JP2005212566A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device capable of changing an airbag in an optimum state according to the magnitude of a shock in a collision and the build of an occupant. <P>SOLUTION: The airbag device 10 to change the shape, the size, the internal pressure or the like of an airbag has two or more bags 11 and 12, an inflator 14 having at least one gas generation unit corresponding to the bags 11 and 12 with a gas outlet formed in each gas generation unit, a gas distribution means 15 to distribute gas from the gas outlet of each gas generation unit of the inflator 14 to the corresponding bags, and a gas control means 13 which forms a bulkhead between the bag 11 to be developed first out of the two or more bags 11 and 12 and the other bags 12, and also forms a feed passage of gas to the bag 11 to be developed first. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an airbag device that changes to an optimal bag according to the severity of a collision and the physique of an occupant.

In recent years, an airbag device has been mounted on many vehicles as an occupant protection device. In general, in an airbag device, the size and shape of a deployed bag are constant. However, depending on the magnitude of impact at the time of a vehicle collision, the occupant's physique, etc., there is an appropriate bag size and shape for the occupant, and it is desired to change the size and shape of the bag. Therefore, various airbag devices that can change the size and shape of the bag have been developed (see Patent Document 1).
JP 2000-153746 A JP 2003-276554 A JP 2001-106008 A JP-A-10-81191 JP-A-11-321506 JP-A-8-911167

  However, the conventional airbag device can change the shape by a plurality of bags or change the size of a bag of a fixed shape, but the shape, thickness (deployment height), pressure receiving area of the bag The internal pressure cannot be changed comprehensively. For this reason, the deployed bag may not have the optimum size, thickness, pressure receiving area, and internal pressure for protecting the passenger according to the magnitude of the impact at the time of collision and the occupant's physique.

  Then, this invention makes it a subject to provide the airbag apparatus which can change a bag to the optimal state according to the magnitude | size of the impact at the time of a collision, and a passenger | crew's physique.

  An airbag apparatus according to the present invention includes two or more bags, an inflator having one or more gas generating portions corresponding to each bag, and each gas generating portion having a gas outlet, and an inflator The gas distribution means for distributing the gas from the gas outlet of each gas generating section to the corresponding bag, and the partition between the first and second bags of the two or more bags and the other bag. And a gas control means serving as a gas supply passage to the bag to be deployed second.

  The airbag device includes two or more bags, and includes an inflator having one or more gas generation units corresponding to the plurality of bags. Depending on the shape, size, and arrangement of the plurality of bags, the shape, thickness, and pressure receiving area of the entire bag can be changed. The inflator is provided with a gas outlet at each gas generation part. Furthermore, the airbag device includes gas distribution means for generating gas in the gas generation unit and distributing the gas flowing out from the gas outlet of the gas generation unit to the bags corresponding to the gas generation unit. First, in an airbag device, when a bag is deployed due to a vehicle collision or the like, gas is generated at a gas generation unit corresponding to the bag to be deployed first, and the gas flowing out from the gas outlet of the gas generation unit is gas distributed. The gas is supplied to the first distributed bag through the gas control means. Furthermore, in the airbag device, when it is necessary to deploy the second bag according to the magnitude of the impact at the time of the collision and the occupant's physique, gas is generated at the gas generation unit corresponding to the second bag to be deployed, The gas flowing out from the gas outlet of the gas generating section is distributed by the gas distribution means, and the gas is supplied to the second bag to be deployed. In the case where three or more bags are provided, the airbag device supplies gas to the third and subsequent bags that are deployed as described above. Thus, in this airbag device, the thickness, pressure receiving area, and shape of the entire bag can be changed by sequentially deploying two or more bags. Also, in the airbag device, the number of gas generating parts of the inflator is set appropriately according to the bag, and the number of gas generating parts that generate gas is controlled according to the magnitude of impact at the time of collision and the occupant's physique By doing so, the internal pressure of each bag can be appropriately changed. Therefore, in this airbag device, the shape, thickness, pressure-receiving area, internal pressure, etc. of the bag can be changed comprehensively according to the magnitude of the impact at the time of collision and the occupant's physique, so that the bag is in an optimal state. can do. Further, in the airbag device, the gas control means can supply gas only to the first bag to be deployed and reliably deploy only the first bag.

  The airbag apparatus according to the present invention includes two or more bags, and an inflator having one or more gas generating portions corresponding to each bag, each gas generating portion having a gas outlet. Of the two or more bags, it becomes a partition wall between the first deployed bag and the other bag, and serves as a gas supply passage to the first deployed bag. Gas control means for regulating the deployment height, and adjusting the deployment height by the gas control means according to the difference between the internal pressure of the bag to be deployed first and the internal pressure of the bag other than the bag to be deployed first And

  This airbag device includes two or more bags and an inflator similar to the airbag device described above. First, in the airbag device, when the bag is deployed due to a vehicle collision or the like, gas is generated at the gas generation unit corresponding to the bag to be deployed first, and the gas flowing out from the gas outlet of the gas generation unit is gas controlled. Gas is supplied to the first deployed bag through the means. Furthermore, in the airbag device, when it is necessary to deploy the second bag according to the magnitude of the impact at the time of the collision and the occupant's physique, gas is generated at the gas generation unit corresponding to the second bag to be deployed, The gas is supplied to the bag in which the gas that has flowed out from the gas outlet of the gas generating section is deployed second. In the case where three or more bags are provided, the airbag device supplies gas to the third and subsequent bags that are deployed as described above. At this time, the development height by the gas control means serving as the partition wall is adjusted by making a difference between the internal pressure of the first bag and the internal pressure of the bag other than the first by the setting in each gas generating part of the inflator. The unfolding height (thickness) of bags other than the first is regulated. As described above, in this airbag device, the bag can be changed to an optimum state in accordance with the magnitude of impact at the time of collision and the occupant's physique, as in the above-described airbag device. Moreover, in an airbag apparatus, the expansion | deployment height of a bag can be controlled to appropriate height by adjusting the internal pressure difference between bags.

  The airbag apparatus according to the present invention includes two or more bags, and an inflator having one or more gas generating portions corresponding to each bag, each gas generating portion having a gas outlet. Gas control means that serves as a partition wall between the first and second bags of the plurality of bags and serves as a gas supply passage to the first bag to be deployed is deployed first. The bag is provided with a vent hole, and gas is caused to flow out from a bag that is first developed by the vent hole to a bag other than the bag that is first deployed.

