WO2022018888A1

WO2022018888A1 - Airbag device

Info

Publication number: WO2022018888A1
Application number: PCT/JP2021/002460
Authority: WO
Inventors: 信一朗浮田
Original assignee: 株式会社ダイセル
Priority date: 2020-07-21
Filing date: 2021-01-25
Publication date: 2022-01-27
Also published as: JP2022020933A

Abstract

This airbag device comprises: a gas generator; an airbag which has a gas introduction opening and which is expanded during operation of the gas generator by a gas that is fed from the gas generator and is introduced into the inside through the gas introduction opening; and a gas feed tube which connects the gas generator with the gas introduction opening. The gas feed tube is detachably connected to the gas introduction opening. The airbag has a shut-off valve which shuts the gas introduction opening to prevent the gas from flowing out from the inside to the outside at least when the gas feed tube is detached from the gas introduction opening after the introduction of gas into the inside through the gas introduction opening is started.

Description

Airbag device

The present invention relates to an airbag device.

Conventionally, an airbag device is known as an occupant protection device that protects occupants of automobiles and the like. The airbag device is a device for protecting an occupant from an impact generated at the time of a vehicle collision by instantly inflating and deploying the airbag at the time of a vehicle collision.

The airbag device is equipped with a gas generator for supplying gas for expanding and deploying the airbag during operation. As this type of gas generator, an igniter and a gas generator are placed in the housing, and the gas generator is burned by operating the igniter, and the combustion gas is discharged from the gas discharge hole formed in the housing to the outside. Those that are released to the air and those that destroy a part of the container by operating the igniter and discharge the pressurized gas inside are widely used.

Here, when a collision object is detected within a predetermined distance in the traveling direction of the motorcycle, the airbag is discharged in the traveling direction of the motorcycle and the airbag is deployed at a position in front of the motorcycle. Airbag devices for motorcycles are known (see, for example, Patent Document 1). The motorcycle airbag device described in Patent Document 1 includes an airbag module main body including an inflator (gas generator), an airbag, a substrate on which an inflator ignition circuit is mounted, and the like. When it is detected that the motorcycle approaches an object in front (vehicle, wall, etc.) within a predetermined distance, the airbag module body is released in front of the vehicle body, and then the motorcycle becomes the collision object. It is described in Patent Document 1 that the airbag module main body discharged to the front of the vehicle body at a closer timing activates its own inflator to deploy the airbag. Further, in the airbag device described in Patent Document 1, as an energy source for discharging the airbag module main body from the vehicle body, an inflator is provided on the vehicle body side in addition to the inflator provided on the airbag module main body, and is provided on the vehicle body side. The high-pressure gas generated by the operation of the inflator is used to discharge the airbag module body to the outside.

Japanese Unexamined Patent Publication No. 2008-183913 Japanese Unexamined Patent Publication No. 7-196272

In the airbag device described in Patent Document 1, since the airbag module main body that can be detached from the vehicle body is provided with an inflator for inflating the airbag, the airbag module main body may become heavy. Further, when the deployed airbag is used not for shock absorption but as a buoyant body for rescue of personnel in the event of a water crisis, it is necessary to maintain the airbag in a deployed state. , The use of the airbag device for shock absorption applications is limited, and there is no disclosure about keeping the airbag in an unfolded state.

The technique of the present disclosure has been made in view of the above-mentioned problems, and an object thereof is to keep the airbag expanded even after the airbag inflated by the gas from the gas generator is separated from the gas supply pipe. It is an object of the present invention to provide an airbag device that can be maintained and that the airbag after deployment is lightweight and easy to carry.

In order to solve the above problems, the technology of this disclosure has adopted the following configuration. That is, one aspect of the technique of the present disclosure has a gas generator and a gas inlet portion, and the gas supplied from the gas generator when the gas generator is operated is introduced into the inside from the gas inlet portion. The gas supply pipe is provided with an air bag that expands by the operation and a gas supply pipe that connects the gas generator and the gas introduction port portion, and the gas supply pipe is detachably connected to the gas introduction port portion. The airbag is provided from the inside to the outside by closing the gas introduction port at least when the gas supply pipe is separated from the gas introduction port after the start of gas introduction from the gas introduction port to the inside. It is an air bag device having a shutoff valve that suppresses the outflow of gas.

