JP4330379B2 - Airbag device for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention protects an occupant in a vehicle such as a passenger seat or a driver's seat from the impact of a frontal collision or a side collision at the time of a collision of a vehicle such as an automobile, and ensures the safety of the occupant. In particular, the present invention relates to an improvement in the mounting structure of the reinforcing member at the break opening portion.
[0002]
[Prior art]
Airbag devices for passenger seats, driver's seats, and left and right side pillars applied to vehicles such as automobiles are basically an air bag and an air bag case that accommodates the air bag in a folded state. An inflator for inflating and deploying the air bag is provided, and the air bag device is arranged inside the vehicle interior panel.
The interior panel of an automobile is generally composed of an instrument panel made of a plastic resin such as a polypropylene resin that covers the surface of a panel core integrally formed of a plastic resin material such as a polypropylene resin.
[0003]
2. Description of the Related Art As a conventional automobile airbag device, there is provided a seamless type airbag device for a passenger seat that makes it difficult to see a breaking groove that becomes a fragile portion of a breaking opening portion as shown in FIGS.
That is, in FIG. 1 and FIG. 2, a laser generated in a pulse form from a laser generating means (not shown) is folded on the interior panel 10, and a pair of metal plate materials fixed to the back surface from the back surface side of the interior panel 10 are folded. Irradiated while relatively moving along the outer edges of the curved reinforcing plate members 11, 11, the longitudinal front and rear hinge grooves 10a formed in a direction perpendicular to the back surface of the interior panel 10 and the center By providing the breaking groove 10b and the breaking groove 10c in the short direction, the breaking opening part 14 for inflating and deploying the airbag corresponding to the size of the opening part 13a of the airbag case 13 for accommodating the airbag 12 is formed. Yes.
Further, the break opening portion 14 becomes front and rear break opening portions 15a and 15b by a central breaking groove 10b and short left and right breaking grooves 10c and 10c formed in the longitudinal direction, respectively, and when the airbag is inflated and deployed, , And the rear hinge grooves 10a, 10a are configured to be opened in a double-spread state.
[0004]
When the break open part 14 of the interior panel 10 is opened by the deployment pressure of the airbag 12 when the airbag is inflated and deployed, the front and rear hinge grooves 10a may be separated from the interior panel 10. Therefore, one end horizontal portions 11a and 11a of the pair of reinforcing plate members 11 and 11 are caulked and fixed to the back surface of the fracture opening portion 14 of the interior panel 10 by means of welding or the like, and the vertical portions serving as the other ends thereof 11b and 11b are bent and suspended via hinges 11c and 11c, and each of the vertical parts 11b and 11b has an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 13a of the airbag case 13. The front and rear walls of the frame-shaped reinforcement mounting portion 16 integrally formed on the back surface of the interior panel 10 and the hook portions 17 attached to the front and rear wall surfaces 13b and 13b of the case 13 are engaged. By doing so, the fracture opening part 14 of the interior panel 10 that is opened in the air bag expansion and deployment is prevented from scattering.
In order not to obstruct the opening of the front and rear break open portions 15a and 15b, the hook engaging holes 11d and 11d of the vertical portions 11b and 11b at the other ends of the pair of reinforcing plate members 11 and 11 are formed. It is set to be large, and the front and rear break open portions 15a and 15b can be opened and the vertical portions 11b and 11b can be moved upward to absorb the inflation pressure when the airbag is inflated and deployed. ing.
[0005]
In the automotive airbag device configured as described above, when a vehicle collides, the impact force at the time of the collision is detected by a sensor, and the impact force detected by this sensor becomes a predetermined value or more. A control device comprising a CPU or the like, and when it is determined that the value is equal to or greater than a set value, the inflator is operated by a signal output from the control device to generate a predetermined gas, and this gas is supplied to the airbag. As a result, the airbag is rapidly inflated and deployed.
[0006]
That is, when the air bag is inflated and deployed, the breaking open portion 14 of the interior panel 10 is pressed from the inside by the pressure, the breaking grooves 10b and 10c of the break open portion 14 are broken, and the front and rear hinges It is developed in a double-speech state through the groove 10a. Then, the front and rear break opening portions 15a and 15b are deployed through the hinge portions 11c and 11c of the reinforcing plate members 11 and 11, respectively, before being deployed in the double-opening state.
At the same time, the airbag 12 is inflated and deployed from the opened break opening 14 to the outside of the interior panel 10, and the cushion or the cushion of the airbag 12 is inflated and deployed, so that the passenger's head or chest of the passenger seat By supporting the above, the occupant is protected from the impact force at the time of the vehicle collision.
