JP4426878B2 - Airbag device for automobile - Google Patents

Description

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 the improvement of the breaking groove in the opening portion of the breaking.
Hereinafter, the breaking groove and hinge groove for cleavage in the present invention are openings formed by continuous opening formed by laser irradiation processing generated in a pulse form from laser generating means from the back side of the interior panel of an automobile. The fracture | rupture part for a deep cleavage and the weak hinge part with a shallow opening depth are shown.

Airbag devices for passenger seats, driver's seats, and left and right columns 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.
An interior member of an automobile is generally composed of a panel core integrally formed of a plastic resin material such as polypropylene resin, and an instrument panel (hereinafter referred to as an interior panel) formed of a plastic resin disposed on the surface side of the panel core. Panel).

  As a conventional automobile airbag device, there is provided a seamless type airbag device for a passenger seat in which the fracture grooves 10a, 10b, and 10c of the fracture opening portion 14 as shown in FIGS. That is, in FIGS. 1 and 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 right and left short breaking grooves 10c, 10c, a breaking opening 14 for inflating and deploying the airbag corresponding to the size of the opening 13a of the airbag case 13 for housing the airbag 12. Is formed.

  Further, the break open portion 14 becomes front and rear break open portions 15a and 15b by the central break groove 10b formed in the long direction and the left and right break grooves 10c and 10c in the short direction, when the airbag 12 is inflated and deployed. These are configured to be opened in a double-spread state through the front and rear hinge grooves 10a and 10a, respectively.

  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 portion 11b serving as each other end thereof. , 11b are bent and suspended via hinges 11c, 11c, and each of the vertical portions 11b, 11b has an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 13a of the airbag case 13. Hooks attached to the front and rear wall surfaces 13b and 13b of the case 13 through square holes 16a formed on the front and rear walls of the frame-shaped reinforcing ribs 16 integrally formed on the back surface of the interior panel 10. By adopting a configuration in which 17 is engaged, the fracture opening portion 14 of the interior panel 10 that has been opened with two doors when the airbag is inflated and deployed 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 a large size, and the front and rear break open portions 15a and 15b are opened, and the vertical portions 11b and 11b can be moved upward to absorb the deployment pressure when the airbag is inflated and deployed. ing.

  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.

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 air bag 12 is inflated and deployed from the opened break opening portion 14 to the outside of the interior panel 10, and the cushioning action of the inflated and deployed air bag 12 causes the passenger's head or chest of the passenger seat Etc., so as to protect the occupant from the impact force at the time of vehicle collision.
JP 2001-206180 A

  By the way, in the above-described automobile airbag device, the front and rear, left and right wall surfaces of the rectangular cylindrical frame main body welded to the lower back surface of the opening periphery of the interior panel 10 where the fracture opening 14 is provided are the interior panels. 10 is formed in a rectangular tube shape that is perpendicular to the back surface and that the upper and lower widths of each wall surface have a parallel width W1 as shown in FIG. Therefore, when the air bag is inflated and deployed, the outer surface of the inflated air bag exerts a considerable pressing force on each inner wall surface of the reinforcing frame, and the opening of the break opening portion to which a strong inflation pressure is applied. There has been a problem that the edge portion has a crack and the appearance is not good.

  Further, since the material of the interior panel 10 is formed of a hard plastic resin material such as polypropylene resin, there is little elasticity, and the interior panel 10 breaks due to the inflation pressure applied at the initial stage of inflation of the airbag due to the operation of the airbag device. Cracks are likely to occur at the corners of the opening edge, and there may be problems such as debris scattering.

  Furthermore, in the initial stage of inflation of the airbag, the airbag that is about to be inflated suddenly receives a stress (reaction force) in the vicinity of the upper part of each inner wall surface of the frame body, and the smooth inflation operation is hindered. As a result, the inflating speed is lowered, and there is a possibility that the safety of passengers is hindered.

The present invention has been made to solve the conventional problems as described above, the air bag inflation operation during the operation of the e earth bag device was carried out smoothly, resulting in the opening edge portion of the fracture-opening section, crevices The purpose is to eliminate defects such as cracks.

  In addition, vibration welding can be easily performed by using the same material for the interior panel and the reinforcing frame body, facilitating assembly, and the interior panel's fracture opening and the outside of the opening near the outer peripheral edge An object of the present invention is to provide an automobile air bag device that improves pressure resistance against pressure load from the vehicle.