Further, the gas introduction port portion is connected to a supply pipe side connection portion having a first connection port connected to the gas supply pipe on one end side and a second connection portion connected to the gas introduction opening of the airbag on the other end side. It is a tubular member including a bag-side connection portion having a connection port, and the gas introduction port portion has a fragile portion formed between the supply pipe side connection portion and the bag-side connection portion and borders the fragile portion. The supply pipe side connection portion may be detachable from the bag side connection portion, and the shutoff valve may be arranged at the bag side connection portion.

Further, the shutoff valve may be arranged at the second connection port.

Further, the gas supply pipe may be inserted into the supply pipe side connection portion, and the tip of the gas supply pipe may be located inside the supply pipe side connection portion.

Further, the airbag device may be mounted on the vehicle, and the airbag may be provided so as to be deployable toward the vehicle interior when the gas generator is operated.

Further, the airbag device according to the present disclosure includes, in addition to a collision sensor for detecting a collision of a vehicle and operating the gas generator, an operation switch for receiving an operation request of the gas generator from an occupant, and an operation switch. It may be provided with at least one of the submersion sensors for detecting the submersion of the vehicle and operating the gas generator.

According to the technique of the present disclosure, it is possible to maintain the airbag in the deployed state even after the airbag expanded by the gas from the gas generator is separated from the gas supply pipe, and the airbag after deployment can be maintained. Can provide an airbag device that is lightweight and easy to carry.

FIG. 1 is an external perspective view of a vehicle seat provided with the airbag device according to the first embodiment. FIG. 2 is a schematic diagram illustrating a connection mode of the gas supply pipe and the airbag according to the first embodiment. FIG. 3 is a diagram illustrating an internal structure of a connection portion between a gas supply pipe and an airbag according to the first embodiment. FIG. 4 is a diagram illustrating a state in which the shutoff valve according to the first embodiment opens the second connection port of the gas introduction port portion. FIG. 5 is a diagram showing a state in which the airbag main body after deployment is removed from the gas supply pipe according to the first embodiment.

Hereinafter, the airbag device according to the embodiment of the present disclosure will be described with reference to the drawings. It should be noted that the configurations and combinations thereof in each embodiment are examples, and the configurations can be added, omitted, replaced, and other changes as appropriate within the range not deviating from the gist of the present invention. The present disclosure is not limited by embodiments, but only by the claims.

<Embodiment 1>
FIG. 1 is an external perspective view of a vehicle seat 1 provided with the airbag device 10 according to the first embodiment. In the present specification, the front-rear direction (depth direction), the left-right direction (width direction), and the vertical direction (height direction) of the vehicle seat 1 are the occupants (seats) seated on the vehicle seat 1. The explanation will be given based on each of the front-back, left-right, and up-down directions as seen from above. Further, FIG. 1 shows a state before the airbag device 10 included in the vehicle seat 1 is activated.

The vehicle seat 1 is a seat on which a vehicle occupant sits. The vehicle seat 1 includes a seat cushion 2 (seat surface) that supports the buttocks of the occupant, and a seat back 3 (backrest) that supports the back of the occupant. The seat back 3 is connected to the seat cushion 2 so as to be tiltable with respect to the seat cushion 2. Further, the vehicle seat 1 is attached to the upper end portion of the seat back 3 and includes a headrest 4 that supports the head of the occupant. The headrest 4 may be integrally formed with the seat back 3, may be fixed to the seat back 3, or may be removable from the seat back 3.

Further, the vehicle seat 1 includes a seat belt 5 that restrains the occupant with respect to the vehicle seat 1. The seat belt 5 extends from the occupant's right shoulder to the left lower abdomen and restrains the occupant's upper body, and the wrap that extends from the occupant's right lower abdomen to the left lower abdomen and restrains the occupant's lower abdomen. It has a belt 5B.

The airbag device 10 according to the present embodiment is mounted on the vehicle seat 1 in order to protect the occupant seated on the vehicle seat 1 from the impact of a vehicle collision. The airbag device 10 includes an airbag 11, a gas generator 12, a gas supply pipe 13, and the like.

