JP2011225197A - Hybrid inflator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid inflator which can be constituted to be high output and compact and can suppress flow-out of residue.SOLUTION: In the inflator 1, an intermediate chamber 37 is arranged in series between a gas generation chamber 26 generating a combustion gas FG and a discharge chamber 45 having a gas discharge port 47. The intermediate chamber 37 is communicated to the gas generation chamber 26 via a jet port 34 blocked by a first rupture disk 35, and is communicated to the discharge chamber 45 via an outlet 42 blocked by a second rapture disk 43. A gas filling chamber 22 communicated to the intermediate chamber via a communication port 40 and filled with pressure gas PG is disposed at a periphery of the intermediate chamber 37. In the intermediate chamber 37, a circulating path FR making the pressure gas PG flow to the discharge chamber 45 via the outlet 42 is secured, the combustion gas FG can be guided to the side of a communication port 40 and a gas flow regulating portion 38 is disposed to cover the jet port 34.

Description

  The present invention relates to a hybrid inflator having a configuration in which combustion gas generated by ignition of a squib and sealed pressurized gas are discharged from a gas discharge port during operation, such as for a driver seat or a passenger seat of a vehicle. The present invention relates to an inflator suitable for inflating an airbag of an airbag device.

  The conventional hybrid inflator is a disc-shaped disk type, in which a gas sealing chamber filled with pressurized gas is arranged in an annular shape, a gas generation chamber is arranged at the lower side of the center, and a gas generating chamber is arranged above it. In this order, an intermediate chamber and a discharge chamber provided with a gas discharge port have been known in order (see, for example, Patent Document 1). The gas generation chamber is provided with a squib and a gas generating agent that generates combustion gas by ignition of the squib. A jet port is provided in the partition wall between the gas generation chamber and the intermediate chamber, and a communication port is opened in the partition wall between the gas sealing chamber and the intermediate chamber. The intermediate chamber and the discharge chamber On the partition wall, an outlet was opened. Furthermore, the jet outlet and the outlet were respectively closed by the first and second rupture discs.

  In this inflator, during operation, when the gas generating agent is ignited by ignition of the squib and the combustion gas of the gas generating agent is generated, the injection port is blocked by the shock wave, pressure, heat, etc. accompanying the generation. 1 The rupture disc ruptures and the combustion gas flows into the intermediate chamber. Then, the pressurized gas flowing into the intermediate chamber through the communication port is heated to increase the pressure, and with the pressure of the combustion gas, the second rupturable plate that has blocked the outlet is instantaneously ruptured. As a result, the mixed gas of the pressurized gas and the combustion gas sealed in the gas sealing chamber flows into the discharge chamber through the intermediate chamber, and is discharged out of the inflator from the gas discharge port of the discharge chamber. Was supposed to be.

China practical new exclusive patent manual ZL200820017796.1 (publication number CN2011169241Y)

  However, the inflator described above is configured such that when the squib is ignited and combustion gas is generated, the first and second rupture plates are instantaneously ruptured and a mixed gas of the combustion gas and the pressurized gas is discharged. Therefore, the temperature of the pressurized gas was insufficient. That is, when the pressurized gas is ejected from the combustion gas ejection port, the portion filled in the intermediate chamber is merely heated and pressurized, and most of the gas sealed in the gas sealing chamber is In association with the rupture of the second rupture disc following the rupture of the one rupture disc, the rupture was discharged without being heated. Therefore, in such a configuration, for example, when the output of the mixed gas is increased so as to inflate a large-capacity airbag and the output is increased, the pressurized gas or combustion gas sealed in the gas sealing chamber The amount of the gas generating agent that generates water must be increased to cope with this problem, leading to an increase in the size of the inflator.

  Furthermore, the above hybrid inflator is not configured to capture the residue even if the combustion gas contains a residue, and the mixed gas with reduced residue is discharged from the gas discharge port. There was also room for improvement.

  The present invention solves the above-described problems, and an object of the present invention is to provide a hybrid inflator that can be configured to have a high output and a compact size and can also suppress the outflow of residue.

A hybrid inflator according to the present invention is a hybrid inflator having a configuration in which a mixed gas of combustion gas generated by ignition of a squib and sealed pressurized gas is discharged from a gas discharge port during operation,
A gas generation chamber containing a gas generating agent for generating combustion gas and a squib;
A discharge chamber having a gas discharge port;
The gas generation chamber and the discharge chamber are arranged in series, communicated with the gas generation chamber via a spout blocked by the first rupturable plate, and with respect to the discharge chamber. And an intermediate chamber communicated via an outlet closed by the second rupturable plate,
A gas-filled chamber that is placed around the intermediate chamber with sealed pressurized gas, and communicated with the intermediate chamber via a communication port;
Configured with
The intermediate room
Secure a flow passage that allows the pressurized gas in the gas enclosure chamber to flow out to the discharge chamber through the outlet,
Combustion gas from the gas generation chamber can be guided to the communication port side, and a gas flow regulating part is provided on the downstream side of the flow of combustion gas from the communication port so as to face the injection port and cover the injection port. It is characterized by being configured.

  In the hybrid inflator according to the present invention, during operation, the gas generating agent in the gas generating chamber is combusted by ignition of the squib to generate combustion gas. The first rupture plate is ruptured by the shock wave, pressure, heat, and the like to open the ejection port, so that the combustion gas flows from the gas generation chamber to the intermediate chamber via the ejection port. The combustion gas that has flowed into the intermediate chamber flows into the gas-filled chamber through the communication port and tends to go to the outlet on the discharge chamber side. However, a gas flow restricting portion is disposed on the outflow side so as to be able to guide the combustion gas to the communication port side so as to face the jet port and cover the jet port. For this reason, the combustion gas from the jet port is restricted in flow by the gas flow restricting portion, and hardly flows to the outflow side, and flows into the gas filled chamber through the communication port. Then, the combustion gas that has flowed into the gas sealing chamber raises the temperature of the pressurized gas in the gas sealing chamber, so that the pressure of the pressurized gas in the gas sealing chamber increases, and the second gas passes through the flow path along with the combustion gas. A high pressure is applied to the rupturable plate to rupture the second rupturable plate. As a result, the pressurized gas whose temperature has been raised in the gas filled chamber is mixed with the combustion gas to become a mixed gas, and this mixed gas passes through the outlet port opened by the burst of the second rupturable plate from the flow path, It flows into the discharge chamber and is discharged from the gas discharge port. Then, the pressurized gas component of the mixed gas discharged from the gas discharge port is guided by the gas flow restricting portion and combusted into the gas sealed chamber as compared with the state in which the pressurized gas is flowed into the gas sealed chamber before the operation. Even if the temperature is increased and the pressure is positively increased by the gas and the inflator is compact, the mixed gas is increased in volume and discharged from the gas discharge port in a high pressure state. The output of the inflator will be increased.

