JP2002347559A - Rebound preventive structure of air bag door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly protect rebounding of an air bag door when the air bag door collides with the door peripheral parts. SOLUTION: A tear scheduled part 40 to be torn by its impact when the door panel parts 13, 14 are collided is provided at a prescribed position of the door peripheral position 18. A deformation allowable part 41 allowing the cylindrical body part 28 to be deformed like being pushed to shrink by impact force applied when the door panel parts 13, 14 are collided with the door peripheral part 18. Thus, when the door panel parts 13, 14 are collided with a door peripheral position 18, the door peripheral position 18 is deformed downward by the tearing of the tear scheduled part 40 and pushing for shrinking of the cylindrical body part 28 to absorb the impact in collision, thereby preventing the rebounding of the door panel parts 13, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a rebound of an airbag door, and more particularly, to an airbag door provided on an interior member of a vehicle, which is opened by a pressing force of the airbag to a portion around the door. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a rebound of an airbag door, which prevents a rebound from being caused by a reaction caused by the collision to avoid a secondary disaster.

[0002]

2. Description of the Related Art In recent years, most passenger vehicles are equipped with a driver airbag device and a passenger airbag device as standard equipment in order to protect occupants from an impact due to a collision or the like. The airbag device for the driver's seat is generally provided in a horn pad portion at the center of the steering. The airbag device for the passenger's seat is located in the passenger compartment 19 as shown in FIGS. 14 and 15, for example. It is installed in a state where it is stored inside the front of the front passenger seat in the instrument panel 10 as a vehicle interior member assembled in the front.
For this reason, in the panel base material 11 of the instrument panel 10, an airbag door 12 that is opened and displaced toward the passenger compartment 19 is separately mounted or integrally formed at a portion corresponding to the airbag device 20 for the passenger seat, When the door 12 is separated from the panel base material 11 and opened, an airbag insertion opening 17 opened to the passenger compartment 19 is defined. That is, when the airbag device 20 is operated by sensing the impact of the collision, the inflated airbag 22 presses the airbag door 12 from inside, and the door 12
, The airbag is deployed into the passenger compartment 19 through the airbag insertion opening 17 defined.

In recent years, the airbag door 12 is formed integrally with the panel substrate 11 so that
The part which forms the design surface as a part of 1 is the mainstream, and when the airbag device 20 receives the pressing force of the inflating airbag 22 when the airbag device 20 is actuated, it is provided on the panel base material 11 in advance. The central cleavage scheduled portion 15 and the outer edge cleavage scheduled portion 16
The break along the line allows the substrate to be separated and opened. The form of the airbag door 12 includes, for example, a single-opening type having one door panel portion and a double-opening type (shown) having two door panel portions 13 and 14.

Since the panel base material 11 which integrally forms the airbag door 12 is generally a molded material made of synthetic resin made of polypropylene or the like, the instantaneous operation of the airbag especially at a low temperature is performed. When a strong pressing force is applied, the airbag door 12 and the door surrounding area 1
8 may be severely damaged. For this reason, on the back side of the panel base material 11 corresponding to the airbag door 12, for example, a metal door reinforcing member 25 made of metal is provided to prevent breakage and scattering of the airbag door 12 and the door peripheral portion 18. Measures are taken to increase strength by swaging. Assuming that the airbag door 12 has double door panels 13 and 14, the door reinforcing member 25 is locked and connected to the inflator 21 of the airbag device 20 as shown in FIG. A rectangular cylindrical fixed bracket 26 supporting the back side of the door peripheral portion 18, and movable brackets 27 27 provided inside the opening of the fixed bracket 26 and supporting the back sides of the respective door panel portions 13 and 14. It is composed of

[0005] In the panel substrate 11 locked and supported by the airbag device 20 via the door reinforcing member 25, each door panel portion 13, 14 of the airbag door 12 is reinforced and supported by the movable brackets 27, 27. At the same time, the door peripheral portion 18 is reinforced by the fixing bracket 26. Accordingly, the pressing force of the airbag 22 during the inflation process based on the operation of the airbag device 20 is reduced by the airbag door 12.
When acting on the rear surface of the door, the floating around the door peripheral portion 18 and other damages resulting therefrom are suitably prevented, and
When the door panel portions 13 and 14 that are separated from the panel base material 11 and displaced and collide with the door peripheral portion 18, damage to the airbag door 12 and the door peripheral portion 18 can be suitably prevented. Has become.