  This airbag device includes two or more bags and an inflator similar to the airbag device described above, and a vent hole is provided in the bag that is first deployed. First, in the airbag device, gas is supplied to the bag to be deployed first, as described above. In the first bag, when the internal pressure becomes a predetermined pressure or more, gas flows out from the vent hole to another bag. Further, in the airbag device, gas is supplied to the second and subsequent bags that are deployed as described above. In this airbag device, the bag can be changed to an optimum state according to the magnitude of impact at the time of collision and the physique of the occupant, as in the above-described airbag device. Further, in this airbag device, gas can flow out from the first bag to the other bag by the vent hole, so that the reaction force of the first bag does not increase more than necessary, and the gas is released into the atmosphere. Not.

  In the airbag apparatus according to the present invention, the outflow of gas from the bag first deployed by the vent hole to the bag other than the first deployed bag is allowed, and the first from the bag other than the first deployed bag. It is good also as a structure provided with the vent hole one-way cover which interrupts | blocks the outflow of the gas to the bag to expand | deploy to 1.

  In this airbag apparatus, the vent hole one-way cover allows gas to flow only in one direction from the first bag to the other bags in the vent hole. Therefore, in the airbag device, gas does not flow out from the bag other than the first to the first bag, and the reaction force of the first bag does not increase.

  The airbag apparatus according to the present invention may include a gas distribution unit that distributes the gas from the gas outlet of each gas generation unit of the inflator to the corresponding bag.

  The airbag device further includes gas distribution means for distributing the gas flowing out from the gas outlet of the gas generation section to the bag corresponding to the gas generation section, and the gas distribution means generates the gas at the gas generation section. Distribute the gas to the bag corresponding to the gas generator.

  In the airbag apparatus of the present invention, the gas distribution means may be configured such that a coolant and / or a filter is provided in the gas flow path.

  In this air bag apparatus, the gas distribution means is provided with a coolant for cooling the gas and / or a filter for removing fine particles (burn residue etc.) contained in the gas. There is no need to provide them, and the inflator can be miniaturized.

  In the airbag device of the present invention, the gas control means is formed into a bag shape having an opening portion formed by folding a cylindrical cloth inside, and the opening portion is sewn with a thread to form a closed space. A gas outlet or a gas distribution means of the gas generating unit corresponding to the bag other than the first bag to be deployed is connected to the opening by a conduit. When a bag other than the first bag to be deployed is deployed, a gas may be generated at a gas generation unit corresponding to the bag other than the first deployed bag, and the thread that stitches the opening may be broken.

  In this airbag device, a cylindrical cloth serving as a gas supply passage to the bag to be deployed first is disposed, and folded into the bag along the circumferential direction of the cylindrical cloth to form a bag. The gas control means is configured in a state in which the shape-shaped opening is sealed with a thread and sealed. Therefore, as the gas control means, a bag-like sealed closed space is formed along the circumferential direction inside the cylindrical cloth, a gas supply passage is formed inside the closed space, and the closed space An opening is formed along the outer periphery, and a bag other than the first is disposed outside the closed space. And the conduit | pipe for flowing the gas from the gas outlet or the gas distribution means of the gas generation part corresponding to bags other than the 1st is attached to the opening part of this gas control means. In the airbag device, when a bag other than the first one is deployed, gas is generated in a gas generation unit corresponding to the bag, and gas is supplied into the closed space through a conduit. As a result, the closed space is filled with gas, the internal pressure becomes extremely high, and the yarn is easily broken. When the yarn breaks, the opening opens. Therefore, the gas from the conduit is supplied to the bag other than the first bag, and the bag other than the first bag supplied with the gas is developed. In this way, the gas control means can be easily constituted by the cylindrical cloth and thread.

  The inflator may be composed of one inflator in which a plurality of gas generation units are integrally formed, or may be composed of a plurality of inflators in which the plurality of gas generation units are formed separately. The gas distribution means may distribute the gas from all the gas generation units among the plurality of gas generation units, or may distribute the gas from some of the gas generation units. When distributing the gas from some gas generation parts, the gas from the remaining gas generation parts is supplied to a bag from an inflator. Further, the gas distribution means may distribute the gas directly into the bag or may distribute the gas via another member such as a conduit.

  According to the present invention, the shape, thickness, pressure-receiving area, internal pressure, etc. of the bag can be changed comprehensively according to the magnitude of the impact at the time of collision and the occupant's physique, and the bag can be in an optimal state. I can write.

  Hereinafter, an embodiment of an airbag device according to the present invention will be described with reference to the drawings.

  The airbag apparatus according to the present embodiment includes two bags for changing the shape, thickness, and pressure receiving area of the entire bag, and two gases are generated in each bag to change the internal pressure of each bag. An inflator having a chamber is provided. In this embodiment, there are three forms, the first embodiment is a basic configuration, the second embodiment is a configuration in which gas is directly supplied from the inflator to the first bag, The third embodiment is configured to include a vent hole and a vent hole one-way cover.

  Note that the airbag apparatus according to the first to third embodiments has substantially the same configuration for the inflator control unit for controlling the inflator, and performs the same control for the control. The point will be described later in common.

  With reference to FIGS. 1-9, the airbag apparatus 10 which concerns on 1st Embodiment is demonstrated. FIG. 1 is a cross-sectional view in the first bag deployment state showing the configuration of the airbag apparatus according to the first embodiment. FIG. 2 is a cross-sectional view showing the configuration of the airbag apparatus according to the first embodiment in an all-bag deployed state. FIG. 3 is an enlarged view around the inflator and the gas distribution ring in FIG. FIG. 4 is a plan view of the control cylinder and conduit of FIG. 5 is a cross-sectional view taken along line AA in FIG. 6 is a cross-sectional view taken along line BB in FIG. FIG. 7 is a perspective view of the gas distribution ring of FIG. FIG. 8 is a cross-sectional plan view of the gas distribution ring of FIG. FIG. 9 is a plan sectional view of the inflator shown in FIG.

  In the airbag apparatus 10, the 1st bag 11 is arrange | positioned at the passenger | crew side, and the 2nd bag 12 is arrange | positioned at the inflator side. In the airbag device 10, the shape, thickness, and pressure receiving area of the entire bag are changed by the two bags 11 and 12. In the airbag device 10, the control cylinder 13 is disposed on the inflator side of the first bag 11 and on the inner side of the second bag 12. Further, in the airbag device 10, a gas distribution ring 15 is disposed on the outer periphery of the inflator 14, and conduits 16 and 16 are connected to the gas distribution ring 15. In the airbag device 10, two gas generation chambers are provided in the inflator 14 corresponding to each bag, and the internal pressures of the first bag 11 and the second bag 12 are changed.

