JP2021024312A - Air bag and air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag and an airbag device for a far side having excellent restraint performance of a head and an upper body of an occupant. When a vehicle undergoes a side collision, the gas supplied from the inflator 2 to the first expansion section 10 expands the annular chamber 12 and supplies the gas to the second expansion section 20 via the first bottleneck 14. The first chamber 21 and the second chamber 22 are expanded. The first chamber 21 bends toward the occupant P near the first bottleneck 14 and intervenes between the upper portion of the inflated first expansion portion 10 and the head H of the occupant P. The second chamber 22 expands downward from the front end of the first chamber 21. The second chamber 22 is located on the front side of the right shoulder of the occupant P and restrains the vicinity of the right shoulder. Since the second chamber 22 expands and expands from the front of the head of the occupant P to the front side near the right shoulder, the movement of the occupant's head H to the right front in the case of a side collision from the diagonally right front is restricted. [Selection diagram] Fig. 1

Description

The present invention relates to a far-side airbag and an airbag device mounted on a side portion of a vehicle seat on the center side in the vehicle width direction.

In a side collision of a vehicle such as an automobile, the vehicle is moved by the impact force of the collision, whereas the occupant seated in the seat tries to stay in the place, and therefore receives an inertial force toward the collision side. , The occupant of the non-collision side seat receives a force that moves toward the center side in the vehicle width direction. Therefore, an airbag device for the far side that expands and deploys between adjacent seats has been proposed. Patent Document 1 describes that an airbag for the far side is composed of a chest chamber and a head chamber above the chest chamber in order to restrain the chest and head of an occupant.

Patent Document 2 describes a side airbag device having an airbag that expands and expands above the head of an occupant. The upper part of the airbag has an airbag protrusion that expands so as to wrap around the front of the occupant's head. This airbag protrusion restrains the occupant's head in the event of a collision with the vehicle from diagonally forward.

U.S. Patent Application Publication No. 2019/016502 Japanese Unexamined Patent Publication No. 2006-8105

In the airbag of Patent Document 2, when the vehicle collides sideways, the shoulders, arms, chest and body of the far-side occupant push the far-side airbag, so that the airbag moves away from the occupant's head. Therefore, the restraint of the occupant's head is insufficient.

In the far-side airbag of Patent Document 1, only the rear part of the head chamber is connected to the rear part of the upper part of the chest chamber. Therefore, even if the chest chamber is pushed by the occupant's body and moves to the collision side, the head chamber is in the original position. The head chamber restrains the occupant's head.

An object of the present invention is to provide an airbag and an airbag device for the far side, which are excellent in restraining performance of the head and upper body of an occupant.

The airbag of the present invention is an airbag of a far-side airbag device mounted on a side portion of a seat back on the center side in the vehicle width direction, and has a first inflatable portion that expands laterally to an occupant and a rear portion. Inflates between the upper part of the first inflated part and the occupant's head, and communicates with the second inflated part in which the front part inflates in front of the occupant's shoulder and in the first inflated part and in the second inflated part. The rear portion of the second inflatable portion has a communication portion, and is bent from the first inflatable portion to the occupant side in a state where the airbag is inflated, and the upper portion of the front portion of the second inflatable portion is in the rear portion. On the other hand, it is continuous in a bent shape.

In one aspect of the present invention, the first expanding portion has an annular chamber orbiting the first expanding portion and a non-expanding portion surrounded by the annular chamber.

In one aspect of the present invention, the communication portion is a first bottleneck located at the rear portion of the upper part of the first expansion portion, and when the airbag is expanded, the rear portion of the first expansion portion is the first bottleneck. Bend toward the occupant side.

In one aspect of the present invention, the rear portion of the second expansion portion communicates with the first expansion portion via the first bottleneck, extends forward, and in an expanded state, at least a part of the occupant head and the first portion. 1 It is a first chamber located between the upper part of the expansion part.

