KR20060092659A - Structure of airbag door for passanger of a car - Google Patents

Abstract

The present invention relates to a passenger seat airbag door structure for automobiles, while ensuring a sufficient length of the airbag door while preventing the airbag door's lower end from injuring the face of the passenger during airbag deployment, and preventing contact with the windshield glass. The object of the present invention is to prevent damage to the windshield glass.

To this end, the present invention is an airbag door partitioned by a rupture groove formed on the rear surface of the instrument panel in the vehicle interior; A first hinge part having a fixing part fixed to a frame installed inside the instrument panel, a first hinge point bent at the lower end of the fixing part and connected integrally, and from the lower end to the end of the first hinge part; An inner plate formed of a deployment part fixed to an inner side of the airbag door while forming a same surface as an instrument panel; A passenger seat airbag door structure for a vehicle comprising: a predetermined portion between a first hinge portion of the inflator and an end of the deployed portion is provided with a second hinge portion forming a second hinge point, and is formed on a rear surface of the airbag door. A groove-shaped recess is formed at a position corresponding to the second hinge portion.

Passenger seat, passenger, airbag, concealed type, door, hinge part, turning radius, windshield glass

Description

Passenger Airbag Door Structure for Cars {Structure of Airbag Door for Passanger of a Car}

1 is a perspective view showing a position where the passenger seat airbag module according to the prior art is installed,

2 is a cross-sectional view showing the structure of a passenger seat airbag module according to the related art;

3 is a cross-sectional view showing a deployment structure of a passenger seat airbag door according to the related art;

4 is a cross-sectional view showing the structure of a passenger seat airbag module according to the present invention;

5 is a perspective view of an inner plate fixed to the passenger seat airbag door according to the present invention;

Figure 6 is a sectional view showing a deployment structure of the passenger seat airbag door according to the present invention.

Explanation of symbols on the main parts of the drawings

11: Instrument Panel,

12, 22: Airbag Door,

12a, 22a: bursting groove,

13: airbag,

14: Inflator,

15: housing,

16, 26: inner plate (Inner Plate),

16a, 26a: fixed part,

16b, 26b: first hinge portion,

16c, 26c: development part,

26d: second hinge portion,

30: reinforcement plate,

40: Tether.

The present invention relates to an airbag door deployment structure for passengers, and more particularly, to secure the length of the airbag door while preventing the lower end of the airbag door from injuring the passenger's face during the airbag deployment, the windshield glass The present invention relates to a passenger airbag door deployment structure capable of preventing contact with the windshield and preventing damage to the windshield glass.

BACKGROUND ART In general, an automobile is equipped with an airbag module, which is a safety device that protects the driver and passengers from shocks generated during a sudden stop or a collision while minimizing human injury. These airbag modules are classified into a driver's seat airbag module mounted on a steering wheel of a driver's seat and a passenger seat airbag module mounted in a top mounting form at a predetermined position of an instrument panel located on the front side of the passenger seat.

Among these, the passenger seat airbag module according to the related art is mounted on an instrument panel 11 on a glove box 10 located on the passenger seat side of the vehicle, as shown in FIGS. 1 and 2. More specifically, the passenger seat airbag module is an airbag that is folded on the airbag door 12 formed on the instrument panel 11 and the lower side of the airbag door 12, that is, inside the instrument panel 11 in a cushion form. And a housing 15 for housing the inflator 14 for supplying gas to the airbag 13 to inflate the airbag 13.

Here, the airbag door 12 has been used in the detachable structure that is manufactured and assembled in a state separated from the instrument panel 11, but recently the front of the instrument panel 11 (skin (Skin) to improve the appearance Skin-integrated structure is formed in which the rupture groove 12a which is formed integrally with)) and is ruptured by the inflation force of the airbag 13 deployed at the time of the automobile collision is formed on the rear surface of the instrument panel 11. The latter case is called an invisible door because it is not normally exposed to the outside at all.

The rupture groove 12a is made in advance in the injection molding process on the rear surface of the instrument panel 11, or is processed by a laser beam after the instrument panel 11 is manufactured.

An inner plate 16 having a structure pivoted at an angle is fixed to the inside of the airbag door 12 having such a structure to prevent the airbag door 12 from being separated when the airbag 13 is deployed. have.