  The first bag 11 includes an inflator side bag 11a and an occupant side bag 11b. The inflator side bag 11a has a large-diameter circular shape, and an opening 11c serving as a gas inlet is opened at the center. The occupant side bag 11b also has a large-diameter circular shape. The inflator-side bag 11a and the occupant-side bag 11b are joined together at their outer edges and stitched with a suture thread 11d. The first bag 11 has a higher deployment height (thickness) and a smaller diameter (small pressure receiving area) than the second bag 12. The first bag 11 is the bag that is deployed first, and first firmly receives the occupant and absorbs the impact of the collision. In particular, the first bag 11 can catch an occupant who has moved straight and can absorb a large impact.

  Two straps 11e and 11e are provided inside the first bag 11 in order to regulate the deployed height. The strap 11e is made of cloth and has a strip shape. The straps 11e and 11e are respectively disposed at diagonal positions outside the opening 11c. One end of each strap 11e is stitched to the inflator bag 11a by a suture thread 11f. The other end of each strap 11e is stitched to the occupant side bag 11b with a suture thread 11g.

  The 2nd bag 12 is a cylindrical bag from which the magnitude | size of the opening parts 12a and 12b of both ends differs. The opening 12 a on the inflator 14 side has a diameter slightly larger than the diameter of the inflator 14. The opening end of the second bag 12 on the inflator 14 side is attached to the inflator 14 together with the gas distribution ring 15. The opening end of the second bag 12 on the first bag 11 side is stitched to the outer surface of the inflator side bag 11a by the suture thread 12c. The deployment height of the second bag 12 is regulated by the control cylinder 13 and becomes a donut shape when deployed. Due to the regulation of the deployment height, the second bag 12 has a lower deployment height (thinner thickness) and a larger diameter (a larger pressure receiving area) than the first bag 11. The second bag 12 is a bag that is deployed second, and receives the occupant when the physique is large and the impact of the collision is large, or when the seat belt is not worn or when the distance from the occupant is long. In particular, since the second bag 12 has a large pressure receiving area, the second bag 12 can catch an occupant who has moved obliquely. Incidentally, when the second bag 12 is not deployed, the second bag 12 is folded to the outside so as to have a flat shape.

  The control cylinder 13 is made of cloth and has a cylindrical shape having a slightly larger diameter than the inflator 14. The opening end of the control cylinder 13 on the inflator 14 side is attached to the inflator 14 together with the gas distribution ring 15. The opening end of the control tube 13 on the first bag 11 side is sewn together with the strap 11e to the outer surface of the inflator side bag 11a by the suture thread 11f. Therefore, the closed space of the first bag 11 is configured by the control cylinder 13 and the inflator 14. In the second bag 12, a donut-shaped closed space is configured by the control cylinder 13 and the inflator 14. As described above, the control cylinder 13 serves as a partition wall between the first bag 11 and the second bag 12, and has a function of a gas supply passage for reliably supplying gas to the first bag 11.

  When the second bag 12 is not deployed, the control cylinder 13 is folded inward in a relaxed state, and the outer end portion folded and overlapped is sewn with a suture thread 13a. Therefore, the control cylinder 13 is formed with a donut-shaped closed space portion 13b and has an opening 13c at the center thereof (see FIGS. 4 and 5). As the suture thread 13a, a material that can be easily broken by an extremely high internal pressure of the closed space 13b is selected. Alternatively, it is sewn so as to be broken by an extremely high internal pressure of the closed space portion 13b. The closed space portion 13b has a sealed bag shape by stitching an opening end portion 13d opened to the second bag 12 with a suture thread 13a. When supplying gas to the 1st bag 11, the opening part 13c becomes a gas flow path from the gas distribution ring 15 to the 1st bag 11 (refer FIG. 1).

  The control cylinder 13 has two conduits 16 and 16 attached to diagonal positions of the open end portion 13d of the donut-shaped closed space portion 13b, and gas is introduced into the bag-shaped closed space portion 13b by the conduits 16 and 16. Is to be supplied. When the internal pressure of the closed space portion 13b becomes extremely high due to the supply of gas, the suture thread 13a is broken and the closed space portion 13b disappears. Then, the second bag 12 is deployed by the gas from the conduits 16 and 16, and the control cylinder 13 gradually extends from the folded state according to the deployment of the second bag 12, and eventually becomes a tensioned state. Therefore, the control cylinder 13 has a cylindrical shape (see FIG. 2). The internal pressure inside the cylindrical shape of the control cylinder 13 is the same as that of the first bag 11. Since the internal pressure of the 2nd bag 12 is set so that it may become higher than the internal pressure of the 1st bag 11, the control cylinder 13 becomes a cylindrical shape of the state hollowed inward (refer FIG. 2). Further, the control cylinder 13 has a function of forming an inner peripheral surface of the second bag 12 and restricting the deployed height of the second bag 12. Therefore, the height of the cylindrical shape of the control cylinder 13 is appropriately set according to how much the second bag 12 is developed. Furthermore, the developed height of the second bag 12 is adjusted by the cylindrical shape being depressed due to the internal pressure difference between the bags 11 and 12.

  The inflator 14 includes a cylindrical portion 14a and a flange portion 14b provided on the outer periphery of the cylindrical portion 14a (see FIGS. 3 and 9). The cylindrical portion 14a is partitioned into four gas generation chambers in plan view, and first gas generation chambers 14c and 14c and second gas generation chambers 14d and 14d are formed (see FIG. 9). The flange portion 14 b is used for attaching the second bag 12, the control cylinder 13, the gas distribution ring 15, and the conduits 16 and 16.

  The first gas generation chambers 14c and 14c are larger than the second gas generation chambers 14d and 14d because the gas must be supplied to the first bag 11 having a larger capacity than the second bag 12. The first gas generation chambers 14c and 14c are arranged at diagonal positions so as to supply gas uniformly into the bag. Two rectangular gas outlets 14e are opened on the side surface of the first gas generation chamber 14c in order to flow gas into the gas distribution ring 15 (see FIG. 9). In the first gas generation chamber 14 c, gas flows into the gas distribution ring 15 from the gas outlets 14 e and 14 e. The first gas generation chamber 14c is provided with two squibs, and each squib ignites each gas generating agent to generate gas. In the first gas generation chambers 14c and 14c, the internal pressure of the first bag 11 can be adjusted to three levels of output levels: low pressure, medium pressure, and high pressure. Only one squib is ignited, one squib in each of the two first gas generation chambers 14c and 14c is ignited in the case of an intermediate pressure level, and two first gas generation chambers 14c and 14c in the case of a high pressure level. Ignite each of the two squibs.

