JP2008062773A - Airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device facilitating seaming of inner panels in an airbag including a shoulder restraining part. <P>SOLUTION: The airbag 100 expanded and inflated in a vehicle collision includes an inner panel 130 arranged under a condition where the same is bent at a bend part FL between a right and a left outer panel 110, 120. The inner panel 130 includes regions 130L, 130R on both sides of the bend part FL and the regions are mutually joined at inner circumference edge parts 132L, 132R separate from outer circumference edge parts 131L, 131R. <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, it was necessary to sew a pair of left and right inner panels on the outer panel at the time of manufacture. At this time, the left and right inner panels may be displaced, so that the alignment is complicated.
This invention is made | formed from such a viewpoint, and makes it a subject to provide the airbag apparatus which can assemble | assemble the panel which comprises an airbag easily 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 of a base fabric, and a front portion that faces an occupant when deployed, and a blowing port is provided apart from the front portion. And at least a gas supply means for supplying a deployment gas to the blowing port, and an airbag having left and right side portions and upper and lower surface portions disposed between the front end portion and the base end portion. Prepare. The airbag has a configuration that is deployed and inflated in an occupant restraint 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, and an inner panel that are configured by 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.

And an inner panel is arrange | positioned inside both outer panels, and comprises the front part which faces a passenger | crew mainly at the time of expansion | deployment. The inner panel is disposed on the base end side in a state where the central portion in the left-right direction is bent, and is typically folded in two along a folding line extending substantially in the vertical direction.
The inner panel is joined to the outer peripheral edge of each corresponding outer panel at the outer peripheral edge.

  According to such a configuration, it is not necessary to align the left and right inner panels as in the case of using the left and right independent inner panels by bending a single inner panel and joining the left and right outer panels respectively. In addition, it is possible to prevent the displacement between the inner panels during sewing, and to easily assemble the airbag.

Further, in the present invention, the inner panel has a region where both sides sandwiching the bent central portion are joined at a joint portion extending in a substantially arc shape whose base end side is open when the airbag is viewed from the side. It is good also as a structure joined mutually.
According to such a configuration, the shape of the front portion such as the depth of the concave portion can be appropriately set by adjusting the distance between the joint portion and the outer peripheral edge portion.

In the present invention, the inner panel may be configured such that an opening is formed inside the joint. In this case, the inner panel is typically formed in a substantially annular shape, and the bent portion is provided at the center in the width direction. And a junction part is formed substantially along the outer peripheral part (inner peripheral part of an inner panel) of opening.
According to such a configuration, since the communication portion that communicates the inside of the airbag in the left-right direction becomes large, the airbag can be evenly deployed on the left and right.

Further, in the present invention, the inner panel may be provided so as to extend over a plurality of locations on the inner peripheral edge portion of the opening, and may have a connecting portion that extends substantially vertically when the airbag is deployed and becomes a tether. Good. The “substantially vertical direction” in the present invention includes an aspect in which the longitudinal direction of the connecting portion is inclined with respect to the vertical direction. In addition, the present invention includes a configuration in which the connecting portions are provided on both sides of the bent portion, and a configuration in which only one of the connecting portions is provided, and the number of connecting portions and the shape of the connecting portions are not particularly limited.
According to such a configuration, when the airbag is deployed and inflated, the connecting portion functions as a tether that regulates the dimension of the airbag in the height direction, so that the airbag can be prevented from excessively inflating in the height direction. For this reason, the opening of the above-mentioned center joint line can be prevented, and the concave portion and the shoulder restraint portion can be developed into appropriate forms. Further, the expansion of the airbag is prevented in an appropriate form by preventing the increase in the volume of the airbag and effectively utilizing the deployment gas generated by the gas supply means, even if the gas generation amount is relatively small. It can be carried out.

Moreover, in this invention, it can be set as the structure containing a front panel as a some panel. The front panel is provided between the outer peripheral edge portions of the outer panels in the region on the base end side of the airbag. And typically, the end part of the base end part side of each inner panel in the upper and lower sides of the airbag is joined to the upper end edge part and the lower end edge part of the front panel, respectively.
According to such a configuration, in the region on the base end side in the airbag, it is possible to enlarge the space portion that communicates in the airbag in the left-right direction or the up-down direction. Can be made.

