JP2008126714A - Air bag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device effectively constraining the head of an occupant, in an air bag having a shoulder constraining part. <P>SOLUTION: The air bag 100 deployed and inflated at a collision of a vehicle has head constraining panels 180, 190 held between left and right inner panels 130, 140 constituting the shoulder constraining part 107. The head constraining panels 180, 190 form a head constraining surface part, i.e., a slightly-projected surface opposed to the head of the occupant P at a front part 105 of the air bag 100, and effectively constrains the head of the occupant P from the front. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an airbag device that is mounted on a vehicle such as an automobile and is deployed in a collision to restrain an occupant. In particular, the present invention relates to a so-called twin-type airbag device including a plurality of shoulder restraining portions that restrain both shoulders of an occupant.

  As an airbag device for the passenger seat, the head of the occupant is restrained flexibly, and both shoulders are restrained by denting the center in the width direction of the front facing the occupant, and restraining the shoulders on both sides. The part is known.

For example, in Patent Document 1, in order to form such a shoulder restraint portion, a pair of outer panels that respectively constitute both side surface portions, and a region that is inside the outer panel and faces the occupant are divided into two in the width direction. A pair of inner panels arranged in a substantially C shape, joining the outer peripheral edge of the inner panel to the outer peripheral edge of the adjacent outer panel, and connecting the inner peripheral edges of the inner panels to each other An airbag in which a shoulder restraint is formed by joining is described.
JP 2006-103654 A

However, in the conventional airbag device described above, the head of the occupant is restrained by a V-shaped valley formed by the inner panel at the time of a collision. Of these, the effective length (stroke) of the portion contributing to the shock absorption of the passenger may be reduced.
This invention is made | formed from such a viewpoint, and makes it a subject to provide the airbag apparatus which restrains a passenger | crew's head effectively in the airbag which has a shoulder restraint part.

The airbag device of the present invention that solves the above problems is formed by joining a plurality of panels formed by a base fabric, and is provided with a front portion facing an occupant during deployment and a blowing port spaced from the front portion. And an air bag having left and right side surfaces and upper and lower surface portions disposed between the front surface portion and the base end portion, and a gas supply means for supplying a developing gas to the blowing port. .
The airbag has a configuration that expands and inflates in a region between the vehicle occupant and the instrument panel in the event of a vehicle accident. In the present invention, the “base end portion” indicates a base portion where the airbag is supported on the vehicle body side, and is typically provided at an end portion of the airbag on the vehicle front side. Further, the “front portion” is a surface portion that restrains an occupant during a frontal collision, and is typically disposed at an end portion on the vehicle rear side so as to face the vehicle rear side.

  In particular, the airbag of the present invention includes at least a left outer panel, a right outer panel, a left inner panel, a right inner panel, and a head restraint panel formed of a base fabric. The present invention includes a configuration including other panels and a configuration in which one of these panels is divided into a plurality of panels. Moreover, the structure which joined the base fabric of the several panel partially is also included.

Each outer panel mainly constitutes the left and right side surface portions of the airbag, but also includes those that constitute a part of the front surface portion, the upper surface portion, the front surface portion and the like of the airbag together with the left and right side surface portions.
Each inner panel is disposed inside each outer panel, and constitutes a front portion that faces the occupant when deployed, together with the head restraint panel. Each inner panel is joined to the outer peripheral edge of each outer panel at the outer peripheral edge to form an outer joint line, and the inner peripheral edge formed by bending is joined to the end of the head restraint panel in the width direction. The inner joint line is formed.
In the present invention, since the circumference of the head protection panel is shorter than the circumference of the outer joint line, the head protection panel has a smaller diameter than the outer joint line when the airbag is deployed and inflated. Thus, the head restraint position is disposed at a position deeper on the base end side than the outer joint line. As a result, a substantially groove-shaped recess extending in the vertical direction is formed at the center in the width direction of the front portion including the head restraint panel. And a pair of shoulder restraint part which restrains a passenger | crew's shoulder part is formed in the both sides which pinched | interposed the recessed part.

