JP2005271652A - Air bag device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for an automobile capable of securing safety of an occupant by protecting the occupant in a cabin such as a front passenger seat or a driver's seat from impact of a head-on collision or a side collision at the time of a collision of a vehicle such as the automobile. <P>SOLUTION: In this air bag device for the automobile, a breaking opening part 46 of an interior panel 40 provided in the cabin of the automobile has a double hinged door system, and a reinforcing frame body 45 disposed on a rear surface at a position corresponding to an opening peripheral region of at least the breaking opening part 46 is provided. The reinforcing frame body 45 is formed by a rectangular cylindrical frame body 45a having a reinforcing edge part 45b corresponding to an outer peripheral end of an upper part opening by a thermoplastic polyolefinic soft resin (TPO) material. A breaking groove 40b for divided cleavage is formed between left and right breaking grooves 40c for the cleavage. An opening hole 20 of the breaking groove 40b machined from a rear surface side of the interior panel 40 is formed by inclining an opening angle so that an opening end 20b may be located on a rear part side remote from front glass 30 side in relation to a vertical line C orthogonal to the rear surface of the interior panel 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 for breaking the break opening portion.

  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 breaking part for deep cleavage and the hinge part with 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).

A conventional automobile airbag apparatus is a seamless type airbag for a passenger seat in which the breaking grooves 10b and 10c and the front and rear hinge grooves 10a of the breaking opening portion 14 as shown in FIGS. A device is provided.
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. By irradiating while relatively moving along the outer edges of the curved reinforcing plate members 11, 11, the longitudinal front and rear hinge grooves 10a, 10a formed in a direction perpendicular to the back surface of the interior panel 10 are formed. In addition, an air bag corresponding to the size of the opening 13a of the air bag case 13 that accommodates the air bag 12 is provided by providing the cleaving groove 10b for central cleaving and the cleaving grooves 10c, 10c for cleaving left and right in the short direction. A breaking opening 14 for inflating and expanding is formed.
Further, the break opening part 14 becomes front and rear break opening parts 15a and 15b by a center breaking groove 10b formed in the longitudinal direction and a breaking groove 10c, 10c for lateral cleavage in the short direction. At the time of inflating and expanding, the front and rear hinge grooves 10a and 10a are respectively opened in a double-spread state.

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 so that the vertical portions 11b, 11b have 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 locked, 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 provided. 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 deployment pressure when the airbag is inflated and deployed. ing.

  In the automobile air bag apparatus 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 the 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, when the break open portion 14 of the interior panel 10 is pressed from the inside by the pressure, the break grooves 10b and 10c of the break open portion 14 are broken, and the front and rear hinge grooves It is developed in a double-speech state via 10a. Then, the front and rear break open portions 15a and 15b developed in the double-opening state are deployed via the hinge portions 11c and 11c of the reinforcing plate members 11 and 11, respectively.
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 automobile airbag device as described above, the double door opening method in which the breaking open portion 14 of the interior panel 10 is divided and broken into the front and rear break opening portions by the breaking groove formed in the central portion in the longitudinal direction. In this case, it is not expected that the inflation pressure of the airbag when the airbag is inflated and deployed is urged against the back side of the front and rear break open portions, and the vehicle body in particular In the case of an interior panel constructed by inclining the occupant side lower than the front glass side, the occupant side is guided by the rectangular frame of the reinforcing frame body with the direction of popping out due to the inflation of the air bag so as to jump out. There is a problem in that a certain rear break opening portion opens after the front break opening portion on the front glass side.