The airbag 11 shown in FIG. 1 is, for example, a side airbag installed in response to an impact from the side surface direction of the vehicle, and is stored, for example, on the near side (door trim side when viewed from the occupant) of the seat back 3. The airbag 11 is housed in a folded state, for example, in the seat back 3, and expands and expands when gas is supplied from the gas generator 12. When the airbag 11 is expanded by the gas supplied from the gas generator 12 when the gas generator 12 is operated, the airbag 11 pops out from the seat back 3 and expands toward the vehicle interior (front). However, the airbag 11 may be provided on the far side (opposite side of the near side) of the seat back 3, or may be provided on the upper end side of the seat back 3 in order to protect the head of the occupant. .. The airbag 11 in the present embodiment may be any airbag that expands toward the vehicle interior when inflated, and the position, size, range, etc. in which the airbag 11 is installed (including the installation location other than the seat) are particularly particular. Not limited.

The gas generator 12 in the airbag device 10 is arranged inside the seat back 3 and generates gas to be supplied to the airbag 11 at the time of operation. The gas generator 12 has, for example, a cylindrical (cylinder-shaped) metal housing having both ends closed, and houses an igniter, a gas generator, and the like in the housing. A known gas generator can be used as appropriate. The gas generator 12 in the present embodiment exemplarily adopts a pyro method for generating gas by burning a solid gas generator, but a stored gas method using a pressurized gas, a pyro method, and a stored gas are used. A gas generator such as a hybrid system combined with a gas system may be used. In particular, since the stored type gas generator emits a gas having a relatively low temperature during operation, volume shrinkage after introduction into the airbag 11 is more unlikely to occur. Therefore, when the gas generator 12 is of the stored type, there is an advantage that the expansion pressure of the airbag 11 after deployment can be easily maintained.

Further, the gas generator 12 of the airbag device 10 is controlled by the airbag ECU 20 mounted on the vehicle. The gas generator 12 operates the igniter by supplying an operating current from the airbag ECU 20 to the gas generator 12. When the gas generator 12 is of the pyro system, the igniter of the gas generator 12 is activated to ignite the gas generator, and the gas generated by the combustion of the gas generator is the gas formed in the housing. It is discharged to the outside of the housing through a discharge hole (not shown). The gas generator 12 can be arranged in a state of being attached to an appropriate frame member arranged inside the seat back 3. Further, in another aspect, the gas generator 12 may be arranged inside the seat cushion 2.

The airbag device 10 further includes a collision sensor 210, a submersion detection sensor 220, and an operation switch 230 mounted on the vehicle, which are connected to the airbag ECU 20 by wire or wirelessly. The airbag ECU 20 operates the gas generator 12 of the airbag device 10 according to the detection results of the collision sensor 210, the submersion detection sensor 220, and the operation switch 230. The collision sensor 210 is a sensor for detecting a collision of a vehicle and operating the gas generator 12. The submersion detection sensor 220 is a sensor for detecting the submersion of the vehicle and operating the gas generator 12. The operation switch 230 is a switch that receives an operation request from an occupant. The collision sensor 210 and the submersion detection sensor 220 may be provided at a plurality of locations in the vehicle, and the locations where they are installed are not particularly limited. Further, the operation switch 230 may accept a manual operation request from the occupant or a voice operation request.

The gas generator 12 and the airbag 11 in the airbag device 10 are connected by a gas supply pipe 13. The gas generated by the gas generator 12 during operation is supplied to the airbag 11 through the gas supply pipe 13. The gas supply pipe 13 is made of, for example, a metal or resin pipe member, but the material thereof is not particularly limited. Reference numeral 13A shown in FIG. 1 is a connection portion formed on the end side of the gas supply pipe 13 connected to the airbag 11. In the present embodiment, the connection portion 13A of the gas supply pipe 13 is connected to the gas introduction port portion of the airbag 11, and the gas supplied from the gas supply pipe 13 is the gas introduction port portion from the gas supply pipe 13. It is supplied to the airbag 11 through. In this embodiment, the airbag 11 and the gas supply pipe 13 may be integrally formed. Hereinafter, details of the connection mode of the gas supply pipe 13 and the airbag 11 will be described.

