JP5233974B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag apparatus including a first bag that restrains an upper body of an occupant and a second bag that restrains a knee.

  An airbag device is known in which an airbag for restraining a knee is connected to an airbag for restraining the upper body of an occupant (for example, see Patent Document 1). There is also known an airbag device that simultaneously inflates and deploys an airbag for restraining the upper body of an occupant and an airbag for restraining a knee by gas supply from a common pressure accumulator (for example, , See Patent Document 2).

Japanese Utility Model Publication No.7-17662 JP-A-51-23917

  By the way, since the airbag for restraining the knee folded together with the airbag for restraining the upper body is deployed downward from the upper side in the vehicle vertical direction, the airbag for restraining the knee. There is room for improvement in deploying the vehicle between the instrument panel and the occupant's knees.

  An object of the present invention is to obtain an airbag device that can satisfactorily deploy the second bag folded together with the first bag between the instrument panel and the occupant's knee.

The airbag device according to the first aspect of the present invention is folded on the opposite side of the vehicle compartment side with respect to the instrument panel, and is inflated and deployed on the vehicle compartment side with respect to the instrument panel by receiving gas supply. A first bag that restrains the occupant's upper body from the front side in the longitudinal direction of the vehicle, and a volume that is smaller than that of the first bag, is folded together with the first bag, and receives the gas supply to the passenger compartment side A second bag that restrains the occupant's knee from the front side in the vehicle front-rear direction, and a flexible regulating member for regulating the deployment thickness of the second bag in the vehicle front-rear direction When folded together with the first bag and the second bag is deployed by the gas supplied from the inflator in said first bag and the second bag, said inflator Gas from the inflator and the al gas the first supply unit for supplying to the first bag, through the gas supply port to be directed Ke opening the instrument panel side within the second bag by said regulating member in a deployed state And a flexible gas flow path member having a second supply part for supplying the second bag to the second bag.
The airbag device according to the invention of claim 2 is folded on the opposite side to the vehicle compartment side with respect to the instrument panel, and is inflated and deployed on the vehicle compartment side with respect to the instrument panel by receiving gas supply. A first bag that restrains the occupant's upper body from the front side in the longitudinal direction of the vehicle, and a volume that is smaller than that of the first bag, is folded together with the first bag, and receives the gas supply to the passenger compartment side The second bag that restrains the occupant's knee from the front side in the vehicle front-rear direction is folded together with the first bag and the second bag, and is folded in the first bag by supplying gas from the inflator. And a first supply part which is deployed in the second bag and supplies the gas from the inflator to the first bag, and the second supply in the deployed state. A flexible gas flow path member having a second supply part that supplies gas from the inflator to the second bag through a gas supply port that opens toward the instrument panel in the bag. The gas flow path member extends rearward in the vehicle front-rear direction and upward in the vehicle vertical direction by gas supply from the inflator, and folded back to the front side in the vehicle front-rear direction and lower in the vehicle vertical direction. The second supply part is configured as a part including a tip side with respect to the folded part in the gas flow path member, and the first supply part is configured as a part located on the inflator side with respect to the second supply part in the previous period. Has been.
According to a third aspect of the present invention, in the airbag apparatus according to the second aspect, the second supply part of the gas flow path member regulates a deployment thickness of the second bag in the vehicle front-rear direction. For this reason, the gas supply port is developed in a posture in which the gas supply port is opened toward the instrument panel.

In the airbag apparatus according to claim 1 or 2 , when gas is supplied from an inflator, for example, at the time of a frontal collision of a vehicle, the gas flow path member is expanded and deployed by the gas from the inflator. Gas is supplied from the first supply part of the gas flow path member to the first bag, and gas is supplied from the second supply part to the second bag. Thereby, the first bag and the second bag are inflated and deployed, respectively. At this time, the second bag having a relatively small volume is deployed before the first bag. Then, the deployed second bag restrains the occupant's knee, and the deployed first bag restrains the occupant's upper body.

  Here, in this airbag apparatus, the gas from an inflator is supplied in the 2nd bag from the gas supply port opened toward the instrument panel side in the 2nd supply part expand | deployed in the 2nd bag. . Thereby, gas is supplied in the 2nd bag, being blown out toward the instrument panel side from the 2nd supply part. For this reason, the second bag is easily deployed along the instrument panel, and can be deployed so that the second bag is inserted between the instrument panel and the occupant's knee.