  Accordingly, a breaking groove for breaking formed in the longitudinal center portion of the breaking opening portion that is double-spreaded to eliminate the above-mentioned problem is formed at a position close to the occupant side, and the rear breaking opening portion is formed on the front breaking opening portion. Although it is conceivable to make both areas evenly open by forming a smaller area, as shown in FIGS. 3 (a) and 3 (b), the interior panel 10 is inclined low toward the occupant side. In the state where the air bag 12 is inflated, the front and rear break open portions 15a and 15b are operated by the pressing force of the air bag 12 for splitting the front and rear break open portions 15a and 15b. As a result of acting on the groove 10b, the front break opening portion 15a on the side of the front glass having a large area above the inclination is pointed along the locus of the arrow line B as shown in FIG. Expanded to Because, interfere with each other during fracture surface D of the divided rupturing breaking groove that is formed on the vertical line C which is perpendicular to the interior panel back surface as shown in FIG. 3 (b), E is deployed. That is, the split fracture surface D of the pre-break opening portion 15a to be expanded first is caught on the split fracture surface E of the post-break opening portion 15b that expands later and hinders expansion and expansion, so that a strong expansion pressure is applied. The fracture surfaces D and E of the opening portion before and after the rear breakage have a problem that the appearance is poor in appearance due to the occurrence of cracks or tears.

  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.

  Further, in the initial stage of inflation of the airbag, the airbag that is about to be inflated suddenly receives a stress (reaction force) at the opening portion of the breaking groove 10b for splitting, and the smooth inflation operation is hindered. However, there is a problem that the expansion speed is lowered and the safety of the occupant is hindered.

  The present invention has been made to solve the conventional problems as described above, and an object of the present invention is to form the reinforcing frame at the outer peripheral edge of the upper opening by a thermoplastic polyolefin soft resin (TPO) material. Formed by a rectangular cylindrical frame main body having a corresponding reinforcing edge, and the split cleavage fracture grooves are formed between the front and rear hinge grooves and between the left and right fracture grooves for cleavage, and An opening is formed by inclining the opening of the fracture groove to be processed from the back side of the interior panel toward the rear side where the end of the aperture is farther from the front glass side with respect to the vertical line C orthogonal to the back side of the interior panel Accordingly, it is an object of the present invention to smoothly perform the unfolding operation of the front and rear break opening portions without being hindered by the inflation pressure of the airbag when the airbag is inflated and deployed.

  In addition, vibration welding can be easily performed by using the resin material of the same system for the interior panel and the reinforcing frame body, and assembling is facilitated, as well as to the fracture opening portion of the interior panel and the vicinity of the outer periphery of the opening. An object of the present invention is to provide an automotive airbag device that improves pressure resistance against a pressing load from the outside.

  In order to achieve the above object, the invention according to claim 1 of the present invention folds the airbag disposed on the back side of the interior panel provided in the interior of the automobile and inflated and deployed by the gas from the inflator. An air bag case that is stored in an open state, and a rear hinge groove and a left and right breaking groove for tearing are formed on the back surface of the interior panel opposite to the opening of the air bag case before determining the opening shape for air bag deployment. By providing a break open part of the opening that has a flat rectangular shape, the front and rear breaks are opened by the split groove for splitting formed in the center between the front part and the rear part of the break open part. An automotive airbag device comprising a reinforcing frame disposed on the back surface at a position corresponding to an opening peripheral region of the opening portion of the breaking opening portion, wherein the door opening method is divided and broken into parts. The reinforcing frame is made of a thermoplastic polyolefin-based soft resin (TPO) material with a rectangular cylindrical frame body having a reinforcing edge corresponding to the outer periphery of the upper opening, and the split groove for splitting is formed. Formed between the left and right breaking grooves for cleavage, and the opening of the breaking groove to be processed from the back side of the interior panel, the end of the opening is broken with respect to a vertical line perpendicular to the back surface of the interior panel The opening portion is formed at an opening angle inclined toward the rear side of the opening portion.

  According to a second aspect of the present invention, in the automobile airbag device according to the first aspect, the split groove for breaking is split in parallel to the front and rear hinge grooves and toward the rear side, and the left for cutting, The opening of the breaking groove that is formed between the right breaking grooves and is processed from the back side of the interior panel is located at the rear side of the fracture opening portion with respect to a vertical line perpendicular to the back surface of the interior panel. It is characterized by being formed at an inclined opening angle.

