JP2002145000A - Tearing structure of air bag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid occurrence of a secondary accident by securing safety of occupant(s) when an air bag device goes in effect. SOLUTION: The corner parts 13b, 13b of a first door panel part 13 formed at the intersection of a central tear expected line 15 with side-edge tear expected lines 16a and 17a are formed in non-acute shape, which secures safety of an occupant satisfactorily even if the occupant collides with the door panel part 13 when it makes opening displacement to the side with the seat. The corner parts 13b, 13b are rounded by extending the end part 35 of the central tear expected part 15 in the shape of curved line, and thereby the non-acute shape is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag door tearing structure, and more particularly, to a center tearing line provided along a boundary line between two door panels provided on a vehicle interior member. A scheduled tearing line provided along each side edge line of the door panel portion, and the airbag which has started inflating presses the respective door panel portion from the inner side and the scheduled tearing line and the scheduled tearing side edge. The present invention relates to an airbag door tearing structure in which the first door panel is opened to the occupant's seat and the second door panel is opened to the side opposite to the occupant's seat by breaking each line. .

[0002]

2. Description of the Related Art In recent years, most passenger cars are equipped with an airbag device for a driver's seat and an airbag device for a passenger's seat as standard in order to protect an occupant from an impact due to a collision or the like. . Among them, the airbag device for the passenger seat is installed in a state in which it is stored inside the front of the passenger seat in the instrument panel 10 as a vehicle interior member assembled in front of the passenger compartment 30 as shown in FIGS. Have been. For this reason, on the panel base material 11 of the instrument panel 10, an airbag door 12 that is opened and displaced toward the occupant compartment 30 is separately mounted or integrally formed at a portion corresponding to the airbag device 31 for the passenger seat, When the door 12 is opened from the panel base material 11, the door 12 opens to the occupant compartment 30 and defines an airbag insertion port 20 which allows the passage of the airbag 32. That is, the airbag device 31 senses the impact due to the collision.
When the airbag 32 operates, the inflated airbag 32 pushes up the airbag door 12 from the inside, and deploys into the occupant compartment 30 through the airbag insertion opening 20 defined by the airbag 32 (FIG. 9 ( c)).

Conventionally, the airbag door 12 is formed and mounted separately from the panel base material 11 of the instrument panel 10, but recently, the panel base material 11 has been used. There are many things that are integrally formed on the wing. That is, the airbag door 12
The design surface is always configured as a part of the panel base material 11, and when the airbag device 31 receives the pressing force of the inflating airbag 32 when the airbag device 31 is activated, the panel base material 11 is previously formed. By breaking at the provided scheduled cleavage line, the substrate is separated from the base material 11 and allowed to open.
In addition, as a form of the airbag door 12, for example, there are a single opening type having one door panel portion and a double opening type (shown) having two door panel portions 13, 14, and the like. , 1/10 from the start of expansion to the completion of expansion
It is important that the smooth deployment of the airbag 32, which is about 0 seconds, is not prevented.

Here, in the case of the double-opening airbag door 12, each of the door panel portions 13 and 14 has a substantially horizontally long rectangular shape, and it is assumed that the door panel portions 13 and 14 are opened from the panel base material 11. To allow, as shown in FIGS. 8 and 9 (a), at least the center cleave line 15 provided along the boundary line between both door panel portions 13, 14 and the left edge of both door panel portions 13, 14 Lines 16 and 17 (side edges of the first panel portion 13 are 16a,
17a, the side edge portions of the second panel portion 14 are 16b, 17b
). Further, in the airbag door in which the respective door panel portions 13 and 14 are completely separated from the panel base member 11 and then opened, the airbag doors are provided continuously at the ends of the scheduled splitting lines 16 and 17 on both side edges and the central splitting line. A scheduled leading edge cleavage line 18 and a scheduled trailing edge cleavage line 19 parallel to 15 are additionally formed. In any case, in the double-opening airbag door 12, when the inflated airbag 32 presses the respective door panel portions 13 and 14 from the inside, the central cleavage scheduled line 15 and the side edge When the scheduled cleavage lines 16 (16a, 16b) and 17 (17a and 17b) are broken, the first door panel portion 13 is opened to the passenger seat side and the second door panel portion 14 is moved to the front glass side. (Fig. 7).

