JP2002347552A - Opening structure of air bag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an appropriate expansion development of an air bag by avoiding interference between a door panel part and the expanding air bag. SOLUTION: The air bag 12 is constituted of a first door panel part 30 which is provided with an opening regulating member 17 and is located on an opening hinge side, and a second door panel part 13 which is hinge connected to the first door panel part 30 and is located on the opening free end side. The second door panel part 31 is bendingly deformable into a chevron shape relative to the first door panel part 30. Thus, when the pressing force of the air bag 22 acts on, the first panel part 30 and the second panel part 31 are integrally opened and displaced to the regulated position by the opening regulating member 17 in the first place, and then, the second door panel part 31 is furthermore opened and displaced like a chevron shape relative to the opened and regulated first door panel part 30. In this way, the interference between the second door panel part 31 and the air bag 22 is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for opening an airbag door, and more particularly, to a one-sided airbag door provided on a vehicle interior member, and the door is opened when the airbag door is opened. An opening regulating member provided to avoid colliding with the glass, and when the airbag presses the back surface of the airbag door by operation of the airbag device, the opening regulating member reaches the regulating position by the opening regulating member. The present invention relates to an airbag door opening structure in which the airbag door is opened to allow the airbag to inflate and deploy.

[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 20 for the passenger seat is fixed to a reinforcement bar 24 or the like disposed in front of the passenger compartment 23 as shown in FIG. The instrument panel 10 is provided inside the passenger seat side of the instrument panel 10 in a retracted state. Therefore, the instrument panel 1
The airbag door 12 that opens and displaces toward the occupant compartment 23 is provided on the panel base material 11 constituting the airbag device 20 at a position corresponding to the opening of the inflator 21 in the airbag device 20. The door 12
Is released from the panel base material 11 so that the airbag 22
The airbag insertion opening 16 which allows the passage of the airbag is defined.

The form of the airbag door 12 is as follows.
A single-opening type comprising one door panel and a double-opening type comprising two door panels have been put to practical use. Among them, the one-sided airbag door 12 has a form in which the door panel portion 13 is opened with the windshield 25 side as a hinge point as shown in FIG. 7, and the two-sided airbag door 12 is shown in FIG. In this manner, the door panels 14 are opened with the windshield 25 side and the passenger seat side as hinge points.

[0004]

In the case of the one-sided airbag door 12 illustrated in FIG. 7, when the door panel 13 is opened, the door panel 13 is
In order to avoid collision with the boss 5, for example, a locking boss 19 provided on the side of the inflator 21 of the airbag device 20
Opening regulating member 17 composed of a guide rail 18
Is provided to restrict the opening displacement beyond the opening angle shown in FIG. Because of this, the opened door panel portion 13 protrudes in an inclined state above the airbag insertion port 16 and stops in the deployment area of the airbag 22. There is a fear that the airbag 22 that inflates and deploys may contact and interfere with the door panel portion 13 and impair the proper and smooth deployment of the airbag 22 and reduce the occupant protection function. In addition, since the pressing force of the airbag 22 acts on the door panel portion 13 in the opening restricted state by the opening degree regulating member 17, there is a fear that the door panel portion 13 may be damaged in some cases.

On the other hand, in the double-door type airbag door 12 shown in FIG. 8, there is no fear that each door panel portion 14, 14 collides with the windshield 25, and each opened door panel portion 14, 14 has an airbag insertion port. Since it does not protrude above the airbag 16, it is possible to preferably avoid contacting and interfering with the airbag 22 that is inflated and deployed into the occupant compartment 23 through the airbag insertion port 16. However, as is clear from FIG. 8, the door panel portion 14 located on the occupant seat side has an open edge 14a oriented toward the occupant seat side. There is an inherent problem that a secondary disaster caused by colliding with No. 14 is induced and the degree of injury is increased. In particular, the open edge 14a has a sharp portion formed at the time of breakage, which is extremely dangerous.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems suitably, and avoids interference between a one-sided door panel portion and an inflating airbag so as to properly inflate and deploy the airbag. It is an object of the present invention to provide an opening structure of an airbag door in which the opening is performed.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the intended object, the present invention provides a one-sided airbag door provided in a vehicle interior member, and a method for opening the airbag door. An opening restricting member provided to prevent the door from colliding with the windshield; and when the airbag presses the rear surface of the airbag door by operation of the airbag device, the opening restricting member is provided. The opening structure of the airbag door, wherein the airbag door is opened to the regulation position by the airbag door and allows the inflation and deployment of the airbag, the airbag door is provided with the opening degree regulating member. The first door panel is located on the open hinge side, and the second door panel is hinged to the first door panel and located on the open free end side. To enable bending deformation in Yamagata for one door panel portion, said when the pressing force of the airbag is applied, first of all the first to restricting position by the opening regulating member
The door panel portion and the second door panel portion are integrally opened and displaced, and the second door panel portion is further opened and displaced with respect to the first door panel portion whose opening is restricted, so that the second door panel portion and the airbag are displaced. And interference with the device is avoided.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an airbag door opening structure according to the present invention. The open structure of the airbag door of the present application is a one-sided airbag door 12 shown in FIG.
This is an improvement on the basis of. Therefore, the same members as those already described are denoted by the same reference numerals.

