod portion 42, the filter 90, and the like can be suppressed.

  In the cylinder type gas generator 1A according to the present embodiment, as described above, the gas cooling performance and the slag collecting function are remarkably provided by providing the solid rod portion 42 in the first space S3A. An increasing effect can be obtained. Therefore, depending on the degree of the effect, it is not necessary to install the filter 90 in the second space S3B, and the installation of the filter 90 can be abolished. In that case, the number of parts can be reduced, the assembly work can be further facilitated, and the weight of the cylinder type gas generator can be greatly reduced.

(Embodiment 2)
FIG. 7 is a schematic view of the vicinity of a gas outlet of the cylinder type gas generator in Embodiment 2 of the present invention. Hereinafter, with reference to this FIG. 7, the cylinder type gas generator 1B in this Embodiment is demonstrated.

  As shown in FIG. 7, the cylinder-type gas generator 1B in the present embodiment has an end portion on the closing portion 12 side of the partition member 60 when compared with the cylinder-type gas generator 1A in the first embodiment described above. The only difference is the shape.

  Specifically, in the cylinder type gas generator 1 </ b> B in the present embodiment, a skirt portion 63 is formed at the end of the tubular portion 61 of the partition member 60 on the partition member 40 </ b> A side. The skirt portion 63 is formed so as to spread from the other end side (that is, the closed portion 12 side) of the housing of the cylindrical portion 61 toward the radially outer side.

  When configured in this manner, the skirt portion 63 which is the end portion of the partition member 60 on the partition wall member 40A side is abutted so as to abut against the partition portion 43 of the partition wall member 40A, and a part thereof It arrange | positions so that it may contact | abut to the internal peripheral surface of the surrounding wall part 11 of the housing main body 10. FIG.

  By adopting the configuration described above, in addition to the effect described in the first embodiment described above, an effect of further stably fixing the partition member 60 to the housing body 10 can be obtained. Positioning of the partition member 60 at the time of assembly can be performed more easily.

(Embodiment 3)
FIG. 8 is a schematic view of the vicinity of the gas outlet of the cylinder type gas generator in the third embodiment of the present invention. Hereinafter, with reference to this FIG. 8, the cylinder type gas generator 1C in this Embodiment is demonstrated.

  As shown in FIG. 8, when the cylinder type gas generator 1C in the present embodiment is compared with the cylinder type gas generator 1A in the first embodiment, the partition wall member 40A shown in FIG. Instead, it is different only in that it is constituted by two parts divided into two parts.

  Specifically, in the cylinder type gas generator 1C in the present embodiment, the partition wall portion 41 and the rod portion 42 of the partition wall member 40A described above are shown in FIG. The partition member 40B is integrated and configured, and the partition portion 43 of the partition member 40A described above is configured by the partition member 50A shown in FIG. 8 which is a different part from the partition member 40B. .

  Here, on the outer edge portion of the partition wall portion 41 of the partition wall member 40B, a cylindrical standing wall portion 41a is provided standing up toward the combustion chamber S1. The standing wall 41a has an outer peripheral surface that is in contact with the inner peripheral surface of the partition member 60. This stabilizes the posture of the partition member 40B when assembled, and the combustion chamber S1 separated by the partition 41. The airtightness between the gas discharge chamber S3 and the first space S3A is enhanced.

  On the other hand, the partition member 50A includes a partition portion 53 that partitions the space inside the housing in the axial direction, an annular groove portion 54 for fixing the housing body 10 by caulking, a plurality of third communication holes 55, and a seal tape 56. Further, a locking recess 57 into which the tip of the rod portion 42 of the partition wall member 40B is inserted is provided on the main surface of the partition portion 53 on the second space S3B side. By inserting the tip of the rod portion 42 into the locking recess 57, the partition member 40B is assembled to the partition member 50A. These two members are the same as the partition member 40A in the first embodiment described above. The function of will be demonstrated.

  Even when the configuration described above is employed, the same effects as those described in the first embodiment can be obtained.

(Embodiment 4)
FIG. 9 is a schematic view of the vicinity of the gas outlet of the cylinder type gas generator in the fourth embodiment of the present invention. Hereinafter, with reference to this FIG. 9, cylinder type gas generator 1D in this Embodiment is demonstrated.

  As shown in FIG. 9, the cylinder type gas generator 1 </ b> D in the present embodiment is different from the cylinder type gas generator 1 </ b> A in the first embodiment described above in that the partition wall member 40 </ b> A shown in FIG. Instead, it is different only in that it is constituted by two parts divided into two parts.