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 for accommodating in a state having an opening on the back surface opposite to the upper end of the interior panel's, are formed on the back surface of the interior panel to the opening and opposite of the air bag case opening for air bag deployment a fracture-opening section plan view shape that determines the shape exhibits a rectangular, composed of the fracture-opening section of the circumference is arranged on the rear surface of the interior panel at a position corresponding to the side region thermoplastic polyolefin soft resin (TPO) comprising a reinforcing frame body, said fracture-opening section, prior to the rectangular, before respectively provided on the long sides after, and a pair of hinge grooves after the rectangular left, it on the short side of the right A side breaking groove and a central breaking groove provided on a line connecting the left and right short sides of the rectangle, and the breaking opening portion is formed by the inflation of the airbag. In the automotive airbag device that is divided and broken into front and rear breaking open portions along the breaking groove and the central breaking groove and is opened by a double door opening method with the front and rear hinge grooves as fulcrums, the reinforcing frame body Is a frame main body that has a length that reaches the opening of the airbag case from the back surface of the interior panel and that has a rectangular cylindrical shape corresponding to the plan view shape of the fracture opening, and the interior panel of the frame body A reinforcing edge that reinforces the peripheral area of the break open part from the back surface of the interior panel and extends from the upper end to the outside of the frame body at the upper end on the side; Bottom open Has an inner peripheral dimension into which the opening of the airbag case can be inserted, and an inner peripheral dimension of the upper end opening on the interior panel side of the frame body is larger than an inner peripheral dimension of the lower end opening, and A cross-sectional area in a direction perpendicular to the length direction is formed so as to increase from the lower opening toward the upper opening, and the opening of the airbag case is coupled to the lower opening of the frame body. Features.

According to a second aspect of the invention, the air bag device for a vehicle according to claim 1, wherein the front, the fracture-opening section after a pair of reinforcing plate members for reinforcing each from the rear surface of each of fracture-opening section, wherein the reinforcing plate Is a horizontal portion bonded to the back surface of each break open portion, and is connected to the horizontal portion near the hinge groove of the break open portion via a hinge portion at an angle along the front and rear wall inner surfaces of the frame body. It has a bent portion bent downward, and the hook portion of the airbag case is locked to a plurality of square holes respectively formed corresponding to the front and rear walls of the frame body and the bent portions. It is characterized by that.

The invention according to claim 3, in an air bag system for an automobile according to claim 2, in the plane corresponding to the rear surface side to the interior panel of the horizontal portion of the reinforcing edge and the reinforcing plate of the reinforcement frame are respectively a predetermined distance And the reinforcing edge portion and the horizontal portion are fixed to the back surface of the interior panel by vibration welding through the protruding portions.

The invention of claim 4 is disposed on the back side of the interior panel provided in a room of an automobile, housed in a folded state is inflated and deployed Rue earth bag by the gas from the inflator backside facing the interior panel fracture-opening of an air bag case having an aperture at an upper end of a plan view shape that determines the opening shape for the formed on the back surface of the interior panel to the opening and opposite the air bag case air bag deployment exhibits a rectangular comprising a part, a reinforcing frame body consisting of the fracture-opening section of the circumference is arranged on the rear surface of the interior panel at a position corresponding to the side region thermoplastic polyolefin soft resin (TPO), the fracture-opening section, One hinge groove provided on the front long side of the rectangle, a side breaking groove provided on each of the left and right short sides of the rectangle, and a rear long side of the rectangle And the rear opening portion of the air bag is ruptured forward along the side portion breaking groove and the rear side breaking groove by the inflation of the airbag, and the hinge groove serves as a fulcrum. In the automotive airbag device that is opened in a manner, the reinforcing frame body has a length that reaches the opening side upper end of the airbag case from the back surface of the interior panel, and corresponds to the plan view shape of the breaking opening portion. A frame body that has a rectangular cylindrical shape, and is provided at the upper end of the frame body on the interior panel side so as to extend from the upper end to the outside of the frame body. The peripheral area of the fracture opening portion is reinforced from the back surface of the interior panel Having reinforcing edge to
The lower end opening of the frame body on the side of the airbag case has an inner peripheral dimension into which the opening of the airbag case can be inserted, and the inner peripheral dimension of the upper end opening on the interior panel side of the frame body is the inner periphery of the lower end opening. The cross-sectional area in a direction perpendicular to the length direction of the frame main body is formed so as to increase from the lower opening toward the upper opening, and the upper end on the opening side of the airbag case is It is connected to the lower opening of the frame body .