The inner plate 16 is integrally connected to the lower end of the fixing part 16a and the fixing part 16a which are fixedly connected to the coupling groove of the frame 17 by the fastening means, and is hinged. The deployment part 16c which has the same curved surface as the said instrument panel 11 at the lower end of the hinge part 16b and the hinge part 16b which forms a point, and has the magnitude | size corresponding to the internal area of the said tearing groove 12a. ).

The deployment part 16c may be formed of a steel material to reinforce the rigidity of the door itself, and may also be formed of a thermoplastic olefin (TPO) material. When the deployment part 16c is formed of a TPO material, the deployment part 16c may be firmly attached to the inner side of the door 12 by vibration welding or heat welding.

On the other hand, when the deployment part 16c is formed of a steel material, it is provided with a plurality of fastening holes in the width direction through the fastening holes, as shown in FIG. 2, inside the door 12. It is preferable that the fastening means 18 is firmly fastened. The deployment part 16c of this structure ruptures the rupture groove 12a while pivoting upward from the hinge part 16b when the airbag 13 is deployed. The door 12 opened by this protrudes outward while drawing a constant turning radius with the deployment part 16c.

However, according to the conventional passenger seat airbag module structure, since the turning radius of the door 12 is large, when the passenger of the passenger seat is in an out of position (OOP) seat due to inertia during the vehicle collision, the face of the passenger Or there was a fatal problem that the head is injured by hitting the lower end of the door 12.

In addition, the lower end of the door 12 is further bent to the windshield glass (19) side around the hinge portion (16b) by the expansion force of the airbag deployed to break the windshield glass 19 there was.

As an example for solving this problem, the length of the door 12 may be short, but in this case, the length dimension required to cover the housing 15 for accommodating the airbag module may not be satisfied, and the airbag 13 may be satisfied. There is a problem that the airbag 13 may not be properly deployed by narrowing the deployment passage.

As another example, when the hinge portion 16b of the inner plate 16 is relocated toward the windshield glass 19, injury to the passenger's body can be prevented, but the windshield glass 19 There is a problem that the contact force is increased and the damage of the windshield glass 19 cannot be avoided.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, while ensuring a sufficient length of the airbag door, while preventing the lower end of the airbag door from injuring the passenger's face during airbag deployment, the windshield glass It is an object of the present invention to provide a passenger airbag door deployment structure that can prevent contact with the windshield and prevent the windshield glass from being damaged.

The present invention for achieving the above object, the airbag door partitioned by a rupture groove formed on the rear surface of the instrument panel in the vehicle compartment; An inner plate coupled to an inner surface of the airbag door, the first hinge having a fixing part fixed to a frame installed inside the instrument panel and a first hinge point bent and integrally connected to a lower end of the fixing part. A passenger seat including an inner plate comprising a branch and an expansion part which is fixed to the inside of the airbag door while forming the same surface as the surface of the instrument panel from the lower end to the end of the first hinge part, and upwardly deploying the first hinge part as a starting point. In the airbag door structure, a second hinge portion that forms a second hinge point is formed at a predetermined portion between the first hinge portion of the inner plate and the end of the deployment portion, and the second hinge portion is formed on a rear surface of the airbag door. And a recessed portion having a groove shape is formed at a position corresponding to the groove.

The second hinge portion may be positioned on a plurality of slot lines formed at predetermined intervals in a width direction of the deployment portion.

In addition, a reinforcing plate having a dimension equal to the width dimension of the inner plate is fixed to an upper surface between the fixing portion of the inner plate and the first hinge portion.

In addition, one end is fixed to the back of the fixing portion of the inner plate, the other end is further included a tether (Tether) is fixed to the back between the first hinge portion and the second hinge portion of the inner plate Characterized in that.

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

Figure 4 shows a cross-sectional view showing the structure of the passenger seat airbag device according to the present invention, Figure 5 shows a perspective view of the inner plate fixed to the passenger seat airbag door according to the present invention.