The head restraint panel constitutes a front portion together with each inner panel, and is formed in a belt shape extending substantially in the vertical direction at the front portion, and both end portions in the width direction are respectively connected to the inner peripheral edge portion of each inner panel and the inner joint line described above. Are joined together.
Typically, the head restraint panel is arranged in a curved manner when viewed from the side substantially along the center line in the width direction of the airbag over the upper surface portion, the front surface portion, and the lower surface portion of the airbag. It is formed in a band shape. And a head restraint panel comprises the groove bottom face of the substantially groove-shaped recessed part mentioned above.
According to such a configuration, a slightly convex head restraint surface portion in which the head restraint panel is disposed substantially in front of the occupant's head is formed between the shoulder restraint portions. This head restraint surface portion does not escape to the side or the like when contacting the occupant's head, and can effectively transmit the pressure of the gas for deployment to the occupant's head from the front. It can be restrained well. This reduces the burden on the occupant's neck.
Moreover, even when the entire airbag is formed wide in order to improve the occupant's restraint, the recessed portion around the head restraint surface is larger (wider) than when there is no head restraint panel. Thus, the capacity of the airbag can be reduced, and the deployment gas generated by the gas supply means can be effectively used to deploy and expand the airbag in an appropriate form even with a relatively small amount of gas generation. It can be carried out.
Further, the presence of such a head restraint surface portion allows the deployment gas to be received from substantially the front when the airbag is deployed, and the deployment of the airbag is stabilized.

In the present invention, the head restraint panel can be configured such that the upper side is formed wider than the lower side.
According to such a configuration, an appropriate stroke and the surface width of the head restraint surface portion can be obtained according to the physique of the passenger to be restrained. Specifically, in the case of a passenger who has a small physique and whose head is in contact with the lower region of the head restraint surface portion, the width of the head restraint panel in this region is made narrower than the upper region. Thus, effective occupant restraint corresponding to the physique can be realized by reducing the stroke and the width of the head restraint surface portion and narrowing the interval between the left and right shoulder restraint portions.

In this invention, it is good also as a structure which is integrally formed from the same base fabric as a head restraint panel, and has a tether part which connects each outer panel.
According to such a configuration, by regulating the width direction dimension of the airbag, it is possible to prevent the airbag from excessively inflating in the width direction to increase the volume, and the shoulder restraint portion and the head restraint surface portion are appropriate. The airbag can be deployed and inflated to form.

In the present invention, the plurality of panels include a front panel provided between the outer peripheral edges of each outer panel in the region on the base end side of the airbag, and the head restraint panel is the same as the front panel. It is good also as a structure formed integrally from cloth.
According to such a configuration, it is possible to form the head restraint surface portion as described above without increasing the number of parts with respect to an existing airbag having a front panel.

As described above, according to the present invention, when the airbag is deployed, the head restraint panel forms a slightly convex head restraint surface portion that faces the occupant's head. Since the pressure of the developing gas can be effectively transmitted from the front to the occupant's face or the like without escaping in the lateral direction due to contact with the occupant, the occupant's head can be restrained with an appropriate stroke.
Moreover, since the dent around the occupant restraint surface increases and the capacity of the airbag is reduced, the airbag can be deployed and inflated in an appropriate form even with a relatively small amount of gas generation.

Hereinafter, embodiments of an airbag device of the present invention will be described with reference to FIGS. 1 to 14.
In the present specification, the front-rear direction, the up-down direction, and the left-right direction (width direction) indicate the front-rear direction, the up-down direction, and the left-right direction of the vehicle on which the airbag device is mounted.

<First Embodiment>
FIG. 1 is a schematic side view showing the overall configuration of the airbag apparatus according to the first embodiment.
The airbag device is used for a passenger seat of an automobile, for example, and is of a top mount type that is mounted on an upper portion of the instrument panel 10.
The airbag device includes an airbag 100, a case 210, a collision sensor 220, a controller 230, an inflator 240, and the like.

The airbag (main body) 100 is formed, for example, by stitching a plurality of panels formed by cutting out a nylon base fabric, and between the instrument panel 10 and the front screen 20 in the event of a vehicle collision, When the passenger P sitting on the passenger seat 30 moves forward, it is restrained.
The airbag 100 will be described in more detail later.

