JP2005178587A - Air bag device for pedestrian - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for a pedestrian which is easily mounted and has improved versatility. <P>SOLUTION: The air bag device 3 is mounted to the inside of a hood 2 of which the rear part can move vertically. The air bag device 3 has a cover body 16 made of resin, a front end mounting part 16b of the front end of the cover body 16 is fixed to the hood 2, and a locking piece 16c of the rear end is held by the hood 2 removably in deploying an air bag 7. In deploying the air bag 7, the locking piece 16c of the cover body 16 interferes with a protrusion 10a of a cowl panel 10 to move the rear part of the hood upwards, and the air bag 7 deploys to the front side of the windshield. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pedestrian airbag device mounted on a vehicle in order to mitigate an impact on a pedestrian.

  Conventionally, when a traveling vehicle collides with a pedestrian, the pedestrian is flipped up by an impact at the time of the collision, and there is a risk of secondary collision with a hood, a windshield, a front pillar, or the like at the front of the vehicle.

  Accordingly, various so-called pedestrian airbag devices have been proposed to alleviate the impact caused by such secondary collisions.

  For example, if an airbag device is placed on the side of the vehicle body chassis located slightly forward under the windshield and collides with a pedestrian, the rear part of the hood is moved upward using the inflating and deploying force of the airbag. In addition, there is a structure that is deployed in front of a windshield or a front pillar to relieve an impact caused by a secondary collision of a pedestrian (see, for example, Patent Document 1 or Patent Document 2).

  In addition, there is a structure in which an airbag device is arranged on the inner surface side of the rear end portion of the bonnet and deployed in front of a windshield or a front pillar to mitigate an impact caused by a secondary collision of a pedestrian (for example, patent document) 3).

JP 2000-264146 A JP 2003-252145 A US Patent Application Publication No. 2002/0074775

  However, as disclosed in Patent Document 1 and Patent Document 2, if the airbag device is structured to be attached to the vehicle body chassis side, there are many interfering objects such as wiper units in the vicinity, and common use for various vehicle types is performed. There was a problem that it was difficult and lacked versatility.

  In addition, as disclosed in Patent Document 3, if the airbag device is attached to the bonnet side, it is easy to install with few interferences and can be easily used for various vehicle types. Therefore, there is a problem that the impact in the secondary collision when the pedestrian collides with the bonnet cannot be mitigated.

  Therefore, the problem to be solved by the present invention is to provide a pedestrian airbag device that is easy to attach and has improved versatility.

  The technical means for solving the above problems are attached to a vehicle having a bonnet whose rear portion is movable up and down, an inflator that generates gas, and expands in front of the windshield of the vehicle that can be expanded by the gas. In the pedestrian airbag device provided with the airbag, the airbag device is mounted inside the bonnet, and the airbag is deployed by moving the rear part of the hood upward by the deployment operation of the airbag. is there.

  The airbag device includes a covering member, and one end of the covering member is directly or indirectly fixed to the bonnet, and the other end of the covering member interferes with the vehicle body chassis when the airbag is deployed. It is good.

  Further, the covering member may be made of a resin cover body, and the other end portion may be held by the bonnet so as to be removable when the airbag is deployed.

  Further, the covering member may be made of a resin cover body, and the other end portion may have a structure in which a tear line provided in a part of the cover body is cut when the airbag is deployed.

  Furthermore, it is good also as a structure which is the protrusion which the position by the side of the said vehicle body chassis which the said other end part interferes protrudes upwards.

  Moreover, the said covering member is good also as a structure comprised so that a bonnet may close by the dead weight of the said bonnet after the expansion | deployment of the said airbag.

  Furthermore, the airbag and the inflator may be covered with a waterproof sheet.

  Moreover, it is good also as a structure where the water drain hole is provided in the said airbag apparatus.

  Furthermore, the folded state of the airbag is folded in a roll shape toward the front of the vehicle on the upper surface side, and the both end portions are folded and held inward in the folded state. It is good also as a structure.

  Further, the airbag is provided with an airbag pillar portion that extends along the left and right front pillars on both sides of the airbag in a protruding shape, and the airbag pillar is held in a folded state on the upper surface side. It is folded in the form of a roll toward the front of the vehicle, and the airbag main body following the airbag pillar is folded in a bellows shape, and both ends thereof are further inwardly folded in the roll shape and the bellows shape. It is good also as a structure folded and hold | maintained.

