JP2002220019A - Structure for opening airbag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a door panel part which is opened by the pressure of an airbag from being ruptured and separated at hinge parts and scattered as it is opening. SOLUTION: A rupturing portion 38 is provided in the portion of a support frame part 28 adjacent to the hinge parts 32; if an excessive stress is applied to the hinge parts 32 during the process of opening the door panel parts 26 and 26, the rupturing portion 38 is ruptured to separate the door panel parts 26 and 26 from the support frame part 28. The door panel parts 26 and 26 separated from the support frame part 28 are supported by the outer edge wall 24 of a surface cover part 22 located on the outer edge of the support frame part 28 to prevent scattering of the door panel parts 26 and 26. The rupturing portion 38 comprises, e.g. a grooved portion 40 formed as a thin-walled portion in the support frame part 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening structure of an airbag door, and more particularly, to a surface cover portion which is fixed to a mounting portion provided on a vehicle interior member so as to be difficult to separate from the mounting portion. A door panel portion formed integrally and defined by a linear portion to be cleaved and a hinge portion, and a door panel portion integrally formed on the back side of the front cover portion to surround the door panel portion and be fixed to the airbag device. The present invention relates to an open structure of an airbag door including a support frame portion.

[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. . The airbag device for the driver's seat is generally mounted on a horn pad portion at the center of the steering. The airbag device for the passenger's seat is assembled in front of the passenger compartment 17 as shown in FIG. 15, for example. It 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. For this reason, the panel substrate 1 of the instrument panel 10
In FIG. 1, an airbag door 20 which is displaced toward the passenger compartment 17 at a position corresponding to the airbag device 14 for the passenger seat.
The door panel portions 26, 26 of the door 20 are opened to open to the occupant compartment 17 to define an opening through which the airbag 16 can pass. That is, when the airbag device 14 is actuated by sensing the impact of the collision, the inflated airbag 16 pushes up the door panel portions 26, 26 from the inside to open to the occupant compartment 17, and is thereby defined. The vehicle is deployed into the occupant compartment 17 through the opening.

[0005] The airbag door 20 shown in FIG. 15 is formed separately from the panel substrate 11 of the instrument panel 10, and is retrofitted to the panel substrate 11. As shown in FIG. 16, the airbag door 20 includes a synthetic resin surface cover portion 22 that is difficult to separate from a mounting hole 12 as a mounting portion provided in the panel base material 11, Formed integrally with the part 22;
A double-sided door panel portion 26, 26 defined by a line-shaped scheduled tearing portion 30 and a hinge portion 32, and integrally formed on the back side of the front cover portion 22 to surround the door panel portion 26, 26; And a support frame portion 28 which is locked and fixed to the airbag device 14. The front cover portion 22 has a plurality of hook-shaped hooks 34 to be hooked to the panel substrate 11, while the support frame portion 28 has a case 15 of the airbag device 14. A locking hole 36 is formed to be locked to the hole.

[0004] In such an airbag door 20, the airbag device 14 is actuated and the inflated airbag 1 is started.
6 presses the door panel portions 26, 26 from the inside, thereby breaking the scheduled tearing portion 30 and the hinge portion 32.
, Each door panel portion 26, 26 is opened and displaced outward. At this time, the door panel portions 26, 26 which are opened outward around the hinge portion 32,
It is supported by the support frame 28 fixed to the airbag device 14 via the hinge 32.
The airbag door 20 is integrally formed of, for example, a polystyrene-based or polypropylene-based elastomer so that the door panel portions 26, 26 are not broken and scattered even when the pressing force of the airbag 16 is applied at a low temperature or a high temperature. .

[0005]

