JP2013112015A - Airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably receive impacts on at least a part of the shoulders and the breast, and the head by parts expanded in modes suitable for them, respectively.SOLUTION: An airbag device 10 for receiving an occupant by expansion and unfolding motions includes an airbag body 20 which has a gas supply port, and an inflator. The airbag body 20 includes a left-side abutting portion 32L which receives at least a part of the left half side of the occupant's shoulders and breast in an expanded and unfolded state thereof, a right-side abutting portion 32R which receives at least a part of the right half side of the occupant's shoulders and breast, and a head abutting portion 40 which receives at least a part of the occupant's head. The right-side and left-side abutting portions 32R and 32L adjoin each other in a width direction a vertical boundary portion 36 in a further depressed state than depressed states of them. The right-side and left-side abutting portions 32R and 32L and the head abutting portion 40 vertically adjoin each other via a width-direction boundary portion 38 in a further depressed than depressed state of them.

Description

  The present invention relates to an airbag device for protecting a vehicle occupant.

  Conventionally, this type of airbag device is disclosed in Patent Document 1. The airbag device disclosed in Patent Literature 1 includes a left half airbag and a right half airbag. Moreover, the left and right side surfaces of the left half airbag and the right half airbag are connected to each other by a hanging strap, thereby restricting the width when the airbags are inflated. In this airbag device, the left half airbag and the right half airbag receive the chest.

JP 2004-244005 A

  However, in the airbag apparatus, the reception of the head is not particularly considered. Even if the head enters between the left half airbag and the right half airbag, it is unclear whether the head impact can be properly absorbed. Further, there is a risk that the head may come into contact with the left half airbag or the right half airbag due to a deviation or variation in the approach locus of the head.

  In view of the above, an object of the present invention is to make it possible to stably receive the impact of at least a part of the shoulder and the chest and the head at a portion expanded in a manner suitable for each.

  In order to solve the above-described problem, a first aspect is an airbag device that receives an occupant by an inflating and deploying operation, and includes an airbag body having a gas supply port, and a gas in the airbag body through the gas supply port. A left abutting portion that receives at least a part of the left half side of the shoulder portion and the chest portion of the occupant in the inflated and deployed state, and the shoulder portion of the occupant And a right contact portion that receives at least a part of the right half side of the chest, and a head contact portion that receives at least a portion of the head of the occupant, the left contact portion and the right contact Adjacent to each other in the width direction through a vertical boundary in a state where the contact portion is recessed more than them, and the left contact portion, the right contact portion, and the head contact portion are recessed more than them. Up and down through the border in the width direction Adjacent to each other in the direction.

  A 2nd aspect is an airbag apparatus which concerns on a 1st aspect, Comprising: The said airbag main body is formed in the bag-shaped member which forms a single air chamber as a whole, and is uniform among the said bag-shaped members. In the virtual expansion portion to be expanded in a curved manner, the length of the line-shaped portion corresponding to the vertical boundary portion and the width direction boundary portion is shortened to suppress the expansion in the line. A direction boundary and the width direction boundary are formed.

  A 3rd aspect is an airbag apparatus which concerns on a 1st or 2nd aspect, Comprising: The said up-down direction boundary part and the said width direction boundary part are formed so that a Y-shape may be drawn as a whole.

  A 4th aspect is an airbag apparatus which concerns on any one 1st-3rd aspect, Comprising: In the expansion | deployment deployment state of the said airbag main body, the said left side contact part and the said head side contact part, The right contact portion swells greatly toward the occupant side.

  A fifth aspect is an airbag device according to any one of the first to fourth aspects, wherein the head part abutment portion extends along the vertical direction and is small in the vertical direction. An inflatable part is formed.

  According to the first aspect, the left-side contact portion and the right-side contact portion are adjacent to each other in the width direction through the vertical boundary portion in a state where the left-side contact portion and the right-side contact portion are recessed more than the left-side contact portion and the right-side contact portion. Part and the head contact part are adjacent to each other in the vertical direction through the width direction boundary part in a state of being recessed more than them, so that the line of the vertical direction boundary part and the width direction boundary part, the amount of dents, etc. are adjusted. By doing so, the tension of the left contact portion, the right contact portion, and the head contact portion can be adjusted. Thereby, the impact of a shoulder part, a chest part, and a head can be stably received by the part expanded in the mode suitable for each.