  The case 210 is a part that accommodates and fixes the folded airbag 100 and the inflator 240 before deployment. The case 210 is disposed below the upper surface portion in the instrument panel 10.

The collision sensor 220 includes an acceleration pickup that detects an impact generated when the vehicle collides, and outputs the output to the controller 230.
The controller 230 determines whether the airbag 100 needs to be deployed based on the output of the collision sensor 220, and supplies a deployment signal to the inflator 240 when it is determined that deployment is necessary.

  The inflator 240 is a gas generator that generates a deployment gas that deploys the airbag 100 when the airbag 100 is deployed (such as when a vehicle collides). The inflator 240 includes a gas generating agent that generates nitrogen gas or the like during combustion, and an igniter that ignites the gas generating agent via an igniting agent.

FIG. 2 is a plan view of the airbag 100 after deployment (inflation) as viewed from above.
3 is a cross-sectional view taken along the line III-III in FIG.
The airbag 100 includes a front surface portion 101, a side surface portion 102, an upper surface portion 103, a lower surface portion 104, and a front surface portion 105.
The front surface portion 101 is a slightly convex surface portion that faces the front side of the vehicle. The front portion 105 is a portion that faces the occupant P at the end of the airbag 100 on the occupant P side (rear side of the vehicle) and restrains the occupant P at the time of a collision.

The side surface portion 102, the upper surface portion 103, and the lower surface portion 104 are surface portions provided between the side edge portions, between the upper edge portions, and between the lower edge portions of the front surface portion 101 and the front surface portion 105, respectively.
The front part 101 is formed so that the projected area when viewed from the front side of the vehicle is smaller than that of the front part 105. As a result, the airbag 100 is formed in a substantially square frustum shape whose front side is narrowed as a whole. Yes.

Moreover, the front part 105 is provided with the head restraint surface part 106 and the shoulder restraint part 107 (107L, 107R).
The head restraint surface portion 106 is formed by denting the center portion of the front portion 105 in the vehicle width direction into a groove shape extending substantially in the vertical direction, and the surface thereof is slightly convex to face the occupant P substantially. It is a face part. The upper end portion and the lower end portion of the head restraint surface portion 106 wrap around part of the upper surface portion 103 and the lower surface portion 104 on the vehicle rear side.
The shoulder restraint portions 107 are provided on both sides of the head restraint surface portion 106 in the vehicle width direction, and are formed so as to protrude relative to the head restraint surface portion 106 toward the occupant P side (vehicle rear side). .

  Further, the lower surface portion 104 is formed with a blowing port 108 (see FIG. 4) through which a developing gas is blown at a base end portion provided on the front side of the vehicle. The airbag 100 is supported by fixing the peripheral portion of the air inlet 108 to a retainer (not shown) fixed to the case 210 described above.

FIG. 4 is a view showing a state in which the panel constituting the airbag 100 is deployed in a planar shape.
The airbag 100 includes a left outer panel 110, a right outer panel 120, a left inner panel 130, a right inner panel 140, and a main panel 150.

The left outer panel 110 and the right outer panel 120 constitute left and right side portions 102 of the airbag 100 after deployment.
The left outer panel 110 and the right outer panel 120 each include an outer peripheral edge portion including front end edge portions 111 and 121, upper end edge portions 112 and 122, lower end edge portions 113 and 123, and rear end edge portions 114 and 124, respectively. Among these, the upper edge portions 112 and 122, the lower edge portions 113 and 123, and the rear edge portions 114 and 124 are formed so as to be curved so as to have a shape obtained by cutting out the ring over about a half circumference. Yes.
Further, each outer panel 110, 120 is appropriately provided with a vent hole (not shown) for discharging the deployment gas from the airbag 100 in order to adjust the internal pressure of the airbag 100 after deployment and inflation.