According to a fifth aspect of the present invention, in the automobile air bag device according to the fourth aspect of the present invention, the automotive airbag apparatus further comprises a reinforcing plate material that reinforces the break open portion from the back surface of the break open portion, and the reinforcing plate material is bonded to the back surface of the break open portion. A horizontal portion, and a bent portion that is connected to the horizontal portion via a hinge portion in the vicinity of the hinge groove of the fracture opening portion and is bent downward at an angle along the inner surface of the front side wall of the frame body, The hook portion of the airbag case is locked in a plurality of square holes formed corresponding to the front side wall of the frame main body and the bent portion, respectively.

According to a sixth aspect of the present invention, in the automobile airbag device according to the fifth aspect , the reinforcing edge of the reinforcing frame and the surface of the horizontal portion of the reinforcing plate material corresponding to the back surface side are respectively provided at predetermined intervals. And the reinforcing edge portion and the horizontal portion are fixed to the back surface of the interior panel by vibration welding through the protruding portions.

According to the automotive airbag device of the present invention configured as described above, the reinforcing frame has a length that reaches the upper end of the airbag case from the back surface of the interior panel and has a plan view shape of the fracture opening portion. And a frame main body having a rectangular tube shape corresponding to the above, and an inner panel side upper end of the frame main body extending from the upper end to the outside of the frame main body and reinforcing the peripheral area of the fracture opening from the rear surface of the inner panel It is composed of a reinforcing edge, and the lower end opening of the frame body on the side of the airbag case is formed to have an inner peripheral dimension into which the opening of the airbag case can be inserted, and the inner peripheral dimension of the upper end opening on the interior panel side of the frame body is opened at the lower end. an inner peripheral dimension to than larger, and since the cross-sectional area in the direction orthogonal to the longitudinal direction of the frame body is formed to expand as it goes to the upper opening from the lower opening, the initial operation of the air bag device The rupture opening part (opening lid) is smoothly developed by reducing the discharge rate of the airbag, and the opening operation of the breaking opening part is smoothly performed after the opening, and a tear is generated at the opening edge of the breaking opening part. It has the effect of preventing damage such as cracks.

  In addition, vibration welding can be easily performed by using the same material for the interior panel and the reinforcing frame body, and assembling is facilitated, and the fracture opening portion of the interior panel and the vicinity of the outer periphery of the opening are provided. The pressure resistance against the pressing load from the outside can be improved. Furthermore, in the vibration welding of both members, the reinforcing frame body can be easily inserted into the vibration welding jig.

  Next, an automotive airbag device according to the present invention forms a break opening portion at a desired position of an interior panel from a rear surface side of the interior panel by a laser irradiation process by means of a hinge groove and a fracture groove for cleavage. The embodiment is applied to an automobile airbag device in which a break opening portion is developed and opened in a double door opening method or a single opening method by expansion, and an embodiment in which a break opening portion is provided on a passenger seat side of an interior panel is described with reference to the drawings. I will explain.

FIG. 3 is a longitudinal sectional view of an essential part when applied to a passenger seat showing a first embodiment of an automotive airbag apparatus according to the present invention.
In FIG. 3, reference numeral 40 denotes a PP resin instrument panel cover (hereinafter referred to as an interior panel). The interior panel 40 is a resin instrument panel core (not shown) fixed to a vehicle body not shown. It is configured to cover the surface, and is fixed to the instrument panel core by appropriate means such as a tapping screw.

  As shown in FIG. 3, a housing portion 42 for housing an automobile airbag device 41 is formed in 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.

The automotive air bag system 41 includes an air bag 43 to be inflated and deployed by the gas from the inflator, accommodated in the folded state of the air bag 43, the air bag case 44 having an opening 44a in the upper end, the A rectangular cylindrical frame main body 45a having a reinforcing edge 45b for the opening periphery of the fracture opening 46 formed using a thermoplastic polyolefin-based soft resin (TPO) material having the same flexibility as the interior panel 40. A horizontal portion 47a having a reinforcing frame body 45 and bent portions 47b, 47b slidably disposed inside the frame main body 45a, and disposed opposite to each other at the upper portion. , 47a and a pair of reinforcing plate members 47.