  According to the second aspect, the airbag main body is formed in a bag-like member that forms a single air chamber as a whole, and in the virtual inflation portion to be inflated in a uniform curved manner among the bag-like members, The vertical boundary portion and the width direction boundary portion are formed by reducing the length dimension of the line-shaped portion corresponding to the vertical direction boundary portion and the width direction boundary portion to suppress expansion in the line. Since the head contact portion, the left contact portion, and the right contact portion are formed, the airbag main body can be easily manufactured.

  According to the third aspect, since the vertical boundary portion and the width direction boundary portion are formed so as to draw a Y-shape as a whole, the head contact portion is separated from the intersection point thereof and is as soft as possible. can do.

  According to the fourth aspect, after at least a part of the shoulder and chest of the occupant is received by the left contact portion and the right contact portion, the head portion can be received by the head contact portion.

  According to the 5th aspect, a tension | tensile_strength can be made smaller by an up-down direction small expansion part. By receiving the head with the vertically small expansion portion, the head can be gradually received even if the head is displaced vertically and contacts the head contact portion.

It is a schematic perspective view which shows the state after completion | finish of expansion | deployment of the airbag apparatus which concerns on embodiment. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is a figure which shows the example of a shape of the base fabric for forming an airbag main body. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is a schematic perspective view which shows the state after completion of expansion | deployment of the airbag apparatus which concerns on a modification. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is the perspective view which represented the expansion | swelling shape of the airbag main body typically with the polyhedron. It is a figure which shows the example of a shape of the base fabric for forming an airbag main body. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus. It is explanatory drawing which shows operation | movement of an airbag apparatus.

  Hereinafter, the airbag apparatus according to the embodiment will be described. 1 is a schematic perspective view showing a state after the inflation and deployment of the airbag device 10 is completed, and FIGS. 2 to 5 are perspective views schematically showing the inflation shape of the airbag body 20 by a polyhedron. Is an arrow view from the direction A in FIG. 2, FIG. 4 is an arrow view from the direction B in FIG. 2, and FIG. 5 is an arrow view from the direction C in FIG.

  The airbag device 10 is a device that is incorporated in a dashboard in front of a passenger seat of a vehicle, inflates and deploys in front of a passenger in the passenger seat at the time of a vehicle collision, etc., and receives the passenger in the passenger seat to absorb the impact. . Of course, the airbag device 10 is not limited to the airbag device for the passenger seat, but can be applied to an airbag for a driver's seat incorporated in a steering device.

  The airbag device 10 includes an airbag body 20 and an inflator 12 (see FIG. 2).

  The airbag body 20 is formed in a bag shape that can be inflated and deployed. A gas supply port 22h is formed in the airbag body 20 (see FIG. 2).

  The gas supply port 22h is formed in a portion of the airbag body 20 that faces the dashboard in the inflated and deployed state. Here, the gas supply port 22h is formed in the downward surface of the airbag main body 20 (front of the vehicle with respect to the vehicle, left side in FIGS. 1 and 2).

  The inflator 12 is attached to the gas supply port 22h. The inflator 12 includes an ignition device, a gas generating agent, and the like, and is configured to generate gas by igniting and burning the gas generating agent by the ignition device. Then, upon receiving an ignition command signal from an impact detection unit or the like of the vehicle, the ignition device ignites and burns the gas generating agent, and the gas generated thereby is supplied into the airbag body 20 through the gas supply port 22h. Thus, the airbag main body 20 is inflated and deployed.

  A shape for the airbag main body 20 to receive an occupant in the inflated and deployed state will be described.

  That is, the airbag main body 20 is inflated and deployed in a bag shape as a whole. In the inflated and deployed configuration of the airbag main body 20, the portion of the airbag main body 20 facing the occupant side includes the left contact portion 32 </ b> L and the right side. A contact portion 32R and a head contact portion 40 are included.