In the present invention, the airbag may be formed in a substantially square frustum shape whose base end side is narrower than the front side when deployed.
According to such a configuration, as compared with the case where the airbag is formed in a substantially quadrangular pyramid shape, the space inside the airbag in the vicinity of the base end portion can be expanded. Since the space portion communicated with the air bag can be further expanded, the airbag can be deployed and inflated more evenly on the left and right.

  As described above, according to the present invention, the left and right inner panels are arranged between the left and right outer panels in a state where the central portion in the left and right direction is bent at the base end side. It is possible to easily assemble the airbag by preventing the positioning from becoming complicated as in the case of using the panel and the positional deviation between the inner panels.

<First Embodiment>
Hereinafter, a first embodiment of an airbag device of the present invention will be described with reference to FIGS. 1 to 8.
In the present specification, front and rear, up and down, and left and right directions respectively indicate front and rear, up and down, and left and right directions of a vehicle on which the airbag device is mounted.

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 by stitching a plurality of panels formed by cutting out a nylon or polyester base fabric, for example, from between the instrument panel 10 and the front screen 20 at the time of a vehicle collision, When the occupant P that is deployed to the vehicle rear side and sits on the passenger seat 30 moves forward, this 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 for deploying the airbag 100 when the airbag 100 is deployed (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 an external perspective view of the airbag 100 after being deployed (inflated) as viewed from the diagonally upper side on the diagonally forward side. FIG. 3 is an external perspective view of the deployed airbag 100 as seen from the obliquely upper side on the obliquely rear side.
FIG. 4 is a side view of the airbag 100 as viewed from the left side in the vehicle width direction. FIG. 5 is a top view of the airbag 100. FIG. 6 is a front view of the airbag 100 as seen from the passenger side. FIG. 7 is a bottom view of the airbag 100. 5 to 7 are views taken along arrows VV, VI-VI, and VII-VII in FIG. 4, respectively.

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 substantially flat surface portion disposed facing 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 recessed part 106 and the shoulder restraint part 107 (107L, 107R).
The concave portion 106 is formed by denting the central portion of the front portion 105 in the vehicle width direction into a groove shape extending substantially in the vertical direction. The upper end portion and the lower end portion of the concave portion 106 wrap around part of the upper surface portion 103 and the lower surface portion 104 on the vehicle rear side.
The shoulder restraining portions 107 are provided on both sides of the concave portion 106 in the vehicle width direction, and are formed so as to protrude relative to the concave portion 106 toward the occupant P side (the vehicle rear side).

  Further, as shown in FIGS. 6 and 7, the lower surface portion 104 is formed with a blowing port 108 into which a developing gas is blown at a base end portion provided on the vehicle front side. 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. 8 is a view showing a state in which a panel constituting the airbag 100 is developed in a planar shape.
The airbag 100 includes a left outer panel 110, a right outer panel 120, an inner panel 130, and a front panel 140.

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 inner panel 130 is disposed inside the left outer panel 110 and the right outer panel 120 so as to be sandwiched between the inner panel 130 and the inner panel 130. The inner panel 130 forms a concave portion 106 and a shoulder restraining portion 107 in the front portion 105 of the airbag 100 after deployment.
The inner panel 130 is disposed between the outer panels 110 and 120 in a state where the folding line (bent portion) FL is disposed on the base end side and is folded in two.

The inner panel 130 includes a left inner panel portion 130L and a right inner panel portion 130R, which are regions on the left outer panel 110 side and the right outer panel 120 side, respectively, with respect to the folding line FL provided at the center in the left-right direction. Each of these inner panel portions 130L and 130R is formed as a left and right integrated body by cutting out from one base cloth. Moreover, each inner panel part 130L and 130R is a shape substantially symmetrical with respect to the folding line FL.
The left inner panel portion 130L and the right inner panel portion 130R include outer peripheral edge portions 131L and 131R, inner peripheral edge portions 132L and 132R, upper front edge portions 133L and 133R, and lower front edge portions 134L and 134R, respectively.

  The outer peripheral edge portions 131L and 131R are formed in a shape obtained by cutting out the ring over approximately a half circumference, and extend along 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 a part which is arrange | positioned together and is sewn continuously with these. This stitched portion is a side joining line So. These outer peripheral edge portions 131L and 131R are formed in a shape substantially coincident with the corresponding outer peripheral edge portion of each outer panel 110 and 120 when each outer panel 110 and 120 and each inner panel portion 130L and 130R are developed in a planar shape. Has been.