  Further, the airbag device may include a plurality of the inflators, and the inflator may generate gas with a time difference to deploy the airbag.

  According to the pedestrian airbag device of the present invention, the airbag device is mounted inside the hood, and the airbag is deployed by moving the rear part of the hood upward by the deployment operation of the airbag. The impact caused by the secondary collision of the pedestrian against the bonnet or windshield can be effectively reduced.

  In addition, since the airbag device is mounted inside the bonnet, it is easy to attach and easy to share, and has the advantage of excellent versatility.

  Furthermore, since the rear part of the bonnet is moved upward, it is possible to deploy while avoiding interferences such as a wiper disposed at the lower part of the windshield, and a smooth deployment can be obtained.

  Further, the airbag device includes a covering member, and one end portion of the covering member is directly or indirectly fixed to the bonnet, and the other end portion of the covering member interferes with the vehicle body chassis when the airbag is deployed. As the airbag is deployed, the rear part of the bonnet is moved upward, thereby exhibiting a function of guiding the deployment direction of the airbag when the airbag is deployed.

  At this time, if the other end portion of the covering member is detachably held on the bonnet, the other end portion is detached from the bonnet side when the airbag is deployed, so that the rigidity of the bonnet itself is not separated. From this point, the impact in the secondary collision can be effectively reduced.

  Furthermore, if the covering member is made of a resin cover and the other end is held by the bonnet so that it can be detached when the airbag is deployed, it will be detached when the airbag is deployed, and the rear part of the hood will be The function to move to can be effectively demonstrated.

  Further, if the covering member is made of a resin cover body, and the other end portion is formed by a tear line provided at a part of the cover body being cut when the airbag is deployed, the tear member is deployed when the airbag is deployed. Cut off the line and effectively move the rear part of the hood up.

  Further, if the structure of the vehicle body chassis side where the other end part interferes is a projecting part protruding upward, the deployment direction of the airbag can be guided upward, and the wiper disposed below the windshield It is possible to more effectively prevent interference with the above.

  Further, if the covering member has a structure in which the bonnet is closed by the dead weight of the bonnet after the airbag is deployed, the covering member does not have a strong force to lift and hold the rear part of the bonnet upward. The impact of the next collision can be effectively mitigated, and the bonnet is closed after deployment, so that the front view can be secured well.

  Furthermore, if the airbag and the inflator are structured to be covered with a waterproof sheet, it is possible to effectively prevent functional deterioration due to water intrusion.

  Further, if the airbag device has a structure in which a water drain hole is provided, water can be effectively drained even when water has entered, and functional deterioration due to water intrusion can be effectively prevented.

  Furthermore, the airbag is held in a folded state in the form of a roll toward the front of the vehicle on the upper surface side, and in a state of being folded in the form of a roll, both ends thereof are folded and held inward. Then, the interference with the wiper, the windshield and the like during deployment can be effectively suppressed, and the deployment can be performed smoothly.

  In addition, airbag airbags are provided with protruding airbag pillars that extend along the left and right front pillars on both sides of the airbag. The airbag body part following the airbag pillar part is folded in a bellows shape, and the both end parts are folded inward in the folded state in the roll shape and the bellows shape. If the structure is held, the bellows-like folded part of the airbag is rapidly deployed, so the rear part of the bonnet can be moved up more quickly during deployment, and at the part along the front pillar, Interference can be effectively suppressed and can be deployed smoothly.

  Furthermore, if the airbag device is provided with a plurality of inflators, the inflator generates gas with a time difference, and the airbag is deployed, the deployment time of the airbag inflated state can be extended due to the time difference, The function to relieve the impact caused by the secondary collision more effectively can be exhibited.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a pedestrian airbag device 3 is mounted on a rear inner surface of a bonnet 2 in a vehicle 1. Yes.

  The bonnet 2 is configured such that its rear part can move up and down, and is usually held at a lowered position closed by a suitably provided holding mechanism or the like. For example, it is held at the lowered position by a structure as disclosed in Patent Document 1.