  Here, the airbag main body 20 is formed in a shape inflating from the upper side of the inflator 12 toward the occupant side (the rear side of the vehicle, the right side in FIGS. 1 and 2) and inflating downward at the occupant side portion in a side view. ing. A portion of the airbag body 20 facing the occupant side (portion receiving the occupant) is formed in a shape that extends long in the vertical direction, and extends to a region where the upper body of the occupant in the normal posture is received.

  The left abutting portion 32L is a portion that receives at least a part of the shoulder portion and the left half of the chest of the occupant, and the right abutting portion 32R receives at least a portion of the shoulder portion of the occupant and the right half of the chest. It is the part to receive. In other words, in the inflated and deployed state of the airbag main body 20, the left abutting portion 32L extends in front of at least a part of the left half side of the shoulder and chest of the occupant in the normal posture, and the right abutting portion 32R It spreads forward at least partly on the right half of the shoulder and chest of the occupant. Here, the left abutment portion 32L and the right abutment portion 32R extend in the lower half of the portion of the airbag main body 20 facing the occupant side so as to be divided into left and right and extend in the vertical direction. .

  The left contact portion 32L and the right contact portion 32R inflate and deploy in a long and narrow dome shape along the vertical direction, and the vertical boundary portion 36 is interposed therebetween. The vertical direction boundary portion 36 is formed on a groove that is recessed from the left contact portion 32L and the right contact portion 32R and extends along the vertical direction. The left contact portion 32L and the right contact portion 32R are adjacent to each other in the width direction via the vertical boundary portion 36.

  However, the left abutting portion 32L and the right abutting portion 32R are formed in a smaller area, and each has a shape that is assumed to receive a part of the shoulder half of the occupant or a part of the chest half. There may be.

  The head contact portion 40 is a portion that receives at least a part of the head of the occupant. In other words, in the inflated and deployed state of the airbag main body 20, the head contact portion 40 extends in front of the head of the passenger in the normal posture. Here, the head contact portion 40 is provided so as to spread in the upper half of the portion of the airbag body 20 facing the occupant side.

  The head contact portion 40 expands and develops in a dome shape above the left contact portion 32L and the right contact portion 32R. Therefore, the width direction boundary portion 38 extending along the width direction is interposed between the head contact portion 40 and the left contact portion 32L and the right contact portion 32R. The width direction boundary portion 38 is recessed from the head contact portion 40, the left contact portion 32L, and the right contact portion 32R. The head contact portion 40, the left contact portion 32L, and the right contact portion 32R are adjacent to each other in the vertical direction via the width direction boundary portion 38.

  In the inflated and deployed state of the airbag body 20, the vertical boundary portion 36 is in contact with the width direction boundary portion 38 at the center of the width direction boundary portion 38. That is, three dome-shaped left contact portions 32L, right contact portions 32R, and head contact portions 40 are formed around one point. In the inflated and deployed state of the airbag main body 20, the width direction boundary portion 38 and the vertical direction boundary portion 36 are drawn in a Y shape or a T shape as a whole. When the width direction boundary portion 38 and the vertical direction boundary portion 36 draw a Y shape as a whole, the width direction boundary portion 38 is bent at the intersection with the vertical direction boundary portion 36 to draw a V shape. Whether the width direction boundary portion 38 draws a straight line shape or a V shape depends not only on the position of the width direction boundary portion 38 before expansion and expansion, but also the size of the expansion of the left contact portion 32L and the right contact portion 32R. The size depends on the size of the head contact portion 40 that expands. If the width direction boundary portion 38 and the vertical direction boundary portion 36 are drawn in a Y shape as a whole in the inflated and deployed state of the airbag main body 20, the head contact portion 40 can be made as soft as possible. That is, in the inflated and deployed state of the airbag body 20, a strong tension acts on the narrowed vertical boundary portion 36 and the width direction boundary portion 38, so that it is considered that a large tension acts on the intersection between them. Therefore, by separating the portion of the head contact portion 40 where the head is predicted to be in contact with the intersection, the predicted portion can be softened. However, when the width direction boundary portion 38 and the vertical direction boundary portion 36 are drawn in a T-shape as a whole and the intersections thereof are lowered, the positions of the left contact portion 32L and the right contact portion 32R are also lowered. Therefore, by making the width direction boundary portion 38 and the vertical direction boundary portion 36 draw a Y shape as a whole, the left contact portion 32L and the right contact portion 32R are suitable for receiving the shoulder portion. The head contact portion 40 (particularly where the head is predicted to contact) can be softened away from the intersection while being provided at the position. That is, the softness of the head contact portion 40 can be adjusted also by the shape of the width direction boundary portion 38.