  Furthermore, since the gas flow restricting portion is disposed so as to cover the spout facing the jet outlet of the gas generation chamber, the combustion gas from the spout changes the direction of flow by hitting the gas flow restricting portion, The residue contained in the combustion gas hits the gas flow restricting portion, adheres to the gas flow restricting portion, and is removed. For this reason, the mixed gas discharged from the gas outlet through the portion of the gas flow restricting portion is discharged in a state where the residue is reduced. As a result, for example, when the hybrid inflator is used in an airbag device that inflates an airbag, it is possible to prevent a high-temperature residue from flowing into the airbag.

  Therefore, the hybrid inflator according to the present invention can be configured to have a high output and a compact size, and can also suppress the outflow of the residue.

  In the hybrid inflator according to the present invention, the gas flow restricting portion is formed from a closing plate disposed downstream of the flow of the combustion gas from the communication port so as to block the entire inner circumferential side of the intermediate chamber. The intermediate chamber may be provided with a second communication port that communicates with the gas sealing chamber at a position closer to the outlet side than the gas flow regulating portion, and the flow passage may be provided.

  In such a configuration, all of the combustion gas from the gas generation chamber flows into the gas sealing chamber through the communication port by the closing plate as the gas flow restricting section, and the pressurized gas is stably raised. Can be warmed. Then, the mixed gas of the pressurized gas and the combustion gas, which has been heated, flows into the outlet side of the intermediate chamber through the flow passage formed by the second communication port, and enters the discharge chamber through the opened outlet port. It flows in and is discharged from the gas discharge port.

  Of course, the combustion gas hits the gas flow restricting section and causes residues to adhere to the gas flow restricting section, and actively flows to the discharge chamber through the gas filled chamber so as to bypass the gas. It is possible to effectively raise the temperature and pressure of the pressurized gas in the gas filled chamber while attaching the residue. As a result, with the above configuration, it is possible to more effectively reduce the residue and raise the temperature and pressure of the pressurized gas.

  Further, in the hybrid inflator according to the present invention, the gas flow restriction unit can capture the residue in the combustion gas and can pass the combustion gas and the pressurized gas so as to be arranged with the flow passage. It can consist of filters. In such a configuration, the mixed gas toward the discharge chamber side finally passes through the filter, and at the time of the passage, the filter can further capture the residue and further suppress the outflow of the residue. .

  Or you may comprise as a gas flow control part from the opening obstruction | occlusion board which provides the through-hole which forms a flow path as an opening smaller than a jet nozzle, and block | closes the inner periphery of an intermediate | middle chamber. In such a configuration, since the size and number of through holes provided in the closing plate can be adjusted arbitrarily, adjustment of the flow rate characteristics of the mixed gas discharged from the discharge chamber, for example, the mixed gas takes a long time. It is also possible to make adjustments such as discharging, or discharging a large amount of mixed gas in a short time.

  When the gas flow restricting portion is formed of a filter or a perforated blocking plate as described above, the intermediate chamber is in communication with the gas sealing chamber at a position closer to the outlet side than the gas flow restricting portion. A communication port may be provided.

  In such a configuration, when the combustion gas is ejected from the ejection port of the gas generation chamber, most of the combustion gas flows to the gas sealing chamber through the communication port near the ejection port by the gas flow restriction unit, Thereafter, it is possible to secure a state in which the air flows into the intermediate chamber from the communication port on the side away from the ejection port and flows to the discharge chamber side. For this reason, the combustion gas hits the gas flow restricting portion and causes the residue to adhere to the gas flow restricting portion, and actively flows to the discharge chamber through the gas filled chamber so as to be bypassed. It is possible to increase the temperature and pressure of the pressurized gas in the gas filled chamber while adhering the residue, so that it is possible to effectively reduce the residue and increase the temperature and pressure of the pressurized gas.

1 is a longitudinal sectional view of a hybrid inflator according to a first embodiment of the present invention. It is a schematic cross section of the hybrid inflator of 1st Embodiment, and respond | corresponds to the II-II site | part of FIG. It is a schematic cross section of the hybrid inflator of 1st Embodiment, and respond | corresponds to the III-III site | part of FIG. It is a schematic cross section of the hybrid inflator of 1st Embodiment, and respond | corresponds to the IV-IV site | part of FIG. It is a longitudinal cross-sectional view which shows the state at the time of the action | operation of the hybrid inflator of 1st Embodiment in order. It is a longitudinal cross-sectional view of the hybrid inflator of 2nd Embodiment. It is a schematic cross section of the hybrid inflator of 2nd Embodiment, and respond | corresponds to the VII-VII site | part of FIG. It is a schematic cross section of the hybrid inflator of 2nd Embodiment, and respond | corresponds to the VIII-VIII site | part of FIG. It is a longitudinal cross-sectional view which shows the state at the time of the action | operation of the hybrid inflator of 2nd Embodiment in order. It is a longitudinal cross-sectional view of the hybrid inflator of 3rd Embodiment. It is a longitudinal cross-sectional view which shows the state at the time of the action | operation of the hybrid inflator of 3rd Embodiment in order. It is a longitudinal cross-sectional view of the hybrid inflator of 4th Embodiment. It is a longitudinal cross-sectional view which shows the state at the time of the action | operation of the hybrid inflator of 4th Embodiment in order.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A hybrid inflator (hereinafter simply referred to as an inflator) 1 according to a first embodiment is provided in a cylindrical housing 3 as shown in FIGS. An annular gas sealing chamber 22 is disposed on the outer peripheral side of the gas generating chamber 26, and the gas generating chamber 26, the intermediate chamber 37, and the discharge chamber 45 are connected in series from the bottom to the top inside the gas sealing chamber 22. Are arranged. And the housing 3 is each provided with the ceiling side part 4 and the bottom side part 11 which consist of metal materials, such as steel. In the case of the first embodiment, as will be described later, the gas generation chamber 26 and the intermediate chamber 37 are disposed in the inner cylinder portion 15 extending from the peripheral edge of the insertion hole 12a of the bottom side portion 11.