  Specifically, in the cylinder type gas generator 1D in the present embodiment, the partition wall portion 41 of the partition wall member 40A described above is configured as a partition wall member 40C shown in FIG. In the partition member 40A described above, the rod part 42 and the partition part 43 are configured by a partition member 50B shown in FIG. 9 which is a different part from the partition member 40C.

  Here, on the outer edge portion of the partition wall portion 41 of the partition wall member 40 </ b> C, a cylindrical standing wall portion 41 a erected toward the combustion chamber S <b> 1 is provided. The standing wall 41a has an outer peripheral surface that is in contact with the inner peripheral surface of the partition member 60. This stabilizes the posture of the partition member 40B when assembled, and the combustion chamber S1 separated by the partition 41. The airtightness between the gas discharge chamber S3 and the first space S3A is enhanced.

  On the other hand, the partition member 50B includes a partition portion 53 that partitions the space inside the housing in the axial direction, a rod portion 52 that is erected from the partition portion 53 toward the second space S3B, and the housing body 10. An annular groove portion 54 for caulking and fixing, a plurality of third communication holes 55, and a seal tape 56 are provided. The partition member 40C described above is affixed to the tip of the rod portion 52 provided on the partition member 50B, and accordingly, the partition member 40C and the partition member 50B are separated from the partition member 40A in the first embodiment described above. A similar function will be exhibited.

  Even when the configuration described above is employed, the same effects as those described in the first embodiment can be obtained.

(Embodiment 5)
FIG. 10 is a schematic view of the vicinity of the gas outlet of the cylinder type gas generator in the fifth embodiment of the present invention. Hereinafter, with reference to this FIG. 10, the cylinder type gas generator 1E in this Embodiment is demonstrated.

  As shown in FIG. 10, the cylinder type gas generator 1E according to the present embodiment has a partition member 40D having a configuration different from that of the partition member 40A when compared with the cylinder type gas generator 1A according to the first embodiment. The configuration is mainly different between the point provided and the point not provided with the filter 90.

  Specifically, in the cylinder type gas generator 1E in the present embodiment, the partition wall member 40D includes a partition wall portion 41 that axially separates the space inside the cylindrical portion 61 of the partition member 60, and the partition wall. Only the rod portion 42 erected from the portion 41 toward the closed portion 12 side of the housing body 10, and the partition portion 43 provided in the partition member 40 </ b> A in 1 in the above-described embodiment. Not. Therefore, in the cylinder type gas generator 1E, the gas discharge chamber S3 is not partitioned into two spaces, and is configured only by a single space.

  Here, on the outer edge portion of the partition wall portion 41 of the partition wall member 40D, a cylindrical standing wall portion 41a is provided standing up toward the combustion chamber S1. The standing wall 41a has an outer peripheral surface in contact with the inner peripheral surface of the partition member 60. This stabilizes the posture of the partition member 40D when assembled, and the combustion chamber S1 separated by the partition 41. The airtightness between the gas discharge chamber S3 is improved.

  Further, the rod portion 42 of the partition member 40D is in contact with the inner surface of the closing portion 12 of the housing main body 10 which is the other end portion of the housing. Thereby, the partition member 40 </ b> D is fixed to the housing body 10 and the partition member 60.

  A skirt portion 63 is formed at the end of the cylindrical portion 61 of the partition member 60 on the closing portion 12 side. The skirt portion 63 is formed so as to spread from the other end side (that is, the closed portion 12 side) of the housing of the cylindrical portion 61 toward the radially outer side.

  When configured in this manner, the skirt portion 63 which is the end portion of the partition member 60 on the closed portion 12 side is abutted against the caulking portion 15 provided in the housing body 10, and a part thereof is the housing. It arrange | positions so that it may contact | abut to the internal peripheral surface of the surrounding wall part 11 of the main body 10. FIG.

  Further, the gas discharge chamber S3 is not provided with a member such as the filter 90 in the first embodiment described above. On the other hand, a seal tape 16 is affixed to the inner peripheral surface of the portion of the peripheral wall portion 11 of the housing main body 10 that defines the gas discharge chamber S3 where the plurality of gas ejection ports 13 are provided. The seal tape 16 is for closing a plurality of gas ejection ports 13 provided in the housing body 10. As the seal tape 16, an aluminum foil having an adhesive member applied on one side is used. . Thereby, the airtightness of the combustion chamber S1, the gas passage chamber S2, and the gas discharge chamber S3 is ensured when the cylinder type gas generator 1E is not in operation.