The lower part of the frame main body 45a is formed in a rectangular cylindrical shape by front and rear side walls 45c, 45c and left and right side walls (not shown), and the inner surfaces of the front and rear side walls of the frame main body 45a are formed on the back surface of the interior panel 40. On the other hand, the upper opening 45d has an upper opening width W2 larger than the width W1 of the lower opening 45e in which the upper opening 45d has an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 44a of the airbag case 44 by being inclined. It is.
More specifically, as is apparent from FIG. 3, the lower end opening 45e on the airbag case 44 side of the frame body 45a has an inner peripheral dimension into which the opening 44a of the airbag case 44 can be inserted, and the interior of the frame body 45a. The inner peripheral dimension of the upper end opening 45d on the panel 40 side is formed larger than the inner peripheral dimension of the lower end opening 45e. Furthermore, the cross-sectional area in the direction orthogonal to the length direction of the frame main body 45a is formed so as to increase from the lower opening 45e to the upper opening 45d. Further, the opening 44a of the airbag case 44 is coupled to the lower opening 45e of the frame body 45a.

Further, the fracture-opening section 46, the longitudinal direction of the lateral direction in an elongated plan view shape (horizontal direction of the interior panel 10 shown in FIG. 1) has caused a rectangular, the fracture-opening section 46 of the interior panel 40 a perpendicular by the central fracture groove 40b of the front and rear is formed in the center of the direction fracture-opening section 46 is split broken back and forth, the prior, so as to open the double doors scheme rear fracture-opening section 46a, 46b is formed ing. Then, the front and rear fracture-opening section 46a, the horizontal portions 47a of the pair of reinforcing plate members 47 on the back side of 46b, 47a are welded so as to oppose the tip of each other. Further, the reinforcing plate members 47 are respectively disposed in the vicinity of the hinge grooves 40a and 40a of the front and rear fracture opening portions 46a and 46b via the hinge portions 47c and 47c, and the front and rear side walls 45c of the rectangular cylindrical frame body 45a. 45c have bent portions 47b and 47b bent downward at an angle along the inner surface, corresponding to the front and rear side walls 45c and 45c of the frame body 45a and the bent portions 47b and 47b, respectively. The hook portions 44b and 44b of the airbag case 44 are engaged with the formed square holes 45f and 47f.

Further, the protruding portions 50 and 51 of the tearing streak projecting at predetermined intervals on the corresponding surfaces of the reinforcing edge 45b of the frame body 45a and the horizontal portion 47a of the reinforcing plate 47 corresponding to the back surface of the interior panel 40, respectively. The reinforcing edge portion 45b and the horizontal portion 47a are fixed to the back surface of the interior panel 40 by vibration welding via the protrusion portions 50 and 51.

The break opening portion 46 includes a hinge groove 40 a provided along the left and right longitudinal direction of the interior panel 40 and a break groove for left and right side portions provided along the short direction before and after the interior panel 40 on the back surface of the interior panel 40. (not shown, corresponding to the left and right fracture grooves 10c shown in FIG. 1) constructed by the formation by laser processing or the like in a rectangular shape at a position slightly unfolded shape from the opening 44a of the air bag case 44 In the middle of the breaking grooves on the left and right side portions along the short direction of the breaking open portion 46, a central breaking groove 40b extending over the entire length in the long direction of the breaking open portion 46 is formed by laser processing or the like. Is formed.

In the first embodiment of the present invention, when the airbag 43 is inflated and deployed, the inflation pressure generated at the initial stage of inflation and deployment of the airbag 43 is caused by the horizontal portions 47a and 47a and the bent portions 47b and 47b of the reinforcing plate members 47 and 47. And when applied to the inner surface of the side wall of the frame main body 45a of the reinforcing frame 45, the lower end opening 45e on the airbag case 44 side of the frame main body 45a has an inner peripheral dimension into which the opening 44a of the airbag case 44 can be inserted and the frame. The inner peripheral dimension of the upper end opening 45d on the interior panel 40 side of the main body is formed larger than the inner peripheral dimension of the lower end opening 45e, and the cross-sectional area in the direction perpendicular to the length direction of the frame main body 45a is changed from the lower opening 45e to the upper opening 45d. can be reduced has become enlarged by structure Runode, the effect of the inflation pressure on the bent portion 47b of the reinforcing frame member 45 and the reinforcing plate 47 as it goes While preventing the crack of the opening periphery of the fracture | rupture opening | release part 46 of the interior panel 40, the excessive pressure resistance concerning the welding part welded to the back surface side of the interior panel 40 can be absorbed, and the front and back fracture | rupture opening | release parts 46a , 46b can be smoothly spread outward in a double-spread state.

