JP5396091B2 - Airbag device for passenger seat - Google Patents

Description

  The present invention relates to an airbag device for a passenger seat, which is mounted on a passenger seat of a vehicle and protects an occupant in the event of a vehicle collision, and which has improved airbag deployment at the time of close deployment.

It is widely used today that air bags are equipped as a means for absorbing and mitigating shocks to passengers in vehicle collisions. Airbags are instantly deployed in response to vehicle collisions, etc., and catch an occupant. It is important that the airbag be deployed quickly and smoothly.
However, normal airbag deployment assumes that the occupant is sitting in the regular seating position and wearing the seat belt, and the occupant is sitting near the instrument panel in front of the regular position. There is a need for an effective airbag device for reducing the impact exerted on an occupant by airbag deployment, that is, when the airbag is deployed in close proximity.
As a related art, in an airbag device for a passenger seat that is disposed on an instrument panel of a passenger seat and deploys the bag with a detection signal from a collision sensor to protect the passenger in the passenger seat, the airbag device includes a bag A case having an upward opening that discharges it when the air bag is deployed, and storing and installing a folded airbag, inflator, etc. in the case, and covering the opening with a lid plate. And the airbag device is housed and installed in an opening formed in the instrument panel, and the cover plate is disposed so as to close the opening of the instrument panel. There is an airbag device for a passenger's seat (see, for example, Patent Document 1), characterized in that a regulation guide piece that regulates the deployment direction of the bag is provided in the vicinity of the indoor side opening portion. There.

Japanese Utility Model Laid-Open No. 6-25057 (refer to the field of claims for utility model registration, the detailed description of the invention, and FIGS. 1 to 5)

The conventional technology prevents damage to the surface of the instrument panel by deploying the airbag without causing interference with the opening of the instrument panel when the airbag is deployed.
However, the above-mentioned conventional technology only prevents damage to the surface of the instrument panel when the airbag is deployed, and prevents an impact on the object at the initial deployment of the airbag when the airbag is deployed (out-of-position). That was unthinkable.
The present invention provides an airbag device for a passenger seat that solves these problems.

A first invention of the present invention capable of achieving the above object is an airbag device for a passenger seat as described in claim 1, and is as follows.
In an airbag device having an airbag installed in an instrument panel and opening the instrument panel surface panel and deploying rearward, the airbag device stores a folded airbag and is mounted on the instrument panel surface panel. A container part having an opening on the opposite side, and a deployment door part having a predetermined breakage part on the instrument panel surface panel covering the opening, the opening is provided in the middle of the container part in the left-right direction. restrictor piece which bulges toward the central portion is extended, and Ri Na and expansion passage is formed in the left and right ends, the expansion restricting piece has an opening and a front edge and a rear edge of the opening The instrument panel surface is formed in a trapezoidal shape having a pair of edges facing each other toward the center of the section, and having a bottom edge side bottom edge and a top bulging tip side top edge. Bulging tip is being inclined so as to be closer to the panel, and expand the flanks of the air bag deployment deployment door portion is configured such that the center portion becomes the deployment order to finally expand.

Since the passenger seat airbag apparatus according to the present invention has the configuration as described above, the following effects are achieved.
(1) Not only can the normal airbag deployment be performed suitably, but also the impact on the object at the beginning of the airbag inflation can be reduced even when the airbag is in close proximity deployment when the object is in an out-of-position state. it can.
(2) Since it can be retrofitted to an airbag module in an existing airbag device, it is excellent in versatility.

It is a schematic perspective view which shows an example of the airbag module provided with the expansion | deployment control piece which is the characteristic of the airbag apparatus for passenger seats of this invention. It is a schematic side view showing an example of an airbag module provided with a deployment regulating piece, which is a feature of the airbag device for a passenger seat of the present invention. It is a schematic front view which shows an example of the airbag module provided with the expansion | deployment control piece which is the characteristics of the airbag apparatus for passenger seats of this invention. It is a schematic perspective view which shows an example of the inside of a vehicle provided with the airbag apparatus for passenger seats of this invention. It is a principal part schematic sectional drawing which shows the AA line cross section of FIG.

In an airbag device having an airbag installed in an instrument panel and opening the instrument panel surface panel and deploying rearward, the airbag device stores a folded airbag and is mounted on the instrument panel surface panel. A container part having an opening on the opposite side, and a deployment door part having a predetermined breakage part on the instrument panel surface panel that covers the opening part, A deployment regulating piece having a trapezoidal shape having an edge side bottom and an bulging tip side top forming an upper base, and the deployment regulating piece opens from the front edge and the rear edge of the opening. Make a pair so as to face each other toward the center of the part, incline so that the bulging tip is close to the instrument panel surface panel, and obliquely inflate the airbag Is extended so as to bulge, is formed expanded passage to the left and right ends, the expansion restricting piece are opposed to each other toward the center of the opening from the front edge and the rear edge of the opening The trapezoidal shape has a pair of bottom edge and bottom edge that forms the bottom and a top edge that forms the top and is inclined so that the bulging edge is close to the instrument panel surface panel. Thus, the airbag device for the passenger seat is formed so that the airbag is deployed from both sides of the deployment door portion and the center portion is deployed last .

