JP2001114056A - Air bag device for front passenger seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag device for a front passenger seat, in which reinforcing plate materials which are to be respectively expanded through hinge parts, are fixed to the undersurfaces of a dividable rupture-open part provided in an instrument panel cover, which is easy to be manufactured and which has a high external design property and safety. SOLUTION: In an air bag device 1 for front passenger seats, a dividable rupture-open part 30 is provided in an instrument panel cover 11 so that it faces an opening part 23 of a case 20, and brittle parts are formed in contour parts 30a and a divided part 30b of the rupture-open part 30 by laser beam maching etc. Before the rupture-open part is divided at the divided part 30b, reinforcing plate materials 33, 33 one end of each of which is connected to the instrument panel cover 11 or the end face of the opening of the case 20 through hinge parts 34, are fixed to the undersurfaces of post-rupture-open parts 31, 32, and at the time when the air bag is inflated-expanded, the rupture- open part is separated from the divided part to be expanded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag device for a passenger seat for protecting a passenger in a passenger seat from a collision in the event of a collision of a vehicle such as an automobile, thereby ensuring safety. When the passenger-side airbag device installed inside is inflated and deployed outside the instrument panel to protect the occupant from collision, a break opening for inflation and deployment formed on the cover of the instrument panel opposing this. It relates to the improvement of the structure of the part.

[0002]

2. Description of the Related Art An airbag device for a passenger seat applied to a vehicle such as an automobile basically has an inflator for inflating and deploying a case for accommodating the airbag device in a folded state. It is designed to be mounted inside the passenger seat. As shown in Japanese Patent Application Laid-Open No. 7-172256, a closing plate corresponding to the size of the opening of the case is provided on the instrument panel cover.
As shown in No. 7979, a lid plate facing the opening of the bag case is formed integrally with the cover, and the main body of a metal lid reinforcing plate is fixed to the inside of the outer peripheral edge portion with reduced strength on the lid plate. Then, a portion extending from the hinge portion of the lid reinforcing plate extending upward from the main body is fixed to the bag case via a bracket so that the closing plate or the lid plate is opened when inflated and deployed. I have.

[0003] In the passenger airbag device constructed 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 is determined in advance. It is determined by a control device including a CPU or the like whether or not the value has exceeded the predetermined value. When it is determined that the value has exceeded the set value, the inflator is operated by a signal output from the control device to generate a predetermined gas, and this gas is supplied. By doing so, the airbag is rapidly inflated and deployed. That is,
When the open lid of the instrument panel cover is pressed from the inside by the pressure by the inflation and deployment of the airbag, the open lid is broken along the breaking line and separated from the instrument panel cover, and the separated The open lid is opened outward from the instrument panel cover with the hinge portion of the lid reinforcing plate as a fulcrum. At the same time,
The airbag is inflated and deployed from the open portion to the outside of the instrument panel cover, and the cushioning effect of the inflated and deployed supports the occupant's chest and head in the passenger seat, thereby allowing the occupant to respond to a vehicle collision. Protects against impact.

The instrument panel of a conventional automobile as described above is generally open to the front of the front passenger seat of the vehicle, that is, at an inclined plane position of the instrument panel cover facing the front passenger. The airbag is opened outward from the instrument panel cover with the hinge part of the lid reinforcing plate as a fulcrum, and at the same time, the airbag is inflated and deployed outward. It is possible that the edges of the open lid that have been deployed may collide with each other, which can be extremely dangerous.In the case where the occupant is a child, the risk is doubled because the condition occurs near the child's face. is there. In order to prevent such a danger, an airbag device for a passenger seat as shown in FIG. 1 has been developed and provided.

More specifically, the passenger airbag device 1 shown in FIG. 1 is disposed on a horizontal surface 3a of an instrument panel cover 3 near a front window 1a of a vehicle, and is inflated and deployed by gas from an inflator. The airbag 4 is accommodated in a folded state, and includes a case 5 having an opening 5 a at a position facing the back surface of the instrument panel cover 3, wherein the case 5 of the instrument panel cover 3 is provided. An opening lid 6 formed of a flexible synthetic resin is disposed in the opening 3b formed in the panel cover 3 so as to be opposed to the opening 5a of the airbag 4. Is divided into two parts by grooves 6a and 6b formed in the center and the periphery of the opening lid 6 and separated in the front-rear direction to be opened. It is obtained by the.