  The second gas generation chambers 14d and 14d supply gas to the closed space portion 13b of the control cylinder 13 and the second bag 12 having a capacity smaller than that of the first bag 11, and thus are smaller than the first gas generation chamber 14c. However, the second gas generation chambers 14d and 14d generate high-pressure gas because the internal pressure of the closed space 13b needs to be extremely high and the internal pressure of the second bag 12 needs to be higher than the internal pressure of the first bag 11. To do. The second gas generation chambers 14 d and 14 d are arranged at diagonal positions so as to supply gas uniformly into the closed space portion 13 b and the second bag 12. One rectangular gas outlet 14f is opened on the side surface of the second gas generation chamber 14d so as to flow gas into the gas distribution ring 15 (see FIG. 9). In the second gas generation chamber 14d, gas flows into the gas distribution ring 15 from the gas outlet 14f. The second gas generating chamber 14d is provided with two squibs, and each squib ignites each gas igniter to generate gas. Similarly to the first gas generation chambers 14c and 14c, the second gas generation chambers 14d and 14d can adjust the internal pressure of the second bag 12 to three levels of output levels: low pressure, medium pressure, and high pressure.

  The flange part 14b is plate-shaped and has a donut shape in plan view. A plurality of bolt holes 14g,... Are opened in the flange portion 14b (see FIG. 9). The bolt holes 14g are arranged corresponding to at least the positions of the second gas generation chambers 14d and 14d.

  The gas distribution ring 15 distributes the gas generated in the first gas generation chambers 14c and 14c of the inflator 14 into the control cylinder 13 (and thus the first bag 11), and also generates the gas in the second gas generation chambers 14d and 14d. The gas is distributed into the conduits 16 and 16 (as a result, the closed space portion 13b of the control cylinder 13 and the second bag 12). The gas distribution ring 15 has a donut shape having an inner peripheral surface fitted to the outer peripheral surface of the inflator 14 (see FIG. 7). The gas distribution ring 15 has a height slightly lower than the height from the flange portion 14b of the inflator 14 to the surface of the cylindrical portion 14a on the control tube 13 side (see FIG. 3). The gas distribution ring 15 is divided into four corresponding to the four gas generation chambers 14c, 14c, 14d, and 14d of the inflator 14, and the first gas distribution chambers 15a and 15a and the second gas distribution chambers 15b and 15b are formed. (See FIG. 8).

  The first gas distribution chambers 15a, 15a are larger than the second gas distribution chambers 15b, 15b because a large amount of gas from the first gas generation chambers 14c, 14c must be distributed. In the inner peripheral surface of the first gas distribution chamber 15a, gas inlets 15c having the same size and shape as the gas outlets 14e, corresponding to the positions of the gas outlets 14e, 14e of the first gas generation chamber 14c, 15c is opened (see FIG. 8). In addition, two circular gas distribution ports 15d and 15d are opened on the surface of the first gas distribution chamber 15a on the control cylinder 13 side in order to distribute gas into the control cylinder 13 (see FIG. 7). ).

  The second gas distribution chambers 15b and 15b distribute the gas from the second gas generation chambers 14d and 14d, and thus are larger than the first gas distribution chambers 15a and 15a. A gas inlet 15e having the same size and shape as the gas outlet 14f is opened on the inner peripheral surface of the second gas distribution chamber 15b corresponding to the position of the gas outlet 14f of the second gas generation chamber 14d. (See FIG. 8). In addition, one circular gas distribution port 15f is opened on the outer peripheral surface of the second gas distribution chamber 15b in order to distribute gas to the conduit 16 (see FIG. 8).

  Thus, in the gas distribution ring 15, the gas introduction ports 15c and 15c and the gas distribution ports 15d and 15d are spatially connected in the first gas generation chamber 15a, and the gas introduction port 15e in the second gas distribution chamber 15b. And the gas distribution port 15f are spatially connected. In the gas distribution ring 15, the gas introduction port 15c and the gas distribution port 15f are spatially blocked, and the gas introduction port 15e and the gas distribution port 15d are spatially blocked. In addition, the gas distribution ring 15 is aligned with the positions of the gas outlet 14e and the gas inlet 15c of the inflator 14, and the positions of the gas outlet 14f and the gas inlet 15e of the inflator 14, and the inner peripheral surface of the gas distributor 15 Mounted in close contact with the outer peripheral surface. Therefore, between the inflator 14 and the gas distribution ring 15, the gas outlet 14e and the gas inlet 15c are spatially connected, and the gas outlet 14f and the gas inlet 15e are spatially connected.

  Further, a large number of stacked coolants 15g,... Are provided in all the gas distribution chambers 15a,. One coolant 15g has an outer shape that conforms to the inner peripheral shape of each gas distribution chamber 15a or 15b, and is thin. Each coolant 15g is formed in a mesh shape having a very small mesh size, and the mesh positions of the meshes of the coolants 15g,. Therefore, in the gas distribution chambers 15a,... In which a large number of coolants 15g,... Are stacked, the mesh positions of the meshes between the layers are irregular, and when the gas passes, fine particles such as burning debris are removed from the gas. Is done. As described above, the gas distribution ring 15 has a function of cooling the gas by the coolants 15g,... And a filter function of removing fine particles of the gas. Therefore, it is not necessary to provide the inflator 14 with coolant or a filter.

  The conduit 16 is hollow and has a thin tubular shape (see FIG. 5). Two conduits 16, 16 are provided in the second bag 12, and connect the second gas generation chambers 14 d, 14 d formed at diagonal positions of the inflator 14 and the closed space portion 13 b of the control cylinder 13 (see FIG. 1). When gas is generated in the second gas generation chamber 14d, the conduit 16 guides the generated gas to the closed space portion 13b. The conduit 16 is made of a single thin cloth, and is formed by folding back the center part in the width direction of the cloth, aligning the ends in the longitudinal direction, and stitching the end part with the suture thread 16a (FIG. 4). reference). One end of the conduit 16 is disposed in the second gas distribution chamber 15 b of the gas distribution ring 15 and is attached to the flange portion 14 b of the inflator 14. The other end of the conduit 16 is attached to the open end 13d of the closed space 13b (see FIG. 5). Further, the other end of the conduit 16 becomes a free end in the second bag 12 after the closed space portion 13b disappears. Thus, the gas generated in the second gas generation chambers 14d and 14d is distributed to the closed space 13b and the second bag 12 through the gas distribution ring 15 and then supplied through the conduits 16 and 16. .

