JP5438641B2 - Inflator and vehicle airbag apparatus - Google Patents

Description

  The present invention relates to an inflator and a vehicle airbag device, and more particularly to a disc-type and filterless inflator and a vehicle airbag device including the inflator.

A flow path forming member for forming a gas flow path that is L-shaped in a longitudinal sectional view is disposed concentrically on the outer periphery of the combustion chamber filled with the gas generating agent, and the gas flow direction is changed. A filterless inflator is disclosed in which the combustion residue is removed by adhering to the wall surface every time the combustion residue is filtered (see Patent Document 1 and Patent Document 2).
Utility Model Registration No. 3122258 Utility Model Registration No. 3122259

  However, when the filter for filtration is abolished as in the conventional example described above, the inflator case is directly heated by the high-temperature gas. Therefore, the gas temperature can be reduced more than the inflator provided with the filter. is necessary.

  In view of the above facts, an object of the present invention is to eliminate the filter for filtration in the inflator so as to reduce the size and weight of the inflator and to improve the cooling performance of the gas temperature during operation.

The invention (inflator) of claim 1 is composed of a bottomed cylindrical upper case and a bottomed cylindrical lower case that closes the opening of the end of the upper case, and a plurality of peripheral walls on the upper case side. An inflator case in which a gas ejection hole is formed; an inner cylinder member that is disposed inside the inflator case and that stores and holds a charge; and an inner cylinder member that is disposed inside the inner cylinder member and ignites the charge In the inside of the inflator case, one end is disposed and closed on one side in the axial direction of the inflator case, and the other end is disposed on the other side in the axial direction of the inflator case. Between the outer cylinder member and the inner cylinder member, and an outer cylinder member that houses and holds a gas generating agent that generates gas by burning through the combustion of the inner cylinder member A combustion chamber that is provided on the one end side of the outer cylinder member and accommodates the gas generating agent; and a cooling space that is positioned on the other end side of the outer cylinder member; and the combustion A plurality of communication holes that allow the flow of the gas from the chamber side to the cooling space side are provided , and an inner annular wall portion that is fitted to the outer surface of the peripheral wall portion of the inner cylinder member is formed on the inner peripheral edge. A partition wall formed on the outer periphery with an outer annular wall portion that fits into the inner surface of the outer cylinder member, and the other of the outer cylinder member inside the inflator case and outside the outer cylinder member. A gas flow path that communicates with the cooling space on the end side and communicates with the gas ejection hole of the upper case is formed, and the gas generated in the combustion chamber passes through the communication hole of the partition wall. Flowing into the cooling space and facing the cooling space. By directly contacting the bottom wall portion of the data case and then flowing into the gas flow path, a filter for cooling and filtering the gas is not used. Further, of the upper case and the lower case A flange on the side having the bottom wall portion facing the cooling space is integrally provided with a flange for attachment to a predetermined portion, and the other end of the outer cylinder member and the bottom wall of the inner cylinder member And the end portions of the inner annular wall portion and the outer annular wall portion of the partition wall are in contact with the bottom wall portion of the inflator case facing the cooling space .

  In the inflator according to claim 1, when the ignition device is actuated to ignite the transfer charge in the inner cylinder member, and the combustion of the transfer charge propagates into the combustion chamber of the outer cylinder member, it is stored and held in the combustion chamber. The gas generating agent is burned and high temperature and high pressure gas is generated. This gas enters the cooling space through the communication hole formed in the partition wall, hits the bottom wall portion of the inflator case and then flows into the gas flow path, and the gas ejection hole formed in the peripheral wall portion on the upper case side From outside the inflator.

  At this time, of the upper case and the lower case, the case having the bottom wall portion facing the cooling space, that is, the case directly contacting the high-temperature gas in the cooling space, is subjected to heat exchange. There is a tendency for more heat to accumulate. In the inflator according to claim 1, since the flange for mounting to the predetermined part is integrally provided in the case, heat can be efficiently released from the flange to the predetermined part. The cooling performance of temperature can be improved.

  Mist contained in the gas generated in the combustion chamber adheres to the bottom wall of the inflator case and the inner surface of the peripheral wall due to the flow resistance when passing through the cooling space and the gas flow path. It is efficiently removed before reaching the hole. Thereby, the conventional filter for cooling and filtration is abolished, and the inflator can be reduced in size and weight.

  According to a second aspect of the present invention, in the inflator according to the first aspect, a ventilation portion that communicates with the combustion chamber and an inner side of the inner cylinder member at an end portion on the combustion chamber side in the axial direction of the inner cylinder member. Is provided.

  In the inflator according to claim 2, the combustion of the charge transfer agent in the inner cylinder member is propagated to the gas generating agent in the combustion chamber through the ventilation portion of the inner cylinder member. The ventilation portion is provided at an end portion on the combustion chamber side in the axial direction of the inner cylinder member, and the cooling space is partitioned by a partition wall and is positioned on the opposite side of the combustion chamber in the axial direction of the inflator case. Therefore, the gas generating agent in the combustion chamber can be burned efficiently.

  According to a third aspect of the present invention, in the inflator according to the first or second aspect, the outer cylinder member is fitted inside the lower case, and the lower case has an opening-side end portion of the peripheral wall of the upper case. And is fixed to the upper case in a state of being fitted inside the portion, and a step portion is formed by the opening side end portion of the lower case and the peripheral wall portion of the upper case, and the gas flow path Part, the outer cylinder member, and the peripheral wall portion of the upper case.

  In the inflator according to claim 3, in the axial direction of the inflator case, the range of the gas flow path extends to the step portion between the opening side end portion of the lower case and the peripheral wall portion of the upper case. The gas that has flowed into the gas flow path quickly reaches the gas ejection hole. For this reason, the quickness of the ejection of the gas from the gas ejection hole during the operation of the inflator can be ensured.

  According to a fourth aspect of the present invention, in the inflator according to any one of the first to third aspects, at least a portion of the flange that comes into contact with the predetermined portion has a stepped shape.

  In the inflator according to claim 4, since the flange has a stepped shape, it is possible to increase the contact area with a predetermined portion serving as a mounting location. For this reason, at the time of the operation of the inflator, the heat can be efficiently released from the flange to the predetermined portion, and the cooling performance of the gas temperature can be further improved.