  The ceiling side portion 4 on the upper side includes a disk-shaped top plate portion 5 and a peripheral wall portion 8 extending in a cylindrical shape from the outer peripheral edge of the top plate portion 5 to the lower side on the bottom side portion 11 side. ing. In the center of the top plate part 5, a projecting part 6 projecting upward in a columnar shape is arranged. The projecting portion 6 constitutes the outer wall of the discharge chamber 45, and a plurality of gas discharge ports opened in a circular shape for discharging the mixed gas CG in a direction orthogonal to the axis O of the housing 3 on the cylindrical peripheral wall 6 a. 47 is arranged. In the case of the embodiment, four gas discharge ports 47 are arranged at equal intervals along the circumferential direction around the axis O of the housing 3. A flange portion 9 protruding outward is disposed at the lower end of the peripheral wall portion 8, and an attachment hole 9 a for attaching the inflator 1 to a predetermined location is disposed in the flange portion 9.

  The bottom side portion 11 on the lower side includes an annular bottom plate portion 12, a cylindrical peripheral wall portion 13 extending upward from the outer edge of the bottom plate portion 12 to the top plate portion 5 side, and an insertion disposed at the center of the bottom plate portion 12. An inner cylindrical portion 15 extending vertically from the periphery of the hole 12a. An upper end 13 a of the peripheral wall portion 13 is welded to a lower end 8 a of the peripheral wall portion 8 of the ceiling side portion 4.

  The inner cylindrical portion 15 has a disk-shaped intermediate wall portion 18 formed on the inner peripheral side so as to close the inner peripheral side of the inner cylindrical portion 15. The inner cylinder portion 15 includes an inner bottom side wall portion 16 on the bottom plate portion 12 side and an inner top side wall portion 17 on the top plate portion 5 side with the intermediate wall portion 18 therebetween. The intermediate wall 18 is a part that divides the gas generation chamber 26 and the intermediate chamber 37, and a jet port 34 that is opened in a circular shape is formed at the center. The inner bottom side wall portion 16 constitutes a cylindrical partition wall that partitions the gas generation chamber 26 and the gas sealing chamber 22, and the inner ceiling side wall portion 17 has a cylindrical shape that partitions the gas sealing chamber 22 and the intermediate chamber 37. The partition wall is configured.

  The inner ceiling side wall portion 17 has a plurality of communication ports 40 opened in a circular shape at positions close to the intermediate wall portion 18, and a plurality of openings opened in a circle at positions close to the top plate portion 5. A second communication port (second communication port) 41 is opened. These communication ports 40 and 41 are openings for communicating the intermediate chamber 37 and a gas sealing chamber 22 to be described later, and are arranged in a radial manner about eight axial centers O of the housing 3. The sum of the opening areas of the eight communication ports 41 is set to be larger than the sum of the opening areas of the four gas discharge ports 47. In the case of the first embodiment, each communication port 40 is configured to have the same opening area as the second communication port 41.

  And the inner cylinder part 15 makes the front-end | tip 15a weld to the lower surface 5a of the top-plate part 5 of the ceiling side part 4, and the site | part extended below from the periphery of the insertion hole 12a is used as the caulking part 19, This caulking part 19 is used. 1, the holder 30 that holds the squib 28 of the gas generator 27 is attached to the bottom plate portion 12 of the bottom side portion 11 by crimping it so as to be tilted inward while being plastically deformed. It is fixed.

  The gas sealing chamber 22 in which the pressurized gas PG is sealed is disposed in an annular shape so as to surround the intermediate chamber 37. Specifically, the gas sealing chamber 22 has an inner and outer periphery between the top plate portion 5 of the ceiling side portion 4 and the bottom plate portion 12 of the bottom side portion 11, and the inner cylinder portion 15 and the peripheral wall portions 8 and 13. Are surrounded by. In the case of the first embodiment, the pressurized gas PG uses an inert gas such as argon.

  In addition, the bottom plate portion 12 includes a sealing port 23 that is opened to seal the pressurized gas PG in the gas sealing chamber 22, and a sealing pin 24 that closes the sealing port 23 after sealing the pressurized gas PG. Are disposed.

  The gas generation chamber 26 is formed by being surrounded by an inner bottom side wall portion 16 below the intermediate wall portion 18 in the inner cylindrical portion 15, and a gas generator 27 is disposed in the inner bottom side wall portion 16 to be caulked. It is formed by caulking the portion 19 and attaching and fixing the gas generator 27 to the inner bottom side wall portion 16. At that time, the holder 30 is pressed by the caulking portion 19, and the gas generator 27 is disposed and fixed in the gas generation chamber 26. In the gas generator 27, a gas generating agent 29 for generating a combustion gas FG such as nitrogen gas containing a flame during combustion is housed in a cup 31 made of aluminum alloy or the like, and a squib for igniting the gas generating agent 29 28 and a cup 31 are assembled to a disc-shaped holder 30. A plurality of triangular plate-shaped flaps 32a (see FIG. 5A) that are pushed open by the combustion gas FG generated by burning the gas generating agent 29 are disposed on the ceiling wall 32 of the cup 31 away from the holder 30. Yes. In the periphery of the flap 32a, unillustrated portions to be broken, which are not shown, are arranged radially, and each flap 32a is configured to open from the axis O side of the housing 3 toward the periphery.

  The combustion gas FG combusted by the gas generating agent 29 can also be said to be a heating medium FG for raising the temperature and pressure of the pressurized gas PG. Therefore, the gas generating agent 29 is a heating medium generating agent that generates the heating medium FG by burning. 29, the gas generation chamber 26 can be rephrased as the heat medium generation chamber 26, and the gas generator 27 can be restated as the heat medium generator 27.

  Further, in the embodiment, as the composition constituting the gas generating agent (heat medium generating agent) 29, the main component Mg / Al alloy containing an oxidizing agent or a binder is used, and at the time of combustion, The heating medium (combustion gas) FG in which more flames are generated than the high-temperature gas component mainly increases the temperature of the pressurized gas PG by the combustion gas FG having a large amount of flame components.

  The ejection port 34 provided in the intermediate wall 18 is closed by a first rupturable plate 35 made of a metal plate or the like, and the first rupturable plate 35 has its shock wave or pressure when the combustion gas FG is generated. Or ruptured by heat or the like.

  The intermediate chamber 37 is disposed between the top plate portion 5 and the intermediate wall portion 18, in other words, between the discharge chamber 45 and the gas generation chamber 26, at a portion surrounded by the inner ceiling side wall portion 17. ing. As described above, the intermediate chamber 37 communicates with the gas sealing chamber 22 through the communication ports 40 and 41.