On the back side of the opening lid 6, a mounting leg 7 having a rectangular cross section and formed slightly larger than the opening 5a of the case 5 by integral molding, and an opening formed in the panel cover 3. 3b, a plurality of engaging pieces 8 are provided on the opening edge of the mounting leg portion 3b.
The front and rear wall surfaces 7a, 7b are formed with a plurality of square holes 7c penetrating therethrough. When the open lid 6 is attached to the opening 3b formed in the panel cover 3, the opening 5a of the case 5 is formed. Are engaged with a plurality of hook portions 9 fixed to the front and rear wall surfaces 5b, 5b. In addition, at the time of expansion and deployment of the above-mentioned 4, the front and rear wall surfaces 7a and 7b of the mounting leg portion 7 are separated and separated in the front-rear direction from the groove portions 6a and 6b formed at the peripheral edge and the center of the opening lid 6 and open. And the front and rear wall surfaces 5 of the opening 5a of the case 5
The hooks 9 fixed to the b and 5b are engaged with each other so that the opening lid 6 is prevented from scattering.

[0007]

However, in the airbag device for a passenger seat as shown in FIG. 1, the panel cover 3 is located at a position corresponding to the opening 5a of the case 5.
An opening 3b is formed in the opening 3b, and a separate opening lid 6 made of a flexible resin material different from the panel cover 3 engaged with the opening 3b is provided. In addition, since the open lid can be easily distorted by an external pressure, there is a problem that the appearance of the instrument panel cover 1 is impaired, the design effect is reduced, and the production and mounting operations are troublesome. In addition, a lid reinforcing member for reinforcing the open lid 6 is not attached to the back side of the separate open lid 6, and the open lid 6 is made of a flexible material when the above 4 is expanded and deployed. The front of the mounting leg 7 and the opening 5a of the case 5
The engagement with the hook portion 9 fixed to the rear wall surfaces 5b, 5b is likely to be disengaged, and there is a possibility that the open lid 6 scatters.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an instrument panel cover which faces the opening of the case of the instrument panel cover. A breakable open portion having a fragile portion formed by laser irradiation or the like is provided on the back surface of each of the split open portions, and reinforcing plate members each having a hinge portion are fixed to the back surface of each of the split open portions. For the passenger seat, which is easy to manufacture and attach so that the break open portion is separated from the split portion and opened when the inflated and deployed, and which can reliably break the break open portion, has a high design and appearance. It is intended to provide an airbag device.

[0009]

According to the first aspect of the present invention, there is provided an instrument panel core constituting a vehicle instrument panel and a surface of the instrument panel core. An instrument panel cover fixed so as to cover, attached to a passenger seat of the instrument panel core, and accommodated in a folded state to be inflated and deployed by gas from an inflator, and a back surface of the instrument panel cover. An airbag device for a passenger seat, comprising a case having an opening at an opposing location, wherein the instrument panel cover is provided with a breakable openable portion facing the opening of the case and capable of being divided. The contoured part and the divided part form a fragile part and are divided by the divided part. A reinforcing plate material having one end connected to the instrument panel core or the end face of the opening of the case via a hinge portion is fixed to the back surface of each of the break open portions, and the break open portion is inflated when the airbag is inflated and deployed. It is characterized in that it is developed apart from the dividing part.

According to a second aspect of the present invention, in the airbag device for a passenger seat according to the first aspect, the split portion of the break open portion is formed at a substantially central portion along the left-right direction of the vehicle. A fragile portion is formed so as to be divided into two parts.

According to a third aspect of the present invention, there is provided an airbag device for a passenger seat according to the first or second aspect, wherein
The split open portion is formed by offsetting the split portion so that the passenger seat side of the vehicle has a slightly smaller area than the windshield side.

According to a fourth aspect of the present invention, there is provided an airbag device for a passenger seat according to any one of the first to third aspects,
It is arranged that the opening of the case is arranged close to the breaking open portion and the divided portion, and is accommodated in the opening of the case, so that the fragile portion of the breaking open portion and the split portion is reinforced to withstand external pressure. Features.