The invention of claim 5 comprises a bottomed cylindrical upper case and a bottomed cylindrical lower case that closes an opening at an end of the upper case, and a plurality of gas ejection holes in the peripheral wall portion on the upper case side Formed in the inflator case, an inner cylinder member that accommodates and holds the transfer charge, and an ignition that is provided in the inner cylinder member and ignites the transfer charge In the apparatus and the inflator case, one end is disposed and closed on one side in the axial direction of the inflator case, the other end is disposed on the other side in the axial direction of the inflator case, and combustion of the transfer charge is performed. A gas generating agent that burns and generates gas by propagating is provided between an outer cylinder member that houses and holds around the inner cylinder member, and the outer cylinder member and the inner cylinder member. A combustion chamber located on the one end side of the member and containing the gas generating agent is partitioned from a cooling space located on the other end side of the outer cylindrical member, and the cooling chamber is separated from the combustion chamber side. A partition wall provided with a plurality of communication holes allowing the flow of the gas to the space side, and the other end of the outer cylinder member inside the inflator case and outside the outer cylinder member A gas flow path communicating with the cooling space on the side and communicating with the gas ejection hole of the upper case is formed, and the gas generated in the combustion chamber passes through the communication hole of the partition wall to form the cooling A filter for cooling and filtering the gas by flowing into the gas space and directly contacting the bottom wall of the inflator case facing the cooling space and then flowing into the gas flow path The configuration is not used, and the previous Of the upper case and the lower case, on the side of the case having the bottom wall portion facing the space for the cooling flange for attachment to a given site is provided integrally with the flange, the space for the cooling A heat transfer member is provided in contact with the outer surface of the inflator case facing the surface.

  In the inflator according to claim 5, since the heat transfer member is in contact with the flange and the outer surface of the inflator case facing the cooling space, the heat stored in the inflator case during operation is In addition to being transmitted to the flange through the case itself, it is transmitted from the outer surface of the inflator case to the flange via a heat transfer member. That is, heat can be transferred in two systems to the flange of the inflator case.

  According to a sixth aspect of the present invention (vehicle airbag apparatus), the inflator according to any one of the first to fifth aspects is attached to the module case, and the supply of gas from the inflator is received. An airbag module configured by storing an airbag to be inflated and deployed in a folded state, the airbag module being in a state in which the flange of the inflator is in direct contact with the module case as the predetermined portion And fixed to the vehicle.

  In the vehicle airbag device according to claim 6, since the airbag module is attached and fixed to the vehicle in a state where the flange of the inflator is in direct contact with the module case as a predetermined portion, the inflator is operated when the inflator is operated. While releasing heat directly from the case to the module case and releasing heat from the module case to a predetermined portion, the cooling performance of the gas temperature can be improved.

  According to a seventh aspect of the present invention, in the vehicle airbag device according to the sixth aspect, the flange of the inflator is directly or relative to a mounting bracket provided in an instrument panel reinforcement in the vehicle. Bolts are fastened through the case.

  In the vehicle airbag device according to claim 7, since the flange of the inflator is bolted directly to the mounting bracket of the instrument panel reinforcement or via the module case, the inflator is activated during operation of the inflator. Heat can be released directly from the case to the mounting bracket or indirectly through the module case, and further, heat can be released from the mounting bracket or module case to the instrument panel reinforcement. For this reason, the cooling performance of the gas temperature during operation can be further improved.

  According to an eighth aspect of the present invention (vehicle airbag device), the inflator according to any one of the first to fifth aspects is attached to the base member, and the supply of gas from the inflator is received. The airbag module is configured by attaching an airbag to be inflated and deployed in a folded state, and the airbag module is in a state in which the flange of the inflator is in direct contact with the base member as the predetermined portion. And fixed to the vehicle.

  In the vehicle airbag device according to claim 8, since the airbag module is attached and fixed to the vehicle in a state where the flange of the inflator is in direct contact with a base member as a predetermined portion, the inflator is operated when the inflator is operated. The heat can be directly released from the case to the base member, and the heat can be released from the base member to a predetermined portion, so that the cooling performance of the gas temperature can be improved.

  According to a ninth aspect of the present invention, in the vehicle airbag device according to the eighth aspect, the base member is bolted to a steering wheel in the vehicle.

  In the vehicle airbag device according to claim 9, since the base member that is in direct contact with the flange of the inflator is bolted to the steering wheel, heat is applied from the inflator case to the base member during operation of the inflator. In addition, heat can be released from the base member to the steering wheel. For this reason, the cooling performance of the gas temperature during operation can be further improved.

  As described above, according to the inflator of the first aspect of the present invention, the filter for filtering in the inflator can be eliminated to reduce the size and weight of the inflator and to cool the gas temperature during operation. An excellent effect that the performance can be improved is obtained.

  According to the inflator of the second aspect, it is possible to obtain an excellent effect that the gas generating agent in the combustion chamber can be efficiently burned.

  According to the inflator of the third aspect, it is possible to obtain an excellent effect that the speed of gas ejection from the gas ejection holes during operation of the inflator can be ensured.

  According to the inflator of the fourth aspect, when the inflator is operated, an excellent effect is obtained that heat can be more efficiently released from the flange to the predetermined portion, and the cooling performance of the gas temperature can be further improved. It is done.

  According to the inflator of the fifth aspect, it is possible to obtain an excellent effect that heat can be transmitted in two systems to the flange of the inflator case.

  According to the vehicle airbag device of the sixth aspect, heat is directly released from the inflator case to the module case, and heat is released from the module case to a predetermined portion, thereby improving the gas temperature cooling performance. The excellent effect that it can be made is obtained.

  According to the vehicle airbag device of the seventh and ninth aspects, it is possible to obtain an excellent effect that the gas temperature cooling performance when the inflator is activated can be further improved.

  According to the vehicle airbag device of the eighth aspect, it is possible to obtain an excellent effect that the cooling performance of the gas temperature when the inflator is activated can be improved.

FIGS. 1 to 4 relate to the first embodiment, and FIG. 1 is a cross-sectional view mainly showing a state in which the airbag module is attached to a mounting bracket. It is a perspective view which shows the principal part of an inner cylinder member. It is a perspective view which shows a partition. It is principal part sectional drawing which shows the flow of the gas at the time of the action | operation of an inflator, and the spreading | diffusion of the heat | fever from an inflator case to a module case and a mounting bracket. It is principal part sectional drawing which shows the internal structure of the inflator which concerns on 2nd Embodiment. It is principal part sectional drawing which shows the attachment state of the inflator which concerns on 3rd Embodiment, and a base member. It is a disassembled perspective view which shows the airbag apparatus for vehicles which concerns on 4th Embodiment. 8 and 9 relate to the fifth embodiment, and FIG. 8 is an exploded perspective view showing a vehicle airbag device in which the module case is made of cloth. It is an expanded sectional view showing a module case, an inflator, and a nut concerning a modification which made a module case metal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
1 to 4, an inflator 10 according to the present embodiment is a gas generation source for supplying an inflation gas to an airbag or the like (not shown), and includes an inflator case 12 and an inner cylinder member 14. And an ignition device 16, an outer cylinder member 18, and a partition wall 22.