  The airbag device 3 includes an inflator 4 that generates gas, and inflated by the gas. As shown in FIGS. 4 and 5, left and right front pillars on the front side of the windshield 5 of the vehicle 1 and on both sides of the windshield 5. 6 It is set as the structure provided with the airbag 7 expand | deployed ahead.

  That is, the airbag 7 extends over the entire length in the left and right width direction in the lower half portion of the windshield 5, and the airbag body portion 7a over the lower half portion of the left and right front pillars 6 and the left and right portions on both sides of the airbag body portion 7a. A long structure in the vehicle width direction is provided that includes an airbag pillar portion 7b provided in an upward projecting manner along the front pillar 6.

  As shown by the dotted line in FIG. 2, the airbag device 3 is mounted along the left-right direction at a substantially central portion of the rear portion of the bonnet 2 with the airbag 7 folded in an elongated shape in the vehicle width direction. Yes.

  The inflator 4 is structured to operate in response to an operation signal from a pedestrian collision detection sensor, and the pedestrian collision detection sensor is mounted on a front bumper or the like at the front of the vehicle body and collides with a pedestrian during vehicle travel. Is configured to detect.

  As shown in FIG. 1, FIG. 3, FIG. 4, FIG. 6, and FIG. 7, a vehicle body chassis is formed along the vehicle width direction between the bonnet 2 located on the lower front side of the windshield 5. A cowl panel 10 is disposed, and on the lower side of the cowl panel 10, a wiper unit 12 for driving the wiper 11 located on the upper side is mounted. Reference numeral 13 denotes a dash panel that partitions the engine room and the vehicle interior.

  The airbag device 3 is attached to the inner surface side of the bonnet 2 at a position immediately in front of the cowl panel 10. At this time, the airbag 7 is held by a holding member such as an adhesive tape as appropriate at a plurality of positions separated in the vehicle width direction in the folded state (when the airbag 7 is inflated and deployed, it is easily cut by the pressure at the time of deployment). In this folded and held state, the inflator 4 is attached to the screwing portion 2 a provided on the lower surface side of the bonnet 2 via the support bracket 15.

  Further, the airbag device 3 includes a cover body 16 as a covering member that covers the inflator 4 and the airbag 7 from the lower side of the bonnet 2. In the present embodiment, the cover body 16 is an appropriate resin material having flexibility. As shown in FIG. 3, the resin is made of resin and has a structure having a cross-sectional shape and an appropriate length in the vehicle width direction.

  Then, one end of the cover body 16, that is, the front end mounting portion 16 b extending forward from the front upper end portion of the groove-shaped flange portion 16 a is attached to the lower surface of the bonnet 2 by the fixing bolt 17 together with the mounting piece portion 15 a of the support bracket 15. The screw fixing portion 2a on the side is fastened with screws and fixed. The front end mounting portion 16b may be fixed by the fixing bolt 17 at a plurality of positions separated in the vehicle width direction, or may be at one place as long as it can be sufficiently fixed and held. Further, when the mounting piece 15 a of the support bracket 15 is not in the fixed position, only the front end mounting portion 16 b of the cover body 16 may be fixed with the fixing bolt 17.

  Further, a locking piece 16c extends rearward from the other end of the cover body 16, that is, a rear upper end of the flange 16a, and is mounted on a locking receiving portion 2b provided on the inner surface side of the bonnet 2. The cover body 16 is locked in a stationary manner, and is configured to be detachable when the cover body 16 is bent and deformed by the pressure when the airbag 7 is expanded due to inflation. At this time, the position of the locking piece portion 16c held by the locking receiving portion 2b is configured to be disposed immediately above the protruding portion 10a protruding upward on the front side of the cowl panel 10. Note that a plurality of the locking piece portions 16c may be arranged separately in the vehicle width direction, or may be a single structure having an appropriate length in the vehicle width direction. What is necessary is just to determine suitably. Further, the vehicle body chassis side protrusion 10a may also have a structure that continues in the vehicle width direction, or may have a structure in which a plurality of protrusions 10a are provided in the vehicle width direction.