In one aspect of the present invention, the front portion of the second expansion portion has an upper portion communicating with the front portion of the first chamber, and in an expanded state, expands downward from the front portion of the first chamber. It has a second chamber located in front of the occupant's shoulder, and the lower portion of the second chamber is joined to the front portion of the first expansion portion.

In one aspect of the present invention, a second bottleneck is provided between the first chamber and the second chamber, and when the airbag expands, the second expansion portion bends at the second bottleneck.

In one aspect of the present invention, the lower portion of the second expansion portion communicates with the inside of the first expansion portion via a communication portion of the front portion of the first expansion portion in the vertical direction and expands upward. It has a second chamber and a first chamber whose front portion communicates with the upper part of the second chamber via a second bottleneck.

In one aspect of the invention, the rear portion of the first chamber is joined to the rear portion of the upper part of the first expansion portion.

In one aspect of the present invention, the lower portion communicates with the occupant side of the front portion of the first expansion portion via a communication port, and has a second chamber that expands upward from the communication port.

In one aspect of the present invention, the upper part of the second chamber and the front part of the first chamber are joined.

In one aspect of the present invention, there is a first tether for locating the rear portion of the second inflated portion on the occupant side of the upper portion of the first inflated portion when the airbag is inflated.

In one aspect of the present invention, the upper end of the first tether is connected to the rear portion of the second expansion portion, and the lower end of the first tether is connected to the first expansion portion or the seat back frame.

In one aspect of the present invention, the lower end of the first tether is connected to the non-expanding portion.

In one aspect of the present invention, the front end of the first tether is connected to the front portion of the second expansion portion, and the rear end is connected to the seat back frame or the rear portion of the first expansion portion.

The airbag device of the present invention includes such an airbag of the present invention and an inflator for inflating the airbag.

In the airbag of the present invention, the tilt of the occupant head is restrained by the intervention of the second inflated portion between the upper portion of the first inflated portion and the occupant head at the time of a side collision.

In one aspect of the present invention, the first chamber of the second expansion portion is interposed between the upper portion of the first expansion portion and the occupant's head at the time of a side collision.

In one aspect of the present invention, the second inflated portion restrains the occupant's head and further near the shoulder during a side collision from diagonally forward.

It is a block diagram at the time of non-expansion of the airbag which concerns on embodiment. It is a side view of the expansion completion state of the airbag which concerns on embodiment. It is a front view of the expansion completion state of the airbag which concerns on embodiment. It is a rear view of the expansion completion state of the airbag which concerns on embodiment. It is a perspective view of the expansion completion state of the airbag which concerns on embodiment. FIG. 5 is a sectional view taken along line VI-VI of FIG. FIG. 5 is a sectional view taken along line VII-VII of FIG. It is a side view of the expansion completion state of the airbag which concerns on another embodiment. It is a side view of the expansion completion state of the airbag which concerns on another embodiment. It is a rear view of the expansion completion state of the airbag which concerns on another embodiment. It is a side view of the expansion completion state of the airbag which concerns on another embodiment. 12a is an enlarged view of a part of the airbag according to another embodiment, and FIG. 12b is a sectional view taken along line XIIb-XIIb of FIG. 12a. It is a perspective view of the expansion completion state of the airbag which concerns on another embodiment. It is a perspective view of the expansion completion state of the airbag which concerns on another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the front-rear, up-down, and left-right directions coincide with the front-rear, up-down, and left-right directions of the vehicle unless otherwise specified. FR, UP, and CENTER indicate the center side of the vehicle in the front direction, the upward direction, and the vehicle width direction, respectively.

[First Embodiment]
1 to 7 show the airbag 1 according to the first embodiment of the present invention, and FIG. 1 shows a state in which the airbag 1 before expansion is flatly spread out. FIGS. 2 to 7 show a state in which the airbag is expanded and expanded.

The airbag device according to the present embodiment is a so-called far-side airbag device, and is mounted on a side portion of a vehicle seat on the center side in the vehicle width direction. In the present embodiment, the seat is the left seat of the vehicle, and the airbag device is mounted on the right side of the seat.