  In the intermediate chamber 37, the combustion gas FG from the gas generation chamber 26 can be guided to the communication port 40, and the injection port faces the injection port 34 on the downstream side of the flow of the combustion gas FG from the communication port 40. A gas flow restricting portion 38 is disposed so as to cover 34. The gas flow restricting portion 38 is provided with a flow passage FR that allows the pressurized gas PG in the gas sealing chamber 22 to flow into the discharge chamber 45 through the outlet 42.

  In the case of the first embodiment, the gas flow restricting portion 38 is a disc-shaped closing plate that is welded to the inner peripheral surface of the inner ceiling side wall portion 17 between the communication port 40 and the second communication port 41. 39. The closing plate 39 is formed of a metal material such as steel similar to the ceiling side portion 4 of the housing 1.

  In the case of the first embodiment, the closing plate 39 completely closes the entire area on the inner peripheral side between the communication port 40 and the second communication port 41. Therefore, the flow path FR through which the pressurized gas PG in the gas sealing chamber 22 can flow out to the discharge chamber 45 through the outlet 42 is a partition wall (inner ceiling side wall portion) 17 between the gas sealing chamber 22 and the intermediate chamber 37. , The second communication port 41 disposed between the gas flow restricting portion 38 and the outlet 42 is secured.

  In the first embodiment, the intermediate chamber 37 is vertically partitioned by the closing plate 39. In other words, the intermediate chamber 37 is located upstream of the combustion gas FG by the closing plate 39. It can be said that it is composed of a lower-side upstream chamber 37a and an upper-side downstream chamber 37b which is the downstream side of the combustion gas FG.

  The discharge chamber 45 is provided in the protruding portion 6 of the top plate portion 5 and includes a plurality of (four in the embodiment) gas discharge ports 47 as described above. The discharge chamber 45 is provided with an outlet 42 that is closed by a metal second rupturable plate 43 between the discharge chamber 45 and the intermediate chamber 37. The outflow port 42 is disposed on the inner peripheral edge of the protruding portion 6 of the top plate portion 5, and when the pressure of the mixed gas CG of the pressurized gas PG and the combustion gas FG heated and increased is raised, the second rupturable plate 43. Opens when it bursts. At that time, the mixed gas CG flows out from the intermediate chamber 37 through the opened outlet 42, flows into the discharge chamber 45, and is discharged from the gas discharge port 47.

  In the case of the embodiment, in the second rupturable plate 43, the combustion gas FG generated in the gas generating chamber 26 ruptures the first rupturable plate 35 and flows into the upstream chamber 37a and the downstream chamber 37b of the intermediate chamber 37. Even so, it is set not to burst immediately. That is, the second rupturable plate 43 has an intermediate wall portion so that the combustion gas FG flowing into the intermediate chamber 37 can sufficiently raise the temperature and pressure of the pressurized gas PG in the gas sealing chamber 22 through the communication port 40. The strength is set in consideration of the distance L from 18 and the wall thickness t or the pressure loss of the combustion gas FG due to the communication ports 40 and 41. In the case of the first embodiment, the second rupturable plate 43 is set so as to burst when the inside of the downstream chamber 37b of the intermediate chamber 37 reaches 90 MPa or more. Incidentally, the pressurized gas PG sealed in the gas sealing chamber 22 is 40 MPa.

  In the inflator 1 according to the first embodiment, during operation, the gas generating agent 29 in the gas generating chamber 26 is first ignited by the ignition of the squib 28 and burned, as shown in FIG. The combustion gas FG is generated. Then, the first rupturable plate 35 is ruptured by the shock wave, pressure, heat of the combustion gas FG, or the collision of the flap 32a to be pushed open, and the jet port 34 is opened. Therefore, first, the combustion gas FG flows from the gas generation chamber 26 into the upstream chamber 37 a of the intermediate chamber 37 through the jet port 34. The combustion gas FG that has flowed into the upstream chamber 37a of the intermediate chamber 37 flows into the gas sealing chamber 22 through the communication port 40 and tends to go to the outlet 42 on the discharge chamber 45 side. However, a gas flow restricting portion 38 is disposed on the outlet 42 side so as to face the outlet 34 and cover the outlet 34 so that the combustion gas FG can be guided to the communication port 40 side. Therefore, the combustion gas FG from the jet port 34 is regulated in flow by the gas flow regulating unit 38, hardly flows to the outflow port 42 side, and flows into the gas sealing chamber 22 through the communication port 40. . Then, the combustion gas FG flowing into the gas sealing chamber 22 raises the temperature of the pressurized gas PG in the gas sealing chamber 22, so that the pressure of the pressurized gas PG in the gas sealing chamber 22 increases and the combustion gas FG At the same time, a high pressure is applied to the second rupturable plate 43 through the second communication port 41 of the flow passage FR, and the second rupturable plate 43 is ruptured. As a result, as shown in FIG. 5B, the pressurized gas PG that has been heated and raised in the gas sealing chamber 22 is mixed with the combustion gas FG to become a mixed gas CG, and this mixed gas CG becomes the flow passage FR. From the second communication port 41, the gas flows into the discharge chamber 45 through the outlet 2 opened by the rupture of the second rupturable plate 43, and is further discharged from the gas discharge port 47. Then, the pressurized gas PG portion of the mixed gas CG discharged from the gas discharge port 47 is guided by the gas flow restricting portion 38 as compared with the state in which it has flowed into the gas sealing chamber 22 before the operation, and the gas is sealed. Even if the inflator 1 is configured compactly by the combustion gas FG that has flowed into the chamber 22 and the inflator 1 is compact, the mixed gas CG increases in volume and is in a high pressure state. The gas is discharged from the gas discharge port 47, and the output of the inflator 1 is increased.

  Furthermore, the gas flow restricting portion 38 is disposed so as to face the jet port 34 of the gas generation chamber 26 and cover the jet port 34 (in other words, combustion ejected from the jet port 34 of the gas generation chamber 26). The combustion gas FG from the jet port 34 changes the direction of flowing against the gas flow restricting portion 38 (in other words, the shaft is arranged so as to intersect with the flow of the gas FG, in particular, to intersect perpendicularly). The residue contained in the combustion gas FG hits the gas flow restricting portion 38 and hits the gas flow restricting portion 38 because the residue is changed to a direction orthogonal to the axial direction OD so as to be bent at a substantially right angle from the direction along the direction OD. It adheres and is removed. Therefore, the mixed gas CG that passes through the portion of the gas flow restricting portion 38 and is discharged from the gas discharge port 47 is discharged in a state where the residue is reduced. As a result, for example, when the hybrid inflator 1 is used in an airbag device that inflates an airbag, it is possible to prevent a high-temperature residue from flowing into the airbag.