Further, since the panel base material 11 integrally forming the airbag door 12 is generally made of a synthetic resin such as polypropylene, the instantaneous pressing force of the airbag 32 can be reduced particularly at low temperatures. If received, the panel substrate 11 itself including the airbag door 12 may be greatly damaged by the strong impact. Therefore, around the airbag door 12 on the back side of the panel base material 11, in order to prevent breakage and scattering of the airbag door 12, etc.
For example, measures are taken to increase the strength by caulking a metal door reinforcing member 21. This door reinforcing member 2
As shown in FIG. 8, 1 is a rectangular cylindrical fixing bracket (reinforcement member) 22 which is fixed so as to surround the outer edges of the first and second door panel portions 13 and 14; Movable brackets 23 are mounted inside the opening so as to face each other. First
The movable brackets 23, 23 corresponding to the second door panel sections 13, 14 are fixed support panels 26 welded or screwed to the cylindrical body 24 of the fixed bracket 22.
And a movable reinforcing panel 27 which is crimped and joined to the back surfaces of the corresponding door panel portions 13 and 14, and connects the fixed support panel 26 and the movable reinforcing panel 27 in a semi-circular shape capable of extending and deforming linearly. And a variable connection portion 28.

In the panel substrate 11 on which the door reinforcing member 21 is mounted, the door panel portions 13 and 14 of the airbag door 12 and the outer peripheral portion of the airbag door 12 are reinforced and the airbag 32 is inflated. Is given enough strength to withstand the intense pressing force of Accordingly, as shown in FIG. 9A, when the airbag 32 presses the movable reinforcing panel 27, first, as shown in FIG.
As shown in (b), the expected side edge cleavage line 16 (16a, 16
b), 17 (17a, 17b), the scheduled leading-edge cleavage line 18 and the scheduled trailing-edge cleavage line 19 are respectively broken, and
The door panels 13 and 14 float from the panel base 11 under the extension deformation of FIG. Next, as shown in FIG. 9C, the central cleavage line 15 is broken and the first and second
The door panel portions 13 and 14 are displaced in a double-opening manner toward the passenger seat and the windshield.

[0007]

In the conventional double-opening airbag door 12, as shown in FIGS. 8 and 9 (a), the central cleavage line 15 and the left and right side edge cleavage lines 16, 17 were connected at substantially right angles. For this reason,
The scheduled center cleavage line 15 and the scheduled side edge cleavage line 16,1
In the first and second door panel portions 13 and 14 formed by breaking 7, the corner portions 13 b and 14 b at the open free ends 13 a and 14 a along the central cleavage line 15 are
It had a sharp edge with a sharp edge. For this reason,
If the occupant's head or the like thrown forward collides with the corners 13b, 13b of the first door panel portion 13 which is displaced toward the occupant's seat, the degree of injury increases and The problem causing the next disaster was inherent.

The scheduled side edge cleavage lines 16 and 17 are formed along the inner opening edge 29 of the fixing bracket 22 in the door reinforcing member 21 to open the first and second door panel portions 13 and 14. Edge 20a of the airbag insertion opening 20 formed in the panel base material 11
As shown in FIG. 9C and FIG. 10, the front face is substantially coincident with the inner opening edge 29 of the fixing bracket 22. For this reason, the airbag 32 inflating and deploying to the passenger compartment 30 through the inner opening edge 29 and the airbag insertion port 20 may come into contact with the breaking edge 20a and be rubbed or caught. There was also a disadvantage that the airbag 32 was torn and the original shock absorbing performance was hindered.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problem suitably. By forming a corner portion of a first door panel portion which is displaced toward a passenger seat in a non-sharp shape, While ensuring the safety of the occupant and avoiding the occurrence of a secondary disaster, the broken edge of the airbag insertion opening formed in the vehicle interior member is located at the inner opening edge of the reinforcing member disposed on the back side of the vehicle interior member. An object of the present invention is to provide an airbag door tearing structure configured to prevent the airbag from being broken by preventing the airbag from coming in.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the intended object, the present invention provides a center cleave provided along a boundary line between two door panels provided on a vehicle interior member. A line, and a scheduled side edge tear line provided along a side edge line of both door panel portions, and the airbag that has started inflating presses the respective door panel portion from the inside and the central scheduled tear line and An airbag door tearing structure in which the first door panel portion is opened to the occupant seat side and the second door panel portion is opened to the opposite side of the occupant seat by breaking the respective scheduled side edge tear lines. In the above, when the corner portion of the first door panel portion formed at the intersection of the planned center cleavage line and the planned side edge cleavage line is formed in a non-sharp shape, the first door panel portion is displaced in an open state. Characterized by being configured to be secured to occupant safety.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an airbag door opening structure according to the present invention. In this embodiment, FIG.
As shown in FIGS. 9 to 9, 2 provided on a panel base material 11 of an instrument panel 10 as a vehicle interior member.
Double door type comprising two door panel sections 13 and 14, having a door reinforcing member 21 on the back side, and each door panel section 1
An example of an airbag door 12 that opens in a double-opening manner after the members 3 and 14 are completely separated from the panel base material 11 is illustrated.
Therefore, in the section of the prior art described with reference to FIGS. 7 to 10, the same members as those already described are denoted by the same reference numerals.