  When the locking piece 16c is detached from the locking receiving portion 2b due to the pressure when the airbag 7 is deployed, the locking piece 16c interferes with the protrusion 10a, and the pressure when the airbag 7 is further deployed. Thereby, the space part between the bonnet 2 and the cover body 16 is expanded. In this case, since the front-side front end mounting portion 16b is screwed by the fixing bolt 17, the rear-side locking piece 16c side in the free end state has a fixing portion by the fixing bolt 17 as a so-called rotation center. Although the locking piece 16c interferes with the protrusion 10a, the rear part of the bonnet 2 is lifted relatively with the deployment of the airbag 7, as shown in FIGS. Here, the rear part of the bonnet 2 moves upward, and the airbag 7 is deployed toward the windshield 5 from the gap between the bonnet 2 and the cover body 16 in the upward movement state. .

  In addition, an appropriate number of drain holes 16d are provided at the bottom of the flange portion 16a of the cover body 16 in the vehicle width direction.

  Further, in the present embodiment, as shown in FIG. 8, the folded holding state of the airbag 7 extends in the front direction of the vehicle 1 on the upper surface side over the entire region S of the airbag pillar portion 7b and the airbag main body portion 7a. Folded in a roll shape toward the roll, and in the folded state, the both end portions (for example, portions corresponding to the airbag pillar portions 7b on both sides) are held in a folded state inside. Yes.

  This embodiment is configured as described above. When the vehicle 1 collides with a pedestrian during traveling, a collision with a pedestrian is detected by a pedestrian collision detection sensor, and a collision load greater than or equal to a predetermined value is detected. When detected, an operation signal is output to the inflator 4 of the airbag device 3.

  Then, the operation of the inflator 4 generates gas and the airbag 7 is inflated. As the airbag 7 is inflated, the cover body 16 is pressed and deformed from the inner surface side, and the locking piece 16c that is not fixed is detached from the locking receiving portion 2b and interferes with the protrusion 10a. As the airbag 7 is inflated, the rear part of the bonnet 2 is relatively pushed up, and in the pushed state, the airbag is directed toward the windshield 5 from the gap between the bonnet 2 and the cover body 16. 7 expands.

  Therefore, even when a pedestrian that has collided with the vehicle 1 jumps up and collides with the bonnet 2, the windshield 5, and the front pillar 6, the rear part of the bonnet 2 is pushed upward, Since the front of the front pillar 6 is covered with the inflated and deployed airbag 7, the impact in the secondary collision can be effectively reduced.

  At this time, since the locking piece 16c of the cover body 16 of the airbag device 3 fixed to the inner surface side of the bonnet 2 is detached from the bonnet 2 side, the rigidity of the bonnet 2 itself is also less than that of the structure. From this point, the impact in the secondary collision can be effectively reduced.

  Further, since the cover body 16 is made of a flexible resin material, the force for lifting and holding the rear portion of the bonnet 2 is not strong, and the impact of the secondary collision on the hood 2 by the pedestrian is more effective. Can be relaxed. At this time, if the rigidity of the cover body 16 is configured so as to be bent and deformed by its own weight and the bonnet 2 is closed, the bonnet 2 is automatically closed after the airbag 7 is deployed. It becomes possible to secure it well.

  Furthermore, since the airbag device 3 having a simple shape that is folded and held inside the bonnet 2 is mounted, there is not much interference such as mounting parts attached to the vehicle 1 and the mass production At the same time, it can be easily mounted on a wide variety of vehicles, and it has the advantage of being easy to share and excellent in versatility, and has a structure in which the upper side of the airbag device 3 is covered with a bonnet 2. Therefore, there is an advantage that it is difficult to apply water and water countermeasures can be easily taken.

  Further, the rear part of the bonnet 2 is moved upward by using the pressure generated by the deployment of the airbag 7, so that the structure can be simplified, and the airbag 7 can be moved with the rear part of the bonnet 2 moved upward. As shown in FIG. 7, the air bag 7 can be deployed while avoiding interference such as the wiper 11 disposed at the lower part of the windshield 5, and the airbag 7 can be smoothly deployed.

  Further, when the airbag 7 is deployed, the locking piece 16c of the cover body 16 interferes with the protrusion 10a on the vehicle body chassis side, and the bonnet 2 has the protrusion 10a as a fulcrum with the fixed position by the fixing bolt 17 as the center of rotation. The rear part of the hood 2 is moved upward as the airbag 7 is deployed, so that a space is opened in the deployment direction of the airbag 7 and the airbag 7 is deployed. The function of guiding the deployment direction of the airbag 7 is effectively exhibited.