  Therefore, in the inflator 1 of 1st Embodiment, while being able to comprise with high output and a compact, the outflow of a residue can also be suppressed.

  And in the inflator 1 of 1st Embodiment, the gas flow control part 38 is arrange | positioned in the downstream of the flow of the combustion gas FG from the communicating port 40 so that the whole area of the inner peripheral side of the intermediate chamber 37 may be plugged up. The closing plate 39 is formed. The intermediate chamber 37 is provided with a second communication port 41 communicating with the gas sealing chamber 22 at a position closer to the outlet 42 side than the gas flow regulating portion 38, and allows the pressurized gas PG in the gas sealing chamber 22 to flow. A flow passage FR that can flow out to the discharge chamber 45 through the outlet 42 is secured.

  Therefore, in this first embodiment, the combustion gas FG from the gas generation chamber 26 flows entirely into the gas sealing chamber 22 through the communication port 40 by the closing plate 39 as the gas flow regulating portion 38. The pressurized gas PG can be raised in temperature stably. Then, the mixed gas CG of the heated pressurized gas PG and the combustion gas FG flows into the outlet 42 side (downstream chamber 37b) of the intermediate chamber 37 through the flow passage FR including the second communication port 41. Then, the gas flows into the discharge chamber 45 through the opened outlet 42 and is discharged from the gas discharge port 47.

  Of course, the combustion gas FG strikes the gas flow restricting portion 38, causes the residue to adhere to the gas flow restricting portion 38, and actively flows to the discharge chamber 45 side through the gas sealing chamber 22 so as to detour. Therefore, it is possible to effectively raise the temperature and pressure of the pressurized gas PG in the gas sealing chamber 22 while depositing residues in the gas sealing chamber 22. As a result, in the inflator 1 of the first embodiment, it is possible to more effectively reduce the residue and increase the temperature and pressure of the pressurized gas PG.

  In the first embodiment, the gas flow restricting portion 38 is configured by a disc-shaped closing plate 39 that faces the jet port 34 and covers the jet port 34 so as to completely close the intermediate chamber 37. Was illustrated. However, as in the inflator 1A of the second embodiment shown in FIGS. 6 to 9, the gas flow restricting portion 38A itself maintains the function of guiding the combustion gas FG to the communication port 40 side, and the pressure is increased. The function of the flow path FR which can flow gas PG to the outflow port 42 side is ensured, and you may be comprised. In the case of the second embodiment, the gas flow restricting portion 38A passes through the combustion gas FG and the pressurized gas PG so that the residue in the combustion gas FG can be captured so as to be disposed with the flow passage FR. It consists of a possible filter 49.

  As shown in FIGS. 6 to 9, the inflator 1 </ b> A according to the second embodiment has an annular gas sealing chamber 22 disposed on the outer peripheral side in the cylindrical housing 3 as in the first embodiment. The gas generation chamber 26, the intermediate chamber 37, and the discharge chamber 45 are arranged in series from the bottom to the top inside the gas sealing chamber 22. The housing 3 includes a ceiling side portion 4, a bottom side portion 11, an inner cylinder portion 15, and a cap 20 each made of a metal material such as steel.

  Similar to the first embodiment, the upper ceiling side portion 4 includes a disk-shaped top plate portion 5 and a peripheral wall portion extending in a cylindrical shape from the outer peripheral edge of the top plate portion 5 to the bottom side portion 11 side. 8. In the center of the top plate part 5, a projecting part 6 projecting upward in a columnar shape is arranged. The projecting portion 6 constitutes the outer wall of the discharge chamber 45, and a plurality of gas discharge ports opened in a circular shape for discharging the mixed gas CG in a direction orthogonal to the axis O of the housing 3 on the cylindrical peripheral wall 6 a. 47 is arranged. In the case of the embodiment, four gas discharge ports 47 are arranged at equal intervals along the circumferential direction around the axis O of the housing 3. A flange portion 9 protruding outward is disposed at the lower end of the peripheral wall portion 8, and an attachment hole 9 a for attaching the inflator 1 to a predetermined location is disposed in the flange portion 9.

  The bottom side portion 11 on the lower side includes an annular bottom plate portion 12 and a cylindrical peripheral wall portion 13 that extends upward from the outer edge of the bottom plate portion 12 to the top plate portion 5 side. An upper end 13 a of the peripheral wall portion 13 is welded to a lower end 8 a of the peripheral wall portion 8 of the ceiling side portion 4. An insertion hole 12a is opened at the center of the bottom plate part 12, and the inner cylinder part 15 is inserted.

  The inner cylindrical portion 15 has a disk-shaped intermediate wall portion 18 formed on the inner peripheral side so as to close the inner peripheral side of the inner cylindrical portion 15. The inner cylinder portion 15 includes an inner bottom side wall portion 16 on the bottom plate portion 12 side and an inner top side wall portion 17 on the top plate portion 5 side with the intermediate wall portion 18 therebetween. The intermediate wall 18 is a part that divides the gas generation chamber 26 and the intermediate chamber 37, and a jet port 34 that is opened in a circular shape is formed at the center. The inner bottom side wall portion 16 constitutes a cylindrical partition wall that partitions the gas generation chamber 26 and the gas sealing chamber 22, and the inner ceiling side wall portion 17 has a cylindrical shape that partitions the gas sealing chamber 22 and the intermediate chamber 37. The partition wall is configured. The inner ceiling side wall portion 17 has a plurality of communication ports 40 opened in a circular shape at positions closer to the intermediate wall portion 18 than the top plate portion 5. Eight communication ports 40 are arranged radially about the axis O of the housing 3, and the total opening area of the eight communication ports 40 is the opening area of the four gas discharge ports 47. It is set to be larger than the sum of.

  The inner cylinder portion 15 welds the tip 15 a to the lower surface 5 a of the top plate portion 5 of the ceiling side portion 4, and inserts an intermediate portion in the axial direction of the inner bottom side wall portion 16 in the bottom plate portion 12 of the bottom side portion 11. It welds with respect to the inner periphery of 12a.

  A gas sealing chamber 22 in which a pressurized gas PG such as argon is sealed is arranged in an annular shape so as to surround the periphery of the intermediate chamber 37. Specifically, the gas sealing chamber 22 has an inner and outer periphery between the top plate portion 5 of the ceiling side portion 4 and the bottom plate portion 12 of the bottom side portion 11, and the inner cylinder portion 15 and the peripheral wall portions 8 and 13. Are surrounded by.

