JPH1191493A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure, and to facilitate the control of operation by fixing peripheral ends of both a first and a second side panels to each other so as to form a bag, and stretching a baffle of the impervious material having a through part and for covering the full surface of the inner surface of a panel of one chamber between both the panels so as to regulate the cross dimension between the panels, and dividing inside of the bag into two chambers. SOLUTION: When an inflator 31 is ignited on the basis of the signal and the gas G is injected from an injection port 33 in a direction expressed with an arrow, a chest supporting part 42 of an air bag is quickly expanded toward a front side of an automobile. Continuously, the gas G is led to a head supporting part 41 side, and the chest supporting part 42 enters between a chest of an occupant and a door trim and a center pillar inner panel so as to absorb the secondary collision energy of the occupant. Cross dimension between a first and a second side panels is regulated by a baffle 63 of the impervious material so as to prevent the leak of the gas G to the outside. With this structure, appropriate expanding timing and operation of the air bag can be easily tuned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device which is inflated instantaneously to protect an occupant of a vehicle when the vehicle collides, particularly when another vehicle collides with a side surface of the vehicle, that is, in a so-called side collision.

[0002]

2. Description of the Related Art As such a conventional airbag device,
For example, US Pat. No. 5,586,782 or JP-A-8-2
Japanese Patent No. 44552 discloses an example.

The former, that is, a side impact airbag device (DUAL PRESSURE) shown in US Pat. No. 5,586,782.
SIDE IMPACT AIR BAG) is an air bag that is normally folded and stored in the case body in the seat back. When a side collision of the car is detected, when the collision is detected, an electric signal is sent to the inflator via the ignition harness. And send
The gas generated from the ignited inflator expands by being introduced from the gas outlet, pushes the lid of the case body open and swells toward the front side, and expands in the space between the occupant and the side wall of the passenger compartment. The airbag absorbs the impact when the occupant makes a secondary collision with the side wall of the vehicle interior.

[0004] The airbag has a substantially L-shape between the head support and the chest support, and the gas blown out from the inflator first supplies the gas to the chest support, and then the chest support and the head. By pushing up the vent cover of the inner panel (separator) that divides the upper and lower support parts, and supplying gas to the head support part, both support parts are filled with gas.

Further, the latter, that is, Japanese Patent Application Laid-Open No. 08-2445
No. 52, similar to the former, the airbag for side collision is normally folded and stored in a seat back, and when an automobile crashes, a gas from an inflator is stored in the airbag. By injecting the airbag, the airbag is rapidly inflated, thereby absorbing the impact of the occupant when the passenger collides with the side wall of the vehicle interior.

[0006]

However, in the structure of such a conventional airbag device, measures are taken to prevent gas supplied from the mouth of the airbag of the airbag device from leaking from a gap in the airbag itself. It has not been. In this case, it is necessary to increase the size of the inflator so that the gas amount of the inflator is increased in consideration of gas leakage in advance, and there is a limit in mounting the airbag device in a small portion such as a seatback, etc. become,
Improvement is required.

Further, according to a well-known technique disclosed in Japanese Patent Application Laid-Open No. 3-208745 as a coating on the inner surface of the airbag itself, it is not easy to control the proper deployment timing and behavior of the airbag. There is a need for improvement.

The present invention has been made in consideration of the conventional problems as described above, and aims at simplifying the structure of the airbag, reducing the size of the inflator, and appropriately deploying the airbag at an appropriate timing and behavior. It is an object of the present invention to provide an airbag device that can easily tune the airbag.

[0009]

In order to achieve the above object, an invention according to claim 1 is to provide an airbag which is normally folded, and to inflate the airbag by supplying gas into the airbag. An airbag device comprising: an inflator to be obtained; wherein the airbag is formed in a bag shape by fixing peripheral ends of both first and second side panels having air permeability. A baffle having a penetrating portion is bridged between the first and second side panels of the airbag to restrict the width between the first and second side panels to be within a predetermined dimension, and to form the inside of the bag. Is divided into two rooms, and the baffle is made of an air-impermeable material that covers the entire inner surfaces of the first and second side panels constituting one of the rooms of the airbag.