  A method of attaching the conduits 16 and 16 to the closed space portion 13b of the control cylinder 13 will be described. The conduit | pipe 16 is inserted in the opening edge part 13d of the closed space part 13b (refer FIG. 5). And the part which match | combined the cloth of the one side folded back of the conduit | pipe 16 and the cloth of the one side folded inside the opening edge part 13d is stitched | sutured by the suture thread 16b, and the cloth of the other side of the conduit | pipe 16 and opening edge part 13d The portion of the other side combined with the cloth on the other side is sutured by the suture thread 16b (see FIG. 6). Thus, the closed space portion 13b and the conduit 16 are attached so as to be spatially connected. The suture thread 16b is made of a material that can be easily broken by an extremely high internal pressure of the closed space 13b. Alternatively, it is sewn so as to be broken by an extremely high internal pressure of the closed space portion 13b.

  With reference to FIG. 3, how to attach the second bag 12, the control cylinder 13, the gas distribution ring 15, and the conduits 16, 16 to the inflator 14 will be described. First, one end of the second bag 12 is disposed on one surface of the flange portion 14 b of the inflator 14. The two conduits 16 and 16 are provided at the positions of the second gas distribution chambers 15b and 15b (gas distribution ports 15f and 15f) of the gas distribution ring 15 so as to cover the gas distribution ring 15. The gas distribution ring 15 is fitted into the inflator 14, and the gas distribution ring 15 is overlapped with the conduits 16 and 16 attached to the upper side of the second bag 12. At this time, the positions of the gas outlet 14e and the gas inlet 15c and the positions of the gas outlet 14f and the gas inlet 15e are matched. Further, one open end of the control cylinder 13 is overlaid on the upper side of the gas distribution ring 15. A gas introduction port 13e is opened at the end of the control cylinder 13 corresponding to the position of the gas distribution port 15d. The bolts 17 are fixed to the flange portion 14b by a plurality of sets of bolts 17,.

  In the airbag device 10 configured as described above, when a vehicle collides, first, gas is generated in the first gas generation chambers 14c and 14c of the inflator 14. At this time, since the output level of the first bag 11 is changed according to the magnitude of the impact of the collision, the physique of the occupant, etc., the squib to be ignited in the first gas generation chambers 14c, 14c is selected according to the output level. The generated gas enters the first gas distribution chamber 15a from the gas outlet 14e of the inflator 14 through the gas inlet 15c of the gas distribution ring 15, and is distributed from the gas distribution port 15d. The distributed gas is introduced into the inside of the control cylinder 13 from the gas introduction port 13e, and is supplied into the first bag 11 through the opening 13c of the control cylinder 13. And the 1st bag 11 expand | deploys (refer FIG. 1). At this time, no gas is supplied to the closed space portion 13b of the control cylinder 13, and the suture 13a is not broken, so that the second bag 12 is not deployed.

  When it is necessary to deploy the second bag 12 according to the magnitude of the impact of the collision, the occupant's physique, etc., the airbag device 10 generates gas in the second gas generation chambers 14d and 14d of the inflator 14. At this time, since the output level of the second bag 12 is changed according to the magnitude of the impact of the collision, the occupant's physique, and the like, the squib to be ignited in the second gas generation chambers 14d and 14d is selected according to the output level. The generated gas enters the second gas distribution chamber 15b from the gas outlet 14f of the inflator 14 through the gas introduction port 15e of the gas distribution ring 15, and is distributed from the gas distribution port 15f. The distributed gas is introduced into the closed space portion 13 b of the control cylinder 13 through the conduit 16. At this time, if the internal pressure of the closed space portion 13b exceeds a predetermined pressure, the suture thread 13a is easily broken and the closed space portion 13b disappears. And gas is supplied in the 2nd bag 12 by the conduit | pipe 16, and the 2nd bag 12 expand | deploys (refer FIG. 2). The deployment of the second bag 12 promotes the breaking of the suture thread 13a.

  Next, with reference to FIG.10 and FIG.11, the airbag apparatus 20 which concerns on 2nd Embodiment is demonstrated. FIG. 10 is a cross-sectional view around the inflator and the gas distribution ring of the airbag apparatus according to the second embodiment. FIG. 11 is a plan view of the inflator shown in FIG. In the airbag device 20, the same reference numerals are given to the same configurations as those of the airbag device 10 according to the first embodiment, and the description thereof is omitted.

  The airbag device 20 is different from the airbag device 10 in that gas is directly supplied from the inflator 24 to the control cylinder 13 (first bag). Therefore, the airbag device 20 differs from the airbag device 10 only in the configuration of the inflator 24 and the gas distribution ring 25.

  The inflator 24 has substantially the same configuration as the inflator 14 according to the first embodiment, but the position of the gas outlet 24e of the first gas generation chamber 24 is different. Two circular gas outlets 24e and 24e are opened on the surface of the first gas generation chamber 14c on the side of the control cylinder 13 in order to directly flow the gas into the control cylinder 13 (see FIG. 11).

  The gas distribution ring 25 has substantially the same configuration as the gas distribution ring 25 according to the first embodiment, but does not have a function of distributing the gas from the first gas generation chamber 24. Therefore, the gas distribution ring 25 is divided into rooms corresponding to the first gas distribution chambers 15a and 15a of the gas distribution ring 15 according to the first embodiment. The mouth is not open. Therefore, in the gas distribution ring 25, the gas introduction port 25e and the gas distribution port 25f are spatially connected in the second gas distribution chamber 25b. Further, between the inflator 24 and the gas distribution ring 25, the gas outlet 24f and the gas inlet 25e are spatially connected.

  Since the gas generated in the first gas generation chambers 24c, 24c does not pass through the gas distribution ring 25, it is necessary to provide the inflator 24 with a coolant for reducing the temperature of the gas and a filter for removing fine particles. . Further, since no gas is introduced into the control cylinder 13 from the gas distribution ring 25, no gas inlet is opened at the end of the control cylinder 13.

  In the airbag device 20 configured as described above, when a vehicle collides, first, gas is generated in the first gas generation chambers 24c and 24c of the inflator 24. The generated gas is directly introduced into the inside of the control cylinder 13 from the gas outlet 24e, and is supplied into the first bag (not shown) through the control cylinder 13. And the 1st bag develops. The case where the second bag 12 needs to be deployed is the same as the airbag device 10.