  In addition, the front and rear, and the left and right opening peripheral regions of the break opening part 46 are reinforced by welding the reinforcing edge 45b of the reinforcing frame body 45. Therefore, the break opening part 46 broken when the airbag 43 is inflated and deployed. It is possible to prevent the occurrence of a sharp edge at the fractured portion of the material and to prevent the occurrence of the sasker phenomenon at the fractured portion, thereby providing a beautiful fracture surface.

  Further, according to the first embodiment, the interior panel 40 is made of PP resin, and the reinforcing frame body 45 is made of TPO resin having similar elasticity, and each of the reinforcing frame body 45 and the reinforcing plate member 47 is formed. Since vibration welding becomes possible through the streak projections 51 and 50 formed on the horizontal portion 47a and the reinforcing edge 45b, the welding operation is easy.

  Further, since the airbag case 44 is configured to be separably coupled to the reinforcing frame body 45 and the reinforcing plate member 47, the airbag case 44 can be easily detached from the reinforcing frame body 45 when the vehicle is scrapped. In addition, it is possible to easily separate and remove related parts such as inflators that become industrial waste, and to prevent adverse effects on the environment.

FIG. 4 is a longitudinal sectional view of an essential part of a reinforcing frame body showing a second embodiment of the automotive airbag apparatus of the present invention, and corresponds to FIG. 3 in the first embodiment.
In the second embodiment, the configuration different from the first embodiment is a double-spread type in which the first embodiment is divided into the front and rear break open portions 46a and 46b when the break open portion 46 is opened. On the other hand, in the break open portion 46 of the second embodiment, the break open portion 46 is a single-open type reinforcing frame 45, and the other configuration is substantially the same as that of the first embodiment, so Are denoted by the same reference numerals, description thereof is omitted, and differences will be described below.

  Also in the second embodiment, the interior panel 40 is made of PP resin, and the reinforcing frame 45 is formed by using a thermoplastic polyolefin soft resin (TPO) material having the same flexibility, and the fracture opening portion. 46 has a bent portion 47b slidably disposed on the inner surface of the front side wall 45c of a rectangular cylindrical frame main body 45a having an edge reinforcing portion 45b for the peripheral edge of the opening, and the rear surface of the fracture opening portion 46 on the upper side. And a reinforcing plate 47 having a horizontal portion 47a welded to the side.

The lower portion of the frame main body 45 is formed in a rectangular cylindrical shape by front and rear side walls 45c, 45c and left and right side walls (not shown), and the front and rear side walls of the frame main body 45a are the back surfaces of the interior panel 40. On the other hand, the upper opening 45d having an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 44a of the airbag case 44 has a larger upper spread width W2 than the lower opening 45e by attaching an inclined part. It has an opening shape.
That is, as is clear from FIG. 4, the lower end opening 45e on the airbag case 44 side of the frame body 45a has an inner peripheral dimension into which the opening 44a of the airbag case 44 can be inserted, and the interior panel 40 side of the frame body 45a. The inner peripheral dimension of the upper end opening 45d is formed larger than the inner peripheral dimension of the lower end opening 45e, and the cross-sectional area in the direction orthogonal to the length direction of the frame body 45a is enlarged from the lower opening 45e to the upper opening 45d. It is formed as follows.

Further, the break opening portion 46 is formed in a flat rectangular shape, has a hinge groove 40a on the front side by laser processing from the back surface side of the interior panel 40, and corresponds to the left and right break grooves 10c shown in FIG. And the rear side break opening groove 40b are formed, and when the airbag is inflated, it is opened in a single-open manner via the hinge groove 40a and the hinge portion 47c of the reinforcing plate 47. .

  The horizontal portion 47a of the reinforcing plate 47 welded to the back surface of the break opening portion 46 is in the vicinity of the hinge groove 40a of the reinforcing frame 45, and the front side wall 45b of the rectangular cylindrical frame body 45a via the hinge portion 47c. A plurality of bent portions 47b bent downward in an upwardly enlarged angle along the inner surface, and formed corresponding to the front and rear side walls 45c and 45c of the frame body 45a and the bent portions 47b, respectively. The hook portions 44b and 44b of the airbag case 44 are locked in the square holes 45f and 47f.

  Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

Also in the second embodiment having the above-described configuration, the lower end opening 45e on the airbag case 44 side of the frame main body 45a has an inner peripheral dimension into which the opening 44a of the airbag case 44 can be inserted, as in the first embodiment. The inner peripheral dimension of the upper end opening 45d on the interior panel 40 side of the frame body is formed larger than the inner peripheral dimension of the lower end opening 45e, and the cross-sectional area in the direction perpendicular to the length direction of the frame main body 45a is from the lower opening 45e to the upper opening 45d. Since the structure of the air bag 43 is enlarged as it goes , the air bag 43 can be inflated and deployed smoothly, and the sharp edge that can be formed in the ruptured portion of the ruptured opening portion 46, the occurrence of the phenomenon of sacrifice, etc. can be prevented. Can provide a beautiful fracture surface.

