JP3237290B2 - Passenger airbag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag which is deployed in the event of a vehicle collision to protect an occupant. More specifically, the present invention relates to an improved airbag device in which the airbag is quickly deployed in the vertical and horizontal directions.

[0002]

2. Description of the Related Art In an emergency, such as a vehicle collision, an airbag device provided in front of an automobile seat inflates (deploys) the airbag rapidly due to the pressure of gas released from a gas generator called an inflator. To protect the occupants.

[0003] In the above-described driver's seat airbag device, it is preferable that the airbag first be deployed rapidly to the occupant vertically or horizontally when the inflator is activated.

FIG. 4 is a perspective view showing an expanded state of the driver's seat airbag. The airbag 14 is formed by sewing peripheral edges of a front panel 10 and a rear panel 12 made of circular cloths. I have. An opening 16 is provided at the center of the rear panel 12 for receiving the tip side of an inflator (not shown). Around the opening 16, a small opening 18 for inserting a bolt or a pin (not shown) for attaching the airbag 14 to the retainer is provided. 20 is for the driver to use the airbag 1
4 is a vent hole for letting out the gas in the airbag 14 when the airbag 4 has been inserted.

[0005] In order for the airbag 14 to first expand left and right or up and down, as shown in Fig. 5 , the front panel 10 and the rear panel 12 are joined by weak sewing threads 22. At the initial stage of the deployment of the airbag 14 by the gas from the inflator, the sewing thread 22 joins the front panel 10 and the rear panel 12, and the airbag 14 is first deployed to the side. Thereafter, when the sewing thread 22 is cut, the airbag 14 is deployed forward.

FIG. 6 is a perspective view showing an unfolded state of the passenger airbag, and FIG. 7 is a longitudinal sectional view of the same, in which gas generated by the inflator flows from the rear opening 30 through the airbag 32.
The airbag 32 is deployed inside the airbag. The airbag 32 is formed by sewing two side panels 36 and 38 on both sides of one center panel 34, and the side panels 36 and 38 are provided with vent holes 40 and 42.

[0007] A tether belt 44 is passed between the front end surface and the rear portion of the airbag 32, and the airbag 32 has
Prevents the distal end surface of the airbag 32 from projecting forward from the state shown in the drawing.

[0008]

The airbag for the driver's seat shown in FIGS. 4 and 5 has a front panel 10 and a rear panel 12.
Need to be sewn together with the sewing thread 22, which takes a lot of time to manufacture.

6 and 7 , both ends of the hanging strap 44 must be sewn to the airbag 32, which is troublesome to manufacture.

[0010]

An airbag according to the present invention comprises:
In passenger-seat airbag that is provided on the opening rear end portion for receiving the gas from the inflator, folded shape but <br/> shed airbag distal end surface so fold multiple pleats facing the opening, The folded portions are bonded to each other with an adhesive, and the adhesive releases the adhesive after at least a part of the airbag is deployed to the side and allows the airbag to be deployed forward. And the adhesive is
It is characterized by being arranged only in an airbag .

[0011]

The airbag for the passenger seat of the present invention , after being deployed laterally by gas from the inflator , adheres to the folds.
The bonding by the agent is released, and the front end surface is developed forward.

[0012]

Embodiments will be described below with reference to the drawings .

[0013] Figure 1 is a perspective view showing a state in the middle of deployment of the passenger-seat airbag according to an embodiment of the present invention, Figure 2 is the first
2 of Figure - sectional view taken along the two-wire, FIG. 3 is an enlarged view of Figure 2.

The passenger seat airbag 70 has an opening 72 at the rear side for receiving gas from an inflator (not shown). The airbag 70 has a structure in which two side panels 76 and 78 are arranged on both sides of a center panel 74, and the side panels 76 and 78 are provided with vent holes 80 and 82. Reference numeral 84 denotes an opening for bolts, rivets, and the like for attaching the airbag 70 to a container of the airbag device for a passenger seat.

[0015] The distal end surface of the air bag 70, shown through
As shown in FIG. 3 , the plurality of folds are folded back and folded in a pleated shape, and the superposed panels 74a and 74b are adhered to each other with an adhesive 86 as shown in FIG. This adhesive 86 is disposed only in the airbag 70.

In the passenger airbag 70 thus configured, gas from an inflator (not shown) is introduced into the airbag 70 from the opening 72 and is deployed.
In this case, since the front end surface is still adhered in a pleated shape with the adhesive 86, the airbag 70 first expands greatly in the vertical and horizontal directions as viewed from the passenger in the passenger seat. After that, the bonding by the adhesive 86 is released, and the folded back folds are extended so that the front end portion of the airbag 70 is also deployed .

[0017] The Contact, if the first view to third Oite the airbag 7 0 passenger seat shown in Figure, the adhesive 8 6 was a thermoplastic resin adhesive between the fabric comrades to be bonded By interposing a thermoplastic resin adhesive 86 therebetween, and then heating the cloth sandwiched from both sides, the cloths can be bonded to each other.

In the present invention, the passenger airbag is not limited to an airbag provided in front of a passenger seat of an automobile, but is also applicable to an airbag disposed in front of an occupant sitting in a rear seat of the automobile. It is.

As described above, according to the present invention, in the assistant's seat airbag of the present invention, the airbag is to deploy toward the front after greatly expanded laterally. In addition, the pleated joints are made by using an adhesive instead of a suture, so that the joining is easy .

[Brief description of the drawings]

1 is a perspective view of the passenger-seat airbag according to the embodiment.

It is a sectional view taken along the two-wire - [2] 2 in Figure 1.

FIG. 3 is an enlarged view of a main part of FIG. 2 ;

FIG. 4 is a perspective view showing a deployed state of a conventional driver's seat airbag.

FIG. 5 is a plan view showing a conventional driver airbag.

FIG. 6 is a perspective view of a conventional passenger airbag.

FIG. 7 is a cross-sectional view of a conventional passenger airbag.

Airbag [sign of the explanation] for the 70 assistant's seat 7 4 Center panel 7 6 side panel 8 0 Baie Ntohoru 8 6 adhesives

Claims (1)

(57) [Claims] 1. An airbag for a passenger seat having an opening for receiving gas from an inflator provided at a rear end thereof, wherein a front end surface of the airbag facing the opening is folded by a plurality of folds.
It is folded in a pleated shape so as to overlap , and the folded portions are adhered with an adhesive, and the adhesive is released after at least a part of the airbag is deployed to the side, and the adhesive is released. It has an adhesive strength that allows it to spread forward, and the adhesive is
An airbag for a passenger seat, wherein the airbag is disposed only in the vehicle.