  The inflator case 12 includes a bottomed cylindrical upper case 26 and a bottomed cylindrical lower case 28 that closes an opening at a lower end (end portion) of the upper case 26. The inflator case 12 includes a peripheral wall portion 26B on the upper case 26 side. A plurality of gas ejection holes 26C are formed. The gas ejection hole 26C of the upper case 26 is closed from the inside with, for example, an aluminum tape (not shown) for moisture prevention.

  The upper case 26 and the lower case 28 are each made of metal, and are fixed to each other by welding, for example. The outer diameter of the peripheral wall portion 28B of the lower case 28 is equal to the inner diameter of the peripheral wall portion 26B of the upper case 26, and a part of the peripheral wall portion 28B of the lower case 28 is inserted inside the peripheral wall portion 26B of the upper case 26. It is in a fitted state. As a result, a step portion 32 is formed at the upper end position of the peripheral wall portion 28 </ b> B in the lower case 28.

  The upper case 26 is a case having a bottom wall portion 26D facing a cooling space 44 described later. At the lower end of the peripheral wall portion 26B of the upper case 26, a flange 26F (hereinafter referred to as “mounting flange 26F”) for mounting to the module case 52 and the mounting bracket 54 as an example of a predetermined portion protrudes radially outward. It is provided integrally. For example, four through holes 26G (see FIG. 7) through which stud bolts 56 and the like are passed when the inflator 10 is attached to the module case 52 and the attachment bracket 54 are formed in the attachment flange 26F.

  A cylindrical portion 28A that protrudes toward the upper case 26 is integrally formed at the center of the lower case 28, for example. An inward flange 28C facing inward in the radial direction is formed at, for example, the upper end of the cylindrical portion 28A. The cylindrical portion 28 </ b> A and the flange 28 </ b> C serve as a mounting portion for the ignition device 16.

  The inner cylinder member 14 is a bottomed cylindrical member that is disposed inside the inflator case 12 and accommodates and holds the transfer charge 15. An inner diameter of the peripheral wall portion 14B of the inner cylindrical member 14 is set slightly smaller than an outer diameter of the cylindrical portion 28A of the lower case 28, and the inner cylindrical member 14 is press-fitted in a state of being covered with the cylindrical portion 28A. ing. The bottom wall portion 14D of the inner cylindrical member 14 is in contact with or close to the bottom wall portion 26D of the upper case 26. The method of fixing the inner cylinder member 14 to the lower case 28 is not limited to press-fitting to the cylindrical portion 28A, and may be by caulking or the like.

  As shown in FIGS. 1 and 2, an annular enlarged portion 14 </ b> A having an outer diameter and an inner diameter larger than those of the peripheral wall portion 14 </ b> B is provided at an end portion of the inner casing member 14 on the bottom wall portion 28 </ b> D side of the lower case 28. For example, it is formed over the entire circumference. For example, rectangular notches 14C are formed at a plurality of positions in the circumferential direction of the annular enlarged diameter portion 14A. The cutout portion 14 </ b> C and the bottom wall portion 28 </ b> D of the lower case 28 form a ventilation portion 34 that communicates solely with the inside and outside of the inner cylinder member 14.

  In the inner cylinder member 14, at least a portion surrounding the cylindrical portion 28 </ b> A of the lower case 28, a groove-shaped enlarged portion extending along the axial direction of the inner cylinder member 14 and having a larger outer diameter and inner diameter than the peripheral wall portion 14 </ b> B. 14E is formed. The lower end of the groove-shaped enlarged diameter portion 14E is connected to the annular enlarged diameter portion 14A. Further, the groove-shaped enlarged diameter portion 14E is formed at a plurality of positions in the circumferential direction of the inner cylinder member 14 at angular positions avoiding the notches 14C of the annular enlarged diameter portion 14A. As a result, the combustion of the explosive 15 in the inner cylinder member 14 propagates along the inner side of the groove-shaped enlarged portion 14E to the annular enlarged portion 14A located on the bottom wall portion 28D side of the lower case 28, and further It spreads in the outer cylinder member 18 through the ventilation portion 34 while spreading in the circumferential direction along the annular enlarged diameter portion 14A.

  In FIG. 1, an ignition device 16 is a device that is disposed inside the inner cylindrical member 14 and ignites the transfer charge 15. For example, the ignition device 16 is attached to a lower case 28 through a synthetic resin 36 (cylindrical portion). 28A and flange 28C). The terminal 16A of the ignition device 16 penetrates the synthetic resin 36 and is exposed to the inside of the cylindrical portion 28A of the lower case 28, and a wire harness (not shown) is connected to the terminal 16A. This wire harness is connected to an ECU (not shown) so that an ignition current flows to the ignition device 16 in a predetermined case.

  In the inflator case 12, one end 18 </ b> A is disposed on the bottom wall portion 28 </ b> D side (one side in the axial direction of the inflator case 12) of the lower case 28 and the other end 18 </ b> B is closed on the outer case member 18. It is arranged on the bottom wall portion 26D side (the other side in the axial direction of the inflator case 12). The outer cylinder member 18 accommodates and holds in the combustion chamber 42 around the inner cylinder member 14 a gas generating agent 38 that burns and generates gas as the combustion of the transfer charge 15 propagates.

  The outer cylinder member 18 is fitted inside the peripheral wall portion 28 </ b> B in the lower case 28. One end 18 </ b> A of the outer cylinder member 18 has an inward flange shape, and is in contact with the bottom wall portion 28 </ b> D of the lower case 28 in a fitted state with the lower case 28. That is, the one end 18 </ b> A of the outer cylinder member 18 is closed by the bottom wall portion 28 </ b> D of the lower case 28. The other end 18B of the outer cylinder member 18 is in contact with or close to the bottom wall portion 26D of the upper case 26, and, for example, rectangular notches 18C are formed at a plurality of locations in the circumferential direction of the other end 18B. ing.