The left inner panel 130 and the right inner panel 140 are arranged inside the left outer panel 110 and the right outer panel 120 described above and sandwiched between them, and the shoulder restraining portion 107 in the front portion 105 of the airbag 100 after deployment is provided. Constitute.
The left inner panel 130 and the right inner panel 140 include outer peripheral edge portions 131 and 141 and inner peripheral edge portions 132 and 142, respectively.

  The outer peripheral edge portions 131 and 141 are formed in a shape obtained by cutting out the ring over about a half circumference, and are respectively formed on the upper edge portions 112 and 122, the lower edge portions 113 and 123, and the rear edge portions 114 and 124 of the outer panels 110 and 120, respectively. It is the part which is arranged along and is sewn continuously with these. This stitched portion becomes the outer joint line So. These outer peripheral edge portions 131 and 141 are formed in a shape that substantially matches the corresponding outer peripheral edge portion of the outer panel when the outer panels 110 and 120 and the inner panels 130 and 140 are respectively extended on a plane.

The inner peripheral edge portions 132 and 142 are respectively arranged on the inner sides of the outer peripheral edge portions 131 and 141 with a space therebetween, and are formed in a shape obtained by cutting the ring over approximately a half circumference (a belt shape curved along a substantially arc). These inner panels 130 and 140 are stitched together with head restraint panel portions 170 and 180 of the main panel 150 to be described later along the inner peripheral edge portions 132 and 142. This stitched portion becomes the inner joint line Si.
Here, each of the head restraint panel portions 170 and 180 and the outer joint line So, which will be described later, are formed so as to have a substantially arc shape opened on the front side of the vehicle when viewed from the side. Since the peripheral length of the panel portions 170 and 180 is shorter than the peripheral length of the outer joint line So, when the airbag 100 is deployed, each head restraint panel portion 170, A head restraint surface portion 106 is formed, in which 180 is disposed deeper on the proximal end side than the shoulder restraint portion 107 including the outer joint line So.

The main panel 150 is integrally formed by cutting the front panel portion 160, the upper head restraint panel portion 170, and the lower head restraint panel portion 180 from the same base fabric.
The front panel portion 160 constitutes the front surface portion 101 of the airbag 100 and portions of the upper surface portion 103 and the lower surface portion 104 on the vehicle front side (base end portion side).
The front panel portion 160 includes left and right side edge portions 161. Further, the upper end portion and the lower end portion of the front panel portion 160 are formed continuously with the front end portion of the upper head restraint panel portion 170 and the front end portion of the lower head restraint panel portion 180, respectively.

The side edge portion 161 of the front panel portion 160 is sewn to the front end edge portions 111 and 121 of the outer panels 110 and 120 and the vehicle front side regions of the upper end edge portions 112 and 122 and the lower end edge portions 113 and 123, respectively. Part.
Further, the front panel portion 160 is formed with a blowing port 108 in a region that becomes the lower surface portion 104 side when the airbag 100 is deployed.

The upper head restraint panel 170 and the lower head restraint panel 180 extend in a curved manner along the center line in the width direction and viewed from the side over the upper surface portion 103, the front surface portion 105, and the lower surface portion 104 of the airbag 100. It is formed in a belt shape. Of these, the upper head restraint panel 170 constitutes a region above the central portion of the front portion 105 in the height direction, and the lower head restraint panel 180 constitutes a region below this. The left and right side edge portions 171 and 181 of the upper head restraint panel 170 and the lower head restraint panel 180 are sewn along the inner peripheral edge portions 132 and 142 of the inner panels 130 and 140 and the inner joint line Si described above. .
Further, the upper head restraint panel 170 and the lower head restraint panel 180 are slightly narrower than the front panel portion 160.
The upper head restraint panel 170 and the lower head restraint panel 180 are parts constituting the head restraint surface portion 106 when the airbag 100 is deployed.

  The main panel 150 including the front panel portion 160, the upper head restraint panel 170, and the lower head restraint panel 180 has a central portion in the height direction of the front portion 105 of the airbag 100 as shown in FIG. By sewing the lower end portion 172 of the upper head restraint panel 170 and the upper end portion 182 of the lower head restraint panel 180, the airbag 100 is formed in a ring shape when viewed from the side.