  In the configuration of the present embodiment described above, the gas cooling performance and the slag collecting function are remarkably enhanced by providing the rod portion 42 in the gas discharge chamber S3 as described above. As a result, the filter as described above The configuration in the case where it is not necessary to install 90 in the gas discharge chamber S3 is illustrated. Therefore, by configuring in this way, in addition to the effects in the first embodiment described above, effects such as reduction in the number of parts and further ease of assembly work can be obtained, and the cylinder type gas generator An effect of greatly reducing the weight can also be obtained.

  Here, the total opening area D1 of the plurality of first communication holes 64, the total opening area D2 of the plurality of second communication holes 65, and the total opening area D4 of the plurality of gas ejection ports 13 are the total opening area. Of D1, D2 and D4, the total opening area D4 of the plurality of gas ejection ports 13 is preferably configured to be smaller than the other total opening areas D1 and D2.

  When configured in this way, the entire housing functions as a pressure vessel, and the internal pressure of the space inside the housing (particularly the internal pressure of the combustion chamber S1) during operation of the cylinder type gas generator 1E is used as the housing. Makes it possible to maintain a considerably high pressure. Therefore, continuous combustion of the gas generating agent 70 can be maintained, and unintended deformation of the partition member 60, the partition member 40D, and the like can be suppressed.

(Embodiment 6)
FIG. 11 is a schematic view of the vicinity of a gas outlet of a cylinder type gas generator in Embodiment 6 of the present invention. Hereinafter, with reference to this FIG. 11, the cylinder type gas generator 1F in this Embodiment is demonstrated.

  As shown in FIG. 11, the cylinder type gas generator 1F in the present embodiment has a rod portion 42 arranged in the gas discharge chamber S3 when compared with the cylinder type gas generator 1E in the fifth embodiment described above. The only difference is that the wound body 48 of the metal wire is extrapolated.

  Specifically, for example, a coil spring as shown in the figure can be used as the wound body 48 of the metal wire, and the coil spring extends along the axial direction of the closing portion 12 of the housing body 10 and the partition portion of the partition member 40D. 41, and can be assembled to the housing by being sandwiched between the closed portion 12 and the partition wall portion 41 so as to be in a lightly compressed state.

  In the case of such a configuration, a kind of relatively lightweight metal wire wound body 48 as described above is used without using a relatively heavy member such as the filter 90 in the first embodiment. A function like a filter can be exhibited, and by arranging the winding body 48, the performance of gas cooling and the function of collecting slag can be enhanced.

  Therefore, by adopting the configuration described above, in addition to the effects in the first embodiment described above, effects such as ease of assembly work and significant weight reduction of the cylinder type gas generator can be obtained. .

  The metal wire wound body 48 is not limited to the above-described coil spring, and may be configured by simply winding one or more metal wires around the rod portion 42, or other configurations. May be used.

  In the above-described first to sixth embodiments of the present invention, the case where the combustion chamber is configured to include the space located on the holder side with respect to the partition member is illustrated, but it is not always necessary to configure in this way. . That is, the holder may be fixed in a state of being inserted into the partition member. In this case, the combustion chamber is a space on the above-described one end side (that is, the holder side) of the housing with respect to the partition wall. And it is comprised only by the space inside radial direction rather than the cylindrical part of a division member.

  Further, in the above-described first to sixth embodiments of the present invention, the case where only the igniting agent or the igniting agent and the transfer charge is loaded in the ignition portion of the igniter has been described as an example. When loading, it is not always necessary that it is loaded in the igniter of the igniter, and it is loaded at a position between the igniter of the igniter and the gas generating agent using, for example, a cup-shaped member or container. May be.

  In the above-described first to sixth embodiments of the present invention, the housing body and the holder are provided, and when the partition portion is provided, the housing body and the partition portion are additionally fixed by caulking and fixing. Although the case where they are connected has been described as an example, it is naturally possible to use welding or the like for fixing the housing main body to the holder and / or the partition portion.

  In addition, in the first to sixth 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 target is not limited to this, but is the same as a cylinder type gas generator or a cylinder type gas generator incorporated in a passenger seat airbag device, curtain airbag device, knee airbag device, seat cushion airbag device, etc. The present invention can also be applied to a so-called T-shaped gas generator having a long outer shape.

  Furthermore, the characteristic configurations shown in the first to sixth embodiments of the present invention described above can naturally be combined with each other as long as they are allowed in the apparatus configuration. For example, a wound body as shown in the above-described sixth embodiment of the present invention may be extrapolated to the rod portion shown in the above-described first to fourth embodiments of the present invention, or the above-described book. In the configuration shown in the first to fourth embodiments of the invention, the filter may be eliminated as in the fifth embodiment of the present invention described above, and in that case, as in the fifth embodiment of the present invention described above. It is good also as leaving this without abolishing even a partition part.

