JP3665880B2 - Airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an airbag apparatus in an automobile or the like, and more particularly to an airbag apparatus in which an inflator is disposed in an airbag.
[0002]
[Prior art]
Conventionally, air bag devices having various structures have been proposed and manufactured. As one of them, an airbag device having a cylindrical structure of an inflator for inflating an airbag is known as one used for a passenger seat.
[0003]
As a structure for mounting this inflator in an airbag, there is, for example, “vehicle airbag and airbag forming method” disclosed in Japanese Utility Model Laid-Open No. 4-292240.
As shown in FIG. 3, the airbag module disclosed herein has a structure in which components are accommodated in a container 101 covered with a module cover 104. That is, the airbag 100 (re-referenced) is formed in a bag shape with a large opening at the bottom, and the airbag has an opening periphery fixed to the container (case) 101 by a bolt 103 or the like, for example. The inflator 102 is disposed in the container so as to be suddenly generated in the event of a collision at the back of the container than the airbag 100. It is fixed.
[0004]
Apart from this, in the “airbag device” disclosed in Japanese Utility Model Laid-Open No. 5-82710, the bag-like airbag 110 shown in FIG. 4 is different from the one shown in FIG. Two insertion holes 112 and 113 into which the cylindrical inflator 111 can be inserted are provided instead of an open configuration. The insertion holes 112 and 113 are provided with flanges 114 and 115, respectively.
The inflator 111 and the airbag are configured such that the heel portions 114 and 115 are sandwiched between both ends of the bone frame 116 disposed in the airbag 110 and both ends of the inflator 111 inserted into the bone frame 116. 110 is fixedly held on the case 120.
[0005]
[Problems to be solved by the invention]
However, when the airbag 100 is inflated, in the airbag apparatus as shown in FIG. 3, a force F that pulls the attachment portion 130 of the airbag 100 outward acts as shown in FIG. As shown in FIG. 6, a reinforcing cloth 103 or the like must be attached to the attachment portion 130 of the airbag 100 by sewing so that the force F can be withstood. For this reason, there is a problem that it takes time to sew the airbag 100 and the cost is increased.
[0006]
In the airbag device shown in FIG. 4, the inflator 111 is inserted into the bone frame 116, so that the outer shape of the bone frame 116 must be larger than the insertion holes 112 and 113. It cannot be inserted into the airbag 110 from the insertion holes 112 and 113.
Therefore, before the airbag 110 is sewn into a bag shape, the bone frame 116 must be inserted into the interior, and then the airbag 110 must be sewn into a bag shape. There was a problem of increased costs.
[0007]
Furthermore, as in another embodiment in Japanese Utility Model Laid-Open No. 5-82710, if the structure is incorporated so that the end portion of the airbag 110 is opened and wound around the bone frame 116, the bone frame 116 is installed in the airbag. Although it becomes easy to insert it into 110, since it becomes necessary to reinforce the attachment part of the airbag 110, it takes time and effort to provide reinforcement as in the conventional example shown in FIG. Problem arises.
[0008]
Accordingly, an object of the present invention is to eliminate the above-described problems, and to provide an airbag device that can easily insert an inflator into an airbag and that does not require reinforcement of the airbag and can save the labor of sewing. That is.
[0009]
[Means for Solving the Problems]
An object of the present invention is to provide an airbag device configured such that the airbag is deployed and inflated by the operation of the inflator, wherein the inflator is disposed in the airbag, and the deployment direction when the airbag is inflated This is solved by an airbag device characterized in that a cut substantially parallel to the inflator is provided in the vicinity of the position where the inflator is provided, and the inflator can be inserted into the airbag from the cut.
[0010]
With this configuration, the inflator can be easily inserted into the airbag that has already been sewn in the shape of a bag from the cut, and the force of pulling the bag fabric when the airbag is inflated depends on the length of the cut. Since only a force parallel to the direction acts and no force in a direction to open the cut does not act, it is not necessary to reinforce around the cut, and the labor of sewing can be saved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an airbag device according to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a main part of an airbag device according to the present invention (showing a state where an airbag is inflated), and FIG. 2 is a cross-sectional view showing a main part in a deployed state when the airbag is inflated. It is.