  The airbag main body 20 is formed, for example, by narrowing a bag-like member formed so as to form a single air chamber as a whole along lines corresponding to the vertical boundary 36 and the width boundary 38. can do. In other words, in the virtual inflatable portion that should be inflated in a uniform curved manner among the bag-like members, the length dimension of the portion along a certain line is shortened to suppress the expansion in the line, thereby forming a line shape. The recessed upper and lower direction boundary portions 36 and the width direction boundary portion 38 can be formed. When a bag-like member is manufactured by sewing, a configuration is provided in which the length of the line is locally shortened by setting the shape of a cloth to be stitched, a sewing line, and the like (the line is shortened). Can be adopted.

  Further, in the inflated and deployed state of the airbag main body 20, the left contact portion 32 </ b> L and the right contact portion 32 </ b> R are greatly inflated toward the occupant side with respect to the head contact portion 40. In other words, in the inflated and deployed state of the airbag body 20, the distance between the left contact portion 32L and the right contact portion 32R and the shoulder and chest of the occupant is the distance between the head contact portion 40 and the occupant's head. It is set to be smaller than the distance (see FIG. 7). Accordingly, the left contact portion 32L and the right contact portion 32R are in contact with the occupant before the head contact portion 40 with respect to the airbag body 20 in the inflated and deployed state.

  Further, when the occupant's head abuts against the head abutment portion 40 of the airbag body 20 in the inflated and deployed state, the air bag body 20 is set so as to be gradually recessed inward from the inflated state. Preferably, the head contact part 40 is set so that the left contact part 32L and the right contact part 32R bulge toward the right shoulder and the left shoulder while avoiding the central part of the chest. If the protrusion amount of the left contact part 32L and the right contact part 32R is set large, the right shoulder part and the left shoulder part come into contact first, and the center part of the chest is the vertical direction boundary part 36 and the width direction boundary part 38. There is a tendency to avoid initial contact with the intersection. Further, for example, the position, shape, dent amount and the like of the width direction boundary portion 38 are appropriately set speculatively and experimentally, and the shapes of the head contact portion 40, the left contact portion 32L, and the right contact portion 32R are set. By appropriately adjusting, the softness (hardness) of the head contact portion 40, the left contact portion 32L, and the right contact portion 32R of the airbag body 20 in the inflated and deployed state of the airbag body 20 can be adjusted. it can.

  The airbag main body 20 can be formed, for example, by appropriately joining sheet-like members by sewing or the like. The airbag main body 20 is formed by forming the head contact portion 40, the left contact portion 32L, the right contact portion 32R, and other portions with separate sheet-like members, and stitching them together. Alternatively, some or all of them may be formed by stitching a common sheet-like member. An example of manufacturing the airbag body 20 will be described below.

  First, as shown in FIG. 6, a main base fabric 50, a pair of first small base fabrics 52 and 52, and a second small base fabric 54 are prepared. Each of these base fabrics is a member formed into a predetermined shape by cutting a sheet-like member such as a cloth or a resin sheet.

  The main base fabric 50 is a portion that mainly constitutes both side portions, an upper portion, and the head contact portion 40 of the airbag body 20, and is formed in a shape in which the portions are developed. The pair of first small base fabrics 52 and 52 is a portion mainly constituting the left contact portion 32L or the right contact portion 32R and the lower left half portion or the right half portion of the airbag body 20, and the portions are developed. It is formed in the shape. The second small base fabric 54 is a portion that mainly constitutes both side portions and a lower portion of the airbag main body 20 in the vicinity of the attachment location of the inflator 12, and is formed in a shape in which the portion is developed.