[0006]

By the way, in the above-described open state of the airbag door, each door panel portion 1 separated from the panel base material 11 by receiving the pressing force of the airbag 22 is provided.
As shown by the two-dot chain line in FIG. 16, 3, 14 and 14 strongly collide with the door peripheral portion 18 due to the strong pressing force of the airbag 22 which is instantaneously inflated. However, the door peripheral portion 18 colliding with both door panel portions 13 and 14
Has a structure that cannot be deformed downward (inward of the panel base material 11) by the fixing bracket 26 locked and supported by the airbag device 20. Can hardly absorb the collision energy at the time of collision. Therefore, each of the door panel portions 13 and 14 colliding with the door peripheral portion 18 rebounds greatly due to a reaction force colliding with the door peripheral portion 18, and in some cases interferes with the inflating airbag 22 to cause the airbag 22 to move. There was a fear that the occupant protection function would be impaired. As is clear from FIG. 16, the door panel portion 13 located on the occupant seat side has a posture state in which the open edge 13a faces the occupant seat side when it collides with the door peripheral portion 18 and rebounds. Because
There is an inherent problem that the occupant thrown forward collides with the door panel unit 13 to cause a secondary disaster, which increases the degree of injury. In particular, said open edge 1
3a also has a sharp portion formed at the time of breaking, which is a very dangerous state. In a cold state (a state in which the surface temperature of the panel base material 11 becomes 0 ° C. or less), the panel base material 11 becomes hard due to the characteristics of the synthetic resin forming the panel base material 11. The degree of recoil of the door panel portions 13 and 14 that collided with the vehicle is further increased.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed to suitably solve the above-mentioned problem, and an airbag door released from a panel base material collides with a peripheral portion of the door due to a pressing force of an airbag. At this time, by adopting a structure that absorbs collision energy by appropriately deforming the peripheral portion of the door,
An object of the present invention is to provide a structure for preventing the airbag door from rebounding, which can be suitably prevented from rebounding.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the intended object, the present invention provides a door panel portion provided on a vehicle interior member, the door peripheral portion of which is provided inside the vehicle interior member. It is supported from the back side by a door reinforcing member connected to the arranged airbag device, and when the pressing force due to the inflation of the airbag acts on the back surface of the door panel portion, it prevents the surrounding portion of the door from floating outward. In addition, in the airbag door configured to prevent breakage of the door panel portion when the door panel portion collides with the door peripheral portion, the door panel portion is provided at a required position in the door peripheral portion, and the door panel portion collides. A portion to be broken which is broken by the impact at the time, and provided on the wall surface of the cylindrical portion of the door reinforcing member, and when the door panel portion collides with a door peripheral portion and an impact force is applied, the cylindrical portion is pushed. And a deformation permissible portion that allows a temporary deformation, and when the door panel portion collides with the door peripheral portion, the door peripheral portion is deformed downward due to breakage of the expected break portion and compression of the cylindrical body portion. In this way, a shock is absorbed at the time of collision to prevent the door panel from rebounding.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a structure for preventing the airbag door from rebounding according to the present invention. In the embodiment,
As the vehicle interior member, the instrument panel 10 shown in FIG. 14 is illustrated, and the same members and parts as those already described in the section of the prior art described with reference to FIGS.
The parts are designated by the same reference numerals.

FIG. 1 is an enlarged view of a portion A in FIG. 9, showing a structure for preventing the airbag door from rebounding according to a preferred embodiment of the present invention. FIG. 3 is a partial cross-sectional view showing a state in which a collision has occurred. The structure for preventing the airbag door from rebounding according to the embodiment is provided at a required position in the door peripheral portion 18 and is rupture scheduled to be broken by an impact when the door panel portions 13 and 14 of the airbag door 12 collide. Part 40 and the door reinforcing member 25
A deformation permitting portion 41 which is provided on the wall surface of the cylindrical portion 28 to allow the airbag door 12 to compressively deform the cylindrical portion 28 when the airbag door 12 collides with the door peripheral portion 18 and an impact force is applied. It is composed of