When the airbag door 20 is mounted on the panel substrate 11 of the instrument panel 10, the front cover portion 22 is entirely exposed to the passenger compartment 17 side. I have. Therefore, the airbag door 20 is required to have a texture equivalent to that of the instrument panel 10 and to be provided at a position where the occupant can come in contact with, so that it is necessary to secure an appropriate rigidity. It is desirable to form the above-mentioned high-rigidity elastomer (the general portion of the panel substrate 11 has a flexural modulus of 2000 MPa or more). However, when the airbag door 20 is formed from a highly rigid elastomer, the door panel portions 26, 26 are almost flexed when the door panel portions 26, 26 are displaced outwardly by the pressing force of the airbag 16. As the bending deformation does not occur, stress tends to concentrate on the hinge portion 32, and excessive stress is applied to the hinge portion 32 as shown in FIG. Accordingly, in some cases, as shown in FIG. 18, the door panel portions 26, 26 and the support frame portion 28 are completely broken and separated at the hinge portion 32, and the separated door panel portions 26, 26 are scattered to the occupant side. And fear of causing a secondary disaster.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problem suitably, and it is proposed that a door panel, which is opened by the pressing force of an airbag, breaks and separates at a hinge part in the middle of the opening and scatters. It is an object of the present invention to provide an airbag door opening structure configured to prevent the airbag door from opening.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the intended object, the present invention provides a front cover portion which is fixed to a mounting portion provided on a vehicle interior member so as to be difficult to separate. A door panel portion formed integrally with the front cover portion and defined by the linear portion to be cleaved and the hinge portion; and an airbag integrally formed on the back side of the front cover portion and surrounding the door panel portion. The door panel portion comprising a support frame portion fixed to the device, the inflated airbag presses the door panel portion from the inside to break the scheduled tearing portion, and opens along the hinge portion. In the opening structure of an airbag door configured to be supported by the support frame portion via the hinge portion, the door panel portion opens to a portion of the support frame portion adjacent to the hinge portion. When an excessive stress is applied to the hinge portion, a breakable portion for separating the door panel portion and the support frame portion is provided, and the door panel portion separated from the support frame portion is attached to the support frame portion. The front panel is supported by the outer edge wall of the front cover located on the outer edge of the door panel, thereby preventing the door panel from scattering.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an airbag door opening structure according to the present invention. In the embodiment, the instrument panel 1 shown in FIG.
0, and the same members as those already described in the section of the prior art described with reference to FIGS.
The same reference numerals are used.

[0009]

First Embodiment FIG. 1 is a schematic perspective view of an airbag door implemented in an airbag door opening structure according to a first embodiment of the present invention as viewed from the back side, and FIG. FIG. 2 is a side sectional view of the illustrated airbag door. The airbag door 20 of the first embodiment is different from the conventional airbag door 2 shown in FIG.
The surface cover 22 is attached to the mounting hole 12 as the mounting portion provided in the panel base 11 of the instrument panel 10 so as to be difficult to separate.
Door panels 26, 26 which are formed integrally with the front cover 22 and are defined by a line-shaped scheduled tearing portion 30 and a hinge 32, and are integrally formed on the back side of the front cover 22. And a support frame portion 28 which surrounds the door panel portions 26 and 26 and is locked and fixed to the airbag device 14. The front cover portion 22 has a plurality of hook-shaped engaging hooks 34 which are engaged with the panel substrate 11, while the support frame portion 28 has a case 1 of the airbag device 14.
5 is formed with a locking hole 36 to be locked. Reference numeral 24 which forms a part of the front cover portion 22 is an outer edge wall located outside the support frame portion 28. Such an airbag door 20 is formed of a highly rigid elastomer having a flexural modulus of 600 MPa or more.

[0010] The to-be-cleaved part 30 is a double door panel part 2.
6, 26 formed along the outer edge line on the back side of the front cover portion 22 as a thin portion, which is easily broken when the pressing force of the airbag 16 is applied to the door panel portions 26, 26, A central cleavage line 30a extending along the boundary between the door panels 26, 26;
It is composed of a side edge cleavage scheduled line 30b, 30b extending along the side edge of both door panel portions 26, 26, and the whole is formed to extend substantially in an H shape. In addition, each door panel unit 2
The outer edges of the outer edge lines 6 and 26 where the to-be-cleaved portions 30 are not formed are the hinge portions 32 when the door panel portions 26 and 26 are opened. Therefore, each door panel part 26, 26 is formed into a horizontally-long rectangular shape by the part to be cleaved 30 and the hinge part 32.
As a result, the opening from the surface cover portion 22 is allowed, and the door is opened in a double-opening manner along the corresponding hinge portion 32. However, since the tearable portion 30 and the hinge portion 32 are formed on the back side of the front cover portion 22, they are not recognized from the front side of the front cover portion 22 (FIG. 4B).

