JP2001071856A - Head protection air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of a wrinkle in a non-inflation part provided with a tension belt when an air bag inflates and unfolds. SOLUTION: In this head protection air bag device, an air bag 11 inflating and unfolding in a curtain state in a side part inside a cabin has a main inflation chamber Pa nearly linearly extending; sub inflation chambers Pb, Pc extending in the longitudinal direction above and below the main inflation chamber Pa; a vertical connection inflation part Pd vertically connecting front end parts of the respective inflation chambers Pa, Pb, Pc; and a non-inflation part 11e adjacent to the vertical connection inflation part Pd. The air bag 11 is installed to a vehicle body is an upper edge part. The head protection air bag device has a tension belt 13, while the tension belt 13 includes a base end part 13a fixed to an upper part of the non-inflation part 11e, a middle part 13b inserted through a through hole 11g formed in a lower part of the non-inflation part 11e, and a tip part 13c installed in the vehicle body. The non-inflation part 11e of the air bag 11 is formed with an auxiliary inflation chamber Pf inflating to prevent generation of a winkle when the air bag 11 inflates and unfolds.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head protection airbag device mounted on a vehicle.

[0002]

2. Description of the Related Art As one of head protection airbag devices,
An airbag that inflates and deploys in the shape of a curtain at the side of the cabin to protect the occupant's head, and an airbag that is fixed to the airbag at the base end and assembled to the vehicle body at the tip end And a tension belt that generates tension on the lower edge side of the airbag when the inflation and deployment of the airbag are completed.
No. O96 / 26087.

In the airbag disclosed in this publication, a plurality of inflation chambers extending in a vertical direction are provided in front and rear in parallel, and a gas inflow portion communicating with upper end portions of these inflation chambers has an upper edge. The inflator gas is supplied from the inflator to the rear end of the gas inflow section. In the airbag having such a configuration, since the inflation gas flows downward into each inflation chamber via the gas inflow portion, it takes time to inflate each inflation chamber to some extent,
There was room for improvement in quickly securing a wide area where passengers could be restrained before the airbag inflation and deployment was completed.

As a countermeasure, as shown in FIG. 6, the applicant of the present invention has proposed a main expansion chamber Ra extending substantially linearly forward from a gas inflow portion at a rear end, and an upper and lower part of a front portion of the main expansion portion Ra. Upper and lower sub-expansion chambers Rb, Rc extending in the front-rear direction in parallel with each other, and vertically connecting the front ends of both sub-expansion chambers Rb, Rc and the front end of the main expansion chamber Ra in the vertical direction. Along with the inflatable portion Rd, a non-inflatable portion 11e is provided at a front portion adjacent to the vertically connected inflatable portion Rd.
An airbag 11 that is assembled to a vehicle body at an upper edge portion and inflates and deploys in a curtain shape at a side portion in a vehicle cabin; and is fixed to a non-inflating portion 11e of the airbag 11 at a base end 13a. A head protection airbag device having a tension belt 13 which is movably inserted through an intermediate portion 13b into a through hole 11g provided at a lower portion of the non-inflation portion 11e and is attached to a vehicle body at a tip portion 13c is disclosed in No. 11-150360.

[0005]

Problems to be Solved by the Invention Japanese Patent Application No. Hei 11-1999 mentioned above.
In the head protection airbag device of the application No. 150360, since the main inflation chamber Ra of the airbag 11 extends substantially linearly from the gas inflow portion, gas is quickly supplied to the main inflation chamber Ra at the initial stage of the deployment of the airbag 11. Can flow in. Further, the gas flowing to the front end of the main expansion chamber Ra is divided vertically by the inertial force of the gas, and the vertically connected expansion chamber R
d can be quickly guided to the vertical connection expansion chamber R.
Gas can flow from the upper and lower ends of d to the upper and lower auxiliary expansion chambers Rb and Rc.

