KR100622425B1 - Curtain air-bag of automobile - Google Patents

Abstract

Curtain airbag of the vehicle according to the present invention includes an inflator for receiving a collision signal of the vehicle and ejects a high-pressure gas; A cushion in which the high pressure gas ejected from the inflator is inflated and rapidly expanded in a folded state; A fill hose connected to the inflator to be inserted into the cushion such that the gas ejected from the inflator is diffused into the cushion; It is installed in the middle of the fill hose and comprises a vent hole connector for reflowing the flow of the gas flowing in the fill hose to the inner wall side, there is an effect of increasing the amount of gas discharged through the gas port.

Description

Curtain air-bag of vehicle             

1 is a side view showing a curtain airbag module of a vehicle according to the prior art

Figure 2 is an exploded perspective view showing a curtain airbag module of a vehicle according to the prior art

Figure 3 is a side view showing the interior of the vehicle according to the invention, Figure 4 is an exploded perspective view showing a curtain airbag according to the invention

5 is a side view showing the vent hole connector according to the present invention;

6 is a cross-sectional view showing a fill hose according to the present invention

7 is a schematic diagram showing the flow of gas generated in the vent hole connector according to the present invention during overexpansion and underexpansion;

<Explanation of symbols on main parts of the drawings>

10: body 22: inflator

24: fill hose 24a: first hose

24b: 2nd hose 25: gas hole

26: cushion 30: vent hole connector

32: fitting part 34: diffusion part

35: gas hole 36: groove

40 diffuser 42 contact surface

45: clamp 90: bolt

95: clamp

The present invention relates to a vent hole connector of a curtain air bag, and more particularly, to a vent hole connector of a curtain air bag for efficiently supplying air to a cushion even at a low temperature.

In general, a vehicle airbag system is a safety device that mitigates a passenger's impact by cushioning the airbag and prevents the passenger from being knocked out of the vehicle body by inflating the airbag like a balloon in the event of a crash of a certain size or more. Driver Air Bags (DAB) and Passenger Air Bags (PAB) to protect them, and Side Air Bags (SAB) and Curtain Air Bags (CAB) to protect the passenger's side in the event of a side impact.

1 is a side view showing a curtain airbag module of a vehicle according to the prior art, Figure 2 is an exploded perspective view showing a curtain airbag module of the vehicle according to the prior art.

The curtain airbag module of the vehicle according to the prior art includes an airbag cover 1 installed in the transverse direction inside the vehicle, a cushion 2 accommodated in the airbag cover 4 and deployed downward like a curtain, and the cushion 2 Peel hose (3) for guiding the gas to the cushion (2) through a plurality of gas holes (3a) are inserted in the transverse direction) and connected to one end of the fill hose (3) when the And an inflator 4 for ejecting a high pressure gas into the fill hose 3.

The airbag cover 1 is fixed to the vehicle body by one end of the channel 5 and the other end of the inflator 4, the upper side is cut in the longitudinal direction, and the fixing portion 1a in the longitudinal direction is fixed to the vehicle. Is formed.

The cushion 2 is inserted into the airbag cover 1, and a fixing portion 2a formed at an upper end thereof protrudes through the cutout of the airbag cover 1 to overlap the fixing portion 1a. The cushion 2 and the airbag cover 1 are simultaneously fixed to the inside of the vehicle by bolts 6 as fastening means.

The cushion 2 receives a gas of high pressure through the inflator 4 having the gas ejection opening 4a therebetween, and the gas ejected from the inflator 4 is provided between the cushion 2 and the inflator 4. A connecting pipe 7 for guiding the cushion 2 is installed.

And the inflator 4 is fixed to the interior of the vehicle by the clamp 8 is fastened to the bolt (6).

Looking at the operation according to the prior art configured as described above are as follows.

First, when a vehicle is subjected to an accident such as a collision or overturn, an impact sensor (not shown) installed in the vehicle detects the collision or overturn and transmits a signal to an electronic control unit (not shown) of the vehicle, and the curtain airbag module Is activated by a signal transmitted from the electronic control unit.

Thus, when a side collision of the vehicle is detected, the inflator 4, which receives a signal from the electronic control unit, ejects gas to the fill hose 3, and the gas ejected to the fill hose 3 is applied to the fill hose 3. The cushion 2 is filled through the gas port 3a, and the cushion 2 is rapidly deployed between the side of the occupant and the interior side of the vehicle by the supplied gas.