  The peripheral portions of the main base fabric 50, the pair of first small base fabrics 52 and 52, and the second small base fabric 54 are stitched together. Here, in FIG. 6, the same circled number portions attached to the respective peripheral edge portions are stitched together. And the bag-like member obtained by sewing is reversed through the gas supply port 22h. Then, the airbag main body 20 having the shape shown in FIGS. 1 to 5 is obtained.

  The operation of the airbag device 10 will be described.

  First, as shown in FIG. 7, it is assumed that an occupant P is seated in a normal posture on a passenger seat or the like and is wearing a seat belt. The state in which the occupant P is seated in a regular posture on the passenger seat or the like refers to a state in which the occupant P is seated with its back part in contact with the seat back.

  In this state, when the vehicle collides, the airbag body 20 is inflated and deployed. The inflated airbag body 20 is inflated in a dome shape toward the occupant P side at the head contact portion 40, and is larger toward the occupant P side at the left contact portion 32L and the right contact portion 32R. It is expanding.

  At this time, a force for moving the occupant P forward is applied due to the sudden deceleration of the vehicle. However, the occupant P is restrained mainly by the seat belt around the waist. As a result, the head, shoulders, and chest of the occupant P tend to move forward around the waist.

  Then, as shown in FIG. 8, the shoulder portion and the chest portion come into contact with the left contact portion 32L and the right contact portion 32R. Thereby, the left contact portion 32L and the right contact portion 32R absorb the shock of the shoulder portion and the chest portion. In addition, since there is a concave vertical boundary 36 between the left contact portion 32L and the right contact portion 32R, the shoulder and chest are connected to the left contact portion 32L and the right contact portion 32R. Can be distributed and received.

  Further, when the occupant P moves forward about the waist, the head abuts against the head abutting portion 40 as shown in FIG.

  When the head moves further forward, as shown in FIG. 10, the head contact portion 40 receives the head while being recessed inward. Thereby, the impact of a head can be received gradually. At this time, since the head contact portion 40 does not protrude from the left contact portion 32L and the right contact portion 32R, warping of the head is suppressed. Further, since the head abutting portion 40 is softly received while being recessed inward, the warping of the head is suppressed from this point.

  According to the airbag apparatus 10 configured as described above, the left contact portion 32L and the right contact portion 32R are adjacent to each other via the vertical boundary portion 36 in a state where the left contact portion 32L and the right contact portion 32R are recessed more than the left contact portion 32L. The right abutting portion 32R and the head abutting portion 40 are adjacent to each other in the vertical direction via the width direction boundary portion 38 in a state of being depressed more than them. Therefore, by adjusting the line of the vertical boundary 36 and the width boundary 38 (that is, the size of each abutting portion), the amount of dent (that is, the protruding amount of each abutting portion), etc. The tension (ie, softness) of the contact portion 32L, the right contact portion 32R, and the head contact portion 40 can be adjusted. Thereby, the impact of a shoulder part, a chest part, and a head can be stably received by the part expanded in the mode suitable for each.

  Moreover, the up-down direction boundary part 36 is interposed between the left contact part 32L and the right contact part 32R, and it is not configured as a bag from which they are separated. Further, the left contact portion 32L and the right contact portion 32R are connected to each other by the head contact portion 40 at the upper side. For this reason, the left contact portion 32L and the right contact portion 32R are not separated from each other, and are easily set at the positions of both shoulders.

  Further, the airbag body 20 is formed in a bag shape so as to form a single air chamber as a whole, and in the virtual inflating portion to be inflated in a uniform curved manner among the bag-like members, the vertical boundary portion 36 is formed. And the length direction boundary part 36 and the width direction boundary part 38 are formed by shortening the length dimension of the line-shaped part corresponded to the width direction boundary part 38, and suppressing expansion | swelling in the said line. As a result, the head contact portion 40 is formed above the width direction boundary portion 38, and the left contact portion 32L is formed below the width direction boundary portion 38 and on the left side of the vertical direction boundary portion 36. A right abutting portion 32R is formed below the boundary portion 38 and on the right side of the vertical boundary portion 36. For example, as described above, the airbag body 20 can also be formed by stitching a plurality of base fabrics linearly at the peripheral edges. For this reason, it can manufacture simply compared with the structure which combined several independent bags, and providing a tether belt etc. in a bag and forming a predetermined | prescribed expansion | swelling shape.