Accordingly, at least the main inflation chamber Ra and the vertically connected inflation chamber Rd can be quickly inflated from the initial stage of the deployment of the airbag 11, and an area capable of restraining the occupant before the inflation and deployment of the airbag 11 is quickly and widely secured. can do. However, when the airbag 11 is inflated and deployed, wrinkles A are applied to the non-inflated portion 11e where the tension belt 13 is provided.
May occur, and sufficient tension may not be generated in the tension belt 13, and sufficient tension may not be generated on the lower edge side of the airbag 11 when the inflation and deployment of the airbag 11 is completed. In the airbag, the problem that wrinkles occur in the non-inflated portion where the tension belt is provided is not limited to the head protection airbag device shown in FIG. Various head protection airbag devices including an airbag that inflates and deploys in a curtain shape at the side of the vehicle interior to protect the head of the occupant, and a tension belt that generates tension at the lower edge side of the airbag. This is also a problem that can occur.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and is mounted on a vehicle body at an upper edge portion and expanded and deployed in a curtain shape at a side portion in a vehicle interior. A head protection airbag device including an airbag that protects the occupant's head and a tension belt that generates tension at a lower edge side of the airbag, wherein the airbag is located at an end side in the front-rear direction. A tension exerting expansion portion extending substantially vertically
A non-expanding portion adjacent to the tension exerting expansion portion, wherein the tension belt has a base end portion fixed to an upper portion of the non-expansion portion and an intermediate portion provided at a lower portion of the non-expansion portion. Is movably inserted, and the tip is assembled to the vehicle body,
Further, the present invention is characterized in that an auxiliary inflation chamber is provided in the non-inflation portion of the airbag, the auxiliary inflation chamber being inflated when the airbag is inflated and deployed to suppress generation of wrinkles (the invention according to claim 1).

In this case, the airbag is provided in parallel with a main inflation chamber extending substantially linearly from the gas inflow portion at one end to the other end, and above and below the other end of the main inflation chamber. Upper and lower sub-expansion chambers extending in the front-rear direction, wherein the tension exerting expansion section vertically connects the other end of the two sub-expansion chambers and the other end of the main expansion chamber in the vertical direction. It is desirable that it be constituted by an inflating portion (the invention according to claim 2).

In this case, the airbag is provided with an extended inflation chamber extending from the other end of the upper auxiliary inflation chamber to the other end of the airbag and located above the pillar. The chamber extends downward along the tension belt from an intermediate portion of the extended expansion chamber (the invention according to claim 3), or the auxiliary expansion chamber includes:
The main expansion chamber extends from the other end to the other end, and overlaps with an intermediate portion between the base end and the intermediate portion of the tension belt (the invention according to claim 4) or the auxiliary. An expansion chamber surrounds the upper portion of the non-expandable portion to which the base end of the tension belt is fixed, and the through hole provided in the lower portion of the non-expandable portion. Desirably, both ends are connected (the invention according to claim 5).

[0010]

In the head protection airbag device according to the present invention (the invention according to claim 1), when the airbag is inflated and deployed, the tension exerting inflatable portion is inflated and is adjacent to the tension exerting inflatable portion. Since the tension is generated in the tension belt provided in the non-inflating portion and the auxiliary inflation chamber provided in the non-inflating portion of the airbag is inflated, the generation of wrinkles in the non-inflating portion is suppressed. Therefore, sufficient tension can be generated in the tension belt by expansion of the tension exerting inflation portion and expansion of the auxiliary inflation chamber, and sufficient tension is generated in the lower edge portion of the airbag when the inflation and deployment of the airbag is completed. Can be done.