By the way, the gas supplied to the fill hose (3) is supplied to the cushion (2) through the gas hole (3a), but when the operating temperature or operating time of the inflator (4) is changed, the gas hole Since the amount of gas discharged from (3a) is different, there is a problem in that the performance of the vehicle does not exhibit the performance.

The present invention has been made to solve the above problems, an object of the present invention is to provide a curtain airbag of the vehicle that the amount of gas supplied to the cushion is maintained even if the operating environment of the curtain airbag is changed.

Curtain airbag of the vehicle according to the present invention for solving the above technical problem is to receive a collision signal of the vehicle inflator for ejecting high-pressure gas; A cushion in which the high pressure gas ejected from the inflator is inflated and rapidly expanded in a folded state; A fill hose connected to the inflator to be inserted into the cushion such that the gas ejected from the inflator is diffused into the cushion; A vent hole connector installed in the middle of the fill hose and refracting the flow of gas flowing in the fill hose toward the inner wall;
The vent hole connector may include a fitting portion fitted to the first fill hose; A diffusion part disposed between the fitting parts and having an inner space formed in a spherical shape; A gas hole formed through the diffusion part; And diffusion means for refracting the flow direction of the gas introduced through the fitting portion to the inner wall of the diffusion part.

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

Figure 3 is a side view showing the interior of the vehicle according to the invention, Figure 4 is an exploded perspective view showing a curtain airbag according to the invention, Figure 5 is a side view showing a vent hole connector according to the invention, Figure 6 Is a cross-sectional view showing a fill hose according to the present invention, Figure 7 is a schematic diagram showing the flow of gas generated in the vent hole connector according to the present invention during overexpansion and underexpansion.

As shown in Figure 3 or 4, the curtain airbag according to the present invention is installed in the vehicle body 10 of the vehicle, in the event of a collision between the vehicle side of the passenger or driver of the vehicle and the side of the window is installed Developed.

The curtain air bag is an inflator 22 for ejecting a high-pressure gas by receiving a collision signal of the vehicle, and a cushion 26 that is rapidly expanded in the folded state by the high-pressure gas ejected from the inflator 22 and And a fill hose 24 connected to the inflator and inserted into the cushion so that the gas ejected from the inflator 26 is diffused into the cushion, and installed in the middle of the fill hose 24 and the fill hose 24. It is configured to include a vent hole connector 30 to uniformly flow the gas to the cushion 26 or the fill hose 24 after the flow of the gas flowing in the uniform.

The cushion 26 is folded several times in the state in which the fill hose 24 is inserted and inserted into the airbag cover 21. A channel 23 is connected to one end of the airbag cover 21, and the airbag cover ( 21, the channel 23 and the inflator 22 are fixed to the vehicle body 10 by bolts 90 and clamps 95 as fastening means.

Here, the fill hose 24 is configured to be separated into first, second and third hoses 24a and 24b, and the vent hole connector 30 is disposed between the first, second and third hoses 24a and 24b. Is installed.

Here, the fill hose 24 has a gas hole 25 for supplying gas to the cushion 26, and a gas inside the fill hose 24 for discharging the gas to the gas hole 25. A flow path (not shown) is formed.

Meanwhile, as shown in FIG. 5 or 6, the vent hole connector 30 is provided between the fitting portion 32 fitted to the first and second hoses 24a and 24b and the fitting portion 32. The diffusion part 24 which diffuses the gas which flows in convexly formed inner space, the groove | channel 36 formed in the outer periphery of the said fitting part 32, and the gas hole formed through the said diffusion part 34 ( 35).

The fitting portion 32 is fitted inside the first, second and third hoses 24a and 24b, and a ring-shaped clamp 45 is installed at the position of the groove 36 so that the first and the second and third hoses 24a and 24b are fitted. The three hoses 24a and 24b prevent the vent hole connector 30 from being separated.

The diffusion portion 34 has a spherical inner space such that the gas introduced through the fitting portion 32 is diffused.

In addition, a diffusion means for diffusing the gas introduced through the fitting portion 32 into the inner wall of the diffusion portion 34 is formed in the inner space of the vent hole connector 30, and the diffusion means is the insertion portion 32. The diffusion plate 40 is formed orthogonal to the gas flow path formed in the).

Here, one end of the diffusion plate 40 is connected to the inner wall of the vent hole connector 30, and the other end is formed to be orthogonal to the gas flow path of the fitting portion 32.