In the airbag door opening structure according to the first embodiment, in the airbag door 20, a process of opening the door panel portion 26 at a portion of the support frame portion 28 adjacent to the hinge portion 32. A breakable portion 38 that breaks when an excessive stress is applied to the hinge portion 32 is provided. That is, each door panel 26
When excessive stress is applied to the hinge portion 32 in the process of opening the door, the break occurs at the break portion 38 before the hinge portion 32 breaks, and the door panel portion 26 and the support frame portion 2 are broken.
8 are separated from each other. Accordingly, it is possible to prevent the door panel portions 26, 26 from being completely separated from the front cover portion 22 by breaking at the hinge portion 32 beforehand.

The breakable portion 38 is formed as a thin portion on the inner wall surface 28a of the support frame portion 28 by a V notch (groove portion) 40 formed along the hinge portion 32 as shown in FIG. As a result, when an excessive stress is applied to the hinge portion 32, the stress is concentrated on the breakable portion 38 so that easy breakage is realized. That is, the pressing force of the airbag 16 is reduced by the door panel 26,
26, the door panel portion 26 is pressed upward and pushed up as shown by an arrow in the figure, while the support frame portion 28 locked and fixed to the case body 15 of the airbag device 14 is Therefore, the stress concentrates on the deepest corner of the V notch 40, and the portion advances obliquely upward (upper right in the drawing) as a fracture start point S.
For this reason, the inclination angle R of the fractured surface is approximately 30 to 60 degrees. Therefore, in order to locate the fracture end point E on the outer wall surface 28 b of the support frame portion 28, the deepest angle portion is spaced from the hinge portion 32 by the distance H. It is desirable to arrange the V notch 40 at a position separated by only a certain degree.

The breaking strength at the predetermined breaking portion 38 is as follows:
The breaking strength is set to be larger than the breaking strength at the cleavage scheduled portion 30. Thereby, when the pressing force of the airbag 16 is applied to the door panel portions 26, 26, the rupture starts at the rupture scheduled portion 30 first, and after the rupture at the cleavable scheduled portion 30 is completed, the rupture scheduled The breaking at the part 38 is completed. In other words, while the rupture at the to-be-cleaved portion 30 is completed and the door panel portions 26 and 26 are being opened along the hinge portion 32, the rupture at the to-be-broken portion 38 is completed and the door panel portions 26 and 26 are supported. The frame part 28 is separated.

Next, the opening structure of the airbag door according to the first embodiment employing the airbag door 20 formed as described above will be described with reference to the process of opening and displacing the door panel portions 26, 26 over time. explain. The airbag door 2
0 is the engagement hook 3 with respect to the panel base 11 in the instrument panel 10 as shown in FIG.
4 and is fixed to the case body 15 of the airbag device 14 using the locking holes 36. Thus, the front cover portion 22 covers the locking hole 36 to form a part of the instrument panel 10 and the support frame portion 28
Is aligned with the opening of the case body 15 of the airbag device 14. In addition, since the said to-be-cleaved part 30 is formed in the back side of the said front cover part 22, it is not visually recognized from the front side of this front cover part 22 (FIG.4 (b)).

Then, the airbag 16 whose inflation is started by the operation of the airbag device 14 is connected to each of the door panel portions 26 and 2.
When the airbag 16 is pressed from the inside, the airbag 16 expands in a spherical shape, and as shown in FIGS.
Breakage starts at the middle part of a. The rupture that started at the central cleavage line 30a
According to the further expansion of the center cleavage line 30a, the body proceeds to both sides of the central cleavage line 30a, and then proceeds to the side edge cleavage scheduled lines 30b, 30b. When the rupture at both the scheduled side edge cleavage lines 30b, 30b is completed, the door panels 26, 26 are supported by the support frame 28 in a cantilever state, and opening around the hinge 32 is allowed. Become so.

Accordingly, the door panels 26, 26, which are receiving the pressing force of the gradually expanding airbag 16, follow the inflation of the airbag 16 toward the passenger compartment 17 around the hinge 32. Open displacement occurs at a stretch. At this time, due to the high inflation speed of the airbag 16, the pressing force of the airbag 16 is applied to the door panel portions 26, 26 also on the hinge portion 32 side, and the stress is applied to the hinge portion 32. Will be added. When an excessive stress is applied to the hinge portion 32,
As shown in FIGS. 6A and 6B, the hinge 32
Before the rupture occurs, the rupture occurs at the rupture scheduled portion 38.