According to a fifth aspect of the present invention, there is provided an airbag device for a passenger seat according to any one of the first to fourth aspects,
An uneven portion is formed at an opposite end of each of the reinforcing plate members fixed to the back surface of the split open portion to be divided, and the split portions are arranged corresponding to each other in a staggered manner.

According to a sixth aspect of the present invention, there is provided an airbag device for a passenger seat according to any one of the first to fifth aspects,
The fragile portions on the left and right sides of the break open portion are each composed of a convex curve ending at the split portion and a combination of the convex curve and the oblique line, and form an acute-angle projecting portion at the end of the split portion of the panel cover. In addition, the divided portion is formed so as to be shifted toward the passenger seat side of the vehicle.

According to a seventh aspect of the present invention, there is provided an airbag device for a passenger seat according to any one of the first to sixth aspects,
The split open portion is installed on a horizontal plane of an instrument panel cover near a front window on a front side of the vehicle.

According to an eighth aspect of the present invention, in the airbag device for a passenger seat according to the seventh aspect, the split opening portion on the passenger seat side of the vehicle is provided with the instrumental bag when the airbag is inflated and deployed. The size is such that it does not protrude toward the inclined surface side of the front of the passenger seat that is continuous from the horizontal surface of the men- tion panel cover.

According to a ninth aspect of the present invention, there is provided an airbag device for a passenger seat according to any one of the first to eighth aspects,
The fragile portion formed in the contour portion and the divided portion of the break open portion, while relatively moving the laser generated from the laser generating means from the back side of the instrument panel cover along the contour portion and the split portion of the break open portion. It is characterized by being formed by irradiation.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a perspective view of a main part of an instrument panel cover provided with a passenger airbag device showing a first embodiment of a passenger airbag device according to the present invention, and FIG. 4 is a first embodiment of the present invention. FIG. 5 is a longitudinal sectional side view of the passenger airbag device in FIG. 5, FIG. 5 is a plan view of a main part of an instrument panel cover having a break open portion of the passenger airbag device in the first embodiment of the present invention, FIG. FIG. 7 is a longitudinal sectional view of a main part showing a reinforcing plate member in a state in which a passenger airbag device according to a first embodiment of the present invention is operated. FIG. 7 is an instrument showing a modified example of a break opening portion of the passenger airbag device. FIG. 8 is a plan view of a main part of an instrument panel cover showing still another modified example of the break open portion of the airbag device for a passenger seat.

3 and 4, the instrument panel 10 includes an instrument panel core 12 and an instrument panel core 12.
An instrument panel cover 11 that covers the surface of the instrument panel core 12 is provided, and is formed of a resin molded product integrally formed of a synthetic resin material such as polypropylene. The instrument panel cover 11 is fixed to an instrument panel core 12 fixed to a skeleton (not shown) of the vehicle by an appropriate means such as a tapping screw.

At a position on the left side of the instrument panel cover 11 facing the passenger seat (for Japanese cars),
As shown in FIG. 4, an accommodating portion 21 for accommodating a metal case 20 is formed by a partition member 22. In addition,
In the case of a foreign vehicle, it is provided at a position symmetrical to the above configuration.
The partition member 22 is configured to be detachably fixed to the instrument panel cover 11 with a plurality of tapping screws in order to easily attach the case 20 or the like to the instrument panel cover 11. Also,
A break opening portion 30 that is opened when the instrument panel cover 11 is inflated and deployed is formed at a location of the instrument panel cover 11 that faces the housing portion 21. The break open portion 30 has a rectangular shape with substantially the same area as the opening 23 of the case 20 and is formed so as to be able to be divided into two from a divided portion 30b having a fragile portion formed by laser processing described later.

As shown in FIG. 4, the case 20 is mounted in the accommodating portion 21 by protruding one end of the case 20 from the back of the instrument panel cover 11 at the opening 23 side. The boss 11a is fixed to the continuous horizontal bent portion 33a by a bolt / nut 25 via a hinge 34 of a reinforcing plate 33 fixed by a screw 24 to the boss 11a. Further, the lower end of the case 20 is fixed to the partition member 22 with bolts and nuts 26.
A case 27 is stored in a folded state in the case 20, and is connected to an inflator (gas generator) (not shown) provided outside the partition member 22 through a gas blowing pipe 28. Have been. The opening 23 of the case 20 is closed by a protective cover 29 made of a thin cloth made of chemical fiber. This protective cover 29
Is for preventing inadvertent protrusion from the case 20 when the 27 is not used, and easily breaks when the 27 is inflated and deployed by gas supply from the inflator.

