JP2000272455A - Instrument panel integrated with air bag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the developing performance of an air bag body without impairing appearance. SOLUTION: The surface skin 12 of an instrument panel 10 is formed by two-tone color and bent in U-shape at the partition line 14 of an upper cuticle 16 and lower cuticle 18. The depth of position 14A of a partition line groove 14 near the door outside of a door lateral tear line groove 24 is deepened in comparison with the depth of the door lateral tear line groove 24 at an extension line L of a door vertical tear line 26A. A difference is provided between the tear resistance of the door lateral tear line groove 24 and the tear resistance of the position 14A of the partition line groove 14. Therefore, when a door insert is developed, the tear of the surface skin 12 does not extend from the door lateral tear line groove 24 to the partition line groove 14 and the door vertical tear line 26A becomes easy to tear at this rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument panel having an airbag door unit, and more particularly, to an airbag door unit of a foaming type having a foam layer between a skin and a substrate. The invention relates to an instrument panel having the same.

[0002]

2. Description of the Related Art Conventionally, an example of a structure in which an airbag door portion of an airbag device for a passenger seat is integrated with an instrument panel is disclosed in Japanese Utility Model Laid-Open No. 5-58517.

As shown in FIG. 8, an instrument panel 100 having an airbag door unit integrally has a three-layer structure of an instrument panel insert (base material) 102, a foam layer 104, and a skin 106. , A foam type, of which an opening 1 is provided at a predetermined portion of the instrument panel insert 102 on the passenger seat side.
08 is formed. An airbag device 112 that inflates the airbag body 110 toward the passenger seat when a predetermined high load is applied is provided at a position facing the opening 108.

[0004] Instrument panel insert 102
The door inserts 114 and 116 are fixed to the opening 108 by a fixing member 118 such as a rivet, so that the opening 108 is closed. A break line 120 is formed near the boundary between the door inserts 114 and 116 on the skin 106, which breaks when the airbag body is deployed.

[0005]

However, in such an instrument panel integrally having an airbag door portion, the tear line (break line) 120 for opening the door portion is exposed on the design surface, so that the design is not improved. Constrained and appearance quality deteriorates. In particular, in a so-called two-tone instrument panel in which the skin of the instrument panel is divided into upper and lower or front and rear, a parting line groove of the skin is also exposed on the design surface, so that the design is further restricted and the appearance quality is further reduced. Further decline. In order to improve this, it is conceivable to match the airbag door part lateral tear line groove extending in the vehicle width direction of the airbag door part with the color arrangement parting line groove of the skin, but in this case, When the airbag body is deployed, the skin is cleaved only along the side tier line groove of the airbag door portion, and the air formed in the other tier line grooves, for example, the portions corresponding to the left and right ends of the airbag door portion. It is difficult to split along the vertical tier line of the bag door. As a result, it is difficult to ensure the deployment performance of the airbag bag.

The present invention has been made in view of the above circumstances, and has as its object to provide an instrument panel integrally having an airbag door portion capable of securing the deployment performance of an airbag body without deteriorating appearance.

[0007]

According to a first aspect of the present invention, there is provided an instrument panel which is of a foaming type having a foaming layer between a skin and a base material and has an airbag door unit integrally therewith. The parting line groove formed along the color parting line of the above and the position of the airbag door portion side tear line groove are made to coincide with each other to be continuous with each other, and the tear resistance of the airbag door portion side tear line groove and A difference is provided in the tearing resistance of the parting line groove.

Accordingly, the parting line groove formed along the color arrangement parting line is aligned with the side tear line groove of the airbag door portion, so that the appearance is good. In addition, since there is a difference between the tear resistance of the side tear line groove of the airbag door and the tear resistance of the parting line groove, when the airbag body is deployed, the gap between the side tear line groove of the airbag door part and the parting line groove is reduced. The stress concentrates, and the tearing of the skin does not spread from the horizontal tear line groove of the airbag door portion to the parting line groove, and the vertical tear line of the airbag door portion is easily torn accordingly. As a result, the skin can be reliably torn along the tear line, and the deployment performance of the airbag bag can be ensured.