  Next, an airbag device 30 according to a third embodiment will be described with reference to FIGS. FIG. 12 is a cross-sectional view in the first bag deployed state showing the configuration of the airbag apparatus according to the third embodiment. 13 is a cross-sectional view taken along the line CC of FIG. 14 is a cross-sectional view around the vent hole one-way cover when the vent hole one-way cover of the airbag device of FIG. 12 is stitched, (a) before the suture break and (b) after the suture break. It is. Note that, in the airbag device 30, the same components as those of the airbag device 10 according to the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The airbag device 30 differs from the airbag device 10 in that it includes a vent hole and a vent hole one-way cover. Therefore, the airbag device 30 differs from the airbag device 10 only in the configuration of the first bag 31 and the second bag 32.

  As with the first bag 11 according to the first embodiment, the first bag 31 includes an inflator side bag 31a and an occupant side bag 31b, and is sewn with a suture 31d to form a bag. Two circular vent holes 31f are opened in the inflator side bag 31a between a position where the strap 31e is attached and a position where the second bag 32 and the suture thread 32c are sewn. The vent holes 31f and 31f are arranged at diagonal positions across the opening 31c. The vent holes 31f and 31f are electrically connected to the second bag 32, and the first bag 31 and the second bag 31 can be spatially connected via the vent holes 31f and 31f. The vent hole 31f has a function of letting the gas in the first bag 31 escape to the second bag 32 so that the reaction force by the first bag 31 does not become too large. Incidentally, when the internal pressure of the first bag 31 is adjusted to a high pressure level, the reaction force by the first bag 31 may become larger than necessary.

  The second bag 32 has substantially the same configuration as the second bag 12 according to the first embodiment, but a vent hole one-way cover 32d is formed. The opening end of the second bag 32 on the first bag 31 side is partially extended to cover the vent holes 31f and 31f, and the extended portions serve as vent hole one-way covers 32d and 32d. Accordingly, the opening 32b of the second bag 12 is not a simple circular shape, and has convex portions (bent hole one-way covers 32d and 32d) at two locations (see FIG. 13). The opening end of the second bag 32 on the first bag 31 side is disposed at a position where the vent hole one-way covers 32d and 32d cover the vent holes 31f and 31f, and the outer peripheral side of the vent holes 31f and 31f is the inflator side by the suture thread 32c. It is stitched to the outer surface of the bag 31a. The vent hole one-way cover 32d has a function of allowing gas flowing out from the first bag 31 through the vent hole 31f and blocking gas flowing out from the second bag 32 through the vent hole 31f.

  As shown in FIG. 14A, the outer end portion of the vent hole one-way cover 32d may be sewn with a suture 32e along the outer peripheral portion of the vent hole 31f of the inflator side bag 31a. In this case, gas does not flow out from the first bag 31 to the second bag 32 until the suture 32e is broken. The suture 32e is made of a material that breaks when the internal pressure of the first bag 31 becomes higher than a predetermined pressure (that is, when the reaction force by the first bag 31 becomes too large). Alternatively, the first bag 31 is sewn so as to break when the internal pressure of the first bag 31 becomes higher than a predetermined pressure.

  In the airbag device 30 configured as described above, similarly to the airbag device 10, the first bag 31 and the second bag 32 are deployed according to the magnitude of the impact of the collision, the physique of the occupant, and the like. At this time, each internal pressure of the first bag 31 and the second bag 32 is adjusted to a predetermined level according to the magnitude of impact of the collision, the physique of the occupant, and the like. When the internal pressure of the first bag 31 is adjusted to a high level, when the internal pressure of the first bag 31 exceeds a predetermined pressure, gas flows out from the first bag 31 into the second bag 32 through the vent holes 31f and 31f. To do. In the configuration in which the suture is sewn with the suture thread 32e, when the internal pressure of the first bag 31 is less than a predetermined pressure, the suture thread 32e is not broken and the outflow of gas from the first bag 31 is blocked (FIG. 12A )), When the internal pressure of the first bag 31 exceeds a predetermined pressure, the suture 32e is broken, and the outflow of gas from the first bag 31 is allowed (see FIG. 12B). However, even when the internal pressure of the second bag 32 is adjusted to a high level, outflow of gas from the second bag 32 to the first bag 31 is blocked by the vent hole one-way covers 32d and 32d.

  Next, the inflator control unit 40 of the airbag apparatus according to the first to third embodiments will be described with reference to FIG. FIG. 15 is a configuration diagram of the inflator control unit of the airbag apparatus according to the present embodiment.

  The inflator control unit 40 controls the inflators 14 and 24 according to the magnitude of impact at the time of collision and the occupant's physique, and controls the distance between the bag and the occupant and wearing / non-wearing of the seat belt. For this purpose, the inflator control unit 40 includes an occupant physique sensor 41, an occupant distance sensor 42, a buckle switch 43, a crash severity sensor 44, and an ECU [Electronic Control Unit] 45. The occupant physique sensor 41 is a sensor that detects the occupant's physique, and is, for example, a seat load meter. The occupant physique sensor 41 transmits an occupant physique signal PS indicating the occupant's physique to the ECU 45. The occupant distance sensor 42 is a sensor that detects the distance between the occupant and the bag mounting position, and is, for example, a CCD camera or an infrared sensor. The occupant distance sensor 42 transmits an occupant distance signal DS indicating distance information to the ECU 45. The buckle switch 43 outputs an on signal when the seat belt is worn, and outputs an off signal when the seat belt is not worn. The buckle switch 43 transmits a buckle signal BS indicating on / off to the ECU 45. The crash severity sensor 44 is a sensor that detects the magnitude of impact (severity of collision) at the time of collision. The crash severity sensor 44 transmits a collision signal SS indicating the severity of the collision to the ECU 45.