[0007]
[Problems to be solved by the invention]
By the way, in the above-described automobile airbag device, a reinforcing attachment portion 16 having a rectangular horizontal section is integrally formed on the lower back surface of the opening periphery of the interior panel 10 where the fracture opening portion 14 is provided. And the left and right walls are formed into a substantially rectangular cylinder.
[0008]
However, as shown by the alternate long and short dash line in FIG. 3, when the airbag is inflated and deployed, the rapid inflation pressure of the airbag 12 is in the direction of arrow F1 with respect to the front and rear side walls 16a of the rectangular cylindrical shape, and the left and right side walls. 16b acts in the direction of arrow F2.
Accordingly, each corner portion 16c of the rectangular cylindrical reinforcing attachment portion 16 is subjected to a deformation reaction force inward in the direction of the arrow F3. In this state, the break opening portion 14 is opened, and as shown in FIG. 4, there is a problem in which the brush phenomenon S occurs in the corner break portion of the break opening portion 16 corresponding to each corner portion 16 c.
[0009]
Further, in the initial stage of inflation of the airbag when the airbag device is activated, the inner side of the reinforcing mounting portion 16 is deformed by being pushed outward, and a crack is generated in the corner of the edge of the opening portion of the interior panel 10 or the opening is opened. There is also a problem that the outer periphery of the interior panel 10 is damaged due to deformation of the periphery.
[0010]
The present invention has been made to solve the conventional problems described above, an object of the present invention absorbs the deployment pressure to be applied to fracture opening and the opening peripheral region, a sharp fracture surfaces or resulting edge, to prevent the phenomenon burrs rupture portion occurs, it is possible to clean fracture surface, addition, automotive air bags you prevent cracking by reducing the spread of the opening peripheral edge of the interior panel To provide an apparatus.
[0011]
[Means for Solving the Problems]
According to a first aspect of the present invention in order to achieve the object is disposed on the back side of the interior panel provided in a room of an automobile, folded Rue Ah bag is inflated and deployed by the gas from the inflator An air bag case that is stored in an open state, and a break opening portion formed by forming a break groove for determining the opening shape for air bag deployment on the back surface of the interior panel opposite to the opening of the air bag case; in the air bag device for a motor vehicle with fixed and the reinforcing frame body air bag case Ru is connected to the rear surface of the interior panel, said reinforcing frame body, prior to correspond to the opening of the air bag case, the rear wall A frame main body formed in a rectangular cylindrical shape by the left and right side walls, and the fracture by joining to the back surface of the interior panel provided integrally with the upper end of the frame main body And breaking the reinforcing portion for reinforcing the discharge portion, and a rim reinforcing part for reinforcing the peripheral area of the fracture-opening section by bonding a back surface of the instrument panel provided integrally on the upper end of the frame body, the rectangular each corner portion of the tubular frame body, said deformation preventing means for reducing the deformation of each corner portion due to the inflation pressure of the air bag occurring during inflation and deployment of the air bag is provided, the edge reinforcement portion, The frame main body is provided to extend outward in the horizontal direction through an inclined portion extending obliquely upward from the upper end of the frame main body, and the upper ends of the front and rear side walls. Between the rupture reinforcement part facing this, it extends over the entire length of the front and rear side walls, and extends from the upper end toward the inside of the frame body to bend in a wave shape. It is connected through a hinge extension portion .
[0012]
According to a second aspect of the present invention, in the automobile airbag device according to the first aspect, the frame body has a locking portion, and the airbag case is connected to the engagement member via a hook portion provided in the airbag case. It is connected with a stop part, It is characterized by the above-mentioned.
[0013]
According to a third aspect of the present invention, in the automobile air bag apparatus according to the first aspect, the deformation preventing means is provided at each corner of the reinforcing frame that intersects the front and rear side walls with the left and right side walls. There, characterized in that it consists of a curved portion protruding outward.
[0014]
According to a fourth aspect of the present invention, in the automobile airbag device according to the first aspect, the deformation preventing means cuts out a desired length of a joint portion at each corner of the reinforcing frame that is joined to the back surface of the interior panel. It is characterized by comprising a cutout portion.
[0015]
The invention of claim 5 includes the air bag device for an automobile according to claim 1, wherein the frame body, the breaking reinforcing portion, said edge reinforcement portion, the inclined portion and the hinge portion The reinforcing frame is formed by integral molding with a low-elasticity thermoplastic resin material made of an olefin-based elastomer or the like.