  According to a third aspect of the present invention, in the automobile airbag device according to the first or second aspect, the opening inclination angle formed in the breaking groove for splitting is an opening with respect to a vertical line of the interior panel. The center line connecting the start end and the open end has an inclination of 5 to 15 degrees.

  Invention of Claim 4 is the airbag apparatus for motor vehicles as described in any one of Claims 1-3, The front-end | tip of each horizontal part is the fracture | rupture groove | channel vicinity for said cleavage on the back surface side of the said fracture | rupture opening | release part. A pair of reinforcing plate members disposed opposite to each other, each reinforcing plate member in the vicinity of the hinge groove of the opening portion for breaking, an angle along the front and rear wall inner surfaces of the rectangular cylindrical frame body via the hinge portion And the hook portion of the airbag case is locked to a plurality of square holes formed respectively corresponding to the front and rear walls of the frame body and the respective bent portions. It was made to do.

  According to a fifth aspect of the present invention, in the automobile airbag device according to any one of the first to fourth aspects, the reinforcing edge portion of the reinforcing frame body and the horizontal direction of the reinforcing plate material corresponding to the back side of the interior panel. The upper surface of each part is formed with protruding portions of streaks protruding at predetermined intervals, and fixed to each other by vibration welding to the back surface of the interior panel via these protruding portions.

  According to the automotive airbag device of the present invention configured as described above, the reinforcing frame body is made of a thermoplastic polyolefin-based soft resin (TPO) material and has a rectangular shape having a reinforcing edge corresponding to the outer peripheral edge of the upper opening. Formed by a tubular frame body, the split groove for breaking is formed between the left and right break grooves for splitting, and the opening of the break groove to be processed from the back side of the interior panel is By forming the opening angle so that the opening end is farther from the front glass side with respect to the vertical line orthogonal to the back surface of the interior panel, the front pressure is increased by the inflation pressure of the airbag when the airbag is inflated and deployed. , The unfolding operation of the rear break opening portion can be performed smoothly without being hindered, and there is an effect that damage such as tears and cracks occurring at the opening edge of the break opening portion can be prevented.

  Further, the breaking groove for split cleavage is formed in parallel with the front and rear hinge grooves and on the rear side and formed between the left and right breaking grooves for cleavage, and is processed from the back side of the interior panel. An opening surface of the interior panel is formed by forming the opening of the breaking groove at an opening angle in which an opening end is inclined toward the rear side of the fracture opening portion with respect to a vertical line orthogonal to the back surface of the interior panel. Is mounted on the passenger seat side at a low slope, the front and rear break-opening ends may be connected to each other even when the large front break-opening portion on the front glass side is opened first. Have the effect of opening smoothly without buffering each other.

  Furthermore, vibration welding can be easily performed by using the resin material of the same system for the interior panel and the reinforcing frame body, facilitating the assembly, and also to the fracture opening portion of the interior panel and the vicinity of the outer periphery of the opening. The pressure resistance against the pressing load from the outside can be improved.

  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. An embodiment in which a break opening portion is applied to an automobile airbag device in which a break opening portion is deployed and opened in a double-spreading manner by expansion, and a break opening portion is provided on a passenger seat side of an interior panel, will be described with reference to the drawings.

FIG. 4 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. 4, 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. 4, an accommodating portion 42 for accommodating an automobile airbag device 41 is formed at an inner portion of the interior panel 40 facing the passenger seat (corresponding to a right-hand drive vehicle) on the left side portion. In the case of a left-hand drive vehicle, it is provided on the right side opposite to the above configuration. Reference numeral 30 denotes a front glass of an automobile.

