JPH0453322Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to an airbag device.

2. Description of the Related Art As a conventional air bag device, for example, the one shown in FIG. 9 is well known (see Japanese Utility Model Publication No. 3468/1983).

The figure shows the airbag when it is fully deployed. 1 is a bag; 2 is a rim of a steering wheel; an inflator (not shown) that generates combustion gas is integrally attached to the steering wheel. Reference numeral 11 denotes a built-in suspension string that is built into the bag 1 and connects the peripheral portion of the inflator and the inner surface of the bag 1 on the opposite side.

The built-in hanging strap 11 prevents the bug 1 from rushing toward the occupant excessively and hitting the passenger's face when the bug 1 is deployed, and also allows the bug 1 to maintain an elliptical shape when viewed from the side when the bug 1 is fully opened. Even in the event of an oblique collision, the occupant is likely to be restrained by Bag 1.

Note that 9 is a steering column.

Problems to be Solved by the Invention However, in such conventional airbag devices, the hanging cord is built into the bag, so the hanging cord is provided approximately at the center of the bag.

Therefore, in order to be able to securely restrain the occupant and absorb the impact of the occupant even if the occupant pushes the bag 1 upward during a vehicle collision,
There was a problem in that the size of the bug had to be significantly increased.

The present invention was made with the aim of solving such conventional problems.

Means to Solve the Problems For this reason, the present invention uses a suspension string to connect the outer surface near the outermost periphery of the bag as seen from the passenger side and the steering wheel, center pad, etc. when the air bag device is inflated. .

Function: When the bag expands due to a vehicle collision, the hanging string pulls the outer surface of the bag near its outermost periphery as seen from the passenger side toward the steering wheel, thereby suppressing excessive expansion toward the passenger side.

Furthermore, when the passenger collides with the bag and pushes it up, the bag is pulled by the hanging cord, preventing upward movement and securing the passenger's restraint.

Example Hereinafter, the present invention will be explained based on the drawings.

1 and 2 are diagrams showing a first embodiment of the present invention.

Fig. 1 shows the bag 1 when it is fully expanded, where 1 is the bag and 2 is the rim of the steering wheel. 3 is a hanging string that connects the rim 2 and the outside surface near the outermost periphery of the bag when it is fully expanded as seen from the passenger side at several points.

FIG. 2 shows the bag 1 in an unexpanded state, and the bag 1 is folded and stored inside the cover 5. The hanging string 3 is housed in the cover 5 and the rim.

When the bag 1 is supplied with gas by an inflator (see Fig. 8) and deployed, the cover 5 is partially thin so that it can be easily torn by the deployment force of the bag 1, and the rim of the hanging cord is Since the storage in the bag 2 is embedded at a very shallow position in the rim 2 so that it can be easily peeled off and removed when the bag 1 is deployed, the hanging cord performs its function as the bag is deployed.

Next, the action will be explained.

The air bag device according to the present invention has a strong function of maintaining the shape of the bag 1 because it is provided between the outside surface of the bag and the steering wheel, whereas the conventional hanging string is built inside the bag. In other words, when the vehicle crashes, the occupant hits Buzz 1.
Even if the bag is pushed up, the suspension string 3 installed near the outermost periphery of the bag as seen from the passenger side when the bag is deployed prevents the bag from moving upward, minimizing the upward escape of the bag 1. can.

Therefore, since the bag 1 remains between the occupant's chest and the steering wheel until the end, the chest 4 is received softly.

Also, when the bag 1 is deployed, the bag 1 is attached by the hanging string 3.
is pulled, so that the bag 1 does not expand excessively toward the occupant and hit the passenger's face.

FIG. 3 shows a second embodiment.

In this embodiment, the length of the hanging cord 3 connecting the bag 1 and the rim 2 is longer on the side of the bag 1a rim 2a that is closer to the passenger 6, and gradually becomes shorter as it moves away from the passenger.

Since it is pulled from the bag 1 by the hanging cord 3 near the outermost circumference 10 of the bag 1 as seen from the passenger,
Since the volume of the bag 1 on the side far from the passenger can be directed toward the passenger, the thickness A of the bag 1 between the passenger 6 and the rim 2 can be increased without changing the volume of the bag 1.

The chest 4 of the occupant 6 does not bottom out on the rim 2 during a vehicle collision, and the occupant 6 can be restrained more softly until the end.

A third embodiment is shown in FIGS. 4 and 5. In this embodiment, a side 2a of the rim 2 closer to the passenger and a side 1b of the bag 1 farther from the passenger are tied together with a hanging cord 3.

As a result, even if the occupant hits the bag 1 and pushes the bag 1 upward in the event of a vehicle collision, the hanging string 3 is arranged in substantially the same direction as the direction in which the bag 1 is pushed upward, so the hanging string 3 will hold the bag 1 up. It is effectively pulled, and the upward escape of the bag 1 can be minimized.