FIG. 1 is a side sectional view showing a process of opening an airbag door which receives a pressing force of an airbag based on an airbag door opening structure according to this embodiment. The open structure of the airbag door in the present embodiment is different from the conventional open structure of the single-sided airbag door shown in FIG. 7 in that the conventional door panel portion 13 is replaced with the first door panel portion 30.
And a second hingedly connected to the first door panel portion 30.
A door panel section 31;
With the hinge line 32 provided at the boundary of the center 31 as the center,
The second door panel portion 31 is configured to be bent and deformed in a mountain shape with respect to the first door panel portion 30.

The airbag door 12 of the embodiment is made of the panel base material 11 made of synthetic resin made of polypropylene or the like.
The design surface is always formed as a part of the panel substrate 11. That is, the panel substrate 1
1 on the back side on the passenger seat side.
As shown in FIG. 2, a portion 15 to be cleaved is formed in a groove shape along the outer edge of the airbag door 12 at a portion corresponding to the above. The portion 15 to be cleaved is thinner than the general portion of the panel substrate 11. Therefore, as described later, the airbag 2 in the inflation process is operated by the operation of the airbag device 20.
When a pressing force of 2 is applied, stress concentrates on the planned cleavage portion 15 and breaks along the planned cleavage portion 15 so that the airbag door 12 is entirely separated from the panel base material 11. become.

In the air bag door opening structure of the embodiment, as described above, the air bag door 12 is formed by connecting the guide rail 18 of the opening degree regulating member 17 to the first door panel located on the opening hinge side. The first door panel portion 30 and a second door panel portion 31 hingedly connected to the first door panel portion 30 and located on the open free end side.
A linear groove-shaped hinge line 32 is recessed at the boundary between the door panel portion 30 and the second door panel portion 31 so that the airbag 22
The second door panel portion 31 which has received the pressing force can be bent and bent in a mountain shape with respect to the first door panel portion 30 around the hinge line 32.

Since the panel base material 11 integrally forming the airbag door 12 is a molding material made of a synthetic resin as described above, it receives an instantaneous pressing force of the airbag especially at a low temperature. In such a case, there is a fear that the airbag door 12 and the area around the door may be greatly damaged by the strong impact. For this reason, a metal door reinforcing member 35 is crimped on the back side of the panel base material 11 corresponding to the airbag door 12 in order to prevent breakage and scattering of the airbag door 12 and a peripheral portion of the door. The strength is improved. As shown in FIGS. 1 to 3, the door reinforcing member 35 is provided on the inflator 2 of the airbag device 20.
1 and a rectangular cylindrical fixing bracket 36 for supporting the back side of the door peripheral portion, and the first door panel portion 30 and the second door panel portion provided inside the opening of the fixing bracket 36. And a movable bracket 37 that supports the back side of the movable bracket 31.

The fixing bracket 36 has a rectangular cylindrical shape fixed so as to surround the outer edge of the airbag door 12, and has a rectangular cylindrical shape which is locked and held by the inflator 21 of the airbag device 20. Body part 38 and this cylindrical body part 38
And a frame-shaped engaging plate portion 39 which is integrally formed with the panel base material 11 and is caulked tightly to the back surface of the peripheral portion of the door in the panel base material 11. Then, the cylindrical portion 38
Are provided with a total of four locking holes 40 in which the locking members 26 fixed to the inflator 21 of the airbag device 20 can be locked. Further, a slit-shaped engaging hole 42 that allows the insertion of a rib 41 formed on the back side of the door peripheral portion is provided in the engaging plate portion 39.
Are provided at appropriate positions.