  1 and 3, the partition wall 22 is provided between the outer cylinder member 18 and the inner cylinder member 14 by, for example, press-fitting, and is located on the one end 18 </ b> A side of the outer cylinder member 18 and accommodates a gas generating agent 38. And a cooling space 44 located on the other end 18B side of the outer cylindrical member 18 is partitioned. The partition wall 22 is provided with a plurality of communication holes 22A that allow gas flow from the combustion chamber 42 side to the cooling space 44 side.

  An inner annular wall portion 22 </ b> D that fits to the outer surface of the peripheral wall portion 14 </ b> B of the inner cylinder member 14 is formed on the inner peripheral edge of the partition wall 22. An outer annular wall portion 22 </ b> E that fits with the inner surface of the outer cylinder member 18 is formed on the outer peripheral edge of the partition wall 22. A notch 22C corresponding to the notch 18C of the outer cylindrical member 18 is formed at the end 22B of the outer annular wall 22E. In FIG. 1, the cutout portions 18C and 22C have the same angular position and size in the circumferential direction, and the cutout portions 18C and 22C and the bottom wall portion 26D of the upper case 26 form an outer cylinder member. A ventilation portion 46 is formed in communication with the inside and outside of the 18.

  A gas flow path 48 communicating with the gas ejection hole 26 </ b> C of the upper case 26 is formed inside the peripheral wall portion 26 </ b> B of the upper case 26 and outside the outer cylinder member 18. In the present embodiment, the step portion 32 is formed at the position of the upper end of the lower case 28 that is inserted inside the peripheral wall portion 26 </ b> B of the upper case 26. Therefore, the gas flow path 48 is formed in an annular shape between the peripheral wall portion 26 </ b> B of the upper case 26, the outer cylindrical member 18, and the stepped portion 32. Further, the gas flow path 48 communicates with the cooling space 44 at, for example, the ventilation portion 46 on the other end 18 </ b> B side of the outer cylinder member 18.

  In the inflator 10 according to the present embodiment, the gas generated in the combustion chamber 42 flows into the cooling space 44 through the communication hole 22 </ b> A of the partition wall 22, and the bottom of the upper case 26 facing the cooling space 44. By directly contacting the wall 26D and then flowing into the gas flow path 48 through the vent 46, a filter (not shown) for cooling and filtering the gas is not used.

  The transfer agent 15 and the gas generating agent 38 are not necessarily different from each other, and the gas generating agent 38 can be used as the transfer agent 15.

  As shown in FIG. 1, an airbag module 60 having an inflator 10 has an inflator 10 attached to a module case 52, and an airbag 62 that is inflated and deployed upon supply of gas from the inflator 10 is folded. Contained in a state. The airbag module 60 is mounted and fixed to a mounting bracket 54 of the vehicle with the mounting flange 26F of the inflator 10 in direct contact with the module case 52.

  As an example, an airbag 62 and a retainer 64 are arranged on the upper surface side of the bottom wall portion 52 </ b> A of the module case 52. The gas ejection hole 26 </ b> C of the inflator 10 is located inside the airbag 62. A mounting flange 26 </ b> F is disposed on the lower surface side of the bottom wall portion 52 </ b> A of the module case 52. The mounting flange 26F is sandwiched between, for example, the module case 52 and the mounting bracket 54, and is in direct contact with not only the module case 52 but also the mounting bracket 54.

  The mounting flange 26F of the inflator 10 may be disposed on the upper surface side of the bottom wall portion 52A of the module case 52. In this case, the mounting flange 26F is in direct contact with the module case 52 but is not in direct contact with the mounting bracket 54.

  A stud bolt 56 extends downward from the retainer 64, and the stud bolt 56 passes through the airbag 62, the module case 52, the mounting flange 26 </ b> F of the inflator case 12, and the mounting bracket 54. A nut 58 is fastened to the stud bolt 56 from the lower side of the mounting bracket 54. Thereby, the airbag module 60 is attached and fixed to the mounting bracket 54 of the vehicle.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 4, in the inflator 10 according to the present embodiment, the ignition charge 16 in the inner cylinder member 14 is ignited by operating the ignition device 16 when receiving an operating current from the ECU. When the combustion of the charge 15 is propagated in the direction of the arrow A into the combustion chamber 42 of the outer cylinder member 18 through the ventilation portion 34 provided at the end of the inner casing member 14 on the bottom wall portion 28D side of the lower case 28. The gas generating agent 38 accommodated and held in the combustion chamber 42 burns, and high-temperature and high-pressure gas is generated.

  This gas passes through the communication hole 22A formed in the partition wall 22 and enters the cooling space 44 (in the direction of arrow B), hits the bottom wall portion 26D of the upper case 26, and then passes through the ventilation portion 46 to pass through the gas flow path 48. To the outside of the inflator 10 (in the direction of arrow C) from a gas ejection hole 26C formed in the peripheral wall portion 26B on the upper case 26 side.

  Here, in the present embodiment, in the axial direction of the inflator case 12, the range of the gas flow path 48 extends to the step portion 32 between the opening side end portion of the lower case 28 and the peripheral wall portion 26 </ b> B of the upper case 26. The gas flowing into the gas flow path 48 from the cooling space 44 quickly reaches the gas ejection hole 26C. For this reason, the rapidity of the ejection of the gas from the gas ejection hole 26C when the inflator 10 is operated can be ensured.

  Further, the ventilation portion 34 for propagating the combustion of the transfer powder 15 to the gas generating agent 38 and the communication hole 22A for flowing the generated gas to the cooling space 44 are opposite to each other in the axial direction of the inflator case 12. Therefore, the gas generating agent 38 can be combusted efficiently.

  Here, of the upper case 26 and the lower case 28, the side having the bottom wall portion 26 </ b> D facing the cooling space 44, i.e., the side that directly contacts the high temperature gas in the cooling space 44, The heat exchange tends to accumulate more heat. In that respect, in the inflator 10 according to the present embodiment, the upper case 26 is integrally provided with a mounting flange 26F for the module case 52 and the vehicle mounting bracket 54, and therefore, as shown by a thick arrow in FIG. The heat can be efficiently released from the mounting flange 26F to the module case 52 and the mounting bracket 54.

  Specifically, the combustion heat of the transfer charge 15 is transmitted to the bottom wall portion 26D of the upper case 26 through the bottom wall portion 14D of the inner cylinder member 14, and the heat of the gas is transmitted in the cooling space 44. It is transmitted. When the other end 18 </ b> B of the outer cylinder member 18 and the end 22 </ b> B of the partition wall 22 are in contact with the bottom wall part 26 </ b> D of the upper case 26, heat is transmitted from the outer cylinder member 18 or the partition wall 22 to the upper case 26. . Thus, the heat transmitted to the bottom wall portion 26D of the upper case 26 reaches the mounting flange 26F through the peripheral wall portion 26B, and is transmitted to the module case 52 and the mounting bracket 54 that are in direct contact with the mounting flange 26F. .

