JP2001055109A - Protective bag and device for automobile occupant's head and automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective bag for an automobile occupant's head with a smooth inflation of the bag and reducing a necessary strength of the bag without locally producing excessive stress. SOLUTION: This protective bag has a main air passage 7 and small chambers from 8a to 8h formed between seats by overlapping the seats and coupling them by a linear coupling part. The main air passage 7 is linearly extended from a bottom end of a front edge part to a rear end of an upper edge part. The small chambers 8f and 8g cross the main air passage 7 running along the upper edge part at an angle θ from 5 deg. to 20 deg.. The other small chambers are extended parallel to the small chambers 8f and 8g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective bag for an occupant's head, and more particularly, to a bag that inflates along a window of a side door when a vehicle collides or rolls over. More specifically, the present invention relates to a protective bag for a head of a vehicle occupant of a type in which gas is introduced into a main airway from a gas inlet and is introduced into a plurality of small rooms from the main airway. Also, the present invention provides a protection device for a vehicle occupant head provided with the protection bag,
The present invention relates to an automobile provided with the protection device.

[0002]

2. Description of the Related Art A protective bag for a vehicle occupant head of this type is described in WO 96/26087, in particular in its FIG. 1 and FIG. The interior of the known bag includes a duct (main airway) extending from the front end (front end) of the bag to the rear end (rear end) of the bag along the upper edge of the bag. And a large number of cell sections (small chambers) connected to the duct section and extending downward.

[0003]

Problems to be Solved by the Invention WO96 / 26087
In the case of the bag, the gas flows into the duct portion from the vehicle rear end side of the duct portion, changes the direction by about 90 °, and flows into each cell portion. Therefore, gas flow resistance near each cell portion is large, In this vicinity, excessive stress is applied to the bag. Further, the gas inflow rate into the cell portion is reduced, and the inflation of the bag is reduced.

It is an object of the present invention to provide a protective bag for a vehicle occupant's head in which the stress applied to each part of the bag is small and which inflates rapidly as a whole, a protective device provided with the protective bag, and a vehicle. Aim.

[0005]

A protective bag for a vehicle occupant's head according to the present invention is disposed near an intersection between a ceiling portion and a side portion of a vehicle interior, and is provided with a gas introduced from a gas inlet. A bag that inflates downwardly along a side surface, the bag having an upper side disposed along a ceiling of an automobile, and in the bag, connected to the gas inlet, at least A main airway extending along the upper side,
In a protective bag for a head of an automobile occupant provided with a plurality of small chambers which are arranged below the main airway and into which gas is respectively introduced from the main airway, the small chamber is a gas outlet of the main airway at an upper side. It extends obliquely so as to intersect at an angle of 5 to 20 ° with respect to the longitudinal direction along the direction.

In such a protective bag for the head of an automobile occupant, the gas introduced into the main airway from the introduction port flows into the small chamber only by slightly changing its outflow direction to 5 to 20 °. The gas flow resistance near the inflow port is extremely small. As a result, the stress applied to each part of the bag is reduced, and the bag is inflated rapidly as a whole.

According to the present invention, the bag has a front side arranged along the A-pillar of the vehicle, and the main airway extends along the front side and the upper side. The gas inlet may be provided below the front side.

In the protective bag according to the present invention, the plurality of small chambers include a first small chamber communicating with the main airway on the upper side, and a second small chamber communicating with the main airway on the front side. ,
A third small chamber communicating with the second small chamber may be provided.

[0009] A protection device for a vehicle occupant head according to the present invention includes the protection bag and an inflator connected to a gas inlet of the protection bag. The automobile of the present invention is provided with this protection device.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a protective bag 1 for a vehicle occupant head according to a first embodiment.
2 is a front view of the bag 1, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III of FIG.
FIG. 5 is a side view of the inside of the vehicle showing the installation state of the protective bag 1.

In the protective bag 1 according to this embodiment, the indoor sheet 2 and the window sheet 3 are overlapped and these sheets 2 and 3 are linearly connected to each other, so that the sheets 2 and 3 The main airway 7 and the small chambers 8a to 8h are formed. Reference numeral 4 denotes a projecting piece for attaching the bag 1 to the roof side member 32 and the A-pillar 31 of the vehicle, and reference numeral 5 denotes an insertion hole for a fastener such as a rivet provided on the projecting piece 4. 33 is C pillar, 34 is B pillar, 35
Indicates a front door, and 36 indicates a rear door.

The main airway 7 is located at the front side 1 along the A pillar.
F extends from the lower end of F to the rear end of the upper side 1U along the edge of the bag 1, a gas inlet 6 is provided at the front lower end, and an inflator 30 is connected.

The sheets 2 and 3 are connected to each other by linear connecting portions 10 and 11 for forming the main airway 7 and linear connecting portions 40 to 49 for forming the small chambers 8a to 8h. This connection may be made by suturing, bonding, welding or the like.

The linear connecting portions 10 and 11 extend from a lower portion of the front side 1F in parallel with the front side 1F to form the main airway 7, and further extend in parallel with the upper side 1U. Upper side 1U
To the rear end. The linear joint 10 is the bag 1
Around the rear side 1R. From the main airway 7, small chambers 8c, 8e, 8f, 8g,
A gas inlet 12 for guiding the gas to 8 h is provided.

