KR100271254B1 - Airbag module of passenger airbag - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag module of a passenger airbag, and includes a diffuser 18 to disperse gas generated in the inflator 24 into the cushion 14, and at one end thereof, a first flow prevention device 22. In the airbag module of the passenger airbag consisting of a housing 10 in which the first holder 16 is seated, the fastener having a locking end 42 inward or downward A housing 10 having a symmetry 40; A diffuser 33 having a guider groove 36 fixed to the locking end 42 to be symmetrical on both sides, and having a plurality of vent holes 34 and 34a and a long hole 32 connecting the guide grooves 36 to the upper side thereof. The second holder 30 is integrally formed to prevent deformation of a part of the second holder 30 when gas is generated, and also prevents the cushion from being eccentrically developed to safely restrain the passenger.

Description

Airbag module of passenger airbag

The present invention relates to an airbag module (A / B module) of a passenger airbag, and more particularly, to prevent a part of the holder from being deformed by the pressure of the gas generated during ignition of the inflator, thereby preventing eccentric development. An airbag module of a passenger airbag that is securely restrained.

In general, the vehicle is equipped with an airbag system to protect the driver and passengers in the event of a collision or collision, and if the vehicle collides with the front or side while driving at a certain speed, the cushion is inflated according to the operation of the airbag system. Minimizes human injury by preventing passengers from hitting the body directly.

There is a driver airbag mounted on the steering wheel of such an airbag system to protect the driver and a passenger airbag to protect the passenger in the passenger seat. Passenger airbags are installed inside the instrument panel and are divided into row, middle and top types according to their height. The row type is installed in the lower part of the instrument panel, the middle type is installed in the middle, and the top type is installed and deployed on the upper part of the front of the passenger, thereby restraining the passenger.

The schematic configuration of such an airbag includes a gas generator that emits gas according to a signal transmitted from an electronic control unit (ECU), a housing at which a gas generator is fixed at a lower part thereof, and a housing at which an upper part is mounted, and a gas discharged from the gas generator. It is made of a cushion that is built in a folded state in the housing so that it can be expanded by.

1 to 3 are a perspective view and a plan view showing a state in which a general passenger airbag is installed and the structure of the airbag module. Referring to the state in which the passenger airbag is installed, the airbag device may be formed of a hood 2 forming an engine room. It consists of a cushion 14 incorporating an airbag module 12 installed between the dash panel 4 and the instrument panel 6 fixed to the end and the cross member. The front glass 8 fixed to the filler which is not shown in the upper both sides of the instrument panel 6 is provided.

Here, the airbag module 12 has a first holder having a diffuser 18 having a built-in inflator 24 in the inner center thereof, and controlling the discharge of the gas generated from the inflator 24 into the cushion 14. 16 is housed in the housing 10.

The inflator 24 has a built-in detonator (not shown) for electrically reacting to the electronic control unit (ECU), and a radial gas discharge hole 26 is formed in a position opposite to the detonator. As shown in FIG. 3, the diffuser 18 is configured to discharge the gas generated from the inflator 24 into the cushion 14 in a constant manner, and both sides thereof are wide and the center connecting them is formed to have a narrow width. have. That is, both sides are provided with the 1st and 2nd expansion parts 18b and 18c which have a triangular form, and the connection part which has predetermined width L in the axial direction in the center of this 1st and 2nd expansion parts 18b and 18c. 18a is integrally formed. In addition, the center of the first flow preventing tool 22 is in close contact with the outer surface of the first holder 16 and is fixed with a rivet 23 or the like.

Both sides of the first holder 16 are formed such that the guide grooves 20 are symmetrical, and the first flow preventing holes 22 are fixed to the guide grooves 20 to maintain balance.

When the impact force is generated while driving such a passenger airbag, a signal is applied from the electronic control unit (ECU) to the detonator of the inflator 24 and gas is generated at the same time. The gas is discharged through the radial gas discharge hole 26 and then discharged into the cushion 14 through the first expansion portion 18b of the first holder 16 provided at the outside thereof.