In practicing the present invention, the airbag is provided with a main inflation chamber extending substantially linearly from the gas inflow portion at one end to the other end, and an airbag in parallel with the upper and lower portions of the other end of the main inflation chamber. And a vertical connection that connects the other end of each of the sub-expansion chambers and the other end of the main expansion chamber in the up-down direction. When composed of an inflatable part (in the case of the invention according to claim 2)
Since the main inflation chamber of the airbag extends substantially linearly from the gas inflow portion at one end to the other end, gas can quickly flow into the main inflation chamber at the initial stage of deployment of the airbag. In addition, the gas flowing into the other end of the main expansion chamber can be diverted up and down by the inertial force of the gas, and can be quickly guided to the vertically connected expansion chamber. Gas can flow into the chamber. Therefore, at least the main inflation chamber and the vertically connected inflation chamber can be quickly inflated from the initial stage of the airbag deployment, and an area capable of restraining the occupant before the inflation and deployment of the airbag can be quickly and widely secured. A tension can be generated in the tension belt provided in the adjacent non-expandable portion by the expansion of the connection expansion chamber.

When the airbag is inflated and deployed, a non-inflated portion of the airbag (a portion where the tension belt is provided).
Since the auxiliary expansion chamber provided in the second expansion also expands, generation of wrinkles in the non-expansion portion is suppressed. Therefore, sufficient tension can be generated in the tension belt by expansion of the vertical connection expansion chamber and expansion of the auxiliary expansion chamber, and sufficient tension is generated in the lower edge portion of the airbag when the inflation and deployment of the airbag is completed. be able to.

When the present invention is carried out, an extended inflation chamber extending from the other end of the upper auxiliary inflation chamber to the other end of the airbag and located above the pillar is provided in the airbag, and the auxiliary inflation chamber is extended and inflated. In the case of a configuration extending downward along the tension belt from the middle portion of the chamber (in the case of the invention according to claim 3), the gas flowing into the upper sub-inflation chamber of the airbag flows into the extended expansion chamber and the non- It flows into the auxiliary expansion chamber provided in the expansion section, and expands the extended expansion chamber and the auxiliary expansion chamber.

Therefore, the impact when the occupant's head comes into contact with the upper part of the pillar in the expanded extended expansion chamber can be reduced. In addition, by the expansion of the auxiliary inflation chamber, wrinkles in the non-inflation portion can be suppressed, and the base end of the tension belt is fixed when the airbag is completely inflated and deployed. The length can be accurately secured up to the through hole provided in the lower part of the part. Therefore, sufficient tension can be generated in the tension belt, and sufficient tension can be generated on the lower edge side of the airbag when the inflation and deployment of the airbag is completed.

Further, when the present invention is implemented, the auxiliary expansion chamber is configured to extend from the other end of the main expansion chamber to the other end side and overlap with an intermediate portion between the base end portion and the intermediate portion of the tension belt. (In the case of the invention according to claim 4), the gas flowing into the main inflation chamber of the airbag flows from the other end of the main inflation chamber into the auxiliary inflation chamber provided in the non-inflation portion, and inflates the auxiliary inflation chamber. At the same time, the intermediate portion between the base end portion and the intermediate portion of the tension belt is pushed in the expansion direction by the expansion of the auxiliary expansion chamber. Therefore, wrinkles in the non-inflated portion of the airbag can be suppressed, and the intermediate portion of the tension belt can be curved along the auxiliary inflation chamber, so that a large tension can be generated in the tension belt. When the inflation and deployment of the airbag is completed, sufficient tension can be generated on the lower edge side of the airbag.

In practicing the present invention, the auxiliary inflation chamber surrounds an upper portion of the non-expandable portion to which the base end of the tension belt is fixed and a through hole provided in a lower portion of the non-expandable portion, and is provided at both ends. When the airbag is inflated and deployed (in the case of the invention according to claim 5), the airbag inflates and deploys from the upper and lower ends of the vertically connected inflatable portion to both ends of the auxiliary inflation chamber. The gas flows into the auxiliary expansion chamber.