[0016]
According to a sixth aspect of the invention, the air bag device for an automobile according to any one of claims 1 to 4, each pair facing surfaces of the fracture reinforcing portion and the edge reinforcement portion against toward the interior back of the panel Are formed with protruding portions of streak projecting at predetermined intervals, and the fracture reinforcing portion and the edge reinforcing portion are joined to the back surface of the interior panel by vibration welding via these protruding portions. To do.
[0017]
According to a seventh aspect of the invention, the automotive air bag system according to any one of claims 1 to 4, the surface against toward the back surface of the interior panel of the broken reinforcement portion and the edge reinforcement portion, Protruding portions of vibration welding formed in predetermined intervals are formed, and the fracture reinforcing portion and the edge reinforcing portion are joined to the back surface of the interior panel by vibration welding through these protruding portions. And
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of an automobile airbag device according to the present invention will be described with reference to the drawings.
FIG. 5 is a longitudinal sectional view of the main part when the air bag apparatus for automobiles according to the present invention is applied to a passenger seat, FIG. 6 is an overall perspective view of the reinforcing frame in FIG. 5, and FIG. 7 is a bottom view of FIG. It is operation | movement explanatory drawing of the seen reinforcement frame.
[0019]
In FIG. 5, reference numeral 40 denotes a resin instrument panel cover (hereinafter referred to as an interior panel) integrally molded from a thermoplastic resin such as polypropylene resin (PP) as a main raw material. The instrument panel core (not shown) made of resin is fixed to the instrument panel core, and is fixed to the instrument panel core by an appropriate means such as a tapping screw.
[0020]
As shown in FIG. 5, a housing portion 42 for housing an automotive airbag device 41 is formed at an inner portion of the left side portion of the interior panel 40 facing the passenger seat (corresponding to a right-hand drive vehicle). In the case of a left-hand drive vehicle, it is provided on the right side opposite to the above configuration.
[0021]
The automobile airbag device 41 includes an airbag 43 that is inflated and deployed by gas from an inflator, and an airbag case having a rectangular opening 44a that is open and accommodates the airbag 43 in a folded state. 44, a frame main body 46 constituting a reinforcing frame 45 formed using a thermoplastic resin material similar to the interior panel 40, and a pair of break-opening formed by branching to the upper portion of the frame main body 46 It consists of break reinforcing portions 47a and 47b for the part and an edge reinforcing portion 48 for the peripheral edge of the opening of the break open portion.
[0022]
The frame body 4 6, prior to correspond to the opening 44a of the air bag case 44, the rear wall 46a, 46b and left and right side wall 46c, is formed in a rectangular tubular shape by and 46d, of the frame body 46 rectangular In the upper part of the side wall of the shape, an inclined part 46e provided obliquely upward and extending outward from the upper part of the side wall of the frame body 46 is provided to extend horizontally to the frame body 46, and this The edge reinforcing portion 48 whose four circumferential surfaces are almost horizontal is formed through the inclined portion 46e. Further, hinge extension allowance portions 49 that are branched from the base portion of the inclined portion 46e of the edge reinforcing portion 48 and bent in a wave shape are provided on the upper portions of the front and rear side walls 46a and 46b, respectively. This hinge extension part 49 connects between the upper end of the front and rear side walls and the fracture reinforcing part opposite thereto , extends over the entire length of the front and rear side walls, and extends from the upper end. The frame body is formed in a shape that extends inward and bends in a wave shape. Further, each corner portion (corner portion) of the rectangular cylindrical frame main body 46 is provided with a deformation preventing means 60 for reducing deformation due to the inflation pressure of the airbag generated when the airbag is inflated and deployed.
[0023]
The deformation preventing means 60 is curved so that the connecting portions of the side walls 46a, 46c, 46b, 46d protrude outward at the corners where the front and rear side walls 46a, 46b intersect the left and right side walls 46c, 46d. It is comprised by the part 60a.
[0024]
As a modification of the deformation preventing means 60, as shown in FIG. 8, the interior panel 40 at each corner 46f of the frame body 46 where the front and rear side walls 46a and 46b intersect the left and right side walls 46c and 46d intersect. also form structure of the joint portion between the back surface at the cutout portion 61 cut the desired length, it is possible to reduce the deformation due to the inflation pressure of the air bag occurring during inflation and deployment of the air bag.