Further, when the pressing force of the airbag 16 acts on the door panel portions 26, 26, the breakable portions 3
8A and 8B, the support frame 28 and the door panel 26 locked to the case body 15 of the airbag device 14 are completely connected to each other as shown in FIGS. 7A and 7B. Become separated. Thus, the door panel portions 26, 26 separated from the support frame portion 28 are supported by the outer edge wall 24 of the front cover portion 22 located on the outer edge side of the support frame portion 28, and are further opened and displaced in this state. Become like At this time, due to the pressing force of the airbag 16, the breakage at the edges of the side edge cleavage scheduled lines 30b, 30b may be slightly extended and the hinge points may move, but the door panel portions 26, 26 It remains connected to the outer edge wall 24 of the cover part 22. That is, each door panel part 26, 26
Is not separated from the front cover part 22 even if it is completely separated from the support frame part 28,
And does not fly into the passenger compartment 17.

As described above, in the air bag door opening structure according to the first embodiment, when the door panel portions 26 are opened by the pressing force of the air bag 16, the hinge portion 3 is opened.
When excessive stress is applied to the door panel part 26,
The door panel portions 26 are prevented from being separated from each other by releasing the stress applied to the hinge portion 32 by breaking and separating the support frame portion 28 from the support frame portion 28 at the breakable portion 38. Thereby, even if the airbag door 20 is formed of a highly rigid elastomer, the door panel 2
The inconvenience of 6, 26 being separated and scattered is preferably avoided.

Further, since the breaking strength at the scheduled breaking portion 38 is set to be higher than the breaking strength at the scheduled breaking portion 30, the breaking at the scheduled breaking portion 30 is completed and the door panel portion 2 is broken.
During the opening of the doors 26, 26, the rupture at the rupture scheduled part 38 is completed, and the door panel parts 26, 26 and the support frame part 28 are separated from each other, so that the door panel parts 26, 26 are smoothly opened and displaced. .

[0020]

Second Embodiment FIG. 8 is a schematic perspective view of an airbag door used in an airbag door opening structure according to a second embodiment of the present invention as viewed from the back side, and FIG. FIG. 3 is a side cross-sectional view illustrating an embodiment in which the illustrated airbag door is engaged with a panel substrate 11 of an instrument panel 10. The airbag door 20 of the second embodiment is based on the airbag door 20 shown in the first embodiment and is modified from the first embodiment.
The door panel portions 26, 26, the support frame portion 28, and the breakable portion 38 provided on the support frame portion 28 are the same as those of the airbag door 20. Therefore, here, only the portions different from the airbag door 20 of the first embodiment will be described, and the same portions and members will be denoted by the same reference numerals and detailed description thereof will be omitted.

In the airbag door 20 of the second embodiment, the hinge portion 32 serving as a first hinge portion is provided on the back side of the outer edge wall 24 of the front cover portion 22 in correspondence with each door panel portion 26, 26. Is additionally provided with another second hinge portion 42. Further, based on the addition of the second hinge portions 42, 42, the terminal portions 30c, 30c of the respective side edge cleaved lines 30b, 30b in the cleaved portion 30 are each
The hinges 42 are formed to extend to near the ends of the hinges 42. As shown in an enlarged view in FIG. 13, in the continuous portion between the support frame portion 28 and the front cover portion 22, the side edge cleavage scheduled lines 30 b, 30 b are formed so as to extend therethrough.

The airbag door 2 formed as described above
In the opening structure of the airbag door according to the second embodiment employing the airbag device 0, when the airbag 16 that has started to inflate by operating the airbag device 14 presses the door panel portions 26, 26 from the inside, the tearable portion 30 is opened. Cleavage line 3 at
0a and both the scheduled side edge cleavage lines 30b, 30b are broken, and when the break is completed, both door panel parts 26,
26 is opened while being supported by the support frame 28 in a cantilever state (FIG. 10).

When an excessive stress is applied to the first hinge portion 32 in the process of opening the door panel portions 26, 26, the portion to be broken before the breakage at the first hinge portion 32 occurs. A break occurs at 38 (FIG. 11).
Further, the pressing force of the airbag 16 is reduced by the door panel portions 26,2.
By acting on 6, the rupture is finally completed in the entire rupture expected portion 38, and the door panel portion 26 and the support frame portion 28 are completely separated. Then, the door panel portions 26, 26 separated from the support frame portion 28 are connected to the support frame portion 2.
Outer edge wall 2 of the front cover portion 22 located on the outer edge side of the outer cover 8
4, and each side edge cleavage line 30b,
Since the terminal portions 30c of the 30b are also broken, the opening is further displaced around the second hinge portion 42 provided on the outer edge wall 24. That is, even if the door panel portions 26, 26 are completely separated from the support frame portion 28, they are not separated from the front cover portion 22, so that they do not separate from the front cover portion 22 and fly into the passenger compartment 17. .