According to a second aspect of the present invention, in the instrument panel having the airbag door portion of the first aspect, the depth of the parting line groove adjacent to the lateral tear line groove of the airbag door portion is reduced. The feature is that it is different from the extension line of the vertical tier line of the airbag door.

[0010] Therefore, in addition to the contents described in claim 1, a simple configuration in which only the depth of each of the side tear line grooves adjacent to the airbag door portion and the adjacent parting line grooves is changed without impairing the appearance. The deployment performance of the airbag bag can be ensured.

According to a third aspect of the present invention, there is provided an instrument panel which is of a foaming type having a foaming layer between a skin and a base material and has an airbag door unit integrally therewith. The parting line groove and the airbag door portion side tear line groove are aligned to be continuous with each other, and are located outside the airbag door with reference to the extension line of the airbag door portion vertical tear line. The facing skins of the parting line grooves are joined to each other.

Therefore, since the parting line groove formed along the color arrangement parting line and the side tear line groove of the airbag door portion are matched, the appearance is good. In addition, the facing skin of the parting line groove located outside the airbag door is joined to each other based on the extension line of the vertical tier line of the airbag door part, so that when the airbag body is deployed, it is separated from the side tier line groove of the airbag door part. Stress concentrates on the boundary with the line groove, and the tearing of the epidermis does not spread from the side tier line groove of the airbag door part to the parting line groove, making it easier for the vertical tier line of the airbag door part to tear. . As a result, the skin can be reliably torn along the tear line, and the deployment performance of the airbag bag can be ensured. Further, with a simple configuration in which the facing skins of the parting line groove are simply joined to each other, the deployment performance of the airbag bag body can be secured without impairing the appearance.

According to a fourth aspect of the present invention, there is provided an instrument panel which is of a foaming type having a foaming layer between a skin and a base material and has an airbag door unit integrally therewith. The position of the parting line groove formed in this manner and the position of the airbag door portion side tear line groove are matched, and the parting line groove and the airbag door portion side tear line groove are discontinuous. I do.

Therefore, the parting line groove formed along the color arrangement parting line coincides with the side tear line groove of the airbag door portion, so that the appearance is good. Furthermore, since the color arrangement parting line groove and the airbag door side tear line groove are discontinuous, stress concentrates on the boundary between the airbag door part lateral tear line groove and the parting line groove when the airbag body is deployed. Therefore, the tearing of the epidermis does not spread from the side tear line groove on the side of the airbag door to the parting line groove.
The vertical tear line of the airbag door is easily split. As a result, the skin can be reliably torn along the tear line, and the deployment performance of the airbag bag can be ensured. In addition, with a simple configuration that only makes the parting line groove and the airbag door part side tear line groove discontinuous,
The deployment performance of the airbag bag can be secured without impairing the appearance.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of an instrument panel having an airbag door unit according to the present invention.
This will be described in detail with reference to FIG.

In the drawings, the arrow FR indicates the forward direction of the vehicle, and the arrow UP indicates the upward direction of the vehicle.

As shown in FIG. 3, an instrument panel 10 of the present embodiment includes a resin skin 12 disposed on the vehicle interior side, and an instrument panel insert 13 spaced apart from the skin 12. And a foam layer 15 filled between the skin 12 and the instrument panel insert 13, which is a so-called foam type. Although the skin 12 has relatively low strength, the instrument panel insert 1
3 has a relatively high strength.

As shown in FIG. 2, the skin 12 of the instrument panel 10 is coated with a powder,
An upper skin 16 which is a two-tone color by color molding or the like and is above a parting line 14 extending in the horizontal direction;
The lower skin 18 below the parting line 14 has a different color. Instrument panel 10 on the passenger side
An airbag device 20 is disposed inside the airbag device, and a rectangular airbag door portion 10A is formed at a portion of the instrument panel 10 substantially opposed to the airbag device 20. The rear end (free end) of the airbag door portion 10A is disposed along the parting line 14, and forms an airbag door portion (hereinafter, referred to as a door portion) lateral tear line groove 24. A substantially U-shaped airbag door portion (hereinafter, referred to as a door portion) tear line 26 in a plan view is formed at the front end and the left and right ends of the airbag door portion 10A in the upper skin 16. The rear end of the formed door vertical tear line 26A reaches the door horizontal tear line groove 24.