[0025]
The frame main body 46, the integrally formed edge reinforcing portion 48, and the fracture reinforcing portions 47a and 47b are integrally formed by injection molding using a low-elasticity thermoplastic resin material such as an olefin elastomer.
[0026]
Further, on the corresponding surfaces of the edge reinforcing portion 48 and the breakage reinforcing portions 47a and 47b corresponding to the back surface of the interior panel 40, there are formed protruding portions 50 of tearing streaks protruding at predetermined intervals. The protrusions 50 are fixed to the back surface of the interior panel 40 by vibration welding.
[0027]
In addition, the interior panel 40 facing the housing portion 42 is formed with a break open portion 51 that is broken and opened by the pressing force of the airbag when the airbag 43 is inflated and deployed.
[0028]
The break opening 51 includes a hinge groove 40a provided along the back and left and right longitudinal direction of the interior panel 40 and a side break groove 40c provided along the front and rear short direction substantially the same as the opening 44a of the airbag case 44. It is configured by forming into a rectangular shape by laser processing or the like, and extends in the short direction of the break opening portion 51, that is, in the middle of the side break groove 40c, over the entire length of the break opening portion 51 in the long direction. The central breaking groove 40b is formed by laser processing or the like, and when the airbag 43 is inflated and deployed, the breaking opening 51 is broken from the side breaking groove 40c and the central breaking groove 40b. It is separated into the breaking open parts 51a and 51b before and after the unfolded state is expanded through the hinges 52 and 52 constituted by 40a.
[0029]
A plurality of square hole-shaped engaging portions 53 are formed on the front and rear side walls 46 a and 46 b in the longitudinal direction of the frame body 46, and hook portions 54 attached to the front and rear side walls of the airbag case 44 are provided. It is designed to be locked.
[0030]
In the embodiment of the present invention, the reinforcing frame body 45 and the rupture reinforcing portions 47a and 47b are integrally formed. Therefore, when the airbag is inflated and deployed, it is applied to each corner of the reinforcing frame body 45 at the initial stage of deployment. By suppressing the deformation due to the inflation pressure of the air bag in a small amount, deformation of the break opening portion can be prevented, the break opening portions 51a and 51b can be smoothly developed, and the brush phenomenon S occurring in the break portion can be eliminated.
[0031]
An airbag case 44 that houses an airbag 43 is disposed below the reinforcement frame 45, and a hook portion 54 is provided on the side wall of the case upper end opening 44a. The locking portion 53 is locked through. An inflator (not shown) for supplying gas to the airbag 43 is disposed at the lower end of the airbag case 44.
The airbag case 44 is fixed to a vehicle-side fixing member such as a cross member 56 by a bolt nut 56 a via a support member 55.
[0032]
According to the airbag device for the passenger seat according to the embodiment of the present invention configured as described above, when a vehicle such as an automobile collides, the impact force at the time of the collision is not illustrated by a well-known sensor. Whether the impact force detected by the sensor is equal to or greater than a predetermined value is determined by a control device including a well-known CPU or the like (not shown), and is output from the control device when it is determined to be equal to or greater than a set value. In response to this signal, a well-known inflator (not shown) is operated to generate a predetermined gas, and this gas is supplied to the airbag 43, whereby the airbag 43 is rapidly inflated and deployed.
[0033]
When the airbag 43 is inflated and deployed, if the pressure generated at the initial stage of inflation and deployment of the airbag 43 is applied to the horizontal surfaces of the fracture reinforcing portions 47a and 47b and the inside of the reinforcing frame 45, the corners of the reinforcing frame 45 are Although a pressure that causes deformation is applied, the expansion pressure can be reduced by the deformation preventing means 60 provided on the reinforcing frame 45, and therefore, the phenomenon of occurrence of tearing that tends to occur on the fracture surface can be prevented.
Further, since the frame main body 46 and the edge reinforcing portion 48 are connected to each other by an inclined portion 46e extending obliquely upward from the upper side wall of the frame main body 46 to the outside, the expansion with respect to the reinforcing frame body 45 is performed. In addition, since the edge reinforcing portion 48 is pulled inward and downward, the expansion of the opening peripheral edge of the interior panel 40 can be reduced to prevent cracking . Further, the fracture opening portions 51a and 51b welded to the horizontal surfaces of the fracture reinforcement portions 47a and 47b are sequentially broken from the weak portion of the central fracture groove 40b to the weak portion of the side fracture groove 40c. The horizontal portions of the breakage reinforcement portions 47a and 47b including the subsequent breakage release portions 51a and 51b are developed through a hinge extension portion 49 having a wavy bent portion, and the breakage release portion 51 and the breakage reinforcement portions 47a and 47b. The excessive pressure resistance applied to the welded portion can be absorbed.