Therefore, the generation of wrinkles in the non-expandable portion surrounded by the auxiliary expansion chamber can be suppressed. In addition, the auxiliary expansion chamber has increased rigidity (shape retention performance) during expansion by communicating with the upper and lower ends of the vertically connected expansion section at both ends, so that the tension generated in the tension belt can be accurately measured. Can be maintained.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the first embodiment of the present invention.
Embodiment 1 is shown, and in this first embodiment,
An airbag 11 for protecting a head Hf of a front seat occupant and a head Hr of a rear seat occupant by inflating and deploying a head protection airbag device 10 in a curtain shape at a side portion in a vehicle cabin; And a tension belt 13 for tensioning the entire airbag 11.

The airbag 11 has a front seat inflatable portion 11b and a rear seat inflatable portion 11c in front and back of the central non-inflating portion 11a.
, A gas inflow portion 11d at a rear upper portion, a front non-inflation portion 11e at a lower front portion, and a plurality of mounting pieces 11f at an upper edge portion. The airbag 11 is assembled to the front pillar 21, the roof side rail 22, and the quarter pillar 23 of the vehicle body with each mounting piece 11 f. The airbag 11 is housed along the front pillar 21, the roof side rail 22 and the quarter pillar 23 in a folded state, and is covered with the front pillar garnish 31, the periphery of the roof head lining 32, and the quarter pillar garnish 33. It has become so.

The airbag 11 has a gas inflow portion 11.
d, a main expansion chamber Pa extending obliquely downward from the front in a substantially linear manner, and a front and rear sub-expansion chamber Pb for front seats, which is provided in parallel above and below a front portion of the main expansion chamber Pa and extends in the front-rear direction. , Pc, and a vertical connection expansion portion Pd that connects the front ends of the two sub-expansion chambers Pb, Pc and the front end of the main expansion chamber Pa in the vertical direction. Lower auxiliary expansion chamber Pc for front seat
Communicates with the middle part of the main expansion chamber Pa at the rear end,
The upper sub-expansion chamber Pb for the front part of the main expansion chamber Pa and the front seat
Thus, the front seat inflatable portion 11b of the airbag 11 is configured.

The airbag 11 is provided with an upper auxiliary inflation chamber Pb.
And an extended expansion chamber Pe continuously extending forward from the front end of the front pillar 21 and located above the front pillar 21.
Has an auxiliary inflation chamber Pf extending downward along the tension belt 13 from the intermediate portion. The extended inflation chamber Pe is inflated by the inflow of gas when the airbag 11 is inflated and deployed,
When the occupant's head Hf comes into contact with the front pillar 21, the impact is reduced. The auxiliary expansion chamber Pf includes a front non-expansion portion 11e provided at a front portion adjacent to the vertical connection expansion portion Pd.
The airbag 11 is inflated by inflow of gas when the airbag 11 is inflated and deployed, thereby suppressing wrinkles in the front non-inflated portion 11e.

The airbag 11 has a pair of upper and lower rear sub-inflation chambers Pg and Ph which extend rearward in communication with the middle portion of the main inflation chamber Pa. Rear sub-expansion chamber Pg,
Ph constitutes a rear inflation portion 11c of the airbag 11 with the rear portion of the main inflation chamber Pa.

The inflator 12 is for injecting gas toward each of the inflation chambers Pa to Ph of the airbag 11 at the time of a side collision of the vehicle, etc., and is arranged to be inclined along the quarter pillar 23. A bracket 12a provided at the center is attached to the quarter pillar 23 using bolts 51, and a front end of the bracket 12a is fitted airtightly into the gas inflow portion 11d of the airbag 11. The inflator 12 is covered with a quarter pillar garnish 33 together with the rear end of the gas inflow portion 11 d of the airbag 11.

The tension belt 13 is made of a material that is easy to fold and hard to extend.
1 is fixed to the upper part of the front non-inflation portion 11e by sewing, and the intermediate portion 13b is attached to the front non-inflation portion 11 of the airbag 11.
e is movably inserted into a through-hole (slit) 11g provided in the lower part of e, and the tip part 13c is fixed to the lower part of the front pillar 21 using a fixture such as a bolt (not shown).