The linear coupling portions 45, 46, 47 are connected to the upper side 1
Θ = 5 toward the rear with respect to the linear coupling portion 11 parallel to U
It extends in a diagonally crossing direction so as to have a downward gradient of 20 °. Other linear coupling portions 40 to 44 also extend in parallel with the linear coupling portions 45 to 47.

A small chamber 8a is formed between the linear coupling portions 40 and 41, and a small chamber 8b is formed between the linear coupling portions 41 and 42.
A small chamber 8c is formed between the linear coupling parts 42 and 43, and a small chamber 8d is formed between the linear coupling parts 43 and 44.
A small chamber 8e is formed between the first and second linear connecting portions 45 and 4.
6, a small chamber 8f is formed between the linear coupling portions 46 and 47, a small chamber 8g is formed between the linear coupling portions 46 and 47, and a small chamber 8h is formed between the linear coupling portion 47 and the rear end side of the linear coupling portion 10. I have.

As described above, the small chambers 8c, 8e, 8f to 8h
Is in direct communication with the main airway 7 via the inlet 12.
The small chamber 8a communicates with the small chamber 8b through the opening 13,
b communicates with the small chamber 8c through the opening 14. Komuro 8
d communicates with the small chamber 8e through the opening 15. Komuro 8
f, 8g communicate with each other through the opening 16 and
g and 8h communicate with each other through the opening 17.

The bag 1 is installed with its front part folded along the A-pillar 31 of the vehicle and its middle part to the rear part folded along the roof side rail 32.

The folded bag 1 has a cover (not shown).
Covered with. The cover is configured to tear when the bag 1 expands.

When the vehicle collides sideways or rolls over, the inflator 30 operates and gas flows from the gas inlet 6 into the main airway 7. This gas is supplied from the main airway 7 to each of the small chambers 8a-
8h, and expands each of the small chambers 8a to 8h.

The gas from the inlet 6 first expands the main airway 7 and then expands the small chambers 8a to 8h. In this case, the small chambers 8f, 8g, 8h, especially the small chambers 8f, 8g
5 to 2 with respect to the main airway 7 whose longitudinal direction is parallel to the side 1U.
Since the gas flows at a small crossing angle of 0 °, the gas smoothly expands into the small chambers 8f and 8g. The bag 1 is moved to the door 3 by being pulled by the inflating small chambers 8f and 8g.
The gas is unfolded along the curtains 5 and 36 like a curtain, so that the gas smoothly flows into the other small chambers 8a to 8e and 8h. Therefore, the time required for inflation of the bag 1 is reduced. Further, the stress applied to the sheets 2 and 3 from the gas in the vicinity of each inlet 12 is reduced. Accordingly, the strength required for the bag 1 can be reduced, and the sheets 2 and 3 can be made of a thin and low-strength material. As the seats 2 and 3 become thinner, the folded storage volume of the bag 1 also becomes smaller.

In the above embodiment, the rear side 1R is arranged along the C pillar, but the rear side 1R may be arranged along the B pillar or the D pillar.

Further, in the present invention, the gas inlet of the bag and the inflator may be arranged on the rear side of the vehicle, for example, on a C-pillar, so that the small chamber is inclined downward from the rear toward the front. good.

[0024]

As described above, the protective bag for the head of an automobile occupant of the present invention inflates as a whole more rapidly than the conventional one. For this reason, a small-capacity inflator can be used. ADVANTAGE OF THE INVENTION According to this invention, it is also possible to reduce the stress applied to a bag and to reduce the required intensity | strength of the constituent material of a bag.

[Brief description of the drawings]

FIG. 1 is a front view of a protection bag for an automobile occupant head according to a first embodiment.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a side view of the inside of an automobile provided with the protective bag according to the embodiment.

[Explanation of Signs] 1, 1 'Protective bag for vehicle occupant's head 2 Indoor side seat 3 Window side seat 4 Mounting protrusion 5 Hole 6 Gas inlet 7 Main airway 8a, 8b, 8c, 8d, 8e, 8f, 8g , 8h Small chamber 10, 11, 40-47 Linear connection part 12 Inlet 13, 14, 15, 16, 17 Opening 30 Inflator 31 A pillar 32 Roof side rail 33 C pillar 34 B pillar

Claims (5)

[Claims] 1. A bag which is disposed near an intersection between a ceiling portion and a side portion in a vehicle interior and inflates downward along the side portion by gas introduced from a gas inlet, the bag comprising: Has an upper side disposed along the ceiling of the automobile, and a main airway connected to the gas inlet and extending at least along the upper side in the bag; And a plurality of small chambers, each of which is disposed below the main airway and into which gas is introduced from the main airway, are provided in a protective bag for the head of an automobile occupant. A protective bag for a vehicle occupant head, which extends obliquely so as to cross at an angle of 5 to 20 with respect to a longitudinal direction. 2. The bag of claim 1, wherein the bag has a front side disposed along an A-pillar of the vehicle, and the main airway extends along the front side and the upper side. A protective bag for the head of an automobile occupant, wherein the gas inlet is provided at a lower portion of the front side. 3. The small chamber according to claim 2, wherein the plurality of small chambers are a first small chamber communicating with the main airway on the upper side, a second small chamber communicating with the main airway on the front side, and the second chamber. A protection bag for the head of an automobile occupant, characterized in that a third small chamber communicating with the small chamber is provided. 4. A protection device for a vehicle occupant head comprising the protection bag for a vehicle occupant head according to claim 1, and an inflator connected to a gas inlet of the protection bag. 5. An automobile comprising the vehicle occupant head protection device according to claim 4.