  In the airbag 100, the corresponding edge of each panel described above is sewn into a bag shape, and then the whole is turned over from the blowing port 108, so that the seam allowance provided at the edge of each panel is the airbag. It will be in the state arrange | positioned inside 100. FIG. Thereafter, the airbag 100 is folded according to a predetermined pattern such as a bellows shape.

Next, the operation | movement at the time of the vehicle collision in the airbag apparatus of 1st Embodiment is demonstrated.
During normal use of the vehicle (before a collision), the airbag 100 is housed inside the instrument panel 10 while being folded and placed in the case 210.
When the vehicle collides with the front, the collision sensor 220 detects the acceleration generated by the collision. When the controller 230 determines that the airbag 100 needs to be deployed based on the output of the collision sensor 220, the controller 230 outputs a deployment signal to the inflator 240. The inflator 240 generates a deployment gas in response to the deployment signal, and the deployment gas is introduced into the airbag 100 through the blowing port 108, and the airbag 100 starts a deployment and inflation operation by this pressure.

  As shown in FIG. 1, the airbag 100 after deployment restrains the occupant P moving forward at the front surface portion 105 thereof. At this time, the pair of left and right shoulder restraint portions 107 restrains both shoulders of the occupant P, and the head including the face of the occupant P is flexibly restrained by the head restraint surface portion 106.

Next, the effect by 1st Embodiment is demonstrated compared with the airbag apparatus which concerns on the comparative example of this invention demonstrated below. In each of the embodiments and comparative examples described below, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and differences will be described.
FIG. 5 is a plan view of the airbag 100A after deployment in the airbag apparatus of the comparative example as viewed from above. 6 is a cross-sectional view taken along the line VI-VI in FIG.
In the airbag 100A, the main panel 150 is provided with only the front panel portion 160 without the upper head restraint panel portion 170 and the lower head restraint panel portion 180 in the first embodiment. The left and right inner panels 130 and 140 have their inner peripheral edge portions 132 and 142 joined to each other, and a central joint line Sc is formed here. As a result, as shown in FIG. 5, the head restraint surface portion 106 as in the first embodiment is not formed, and between the shoulder restraint portions 107 is a substantially V-shaped groove portion when viewed from above. ing.

FIG. 7 is a schematic plan view showing a difference in an occupant restraint state at the time of a vehicle collision in the first embodiment and the comparative example.
In the case of the comparative example shown in FIG. 7B, when the head of the occupant P comes into contact with the front portion of the airbag 100A, the head of the occupant P spreads the left and right inner panels 130 and 140, As a result, the restraint of the head is started after the head of the occupant P moves forward to the vicinity of the central joint line Sc. For this reason, the stroke (effective length of the part which contributes to shock absorption) in the front-back direction of the airbag 100A is reduced.

  On the other hand, in the case of the first embodiment shown in FIG. 7A, the head restraint panel portions 170 and 180 are substantially positive with respect to the head of the occupant P between the shoulder restraint portions 107. A slightly convex head restraint surface portion 106 is formed. Since the head restraint surface portion 106 does not escape to the side or the like when contacting the head of the occupant P, it is easy to secure a stroke necessary for absorbing the shock. Moreover, since the pressure of the gas for deployment can be effectively transmitted from the front to the head of the occupant P, the head of the occupant can be more effectively restrained. This reduces the burden on the occupant's neck.

Further, even when the airbag 100 is formed wide in order to improve the restraint performance of the occupant P, the dents around the head restraint surface portion 106 are compared to the case where the head restraint panel portions 170 and 180 are not provided. By increasing the (groove width), the capacity of the airbag 100 can be reduced, the amount of gas generated by the inflator 240 can be effectively utilized, and even if the amount of gas generated is relatively small, Deployment and expansion can be performed in a suitable form.
Further, the presence of such a head restraint surface portion 106 allows the deployment gas to be received from substantially the front when the airbag 100 is deployed, and the deployment of the airbag 100 is stabilized.