The rupture opening 30 is formed to have a size opposite to the opening 23 of the case 20 of the instrument panel cover 11, and extends substantially in the left-right direction of the rupture opening 30. Before and after splitting from the split portion 30a formed in the portion, the break open portions 31, 32
It is composed of The front and rear break opening portions 31 and 32 are separated from the front break opening portion 3 on the front windshield side by the rear break opening portion 32 on the passenger seat side of the vehicle.
The split portion 30a is formed so as to be offset so as to be a break open portion having an area slightly smaller than 1.

The contour portion 30a and the split portion 30b of the break open portion 30 are provided with a pulsed laser beam generated from a laser generating means (not shown) from the back side of the instrument panel cover 11 to form the contour of the break open portion 30. The instrument panel cover 11 is formed by a fragile portion formed by irradiating while being relatively moved along the portion 30a and the divided portion 30b. Each hinge part 34
Reinforcing plate 3 connected to the instrument panel cover 11 and the end face of the opening 23 of the case 20 through
When the air bag 27 is inflated and deployed, the rupture opening portions 30 are separated from each other from the dividing portion 30b and open.

As shown in FIG. 6, the reinforcing plate members 33, 33 are formed in a substantially rectangular shape having a shape corresponding to the inner wall surfaces of the front and rear break opening portions 31, 32, respectively. A hinge portion 34 is formed at the upper end in the short direction of each of the reinforcing plate members 33, 33 so as to extend in the long direction. Further, in each of the reinforcing plate members 33, 33, a plurality of reinforcing concave portions 35 extending in the shorter direction are formed at intervals in the longitudinal direction of the reinforcing plate member 33. Further, each of the reinforcing plate members 33, 33 has a plurality of coupling holes 3 long in the short direction.
6 are formed vertically and horizontally adjacent to each other, and the plurality of coupling holes 36 are formed as one block, and the blocks are provided vertically and horizontally at predetermined intervals over the entire area of the reinforcing plate 33.

Further, concave and convex portions 33a are formed at opposing ends of the reinforcing plate members 33, 33, and are arranged in a staggered manner in the divided portions 30b. Furthermore, the upper end of the opening 23 of the case is disposed close to the back side of the break open portion 30, and the 27 housed in the case 20 abuts against the fragile portions of the contour portion 30a and the split portion 30b. By arranging in this state, the fragile portion formed in the instrument panel cover 11 is reinforced so as to withstand external pressure.

On the inner wall surfaces of the front and rear break opening portions 31 and 32, the same number of protrusions 37 as the arrangement of the connection holes 36 of the blocks are formed corresponding to the arrangement of the blocks. Each of the reinforcing plate members 3 is engaged by engaging the ridge 37 with the coupling hole 36 and heating and melting the protruding end thereof.
3, 33 can be integrally fixed to the inner wall surfaces of the front and rear breaking open portions 31, 32.

Next, a description will be given of a case in which a break opening portion 30 is formed in the instrument panel cover 11 facing the housing portion 21. When forming the contour portion 30a and the divided portion 30b of the rupture opening portion 30 that ruptures at the time of expansion and deployment of 27 on the instrument panel cover 11,
A predetermined frequency from a well-known laser generating means (not shown),
For example, a 7 kHz pulse laser (output = 3 to 5 kHz)
W) is generated intermittently at a fixed period, and this laser is irradiated from the back side of the instrument panel cover 11 while moving relatively at a predetermined speed along the outer edge of the reinforcing plate 33 fixed to the back side. I do. Thereby, a groove-shaped fragile portion is formed in the instrument panel cover 11 according to the relative movement speed and the laser generation pattern from the laser generation means.

By forming such a groove in the pattern along the entire periphery of the outer edge of the reinforcing plate 33 on the instrument panel cover 11, a fragile portion is formed.
The area of the contour 30a surrounded by the fragile part and the divided part 30b
Are broken at the time of expansion and deployment of 27. The split open portion 32 on the passenger seat side of the vehicle does not project toward the inclined surface 11c in the front of the passenger seat that is more continuous than the horizontal surface 11b of the instrument panel cover 11 when the airbag 27 is inflated and deployed. The size is preferably set.