As shown in Figures 4 and 5, the passenger seat airbag module according to the present invention, as in the prior art, the airbag door 22 formed in the instrument panel 11 in the vehicle interior; An inner plate 26 coupled to an inner surface of the airbag door 22; Since the inside of the instrument panel 11 has a structure that includes a housing 15 is built in the inflator 14 to supply the gas to the air bag 13 to expand the air bag 13 in the event of a car collision Hereinafter, the same reference numerals are given to the same configurations as in the prior art.

The airbag door 22 is pre-processed by the rupture groove 22a or the scoring line by the laser beam on the back surface of the instrument panel 11 in order to open by the inflating force of the airbag 13 is broken Concealed door to make it easier.

Here, when the airbag 13 is inflated, the airbag door 22 protrudes while being ruptured upwardly, that is, upwardly, with the inner plate 26 as the tearing groove 22a ruptures.

The inner plate 26 may be formed of a TOP material or a steel material, and is preferably formed of a steel material in terms of reinforcing rigidity of the airbag door itself.

Here, the inner plate 26 has a structure of a plurality of fastening holes 26a for fastening and fixing the frame 17 installed in the inside of the instrument panel 11 by fastening means, as shown in detail in FIG. 5. -1) and the first to form a first hinge point having a slot (Slot) in the rear end bent surface portion is integrally connected and bent from the lower end of the fixing portion (26a) It consists of the hinge part 26b and the developing part 26c which forms the same curved surface as the said instrument panel 11 from the lower end to the end of the said 1st hinge part 26b.

On the other hand, the deployment portion 26c has a plurality of fastening holes 26c-1 to be firmly attached to the inner surface of the airbag door 22 by a fastening means having a size corresponding to the inner region of the rupture groove 22a. Equipped.

In this way, the deployment part 26c is attached to the inner side of the airbag door 22 and serves to be deployed upward while bending the first hinge part 26b to the starting point by the airbag 13 that is inflated when the vehicle crashes. do. Furthermore, the upper surface between the fixing portion 26a and the first hinge portion 26b can sufficiently exhibit the hinge action of the first hinge portion 26b and make the fixing portion 26a more firmly. In order to be able to support, the reinforcement plate 30 which has the same width dimension as the inner dimension of the said inner plate 26, and is bent from the center part is fixed.

In the development part 26c which has such a structure, the 2nd hinge part 26d which forms the 2nd hinge point further is formed between the intermediate point, ie, between the said 1st hinge part 26b and the end part of the said deployment part 26c. It is. The first hinge portion 26b and the second hinge portion 26d are each positioned on a plurality of slot lines formed at predetermined intervals in the width direction of the inner plate 26.

The thickness of the portion where the first hinge portion 26b and the second hinge portion 26d are formed is thinner than the thickness of the other portion, and the thickness of the side of the first hinge portion 26b is the second hinge portion 26d. It is preferable to be made thinner than the thickness of the side.

As will be described later, the inner plate 26 is bent while bending toward the outside primarily from the first hinge portion 26b when the airbag 13 is deployed, and then the airbag 13 is deployed. The second hinge portion 26d is bent and bent outwardly again by the expansion force, thereby ensuring the maximum length of the airbag door 22 while appropriately rotating the radius of rotation of the lower end of the airbag door 22. To adjust.

On the other hand, when the deployment portion 26c is bent from the second hinge portion 26d, the rear surface of the airbag door 22 is also bent so that the airbag door 22 fixed to the deployment portion 26c is bent as well. A plurality of recessed portions 22b having a groove shape are formed at a position corresponding to the second hinge portion 26d at predetermined intervals in the width direction of the airbag door 22.

In particular, the present invention is a tether (Tether) to prevent the airbag door 22 which is opened while drawing a constant turning radius when the airbag 13 is deployed no longer rotated, and prevents contact with the windshield glass 19 in advance. , 40).

Here, one end of the tether 40 is fixed to the hook portion formed on the rear surface of the fixing portion 26a of the inner plate 26, and the other end thereof is the first hinge portion 26a of the inner plate 26. And a ring portion formed on the rear surface between the second hinge portion 26d. The tether 40 is preferably formed of a material that can withstand a relatively large load, for example, may be formed of a nylon or cloth.

The operation of the airbag door structure according to the present invention as described above with reference to Figure 6 as follows.

First, a collision detection sensor (not shown) electrically connected to the inflator 14 during a vehicle driving detects the collision and ignites the inflator 14.