FIG. 1 is a schematic plan view of an airbag door in which the tearing structure of the present embodiment is implemented. In the tearing structure of the airbag door, the airbag door is provided on the panel base 11 of the instrument panel 10. Door panels 13 and 14
Central cleavage line 15 provided along the boundary line in
And scheduled side edge cleavage lines 16,1 provided along the left edge line and the right edge line of both door panel portions 13,14, respectively.
7 (side edge portions of the first panel portion 13 are 16a and 17a, and side edge portions of the second panel portion 14 are 16b and 17b);
An expected front edge cleavage line 18 provided along a front edge line of the first door panel portion 13;
And a scheduled trailing edge cleavage line 19 provided along the trailing edge line. Thereby, when the airbag 32 which has started to inflate by the operation of the airbag device 31 presses the respective door panel portions 13 and 14 from the inside, the central cleavage line 15 and the side edge cleavage lines 16 ( 16a, 16
b), 17 (17a, 17b), the expected front-edge cleavage line 18 and the expected rear-edge cleavage line 19 are respectively broken, so that the first door panel portion 13 is opened to the occupant's seat side and the second door panel is opened. The part 14 is open to the side opposite to the passenger seat (the side of the windshield).

On the back side of the panel substrate 11, a door reinforcing member 21 identical to that shown in FIG. 8 is fixed by caulking to prevent breakage and scattering of the airbag door 12. Have been. The fixing bracket 22 of the door reinforcing member 21 is connected to the airbag device 20.
And a fastening plate portion 25 integrally formed with the tubular body portion 24 and caulked to the back side of the panel base material 11. An inner opening edge 29 aligned with the cylindrical portion 24 is formed.
On the other hand, each movable bracket 23, 23 corresponding to the first and second door panel portions 13, 14, respectively, includes a fixed support panel 26, which is welded or screwed to the cylindrical body 24 of the fixed bracket 22, and a corresponding door panel. A movable reinforcing panel 27 which is crimped and joined to the back surfaces of the portions 13 and 14, and a variable connecting portion 28 which has a semi-circular shape capable of extending and deforming linearly and connects the fixed support panel 26 and the movable reinforcing panel 27; It is composed of

In the cleavage structure of the embodiment, the left and right end portions 35, 35 on the central cleavage line 15 are provided.
Is formed so as to be deviated toward the first door panel portion 13 and connected to the expected side edge cleavage lines 16a, 17a formed along the side edge line of the door panel portion 13, respectively. is there. That is, the terminal portions 35, 35 are formed to extend in a circular arc shape, and the open free ends of the first door panel portion 13 formed at the intersections of the scheduled center cleavage line 15 and the scheduled side edge cleavage lines 16a, 17a. The corner portions 13b, 13b of 13a are formed in a non-sharp shape with a round shape by the terminal portions 35, 35.

Further, the expected side edge cleavage line 16b, 1 formed along the side edge line of the second door panel portion 14.
7b, each terminal portion 40, 40 is formed so as to extend toward the second door panel portion 14 side, and is connected to a substantially middle portion of the terminal portion 35, 35 of the central cleavage line 15 at the center. is there. That is, the respective terminal portions 40,
An open free end 14a of the second door panel portion 14 formed at the intersection of the scheduled center cleavage line 15 and the scheduled side edge cleavage lines 16b and 17b is formed in an arc shape.
Are formed in a non-sharp shape with a rounded shape by the terminal portions 40, 40. Then, the joining angle α of the terminal portions 40, 40 of the scheduled side edge cleavage lines 16b, 17b with respect to the terminal portions 35, 35 of the central cleavage line 15 is set in a range of 60 to 120 degrees. Corner 14, b
The protrusion amount of 14b is reduced, and the strength is not reduced. However, if the joining angle α is set to 90 degrees, the corner 14 b of the second door panel 14 and the panel base 1
Since the strength of the triangular remaining portion becomes substantially the same, it is desirable to set as such if possible. In addition, the said terminal parts 40 and 40 may be made to connect in a straight line part of the central cleavage line 15 and the joining part of the said terminal parts 35 and 35.