The automobile airbag device 41 includes an airbag 43 that is inflated and deployed by gas from an inflator, an airbag case 44 having an opening 44a in the folded state of the airbag 43, and the interior panel 40. Reinforcement comprising 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 soft resin (TPO) material having the same flexibility as The frame body 45 has bent portions 47b and 47b slidably disposed inside the frame main body 45a, and ends near each other in the vicinity of the breaking groove 40b for cleavage formed in the longitudinal direction, which will be described later. It consists of a pair of reinforcement board material 47 provided with the horizontal parts 47a and 47a arrange | positioned facing the part.
The horizontal portions 47a and 47a of the pair of reinforcing plate members 47 are formed in an asymmetric shape having a large area on the front side and a small area on the rear side.

  The lower portion of the frame main body 45a is formed in a rectangular cylindrical shape by front and rear side walls 45c and 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 the interior panels. 40 is attached in a vertical state with respect to the back surface. The upper and lower openings 45d and 45e have an opening shape with an inner peripheral dimension slightly larger than the outer peripheral dimension of the opening 44a of the airbag case 44.

The break open portion 46 has a flat rectangular shape, and is formed with a break groove 40b for cleavage at a position slightly shifted to the rear side from the center portion in the longitudinal direction, so that the front and rear break open portions are formed. The front and rear break opening portions 46a and 46b are opened in a double door system.
The front and rear break open portions 46a and 46b are provided with a pair of reinforcing plate members 47 with the front ends of the horizontal portions 47a and 47a facing each other, and each reinforcing plate member 47 has the front and rear breaks, respectively. In the vicinity of the hinge grooves 40a and 40a of the opening portions 46a and 46b, the hinge portions 47c and 47c are respectively bent downward at angles along the front and rear side walls 45c and 45c of the rectangular cylindrical frame main body 45a. The airbag is provided in a plurality of square holes 45f and 47f respectively corresponding to the front and rear side walls 45c and 45c of the frame body 45a and the bent portions 47b and 47b. The hook portions 44b and 44b of the case 44 are locked.

  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. And are fixed to each other by vibration welding on the back surface of the interior panel 40 through these protrusions 50 and 51.

  The break open portion 46 includes an opening 44a of the air bag case 44 by a hinge groove 40a provided along the left and right longitudinal direction of the back surface of the interior panel 40 and break grooves 40c and 40c for side portion cleavage provided along the front and rear short direction. As shown in FIG. 5, it is formed by forming a rectangular shape in a slightly expanded position by laser processing or the like. As shown in FIG. At the position slightly shifted to the rear side which is the passenger side from the middle of 40c, 40c, a breaking groove 40b for splitting is formed by laser processing or the like extending over the entire length in the longitudinal direction of the breaking opening 46. Yes.

Further, the continuous opening 20 of the breaking groove 40b for splitting cleavage formed by laser processing or the like is open to a vertical line C perpendicular to the back surface of the interior panel 40 as shown in FIGS. The center line F connecting the starting end 20a and the opening end 20b is subjected to opening processing at an inclination angle such that the center line F has an inclination of 5 to 20 degrees, preferably 15 degrees.
Accordingly, the opening 20 of the breaking groove 40b processed from the back side of the interior panel 40 is a rear side where the opening end 20b is farther from the front glass 30 side than the vertical line C from the back side of the interior panel 40. The opening 20 is slanted.

  In the first embodiment of the present invention, the breaking groove 40b for split breaking at the breaking opening 46 is formed on the rear side, which is the occupant side, so that the airbag can be The expansion pressure acts equally on the breaking groove 40b for splitting for splitting from the back side of the front and rear break opening portions 46a, 46b. In particular, even in the case of the interior panel 40 configuration in which the occupant side is inclined lower than the front glass side of the vehicle body, the inconvenience that the occupant side rear break open portion 46b is broken open after the front break open portion 46a is solved. it can.

  In addition, when the airbag 43 is inflated and deployed, the split fracture surface D of the front break open portion 46a to be deployed first is caught by the split fracture surface E of the rear fracture open portion 46b that is deployed later, and the airbag 43 is inflated and deployed. The problem of hindering the appearance of the front and rear break opening portions 46a and 46b on the fracture surfaces D and E and causing the appearance to be bad is solved.