According to the passenger-side airbag device according to the first embodiment of the present invention, when a vehicle such as an automobile collides, the impact force at the time of the collision is detected by the sensor. The control device comprising a CPU or the like determines whether or not the impact force detected by the sensor is equal to or greater than a predetermined value, and when the determined value is equal to or greater than the set value, the inflator is activated by a signal output from the control device. The airbag 27 is operated to generate a predetermined gas, and the gas is supplied to the airbag 27, whereby the airbag 27 is rapidly inflated and deployed.
Then, by inflating and deploying the airbag 27,
When the break open portion 30 of the instrument panel cover 11 is pressed from inside by the pressure, the front and rear break open portions 3
As shown in FIG. 6, the instrument panel covers 1 and 32 are broken along the contour portion 30a and the divided portion 30b.
1 and the separated front and rear break open portions 31 and 32 are connected to the hinge portions 34 of the reinforcing plate members 33 and 33, respectively.
Is opened to the outside of the instrument panel cover 11 with the fulcrum as a fulcrum.

At the same time, the air bag 27 is moved from the opened break opening 30 to the instrument panel cover 1.
1, the cushion and the head of the passenger in the passenger seat are supported by the cushioning action of the inflated and deployed airbag 27, thereby protecting the passenger from the impact force at the time of a vehicle collision, and ensuring its safety. Nature can be secured.

Therefore, according to the airbag device for the passenger seat configured as described above, the break opening portion 30 is formed on the back surface of the instrument panel cover 11 by the laser processing to form the fragile portion 30a and the split portion. 30b
The instrument panel cover 11 has a break open portion 3 on the surface of the horizontal surface 11b.
The design of the instrument panel cover can be improved without revealing the position of the airbag 2 and the airbag 2
7 can be reliably and quickly broken along the divisional portion 30b at the time of the expansion and deployment of 7.

In the above-described first embodiment, the break opening portion 3 formed on the back surface of the instrument panel cover 11
Although the case where the right and left contours 30a are formed in a straight line has been described, as shown in FIGS.
The contour portions 30a of the left and right fragile portions of the rear break open portions 31 and 32 are respectively formed by a convex curve L ending at an end 30c of the divided portion 30b and a combination of the convex curve L and the oblique line S. The projection 30 may have an acute-angled projection 11e formed at the end 30c of the division of the opening 11d of the panel cover 11, and the division 30b may be formed so as to be shifted toward the passenger seat side of the vehicle. By doing so, it is possible to reduce sharp edge shapes generated at the peripheral corners of the front and rear break opening portions 31 and 32. Further, in the above-described embodiment, the formation of the fragile portion is performed by irradiating the laser generated from the laser generating means while moving the laser relatively from the back side of the instrument panel cover along the contour portion and the divided portion of the break open portion. However, the present invention is not limited to this, and it is of course possible to form a fragile portion by forming a groove using a mold at the time of forming the instrument panel cover.

[0033]

As described above, according to the airbag device for a passenger seat of the present invention, the instrument panel cover is provided with a breakable opening portion which can be divided so as to face the opening portion of the case. The contour part and the division part of the open part are
Forming a fragile portion and fixing a reinforcing plate material having one end connected to the instrument panel cover or the opening end surface of the case via a hinge portion on the back surface of each break open portion divided by the split portion. When the airbag is inflated and deployed, the rupture opening portion is configured to be deployed apart from the division portion, so that the production is easy and the rupture opening portion is reliably broken along the contour portion and the division portion. In addition to this, there is an effect that a passenger-side airbag device that has resistance to external pressure and has high appearance design and high safety can be provided. Further, since the break open portions that are deployed to the occupant when the device is inflated and deployed are securely connected by the reinforcing plate, the break open portions do not scatter. Furthermore, since the opening of the break open portion is performed in a horizontal portion near the windshield of the instrument panel cover, the edge portion of the break open portion does not collide with the occupant, especially when the occupant is a child or the like. In addition, there is no danger that the breaking open portion will be deployed near the child's face, so that danger is prevented.

[0034]

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a case where an opening portion for inflation and deployment is formed in a conventional instrument panel cover.

