KR100633138B1 - Air-bag door in car - Google Patents

Abstract

An air bag door for an automobile is provided to increase operation reliability and stability of products by preventing separation of the air bag door. An air bag door for an automobile includes a core member(35), a support member(45), an air bag door(30), and a reinforcement member(40). The core member is installed at a lower side of a skin member to form a mounting part. The support member is coupled with the mounting part of the core member and has a hollow part formed therein. The air bag door is accommodated in the hollow part of the support member. The reinforcement member is fixed to the support member at its one end and formed of a metal material.

Description

Air-bag door in car

1 is a side sectional view showing a state in which a passenger seat airbag is installed in the related art.

Figure 2 is a side cross-sectional view showing a state in which the vehicle airbag door according to the embodiment of the present invention is installed.

3 is a view showing a state in which the airbag door shown in FIG. 2 is deployed.

Figure 4 is a perspective view showing a state in which a vehicle airbag door according to the embodiment of the present invention is installed.

5 is a perspective view showing a state in which a vehicle airbag door according to another embodiment of the present invention is installed.

Figure 6 is a perspective view showing a state in which a vehicle airbag door according to another embodiment of the present invention is installed.

<Description of Symbols for Main Parts of Drawings>

20 airbag assembly 22 inflator

24: airbag cushion 26: mounting portion

30 airbag door 35 core member

40: reinforcing member 42: support

43: inner mounting portion 44: outer mounting portion

45: support member 50: buffer member

55: skin member 60: fastening member

70: groove

The present invention relates to an airbag door for a vehicle, and more particularly, a metal reinforcing member is overmolded on an airbag door made of plastic material, thereby preventing a breakage of the hinge and tearing of the airbag cushion due to the deployment of the airbag door. It relates to a vehicle airbag door that reduces the risk of.

In general, the vehicle is equipped with a variety of devices for the safety of the occupant, the steering wheel (steering wheel) is equipped with an air bag (air bag) to prevent the driver from being severely impacted in the event of an accident.

Recently, in addition to the driver, passengers are also protected by airbags, and a widely adopted passenger air bag is used to protect passengers sitting in the passenger seat.

The passenger seat airbag as described above is installed inside the instrument panel in front of the passenger seat.

FIG. 1 shows a conventional passenger seat airbag installed. Referring to the drawings, a skin 1, which is a surface material, is positioned on the outside of the instrument panel, and a foaming agent is filled inside the skin 1 to cushion the member. (3) is formed.

Below the shock absorbing member 3, a core layer 5 in which a portion for distributing an air bag is cut is located.

The cutout portion of the core layer 5 is provided with an airbag door 7 for forward deployment when the airbag is operated, and the airbag door 7 is fastened to the core layer 5 with a screw 9.

In addition, a fracture groove is formed in a portion to be broken when the airbag door 7 is deployed.

In addition, an air bag assembly 11 is mounted to the rear of the air bag door 7, and the air bag assembly 11 has an inflator 13 generating gas and an air bag cushion 15 filled with gas and inflated. Are distinguished.

The deployment structure of the conventional airbag door having the configuration as described above will be described.

The inflator 13 installed below the airbag door 7 is operated by an external signal when the vehicle is impacted, thereby injecting gas into the airbag cushion 15.

The airbag cushion 15 pushes the airbag door 7 upward while being rapidly charged by gas, and the airbag door 7 is broken about the fracture groove so that the cushioning member 3 and the skin 1 Incision and open to the front.

When the airbag door 7 is opened forward while rotating about the hinge portion, the airbag cushion 15 is also deployed toward the occupant to prevent the occupant from hitting the vehicle body.

However, when the airbag door 7 is made of plastic, the airbag cushion 15 is hinged due to relatively weak rigidity of the hinge portion to be bent in the operation in which the airbag door 7 is deployed forward while the airbag cushion 15 is deployed. The buoy is broken so that the airbag door 7 flies at high speed toward the occupant, which threatens the safety of the occupant.

When the airbag door 7 is made of steel, the corner portion or the hinge portion of the airbag door 7 is damaged to have a sharp fracture surface, and the sharp fracture surface as described above causes the airbag cushion 15 to be broken. The tearing may cause an accident in which the airbag cushion 15 is not properly deployed toward the occupant.

An object of the present invention for solving the above-mentioned conventional problems is that the airbag door is blown toward the occupant by the breakage of the hinge when the airbag door is made of plastic, so that a safety accident occurs, and the airbag door Is to provide a vehicle airbag door to solve the problem of tearing the airbag cushion because the hinge is sharply bent or the edge of the airbag door is sharply broken when the steel (steel) material.