FIG. 2 is a schematic diagram illustrating a connection mode of the gas supply pipe 13 and the airbag 11 according to the first embodiment. FIG. 3 is a diagram illustrating an internal structure at a connection portion between the gas supply pipe 13 and the airbag 11 according to the first embodiment. The airbag 11 includes an airbag main body 30 and a gas inlet portion 40. The airbag body 30 is a bag body that expands and expands by the gas supplied through the gas supply pipe 13. 2 and 3 schematically show only a part of the airbag main body 30 and the gas supply pipe 13. As shown in FIG. 3, the airbag main body 30 has a gas introduction opening 30A, and the gas introduction port 40 is airtightly attached to the gas introduction opening 30A. Further, reference numeral 30B shown in FIG. 3 is an internal space of the airbag main body 30.

The gas introduction port 40 has a supply pipe side connection portion 42 having a first connection port 41 connected to the gas supply pipe 13 on one end side, and a gas introduction opening 30A of the airbag main body 30 in the airbag 11 on the other end side. It is configured as a tubular member including a bag-side connecting portion 44 having a second connecting port 43 connected to the bag side connecting portion 44. By connecting the second connection port 43 of the gas introduction port 40 to the gas introduction opening 30A of the airbag body 30, the gas flow path 40A formed inside the gas introduction port 40 and the inside of the airbag body 30 Space 30B communicates. In the present embodiment, the gas inlet portion 40 is formed by molding a resin such as plastic, but the material forming the gas inlet portion 40 is not particularly limited.

Further, in the gas introduction port 40, a fragile portion 45 is formed between the supply pipe side connection portion 42 and the bag side connection portion 44, that is, at the boundary portion. The fragile portion 45 is a portion formed more vulnerably as compared with other portions (supply pipe side connection portion 42 and bag side connection portion 44). In the present embodiment, the fragile portion 45 is formed as a thin portion having a thinner member than the supply pipe side connecting portion 42 and the bag side connecting portion 44. However, the fragile portion 45 may be formed more fragile than the other portions, for example, a low-strength portion (cutting or disconnection) having a lower strength than the supply pipe side connection portion 42 and the bag side connection portion 44. The fragile portion 45 may be formed as an easy portion).

Since the gas inlet portion 40 in the present embodiment has the fragile portion 45, the gas supply pipe 14 can be detachably connected to the gas inlet portion 40. More specifically, when an external force acts on the fragile portion 45, the bag-side connection portion 44 can be separated from the supply pipe side connection portion 42 with the fragile portion 45 as a boundary. In other words, the airbag main body 30 connected to the bag side connection portion 44 can be detached from the gas supply pipe 13 connected to the supply pipe side connection portion 42.

In the present embodiment, the fragile portion 45 extends along the circumferential direction of the gas inlet portion 40. As a result, for example, the occupant applies an external force to the fragile portion 45 of the gas introduction port 40 by pulling the airbag main body 30 after expansion and deployment, so that the airbag main body 30 after deployment can be removed from the gas supply pipe 13. It can be easily removed. Here, the fragile portion 45 may be provided intermittently along the circumferential direction of the gas inlet portion 40. Further, as a more preferable embodiment, there is an embodiment in which the fragile portion 45 extends in a ring shape over the entire circumference of the gas inlet portion 40. By doing so, the occupant of the vehicle can more easily remove the deployed airbag main body 30 from the gas supply pipe 13.

Further, as shown in FIGS. 2 and 3, the connection portion 13A of the gas supply pipe 13 is connected to the supply pipe side connection portion 42 of the gas introduction port portion 40. In the present embodiment, the inner diameter of the supply pipe side connecting portion 42 in the gas inlet portion 40 has a dimension slightly larger than the outer diameter of the connecting portion 13A in the gas supply pipe 13. The connection portion 13A of the gas supply pipe 13 is inserted from the first connection port 41 of the supply pipe side connection portion 42 in the gas introduction port portion 40.

