JPH04131554U - Vehicle airbag device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the driver's abdomen from hitting the steering wheel during a collision with a vehicle such as a cab-over truck. [Structure] An inflator 16 capable of generating nitrogen gas is attached to the side of the steering column 14 that holds the steering shaft 11 facing the driver's seat 12, and is placed between the abdomen of the driver 25 who operates the wheel 13 and the wheel 13. A deployable airbag 24 is connected to an inflator 16 so as to introduce nitrogen gas into the airbag 24, and a controller 29 controls the inflator based on the detection output of a sensor 28 that detects an impact upon a collision of the vehicle 10.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on an airbag that deploys the driver's kinetic energy generated during a vehicle collision. The present invention relates to an airbag device that absorbs air to reduce injury to a driver caused by a collision. More details The present invention relates to an airbag device suitable for cab-over type vehicles.

0002

[Conventional technology]

This type of airbag device is installed at the top of the steering shaft. An inflator that can generate nitrogen gas is attached to the top of the steering wheel. , an airbag that can be deployed between the upper body of the driver operating the wheel and the wheel. is connected to the inflator to introduce nitrogen gas into the inflator, reducing the impact during a vehicle collision. The controller controls the inflator based on the detection output of the sensor that detects the impact. It is known that the structure is as follows. This device installs an airbag between the driver and the steering wheel in the event of a vehicle collision. When the driver is deployed, the driver can touch the steering wheel, etc. This prevents collisions with parts and reduces injuries to drivers caused by collisions.

0003

[Problem that the idea aims to solve]

However, the above device has a large tilt angle of the steering shaft with respect to the vertical direction. It works effectively on bonnet-type vehicles such as small passenger cars, but if the steering shaft is Cab-over truck installed with the driver's seat slightly tilted from the vertical direction In vehicles such as cars and buses, the air conditioner attached to the top of the steering wheel in the event of a collision Even when the Abag deploys, the driver's abdomen hits the steering wheel. There was fear.

0004 The purpose of this invention is to prevent the driver's abdomen from being exposed during a collision with a vehicle such as a cab-over truck. Vehicle airbag device that can prevent collisions with the steering wheel Our goal is to provide the following.

[0005]

[Means to solve the problem]

The configuration of the present invention to achieve the above object will be explained using FIG. 1 corresponding to the embodiment. I will clarify. The vehicle airbag device of the present invention adjusts the steering angle of the steering wheel 13. Holds the steering shaft 11 that transmits information to the ring gear and the shaft 11 Attached to the steering column 14 and the side of the column 14 facing the driver's seat 12 an inflator 16 that can generate nitrogen gas, and an inflator 16 that can generate nitrogen gas; The abdomen of the driver 25 who is connected to the inflator 16 and operates the wheel 13 and the wheel The airbag 24 that can be deployed between the airbag 13 and the vehicle 10 detects the impact at the time of a collision. A sensor 28 and a computer that controls the inflator 16 based on the detection output of the sensor 28. It is equipped with a troller 29.

[0006]

[Effect]

When the sensor 28 detects the impact when the vehicle 10 collides, the controller 29 The inflator 16 is operated based on the detection output of the sensor 28, and the generated nitrogen gas is removed. The airbag 24 is instantly inflated by the and the steering wheel 13.

[0007]

【Example】

Next, one embodiment of the present invention will be described in detail based on the drawings. As shown in FIGS. 1 to 3, the steering shaft of the cab over truck 10 11 is installed in a slightly inclined state toward the driver's seat 12 from the vertical direction. A steering wheel 13 is attached to the top of the shaft 11. wheel 1 The steering angle of 3 is transmitted to the steering gear (not shown) via the shaft 11. It looks like this. In addition, the shaft 11 is held by a steering column 14. , an inflator 16 is attached to the side of the column 14 facing the driver's seat (see Fig. 2). The inflator 16 is a squirrel inserted into the ignition chamber 17a located approximately in the center of the case 17. The squib 18, the flame transfer agent 19 encasing the tip of the squib, and the ignition chamber 17a formed around the ignition chamber 17a. The gas generating agent 2, which is solid sodium nitride, is housed in the gas generating chamber 17b. 1. A pair of lead wires 18a and 18b are connected to the squib 18, and A first passage 17d is provided in the first side wall 17c that partitions the firebox 17a and the gas generation chamber 17b. is formed. A filter chamber is provided around the gas generation chamber 17b via the second side wall 17e. 17f is formed, and a second passage 17g is formed in this second side wall 17e. Second A filter 22 is installed inside the side wall 17e, and a filter is installed in the filter chamber 17f. 23 is attached. Further, a third passage 17i is formed in the outer wall 17h of the case 17. (Figure 3).