Further, the expected side edge cleavage line 16 (16a, 1
6b) and 17 (17a and 17b) are, as shown in FIGS. 1, 3 and 5, from the inner opening edge 29 of the fixing bracket 22 disposed on the back side of the panel base material 11 by a required amount. It is formed in a position deviated to. Therefore, the opening edge 20a of the airbag insertion opening 20 formed in the panel base 11 by opening the first and second door panel portions 13 and 14 does not face the inner opening edge 29. . In particular, in the cleavage structure of the embodiment, the terminal portions 35 and 35 and the terminal portions 40 and
Due to 40, a protruding edge (broken edge) 20b protruding in a triangular shape is formed at an intermediate portion of the fractured edge 20a, but the expected side edge cleavage lines 16 and 17 are provided at the aforementioned positions. Thus, the interval W is secured between the protruding edge 20b and the inner opening edge 29, so that the protruding edge 20b does not protrude from the inner opening edge 29. Therefore, as shown in FIG. 4, the airbag 32 that expands through the airbag insertion port 20 does not contact the broken edge 20a and the protruding edge 20b of the airbag insertion port 20.

[0017]

Next, the operation of the air bag door tearing structure according to the present embodiment having the above-described structure will be described.

When the airbag 32, which has started inflating by the operation of the airbag device 31, presses the airbag door 12, first, the scheduled side edge cleavage lines 16 and 17 and the leading edge cleavage line 1
8 and the expected rear edge cleavage line 19 break at substantially the same time, and the door panel portions 13 and 14 are completely separated from the panel base material 11. When the airbag 32 is further inflated, each of the variable connecting portions 28 of the door reinforcing member 21 is linearly extended and deformed, and the door panel portions 13 and 14 are integrally floated from the panel base material 11. Further, the airbag 32
When the pressing force increases due to the expansion of the opening, the central cleavage line 15 is finally broken, and the first and second door panel portions 13, 1 are finally broken.
As shown in FIG. 2, the door panels 13 and 14 are displaced in a double-opening manner with the movable connecting portion 28 as a hinge point.

Here, in the first door panel portion 13 which is opened and displaced toward the occupant seat, the corner portions 13b and 13b of the free open end 13a have a round shape. Does not have a sharp shape. Therefore, the first door panel portion 1 that is opened and displaced to the side of the passenger seat
Even if the occupant's head or the like thrown forward collides with the corner portions 13b, 13b in 3, the safety of the occupant is ensured and the occurrence of a secondary disaster is preferably avoided.

Further, in the second door panel portion 14 which is opened and displaced to the side opposite to the passenger seat (the windshield side), since the corner portions 14b and 14b of the free open end 14a have a round shape, this portion is formed. Does not decrease in strength. Therefore, when the expected side edge cleavage lines 16 and 17 are broken, the corners 14b and 14b do not break apart from the second door panel portion 14 and scatter as fragments, so that the fragments collide with the occupant. The occurrence of a secondary disaster due to the above is preferably avoided.

The break edge 20a and the protruding edge 20b of the airbag insertion opening 20 formed in the panel base 11 by opening the first and second door panel portions 13 and 14 are connected to the door reinforcing member 21. 4 does not face the inner opening edge 29 of the fixing bracket 22 in FIG.
As shown in FIG. 5, the airbag 32 inflating through the airbag insertion opening 20 does not come into contact with the breaking edge 20a or the protruding edge 20b and is not rubbed or caught. Therefore, breakage of the airbag 32 due to contact with the breaking edge 20a or the protruding edge 20b is suitably prevented,
The impact absorbing performance of the airbag 32 is not hindered.