As shown in FIG. 2, the to-be-ruptured portion 40 is formed at the center to-be-cleaved portion 1 formed on the panel base material 11.
5 and the portion 16 to be cleaved at the outer edge, each door panel portion 1
The short side portion of the scheduled outer edge cleavage portion 16 located at the side edge of each of the third and fourth portions 14 is formed to extend linearly at both ends. In other words, each of the breakable portions 40 is located at the door peripheral portion 18.
, The door panel portions 13 and 14 are formed along the left and right side edges of the contact regions 42 and 42 where the door panel portions 13 and 14 collide directly, so that the door panel portions 13 and 14 collide with the contact regions 42 and 42. The contact area 42, 4
2 and the non-contact areas 43, 43 are separated from each other, and the deformation of both the contact areas 42, 42 is allowed.

The end of the breakable portion 40 is provided at the end of FIG.
As shown in FIG. 2, a thick break stopper 44 protruding from the back surface of the panel base material 11 is provided, and the break occurs when the door panel portions 13 and 14 collide with the contact areas 42 and 42 of the door peripheral portion 18. The breaking of the scheduled portion 40 does not extend more than necessary. The break stopper 44 is not limited to a thick boss as shown in the figure, but may be, for example, a rib.

As shown in FIG. 4, the door reinforcing member 25 is based on the conventional door reinforcing member 25 shown in FIG. A tubular fixing bracket 26 connected and supported between the back surface and the airbag device 20 installed inside the panel base material 11;
Movable brackets 27, 2 connected and supported between the back surfaces of the respective door panel portions 13, 14 and the fixed bracket 26.
7 is comprised.

The fixing bracket 26 has a rectangular cylindrical shape fixed so as to surround the outer edge of the airbag door 12, and has a rectangular cylindrical shape engaged and held by an inflator 21 of the airbag device 20. Body part 28 and this cylindrical body part 28
And a frame-shaped engaging plate portion 29 which is integrally formed with the panel base material 11 and is closely caulked to the back surface of the door peripheral portion 18 in the panel base material 11. In the opposed wall portions (the front wall surface 28a and the rear wall surface 28b) of the cylindrical body portion 28, a locking hole 30 in which a locking member 23 fixed to the inflator 21 of the airbag device 20 can be locked.
Are provided in total of four. In addition, the attachment plate portion 2
9 are ribs 4 projecting behind the door peripheral portion 18.
A plurality of slit-shaped engaging holes 31 that allow the insertion of the fifth through-hole 5 are provided.

On the wall surface of the cylindrical portion 28 of the fixing bracket 26, slits 46 of a required length constituting the deformation permitting portion 41 are formed in series in the circumferential direction of the cylindrical portion 28 at required intervals. Is formed. Here, the deformation permitting portion 41 is provided in the contact area 4 in the door peripheral portion 18.
The front wall surface 28a of the adjacent cylindrical body portion 28 corresponding to 2, 42
The slits 46 are formed on the rear wall surface 28b and have a total length of about 20 to 40 mm and a width of about 3 to 10 mm. As a result, each of the door panel portions 13 and 14 of the airbag door 12 is connected to the contact area 4 of the door peripheral portion 18.
2 and 42, the front piece 2 of the fastening plate portion 29
When a pressing force from above is applied to the rear piece 9a and the rear piece 29b, the front wall 2 of the cylindrical body 28 is
Due to the reduced rigidity of the rear wall 8a and the rear wall 28b, both wall surfaces 28a and 28b are compressed in the axial direction of the tubular body 28, and the front piece 29a and the rear piece 29b are displaced downward. . In addition, since the fixing bracket 26 has the slits 46 constituting the deformation permitting portion 41 intermittently formed, expansion in the axial direction when receiving the pressing force of the airbag 22 is suitably restricted.