[0008] An airbag 24 is folded into the inflator 16 to guide nitrogen gas inside. The inflator 16 and the airbag 24 enclose the column 14. It is covered by a pad 27 connected to a column cover 26. Airbag 24 is the abdomen of the driver 25 who operates the wheel 13, as shown by the two-dot chain arrow in FIG. and the wheel 13, and the pad 27 is made of urea, which is a soft resin. Made of tan resin. The pad 27 also expands when the airbag 24 is deployed. It cracks easily under tension.

[0009]The sensor 28 that detects the impact caused by the collision of the truck 10 is an acceleration sensor, and in this example, is an electric sensor using a strain gauge. The detection output of this sensor 28 is connected to a control input of a controller 29, and the control output of the controller 29 is connected to a pair of lead wires 18a, 18b of the squib 18 via a drive circuit 31 (FIG. 1). A predetermined value G ₁ is stored in the memory of the controller to be compared with the detection output of the sensor.

[0010]The operation of the vehicle airbag device configured as described above will be explained. When the sensor 28 detects an impact of a predetermined value G1 _or more during a collision of the truck 10, the controller 29 sends a current to the squib 18 based on the detection output of the sensor 28, and the heat transfer agent 19 ignites due to the heat generated by the squib 18. . This heat passes through the first passage 17d and reaches the gas generation chamber 17b as shown by the broken line arrow in FIG. 3, causing the gas generation agent 21 to explode and nitrogen gas to be generated. This nitrogen gas is guided into the airbag 24 through the filter 22, the second passage 17g, the filter 23, and the third passage 17i as shown by the solid line arrow, and the airbag 24 is guided as shown by the two-dot chain line in FIG. It is deployed between the abdomen of the driver 25 and the steering wheel 13. These series of operations are performed instantaneously. As a result, the airbag 24 absorbs the kinetic energy generated in the driver 25 when the truck 10 collides, and it is possible to prevent the abdomen of the driver 25 from hitting the steering wheel 13.

[0011] In addition, in the example, a strain gauge is used as a sensor to detect the impact at the time of a vehicle collision. Although the electrical sensor used was mentioned, this is just an example, and it is not applicable to machines using a spring-mass system. A type sensor may also be used. Also, when these sensors are used in combination, the reliability of the sensors can be improved. You can improve. In addition, although a cab over truck was mentioned in the example, it is not limited to this, and On the other hand, if the vehicle has a small angle of inclination of the steering shaft, the cab-over bus will be used. Or other vehicles may be used.

0012

[Effect of the idea]

As described above, according to the present invention, the steering wheel that holds the steering shaft An inflator that can generate nitrogen gas is installed on the side of the ring column facing the driver's seat. Installed and deployable airbag between the driver's abdomen and the wheel. The inflator is connected to the inflator so as to introduce nitrogen gas into the inflator. The controller controls the inflator based on the detection output of the sensor that detects shock. This allows the driver's abdomen to be protected even if the impact occurs during a collision with a vehicle such as a cab-over truck. This prevents the driver from hitting the steering wheel and protects the driver's abdomen. can be protected.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a cab-over truck including a vehicle airbag device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of section A in FIG. 1;

FIG. 3 is an enlarged sectional view of section B in FIG. 2;

[Explanation of symbols]

10 Cabover truck (vehicle) 11 Steering shaft 12 Driver seat 13 Steering wheel 14 Steering column 16 Inflator 24 Airbag 25 Driver 28 sensor 29 Controller

Claims (1)

[Scope of utility model registration request] [Claim 1] A steering shaft (11) that transmits the steering angle of the steering wheel (13) to the steering gear.
and a steering column (1) that holds the shaft (11).
4), and an inflator (16) that is attached to the side of the column (14) facing the driver's seat (12) and is capable of generating nitrogen gas;
the inflator (16) so as to guide the nitrogen gas inside;
an airbag (2) that can be deployed between the abdomen of a driver (25) who is connected to the wheel (13) and operates the wheel (13);
4) and a sensor (28) that detects the impact when the vehicle (10) collides.
and a controller (29) that controls the inflator (16) based on the detection output of the sensor (28).