The present invention for achieving the above object is provided on the lower side of the skin member constituting the interior surface portion of the vehicle, the core member is formed by cutting the portion for deploying the air bag to form a mounting portion; A support member coupled to the mounting portion of the core member and having a hollow formed therein; Located in the hollow of the support member, the airbag door made of plastic material to be deployed to the outside when the airbag deployment; It is configured to include a reinforcing member of a metal material, one end is fixed to the support member in the state overmolded on the airbag door.

Preferably, the support member and the reinforcing member are formed of a steel material.

In addition, the shape of the reinforcing member overmolded on the airbag door has a 'c' shape in which one side is opened toward the hinge portion of the airbag door.

The reinforcing member may be overmolded with a front surface over the airbag door, or overmolded with a portion exposed to the airbag door.

One end of the reinforcing member is fixed by the fastening member in the overmolded state to the airbag door or by the fastening member in the non-overmolding state.

According to the present invention as described above, a plastic reinforcing member is overmolded in the airbag door of the plastic material, to solve the hinge breakage and tearing of the airbag cushion due to the deployment of the airbag door to reduce the risk of safety accident It will provide an airbag door.

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

1 is a side cross-sectional view showing a state in which a passenger seat airbag is installed in the prior art, FIG. 2 is a side cross-sectional view showing a state in which a vehicle airbag door is installed according to an exemplary embodiment of the present invention, and FIG. 3 is an airbag door shown in FIG. 4 is a perspective view illustrating a state in which a vehicle airbag door is installed in accordance with an embodiment of the present invention, and FIG. 5 is a perspective view illustrating a state in which a vehicle airbag door is installed in accordance with another embodiment of the present invention. 6 is a perspective view illustrating a state in which a vehicle airbag door according to another embodiment of the present invention is installed.

As shown in FIGS. 2 to 4, the airbag assembly 20 which is operated in a vehicle accident or when a strong shock is applied is inflated by the inflator 22 generating gas and the gas generated in the inflator 22. Consisting of an airbag cushion 24.

A plastic core member 35 is positioned above the airbag assembly 20, and a portion for disposing the airbag is cut in the core member 35 to form a hollow mounting portion 26 in a rectangular shape.

The support member 45 coupled to the outside of the mounting portion 26 of the core member 35 and having a hollow formed therein is made of a metal material.

The hollow of the support member 45 is provided with an airbag door 30 made of plastic for deployment outward when the airbag assembly 20 operates.

The airbag door 30 is over-molded with a metal reinforcing member 40 inside.

Preferably, the shape of the reinforcing member 40 overmolded on the airbag door 30 is a 'c' shape in which one side is opened toward the hinge portion of the airbag door 30, and the reinforcing member 40 is formed. First, the airbag door 30 made of plastic is formed on the reinforcing member 40 by an overmolding method.

The shape of the reinforcing member 40 is the letter 'c', the outer edge portion of the airbag door 30 that takes a relatively heavy load to reduce the material cost and weight while reinforcing the rigidity of the airbag door 30 as much as possible. To reinforce this.

The support part 42 of the reinforcing member 40 is overmolded while being inserted into the airbag door 30, and the outer mounting part 44 coupled to the core member 35 by the fastening member 60. The airbag door 30 is located above the support member 45 without being overmolded.

As shown in FIG. 2, the outer mounting portion 44 of the reinforcing member 40, the support member 45, one end of the airbag door 30, and the core member 35 are sequentially placed from the upper side, and the fastening member ( 60 is fastened to the lower core member (35).

The upper side of the airbag door 30 and the core member 35 is filled with a foaming agent for cushioning the impact to form a buffer member (50).

On the upper side of the shock absorbing member 50 is provided a skin member 55 constituting the interior surface portion of the vehicle.

Preferably, the support member 45 and the reinforcing member 40 are formed of a steel material having a relatively low price and a high rigidity among metal materials.

As shown in FIG. 4, the reinforcing member 40 further improves the rigidity of the airbag door 30 by overmolding the front surface of the support part 42 on the airbag door 30.

The overmolding molding method refers to a technique of injection molding by overlaying a plastic injection product on a metal insert product, which is well known to those skilled in the art, and thus a detailed description thereof will be omitted.

An operating state of the vehicle airbag door according to the embodiment of the present invention having the above configuration will be described.

In the initial state as shown in FIG. 2, when the impact lamp is transmitted to the vehicle and the sensor is operated, the inflator 22 of the airbag assembly 20 is operated so that the airbag cushion 24 is deployed toward the mounting portion 26.