As shown in FIG. 4, each of the four corners of the attachment plate 29 is cut off, and the door peripheral portion 1 is cut off.
8, the front piece 29 corresponding to the contact areas 42, 42
a and the rear piece 29b are connected to the non-contact area 4 at the site 18.
The left and right pieces 29c and 29d corresponding to 3, 43 are separated from each other. Therefore, the door panel section 13,1
When the front panel 29 collides with the contact areas 42, 42 of the door peripheral portion 18 to apply a pressing force to the front piece 29a and the rear piece 29b, the pressing force is applied only to the front piece 29a and the rear piece 29b. And a front wall surface 28a of the cylindrical body 28.
The rear wall 28b is efficiently pressed and compressed, and the front piece 29a and the rear piece 29b are appropriately displaced downward.

That is, in the structure for preventing the airbag door from rebounding according to the embodiment, each of the door panel portions 13 and 14 opened by receiving the pressing force of the airbag 22 collides with the contact areas 42 and 42 of the door peripheral portion 18. At this time, the respective breakable portions 40 are broken, and the front wall surface 28a and the rear wall surface 28b of the cylindrical body 28 of the fixed bracket 26 are compressed in the axial direction, so that each of the door peripheral portions 18 abuts. The regions 42, 42 are deformed so as to be inclined downward. Therefore,
When the door peripheral portion 18 is deformed, each door panel portion 1
The impact caused by the collision between the door panels 3 and 14 is absorbed, and the recoil of the door panels 13 and 14 is suitably prevented.

The movable brackets 27, 27 are provided opposite to each other inside the opening of the fixed bracket 26, and correspond to the door panel portions 13, 14 constituting the airbag door 12. 26, a fixed support panel 32 fixed to the inside of the cylindrical body portion 26, a movable reinforcing panel 33 caulked to the back surfaces of the corresponding door panel portions 13 and 14, and a semi-circular shape capable of linearly extending and deforming. And a plurality of variable connecting portions 34 for connecting the fixed support panel 32 and the movable reinforcing panel 33 to each other. The fixed support panel 32 is welded or screwed to the inner surface of the tubular body 28 of the fixed bracket 26, and has a locking hole 35 that can lock the locking member 23 fixed to the inflator 21 of the airbag device 20, A total of four are provided. The movable reinforcing panel 33 is provided with a plurality of slit-shaped engaging holes 36 that allow insertion of ribs 47 that are formed on the rear surfaces of the corresponding door panel portions 13 and 14.

[0019]

Next, the operation of the airbag door recoil prevention structure according to the embodiment configured as described above will be described.

The door reinforcing member 25 includes a fixing bracket 26.
Each movable bracket 2 is provided inside the opening of the cylindrical body
The fixed support panel 32 of the fixed bracket 27 is fixed, and the fastening plate portion 29 of the fixed bracket 26 is crimped to the back surface of the door peripheral portion 18 of the panel base material 11, while the movable bracket 27 Movable reinforcement panel 3
3 is crimped on the back side of the corresponding door panel portions 13 and 14. Then, the instrument panel 10 in which the door reinforcing member 25 is fixed to the panel base material 11 is assembled in front of the passenger compartment 19 with the airbag device 20 disposed in advance in a reinforcement bar or the like in front of the passenger compartment 19. Each of the locking members 23 fixed to the inflator 21 of the airbag device 20 includes a fixed bracket 26 and a movable bracket 2.
7 and 27, respectively.

As described above, the door panel portions 13 and 14 of the airbag door 12 provided on the panel base material 11 and the door peripheral portion 18 of the door 12 are locked to the airbag device 20 via the door reinforcing member 25. When the airbag device 20 is actuated while being supported, the airbag 22 starts inflating in a spherical shape with the center of the upper surface protruding, so that the upper surface of the airbag 22 is formed by the opposing edges of the respective movable reinforcing panels 33, 33. The first part comes into contact with the middle part of the part. here,
Although the upward displacement is permitted in the middle portion of the scheduled center cleave portion 15, the upward displacement of the formation portion of the outer edge scheduled cleave portion 16 is restricted. The concentrated portion acts on the portion 16 to be cleaved at the outer edge, and finally breaks at the portion 16 to be cleaved at the outer edge. Then, the movable brackets 27, 2
Until the variable connecting portion 34 of FIG. 7 is extended linearly, the door panel portions 13 and 14 are integrally raised (FIG. 5). However, at this time, since the door peripheral portion 18 is supported by the fixing bracket 26, no break has occurred at the respective break scheduled portions 40.