[0022]

[Modification] FIG. 6 is a plan view of a main portion showing a cleavage structure of an airbag door according to a modification.
5 of the first door panel 1
3 to extend in such a manner as to be deviated in an inclined straight line (approximately 45 degrees) to the side of the door panel portion 13 and to be connected to the expected side edge cleavage line 16a (17a) formed along the side edge line of the door panel portion 13. It was set up. As a result, each corner 13b of the open free end 13a of the first door panel 13 formed at the intersection of the scheduled center cleavage line 15 and the scheduled side edge cleavage line 16a (17a) is formed by the terminal portions 35, 35. It is formed in a non-sharp shape with an obtuse taper. Further, each terminal portion 40 (40) at the expected side edge cleavage line 16b (17b) forming the second door panel portion 14
Is inclined straight toward the second door panel portion 14 (about 4
It is formed so as to extend so as to deviate at an inclination of 5 degrees, and is connected to a substantially middle portion of the end portions 35, 35 of the central cleavage line 15. As a result, the corner portion 14b of the open free end 14a of the second door panel portion 14 formed at the intersection of the planned central cleavage line 15 and the planned side edge cleavage line 16b (17b) is obtuse by the terminal portions 40, 40. The taper is formed in a non-sharp shape. And
The end portions 40, 40 of the expected side edge cleavage lines 16b, 17b with respect to the end portions 35, 35 of the central cleavage line 15
Is set in the range of 60 to 120 degrees.
However, when the joining angle α is set to 90 degrees, the strength of the corner portion 14b of the second door panel portion 14 and the strength of the triangular remaining portion of the panel base material 11 become substantially the same. In addition, the said terminal parts 40 and 40 may be made to connect in a continuous part of the straight line of the central cleavage line 15 and the joining parts of the said terminal parts 35 and 35.

In the airbag door tearing structure of this modified example, the first door panel portion 13 which is opened and displaced toward the occupant's seat has a corner portion 13 of the free open end 13a.
Since b and 13b have an obtuse tapered shape and do not have a sharp shape at a portion facing the occupant's seat side, occupant safety can be ensured. Further, in the second door panel portion 14 which is displaced to the side opposite to the occupant seat (the windshield side), the corner portions 14b, 14b of the open free end 14a are formed in an obtuse tapered shape, so that there is no strength reduction. In addition, the occurrence of a secondary disaster caused by the corners 14b, 14b being broken and separated and scattered as fragments can be suitably avoided, and the safety of the occupant can be ensured.

Also in the modified example, the panel substrate 1
The expected side edge cleavage lines 16 (16a, 16b) and 17 (17a, 17b) are formed at positions deviated outward by a required amount from the inner opening edge 29 of the fixed bracket 22 disposed on the back side of the bracket 1. From the protruding edge 20b and the inner opening edge 29.
, The interval W is ensured, and the protruding edge 20 b does not protrude from the inner opening edge 29. Therefore, the first and second
Of the panel base material 11 by opening the door panel portions 13 and 14 of FIG.
Since the break edge 20a and the protruding edge 20b of the airbag insertion port 20 formed in the above-mentioned manner do not reach the inner opening edge 29, the inconvenience of the airbag 32 being torn can be avoided. .

In the above embodiment, the side edge cleavage line 1
6, 17 and the expected leading edge cleavage line 18 and the expected trailing edge cleavage line 1
9 is broken and the door panel portions 13 and 14 are
After completely separating the airbag door 12 from the airbag door 12, the central cleavage line 15 is broken and the door panels 13 and 14 are opened in a double-opening manner. It is not limited to a simple open form. For example, an airbag door that does not have the leading edge tearing line 18 and the trailing edge tearing line 19, that is, a hinge line is provided at these scheduled lines 18 and 19, and when the airbag 32 is pressed, the center is opened. After the scheduled cleavage line 15 and the scheduled side edge cleavage lines 16 and 17 are simultaneously split, the both door panel portions 13 and 14 are opened and displaced in a double-opening manner around the hinge line while being joined to the panel base material 11. Also covers airbag doors.

In the above-described embodiment, the instrument panel 10 is exemplified as a vehicle interior member.
The airbag door is not limited to the one provided at 0, and may be, for example, an airbag door for a side airbag provided on a door trim, an airbag door for a curtain airbag provided on a pillar garnish, or the like.

[0027]

As described above, according to the airbag door tearing structure of the present invention, the corner portion is formed in a non-sharp shape in the first door panel which is displaced toward the occupant's seat. This has a beneficial effect of ensuring the safety of the occupant. In addition, the non-sharp shape of the corner portion is formed by adding a round or by adding an obtuse taper. Further, in the second door panel portion which is displaced to the side opposite to the occupant seat, the corner portion is formed in a non-sharp shape, so that the corner portion is prevented from being separated and scattered as fragments. , Can ensure the safety of the occupants. Further, the broken edge of the airbag insertion opening formed in the vehicle interior member due to the opening of the first and second door panel portions does not face the inside opening edge of the reinforcing member disposed on the back side of the vehicle interior member. Therefore, there is also an advantage that tearing of the airbag inflating through the airbag insertion opening is suitably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing first and second door panels in an airbag door employing a cleavage structure according to an embodiment.