The seat includes a seat cushion, a seat back and a headrest. The seat back has a seat back frame that serves as its skeleton.

In this embodiment, the airbag device is attached to the seat back frame.

The airbag device includes an airbag 1 that is folded and stored in a seat back, and an inflator 2 that supplies an expansion gas to the airbag 1.

In the airbag 1, the peripheral edges of the two panels (first panel 31 and second panel 32 shown in FIGS. 6 and 7) are sewn by seams 33, and the central portion of the first expansion portion 10 is sewn by seams 34. It is sutured. The airbag 1 has a size capable of restraining the occupant's head, shoulders, chest and abdomen.

As shown in FIG. 1, the airbag 1 is arranged in a lower first expansion portion 10 and an upper side of the first expansion portion 10 into which the gas from the inflator 2 first flows in and expands. It has a second expansion portion 20 that expands due to the gas flowing in from the expansion portion 10.

The first expansion portion 10 has an insertion port 11 of the inflator 2, an inflatable annular chamber 12 communicating with the insertion port 11, and a non-expansion portion 13 surrounded by the annular chamber 12. There is.

As shown in FIG. 1, the airbag 1 is connected to a rear side 1a extending substantially in the vertical direction and a rear side 1a, and is connected to an upper side 1b extending substantially in the front-rear direction and the upper side 1b. , The upper front side 1c extending substantially in the vertical direction and the upper front side 1c extending substantially in the front-rear direction and extending in the upper front side 1d and the upper cut side 1d extending substantially in the front-rear direction. An existing lower cut side 1e, a lower front side 1f connected to the lower cut side 1e and extending substantially in the vertical direction, and a lower side 1g connected to the lower front side 1f and extending rearward. It has an extending side 1h that extends to the lower part of the rear side 1a and extends rearward.

The seams 33 are provided along these sides 1a to 1h. The sides 1g and 1h are substantially parallel, and the space between the rear ends thereof is the insertion port 11 of the inflator 2. Instead of the inflator 2, one end of a gas duct pipe connected to the inflator may be inserted into the insertion port 11.

A cut portion 4 is formed between the upper cut side 1d and the lower cut side 1e. The cut portion 4 extends from the upper portion of the front side of the airbag 1 toward the rear.

The lower side of the cut portion 4 is the first expansion portion 10, and the upper side of the cut portion 4 is the second expansion portion 20.

The first expansion portion 10 is provided with an annular seam 34 at the center thereof, and an annular chamber 12 is formed between the seam 34 and the seam 33. The inside of the seam 34 is a non-expanding portion 13.

Of the seams 33, the upper cut side 1d and the portions 33d and 33e along the lower cut side 1e extend from the front sides 1c and 1f of the airbag 1 to the vicinity of the rear side 1a. Eyelet-shaped seams 35 are provided at the rear ends of the seams 33d and 33e. The area between the vicinity of the eyelet-shaped seam 35 and the seam 33 along the rear side 1a is a first bottleneck 14 that connects the first expansion portion 10 and the second expansion portion 20.

The second expansion portion 20 has a chamber that is surrounded by the seams 33 and extends substantially in the anteroposterior direction. Of the seams 33, the seam 33d along the cut side 1d is an approaching portion 33d'approaching the upper side 1b in the vicinity of the eyelet-shaped seam 35, and is along the approaching portion 33d' and the upper side 1b. The space between the seam 33 and the seam 33 is the second airo 23.

The chamber of the second expansion portion 20 is composed of a first chamber 21 on the first bottleneck 14 side of the second bottleneck 23 and a second chamber 22 on the front side of the second bottleneck 23.

The tip (front end in FIG. 1) of the second expansion portion 20 is joined to the front portion of the first expansion portion 10 by suturing.

As shown in FIG. 2, tethers 5, 6 and 7 are provided in this embodiment. The first tether 5 is for locating the expanded first chamber 21 on the occupant P (FIG. 3) side. The upper end of the tether 5 is sewn to the first chamber 21 portion of the upper side 1b. The lower end of the tether 5 is sewn on the upper part of the non-expanding portion 13.