  Further, since the bottom wall portion 28D of the lower case 28 faces the combustion chamber 42, the heat of the high-temperature gas generated in the combustion chamber 42 is also transmitted to the bottom wall portion 28D. The heat transmitted to the bottom wall portion 28D of the lower case 28 is transmitted from the peripheral wall portion 28B of the lower case 28 to the peripheral wall portion 26B of the upper case 26, and further to the module case 52 and the mounting bracket 54 via the mounting flange 26F. Go.

  Therefore, even when the conventional cooling and filtering filter is not used, heat exchange performed between the high-temperature gas generated in the combustion chamber 42 and the inflator case 12 is promoted, and at the time of operation. The cooling performance of the gas temperature can be improved.

  Mist (not shown) contained in the gas generated in the combustion chamber 42 flows into the bottom wall portion 26 </ b> D and the peripheral wall portion of the upper case 26 due to flow resistance when passing through the cooling space 44 and the gas flow path 48. Since it adheres to the inner surface of 26B, it is efficiently removed before reaching the gas ejection hole 26C. Thereby, the conventional filter for cooling and filtration is abolished, and the inflator 10 can be reduced in size and weight.

[Second Embodiment]
5, in the inflator 20 according to the present embodiment, the combustion chamber 42 is disposed on the bottom wall portion 26D side of the upper case 26, while the cooling space 44 is disposed on the bottom wall portion 28D side of the lower case 28. ing. Along with this, the ventilation portion 46 that leads from the cooling space 44 to the gas flow path 48 and the partition wall 22 that partitions the cooling space 44 and the combustion chamber 42 are disposed on the bottom wall portion 28D side of the lower case 28. ing. An attachment flange 28F for attaching the inflator 20 to the module case 52 is also integrally provided on the lower case 28 side.

  An annular flange 26E is formed at the lower end of the upper case 26 so as to project radially outward along the circumferential direction. The upper case 26 and the lower case 28 are joined, for example, by welding at a flange 26E of the upper case 26 and an attachment flange 28F of the lower case 28.

  The inner diameters of the peripheral wall portions 26B and 28B in the upper case 26 and the lower case 28 are equal to each other, and the outer diameter of the outer cylinder member 18 is set smaller than the inner diameters of the peripheral wall portions 26B and 28B. As a result, the gas flow path 48 passes from between the peripheral wall portion 28B of the lower case 28 and the outer cylindrical member 18 to between the peripheral wall portion 26B of the upper case 26 and the outer cylindrical member 18, and gas is discharged from the peripheral wall portion 26B. It communicates with the hole 26C.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted. The mounting state of the inflator 10 with respect to the module case 52 and the mounting state of the mounting bracket 54 of the airbag module 60 are also the same as in the first embodiment.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 5, in the inflator 20 according to the present embodiment, the ignition charge 16 in the inner cylinder member 14 is ignited by operating the ignition device 16 when receiving an operating current from the ECU. When the combustion of the transfer charge 15 propagates in the direction of the arrow A into the combustion chamber 42 of the outer cylinder member 18 through the ventilation portion 34 provided on the bottom wall portion 26D side of the upper case 26 in the inner cylinder member 14, The gas generating agent 38 accommodated and held in the combustion chamber 42 burns, and high-temperature and high-pressure gas is generated.

  This gas passes through the communication hole 22A formed in the partition wall 22 and enters the cooling space 44 (in the direction of arrow B), hits the bottom wall portion 28D of the lower case 28, and then enters the gas flow path 48 through the ventilation portion 46. From the gas jet hole 26C formed in the peripheral wall portion 26B on the upper case 26 side, the jet flows out of the inflator 10 (in the direction of arrow C). A ventilation portion 34 for propagating the combustion of the charge transfer agent 15 to the gas generating agent 38 and a communication hole 22A for flowing the generated gas to the cooling space 44 are opposite to each other in the axial direction of the inflator case 12. Therefore, the gas generating agent 38 can be burned efficiently.

  Here, of the upper case 26 and the lower case 28, the side having the bottom wall portion 28 </ b> D facing the cooling space 44, that is, the side directly contacting the high-temperature gas in the cooling space 44, The heat exchange tends to accumulate more heat. In that respect, in the inflator 20 according to the present embodiment, the lower case 28 is integrally provided with a mounting flange 28F for the module case 52 and the vehicle mounting bracket 54. Therefore, as shown by a thick arrow in FIG. Heat can be efficiently released from the mounting flange 28F to the module case 52 and the mounting bracket 54.

  Specifically, the heat of the gas is transmitted to the bottom wall portion 28D of the lower case 28 in the cooling space 44. When the other end 18 </ b> B of the outer cylinder member 18 and the end 22 </ b> B of the partition wall 22 are in contact with the bottom wall part 28 </ b> D of the lower case 28, heat is transmitted from the outer cylinder member 18 or the partition wall 22 to the lower case 28. Thus, the heat transmitted to the bottom wall portion 28D of the lower case 28 reaches the mounting flange 28F through the peripheral wall portion 28B, and is transmitted to the module case 52 and the mounting bracket 54 that are in direct contact with the mounting flange 28F.

  Further, the bottom wall portion 26 </ b> D of the upper case 26 contacts the bottom wall portion 14 </ b> D of the inner cylinder member 14 and faces the combustion chamber 42. Therefore, the combustion heat of the transfer powder 15 is transmitted to the bottom wall portion 26D of the upper case 26 through the bottom wall portion 14D of the inner cylinder member 14, and the heat of the high-temperature gas generated in the combustion chamber 42 is transmitted. . The heat transmitted to the bottom wall portion 26D of the upper case 26 is transmitted from the peripheral wall portion 26B of the upper case 26 to the mounting flange 28F of the lower case 28 through the flange 26E, and further to the module case 52 and the mounting bracket 54. go.

  Therefore, even if the conventional flange is not provided with a cooling and filtering filter and the mounting flange 28F is provided on the lower case 28 side, the high temperature gas generated in the combustion chamber 42 and the inflator case 12 are not used. It is possible to improve the cooling performance of the gas temperature during operation by promoting the heat exchange.