The tension belt 13 extends along the front non-expandable portion 11e between the vertically connected expansion chamber Pd and the auxiliary expansion chamber Pf at an intermediate portion between the base end portion 13a and the intermediate portion 13b. A configuration in which a predetermined tension is generated by the expansion of the front non-inflatable portion 11e due to the expansion of the vertical connection expansion chamber Pd and the auxiliary expansion chamber Pf (when the airbag 11 expands and expands as shown in FIG. The belt length is set so that tension is generated). The tension belt 13 is attached to the front pillar 2 when the airbag 11 is folded.
When it is stored along the front pillar 21, the roof side rail 22 and the quarter pillar 23, it is stored along the front pillar 21 and is covered by the front pillar garnish 31.

In the first embodiment configured as described above, gas is blown from the inflator 12 at the time of a side collision of the vehicle or the like, and the gas is blown into the gas inflow portion 1 of the airbag 11.
Airbag 11 folded and stored through 1d
When the airbag 11 is supplied to the inside, the airbag 11 deploys by deforming the front pillar garnish 31 and the peripheral portion of the roof head lining 32 toward the vehicle interior, and as shown in FIG. It expands and develops into a curtain shape.

By the way, in the first embodiment,
The main inflation chamber Pa of the airbag 11 is located at the rear gas inflow portion 11.
d, the airbag 1 extends substantially linearly forward.
In the initial stage of deployment of 1, the gas can quickly flow into the main expansion chamber Pa. Further, at the front portion of the airbag 11, the gas flowing into the front end portion of the main inflation chamber Pa can be divided vertically by the inertia force of the gas, and can be quickly led to the vertically connected inflation chamber Pd, and can be vertically connected. Gas can flow from the upper and lower ends of the expansion chamber Pd to the upper and lower auxiliary expansion chambers Pb and Pc.

Therefore, the main inflation chamber Pa and the vertically connected inflation chamber Pd can be quickly inflated from the initial stage of the deployment of the airbag 11, and the area in which the front occupant can be restrained before the inflation and deployment of the airbag 11 is quickly widened. In addition to securing the tension, the tension of the tension belt 13 provided in the adjacent front non-expandable portion 11e can be generated by the expansion of the vertically connected expansion chamber Pd. Since gas flows into the lower sub-inflation chamber Pc also from an intermediate portion of the main inflation chamber Pa, the lower sub-inflation chamber Pc can also be quickly inflated from the initial stage of deployment of the airbag 11.

In the rear part of the airbag 11, the rear sub-inflation chambers Pg, Ph from behind the middle part of the main inflation chamber Pa.
Gas flows into the Therefore, the main inflation chamber Pa and the rear sub-inflation chambers Pg, Ph can be quickly inflated from the initial stage of the deployment of the airbag 11, and the area in which the rear seat occupant can be restrained before the inflation and deployment of the airbag 11 is completed. It can be secured quickly and widely.

When the airbag 11 is inflated and deployed,
At the front portion of the airbag 11, the gas that has flowed into the upper auxiliary inflation chamber Pb flows into the extended inflation chamber Pe, and also flows into the auxiliary inflation chamber Pf provided in the front non-inflation portion 11e. The expansion chamber Pf is expanded. For this reason,
In the expanded extension chamber Pe, the impact when the head Hf of the front seat occupant abuts on the upper part of the front pillar 21 can be reduced.

Further, by the expansion of the auxiliary inflation chamber Pf, it is possible to suppress the occurrence of wrinkles in the front non-inflation portion 11e (the portion where the tension belt 13 is provided). Tension belt 13
The length from the upper portion of the front non-expandable portion 11e to which the base end portion 13a is fixed to the through hole 11g provided in the lower portion of the front non-expandable portion 11e can be accurately secured. Therefore, a sufficient tension can be generated in the tension belt 13 by the expansion of the vertical connection expansion chamber Pd and the expansion of the auxiliary expansion chamber Pf.
Sufficient tension can be generated at the lower edge of the vehicle 1 and the movement of the inflatable portions 11b and 11c to the outside of the vehicle when the occupant is restrained is suppressed.