  However, for the purpose of forming the head contact portion 40, the left contact portion 32L, and the right contact portion 32R, or other purposes, other bag-like portions, tether belts, and the like are combined. May be.

  Further, since the vertical boundary portion 36 intersects at the center of the width direction boundary portion 38, the occupant can be received in a balanced manner on the left and right.

  In particular, it is easy to set the head contact portion 40 soft by making the vertical boundary portion 36 and the width direction boundary portion 38 as a whole Y-shaped.

  Moreover, since the head contact portion 40 is deformed from a state of swelling outward to a state of recessing inward due to the contact of the head, the head can be gradually received.

  Further, since the left contact portion 32L and the right contact portion 32R protrude larger than the head contact portion 40, the shoulder and chest of the occupant are received by the left contact portion 32L and the right contact portion 32R. After the momentum is relaxed, the head can be received by the head contact portion 40.

  A modification will be described based on the above embodiment. 11 is a schematic perspective view showing a state after the inflation and deployment of the airbag device 110 is completed, and FIGS. 12 to 15 are perspective views schematically showing the inflation shape of the airbag main body 120 by a polyhedron. Is an arrow view from the A direction in FIG. 12, FIG. 14 is an arrow view from the B direction in FIG. 12, and FIG. 15 is an arrow view from the C direction in FIG.

  The airbag device 110 includes an airbag body 120 corresponding to the airbag body 20 and an inflator 12.

  The difference between the airbag main body 120 and the airbag main body 20 is that a vertical small inflating portion 142 is formed in a head contacting portion 140 corresponding to the head contacting portion 40. The small vertical expansion portion 142 is formed in a shape that extends in the vertical direction and expands outward. The width dimension of the vertically small inflatable portion 142 is smaller than the width of the head contact portion 140 and the airbag body 120 (here, sufficiently small). Moreover, the length dimension of the up-down direction of the up-down direction small expansion part 142 is larger than the width dimension. However, it is preferable that the small vertical expansion portion 142 is set long enough to extend as much as possible in the vertical direction of the head contact portion 140. 12 to 14 are diagrams showing a combination state of polyhedrons, and thus the vertically small inflating portion 142 is shown in a state of being recessed inside, the vertically small inflating portion is actually inflated and deployed. 142 bulges outward.

  For the same reason as described above, the projecting dimension obtained by combining the head contact part 140 with the vertical small expansion part 142 is set smaller than the projecting dimensions of the left contact part 32L and the right contact part 32R. .

  The airbag body 120 can be formed by appropriately joining sheet-like members by stitching or the like, similarly to the airbag body 20. With reference to FIG. 16, the example of the base fabric for manufacturing the airbag main body 120 is demonstrated. That is, similar to the airbag body 20, the main base cloth 150 corresponding to the main base cloth 50, the pair of first small base cloths 152, 152 corresponding to the pair of first small base cloths 52, 52, Two small base fabrics 54 are prepared. The main difference between the main base fabric 150 and the main base fabric 50 is that in the central portion in the width direction, in the central portion in the width direction of the vertical small expansion portion 142, an elongated triangular region 142a and a pair of first small fabrics. An extension region 142b for connecting to the base fabrics 152, 152 is provided. The main difference between the pair of first small base fabrics 152 and 152 from the pair of first small base fabrics 52 and 52 is that a region 152b connected to the extended region 142b is provided.

  Then, the peripheral portions of the main base fabric 150, the pair of first small base fabrics 152, 152, and the second small base fabric 54 are stitched together so as to join the same circled number portions in FIG. . Thereby, the airbag main body 20 of the shape shown in FIGS. 11-15 is obtained.

  The operation of the airbag device 110 will be described.