Thus, in the airbag device according to claim 1 and claim 2 , the second bag folded together with the first bag can be satisfactorily deployed between the instrument panel and the occupant's knee.

The airbag apparatus according to the invention of claim 4 is the airbag apparatus according to any one of claims 1 to 3 , wherein the second supply part of the gas flow path member is the instrument panel. The gas is developed in a posture in which gas is ejected from the gas supply port along a direction intersecting with the surface of a portion located forward of the knee in the vehicle longitudinal direction.

In the airbag device according to the fourth aspect , the gas is supplied obliquely to the instrument panel surface from the second supply part of the gas flow path member toward the instrument panel. For this reason, compared with the case where gas is supplied along the direction which makes a right angle with an instrument panel, for example, the attitude which the 2nd supply part spouts gas toward an instrument panel becomes easy to be maintained. Further, since the gas is ejected downward from the second supply unit, which is the deployment direction, the downward deployment of the second bag is promoted.

In the airbag device according to claim 1 and claim 3, the regulating member that regulates the deployment thickness of the second bag has a posture in which the second supply unit injects gas toward the instrument panel in the second bag. Also, this posture can be maintained.

In the airbag device according to the second aspect , the gas flow path member is deployed from the front side (opposite vehicle compartment side) to the rear upper side with respect to the instrument panel and folded back to the front lower side. The front end side of the folded portion of the gas flow path member is a second supply section, and at least a part of the remaining portion of the gas flow path member is a first supply section. In the configuration in which the gas is supplied to the second bag from the upper side (above the knee) as described above, the gas is supplied to the second bag while blowing the gas from the second supply unit toward the instrument panel as described above. By doing so, the second bag can be satisfactorily deployed between the instrument panel and the occupant's knee.

  As described above, the airbag device according to the present invention has an excellent effect that the second bag folded together with the first bag can be successfully deployed between the instrument panel and the occupant's knee. Have.

It is a sectional side view which shows the deployment state of the airbag in the airbag apparatus which concerns on embodiment of this invention. It is side sectional drawing which expands and shows the airbag which comprises the airbag apparatus which concerns on embodiment of this invention. It is a back sectional view showing the deployment state of the airbag in the airbag device concerning the embodiment of the present invention.

  A passenger seat airbag apparatus 10 as an airbag apparatus according to an embodiment of the present invention will be described with reference to FIGS. In addition, arrow FR, arrow UP, and arrow W appropriately described in each figure respectively indicate the vehicle V to which the passenger seat airbag device 10 is applied, the vehicle front direction (traveling direction), the upward direction, and the vehicle width direction of the passenger seat 12. Is shown. Further, in the following description, when the shape of the airbag 20 (its constituent part) is described, the shape in the inflated and deployed state is referred to unless otherwise specified.

  FIG. 1 is a schematic side cross-sectional view of a front portion in a passenger compartment C of an automobile V in an operating state of a passenger seat airbag device 10. As shown in this figure, a passenger seat 12 as a vehicle seat is disposed in the front part of the passenger compartment C. The passenger seat 12 includes a seat cushion 12A for the occupant P to sit forward and a seat back 12B that supports the seated occupant P seated on the seat cushion 12A from the rear of the vehicle.

  A windshield glass 14 that defines the front end of the vehicle in the passenger compartment C is disposed in front of the passenger seat 12. An instrument panel 16 is provided below the vehicle with respect to the windshield glass 14. The instrument panel 16 protrudes toward the passenger seat 12, and the seated occupant P seated on the passenger seat 12 puts his / her feet into the space below the instrument panel 16. Therefore, the seated occupant P seated on the passenger seat 12 brings the knee K close to the instrument panel 16 (lower panel 54 described later) in the seated posture.

  The passenger seat airbag apparatus 10 includes an airbag module 18 disposed in the instrument panel 16. The airbag module 18 mainly includes an airbag 20 described in detail later, an inflator 22 for supplying gas to the airbag 20, and an airbag case 24 holding (partially containing) the airbag 20 and the inflator 22. It is configured as a part. The airbag module 18 is held by an attachment portion 16 </ b> A provided on the instrument panel 16 in the airbag case 24.