  Although not shown in FIG. 6, the top plate portion 5 is filled with the sealing port 23 opened to seal the pressurized gas PG in the gas sealing chamber 22, and after the pressurized gas PG is sealed, A sealing pin 24 that closes the sealing port 23 is disposed (see FIG. 10).

  The gas generation chamber 26 is formed by being surrounded by an inner bottom side wall portion 16 below the intermediate wall portion 18 in the inner cylinder portion 15, and a gas generator 27 is disposed in the inner bottom side wall portion 16, It is formed by screwing the female screw portion 20 a into the male screw portion 16 a of the bottom side wall portion 16 and fastening the cap 20 to the inner bottom side wall portion 16. At that time, the holder 30 is pressed by the cap 20, and the gas generator 27 is disposed and fixed in the gas generation chamber 26. In the gas generator 27, as in the first embodiment, a gas generating agent 29 that generates a combustion gas FG such as nitrogen gas containing a flame at the time of combustion is stored in a cup 31 made of aluminum alloy or the like. In addition, a squib 28 for igniting the gas generating agent 29 and a cup 31 are assembled to a disc-shaped holder 30. A plurality of triangular plate-shaped flaps 32a (see FIG. 9A) that are pushed open by the combustion gas FG generated by burning the gas generating agent 29 are disposed on the ceiling wall 32 of the cup 31 away from the holder 30. Yes. In the periphery of the flap 32a, unillustrated portions to be broken, which are not shown, are arranged radially, and each flap 32a is configured to open from the axis O side of the housing 3 toward the periphery.

  The ejection port 34 provided in the intermediate wall 18 is closed by a first rupturable plate 35 made of a metal plate or the like, and the first rupturable plate 35 has its shock wave or pressure when the combustion gas FG is generated. Or ruptured by heat or the like.

  Similarly to the first embodiment, the intermediate chamber 37 is formed between the top plate portion 5 and the intermediate wall portion 18, in other words, between the discharge chamber 45 and the gas generation chamber 26, at the inner ceiling side wall portion 17. It is arranged at the enclosed part. As described above, the intermediate chamber 37 communicates with the gas sealing chamber 22 through the communication port 40.

  In the intermediate chamber 37, in the flow path of the combustion gas FG from the outlet 34 to the outlet 42 on the discharge chamber 45 side, at the downstream side of the flow of the combustion gas FG from the communication port 40, A filter 49 serving as the gas flow restricting portion 38 is disposed so as to face the ejection port 34 and cover the ejection port 34. This filter 49 is fixed to the inner peripheral surface 17a of the inner ceiling side wall portion 17 so as to be orthogonal to the axial center O of the housing 3 so as to be orthogonal to the flow of the combustion gas FG and to be a resistance of the flow of the combustion gas FG. Has been. This filter 49 is also used in a general-purpose pyro-type inflator, and can capture residues in the combustion gas FG when passing, while bending a long and slender metal wire such as a stainless steel wire or a strip, It is formed by compression molding into a plate-like block shape.

  Similarly to the first embodiment, the discharge chamber 45 is provided in the protruding portion 6 of the top plate portion 5 and includes a plurality (four in the embodiment) of gas discharge ports 47 as described above. Has been. The discharge chamber 45 is provided with an outlet 42 that is closed by a metal second rupturable plate 43 between the discharge chamber 45 and the intermediate chamber 37. The outflow port 42 is disposed on the inner peripheral edge of the protruding portion 6 of the top plate portion 5, and when the pressure of the mixed gas CG of the pressurized gas PG and the combustion gas FG heated and increased is raised, the second rupturable plate 43. Opens when it bursts.

  In the second embodiment, as in the first embodiment, the second rupturable plate 43 causes the combustion gas FG generated in the gas generating chamber 26 to burst the first rupturable plate 35 and flow into the intermediate chamber 37. Even so, it is set not to burst immediately. In other words, the second rupturable plate 43 is separated from the intermediate wall 18 so that the combustion gas FG flowing into the intermediate chamber 37 can raise the temperature and pressure of the pressurized gas PG in the gas sealing chamber 22 through the communication port 40. The strength is set in consideration of the distance L, the wall thickness t, the pressure loss of the combustion gas FG due to the filter 49, and the like. Also in the second embodiment, the second rupturable plate 43 is set so as to burst when the inside of the intermediate chamber 37 reaches 90 MPa or more. Incidentally, the pressurized gas PG sealed in the gas sealing chamber 22 of the inflator 1A is set to 40 MPa as in the first embodiment.

  In the inflator 1A of the second embodiment, during operation, first, as shown in FIG. 6 and FIG. 9A, the gas generating agent 29 in the gas generating chamber 26 is ignited by the ignition of the squib 28 and burned. The combustion gas FG is generated. Then, the first rupturable plate 35 is ruptured by the shock wave, pressure, heat of the combustion gas FG, or the collision of the flap 32a to be pushed open, and the jet port 34 is opened. Therefore, first, the combustion gas FG flows from the gas generation chamber 26 into the intermediate chamber 37 through the ejection port 34. The combustion gas FG that has flowed into the intermediate chamber 37 flows into the gas sealing chamber 22 through the communication port 40 and tends to go to the outlet 42 on the discharge chamber 45 side. However, a filter 49 serving as a gas flow restricting portion 38A is disposed on the outlet 42 side so as to be able to guide the combustion gas FG to the communication port 40 side so as to face the outlet 34 and cover the outlet 34. Has been. Therefore, the combustion gas FG from the jet port 34 is restricted in flow by the gas flow restricting portion 38 </ b> A, becomes difficult to flow to the outflow port 42 side, and flows into the gas sealing chamber 22 through the communication port 40. . Then, the combustion gas FG flowing into the gas sealing chamber 22 raises the temperature of the pressurized gas PG in the gas sealing chamber 22, so that the pressure of the pressurized gas PG in the gas sealing chamber 22 increases and the combustion gas FG At the same time, a high pressure is applied to the second rupturable plate 43 through the flow passage FR (a large number of holes in the filter 49), and the second rupturable plate 43 is ruptured. As a result, the pressurized gas PG that has been heated and raised in the gas sealing chamber 22 is mixed with the combustion gas FG to become a mixed gas CG, and this mixed gas CG passes from the flow passage FR of the filter 49 to the second rupturable plate. The gas flows into the discharge chamber 45 through the outlet 42 opened by the rupture of 43, and is further discharged from the gas discharge port 47. Then, the pressurized gas PG portion of the mixed gas CG discharged from the gas discharge port 47 is guided by the gas flow restricting portion 38A as compared with the state in which it has flowed into the gas sealing chamber 22 before the operation, and the gas is sealed. Even if the inflator 1A is compactly configured by the combustion gas FG flowing into the chamber 22 and the inflator 1A is configured compactly, the mixed gas CG increases in volume and is in a high pressure state. The gas is discharged from the gas discharge port 47, and the output of the inflator 1A is increased.