  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.

  DESCRIPTION OF SYMBOLS 1A-1F Cylinder type gas generator, 10 Housing main body, 11 Perimeter wall part, 12 Closure part, 13 Gas ejection port, 14, 15 Caulking part, 16 Seal tape, 20 Holder, 21 Through part, 22 Caulking part, 23, 24 Annular groove part, 25 depression part, 26, 27 Seal member, 30 igniter, 31 ignition part, 32 terminal pin, 40A to 40D partition member, 41 partition part, 41a standing wall part, 42 rod part, 43 partition part, 44 annular groove part , 45 Third communication hole, 46 Seal tape, 47 Seal member, 48 Winding body, 50A, 50B Partition member, 52 Rod part, 53 Partition part, 54 Annular groove part, 55 Third communication hole, 56 Seal tape, 57 Stop recess, 60 partition member, 61 cylindrical portion, 62, 63 skirt portion, 64 first communication hole, 65 second communication hole, 70 Scan generator, 80 cushion member 81 spring portion 82 pressing portion 90 filters, S1 combustion chamber, S2 gas passage chamber, S3 gas discharge chamber, S3A first space, S3B second space.

Claims (11)

A combustion chamber in which a gas generating agent is disposed, a gas discharge chamber that discharges the gas generated in the combustion chamber toward the outside, and a gas passage chamber that connects the combustion chamber and the gas discharge chamber, A long cylindrical housing in which one end and the other end in the axial direction are closed;
An igniter assembled to the one end of the housing to face the combustion chamber;
A partition member and a partition member which are located inside the housing and divide the space inside the housing into the combustion chamber, the gas discharge chamber and the gas passage chamber;
The partition member has a cylindrical portion that divides a space inside the housing in a radial direction by being arranged so that an axial direction thereof is substantially parallel to an axial direction of the housing.
The partition member has a partition part that is disposed inside the cylindrical part, thereby partitioning the space inside the cylindrical part in the axial direction,
The combustion chamber includes a space closer to the one end portion of the housing than the partition wall portion and inside the tubular portion,
The gas passage chamber includes a space outside the cylindrical portion,
The gas discharge chamber is a space closer to the other end portion of the housing than the partition portion, and a space inside the tubular portion, and a space closer to the other end portion of the housing than the partition member. Including
A portion of the cylindrical portion that partitions the combustion chamber and the gas passage chamber is provided with a first communication hole for communicating the combustion chamber and the gas passage chamber.
A portion of the cylindrical portion that divides the gas passage chamber and the gas discharge chamber is provided with a second communication hole for communicating the gas passage chamber and the gas discharge chamber.
The housing defining the gas discharge chamber is provided with a gas jet for ejecting gas toward the outside of the housing,
A solid rod portion extending along the axial direction of the cylindrical portion so as to face the second communication hole is formed in a portion corresponding to the space inside the cylindrical portion of the gas discharge chamber. A gas generator is provided. A first space located on the one end side of the housing by being arranged closer to the other end portion of the housing than the partition member and partitioning the space inside the housing in the axial direction. And a partition part for partitioning into a second space located on the other end side of the housing,
The gas ejection port is provided in the housing of a portion that defines the second space,
A third communication hole for communicating the first space and the second space is provided in the partition;
The gas generator according to claim 1, wherein the rod portion is located only in the first space.   3. The total opening area of the third communication hole is the smallest among the total opening areas of each of the first communication hole, the second communication hole, the third communication hole, and the gas ejection port. Gas generator.   The gas generator according to claim 2 or 3, wherein the rod portion is erected from the partition wall portion and / or the partition portion.   Since the rod part and the partition part are configured by a part of the partition member, the rod part, the partition part, and the partition part are configured by an integrated single component. The gas generator according to claim 2 or 3.   The gas generator according to any one of claims 2 to 5, wherein a filter through which gas generated in the combustion chamber passes is disposed in the second space.   The gas generator according to claim 1, wherein the rod portion is erected from the partition wall portion.   The gas according to claim 7, wherein the rod part and the partition part are configured as a single integrated part by configuring the rod part as a part of the partition member. Generator.   The gas generator according to claim 7 or 8, wherein the rod portion is in contact with the other end portion of the housing. The partition member has an axial end located on the one end side of the housing and / or an axial end located on the other end side of the housing. Have
The gas generator according to any one of claims 1 to 9, wherein the skirt portion is in contact with a peripheral wall portion of the housing.   The gas generator according to any one of claims 1 to 10, wherein a wound body of a metal wire is extrapolated to the rod portion.

Images