  In this embodiment, as shown in FIG. 1, the airbag 20 includes a main bag 26 as a first bag for protecting the upper body U of the seated occupant P and a subbag as a second bag for protecting the knee K. 28. For this reason, in the passenger seat airbag device 10, the airbag module 18 is provided in the vicinity of the rearmost portion of the vehicle in the instrument panel 16 so as to face the vehicle rearward and upward. Specifically, in the airbag device 10 for the passenger seat, the airbag case 24 of the airbag module 18 is held by the mounting portion 16A of the instrument panel 16 in a posture that opens toward the rear of the vehicle and upward of the vehicle. Yes.

  The airbag case 24 holds (partially accommodates) the airbag 20 in a folded state as shown by a two-dot chain line in FIG. The airbag 20 is kept in a folded state by being wrapped in a holding sheet or the like (not shown). The inflator 22 is fixedly held by the airbag case 24 in a state in which a part including the gas ejection port 22 </ b> A is inserted into the airbag 20. In this embodiment, the inflator 22 is a so-called disk-type inflator, and a sufficient gas capacity is ensured for the airbag 20 having the main bag 26 and the subbag 28 as described above.

  The main bag 26 of the airbag 20 is inflated and deployed between the windshield glass 14 and the instrument panel 16 and the upper body U of the seated occupant P so as to restrain the relative movement of the upper body U toward the front of the vehicle. It has become. In this embodiment, a vent hole 25 for adjusting internal pressure is formed in the main bag 26. The sub bag 28 is inflated and deployed between the instrument panel 16 and the knee K, and restrains the relative movement of the knee K forward of the vehicle. The main bag 26 and the sub bag 28 of the airbag 20 are integrally configured as shown in FIGS.

  Specifically, the main bag 26 is formed so as to be inflated and deployed in a bag shape by a base cloth 30 that constitutes an upper portion and an intermediate portion of the airbag 20 in the vehicle vertical direction. In this embodiment, the main bag 26 is a so-called twin chamber structure airbag in which left and right bags adjacent in the vehicle width direction are connected as shown in FIG. The main bag 26 is formed such that the rear ends of the left and right bags (chambers) restrain the left and right shoulders (or the vicinity thereof) of the seated occupant P, respectively.

  The sub bag 28 is formed in a bag shape that opens upward in the vehicle with the base cloth 32, and the opening edge is joined to the vehicle lower opening edge of the main bag 26 by sewing or the like. Thereby, the airbag 20 has comprised the big bag shape as a whole. The base fabric 32 is different from the base fabric 30 in that the surface is subjected to a texture seal process such as a silicon coat, and prevents gas leakage from the main bag 26 via the texture (suppresses the base fabric 30). ). The silicon coat for holding the internal pressure of the sub bag 28 is preferably applied to the inner surface of the sub bag 28 from the viewpoint of preventing gas leakage.

  As described above, the airbag 20 deployed as a large bag as a whole has a tether 34 as a cloth-like material for partitioning (separating) the interior into a chamber of the main bag 26 and a chamber of the subbag 28. The tether 34 has a cloth shape and regulates the expansion of the sub bag 28 in the vehicle front-rear direction as shown in FIGS. 1 and 2. In this embodiment, the tether 34 is joined to the sewing part of the base fabric 30 and the base fabric 32 by sewing etc. as shown in FIG.

  Further, as shown in FIGS. 2 and 3, the expansion (thickness) of the sub-bag 28 in the vehicle front-rear direction is restricted at a portion that is substantially in the middle in the vehicle vertical direction when deployed in the sub-bag 28. A tether 52 as a regulating member is provided. The tether 52 is formed with a through hole 52A (see FIG. 3), and the through hole 52A communicates the upper chamber 28U and the lower chamber 28L located above the tether 52 in the sub bag 28. .