  Moreover, since the position on the vehicle body chassis side where the locking piece 16c of the cover body 16 interferes is the protrusion 10a protruding upward, the deployment direction of the airbag can be guided further upward, and the hood 2 The rear portion can be moved upward more effectively, and interference with the wiper 11 and the like disposed below the windshield 5 can be more effectively prevented.

  Further, since the drainage hole 16d is provided in the flange portion 16a of the cover body 16, even when water enters the inside of the flange portion 16a, it can be drained effectively, and the inflator 4 and the airbag 7 due to the penetration of water. It is possible to effectively prevent the deterioration of the function.

  Further, the airbag 7 is folded and held in the form of a roll toward the front of the vehicle 1 on the upper surface side, and in the folded state, the both ends thereof are folded and held inside. As shown in FIGS. 9 to 12, when the airbag 7 is deployed, the airbag 7 is sequentially deployed so as to roll in a direction opposite to the wound direction. Interference can be effectively suppressed and can be smoothly deployed.

  On the other hand, as shown in FIG. 8, the pillar portion region L1 of the airbag pillar portion 7b is folded in a roll shape toward the front side of the vehicle 1 on the upper surface side as described above, and the air following the airbag pillar portion 7b. The main body region L2 of the bag main body portion 7a is folded in a bellows shape, and the both end portions (for example, portions corresponding to the airbag pillar portions 7b on both sides) are further folded inward in the folded state in the roll shape and the bellows shape. If the airbag 2 is held in a folded state, the bellows-like folded portion of the airbag 7 is rapidly deployed. Therefore, when the airbag 7 is deployed, as shown in FIGS. The airbag body 7a can be quickly deployed to move the rear part of the bonnet 2 more quickly, and the part along the front pillar 6 In smoothly deploy able interference effectively suppressed.

  Also, as shown by the phantom lines in FIG. 3, if the structure is such that the inflator 4 and the air bag 7 are supported by the support bracket 15 in a state of being covered with a waterproof sheet 20 that can be easily broken, the inflator 4 and the air bag It is possible to more effectively prevent a functional deterioration due to water intrusion into the bag 7.

  Furthermore, in the above embodiment, the inflator 4 has a single structure, but as shown by the phantom lines in FIG. 2, a structure in which the airbag 7 is deployed by a plurality of inflators 4a, 4b, 4c may be adopted. . At this time, the inflators 4a, 4b, and 4c may be controlled to generate gas with a time difference. For example, if the central inflator 4b is controlled so that gas is generated after a lapse of a predetermined time after the inflators 4a and 4c on both sides generate gas, the air is generated due to the time difference between the time when the gas is generated in the inflators 4a, 4b and 4c. The deployment time in the bag inflated state can be lengthened, and the function of effectively mitigating the impact caused by the secondary collision can be exhibited.

  In addition, in the said embodiment, although the latching piece part 16c of the cover body 16 has shown the structure hold | maintained at the bonnet 2 so that separation | detachment is possible, it is the rear end of the cover body 16 similarly to the front end attaching part 16b of the cover body 16. The part is also fixed to the bonnet 2 side with a fixing bolt or the like, a tear line is formed corresponding to the rear part of the cover body 16, the tear line breaks when the airbag 7 is deployed, and interferes with the protrusion 10a of the cowl panel 10, It is good also as a structure which pushes up the rear part of the bonnet 2. FIG.

  In this case as well, the function of moving the rear part of the hood upward at the broken tear line portion can be effectively exhibited.

  Moreover, although the cover body 16 as a covering member is made of a resin, the airbag 7 presses the vehicle body chassis side with the pressure when the airbag 7 is deployed, and pushes up the rear part of the bonnet 2 upward. If it is set as a structure, the covering member may be made of cloth or the like, and is not limited to the material of the embodiment.

  Further, the locking piece 16c of the cover body 16 abuts against the protrusion 10a of the cowl panel 10 and pushes up the rear part of the bonnet 2; The structure may be such that the portion 16c abuts and pushes up the rear part of the bonnet 2 and is not limited to the structure of the embodiment.