The second tether 6 is for suppressing the front side of the expanded first expansion portion 10 from retreating from the occupant to the right. The front edge of the tether 6 is sewn near the front portion of the cut side 1e. The rear end of the tether 6 is connected to the seat back frame.

The upper end of the third tether 7 is sewn near the middle of the rear side 1a in the vertical direction, and the lower end is sewn to the lower part of the front side 1f.

When a vehicle equipped with an airbag device having an airbag 1 configured in this way collides sideways from the right side, the inflator 2 operates to generate gas. The gas supplied from the inflator 2 to the first expansion section 10 expands the annular chamber 12 and is supplied to the second expansion section 20 via the first bottleneck 14 to expand the first chamber 21 and the second chamber 22. Let me.

As shown in FIGS. 2 to 6, the expanded first chamber 21 is bent toward the occupant P near the first bottleneck 14 by being pulled by the tether 5, and the upper portion of the expanded first expansion portion 10 and the head of the occupant P are bent. It intervenes with H.

Further, the second expansion portion 20 bends near the second airo 23, and the second chamber 22 expands downward from the front end of the first chamber 21. The second chamber 22 is located on the front side of the right shoulder of the occupant P and restrains the vicinity of the right shoulder.

In this way, since the first chamber 21 is located between the upper portion of the first expansion portion 10 and the occupant head H, the tilt of the occupant head H is restrained.

Further, since the second chamber 22 expands and expands from the front of the head of the occupant P to the front side near the right shoulder, the movement of the occupant's head H to the right front in the case of a side collision from the diagonally right front is restricted.

[Another Embodiment]
In the first embodiment, the tether 5 for bending the first chamber 21 toward the occupant P side is erected between the upper side 1b and the non-expanding portion 13, but the airbag 1A in FIG. 8 As described above, the lower end of the tether 5 may be sewn to the rear side 1a of the first expansion portion 10.

Further, the rear end of the tether 5 may be connected to the seat back frame as in the airbag 1B of FIG.

Further, as in the airbag 1C of FIG. 10, instead of the tether 5, a tether cloth 41 straddling the rear surface of the expanded first chamber 21 and the upper rear surface of the expanded annular chamber 12 may be provided.

As in the airbag 1D of FIG. 11, the front end of the tether 5 may be connected to the second chamber 22, and the rear end may be connected to the seat back frame or the rear portion of the first expansion portion 10.

Other configurations of the airbags 1A to 1D of FIGS. 8 to 11 are the same as those of the airbag 1, and the same reference numerals indicate the same parts.

In the present invention, as in the airbag 1'in FIGS. 12a and 12b, the panels 31 and 32 are provided with slits 42 extending substantially in the front-rear direction in the vicinity of the eyelet-shaped seams 35, and the slits 42 of the panels 31 and 32 are provided. The upper portion and the lower portion of the above may be overlapped and extended to the occupant P side, and the overlapped portion may be sewn by the stitch 43.

In the airbags 1, 1', 1A to 1D, the first bottleneck 14 that communicates the first expansion portion 10 and the second expansion portion 20 is located above the first expansion portion 10, but the airbag in FIG. 13 As in 1E, the first bottleneck 15 may be located in front of the first expansion portion 10, and the second bottleneck 22 and the annular chamber 12 may communicate with each other by the first bottleneck 15. The first bottleneck 15 is located in the middle of the first expansion portion 10 in the vertical direction.

In FIG. 13, the first bottleneck 14 that communicates the first chamber 21 and the annular chamber 12 is not provided. The rear portion of the first chamber 21 is connected to the rear portion of the upper portion of the first expansion portion 10 by suturing or the like.

In the airbag 1F of FIG. 14, the rear portion of the first chamber 21 and the upper portion of the annular chamber 12 are communicated by the first bottleneck 14, and the lower portion of the second chamber 22 and the front portion of the annular chamber 12 are connected by the first bottleneck 15. Communicating. The second airo 23 that communicates the first chamber 21 and the second chamber 22 is not provided, and the first chamber 21 and the second chamber 22 are not directly communicated with each other. The front part of the first chamber 21 and the upper part of the second chamber 22 are connected by suture or the like.