According to the first aspect of the present invention, the baffle regulates the width dimension between the first and second side panels and the gas supplied from the inflator is reliably prevented from leaking to the outside. It is possible to simplify the bag structure and easily tune appropriate deployment timing and behavior of the airbag.

[0011] Further, by making the gas permeability of one room lower than that of the other room, the gas does not escape from one room before reaching the other room. The gas amount of the inflator required for performance can be suppressed. Therefore, the size of the inflator can be reduced, and the degree of freedom in mounting on an automobile can be increased.

According to a second aspect of the present invention, in the airbag device according to the first aspect, one room of the airbag serves as an occupant's chest protection portion and the other room serves as an occupant's head protection portion. It is characterized by the following.

According to the second aspect of the present invention, since the occupant's head and chest can be reliably protected and the chest protector is located in one room, the chest protector which first receives the supply of gas from the inflator is: First, the movement of the occupant's upper body can be prevented. Subsequently, the head that moves late can be protected by the head protection portion expanded by the gas supplied through the through portion.

[0014] The invention of claim 3 is claim 1 or claim 2.
Wherein the through portion of the baffle comprises a through hole formed in an upper surface portion bridging between the first and second side panels of the air bag.

According to the third aspect of the present invention, since the through portion is formed only by providing the through hole in the upper surface portion of the baffle, simple cutting can be performed.

[0016] The invention of claim 4 is the invention of claim 1 or claim 2.
5. The airbag device according to claim 1, wherein the through portion of the baffle has a notch formed in an upper surface portion bridging between the first and second side panels of the airbag, and the first and second cutouts of the airbag. It is characterized in that it is formed between the inner surface of both or either of the two side panels.

According to the fourth aspect of the present invention, a cutout is provided in the upper surface of the baffle, and the through portion is formed only by contacting the inner surface of the first or second side panel or either one of the side panels of the airbag. So simple cutting is sufficient.

The invention according to claim 5 is the invention according to claims 1 to 4.
Wherein the baffle is made of a material having both a reinforcing function and a flameproofing function.

According to the fifth aspect of the present invention, since it is only necessary to fix the baffle to both the first and second side panels of the airbag, control of gas flow, shape, position, quantity of the ventilation portion, and the like are performed. It is easy to change the airbag, and by tuning these, it is possible to easily control appropriate deployment timing and behavior of the airbag.

[0020]

According to the first aspect of the present invention, the width of the first and second side panels is restricted by the baffle, and the gas supplied from the inflator is reliably prevented from leaking to the outside. In addition, it is possible to simplify the airbag structure and easily tune appropriate deployment timing and behavior of the airbag.

Further, by making the gas permeability of one room lower than that of the other room, the gas does not escape from one room before reaching the other room, so that occupant protection is prevented. The gas amount of the inflator required for performance can be suppressed. Therefore, the size of the inflator can be reduced, and the degree of freedom in mounting on an automobile can be increased.

According to the second aspect of the present invention, since the occupant's head and chest can be reliably protected and the chest protector is in one room, the chest protector which first receives the supply of gas from the inflator is: First, the movement of the occupant's upper body can be prevented. Subsequently, the head that moves late can be protected by the head protection portion expanded by the gas supplied through the through portion.

According to the third aspect of the present invention, since the through portion is formed only by providing the through hole in the upper surface portion of the baffle, simple cutting can be performed.

According to the fourth aspect of the present invention, a cut-out is formed in the upper surface of the baffle, and a through portion is formed only by contacting the inner surface of the airbag with the first and / or second side panels. So simple cutting is sufficient.

According to the fifth aspect of the present invention, since it is only necessary to fix the baffle to both the first and second side panels of the airbag, it is possible to control the flow of gas, the shape, the position and the quantity of the ventilation portion. It is easy to change the airbag, and by tuning these, it is possible to easily control appropriate deployment timing and behavior of the airbag.

[0026]

1 to 7 show an embodiment of the present invention. As shown in FIGS. 1 and 2, a seat 1 comprises a seat back 2 and a seat cushion 3, and The back 2 is disposed at a position facing the side wall of the vehicle interior such as the door trim 4 and the center pillar inner panel 5. Reference numeral 6 denotes a headrest, reference numeral 7 denotes a lap belt, and reference numeral 8 denotes a shoulder belt.