  The ECU 45 is an electronic control unit including a CPU [Central Processing Unit], a ROM [Read Only Memory], a RAM [Random Access Memory], and the like, and functions as a control device for the airbag apparatus. The ECU 45 takes in the occupant physique signal PS from the occupant physique sensor 41, and sets the occupant's physique in three stages of small, medium, and large based on the occupant physique signal PS. In the ECU 45, the occupant distance signal DS from the occupant distance sensor 42 is taken, and the distance between the bag mounting position and the occupant is set in three steps of near, middle, and far based on the occupant distance signal DS. The ECU 45 takes in the buckle signal BS from the buckle switch 43 and sets whether or not the seat belt is worn based on the buckle signal BS. The ECU 45 takes in the collision signal SS from the crash severity sensor 44 and sets the severity of the collision in two stages of medium speed and high speed based on the collision signal SS. The ECU 45 uses a control map indicating the relationship between the four parameters of physique, distance, seat belt wearing / non-wearing, and severity of collision, the number of bags to be deployed, and the output level (internal pressure level) of the bags to be deployed. Determine the number of bags to be deployed (1 or 2) and the output level (low level, medium level, high level) of the bags to be deployed. Further, the ECU 45 selects the squibs 46 to be ignited according to the number of bags to be deployed and the output level, and supplies an ignition current CI to each of the selected squibs. When the number of bags to be deployed is 2, the ECU 45 supplies the ignition current CI to the squibs 46 in the first gas generation chamber, and the squibs 46 in the second gas generation chamber after an extremely short time has elapsed. Is supplied with an ignition current CI.

  Finally, an example of control in the inflator control unit 40 using the control map shown in FIG. 16 will be described. FIG. 16 is a control map showing an example of control in the airbag apparatus according to the present embodiment. The control map of FIG. 16 shows the occupant's physique (small, medium, large), the bag mounting position and the occupant distance (near, medium, far), the seat belt (wearing, not wearing), the severity of the collision (medium speed, The number (1, 2) of bags to be deployed is shown in the upper row according to the (high speed), and the output level (low, medium, high) of the bags to be deployed is shown in the lower row.

  As for the occupant's physique, the larger the occupant's physique, the larger the occupant's mass and the greater the kinetic energy. Therefore, the reaction force of the bag and the pressure receiving area and thickness of the bag must be increased. The longer the distance between the bag and the occupant, the longer the occupant travel distance, and the longer the restraint by the bag, the greater the amount of energy absorbed by the bag. In the case of an oblique collision or the like, the occupant is greatly displaced from the center of the bag. Therefore, as the distance between the bag and the occupant increases, the reaction force of the bag and the pressure receiving area and thickness of the bag must be increased. Regarding the severity of the collision, the reaction force of the bag and the pressure receiving area and thickness of the bag must be increased as the collision becomes more severe. When the seat belt is not worn, the reaction force of the bag and the pressure receiving area and thickness of the bag must be increased. Based on this concept, a control map is set to change the bag to the optimal condition to protect the occupant according to various combinations of physique, distance, seat belt wearing / non-wearing, and collision severity. Has been.

  The number of bags to be developed will be described. When the occupant's physique is small, the number of bags to be deployed is 1. When the occupant's physique is medium, the number of bags to be deployed is 1 when the distance is close, and when the distance is medium, the number of bags to be deployed is 1 except when the seat belt is not worn and the severity of the collision is high. When the distance is long, the number of bags to be deployed only when the seat belt is worn and the severity of the collision is medium speed is 1. When the occupant's physique is large, the number of bags to be deployed is 1 when the distance is short, and the number of bags to be deployed is 1 only when the severity of the collision is medium speed when the distance is medium. Sometimes the number of bags to be deployed is 1 only when the seat belt is worn and the severity of the collision is medium speed. In cases other than the above, the number of bags to be deployed is two. When the number of bags to be deployed is 1, since only the first bag is deployed in the airbag device, the pressure receiving area is small, the thickness is thin, and the shape is a shape composed of only the first bag. When the number of bags to be deployed is 2, in the airbag device, since the first bag and the second bag are deployed, the pressure receiving area is increased, the thickness is increased, and the shape is a shape composed of the first bag and the second bag. It becomes.

  The output level of the bag to be developed will be described. When only the first bag is deployed, it is set to a low level when the seat belt is worn and the collision severity is medium speed, except when the body size is medium and the distance is medium when the seat belt is worn and the collision severity is high speed. Low level, medium level when seat belt is worn and collision severity is high, medium physique and distance is medium, medium level when seat belt is not worn and collision severity is medium speed and physique is small or medium When the seat belt is not worn and the severity of the collision is medium speed and the physique is large, the level is low.When the seat belt is not worn and the severity of the collision is high and the physique is large, the level is low. When the severity of collision is high and the distance is short, the level is medium.When the seat belt is not worn, the severity of collision is high, the physique is small, and the distance is medium or far A high level. When deploying the first bag and the second bag, when the seat belt is worn and the severity of the collision is high speed and the body size is medium, the first bag is set to the low level and the second bag is set to the middle level, and the seat belt is worn and the collision is severe. The first bag is set to a low level and the second bag is set to a medium level when the vehicle is fast and large, and the distance is medium. The first bag is worn when the seat belt is worn and the severity of collision is high, the body is large, and the distance is long. When the bag is at a medium level and the second bag is at a high level, when the seat belt is not worn and the severity of the collision is medium speed and the physique is medium, the first bag and the second bag are at a high level, and the seat belt is not worn and the collision is When the severity is medium speed and the physique is large, the first bag is set to the medium level and the second bag is set to the high level. When the seat belt is not worn and the severity of the collision is high speed, the first bag is set. The grayed and second bags as a high level. In the airbag device, as the output level (internal pressure) of the bag increases, the reaction force of the bag also increases and a large impact energy can be absorbed.

  According to the airbag apparatus according to the first to third embodiments, the severity of impact, the occupant's physique, the distance between the bag and the occupant, the shape of the bag, and the pressure-receiving area depending on whether the seat belt is worn or not worn The thickness and the internal pressure can be changed, and the bag can be changed to an optimum state for protecting the occupant according to the conditions at the time of the collision. Furthermore, according to this airbag device, the control cylinder can reliably supply the gas only to the first bag, and can regulate the height of the second bag deployed. In particular, the deployment height can be adjusted by the internal pressure difference between the first bag and the second bag. Moreover, according to this airbag apparatus, since it was set as the structure provided with a coolant and a filter function in a gas distribution ring, an inflator can be reduced in size.

  Furthermore, according to the airbag apparatus according to the third embodiment, the reaction force of the first bag is not increased more than necessary by causing the gas to flow from the first bag to the second bag through the vent hole. Gas is not released into the atmosphere. Moreover, according to this airbag apparatus, gas can be reliably flowed out only from one direction of the 2nd bag from the 1st bag by the vent hole one-way cover.

  As mentioned above, although embodiment which concerns on this invention was described, this invention is implemented in various forms, without being limited to the said embodiment.

  For example, in the present embodiment, two bags, a first-stage bag and a second-stage bag, are used, but the number of bags may be three or more, and the shape of each bag is not particularly limited.