The airbag door 30 pushed upward by the airbag cushion 24 penetrates the shock absorbing member 50 and the skin member 55, and as shown in FIG. 3, the airbag door 30 is expanded toward the skin member 55.

The airbag cushion 24 is also deployed toward the occupant with the deployment of the airbag door 30, thereby preventing the occupant from colliding with the front core member 35.

In the operating state as described above, the airbag door 30 takes an intensive load at one instant, but the reinforcing member 40 is embedded inside the airbag door 30 to prevent damage to the airbag door 30.

In particular, the hinge portion that is bent by the support member 45 during the deployment operation of the airbag door 30 tends to break into a relatively weak portion, but the reinforcing member 40 even if the hinge portion of the airbag door 30 breaks. By the outer mounting portion 44 of the fastening member 60 is fastened, the airbag door 30 is prevented from coming out to provide improved stability.

In addition, the airbag door 30 and the reinforcing member 40 are integrally produced using an overmolding method from the production stage without using a fastening member such as a separate bolt or pin, and thus, the airbag door 30. And the reinforcing member 40 is not separated from each other in any case, the operation reliability is improved.

Referring to Figure 5 will be described the installation state of the vehicle airbag door according to another embodiment of the present invention.

The reinforcing member 40 made of metal is installed in the middle layer of the airbag door 30 made of plastic, and the reinforcing member 40 as described above is provided with a support part 42 installed at a position for deploying the airbag cushion 24. All of the inner mounting portion 43 that is engaged by the fastening bolts are installed inside the airbag door 30 by an overmolding method.

Then, the airbag door 30 and the core member 35 in which the support member 45 and the reinforcing member 40 are inserted inward by the fastening member 60 are fastened in order.

In addition to the above configuration, the other configuration has the same configuration and the same operation as the embodiment of the present invention.

According to another embodiment of the present invention as described above, because the support portion 42 and the inner mounting portion 43 of the reinforcing member 40 is all overmolded in the airbag door 30, the reinforcing member 40 in the embodiment of the present invention ), The process is simpler than dividing the overmolded part into the unmolded part.

Next, another embodiment of the present invention will be described with reference to FIG. 6.

According to another embodiment of the present invention, the basic structure is the same as the vehicle airbag door 30 shown in FIGS. 2 to 4, but the reinforcing member 40 is overmolded on the airbag door 30. Do.

That is, according to another embodiment of the present invention, the reinforcing member 40 is overmolded with a portion exposed to the airbag door 30.

That is, since the groove 70 is formed along the support 42 of the reinforcing member 40, a part of the reinforcing member 40 is exposed to the outside, and the airbag door 30 of the airbag door 30 is The shape reduces the weight and the weight.

The embodiments of the present invention as described above are not intended to limit the scope of the present invention, but are presented by way of example, and various embodiments may be applied within the spirit of the present invention.

As described above, according to the airbag door for a vehicle according to the present invention, the airbag door is made of a plastic material, a metal material for rigid reinforcement as a reinforcing member, the reinforcing member integrally with the airbag door by using an overmolding method. By minimizing the damage to the corners of the airbag door and the hinge part where the airbag door is bent, damage to the airbag cushion is prevented, and the airbag door is prevented from falling off, thereby providing improved operation reliability and product stability. have.

Claims (7)

A core member installed below the skin member forming the interior surface portion of the vehicle, and having a portion for cutting out the air bag to form a mounting portion; A support member coupled to the mounting portion of the core member and having a hollow formed therein; Located in the hollow of the support member, the airbag door made of plastic material to be deployed to the outside when the airbag deployment; A reinforcing member made of a metal material having one end fixed to the support member while being overmolded on the airbag door; Vehicle airbag door, characterized in that configured to include. The airbag door of claim 1, wherein the support member and the reinforcement member are formed of steel. The vehicle airbag door of claim 1, wherein a shape of the reinforcement member overmolded on the airbag door is a 'c' shape in which one side is opened toward a hinge portion of the airbag door. The vehicle airbag door of claim 1, wherein the reinforcement member is overmolded on the airbag door. The vehicle airbag door of claim 1, wherein the reinforcement member is overmolded with a portion exposed to the airbag door. The vehicle airbag door of claim 1, wherein one end of the reinforcing member is fixed by a fastening member in an overmolded state to the airbag door. The vehicle airbag door of claim 1, wherein one end of the reinforcing member is fixed by a fastening member without being overmolded with the airbag door.

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