As shown in FIG. 2, the seat back 2 includes a seat back frame 10, a cushion pad 11 disposed on a front side FR of the seat back frame 10, and a lateral side of the seat back frame 10. Outside)
A side cushion 12 disposed on the SD, a slab urethane-like first cushioning member 13 disposed on the front side FR of the center CT of the cushion pad 11, and a first skin 14 covering the first cushioning member 13 A slab urethane-shaped second cushioning member 15 disposed on the front side FR of the side SD of the cushion pad 11, a second skin 16 covering the second cushioning member 15, and a side of the side cushion 12. SD
Urethane-shaped third cushioning member 17
A third skin 18 covering the third cushioning member 17; a side portion of the cushion pad 11;
An airbag device 19 disposed between the inner surfaces of the airbag device by means to be described later, and a sewing portion 20 holding the first cushioning member 13, the first skin 14, the second cushioning member 15, and the second skin 16; , The second cushioning member 15, the second skin 16, and the third
A cleaved portion 21 sewn so as to divide the cushioning member 17 and the third skin 18 at a predetermined pressure, and one is sewn to the cleaved portion 21 and the other is the seatback frame 1.
0, the cloth-like protection member 23 that protects the side cushion 12 by being held by the wire 22, the side cushion 12, the third cushioning member 17, and the third skin 1.
8 comprises a sewing portion 24.

As shown in FIG. 4, the airbag device 19 has an inflator 31 which can be ignited by transmitting a collision electric signal from a sensor (not shown), and a mouth portion 34 at an ejection port 33 of the inflator 31. And is always folded, and the inflator 3
A case body 37 made of synthetic resin having an airbag 35 that can be inflated by the gas G ejected from the airbag 35 and an opening 36 that covers the inflator 31 and the airbag 35 and that can be torn by the inflation of the airbag 35 (FIG. 2
Reference).

As shown in FIGS. 2 and 3, the inflator 31 is provided with a bolt member 38 projecting therefrom. The bolt member 38 is exposed to the outside through a through hole (not shown) of the case body 37. The seat back frame 10 is provided by being screwed together with a nut 40 inserted into a through hole (not shown) of the seat back frame 10. At this time, the ejection port 33 of the holder 32 faces the front side FR and is disposed on the lower side DW.

As shown in FIG. 1, the airbag 35 is provided with a head support portion 41 as the "other room" and a chest support portion as the "one room" by the gas G jetted from the inflator 31. It is formed in a bag shape which can be inflated in a substantially L-shape with the portion 42, and is normally folded.

The airbag 35 is formed in a bag shape by fixing the peripheral ends of both the first side panel 60 and the second side panel 61 having air permeability by sewing.

A baffle 63 is bridged between the first and second side panels 60 and 61 of the airbag 35,
The width between the first and second side panels 60 and 61 is regulated so as to be within a predetermined dimension, and the inside of the bag is divided into two rooms, that is, the head support 41 and the chest support 42. It becomes.

The baffle 63 is made of an air-impermeable material having both a reinforcing function and a flameproofing function. The first and second baffles 63 constitute the chest support portion 42 of the airbag 35.
Side portions 64 and 65 covering the entire inner surfaces 60a and 61a of the side panels 60 and 61, and the first and second side panels 6
An upper surface portion 66 bridging between 0 and 61 is provided with a through-hole 62 as a “through portion” in the upper surface portion 66.

As shown in FIG. 8, the "through portion" of the baffle 63 is not limited to the through hole 62, and the notch 67 formed in the upper surface portion 66 and the first,
The second side panels 60 and 61 may be formed between the inner surface and both or either of them.

As described above, since the embodiment of the present invention is constituted, the inflator 31 is ignited by a certain signal, and the gas G is discharged from the outlet 33 as shown in FIG.
When the air is blown out as indicated by the white arrow, as shown in FIG. 2, the folded airbag 35, particularly the chest support portion 42, is directed toward the front side FR of the vehicle by the gas G blown out from the inflator 31. Expands quickly,
The opening 36 of the case body 37 that covers the airbag 35 is opened, the case body 37 is opened substantially linearly, and the airbag 35 further expands.