FIG. 2 is a longitudinal sectional view taken along line 2-2 of FIG. 1;

FIG. 3 is a perspective view of a main part of an instrument panel cover provided with a passenger airbag device, showing a first embodiment of a passenger airbag device according to the present invention.

FIG. 4 is a longitudinal sectional side view of the airbag device for a passenger seat according to the first embodiment of the present invention, taken along line 40-40 in FIG. 3;

FIG. 5 is a plan view of a main part of an instrument panel cover having a break open portion of the airbag device for a passenger seat according to the first embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view of a main part of the reinforcing plate in a state in which the passenger airbag device according to the first embodiment of the present invention is operated.

FIG. 7 is a plan view of a main part of an instrument panel cover showing a modified example of a break open portion of the passenger airbag device of the present invention.

FIG. 8 is a plan view of a main part of an instrument panel cover showing still another modified example of the break open portion of the passenger airbag device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Instrument panel 11 Instrument panel cover 11a Boss part 11b Horizontal surface 11c Inclined surface 11d Opening 11e Projection 12 Instrument panel core 20 Case 21 Housing part 22 Partition member 23 Opening 27 Airbag 30 Break open part 30a Contour part 30b Divided part 31, 32 Front and rear break open part 33, 33 Reinforcement plate 34 Hinge 35 Reinforcement recess 36 Connection hole 37 Convex

Claims (9)

[Claims] 1. An instrument panel core constituting an instrument panel of a vehicle, an instrument panel cover fixed so as to cover a surface of the instrument panel core, and an instrument panel core mounted on a passenger seat of the instrument panel core. An airbag device for a passenger's seat, comprising a case that accommodates, in a folded state, inflated and deployed by gas from an inflator, and a case that has an opening at a location facing the back surface of the instrument panel cover; The panel cover is provided with a rupturable opening portion that can be divided facing the opening of the case, and the contour portion and the divided portion of the rupture opening portion form a fragile portion and are each divided by the dividing portion. One end is connected to the back surface of the break opening portion of the An assistant characterized in that a reinforcing plate material connected to an opening end face of the torment panel cover or the case is fixed, and the break open portions are deployed apart from the divided portion when the airbag is inflated and deployed. Airbag device for seats. 2. A fragile portion is formed at the split portion of the break open portion so as to divide the break open portion into two substantially at a central portion along the left-right direction of the vehicle. Airbag device for passenger seat. 3. The breaking open portion divided into two portions is formed by biasing the split portion so that the passenger seat side of the vehicle has a slightly smaller area than the windshield side. 3. The airbag device for a passenger seat according to claim 1, wherein 4. An opening of the case is arranged close to the breaking open portion and the split portion, and is accommodated in the opening of the case so as to withstand the fragile portion of the break open portion and the split portion from external pressure. The passenger airbag device according to any one of claims 1 to 3, wherein the airbag device is reinforced. 5. An uneven portion is formed at the opposite end of each reinforcing plate fixed to the back surface of the split open portion to be divided,
The airbag device for a passenger seat according to any one of claims 1 to 4, wherein the divided portions are arranged corresponding to each other in a staggered manner. 6. The left and right fragile portions of the break open portion are each formed of a convex curve ending at the split portion and a combination of the convex curve and the oblique line, and an acute angle is formed at the end of the split portion of the panel cover. The airbag device for a passenger seat according to any one of claims 1 to 5, wherein the projecting portion is formed, and the divided portion is formed so as to be shifted toward a passenger seat side of the vehicle. 7. The passenger seat according to claim 1, wherein the split opening portion is installed on a horizontal plane of an instrument panel cover near a front window on a front side of the vehicle. Air bag device. 8. The split open portion on the passenger seat side of the vehicle has a size that does not protrude from the horizontal surface portion of the instrument panel cover toward the inclined front side of the front passenger seat when the airbag is inflated and deployed. The passenger-side airbag device according to claim 7, wherein 9. A fragile portion formed in the contour portion and the divided portion of the break open portion, the laser generated from the laser generating means is applied to the contour portion and the split portion of the break open portion from the back side of the instrument panel cover. The airbag device for a passenger seat according to any one of claims 1 to 8, wherein the airbag device is formed by irradiation while being relatively moved along the vehicle.