Further, reference numeral 14 shown in FIGS. 2 and 3 is a fixture attached to the supply pipe side connection portion 42 of the gas introduction port portion 40, and the connection portion 13A of the gas supply pipe 13 is connected to the supply pipe side by the fixture 14. It is fixed to the connection portion 42. The fixative 14 may be, for example, a binding band or the like. Further, reference numeral 13B shown in FIGS. 2 and 3 is the tip of the connection portion 13A in the gas supply pipe 13. As is clear from FIG. 2, the tip 13B in the connection portion 13A is positioned inside the supply pipe side connection portion 42 of the gas introduction port portion 40. That is, in the present embodiment, the connection portion 13A of the gas supply pipe 13 is connected to the supply pipe side connection portion 42 so that the tip 13B is not inserted up to the bag side connection portion 44 in the gas introduction port portion 40. The connection portion 13A of the gas supply pipe 13 is connected to the supply pipe side at the gas introduction port 40 if the gas flowing through the gas supply pipe 13 is prevented from leaking from the gap with the supply pipe side connection portion 42. It may be extrapolated to the portion 42.

Reference numeral 46 shown in FIG. 3 is a shutoff valve disposed inside the airbag main body 30. The shutoff valve 46 is arranged at the second connection port 43 of the bag-side connection portion 44 in the gas introduction port portion 40, and the opening and closing of the second connection port 43 can be switched by the shutoff valve 46. In other words, the shutoff valve 46 can switch between communication and shutoff between the gas flow path 40A in the gas inlet portion 40 and the internal space 30B of the airbag main body 30.

The shutoff valve 46 in this embodiment is configured by, for example, a check valve (backflow prevention valve). The check valve has a valve structure in which the valve body operates so as to prevent backflow due to the back pressure of the fluid. FIG. 3 shows a state in which the shutoff valve 46 closes the second connection port 43 of the gas introduction port 40. As shown in FIG. 3, the shutoff valve 46 has a valve body 46A and a hinge portion 46B. The hinge portion 46B of the shutoff valve 46 is attached to, for example, the second connection port 43 of the gas introduction port portion 40, and holds the valve body 46A so as to be openable and closable. Here, when the pressure (primary side pressure) of the gas flow path 40A in the gas introduction port 40 is lower than or equal to the pressure (secondary side pressure) of the internal space 30B of the airbag main body 30, the figure shows. As shown in 3, the valve body 46A of the shutoff valve 46 closes the second connection port 43 (gas introduction opening 30A of the airbag main body 30) of the gas introduction port 40. In this state, the valve body 46A of the shutoff valve 46 shuts off the gas flow path 40A in the gas introduction port 40 and the internal space 30B of the airbag main body 30.

FIG. 4 is a diagram illustrating a state in which the shutoff valve 46 according to the first embodiment opens the second connection port 43 of the gas introduction port portion 40. When the pressure (primary side pressure) of the gas flow path 40A in the gas inlet portion 40 is higher than the pressure (secondary side pressure) of the internal space 30B of the airbag body 30, the valve body 46A is changed from the state shown in FIG. Rotates around the hinge portion 46B as a fulcrum, and the valve body 46A opens as shown in FIG. That is, the second connection port 43 of the gas introduction port 40 (the gas introduction opening 30A of the airbag body 30) is opened, and the gas flow path 40A in the gas introduction port 40 and the internal space 30B of the airbag body 30 communicate with each other. It becomes a state.

In the airbag device 10 configured as described above, for example, when a vehicle collision is detected by the collision sensor 210, the airbag ECU 20 operates the gas generator 12. The gas discharged from the gas generator 12 by operating the gas generator 12 is supplied to the airbag 11 through the gas supply pipe 13. That is, the gas flowing through the gas supply pipe 13 is supplied to the gas introduction port 40 of the airbag 11 to which the connection portion 13A is connected. As a result, the pressure (primary side pressure) of the gas flow path 40A in the gas inlet portion 40 becomes higher than the pressure (secondary side pressure) of the internal space 30B of the airbag main body 30, as shown in FIG. The valve body 46A of the shutoff valve 46 opens. As a result, the second connection port 43 of the gas introduction port 40 is opened, and the gas flow path 40A in the gas introduction port 40 and the internal space 30B of the airbag body 30 communicate with each other, whereby the internal space of the airbag body 30 is communicated. Gas is introduced into 30B. The airbag body 30 expands due to the gas supplied through the gas supply pipe 13 and the gas introduction port 40, and rapidly deploys toward the vehicle interior. This makes it possible to protect the occupants of the vehicle.

