KR100747866B1 - The structure all injection invisible passenger air-bag - Google Patents

Abstract

A passenger air bag door structure is provided to smoothly deploy an air bag and to prevent components from spattering to a seat occupant, by injection-molding a pad deployment unit and a chute unit having an air bag door part integrally onto an air bag deployment zone. A passenger air bag door structure includes a pad deployment unit(10) and a chute unit(20). The pad deployment unit is positioned on an upper portion of a head impact zone of a vehicle, and arranged on an air bag deployment zone of a crash pad. The pad deployment unit includes a round part(12) formed on the inner surface thereof. The chute unit includes an air bag door part(22) and an extended part(24). The air bag door part is injection-molded integrally with the pad deployment unit, and tightly contacts a lower surface of the round part. The extended part is extended rearward from the air bag door part and coupled to an air bag housing(6).

Description

Passenger seat airbag door structure {The structure All injection Invisible Passenger Air-Bag}

1 is a view showing a passenger seat airbag door structure according to the present invention.

2a to 2d is a view showing a molding process of the passenger seat airbag door structure according to the present invention.

3a to 3c is an operational state diagram of the passenger seat airbag door structure according to the present invention.

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

1: Head impact zone 2, 4: Upper and lower mold

10: crash pad 12: round part

14: incision groove 20: chute

22: airbag door part 22a: close contact

24: extension portion 26: mounting hole

The present invention provides an airbag on the upper side of the head impact zone so that the airbag operates smoothly without interference by passengers colliding with the area of the head impact zone when a vehicle accident occurs. The pad deployment unit and the airbag door unit are integrally injection-molded on the airbag deployment area in which the deployment operation is performed, so that the pad deployment unit and the airbag door unit made of different dissimilar materials rotate smoothly to the outside of the crash pad to prevent passenger injury. And a passenger seat airbag door structure in which a separate deployment line is not exposed to a car interior.

Recently, due to the increased requirements for vehicle safety and the strengthening of related laws, interest in driver's seat airbags and passenger seat airbags is increasing.

The airbag is installed inside the steering wheel to prevent the driver's head hit the steering wheel when a vehicle collision occurs, or to install a separate airbag inside the crash pad in front of the passenger seat to protect the passengers.

A conventional airbag structure installed at the front of the passenger seat includes an airbag housing provided with an airbag inside the crash pad, a door plate provided at the front of the airbag housing and installed on a crash pad, and provided with a rotating part, and the airbag housing crashed. It is configured to include a chute for coupling to the pad, and a door cover provided on the front of the crash pad. The chute is bolted to the end of the door plate.

In the conventional airbag structure configured as described above, pressure is applied to the door plate while the airbag is deployed, and the airbag is deployed by tearing a tear line formed in the door cover.

If the length of the rotating part is too short or thick during the operation process, when the door plate is not extended enough when the door plate is rotated, the end of the door cover is folded and broken so that debris may fly toward the passenger seated in the passenger seat.

In order to prevent the above problem, a problem arises in that the layout needs to be rearranged to increase the length of the rotating part or to avoid interference of components positioned within the rotational operation range of the door cover.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention provides an airbag with a smooth deployment operation due to a vehicle collision by integrally injection molding a chute provided with a pad deployment portion and an airbag door portion on an airbag deployment area above the head impact zone. The purpose of the present invention is to provide a passenger seat airbag door structure capable of preventing the pad deployment part and the chute from being separated and broken due to the deployment and being scattered to the passengers.

In order to achieve the above object, the passenger seat airbag door structure according to the present invention is located above the head impact zone of the vehicle, and the pad deployment part is provided on the airbag deployment area of the crash pad. An airbag door part which is rounded upwardly at positions spaced apart from both sides of the airbag, which is injection molded integrally with the pad deployment part and closely coupled to the lower side of the round part, and extends to the rear of the airbag door part to be coupled to the airbag housing It characterized in that it is configured to include a chute formed extending portion.

Preferably, the pad development part is formed of a hard PPF (Thermo Plastic Olefin) material, and the chute part is composed of a ductile polypropylene filled (TPO) material.

The pad deployment portion is preferably formed with a cutout in the center of the lower side.

The cutting groove is preferably formed in the cross-sectional shape of the "∧" shape or "H" shape.

Preferably, the airbag door part is formed to be in close contact with the bottom side of the round part and is formed to be thicker than the thickness of the round part.