  The airbag 20 constituting the passenger seat airbag apparatus 10 includes an inner tube 35 as a flexible gas flow path member that guides the gas of the inflator 22 to the main bag 26 and the subbag 28. The inner tube 35 is opened by a base fabric 36, which is the same fabric as the base fabric 30, independent of the main bag 26 and the sub bag 28, in front of the vehicle and downward of the vehicle, as shown in FIG. It is configured as a bag body that is expanded and deployed in a substantially “U” shape. Specifically, the inner tube 35 includes an upper portion 35U that extends in the opening direction from the airbag case 24 that opens toward the rear of the vehicle and toward the upper side of the vehicle as described above, and from the upper portion 35U to the front of the vehicle and the lower side of the vehicle. A lower part 35L that is unfolded so as to be folded is configured as a main part.

  A lower portion 35L of the inner tube 35 penetrates the tether 34, and a gas supply port 40A of a second supply portion 40 to be described later for supplying gas to the sub bag 28 is formed at the tip thereof. On the other hand, in the vicinity of the folded portion of the lower portion 35L in the upper portion 35U of the inner tube 35, that is, on the main bag 26 side with respect to the tether 34, a gas supply port of a first supply portion 38 described later for supplying gas to the main bag 26. 38A is formed. In this embodiment, as shown in FIG. 3, the gas supply port 38 </ b> A is formed as a through hole penetrating the base cloth 36 on both sides in the vehicle width direction of the upper portion 35 </ b> U of the inner tube 35. As a result, in the passenger airbag device 10, gas is supplied into the main bag 26 from the upper portion 35U of the inner tube 35 toward both sides in the vehicle width direction.

  In the passenger airbag device 10, a check valve (one-way valve) 42 is formed around the gas supply port 40 </ b> A in the lower portion 35 </ b> L of the inner tube 35 as gas discharge suppression means. The check valve 42 includes a cloth piece 42A that covers the gas supply port 40A from the inside of the sub bag 28, and allows gas supply to the sub bag 28 from the upper portion 35U through the gas supply port 38A. On the other hand, the check valve 42 is configured such that when the internal pressure (dynamic pressure) of the sub bag 28 becomes higher than the internal pressure of the upper portion 35U, the cloth piece 42A closes the gas supply port 38A by the internal pressure. In order to facilitate understanding of the configuration of the check valve 42, FIG. 1 shows a closed state of the gas supply port 40A, which is a non-operating state of the check valve 42, and FIGS. 2 and 3 show gas supply by the check valve 42. The opening state of the opening 40A is illustrated.

  The inner tube 35 of the airbag 20 described above is folded together with the main bag 26 and the subbag 28 and accommodated in the airbag case 24, and inflated and deployed as described above by the gas supply from the inflator 22, The gas from the inflator 22 is guided to the main bag 26 and the sub bag 28. In the inner tube 35, a portion including the gas supply port 38A in the upper portion 35U serves as a first supply portion 38 that supplies gas to the main bag 26, and a portion including the gas supply port 40A in the lower portion 35L is second. The supply unit 40 is used. In other words, at least a portion of the inner tube 35 on the distal end side of the folded portion is the second supply portion 40, and at least a portion of a portion located on the upstream side (inflator 22) side in the gas flow direction with respect to the second supply portion 40. Is the first supply unit 38. The deployed shape of the second supply unit 40 is set such that the gas supply port 40A is positioned above the knee K or at the same position as the knee K in the vehicle vertical direction.

  In the passenger seat airbag device 10, the second supply part 40 of the inner tube 35 is configured to be deployed in the subbag 28 so that the gas supply port 40 </ b> A faces the instrument panel 16. As a result, in the passenger seat airbag device 10, gas is ejected from the second supply unit 40 toward the instrument panel 16. In this embodiment, a portion forming the second supply unit 40 in the lower portion 35L is configured to supply gas to the lower chamber 28L in the sub bag 28 through the tether 52. The second supply unit 40 is configured to eject gas toward the lower panel 54 of the instrument panel 16 by the deployment posture being restricted by the tether 52.

  More specifically, the second supply unit 40 is opposed to the lower panel 54 that is tilted backward (curved) by the tether 52 (and the tether 34) so as to be positioned in front of the vehicle toward the lower side in the instrument panel 16. As shown by an arrow G in FIG. 2, the gas is ejected obliquely from the upper rear side. That is, the second supply part 40 of the inner tube 35 is configured to be deployed in a posture in which the gas supply port 40A faces both the lower panel 54 and the vehicle lower side under the restriction of the tether 52.