The inner peripheral edge portions 132L and 132R are respectively arranged on the inner sides of the outer peripheral edge portions 131L and 131R with a space therebetween, and are formed in a shape (a belt shape curved along a substantially circular arc) cut out over a substantially half circumference. . The inner panel portions 130L and 130R are sewn together in a substantially arc shape along the inner peripheral edge portions 132L and 132R. This stitched portion becomes the center joint line Sc.
Here, the center joint line Sc and the side joint line So are formed so as to have a substantially arc shape with the vehicle front side opened when viewed from the side. Since it is shorter than the circumferential length of the side joining line So, when the airbag 100 is deployed, the recess 106 is formed along the central joining line Sc due to the pulling caused by the circumferential length difference.

The upper front edge portions 133L and 133R are straight lines connecting the upper edge portions of the outer peripheral edge portions 131L and 131R and the inner peripheral edge portions 132L and 132R when the inner panel 130 is extended in a plane as shown in FIG. It is a part that becomes a shape. These upper front edge portions 133L and 133R are stitched to an upper edge portion 142, which will be described later, of the front panel 140.
The inner panel portions 130L and 130R are connected to each other in the vicinity of the end portions on the inner peripheral edge portions 132L and 132R side of the upper front end edge portions 133L and 133R. Therefore, the upper front edge portions 133L and 133R form a slit in which the upper end portion of the inner panel 130 is cut into a substantially V shape in a state where the inner panel 130 is flattened as shown in FIG. Yes.

The lower front edge portions 134L and 134R connect the lower end portions of the outer peripheral edge portions 131L and 131R and the inner peripheral edge portions 132L and 132R when the inner panel 130 is flattened as shown in FIG. It is a part which becomes a straight line. These upper front edge portions 134L and 134R are stitched to a lower edge portion 143, which will be described later, of the front panel 140.
The inner panel portions 130L and 130R are connected to each other in the vicinity of the end portions on the inner peripheral edge portions 132L and 132R side of the lower front edge portions 134L and 134R. For this reason, the lower front edge portions 134L and 134R form a slit in which the lower end portion of the inner panel 130 is cut into a substantially V shape in a state where the inner panel 130 is flattened as shown in FIG. ing.

  The inner panel 130 is formed in a ring shape as a whole as shown in FIG. 8 by connecting the left and right inner panel portions 130L and 130R as described above, and an inner peripheral edge portion 132L is formed at the center portion thereof. , 132R is formed.

The front panel 140 constitutes the front surface portion 101 of the airbag 100 and the vehicle front side portions of the upper surface portion 103 and the lower surface portion 104, and as shown in FIG. It is formed in a substantially rectangular shape smaller than the dimension in the direction.
The front panel 140 includes an outer peripheral edge portion including left and right side edge portions 141, an upper edge portion 142, and a lower edge portion 143.

The side edge portion 141 is a portion that is sewn to the front end edge portions 111 and 121 of the outer panels 110 and 120 and the regions on the vehicle front side of the upper end edge portions 112 and 122 and the lower end edge portions 113 and 123, respectively.
The upper end edge portion 142 is a portion that is sewn to the upper front end edge portions 133L and 133R of the inner panel portions 130L and 130R. The stitched portion is disposed on the upper surface portion 103 of the airbag 100 and extends substantially along the width direction of the airbag 100.
The lower end edge portion 143 is a portion that is sewn to the lower front end edge portions 134L and 134R of the inner panel portions 130L and 130R. The stitched portion is disposed on the lower surface portion 104 of the airbag 100 and extends substantially along the width direction of the airbag 100.
Further, the front panel 140 is formed with an air inlet 108 in a region that becomes the lower surface portion 104 side when the airbag 100 is deployed.

  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 accommodated in the recess 106, thereby reducing input to the face, and the occupant P The head is constrained flexibly.

  As described above, according to the first embodiment, each of the left and right outer panels 110, 120 is bent in the folding line FL provided at the center in the left-right direction. , And the inner panel does not need to be aligned as in the prior art using the left and right independent inner panels, and the inner panel is prevented from shifting during sewing, and the airbag 100 can be easily sewn. Can be done.

