JPH09136600A - Chest and head integrating type air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly expand a second expansion area by withdrawing an arm of an occupant from the expansion locus of an air bag body by means of the air bag body if the arm is on a door belt line when the air bag body expands. SOLUTION: An air bag body 22 is provided with a breaking yarn 32 which inclines upward toward the front of the vehicle from near the underside 30A of a seatbelt 30 located above the shoulder 24C of the occupant 24. The air bag body 22 causes its first expansion area 34 to expand toward the front of the vehicle at the early stage of expansion and, if the arm 24D of the occupant 24 is on the belt line 38 of the vehicle, pushes the upper arm 24E out forward from behind. The breaking yarn 32 breaks on completion of the expansion of the first expansion area 34, allowing a second expansion area 36 to expand upward roughly along the seatbelt 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chest head-integrated airbag device, and more particularly to a chest head-integrated airbag provided with an airbag bag body which is deployed from the rear side of the occupant toward the front of the vehicle. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, a collision from the side of an automobile,
A chest-head-integrated airbag device is known, which deploys an airbag bag along a side portion of an occupant against a so-called side impact, and protects the occupant's chest and head at the same time. It is shown in Kaihei 5-162598.

As shown in FIG. 6, in this chest head-integrated air bag device, the side portion 70 of the side portion 70 inside the vehicle compartment.
When the airbag device 72 is attached to A, and the inflator 74 is activated, the airbag bag body 74 having a substantially I-shape in a side view is deployed as shown by the solid line in FIG. Upper part 74B while protecting the occupant's chest
Protects the occupant's head. In this device, the airbag body 74 is folded and housed in a serpentine shape in a front view as shown by an imaginary line in FIG.

Further, as another chest head integrated air bag device, the device is provided on a side portion of a seat back, and an airbag bag body whose developed shape is substantially L-shaped in a side view is provided from a rear side portion of an occupant. A device for deployment can be considered.

[0005]

However, in the chest head-integrated airbag device for deploying the substantially L-shaped airbag bag from the rear side of the occupant, when the airbag bag is deployed, When the arm part is placed on the door belt line of the vehicle, the arm part of the occupant is located on the front side in the deploying direction of the airbag bag, so that the arm part interferes with the deployment of the airbag bag body.

In consideration of the above facts, the present invention deploys the arms by the airbag bag body when the occupant places the arms on the door belt line when deploying the airbag bag body. It is an object of the present invention to obtain a chest head-integrated airbag device that can be removed from the trajectory.

[0007]

According to a first aspect of the present invention, there is provided a thorax head-integrated airbag device for protecting an occupant against a side collision, which is deployed from the rear side of the occupant toward the front of the vehicle. A first bag for deploying to the lateral region of the chest including the shoulders of the occupant.
Deployment area and then a second deployment to the lateral area of the head
It is characterized by consisting of a development area of.

Therefore, at the initial stage of airbag bag deployment, the first
Develops toward the front of the vehicle, pushes back the occupant's arm to the front of the vehicle, and then the second expands.

According to a second aspect of the present invention, in the chest head-integrated airbag device according to the first aspect, the airbag bag body has the first expanding region and the second expanding region separated by partitioning means. The partition means is characterized in that the partition means breaks after the completion of the expansion of the first expansion area.

Therefore, in the airbag body, the first expanding area is first expanded, and when the first expanding area is completed, the partitioning means is broken and the second expanding area is expanded.

According to a third aspect of the present invention, in the chest head-integrated air bag apparatus according to the second aspect, the partitioning means is provided upward from a lower portion of a seat belt located above a shoulder of an occupant toward a front side of the vehicle. It is characterized in that it is provided with an inclination.

Therefore, after the partitioning means is broken, the second deployment area is in a direction substantially perpendicular to the partitioning means, that is, a line inclined upward from the lower part of the seat belt located above the shoulder of the occupant toward the front of the vehicle. On the other hand, it deploys in a substantially vertical direction.
This direction is substantially along the seat belt.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a chest head-integrated airbag device of the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a vehicle forward direction, an arrow UP indicates a vehicle upward direction, and an arrow IN indicates a vehicle width inside direction.