  As shown in FIG. 1, an airbag door 50 that is broken and opened by the inflation and deployment pressure of the airbag 20 is formed in a portion of the instrument panel 16 to which the airbag module 18 is attached. The airbag door 50 according to this embodiment is opened up and down around the hinge portion when the instrument panel 16 is cleaved at a groove-like tear line formed on the inner surface thereof, and the instrument panel 16 has an opening. It comes to form. Through this opening, the airbag 20 is allowed to be expanded and deployed outside the instrument panel 16, that is, into the passenger compartment C.

  In the passenger-side airbag device 10 described above, for example, when a frontal collision of the vehicle V is detected or predicted to be unavoidable based on an output of a collision sensor (not shown), an airbag as a control device (not shown) is used. The ECU operates the inflator 22.

  Next, the operation of this embodiment will be described.

  In the passenger airbag device 10 configured as described above, when a frontal collision of the automobile V is detected or predicted based on a signal from the collision sensor, the airbag ECU activates (ignites) the inflator 22. Then, the airbag 20 that has received the gas supply from the inflator 22 is inflated in the instrument panel 16, and inflated and deployed in the vehicle compartment C through an opening formed by deploying the airbag door 50 with the deployment pressure. .

  At this time, the inner tube 35 supplied with the gas from the inflator 22 is first expanded and deployed. The gas from the inflator 22 is supplied to the main bag 26 through the gas supply port 38A formed in the first supply part 38 (upper part 35U) of the inner tube 35 and is formed in the second supply part 40 (lower part 35L). The gas is supplied to the sub bag 28 through the gas supply port 40A. In the sub bag 28, the gas supplied to the lower chamber 28L is supplied to the upper chamber 28U through the through hole 52A of the tether 52.

  Then, the sub bag 28 is inflated and deployed between the instrument panel 16 and both knees K of the occupant P by the gas supply through the gas supply port 40 </ b> A of the second supply unit 40 in the inner tube 35. On the other hand, the deployment of the main bag 26 having a relatively large capacity is completed in front of the vehicle with respect to the upper body U of the occupant P after the deployment of the sub bag 28 is completed.

  The sub bag 28 restrains the knee K of the seated occupant P seated on the passenger seat 12 and reduces the load acting on the knee K from the instrument panel 16 side. That is, the knee K of the seated occupant P is protected. In particular, in the airbag device 10 for the passenger seat, since the check valve 42 is provided on the gas supply port 40A side in the lower portion 35L of the inner tube 35, the internal pressure of the sub bag 28 increases as the knee K is restrained. The check valve 42 closes the gas supply port 40A. For this reason, a decrease in the internal pressure (gas discharge) of the sub-bag 28 accompanying the restraint of the knee K is suppressed, and the knee K of the seated occupant P is better protected.

  On the other hand, the upper body U of the occupant P is restrained by the inflated and deployed main bag 26 and absorbs shock. Accordingly, the passenger P is well protected by the passenger seat airbag device 10. In particular, in the passenger seat airbag apparatus 10, gas is supplied toward both sides in the vehicle width direction in the main bag 26 through the left and right gas supply ports 38A. For this reason, compared with the configuration in which gas is supplied to the rear of the vehicle, the deployment force (deployment speed) of the main bag 26 toward the rear of the vehicle is suppressed, and the load is reduced when restraining the upper body U of the seated occupant P. Is done.

  As described above, in the passenger seat airbag apparatus 10, the inner tube 35 is provided in the airbag 20 including the main bag 26 and the subbag 28. Gas is supplied directly (independently) to each of the main bag 26 and the sub-bag 28. Accordingly, in the passenger seat airbag device 10, the sub-bag 28 having a relatively small capacity is inflated and deployed in a short time from the operation of the inflator 22. Therefore, in the airbag device 10 for the passenger seat, the sub bag 28 can be inflated and deployed in a short time from the detection of the frontal collision in front of the vehicle with respect to the knee K of the seated occupant P with a small space (stroke) in the vehicle longitudinal direction. it can.

