KR101154266B1

KR101154266B1 - External air bag device for a vehicle

Info

Publication number: KR101154266B1
Application number: KR1020100117960A
Authority: KR
Inventors: 방준호
Original assignee: 현대자동차주식회사
Priority date: 2010-11-25
Filing date: 2010-11-25
Publication date: 2012-06-13
Also published as: KR20120056431A

Abstract

The present invention relates to a vehicle external airbag device, the inflator 41 is installed in close contact with the rear space corresponding to the free space of the back beam 12, a sufficient margin secured between the front of the back beam 12 and the bumper cover (14). As the airbag cushion 42 is installed in a space, interference between the bumper cover 14 and the airbag cushion 42 can be prevented, thereby improving durability of the airbag cushion 42, and corresponding to a rigid body in case of a pedestrian accident. As the contact with the inflator 41 can be avoided, a large injury of the pedestrian can be prevented, and as the absorber 13 can be installed together with the airbag cushion 42, the shock absorbing performance can be further improved. As the airbag gas generated from the inflator 41 is delivered to the airbag cushion 42 through the back beam 12, cost reduction and weight reduction can be achieved.

Description

External air bag device for a vehicle

The present invention relates to a vehicle exterior airbag, and more particularly, to a vehicle exterior airbag installed in the front bumper of the vehicle.

In general, a front bumper is provided at the front of the vehicle to absorb the collision energy applied to the vehicle body in the event of a collision or collision and to promote the safety of the occupants.

The front bumper 10 is coupled to the front surface of the bumper stay 11 coupled to the vehicle body, the back beam 12 coupled to the bumper stay 11, and the back beam 12 as shown in FIG. The absorber 13 absorbs the collision energy, and the bumper cover 14 is coupled to the vehicle body in a form surrounding the absorber 13 and exposed to the outside.

However, since only the front bumper 10 does not sufficiently absorb the collision energy, most of the collision energy is transferred to the vehicle body, causing serious damage to the vehicle parts, and in severe cases, injuries to the occupants have been disadvantageous.

In order to reduce any of the above disadvantages, the external airbag device was installed in the front bumper 10. The external airbag device 20 mounts the inflator 21 inside the airbag cushion 22 as shown in FIG. In addition, the inflator 21 and the airbag cushion 22 are fixed to the front of the back beam 12 by the module coupled to the configuration is installed to be wrapped in a bumper cover (14).

However, in the conventional external airbag device 20 installed as described above, both the inflator 21 and the airbag cushion 22 are installed between the back beam 12 and the bumper cover 14 having a narrow space. There was a problem that the airbag cushion 22 is damaged by the interference between the bumper cover 14 and the airbag cushion 22, and there is no space between the bumper cover 14 and the airbag cushion 22, so that the absorber There was a disadvantage that the installation of (13) was impossible.

3 shows an external airbag device 30 having an installation structure of another embodiment, in which the inflator 21 is fixed at a position other than the front surface of the backbeam 12, and the airbag cushion 22 is backbeamed. It is fixed to the front surface of (12), the inflator 21 and the airbag cushion 22 is configured to connect the pipe 23.

The installation structure may prevent the interference between the bumper cover 14 and the airbag cushion 22. However, since the inflator 21 is installed at a position other than the front surface of the back beam 12, the inflator ( 21) there is a new disadvantage that the interference between the peripheral parts, and also difficult to route the pipe 23 for delivering the airbag gas has a disadvantage of low design freedom, and also the bumper cover 14 and the airbag cushion There was no space between (22) and there was a disadvantage in that the absorber 13 could not be installed.

Accordingly, the present invention has been made to solve all the above disadvantages, it is possible to prevent the interference between the bumper cover and the airbag cushion, to prevent the interference between the inflator and the surrounding components, and also to prevent the airbag gas Cost saving and weight reduction can be achieved by not using a separate pipe to transmit, and further, by providing a structure that allows the installation of an absorber, the vehicle provides an external airbag device that can further improve shock absorption performance. Has its purpose.

According to an aspect of the present invention, there is provided an exterior airbag device for a vehicle including: an inflator fixed to a rear surface of a back beam; An air bag cushion fixed to the front of the back beam; And a gas moving hole provided in the back beam to deliver the air bag gas generated in the inflator to the air bag cushion.

Here, the inflator is installed to be in close contact with the back of the back beam when the inflator housing is coupled to the back beam in a state wrapped in the inflator housing; A cushion retainer is inserted between the front surface of the back beam and the air bag cushion; Preferably, the air bag cushion and the cushion retainer are coupled together when the inflator housing is coupled to the back beam.

A plurality of gas inflow holes formed through the rear surface of the back beam to be connected to the inner space of the back beam; It is composed of a plurality of gas discharge holes formed through the front surface of the back beam to be connected to the inner space of the back beam.

In addition, the back beam may be formed in a box structure in which all remaining portions except the gas moving hole are sealed.

The exterior airbag device for a vehicle according to the present invention has the bumper cover and the airbag as the inflator is installed in close contact with the rear surface corresponding to the free space of the back beam, and the air bag cushion is installed in a sufficient free space secured between the front and the bumper cover of the back beam. By preventing interference with the cushion, it is possible to improve the durability of the airbag cushion, and to avoid contact with the inflator corresponding to a rigid body during a pedestrian accident, thereby preventing a large injury of the pedestrian, and together with the airbag cushion As the absorber can be installed, the shock absorbing performance can be further improved, and the airbag gas generated in the inflator is transferred to the airbag cushion through the back beam, thereby reducing the cost and reducing the weight.