As shown in FIG. 1, the chest head-integrated airbag device 10 of this embodiment is attached to a vehicle width direction outer side portion 20A of a seat back 20.

As shown in FIG. 5, the air bag body 22.
Has a head protection portion 22A at an upper portion in the vertical direction, and the head protection portion 22A is adapted to be deployed between the head portion 24A of the occupant 24 and the door glass 26. The lower part of the airbag bag 22 in the vertical direction is a chest protection portion 22B, and the chest protection portion 22B is deployed between the chest portion 24B of the occupant 24 and the side door 28. .

As shown by an imaginary line in FIG. 1, the airbag bag body 22 is provided with a breaking thread 32 as a partitioning means. The breaking thread 32 is provided so as to be inclined upward from the vicinity of the lower portion 30A of the seat belt 30 located above the shoulder 24C of the occupant 24 toward the front of the vehicle, and the airbag bag 22 is expanded by the breaking thread 32. Occupation 2 first
It is partitioned into a first deployment area 34 that deploys in the lateral area of the chest 24B including the shoulders 24C of four, and a second deployment area 36 that deploys in the lateral area of the head 24A of the occupant 24 thereafter. .

Therefore, at the initial stage of the airbag bag deployment, the first
When the deployment area 34 of the vehicle is deployed toward the front of the vehicle and the arm portion 24D of the occupant 24 is placed on the belt line 38 of the vehicle, as shown in FIGS. Pushes back the upper arm portion 24E of the occupant 24 from the rear to the front, and moves the arm portion 24D of the occupant 24 from the position shown in FIG. 3 to the position shown in FIG.

Further, the broken yarn 32 has a first spreading area 34.
When the expansion of is completed, it will be broken by the gas pressure. When the broken yarn 32 breaks, the second expansion region 36 is expanded in a direction substantially perpendicular to the broken yarn 32 (direction of arrow B in FIG. 1), that is, in a substantially upward direction along the seat belt 30. It has become.

Next, the operation of the present embodiment will be described. In the chest head-integrated airbag device 10 of the present embodiment, as shown in FIG.
As shown in FIG. 2, the airbag bag 22 first starts to deploy from the rear end portion 22C in the deploying direction, and the first deploying region 34 is directed substantially forward of the vehicle (direction of arrow A in FIG. 2) at the initial stage of deploying. To deploy. At this time, even when the arm portion 24D of the occupant 24 is placed on the belt line 38 of the vehicle, the first developed region 34 and the second developed region 36 are partitioned by the breakage yarn 32. The first expansion region 34 surely expands toward the front of the vehicle as shown by the imaginary line in FIG. 2, and pushes back the occupant's upper arm portion 24E from the rear to the front,
The arm 24D of No. 4 is moved from the position shown in FIG. 3 to the position shown in FIG.

Next, when the expansion of the first expansion region 34 is completed, the broken yarn 32 is broken by the gas pressure. Broken thread 32
When ruptures, the second expansion region 36 expands in a direction substantially perpendicular to the ruptured yarn 32 (direction of arrow B in FIG. 1), that is, in a direction substantially upward along the seat belt 30.

Therefore, in the chest head-integrated airbag apparatus 10 of this embodiment, even when the arm portion 24D of the occupant 24 is placed on the belt line 38 of the vehicle, the airbag bag 22 is initially deployed. First, the first deployment area 34 is reliably deployed toward the front of the vehicle, and the upper arm 24E is pushed back from the front to retract the arm 24D from the deployment track of the airbag bag 22. You can
Therefore, the second expansion area 36 can be smoothly expanded following the first expansion area 34.