  Here, in the passenger airbag device 10, the second supply portion 40 of the inner tube 35 is deployed in a posture in which the gas supply port 40 </ b> A faces the instrument panel 16 in the subbag 28. Then, the gas from the inflator 22 is ejected toward the instrument panel 16 from the gas supply port 40 </ b> A of the second supply unit 40. For this reason, in the passenger seat airbag device 10, the sub-bag 28 is easily deployed along the lower panel 54 (rear surface) of the instrument panel 16. As a result, the sub bag 28 is unfolded while entering the narrow gap between the lower panel 54 of the instrument panel 16 and the knee K.

  As described above, in the passenger seat airbag device 10 according to the present embodiment, since the airbag case 24 is housed integrally with the main bag 26, the sub-deployment is performed downward from above the vehicle with respect to the knee K of the seated occupant P. The bag 28 can be satisfactorily deployed between the lower panel 54 of the instrument panel 16 and the knee K of the occupant P. In particular, in the configuration in which the inner tube 35 has the upper portion 35U that is deployed upward and rearward from the airbag case 24, the sub bag 28 is further deployed downward from above the vehicle. The sub bag 28 can be satisfactorily deployed between the lower panel 54 and the knee K of the occupant P by the configuration in which gas is ejected from the second supply unit 40 toward the instrument panel 16 side.

  In particular, in the passenger airbag device 10, the gas is ejected obliquely from the gas supply port 40 </ b> A of the second supply unit 40 to the lower panel 54, so that the second gas is ejected at a right angle to the lower panel 54, for example. The supply unit 40 is unlikely to receive a reaction force due to gas pressure. For this reason, the 2nd supply part 40 tends to maintain the attitude | position which spouts gas toward the lower panel 54. FIG. In addition, since the gas is ejected obliquely downward from the gas supply port 40A, the downward expansion of the sub bag 28 (the dive into the gap between the lower panel 54 and the knee K) is promoted.

  Further, the posture in which the gas supply port 40A of the second supply unit 40 (inner tube 35) faces the instrument panel 16 side is realized and maintained by the tether 52 for regulating the deployed thickness of the sub bag 28. Therefore, the sub-bag 28 can be satisfactorily deployed between the lower panel 54 of the instrument panel 16 and the knee K of the occupant P without providing an additional member as described above. In addition, since the second supply unit 40 passes the tether 52 and supplies gas directly to the lower chamber 28L, the sub bag 28 is preceded by the development on the front end side, and the sub bag 28 is developed downward. (Dive into the gap between the lower panel 54 and the knee K) is promoted.

  In the above-described embodiment, the example in which the deployment posture of the second supply unit 40 (inner tube 35) is regulated by the tether 52 has been described, but the present invention is not limited to this, and for example, the main bag 26 or the sub A strap that is deployed (stretched) in the vehicle width direction in the bag 28 and is wound around the second supply unit 40, both ends are supported by the end portion on the inflator 22 side of the airbag 20, and the folded portion of the inner tube 35 is It is good also as a structure by which the deployment attitude | position of the 2nd supply part 40 (inner tube 35) is controlled by the tether 52 by additional (exclusive) parts, such as a strap wound around the 2nd supply part 40. FIG.

  In the above-described embodiment, the second supply unit 40 of the inner tube 35 is deployed in a posture in which the gas from the gas supply port 40A is ejected in the direction of the arrow G inclined with respect to the lower panel 54. However, the present invention is not limited to this, and for example, the second supply unit 40 may be deployed in a posture in which gas is ejected from the gas supply port 40A in a direction substantially perpendicular to the lower panel 54.

  Furthermore, in the above-described embodiment, the example in which the check valve 42 is provided as the internal pressure holding (gas discharge suppression) means of the sub-bag 28 is shown, but the present invention is not limited to this, for example, as the internal pressure holding means, You may employ | adopt the string etc. which close the lower part 35L of the inner tube 35 with expansion | swelling of the main bag 26 or the subbag 28, and expansion | deployment.