Other configurations of the airbags 1E and 1F in FIGS. 13 and 14 are the same as those of the airbag 1, and the same reference numerals indicate the same parts.

Each of the above embodiments shows one embodiment of the present invention, and the present invention is not limited to each of the above embodiments.

1,1', 1A ~ 1F Airbag 2 Inflator 4 Notch 5,6,7 Tether 10 1st expansion 12 Circular chamber 13 Non-expansion 14,15 1st bottleneck 20 2nd expansion 21 1st chamber 22 2nd chamber 23 2nd bottleneck 31,32 Panel 33,34,35,43 Seams

Claims (15)

It is an airbag of the far side airbag device mounted on the side of the seat back on the center side in the vehicle width direction.
The first expansion part that expands to the side of the occupant,
A second inflated portion in which the rear portion expands between the upper part of the first inflated portion and the occupant's head and the front portion inflates in front of the occupant's shoulder.
It has a communicating portion that communicates between the inside of the first expanding portion and the inside of the second expanding portion.
The rear portion of the second inflated portion bends from the first inflated portion toward the occupant side in a state where the airbag is inflated, and the upper portion of the front portion of the second inflated portion bends with respect to the rear portion of the airbag. .. The airbag according to claim 1, wherein the first expanding portion has an annular chamber that goes around the first expanding portion and a non-expanding portion that is surrounded by the annular chamber. The communication portion is a first bottleneck located at the rear portion of the upper part of the first expansion portion.
The airbag according to claim 1 or 2, wherein when the airbag is inflated, the rear portion of the first inflated portion bends toward the occupant in the first bottleneck. The rear portion of the second expansion portion communicates with the first expansion portion via the first bottleneck and extends forward, and in the expanded state, at least a part of the occupant's head and the upper portion of the first expansion portion are connected. The airbag according to claim 3, wherein the airbag is located between the first chambers. The front portion of the second expansion portion has an upper portion communicating with the front portion of the first chamber, and in the expanded state, expands downward from the front portion of the first chamber and is in front of the shoulder of the occupant. It has a second chamber located and
The airbag according to claim 4, wherein the lower portion of the second chamber is joined to the front portion of the first expansion portion. A second bottleneck is provided between the first chamber and the second chamber.
The airbag according to claim 5, wherein when the airbag is inflated, the second inflatable portion bends at the second bottleneck. The second expansion portion is
A second chamber in which the lower portion communicates with the first expansion portion via a communication portion in the middle portion in the vertical direction of the front portion of the first expansion portion and expands upward.
The airbag according to claim 1 or 2, which has a first chamber whose front portion communicates with the upper part of the second chamber via a second bottleneck. The airbag according to claim 7, wherein the rear portion of the first chamber is joined to the rear portion of the upper portion of the first expansion portion. The airbag according to claim 4, wherein the lower portion communicates with the occupant side of the front portion of the first expansion portion via a communication port, and has a second chamber that expands upward from the communication port. The airbag according to claim 9, wherein the upper part of the second chamber and the front part of the first chamber are joined. The airbag according to any one of claims 1 to 10, further comprising a first tether for locating the rear portion of the second inflatable portion on the occupant side of the upper portion of the first inflatable portion when the airbag is inflated. .. The airbag according to claim 11, wherein the upper end of the first tether is connected to the rear portion of the second expansion portion, and the lower end of the first tether is connected to the first expansion portion or the seat back frame. The airbag according to claim 2, wherein the lower end of the first tether is connected to the non-expanding portion. The airbag according to claim 11, wherein the front end of the first tether is connected to the front portion of the second expansion portion, and the rear end is connected to the seat back frame or the rear portion of the first expansion portion. An airbag device comprising the airbag according to any one of claims 1 to 14 and an inflator that inflates the airbag.

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