[Third Embodiment]
In FIG. 6, in the inflator 30 according to the present embodiment, at least a portion of the mounting flange 26 </ b> F that abuts on a predetermined portion has a stepped shape and a heat transfer member 66 is provided.

  The stepped shape of the mounting flange 26F is, for example, an inner horizontal portion 26H that projects radially outward from the lower end of the peripheral wall portion 26B of the upper case 26, and a lower side (lower case 28 side) from the end of the inner horizontal portion 26H. The vertical portion 26V extends and the outer horizontal portion 26J projects outward from the lower end of the vertical portion 26V in the radial direction.

  The predetermined part in the present embodiment is, for example, the base member 68. A bent portion 68 </ b> A upward is provided at the edge of the base member 68 on the center side of the inflator 30. When the inflator 30 is attached to the base member 68, the base member 68 directly contacts the outer horizontal portion 26J of the attachment flange 26F, and directly contacts the radially outer surface of the vertical portion 26V at the bent portion 68A. It is like that. The height of the bent portion 68A is equal to the height of the vertical portion 26V of the mounting flange 26F, for example.

  The heat transfer member 66 is a member that comes into contact with the mounting flange 26F and the outer surface (upper surface) of the bottom wall portion 26D of the upper case 26 facing the cooling space 44. It is fixed by. For example, a plurality of heat transfer members 66 are provided in the circumferential direction of the inflator 30 so as to avoid the position of the gas ejection holes 26C. Thereby, the gas is smoothly ejected from the gas ejection holes 26C.

  The heat transfer member 66 includes a horizontal portion 66H extending substantially parallel to the bottom wall portion 26D, and a vertical portion extending downward (lower case 28 side) from an end portion of the horizontal portion 66H which is the radially outer side of the inflator case 12. 66V and an abutting portion 66A that is bent from the lower end of the vertical portion 66V outward in the radial direction of the inflator case 12. The horizontal portion 66H is in contact with the outer surface (upper surface) of the bottom wall portion 26D in the upper case 26, and the contact portion 66A is in contact with the upper surface of the inner horizontal portion 26H in the mounting flange 26F. The vertical portion 66 </ b> V is separated from the peripheral wall portion 26 </ b> B of the upper case 26.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted. Further, since the internal structure of the inflator 30 is the same as that of the first embodiment, illustration is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 6, in the inflator 30 according to the present embodiment, the mounting flange 26F of the upper case 26 and the outer surface of the bottom wall portion 26D of the upper case 26 facing the cooling space 44 are provided. Since the heat transfer member 66 is in contact, the heat stored in the inflator case 12 during operation is not only transmitted to the mounting flange 26F through the inflator case 12 itself, but also in the bottom wall portion 26D of the upper case 26. The heat is transmitted through the heat transfer member 66 from the outer surface to the mounting flange 26F. That is, heat can be transferred to the flange 26F in two systems.

  Furthermore, in this embodiment, since the attachment flange 26F has a stepped shape, it is possible to increase the contact area with the base member 68 that is the attachment location. Specifically, when the inflator 30 is attached to the base member 68, the base member 68 is in direct contact with the outer horizontal portion 26J of the attachment flange 26F, and at the bent portion 68A, the vertical portion 26V is radially outside. It is in direct contact with the side. As a result, the contact area between the base member 68 and the mounting flange 26F is increased. For this reason, at the time of the operation of the inflator 30, heat can be efficiently released from the mounting flange 26F to the base member 68, and the cooling performance of the gas temperature can be further improved.

[Fourth Embodiment]
In FIG. 7, the vehicle airbag apparatus 40 according to the present embodiment is an airbag apparatus for a passenger seat, and the flange 26F of the inflator 10 is in direct contact with a mounting bracket 54 as a predetermined portion. Thus, the airbag module 70 is fixedly attached to the mounting bracket 54.

  Specifically, for example, the mounting flange 26F of the inflator 10 according to the first embodiment is directly bolted to the mounting bracket 54 by the stud bolt 56 and the nut 58 of the retainer 64. For example, a pair of mounting brackets 54 are provided on an instrument panel reinforcement 74 extending in the vehicle width direction in an instrument panel (not shown).

  The airbag module 70 in the vehicle airbag apparatus 40 has a configuration using, for example, a cloth module case 72. At the bottom of the module case 72, an inflator insertion hole 72A into which, for example, a gas ejection hole 26C of the inflator 10 is inserted, and a through hole 72B into which the stud bolt 56 of the retainer 64 is inserted are formed.

  The upper part of the module case 72 is opened to allow the airbag 62 to bulge. At the opening edge portion, a reinforcing portion 72C is provided, for example, over the entire circumference. The reinforcing portion 72C is configured by partially thickening the cloth of the module case 72 or by using a reinforcing member separately. A plurality of through holes 72D are formed in series in the vehicle front side and the vehicle rear side in the reinforcing portion 72C.

  For example, a metal frame 76 is disposed inside the reinforcing portion 72C. A plurality of hooks 76A are provided on the vehicle front side and the vehicle rear side of the frame 76, respectively. The hook 76 </ b> A is locked to an airbag door 78 that covers the opening side of the module case 72.

  Specifically, a frame-like vertical wall portion 78B that is slightly larger than the reinforcing portion 72C of the module case 72 is provided on the lower surface side of the airbag door 78. The vertical wall portion 78B is provided on the vehicle front side. A plurality of through holes 78A are formed in series on the side and the side on the vehicle rear side, respectively. The hook 76 </ b> A of the frame body 76 is inserted into the through hole 72 </ b> D of the reinforcing portion 72 </ b> C in the module case 72 and is inserted into the through hole 78 </ b> A of the airbag door 78.

  As a result, the module case 72 that houses the airbag 62 and the retainer 64 is locked to the airbag door 78 via the frame 76 to form the airbag module 70.

  In order to bring the mounting flange 26F of the inflator 10 into direct contact with the mounting bracket 54, the mounting flange 26F is disposed between the module case 72 and the mounting bracket 54. In consideration of workability when attaching the airbag module 70 to the mounting bracket 54, the stud bolt 56 of the retainer 64 is passed through the through hole 26G of the mounting flange 26F of the inflator 10 to temporarily connect the inflator 10 to the module case 72. You may stop it.