  Furthermore, in the above-described embodiment, an example in which the sub bag 28 is deployed before the main bag 26 due to a difference in capacity between the main bag 26 and the sub bag 28 to which the gas from the inflator 22 is directly supplied. Although shown, the present invention is not limited to this. For example, the gas supply port 38A is closed with a tear seam or the like that is broken by a gas pressure of a predetermined value or more, and the inner pressure of the inner tube 35 is increased (the sub bag 28). A deployment delay structure in which the deployment of the main bag 26 is started in the deployment process or after the deployment is completed) may be provided.

  In the above-described embodiment, an example in which the main bag 26 is a so-called twin-chamber airbag in which the left and right bags are connected is shown. However, the present invention is not limited to this, and for example, the main bag 26 is a single bag. It is good also as a structure which is what is called a single chamber structure airbag which has one chamber.

  Further, in each of the above-described embodiments, the example in which the airbag apparatus according to the present invention is applied to the airbag apparatus 10 for the passenger seat is shown. However, the present invention is not limited to this, for example, the airbag apparatus according to the present invention. The bag device can be applied to a seat in the center in the vehicle width direction among seats in which three passengers can be seated in the vehicle width direction. Further, such a central seat can be regarded as being included in the passenger seat in the present invention.

10 Airbag Device for Passenger Seat 20 Airbag 22 Inflator 26 Main Bag (First Bag)
28 Sub bag (second bag)
35 Inner tube (gas flow path member)
38 1st supply part 40 2nd supply part 40A Gas supply port 52 Tether (regulation member)

Claims (4)

Folded on the opposite side of the vehicle compartment side to the instrument panel, receives the gas supply, and expands and deploys on the vehicle compartment side of the instrument panel, thereby restraining the upper body of the vehicle occupant from the front side in the vehicle longitudinal direction A first bag;
The capacity is smaller than that of the first bag, and is folded together with the first bag. The gas supply is inflated and deployed on the vehicle compartment side of the instrument panel, so that the occupant's knees are moved in the vehicle longitudinal direction. A second bag restrained from the front side;
A flexible regulating member for regulating a deployment thickness of the second bag in the vehicle front-rear direction;
A first supply unit that is folded together with the first bag and the second bag, is deployed in the first bag and the second bag by gas supply from the inflator, and supplies gas from the inflator to the first bag. with the, and said regulating member by said second said in bag instrument panel side and toward Ke gas the second first supplied to the bag 2 supply unit from the inflator through the gas supply port opening in a deployed state A flexible gas flow path member;
An airbag device comprising: Folded on the opposite side of the vehicle compartment side to the instrument panel, receives the gas supply, and expands and deploys on the vehicle compartment side of the instrument panel, thereby restraining the upper body of the vehicle occupant from the front side in the vehicle longitudinal direction A first bag;
The capacity is smaller than that of the first bag, and is folded together with the first bag. The gas supply is inflated and deployed on the vehicle compartment side of the instrument panel, so that the occupant's knees are moved in the vehicle longitudinal direction. A second bag restrained from the front side;
A first supply unit that is folded together with the first bag and the second bag, is deployed in the first bag and the second bag by gas supply from the inflator, and supplies gas from the inflator to the first bag. And a second supply part that supplies gas from the inflator to the second bag through a gas supply port that opens toward the instrument panel in the second bag in the deployed state. A channel member;
Equipped with a,
The gas flow path member is expanded so as to extend rearward in the vehicle longitudinal direction and upward in the vehicle vertical direction by the gas supply from the inflator and folded back to the front side in the vehicle longitudinal direction and downward in the vehicle vertical direction. And
The second supply part is configured as a part including a tip side with respect to a folded part in the gas flow path member,
The airbag device is configured such that the first supply unit is located on the inflator side with respect to the second supply unit in the previous period . The gas supply port is opened toward the instrument panel by a flexible regulating member for regulating a deployment thickness of the second bag in the vehicle front-rear direction. airbag apparatus 請 Motomeko 2 wherein that will be deployed to the posture to be. The second supply part of the gas flow path member is a posture in which gas is ejected from the gas supply port along a direction intersecting with a surface of a portion of the instrument panel located in front of the vehicle front-rear direction with respect to the knee. The airbag device according to any one of claims 1 to 3, wherein the airbag device is deployed .

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