FIG. 5 is a longitudinal sectional view of an essential part of a reinforcing frame body showing a third embodiment of the automotive airbag apparatus of the present invention, and corresponds to FIG. 3 in the first embodiment described above.
In the third embodiment, the configuration different from the first embodiment is that the first embodiment is of a double-spread type in which the opening of the breaking opening 46 is divided into the front and rear breaking opening, and the breaking opening In contrast to the configuration provided with a pair of reinforcing plate members 47 on the back surface of 46, the break open portion 46 of the third embodiment is configured such that the pair of reinforcing plate materials 47 is omitted, and the other configurations are as described above. Since it is almost the same as that of the first embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

Also in the third embodiment, the interior panel 40 is made of PP resin, and the reinforcing frame 45 is formed by using a thermoplastic polyolefin soft resin (TPO) material having the same flexibility, and a fracture opening portion. The lower part of the frame main body 45a having the edge reinforcing portion 45b for the opening peripheral edge 46 is formed in a rectangular cylindrical shape by front and rear side walls 45c, 45c and left and right side walls (not shown). A lower opening in which the upper opening 45d has an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 44a of the airbag case 44 by inclining at least the front and rear wall inner surfaces of the main body 45a with respect to the back surface of the interior panel 40, respectively. An opening shape having an upper spread width W2 larger than 45e is employed.
That is, as is clear from FIG. 5, the lower end opening 45e on the airbag case 44 side of the frame body 45a has an inner peripheral dimension into which the opening 44a of the airbag case 44 can be inserted, and the interior panel 40 side of the frame body 45a. The inner peripheral dimension of the upper end opening 45d is formed larger than the inner peripheral dimension of the lower end opening 45e, and the cross-sectional area in the direction orthogonal to the length direction of the frame body 45a is enlarged from the lower opening 45e to the upper opening 45d. It is formed as follows.

  Also in the third embodiment having the above-described configuration, the upper opening 45d of the reinforcing frame 45 is formed larger than the lower opening 45f as in the first embodiment, so that the airbag 43 can be smoothly inflated and deployed. In addition, it is possible to prevent the occurrence of a sharp edge, a crushing phenomenon, and the like that can be formed in the fractured portion of the fractured opening portion 46, and provide a beautiful fracture surface.

FIG. 6 is a longitudinal sectional view of an essential part of a reinforcing frame 45 showing a fourth embodiment of the automotive airbag apparatus of the present invention, and corresponds to FIG. 4 in the second embodiment described above.
In the fourth embodiment, the structure different from the second embodiment is that the second embodiment is such that the opening of the break opening portion 46 is of a single-open type, and a pair of reinforcements are provided on the back surface of the break opening portion 46. In contrast to the configuration provided with the plate material 47, the break open portion 46 of the fourth embodiment is a configuration in which the reinforcing plate material 47 is omitted, and the other configurations are substantially the same as in the first embodiment. The same parts are denoted by the same reference numerals, and the description thereof is omitted.

  Also in the fourth embodiment, the interior panel 40 is made of PP resin, and the reinforcing frame 45 is formed using a thermoplastic polyolefin soft resin (TPO) material having the same flexibility, and the fracture opening 46 is formed. The reinforcing frame body 45 is composed of a rectangular cylindrical frame main body 45a having an edge reinforcing portion 45b for the peripheral edge of the opening.

The lower part of the frame main body 45a is formed in a rectangular cylindrical shape by front and rear side walls 45c, 45c and left and right side walls (not shown), and the inner surfaces of the front and rear side walls of the frame main body 45a are formed on the back surface of the interior panel 40. On the other hand, the upper opening 45d is made to have an opening shape having an upper expanding width W2 larger than the lower opening 45e by making the upper opening 45d have an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 44a of the airbag case 44 by being inclined.
That is, as is clear from FIG. 4, the lower end opening 45e on the airbag case 44 side of the frame body 45a has an inner peripheral dimension into which the opening 44a of the airbag case 44 can be inserted, and the interior panel 40 side of the frame body 45a. The inner peripheral dimension of the upper end opening 45d is formed larger than the inner peripheral dimension of the lower end opening 45e, and the cross-sectional area in the direction orthogonal to the length direction of the frame main body 45a is enlarged from the lower opening 45e to the upper opening 45d. It is formed as follows.