  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 and to prevent the occurrence of the sasker phenomenon at the fractured portion, thereby providing a beautiful fractured 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 the reinforcing frame body 45 and the reinforcing plate member 47 are also made. Since it becomes possible to perform vibration welding through the protruding portions 51 and 50 of the streaks formed on the horizontal portions 47a and the reinforcing edge portions 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. 6 is a longitudinal sectional view of an essential part of a reinforcing frame body showing a second embodiment of the automotive airbag device of the present invention, and corresponds to FIG. 4 in the first embodiment described above.
In this second embodiment, the structure 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 front and rear breaking opening parts, and the breaking opening part In contrast to the configuration provided with a pair of reinforcing plate members 47 on the back surface of 46, the break opening portion 46 of the second 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 this second 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, The lower part of the frame main body 45a having the edge reinforcing portion 45b for the opening peripheral edge of the fracture opening 46 is formed in a rectangular cylindrical shape by front and rear side walls 45c and 45c and left and right side walls (not shown). The opening part 46 of the air bag case 44 is opened by a hinge groove 40a provided along the back and left and right longitudinal direction of the interior panel 40 and side cleaving grooves 40c and 40c provided along the front and rear short direction. 44a is formed by laser processing or the like in a rectangular shape at a position slightly wider than 44a. A breaking groove 40b for breaking extending over the entire length in the longitudinal direction of the breaking open portion 46 is formed by laser processing or the like at a position slightly shifted to the rear side which is the passenger side slightly from the middle of the grooves 40c, 40c. Yes.

  Further, the continuous opening 20 of the breaking groove 40b formed by laser processing or the like connects the opening start end 20a and the opening end 20b with respect to a vertical line C orthogonal to the back surface of the interior panel 40. A hole is drilled at an inclination angle such that the center line F has an inclination of 5 to 20 degrees, preferably 15 degrees.

  Also in the second embodiment having the above-described configuration, the continuous opening 20 of the breaking groove 40b for cleavage is the opening start end 20a with respect to the vertical line C from the back surface of the interior panel 40, as in the first embodiment. Since the center line F connecting the opening end 20b is subjected to opening processing at an inclination angle of 5 to 20 degrees, preferably 15 degrees, the airbag 43 is smoothly inflated and deployed. It is possible to provide a beautiful fracture surface by preventing the occurrence of a sharp edge, a sacra phenomenon, and the like that can be formed on the fracture surface of the fractured opening part 46, especially the front and rear fracture opening parts 46a and 46b. it can.

  Further, 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. Of course, it is also possible to mold with the same material as the body.

  Furthermore, although the opening shape of the fracture opening portion in the above-described embodiment has been described as a planar rectangular shape, the opening shape is not limited to this, but is a rectangular shape such as a planar square shape, a planar parallelogram shape, or a circle. Of course, it is also possible to use a shape or an elliptical shape.

  Furthermore, in the above-described embodiment, the opening shape of the breaking opening portion is a flat rectangular shape, and the breaking groove for splitting is parallel between the front hinge groove and the rear hinge groove and on the rear side. The gaps are formed between the left and right breaking grooves for tearing and opened from the back side of the interior panel. The opening of the breaking groove is opened with respect to a vertical line perpendicular to the interior panel back side. Although the description has been given of the end formed with an opening angle inclined toward the rear side of the breaking opening portion, the breaking groove for the split cleavage is not limited to this, and the breaking groove for the front hinge groove and the rear hinge groove is used. Of course, it may be formed between the left and right breaking grooves for cleavage in parallel with the intermediate position.

  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. In response to the signal, a known inflator (not shown) is operated to generate a predetermined gas, and this gas is supplied to the air bag 43 to rapidly inflate and deploy the air bag 43 (see FIG. 7). Can be protected from the impact of a vehicle collision.