Further, in the chest head-integrated airbag device 10 of the present embodiment, after the breaking yarn 32 is broken, the second deployment region 36 is in a direction substantially perpendicular to the breaking yarn 32, that is, the shoulder of the occupant 24. The seat belt 30 is unfolded in the direction of arrow B in FIG. Since this direction is substantially along the seat belt 30, the second deployment region 36 of the airbag 22 and the seat belt 2 are
The interference with 2 is suppressed, and the second expansion region 36 can be smoothly expanded.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are included in the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, in the present embodiment, the broken yarn 32 is used as the partitioning means, but instead of this, other partitioning means such as partition cloth may be used. Further, in the present embodiment, the chest head-integrated airbag device 10 is attached to the vehicle width direction outer side portion 20A of the seat back 20, but instead of this, the chest head-integrated airbag device 10 is mounted on the B pillar. It may be configured to be provided in the lower part of.

[0025]

According to the first aspect of the present invention, in a thorax head integrated air bag device for protecting an occupant against a side collision, an air bag that is deployed from the side rear of the occupant toward the front of the vehicle. The airbag body comprises a body and a first deployment region that deploys first to a lateral region of the chest including the shoulders of the occupant, and then a second deployment region that deploys to a lateral region of the head. Therefore, when the occupant puts his / her arm on the door belt line when the airbag is deployed, the airbag causes the arm to move away from the deployment path of the airbag, and the second It has an excellent effect that the expansion area can be smoothly expanded.

According to a second aspect of the present invention, in the chest head-integrated airbag device according to the first aspect, the airbag bag body is partitioned by a partition means into a first deployment area and a second deployment area. Since the partition means is configured to rupture the first deployment area after the deployment is completed, it has an excellent effect that the airbag bag can be reliably deployed in the order of the first deployment area and the second deployment area.

According to a third aspect of the present invention, in the airbag apparatus integrated with the thorax head according to the second aspect, the partitioning means extends upward from the lower portion of the seat belt located above the shoulder of the occupant toward the front of the vehicle. Since it is provided so as to be inclined, there is an excellent effect that interference between the second deployment area and the seat belt can be suppressed, and the second deployment area can be deployed smoothly.

[Brief description of the drawings]

FIG. 1 is a side view showing an airbag bag deployed state of a chest head integrated airbag device according to an embodiment of the present invention.

FIG. 2 is a side view showing an initial stage of airbag bag deployment of the chest head-integrated airbag device according to the embodiment of the present invention.

FIG. 3 is a schematic plan view showing an initial stage of airbag bag deployment of the chest head-integrated airbag device according to the embodiment of the present invention.

FIG. 4 is a schematic plan view showing an airbag bag deployed state of the chest head-integrated airbag device according to the embodiment of the present invention.

FIG. 5 is a schematic front view showing an airbag bag deployed state of the chest head integrated airbag device according to the embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view showing the airbag bag deployed state of the chest head-integrated airbag device according to the conventional embodiment, as seen from the front of the vehicle.

[Explanation of symbols]

 10 Chest head integrated airbag device 20 Seat back 22 Air bag body 22A Head protection part 22B Chest protection part 24 Occupant 24A Head 24B Chest 24C Shoulder 24D Arm part 30 Seat belt 32 Breaking thread (partitioning means) 34th 1 deployment area 36 2nd deployment area 38 Belt line

Claims (3)

[Claims] 1. A chest head-integrated airbag device for protecting an occupant against a side collision, comprising an airbag bag body that is deployed from a rear side portion of the occupant toward a front side of the vehicle, the airbag bag body. Is a first deployment region that deploys to the lateral region of the chest including the shoulders of the occupant, and then a second deployment region that deploys to the lateral region of the head. Air bag system. 2. The airbag bag body is configured such that the first deployment area and the second deployment area are partitioned by partition means, and the partition means breaks after the completion of deployment of the first deployment area. The chest head integrated air bag device according to claim 1. 3. The chest head integrated body according to claim 2, wherein the partition means is provided so as to be inclined upward from a lower portion of a seat belt located above a shoulder of an occupant toward a front side of a vehicle. Air bag system.