As described above, in the air bag door opening structure according to the second embodiment, when the door panels 26 are opened by the pressing force of the air bag 16, an excessive stress is applied to the first hinge 32. At this time, the door panel portions 26, 26 and the support frame portion 28 are separated by breaking at the portion 38 to be broken, and the stress applied to the first hinge portion 32 is released. Thus, the door panel portions 26, 26 are prevented from being separated from the front cover portion 22. Then, the door panel portion 26 separated from the support frame portion 28 is more smoothly opened and displaced around the second hinge portion 42 provided on the outer edge wall 24. Thereby, even if the airbag door 20 is formed of a highly rigid elastomer, the disadvantage that the door panel portion 26 separates and scatters is suitably avoided.

The setting of the breakable portion 38 provided on the support frame portion 28 is not limited to the thickness reduction by forming the V notch 40 shown in each of the above-described embodiments. For example, as shown in FIG. The strength may be reduced by configuring the frame portion 28 with a plurality of slits 44 formed at required intervals. Even if the breakable portion 38 is formed of such a slit 44, when an excessive stress is applied to the hinge portion 32, the breakable portion 38 can be easily broken.

In each of the above embodiments, the panel substrate 11
Although the airbag door 20 is attached to the mounting hole 12 as a mounting portion provided in the airbag in such a manner that the airbag door 20 is difficult to separate, the mounting portion is not limited to the “hole” form like the mounting hole 12. For example, the mounting portion may be in the form of a support piece provided at a required position on the panel substrate 11. When the front cover portion 22 is set to be larger and the front cover portion 22 forms the upper half of the instrument panel 10, the lower half of the instrument panel 10 is formed. The upper edge of the panel substrate 11 is a mounting portion.

Further, in each of the above embodiments, the airbag door 20 including two door panel portions 26, 26 has been exemplified. However, the number of the door panel portions 26 is not limited to this, and one door panel portion may be provided. , An airbag door including four door panels, and the like.

[0028]

As described above, according to the air bag door opening structure according to the present invention, when excessive stress is applied to the hinge part in the process of opening the door panel part due to the pressing force of the air bag, Beneficial effect that the door panel portion and the support frame portion are broken at the portion to be broken and the stress applied to the hinge portion is released to prevent the door panel portion from breaking at the hinge portion and scattering. To play.
Then, the door panel separated from the support frame portion can be further opened and displaced while being supported by the outer edge wall of the front cover portion.
Thereby, even if the airbag door is formed of a highly rigid elastomer, there is an advantage that the inconvenience that the door panel portion separates and scatters is preferably avoided. In addition, if the second hinge portion is provided on the outer edge wall, the door panel portion separated from the support frame portion can be more smoothly opened and displaced around the second hinge portion. The portion to be broken provided in the support frame portion can be appropriately broken by providing a groove portion in the support frame portion and forming a thin portion, or by forming a plurality of slits formed at required intervals. It is.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an airbag door implemented in an airbag door opening structure according to a first embodiment of the present invention, as viewed from the back surface side.

FIG. 2 is a side sectional view of the airbag door shown in FIG.

FIG. 3 is an enlarged cross-sectional view of a portion A in FIG. 2, showing a mode of breakage at a portion to be broken which is formed as a thin portion by forming a V notch in a support frame portion.

FIGS. 4A and 4B are explanatory views showing the opening structure of the airbag door according to the first embodiment over time, wherein FIG. 4A is a sectional view showing that the airbag has started inflating, and FIG. 3A and 3B show the airbag door in a perspective state.

FIGS. 5A and 5B are explanatory views showing the opening structure of the airbag door according to the first embodiment over time, and FIG. 5A is a diagram in which an inflating airbag presses a door panel to break at a portion to be cleaved; It is shown in a cross-sectional state that it has begun to wake up, and (b) shows the airbag door in the state of (a) in a perspective state.

FIG. 6 is an explanatory diagram showing the opening structure of the airbag door according to the first embodiment with time, and FIG. 6 (a) is broken by applying excessive stress to the hinge part in the process of opening the door panel part. The cross section shows that the fracture started to occur at the scheduled part,
(b) shows the airbag door in the state of (a) in a perspective state.