[0034]
In the final deployment stage, the pressure can be absorbed also by the gap of the square hole-shaped locking portion 53 of the frame main body 46, so that the damage generated on the peripheral edge of the opening of the interior panel 40 can be prevented. Is done.
[0035]
According to this embodiment, the deformation pressure applied to each corner (corner) of the reinforcing frame 45 in the initial stage when the airbag is inflated and deployed is alleviated by the deformation preventing means 60, and before and after the fracture opening 51, Since the left and right open peripheral areas of the four surroundings are welded to the edge reinforcing portion 48 of the reinforcing frame body 45, it is suppressed from following the opening operation of the breaking opening portion 51 and is quickly broken by the breaking groove 46 c. Thus, it is possible to prevent a sharp edge from occurring on the fractured surfaces of the fractured open portions 51a and 51b that are fractured when the airbag 43 is inflated and deployed, or to cause a crushing phenomenon at the fractured portions, thereby providing a beautiful fractured surface.
[0036]
Furthermore, since the peripheral area of the opening of the break open part 51 is reinforced by the edge reinforcing part 48 of the reinforcing frame body 45, the pressure resistance increases against the pressing force from above the interior panel 40 including the break open part 51, It is possible to prevent deformation such as cracking and distortion of the interior panel 40 when the air bag device is not used.
[0037]
Further, according to this embodiment, the interior panel 40 and the reinforcing frame body 45 are made of a similar thermoplastic resin material, and the edge reinforcing portion 48 of the reinforcing frame body 45 corresponding to the interior panel 40 is broken. Since the vibration welding is performed on the corresponding surfaces of the reinforcing portions 47a and 47b via the protruding portions 50 of the tearing streak, the welding operation can be easily performed without causing deformation of the welding portion due to heat.
[0038]
Further, since the air bag case 44 is configured to be separably coupled to the reinforcing frame body 45, the air bag case 44 can be easily detached from the reinforcing frame body 45 when the vehicle is scrapped. The related parts such as the inflator can be easily separated and removed, and adverse effects on the environment can be prevented.
[0039]
In the embodiment, the hinge groove 40a and the breaking grooves 40b and 40c are formed by forming the weakened portion by laser processing from the back surface side of the interior panel 40. However, the present invention is not limited thereto, and the milling groove is not limited thereto. Of course, it can also be formed by machining or die machining. In the case of milling groove machining, it is cut from the back side of the interior panel, and the thickness on the surface side of the interior panel is in the range of 0.5 mm to 0.8 mm. It is advisable to provide a remaining amount. In addition, there is a method such as integral molding when the surface panel is molded.
[0040]
【The invention's effect】
According to the automotive airbag apparatus configured as described above, the reinforcing frame body is formed in a substantially rectangular cylindrical shape by the front, rear side walls, the left side, and the right side wall, and the airbags are formed on the front and rear side walls. Deformation preventing means for reducing the deformation due to the inflation pressure of the airbag that occurs when the airbag is inflated and deployed at each corner of the rectangular tubular reinforcing frame body so that the case can be detachably connected. Since it is provided, it absorbs the development pressure applied to the fracture opening and the surrounding area of the opening to prevent sharp edges on the fracture surface and the occurrence of a squealing phenomenon on the fracture surface. An automobile airbag device can be provided.
In addition, the edge reinforcing portion is provided to extend horizontally outward from the frame main body through an inclined portion that extends obliquely upward from the upper end of the frame main body to the outside. The influence of expansion on the reinforcing frame is small, and further, the edge reinforcing portion is pulled inward and downward, so that the opening peripheral edge of the interior panel can be reduced to prevent cracking.
[0041]
Further, at the time of recycling, it is possible to omit the work of separating the metal frame and the reinforcing plate material and the resin interior panel one by one as in the prior art.
Furthermore, since the air over bag case is in separably connected can configure for the reinforcement frame, the air bag, such as during scrap can be easily removed from the frame body, facilitate the related parts such as inflators Can be separated and removed, and has the effect of preventing adverse effects on the environment.
[0042]
[Brief description of the drawings]
FIG. 1 is a partially enlarged explanatory view showing a state in which a break opening portion for inflating and deploying an airbag is formed on a single-panel interior panel of a conventional passenger airbag device.