As shown in FIG.
Is a substantially box-shaped airbag case 30 and a substantially cylindrical inflator 3 fixed inside the airbag case 30.
2 and an airbag body 34 disposed in the airbag case 30 in a folded state. Further, the airbag case 30 is fixed to a vehicle frame member such as the instrument panel reinforcement 36.

An opening 46 is formed in the instrument panel insert 13 at a position substantially opposed to the airbag device 20, and the opening 46 is closed by a door insert 48 as a base material of an airbag door portion.
The front edge 48A of the door insert 48 is attached to the front edge of the opening 46 of the instrument panel insert 13 by a fixing member 48 such as a bolt, a nut, or a rivet via a fixing portion reinforcing bracket 50. 48 opens substantially upward (in the direction of arrow A in FIG. 3) with the vicinity of the front edge portion 48A as a hinge portion.

As shown in FIG. 1, the skin 12 of the instrument panel 10 is bent into a U-shaped cross section at the parting line 14 (long U type), and as shown by a dashed line in FIG. The cross-sectional shape of the line 26 is also substantially U-shaped (long U type). In addition, the parting line groove 1 near the outside of the door portion of the horizontal tear line groove 24 relative to the depth H1 of the door portion horizontal tear line groove 24 with respect to the extension line L of the door portion vertical tear line 26A.
4 has a deeper depth H2 (H2> H).
1) There is a difference between the tear resistance of the door part side tear line groove 24 and the tear resistance of the part 14A in the parting line groove 14. Therefore, when the door insert 48 is unfolded, the tearing of the skin 12 does not spread from the door portion side tear line groove 24 to the parting line groove 14, and the door portion vertical tear line 26A is easily torn accordingly. .

Next, the operation of the present embodiment will be described.

When a predetermined high load is applied, that is, when the vehicle suddenly decelerates, an airbag sensor (not shown) senses this and the inflator 32 operates. For this reason, a large amount of gas is generated, the airbag body 34 is inflated, and the airbag door portion 10A of the instrument panel 10 is pressed from the back side.

At this time, the bulging load (inflation pressure) from the airbag bag 34 is transmitted to the door insert 48 of the airbag door portion 10A, and the door insert 48 is substantially hinged around the front edge 48A. Upward (arrow A in FIG. 3)
Direction).

At this time, in the present embodiment, since the parting line 14 between the upper skin 16 and the lower skin 18 coincides with the door portion side tear line groove 24 of the airbag door portion 10A, the skin 12 is It breaks along the parting line 14 between the skin 16 and the lower skin 18.

In the present embodiment, the door horizontal tear line groove 24 is larger than the depth H1 of the door horizontal tear line groove 24 at the extension L of the door vertical tear line 26A.
14A of the parting line groove 14 near the outside of the door
Is deeper (H2> H1), and a difference is provided between the tear resistance of the door portion side tear line groove 24 and the tear resistance of the portion 14A in the parting line groove 14, so that when the door insert 48 is deployed, The stress concentrates on this boundary, and the tearing of the skin 12 causes the door portion side tear line groove 24 to break.
, The door portion vertical tear line 26A is easily torn. As a result, with a simple configuration that only changes the groove depth of the parting line groove 14,
The airbag door portion 10A can be deployed at an early stage, and the deployment performance of the airbag bag body 38 can be secured.

Further, in the present embodiment, the door portion side tear line groove 24 is provided with two-tone upper skin 16 and lower skin 1.
8, the appearance quality is good because the deterioration of the appearance quality due to the door part side tear line groove 24 and the parting line 14 can be suppressed.