  In the present embodiment, the gas distribution ring is provided. However, the gas distribution ring may be omitted. In this case, gas is supplied to the corresponding bag directly from the gas outlet provided in each gas generation chamber of the inflator or from a conduit connected to the gas outlet.

  In the present embodiment, the inflator has a cylindrical shape, and the first gas generation chamber and the second gas generation chamber are configured in one inflator. However, the shape of the inflator can be set as appropriate, and the first gas generation unit You may comprise a 2nd gas generation part with a separate inflator. Further, although two gas generation chambers are configured for each bag, the number is not particularly limited. The number of gas outlets in each gas generation chamber is not particularly limited.

  In the present embodiment, the gas distribution ring is provided with the coolant and the filter, but the inflator may be provided with the coolant and / or the filter.

  In the present embodiment, the control cylinder (gas control means) is configured by folding the cylindrical control cloth inward and stitching the opening with the control thread. However, the control cylinder (gas control means) is formed as a partition wall between the first bag and the second bag. Since the gas supply passage of the first bag only has to be provided, the configuration is not particularly limited as long as the gas control means has such a function.

  In the present embodiment, an example of the control is shown by the control map, but the control takes into account the severity of the collision and the physique of the occupant in consideration of the number, shape, arrangement, output level, etc. It may be performed as appropriate.

  In the third embodiment, the vent hole one-way cover is provided, but the vent hole one-way hole may not be provided.

It is sectional drawing in the 1st bag expansion | deployment state which shows the structure of the airbag apparatus which concerns on 1st Embodiment. It is sectional drawing in the whole bag expansion | deployment state which shows the structure of the airbag apparatus which concerns on 1st Embodiment. FIG. 2 is an enlarged view around the inflator and the gas distribution ring in FIG. 1. It is a top view of the control cylinder and conduit | pipe of FIG. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a perspective view of the gas distribution ring of FIG. It is a plane sectional view of the gas distribution ring of FIG. It is a plane sectional view of the inflator of FIG. It is sectional drawing of the inflator and gas distribution ring periphery of the airbag apparatus which concerns on 2nd Embodiment. It is a top view of the inflator of FIG. It is sectional drawing in the 1st bag expansion | deployment state which shows the structure of the airbag apparatus which concerns on 3rd Embodiment. It is CC sectional view taken on the line of FIG. It is sectional drawing of the vent hole one way cover periphery in case the vent hole one way cover of the airbag apparatus of FIG. 12 is stitch | sutured, (a) is before a suture breakage, (b) is after a suture breakage. It is a block diagram of the inflator control part of the airbag apparatus which concerns on this Embodiment. It is a control map which shows an example of the control in the airbag apparatus which concerns on this Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,20 ... Airbag apparatus, 11, 31 ... 1st bag, 11a, 31a ... Inflator side bag, 11b, 31b ... Passenger side bag, 11c, 31c ... Opening part, 11d, 11f, 11g, 31d ... Suture, 11e, 31e ... strap, 31f ... vent hole, 12, 32 ... second bag, 12a, 12b, 32b ... opening, 12c, 32c, 32e ... suture, 32d ... vent hole one-way cover, 13 ... control cylinder, 13a ... suture thread, 13b ... closed space part, 13c ... opening part, 13d ... opening end part, 13e ... gas inlet, 14, 24 ... inflator, 14a ... cylindrical part, 14b ... flange part, 14c, 24c ... first gas Generation chamber, 14d, 24d ... second gas generation chamber, 14e, 14f, 24e, 24f ... gas outlet, 14g ... bolt hole, 15 ... gas distribution ring 15a ... 1st gas distribution chamber, 15b, 25b ... 2nd gas distribution chamber, 15c, 15e, 25e ... Gas introduction port, 15d, 15f, 25f ... Gas distribution port, 15g ... Coolant, 16 ... Conduit, 16a, 16b ... Suture, 17 ... bolt, 18 ... nut, 40 ... inflator controller, 41 ... occupant physique sensor, 42 ... occupant distance sensor, 43 ... buckle switch, 44 ... crush-severity sensor, 45 ... ECU, 46 ... squib

Claims (7)

Two or more bags,
An inflator having one or more gas generators corresponding to each bag, each gas generator having a gas outlet;
Gas distribution means for distributing the gas from the gas outlet of each gas generation section of the inflator to a corresponding bag;
A gas control means serving as a partition wall between the first and second bags of the two or more bags and serving as a gas supply passage to the first deployed bag; Air bag device. Two or more bags,
An inflator having one or more gas generators corresponding to each bag, each gas generator having a gas outlet;
Of the two or more bags, a partition between the first deployed bag and the other bag serves as a gas supply passage to the first deployed bag, and other than the first deployed bag Gas control means for regulating the unfolded height of the bag,
The airbag apparatus according to claim 1, wherein the deployment height of the gas control means is adjusted by a difference between an internal pressure of the first deployed bag and an internal pressure of a bag other than the first deployed bag. Two or more bags,
An inflator having one or more gas generators corresponding to each bag, each gas generator having a gas outlet;
A gas control means serving as a partition wall between the first and second bags of the two or more bags and serving as a gas supply passage to the first deployed bag;
The bag to be deployed first is provided with a vent hole,
The airbag apparatus according to claim 1, wherein gas is allowed to flow out from the first deployed bag through the vent hole to a bag other than the first deployed bag.   The vent hole allows gas to flow out from the first deployed bag to a bag other than the first deployed bag, and from the bag other than the first deployed bag to the first deployed bag. The airbag apparatus according to claim 3, further comprising a vent hole one-way cover that blocks outflow of gas.   The airbag apparatus according to any one of claims 2 to 4, further comprising a gas distribution unit that distributes a gas from a gas outlet of each gas generation unit of the inflator to a corresponding bag.   6. The airbag apparatus according to claim 1, wherein the gas distribution means is provided with a coolant and / or a filter in a gas flow path. The gas control means is a bag having an opening formed by folding a cylindrical cloth inside, and the opening is sewn with a thread to form a closed space,
The opening is opened with respect to a bag other than the first bag to be deployed,
Connecting a gas outlet or a gas distribution means of a gas generating unit corresponding to a bag other than the first deployed bag and the opening with a conduit;
When a bag other than the first deployed bag is deployed, gas is generated in a gas generating portion corresponding to the bag other than the first deployed bag, and the thread that stitches the opening is broken. The airbag device according to any one of claims 1 to 6.

Images