WO2007136027A1 - Curtain airbag system - Google Patents

Abstract

A curtain airbag system in which control of developing direction is facilitated such that interference/aggressiveness of the curtain airbag around the garnish (GN) is eliminated, and other portions of the curtain airbag are developed appropriately along the window pane of a side door. An airbag (10) stored in the roof side rail section has a gas supply passage (20) extending upward in the longitudinal direction, and a plurality of cells (C1, C2) into which expansion gas is introduced downward from the gas supply passage (20). The airbag (10) is once folded back to the outer side of a car and then roll-folded to the inner side of the car, and, under that state, the upper edge portion thereof is secured to the roof side rail section. Furthermore, the slot sections (S1, S2) for introducing the expansion gas from the gas supply passage (20) to each cell (C1, C2) have a substantially inverted triangular shape widened upward and constricted downward.

Description

 Specification

 Curtain airbag device

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a curtain airbag device that expands along a window of a side door at the time of a side collision (side collision) or rollover (rollover) of an automobile. Background art

 [0002] Curtain air that protects the occupant's head by introducing an inflation gas into the airbag stored in the roof side rail portion when the side collision or rollover is detected, and inflating the gas. The bag device is described in, for example, US Pat. No. 6,758,490 (US 6,758,490 B2). This has a rolled portion located on the outside of the vehicle and a fold portion located on the inside of the vehicle (see Fig. 4a of Patent Document 1).

 Patent Document 1: US Patent No. 6758490 (US 6,758,490 B2)

 Disclosure of the invention

 Problems to be solved by the invention

[0003] In such a conventional curtain airbag device, as shown in FIG. 3, the mounting portion of the upper edge portion is fixed to the roof side rail portion a. Further, it is stored in the roof side rail portion _a in a state of being folded once on the outside of the vehicle and rolled on the inside of the vehicle. The part that wraps once is called "+1". The curtain airbag as shown in Fig. 3 with the roll r on the outside of the car and the folded part f of "+1" on the inside of the car is called the "inner roll + 1" folded force. It is

[0004] In the conventional curtain airbag folded by “inner roll + 1”, the deployment direction of the airbag is controlled by managing the dimension of the folded portion of “+1”. However, just managing the size of the fold-back part of `` +1 '' will affect the deployment direction of the curtain airbag !, and when the airbag is deployed, the roof side rails and head liners (GN Interference with other types [0005] The present invention solves the above-mentioned problems, eliminates interference and aggression around the gursh (GN) of the curtain airbag, and the portion of the curtain airbag other than around the GN is a side door. An object of the present invention is to provide a curtain airbag device in which the deployment direction can be easily controlled such that it is appropriately deployed along the window glass.

 Means for solving the problem

[0006] For this purpose, the curtain airbag device of the present invention deploys the inflation gas to the airbag stored in the roof side rail portion and the inflation gas is introduced into the vehicle interior when a side collision or rollover is detected. A curtain airbag device for protecting the head of an occupant,

 The airbag has a gas supply path extending in an upper longitudinal direction thereof and a plurality of cells into which inflation gas is introduced downward from the gas supply path, and is folded back to the vehicle outer side and rolled to the vehicle inner side. In the folded state, the upper edge portion is fixed to the roof side rail portion, and the gas supply path force The shape of the slot portion for introducing the expansion gas into each cell is broadened on the upper side and the lower side is narrowed down It is characterized by a substantially inverted triangular shape. It is preferable that the slot portion is disposed in an area corresponding to the seated passenger's head and not disposed in an area corresponding to the pillar garsh.

 The invention's effect

 [0007] The curtain airbag device of the present invention can control the deployment direction of the airbag by a combination of dimension management of the folded portion of "+1" and a cell pattern. The present invention makes it possible to achieve both coherence / aggressiveness with garches (GN) such as roof side rails and head liners and an ideal deployment direction.

 Brief Description of Drawings

 FIG. 1 (A) is a front view of a curtain airbag device according to an embodiment of the present invention. (B) is a cross-sectional view of the slot portion of the curtain airbag device of FIG. 1 (A) in a state where “inner roll + 1” is folded.

 2 is a cross-sectional view for explaining an expanded state in the initial stage of expansion of the slot portion of FIG.

 FIG. 3 is a cross-sectional view illustrating the “inner roll + 1” folding of the curtain airbag.