In this embodiment, the door side horizontal tear line groove 24 is larger than the depth H1 of the door horizontal tear line groove 24 on the extension line L of the door vertical tear line 26A.
14A of the parting line groove 14 near the outside of the door
Was made deeper (H2> H1) to provide a difference between the tear resistance of the door portion side tear line groove 24 and the tear resistance of the portion 14A in the parting line groove 14, but instead of this,
As shown in FIG. 4, the depth H3 of the entire area 14B of the parting line groove 14 excluding the door part lateral tear line groove 24 is made deeper (H3) than the depth H1 of the door part lateral tear line groove 24.
> H1), the same effect can be obtained. Also, as shown in FIG. 5, the depth H4 of the entire area 14B of the parting line groove 14 excluding the door side tear line groove 24 is shallower than the depth H1 of the door part side tear line groove 24 (H4 <H1). )
The same effect can be obtained.

Next, a second embodiment of the instrument panel of the present invention having an airbag door unit will be described in detail with reference to FIG.

Note that the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 6, in this embodiment, the door part vertical tear line 26 of the door part horizontal tear line groove 24 is provided.
With reference to the extension line L of A, at a portion 14C located outside the door, the facing skins of the parting line groove 14 are joined to each other in a region of a predetermined width W by welding, bonding, or the like to form a joining portion 53. Thus, a difference is provided between the tear resistance of the door portion side tear line groove 24 and the tear resistance of the portion 14C in the parting line groove 14. Therefore, when the door insert 48 is deployed, stress concentrates on this boundary portion, and the tearing of the skin 12 is caused by the door portion side tear line groove 2.
4 does not spread to the parting line groove 14, so that the door portion vertical tear line 26A is easily broken.

Next, the operation of the present embodiment will be described.

As in the first embodiment, when the door insert 48 is opened when the airbag body is deployed, also in the present embodiment, the parting line 14 between the upper skin 16 and the lower skin 18 corresponds to the airbag door 10A. Of the upper skin 1
It breaks along the parting line 14 between 6 and the lower skin 18.

Further, in the present embodiment, based on the extension line L of the door part vertical tear line 26A of the door part lateral tear line groove 24, the facing skin of the parting line groove 14 at the part 14C located outside the door. Are joined to each other in a region of a predetermined width W by welding, bonding, or the like to form a joint 53, which provides a difference between the tear resistance of the door portion side tear line groove 24 and the tear resistance of the portion 14C in the parting line groove 14. Therefore, when the door insert 48 is deployed, stress concentrates on this boundary portion, and the tearing of the skin 12 is caused by the line groove 1 which is cut off from the door portion side tear line groove 24.
4, the door portion vertical tear line 26A is easily torn. As a result, the airbag door portion 10 has a simple configuration in which only a part of the parting line groove 14 is joined.
A can be deployed early, and the deployment performance of the airbag bag body 38 can be secured.

Further, in the present embodiment, the door portion side tear line groove 24 is provided with two-tone upper skin 16 and lower skin 1.
8, the appearance quality is good because the deterioration of the appearance quality due to the door part side tear line groove 24 and the parting line 14 can be suppressed.

Next, a third embodiment of the instrument panel of the present invention having an airbag door unit will be described in detail with reference to FIG.

Note that the same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 7, in this embodiment, the door portion vertical tear line 26 of the door portion horizontal tear line groove 24 is provided.
A discontinuous portion 54 between the parting line 14 and the door side tear line groove 24 is formed in a region of a predetermined width S in a region located outside the door with respect to the extension line L of A, A difference is provided between the tear resistance of the tear line groove 24 and the tear resistance of the discontinuous portion 54. Therefore, when the door insert 48 is deployed, stress concentrates on this boundary portion, and the tearing of the skin 12 is caused by the door portion side tear line groove 2.
4 does not spread to the parting line groove 14, so that the door portion vertical tear line 26A is easily broken.

Next, the operation of the present embodiment will be described.

As in the first embodiment, when the door insert 48 is opened when the airbag bag is deployed, also in this embodiment, the parting line 14 between the upper skin 16 and the lower skin 18 corresponds to the airbag door 10A. Of the upper skin 1
It breaks along the parting line 14 between 6 and the lower skin 18.