FIG. 2 is a schematic sectional view taken along line AA in FIG.
FIG. 3 is an explanatory view of a main part showing a bottom surface of the reinforcing mounting frame of FIG. 2;
4 is a cross-sectional view of a principal part showing a state in which a brushing phenomenon occurs in a hinge part of a fracture opening part in FIG. 2;
FIG. 5 is a longitudinal sectional view of an essential part showing an embodiment in which an automobile airbag device according to the present invention is applied to a passenger seat.
6 is an overall perspective view of a reinforcing frame body in FIG. 5. FIG.
7 is an operation explanatory view of the reinforcing frame body of FIG. 6 according to the present invention as seen from the bottom surface side.
FIG. 8 is a perspective view of a principal part showing a modification of the deformation preventing means formed on the reinforcing frame according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 40 Interior panel 40a Hinge groove 40b Center breaking groove 40c Side part breaking groove 41 Automotive airbag apparatus 42 Housing part 43 Air bag 44 Air bag case 45 Reinforcement frame body 46 Frame main body 47a, 47b Breaking reinforcement part 48 Edge reinforcement part 49 Hinge extension part 50 Projection part 51 Break opening part 53 Square hole-shaped locking part 54 Hook part 60 Deformation prevention means 61 Notch part

Claims (7)

It is disposed on the back side of the interior panel provided in a room of an automobile, and an air bag case for housing in a folded state is inflated and deployed Rue earth bag by the gas from the inflator, opposing the opening of the air bag case wherein a fracture-opening section formed by forming a breaking groove which determines the opening shape for the air bag deployment to the back surface of the interior panel, said fixed to the back surface of the interior panel said reinforcing frame airbag case Ru is connected to In an automotive airbag device with a body,
The reinforcing frame body is formed integrally with a frame main body formed in a rectangular cylindrical shape by front, rear side walls, left and right side walls corresponding to the opening of the airbag case, and the interior of the frame main body. A rupture reinforcing portion that reinforces the rupture opening portion by bonding to the back surface of the panel, and a peripheral region of the rupture opening portion that is integrally provided at the upper end of the frame body and bonded to the back surface of the interior panel. An edge reinforcing portion,
Wherein each corner portion of the rectangular tube-shaped frame body, means for preventing deformation to reduce the deformation of the respective corner portions due to the expansion pressure of the air bag occurring during inflation and deployment of the air bag is provided,
The edge reinforcing part is provided to extend horizontally outward from the frame body through an inclined part provided to extend obliquely upward from the upper end of the frame body ,
Between the upper ends of the front and rear side walls and the rupture reinforcing part opposite to the upper end, the entire length of the front and rear side walls extends, and extends from the upper end toward the inside of the frame body. It is connected via a hinge extension portion having an extension allowance that bends in a wavy shape ,
An automotive airbag device characterized by the above. 2. The automobile air according to claim 1, wherein the frame body has a locking portion, and the airbag case is connected to the locking portion via a hook portion provided in the airbag case. Bag device. It said deformation preventing means, front and rear side wall and the left, in the corner portions of the reinforcing frame member at the intersection of the right side wall, characterized in that it is composed of a curved part that each side wall is protruded outward The automobile airbag device according to claim 1. 2. The automobile according to claim 1, wherein the deformation preventing means is constituted by a notch portion in which a joint portion of each corner portion of the reinforcing frame body joined to the back surface of the interior panel is cut out by a desired length. Air bag device. Said frame body, wherein the rupture reinforcing portion, said edge reinforcement portion, characterized in that formed by integrally molding by the inclined portion and the reinforcing frame body thermoplastic resin material of a low elasticity composed of such olefinic elastomer containing the hinge portion automotive air bag device according to any one of claims 1 to 4. Wherein each of the respective pairs facing surfaces of fracture reinforcing portion and said edge reinforcing portions at predetermined intervals to form a protrusion of the muscle strip which projects against toward the interior back of the panel, said breaking through these protrusions automotive air bag device according to any one of claims 1 to 4, the reinforcement portion and the edge reinforcement portion is characterized in that it is joined by vibration welding in the interior back of the panel. Wherein the surface against toward the back surface of the fracture reinforcing portion and the interior panel of the edge reinforcement portion forms a protrusion of the vibration welding of the cross-sectional裂筋shape formed at predetermined intervals, through these projections The automobile airbag device according to any one of claims 1 to 4, wherein the fracture reinforcing portion and the edge reinforcing portion are joined to the back surface of the interior panel by vibration welding .

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