  Further, the break open portion 46 is formed in a flat rectangular shape, has a hinge groove 40a on the front side by laser processing from the back side of the interior panel 40, and break open grooves 40c, 40c, 40b is formed, and when the airbag is inflated, it is opened in a single-opening manner through the hinge groove 40a and the hinge portion 47c of the reinforcing plate 47.

  A plurality of square holes 47f are formed in the front and rear side walls 45c and 45c of the bent portion 47b bent downward in an upwardly enlarged angle along the inner surface of the front side wall 45c of the rectangular cylindrical frame body 45a, The hook portions 44b and 44b of the airbag case 44 are locked.

  Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  Also in the fourth embodiment having the above-described configuration, the upper opening 45c of the reinforcing frame 45 is formed larger than the lower opening 45e as in the second embodiment, so that the airbag 43 can be smoothly inflated and deployed. In addition, it is possible to prevent the occurrence of a sharp edge, a crushing phenomenon, and the like that can be formed in the fractured portion of the fractured opening portion 46, and provide a beautiful fracture surface.

  In addition, the opening shape with the upper widening width W2 formed in the rectangular cylinder shape in the embodiment is configured to incline the front, rear and left and right side walls of the frame body 45a with respect to the back surface of the interior panel 40, respectively. Thus, although the upper opening 45d has an opening shape having an upper expanding width W2, it is needless to say that the left and right side walls are vertical and only the front and rear side walls are inclined to have an opening shape having an upper opening.

  In the above-described embodiment, the interior panel is made of PP resin and the reinforcing frame 45 is made of thermoplastic polyolefin soft resin (TPO) having the same flexibility, but the interior panel is made of the reinforcing frame. It is of course possible to mold the same material.

According to the passenger-side airbag device 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 detected by a well-known sensor (not shown). Then, whether or not the impact force detected by this 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 determined to be equal to or greater than a set value. the signals, by operating a known inflator which is not shown to generate a predetermined gas, by supplying the gas to the air bag 43, in a Turkey is rapidly inflated and deployed the air bag 43, a vehicle collision occupants Can protect against the shock of time.

Partial expansion explanatory drawing which shows the state which formed the fracture | rupture opening | release part for airbag expansion | deployment expansion | deployment in the single plate-shaped interior panel of the conventional airbag apparatus for passenger seats. The schematic sectional drawing which follows the AA line of FIG. The longitudinal cross-sectional view of the principal part of 1st Example at the time of applying the airbag apparatus for motor vehicles concerning this invention for front passenger seats. The longitudinal cross-sectional view of the principal part of 2nd Example at the time of applying the airbag apparatus for motor vehicles concerning this invention for front passenger seats. The longitudinal cross-sectional view of the principal part of 3rd Example at the time of applying the airbag apparatus for motor vehicles concerning this invention for front passenger seats. The longitudinal cross-sectional view of the principal part of 4th Example at the time of applying the airbag apparatus for motor vehicles concerning this invention to a passenger seat.

40 Interior Panel 40a Hinge Groove 40b Central Break Groove 40c Side Break Groove 41 Automobile Airbag Device 42 Housing Part 43 Airbag 44 Airbag Case 45 Reinforcement Frame 45a Frame Main Body 45b Reinforcement Edge 45c Front and Rear Side Walls 45d Upper Opening 45e Lower opening 45f Square hole opening 47 Reinforcement plate material 47a Horizontal part 47b Bent part

Claims (6)