In the first embodiment, as shown in FIGS. 1 and 2, the auxiliary expansion chamber Pf is extended extension chamber Pe.
The present invention was implemented as a configuration extending downward along the tension belt 13 from an intermediate portion of the first embodiment. However, the auxiliary expansion chamber Pf is, for example, a second embodiment shown in FIG. 3 or a third embodiment shown in FIG. Alternatively, the present invention can be implemented by being configured as in the fourth embodiment shown in FIG.

In the second embodiment shown in FIG. 3, the auxiliary expansion chamber Pf extends forward from the front end of the main expansion chamber Pa and overlaps with an intermediate portion between the base end portion 13a and the intermediate portion 13b of the tension belt 13. ing. For this reason, the gas that has flowed into the main inflation chamber Pa of the airbag 11 flows from the front end of the main inflation chamber Pa into the auxiliary inflation chamber Pf provided in the front non-inflation portion 11e, inflating the auxiliary inflation chamber Pf and tensioning the air. An intermediate portion of the belt 13 between the base end portion 13a and the intermediate portion 13b is pushed in the expansion direction by the expansion of the auxiliary expansion chamber Pf.

Therefore, wrinkles in the front non-inflatable portion 11e of the airbag 11 can be suppressed, and the intermediate portion of the tension belt 13 can be curved along the auxiliary inflation chamber Pf. Thus, a sufficient tension can be generated at the lower edge of the airbag 11 when the inflation and deployment of the airbag 11 is completed.

In the third embodiment shown in FIG. 4 and the fourth embodiment shown in FIG. 5, the upper portion of the front non-expandable portion 11e to which the base end portion 13a of the tension belt 13 is fixed is connected to the front non-expandable portion. An auxiliary expansion chamber Pf is provided so as to surround a through hole 11g provided in a lower portion of the section 11e, and the longitudinally connected expansion section P is provided at both ends thereof through a part or all of the extended expansion chamber Pe.
d communicates with the upper and lower ends. For this reason, when the airbag 11 is inflated and deployed, the auxiliary inflation chamber P passes through a part or all of the extended inflation chamber Pe from the upper and lower ends of the vertically connected inflation portion Pd.
Gas flows to both ends of f, and the auxiliary expansion chamber Pf expands.

Therefore, the generation of wrinkles in the front non-expandable portion 11e surrounded by the auxiliary expansion chamber Pf can be suppressed. In addition, the auxiliary expansion chamber Pf communicates with the upper and lower ends of the longitudinally connected expansion section Pd at both ends, so that rigidity (shape retention performance) at the time of expansion is increased, and the tension belt 1 is expanded.
The tension generated in 3 can be accurately maintained.

In the above embodiments, the airbag 11 protects the head Hf of the front passenger and the head Hr of the rear passenger.
Although the present invention has been implemented in a head protection airbag device provided with a head protection airbag device having an airbag that protects only the head of the front seat occupant, the present invention can be similarly implemented. is there.

In each of the above embodiments, gas is supplied from the inflator 12 disposed at the rear of the vehicle to the gas inflow portion 11d provided at the upper end of the rear end of the airbag 11, and the front end of the airbag 11 is connected to the front pillar. The present invention has been applied to a head protection airbag apparatus in which a tension belt 13 is provided between the airbags 21. Gas is supplied from an inflator provided in front of the vehicle (lower part of a front pillar) to a gas inlet provided at a front end of the airbag. Is supplied, and a tension protection belt is provided between the rear end of the airbag and the quarter pillar.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a head protection airbag device according to the present invention.
It is a side view showing the embodiment.

FIG. 2 is a side view of a main part in a state where the airbag and the tension belt shown in FIG. 1 are simply deployed.