1 is an exploded perspective view of a vehicle front bumper;
2 is a view for explaining an external airbag apparatus according to a conventional embodiment;
3 is a view for explaining an external airbag device according to another conventional embodiment;
4 and 5 are a perspective view and an exploded perspective view of the combined state of the external airbag device according to the present invention,
6 is a cross-sectional view of FIG. 4.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, the external airbag device 40 installed in the front bumper 10 of the vehicle is fixed to the rear of the back beam 12 constituting the front bumper 10 as shown in FIGS. 4 to 6. (41), the airbag cushion 42 fixed to the front surface of the back beam 12, and the back beam 12 to deliver the air bag gas generated in the inflator 41 to the air bag cushion 42 It is a configuration including a gas movement hole.

Here, the inflator 41 is wrapped in the inflator housing 43 when the upper and lower ends of the inflator housing 43 are coupled to and installed by a plurality of bolts 51 on the upper and lower surfaces of the back beam 12. It is installed to be in close contact with the back beam 12.

And, the cushion retainer 44 is inserted between the front surface of the back beam 12 and the air bag cushion 42, the upper and lower ends of the air bag cushion 42 and the upper and lower ends of the cushion retainer 44 are the inflator When the upper and lower ends of the housing 43 are coupled to and installed by the plurality of bolts 51 on the upper and lower surfaces of the back beam 12, the housing 43 has a structure in which the bolts 51 are coupled together.

On the other hand, the gas movement hole is a plurality of gas inlet hole 12b formed through the rear surface of the back beam 12 so as to be connected to the inner space 12a of the back beam 12, and the inner space of the back beam 12 A plurality of gas discharge holes 12c formed through the front surface of the back beam 12 so as to be connected to the 12a.

In addition, the back beam 12 is preferably formed in a box structure in which all the remaining portions except the gas inlet 12b and the gas outlet 12c are sealed in order to smoothly deliver the airbag gas.

That is, the back beam 12 is preferably a box structure having an empty inside and a closed structure at both ends.

In the case of the external airbag device 40 configured as described above, the airbag gas generated due to the explosion of the inflator 41 flows into the internal space 12a through the gas inlet hole 12b formed in the rear surface of the back beam 12, and then the front surface thereof. It is injected into the airbag cushion 42 through the gas discharge hole 12c formed in the airbag cushion 42 is projected out of the bumper cover 14 by the pressure of the airbag gas injected through the gas discharge hole 12c. Bar is absorbed by the deployed air bag cushion 42 to minimize the transmission of impact force toward the vehicle body.

External airbag device 40 according to an embodiment of the present invention is installed between the front and bumper cover 14 of the back beam 12 as the inflator 41 is installed in close contact with the rear space corresponding to the free space of the back beam 12. Sufficient space can be secured.

Therefore, only the airbag cushion 42 may be installed in a sufficient clearance space secured between the front surface of the back beam 12 and the bumper cover 14, thereby preventing interference between the bumper cover 14 and the airbag cushion 42. It can be prevented to improve the durability of the air bag cushion 42.

In addition, since the inflator 41 is installed in close contact with the rear surface corresponding to the free space of the back beam 12, it is possible to prevent the interference between the inflator 41 and the surrounding components, and in particular, the inflator corresponding to a rigid body during a pedestrian accident. As contact with (41) can be avoided, it is possible to prevent serious injuries of pedestrians.

In addition, since only the airbag cushion 42 is installed in the free space secured between the front surface of the back beam 12 and the bumper cover 14, the free space can be secured even after the air bag cushion 42 is installed. As the absorber 13 can be installed in the chamber, the shock absorbing performance can be further improved.

In addition, since the airbag gas generated in the inflator 41 is transmitted to the airbag cushion 42 through the gas inlet hole 12b and the inner space 12a and the gas outlet hole 12c of the back beam 12. It is not necessary to use a separate pipe for delivering the airbag gas as in the related art, and thus it is possible to reduce the cost and reduce the weight.

12-Backbeam 12a-Interior
12b-Gas Inlet Hole 12c-Gas Outlet Hole
40-External Airbag Unit 41-Inflator
42-Airbag cushion 43-Inflator housing
44-Cushion Retainer

Claims

An inflator fixedly installed at the rear of the back beam;
An air bag cushion fixed to the front of the back beam;
Gas movement holes provided in the back beam to deliver the air bag gas generated in the inflator to the air bag cushion
External airbag device for a vehicle comprising a.

The method according to claim 1, wherein the inflator is installed so as to be in close contact with the back beam of the back beam when the inflator housing is installed coupled to the back beam in a state wrapped in the inflator housing
External airbag device for a vehicle, characterized in that.

The method of claim 2, wherein the cushion retainer is inserted between the front surface of the back beam and the air bag cushion;
The airbag cushion and the cushion retainer are coupled together when the inflator housing is coupled to the back beam.
External airbag device for a vehicle, characterized in that.

The method of claim 1, wherein the gas movement hole
A plurality of gas inlet holes formed through the rear surface of the back beam to be connected to the inner space of the back beam;
A plurality of gas discharge holes formed through the front surface of the back beam to be connected to the inner space of the back beam;
External airbag device for a vehicle, characterized in that consisting of.

The exterior airbag device for a vehicle according to claim 1 or 4, wherein the back beam is formed in a box structure in which all parts of the back beam except for the gas moving hole are sealed.