A fourth embodiment is shown in FIGS. 6 and 7. In this embodiment, an air bag device is attached to the non-rotating center pad portion 7 of the steering wheel.

Figure 6 shows the bag 1 when it is fully expanded, with 1 being the bag and 2 being the rim. 3 connects the circumference of the disc 8 which is attached to the non-rotating center pad part 7 of the steering wheel in parallel with the rim 2 with a hanging string, and the vicinity of the outermost circumference 10 of the bag 1 when it is unfolded as seen from the passenger side. It's tied.

FIG. 7 shows the bag 1 in an unexpanded state, and the bag is folded and stored in the center pad 7. The hanging cord 3 is housed in a center pad 7 and a disc 8.

When Bag 1 is inflated by supplying gas from the inflator 12 stored in the non-rotating center pad 7 shown in Fig. 8 in the event of a vehicle collision, the cover 20 of the center pad is torn so that Bag 1 can easily come out. It's summery. The suspension string 3 is also embedded in a very shallow part of the disk 8 so that it can be easily peeled off and come out from the disk 8. Therefore, the suspension string 3 functions simultaneously with the expansion of the bag 1.

A disk 8 is attached to the non-rotating center pad 7, which fixes the air bag device and the sling 3.

Therefore, no matter what angle the steering wheel is turned, the bag 1 does not rotate and when deployed, it is always deployed to a position where the thickness between the passenger and the rim 2 is large, as shown in FIG. Furthermore, even if the passenger hits the bag 1 and pushes it up, the direction of the bag 1 remains unchanged, so that the suspension string 3 can function to the maximum and minimize the bag's escape. Therefore, the bag 1 allows the chest to be held softly until the end.

FIG. 8 illustrates the state in which the air bag device is attached to the non-rotating center pad 7.

The lower internal gear 13 is integrated with a combination switch 14 and has a jacket tube 15.
It is fixed at The pinion gear 17 is attached to the spokes 16 of the steering wheel and rotates together with the wheel. Further, the wheel is fixed to the steering shaft 18.

An air bag module consisting of a center pad part 7, an inflator 12 built therein, a folded bag 1, etc., and a disk 8 are fixed to an upper internal gear 19 which does not rotate together with the steering wheel.

When the steering wheel is rotated, the steering shaft 18 is rotated. At the same time, the pinion gear 17 integrated with the wheel attempts to revolve together with the lower internal gear 13 and upper internal gear 19. However, since the lower internal gear 13 is fixed to the jacket tube 15, the pinion gear 17 rotates on its own axis and revolves around the lower internal gear 13. Since the pinion gear 17 rotates on its axis, the upper internal gear 19 revolves around its axis. As a result, the center pad 7 and therefore the air bag device do not rotate.

Effects of the invention According to the invention, a plurality of hanging cords are arranged between the steering wheel and the outside surface near the outermost periphery of the bag as seen from the passenger side when the bag is inflated, so that when the vehicle crashes, the passenger hits the bag and pushes it up. Since the bag is pulled by a hanging cord, it is possible to prevent the bag from moving upward and effectively restrain the occupant's chest.

Furthermore, since the bag is pulled by the hanging cord when the bag is deployed, the bag does not expand excessively toward the passenger and prevent it from hitting the passenger's face or the like.

[Brief explanation of the drawing]

Figures 1 and 2 show the first embodiment of the present invention; Figure 1 is a side view of the bag when it is unfolded;
The figure is a plan view when the bag is not expanded, FIG. 3 is a side view when the bag is expanded, showing the second embodiment of the present invention, and FIGS. 4 and 5 are the third embodiment of the present invention. Figure 4 is a side view of the bag when it is deployed, Figure 5 is a plan view of the bag when it is not deployed, Figures 6 to 8 show the fourth embodiment of the present invention, and Figure 6 is a side view of the bag when it is deployed. figure,
FIG. 7 is a plan view of the non-deployed state, FIG. 8 is a cross-sectional view showing the state of storage in the non-rotating center pad, and FIG. 9 is a side view of a conventional example. 1... Batsugu, 1a... The side closer to the Batsugu occupant, 1b... The side farther from the Batsugu occupant, 2...
Rim of steering wheel, 2a...Side of rim near passenger, 3...Hanging string, 4...Chest, 5...
Cover, 6...Crew, 7...Non-rotating center pad, 8...Disc, 9...Steering column, 1
0...The outermost circumference when the bug is deployed as seen from the passenger side, 11
... Built-in hanging string, 12 ... Inflator, A ...
Distance between occupant and steering wheel rim.

Claims (1)

[Claims for Utility Model Registration] In an air bag device that expands to restrain an occupant during a vehicle collision, there is provided a plurality of suspension strings between the outer surface near the outermost periphery of the bag and the steering wheel, as viewed from the passenger side when the bag is inflated. An airbag device characterized by being equipped with.