It is disposed on the back side of the interior panel provided in a room of a motor vehicle, having an opening on the back surface opposite to the upper end of the housing and the interior panel in a folded state is inflated and deployed Rue earth bag by the gas from the inflator an air bag case, and the fracture-opening section plan view shape which determines the opening shape for the formed on the back surface of the interior panel air bag deployment which faces said opening of the air bag case exhibits a rectangular, the fracture-opening section of with the reinforcing frame body consisting of the interior panel back surface disposed thermoplastic polyolefin soft resin (TPO) in a position corresponding to the peripheral region, the fracture-opening section, of the rectangular front, after A pair of front and rear hinge grooves provided on the long side, a side breaking groove provided on the left and right short sides of the rectangle, and the left and right short sides of the rectangle, respectively. A central breaking groove provided on the line, and the break opening portion is divided into front and rear breaking opening portions along the side breaking groove and the central breaking groove by expansion of the airbag. In the automotive airbag device that is opened by the double door system with the front and rear hinge grooves as fulcrums ,
The reinforcing frame has a length that reaches the opening of the airbag case from the back surface of the interior panel, and has a rectangular main body that corresponds to a plan view shape of the breaking open part, and the frame main body A reinforcing edge that reinforces the peripheral area of the break open part from the back surface of the interior panel, extending from the upper end to the outside of the frame body at the upper end of the interior panel.
The lower end opening of the frame body on the side of the airbag case has an inner peripheral dimension into which the opening of the airbag case can be inserted, and the inner peripheral dimension of the upper end opening on the interior panel side of the frame body is the inner periphery of the lower end opening. Formed so that the cross-sectional area in a direction perpendicular to the length direction of the frame body is enlarged from the lower opening toward the upper opening,
An automobile airbag apparatus, wherein an upper end of the airbag case on the opening side is coupled to a lower opening of the frame body . A pair of reinforcing plate members that reinforce the front and rear break open portions from the back surfaces of the respective break open portions , wherein each of the reinforcing plate members is bonded to the back surface of each break open portion; Near the hinge groove and connected to the horizontal part via a hinge part and bent at an angle along the front and rear wall inner surfaces of the frame body, respectively, and the front and rear of the frame body. The automobile airbag device according to claim 1, wherein hook portions of the airbag case are locked into a plurality of square holes formed corresponding to the wall and the bent portions, respectively. On the surface corresponding to the back surface side of the interior panel of the reinforcing frame body and the horizontal portion of the reinforcing plate material are formed streak projections projecting at predetermined intervals, and through these projections. The automobile airbag device according to claim 2, wherein the reinforcing edge portion and the horizontal portion are fixed to the back surface of the interior panel by vibration welding. It is disposed on the back side of the interior panel provided in a room of a motor vehicle, having an opening on the back surface opposite to the upper end of the housing and the interior panel in a folded state is inflated and deployed Rue earth bag by the gas from the inflator an air bag case, and the fracture-opening section plan view shape which determines the opening shape for the formed on the back surface of the interior panel air bag deployment which faces said opening of the air bag case exhibits a rectangular, the fracture-opening section of with the reinforcing frame body consisting of the interior panel back surface disposed thermoplastic polyolefin soft resin (TPO) in a position corresponding to the peripheral region, the fracture-opening section, the rectangular front long side on One hinge groove provided on the side, a side breaking groove provided on each of the left and right short sides of the rectangle, and a rear side breaking provided on the rear long side of the rectangle Is composed of a, the automobile in which the fracture-opening section by the expansion of the air bag is opened by the single swing type is pre-broken to fulcrum the hinge groove along the side fracture grooves and the rear side fracture grooves In the airbag device,
The reinforcing frame body has a length that reaches the upper end of the airbag case from the back surface of the interior panel, and has a rectangular main body that corresponds to a plan view shape of the fracture opening portion, and the frame A reinforcing edge that reinforces the peripheral area of the break open part from the back surface of the interior panel, extending from the upper end to the outside of the frame body at the interior panel side upper end of the body;
The lower end opening of the frame body on the side of the airbag case has an inner peripheral dimension into which the opening of the airbag case can be inserted, and the inner peripheral dimension of the upper end opening on the interior panel side of the frame body is the inner periphery of the lower end opening. Formed so that the cross-sectional area in a direction perpendicular to the length direction of the frame body is enlarged from the lower opening toward the upper opening,
An automobile airbag apparatus, wherein an upper end of the airbag case on the opening side is coupled to a lower opening of the frame body . A reinforcing plate for reinforcing the break open portion from the back surface of the break open portion; the reinforcing plate material being a horizontal portion bonded to the back surface of the break open portion; and a hinge to the horizontal portion in the vicinity of the hinge groove of the break open portion A plurality of bent portions that are connected to each other and bent downward at an angle along the inner surface of the front side wall of the frame body, and are formed corresponding to the front side wall and the bent portion of the frame body, respectively. The automobile airbag device according to claim 4, wherein a hook portion of the airbag case is locked in a square hole. On the surface corresponding to the back surface side of the interior panel of the reinforcing frame body and the horizontal portion of the reinforcing plate material are formed streak projections projecting at predetermined intervals, and through these projections. 6. The automobile airbag device according to claim 5, wherein the reinforcing edge portion and the horizontal portion are fixed to the back surface of the interior panel by vibration welding.