FIGS. 7A and 7B are explanatory views showing the opening structure of the airbag door according to the first embodiment with time, and FIG. 7A is a view illustrating the door panel portion having the outer edge of the front cover portion when the break is completed at the scheduled break portion. Opening while supported by a wall is shown in cross section,
(b) shows the airbag door in the state of (a) in a perspective state.

FIG. 8 is a schematic perspective view of an airbag door implemented in an airbag door opening structure according to a second embodiment of the present invention, as viewed from the back side.

9 is a side sectional view showing the airbag door shown in FIG. 8 in an embodiment in which the airbag door is engaged with a panel base material of an instrument panel.

FIG. 10 is a side cross-sectional view showing that the inflating airbag presses a door panel portion, so that a break starts to occur at a portion to be cleaved.

FIG. 11 is a side cross-sectional view showing that an excessive stress is applied to a hinge portion in a process of opening a door panel portion, so that a break starts to occur in a portion to be broken.

FIG. 12 is a view showing a state in which the door panel portion is supported by the outer edge wall of the front cover portion and the second portion is completed by the completion of the breaking at the portion to be broken.
It is a sectional side view which shows opening displacement centering on a hinge part.

FIG. 13 is an enlarged view of a portion B in FIG. 8;

FIG. 14 is a perspective view of the airbag door in which a breakable portion is formed by a plurality of slits formed at required intervals in the support frame portion, as viewed from the back side.

FIG. 15 is a partial perspective view of an instrument panel in which an airbag door is mounted on a panel base material.

FIG. 16 is a sectional view taken along line XX of FIG. 15;

FIG. 17 is a side cross-sectional view showing that breakage has started to occur in the hinge portion when excessive stress is applied to the hinge portion in the process of opening the door panel portion pressed by the airbag.

FIG. 18 is a perspective view showing an inconvenience that the door panel portion is completely separated from the support frame portion and scattered due to breakage at the hinge portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Instrument panel (vehicle interior member) 12 Mounting hole (mounting part), 14 Airbag device 16 Airbag, 22 Surface cover part 24 Outer edge wall, 26 Door panel part 28 Support frame part, 30 Expected cleavage part 32 Hinge part (No. 1 hinge part), 38 scheduled breakage part 40 V notch (groove part), 42 second
Hinge 44 Slit

Claims (4)

[Claims] 1. A front cover part (22) which is fixed to a mounting part (12) provided on a vehicle interior member (10) so as to be difficult to separate from the mounting part, and a line formed integrally with the front cover part (22). Expected cleavage
(30) and the door panel defined by the hinge (32)
(26, 26) and a support frame (28) integrally formed on the back side of the front cover (22), surrounding the door panel (26, 26), and fixed to the airbag device (14). ), The airbag (16) that has started inflating is the door panel part (26, 26).
The door panel portions (26, 26) that are opened along the hinge portion (32) are broken by pressing the to-be-cleaved portion (30) by pressing from the inside, and the support is performed through the hinge portion (32). Frame (2
8) In the opening structure of the airbag door configured to be able to be supported by the door panel part (26, 26) at a position adjacent to the hinge part (32) in the support frame part (28), The hinge portion (32) is broken when excessive stress is applied, and a breakable portion (38) for separating the door panel portions (26, 26) and the support frame portion (28) is provided, and the support frame portion is provided. The door panel part (26, 2) separated from (28)
6) is supported by the outer edge wall (24) of the front cover portion (22) located on the outer edge side of the support frame portion (28) so as to prevent the door panel portions (26, 26) from scattering. An airbag door opening structure, characterized in that it is configured. 2. A second hinge part (42) different from the hinge part (32) serving as a first hinge part at a required position on the outer edge wall (24).
The opening structure of an airbag door according to claim 1, further comprising: disposing the door panel portion (26, 26) separated from the support frame portion (28) further along the second hinge portion (42). 3. The breakable portion (38) is connected to the support frame (2).
3. The air according to claim 1, further comprising a groove portion formed as a thin portion in the hinge portion, whereby an easy breakage when excessive stress is applied to the hinge portion is realized. 4. Open structure of bag door. 4. The breakable portion (38) is connected to the support frame (2).
3. The method according to claim 1, further comprising a plurality of slits (44) formed at required intervals in (8), thereby achieving easy breakage when an excessive stress is applied to the hinge portion (32). Airbag door opening structure.