  Further, the gas flow restricting portion 38A is disposed so as to face the jet outlet 34 of the gas generation chamber 26 so as to cover the jet outlet 34, and the combustion gas FG from the jet outlet 34 hits the gas flow restricting portion 38A. Since the flow direction is changed, the residue contained in the combustion gas FG hits the gas flow restricting portion 38A, adheres to the gas flow restricting portion 38A, and is removed. Therefore, the mixed gas CG discharged from the gas discharge port 47 through the portion of the gas flow restricting portion 38A is discharged in a state in which the residue is reduced, and the same operations and effects as in the first embodiment. Can be obtained.

  And in the inflator 1 of 2nd Embodiment, the gas flow control part 38 is comprised from the filter 49 which can capture | acquire the residue in combustion gas FG and can pass combustion gas FG and pressurized gas PG. . Therefore, in this inflator 1, the entire amount of the mixed gas CG heading toward the discharge chamber 45 finally passes through the filter 49, and at that time, the filter 49 can further capture the residue, and further , Residue outflow can be suppressed.

  In addition, in 2nd Embodiment, although the case where the filter 49 was utilized was shown as 38 A of gas flow control parts, gas flow control part 38B is used like the inflator 1B of 3rd Embodiment shown to FIG. A through-hole 60 that forms the flow passage FR as an opening smaller than the jet port 34 may be provided, and may be constituted by a perforated closing plate 59 that closes the inner periphery of the intermediate chamber 37. This inflator 1B differs from the second embodiment only in that a perforated closing plate 59 is used instead of the filter 49, and other parts and members are the same as those in the second embodiment. The same parts and members are denoted by the same reference numerals as those of the second embodiment, and the description thereof is omitted.

  Also in the inflator 1B of the third embodiment, during operation, as shown in FIG. 10 and FIG. 11A, the gas generating agent 29 in the gas generating chamber 26 is ignited and burned by ignition of the squib 28, and the combustion gas FG is generated, and with this generation, the first rupturable plate 35 is ruptured, and the jet port 34 is opened. Even if the combustion gas FG flows into the intermediate chamber 37 from the gas generation chamber 26 through the jet port 34 and goes to the outlet 42 on the discharge chamber 45 side, the combustion gas FG is introduced into the intermediate chamber 37. Since the perforated closing plate 59 serving as the gas flow restricting portion 38B guided to the communication port 40 side is disposed, the combustion gas FG hardly flows to the outflow port 42 side. 22 will flow. Therefore, the pressurized gas PG in the gas sealing chamber 22 is heated and pressurized by the combustion gas FG that has flowed into the gas sealing chamber 22, and a high pressure is applied to the second rupturable plate 43. The second rupturable plate 43 is ruptured as shown in FIG. As a result, the pressurized gas PG heated and raised in the gas sealing chamber 22 flows into the intermediate chamber 37 from the gas sealing chamber 22 through the communication port 40 and is mixed with the combustion gas FG to become a mixed gas CG. This mixed gas CG flows into the discharge chamber 45 through the through hole 60 of the perforated blocking plate 59, through the outlet 42 opened by the rupture of the second rupturable plate 43, and further discharged from the gas discharge port 47. Will be. Then, the pressurized gas PG portion of the mixed gas CG discharged from the gas discharge port 47 is compared with the state in which the pressurized gas PG is flowing into the gas sealing chamber 22 before the operation, and the gas flow regulating portion 38B causes the inside of the gas sealing chamber 22 to Even if the inflator 1B is compactly configured by the combustion gas FG that has flown into the combustion gas FG, the mixed gas CG increases its volume and is in a high pressure state with a gas discharge port. 47, and the output of the inflator 1B is increased.

  Further, the perforated closing plate 59 of the gas flow restricting portion 38B is disposed so as to face the jet port 34 of the gas generation chamber 26 so as to cover the jet port 34, in other words, the jet of the gas generation chamber 26. It is arranged so as to intersect with the flow of the combustion gas FG ejected from the outlet 34 (particularly, an orthogonal intersection), and the residue contained in the combustion gas FG hits the perforated closing plate 59 and enters the perforated closing plate 59. Since it adheres and is removed, the mixed gas CG that is discharged from the gas discharge port 47 through the portion of the perforated blocking plate 59 serving as the gas flow regulating portion 38B is discharged in a state in which the residue is reduced. Thus, the same actions and effects as those of the second embodiment can be obtained.

  Furthermore, in the third embodiment, since the size and number of the through holes 60 provided in the perforated blocking plate 59 can be adjusted arbitrarily, adjustment of the flow rate characteristics of the mixed gas CG discharged from the discharge chamber 45, for example, the mixed gas CG Can be discharged over a long time, or can be adjusted such that a large amount of the mixed gas CG is discharged in a short time.

  Furthermore, even when the gas flow restricting portions 38A and 38B themselves are arranged so as to be provided with the flow passage FR like the inflators 1A and 11 of the second and third embodiments, A second communication port (second communication port) 41 that communicates with the gas sealing chamber 22 may be provided at a position closer to the outflow port 42 side than the gas flow restriction portions 38A and 38B.

  For example, in the inflator 1C of the fourth embodiment shown in FIGS. 12 and 13, the gas flow restricting portion 38C is formed from the same filter 49 as that of the second embodiment, and the intermediate chamber 37 has a gas flow restricting portion 38C. Eight second communication ports 41 are formed at positions close to the outflow port 42 side, as in the first embodiment.