That is, the chest support portion 42 of the airbag 35, which is normally folded, is first inflated, and then the gas G can be guided to the head support portion 41 side. The chest support portion 42 reliably enters between the door trim 4 and the center pillar inner panel 5, and can sufficiently absorb the secondary collision energy of the occupant to the door trim 4 and the center pillar inner panel 5.

The baffle 63 regulates the width between the first and second side panels 60 and 61 and reliably prevents the gas G supplied from the inflator 31 from leaking to the outside. The simplification and the appropriate deployment timing and behavior of the airbag 35 can be easily tuned.

Further, by making the gas G air permeability of the chest support portion 42 lower than that of the head support portion 41, the gas G
Does not come off from the chest support portion 42 before reaching the head support portion 41, and the gas amount G of the inflator 31 necessary for occupant protection performance can be suppressed. Therefore, the size of the inflator 31 can be reduced, and the degree of freedom of mounting on the vehicle can be increased.

The occupant's head and chest can be reliably protected by the head support portion 41 and the chest support portion 42, and the chest protection portion 42 which receives the supply of the gas G from the inflator 31 first.
Thus, the upper body of the occupant can be prevented from moving. Subsequently, the head that moves with a delay can be protected by the head protection portion 41 expanded by the gas G supplied through the through hole 62.

The through-hole is formed only by providing the through-hole 62 in the upper surface 66 of the baffle 63, so that simple cutting is sufficient. This is because a notch 67 is provided in place of the through hole 62, and the first and second side panels 6 of the airbag 35 are provided.
Even if the inner surface is brought into contact with the inner surface by either or both 0 and 61, simple cutting is sufficient.

Since it is only necessary to fix the baffle 63 to both the first and second side panels 60 and 61 of the airbag 35, the flow of the gas G is controlled, and the shape, position,
It is easy to change the quantity, etc., and by tuning these, the appropriate deployment timing of the airbag,
Behavior can be easily controlled.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a seat on which an airbag device according to an embodiment of the present invention is mounted.

FIG. 2 is a sectional view taken along line SA-SA of FIG.

FIG. 3 is a cross-sectional view showing a state in which the airbag has expanded from the state shown in FIG. 2;

FIG. 4 is a side view when only the airbag of FIG. 1 is inflated.

FIG. 5 is a sectional view taken along line SB-SB in FIG. 4;

6 is an exploded perspective view of the airbag of FIG.

FIG. 7 is a plan view of the baffle of FIG. 6 in an expanded state.

FIG. 8 is a plan view of a baffle according to another embodiment of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 10 Seat back frame 19 Airbag device 21 Cleavage part 31 Inflator 33 Spout port 34 Mouth part 35 Airbag 36 Opening 37 Case main body 41 Head support part (other room) 42 Chest support part (one side) 60) First side panel 61 Second side panel 62 Through hole as penetration part 63 Baffle 65 Top surface part 67 Notch

Claims (5)

[Claims] 1. An airbag which is normally folded,
An airbag device comprising: an inflator capable of inflating the airbag by supplying a gas into the airbag, wherein the airbag is provided around both the first and second side panels having air permeability. The airbag is formed in a bag shape by fixing the end portion, and a baffle having a penetrating portion is bridged between the first and second side panels of the airbag. And the inside of the bag is divided into two rooms, and the baffle is provided for the first and second side panels constituting one room of the airbag. An airbag device comprising an air-permeable material that covers the entire inner surface. 2. The airbag device according to claim 1, wherein one of the rooms of the airbag is a chest protector for an occupant,
An airbag device, wherein the other room is used as a head protection portion for an occupant. 3. The airbag device according to claim 1, wherein the penetrating portion of the baffle includes a first and a second portion of the airbag.
An airbag device comprising a through hole formed in an upper surface portion bridging between side panels. 4. The airbag device according to claim 1, wherein the penetrating portion of the baffle includes a first and a second portion of the airbag.
An airbag device formed between a notch formed in an upper surface portion bridging between side panels and an inner surface of both or one of the first and second side panels of the airbag. . 5. The airbag device according to claim 1, wherein the baffle is made of a material having both a reinforcing function and a flameproofing function.