As described above, the airbag 11 in this embodiment includes a shutoff valve 46. Therefore, when the supply of gas to the airbag 11 through the gas supply pipe 13 is stopped or weakened, the pressure (primary side pressure) of the gas flow path 40A in the gas introduction port 40 becomes the internal space 30B of the airbag body 30. It becomes lower than the pressure of (secondary side pressure). As a result, the valve body 46A of the shutoff valve 46 closes the second connection port 43 of the gas introduction port 40, so that the gas flow path 40A in the gas introduction port 40 and the internal space 30B of the airbag body 30 are shut off. It is maintained in the same state.

By the way, according to the airbag device 10 in the present embodiment, as described above, the fragile portion 45 is provided at the boundary between the supply pipe side connection portion 42 and the bag side connection portion 44 in the gas supply pipe 40. Therefore, the occupant of the vehicle applies an external force to the fragile portion 45 of the gas inlet portion 40 connected to the airbag main body 30 by pulling the airbag main body 30 after being deployed in the vehicle interior, thereby applying an external force to the fragile portion 45. The bag side connection portion 44 can be separated from the supply pipe side connection portion 42 at the boundary of the above. That is, the occupant of the vehicle can easily remove the deployed airbag body 30 from the gas supply pipe 13. FIG. 5 is a diagram showing a state in which the airbag main body 30 after deployment is removed from the gas supply pipe 13 according to the first embodiment.

At that time, as shown in FIG. 5, the shutoff valve 46 in the airbag 11 closes the second connection port 43 of the gas introduction port 40 by the valve body 46A, and the gas flow path 40A in the gas introduction port 40 And the internal space 30B of the airbag body 30 is maintained in a blocked state. Therefore, when the airbag main body 30 expanded by the gas generated by the gas generator 12 is separated from the gas supply pipe 13 in a deployed state, the gas flows back to the outside from the internal space 30B of the airbag main body 30 and leaks. It can be suppressed from being put out.

As a result, the airbag main body 30 separated from the gas supply pipe 13 can be used alone while being maintained in the expanded and expanded state. Therefore, according to the airbag device 10 in the present embodiment, for example, the airbag main body 30 after being separated from the gas supply pipe 13 can be used as a buoyant body for rescue of personnel in the event of a water accident.

In the airbag device 10 of the present embodiment, at least the gas supply pipe 13 is separated from the gas introduction port 40 after the introduction of gas from the gas introduction port 40 into the airbag 11 (airbag main body 30) is started. At that time, the shutoff valve 46 may be configured to suppress the outflow of gas from the inside of the airbag 11 (airbag main body 30) to the outside by closing the gas introduction port 40.

Further, according to the airbag device 10 of the present embodiment, the expanded airbag 11 can be detached from the gas supply pipe 13 while the gas generator 12 and the gas supply pipe 13 are left on the vehicle side. Therefore, the airbag 11 after being separated from the gas supply pipe 13 is lightweight and can be easily transported by hand.

In the airbag device 10 of the present embodiment, the case where the airbag 11 is applied to the side airbag has been described as an example, but even if the head of the occupant is applied to the protective airbag or other airbags. good. Of course, the airbag device 10 may include a plurality of airbags 11, and each of the plurality of airbags 11 may be configured to be detachable from the gas supply pipe 13.

Further, the airbag device 10 in the present embodiment includes a submersion detection sensor 220 and an operation switch 230 in addition to the collision sensor 210. Therefore, when the submersion detection sensor 220 detects the submersion of the vehicle, or when the operation switch 230 receives the operation request of the airbag from the occupant, the vehicle collides with an obstacle by using it as a trigger. Even if it is not, the gas generator 12 can be operated to inflate and expand the airbag main body 30. According to this, even when the vehicle is submerged without impact, the airbag main body 30 can be quickly expanded and deployed and used as a buoyant body for rescue of personnel.