  Also in the inflator 1C of the fourth embodiment, during operation, as shown in FIG. 12 and FIG. 13A, the gas generating agent 29 in the gas generating chamber 26 is ignited and burned by ignition of the squib 28, and the combustion gas FG is generated, and with this generation, the first rupturable plate 35 is ruptured, and the jet port 34 is opened. And even if the combustion gas FG flows into the intermediate chamber 37 from the gas generation chamber 26 through the jet port 34 and goes to the outlet 42 on the discharge chamber 45 side, the combustion gas FG is guided to the communication port 40 side. Since the filter 49 serving as the gas flow restricting portion 38B is disposed, the combustion gas FG hardly flows to the outlet 42 side, and passes through the communication port 40 on the upstream chamber 37a side of the intermediate chamber 37, and then the gas sealing chamber 22. It will flow inside. Therefore, the pressurized gas PG in the gas sealing chamber 22 is heated and pressurized by the combustion gas FG flowing into the gas sealing chamber 22, passes through the second communication port 41 on the downstream chamber 37 b side of the intermediate chamber 37, and then reaches the second burst. By applying a high pressure to the plate 43, the second rupturable plate 43 is ruptured as shown in FIG. 13B. As a result, the pressurized gas PG heated and raised in the gas sealing chamber 22 flows from the gas sealing chamber 22 into the downstream chamber 37b of the intermediate chamber 37 through the second communication port 41, and is mixed with the combustion gas FG. The mixed gas CG flows into the discharge chamber 45 through the outlet 42 opened by the rupture of the second rupturable plate 43, and is further discharged from the gas discharge port 47. Then, the pressurized gas PG portion of the mixed gas CG discharged from the gas discharge port 47 flows into the gas sealing chamber 22 by the filter 49 as compared with the state in which it has flowed into the gas sealing chamber 22 before the operation. Even if the temperature of the inflator 1C is positively increased by the combustion gas FG and the inflator 1C is compact, the mixed gas CG is increased in volume and discharged from the gas discharge port 47 in a high pressure state. As a result, the output of the inflator 1C is increased.

  Further, the filter 49 as the gas flow restricting portion 38C is disposed so as to intersect perpendicularly with the flow of the combustion gas FG ejected from the ejection port 34 of the gas generation chamber 26, and the residue contained in the combustion gas FG. Since the gas hits the filter 49 and attaches to the filter 49 or is captured and removed when passing through the filter 49, the gas is discharged through the second communication port 41 or through the filter 49. The mixed gas CG discharged from the outlet 47 is discharged in a state where the residue is reduced, and the same actions and effects as in the second and third embodiments can be obtained.

  Furthermore, in addition, in the fourth embodiment, when the combustion gas FG is ejected from the ejection port 34 of the gas generation chamber 26, the combustion gas FG is moved to the first stage on the side close to the ejection port 34 by the gas flow regulating portion 38C. The gas flows into the gas sealing chamber 22 through the communication port 40, and then flows into the intermediate chamber 37 from the second communication port 41 at the second stage away from the jet port 34, and flows toward the discharge chamber 45. Can be secured. Therefore, the combustion gas FG strikes the gas flow restricting portion 38C, adheres the residue to the gas flow restricting portion 38C, and actively flows to the discharge chamber 45 side through the gas sealing chamber 22 so as to bypass. Therefore, even in the gas sealing chamber 22, it is possible to increase the temperature and pressure of the pressurized gas PG in the gas sealing chamber 22 while attaching the residue to the inner peripheral surface 22 a, thereby reducing the residue and the pressurized gas PG. Can be effectively achieved.

  In the fourth embodiment, the filter 49 is used as the gas flow restricting portion 38C. However, the perforated closing plate 59 provided with the through hole 60 of the third embodiment is used as the gas flow restricting portion 38C. , May be arranged.

  Further, in the fourth embodiment, the gas flow of the second stage filter 49 and the perforated blocking plate 59 provided with the flow passage FR on the outlet 42 side of the second communication port 41 of the second stage. You may arrange | position a control part.

  Furthermore, multistage filters 49 and perforated closing plates 59 as gas flow restricting portions 38 are appropriately combined and arranged on the inner peripheral side from the outlet 34 to the outlet 42 in the intermediate chamber 37. May be.

1 ... (hybrid) inflator,
22 ... Gas filled chamber,
26 ... Gas generation chamber,
28 ... Squibb,
29 ... Gas generating agent,
34 ... spout
35 ... the first rupturable plate,
37 ... Intermediate room,
38, 38A, 38B, 38C ... gas flow regulating part,
39 ... Occlusion plate,
40 ... Communication entrance,
41 ... Second communication port,
42 ... Outlet,
43 ... the second rupturable plate,
45 ... discharge chamber,
47 ... Gas outlet,
49 ... filter,
59 ... perforated obstruction plate,
60 ... through hole,
RF ... flow path,
PG ... pressurized gas,
FG ... Combustion gas,
CG: Mixed gas.

Claims (5)

A hybrid inflator configured to discharge a mixed gas of combustion gas generated by ignition of a squib and sealed pressurized gas during operation from a gas discharge port,
A gas generating chamber containing a gas generating agent for generating the combustion gas and the squib;
A discharge chamber having the gas discharge port;
The gas generation chamber and the discharge chamber are arranged in series, communicated with the gas generation chamber through a jet port closed with a first rupturable plate, and An intermediate chamber communicated with the discharge chamber via an outlet closed by the second rupturable plate;
A gas-filled chamber that is disposed around the intermediate chamber with the pressurized gas sealed therein and communicated with the intermediate chamber via a communication port;
Configured with
The intermediate chamber is
Ensuring a flow passage through which the pressurized gas in the gas enclosure chamber can flow out to the discharge chamber via the outlet;
The combustion gas from the gas generation chamber can be guided to the communication port side, and the gas flow is performed on the downstream side of the flow of the combustion gas from the communication port so as to face the injection port and cover the injection port. A hybrid inflator characterized in that a regulating portion is provided. The gas flow restricting portion is formed from a closing plate disposed on the downstream side of the flow of the combustion gas from the communication port so as to block the entire inner peripheral side of the intermediate chamber.
A second communication port communicating with the gas sealing chamber is provided at a position where the intermediate chamber is closer to the outlet side than the gas flow regulating portion, and the flow passage is disposed. The hybrid inflator according to claim 1.   The gas flow restricting unit is configured by a filter that can capture the residue in the combustion gas and can pass the combustion gas and the pressurized gas so as to be disposed with the flow passage. The hybrid inflator according to claim 1, wherein   The gas flow restricting portion is configured by a perforated blocking plate that is provided with a through hole that forms the flow passage as an opening smaller than the jet outlet and blocks the inner periphery of the intermediate chamber. Item 2. The hybrid inflator according to Item 1.   The said intermediate | middle chamber is provided with the 2nd communicating port connected to the said gas enclosure chamber in the position which approached the said outflow port side from the said gas flow control part, It is comprised, It is characterized by the above-mentioned. The hybrid inflator according to claim 4.

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