  When the inflation pressure of the airbag 62 acts, the airbag door 78 is configured to be deployed by, for example, breaking and breaking a predetermined scheduled breakage portion, and allowing the airbag 62 to bulge. Yes.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the present embodiment, the mounting flange 26F of the inflator 10 is directly bolted to the mounting bracket 54 of the instrument panel reinforcement 74, so that the airbag module 70 is mounted and fixed to the vehicle. During the operation, heat can be released directly from the inflator case 12 to the mounting bracket 54, and further, heat can be released from the mounting bracket 54 to the instrument panel reinforcement 74. For this reason, the cooling performance of the gas temperature during operation can be further improved.

  Although the module case 72 in the airbag module 70 is made of cloth, the present invention is not limited to this, and the module case 72 may be made of metal. In this case, the mounting flange 26F of the inflator 10 is disposed on the lower surface side of the module case 72 and is sandwiched between the module case 72 and the mounting bracket 54, and the mounting flange 26F is directly attached to the module case 72 and the mounting bracket 54. Can be contacted. Accordingly, when the inflator 10 is operated, heat can be directly released from the inflator case 12 to the module case 72, and heat can be released from the module case 72 to the mounting bracket 54 and further to the instrument panel reinforcement 74.

  Further, the mounting flange 26F of the inflator 10 can be disposed on the upper surface side of the bottom wall portion of the module case 72 and brought into direct contact with the module case 72 and can be bolted to the mounting bracket 54 via the module case 72. In this case, when the inflator 10 is operated, heat can be released directly from the inflator case 12 to the module case 72, and further, heat can be released from the module case 72 to the mounting bracket 54 and further to the instrument panel reinforcement 74.

  In any case, it is possible to improve the cooling performance of the gas temperature when the inflator 10 is operated. The inflator used in the vehicle airbag device 40 is not limited to the inflator 10 according to the first embodiment, and the inflator 20 according to the second embodiment and the inflator 30 according to the third embodiment are applied. Is also possible.

[Fifth Embodiment]
In FIG. 8, the vehicle airbag apparatus 50 according to the present embodiment is an airbag apparatus for a driver's seat, and the flange 26F of the inflator 10 is in direct contact with a base member 82 as a predetermined portion. The airbag module 80 is fixedly attached to a steering wheel 84 in the vehicle.

  Specifically, for example, the mounting flange 26F of the inflator 10 according to the first embodiment is directly bolted to the base member 82 by the stud bolt 56 and the nut 58 of the retainer 64. The base member 82 also serves as a mounting bracket that is bolted, for example, to the steering wheel 84. For example, an annular central portion 82C and a pair of arm portions 82D that extend radially outward from the central portion 84C. It is configured.

  In the center portion 82C of the base member 82, an inflator insertion hole 82A into which, for example, a gas ejection hole 26C of the inflator 10 is inserted, and a through hole 82B into which the stud bolt 56 of the retainer 64 is inserted are formed. Also, attachment portions 82E are bent at the ends of both arm portions 82D. The attachment portion 82E is formed with a through hole 82F into which a bolt (not shown) for fastening and fixing the base member 82 to the attachment portion 84A of the steering wheel 84 is inserted.

  A metal portion constituting the skeleton of the steering wheel 84 is exposed at the mounting portion 84A of the steering wheel 84, so that heat is efficiently transmitted from the base member 82 to the steering wheel 84 when the inflator 10 is operated. Yes. In addition, an insertion hole 84B for inserting a fastening bolt (not shown) from the side of the steering wheel 84 is provided for the attachment portion 84A, for example.

  The airbag module 80 in the vehicle airbag apparatus 50 has a configuration using a module case 72 made of cloth, for example. At the bottom of the module case 72, an inflator insertion hole 72A into which, for example, a gas ejection hole 26C of the inflator 10 is inserted, and a through hole 72B into which the stud bolt 56 of the retainer 64 is inserted are formed.

  A plurality of hooks 72E are provided on the vehicle front side and the vehicle rear side of the module case 72, respectively. The hook 72E is locked to a through hole 78A of an airbag door 78 that covers the opening side of the module case 72. The configuration of the airbag door 78 is the same as that of the fourth embodiment (FIG. 7), but the airbag door 78 according to the present embodiment also serves as a steering pad in the steering wheel 84. As a result, the module case 72 containing the airbag 62 and the retainer 64 is locked to the airbag door 78 to form the airbag module 80.

  In order to directly contact the mounting flange 26F of the inflator 10 with the base member 82, the mounting flange 26F is disposed, for example, between the module case 72 and the steering wheel 84. In addition, the mounting flange 26 </ b> F may be disposed between the module case 72 and the base member 82. In consideration of workability when attaching the base member 82 and the airbag module 80 to the steering wheel 84, the stud bolt 56 of the retainer 64 is passed through the through-hole 26G of the attachment flange 26F of the inflator 10, and the inflator 10 is attached to the module case 72. In addition, the base member 82 may be temporarily fixed.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In this embodiment, since the airbag module 80 is bolted to the steering wheel 84 with the mounting flange 26F of the inflator 10 in direct contact with the base member 82, the inflator case is operated when the inflator 10 is operated. The heat can be directly released from the base member 82 to the base member 82, and the heat can be released from the base member 82 to the steering wheel 84. For this reason, the cooling performance of the gas temperature during operation can be further improved.

  Although the module case 72 in the airbag module 80 is made of cloth, the present invention is not limited to this, and the module case 72 may be made of metal as shown in FIG. In this case, since the heat conductivity is better than that of cloth, the base member 82 (FIG. 8) may not be used. When the base member 82 is not used, the module case 72 is provided with a pair of mounting brackets 86 for bolting the module case 72 to the mounting portion 84A of the steering wheel 84. The mounting bracket 86 is formed, for example, in a substantially U-shaped cross section, and is fixed to the side wall portion 72F of the module case 72 by, for example, welding. The mounting bracket 86 is formed with through holes 86A for passing fastening bolts (not shown).

  In the case of the example shown in FIG. 9, the mounting flange 26 </ b> F of the inflator 10 may be disposed on the lower surface side of the module case 72 or may be disposed on the upper surface side. In any case, the mounting flange 26F can be brought into direct contact with the module case 72. Thus, when the inflator 10 is operated, heat can be directly released from the inflator case 12 to the module case 72, and further, heat can be efficiently released from the module case 72 to the steering wheel 84.

  Thus, in this embodiment, even if it is an airbag apparatus for driver's seats, it is possible to improve the cooling performance of the gas temperature when the inflator 10 is operated. The inflator used for the vehicle airbag device 50 is not limited to the inflator 10 according to the first embodiment, and the inflator 20 according to the second embodiment and the inflator 30 according to the third embodiment are applied. Is also possible.