When the portion 16 to be cleaved at the outer edge is completely broken and each of the movable connecting portions 34 of the movable brackets 27 and 27 is linearly extended, the stress based on the pressing force of the airbag 22 is applied to the portion 15 to be cleaved at the center. The rupture is caused at the central portion of the central cleavable portion 15. And
When a partial break is formed in the vicinity of the center of the central cleavable portion 15, the entire rupture of the central cleave portion 15 progresses at a stretch as the pressing force increases due to the inflation of the airbag 22.

As described above, first, when the rupture at the scheduled outer edge portion 16 is completed and after the rupture at the central scheduled split portion 15 is completed as appropriate, the airbag door 1 with respect to the panel base material 11 is completed.
2, the opening displacement of each of the door panel portions 13 and 14 is allowed. As a result, the door panels 13 and 14 open at a stretch to the passenger compartment 19 while being pressed by the inflating airbag 22 (FIGS. 6 and 8).

The door panels 13 and 14 which receive the intense pressing force of the airbag 22 are opened and displaced at once at the respective variable connecting portions 34 as the center of rotation, and the respective contact areas 42 in the door peripheral portion 18 are opened. , 42 (FIGS. 7 and 9). At this time, the to-be-ruptured portion 40 is broken by the impact force generated by the collision of each of the door panel portions 13 and 14 with each of the contact regions 42 and 42, while the cylindrical portion 28 of the fixed bracket 26 is broken. Since the front wall surface 28a and the rear wall surface 28b are compressed in the axial direction, the respective contact areas 42, 42 of the door peripheral portion 18 are deformed to be inclined downward. Therefore, based on the break at the breakable portion 40, the deformation of the cylindrical body portion 28 of the fixing bracket 26, and the accompanying deformation of the contact regions 42, 42, the door panel portion 1
The impact caused by the collision of the door panels 3 and 14 is appropriately absorbed, and the door panels 13 and 14 colliding with the door peripheral portion 18 are preferably prevented from rebounding.

As a result, the door panel portions 13 and 14 which are opened by receiving the pressing force of the airbag 22 stop almost without returning from the state shown in FIG. 1 and FIG. There is no fear of interfering with the bag 22 and impairing the occupant protection function of the airbag 22. In addition, since the open edge 13a of the door panel portion 13 located on the occupant seat side hardly floats from the panel base material 11, the occupant thrown forward has the door panel portion 13.
The occurrence of the secondary disaster caused by the collision with the vehicle can be preferably avoided.

In the above-described embodiment, the case where the to-be-ruptured portion 40 provided at the door peripheral portion 18 is formed on the same axis as the short side of the outer-edge to-be-cleaved portion 16 is illustrated. For example, as shown in FIG. 10, the outer edge cleavage scheduled portion 16 may be formed radially from each corner.

In the above embodiment, the door reinforcing member 2
Regarding the engaging plate portion 29 in the fixing bracket 26 of No. 5,
The case where the front piece 29a and the rear piece 29b are separated from the left piece 29c and the right piece 29d by completely removing each of the four corners is illustrated. 11 (a) or FIG. 11 (b). That is, in FIG.
The slit 50 is provided between the (rear piece 29b) and the left piece 29c (the right piece 29d). Even in this case, the left piece 29c and the right piece 29d are formed based on the deformation at the deformation allowing portion 41. The front piece 29a and the rear piece 29 without deformation
Only b can be displaced. In FIG. 11B, an opening 51 is formed at a corner portion of the attachment plate portion 29, and the front piece 29a (the rear piece 29b) and the left piece 29c (the right piece 29d) are formed into a thin continuous portion 52. In this case, only the front piece 29a and the rear piece 29b can be displaced without deformation of the left piece 29c and the right piece 29d based on the deformation of the deformation permitting portion 41.