Thus, the gas introduced through the gas flow path inside the fitting portion 32 strikes the diffusion plate 40 and diffuses into the inner wall 34a of the diffusion portion 34.

In this case, the contact surface 42 of the diffusion plate 40 directly contacting the gas introduced from the fitting portion 32 may be inclined toward the inner wall of the diffusion portion 34.

In addition, the gas holes 35 may be located at the rear portion of the flow passing through the diffusion plate 40 so that the gas diffused by the diffusion plate 40 is more easily introduced.

Hereinafter, an operation process of the vehicle curtain airbag according to the present invention will be described in more detail with reference to FIGS. 4 to 7.

First, the gas ejected from the inflator 22 flows into the first hose 24a.

Here, when the gas ejected from the inflator 22 is ejected in an overexpansion state, the gas passing through the first hose 24a flows through a place where the friction is low. A large amount of gas flows through the center of 24a).

In addition, a large amount of flow is generated in the center of the vent hole connector 30 in the gas introduced into the vent hole connector 30.

In this case, the diffusion plate 40 installed inside the vent hole connector 30 is located at the center of the gas flow flow of the vent hole connector 30, and the gas flowing through the center side is supplied to the diffusion part 34. Is refracted to the inner wall 34a side. (FIG. 7A)

Herein, when the inflator 22 is operated in a condition where the external temperature is high (for example, 50 ° C.), the gas generated in the inflator 22 is faster than when the ejection rate is low depending on the high temperature temperature condition. In this case, only a small amount of the ejected gas is ejected from the gas port 25 formed in the middle of the fill hose 24, and a large amount of gas is ejected only from the gas port 25 formed at the end. Has a tendency to expand.

That is, the ejected gas is formed inside the fill hose 24 and flows through the gas flow path, but tends to flow rapidly through the center rather than the inner wall 34a.

On the other hand, when the inflator 22 is operated in a condition where the external temperature is low (for example, -30 ° C), the gas generated in the inflator 22 exhibits a lower flow rate than the overexpansion. The flow rate of the gas flowing through the inner wall 34a is increased.

At this time, when the gas holes 25 and 35 are formed on the outer wall of the vent hole connector 30 or the first and second hoses 24a and 24b as in the present invention, the flow flow tends to be the same as the underexpansion. It is more efficient for the ejection of gas.

Thus, the gas refracted by the flow direction through the diffusion plate 40 refracts the gas toward the inner wall 34a so that the same flow flow as the underexpansion appears even in the case of overexpansion.

That is, when overexpansion occurs, the flow gas is refracted to the inner wall 34a through the diffusion plate 40 formed in the vent hole connector 30 to generate a flow flow similar to that of the underexpansion.

In addition, as shown in FIG. 7B, the gas flowing through the vent hole connector 30 is further flowed toward the inner wall 34a to eject a larger amount of gas through the gas hole 35 in a low temperature condition. Can be.

As described above, the curtain airbag of the vehicle according to the present invention has an advantage of increasing the amount of gas discharged through the gas hole by installing a vent hole connector on the fill hose and diffusing and refracting the flowing gas to the inner wall.

In addition, the vent hole connector according to the present invention has an advantage of increasing the amount of gas ejected through the gas sphere by installing a diffusion plate so that underflow conditions such as low temperature conditions are generated in the flow of gas even at high temperature conditions. .

Claims (3)

An inflator that receives a collision signal from a vehicle and blows out high pressure gas; A cushion in which the high pressure gas ejected from the inflator is inflated and rapidly expanded in a folded state; A fill hose connected to the inflator to be inserted into the cushion such that the gas ejected from the inflator is diffused into the cushion; A vent hole connector installed in the middle of the fill hose and refracting the flow of gas flowing in the fill hose toward the inner wall; The vent hole connector may include a fitting portion fitted to the first fill hose; A diffusion part disposed between the fitting parts and having a spherical internal space; A gas hole formed through the diffusion part; Curtain airbags, characterized in that the diffusion means for refracting the flow direction of the gas introduced through the fitting portion to the inner wall of the diffusion. The method of claim 1, The diffusion means is a curtain airbag of the vehicle, characterized in that the diffusion plate is installed orthogonal to the flow of the gas. The method of claim 2, The diffusion plate is a curtain airbag of the vehicle, characterized in that the contact surface which is in contact with the gas introduced from the fitting portion is formed inclined toward the inner wall of the diffusion portion, the position closer to the fitting portion than the gas hole.

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