At this time, the cushion 14 is inflated while being moved toward the second expansion portion 18c through the connection portion 18a connected to the first expansion portion 18b to safely restrain the passenger.

However, due to the high pressure and blowing rate of the gas generated from the inflator during ignition, both sides of the first tip surrounding the inflator are deformed to locally increase the pressure in the cushion, thereby eccentrically expanding and restraining the passenger safely. There is a problem that the damage is aggravated. In addition, the holder inserted into the housing is expected to have a problem that the flow is generated inside the housing due to the vibration, etc. generated during the driving and causing noise.

Therefore, the present invention has been made to solve the above problems, and surrounds the outside of the inflator, to form a plurality of vents to be symmetrical to discharge the generated gas into the inside of the cushion efficiently, to form a long hole in the middle Accordingly, an object of the present invention is to provide a gas generator for a passenger airbag that can maintain a constant pressure of the ejected gas to prevent unstable deformation of a part of the housing and to prevent noise from being generated while driving. .

1 is a cross-sectional view schematically showing the installation state of a typical passenger airbag,

2 is a perspective view of an installed airbag module of a typical passenger airbag;

3 is a plan view of an airbag module used in a typical passenger airbag,

4 is an exploded perspective view of an installed airbag module of a passenger airbag according to the present invention;

5 is a plan view of an airbag module used in a passenger airbag according to the present invention;

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a plan view of another embodiment according to the present invention.

* Description of the symbols for the main parts of the drawings *

10; housing 16; first holder

30; second holder 32; long hole

33; diffuser 34, 34a; ventilator

36; guider groove 39; development control unit 40; fixture 42; locking end

The present invention for achieving the above object is provided with a first holder having a diffuser to disperse the gas generated in the inflator into the cushion, the first flow stopper is fixed at one end thereof, the first holder is seated An airbag module of a passenger airbag consisting of a housing, comprising: a housing having a fastener having a locking end to an inner lower side thereof to be symmetrical; Guiding grooves fixed to the locking end are formed to be symmetrical on both sides, and a second holder formed integrally with a diffuser having a plurality of aeration holes and a long hole connecting them to the upper portion of the airbag for passenger airbags, characterized in that Is achieved by providing a module.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 4 is an exploded perspective view of the installed airbag module of the passenger airbag according to the present invention, Figure 5 is a plan view of the airbag module used in the passenger airbag according to the present invention, Figure 6 is a cross-sectional view taken along line A-A of FIG.

First, the present embodiment will be described in connection with the prior art, as shown in Figures 1 to 3, the airbag module 12 installed inside the cushion 14 is in the inflator 24 built in the center A first holder 16 having a diffuser 18 formed therein for efficiently discharging the generated gas into the cushion 14 is installed in the housing 10, and the diffuser 18 has triangular first and second expansions on both sides thereof. It consists of connecting portions 18a having ends 18b and 18c and having a predetermined width.

In such a passenger airbag, an impact force is generated and a signal is applied from the electronic control unit (ECU) to the detonator installed in the inflator to generate gas. The gas is blown out through the first expansion portion 18b, the connection portion 18a, and the second expansion portion 18c formed outside the first holder 16, thereby inflating the cushion to restrain the passenger.

As such, the gas generated from the inflator due to the ignition of the detonator is instantaneously ejected into the cushion through the first expansion portion 18b, and a part of the gas flows into the second expansion portion 18c through the connection portion 18a. In order to prevent the connection part 18a connected to the first expansion part from being damaged by the pressure, and to prevent the noise generated by the vibration during the driving, a fixture (inside the housing 10) 40) was installed so that the second holder 30 is fixed.

4 to 6, the fastener 40 installed inside the housing 10 is provided so that the locking end 42 faces the front or the bottom of the second holder ( When inserting 30, the lower part of the housing 10 is fixed at the moment it touches.

The housing 10 is preferably composed of magnesium and an alloy containing the same to reduce the weight.