FIG. 3 shows a second embodiment of the head protection airbag device according to the present invention.
FIG. 3 is a diagram corresponding to FIG. 2, showing the embodiment.

FIG. 4 shows a third embodiment of the head protection airbag device according to the present invention.
FIG. 3 is a diagram corresponding to FIG. 2, showing the embodiment.

FIG. 5 shows a fourth embodiment of the head protection airbag device according to the present invention.
FIG. 3 is a diagram corresponding to FIG. 2, showing the embodiment.

FIG. 6 is a side view of a main part of a head protection airbag device proposed in Japanese Patent Application No. 11-150360.

[Explanation of symbols]

10 ... Head protection airbag device, 11 ... Airbag, 1
1a: central non-expandable portion; 11b: front-seat inflatable portion;
Rear inflatable portion, 11d: gas inflow portion, 11e: front non-inflatable portion, 11f: mounting piece, 11g: through hole (slit), P
a: Main expansion chamber, Pb, Pc: Upper and lower auxiliary expansion chamber for front seat, P
d: vertically connected expansion chamber, Pe: extended expansion chamber, Pf: auxiliary expansion chamber, Pg, Ph: upper and lower auxiliary expansion chambers for rear seat, Hf: head of front seat occupant, Hr: head of rear seat occupant, 12 ... inflator, 13 ... tension belt, 13a ... base end of tension belt,
13b: middle part of tension belt, 13c: tip part of tension belt, 21: front pillar, 22: roof side rail, 23: quarter pillar, 31: front pillar garnish, 32: roof head lining, 33: quarter pillar garnish.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshinori Tanase 1 Ochiai, Nagata, Kasuga-cho, Nishi-Kasugai-gun, Aichi F-term in Toyoda Gosei Co., Ltd. 3D054 AA02 AA03 AA04 AA07 AA16 CC04 CC06 CC10 CC11 FF11

Claims (5)

[Claims] 1. An airbag that is assembled to a vehicle body at an upper edge portion and is inflated and deployed in a curtain shape at a side portion in a vehicle cabin to protect an occupant's head, and tension is applied to a lower edge side of the airbag. A head protection airbag device comprising a tension belt to be generated, wherein the airbag is adjacent to the tension exerting inflatable portion extending substantially vertically in a front-rear direction end side. The tension belt has a base end fixed to an upper part of the non-expandable part, an intermediate part movably inserted into a through hole provided in a lower part of the non-expandable part, and a distal end. A head mounted on the vehicle body, wherein the non-inflating portion of the airbag is further provided with an auxiliary inflation chamber which is inflated when the airbag is inflated and deployed to suppress wrinkles. Protective airbag device. 2. The airbag according to claim 1, further comprising a main inflation chamber extending substantially linearly from the gas inflow portion on one end to the other end, and provided in parallel above and below the other end of the main inflation chamber. A vertical connection expansion section for connecting the other end of each of the two sub-expansion chambers and the other end of the main expansion chamber in the vertical direction. The head protection airbag device according to claim 1, comprising: 3. The airbag is provided with an extended inflation chamber extending from the other end of the upper sub-inflation chamber to the other end of the airbag and located above a pillar, and the auxiliary inflation chamber is provided with the extended inflation chamber. The head protection airbag device according to claim 2, wherein the head protection airbag device extends downward along the tension belt from an intermediate portion of the expansion chamber. 4. The apparatus according to claim 1, wherein the auxiliary expansion chamber extends from the other end of the main expansion chamber to the other end, and overlaps an intermediate portion between the base end and the intermediate portion of the tension belt. The head protection airbag device according to claim 2, wherein 5. The auxiliary expansion chamber surrounds an upper part of the non-expandable part to which a base end of the tension belt is fixed, and a through hole provided in a lower part of the non-expandable part. The head protection airbag device according to claim 2, wherein the head connection airbag device communicates with upper and lower ends of the vertical connection inflatable portion.