[Figure 4] Position of occupant head and pillar garsh when deploying curtain air bag device of Figure 1 FIG.

 Explanation of symbols

 [0009] 10 Airbag

 11 ~ 19 linear joint

 l la to 19a, 16b, 19b

 20 Gas supply path

 21 One entrance

 22 The other entrance

 C, C cell

 1 2

 S, S slot

 1 2

 S f, S f Folding part

 1 2

 S -r, S -r Roll part

 1 2

 N, N Non-expandable part

 1 2

 GN Garnish

 H Crew head

 BEST MODE FOR CARRYING OUT THE INVENTION

[0010] The airbag 10 of the curtain airbag device M is folded by “inner roll + 1” folding. The folded airbag 10 is stored along the roof side rail portion, for example, from the front pillar to the rear pillar of the automobile. The airbag 10 is inflated and deployed in the form of a curtain along the side of the passenger compartment, into which the inflation gas is introduced when a side impact or rollover of the automobile is detected. The airbag 10 receives the heads of the front and rear passengers in the vehicle to protect the heads, or prevents the passengers from being thrown out of the vehicle by breaking the window glass.

 [0011] When the airbag 10 is inflated and deployed, the inner side sheet and the outer side sheet facing the vehicle compartment side surface and the vehicle compartment are overlapped, and these sheets are joined by a linear coupling portion and an annular coupling portion. . As a result, a gas supply path 20 extending in the upper longitudinal direction of the airbag 10 and a plurality of cells C, C into which inflation gas is introduced downward from the gas supply path 20

 1 2

, And non-expanded portions N 1, N are formed. One inlet 21 of the gas supply path 20 is formed at an end on the rear pillar side above the airbag 10. The other inlet 22 of the gas supply path 20 is formed at the end on the front pillar side above the airbag 10. The one inlet 21 and the other inlet 22 are connected to an inflator (not shown) as a gas supply source.

 [0013] The linear coupling portion 11 is disposed so as to substantially circulate the airbag 10. The linear coupling portion 12 disposed on the other inlet 22 side forms a slot portion S together with the portion on the inlet 22 side of the linear coupling portion 11. The slot portion S is a portion for introducing the expansion gas from the gas supply path 20 to the cell C. The shape of the slot portion S is constituted by the linear coupling portion 11 and the linear coupling portion 12, and the shape is a substantially inverted triangular shape with the upper part being wide and the lower part being constricted.

 [0014] The so-called "inner roll + 1" folded airbag 10 has its slot portion S squeezed in a substantially inverted triangular shape (forms a squeeze) at the initial stage of inflation and deployment. This configuration limits the introduction of inflation gas into the lower cell. As a result, the folded portion S-f of the slot portion S mainly expands and strongly presses the roll portion S-r to the outside of the vehicle (see FIG. 2). After that, the roll S-r develops along the window glass of the side door.

 The linear coupling portion 12 extends upward from below the linear coupling portion 11 and has a substantially η shape. A cell C is formed inside the linear coupling portion 12. The end of the linear coupling portion 12 continues to the annular coupling portion 12a. The annular coupling portion 12a reinforces the end of the linear coupling portion 12.

 A substantially J-shaped linear coupling portion 13 is disposed adjacent to the linear coupling portion 12. The substantially rectangular linear connecting portion 14 is continuous with the linear coupling portion 13. A non-expandable portion N is formed inside the linear coupling portion 14. The end of the linear coupling portion 13 is continuous with the annular coupling portion 13a. The annular coupling portion 13a reinforces the end portion of the linear coupling portion 13.

 An approximately 7-shaped linear coupling portion 15 is disposed adjacent to the linear coupling portion 14. The linear coupling portion 15 extends upward from below the linear coupling portion 11. The end of the linear coupling portion 15 is continuous with the annular coupling portion 15a. The annular coupling portion 15a reinforces the end of the linear coupling portion 15.

The linear coupling part 15 forms a cell C together with the linear coupling part 16. Linear combination Both ends of the portion 16 are connected to the annular coupling portions 16a and 16b. The expansion gas flows into the cell C from the gap between the annular coupling portion 15a and the annular coupling portion 16a.

 2

 The linear coupling portion 15 forms a slot portion S together with the linear coupling portion 14. This

 2

 The lot part S is a part for introducing the expansion gas from the gas supply path 20 into the cell C. this

 twenty two

 The slot portion S is constituted by the linear coupling portion 14 and the linear coupling portion 15 and has a shape thereof.