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 principal part expanded sectional view of the fracture | rupture groove | channel for division | segmentation cleavage formed in order to divide | segment the conventional fracture | rupture release part into the front and back fracture | rupture release parts. 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 top view of the principal part of the fracture | rupture opening | release part at the time of applying the airbag apparatus for motor vehicles concerning this invention for front passenger seats. The principal part expanded sectional view of the fracture | rupture groove | channel for division | segmentation cleavage formed in order to divide | segment the fracture | rupture release part of this invention into the front and back fracture | rupture release part. 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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Opening 20a Opening start end 20b Opening end 30 Front glass 40 Interior panel 40a Hinge groove 40b Breaking groove for tearing 40c Breaking groove for side parting 41 Automotive airbag apparatus 42 Housing part 43 Airbag 44 Airbag case 45 Reinforcement frame body 45a Frame body 45b Reinforcement edge portion 45c Front and rear side walls 45d Upper opening 45e Lower opening 45f Square hole opening 47 Reinforcement plate material 47a Horizontal portion 47b Bent portion

Claims (5)

An air bag case that is disposed on the back side of an interior panel provided in the interior of an automobile and stores the air bag inflated and deployed by gas from an inflator in a folded state, and opposite to the opening of the air bag case Before opening the airbag deployment opening shape, the rear hinge groove and the left and right breaking grooves for tearing are formed on the back surface of the interior panel to provide a break opening portion of the opening having a flat rectangular shape, and the breaking A double-spreading method in which the front and rear break open portions are split and broken by a split breaking break groove formed in the center between the front and rear portions of the open portion in the left-right direction, and at least the opening of the break open portion In an automotive airbag device provided with a reinforcing frame disposed on the back surface at a position corresponding to the peripheral region,
The reinforcing frame is formed of a thermoplastic cylindrical polyolefin resin (TPO) material with a rectangular cylindrical frame main body having a reinforcing edge corresponding to the outer peripheral edge of the upper opening, and the breaking groove for split splitting is formed by the cleavage. And forming the opening of the breaking groove to be processed from the back side of the interior panel between the left and right breaking grooves for use with respect to a vertical line perpendicular to the back surface of the interior panel, the opening end of the breaking panel An air bag device for automobiles, which is formed at an opening angle inclined toward the rear side. The split cleavage fracture grooves are formed in parallel between the front hinge groove and the rear hinge groove and shifted to the rear side so as to be formed between the left and right fracture grooves for cleavage, and the back surface of the interior panel. The opening of the breaking groove to be processed from the side is formed at an opening angle with an opening end inclined toward the rear side of the breaking opening portion with respect to a vertical line perpendicular to the back surface of the interior panel. Item 2. An automobile air bag device according to Item 1. The inclination angle of the opening to be processed and formed in the breaking groove for splitting is such that the center line connecting the opening start end and the opening end is 5 to 15 degrees with respect to the vertical line orthogonal to the back surface of the interior panel. The automobile air bag device according to claim 1, wherein the air bag device has an air bag. Provided on the back side of the break opening portion is a pair of reinforcing plate members whose front ends of the horizontal portions are arranged opposite to each other in the vicinity of the breaking groove for breaking, and each reinforcing plate member is located in the vicinity of the hinge groove of the breaking opening portion. Each of the front and rear walls of the frame body and each of the bent portions of the frame body. The automobile airbag according to any one of claims 1 to 3, wherein hook portions of the airbag case are locked in a plurality of square holes formed corresponding to the portions. apparatus. On the upper surface of the reinforcing frame body corresponding to the back side of the interior panel and the upper surface of the horizontal portion of the reinforcing plate member, the protruding portions of the streaks projecting at predetermined intervals are formed, and these protruding portions are The automobile airbag device according to any one of claims 1 to 4, wherein the airbag device is fixed to the back surface of the interior panel by vibration welding.