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view showing an example of an airbag module having a deployment regulating piece, FIG. 2 is a schematic side view showing an example of an airbag module having a deployment regulating piece, and FIG. 4 is a schematic front view showing an example of the provided airbag module, FIG. 4 is a schematic perspective view showing an example of the interior of the vehicle provided with the airbag device for a passenger seat of the present invention, and FIG. 5 is a line AA in FIG. It is a principal part schematic sectional drawing which shows a cross section.

As can be understood from FIG. 1, in the airbag device for a passenger seat according to the present invention, two deployment regulating pieces 2 are formed in the airbag module 1.
The deployment regulating piece 2 is divided into three equal parts on the side of the airbag module 1 that is the front side when viewed from the passenger side when the passenger seat airbag device is installed.
This is for improving the shape of the airbag 4 when the airbag is deployed.
Further, the side portion 3 of the deployment restricting piece 2 is notched so as to be easily deployed when the airbag is deployed. That is, the deployment restricting piece 2 is formed in a trapezoidal shape. Specifically, the length of the upper base of the isosceles trapezoid is about 1/3 of the length of the lower base.
The deployment restricting piece 2 can be variously adopted from a high rigidity to a low rigidity. However, the deployment restriction piece 2 is easily deformed by the airbag deployment force and has a rigidity that does not reduce the effect of the present invention. Is.
For example, a steel plate having a thickness of 1.2 mm is used as a steel plate constituting the case main body portion of the airbag module 1, and a steel plate having a thickness of 0.5 to 0.8 mm is used as the deployment restriction piece 2.

FIG. 3 shows a connection state between the airbag module 1 and the deployment restricting piece 2, and the lengths a and b in the figure indicate the air bag when the deployment restricting piece 2 is completely bent. The bag module 1 can be covered, but the length is such that the paired development regulating pieces 2 do not overlap each other.
Further, as shown in the drawing, the angles c and d are preferably 10 ° to 40 °, and if the angle is less than 10 °, the deployment of the airbag 4 is hindered. If the air bag 4 becomes larger than 40 °, the deployment force of the airbag 4 cannot be suppressed, and the advantageous effect of deploying the airbag under the out-of-position characteristic of the present invention cannot be exhibited. Is.

  Therefore, the airbag device for a passenger seat according to the present invention is provided in the front portion of the passenger seat of the vehicle (see FIG. 4), and as shown in FIG. Since the airbag is deployed from both sides of the airbag module 1 and the center portion is deployed last, the airbag is deployed out-of-position when the airbag is deployed. The object is covered from both sides and finally the center part of the airbag is softly pushed, and the impact on the object under the out-of-position can be reduced.

In addition, in the said Example, although the thing with the same angle was shown for the connection angle of the right and left expansion | deployment control piece 2, it is also possible to change and provide a left-right angle.
For example, by making the angle of the deployment restriction piece 2 on the windshield side smaller than the angle of the other deployment restriction piece 2, the airbag deployment operation is such that the airbag is first inflated to the windshield side when the airbag is deployed. It is also possible to change.
Moreover, although the thing which provided the deployment control piece 2 on both sides was shown in the said Example, it is also possible to provide the deployment control piece 2 only in one side by changing the length of the deployment control piece 2. FIG.
In the present embodiment, the trapezoidal shape of the development restricting piece 2 is shown, but it is needless to say that the shape is not limited to the trapezoid, and various shapes such as a semicircular shape and a semielliptical shape can be adopted.

  It can be used not only in a passenger seat of an automobile but also in an airbag device used in a rear seat.

DESCRIPTION OF SYMBOLS 1 .... Airbag module 2 .... Deployment restriction piece 3 .... Side part 4 .... Air bag

Claims (1)

In an airbag device having an airbag installed in an instrument panel and opening the instrument panel surface panel and deploying rearward, the airbag device stores a folded airbag and is mounted on the instrument panel surface panel. A container part having an opening on the opposite side, and a deployment door part having a predetermined breakage part on the instrument panel surface panel covering the opening, the opening is provided in the middle of the container part in the left-right direction. restrictor piece which bulges toward the central portion is extended, and Ri Na and expansion passage is formed in the left and right ends, the expansion restricting piece has an opening and a front edge and a rear edge of the opening The instrument panel surface is formed in a trapezoidal shape having a pair of edges facing each other toward the center of the section, and having a bottom edge side bottom edge and a top bulging tip side top edge. The bulging tip is inclined so as to be close to the panel, and the airbag is deployed from both sides of the deployment door part, and the center part is deployed in the final deployment order. Airbag device for passenger seats.

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