<Second Embodiment>
Next, a second embodiment of the airbag device of the present invention will be described.
FIG. 8 is a plan view of the airbag 100B after deployment in the second embodiment as viewed from above.
FIG. 9 is a view taken along the arrow IX-IX in FIG. 8 (an elevation view as seen from the vehicle rear side).
10 is a cross-sectional view taken along the line XX in FIG.
FIG. 11 is an external perspective view showing a state in which a portion of the airbag 100B on the vehicle rear side is viewed obliquely from the upper side and obliquely from the rear side.

In the airbag 100B of the second embodiment, the head restraint surface portion 106 is formed in an inverted trapezoidal shape that is wider on the upper side than on the lower side when viewed from the vehicle rear side.
Further, in the first embodiment described above, the joint for making the main panel 150 into a ring shape is between the lower end 172 of the upper head restraint panel 170 and the upper end 182 of the lower head restraint panel 180. However, in the second embodiment, it is provided between the upper end portion of the front panel portion 160 and the front end portion of the upper head restraint panel portion 170 (upper joint line Su). In other words, in the second embodiment, the main panel 150 is formed in a belt shape in which the front panel portion 160, the lower head restraint panel portion 180, and the upper head restraint panel portion 170 are sequentially continuous.

FIG. 12 is a schematic diagram showing a state where an occupant P of different physique abuts against the airbag 100B of the second embodiment at the time of a vehicle collision, and FIG. 12 (a) and FIG. 12 (b) The state seen from the side and the back is shown, respectively.
As shown in FIG. 12 (a), the airbag 100B of the second embodiment has a head restraint surface portion so that the stroke S1 when the physique of the occupant P is large is larger than the stroke S2 when the physique is small. 106 is formed. As a result, for the passenger P having a large physique and a large impact energy at the time of a collision, it is possible to secure a relatively large stroke and to secure the shock absorbing ability by the airbag 100B, and to appropriately restrain depending on the physique. It can be carried out.

  In addition, as shown in FIG. 12B, the airbag 100B of the second embodiment has the shoulder restraint portion 106 in an inverted trapezoidal shape. As a result, in the region where the occupant P having a large physique is restrained, In the region where the interval between the restraint portions 107 is large and the occupant P having a small physique is restrained, the interval between the shoulder restraint portions 107 is small. Can do.

<Third Embodiment>
Next, a third embodiment of the airbag device of the present invention will be described.
FIG. 13 is a development view showing members constituting the airbag 100C according to the third embodiment.
In the third embodiment, a tether portion 190 that restricts the width direction dimension of the airbag 100C is provided at the upper end portion of the lower head restraint panel portion 180 of the main panel 150 when deployed.
The tether portion 190 is integrally formed from the same base fabric as the main panel 150.
The tether portion 190 is formed so as to protrude from the upper end portion of the lower head restraint panel portion 180 to both sides in the width direction. Be joined.

FIG. 14 is a plan view of a portion on the vehicle rear side when the airbag 100C according to the third embodiment is deployed as seen from above.
As shown in FIG. 14, when the airbag 100C is deployed and inflated, the tether portion 190 is pulled outward in the width direction by the outer panels 110 and 120 and is in a tensioned state, and functions as a tether belt. The width direction dimension of the bag 100C is regulated.

  As described above, according to the third embodiment, when the airbag 100C is deployed and inflated with the deployment gas, the tether portion 190 is extended and functions as a tether belt that regulates the widthwise dimension of the airbag 100C. Therefore, it is possible to prevent the airbag 100 from expanding more than necessary in the width direction. As a result, the deployment gas is effectively supplied to the vehicle rear side (occupant side), the airbag 100 can be deployed in an appropriate form, and the head restraint surface portion 106 and the shoulder restraint portion 107 are well formed. Thus, the occupant P can be restrained efficiently. Further, since the increase in the volume of the airbag 100 can be suppressed, the deployment gas generated by the inflator can be effectively utilized for deployment to the occupant side, and even an inflator with a relatively small amount of gas generation is satisfactory. Expansion and expansion can be performed. And since the tether part 190 is integrally formed from a common base cloth with the other part of the main panel 150, it does not increase the number of parts such as a panel, and at the time of deployment of the airbag 100 with an inexpensive configuration. The outer shape can be maintained.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and various applications and modifications are possible. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

  In the third embodiment, the tether portion that regulates the width direction dimension of the airbag is provided. However, the present invention is not limited to this, and a tether portion that extends in the front-rear direction, the up-down direction, and the oblique direction of the airbag is provided. Thus, the dimensions at arbitrary locations may be regulated.