In the present embodiment, the parting line 14 in the region of the predetermined width S is located outside the door with reference to the extension line L of the door part vertical tear line 26A of the door part lateral tear line groove 24. And a discontinuity 54 between the door part lateral tear line groove 24 and the tear resistance of the door part lateral tear line groove 24 and the discontinuity 54 are formed. ,
Stress concentrates on this boundary portion, so that the tearing of the skin 12 does not spread from the door portion side tear line groove 24 to the parting line groove 14, and the door portion vertical tear line 26A is easily torn accordingly. As a result, with a simple configuration in which only a part of the parting line groove 14 is joined, the airbag door portion 10A can be deployed early, and the deployment performance of the airbag bag body 38 can be secured.

Further, in this embodiment, the door portion side tear line groove 24 is provided with two-tone upper skin 16 and lower skin 1.
8, the appearance quality is good because the deterioration of the appearance quality due to the door part side tear line groove 24 and the parting line 14 can be suppressed.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are within the scope of the present invention. It is clear to a person skilled in the art that is possible.

[0044]

According to the first aspect of the present invention, the instrument panel having the airbag door unit integrally has an excellent effect that the deployment performance of the airbag body can be secured without impairing the appearance. Have.

The instrument panel according to the second aspect of the present invention is excellent in that the deployment performance of the airbag bag body can be ensured with a simple structure without impairing the appearance. Has an effect.

The instrument panel according to the third aspect of the present invention, which has the airbag door unit integrally, is excellent in that the deployment performance of the airbag bag body can be secured with a simple structure without impairing the appearance. Has an effect.

The instrument panel according to the present invention, which has the airbag door unit integrally, is excellent in that the deployment performance of the airbag bag body can be secured with a simple structure without impairing the appearance. Has an effect.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing a main part of an instrument panel integrally including an airbag door according to a first embodiment of the present invention, as viewed obliquely from the rear of a vehicle.

FIG. 2 is a perspective view of the entire instrument panel integrally including an airbag door portion according to the embodiment of the present invention, as viewed obliquely from the rear of the vehicle.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is an enlarged perspective view showing a main part of an instrument panel integrally including an airbag door according to a modification of the first embodiment of the present invention, as viewed obliquely from the rear of the vehicle.

FIG. 5 is an enlarged perspective view showing a main part of an instrument panel integrally including an airbag door according to another modification of the first embodiment of the present invention, as viewed obliquely from the rear of the vehicle.

FIG. 6 is an enlarged perspective view showing a main part of an instrument panel integrally including an airbag door according to a second embodiment of the present invention, as viewed obliquely from the rear of the vehicle.

FIG. 7 is an enlarged perspective view showing a main part of an instrument panel integrally including an airbag door according to a third embodiment of the present invention, as viewed obliquely from the rear of the vehicle.

FIG. 8 is a schematic side sectional view showing an instrument panel integrally having an airbag door portion according to a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Instrument panel 10A Airbag door part of instrument panel 12 Skin 14 Upper and lower color parting line 15 Foam layer 16 Upper skin 18 Lower skin 24 Airbag door part side tear line groove 26A Airbag door part vertical tear line 53 Joining of skin Part 54 Non-continuous part of epidermis

Claims (4)

[Claims] 1. An instrument panel of a foam type having a foam layer between a skin and a base material and integrally having an airbag door portion, wherein a parting line groove formed along a color parting line of the skin is provided. , The airbag door portion side tear line groove,
The airbag door portion is made continuous with each other, and a difference is provided between the tearing resistance of the lateral tear line groove of the airbag door portion and the tearing resistance of the parting line groove. Ment panel. 2. The depth of the parting line groove adjacent to the lateral tear line groove of the airbag door portion is different from the extension line of the vertical tear line of the airbag door portion. Instrument panel with integrated airbag door section. 3. An instrument panel of a foam type having a foam layer between a skin and a base material and integrally having an airbag door portion, wherein a parting line groove formed along a color parting line of the skin is provided. , The airbag door portion side tear line groove,
Airbags, wherein the facing skins of the parting line grooves located on the outside of the airbag door are joined to each other with the airbag door portion vertical tier line extension line as a reference. Instrument panel with integrated door. 4. An instrument panel which is of a foam type having a foam layer between a skin and a base material and integrally has an airbag door portion, wherein a parting line groove formed along a color parting line of the skin is provided. , The airbag door portion side tear line groove,
Wherein the parting line groove and the airbag door portion side tear line groove are not continuous with each other.