The chute portion is configured to have a mounting hole coupled with the catching portion of the airbag housing.

A preferred embodiment of the passenger seat airbag door structure according to the present invention as described above will be described with reference to the drawings.

1 is a view illustrating a passenger seat airbag door structure according to the present invention, and FIGS. 2A to 2D are views illustrating a molding process of the passenger seat airbag door structure according to the present invention.

 Located at the upper side of the head impact zone (1) of the vehicle, the pad deployment unit 10 is provided on the airbag deployment area of the crash pad, wherein the pad deployment unit 10 is spaced apart from both sides of the inner bottom surface, respectively. It is configured to include a rounded portion 12 rounded upwards. The pad deployment portion 10 is formed of a hard PPF material.

The pad deployment portion 10 is preferably formed with a cutting groove 14 in the center of the lower side. This is because both sides of the pad deployment portion 10 are operated at a uniform length about the round portion 12 when the pad deployment portion 10 is rotated to the outside of the crash pad by the inflating force of the airbag 1.

The cutting groove 14 is preferably formed in the cross-sectional shape of the "∧" shape or "H" shape. This is because the airbag 1 can be smoothly broken by the expansion force applied to the airbag door part 22 during operation.

The airbag door part 22 has a close contact portion 22a which is tightly coupled to the lower side of the round part 12. At this time, when the thickness of the round part 12 is called "t" and the thickness of the close contact part 22a is "t '", the relationship of t <t' is established.

That is, the thickness t 'of the close contact portion 22a is preferably formed to be thicker than the thickness t of the round portion 12. Because the material of the round part 12 is a relatively hard material compared to the material of the close part 22a is configured as described above for a smooth operation of the close part 12a.

The airbag door part 22 which is injection molded integrally with the pad deployment part 10 and tightly coupled to the lower side of the round part 12, extends to the rear of the airbag door part 22, and is engaged with the airbag housing 6. It is configured to include a chute 20, the extension portion 24 is formed so as to. The chute 20 is preferably made of a high ductility TPO material. The chute 20 is configured to have a mounting hole 26 coupled with the engaging portion 6a of the airbag housing 6.

The reason why the hound portion 12 is formed in the pad deployment portion 10 is to facilitate the expandability when the airbag door portion 22 is rotated to the vehicle interior by the deployment pressure of the airbag 1.

The molding process and the operating state of the passenger seat airbag door structure according to the present invention configured as described above will be described in detail with reference to the drawings.

A molding process of the passenger seat airbag door structure will be described with reference to FIGS. 2A to 2C.

Referring to FIG. 2A, as shown in the drawing, the material of the pad developing part 10 is injected through an injection machine (not shown) separately provided in the state where the upper and lower molds 2 and 4 are coupled.

The slide mold 4a is positioned to have a separation distance spaced apart from the lower mold 4 by “a”. In the above state, as the material of the pad development part 10 is injected through the injection molding machine, the pad development part 10 is formed along the rounded shape of the round part 12.

The lower mold 4 is provided with a mold frame in the form of "∧" or "H" so that the cutout groove 14 formed in the lower surface of the pad deployment part 10 is formed as shown in the drawing.

The incision groove 14 is located between the rotating part 12 formed in the crash pad 10, it is formed in the middle (L / 2) position of the distance (L) where the rotating part 12 is located.

In the state where the injection to the pad development part 10 is completed, the slide die 4a is moved along the direction of an arrow, respectively.

Referring to FIG. 2B, as shown in FIG. 2A, a chute part integrally formed with a lower surface of the pad deployment part 10 through an injection machine (not shown) in a state in which the slide mold 4a is moved in an arrow direction ( 20) injection is made.

The mounting hole 26 formed on the chute 20 is injected in the state inserted into the extension part 24 by a separate insertion member. In the upper side of the slide mold 4a, as shown in the drawing, the close contact portion 22 is injection molded below the round part 12, and the chute portion 20 is integrally formed with the close contact portion 22. .

Referring to FIG. 2C, as shown in the drawing, the injection line is retracted in the state in which the injection to the chute 20 is completed, and the mounting hole 26 is located at the position of the chute 20 from which the injection line is retracted. ) Is formed.