  Further, according to the first embodiment, when the airbag 100 is viewed from the side, the base end side opens when the central joint line Sc where the left and right inner panel portions 130L and 130R are sewn together is opened. By setting it as a substantially circular arc shape, the recessed part 106 and the shoulder restraint part 107 can be formed in a suitable shape.

  Further, according to the first embodiment, by forming the opening O surrounded by the inner peripheral edge portions 132L and 132R in the center portion of the inner panel 130, the communication portion that allows the inside of the airbag 100 to communicate in the left-right direction is provided. Since it becomes large, the airbag 100 can be deployed evenly on the left and right, and the left and right shoulder restraint portions 107 can be appropriately formed.

  Further, according to the first embodiment, by providing the front panel 140 on the base end side of the airbag 100, the communication portion that communicates in the airbag 100 in the left-right direction can be made larger. Therefore, the airbag 100 can be deployed in a more appropriate form.

  In addition, according to the first embodiment, the airbag 100 after deployment is formed in a substantially square frustum shape in which the front surface portion 101 side that is the base end portion side is narrower than the front surface portion 105 side. Thus, for example, when the airbag is formed in a quadrangular pyramid shape, the space inside the airbag 100 on the base end side is enlarged, and the space portion that communicates in the airbag 100 in the left-right direction and the up-down direction is further enlarged Therefore, the airbag 100 can be deployed in a more appropriate form.

<Second Embodiment>
Next, a second embodiment of the airbag apparatus of the present invention will be described with reference to FIGS.
Note that, in each embodiment described below, portions that are substantially the same as those of the first embodiment described above are denoted by the same reference numerals, description thereof is omitted, and differences are mainly described.

FIG. 9 is a diagram illustrating a state in which the panel constituting the airbag 100 according to the second embodiment is developed in a planar shape.
The second embodiment is different from the first embodiment described above in that connecting portions 135L and 135R described below are provided on the left and right inner panel portions 130L and 130R of the inner panel 130, respectively.

  The connecting portions 135L and 135R are belt-like portions that are provided so as to be spanned between two spaced apart portions on the inner peripheral edge portions 132L and 132R, respectively, and are arranged to extend in the vertical direction when the airbag 100 is deployed. . The connecting portions 135L and 135R are formed integrally with the corresponding inner panel portions 130L and 130R by being cut out from the common fabric with the other portions of the inner panel portions 130L and 130R.

FIG. 10 is a perspective view of airbag 100 after deployment in the present embodiment.
In the present embodiment, when the airbag 100 is deployed, the connecting portions 135L and 135R provided on the inner panel portions 130L and 130R are extended to regulate the height direction dimension of the airbag 100. Functions as a tether belt.

  As described above, according to the second embodiment, when the airbag 100 is deployed and inflated with the gas for deployment, the connecting portions 135L and 135R of the inner panel portions 130L and 130R are extended to expand the airbag 100. Since it functions as a tether belt that regulates the dimension in the height direction, it is possible to prevent the airbag 100 from expanding more than necessary in the vertical direction and increasing its volume. As a result, the airbag 100 can be deployed in an appropriate form. Further, the gas for deployment generated by the inflator can be effectively utilized for deployment to the occupant side, and even if the inflator has a relatively small amount of gas generation, satisfactory expansion and expansion can be performed. Since the connecting portions 135L and 135R are integrally formed from a common base cloth with the other portions of the inner panel portions 130L and 130R, the air can be formed by an inexpensive configuration without increasing the number of parts such as panels. The outer shape can be maintained when the bag 100 is deployed.

<Third Embodiment>
Next, a third embodiment of the airbag device of the present invention will be described with reference to FIG.
FIG. 11 is a diagram illustrating a state in which a panel constituting the airbag 100 according to the third embodiment is developed in a planar shape.
In the airbag according to the third embodiment, the left and right inner panel portions 130L and 130R of the inner panel 130 are connected only in the vicinity of the upper front edge portions 133L and 133R, and the lower front edge portions 134L and 134R are separated. It differs from the second embodiment described above in that it has a configuration. In addition, in FIG. 11, the vent hole V which is not illustrated in each embodiment mentioned above is illustrated.
Also in the third embodiment, the same effect as in the first and second embodiments described above can be obtained.