When the airbag device 10 includes a plurality of airbags 11 that can be detached from the gas supply pipe 13, when the submersion detection sensor 220 detects the submersion of the vehicle, or the operation switch 230 is from the occupant. When the operation request of the airbag is received, all the airbags 11 may be deployed. The algorithm for detecting the submersion of the vehicle by using the submersion detection sensor 220 is not particularly limited. The submersion detection sensor 220 may be, for example, a sensor that detects inundation in the vehicle interior, or may be a sensor that detects inundation in the engine room of the vehicle. Further, the submersion detection sensor 220 may be a sensor that detects that a certain level or more of water pressure acts on the entire predetermined region outside the vehicle. Regarding the operation switch 230, from the viewpoint of suppressing the malfunction of the airbag 11 unintentionally by the occupant, when the occupant operates a plurality of switches at the same time or when the occupant continuously operates the switch for a certain period of time or longer ( For example, the airbag ECU 20 may deploy the airbag 11 by accepting an operation request from the occupant only by pressing and holding the switch for a long time. Alternatively, the airbag ECU 20 may deploy the airbag 11 triggered by the submersion detection sensor 220 detecting the submersion of the vehicle and the actuation switch 230 receiving the operation request of the airbag from the occupant.

Although the airbag device 10 in this embodiment is mounted on a vehicle, the vehicle referred to here is not limited to the body (chassis) of the vehicle, but also components (seats, dashboards, etc.) attached to the body. Needless to say, it is included. Further, in the present embodiment, the embodiment in which the airbag device 10 according to the present disclosure is mounted on a vehicle has been described as an example, but the application target is not limited to this. Of course, the airbag device 10 is not limited to passenger cars, but can also be applied to motorcycles. Further, the airbag device 10 in the present embodiment has a occupant protection function in the event of a vehicle collision, but is not limited to this, and may be provided as an airbag device for personnel rescue in the event of a water accident or the like.

Although the embodiments of the airbag device according to the present disclosure have been described above, each aspect disclosed in the present specification can be combined with any other features disclosed in the present specification.

1 ... Vehicle seat 2 ... Seat cushion 3 ... Seat back 4 ... Headrest 10 ... Airbag device 11 ... Airbag 12 ... Gas generator 13 ... Gas supply Tube 20 ... Airbag ECU
30 ... Airbag body 40 ... Gas introduction port 41 ... First connection port 42 ... Supply pipe side connection part 43 ... Second connection port 44 ... Bag side connection part 45 ...・・ Vulnerable part 46 ・・・ Shutoff valve 210 ・・・ Collision sensor 220 ・・・ Submersion detection sensor 230 ・・・ Operation switch

Claims

With a gas generator
An airbag that has a gas inlet and expands by introducing gas supplied from the gas generator into the inside from the gas generator when the gas generator operates.
A gas supply pipe connecting the gas generator and the gas inlet portion,
Equipped with
The gas supply pipe is detachably connected to the gas inlet portion and is connected to the gas supply pipe.
The airbag is provided from the inside to the outside by closing the gas introduction port at least when the gas supply pipe is separated from the gas introduction port after the start of gas introduction from the gas introduction port to the inside. Has a shut-off valve, which suppresses the outflow of gas.
Airbag device.
The gas inlet portion has a supply pipe side connection portion having a first connection port connected to the gas supply pipe on one end side, and a second connection port connected to the gas introduction opening of the airbag on the other end side. Is a tubular member that includes a bag-side connection with
In the gas introduction port, a fragile portion is formed between the supply pipe side connection portion and the bag side connection portion, and the supply pipe side connection portion can be separated from the bag side connection portion with the fragile portion as a boundary. And the shutoff valve is arranged at the bag side connection portion.
The airbag device according to claim 1.
The airbag device according to claim 2, wherein the shutoff valve is arranged at the second connection port.
The airbag device according to claim 2 or 3, wherein the gas supply pipe is inserted into the supply pipe side connection portion, and the tip of the gas supply pipe is located inside the supply pipe side connection portion.
The air according to any one of claims 1 to 4, wherein the airbag device is mounted on a vehicle, and the airbag is provided so as to be deployable toward the vehicle interior when the gas generator is operated. Bag device.
In addition to the collision sensor for detecting the collision of the vehicle and operating the gas generator, the operation switch for receiving the operation request of the gas generator from the occupant, and the gas generation by detecting the submersion of the vehicle. Equipped with at least one of the submersion sensors for operating the vessel,
The airbag device according to claim 5.