JP4764637B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device for a passenger seat installed in a vehicle.

  2. Description of the Related Art Conventionally, a top-mount type passenger-side airbag device is folded and housed in a case disposed inside an instrument panel (hereinafter, “instrument panel”). In an emergency such as a collision, inflation gas generated by the inflator is introduced, and the airbag body is inflated and deployed from the opening on the upper surface side of the instrument panel to the rear side of the vehicle.

  In such a conventional airbag device for a passenger seat, since the base fabric on the side in contact with the occupant of the airbag main body is difficult to move relative to the occupant, the base fabric is in the middle of inflating and deploying the airbag main body. When there is contact with the occupant, there is a risk of applying a load that causes the occupant to move.

Therefore, in Patent Document 1, as shown in FIG. 3, the surface of the occupant side wall portion 1a disposed on the occupant side at least when the inflatable deployment is completed, is applied to the patch cloth 2 disposed on the outer surface side of the airbag body 1. An airbag device arranged so as to cover the air bag has been proposed. In this airbag apparatus, when the patch 2 comes into contact with the occupant during the inflation and deployment of the airbag body 1, it can move relative to the occupant side wall 1a.
Japanese Patent Laid-Open No. 2003-170795

  By the way, when a child is seated in the passenger seat, for example, during an emergency stop such as a frontal collision, a child with a low seating height is placed on the instrument panel (out-of-position state). In such a case, the airbag body is inflated and deployed on the child's head.

  Therefore, in the airbag device proposed in Patent Document 1, when the airbag body is inflated and deployed, the child's head is in contact with the lower side peripheral wall 1b instead of the patch 2, and the child has a large load on the neck. May cause trouble. This makes it impossible to satisfy recent standards (for example, the US Federal Motor Vehicle Safety Standard FMVSS 208), which are more demanding for further safety improvement and reduction of obstacles during inflation and deployment.

  The problem to be solved by the present invention is that in the conventional airbag device for a passenger seat, there is a possibility that a failure may occur due to a load acting on the neck of the child in the above-described out-of-position state. It is a point that cannot be satisfied.

The airbag device of the present invention is made from such a viewpoint,
For example, even in the event of an emergency such as a frontal collision, even if a low-sitting child sitting in the passenger seat becomes out-of-position with the instrument panel lying down, the inflatable airbag body exerts a load on the child's neck. It makes it possible to reduce effectively.

That is, the airbag device of the present invention is
In an emergency, an airbag device for inflating and deploying an airbag body by introducing an inflation gas generated by an inflator,
The airbag main body is in contact with an occupant seated at least in a normal position when inflated and deployed, and directly provides a restraining force to the occupant.
Adjacent to the front panel, and having a bottom panel that comes into contact with at least a portion of the vehicle instrument panel while the airbag body is inflated and deployed,
When the air bag body for pre-Symbol inflated and deployed passes over the head of the child out of position state, can move relative to the longitudinal direction of the vehicle relative to the bottom surface panel, when passing over the head of the child It is the most important feature Rukoto to have a supplementary panel interposed between the bottom panel.

  The present invention covers at least a part of the bottom panel, which is at least partly in contact with the instrument panel while the airbag body is inflated and deployed, by covering the airbag panel with the auxiliary panel. Relative movement with respect to the bottom panel becomes possible.

  Therefore, even when a child sitting in the passenger seat goes out-of-position with the instrument panel lying down, the inflatable airbag body is applied to the child's neck when passing over the child's head. The load can be reduced.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a state in which an airbag device according to the present invention installed on an instrument panel of a vehicle such as an automobile is inflated and deployed, and FIG. 2 is a side view of the airbag body of the airbag device according to the present invention. is there.

  1 and 2, reference numeral 11 denotes an airbag device for a passenger seat according to an embodiment of the present invention, which is, for example, a top mount type installed inside the upper surface 3 a of the instrument panel 3. The airbag device 11 includes an airbag main body 12 folded so as to be inflatable and deployable, and an inflator 13 as a gas generation and supply device that supplies an inflation gas to the airbag main body 12.

  The airbag body 12 and the inflator 13 are housed and held in, for example, a case 14 and are installed inside the instrument panel 3 with appropriate hardware.

  The airbag body 12 includes a front panel 12a and a bottom panel 12b adjacent to the lower surface side of the front panel 12a. Of course, the airbag body 12 may be formed by the front panel 12a and the bottom panel 12b, but a side panel may be interposed between the side surfaces of the front panel 12a and the bottom panel 12b.