Here, the second holder 30 is formed in a cylindrical shape having a predetermined diameter and width, and is formed to be symmetrical to the guider groove 36 into which the locking end 42 is inserted, on both sides thereof. The diffuser 33 is integrally provided at the upper middle part in the vertical direction on both sides of the symmetry line.

The diffuser 33 is provided with a plurality of vent holes 34 and 34a on both sides, and a long hole 32 is formed between the vent holes 34 and 34a so that gas can smoothly flow into the cushion.

It is preferable that the second holder 30 is made of an aluminum material in order to reduce the weight. The inflator 24 inserted into the second holder 30 is preferably provided to discharge the gas to both sides so that the gas is ejected from both sides at the same time, one side to adjust the degree of inflating the cushion in accordance with the impact amount Both sides can be used for next-generation ignition-controlled airbag systems (Smart air bags).

Meanwhile, a plurality of curved portions 38 are provided on both sides of the long hole 32 formed at the center of the second holder 30 so as to be symmetrical or asymmetrical to smoothly flow the gas to the cushion 14 according to the ejection pressure of the ejected gas. It is to be introduced, it is preferable to extend the deployment control unit 39 on both sides of the curved portion 38 to induce a safe deformation according to the gas pressure of each part.

In addition, the second holder 30 is preferably fixed to the housing 10 by the locking end 42 and the guider groove 36, but is configured to be configured without any contact configuration with the inflator 24.

The airbag device having such a configuration inserts and fixes the inflator 24 in the center of the second holder 30 in which the diffuser 33 is formed, and then the diffuser 33 formed in the second holder 30 faces upward. The work is completed by installing the electronic control unit (ECU) electrically connected to the detonation part not shown in the figure after being seated inside the cushion.

While driving, collision and collision occur, the signal is applied from the electronic control unit (ECU) to the detonator, and gas is generated. At the same time, the gas is provided with aeration holes 34 and 34a and a long hole 32 formed in the upper part of the second holder 30. By discharging to the inside of the cushion, it is inflated to restrain the passenger.

As a result, the deformation of the vent holes 34 and 34a and the long hole 32 of the second holder 30 is prevented from occurring so that the discharge of the gas is stabilized and the cushion is inflated correctly to safely restrain the passenger.

As described above, the present invention is integrally formed with a plurality of ventilation holes and long holes on the upper surface of the holder, so that the gas is ejected smoothly into the cushion, and at both sides of the holder inserted into the housing Since the fastener is fixed to it, there is an advantage that the flow is prevented from being generated from side to side by vibration generated during driving.

Claims (6)

In the airbag module of a passenger airbag having a diffuser 18 such that gas generated in the inflator 24 is dispersed into the cushion 14, A housing (10) having a fastener (40) having a locking end (42) inwardly or downwardly symmetrically; A diffuser 33 having a guider groove 36 fixed to the locking end 42 to be symmetrical on both sides, and having a plurality of vent holes 34 and 34a and a long hole 32 connecting the guide grooves 36 to the upper side thereof. Airbag module of a passenger airbag, characterized in that consisting of a second holder (30) formed integrally. The method of claim 1, The second holder 30 is an airbag module of a passenger airbag, characterized in that made of aluminum and alloys. The method of claim 1, The diffuser (33) is an airbag module of a passenger airbag, characterized in that the curved portion 38 is made of either symmetrical or asymmetrical so that the cross-sectional area on both sides of the vent holes (34, 34a). The method of claim 3, wherein Air bag module of a passenger air bag, characterized in that by forming the expansion control unit 39 on both sides of the curved portion 38 of the diffuser 33, it is possible to induce a stable deformation according to the gas pressure of each part. The method of claim 1, The second holder 30 is fixed to the housing 10 by the locking end 42 and the guider groove 36, and the airbag of the passenger airbag, characterized in that it is made without any contact configuration with the inflator 24 Module. The method of claim 1, The diffuser (33) is an airbag module of a passenger airbag, characterized in that formed on the upper center portion in the vertical direction on both symmetry lines of the guider groove (36) provided in the second holder (30).