  Moreover, although the structure which attaches the airbag apparatus 3 directly to the inner side of the bonnet 2 with the fixing bolt 17 is shown, the indirect fixing structure which attaches the airbag apparatus 3 to the mounting component of the vehicle 1 attached to the inner side of the bonnet 2 It may be.

1 is a front side view of a vehicle showing an embodiment of the present invention. It is the same perspective view. It is the principal part sectional drawing. It is a front side view at the time of deployment of an airbag. It is the same perspective view. It is operation | movement explanatory drawing at the time of airbag deployment. It is operation | movement explanatory drawing at the time of airbag deployment. It is an expansion state explanatory view of an airbag. It is operation | movement explanatory drawing at the time of airbag deployment. It is operation | movement explanatory drawing at the time of airbag deployment. It is operation | movement explanatory drawing at the time of airbag deployment. It is operation | movement explanatory drawing at the time of airbag deployment. It is operation | movement explanatory drawing at the time of another airbag deployment of a folding state. It is operation | movement explanatory drawing at the time of the airbag deployment. It is operation | movement explanatory drawing at the time of the airbag deployment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Bonnet 3 Airbag apparatus 4 Inflator 5 Front glass 6 Front pillar 7 Airbag 7a Airbag main-body part 7b Airbag pillar part 10 Cowl panel 10a Protrusion part 11 Wiper 12 Wiper unit 15 Support bracket 16 Cover body 16a Ridge part 16b Front end mounting portion 16c Locking piece portion 16d Drain hole 17 Fixing bolt 20 Waterproof sheet

Claims (11)

A pedestrian airbag apparatus including an inflator that generates a gas and an airbag that can be inflated by the gas and that is deployed in front of the windshield of the vehicle, and is attached to a vehicle including a bonnet whose rear portion is movable up and down. In
The airbag device is attached to the inside of the bonnet, and the airbag is deployed by moving the rear part of the hood upward by the deployment operation of the airbag. In the pedestrian airbag apparatus according to claim 1,
The airbag device includes a covering member, and one end portion of the covering member is directly or indirectly fixed to the bonnet, and the other end portion of the covering member interferes with the vehicle body chassis when the airbag is deployed. A pedestrian airbag device. In the pedestrian airbag device according to claim 2,
2. The pedestrian airbag apparatus according to claim 1, wherein the covering member is made of a resin cover body, and the other end portion is held by the bonnet so as to be removable when the airbag is deployed. In the pedestrian airbag device according to claim 2,
The covering member is formed of a resin cover body, and the other end portion is formed by cutting a tear line provided in a part of the cover body when the airbag is deployed. apparatus. In the airbag apparatus for pedestrians in any one of Claim 2 thru | or 4,
The pedestrian airbag apparatus characterized in that the vehicle body chassis side position where the other end part interferes is a protruding part protruding upward. In the pedestrian airbag device according to any one of claims 1 to 5,
The pedestrian airbag apparatus according to claim 1, wherein the covering member is configured so that the bonnet is closed by the weight of the bonnet after the airbag is deployed. In the airbag apparatus for pedestrians in any one of Claim 1 thru | or 6,
The airbag device for pedestrians, wherein the airbag and the inflator are covered with a waterproof sheet. In the airbag apparatus for pedestrians in any one of Claim 1 thru | or 7,
A pedestrian airbag apparatus, wherein a water drain hole is provided in the airbag apparatus. In the airbag apparatus for pedestrians in any one of Claim 1 thru | or 8,
The airbag is held in a folded state in a roll shape toward the front of the vehicle on the upper surface side, and in a state of being folded in the roll shape, both ends thereof are further folded inward and held. An air bag device for pedestrians. In the airbag apparatus for pedestrians in any one of Claim 1 thru | or 8,
The airbag is provided with protruding airbag pillars that extend along the left and right front pillars on both sides of the airbag, and the airbag pillar is held in the folded state when the airbag pillar is in front of the vehicle. The airbag body part following the airbag pillar part is folded in a bellows shape, and the both end parts are folded inward in the folded state in the roll shape and the bellows shape. A pedestrian airbag apparatus characterized by being held by the user. The pedestrian airbag apparatus according to any one of claims 1 to 10,
A pedestrian airbag apparatus, wherein the airbag apparatus includes a plurality of inflators, and the inflator generates gas with a time difference to deploy the airbag.

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