  In each of the above embodiments, a heat conductive grease or the like may be interposed between the mounting flange 26F and each predetermined portion. This is because the heat of the inflator case 12 can be more efficiently released from the mounting flange 26F to a predetermined portion.

DESCRIPTION OF SYMBOLS 10 Inflator 12 Inflator case 14 Inner cylinder member 15 Transfer agent 16 Ignition device 18 Outer cylinder member 18B Other end 20 Inflator 22 Partition 22A Communication hole
22B end
22D Inner annular wall
22E Outer annular wall part 26 Upper case 26B Peripheral wall part 26C Gas ejection hole 26D Bottom wall part 26F Mounting flange (flange)
DESCRIPTION OF SYMBOLS 28 Lower case 28B Perimeter wall part 28D Bottom wall part 30 Inflator 32 Step part 34 Ventilation part 38 Gas generating agent 40 Vehicle airbag apparatus 42 Combustion chamber 44 Space for cooling 48 Gas flow path 50 Vehicle airbag apparatus 52 Module case (predetermined) Part)
54 Mounting bracket 62 Air bag 66 Heat transfer member 68 Base member 72 Module case (predetermined part)
74 Instrument panel reinforcement 82 Base member (predetermined part)
84 Steering wheel

Claims (9)

An inflator case comprising a bottomed cylindrical upper case, and a bottomed cylindrical lower case that closes an opening at an end of the upper case, and a plurality of gas ejection holes formed in a peripheral wall portion on the upper case side; ,
An inner cylinder member that is disposed inside the inflator case, and stores and holds a charge transfer agent;
An ignition device disposed in the inner cylinder member for igniting the transfer charge;
Inside the inflator case, one end is arranged on one side in the axial direction of the inflator case and closed, and the other end is arranged on the other side in the axial direction of the inflator case, and the combustion of the transfer charge propagates. An outer cylinder member that houses and holds a gas generating agent that burns and generates gas around the inner cylinder member;
A combustion chamber provided between the outer cylinder member and the inner cylinder member, located on the one end side of the outer cylinder member and containing the gas generating agent, and located on the other end side of the outer cylinder member And a plurality of communication holes that allow the flow of the gas from the combustion chamber side to the cooling space side are provided, and an inner peripheral edge of the peripheral wall portion of the inner cylinder member is provided . An inner annular wall portion that fits to the outer surface, and a partition wall that has an outer annular wall portion that fits to the inner surface of the outer cylinder member on the outer peripheral edge ;
A gas flow path that communicates with the cooling space on the other end side of the outer cylinder member and communicates with the gas ejection hole of the upper case inside the inflator case and outside the outer cylinder member. Formed,
The gas generated in the combustion chamber flows into the cooling space through the communication hole of the partition wall and directly hits the bottom wall portion of the inflator case facing the cooling space. By making it flow into the flow path, it is configured not to use a filter for cooling and filtering the gas,
Further, of the upper case and the lower case, a flange for mounting to a predetermined part is integrally provided on the case having the bottom wall portion facing the cooling space ,
The other end of the outer cylindrical member, the bottom wall portion of the inner cylindrical member, and the end portions of the inner annular wall portion and the outer annular wall portion of the partition wall of the inflator case facing the cooling space. An inflator in contact with the bottom wall .   The inflator according to claim 1, wherein a ventilation portion communicating with the combustion chamber and the inner side of the inner cylinder member is provided at an end portion on the combustion chamber side in the axial direction of the inner cylinder member. The outer cylinder member is fitted inside the lower case,
The lower case is fixed to the upper case in a state in which an opening side end portion is fitted inside the peripheral wall portion of the upper case,
A step portion is formed by the opening side end portion of the lower case and the peripheral wall portion of the upper case,
The inflator according to claim 1 or 2, wherein the gas flow path is defined by the stepped portion, the outer cylinder member, and the peripheral wall portion of the upper case.   The inflator according to any one of claims 1 to 3, wherein at least a portion of the flange that is in contact with the predetermined portion has a stepped shape. An inflator case comprising a bottomed cylindrical upper case, and a bottomed cylindrical lower case that closes an opening at an end of the upper case, and a plurality of gas ejection holes formed in a peripheral wall portion on the upper case side; ,
An inner cylinder member that is disposed inside the inflator case, and stores and holds a charge transfer agent;
An ignition device disposed in the inner cylinder member for igniting the transfer charge;
Inside the inflator case, one end is arranged on one side in the axial direction of the inflator case and closed, and the other end is arranged on the other side in the axial direction of the inflator case, and the combustion of the transfer charge propagates. An outer cylinder member that houses and holds a gas generating agent that burns and generates gas around the inner cylinder member;
A combustion chamber provided between the outer cylinder member and the inner cylinder member, located on the one end side of the outer cylinder member and containing the gas generating agent, and located on the other end side of the outer cylinder member And a partition wall provided with a plurality of communication holes that allow the flow of the gas from the combustion chamber side to the cooling space side.
A gas flow path that communicates with the cooling space on the other end side of the outer cylinder member and communicates with the gas ejection hole of the upper case inside the inflator case and outside the outer cylinder member. Formed,
The gas generated in the combustion chamber flows into the cooling space through the communication hole of the partition wall and directly hits the bottom wall portion of the inflator case facing the cooling space. By making it flow into the flow path, it is configured not to use a filter for cooling and filtering the gas,
Further, of the upper case and the lower case, a flange for mounting to a predetermined part is integrally provided on the case having the bottom wall portion facing the cooling space,
Said flange and said inflator casing outer surface and the inflator abutting heat transfer member is that provided facing the space for the cooling. The module case is configured by attaching the inflator according to any one of claims 1 to 5 and storing an airbag that is inflated and deployed in response to supply of gas from the inflator in a folded state. An airbag module
The airbag module is a vehicle airbag device that is attached and fixed to a vehicle in a state where the flange of the inflator is in direct contact with the module case as the predetermined portion.   The vehicle airbag according to claim 6, wherein the flange of the inflator is bolted to a mounting bracket provided on an instrument panel reinforcement in the vehicle, directly or via the module case. apparatus. The inflator according to any one of claims 1 to 5 is attached to the base member, and an airbag that is inflated and deployed by receiving gas supply from the inflator is attached in a folded state. An airbag module,
The airbag module is a vehicle airbag device that is attached and fixed to a vehicle in a state where the flange of the inflator is in direct contact with the base member as the predetermined portion.   The vehicle airbag device according to claim 8, wherein the base member is bolted to a steering wheel in the vehicle.

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