The movable bracket 37 includes a fixed support panel 43 fixed inside the rear wall 38a of the cylindrical body 38 of the fixed bracket 36, and a plurality of first variable connecting portions 46.
Is connected to the fixed support panel 43 through the
A first movable support panel 44, which is crimped on the back side of the door panel section 30, is connected to the first movable support panel 44 via a plurality of second variable connection sections 47, and a crimped section is formed on the back side of the second door panel section 31. And a second movable support panel 45 attached thereto. The fixed support panel 43
Is welded or screwed to the inner surface of the cylindrical portion 38 of the fixing bracket 36, and the inflator 2 of the airbag device 20 is
A locking hole 48 in which the locking member 26 fixed to 1 can be locked.
Are provided in total (all the locking holes 48 are not shown). Further, the first movable support panel 44 and the second movable support panel 45 have slit-like engagements that allow the insertion of respective ribs 49 formed on the back surfaces of the corresponding first door panel portion 30 and second door panel portion 31. Hole 5
A plurality of 0s are established at appropriate positions.

Each of the first variable connecting portions 46 has a semi-circular shape capable of extending and deforming linearly, and when the pressing force of the airbag 22 acts on the first movable support panel 44, The first movable support panel 44 is allowed to float by being deformed from a circular arc to a straight line, thereby causing a break in the cleavable portion 15. After being completely separated from the panel substrate 11 from the airbag door 12, it functions as a hinge portion of the airbag door 12. On the other hand, each of the second variable connecting portions 47 has a semi-circular shape capable of extending and deforming and is positioned corresponding to the hinge line 32, and the pressing force of the airbag 22 is applied to the second movable support panel 45. When the second door panel portion 31 bends and deforms in a mountain shape with respect to the first door panel portion 30 by acting, the second door panel portion 31 is appropriately deformed to allow the posture of the second door panel portion 31 to be displaced, and the second movable support panel 45 Support so that it does not scatter.

The guide rail 18 constituting the opening regulating member 17 is formed so as to hang from both left and right ends of the first movable support panel 44 of the movable bracket 37, and the inflator 21 of the airbag door 12 is provided.
The locking bosses 19 projecting from the side surfaces are respectively engaged with the locking bosses 19.

[0017]

Next, the operation of the air bag door opening structure according to the embodiment configured as described above will be described.

The door reinforcing member 35 includes a fixing bracket 36.
The movable bracket 37 is provided inside the opening of the cylindrical body
The fixed support panel 43 of the fixed bracket 36 is fixed, and the fastening plate portion 39 of the fixed bracket 36 is caulked to the back surface of the panel base 11 around the door. The back side of the one door panel portion 30 is swaged, and the second movable support panel 45 of the movable bracket 37 is attached to the second door panel portion 31.
Caulking on the back side of. Then, the instrument panel 10 in which the door reinforcing member 35 is fixed to the panel base material 11 is attached to the front of the passenger compartment 23 with the airbag device 20 disposed in advance on the reinforcement bar 24 and the like in front of the passenger compartment 23. Thereby, each locking member 26 fixed to the inflator 21 of the airbag device 20 is locked to each locking hole 40, 48 of the fixed bracket 36 and the movable bracket 37 (FIG. 4). Further, each guide rail 18 provided on the movable bracket 37 is connected to the inflator 2 of the airbag device 20.
1 is engaged with each locking boss 19.

When the airbag device 20 operates under this condition, the inflated airbag 22 comes into contact with the first movable support panel 44 and the second movable support panel 45 of the movable bracket 37 and the first door panel portion. 30 and the second door panel 31 are pressed from below. here,
When a required pressing force acts on the first door panel portion 30 and the second door panel portion 31, breakage occurs at the portion 15 to be cleaved, and when the breakage at the portion 15 to be cleaved is completed, the two door panel portions 30, 31 become panel members. It is completely separated from the substrate 11. Then, the first door panel section 30 and the second door panel section 31 float up until the respective first variable connection sections 46 are completely extended, while the two door panel sections 30, 31 are inflated with the inflation of the airbag 22. First variable connection part 4
6 is used as a hinge to open and displace integrally to the regulation position of the opening regulation member 17 (FIG. 5).

When the airbag 22 is further inflated,
The opening of the first door panel portion 30 is further restricted by the opening regulating member 17. However, the second door panel portion 31 which has received the pressing force of the airbag 22 is opened by the first door panel portion 30. The hinge line 32
Is further displaced in a chevron around the center (FIG. 6). Therefore, the second door panel portion 31 retreats from the deployment region of the inflating airbag 22 through the airbag insertion opening 16, and interference with the airbag 22 is preferably avoided (see FIGS. 1 and 2). 6).

In the state where the first door panel portion 30 is stopped and held at the regulating position by the opening regulating member 17, a required space is secured between the first door panel portion 30 and the windshield 25. When the second door panel portion 31 is bent and deformed with respect to the one door panel portion 30, it is considered that the second door panel portion 31 does not contact the windshield 25 (FIG. 1).