Referring to FIG. 2D, the airbag 1 is retracted while the upper and lower molds 2 and 4 (see FIG. 2A) for ejecting the door pad deployment part 10 and the chute part 20 are both retracted. The engaging portions 6a of the provided airbag housing 6 are coupled to the mounting holes 26, respectively.

The operating state of the passenger-side airbag door structure according to the present invention molded as described above will be described in detail with reference to the drawings.

Referring to FIG. 3A, when the vehicle travels along the road and collides with the vehicle ahead or facing the vehicle, a sensor (not shown) provided in the vehicle body detects this and the airbag 1 is deployed.

As shown in the figure by the inflator (not shown) provided separately, the airbag 1 is applied to the lower side of the airbag door portion 22 while being deployed toward the front of the airbag housing 6.

Referring to FIG. 3B, as shown in FIG. 3A, an inflation force is applied to the lower side of the airbag door part 22, and a fracture occurs at the cut groove 14 (see FIG. 3A) of the pad deployment part 10. .

At the same time, the round part 12 joined to the contact part 22a of the airbag door part 22 is rotated to the outside, and the entire pad deployment part 10 is rotated to the outside, so that the airbag 1 is deployed into the vehicle interior. It begins to be.

Since the airbag door part 22 is made of a soft material, the airbag door part 22 is easier to expand than the pad deployment part 10 made of a hard material, and the thickness of the airbag door part 22 made of a soft material when the vehicle is rotated to a vehicle interior. Is formed relatively thicker than the thickness of the pad deployment portion 10, the portion of the close contact portion 22a formed in the airbag door portion 22 serves as a hinge sufficiently.

Referring to FIG. 3C, the pad deployment unit 10 is fully operated by the inflating force of the airbag 1 in the state shown in the drawing in the state of FIG. 3B, so that the airbag 1 is deployed outwards to perform a smooth deployment operation. The passengers in the passenger seat are protected from the impact of the vehicle crash.

At this time, the pad deployment part 10 and the airbag door part 22 are sufficiently bonded so that problems such as detachment or breakage due to rotation do not occur, so that the phenomenon of injury to passengers seated in the passenger seat of the vehicle does not occur. The close contact portion 22a of the portion 22 is sufficiently expanded in accordance with the rotation of the round portion 12, thereby achieving a smooth operation.

As described above, the passenger seat airbag door structure according to the present invention is molded by integral injection so that the joint line between the vehicle compartment pad deployment portion and the airbag door portion is not visible, thereby reducing the cost due to the unification of the mold and generating gaps and steps generated during assembly. There is an effect that can solve the problems such as.

In addition, by forming an incision groove on the pad deployment portion to avoid interference by the passengers collided with the area of the head impact zone, the airbags can be deployed safely and at the same time the passengers from the impact caused by the vehicle collision It has a protective effect.

In addition, since the existing parts such as metal plates and rings are unnecessary, cost reduction and load reduction are possible due to the reduction of the number of parts, and the joint strength is improved by increasing the joint area of the pad deployment part and the airbag door part. There is an effect that does not occur or break due to the rotation of the.

Claims (7)

Located on the upper side of the vehicle head impact zone (Head Impact Zone) and the pad deployment portion is provided on the airbag deployment area of the crash pad, the pad deployment portion includes a rounded portion rounded upwards at positions spaced apart on both sides of the inner bottom surface, ,  An airbag door part which is injection molded integrally with the pad deployment part and is tightly coupled to the lower side of the round part; And A passenger seat airbag door structure, comprising: a chute part extending from the rear of the airbag door part and having an extension part coupled to the airbag housing. The method of claim 1, The pad deployment unit passenger seat airbag door structure, characterized in that the incision groove is formed in the center of the lower side. The method of claim 2, The incision groove is a passenger seat airbag door structure, characterized in that the cross-sectional shape is formed in the "∧" shape. The method of claim 2, The incision groove is a passenger seat airbag door structure, characterized in that the cross-sectional shape is formed in the "H" shape. The method of claim 1, A passenger seat airbag door structure, wherein the airbag door part is formed to be in close contact with a lower side of the round part and is formed to be thicker than the thickness of the round part. The method of claim 1, The pad deployment portion is formed of a hard material, and the passenger-side airbag door structure of the chute part is made of a soft material. The method of claim 1, The passenger seat airbag door structure, characterized in that the chute is provided with a mounting hole coupled with the engaging portion of the airbag housing.

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