FIG. 2 is a diagram showing a state in which corners of free open ends of both door panel portions are non-open when the first door panel portion is displaced to the side of the passenger seat and the second door panel portion is displaced to the opposite side to the passenger seat; It is a schematic perspective view showing that it is formed in a sharp shape.

FIG. 3 is a perspective view, partially broken away, of each terminal portion of the scheduled cleavage line and the scheduled side edge cleavage line that constitute the cleavage structure of the embodiment.

FIG. 4 is a cross-sectional view showing that the inflating airbag does not contact the broken edge because the broken edge of the airbag insertion opening formed in the panel base does not face the inner opening edge of the fixing bracket. It is.

FIG. 5 is a plan view showing respective end portions of a central cleavage line and a side edge cleavage line in the embodiment, and a door reinforcing member disposed on the back side of the panel base material.

FIG. 6 is a plan view showing each terminal portion of a planned center cleave line and a planned side edge cleave line in a modified example, and a door reinforcing member disposed on the back side of the panel base material.

FIG. 7 is a side sectional view of an instrument panel provided with an airbag door.

FIG. 8 is a perspective view showing a door panel portion formed on a panel substrate of the instrument panel and a door reinforcing member disposed on the back side thereof, with the panel substrate partially cut away.

9A and 9B are explanatory diagrams of an opening process of the airbag door by pressing the airbag, wherein FIG. 9A shows a state before the opening of the airbag door, and FIG. The expected tear line and the trailing edge tear line are broken and the door panel part is separated from the panel base material, and shows a state in which the center tear line is broken and the first door panel part is located in the passenger seat. This shows a state where the second door panel portion is displaced to the side and the second door panel portion is displaced to the opposite side to the occupant seat, and the corners at the open free ends of both door panel portions are formed in a sharp shape.

FIG. 10 is a cross-sectional view of an airbag inflating through the airbag insertion port when a broken edge of the airbag insertion port formed in the panel base material is aligned with the inner opening edge of the fixing bracket. It is sectional drawing which shows the inconvenience which contacts a fracture | rupture edge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Instrument panel (vehicle interior member) 13 First door panel part 13b Corner part 14 Second door panel part 14b Corner part 15 Expected center cleave line 16a, 16b Expected line cleave line 17a, 17b Expected line cleave line 20 Air Bag insertion opening 20a Breaking edge 20b Projecting edge (breaking edge) 22 Fixing bracket (reinforcing member) 29 Inner opening edge 32 Airbag

Claims (5)

[Claims] 1. A center tear line (15) provided along a boundary line between two door panel portions (13, 14) provided on a vehicle interior member (10), and a door panel portion (13, 14). Expected side edge cleavage lines (16a, 17a, 16b, 17
b), the inflated airbag (32) presses the respective door panel portions (13, 14) from the inside, and the central cleavage line (15) and the side edge cleavage line (16a, 17a, 16b, 17b)
Respectively, so that the first door panel portion (13)
To the passenger seat and the second door panel (1
4) is opened to the side opposite to the occupant's seat, in the airbag door rupture structure, the center cleave line (15) and the side edge cleave line (16a, 17)
The first door panel portion (13) formed at the intersection of (a).
The corner portions (13b, 13b) of the airbag door are formed in a non-sharp shape so as to secure the safety of the occupant when the first door panel portion (13) is displaced open. Cleavage structure. 2. The airbag door tearing structure according to claim 1, wherein the corner portions (13b, 13b) are rounded to have a non-sharp shape. 3. The airbag door tearing structure according to claim 1, wherein the corner portions (13b, 13b) are tapered at an obtuse angle to form a non-sharp shape. 4. The corner portion (14b, 14b) of the second door panel portion (14) formed at the intersection of the planned central cleavage line (15) and the planned side edge cleavage line (16b, 17b). The airbag door tearing structure according to any one of claims 1 to 3, which is formed in a sharp shape. 5. The expected side edge cleavage line (16a, 16b, 17a, 17b)
A reinforcing member (2) disposed on the back side of the vehicle interior member (10).
The first and second door panel portions (13, 14) are formed at positions deviated outward by a required amount from the inner opening edge (29) of (2).
The break edges (20a, 20b) of the airbag insertion port (20) formed in the vehicle interior member (10) by opening the
The airbag door tearing structure according to any one of claims 1 to 4, wherein the airbag door is configured so as not to meet (9).