On the other hand, regarding the door reinforcing member 25,
The present invention is not limited to the form shown in the above embodiment. For example, FIG. 12 is a schematic perspective view showing another example of the fixing bracket 26 in the door reinforcing member 25, wherein a front piece 29 a and a rear piece 29 b of the attachment plate 29 are separate from the cylindrical body 28. The movement permitting portion 5 that allows the front piece 29a and the rear piece 29b to slide downward with respect to the tubular body 28 while being formed as members.
5 is provided on a wall surface (a front wall surface 28a and a rear wall surface 28b) of the cylindrical body portion 28. That is, the movement permitting portion 55
Is formed on a support piece 56 which is connected to the front piece 29a and the rear piece 29b and is in sliding contact with the outer surface of the tubular body 28, and has an elongated hole shape extending along the axial direction of the tubular body 28. The slit 57 and the front wall surface 28a or the rear wall surface 28b of the cylindrical body 28
Is fixed to the support piece 5 through the slit 57.
6 and a rod-shaped support member 58 which is locked to the wall surface. That is, when the front piece 29a and the rear piece 29b are positioned at the same height as the left piece 29c and the right piece 29d (the state shown in FIG. 12), the shaft of each support member 58 is positioned at the lower end of the corresponding slit 57. Located on the side
(FIG. 13A) The front piece 29a and the rear piece 29b are restricted from sliding upward, but are allowed to slide downward. The support member 5
8 is, for example, a rivet or a bolt.

Therefore, when the door panels 13 and 14 collide with the contact areas 42 and 42 of the door peripheral portion 18 and a pressing force is applied to the front piece 29a and the rear piece 29b from above, the movement is allowed. As each support member 58 in the portion 55 relatively moves in the corresponding slit 57,
The front piece 29a and the rear piece 29b slide downward along the outer surface of the tubular body 28, and the length of the tubular body 28 is reduced (FIG. 13B). This allows the respective contact areas 42, 42 in the door peripheral portion 18 to be inclinedly deformed in accordance with the breakage at the breakable portion 40, and the two door panels collided with the door peripheral portion 18. The rebound of the parts 13 and 14 is suitably prevented.

In the above embodiment, the instrument panel 10 is used as a vehicle interior member having an airbag door.
However, the airbag door targeted by the airbag door recoil prevention structure of the present application is not limited to the airbag door provided on the instrument panel 10. For example, a side airbag for a side airbag provided on a door trim is provided. Airbag doors and airbag doors for curtain airbags provided in pillar garnishes are also targeted.

[0031]

As described above, according to the structure for preventing the airbag door from rebounding according to the present invention, when the door panel opened by the pressing force of the airbag collides with the door peripheral portion, the door is closed. The portion to be broken provided in the peripheral portion is broken and the cylindrical portion of the door reinforcing member is compressed by the deformation permitting portion to allow deformation of the peripheral portion of the door, and the door panel portion is deformed when the peripheral portion of the door is deformed. Therefore, the door panel can be prevented from rebounding. As a result, the door panel portion opened by receiving the pressing force of the airbag stops almost without rebounding from the peripheral portion of the door, and thus interferes with the inflating airbag and impairs the occupant protection function of the airbag. There is an advantage that can be avoided. In addition, since the door panel portion has an open edge rising from the panel base material and does not face the occupant seat, the occurrence of a secondary disaster caused by the occupant thrown forward colliding with the door panel portion is also preferable. It has beneficial effects that can be avoided. Since the breakable portion is formed along the side edge of the contact portion where the door panel portion collides with the door peripheral portion, the contact portion receiving the impact force due to the collision of the door panel portion is appropriately deformed. Further, since the deformation permitting portion provided on the door reinforcing member is a slit extending to a required length in the circumferential direction of the cylindrical portion, the cylindrical portion which has been subjected to the impact force due to the collision of the door panel portion is appropriately compressed. Deform.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a portion A of FIG. 9, showing a structure for preventing a recoil of an airbag door according to a preferred embodiment of the present invention in a state where an opened airbag door collides with a door peripheral portion; It is sectional drawing.

FIG. 2 is a partial perspective view of a panel base material showing a scheduled central rupture portion and a scheduled outer edge cleave portion formed along the outer edge of each door panel portion of the airbag door, and a rupture scheduled portion formed around the door; .

FIG. 3 is a partial perspective view showing the back side of the panel base material on which an outer edge scheduled to be cleaved, a scheduled break, and a break stop are formed.