(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 each of the above embodiments, the central joint line Sc that joins the left and right inner panel portions 130L and 130R is formed in a substantially arc shape with the base end side opened, but the shape of the joint portion is limited to this. First, as long as each inner panel portion 130L, 130R is joined on the inner peripheral side separated from the outer peripheral edge portions 131L, 131R, even if it is in other shapes, the pulling is generated and the concave portion 106 and the shoulder restraint are generated. The portion 107 can be formed.
Moreover, the shape of the opening O formed in the center part of the inner panel 130 is not limited to that of each embodiment, and can be changed as appropriate, and can be configured without an opening.

  In the second and third embodiments, one connecting portion 135L and 135R is provided for each of the left and right inner panel portions 130L and 130R. However, the connecting portions 135L and 135R are provided only for one of the inner panel portions. It is good also as a structure. Moreover, it is good also as a structure which provided the some connection part in the one inner panel part.

  In the second and third embodiments, the connecting portions 135L and 135L are integrally formed from a common base cloth with the other portions of the inner panel 130. It is good also as a structure which forms separately from a part and joins these.

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. However, in view of the process of overlapping and sewing the left outer panel 110 and the left inner panel portion 130L, and the right outer panel 120 and the right inner panel portion 130R, it is preferable to separate the outer panel as in each embodiment.
Further, in a place where strength is required, a configuration may be adopted in which a plurality of panels are stacked and reinforced.

It is a typical side view showing the composition in a 1st embodiment of the airbag device of the present invention. It is the external appearance perspective view which looked at the air bag in a 1st embodiment from the slanting upper part of the slant front side. It is the external appearance perspective view which looked at the airbag in a 1st embodiment from the slanting upper part of the slanting back side. It is a side view of the airbag in a 1st embodiment. It is a top view of the airbag in a 1st embodiment. It is a front view of the airbag in a 1st embodiment. It is a bottom view of the airbag in a 1st embodiment. It is an expanded view which shows the structural member of the airbag in 1st Embodiment. It is an expanded view which shows the structural member of the airbag in 2nd Embodiment. It is a perspective perspective view of the airbag in a 2nd embodiment. It is an expanded view which shows the structural member of the airbag in 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Instrument panel 20 Front screen 100 Airbag 101 Front surface part 102 Side surface part 103 Upper surface part 104 Lower surface part 105 Front surface part 106 Recessed part 107 Shoulder restraint part 108 Inlet 110 Left outer panel 120 Right outer panel 130 Inner panel 130L Left inner panel part 130R Right inner panel part 131L, 131R Outer peripheral edge part 132L, 132R Inner peripheral edge part 140 Front panel 210 Case 220 Collision sensor 230 Controller 240 Inflator Sc Center joint line So Side joint line

Claims (6)

A front portion that is formed by joining a plurality of panels formed of a base fabric and that faces an occupant during deployment, a base end portion that is provided with a blowing port that introduces a deployment gas spaced from the front portion, and An airbag having left and right side portions and upper and lower surface portions disposed between the front 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 panels,
A left outer panel and a right outer panel that respectively constitute the left and right side surfaces;
Between the two outer panels, a central portion in the left-right direction is disposed on the base end side to form the front portion, and the outer peripheral edge portion is joined to the outer peripheral edge portion of each outer panel. The inner panel of the left and right ones,
An airbag device comprising: The inner panels are joined to each other at both sides of the bent central portion at a joint portion extending in a substantially arc shape whose base end side is open when the airbag is viewed from the side. The airbag device according to claim 1, wherein: The airbag device according to claim 2, wherein the inner panel has an opening formed inside the joint. The inner panel includes a connecting portion that is provided so as to extend over a plurality of locations on an inner peripheral edge portion of the opening, and that extends in a substantially vertical direction when the airbag is deployed and serves as a tether. 3. The airbag device according to 3. 5. The front panel provided between the outer peripheral edge portions of the outer panels in the region on the base end portion side of the airbag as the plurality of panels. 5. The airbag apparatus as described. The airbag device according to any one of claims 1 to 5, wherein the airbag is formed in a substantially quadrangular pyramid shape in which the base end side is narrower than the front side when deployed.

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