 2

 Is in the shape of a roughly inverted triangle with the top wide and the bottom narrowed!

[0020] The airbag 10 folded so-called "inner roll + 1" is introduced into the folded portion S-f of the slot portion S as shown in FIG. . Follow

 twenty two

 Roll part S — r is strongly pressed to the outside of the car and then along the side door window glass.

 2

 The roll part S — r is expanded in the same way.

 2

 A substantially J-shaped linear coupling portion 17 is disposed adjacent to the linear coupling portion 15. The substantially rectangular linear connecting portion 18 is continuous with the linear connecting portion 17. A non-inflatable portion N is formed inside the linear coupling portion 18. The end of the linear coupling portion 17 is continuous with the annular coupling portion 17a. in front

 2

 The annular coupling portion 17a reinforces the end of the linear coupling portion 17.

A linear coupling portion 19 is disposed adjacent to the linear coupling portion 18. Both ends of the linear coupling portion 19 are connected to the annular coupling portions 19a and 19b. An annular coupling portion 11 a is formed in the vicinity of the inlet 21 of the linear coupling portion 11.

[0023] Each of the linear coupling portions 11 to 19 and each of the annular coupling portions lla to 19a, 16b, and 19b airtightly couple the inner sheet and the outer sheet. These coupling portions are strong coupling means (for example, sewing with high-strength sutures or adhesive strength) so that the inner sheet and the outer sheet do not separate even when the internal pressure of the airbag 10 rises to the design upper limit pressure. (Adhesion or welding with high adhesive).

A linear coupling portion 11 is disposed so as to go around the airbag 10. An upper peripheral edge portion 50 and a lower peripheral edge portion 51 into which the inflation gas does not flow are provided so as to surround the linear coupling portion 11. A plurality of attachment portions 53 for attaching the airbag 10 to the roof side rail portion are formed on the upper edge side of the upper peripheral edge portion 50. A clamp 54 is fixed to the front pillar side of the lower peripheral edge 51 and is connected to a predetermined connecting portion (lower front pillar) in the automobile. In the curtain airbag device M having the airbag 10 configured as described above, an inflation force inflation gas is introduced from the inlet 21 of the gas supply path 20 when a side collision or rollover is detected. At the initial stage of expansion and expansion, the folded portion S -f (S f of the slot portion S (S)

 1 2 1 2

) Is introduced into the expansion gas. Therefore, the roll part Sr is strongly pressed against the outside of the vehicle. After that, the expansion gas is introduced into cell C, cell C, etc.

 1 2

 The roll S-r (S-r) is unfolded and the airbag 10 is lowered in a curtain shape.

 1 2

To spread. Therefore, even if the gap between the occupant's head H and the pillar or window glass is narrow, the force ten airbag can be smoothly deployed between them. On the other hand, in the area corresponding to the pillar garnish _GN , the curtain airbag is deployed more toward the passenger compartment than in the area corresponding to the head H of the passenger. Therefore, it is possible to suppress the scattering of the pillar garsh if it is caught on the upper end of the pillar garsh of the curtain airbag (see FIG. 4). As a result, it is possible to effectively protect the head H of the occupant during a side collision or a temporary rollover, and to suppress the scattering of the pillar garsh if the curtain airbag is caught on the pillar garsh GN. it can.

[0026] The power described in the embodiments of the present invention has been described above. The present invention is not limited to these, and can be modified based on the technical idea shown in the claims.

Claims

The scope of the claims  [1] Curtain air that protects the occupant's head by introducing the inflation gas into the airbag stored in the roof side rail section when the side collision or rollover is detected. A bag device,  The airbag has a gas supply path extending in an upper longitudinal direction thereof and a plurality of cells into which inflation gas is introduced downward from the gas supply path, and is folded back to the vehicle outer side and rolled to the vehicle inner side. In the folded state, the upper edge portion is fixed to the roof side rail portion, and the gas supply path force The shape of the slot portion for introducing the expansion gas into each cell is broadened on the upper side and the lower side is narrowed down A curtain airbag device characterized by a substantially inverted triangular shape.  2. The curtain airbag device according to claim 1, wherein the slot portion is disposed in a region corresponding to a seated passenger's head and is not disposed in a region corresponding to the pillar garsh.