FIG. 4 is a partially broken perspective view of a door reinforcing member in which a movable bracket is separated from a fixed bracket.

FIG. 5 is a perspective view of a pre-opening state in which a portion to be cleaved at an outer edge is broken by a pressing force of an inflating airbag, and an airbag door separated from a panel base material floats appropriately.

FIG. 6 is a perspective view showing a state in which a central rupture portion is broken by a pressing force of an airbag further inflated from the state of FIG. 5, and a door panel portion is opened to a substantially vertical state.

FIG. 7 is a view showing a state in which an open door panel collides with a door peripheral portion, thereby breaking a portion to be broken and displacing a contact area of the door peripheral portion downward, thereby absorbing a shock at the time of collision; It is a perspective view of a state.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 7;

FIG. 10 is a partial perspective view of a panel base material showing a modified example of a breakable portion provided in a door peripheral portion.

FIG. 11A shows a form in which slits are provided at corners of a fastening plate portion of a fixed bracket so that only a front piece corresponding to a contact area around a door can be displaced;
(b) shows an embodiment in which an opening is provided at a corner portion of the fixing plate portion of the fixing bracket so that only the front piece corresponding to the contact area around the door can be displaced.

FIG. 12 is a partially cutaway perspective view of a fixing bracket of another embodiment of the door reinforcing member.

13 is a partial cross-sectional view showing a structure for preventing a recoil of an airbag door in which a door reinforcing member constituted by a fixing bracket shown in FIG. 12 is implemented, wherein (a) is a state before the airbag door is opened; (B) shows a state in which the opened airbag door has collided with a part around the door.

FIG. 14 is a perspective view showing a door reinforcing member mounted on the back side of an airbag door formed on the panel substrate, with the panel substrate partially cut away.

FIG. 15 is a sectional view taken along line YY of FIG. 14;

FIG. 16 does not take measures to prevent the airbag door from rebounding, so that each door panel portion opened by receiving a strong pressing force of the airbag collides with a peripheral portion of the door supported by the fixing bracket. FIG. 9 is an explanatory cross-sectional view showing that there is a danger that the vehicle will bounce back due to recoil, impair the occupant protection function of the airbag, or induce a secondary disaster due to an occupant collision.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Instrument panel (vehicle interior member) 12 Airbag door 13 Door panel part 14 Door panel part 18 Door peripheral part 20 Airbag device 22 Airbag 25 Door reinforcement member 28 Cylindrical part 40 Expected breakage part 41 Deformation allowance part 42 Contact area 46 slit

Claims (3)

[Claims] 1. A door panel provided on a vehicle interior member (10).
The door peripheral portion (18) of (13, 14) is supported from behind by a door reinforcing member (25) connected to an airbag device (20) disposed inside the vehicle interior member (10), and When the pressing force accompanying the inflation of the bag (22) acts on the back surface of the door panel portion (13, 14), the door peripheral portion (18) is prevented from floating outward and the opened door panel portion is opened. (13, 14) in the airbag door (12) which prevents damage to the door peripheral part (18) when it collides with the door peripheral part (18); A rupture scheduled portion (40) that is broken by the impact when the door panel portion (13, 14) collides, and is provided on a wall surface of a cylindrical body (28) in the door reinforcing member (25), A deformation permitting portion (41) for permitting compressive deformation of the cylindrical portion (28) when the door panel portion (13, 14) collides with the door peripheral portion (18) and an impact force is applied. The said When the panel parts (13, 14) collide with the door peripheral part (18), the door peripheral part (18) is broken by the breakage of the part to be broken (40) and the compression of the cylindrical body part (28). A structure for preventing the airbag door from rebounding, wherein the airbag door is deformed downward, thereby absorbing a shock at the time of a collision and preventing the door panel portions (13, 14) from rebounding. 2. The breakable portion (40) is formed along a side edge of a contact area (42, 42) where the door panel portion (13, 14) collides in the door peripheral portion (18). 2. The structure for preventing the airbag door from rebounding according to claim 1. 3. The deformation permitting portion (41) includes the cylindrical portion (28).
2. A structure for preventing the airbag door from rebounding, comprising a slit (46) extending to a required length in the circumferential direction of the airbag door.