[0012]
FIG. 1 shows an airbag device 1 according to the present invention, but the overall structure is omitted in the same manner as in the prior art (for example, the case of an airbag device that houses an airbag or an inflator). Only the part is shown.
As shown in FIG. 1, the characteristic part of the airbag apparatus 1 according to the present invention is a configuration in which an inflator 11 is inserted into an airbag 10, which is substantially the same as the deployment direction 14 when the airbag 10 is inflated. A parallel cut 13 is provided at an inflator disposition position (lower end side A in the figure of the airbag), and the cylindrical inflator 11 can be inserted into the airbag from the cut 13. .
[0013]
That is, a cut 13 having a size necessary for inserting the inflator 11 into the airbag 10 is provided in the central portion on the lower side of the airbag 10, and the cut 13 is deployed when the airbag 10 is inflated. It extends parallel to the deployment direction so that the cut 14 is not torn by force.
The inflator 11 is provided with, for example, mounting bolts 12 and 12, and the holes 15 and 15 for taking out the bolts 12 and 12 to the outside of the airbag are on the lower end side A of the airbag 10 and on both sides of the cut 13. Is provided.
Then, in a state where the inflator 11 is inserted into the airbag 10 from the cut line 13, as shown in FIG. 2, the bolts 12, 12 are nuts to the base play 16 of the airbag device or an appropriate case (case 120 in FIG. 4). By fixing via 17, the airbag 10 and the inflator 11 are simultaneously fixed and attached.
[0014]
In the airbag apparatus 1, when the vehicle collides, gas is suddenly released from the inflator 11, and the airbag 11 is inflated by this gas as schematically shown in FIG. At this time, a large force F parallel to the deployment direction 14 acts on the airbag 10.
[0015]
This force F is a force parallel to the cut line 13 and the airbag fabric is appropriately fixed on the lower end side A. Therefore, the lower end side A is the outer peripheral surface of the inflator 11 (particularly the surface corresponding to the lower end side A). ) Can be reliably held with a considerably large area, so that a force that opens the cut 13 sideways does not act directly on the cut.
Therefore, even if the reinforcing cloth is not sewn around the cut line 13, the airbag 10 is not damaged from the cut line 13, and it is possible to increase the production efficiency by omitting the trouble of sewing. Moreover, the inflator 11 can be easily inserted into the airbag 10.
As a result, the production efficiency of the airbag apparatus 1 that is securely held and fixed by the airbag is improved, and the cost can be reduced.
[0016]
【The invention's effect】
As described above, the airbag device of the present invention is a airbag device in which an inflator is disposed in an airbag, and the inflator is inserted into the airbag. Since the airbag is inflated, it acts only when the airbag is inflated, and only forces that are parallel to the cuts are not applied, so there is no need to reinforce the area around the cuts. The work is facilitated and the inflator can be easily assembled. As a result, it is possible to efficiently produce an airbag device that is securely held and fixed, thereby reducing costs.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of an airbag device according to the present invention.
FIG. 2 is a cross-sectional view of an essential part showing an airbag deployment state of the airbag apparatus according to the present invention.
FIG. 3 is a cross-sectional view of a conventional airbag device.
FIG. 4 is an exploded perspective view of a conventional airbag device provided with an airbag configured to surround an inflator.
5 is a cross-sectional view showing a deployed state of the airbag device shown in FIG. 3;
6 is a perspective view of the airbag of the airbag device shown in FIG. 3. FIG.
[Explanation of symbols]
1 Airbag Device 10 Airbag 11 Inflator 13 Cut 14 Deployment Direction 17 Base Plate

Claims (1)

In an airbag device configured so that an airbag is deployed and inflated by operation of an inflator,
The inflator is arranged in an airbag, and a cut that is substantially parallel to the deployment direction when the airbag is inflated is provided in the vicinity of the inflator placement position, and the inflator is inserted into the airbag from the cut. An airbag apparatus characterized by being configured.

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