  In addition, the division pattern and the number of panels constituting the airbag can be changed as appropriate. For example, the left and right outer panels may be integrally formed, or the left and right outer panels and the front panel may be integrally formed. Further, in a place where strength is required, a configuration may be adopted in which a plurality of panels are stacked and reinforced. Moreover, you may form a head restraint panel part separately from a front panel part.

It is a typical side view showing composition in a 1st embodiment of an airbag device of the present invention. It is the top view which looked at the airbag in a 1st embodiment from the upper part side. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is an expanded view which shows the structural member of the airbag in embodiment. It is the top view which looked at the airbag which is a comparative example of this invention from the upper side. It is VI-VI part arrow directional cross-sectional view of FIG. It is a typical top view showing the difference in the crew member restraint state at the time of vehicles collision in the 1st embodiment of the present invention, and a comparative example. It is the top view which looked at the airbag in 2nd Embodiment of the airbag apparatus of this invention from the upper side. It is the IX-IX part arrow directional view of FIG. It is XX section arrow sectional drawing of FIG. It is an external appearance perspective view which shows the state which looked at the vehicle back side part of the airbag of FIG. 8 from diagonally upward side and diagonally backward side. It is a schematic diagram which shows the state which the passenger | crew from which a physique contact | abutted the airbag of 2nd Embodiment. It is an expanded view which shows the structural member of the airbag in 3rd Embodiment of the airbag apparatus of this invention. It is the top view which looked at the vehicle rear side part at the time of expansion | deployment of the airbag of FIG. 13 from the upper side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Instrument panel 20 Front screen 100,100A, 100B, 100C Airbag 101 Front surface part 102 Side surface part 103 Upper surface part 104 Lower surface part 105 Front surface part 106 Head restraint surface part 107 Shoulder restraint part 108 Blowing port 110 Left outer panel 120 Right outer panel 130 left inner panel 131 outer peripheral edge 132 inner peripheral edge 140 right inner panel 141 outer peripheral edge 142 inner peripheral edge 150 main panel 160 front panel part 170 upper head restraint panel part 180 lower head restraint panel part 190 tether part 210 case 220 Collision sensor 230 Controller 240 Inflator Si Inner joint line So Outer joint line Sc Center joint line

Claims (4)

A front portion that is configured by joining a plurality of base fabric panels and faces an occupant during deployment, a base end portion that is provided with a blowing port that introduces a gas for deployment spaced from the front portion, and the front portion And an airbag having left and right side portions and upper and lower surface portions disposed between the base end portion and the base end portion;
An air bag device comprising: gas supply means for supplying a gas for deployment to the blowing port;
As the plurality of base fabric panels,
A left outer panel and a right outer panel that respectively constitute the left and right side surfaces;
A left inner panel and a right inner panel, which are arranged inside each outer panel and joined to the outer peripheral edge of each outer panel at the outer peripheral edge thereof, and have an inner peripheral edge formed by bending;
The head restraint panel that constitutes the front portion together with each inner panel, is formed in a belt shape extending substantially in the vertical direction at the front portion, and has both end portions in the width direction joined to the inner peripheral edge portion of each inner panel. And an airbag device characterized by comprising:   The airbag device according to claim 1, wherein the head restraint panel is formed wider on the upper side than on the lower side.   The airbag device according to claim 1 or 2, further comprising a tether portion integrally formed from the same base fabric as the head restraint panel and connecting the outer panels. As the plurality of base fabric panels, in the region on the base end side of the airbag, including a front panel provided between outer peripheral edges of the outer panels,
The airbag device according to claim 1, wherein the head restraint panel is integrally formed from the same base fabric as the front panel.

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