  The front panel 12a is in contact with the occupant M seated at a normal normal position during inflating and deploying, and directly applies a restraining force so that the occupant M does not move. Further, the bottom panel 12b is configured such that at least the instrument panel 3 and a part of the bottom panel 12b are in contact with each other while the airbag body 12 is inflated and deployed.

Air bag device 11 of the present invention, the bottom panel 12 b, for example, covers a portion except for the contact portion between the instrument panel 3 in the auxiliary panel 12c, during inflation and deployment of the airbag body 12, the auxiliary panel 12c is a bottom The panel 12b is configured to be movable relative to the vehicle in the front-rear direction.

  With such a configuration, for example, in the case of a frontal collision, even if the child seated in the passenger seat S is in an out-of-position state where the child is seated on the instrument panel 3 as shown in FIG. The friction generated when the child passes over the child's head MH can be reduced. Therefore, the load acting on the child's neck can be reduced.

  Needless to say, the airbag apparatus 11 of the present invention has sufficiently improved safety when the airbag body 12 is inflated and deployed as compared with the conventional airbag apparatus. However, if a material having a friction coefficient on the surface of the auxiliary panel 12c that is in contact with the instrument panel 3 is smaller than the friction coefficient of the other panel surfaces 12a and 12b of the airbag body 12, the above-mentioned Friction can be reduced and safety is improved.

  By the way, when the child of the passenger seat S is in the out-of-position state, when the airbag body 12 is inflated and deployed, as shown in FIG. 1, the auxiliary panel is surely placed between the child's head MH and the bottom panel 12b. If 12c is not interposed, the above-described effects cannot be obtained.

  For this purpose, as shown in FIGS. 1 and 2, the auxiliary panel 12c is placed at at least two locations on the front side and the rear side of the vehicle with respect to the unfolding direction (left and right direction in FIG. 1 and FIG. 2). What is necessary is just to fix to the airbag main body 12 by sewing 12d.

  In this way, if the auxiliary panel 12c is fixed to the airbag body 12 at at least two locations on the front side and the rear side of the vehicle, the auxiliary panel 12c does not move stably when the airbag body 12 is inflated and deployed. Without a stable deployment behavior.

  The present invention is not limited to the above example, and it goes without saying that the embodiment may be appropriately changed within the scope of the technical idea described in each claim. For example, the airbag main body 12 constituting the airbag device 11 of the present invention is not limited to one formed of woven fabric, but may be one formed by sewing.

  The airbag device of the present invention is used by being installed on an instrument panel on the passenger seat side of an automobile or the like, but can be provided on a vehicle such as an aircraft or a ship other than a vehicle, and the same effect is exhibited.

It is a side view which shows the state which the airbag apparatus of the example of this invention installed in the instrument panel of a vehicle was inflate-deployed. It is the figure which looked at the airbag main body (state which inflate-deployed) of the airbag apparatus of the example of this invention from the side surface. It is the figure which looked at the airbag main body (state inflated and deployed) of the conventional airbag apparatus from the side.

Explanation of symbols

3 instrument panel M occupant MH head S passenger seat 11 airbag device 12 airbag body 12a positive side panel 12b bottom panel 12c auxiliary panel 13 inflator

Claims (3)

In an emergency, an airbag device for inflating and deploying an airbag body by introducing an inflation gas generated by an inflator,
The airbag main body is in contact with an occupant seated at least in a normal position when inflated and deployed, and directly provides a restraining force to the occupant.
Adjacent to the front panel, and having a bottom panel at least partly in contact with the instrument panel of the vehicle in the middle of inflating and deploying the airbag body,
When the air bag body for pre-Symbol inflated and deployed passes over the head of the child out of position state, can move relative to the longitudinal direction of the vehicle relative to the bottom surface panel, when passing over the head of the child air bag device according to claim Rukoto to have a supplementary panel interposed between the bottom panel.   2. The airbag device according to claim 1, wherein a friction coefficient of at least a surface of the auxiliary panel that is in contact with the instrument panel is smaller than a friction coefficient of another panel surface of the airbag body. . The said auxiliary | assistant panel is being fixed to the said airbag main body at at least two places of the front side and the back side of the said vehicle with respect to the direction at the time of expansion | deployment deployment. Airbag device.

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