Therefore, in the air bag door opening structure in the embodiment, the second door panel portion 31 located at the open free end side is displaced in a mountain shape with respect to the first door panel portion 30 based on the pressing force of the air bag 22. As a result, the second door panel portion 31 retreats from above the airbag insertion port 16 and retreats from the deployment region of the airbag 22, whereby interference with the airbag 22 is suitably avoided. Accordingly, since the proper and smooth deployment of the airbag 22 is not impaired, the disadvantage of lowering the occupant protection function of the airbag 22 is suitably prevented. Further, after the first door panel portion 30 and the second door panel portion 31 are opened, the pressing force of the inflating airbag 22 hardly acts.
There is no fear that 0,31 will be damaged.

As is clear from FIGS. 1 and 6, the open edge 31a of the second door panel portion 31 bent and deformed in a mountain shape with respect to the first door panel portion 30 is directed toward the windshield 25 and the occupant. Since the vehicle is not directed to the seat side, a secondary disaster caused by the occupant thrown forward colliding with the door panel portion 31 can be suitably avoided.

When the second door panel portion 31 is bent and deformed in a mountain shape with respect to the first door panel portion 30, the second door panel portion 31 is completely separated from the first door panel portion 30 by the hinge line 32. Alternatively, the second door panel section 31 may not be separated from the first door panel section 31. The second door panel 3
When the first door panel portion 3 is bent and deformed into a mountain shape,
0, the first movable support panel 4
Since it is fixed to the second movable support panel 45 connected to the fourth movable member 4, it does not fly.

[0025]

As described above, according to the airbag door opening structure of the present invention, the airbag door is hingedly connected to the first door panel located on the opening hinge side. And the second door panel is located on the free open end side, and the second door panel is bent and deformed in a mountain shape with respect to the first door panel based on the pressing force of the airbag. The part is retracted from the deployment area of the airbag, so that interference with the airbag is preferably avoided. Therefore, even if the airbag door is a single-opening type, the airbag does not impair the proper and smooth deployment of the airbag, so that an advantage that the occupant protection function of the airbag is lowered can be preferably prevented. There is. Further, after the first door panel and the second door panel are opened, the pressing force of the inflating airbag hardly acts, so that there is no fear that both door panels are damaged. Further, the open edge of the second door panel bent and deformed in a mountain shape with respect to the first door panel is directed toward the windshield and not toward the occupant seat.
There are advantageous effects such as that a secondary disaster caused by the occupant thrown forward colliding with the door panel portion can be suitably avoided.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view showing a process of opening an airbag door which receives a pressing force of an airbag based on an airbag door opening structure according to a preferred embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of the panel base material, showing an airbag door formed on the panel base material and a door reinforcement disposed on the back side of the base material so as to correspond to the airbag door. And members.

FIG. 3 is a perspective view of a door reinforcing member showing a movable bracket separated from a fixed bracket.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

5 operates the airbag device from the state shown in FIG. 4 so that the first door panel portion and the second door panel portion which have received the pressing force of the airbag during the inflation process are integrated with the opening position regulating member to the regulating position. FIG. 5 is a side cross-sectional view showing a state in the middle of opening, which has been opened.

FIG. 6 shows a state in which the airbag is further inflated from the state shown in FIG.
It is a sectional side view which shows the completion state of opening which bent and deformed the 1st door panel part to which opening was restricted in the shape of a mountain.

FIG. 7 is a side sectional view showing an open structure of a conventional one-sided airbag door.

FIG. 8 is a side sectional view showing an open structure of a double-opening airbag door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Instrument panel (vehicle interior member) 12 Airbag door 17 Opening restriction member 20 Airbag device 22 Airbag 25 Windshield 30 First door panel part 31 Second door panel part

Claims (1)

[Claims] 1. A one-sided airbag door (12) provided on a vehicle interior member (10), and the door (12) collides with a windshield (25) when the airbag door (12) is opened. When the airbag (22) presses the back surface of the airbag door (12) by the operation of the airbag device (20), the opening degree regulating member (17) provided to avoid An airbag door opening structure in which the airbag door (12) is opened to a position regulated by an opening degree regulating member (17) to allow inflation and deployment of the airbag (22). The door (12) is provided with a first door panel (30) provided with the opening degree regulating member (17) and located on an open hinge side.
And a second door panel portion (31) hingedly connected to the first door panel portion (30) and located at an open free end side, and the second door panel portion (31) is constituted by the first door panel portion (30). When the pressing force of the airbag (22) is applied, the first door panel part (30) and the second door panel are first moved to a position regulated by the opening degree regulating member (17). When the second door panel portion (31) further opens and displaces with respect to the first door panel portion (30) whose opening is restricted, the second door panel portion (31) is displaced integrally. 31) and the airbag (22)
An airbag door opening structure characterized in that interference with the airbag door is avoided.