Subsequently, the inflator 14 supplies gas to the airbag 13 to inflate the airbag 13, and the airbag 13 folded in the airbag housing 15 is gradually expanded while the inner plate 26 is inflated by the inflation force thereof. Push out the deployment part 26c). The developing part 26c is rotated upward to the back side of the instrument panel 11 using the first hinge part 26b as a hinge point.

As a result, the airbag door 22 is opened while the tear groove 22a pre-processed on the rear surface of the inner panel 11 is ruptured by the rotated deployment portion 26c, and the outside is opened together with the deployment portion 26c. To protrude.

At this time, the recessed portion 22c and the second hinge portion 26d formed at positions corresponding to the rear surfaces of the deployment portion 26c and the airbag door 22 protruding to the outside are more vulnerable than other portions. Therefore, the part is bent at an angle by the inflating force of the airbag to be deployed to the outside.

As a result, the airbag door 22 is turned while drawing a constant turning radius while a part thereof is bent, so that the turning radius is shorter than in the related art. Therefore, as the pivot point of the airbag door 22 is pulled forward by a predetermined distance, that is, forward from the face of the passenger, compared to the prior art, even if the passenger is in an abnormal seating, there is no injury to the face of the passenger.

Moreover, when the airbag door 22 is opened to some extent, further rotation is prevented by the tether 40 fixed between the fixing part 26a of the inner plate 26 and the second hinge part 26d. do.

In this state, only the lower end portion of the airbag door 22, that is, the portion from the depression 22c to the end portion of the airbag door 22 is rotated to the windshield glass 19 by the airbag 13 fully deployed to the outside. As shown, the end is not in contact with the windshield glass 19 and a constant distance d is maintained, thereby preventing breakage of the windshield glass.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. This will be possible.

As described above, according to the present invention, by adopting the configuration of forming a weak portion at each corresponding position of the back of the airbag door and the back of the deployment portion of the inner plate fixed to the airbag door, a part of the airbag door is fixed at the time of airbag deployment. As the pivot point of the airbag door is shortened as compared with the related art, it is possible to prevent the face part of passengers in abnormal seating from being injured by the lower end of the pivoted airbag door in the event of a car collision. There is a number.

According to the present invention, when the airbag door is opened to some extent, the tether is fixed to a predetermined portion of the inner plate fixed to the inner surface of the airbag door to prevent further rotation, thereby preventing contact with the windshield glass. This can prevent damage to the windshield glass.

Claims (4)

An airbag door 22 partitioned by a rupture groove 22a formed on a rear surface of an instrument panel 11 in the vehicle interior; An inner plate coupled to an inner surface of the airbag door 22, a fixing part 26a fixed to a frame 17 installed inside the instrument panel 11, and the fixing part 26a. A first hinge portion 26b having a first hinge point bent and integrally connected to a lower end of the first hinge portion 26b, and a surface identical to the surface of the instrument panel 11 from the lower end to the end of the first hinge portion 26b. An inner plate 26 fixed to the inside of the airbag door 22 and having a deployment part 26c which is upwardly deployed from the first hinge part 26b; In the passenger-side airbag door structure comprising: A second hinge portion 26d defining a second hinge point is formed at a predetermined portion between the first hinge portion 26a of the inner plate 26 and the end of the deployment portion 26c, and the airbag door ( 22) The passenger-side airbag door structure of claim 22, wherein a recessed portion 22b having a groove shape is formed at a position corresponding to the second hinge portion 26d. The method of claim 1, The second hinge portion (26d) is located on the slot line formed a plurality of slots at predetermined intervals in the width direction of the deployment portion (26c). The method of claim 1, The reinforcing plate 30 having the same dimensions as the width of the inner plate 26 is fixed to the upper surface between the fixing portion 26a and the first hinge portion 26b of the inner plate 26. Passenger seat airbag door structure. The method according to any one of claims 1 to 3, One end is fixed to the rear surface of the fixing portion 26a of the inner plate 26, and the other end is the rear surface between the first hinge portion 26b and the second hinge portion 26d of the inner plate 26. A passenger seat airbag door structure further comprising a tether (Tether) fixed to and connected to the tether.

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