  First, as shown in FIG. 17, it is assumed that an occupant P is seated in a normal posture on a passenger seat and wearing a seat belt.

  In this state, when the vehicle collides, the airbag main body 120 is inflated and deployed. The inflated and deployed airbag body 20 is inflated in a dome shape toward the occupant P side at the head abutting portion 40, and is further long in the up and down direction toward the occupant P side in the vertically small inflatable portion 142. Is inflated. In addition, the left abutting portion 32L and the right abutting portion 32R of the airbag body 20 are more inflated toward the occupant P side.

  At this time, when a force for moving the occupant P forward is applied due to sudden deceleration of the vehicle, the shoulder portion and the chest portion contact the left contact portion 32L and the right contact portion 32R as shown in FIG.

  Further, when the occupant P moves forward about the waist, as shown in FIG. 19, the head comes into contact with the vertical small expansion part 142 in the head contact part 140.

  When the head moves further forward, as shown in FIG. 20, the head contact portion 140 receives the head while being recessed inwardly with the vertical small expansion portion 142 as the center. Thereby, the impact of a head can be received gradually. At this time, since the head contact portion 40 including the vertical small expansion portion 142 does not protrude from the left contact portion 32L and the right contact portion 32R, the head warping is suppressed.

  In addition, since the vertically small expansion portion 142 swells in an area that is even smaller than the head contact portion 140, more specifically, in a narrow area, the region portion where the head is initially in contact is made softer. Can do. Thereby, a head can be received more softly. In addition, since the head contact portion 140 is long in the vertical direction, the head contact portion is displaced above or below the position where the head is supposed due to the physique of the occupant, the sitting posture, and the like. Even if it contacts 140, it can be made to contact reliably by the vertically small expansion part 142 long along the up-down direction. Thereby, even if the head is displaced in the vertical direction and comes into contact with the head contact portion 140, the head can be received softly by the vertical small expansion portion 142 with certainty.

  In addition, it is possible to catch the head so that the momentum is gradually stopped at a long distance as soon as the vertical small expansion portion 142 is provided.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10, 110 Air bag apparatus 12 Inflator 20, 120 Air bag main body 22h Gas supply port 32L Left side contact part 32R Right side contact part 36 Vertical direction boundary part 38 Width direction boundary part 40, 140 Head part contact part 142 Vertical direction small Expansion part

Claims (5)

An airbag device that receives an occupant by inflating and deploying,
An airbag body having a gas supply port;
An inflator for supplying gas into the airbag body through the gas supply port;
With
In the inflated and deployed state, the airbag body includes a left contact portion that receives at least a part of a left half side of the shoulder and chest of the occupant, and a right side of the shoulder and chest of the occupant. A right abutting portion for receiving at least a portion, and a head abutting portion for receiving at least a portion of the occupant's head,
The left side contact part and the right side contact part are adjacent to each other in the width direction through a vertical boundary part in a state where the left side contact part and the right side contact part are recessed more than them.
The airbag device, wherein the left contact portion, the right contact portion, and the head contact portion are adjacent to each other in a vertical direction through a width direction boundary portion in a state where the left contact portion and the right contact portion are recessed from each other. The airbag device according to claim 1,
The airbag body is formed in a bag-like member that forms a single air chamber as a whole,
In the virtual inflatable portion to be inflated in a uniform curved manner in the bag-like member, the length of the line-like portion corresponding to the vertical boundary portion and the width direction boundary portion is shortened to expand in the line. The airbag apparatus by which the said up-down direction boundary part and the said width direction boundary part are formed by suppressing. The airbag device according to claim 1 or 2,
The airbag apparatus formed so that the said up-down direction boundary part and the said width direction boundary part may draw a Y shape as a whole. The airbag device according to any one of claims 1 to 3,
The airbag device in which the left contact portion and the right contact portion are more inflated toward the occupant side than the head contact portion in the inflated and deployed state of the airbag body. It is an airbag apparatus as described in any one of Claims 1-4, Comprising:
An airbag device in which a vertical small inflating portion extending in the vertical direction and bulging outward is formed in the head contact portion.

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